1#!/usr/bin/env python 2# 3# Copyright 2011 the V8 project authors. All rights reserved. 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: 7# 8# * Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# * Redistributions in binary form must reproduce the above 11# copyright notice, this list of conditions and the following 12# disclaimer in the documentation and/or other materials provided 13# with the distribution. 14# * Neither the name of Google Inc. nor the names of its 15# contributors may be used to endorse or promote products derived 16# from this software without specific prior written permission. 17# 18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30import os 31import re 32import subprocess 33import tempfile 34 35 36# Avoid using the slow (google-specific) wrapper around objdump. 37OBJDUMP_BIN = "/usr/bin/objdump" 38if not os.path.exists(OBJDUMP_BIN): 39 OBJDUMP_BIN = "objdump" 40 41# -M intel-mnemonic selects Intel syntax. 42# -C demangles. 43# -z disables skipping over sections of zeroes. 44_COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C", "-z"] 45 46_DISASM_HEADER_RE = re.compile(r"[a-f0-9]+\s+<.*:$") 47_DISASM_LINE_RE = re.compile(r"\s*([a-f0-9]+):\s*(\S.*)") 48 49# Keys must match constants in Logger::LogCodeInfo. 50_ARCH_MAP = { 51 "ia32": "-m i386", 52 "x64": "-m i386 -M x86-64", 53 "arm": "-m arm", # Not supported by our objdump build. 54 "mips": "-m mips", # Not supported by our objdump build. 55 "arm64": "-m aarch64" 56} 57 58 59def GetDisasmLines(filename, offset, size, arch, inplace, arch_flags=""): 60 tmp_name = None 61 if not inplace: 62 # Create a temporary file containing a copy of the code. 63 assert arch in _ARCH_MAP, "Unsupported architecture '%s'" % arch 64 arch_flags = arch_flags + " " + _ARCH_MAP[arch] 65 tmp_file = tempfile.NamedTemporaryFile(prefix=".v8code", delete=False) 66 tmp_name = tmp_file.name 67 tmp_file.close() 68 command = "dd if=%s of=%s bs=1 count=%d skip=%d && " \ 69 "%s %s -D -b binary %s %s" % ( 70 filename, tmp_name, size, offset, 71 OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags, 72 tmp_name) 73 else: 74 command = "%s %s %s --start-address=%d --stop-address=%d -d %s " % ( 75 OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags, 76 offset, 77 offset + size, 78 filename) 79 process = subprocess.Popen(command, 80 shell=True, 81 stdout=subprocess.PIPE, 82 stderr=subprocess.STDOUT) 83 out, err = process.communicate() 84 lines = out.split("\n") 85 header_line = 0 86 for i, line in enumerate(lines): 87 if _DISASM_HEADER_RE.match(line): 88 header_line = i 89 break 90 if tmp_name: 91 os.unlink(tmp_name) 92 split_lines = [] 93 for line in lines[header_line + 1:]: 94 match = _DISASM_LINE_RE.match(line) 95 if match: 96 line_address = int(match.group(1), 16) 97 split_lines.append((line_address, match.group(2))) 98 return split_lines 99