6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-24 23:28:41 +00:00
Code Issues Projects Releases Wiki Activity

Preliminary patch to improve dwarf EH generation - Hooks to return Personality / FDE / LSDA / TType encoding depending on target / options (e.g. code model / relocation model) - MCIzation of Dwarf EH printer to use encoding information - Stub generation for ELF target (needed for indirect references) - Some other small changes here and there

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96285 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov
2010-02-15 22:35:59 +00:00
parent 6a7cb63f6f
commit 9184b25fa5
20 changed files with 470 additions and 297 deletions
Download Patch File Download Diff File Expand all files Collapse all files

184
lib/Target/X86/X86TargetObjectFile.cpp
View File

@@ -7,61 +7,177 @@
//
//===----------------------------------------------------------------------===//
#include "X86TargetObjectFile.h"
#include "X86MCTargetExpr.h"
#include "X86TargetObjectFile.h"
#include "X86TargetMachine.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Target/Mangler.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Dwarf.h"
using namespace llvm;
using namespace dwarf;
const MCExpr *X8632_MachoTargetObjectFile::
getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI,
bool &IsIndirect, bool &IsPCRel) const {
MachineModuleInfo *MMI, unsigned Encoding) const {
// The mach-o version of this method defaults to returning a stub reference.
IsIndirect = true;
IsPCRel = false;
MachineModuleInfoMachO &MachOMMI =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
// FIXME: Use GetSymbolWithGlobalValueBase.
SmallString<128> Name;
Mang->getNameWithPrefix(Name, GV, true);
Name += "$non_lazy_ptr";
// Add information about the stub reference to MachOMMI so that the stub gets
// emitted by the asmprinter.
MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
MCSymbol *&StubSym = MachOMMI.getGVStubEntry(Sym);
if (StubSym == 0) {
Name.clear();
Mang->getNameWithPrefix(Name, GV, false);
StubSym = getContext().GetOrCreateSymbol(Name.str());
if (Encoding & DW_EH_PE_indirect) {
MachineModuleInfoMachO &MachOMMI =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
SmallString<128> Name;
Mang->getNameWithPrefix(Name, GV, true);
Name += "$non_lazy_ptr";
// Add information about the stub reference to MachOMMI so that the stub
// gets emitted by the asmprinter.
MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
MCSymbol *&StubSym = MachOMMI.getGVStubEntry(Sym);
if (StubSym == 0) {
Name.clear();
Mang->getNameWithPrefix(Name, GV, false);
StubSym = getContext().GetOrCreateSymbol(Name.str());
}
return TargetLoweringObjectFile::
getSymbolForDwarfReference(Sym, MMI,
Encoding & ~dwarf::DW_EH_PE_indirect);
}
return MCSymbolRefExpr::Create(Sym, getContext());
return TargetLoweringObjectFileMachO::
getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
}
const MCExpr *X8664_MachoTargetObjectFile::
getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI,
bool &IsIndirect, bool &IsPCRel) const {
MachineModuleInfo *MMI, unsigned Encoding) const {
// On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
// is an indirect pc-relative reference.
IsIndirect = true;
IsPCRel = true;
// FIXME: Use GetSymbolWithGlobalValueBase.
SmallString<128> Name;
Mang->getNameWithPrefix(Name, GV, false);
if ((Encoding & DW_EH_PE_indirect) &&
(Encoding & DW_EH_PE_pcrel)) {
SmallString<128> Name;
Mang->getNameWithPrefix(Name, GV, false);
const MCSymbol *Sym = getContext().CreateSymbol(Name);
const MCExpr *Res =
X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext());
const MCExpr *Four = MCConstantExpr::Create(4, getContext());
return MCBinaryExpr::CreateAdd(Res, Four, getContext());
}
return TargetLoweringObjectFileMachO::
getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
}
unsigned X8632_ELFTargetObjectFile::getPersonalityEncoding() const {
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
else
return DW_EH_PE_absptr;
}
unsigned X8632_ELFTargetObjectFile::getLSDAEncoding() const {
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
else
return DW_EH_PE_absptr;
}
unsigned X8632_ELFTargetObjectFile::getFDEEncoding() const {
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
else
return DW_EH_PE_absptr;
}
unsigned X8632_ELFTargetObjectFile::getTTypeEncoding() const {
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
else
return DW_EH_PE_absptr;
}
unsigned X8664_ELFTargetObjectFile::getPersonalityEncoding() const {
CodeModel::Model Model = TM.getCodeModel();
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
Model == CodeModel::Medium ?
DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
if (Model == CodeModel::Small || Model == CodeModel::Medium)
return DW_EH_PE_udata4;
return DW_EH_PE_absptr;
}
unsigned X8664_ELFTargetObjectFile::getLSDAEncoding() const {
CodeModel::Model Model = TM.getCodeModel();
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_pcrel | (Model == CodeModel::Small ?
DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
if (Model == CodeModel::Small)
return DW_EH_PE_udata4;
return DW_EH_PE_absptr;
}
unsigned X8664_ELFTargetObjectFile::getFDEEncoding() const {
CodeModel::Model Model = TM.getCodeModel();
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_pcrel | (Model == CodeModel::Small ||
Model == CodeModel::Medium ?
DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
if (Model == CodeModel::Small || Model == CodeModel::Medium)
return DW_EH_PE_udata4;
return DW_EH_PE_absptr;
}
unsigned X8664_ELFTargetObjectFile::getTTypeEncoding() const {
CodeModel::Model Model = TM.getCodeModel();
if (TM.getRelocationModel() == Reloc::PIC_)
return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
Model == CodeModel::Medium ?
DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
if (Model == CodeModel::Small)
return DW_EH_PE_udata4;
return DW_EH_PE_absptr;
}
unsigned X8632_MachoTargetObjectFile::getPersonalityEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8632_MachoTargetObjectFile::getLSDAEncoding() const {
return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8632_MachoTargetObjectFile::getFDEEncoding() const {
return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8632_MachoTargetObjectFile::getTTypeEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8664_MachoTargetObjectFile::getPersonalityEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8664_MachoTargetObjectFile::getLSDAEncoding() const {
return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8664_MachoTargetObjectFile::getFDEEncoding() const {
return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
unsigned X8664_MachoTargetObjectFile::getTTypeEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}