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arm: implement ELF relocations

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ELF relocation tables generated with linker option -pie can
be used to fixup code and data in a single loop at relocation,
removing the need for manual fixups anywhere else in the code.

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
This commit is contained in:
Albert Aribaud 2010-10-11 13:13:28 +02:00 • committed by Wolfgang Denk
parent 89bca0ab69
commit 92d5ecba47
7 changed files with 156 additions and 290 deletions
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14
arch/arm/include/asm/u-boot-arm.h
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@ -30,18 +30,18 @@
#define _U_BOOT_ARM_H_ 1
/* for the following variables, see start.S */
extern ulong _bss_start; /* code + data end == BSS start */
extern ulong _bss_end; /* BSS end */
extern ulong _bss_start_ofs; /* BSS start relative to _start */
extern ulong _bss_end_ofs; /* BSS end relative to _start */
extern ulong IRQ_STACK_START; /* top of IRQ stack */
extern ulong FIQ_STACK_START; /* top of FIQ stack */
#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
extern ulong _armboot_start; /* code start */
extern ulong _armboot_start_ofs; /* code start */
#else
extern ulong _TEXT_BASE; /* code start */
extern ulong _datarel_start;
extern ulong _datarelrolocal_start;
extern ulong _datarellocal_start;
extern ulong _datarelro_start;
extern ulong _datarel_start_ofs;
extern ulong _datarelrolocal_start_ofs;
extern ulong _datarellocal_start_ofs;
extern ulong _datarelro_start_ofs;
extern ulong IRQ_STACK_START_IN; /* 8 bytes in IRQ stack */
#endif