// // LLVMSetDisasmOptions() sets the disassembler's options. It returns 1 if it // can set all the Options and 0 otherwise. // int LLVMSetDisasmOptions(LLVMDisasmContextRef DCR, uint64_t Options){ if (Options & LLVMDisassembler_Option_UseMarkup){ LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR; MCInstPrinter *IP = DC->getIP(); IP->setUseMarkup(1); Options &= ~LLVMDisassembler_Option_UseMarkup; } return (Options == 0); }
// // LLVMDisasmInstruction() disassembles a single instruction using the // disassembler context specified in the parameter DC. The bytes of the // instruction are specified in the parameter Bytes, and contains at least // BytesSize number of bytes. The instruction is at the address specified by // the PC parameter. If a valid instruction can be disassembled its string is // returned indirectly in OutString which whos size is specified in the // parameter OutStringSize. This function returns the number of bytes in the // instruction or zero if there was no valid instruction. If this function // returns zero the caller will have to pick how many bytes they want to step // over by printing a .byte, .long etc. to continue. // size_t LLVMDisasmInstruction(LLVMDisasmContextRef DCR, uint8_t *Bytes, uint64_t BytesSize, uint64_t PC, char *OutString, size_t OutStringSize){ LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR; // Wrap the pointer to the Bytes, BytesSize and PC in a MemoryObject. DisasmMemoryObject MemoryObject(Bytes, BytesSize, PC); uint64_t Size; MCInst Inst; const MCDisassembler *DisAsm = DC->getDisAsm(); MCInstPrinter *IP = DC->getIP(); MCDisassembler::DecodeStatus S; SmallVector<char, 64> InsnStr; raw_svector_ostream Annotations(InsnStr); S = DisAsm->getInstruction(Inst, Size, MemoryObject, PC, /*REMOVE*/ nulls(), Annotations); switch (S) { case MCDisassembler::Fail: case MCDisassembler::SoftFail: // FIXME: Do something different for soft failure modes? return 0; case MCDisassembler::Success: { Annotations.flush(); StringRef AnnotationsStr = Annotations.str(); SmallVector<char, 64> InsnStr; raw_svector_ostream OS(InsnStr); formatted_raw_ostream FormattedOS(OS); IP->printInst(&Inst, FormattedOS, AnnotationsStr); if (DC->getOptions() & LLVMDisassembler_Option_PrintLatency) emitLatency(DC, Inst); emitComments(DC, FormattedOS); OS.flush(); assert(OutStringSize != 0 && "Output buffer cannot be zero size"); size_t OutputSize = std::min(OutStringSize-1, InsnStr.size()); std::memcpy(OutString, InsnStr.data(), OutputSize); OutString[OutputSize] = '\0'; // Terminate string. return Size; } } llvm_unreachable("Invalid DecodeStatus!"); }
// // LLVMDisasmInstruction() disassembles a single instruction using the // disassembler context specified in the parameter DC. The bytes of the // instruction are specified in the parameter Bytes, and contains at least // BytesSize number of bytes. The instruction is at the address specified by // the PC parameter. If a valid instruction can be disassembled its string is // returned indirectly in OutString which whos size is specified in the // parameter OutStringSize. This function returns the number of bytes in the // instruction or zero if there was no valid instruction. If this function // returns zero the caller will have to pick how many bytes they want to step // over by printing a .byte, .long etc. to continue. // size_t LLVMDisasmInstruction(LLVMDisasmContextRef DCR, uint8_t *Bytes, uint64_t BytesSize, uint64_t PC, char *OutString, size_t OutStringSize){ LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR; // Wrap the pointer to the Bytes, BytesSize and PC in a MemoryObject. DisasmMemoryObject MemoryObject(Bytes, BytesSize, PC); uint64_t Size; MCInst Inst; const MCDisassembler *DisAsm = DC->getDisAsm(); MCInstPrinter *IP = DC->getIP(); MCDisassembler::DecodeStatus S; S = DisAsm->getInstruction(Inst, Size, MemoryObject, PC, /*REMOVE*/ nulls(), DC->CommentStream); switch (S) { case MCDisassembler::Fail: case MCDisassembler::SoftFail: // FIXME: Do something different for soft failure modes? return 0; case MCDisassembler::Success: { DC->CommentStream.flush(); StringRef Comments = DC->CommentsToEmit.str(); SmallVector<char, 64> InsnStr; raw_svector_ostream OS(InsnStr); IP->printInst(&Inst, OS, Comments); OS.flush(); // Tell the comment stream that the vector changed underneath it. DC->CommentsToEmit.clear(); DC->CommentStream.resync(); assert(OutStringSize != 0 && "Output buffer cannot be zero size"); size_t OutputSize = std::min(OutStringSize-1, InsnStr.size()); std::memcpy(OutString, InsnStr.data(), OutputSize); OutString[OutputSize] = '\0'; // Terminate string. return Size; } } llvm_unreachable("Invalid DecodeStatus!"); }
// // LLVMSetDisasmOptions() sets the disassembler's options. It returns 1 if it // can set all the Options and 0 otherwise. // int LLVMSetDisasmOptions(LLVMDisasmContextRef DCR, uint64_t Options){ if (Options & LLVMDisassembler_Option_UseMarkup){ LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR; MCInstPrinter *IP = DC->getIP(); IP->setUseMarkup(1); Options &= ~LLVMDisassembler_Option_UseMarkup; } if (Options & LLVMDisassembler_Option_PrintImmHex){ LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR; MCInstPrinter *IP = DC->getIP(); IP->setPrintImmHex(1); Options &= ~LLVMDisassembler_Option_PrintImmHex; } if (Options & LLVMDisassembler_Option_AsmPrinterVariant){ LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR; // Try to set up the new instruction printer. const MCAsmInfo *MAI = DC->getAsmInfo(); const MCInstrInfo *MII = DC->getInstrInfo(); const MCRegisterInfo *MRI = DC->getRegisterInfo(); const MCSubtargetInfo *STI = DC->getSubtargetInfo(); int AsmPrinterVariant = MAI->getAssemblerDialect(); AsmPrinterVariant = AsmPrinterVariant == 0 ? 1 : 0; MCInstPrinter *IP = DC->getTarget()->createMCInstPrinter( AsmPrinterVariant, *MAI, *MII, *MRI, *STI); if (IP) { DC->setIP(IP); Options &= ~LLVMDisassembler_Option_AsmPrinterVariant; } } return (Options == 0); }
// LLVMCreateDisasm() creates a disassembler for the TripleName. Symbolic // disassembly is supported by passing a block of information in the DisInfo // parameter and specifying the TagType and callback functions as described in // the header llvm-c/Disassembler.h . The pointer to the block and the // functions can all be passed as NULL. If successful, this returns a // disassembler context. If not, it returns NULL. // LLVMDisasmContextRef LLVMCreateDisasmCPU(const char *Triple, const char *CPU, void *DisInfo, int TagType, LLVMOpInfoCallback GetOpInfo, LLVMSymbolLookupCallback SymbolLookUp){ // Get the target. std::string Error; const Target *TheTarget = TargetRegistry::lookupTarget(Triple, Error); if (!TheTarget) return nullptr; const MCRegisterInfo *MRI = TheTarget->createMCRegInfo(Triple); if (!MRI) return nullptr; // Get the assembler info needed to setup the MCContext. const MCAsmInfo *MAI = TheTarget->createMCAsmInfo(*MRI, Triple); if (!MAI) return nullptr; const MCInstrInfo *MII = TheTarget->createMCInstrInfo(); if (!MII) return nullptr; // Package up features to be passed to target/subtarget std::string FeaturesStr; const MCSubtargetInfo *STI = TheTarget->createMCSubtargetInfo(Triple, CPU, FeaturesStr); if (!STI) return nullptr; // Set up the MCContext for creating symbols and MCExpr's. MCContext *Ctx = new MCContext(MAI, MRI, nullptr); if (!Ctx) return nullptr; // Set up disassembler. MCDisassembler *DisAsm = TheTarget->createMCDisassembler(*STI, *Ctx); if (!DisAsm) return nullptr; std::unique_ptr<MCRelocationInfo> RelInfo( TheTarget->createMCRelocationInfo(Triple, *Ctx)); if (!RelInfo) return nullptr; std::unique_ptr<MCSymbolizer> Symbolizer(TheTarget->createMCSymbolizer( Triple, GetOpInfo, SymbolLookUp, DisInfo, Ctx, RelInfo.release())); DisAsm->setSymbolizer(std::move(Symbolizer)); // Set up the instruction printer. int AsmPrinterVariant = MAI->getAssemblerDialect(); MCInstPrinter *IP = TheTarget->createMCInstPrinter(AsmPrinterVariant, *MAI, *MII, *MRI, *STI); if (!IP) return nullptr; LLVMDisasmContext *DC = new LLVMDisasmContext(Triple, DisInfo, TagType, GetOpInfo, SymbolLookUp, TheTarget, MAI, MRI, STI, MII, Ctx, DisAsm, IP); if (!DC) return nullptr; DC->setCPU(CPU); return DC; }
// // LLVMSetDisasmOptions() sets the disassembler's options. It returns 1 if it // can set all the Options and 0 otherwise. // int LLVMSetDisasmOptions(LLVMDisasmContextRef DCR, uint64_t Options){ if (Options & LLVMDisassembler_Option_UseMarkup){ LLVMDisasmContext *DC = static_cast<LLVMDisasmContext *>(DCR); MCInstPrinter *IP = DC->getIP(); IP->setUseMarkup(true); DC->addOptions(LLVMDisassembler_Option_UseMarkup); Options &= ~LLVMDisassembler_Option_UseMarkup; } if (Options & LLVMDisassembler_Option_PrintImmHex){ LLVMDisasmContext *DC = static_cast<LLVMDisasmContext *>(DCR); MCInstPrinter *IP = DC->getIP(); IP->setPrintImmHex(true); DC->addOptions(LLVMDisassembler_Option_PrintImmHex); Options &= ~LLVMDisassembler_Option_PrintImmHex; } if (Options & LLVMDisassembler_Option_AsmPrinterVariant){ LLVMDisasmContext *DC = static_cast<LLVMDisasmContext *>(DCR); // Try to set up the new instruction printer. const MCAsmInfo *MAI = DC->getAsmInfo(); const MCInstrInfo *MII = DC->getInstrInfo(); const MCRegisterInfo *MRI = DC->getRegisterInfo(); int AsmPrinterVariant = MAI->getAssemblerDialect(); AsmPrinterVariant = AsmPrinterVariant == 0 ? 1 : 0; MCInstPrinter *IP = DC->getTarget()->createMCInstPrinter( Triple(DC->getTripleName()), AsmPrinterVariant, *MAI, *MII, *MRI); if (IP) { DC->setIP(IP); DC->addOptions(LLVMDisassembler_Option_AsmPrinterVariant); Options &= ~LLVMDisassembler_Option_AsmPrinterVariant; } } if (Options & LLVMDisassembler_Option_SetInstrComments) { LLVMDisasmContext *DC = static_cast<LLVMDisasmContext *>(DCR); MCInstPrinter *IP = DC->getIP(); IP->setCommentStream(DC->CommentStream); DC->addOptions(LLVMDisassembler_Option_SetInstrComments); Options &= ~LLVMDisassembler_Option_SetInstrComments; } if (Options & LLVMDisassembler_Option_PrintLatency) { LLVMDisasmContext *DC = static_cast<LLVMDisasmContext *>(DCR); DC->addOptions(LLVMDisassembler_Option_PrintLatency); Options &= ~LLVMDisassembler_Option_PrintLatency; } return (Options == 0); }