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0525497a16
give it a bit more responsibility. Also implement it for MachO. If hacked to use cfi, 32 bit MachO will produce .cfi_personality 155, L___gxx_personality_v0$non_lazy_ptr and 64 bit will produce .cfi_presonality ___gxx_personality_v0 The general idea is that .cfi_personality gets passed the final symbol. It is up to codegen to produce it if using indirect representation (like 32 bit MachO), but it is up to MC to decide which relocations to create. llvm-svn: 130341
116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
//===-- llvm/Target/X86/X86TargetObjectFile.cpp - X86 Object Info ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "X86TargetObjectFile.h"
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#include "X86TargetMachine.h"
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/Target/Mangler.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/Dwarf.h"
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using namespace llvm;
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using namespace dwarf;
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const MCExpr *X8664_MachoTargetObjectFile::
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getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
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MachineModuleInfo *MMI, unsigned Encoding,
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MCStreamer &Streamer) const {
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// On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
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// is an indirect pc-relative reference.
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if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
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const MCSymbol *Sym = Mang->getSymbol(GV);
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const MCExpr *Res =
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MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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const MCExpr *Four = MCConstantExpr::Create(4, getContext());
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return MCBinaryExpr::CreateAdd(Res, Four, getContext());
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}
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return TargetLoweringObjectFileMachO::
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getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
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}
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MCSymbol *X8664_MachoTargetObjectFile::
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getCFIPersonalitySymbol(const GlobalValue *GV, unsigned Encoding, Mangler *Mang,
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MachineModuleInfo *MMI) const {
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return Mang->getSymbol(GV);
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}
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unsigned X8632_ELFTargetObjectFile::getPersonalityEncoding() const {
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
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else
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return DW_EH_PE_absptr;
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}
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unsigned X8632_ELFTargetObjectFile::getLSDAEncoding() const {
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
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else
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return DW_EH_PE_absptr;
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}
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unsigned X8632_ELFTargetObjectFile::getFDEEncoding() const {
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
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else
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return DW_EH_PE_absptr;
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}
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unsigned X8632_ELFTargetObjectFile::getTTypeEncoding() const {
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
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else
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return DW_EH_PE_absptr;
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}
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unsigned X8664_ELFTargetObjectFile::getPersonalityEncoding() const {
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CodeModel::Model Model = TM.getCodeModel();
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
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Model == CodeModel::Medium ?
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DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
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if (Model == CodeModel::Small || Model == CodeModel::Medium)
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return DW_EH_PE_udata4;
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return DW_EH_PE_absptr;
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}
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unsigned X8664_ELFTargetObjectFile::getLSDAEncoding() const {
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CodeModel::Model Model = TM.getCodeModel();
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_pcrel | (Model == CodeModel::Small ?
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DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
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if (Model == CodeModel::Small)
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return DW_EH_PE_udata4;
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return DW_EH_PE_absptr;
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}
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unsigned X8664_ELFTargetObjectFile::getFDEEncoding() const {
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return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
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}
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unsigned X8664_ELFTargetObjectFile::getTTypeEncoding() const {
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CodeModel::Model Model = TM.getCodeModel();
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if (TM.getRelocationModel() == Reloc::PIC_)
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return DW_EH_PE_indirect | DW_EH_PE_pcrel | (Model == CodeModel::Small ||
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Model == CodeModel::Medium ?
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DW_EH_PE_sdata4 : DW_EH_PE_sdata8);
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if (Model == CodeModel::Small)
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return DW_EH_PE_udata4;
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return DW_EH_PE_absptr;
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}
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