X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCDwarf.cpp;h=4658a3093fab369ea8e91d7fb22c2ff2764c9140;hb=f0dc257a8fe1325f2226d1c274c4d10c614b9e8b;hp=9bc9415837ae8d7b642cca2162467738db06a5d6;hpb=4bb5b037126ea35f35d5a490b03ccffa8677fa5e;p=oota-llvm.git diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp index 9bc9415837a..4658a3093fa 100644 --- a/lib/MC/MCDwarf.cpp +++ b/lib/MC/MCDwarf.cpp @@ -7,17 +7,18 @@ // //===----------------------------------------------------------------------===// -#include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCDwarf.h" +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCObjectFileInfo.h" +#include "llvm/MC/MCObjectWriter.h" +#include "llvm/MC/MCRegisterInfo.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCObjectWriter.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/raw_ostream.h" -#include "llvm/Target/TargetAsmInfo.h" #include "llvm/ADT/FoldingSet.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/StringExtras.h" @@ -172,7 +173,7 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS, // At this point we want to emit/create the sequence to encode the delta in // line numbers and the increment of the address from the previous Label // and the current Label. - const TargetAsmInfo &asmInfo = MCOS->getContext().getTargetAsmInfo(); + const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo(); MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label, asmInfo.getPointerSize()); @@ -196,9 +197,9 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS, MCOS->EmitLabel(SectionEnd); // Switch back the the dwarf line section. - MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); + MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection()); - const TargetAsmInfo &asmInfo = MCOS->getContext().getTargetAsmInfo(); + const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo(); MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd, asmInfo.getPointerSize()); } @@ -209,7 +210,7 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS, void MCDwarfFileTable::Emit(MCStreamer *MCOS) { MCContext &context = MCOS->getContext(); // Switch to the section where the table will be emitted into. - MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); + MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection()); // Create a symbol at the beginning of this section. MCSymbol *LineStartSym = context.CreateTempSymbol(); @@ -431,25 +432,24 @@ void MCDwarfFile::dump() const { static int getDataAlignmentFactor(MCStreamer &streamer) { MCContext &context = streamer.getContext(); - const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); + const MCAsmInfo &asmInfo = context.getAsmInfo(); int size = asmInfo.getPointerSize(); - if (asmInfo.getStackGrowthDirection() == TargetFrameLowering::StackGrowsUp) + if (asmInfo.isStackGrowthDirectionUp()) return size; - else - return -size; + else + return -size; } static unsigned getSizeForEncoding(MCStreamer &streamer, unsigned symbolEncoding) { MCContext &context = streamer.getContext(); - const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); unsigned format = symbolEncoding & 0x0f; switch (format) { default: assert(0 && "Unknown Encoding"); case dwarf::DW_EH_PE_absptr: case dwarf::DW_EH_PE_signed: - return asmInfo.getPointerSize(); + return context.getAsmInfo().getPointerSize(); case dwarf::DW_EH_PE_udata2: case dwarf::DW_EH_PE_sdata2: return 2; @@ -486,11 +486,11 @@ static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, } static const MachineLocation TranslateMachineLocation( - const TargetAsmInfo &AsmInfo, + const MCRegisterInfo &MRI, const MachineLocation &Loc) { unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ? MachineLocation::VirtualFP : - unsigned(AsmInfo.getDwarfRegNum(Loc.getReg(), true)); + unsigned(MRI.getDwarfRegNum(Loc.getReg(), true)); const MachineLocation &NewLoc = Loc.isReg() ? MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset()); return NewLoc; @@ -504,10 +504,11 @@ namespace { bool IsEH; const MCSymbol *SectionStart; public: - FrameEmitterImpl(bool usingCFI, bool isEH, const MCSymbol *sectionStart) : - CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH), - SectionStart(sectionStart) { - } + FrameEmitterImpl(bool usingCFI, bool isEH) + : CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH), + SectionStart(0) {} + + void setSectionStart(const MCSymbol *Label) { SectionStart = Label; } /// EmitCompactUnwind - Emit the unwind information in a compact way. If /// we're successful, return 'true'. Otherwise, return 'false' and it will @@ -688,11 +689,8 @@ void FrameEmitterImpl::EmitCFIInstructions(MCStreamer &streamer, /// normal CIE and FDE. bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, const MCDwarfFrameInfo &Frame) { -#if 1 - return false; -#else MCContext &Context = Streamer.getContext(); - const TargetAsmInfo &TAI = Context.getTargetAsmInfo(); + const MCObjectFileInfo *MOFI = Context.getObjectFileInfo(); bool VerboseAsm = Streamer.isVerboseAsm(); // range-start range-length compact-unwind-enc personality-func lsda @@ -717,19 +715,17 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, // .quad __gxx_personality // .quad except_tab1 - uint32_t Encoding = - TAI.getCompactUnwindEncoding(Frame.Instructions, - getDataAlignmentFactor(Streamer), IsEH); + uint32_t Encoding = Frame.CompactUnwindEncoding; if (!Encoding) return false; // The encoding needs to know we have an LSDA. if (Frame.Lsda) Encoding |= 0x40000000; - Streamer.SwitchSection(TAI.getCompactUnwindSection()); + Streamer.SwitchSection(MOFI->getCompactUnwindSection()); // Range Start - unsigned FDEEncoding = TAI.getFDEEncoding(UsingCFI); + unsigned FDEEncoding = MOFI->getFDEEncoding(UsingCFI); unsigned Size = getSizeForEncoding(Streamer, FDEEncoding); if (VerboseAsm) Streamer.AddComment("Range Start"); Streamer.EmitSymbolValue(Frame.Function, Size); @@ -746,6 +742,7 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, Twine(llvm::utohexstr(Encoding))); Streamer.EmitIntValue(Encoding, Size); + // Personality Function Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr); if (VerboseAsm) Streamer.AddComment("Personality Function"); @@ -763,7 +760,6 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, Streamer.EmitIntValue(0, Size); // No LSDA return true; -#endif } const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, @@ -772,11 +768,12 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, const MCSymbol *lsda, unsigned lsdaEncoding) { MCContext &context = streamer.getContext(); - const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); + const MCRegisterInfo &MRI = context.getRegisterInfo(); + const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); bool verboseAsm = streamer.isVerboseAsm(); MCSymbol *sectionStart; - if (asmInfo.isFunctionEHFrameSymbolPrivate() || !IsEH) + if (MOFI->isFunctionEHFrameSymbolPrivate() || !IsEH) sectionStart = context.CreateTempSymbol(); else sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum)); @@ -825,7 +822,7 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, // Return Address Register if (verboseAsm) streamer.AddComment("CIE Return Address Column"); - streamer.EmitULEB128IntValue(asmInfo.getDwarfRARegNum(true)); + streamer.EmitULEB128IntValue(MRI.getDwarfRegNum(MRI.getRARegister(), true)); // Augmentation Data Length (optional) @@ -859,21 +856,22 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding"); // Encoding of the FDE pointers - EmitEncodingByte(streamer, asmInfo.getFDEEncoding(UsingCFI), + EmitEncodingByte(streamer, MOFI->getFDEEncoding(UsingCFI), "FDE Encoding"); } // Initial Instructions - const std::vector &Moves = asmInfo.getInitialFrameState(); + const MCAsmInfo &MAI = context.getAsmInfo(); + const std::vector &Moves = MAI.getInitialFrameState(); std::vector Instructions; for (int i = 0, n = Moves.size(); i != n; ++i) { MCSymbol *Label = Moves[i].getLabel(); const MachineLocation &Dst = - TranslateMachineLocation(asmInfo, Moves[i].getDestination()); + TranslateMachineLocation(MRI, Moves[i].getDestination()); const MachineLocation &Src = - TranslateMachineLocation(asmInfo, Moves[i].getSource()); + TranslateMachineLocation(MRI, Moves[i].getSource()); MCCFIInstruction Inst(Label, Dst, Src); Instructions.push_back(Inst); } @@ -881,7 +879,8 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, EmitCFIInstructions(streamer, Instructions, NULL); // Padding - streamer.EmitValueToAlignment(IsEH ? 4 : asmInfo.getPointerSize()); + streamer.EmitValueToAlignment(IsEH + ? 4 : context.getAsmInfo().getPointerSize()); streamer.EmitLabel(sectionEnd); return *sectionStart; @@ -893,10 +892,10 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer, MCContext &context = streamer.getContext(); MCSymbol *fdeStart = context.CreateTempSymbol(); MCSymbol *fdeEnd = context.CreateTempSymbol(); - const TargetAsmInfo &TAsmInfo = context.getTargetAsmInfo(); + const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); bool verboseAsm = streamer.isVerboseAsm(); - if (!TAsmInfo.isFunctionEHFrameSymbolPrivate() && IsEH) { + if (IsEH && frame.Function && !MOFI->isFunctionEHFrameSymbolPrivate()) { MCSymbol *EHSym = context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh")); streamer.EmitEHSymAttributes(frame.Function, EHSym); @@ -925,7 +924,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer, streamer.EmitSymbolValue(&cieStart, 4); } - unsigned fdeEncoding = TAsmInfo.getFDEEncoding(UsingCFI); + unsigned fdeEncoding = MOFI->getFDEEncoding(UsingCFI); unsigned size = getSizeForEncoding(streamer, fdeEncoding); // PC Begin @@ -1011,26 +1010,34 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer, bool UsingCFI, bool IsEH) { MCContext &Context = Streamer.getContext(); - const TargetAsmInfo &AsmInfo = Context.getTargetAsmInfo(); - const MCSection &Section = IsEH ? *AsmInfo.getEHFrameSection() : - *AsmInfo.getDwarfFrameSection(); + MCObjectFileInfo *MOFI = + const_cast(Context.getObjectFileInfo()); + FrameEmitterImpl Emitter(UsingCFI, IsEH); + ArrayRef FrameArray = Streamer.getFrameInfos(); + + // Emit the compact unwind info if available. + // FIXME: This emits both the compact unwind and the old CIE/FDE + // information. Only one of those is needed. + if (IsEH && MOFI->getCompactUnwindSection()) + for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) { + const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i); + if (!Frame.CompactUnwindEncoding) + Emitter.EmitCompactUnwind(Streamer, Frame); + } + + const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() : + *MOFI->getDwarfFrameSection(); Streamer.SwitchSection(&Section); MCSymbol *SectionStart = Context.CreateTempSymbol(); Streamer.EmitLabel(SectionStart); + Emitter.setSectionStart(SectionStart); MCSymbol *FDEEnd = NULL; DenseMap CIEStarts; - FrameEmitterImpl Emitter(UsingCFI, IsEH, SectionStart); const MCSymbol *DummyDebugKey = NULL; - for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) { - const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i); - if (IsEH && AsmInfo.getCompactUnwindSection() && - Emitter.EmitCompactUnwind(Streamer, Frame)) { - FDEEnd = NULL; - continue; - } - + for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) { + const MCDwarfFrameInfo &Frame = FrameArray[i]; CIEKey Key(Frame.Personality, Frame.PersonalityEncoding, Frame.LsdaEncoding); const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey; @@ -1045,7 +1052,7 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer, Streamer.EmitLabel(FDEEnd); } - Streamer.EmitValueToAlignment(AsmInfo.getPointerSize()); + Streamer.EmitValueToAlignment(Context.getAsmInfo().getPointerSize()); if (FDEEnd) Streamer.EmitLabel(FDEEnd); }