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Put each personality function in a section. This fixes the gnu ld warning:

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error in foo.o; no .eh_frame_hdr table will be created.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129635 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2011-04-16 03:51:21 +00:00
parent c5eecbc4ec
commit 30deafc84a
5 changed files with 57 additions and 8 deletions
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33
lib/CodeGen/TargetLoweringObjectFileImpl.cpp
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@ -23,6 +23,7 @@
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
@ -176,6 +177,38 @@ const MCSection *TargetLoweringObjectFileELF::getEHFrameSection() const {
SectionKind::getDataRel());
}
MCSymbol *
TargetLoweringObjectFileELF::getPersonalityPICSymbol(StringRef Name) const {
Twine FullName = StringRef("DW.ref.") + Name;
return getContext().GetOrCreateSymbol(FullName);
}
void TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer,
const TargetMachine &TM,
const MCSymbol *Sym) const {
MCSymbol *Label = getPersonalityPICSymbol(Sym->getName());
Streamer.EmitSymbolAttribute(Label, MCSA_Hidden);
Streamer.EmitSymbolAttribute(Label, MCSA_Weak);
Twine SectionName = StringRef(".data.") + Label->getName();
SmallString<64> NameData;
SectionName.toVector(NameData);
unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP;
const MCSection *Sec = getContext().getELFSection(NameData,
ELF::SHT_PROGBITS,
Flags,
SectionKind::getDataRel(),
0, Label->getName());
Streamer.SwitchSection(Sec);
Streamer.EmitValueToAlignment(8);
Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject);
const MCExpr *E = MCConstantExpr::Create(8, getContext());
Streamer.EmitELFSize(Label, E);
Streamer.EmitLabel(Label);
unsigned Size = TM.getTargetData()->getPointerSize();
Streamer.EmitSymbolValue(Sym, Size);
}
static SectionKind
getELFKindForNamedSection(StringRef Name, SectionKind K) {
// FIXME: Why is this here? Codegen is should not be in the business