diff options
Diffstat (limited to 'gnu/llvm/lldb/examples/python/mach_o.py')
| -rwxr-xr-x | gnu/llvm/lldb/examples/python/mach_o.py | 1846 |
1 files changed, 1846 insertions, 0 deletions
diff --git a/gnu/llvm/lldb/examples/python/mach_o.py b/gnu/llvm/lldb/examples/python/mach_o.py new file mode 100755 index 00000000000..eb97fe57cfc --- /dev/null +++ b/gnu/llvm/lldb/examples/python/mach_o.py @@ -0,0 +1,1846 @@ +#!/usr/bin/python +from __future__ import print_function + +import cmd +import dict_utils +import file_extract +import optparse +import re +import struct +import string +import io +import sys +import uuid + +# Mach header "magic" constants +MH_MAGIC = 0xfeedface +MH_CIGAM = 0xcefaedfe +MH_MAGIC_64 = 0xfeedfacf +MH_CIGAM_64 = 0xcffaedfe +FAT_MAGIC = 0xcafebabe +FAT_CIGAM = 0xbebafeca + +# Mach haeder "filetype" constants +MH_OBJECT = 0x00000001 +MH_EXECUTE = 0x00000002 +MH_FVMLIB = 0x00000003 +MH_CORE = 0x00000004 +MH_PRELOAD = 0x00000005 +MH_DYLIB = 0x00000006 +MH_DYLINKER = 0x00000007 +MH_BUNDLE = 0x00000008 +MH_DYLIB_STUB = 0x00000009 +MH_DSYM = 0x0000000a +MH_KEXT_BUNDLE = 0x0000000b + +# Mach haeder "flag" constant bits +MH_NOUNDEFS = 0x00000001 +MH_INCRLINK = 0x00000002 +MH_DYLDLINK = 0x00000004 +MH_BINDATLOAD = 0x00000008 +MH_PREBOUND = 0x00000010 +MH_SPLIT_SEGS = 0x00000020 +MH_LAZY_INIT = 0x00000040 +MH_TWOLEVEL = 0x00000080 +MH_FORCE_FLAT = 0x00000100 +MH_NOMULTIDEFS = 0x00000200 +MH_NOFIXPREBINDING = 0x00000400 +MH_PREBINDABLE = 0x00000800 +MH_ALLMODSBOUND = 0x00001000 +MH_SUBSECTIONS_VIA_SYMBOLS = 0x00002000 +MH_CANONICAL = 0x00004000 +MH_WEAK_DEFINES = 0x00008000 +MH_BINDS_TO_WEAK = 0x00010000 +MH_ALLOW_STACK_EXECUTION = 0x00020000 +MH_ROOT_SAFE = 0x00040000 +MH_SETUID_SAFE = 0x00080000 +MH_NO_REEXPORTED_DYLIBS = 0x00100000 +MH_PIE = 0x00200000 +MH_DEAD_STRIPPABLE_DYLIB = 0x00400000 +MH_HAS_TLV_DESCRIPTORS = 0x00800000 +MH_NO_HEAP_EXECUTION = 0x01000000 + +# Mach load command constants +LC_REQ_DYLD = 0x80000000 +LC_SEGMENT = 0x00000001 +LC_SYMTAB = 0x00000002 +LC_SYMSEG = 0x00000003 +LC_THREAD = 0x00000004 +LC_UNIXTHREAD = 0x00000005 +LC_LOADFVMLIB = 0x00000006 +LC_IDFVMLIB = 0x00000007 +LC_IDENT = 0x00000008 +LC_FVMFILE = 0x00000009 +LC_PREPAGE = 0x0000000a +LC_DYSYMTAB = 0x0000000b +LC_LOAD_DYLIB = 0x0000000c +LC_ID_DYLIB = 0x0000000d +LC_LOAD_DYLINKER = 0x0000000e +LC_ID_DYLINKER = 0x0000000f +LC_PREBOUND_DYLIB = 0x00000010 +LC_ROUTINES = 0x00000011 +LC_SUB_FRAMEWORK = 0x00000012 +LC_SUB_UMBRELLA = 0x00000013 +LC_SUB_CLIENT = 0x00000014 +LC_SUB_LIBRARY = 0x00000015 +LC_TWOLEVEL_HINTS = 0x00000016 +LC_PREBIND_CKSUM = 0x00000017 +LC_LOAD_WEAK_DYLIB = 0x00000018 | LC_REQ_DYLD +LC_SEGMENT_64 = 0x00000019 +LC_ROUTINES_64 = 0x0000001a +LC_UUID = 0x0000001b +LC_RPATH = 0x0000001c | LC_REQ_DYLD +LC_CODE_SIGNATURE = 0x0000001d +LC_SEGMENT_SPLIT_INFO = 0x0000001e +LC_REEXPORT_DYLIB = 0x0000001f | LC_REQ_DYLD +LC_LAZY_LOAD_DYLIB = 0x00000020 +LC_ENCRYPTION_INFO = 0x00000021 +LC_DYLD_INFO = 0x00000022 +LC_DYLD_INFO_ONLY = 0x00000022 | LC_REQ_DYLD +LC_LOAD_UPWARD_DYLIB = 0x00000023 | LC_REQ_DYLD +LC_VERSION_MIN_MACOSX = 0x00000024 +LC_VERSION_MIN_IPHONEOS = 0x00000025 +LC_FUNCTION_STARTS = 0x00000026 +LC_DYLD_ENVIRONMENT = 0x00000027 + +# Mach CPU constants +CPU_ARCH_MASK = 0xff000000 +CPU_ARCH_ABI64 = 0x01000000 +CPU_TYPE_ANY = 0xffffffff +CPU_TYPE_VAX = 1 +CPU_TYPE_MC680x0 = 6 +CPU_TYPE_I386 = 7 +CPU_TYPE_X86_64 = CPU_TYPE_I386 | CPU_ARCH_ABI64 +CPU_TYPE_MIPS = 8 +CPU_TYPE_MC98000 = 10 +CPU_TYPE_HPPA = 11 +CPU_TYPE_ARM = 12 +CPU_TYPE_MC88000 = 13 +CPU_TYPE_SPARC = 14 +CPU_TYPE_I860 = 15 +CPU_TYPE_ALPHA = 16 +CPU_TYPE_POWERPC = 18 +CPU_TYPE_POWERPC64 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64 + +# VM protection constants +VM_PROT_READ = 1 +VM_PROT_WRITE = 2 +VM_PROT_EXECUTE = 4 + +# VM protection constants +N_STAB = 0xe0 +N_PEXT = 0x10 +N_TYPE = 0x0e +N_EXT = 0x01 + +# Values for nlist N_TYPE bits of the "Mach.NList.type" field. +N_UNDF = 0x0 +N_ABS = 0x2 +N_SECT = 0xe +N_PBUD = 0xc +N_INDR = 0xa + +# Section indexes for the "Mach.NList.sect_idx" fields +NO_SECT = 0 +MAX_SECT = 255 + +# Stab defines +N_GSYM = 0x20 +N_FNAME = 0x22 +N_FUN = 0x24 +N_STSYM = 0x26 +N_LCSYM = 0x28 +N_BNSYM = 0x2e +N_OPT = 0x3c +N_RSYM = 0x40 +N_SLINE = 0x44 +N_ENSYM = 0x4e +N_SSYM = 0x60 +N_SO = 0x64 +N_OSO = 0x66 +N_LSYM = 0x80 +N_BINCL = 0x82 +N_SOL = 0x84 +N_PARAMS = 0x86 +N_VERSION = 0x88 +N_OLEVEL = 0x8A +N_PSYM = 0xa0 +N_EINCL = 0xa2 +N_ENTRY = 0xa4 +N_LBRAC = 0xc0 +N_EXCL = 0xc2 +N_RBRAC = 0xe0 +N_BCOMM = 0xe2 +N_ECOMM = 0xe4 +N_ECOML = 0xe8 +N_LENG = 0xfe + +vm_prot_names = ['---', 'r--', '-w-', 'rw-', '--x', 'r-x', '-wx', 'rwx'] + + +def dump_memory(base_addr, data, hex_bytes_len, num_per_line): + hex_bytes = data.encode('hex') + if hex_bytes_len == -1: + hex_bytes_len = len(hex_bytes) + addr = base_addr + ascii_str = '' + i = 0 + while i < hex_bytes_len: + if ((i / 2) % num_per_line) == 0: + if i > 0: + print(' %s' % (ascii_str)) + ascii_str = '' + print('0x%8.8x:' % (addr + i), end=' ') + hex_byte = hex_bytes[i:i + 2] + print(hex_byte, end=' ') + int_byte = int(hex_byte, 16) + ascii_char = '%c' % (int_byte) + if int_byte >= 32 and int_byte < 127: + ascii_str += ascii_char + else: + ascii_str += '.' + i = i + 2 + if ascii_str: + if (i / 2) % num_per_line: + padding = num_per_line - ((i / 2) % num_per_line) + else: + padding = 0 + print('%*s%s' % (padding * 3 + 1, '', ascii_str)) + print() + + +class TerminalColors: + '''Simple terminal colors class''' + + def __init__(self, enabled=True): + # TODO: discover terminal type from "file" and disable if + # it can't handle the color codes + self.enabled = enabled + + def reset(self): + '''Reset all terminal colors and formatting.''' + if self.enabled: + return "\x1b[0m" + return '' + + def bold(self, on=True): + '''Enable or disable bold depending on the "on" parameter.''' + if self.enabled: + if on: + return "\x1b[1m" + else: + return "\x1b[22m" + return '' + + def italics(self, on=True): + '''Enable or disable italics depending on the "on" parameter.''' + if self.enabled: + if on: + return "\x1b[3m" + else: + return "\x1b[23m" + return '' + + def underline(self, on=True): + '''Enable or disable underline depending on the "on" parameter.''' + if self.enabled: + if on: + return "\x1b[4m" + else: + return "\x1b[24m" + return '' + + def inverse(self, on=True): + '''Enable or disable inverse depending on the "on" parameter.''' + if self.enabled: + if on: + return "\x1b[7m" + else: + return "\x1b[27m" + return '' + + def strike(self, on=True): + '''Enable or disable strike through depending on the "on" parameter.''' + if self.enabled: + if on: + return "\x1b[9m" + else: + return "\x1b[29m" + return '' + + def black(self, fg=True): + '''Set the foreground or background color to black. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[30m" + else: + return "\x1b[40m" + return '' + + def red(self, fg=True): + '''Set the foreground or background color to red. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[31m" + else: + return "\x1b[41m" + return '' + + def green(self, fg=True): + '''Set the foreground or background color to green. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[32m" + else: + return "\x1b[42m" + return '' + + def yellow(self, fg=True): + '''Set the foreground or background color to yellow. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[43m" + else: + return "\x1b[33m" + return '' + + def blue(self, fg=True): + '''Set the foreground or background color to blue. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[34m" + else: + return "\x1b[44m" + return '' + + def magenta(self, fg=True): + '''Set the foreground or background color to magenta. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[35m" + else: + return "\x1b[45m" + return '' + + def cyan(self, fg=True): + '''Set the foreground or background color to cyan. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[36m" + else: + return "\x1b[46m" + return '' + + def white(self, fg=True): + '''Set the foreground or background color to white. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[37m" + else: + return "\x1b[47m" + return '' + + def default(self, fg=True): + '''Set the foreground or background color to the default. + The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.''' + if self.enabled: + if fg: + return "\x1b[39m" + else: + return "\x1b[49m" + return '' + + +def swap_unpack_char(): + """Returns the unpack prefix that will for non-native endian-ness.""" + if struct.pack('H', 1).startswith("\x00"): + return '<' + return '>' + + +def dump_hex_bytes(addr, s, bytes_per_line=16): + i = 0 + line = '' + for ch in s: + if (i % bytes_per_line) == 0: + if line: + print(line) + line = '%#8.8x: ' % (addr + i) + line += "%02X " % ord(ch) + i += 1 + print(line) + + +def dump_hex_byte_string_diff(addr, a, b, bytes_per_line=16): + i = 0 + line = '' + a_len = len(a) + b_len = len(b) + if a_len < b_len: + max_len = b_len + else: + max_len = a_len + tty_colors = TerminalColors(True) + for i in range(max_len): + ch = None + if i < a_len: + ch_a = a[i] + ch = ch_a + else: + ch_a = None + if i < b_len: + ch_b = b[i] + if not ch: + ch = ch_b + else: + ch_b = None + mismatch = ch_a != ch_b + if (i % bytes_per_line) == 0: + if line: + print(line) + line = '%#8.8x: ' % (addr + i) + if mismatch: + line += tty_colors.red() + line += "%02X " % ord(ch) + if mismatch: + line += tty_colors.default() + i += 1 + + print(line) + + +class Mach: + """Class that does everything mach-o related""" + + class Arch: + """Class that implements mach-o architectures""" + + def __init__(self, c=0, s=0): + self.cpu = c + self.sub = s + + def set_cpu_type(self, c): + self.cpu = c + + def set_cpu_subtype(self, s): + self.sub = s + + def set_arch(self, c, s): + self.cpu = c + self.sub = s + + def is_64_bit(self): + return (self.cpu & CPU_ARCH_ABI64) != 0 + + cpu_infos = [ + ["arm", CPU_TYPE_ARM, CPU_TYPE_ANY], + ["arm", CPU_TYPE_ARM, 0], + ["armv4", CPU_TYPE_ARM, 5], + ["armv6", CPU_TYPE_ARM, 6], + ["armv5", CPU_TYPE_ARM, 7], + ["xscale", CPU_TYPE_ARM, 8], + ["armv7", CPU_TYPE_ARM, 9], + ["armv7f", CPU_TYPE_ARM, 10], + ["armv7s", CPU_TYPE_ARM, 11], + ["armv7k", CPU_TYPE_ARM, 12], + ["armv7m", CPU_TYPE_ARM, 15], + ["armv7em", CPU_TYPE_ARM, 16], + ["ppc", CPU_TYPE_POWERPC, CPU_TYPE_ANY], + ["ppc", CPU_TYPE_POWERPC, 0], + ["ppc601", CPU_TYPE_POWERPC, 1], + ["ppc602", CPU_TYPE_POWERPC, 2], + ["ppc603", CPU_TYPE_POWERPC, 3], + ["ppc603e", CPU_TYPE_POWERPC, 4], + ["ppc603ev", CPU_TYPE_POWERPC, 5], + ["ppc604", CPU_TYPE_POWERPC, 6], + ["ppc604e", CPU_TYPE_POWERPC, 7], + ["ppc620", CPU_TYPE_POWERPC, 8], + ["ppc750", CPU_TYPE_POWERPC, 9], + ["ppc7400", CPU_TYPE_POWERPC, 10], + ["ppc7450", CPU_TYPE_POWERPC, 11], + ["ppc970", CPU_TYPE_POWERPC, 100], + ["ppc64", CPU_TYPE_POWERPC64, 0], + ["ppc970-64", CPU_TYPE_POWERPC64, 100], + ["i386", CPU_TYPE_I386, 3], + ["i486", CPU_TYPE_I386, 4], + ["i486sx", CPU_TYPE_I386, 0x84], + ["i386", CPU_TYPE_I386, CPU_TYPE_ANY], + ["x86_64", CPU_TYPE_X86_64, 3], + ["x86_64", CPU_TYPE_X86_64, CPU_TYPE_ANY], + ] + + def __str__(self): + for info in self.cpu_infos: + if self.cpu == info[1] and (self.sub & 0x00ffffff) == info[2]: + return info[0] + return "{0}.{1}".format(self.cpu, self.sub) + + class Magic(dict_utils.Enum): + + enum = { + 'MH_MAGIC': MH_MAGIC, + 'MH_CIGAM': MH_CIGAM, + 'MH_MAGIC_64': MH_MAGIC_64, + 'MH_CIGAM_64': MH_CIGAM_64, + 'FAT_MAGIC': FAT_MAGIC, + 'FAT_CIGAM': FAT_CIGAM + } + + def __init__(self, initial_value=0): + dict_utils.Enum.__init__(self, initial_value, self.enum) + + def is_skinny_mach_file(self): + return self.value == MH_MAGIC or self.value == MH_CIGAM or self.value == MH_MAGIC_64 or self.value == MH_CIGAM_64 + + def is_universal_mach_file(self): + return self.value == FAT_MAGIC or self.value == FAT_CIGAM + + def unpack(self, data): + data.set_byte_order('native') + self.value = data.get_uint32() + + def get_byte_order(self): + if self.value == MH_CIGAM or self.value == MH_CIGAM_64 or self.value == FAT_CIGAM: + return swap_unpack_char() + else: + return '=' + + def is_64_bit(self): + return self.value == MH_MAGIC_64 or self.value == MH_CIGAM_64 + + def __init__(self): + self.magic = Mach.Magic() + self.content = None + self.path = None + + def extract(self, path, extractor): + self.path = path + self.unpack(extractor) + + def parse(self, path): + self.path = path + try: + f = open(self.path) + file_extractor = file_extract.FileExtract(f, '=') + self.unpack(file_extractor) + # f.close() + except IOError as xxx_todo_changeme: + (errno, strerror) = xxx_todo_changeme.args + print("I/O error({0}): {1}".format(errno, strerror)) + except ValueError: + print("Could not convert data to an integer.") + except: + print("Unexpected error:", sys.exc_info()[0]) + raise + + def compare(self, rhs): + self.content.compare(rhs.content) + + def dump(self, options=None): + self.content.dump(options) + + def dump_header(self, dump_description=True, options=None): + self.content.dump_header(dump_description, options) + + def dump_load_commands(self, dump_description=True, options=None): + self.content.dump_load_commands(dump_description, options) + + def dump_sections(self, dump_description=True, options=None): + self.content.dump_sections(dump_description, options) + + def dump_section_contents(self, options): + self.content.dump_section_contents(options) + + def dump_symtab(self, dump_description=True, options=None): + self.content.dump_symtab(dump_description, options) + + def dump_symbol_names_matching_regex(self, regex, file=None): + self.content.dump_symbol_names_matching_regex(regex, file) + + def description(self): + return self.content.description() + + def unpack(self, data): + self.magic.unpack(data) + if self.magic.is_skinny_mach_file(): + self.content = Mach.Skinny(self.path) + elif self.magic.is_universal_mach_file(): + self.content = Mach.Universal(self.path) + else: + self.content = None + + if self.content is not None: + self.content.unpack(data, self.magic) + + def is_valid(self): + return self.content is not None + + class Universal: + + def __init__(self, path): + self.path = path + self.type = 'universal' + self.file_off = 0 + self.magic = None + self.nfat_arch = 0 + self.archs = list() + + def description(self): + s = '%#8.8x: %s (' % (self.file_off, self.path) + archs_string = '' + for arch in self.archs: + if len(archs_string): + archs_string += ', ' + archs_string += '%s' % arch.arch + s += archs_string + s += ')' + return s + + def unpack(self, data, magic=None): + self.file_off = data.tell() + if magic is None: + self.magic = Mach.Magic() + self.magic.unpack(data) + else: + self.magic = magic + self.file_off = self.file_off - 4 + # Universal headers are always in big endian + data.set_byte_order('big') + self.nfat_arch = data.get_uint32() + for i in range(self.nfat_arch): + self.archs.append(Mach.Universal.ArchInfo()) + self.archs[i].unpack(data) + for i in range(self.nfat_arch): + self.archs[i].mach = Mach.Skinny(self.path) + data.seek(self.archs[i].offset, 0) + skinny_magic = Mach.Magic() + skinny_magic.unpack(data) + self.archs[i].mach.unpack(data, skinny_magic) + + def compare(self, rhs): + print('error: comparing two universal files is not supported yet') + return False + + def dump(self, options): + if options.dump_header: + print() + print("Universal Mach File: magic = %s, nfat_arch = %u" % (self.magic, self.nfat_arch)) + print() + if self.nfat_arch > 0: + if options.dump_header: + self.archs[0].dump_header(True, options) + for i in range(self.nfat_arch): + self.archs[i].dump_flat(options) + if options.dump_header: + print() + for i in range(self.nfat_arch): + self.archs[i].mach.dump(options) + + def dump_header(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + for i in range(self.nfat_arch): + self.archs[i].mach.dump_header(True, options) + print() + + def dump_load_commands(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + for i in range(self.nfat_arch): + self.archs[i].mach.dump_load_commands(True, options) + print() + + def dump_sections(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + for i in range(self.nfat_arch): + self.archs[i].mach.dump_sections(True, options) + print() + + def dump_section_contents(self, options): + for i in range(self.nfat_arch): + self.archs[i].mach.dump_section_contents(options) + print() + + def dump_symtab(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + for i in range(self.nfat_arch): + self.archs[i].mach.dump_symtab(True, options) + print() + + def dump_symbol_names_matching_regex(self, regex, file=None): + for i in range(self.nfat_arch): + self.archs[i].mach.dump_symbol_names_matching_regex( + regex, file) + + class ArchInfo: + + def __init__(self): + self.arch = Mach.Arch(0, 0) + self.offset = 0 + self.size = 0 + self.align = 0 + self.mach = None + + def unpack(self, data): + # Universal headers are always in big endian + data.set_byte_order('big') + self.arch.cpu, self.arch.sub, self.offset, self.size, self.align = data.get_n_uint32( + 5) + + def dump_header(self, dump_description=True, options=None): + if options.verbose: + print("CPU SUBTYPE OFFSET SIZE ALIGN") + print("---------- ---------- ---------- ---------- ----------") + else: + print("ARCH FILEOFFSET FILESIZE ALIGN") + print("---------- ---------- ---------- ----------") + + def dump_flat(self, options): + if options.verbose: + print("%#8.8x %#8.8x %#8.8x %#8.8x %#8.8x" % (self.arch.cpu, self.arch.sub, self.offset, self.size, self.align)) + else: + print("%-10s %#8.8x %#8.8x %#8.8x" % (self.arch, self.offset, self.size, self.align)) + + def dump(self): + print(" cputype: %#8.8x" % self.arch.cpu) + print("cpusubtype: %#8.8x" % self.arch.sub) + print(" offset: %#8.8x" % self.offset) + print(" size: %#8.8x" % self.size) + print(" align: %#8.8x" % self.align) + + def __str__(self): + return "Mach.Universal.ArchInfo: %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x" % ( + self.arch.cpu, self.arch.sub, self.offset, self.size, self.align) + + def __repr__(self): + return "Mach.Universal.ArchInfo: %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x" % ( + self.arch.cpu, self.arch.sub, self.offset, self.size, self.align) + + class Flags: + + def __init__(self, b): + self.bits = b + + def __str__(self): + s = '' + if self.bits & MH_NOUNDEFS: + s += 'MH_NOUNDEFS | ' + if self.bits & MH_INCRLINK: + s += 'MH_INCRLINK | ' + if self.bits & MH_DYLDLINK: + s += 'MH_DYLDLINK | ' + if self.bits & MH_BINDATLOAD: + s += 'MH_BINDATLOAD | ' + if self.bits & MH_PREBOUND: + s += 'MH_PREBOUND | ' + if self.bits & MH_SPLIT_SEGS: + s += 'MH_SPLIT_SEGS | ' + if self.bits & MH_LAZY_INIT: + s += 'MH_LAZY_INIT | ' + if self.bits & MH_TWOLEVEL: + s += 'MH_TWOLEVEL | ' + if self.bits & MH_FORCE_FLAT: + s += 'MH_FORCE_FLAT | ' + if self.bits & MH_NOMULTIDEFS: + s += 'MH_NOMULTIDEFS | ' + if self.bits & MH_NOFIXPREBINDING: + s += 'MH_NOFIXPREBINDING | ' + if self.bits & MH_PREBINDABLE: + s += 'MH_PREBINDABLE | ' + if self.bits & MH_ALLMODSBOUND: + s += 'MH_ALLMODSBOUND | ' + if self.bits & MH_SUBSECTIONS_VIA_SYMBOLS: + s += 'MH_SUBSECTIONS_VIA_SYMBOLS | ' + if self.bits & MH_CANONICAL: + s += 'MH_CANONICAL | ' + if self.bits & MH_WEAK_DEFINES: + s += 'MH_WEAK_DEFINES | ' + if self.bits & MH_BINDS_TO_WEAK: + s += 'MH_BINDS_TO_WEAK | ' + if self.bits & MH_ALLOW_STACK_EXECUTION: + s += 'MH_ALLOW_STACK_EXECUTION | ' + if self.bits & MH_ROOT_SAFE: + s += 'MH_ROOT_SAFE | ' + if self.bits & MH_SETUID_SAFE: + s += 'MH_SETUID_SAFE | ' + if self.bits & MH_NO_REEXPORTED_DYLIBS: + s += 'MH_NO_REEXPORTED_DYLIBS | ' + if self.bits & MH_PIE: + s += 'MH_PIE | ' + if self.bits & MH_DEAD_STRIPPABLE_DYLIB: + s += 'MH_DEAD_STRIPPABLE_DYLIB | ' + if self.bits & MH_HAS_TLV_DESCRIPTORS: + s += 'MH_HAS_TLV_DESCRIPTORS | ' + if self.bits & MH_NO_HEAP_EXECUTION: + s += 'MH_NO_HEAP_EXECUTION | ' + # Strip the trailing " |" if we have any flags + if len(s) > 0: + s = s[0:-2] + return s + + class FileType(dict_utils.Enum): + + enum = { + 'MH_OBJECT': MH_OBJECT, + 'MH_EXECUTE': MH_EXECUTE, + 'MH_FVMLIB': MH_FVMLIB, + 'MH_CORE': MH_CORE, + 'MH_PRELOAD': MH_PRELOAD, + 'MH_DYLIB': MH_DYLIB, + 'MH_DYLINKER': MH_DYLINKER, + 'MH_BUNDLE': MH_BUNDLE, + 'MH_DYLIB_STUB': MH_DYLIB_STUB, + 'MH_DSYM': MH_DSYM, + 'MH_KEXT_BUNDLE': MH_KEXT_BUNDLE + } + + def __init__(self, initial_value=0): + dict_utils.Enum.__init__(self, initial_value, self.enum) + + class Skinny: + + def __init__(self, path): + self.path = path + self.type = 'skinny' + self.data = None + self.file_off = 0 + self.magic = 0 + self.arch = Mach.Arch(0, 0) + self.filetype = Mach.FileType(0) + self.ncmds = 0 + self.sizeofcmds = 0 + self.flags = Mach.Flags(0) + self.uuid = None + self.commands = list() + self.segments = list() + self.sections = list() + self.symbols = list() + self.sections.append(Mach.Section()) + + def description(self): + return '%#8.8x: %s (%s)' % (self.file_off, self.path, self.arch) + + def unpack(self, data, magic=None): + self.data = data + self.file_off = data.tell() + if magic is None: + self.magic = Mach.Magic() + self.magic.unpack(data) + else: + self.magic = magic + self.file_off = self.file_off - 4 + data.set_byte_order(self.magic.get_byte_order()) + self.arch.cpu, self.arch.sub, self.filetype.value, self.ncmds, self.sizeofcmds, bits = data.get_n_uint32( + 6) + self.flags.bits = bits + + if self.is_64_bit(): + data.get_uint32() # Skip reserved word in mach_header_64 + + for i in range(0, self.ncmds): + lc = self.unpack_load_command(data) + self.commands.append(lc) + + def get_data(self): + if self.data: + self.data.set_byte_order(self.magic.get_byte_order()) + return self.data + return None + + def unpack_load_command(self, data): + lc = Mach.LoadCommand() + lc.unpack(self, data) + lc_command = lc.command.get_enum_value() + if (lc_command == LC_SEGMENT or + lc_command == LC_SEGMENT_64): + lc = Mach.SegmentLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_LOAD_DYLIB or + lc_command == LC_ID_DYLIB or + lc_command == LC_LOAD_WEAK_DYLIB or + lc_command == LC_REEXPORT_DYLIB): + lc = Mach.DylibLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_LOAD_DYLINKER or + lc_command == LC_SUB_FRAMEWORK or + lc_command == LC_SUB_CLIENT or + lc_command == LC_SUB_UMBRELLA or + lc_command == LC_SUB_LIBRARY or + lc_command == LC_ID_DYLINKER or + lc_command == LC_RPATH): + lc = Mach.LoadDYLDLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_DYLD_INFO_ONLY): + lc = Mach.DYLDInfoOnlyLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_SYMTAB): + lc = Mach.SymtabLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_DYSYMTAB): + lc = Mach.DYLDSymtabLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_UUID): + lc = Mach.UUIDLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_CODE_SIGNATURE or + lc_command == LC_SEGMENT_SPLIT_INFO or + lc_command == LC_FUNCTION_STARTS): + lc = Mach.DataBlobLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_UNIXTHREAD): + lc = Mach.UnixThreadLoadCommand(lc) + lc.unpack(self, data) + elif (lc_command == LC_ENCRYPTION_INFO): + lc = Mach.EncryptionInfoLoadCommand(lc) + lc.unpack(self, data) + lc.skip(data) + return lc + + def compare(self, rhs): + print("\nComparing:") + print("a) %s %s" % (self.arch, self.path)) + print("b) %s %s" % (rhs.arch, rhs.path)) + result = True + if self.type == rhs.type: + for lhs_section in self.sections[1:]: + rhs_section = rhs.get_section_by_section(lhs_section) + if rhs_section: + print('comparing %s.%s...' % (lhs_section.segname, lhs_section.sectname), end=' ') + sys.stdout.flush() + lhs_data = lhs_section.get_contents(self) + rhs_data = rhs_section.get_contents(rhs) + if lhs_data and rhs_data: + if lhs_data == rhs_data: + print('ok') + else: + lhs_data_len = len(lhs_data) + rhs_data_len = len(rhs_data) + # if lhs_data_len < rhs_data_len: + # if lhs_data == rhs_data[0:lhs_data_len]: + # print 'section data for %s matches the first %u bytes' % (lhs_section.sectname, lhs_data_len) + # else: + # # TODO: check padding + # result = False + # elif lhs_data_len > rhs_data_len: + # if lhs_data[0:rhs_data_len] == rhs_data: + # print 'section data for %s matches the first %u bytes' % (lhs_section.sectname, lhs_data_len) + # else: + # # TODO: check padding + # result = False + # else: + result = False + print('error: sections differ') + # print 'a) %s' % (lhs_section) + # dump_hex_byte_string_diff(0, lhs_data, rhs_data) + # print 'b) %s' % (rhs_section) + # dump_hex_byte_string_diff(0, rhs_data, lhs_data) + elif lhs_data and not rhs_data: + print('error: section data missing from b:') + print('a) %s' % (lhs_section)) + print('b) %s' % (rhs_section)) + result = False + elif not lhs_data and rhs_data: + print('error: section data missing from a:') + print('a) %s' % (lhs_section)) + print('b) %s' % (rhs_section)) + result = False + elif lhs_section.offset or rhs_section.offset: + print('error: section data missing for both a and b:') + print('a) %s' % (lhs_section)) + print('b) %s' % (rhs_section)) + result = False + else: + print('ok') + else: + result = False + print('error: section %s is missing in %s' % (lhs_section.sectname, rhs.path)) + else: + print('error: comaparing a %s mach-o file with a %s mach-o file is not supported' % (self.type, rhs.type)) + result = False + if not result: + print('error: mach files differ') + return result + + def dump_header(self, dump_description=True, options=None): + if options.verbose: + print("MAGIC CPU SUBTYPE FILETYPE NUM CMDS SIZE CMDS FLAGS") + print("---------- ---------- ---------- ---------- -------- ---------- ----------") + else: + print("MAGIC ARCH FILETYPE NUM CMDS SIZE CMDS FLAGS") + print("------------ ---------- -------------- -------- ---------- ----------") + + def dump_flat(self, options): + if options.verbose: + print("%#8.8x %#8.8x %#8.8x %#8.8x %#8u %#8.8x %#8.8x" % (self.magic, self.arch.cpu, self.arch.sub, self.filetype.value, self.ncmds, self.sizeofcmds, self.flags.bits)) + else: + print("%-12s %-10s %-14s %#8u %#8.8x %s" % (self.magic, self.arch, self.filetype, self.ncmds, self.sizeofcmds, self.flags)) + + def dump(self, options): + if options.dump_header: + self.dump_header(True, options) + if options.dump_load_commands: + self.dump_load_commands(False, options) + if options.dump_sections: + self.dump_sections(False, options) + if options.section_names: + self.dump_section_contents(options) + if options.dump_symtab: + self.get_symtab() + if len(self.symbols): + self.dump_sections(False, options) + else: + print("No symbols") + if options.find_mangled: + self.dump_symbol_names_matching_regex(re.compile('^_?_Z')) + + def dump_header(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + print("Mach Header") + print(" magic: %#8.8x %s" % (self.magic.value, self.magic)) + print(" cputype: %#8.8x %s" % (self.arch.cpu, self.arch)) + print(" cpusubtype: %#8.8x" % self.arch.sub) + print(" filetype: %#8.8x %s" % (self.filetype.get_enum_value(), self.filetype.get_enum_name())) + print(" ncmds: %#8.8x %u" % (self.ncmds, self.ncmds)) + print(" sizeofcmds: %#8.8x" % self.sizeofcmds) + print(" flags: %#8.8x %s" % (self.flags.bits, self.flags)) + + def dump_load_commands(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + for lc in self.commands: + print(lc) + + def get_section_by_name(self, name): + for section in self.sections: + if section.sectname and section.sectname == name: + return section + return None + + def get_section_by_section(self, other_section): + for section in self.sections: + if section.sectname == other_section.sectname and section.segname == other_section.segname: + return section + return None + + def dump_sections(self, dump_description=True, options=None): + if dump_description: + print(self.description()) + num_sections = len(self.sections) + if num_sections > 1: + self.sections[1].dump_header() + for sect_idx in range(1, num_sections): + print("%s" % self.sections[sect_idx]) + + def dump_section_contents(self, options): + saved_section_to_disk = False + for sectname in options.section_names: + section = self.get_section_by_name(sectname) + if section: + sect_bytes = section.get_contents(self) + if options.outfile: + if not saved_section_to_disk: + outfile = open(options.outfile, 'w') + if options.extract_modules: + # print "Extracting modules from mach file..." + data = file_extract.FileExtract( + io.BytesIO(sect_bytes), self.data.byte_order) + version = data.get_uint32() + num_modules = data.get_uint32() + # print "version = %u, num_modules = %u" % + # (version, num_modules) + for i in range(num_modules): + data_offset = data.get_uint64() + data_size = data.get_uint64() + name_offset = data.get_uint32() + language = data.get_uint32() + flags = data.get_uint32() + data.seek(name_offset) + module_name = data.get_c_string() + # print "module[%u] data_offset = %#16.16x, + # data_size = %#16.16x, name_offset = + # %#16.16x (%s), language = %u, flags = + # %#x" % (i, data_offset, data_size, + # name_offset, module_name, language, + # flags) + data.seek(data_offset) + outfile.write(data.read_size(data_size)) + else: + print("Saving section %s to '%s'" % (sectname, options.outfile)) + outfile.write(sect_bytes) + outfile.close() + saved_section_to_disk = True + else: + print("error: you can only save a single section to disk at a time, skipping section '%s'" % (sectname)) + else: + print('section %s:\n' % (sectname)) + section.dump_header() + print('%s\n' % (section)) + dump_memory(0, sect_bytes, options.max_count, 16) + else: + print('error: no section named "%s" was found' % (sectname)) + + def get_segment(self, segname): + if len(self.segments) == 1 and self.segments[0].segname == '': + return self.segments[0] + for segment in self.segments: + if segment.segname == segname: + return segment + return None + + def get_first_load_command(self, lc_enum_value): + for lc in self.commands: + if lc.command.value == lc_enum_value: + return lc + return None + + def get_symtab(self): + if self.data and not self.symbols: + lc_symtab = self.get_first_load_command(LC_SYMTAB) + if lc_symtab: + symtab_offset = self.file_off + if self.data.is_in_memory(): + linkedit_segment = self.get_segment('__LINKEDIT') + if linkedit_segment: + linkedit_vmaddr = linkedit_segment.vmaddr + linkedit_fileoff = linkedit_segment.fileoff + symtab_offset = linkedit_vmaddr + lc_symtab.symoff - linkedit_fileoff + symtab_offset = linkedit_vmaddr + lc_symtab.stroff - linkedit_fileoff + else: + symtab_offset += lc_symtab.symoff + + self.data.seek(symtab_offset) + is_64 = self.is_64_bit() + for i in range(lc_symtab.nsyms): + nlist = Mach.NList() + nlist.unpack(self, self.data, lc_symtab) + self.symbols.append(nlist) + else: + print("no LC_SYMTAB") + + def dump_symtab(self, dump_description=True, options=None): + self.get_symtab() + if dump_description: + print(self.description()) + for i, symbol in enumerate(self.symbols): + print('[%5u] %s' % (i, symbol)) + + def dump_symbol_names_matching_regex(self, regex, file=None): + self.get_symtab() + for symbol in self.symbols: + if symbol.name and regex.search(symbol.name): + print(symbol.name) + if file: + file.write('%s\n' % (symbol.name)) + + def is_64_bit(self): + return self.magic.is_64_bit() + + class LoadCommand: + + class Command(dict_utils.Enum): + enum = { + 'LC_SEGMENT': LC_SEGMENT, + 'LC_SYMTAB': LC_SYMTAB, + 'LC_SYMSEG': LC_SYMSEG, + 'LC_THREAD': LC_THREAD, + 'LC_UNIXTHREAD': LC_UNIXTHREAD, + 'LC_LOADFVMLIB': LC_LOADFVMLIB, + 'LC_IDFVMLIB': LC_IDFVMLIB, + 'LC_IDENT': LC_IDENT, + 'LC_FVMFILE': LC_FVMFILE, + 'LC_PREPAGE': LC_PREPAGE, + 'LC_DYSYMTAB': LC_DYSYMTAB, + 'LC_LOAD_DYLIB': LC_LOAD_DYLIB, + 'LC_ID_DYLIB': LC_ID_DYLIB, + 'LC_LOAD_DYLINKER': LC_LOAD_DYLINKER, + 'LC_ID_DYLINKER': LC_ID_DYLINKER, + 'LC_PREBOUND_DYLIB': LC_PREBOUND_DYLIB, + 'LC_ROUTINES': LC_ROUTINES, + 'LC_SUB_FRAMEWORK': LC_SUB_FRAMEWORK, + 'LC_SUB_UMBRELLA': LC_SUB_UMBRELLA, + 'LC_SUB_CLIENT': LC_SUB_CLIENT, + 'LC_SUB_LIBRARY': LC_SUB_LIBRARY, + 'LC_TWOLEVEL_HINTS': LC_TWOLEVEL_HINTS, + 'LC_PREBIND_CKSUM': LC_PREBIND_CKSUM, + 'LC_LOAD_WEAK_DYLIB': LC_LOAD_WEAK_DYLIB, + 'LC_SEGMENT_64': LC_SEGMENT_64, + 'LC_ROUTINES_64': LC_ROUTINES_64, + 'LC_UUID': LC_UUID, + 'LC_RPATH': LC_RPATH, + 'LC_CODE_SIGNATURE': LC_CODE_SIGNATURE, + 'LC_SEGMENT_SPLIT_INFO': LC_SEGMENT_SPLIT_INFO, + 'LC_REEXPORT_DYLIB': LC_REEXPORT_DYLIB, + 'LC_LAZY_LOAD_DYLIB': LC_LAZY_LOAD_DYLIB, + 'LC_ENCRYPTION_INFO': LC_ENCRYPTION_INFO, + 'LC_DYLD_INFO': LC_DYLD_INFO, + 'LC_DYLD_INFO_ONLY': LC_DYLD_INFO_ONLY, + 'LC_LOAD_UPWARD_DYLIB': LC_LOAD_UPWARD_DYLIB, + 'LC_VERSION_MIN_MACOSX': LC_VERSION_MIN_MACOSX, + 'LC_VERSION_MIN_IPHONEOS': LC_VERSION_MIN_IPHONEOS, + 'LC_FUNCTION_STARTS': LC_FUNCTION_STARTS, + 'LC_DYLD_ENVIRONMENT': LC_DYLD_ENVIRONMENT + } + + def __init__(self, initial_value=0): + dict_utils.Enum.__init__(self, initial_value, self.enum) + + def __init__(self, c=None, l=0, o=0): + if c is not None: + self.command = c + else: + self.command = Mach.LoadCommand.Command(0) + self.length = l + self.file_off = o + + def unpack(self, mach_file, data): + self.file_off = data.tell() + self.command.value, self.length = data.get_n_uint32(2) + + def skip(self, data): + data.seek(self.file_off + self.length, 0) + + def __str__(self): + lc_name = self.command.get_enum_name() + return '%#8.8x: <%#4.4x> %-24s' % (self.file_off, + self.length, lc_name) + + class Section: + + def __init__(self): + self.index = 0 + self.is_64 = False + self.sectname = None + self.segname = None + self.addr = 0 + self.size = 0 + self.offset = 0 + self.align = 0 + self.reloff = 0 + self.nreloc = 0 + self.flags = 0 + self.reserved1 = 0 + self.reserved2 = 0 + self.reserved3 = 0 + + def unpack(self, is_64, data): + self.is_64 = is_64 + self.sectname = data.get_fixed_length_c_string(16, '', True) + self.segname = data.get_fixed_length_c_string(16, '', True) + if self.is_64: + self.addr, self.size = data.get_n_uint64(2) + self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2, self.reserved3 = data.get_n_uint32( + 8) + else: + self.addr, self.size = data.get_n_uint32(2) + self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2 = data.get_n_uint32( + 7) + + def dump_header(self): + if self.is_64: + print("INDEX ADDRESS SIZE OFFSET ALIGN RELOFF NRELOC FLAGS RESERVED1 RESERVED2 RESERVED3 NAME") + print("===== ------------------ ------------------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------------") + else: + print("INDEX ADDRESS SIZE OFFSET ALIGN RELOFF NRELOC FLAGS RESERVED1 RESERVED2 NAME") + print("===== ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------------") + + def __str__(self): + if self.is_64: + return "[%3u] %#16.16x %#16.16x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %s.%s" % ( + self.index, self.addr, self.size, self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2, self.reserved3, self.segname, self.sectname) + else: + return "[%3u] %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %s.%s" % ( + self.index, self.addr, self.size, self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2, self.segname, self.sectname) + + def get_contents(self, mach_file): + '''Get the section contents as a python string''' + if self.size > 0 and mach_file.get_segment( + self.segname).filesize > 0: + data = mach_file.get_data() + if data: + section_data_offset = mach_file.file_off + self.offset + # print '%s.%s is at offset 0x%x with size 0x%x' % + # (self.segname, self.sectname, section_data_offset, + # self.size) + data.push_offset_and_seek(section_data_offset) + bytes = data.read_size(self.size) + data.pop_offset_and_seek() + return bytes + return None + + class DylibLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.name = None + self.timestamp = 0 + self.current_version = 0 + self.compatibility_version = 0 + + def unpack(self, mach_file, data): + byte_order_char = mach_file.magic.get_byte_order() + name_offset, self.timestamp, self.current_version, self.compatibility_version = data.get_n_uint32( + 4) + data.seek(self.file_off + name_offset, 0) + self.name = data.get_fixed_length_c_string(self.length - 24) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += "%#8.8x %#8.8x %#8.8x " % (self.timestamp, + self.current_version, + self.compatibility_version) + s += self.name + return s + + class LoadDYLDLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.name = None + + def unpack(self, mach_file, data): + data.get_uint32() + self.name = data.get_fixed_length_c_string(self.length - 12) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += "%s" % self.name + return s + + class UnixThreadLoadCommand(LoadCommand): + + class ThreadState: + + def __init__(self): + self.flavor = 0 + self.count = 0 + self.register_values = list() + + def unpack(self, data): + self.flavor, self.count = data.get_n_uint32(2) + self.register_values = data.get_n_uint32(self.count) + + def __str__(self): + s = "flavor = %u, count = %u, regs =" % ( + self.flavor, self.count) + i = 0 + for register_value in self.register_values: + if i % 8 == 0: + s += "\n " + s += " %#8.8x" % register_value + i += 1 + return s + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.reg_sets = list() + + def unpack(self, mach_file, data): + reg_set = Mach.UnixThreadLoadCommand.ThreadState() + reg_set.unpack(data) + self.reg_sets.append(reg_set) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + for reg_set in self.reg_sets: + s += "%s" % reg_set + return s + + class DYLDInfoOnlyLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.rebase_off = 0 + self.rebase_size = 0 + self.bind_off = 0 + self.bind_size = 0 + self.weak_bind_off = 0 + self.weak_bind_size = 0 + self.lazy_bind_off = 0 + self.lazy_bind_size = 0 + self.export_off = 0 + self.export_size = 0 + + def unpack(self, mach_file, data): + byte_order_char = mach_file.magic.get_byte_order() + self.rebase_off, self.rebase_size, self.bind_off, self.bind_size, self.weak_bind_off, self.weak_bind_size, self.lazy_bind_off, self.lazy_bind_size, self.export_off, self.export_size = data.get_n_uint32( + 10) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += "rebase_off = %#8.8x, rebase_size = %u, " % ( + self.rebase_off, self.rebase_size) + s += "bind_off = %#8.8x, bind_size = %u, " % ( + self.bind_off, self.bind_size) + s += "weak_bind_off = %#8.8x, weak_bind_size = %u, " % ( + self.weak_bind_off, self.weak_bind_size) + s += "lazy_bind_off = %#8.8x, lazy_bind_size = %u, " % ( + self.lazy_bind_off, self.lazy_bind_size) + s += "export_off = %#8.8x, export_size = %u, " % ( + self.export_off, self.export_size) + return s + + class DYLDSymtabLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.ilocalsym = 0 + self.nlocalsym = 0 + self.iextdefsym = 0 + self.nextdefsym = 0 + self.iundefsym = 0 + self.nundefsym = 0 + self.tocoff = 0 + self.ntoc = 0 + self.modtaboff = 0 + self.nmodtab = 0 + self.extrefsymoff = 0 + self.nextrefsyms = 0 + self.indirectsymoff = 0 + self.nindirectsyms = 0 + self.extreloff = 0 + self.nextrel = 0 + self.locreloff = 0 + self.nlocrel = 0 + + def unpack(self, mach_file, data): + byte_order_char = mach_file.magic.get_byte_order() + self.ilocalsym, self.nlocalsym, self.iextdefsym, self.nextdefsym, self.iundefsym, self.nundefsym, self.tocoff, self.ntoc, self.modtaboff, self.nmodtab, self.extrefsymoff, self.nextrefsyms, self.indirectsymoff, self.nindirectsyms, self.extreloff, self.nextrel, self.locreloff, self.nlocrel = data.get_n_uint32( + 18) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + # s += "ilocalsym = %u, nlocalsym = %u, " % (self.ilocalsym, self.nlocalsym) + # s += "iextdefsym = %u, nextdefsym = %u, " % (self.iextdefsym, self.nextdefsym) + # s += "iundefsym %u, nundefsym = %u, " % (self.iundefsym, self.nundefsym) + # s += "tocoff = %#8.8x, ntoc = %u, " % (self.tocoff, self.ntoc) + # s += "modtaboff = %#8.8x, nmodtab = %u, " % (self.modtaboff, self.nmodtab) + # s += "extrefsymoff = %#8.8x, nextrefsyms = %u, " % (self.extrefsymoff, self.nextrefsyms) + # s += "indirectsymoff = %#8.8x, nindirectsyms = %u, " % (self.indirectsymoff, self.nindirectsyms) + # s += "extreloff = %#8.8x, nextrel = %u, " % (self.extreloff, self.nextrel) + # s += "locreloff = %#8.8x, nlocrel = %u" % (self.locreloff, + # self.nlocrel) + s += "ilocalsym = %-10u, nlocalsym = %u\n" % ( + self.ilocalsym, self.nlocalsym) + s += " iextdefsym = %-10u, nextdefsym = %u\n" % ( + self.iextdefsym, self.nextdefsym) + s += " iundefsym = %-10u, nundefsym = %u\n" % ( + self.iundefsym, self.nundefsym) + s += " tocoff = %#8.8x, ntoc = %u\n" % ( + self.tocoff, self.ntoc) + s += " modtaboff = %#8.8x, nmodtab = %u\n" % ( + self.modtaboff, self.nmodtab) + s += " extrefsymoff = %#8.8x, nextrefsyms = %u\n" % ( + self.extrefsymoff, self.nextrefsyms) + s += " indirectsymoff = %#8.8x, nindirectsyms = %u\n" % ( + self.indirectsymoff, self.nindirectsyms) + s += " extreloff = %#8.8x, nextrel = %u\n" % ( + self.extreloff, self.nextrel) + s += " locreloff = %#8.8x, nlocrel = %u" % ( + self.locreloff, self.nlocrel) + return s + + class SymtabLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.symoff = 0 + self.nsyms = 0 + self.stroff = 0 + self.strsize = 0 + + def unpack(self, mach_file, data): + byte_order_char = mach_file.magic.get_byte_order() + self.symoff, self.nsyms, self.stroff, self.strsize = data.get_n_uint32( + 4) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += "symoff = %#8.8x, nsyms = %u, stroff = %#8.8x, strsize = %u" % ( + self.symoff, self.nsyms, self.stroff, self.strsize) + return s + + class UUIDLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.uuid = None + + def unpack(self, mach_file, data): + uuid_data = data.get_n_uint8(16) + uuid_str = '' + for byte in uuid_data: + uuid_str += '%2.2x' % byte + self.uuid = uuid.UUID(uuid_str) + mach_file.uuid = self.uuid + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += self.uuid.__str__() + return s + + class DataBlobLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.dataoff = 0 + self.datasize = 0 + + def unpack(self, mach_file, data): + byte_order_char = mach_file.magic.get_byte_order() + self.dataoff, self.datasize = data.get_n_uint32(2) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += "dataoff = %#8.8x, datasize = %u" % ( + self.dataoff, self.datasize) + return s + + class EncryptionInfoLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.cryptoff = 0 + self.cryptsize = 0 + self.cryptid = 0 + + def unpack(self, mach_file, data): + byte_order_char = mach_file.magic.get_byte_order() + self.cryptoff, self.cryptsize, self.cryptid = data.get_n_uint32(3) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + s += "file-range = [%#8.8x - %#8.8x), cryptsize = %u, cryptid = %u" % ( + self.cryptoff, self.cryptoff + self.cryptsize, self.cryptsize, self.cryptid) + return s + + class SegmentLoadCommand(LoadCommand): + + def __init__(self, lc): + Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off) + self.segname = None + self.vmaddr = 0 + self.vmsize = 0 + self.fileoff = 0 + self.filesize = 0 + self.maxprot = 0 + self.initprot = 0 + self.nsects = 0 + self.flags = 0 + + def unpack(self, mach_file, data): + is_64 = self.command.get_enum_value() == LC_SEGMENT_64 + self.segname = data.get_fixed_length_c_string(16, '', True) + if is_64: + self.vmaddr, self.vmsize, self.fileoff, self.filesize = data.get_n_uint64( + 4) + else: + self.vmaddr, self.vmsize, self.fileoff, self.filesize = data.get_n_uint32( + 4) + self.maxprot, self.initprot, self.nsects, self.flags = data.get_n_uint32( + 4) + mach_file.segments.append(self) + for i in range(self.nsects): + section = Mach.Section() + section.unpack(is_64, data) + section.index = len(mach_file.sections) + mach_file.sections.append(section) + + def __str__(self): + s = Mach.LoadCommand.__str__(self) + if self.command.get_enum_value() == LC_SEGMENT: + s += "%#8.8x %#8.8x %#8.8x %#8.8x " % ( + self.vmaddr, self.vmsize, self.fileoff, self.filesize) + else: + s += "%#16.16x %#16.16x %#16.16x %#16.16x " % ( + self.vmaddr, self.vmsize, self.fileoff, self.filesize) + s += "%s %s %3u %#8.8x" % (vm_prot_names[self.maxprot], vm_prot_names[ + self.initprot], self.nsects, self.flags) + s += ' ' + self.segname + return s + + class NList: + + class Type: + + class Stab(dict_utils.Enum): + enum = { + 'N_GSYM': N_GSYM, + 'N_FNAME': N_FNAME, + 'N_FUN': N_FUN, + 'N_STSYM': N_STSYM, + 'N_LCSYM': N_LCSYM, + 'N_BNSYM': N_BNSYM, + 'N_OPT': N_OPT, + 'N_RSYM': N_RSYM, + 'N_SLINE': N_SLINE, + 'N_ENSYM': N_ENSYM, + 'N_SSYM': N_SSYM, + 'N_SO': N_SO, + 'N_OSO': N_OSO, + 'N_LSYM': N_LSYM, + 'N_BINCL': N_BINCL, + 'N_SOL': N_SOL, + 'N_PARAMS': N_PARAMS, + 'N_VERSION': N_VERSION, + 'N_OLEVEL': N_OLEVEL, + 'N_PSYM': N_PSYM, + 'N_EINCL': N_EINCL, + 'N_ENTRY': N_ENTRY, + 'N_LBRAC': N_LBRAC, + 'N_EXCL': N_EXCL, + 'N_RBRAC': N_RBRAC, + 'N_BCOMM': N_BCOMM, + 'N_ECOMM': N_ECOMM, + 'N_ECOML': N_ECOML, + 'N_LENG': N_LENG + } + + def __init__(self, magic=0): + dict_utils.Enum.__init__(self, magic, self.enum) + + def __init__(self, t=0): + self.value = t + + def __str__(self): + n_type = self.value + if n_type & N_STAB: + stab = Mach.NList.Type.Stab(self.value) + return '%s' % stab + else: + type = self.value & N_TYPE + type_str = '' + if type == N_UNDF: + type_str = 'N_UNDF' + elif type == N_ABS: + type_str = 'N_ABS ' + elif type == N_SECT: + type_str = 'N_SECT' + elif type == N_PBUD: + type_str = 'N_PBUD' + elif type == N_INDR: + type_str = 'N_INDR' + else: + type_str = "??? (%#2.2x)" % type + if n_type & N_PEXT: + type_str += ' | PEXT' + if n_type & N_EXT: + type_str += ' | EXT ' + return type_str + + def __init__(self): + self.index = 0 + self.name_offset = 0 + self.name = 0 + self.type = Mach.NList.Type() + self.sect_idx = 0 + self.desc = 0 + self.value = 0 + + def unpack(self, mach_file, data, symtab_lc): + self.index = len(mach_file.symbols) + self.name_offset = data.get_uint32() + self.type.value, self.sect_idx = data.get_n_uint8(2) + self.desc = data.get_uint16() + if mach_file.is_64_bit(): + self.value = data.get_uint64() + else: + self.value = data.get_uint32() + data.push_offset_and_seek( + mach_file.file_off + + symtab_lc.stroff + + self.name_offset) + # print "get string for symbol[%u]" % self.index + self.name = data.get_c_string() + data.pop_offset_and_seek() + + def __str__(self): + name_display = '' + if len(self.name): + name_display = ' "%s"' % self.name + return '%#8.8x %#2.2x (%-20s) %#2.2x %#4.4x %16.16x%s' % (self.name_offset, + self.type.value, self.type, self.sect_idx, self.desc, self.value, name_display) + + class Interactive(cmd.Cmd): + '''Interactive command interpreter to mach-o files.''' + + def __init__(self, mach, options): + cmd.Cmd.__init__(self) + self.intro = 'Interactive mach-o command interpreter' + self.prompt = 'mach-o: %s %% ' % mach.path + self.mach = mach + self.options = options + + def default(self, line): + '''Catch all for unknown command, which will exit the interpreter.''' + print("uknown command: %s" % line) + return True + + def do_q(self, line): + '''Quit command''' + return True + + def do_quit(self, line): + '''Quit command''' + return True + + def do_header(self, line): + '''Dump mach-o file headers''' + self.mach.dump_header(True, self.options) + return False + + def do_load(self, line): + '''Dump all mach-o load commands''' + self.mach.dump_load_commands(True, self.options) + return False + + def do_sections(self, line): + '''Dump all mach-o sections''' + self.mach.dump_sections(True, self.options) + return False + + def do_symtab(self, line): + '''Dump all mach-o symbols in the symbol table''' + self.mach.dump_symtab(True, self.options) + return False + +if __name__ == '__main__': + parser = optparse.OptionParser( + description='A script that parses skinny and universal mach-o files.') + parser.add_option( + '--arch', + '-a', + type='string', + metavar='arch', + dest='archs', + action='append', + help='specify one or more architectures by name') + parser.add_option( + '-v', + '--verbose', + action='store_true', + dest='verbose', + help='display verbose debug info', + default=False) + parser.add_option( + '-H', + '--header', + action='store_true', + dest='dump_header', + help='dump the mach-o file header', + default=False) + parser.add_option( + '-l', + '--load-commands', + action='store_true', + dest='dump_load_commands', + help='dump the mach-o load commands', + default=False) + parser.add_option( + '-s', + '--symtab', + action='store_true', + dest='dump_symtab', + help='dump the mach-o symbol table', + default=False) + parser.add_option( + '-S', + '--sections', + action='store_true', + dest='dump_sections', + help='dump the mach-o sections', + default=False) + parser.add_option( + '--section', + type='string', + metavar='sectname', + dest='section_names', + action='append', + help='Specify one or more section names to dump', + default=[]) + parser.add_option( + '-o', + '--out', + type='string', + dest='outfile', + help='Used in conjunction with the --section=NAME option to save a single section\'s data to disk.', + default=False) + parser.add_option( + '-i', + '--interactive', + action='store_true', + dest='interactive', + help='enable interactive mode', + default=False) + parser.add_option( + '-m', + '--mangled', + action='store_true', + dest='find_mangled', + help='dump all mangled names in a mach file', + default=False) + parser.add_option( + '-c', + '--compare', + action='store_true', + dest='compare', + help='compare two mach files', + default=False) + parser.add_option( + '-M', + '--extract-modules', + action='store_true', + dest='extract_modules', + help='Extract modules from file', + default=False) + parser.add_option( + '-C', + '--count', + type='int', + dest='max_count', + help='Sets the max byte count when dumping section data', + default=-1) + + (options, mach_files) = parser.parse_args() + if options.extract_modules: + if options.section_names: + print("error: can't use --section option with the --extract-modules option") + exit(1) + if not options.outfile: + print("error: the --output=FILE option must be specified with the --extract-modules option") + exit(1) + options.section_names.append("__apple_ast") + if options.compare: + if len(mach_files) == 2: + mach_a = Mach() + mach_b = Mach() + mach_a.parse(mach_files[0]) + mach_b.parse(mach_files[1]) + mach_a.compare(mach_b) + else: + print('error: --compare takes two mach files as arguments') + else: + if not (options.dump_header or options.dump_load_commands or options.dump_symtab or options.dump_sections or options.find_mangled or options.section_names): + options.dump_header = True + options.dump_load_commands = True + if options.verbose: + print('options', options) + print('mach_files', mach_files) + for path in mach_files: + mach = Mach() + mach.parse(path) + if options.interactive: + interpreter = Mach.Interactive(mach, options) + interpreter.cmdloop() + else: + mach.dump(options) |