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 30 import os 31 import re 32 import subprocess 33 import tempfile 34 35 36 # Avoid using the slow (google-specific) wrapper around objdump. 37 OBJDUMP_BIN = "/usr/bin/objdump" 38 if not os.path.exists(OBJDUMP_BIN): 39 OBJDUMP_BIN = "objdump" 40 41 42 _COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C"] 43 44 _DISASM_HEADER_RE = re.compile(r"[a-f0-9]+\s+<.*:$") 45 _DISASM_LINE_RE = re.compile(r"\s*([a-f0-9]+):\s*(\S.*)") 46 47 # Keys must match constants in Logger::LogCodeInfo. 48 _ARCH_MAP = { 49 "ia32": "-m i386", 50 "x64": "-m i386 -M x86-64", 51 "arm": "-m arm", # Not supported by our objdump build. 52 "mips": "-m mips", # Not supported by our objdump build. 53 "arm64": "-m aarch64" 54 } 55 56 57 def GetDisasmLines(filename, offset, size, arch, inplace, arch_flags=""): 58 tmp_name = None 59 if not inplace: 60 # Create a temporary file containing a copy of the code. 61 assert arch in _ARCH_MAP, "Unsupported architecture '%s'" % arch 62 arch_flags = arch_flags + " " + _ARCH_MAP[arch] 63 tmp_file = tempfile.NamedTemporaryFile(prefix=".v8code", delete=False) 64 tmp_name = tmp_file.name 65 tmp_file.close() 66 command = "dd if=%s of=%s bs=1 count=%d skip=%d && " \ 67 "%s %s -D -b binary %s %s" % ( 68 filename, tmp_name, size, offset, 69 OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags, 70 tmp_name) 71 else: 72 command = "%s %s %s --start-address=%d --stop-address=%d -d %s " % ( 73 OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags, 74 offset, 75 offset + size, 76 filename) 77 process = subprocess.Popen(command, 78 shell=True, 79 stdout=subprocess.PIPE, 80 stderr=subprocess.STDOUT) 81 out, err = process.communicate() 82 lines = out.split("\n") 83 header_line = 0 84 for i, line in enumerate(lines): 85 if _DISASM_HEADER_RE.match(line): 86 header_line = i 87 break 88 if tmp_name: 89 os.unlink(tmp_name) 90 split_lines = [] 91 for line in lines[header_line + 1:]: 92 match = _DISASM_LINE_RE.match(line) 93 if match: 94 line_address = int(match.group(1), 16) 95 split_lines.append((line_address, match.group(2))) 96 return split_lines 97
