Loading...
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 | /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2009-2012 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <stdio.h> #include <unistd.h> #include <sys/stat.h> #include <string.h> #include <dlfcn.h> #include <fcntl.h> #include <stdlib.h> #include <errno.h> #include <sys/mman.h> #include <sys/syslimits.h> #include <mach-o/arch.h> #include <mach-o/loader.h> #include <mach-o/dyld.h> #include <mach-o/dyld_priv.h> #include <mach/mach.h> #include <map> #include <vector> #include "DyldSharedCache.h" #include "dsc_iterator.h" #include "dsc_extractor.h" #include "dyld_cache_format.h" #include "Architectures.hpp" #include "MachOFileAbstraction.hpp" #include "CacheFileAbstraction.hpp" #include "Trie.hpp" #include "SupportedArchs.h" enum Mode { modeNone, modeList, modeMap, modeDependencies, modeSlideInfo, modeVerboseSlideInfo, modeAcceleratorInfo, modeTextInfo, modeLinkEdit, modeLocalSymbols, modeStrings, modeInfo, modeSize, modeExtract }; struct Options { Mode mode; const char* dependentsOfPath; const void* mappedCache; const char* extractionDir; bool printUUIDs; bool printVMAddrs; bool printDylibVersions; bool printInodes; }; struct TextInfo { uint64_t textSize; const char* path; }; struct TextInfoSorter { bool operator()(const TextInfo& left, const TextInfo& right) { return (left.textSize > right.textSize); } }; struct Results { std::map<uint32_t, const char*> pageToContent; uint64_t linkeditBase; bool dependentTargetFound; std::vector<TextInfo> textSegments; }; // mmap() an shared cache file read/only but laid out like it would be at runtime static const DyldSharedCache* mapCacheFile(const char* path, size_t& cacheLength) { struct stat statbuf; if ( ::stat(path, &statbuf) ) { fprintf(stderr, "Error: stat failed for dyld shared cache at %s\n", path); return nullptr; } int cache_fd = ::open(path, O_RDONLY); if (cache_fd < 0) { fprintf(stderr, "Error: failed to open shared cache file at %s\n", path); return nullptr; } uint8_t firstPage[4096]; if ( ::pread(cache_fd, firstPage, 4096, 0) != 4096 ) { fprintf(stderr, "Error: failed to read shared cache file at %s\n", path); return nullptr; } const dyld_cache_header* header = (dyld_cache_header*)firstPage; const dyld_cache_mapping_info* mappings = (dyld_cache_mapping_info*)(firstPage + header->mappingOffset); size_t vmSize = (size_t)(mappings[2].address + mappings[2].size - mappings[0].address); vm_address_t result; kern_return_t r = ::vm_allocate(mach_task_self(), &result, vmSize, VM_FLAGS_ANYWHERE); if ( r != KERN_SUCCESS ) { fprintf(stderr, "Error: failed to allocate space to load shared cache file at %s\n", path); return nullptr; } for (int i=0; i < 3; ++i) { void* mapped_cache = ::mmap((void*)(result + mappings[i].address - mappings[0].address), (size_t)mappings[i].size, PROT_READ, MAP_FIXED | MAP_PRIVATE, cache_fd, mappings[i].fileOffset); if (mapped_cache == MAP_FAILED) { fprintf(stderr, "Error: mmap() for shared cache at %s failed, errno=%d\n", path, errno); return nullptr; } } ::close(cache_fd); cacheLength = statbuf.st_size; return (DyldSharedCache*)result; } void usage() { fprintf(stderr, "Usage: dyld_shared_cache_util -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit | -map | -slide_info | -verbose_slide_info | -info | -extract <dylib-dir> [ shared-cache-file ] \n"); } #if __x86_64__ static bool isHaswell() { // check system is capable of running x86_64h code struct host_basic_info info; mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT; mach_port_t hostPort = mach_host_self(); kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count); mach_port_deallocate(mach_task_self(), hostPort); if ( result != KERN_SUCCESS ) return false; return ( info.cpu_subtype == CPU_SUBTYPE_X86_64_H ); } #endif /* * Get the path to the native shared cache for this host */ static const char* default_shared_cache_path() { #if __i386__ return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "i386"; #elif __x86_64__ if ( isHaswell() ) return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64h"; else return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64"; #elif __ARM_ARCH_5TEJ__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv5"; #elif __ARM_ARCH_6K__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv6"; #elif __ARM_ARCH_7K__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7k"; #elif __ARM_ARCH_7A__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7"; #elif __ARM_ARCH_7F__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7f"; #elif __ARM_ARCH_7S__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7s"; #elif __ARM64_ARCH_8_32__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64_32"; #elif __arm64e__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64e"; #elif __arm64__ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64"; #else #error unsupported architecture #endif } typedef void (*segment_callback_t)(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results); /* * List dependencies from the mach-o header at headerAddr * in the same format as 'otool -L' */ template <typename A> void print_dependencies(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) { typedef typename A::P P; typedef typename A::P::E E; if ( strcmp(options.dependentsOfPath, dylibInfo->path) != 0 ) return; if ( strcmp(segInfo->name, "__TEXT") != 0 ) return; const macho_dylib_command<P>* dylib_cmd; const macho_header<P>* mh = (const macho_header<P>*)dylibInfo->machHeader; const macho_load_command<P>* const cmds = (macho_load_command<P>*)((uintptr_t)dylibInfo->machHeader + sizeof(macho_header<P>)); const uint32_t cmd_count = mh->ncmds(); const macho_load_command<P>* cmd = cmds; for (uint32_t i = 0; i < cmd_count; ++i) { switch ( cmd->cmd() ) { case LC_LOAD_DYLIB: case LC_ID_DYLIB: case LC_REEXPORT_DYLIB: case LC_LOAD_WEAK_DYLIB: case LC_LOAD_UPWARD_DYLIB: dylib_cmd = (macho_dylib_command<P>*)cmd; if ( options.printDylibVersions ) { uint32_t compat_vers = dylib_cmd->compatibility_version(); uint32_t current_vers = dylib_cmd->current_version(); printf("\t%s", dylib_cmd->name()); if ( compat_vers != 0xFFFFFFFF ) { printf("(compatibility version %u.%u.%u, current version %u.%u.%u)\n", (compat_vers >> 16), (compat_vers >> 8) & 0xff, (compat_vers) & 0xff, (current_vers >> 16), (current_vers >> 8) & 0xff, (current_vers) & 0xff); } else { printf("\n"); } } else { printf("\t%s\n", dylib_cmd->name()); } break; } cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize()); } results.dependentTargetFound = true; } /* * Print out a dylib from the shared cache, optionally including the UUID or unslid load address */ template <typename A> void print_list(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) { if ( strcmp(segInfo->name, "__TEXT") != 0 ) return; if ( options.printVMAddrs ) printf("0x%08llX ", segInfo->address); if ( options.printInodes ) printf("0x%08llX 0x%08llX ", dylibInfo->inode, dylibInfo->modTime); if ( options.printUUIDs ) { if ( dylibInfo->uuid != NULL ) { const uint8_t* uuid = (uint8_t*)dylibInfo->uuid;; printf("<%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X> ", uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14], uuid[15]); } else printf("< no uuid in dylib > "); } if ( dylibInfo->isAlias ) printf("[alias] %s\n", dylibInfo->path); else printf("%s\n", dylibInfo->path); } template <typename A> void collect_size(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) { if ( strcmp(segInfo->name, "__TEXT") != 0 ) return; if ( dylibInfo->isAlias ) return; TextInfo info; info.textSize = segInfo->fileSize; info.path = dylibInfo->path; results.textSegments.push_back(info); } static void add_linkedit(uint32_t pageStart, uint32_t pageEnd, const char* message, Results& results) { for (uint32_t p = pageStart; p <= pageEnd; p += 4096) { std::map<uint32_t, const char*>::iterator pos = results.pageToContent.find(p); if ( pos == results.pageToContent.end() ) { results.pageToContent[p] = strdup(message); } else { const char* oldMessage = pos->second; char* newMesssage; asprintf(&newMesssage, "%s, %s", oldMessage, message); results.pageToContent[p] = newMesssage; ::free((void*)oldMessage); } } } /* * get LINKEDIT info for dylib */ template <typename A> void process_linkedit(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) { typedef typename A::P P; typedef typename A::P::E E; // filter out symlinks if ( dylibInfo->isAlias ) return; const macho_header<P>* mh = (const macho_header<P>*)dylibInfo->machHeader; uint32_t ncmds = mh->ncmds(); const macho_load_command<P>* const cmds = (macho_load_command<P>*)((long)mh + sizeof(macho_header<P>)); const macho_load_command<P>* cmd = cmds; for (uint32_t i = 0; i < ncmds; i++) { if ( cmd->cmd() == LC_DYLD_INFO_ONLY ) { macho_dyld_info_command<P>* dyldInfo = (macho_dyld_info_command<P>*)cmd; char message[1000]; const char* shortName = strrchr(dylibInfo->path, '/') + 1; // add export trie info if ( dyldInfo->export_size() != 0 ) { //printf("export_off=0x%X\n", dyldInfo->export_off()); uint32_t exportPageOffsetStart = dyldInfo->export_off() & (-4096); uint32_t exportPageOffsetEnd = (dyldInfo->export_off() + dyldInfo->export_size()) & (-4096); sprintf(message, "exports from %s", shortName); add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message, results); } // add binding info if ( dyldInfo->bind_size() != 0 ) { uint32_t bindPageOffsetStart = dyldInfo->bind_off() & (-4096); uint32_t bindPageOffsetEnd = (dyldInfo->bind_off() + dyldInfo->bind_size()) & (-4096); sprintf(message, "bindings from %s", shortName); add_linkedit(bindPageOffsetStart, bindPageOffsetEnd, message, results); } // add lazy binding info if ( dyldInfo->lazy_bind_size() != 0 ) { uint32_t lazybindPageOffsetStart = dyldInfo->lazy_bind_off() & (-4096); uint32_t lazybindPageOffsetEnd = (dyldInfo->lazy_bind_off() + dyldInfo->lazy_bind_size()) & (-4096); sprintf(message, "lazy bindings from %s", shortName); add_linkedit(lazybindPageOffsetStart, lazybindPageOffsetEnd, message, results); } // add weak binding info if ( dyldInfo->weak_bind_size() != 0 ) { uint32_t weakbindPageOffsetStart = dyldInfo->weak_bind_off() & (-4096); uint32_t weakbindPageOffsetEnd = (dyldInfo->weak_bind_off() + dyldInfo->weak_bind_size()) & (-4096); sprintf(message, "weak bindings from %s", shortName); add_linkedit(weakbindPageOffsetStart, weakbindPageOffsetEnd, message, results); } } cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize()); } } /* * Print out a .map file similar to what update_dyld_shared_cache created when the cache file was built */ template <typename A> void print_map(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) { if ( !dylibInfo->isAlias ) printf("0x%08llX - 0x%08llX %s %s\n", segInfo->address, segInfo->address + segInfo->fileSize, segInfo->name, dylibInfo->path); } static void checkMode(Mode mode) { if ( mode != modeNone ) { fprintf(stderr, "Error: select one of: -list, -dependents, -info, -slide_info, -verbose_slide_info, -linkedit, -map, -extract, or -size\n"); usage(); exit(1); } } int main (int argc, const char* argv[]) { const char* sharedCachePath = default_shared_cache_path(); Options options; options.mode = modeNone; options.printUUIDs = false; options.printVMAddrs = false; options.printDylibVersions = false; options.printInodes = false; options.dependentsOfPath = NULL; options.extractionDir = NULL; bool printStrings = false; bool printExports = false; for (uint32_t i = 1; i < argc; i++) { const char* opt = argv[i]; if (opt[0] == '-') { if (strcmp(opt, "-list") == 0) { checkMode(options.mode); options.mode = modeList; } else if (strcmp(opt, "-dependents") == 0) { checkMode(options.mode); options.mode = modeDependencies; options.dependentsOfPath = argv[++i]; if ( i >= argc ) { fprintf(stderr, "Error: option -depdendents requires an argument\n"); usage(); exit(1); } } else if (strcmp(opt, "-linkedit") == 0) { checkMode(options.mode); options.mode = modeLinkEdit; } else if (strcmp(opt, "-info") == 0) { checkMode(options.mode); options.mode = modeInfo; } else if (strcmp(opt, "-slide_info") == 0) { checkMode(options.mode); options.mode = modeSlideInfo; } else if (strcmp(opt, "-verbose_slide_info") == 0) { checkMode(options.mode); options.mode = modeVerboseSlideInfo; } else if (strcmp(opt, "-accelerator_info") == 0) { checkMode(options.mode); options.mode = modeAcceleratorInfo; } else if (strcmp(opt, "-text_info") == 0) { checkMode(options.mode); options.mode = modeTextInfo; } else if (strcmp(opt, "-local_symbols") == 0) { checkMode(options.mode); options.mode = modeLocalSymbols; } else if (strcmp(opt, "-strings") == 0) { if (options.mode != modeStrings) checkMode(options.mode); options.mode = modeStrings; printStrings = true; } else if (strcmp(opt, "-exports") == 0) { if (options.mode != modeStrings) checkMode(options.mode); options.mode = modeStrings; printExports = true; } else if (strcmp(opt, "-map") == 0) { checkMode(options.mode); options.mode = modeMap; } else if (strcmp(opt, "-size") == 0) { checkMode(options.mode); options.mode = modeSize; } else if (strcmp(opt, "-extract") == 0) { checkMode(options.mode); options.mode = modeExtract; options.extractionDir = argv[++i]; if ( i >= argc ) { fprintf(stderr, "Error: option -extract requires a directory argument\n"); usage(); exit(1); } } else if (strcmp(opt, "-uuid") == 0) { options.printUUIDs = true; } else if (strcmp(opt, "-inode") == 0) { options.printInodes = true; } else if (strcmp(opt, "-versions") == 0) { options.printDylibVersions = true; } else if (strcmp(opt, "-vmaddr") == 0) { options.printVMAddrs = true; } else { fprintf(stderr, "Error: unrecognized option %s\n", opt); usage(); exit(1); } } else { sharedCachePath = opt; } } if ( options.mode == modeNone ) { fprintf(stderr, "Error: select one of -list, -dependents, -info, -linkedit, or -map\n"); usage(); exit(1); } if ( options.mode != modeSlideInfo && options.mode != modeVerboseSlideInfo ) { if ( options.printUUIDs && (options.mode != modeList) ) fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n"); if ( options.printVMAddrs && (options.mode != modeList) ) fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n"); if ( options.printDylibVersions && (options.mode != modeDependencies) ) fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n"); if ( (options.mode == modeDependencies) && (options.dependentsOfPath == NULL) ) { fprintf(stderr, "Error: -dependents given, but no dylib path specified\n"); usage(); exit(1); } } const DyldSharedCache* dyldCache = nullptr; bool dyldCacheIsLive = true; size_t cacheLength = 0; if ( sharedCachePath != nullptr ) { dyldCache = mapCacheFile(sharedCachePath, cacheLength); dyldCacheIsLive = false; } else { #if __MAC_OS_X_VERSION_MIN_REQUIRED && (__MAC_OS_X_VERSION_MIN_REQUIRED < 101300) fprintf(stderr, "this tool needs to run on macOS 10.13 or later\n"); return 1; #else dyldCache = (DyldSharedCache*)_dyld_get_shared_cache_range(&cacheLength); #endif } options.mappedCache = dyldCache; if ( options.mode == modeSlideInfo || options.mode == modeVerboseSlideInfo ) { const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; if ( header->slideInfoOffset() == 0 ) { fprintf(stderr, "Error: dyld shared cache does not contain slide info\n"); exit(1); } const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset()); const dyldCacheFileMapping<LittleEndian>* textMapping = &mappings[0]; const dyldCacheFileMapping<LittleEndian>* dataMapping = &mappings[1]; const dyldCacheFileMapping<LittleEndian>* linkEditMapping = &mappings[2]; uint64_t dataStartAddress = dataMapping->address(); uint64_t dataSize = dataMapping->size(); uint64_t slideInfoMappedOffset = (header->slideInfoOffset()-linkEditMapping->file_offset()) + (linkEditMapping->address() - textMapping->address()); const dyldCacheSlideInfo<LittleEndian>* slideInfoHeader = (dyldCacheSlideInfo<LittleEndian>*)((char*)options.mappedCache+slideInfoMappedOffset); printf("slide info version=%d\n", slideInfoHeader->version()); if ( slideInfoHeader->version() == 1 ) { printf("toc_count=%d, data page count=%lld\n", slideInfoHeader->toc_count(), dataSize/4096); const dyldCacheSlideInfoEntry* entries = (dyldCacheSlideInfoEntry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset()); for(int i=0; i < slideInfoHeader->toc_count(); ++i) { printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, slideInfoHeader->toc(i)); const dyldCacheSlideInfoEntry* entry = &entries[slideInfoHeader->toc(i)]; for(int j=0; j < slideInfoHeader->entries_size(); ++j) printf("%02X", entry->bits[j]); printf("\n"); } } else if ( slideInfoHeader->version() == 2 ) { const dyldCacheSlideInfo2<LittleEndian>* slideInfo = (dyldCacheSlideInfo2<LittleEndian>*)(slideInfoHeader); printf("page_size=%d\n", slideInfo->page_size()); printf("delta_mask=0x%016llX\n", slideInfo->delta_mask()); printf("value_add=0x%016llX\n", slideInfo->value_add()); printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count(), slideInfo->page_extras_count()); const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset()); const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset()); for (int i=0; i < slideInfo->page_starts_count(); ++i) { const uint16_t start = starts[i]; auto rebaseChain = [&](uint8_t* pageContent, uint16_t startOffset) { uintptr_t slideAmount = 0; const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask()); const uintptr_t valueMask = ~deltaMask; const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add()); const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2; uint32_t pageOffset = startOffset; uint32_t delta = 1; while ( delta != 0 ) { uint8_t* loc = pageContent + pageOffset; uintptr_t rawValue = *((uintptr_t*)loc); delta = (uint32_t)((rawValue & deltaMask) >> deltaShift); uintptr_t value = (rawValue & valueMask); if ( value != 0 ) { value += valueAdd; value += slideAmount; } printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)(pageOffset), (uint64_t)rawValue); pageOffset += delta; } }; const uint8_t* dataPagesStart = (uint8_t*)((char*)options.mappedCache + dataMapping->file_offset()); if ( start == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE ) { printf("page[% 5d]: no rebasing\n", i); } else if ( start & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) { printf("page[% 5d]: ", i); int j=(start & 0x3FFF); bool done = false; do { uint16_t aStart = extras[j]; printf("start=0x%04X ", aStart & 0x3FFF); if ( options.mode == modeVerboseSlideInfo ) { uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size()*i)); uint16_t pageStartOffset = (aStart & 0x3FFF)*4; rebaseChain(page, pageStartOffset); } done = (extras[j] & DYLD_CACHE_SLIDE_PAGE_ATTR_END); ++j; } while ( !done ); printf("\n"); } else { printf("page[% 5d]: start=0x%04X\n", i, starts[i]); if ( options.mode == modeVerboseSlideInfo ) { uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size()*i)); uint16_t pageStartOffset = start*4; rebaseChain(page, pageStartOffset); } } } } else if ( slideInfoHeader->version() == 3 ) { const dyldCacheSlideInfo3<LittleEndian>* slideInfo = (dyldCacheSlideInfo3<LittleEndian>*)(slideInfoHeader); printf("page_size=%d\n", slideInfo->page_size()); printf("page_starts_count=%d\n", slideInfo->page_starts_count()); printf("auth_value_add=0x%016llX\n", slideInfo->auth_value_add()); const uint8_t* dataSegmentStart = (uint8_t*)((char*)options.mappedCache + dataMapping->file_offset()); for (int i=0; i < slideInfo->page_starts_count(); ++i) { const uint16_t start = slideInfo->page_starts(i); if ( start == 0xFFFF ) { printf("page[% 5d]: no rebasing\n", i); } else { printf("page[% 5d]: start=0x%04X\n", i, start); if ( options.mode == modeVerboseSlideInfo ) { typedef Pointer64<LittleEndian> P; typedef typename P::uint_t pint_t; const uint8_t* pageStart = dataSegmentStart + (i * slideInfo->page_size()); pint_t delta = start; const uint8_t* rebaseLocation = pageStart; do { rebaseLocation += delta; pint_t value = (pint_t)P::getP(*(uint64_t*)rebaseLocation); delta = ( (value & 0x3FF8000000000000) >> 51) * sizeof(pint_t); // Regular pointer which needs to fit in 51-bits of value. // C++ RTTI uses the top bit, so we'll allow the whole top-byte // and the signed-extended bottom 43-bits to be fit in to 51-bits. uint64_t top8Bits = value & 0x007F80000000000ULL; uint64_t bottom43Bits = value & 0x000007FFFFFFFFFFULL; uint64_t targetValue = ( top8Bits << 13 ) | (((intptr_t)(bottom43Bits << 21) >> 21) & 0x00FFFFFFFFFFFFFF); printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)(rebaseLocation - pageStart), targetValue); } while (delta != 0); } } } } else if ( slideInfoHeader->version() == 4 ) { const dyld_cache_slide_info4* slideInfo = (dyld_cache_slide_info4*)(slideInfoHeader); printf("page_size=%d\n", slideInfo->page_size); printf("delta_mask=0x%016llX\n", slideInfo->delta_mask); printf("value_add=0x%016llX\n", slideInfo->value_add); printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count, slideInfo->page_extras_count); const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset); const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset); for (int i=0; i < slideInfo->page_starts_count; ++i) { const uint16_t start = starts[i]; auto rebaseChainV4 = [&](uint8_t* pageContent, uint16_t startOffset) { uintptr_t slideAmount = 0; const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask); const uintptr_t valueMask = ~deltaMask; const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add); const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2; uint32_t pageOffset = startOffset; uint32_t delta = 1; while ( delta != 0 ) { uint8_t* loc = pageContent + pageOffset; uint32_t rawValue = *((uint32_t*)loc); delta = (uint32_t)((rawValue & deltaMask) >> deltaShift); uintptr_t value = (rawValue & valueMask); if ( (value & 0xFFFF8000) == 0 ) { // small positive non-pointer, use as-is } else if ( (value & 0x3FFF8000) == 0x3FFF8000 ) { // small negative non-pointer value |= 0xC0000000; } else { value += valueAdd; value += slideAmount; } printf(" [% 5d + 0x%04X]: 0x%08X\n", i, pageOffset, rawValue); pageOffset += delta; } }; const uint8_t* dataPagesStart = (uint8_t*)((char*)options.mappedCache + dataMapping->file_offset()); if ( start == DYLD_CACHE_SLIDE4_PAGE_NO_REBASE ) { printf("page[% 5d]: no rebasing\n", i); } else if ( start & DYLD_CACHE_SLIDE4_PAGE_USE_EXTRA ) { printf("page[% 5d]: ", i); int j=(start & DYLD_CACHE_SLIDE4_PAGE_INDEX); bool done = false; do { uint16_t aStart = extras[j]; printf("start=0x%04X ", aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX); if ( options.mode == modeVerboseSlideInfo ) { uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i)); uint16_t pageStartOffset = (aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX)*4; rebaseChainV4(page, pageStartOffset); } done = (extras[j] & DYLD_CACHE_SLIDE4_PAGE_EXTRA_END); ++j; } while ( !done ); printf("\n"); } else { printf("page[% 5d]: start=0x%04X\n", i, starts[i]); if ( options.mode == modeVerboseSlideInfo ) { uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i)); uint16_t pageStartOffset = start*4; rebaseChainV4(page, pageStartOffset); } } } } return 0; } if ( options.mode == modeInfo ) { const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; printf("uuid: "); if ( header->mappingOffset() >= 0x68 ) { const uint8_t* uuid = header->uuid(); printf("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n", uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14], uuid[15]); } else { printf("n/a\n"); } if ( header->mappingOffset() >= 0xE0 ) { // HACK until this uses new header uint32_t platform = *((uint32_t*)(((char*)header) + 0xD8)); uint32_t bitfield = *((uint32_t*)(((char*)header) + 0xDC)); uint32_t simulator = bitfield & 0x200; uint32_t locallyBuiltCache = bitfield & 0x400; switch (platform) { case 1: printf("platform: macOS\n"); break; case 2: if ( simulator ) printf("platform: iOS simulator\n"); else printf("platform: iOS\n"); break; case 3: if ( simulator ) printf("platform: tvOS simulator\n"); else printf("platform: tvOS\n"); break; case 4: if ( simulator ) printf("platform: watchOS simulator\n"); else printf("platform: watchOS\n"); break; case 5: printf("platform: bridgeOS\n"); break; default: printf("platform: 0x%08X 0x%08X\n", platform, simulator); } printf("built by: %s\n", locallyBuiltCache ? "local machine" : "B&I"); } printf("image count: %u\n", header->imagesCount()); if ( (header->mappingOffset() >= 0x78) && (header->branchPoolsOffset() != 0) ) { printf("branch pool count: %u\n", header->branchPoolsCount()); } printf("mappings:\n"); const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset()); for (uint32_t i=0; i < header->mappingCount(); ++i) { if ( mappings[i].init_prot() & VM_PROT_EXECUTE ) printf(" __TEXT %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n", mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(), mappings[i].address(), mappings[i].address() + mappings[i].size()); else if ( mappings[i]. init_prot() & VM_PROT_WRITE ) printf(" __DATA %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n", mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(), mappings[i].address(), mappings[i].address() + mappings[i].size()); else if ( mappings[i].init_prot() & VM_PROT_READ ) printf(" __LINKEDIT %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n", mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(), mappings[i].address(), mappings[i].address() + mappings[i].size()); } if ( header->codeSignatureOffset() != 0 ) { uint64_t size = cacheLength - header->codeSignatureOffset(); uint64_t csAddr = mappings[header->mappingCount()-1].address() + mappings[header->mappingCount()-1].size(); if ( size != 0 ) printf(" code sign %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n", size/(1024*1024), header->codeSignatureOffset(), header->codeSignatureOffset() + size, csAddr, csAddr + size); } printf("slide info: %4lluKB, file offset: 0x%08llX -> 0x%08llX\n", header->slideInfoSize()/1024, header->slideInfoOffset(), header->slideInfoOffset() + header->slideInfoSize()); if ( header->localSymbolsOffset() != 0 ) printf("local symbols: %3lluMB, file offset: 0x%08llX -> 0x%08llX\n", header->localSymbolsSize()/(1024*1024), header->localSymbolsOffset(), header->localSymbolsOffset() + header->localSymbolsSize()); if ( (header->mappingOffset() >= 0x78) && (header->accelerateInfoSize() != 0) ) printf("accelerate tab: %3lluKB, address: 0x%08llX -> 0x%08llX\n", header->accelerateInfoSize()/1024, header->accelerateInfoAddr(), header->accelerateInfoAddr() + header->accelerateInfoSize()); } else if ( options.mode == modeAcceleratorInfo ) { const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; if ( (header->mappingOffset() < sizeof(dyldCacheHeader<LittleEndian>)) || (header->accelerateInfoSize() == 0) ) { printf("no accelerator info\n"); } else { const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset()); uint64_t aiAddr = header->accelerateInfoAddr(); dyldCacheAcceleratorInfo<LittleEndian>* accelInfo = NULL; for (uint32_t i=0; i < header->mappingCount(); ++i) { if ( (mappings[i].address() <= aiAddr) && (aiAddr < mappings[i].address()+mappings[i].size()) ) { uint64_t offset = aiAddr - mappings[i].address() + mappings[i].file_offset(); accelInfo = (dyldCacheAcceleratorInfo<LittleEndian>*)((uint8_t*)options.mappedCache + offset); } } if ( accelInfo == NULL ) { printf("accelerator info not in any mapped range\n"); } else { const dyldCacheImageInfo<LittleEndian>* images = (dyldCacheImageInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesOffset()); const dyldCacheImageInfoExtra<LittleEndian>* imagesExtra = (dyldCacheImageInfoExtra<LittleEndian>*)((char*)accelInfo + accelInfo->imagesExtrasOffset()); const uint16_t* dependencyArray = (uint16_t*)((char*)accelInfo + accelInfo->depListOffset()); const uint16_t* reExportArray = (uint16_t*)((char*)accelInfo + accelInfo->reExportListOffset()); printf("extra image info (count=%u):\n", accelInfo->imageExtrasCount()); for (uint32_t i=0; i < accelInfo->imageExtrasCount(); ++i) { printf(" image[%3u] %s:\n", i, (char*)options.mappedCache +images[i].pathFileOffset()); printf(" exports trie: addr=0x%llX, size=0x%08X\n", imagesExtra[i].exportsTrieAddr(), imagesExtra[i].exportsTrieSize()); if ( imagesExtra[i].weakBindingsSize() ) printf(" weak bind info: addr=0x%llX, size=0x%08X\n", imagesExtra[i].weakBindingsAddr(), imagesExtra[i].weakBindingsSize()); printf(" dependents: "); for (uint32_t d=imagesExtra[i].dependentsStartArrayIndex(); dependencyArray[d] != 0xFFFF; ++d) { uint16_t depIndex = dependencyArray[d]; if ( depIndex & 0x8000 ) printf(" up(%d) ", depIndex & 0x7FFF); else printf(" %d ", depIndex); } printf("\n"); printf(" re-exports: "); for (uint32_t r=imagesExtra[i].reExportsStartArrayIndex(); reExportArray[r] != 0xFFFF; ++r) printf(" %d ", reExportArray[r]); printf("\n"); } printf("libdyld.dylib:\n"); printf(" __dyld section address: 0x%llX\n", accelInfo->dyldSectionAddr()); printf("initializers (count=%u):\n", accelInfo->initializersCount()); const dyldCacheAcceleratorInitializer<LittleEndian>* initializers = (dyldCacheAcceleratorInitializer<LittleEndian>*)((char*)accelInfo + accelInfo->initializersOffset()); for (uint32_t i=0; i < accelInfo->initializersCount(); ++i) { printf(" image[%3u] 0x%llX\n", initializers[i].imageIndex(), mappings[0].address() + initializers[i].functionOffset()); } printf("DOF sections (count=%u):\n", accelInfo->dofSectionsCount()); const dyldCacheAcceleratorDOFEntry<LittleEndian>* dofs = (dyldCacheAcceleratorDOFEntry<LittleEndian>*)((char*)accelInfo + accelInfo->dofSectionsOffset()); for (uint32_t i=0; i < accelInfo->dofSectionsCount(); ++i) { printf(" image[%3u] 0x%llX -> 0x%llX\n", dofs[i].imageIndex(), dofs[i].sectionAddress(), dofs[i].sectionAddress()+dofs[i].sectionSize()); } printf("bottom up order (count=%u):\n", accelInfo->imageExtrasCount()); const uint16_t* bottomUpArray = (uint16_t*)((char*)accelInfo + accelInfo->bottomUpListOffset()); for (uint32_t i=0; i < accelInfo->imageExtrasCount(); ++i) { unsigned imageIndex = bottomUpArray[i]; if ( imageIndex < accelInfo->imageExtrasCount() ) printf(" image[%3u] %s\n", imageIndex, (char*)options.mappedCache + images[imageIndex].pathFileOffset()); else printf(" image[%3u] BAD INDEX\n", imageIndex); } printf("range table (count=%u):\n", accelInfo->rangeTableCount()); const dyldCacheAcceleratorRangeEntry<LittleEndian>* rangeTable = (dyldCacheAcceleratorRangeEntry<LittleEndian>*)((char*)accelInfo + accelInfo->rangeTableOffset()); for (uint32_t i=0; i < accelInfo->rangeTableCount(); ++i) { const dyldCacheAcceleratorRangeEntry<LittleEndian>& entry = rangeTable[i]; printf(" 0x%llX -> 0x%llX %s\n", entry.startAddress(), entry.startAddress() + entry.size(), (char*)options.mappedCache + images[entry.imageIndex()].pathFileOffset()); } printf("dylib trie (size=%u):\n", accelInfo->dylibTrieSize()); const uint8_t* dylibTrieStart = (uint8_t*)accelInfo + accelInfo->dylibTrieOffset(); const uint8_t* dylibTrieEnd = dylibTrieStart + accelInfo->dylibTrieSize(); std::vector<DylibIndexTrie::Entry> dylibEntries; if ( !Trie<DylibIndex>::parseTrie(dylibTrieStart, dylibTrieEnd, dylibEntries) ) printf(" malformed dylibs trie\n"); for (const DylibIndexTrie::Entry& x : dylibEntries) { printf(" image[%3u] %s\n", x.info.index, x.name.c_str()); } } } } else if ( options.mode == modeTextInfo ) { const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; if ( (header->mappingOffset() < sizeof(dyldCacheHeader<LittleEndian>)) || (header->imagesTextCount() == 0) ) { printf("no text info\n"); } else { const dyldCacheImageTextInfo<LittleEndian>* imagesText = (dyldCacheImageTextInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesTextOffset()); const dyldCacheImageTextInfo<LittleEndian>* imagesTextEnd = &imagesText[header->imagesTextCount()]; printf("dylib text infos (count=%llu):\n", header->imagesTextCount()); for (const dyldCacheImageTextInfo<LittleEndian>* p=imagesText; p < imagesTextEnd; ++p) { printf(" 0x%09llX -> 0x%09llX <", p->loadAddress(), p->loadAddress() + p->textSegmentSize()); for (int i=0; i<16; ++i) { switch (i) { case 4: case 6: case 8: case 10: printf("-"); break; } printf("%02X", p->uuid()[i]); } printf("> %s\n", (char*)options.mappedCache + p->pathOffset()); } } } else if ( options.mode == modeLocalSymbols ) { const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; if ( header->localSymbolsOffset() == 0 ) { fprintf(stderr, "Error: dyld shared cache does not contain local symbols info\n"); exit(1); } const bool is64 = (strstr((char*)options.mappedCache, "64") != NULL); const dyldCacheImageInfo<LittleEndian>* imageInfos = (dyldCacheImageInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesOffset()); const dyldCacheLocalSymbolsInfo<LittleEndian>* localsInfo = (dyldCacheLocalSymbolsInfo<LittleEndian>*)((char*)options.mappedCache + header->localSymbolsOffset()); const uint32_t nlistFileOffset = (uint32_t)(header->localSymbolsOffset() + localsInfo->nlistOffset()); const uint32_t nlistCount = localsInfo->nlistCount(); const uint32_t nlistByteSize = is64 ? nlistCount*16 : nlistCount*12; const uint32_t stringsFileOffset = (uint32_t)(header->localSymbolsOffset() + localsInfo->stringsOffset()); const uint32_t stringsSize = localsInfo->stringsSize(); const uint32_t entriesCount = localsInfo->entriesCount(); const dyldCacheLocalSymbolEntry<LittleEndian>* entries = (dyldCacheLocalSymbolEntry<LittleEndian>*)((char*)localsInfo + localsInfo->entriesOffset()); printf("local symbols nlist array: %3uMB, file offset: 0x%08X -> 0x%08X\n", nlistByteSize/(1024*1024), nlistFileOffset, nlistFileOffset+nlistByteSize); printf("local symbols string pool: %3uMB, file offset: 0x%08X -> 0x%08X\n", stringsSize/(1024*1024), stringsFileOffset, stringsFileOffset+stringsSize); printf("local symbols by dylib (count=%d):\n", entriesCount); //const char* stringPool = (char*)options.mappedCache + stringsFileOffset; for (int i=0; i < entriesCount; ++i) { const char* imageName = (char*)options.mappedCache + imageInfos[i].pathFileOffset(); printf(" nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", entries[i].nlistStartIndex(), entries[i].nlistCount(), imageName); #if 0 if ( is64 ) { const nlist_64* symTab = (nlist_64*)((char*)options.mappedCache + nlistFileOffset); for (int e=0; e < entries[i].nlistCount(); ++e) { const nlist_64* entry = &symTab[entries[i].nlistStartIndex()+e]; printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringPool[entry->n_un.n_strx]); printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value); } } #endif } } else if ( options.mode == modeStrings ) { if (printStrings) { dyldCache->forEachImage(^(const mach_header *mh, const char *installName) { const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh; int64_t slide = ma->getSlide(); ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo& info, bool malformedSectionRange, bool& stop) { if ( ( (info.sectFlags & SECTION_TYPE) == S_CSTRING_LITERALS ) ) { if ( malformedSectionRange ) { stop = true; return; } const uint8_t* content = (uint8_t*)(info.sectAddr + slide); const char* s = (char*)content; const char* end = s + info.sectSize; while ( s < end ) { printf("%s: %s\n", ma->installName(), s); while (*s != '\0' ) ++s; ++s; } } }); }); } if (printExports) { dyldCache->forEachImage(^(const mach_header *mh, const char *installName) { const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh; uint32_t exportTrieRuntimeOffset; uint32_t exportTrieSize; if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) { const uint8_t* start = (uint8_t*)mh + exportTrieRuntimeOffset; const uint8_t* end = start + exportTrieSize; std::vector<ExportInfoTrie::Entry> exports; if ( !ExportInfoTrie::parseTrie(start, end, exports) ) { return; } for (const ExportInfoTrie::Entry& entry: exports) { printf("%s: %s\n", ma->installName(), entry.name.c_str()); } } }); } } else if ( options.mode == modeExtract ) { char pathBuffer[PATH_MAX]; uint32_t bufferSize = PATH_MAX; if ( _NSGetExecutablePath(pathBuffer, &bufferSize) != 0 ) { fprintf(stderr, "Error: could not get path of program\n"); return 1; } char* last = strrchr(pathBuffer, '/'); strcpy(last+1, "../../lib/dsc_extractor.bundle"); void* handle = dlopen(pathBuffer, RTLD_LAZY); if ( handle == NULL ) { fprintf(stderr, "Error: dsc_extractor.bundle could not be loaded at %s\n", pathBuffer); return 1; } typedef int (*extractor_proc)(const char* shared_cache_file_path, const char* extraction_root_path, void (^progress)(unsigned current, unsigned total)); extractor_proc proc = (extractor_proc)dlsym(handle, "dyld_shared_cache_extract_dylibs_progress"); if ( proc == NULL ) { fprintf(stderr, "Error: dsc_extractor.bundle did not have dyld_shared_cache_extract_dylibs_progress symbol\n"); return 1; } int result = (*proc)(sharedCachePath, options.extractionDir, ^(unsigned c, unsigned total) { } ); return result; } else { segment_callback_t callback = nullptr; if ( strcmp((char*)options.mappedCache, "dyld_v1 i386") == 0 ) { switch ( options.mode ) { case modeList: callback = print_list<x86>; break; case modeMap: callback = print_map<x86>; break; case modeDependencies: callback = print_dependencies<x86>; break; case modeLinkEdit: callback = process_linkedit<x86>; break; case modeSize: callback = collect_size<x86>; break; case modeNone: case modeInfo: case modeSlideInfo: case modeVerboseSlideInfo: case modeAcceleratorInfo: case modeTextInfo: case modeLocalSymbols: case modeStrings: case modeExtract: break; } } else if ( (strcmp((char*)options.mappedCache, "dyld_v1 x86_64") == 0) || (strcmp((char*)options.mappedCache, "dyld_v1 x86_64h") == 0) ) { switch ( options.mode ) { case modeList: callback = print_list<x86_64>; break; case modeMap: callback = print_map<x86_64>; break; case modeDependencies: callback = print_dependencies<x86_64>; break; case modeLinkEdit: callback = process_linkedit<x86_64>; break; case modeSize: callback = collect_size<x86_64>; break; case modeNone: case modeInfo: case modeSlideInfo: case modeVerboseSlideInfo: case modeAcceleratorInfo: case modeTextInfo: case modeLocalSymbols: case modeStrings: case modeExtract: break; } } else if ( (strncmp((char*)options.mappedCache, "dyld_v1 armv", 14) == 0) || (strncmp((char*)options.mappedCache, "dyld_v1 armv", 13) == 0) #if SUPPORT_ARCH_arm64_32 || (strcmp((char*)options.mappedCache, "dyld_v1arm64_32") == 0) #endif ) { switch ( options.mode ) { case modeList: callback = print_list<arm>; break; case modeMap: callback = print_map<arm>; break; case modeDependencies: callback = print_dependencies<arm>; break; case modeLinkEdit: callback = process_linkedit<arm>; break; case modeSize: callback = collect_size<arm>; break; case modeNone: case modeInfo: case modeSlideInfo: case modeVerboseSlideInfo: case modeAcceleratorInfo: case modeTextInfo: case modeLocalSymbols: case modeStrings: case modeExtract: break; } } else if ( (strcmp((char*)options.mappedCache, "dyld_v1 arm64") == 0) #if SUPPORT_ARCH_arm64e || (strcmp((char*)options.mappedCache, "dyld_v1 arm64e") == 0) #endif ) { switch ( options.mode ) { case modeList: callback = print_list<arm64>; break; case modeMap: callback = print_map<arm64>; break; case modeDependencies: callback = print_dependencies<arm64>; break; case modeLinkEdit: callback = process_linkedit<arm64>; break; case modeSize: callback = collect_size<arm64>; break; case modeNone: case modeInfo: case modeSlideInfo: case modeVerboseSlideInfo: case modeAcceleratorInfo: case modeTextInfo: case modeLocalSymbols: case modeStrings: case modeExtract: break; } } #if SUPPORT_ARCH_arm64_32 else if ( (strcmp((char*)options.mappedCache, "dyld_v1arm64_32") == 0) ) { switch ( options.mode ) { case modeList: callback = print_list<arm64_32>; break; case modeMap: callback = print_map<arm64_32>; break; case modeDependencies: callback = print_dependencies<arm64_32>; break; case modeLinkEdit: callback = process_linkedit<arm64_32>; break; case modeSize: callback = collect_size<arm64_32>; break; case modeNone: case modeInfo: case modeSlideInfo: case modeVerboseSlideInfo: case modeAcceleratorInfo: case modeTextInfo: case modeLocalSymbols: case modeStrings: case modeExtract: break; } } #endif else { fprintf(stderr, "Error: unrecognized dyld shared cache magic.\n"); exit(1); } __block Results results; results.dependentTargetFound = false; int iterateResult = dyld_shared_cache_iterate(options.mappedCache, (uint32_t)cacheLength, ^(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo ) { (callback)(dylibInfo, segInfo, options, results); }); if ( iterateResult != 0 ) { fprintf(stderr, "Error: malformed shared cache file\n"); exit(1); } if ( options.mode == modeLinkEdit ) { // dump -linkedit information for (std::map<uint32_t, const char*>::iterator it = results.pageToContent.begin(); it != results.pageToContent.end(); ++it) { printf("0x%08X %s\n", it->first, it->second); } } else if ( options.mode == modeSize ) { std::sort(results.textSegments.begin(), results.textSegments.end(), TextInfoSorter()); for (std::vector<TextInfo>::iterator it = results.textSegments.begin(); it != results.textSegments.end(); ++it) { printf(" 0x%08llX %s\n", it->textSize, it->path); } } if ( (options.mode == modeDependencies) && options.dependentsOfPath && !results.dependentTargetFound) { fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", options.dependentsOfPath, sharedCachePath); exit(1); } } return 0; } |