1 //==- WebAssemblyDisassembler.cpp - Disassembler for WebAssembly -*- C++ -*-==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 /// 10 /// \file 11 /// This file is part of the WebAssembly Disassembler. 12 /// 13 /// It contains code to translate the data produced by the decoder into 14 /// MCInsts. 15 /// 16 //===----------------------------------------------------------------------===// 17 18 #include "MCTargetDesc/WebAssemblyMCTargetDesc.h" 19 #include "WebAssembly.h" 20 #include "llvm/MC/MCContext.h" 21 #include "llvm/MC/MCDisassembler/MCDisassembler.h" 22 #include "llvm/MC/MCInst.h" 23 #include "llvm/MC/MCInstrInfo.h" 24 #include "llvm/MC/MCSubtargetInfo.h" 25 #include "llvm/MC/MCSymbol.h" 26 #include "llvm/Support/Endian.h" 27 #include "llvm/Support/TargetRegistry.h" 28 using namespace llvm; 29 30 #define DEBUG_TYPE "wasm-disassembler" 31 32 namespace { 33 class WebAssemblyDisassembler final : public MCDisassembler { 34 std::unique_ptr<const MCInstrInfo> MCII; 35 36 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, 37 ArrayRef<uint8_t> Bytes, uint64_t Address, 38 raw_ostream &VStream, 39 raw_ostream &CStream) const override; 40 41 public: 42 WebAssemblyDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, 43 std::unique_ptr<const MCInstrInfo> MCII) 44 : MCDisassembler(STI, Ctx), MCII(std::move(MCII)) {} 45 }; 46 } // end anonymous namespace 47 48 static MCDisassembler *createWebAssemblyDisassembler(const Target &T, 49 const MCSubtargetInfo &STI, 50 MCContext &Ctx) { 51 std::unique_ptr<const MCInstrInfo> MCII(T.createMCInstrInfo()); 52 return new WebAssemblyDisassembler(STI, Ctx, std::move(MCII)); 53 } 54 55 extern "C" void LLVMInitializeWebAssemblyDisassembler() { 56 // Register the disassembler for each target. 57 TargetRegistry::RegisterMCDisassembler(getTheWebAssemblyTarget32(), 58 createWebAssemblyDisassembler); 59 TargetRegistry::RegisterMCDisassembler(getTheWebAssemblyTarget64(), 60 createWebAssemblyDisassembler); 61 } 62 63 MCDisassembler::DecodeStatus WebAssemblyDisassembler::getInstruction( 64 MCInst &MI, uint64_t &Size, ArrayRef<uint8_t> Bytes, uint64_t /*Address*/, 65 raw_ostream &OS, raw_ostream &CS) const { 66 67 // TODO: Implement disassembly. 68 69 return MCDisassembler::Fail; 70 } 71