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Attempt #2:

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Place the EH table in the __TEXT section on MachO. It saves space.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89270 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2009-11-18 23:18:46 +00:00
parent 60f34b9fb0
commit ec04458551
2 changed files with 30 additions and 8 deletions
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36
lib/CodeGen/AsmPrinter/DwarfException.cpp
View File

@ -727,7 +727,8 @@ void DwarfException::EmitExceptionTable() {
// somewhere. This predicate should be moved to a shared location that is
// in target-independent code.
//
if (LSDASection->getKind().isWriteable() ||
if ((LSDASection->getKind().isWriteable() &&
!LSDASection->getKind().isDataRel()) ||
Asm->TM.getRelocationModel() == Reloc::Static)
TTypeFormat = dwarf::DW_EH_PE_absptr;
else
@ -917,14 +918,35 @@ void DwarfException::EmitExceptionTable() {
}
// Emit the Catch TypeInfos.
for (std::vector<GlobalVariable *>::const_reverse_iterator
I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
const GlobalVariable *GV = *I;
PrintRelDirective();
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
unsigned Index = 1;
if (GV) {
O << Asm->Mang->getMangledName(GV);
for (std::vector<GlobalVariable *>::const_reverse_iterator
I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I, ++Index) {
const GlobalVariable *TI = *I;
if (TI) {
if (!LSDASection->getKind().isDataRel() &&
(TTypeFormat == dwarf::DW_EH_PE_absptr ||
TI->getLinkage() == GlobalValue::InternalLinkage)) {
// Print out the unadorned name of the type info.
PrintRelDirective();
O << Asm->Mang->getMangledName(TI);
} else {
bool IsTypeInfoIndirect = false, IsTypeInfoPCRel = false;
const MCExpr *TypeInfoRef =
TLOF.getSymbolForDwarfGlobalReference(TI, Asm->Mang, Asm->MMI,
IsTypeInfoIndirect,
IsTypeInfoPCRel);
if (!IsTypeInfoPCRel)
TypeInfoRef = CreateLabelDiff(TypeInfoRef, "typeinforef_addr", Index);
O << MAI->getData32bitsDirective();
TypeInfoRef->print(O, MAI);
}
} else {
PrintRelDirective();
O << "0x0";
}

2
lib/Target/TargetLoweringObjectFile.cpp
View File

@ -783,7 +783,7 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
}
// Exception Handling.
LSDASection = getMachOSection("__DATA", "__gcc_except_tab", 0,
LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
SectionKind::getDataRel());
EHFrameSection =
getMachOSection("__TEXT", "__eh_frame",