lib/Target/ARM/ARMTargetObjectFile.cpp

   1 //===-- llvm/Target/ARMTargetObjectFile.cpp - ARM Object Info Impl --------===//
   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 "ARMTargetObjectFile.h"
  11 #include "ARMSubtarget.h"
  12 #include "llvm/ADT/StringExtras.h"
  13 #include "llvm/IR/Mangler.h"
  14 #include "llvm/MC/MCContext.h"
  15 #include "llvm/MC/MCExpr.h"
  16 #include "llvm/MC/MCSectionELF.h"
  17 #include "llvm/Support/Dwarf.h"
  18 #include "llvm/Support/ELF.h"
  19 #include "llvm/Target/TargetMachine.h"
  20 using namespace llvm;
  21 using namespace dwarf;
  22
  23 //===----------------------------------------------------------------------===//
  24 //                               ELF Target
  25 //===----------------------------------------------------------------------===//
  26
  27 void ARMElfTargetObjectFile::Initialize(MCContext &Ctx,
  28                                         const TargetMachine &TM) {
  29   bool isAAPCS_ABI = TM.getSubtarget<ARMSubtarget>().isAAPCS_ABI();
  30   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  31   InitializeELF(isAAPCS_ABI);
  32
  33   if (isAAPCS_ABI) {
  34     LSDASection = NULL;
  35   }
  36
  37   AttributesSection =
  38     getContext().getELFSection(".ARM.attributes",
  39                                ELF::SHT_ARM_ATTRIBUTES,
  40                                0,
  41                                SectionKind::getMetadata());
  42 }
  43
  44 const MCExpr *ARMElfTargetObjectFile::
  45 getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
  46                         MachineModuleInfo *MMI, unsigned Encoding,
  47                         MCStreamer &Streamer) const {
  48   assert(Encoding == DW_EH_PE_absptr && "Can handle absptr encoding only");
  49
  50   return MCSymbolRefExpr::Create(getSymbol(*Mang, GV),
  51                                  MCSymbolRefExpr::VK_ARM_TARGET2,
  52                                  getContext());
  53 }
  54
  55 const MCExpr *ARMElfTargetObjectFile::
  56 getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
  57   return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_ARM_TLSLDO,
  58                                  getContext());
  59 }