| 1 | ## @file
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| 2 | # OBJCOPY parser, it's used to replace FV
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| 3 | #
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| 4 | # Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
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| 5 | # SPDX-License-Identifier: BSD-2-Clause-Patent
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| 6 | ##
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| 7 |
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| 8 | import argparse
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| 9 | from ctypes import *
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| 10 | import struct
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| 11 |
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| 12 | class ElfSectionHeader64:
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| 13 | def __init__(self, sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link, sh_info, sh_addralign, sh_entsize):
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| 14 | self.sh_name = sh_name
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| 15 | self.sh_type = sh_type
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| 16 | self.sh_flags = sh_flags
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| 17 | self.sh_addr = sh_addr
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| 18 | self.sh_offset = sh_offset
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| 19 | self.sh_size = sh_size
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| 20 | self.sh_link = sh_link
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| 21 | self.sh_info = sh_info
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| 22 | self.sh_addralign = sh_addralign
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| 23 | self.sh_entsize = sh_entsize
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| 24 |
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| 25 | def pack(self):
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| 26 | return struct.pack('<IIQQQQIIQQ', self.sh_name, self.sh_type, self.sh_flags, self.sh_addr, self.sh_offset, self.sh_size, self.sh_link, self.sh_info, self.sh_addralign, self.sh_entsize)
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| 27 |
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| 28 | @classmethod
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| 29 | def unpack(cls, data):
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| 30 | unpacked_data = struct.unpack('<IIQQQQIIQQ', data)
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| 31 | return cls(*unpacked_data)
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| 32 |
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| 33 | class ElfHeader64:
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| 34 | def __init__(self, data):
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| 35 | # Parse the ELF identification bytes
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| 36 | self.e_ident = struct.unpack('16s', data[:16])[0]
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| 37 | self.e_type = struct.unpack('H', data[16:18])[0]
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| 38 | self.e_machine = struct.unpack('H', data[18:20])[0]
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| 39 | self.e_version = struct.unpack('I', data[20:24])[0]
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| 40 | self.e_entry = struct.unpack('Q', data[24:32])[0]
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| 41 | self.e_phoff = struct.unpack('Q', data[32:40])[0]
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| 42 | self.e_shoff = struct.unpack('Q', data[40:48])[0]
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| 43 | self.e_flags = struct.unpack('I', data[48:52])[0]
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| 44 | self.e_ehsize = struct.unpack('H', data[52:54])[0]
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| 45 | self.e_phentsize = struct.unpack('H', data[54:56])[0]
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| 46 | self.e_phnum = struct.unpack('H', data[56:58])[0]
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| 47 | self.e_shentsize = struct.unpack('H', data[58:60])[0]
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| 48 | self.e_shnum = struct.unpack('H', data[60:62])[0]
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| 49 | self.e_shstrndx = struct.unpack('H', data[62:64])[0]
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| 50 |
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| 51 | def pack(self):
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| 52 | # Pack the ELF header data into a binary string
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| 53 | data = b''
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| 54 | data += struct.pack('16s', self.e_ident)
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| 55 | data += struct.pack('H', self.e_type)
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| 56 | data += struct.pack('H', self.e_machine)
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| 57 | data += struct.pack('I', self.e_version)
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| 58 | data += struct.pack('Q', self.e_entry)
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| 59 | data += struct.pack('Q', self.e_phoff)
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| 60 | data += struct.pack('Q', self.e_shoff)
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| 61 | data += struct.pack('I', self.e_flags)
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| 62 | data += struct.pack('H', self.e_ehsize)
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| 63 | data += struct.pack('H', self.e_phentsize)
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| 64 | data += struct.pack('H', self.e_phnum)
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| 65 | data += struct.pack('H', self.e_shentsize)
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| 66 | data += struct.pack('H', self.e_shnum)
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| 67 | data += struct.pack('H', self.e_shstrndx)
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| 68 | return data
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| 69 |
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| 70 | class Elf64_Phdr:
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| 71 | def __init__(self, data):
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| 72 | self.p_type = struct.unpack("<L", data[0:4])[0]
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| 73 | self.p_flags = struct.unpack("<L", data[4:8])[0]
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| 74 | self.p_offset = struct.unpack("<Q", data[8:16])[0]
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| 75 | self.p_vaddr = struct.unpack("<Q", data[16:24])[0]
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| 76 | self.p_paddr = struct.unpack("<Q", data[24:32])[0]
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| 77 | self.p_filesz = struct.unpack("<Q", data[32:40])[0]
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| 78 | self.p_memsz = struct.unpack("<Q", data[40:48])[0]
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| 79 | self.p_align = struct.unpack("<Q", data[48:56])[0]
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| 80 |
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| 81 | def pack(self):
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| 82 | # Pack the Program header table into a binary string
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| 83 | data = b''
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| 84 | data += struct.pack('<L', self.p_type)
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| 85 | data += struct.pack('<L', self.p_flags)
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| 86 | data += struct.pack('<Q', self.p_offset)
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| 87 | data += struct.pack('<Q', self.p_vaddr)
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| 88 | data += struct.pack('<Q', self.p_paddr)
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| 89 | data += struct.pack('<Q', self.p_filesz)
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| 90 | data += struct.pack('<Q', self.p_memsz)
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| 91 | data += struct.pack('<Q', self.p_align)
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| 92 | return data
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| 93 |
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| 94 | class ElfSectionHeader32:
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| 95 | def __init__(self, sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link, sh_info, sh_addralign, sh_entsize):
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| 96 | self.sh_name = sh_name
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| 97 | self.sh_type = sh_type
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| 98 | self.sh_flags = sh_flags
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| 99 | self.sh_addr = sh_addr
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| 100 | self.sh_offset = sh_offset
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| 101 | self.sh_size = sh_size
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| 102 | self.sh_link = sh_link
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| 103 | self.sh_info = sh_info
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| 104 | self.sh_addralign = sh_addralign
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| 105 | self.sh_entsize = sh_entsize
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| 106 |
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| 107 | def pack(self):
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| 108 | return struct.pack('<IIIIIIIIII', self.sh_name, self.sh_type, self.sh_flags, self.sh_addr, self.sh_offset, self.sh_size, self.sh_link, self.sh_info, self.sh_addralign, self.sh_entsize)
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| 109 |
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| 110 | @classmethod
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| 111 | def unpack(cls, data):
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| 112 | unpacked_data = struct.unpack('<IIIIIIIIII', data)
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| 113 | return cls(*unpacked_data)
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| 114 |
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| 115 | class ElfHeader32:
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| 116 | def __init__(self, data):
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| 117 | # Parse the ELF identification bytes
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| 118 | self.e_ident = struct.unpack('16s', data[:16])[0]
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| 119 | self.e_type = struct.unpack('H', data[16:18])[0]
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| 120 | self.e_machine = struct.unpack('H', data[18:20])[0]
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| 121 | self.e_version = struct.unpack('I', data[20:24])[0]
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| 122 | self.e_entry = struct.unpack('I', data[24:28])[0]
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| 123 | self.e_phoff = struct.unpack('I', data[28:32])[0]
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| 124 | self.e_shoff = struct.unpack('I', data[32:36])[0]
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| 125 | self.e_flags = struct.unpack('I', data[36:40])[0]
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| 126 | self.e_ehsize = struct.unpack('H', data[40:42])[0]
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| 127 | self.e_phentsize = struct.unpack('H', data[42:44])[0]
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| 128 | self.e_phnum = struct.unpack('H', data[44:46])[0]
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| 129 | self.e_shentsize = struct.unpack('H', data[46:48])[0]
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| 130 | self.e_shnum = struct.unpack('H', data[48:50])[0]
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| 131 | self.e_shstrndx = struct.unpack('H', data[50:52])[0]
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| 132 |
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| 133 | def pack(self):
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| 134 | # Pack the ELF header data into a binary string
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| 135 | data = b''
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| 136 | data += struct.pack('16s', self.e_ident)
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| 137 | data += struct.pack('H', self.e_type)
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| 138 | data += struct.pack('H', self.e_machine)
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| 139 | data += struct.pack('I', self.e_version)
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| 140 | data += struct.pack('I', self.e_entry)
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| 141 | data += struct.pack('I', self.e_phoff)
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| 142 | data += struct.pack('I', self.e_shoff)
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| 143 | data += struct.pack('I', self.e_flags)
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| 144 | data += struct.pack('H', self.e_ehsize)
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| 145 | data += struct.pack('H', self.e_phentsize)
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| 146 | data += struct.pack('H', self.e_phnum)
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| 147 | data += struct.pack('H', self.e_shentsize)
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| 148 | data += struct.pack('H', self.e_shnum)
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| 149 | data += struct.pack('H', self.e_shstrndx)
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| 150 | return data
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| 151 |
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| 152 | class Elf32_Phdr:
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| 153 | def __init__(self, data):
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| 154 | self.p_type = struct.unpack("<L", data[0:4])[0]
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| 155 | self.p_offset = struct.unpack("<L", data[4:8])[0]
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| 156 | self.p_vaddr = struct.unpack("<L", data[8:12])[0]
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| 157 | self.p_paddr = struct.unpack("<L", data[12:16])[0]
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| 158 | self.p_filesz = struct.unpack("<L", data[16:20])[0]
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| 159 | self.p_memsz = struct.unpack("<L", data[20:24])[0]
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| 160 | self.p_flags = struct.unpack("<L", data[24:28])[0]
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| 161 | self.p_align = struct.unpack("<L", data[28:32])[0]
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| 162 |
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| 163 | def pack(self):
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| 164 | # Pack the Program header table into a binary string
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| 165 | data = b''
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| 166 | data += struct.pack('<L', self.p_type)
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| 167 | data += struct.pack('<L', self.p_offset)
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| 168 | data += struct.pack('<L', self.p_vaddr)
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| 169 | data += struct.pack('<L', self.p_paddr)
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| 170 | data += struct.pack('<L', self.p_filesz)
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| 171 | data += struct.pack('<L', self.p_memsz)
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| 172 | data += struct.pack('<L', self.p_flags)
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| 173 | data += struct.pack('<L', self.p_align)
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| 174 | return data
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| 175 |
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| 176 | def SectionAlignment(NewUPLEntry, AlignmentIndex):
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| 177 | # Section entry Alignment
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| 178 | # Alignment is transfer to integer if AlignmentIndex is string.
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| 179 | if isinstance(AlignmentIndex, str):
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| 180 | int_num = int(AlignmentIndex, 16)
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| 181 | int_num = 10 * (int_num//16) + int_num % 16
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| 182 | else:
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| 183 | int_num = AlignmentIndex
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| 184 | if (int_num != 0 or int_num != 1):
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| 185 | if ((len(NewUPLEntry) % int_num) != 0):
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| 186 | AlignNumber = int_num - (len(NewUPLEntry) % int_num)
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| 187 | if (AlignNumber != 0):
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| 188 | for x in range(AlignNumber):
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| 189 | NewUPLEntry = NewUPLEntry + bytearray(b'\0')
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| 190 | return NewUPLEntry
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| 191 |
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| 192 | def SectionEntryFill(SectionEntry, Alignment, Value, Offset):
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| 193 | # Alignment
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| 194 | n = 0
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| 195 | if (len (Value) < Alignment):
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| 196 | Value = Value.zfill(Alignment)
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| 197 | for x in range(0, (Alignment//2)):
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| 198 | Index = '0x' + Value[n] + Value[n + 1]
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| 199 | SectionEntry[Offset - x] = int(Index,16)
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| 200 | n += 2
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| 201 | return SectionEntry
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| 202 |
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| 203 | def ElfHeaderParser(UPLEntry):
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| 204 | # Read EI_CLASS, it stores information that elf with 32-bit or 64-bit architectures.
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| 205 | EI_CLASS = UPLEntry[4]
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| 206 | # If Elf is 64-bit objects.
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| 207 | if (EI_CLASS == 2):
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| 208 | # Elf header is stored at 0x0-0x40 in 64-bits objects
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| 209 | ElfHeaderData = UPLEntry[:64]
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| 210 | # If Elf is 32-bit objects.
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| 211 | else:
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| 212 | # Elf header is stored at 0x0-0x34 in 32-bits objects
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| 213 | ElfHeaderData = UPLEntry[:53]
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| 214 | # If Elf is 64-bit objects.
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| 215 | if (EI_CLASS == 2):
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| 216 | elf_header = ElfHeader64(ElfHeaderData)
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| 217 | ElfHeaderOffset = elf_header.e_shoff
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| 218 | SectionHeaderEntryNumber = elf_header.e_shnum
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| 219 | StringIndexNumber = elf_header.e_shstrndx
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| 220 | SectionHeaderEntrySize = elf_header.e_shentsize
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| 221 | StringIndexEntryOffset = ElfHeaderOffset + (StringIndexNumber * SectionHeaderEntrySize)
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| 222 | unpacked_header = ElfSectionHeader64.unpack(UPLEntry[StringIndexEntryOffset: (StringIndexEntryOffset + SectionHeaderEntrySize)])
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| 223 | StringIndexSize = unpacked_header.sh_size
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| 224 | StringIndexOffset = unpacked_header.sh_offset
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| 225 | # If elf is 32-bit objects.
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| 226 | else:
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| 227 | elf_header = ElfHeader32(ElfHeaderData)
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| 228 | ElfHeaderOffset = elf_header.e_shoff
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| 229 | SectionHeaderEntryNumber = elf_header.e_shnum
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| 230 | StringIndexNumber = elf_header.e_shstrndx
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| 231 | SectionHeaderEntrySize = elf_header.e_shentsize
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| 232 | StringIndexEntryOffset = ElfHeaderOffset + (StringIndexNumber * SectionHeaderEntrySize)
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| 233 | unpacked_header = ElfSectionHeader32.unpack(UPLEntry[StringIndexEntryOffset: (StringIndexEntryOffset + SectionHeaderEntrySize)])
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| 234 | StringIndexSize = unpacked_header.sh_size
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| 235 | StringIndexOffset = unpacked_header.sh_offset
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| 236 | return ElfHeaderOffset, SectionHeaderEntryNumber, StringIndexNumber, StringIndexEntryOffset, StringIndexSize, SectionHeaderEntrySize, StringIndexOffset, EI_CLASS
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| 237 |
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| 238 | def FindSection(UPLEntry, SectionName):
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| 239 | ElfHeaderOffset, SectionHeaderEntryNumber, StringIndexNumber, _, StringIndexSize, SectionHeaderEntrySize, StringIndexOffset, EI_CLASS = ElfHeaderParser(UPLEntry)
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| 240 | # StringIndex is String Index section
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| 241 | StringIndex = UPLEntry[StringIndexOffset:StringIndexOffset+StringIndexSize]
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| 242 | # Section header isn't exist if SectionNameOffset = -1.
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| 243 | StringIndex = StringIndex.decode('utf-8', errors='ignore')
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| 244 | SectionNameOffset = StringIndex.find(SectionName)
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| 245 | return SectionNameOffset, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, StringIndexOffset, StringIndexNumber, EI_CLASS
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| 246 |
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| 247 | def AddNewSectionEntry64(LastUPLEntrylen, StringIndexValue, SectionSize, Alignment):
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| 248 | # If elf is 64-bit objects.
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| 249 | NewSectionEntry = ElfSectionHeader64 (StringIndexValue, 1, 0, 0, LastUPLEntrylen, SectionSize, 0, 0, Alignment, 0)
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| 250 | sh_bytes = NewSectionEntry.pack()
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| 251 | return sh_bytes
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| 252 |
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| 253 | def AddNewSectionEntry32(LastUPLEntrylen, StringIndexValue, SectionSize, Alignment):
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| 254 | # If elf is 32-bit objects.
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| 255 | NewSectionEntry = ElfSectionHeader32 (StringIndexValue, 1, 0, 0, LastUPLEntrylen, SectionSize, 0, 0, Alignment, 0)
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| 256 | sh_bytes = NewSectionEntry.pack()
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| 257 | return sh_bytes
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| 258 |
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| 259 | def AddSectionHeader64(SHentry, NewUPLEntrylen, SectionHeaderEntrySize, Index, RemoveNameOffset, SectionName, StringIndexNumber):
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| 260 | SHentry = bytearray(SHentry)
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| 261 | unpacked_header = ElfSectionHeader64.unpack(SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
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| 262 | # Section header of section 0 shows 0. It don't modify any offset.
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| 263 | if (Index != 0):
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| 264 | # read section offset.
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| 265 | unpacked_header.sh_offset = NewUPLEntrylen
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| 266 | # Modify offset of name in section entry
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| 267 | # if RemoveNameOffset != 0 that is remove function.
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| 268 | if (RemoveNameOffset != 0):
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| 269 | if (unpacked_header.sh_name > RemoveNameOffset):
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| 270 | unpacked_header.sh_name -= len (SectionName)
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| 271 | # Modify size of name string section entry in section entry.
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| 272 | if (Index == StringIndexNumber):
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| 273 | unpacked_header.sh_size -= len (SectionName)
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| 274 | # added section
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| 275 | else :
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| 276 | if (Index == StringIndexNumber):
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| 277 | unpacked_header.sh_size += len (SectionName)
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| 278 | NewSHentry = ElfSectionHeader64 (
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| 279 | unpacked_header.sh_name,
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| 280 | unpacked_header.sh_type,
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| 281 | unpacked_header.sh_flags,
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| 282 | unpacked_header.sh_addr,
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| 283 | unpacked_header.sh_offset,
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| 284 | unpacked_header.sh_size,
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| 285 | unpacked_header.sh_link,
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| 286 | unpacked_header.sh_info,
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| 287 | unpacked_header.sh_addralign,
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| 288 | unpacked_header.sh_entsize).pack()
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| 289 | return NewSHentry
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| 290 |
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| 291 | def AddSectionHeader32(SHentry, NewUPLEntrylen, SectionHeaderEntrySize, Index, RemoveNameOffset, SectionName, StringIndexNumber):
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| 292 | SHentry = bytearray(SHentry)
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| 293 | unpacked_header = ElfSectionHeader32.unpack(SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
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| 294 | if (Index != 0):
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| 295 | NewSHentry = SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)]
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| 296 | unpacked_header.sh_offset = NewUPLEntrylen
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| 297 | # Modify offset of name in section entry
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| 298 | # if RemoveNameOffset != 0 that is remove function.
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| 299 | if (RemoveNameOffset != 0):
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| 300 | if (unpacked_header.sh_name > RemoveNameOffset):
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| 301 | unpacked_header.sh_name -= len (SectionName)
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| 302 | # Modify size of name string section entry in section entry.
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| 303 | if (Index == StringIndexNumber):
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| 304 | unpacked_header.sh_size -= len (SectionName)
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| 305 | # added section
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| 306 | else :
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| 307 | if (Index == StringIndexNumber):
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| 308 | unpacked_header.sh_size += len (SectionName)
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| 309 | NewSHentry = ElfSectionHeader32 (
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| 310 | unpacked_header.sh_name,
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| 311 | unpacked_header.sh_type,
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| 312 | unpacked_header.sh_flags,
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| 313 | unpacked_header.sh_addr,
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| 314 | unpacked_header.sh_offset,
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| 315 | unpacked_header.sh_size,
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| 316 | unpacked_header.sh_link,
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| 317 | unpacked_header.sh_info,
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| 318 | unpacked_header.sh_addralign,
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| 319 | unpacked_header.sh_entsize).pack()
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| 320 | return NewSHentry
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| 321 |
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| 322 | def ModifyPHSegmentOffset64(NewUPLEntry, ElfHeaderOffset, PHSegmentName):
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| 323 | # Modify offset and address of program header tables.
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| 324 | elf_header = ElfHeader64(NewUPLEntry[:64])
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| 325 | SHentry = NewUPLEntry[ElfHeaderOffset:]
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| 326 | # Elf program header tables start from 0x40 in 64-bits objects
|
|---|
| 327 | PHentry = NewUPLEntry[64: 64 + (elf_header.e_phnum * elf_header.e_phentsize)]
|
|---|
| 328 | PHdrs = []
|
|---|
| 329 | SHdrs = []
|
|---|
| 330 | for i in range(elf_header.e_shnum):
|
|---|
| 331 | SHData = SHentry[(i * elf_header.e_shentsize): (i * elf_header.e_shentsize) + elf_header.e_shentsize]
|
|---|
| 332 | unpacked_SectionHeader = ElfSectionHeader64.unpack(SHData)
|
|---|
| 333 | SHdrs.append(unpacked_SectionHeader)
|
|---|
| 334 | for i in range(elf_header.e_phnum):
|
|---|
| 335 | PHData = PHentry[(i * elf_header.e_phentsize): (i * elf_header.e_phentsize) + elf_header.e_phentsize]
|
|---|
| 336 | unpacked_ProgramHeader = Elf64_Phdr(PHData)
|
|---|
| 337 | PHdrs.append(unpacked_ProgramHeader)
|
|---|
| 338 | if (PHSegmentName == '.text'):
|
|---|
| 339 | PHdrs[0].p_offset = SHdrs[1].sh_offset
|
|---|
| 340 | PHdrs[0].p_paddr = SHdrs[1].sh_addr
|
|---|
| 341 | PHdrs[4].p_offset = SHdrs[1].sh_offset
|
|---|
| 342 | PHdrs[4].p_paddr = SHdrs[1].sh_addr
|
|---|
| 343 | elif (PHSegmentName == '.dynamic'):
|
|---|
| 344 | PHdrs[1].p_offset = SHdrs[2].sh_offset
|
|---|
| 345 | PHdrs[1].p_paddr = SHdrs[2].sh_addr
|
|---|
| 346 | PHdrs[3].p_offset = SHdrs[2].sh_offset
|
|---|
| 347 | PHdrs[3].p_paddr = SHdrs[2].sh_addr
|
|---|
| 348 | elif (PHSegmentName == '.data'):
|
|---|
| 349 | PHdrs[2].p_offset = SHdrs[3].sh_offset
|
|---|
| 350 | PHdrs[2].p_paddr = SHdrs[3].sh_addr
|
|---|
| 351 | packed_PHData = b''
|
|---|
| 352 | for phdr in PHdrs:
|
|---|
| 353 | packed_PHData += phdr.pack()
|
|---|
| 354 | NewUPLEntry = bytearray(NewUPLEntry)
|
|---|
| 355 | NewUPLEntry[64: 64 + (elf_header.e_phnum * elf_header.e_phentsize)] = packed_PHData
|
|---|
| 356 | return NewUPLEntry
|
|---|
| 357 |
|
|---|
| 358 | def ModifyPHSegmentOffset32(NewUPLEntry, ElfHeaderOffset, PHSegmentName):
|
|---|
| 359 | # Modify offset and address of program header tables.
|
|---|
| 360 | # Elf header is stored at 0x0-0x34 in 32-bits objects
|
|---|
| 361 | elf_header = ElfHeader32(NewUPLEntry[:52])
|
|---|
| 362 | SHentry = NewUPLEntry[ElfHeaderOffset:]
|
|---|
| 363 | # Elf program header tables start from 0x34 in 32-bits objects
|
|---|
| 364 | PHentry = NewUPLEntry[52: 52 + (elf_header.e_phnum * elf_header.e_phentsize)]
|
|---|
| 365 | PHdrs = []
|
|---|
| 366 | SHdrs = []
|
|---|
| 367 | for i in range(elf_header.e_shnum):
|
|---|
| 368 | SHData = SHentry[(i * elf_header.e_shentsize): (i * elf_header.e_shentsize) + elf_header.e_shentsize]
|
|---|
| 369 | unpacked_SectionHeader = ElfSectionHeader32.unpack(SHData)
|
|---|
| 370 | SHdrs.append(unpacked_SectionHeader)
|
|---|
| 371 | for i in range(elf_header.e_phnum):
|
|---|
| 372 | PHData = PHentry[(i * elf_header.e_phentsize): (i * elf_header.e_phentsize) + elf_header.e_phentsize]
|
|---|
| 373 | unpacked_ProgramHeader = Elf32_Phdr(PHData)
|
|---|
| 374 | PHdrs.append(unpacked_ProgramHeader)
|
|---|
| 375 | if (PHSegmentName == '.text'):
|
|---|
| 376 | PHdrs[0].p_offset = SHdrs[1].sh_offset
|
|---|
| 377 | PHdrs[0].p_paddr = SHdrs[1].sh_addr
|
|---|
| 378 | PHdrs[0].p_vaddr = SHdrs[1].sh_addr
|
|---|
| 379 | PHdrs[2].p_offset = SHdrs[1].sh_offset
|
|---|
| 380 | PHdrs[2].p_paddr = SHdrs[1].sh_addr
|
|---|
| 381 | PHdrs[0].p_vaddr = SHdrs[1].sh_addr
|
|---|
| 382 | elif (PHSegmentName == '.data'):
|
|---|
| 383 | PHdrs[1].p_offset = SHdrs[2].sh_offset
|
|---|
| 384 | PHdrs[1].p_paddr = SHdrs[2].sh_addr
|
|---|
| 385 | PHdrs[1].p_vaddr = SHdrs[2].sh_addr
|
|---|
| 386 | packed_PHData = b''
|
|---|
| 387 | for phdr in PHdrs:
|
|---|
| 388 | packed_PHData += phdr.pack()
|
|---|
| 389 | NewUPLEntry = bytearray(NewUPLEntry)
|
|---|
| 390 | NewUPLEntry[52: 52 + (elf_header.e_phnum * elf_header.e_phentsize)] = packed_PHData
|
|---|
| 391 | return NewUPLEntry
|
|---|
| 392 |
|
|---|
| 393 | def RemoveSection64(UniversalPayloadEntry, RemoveSectionName):
|
|---|
| 394 | # If elf is 64-bit objects.
|
|---|
| 395 | # Get offsets as follows:
|
|---|
| 396 | # 1. Section name which will remove in section name string.
|
|---|
| 397 | # 2. Section which will remove.
|
|---|
| 398 | # 3. Section header which will remove.
|
|---|
| 399 | with open(UniversalPayloadEntry,'rb') as f:
|
|---|
| 400 | UPLEntry = f.read()
|
|---|
| 401 | RemoveSectionNameOffset, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, _ = FindSection(UPLEntry, RemoveSectionName)
|
|---|
| 402 | if (RemoveSectionNameOffset == -1):
|
|---|
| 403 | raise argparse.ArgumentTypeError ('Section: {} not found.'.format (RemoveSectionNameOffset))
|
|---|
| 404 | # Read section header entry
|
|---|
| 405 | SHentry = UPLEntry[ElfHeaderOffset:]
|
|---|
| 406 | # find deleted fv section offset.
|
|---|
| 407 | # Elf header is stored at 0x0-0x40 in 64-bits objects
|
|---|
| 408 | elf_header = ElfHeader64(UPLEntry[:64])
|
|---|
| 409 | Counter = 0
|
|---|
| 410 | RemoveIndex = 0
|
|---|
| 411 | RemoveNameOffset = 0
|
|---|
| 412 | for Index in range(0, elf_header.e_shnum):
|
|---|
| 413 | # Read Index of section header.
|
|---|
| 414 | unpacked_SectionHeader = ElfSectionHeader64.unpack(SHentry[(Index * elf_header.e_shentsize):((Index * elf_header.e_shentsize) + elf_header.e_shentsize)])
|
|---|
| 415 | # Find offset of section name which is removed.
|
|---|
| 416 | if (unpacked_SectionHeader.sh_name == RemoveSectionNameOffset):
|
|---|
| 417 | RemoveIndex = Counter
|
|---|
| 418 | Counter += 1
|
|---|
| 419 | else:
|
|---|
| 420 | Counter += 1
|
|---|
| 421 | # Elf header is recombined.
|
|---|
| 422 | # Elf header and program header table in front of first section are reserved.
|
|---|
| 423 | # Elf header size is 0x40 with 64-bit object.
|
|---|
| 424 | ElfHeaderSize = 64
|
|---|
| 425 | ElfHandPH = ElfHeaderSize + (elf_header.e_phnum * elf_header.e_phentsize)
|
|---|
| 426 | NewUPLEntry = UPLEntry[:ElfHandPH]
|
|---|
| 427 | # Keep Section header and program header table, RemoveSection64() only recombined section and section header.
|
|---|
| 428 | NewUPLEntry = bytearray(NewUPLEntry)
|
|---|
| 429 | # Sections is recombined.
|
|---|
| 430 | # 1. name of deleted section is removed in name string section.
|
|---|
| 431 | # 2. deleted section is removed in dll file.
|
|---|
| 432 | # 3. re-align sections before and after deleted section.
|
|---|
| 433 | NewUPLEntrylen = []
|
|---|
| 434 | for Index in range(0, (SectionHeaderEntryNumber)):
|
|---|
| 435 | unpacked_SectionHeader = ElfSectionHeader64.unpack(SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 436 | NewUPLEntrylen.append(len(NewUPLEntry))
|
|---|
| 437 | if (Index == 0):
|
|---|
| 438 | # Address alignment, section will align with alignment of next section.
|
|---|
| 439 | AlignmentIndex = 8
|
|---|
| 440 | if (SectionHeaderEntryNumber > 2):
|
|---|
| 441 | unpacked_NextSectionHeader = ElfSectionHeader64.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 442 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 443 | # Section in front of removed section
|
|---|
| 444 | elif (Index + 1 == RemoveIndex):
|
|---|
| 445 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 446 | # Read section address alignment
|
|---|
| 447 | # If section that will be removed in .dll is not first and last one .
|
|---|
| 448 | # Address alignment, section will align with alignment of section after deleted section.
|
|---|
| 449 | # Check next and the section after next are not end of section.
|
|---|
| 450 | if ((Index + 2) < (SectionHeaderEntryNumber - 1)):
|
|---|
| 451 | unpacked_Next2SectionHeader = ElfSectionHeader64.unpack(SHentry[((Index + 2) * SectionHeaderEntrySize):(((Index + 2) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 452 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_Next2SectionHeader.sh_addralign)
|
|---|
| 453 | else:
|
|---|
| 454 | # It is align 8 bytes if next section or the section after next is last one.
|
|---|
| 455 | AlignmentIndex = 8
|
|---|
| 456 | NewUPLEntry = SectionAlignment(NewUPLEntry, AlignmentIndex)
|
|---|
| 457 | # section is Deleted section
|
|---|
| 458 | elif (Index == RemoveIndex):
|
|---|
| 459 | # Don't add removed section to elf.
|
|---|
| 460 | # Find offset of section name.
|
|---|
| 461 | RemoveNameOffset = unpacked_SectionHeader.sh_name
|
|---|
| 462 | # section is name string section.
|
|---|
| 463 | elif (Index == StringIndexNumber):
|
|---|
| 464 | # StringIndex is String Index section
|
|---|
| 465 | StringIndex = UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 466 | # Remove name of removed section in name string section.
|
|---|
| 467 | # Section header isn't exist if RemoveSectionNameOffset equal to -1.
|
|---|
| 468 | StringIndex = bytearray(StringIndex)
|
|---|
| 469 | RemoveSectionName = bytearray(RemoveSectionName, encoding='utf-8')
|
|---|
| 470 | RemoveSectionName = RemoveSectionName + bytes('\0', encoding='utf-8')
|
|---|
| 471 | StringIndex = StringIndex.replace(RemoveSectionName,b'')
|
|---|
| 472 | NewUPLEntry += StringIndex
|
|---|
| 473 | # other sections.
|
|---|
| 474 | else:
|
|---|
| 475 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 476 | # Address alignment, section will align with alignment of next section.
|
|---|
| 477 | if (Index < (SectionHeaderEntryNumber - 1)):
|
|---|
| 478 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 479 | else:
|
|---|
| 480 | # If section is last one.
|
|---|
| 481 | AlignmentIndex = 8
|
|---|
| 482 | NewUPLEntry = SectionAlignment(NewUPLEntry, AlignmentIndex)
|
|---|
| 483 | SectionHeaderOffset = len(NewUPLEntry)
|
|---|
| 484 | # Add section header
|
|---|
| 485 | for Number in range(0, (SectionHeaderEntryNumber)):
|
|---|
| 486 | if (Number != RemoveIndex):
|
|---|
| 487 | NewSHentry = AddSectionHeader64(SHentry, NewUPLEntrylen[Number], SectionHeaderEntrySize, Number, RemoveNameOffset, RemoveSectionName, StringIndexNumber)
|
|---|
| 488 | NewUPLEntry += NewSHentry
|
|---|
| 489 | # Modify number of sections and offset of section header in Elf header.
|
|---|
| 490 | elf_header.e_shoff = SectionHeaderOffset
|
|---|
| 491 | elf_header.e_shnum -= 1
|
|---|
| 492 | NewUPLEntry = elf_header.pack() + NewUPLEntry[64:]
|
|---|
| 493 | # write to Elf.
|
|---|
| 494 | with open(UniversalPayloadEntry,'wb') as f:
|
|---|
| 495 | f.write(NewUPLEntry)
|
|---|
| 496 |
|
|---|
| 497 | def RemoveSection32(UniversalPayloadEntry, RemoveSectionName):
|
|---|
| 498 | # If elf is 32-bit objects.
|
|---|
| 499 | # Get offsets as follows:
|
|---|
| 500 | # 1. Section name which will remove in section name string.
|
|---|
| 501 | # 2. Section which will remove.
|
|---|
| 502 | # 3. Section header which will remove.
|
|---|
| 503 | with open(UniversalPayloadEntry,'rb') as f:
|
|---|
| 504 | UPLEntry = f.read()
|
|---|
| 505 | RemoveSectionNameOffset, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, EI_CLASS = FindSection(UPLEntry, RemoveSectionName)
|
|---|
| 506 | if (RemoveSectionNameOffset == -1):
|
|---|
| 507 | raise argparse.ArgumentTypeError ('Section: {} not found.'.format (RemoveSectionNameOffset))
|
|---|
| 508 | # Read section header entry
|
|---|
| 509 | SHentry = UPLEntry[ElfHeaderOffset:]
|
|---|
| 510 | # find deleted fv section offset.
|
|---|
| 511 | # Elf header is stored at 0x0-0x34 in 32-bits objects
|
|---|
| 512 | elf_header = ElfHeader32(UPLEntry[:52])
|
|---|
| 513 | Counter = 0
|
|---|
| 514 | RemoveIndex = 0
|
|---|
| 515 | RemoveNameOffset = 0
|
|---|
| 516 | for Index in range(0, elf_header.e_shnum):
|
|---|
| 517 | # Read Index of section header.
|
|---|
| 518 | unpacked_SectionHeader = ElfSectionHeader32.unpack(SHentry[(Index * elf_header.e_shentsize):((Index * elf_header.e_shentsize) + elf_header.e_shentsize)])
|
|---|
| 519 | # Find offset of section name which is removed.
|
|---|
| 520 | if (unpacked_SectionHeader.sh_name == RemoveSectionNameOffset):
|
|---|
| 521 | RemoveIndex = Counter
|
|---|
| 522 | Counter += 1
|
|---|
| 523 | else:
|
|---|
| 524 | Counter += 1
|
|---|
| 525 | # Elf header is recombined.
|
|---|
| 526 | # Elf header and program header table in front of first section are reserved.
|
|---|
| 527 | # Elf header size is 0x34 with 32-bit object.
|
|---|
| 528 | ElfHeaderSize = 52
|
|---|
| 529 | ElfHandPH = ElfHeaderSize + (elf_header.e_phnum * elf_header.e_phentsize)
|
|---|
| 530 | NewUPLEntry = UPLEntry[:ElfHandPH]
|
|---|
| 531 | # Keep Section header and program header table, RemoveSection32() only recombined section and section header.
|
|---|
| 532 | NewUPLEntry = bytearray(NewUPLEntry)
|
|---|
| 533 | # Sections is recombined.
|
|---|
| 534 | # 1. name of deleted section is removed in name string section.
|
|---|
| 535 | # 2. deleted section is removed in dll file.
|
|---|
| 536 | # 3. re-align sections before and after deleted section.
|
|---|
| 537 | NewUPLEntrylen = []
|
|---|
| 538 | for Index in range(0, (SectionHeaderEntryNumber)):
|
|---|
| 539 | unpacked_SectionHeader = ElfSectionHeader32.unpack(SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 540 | NewUPLEntrylen.append(len(NewUPLEntry))
|
|---|
| 541 | if (Index == 0):
|
|---|
| 542 | # Address alignment, section will align with alignment of next section.
|
|---|
| 543 | AlignmentIndex = 8
|
|---|
| 544 | if (SectionHeaderEntryNumber > 2):
|
|---|
| 545 | unpacked_NextSectionHeader = ElfSectionHeader32.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 546 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 547 | # Section in front of removed section
|
|---|
| 548 | elif (Index + 1 == RemoveIndex):
|
|---|
| 549 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 550 | # Read section address alignment
|
|---|
| 551 | # If section that will be removed in .dll is not first and last one .
|
|---|
| 552 | # Address alignment, section will align with alignment of section after deleted section.
|
|---|
| 553 | # Check next and the section after next are not end of section.
|
|---|
| 554 | if ((Index + 2) < (SectionHeaderEntryNumber - 1)):
|
|---|
| 555 | unpacked_Next2SectionHeader = ElfSectionHeader32.unpack(SHentry[((Index + 2) * SectionHeaderEntrySize):(((Index + 2) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 556 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_Next2SectionHeader.sh_addralign)
|
|---|
| 557 | else:
|
|---|
| 558 | # It is align 8 bytes if next section or the section after next is last one.
|
|---|
| 559 | AlignmentIndex = 8
|
|---|
| 560 | NewUPLEntry = SectionAlignment(NewUPLEntry, AlignmentIndex)
|
|---|
| 561 | # section is Deleted section
|
|---|
| 562 | elif (Index == RemoveIndex):
|
|---|
| 563 | # Don't add removed section to elf.
|
|---|
| 564 | # Find offset of section name.
|
|---|
| 565 | RemoveNameOffset = unpacked_SectionHeader.sh_name
|
|---|
| 566 | # section is name string section.
|
|---|
| 567 | elif (Index == StringIndexNumber):
|
|---|
| 568 | # StringIndex is String Index section
|
|---|
| 569 | StringIndex = UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 570 | # Remove name of removed section in name string section.
|
|---|
| 571 | # Section header isn't exist if RemoveSectionNameOffset equal to -1.
|
|---|
| 572 | StringIndex = bytearray(StringIndex)
|
|---|
| 573 | RemoveSectionName = bytearray(RemoveSectionName, encoding='utf-8')
|
|---|
| 574 | RemoveSectionName = RemoveSectionName + bytes('\0', encoding='utf-8')
|
|---|
| 575 | StringIndex = StringIndex.replace(RemoveSectionName,b'')
|
|---|
| 576 | NewUPLEntry += StringIndex
|
|---|
| 577 | # other sections.
|
|---|
| 578 | else:
|
|---|
| 579 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 580 | # Address alignment, section will align with alignment of next section.
|
|---|
| 581 | if (Index < (SectionHeaderEntryNumber - 1)):
|
|---|
| 582 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 583 | else:
|
|---|
| 584 | # If section is last one.
|
|---|
| 585 | AlignmentIndex = 8
|
|---|
| 586 | NewUPLEntry = SectionAlignment(NewUPLEntry, AlignmentIndex)
|
|---|
| 587 | SectionHeaderOffset = len(NewUPLEntry)
|
|---|
| 588 | # Add section header
|
|---|
| 589 | for Number in range(0, (SectionHeaderEntryNumber)):
|
|---|
| 590 | if (Number != RemoveIndex):
|
|---|
| 591 | NewSHentry = AddSectionHeader32(SHentry, NewUPLEntrylen[Number], SectionHeaderEntrySize, Number, RemoveNameOffset, RemoveSectionName, StringIndexNumber)
|
|---|
| 592 | NewUPLEntry += NewSHentry
|
|---|
| 593 | # Modify number of sections and offset of section header in Elf header.
|
|---|
| 594 | elf_header.e_shoff = SectionHeaderOffset
|
|---|
| 595 | elf_header.e_shnum -= 1
|
|---|
| 596 | NewUPLEntry = elf_header.pack() + NewUPLEntry[52:]
|
|---|
| 597 | # write to Elf.
|
|---|
| 598 | with open(UniversalPayloadEntry,'wb') as f:
|
|---|
| 599 | f.write(NewUPLEntry)
|
|---|
| 600 |
|
|---|
| 601 | def AddSection64(UniversalPayloadEntry, AddSectionName, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, StringIndexNumber, FileBinary, Alignment):
|
|---|
| 602 | with open(UniversalPayloadEntry,'rb+') as f:
|
|---|
| 603 | UPLEntry = f.read()
|
|---|
| 604 | fFileBinary = open(FileBinary, 'rb')
|
|---|
| 605 | Binary_File = fFileBinary.read()
|
|---|
| 606 | ElfHeaderOffset, SectionHeaderEntryNumber, StringIndexNumber, _, _, SectionHeaderEntrySize, _, _ = ElfHeaderParser(UPLEntry)
|
|---|
| 607 | # Read section header entry
|
|---|
| 608 | SHentry = UPLEntry[ElfHeaderOffset:]
|
|---|
| 609 | # Elf header is recombined.
|
|---|
| 610 | # Elf header and program header table in front of first section are reserved.
|
|---|
| 611 | # Elf header is stored at 0x0-0x40 in 64-bits objects
|
|---|
| 612 | elf_header = ElfHeader64(UPLEntry[:64])
|
|---|
| 613 | # Elf header size is 0x40 with 64-bit object.
|
|---|
| 614 | ElfHeaderSize = 64
|
|---|
| 615 | ElfHandPH = ElfHeaderSize + (elf_header.e_phnum * elf_header.e_phentsize)
|
|---|
| 616 | NewUPLEntry = UPLEntry[:ElfHandPH]
|
|---|
| 617 | # Keep Section header and program header table, AddSection64() only recombined section and section header.
|
|---|
| 618 | NewUPLEntry = bytearray(NewUPLEntry)
|
|---|
| 619 | # Sections is recombined.
|
|---|
| 620 | # 1. name of added section is added in name string section.
|
|---|
| 621 | # 2. added section is added in dll file.
|
|---|
| 622 | # 3. re-align sections before and after added section.
|
|---|
| 623 | NewUPLEntrylen = []
|
|---|
| 624 | StringIndexValue = 0
|
|---|
| 625 | for Index in range(0, SectionHeaderEntryNumber):
|
|---|
| 626 | NewUPLEntrylen.append(len(NewUPLEntry))
|
|---|
| 627 | unpacked_SectionHeader = ElfSectionHeader64.unpack(SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 628 | # Sections is recombined.
|
|---|
| 629 | if (Index == 0):
|
|---|
| 630 | # Address alignment, section will align with alignment of next section.
|
|---|
| 631 | AlignmentIndex = 8
|
|---|
| 632 | if (SectionHeaderEntryNumber > 2):
|
|---|
| 633 | unpacked_NextSectionHeader = ElfSectionHeader64.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 634 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 635 | # Section is last one.
|
|---|
| 636 | elif (Index == (SectionHeaderEntryNumber - 1)):
|
|---|
| 637 | # Add new section at the end.
|
|---|
| 638 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 639 | NewUPLEntry = SectionAlignment(NewUPLEntry, Alignment)
|
|---|
| 640 | LastUPLEntrylen = len(NewUPLEntry)
|
|---|
| 641 | NewUPLEntry += Binary_File
|
|---|
| 642 | # Address alignment, section will align with alignment of next section.
|
|---|
| 643 | AlignmentIndex = 8
|
|---|
| 644 | NewUPLEntry = SectionAlignment(NewUPLEntry, AlignmentIndex)
|
|---|
| 645 | # section is name string section.
|
|---|
| 646 | elif (Index == StringIndexNumber):
|
|---|
| 647 | # StringIndex is String Index section
|
|---|
| 648 | StringIndex = UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 649 | # Read name of added Section after StringIndex is transform into string.
|
|---|
| 650 | StringIndex = bytearray(StringIndex)
|
|---|
| 651 | StringIndexValue = len(StringIndex)
|
|---|
| 652 | AddSectionName = bytearray(AddSectionName, encoding='utf-8') + bytes('\0', encoding='utf-8')
|
|---|
| 653 | StringIndex += AddSectionName
|
|---|
| 654 | NewUPLEntry += StringIndex
|
|---|
| 655 | # section after name string section but not last one.
|
|---|
| 656 | elif ((Index > StringIndexNumber) and (Index < (SectionHeaderEntryNumber - 1))):
|
|---|
| 657 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 658 | # Address alignment, section will align with alignment of next section.
|
|---|
| 659 | unpacked_NextSectionHeader = ElfSectionHeader64.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 660 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 661 | # Section before name string section.
|
|---|
| 662 | else:
|
|---|
| 663 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 664 | # Address alignment, section will align with alignment of next section.
|
|---|
| 665 | if (Index < (SectionHeaderEntryNumber - 1)):
|
|---|
| 666 | unpacked_NextSectionHeader = ElfSectionHeader64.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 667 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 668 | SectionHeaderOffset = len(NewUPLEntry)
|
|---|
| 669 | RemoveNameOffset = 0
|
|---|
| 670 | # Add section header
|
|---|
| 671 | for Number in range(0, (SectionHeaderEntryNumber)):
|
|---|
| 672 | NewSHentry = AddSectionHeader64(SHentry, NewUPLEntrylen[Number], SectionHeaderEntrySize, Number, RemoveNameOffset, AddSectionName, StringIndexNumber)
|
|---|
| 673 | NewUPLEntry += NewSHentry
|
|---|
| 674 | NewUPLEntry += bytearray(AddNewSectionEntry64(LastUPLEntrylen, StringIndexValue, len(Binary_File), Alignment))
|
|---|
| 675 | # Modify number of sections and offset of section header in Elf header.
|
|---|
| 676 | # Modify offset in in Elf header.
|
|---|
| 677 | elf_header.e_shoff = SectionHeaderOffset
|
|---|
| 678 | elf_header.e_shnum += 1
|
|---|
| 679 | elf_header = elf_header.pack()
|
|---|
| 680 | UPLEntryBin = elf_header + NewUPLEntry[64:]
|
|---|
| 681 | # Modify offsets and address of program header table in elf.
|
|---|
| 682 | PHSegmentName = '.text'
|
|---|
| 683 | _, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, _ = FindSection(UPLEntryBin, PHSegmentName)
|
|---|
| 684 | UPLEntryBin = ModifyPHSegmentOffset64(UPLEntryBin, ElfHeaderOffset, PHSegmentName)
|
|---|
| 685 | # Modify offsets and address of program header table in elf.
|
|---|
| 686 | PHSegmentName = '.dynamic'
|
|---|
| 687 | _, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, _ = FindSection(UPLEntryBin, PHSegmentName)
|
|---|
| 688 | UPLEntryBin = ModifyPHSegmentOffset64(UPLEntryBin, ElfHeaderOffset, PHSegmentName)
|
|---|
| 689 | # Modify offsets and address of program header table in elf.
|
|---|
| 690 | PHSegmentName = '.data'
|
|---|
| 691 | _, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, _ = FindSection(UPLEntryBin, PHSegmentName)
|
|---|
| 692 | UPLEntryBin = ModifyPHSegmentOffset64(UPLEntryBin, ElfHeaderOffset, PHSegmentName)
|
|---|
| 693 | fFileBinary.close()
|
|---|
| 694 | return UPLEntryBin
|
|---|
| 695 |
|
|---|
| 696 | def AddSection32(UniversalPayloadEntry, AddSectionName, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, StringIndexNumber, FileBinary, Alignment):
|
|---|
| 697 | with open(UniversalPayloadEntry,'rb+') as f:
|
|---|
| 698 | # Read Elf and binary which will be write to elf.
|
|---|
| 699 | UPLEntry = f.read()
|
|---|
| 700 | fFileBinary = open(FileBinary, 'rb')
|
|---|
| 701 | Binary_File = fFileBinary.read()
|
|---|
| 702 | ElfHeaderOffset, SectionHeaderEntryNumber, StringIndexNumber, _, _, SectionHeaderEntrySize, _, _ = ElfHeaderParser(UPLEntry)
|
|---|
| 703 | # Read section header entry
|
|---|
| 704 | SHentry = UPLEntry[ElfHeaderOffset:]
|
|---|
| 705 | # Elf header is recombined.
|
|---|
| 706 | # Elf header and program header table in front of first section are reserved.
|
|---|
| 707 | # Elf header is stored at 0x0-0x34 in 32-bits objects
|
|---|
| 708 | elf_header = ElfHeader32(UPLEntry[:52])
|
|---|
| 709 | # Elf header size is 0x34 with 32-bit object.
|
|---|
| 710 | ElfHeaderSize = 52
|
|---|
| 711 | ElfHandPH = ElfHeaderSize + (elf_header.e_phnum * elf_header.e_phentsize)
|
|---|
| 712 | NewUPLEntry = UPLEntry[:ElfHandPH]
|
|---|
| 713 | # Keep Section header and program header table, AddSection32() only recombined section and section header.
|
|---|
| 714 | NewUPLEntry = bytearray(NewUPLEntry)
|
|---|
| 715 | # Sections is recombined.
|
|---|
| 716 | # 1. name of added section is added in name string section.
|
|---|
| 717 | # 2. added section is added in dll file.
|
|---|
| 718 | # 3. re-align sections before and after added section.
|
|---|
| 719 | NewUPLEntrylen = []
|
|---|
| 720 | StringIndexValue = 0
|
|---|
| 721 | for Index in range(0, SectionHeaderEntryNumber):
|
|---|
| 722 | NewUPLEntrylen.append(len(NewUPLEntry))
|
|---|
| 723 | unpacked_SectionHeader = ElfSectionHeader32.unpack(SHentry[(Index * SectionHeaderEntrySize):((Index * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 724 | # Sections is recombined.
|
|---|
| 725 | if (Index == 0):
|
|---|
| 726 | # Address alignment, section will align with alignment of next section.
|
|---|
| 727 | AlignmentIndex = 8
|
|---|
| 728 | if (SectionHeaderEntryNumber > 2):
|
|---|
| 729 | unpacked_NextSectionHeader = ElfSectionHeader32.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 730 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 731 | # Section is last one.
|
|---|
| 732 | elif (Index == (SectionHeaderEntryNumber - 1)):
|
|---|
| 733 | # Add new section at the end.
|
|---|
| 734 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 735 | NewUPLEntry = SectionAlignment(NewUPLEntry, Alignment)
|
|---|
| 736 | LastUPLEntrylen = len(NewUPLEntry)
|
|---|
| 737 | NewUPLEntry += Binary_File
|
|---|
| 738 | # Address alignment, section will align with alignment of next section.
|
|---|
| 739 | AlignmentIndex = 8
|
|---|
| 740 | NewUPLEntry = SectionAlignment(NewUPLEntry, AlignmentIndex)
|
|---|
| 741 | # section is name string section.
|
|---|
| 742 | elif (Index == StringIndexNumber):
|
|---|
| 743 | # StringIndex is String Index section
|
|---|
| 744 | StringIndex = UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 745 | # Read name of added Section after StringIndex is transform into string.
|
|---|
| 746 | StringIndex = bytearray(StringIndex)
|
|---|
| 747 | StringIndexValue = len(StringIndex)
|
|---|
| 748 | AddSectionName = bytearray(AddSectionName, encoding='utf-8') + bytes('\0', encoding='utf-8')
|
|---|
| 749 | StringIndex += AddSectionName
|
|---|
| 750 | NewUPLEntry += StringIndex
|
|---|
| 751 | # section after name string section but not last one.
|
|---|
| 752 | elif ((Index > StringIndexNumber) and (Index < (SectionHeaderEntryNumber - 1))):
|
|---|
| 753 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 754 | # Address alignment, section will align with alignment of next section.
|
|---|
| 755 | unpacked_NextSectionHeader = ElfSectionHeader32.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 756 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 757 | # Section before name string section.
|
|---|
| 758 | else:
|
|---|
| 759 | NewUPLEntry += UPLEntry[unpacked_SectionHeader.sh_offset:(unpacked_SectionHeader.sh_offset + unpacked_SectionHeader.sh_size)]
|
|---|
| 760 | # Address alignment, section will align with alignment of next section.
|
|---|
| 761 | if (Index < (SectionHeaderEntryNumber - 1)):
|
|---|
| 762 | unpacked_NextSectionHeader = ElfSectionHeader32.unpack(SHentry[((Index + 1) * SectionHeaderEntrySize):(((Index + 1) * SectionHeaderEntrySize) + SectionHeaderEntrySize)])
|
|---|
| 763 | NewUPLEntry = SectionAlignment(NewUPLEntry, unpacked_NextSectionHeader.sh_addralign)
|
|---|
| 764 | SectionHeaderOffset = len(NewUPLEntry)
|
|---|
| 765 | RemoveNameOffset = 0
|
|---|
| 766 | # Add section header
|
|---|
| 767 | for Number in range(0, (SectionHeaderEntryNumber)):
|
|---|
| 768 | NewSHentry = AddSectionHeader32(SHentry, NewUPLEntrylen[Number], SectionHeaderEntrySize, Number, RemoveNameOffset, AddSectionName, StringIndexNumber)
|
|---|
| 769 | NewUPLEntry += NewSHentry
|
|---|
| 770 | NewUPLEntry += bytearray(AddNewSectionEntry32(LastUPLEntrylen, StringIndexValue, len(Binary_File), Alignment))
|
|---|
| 771 | # Modify number of sections and offset of section header in Elf header.
|
|---|
| 772 | # Modify offset in in Elf header.
|
|---|
| 773 | elf_header.e_shoff = SectionHeaderOffset
|
|---|
| 774 | elf_header.e_shnum += 1
|
|---|
| 775 | PHTableSize = elf_header.e_phentsize
|
|---|
| 776 | elf_header = elf_header.pack()
|
|---|
| 777 | UPLEntryBin = elf_header + NewUPLEntry[52:]
|
|---|
| 778 | # Modify offsets and address of program header table in elf.
|
|---|
| 779 | PHSegmentName = '.text'
|
|---|
| 780 | _, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, _ = FindSection(UPLEntryBin, PHSegmentName)
|
|---|
| 781 | UPLEntryBin = ModifyPHSegmentOffset32(UPLEntryBin, ElfHeaderOffset, PHSegmentName)
|
|---|
| 782 | # Modify offsets and address of program header table in elf. Its are stored at 0x08-0x0F and 0x10-0x17
|
|---|
| 783 | PHSegmentName = '.data'
|
|---|
| 784 | _, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, _ = FindSection(UPLEntryBin, PHSegmentName)
|
|---|
| 785 | UPLEntryBin = ModifyPHSegmentOffset32(UPLEntryBin, ElfHeaderOffset, PHSegmentName)
|
|---|
| 786 | fFileBinary.close()
|
|---|
| 787 | return UPLEntryBin
|
|---|
| 788 |
|
|---|
| 789 | def ReplaceFv (UniversalPayloadEntry, FileBinary, AddSectionName, Alignment = 16):
|
|---|
| 790 | with open(UniversalPayloadEntry,'rb+') as f:
|
|---|
| 791 | UPLEntry = f.read()
|
|---|
| 792 | SectionNameOffset, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, _, StringIndexNumber, EI_CLASS = FindSection(UPLEntry, AddSectionName)
|
|---|
| 793 | # If elf is 64-bit objects.
|
|---|
| 794 | if (EI_CLASS == 2):
|
|---|
| 795 | # Remove section if it exists.
|
|---|
| 796 | if (SectionNameOffset != -1):
|
|---|
| 797 | RemoveSection64(UniversalPayloadEntry, AddSectionName)
|
|---|
| 798 | # Add section.
|
|---|
| 799 | NewUPLEntry = AddSection64(UniversalPayloadEntry, AddSectionName, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, StringIndexNumber, FileBinary, Alignment)
|
|---|
| 800 | # If elf is 32-bit objects.
|
|---|
| 801 | else:
|
|---|
| 802 | # Remove section if it exists.
|
|---|
| 803 | if (SectionNameOffset != -1):
|
|---|
| 804 | RemoveSection32(UniversalPayloadEntry, AddSectionName)
|
|---|
| 805 | # Add section.
|
|---|
| 806 | NewUPLEntry = AddSection32(UniversalPayloadEntry, AddSectionName, ElfHeaderOffset, SectionHeaderEntrySize, SectionHeaderEntryNumber, StringIndexNumber, FileBinary, Alignment)
|
|---|
| 807 | with open(UniversalPayloadEntry,'wb') as f:
|
|---|
| 808 | f.write(NewUPLEntry)
|
|---|
| 809 | return 0
|
|---|
