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) &&
60 (Encoding & DW_EH_PE_pcrel)) {
61 SmallString<128> Name;
62 Mang->getNameWithPrefix(Name, GV, false);
63 const MCSymbol *Sym = getContext().CreateSymbol(Name);
65 X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext());
66 const MCExpr *Four = MCConstantExpr::Create(4, getContext());
67 return MCBinaryExpr::CreateAdd(Res, Four, getContext());
70 return TargetLoweringObjectFileMachO::
71 getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
74 unsigned X8632_ELFTargetObjectFile::getPersonalityEncoding() const {
75 if (TM.getRelocationModel() == Reloc::PIC_)
76 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
78 return DW_EH_PE_absptr;
81 unsigned X8632_ELFTargetObjectFile::getLSDAEncoding() const {
82 if (TM.getRelocationModel() == Reloc::PIC_)
83 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
85 return DW_EH_PE_absptr;
88 unsigned X8632_ELFTargetObjectFile::getFDEEncoding() const {
89 if (TM.getRelocationModel() == Reloc::PIC_)
90 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
92 return DW_EH_PE_absptr;
95 unsigned X8632_ELFTargetObjectFile::getTTypeEncoding() const {
96 if (TM.getRelocationModel() == Reloc::PIC_)
97 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
99 return DW_EH_PE_absptr;
102 unsigned X8664_ELFTargetObjectFile::getPersonalityEncoding() const {
103 CodeModel::Model Model = TM.getCodeModel();
104 if (TM.getRelocationModel() == Reloc::PIC_)
105 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
106 Model == CodeModel::Medium ?
107 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
109 if (Model == CodeModel::Small || Model == CodeModel::Medium)
110 return DW_EH_PE_udata4;
112 return DW_EH_PE_absptr;
115 unsigned X8664_ELFTargetObjectFile::getLSDAEncoding() const {
116 CodeModel::Model Model = TM.getCodeModel();
117 if (TM.getRelocationModel() == Reloc::PIC_)
118 return DW_EH_PE_pcrel | (Model == CodeModel::Small ?
119 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
121 if (Model == CodeModel::Small)
122 return DW_EH_PE_udata4;
124 return DW_EH_PE_absptr;
127 unsigned X8664_ELFTargetObjectFile::getFDEEncoding() const {
128 CodeModel::Model Model = TM.getCodeModel();
129 if (TM.getRelocationModel() == Reloc::PIC_)
130 return DW_EH_PE_pcrel | (Model == CodeModel::Small ||
131 Model == CodeModel::Medium ?
132 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
134 if (Model == CodeModel::Small || Model == CodeModel::Medium)
135 return DW_EH_PE_udata4;
137 return DW_EH_PE_absptr;
140 unsigned X8664_ELFTargetObjectFile::getTTypeEncoding() const {
141 CodeModel::Model Model = TM.getCodeModel();
142 if (TM.getRelocationModel() == Reloc::PIC_)
143 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
144 Model == CodeModel::Medium ?
145 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
147 if (Model == CodeModel::Small)
148 return DW_EH_PE_udata4;
150 return DW_EH_PE_absptr;
153 unsigned X8632_MachoTargetObjectFile::getPersonalityEncoding() const {
154 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
157 unsigned X8632_MachoTargetObjectFile::getLSDAEncoding() const {
158 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
161 unsigned X8632_MachoTargetObjectFile::getFDEEncoding() const {
162 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
165 unsigned X8632_MachoTargetObjectFile::getTTypeEncoding() const {
166 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
169 unsigned X8664_MachoTargetObjectFile::getPersonalityEncoding() const {
170 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
173 unsigned X8664_MachoTargetObjectFile::getLSDAEncoding() const {
174 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
177 unsigned X8664_MachoTargetObjectFile::getFDEEncoding() const {
178 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
181 unsigned X8664_MachoTargetObjectFile::getTTypeEncoding() const {
182 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;