X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FWinCOFFStreamer.cpp;h=cb4e9b1c37b99c14618fe9d2fb158e797e8e4919;hb=6e08a410aa0a375450dfbdd3c1114aafc5fb1fb9;hp=1030cdb28d2cdfd1302b4689f25eb48d935f26fb;hpb=eb72dcaef7423069cf8f9e802fa8de64dc8f8f30;p=oota-llvm.git diff --git a/lib/MC/WinCOFFStreamer.cpp b/lib/MC/WinCOFFStreamer.cpp index 1030cdb28d2..cb4e9b1c37b 100644 --- a/lib/MC/WinCOFFStreamer.cpp +++ b/lib/MC/WinCOFFStreamer.cpp @@ -13,161 +13,287 @@ #define DEBUG_TYPE "WinCOFFStreamer" -#include "llvm/MC/MCObjectStreamer.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/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/MCWin64EH.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); +using namespace llvm; namespace { class WinCOFFStreamer : public MCObjectStreamer { public: + MCSymbol const *CurSymbol; + WinCOFFStreamer(MCContext &Context, - TargetAsmBackend &TAB, + MCAsmBackend &MAB, MCCodeEmitter &CE, raw_ostream &OS); + void AddCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment, bool External); + // MCStreamer interface + virtual void InitSections(); + virtual void InitToTextSection(); virtual void EmitLabel(MCSymbol *Symbol); + virtual void EmitDebugLabel(MCSymbol *Symbol); virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); - virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value); - virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute); + virtual void EmitThumbFunc(MCSymbol *Func); + virtual bool 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 EmitCOFFSectionIndex(MCSymbol const *Symbol); + virtual void EmitCOFFSecRel32(MCSymbol const *Symbol); 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); + unsigned ByteAlignment); + virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment); virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol, - unsigned Size,unsigned ByteAlignment); + uint64_t 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); + uint64_t Size, unsigned ByteAlignment); virtual void EmitFileDirective(StringRef Filename); - virtual void EmitDwarfFileDirective(unsigned FileNo,StringRef Filename); - virtual void EmitInstruction(const MCInst &Instruction); - virtual void Finish(); + virtual void EmitIdent(StringRef IdentString); + virtual void EmitWin64EHHandlerData(); + virtual void FinishImpl(); + +private: + virtual void EmitInstToData(const MCInst &Inst) { + MCDataFragment *DF = getOrCreateDataFragment(); + + SmallVector Fixups; + SmallString<256> Code; + raw_svector_ostream VecOS(Code); + getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups); + 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]); + } + DF->getContents().append(Code.begin(), Code.end()); + } + + const MCSectionCOFF *getSectionText() { + return getContext().getCOFFSection( + ".text", COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE | + COFF::IMAGE_SCN_MEM_READ, + SectionKind::getText()); + } + + const MCSectionCOFF *getSectionData() { + return getContext().getCOFFSection( + ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | + COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, + SectionKind::getDataRel()); + } + + const MCSectionCOFF *getSectionBSS() { + return getContext().getCOFFSection( + ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA | + COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, + SectionKind::getBSS()); + } + + void SetSectionText() { + SwitchSection(getSectionText()); + EmitCodeAlignment(4, 0); + } + + void SetSectionData() { + SwitchSection(getSectionData()); + EmitCodeAlignment(4, 0); + } + + void SetSectionBSS() { + SwitchSection(getSectionBSS()); + EmitCodeAlignment(4, 0); + } }; } // end anonymous namespace. -WinCOFFStreamer::WinCOFFStreamer(MCContext &Context, - TargetAsmBackend &TAB, - MCCodeEmitter &CE, - raw_ostream &OS) - : MCObjectStreamer(Context, TAB, OS, &CE) { +WinCOFFStreamer::WinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB, + MCCodeEmitter &CE, raw_ostream &OS) + : MCObjectStreamer(Context, 0, MAB, OS, &CE), CurSymbol(NULL) {} + +void WinCOFFStreamer::AddCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment, bool External) { + assert(!Symbol->isInSection() && "Symbol must not already have a section!"); + + const MCSectionCOFF *Section = getSectionBSS(); + MCSectionData &SectionData = getAssembler().getOrCreateSectionData(*Section); + if (SectionData.getAlignment() < ByteAlignment) + SectionData.setAlignment(ByteAlignment); + + MCSymbolData &SymbolData = getAssembler().getOrCreateSymbolData(*Symbol); + SymbolData.setExternal(External); + + AssignSection(Symbol, Section); + + if (ByteAlignment != 1) + new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, &SectionData); + + SymbolData.setFragment(new MCFillFragment(0, 0, Size, &SectionData)); } // MCStreamer interface +void WinCOFFStreamer::InitToTextSection() { + SetSectionText(); +} + +void WinCOFFStreamer::InitSections() { + SetSectionText(); + SetSectionData(); + SetSectionBSS(); + SetSectionText(); +} + void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) { + assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); + MCObjectStreamer::EmitLabel(Symbol); } +void WinCOFFStreamer::EmitDebugLabel(MCSymbol *Symbol) { + EmitLabel(Symbol); +} void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { - dbg_notimpl("Flag = " << Flag); + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { +void WinCOFFStreamer::EmitThumbFunc(MCSymbol *Func) { + llvm_unreachable("not implemented"); } -void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol, +bool WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) { + assert(Symbol && "Symbol must be non-null!"); + assert((Symbol->isInSection() + ? Symbol->getSection().getVariant() == MCSection::SV_COFF + : true) && "Got non-COFF section in the COFF backend!"); + switch (Attribute) { + case MCSA_WeakReference: + case MCSA_Weak: { + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + SD.modifyFlags(COFF::SF_WeakExternal, COFF::SF_WeakExternal); + SD.setExternal(true); + } + break; + + case MCSA_Global: + getAssembler().getOrCreateSymbolData(*Symbol).setExternal(true); + break; + + default: + return false; + } + + return true; } void WinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) { - dbg_notimpl("Symbol = " << Symbol->getName() << ", DescValue = "<< DescValue); + llvm_unreachable("not implemented"); } void WinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) { + assert((Symbol->isInSection() + ? Symbol->getSection().getVariant() == MCSection::SV_COFF + : true) && "Got non-COFF section in the COFF backend!"); + assert(CurSymbol == NULL && "EndCOFFSymbolDef must be called between calls " + "to BeginCOFFSymbolDef!"); + CurSymbol = Symbol; } void WinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) { + assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!"); + assert((StorageClass & ~0xFF) == 0 && "StorageClass must only have data in " + "the first byte!"); + + getAssembler().getOrCreateSymbolData(*CurSymbol).modifyFlags( + StorageClass << COFF::SF_ClassShift, + COFF::SF_ClassMask); } void WinCOFFStreamer::EmitCOFFSymbolType(int Type) { + assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!"); + assert((Type & ~0xFFFF) == 0 && "Type must only have data in the first 2 " + "bytes"); + + getAssembler().getOrCreateSymbolData(*CurSymbol).modifyFlags( + Type << COFF::SF_TypeShift, + COFF::SF_TypeMask); } void WinCOFFStreamer::EndCOFFSymbolDef() { + assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!"); + CurSymbol = NULL; +} + +void WinCOFFStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) { + MCDataFragment *DF = getOrCreateDataFragment(); + DF->getFixups().push_back(MCFixup::Create( + DF->getContents().size(), MCSymbolRefExpr::Create(Symbol, getContext()), + FK_SecRel_2)); + DF->getContents().resize(DF->getContents().size() + 4, 0); +} + +void WinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { + MCDataFragment *DF = getOrCreateDataFragment(); + DF->getFixups().push_back(MCFixup::Create( + DF->getContents().size(), MCSymbolRefExpr::Create(Symbol, getContext()), + FK_SecRel_4)); + DF->getContents().resize(DF->getContents().size() + 4, 0); } void WinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { - dbg_notimpl("Symbol = " << Symbol->getName() << ", Value = " << *Value); + llvm_unreachable("not implemented"); } void WinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment) { + unsigned ByteAlignment) { + assert((Symbol->isInSection() + ? Symbol->getSection().getVariant() == MCSection::SV_COFF + : true) && "Got non-COFF section in the COFF backend!"); + AddCommonSymbol(Symbol, Size, ByteAlignment, true); } -void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) { +void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + assert((Symbol->isInSection() + ? Symbol->getSection().getVariant() == MCSection::SV_COFF + : true) && "Got non-COFF section in the COFF backend!"); + AddCommonSymbol(Symbol, Size, ByteAlignment, false); } void WinCOFFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol, - unsigned Size,unsigned ByteAlignment) { - MCSectionCOFF const *SectionCOFF = - static_cast(Section); - - dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " << - Symbol->getName() << ", Size = " << Size << ", ByteAlignment = " - << ByteAlignment); + uint64_t Size,unsigned ByteAlignment) { + llvm_unreachable("not implemented"); } void WinCOFFStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) { - MCSectionCOFF const *SectionCOFF = - static_cast(Section); - - dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " << - Symbol->getName() << ", Size = " << Size << ", ByteAlignment = " - << ByteAlignment); -} - -void WinCOFFStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) { -} - -void WinCOFFStreamer::EmitValue(const MCExpr *Value, unsigned Size, - unsigned AddrSpace) { -} - -void WinCOFFStreamer::EmitGPRel32Value(const MCExpr *Value) { - dbg_notimpl("Value = '" << *Value); -} - -void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment, - int64_t Value, - unsigned ValueSize, - unsigned MaxBytesToEmit) { -} - -void WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment, - unsigned MaxBytesToEmit = 0) { -} - -void WinCOFFStreamer::EmitValueToOffset(const MCExpr *Offset, - unsigned char Value = 0) { - dbg_notimpl("Offset = '" << *Offset << "', Value = " << Value); + llvm_unreachable("not implemented"); } void WinCOFFStreamer::EmitFileDirective(StringRef Filename) { @@ -175,24 +301,34 @@ void WinCOFFStreamer::EmitFileDirective(StringRef Filename) { // info will be a much large effort. } -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 WinCOFFStreamer::EmitIdent(StringRef IdentString) { + llvm_unreachable("unsupported directive"); } -void WinCOFFStreamer::EmitInstruction(const MCInst &Instruction) { +void WinCOFFStreamer::EmitWin64EHHandlerData() { + MCStreamer::EmitWin64EHHandlerData(); + + // We have to emit the unwind info now, because this directive + // actually switches to the .xdata section! + MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo()); } -void WinCOFFStreamer::Finish() { - MCObjectStreamer::Finish(); +void WinCOFFStreamer::FinishImpl() { + EmitFrames(NULL, true); + EmitW64Tables(); + MCObjectStreamer::FinishImpl(); } namespace llvm { MCStreamer *createWinCOFFStreamer(MCContext &Context, - TargetAsmBackend &TAB, + MCAsmBackend &MAB, MCCodeEmitter &CE, - raw_ostream &OS) { - return new WinCOFFStreamer(Context, TAB, CE, OS); + raw_ostream &OS, + bool RelaxAll) { + WinCOFFStreamer *S = new WinCOFFStreamer(Context, MAB, CE, OS); + S->getAssembler().setRelaxAll(RelaxAll); + return S; } }