diff options
| author | Paul Gortmaker <paul.gortmaker@gmail.com> | 2009-05-07 16:18:40 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-05-07 17:21:01 +0100 |
| commit | ae51e609843f7d0aaeb1c2ad9f89d252a4899885 (patch) | |
| tree | af632106715c1c3db9c974fdecf6903e86eef1ed /arch/arm/include | |
| parent | a029b706d3b2d3a139bdeae84131d9a0f35f6478 (diff) | |
[ARM] 5507/1: support R_ARM_MOVW_ABS_NC and MOVT_ABS relocation types
From: Bruce Ashfield <bruce.ashfield@windriver.com>
To fully support the armv7-a instruction set/optimizations, support
for the R_ARM_MOVW_ABS_NC and R_ARM_MOVT_ABS relocation types is
required.
The MOVW and MOVT are both load-immediate instructions, MOVW loads 16
bits into the bottom half of a register, and MOVT loads 16 bits into the
top half of a register.
The relocation information for these instructions has a full 32 bit
value, plus an addend which is stored in the 16 immediate bits in the
instruction itself. The immediate bits in the instruction are not
contiguous (the register # splits it into a 4 bit and 12 bit value),
so the addend has to be extracted accordingly and added to the value.
The value is then split and put into the instruction; a MOVW uses the
bottom 16 bits of the value, and a MOVT uses the top 16 bits.
Signed-off-by: David Borman <david.borman@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/elf.h | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h index d7da19bcf92..c207504de84 100644 --- a/arch/arm/include/asm/elf.h +++ b/arch/arm/include/asm/elf.h @@ -45,13 +45,15 @@ typedef struct user_fp elf_fpregset_t; #define EF_ARM_HASENTRY 0x00000002 /* All */ #define EF_ARM_RELEXEC 0x00000001 /* All */ -#define R_ARM_NONE 0 -#define R_ARM_PC24 1 -#define R_ARM_ABS32 2 -#define R_ARM_CALL 28 -#define R_ARM_JUMP24 29 -#define R_ARM_V4BX 40 -#define R_ARM_PREL31 42 +#define R_ARM_NONE 0 +#define R_ARM_PC24 1 +#define R_ARM_ABS32 2 +#define R_ARM_CALL 28 +#define R_ARM_JUMP24 29 +#define R_ARM_V4BX 40 +#define R_ARM_PREL31 42 +#define R_ARM_MOVW_ABS_NC 43 +#define R_ARM_MOVT_ABS 44 /* * These are used to set parameters in the core dumps. |