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 "X86TargetMachine.h"
12 #include "llvm/ADT/StringExtras.h"
13 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCExpr.h"
16 #include "llvm/MC/MCSectionELF.h"
17 #include "llvm/MC/MCSectionMachO.h"
18 #include "llvm/Target/Mangler.h"
19 #include "llvm/Support/Dwarf.h"
20 #include "llvm/Support/ELF.h"
21 using namespace llvm;
22 using namespace dwarf;
23
24 const MCExpr *X86_64MachoTargetObjectFile::
getExprForDwarfGlobalReference(const GlobalValue * GV,Mangler * Mang,MachineModuleInfo * MMI,unsigned Encoding,MCStreamer & Streamer) const25 getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
26 MachineModuleInfo *MMI, unsigned Encoding,
27 MCStreamer &Streamer) const {
28
29 // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
30 // is an indirect pc-relative reference.
31 if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
32 const MCSymbol *Sym = Mang->getSymbol(GV);
33 const MCExpr *Res =
34 MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
35 const MCExpr *Four = MCConstantExpr::Create(4, getContext());
36 return MCBinaryExpr::CreateAdd(Res, Four, getContext());
37 }
38
39 return TargetLoweringObjectFileMachO::
40 getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
41 }
42
43 MCSymbol *X86_64MachoTargetObjectFile::
getCFIPersonalitySymbol(const GlobalValue * GV,Mangler * Mang,MachineModuleInfo * MMI) const44 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
45 MachineModuleInfo *MMI) const {
46 return Mang->getSymbol(GV);
47 }
48
49 void
Initialize(MCContext & Ctx,const TargetMachine & TM)50 X86LinuxTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
51 TargetLoweringObjectFileELF::Initialize(Ctx, TM);
52 InitializeELF(TM.Options.UseInitArray);
53 }
54