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#!/usr/bin/env python
import struct
import sys
class Reader:
def __init__(self, path):
if path == '-':
self.file = sys.stdin
else:
self.file = open(path,'rb')
self.isLSB = None
self.pos = 0
def setLSB(self, isLSB):
self.isLSB = bool(isLSB)
def tell(self):
return self.pos
def read(self, N):
data = self.file.read(N)
self.pos += len(data)
if len(data) != N:
raise ValueError,"Out of data!"
return data
def read32(self):
# Force to 32-bit, if possible; otherwise these might be long ints on a
# big-endian platform. FIXME: Why???
Value = struct.unpack('><'[self.isLSB] + 'I', self.read(4))[0]
return int(Value)
def dumpmacho(path, opts):
f = Reader(path)
magic = f.read(4)
if magic == '\xFE\xED\xFA\xCE':
f.setLSB(False)
elif magic == '\xCE\xFA\xED\xFE':
f.setLSB(True)
else:
raise ValueError,"Not a Mach-O object file: %r (bad magic)" % path
print "('cputype', %r)" % f.read32()
print "('cpusubtype', %r)" % f.read32()
filetype = f.read32()
print "('filetype', %r)" % filetype
numLoadCommands = f.read32()
print "('num_load_commands', %r)" % filetype
loadCommandsSize = f.read32()
print "('load_commands_size', %r)" % loadCommandsSize
print "('flag', %r)" % f.read32()
start = f.tell()
print "('load_commands', ["
for i in range(numLoadCommands):
dumpLoadCommand(f, i, opts)
print "])"
if f.tell() - start != loadCommandsSize:
raise ValueError,"%s: warning: invalid load commands size: %r" % (sys.argv, loadCommandsSize)
def dumpLoadCommand(f, i, opts):
start = f.tell()
print " # Load Command %r" % i
cmd = f.read32()
print " (('command', %r)" % cmd
cmdSize = f.read32()
print " ('size', %r)" % cmdSize
if cmd == 1:
dumpSegmentLoadCommand32(f, opts)
elif cmd == 2:
dumpSymtabCommand(f, opts)
elif cmd == 11:
dumpDysymtabCommand(f, opts)
else:
print >>sys.stderr,"%s: warning: unknown load command: %r" % (sys.argv[0], cmd)
f.read(cmdSize - 8)
print " ),"
if f.tell() - start != cmdSize:
raise ValueError,"%s: warning: invalid load command size: %r" % (sys.argv, cmdSize)
def dumpSegmentLoadCommand32(f, opts):
print " ('segment_name', %r)" % f.read(16)
print " ('vm_addr', %r)" % f.read32()
print " ('vm_size', %r)" % f.read32()
print " ('file_offset', %r)" % f.read32()
print " ('file_size', %r)" % f.read32()
print " ('maxprot', %r)" % f.read32()
print " ('initprot', %r)" % f.read32()
numSections = f.read32()
print " ('num_sections', %r)" % numSections
print " ('flags', %r)" % f.read32()
print " ('sections', ["
for i in range(numSections):
dumpSection32(f, i, opts)
print " ])"
def dumpSymtabCommand(f, opts):
print " ('symoff', %r)" % f.read32()
print " ('nsyms', %r)" % f.read32()
print " ('stroff', %r)" % f.read32()
print " ('strsize', %r)" % f.read32()
def dumpDysymtabCommand(f, opts):
print " ('ilocalsym', %r)" % f.read32()
print " ('nlocalsym', %r)" % f.read32()
print " ('iextdefsym', %r)" % f.read32()
print " ('nextdefsym', %r)" % f.read32()
print " ('iundefsym', %r)" % f.read32()
print " ('nundefsym', %r)" % f.read32()
print " ('tocoff', %r)" % f.read32()
print " ('ntoc', %r)" % f.read32()
print " ('modtaboff', %r)" % f.read32()
print " ('nmodtab', %r)" % f.read32()
print " ('extrefsymoff', %r)" % f.read32()
print " ('nextrefsyms', %r)" % f.read32()
print " ('indirectsymoff', %r)" % f.read32()
print " ('nindirectsyms', %r)" % f.read32()
print " ('extreloff', %r)" % f.read32()
print " ('nextrel', %r)" % f.read32()
print " ('locreloff', %r)" % f.read32()
print " ('nlocrel', %r)" % f.read32()
def dumpSection32(f, i, opts):
print " # Section %r" % i
print " (('section_name', %r)" % f.read(16)
print " ('segment_name', %r)" % f.read(16)
print " ('address', %r)" % f.read32()
print " ('size', %r)" % f.read32()
print " ('offset', %r)" % f.read32()
print " ('alignment', %r)" % f.read32()
print " ('reloc_offset', %r)" % f.read32()
print " ('num_reloc', %r)" % f.read32()
print " ('flags', %#x)" % f.read32()
print " ('reserved1', %r)" % f.read32()
print " ('reserved2', %r)" % f.read32()
print " ),"
def main():
from optparse import OptionParser, OptionGroup
parser = OptionParser("usage: %prog [options] {files}")
(opts, args) = parser.parse_args()
if not args:
args.append('-')
for arg in args:
dumpmacho(arg, opts)
if __name__ == '__main__':
main()
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