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ARM64Disassembler.cpp
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/*
* 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)
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