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libs/libc/machine/arm/armv7-m/arch_elf.c: Add support for the R_ARM_THM_JUMP11 relocation type. This relocation type may be generated when LTO optimization is enabled.

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This commit is contained in:
anchao 2019-01-26 11:52:57 -06:00 committed by Gregory Nutt
parent c43e4673ab
commit 98add65c14
1 changed files with 35 additions and 0 deletions
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35
libs/libc/machine/arm/armv7-m/arch_elf.c
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@ -450,6 +450,41 @@ int up_relocate(FAR const Elf32_Rel *rel, FAR const Elf32_Sym *sym,
} }
break; break;
case R_ARM_THM_JUMP11:
{
offset = (uint32_t)(*(uint16_t *)addr & 0x7ff) << 1;
if (offset & 0x0800)
{
offset -= 0x1000;
}
offset += sym->st_value - addr;
if (ELF32_ST_TYPE(sym->st_info) == STT_FUNC && (offset & 1) == 0)
{
berr("ERROR: JUMP11 [%d] requires odd offset, offset=%08lx\n",
ELF32_R_TYPE(rel->r_info), offset);
return -EINVAL;
}
/* Check the range of the offset */
if (offset < (int32_t)0xfffff800 || offset >= (int32_t)0x0800)
{
berr("ERROR: JUMP11 [%d] relocation out of range, branch taget=%08lx\n",
ELF32_R_TYPE(rel->r_info), offset);
return -EINVAL;
}
offset >>= 1;
*(uint16_t *)addr &= 0xf800;
*(uint16_t *)addr |= offset & 0x7ff;
}
break;
default: default:
berr("ERROR: Unsupported relocation: %d\n", ELF32_R_TYPE(rel->r_info)); berr("ERROR: Unsupported relocation: %d\n", ELF32_R_TYPE(rel->r_info));
return -EINVAL; return -EINVAL;