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//===-- llvm/Target/X86/X86TargetObjectFile.cpp - X86 Object Info ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "X86MCTargetExpr.h"
#include "X86TargetObjectFile.h"
#include "X86TargetMachine.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/Target/Mangler.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Dwarf.h"
using namespace llvm;
using namespace dwarf;
void X86_MachoTargetObjectFile::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
TargetLoweringObjectFileMachO::Initialize(Ctx, TM);
// Exception Handling.
LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
SectionKind::getReadOnlyWithRel());
}
unsigned X86_MachoTargetObjectFile::getTTypeEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
const MCExpr *X8664_MachoTargetObjectFile::
getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI, unsigned Encoding,
MCStreamer &Streamer) const {
// On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
// is an indirect pc-relative reference.
if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
const MCSymbol *Sym = Mang->getSymbol(GV);
const MCExpr *Res =
X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext());
const MCExpr *Four = MCConstantExpr::Create(4, getContext());
return MCBinaryExpr::CreateAdd(Res, Four, getContext());
}
return TargetLoweringObjectFileMachO::
getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
}
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;
}
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