disassembler/ARMv7Disassembler.cpp

   1 /*
   2  * Copyright (C) 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 "Disassembler.h"
  28
  29 #if USE(ARMV7_DISASSEMBLER)
  30
  31 #include "ARMv7/ARMv7DOpcode.h"
  32 #include "MacroAssemblerCodeRef.h"
  33
  34 namespace JSC {
  35
  36 bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out, InstructionSubsetHint)
  37 {
  38     ARMv7DOpcode armOpcode;
  39
  40     uint16_t* currentPC = reinterpret_cast<uint16_t*>(reinterpret_cast<uintptr_t>(codePtr.executableAddress())&~1);
  41     uint16_t* endPC = currentPC + (size / sizeof(uint16_t));
  42
  43     while (currentPC < endPC) {
  44         char pcString[12];
  45         snprintf(pcString, sizeof(pcString), "0x%x", reinterpret_cast<unsigned>(currentPC));
  46         out.printf("%s%10s: %s\n", prefix, pcString, armOpcode.disassemble(currentPC));
  47     }
  48
  49     return true;
  50 }
  51
  52 } // namespace JSC
  53
  54 #endif // USE(ARMV7_DISASSEMBLER)
  55