1 //===-- llvm/Target/X86/X86TargetObjectFile.cpp - X86 Object Info ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "X86MCTargetExpr.h"
11 #include "X86TargetObjectFile.h"
12 #include "X86TargetMachine.h"
13 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/Target/Mangler.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/Support/Dwarf.h"
19 using namespace dwarf;
21 const MCExpr *X8632_MachoTargetObjectFile::
22 getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
23 MachineModuleInfo *MMI, unsigned Encoding) const {
24 // The mach-o version of this method defaults to returning a stub reference.
26 if (Encoding & DW_EH_PE_indirect) {
27 MachineModuleInfoMachO &MachOMMI =
28 MMI->getObjFileInfo<MachineModuleInfoMachO>();
30 SmallString<128> Name;
31 Mang->getNameWithPrefix(Name, GV, true);
32 Name += "$non_lazy_ptr";
34 // Add information about the stub reference to MachOMMI so that the stub
35 // gets emitted by the asmprinter.
36 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
37 MCSymbol *&StubSym = MachOMMI.getGVStubEntry(Sym);
40 Mang->getNameWithPrefix(Name, GV, false);
41 StubSym = getContext().GetOrCreateSymbol(Name.str());
44 return TargetLoweringObjectFile::
45 getSymbolForDwarfReference(Sym, MMI,
46 Encoding & ~dwarf::DW_EH_PE_indirect);
49 return TargetLoweringObjectFileMachO::
50 getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
53 const MCExpr *X8664_MachoTargetObjectFile::
54 getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
55 MachineModuleInfo *MMI, unsigned Encoding) const {
57 // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
58 // is an indirect pc-relative reference.
59 if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
60 SmallString<128> Name;
61 Mang->getNameWithPrefix(Name, GV, false);
62 const MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
64 X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext());
65 const MCExpr *Four = MCConstantExpr::Create(4, getContext());
66 return MCBinaryExpr::CreateAdd(Res, Four, getContext());
69 return TargetLoweringObjectFileMachO::
70 getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
73 unsigned X8632_ELFTargetObjectFile::getPersonalityEncoding() const {
74 if (TM.getRelocationModel() == Reloc::PIC_)
75 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
77 return DW_EH_PE_absptr;
80 unsigned X8632_ELFTargetObjectFile::getLSDAEncoding() const {
81 if (TM.getRelocationModel() == Reloc::PIC_)
82 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
84 return DW_EH_PE_absptr;
87 unsigned X8632_ELFTargetObjectFile::getFDEEncoding() const {
88 if (TM.getRelocationModel() == Reloc::PIC_)
89 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
91 return DW_EH_PE_absptr;
94 unsigned X8632_ELFTargetObjectFile::getTTypeEncoding() const {
95 if (TM.getRelocationModel() == Reloc::PIC_)
96 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
98 return DW_EH_PE_absptr;
101 unsigned X8664_ELFTargetObjectFile::getPersonalityEncoding() const {
102 CodeModel::Model Model = TM.getCodeModel();
103 if (TM.getRelocationModel() == Reloc::PIC_)
104 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
105 Model == CodeModel::Medium ?
106 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
108 if (Model == CodeModel::Small || Model == CodeModel::Medium)
109 return DW_EH_PE_udata4;
111 return DW_EH_PE_absptr;
114 unsigned X8664_ELFTargetObjectFile::getLSDAEncoding() const {
115 CodeModel::Model Model = TM.getCodeModel();
116 if (TM.getRelocationModel() == Reloc::PIC_)
117 return DW_EH_PE_pcrel | (Model == CodeModel::Small ?
118 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
120 if (Model == CodeModel::Small)
121 return DW_EH_PE_udata4;
123 return DW_EH_PE_absptr;
126 unsigned X8664_ELFTargetObjectFile::getFDEEncoding() const {
127 CodeModel::Model Model = TM.getCodeModel();
128 if (TM.getRelocationModel() == Reloc::PIC_)
129 return DW_EH_PE_pcrel | (Model == CodeModel::Small ||
130 Model == CodeModel::Medium ?
131 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
133 if (Model == CodeModel::Small || Model == CodeModel::Medium)
134 return DW_EH_PE_udata4;
136 return DW_EH_PE_absptr;
139 unsigned X8664_ELFTargetObjectFile::getTTypeEncoding() const {
140 CodeModel::Model Model = TM.getCodeModel();
141 if (TM.getRelocationModel() == Reloc::PIC_)
142 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
143 Model == CodeModel::Medium ?
144 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
146 if (Model == CodeModel::Small)
147 return DW_EH_PE_udata4;
149 return DW_EH_PE_absptr;