Daniel Dunbar | fb4a6b3 | 2009-08-21 09:11:24 +0000 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | |
| 3 | import struct |
| 4 | import sys |
| 5 | |
| 6 | class 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 | |
| 31 | def 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 | |
| 65 | def 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 | |
| 88 | def 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 | |
| 105 | def 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 | |
| 111 | def 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 | |
| 131 | def 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 | |
| 146 | def 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 | |
| 158 | if __name__ == '__main__': |
| 159 | main() |