llvm/llvm/lib/Target/BPF/Disassembler/BPFDisassembler.cpp

//===- BPFDisassembler.cpp - Disassembler for BPF ---------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file is part of the BPF Disassembler.
//
//===----------------------------------------------------------------------===//

#include "MCTargetDesc/BPFMCTargetDesc.h"
#include "TargetInfo/BPFTargetInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDecoderOps.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/TargetParser/SubtargetFeature.h"
#include <cstdint>

usingnamespacellvm;

#define DEBUG_TYPE …

DecodeStatus;

namespace {

/// A disassembler class for BPF.
class BPFDisassembler : public MCDisassembler { … };

} // end anonymous namespace

static MCDisassembler *createBPFDisassembler(const Target &T,
                                             const MCSubtargetInfo &STI,
                                             MCContext &Ctx) { … }


extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeBPFDisassembler() { … }

static const unsigned GPRDecoderTable[] = …;

static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
                                           uint64_t /*Address*/,
                                           const MCDisassembler * /*Decoder*/) { … }

static const unsigned GPR32DecoderTable[] = …;

static DecodeStatus
DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
                         const MCDisassembler * /*Decoder*/) { … }

static DecodeStatus decodeMemoryOpValue(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder) { … }

#include "BPFGenDisassemblerTables.inc"
static DecodeStatus readInstruction64(ArrayRef<uint8_t> Bytes, uint64_t Address,
                                      uint64_t &Size, uint64_t &Insn,
                                      bool IsLittleEndian) { … }

DecodeStatus BPFDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
                                             ArrayRef<uint8_t> Bytes,
                                             uint64_t Address,
                                             raw_ostream &CStream) const { … }

DecodeFunc;