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757e75b033
to is local to the translation unit, we need to place fill the value of that symbol into the non-lazy pointer. This should conclude all Darwin changes for placing the LSDA into the TEXT section. There is some cleanup to do. I.e., there's no longer a special need for target-specific code here. But that can come later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98564 91177308-0d34-0410-b5e6-96231b3b80d8
138 lines
4.7 KiB
C++
138 lines
4.7 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 "X86MCTargetExpr.h"
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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/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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void X86_MachoTargetObjectFile::Initialize(MCContext &Ctx,
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const TargetMachine &TM) {
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TargetLoweringObjectFileMachO::Initialize(Ctx, TM);
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// Exception Handling.
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LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
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SectionKind::getReadOnlyWithRel());
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}
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unsigned X86_MachoTargetObjectFile::getTTypeEncoding() const {
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return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
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}
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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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SmallString<128> Name;
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Mang->getNameWithPrefix(Name, GV, false);
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const MCSymbol *Sym;
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if (GV->hasPrivateLinkage())
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Sym = getContext().GetOrCreateTemporarySymbol(Name);
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else
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Sym = getContext().GetOrCreateSymbol(Name);
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const MCExpr *Res =
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X86MCTargetExpr::Create(Sym, X86MCTargetExpr::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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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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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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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::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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