disassembler/UDis86Disassembler.cpp

   1 /*
   2  * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "UDis86Disassembler.h"
  28
  29 #if USE(UDIS86)
  30
  31 #include "MacroAssemblerCodeRef.h"
  32 #include "udis86.h"
  33
  34 namespace JSC {
  35
  36 bool tryToDisassembleWithUDis86(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out, InstructionSubsetHint)
  37 {
  38     ud_t disassembler;
  39     ud_init(&disassembler);
  40     ud_set_input_buffer(&disassembler, static_cast<unsigned char*>(codePtr.executableAddress()), size);
  41 #if CPU(X86_64)
  42     ud_set_mode(&disassembler, 64);
  43 #else
  44     ud_set_mode(&disassembler, 32);
  45 #endif
  46     ud_set_pc(&disassembler, bitwise_cast<uintptr_t>(codePtr.executableAddress()));
  47     ud_set_syntax(&disassembler, UD_SYN_ATT);
  48
  49     uint64_t currentPC = disassembler.pc;
  50     while (ud_disassemble(&disassembler)) {
  51         char pcString[20];
  52         snprintf(pcString, sizeof(pcString), "0x%lx", static_cast<unsigned long>(currentPC));
  53         out.printf("%s%16s: %s\n", prefix, pcString, ud_insn_asm(&disassembler));
  54         currentPC = disassembler.pc;
  55     }
  56
  57     return true;
  58 }
  59
  60 } // namespace JSC
  61
  62 #endif // USE(UDIS86)
  63