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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | #!/usr/bin/env python # SPDX-License-Identifier: BSD-2-Clause # # Copyright (c) 2014-2017, Linaro Limited # import argparse import sys import shutil import os import struct import hashlib arch_id = {'arm32': 0, 'arm64': 1} image_id = {'pager': 0, 'paged': 1} def write_header_v1(outf, init_size, args, paged_size): magic = 0x4554504f # 'OPTE' version = 1 outf.write(struct.pack('<IBBHIIIII', magic, version, arch_id[args.arch], args.flags, init_size, args.init_load_addr_hi, args.init_load_addr_lo, args.init_mem_usage, paged_size)) def write_header_v2(outf, init_size, args, paged_size): magic = 0x4554504f # 'OPTE' version = 2 nb_images = 1 if paged_size == 0 else 2 outf.write(struct.pack('<IBBHI', magic, version, arch_id[args.arch], args.flags, nb_images)) outf.write(struct.pack('<IIII', args.init_load_addr_hi, args.init_load_addr_lo, image_id['pager'], init_size)) if nb_images == 2: outf.write( struct.pack( '<IIII', 0xffffffff, 0xffffffff, image_id['paged'], paged_size)) def append_to(outf, start_offs, in_fname, max_bytes=0xffffffff): inf = open(in_fname, 'rb') inf.seek(start_offs) while True: nbytes = min(16 * 1024, max_bytes) if nbytes == 0: break buf = inf.read(nbytes) if not buf: break outf.write(buf) max_bytes -= len(buf) inf.close() def append_hashes(outf, in_fname): page_size = 4 * 1024 inf = open(in_fname, 'rb') while True: page = inf.read(page_size) if len(page) == page_size: outf.write(hashlib.sha256(page).digest()) elif len(page) == 0: break else: print("Error: short read, got " + repr(len(page))) sys.exit(1) inf.close() def int_parse(str): return int(str, 0) def get_args(): parser = argparse.ArgumentParser() parser.add_argument('--arch', required=True, choices=arch_id.keys(), help='Architecture') parser.add_argument('--flags', type=int, default=0, help='Flags, currently none defined') parser.add_argument('--init_size', required=True, type=int_parse, help='Size of initialization part of binary') parser.add_argument('--init_load_addr_hi', type=int_parse, default=0, help='Upper 32 bits of load address of binary') parser.add_argument('--init_load_addr_lo', required=True, type=int_parse, help='Lower 32 bits of load address of binary') parser.add_argument('--init_mem_usage', required=True, type=int_parse, help='Total amount of used memory when initializing') parser.add_argument('--tee_pager_bin', required=True, help='The input tee_pager.bin') parser.add_argument('--tee_pageable_bin', required=True, help='The input tee_pageable.bin') parser.add_argument('--out', required=False, type=argparse.FileType('wb'), help='The output tee.bin') parser.add_argument('--out_header_v2', required=False, type=argparse.FileType('wb'), help='The output tee_header_v2.bin') parser.add_argument('--out_pager_v2', required=False, type=argparse.FileType('wb'), help='The output tee_pager_v2.bin') parser.add_argument('--out_pageable_v2', required=False, type=argparse.FileType('wb'), help='The output tee_pageable_v2.bin') return parser.parse_args() def main(): args = get_args() init_bin_size = args.init_size tee_pager_fname = args.tee_pager_bin tee_pageable_fname = args.tee_pageable_bin pager_input_size = os.path.getsize(tee_pager_fname) paged_input_size = os.path.getsize(tee_pageable_fname) hash_size = paged_input_size // (4 * 1024) * \ hashlib.sha256().digest_size if paged_input_size % (4 * 1024) != 0: print("Error: pageable size not a multiple of 4K:" + repr(paged_input_size)) sys.exit(1) init_size = pager_input_size + \ min(init_bin_size, paged_input_size) + \ hash_size paged_size = paged_input_size - \ min(init_bin_size, paged_input_size) if args.out is not None: outf = args.out write_header_v1(outf, init_size, args, paged_size) append_to(outf, 0, tee_pager_fname) append_to(outf, 0, tee_pageable_fname, init_bin_size) append_hashes(outf, tee_pageable_fname) append_to(outf, init_bin_size, tee_pageable_fname) outf.close() if args.out_header_v2 is not None: outf = args.out_header_v2 write_header_v2(outf, init_size, args, paged_size) outf.close() if args.out_pager_v2 is not None: outf = args.out_pager_v2 append_to(outf, 0, tee_pager_fname) append_to(outf, 0, tee_pageable_fname, init_bin_size) append_hashes(outf, tee_pageable_fname) outf.close() if args.out_pageable_v2 is not None: outf = args.out_pageable_v2 append_to(outf, init_bin_size, tee_pageable_fname) outf.close() if __name__ == "__main__": main() |