X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FWinCOFFStreamer.cpp;h=1d03e2d742f02366f47fcd0cd714387f201a5a17;hb=f759032ccd3709dcd7362b0ed51760ee4e47025a;hp=1030cdb28d2cdfd1302b4689f25eb48d935f26fb;hpb=eb72dcaef7423069cf8f9e802fa8de64dc8f8f30;p=oota-llvm.git diff --git a/lib/MC/WinCOFFStreamer.cpp b/lib/MC/WinCOFFStreamer.cpp index 1030cdb28d2..1d03e2d742f 100644 --- a/lib/MC/WinCOFFStreamer.cpp +++ b/lib/MC/WinCOFFStreamer.cpp @@ -7,192 +7,247 @@ // //===----------------------------------------------------------------------===// // -// This file contains an implementation of a Win32 COFF object file streamer. +// This file contains an implementation of a Windows COFF object file streamer. // //===----------------------------------------------------------------------===// -#define DEBUG_TYPE "WinCOFFStreamer" - -#include "llvm/MC/MCObjectStreamer.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/MC/MCAsmBackend.h" +#include "llvm/MC/MCAsmLayout.h" +#include "llvm/MC/MCAssembler.h" +#include "llvm/MC/MCCodeEmitter.h" #include "llvm/MC/MCContext.h" -#include "llvm/MC/MCSection.h" -#include "llvm/MC/MCSymbol.h" #include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCCodeEmitter.h" +#include "llvm/MC/MCObjectFileInfo.h" +#include "llvm/MC/MCObjectStreamer.h" +#include "llvm/MC/MCSection.h" #include "llvm/MC/MCSectionCOFF.h" -#include "llvm/Target/TargetAsmBackend.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCValue.h" +#include "llvm/MC/MCWinCOFFStreamer.h" #include "llvm/Support/COFF.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/TargetRegistry.h" #include "llvm/Support/raw_ostream.h" + using namespace llvm; -#define dbg_notimpl(x) \ - do { dbgs() << "not implemented, " << __FUNCTION__ << " (" << x << ")"; \ - abort(); } while (false); +#define DEBUG_TYPE "WinCOFFStreamer" -namespace { -class WinCOFFStreamer : public MCObjectStreamer { -public: - WinCOFFStreamer(MCContext &Context, - TargetAsmBackend &TAB, - MCCodeEmitter &CE, - raw_ostream &OS); +namespace llvm { +MCWinCOFFStreamer::MCWinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB, + MCCodeEmitter &CE, raw_ostream &OS) + : MCObjectStreamer(Context, MAB, OS, &CE), CurSymbol(nullptr) {} + +void MCWinCOFFStreamer::EmitInstToData(const MCInst &Inst, + const MCSubtargetInfo &STI) { + MCDataFragment *DF = getOrCreateDataFragment(); + + SmallVector Fixups; + SmallString<256> Code; + raw_svector_ostream VecOS(Code); + getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups, STI); + VecOS.flush(); + + // Add the fixups and data. + for (unsigned i = 0, e = Fixups.size(); i != e; ++i) { + Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size()); + DF->getFixups().push_back(Fixups[i]); + } - // MCStreamer interface + DF->getContents().append(Code.begin(), Code.end()); +} - virtual void EmitLabel(MCSymbol *Symbol); - virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); - virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value); - virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute); - virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue); - virtual void BeginCOFFSymbolDef(MCSymbol const *Symbol); - virtual void EmitCOFFSymbolStorageClass(int StorageClass); - virtual void EmitCOFFSymbolType(int Type); - virtual void EndCOFFSymbolDef(); - virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value); - virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment); - virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size); - virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol, - unsigned Size,unsigned ByteAlignment); - virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, - uint64_t Size, unsigned ByteAlignment); - virtual void EmitBytes(StringRef Data, unsigned AddrSpace); - virtual void EmitValue(const MCExpr *Value, unsigned Size, - unsigned AddrSpace); - virtual void EmitGPRel32Value(const MCExpr *Value); - virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value, - unsigned ValueSize, unsigned MaxBytesToEmit); - virtual void EmitCodeAlignment(unsigned ByteAlignment, - unsigned MaxBytesToEmit); - virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value); - virtual void EmitFileDirective(StringRef Filename); - virtual void EmitDwarfFileDirective(unsigned FileNo,StringRef Filename); - virtual void EmitInstruction(const MCInst &Instruction); - virtual void Finish(); -}; -} // end anonymous namespace. +void MCWinCOFFStreamer::InitSections() { + // FIXME: this is identical to the ELF one. + // This emulates the same behavior of GNU as. This makes it easier + // to compare the output as the major sections are in the same order. + SwitchSection(getContext().getObjectFileInfo()->getTextSection()); + EmitCodeAlignment(4); -WinCOFFStreamer::WinCOFFStreamer(MCContext &Context, - TargetAsmBackend &TAB, - MCCodeEmitter &CE, - raw_ostream &OS) - : MCObjectStreamer(Context, TAB, OS, &CE) { -} + SwitchSection(getContext().getObjectFileInfo()->getDataSection()); + EmitCodeAlignment(4); -// MCStreamer interface + SwitchSection(getContext().getObjectFileInfo()->getBSSSection()); + EmitCodeAlignment(4); -void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) { + SwitchSection(getContext().getObjectFileInfo()->getTextSection()); } -void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { - dbg_notimpl("Flag = " << Flag); +void MCWinCOFFStreamer::EmitLabel(MCSymbol *Symbol) { + assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); + MCObjectStreamer::EmitLabel(Symbol); } -void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { +void MCWinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol, - MCSymbolAttr Attribute) { +void MCWinCOFFStreamer::EmitThumbFunc(MCSymbol *Func) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) { - dbg_notimpl("Symbol = " << Symbol->getName() << ", DescValue = "<< DescValue); -} +bool MCWinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol, + MCSymbolAttr Attribute) { + assert(Symbol && "Symbol must be non-null!"); + assert((!Symbol->isInSection() || + Symbol->getSection().getVariant() == MCSection::SV_COFF) && + "Got non-COFF section in the COFF backend!"); -void WinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) { -} + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); -void WinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) { -} + switch (Attribute) { + default: return false; + case MCSA_WeakReference: + case MCSA_Weak: + SD.modifyFlags(COFF::SF_WeakExternal, COFF::SF_WeakExternal); + SD.setExternal(true); + break; + case MCSA_Global: + SD.setExternal(true); + break; + } -void WinCOFFStreamer::EmitCOFFSymbolType(int Type) { + return true; } -void WinCOFFStreamer::EndCOFFSymbolDef() { +void MCWinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { - dbg_notimpl("Symbol = " << Symbol->getName() << ", Value = " << *Value); -} +void MCWinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) { + assert((!Symbol->isInSection() || + Symbol->getSection().getVariant() == MCSection::SV_COFF) && + "Got non-COFF section in the COFF backend!"); -void WinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment) { + if (CurSymbol) + FatalError("starting a new symbol definition without completing the " + "previous one"); + CurSymbol = Symbol; } -void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) { +void MCWinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) { + if (!CurSymbol) + FatalError("storage class specified outside of symbol definition"); + + if (StorageClass & ~0xff) + FatalError(Twine("storage class value '") + itostr(StorageClass) + + "' out of range"); + + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*CurSymbol); + SD.modifyFlags(StorageClass << COFF::SF_ClassShift, COFF::SF_ClassMask); } -void WinCOFFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol, - unsigned Size,unsigned ByteAlignment) { - MCSectionCOFF const *SectionCOFF = - static_cast(Section); +void MCWinCOFFStreamer::EmitCOFFSymbolType(int Type) { + if (!CurSymbol) + FatalError("symbol type specified outside of a symbol definition"); + + if (Type & ~0xffff) + FatalError(Twine("type value '") + itostr(Type) + "' out of range"); - dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " << - Symbol->getName() << ", Size = " << Size << ", ByteAlignment = " - << ByteAlignment); + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*CurSymbol); + SD.modifyFlags(Type << COFF::SF_TypeShift, COFF::SF_TypeMask); } -void WinCOFFStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, - uint64_t Size, unsigned ByteAlignment) { - MCSectionCOFF const *SectionCOFF = - static_cast(Section); +void MCWinCOFFStreamer::EndCOFFSymbolDef() { + if (!CurSymbol) + FatalError("ending symbol definition without starting one"); + CurSymbol = nullptr; +} - dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " << - Symbol->getName() << ", Size = " << Size << ", ByteAlignment = " - << ByteAlignment); +void MCWinCOFFStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) { + MCDataFragment *DF = getOrCreateDataFragment(); + const MCSymbolRefExpr *SRE = MCSymbolRefExpr::Create(Symbol, getContext()); + MCFixup Fixup = MCFixup::Create(DF->getContents().size(), SRE, FK_SecRel_2); + DF->getFixups().push_back(Fixup); + DF->getContents().resize(DF->getContents().size() + 4, 0); } -void WinCOFFStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) { +void MCWinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { + MCDataFragment *DF = getOrCreateDataFragment(); + const MCSymbolRefExpr *SRE = MCSymbolRefExpr::Create(Symbol, getContext()); + MCFixup Fixup = MCFixup::Create(DF->getContents().size(), SRE, FK_SecRel_4); + DF->getFixups().push_back(Fixup); + DF->getContents().resize(DF->getContents().size() + 4, 0); } -void WinCOFFStreamer::EmitValue(const MCExpr *Value, unsigned Size, - unsigned AddrSpace) { +void MCWinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { + llvm_unreachable("not supported"); } -void WinCOFFStreamer::EmitGPRel32Value(const MCExpr *Value) { - dbg_notimpl("Value = '" << *Value); +void MCWinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + assert((!Symbol->isInSection() || + Symbol->getSection().getVariant() == MCSection::SV_COFF) && + "Got non-COFF section in the COFF backend!"); + + if (ByteAlignment > 32) + report_fatal_error("alignment is limited to 32-bytes"); + + AssignSection(Symbol, nullptr); + + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + SD.setExternal(true); + SD.setCommon(Size, ByteAlignment); } -void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment, - int64_t Value, - unsigned ValueSize, - unsigned MaxBytesToEmit) { +void MCWinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + assert(!Symbol->isInSection() && "Symbol must not already have a section!"); + + const MCSection *Section = getContext().getObjectFileInfo()->getBSSSection(); + MCSectionData &SectionData = getAssembler().getOrCreateSectionData(*Section); + if (SectionData.getAlignment() < ByteAlignment) + SectionData.setAlignment(ByteAlignment); + + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + SD.setExternal(false); + + AssignSection(Symbol, Section); + + if (ByteAlignment != 1) + new MCAlignFragment(ByteAlignment, /*_Value=*/0, /*_ValueSize=*/0, + ByteAlignment, &SectionData); + + MCFillFragment *Fragment = + new MCFillFragment(/*_Value=*/0, /*_ValueSize=*/0, Size, &SectionData); + SD.setFragment(Fragment); } -void WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment, - unsigned MaxBytesToEmit = 0) { +void MCWinCOFFStreamer::EmitZerofill(const MCSection *Section, + MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitValueToOffset(const MCExpr *Offset, - unsigned char Value = 0) { - dbg_notimpl("Offset = '" << *Offset << "', Value = " << Value); +void MCWinCOFFStreamer::EmitTBSSSymbol(const MCSection *Section, + MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitFileDirective(StringRef Filename) { - // Ignore for now, linkers don't care, and proper debug - // info will be a much large effort. +void MCWinCOFFStreamer::EmitFileDirective(StringRef Filename) { + getAssembler().addFileName(Filename); } -void WinCOFFStreamer::EmitDwarfFileDirective(unsigned FileNo, - StringRef Filename) { - dbg_notimpl("FileNo = " << FileNo << ", Filename = '" << Filename << "'"); +// TODO: Implement this if you want to emit .comment section in COFF obj files. +void MCWinCOFFStreamer::EmitIdent(StringRef IdentString) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitInstruction(const MCInst &Instruction) { +void MCWinCOFFStreamer::EmitWinEHHandlerData() { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::Finish() { - MCObjectStreamer::Finish(); +void MCWinCOFFStreamer::FinishImpl() { + MCObjectStreamer::FinishImpl(); } -namespace llvm -{ - MCStreamer *createWinCOFFStreamer(MCContext &Context, - TargetAsmBackend &TAB, - MCCodeEmitter &CE, - raw_ostream &OS) { - return new WinCOFFStreamer(Context, TAB, CE, OS); - } +LLVM_ATTRIBUTE_NORETURN +void MCWinCOFFStreamer::FatalError(const Twine &Msg) const { + getContext().FatalError(SMLoc(), Msg); } +} +