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 "UDis86Disassembler.h"
28
29#if USE(UDIS86)
30
31#include "MacroAssemblerCodeRef.h"
32#include "udis86.h"
33
34namespace JSC {
35
36bool tryToDisassembleWithUDis86(const MacroAssemblerCodePtr<DisassemblyPtrTag>& codePtr, size_t size, const char* prefix, PrintStream& out)
37{
38 ud_t disassembler;
39 ud_init(&disassembler);
40 ud_set_input_buffer(&disassembler, codePtr.untaggedExecutableAddress<unsigned char*>(), 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, codePtr.untaggedExecutableAddress<uintptr_t>());
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%" PRIxPTR, static_cast<uintptr_t>(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
64