diff options
Diffstat (limited to 'lib/MC/MCAsmStreamer.cpp')
| -rw-r--r-- | lib/MC/MCAsmStreamer.cpp | 310 |
1 files changed, 243 insertions, 67 deletions
diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp index 8d06982..9717c01 100644 --- a/lib/MC/MCAsmStreamer.cpp +++ b/lib/MC/MCAsmStreamer.cpp @@ -45,20 +45,25 @@ class MCAsmStreamer : public MCStreamer { unsigned IsVerboseAsm : 1; unsigned ShowInst : 1; unsigned UseLoc : 1; + unsigned UseCFI : 1; + + enum EHSymbolFlags { EHGlobal = 1, + EHWeakDefinition = 1 << 1, + EHPrivateExtern = 1 << 2 }; + DenseMap<const MCSymbol*, unsigned> FlagMap; bool needsSet(const MCExpr *Value); public: MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os, - bool isVerboseAsm, - bool useLoc, + bool isVerboseAsm, bool useLoc, bool useCFI, MCInstPrinter *printer, MCCodeEmitter *emitter, TargetAsmBackend *asmbackend, bool showInst) : MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()), InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend), CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm), - ShowInst(showInst), UseLoc(useLoc) { + ShowInst(showInst), UseLoc(useLoc), UseCFI(useCFI) { if (InstPrinter && IsVerboseAsm) InstPrinter->setCommentStream(CommentStream); } @@ -118,7 +123,8 @@ public: } virtual void EmitLabel(MCSymbol *Symbol); - + virtual void EmitEHSymAttributes(const MCSymbol *Symbol, + MCSymbol *EHSymbol); virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); virtual void EmitThumbFunc(MCSymbol *Func); @@ -127,6 +133,8 @@ public: virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, const MCSymbol *LastLabel, const MCSymbol *Label); + virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, + const MCSymbol *Label); virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute); @@ -154,13 +162,13 @@ public: virtual void EmitBytes(StringRef Data, unsigned AddrSpace); virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, - bool isPCRel, unsigned AddrSpace); + unsigned AddrSpace); virtual void EmitIntValue(uint64_t Value, unsigned Size, unsigned AddrSpace = 0); - virtual void EmitULEB128Value(const MCExpr *Value, unsigned AddrSpace = 0); + virtual void EmitULEB128Value(const MCExpr *Value); - virtual void EmitSLEB128Value(const MCExpr *Value, unsigned AddrSpace = 0); + virtual void EmitSLEB128Value(const MCExpr *Value); virtual void EmitGPRel32Value(const MCExpr *Value); @@ -182,15 +190,32 @@ public: virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Filename); virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, unsigned Column, unsigned Flags, - unsigned Isa, unsigned Discriminator); + unsigned Isa, unsigned Discriminator, + StringRef FileName); + + virtual void EmitCFIStartProc(); + virtual void EmitCFIEndProc(); + virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset); + virtual void EmitCFIDefCfaOffset(int64_t Offset); + virtual void EmitCFIDefCfaRegister(int64_t Register); + virtual void EmitCFIOffset(int64_t Register, int64_t Offset); + virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding); + virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding); + virtual void EmitCFIRememberState(); + virtual void EmitCFIRestoreState(); + virtual void EmitCFISameValue(int64_t Register); + virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset); + virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment); + + virtual void EmitFnStart(); + virtual void EmitFnEnd(); + virtual void EmitCantUnwind(); + virtual void EmitPersonality(const MCSymbol *Personality); + virtual void EmitHandlerData(); + virtual void EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0); + virtual void EmitPad(int64_t Offset); + virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool); - virtual bool EmitCFIStartProc(); - virtual bool EmitCFIEndProc(); - virtual bool EmitCFIDefCfaOffset(int64_t Offset); - virtual bool EmitCFIDefCfaRegister(int64_t Register); - virtual bool EmitCFIOffset(int64_t Register, int64_t Offset); - virtual bool EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding); - virtual bool EmitCFILsda(const MCSymbol *Sym, unsigned Encoding); virtual void EmitInstruction(const MCInst &Inst); @@ -259,14 +284,27 @@ void MCAsmStreamer::ChangeSection(const MCSection *Section) { Section->PrintSwitchToSection(MAI, OS); } +void MCAsmStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, + MCSymbol *EHSymbol) { + if (UseCFI) + return; + + unsigned Flags = FlagMap.lookup(Symbol); + + if (Flags & EHGlobal) + EmitSymbolAttribute(EHSymbol, MCSA_Global); + if (Flags & EHWeakDefinition) + EmitSymbolAttribute(EHSymbol, MCSA_WeakDefinition); + if (Flags & EHPrivateExtern) + EmitSymbolAttribute(EHSymbol, MCSA_PrivateExtern); +} + void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) { assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); - assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); - assert(getCurrentSection() && "Cannot emit before setting section!"); + MCStreamer::EmitLabel(Symbol); OS << *Symbol << MAI.getLabelSuffix(); EmitEOL(); - Symbol->setSection(*getCurrentSection()); } void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { @@ -309,6 +347,15 @@ void MCAsmStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta, getContext().getTargetAsmInfo().getPointerSize()); } +void MCAsmStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, + const MCSymbol *Label) { + EmitIntValue(dwarf::DW_CFA_advance_loc4, 1); + const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); + AddrDelta = ForceExpAbs(this, getContext(), AddrDelta); + EmitValue(AddrDelta, 4); +} + + void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) { switch (Attribute) { @@ -337,6 +384,7 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol, return; case MCSA_Global: // .globl/.global OS << MAI.getGlobalDirective(); + FlagMap[Symbol] |= EHGlobal; break; case MCSA_Hidden: OS << "\t.hidden\t"; break; case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break; @@ -345,11 +393,17 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol, case MCSA_Local: OS << "\t.local\t"; break; case MCSA_NoDeadStrip: OS << "\t.no_dead_strip\t"; break; case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break; - case MCSA_PrivateExtern: OS << "\t.private_extern\t"; break; + case MCSA_PrivateExtern: + OS << "\t.private_extern\t"; + FlagMap[Symbol] |= EHPrivateExtern; + break; case MCSA_Protected: OS << "\t.protected\t"; break; case MCSA_Reference: OS << "\t.reference\t"; break; case MCSA_Weak: OS << "\t.weak\t"; break; - case MCSA_WeakDefinition: OS << "\t.weak_definition\t"; break; + case MCSA_WeakDefinition: + OS << "\t.weak_definition\t"; + FlagMap[Symbol] |= EHWeakDefinition; + break; // .weak_reference case MCSA_WeakReference: OS << MAI.getWeakRefDirective(); break; case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break; @@ -512,9 +566,8 @@ void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size, } void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, - bool isPCRel, unsigned AddrSpace) { + unsigned AddrSpace) { assert(getCurrentSection() && "Cannot emit contents before setting section!"); - assert(!isPCRel && "Cannot emit pc relative relocations!"); const char *Directive = 0; switch (Size) { default: break; @@ -543,10 +596,10 @@ void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, EmitEOL(); } -void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value, unsigned AddrSpace) { +void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value) { int64_t IntValue; if (Value->EvaluateAsAbsolute(IntValue)) { - EmitULEB128IntValue(IntValue, AddrSpace); + EmitULEB128IntValue(IntValue); return; } assert(MAI.hasLEB128() && "Cannot print a .uleb"); @@ -554,10 +607,10 @@ void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value, unsigned AddrSpace) { EmitEOL(); } -void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value, unsigned AddrSpace) { +void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) { int64_t IntValue; if (Value->EvaluateAsAbsolute(IntValue)) { - EmitSLEB128IntValue(IntValue, AddrSpace); + EmitSLEB128IntValue(IntValue); return; } assert(MAI.hasLEB128() && "Cannot print a .sleb"); @@ -673,9 +726,10 @@ bool MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo, StringRef Filename){ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, unsigned Column, unsigned Flags, unsigned Isa, - unsigned Discriminator) { + unsigned Discriminator, + StringRef FileName) { this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags, - Isa, Discriminator); + Isa, Discriminator, FileName); if (!UseLoc) return; @@ -701,78 +755,144 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, OS << "isa " << Isa; if (Discriminator) OS << "discriminator " << Discriminator; + + if (IsVerboseAsm) { + OS.PadToColumn(MAI.getCommentColumn()); + OS << MAI.getCommentString() << ' ' << FileName << ':' + << Line << ':' << Column; + } EmitEOL(); } -bool MCAsmStreamer::EmitCFIStartProc() { - if (this->MCStreamer::EmitCFIStartProc()) - return true; +void MCAsmStreamer::EmitCFIStartProc() { + MCStreamer::EmitCFIStartProc(); + + if (!UseCFI) + return; OS << "\t.cfi_startproc"; EmitEOL(); - - return false; } -bool MCAsmStreamer::EmitCFIEndProc() { - if (this->MCStreamer::EmitCFIEndProc()) - return true; +void MCAsmStreamer::EmitCFIEndProc() { + MCStreamer::EmitCFIEndProc(); + + if (!UseCFI) + return; OS << "\t.cfi_endproc"; EmitEOL(); +} + +void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { + MCStreamer::EmitCFIDefCfa(Register, Offset); + + if (!UseCFI) + return; - return false; + OS << ".cfi_def_cfa " << Register << ", " << Offset; + EmitEOL(); } -bool MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) { - if (this->MCStreamer::EmitCFIDefCfaOffset(Offset)) - return true; +void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) { + MCStreamer::EmitCFIDefCfaOffset(Offset); + + if (!UseCFI) + return; OS << "\t.cfi_def_cfa_offset " << Offset; EmitEOL(); - - return false; } -bool MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) { - if (this->MCStreamer::EmitCFIDefCfaRegister(Register)) - return true; +void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) { + MCStreamer::EmitCFIDefCfaRegister(Register); + + if (!UseCFI) + return; OS << "\t.cfi_def_cfa_register " << Register; EmitEOL(); - - return false; } -bool MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { - if (this->MCStreamer::EmitCFIOffset(Register, Offset)) - return true; +void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { + this->MCStreamer::EmitCFIOffset(Register, Offset); + + if (!UseCFI) + return; OS << "\t.cfi_offset " << Register << ", " << Offset; EmitEOL(); - - return false; } -bool MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym, +void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) { - if (this->MCStreamer::EmitCFIPersonality(Sym, Encoding)) - return true; + MCStreamer::EmitCFIPersonality(Sym, Encoding); + + if (!UseCFI) + return; OS << "\t.cfi_personality " << Encoding << ", " << *Sym; EmitEOL(); - - return false; } -bool MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { - if (this->MCStreamer::EmitCFILsda(Sym, Encoding)) - return true; +void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { + MCStreamer::EmitCFILsda(Sym, Encoding); + + if (!UseCFI) + return; OS << "\t.cfi_lsda " << Encoding << ", " << *Sym; EmitEOL(); +} + +void MCAsmStreamer::EmitCFIRememberState() { + MCStreamer::EmitCFIRememberState(); + + if (!UseCFI) + return; + + OS << "\t.cfi_remember_state"; + EmitEOL(); +} + +void MCAsmStreamer::EmitCFIRestoreState() { + MCStreamer::EmitCFIRestoreState(); + + if (!UseCFI) + return; - return false; + OS << "\t.cfi_restore_state"; + EmitEOL(); +} + +void MCAsmStreamer::EmitCFISameValue(int64_t Register) { + MCStreamer::EmitCFISameValue(Register); + + if (!UseCFI) + return; + + OS << "\t.cfi_same_value " << Register; + EmitEOL(); +} + +void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { + MCStreamer::EmitCFIRelOffset(Register, Offset); + + if (!UseCFI) + return; + + OS << "\t.cfi_rel_offset " << Register << ", " << Offset; + EmitEOL(); +} + +void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) { + MCStreamer::EmitCFIAdjustCfaOffset(Adjustment); + + if (!UseCFI) + return; + + OS << "\t.cfi_adjust_cfa_offset " << Adjustment; + EmitEOL(); } void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { @@ -834,13 +954,13 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { OS << "0b"; for (unsigned j = 8; j--;) { unsigned Bit = (Code[i] >> j) & 1; - + unsigned FixupBit; if (getContext().getTargetAsmInfo().isLittleEndian()) FixupBit = i * 8 + j; else FixupBit = i * 8 + (7-j); - + if (uint8_t MapEntry = FixupMap[FixupBit]) { assert(Bit == 0 && "Encoder wrote into fixed up bit!"); OS << char('A' + MapEntry - 1); @@ -859,12 +979,64 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { } } +void MCAsmStreamer::EmitFnStart() { + OS << "\t.fnstart"; + EmitEOL(); +} + +void MCAsmStreamer::EmitFnEnd() { + OS << "\t.fnend"; + EmitEOL(); +} + +void MCAsmStreamer::EmitCantUnwind() { + OS << "\t.cantunwind"; + EmitEOL(); +} + +void MCAsmStreamer::EmitHandlerData() { + OS << "\t.handlerdata"; + EmitEOL(); +} + +void MCAsmStreamer::EmitPersonality(const MCSymbol *Personality) { + OS << "\t.personality " << Personality->getName(); + EmitEOL(); +} + +void MCAsmStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) { + OS << "\t.setfp\t" << InstPrinter->getRegName(FpReg) + << ", " << InstPrinter->getRegName(SpReg); + if (Offset) + OS << ", #" << Offset; + EmitEOL(); +} + +void MCAsmStreamer::EmitPad(int64_t Offset) { + OS << "\t.pad\t#" << Offset; + EmitEOL(); +} + +void MCAsmStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, + bool isVector) { + assert(RegList.size() && "RegList should not be empty"); + if (isVector) + OS << "\t.vsave\t{"; + else + OS << "\t.save\t{"; + + OS << InstPrinter->getRegName(RegList[0]); + + for (unsigned i = 1, e = RegList.size(); i != e; ++i) + OS << ", " << InstPrinter->getRegName(RegList[i]); + + OS << "}"; + EmitEOL(); +} + void MCAsmStreamer::EmitInstruction(const MCInst &Inst) { assert(getCurrentSection() && "Cannot emit contents before setting section!"); - if (!UseLoc) - MCLineEntry::Make(this, getCurrentSection()); - // Show the encoding in a comment if we have a code emitter. if (Emitter) AddEncodingComment(Inst); @@ -897,13 +1069,17 @@ void MCAsmStreamer::Finish() { // Dump out the dwarf file & directory tables and line tables. if (getContext().hasDwarfFiles() && !UseLoc) MCDwarfFileTable::Emit(this); + + if (getNumFrameInfos() && !UseCFI) + MCDwarfFrameEmitter::Emit(*this, false); } MCStreamer *llvm::createAsmStreamer(MCContext &Context, formatted_raw_ostream &OS, bool isVerboseAsm, bool useLoc, + bool useCFI, MCInstPrinter *IP, MCCodeEmitter *CE, TargetAsmBackend *TAB, bool ShowInst) { - return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc, + return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc, useCFI, IP, CE, TAB, ShowInst); } |
