X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCAsmStreamer.cpp;h=e5f8ac96d78c97a9b6eb3ead97a1f20729750971;hb=0e6a052331f674dd70e28af41f654a7874405eab;hp=f67aac3fcaf5c3ff5cccafd2403f33704c13c324;hpb=2fb86a8fe6c53ea55511fa7e42c561138e55f8c4;p=oota-llvm.git diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp index f67aac3fcaf..e5f8ac96d78 100644 --- a/lib/MC/MCAsmStreamer.cpp +++ b/lib/MC/MCAsmStreamer.cpp @@ -15,6 +15,7 @@ #include "llvm/MC/MCFixupKindInfo.h" #include "llvm/MC/MCInst.h" #include "llvm/MC/MCInstPrinter.h" +#include "llvm/MC/MCRegisterInfo.h" #include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCSymbol.h" #include "llvm/ADT/OwningPtr.h" @@ -137,7 +138,8 @@ public: virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol); virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, const MCSymbol *LastLabel, - const MCSymbol *Label); + const MCSymbol *Label, + unsigned PointerSize); virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, const MCSymbol *Label); @@ -364,9 +366,9 @@ void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) { void MCAsmStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta, const MCSymbol *LastLabel, - const MCSymbol *Label) { - EmitDwarfSetLineAddr(LineDelta, Label, - getContext().getTargetAsmInfo().getPointerSize()); + const MCSymbol *Label, + unsigned PointerSize) { + EmitDwarfSetLineAddr(LineDelta, Label, PointerSize); } void MCAsmStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, @@ -603,7 +605,7 @@ void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, int64_t IntValue; if (!Value->EvaluateAsAbsolute(IntValue)) report_fatal_error("Don't know how to emit this value."); - if (getContext().getTargetAsmInfo().isLittleEndian()) { + if (getContext().getAsmInfo().isLittleEndian()) { EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace); EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace); } else { @@ -825,9 +827,9 @@ void MCAsmStreamer::EmitCFIEndProc() { } void MCAsmStreamer::EmitRegisterName(int64_t Register) { - if (InstPrinter) { - const TargetAsmInfo &asmInfo = getContext().getTargetAsmInfo(); - unsigned LLVMRegister = asmInfo.getLLVMRegNum(Register, true); + if (InstPrinter && !MAI.useDwarfRegNumForCFI()) { + const MCRegisterInfo &MRI = getContext().getRegisterInfo(); + unsigned LLVMRegister = MRI.getLLVMRegNum(Register, true); InstPrinter->printRegName(OS, LLVMRegister); } else { OS << Register; @@ -1088,7 +1090,7 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { } } - // FIXME: Node the fixup comments for Thumb2 are completely bogus since the + // FIXME: Note the fixup comments for Thumb2 are completely bogus since the // high order halfword of a 32-bit Thumb2 instruction is emitted first. OS << "encoding: ["; for (unsigned i = 0, e = Code.size(); i != e; ++i) { @@ -1123,7 +1125,7 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { unsigned Bit = (Code[i] >> j) & 1; unsigned FixupBit; - if (getContext().getTargetAsmInfo().isLittleEndian()) + if (getContext().getAsmInfo().isLittleEndian()) FixupBit = i * 8 + j; else FixupBit = i * 8 + (7-j); @@ -1244,373 +1246,12 @@ void MCAsmStreamer::Finish() { if (!UseCFI) EmitFrames(false); } - -//===----------------------------------------------------------------------===// -/// MCLSDADecoderAsmStreamer - This is identical to the MCAsmStreamer, but -/// outputs a description of the LSDA in a human readable format. -/// -namespace { - -class MCLSDADecoderAsmStreamer : public MCAsmStreamer { - const MCSymbol *PersonalitySymbol; - const MCSymbol *LSDASymbol; - bool InLSDA; - bool ReadingULEB128; - - uint64_t BytesRead; - uint64_t ActionTableBytes; - uint64_t LSDASize; - - SmallVector ULEB128Value; - std::vector LSDAEncoding; - std::vector Assignments; - - /// GetULEB128Value - A helper function to convert the value in the - /// ULEB128Value vector into a uint64_t. - uint64_t GetULEB128Value(SmallVectorImpl &ULEB128Value) { - uint64_t Val = 0; - for (unsigned i = 0, e = ULEB128Value.size(); i != e; ++i) - Val |= (ULEB128Value[i] & 0x7F) << (7 * i); - return Val; - } - - /// ResetState - Reset the state variables. - void ResetState() { - PersonalitySymbol = 0; - LSDASymbol = 0; - LSDASize = 0; - BytesRead = 0; - ActionTableBytes = 0; - InLSDA = false; - ReadingULEB128 = false; - ULEB128Value.clear(); - LSDAEncoding.clear(); - Assignments.clear(); - } - - void EmitEHTableDescription(); - - const char *DecodeDWARFEncoding(unsigned Encoding) { - switch (Encoding) { - case dwarf::DW_EH_PE_absptr: return "absptr"; - case dwarf::DW_EH_PE_omit: return "omit"; - case dwarf::DW_EH_PE_pcrel: return "pcrel"; - case dwarf::DW_EH_PE_udata4: return "udata4"; - case dwarf::DW_EH_PE_udata8: return "udata8"; - case dwarf::DW_EH_PE_sdata4: return "sdata4"; - case dwarf::DW_EH_PE_sdata8: return "sdata8"; - case dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4: return "pcrel udata4"; - case dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4: return "pcrel sdata4"; - case dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8: return "pcrel udata8"; - case dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8: return "pcrel sdata8"; - case dwarf::DW_EH_PE_indirect|dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4: - return "indirect pcrel udata4"; - case dwarf::DW_EH_PE_indirect|dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4: - return "indirect pcrel sdata4"; - case dwarf::DW_EH_PE_indirect|dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8: - return "indirect pcrel udata8"; - case dwarf::DW_EH_PE_indirect|dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8: - return "indirect pcrel sdata8"; - } - - return ""; - } -public: - MCLSDADecoderAsmStreamer(MCContext &Context, formatted_raw_ostream &os, - bool isVerboseAsm, bool useLoc, bool useCFI, - MCInstPrinter *printer, MCCodeEmitter *emitter, - TargetAsmBackend *asmbackend, - bool showInst) - : MCAsmStreamer(Context, os, isVerboseAsm, useLoc, useCFI, - printer, emitter, asmbackend, showInst) { - ResetState(); - } - ~MCLSDADecoderAsmStreamer() {} - - virtual void Finish() { - ResetState(); - MCAsmStreamer::Finish(); - } - - virtual void EmitLabel(MCSymbol *Symbol) { - if (Symbol == LSDASymbol) - InLSDA = true; - MCAsmStreamer::EmitLabel(Symbol); - } - virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { - if (InLSDA) - Assignments.push_back(Value); - MCAsmStreamer::EmitAssignment(Symbol, Value); - } - virtual void EmitIntValue(uint64_t Value, unsigned Size, - unsigned AddrSpace = 0); - virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, - unsigned AddrSpace); - virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue, - unsigned AddrSpace); - virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) { - PersonalitySymbol = Sym; - MCAsmStreamer::EmitCFIPersonality(Sym, Encoding); - } - virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { - LSDASymbol = Sym; - MCAsmStreamer::EmitCFILsda(Sym, Encoding); - } -}; - -} // end anonymous namespace - -void MCLSDADecoderAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size, - unsigned AddrSpace) { - if (!InLSDA) - return MCAsmStreamer::EmitIntValue(Value, Size, AddrSpace); - - BytesRead += Size; - - // We place the LSDA into the LSDAEncoding vector for later analysis. If we - // have a ULEB128, we read that in separate iterations through here and then - // get its value. - if (!ReadingULEB128) { - LSDAEncoding.push_back(Value); - int EncodingSize = LSDAEncoding.size(); - - if (EncodingSize == 1 || EncodingSize == 3) { - // The LPStart and TType encodings. - if (Value != dwarf::DW_EH_PE_omit) { - // The encoding is next and is a ULEB128 value. - ReadingULEB128 = true; - ULEB128Value.clear(); - } else { - // The encoding was omitted. Put a 0 here as a placeholder. - LSDAEncoding.push_back(0); - } - } else if (EncodingSize == 5) { - // The next value is a ULEB128 value that tells us how long the call site - // table is -- where the start of the action tab - ReadingULEB128 = true; - ULEB128Value.clear(); - } - - InLSDA = (LSDASize == 0 || BytesRead < LSDASize); - } else { - // We're reading a ULEB128. Make it so! - assert(Size == 1 && "Non-byte representation of a ULEB128?"); - ULEB128Value.push_back(Value); - - if ((Value & 0x80) == 0) { - uint64_t Val = GetULEB128Value(ULEB128Value); - LSDAEncoding.push_back(Val); - ULEB128Value.clear(); - ReadingULEB128 = false; - - if (LSDAEncoding.size() == 4) - // The fourth value tells us where the bottom of the type table is. - LSDASize = BytesRead + LSDAEncoding[3]; - else if (LSDAEncoding.size() == 6) - // The sixth value tells us where the start of the action table is. - ActionTableBytes = BytesRead; - } - } - - MCAsmStreamer::EmitValueImpl(MCConstantExpr::Create(Value, getContext()), - Size, AddrSpace); - - if (LSDASize != 0 && !InLSDA) - EmitEHTableDescription(); -} - -void MCLSDADecoderAsmStreamer::EmitValueImpl(const MCExpr *Value, - unsigned Size, - unsigned AddrSpace) { - if (InLSDA && LSDASize != 0) { - assert(BytesRead + Size <= LSDASize && "EH table too small!"); - - if (BytesRead > uint64_t(LSDAEncoding[5]) + ActionTableBytes) - // Insert the type values. - Assignments.push_back(Value); - - LSDAEncoding.push_back(Assignments.size()); - BytesRead += Size; - InLSDA = (LSDASize == 0 || BytesRead < LSDASize); - } - - MCAsmStreamer::EmitValueImpl(Value, Size, AddrSpace); - - if (LSDASize != 0 && !InLSDA) - EmitEHTableDescription(); -} - -void MCLSDADecoderAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, - unsigned AddrSpace) { - if (InLSDA && ReadingULEB128) { - for (uint64_t I = NumBytes; I != 0; --I) - ULEB128Value.push_back(FillValue); - - BytesRead += NumBytes; - - if ((FillValue & 0x80) == 0) { - uint64_t Val = GetULEB128Value(ULEB128Value); - LSDAEncoding.push_back(Val); - ULEB128Value.clear(); - ReadingULEB128 = false; - - if (LSDAEncoding.size() == 4) - // The fourth value tells us where the bottom of the type table is. - LSDASize = BytesRead + LSDAEncoding[3]; - else if (LSDAEncoding.size() == 6) - // The sixth value tells us where the start of the action table is. - ActionTableBytes = BytesRead; - } - } - - MCAsmStreamer::EmitFill(NumBytes, FillValue, AddrSpace); -} - -/// EmitEHTableDescription - Emit a human readable version of the LSDA. -void MCLSDADecoderAsmStreamer::EmitEHTableDescription() { - assert(LSDAEncoding.size() > 6 && "Invalid LSDA!"); - - // Emit header information. - StringRef C = MAI.getCommentString(); -#define CMT OS << C << ' ' - CMT << "Exception Handling Table: " << LSDASymbol->getName() << "\n"; - CMT << " @LPStart Encoding: " << DecodeDWARFEncoding(LSDAEncoding[0]) << "\n"; - if (LSDAEncoding[1]) - CMT << "@LPStart: 0x" << LSDAEncoding[1] << "\n"; - CMT << " @TType Encoding: " << DecodeDWARFEncoding(LSDAEncoding[2]) << "\n"; - CMT << " @TType Base: " << LSDAEncoding[3] << " bytes\n"; - CMT << "@CallSite Encoding: " << DecodeDWARFEncoding(LSDAEncoding[4]) << "\n"; - CMT << "@Action Table Size: " << LSDAEncoding[5] << " bytes\n\n"; - - bool isSjLjEH = (MAI.getExceptionHandlingType() == ExceptionHandling::ARM); - - int64_t CallSiteTableSize = LSDAEncoding[5]; - unsigned CallSiteEntrySize; - if (!isSjLjEH) - CallSiteEntrySize = 4 + // Region start. - 4 + // Region end. - 4 + // Landing pad. - 1; // TType index. - else - CallSiteEntrySize = 1 + // Call index. - 1 + // Landing pad. - 1; // TType index. - - unsigned NumEntries = CallSiteTableSize / CallSiteEntrySize; - assert(CallSiteTableSize % CallSiteEntrySize == 0 && - "The action table size is not a multiple of what it should be!"); - unsigned TTypeIdx = 5 + // Action table size index. - (isSjLjEH ? 3 : 4) * NumEntries + // Action table entries. - 1; // Just because. - - // Emit the action table. - unsigned Action = 1; - for (unsigned I = 6; I < TTypeIdx; ) { - CMT << "Action " << Action++ << ":\n"; - - // The beginning of the throwing region. - uint64_t Idx = LSDAEncoding[I++]; - - if (!isSjLjEH) { - CMT << " A throw between " - << *cast(Assignments[Idx - 1])->getLHS() << " and "; - - // The end of the throwing region. - Idx = LSDAEncoding[I++]; - OS << *cast(Assignments[Idx - 1])->getLHS(); - } else { - CMT << " A throw from call " << *Assignments[Idx - 1]; - } - - // The landing pad. - Idx = LSDAEncoding[I++]; - if (Idx) { - OS << " jumps to " - << *cast(Assignments[Idx - 1])->getLHS() - << " on an exception.\n"; - } else { - OS << " does not have a landing pad.\n"; - ++I; - continue; - } - - // The index into the action table. - Idx = LSDAEncoding[I++]; - if (!Idx) { - CMT << " :cleanup:\n"; - continue; - } - - // A semi-graphical representation of what the different indexes are in the - // loop below. - // - // Idx - Index into the action table. - // Action - Index into the type table from the type table base. - // Next - Offset from Idx to the next action type. - // - // Idx---. - // | - // v - // [call site table] _1 _2 _3 - // TTypeIdx--> ......................... - // [action 1] _1 _2 - // [action 2] _1 _2 - // ... - // [action n] _1 _2 - // [type m] ^ - // ... | - // [type 1] `---Next - // - - int Action = LSDAEncoding[TTypeIdx + Idx - 1]; - if ((Action & 0x40) != 0) - // Ignore exception specifications. - continue; - - // Emit the types that are caught by this exception. - CMT << " For type(s): "; - for (;;) { - if ((Action & 0x40) != 0) - // Ignore exception specifications. - break; - - if (uint64_t Ty = LSDAEncoding[LSDAEncoding.size() - Action]) { - OS << " " << *Assignments[Ty - 1]; - - // Types can be chained together. Typically, it's a negative offset from - // the current type to a different one in the type table. - int Next = LSDAEncoding[TTypeIdx + Idx]; - if (Next == 0) - break; - if ((Next & 0x40) != 0) - Next = (int)(signed char)(Next | 0x80); - Idx += Next + 1; - Action = LSDAEncoding[TTypeIdx + Idx - 1]; - continue; - } else { - OS << " :catchall:"; - } - break; - } - - OS << "\n"; - } - - OS << "\n"; - ResetState(); -} - MCStreamer *llvm::createAsmStreamer(MCContext &Context, formatted_raw_ostream &OS, bool isVerboseAsm, bool useLoc, bool useCFI, MCInstPrinter *IP, MCCodeEmitter *CE, TargetAsmBackend *TAB, bool ShowInst) { -#if 0 - if (isVerboseAsm) - return new MCLSDADecoderAsmStreamer(Context, OS, isVerboseAsm, useLoc, - useCFI, IP, CE, TAB, ShowInst); -#endif return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc, useCFI, IP, CE, TAB, ShowInst); }