1 | /* |
2 | * Copyright (C) 2012 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(UDIS86) |
30 | |
31 | #include "MacroAssemblerCodeRef.h" |
32 | #include "udis86.h" |
33 | |
34 | namespace JSC { |
35 | |
36 | namespace { |
37 | template <int> struct helper; |
38 | template <> struct helper<4> { |
39 | static void hex(char *str, size_t len, uint64_t pc) |
40 | { snprintf(str, len, "0x%x" , static_cast<uint32_t>(pc)); } |
41 | }; |
42 | template <> struct helper<8> { |
43 | static void hex(char *str, size_t len, uint64_t pc) |
44 | { snprintf(str, len, "0x%llx" , static_cast<unsigned long long>(pc)); } |
45 | }; |
46 | inline void print(char *str, size_t len, uint64_t pc) |
47 | { helper<sizeof(void*)>::hex(str, len, pc); } |
48 | } |
49 | |
50 | bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out) |
51 | { |
52 | ud_t disassembler; |
53 | ud_init(&disassembler); |
54 | ud_set_input_buffer(&disassembler, static_cast<unsigned char*>(codePtr.executableAddress()), size); |
55 | #if CPU(X86_64) |
56 | ud_set_mode(&disassembler, 64); |
57 | #else |
58 | ud_set_mode(&disassembler, 32); |
59 | #endif |
60 | ud_set_pc(&disassembler, bitwise_cast<uintptr_t>(codePtr.executableAddress())); |
61 | ud_set_syntax(&disassembler, UD_SYN_ATT); |
62 | |
63 | uint64_t currentPC = disassembler.pc; |
64 | while (ud_disassemble(&disassembler)) { |
65 | char pcString[20]; |
66 | print(pcString, sizeof(pcString), currentPC); |
67 | out.printf("%s%16s: %s\n" , prefix, pcString, ud_insn_asm(&disassembler)); |
68 | currentPC = disassembler.pc; |
69 | } |
70 | |
71 | return true; |
72 | } |
73 | |
74 | } // namespace JSC |
75 | |
76 | #endif // USE(UDIS86) |
77 | |
78 | |