1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* Copyright (C) 2012-2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "AssemblyComments.h"
#include "Disassembler.h"
#if ENABLE(ARM64_DISASSEMBLER)
#include "A64DOpcode.h"
#include "MacroAssemblerCodeRef.h"
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
bool tryToDisassemble(const CodePtr<DisassemblyPtrTag>& codePtr, size_t size, void* codeStart, void* codeEnd, const char* prefix, PrintStream& out)
{
uint32_t* currentPC = codePtr.untaggedPtr<uint32_t*>();
size_t byteCount = size;
uint32_t* armCodeStart = std::bit_cast<uint32_t*>(codeStart);
uint32_t* armCodeEnd = std::bit_cast<uint32_t*>(codeEnd);
A64DOpcode arm64Opcode(armCodeStart, armCodeEnd);
unsigned pcOffset = (currentPC - armCodeStart) * sizeof(uint32_t);
char pcInfo[25];
while (byteCount) {
if (codeStart)
snprintf(pcInfo, sizeof(pcInfo) - 1, "<%u> %#llx", pcOffset, static_cast<unsigned long long>(std::bit_cast<uintptr_t>(currentPC)));
else
snprintf(pcInfo, sizeof(pcInfo) - 1, "%#llx", static_cast<unsigned long long>(std::bit_cast<uintptr_t>(currentPC)));
out.printf("%s%24s: %s", prefix, pcInfo, arm64Opcode.disassemble(currentPC));
if (auto str = AssemblyCommentRegistry::singleton().comment(currentPC))
out.printf("; %s\n", str->ascii().data());
else
out.printf("\n");
pcOffset += sizeof(uint32_t);
currentPC++;
byteCount -= sizeof(uint32_t);
}
return true;
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif // ENABLE(ARM64_DISASSEMBLER)
|
