int Disassembler::disassemble(const Target &T, const std::string &Triple, MCSubtargetInfo &STI, MCStreamer &Streamer, MemoryBuffer &Buffer, SourceMgr &SM, raw_ostream &Out) { OwningPtr<const MCDisassembler> DisAsm(T.createMCDisassembler(STI)); if (!DisAsm) { errs() << "error: no disassembler for target " << Triple << "\n"; return -1; } // Set up initial section manually here Streamer.InitSections(); bool ErrorOccurred = false; // Convert the input to a vector for disassembly. ByteArrayTy ByteArray; StringRef Str = Buffer.getBuffer(); ErrorOccurred |= ByteArrayFromString(ByteArray, Str, SM); if (!ByteArray.empty()) ErrorOccurred |= PrintInsts(*DisAsm, ByteArray, SM, Out, Streamer); return ErrorOccurred; }
static bool PrintInsts(const MCDisassembler &DisAsm, MCInstPrinter &Printer, const ByteArrayTy &Bytes, SourceMgr &SM) { // Wrap the vector in a MemoryObject. VectorMemoryObject memoryObject(Bytes); // Disassemble it to strings. uint64_t Size; uint64_t Index; for (Index = 0; Index < Bytes.size(); Index += Size) { MCInst Inst; if (DisAsm.getInstruction(Inst, Size, memoryObject, Index, /*REMOVE*/ nulls())) { Printer.printInst(&Inst, outs()); outs() << "\n"; } else { SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second), "invalid instruction encoding", "warning"); if (Size == 0) Size = 1; // skip illegible bytes } } return false; }
static bool ByteArrayFromString(ByteArrayTy &ByteArray, StringRef &Str, SourceMgr &SM) { while (!Str.empty()) { // Strip horizontal whitespace. if (size_t Pos = Str.find_first_not_of(" \t\r")) { Str = Str.substr(Pos); continue; } // If this is the end of a line or start of a comment, remove the rest of // the line. if (Str[0] == '\n' || Str[0] == '#') { // Strip to the end of line if we already processed any bytes on this // line. This strips the comment and/or the \n. if (Str[0] == '\n') { Str = Str.substr(1); } else { Str = Str.substr(Str.find_first_of('\n')); if (!Str.empty()) Str = Str.substr(1); } continue; } // Get the current token. size_t Next = Str.find_first_of(" \t\n\r#"); StringRef Value = Str.substr(0, Next); // Convert to a byte and add to the byte vector. unsigned ByteVal; if (Value.getAsInteger(0, ByteVal) || ByteVal > 255) { // If we have an error, print it and skip to the end of line. SM.PrintMessage(SMLoc::getFromPointer(Value.data()), SourceMgr::DK_Error, "invalid input token"); Str = Str.substr(Str.find('\n')); ByteArray.clear(); continue; } ByteArray.push_back(std::make_pair((unsigned char)ByteVal, Value.data())); Str = Str.substr(Next); } return false; }
int Disassembler::disassemble(const Target &T, const std::string &Triple, MemoryBuffer &Buffer) { // Set up disassembler. OwningPtr<const MCAsmInfo> AsmInfo(T.createAsmInfo(Triple)); if (!AsmInfo) { errs() << "error: no assembly info for target " << Triple << "\n"; return -1; } OwningPtr<const MCDisassembler> DisAsm(T.createMCDisassembler()); if (!DisAsm) { errs() << "error: no disassembler for target " << Triple << "\n"; return -1; } int AsmPrinterVariant = AsmInfo->getAssemblerDialect(); OwningPtr<MCInstPrinter> IP(T.createMCInstPrinter(AsmPrinterVariant, *AsmInfo)); if (!IP) { errs() << "error: no instruction printer for target " << Triple << '\n'; return -1; } bool ErrorOccurred = false; SourceMgr SM; SM.AddNewSourceBuffer(&Buffer, SMLoc()); // Convert the input to a vector for disassembly. ByteArrayTy ByteArray; StringRef Str = Buffer.getBuffer(); ErrorOccurred |= ByteArrayFromString(ByteArray, Str, SM); if (!ByteArray.empty()) ErrorOccurred |= PrintInsts(*DisAsm, *IP, ByteArray, SM); return ErrorOccurred; }
static bool PrintInsts(const MCDisassembler &DisAsm, const ByteArrayTy &Bytes, SourceMgr &SM, raw_ostream &Out, MCStreamer &Streamer) { // Wrap the vector in a MemoryObject. VectorMemoryObject memoryObject(Bytes); // Disassemble it to strings. uint64_t Size; uint64_t Index; for (Index = 0; Index < Bytes.size(); Index += Size) { MCInst Inst; MCDisassembler::DecodeStatus S; S = DisAsm.getInstruction(Inst, Size, memoryObject, Index, /*REMOVE*/ nulls(), nulls()); switch (S) { case MCDisassembler::Fail: SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second), SourceMgr::DK_Warning, "invalid instruction encoding"); if (Size == 0) Size = 1; // skip illegible bytes break; case MCDisassembler::SoftFail: SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second), SourceMgr::DK_Warning, "potentially undefined instruction encoding"); // Fall through case MCDisassembler::Success: Streamer.EmitInstruction(Inst); break; } } return false; }
int Disassembler::disassembleEnhanced(const std::string &TS, MemoryBuffer &Buffer, raw_ostream &Out) { ByteArrayTy ByteArray; StringRef Str = Buffer.getBuffer(); SourceMgr SM; SM.AddNewSourceBuffer(&Buffer, SMLoc()); if (ByteArrayFromString(ByteArray, Str, SM)) { return -1; } Triple T(TS); EDDisassembler::AssemblySyntax AS; switch (T.getArch()) { default: errs() << "error: no default assembly syntax for " << TS.c_str() << "\n"; return -1; case Triple::arm: case Triple::thumb: AS = EDDisassembler::kEDAssemblySyntaxARMUAL; break; case Triple::x86: case Triple::x86_64: AS = EDDisassembler::kEDAssemblySyntaxX86ATT; break; } OwningPtr<EDDisassembler> disassembler(EDDisassembler::getDisassembler(TS.c_str(), AS)); if (disassembler == 0) { errs() << "error: couldn't get disassembler for " << TS << '\n'; return -1; } while (ByteArray.size()) { OwningPtr<EDInst> inst(disassembler->createInst(byteArrayReader, 0, &ByteArray)); if (inst == 0) { errs() << "error: Didn't get an instruction\n"; return -1; } ByteArray.erase (ByteArray.begin(), ByteArray.begin() + inst->byteSize()); unsigned numTokens = inst->numTokens(); if ((int)numTokens < 0) { errs() << "error: couldn't count the instruction's tokens\n"; return -1; } for (unsigned tokenIndex = 0; tokenIndex != numTokens; ++tokenIndex) { EDToken *token; if (inst->getToken(token, tokenIndex)) { errs() << "error: Couldn't get token\n"; return -1; } const char *buf; if (token->getString(buf)) { errs() << "error: Couldn't get string for token\n"; return -1; } Out << '['; int operandIndex = token->operandID(); if (operandIndex >= 0) Out << operandIndex << "-"; switch (token->type()) { case EDToken::kTokenWhitespace: Out << "w"; break; case EDToken::kTokenPunctuation: Out << "p"; break; case EDToken::kTokenOpcode: Out << "o"; break; case EDToken::kTokenLiteral: Out << "l"; break; case EDToken::kTokenRegister: Out << "r"; break; } Out << ":" << buf; if (token->type() == EDToken::kTokenLiteral) { Out << "="; if (token->literalSign()) Out << "-"; uint64_t absoluteValue; if (token->literalAbsoluteValue(absoluteValue)) { errs() << "error: Couldn't get the value of a literal token\n"; return -1; } Out << absoluteValue; } else if (token->type() == EDToken::kTokenRegister) { Out << "="; unsigned regID; if (token->registerID(regID)) { errs() << "error: Couldn't get the ID of a register token\n"; return -1; } Out << "r" << regID; } Out << "]"; } Out << " "; if (inst->isBranch()) Out << "<br> "; if (inst->isMove()) Out << "<mov> "; unsigned numOperands = inst->numOperands(); if ((int)numOperands < 0) { errs() << "error: Couldn't count operands\n"; return -1; } for (unsigned operandIndex = 0; operandIndex != numOperands; ++operandIndex) { Out << operandIndex << ":"; EDOperand *operand; if (inst->getOperand(operand, operandIndex)) { errs() << "error: couldn't get operand\n"; return -1; } uint64_t evaluatedResult; void *Arg[] = { disassembler.get(), &Out }; if (operand->evaluate(evaluatedResult, verboseEvaluator, Arg)) { errs() << "error: Couldn't evaluate an operand\n"; return -1; } Out << "=" << evaluatedResult << " "; } Out << '\n'; } return 0; }