[uclibc-ng-devel] patch for c-sky
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Message ID 20191024144750.GW29045@waldemar-brodkorb.de
State New
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  • [uclibc-ng-devel] patch for c-sky
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Commit Message

Waldemar Brodkorb Oct. 24, 2019, 2:47 p.m. UTC
Hi,

what do you think about attached patch to unbreak c-sky for kernel
5.x and gcc 9.2.
Tested in Qemu with static/shared builds.

best regards
 Waldemar

Comments

Guo Ren Oct. 24, 2019, 3:07 p.m. UTC | #1
Thx Waldemar,

Remove ARCH_HAS_DEPRECATED_SYSCALLS is OK for linux-5.x of csky.

C-SKY use asm-generic/fcntl.h

If you want to try csky linux-5.x qemu, here is the tips:
https://c-sky.gitlab.io/-/buildroot/-/jobs/331188230/artifacts/output/images/readme.txt

Best Regards
 Guo Ren

On Thu, Oct 24, 2019 at 10:48 PM Waldemar Brodkorb <wbx@uclibc-ng.org> wrote:
>
> Hi,
>
> what do you think about attached patch to unbreak c-sky for kernel
> 5.x and gcc 9.2.
> Tested in Qemu with static/shared builds.
>
> best regards
>  Waldemar
>
> _______________________________________________
> devel mailing list
> devel@uclibc-ng.org
> https://mailman.uclibc-ng.org/cgi-bin/mailman/listinfo/devel

Patch
diff mbox series

From 8a83450e77f84d713a9f5e617baedbb69a8e6f8e Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Wed, 23 Oct 2019 13:57:27 +0200
Subject: [PATCH] csky: add statx conditionals

Similar to glibc commit
https://sourceware.org/git/?p=glibc.git;a=commit;h=6bbfc5c09fc5b5e3d4a0cddbbd4e2e457767dae7
we need to handle Linux kernel change, which removed stat64 family from default syscall set.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
---
 extra/Configs/Config.csky              |  1 -
 include/fcntl.h                        |  5 ++
 include/sys/stat.h                     |  5 ++
 ldso/include/dl-syscall.h              | 62 ++++++++++++++++++++++-
 ldso/ldso/csky/elfinterp.c             | 10 +---
 libc/sysdeps/linux/common/bits/statx.h | 93 ++++++++++++++++++++++++++++++++++
 libc/sysdeps/linux/common/fstat.c      | 16 +++++-
 libc/sysdeps/linux/common/fstat64.c    | 17 +++++++
 libc/sysdeps/linux/common/lstat.c      | 19 ++++++-
 libc/sysdeps/linux/common/lstat64.c    | 17 +++++++
 libc/sysdeps/linux/common/stat.c       | 15 +++++-
 libc/sysdeps/linux/common/stat64.c     | 16 ++++++
 libc/sysdeps/linux/common/statx_cp.c   | 72 ++++++++++++++++++++++++++
 libc/sysdeps/linux/common/statx_cp.h   | 22 ++++++++
 libc/sysdeps/linux/csky/Makefile.arch  |  2 +-
 libc/sysdeps/linux/csky/bits/fcntl.h   |  6 +--
 16 files changed, 361 insertions(+), 17 deletions(-)
 create mode 100644 libc/sysdeps/linux/common/bits/statx.h
 create mode 100644 libc/sysdeps/linux/common/statx_cp.c
 create mode 100644 libc/sysdeps/linux/common/statx_cp.h

diff --git a/extra/Configs/Config.csky b/extra/Configs/Config.csky
index 3173ce91f..f5dc6832b 100644
--- a/extra/Configs/Config.csky
+++ b/extra/Configs/Config.csky
@@ -6,7 +6,6 @@  config FORCE_OPTIONS_FOR_ARCH
 	bool
 	default y
 	select ARCH_ANY_ENDIAN
-	select ARCH_HAS_DEPRECATED_SYSCALLS
 	select ARCH_USE_MMU
 	select ARCH_HAS_MMU
 
diff --git a/include/fcntl.h b/include/fcntl.h
index adcd7ef4b..e8a781f28 100644
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -67,6 +67,11 @@  __BEGIN_DECLS
 #  define AT_NO_AUTOMOUNT       0x800   /* Suppress terminal automount
                                            traversal.  */
 #  define AT_EMPTY_PATH         0x1000  /* Allow empty relative pathname.  */
+#  define AT_STATX_SYNC_TYPE    0x6000
+#  define AT_STATX_SYNC_AS_STAT 0x0000
+#  define AT_STATX_FORCE_SYNC   0x2000
+#  define AT_STATX_DONT_SYNC    0x4000
+#  define AT_RECURSIVE          0x8000  /* Apply to the entire subtree.  */
 # endif
 # define AT_EACCESS		0x200	/* Test access permitted for
 					   effective IDs, not real IDs.  */
diff --git a/include/sys/stat.h b/include/sys/stat.h
index 079e77903..c06177dad 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -393,6 +393,11 @@  extern int futimens (int __fd, const struct timespec __times[2]) __THROW;
 #undef _MKNOD_VER
 #define _MKNOD_VER 0
 
+#ifdef __USE_GNU
+# include <bits/statx.h>
+#endif
+
+
 __END_DECLS
 
 
diff --git a/ldso/include/dl-syscall.h b/ldso/include/dl-syscall.h
index 9d80c6a26..25a16fa8f 100644
--- a/ldso/include/dl-syscall.h
+++ b/ldso/include/dl-syscall.h
@@ -36,9 +36,37 @@  extern int _dl_errno;
 /* 1. common-generic ABI doesn't need kernel_stat translation
  * 3. S_IS?ID already provided by stat.h
  */
+#include <fcntl.h>
 #include <sys/stat.h>
+#include <dl-string.h>
+
+static __always_inline void
+__cp_stat_statx (struct stat *to, struct statx *from)
+{
+  _dl_memset (to, 0, sizeof (struct stat));
+  to->st_dev = ((from->stx_dev_minor & 0xff) | (from->stx_dev_major << 8)
+		| ((from->stx_dev_minor & ~0xff) << 12));
+  to->st_rdev = ((from->stx_rdev_minor & 0xff) | (from->stx_rdev_major << 8)
+		 | ((from->stx_rdev_minor & ~0xff) << 12));
+  to->st_ino = from->stx_ino;
+  to->st_mode = from->stx_mode;
+  to->st_nlink = from->stx_nlink;
+  to->st_uid = from->stx_uid;
+  to->st_gid = from->stx_gid;
+  to->st_atime = from->stx_atime.tv_sec;
+  to->st_atim.tv_nsec = from->stx_atime.tv_nsec;
+  to->st_mtime = from->stx_mtime.tv_sec;
+  to->st_mtim.tv_nsec = from->stx_mtime.tv_nsec;
+  to->st_ctime = from->stx_ctime.tv_sec;
+  to->st_ctim.tv_nsec = from->stx_ctime.tv_nsec;
+  to->st_size = from->stx_size;
+  to->st_blocks = from->stx_blocks;
+  to->st_blksize = from->stx_blksize;
+}
 #endif
 
+#define AT_NO_AUTOMOUNT       0x800
+#define AT_EMPTY_PATH         0x1000 
 
 /* Here are the definitions for some syscalls that are used
    by the dynamic linker.  The idea is that we want to be able
@@ -109,14 +137,46 @@  static __always_inline int _dl_stat(const char *file_name,
 # define __NR__dl_stat __NR_stat
 static __always_inline _syscall2(int, _dl_stat, const char *, file_name,
                         struct stat *, buf)
+
+#elif defined __NR_statx
+# define __NR__dl_statx __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
+
+static __always_inline _syscall5(int, _dl_statx, int, fd, const char *, file_name, int, flags,
+			         unsigned int, mask, struct statx *, buf);
+
+static __always_inline int _dl_stat(const char *file_name,
+                        struct stat *buf)
+{
+	struct statx tmp;
+	int rc = _dl_statx(AT_FDCWD, file_name, AT_NO_AUTOMOUNT, STATX_BASIC_STATS, &tmp);
+	if (rc == 0)
+		__cp_stat_statx ((struct stat *)buf, &tmp);
+	return rc;
+}
 #endif
 
 #if defined __NR_fstat64 && !defined __NR_fstat
 # define __NR__dl_fstat __NR_fstat64
 #elif defined __NR_fstat
 # define __NR__dl_fstat __NR_fstat
-#endif
 static __always_inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf)
+#else
+# define __NR__dl_fstatx __NR_statx
+static __always_inline _syscall5(int, _dl_fstatx, int, fd, const char *, file_name, int, flags, unsigned int, mask, struct stat *, buf);
+
+static __always_inline int _dl_fstat(int fd,
+                        struct stat *buf)
+{
+	struct statx tmp;
+	int rc = _dl_fstatx(fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &tmp);
+	if (rc == 0)
+		__cp_stat_statx ((struct stat *)buf, &tmp);
+	return rc;
+}
+
+#endif
 
 #define __NR__dl_munmap __NR_munmap
 static __always_inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length)
diff --git a/ldso/ldso/csky/elfinterp.c b/ldso/ldso/csky/elfinterp.c
index 9dba2a041..49cdaa39b 100644
--- a/ldso/ldso/csky/elfinterp.c
+++ b/ldso/ldso/csky/elfinterp.c
@@ -79,17 +79,11 @@  _dl_parse(struct elf_resolve *tpnt, struct r_scope_elem*scope,
                     strtab + symtab[symtab_index].st_name);
         if (unlikely(res < 0)) {
             int reloc_type = ELF32_R_TYPE(rpnt->r_info);
-
-#if defined (__SUPPORT_LD_DEBUG__)
-            _dl_dprintf(2, "2can't handle reloc type '%s' in lib '%s'\n",
-                    _dl_reltypes(reloc_type), tpnt->libname);
-#else
-            _dl_dprintf(2, "3can't handle reloc type %x in lib '%s'\n",
+            _dl_dprintf(2, "2can't handle reloc type %x in lib '%s'\n",
                     reloc_type, tpnt->libname);
-#endif
             return res;
         } else if (unlikely(res > 0)) {
-            _dl_dprintf(2, "4can't resolve symbol in lib '%s'.\n", tpnt->libname);
+            _dl_dprintf(2, "3can't resolve symbol in lib '%s'.\n", tpnt->libname);
             return res;
         }
     }
diff --git a/libc/sysdeps/linux/common/bits/statx.h b/libc/sysdeps/linux/common/bits/statx.h
new file mode 100644
index 000000000..eb9b8535c
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/statx.h
@@ -0,0 +1,93 @@ 
+/* Generic statx-related definitions and declarations.
+   Copyright (C) 2018-2019 Free Software Foundation, Inc.
+
+   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/>.  */
+
+/* This interface is based on <linux/stat.h> in Linux.  */
+
+#ifndef _SYS_STAT_H
+# error Never include <bits/statx.h> directly, include <sys/stat.h> instead.
+#endif
+
+struct statx_timestamp
+{
+  __int64_t tv_sec;
+  __uint32_t tv_nsec;
+  __int32_t __statx_timestamp_pad1[1];
+};
+
+/* Warning: The kernel may add additional fields to this struct in the
+   future.  Only use this struct for calling the statx function, not
+   for storing data.  (Expansion will be controlled by the mask
+   argument of the statx function.)  */
+struct statx
+{
+  __uint32_t stx_mask;
+  __uint32_t stx_blksize;
+  __uint64_t stx_attributes;
+  __uint32_t stx_nlink;
+  __uint32_t stx_uid;
+  __uint32_t stx_gid;
+  __uint16_t stx_mode;
+  __uint16_t __statx_pad1[1];
+  __uint64_t stx_ino;
+  __uint64_t stx_size;
+  __uint64_t stx_blocks;
+  __uint64_t stx_attributes_mask;
+  struct statx_timestamp stx_atime;
+  struct statx_timestamp stx_btime;
+  struct statx_timestamp stx_ctime;
+  struct statx_timestamp stx_mtime;
+  __uint32_t stx_rdev_major;
+  __uint32_t stx_rdev_minor;
+  __uint32_t stx_dev_major;
+  __uint32_t stx_dev_minor;
+  __uint64_t __statx_pad2[14];
+};
+
+#ifndef STATX_TYPE
+# define STATX_TYPE 0x0001U
+# define STATX_MODE 0x0002U
+# define STATX_NLINK 0x0004U
+# define STATX_UID 0x0008U
+# define STATX_GID 0x0010U
+# define STATX_ATIME 0x0020U
+# define STATX_MTIME 0x0040U
+# define STATX_CTIME 0x0080U
+# define STATX_INO 0x0100U
+# define STATX_SIZE 0x0200U
+# define STATX_BLOCKS 0x0400U
+# define STATX_BASIC_STATS 0x07ffU
+# define STATX_ALL 0x0fffU
+# define STATX_BTIME 0x0800U
+# define STATX__RESERVED 0x80000000U
+
+# define STATX_ATTR_COMPRESSED 0x0004
+# define STATX_ATTR_IMMUTABLE 0x0010
+# define STATX_ATTR_APPEND 0x0020
+# define STATX_ATTR_NODUMP 0x0040
+# define STATX_ATTR_ENCRYPTED 0x0800
+# define STATX_ATTR_AUTOMOUNT 0x1000
+#endif /* !STATX_TYPE */
+
+__BEGIN_DECLS
+
+/* Fill *BUF with information about PATH in DIRFD.  */
+int statx (int __dirfd, const char *__restrict __path, int __flags,
+           unsigned int __mask, struct statx *__restrict __buf)
+  __THROW __nonnull ((2, 5));
+
+__END_DECLS
+
diff --git a/libc/sysdeps/linux/common/fstat.c b/libc/sysdeps/linux/common/fstat.c
index 030360dfc..db629d390 100644
--- a/libc/sysdeps/linux/common/fstat.c
+++ b/libc/sysdeps/linux/common/fstat.c
@@ -29,6 +29,20 @@  int fstat(int fd, struct stat *buf)
 }
 libc_hidden_def(fstat)
 
+#elif __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int fstat(int fd, struct stat *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, fd, "", AT_EMPTY_PATH,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat_statx ((struct stat *)buf, &tmp);
+}
+libc_hidden_def(fstat)
+
 #elif defined __NR_fstat
 int fstat(int fd, struct stat *buf)
 {
@@ -57,7 +71,7 @@  int fstat(int fd, struct stat *buf)
 libc_hidden_def(fstat)
 #endif
 
-# if ! defined __NR_fstat64
+# if ! defined __NR_fstat64 && ! defined __NR_statx
 strong_alias_untyped(fstat,fstat64)
 libc_hidden_def(fstat64)
 #endif
diff --git a/libc/sysdeps/linux/common/fstat64.c b/libc/sysdeps/linux/common/fstat64.c
index 62995b2dc..c762816ef 100644
--- a/libc/sysdeps/linux/common/fstat64.c
+++ b/libc/sysdeps/linux/common/fstat64.c
@@ -28,9 +28,26 @@  int fstat64(int fd, struct stat64 *buf)
 		__xstat64_conv(&kbuf, buf);
 	}
 	return result;
+
 #else
 	return __syscall_fstat64(fd, buf);
 #endif
 }
 libc_hidden_def(fstat64)
+
+#elif __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int fstat64(int fd, struct stat64 *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, fd, "", AT_EMPTY_PATH,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat_statx ((struct stat64 *)buf, &tmp);
+
+      return rc;
+}
+libc_hidden_def(fstat64)
 #endif
diff --git a/libc/sysdeps/linux/common/lstat.c b/libc/sysdeps/linux/common/lstat.c
index 9d2024972..d4be38eb9 100644
--- a/libc/sysdeps/linux/common/lstat.c
+++ b/libc/sysdeps/linux/common/lstat.c
@@ -28,6 +28,23 @@  int lstat(const char *file_name, struct stat *buf)
 }
 libc_hidden_def(lstat)
 
+#elif defined __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int lstat(const char *file_name, struct stat *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name,
+                               AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat_statx ((struct stat *)buf, &tmp);
+
+      return rc;
+}
+libc_hidden_def(lstat)
+
 /* For systems which have both, prefer the old one */
 #else
 # include "xstatconv.h"
@@ -57,7 +74,7 @@  int lstat(const char *file_name, struct stat *buf)
 }
 libc_hidden_def(lstat)
 
-# if ! defined __NR_fstatat64 && ! defined __NR_lstat64
+# if ! defined __NR_fstatat64 && ! defined __NR_lstat64 && ! defined __NR_statx
 strong_alias_untyped(lstat,lstat64)
 libc_hidden_def(lstat64)
 # endif
diff --git a/libc/sysdeps/linux/common/lstat64.c b/libc/sysdeps/linux/common/lstat64.c
index 2f66e7ca2..15ef65939 100644
--- a/libc/sysdeps/linux/common/lstat64.c
+++ b/libc/sysdeps/linux/common/lstat64.c
@@ -29,6 +29,23 @@  int lstat64(const char *file_name, struct stat64 *buf)
 }
 libc_hidden_def(lstat64)
 
+#elif defined __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int lstat64(const char *file_name, struct stat64 *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name,
+                               AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat64_statx ((struct stat64 *)buf, &tmp);
+
+      return rc;
+}
+libc_hidden_def(lstat64)
+
 /* For systems which have both, prefer the old one */
 #elif defined __NR_lstat64
 # include "xstatconv.h"
diff --git a/libc/sysdeps/linux/common/stat.c b/libc/sysdeps/linux/common/stat.c
index 6489d229b..9aa8af3ac 100644
--- a/libc/sysdeps/linux/common/stat.c
+++ b/libc/sysdeps/linux/common/stat.c
@@ -27,7 +27,20 @@  int stat(const char *file_name, struct stat *buf)
 {
 	return fstatat64(AT_FDCWD, file_name, buf, 0);
 }
+#elif __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
 
+int stat(const char *file_name, struct stat *buf)
+{
+	struct statx tmp;
+	int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name, AT_NO_AUTOMOUNT,
+                                STATX_BASIC_STATS, &tmp);
+	if (rc == 0)
+		__cp_stat_statx ((struct stat *)buf, &tmp);
+
+	return rc;
+}
 #else
 # include "xstatconv.h"
 
@@ -58,7 +71,7 @@  int stat(const char *file_name, struct stat *buf)
 #endif /* __NR_fstat64 */
 libc_hidden_def(stat)
 
-#if ! defined __NR_stat64 && ! defined __NR_fstatat64
+#if ! defined __NR_stat64 && ! defined __NR_fstatat64 && ! defined __NR_statx
 strong_alias_untyped(stat,stat64)
 libc_hidden_def(stat64)
 #endif
diff --git a/libc/sysdeps/linux/common/stat64.c b/libc/sysdeps/linux/common/stat64.c
index ef365c7e7..771660a45 100644
--- a/libc/sysdeps/linux/common/stat64.c
+++ b/libc/sysdeps/linux/common/stat64.c
@@ -20,6 +20,22 @@  int stat64(const char *file_name, struct stat64 *buf)
 }
 libc_hidden_def(stat64)
 
+#elif __NR_statx
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int stat64(const char *file_name, struct stat64 *buf)
+{
+	struct statx tmp;
+	int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name, AT_NO_AUTOMOUNT,
+                                STATX_BASIC_STATS, &tmp);
+	if (rc == 0)
+		__cp_stat_statx ((struct stat64 *)buf, &tmp);
+
+	return rc;
+}
+libc_hidden_def(stat64)
+
 /* For systems which have both, prefer the old one */
 # elif defined __NR_stat64
 # define __NR___syscall_stat64 __NR_stat64
diff --git a/libc/sysdeps/linux/common/statx_cp.c b/libc/sysdeps/linux/common/statx_cp.c
new file mode 100644
index 000000000..1a6253b4d
--- /dev/null
+++ b/libc/sysdeps/linux/common/statx_cp.c
@@ -0,0 +1,72 @@ 
+/* Struct statx to stat/stat64 conversion for Linux.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   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 <stddef.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <statx_cp.h>
+
+#if !defined(__NR_fstat64) || !defined(__NR_fstatat64)
+void
+__cp_stat64_statx (struct stat64 *to, struct statx *from)
+{
+  memset (to, 0, sizeof (struct stat64));
+  to->st_dev = ((from->stx_dev_minor & 0xff) | (from->stx_dev_major << 8)
+		| ((from->stx_dev_minor & ~0xff) << 12));
+  to->st_rdev = ((from->stx_rdev_minor & 0xff) | (from->stx_rdev_major << 8)
+		 | ((from->stx_rdev_minor & ~0xff) << 12));
+  to->st_ino = from->stx_ino;
+  to->st_mode = from->stx_mode;
+  to->st_nlink = from->stx_nlink;
+  to->st_uid = from->stx_uid;
+  to->st_gid = from->stx_gid;
+  to->st_atime = from->stx_atime.tv_sec;
+  to->st_atim.tv_nsec = from->stx_atime.tv_nsec;
+  to->st_mtime = from->stx_mtime.tv_sec;
+  to->st_mtim.tv_nsec = from->stx_mtime.tv_nsec;
+  to->st_ctime = from->stx_ctime.tv_sec;
+  to->st_ctim.tv_nsec = from->stx_ctime.tv_nsec;
+  to->st_size = from->stx_size;
+  to->st_blocks = from->stx_blocks;
+  to->st_blksize = from->stx_blksize;
+}
+
+void
+__cp_stat_statx (struct stat *to, struct statx *from)
+{
+  memset (to, 0, sizeof (struct stat));
+  to->st_dev = ((from->stx_dev_minor & 0xff) | (from->stx_dev_major << 8)
+		| ((from->stx_dev_minor & ~0xff) << 12));
+  to->st_rdev = ((from->stx_rdev_minor & 0xff) | (from->stx_rdev_major << 8)
+		 | ((from->stx_rdev_minor & ~0xff) << 12));
+  to->st_ino = from->stx_ino;
+  to->st_mode = from->stx_mode;
+  to->st_nlink = from->stx_nlink;
+  to->st_uid = from->stx_uid;
+  to->st_gid = from->stx_gid;
+  to->st_atime = from->stx_atime.tv_sec;
+  to->st_atim.tv_nsec = from->stx_atime.tv_nsec;
+  to->st_mtime = from->stx_mtime.tv_sec;
+  to->st_mtim.tv_nsec = from->stx_mtime.tv_nsec;
+  to->st_ctime = from->stx_ctime.tv_sec;
+  to->st_ctim.tv_nsec = from->stx_ctime.tv_nsec;
+  to->st_size = from->stx_size;
+  to->st_blocks = from->stx_blocks;
+  to->st_blksize = from->stx_blksize;
+}
+#endif
diff --git a/libc/sysdeps/linux/common/statx_cp.h b/libc/sysdeps/linux/common/statx_cp.h
new file mode 100644
index 000000000..ff8fc9931
--- /dev/null
+++ b/libc/sysdeps/linux/common/statx_cp.h
@@ -0,0 +1,22 @@ 
+/* Struct statx to stat/stat64 conversion for Linux.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   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/>.  */
+
+extern void __cp_stat64_statx (struct stat64 *to, struct statx *from)
+  attribute_hidden;
+
+extern void __cp_stat_statx (struct stat *to, struct statx *from)
+  attribute_hidden;
diff --git a/libc/sysdeps/linux/csky/Makefile.arch b/libc/sysdeps/linux/csky/Makefile.arch
index 704b36aff..a3157c265 100644
--- a/libc/sysdeps/linux/csky/Makefile.arch
+++ b/libc/sysdeps/linux/csky/Makefile.arch
@@ -1,6 +1,6 @@ 
 CSRC-y := clone.c __syscall_error.c cacheflush.c
 
 SSRC-y := __longjmp.S setjmp.S
-SSRC-y += libc-read_tp.S vfork.S csky_clone.S
+SSRC-y += libc-read_tp.S csky_clone.S
 
 
diff --git a/libc/sysdeps/linux/csky/bits/fcntl.h b/libc/sysdeps/linux/csky/bits/fcntl.h
index b434badd6..de8a8a0bc 100644
--- a/libc/sysdeps/linux/csky/bits/fcntl.h
+++ b/libc/sysdeps/linux/csky/bits/fcntl.h
@@ -33,13 +33,13 @@ 
 #define O_ASYNC		 020000
 
 #ifdef __USE_XOPEN2K8
-# define O_DIRECTORY	 040000	/* Must be a directory.	 */
-# define O_NOFOLLOW	0100000	/* Do not follow links.	 */
+# define O_DIRECTORY   00200000	/* must be a directory */
+# define O_NOFOLLOW    00400000	/* don't follow links */
 # define O_CLOEXEC     02000000 /* Set close_on_exec.  */
 #endif
 
 #ifdef __USE_GNU
-# define O_DIRECT	0200000	/* Direct disk access.	*/
+# define O_DIRECT      00040000	/* direct disk access hint */
 # define O_NOATIME     01000000 /* Do not set atime.  */
 # define O_PATH       010000000 /* Resolve pathname but do not open file.  */
 #endif
-- 
2.11.0