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//===-- 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 "X86TargetObjectFile.h"
#include "X86Subtarget.h" // @LOCALMOD
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Target/Mangler.h"
using namespace llvm;
using namespace dwarf;
const MCExpr *X86_64MachoTargetObjectFile::
getTTypeGlobalReference(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 =
MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
const MCExpr *Four = MCConstantExpr::Create(4, getContext());
return MCBinaryExpr::CreateAdd(Res, Four, getContext());
}
return TargetLoweringObjectFileMachO::
getTTypeGlobalReference(GV, Mang, MMI, Encoding, Streamer);
}
MCSymbol *X86_64MachoTargetObjectFile::
getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI) const {
return Mang->getSymbol(GV);
}
void
X86LinuxTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
TargetLoweringObjectFileELF::Initialize(Ctx, TM);
InitializeELF(TM.Options.UseInitArray);
}
// @LOCALMOD-START
// NOTE: this was largely lifted from
// lib/Target/ARM/ARMTargetObjectFile.cpp
//
// The default is .ctors/.dtors while the arm backend uses
// .init_array/.fini_array
//
// Without this the linker defined symbols __fini_array_start and
// __fini_array_end do not have useful values. c.f.:
// http://code.google.com/p/nativeclient/issues/detail?id=805
void TargetLoweringObjectFileNaCl::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
TargetLoweringObjectFileELF::Initialize(Ctx, TM);
StaticCtorSection =
getContext().getELFSection(".init_array", ELF::SHT_INIT_ARRAY,
ELF::SHF_WRITE |
ELF::SHF_ALLOC,
SectionKind::getDataRel());
StaticDtorSection =
getContext().getELFSection(".fini_array", ELF::SHT_FINI_ARRAY,
ELF::SHF_WRITE |
ELF::SHF_ALLOC,
SectionKind::getDataRel());
}
// @LOCALMOD-END
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