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"
21 using namespace llvm;
22 using namespace dwarf;
23
24 //===----------------------------------------------------------------------===//
25 // ELF Target
26 //===----------------------------------------------------------------------===//
27
Initialize(MCContext & Ctx,const TargetMachine & TM)28 void 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
getTTypeGlobalReference(const GlobalValue * GV,unsigned Encoding,Mangler & Mang,const TargetMachine & TM,MachineModuleInfo * MMI,MCStreamer & Streamer) const43 const 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
57 const MCExpr *ARMElfTargetObjectFile::
getDebugThreadLocalSymbol(const MCSymbol * Sym) const58 getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
59 return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_ARM_TLSLDO,
60 getContext());
61 }
62