| Message ID | 1325707195-3218-15-git-send-email-graeme.russ@gmail.com |
|---|---|
| State | Awaiting Upstream |
| Delegated to: | Graeme Russ |
| Headers | show |
Hi Graeme, On Wed, Jan 4, 2012 at 11:59 AM, Graeme Russ <graeme.russ@gmail.com> wrote: > Signed-off-by: Graeme Russ <graeme.russ@gmail.com> > --- > Changes for v2: > - None > > arch/x86/lib/Makefile | 1 + > arch/x86/lib/board.c | 69 +--------------------------- > arch/x86/lib/relocate.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 118 insertions(+), 67 deletions(-) > create mode 100644 arch/x86/lib/relocate.c Sorry - these comments are for future reference, since all you are doing here is moving code. But I might as well send them here. > > diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile > index 7820895..57b6896 100644 > --- a/arch/x86/lib/Makefile > +++ b/arch/x86/lib/Makefile > @@ -40,6 +40,7 @@ COBJS-$(CONFIG_SYS_GENERIC_TIMER) += pcat_timer.o > COBJS-$(CONFIG_PCI) += pci.o > COBJS-$(CONFIG_PCI) += pci_type1.o > COBJS-$(CONFIG_SYS_X86_REALMODE) += realmode.o > +COBJS-y += relocate.o > COBJS-y += string.o > COBJS-$(CONFIG_SYS_X86_ISR_TIMER) += timer.o > COBJS-$(CONFIG_VIDEO) += video_bios.o > diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c > index 416aa9e..bebb347 100644 > --- a/arch/x86/lib/board.c > +++ b/arch/x86/lib/board.c > @@ -41,7 +41,6 @@ > #include <ide.h> > #include <serial.h> > #include <asm/u-boot-x86.h> > -#include <elf.h> > #include <asm/processor.h> > > #ifdef CONFIG_BITBANGMII > @@ -117,9 +116,6 @@ static void display_flash_config(ulong size) > typedef int (init_fnc_t) (void); > > static int calculate_relocation_address(void); > -static int copy_uboot_to_ram(void); > -static int clear_bss(void); > -static int do_elf_reloc_fixups(void); > static int copy_gd_to_ram(void); > > init_fnc_t *init_sequence_f[] = { > @@ -183,59 +179,6 @@ static int calculate_relocation_address(void) > return 0; > } > > -static int copy_uboot_to_ram(void) > -{ > - size_t len = (size_t)&__data_end - (size_t)&__text_start; > - > - memcpy((void *)gd->relocaddr, (void *)&__text_start, len); > - > - return 0; > -} > - > -static int clear_bss(void) > -{ > - ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; > - size_t len = (size_t)&__bss_end - (size_t)&__bss_start; > - > - memset((void *)dst_addr, 0x00, len); > - > - return 0; > -} > - > -static int do_elf_reloc_fixups(void) > -{ > - Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start); > - Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end); > - > - Elf32_Addr *offset_ptr_rom; > - Elf32_Addr *offset_ptr_ram; > - > - /* The size of the region of u-boot that runs out of RAM. */ > - uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; > - > - do { > - /* Get the location from the relocation entry */ > - offset_ptr_rom = (Elf32_Addr *)re_src->r_offset; > - > - /* Check that the location of the relocation is in .text */ > - if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { perhaps: if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE) { > - > - /* Switch to the in-RAM version */ > - offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + > - gd->reloc_off); > - > - /* Check that the target points into .text */ > - if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && > - *offset_ptr_ram < > - (CONFIG_SYS_TEXT_BASE + size)) { > - *offset_ptr_ram += gd->reloc_off; Can the target not pointer into data? I think you are allowing this anyway with your test, but are you sure this comment is right? > - } > - } > - } while (re_src++ < re_end); Should this while() condition go at the top? What if the table has no entries? Regards, Simon > - > - return 0; > -} > - > /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */ > void board_init_f(ulong boot_flags) > { > @@ -270,17 +213,9 @@ void board_init_f_r(void) > if (init_cache() != 0) > hang(); > > - copy_uboot_to_ram(); > - clear_bss(); > - do_elf_reloc_fixups(); > - > - /* > - * Transfer execution from Flash to RAM by calculating the address > - * of the in-RAM copy of board_init_r() and calling it > - */ > - (board_init_r + gd->reloc_off)(gd, gd->relocaddr); > + relocate_code(0, gd, 0); > > - /* NOTREACHED - board_init_r() does not return */ > + /* NOTREACHED - relocate_code() does not return */ > while (1) > ; > } > diff --git a/arch/x86/lib/relocate.c b/arch/x86/lib/relocate.c > new file mode 100644 > index 0000000..badb5f8 > --- /dev/null > +++ b/arch/x86/lib/relocate.c > @@ -0,0 +1,115 @@ > +/* > + * (C) Copyright 2008-2011 > + * Graeme Russ, <graeme.russ@gmail.com> > + * > + * (C) Copyright 2002 > + * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> > + * > + * (C) Copyright 2002 > + * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> > + * > + * (C) Copyright 2002 > + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> > + * Marius Groeger <mgroeger@sysgo.de> > + * > + * See file CREDITS for list of people who contributed to this > + * project. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program 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 General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, > + * MA 02111-1307 USA > + */ > + > +#include <common.h> > +#include <malloc.h> > +#include <asm/u-boot-x86.h> > +#include <elf.h> > + > +static int copy_uboot_to_ram(void); > +static int clear_bss(void); > +static int do_elf_reloc_fixups(void); > + > +static int copy_uboot_to_ram(void) > +{ > + size_t len = (size_t)&__data_end - (size_t)&__text_start; > + > + memcpy((void *)gd->relocaddr, (void *)&__text_start, len); > + > + return 0; > +} > + > +static int clear_bss(void) > +{ > + ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; > + size_t len = (size_t)&__bss_end - (size_t)&__bss_start; > + > + memset((void *)dst_addr, 0x00, len); > + > + return 0; > +} > + > +static int do_elf_reloc_fixups(void) > +{ > + Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start); > + Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end); > + > + Elf32_Addr *offset_ptr_rom; > + Elf32_Addr *offset_ptr_ram; > + > + /* The size of the region of u-boot that runs out of RAM. */ > + uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; > + > + do { > + /* Get the location from the relocation entry */ > + offset_ptr_rom = (Elf32_Addr *)re_src->r_offset; > + > + /* Check that the location of the relocation is in .text */ > + if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { > + > + /* Switch to the in-RAM version */ > + offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + > + gd->reloc_off); > + > + /* Check that the target points into .text */ > + if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && > + *offset_ptr_ram < > + (CONFIG_SYS_TEXT_BASE + size)) { > + *offset_ptr_ram += gd->reloc_off; > + } > + } > + } while (re_src++ < re_end); > + > + return 0; > +} > + > +void relocate_code(ulong dummy_1, gd_t *id, ulong dummy_2) > +{ > + /* > + * Copy U-Boot into RAM, clear the BSS and perform relocation > + * adjustments > + */ > + copy_uboot_to_ram(); > + clear_bss(); > + do_elf_reloc_fixups(); > + > + /* > + * Transfer execution from Flash to RAM by calculating the address > + * of the in-RAM copy of board_init_r() and calling it > + */ > + (board_init_r + gd->reloc_off)(gd, gd->relocaddr); > + > + /* NOTREACHED - board_init_r() does not return */ > + while (1) > + ; > +} > -- > 1.7.5.2.317.g391b14 > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot
Hi Simon, On 08/01/12 09:15, Simon Glass wrote: > Hi Graeme, > > On Wed, Jan 4, 2012 at 11:59 AM, Graeme Russ <graeme.russ@gmail.com> wrote: >> Signed-off-by: Graeme Russ <graeme.russ@gmail.com> >> --- >> Changes for v2: >> - None >> >> arch/x86/lib/Makefile | 1 + >> arch/x86/lib/board.c | 69 +--------------------------- >> arch/x86/lib/relocate.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 118 insertions(+), 67 deletions(-) >> create mode 100644 arch/x86/lib/relocate.c > > Sorry - these comments are for future reference, since all you are > doing here is moving code. But I might as well send them here. Yes, your comments are good for future reference when the relocation code becomes common [snip] >> - /* Check that the location of the relocation is in .text */ >> - if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { > > perhaps: > > if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE) { Yep > >> - >> - /* Switch to the in-RAM version */ >> - offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + >> - gd->reloc_off); >> - >> - /* Check that the target points into .text */ >> - if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && >> - *offset_ptr_ram < >> - (CONFIG_SYS_TEXT_BASE + size)) { >> - *offset_ptr_ram += gd->reloc_off; > > Can the target not pointer into data? I think you are allowing this > anyway with your test, but are you sure this comment is right? You are correct, target is not necessarily .text > >> - } >> - } >> - } while (re_src++ < re_end); > > Should this while() condition go at the top? What if the table has no entries? An absurdly unlikely scenario, but worth changing for strict correctness Regards, Graeme
Hi Graeme, On Sun, Jan 8, 2012 at 1:04 AM, Graeme Russ <graeme.russ@gmail.com> wrote: > Hi Simon, > > On 08/01/12 09:15, Simon Glass wrote: >> Hi Graeme, >> >> On Wed, Jan 4, 2012 at 11:59 AM, Graeme Russ <graeme.russ@gmail.com> wrote: >>> Signed-off-by: Graeme Russ <graeme.russ@gmail.com> >>> --- >>> Changes for v2: >>> - None >>> >>> arch/x86/lib/Makefile | 1 + >>> arch/x86/lib/board.c | 69 +--------------------------- >>> arch/x86/lib/relocate.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++ >>> 3 files changed, 118 insertions(+), 67 deletions(-) >>> create mode 100644 arch/x86/lib/relocate.c >> >> Sorry - these comments are for future reference, since all you are >> doing here is moving code. But I might as well send them here. > > Yes, your comments are good for future reference when the relocation code > becomes common > > [snip] > >>> - /* Check that the location of the relocation is in .text */ >>> - if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { >> >> perhaps: >> >> if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE) { > > Yep > >> >>> - >>> - /* Switch to the in-RAM version */ >>> - offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + >>> - gd->reloc_off); >>> - >>> - /* Check that the target points into .text */ >>> - if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && >>> - *offset_ptr_ram < >>> - (CONFIG_SYS_TEXT_BASE + size)) { >>> - *offset_ptr_ram += gd->reloc_off; >> >> Can the target not pointer into data? I think you are allowing this >> anyway with your test, but are you sure this comment is right? > > You are correct, target is not necessarily .text > >> >>> - } >>> - } >>> - } while (re_src++ < re_end); >> >> Should this while() condition go at the top? What if the table has no entries? > > An absurdly unlikely scenario, but worth changing for strict correctness Hoping we can one day support relocating to an address known at link time... Regards, Simon > > Regards, > > Graeme
On Wed, Jan 4, 2012 at 11:59 AM, Graeme Russ <graeme.russ@gmail.com> wrote: > Signed-off-by: Graeme Russ <graeme.russ@gmail.com> Acked-by: Simon Glass <sjg@chromium.org> > --- > Changes for v2: > - None > > arch/x86/lib/Makefile | 1 + > arch/x86/lib/board.c | 69 +--------------------------- > arch/x86/lib/relocate.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 118 insertions(+), 67 deletions(-) > create mode 100644 arch/x86/lib/relocate.c > > diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile > index 7820895..57b6896 100644 > --- a/arch/x86/lib/Makefile > +++ b/arch/x86/lib/Makefile > @@ -40,6 +40,7 @@ COBJS-$(CONFIG_SYS_GENERIC_TIMER) += pcat_timer.o > COBJS-$(CONFIG_PCI) += pci.o > COBJS-$(CONFIG_PCI) += pci_type1.o > COBJS-$(CONFIG_SYS_X86_REALMODE) += realmode.o > +COBJS-y += relocate.o > COBJS-y += string.o > COBJS-$(CONFIG_SYS_X86_ISR_TIMER) += timer.o > COBJS-$(CONFIG_VIDEO) += video_bios.o > diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c > index 416aa9e..bebb347 100644 > --- a/arch/x86/lib/board.c > +++ b/arch/x86/lib/board.c > @@ -41,7 +41,6 @@ > #include <ide.h> > #include <serial.h> > #include <asm/u-boot-x86.h> > -#include <elf.h> > #include <asm/processor.h> > > #ifdef CONFIG_BITBANGMII > @@ -117,9 +116,6 @@ static void display_flash_config(ulong size) > typedef int (init_fnc_t) (void); > > static int calculate_relocation_address(void); > -static int copy_uboot_to_ram(void); > -static int clear_bss(void); > -static int do_elf_reloc_fixups(void); > static int copy_gd_to_ram(void); > > init_fnc_t *init_sequence_f[] = { > @@ -183,59 +179,6 @@ static int calculate_relocation_address(void) > return 0; > } > > -static int copy_uboot_to_ram(void) > -{ > - size_t len = (size_t)&__data_end - (size_t)&__text_start; > - > - memcpy((void *)gd->relocaddr, (void *)&__text_start, len); > - > - return 0; > -} > - > -static int clear_bss(void) > -{ > - ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; > - size_t len = (size_t)&__bss_end - (size_t)&__bss_start; > - > - memset((void *)dst_addr, 0x00, len); > - > - return 0; > -} > - > -static int do_elf_reloc_fixups(void) > -{ > - Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start); > - Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end); > - > - Elf32_Addr *offset_ptr_rom; > - Elf32_Addr *offset_ptr_ram; > - > - /* The size of the region of u-boot that runs out of RAM. */ > - uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; > - > - do { > - /* Get the location from the relocation entry */ > - offset_ptr_rom = (Elf32_Addr *)re_src->r_offset; > - > - /* Check that the location of the relocation is in .text */ > - if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { > - > - /* Switch to the in-RAM version */ > - offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + > - gd->reloc_off); > - > - /* Check that the target points into .text */ > - if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && > - *offset_ptr_ram < > - (CONFIG_SYS_TEXT_BASE + size)) { > - *offset_ptr_ram += gd->reloc_off; > - } > - } > - } while (re_src++ < re_end); > - > - return 0; > -} > - > /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */ > void board_init_f(ulong boot_flags) > { > @@ -270,17 +213,9 @@ void board_init_f_r(void) > if (init_cache() != 0) > hang(); > > - copy_uboot_to_ram(); > - clear_bss(); > - do_elf_reloc_fixups(); > - > - /* > - * Transfer execution from Flash to RAM by calculating the address > - * of the in-RAM copy of board_init_r() and calling it > - */ > - (board_init_r + gd->reloc_off)(gd, gd->relocaddr); > + relocate_code(0, gd, 0); > > - /* NOTREACHED - board_init_r() does not return */ > + /* NOTREACHED - relocate_code() does not return */ > while (1) > ; > } > diff --git a/arch/x86/lib/relocate.c b/arch/x86/lib/relocate.c > new file mode 100644 > index 0000000..badb5f8 > --- /dev/null > +++ b/arch/x86/lib/relocate.c > @@ -0,0 +1,115 @@ > +/* > + * (C) Copyright 2008-2011 > + * Graeme Russ, <graeme.russ@gmail.com> > + * > + * (C) Copyright 2002 > + * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> > + * > + * (C) Copyright 2002 > + * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> > + * > + * (C) Copyright 2002 > + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> > + * Marius Groeger <mgroeger@sysgo.de> > + * > + * See file CREDITS for list of people who contributed to this > + * project. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program 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 General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, > + * MA 02111-1307 USA > + */ > + > +#include <common.h> > +#include <malloc.h> > +#include <asm/u-boot-x86.h> > +#include <elf.h> > + > +static int copy_uboot_to_ram(void); > +static int clear_bss(void); > +static int do_elf_reloc_fixups(void); > + > +static int copy_uboot_to_ram(void) > +{ > + size_t len = (size_t)&__data_end - (size_t)&__text_start; > + > + memcpy((void *)gd->relocaddr, (void *)&__text_start, len); > + > + return 0; > +} > + > +static int clear_bss(void) > +{ > + ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; > + size_t len = (size_t)&__bss_end - (size_t)&__bss_start; > + > + memset((void *)dst_addr, 0x00, len); > + > + return 0; > +} > + > +static int do_elf_reloc_fixups(void) > +{ > + Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start); > + Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end); > + > + Elf32_Addr *offset_ptr_rom; > + Elf32_Addr *offset_ptr_ram; > + > + /* The size of the region of u-boot that runs out of RAM. */ > + uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; > + > + do { > + /* Get the location from the relocation entry */ > + offset_ptr_rom = (Elf32_Addr *)re_src->r_offset; > + > + /* Check that the location of the relocation is in .text */ > + if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { > + > + /* Switch to the in-RAM version */ > + offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + > + gd->reloc_off); > + > + /* Check that the target points into .text */ > + if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && > + *offset_ptr_ram < > + (CONFIG_SYS_TEXT_BASE + size)) { > + *offset_ptr_ram += gd->reloc_off; > + } > + } > + } while (re_src++ < re_end); > + > + return 0; > +} > + > +void relocate_code(ulong dummy_1, gd_t *id, ulong dummy_2) > +{ > + /* > + * Copy U-Boot into RAM, clear the BSS and perform relocation > + * adjustments > + */ > + copy_uboot_to_ram(); > + clear_bss(); > + do_elf_reloc_fixups(); > + > + /* > + * Transfer execution from Flash to RAM by calculating the address > + * of the in-RAM copy of board_init_r() and calling it > + */ > + (board_init_r + gd->reloc_off)(gd, gd->relocaddr); > + > + /* NOTREACHED - board_init_r() does not return */ > + while (1) > + ; > +} > -- > 1.7.5.2.317.g391b14 > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index 7820895..57b6896 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -40,6 +40,7 @@ COBJS-$(CONFIG_SYS_GENERIC_TIMER) += pcat_timer.o COBJS-$(CONFIG_PCI) += pci.o COBJS-$(CONFIG_PCI) += pci_type1.o COBJS-$(CONFIG_SYS_X86_REALMODE) += realmode.o +COBJS-y += relocate.o COBJS-y += string.o COBJS-$(CONFIG_SYS_X86_ISR_TIMER) += timer.o COBJS-$(CONFIG_VIDEO) += video_bios.o diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c index 416aa9e..bebb347 100644 --- a/arch/x86/lib/board.c +++ b/arch/x86/lib/board.c @@ -41,7 +41,6 @@ #include <ide.h> #include <serial.h> #include <asm/u-boot-x86.h> -#include <elf.h> #include <asm/processor.h> #ifdef CONFIG_BITBANGMII @@ -117,9 +116,6 @@ static void display_flash_config(ulong size) typedef int (init_fnc_t) (void); static int calculate_relocation_address(void); -static int copy_uboot_to_ram(void); -static int clear_bss(void); -static int do_elf_reloc_fixups(void); static int copy_gd_to_ram(void); init_fnc_t *init_sequence_f[] = { @@ -183,59 +179,6 @@ static int calculate_relocation_address(void) return 0; } -static int copy_uboot_to_ram(void) -{ - size_t len = (size_t)&__data_end - (size_t)&__text_start; - - memcpy((void *)gd->relocaddr, (void *)&__text_start, len); - - return 0; -} - -static int clear_bss(void) -{ - ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; - size_t len = (size_t)&__bss_end - (size_t)&__bss_start; - - memset((void *)dst_addr, 0x00, len); - - return 0; -} - -static int do_elf_reloc_fixups(void) -{ - Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start); - Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end); - - Elf32_Addr *offset_ptr_rom; - Elf32_Addr *offset_ptr_ram; - - /* The size of the region of u-boot that runs out of RAM. */ - uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; - - do { - /* Get the location from the relocation entry */ - offset_ptr_rom = (Elf32_Addr *)re_src->r_offset; - - /* Check that the location of the relocation is in .text */ - if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { - - /* Switch to the in-RAM version */ - offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + - gd->reloc_off); - - /* Check that the target points into .text */ - if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && - *offset_ptr_ram < - (CONFIG_SYS_TEXT_BASE + size)) { - *offset_ptr_ram += gd->reloc_off; - } - } - } while (re_src++ < re_end); - - return 0; -} - /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */ void board_init_f(ulong boot_flags) { @@ -270,17 +213,9 @@ void board_init_f_r(void) if (init_cache() != 0) hang(); - copy_uboot_to_ram(); - clear_bss(); - do_elf_reloc_fixups(); - - /* - * Transfer execution from Flash to RAM by calculating the address - * of the in-RAM copy of board_init_r() and calling it - */ - (board_init_r + gd->reloc_off)(gd, gd->relocaddr); + relocate_code(0, gd, 0); - /* NOTREACHED - board_init_r() does not return */ + /* NOTREACHED - relocate_code() does not return */ while (1) ; } diff --git a/arch/x86/lib/relocate.c b/arch/x86/lib/relocate.c new file mode 100644 index 0000000..badb5f8 --- /dev/null +++ b/arch/x86/lib/relocate.c @@ -0,0 +1,115 @@ +/* + * (C) Copyright 2008-2011 + * Graeme Russ, <graeme.russ@gmail.com> + * + * (C) Copyright 2002 + * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> + * + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <malloc.h> +#include <asm/u-boot-x86.h> +#include <elf.h> + +static int copy_uboot_to_ram(void); +static int clear_bss(void); +static int do_elf_reloc_fixups(void); + +static int copy_uboot_to_ram(void) +{ + size_t len = (size_t)&__data_end - (size_t)&__text_start; + + memcpy((void *)gd->relocaddr, (void *)&__text_start, len); + + return 0; +} + +static int clear_bss(void) +{ + ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; + size_t len = (size_t)&__bss_end - (size_t)&__bss_start; + + memset((void *)dst_addr, 0x00, len); + + return 0; +} + +static int do_elf_reloc_fixups(void) +{ + Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start); + Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end); + + Elf32_Addr *offset_ptr_rom; + Elf32_Addr *offset_ptr_ram; + + /* The size of the region of u-boot that runs out of RAM. */ + uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; + + do { + /* Get the location from the relocation entry */ + offset_ptr_rom = (Elf32_Addr *)re_src->r_offset; + + /* Check that the location of the relocation is in .text */ + if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) { + + /* Switch to the in-RAM version */ + offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom + + gd->reloc_off); + + /* Check that the target points into .text */ + if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE && + *offset_ptr_ram < + (CONFIG_SYS_TEXT_BASE + size)) { + *offset_ptr_ram += gd->reloc_off; + } + } + } while (re_src++ < re_end); + + return 0; +} + +void relocate_code(ulong dummy_1, gd_t *id, ulong dummy_2) +{ + /* + * Copy U-Boot into RAM, clear the BSS and perform relocation + * adjustments + */ + copy_uboot_to_ram(); + clear_bss(); + do_elf_reloc_fixups(); + + /* + * Transfer execution from Flash to RAM by calculating the address + * of the in-RAM copy of board_init_r() and calling it + */ + (board_init_r + gd->reloc_off)(gd, gd->relocaddr); + + /* NOTREACHED - board_init_r() does not return */ + while (1) + ; +}
Signed-off-by: Graeme Russ <graeme.russ@gmail.com> --- Changes for v2: - None arch/x86/lib/Makefile | 1 + arch/x86/lib/board.c | 69 +--------------------------- arch/x86/lib/relocate.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 118 insertions(+), 67 deletions(-) create mode 100644 arch/x86/lib/relocate.c -- 1.7.5.2.317.g391b14