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[Mips] Split reloc26 function into two parts - for processing local and 

external relocations.

llvm-svn: 202289
This commit is contained in:
Simon Atanasyan 2014-02-26 19:17:20 +00:00
parent 2043ee167c
commit 46ff3ce2bd
1 changed files with 11 additions and 7 deletions
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18
lld/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp
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@ -46,12 +46,16 @@ void reloc32(uint8_t *location, uint64_t P, uint64_t S, int64_t A) {
/// \brief R_MIPS_26
/// local : ((A | ((P + 4) & 0x3F000000)) + S) >> 2
void reloc26loc(uint8_t *location, uint64_t P, uint64_t S, int32_t A) {
uint32_t result = ((A << 2) | ((P + 4) & 0x3f000000)) + S;
applyReloc(location, result >> 2, 0x03ffffff);
}
/// \brief LLD_R_MIPS_GLOBAL_26
/// external: (sign–extend(A) + S) >> 2
void reloc26(uint8_t *location, uint64_t P, uint64_t S, bool isLocal) {
int32_t A = (*(uint32_t*)location & 0x03FFFFFFU) << 2;
uint32_t result = isLocal ? (A | ((P + 4) & 0x3F000000)) : signExtend<28>(A);
result = (result + S) >> 2;
applyReloc(location, result, 0x03ffffff);
void reloc26ext(uint8_t *location, uint64_t S, int32_t A) {
uint32_t result = signExtend<28>(A << 2) + S;
applyReloc(location, result >> 2, 0x03ffffff);
}
/// \brief R_MIPS_HI16
@ -183,7 +187,7 @@ error_code MipsTargetRelocationHandler::applyRelocation(
reloc32(location, relocVAddress, targetVAddress, ref.addend());
break;
case R_MIPS_26:
reloc26(location, relocVAddress, targetVAddress, true);
reloc26loc(location, relocVAddress, targetVAddress, ref.addend());
break;
case R_MIPS_HI16:
savePairedRelocation(atom, ref);
@ -212,7 +216,7 @@ error_code MipsTargetRelocationHandler::applyRelocation(
relocGOT16(location, relocVAddress, targetVAddress, ref.addend(), gpAddr);
break;
case LLD_R_MIPS_GLOBAL_26:
reloc26(location, relocVAddress, targetVAddress, false);
reloc26ext(location, targetVAddress, ref.addend());
break;
case LLD_R_MIPS_HI16:
relocLldHi16(location, targetVAddress);