X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCStreamer.cpp;h=0fbf3875f1a050a368e5d615835daff5f4c8b3de;hb=9e5887b17e634b98f7c1cf0ee4f25c218097d08e;hp=fcc338991f186747170c51c68972d00af2c391e0;hpb=c3b162857a587c9877e903f038471b882b213232;p=oota-llvm.git diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp index fcc338991f1..0fbf3875f1a 100644 --- a/lib/MC/MCStreamer.cpp +++ b/lib/MC/MCStreamer.cpp @@ -21,12 +21,16 @@ using namespace llvm; MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true), - EmitDebugFrame(false) { + EmitDebugFrame(false), + CurrentW64UnwindInfo(0), + LastSymbol(0) { const MCSection *section = NULL; SectionStack.push_back(std::make_pair(section, section)); } MCStreamer::~MCStreamer() { + for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i) + delete W64UnwindInfos[i]; } const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context, @@ -42,14 +46,14 @@ const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context, return AddrDelta; } -const MCExpr *MCStreamer::ForceExpAbs(MCStreamer *Streamer, - MCContext &Context, const MCExpr* Expr) { - if (Context.getAsmInfo().hasAggressiveSymbolFolding()) - return Expr; +const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) { + if (Context.getAsmInfo().hasAggressiveSymbolFolding() || + isa(Expr)) + return Expr; - MCSymbol *ABS = Context.CreateTempSymbol(); - Streamer->EmitAssignment(ABS, Expr); - return MCSymbolRefExpr::Create(ABS, Context); + MCSymbol *ABS = Context.CreateTempSymbol(); + EmitAssignment(ABS, Expr); + return MCSymbolRefExpr::Create(ABS, Context); } raw_ostream &MCStreamer::GetCommentOS() { @@ -77,9 +81,11 @@ void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size, assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) && "Invalid size"); char buf[8]; - // FIXME: Endianness assumption. - for (unsigned i = 0; i != Size; ++i) - buf[i] = uint8_t(Value >> (i * 8)); + 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); } @@ -103,13 +109,8 @@ void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) { void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size, unsigned AddrSpace) { - if (getContext().getAsmInfo().hasAggressiveSymbolFolding()) { - EmitValue(Value, Size, AddrSpace); - return; - } - MCSymbol *ABS = getContext().CreateTempSymbol(); - EmitAssignment(ABS, Value); - EmitSymbolValue(ABS, Size, AddrSpace); + const MCExpr *ABS = ForceExpAbs(Value); + EmitValue(ABS, Size, AddrSpace); } @@ -171,10 +172,13 @@ 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; +} - StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix(); - if (!Symbol->getName().startswith(Prefix)) - LastNonPrivate = Symbol; +void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + CurFrame->CompactUnwindEncoding = CompactUnwindEncoding; } void MCStreamer::EmitCFISections(bool EH, bool Debug) { @@ -187,10 +191,20 @@ void MCStreamer::EmitCFIStartProc() { MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); if (CurFrame && !CurFrame->End) report_fatal_error("Starting a frame before finishing the previous one!"); + MCDwarfFrameInfo Frame; - Frame.Begin = getContext().CreateTempSymbol(); - Frame.Function = LastNonPrivate; - EmitLabel(Frame.Begin); + 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); + } + FrameInfos.push_back(Frame); } @@ -311,8 +325,8 @@ void MCStreamer::EmitCFISameValue(int64_t Register) { } void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) { - W64UnwindInfos.push_back(*Frame); - CurrentW64UnwindInfo = &W64UnwindInfos.back(); + W64UnwindInfos.push_back(Frame); + CurrentW64UnwindInfo = W64UnwindInfos.back(); } void MCStreamer::EnsureValidW64UnwindInfo() { @@ -321,15 +335,15 @@ void MCStreamer::EnsureValidW64UnwindInfo() { report_fatal_error("No open Win64 EH frame function!"); } -void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol) { +void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) { MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; if (CurFrame && !CurFrame->End) report_fatal_error("Starting a function before ending the previous one!"); - MCWin64EHUnwindInfo Frame; - Frame.Begin = getContext().CreateTempSymbol(); - Frame.Function = Symbol; - EmitLabel(Frame.Begin); - setCurrentW64UnwindInfo(&Frame); + MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; + Frame->Begin = getContext().CreateTempSymbol(); + Frame->Function = Symbol; + EmitLabel(Frame->Begin); + setCurrentW64UnwindInfo(Frame); } void MCStreamer::EmitWin64EHEndProc() { @@ -343,13 +357,13 @@ void MCStreamer::EmitWin64EHEndProc() { void MCStreamer::EmitWin64EHStartChained() { EnsureValidW64UnwindInfo(); - MCWin64EHUnwindInfo Frame; + MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - Frame.Begin = getContext().CreateTempSymbol(); - Frame.Function = CurFrame->Function; - Frame.ChainedParent = CurFrame; - EmitLabel(Frame.Begin); - setCurrentW64UnwindInfo(&Frame); + Frame->Begin = getContext().CreateTempSymbol(); + Frame->Function = CurFrame->Function; + Frame->ChainedParent = CurFrame; + EmitLabel(Frame->Begin); + setCurrentW64UnwindInfo(Frame); } void MCStreamer::EmitWin64EHEndChained() { @@ -366,67 +380,98 @@ void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, bool Except) { EnsureValidW64UnwindInfo(); MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + if (CurFrame->ChainedParent) + report_fatal_error("Chained unwind areas can't have handlers!"); CurFrame->ExceptionHandler = Sym; - if (Unwind) - CurFrame->UnwindOnly = true; - else if (!Except) + if (!Except && !Unwind) report_fatal_error("Don't know what kind of handler this is!"); + if (Unwind) + CurFrame->HandlesUnwind = true; + if (Except) + CurFrame->HandlesExceptions = true; } void MCStreamer::EmitWin64EHHandlerData() { - errs() << "Not implemented yet\n"; - abort(); + EnsureValidW64UnwindInfo(); + MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + if (CurFrame->ChainedParent) + report_fatal_error("Chained unwind areas can't have handlers!"); } void MCStreamer::EmitWin64EHPushReg(unsigned Register) { EnsureValidW64UnwindInfo(); MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Register); + MCSymbol *Label = getContext().CreateTempSymbol(); + MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register); + EmitLabel(Label); CurFrame->Instructions.push_back(Inst); } void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) { EnsureValidW64UnwindInfo(); MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Register, Offset); + if (CurFrame->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); } void MCStreamer::EmitWin64EHAllocStack(unsigned Size) { EnsureValidW64UnwindInfo(); + if (Size & 7) + report_fatal_error("Misaligned stack allocation!"); MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; - MCWin64EHInstruction Inst(Size); + MCSymbol *Label = getContext().CreateTempSymbol(); + MCWin64EHInstruction Inst(Label, Size); + EmitLabel(Label); CurFrame->Instructions.push_back(Inst); } void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) { EnsureValidW64UnwindInfo(); + if (Offset & 7) + report_fatal_error("Misaligned saved register offset!"); MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + MCSymbol *Label = getContext().CreateTempSymbol(); MCWin64EHInstruction Inst( - Offset > 0xFFFF ? Win64EH::UOP_SaveNonVol : Win64EH::UOP_SaveNonVolBig, - Register, Offset); + Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol, + Label, Register, Offset); + EmitLabel(Label); CurFrame->Instructions.push_back(Inst); } void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) { EnsureValidW64UnwindInfo(); + if (Offset & 0x0F) + report_fatal_error("Misaligned saved vector register offset!"); MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + MCSymbol *Label = getContext().CreateTempSymbol(); MCWin64EHInstruction Inst( - Offset > 0xFFFF ? Win64EH::UOP_SaveXMM128 : Win64EH::UOP_SaveXMM128Big, - Register, Offset); + 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; - MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Code); + 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); + EmitLabel(Label); CurFrame->Instructions.push_back(Inst); } void MCStreamer::EmitWin64EHEndProlog() { - errs() << "Not implemented yet\n"; - abort(); + EnsureValidW64UnwindInfo(); + MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + CurFrame->PrologEnd = getContext().CreateTempSymbol(); + EmitLabel(CurFrame->PrologEnd); } void MCStreamer::EmitFnStart() { @@ -494,3 +539,10 @@ void MCStreamer::EmitFrames(bool usingCFI) { if (EmitDebugFrame) MCDwarfFrameEmitter::Emit(*this, usingCFI, false); } + +void MCStreamer::EmitW64Tables() { + if (!getNumW64UnwindInfos()) + return; + + MCWin64EHUnwindEmitter::Emit(*this); +}