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/MCAsmInfo.h"
  15 #include "llvm/MC/MCContext.h"
  16 #include "llvm/MC/MCExpr.h"
  17 #include "llvm/MC/MCSectionELF.h"
  18 #include "llvm/Support/Dwarf.h"
  19 #include "llvm/Support/ELF.h"
  20 #include "llvm/Target/TargetLowering.h"
  21 using namespace llvm;
  22 using namespace dwarf;
  23
  24 //===----------------------------------------------------------------------===//
  25 //                               ELF Target
  26 //===----------------------------------------------------------------------===//
  27
  28 void ARMElfTargetObjectFile::Initialize(MCContext &Ctx,
  29                                         const TargetMachine &TM) {
  30   bool isAAPCS_ABI = TM.getSubtarget<ARMSubtarget>().isAAPCS_ABI();
  31   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  32   InitializeELF(isAAPCS_ABI);
  33
  34   if (isAAPCS_ABI) {
  35     LSDASection = nullptr;
  36   }
  37
  38   AttributesSection =
  39     getContext().getELFSection(".ARM.attributes",
  40                                ELF::SHT_ARM_ATTRIBUTES,
  41                                0,
  42                                SectionKind::getMetadata());
  43 }
  44
  45 const MCExpr *ARMElfTargetObjectFile::getTTypeGlobalReference(
  46     const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
  47     const TargetMachine &TM, MachineModuleInfo *MMI,
  48     MCStreamer &Streamer) const {
  49   if (TM.getMCAsmInfo()->getExceptionHandlingType() != ExceptionHandling::ARM)
  50     return TargetLoweringObjectFileELF::getTTypeGlobalReference(
  51         GV, Encoding, Mang, TM, MMI, Streamer);
  52
  53   assert(Encoding == DW_EH_PE_absptr && "Can handle absptr encoding only");
  54
  55   return MCSymbolRefExpr::Create(TM.getSymbol(GV, Mang),
  56                                  MCSymbolRefExpr::VK_ARM_TARGET2, getContext());
  57 }
  58
  59 const MCExpr *ARMElfTargetObjectFile::
  60 getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
  61   return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_ARM_TLSLDO,
  62                                  getContext());
  63 }