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      1 // Copyright 2007-2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #ifndef V8_DISASM_H_
     29 #define V8_DISASM_H_
     30 
     31 namespace disasm {
     32 
     33 typedef unsigned char byte;
     34 
     35 // Interface and default implementation for converting addresses and
     36 // register-numbers to text.  The default implementation is machine
     37 // specific.
     38 class NameConverter {
     39  public:
     40   virtual ~NameConverter() {}
     41   virtual const char* NameOfCPURegister(int reg) const;
     42   virtual const char* NameOfByteCPURegister(int reg) const;
     43   virtual const char* NameOfXMMRegister(int reg) const;
     44   virtual const char* NameOfAddress(byte* addr) const;
     45   virtual const char* NameOfConstant(byte* addr) const;
     46   virtual const char* NameInCode(byte* addr) const;
     47 
     48  protected:
     49   v8::internal::EmbeddedVector<char, 128> tmp_buffer_;
     50 };
     51 
     52 
     53 // A generic Disassembler interface
     54 class Disassembler {
     55  public:
     56   // Caller deallocates converter.
     57   explicit Disassembler(const NameConverter& converter);
     58 
     59   virtual ~Disassembler();
     60 
     61   // Writes one disassembled instruction into 'buffer' (0-terminated).
     62   // Returns the length of the disassembled machine instruction in bytes.
     63   int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction);
     64 
     65   // Returns -1 if instruction does not mark the beginning of a constant pool,
     66   // or the number of entries in the constant pool beginning here.
     67   int ConstantPoolSizeAt(byte* instruction);
     68 
     69   // Write disassembly into specified file 'f' using specified NameConverter
     70   // (see constructor).
     71   static void Disassemble(FILE* f, byte* begin, byte* end);
     72  private:
     73   const NameConverter& converter_;
     74 
     75   DISALLOW_IMPLICIT_CONSTRUCTORS(Disassembler);
     76 };
     77 
     78 }  // namespace disasm
     79 
     80 #endif  // V8_DISASM_H_
     81