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Introduce adjustFixupOffset that adjusts the fixup offset of a relocation. 

This is meant to be overriden by backends. Implement an override on PowerPC
which adjusts the offset by 2 for ha16/lo16 relocation kinds. This removes
a commented out hack and enables hello world to be compiled on PowerPC.

llvm-svn: 136905
This commit is contained in:
Roman Divacky 2011-08-04 19:08:19 +00:00
parent fddf530c5d
commit dfbecd1eb7
2 changed files with 16 additions and 12 deletions
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26
llvm/lib/MC/ELFObjectWriter.cpp
View File

@ -447,18 +447,8 @@ void ELFObjectWriter::RecordRelocation(const MCAssembler &Asm,
uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) +
Fixup.getOffset();
#if 0
// TODO: This is necessary on PPC32 but it must be implemented
// in a different way.
switch ((unsigned)Fixup.getKind()) {
case PPC::fixup_ppc_ha16:
case PPC::fixup_ppc_lo16:
RelocOffset += 2;
break;
default:
break;
}
#endif
adjustFixupOffset(Fixup, RelocOffset);
if (!hasRelocationAddend())
Addend = 0;
@ -1583,6 +1573,18 @@ unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
return Type;
}
void
PPCELFObjectWriter::adjustFixupOffset(const MCFixup &Fixup, uint64_t &RelocOffset) {
switch ((unsigned)Fixup.getKind()) {
case PPC::fixup_ppc_ha16:
case PPC::fixup_ppc_lo16:
RelocOffset += 2;
break;
default:
break;
}
}
//===- MBlazeELFObjectWriter -------------------------------------------===//
MBlazeELFObjectWriter::MBlazeELFObjectWriter(MCELFObjectTargetWriter *MOTW,

2
llvm/lib/MC/ELFObjectWriter.h
View File

@ -347,6 +347,7 @@ class ELFObjectWriter : public MCObjectWriter {
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsPCRel, bool IsRelocWithSymbol,
int64_t Addend) = 0;
virtual void adjustFixupOffset(const MCFixup &Fixup, uint64_t &RelocOffset) { }
};
//===- X86ELFObjectWriter -------------------------------------------===//
@ -408,6 +409,7 @@ class ELFObjectWriter : public MCObjectWriter {
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsPCRel, bool IsRelocWithSymbol,
int64_t Addend);
virtual void adjustFixupOffset(const MCFixup &Fixup, uint64_t &RelocOffset);
};
//===- MBlazeELFObjectWriter -------------------------------------------===//