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      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 
     17 using namespace llvm;
     18 using namespace dwarf;
     19 
     20 const MCExpr *X86_64MachoTargetObjectFile::
     21 getTTypeGlobalReference(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 = Mang->getSymbol(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 
     39 MCSymbol *X86_64MachoTargetObjectFile::
     40 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
     41                         MachineModuleInfo *MMI) const {
     42   return Mang->getSymbol(GV);
     43 }
     44 
     45 void
     46 X86LinuxTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
     47   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
     48   InitializeELF(TM.Options.UseInitArray);
     49 }
     50 
     51 const MCExpr *
     52 X86LinuxTargetObjectFile::getDebugThreadLocalSymbol(
     53     const MCSymbol *Sym) const {
     54   return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
     55 }
     56