| #!/usr/bin/env python |
| |
| import struct |
| import sys |
| import StringIO |
| |
| import common_dump |
| |
| class Reader: |
| def __init__(self, path): |
| if path == '-': |
| # Snarf all the data so we can seek. |
| self.file = StringIO.StringIO(sys.stdin.read()) |
| else: |
| self.file = open(path,'rb') |
| self.isLSB = None |
| self.is64Bit = None |
| |
| self.string_table = None |
| |
| def tell(self): |
| return self.file.tell() |
| |
| def seek(self, pos): |
| self.file.seek(pos) |
| |
| def read(self, N): |
| data = self.file.read(N) |
| if len(data) != N: |
| raise ValueError,"Out of data!" |
| return data |
| |
| def read8(self): |
| return ord(self.read(1)) |
| |
| def read16(self): |
| return struct.unpack('><'[self.isLSB] + 'H', self.read(2))[0] |
| |
| 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 read64(self): |
| Value = struct.unpack('><'[self.isLSB] + 'Q', self.read(8))[0] |
| if Value == int(Value): |
| Value = int(Value) |
| return Value |
| |
| def registerStringTable(self, strings): |
| if self.string_table is not None: |
| raise ValueError,"%s: warning: multiple string tables" % sys.argv[0] |
| |
| self.string_table = strings |
| |
| def getString(self, index): |
| if self.string_table is None: |
| raise ValueError,"%s: warning: no string table registered" % sys.argv[0] |
| |
| end = self.string_table.index('\x00', index) |
| return self.string_table[index:end] |
| |
| def dumpmacho(path, opts): |
| f = Reader(path) |
| |
| magic = f.read(4) |
| if magic == '\xFE\xED\xFA\xCE': |
| f.isLSB, f.is64Bit = False, False |
| elif magic == '\xCE\xFA\xED\xFE': |
| f.isLSB, f.is64Bit = True, False |
| elif magic == '\xFE\xED\xFA\xCF': |
| f.isLSB, f.is64Bit = False, True |
| elif magic == '\xCF\xFA\xED\xFE': |
| f.isLSB, f.is64Bit = True, 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)" % numLoadCommands |
| |
| loadCommandsSize = f.read32() |
| print "('load_commands_size', %r)" % loadCommandsSize |
| |
| print "('flag', %r)" % f.read32() |
| |
| if f.is64Bit: |
| print "('reserved', %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[0], 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: |
| dumpSegmentLoadCommand(f, opts, False) |
| elif cmd == 2: |
| dumpSymtabCommand(f, opts) |
| elif cmd == 11: |
| dumpDysymtabCommand(f, opts) |
| elif cmd == 25: |
| dumpSegmentLoadCommand(f, opts, True) |
| elif cmd == 27: |
| import uuid |
| print " ('uuid', %s)" % uuid.UUID(bytes=f.read(16)) |
| 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[0], cmdSize) |
| |
| def dumpSegmentLoadCommand(f, opts, is64Bit): |
| print " ('segment_name', %r)" % f.read(16) |
| if is64Bit: |
| print " ('vm_addr', %r)" % f.read64() |
| print " ('vm_size', %r)" % f.read64() |
| print " ('file_offset', %r)" % f.read64() |
| print " ('file_size', %r)" % f.read64() |
| else: |
| 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): |
| dumpSection(f, i, opts, is64Bit) |
| print " ])" |
| |
| def dumpSymtabCommand(f, opts): |
| symoff = f.read32() |
| print " ('symoff', %r)" % symoff |
| nsyms = f.read32() |
| print " ('nsyms', %r)" % nsyms |
| stroff = f.read32() |
| print " ('stroff', %r)" % stroff |
| strsize = f.read32() |
| print " ('strsize', %r)" % strsize |
| |
| prev_pos = f.tell() |
| |
| f.seek(stroff) |
| string_data = f.read(strsize) |
| print " ('_string_data', %r)" % string_data |
| |
| f.registerStringTable(string_data) |
| |
| f.seek(symoff) |
| print " ('_symbols', [" |
| for i in range(nsyms): |
| dumpNlist32(f, i, opts) |
| print " ])" |
| |
| f.seek(prev_pos) |
| |
| def dumpNlist32(f, i, opts): |
| print " # Symbol %r" % i |
| n_strx = f.read32() |
| print " (('n_strx', %r)" % n_strx |
| n_type = f.read8() |
| print " ('n_type', %#x)" % n_type |
| n_sect = f.read8() |
| print " ('n_sect', %r)" % n_sect |
| n_desc = f.read16() |
| print " ('n_desc', %r)" % n_desc |
| if f.is64Bit: |
| n_value = f.read64() |
| print " ('n_value', %r)" % n_value |
| else: |
| n_value = f.read32() |
| print " ('n_value', %r)" % n_value |
| print " ('_string', %r)" % f.getString(n_strx) |
| print " )," |
| |
| 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() |
| indirectsymoff = f.read32() |
| print " ('indirectsymoff', %r)" % indirectsymoff |
| nindirectsyms = f.read32() |
| print " ('nindirectsyms', %r)" % nindirectsyms |
| print " ('extreloff', %r)" % f.read32() |
| print " ('nextrel', %r)" % f.read32() |
| print " ('locreloff', %r)" % f.read32() |
| print " ('nlocrel', %r)" % f.read32() |
| |
| prev_pos = f.tell() |
| |
| f.seek(indirectsymoff) |
| print " ('_indirect_symbols', [" |
| for i in range(nindirectsyms): |
| print " # Indirect Symbol %r" % i |
| print " (('symbol_index', %#x),)," % f.read32() |
| print " ])" |
| |
| f.seek(prev_pos) |
| |
| def dumpSection(f, i, opts, is64Bit): |
| print " # Section %r" % i |
| print " (('section_name', %r)" % f.read(16) |
| print " ('segment_name', %r)" % f.read(16) |
| if is64Bit: |
| print " ('address', %r)" % f.read64() |
| size = f.read64() |
| print " ('size', %r)" % size |
| else: |
| print " ('address', %r)" % f.read32() |
| size = f.read32() |
| print " ('size', %r)" % size |
| offset = f.read32() |
| print " ('offset', %r)" % offset |
| print " ('alignment', %r)" % f.read32() |
| reloc_offset = f.read32() |
| print " ('reloc_offset', %r)" % reloc_offset |
| num_reloc = f.read32() |
| print " ('num_reloc', %r)" % num_reloc |
| print " ('flags', %#x)" % f.read32() |
| print " ('reserved1', %r)" % f.read32() |
| print " ('reserved2', %r)" % f.read32() |
| if is64Bit: |
| print " ('reserved3', %r)" % f.read32() |
| print " )," |
| |
| prev_pos = f.tell() |
| |
| f.seek(reloc_offset) |
| print " ('_relocations', [" |
| for i in range(num_reloc): |
| print " # Relocation %r" % i |
| print " (('word-0', %#x)," % f.read32() |
| print " ('word-1', %#x))," % f.read32() |
| print " ])" |
| |
| if opts.dumpSectionData: |
| f.seek(offset) |
| print " ('_section_data', '%s')" % common_dump.dataToHex(f.read(size)) |
| |
| f.seek(prev_pos) |
| |
| def main(): |
| from optparse import OptionParser, OptionGroup |
| parser = OptionParser("usage: %prog [options] {files}") |
| parser.add_option("", "--dump-section-data", dest="dumpSectionData", |
| help="Dump the contents of sections", |
| action="store_true", default=False) |
| (opts, args) = parser.parse_args() |
| |
| if not args: |
| args.append('-') |
| |
| for arg in args: |
| dumpmacho(arg, opts) |
| |
| if __name__ == '__main__': |
| main() |
