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92 lines
3.4 KiB
92 lines
3.4 KiB
#!/usr/bin/env python
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#
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# Copyright 2011 the V8 project authors. All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import os
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import re
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import subprocess
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import tempfile
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# Avoid using the slow (google-specific) wrapper around objdump.
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OBJDUMP_BIN = "/usr/bin/objdump"
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if not os.path.exists(OBJDUMP_BIN):
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OBJDUMP_BIN = "objdump"
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_COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C"]
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_DISASM_HEADER_RE = re.compile(r"[a-f0-9]+\s+<.*:$")
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_DISASM_LINE_RE = re.compile(r"\s*([a-f0-9]+):\s*(\S.*)")
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# Keys must match constants in Logger::LogCodeInfo.
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_ARCH_MAP = {
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"ia32": "-m i386",
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"x64": "-m i386 -M x86-64",
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"arm": "-m arm" # Not supported by our objdump build.
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}
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def GetDisasmLines(filename, offset, size, arch, inplace):
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tmp_name = None
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if not inplace:
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# Create a temporary file containing a copy of the code.
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assert arch in _ARCH_MAP, "Unsupported architecture '%s'" % arch
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arch_flags = _ARCH_MAP[arch]
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tmp_name = tempfile.mktemp(".v8code")
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command = "dd if=%s of=%s bs=1 count=%d skip=%d && " \
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"%s %s -D -b binary %s %s" % (
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filename, tmp_name, size, offset,
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OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags,
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tmp_name)
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else:
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command = "%s %s --start-address=%d --stop-address=%d -d %s " % (
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OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS),
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offset,
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offset + size,
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filename)
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process = subprocess.Popen(command,
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shell=True,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT)
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out, err = process.communicate()
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lines = out.split("\n")
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header_line = 0
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for i, line in enumerate(lines):
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if _DISASM_HEADER_RE.match(line):
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header_line = i
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break
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if tmp_name:
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os.unlink(tmp_name)
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split_lines = []
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for line in lines[header_line + 1:]:
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match = _DISASM_LINE_RE.match(line)
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if match:
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line_address = int(match.group(1), 16)
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split_lines.append((line_address, match.group(2)))
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return split_lines
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