X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCStreamer.cpp;h=011969a3da01662da2e4f359a186bd49623a33bc;hb=d99ce2f6305eb090d47188bb041c960413fc3aa1;hp=77e3d4cea35d336ac3c21a8941a3f12bc4a80bdd;hpb=d04a8d4b33ff316ca4cf961e06c9e312eff8e64f;p=oota-llvm.git diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp index 77e3d4cea35..011969a3da0 100644 --- a/lib/MC/MCStreamer.cpp +++ b/lib/MC/MCStreamer.cpp @@ -10,50 +10,54 @@ #include "llvm/MC/MCStreamer.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/Twine.h" +#include "llvm/MC/MCAsmBackend.h" #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCInst.h" +#include "llvm/MC/MCObjectFileInfo.h" #include "llvm/MC/MCObjectWriter.h" +#include "llvm/MC/MCSection.h" #include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCWin64EH.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/LEB128.h" #include "llvm/Support/raw_ostream.h" #include using namespace llvm; -MCStreamer::MCStreamer(MCContext &Ctx) - : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false), - CurrentW64UnwindInfo(0), LastSymbol(0) { - const MCSection *section = NULL; - SectionStack.push_back(std::make_pair(section, section)); -} +// Pin the vtables to this file. +MCTargetStreamer::~MCTargetStreamer() {} -MCStreamer::~MCStreamer() { - for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i) - delete W64UnwindInfos[i]; +MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) { + S.setTargetStreamer(this); } -const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context, - const MCSymbol *A, - const MCSymbol *B) { - MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; - const MCExpr *ARef = - MCSymbolRefExpr::Create(A, Variant, Context); - const MCExpr *BRef = - MCSymbolRefExpr::Create(B, Variant, Context); - const MCExpr *AddrDelta = - MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context); - return AddrDelta; +void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {} + +void MCTargetStreamer::finish() {} + +void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {} + +MCStreamer::MCStreamer(MCContext &Ctx) + : Context(Ctx), CurrentWinFrameInfo(nullptr) { + SectionStack.push_back(std::pair()); } -const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) { - if (Context.getAsmInfo().hasAggressiveSymbolFolding() || - isa(Expr)) - return Expr; +MCStreamer::~MCStreamer() { + for (unsigned i = 0; i < getNumWinFrameInfos(); ++i) + delete WinFrameInfos[i]; +} - MCSymbol *ABS = Context.CreateTempSymbol(); - EmitAssignment(ABS, Expr); - return MCSymbolRefExpr::Create(ABS, Context); +void MCStreamer::reset() { + DwarfFrameInfos.clear(); + for (unsigned i = 0; i < getNumWinFrameInfos(); ++i) + delete WinFrameInfos[i]; + WinFrameInfos.clear(); + CurrentWinFrameInfo = nullptr; + SymbolOrdering.clear(); + SectionStack.clear(); + SectionStack.push_back(std::pair()); } raw_ostream &MCStreamer::GetCommentOS() { @@ -61,69 +65,61 @@ raw_ostream &MCStreamer::GetCommentOS() { return nulls(); } -void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta, - const MCSymbol *Label, int PointerSize) { - // emit the sequence to set the address - EmitIntValue(dwarf::DW_LNS_extended_op, 1); - EmitULEB128IntValue(PointerSize + 1); - EmitIntValue(dwarf::DW_LNE_set_address, 1); - EmitSymbolValue(Label, PointerSize); +void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {} - // emit the sequence for the LineDelta (from 1) and a zero address delta. - MCDwarfLineAddr::Emit(this, LineDelta, 0); +void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) { + for (auto &FI : DwarfFrameInfos) + FI.CompactUnwindEncoding = + (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0); } /// EmitIntValue - Special case of EmitValue that avoids the client having to /// pass in a MCExpr for constant integers. -void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size, - unsigned AddrSpace) { - assert(Size <= 8 && "Invalid size"); +void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) { + assert(1 <= Size && Size <= 8 && "Invalid size"); assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) && "Invalid size"); char buf[8]; - const bool isLittleEndian = Context.getAsmInfo().isLittleEndian(); + const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian(); for (unsigned i = 0; i != Size; ++i) { unsigned index = isLittleEndian ? i : (Size - i - 1); buf[i] = uint8_t(Value >> (index * 8)); } - EmitBytes(StringRef(buf, Size), AddrSpace); + EmitBytes(StringRef(buf, Size)); } /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the /// client having to pass in a MCExpr for constant integers. -void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace, - unsigned Padding) { +void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) { SmallString<128> Tmp; raw_svector_ostream OSE(Tmp); encodeULEB128(Value, OSE, Padding); - EmitBytes(OSE.str(), AddrSpace); + EmitBytes(OSE.str()); } /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the /// client having to pass in a MCExpr for constant integers. -void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) { +void MCStreamer::EmitSLEB128IntValue(int64_t Value) { SmallString<128> Tmp; raw_svector_ostream OSE(Tmp); encodeSLEB128(Value, OSE); - EmitBytes(OSE.str(), AddrSpace); -} - -void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size, - unsigned AddrSpace) { - const MCExpr *ABS = ForceExpAbs(Value); - EmitValue(ABS, Size, AddrSpace); + EmitBytes(OSE.str()); } - void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, - unsigned AddrSpace) { - EmitValueImpl(Value, Size, AddrSpace); + const SMLoc &Loc) { + EmitValueImpl(Value, Size, Loc); } void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, - unsigned AddrSpace) { - EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size, - AddrSpace); + bool IsSectionRelative) { + assert((!IsSectionRelative || Size == 4) && + "SectionRelative value requires 4-bytes"); + + if (!IsSectionRelative) + EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size); + else + EmitCOFFSecRel32(Sym); } void MCStreamer::EmitGPRel64Value(const MCExpr *Value) { @@ -136,17 +132,21 @@ void MCStreamer::EmitGPRel32Value(const MCExpr *Value) { /// EmitFill - Emit NumBytes bytes worth of the value specified by /// FillValue. This implements directives such as '.space'. -void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, - unsigned AddrSpace) { - const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); +void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) { + const MCExpr *E = MCConstantExpr::create(FillValue, getContext()); for (uint64_t i = 0, e = NumBytes; i != e; ++i) - EmitValue(E, 1, AddrSpace); + EmitValue(E, 1); } -bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo, - StringRef Directory, - StringRef Filename) { - return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0; +/// The implementation in this class just redirects to EmitFill. +void MCStreamer::EmitZeros(uint64_t NumBytes) { + EmitFill(NumBytes, 0); +} + +unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo, + StringRef Directory, + StringRef Filename, unsigned CUID) { + return getContext().getDwarfFile(Directory, Filename, FileNo, CUID); } void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, @@ -158,14 +158,24 @@ void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, Discriminator); } -MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() { - if (FrameInfos.empty()) - return NULL; - return &FrameInfos.back(); +MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) { + MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID); + if (!Table.getLabel()) { + StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix(); + Table.setLabel( + Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID))); + } + return Table.getLabel(); +} + +MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() { + if (DwarfFrameInfos.empty()) + return nullptr; + return &DwarfFrameInfos.back(); } -void MCStreamer::EnsureValidFrame() { - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); +void MCStreamer::EnsureValidDwarfFrame() { + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); if (!CurFrame || CurFrame->End) report_fatal_error("No open frame"); } @@ -174,69 +184,75 @@ void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol) { } +void MCStreamer::InitSections(bool NoExecStack) { + SwitchSection(getContext().getObjectFileInfo()->getTextSection()); +} + +void MCStreamer::AssignSection(MCSymbol *Symbol, MCSection *Section) { + if (Section) + Symbol->setSection(*Section); + else + Symbol->setUndefined(); + + // As we emit symbols into a section, track the order so that they can + // be sorted upon later. Zero is reserved to mean 'unemitted'. + SymbolOrdering[Symbol] = 1 + SymbolOrdering.size(); +} + void MCStreamer::EmitLabel(MCSymbol *Symbol) { assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); - assert(getCurrentSection() && "Cannot emit before setting section!"); - Symbol->setSection(*getCurrentSection()); - LastSymbol = Symbol; -} + assert(getCurrentSection().first && "Cannot emit before setting section!"); + AssignSection(Symbol, getCurrentSection().first); -void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) { - EnsureValidFrame(); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); - CurFrame->CompactUnwindEncoding = CompactUnwindEncoding; + MCTargetStreamer *TS = getTargetStreamer(); + if (TS) + TS->emitLabel(Symbol); } void MCStreamer::EmitCFISections(bool EH, bool Debug) { assert(EH || Debug); - EmitEHFrame = EH; - EmitDebugFrame = Debug; } -void MCStreamer::EmitCFIStartProc() { - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); +void MCStreamer::EmitCFIStartProc(bool IsSimple) { + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); if (CurFrame && !CurFrame->End) report_fatal_error("Starting a frame before finishing the previous one!"); MCDwarfFrameInfo Frame; + Frame.IsSimple = IsSimple; EmitCFIStartProcImpl(Frame); - FrameInfos.push_back(Frame); -} + const MCAsmInfo* MAI = Context.getAsmInfo(); + if (MAI) { + for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) { + if (Inst.getOperation() == MCCFIInstruction::OpDefCfa || + Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) { + Frame.CurrentCfaRegister = Inst.getRegister(); + } + } + } -void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { + DwarfFrameInfos.push_back(Frame); } -void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) { - Frame.Function = LastSymbol; - // If the function is externally visible, we need to create a local - // symbol to avoid relocations. - StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix(); - if (LastSymbol && LastSymbol->getName().startswith(Prefix)) { - Frame.Begin = LastSymbol; - } else { - Frame.Begin = getContext().CreateTempSymbol(); - EmitLabel(Frame.Begin); - } +void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { } void MCStreamer::EmitCFIEndProc() { - EnsureValidFrame(); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + EnsureValidDwarfFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); EmitCFIEndProcImpl(*CurFrame); } void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { -} - -void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) { - Frame.End = getContext().CreateTempSymbol(); - EmitLabel(Frame.End); + // Put a dummy non-null value in Frame.End to mark that this frame has been + // closed. + Frame.End = (MCSymbol *) 1; } MCSymbol *MCStreamer::EmitCFICommon() { - EnsureValidFrame(); - MCSymbol *Label = getContext().CreateTempSymbol(); + EnsureValidDwarfFrame(); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); return Label; } @@ -245,15 +261,16 @@ void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createDefCfa(Label, Register, Offset); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); + CurFrame->CurrentCfaRegister = static_cast(Register); } void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createDefCfaOffset(Label, Offset); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -261,7 +278,7 @@ void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -269,15 +286,16 @@ void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createDefCfaRegister(Label, Register); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); + CurFrame->CurrentCfaRegister = static_cast(Register); } void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createOffset(Label, Register, Offset); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -285,21 +303,21 @@ void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createRelOffset(Label, Register, Offset); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) { - EnsureValidFrame(); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + EnsureValidDwarfFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Personality = Sym; CurFrame->PersonalityEncoding = Encoding; } void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { - EnsureValidFrame(); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + EnsureValidDwarfFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Lsda = Sym; CurFrame->LsdaEncoding = Encoding; } @@ -307,7 +325,7 @@ void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { void MCStreamer::EmitCFIRememberState() { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -315,7 +333,7 @@ void MCStreamer::EmitCFIRestoreState() { // FIXME: Error if there is no matching cfi_remember_state. MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -323,7 +341,7 @@ void MCStreamer::EmitCFISameValue(int64_t Register) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createSameValue(Label, Register); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -331,20 +349,20 @@ void MCStreamer::EmitCFIRestore(int64_t Register) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createRestore(Label, Register); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } void MCStreamer::EmitCFIEscape(StringRef Values) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } void MCStreamer::EmitCFISignalFrame() { - EnsureValidFrame(); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + EnsureValidDwarfFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->IsSignalFrame = true; } @@ -352,7 +370,7 @@ void MCStreamer::EmitCFIUndefined(int64_t Register) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createUndefined(Label, Register); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } @@ -360,212 +378,196 @@ void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = MCCFIInstruction::createRegister(Label, Register1, Register2); - MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); CurFrame->Instructions.push_back(Instruction); } -void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) { - W64UnwindInfos.push_back(Frame); - CurrentW64UnwindInfo = W64UnwindInfos.back(); +void MCStreamer::EmitCFIWindowSave() { + MCSymbol *Label = EmitCFICommon(); + MCCFIInstruction Instruction = + MCCFIInstruction::createWindowSave(Label); + MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo(); + CurFrame->Instructions.push_back(Instruction); } -void MCStreamer::EnsureValidW64UnwindInfo() { - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (!CurFrame || CurFrame->End) +void MCStreamer::EnsureValidWinFrameInfo() { + const MCAsmInfo *MAI = Context.getAsmInfo(); + if (!MAI->usesWindowsCFI()) + report_fatal_error(".seh_* directives are not supported on this target"); + if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End) report_fatal_error("No open Win64 EH frame function!"); } -void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) { - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (CurFrame && !CurFrame->End) +void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) { + const MCAsmInfo *MAI = Context.getAsmInfo(); + if (!MAI->usesWindowsCFI()) + report_fatal_error(".seh_* directives are not supported on this target"); + if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End) report_fatal_error("Starting a function before ending the previous one!"); - MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; - Frame->Begin = getContext().CreateTempSymbol(); - Frame->Function = Symbol; - EmitLabel(Frame->Begin); - setCurrentW64UnwindInfo(Frame); + + MCSymbol *StartProc = getContext().createTempSymbol(); + EmitLabel(StartProc); + + WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc)); + CurrentWinFrameInfo = WinFrameInfos.back(); } -void MCStreamer::EmitWin64EHEndProc() { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (CurFrame->ChainedParent) +void MCStreamer::EmitWinCFIEndProc() { + EnsureValidWinFrameInfo(); + if (CurrentWinFrameInfo->ChainedParent) report_fatal_error("Not all chained regions terminated!"); - CurFrame->End = getContext().CreateTempSymbol(); - EmitLabel(CurFrame->End); + + MCSymbol *Label = getContext().createTempSymbol(); + EmitLabel(Label); + CurrentWinFrameInfo->End = Label; } -void MCStreamer::EmitWin64EHStartChained() { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - Frame->Begin = getContext().CreateTempSymbol(); - Frame->Function = CurFrame->Function; - Frame->ChainedParent = CurFrame; - EmitLabel(Frame->Begin); - setCurrentW64UnwindInfo(Frame); +void MCStreamer::EmitWinCFIStartChained() { + EnsureValidWinFrameInfo(); + + MCSymbol *StartProc = getContext().createTempSymbol(); + EmitLabel(StartProc); + + WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function, + StartProc, CurrentWinFrameInfo)); + CurrentWinFrameInfo = WinFrameInfos.back(); } -void MCStreamer::EmitWin64EHEndChained() { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (!CurFrame->ChainedParent) +void MCStreamer::EmitWinCFIEndChained() { + EnsureValidWinFrameInfo(); + if (!CurrentWinFrameInfo->ChainedParent) report_fatal_error("End of a chained region outside a chained region!"); - CurFrame->End = getContext().CreateTempSymbol(); - EmitLabel(CurFrame->End); - CurrentW64UnwindInfo = CurFrame->ChainedParent; + + MCSymbol *Label = getContext().createTempSymbol(); + EmitLabel(Label); + + CurrentWinFrameInfo->End = Label; + CurrentWinFrameInfo = + const_cast(CurrentWinFrameInfo->ChainedParent); } -void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, - bool Except) { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (CurFrame->ChainedParent) +void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, + bool Except) { + EnsureValidWinFrameInfo(); + if (CurrentWinFrameInfo->ChainedParent) report_fatal_error("Chained unwind areas can't have handlers!"); - CurFrame->ExceptionHandler = Sym; + CurrentWinFrameInfo->ExceptionHandler = Sym; if (!Except && !Unwind) report_fatal_error("Don't know what kind of handler this is!"); if (Unwind) - CurFrame->HandlesUnwind = true; + CurrentWinFrameInfo->HandlesUnwind = true; if (Except) - CurFrame->HandlesExceptions = true; + CurrentWinFrameInfo->HandlesExceptions = true; } -void MCStreamer::EmitWin64EHHandlerData() { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (CurFrame->ChainedParent) +void MCStreamer::EmitWinEHHandlerData() { + EnsureValidWinFrameInfo(); + if (CurrentWinFrameInfo->ChainedParent) report_fatal_error("Chained unwind areas can't have handlers!"); } -void MCStreamer::EmitWin64EHPushReg(unsigned Register) { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCSymbol *Label = getContext().CreateTempSymbol(); - MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register); +void MCStreamer::EmitWinCFIPushReg(unsigned Register) { + EnsureValidWinFrameInfo(); + + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); - CurFrame->Instructions.push_back(Inst); + + WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register); + CurrentWinFrameInfo->Instructions.push_back(Inst); } -void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (CurFrame->LastFrameInst >= 0) +void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) { + EnsureValidWinFrameInfo(); + if (CurrentWinFrameInfo->LastFrameInst >= 0) report_fatal_error("Frame register and offset already specified!"); if (Offset & 0x0F) report_fatal_error("Misaligned frame pointer offset!"); - MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset); - CurFrame->LastFrameInst = CurFrame->Instructions.size(); - CurFrame->Instructions.push_back(Inst); + if (Offset > 240) + report_fatal_error("Frame offset must be less than or equal to 240!"); + + MCSymbol *Label = getContext().createTempSymbol(); + EmitLabel(Label); + + WinEH::Instruction Inst = + Win64EH::Instruction::SetFPReg(Label, Register, Offset); + CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size(); + CurrentWinFrameInfo->Instructions.push_back(Inst); } -void MCStreamer::EmitWin64EHAllocStack(unsigned Size) { - EnsureValidW64UnwindInfo(); +void MCStreamer::EmitWinCFIAllocStack(unsigned Size) { + EnsureValidWinFrameInfo(); + if (Size == 0) + report_fatal_error("Allocation size must be non-zero!"); if (Size & 7) report_fatal_error("Misaligned stack allocation!"); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCSymbol *Label = getContext().CreateTempSymbol(); - MCWin64EHInstruction Inst(Label, Size); + + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); - CurFrame->Instructions.push_back(Inst); + + WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size); + CurrentWinFrameInfo->Instructions.push_back(Inst); } -void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) { - EnsureValidW64UnwindInfo(); +void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) { + EnsureValidWinFrameInfo(); if (Offset & 7) report_fatal_error("Misaligned saved register offset!"); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCSymbol *Label = getContext().CreateTempSymbol(); - MCWin64EHInstruction Inst( - Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol, - Label, Register, Offset); + + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); - CurFrame->Instructions.push_back(Inst); + + WinEH::Instruction Inst = + Win64EH::Instruction::SaveNonVol(Label, Register, Offset); + CurrentWinFrameInfo->Instructions.push_back(Inst); } -void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) { - EnsureValidW64UnwindInfo(); +void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) { + EnsureValidWinFrameInfo(); if (Offset & 0x0F) report_fatal_error("Misaligned saved vector register offset!"); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCSymbol *Label = getContext().CreateTempSymbol(); - MCWin64EHInstruction Inst( - Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128, - Label, Register, Offset); - EmitLabel(Label); - CurFrame->Instructions.push_back(Inst); -} -void MCStreamer::EmitWin64EHPushFrame(bool Code) { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - if (CurFrame->Instructions.size() > 0) - report_fatal_error("If present, PushMachFrame must be the first UOP"); - MCSymbol *Label = getContext().CreateTempSymbol(); - MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code); + MCSymbol *Label = getContext().createTempSymbol(); EmitLabel(Label); - CurFrame->Instructions.push_back(Inst); -} -void MCStreamer::EmitWin64EHEndProlog() { - EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - CurFrame->PrologEnd = getContext().CreateTempSymbol(); - EmitLabel(CurFrame->PrologEnd); + WinEH::Instruction Inst = + Win64EH::Instruction::SaveXMM(Label, Register, Offset); + CurrentWinFrameInfo->Instructions.push_back(Inst); } -void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { - llvm_unreachable("This file format doesn't support this directive"); -} +void MCStreamer::EmitWinCFIPushFrame(bool Code) { + EnsureValidWinFrameInfo(); + if (CurrentWinFrameInfo->Instructions.size() > 0) + report_fatal_error("If present, PushMachFrame must be the first UOP"); -void MCStreamer::EmitFnStart() { - errs() << "Not implemented yet\n"; - abort(); -} + MCSymbol *Label = getContext().createTempSymbol(); + EmitLabel(Label); -void MCStreamer::EmitFnEnd() { - errs() << "Not implemented yet\n"; - abort(); + WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code); + CurrentWinFrameInfo->Instructions.push_back(Inst); } -void MCStreamer::EmitCantUnwind() { - errs() << "Not implemented yet\n"; - abort(); -} +void MCStreamer::EmitWinCFIEndProlog() { + EnsureValidWinFrameInfo(); -void MCStreamer::EmitHandlerData() { - errs() << "Not implemented yet\n"; - abort(); -} + MCSymbol *Label = getContext().createTempSymbol(); + EmitLabel(Label); -void MCStreamer::EmitPersonality(const MCSymbol *Personality) { - errs() << "Not implemented yet\n"; - abort(); + CurrentWinFrameInfo->PrologEnd = Label; } -void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) { - errs() << "Not implemented yet\n"; - abort(); +void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) { } -void MCStreamer::EmitPad(int64_t Offset) { - errs() << "Not implemented yet\n"; - abort(); +void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) { } -void MCStreamer::EmitRegSave(const SmallVectorImpl &RegList, bool) { - errs() << "Not implemented yet\n"; - abort(); -} - -void MCStreamer::EmitTCEntry(const MCSymbol &S) { - llvm_unreachable("Unsupported method"); +void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { } /// EmitRawText - If this file is backed by an assembly streamer, this dumps /// the specified string in the output .s file. This capability is /// indicated by the hasRawTextSupport() predicate. -void MCStreamer::EmitRawText(StringRef String) { +void MCStreamer::EmitRawTextImpl(StringRef String) { errs() << "EmitRawText called on an MCStreamer that doesn't support it, " " something must not be fully mc'ized\n"; abort(); @@ -573,31 +575,126 @@ void MCStreamer::EmitRawText(StringRef String) { void MCStreamer::EmitRawText(const Twine &T) { SmallString<128> Str; - T.toVector(Str); - EmitRawText(Str.str()); + EmitRawTextImpl(T.toStringRef(Str)); } -void MCStreamer::EmitFrames(bool usingCFI) { - if (!getNumFrameInfos()) - return; +void MCStreamer::EmitWindowsUnwindTables() { +} + +void MCStreamer::Finish() { + if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End) + report_fatal_error("Unfinished frame!"); - if (EmitEHFrame) - MCDwarfFrameEmitter::Emit(*this, usingCFI, true); + MCTargetStreamer *TS = getTargetStreamer(); + if (TS) + TS->finish(); - if (EmitDebugFrame) - MCDwarfFrameEmitter::Emit(*this, usingCFI, false); + FinishImpl(); } -void MCStreamer::EmitW64Tables() { - if (!getNumW64UnwindInfos()) - return; +void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { + visitUsedExpr(*Value); + Symbol->setVariableValue(Value); - MCWin64EHUnwindEmitter::Emit(*this); + MCTargetStreamer *TS = getTargetStreamer(); + if (TS) + TS->emitAssignment(Symbol, Value); } -void MCStreamer::Finish() { - if (!FrameInfos.empty() && !FrameInfos.back().End) - report_fatal_error("Unfinished frame!"); +void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) { +} - FinishImpl(); +void MCStreamer::visitUsedExpr(const MCExpr &Expr) { + switch (Expr.getKind()) { + case MCExpr::Target: + cast(Expr).visitUsedExpr(*this); + break; + + case MCExpr::Constant: + break; + + case MCExpr::Binary: { + const MCBinaryExpr &BE = cast(Expr); + visitUsedExpr(*BE.getLHS()); + visitUsedExpr(*BE.getRHS()); + break; + } + + case MCExpr::SymbolRef: + visitUsedSymbol(cast(Expr).getSymbol()); + break; + + case MCExpr::Unary: + visitUsedExpr(*cast(Expr).getSubExpr()); + break; + } +} + +void MCStreamer::EmitInstruction(const MCInst &Inst, + const MCSubtargetInfo &STI) { + // Scan for values. + for (unsigned i = Inst.getNumOperands(); i--;) + if (Inst.getOperand(i).isExpr()) + visitUsedExpr(*Inst.getOperand(i).getExpr()); +} + +void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {} +void MCStreamer::EmitThumbFunc(MCSymbol *Func) {} +void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {} +void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {} +void MCStreamer::EndCOFFSymbolDef() {} +void MCStreamer::EmitFileDirective(StringRef Filename) {} +void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {} +void MCStreamer::EmitCOFFSymbolType(int Type) {} +void MCStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {} +void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) {} +void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, + uint64_t Size, unsigned ByteAlignment) {} +void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {} +void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {} +void MCStreamer::EmitBytes(StringRef Data) {} +void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, + const SMLoc &Loc) { + visitUsedExpr(*Value); +} +void MCStreamer::EmitULEB128Value(const MCExpr *Value) {} +void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {} +void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value, + unsigned ValueSize, + unsigned MaxBytesToEmit) {} +void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment, + unsigned MaxBytesToEmit) {} +bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) { + return false; +} +void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {} +void MCStreamer::EmitBundleLock(bool AlignToEnd) {} +void MCStreamer::FinishImpl() {} +void MCStreamer::EmitBundleUnlock() {} + +void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) { + assert(Section && "Cannot switch to a null section!"); + MCSectionSubPair curSection = SectionStack.back().first; + SectionStack.back().second = curSection; + if (MCSectionSubPair(Section, Subsection) != curSection) { + ChangeSection(Section, Subsection); + SectionStack.back().first = MCSectionSubPair(Section, Subsection); + assert(!Section->hasEnded() && "Section already ended"); + MCSymbol *Sym = Section->getBeginSymbol(); + if (Sym && !Sym->isInSection()) + EmitLabel(Sym); + } +} + +MCSymbol *MCStreamer::endSection(MCSection *Section) { + // TODO: keep track of the last subsection so that this symbol appears in the + // correct place. + MCSymbol *Sym = Section->getEndSymbol(Context); + if (Sym->isInSection()) + return Sym; + + SwitchSection(Section); + EmitLabel(Sym); + return Sym; }