diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCStreamer.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCStreamer.cpp | 212 |
1 files changed, 194 insertions, 18 deletions
diff --git a/contrib/llvm/lib/MC/MCStreamer.cpp b/contrib/llvm/lib/MC/MCStreamer.cpp index fa245b1..ae3ed0f 100644 --- a/contrib/llvm/lib/MC/MCStreamer.cpp +++ b/contrib/llvm/lib/MC/MCStreamer.cpp @@ -15,17 +15,22 @@ #include "llvm/MC/MCSymbol.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/raw_ostream.h" +#include "llvm/Target/TargetAsmInfo.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/Twine.h" #include <cstdlib> using namespace llvm; -MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx) { +MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true), + EmitDebugFrame(false), + CurrentW64UnwindInfo(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, @@ -41,14 +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<MCSymbolRefExpr>(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() { @@ -76,9 +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.getTargetAsmInfo().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); } @@ -102,13 +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); } @@ -176,6 +178,12 @@ void MCStreamer::EmitLabel(MCSymbol *Symbol) { LastNonPrivate = Symbol; } +void MCStreamer::EmitCFISections(bool EH, bool Debug) { + assert(EH || Debug); + EmitEHFrame = EH; + EmitDebugFrame = Debug; +} + void MCStreamer::EmitCFIStartProc() { MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); if (CurFrame && !CurFrame->End) @@ -303,6 +311,156 @@ void MCStreamer::EmitCFISameValue(int64_t Register) { CurFrame->Instructions.push_back(Instruction); } +void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) { + W64UnwindInfos.push_back(Frame); + CurrentW64UnwindInfo = W64UnwindInfos.back(); +} + +void MCStreamer::EnsureValidW64UnwindInfo() { + MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + if (!CurFrame || CurFrame->End) + report_fatal_error("No open Win64 EH frame function!"); +} + +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 = new MCWin64EHUnwindInfo; + Frame->Begin = getContext().CreateTempSymbol(); + Frame->Function = Symbol; + EmitLabel(Frame->Begin); + setCurrentW64UnwindInfo(Frame); +} + +void MCStreamer::EmitWin64EHEndProc() { + EnsureValidW64UnwindInfo(); + MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + if (CurFrame->ChainedParent) + report_fatal_error("Not all chained regions terminated!"); + CurFrame->End = getContext().CreateTempSymbol(); + EmitLabel(CurFrame->End); +} + +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::EmitWin64EHEndChained() { + EnsureValidW64UnwindInfo(); + MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + if (!CurFrame->ChainedParent) + report_fatal_error("End of a chained region outside a chained region!"); + CurFrame->End = getContext().CreateTempSymbol(); + EmitLabel(CurFrame->End); + CurrentW64UnwindInfo = CurFrame->ChainedParent; +} + +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 (!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() { + 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; + 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; + 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; + 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 > 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 > 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); + EmitLabel(Label); + CurFrame->Instructions.push_back(Inst); +} + +void MCStreamer::EmitWin64EHEndProlog() { + EnsureValidW64UnwindInfo(); + MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; + CurFrame->PrologEnd = getContext().CreateTempSymbol(); + EmitLabel(CurFrame->PrologEnd); +} + void MCStreamer::EmitFnStart() { errs() << "Not implemented yet\n"; abort(); @@ -357,3 +515,21 @@ void MCStreamer::EmitRawText(const Twine &T) { T.toVector(Str); EmitRawText(Str.str()); } + +void MCStreamer::EmitFrames(bool usingCFI) { + if (!getNumFrameInfos()) + return; + + if (EmitEHFrame) + MCDwarfFrameEmitter::Emit(*this, usingCFI, true); + + if (EmitDebugFrame) + MCDwarfFrameEmitter::Emit(*this, usingCFI, false); +} + +void MCStreamer::EmitW64Tables() { + if (!getNumW64UnwindInfos()) + return; + + MCWin64EHUnwindEmitter::Emit(*this); +} |
