src/llvm/lib/Target/AArch64/AArch64TargetObjectFile.cpp

   1 //===-- AArch64TargetObjectFile.cpp - AArch64 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 "AArch64TargetObjectFile.h"
  11 #include "AArch64TargetMachine.h"
  12 #include "llvm/IR/Mangler.h"
  13 #include "llvm/MC/MCContext.h"
  14 #include "llvm/MC/MCExpr.h"
  15 #include "llvm/MC/MCStreamer.h"
  16 #include "llvm/Support/Dwarf.h"
  17 using namespace llvm;
  18 using namespace dwarf;
  19
  20 void AArch64_ELFTargetObjectFile::Initialize(MCContext &Ctx,
  21                                              const TargetMachine &TM) {
  22   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  23   InitializeELF(TM.Options.UseInitArray);
  24 }
  25
  26 const MCExpr *AArch64_MachoTargetObjectFile::getTTypeGlobalReference(
  27     const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
  28     const TargetMachine &TM, MachineModuleInfo *MMI,
  29     MCStreamer &Streamer) const {
  30   // On Darwin, we can reference dwarf symbols with foo@GOT-., which
  31   // is an indirect pc-relative reference. The default implementation
  32   // won't reference using the GOT, so we need this target-specific
  33   // version.
  34   if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
  35     const MCSymbol *Sym = TM.getSymbol(GV, Mang);
  36     const MCExpr *Res =
  37         MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOT, getContext());
  38     MCSymbol *PCSym = getContext().CreateTempSymbol();
  39     Streamer.EmitLabel(PCSym);
  40     const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, getContext());
  41     return MCBinaryExpr::CreateSub(Res, PC, getContext());
  42   }
  43
  44   return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
  45       GV, Encoding, Mang, TM, MMI, Streamer);
  46 }
  47
  48 MCSymbol *AArch64_MachoTargetObjectFile::getCFIPersonalitySymbol(
  49     const GlobalValue *GV, Mangler &Mang, const TargetMachine &TM,
  50     MachineModuleInfo *MMI) const {
  51   return TM.getSymbol(GV, Mang);
  52 }