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 *X8664_MachoTargetObjectFile::
22 getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
23 MachineModuleInfo *MMI, unsigned Encoding) const {
25 // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
26 // is an indirect pc-relative reference.
27 if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
28 SmallString<128> Name;
29 Mang->getNameWithPrefix(Name, GV, false);
30 const MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
32 X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext());
33 const MCExpr *Four = MCConstantExpr::Create(4, getContext());
34 return MCBinaryExpr::CreateAdd(Res, Four, getContext());
37 return TargetLoweringObjectFileMachO::
38 getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
41 unsigned X8632_ELFTargetObjectFile::getPersonalityEncoding() const {
42 if (TM.getRelocationModel() == Reloc::PIC_)
43 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
45 return DW_EH_PE_absptr;
48 unsigned X8632_ELFTargetObjectFile::getLSDAEncoding() const {
49 if (TM.getRelocationModel() == Reloc::PIC_)
50 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
52 return DW_EH_PE_absptr;
55 unsigned X8632_ELFTargetObjectFile::getFDEEncoding() const {
56 if (TM.getRelocationModel() == Reloc::PIC_)
57 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
59 return DW_EH_PE_absptr;
62 unsigned X8632_ELFTargetObjectFile::getTTypeEncoding() const {
63 if (TM.getRelocationModel() == Reloc::PIC_)
64 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
66 return DW_EH_PE_absptr;
69 unsigned X8664_ELFTargetObjectFile::getPersonalityEncoding() const {
70 CodeModel::Model Model = TM.getCodeModel();
71 if (TM.getRelocationModel() == Reloc::PIC_)
72 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
73 Model == CodeModel::Medium ?
74 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
76 if (Model == CodeModel::Small || Model == CodeModel::Medium)
77 return DW_EH_PE_udata4;
79 return DW_EH_PE_absptr;
82 unsigned X8664_ELFTargetObjectFile::getLSDAEncoding() const {
83 CodeModel::Model Model = TM.getCodeModel();
84 if (TM.getRelocationModel() == Reloc::PIC_)
85 return DW_EH_PE_pcrel | (Model == CodeModel::Small ?
86 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
88 if (Model == CodeModel::Small)
89 return DW_EH_PE_udata4;
91 return DW_EH_PE_absptr;
94 unsigned X8664_ELFTargetObjectFile::getFDEEncoding() const {
95 CodeModel::Model Model = TM.getCodeModel();
96 if (TM.getRelocationModel() == Reloc::PIC_)
97 return DW_EH_PE_pcrel | (Model == CodeModel::Small ||
98 Model == CodeModel::Medium ?
99 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
101 if (Model == CodeModel::Small || Model == CodeModel::Medium)
102 return DW_EH_PE_udata4;
104 return DW_EH_PE_absptr;
107 unsigned X8664_ELFTargetObjectFile::getTTypeEncoding() const {
108 CodeModel::Model Model = TM.getCodeModel();
109 if (TM.getRelocationModel() == Reloc::PIC_)
110 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
111 Model == CodeModel::Medium ?
112 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
114 if (Model == CodeModel::Small)
115 return DW_EH_PE_udata4;
117 return DW_EH_PE_absptr;