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
Initialize(MCContext & Ctx,const TargetMachine & TM)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
getTTypeGlobalReference(const GlobalValue * GV,unsigned Encoding,Mangler & Mang,const TargetMachine & TM,MachineModuleInfo * MMI,MCStreamer & Streamer) const45 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::
getDebugThreadLocalSymbol(const MCSymbol * Sym) const60 getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
61 return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_ARM_TLSLDO,
62 getContext());
63 }
64