lib/Target/X86/X86TargetObjectFile.cpp

   1 //===-- llvm/Target/X86/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/ADT/SmallString.h"
  12 #include "llvm/Support/Mangler.h"
  13 #include "llvm/MC/MCExpr.h"
  14 using namespace llvm;
  15
  16 const MCExpr *X8664_MachoTargetObjectFile::
  17 getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
  18                                  MachineModuleInfo *MMI,
  19                                  bool &IsIndirect, bool &IsPCRel) const {
  20
  21   // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
  22   // is an indirect pc-relative reference.
  23   IsIndirect = true;
  24   IsPCRel    = true;
  25
  26   SmallString<128> Name;
  27   Mang->getNameWithPrefix(Name, GV, false);
  28   Name += "@GOTPCREL";
  29   const MCExpr *Res =
  30     MCSymbolRefExpr::Create(Name.str(), getContext());
  31   const MCExpr *Four = MCConstantExpr::Create(4, getContext());
  32   return MCBinaryExpr::CreateAdd(Res, Four, getContext());
  33 }
  34