1  /*
 2   * Copyright (C) 2012-2018 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 ENABLE(ARM64_DISASSEMBLER)
30  
31  #include "A64DOpcode.h"
32  #include "MacroAssemblerCodeRef.h"
33  
34  namespace JSC {
35  
36  bool tryToDisassemble(const MacroAssemblerCodePtr<DisassemblyPtrTag>& codePtr, size_t size, const char* prefix, PrintStream& out)
37  {
38      A64DOpcode arm64Opcode;
39  
40      uint32_t* currentPC = codePtr.untaggedExecutableAddress<uint32_t*>();
41      size_t byteCount = size;
42  
43      while (byteCount) {
44          char pcString[20];
45          snprintf(pcString, sizeof(pcString), "0x%lx", reinterpret_cast<unsigned long>(currentPC));
46          out.printf("%s%16s: %s\n", prefix, pcString, arm64Opcode.disassemble(currentPC));
47          currentPC++;
48          byteCount -= sizeof(uint32_t);
49      }
50  
51      return true;
52  }
53  
54  } // namespace JSC
55  
56  #endif // ENABLE(ARM64_DISASSEMBLER)
57