blob: e844197a6ccda1ae5a51d3681ba4351eab487f65 [file] [log] [blame]
Daniel Dunbarfb4a6b32009-08-21 09:11:24 +00001#!/usr/bin/env python
2
3import struct
4import sys
5
6class Reader:
7 def __init__(self, path):
8 if path == '-':
9 self.file = sys.stdin
10 else:
11 self.file = open(path,'rb')
12 self.isLSB = None
13 self.pos = 0
14
15 def setLSB(self, isLSB):
16 self.isLSB = bool(isLSB)
17
18 def tell(self):
19 return self.pos
20
21 def read(self, N):
22 data = self.file.read(N)
23 self.pos += len(data)
24 if len(data) != N:
25 raise ValueError,"Out of data!"
26 return data
27
28 def read32(self):
29 return struct.unpack('><'[self.isLSB] + 'I', self.read(4))[0]
30
31def dumpmacho(path, opts):
32 f = Reader(path)
33
34 magic = f.read(4)
35 if magic == '\xFE\xED\xFA\xCE':
36 f.setLSB(False)
37 elif magic == '\xCE\xFA\xED\xFE':
38 f.setLSB(True)
39 else:
40 raise ValueError,"Not a Mach-O object file: %r (bad magic)" % path
41
42 print "('cputype', %r)" % f.read32()
43 print "('cpusubtype', %r)" % f.read32()
44 filetype = f.read32()
45 print "('filetype', %r)" % filetype
46
47 numLoadCommands = f.read32()
48 print "('num_load_commands', %r)" % filetype
49
50 loadCommandsSize = f.read32()
51 print "('load_commands_size', %r)" % loadCommandsSize
52
53 print "('flag', %r)" % f.read32()
54
55 start = f.tell()
56
57 print "('load_commands', ["
58 for i in range(numLoadCommands):
59 dumpLoadCommand(f, i, opts)
60 print "])"
61
62 if f.tell() - start != loadCommandsSize:
63 raise ValueError,"%s: warning: invalid load commands size: %r" % (sys.argv, loadCommandsSize)
64
65def dumpLoadCommand(f, i, opts):
66 start = f.tell()
67
68 print " # Load Command %r" % i
69 cmd = f.read32()
70 print " (('command', %r)" % cmd
71 cmdSize = f.read32()
72 print " ('size', %r)" % cmdSize
73
74 if cmd == 1:
75 dumpSegmentLoadCommand32(f, opts)
76 elif cmd == 2:
77 dumpSymtabCommand(f, opts)
78 elif cmd == 11:
79 dumpDysymtabCommand(f, opts)
80 else:
81 print >>sys.stderr,"%s: warning: unknown load command: %r" % (sys.argv[0], cmd)
82 f.read(cmdSize - 8)
83 print " ),"
84
85 if f.tell() - start != cmdSize:
86 raise ValueError,"%s: warning: invalid load command size: %r" % (sys.argv, cmdSize)
87
88def dumpSegmentLoadCommand32(f, opts):
89 print " ('segment_name', %r)" % f.read(16)
90 print " ('vm_addr', %r)" % f.read32()
91 print " ('vm_size', %r)" % f.read32()
92 print " ('file_offset', %r)" % f.read32()
93 print " ('file_size', %r)" % f.read32()
94 print " ('maxprot', %r)" % f.read32()
95 print " ('initprot', %r)" % f.read32()
96 numSections = f.read32()
97 print " ('num_sections', %r)" % numSections
98 print " ('flags', %r)" % f.read32()
99
100 print " ('sections', ["
101 for i in range(numSections):
102 dumpSection32(f, i, opts)
103 print " ])"
104
105def dumpSymtabCommand(f, opts):
106 print " ('symoff', %r)" % f.read32()
107 print " ('nsyms', %r)" % f.read32()
108 print " ('stroff', %r)" % f.read32()
109 print " ('strsize', %r)" % f.read32()
110
111def dumpDysymtabCommand(f, opts):
112 print " ('ilocalsym', %r)" % f.read32()
113 print " ('nlocalsym', %r)" % f.read32()
114 print " ('iextdefsym', %r)" % f.read32()
115 print " ('nextdefsym', %r)" % f.read32()
116 print " ('iundefsym', %r)" % f.read32()
117 print " ('nundefsym', %r)" % f.read32()
118 print " ('tocoff', %r)" % f.read32()
119 print " ('ntoc', %r)" % f.read32()
120 print " ('modtaboff', %r)" % f.read32()
121 print " ('nmodtab', %r)" % f.read32()
122 print " ('extrefsymoff', %r)" % f.read32()
123 print " ('nextrefsyms', %r)" % f.read32()
124 print " ('indirectsymoff', %r)" % f.read32()
125 print " ('nindirectsyms', %r)" % f.read32()
126 print " ('extreloff', %r)" % f.read32()
127 print " ('nextrel', %r)" % f.read32()
128 print " ('locreloff', %r)" % f.read32()
129 print " ('nlocrel', %r)" % f.read32()
130
131def dumpSection32(f, i, opts):
132 print " # Section %r" % i
133 print " (('section_name', %r)" % f.read(16)
134 print " ('segment_name', %r)" % f.read(16)
135 print " ('address', %r)" % f.read32()
136 print " ('size', %r)" % f.read32()
137 print " ('offset', %r)" % f.read32()
138 print " ('alignment', %r)" % f.read32()
139 print " ('reloc_offset', %r)" % f.read32()
140 print " ('num_reloc', %r)" % f.read32()
141 print " ('flags', %#x)" % f.read32()
142 print " ('reserved1', %r)" % f.read32()
143 print " ('reserved2', %r)" % f.read32()
144 print " ),"
145
146def main():
147 from optparse import OptionParser, OptionGroup
148 parser = OptionParser("usage: %prog [options] {files}")
149
150 (opts, args) = parser.parse_args()
151
152 if not args:
153 args.append('-')
154
155 for arg in args:
156 dumpmacho(arg, opts)
157
158if __name__ == '__main__':
159 main()