1// Copyright 2007-2008 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_DISASM_H_
6#define V8_DISASM_H_
7
8#include "src/utils.h"
9
10namespace disasm {
11
12typedef unsigned char byte;
13
14// Interface and default implementation for converting addresses and
15// register-numbers to text.  The default implementation is machine
16// specific.
17class NameConverter {
18 public:
19  virtual ~NameConverter() {}
20  virtual const char* NameOfCPURegister(int reg) const;
21  virtual const char* NameOfByteCPURegister(int reg) const;
22  virtual const char* NameOfXMMRegister(int reg) const;
23  virtual const char* NameOfAddress(byte* addr) const;
24  virtual const char* NameOfConstant(byte* addr) const;
25  virtual const char* NameInCode(byte* addr) const;
26
27 protected:
28  v8::internal::EmbeddedVector<char, 128> tmp_buffer_;
29};
30
31
32// A generic Disassembler interface
33class Disassembler {
34 public:
35  // Caller deallocates converter.
36  explicit Disassembler(const NameConverter& converter);
37
38  virtual ~Disassembler();
39
40  // Writes one disassembled instruction into 'buffer' (0-terminated).
41  // Returns the length of the disassembled machine instruction in bytes.
42  int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction);
43
44  // Returns -1 if instruction does not mark the beginning of a constant pool,
45  // or the number of entries in the constant pool beginning here.
46  int ConstantPoolSizeAt(byte* instruction);
47
48  // Write disassembly into specified file 'f' using specified NameConverter
49  // (see constructor).
50  static void Disassemble(FILE* f, byte* begin, byte* end);
51 private:
52  const NameConverter& converter_;
53
54  DISALLOW_IMPLICIT_CONSTRUCTORS(Disassembler);
55};
56
57}  // namespace disasm
58
59#endif  // V8_DISASM_H_
60