Message ID | 20220601021836.1082160-5-caiyinyu@loongson.cn |
---|---|
State | New |
Headers | show |
Series | GLIBC LoongArch PATCHES | expand |
On 2022-06-01, caiyinyu wrote: >--- > sysdeps/loongarch/__longjmp.S | 52 ++++ > sysdeps/loongarch/bits/endianness.h | 11 + > sysdeps/loongarch/bits/link.h | 58 ++++ > sysdeps/loongarch/bits/setjmp.h | 42 +++ > sysdeps/loongarch/bsd-_setjmp.c | 1 + > sysdeps/loongarch/bsd-setjmp.c | 1 + > sysdeps/loongarch/dl-machine.h | 307 +++++++++++++++++++ > sysdeps/loongarch/dl-trampoline.S | 91 ++++++ > sysdeps/loongarch/jmpbuf-offsets.h | 22 ++ > sysdeps/loongarch/jmpbuf-unwind.h | 45 +++ > sysdeps/loongarch/ldsodefs.h | 41 +++ > sysdeps/loongarch/linkmap.h | 22 ++ > sysdeps/loongarch/machine-gmon.h | 37 +++ > sysdeps/loongarch/setjmp.S | 66 ++++ > sysdeps/loongarch/sotruss-lib.c | 50 +++ > sysdeps/loongarch/start.S | 67 ++++ > sysdeps/loongarch/sys/asm.h | 59 ++++ > sysdeps/loongarch/tst-audit.h | 23 ++ > sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++ > 19 files changed, 1021 insertions(+) > create mode 100644 sysdeps/loongarch/__longjmp.S > create mode 100644 sysdeps/loongarch/bits/endianness.h > create mode 100644 sysdeps/loongarch/bits/link.h > create mode 100644 sysdeps/loongarch/bits/setjmp.h > create mode 100644 sysdeps/loongarch/bsd-_setjmp.c > create mode 100644 sysdeps/loongarch/bsd-setjmp.c > create mode 100644 sysdeps/loongarch/dl-machine.h > create mode 100644 sysdeps/loongarch/dl-trampoline.S > create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h > create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h > create mode 100644 sysdeps/loongarch/ldsodefs.h > create mode 100644 sysdeps/loongarch/linkmap.h > create mode 100644 sysdeps/loongarch/machine-gmon.h > create mode 100644 sysdeps/loongarch/setjmp.S > create mode 100644 sysdeps/loongarch/sotruss-lib.c > create mode 100644 sysdeps/loongarch/start.S > create mode 100644 sysdeps/loongarch/sys/asm.h > create mode 100644 sysdeps/loongarch/tst-audit.h > create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h > >diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S >new file mode 100644 >index 0000000000..b7690dd94f >--- /dev/null >+++ b/sysdeps/loongarch/__longjmp.S >@@ -0,0 +1,52 @@ >+/* longjmp. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#include <sysdep.h> >+#include <sys/asm.h> >+ >+ENTRY (__longjmp) >+ REG_L ra, a0, 0*SZREG >+ REG_L sp, a0, 1*SZREG >+ REG_L x, a0, 2*SZREG >+ REG_L fp, a0, 3*SZREG >+ REG_L s0, a0, 4*SZREG >+ REG_L s1, a0, 5*SZREG >+ REG_L s2, a0, 6*SZREG >+ REG_L s3, a0, 7*SZREG >+ REG_L s4, a0, 8*SZREG >+ REG_L s5, a0, 9*SZREG >+ REG_L s6, a0, 10*SZREG >+ REG_L s7, a0, 11*SZREG >+ REG_L s8, a0, 12*SZREG >+ >+#ifndef __loongarch_soft_float >+ FREG_L $f24, a0, 13*SZREG + 0*SZFREG >+ FREG_L $f25, a0, 13*SZREG + 1*SZFREG >+ FREG_L $f26, a0, 13*SZREG + 2*SZFREG >+ FREG_L $f27, a0, 13*SZREG + 3*SZFREG >+ FREG_L $f28, a0, 13*SZREG + 4*SZFREG >+ FREG_L $f29, a0, 13*SZREG + 5*SZFREG >+ FREG_L $f30, a0, 13*SZREG + 6*SZFREG >+ FREG_L $f31, a0, 13*SZREG + 7*SZFREG >+#endif >+ >+ sltui a0,a1,1 >+ ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 >+ jirl zero,ra,0 >+ >+END (__longjmp) >diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h >new file mode 100644 >index 0000000000..7290be7b18 >--- /dev/null >+++ b/sysdeps/loongarch/bits/endianness.h >@@ -0,0 +1,11 @@ >+#ifndef _BITS_ENDIANNESS_H >+#define _BITS_ENDIANNESS_H 1 >+ >+#ifndef _BITS_ENDIAN_H >+#error "Never use <bits/endianness.h> directly; include <endian.h> instead." >+#endif >+ >+/* LoongArch is little-endian. */ >+#define __BYTE_ORDER __LITTLE_ENDIAN >+ >+#endif /* bits/endianness.h */ >diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h >new file mode 100644 >index 0000000000..4df09989cb >--- /dev/null >+++ b/sysdeps/loongarch/bits/link.h >@@ -0,0 +1,58 @@ >+/* Machine-specific declarations for dynamic linker interface. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#ifndef _LINK_H >+#error "Never include <bits/link.h> directly; use <link.h> instead." >+#endif >+ >+typedef struct La_loongarch_regs >+{ >+ unsigned long int lr_reg[8]; /* a0 - a7 */ >+ double lr_fpreg[8]; /* fa0 - fa7 */ >+ unsigned long int lr_ra; >+ unsigned long int lr_sp; >+} La_loongarch_regs; >+ >+/* Return values for calls from PLT on LoongArch. */ >+typedef struct La_loongarch_retval >+{ >+ unsigned long int lrv_a0; >+ unsigned long int lrv_a1; >+ double lrv_fa0; >+ double lrv_fa1; >+} La_loongarch_retval; >+ >+__BEGIN_DECLS >+ >+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, >+ unsigned int __ndx, >+ uintptr_t *__refcook, >+ uintptr_t *__defcook, >+ La_loongarch_regs *__regs, >+ unsigned int *__flags, >+ const char *__symname, >+ long int *__framesizep); >+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, >+ unsigned int __ndx, >+ uintptr_t *__refcook, >+ uintptr_t *__defcook, >+ const La_loongarch_regs *__inregs, >+ La_loongarch_retval *__outregs, >+ const char *__symname); >+ >+__END_DECLS >diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h >new file mode 100644 >index 0000000000..8b323ad2b6 >--- /dev/null >+++ b/sysdeps/loongarch/bits/setjmp.h >@@ -0,0 +1,42 @@ >+/* Define the machine-dependent type `jmp_buf'. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#ifndef _LOONGARCH_BITS_SETJMP_H >+#define _LOONGARCH_BITS_SETJMP_H >+ >+typedef struct __jmp_buf_internal_tag >+{ >+ /* Program counter. */ >+ long int __pc; >+ /* Stack pointer. */ >+ long int __sp; >+ /* Reserved */ >+ long int __x; >+ /* Frame pointer. */ >+ long int __fp; >+ /* Callee-saved registers. */ >+ long int __regs[9]; >+ >+#ifndef __loongarch_soft_float >+ /* Callee-saved floating point registers. */ >+ double __fpregs[8]; >+#endif >+ >+} __jmp_buf[1]; >+ >+#endif /* _LOONGARCH_BITS_SETJMP_H */ >diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c >new file mode 100644 >index 0000000000..32f49441c3 >--- /dev/null >+++ b/sysdeps/loongarch/bsd-_setjmp.c >@@ -0,0 +1 @@ >+/* _setjmp is implemented in setjmp.S. */ >diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c >new file mode 100644 >index 0000000000..45fd802aac >--- /dev/null >+++ b/sysdeps/loongarch/bsd-setjmp.c >@@ -0,0 +1 @@ >+/* setjmp is implemented in setjmp.S. */ >diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h >new file mode 100644 >index 0000000000..4e19ad9319 >--- /dev/null >+++ b/sysdeps/loongarch/dl-machine.h >@@ -0,0 +1,307 @@ >+/* Machine-dependent ELF dynamic relocation inline functions. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#ifndef dl_machine_h >+#define dl_machine_h >+ >+#define ELF_MACHINE_NAME "LoongArch" >+ >+#include <entry.h> >+#include <elf/elf.h> >+#include <sys/asm.h> >+#include <dl-tls.h> >+#include <dl-static-tls.h> >+#include <dl-machine-rel.h> >+ >+#ifndef _RTLD_PROLOGUE >+# define _RTLD_PROLOGUE(entry) \ >+ ".globl\t" __STRING (entry) "\n\t" \ >+ ".type\t" __STRING (entry) ", @function\n\t" \ >+ CFI_STARTPROC "\n" \ >+ __STRING (entry) ":\n" >+#endif >+ >+#ifndef _RTLD_EPILOGUE >+# define _RTLD_EPILOGUE(entry) \ >+ CFI_ENDPROC "\n\t" \ >+ ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" >+#endif >+ >+#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT >+#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE >+ >+#define elf_machine_type_class(type) \ >+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list seems an unneeded hack for many ports. Can you check does loongarch really need them? >+ | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) >+ >+#define ELF_MACHINE_NO_REL 1 >+#define ELF_MACHINE_NO_RELA 0 >+ >+/* Return nonzero iff ELF header is compatible with the running host. */ >+static inline int >+elf_machine_matches_host (const ElfW (Ehdr) * ehdr) >+{ >+ /* We can only run LoongArch binaries. */ >+ if (ehdr->e_machine != EM_LOONGARCH) >+ return 0; >+ >+ return 1; >+} >+ >+/* Return the run-time load address of the shared object. */ >+static inline ElfW (Addr) elf_machine_load_address (void) >+{ >+ extern const ElfW(Ehdr) __ehdr_start attribute_hidden; >+ return (ElfW(Addr)) &__ehdr_start; >+} >+ >+/* Return the link-time address of _DYNAMIC. */ >+static inline ElfW (Addr) elf_machine_dynamic (void) >+{ >+ extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; >+ return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); >+} >+ >+/* Initial entry point code for the dynamic linker. >+ The C function `_dl_start' is the real entry point; >+ its return value is the user program's entry point. */ >+ >+#define RTLD_START \ >+ asm(".text\n\ >+ " _RTLD_PROLOGUE (ENTRY_POINT) "\ >+ .cfi_label .Ldummy \n\ >+ " CFI_UNDEFINED (1) " \n\ >+ or $a0, $sp, $zero \n\ >+ bl _dl_start \n\ >+ # Stash user entry point in s0. \n\ >+ or $s0, $v0, $zero \n\ >+ # Load the original argument count. \n\ >+ ld.d $a1, $sp, 0 \n\ >+ # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ >+ char **env) \n\ >+ la $a0, _rtld_local \n\ >+ ld.d $a0, $a0, 0 \n\ >+ addi.d $a2, $sp, 8 \n\ >+ slli.d $a3, $a1, 3 \n\ >+ add.d $a3, $a3, $a2 \n\ >+ addi.d $a3, $a3, 8 \n\ The _dl_init seems much more complex than the riscv counterpart. >+ # Adjust $sp for 16-aligned \n\ >+ srli.d $t0, $sp, 4 \n\ >+ slli.d $t0, $t0, 4 \n\ >+ ori $t1, $sp, 0 \n\ >+ addi.d $sp, $t0, -32 \n\ >+ st.d $t1, $sp, 24 \n\ Seems too complex. >+ # Call the function to run the initializers. \n\ >+ bl _dl_init \n\ >+ # Pass our finalizer function to _start. \n\ >+ ld.d $sp, $sp, 24 \n\ >+ la $a0, _dl_fini \n\ >+ # Jump to the user entry point. \n\ >+ jirl $zero, $s0, 0 \n\ >+ " _RTLD_EPILOGUE (ENTRY_POINT) "\ >+ .previous"); >+ >+/* Names of the architecture-specific auditing callback functions. */ >+#define ARCH_LA_PLTENTER loongarch_gnu_pltenter >+#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit >+ >+/* Bias .got.plt entry by the offset requested by the PLT header. */ >+#define elf_machine_plt_value(map, reloc, value) (value) >+ >+static inline ElfW (Addr) >+elf_machine_fixup_plt (struct link_map *map, lookup_t t, >+ const ElfW (Sym) * refsym, const ElfW (Sym) * sym, >+ const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, >+ ElfW (Addr) value) >+{ >+ return *reloc_addr = value; >+} >+ >+#endif /* !dl_machine_h */ >+ >+#ifdef RESOLVE_MAP >+ >+/* Perform a relocation described by R_INFO at the location pointed to >+ by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and >+ MAP is the object containing the reloc. */ >+ >+static inline void __attribute__ ((always_inline)) >+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >+ const ElfW (Rela) * reloc, >+ const ElfW (Sym) * sym, Seems excess space after `*` >+ const struct r_found_version *version, >+ void *const reloc_addr, int skip_ifunc) >+{ >+ ElfW (Addr) r_info = reloc->r_info; >+ const unsigned long int r_type = ELFW (R_TYPE) (r_info); >+ ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; >+ const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; >+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type); >+ ElfW (Addr) value = 0; >+ if (sym_map != NULL) >+ value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; >+ >+ if (sym != NULL >+ && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC) >+ && __glibc_likely (sym->st_shndx != SHN_UNDEF) >+ && __glibc_likely (!skip_ifunc)) >+ value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); >+ >+ switch (r_type) >+ { >+#ifndef RTLD_BOOTSTRAP >+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: >+ R_LARCH_TLS_DTPMOD32: >+ if (sym_map) >+ *addr_field = sym_map->l_tls_modid; >+ break; I know many ports do `if (sym_map)` but that seems (a) a workaround for possibly GNU ld bugs or (b) unneeded cargo cult. The check should better be removed. This applies to various TLS dynamic relocations below. >+ >+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: >+ R_LARCH_TLS_DTPREL32: >+ if (sym != NULL) >+ *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; >+ break; >+ >+ case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: >+ R_LARCH_TLS_TPREL32: >+ if (sym != NULL) >+ { >+ CHECK_STATIC_TLS (map, sym_map); >+ *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; >+ } >+ break; >+ >+ case R_LARCH_COPY: >+ { >+ if (sym == NULL) >+ /* This can happen in trace mode if an object could not be >+ found. */ >+ break; >+ if (__glibc_unlikely (sym->st_size > refsym->st_size) >+ || (__glibc_unlikely (sym->st_size < refsym->st_size) >+ && GLRO(dl_verbose))) >+ { >+ const char *strtab; >+ >+ strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); >+ _dl_error_printf ("\ >+%s: Symbol `%s' has different size in shared object, consider re-linking\n", >+ rtld_progname ?: "<program name unknown>", >+ strtab + refsym->st_name); >+ } >+ memcpy (reloc_addr, (void *) value, >+ MIN (sym->st_size, refsym->st_size)); >+ break; >+ } >+#endif >+ >+#if !defined RTLD_BOOTSTRAP >+ case R_LARCH_RELATIVE: >+ *addr_field = map->l_addr + reloc->r_addend; >+ break; >+#endif I think this is copied from riscv but its relocation code is probably not the best reference. sysdeps/m68k/dl-machine.h may be one of the better implementations for the relocation switch table. In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are needed in this function. There should be none of NONE, RELATIVE, IRELATIVE, absolute relocation types, etc (RELATIVE is handled elsewhere). GNU ld, in the presence of a bug, may produce spurious NONE relocations. Not handling NONE can catch some bugs. >+ case R_LARCH_JUMP_SLOT: >+ case __WORDSIZE == 64 ? R_LARCH_64: >+ R_LARCH_32: >+ *addr_field = value; >+ break; >+ >+ case R_LARCH_IRELATIVE: >+ value = map->l_addr + reloc->r_addend; >+ if (__glibc_likely (!skip_ifunc)) >+ value = ((ElfW (Addr) (*) (void)) value) (); >+ *addr_field = value; >+ break; >+ >+ case R_LARCH_NONE: >+ break; >+ >+ default: >+ _dl_reloc_bad_type (map, r_type, 0); >+ break; >+ } >+} >+ >+static inline void __attribute__ ((always_inline)) >+elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc, >+ void *const reloc_addr) >+{ >+ *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; >+} >+ >+static inline void __attribute__ ((always_inline)) >+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], >+ ElfW (Addr) l_addr, >+ const ElfW (Rela) * reloc, int skip_ifunc) >+{ >+ ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset); >+ const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); >+ >+ /* Check for unexpected PLT reloc type. */ >+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >+ { >+ if (__glibc_unlikely (map->l_mach.plt == 0)) >+ { >+ if (l_addr) >+ *reloc_addr += l_addr; >+ } >+ else >+ *reloc_addr = map->l_mach.plt; >+ } >+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) This is a design issue of ifunc for many ports. Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in .rela.plt, then you can remove this branch. >+ { >+ ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); >+ if (__glibc_likely (!skip_ifunc)) >+ value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); >+ *reloc_addr = (ElfW (Addr)) value; >+ } >+ else >+ _dl_reloc_bad_type (map, r_type, 1); >+} >+ >+/* Set up the loaded object described by L so its stub function >+ will jump to the on-demand fixup code __dl_runtime_resolve. */ >+ >+static inline int __attribute__ ((always_inline)) >+elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], >+ int lazy, int profile) >+{ >+#ifndef RTLD_BOOTSTRAP >+ /* If using PLTs, fill in the first two entries of .got.plt. */ >+ if (l->l_info[DT_JMPREL]) >+ { >+ extern void _dl_runtime_resolve (void) >+ __attribute__ ((visibility ("hidden"))); >+ ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]); >+ gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; >+ gotplt[1] = (ElfW (Addr)) l; >+ } >+#endif >+ >+ return lazy; >+} >+ >+#endif /* RESOLVE_MAP */ >diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S >new file mode 100644 >index 0000000000..eb610392f6 >--- /dev/null >+++ b/sysdeps/loongarch/dl-trampoline.S >@@ -0,0 +1,91 @@ >+/* PLT trampolines. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#include <sysdep.h> >+#include <sys/asm.h> >+ >+/* Assembler veneer called from the PLT header code for lazy loading. >+ The PLT header passes its own args in t0-t2. */ >+ >+#ifdef __loongarch_soft_float >+# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) >+#else >+# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) >+#endif >+ >+ENTRY (_dl_runtime_resolve) >+ >+ /* Save arguments to stack. */ >+ ADDI sp, sp, -FRAME_SIZE >+ >+ REG_S ra, sp, 9*SZREG >+ REG_S a0, sp, 1*SZREG >+ REG_S a1, sp, 2*SZREG >+ REG_S a2, sp, 3*SZREG >+ REG_S a3, sp, 4*SZREG >+ REG_S a4, sp, 5*SZREG >+ REG_S a5, sp, 6*SZREG >+ REG_S a6, sp, 7*SZREG >+ REG_S a7, sp, 8*SZREG >+ >+#ifndef __loongarch_soft_float >+ FREG_S fa0, sp, 10*SZREG + 0*SZFREG >+ FREG_S fa1, sp, 10*SZREG + 1*SZFREG >+ FREG_S fa2, sp, 10*SZREG + 2*SZFREG >+ FREG_S fa3, sp, 10*SZREG + 3*SZFREG >+ FREG_S fa4, sp, 10*SZREG + 4*SZFREG >+ FREG_S fa5, sp, 10*SZREG + 5*SZFREG >+ FREG_S fa6, sp, 10*SZREG + 6*SZFREG >+ FREG_S fa7, sp, 10*SZREG + 7*SZFREG >+#endif >+ >+ /* Update .got.plt and obtain runtime address of callee */ >+ SLLI a1, t1, 1 >+ or a0, t0, zero >+ ADD a1, a1, t1 >+ la a2, _dl_fixup >+ jirl ra, a2, 0 >+ or t1, v0, zero >+ >+ /* Restore arguments from stack. */ >+ REG_L ra, sp, 9*SZREG >+ REG_L a0, sp, 1*SZREG >+ REG_L a1, sp, 2*SZREG >+ REG_L a2, sp, 3*SZREG >+ REG_L a3, sp, 4*SZREG >+ REG_L a4, sp, 5*SZREG >+ REG_L a5, sp, 6*SZREG >+ REG_L a6, sp, 7*SZREG >+ REG_L a7, sp, 8*SZREG >+ >+#ifndef __loongarch_soft_float >+ FREG_L fa0, sp, 10*SZREG + 0*SZFREG >+ FREG_L fa1, sp, 10*SZREG + 1*SZFREG >+ FREG_L fa2, sp, 10*SZREG + 2*SZFREG >+ FREG_L fa3, sp, 10*SZREG + 3*SZFREG >+ FREG_L fa4, sp, 10*SZREG + 4*SZFREG >+ FREG_L fa5, sp, 10*SZREG + 5*SZFREG >+ FREG_L fa6, sp, 10*SZREG + 6*SZFREG >+ FREG_L fa7, sp, 10*SZREG + 7*SZFREG >+#endif >+ >+ ADDI sp, sp, FRAME_SIZE >+ >+ /* Invoke the callee. */ >+ jirl zero, t1, 0 >+END (_dl_runtime_resolve) >diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h >new file mode 100644 >index 0000000000..a4b8ea690e >--- /dev/null >+++ b/sysdeps/loongarch/jmpbuf-offsets.h >@@ -0,0 +1,22 @@ >+/* Private macros for accessing __jmp_buf contents. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public License as >+ published by the Free Software Foundation; either version 2.1 of the >+ License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#include <jmpbuf-unwind.h> >+ >+/* Helper for generic ____longjmp_chk(). */ >+#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) >diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h >new file mode 100644 >index 0000000000..6fa509151d >--- /dev/null >+++ b/sysdeps/loongarch/jmpbuf-unwind.h >@@ -0,0 +1,45 @@ >+/* Examine __jmp_buf for unwinding frames. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#include <setjmp.h> >+#include <stdint.h> >+#include <unwind.h> >+#include <sysdep.h> >+ >+/* Test if longjmp to JMPBUF would unwind the frame >+ containing a local variable at ADDRESS. */ >+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ >+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) >+ >+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ >+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj) >+ >+static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs) >+{ >+ uintptr_t sp = regs[0].__sp; >+#ifdef PTR_DEMANGLE >+ PTR_DEMANGLE (sp); >+#endif >+ return sp; >+} >+ >+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ >+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) >+ >+/* We use the normal longjmp for unwinding. */ >+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) >diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h >new file mode 100644 >index 0000000000..36b1b25b9f >--- /dev/null >+++ b/sysdeps/loongarch/ldsodefs.h >@@ -0,0 +1,41 @@ >+/* Run-time dynamic linker data structures for loaded ELF shared objects. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#ifndef _LOONGARCH_LDSODEFS_H >+#define _LOONGARCH_LDSODEFS_H 1 >+ >+#include <elf.h> >+ >+struct La_loongarch_regs; >+struct La_loongarch_retval; >+ >+#define ARCH_PLTENTER_MEMBERS \ >+ ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \ >+ uintptr_t *, uintptr_t *, \ >+ const struct La_loongarch_regs *, \ >+ unsigned int *, const char *name, \ >+ long int *framesizep); >+ >+#define ARCH_PLTEXIT_MEMBERS \ >+ unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \ >+ uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ >+ struct La_loongarch_retval *, const char *); >+ >+#include_next <ldsodefs.h> >+ >+#endif >diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h >new file mode 100644 >index 0000000000..bbba73ed70 >--- /dev/null >+++ b/sysdeps/loongarch/linkmap.h >@@ -0,0 +1,22 @@ >+/* Definition of link_map_machine. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+struct link_map_machine >+{ >+ ElfW (Addr) plt; /* Address of .plt. */ >+}; >diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h >new file mode 100644 >index 0000000000..4a3cdd964e >--- /dev/null >+++ b/sysdeps/loongarch/machine-gmon.h >@@ -0,0 +1,37 @@ >+/* LoongArch definitions for profiling support. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library; if not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+/* Accept 'frompc' address as argument from the function that calls >+ _mcount for profiling. Use __builtin_return_address (0) >+ for the 'selfpc' address. */ >+ >+#include <sysdep.h> >+ >+static void mcount_internal (unsigned long int frompc, >+ unsigned long int selfpc); >+ >+#define _MCOUNT_DECL(frompc, selfpc) \ >+ static inline void mcount_internal (unsigned long int frompc, \ >+ unsigned long int selfpc) >+ >+#define MCOUNT \ >+ void _mcount (void *frompc) \ >+ { \ >+ mcount_internal ((unsigned long int) frompc, \ >+ (unsigned long int) RETURN_ADDRESS (0)); \ >+ } >diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S >new file mode 100644 >index 0000000000..b93ae2f5da >--- /dev/null >+++ b/sysdeps/loongarch/setjmp.S >@@ -0,0 +1,66 @@ >+/* setjmp for LoongArch. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#include <sysdep.h> >+#include <sys/asm.h> >+ >+ENTRY (_setjmp) >+ li.w a1,0 >+ b __sigsetjmp >+END (_setjmp) >+ >+ENTRY (setjmp) >+ li.w a1,1 >+END (setjmp) >+ >+ENTRY (__sigsetjmp) >+ REG_S ra, a0, 0*SZREG >+ REG_S sp, a0, 1*SZREG >+ REG_S x, a0, 2*SZREG >+ REG_S fp, a0, 3*SZREG >+ REG_S s0, a0, 4*SZREG >+ REG_S s1, a0, 5*SZREG >+ REG_S s2, a0, 6*SZREG >+ REG_S s3, a0, 7*SZREG >+ REG_S s4, a0, 8*SZREG >+ REG_S s5, a0, 9*SZREG >+ REG_S s6, a0, 10*SZREG >+ REG_S s7, a0, 11*SZREG >+ REG_S s8, a0, 12*SZREG >+ >+#ifndef __loongarch_soft_float >+ FREG_S $f24, a0, 13*SZREG + 0*SZFREG >+ FREG_S $f25, a0, 13*SZREG + 1*SZFREG >+ FREG_S $f26, a0, 13*SZREG + 2*SZFREG >+ FREG_S $f27, a0, 13*SZREG + 3*SZFREG >+ FREG_S $f28, a0, 13*SZREG + 4*SZFREG >+ FREG_S $f29, a0, 13*SZREG + 5*SZFREG >+ FREG_S $f30, a0, 13*SZREG + 6*SZFREG >+ FREG_S $f31, a0, 13*SZREG + 7*SZFREG >+#endif >+ >+#if !IS_IN (libc) && IS_IN(rtld) >+ li.w v0, 0 >+ jirl zero,ra,0 >+#else >+ b __sigjmp_save >+#endif >+END (__sigsetjmp) >+ >+hidden_def (__sigsetjmp) >+weak_alias (_setjmp, __GI__setjmp) >diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c >new file mode 100644 >index 0000000000..5b15f4815a >--- /dev/null >+++ b/sysdeps/loongarch/sotruss-lib.c >@@ -0,0 +1,50 @@ >+/* Override generic sotruss-lib.c to define actual functions for LoongArch. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#define HAVE_ARCH_PLTENTER >+#define HAVE_ARCH_PLTEXIT >+ >+#include <elf/sotruss-lib.c> >+ >+ElfW (Addr) >+la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), >+ unsigned int ndx __attribute__ ((unused)), >+ uintptr_t *refcook, uintptr_t *defcook, >+ La_loongarch_regs *regs, unsigned int *flags, >+ const char *symname, long int *framesizep) >+{ >+ print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1], >+ regs->lr_reg[2], *flags); >+ >+ /* No need to copy anything, we will not need the parameters in any case. */ >+ *framesizep = 0; >+ >+ return sym->st_value; >+} >+ >+unsigned int >+la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, >+ uintptr_t *refcook, uintptr_t *defcook, >+ const struct La_loongarch_regs *inregs, >+ struct La_loongarch_retval *outregs, >+ const char *symname) >+{ >+ print_exit (refcook, defcook, symname, outregs->lrv_a0); >+ >+ return 0; >+} >diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S >new file mode 100644 >index 0000000000..a9b32aa966 >--- /dev/null >+++ b/sysdeps/loongarch/start.S >@@ -0,0 +1,67 @@ >+/* Startup code compliant to the ELF LoongArch ABI. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#define __ASSEMBLY__ 1 >+#include <entry.h> >+#include <sys/asm.h> >+ >+/* The entry point's job is to call __libc_start_main. Per the ABI, >+ a0 contains the address of a function to be passed to atexit. >+ __libc_start_main wants this in a5. */ >+ >+/* >+int >+__libc_start_main (int (*main) (int, char **, char **), >+ int argc, >+ char **argv, >+ __typeof (main) init, >+ void (*fini) (void), >+ void (*rtld_fini) (void), >+ void *stack_end); >+ */ >+ >+ENTRY (ENTRY_POINT) >+ >+/* Terminate call stack by noting ra is undefined. Use a dummy >+ .cfi_label to force starting the FDE. */ >+ .cfi_label .Ldummy >+ cfi_undefined (1) >+ or a5, a0, zero /* rtld_fini */ >+ >+/* We must get symbol main through GOT table, since main may not be local. >+ For instance: googletest defines main in dynamic library. */ >+ la.got a0, t0, main >+ REG_L a1, sp, 0 >+ ADDI a2, sp, SZREG >+ >+ /* Adjust $sp for 16-aligned */ >+ SRLI sp, sp, 4 >+ SLLI sp, sp, 4 >+ >+ move a3, zero /* used to be init */ >+ move a4, zero /* used to be fini */ >+ or a6, sp, zero /* stack_end */ >+ >+ la.got ra, t0, __libc_start_main >+ jirl ra, ra, 0 >+ >+ la.got ra, t0, abort >+ jirl ra, ra, 0 >+END (ENTRY_POINT) >+ >diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h >new file mode 100644 >index 0000000000..b41ee59694 >--- /dev/null >+++ b/sysdeps/loongarch/sys/asm.h >@@ -0,0 +1,59 @@ >+/* Miscellaneous macros. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#ifndef _SYS_ASM_H >+#define _SYS_ASM_H >+ >+#include <sys/regdef.h> >+#include <sysdeps/generic/sysdep.h> >+ >+/* Macros to handle different pointer/register sizes for 32/64-bit code. */ >+#define SZREG 8 >+#define SZFREG 8 >+#define REG_L ld.d >+#define REG_S st.d >+#define SRLI srli.d >+#define SLLI slli.d >+#define ADDI addi.d >+#define ADD add.d >+#define BSTRINS bstrins.d >+#define LI li.d >+#define FREG_L fld.d >+#define FREG_S fst.d >+ >+/* Declare leaf routine. */ >+#define LEAF(symbol) \ >+ .text; \ >+ .globl symbol; \ >+ .align 3; \ >+ cfi_startproc; \ >+ .type symbol, @function; \ >+ symbol: >+ >+#define ENTRY(symbol) LEAF (symbol) >+ >+/* Mark end of function. */ >+#undef END >+#define END(function) \ >+ cfi_endproc; \ >+ .size function, .- function; >+ >+/* Stack alignment. */ >+#define ALMASK ~15 >+ >+#endif /* sys/asm.h */ >diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h >new file mode 100644 >index 0000000000..e71948c86e >--- /dev/null >+++ b/sysdeps/loongarch/tst-audit.h >@@ -0,0 +1,23 @@ >+/* Definitions for testing PLT entry/exit auditing. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <https://www.gnu.org/licenses/>. */ >+ >+#define pltenter la_loongarch_gnu_pltenter >+#define pltexit la_loongarch_gnu_pltexit >+#define La_regs La_loongarch_regs >+#define La_retval La_loongarch_retval >+#define int_retval lrv_a0 >diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >new file mode 100644 >index 0000000000..4887c30ca2 >--- /dev/null >+++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >@@ -0,0 +1,26 @@ >+/* ldconfig default paths and libraries. >+ Copyright (C) 2022 Free Software Foundation, Inc. >+ This file is part of the GNU C Library. >+ >+ The GNU C Library is free software; you can redistribute it and/or >+ modify it under the terms of the GNU Lesser General Public >+ License as published by the Free Software Foundation; either >+ version 2.1 of the License, or (at your option) any later version. >+ >+ The GNU C Library is distributed in the hope that it will be useful, >+ but WITHOUT ANY WARRANTY; without even the implied warranty of >+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >+ Lesser General Public License for more details. >+ >+ You should have received a copy of the GNU Lesser General Public >+ License along with the GNU C Library. If not, see >+ <http://www.gnu.org/licenses/>. */ >+ >+#include <sysdeps/generic/ldconfig.h> >+ >+#define SYSDEP_KNOWN_INTERPRETER_NAMES \ >+ { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, >+ >+#define SYSDEP_KNOWN_LIBRARY_NAMES \ >+ { "libc.so.6", FLAG_ELF_LIBC6 }, \ >+ { "libm.so.6", FLAG_ELF_LIBC6 }, >-- >2.31.1 >
+ +#define elf_machine_type_class(type) \ + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list seems an unneeded hack for many ports. Can you check does loongarch really need them? *Removed*. *>>>>>>>>>>>>>>>* diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h index 3beaaee117..500fe71a7e 100644 --- a/sysdeps/loongarch/dl-machine.h +++ b/sysdeps/loongarch/dl-machine.h @@ -47,13 +47,7 @@ #define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE #define elf_machine_type_class(type) \ - ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT \ - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ + ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT)) \ | (ELF_RTYPE_CLASS_COPY *((type) == R_LARCH_COPY))) #define ELF_MACHINE_NO_REL 1 *<<<<<<<<<<<<<<<<<<* * * +#define RTLD_START \ + asm(".text\n\ + " _RTLD_PROLOGUE (ENTRY_POINT) "\ + .cfi_label .Ldummy \n\ + " CFI_UNDEFINED (1) " \n\ + or $a0, $sp, $zero \n\ + bl _dl_start \n\ + # Stash user entry point in s0. \n\ + or $s0, $v0, $zero \n\ + # Load the original argument count. \n\ + ld.d $a1, $sp, 0 \n\ + # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ + char **env) \n\ + la $a0, _rtld_local \n\ + ld.d $a0, $a0, 0 \n\ + addi.d $a2, $sp, 8 \n\ + slli.d $a3, $a1, 3 \n\ + add.d $a3, $a3, $a2 \n\ + addi.d $a3, $a3, 8 \n\ The _dl_init seems much more complex than the riscv counterpart. *There is no need to simplify further.* >>>>>>>>>>>>>>>>>> loongarch: 96 # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ 97 char **env) \n\ * 98 la $a0, _rtld_local \n\ 99 ld.d $a0, $a0, 0 \n\ * *100 addi.d $a2, $sp, 8 \n\ ** **101 slli.d $a3, $a1, 3 \n\ ** **102 add.d $a3, $a3, $a2 \n\ ** **103 addi.d $a3, $a3, 8 \n\* 104 # Stash the stack pointer in s1.\n\ riscv: 112 # Call _dl_init (struct link_map *main_map, int argc, char **argv, char **env) \n\ *113 " STRINGXP (REG_L) " a0, _rtld_local\n\* *114 add a2, sp, " STRINGXP (SZREG) "\n\** **115 sll a3, a1, " STRINGXP (PTRLOG) "\n\** **116 add a3, a3, a2\n\** **117 add a3, a3, " STRINGXP (SZREG) "\n\* 118 # Stash the stack pointer in s1.\n\ <<<<<<<<<<<<<< > + # Adjust $sp for 16-aligned \n\ > + srli.d $t0, $sp, 4 \n\ > + slli.d $t0, $t0, 4 \n\ > + ori $t1, $sp, 0 \n\ > + addi.d $sp, $t0, -32 \n\ > + st.d $t1, $sp, 24 \n\ Seems too complex. *Fixed.* *>>>>>>>>>>>>>>>>>>>* *diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h index 500fe71a7e..6ec9a403d3 100644 --- a/sysdeps/loongarch/dl-machine.h +++ b/sysdeps/loongarch/dl-machine.h @@ -101,16 +101,15 @@ static inline ElfW (Addr) elf_machine_dynamic (void) slli.d $a3, $a1, 3 \n\ add.d $a3, $a3, $a2 \n\ addi.d $a3, $a3, 8 \n\ + # Stash the stack pointer in s1.\n\ + or $s1, $sp, $zero \n\ # Adjust $sp for 16-aligned \n\ - srli.d $t0, $sp, 4 \n\ - slli.d $t0, $t0, 4 \n\ - ori $t1, $sp, 0 \n\ - addi.d $sp, $t0, -32 \n\ - st.d $t1, $sp, 24 \n\ + bstrins.d $sp, $zero, 3, 0 \n\ # Call the function to run the initializers. \n\ bl _dl_init \n\ + # Restore the stack pointer for _start.\n\ + or $sp, $s1, $zero \n\ # Pass our finalizer function to _start. \n\ - ld.d $sp, $sp, 24 \n\ la $a0, _dl_fini \n\ # Jump to the user entry point. \n\ jirl $zero, $s0, 0 \n\ * *<<<<<<<<<<<<<<<<<<* +static inline void __attribute__ ((always_inline)) +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], + const ElfW (Rela) * reloc, + const ElfW (Sym) * sym, Seems excess space after `*` *Fixed all same problems.* + /* Check for unexpected PLT reloc type. */ + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) + { + if (__glibc_unlikely (map->l_mach.plt == 0)) + { + if (l_addr) + *reloc_addr += l_addr; + } + else + *reloc_addr = map->l_mach.plt; + } + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) This is a design issue of ifunc for many ports. Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in .rela.plt, then you can remove this branch. *Definitely, for riscv, x86 and aarch64..., there are **R_*_IRELATIVEs in their **.rela.plt.* *But I don't understand why "Ideally R_*_IRELATIVE relocations are only in .rela.dyn"?* *Could you explain it?* *or we just keep it now? * *Thanks.* * * 在 2022/6/6 上午7:55, Fangrui Song 写道: > On 2022-06-01, caiyinyu wrote: >> --- >> sysdeps/loongarch/__longjmp.S | 52 ++++ >> sysdeps/loongarch/bits/endianness.h | 11 + >> sysdeps/loongarch/bits/link.h | 58 ++++ >> sysdeps/loongarch/bits/setjmp.h | 42 +++ >> sysdeps/loongarch/bsd-_setjmp.c | 1 + >> sysdeps/loongarch/bsd-setjmp.c | 1 + >> sysdeps/loongarch/dl-machine.h | 307 +++++++++++++++++++ >> sysdeps/loongarch/dl-trampoline.S | 91 ++++++ >> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++ >> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++ >> sysdeps/loongarch/ldsodefs.h | 41 +++ >> sysdeps/loongarch/linkmap.h | 22 ++ >> sysdeps/loongarch/machine-gmon.h | 37 +++ >> sysdeps/loongarch/setjmp.S | 66 ++++ >> sysdeps/loongarch/sotruss-lib.c | 50 +++ >> sysdeps/loongarch/start.S | 67 ++++ >> sysdeps/loongarch/sys/asm.h | 59 ++++ >> sysdeps/loongarch/tst-audit.h | 23 ++ >> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++ >> 19 files changed, 1021 insertions(+) >> create mode 100644 sysdeps/loongarch/__longjmp.S >> create mode 100644 sysdeps/loongarch/bits/endianness.h >> create mode 100644 sysdeps/loongarch/bits/link.h >> create mode 100644 sysdeps/loongarch/bits/setjmp.h >> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c >> create mode 100644 sysdeps/loongarch/bsd-setjmp.c >> create mode 100644 sysdeps/loongarch/dl-machine.h >> create mode 100644 sysdeps/loongarch/dl-trampoline.S >> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h >> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h >> create mode 100644 sysdeps/loongarch/ldsodefs.h >> create mode 100644 sysdeps/loongarch/linkmap.h >> create mode 100644 sysdeps/loongarch/machine-gmon.h >> create mode 100644 sysdeps/loongarch/setjmp.S >> create mode 100644 sysdeps/loongarch/sotruss-lib.c >> create mode 100644 sysdeps/loongarch/start.S >> create mode 100644 sysdeps/loongarch/sys/asm.h >> create mode 100644 sysdeps/loongarch/tst-audit.h >> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> >> diff --git a/sysdeps/loongarch/__longjmp.S >> b/sysdeps/loongarch/__longjmp.S >> new file mode 100644 >> index 0000000000..b7690dd94f >> --- /dev/null >> +++ b/sysdeps/loongarch/__longjmp.S >> @@ -0,0 +1,52 @@ >> +/* longjmp. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <sysdep.h> >> +#include <sys/asm.h> >> + >> +ENTRY (__longjmp) >> + REG_L ra, a0, 0*SZREG >> + REG_L sp, a0, 1*SZREG >> + REG_L x, a0, 2*SZREG >> + REG_L fp, a0, 3*SZREG >> + REG_L s0, a0, 4*SZREG >> + REG_L s1, a0, 5*SZREG >> + REG_L s2, a0, 6*SZREG >> + REG_L s3, a0, 7*SZREG >> + REG_L s4, a0, 8*SZREG >> + REG_L s5, a0, 9*SZREG >> + REG_L s6, a0, 10*SZREG >> + REG_L s7, a0, 11*SZREG >> + REG_L s8, a0, 12*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_L $f24, a0, 13*SZREG + 0*SZFREG >> + FREG_L $f25, a0, 13*SZREG + 1*SZFREG >> + FREG_L $f26, a0, 13*SZREG + 2*SZFREG >> + FREG_L $f27, a0, 13*SZREG + 3*SZFREG >> + FREG_L $f28, a0, 13*SZREG + 4*SZFREG >> + FREG_L $f29, a0, 13*SZREG + 5*SZFREG >> + FREG_L $f30, a0, 13*SZREG + 6*SZFREG >> + FREG_L $f31, a0, 13*SZREG + 7*SZFREG >> +#endif >> + >> + sltui a0,a1,1 >> + ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 >> + jirl zero,ra,0 >> + >> +END (__longjmp) >> diff --git a/sysdeps/loongarch/bits/endianness.h >> b/sysdeps/loongarch/bits/endianness.h >> new file mode 100644 >> index 0000000000..7290be7b18 >> --- /dev/null >> +++ b/sysdeps/loongarch/bits/endianness.h >> @@ -0,0 +1,11 @@ >> +#ifndef _BITS_ENDIANNESS_H >> +#define _BITS_ENDIANNESS_H 1 >> + >> +#ifndef _BITS_ENDIAN_H >> +#error "Never use <bits/endianness.h> directly; include <endian.h> >> instead." >> +#endif >> + >> +/* LoongArch is little-endian. */ >> +#define __BYTE_ORDER __LITTLE_ENDIAN >> + >> +#endif /* bits/endianness.h */ >> diff --git a/sysdeps/loongarch/bits/link.h >> b/sysdeps/loongarch/bits/link.h >> new file mode 100644 >> index 0000000000..4df09989cb >> --- /dev/null >> +++ b/sysdeps/loongarch/bits/link.h >> @@ -0,0 +1,58 @@ >> +/* Machine-specific declarations for dynamic linker interface. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _LINK_H >> +#error "Never include <bits/link.h> directly; use <link.h> instead." >> +#endif >> + >> +typedef struct La_loongarch_regs >> +{ >> + unsigned long int lr_reg[8]; /* a0 - a7 */ >> + double lr_fpreg[8]; /* fa0 - fa7 */ >> + unsigned long int lr_ra; >> + unsigned long int lr_sp; >> +} La_loongarch_regs; >> + >> +/* Return values for calls from PLT on LoongArch. */ >> +typedef struct La_loongarch_retval >> +{ >> + unsigned long int lrv_a0; >> + unsigned long int lrv_a1; >> + double lrv_fa0; >> + double lrv_fa1; >> +} La_loongarch_retval; >> + >> +__BEGIN_DECLS >> + >> +extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, >> + unsigned int __ndx, >> + uintptr_t *__refcook, >> + uintptr_t *__defcook, >> + La_loongarch_regs *__regs, >> + unsigned int *__flags, >> + const char *__symname, >> + long int *__framesizep); >> +extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, >> + unsigned int __ndx, >> + uintptr_t *__refcook, >> + uintptr_t *__defcook, >> + const La_loongarch_regs *__inregs, >> + La_loongarch_retval *__outregs, >> + const char *__symname); >> + >> +__END_DECLS >> diff --git a/sysdeps/loongarch/bits/setjmp.h >> b/sysdeps/loongarch/bits/setjmp.h >> new file mode 100644 >> index 0000000000..8b323ad2b6 >> --- /dev/null >> +++ b/sysdeps/loongarch/bits/setjmp.h >> @@ -0,0 +1,42 @@ >> +/* Define the machine-dependent type `jmp_buf'. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _LOONGARCH_BITS_SETJMP_H >> +#define _LOONGARCH_BITS_SETJMP_H >> + >> +typedef struct __jmp_buf_internal_tag >> +{ >> + /* Program counter. */ >> + long int __pc; >> + /* Stack pointer. */ >> + long int __sp; >> + /* Reserved */ >> + long int __x; >> + /* Frame pointer. */ >> + long int __fp; >> + /* Callee-saved registers. */ >> + long int __regs[9]; >> + >> +#ifndef __loongarch_soft_float >> + /* Callee-saved floating point registers. */ >> + double __fpregs[8]; >> +#endif >> + >> +} __jmp_buf[1]; >> + >> +#endif /* _LOONGARCH_BITS_SETJMP_H */ >> diff --git a/sysdeps/loongarch/bsd-_setjmp.c >> b/sysdeps/loongarch/bsd-_setjmp.c >> new file mode 100644 >> index 0000000000..32f49441c3 >> --- /dev/null >> +++ b/sysdeps/loongarch/bsd-_setjmp.c >> @@ -0,0 +1 @@ >> +/* _setjmp is implemented in setjmp.S. */ >> diff --git a/sysdeps/loongarch/bsd-setjmp.c >> b/sysdeps/loongarch/bsd-setjmp.c >> new file mode 100644 >> index 0000000000..45fd802aac >> --- /dev/null >> +++ b/sysdeps/loongarch/bsd-setjmp.c >> @@ -0,0 +1 @@ >> +/* setjmp is implemented in setjmp.S. */ >> diff --git a/sysdeps/loongarch/dl-machine.h >> b/sysdeps/loongarch/dl-machine.h >> new file mode 100644 >> index 0000000000..4e19ad9319 >> --- /dev/null >> +++ b/sysdeps/loongarch/dl-machine.h >> @@ -0,0 +1,307 @@ >> +/* Machine-dependent ELF dynamic relocation inline functions. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef dl_machine_h >> +#define dl_machine_h >> + >> +#define ELF_MACHINE_NAME "LoongArch" >> + >> +#include <entry.h> >> +#include <elf/elf.h> >> +#include <sys/asm.h> >> +#include <dl-tls.h> >> +#include <dl-static-tls.h> >> +#include <dl-machine-rel.h> >> + >> +#ifndef _RTLD_PROLOGUE >> +# define _RTLD_PROLOGUE(entry) \ >> + ".globl\t" __STRING (entry) "\n\t" \ >> + ".type\t" __STRING (entry) ", @function\n\t" \ >> + CFI_STARTPROC "\n" \ >> + __STRING (entry) ":\n" >> +#endif >> + >> +#ifndef _RTLD_EPILOGUE >> +# define _RTLD_EPILOGUE(entry) \ >> + CFI_ENDPROC "\n\t" \ >> + ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" >> +#endif >> + >> +#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT >> +#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE >> + >> +#define elf_machine_type_class(type) \ >> + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ > > Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list > seems an unneeded hack for many ports. Can you check does loongarch > really need them? > >> + | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) >> + >> +#define ELF_MACHINE_NO_REL 1 >> +#define ELF_MACHINE_NO_RELA 0 >> + >> +/* Return nonzero iff ELF header is compatible with the running >> host. */ >> +static inline int >> +elf_machine_matches_host (const ElfW (Ehdr) * ehdr) >> +{ >> + /* We can only run LoongArch binaries. */ >> + if (ehdr->e_machine != EM_LOONGARCH) >> + return 0; >> + >> + return 1; >> +} >> + >> +/* Return the run-time load address of the shared object. */ >> +static inline ElfW (Addr) elf_machine_load_address (void) >> +{ >> + extern const ElfW(Ehdr) __ehdr_start attribute_hidden; >> + return (ElfW(Addr)) &__ehdr_start; >> +} >> + >> +/* Return the link-time address of _DYNAMIC. */ >> +static inline ElfW (Addr) elf_machine_dynamic (void) >> +{ >> + extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; >> + return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); >> +} >> + >> +/* Initial entry point code for the dynamic linker. >> + The C function `_dl_start' is the real entry point; >> + its return value is the user program's entry point. */ >> + >> +#define RTLD_START \ >> + asm(".text\n\ >> + " _RTLD_PROLOGUE (ENTRY_POINT) "\ >> + .cfi_label .Ldummy \n\ >> + " CFI_UNDEFINED (1) " \n\ >> + or $a0, $sp, $zero \n\ >> + bl _dl_start \n\ >> + # Stash user entry point in s0. \n\ >> + or $s0, $v0, $zero \n\ >> + # Load the original argument count. \n\ >> + ld.d $a1, $sp, 0 \n\ >> + # Call _dl_init (struct link_map *main_map, int argc, char >> **argv, \ >> + char **env) \n\ >> + la $a0, _rtld_local \n\ >> + ld.d $a0, $a0, 0 \n\ >> + addi.d $a2, $sp, 8 \n\ >> + slli.d $a3, $a1, 3 \n\ >> + add.d $a3, $a3, $a2 \n\ >> + addi.d $a3, $a3, 8 \n\ > > The _dl_init seems much more complex than the riscv counterpart. > >> + # Adjust $sp for 16-aligned \n\ >> + srli.d $t0, $sp, 4 \n\ >> + slli.d $t0, $t0, 4 \n\ >> + ori $t1, $sp, 0 \n\ >> + addi.d $sp, $t0, -32 \n\ >> + st.d $t1, $sp, 24 \n\ > > Seems too complex. > >> + # Call the function to run the initializers. \n\ >> + bl _dl_init \n\ >> + # Pass our finalizer function to _start. \n\ >> + ld.d $sp, $sp, 24 \n\ >> + la $a0, _dl_fini \n\ >> + # Jump to the user entry point. \n\ >> + jirl $zero, $s0, 0 \n\ >> + " _RTLD_EPILOGUE (ENTRY_POINT) "\ >> + .previous"); >> + >> +/* Names of the architecture-specific auditing callback functions. */ >> +#define ARCH_LA_PLTENTER loongarch_gnu_pltenter >> +#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit >> + >> +/* Bias .got.plt entry by the offset requested by the PLT header. */ >> +#define elf_machine_plt_value(map, reloc, value) (value) >> + >> +static inline ElfW (Addr) >> +elf_machine_fixup_plt (struct link_map *map, lookup_t t, >> + const ElfW (Sym) * refsym, const ElfW (Sym) * sym, >> + const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, >> + ElfW (Addr) value) >> +{ >> + return *reloc_addr = value; >> +} >> + >> +#endif /* !dl_machine_h */ >> + >> +#ifdef RESOLVE_MAP >> + >> +/* Perform a relocation described by R_INFO at the location pointed to >> + by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and >> + MAP is the object containing the reloc. */ >> + >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >> + const ElfW (Rela) * reloc, >> + const ElfW (Sym) * sym, > > Seems excess space after `*` > >> + const struct r_found_version *version, >> + void *const reloc_addr, int skip_ifunc) >> +{ >> + ElfW (Addr) r_info = reloc->r_info; >> + const unsigned long int r_type = ELFW (R_TYPE) (r_info); >> + ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; >> + const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; >> + struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, >> r_type); >> + ElfW (Addr) value = 0; >> + if (sym_map != NULL) >> + value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; >> + >> + if (sym != NULL >> + && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == >> STT_GNU_IFUNC) >> + && __glibc_likely (sym->st_shndx != SHN_UNDEF) >> + && __glibc_likely (!skip_ifunc)) >> + value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); >> + >> + switch (r_type) >> + { >> +#ifndef RTLD_BOOTSTRAP >> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: >> + R_LARCH_TLS_DTPMOD32: >> + if (sym_map) >> + *addr_field = sym_map->l_tls_modid; >> + break; > > I know many ports do `if (sym_map)` but that seems (a) a workaround > for possibly > GNU ld bugs or (b) unneeded cargo cult. > > The check should better be removed. > > This applies to various TLS dynamic relocations below. > >> + >> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: >> + R_LARCH_TLS_DTPREL32: >> + if (sym != NULL) >> + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; >> + break; >> + >> + case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: >> + R_LARCH_TLS_TPREL32: >> + if (sym != NULL) >> + { >> + CHECK_STATIC_TLS (map, sym_map); >> + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; >> + } >> + break; >> + >> + case R_LARCH_COPY: >> + { >> + if (sym == NULL) >> + /* This can happen in trace mode if an object could not be >> + found. */ >> + break; >> + if (__glibc_unlikely (sym->st_size > refsym->st_size) >> + || (__glibc_unlikely (sym->st_size < refsym->st_size) >> + && GLRO(dl_verbose))) >> + { >> + const char *strtab; >> + >> + strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); >> + _dl_error_printf ("\ >> +%s: Symbol `%s' has different size in shared object, consider >> re-linking\n", >> + rtld_progname ?: "<program name unknown>", >> + strtab + refsym->st_name); >> + } >> + memcpy (reloc_addr, (void *) value, >> + MIN (sym->st_size, refsym->st_size)); >> + break; >> + } >> +#endif >> + >> +#if !defined RTLD_BOOTSTRAP >> + case R_LARCH_RELATIVE: >> + *addr_field = map->l_addr + reloc->r_addend; >> + break; >> +#endif > > I think this is copied from riscv but its relocation code is probably > not the best reference. sysdeps/m68k/dl-machine.h may be one of the > better implementations for the relocation switch table. > > In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are > needed in this function. There should be none of NONE, RELATIVE, > IRELATIVE, absolute relocation types, etc (RELATIVE is handled > elsewhere). > > GNU ld, in the presence of a bug, may produce spurious NONE relocations. > Not handling NONE can catch some bugs. > >> + case R_LARCH_JUMP_SLOT: >> + case __WORDSIZE == 64 ? R_LARCH_64: >> + R_LARCH_32: >> + *addr_field = value; >> + break; >> + >> + case R_LARCH_IRELATIVE: >> + value = map->l_addr + reloc->r_addend; >> + if (__glibc_likely (!skip_ifunc)) >> + value = ((ElfW (Addr) (*) (void)) value) (); >> + *addr_field = value; >> + break; >> + >> + case R_LARCH_NONE: >> + break; >> + >> + default: >> + _dl_reloc_bad_type (map, r_type, 0); >> + break; >> + } >> +} >> + >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * >> reloc, >> + void *const reloc_addr) >> +{ >> + *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; >> +} >> + >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem >> *scope[], >> + ElfW (Addr) l_addr, >> + const ElfW (Rela) * reloc, int skip_ifunc) >> +{ >> + ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset); >> + const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); >> + >> + /* Check for unexpected PLT reloc type. */ >> + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >> + { >> + if (__glibc_unlikely (map->l_mach.plt == 0)) >> + { >> + if (l_addr) >> + *reloc_addr += l_addr; >> + } >> + else >> + *reloc_addr = map->l_mach.plt; >> + } >> + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > > This is a design issue of ifunc for many ports. > Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in > .rela.plt, then you can remove this branch. > >> + { >> + ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); >> + if (__glibc_likely (!skip_ifunc)) >> + value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); >> + *reloc_addr = (ElfW (Addr)) value; >> + } >> + else >> + _dl_reloc_bad_type (map, r_type, 1); >> +} >> + >> +/* Set up the loaded object described by L so its stub function >> + will jump to the on-demand fixup code __dl_runtime_resolve. */ >> + >> +static inline int __attribute__ ((always_inline)) >> +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem >> *scope[], >> + int lazy, int profile) >> +{ >> +#ifndef RTLD_BOOTSTRAP >> + /* If using PLTs, fill in the first two entries of .got.plt. */ >> + if (l->l_info[DT_JMPREL]) >> + { >> + extern void _dl_runtime_resolve (void) >> + __attribute__ ((visibility ("hidden"))); >> + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, >> l_info[DT_PLTGOT]); >> + gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; >> + gotplt[1] = (ElfW (Addr)) l; >> + } >> +#endif >> + >> + return lazy; >> +} >> + >> +#endif /* RESOLVE_MAP */ >> diff --git a/sysdeps/loongarch/dl-trampoline.S >> b/sysdeps/loongarch/dl-trampoline.S >> new file mode 100644 >> index 0000000000..eb610392f6 >> --- /dev/null >> +++ b/sysdeps/loongarch/dl-trampoline.S >> @@ -0,0 +1,91 @@ >> +/* PLT trampolines. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <sysdep.h> >> +#include <sys/asm.h> >> + >> +/* Assembler veneer called from the PLT header code for lazy loading. >> + The PLT header passes its own args in t0-t2. */ >> + >> +#ifdef __loongarch_soft_float >> +# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) >> +#else >> +# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) >> +#endif >> + >> +ENTRY (_dl_runtime_resolve) >> + >> + /* Save arguments to stack. */ >> + ADDI sp, sp, -FRAME_SIZE >> + >> + REG_S ra, sp, 9*SZREG >> + REG_S a0, sp, 1*SZREG >> + REG_S a1, sp, 2*SZREG >> + REG_S a2, sp, 3*SZREG >> + REG_S a3, sp, 4*SZREG >> + REG_S a4, sp, 5*SZREG >> + REG_S a5, sp, 6*SZREG >> + REG_S a6, sp, 7*SZREG >> + REG_S a7, sp, 8*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_S fa0, sp, 10*SZREG + 0*SZFREG >> + FREG_S fa1, sp, 10*SZREG + 1*SZFREG >> + FREG_S fa2, sp, 10*SZREG + 2*SZFREG >> + FREG_S fa3, sp, 10*SZREG + 3*SZFREG >> + FREG_S fa4, sp, 10*SZREG + 4*SZFREG >> + FREG_S fa5, sp, 10*SZREG + 5*SZFREG >> + FREG_S fa6, sp, 10*SZREG + 6*SZFREG >> + FREG_S fa7, sp, 10*SZREG + 7*SZFREG >> +#endif >> + >> + /* Update .got.plt and obtain runtime address of callee */ >> + SLLI a1, t1, 1 >> + or a0, t0, zero >> + ADD a1, a1, t1 >> + la a2, _dl_fixup >> + jirl ra, a2, 0 >> + or t1, v0, zero >> + >> + /* Restore arguments from stack. */ >> + REG_L ra, sp, 9*SZREG >> + REG_L a0, sp, 1*SZREG >> + REG_L a1, sp, 2*SZREG >> + REG_L a2, sp, 3*SZREG >> + REG_L a3, sp, 4*SZREG >> + REG_L a4, sp, 5*SZREG >> + REG_L a5, sp, 6*SZREG >> + REG_L a6, sp, 7*SZREG >> + REG_L a7, sp, 8*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_L fa0, sp, 10*SZREG + 0*SZFREG >> + FREG_L fa1, sp, 10*SZREG + 1*SZFREG >> + FREG_L fa2, sp, 10*SZREG + 2*SZFREG >> + FREG_L fa3, sp, 10*SZREG + 3*SZFREG >> + FREG_L fa4, sp, 10*SZREG + 4*SZFREG >> + FREG_L fa5, sp, 10*SZREG + 5*SZFREG >> + FREG_L fa6, sp, 10*SZREG + 6*SZFREG >> + FREG_L fa7, sp, 10*SZREG + 7*SZFREG >> +#endif >> + >> + ADDI sp, sp, FRAME_SIZE >> + >> + /* Invoke the callee. */ >> + jirl zero, t1, 0 >> +END (_dl_runtime_resolve) >> diff --git a/sysdeps/loongarch/jmpbuf-offsets.h >> b/sysdeps/loongarch/jmpbuf-offsets.h >> new file mode 100644 >> index 0000000000..a4b8ea690e >> --- /dev/null >> +++ b/sysdeps/loongarch/jmpbuf-offsets.h >> @@ -0,0 +1,22 @@ >> +/* Private macros for accessing __jmp_buf contents. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> License as >> + published by the Free Software Foundation; either version 2.1 of the >> + License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <jmpbuf-unwind.h> >> + >> +/* Helper for generic ____longjmp_chk(). */ >> +#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) >> diff --git a/sysdeps/loongarch/jmpbuf-unwind.h >> b/sysdeps/loongarch/jmpbuf-unwind.h >> new file mode 100644 >> index 0000000000..6fa509151d >> --- /dev/null >> +++ b/sysdeps/loongarch/jmpbuf-unwind.h >> @@ -0,0 +1,45 @@ >> +/* Examine __jmp_buf for unwinding frames. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <setjmp.h> >> +#include <stdint.h> >> +#include <unwind.h> >> +#include <sysdep.h> >> + >> +/* Test if longjmp to JMPBUF would unwind the frame >> + containing a local variable at ADDRESS. */ >> +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ >> + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) >> + >> +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ >> + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), >> _adj) >> + >> +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp >> (__jmp_buf regs) >> +{ >> + uintptr_t sp = regs[0].__sp; >> +#ifdef PTR_DEMANGLE >> + PTR_DEMANGLE (sp); >> +#endif >> + return sp; >> +} >> + >> +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ >> + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) >> + >> +/* We use the normal longjmp for unwinding. */ >> +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) >> diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h >> new file mode 100644 >> index 0000000000..36b1b25b9f >> --- /dev/null >> +++ b/sysdeps/loongarch/ldsodefs.h >> @@ -0,0 +1,41 @@ >> +/* Run-time dynamic linker data structures for loaded ELF shared >> objects. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _LOONGARCH_LDSODEFS_H >> +#define _LOONGARCH_LDSODEFS_H 1 >> + >> +#include <elf.h> >> + >> +struct La_loongarch_regs; >> +struct La_loongarch_retval; >> + >> +#define ARCH_PLTENTER_MEMBERS \ >> + ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \ >> + uintptr_t *, uintptr_t *, \ >> + const struct La_loongarch_regs *, \ >> + unsigned int *, const char *name, \ >> + long int *framesizep); >> + >> +#define ARCH_PLTEXIT_MEMBERS \ >> + unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \ >> + uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ >> + struct La_loongarch_retval *, const char *); >> + >> +#include_next <ldsodefs.h> >> + >> +#endif >> diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h >> new file mode 100644 >> index 0000000000..bbba73ed70 >> --- /dev/null >> +++ b/sysdeps/loongarch/linkmap.h >> @@ -0,0 +1,22 @@ >> +/* Definition of link_map_machine. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +struct link_map_machine >> +{ >> + ElfW (Addr) plt; /* Address of .plt. */ >> +}; >> diff --git a/sysdeps/loongarch/machine-gmon.h >> b/sysdeps/loongarch/machine-gmon.h >> new file mode 100644 >> index 0000000000..4a3cdd964e >> --- /dev/null >> +++ b/sysdeps/loongarch/machine-gmon.h >> @@ -0,0 +1,37 @@ >> +/* LoongArch definitions for profiling support. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library; if not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +/* Accept 'frompc' address as argument from the function that calls >> + _mcount for profiling. Use __builtin_return_address (0) >> + for the 'selfpc' address. */ >> + >> +#include <sysdep.h> >> + >> +static void mcount_internal (unsigned long int frompc, >> + unsigned long int selfpc); >> + >> +#define _MCOUNT_DECL(frompc, selfpc) \ >> + static inline void mcount_internal (unsigned long int frompc, \ >> + unsigned long int selfpc) >> + >> +#define MCOUNT \ >> + void _mcount (void *frompc) \ >> + { \ >> + mcount_internal ((unsigned long int) frompc, \ >> + (unsigned long int) RETURN_ADDRESS (0)); \ >> + } >> diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S >> new file mode 100644 >> index 0000000000..b93ae2f5da >> --- /dev/null >> +++ b/sysdeps/loongarch/setjmp.S >> @@ -0,0 +1,66 @@ >> +/* setjmp for LoongArch. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <sysdep.h> >> +#include <sys/asm.h> >> + >> +ENTRY (_setjmp) >> + li.w a1,0 >> + b __sigsetjmp >> +END (_setjmp) >> + >> +ENTRY (setjmp) >> + li.w a1,1 >> +END (setjmp) >> + >> +ENTRY (__sigsetjmp) >> + REG_S ra, a0, 0*SZREG >> + REG_S sp, a0, 1*SZREG >> + REG_S x, a0, 2*SZREG >> + REG_S fp, a0, 3*SZREG >> + REG_S s0, a0, 4*SZREG >> + REG_S s1, a0, 5*SZREG >> + REG_S s2, a0, 6*SZREG >> + REG_S s3, a0, 7*SZREG >> + REG_S s4, a0, 8*SZREG >> + REG_S s5, a0, 9*SZREG >> + REG_S s6, a0, 10*SZREG >> + REG_S s7, a0, 11*SZREG >> + REG_S s8, a0, 12*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_S $f24, a0, 13*SZREG + 0*SZFREG >> + FREG_S $f25, a0, 13*SZREG + 1*SZFREG >> + FREG_S $f26, a0, 13*SZREG + 2*SZFREG >> + FREG_S $f27, a0, 13*SZREG + 3*SZFREG >> + FREG_S $f28, a0, 13*SZREG + 4*SZFREG >> + FREG_S $f29, a0, 13*SZREG + 5*SZFREG >> + FREG_S $f30, a0, 13*SZREG + 6*SZFREG >> + FREG_S $f31, a0, 13*SZREG + 7*SZFREG >> +#endif >> + >> +#if !IS_IN (libc) && IS_IN(rtld) >> + li.w v0, 0 >> + jirl zero,ra,0 >> +#else >> + b __sigjmp_save >> +#endif >> +END (__sigsetjmp) >> + >> +hidden_def (__sigsetjmp) >> +weak_alias (_setjmp, __GI__setjmp) >> diff --git a/sysdeps/loongarch/sotruss-lib.c >> b/sysdeps/loongarch/sotruss-lib.c >> new file mode 100644 >> index 0000000000..5b15f4815a >> --- /dev/null >> +++ b/sysdeps/loongarch/sotruss-lib.c >> @@ -0,0 +1,50 @@ >> +/* Override generic sotruss-lib.c to define actual functions for >> LoongArch. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#define HAVE_ARCH_PLTENTER >> +#define HAVE_ARCH_PLTEXIT >> + >> +#include <elf/sotruss-lib.c> >> + >> +ElfW (Addr) >> +la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), >> + unsigned int ndx __attribute__ ((unused)), >> + uintptr_t *refcook, uintptr_t *defcook, >> + La_loongarch_regs *regs, unsigned int *flags, >> + const char *symname, long int *framesizep) >> +{ >> + print_enter (refcook, defcook, symname, regs->lr_reg[0], >> regs->lr_reg[1], >> + regs->lr_reg[2], *flags); >> + >> + /* No need to copy anything, we will not need the parameters in >> any case. */ >> + *framesizep = 0; >> + >> + return sym->st_value; >> +} >> + >> +unsigned int >> +la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, >> + uintptr_t *refcook, uintptr_t *defcook, >> + const struct La_loongarch_regs *inregs, >> + struct La_loongarch_retval *outregs, >> + const char *symname) >> +{ >> + print_exit (refcook, defcook, symname, outregs->lrv_a0); >> + >> + return 0; >> +} >> diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S >> new file mode 100644 >> index 0000000000..a9b32aa966 >> --- /dev/null >> +++ b/sysdeps/loongarch/start.S >> @@ -0,0 +1,67 @@ >> +/* Startup code compliant to the ELF LoongArch ABI. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#define __ASSEMBLY__ 1 >> +#include <entry.h> >> +#include <sys/asm.h> >> + >> +/* The entry point's job is to call __libc_start_main. Per the ABI, >> + a0 contains the address of a function to be passed to atexit. >> + __libc_start_main wants this in a5. */ >> + >> +/* >> +int >> +__libc_start_main (int (*main) (int, char **, char **), >> + int argc, >> + char **argv, >> + __typeof (main) init, >> + void (*fini) (void), >> + void (*rtld_fini) (void), >> + void *stack_end); >> + */ >> + >> +ENTRY (ENTRY_POINT) >> + >> +/* Terminate call stack by noting ra is undefined. Use a dummy >> + .cfi_label to force starting the FDE. */ >> + .cfi_label .Ldummy >> + cfi_undefined (1) >> + or a5, a0, zero /* rtld_fini */ >> + >> +/* We must get symbol main through GOT table, since main may not be >> local. >> + For instance: googletest defines main in dynamic library. */ >> + la.got a0, t0, main >> + REG_L a1, sp, 0 >> + ADDI a2, sp, SZREG >> + >> + /* Adjust $sp for 16-aligned */ >> + SRLI sp, sp, 4 >> + SLLI sp, sp, 4 >> + >> + move a3, zero /* used to be init */ >> + move a4, zero /* used to be fini */ >> + or a6, sp, zero /* stack_end */ >> + >> + la.got ra, t0, __libc_start_main >> + jirl ra, ra, 0 >> + >> + la.got ra, t0, abort >> + jirl ra, ra, 0 >> +END (ENTRY_POINT) >> + >> diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h >> new file mode 100644 >> index 0000000000..b41ee59694 >> --- /dev/null >> +++ b/sysdeps/loongarch/sys/asm.h >> @@ -0,0 +1,59 @@ >> +/* Miscellaneous macros. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _SYS_ASM_H >> +#define _SYS_ASM_H >> + >> +#include <sys/regdef.h> >> +#include <sysdeps/generic/sysdep.h> >> + >> +/* Macros to handle different pointer/register sizes for 32/64-bit >> code. */ >> +#define SZREG 8 >> +#define SZFREG 8 >> +#define REG_L ld.d >> +#define REG_S st.d >> +#define SRLI srli.d >> +#define SLLI slli.d >> +#define ADDI addi.d >> +#define ADD add.d >> +#define BSTRINS bstrins.d >> +#define LI li.d >> +#define FREG_L fld.d >> +#define FREG_S fst.d >> + >> +/* Declare leaf routine. */ >> +#define LEAF(symbol) \ >> + .text; \ >> + .globl symbol; \ >> + .align 3; \ >> + cfi_startproc; \ >> + .type symbol, @function; \ >> + symbol: >> + >> +#define ENTRY(symbol) LEAF (symbol) >> + >> +/* Mark end of function. */ >> +#undef END >> +#define END(function) \ >> + cfi_endproc; \ >> + .size function, .- function; >> + >> +/* Stack alignment. */ >> +#define ALMASK ~15 >> + >> +#endif /* sys/asm.h */ >> diff --git a/sysdeps/loongarch/tst-audit.h >> b/sysdeps/loongarch/tst-audit.h >> new file mode 100644 >> index 0000000000..e71948c86e >> --- /dev/null >> +++ b/sysdeps/loongarch/tst-audit.h >> @@ -0,0 +1,23 @@ >> +/* Definitions for testing PLT entry/exit auditing. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#define pltenter la_loongarch_gnu_pltenter >> +#define pltexit la_loongarch_gnu_pltexit >> +#define La_regs La_loongarch_regs >> +#define La_retval La_loongarch_retval >> +#define int_retval lrv_a0 >> diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> new file mode 100644 >> index 0000000000..4887c30ca2 >> --- /dev/null >> +++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> @@ -0,0 +1,26 @@ >> +/* ldconfig default paths and libraries. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <http://www.gnu.org/licenses/>. */ >> + >> +#include <sysdeps/generic/ldconfig.h> >> + >> +#define SYSDEP_KNOWN_INTERPRETER_NAMES \ >> + { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, >> + >> +#define SYSDEP_KNOWN_LIBRARY_NAMES \ >> + { "libc.so.6", FLAG_ELF_LIBC6 }, \ >> + { "libm.so.6", FLAG_ELF_LIBC6 }, >> -- >> 2.31.1 >>
On 2022-06-10, caiyinyu wrote: >+ >+#define elf_machine_type_class(type) \ >+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ > >Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list >seems an unneeded hack for many ports. Can you check does loongarch >really need them? > >*Removed*. Thanks. >*>>>>>>>>>>>>>>>* > >diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h >index 3beaaee117..500fe71a7e 100644 >--- a/sysdeps/loongarch/dl-machine.h >+++ b/sysdeps/loongarch/dl-machine.h >@@ -47,13 +47,7 @@ > #define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE > > #define elf_machine_type_class(type) \ >- ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT \ >- || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >- || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >- || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >- || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >- || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >- || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ >+ ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT)) \ > | (ELF_RTYPE_CLASS_COPY *((type) == R_LARCH_COPY))) > > #define ELF_MACHINE_NO_REL 1 > >*<<<<<<<<<<<<<<<<<<* > >* >* > >+#define RTLD_START \ >+ asm(".text\n\ >+ " _RTLD_PROLOGUE (ENTRY_POINT) "\ >+ .cfi_label .Ldummy \n\ >+ " CFI_UNDEFINED (1) " \n\ >+ or $a0, $sp, $zero \n\ >+ bl _dl_start \n\ >+ # Stash user entry point in s0. \n\ >+ or $s0, $v0, $zero \n\ >+ # Load the original argument count. \n\ >+ ld.d $a1, $sp, 0 \n\ >+ # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ >+ char **env) \n\ >+ la $a0, _rtld_local \n\ >+ ld.d $a0, $a0, 0 \n\ >+ addi.d $a2, $sp, 8 \n\ >+ slli.d $a3, $a1, 3 \n\ >+ add.d $a3, $a3, $a2 \n\ >+ addi.d $a3, $a3, 8 \n\ > >The _dl_init seems much more complex than the riscv counterpart. > >*There is no need to simplify further.* > Thanks. >>>>>>>>>>>>>>>>>>> > >loongarch: > > 96 # Call _dl_init (struct link_map *main_map, int argc, char >**argv, \ > 97 char **env) \n\ >* 98 la $a0, _rtld_local \n\ > 99 ld.d $a0, $a0, 0 \n\ * >*100 addi.d $a2, $sp, 8 \n\ ** >**101 slli.d $a3, $a1, 3 \n\ ** >**102 add.d $a3, $a3, $a2 \n\ ** >**103 addi.d $a3, $a3, 8 \n\* >104 # Stash the stack pointer in s1.\n\ > >riscv: > >112 # Call _dl_init (struct link_map *main_map, int argc, char >**argv, char **env) \n\ >*113 " STRINGXP (REG_L) " a0, _rtld_local\n\* >*114 add a2, sp, " STRINGXP (SZREG) "\n\** >**115 sll a3, a1, " STRINGXP (PTRLOG) "\n\** >**116 add a3, a3, a2\n\** >**117 add a3, a3, " STRINGXP (SZREG) "\n\* >118 # Stash the stack pointer in s1.\n\ > ><<<<<<<<<<<<<< > > >>+ # Adjust $sp for 16-aligned \n\ >>+ srli.d $t0, $sp, 4 \n\ >>+ slli.d $t0, $t0, 4 \n\ >>+ ori $t1, $sp, 0 \n\ >>+ addi.d $sp, $t0, -32 \n\ >>+ st.d $t1, $sp, 24 \n\ > >Seems too complex. > >*Fixed.* Thanks. >*>>>>>>>>>>>>>>>>>>>* > >*diff --git a/sysdeps/loongarch/dl-machine.h >b/sysdeps/loongarch/dl-machine.h >index 500fe71a7e..6ec9a403d3 100644 >--- a/sysdeps/loongarch/dl-machine.h >+++ b/sysdeps/loongarch/dl-machine.h >@@ -101,16 +101,15 @@ static inline ElfW (Addr) elf_machine_dynamic (void) > slli.d $a3, $a1, 3 \n\ > add.d $a3, $a3, $a2 \n\ > addi.d $a3, $a3, 8 \n\ >+ # Stash the stack pointer in s1.\n\ >+ or $s1, $sp, $zero \n\ > # Adjust $sp for 16-aligned \n\ >- srli.d $t0, $sp, 4 \n\ >- slli.d $t0, $t0, 4 \n\ >- ori $t1, $sp, 0 \n\ >- addi.d $sp, $t0, -32 \n\ >- st.d $t1, $sp, 24 \n\ >+ bstrins.d $sp, $zero, 3, 0 \n\ > # Call the function to run the initializers. \n\ > bl _dl_init \n\ >+ # Restore the stack pointer for _start.\n\ >+ or $sp, $s1, $zero \n\ > # Pass our finalizer function to _start. \n\ >- ld.d $sp, $sp, 24 \n\ > la $a0, _dl_fini \n\ > # Jump to the user entry point. \n\ > jirl $zero, $s0, 0 \n\ >* > >*<<<<<<<<<<<<<<<<<<* > > >+static inline void __attribute__ ((always_inline)) >+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >+ const ElfW (Rela) * reloc, >+ const ElfW (Sym) * sym, > >Seems excess space after `*` > >*Fixed all same problems.* Thanks. >+ /* Check for unexpected PLT reloc type. */ >+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >+ { >+ if (__glibc_unlikely (map->l_mach.plt == 0)) >+ { >+ if (l_addr) >+ *reloc_addr += l_addr; >+ } >+ else >+ *reloc_addr = map->l_mach.plt; >+ } >+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > >This is a design issue of ifunc for many ports. >Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in >.rela.plt, then you can remove this branch. > > >*Definitely, for riscv, x86 and aarch64..., there are **R_*_IRELATIVEs >in their **.rela.plt.* > >*But I don't understand why "Ideally R_*_IRELATIVE relocations are >only in .rela.dyn"?* > >*Could you explain it?* > >*or we just keep it now? >* > >*Thanks.* See https://maskray.me/blog/2021-01-18-gnu-indirect-function ".rela.dyn vs .rela.plt" Conceptually .rela.plt should only have potentially lazy resolved relocations. IRELATIVE are always eager, so .rela.plt isn't applicable. In the early days things were a bit messy in the implementation, so some early ports adopting ifunc may use .rela.plt . GNU ld's PowerPC port apperas to do the right thing. All lld supported ports do the right thing. >* >* > >在 2022/6/6 上午7:55, Fangrui Song 写道: >>On 2022-06-01, caiyinyu wrote: >>>--- >>>sysdeps/loongarch/__longjmp.S | 52 ++++ >>>sysdeps/loongarch/bits/endianness.h | 11 + >>>sysdeps/loongarch/bits/link.h | 58 ++++ >>>sysdeps/loongarch/bits/setjmp.h | 42 +++ >>>sysdeps/loongarch/bsd-_setjmp.c | 1 + >>>sysdeps/loongarch/bsd-setjmp.c | 1 + >>>sysdeps/loongarch/dl-machine.h | 307 +++++++++++++++++++ >>>sysdeps/loongarch/dl-trampoline.S | 91 ++++++ >>>sysdeps/loongarch/jmpbuf-offsets.h | 22 ++ >>>sysdeps/loongarch/jmpbuf-unwind.h | 45 +++ >>>sysdeps/loongarch/ldsodefs.h | 41 +++ >>>sysdeps/loongarch/linkmap.h | 22 ++ >>>sysdeps/loongarch/machine-gmon.h | 37 +++ >>>sysdeps/loongarch/setjmp.S | 66 ++++ >>>sysdeps/loongarch/sotruss-lib.c | 50 +++ >>>sysdeps/loongarch/start.S | 67 ++++ >>>sysdeps/loongarch/sys/asm.h | 59 ++++ >>>sysdeps/loongarch/tst-audit.h | 23 ++ >>>sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++ >>>19 files changed, 1021 insertions(+) >>>create mode 100644 sysdeps/loongarch/__longjmp.S >>>create mode 100644 sysdeps/loongarch/bits/endianness.h >>>create mode 100644 sysdeps/loongarch/bits/link.h >>>create mode 100644 sysdeps/loongarch/bits/setjmp.h >>>create mode 100644 sysdeps/loongarch/bsd-_setjmp.c >>>create mode 100644 sysdeps/loongarch/bsd-setjmp.c >>>create mode 100644 sysdeps/loongarch/dl-machine.h >>>create mode 100644 sysdeps/loongarch/dl-trampoline.S >>>create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h >>>create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h >>>create mode 100644 sysdeps/loongarch/ldsodefs.h >>>create mode 100644 sysdeps/loongarch/linkmap.h >>>create mode 100644 sysdeps/loongarch/machine-gmon.h >>>create mode 100644 sysdeps/loongarch/setjmp.S >>>create mode 100644 sysdeps/loongarch/sotruss-lib.c >>>create mode 100644 sysdeps/loongarch/start.S >>>create mode 100644 sysdeps/loongarch/sys/asm.h >>>create mode 100644 sysdeps/loongarch/tst-audit.h >>>create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>> >>>diff --git a/sysdeps/loongarch/__longjmp.S >>>b/sysdeps/loongarch/__longjmp.S >>>new file mode 100644 >>>index 0000000000..b7690dd94f >>>--- /dev/null >>>+++ b/sysdeps/loongarch/__longjmp.S >>>@@ -0,0 +1,52 @@ >>>+/* longjmp. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#include <sysdep.h> >>>+#include <sys/asm.h> >>>+ >>>+ENTRY (__longjmp) >>>+ REG_L ra, a0, 0*SZREG >>>+ REG_L sp, a0, 1*SZREG >>>+ REG_L x, a0, 2*SZREG >>>+ REG_L fp, a0, 3*SZREG >>>+ REG_L s0, a0, 4*SZREG >>>+ REG_L s1, a0, 5*SZREG >>>+ REG_L s2, a0, 6*SZREG >>>+ REG_L s3, a0, 7*SZREG >>>+ REG_L s4, a0, 8*SZREG >>>+ REG_L s5, a0, 9*SZREG >>>+ REG_L s6, a0, 10*SZREG >>>+ REG_L s7, a0, 11*SZREG >>>+ REG_L s8, a0, 12*SZREG >>>+ >>>+#ifndef __loongarch_soft_float >>>+ FREG_L $f24, a0, 13*SZREG + 0*SZFREG >>>+ FREG_L $f25, a0, 13*SZREG + 1*SZFREG >>>+ FREG_L $f26, a0, 13*SZREG + 2*SZFREG >>>+ FREG_L $f27, a0, 13*SZREG + 3*SZFREG >>>+ FREG_L $f28, a0, 13*SZREG + 4*SZFREG >>>+ FREG_L $f29, a0, 13*SZREG + 5*SZFREG >>>+ FREG_L $f30, a0, 13*SZREG + 6*SZFREG >>>+ FREG_L $f31, a0, 13*SZREG + 7*SZFREG >>>+#endif >>>+ >>>+ sltui a0,a1,1 >>>+ ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 >>>+ jirl zero,ra,0 >>>+ >>>+END (__longjmp) >>>diff --git a/sysdeps/loongarch/bits/endianness.h >>>b/sysdeps/loongarch/bits/endianness.h >>>new file mode 100644 >>>index 0000000000..7290be7b18 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/bits/endianness.h >>>@@ -0,0 +1,11 @@ >>>+#ifndef _BITS_ENDIANNESS_H >>>+#define _BITS_ENDIANNESS_H 1 >>>+ >>>+#ifndef _BITS_ENDIAN_H >>>+#error "Never use <bits/endianness.h> directly; include >>><endian.h> instead." >>>+#endif >>>+ >>>+/* LoongArch is little-endian. */ >>>+#define __BYTE_ORDER __LITTLE_ENDIAN >>>+ >>>+#endif /* bits/endianness.h */ >>>diff --git a/sysdeps/loongarch/bits/link.h >>>b/sysdeps/loongarch/bits/link.h >>>new file mode 100644 >>>index 0000000000..4df09989cb >>>--- /dev/null >>>+++ b/sysdeps/loongarch/bits/link.h >>>@@ -0,0 +1,58 @@ >>>+/* Machine-specific declarations for dynamic linker interface. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#ifndef _LINK_H >>>+#error "Never include <bits/link.h> directly; use <link.h> instead." >>>+#endif >>>+ >>>+typedef struct La_loongarch_regs >>>+{ >>>+ unsigned long int lr_reg[8]; /* a0 - a7 */ >>>+ double lr_fpreg[8]; /* fa0 - fa7 */ >>>+ unsigned long int lr_ra; >>>+ unsigned long int lr_sp; >>>+} La_loongarch_regs; >>>+ >>>+/* Return values for calls from PLT on LoongArch. */ >>>+typedef struct La_loongarch_retval >>>+{ >>>+ unsigned long int lrv_a0; >>>+ unsigned long int lrv_a1; >>>+ double lrv_fa0; >>>+ double lrv_fa1; >>>+} La_loongarch_retval; >>>+ >>>+__BEGIN_DECLS >>>+ >>>+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, >>>+ unsigned int __ndx, >>>+ uintptr_t *__refcook, >>>+ uintptr_t *__defcook, >>>+ La_loongarch_regs *__regs, >>>+ unsigned int *__flags, >>>+ const char *__symname, >>>+ long int *__framesizep); >>>+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, >>>+ unsigned int __ndx, >>>+ uintptr_t *__refcook, >>>+ uintptr_t *__defcook, >>>+ const La_loongarch_regs *__inregs, >>>+ La_loongarch_retval *__outregs, >>>+ const char *__symname); >>>+ >>>+__END_DECLS >>>diff --git a/sysdeps/loongarch/bits/setjmp.h >>>b/sysdeps/loongarch/bits/setjmp.h >>>new file mode 100644 >>>index 0000000000..8b323ad2b6 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/bits/setjmp.h >>>@@ -0,0 +1,42 @@ >>>+/* Define the machine-dependent type `jmp_buf'. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#ifndef _LOONGARCH_BITS_SETJMP_H >>>+#define _LOONGARCH_BITS_SETJMP_H >>>+ >>>+typedef struct __jmp_buf_internal_tag >>>+{ >>>+ /* Program counter. */ >>>+ long int __pc; >>>+ /* Stack pointer. */ >>>+ long int __sp; >>>+ /* Reserved */ >>>+ long int __x; >>>+ /* Frame pointer. */ >>>+ long int __fp; >>>+ /* Callee-saved registers. */ >>>+ long int __regs[9]; >>>+ >>>+#ifndef __loongarch_soft_float >>>+ /* Callee-saved floating point registers. */ >>>+ double __fpregs[8]; >>>+#endif >>>+ >>>+} __jmp_buf[1]; >>>+ >>>+#endif /* _LOONGARCH_BITS_SETJMP_H */ >>>diff --git a/sysdeps/loongarch/bsd-_setjmp.c >>>b/sysdeps/loongarch/bsd-_setjmp.c >>>new file mode 100644 >>>index 0000000000..32f49441c3 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/bsd-_setjmp.c >>>@@ -0,0 +1 @@ >>>+/* _setjmp is implemented in setjmp.S. */ >>>diff --git a/sysdeps/loongarch/bsd-setjmp.c >>>b/sysdeps/loongarch/bsd-setjmp.c >>>new file mode 100644 >>>index 0000000000..45fd802aac >>>--- /dev/null >>>+++ b/sysdeps/loongarch/bsd-setjmp.c >>>@@ -0,0 +1 @@ >>>+/* setjmp is implemented in setjmp.S. */ >>>diff --git a/sysdeps/loongarch/dl-machine.h >>>b/sysdeps/loongarch/dl-machine.h >>>new file mode 100644 >>>index 0000000000..4e19ad9319 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/dl-machine.h >>>@@ -0,0 +1,307 @@ >>>+/* Machine-dependent ELF dynamic relocation inline functions. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#ifndef dl_machine_h >>>+#define dl_machine_h >>>+ >>>+#define ELF_MACHINE_NAME "LoongArch" >>>+ >>>+#include <entry.h> >>>+#include <elf/elf.h> >>>+#include <sys/asm.h> >>>+#include <dl-tls.h> >>>+#include <dl-static-tls.h> >>>+#include <dl-machine-rel.h> >>>+ >>>+#ifndef _RTLD_PROLOGUE >>>+# define _RTLD_PROLOGUE(entry) \ >>>+ ".globl\t" __STRING (entry) "\n\t" \ >>>+ ".type\t" __STRING (entry) ", @function\n\t" \ >>>+ CFI_STARTPROC "\n" \ >>>+ __STRING (entry) ":\n" >>>+#endif >>>+ >>>+#ifndef _RTLD_EPILOGUE >>>+# define _RTLD_EPILOGUE(entry) \ >>>+ CFI_ENDPROC "\n\t" \ >>>+ ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" >>>+#endif >>>+ >>>+#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT >>>+#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE >>>+ >>>+#define elf_machine_type_class(type) \ >>>+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >>>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >>>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >>>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >>>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >>>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >>>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ >> >>Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list >>seems an unneeded hack for many ports. Can you check does loongarch >>really need them? >> >>>+ | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) >>>+ >>>+#define ELF_MACHINE_NO_REL 1 >>>+#define ELF_MACHINE_NO_RELA 0 >>>+ >>>+/* Return nonzero iff ELF header is compatible with the running >>>host. */ >>>+static inline int >>>+elf_machine_matches_host (const ElfW (Ehdr) * ehdr) >>>+{ >>>+ /* We can only run LoongArch binaries. */ >>>+ if (ehdr->e_machine != EM_LOONGARCH) >>>+ return 0; >>>+ >>>+ return 1; >>>+} >>>+ >>>+/* Return the run-time load address of the shared object. */ >>>+static inline ElfW (Addr) elf_machine_load_address (void) >>>+{ >>>+ extern const ElfW(Ehdr) __ehdr_start attribute_hidden; >>>+ return (ElfW(Addr)) &__ehdr_start; >>>+} >>>+ >>>+/* Return the link-time address of _DYNAMIC. */ >>>+static inline ElfW (Addr) elf_machine_dynamic (void) >>>+{ >>>+ extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; >>>+ return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); >>>+} >>>+ >>>+/* Initial entry point code for the dynamic linker. >>>+ The C function `_dl_start' is the real entry point; >>>+ its return value is the user program's entry point. */ >>>+ >>>+#define RTLD_START \ >>>+ asm(".text\n\ >>>+ " _RTLD_PROLOGUE (ENTRY_POINT) "\ >>>+ .cfi_label .Ldummy \n\ >>>+ " CFI_UNDEFINED (1) " \n\ >>>+ or $a0, $sp, $zero \n\ >>>+ bl _dl_start \n\ >>>+ # Stash user entry point in s0. \n\ >>>+ or $s0, $v0, $zero \n\ >>>+ # Load the original argument count. \n\ >>>+ ld.d $a1, $sp, 0 \n\ >>>+ # Call _dl_init (struct link_map *main_map, int argc, char >>>**argv, \ >>>+ char **env) \n\ >>>+ la $a0, _rtld_local \n\ >>>+ ld.d $a0, $a0, 0 \n\ >>>+ addi.d $a2, $sp, 8 \n\ >>>+ slli.d $a3, $a1, 3 \n\ >>>+ add.d $a3, $a3, $a2 \n\ >>>+ addi.d $a3, $a3, 8 \n\ >> >>The _dl_init seems much more complex than the riscv counterpart. >> >>>+ # Adjust $sp for 16-aligned \n\ >>>+ srli.d $t0, $sp, 4 \n\ >>>+ slli.d $t0, $t0, 4 \n\ >>>+ ori $t1, $sp, 0 \n\ >>>+ addi.d $sp, $t0, -32 \n\ >>>+ st.d $t1, $sp, 24 \n\ >> >>Seems too complex. >> >>>+ # Call the function to run the initializers. \n\ >>>+ bl _dl_init \n\ >>>+ # Pass our finalizer function to _start. \n\ >>>+ ld.d $sp, $sp, 24 \n\ >>>+ la $a0, _dl_fini \n\ >>>+ # Jump to the user entry point. \n\ >>>+ jirl $zero, $s0, 0 \n\ >>>+ " _RTLD_EPILOGUE (ENTRY_POINT) "\ >>>+ .previous"); >>>+ >>>+/* Names of the architecture-specific auditing callback functions. */ >>>+#define ARCH_LA_PLTENTER loongarch_gnu_pltenter >>>+#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit >>>+ >>>+/* Bias .got.plt entry by the offset requested by the PLT header. */ >>>+#define elf_machine_plt_value(map, reloc, value) (value) >>>+ >>>+static inline ElfW (Addr) >>>+elf_machine_fixup_plt (struct link_map *map, lookup_t t, >>>+ const ElfW (Sym) * refsym, const ElfW (Sym) * sym, >>>+ const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, >>>+ ElfW (Addr) value) >>>+{ >>>+ return *reloc_addr = value; >>>+} >>>+ >>>+#endif /* !dl_machine_h */ >>>+ >>>+#ifdef RESOLVE_MAP >>>+ >>>+/* Perform a relocation described by R_INFO at the location pointed to >>>+ by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and >>>+ MAP is the object containing the reloc. */ >>>+ >>>+static inline void __attribute__ ((always_inline)) >>>+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >>>+ const ElfW (Rela) * reloc, >>>+ const ElfW (Sym) * sym, >> >>Seems excess space after `*` >> >>>+ const struct r_found_version *version, >>>+ void *const reloc_addr, int skip_ifunc) >>>+{ >>>+ ElfW (Addr) r_info = reloc->r_info; >>>+ const unsigned long int r_type = ELFW (R_TYPE) (r_info); >>>+ ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; >>>+ const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; >>>+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, >>>version, r_type); >>>+ ElfW (Addr) value = 0; >>>+ if (sym_map != NULL) >>>+ value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; >>>+ >>>+ if (sym != NULL >>>+ && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == >>>STT_GNU_IFUNC) >>>+ && __glibc_likely (sym->st_shndx != SHN_UNDEF) >>>+ && __glibc_likely (!skip_ifunc)) >>>+ value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); >>>+ >>>+ switch (r_type) >>>+ { >>>+#ifndef RTLD_BOOTSTRAP >>>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: >>>+ R_LARCH_TLS_DTPMOD32: >>>+ if (sym_map) >>>+ *addr_field = sym_map->l_tls_modid; >>>+ break; >> >>I know many ports do `if (sym_map)` but that seems (a) a workaround >>for possibly >>GNU ld bugs or (b) unneeded cargo cult. >> >>The check should better be removed. >> >>This applies to various TLS dynamic relocations below. >> >>>+ >>>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: >>>+ R_LARCH_TLS_DTPREL32: >>>+ if (sym != NULL) >>>+ *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; >>>+ break; >>>+ >>>+ case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: >>>+ R_LARCH_TLS_TPREL32: >>>+ if (sym != NULL) >>>+ { >>>+ CHECK_STATIC_TLS (map, sym_map); >>>+ *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; >>>+ } >>>+ break; >>>+ >>>+ case R_LARCH_COPY: >>>+ { >>>+ if (sym == NULL) >>>+ /* This can happen in trace mode if an object could not be >>>+ found. */ >>>+ break; >>>+ if (__glibc_unlikely (sym->st_size > refsym->st_size) >>>+ || (__glibc_unlikely (sym->st_size < refsym->st_size) >>>+ && GLRO(dl_verbose))) >>>+ { >>>+ const char *strtab; >>>+ >>>+ strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); >>>+ _dl_error_printf ("\ >>>+%s: Symbol `%s' has different size in shared object, consider >>>re-linking\n", >>>+ rtld_progname ?: "<program name unknown>", >>>+ strtab + refsym->st_name); >>>+ } >>>+ memcpy (reloc_addr, (void *) value, >>>+ MIN (sym->st_size, refsym->st_size)); >>>+ break; >>>+ } >>>+#endif >>>+ >>>+#if !defined RTLD_BOOTSTRAP >>>+ case R_LARCH_RELATIVE: >>>+ *addr_field = map->l_addr + reloc->r_addend; >>>+ break; >>>+#endif >> >>I think this is copied from riscv but its relocation code is probably >>not the best reference. sysdeps/m68k/dl-machine.h may be one of the >>better implementations for the relocation switch table. >> >>In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are >>needed in this function. There should be none of NONE, RELATIVE, >>IRELATIVE, absolute relocation types, etc (RELATIVE is handled >>elsewhere). >> >>GNU ld, in the presence of a bug, may produce spurious NONE relocations. >>Not handling NONE can catch some bugs. >> >>>+ case R_LARCH_JUMP_SLOT: >>>+ case __WORDSIZE == 64 ? R_LARCH_64: >>>+ R_LARCH_32: >>>+ *addr_field = value; >>>+ break; >>>+ >>>+ case R_LARCH_IRELATIVE: >>>+ value = map->l_addr + reloc->r_addend; >>>+ if (__glibc_likely (!skip_ifunc)) >>>+ value = ((ElfW (Addr) (*) (void)) value) (); >>>+ *addr_field = value; >>>+ break; >>>+ >>>+ case R_LARCH_NONE: >>>+ break; >>>+ >>>+ default: >>>+ _dl_reloc_bad_type (map, r_type, 0); >>>+ break; >>>+ } >>>+} >>>+ >>>+static inline void __attribute__ ((always_inline)) >>>+elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) >>>* reloc, >>>+ void *const reloc_addr) >>>+{ >>>+ *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; >>>+} >>>+ >>>+static inline void __attribute__ ((always_inline)) >>>+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem >>>*scope[], >>>+ ElfW (Addr) l_addr, >>>+ const ElfW (Rela) * reloc, int skip_ifunc) >>>+{ >>>+ ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset); >>>+ const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); >>>+ >>>+ /* Check for unexpected PLT reloc type. */ >>>+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >>>+ { >>>+ if (__glibc_unlikely (map->l_mach.plt == 0)) >>>+ { >>>+ if (l_addr) >>>+ *reloc_addr += l_addr; >>>+ } >>>+ else >>>+ *reloc_addr = map->l_mach.plt; >>>+ } >>>+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) >> >>This is a design issue of ifunc for many ports. >>Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in >>.rela.plt, then you can remove this branch. >> >>>+ { >>>+ ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); >>>+ if (__glibc_likely (!skip_ifunc)) >>>+ value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); >>>+ *reloc_addr = (ElfW (Addr)) value; >>>+ } >>>+ else >>>+ _dl_reloc_bad_type (map, r_type, 1); >>>+} >>>+ >>>+/* Set up the loaded object described by L so its stub function >>>+ will jump to the on-demand fixup code __dl_runtime_resolve. */ >>>+ >>>+static inline int __attribute__ ((always_inline)) >>>+elf_machine_runtime_setup (struct link_map *l, struct >>>r_scope_elem *scope[], >>>+ int lazy, int profile) >>>+{ >>>+#ifndef RTLD_BOOTSTRAP >>>+ /* If using PLTs, fill in the first two entries of .got.plt. */ >>>+ if (l->l_info[DT_JMPREL]) >>>+ { >>>+ extern void _dl_runtime_resolve (void) >>>+ __attribute__ ((visibility ("hidden"))); >>>+ ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, >>>l_info[DT_PLTGOT]); >>>+ gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; >>>+ gotplt[1] = (ElfW (Addr)) l; >>>+ } >>>+#endif >>>+ >>>+ return lazy; >>>+} >>>+ >>>+#endif /* RESOLVE_MAP */ >>>diff --git a/sysdeps/loongarch/dl-trampoline.S >>>b/sysdeps/loongarch/dl-trampoline.S >>>new file mode 100644 >>>index 0000000000..eb610392f6 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/dl-trampoline.S >>>@@ -0,0 +1,91 @@ >>>+/* PLT trampolines. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#include <sysdep.h> >>>+#include <sys/asm.h> >>>+ >>>+/* Assembler veneer called from the PLT header code for lazy loading. >>>+ The PLT header passes its own args in t0-t2. */ >>>+ >>>+#ifdef __loongarch_soft_float >>>+# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) >>>+#else >>>+# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) >>>+#endif >>>+ >>>+ENTRY (_dl_runtime_resolve) >>>+ >>>+ /* Save arguments to stack. */ >>>+ ADDI sp, sp, -FRAME_SIZE >>>+ >>>+ REG_S ra, sp, 9*SZREG >>>+ REG_S a0, sp, 1*SZREG >>>+ REG_S a1, sp, 2*SZREG >>>+ REG_S a2, sp, 3*SZREG >>>+ REG_S a3, sp, 4*SZREG >>>+ REG_S a4, sp, 5*SZREG >>>+ REG_S a5, sp, 6*SZREG >>>+ REG_S a6, sp, 7*SZREG >>>+ REG_S a7, sp, 8*SZREG >>>+ >>>+#ifndef __loongarch_soft_float >>>+ FREG_S fa0, sp, 10*SZREG + 0*SZFREG >>>+ FREG_S fa1, sp, 10*SZREG + 1*SZFREG >>>+ FREG_S fa2, sp, 10*SZREG + 2*SZFREG >>>+ FREG_S fa3, sp, 10*SZREG + 3*SZFREG >>>+ FREG_S fa4, sp, 10*SZREG + 4*SZFREG >>>+ FREG_S fa5, sp, 10*SZREG + 5*SZFREG >>>+ FREG_S fa6, sp, 10*SZREG + 6*SZFREG >>>+ FREG_S fa7, sp, 10*SZREG + 7*SZFREG >>>+#endif >>>+ >>>+ /* Update .got.plt and obtain runtime address of callee */ >>>+ SLLI a1, t1, 1 >>>+ or a0, t0, zero >>>+ ADD a1, a1, t1 >>>+ la a2, _dl_fixup >>>+ jirl ra, a2, 0 >>>+ or t1, v0, zero >>>+ >>>+ /* Restore arguments from stack. */ >>>+ REG_L ra, sp, 9*SZREG >>>+ REG_L a0, sp, 1*SZREG >>>+ REG_L a1, sp, 2*SZREG >>>+ REG_L a2, sp, 3*SZREG >>>+ REG_L a3, sp, 4*SZREG >>>+ REG_L a4, sp, 5*SZREG >>>+ REG_L a5, sp, 6*SZREG >>>+ REG_L a6, sp, 7*SZREG >>>+ REG_L a7, sp, 8*SZREG >>>+ >>>+#ifndef __loongarch_soft_float >>>+ FREG_L fa0, sp, 10*SZREG + 0*SZFREG >>>+ FREG_L fa1, sp, 10*SZREG + 1*SZFREG >>>+ FREG_L fa2, sp, 10*SZREG + 2*SZFREG >>>+ FREG_L fa3, sp, 10*SZREG + 3*SZFREG >>>+ FREG_L fa4, sp, 10*SZREG + 4*SZFREG >>>+ FREG_L fa5, sp, 10*SZREG + 5*SZFREG >>>+ FREG_L fa6, sp, 10*SZREG + 6*SZFREG >>>+ FREG_L fa7, sp, 10*SZREG + 7*SZFREG >>>+#endif >>>+ >>>+ ADDI sp, sp, FRAME_SIZE >>>+ >>>+ /* Invoke the callee. */ >>>+ jirl zero, t1, 0 >>>+END (_dl_runtime_resolve) >>>diff --git a/sysdeps/loongarch/jmpbuf-offsets.h >>>b/sysdeps/loongarch/jmpbuf-offsets.h >>>new file mode 100644 >>>index 0000000000..a4b8ea690e >>>--- /dev/null >>>+++ b/sysdeps/loongarch/jmpbuf-offsets.h >>>@@ -0,0 +1,22 @@ >>>+/* Private macros for accessing __jmp_buf contents. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>License as >>>+ published by the Free Software Foundation; either version 2.1 of the >>>+ License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#include <jmpbuf-unwind.h> >>>+ >>>+/* Helper for generic ____longjmp_chk(). */ >>>+#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) >>>diff --git a/sysdeps/loongarch/jmpbuf-unwind.h >>>b/sysdeps/loongarch/jmpbuf-unwind.h >>>new file mode 100644 >>>index 0000000000..6fa509151d >>>--- /dev/null >>>+++ b/sysdeps/loongarch/jmpbuf-unwind.h >>>@@ -0,0 +1,45 @@ >>>+/* Examine __jmp_buf for unwinding frames. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#include <setjmp.h> >>>+#include <stdint.h> >>>+#include <unwind.h> >>>+#include <sysdep.h> >>>+ >>>+/* Test if longjmp to JMPBUF would unwind the frame >>>+ containing a local variable at ADDRESS. */ >>>+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ >>>+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) >>>+ >>>+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ >>>+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA >>>(_context), _adj) >>>+ >>>+static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp >>>(__jmp_buf regs) >>>+{ >>>+ uintptr_t sp = regs[0].__sp; >>>+#ifdef PTR_DEMANGLE >>>+ PTR_DEMANGLE (sp); >>>+#endif >>>+ return sp; >>>+} >>>+ >>>+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ >>>+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) >>>+ >>>+/* We use the normal longjmp for unwinding. */ >>>+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) >>>diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h >>>new file mode 100644 >>>index 0000000000..36b1b25b9f >>>--- /dev/null >>>+++ b/sysdeps/loongarch/ldsodefs.h >>>@@ -0,0 +1,41 @@ >>>+/* Run-time dynamic linker data structures for loaded ELF shared >>>objects. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#ifndef _LOONGARCH_LDSODEFS_H >>>+#define _LOONGARCH_LDSODEFS_H 1 >>>+ >>>+#include <elf.h> >>>+ >>>+struct La_loongarch_regs; >>>+struct La_loongarch_retval; >>>+ >>>+#define ARCH_PLTENTER_MEMBERS \ >>>+ ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \ >>>+ uintptr_t *, uintptr_t *, \ >>>+ const struct La_loongarch_regs *, \ >>>+ unsigned int *, const char *name, \ >>>+ long int *framesizep); >>>+ >>>+#define ARCH_PLTEXIT_MEMBERS \ >>>+ unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \ >>>+ uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ >>>+ struct La_loongarch_retval *, const char *); >>>+ >>>+#include_next <ldsodefs.h> >>>+ >>>+#endif >>>diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h >>>new file mode 100644 >>>index 0000000000..bbba73ed70 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/linkmap.h >>>@@ -0,0 +1,22 @@ >>>+/* Definition of link_map_machine. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+struct link_map_machine >>>+{ >>>+ ElfW (Addr) plt; /* Address of .plt. */ >>>+}; >>>diff --git a/sysdeps/loongarch/machine-gmon.h >>>b/sysdeps/loongarch/machine-gmon.h >>>new file mode 100644 >>>index 0000000000..4a3cdd964e >>>--- /dev/null >>>+++ b/sysdeps/loongarch/machine-gmon.h >>>@@ -0,0 +1,37 @@ >>>+/* LoongArch definitions for profiling support. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library; if not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+/* Accept 'frompc' address as argument from the function that calls >>>+ _mcount for profiling. Use __builtin_return_address (0) >>>+ for the 'selfpc' address. */ >>>+ >>>+#include <sysdep.h> >>>+ >>>+static void mcount_internal (unsigned long int frompc, >>>+ unsigned long int selfpc); >>>+ >>>+#define _MCOUNT_DECL(frompc, selfpc) \ >>>+ static inline void mcount_internal (unsigned long int frompc, \ >>>+ unsigned long int selfpc) >>>+ >>>+#define MCOUNT \ >>>+ void _mcount (void *frompc) \ >>>+ { \ >>>+ mcount_internal ((unsigned long int) frompc, \ >>>+ (unsigned long int) RETURN_ADDRESS (0)); \ >>>+ } >>>diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S >>>new file mode 100644 >>>index 0000000000..b93ae2f5da >>>--- /dev/null >>>+++ b/sysdeps/loongarch/setjmp.S >>>@@ -0,0 +1,66 @@ >>>+/* setjmp for LoongArch. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#include <sysdep.h> >>>+#include <sys/asm.h> >>>+ >>>+ENTRY (_setjmp) >>>+ li.w a1,0 >>>+ b __sigsetjmp >>>+END (_setjmp) >>>+ >>>+ENTRY (setjmp) >>>+ li.w a1,1 >>>+END (setjmp) >>>+ >>>+ENTRY (__sigsetjmp) >>>+ REG_S ra, a0, 0*SZREG >>>+ REG_S sp, a0, 1*SZREG >>>+ REG_S x, a0, 2*SZREG >>>+ REG_S fp, a0, 3*SZREG >>>+ REG_S s0, a0, 4*SZREG >>>+ REG_S s1, a0, 5*SZREG >>>+ REG_S s2, a0, 6*SZREG >>>+ REG_S s3, a0, 7*SZREG >>>+ REG_S s4, a0, 8*SZREG >>>+ REG_S s5, a0, 9*SZREG >>>+ REG_S s6, a0, 10*SZREG >>>+ REG_S s7, a0, 11*SZREG >>>+ REG_S s8, a0, 12*SZREG >>>+ >>>+#ifndef __loongarch_soft_float >>>+ FREG_S $f24, a0, 13*SZREG + 0*SZFREG >>>+ FREG_S $f25, a0, 13*SZREG + 1*SZFREG >>>+ FREG_S $f26, a0, 13*SZREG + 2*SZFREG >>>+ FREG_S $f27, a0, 13*SZREG + 3*SZFREG >>>+ FREG_S $f28, a0, 13*SZREG + 4*SZFREG >>>+ FREG_S $f29, a0, 13*SZREG + 5*SZFREG >>>+ FREG_S $f30, a0, 13*SZREG + 6*SZFREG >>>+ FREG_S $f31, a0, 13*SZREG + 7*SZFREG >>>+#endif >>>+ >>>+#if !IS_IN (libc) && IS_IN(rtld) >>>+ li.w v0, 0 >>>+ jirl zero,ra,0 >>>+#else >>>+ b __sigjmp_save >>>+#endif >>>+END (__sigsetjmp) >>>+ >>>+hidden_def (__sigsetjmp) >>>+weak_alias (_setjmp, __GI__setjmp) >>>diff --git a/sysdeps/loongarch/sotruss-lib.c >>>b/sysdeps/loongarch/sotruss-lib.c >>>new file mode 100644 >>>index 0000000000..5b15f4815a >>>--- /dev/null >>>+++ b/sysdeps/loongarch/sotruss-lib.c >>>@@ -0,0 +1,50 @@ >>>+/* Override generic sotruss-lib.c to define actual functions for >>>LoongArch. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#define HAVE_ARCH_PLTENTER >>>+#define HAVE_ARCH_PLTEXIT >>>+ >>>+#include <elf/sotruss-lib.c> >>>+ >>>+ElfW (Addr) >>>+la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), >>>+ unsigned int ndx __attribute__ ((unused)), >>>+ uintptr_t *refcook, uintptr_t *defcook, >>>+ La_loongarch_regs *regs, unsigned int *flags, >>>+ const char *symname, long int *framesizep) >>>+{ >>>+ print_enter (refcook, defcook, symname, regs->lr_reg[0], >>>regs->lr_reg[1], >>>+ regs->lr_reg[2], *flags); >>>+ >>>+ /* No need to copy anything, we will not need the parameters in >>>any case. */ >>>+ *framesizep = 0; >>>+ >>>+ return sym->st_value; >>>+} >>>+ >>>+unsigned int >>>+la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, >>>+ uintptr_t *refcook, uintptr_t *defcook, >>>+ const struct La_loongarch_regs *inregs, >>>+ struct La_loongarch_retval *outregs, >>>+ const char *symname) >>>+{ >>>+ print_exit (refcook, defcook, symname, outregs->lrv_a0); >>>+ >>>+ return 0; >>>+} >>>diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S >>>new file mode 100644 >>>index 0000000000..a9b32aa966 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/start.S >>>@@ -0,0 +1,67 @@ >>>+/* Startup code compliant to the ELF LoongArch ABI. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#define __ASSEMBLY__ 1 >>>+#include <entry.h> >>>+#include <sys/asm.h> >>>+ >>>+/* The entry point's job is to call __libc_start_main. Per the ABI, >>>+ a0 contains the address of a function to be passed to atexit. >>>+ __libc_start_main wants this in a5. */ >>>+ >>>+/* >>>+int >>>+__libc_start_main (int (*main) (int, char **, char **), >>>+ int argc, >>>+ char **argv, >>>+ __typeof (main) init, >>>+ void (*fini) (void), >>>+ void (*rtld_fini) (void), >>>+ void *stack_end); >>>+ */ >>>+ >>>+ENTRY (ENTRY_POINT) >>>+ >>>+/* Terminate call stack by noting ra is undefined. Use a dummy >>>+ .cfi_label to force starting the FDE. */ >>>+ .cfi_label .Ldummy >>>+ cfi_undefined (1) >>>+ or a5, a0, zero /* rtld_fini */ >>>+ >>>+/* We must get symbol main through GOT table, since main may not >>>be local. >>>+ For instance: googletest defines main in dynamic library. */ >>>+ la.got a0, t0, main >>>+ REG_L a1, sp, 0 >>>+ ADDI a2, sp, SZREG >>>+ >>>+ /* Adjust $sp for 16-aligned */ >>>+ SRLI sp, sp, 4 >>>+ SLLI sp, sp, 4 >>>+ >>>+ move a3, zero /* used to be init */ >>>+ move a4, zero /* used to be fini */ >>>+ or a6, sp, zero /* stack_end */ >>>+ >>>+ la.got ra, t0, __libc_start_main >>>+ jirl ra, ra, 0 >>>+ >>>+ la.got ra, t0, abort >>>+ jirl ra, ra, 0 >>>+END (ENTRY_POINT) >>>+ >>>diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h >>>new file mode 100644 >>>index 0000000000..b41ee59694 >>>--- /dev/null >>>+++ b/sysdeps/loongarch/sys/asm.h >>>@@ -0,0 +1,59 @@ >>>+/* Miscellaneous macros. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#ifndef _SYS_ASM_H >>>+#define _SYS_ASM_H >>>+ >>>+#include <sys/regdef.h> >>>+#include <sysdeps/generic/sysdep.h> >>>+ >>>+/* Macros to handle different pointer/register sizes for >>>32/64-bit code. */ >>>+#define SZREG 8 >>>+#define SZFREG 8 >>>+#define REG_L ld.d >>>+#define REG_S st.d >>>+#define SRLI srli.d >>>+#define SLLI slli.d >>>+#define ADDI addi.d >>>+#define ADD add.d >>>+#define BSTRINS bstrins.d >>>+#define LI li.d >>>+#define FREG_L fld.d >>>+#define FREG_S fst.d >>>+ >>>+/* Declare leaf routine. */ >>>+#define LEAF(symbol) \ >>>+ .text; \ >>>+ .globl symbol; \ >>>+ .align 3; \ >>>+ cfi_startproc; \ >>>+ .type symbol, @function; \ >>>+ symbol: >>>+ >>>+#define ENTRY(symbol) LEAF (symbol) >>>+ >>>+/* Mark end of function. */ >>>+#undef END >>>+#define END(function) \ >>>+ cfi_endproc; \ >>>+ .size function, .- function; >>>+ >>>+/* Stack alignment. */ >>>+#define ALMASK ~15 >>>+ >>>+#endif /* sys/asm.h */ >>>diff --git a/sysdeps/loongarch/tst-audit.h >>>b/sysdeps/loongarch/tst-audit.h >>>new file mode 100644 >>>index 0000000000..e71948c86e >>>--- /dev/null >>>+++ b/sysdeps/loongarch/tst-audit.h >>>@@ -0,0 +1,23 @@ >>>+/* Definitions for testing PLT entry/exit auditing. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <https://www.gnu.org/licenses/>. */ >>>+ >>>+#define pltenter la_loongarch_gnu_pltenter >>>+#define pltexit la_loongarch_gnu_pltexit >>>+#define La_regs La_loongarch_regs >>>+#define La_retval La_loongarch_retval >>>+#define int_retval lrv_a0 >>>diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>new file mode 100644 >>>index 0000000000..4887c30ca2 >>>--- /dev/null >>>+++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>@@ -0,0 +1,26 @@ >>>+/* ldconfig default paths and libraries. >>>+ Copyright (C) 2022 Free Software Foundation, Inc. >>>+ This file is part of the GNU C Library. >>>+ >>>+ The GNU C Library is free software; you can redistribute it and/or >>>+ modify it under the terms of the GNU Lesser General Public >>>+ License as published by the Free Software Foundation; either >>>+ version 2.1 of the License, or (at your option) any later version. >>>+ >>>+ The GNU C Library is distributed in the hope that it will be useful, >>>+ but WITHOUT ANY WARRANTY; without even the implied warranty of >>>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>+ Lesser General Public License for more details. >>>+ >>>+ You should have received a copy of the GNU Lesser General Public >>>+ License along with the GNU C Library. If not, see >>>+ <http://www.gnu.org/licenses/>. */ >>>+ >>>+#include <sysdeps/generic/ldconfig.h> >>>+ >>>+#define SYSDEP_KNOWN_INTERPRETER_NAMES \ >>>+ { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, >>>+ >>>+#define SYSDEP_KNOWN_LIBRARY_NAMES \ >>>+ { "libc.so.6", FLAG_ELF_LIBC6 }, \ >>>+ { "libm.so.6", FLAG_ELF_LIBC6 }, >>>-- >>>2.31.1 >>>
+#ifndef RTLD_BOOTSTRAP + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: + R_LARCH_TLS_DTPMOD32: + if (sym_map) + *addr_field = sym_map->l_tls_modid; + break; I know many ports do `if (sym_map)` but that seems (a) a workaround for possibly GNU ld bugs or (b) unneeded cargo cult. The check should better be removed. This applies to various TLS dynamic relocations below. *Removed. * + case R_LARCH_COPY: + { + if (sym == NULL) + /* This can happen in trace mode if an object could not be + found. */ + break; + if (__glibc_unlikely (sym->st_size > refsym->st_size) + || (__glibc_unlikely (sym->st_size < refsym->st_size) + && GLRO(dl_verbose))) + { + const char *strtab; + + strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); + _dl_error_printf ("\ +%s: Symbol `%s' has different size in shared object, consider re-linking\n", + rtld_progname ?: "<program name unknown>", + strtab + refsym->st_name); + } + memcpy (reloc_addr, (void *) value, + MIN (sym->st_size, refsym->st_size)); + break; + } +#endif + +#if !defined RTLD_BOOTSTRAP + case R_LARCH_RELATIVE: + *addr_field = map->l_addr + reloc->r_addend; + break; +#endif I think this is copied from riscv but its relocation code is probably not the best reference. sysdeps/m68k/dl-machine.h may be one of the better implementations for the relocation switch table. In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are needed in this function. There should be none of NONE, RELATIVE, IRELATIVE, absolute relocation types, etc (RELATIVE is handled elsewhere). GNU ld, in the presence of a bug, may produce spurious NONE relocations. Not handling NONE can catch some bugs. *R_LARCH_64 and **R_68K_GLOB_DAT do the same thing. * *Thanks. * loongarch: m68k: 165 switch (r_type) |228 switch (r_type) 166 { |229 { 167 |230 *case R_68K_GLOB_DAT*: 168 case R_LARCH_JUMP_SLOT: |231 case R_68K_JMP_SLOT: 169 *case __WORDSIZE == 64 ? R_LARCH_64:* |232 **reloc_addr = value;* 170 R_LARCH_32: |233 break; 171 **addr_field = value;* |234 #ifndef RTLD_BOOTSTRAP 172 break; |235 case R_68K_COPY: *>>>>>>>>>>>>>>>>* *diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h index 6ec9a403d3..31111a7372 100644 --- a/sysdeps/loongarch/dl-machine.h +++ b/sysdeps/loongarch/dl-machine.h @@ -164,26 +164,28 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], switch (r_type) { + + case R_LARCH_JUMP_SLOT: + case __WORDSIZE == 64 ? R_LARCH_64: + R_LARCH_32: + *addr_field = value; + break; + #ifndef RTLD_BOOTSTRAP case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: R_LARCH_TLS_DTPMOD32: - if (sym_map) - *addr_field = sym_map->l_tls_modid; + *addr_field = sym_map->l_tls_modid; break; case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: R_LARCH_TLS_DTPREL32: - if (sym != NULL) - *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; break; case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: R_LARCH_TLS_TPREL32: - if (sym != NULL) - { - CHECK_STATIC_TLS (map, sym_map); - *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; - } + CHECK_STATIC_TLS (map, sym_map); + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; break; case R_LARCH_COPY: @@ -208,19 +210,10 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], MIN (sym->st_size, refsym->st_size)); break; } -#endif -#if !defined RTLD_BOOTSTRAP case R_LARCH_RELATIVE: *addr_field = map->l_addr + reloc->r_addend; break; -#endif - - case R_LARCH_JUMP_SLOT: - case __WORDSIZE == 64 ? R_LARCH_64: - R_LARCH_32: - *addr_field = value; - break; case R_LARCH_IRELATIVE: value = map->l_addr + reloc->r_addend; @@ -231,6 +224,7 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], case R_LARCH_NONE: break; +#endif default: _dl_reloc_bad_type (map, r_type, 0); * *<<<<<<<<<<<<<< * 在 2022/6/6 上午7:55, Fangrui Song 写道: > On 2022-06-01, caiyinyu wrote: >> --- >> sysdeps/loongarch/__longjmp.S | 52 ++++ >> sysdeps/loongarch/bits/endianness.h | 11 + >> sysdeps/loongarch/bits/link.h | 58 ++++ >> sysdeps/loongarch/bits/setjmp.h | 42 +++ >> sysdeps/loongarch/bsd-_setjmp.c | 1 + >> sysdeps/loongarch/bsd-setjmp.c | 1 + >> sysdeps/loongarch/dl-machine.h | 307 +++++++++++++++++++ >> sysdeps/loongarch/dl-trampoline.S | 91 ++++++ >> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++ >> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++ >> sysdeps/loongarch/ldsodefs.h | 41 +++ >> sysdeps/loongarch/linkmap.h | 22 ++ >> sysdeps/loongarch/machine-gmon.h | 37 +++ >> sysdeps/loongarch/setjmp.S | 66 ++++ >> sysdeps/loongarch/sotruss-lib.c | 50 +++ >> sysdeps/loongarch/start.S | 67 ++++ >> sysdeps/loongarch/sys/asm.h | 59 ++++ >> sysdeps/loongarch/tst-audit.h | 23 ++ >> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++ >> 19 files changed, 1021 insertions(+) >> create mode 100644 sysdeps/loongarch/__longjmp.S >> create mode 100644 sysdeps/loongarch/bits/endianness.h >> create mode 100644 sysdeps/loongarch/bits/link.h >> create mode 100644 sysdeps/loongarch/bits/setjmp.h >> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c >> create mode 100644 sysdeps/loongarch/bsd-setjmp.c >> create mode 100644 sysdeps/loongarch/dl-machine.h >> create mode 100644 sysdeps/loongarch/dl-trampoline.S >> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h >> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h >> create mode 100644 sysdeps/loongarch/ldsodefs.h >> create mode 100644 sysdeps/loongarch/linkmap.h >> create mode 100644 sysdeps/loongarch/machine-gmon.h >> create mode 100644 sysdeps/loongarch/setjmp.S >> create mode 100644 sysdeps/loongarch/sotruss-lib.c >> create mode 100644 sysdeps/loongarch/start.S >> create mode 100644 sysdeps/loongarch/sys/asm.h >> create mode 100644 sysdeps/loongarch/tst-audit.h >> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> >> diff --git a/sysdeps/loongarch/__longjmp.S >> b/sysdeps/loongarch/__longjmp.S >> new file mode 100644 >> index 0000000000..b7690dd94f >> --- /dev/null >> +++ b/sysdeps/loongarch/__longjmp.S >> @@ -0,0 +1,52 @@ >> +/* longjmp. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <sysdep.h> >> +#include <sys/asm.h> >> + >> +ENTRY (__longjmp) >> + REG_L ra, a0, 0*SZREG >> + REG_L sp, a0, 1*SZREG >> + REG_L x, a0, 2*SZREG >> + REG_L fp, a0, 3*SZREG >> + REG_L s0, a0, 4*SZREG >> + REG_L s1, a0, 5*SZREG >> + REG_L s2, a0, 6*SZREG >> + REG_L s3, a0, 7*SZREG >> + REG_L s4, a0, 8*SZREG >> + REG_L s5, a0, 9*SZREG >> + REG_L s6, a0, 10*SZREG >> + REG_L s7, a0, 11*SZREG >> + REG_L s8, a0, 12*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_L $f24, a0, 13*SZREG + 0*SZFREG >> + FREG_L $f25, a0, 13*SZREG + 1*SZFREG >> + FREG_L $f26, a0, 13*SZREG + 2*SZFREG >> + FREG_L $f27, a0, 13*SZREG + 3*SZFREG >> + FREG_L $f28, a0, 13*SZREG + 4*SZFREG >> + FREG_L $f29, a0, 13*SZREG + 5*SZFREG >> + FREG_L $f30, a0, 13*SZREG + 6*SZFREG >> + FREG_L $f31, a0, 13*SZREG + 7*SZFREG >> +#endif >> + >> + sltui a0,a1,1 >> + ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 >> + jirl zero,ra,0 >> + >> +END (__longjmp) >> diff --git a/sysdeps/loongarch/bits/endianness.h >> b/sysdeps/loongarch/bits/endianness.h >> new file mode 100644 >> index 0000000000..7290be7b18 >> --- /dev/null >> +++ b/sysdeps/loongarch/bits/endianness.h >> @@ -0,0 +1,11 @@ >> +#ifndef _BITS_ENDIANNESS_H >> +#define _BITS_ENDIANNESS_H 1 >> + >> +#ifndef _BITS_ENDIAN_H >> +#error "Never use <bits/endianness.h> directly; include <endian.h> >> instead." >> +#endif >> + >> +/* LoongArch is little-endian. */ >> +#define __BYTE_ORDER __LITTLE_ENDIAN >> + >> +#endif /* bits/endianness.h */ >> diff --git a/sysdeps/loongarch/bits/link.h >> b/sysdeps/loongarch/bits/link.h >> new file mode 100644 >> index 0000000000..4df09989cb >> --- /dev/null >> +++ b/sysdeps/loongarch/bits/link.h >> @@ -0,0 +1,58 @@ >> +/* Machine-specific declarations for dynamic linker interface. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _LINK_H >> +#error "Never include <bits/link.h> directly; use <link.h> instead." >> +#endif >> + >> +typedef struct La_loongarch_regs >> +{ >> + unsigned long int lr_reg[8]; /* a0 - a7 */ >> + double lr_fpreg[8]; /* fa0 - fa7 */ >> + unsigned long int lr_ra; >> + unsigned long int lr_sp; >> +} La_loongarch_regs; >> + >> +/* Return values for calls from PLT on LoongArch. */ >> +typedef struct La_loongarch_retval >> +{ >> + unsigned long int lrv_a0; >> + unsigned long int lrv_a1; >> + double lrv_fa0; >> + double lrv_fa1; >> +} La_loongarch_retval; >> + >> +__BEGIN_DECLS >> + >> +extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, >> + unsigned int __ndx, >> + uintptr_t *__refcook, >> + uintptr_t *__defcook, >> + La_loongarch_regs *__regs, >> + unsigned int *__flags, >> + const char *__symname, >> + long int *__framesizep); >> +extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, >> + unsigned int __ndx, >> + uintptr_t *__refcook, >> + uintptr_t *__defcook, >> + const La_loongarch_regs *__inregs, >> + La_loongarch_retval *__outregs, >> + const char *__symname); >> + >> +__END_DECLS >> diff --git a/sysdeps/loongarch/bits/setjmp.h >> b/sysdeps/loongarch/bits/setjmp.h >> new file mode 100644 >> index 0000000000..8b323ad2b6 >> --- /dev/null >> +++ b/sysdeps/loongarch/bits/setjmp.h >> @@ -0,0 +1,42 @@ >> +/* Define the machine-dependent type `jmp_buf'. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _LOONGARCH_BITS_SETJMP_H >> +#define _LOONGARCH_BITS_SETJMP_H >> + >> +typedef struct __jmp_buf_internal_tag >> +{ >> + /* Program counter. */ >> + long int __pc; >> + /* Stack pointer. */ >> + long int __sp; >> + /* Reserved */ >> + long int __x; >> + /* Frame pointer. */ >> + long int __fp; >> + /* Callee-saved registers. */ >> + long int __regs[9]; >> + >> +#ifndef __loongarch_soft_float >> + /* Callee-saved floating point registers. */ >> + double __fpregs[8]; >> +#endif >> + >> +} __jmp_buf[1]; >> + >> +#endif /* _LOONGARCH_BITS_SETJMP_H */ >> diff --git a/sysdeps/loongarch/bsd-_setjmp.c >> b/sysdeps/loongarch/bsd-_setjmp.c >> new file mode 100644 >> index 0000000000..32f49441c3 >> --- /dev/null >> +++ b/sysdeps/loongarch/bsd-_setjmp.c >> @@ -0,0 +1 @@ >> +/* _setjmp is implemented in setjmp.S. */ >> diff --git a/sysdeps/loongarch/bsd-setjmp.c >> b/sysdeps/loongarch/bsd-setjmp.c >> new file mode 100644 >> index 0000000000..45fd802aac >> --- /dev/null >> +++ b/sysdeps/loongarch/bsd-setjmp.c >> @@ -0,0 +1 @@ >> +/* setjmp is implemented in setjmp.S. */ >> diff --git a/sysdeps/loongarch/dl-machine.h >> b/sysdeps/loongarch/dl-machine.h >> new file mode 100644 >> index 0000000000..4e19ad9319 >> --- /dev/null >> +++ b/sysdeps/loongarch/dl-machine.h >> @@ -0,0 +1,307 @@ >> +/* Machine-dependent ELF dynamic relocation inline functions. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef dl_machine_h >> +#define dl_machine_h >> + >> +#define ELF_MACHINE_NAME "LoongArch" >> + >> +#include <entry.h> >> +#include <elf/elf.h> >> +#include <sys/asm.h> >> +#include <dl-tls.h> >> +#include <dl-static-tls.h> >> +#include <dl-machine-rel.h> >> + >> +#ifndef _RTLD_PROLOGUE >> +# define _RTLD_PROLOGUE(entry) \ >> + ".globl\t" __STRING (entry) "\n\t" \ >> + ".type\t" __STRING (entry) ", @function\n\t" \ >> + CFI_STARTPROC "\n" \ >> + __STRING (entry) ":\n" >> +#endif >> + >> +#ifndef _RTLD_EPILOGUE >> +# define _RTLD_EPILOGUE(entry) \ >> + CFI_ENDPROC "\n\t" \ >> + ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" >> +#endif >> + >> +#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT >> +#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE >> + >> +#define elf_machine_type_class(type) \ >> + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ > > Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list > seems an unneeded hack for many ports. Can you check does loongarch > really need them? > >> + | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) >> + >> +#define ELF_MACHINE_NO_REL 1 >> +#define ELF_MACHINE_NO_RELA 0 >> + >> +/* Return nonzero iff ELF header is compatible with the running >> host. */ >> +static inline int >> +elf_machine_matches_host (const ElfW (Ehdr) * ehdr) >> +{ >> + /* We can only run LoongArch binaries. */ >> + if (ehdr->e_machine != EM_LOONGARCH) >> + return 0; >> + >> + return 1; >> +} >> + >> +/* Return the run-time load address of the shared object. */ >> +static inline ElfW (Addr) elf_machine_load_address (void) >> +{ >> + extern const ElfW(Ehdr) __ehdr_start attribute_hidden; >> + return (ElfW(Addr)) &__ehdr_start; >> +} >> + >> +/* Return the link-time address of _DYNAMIC. */ >> +static inline ElfW (Addr) elf_machine_dynamic (void) >> +{ >> + extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; >> + return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); >> +} >> + >> +/* Initial entry point code for the dynamic linker. >> + The C function `_dl_start' is the real entry point; >> + its return value is the user program's entry point. */ >> + >> +#define RTLD_START \ >> + asm(".text\n\ >> + " _RTLD_PROLOGUE (ENTRY_POINT) "\ >> + .cfi_label .Ldummy \n\ >> + " CFI_UNDEFINED (1) " \n\ >> + or $a0, $sp, $zero \n\ >> + bl _dl_start \n\ >> + # Stash user entry point in s0. \n\ >> + or $s0, $v0, $zero \n\ >> + # Load the original argument count. \n\ >> + ld.d $a1, $sp, 0 \n\ >> + # Call _dl_init (struct link_map *main_map, int argc, char >> **argv, \ >> + char **env) \n\ >> + la $a0, _rtld_local \n\ >> + ld.d $a0, $a0, 0 \n\ >> + addi.d $a2, $sp, 8 \n\ >> + slli.d $a3, $a1, 3 \n\ >> + add.d $a3, $a3, $a2 \n\ >> + addi.d $a3, $a3, 8 \n\ > > The _dl_init seems much more complex than the riscv counterpart. > >> + # Adjust $sp for 16-aligned \n\ >> + srli.d $t0, $sp, 4 \n\ >> + slli.d $t0, $t0, 4 \n\ >> + ori $t1, $sp, 0 \n\ >> + addi.d $sp, $t0, -32 \n\ >> + st.d $t1, $sp, 24 \n\ > > Seems too complex. > >> + # Call the function to run the initializers. \n\ >> + bl _dl_init \n\ >> + # Pass our finalizer function to _start. \n\ >> + ld.d $sp, $sp, 24 \n\ >> + la $a0, _dl_fini \n\ >> + # Jump to the user entry point. \n\ >> + jirl $zero, $s0, 0 \n\ >> + " _RTLD_EPILOGUE (ENTRY_POINT) "\ >> + .previous"); >> + >> +/* Names of the architecture-specific auditing callback functions. */ >> +#define ARCH_LA_PLTENTER loongarch_gnu_pltenter >> +#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit >> + >> +/* Bias .got.plt entry by the offset requested by the PLT header. */ >> +#define elf_machine_plt_value(map, reloc, value) (value) >> + >> +static inline ElfW (Addr) >> +elf_machine_fixup_plt (struct link_map *map, lookup_t t, >> + const ElfW (Sym) * refsym, const ElfW (Sym) * sym, >> + const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, >> + ElfW (Addr) value) >> +{ >> + return *reloc_addr = value; >> +} >> + >> +#endif /* !dl_machine_h */ >> + >> +#ifdef RESOLVE_MAP >> + >> +/* Perform a relocation described by R_INFO at the location pointed to >> + by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and >> + MAP is the object containing the reloc. */ >> + >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >> + const ElfW (Rela) * reloc, >> + const ElfW (Sym) * sym, > > Seems excess space after `*` > >> + const struct r_found_version *version, >> + void *const reloc_addr, int skip_ifunc) >> +{ >> + ElfW (Addr) r_info = reloc->r_info; >> + const unsigned long int r_type = ELFW (R_TYPE) (r_info); >> + ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; >> + const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; >> + struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, >> r_type); >> + ElfW (Addr) value = 0; >> + if (sym_map != NULL) >> + value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; >> + >> + if (sym != NULL >> + && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == >> STT_GNU_IFUNC) >> + && __glibc_likely (sym->st_shndx != SHN_UNDEF) >> + && __glibc_likely (!skip_ifunc)) >> + value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); >> + >> + switch (r_type) >> + { >> +#ifndef RTLD_BOOTSTRAP >> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: >> + R_LARCH_TLS_DTPMOD32: >> + if (sym_map) >> + *addr_field = sym_map->l_tls_modid; >> + break; > > I know many ports do `if (sym_map)` but that seems (a) a workaround > for possibly > GNU ld bugs or (b) unneeded cargo cult. > > The check should better be removed. > > This applies to various TLS dynamic relocations below. > >> + >> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: >> + R_LARCH_TLS_DTPREL32: >> + if (sym != NULL) >> + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; >> + break; >> + >> + case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: >> + R_LARCH_TLS_TPREL32: >> + if (sym != NULL) >> + { >> + CHECK_STATIC_TLS (map, sym_map); >> + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; >> + } >> + break; >> + >> + case R_LARCH_COPY: >> + { >> + if (sym == NULL) >> + /* This can happen in trace mode if an object could not be >> + found. */ >> + break; >> + if (__glibc_unlikely (sym->st_size > refsym->st_size) >> + || (__glibc_unlikely (sym->st_size < refsym->st_size) >> + && GLRO(dl_verbose))) >> + { >> + const char *strtab; >> + >> + strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); >> + _dl_error_printf ("\ >> +%s: Symbol `%s' has different size in shared object, consider >> re-linking\n", >> + rtld_progname ?: "<program name unknown>", >> + strtab + refsym->st_name); >> + } >> + memcpy (reloc_addr, (void *) value, >> + MIN (sym->st_size, refsym->st_size)); >> + break; >> + } >> +#endif >> + >> +#if !defined RTLD_BOOTSTRAP >> + case R_LARCH_RELATIVE: >> + *addr_field = map->l_addr + reloc->r_addend; >> + break; >> +#endif > > I think this is copied from riscv but its relocation code is probably > not the best reference. sysdeps/m68k/dl-machine.h may be one of the > better implementations for the relocation switch table. > > In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are > needed in this function. There should be none of NONE, RELATIVE, > IRELATIVE, absolute relocation types, etc (RELATIVE is handled > elsewhere). > > GNU ld, in the presence of a bug, may produce spurious NONE relocations. > Not handling NONE can catch some bugs. > >> + case R_LARCH_JUMP_SLOT: >> + case __WORDSIZE == 64 ? R_LARCH_64: >> + R_LARCH_32: >> + *addr_field = value; >> + break; >> + >> + case R_LARCH_IRELATIVE: >> + value = map->l_addr + reloc->r_addend; >> + if (__glibc_likely (!skip_ifunc)) >> + value = ((ElfW (Addr) (*) (void)) value) (); >> + *addr_field = value; >> + break; >> + >> + case R_LARCH_NONE: >> + break; >> + >> + default: >> + _dl_reloc_bad_type (map, r_type, 0); >> + break; >> + } >> +} >> + >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * >> reloc, >> + void *const reloc_addr) >> +{ >> + *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; >> +} >> + >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem >> *scope[], >> + ElfW (Addr) l_addr, >> + const ElfW (Rela) * reloc, int skip_ifunc) >> +{ >> + ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset); >> + const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); >> + >> + /* Check for unexpected PLT reloc type. */ >> + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >> + { >> + if (__glibc_unlikely (map->l_mach.plt == 0)) >> + { >> + if (l_addr) >> + *reloc_addr += l_addr; >> + } >> + else >> + *reloc_addr = map->l_mach.plt; >> + } >> + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > > This is a design issue of ifunc for many ports. > Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in > .rela.plt, then you can remove this branch. > >> + { >> + ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); >> + if (__glibc_likely (!skip_ifunc)) >> + value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); >> + *reloc_addr = (ElfW (Addr)) value; >> + } >> + else >> + _dl_reloc_bad_type (map, r_type, 1); >> +} >> + >> +/* Set up the loaded object described by L so its stub function >> + will jump to the on-demand fixup code __dl_runtime_resolve. */ >> + >> +static inline int __attribute__ ((always_inline)) >> +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem >> *scope[], >> + int lazy, int profile) >> +{ >> +#ifndef RTLD_BOOTSTRAP >> + /* If using PLTs, fill in the first two entries of .got.plt. */ >> + if (l->l_info[DT_JMPREL]) >> + { >> + extern void _dl_runtime_resolve (void) >> + __attribute__ ((visibility ("hidden"))); >> + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, >> l_info[DT_PLTGOT]); >> + gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; >> + gotplt[1] = (ElfW (Addr)) l; >> + } >> +#endif >> + >> + return lazy; >> +} >> + >> +#endif /* RESOLVE_MAP */ >> diff --git a/sysdeps/loongarch/dl-trampoline.S >> b/sysdeps/loongarch/dl-trampoline.S >> new file mode 100644 >> index 0000000000..eb610392f6 >> --- /dev/null >> +++ b/sysdeps/loongarch/dl-trampoline.S >> @@ -0,0 +1,91 @@ >> +/* PLT trampolines. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <sysdep.h> >> +#include <sys/asm.h> >> + >> +/* Assembler veneer called from the PLT header code for lazy loading. >> + The PLT header passes its own args in t0-t2. */ >> + >> +#ifdef __loongarch_soft_float >> +# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) >> +#else >> +# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) >> +#endif >> + >> +ENTRY (_dl_runtime_resolve) >> + >> + /* Save arguments to stack. */ >> + ADDI sp, sp, -FRAME_SIZE >> + >> + REG_S ra, sp, 9*SZREG >> + REG_S a0, sp, 1*SZREG >> + REG_S a1, sp, 2*SZREG >> + REG_S a2, sp, 3*SZREG >> + REG_S a3, sp, 4*SZREG >> + REG_S a4, sp, 5*SZREG >> + REG_S a5, sp, 6*SZREG >> + REG_S a6, sp, 7*SZREG >> + REG_S a7, sp, 8*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_S fa0, sp, 10*SZREG + 0*SZFREG >> + FREG_S fa1, sp, 10*SZREG + 1*SZFREG >> + FREG_S fa2, sp, 10*SZREG + 2*SZFREG >> + FREG_S fa3, sp, 10*SZREG + 3*SZFREG >> + FREG_S fa4, sp, 10*SZREG + 4*SZFREG >> + FREG_S fa5, sp, 10*SZREG + 5*SZFREG >> + FREG_S fa6, sp, 10*SZREG + 6*SZFREG >> + FREG_S fa7, sp, 10*SZREG + 7*SZFREG >> +#endif >> + >> + /* Update .got.plt and obtain runtime address of callee */ >> + SLLI a1, t1, 1 >> + or a0, t0, zero >> + ADD a1, a1, t1 >> + la a2, _dl_fixup >> + jirl ra, a2, 0 >> + or t1, v0, zero >> + >> + /* Restore arguments from stack. */ >> + REG_L ra, sp, 9*SZREG >> + REG_L a0, sp, 1*SZREG >> + REG_L a1, sp, 2*SZREG >> + REG_L a2, sp, 3*SZREG >> + REG_L a3, sp, 4*SZREG >> + REG_L a4, sp, 5*SZREG >> + REG_L a5, sp, 6*SZREG >> + REG_L a6, sp, 7*SZREG >> + REG_L a7, sp, 8*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_L fa0, sp, 10*SZREG + 0*SZFREG >> + FREG_L fa1, sp, 10*SZREG + 1*SZFREG >> + FREG_L fa2, sp, 10*SZREG + 2*SZFREG >> + FREG_L fa3, sp, 10*SZREG + 3*SZFREG >> + FREG_L fa4, sp, 10*SZREG + 4*SZFREG >> + FREG_L fa5, sp, 10*SZREG + 5*SZFREG >> + FREG_L fa6, sp, 10*SZREG + 6*SZFREG >> + FREG_L fa7, sp, 10*SZREG + 7*SZFREG >> +#endif >> + >> + ADDI sp, sp, FRAME_SIZE >> + >> + /* Invoke the callee. */ >> + jirl zero, t1, 0 >> +END (_dl_runtime_resolve) >> diff --git a/sysdeps/loongarch/jmpbuf-offsets.h >> b/sysdeps/loongarch/jmpbuf-offsets.h >> new file mode 100644 >> index 0000000000..a4b8ea690e >> --- /dev/null >> +++ b/sysdeps/loongarch/jmpbuf-offsets.h >> @@ -0,0 +1,22 @@ >> +/* Private macros for accessing __jmp_buf contents. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> License as >> + published by the Free Software Foundation; either version 2.1 of the >> + License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <jmpbuf-unwind.h> >> + >> +/* Helper for generic ____longjmp_chk(). */ >> +#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) >> diff --git a/sysdeps/loongarch/jmpbuf-unwind.h >> b/sysdeps/loongarch/jmpbuf-unwind.h >> new file mode 100644 >> index 0000000000..6fa509151d >> --- /dev/null >> +++ b/sysdeps/loongarch/jmpbuf-unwind.h >> @@ -0,0 +1,45 @@ >> +/* Examine __jmp_buf for unwinding frames. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <setjmp.h> >> +#include <stdint.h> >> +#include <unwind.h> >> +#include <sysdep.h> >> + >> +/* Test if longjmp to JMPBUF would unwind the frame >> + containing a local variable at ADDRESS. */ >> +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ >> + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) >> + >> +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ >> + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), >> _adj) >> + >> +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp >> (__jmp_buf regs) >> +{ >> + uintptr_t sp = regs[0].__sp; >> +#ifdef PTR_DEMANGLE >> + PTR_DEMANGLE (sp); >> +#endif >> + return sp; >> +} >> + >> +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ >> + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) >> + >> +/* We use the normal longjmp for unwinding. */ >> +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) >> diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h >> new file mode 100644 >> index 0000000000..36b1b25b9f >> --- /dev/null >> +++ b/sysdeps/loongarch/ldsodefs.h >> @@ -0,0 +1,41 @@ >> +/* Run-time dynamic linker data structures for loaded ELF shared >> objects. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _LOONGARCH_LDSODEFS_H >> +#define _LOONGARCH_LDSODEFS_H 1 >> + >> +#include <elf.h> >> + >> +struct La_loongarch_regs; >> +struct La_loongarch_retval; >> + >> +#define ARCH_PLTENTER_MEMBERS \ >> + ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \ >> + uintptr_t *, uintptr_t *, \ >> + const struct La_loongarch_regs *, \ >> + unsigned int *, const char *name, \ >> + long int *framesizep); >> + >> +#define ARCH_PLTEXIT_MEMBERS \ >> + unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \ >> + uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ >> + struct La_loongarch_retval *, const char *); >> + >> +#include_next <ldsodefs.h> >> + >> +#endif >> diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h >> new file mode 100644 >> index 0000000000..bbba73ed70 >> --- /dev/null >> +++ b/sysdeps/loongarch/linkmap.h >> @@ -0,0 +1,22 @@ >> +/* Definition of link_map_machine. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +struct link_map_machine >> +{ >> + ElfW (Addr) plt; /* Address of .plt. */ >> +}; >> diff --git a/sysdeps/loongarch/machine-gmon.h >> b/sysdeps/loongarch/machine-gmon.h >> new file mode 100644 >> index 0000000000..4a3cdd964e >> --- /dev/null >> +++ b/sysdeps/loongarch/machine-gmon.h >> @@ -0,0 +1,37 @@ >> +/* LoongArch definitions for profiling support. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library; if not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +/* Accept 'frompc' address as argument from the function that calls >> + _mcount for profiling. Use __builtin_return_address (0) >> + for the 'selfpc' address. */ >> + >> +#include <sysdep.h> >> + >> +static void mcount_internal (unsigned long int frompc, >> + unsigned long int selfpc); >> + >> +#define _MCOUNT_DECL(frompc, selfpc) \ >> + static inline void mcount_internal (unsigned long int frompc, \ >> + unsigned long int selfpc) >> + >> +#define MCOUNT \ >> + void _mcount (void *frompc) \ >> + { \ >> + mcount_internal ((unsigned long int) frompc, \ >> + (unsigned long int) RETURN_ADDRESS (0)); \ >> + } >> diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S >> new file mode 100644 >> index 0000000000..b93ae2f5da >> --- /dev/null >> +++ b/sysdeps/loongarch/setjmp.S >> @@ -0,0 +1,66 @@ >> +/* setjmp for LoongArch. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#include <sysdep.h> >> +#include <sys/asm.h> >> + >> +ENTRY (_setjmp) >> + li.w a1,0 >> + b __sigsetjmp >> +END (_setjmp) >> + >> +ENTRY (setjmp) >> + li.w a1,1 >> +END (setjmp) >> + >> +ENTRY (__sigsetjmp) >> + REG_S ra, a0, 0*SZREG >> + REG_S sp, a0, 1*SZREG >> + REG_S x, a0, 2*SZREG >> + REG_S fp, a0, 3*SZREG >> + REG_S s0, a0, 4*SZREG >> + REG_S s1, a0, 5*SZREG >> + REG_S s2, a0, 6*SZREG >> + REG_S s3, a0, 7*SZREG >> + REG_S s4, a0, 8*SZREG >> + REG_S s5, a0, 9*SZREG >> + REG_S s6, a0, 10*SZREG >> + REG_S s7, a0, 11*SZREG >> + REG_S s8, a0, 12*SZREG >> + >> +#ifndef __loongarch_soft_float >> + FREG_S $f24, a0, 13*SZREG + 0*SZFREG >> + FREG_S $f25, a0, 13*SZREG + 1*SZFREG >> + FREG_S $f26, a0, 13*SZREG + 2*SZFREG >> + FREG_S $f27, a0, 13*SZREG + 3*SZFREG >> + FREG_S $f28, a0, 13*SZREG + 4*SZFREG >> + FREG_S $f29, a0, 13*SZREG + 5*SZFREG >> + FREG_S $f30, a0, 13*SZREG + 6*SZFREG >> + FREG_S $f31, a0, 13*SZREG + 7*SZFREG >> +#endif >> + >> +#if !IS_IN (libc) && IS_IN(rtld) >> + li.w v0, 0 >> + jirl zero,ra,0 >> +#else >> + b __sigjmp_save >> +#endif >> +END (__sigsetjmp) >> + >> +hidden_def (__sigsetjmp) >> +weak_alias (_setjmp, __GI__setjmp) >> diff --git a/sysdeps/loongarch/sotruss-lib.c >> b/sysdeps/loongarch/sotruss-lib.c >> new file mode 100644 >> index 0000000000..5b15f4815a >> --- /dev/null >> +++ b/sysdeps/loongarch/sotruss-lib.c >> @@ -0,0 +1,50 @@ >> +/* Override generic sotruss-lib.c to define actual functions for >> LoongArch. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#define HAVE_ARCH_PLTENTER >> +#define HAVE_ARCH_PLTEXIT >> + >> +#include <elf/sotruss-lib.c> >> + >> +ElfW (Addr) >> +la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), >> + unsigned int ndx __attribute__ ((unused)), >> + uintptr_t *refcook, uintptr_t *defcook, >> + La_loongarch_regs *regs, unsigned int *flags, >> + const char *symname, long int *framesizep) >> +{ >> + print_enter (refcook, defcook, symname, regs->lr_reg[0], >> regs->lr_reg[1], >> + regs->lr_reg[2], *flags); >> + >> + /* No need to copy anything, we will not need the parameters in >> any case. */ >> + *framesizep = 0; >> + >> + return sym->st_value; >> +} >> + >> +unsigned int >> +la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, >> + uintptr_t *refcook, uintptr_t *defcook, >> + const struct La_loongarch_regs *inregs, >> + struct La_loongarch_retval *outregs, >> + const char *symname) >> +{ >> + print_exit (refcook, defcook, symname, outregs->lrv_a0); >> + >> + return 0; >> +} >> diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S >> new file mode 100644 >> index 0000000000..a9b32aa966 >> --- /dev/null >> +++ b/sysdeps/loongarch/start.S >> @@ -0,0 +1,67 @@ >> +/* Startup code compliant to the ELF LoongArch ABI. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#define __ASSEMBLY__ 1 >> +#include <entry.h> >> +#include <sys/asm.h> >> + >> +/* The entry point's job is to call __libc_start_main. Per the ABI, >> + a0 contains the address of a function to be passed to atexit. >> + __libc_start_main wants this in a5. */ >> + >> +/* >> +int >> +__libc_start_main (int (*main) (int, char **, char **), >> + int argc, >> + char **argv, >> + __typeof (main) init, >> + void (*fini) (void), >> + void (*rtld_fini) (void), >> + void *stack_end); >> + */ >> + >> +ENTRY (ENTRY_POINT) >> + >> +/* Terminate call stack by noting ra is undefined. Use a dummy >> + .cfi_label to force starting the FDE. */ >> + .cfi_label .Ldummy >> + cfi_undefined (1) >> + or a5, a0, zero /* rtld_fini */ >> + >> +/* We must get symbol main through GOT table, since main may not be >> local. >> + For instance: googletest defines main in dynamic library. */ >> + la.got a0, t0, main >> + REG_L a1, sp, 0 >> + ADDI a2, sp, SZREG >> + >> + /* Adjust $sp for 16-aligned */ >> + SRLI sp, sp, 4 >> + SLLI sp, sp, 4 >> + >> + move a3, zero /* used to be init */ >> + move a4, zero /* used to be fini */ >> + or a6, sp, zero /* stack_end */ >> + >> + la.got ra, t0, __libc_start_main >> + jirl ra, ra, 0 >> + >> + la.got ra, t0, abort >> + jirl ra, ra, 0 >> +END (ENTRY_POINT) >> + >> diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h >> new file mode 100644 >> index 0000000000..b41ee59694 >> --- /dev/null >> +++ b/sysdeps/loongarch/sys/asm.h >> @@ -0,0 +1,59 @@ >> +/* Miscellaneous macros. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#ifndef _SYS_ASM_H >> +#define _SYS_ASM_H >> + >> +#include <sys/regdef.h> >> +#include <sysdeps/generic/sysdep.h> >> + >> +/* Macros to handle different pointer/register sizes for 32/64-bit >> code. */ >> +#define SZREG 8 >> +#define SZFREG 8 >> +#define REG_L ld.d >> +#define REG_S st.d >> +#define SRLI srli.d >> +#define SLLI slli.d >> +#define ADDI addi.d >> +#define ADD add.d >> +#define BSTRINS bstrins.d >> +#define LI li.d >> +#define FREG_L fld.d >> +#define FREG_S fst.d >> + >> +/* Declare leaf routine. */ >> +#define LEAF(symbol) \ >> + .text; \ >> + .globl symbol; \ >> + .align 3; \ >> + cfi_startproc; \ >> + .type symbol, @function; \ >> + symbol: >> + >> +#define ENTRY(symbol) LEAF (symbol) >> + >> +/* Mark end of function. */ >> +#undef END >> +#define END(function) \ >> + cfi_endproc; \ >> + .size function, .- function; >> + >> +/* Stack alignment. */ >> +#define ALMASK ~15 >> + >> +#endif /* sys/asm.h */ >> diff --git a/sysdeps/loongarch/tst-audit.h >> b/sysdeps/loongarch/tst-audit.h >> new file mode 100644 >> index 0000000000..e71948c86e >> --- /dev/null >> +++ b/sysdeps/loongarch/tst-audit.h >> @@ -0,0 +1,23 @@ >> +/* Definitions for testing PLT entry/exit auditing. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <https://www.gnu.org/licenses/>. */ >> + >> +#define pltenter la_loongarch_gnu_pltenter >> +#define pltexit la_loongarch_gnu_pltexit >> +#define La_regs La_loongarch_regs >> +#define La_retval La_loongarch_retval >> +#define int_retval lrv_a0 >> diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> new file mode 100644 >> index 0000000000..4887c30ca2 >> --- /dev/null >> +++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >> @@ -0,0 +1,26 @@ >> +/* ldconfig default paths and libraries. >> + Copyright (C) 2022 Free Software Foundation, Inc. >> + This file is part of the GNU C Library. >> + >> + The GNU C Library is free software; you can redistribute it and/or >> + modify it under the terms of the GNU Lesser General Public >> + License as published by the Free Software Foundation; either >> + version 2.1 of the License, or (at your option) any later version. >> + >> + The GNU C Library is distributed in the hope that it will be useful, >> + but WITHOUT ANY WARRANTY; without even the implied warranty of >> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + Lesser General Public License for more details. >> + >> + You should have received a copy of the GNU Lesser General Public >> + License along with the GNU C Library. If not, see >> + <http://www.gnu.org/licenses/>. */ >> + >> +#include <sysdeps/generic/ldconfig.h> >> + >> +#define SYSDEP_KNOWN_INTERPRETER_NAMES \ >> + { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, >> + >> +#define SYSDEP_KNOWN_LIBRARY_NAMES \ >> + { "libc.so.6", FLAG_ELF_LIBC6 }, \ >> + { "libm.so.6", FLAG_ELF_LIBC6 }, >> -- >> 2.31.1 >>
> + /* Check for unexpected PLT reloc type. */ > + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) > + { > + if (__glibc_unlikely (map->l_mach.plt == 0)) > + { > + if (l_addr) > + *reloc_addr += l_addr; > + } > + else > + *reloc_addr = map->l_mach.plt; > + } > + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > > This is a design issue of ifunc for many ports. > Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in > .rela.plt, then you can remove this branch. > > > *Definitely, for riscv, x86 and aarch64..., there are **R_*_IRELATIVEs > in their **.rela.plt.* > > *But I don't understand why "Ideally R_*_IRELATIVE relocations are > only in .rela.dyn"?* > > *Could you explain it?* > > *or we just keep it now? > * > > *Thanks.* See https://maskray.me/blog/2021-01-18-gnu-indirect-function ".rela.dyn vs .rela.plt" Conceptually .rela.plt should only have potentially lazy resolved relocations. IRELATIVE are always eager, so .rela.plt isn't applicable. In the early days things were a bit messy in the implementation, so some early ports adopting ifunc may use .rela.plt . GNU ld's PowerPC port apperas to do the right thing. All lld supported ports do the right thing. *Fixed. Now R_*_IRELATIVE relocations are only in .rela.dyn.* *new binutils:* *https://github.com/loongson/binutils-gdb/tree/dev/new_reloc* *Thanks a lot.* 在 2022/6/11 上午4:26, Fangrui Song 写道: > > On 2022-06-10, caiyinyu wrote: >> + >> +#define elf_machine_type_class(type) \ >> + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ >> >> Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list >> seems an unneeded hack for many ports. Can you check does loongarch >> really need them? >> >> *Removed*. > > Thanks. > >> *>>>>>>>>>>>>>>>* >> >> diff --git a/sysdeps/loongarch/dl-machine.h >> b/sysdeps/loongarch/dl-machine.h >> index 3beaaee117..500fe71a7e 100644 >> --- a/sysdeps/loongarch/dl-machine.h >> +++ b/sysdeps/loongarch/dl-machine.h >> @@ -47,13 +47,7 @@ >> #define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE >> >> #define elf_machine_type_class(type) \ >> - ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT \ >> - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >> - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >> - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >> - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >> - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >> - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ >> + ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT)) \ >> | (ELF_RTYPE_CLASS_COPY *((type) == R_LARCH_COPY))) >> >> #define ELF_MACHINE_NO_REL 1 >> >> *<<<<<<<<<<<<<<<<<<* >> >> * >> * >> >> +#define RTLD_START \ >> + asm(".text\n\ >> + " _RTLD_PROLOGUE (ENTRY_POINT) "\ >> + .cfi_label .Ldummy \n\ >> + " CFI_UNDEFINED (1) " \n\ >> + or $a0, $sp, $zero \n\ >> + bl _dl_start \n\ >> + # Stash user entry point in s0. \n\ >> + or $s0, $v0, $zero \n\ >> + # Load the original argument count. \n\ >> + ld.d $a1, $sp, 0 \n\ >> + # Call _dl_init (struct link_map *main_map, int argc, char >> **argv, \ >> + char **env) \n\ >> + la $a0, _rtld_local \n\ >> + ld.d $a0, $a0, 0 \n\ >> + addi.d $a2, $sp, 8 \n\ >> + slli.d $a3, $a1, 3 \n\ >> + add.d $a3, $a3, $a2 \n\ >> + addi.d $a3, $a3, 8 \n\ >> >> The _dl_init seems much more complex than the riscv counterpart. >> >> *There is no need to simplify further.* >> > > Thanks. > >>>>>>>>>>>>>>>>>>>> >> >> loongarch: >> >> 96 # Call _dl_init (struct link_map *main_map, int argc, char >> **argv, \ >> 97 char **env) \n\ >> * 98 la $a0, _rtld_local \n\ >> 99 ld.d $a0, $a0, 0 \n\ * >> *100 addi.d $a2, $sp, 8 \n\ ** >> **101 slli.d $a3, $a1, 3 \n\ ** >> **102 add.d $a3, $a3, $a2 \n\ ** >> **103 addi.d $a3, $a3, 8 \n\* >> 104 # Stash the stack pointer in s1.\n\ >> >> riscv: >> >> 112 # Call _dl_init (struct link_map *main_map, int argc, >> char **argv, char **env) \n\ >> *113 " STRINGXP (REG_L) " a0, _rtld_local\n\* >> *114 add a2, sp, " STRINGXP (SZREG) "\n\** >> **115 sll a3, a1, " STRINGXP (PTRLOG) "\n\** >> **116 add a3, a3, a2\n\** >> **117 add a3, a3, " STRINGXP (SZREG) "\n\* >> 118 # Stash the stack pointer in s1.\n\ >> >> <<<<<<<<<<<<<< >> >> >>> + # Adjust $sp for 16-aligned \n\ >>> + srli.d $t0, $sp, 4 \n\ >>> + slli.d $t0, $t0, 4 \n\ >>> + ori $t1, $sp, 0 \n\ >>> + addi.d $sp, $t0, -32 \n\ >>> + st.d $t1, $sp, 24 \n\ >> >> Seems too complex. >> >> *Fixed.* > > Thanks. > >> *>>>>>>>>>>>>>>>>>>>* >> >> *diff --git a/sysdeps/loongarch/dl-machine.h >> b/sysdeps/loongarch/dl-machine.h >> index 500fe71a7e..6ec9a403d3 100644 >> --- a/sysdeps/loongarch/dl-machine.h >> +++ b/sysdeps/loongarch/dl-machine.h >> @@ -101,16 +101,15 @@ static inline ElfW (Addr) elf_machine_dynamic >> (void) >> slli.d $a3, $a1, 3 \n\ >> add.d $a3, $a3, $a2 \n\ >> addi.d $a3, $a3, 8 \n\ >> + # Stash the stack pointer in s1.\n\ >> + or $s1, $sp, $zero \n\ >> # Adjust $sp for 16-aligned \n\ >> - srli.d $t0, $sp, 4 \n\ >> - slli.d $t0, $t0, 4 \n\ >> - ori $t1, $sp, 0 \n\ >> - addi.d $sp, $t0, -32 \n\ >> - st.d $t1, $sp, 24 \n\ >> + bstrins.d $sp, $zero, 3, 0 \n\ >> # Call the function to run the initializers. \n\ >> bl _dl_init \n\ >> + # Restore the stack pointer for _start.\n\ >> + or $sp, $s1, $zero \n\ >> # Pass our finalizer function to _start. \n\ >> - ld.d $sp, $sp, 24 \n\ >> la $a0, _dl_fini \n\ >> # Jump to the user entry point. \n\ >> jirl $zero, $s0, 0 \n\ >> * >> >> *<<<<<<<<<<<<<<<<<<* >> >> >> +static inline void __attribute__ ((always_inline)) >> +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >> + const ElfW (Rela) * reloc, >> + const ElfW (Sym) * sym, >> >> Seems excess space after `*` >> >> *Fixed all same problems.* > > Thanks. > >> + /* Check for unexpected PLT reloc type. */ >> + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >> + { >> + if (__glibc_unlikely (map->l_mach.plt == 0)) >> + { >> + if (l_addr) >> + *reloc_addr += l_addr; >> + } >> + else >> + *reloc_addr = map->l_mach.plt; >> + } >> + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) >> >> This is a design issue of ifunc for many ports. >> Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in >> .rela.plt, then you can remove this branch. >> >> >> *Definitely, for riscv, x86 and aarch64..., there are >> **R_*_IRELATIVEs in their **.rela.plt.* >> >> *But I don't understand why "Ideally R_*_IRELATIVE relocations are >> only in .rela.dyn"?* >> >> *Could you explain it?* >> >> *or we just keep it now? >> * >> >> *Thanks.* > > See https://maskray.me/blog/2021-01-18-gnu-indirect-function > ".rela.dyn vs .rela.plt" > > Conceptually .rela.plt should only have potentially lazy resolved > relocations. IRELATIVE are always eager, so .rela.plt isn't applicable. > In the early days things were a bit messy in the implementation, so > some early ports adopting ifunc may use .rela.plt . > GNU ld's PowerPC port apperas to do the right thing. > All lld supported ports do the right thing. > >> * >> * >> >> 在 2022/6/6 上午7:55, Fangrui Song 写道: >>> On 2022-06-01, caiyinyu wrote: >>>> --- >>>> sysdeps/loongarch/__longjmp.S | 52 ++++ >>>> sysdeps/loongarch/bits/endianness.h | 11 + >>>> sysdeps/loongarch/bits/link.h | 58 ++++ >>>> sysdeps/loongarch/bits/setjmp.h | 42 +++ >>>> sysdeps/loongarch/bsd-_setjmp.c | 1 + >>>> sysdeps/loongarch/bsd-setjmp.c | 1 + >>>> sysdeps/loongarch/dl-machine.h | 307 +++++++++++++++++++ >>>> sysdeps/loongarch/dl-trampoline.S | 91 ++++++ >>>> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++ >>>> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++ >>>> sysdeps/loongarch/ldsodefs.h | 41 +++ >>>> sysdeps/loongarch/linkmap.h | 22 ++ >>>> sysdeps/loongarch/machine-gmon.h | 37 +++ >>>> sysdeps/loongarch/setjmp.S | 66 ++++ >>>> sysdeps/loongarch/sotruss-lib.c | 50 +++ >>>> sysdeps/loongarch/start.S | 67 ++++ >>>> sysdeps/loongarch/sys/asm.h | 59 ++++ >>>> sysdeps/loongarch/tst-audit.h | 23 ++ >>>> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++ >>>> 19 files changed, 1021 insertions(+) >>>> create mode 100644 sysdeps/loongarch/__longjmp.S >>>> create mode 100644 sysdeps/loongarch/bits/endianness.h >>>> create mode 100644 sysdeps/loongarch/bits/link.h >>>> create mode 100644 sysdeps/loongarch/bits/setjmp.h >>>> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c >>>> create mode 100644 sysdeps/loongarch/bsd-setjmp.c >>>> create mode 100644 sysdeps/loongarch/dl-machine.h >>>> create mode 100644 sysdeps/loongarch/dl-trampoline.S >>>> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h >>>> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h >>>> create mode 100644 sysdeps/loongarch/ldsodefs.h >>>> create mode 100644 sysdeps/loongarch/linkmap.h >>>> create mode 100644 sysdeps/loongarch/machine-gmon.h >>>> create mode 100644 sysdeps/loongarch/setjmp.S >>>> create mode 100644 sysdeps/loongarch/sotruss-lib.c >>>> create mode 100644 sysdeps/loongarch/start.S >>>> create mode 100644 sysdeps/loongarch/sys/asm.h >>>> create mode 100644 sysdeps/loongarch/tst-audit.h >>>> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>> >>>> diff --git a/sysdeps/loongarch/__longjmp.S >>>> b/sysdeps/loongarch/__longjmp.S >>>> new file mode 100644 >>>> index 0000000000..b7690dd94f >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/__longjmp.S >>>> @@ -0,0 +1,52 @@ >>>> +/* longjmp. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#include <sysdep.h> >>>> +#include <sys/asm.h> >>>> + >>>> +ENTRY (__longjmp) >>>> + REG_L ra, a0, 0*SZREG >>>> + REG_L sp, a0, 1*SZREG >>>> + REG_L x, a0, 2*SZREG >>>> + REG_L fp, a0, 3*SZREG >>>> + REG_L s0, a0, 4*SZREG >>>> + REG_L s1, a0, 5*SZREG >>>> + REG_L s2, a0, 6*SZREG >>>> + REG_L s3, a0, 7*SZREG >>>> + REG_L s4, a0, 8*SZREG >>>> + REG_L s5, a0, 9*SZREG >>>> + REG_L s6, a0, 10*SZREG >>>> + REG_L s7, a0, 11*SZREG >>>> + REG_L s8, a0, 12*SZREG >>>> + >>>> +#ifndef __loongarch_soft_float >>>> + FREG_L $f24, a0, 13*SZREG + 0*SZFREG >>>> + FREG_L $f25, a0, 13*SZREG + 1*SZFREG >>>> + FREG_L $f26, a0, 13*SZREG + 2*SZFREG >>>> + FREG_L $f27, a0, 13*SZREG + 3*SZFREG >>>> + FREG_L $f28, a0, 13*SZREG + 4*SZFREG >>>> + FREG_L $f29, a0, 13*SZREG + 5*SZFREG >>>> + FREG_L $f30, a0, 13*SZREG + 6*SZFREG >>>> + FREG_L $f31, a0, 13*SZREG + 7*SZFREG >>>> +#endif >>>> + >>>> + sltui a0,a1,1 >>>> + ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 >>>> + jirl zero,ra,0 >>>> + >>>> +END (__longjmp) >>>> diff --git a/sysdeps/loongarch/bits/endianness.h >>>> b/sysdeps/loongarch/bits/endianness.h >>>> new file mode 100644 >>>> index 0000000000..7290be7b18 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/bits/endianness.h >>>> @@ -0,0 +1,11 @@ >>>> +#ifndef _BITS_ENDIANNESS_H >>>> +#define _BITS_ENDIANNESS_H 1 >>>> + >>>> +#ifndef _BITS_ENDIAN_H >>>> +#error "Never use <bits/endianness.h> directly; include <endian.h> >>>> instead." >>>> +#endif >>>> + >>>> +/* LoongArch is little-endian. */ >>>> +#define __BYTE_ORDER __LITTLE_ENDIAN >>>> + >>>> +#endif /* bits/endianness.h */ >>>> diff --git a/sysdeps/loongarch/bits/link.h >>>> b/sysdeps/loongarch/bits/link.h >>>> new file mode 100644 >>>> index 0000000000..4df09989cb >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/bits/link.h >>>> @@ -0,0 +1,58 @@ >>>> +/* Machine-specific declarations for dynamic linker interface. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#ifndef _LINK_H >>>> +#error "Never include <bits/link.h> directly; use <link.h> instead." >>>> +#endif >>>> + >>>> +typedef struct La_loongarch_regs >>>> +{ >>>> + unsigned long int lr_reg[8]; /* a0 - a7 */ >>>> + double lr_fpreg[8]; /* fa0 - fa7 */ >>>> + unsigned long int lr_ra; >>>> + unsigned long int lr_sp; >>>> +} La_loongarch_regs; >>>> + >>>> +/* Return values for calls from PLT on LoongArch. */ >>>> +typedef struct La_loongarch_retval >>>> +{ >>>> + unsigned long int lrv_a0; >>>> + unsigned long int lrv_a1; >>>> + double lrv_fa0; >>>> + double lrv_fa1; >>>> +} La_loongarch_retval; >>>> + >>>> +__BEGIN_DECLS >>>> + >>>> +extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, >>>> + unsigned int __ndx, >>>> + uintptr_t *__refcook, >>>> + uintptr_t *__defcook, >>>> + La_loongarch_regs *__regs, >>>> + unsigned int *__flags, >>>> + const char *__symname, >>>> + long int *__framesizep); >>>> +extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, >>>> + unsigned int __ndx, >>>> + uintptr_t *__refcook, >>>> + uintptr_t *__defcook, >>>> + const La_loongarch_regs *__inregs, >>>> + La_loongarch_retval *__outregs, >>>> + const char *__symname); >>>> + >>>> +__END_DECLS >>>> diff --git a/sysdeps/loongarch/bits/setjmp.h >>>> b/sysdeps/loongarch/bits/setjmp.h >>>> new file mode 100644 >>>> index 0000000000..8b323ad2b6 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/bits/setjmp.h >>>> @@ -0,0 +1,42 @@ >>>> +/* Define the machine-dependent type `jmp_buf'. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#ifndef _LOONGARCH_BITS_SETJMP_H >>>> +#define _LOONGARCH_BITS_SETJMP_H >>>> + >>>> +typedef struct __jmp_buf_internal_tag >>>> +{ >>>> + /* Program counter. */ >>>> + long int __pc; >>>> + /* Stack pointer. */ >>>> + long int __sp; >>>> + /* Reserved */ >>>> + long int __x; >>>> + /* Frame pointer. */ >>>> + long int __fp; >>>> + /* Callee-saved registers. */ >>>> + long int __regs[9]; >>>> + >>>> +#ifndef __loongarch_soft_float >>>> + /* Callee-saved floating point registers. */ >>>> + double __fpregs[8]; >>>> +#endif >>>> + >>>> +} __jmp_buf[1]; >>>> + >>>> +#endif /* _LOONGARCH_BITS_SETJMP_H */ >>>> diff --git a/sysdeps/loongarch/bsd-_setjmp.c >>>> b/sysdeps/loongarch/bsd-_setjmp.c >>>> new file mode 100644 >>>> index 0000000000..32f49441c3 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/bsd-_setjmp.c >>>> @@ -0,0 +1 @@ >>>> +/* _setjmp is implemented in setjmp.S. */ >>>> diff --git a/sysdeps/loongarch/bsd-setjmp.c >>>> b/sysdeps/loongarch/bsd-setjmp.c >>>> new file mode 100644 >>>> index 0000000000..45fd802aac >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/bsd-setjmp.c >>>> @@ -0,0 +1 @@ >>>> +/* setjmp is implemented in setjmp.S. */ >>>> diff --git a/sysdeps/loongarch/dl-machine.h >>>> b/sysdeps/loongarch/dl-machine.h >>>> new file mode 100644 >>>> index 0000000000..4e19ad9319 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/dl-machine.h >>>> @@ -0,0 +1,307 @@ >>>> +/* Machine-dependent ELF dynamic relocation inline functions. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#ifndef dl_machine_h >>>> +#define dl_machine_h >>>> + >>>> +#define ELF_MACHINE_NAME "LoongArch" >>>> + >>>> +#include <entry.h> >>>> +#include <elf/elf.h> >>>> +#include <sys/asm.h> >>>> +#include <dl-tls.h> >>>> +#include <dl-static-tls.h> >>>> +#include <dl-machine-rel.h> >>>> + >>>> +#ifndef _RTLD_PROLOGUE >>>> +# define _RTLD_PROLOGUE(entry) \ >>>> + ".globl\t" __STRING (entry) "\n\t" \ >>>> + ".type\t" __STRING (entry) ", @function\n\t" \ >>>> + CFI_STARTPROC "\n" \ >>>> + __STRING (entry) ":\n" >>>> +#endif >>>> + >>>> +#ifndef _RTLD_EPILOGUE >>>> +# define _RTLD_EPILOGUE(entry) \ >>>> + CFI_ENDPROC "\n\t" \ >>>> + ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" >>>> +#endif >>>> + >>>> +#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT >>>> +#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE >>>> + >>>> +#define elf_machine_type_class(type) \ >>>> + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ >>>> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ >>>> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ >>>> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ >>>> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ >>>> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ >>>> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ >>> >>> Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list >>> seems an unneeded hack for many ports. Can you check does loongarch >>> really need them? >>> >>>> + | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) >>>> + >>>> +#define ELF_MACHINE_NO_REL 1 >>>> +#define ELF_MACHINE_NO_RELA 0 >>>> + >>>> +/* Return nonzero iff ELF header is compatible with the running >>>> host. */ >>>> +static inline int >>>> +elf_machine_matches_host (const ElfW (Ehdr) * ehdr) >>>> +{ >>>> + /* We can only run LoongArch binaries. */ >>>> + if (ehdr->e_machine != EM_LOONGARCH) >>>> + return 0; >>>> + >>>> + return 1; >>>> +} >>>> + >>>> +/* Return the run-time load address of the shared object. */ >>>> +static inline ElfW (Addr) elf_machine_load_address (void) >>>> +{ >>>> + extern const ElfW(Ehdr) __ehdr_start attribute_hidden; >>>> + return (ElfW(Addr)) &__ehdr_start; >>>> +} >>>> + >>>> +/* Return the link-time address of _DYNAMIC. */ >>>> +static inline ElfW (Addr) elf_machine_dynamic (void) >>>> +{ >>>> + extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; >>>> + return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); >>>> +} >>>> + >>>> +/* Initial entry point code for the dynamic linker. >>>> + The C function `_dl_start' is the real entry point; >>>> + its return value is the user program's entry point. */ >>>> + >>>> +#define RTLD_START \ >>>> + asm(".text\n\ >>>> + " _RTLD_PROLOGUE (ENTRY_POINT) "\ >>>> + .cfi_label .Ldummy \n\ >>>> + " CFI_UNDEFINED (1) " \n\ >>>> + or $a0, $sp, $zero \n\ >>>> + bl _dl_start \n\ >>>> + # Stash user entry point in s0. \n\ >>>> + or $s0, $v0, $zero \n\ >>>> + # Load the original argument count. \n\ >>>> + ld.d $a1, $sp, 0 \n\ >>>> + # Call _dl_init (struct link_map *main_map, int argc, char >>>> **argv, \ >>>> + char **env) \n\ >>>> + la $a0, _rtld_local \n\ >>>> + ld.d $a0, $a0, 0 \n\ >>>> + addi.d $a2, $sp, 8 \n\ >>>> + slli.d $a3, $a1, 3 \n\ >>>> + add.d $a3, $a3, $a2 \n\ >>>> + addi.d $a3, $a3, 8 \n\ >>> >>> The _dl_init seems much more complex than the riscv counterpart. >>> >>>> + # Adjust $sp for 16-aligned \n\ >>>> + srli.d $t0, $sp, 4 \n\ >>>> + slli.d $t0, $t0, 4 \n\ >>>> + ori $t1, $sp, 0 \n\ >>>> + addi.d $sp, $t0, -32 \n\ >>>> + st.d $t1, $sp, 24 \n\ >>> >>> Seems too complex. >>> >>>> + # Call the function to run the initializers. \n\ >>>> + bl _dl_init \n\ >>>> + # Pass our finalizer function to _start. \n\ >>>> + ld.d $sp, $sp, 24 \n\ >>>> + la $a0, _dl_fini \n\ >>>> + # Jump to the user entry point. \n\ >>>> + jirl $zero, $s0, 0 \n\ >>>> + " _RTLD_EPILOGUE (ENTRY_POINT) "\ >>>> + .previous"); >>>> + >>>> +/* Names of the architecture-specific auditing callback >>>> functions. */ >>>> +#define ARCH_LA_PLTENTER loongarch_gnu_pltenter >>>> +#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit >>>> + >>>> +/* Bias .got.plt entry by the offset requested by the PLT header. */ >>>> +#define elf_machine_plt_value(map, reloc, value) (value) >>>> + >>>> +static inline ElfW (Addr) >>>> +elf_machine_fixup_plt (struct link_map *map, lookup_t t, >>>> + const ElfW (Sym) * refsym, const ElfW (Sym) * sym, >>>> + const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, >>>> + ElfW (Addr) value) >>>> +{ >>>> + return *reloc_addr = value; >>>> +} >>>> + >>>> +#endif /* !dl_machine_h */ >>>> + >>>> +#ifdef RESOLVE_MAP >>>> + >>>> +/* Perform a relocation described by R_INFO at the location >>>> pointed to >>>> + by RELOC_ADDR. SYM is the relocation symbol specified by >>>> R_INFO and >>>> + MAP is the object containing the reloc. */ >>>> + >>>> +static inline void __attribute__ ((always_inline)) >>>> +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], >>>> + const ElfW (Rela) * reloc, >>>> + const ElfW (Sym) * sym, >>> >>> Seems excess space after `*` >>> >>>> + const struct r_found_version *version, >>>> + void *const reloc_addr, int skip_ifunc) >>>> +{ >>>> + ElfW (Addr) r_info = reloc->r_info; >>>> + const unsigned long int r_type = ELFW (R_TYPE) (r_info); >>>> + ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; >>>> + const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; >>>> + struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, >>>> version, r_type); >>>> + ElfW (Addr) value = 0; >>>> + if (sym_map != NULL) >>>> + value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; >>>> + >>>> + if (sym != NULL >>>> + && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == >>>> STT_GNU_IFUNC) >>>> + && __glibc_likely (sym->st_shndx != SHN_UNDEF) >>>> + && __glibc_likely (!skip_ifunc)) >>>> + value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); >>>> + >>>> + switch (r_type) >>>> + { >>>> +#ifndef RTLD_BOOTSTRAP >>>> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: >>>> + R_LARCH_TLS_DTPMOD32: >>>> + if (sym_map) >>>> + *addr_field = sym_map->l_tls_modid; >>>> + break; >>> >>> I know many ports do `if (sym_map)` but that seems (a) a workaround >>> for possibly >>> GNU ld bugs or (b) unneeded cargo cult. >>> >>> The check should better be removed. >>> >>> This applies to various TLS dynamic relocations below. >>> >>>> + >>>> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: >>>> + R_LARCH_TLS_DTPREL32: >>>> + if (sym != NULL) >>>> + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; >>>> + break; >>>> + >>>> + case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: >>>> + R_LARCH_TLS_TPREL32: >>>> + if (sym != NULL) >>>> + { >>>> + CHECK_STATIC_TLS (map, sym_map); >>>> + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; >>>> + } >>>> + break; >>>> + >>>> + case R_LARCH_COPY: >>>> + { >>>> + if (sym == NULL) >>>> + /* This can happen in trace mode if an object could not be >>>> + found. */ >>>> + break; >>>> + if (__glibc_unlikely (sym->st_size > refsym->st_size) >>>> + || (__glibc_unlikely (sym->st_size < refsym->st_size) >>>> + && GLRO(dl_verbose))) >>>> + { >>>> + const char *strtab; >>>> + >>>> + strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); >>>> + _dl_error_printf ("\ >>>> +%s: Symbol `%s' has different size in shared object, consider >>>> re-linking\n", >>>> + rtld_progname ?: "<program name unknown>", >>>> + strtab + refsym->st_name); >>>> + } >>>> + memcpy (reloc_addr, (void *) value, >>>> + MIN (sym->st_size, refsym->st_size)); >>>> + break; >>>> + } >>>> +#endif >>>> + >>>> +#if !defined RTLD_BOOTSTRAP >>>> + case R_LARCH_RELATIVE: >>>> + *addr_field = map->l_addr + reloc->r_addend; >>>> + break; >>>> +#endif >>> >>> I think this is copied from riscv but its relocation code is probably >>> not the best reference. sysdeps/m68k/dl-machine.h may be one of the >>> better implementations for the relocation switch table. >>> >>> In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are >>> needed in this function. There should be none of NONE, RELATIVE, >>> IRELATIVE, absolute relocation types, etc (RELATIVE is handled >>> elsewhere). >>> >>> GNU ld, in the presence of a bug, may produce spurious NONE >>> relocations. >>> Not handling NONE can catch some bugs. >>> >>>> + case R_LARCH_JUMP_SLOT: >>>> + case __WORDSIZE == 64 ? R_LARCH_64: >>>> + R_LARCH_32: >>>> + *addr_field = value; >>>> + break; >>>> + >>>> + case R_LARCH_IRELATIVE: >>>> + value = map->l_addr + reloc->r_addend; >>>> + if (__glibc_likely (!skip_ifunc)) >>>> + value = ((ElfW (Addr) (*) (void)) value) (); >>>> + *addr_field = value; >>>> + break; >>>> + >>>> + case R_LARCH_NONE: >>>> + break; >>>> + >>>> + default: >>>> + _dl_reloc_bad_type (map, r_type, 0); >>>> + break; >>>> + } >>>> +} >>>> + >>>> +static inline void __attribute__ ((always_inline)) >>>> +elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * >>>> reloc, >>>> + void *const reloc_addr) >>>> +{ >>>> + *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; >>>> +} >>>> + >>>> +static inline void __attribute__ ((always_inline)) >>>> +elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem >>>> *scope[], >>>> + ElfW (Addr) l_addr, >>>> + const ElfW (Rela) * reloc, int skip_ifunc) >>>> +{ >>>> + ElfW (Addr) *const reloc_addr = (void *) (l_addr + >>>> reloc->r_offset); >>>> + const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); >>>> + >>>> + /* Check for unexpected PLT reloc type. */ >>>> + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) >>>> + { >>>> + if (__glibc_unlikely (map->l_mach.plt == 0)) >>>> + { >>>> + if (l_addr) >>>> + *reloc_addr += l_addr; >>>> + } >>>> + else >>>> + *reloc_addr = map->l_mach.plt; >>>> + } >>>> + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) >>> >>> This is a design issue of ifunc for many ports. >>> Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in >>> .rela.plt, then you can remove this branch. >>> >>>> + { >>>> + ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); >>>> + if (__glibc_likely (!skip_ifunc)) >>>> + value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); >>>> + *reloc_addr = (ElfW (Addr)) value; >>>> + } >>>> + else >>>> + _dl_reloc_bad_type (map, r_type, 1); >>>> +} >>>> + >>>> +/* Set up the loaded object described by L so its stub function >>>> + will jump to the on-demand fixup code __dl_runtime_resolve. */ >>>> + >>>> +static inline int __attribute__ ((always_inline)) >>>> +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem >>>> *scope[], >>>> + int lazy, int profile) >>>> +{ >>>> +#ifndef RTLD_BOOTSTRAP >>>> + /* If using PLTs, fill in the first two entries of .got.plt. */ >>>> + if (l->l_info[DT_JMPREL]) >>>> + { >>>> + extern void _dl_runtime_resolve (void) >>>> + __attribute__ ((visibility ("hidden"))); >>>> + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, >>>> l_info[DT_PLTGOT]); >>>> + gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; >>>> + gotplt[1] = (ElfW (Addr)) l; >>>> + } >>>> +#endif >>>> + >>>> + return lazy; >>>> +} >>>> + >>>> +#endif /* RESOLVE_MAP */ >>>> diff --git a/sysdeps/loongarch/dl-trampoline.S >>>> b/sysdeps/loongarch/dl-trampoline.S >>>> new file mode 100644 >>>> index 0000000000..eb610392f6 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/dl-trampoline.S >>>> @@ -0,0 +1,91 @@ >>>> +/* PLT trampolines. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#include <sysdep.h> >>>> +#include <sys/asm.h> >>>> + >>>> +/* Assembler veneer called from the PLT header code for lazy loading. >>>> + The PLT header passes its own args in t0-t2. */ >>>> + >>>> +#ifdef __loongarch_soft_float >>>> +# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) >>>> +#else >>>> +# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) >>>> +#endif >>>> + >>>> +ENTRY (_dl_runtime_resolve) >>>> + >>>> + /* Save arguments to stack. */ >>>> + ADDI sp, sp, -FRAME_SIZE >>>> + >>>> + REG_S ra, sp, 9*SZREG >>>> + REG_S a0, sp, 1*SZREG >>>> + REG_S a1, sp, 2*SZREG >>>> + REG_S a2, sp, 3*SZREG >>>> + REG_S a3, sp, 4*SZREG >>>> + REG_S a4, sp, 5*SZREG >>>> + REG_S a5, sp, 6*SZREG >>>> + REG_S a6, sp, 7*SZREG >>>> + REG_S a7, sp, 8*SZREG >>>> + >>>> +#ifndef __loongarch_soft_float >>>> + FREG_S fa0, sp, 10*SZREG + 0*SZFREG >>>> + FREG_S fa1, sp, 10*SZREG + 1*SZFREG >>>> + FREG_S fa2, sp, 10*SZREG + 2*SZFREG >>>> + FREG_S fa3, sp, 10*SZREG + 3*SZFREG >>>> + FREG_S fa4, sp, 10*SZREG + 4*SZFREG >>>> + FREG_S fa5, sp, 10*SZREG + 5*SZFREG >>>> + FREG_S fa6, sp, 10*SZREG + 6*SZFREG >>>> + FREG_S fa7, sp, 10*SZREG + 7*SZFREG >>>> +#endif >>>> + >>>> + /* Update .got.plt and obtain runtime address of callee */ >>>> + SLLI a1, t1, 1 >>>> + or a0, t0, zero >>>> + ADD a1, a1, t1 >>>> + la a2, _dl_fixup >>>> + jirl ra, a2, 0 >>>> + or t1, v0, zero >>>> + >>>> + /* Restore arguments from stack. */ >>>> + REG_L ra, sp, 9*SZREG >>>> + REG_L a0, sp, 1*SZREG >>>> + REG_L a1, sp, 2*SZREG >>>> + REG_L a2, sp, 3*SZREG >>>> + REG_L a3, sp, 4*SZREG >>>> + REG_L a4, sp, 5*SZREG >>>> + REG_L a5, sp, 6*SZREG >>>> + REG_L a6, sp, 7*SZREG >>>> + REG_L a7, sp, 8*SZREG >>>> + >>>> +#ifndef __loongarch_soft_float >>>> + FREG_L fa0, sp, 10*SZREG + 0*SZFREG >>>> + FREG_L fa1, sp, 10*SZREG + 1*SZFREG >>>> + FREG_L fa2, sp, 10*SZREG + 2*SZFREG >>>> + FREG_L fa3, sp, 10*SZREG + 3*SZFREG >>>> + FREG_L fa4, sp, 10*SZREG + 4*SZFREG >>>> + FREG_L fa5, sp, 10*SZREG + 5*SZFREG >>>> + FREG_L fa6, sp, 10*SZREG + 6*SZFREG >>>> + FREG_L fa7, sp, 10*SZREG + 7*SZFREG >>>> +#endif >>>> + >>>> + ADDI sp, sp, FRAME_SIZE >>>> + >>>> + /* Invoke the callee. */ >>>> + jirl zero, t1, 0 >>>> +END (_dl_runtime_resolve) >>>> diff --git a/sysdeps/loongarch/jmpbuf-offsets.h >>>> b/sysdeps/loongarch/jmpbuf-offsets.h >>>> new file mode 100644 >>>> index 0000000000..a4b8ea690e >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/jmpbuf-offsets.h >>>> @@ -0,0 +1,22 @@ >>>> +/* Private macros for accessing __jmp_buf contents. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> License as >>>> + published by the Free Software Foundation; either version 2.1 >>>> of the >>>> + License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#include <jmpbuf-unwind.h> >>>> + >>>> +/* Helper for generic ____longjmp_chk(). */ >>>> +#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) >>>> diff --git a/sysdeps/loongarch/jmpbuf-unwind.h >>>> b/sysdeps/loongarch/jmpbuf-unwind.h >>>> new file mode 100644 >>>> index 0000000000..6fa509151d >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/jmpbuf-unwind.h >>>> @@ -0,0 +1,45 @@ >>>> +/* Examine __jmp_buf for unwinding frames. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#include <setjmp.h> >>>> +#include <stdint.h> >>>> +#include <unwind.h> >>>> +#include <sysdep.h> >>>> + >>>> +/* Test if longjmp to JMPBUF would unwind the frame >>>> + containing a local variable at ADDRESS. */ >>>> +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ >>>> + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) >>>> + >>>> +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ >>>> + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA >>>> (_context), _adj) >>>> + >>>> +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp >>>> (__jmp_buf regs) >>>> +{ >>>> + uintptr_t sp = regs[0].__sp; >>>> +#ifdef PTR_DEMANGLE >>>> + PTR_DEMANGLE (sp); >>>> +#endif >>>> + return sp; >>>> +} >>>> + >>>> +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ >>>> + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) >>>> + >>>> +/* We use the normal longjmp for unwinding. */ >>>> +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) >>>> diff --git a/sysdeps/loongarch/ldsodefs.h >>>> b/sysdeps/loongarch/ldsodefs.h >>>> new file mode 100644 >>>> index 0000000000..36b1b25b9f >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/ldsodefs.h >>>> @@ -0,0 +1,41 @@ >>>> +/* Run-time dynamic linker data structures for loaded ELF shared >>>> objects. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#ifndef _LOONGARCH_LDSODEFS_H >>>> +#define _LOONGARCH_LDSODEFS_H 1 >>>> + >>>> +#include <elf.h> >>>> + >>>> +struct La_loongarch_regs; >>>> +struct La_loongarch_retval; >>>> + >>>> +#define ARCH_PLTENTER_MEMBERS \ >>>> + ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned >>>> int, \ >>>> + uintptr_t *, uintptr_t *, \ >>>> + const struct La_loongarch_regs *, \ >>>> + unsigned int *, const char *name, \ >>>> + long int *framesizep); >>>> + >>>> +#define ARCH_PLTEXIT_MEMBERS \ >>>> + unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned >>>> int, \ >>>> + uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ >>>> + struct La_loongarch_retval *, const char *); >>>> + >>>> +#include_next <ldsodefs.h> >>>> + >>>> +#endif >>>> diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h >>>> new file mode 100644 >>>> index 0000000000..bbba73ed70 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/linkmap.h >>>> @@ -0,0 +1,22 @@ >>>> +/* Definition of link_map_machine. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +struct link_map_machine >>>> +{ >>>> + ElfW (Addr) plt; /* Address of .plt. */ >>>> +}; >>>> diff --git a/sysdeps/loongarch/machine-gmon.h >>>> b/sysdeps/loongarch/machine-gmon.h >>>> new file mode 100644 >>>> index 0000000000..4a3cdd964e >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/machine-gmon.h >>>> @@ -0,0 +1,37 @@ >>>> +/* LoongArch definitions for profiling support. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library; if not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +/* Accept 'frompc' address as argument from the function that calls >>>> + _mcount for profiling. Use __builtin_return_address (0) >>>> + for the 'selfpc' address. */ >>>> + >>>> +#include <sysdep.h> >>>> + >>>> +static void mcount_internal (unsigned long int frompc, >>>> + unsigned long int selfpc); >>>> + >>>> +#define _MCOUNT_DECL(frompc, selfpc) \ >>>> + static inline void mcount_internal (unsigned long int frompc, \ >>>> + unsigned long int selfpc) >>>> + >>>> +#define MCOUNT \ >>>> + void _mcount (void *frompc) \ >>>> + { \ >>>> + mcount_internal ((unsigned long int) frompc, \ >>>> + (unsigned long int) RETURN_ADDRESS (0)); \ >>>> + } >>>> diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S >>>> new file mode 100644 >>>> index 0000000000..b93ae2f5da >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/setjmp.S >>>> @@ -0,0 +1,66 @@ >>>> +/* setjmp for LoongArch. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#include <sysdep.h> >>>> +#include <sys/asm.h> >>>> + >>>> +ENTRY (_setjmp) >>>> + li.w a1,0 >>>> + b __sigsetjmp >>>> +END (_setjmp) >>>> + >>>> +ENTRY (setjmp) >>>> + li.w a1,1 >>>> +END (setjmp) >>>> + >>>> +ENTRY (__sigsetjmp) >>>> + REG_S ra, a0, 0*SZREG >>>> + REG_S sp, a0, 1*SZREG >>>> + REG_S x, a0, 2*SZREG >>>> + REG_S fp, a0, 3*SZREG >>>> + REG_S s0, a0, 4*SZREG >>>> + REG_S s1, a0, 5*SZREG >>>> + REG_S s2, a0, 6*SZREG >>>> + REG_S s3, a0, 7*SZREG >>>> + REG_S s4, a0, 8*SZREG >>>> + REG_S s5, a0, 9*SZREG >>>> + REG_S s6, a0, 10*SZREG >>>> + REG_S s7, a0, 11*SZREG >>>> + REG_S s8, a0, 12*SZREG >>>> + >>>> +#ifndef __loongarch_soft_float >>>> + FREG_S $f24, a0, 13*SZREG + 0*SZFREG >>>> + FREG_S $f25, a0, 13*SZREG + 1*SZFREG >>>> + FREG_S $f26, a0, 13*SZREG + 2*SZFREG >>>> + FREG_S $f27, a0, 13*SZREG + 3*SZFREG >>>> + FREG_S $f28, a0, 13*SZREG + 4*SZFREG >>>> + FREG_S $f29, a0, 13*SZREG + 5*SZFREG >>>> + FREG_S $f30, a0, 13*SZREG + 6*SZFREG >>>> + FREG_S $f31, a0, 13*SZREG + 7*SZFREG >>>> +#endif >>>> + >>>> +#if !IS_IN (libc) && IS_IN(rtld) >>>> + li.w v0, 0 >>>> + jirl zero,ra,0 >>>> +#else >>>> + b __sigjmp_save >>>> +#endif >>>> +END (__sigsetjmp) >>>> + >>>> +hidden_def (__sigsetjmp) >>>> +weak_alias (_setjmp, __GI__setjmp) >>>> diff --git a/sysdeps/loongarch/sotruss-lib.c >>>> b/sysdeps/loongarch/sotruss-lib.c >>>> new file mode 100644 >>>> index 0000000000..5b15f4815a >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/sotruss-lib.c >>>> @@ -0,0 +1,50 @@ >>>> +/* Override generic sotruss-lib.c to define actual functions for >>>> LoongArch. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#define HAVE_ARCH_PLTENTER >>>> +#define HAVE_ARCH_PLTEXIT >>>> + >>>> +#include <elf/sotruss-lib.c> >>>> + >>>> +ElfW (Addr) >>>> +la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), >>>> + unsigned int ndx __attribute__ ((unused)), >>>> + uintptr_t *refcook, uintptr_t *defcook, >>>> + La_loongarch_regs *regs, unsigned int *flags, >>>> + const char *symname, long int *framesizep) >>>> +{ >>>> + print_enter (refcook, defcook, symname, regs->lr_reg[0], >>>> regs->lr_reg[1], >>>> + regs->lr_reg[2], *flags); >>>> + >>>> + /* No need to copy anything, we will not need the parameters in >>>> any case. */ >>>> + *framesizep = 0; >>>> + >>>> + return sym->st_value; >>>> +} >>>> + >>>> +unsigned int >>>> +la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, >>>> + uintptr_t *refcook, uintptr_t *defcook, >>>> + const struct La_loongarch_regs *inregs, >>>> + struct La_loongarch_retval *outregs, >>>> + const char *symname) >>>> +{ >>>> + print_exit (refcook, defcook, symname, outregs->lrv_a0); >>>> + >>>> + return 0; >>>> +} >>>> diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S >>>> new file mode 100644 >>>> index 0000000000..a9b32aa966 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/start.S >>>> @@ -0,0 +1,67 @@ >>>> +/* Startup code compliant to the ELF LoongArch ABI. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#define __ASSEMBLY__ 1 >>>> +#include <entry.h> >>>> +#include <sys/asm.h> >>>> + >>>> +/* The entry point's job is to call __libc_start_main. Per the ABI, >>>> + a0 contains the address of a function to be passed to atexit. >>>> + __libc_start_main wants this in a5. */ >>>> + >>>> +/* >>>> +int >>>> +__libc_start_main (int (*main) (int, char **, char **), >>>> + int argc, >>>> + char **argv, >>>> + __typeof (main) init, >>>> + void (*fini) (void), >>>> + void (*rtld_fini) (void), >>>> + void *stack_end); >>>> + */ >>>> + >>>> +ENTRY (ENTRY_POINT) >>>> + >>>> +/* Terminate call stack by noting ra is undefined. Use a dummy >>>> + .cfi_label to force starting the FDE. */ >>>> + .cfi_label .Ldummy >>>> + cfi_undefined (1) >>>> + or a5, a0, zero /* rtld_fini */ >>>> + >>>> +/* We must get symbol main through GOT table, since main may not >>>> be local. >>>> + For instance: googletest defines main in dynamic library. */ >>>> + la.got a0, t0, main >>>> + REG_L a1, sp, 0 >>>> + ADDI a2, sp, SZREG >>>> + >>>> + /* Adjust $sp for 16-aligned */ >>>> + SRLI sp, sp, 4 >>>> + SLLI sp, sp, 4 >>>> + >>>> + move a3, zero /* used to be init */ >>>> + move a4, zero /* used to be fini */ >>>> + or a6, sp, zero /* stack_end */ >>>> + >>>> + la.got ra, t0, __libc_start_main >>>> + jirl ra, ra, 0 >>>> + >>>> + la.got ra, t0, abort >>>> + jirl ra, ra, 0 >>>> +END (ENTRY_POINT) >>>> + >>>> diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h >>>> new file mode 100644 >>>> index 0000000000..b41ee59694 >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/sys/asm.h >>>> @@ -0,0 +1,59 @@ >>>> +/* Miscellaneous macros. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#ifndef _SYS_ASM_H >>>> +#define _SYS_ASM_H >>>> + >>>> +#include <sys/regdef.h> >>>> +#include <sysdeps/generic/sysdep.h> >>>> + >>>> +/* Macros to handle different pointer/register sizes for 32/64-bit >>>> code. */ >>>> +#define SZREG 8 >>>> +#define SZFREG 8 >>>> +#define REG_L ld.d >>>> +#define REG_S st.d >>>> +#define SRLI srli.d >>>> +#define SLLI slli.d >>>> +#define ADDI addi.d >>>> +#define ADD add.d >>>> +#define BSTRINS bstrins.d >>>> +#define LI li.d >>>> +#define FREG_L fld.d >>>> +#define FREG_S fst.d >>>> + >>>> +/* Declare leaf routine. */ >>>> +#define LEAF(symbol) \ >>>> + .text; \ >>>> + .globl symbol; \ >>>> + .align 3; \ >>>> + cfi_startproc; \ >>>> + .type symbol, @function; \ >>>> + symbol: >>>> + >>>> +#define ENTRY(symbol) LEAF (symbol) >>>> + >>>> +/* Mark end of function. */ >>>> +#undef END >>>> +#define END(function) \ >>>> + cfi_endproc; \ >>>> + .size function, .- function; >>>> + >>>> +/* Stack alignment. */ >>>> +#define ALMASK ~15 >>>> + >>>> +#endif /* sys/asm.h */ >>>> diff --git a/sysdeps/loongarch/tst-audit.h >>>> b/sysdeps/loongarch/tst-audit.h >>>> new file mode 100644 >>>> index 0000000000..e71948c86e >>>> --- /dev/null >>>> +++ b/sysdeps/loongarch/tst-audit.h >>>> @@ -0,0 +1,23 @@ >>>> +/* Definitions for testing PLT entry/exit auditing. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <https://www.gnu.org/licenses/>. */ >>>> + >>>> +#define pltenter la_loongarch_gnu_pltenter >>>> +#define pltexit la_loongarch_gnu_pltexit >>>> +#define La_regs La_loongarch_regs >>>> +#define La_retval La_loongarch_retval >>>> +#define int_retval lrv_a0 >>>> diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>> b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>> new file mode 100644 >>>> index 0000000000..4887c30ca2 >>>> --- /dev/null >>>> +++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h >>>> @@ -0,0 +1,26 @@ >>>> +/* ldconfig default paths and libraries. >>>> + Copyright (C) 2022 Free Software Foundation, Inc. >>>> + This file is part of the GNU C Library. >>>> + >>>> + The GNU C Library is free software; you can redistribute it and/or >>>> + modify it under the terms of the GNU Lesser General Public >>>> + License as published by the Free Software Foundation; either >>>> + version 2.1 of the License, or (at your option) any later version. >>>> + >>>> + The GNU C Library is distributed in the hope that it will be >>>> useful, >>>> + but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>>> + Lesser General Public License for more details. >>>> + >>>> + You should have received a copy of the GNU Lesser General Public >>>> + License along with the GNU C Library. If not, see >>>> + <http://www.gnu.org/licenses/>. */ >>>> + >>>> +#include <sysdeps/generic/ldconfig.h> >>>> + >>>> +#define SYSDEP_KNOWN_INTERPRETER_NAMES \ >>>> + { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, >>>> + >>>> +#define SYSDEP_KNOWN_LIBRARY_NAMES \ >>>> + { "libc.so.6", FLAG_ELF_LIBC6 }, \ >>>> + { "libm.so.6", FLAG_ELF_LIBC6 }, >>>> -- >>>> 2.31.1 >>>>
On Thu, Jul 7, 2022 at 11:49 PM caiyinyu <caiyinyu@loongson.cn> wrote: > > + /* Check for unexpected PLT reloc type. */ > + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) > + { > + if (__glibc_unlikely (map->l_mach.plt == 0)) > + { > + if (l_addr) > + *reloc_addr += l_addr; > + } > + else > + *reloc_addr = map->l_mach.plt; > + } > + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > > This is a design issue of ifunc for many ports. > Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in > .rela.plt, then you can remove this branch. > > > *Definitely, for riscv, x86 and aarch64..., there are **R_*_IRELATIVEs in their **.rela.plt.* > > *But I don't understand why "Ideally R_*_IRELATIVE relocations are only in .rela.dyn"?* > > *Could you explain it?* > > *or we just keep it now? > * > > *Thanks.* > > > See https://maskray.me/blog/2021-01-18-gnu-indirect-function > ".rela.dyn vs .rela.plt" > > Conceptually .rela.plt should only have potentially lazy resolved > relocations. IRELATIVE are always eager, so .rela.plt isn't applicable. > In the early days things were a bit messy in the implementation, so > some early ports adopting ifunc may use .rela.plt . > GNU ld's PowerPC port apperas to do the right thing. > All lld supported ports do the right thing. > > > Fixed. Now R_*_IRELATIVE relocations are only in .rela.dyn. > > new binutils: > > https://github.com/loongson/binutils-gdb/tree/dev/new_reloc > > Thanks a lot. Great, thanks! So the glibc port can be simplified a bit :) > > > > 在 2022/6/11 上午4:26, Fangrui Song 写道: > > > On 2022-06-10, caiyinyu wrote: > > + > +#define elf_machine_type_class(type) \ > + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ > + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ > + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ > + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ > + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ > + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ > + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ > > Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list > seems an unneeded hack for many ports. Can you check does loongarch > really need them? > > *Removed*. > > > Thanks. > > *>>>>>>>>>>>>>>>* > > diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h > index 3beaaee117..500fe71a7e 100644 > --- a/sysdeps/loongarch/dl-machine.h > +++ b/sysdeps/loongarch/dl-machine.h > @@ -47,13 +47,7 @@ > #define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE > > #define elf_machine_type_class(type) \ > - ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT \ > - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ > - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ > - || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ > - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ > - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ > - || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ > + ((ELF_RTYPE_CLASS_PLT *((type) == ELF_MACHINE_JMP_SLOT)) \ > | (ELF_RTYPE_CLASS_COPY *((type) == R_LARCH_COPY))) > > #define ELF_MACHINE_NO_REL 1 > > *<<<<<<<<<<<<<<<<<<* > > * > * > > +#define RTLD_START \ > + asm(".text\n\ > + " _RTLD_PROLOGUE (ENTRY_POINT) "\ > + .cfi_label .Ldummy \n\ > + " CFI_UNDEFINED (1) " \n\ > + or $a0, $sp, $zero \n\ > + bl _dl_start \n\ > + # Stash user entry point in s0. \n\ > + or $s0, $v0, $zero \n\ > + # Load the original argument count. \n\ > + ld.d $a1, $sp, 0 \n\ > + # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ > + char **env) \n\ > + la $a0, _rtld_local \n\ > + ld.d $a0, $a0, 0 \n\ > + addi.d $a2, $sp, 8 \n\ > + slli.d $a3, $a1, 3 \n\ > + add.d $a3, $a3, $a2 \n\ > + addi.d $a3, $a3, 8 \n\ > > The _dl_init seems much more complex than the riscv counterpart. > > *There is no need to simplify further.* > > > Thanks. > > > > loongarch: > > 96 # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ > 97 char **env) \n\ > * 98 la $a0, _rtld_local \n\ > 99 ld.d $a0, $a0, 0 \n\ * > *100 addi.d $a2, $sp, 8 \n\ ** > **101 slli.d $a3, $a1, 3 \n\ ** > **102 add.d $a3, $a3, $a2 \n\ ** > **103 addi.d $a3, $a3, 8 \n\* > 104 # Stash the stack pointer in s1.\n\ > > riscv: > > 112 # Call _dl_init (struct link_map *main_map, int argc, char **argv, char **env) \n\ > *113 " STRINGXP (REG_L) " a0, _rtld_local\n\* > *114 add a2, sp, " STRINGXP (SZREG) "\n\** > **115 sll a3, a1, " STRINGXP (PTRLOG) "\n\** > **116 add a3, a3, a2\n\** > **117 add a3, a3, " STRINGXP (SZREG) "\n\* > 118 # Stash the stack pointer in s1.\n\ > > <<<<<<<<<<<<<< > > > + # Adjust $sp for 16-aligned \n\ > + srli.d $t0, $sp, 4 \n\ > + slli.d $t0, $t0, 4 \n\ > + ori $t1, $sp, 0 \n\ > + addi.d $sp, $t0, -32 \n\ > + st.d $t1, $sp, 24 \n\ > > > Seems too complex. > > *Fixed.* > > > Thanks. > > *>>>>>>>>>>>>>>>>>>>* > > *diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h > index 500fe71a7e..6ec9a403d3 100644 > --- a/sysdeps/loongarch/dl-machine.h > +++ b/sysdeps/loongarch/dl-machine.h > @@ -101,16 +101,15 @@ static inline ElfW (Addr) elf_machine_dynamic (void) > slli.d $a3, $a1, 3 \n\ > add.d $a3, $a3, $a2 \n\ > addi.d $a3, $a3, 8 \n\ > + # Stash the stack pointer in s1.\n\ > + or $s1, $sp, $zero \n\ > # Adjust $sp for 16-aligned \n\ > - srli.d $t0, $sp, 4 \n\ > - slli.d $t0, $t0, 4 \n\ > - ori $t1, $sp, 0 \n\ > - addi.d $sp, $t0, -32 \n\ > - st.d $t1, $sp, 24 \n\ > + bstrins.d $sp, $zero, 3, 0 \n\ > # Call the function to run the initializers. \n\ > bl _dl_init \n\ > + # Restore the stack pointer for _start.\n\ > + or $sp, $s1, $zero \n\ > # Pass our finalizer function to _start. \n\ > - ld.d $sp, $sp, 24 \n\ > la $a0, _dl_fini \n\ > # Jump to the user entry point. \n\ > jirl $zero, $s0, 0 \n\ > * > > *<<<<<<<<<<<<<<<<<<* > > > +static inline void __attribute__ ((always_inline)) > +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], > + const ElfW (Rela) * reloc, > + const ElfW (Sym) * sym, > > Seems excess space after `*` > > *Fixed all same problems.* > > > Thanks. > > + /* Check for unexpected PLT reloc type. */ > + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) > + { > + if (__glibc_unlikely (map->l_mach.plt == 0)) > + { > + if (l_addr) > + *reloc_addr += l_addr; > + } > + else > + *reloc_addr = map->l_mach.plt; > + } > + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > > This is a design issue of ifunc for many ports. > Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in > .rela.plt, then you can remove this branch. > > > *Definitely, for riscv, x86 and aarch64..., there are **R_*_IRELATIVEs in their **.rela.plt.* > > *But I don't understand why "Ideally R_*_IRELATIVE relocations are only in .rela.dyn"?* > > *Could you explain it?* > > *or we just keep it now? > * > > *Thanks.* > > > See https://maskray.me/blog/2021-01-18-gnu-indirect-function > ".rela.dyn vs .rela.plt" > > Conceptually .rela.plt should only have potentially lazy resolved > relocations. IRELATIVE are always eager, so .rela.plt isn't applicable. > In the early days things were a bit messy in the implementation, so > some early ports adopting ifunc may use .rela.plt . > GNU ld's PowerPC port apperas to do the right thing. > All lld supported ports do the right thing. > > * > * > > 在 2022/6/6 上午7:55, Fangrui Song 写道: > > On 2022-06-01, caiyinyu wrote: > > --- > sysdeps/loongarch/__longjmp.S | 52 ++++ > sysdeps/loongarch/bits/endianness.h | 11 + > sysdeps/loongarch/bits/link.h | 58 ++++ > sysdeps/loongarch/bits/setjmp.h | 42 +++ > sysdeps/loongarch/bsd-_setjmp.c | 1 + > sysdeps/loongarch/bsd-setjmp.c | 1 + > sysdeps/loongarch/dl-machine.h | 307 +++++++++++++++++++ > sysdeps/loongarch/dl-trampoline.S | 91 ++++++ > sysdeps/loongarch/jmpbuf-offsets.h | 22 ++ > sysdeps/loongarch/jmpbuf-unwind.h | 45 +++ > sysdeps/loongarch/ldsodefs.h | 41 +++ > sysdeps/loongarch/linkmap.h | 22 ++ > sysdeps/loongarch/machine-gmon.h | 37 +++ > sysdeps/loongarch/setjmp.S | 66 ++++ > sysdeps/loongarch/sotruss-lib.c | 50 +++ > sysdeps/loongarch/start.S | 67 ++++ > sysdeps/loongarch/sys/asm.h | 59 ++++ > sysdeps/loongarch/tst-audit.h | 23 ++ > sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++ > 19 files changed, 1021 insertions(+) > create mode 100644 sysdeps/loongarch/__longjmp.S > create mode 100644 sysdeps/loongarch/bits/endianness.h > create mode 100644 sysdeps/loongarch/bits/link.h > create mode 100644 sysdeps/loongarch/bits/setjmp.h > create mode 100644 sysdeps/loongarch/bsd-_setjmp.c > create mode 100644 sysdeps/loongarch/bsd-setjmp.c > create mode 100644 sysdeps/loongarch/dl-machine.h > create mode 100644 sysdeps/loongarch/dl-trampoline.S > create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h > create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h > create mode 100644 sysdeps/loongarch/ldsodefs.h > create mode 100644 sysdeps/loongarch/linkmap.h > create mode 100644 sysdeps/loongarch/machine-gmon.h > create mode 100644 sysdeps/loongarch/setjmp.S > create mode 100644 sysdeps/loongarch/sotruss-lib.c > create mode 100644 sysdeps/loongarch/start.S > create mode 100644 sysdeps/loongarch/sys/asm.h > create mode 100644 sysdeps/loongarch/tst-audit.h > create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h > > diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S > new file mode 100644 > index 0000000000..b7690dd94f > --- /dev/null > +++ b/sysdeps/loongarch/__longjmp.S > @@ -0,0 +1,52 @@ > +/* longjmp. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include <sysdep.h> > +#include <sys/asm.h> > + > +ENTRY (__longjmp) > + REG_L ra, a0, 0*SZREG > + REG_L sp, a0, 1*SZREG > + REG_L x, a0, 2*SZREG > + REG_L fp, a0, 3*SZREG > + REG_L s0, a0, 4*SZREG > + REG_L s1, a0, 5*SZREG > + REG_L s2, a0, 6*SZREG > + REG_L s3, a0, 7*SZREG > + REG_L s4, a0, 8*SZREG > + REG_L s5, a0, 9*SZREG > + REG_L s6, a0, 10*SZREG > + REG_L s7, a0, 11*SZREG > + REG_L s8, a0, 12*SZREG > + > +#ifndef __loongarch_soft_float > + FREG_L $f24, a0, 13*SZREG + 0*SZFREG > + FREG_L $f25, a0, 13*SZREG + 1*SZFREG > + FREG_L $f26, a0, 13*SZREG + 2*SZFREG > + FREG_L $f27, a0, 13*SZREG + 3*SZFREG > + FREG_L $f28, a0, 13*SZREG + 4*SZFREG > + FREG_L $f29, a0, 13*SZREG + 5*SZFREG > + FREG_L $f30, a0, 13*SZREG + 6*SZFREG > + FREG_L $f31, a0, 13*SZREG + 7*SZFREG > +#endif > + > + sltui a0,a1,1 > + ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 > + jirl zero,ra,0 > + > +END (__longjmp) > diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h > new file mode 100644 > index 0000000000..7290be7b18 > --- /dev/null > +++ b/sysdeps/loongarch/bits/endianness.h > @@ -0,0 +1,11 @@ > +#ifndef _BITS_ENDIANNESS_H > +#define _BITS_ENDIANNESS_H 1 > + > +#ifndef _BITS_ENDIAN_H > +#error "Never use <bits/endianness.h> directly; include <endian.h> instead." > +#endif > + > +/* LoongArch is little-endian. */ > +#define __BYTE_ORDER __LITTLE_ENDIAN > + > +#endif /* bits/endianness.h */ > diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h > new file mode 100644 > index 0000000000..4df09989cb > --- /dev/null > +++ b/sysdeps/loongarch/bits/link.h > @@ -0,0 +1,58 @@ > +/* Machine-specific declarations for dynamic linker interface. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef _LINK_H > +#error "Never include <bits/link.h> directly; use <link.h> instead." > +#endif > + > +typedef struct La_loongarch_regs > +{ > + unsigned long int lr_reg[8]; /* a0 - a7 */ > + double lr_fpreg[8]; /* fa0 - fa7 */ > + unsigned long int lr_ra; > + unsigned long int lr_sp; > +} La_loongarch_regs; > + > +/* Return values for calls from PLT on LoongArch. */ > +typedef struct La_loongarch_retval > +{ > + unsigned long int lrv_a0; > + unsigned long int lrv_a1; > + double lrv_fa0; > + double lrv_fa1; > +} La_loongarch_retval; > + > +__BEGIN_DECLS > + > +extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, > + unsigned int __ndx, > + uintptr_t *__refcook, > + uintptr_t *__defcook, > + La_loongarch_regs *__regs, > + unsigned int *__flags, > + const char *__symname, > + long int *__framesizep); > +extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, > + unsigned int __ndx, > + uintptr_t *__refcook, > + uintptr_t *__defcook, > + const La_loongarch_regs *__inregs, > + La_loongarch_retval *__outregs, > + const char *__symname); > + > +__END_DECLS > diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h > new file mode 100644 > index 0000000000..8b323ad2b6 > --- /dev/null > +++ b/sysdeps/loongarch/bits/setjmp.h > @@ -0,0 +1,42 @@ > +/* Define the machine-dependent type `jmp_buf'. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef _LOONGARCH_BITS_SETJMP_H > +#define _LOONGARCH_BITS_SETJMP_H > + > +typedef struct __jmp_buf_internal_tag > +{ > + /* Program counter. */ > + long int __pc; > + /* Stack pointer. */ > + long int __sp; > + /* Reserved */ > + long int __x; > + /* Frame pointer. */ > + long int __fp; > + /* Callee-saved registers. */ > + long int __regs[9]; > + > +#ifndef __loongarch_soft_float > + /* Callee-saved floating point registers. */ > + double __fpregs[8]; > +#endif > + > +} __jmp_buf[1]; > + > +#endif /* _LOONGARCH_BITS_SETJMP_H */ > diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c > new file mode 100644 > index 0000000000..32f49441c3 > --- /dev/null > +++ b/sysdeps/loongarch/bsd-_setjmp.c > @@ -0,0 +1 @@ > +/* _setjmp is implemented in setjmp.S. */ > diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c > new file mode 100644 > index 0000000000..45fd802aac > --- /dev/null > +++ b/sysdeps/loongarch/bsd-setjmp.c > @@ -0,0 +1 @@ > +/* setjmp is implemented in setjmp.S. */ > diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h > new file mode 100644 > index 0000000000..4e19ad9319 > --- /dev/null > +++ b/sysdeps/loongarch/dl-machine.h > @@ -0,0 +1,307 @@ > +/* Machine-dependent ELF dynamic relocation inline functions. > + Copyright (C) 2022 Free Software Foundation, Inc. > + > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef dl_machine_h > +#define dl_machine_h > + > +#define ELF_MACHINE_NAME "LoongArch" > + > +#include <entry.h> > +#include <elf/elf.h> > +#include <sys/asm.h> > +#include <dl-tls.h> > +#include <dl-static-tls.h> > +#include <dl-machine-rel.h> > + > +#ifndef _RTLD_PROLOGUE > +# define _RTLD_PROLOGUE(entry) \ > + ".globl\t" __STRING (entry) "\n\t" \ > + ".type\t" __STRING (entry) ", @function\n\t" \ > + CFI_STARTPROC "\n" \ > + __STRING (entry) ":\n" > +#endif > + > +#ifndef _RTLD_EPILOGUE > +# define _RTLD_EPILOGUE(entry) \ > + CFI_ENDPROC "\n\t" \ > + ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" > +#endif > + > +#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT > +#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE > + > +#define elf_machine_type_class(type) \ > + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ > + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ > + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ > + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ > + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ > + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ > + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ > > > Placing TLS dynamic relocations in the ELF_RTYPE_CLASS_PLT list > seems an unneeded hack for many ports. Can you check does loongarch > really need them? > > + | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) > + > +#define ELF_MACHINE_NO_REL 1 > +#define ELF_MACHINE_NO_RELA 0 > + > +/* Return nonzero iff ELF header is compatible with the running host. */ > +static inline int > +elf_machine_matches_host (const ElfW (Ehdr) * ehdr) > +{ > + /* We can only run LoongArch binaries. */ > + if (ehdr->e_machine != EM_LOONGARCH) > + return 0; > + > + return 1; > +} > + > +/* Return the run-time load address of the shared object. */ > +static inline ElfW (Addr) elf_machine_load_address (void) > +{ > + extern const ElfW(Ehdr) __ehdr_start attribute_hidden; > + return (ElfW(Addr)) &__ehdr_start; > +} > + > +/* Return the link-time address of _DYNAMIC. */ > +static inline ElfW (Addr) elf_machine_dynamic (void) > +{ > + extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; > + return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); > +} > + > +/* Initial entry point code for the dynamic linker. > + The C function `_dl_start' is the real entry point; > + its return value is the user program's entry point. */ > + > +#define RTLD_START \ > + asm(".text\n\ > + " _RTLD_PROLOGUE (ENTRY_POINT) "\ > + .cfi_label .Ldummy \n\ > + " CFI_UNDEFINED (1) " \n\ > + or $a0, $sp, $zero \n\ > + bl _dl_start \n\ > + # Stash user entry point in s0. \n\ > + or $s0, $v0, $zero \n\ > + # Load the original argument count. \n\ > + ld.d $a1, $sp, 0 \n\ > + # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ > + char **env) \n\ > + la $a0, _rtld_local \n\ > + ld.d $a0, $a0, 0 \n\ > + addi.d $a2, $sp, 8 \n\ > + slli.d $a3, $a1, 3 \n\ > + add.d $a3, $a3, $a2 \n\ > + addi.d $a3, $a3, 8 \n\ > > > The _dl_init seems much more complex than the riscv counterpart. > > + # Adjust $sp for 16-aligned \n\ > + srli.d $t0, $sp, 4 \n\ > + slli.d $t0, $t0, 4 \n\ > + ori $t1, $sp, 0 \n\ > + addi.d $sp, $t0, -32 \n\ > + st.d $t1, $sp, 24 \n\ > > > Seems too complex. > > + # Call the function to run the initializers. \n\ > + bl _dl_init \n\ > + # Pass our finalizer function to _start. \n\ > + ld.d $sp, $sp, 24 \n\ > + la $a0, _dl_fini \n\ > + # Jump to the user entry point. \n\ > + jirl $zero, $s0, 0 \n\ > + " _RTLD_EPILOGUE (ENTRY_POINT) "\ > + .previous"); > + > +/* Names of the architecture-specific auditing callback functions. */ > +#define ARCH_LA_PLTENTER loongarch_gnu_pltenter > +#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit > + > +/* Bias .got.plt entry by the offset requested by the PLT header. */ > +#define elf_machine_plt_value(map, reloc, value) (value) > + > +static inline ElfW (Addr) > +elf_machine_fixup_plt (struct link_map *map, lookup_t t, > + const ElfW (Sym) * refsym, const ElfW (Sym) * sym, > + const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, > + ElfW (Addr) value) > +{ > + return *reloc_addr = value; > +} > + > +#endif /* !dl_machine_h */ > + > +#ifdef RESOLVE_MAP > + > +/* Perform a relocation described by R_INFO at the location pointed to > + by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and > + MAP is the object containing the reloc. */ > + > +static inline void __attribute__ ((always_inline)) > +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], > + const ElfW (Rela) * reloc, > + const ElfW (Sym) * sym, > > > Seems excess space after `*` > > + const struct r_found_version *version, > + void *const reloc_addr, int skip_ifunc) > +{ > + ElfW (Addr) r_info = reloc->r_info; > + const unsigned long int r_type = ELFW (R_TYPE) (r_info); > + ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; > + const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; > + struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type); > + ElfW (Addr) value = 0; > + if (sym_map != NULL) > + value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; > + > + if (sym != NULL > + && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC) > + && __glibc_likely (sym->st_shndx != SHN_UNDEF) > + && __glibc_likely (!skip_ifunc)) > + value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); > + > + switch (r_type) > + { > +#ifndef RTLD_BOOTSTRAP > + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: > + R_LARCH_TLS_DTPMOD32: > + if (sym_map) > + *addr_field = sym_map->l_tls_modid; > + break; > > > I know many ports do `if (sym_map)` but that seems (a) a workaround for possibly > GNU ld bugs or (b) unneeded cargo cult. > > The check should better be removed. > > This applies to various TLS dynamic relocations below. > > + > + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: > + R_LARCH_TLS_DTPREL32: > + if (sym != NULL) > + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; > + break; > + > + case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: > + R_LARCH_TLS_TPREL32: > + if (sym != NULL) > + { > + CHECK_STATIC_TLS (map, sym_map); > + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; > + } > + break; > + > + case R_LARCH_COPY: > + { > + if (sym == NULL) > + /* This can happen in trace mode if an object could not be > + found. */ > + break; > + if (__glibc_unlikely (sym->st_size > refsym->st_size) > + || (__glibc_unlikely (sym->st_size < refsym->st_size) > + && GLRO(dl_verbose))) > + { > + const char *strtab; > + > + strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); > + _dl_error_printf ("\ > +%s: Symbol `%s' has different size in shared object, consider re-linking\n", > + rtld_progname ?: "<program name unknown>", > + strtab + refsym->st_name); > + } > + memcpy (reloc_addr, (void *) value, > + MIN (sym->st_size, refsym->st_size)); > + break; > + } > +#endif > + > +#if !defined RTLD_BOOTSTRAP > + case R_LARCH_RELATIVE: > + *addr_field = map->l_addr + reloc->r_addend; > + break; > +#endif > > > I think this is copied from riscv but its relocation code is probably > not the best reference. sysdeps/m68k/dl-machine.h may be one of the > better implementations for the relocation switch table. > > In RTLD_BOOTSTRAP mode, only two relocations (GLOB_DAT/JMP_SLOT) are > needed in this function. There should be none of NONE, RELATIVE, > IRELATIVE, absolute relocation types, etc (RELATIVE is handled > elsewhere). > > GNU ld, in the presence of a bug, may produce spurious NONE relocations. > Not handling NONE can catch some bugs. > > + case R_LARCH_JUMP_SLOT: > + case __WORDSIZE == 64 ? R_LARCH_64: > + R_LARCH_32: > + *addr_field = value; > + break; > + > + case R_LARCH_IRELATIVE: > + value = map->l_addr + reloc->r_addend; > + if (__glibc_likely (!skip_ifunc)) > + value = ((ElfW (Addr) (*) (void)) value) (); > + *addr_field = value; > + break; > + > + case R_LARCH_NONE: > + break; > + > + default: > + _dl_reloc_bad_type (map, r_type, 0); > + break; > + } > +} > + > +static inline void __attribute__ ((always_inline)) > +elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc, > + void *const reloc_addr) > +{ > + *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; > +} > + > +static inline void __attribute__ ((always_inline)) > +elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], > + ElfW (Addr) l_addr, > + const ElfW (Rela) * reloc, int skip_ifunc) > +{ > + ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset); > + const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); > + > + /* Check for unexpected PLT reloc type. */ > + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) > + { > + if (__glibc_unlikely (map->l_mach.plt == 0)) > + { > + if (l_addr) > + *reloc_addr += l_addr; > + } > + else > + *reloc_addr = map->l_mach.plt; > + } > + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) > > > This is a design issue of ifunc for many ports. > Ideally R_*_IRELATIVE relocations are only in .rela.dyn, not in > .rela.plt, then you can remove this branch. > > + { > + ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); > + if (__glibc_likely (!skip_ifunc)) > + value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); > + *reloc_addr = (ElfW (Addr)) value; > + } > + else > + _dl_reloc_bad_type (map, r_type, 1); > +} > + > +/* Set up the loaded object described by L so its stub function > + will jump to the on-demand fixup code __dl_runtime_resolve. */ > + > +static inline int __attribute__ ((always_inline)) > +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], > + int lazy, int profile) > +{ > +#ifndef RTLD_BOOTSTRAP > + /* If using PLTs, fill in the first two entries of .got.plt. */ > + if (l->l_info[DT_JMPREL]) > + { > + extern void _dl_runtime_resolve (void) > + __attribute__ ((visibility ("hidden"))); > + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]); > + gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; > + gotplt[1] = (ElfW (Addr)) l; > + } > +#endif > + > + return lazy; > +} > + > +#endif /* RESOLVE_MAP */ > diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S > new file mode 100644 > index 0000000000..eb610392f6 > --- /dev/null > +++ b/sysdeps/loongarch/dl-trampoline.S > @@ -0,0 +1,91 @@ > +/* PLT trampolines. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include <sysdep.h> > +#include <sys/asm.h> > + > +/* Assembler veneer called from the PLT header code for lazy loading. > + The PLT header passes its own args in t0-t2. */ > + > +#ifdef __loongarch_soft_float > +# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) > +#else > +# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) > +#endif > + > +ENTRY (_dl_runtime_resolve) > + > + /* Save arguments to stack. */ > + ADDI sp, sp, -FRAME_SIZE > + > + REG_S ra, sp, 9*SZREG > + REG_S a0, sp, 1*SZREG > + REG_S a1, sp, 2*SZREG > + REG_S a2, sp, 3*SZREG > + REG_S a3, sp, 4*SZREG > + REG_S a4, sp, 5*SZREG > + REG_S a5, sp, 6*SZREG > + REG_S a6, sp, 7*SZREG > + REG_S a7, sp, 8*SZREG > + > +#ifndef __loongarch_soft_float > + FREG_S fa0, sp, 10*SZREG + 0*SZFREG > + FREG_S fa1, sp, 10*SZREG + 1*SZFREG > + FREG_S fa2, sp, 10*SZREG + 2*SZFREG > + FREG_S fa3, sp, 10*SZREG + 3*SZFREG > + FREG_S fa4, sp, 10*SZREG + 4*SZFREG > + FREG_S fa5, sp, 10*SZREG + 5*SZFREG > + FREG_S fa6, sp, 10*SZREG + 6*SZFREG > + FREG_S fa7, sp, 10*SZREG + 7*SZFREG > +#endif > + > + /* Update .got.plt and obtain runtime address of callee */ > + SLLI a1, t1, 1 > + or a0, t0, zero > + ADD a1, a1, t1 > + la a2, _dl_fixup > + jirl ra, a2, 0 > + or t1, v0, zero > + > + /* Restore arguments from stack. */ > + REG_L ra, sp, 9*SZREG > + REG_L a0, sp, 1*SZREG > + REG_L a1, sp, 2*SZREG > + REG_L a2, sp, 3*SZREG > + REG_L a3, sp, 4*SZREG > + REG_L a4, sp, 5*SZREG > + REG_L a5, sp, 6*SZREG > + REG_L a6, sp, 7*SZREG > + REG_L a7, sp, 8*SZREG > + > +#ifndef __loongarch_soft_float > + FREG_L fa0, sp, 10*SZREG + 0*SZFREG > + FREG_L fa1, sp, 10*SZREG + 1*SZFREG > + FREG_L fa2, sp, 10*SZREG + 2*SZFREG > + FREG_L fa3, sp, 10*SZREG + 3*SZFREG > + FREG_L fa4, sp, 10*SZREG + 4*SZFREG > + FREG_L fa5, sp, 10*SZREG + 5*SZFREG > + FREG_L fa6, sp, 10*SZREG + 6*SZFREG > + FREG_L fa7, sp, 10*SZREG + 7*SZFREG > +#endif > + > + ADDI sp, sp, FRAME_SIZE > + > + /* Invoke the callee. */ > + jirl zero, t1, 0 > +END (_dl_runtime_resolve) > diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h > new file mode 100644 > index 0000000000..a4b8ea690e > --- /dev/null > +++ b/sysdeps/loongarch/jmpbuf-offsets.h > @@ -0,0 +1,22 @@ > +/* Private macros for accessing __jmp_buf contents. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public License as > + published by the Free Software Foundation; either version 2.1 of the > + License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include <jmpbuf-unwind.h> > + > +/* Helper for generic ____longjmp_chk(). */ > +#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) > diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h > new file mode 100644 > index 0000000000..6fa509151d > --- /dev/null > +++ b/sysdeps/loongarch/jmpbuf-unwind.h > @@ -0,0 +1,45 @@ > +/* Examine __jmp_buf for unwinding frames. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include <setjmp.h> > +#include <stdint.h> > +#include <unwind.h> > +#include <sysdep.h> > + > +/* Test if longjmp to JMPBUF would unwind the frame > + containing a local variable at ADDRESS. */ > +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ > + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) > + > +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ > + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj) > + > +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs) > +{ > + uintptr_t sp = regs[0].__sp; > +#ifdef PTR_DEMANGLE > + PTR_DEMANGLE (sp); > +#endif > + return sp; > +} > + > +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ > + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) > + > +/* We use the normal longjmp for unwinding. */ > +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) > diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h > new file mode 100644 > index 0000000000..36b1b25b9f > --- /dev/null > +++ b/sysdeps/loongarch/ldsodefs.h > @@ -0,0 +1,41 @@ > +/* Run-time dynamic linker data structures for loaded ELF shared objects. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef _LOONGARCH_LDSODEFS_H > +#define _LOONGARCH_LDSODEFS_H 1 > + > +#include <elf.h> > + > +struct La_loongarch_regs; > +struct La_loongarch_retval; > + > +#define ARCH_PLTENTER_MEMBERS \ > + ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \ > + uintptr_t *, uintptr_t *, \ > + const struct La_loongarch_regs *, \ > + unsigned int *, const char *name, \ > + long int *framesizep); > + > +#define ARCH_PLTEXIT_MEMBERS \ > + unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \ > + uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ > + struct La_loongarch_retval *, const char *); > + > +#include_next <ldsodefs.h> > + > +#endif > diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h > new file mode 100644 > index 0000000000..bbba73ed70 > --- /dev/null > +++ b/sysdeps/loongarch/linkmap.h > @@ -0,0 +1,22 @@ > +/* Definition of link_map_machine. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +struct link_map_machine > +{ > + ElfW (Addr) plt; /* Address of .plt. */ > +}; > diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h > new file mode 100644 > index 0000000000..4a3cdd964e > --- /dev/null > +++ b/sysdeps/loongarch/machine-gmon.h > @@ -0,0 +1,37 @@ > +/* LoongArch definitions for profiling support. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + <https://www.gnu.org/licenses/>. */ > + > +/* Accept 'frompc' address as argument from the function that calls > + _mcount for profiling. Use __builtin_return_address (0) > + for the 'selfpc' address. */ > + > +#include <sysdep.h> > + > +static void mcount_internal (unsigned long int frompc, > + unsigned long int selfpc); > + > +#define _MCOUNT_DECL(frompc, selfpc) \ > + static inline void mcount_internal (unsigned long int frompc, \ > + unsigned long int selfpc) > + > +#define MCOUNT \ > + void _mcount (void *frompc) \ > + { \ > + mcount_internal ((unsigned long int) frompc, \ > + (unsigned long int) RETURN_ADDRESS (0)); \ > + } > diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S > new file mode 100644 > index 0000000000..b93ae2f5da > --- /dev/null > +++ b/sysdeps/loongarch/setjmp.S > @@ -0,0 +1,66 @@ > +/* setjmp for LoongArch. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include <sysdep.h> > +#include <sys/asm.h> > + > +ENTRY (_setjmp) > + li.w a1,0 > + b __sigsetjmp > +END (_setjmp) > + > +ENTRY (setjmp) > + li.w a1,1 > +END (setjmp) > + > +ENTRY (__sigsetjmp) > + REG_S ra, a0, 0*SZREG > + REG_S sp, a0, 1*SZREG > + REG_S x, a0, 2*SZREG > + REG_S fp, a0, 3*SZREG > + REG_S s0, a0, 4*SZREG > + REG_S s1, a0, 5*SZREG > + REG_S s2, a0, 6*SZREG > + REG_S s3, a0, 7*SZREG > + REG_S s4, a0, 8*SZREG > + REG_S s5, a0, 9*SZREG > + REG_S s6, a0, 10*SZREG > + REG_S s7, a0, 11*SZREG > + REG_S s8, a0, 12*SZREG > + > +#ifndef __loongarch_soft_float > + FREG_S $f24, a0, 13*SZREG + 0*SZFREG > + FREG_S $f25, a0, 13*SZREG + 1*SZFREG > + FREG_S $f26, a0, 13*SZREG + 2*SZFREG > + FREG_S $f27, a0, 13*SZREG + 3*SZFREG > + FREG_S $f28, a0, 13*SZREG + 4*SZFREG > + FREG_S $f29, a0, 13*SZREG + 5*SZFREG > + FREG_S $f30, a0, 13*SZREG + 6*SZFREG > + FREG_S $f31, a0, 13*SZREG + 7*SZFREG > +#endif > + > +#if !IS_IN (libc) && IS_IN(rtld) > + li.w v0, 0 > + jirl zero,ra,0 > +#else > + b __sigjmp_save > +#endif > +END (__sigsetjmp) > + > +hidden_def (__sigsetjmp) > +weak_alias (_setjmp, __GI__setjmp) > diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c > new file mode 100644 > index 0000000000..5b15f4815a > --- /dev/null > +++ b/sysdeps/loongarch/sotruss-lib.c > @@ -0,0 +1,50 @@ > +/* Override generic sotruss-lib.c to define actual functions for LoongArch. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#define HAVE_ARCH_PLTENTER > +#define HAVE_ARCH_PLTEXIT > + > +#include <elf/sotruss-lib.c> > + > +ElfW (Addr) > +la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), > + unsigned int ndx __attribute__ ((unused)), > + uintptr_t *refcook, uintptr_t *defcook, > + La_loongarch_regs *regs, unsigned int *flags, > + const char *symname, long int *framesizep) > +{ > + print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1], > + regs->lr_reg[2], *flags); > + > + /* No need to copy anything, we will not need the parameters in any case. */ > + *framesizep = 0; > + > + return sym->st_value; > +} > + > +unsigned int > +la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, > + uintptr_t *refcook, uintptr_t *defcook, > + const struct La_loongarch_regs *inregs, > + struct La_loongarch_retval *outregs, > + const char *symname) > +{ > + print_exit (refcook, defcook, symname, outregs->lrv_a0); > + > + return 0; > +} > diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S > new file mode 100644 > index 0000000000..a9b32aa966 > --- /dev/null > +++ b/sysdeps/loongarch/start.S > @@ -0,0 +1,67 @@ > +/* Startup code compliant to the ELF LoongArch ABI. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#define __ASSEMBLY__ 1 > +#include <entry.h> > +#include <sys/asm.h> > + > +/* The entry point's job is to call __libc_start_main. Per the ABI, > + a0 contains the address of a function to be passed to atexit. > + __libc_start_main wants this in a5. */ > + > +/* > +int > +__libc_start_main (int (*main) (int, char **, char **), > + int argc, > + char **argv, > + __typeof (main) init, > + void (*fini) (void), > + void (*rtld_fini) (void), > + void *stack_end); > + */ > + > +ENTRY (ENTRY_POINT) > + > +/* Terminate call stack by noting ra is undefined. Use a dummy > + .cfi_label to force starting the FDE. */ > + .cfi_label .Ldummy > + cfi_undefined (1) > + or a5, a0, zero /* rtld_fini */ > + > +/* We must get symbol main through GOT table, since main may not be local. > + For instance: googletest defines main in dynamic library. */ > + la.got a0, t0, main > + REG_L a1, sp, 0 > + ADDI a2, sp, SZREG > + > + /* Adjust $sp for 16-aligned */ > + SRLI sp, sp, 4 > + SLLI sp, sp, 4 > + > + move a3, zero /* used to be init */ > + move a4, zero /* used to be fini */ > + or a6, sp, zero /* stack_end */ > + > + la.got ra, t0, __libc_start_main > + jirl ra, ra, 0 > + > + la.got ra, t0, abort > + jirl ra, ra, 0 > +END (ENTRY_POINT) > + > diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h > new file mode 100644 > index 0000000000..b41ee59694 > --- /dev/null > +++ b/sysdeps/loongarch/sys/asm.h > @@ -0,0 +1,59 @@ > +/* Miscellaneous macros. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef _SYS_ASM_H > +#define _SYS_ASM_H > + > +#include <sys/regdef.h> > +#include <sysdeps/generic/sysdep.h> > + > +/* Macros to handle different pointer/register sizes for 32/64-bit code. */ > +#define SZREG 8 > +#define SZFREG 8 > +#define REG_L ld.d > +#define REG_S st.d > +#define SRLI srli.d > +#define SLLI slli.d > +#define ADDI addi.d > +#define ADD add.d > +#define BSTRINS bstrins.d > +#define LI li.d > +#define FREG_L fld.d > +#define FREG_S fst.d > + > +/* Declare leaf routine. */ > +#define LEAF(symbol) \ > + .text; \ > + .globl symbol; \ > + .align 3; \ > + cfi_startproc; \ > + .type symbol, @function; \ > + symbol: > + > +#define ENTRY(symbol) LEAF (symbol) > + > +/* Mark end of function. */ > +#undef END > +#define END(function) \ > + cfi_endproc; \ > + .size function, .- function; > + > +/* Stack alignment. */ > +#define ALMASK ~15 > + > +#endif /* sys/asm.h */ > diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h > new file mode 100644 > index 0000000000..e71948c86e > --- /dev/null > +++ b/sysdeps/loongarch/tst-audit.h > @@ -0,0 +1,23 @@ > +/* Definitions for testing PLT entry/exit auditing. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#define pltenter la_loongarch_gnu_pltenter > +#define pltexit la_loongarch_gnu_pltexit > +#define La_regs La_loongarch_regs > +#define La_retval La_loongarch_retval > +#define int_retval lrv_a0 > diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h > new file mode 100644 > index 0000000000..4887c30ca2 > --- /dev/null > +++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h > @@ -0,0 +1,26 @@ > +/* ldconfig default paths and libraries. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <http://www.gnu.org/licenses/>. */ > + > +#include <sysdeps/generic/ldconfig.h> > + > +#define SYSDEP_KNOWN_INTERPRETER_NAMES \ > + { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, > + > +#define SYSDEP_KNOWN_LIBRARY_NAMES \ > + { "libc.so.6", FLAG_ELF_LIBC6 }, \ > + { "libm.so.6", FLAG_ELF_LIBC6 }, > -- > 2.31.1 >
diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S new file mode 100644 index 0000000000..b7690dd94f --- /dev/null +++ b/sysdeps/loongarch/__longjmp.S @@ -0,0 +1,52 @@ +/* longjmp. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> + +ENTRY (__longjmp) + REG_L ra, a0, 0*SZREG + REG_L sp, a0, 1*SZREG + REG_L x, a0, 2*SZREG + REG_L fp, a0, 3*SZREG + REG_L s0, a0, 4*SZREG + REG_L s1, a0, 5*SZREG + REG_L s2, a0, 6*SZREG + REG_L s3, a0, 7*SZREG + REG_L s4, a0, 8*SZREG + REG_L s5, a0, 9*SZREG + REG_L s6, a0, 10*SZREG + REG_L s7, a0, 11*SZREG + REG_L s8, a0, 12*SZREG + +#ifndef __loongarch_soft_float + FREG_L $f24, a0, 13*SZREG + 0*SZFREG + FREG_L $f25, a0, 13*SZREG + 1*SZFREG + FREG_L $f26, a0, 13*SZREG + 2*SZFREG + FREG_L $f27, a0, 13*SZREG + 3*SZFREG + FREG_L $f28, a0, 13*SZREG + 4*SZFREG + FREG_L $f29, a0, 13*SZREG + 5*SZFREG + FREG_L $f30, a0, 13*SZREG + 6*SZFREG + FREG_L $f31, a0, 13*SZREG + 7*SZFREG +#endif + + sltui a0,a1,1 + ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 + jirl zero,ra,0 + +END (__longjmp) diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h new file mode 100644 index 0000000000..7290be7b18 --- /dev/null +++ b/sysdeps/loongarch/bits/endianness.h @@ -0,0 +1,11 @@ +#ifndef _BITS_ENDIANNESS_H +#define _BITS_ENDIANNESS_H 1 + +#ifndef _BITS_ENDIAN_H +#error "Never use <bits/endianness.h> directly; include <endian.h> instead." +#endif + +/* LoongArch is little-endian. */ +#define __BYTE_ORDER __LITTLE_ENDIAN + +#endif /* bits/endianness.h */ diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h new file mode 100644 index 0000000000..4df09989cb --- /dev/null +++ b/sysdeps/loongarch/bits/link.h @@ -0,0 +1,58 @@ +/* Machine-specific declarations for dynamic linker interface. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _LINK_H +#error "Never include <bits/link.h> directly; use <link.h> instead." +#endif + +typedef struct La_loongarch_regs +{ + unsigned long int lr_reg[8]; /* a0 - a7 */ + double lr_fpreg[8]; /* fa0 - fa7 */ + unsigned long int lr_ra; + unsigned long int lr_sp; +} La_loongarch_regs; + +/* Return values for calls from PLT on LoongArch. */ +typedef struct La_loongarch_retval +{ + unsigned long int lrv_a0; + unsigned long int lrv_a1; + double lrv_fa0; + double lrv_fa1; +} La_loongarch_retval; + +__BEGIN_DECLS + +extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym, + unsigned int __ndx, + uintptr_t *__refcook, + uintptr_t *__defcook, + La_loongarch_regs *__regs, + unsigned int *__flags, + const char *__symname, + long int *__framesizep); +extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym, + unsigned int __ndx, + uintptr_t *__refcook, + uintptr_t *__defcook, + const La_loongarch_regs *__inregs, + La_loongarch_retval *__outregs, + const char *__symname); + +__END_DECLS diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h new file mode 100644 index 0000000000..8b323ad2b6 --- /dev/null +++ b/sysdeps/loongarch/bits/setjmp.h @@ -0,0 +1,42 @@ +/* Define the machine-dependent type `jmp_buf'. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _LOONGARCH_BITS_SETJMP_H +#define _LOONGARCH_BITS_SETJMP_H + +typedef struct __jmp_buf_internal_tag +{ + /* Program counter. */ + long int __pc; + /* Stack pointer. */ + long int __sp; + /* Reserved */ + long int __x; + /* Frame pointer. */ + long int __fp; + /* Callee-saved registers. */ + long int __regs[9]; + +#ifndef __loongarch_soft_float + /* Callee-saved floating point registers. */ + double __fpregs[8]; +#endif + +} __jmp_buf[1]; + +#endif /* _LOONGARCH_BITS_SETJMP_H */ diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c new file mode 100644 index 0000000000..32f49441c3 --- /dev/null +++ b/sysdeps/loongarch/bsd-_setjmp.c @@ -0,0 +1 @@ +/* _setjmp is implemented in setjmp.S. */ diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c new file mode 100644 index 0000000000..45fd802aac --- /dev/null +++ b/sysdeps/loongarch/bsd-setjmp.c @@ -0,0 +1 @@ +/* setjmp is implemented in setjmp.S. */ diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h new file mode 100644 index 0000000000..4e19ad9319 --- /dev/null +++ b/sysdeps/loongarch/dl-machine.h @@ -0,0 +1,307 @@ +/* Machine-dependent ELF dynamic relocation inline functions. + Copyright (C) 2022 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef dl_machine_h +#define dl_machine_h + +#define ELF_MACHINE_NAME "LoongArch" + +#include <entry.h> +#include <elf/elf.h> +#include <sys/asm.h> +#include <dl-tls.h> +#include <dl-static-tls.h> +#include <dl-machine-rel.h> + +#ifndef _RTLD_PROLOGUE +# define _RTLD_PROLOGUE(entry) \ + ".globl\t" __STRING (entry) "\n\t" \ + ".type\t" __STRING (entry) ", @function\n\t" \ + CFI_STARTPROC "\n" \ + __STRING (entry) ":\n" +#endif + +#ifndef _RTLD_EPILOGUE +# define _RTLD_EPILOGUE(entry) \ + CFI_ENDPROC "\n\t" \ + ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n" +#endif + +#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT +#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE + +#define elf_machine_type_class(type) \ + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \ + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \ + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \ + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \ + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \ + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \ + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \ + | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY))) + +#define ELF_MACHINE_NO_REL 1 +#define ELF_MACHINE_NO_RELA 0 + +/* Return nonzero iff ELF header is compatible with the running host. */ +static inline int +elf_machine_matches_host (const ElfW (Ehdr) * ehdr) +{ + /* We can only run LoongArch binaries. */ + if (ehdr->e_machine != EM_LOONGARCH) + return 0; + + return 1; +} + +/* Return the run-time load address of the shared object. */ +static inline ElfW (Addr) elf_machine_load_address (void) +{ + extern const ElfW(Ehdr) __ehdr_start attribute_hidden; + return (ElfW(Addr)) &__ehdr_start; +} + +/* Return the link-time address of _DYNAMIC. */ +static inline ElfW (Addr) elf_machine_dynamic (void) +{ + extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; + return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); +} + +/* Initial entry point code for the dynamic linker. + The C function `_dl_start' is the real entry point; + its return value is the user program's entry point. */ + +#define RTLD_START \ + asm(".text\n\ + " _RTLD_PROLOGUE (ENTRY_POINT) "\ + .cfi_label .Ldummy \n\ + " CFI_UNDEFINED (1) " \n\ + or $a0, $sp, $zero \n\ + bl _dl_start \n\ + # Stash user entry point in s0. \n\ + or $s0, $v0, $zero \n\ + # Load the original argument count. \n\ + ld.d $a1, $sp, 0 \n\ + # Call _dl_init (struct link_map *main_map, int argc, char **argv, \ + char **env) \n\ + la $a0, _rtld_local \n\ + ld.d $a0, $a0, 0 \n\ + addi.d $a2, $sp, 8 \n\ + slli.d $a3, $a1, 3 \n\ + add.d $a3, $a3, $a2 \n\ + addi.d $a3, $a3, 8 \n\ + # Adjust $sp for 16-aligned \n\ + srli.d $t0, $sp, 4 \n\ + slli.d $t0, $t0, 4 \n\ + ori $t1, $sp, 0 \n\ + addi.d $sp, $t0, -32 \n\ + st.d $t1, $sp, 24 \n\ + # Call the function to run the initializers. \n\ + bl _dl_init \n\ + # Pass our finalizer function to _start. \n\ + ld.d $sp, $sp, 24 \n\ + la $a0, _dl_fini \n\ + # Jump to the user entry point. \n\ + jirl $zero, $s0, 0 \n\ + " _RTLD_EPILOGUE (ENTRY_POINT) "\ + .previous"); + +/* Names of the architecture-specific auditing callback functions. */ +#define ARCH_LA_PLTENTER loongarch_gnu_pltenter +#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit + +/* Bias .got.plt entry by the offset requested by the PLT header. */ +#define elf_machine_plt_value(map, reloc, value) (value) + +static inline ElfW (Addr) +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const ElfW (Sym) * refsym, const ElfW (Sym) * sym, + const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr, + ElfW (Addr) value) +{ + return *reloc_addr = value; +} + +#endif /* !dl_machine_h */ + +#ifdef RESOLVE_MAP + +/* Perform a relocation described by R_INFO at the location pointed to + by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and + MAP is the object containing the reloc. */ + +static inline void __attribute__ ((always_inline)) +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], + const ElfW (Rela) * reloc, + const ElfW (Sym) * sym, + const struct r_found_version *version, + void *const reloc_addr, int skip_ifunc) +{ + ElfW (Addr) r_info = reloc->r_info; + const unsigned long int r_type = ELFW (R_TYPE) (r_info); + ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr; + const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym; + struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type); + ElfW (Addr) value = 0; + if (sym_map != NULL) + value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; + + if (sym != NULL + && __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC) + && __glibc_likely (sym->st_shndx != SHN_UNDEF) + && __glibc_likely (!skip_ifunc)) + value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap)); + + switch (r_type) + { +#ifndef RTLD_BOOTSTRAP + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64: + R_LARCH_TLS_DTPMOD32: + if (sym_map) + *addr_field = sym_map->l_tls_modid; + break; + + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64: + R_LARCH_TLS_DTPREL32: + if (sym != NULL) + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend; + break; + + case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64: + R_LARCH_TLS_TPREL32: + if (sym != NULL) + { + CHECK_STATIC_TLS (map, sym_map); + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; + } + break; + + case R_LARCH_COPY: + { + if (sym == NULL) + /* This can happen in trace mode if an object could not be + found. */ + break; + if (__glibc_unlikely (sym->st_size > refsym->st_size) + || (__glibc_unlikely (sym->st_size < refsym->st_size) + && GLRO(dl_verbose))) + { + const char *strtab; + + strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); + _dl_error_printf ("\ +%s: Symbol `%s' has different size in shared object, consider re-linking\n", + rtld_progname ?: "<program name unknown>", + strtab + refsym->st_name); + } + memcpy (reloc_addr, (void *) value, + MIN (sym->st_size, refsym->st_size)); + break; + } +#endif + +#if !defined RTLD_BOOTSTRAP + case R_LARCH_RELATIVE: + *addr_field = map->l_addr + reloc->r_addend; + break; +#endif + + case R_LARCH_JUMP_SLOT: + case __WORDSIZE == 64 ? R_LARCH_64: + R_LARCH_32: + *addr_field = value; + break; + + case R_LARCH_IRELATIVE: + value = map->l_addr + reloc->r_addend; + if (__glibc_likely (!skip_ifunc)) + value = ((ElfW (Addr) (*) (void)) value) (); + *addr_field = value; + break; + + case R_LARCH_NONE: + break; + + default: + _dl_reloc_bad_type (map, r_type, 0); + break; + } +} + +static inline void __attribute__ ((always_inline)) +elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc, + void *const reloc_addr) +{ + *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend; +} + +static inline void __attribute__ ((always_inline)) +elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], + ElfW (Addr) l_addr, + const ElfW (Rela) * reloc, int skip_ifunc) +{ + ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset); + const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info); + + /* Check for unexpected PLT reloc type. */ + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT)) + { + if (__glibc_unlikely (map->l_mach.plt == 0)) + { + if (l_addr) + *reloc_addr += l_addr; + } + else + *reloc_addr = map->l_mach.plt; + } + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE)) + { + ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend); + if (__glibc_likely (!skip_ifunc)) + value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) (); + *reloc_addr = (ElfW (Addr)) value; + } + else + _dl_reloc_bad_type (map, r_type, 1); +} + +/* Set up the loaded object described by L so its stub function + will jump to the on-demand fixup code __dl_runtime_resolve. */ + +static inline int __attribute__ ((always_inline)) +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], + int lazy, int profile) +{ +#ifndef RTLD_BOOTSTRAP + /* If using PLTs, fill in the first two entries of .got.plt. */ + if (l->l_info[DT_JMPREL]) + { + extern void _dl_runtime_resolve (void) + __attribute__ ((visibility ("hidden"))); + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]); + gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve; + gotplt[1] = (ElfW (Addr)) l; + } +#endif + + return lazy; +} + +#endif /* RESOLVE_MAP */ diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S new file mode 100644 index 0000000000..eb610392f6 --- /dev/null +++ b/sysdeps/loongarch/dl-trampoline.S @@ -0,0 +1,91 @@ +/* PLT trampolines. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> + +/* Assembler veneer called from the PLT header code for lazy loading. + The PLT header passes its own args in t0-t2. */ + +#ifdef __loongarch_soft_float +# define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) +#else +# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK)) +#endif + +ENTRY (_dl_runtime_resolve) + + /* Save arguments to stack. */ + ADDI sp, sp, -FRAME_SIZE + + REG_S ra, sp, 9*SZREG + REG_S a0, sp, 1*SZREG + REG_S a1, sp, 2*SZREG + REG_S a2, sp, 3*SZREG + REG_S a3, sp, 4*SZREG + REG_S a4, sp, 5*SZREG + REG_S a5, sp, 6*SZREG + REG_S a6, sp, 7*SZREG + REG_S a7, sp, 8*SZREG + +#ifndef __loongarch_soft_float + FREG_S fa0, sp, 10*SZREG + 0*SZFREG + FREG_S fa1, sp, 10*SZREG + 1*SZFREG + FREG_S fa2, sp, 10*SZREG + 2*SZFREG + FREG_S fa3, sp, 10*SZREG + 3*SZFREG + FREG_S fa4, sp, 10*SZREG + 4*SZFREG + FREG_S fa5, sp, 10*SZREG + 5*SZFREG + FREG_S fa6, sp, 10*SZREG + 6*SZFREG + FREG_S fa7, sp, 10*SZREG + 7*SZFREG +#endif + + /* Update .got.plt and obtain runtime address of callee */ + SLLI a1, t1, 1 + or a0, t0, zero + ADD a1, a1, t1 + la a2, _dl_fixup + jirl ra, a2, 0 + or t1, v0, zero + + /* Restore arguments from stack. */ + REG_L ra, sp, 9*SZREG + REG_L a0, sp, 1*SZREG + REG_L a1, sp, 2*SZREG + REG_L a2, sp, 3*SZREG + REG_L a3, sp, 4*SZREG + REG_L a4, sp, 5*SZREG + REG_L a5, sp, 6*SZREG + REG_L a6, sp, 7*SZREG + REG_L a7, sp, 8*SZREG + +#ifndef __loongarch_soft_float + FREG_L fa0, sp, 10*SZREG + 0*SZFREG + FREG_L fa1, sp, 10*SZREG + 1*SZFREG + FREG_L fa2, sp, 10*SZREG + 2*SZFREG + FREG_L fa3, sp, 10*SZREG + 3*SZFREG + FREG_L fa4, sp, 10*SZREG + 4*SZFREG + FREG_L fa5, sp, 10*SZREG + 5*SZFREG + FREG_L fa6, sp, 10*SZREG + 6*SZFREG + FREG_L fa7, sp, 10*SZREG + 7*SZFREG +#endif + + ADDI sp, sp, FRAME_SIZE + + /* Invoke the callee. */ + jirl zero, t1, 0 +END (_dl_runtime_resolve) diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h new file mode 100644 index 0000000000..a4b8ea690e --- /dev/null +++ b/sysdeps/loongarch/jmpbuf-offsets.h @@ -0,0 +1,22 @@ +/* Private macros for accessing __jmp_buf contents. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <jmpbuf-unwind.h> + +/* Helper for generic ____longjmp_chk(). */ +#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf)) diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h new file mode 100644 index 0000000000..6fa509151d --- /dev/null +++ b/sysdeps/loongarch/jmpbuf-unwind.h @@ -0,0 +1,45 @@ +/* Examine __jmp_buf for unwinding frames. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <setjmp.h> +#include <stdint.h> +#include <unwind.h> +#include <sysdep.h> + +/* Test if longjmp to JMPBUF would unwind the frame + containing a local variable at ADDRESS. */ +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) + +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj) + +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs) +{ + uintptr_t sp = regs[0].__sp; +#ifdef PTR_DEMANGLE + PTR_DEMANGLE (sp); +#endif + return sp; +} + +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) + +/* We use the normal longjmp for unwinding. */ +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h new file mode 100644 index 0000000000..36b1b25b9f --- /dev/null +++ b/sysdeps/loongarch/ldsodefs.h @@ -0,0 +1,41 @@ +/* Run-time dynamic linker data structures for loaded ELF shared objects. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _LOONGARCH_LDSODEFS_H +#define _LOONGARCH_LDSODEFS_H 1 + +#include <elf.h> + +struct La_loongarch_regs; +struct La_loongarch_retval; + +#define ARCH_PLTENTER_MEMBERS \ + ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + const struct La_loongarch_regs *, \ + unsigned int *, const char *name, \ + long int *framesizep); + +#define ARCH_PLTEXIT_MEMBERS \ + unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \ + uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \ + struct La_loongarch_retval *, const char *); + +#include_next <ldsodefs.h> + +#endif diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h new file mode 100644 index 0000000000..bbba73ed70 --- /dev/null +++ b/sysdeps/loongarch/linkmap.h @@ -0,0 +1,22 @@ +/* Definition of link_map_machine. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +struct link_map_machine +{ + ElfW (Addr) plt; /* Address of .plt. */ +}; diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h new file mode 100644 index 0000000000..4a3cdd964e --- /dev/null +++ b/sysdeps/loongarch/machine-gmon.h @@ -0,0 +1,37 @@ +/* LoongArch definitions for profiling support. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +/* Accept 'frompc' address as argument from the function that calls + _mcount for profiling. Use __builtin_return_address (0) + for the 'selfpc' address. */ + +#include <sysdep.h> + +static void mcount_internal (unsigned long int frompc, + unsigned long int selfpc); + +#define _MCOUNT_DECL(frompc, selfpc) \ + static inline void mcount_internal (unsigned long int frompc, \ + unsigned long int selfpc) + +#define MCOUNT \ + void _mcount (void *frompc) \ + { \ + mcount_internal ((unsigned long int) frompc, \ + (unsigned long int) RETURN_ADDRESS (0)); \ + } diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S new file mode 100644 index 0000000000..b93ae2f5da --- /dev/null +++ b/sysdeps/loongarch/setjmp.S @@ -0,0 +1,66 @@ +/* setjmp for LoongArch. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> + +ENTRY (_setjmp) + li.w a1,0 + b __sigsetjmp +END (_setjmp) + +ENTRY (setjmp) + li.w a1,1 +END (setjmp) + +ENTRY (__sigsetjmp) + REG_S ra, a0, 0*SZREG + REG_S sp, a0, 1*SZREG + REG_S x, a0, 2*SZREG + REG_S fp, a0, 3*SZREG + REG_S s0, a0, 4*SZREG + REG_S s1, a0, 5*SZREG + REG_S s2, a0, 6*SZREG + REG_S s3, a0, 7*SZREG + REG_S s4, a0, 8*SZREG + REG_S s5, a0, 9*SZREG + REG_S s6, a0, 10*SZREG + REG_S s7, a0, 11*SZREG + REG_S s8, a0, 12*SZREG + +#ifndef __loongarch_soft_float + FREG_S $f24, a0, 13*SZREG + 0*SZFREG + FREG_S $f25, a0, 13*SZREG + 1*SZFREG + FREG_S $f26, a0, 13*SZREG + 2*SZFREG + FREG_S $f27, a0, 13*SZREG + 3*SZFREG + FREG_S $f28, a0, 13*SZREG + 4*SZFREG + FREG_S $f29, a0, 13*SZREG + 5*SZFREG + FREG_S $f30, a0, 13*SZREG + 6*SZFREG + FREG_S $f31, a0, 13*SZREG + 7*SZFREG +#endif + +#if !IS_IN (libc) && IS_IN(rtld) + li.w v0, 0 + jirl zero,ra,0 +#else + b __sigjmp_save +#endif +END (__sigsetjmp) + +hidden_def (__sigsetjmp) +weak_alias (_setjmp, __GI__setjmp) diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c new file mode 100644 index 0000000000..5b15f4815a --- /dev/null +++ b/sysdeps/loongarch/sotruss-lib.c @@ -0,0 +1,50 @@ +/* Override generic sotruss-lib.c to define actual functions for LoongArch. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#define HAVE_ARCH_PLTENTER +#define HAVE_ARCH_PLTEXIT + +#include <elf/sotruss-lib.c> + +ElfW (Addr) +la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)), + unsigned int ndx __attribute__ ((unused)), + uintptr_t *refcook, uintptr_t *defcook, + La_loongarch_regs *regs, unsigned int *flags, + const char *symname, long int *framesizep) +{ + print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1], + regs->lr_reg[2], *flags); + + /* No need to copy anything, we will not need the parameters in any case. */ + *framesizep = 0; + + return sym->st_value; +} + +unsigned int +la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx, + uintptr_t *refcook, uintptr_t *defcook, + const struct La_loongarch_regs *inregs, + struct La_loongarch_retval *outregs, + const char *symname) +{ + print_exit (refcook, defcook, symname, outregs->lrv_a0); + + return 0; +} diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S new file mode 100644 index 0000000000..a9b32aa966 --- /dev/null +++ b/sysdeps/loongarch/start.S @@ -0,0 +1,67 @@ +/* Startup code compliant to the ELF LoongArch ABI. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#define __ASSEMBLY__ 1 +#include <entry.h> +#include <sys/asm.h> + +/* The entry point's job is to call __libc_start_main. Per the ABI, + a0 contains the address of a function to be passed to atexit. + __libc_start_main wants this in a5. */ + +/* +int +__libc_start_main (int (*main) (int, char **, char **), + int argc, + char **argv, + __typeof (main) init, + void (*fini) (void), + void (*rtld_fini) (void), + void *stack_end); + */ + +ENTRY (ENTRY_POINT) + +/* Terminate call stack by noting ra is undefined. Use a dummy + .cfi_label to force starting the FDE. */ + .cfi_label .Ldummy + cfi_undefined (1) + or a5, a0, zero /* rtld_fini */ + +/* We must get symbol main through GOT table, since main may not be local. + For instance: googletest defines main in dynamic library. */ + la.got a0, t0, main + REG_L a1, sp, 0 + ADDI a2, sp, SZREG + + /* Adjust $sp for 16-aligned */ + SRLI sp, sp, 4 + SLLI sp, sp, 4 + + move a3, zero /* used to be init */ + move a4, zero /* used to be fini */ + or a6, sp, zero /* stack_end */ + + la.got ra, t0, __libc_start_main + jirl ra, ra, 0 + + la.got ra, t0, abort + jirl ra, ra, 0 +END (ENTRY_POINT) + diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h new file mode 100644 index 0000000000..b41ee59694 --- /dev/null +++ b/sysdeps/loongarch/sys/asm.h @@ -0,0 +1,59 @@ +/* Miscellaneous macros. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _SYS_ASM_H +#define _SYS_ASM_H + +#include <sys/regdef.h> +#include <sysdeps/generic/sysdep.h> + +/* Macros to handle different pointer/register sizes for 32/64-bit code. */ +#define SZREG 8 +#define SZFREG 8 +#define REG_L ld.d +#define REG_S st.d +#define SRLI srli.d +#define SLLI slli.d +#define ADDI addi.d +#define ADD add.d +#define BSTRINS bstrins.d +#define LI li.d +#define FREG_L fld.d +#define FREG_S fst.d + +/* Declare leaf routine. */ +#define LEAF(symbol) \ + .text; \ + .globl symbol; \ + .align 3; \ + cfi_startproc; \ + .type symbol, @function; \ + symbol: + +#define ENTRY(symbol) LEAF (symbol) + +/* Mark end of function. */ +#undef END +#define END(function) \ + cfi_endproc; \ + .size function, .- function; + +/* Stack alignment. */ +#define ALMASK ~15 + +#endif /* sys/asm.h */ diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h new file mode 100644 index 0000000000..e71948c86e --- /dev/null +++ b/sysdeps/loongarch/tst-audit.h @@ -0,0 +1,23 @@ +/* Definitions for testing PLT entry/exit auditing. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#define pltenter la_loongarch_gnu_pltenter +#define pltexit la_loongarch_gnu_pltexit +#define La_regs La_loongarch_regs +#define La_retval La_loongarch_retval +#define int_retval lrv_a0 diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h new file mode 100644 index 0000000000..4887c30ca2 --- /dev/null +++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h @@ -0,0 +1,26 @@ +/* ldconfig default paths and libraries. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdeps/generic/ldconfig.h> + +#define SYSDEP_KNOWN_INTERPRETER_NAMES \ + { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 }, + +#define SYSDEP_KNOWN_LIBRARY_NAMES \ + { "libc.so.6", FLAG_ELF_LIBC6 }, \ + { "libm.so.6", FLAG_ELF_LIBC6 },