X86TargetObjectFile.cpp revision 263508 
1//===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "X86TargetObjectFile.h"
11#include "llvm/MC/MCContext.h"
12#include "llvm/MC/MCExpr.h"
13#include "llvm/MC/MCSectionELF.h"
14#include "llvm/Support/Dwarf.h"
15#include "llvm/Target/Mangler.h"
16
17using namespace llvm;
18using namespace dwarf;
19
20const MCExpr *X86_64MachoTargetObjectFile::
21getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
22                        MachineModuleInfo *MMI, unsigned Encoding,
23                        MCStreamer &Streamer) const {
24
25  // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
26  // is an indirect pc-relative reference.
27  if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
28    const MCSymbol *Sym = getSymbol(*Mang, GV);
29    const MCExpr *Res =
30      MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
31    const MCExpr *Four = MCConstantExpr::Create(4, getContext());
32    return MCBinaryExpr::CreateAdd(Res, Four, getContext());
33  }
34
35  return TargetLoweringObjectFileMachO::
36    getTTypeGlobalReference(GV, Mang, MMI, Encoding, Streamer);
37}
38
39MCSymbol *X86_64MachoTargetObjectFile::
40getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
41                        MachineModuleInfo *MMI) const {
42  return getSymbol(*Mang, GV);
43}
44
45void
46X86LinuxTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
47  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
48  InitializeELF(TM.Options.UseInitArray);
49}
50
51const MCExpr *
52X86LinuxTargetObjectFile::getDebugThreadLocalSymbol(
53    const MCSymbol *Sym) const {
54  return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
55}
56