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