}
MCSymbol *
-TargetLoweringObjectFileELF::getPersonalityPICSymbol(StringRef Name) const {
- Twine FullName = StringRef("DW.ref.") + Name;
- return getContext().GetOrCreateSymbol(FullName);
+TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV,
+ Mangler *Mang,
+ MachineModuleInfo *MMI) const {
+ unsigned Encoding = getPersonalityEncoding();
+ switch (Encoding & 0x70) {
+ default:
+ report_fatal_error("We do not support this DWARF encoding yet!");
+ case dwarf::DW_EH_PE_absptr:
+ return Mang->getSymbol(GV);
+ break;
+ case dwarf::DW_EH_PE_pcrel: {
+ Twine FullName = StringRef("DW.ref.") + Mang->getSymbol(GV)->getName();
+ return getContext().GetOrCreateSymbol(FullName);
+ break;
+ }
+ }
}
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);
+ const MCSymbol *Sym) const {
+ Twine FullName = StringRef("DW.ref.") + Sym->getName();
+ MCSymbol *Label = getContext().GetOrCreateSymbol(FullName);
+ 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
- // of figuring section flags. If the user wrote section(".eh_frame"),
- // we should just pass that to MC which will defer to the assembly
- // or use its default if producing an object file.
+ // N.B.: The defaults used in here are no the same ones used in MC.
+ // We follow gcc, MC follows gas. For example, given ".section .eh_frame",
+ // both gas and MC will produce a section with no flags. Given
+ // section(".eh_frame") gcc will produce
+ // .section .eh_frame,"a",@progbits
if (Name.empty() || Name[0] != '.') return K;
// Some lame default implementation based on some magic section names.
return SectionKind::getThreadBSS();
if (Name == ".eh_frame")
- return SectionKind::getDataRel();
+ return SectionKind::getReadOnlyWithRel();
return K;
}
if (K.isText())
Flags |= ELF::SHF_EXECINSTR;
- if (K.isWriteable())
+ if (K.isWriteable() && !K.isReadOnlyWithRel())
Flags |= ELF::SHF_WRITE;
if (K.isThreadLocal())
}
return TargetLoweringObjectFile::
- getExprForDwarfReference(SSym, Mang, MMI,
- Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
+ getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
return TargetLoweringObjectFile::
void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
- // _foo.eh symbols are currently always exported so that the linker knows
- // about them. This is not necessary on 10.6 and later, but it
- // doesn't hurt anything.
- // FIXME: I need to get this from Triple.
- IsFunctionEHSymbolGlobal = true;
IsFunctionEHFrameSymbolPrivate = false;
SupportsWeakOmittedEHFrame = false;
}
return TargetLoweringObjectFile::
- getExprForDwarfReference(SSym, Mang, MMI,
- Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
+ getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
return TargetLoweringObjectFile::
getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
}
+MCSymbol *TargetLoweringObjectFileMachO::
+getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI) const {
+ // The mach-o version of this method defaults to returning a stub reference.
+ MachineModuleInfoMachO &MachOMMI =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>();
+
+ SmallString<128> Name;
+ Mang->getNameWithPrefix(Name, GV, true);
+ Name += "$non_lazy_ptr";
+
+ // Add information about the stub reference to MachOMMI so that the stub
+ // gets emitted by the asmprinter.
+ MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str());
+ MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym);
+ if (StubSym.getPointer() == 0) {
+ MCSymbol *Sym = Mang->getSymbol(GV);
+ StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
+ }
+
+ return SSym;
+}
+
unsigned TargetLoweringObjectFileMachO::getPersonalityEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
return DW_EH_PE_pcrel;
}
-unsigned TargetLoweringObjectFileMachO::getFDEEncoding() const {
+unsigned TargetLoweringObjectFileMachO::getFDEEncoding(bool CFI) const {
return DW_EH_PE_pcrel;
}
getContext().getCOFFSection(".drectve",
COFF::IMAGE_SCN_LNK_INFO,
SectionKind::getMetadata());
+
+ PDataSection =
+ getContext().getCOFFSection(".pdata",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+
+ XDataSection =
+ getContext().getCOFFSection(".xdata",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
}
const MCSection *TargetLoweringObjectFileCOFF::getEHFrameSection() const {
SectionKind::getDataRel());
}
+const MCSection *TargetLoweringObjectFileCOFF::getWin64EHFuncTableSection(
+ StringRef suffix) const {
+ if (suffix == "")
+ return PDataSection;
+ return getContext().getCOFFSection((".pdata"+suffix).str(),
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+}
+
+const MCSection *TargetLoweringObjectFileCOFF::getWin64EHTableSection(
+ StringRef suffix) const {
+ if (suffix == "")
+ return XDataSection;
+ return getContext().getCOFFSection((".xdata"+suffix).str(),
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+}
+
static unsigned
getCOFFSectionFlags(SectionKind K) {
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