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 } 54 55 56 def GetDisasmLines(filename, offset, size, arch, inplace): 57 tmp_name = None 58 if not inplace: 59 # Create a temporary file containing a copy of the code. 60 assert arch in _ARCH_MAP, "Unsupported architecture '%s'" % arch 61 arch_flags = _ARCH_MAP[arch] 62 tmp_name = tempfile.mktemp(".v8code") 63 command = "dd if=%s of=%s bs=1 count=%d skip=%d && " \ 64 "%s %s -D -b binary %s %s" % ( 65 filename, tmp_name, size, offset, 66 OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags, 67 tmp_name) 68 else: 69 command = "%s %s --start-address=%d --stop-address=%d -d %s " % ( 70 OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), 71 offset, 72 offset + size, 73 filename) 74 process = subprocess.Popen(command, 75 shell=True, 76 stdout=subprocess.PIPE, 77 stderr=subprocess.STDOUT) 78 out, err = process.communicate() 79 lines = out.split("\n") 80 header_line = 0 81 for i, line in enumerate(lines): 82 if _DISASM_HEADER_RE.match(line): 83 header_line = i 84 break 85 if tmp_name: 86 os.unlink(tmp_name) 87 split_lines = [] 88 for line in lines[header_line + 1:]: 89 match = _DISASM_LINE_RE.match(line) 90 if match: 91 line_address = int(match.group(1), 16) 92 split_lines.append((line_address, match.group(2))) 93 return split_lines 94
