System Initiative

# Copyright (c) Meta Platforms, Inc. and affiliates. # # This source code is licensed under both the MIT license found in the # LICENSE-MIT file in the root directory of this source tree and the Apache # License, Version 2.0 found in the LICENSE-APACHE file in the root directory # of this source tree. # pyre-strict from dataclasses import dataclass MH_MAGIC = 0xFEEDFACE MH_CIGAM = 0xCEFAEDFE MH_MAGIC_64 = 0xFEEDFACF MH_CIGAM_64 = 0xCFFAEDFE LC_CODE_SIGNATURE = 0x1D LC_SEGMENT_64 = 0x19 LC_SYMTAB = 0x02 N_OSO = 0x66 class MachO: def __str__(self) -> str: props = {} for k, v in self.__dict__.items(): props[k] = hex(v) return str(props) @dataclass class MachOHeader(MachO): magic: int cpu_type: int cpu_subtype: int file_type: int n_cmds: int size_of_cmds: int flags: int reserved: int @property def is_valid(self) -> bool: return self.magic in (MH_CIGAM_64, MH_MAGIC_64) @dataclass class LoadCommand(MachO): cmd: int cmd_size: int @dataclass class LinkEditCommand(LoadCommand): segment_name: bytes VM_addr: int VM_size: int file_offset: int file_size: int maximum_VM_protection: int initial_VM_protection: int n_sections: int flags: int @dataclass class SymtabCommand(LoadCommand): cmd: int cmd_size: int symtab_offset: int n_symbols: int strtab_offset: int strtab_size: int @dataclass class Symbol(MachO): strtab_index: int sym_type: int section_index: int desc: int value: int