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MC-COFF: Handle relaxation in COFF better. Fixes PR8321.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116013 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2010-10-07 23:55:40 +00:00
parent fc7744b12d
commit b225adee29
1 changed files with 29 additions and 1 deletions
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30
lib/MC/WinCOFFObjectWriter.cpp
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@ -639,6 +639,11 @@ void WinCOFFObjectWriter::RecordRelocation(const MCAssembler &Asm,
COFFSymbol *coff_symbol = SymbolMap[&A_SD];
if (Target.getSymB()) {
if (&Target.getSymA()->getSymbol().getSection()
!= &Target.getSymB()->getSymbol().getSection()) {
llvm_unreachable("Symbol relative relocations are only allowed between "
"symbols in the same section");
}
const MCSymbol *B = &Target.getSymB()->getSymbol();
MCSymbolData &B_SD = Asm.getSymbolData(*B);
@ -701,7 +706,30 @@ bool WinCOFFObjectWriter::IsFixupFullyResolved(const MCAssembler &Asm,
const MCValue Target,
bool IsPCRel,
const MCFragment *DF) const {
return false;
// If this is a PCrel relocation, find the section this fixup value is
// relative to.
const MCSection *BaseSection = 0;
if (IsPCRel) {
BaseSection = &DF->getParent()->getSection();
assert(BaseSection);
}
const MCSection *SectionA = 0;
const MCSymbol *SymbolA = 0;
if (const MCSymbolRefExpr *A = Target.getSymA()) {
SymbolA = &A->getSymbol();
SectionA = &SymbolA->getSection();
}
const MCSection *SectionB = 0;
if (const MCSymbolRefExpr *B = Target.getSymB()) {
SectionB = &B->getSymbol().getSection();
}
if (!BaseSection)
return SectionA == SectionB;
return !SectionB && BaseSection == SectionA;
}
void WinCOFFObjectWriter::WriteObject(MCAssembler &Asm,