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Some more work on mach-o TLV relocations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106062 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2010-06-15 22:59:05 +00:00
parent 38d5f0441c
commit c9ada472c8
1 changed files with 38 additions and 0 deletions
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38
lib/MC/MachObjectWriter.cpp
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@ -738,6 +738,38 @@ public:
Relocations[Fragment->getParent()].push_back(MRE); Relocations[Fragment->getParent()].push_back(MRE);
} }
void RecordTLVPRelocation(const MCAssembler &Asm,
const MCAsmLayout &Layout,
const MCFragment *Fragment,
const MCFixup &Fixup, MCValue Target,
uint64_t &FixedValue) {
assert(Target.getSymA()->getKind() == MCSymbolRefExpr::VK_TLVP &&
!Is64Bit &&
"Should only be called with a 32-bit TLVP relocation!");
// If this is a subtraction then we're pcrel.
unsigned Log2Size = getFixupKindLog2Size(Fixup.getKind());
uint32_t Value = Layout.getFragmentOffset(Fragment)+Fixup.getOffset();
unsigned IsPCRel = 0;
// Get the symbol data.
MCSymbolData *SD_A = &Asm.getSymbolData(Target.getSymA()->getSymbol());
unsigned Index = SD_A->getIndex();
if (Target.getSymB())
IsPCRel = 1;
// struct relocation_info (8 bytes)
MachRelocationEntry MRE;
MRE.Word0 = Value;
MRE.Word1 = ((Index << 0) |
(IsPCRel << 24) |
(Log2Size << 25) |
(1 << 27) | // Extern
(RIT_TLV << 28)); // Type
Relocations[Fragment->getParent()].push_back(MRE);
}
void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout, void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
const MCFragment *Fragment, const MCFixup &Fixup, const MCFragment *Fragment, const MCFixup &Fixup,
MCValue Target, uint64_t &FixedValue) { MCValue Target, uint64_t &FixedValue) {
@ -749,6 +781,12 @@ public:
unsigned IsPCRel = isFixupKindPCRel(Fixup.getKind()); unsigned IsPCRel = isFixupKindPCRel(Fixup.getKind());
unsigned Log2Size = getFixupKindLog2Size(Fixup.getKind()); unsigned Log2Size = getFixupKindLog2Size(Fixup.getKind());
// If this is a 32-bit TLVP reloc it's handled a bit differently.
if (Target.getSymA()->getKind() == MCSymbolRefExpr::VK_TLVP) {
RecordTLVPRelocation(Asm, Layout, Fragment, Fixup, Target, FixedValue);
return;
}
// If this is a difference or a defined symbol plus an offset, then we need // If this is a difference or a defined symbol plus an offset, then we need
// a scattered relocation entry. // a scattered relocation entry.
// Differences always require scattered relocations. // Differences always require scattered relocations.