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Completely rewrite ELFObjectWriter::RecordRelocation.

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I started trying to fix a small issue, but this code has seen a small fix too
many.

The old code was fairly convoluted. Some of the issues it had:

* It failed to check if a symbol difference was in the some section when
  converting a relocation to pcrel.
* It failed to check if the relocation was already pcrel.
* The pcrel value computation was wrong in some cases (relocation-pc.s)
* It was missing quiet a few cases where it should not convert symbol
  relocations to section relocations, leaving the backends to patch it up.
* It would not propagate the fact that it had changed a relocation to pcrel,
  requiring a quiet nasty work around in ARM.
* It was missing comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205076 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-03-29 06:26:49 +00:00
parent 44b2b9dc1a
commit 224dbf4aec
34 changed files with 353 additions and 697 deletions
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23
lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
View File

@ -30,12 +30,6 @@ namespace {
protected:
unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsPCRel) const override;
virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
const MCValue &Target,
const MCFragment &F,
const MCFixup &Fixup,
bool IsPCRel) const;
};
}
@ -110,23 +104,6 @@ unsigned SparcELFObjectWriter::GetRelocType(const MCValue &Target,
return ELF::R_SPARC_NONE;
}
const MCSymbol *SparcELFObjectWriter::ExplicitRelSym(const MCAssembler &Asm,
const MCValue &Target,
const MCFragment &F,
const MCFixup &Fixup,
bool IsPCRel) const {
if (!Target.getSymA())
return NULL;
switch((unsigned)Fixup.getKind()) {
default: break;
case Sparc::fixup_sparc_got22:
case Sparc::fixup_sparc_got10:
return &Target.getSymA()->getSymbol().AliasedSymbol();
}
return NULL;
}
MCObjectWriter *llvm::createSparcELFObjectWriter(raw_ostream &OS,
bool Is64Bit,
uint8_t OSABI) {