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 "X86MCTargetExpr.h" 12 #include "llvm/CodeGen/MachineModuleInfoImpls.h" 13 #include "llvm/MC/MCContext.h" 14 #include "llvm/Target/Mangler.h" 15 #include "llvm/ADT/SmallString.h" 16 using namespace llvm; 17 18 const MCExpr *X8632_MachoTargetObjectFile:: 19 getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, 20 MachineModuleInfo *MMI, 21 bool &IsIndirect, bool &IsPCRel) const { 22 // The mach-o version of this method defaults to returning a stub reference. 23 IsIndirect = true; 24 IsPCRel = false; 25 26 27 MachineModuleInfoMachO &MachOMMI = 28 MMI->getObjFileInfo<MachineModuleInfoMachO>(); 29 30 // FIXME: Use GetSymbolWithGlobalValueBase. 31 SmallString<128> Name; 32 Mang->getNameWithPrefix(Name, GV, true); 33 Name += "$non_lazy_ptr"; 34 35 // Add information about the stub reference to MachOMMI so that the stub gets 36 // emitted by the asmprinter. 37 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str()); 38 MCSymbol *&StubSym = MachOMMI.getGVStubEntry(Sym); 39 if (StubSym == 0) { 40 Name.clear(); 41 Mang->getNameWithPrefix(Name, GV, false); 42 StubSym = getContext().GetOrCreateSymbol(Name.str()); 43 } 44 45 return MCSymbolRefExpr::Create(Sym, getContext()); 46 } 47 48 const MCExpr *X8664_MachoTargetObjectFile:: 49 getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, 50 MachineModuleInfo *MMI, 51 bool &IsIndirect, bool &IsPCRel) const { 52 53 // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which 54 // is an indirect pc-relative reference. 55 IsIndirect = true; 56 IsPCRel = true; 57 58 SmallString<128> Name; 59 Mang->getNameWithPrefix(Name, GV, false); 60 const MCSymbol *Sym = getContext().CreateSymbol(Name); 61 const MCExpr *Res = 62 X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext()); 63 const MCExpr *Four = MCConstantExpr::Create(4, getContext()); 64 return MCBinaryExpr::CreateAdd(Res, Four, getContext()); 65 } 66 67