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(ARM_LLVM_DISASSEMBLER)
30
31#include "MacroAssemblerCodeRef.h"
32#include <llvm-c/Disassembler.h>
33#include <llvm-c/Target.h>
34
35namespace JSC {
36
37bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out)
38{
39 LLVMInitializeAllTargetInfos();
40 LLVMInitializeAllTargetMCs();
41 LLVMInitializeAllDisassemblers();
42
43 const char* triple = "armv7-unknown-linux-gnueabihf";
44 LLVMDisasmContextRef disassemblyContext = LLVMCreateDisasm(triple, 0, 0, 0, 0);
45
46 RELEASE_ASSERT(disassemblyContext);
47
48 char pcString[20];
49 char instructionString[100];
50
51 uint8_t* pc = static_cast<uint8_t*>(codePtr.executableAddress());
52 uint8_t* end = pc + size;
53
54 while (pc < end) {
55 snprintf(
56 pcString, sizeof(pcString), "0x%lx",
57 static_cast<unsigned long>(bitwise_cast<uintptr_t>(pc)));
58
59 size_t instructionSize = LLVMDisasmInstruction(
60 disassemblyContext, pc, end - pc, bitwise_cast<uintptr_t>(pc),
61 instructionString, sizeof(instructionString));
62
63 if (!instructionSize)
64 snprintf(instructionString, sizeof(instructionString), "unknown instruction");
65
66 out.printf("%s%16s: [0x%08lx] %s\n", prefix, pcString, *(static_cast<unsigned long*>(pc)), instructionString);
67 pc += 4;
68 }
69
70 LLVMDisasmDispose(disassemblyContext);
71 return true;
72}
73
74} // namespace JSC
75
76#endif // USE(ARM_LLVM_DISASSEMBLER)