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 "X86TargetObjectFile.h"
11 #include "X86TargetMachine.h"
12 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
13 #include "llvm/MC/MCContext.h"
14 #include "llvm/MC/MCExpr.h"
15 #include "llvm/MC/MCSectionMachO.h"
16 #include "llvm/Target/Mangler.h"
17 #include "llvm/ADT/SmallString.h"
18 #include "llvm/Support/Dwarf.h"
20 using namespace dwarf;
22 const MCExpr *X8664_MachoTargetObjectFile::
23 getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
24 MachineModuleInfo *MMI, unsigned Encoding,
25 MCStreamer &Streamer) const {
27 // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
28 // is an indirect pc-relative reference.
29 if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
30 const MCSymbol *Sym = Mang->getSymbol(GV);
32 MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
33 const MCExpr *Four = MCConstantExpr::Create(4, getContext());
34 return MCBinaryExpr::CreateAdd(Res, Four, getContext());
37 return TargetLoweringObjectFileMachO::
38 getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
41 MCSymbol *X8664_MachoTargetObjectFile::
42 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
43 MachineModuleInfo *MMI) const {
44 return Mang->getSymbol(GV);
47 unsigned X8632_ELFTargetObjectFile::getPersonalityEncoding() const {
48 if (TM.getRelocationModel() == Reloc::PIC_)
49 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
51 return DW_EH_PE_absptr;
54 unsigned X8632_ELFTargetObjectFile::getLSDAEncoding() const {
55 if (TM.getRelocationModel() == Reloc::PIC_)
56 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
58 return DW_EH_PE_absptr;
61 unsigned X8632_ELFTargetObjectFile::getFDEEncoding() const {
62 if (TM.getRelocationModel() == Reloc::PIC_)
63 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
65 return DW_EH_PE_absptr;
68 unsigned X8632_ELFTargetObjectFile::getTTypeEncoding() const {
69 if (TM.getRelocationModel() == Reloc::PIC_)
70 return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
72 return DW_EH_PE_absptr;
75 unsigned X8664_ELFTargetObjectFile::getPersonalityEncoding() const {
76 CodeModel::Model Model = TM.getCodeModel();
77 if (TM.getRelocationModel() == Reloc::PIC_)
78 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
79 Model == CodeModel::Medium ?
80 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
82 if (Model == CodeModel::Small || Model == CodeModel::Medium)
83 return DW_EH_PE_udata4;
85 return DW_EH_PE_absptr;
88 unsigned X8664_ELFTargetObjectFile::getLSDAEncoding() const {
89 CodeModel::Model Model = TM.getCodeModel();
90 if (TM.getRelocationModel() == Reloc::PIC_)
91 return DW_EH_PE_pcrel | (Model == CodeModel::Small ?
92 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
94 if (Model == CodeModel::Small)
95 return DW_EH_PE_udata4;
97 return DW_EH_PE_absptr;
100 unsigned X8664_ELFTargetObjectFile::getFDEEncoding() const {
101 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
104 unsigned X8664_ELFTargetObjectFile::getTTypeEncoding() const {
105 CodeModel::Model Model = TM.getCodeModel();
106 if (TM.getRelocationModel() == Reloc::PIC_)
107 return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
108 Model == CodeModel::Medium ?
109 DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
111 if (Model == CodeModel::Small)
112 return DW_EH_PE_udata4;
114 return DW_EH_PE_absptr;