| //===-- DisassemblerHelper.h ------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// Helper class for decoding machine instructions and printing them in an |
| /// assembler form. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TOOLS_LLVM_EXEGESIS_DISASSEMBLER_HELPER_H |
| #define LLVM_TOOLS_LLVM_EXEGESIS_DISASSEMBLER_HELPER_H |
| |
| #include "LlvmState.h" |
| #include "llvm/MC/MCAsmInfo.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCDisassembler/MCDisassembler.h" |
| #include "llvm/MC/MCInstPrinter.h" |
| |
| #include <memory> |
| |
| namespace llvm { |
| namespace exegesis { |
| |
| // A helper class for decoding and printing machine instructions. |
| class DisassemblerHelper { |
| public: |
| DisassemblerHelper(const LLVMState &State); |
| |
| void printInst(const MCInst *MI, raw_ostream &OS) const { |
| const auto &STI = State_.getSubtargetInfo(); |
| InstPrinter_->printInst(MI, 0, "", STI, OS); |
| } |
| |
| bool decodeInst(MCInst &MI, uint64_t &MISize, ArrayRef<uint8_t> Bytes) const { |
| return Disasm_->getInstruction(MI, MISize, Bytes, 0, nulls()); |
| } |
| |
| private: |
| const LLVMState &State_; |
| std::unique_ptr<MCContext> Context_; |
| std::unique_ptr<MCAsmInfo> AsmInfo_; |
| std::unique_ptr<MCInstPrinter> InstPrinter_; |
| std::unique_ptr<MCDisassembler> Disasm_; |
| }; |
| |
| } // namespace exegesis |
| } // namespace llvm |
| |
| #endif // LLVM_TOOLS_LLVM_EXEGESIS_DISASSEMBLER_HELPER_H |