1/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- 2 * 3 * Copyright (c) 2009-2012 Apple Inc. All rights reserved. 4 * 5 * @APPLE_LICENSE_HEADER_START@ 6 * 7 * This file contains Original Code and/or Modifications of Original Code 8 * as defined in and that are subject to the Apple Public Source License 9 * Version 2.0 (the 'License'). You may not use this file except in 10 * compliance with the License. Please obtain a copy of the License at 11 * http://www.opensource.apple.com/apsl/ and read it before using this 12 * file. 13 * 14 * The Original Code and all software distributed under the License are 15 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 19 * Please see the License for the specific language governing rights and 20 * limitations under the License. 21 * 22 * @APPLE_LICENSE_HEADER_END@ 23 */ 24 25#include <stdio.h> 26#include <unistd.h> 27#include <sys/stat.h> 28#include <string.h> 29#include <fcntl.h> 30#include <stdlib.h> 31#include <errno.h> 32#include <sys/mman.h> 33#include <sys/syslimits.h> 34#include <mach-o/arch.h> 35#include <mach-o/loader.h> 36#include <mach/mach.h> 37 38#include <map> 39#include <vector> 40 41#include "dsc_iterator.h" 42#include "dyld_cache_format.h" 43#include "Architectures.hpp" 44#include "MachOFileAbstraction.hpp" 45#include "CacheFileAbstraction.hpp" 46 47enum Mode { 48 modeNone, 49 modeList, 50 modeMap, 51 modeDependencies, 52 modeSlideInfo, 53 modeLinkEdit, 54 modeInfo, 55 modeSize 56}; 57 58struct Options { 59 Mode mode; 60 const char* dependentsOfPath; 61 const void* mappedCache; 62 bool printUUIDs; 63 bool printVMAddrs; 64 bool printDylibVersions; 65 bool printInodes; 66}; 67 68struct TextInfo { 69 uint64_t textSize; 70 const char* path; 71}; 72 73struct TextInfoSorter { 74 bool operator()(const TextInfo& left, const TextInfo& right) { 75 return (left.textSize > right.textSize); 76 } 77}; 78 79struct Results { 80 std::map<uint32_t, const char*> pageToContent; 81 uint64_t linkeditBase; 82 bool dependentTargetFound; 83 std::vector<TextInfo> textSegments; 84}; 85 86 87 88void usage() { 89 fprintf(stderr, "Usage: dyld_shared_cache_util -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit | -map [ shared-cache-file ] | -slide_info | -info\n"); 90} 91 92#if __x86_64__ 93static bool isHaswell() 94{ 95 // check system is capable of running x86_64h code 96 struct host_basic_info info; 97 mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT; 98 mach_port_t hostPort = mach_host_self(); 99 kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count); 100 mach_port_deallocate(mach_task_self(), hostPort); 101 if ( result != KERN_SUCCESS ) 102 return false; 103 return ( info.cpu_subtype == CPU_SUBTYPE_X86_64_H ); 104} 105#endif 106 107/* 108 * Get the path to the native shared cache for this host 109 */ 110static const char* default_shared_cache_path() { 111#if __i386__ 112 return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "i386"; 113#elif __x86_64__ 114 if ( isHaswell() ) 115 return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64h"; 116 else 117 return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64"; 118#elif __ARM_ARCH_5TEJ__ 119 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv5"; 120#elif __ARM_ARCH_6K__ 121 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv6"; 122#elif __ARM_ARCH_7K__ 123 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7k"; 124#elif __ARM_ARCH_7A__ 125 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7"; 126#elif __ARM_ARCH_7F__ 127 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7f"; 128#elif __ARM_ARCH_7S__ 129 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7s"; 130#elif __arm64__ 131 return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64"; 132#else 133 #error unsupported architecture 134#endif 135} 136 137typedef void (*segment_callback_t)(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, 138 const Options& options, Results& results); 139 140 141 142/* 143 * List dependencies from the mach-o header at headerAddr 144 * in the same format as 'otool -L' 145 */ 146template <typename A> 147void print_dependencies(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, 148 const Options& options, Results& results) { 149 typedef typename A::P P; 150 typedef typename A::P::E E; 151 152 if ( strcmp(options.dependentsOfPath, dylibInfo->path) != 0 ) 153 return; 154 if ( strcmp(segInfo->name, "__TEXT") != 0 ) 155 return; 156 157 const macho_dylib_command<P>* dylib_cmd; 158 const macho_header<P>* mh = (const macho_header<P>*)dylibInfo->machHeader; 159 const macho_load_command<P>* const cmds = (macho_load_command<P>*)((uintptr_t)dylibInfo->machHeader + sizeof(macho_header<P>)); 160 const uint32_t cmd_count = mh->ncmds(); 161 const macho_load_command<P>* cmd = cmds; 162 for (uint32_t i = 0; i < cmd_count; ++i) { 163 switch ( cmd->cmd() ) { 164 case LC_LOAD_DYLIB: 165 case LC_ID_DYLIB: 166 case LC_REEXPORT_DYLIB: 167 case LC_LOAD_WEAK_DYLIB: 168 case LC_LOAD_UPWARD_DYLIB: 169 dylib_cmd = (macho_dylib_command<P>*)cmd; 170 if ( options.printDylibVersions ) { 171 uint32_t compat_vers = dylib_cmd->compatibility_version(); 172 uint32_t current_vers = dylib_cmd->current_version(); 173 printf("\t%s", dylib_cmd->name()); 174 if ( compat_vers != 0xFFFFFFFF ) { 175 printf("(compatibility version %u.%u.%u, current version %u.%u.%u)\n", 176 (compat_vers >> 16), 177 (compat_vers >> 8) & 0xff, 178 (compat_vers) & 0xff, 179 (current_vers >> 16), 180 (current_vers >> 8) & 0xff, 181 (current_vers) & 0xff); 182 } 183 else { 184 printf("\n"); 185 } 186 } 187 else { 188 printf("\t%s\n", dylib_cmd->name()); 189 } 190 break; 191 } 192 cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize()); 193 } 194 results.dependentTargetFound = true; 195} 196 197/* 198 * Print out a dylib from the shared cache, optionally including the UUID or unslid load address 199 */ 200template <typename A> 201void print_list(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, 202 const Options& options, Results& results) 203{ 204 if ( strcmp(segInfo->name, "__TEXT") != 0 ) 205 return; 206 207 if ( options.printVMAddrs ) 208 printf("0x%08llX ", segInfo->address); 209 if ( options.printInodes ) 210 printf("0x%08llX 0x%08llX ", dylibInfo->inode, dylibInfo->modTime); 211 if ( options.printUUIDs ) { 212 if ( dylibInfo->uuid != NULL ) { 213 const uint8_t* uuid = (uint8_t*)dylibInfo->uuid;; 214 printf("<%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X> ", 215 uuid[0], uuid[1], uuid[2], uuid[3], 216 uuid[4], uuid[5], uuid[6], uuid[7], 217 uuid[8], uuid[9], uuid[10], uuid[11], 218 uuid[12], uuid[13], uuid[14], uuid[15]); 219 } 220 else 221 printf("< no uuid in dylib > "); 222 } 223 if ( dylibInfo->isAlias ) 224 printf("[alias] %s\n", dylibInfo->path); 225 else 226 printf("%s\n", dylibInfo->path); 227} 228 229 230template <typename A> 231void collect_size(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, 232 const Options& options, Results& results) 233{ 234 if ( strcmp(segInfo->name, "__TEXT") != 0 ) 235 return; 236 if ( dylibInfo->isAlias ) 237 return; 238 239 TextInfo info; 240 info.textSize = segInfo->fileSize; 241 info.path = dylibInfo->path; 242 results.textSegments.push_back(info); 243 size_t size = segInfo->fileSize; 244} 245 246 247 248 249static void add_linkedit(uint32_t pageStart, uint32_t pageEnd, const char* message, Results& results) 250{ 251 for (uint32_t p = pageStart; p <= pageEnd; p += 4096) { 252 std::map<uint32_t, const char*>::iterator pos = results.pageToContent.find(p); 253 if ( pos == results.pageToContent.end() ) { 254 results.pageToContent[p] = strdup(message); 255 } 256 else { 257 const char* oldMessage = pos->second; 258 char* newMesssage; 259 asprintf(&newMesssage, "%s, %s", oldMessage, message); 260 results.pageToContent[p] = newMesssage; 261 ::free((void*)oldMessage); 262 } 263 } 264} 265 266 267/* 268 * get LINKEDIT info for dylib 269 */ 270template <typename A> 271void process_linkedit(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, 272 const Options& options, Results& results) { 273 typedef typename A::P P; 274 typedef typename A::P::E E; 275 // filter out symlinks 276 if ( dylibInfo->isAlias ) 277 return; 278 const macho_header<P>* mh = (const macho_header<P>*)dylibInfo->machHeader; 279 uint32_t ncmds = mh->ncmds(); 280 const macho_load_command<P>* const cmds = (macho_load_command<P>*)((long)mh + sizeof(macho_header<P>)); 281 const macho_load_command<P>* cmd = cmds; 282 for (uint32_t i = 0; i < ncmds; i++) { 283 if ( cmd->cmd() == LC_DYLD_INFO_ONLY ) { 284 macho_dyld_info_command<P>* dyldInfo = (macho_dyld_info_command<P>*)cmd; 285 char message[1000]; 286 const char* shortName = strrchr(dylibInfo->path, '/') + 1; 287 // add export trie info 288 if ( dyldInfo->export_size() != 0 ) { 289 //printf("export_off=0x%X\n", dyldInfo->export_off()); 290 uint32_t exportPageOffsetStart = dyldInfo->export_off() & (-4096); 291 uint32_t exportPageOffsetEnd = (dyldInfo->export_off() + dyldInfo->export_size()) & (-4096); 292 sprintf(message, "exports from %s", shortName); 293 add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message, results); 294 } 295 // add binding info 296 if ( dyldInfo->bind_size() != 0 ) { 297 uint32_t bindPageOffsetStart = dyldInfo->bind_off() & (-4096); 298 uint32_t bindPageOffsetEnd = (dyldInfo->bind_off() + dyldInfo->bind_size()) & (-4096); 299 sprintf(message, "bindings from %s", shortName); 300 add_linkedit(bindPageOffsetStart, bindPageOffsetEnd, message, results); 301 } 302 // add lazy binding info 303 if ( dyldInfo->lazy_bind_size() != 0 ) { 304 uint32_t lazybindPageOffsetStart = dyldInfo->lazy_bind_off() & (-4096); 305 uint32_t lazybindPageOffsetEnd = (dyldInfo->lazy_bind_off() + dyldInfo->lazy_bind_size()) & (-4096); 306 sprintf(message, "lazy bindings from %s", shortName); 307 add_linkedit(lazybindPageOffsetStart, lazybindPageOffsetEnd, message, results); 308 } 309 // add weak binding info 310 if ( dyldInfo->weak_bind_size() != 0 ) { 311 uint32_t weakbindPageOffsetStart = dyldInfo->weak_bind_off() & (-4096); 312 uint32_t weakbindPageOffsetEnd = (dyldInfo->weak_bind_off() + dyldInfo->weak_bind_size()) & (-4096); 313 sprintf(message, "weak bindings from %s", shortName); 314 add_linkedit(weakbindPageOffsetStart, weakbindPageOffsetEnd, message, results); 315 } 316 } 317 cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize()); 318 } 319} 320 321 322/* 323 * Print out a .map file similar to what update_dyld_shared_cache created when the cache file was built 324 */ 325template <typename A> 326void print_map(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) { 327 if ( !dylibInfo->isAlias ) 328 printf("0x%08llX - 0x%08llX %s %s\n", segInfo->address, segInfo->address + segInfo->fileSize, segInfo->name, dylibInfo->path); 329} 330 331 332static void checkMode(Mode mode) { 333 if ( mode != modeNone ) { 334 fprintf(stderr, "Error: select one of: -list, -dependents, -info, -slide_info, -linkedit, -map, or -size\n"); 335 usage(); 336 exit(1); 337 } 338} 339 340int main (int argc, const char* argv[]) { 341 342 const char* sharedCachePath = default_shared_cache_path(); 343 344 Options options; 345 options.mode = modeNone; 346 options.printUUIDs = false; 347 options.printVMAddrs = false; 348 options.printDylibVersions = false; 349 options.printInodes = false; 350 options.dependentsOfPath = NULL; 351 352 for (uint32_t i = 1; i < argc; i++) { 353 const char* opt = argv[i]; 354 if (opt[0] == '-') { 355 if (strcmp(opt, "-list") == 0) { 356 checkMode(options.mode); 357 options.mode = modeList; 358 } 359 else if (strcmp(opt, "-dependents") == 0) { 360 checkMode(options.mode); 361 options.mode = modeDependencies; 362 options.dependentsOfPath = argv[++i]; 363 if ( i >= argc ) { 364 fprintf(stderr, "Error: option -depdendents requires an argument\n"); 365 usage(); 366 exit(1); 367 } 368 } 369 else if (strcmp(opt, "-linkedit") == 0) { 370 checkMode(options.mode); 371 options.mode = modeLinkEdit; 372 } 373 else if (strcmp(opt, "-info") == 0) { 374 checkMode(options.mode); 375 options.mode = modeInfo; 376 } 377 else if (strcmp(opt, "-slide_info") == 0) { 378 checkMode(options.mode); 379 options.mode = modeSlideInfo; 380 } 381 else if (strcmp(opt, "-map") == 0) { 382 checkMode(options.mode); 383 options.mode = modeMap; 384 } 385 else if (strcmp(opt, "-size") == 0) { 386 checkMode(options.mode); 387 options.mode = modeSize; 388 } 389 else if (strcmp(opt, "-uuid") == 0) { 390 options.printUUIDs = true; 391 } 392 else if (strcmp(opt, "-inode") == 0) { 393 options.printInodes = true; 394 } 395 else if (strcmp(opt, "-versions") == 0) { 396 options.printDylibVersions = true; 397 } 398 else if (strcmp(opt, "-vmaddr") == 0) { 399 options.printVMAddrs = true; 400 } 401 else { 402 fprintf(stderr, "Error: unrecognized option %s\n", opt); 403 usage(); 404 exit(1); 405 } 406 } 407 else { 408 sharedCachePath = opt; 409 } 410 } 411 412 if ( options.mode == modeNone ) { 413 fprintf(stderr, "Error: select one of -list, -dependents, -info, -linkedit, or -map\n"); 414 usage(); 415 exit(1); 416 } 417 418 if ( options.mode != modeSlideInfo ) { 419 if ( options.printUUIDs && (options.mode != modeList) ) 420 fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n"); 421 422 if ( options.printVMAddrs && (options.mode != modeList) ) 423 fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n"); 424 425 if ( options.printDylibVersions && (options.mode != modeDependencies) ) 426 fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n"); 427 428 if ( (options.mode == modeDependencies) && (options.dependentsOfPath == NULL) ) { 429 fprintf(stderr, "Error: -dependents given, but no dylib path specified\n"); 430 usage(); 431 exit(1); 432 } 433 } 434 435 struct stat statbuf; 436 if ( ::stat(sharedCachePath, &statbuf) == -1 ) { 437 fprintf(stderr, "Error: stat() failed for dyld shared cache at %s, errno=%d\n", sharedCachePath, errno); 438 exit(1); 439 } 440 441 int cache_fd = ::open(sharedCachePath, O_RDONLY); 442 if ( cache_fd < 0 ) { 443 fprintf(stderr, "Error: open() failed for shared cache file at %s, errno=%d\n", sharedCachePath, errno); 444 exit(1); 445 } 446 options.mappedCache = ::mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, cache_fd, 0); 447 if (options.mappedCache == MAP_FAILED) { 448 fprintf(stderr, "Error: mmap() for shared cache at %s failed, errno=%d\n", sharedCachePath, errno); 449 exit(1); 450 } 451 452 if ( options.mode == modeSlideInfo ) { 453 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; 454 if ( header->slideInfoOffset() == 0 ) { 455 fprintf(stderr, "Error: dyld shared cache does not contain slide info\n"); 456 exit(1); 457 } 458 const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset()); 459 const dyldCacheFileMapping<LittleEndian>* dataMapping = &mappings[1]; 460 uint64_t dataStartAddress = dataMapping->address(); 461 uint64_t dataSize = dataMapping->size(); 462 const dyldCacheSlideInfo<LittleEndian>* slideInfoHeader = (dyldCacheSlideInfo<LittleEndian>*)((char*)options.mappedCache+header->slideInfoOffset()); 463 printf("slide info version=%d\n", slideInfoHeader->version()); 464 printf("toc_count=%d, data page count=%lld\n", slideInfoHeader->toc_count(), dataSize/4096); 465 const dyldCacheSlideInfoEntry* entries = (dyldCacheSlideInfoEntry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset()); 466 for(int i=0; i < slideInfoHeader->toc_count(); ++i) { 467 printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, slideInfoHeader->toc(i)); 468 const dyldCacheSlideInfoEntry* entry = &entries[slideInfoHeader->toc(i)]; 469 for(int j=0; j < slideInfoHeader->entries_size(); ++j) 470 printf("%02X", entry->bits[j]); 471 printf("\n"); 472 } 473 } 474 else if ( options.mode == modeInfo ) { 475 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache; 476 printf("uuid: "); 477 if ( header->mappingOffset() >= 0x68 ) { 478 const uint8_t* uuid = header->uuid(); 479 printf("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n", 480 uuid[0], uuid[1], uuid[2], uuid[3], 481 uuid[4], uuid[5], uuid[6], uuid[7], 482 uuid[8], uuid[9], uuid[10], uuid[11], 483 uuid[12], uuid[13], uuid[14], uuid[15]); 484 } 485 else { 486 printf("n/a\n"); 487 } 488 printf("image count: %u\n", header->imagesCount()); 489 printf("mappings:\n"); 490 const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset()); 491 for (uint32_t i=0; i < header->mappingCount(); ++i) { 492 if ( mappings[i].init_prot() & VM_PROT_EXECUTE ) 493 printf(" __TEXT %3lluMB, 0x%08llX -> 0x%08llX\n", mappings[i].size()/(1024*1024), mappings[i].address(), mappings[i].address() + mappings[i].size()); 494 else if ( mappings[i]. init_prot() & VM_PROT_WRITE ) 495 printf(" __DATA %3lluMB, 0x%08llX -> 0x%08llX\n", mappings[i].size()/(1024*1024), mappings[i].address(), mappings[i].address() + mappings[i].size()); 496 else if ( mappings[i].init_prot() & VM_PROT_READ ) 497 printf(" __LINKEDIT %3lluMB, 0x%08llX -> 0x%08llX\n", mappings[i].size()/(1024*1024), mappings[i].address(), mappings[i].address() + mappings[i].size()); 498 } 499 if ( header->codeSignatureOffset() != 0 ) { 500 uint64_t size = statbuf.st_size - header->codeSignatureOffset(); 501 uint64_t csAddr = mappings[header->mappingCount()-1].address() + mappings[header->mappingCount()-1].size(); 502 printf(" code sign %3lluMB, 0x%08llX -> 0x%08llX\n", size/(1024*1024), csAddr, csAddr + size); 503 } 504 } 505 else { 506 segment_callback_t callback; 507 if ( strcmp((char*)options.mappedCache, "dyld_v1 i386") == 0 ) { 508 switch ( options.mode ) { 509 case modeList: 510 callback = print_list<x86>; 511 break; 512 case modeMap: 513 callback = print_map<x86>; 514 break; 515 case modeDependencies: 516 callback = print_dependencies<x86>; 517 break; 518 case modeLinkEdit: 519 callback = process_linkedit<x86>; 520 break; 521 case modeSize: 522 callback = collect_size<x86>; 523 break; 524 case modeNone: 525 case modeInfo: 526 case modeSlideInfo: 527 break; 528 } 529 } 530 else if ( (strcmp((char*)options.mappedCache, "dyld_v1 x86_64") == 0) 531 || (strcmp((char*)options.mappedCache, "dyld_v1 x86_64h") == 0) ) { 532 switch ( options.mode ) { 533 case modeList: 534 callback = print_list<x86_64>; 535 break; 536 case modeMap: 537 callback = print_map<x86_64>; 538 break; 539 case modeDependencies: 540 callback = print_dependencies<x86_64>; 541 break; 542 case modeLinkEdit: 543 callback = process_linkedit<x86_64>; 544 break; 545 case modeSize: 546 callback = collect_size<x86_64>; 547 break; 548 case modeNone: 549 case modeInfo: 550 case modeSlideInfo: 551 break; 552 } 553 } 554 else if ( (strncmp((char*)options.mappedCache, "dyld_v1 armv", 14) == 0) 555 || (strncmp((char*)options.mappedCache, "dyld_v1 armv", 13) == 0) ) { 556 switch ( options.mode ) { 557 case modeList: 558 callback = print_list<arm>; 559 break; 560 case modeMap: 561 callback = print_map<arm>; 562 break; 563 case modeDependencies: 564 callback = print_dependencies<arm>; 565 break; 566 case modeLinkEdit: 567 callback = process_linkedit<arm>; 568 break; 569 case modeSize: 570 callback = collect_size<arm>; 571 break; 572 case modeNone: 573 case modeInfo: 574 case modeSlideInfo: 575 break; 576 } 577 } 578 else if ( strcmp((char*)options.mappedCache, "dyld_v1 arm64") == 0 ) { 579 switch ( options.mode ) { 580 case modeList: 581 callback = print_list<arm64>; 582 break; 583 case modeMap: 584 callback = print_map<arm64>; 585 break; 586 case modeDependencies: 587 callback = print_dependencies<arm64>; 588 break; 589 case modeLinkEdit: 590 callback = process_linkedit<arm64>; 591 break; 592 case modeSize: 593 callback = collect_size<arm64>; 594 break; 595 case modeNone: 596 case modeInfo: 597 case modeSlideInfo: 598 break; 599 } 600 } 601 else { 602 fprintf(stderr, "Error: unrecognized dyld shared cache magic.\n"); 603 exit(1); 604 } 605 606 __block Results results; 607 results.dependentTargetFound = false; 608 int iterateResult = dyld_shared_cache_iterate(options.mappedCache, (uint32_t)statbuf.st_size, 609 ^(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo ) { 610 (callback)(dylibInfo, segInfo, options, results); 611 }); 612 if ( iterateResult != 0 ) { 613 fprintf(stderr, "Error: malformed shared cache file\n"); 614 exit(1); 615 } 616 617 if ( options.mode == modeLinkEdit ) { 618 // dump -linkedit information 619 for (std::map<uint32_t, const char*>::iterator it = results.pageToContent.begin(); it != results.pageToContent.end(); ++it) { 620 printf("0x%08X %s\n", it->first, it->second); 621 } 622 } 623 else if ( options.mode == modeSize ) { 624 std::sort(results.textSegments.begin(), results.textSegments.end(), TextInfoSorter()); 625 for (std::vector<TextInfo>::iterator it = results.textSegments.begin(); it != results.textSegments.end(); ++it) { 626 printf(" 0x%08llX %s\n", it->textSize, it->path); 627 } 628 } 629 630 if ( (options.mode == modeDependencies) && options.dependentsOfPath && !results.dependentTargetFound) { 631 fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", options.dependentsOfPath, sharedCachePath); 632 exit(1); 633 } 634 } 635 return 0; 636} 637