X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FTargetLoweringObjectFileImpl.cpp;h=a2f4810cb6c75aeebb0045d74c182ef7404b459f;hb=3bfc4d8e13edd83534b733f0f1de5b1d5f6bf828;hp=cdac42d1bf17531405ac4af6fa34477ffaba817d;hpb=d846e3fb5a36c625df1bea3d4ef4e337b7b6e917;p=oota-llvm.git diff --git a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp index cdac42d1bf1..a2f4810cb6c 100644 --- a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp +++ b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp @@ -13,29 +13,30 @@ //===----------------------------------------------------------------------===// #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h" -#include "llvm/Constants.h" -#include "llvm/DerivedTypes.h" -#include "llvm/Function.h" -#include "llvm/GlobalVariable.h" +#include "llvm/ADT/SmallString.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/ADT/Triple.h" #include "llvm/CodeGen/MachineModuleInfoImpls.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/GlobalVariable.h" +#include "llvm/IR/Mangler.h" +#include "llvm/IR/Module.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCSectionMachO.h" -#include "llvm/MC/MCSectionELF.h" #include "llvm/MC/MCSectionCOFF.h" +#include "llvm/MC/MCSectionELF.h" +#include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" -#include "llvm/Target/Mangler.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" #include "llvm/Support/Dwarf.h" #include "llvm/Support/ELF.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/raw_ostream.h" -#include "llvm/ADT/SmallString.h" -#include "llvm/ADT/StringExtras.h" -#include "llvm/ADT/Triple.h" +#include "llvm/Target/TargetLowering.h" +#include "llvm/Target/TargetMachine.h" using namespace llvm; using namespace dwarf; @@ -43,155 +44,18 @@ using namespace dwarf; // ELF //===----------------------------------------------------------------------===// -void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx, - const TargetMachine &TM) { - TargetLoweringObjectFile::Initialize(Ctx, TM); - - BSSSection = - getContext().getELFSection(".bss", ELF::SHT_NOBITS, - ELF::SHF_WRITE |ELF::SHF_ALLOC, - SectionKind::getBSS()); - - TextSection = - getContext().getELFSection(".text", ELF::SHT_PROGBITS, - ELF::SHF_EXECINSTR | - ELF::SHF_ALLOC, - SectionKind::getText()); - - DataSection = - getContext().getELFSection(".data", ELF::SHT_PROGBITS, - ELF::SHF_WRITE |ELF::SHF_ALLOC, - SectionKind::getDataRel()); - - ReadOnlySection = - getContext().getELFSection(".rodata", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC, - SectionKind::getReadOnly()); - - TLSDataSection = - getContext().getELFSection(".tdata", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_TLS | - ELF::SHF_WRITE, - SectionKind::getThreadData()); - - TLSBSSSection = - getContext().getELFSection(".tbss", ELF::SHT_NOBITS, - ELF::SHF_ALLOC | ELF::SHF_TLS | - ELF::SHF_WRITE, - SectionKind::getThreadBSS()); - - DataRelSection = - getContext().getELFSection(".data.rel", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_WRITE, - SectionKind::getDataRel()); - - DataRelLocalSection = - getContext().getELFSection(".data.rel.local", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_WRITE, - SectionKind::getDataRelLocal()); - - DataRelROSection = - getContext().getELFSection(".data.rel.ro", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_WRITE, - SectionKind::getReadOnlyWithRel()); - - DataRelROLocalSection = - getContext().getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_WRITE, - SectionKind::getReadOnlyWithRelLocal()); - - MergeableConst4Section = - getContext().getELFSection(".rodata.cst4", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_MERGE, - SectionKind::getMergeableConst4()); - - MergeableConst8Section = - getContext().getELFSection(".rodata.cst8", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_MERGE, - SectionKind::getMergeableConst8()); - - MergeableConst16Section = - getContext().getELFSection(".rodata.cst16", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_MERGE, - SectionKind::getMergeableConst16()); - - StaticCtorSection = - getContext().getELFSection(".ctors", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_WRITE, - SectionKind::getDataRel()); - - StaticDtorSection = - getContext().getELFSection(".dtors", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC |ELF::SHF_WRITE, - SectionKind::getDataRel()); - - // Exception Handling Sections. - - // FIXME: We're emitting LSDA info into a readonly section on ELF, even though - // it contains relocatable pointers. In PIC mode, this is probably a big - // runtime hit for C++ apps. Either the contents of the LSDA need to be - // adjusted or this should be a data section. - LSDASection = - getContext().getELFSection(".gcc_except_table", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC, - SectionKind::getReadOnly()); - // Debug Info Sections. - DwarfAbbrevSection = - getContext().getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfInfoSection = - getContext().getELFSection(".debug_info", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfLineSection = - getContext().getELFSection(".debug_line", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfFrameSection = - getContext().getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfPubNamesSection = - getContext().getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfPubTypesSection = - getContext().getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfStrSection = - getContext().getELFSection(".debug_str", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfLocSection = - getContext().getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfARangesSection = - getContext().getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfRangesSection = - getContext().getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); - DwarfMacroInfoSection = - getContext().getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0, - SectionKind::getMetadata()); -} - -const MCSection *TargetLoweringObjectFileELF::getEHFrameSection() const { - return getContext().getELFSection(".eh_frame", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC, - SectionKind::getDataRel()); -} - -MCSymbol * -TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV, - Mangler *Mang, - MachineModuleInfo *MMI) const { +MCSymbol *TargetLoweringObjectFileELF::getCFIPersonalitySymbol( + const GlobalValue *GV, Mangler &Mang, const TargetMachine &TM, + MachineModuleInfo *MMI) const { unsigned Encoding = getPersonalityEncoding(); switch (Encoding & 0x70) { default: report_fatal_error("We do not support this DWARF encoding yet!"); case dwarf::DW_EH_PE_absptr: - return Mang->getSymbol(GV); - break; + return TM.getSymbol(GV, Mang); case dwarf::DW_EH_PE_pcrel: { - Twine FullName = StringRef("DW.ref.") + Mang->getSymbol(GV)->getName(); - return getContext().GetOrCreateSymbol(FullName); - break; + return getContext().GetOrCreateSymbol(StringRef("DW.ref.") + + TM.getSymbol(GV, Mang)->getName()); } } } @@ -199,37 +63,65 @@ TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV, void TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer, const TargetMachine &TM, const MCSymbol *Sym) const { - Twine FullName = StringRef("DW.ref.") + Sym->getName(); - MCSymbol *Label = getContext().GetOrCreateSymbol(FullName); + SmallString<64> NameData("DW.ref."); + NameData += Sym->getName(); + MCSymbol *Label = getContext().GetOrCreateSymbol(NameData); Streamer.EmitSymbolAttribute(Label, MCSA_Hidden); Streamer.EmitSymbolAttribute(Label, MCSA_Weak); - Twine SectionName = StringRef(".data.") + Label->getName(); - SmallString<64> NameData; - SectionName.toVector(NameData); + StringRef Prefix = ".data."; + NameData.insert(NameData.begin(), Prefix.begin(), Prefix.end()); unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP; const MCSection *Sec = getContext().getELFSection(NameData, ELF::SHT_PROGBITS, Flags, SectionKind::getDataRel(), 0, Label->getName()); + unsigned Size = TM.getDataLayout()->getPointerSize(); Streamer.SwitchSection(Sec); - Streamer.EmitValueToAlignment(8); + Streamer.EmitValueToAlignment(TM.getDataLayout()->getPointerABIAlignment()); Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject); - const MCExpr *E = MCConstantExpr::Create(8, getContext()); + const MCExpr *E = MCConstantExpr::Create(Size, getContext()); Streamer.EmitELFSize(Label, E); Streamer.EmitLabel(Label); - unsigned Size = TM.getTargetData()->getPointerSize(); Streamer.EmitSymbolValue(Sym, Size); } +const MCExpr *TargetLoweringObjectFileELF::getTTypeGlobalReference( + const GlobalValue *GV, unsigned Encoding, Mangler &Mang, + const TargetMachine &TM, MachineModuleInfo *MMI, + MCStreamer &Streamer) const { + + if (Encoding & dwarf::DW_EH_PE_indirect) { + MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo(); + + MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, ".DW.stub", Mang, TM); + + // Add information about the stub reference to ELFMMI so that the stub + // gets emitted by the asmprinter. + MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym); + if (StubSym.getPointer() == 0) { + MCSymbol *Sym = TM.getSymbol(GV, Mang); + StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); + } + + return TargetLoweringObjectFile:: + getTTypeReference(MCSymbolRefExpr::Create(SSym, getContext()), + Encoding & ~dwarf::DW_EH_PE_indirect, Streamer); + } + + return TargetLoweringObjectFile:: + getTTypeGlobalReference(GV, Encoding, Mang, TM, MMI, Streamer); +} + static SectionKind getELFKindForNamedSection(StringRef Name, SectionKind K) { // N.B.: The defaults used in here are no the same ones used in MC. // We follow gcc, MC follows gas. For example, given ".section .eh_frame", // both gas and MC will produce a section with no flags. Given - // section(".eh_frame") gcc will produce - // .section .eh_frame,"a",@progbits + // section(".eh_frame") gcc will produce: + // + // .section .eh_frame,"a",@progbits if (Name.empty() || Name[0] != '.') return K; // Some lame default implementation based on some magic section names. @@ -304,10 +196,9 @@ getELFSectionFlags(SectionKind K) { return Flags; } - -const MCSection *TargetLoweringObjectFileELF:: -getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const { +const MCSection *TargetLoweringObjectFileELF::getExplicitSectionGlobal( + const GlobalValue *GV, SectionKind Kind, Mangler &Mang, + const TargetMachine &TM) const { StringRef SectionName = GV->getSection(); // Infer section flags from the section name if we can. @@ -323,6 +214,7 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, static const char *getSectionPrefixForGlobal(SectionKind Kind) { if (Kind.isText()) return ".text."; if (Kind.isReadOnly()) return ".rodata."; + if (Kind.isBSS()) return ".bss."; if (Kind.isThreadData()) return ".tdata."; if (Kind.isThreadBSS()) return ".tbss."; @@ -339,7 +231,7 @@ static const char *getSectionPrefixForGlobal(SectionKind Kind) { const MCSection *TargetLoweringObjectFileELF:: SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const { + Mangler &Mang, const TargetMachine &TM) const { // If we have -ffunction-section or -fdata-section then we should emit the // global value to a uniqued section specifically for it. bool EmitUniquedSection; @@ -351,17 +243,17 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, // If this global is linkonce/weak and the target handles this by emitting it // into a 'uniqued' section name, create and return the section now. if ((GV->isWeakForLinker() || EmitUniquedSection) && - !Kind.isCommon() && !Kind.isBSS()) { + !Kind.isCommon()) { const char *Prefix; Prefix = getSectionPrefixForGlobal(Kind); SmallString<128> Name(Prefix, Prefix+strlen(Prefix)); - MCSymbol *Sym = Mang->getSymbol(GV); - Name.append(Sym->getName().begin(), Sym->getName().end()); + TM.getNameWithPrefix(Name, GV, Mang, true); + StringRef Group = ""; unsigned Flags = getELFSectionFlags(Kind); if (GV->isWeakForLinker()) { - Group = Sym->getName(); + Group = Name.substr(strlen(Prefix)); Flags |= ELF::SHF_GROUP; } @@ -380,7 +272,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, // FIXME: this is getting the alignment of the character, not the // alignment of the global! unsigned Align = - TM.getTargetData()->getPreferredAlignment(cast(GV)); + TM.getDataLayout()->getPreferredAlignment(cast(GV)); const char *SizeSpec = ".rodata.str1."; if (Kind.isMergeable2ByteCString()) @@ -447,229 +339,157 @@ getSectionForConstant(SectionKind Kind) const { return DataRelROSection; } -const MCExpr *TargetLoweringObjectFileELF:: -getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, - MachineModuleInfo *MMI, - unsigned Encoding, MCStreamer &Streamer) const { - - if (Encoding & dwarf::DW_EH_PE_indirect) { - MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo(); - - SmallString<128> Name; - Mang->getNameWithPrefix(Name, GV, true); - Name += ".DW.stub"; - - // Add information about the stub reference to ELFMMI so that the stub - // gets emitted by the asmprinter. - MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str()); - MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym); - if (StubSym.getPointer() == 0) { - MCSymbol *Sym = Mang->getSymbol(GV); - StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); - } +const MCSection * +TargetLoweringObjectFileELF::getStaticCtorSection(unsigned Priority) const { + // The default scheme is .ctor / .dtor, so we have to invert the priority + // numbering. + if (Priority == 65535) + return StaticCtorSection; + + if (UseInitArray) { + std::string Name = std::string(".init_array.") + utostr(Priority); + return getContext().getELFSection(Name, ELF::SHT_INIT_ARRAY, + ELF::SHF_ALLOC | ELF::SHF_WRITE, + SectionKind::getDataRel()); + } else { + std::string Name = std::string(".ctors.") + utostr(65535 - Priority); + return getContext().getELFSection(Name, ELF::SHT_PROGBITS, + ELF::SHF_ALLOC |ELF::SHF_WRITE, + SectionKind::getDataRel()); + } +} - return TargetLoweringObjectFile:: - getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer); +const MCSection * +TargetLoweringObjectFileELF::getStaticDtorSection(unsigned Priority) const { + // The default scheme is .ctor / .dtor, so we have to invert the priority + // numbering. + if (Priority == 65535) + return StaticDtorSection; + + if (UseInitArray) { + std::string Name = std::string(".fini_array.") + utostr(Priority); + return getContext().getELFSection(Name, ELF::SHT_FINI_ARRAY, + ELF::SHF_ALLOC | ELF::SHF_WRITE, + SectionKind::getDataRel()); + } else { + std::string Name = std::string(".dtors.") + utostr(65535 - Priority); + return getContext().getELFSection(Name, ELF::SHT_PROGBITS, + ELF::SHF_ALLOC |ELF::SHF_WRITE, + SectionKind::getDataRel()); } +} - return TargetLoweringObjectFile:: - getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer); +void +TargetLoweringObjectFileELF::InitializeELF(bool UseInitArray_) { + UseInitArray = UseInitArray_; + if (!UseInitArray) + return; + + StaticCtorSection = + getContext().getELFSection(".init_array", ELF::SHT_INIT_ARRAY, + ELF::SHF_WRITE | + ELF::SHF_ALLOC, + SectionKind::getDataRel()); + StaticDtorSection = + getContext().getELFSection(".fini_array", ELF::SHT_FINI_ARRAY, + ELF::SHF_WRITE | + ELF::SHF_ALLOC, + SectionKind::getDataRel()); } //===----------------------------------------------------------------------===// // MachO //===----------------------------------------------------------------------===// -void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx, - const TargetMachine &TM) { - IsFunctionEHFrameSymbolPrivate = false; - SupportsWeakOmittedEHFrame = false; - - // .comm doesn't support alignment before Leopard. - Triple T(((LLVMTargetMachine&)TM).getTargetTriple()); - if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5)) - CommDirectiveSupportsAlignment = false; - - TargetLoweringObjectFile::Initialize(Ctx, TM); - - TextSection // .text - = getContext().getMachOSection("__TEXT", "__text", - MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, - SectionKind::getText()); - DataSection // .data - = getContext().getMachOSection("__DATA", "__data", 0, - SectionKind::getDataRel()); - - TLSDataSection // .tdata - = getContext().getMachOSection("__DATA", "__thread_data", - MCSectionMachO::S_THREAD_LOCAL_REGULAR, - SectionKind::getDataRel()); - TLSBSSSection // .tbss - = getContext().getMachOSection("__DATA", "__thread_bss", - MCSectionMachO::S_THREAD_LOCAL_ZEROFILL, - SectionKind::getThreadBSS()); - - // TODO: Verify datarel below. - TLSTLVSection // .tlv - = getContext().getMachOSection("__DATA", "__thread_vars", - MCSectionMachO::S_THREAD_LOCAL_VARIABLES, - SectionKind::getDataRel()); - - TLSThreadInitSection - = getContext().getMachOSection("__DATA", "__thread_init", - MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS, - SectionKind::getDataRel()); - - CStringSection // .cstring - = getContext().getMachOSection("__TEXT", "__cstring", - MCSectionMachO::S_CSTRING_LITERALS, - SectionKind::getMergeable1ByteCString()); - UStringSection - = getContext().getMachOSection("__TEXT","__ustring", 0, - SectionKind::getMergeable2ByteCString()); - FourByteConstantSection // .literal4 - = getContext().getMachOSection("__TEXT", "__literal4", - MCSectionMachO::S_4BYTE_LITERALS, - SectionKind::getMergeableConst4()); - EightByteConstantSection // .literal8 - = getContext().getMachOSection("__TEXT", "__literal8", - MCSectionMachO::S_8BYTE_LITERALS, - SectionKind::getMergeableConst8()); - - // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back - // to using it in -static mode. - SixteenByteConstantSection = 0; - if (TM.getRelocationModel() != Reloc::Static && - TM.getTargetData()->getPointerSize() == 32) - SixteenByteConstantSection = // .literal16 - getContext().getMachOSection("__TEXT", "__literal16", - MCSectionMachO::S_16BYTE_LITERALS, - SectionKind::getMergeableConst16()); - - ReadOnlySection // .const - = getContext().getMachOSection("__TEXT", "__const", 0, - SectionKind::getReadOnly()); - - TextCoalSection - = getContext().getMachOSection("__TEXT", "__textcoal_nt", - MCSectionMachO::S_COALESCED | - MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, - SectionKind::getText()); - ConstTextCoalSection - = getContext().getMachOSection("__TEXT", "__const_coal", - MCSectionMachO::S_COALESCED, - SectionKind::getReadOnly()); - ConstDataSection // .const_data - = getContext().getMachOSection("__DATA", "__const", 0, - SectionKind::getReadOnlyWithRel()); - DataCoalSection - = getContext().getMachOSection("__DATA","__datacoal_nt", - MCSectionMachO::S_COALESCED, - SectionKind::getDataRel()); - DataCommonSection - = getContext().getMachOSection("__DATA","__common", - MCSectionMachO::S_ZEROFILL, - SectionKind::getBSS()); - DataBSSSection - = getContext().getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL, - SectionKind::getBSS()); - - - LazySymbolPointerSection - = getContext().getMachOSection("__DATA", "__la_symbol_ptr", - MCSectionMachO::S_LAZY_SYMBOL_POINTERS, - SectionKind::getMetadata()); - NonLazySymbolPointerSection - = getContext().getMachOSection("__DATA", "__nl_symbol_ptr", - MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS, - SectionKind::getMetadata()); - - if (TM.getRelocationModel() == Reloc::Static) { - StaticCtorSection - = getContext().getMachOSection("__TEXT", "__constructor", 0, - SectionKind::getDataRel()); - StaticDtorSection - = getContext().getMachOSection("__TEXT", "__destructor", 0, - SectionKind::getDataRel()); - } else { - StaticCtorSection - = getContext().getMachOSection("__DATA", "__mod_init_func", - MCSectionMachO::S_MOD_INIT_FUNC_POINTERS, - SectionKind::getDataRel()); - StaticDtorSection - = getContext().getMachOSection("__DATA", "__mod_term_func", - MCSectionMachO::S_MOD_TERM_FUNC_POINTERS, - SectionKind::getDataRel()); +/// getDepLibFromLinkerOpt - Extract the dependent library name from a linker +/// option string. Returns StringRef() if the option does not specify a library. +StringRef TargetLoweringObjectFileMachO:: +getDepLibFromLinkerOpt(StringRef LinkerOption) const { + const char *LibCmd = "-l"; + if (LinkerOption.startswith(LibCmd)) + return LinkerOption.substr(strlen(LibCmd)); + return StringRef(); +} + +/// emitModuleFlags - Perform code emission for module flags. +void TargetLoweringObjectFileMachO:: +emitModuleFlags(MCStreamer &Streamer, + ArrayRef ModuleFlags, + Mangler &Mang, const TargetMachine &TM) const { + unsigned VersionVal = 0; + unsigned ImageInfoFlags = 0; + MDNode *LinkerOptions = 0; + StringRef SectionVal; + + for (ArrayRef::iterator + i = ModuleFlags.begin(), e = ModuleFlags.end(); i != e; ++i) { + const Module::ModuleFlagEntry &MFE = *i; + + // Ignore flags with 'Require' behavior. + if (MFE.Behavior == Module::Require) + continue; + + StringRef Key = MFE.Key->getString(); + Value *Val = MFE.Val; + + if (Key == "Objective-C Image Info Version") { + VersionVal = cast(Val)->getZExtValue(); + } else if (Key == "Objective-C Garbage Collection" || + Key == "Objective-C GC Only" || + Key == "Objective-C Is Simulated") { + ImageInfoFlags |= cast(Val)->getZExtValue(); + } else if (Key == "Objective-C Image Info Section") { + SectionVal = cast(Val)->getString(); + } else if (Key == "Linker Options") { + LinkerOptions = cast(Val); + } } - // Exception Handling. - LSDASection = getContext().getMachOSection("__TEXT", "__gcc_except_tab", 0, - SectionKind::getReadOnlyWithRel()); - // Debug Information. - DwarfAbbrevSection = - getContext().getMachOSection("__DWARF", "__debug_abbrev", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfInfoSection = - getContext().getMachOSection("__DWARF", "__debug_info", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfLineSection = - getContext().getMachOSection("__DWARF", "__debug_line", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfFrameSection = - getContext().getMachOSection("__DWARF", "__debug_frame", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfPubNamesSection = - getContext().getMachOSection("__DWARF", "__debug_pubnames", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfPubTypesSection = - getContext().getMachOSection("__DWARF", "__debug_pubtypes", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfStrSection = - getContext().getMachOSection("__DWARF", "__debug_str", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfLocSection = - getContext().getMachOSection("__DWARF", "__debug_loc", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfARangesSection = - getContext().getMachOSection("__DWARF", "__debug_aranges", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfRangesSection = - getContext().getMachOSection("__DWARF", "__debug_ranges", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfMacroInfoSection = - getContext().getMachOSection("__DWARF", "__debug_macinfo", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfDebugInlineSection = - getContext().getMachOSection("__DWARF", "__debug_inlined", - MCSectionMachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - - TLSExtraDataSection = TLSTLVSection; -} + // Emit the linker options if present. + if (LinkerOptions) { + for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) { + MDNode *MDOptions = cast(LinkerOptions->getOperand(i)); + SmallVector StrOptions; -const MCSection *TargetLoweringObjectFileMachO::getEHFrameSection() const { - return getContext().getMachOSection("__TEXT", "__eh_frame", - MCSectionMachO::S_COALESCED | - MCSectionMachO::S_ATTR_NO_TOC | - MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS | - MCSectionMachO::S_ATTR_LIVE_SUPPORT, - SectionKind::getReadOnly()); -} + // Convert to strings. + for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) { + MDString *MDOption = cast(MDOptions->getOperand(ii)); + StrOptions.push_back(MDOption->getString()); + } -const MCSection *TargetLoweringObjectFileMachO:: -getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const { + Streamer.EmitLinkerOptions(StrOptions); + } + } + + // The section is mandatory. If we don't have it, then we don't have GC info. + if (SectionVal.empty()) return; + + StringRef Segment, Section; + unsigned TAA = 0, StubSize = 0; + bool TAAParsed; + std::string ErrorCode = + MCSectionMachO::ParseSectionSpecifier(SectionVal, Segment, Section, + TAA, TAAParsed, StubSize); + if (!ErrorCode.empty()) + // If invalid, report the error with report_fatal_error. + report_fatal_error("Invalid section specifier '" + Section + "': " + + ErrorCode + "."); + + // Get the section. + const MCSectionMachO *S = + getContext().getMachOSection(Segment, Section, TAA, StubSize, + SectionKind::getDataNoRel()); + Streamer.SwitchSection(S); + Streamer.EmitLabel(getContext(). + GetOrCreateSymbol(StringRef("L_OBJC_IMAGE_INFO"))); + Streamer.EmitIntValue(VersionVal, 4); + Streamer.EmitIntValue(ImageInfoFlags, 4); + Streamer.AddBlankLine(); +} + +const MCSection *TargetLoweringObjectFileMachO::getExplicitSectionGlobal( + const GlobalValue *GV, SectionKind Kind, Mangler &Mang, + const TargetMachine &TM) const { // Parse the section specifier and create it if valid. StringRef Segment, Section; unsigned TAA = 0, StubSize = 0; @@ -679,11 +499,9 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, TAA, TAAParsed, StubSize); if (!ErrorCode.empty()) { // If invalid, report the error with report_fatal_error. - report_fatal_error("Global variable '" + GV->getNameStr() + - "' has an invalid section specifier '" + GV->getSection()+ - "': " + ErrorCode + "."); - // Fall back to dropping it into the data section. - return DataSection; + report_fatal_error("Global variable '" + GV->getName() + + "' has an invalid section specifier '" + + GV->getSection() + "': " + ErrorCode + "."); } // Get the section. @@ -700,17 +518,52 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, // to reject it here. if (S->getTypeAndAttributes() != TAA || S->getStubSize() != StubSize) { // If invalid, report the error with report_fatal_error. - report_fatal_error("Global variable '" + GV->getNameStr() + - "' section type or attributes does not match previous" - " section specifier"); + report_fatal_error("Global variable '" + GV->getName() + + "' section type or attributes does not match previous" + " section specifier"); } return S; } +bool TargetLoweringObjectFileMachO::isSectionAtomizableBySymbols( + const MCSection &Section) const { + const MCSectionMachO &SMO = static_cast(Section); + + // Sections holding 1 byte strings are atomized based on the data + // they contain. + // Sections holding 2 byte strings require symbols in order to be + // atomized. + // There is no dedicated section for 4 byte strings. + if (SMO.getKind().isMergeable1ByteCString()) + return false; + + if (SMO.getSegmentName() == "__DATA" && + SMO.getSectionName() == "__cfstring") + return false; + + switch (SMO.getType()) { + default: + return true; + + // These sections are atomized at the element boundaries without using + // symbols. + case MachO::S_4BYTE_LITERALS: + case MachO::S_8BYTE_LITERALS: + case MachO::S_16BYTE_LITERALS: + case MachO::S_LITERAL_POINTERS: + case MachO::S_NON_LAZY_SYMBOL_POINTERS: + case MachO::S_LAZY_SYMBOL_POINTERS: + case MachO::S_MOD_INIT_FUNC_POINTERS: + case MachO::S_MOD_TERM_FUNC_POINTERS: + case MachO::S_INTERPOSING: + return false; + } +} + const MCSection *TargetLoweringObjectFileMachO:: SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const { + Mangler &Mang, const TargetMachine &TM) const { // Handle thread local data. if (Kind.isThreadBSS()) return TLSBSSSection; @@ -729,14 +582,14 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, // FIXME: Alignment check should be handled by section classifier. if (Kind.isMergeable1ByteCString() && - TM.getTargetData()->getPreferredAlignment(cast(GV)) < 32) + TM.getDataLayout()->getPreferredAlignment(cast(GV)) < 32) return CStringSection; // Do not put 16-bit arrays in the UString section if they have an // externally visible label, this runs into issues with certain linker // versions. if (Kind.isMergeable2ByteCString() && !GV->hasExternalLinkage() && - TM.getTargetData()->getPreferredAlignment(cast(GV)) < 32) + TM.getDataLayout()->getPreferredAlignment(cast(GV)) < 32) return UStringSection; if (Kind.isMergeableConst()) { @@ -744,7 +597,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, return FourByteConstantSection; if (Kind.isMergeableConst8()) return EightByteConstantSection; - if (Kind.isMergeableConst16() && SixteenByteConstantSection) + if (Kind.isMergeableConst16()) return SixteenByteConstantSection; } @@ -783,257 +636,67 @@ TargetLoweringObjectFileMachO::getSectionForConstant(SectionKind Kind) const { return FourByteConstantSection; if (Kind.isMergeableConst8()) return EightByteConstantSection; - if (Kind.isMergeableConst16() && SixteenByteConstantSection) + if (Kind.isMergeableConst16()) return SixteenByteConstantSection; return ReadOnlySection; // .const } -/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively decide -/// not to emit the UsedDirective for some symbols in llvm.used. -// FIXME: REMOVE this (rdar://7071300) -bool TargetLoweringObjectFileMachO:: -shouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const { - /// On Darwin, internally linked data beginning with "L" or "l" does not have - /// the directive emitted (this occurs in ObjC metadata). - if (!GV) return false; - - // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix. - if (GV->hasLocalLinkage() && !isa(GV)) { - // FIXME: ObjC metadata is currently emitted as internal symbols that have - // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and - // this horrible hack can go away. - MCSymbol *Sym = Mang->getSymbol(GV); - if (Sym->getName()[0] == 'L' || Sym->getName()[0] == 'l') - return false; - } - - return true; -} - -const MCExpr *TargetLoweringObjectFileMachO:: -getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, - MachineModuleInfo *MMI, unsigned Encoding, - MCStreamer &Streamer) const { +const MCExpr *TargetLoweringObjectFileMachO::getTTypeGlobalReference( + const GlobalValue *GV, unsigned Encoding, Mangler &Mang, + const TargetMachine &TM, MachineModuleInfo *MMI, + MCStreamer &Streamer) const { // The mach-o version of this method defaults to returning a stub reference. if (Encoding & DW_EH_PE_indirect) { MachineModuleInfoMachO &MachOMMI = MMI->getObjFileInfo(); - SmallString<128> Name; - Mang->getNameWithPrefix(Name, GV, true); - Name += "$non_lazy_ptr"; + MCSymbol *SSym = + getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang, TM); // Add information about the stub reference to MachOMMI so that the stub // gets emitted by the asmprinter. - MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str()); - MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym); + MachineModuleInfoImpl::StubValueTy &StubSym = + GV->hasHiddenVisibility() ? MachOMMI.getHiddenGVStubEntry(SSym) : + MachOMMI.getGVStubEntry(SSym); if (StubSym.getPointer() == 0) { - MCSymbol *Sym = Mang->getSymbol(GV); + MCSymbol *Sym = TM.getSymbol(GV, Mang); StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); } return TargetLoweringObjectFile:: - getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer); + getTTypeReference(MCSymbolRefExpr::Create(SSym, getContext()), + Encoding & ~dwarf::DW_EH_PE_indirect, Streamer); } - return TargetLoweringObjectFile:: - getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer); + return TargetLoweringObjectFile::getTTypeGlobalReference(GV, Encoding, Mang, + TM, MMI, Streamer); } -MCSymbol *TargetLoweringObjectFileMachO:: -getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, - MachineModuleInfo *MMI) const { +MCSymbol *TargetLoweringObjectFileMachO::getCFIPersonalitySymbol( + const GlobalValue *GV, Mangler &Mang, const TargetMachine &TM, + MachineModuleInfo *MMI) const { // The mach-o version of this method defaults to returning a stub reference. MachineModuleInfoMachO &MachOMMI = MMI->getObjFileInfo(); - SmallString<128> Name; - Mang->getNameWithPrefix(Name, GV, true); - Name += "$non_lazy_ptr"; + MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang, TM); // Add information about the stub reference to MachOMMI so that the stub // gets emitted by the asmprinter. - MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str()); MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym); if (StubSym.getPointer() == 0) { - MCSymbol *Sym = Mang->getSymbol(GV); + MCSymbol *Sym = TM.getSymbol(GV, Mang); StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); } return SSym; } -unsigned TargetLoweringObjectFileMachO::getPersonalityEncoding() const { - return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4; -} - -unsigned TargetLoweringObjectFileMachO::getLSDAEncoding() const { - return DW_EH_PE_pcrel; -} - -unsigned TargetLoweringObjectFileMachO::getFDEEncoding(bool CFI) const { - return DW_EH_PE_pcrel; -} - -unsigned TargetLoweringObjectFileMachO::getTTypeEncoding() const { - return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4; -} - //===----------------------------------------------------------------------===// // COFF //===----------------------------------------------------------------------===// -void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx, - const TargetMachine &TM) { - TargetLoweringObjectFile::Initialize(Ctx, TM); - TextSection = - getContext().getCOFFSection(".text", - COFF::IMAGE_SCN_CNT_CODE | - COFF::IMAGE_SCN_MEM_EXECUTE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getText()); - DataSection = - getContext().getCOFFSection(".data", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); - ReadOnlySection = - getContext().getCOFFSection(".rdata", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getReadOnly()); - StaticCtorSection = - getContext().getCOFFSection(".ctors", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); - StaticDtorSection = - getContext().getCOFFSection(".dtors", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); - - // FIXME: We're emitting LSDA info into a readonly section on COFF, even - // though it contains relocatable pointers. In PIC mode, this is probably a - // big runtime hit for C++ apps. Either the contents of the LSDA need to be - // adjusted or this should be a data section. - LSDASection = - getContext().getCOFFSection(".gcc_except_table", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getReadOnly()); - // Debug info. - DwarfAbbrevSection = - getContext().getCOFFSection(".debug_abbrev", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfInfoSection = - getContext().getCOFFSection(".debug_info", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfLineSection = - getContext().getCOFFSection(".debug_line", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfFrameSection = - getContext().getCOFFSection(".debug_frame", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfPubNamesSection = - getContext().getCOFFSection(".debug_pubnames", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfPubTypesSection = - getContext().getCOFFSection(".debug_pubtypes", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfStrSection = - getContext().getCOFFSection(".debug_str", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfLocSection = - getContext().getCOFFSection(".debug_loc", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfARangesSection = - getContext().getCOFFSection(".debug_aranges", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfRangesSection = - getContext().getCOFFSection(".debug_ranges", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfMacroInfoSection = - getContext().getCOFFSection(".debug_macinfo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - - DrectveSection = - getContext().getCOFFSection(".drectve", - COFF::IMAGE_SCN_LNK_INFO, - SectionKind::getMetadata()); - - PDataSection = - getContext().getCOFFSection(".pdata", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); - - XDataSection = - getContext().getCOFFSection(".xdata", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); -} - -const MCSection *TargetLoweringObjectFileCOFF::getEHFrameSection() const { - return getContext().getCOFFSection(".eh_frame", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); -} - -const MCSection *TargetLoweringObjectFileCOFF::getWin64EHFuncTableSection( - StringRef suffix) const { - if (suffix == "") - return PDataSection; - return getContext().getCOFFSection((".pdata"+suffix).str(), - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); -} - -const MCSection *TargetLoweringObjectFileCOFF::getWin64EHTableSection( - StringRef suffix) const { - if (suffix == "") - return XDataSection; - return getContext().getCOFFSection((".xdata"+suffix).str(), - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); -} - - static unsigned getCOFFSectionFlags(SectionKind K) { unsigned Flags = 0; @@ -1051,6 +714,11 @@ getCOFFSectionFlags(SectionKind K) { COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE; + else if (K.isThreadLocal()) + Flags |= + COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | + COFF::IMAGE_SCN_MEM_READ | + COFF::IMAGE_SCN_MEM_WRITE; else if (K.isReadOnly()) Flags |= COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | @@ -1064,49 +732,122 @@ getCOFFSectionFlags(SectionKind K) { return Flags; } -const MCSection *TargetLoweringObjectFileCOFF:: -getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const { - return getContext().getCOFFSection(GV->getSection(), - getCOFFSectionFlags(Kind), - Kind); +const MCSection *TargetLoweringObjectFileCOFF::getExplicitSectionGlobal( + const GlobalValue *GV, SectionKind Kind, Mangler &Mang, + const TargetMachine &TM) const { + int Selection = 0; + unsigned Characteristics = getCOFFSectionFlags(Kind); + StringRef Name = GV->getSection(); + StringRef COMDATSymName = ""; + if (GV->isWeakForLinker()) { + Selection = COFF::IMAGE_COMDAT_SELECT_ANY; + Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT; + MCSymbol *Sym = TM.getSymbol(GV, Mang); + COMDATSymName = Sym->getName(); + } + return getContext().getCOFFSection(Name, + Characteristics, + Kind, + COMDATSymName, + Selection); } -static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) { +static const char *getCOFFSectionNameForUniqueGlobal(SectionKind Kind) { if (Kind.isText()) - return ".text$"; + return ".text"; if (Kind.isBSS ()) - return ".bss$"; + return ".bss"; + if (Kind.isThreadLocal()) + return ".tls$"; if (Kind.isWriteable()) - return ".data$"; - return ".rdata$"; + return ".data"; + return ".rdata"; } const MCSection *TargetLoweringObjectFileCOFF:: SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const { - assert(!Kind.isThreadLocal() && "Doesn't support TLS"); + Mangler &Mang, const TargetMachine &TM) const { // If this global is linkonce/weak and the target handles this by emitting it // into a 'uniqued' section name, create and return the section now. if (GV->isWeakForLinker()) { - const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind); - SmallString<128> Name(Prefix, Prefix+strlen(Prefix)); - MCSymbol *Sym = Mang->getSymbol(GV); - Name.append(Sym->getName().begin() + 1, Sym->getName().end()); - + const char *Name = getCOFFSectionNameForUniqueGlobal(Kind); unsigned Characteristics = getCOFFSectionFlags(Kind); Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT; - - return getContext().getCOFFSection(Name.str(), Characteristics, - COFF::IMAGE_COMDAT_SELECT_ANY, Kind); + MCSymbol *Sym = TM.getSymbol(GV, Mang); + return getContext().getCOFFSection(Name, Characteristics, + Kind, Sym->getName(), + COFF::IMAGE_COMDAT_SELECT_ANY); } if (Kind.isText()) - return getTextSection(); + return TextSection; + + if (Kind.isThreadLocal()) + return TLSDataSection; + + if (Kind.isReadOnly()) + return ReadOnlySection; + + if (Kind.isBSS()) + return BSSSection; - return getDataSection(); + return DataSection; } +StringRef TargetLoweringObjectFileCOFF:: +getDepLibFromLinkerOpt(StringRef LinkerOption) const { + const char *LibCmd = "/DEFAULTLIB:"; + if (LinkerOption.startswith(LibCmd)) + return LinkerOption.substr(strlen(LibCmd)); + return StringRef(); +} + +void TargetLoweringObjectFileCOFF:: +emitModuleFlags(MCStreamer &Streamer, + ArrayRef ModuleFlags, + Mangler &Mang, const TargetMachine &TM) const { + MDNode *LinkerOptions = 0; + + // Look for the "Linker Options" flag, since it's the only one we support. + for (ArrayRef::iterator + i = ModuleFlags.begin(), e = ModuleFlags.end(); i != e; ++i) { + const Module::ModuleFlagEntry &MFE = *i; + StringRef Key = MFE.Key->getString(); + Value *Val = MFE.Val; + if (Key == "Linker Options") { + LinkerOptions = cast(Val); + break; + } + } + if (!LinkerOptions) + return; + + // Emit the linker options to the linker .drectve section. According to the + // spec, this section is a space-separated string containing flags for linker. + const MCSection *Sec = getDrectveSection(); + Streamer.SwitchSection(Sec); + for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) { + MDNode *MDOptions = cast(LinkerOptions->getOperand(i)); + for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) { + MDString *MDOption = cast(MDOptions->getOperand(ii)); + StringRef Op = MDOption->getString(); + // Lead with a space for consistency with our dllexport implementation. + std::string Escaped(" "); + if (Op.find(" ") != StringRef::npos) { + // The PE-COFF spec says args with spaces must be quoted. It doesn't say + // how to escape quotes, but it probably uses this algorithm: + // http://msdn.microsoft.com/en-us/library/17w5ykft(v=vs.85).aspx + // FIXME: Reuse escaping code from Support/Windows/Program.inc + Escaped.push_back('\"'); + Escaped.append(Op); + Escaped.push_back('\"'); + } else { + Escaped.append(Op); + } + Streamer.EmitBytes(Escaped); + } + } +}