launch-cache/dyld_shared_cache_util.cpp

   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 <dlfcn.h>
  30 #include <fcntl.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #include <sys/mman.h>
  34 #include <sys/syslimits.h>
  35 #include <mach-o/arch.h>
  36 #include <mach-o/loader.h>
  37 #include <mach-o/dyld.h>
  38 #include <mach/mach.h>
  39
  40 #include <map>
  41 #include <vector>
  42
  43 #include "dsc_iterator.h"
  44 #include "dsc_extractor.h"
  45 #include "dyld_cache_format.h"
  46 #include "Architectures.hpp"
  47 #include "MachOFileAbstraction.hpp"
  48 #include "CacheFileAbstraction.hpp"
  49 #include "Trie.hpp"
  50
  51 enum Mode {
  52         modeNone,
  53         modeList,
  54         modeMap,
  55         modeDependencies,
  56         modeSlideInfo,
  57         modeAcceleratorInfo,
  58         modeTextInfo,
  59         modeLinkEdit,
  60         modeLocalSymbols,
  61         modeInfo,
  62         modeSize,
  63         modeExtract
  64 };
  65
  66 struct Options {
  67         Mode            mode;
  68         const char*     dependentsOfPath;
  69         const void*     mappedCache;
  70         const char*     extractionDir;
  71         bool            printUUIDs;
  72         bool            printVMAddrs;
  73     bool                printDylibVersions;
  74         bool            printInodes;
  75 };
  76
  77 struct TextInfo {
  78         uint64_t                textSize;
  79         const char*             path;
  80 };
  81
  82 struct TextInfoSorter {
  83         bool operator()(const TextInfo& left, const TextInfo& right) {
  84                 return (left.textSize > right.textSize);
  85         }
  86 };
  87
  88 struct Results {
  89         std::map<uint32_t, const char*> pageToContent;
  90         uint64_t                                                linkeditBase;
  91         bool                                                    dependentTargetFound;
  92         std::vector<TextInfo>                   textSegments;
  93 };
  94
  95
  96
  97 void usage() {
  98         fprintf(stderr, "Usage: dyld_shared_cache_util -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit | -map | -slide_info | -info | -extract <dylib-dir>  [ shared-cache-file ] \n");
  99 }
 100
 101 #if __x86_64__
 102 static bool isHaswell()
 103 {
 104         // check system is capable of running x86_64h code
 105         struct host_basic_info info;
 106         mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
 107         mach_port_t hostPort = mach_host_self();
 108         kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count);
 109         mach_port_deallocate(mach_task_self(), hostPort);
 110         if ( result != KERN_SUCCESS )
 111                 return false;
 112         return ( info.cpu_subtype == CPU_SUBTYPE_X86_64_H );
 113 }
 114 #endif
 115
 116 /*
 117  * Get the path to the native shared cache for this host
 118  */
 119 static const char* default_shared_cache_path() {
 120 #if __i386__
 121         return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "i386";
 122 #elif __x86_64__
 123         if ( isHaswell() )
 124                 return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64h";
 125         else
 126                 return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64";
 127 #elif __ARM_ARCH_5TEJ__
 128         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv5";
 129 #elif __ARM_ARCH_6K__
 130         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv6";
 131 #elif __ARM_ARCH_7K__
 132         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7k";
 133 #elif __ARM_ARCH_7A__
 134         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7";
 135 #elif __ARM_ARCH_7F__
 136         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7f";
 137 #elif __ARM_ARCH_7S__
 138         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7s";
 139 #elif __arm64e__
 140         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64e";
 141 #elif __arm64__
 142         return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64";
 143 #else
 144         #error unsupported architecture
 145 #endif
 146 }
 147
 148 typedef void (*segment_callback_t)(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
 149                                                                         const Options& options, Results& results);
 150
 151
 152
 153 /*
 154  * List dependencies from the mach-o header at headerAddr
 155  * in the same format as 'otool -L'
 156  */
 157 template <typename A>
 158 void print_dependencies(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
 159                                                                                                                                         const Options& options, Results& results) {
 160         typedef typename A::P           P;
 161         typedef typename A::P::E        E;
 162
 163         if ( strcmp(options.dependentsOfPath, dylibInfo->path) != 0 )
 164                 return;
 165         if ( strcmp(segInfo->name, "__TEXT") != 0 )
 166                 return;
 167
 168         const macho_dylib_command<P>* dylib_cmd;
 169         const macho_header<P>* mh = (const macho_header<P>*)dylibInfo->machHeader;
 170         const macho_load_command<P>* const cmds = (macho_load_command<P>*)((uintptr_t)dylibInfo->machHeader + sizeof(macho_header<P>));
 171         const uint32_t cmd_count = mh->ncmds();
 172         const macho_load_command<P>* cmd = cmds;
 173         for (uint32_t i = 0; i < cmd_count; ++i) {
 174                 switch ( cmd->cmd() ) {
 175                         case LC_LOAD_DYLIB:
 176                         case LC_ID_DYLIB:
 177                         case LC_REEXPORT_DYLIB:
 178                         case LC_LOAD_WEAK_DYLIB:
 179                         case LC_LOAD_UPWARD_DYLIB:
 180                                 dylib_cmd = (macho_dylib_command<P>*)cmd;
 181                                 if ( options.printDylibVersions ) {
 182                                         uint32_t compat_vers = dylib_cmd->compatibility_version();
 183                                         uint32_t current_vers = dylib_cmd->current_version();
 184                                         printf("\t%s", dylib_cmd->name());
 185                                         if ( compat_vers != 0xFFFFFFFF ) {
 186                                                 printf("(compatibility version %u.%u.%u, current version %u.%u.%u)\n",
 187                                                    (compat_vers >> 16),
 188                                                    (compat_vers >> 8) & 0xff,
 189                                                    (compat_vers) & 0xff,
 190                                                    (current_vers >> 16),
 191                                                    (current_vers >> 8) & 0xff,
 192                                                    (current_vers) & 0xff);
 193                                         }
 194                                         else {
 195                                                 printf("\n");
 196                                         }
 197                                 }
 198                                 else {
 199                                         printf("\t%s\n", dylib_cmd->name());
 200                                 }
 201                                 break;
 202                 }
 203                 cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
 204         }
 205         results.dependentTargetFound = true;
 206 }
 207
 208 /*
 209  * Print out a dylib from the shared cache, optionally including the UUID or unslid load address
 210  */
 211 template <typename A>
 212 void print_list(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
 213                                                                                                                                                 const Options& options, Results& results)
 214 {
 215         if ( strcmp(segInfo->name, "__TEXT") != 0 )
 216                 return;
 217
 218         if ( options.printVMAddrs )
 219                 printf("0x%08llX ", segInfo->address);
 220         if ( options.printInodes )
 221                 printf("0x%08llX 0x%08llX ", dylibInfo->inode, dylibInfo->modTime);
 222         if ( options.printUUIDs ) {
 223                 if ( dylibInfo->uuid != NULL ) {
 224                         const uint8_t* uuid = (uint8_t*)dylibInfo->uuid;;
 225                         printf("<%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X> ",
 226                                 uuid[0],  uuid[1],  uuid[2],  uuid[3],
 227                                         uuid[4],  uuid[5],  uuid[6],  uuid[7],
 228                                 uuid[8],  uuid[9],  uuid[10], uuid[11],
 229                                         uuid[12], uuid[13], uuid[14], uuid[15]);
 230                 }
 231             else
 232                         printf("<     no uuid in dylib               > ");
 233     }
 234         if ( dylibInfo->isAlias )
 235                 printf("[alias] %s\n", dylibInfo->path);
 236         else
 237                 printf("%s\n", dylibInfo->path);
 238 }
 239
 240
 241 template <typename A>
 242 void collect_size(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
 243                                                                                                                                                 const Options& options, Results& results)
 244 {
 245         if ( strcmp(segInfo->name, "__TEXT") != 0 )
 246                 return;
 247         if ( dylibInfo->isAlias )
 248                 return;
 249
 250         TextInfo info;
 251         info.textSize = segInfo->fileSize;
 252         info.path = dylibInfo->path;
 253         results.textSegments.push_back(info);
 254 }
 255
 256
 257
 258
 259 static void add_linkedit(uint32_t pageStart, uint32_t pageEnd, const char* message, Results& results)
 260 {
 261         for (uint32_t p = pageStart; p <= pageEnd; p += 4096) {
 262                 std::map<uint32_t, const char*>::iterator pos = results.pageToContent.find(p);
 263                 if ( pos == results.pageToContent.end() ) {
 264                         results.pageToContent[p] = strdup(message);
 265                 }
 266                 else {
 267                         const char* oldMessage = pos->second;
 268                         char* newMesssage;
 269                         asprintf(&newMesssage, "%s, %s", oldMessage, message);
 270                         results.pageToContent[p] = newMesssage;
 271                         ::free((void*)oldMessage);
 272                 }
 273         }
 274 }
 275
 276
 277 /*
 278  * get LINKEDIT info for dylib
 279  */
 280 template <typename A>
 281 void process_linkedit(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
 282                                                                                                                                                         const Options& options, Results& results) {
 283         typedef typename A::P           P;
 284         typedef typename A::P::E        E;
 285         // filter out symlinks
 286         if ( dylibInfo->isAlias )
 287                 return;
 288         const macho_header<P>* mh = (const macho_header<P>*)dylibInfo->machHeader;
 289         uint32_t ncmds = mh->ncmds();
 290         const macho_load_command<P>* const cmds = (macho_load_command<P>*)((long)mh + sizeof(macho_header<P>));
 291         const macho_load_command<P>* cmd = cmds;
 292         for (uint32_t i = 0; i < ncmds; i++) {
 293                 if ( cmd->cmd() == LC_DYLD_INFO_ONLY ) {
 294                         macho_dyld_info_command<P>* dyldInfo = (macho_dyld_info_command<P>*)cmd;
 295                         char message[1000];
 296                         const char* shortName = strrchr(dylibInfo->path, '/') + 1;
 297                         // add export trie info
 298                         if ( dyldInfo->export_size() != 0 ) {
 299                                 //printf("export_off=0x%X\n", dyldInfo->export_off());
 300                                 uint32_t exportPageOffsetStart = dyldInfo->export_off() & (-4096);
 301                                 uint32_t exportPageOffsetEnd = (dyldInfo->export_off() + dyldInfo->export_size()) & (-4096);
 302                                 sprintf(message, "exports from %s", shortName);
 303                                 add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message, results);
 304                         }
 305                         // add binding info
 306                         if ( dyldInfo->bind_size() != 0 ) {
 307                                 uint32_t bindPageOffsetStart = dyldInfo->bind_off() & (-4096);
 308                                 uint32_t bindPageOffsetEnd = (dyldInfo->bind_off() + dyldInfo->bind_size()) & (-4096);
 309                                 sprintf(message, "bindings from %s", shortName);
 310                                 add_linkedit(bindPageOffsetStart, bindPageOffsetEnd, message, results);
 311                         }
 312                         // add lazy binding info
 313                         if ( dyldInfo->lazy_bind_size() != 0 ) {
 314                                 uint32_t lazybindPageOffsetStart = dyldInfo->lazy_bind_off() & (-4096);
 315                                 uint32_t lazybindPageOffsetEnd = (dyldInfo->lazy_bind_off() + dyldInfo->lazy_bind_size()) & (-4096);
 316                                 sprintf(message, "lazy bindings from %s", shortName);
 317                                 add_linkedit(lazybindPageOffsetStart, lazybindPageOffsetEnd, message, results);
 318                         }
 319                         // add weak binding info
 320                         if ( dyldInfo->weak_bind_size() != 0 ) {
 321                                 uint32_t weakbindPageOffsetStart = dyldInfo->weak_bind_off() & (-4096);
 322                                 uint32_t weakbindPageOffsetEnd = (dyldInfo->weak_bind_off() + dyldInfo->weak_bind_size()) & (-4096);
 323                                 sprintf(message, "weak bindings from %s", shortName);
 324                                 add_linkedit(weakbindPageOffsetStart, weakbindPageOffsetEnd, message, results);
 325                         }
 326                 }
 327                 cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
 328         }
 329 }
 330
 331
 332 /*
 333  * Print out a .map file similar to what update_dyld_shared_cache created when the cache file was built
 334  */
 335 template <typename A>
 336 void print_map(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) {
 337         if ( !dylibInfo->isAlias )
 338                 printf("0x%08llX - 0x%08llX %s %s\n", segInfo->address, segInfo->address + segInfo->fileSize, segInfo->name, dylibInfo->path);
 339 }
 340
 341
 342 static void checkMode(Mode mode) {
 343         if ( mode != modeNone ) {
 344                 fprintf(stderr, "Error: select one of: -list, -dependents, -info, -slide_info, -linkedit, -map, -extract, or -size\n");
 345                 usage();
 346                 exit(1);
 347         }
 348 }
 349
 350 int main (int argc, const char* argv[]) {
 351
 352         const char* sharedCachePath = default_shared_cache_path();
 353
 354         Options options;
 355         options.mode = modeNone;
 356     options.printUUIDs = false;
 357         options.printVMAddrs = false;
 358     options.printDylibVersions = false;
 359         options.printInodes = false;
 360     options.dependentsOfPath = NULL;
 361     options.extractionDir = NULL;
 362
 363     for (uint32_t i = 1; i < argc; i++) {
 364         const char* opt = argv[i];
 365         if (opt[0] == '-') {
 366             if (strcmp(opt, "-list") == 0) {
 367                                 checkMode(options.mode);
 368                                 options.mode = modeList;
 369             }
 370                         else if (strcmp(opt, "-dependents") == 0) {
 371                                 checkMode(options.mode);
 372                                 options.mode = modeDependencies;
 373                                 options.dependentsOfPath = argv[++i];
 374                 if ( i >= argc ) {
 375                     fprintf(stderr, "Error: option -depdendents requires an argument\n");
 376                     usage();
 377                     exit(1);
 378                 }
 379             }
 380                         else if (strcmp(opt, "-linkedit") == 0) {
 381                                 checkMode(options.mode);
 382                                 options.mode = modeLinkEdit;
 383                         }
 384                         else if (strcmp(opt, "-info") == 0) {
 385                                 checkMode(options.mode);
 386                                 options.mode = modeInfo;
 387                         }
 388                         else if (strcmp(opt, "-slide_info") == 0) {
 389                                 checkMode(options.mode);
 390                                 options.mode = modeSlideInfo;
 391                         }
 392                         else if (strcmp(opt, "-accelerator_info") == 0) {
 393                                 checkMode(options.mode);
 394                                 options.mode = modeAcceleratorInfo;
 395                         }
 396                         else if (strcmp(opt, "-text_info") == 0) {
 397                                 checkMode(options.mode);
 398                                 options.mode = modeTextInfo;
 399                         }
 400                         else if (strcmp(opt, "-local_symbols") == 0) {
 401                                 checkMode(options.mode);
 402                                 options.mode = modeLocalSymbols;
 403                         }
 404                         else if (strcmp(opt, "-map") == 0) {
 405                                 checkMode(options.mode);
 406                                 options.mode = modeMap;
 407             }
 408                         else if (strcmp(opt, "-size") == 0) {
 409                                 checkMode(options.mode);
 410                                 options.mode = modeSize;
 411             }
 412                         else if (strcmp(opt, "-extract") == 0) {
 413                                 checkMode(options.mode);
 414                                 options.mode = modeExtract;
 415                                 options.extractionDir = argv[++i];
 416                 if ( i >= argc ) {
 417                     fprintf(stderr, "Error: option -extract requires a directory argument\n");
 418                     usage();
 419                     exit(1);
 420                 }
 421            }
 422                         else if (strcmp(opt, "-uuid") == 0) {
 423                 options.printUUIDs = true;
 424             }
 425                         else if (strcmp(opt, "-inode") == 0) {
 426                 options.printInodes = true;
 427             }
 428                         else if (strcmp(opt, "-versions") == 0) {
 429                 options.printDylibVersions = true;
 430             }
 431                         else if (strcmp(opt, "-vmaddr") == 0) {
 432                                 options.printVMAddrs = true;
 433                     }
 434                         else {
 435                 fprintf(stderr, "Error: unrecognized option %s\n", opt);
 436                 usage();
 437                 exit(1);
 438             }
 439         }
 440                 else {
 441             sharedCachePath = opt;
 442         }
 443     }
 444
 445         if ( options.mode == modeNone ) {
 446                 fprintf(stderr, "Error: select one of -list, -dependents, -info, -linkedit, or -map\n");
 447                 usage();
 448                 exit(1);
 449         }
 450
 451         if ( options.mode != modeSlideInfo ) {
 452                 if ( options.printUUIDs && (options.mode != modeList) )
 453                         fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n");
 454
 455                 if ( options.printVMAddrs && (options.mode != modeList) )
 456                         fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n");
 457
 458                 if ( options.printDylibVersions && (options.mode != modeDependencies) )
 459                         fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n");
 460
 461                 if ( (options.mode == modeDependencies) && (options.dependentsOfPath == NULL) ) {
 462                         fprintf(stderr, "Error: -dependents given, but no dylib path specified\n");
 463                         usage();
 464                         exit(1);
 465                 }
 466         }
 467
 468         struct stat statbuf;
 469         if ( ::stat(sharedCachePath, &statbuf) == -1 ) {
 470                 fprintf(stderr, "Error: stat() failed for dyld shared cache at %s, errno=%d\n", sharedCachePath, errno);
 471                 exit(1);
 472         }
 473
 474         int cache_fd = ::open(sharedCachePath, O_RDONLY);
 475         if ( cache_fd < 0 ) {
 476                 fprintf(stderr, "Error: open() failed for shared cache file at %s, errno=%d\n", sharedCachePath, errno);
 477                 exit(1);
 478         }
 479         options.mappedCache = ::mmap(NULL, (size_t)statbuf.st_size, PROT_READ, MAP_PRIVATE, cache_fd, 0);
 480         if (options.mappedCache == MAP_FAILED) {
 481                 fprintf(stderr, "Error: mmap() for shared cache at %s failed, errno=%d\n", sharedCachePath, errno);
 482                 exit(1);
 483         }
 484
 485         if ( options.mode == modeSlideInfo ) {
 486                 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
 487                 if ( header->slideInfoOffset() == 0 ) {
 488                         fprintf(stderr, "Error: dyld shared cache does not contain slide info\n");
 489                         exit(1);
 490                 }
 491                 const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset());
 492                 const dyldCacheFileMapping<LittleEndian>* dataMapping = &mappings[1];
 493                 uint64_t dataStartAddress = dataMapping->address();
 494                 uint64_t dataSize = dataMapping->size();
 495                 const dyldCacheSlideInfo<LittleEndian>* slideInfoHeader = (dyldCacheSlideInfo<LittleEndian>*)((char*)options.mappedCache+header->slideInfoOffset());
 496                 printf("slide info version=%d\n", slideInfoHeader->version());
 497                 if ( slideInfoHeader->version() == 1 ) {
 498                         printf("toc_count=%d, data page count=%lld\n", slideInfoHeader->toc_count(), dataSize/4096);
 499                         const dyldCacheSlideInfoEntry* entries = (dyldCacheSlideInfoEntry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset());
 500                         for(int i=0; i < slideInfoHeader->toc_count(); ++i) {
 501                                 printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, slideInfoHeader->toc(i));
 502                                 const dyldCacheSlideInfoEntry* entry = &entries[slideInfoHeader->toc(i)];
 503                                 for(int j=0; j < slideInfoHeader->entries_size(); ++j)
 504                                         printf("%02X", entry->bits[j]);
 505                                 printf("\n");
 506                         }
 507                 }
 508                 else if ( slideInfoHeader->version() == 2 ) {
 509                         const dyldCacheSlideInfo2<LittleEndian>* slideInfo = (dyldCacheSlideInfo2<LittleEndian>*)(slideInfoHeader);
 510                         printf("page_size=%d\n", slideInfo->page_size());
 511                         printf("delta_mask=0x%016llX\n", slideInfo->delta_mask());
 512                         printf("value_add=0x%016llX\n", slideInfo->value_add());
 513                         printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count(), slideInfo->page_extras_count());
 514                         const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset());
 515                         const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset());
 516                         for (int i=0; i < slideInfo->page_starts_count(); ++i) {
 517                                 const uint16_t start = starts[i];
 518                                 if ( start == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE ) {
 519                                         printf("page[% 5d]: no rebasing\n", i);
 520                                 }
 521                                 else if ( start & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
 522                                         printf("page[% 5d]: ", i);
 523                                         int j=(start & 0x3FFF);
 524                                         bool done = false;
 525                                         do {
 526                                                 uint16_t aStart = extras[j];
 527                                                 printf("start=0x%04X ", aStart & 0x3FFF);
 528                                                 done = (extras[j] & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
 529                                                 ++j;
 530                                         } while ( !done );
 531                                         printf("\n");
 532                                 }
 533                                 else {
 534                                         printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
 535                                 }
 536                         }
 537                 }
 538         }
 539         else if ( options.mode == modeInfo ) {
 540                 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
 541                 printf("uuid: ");
 542                 if ( header->mappingOffset() >= 0x68 ) {
 543                         const uint8_t* uuid = header->uuid();
 544                         printf("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
 545                                    uuid[0],  uuid[1],  uuid[2],  uuid[3],
 546                                    uuid[4],  uuid[5],  uuid[6],  uuid[7],
 547                                    uuid[8],  uuid[9],  uuid[10], uuid[11],
 548                                    uuid[12], uuid[13], uuid[14], uuid[15]);
 549                 }
 550                 else {
 551                         printf("n/a\n");
 552                 }
 553                 if ( header->mappingOffset() >= 0xE0 ) {
 554             // HACK until this uses new header
 555             uint32_t platform = *((uint32_t*)(((char*)header) + 0xD8));
 556             uint32_t simulator = *((uint32_t*)(((char*)header) + 0xDC));
 557             switch (platform) {
 558                 case 1:
 559                     printf("platform: macOS\n");
 560                     break;
 561                 case 2:
 562                     if ( simulator & 0x400 )
 563                         printf("platform: iOS simulator\n");
 564                     else
 565                         printf("platform: iOS\n");
 566                     break;
 567                 case 3:
 568                     if ( simulator & 0x400 )
 569                         printf("platform: tvOS simulator\n");
 570                     else
 571                         printf("platform: tvOS\n");
 572                     break;
 573                 case 4:
 574                     if ( simulator & 0x400 )
 575                         printf("platform: watchOS simulator\n");
 576                     else
 577                         printf("platform: watchOS\n");
 578                     break;
 579                 case 5:
 580                     printf("platform: bridgeOS\n");
 581                     break;
 582                 default:
 583                     printf("platform: 0x%08X 0x%08X\n", platform, simulator);
 584             }
 585         }
 586                 printf("image count: %u\n", header->imagesCount());
 587                 if ( (header->mappingOffset() >= 0x78) && (header->branchPoolsOffset() != 0) ) {
 588                         printf("branch pool count:  %u\n", header->branchPoolsCount());
 589                 }
 590                 printf("mappings:\n");
 591                 const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset());
 592                 for (uint32_t i=0; i < header->mappingCount(); ++i) {
 593                         if ( mappings[i].init_prot() & VM_PROT_EXECUTE )
 594                                 printf("    __TEXT      %3lluMB,  file offset: 0x%08llX -> 0x%08llX,  address: 0x%08llX -> 0x%08llX\n",
 595                                                 mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(),
 596                                                                                                             mappings[i].address(), mappings[i].address() + mappings[i].size());
 597                         else if ( mappings[i]. init_prot() & VM_PROT_WRITE )
 598                                 printf("    __DATA      %3lluMB,  file offset: 0x%08llX -> 0x%08llX,  address: 0x%08llX -> 0x%08llX\n",
 599                                                 mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(),
 600                                                                                                             mappings[i].address(), mappings[i].address() + mappings[i].size());
 601                         else if ( mappings[i].init_prot() & VM_PROT_READ )
 602                                 printf("    __LINKEDIT  %3lluMB,  file offset: 0x%08llX -> 0x%08llX,  address: 0x%08llX -> 0x%08llX\n",
 603                                                 mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(),
 604                                                                                                             mappings[i].address(), mappings[i].address() + mappings[i].size());
 605                 }
 606                 if ( header->codeSignatureOffset() != 0 ) {
 607                         uint64_t size = statbuf.st_size - header->codeSignatureOffset();
 608                         uint64_t csAddr = mappings[header->mappingCount()-1].address() + mappings[header->mappingCount()-1].size();
 609                         if ( size != 0 )
 610                                 printf("    code sign   %3lluMB,  file offset: 0x%08llX -> 0x%08llX,  address: 0x%08llX -> 0x%08llX\n",
 611                                         size/(1024*1024), header->codeSignatureOffset(), header->codeSignatureOffset() + size, csAddr, csAddr + size);
 612                 }
 613                                 printf("slide info:    %4lluKB,  file offset: 0x%08llX -> 0x%08llX\n",
 614                                                 header->slideInfoSize()/1024, header->slideInfoOffset(), header->slideInfoOffset() + header->slideInfoSize());
 615                 if ( header->localSymbolsOffset() != 0 )
 616                         printf("local symbols:  %3lluMB,  file offset: 0x%08llX -> 0x%08llX\n",
 617                                                 header->localSymbolsSize()/(1024*1024), header->localSymbolsOffset(), header->localSymbolsOffset() + header->localSymbolsSize());
 618                 if ( (header->mappingOffset() >= 0x78) && (header->accelerateInfoSize() != 0) )
 619                                 printf("accelerate tab: %3lluKB,                                          address: 0x%08llX -> 0x%08llX\n",
 620                                                 header->accelerateInfoSize()/1024, header->accelerateInfoAddr(), header->accelerateInfoAddr() + header->accelerateInfoSize());
 621         }
 622         else if ( options.mode == modeAcceleratorInfo ) {
 623                 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
 624                 if ( (header->mappingOffset() < sizeof(dyldCacheHeader<LittleEndian>)) || (header->accelerateInfoSize() == 0) ) {
 625                         printf("no accelerator info\n");
 626                 }
 627                 else {
 628                         const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset());
 629                         uint64_t aiAddr = header->accelerateInfoAddr();
 630                         dyldCacheAcceleratorInfo<LittleEndian>* accelInfo = NULL;
 631                         for (uint32_t i=0; i < header->mappingCount(); ++i) {
 632                                 if ( (mappings[i].address() <= aiAddr) && (aiAddr < mappings[i].address()+mappings[i].size()) ) {
 633                                         uint64_t offset = aiAddr - mappings[i].address() + mappings[i].file_offset();
 634                                         accelInfo = (dyldCacheAcceleratorInfo<LittleEndian>*)((uint8_t*)options.mappedCache + offset);
 635                                 }
 636                         }
 637                         if ( accelInfo == NULL ) {
 638                                 printf("accelerator info not in any mapped range\n");
 639                         }
 640                         else {
 641                                 const dyldCacheImageInfo<LittleEndian>* images = (dyldCacheImageInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesOffset());
 642                                 const dyldCacheImageInfoExtra<LittleEndian>* imagesExtra = (dyldCacheImageInfoExtra<LittleEndian>*)((char*)accelInfo + accelInfo->imagesExtrasOffset());
 643                                 const uint16_t* dependencyArray = (uint16_t*)((char*)accelInfo + accelInfo->depListOffset());
 644                                 const uint16_t* reExportArray = (uint16_t*)((char*)accelInfo + accelInfo->reExportListOffset());
 645                                 printf("extra image info (count=%u):\n", accelInfo->imageExtrasCount());
 646                                 for (uint32_t i=0; i < accelInfo->imageExtrasCount(); ++i) {
 647                                         printf("  image[%3u] %s:\n", i, (char*)options.mappedCache +images[i].pathFileOffset());
 648                                         printf("     exports trie: addr=0x%llX, size=0x%08X\n", imagesExtra[i].exportsTrieAddr(), imagesExtra[i].exportsTrieSize());
 649                                         if ( imagesExtra[i].weakBindingsSize() )
 650                                                 printf("     weak bind info: addr=0x%llX, size=0x%08X\n", imagesExtra[i].weakBindingsAddr(), imagesExtra[i].weakBindingsSize());
 651                                         printf("     dependents: ");
 652                                         for (uint32_t d=imagesExtra[i].dependentsStartArrayIndex(); dependencyArray[d] != 0xFFFF; ++d) {
 653                                                 uint16_t depIndex = dependencyArray[d];
 654                                                 if ( depIndex & 0x8000 )
 655                                                         printf(" up(%d) ", depIndex & 0x7FFF);
 656                                                 else
 657                                                         printf(" %d ", depIndex);
 658                                         }
 659                                         printf("\n");
 660                                         printf("     re-exports: ");
 661                                         for (uint32_t r=imagesExtra[i].reExportsStartArrayIndex(); reExportArray[r] != 0xFFFF; ++r)
 662                                                 printf(" %d ", reExportArray[r]);
 663                                         printf("\n");
 664                                 }
 665                                 printf("libdyld.dylib:\n");
 666                                 printf("   __dyld section address: 0x%llX\n", accelInfo->dyldSectionAddr());
 667                                 printf("initializers (count=%u):\n", accelInfo->initializersCount());
 668                                 const dyldCacheAcceleratorInitializer<LittleEndian>* initializers = (dyldCacheAcceleratorInitializer<LittleEndian>*)((char*)accelInfo + accelInfo->initializersOffset());
 669                                 for (uint32_t i=0; i < accelInfo->initializersCount(); ++i) {
 670                                         printf("  image[%3u] 0x%llX\n", initializers[i].imageIndex(), mappings[0].address() + initializers[i].functionOffset());
 671                                 }
 672                                 printf("DOF sections (count=%u):\n", accelInfo->dofSectionsCount());
 673                                 const dyldCacheAcceleratorDOFEntry<LittleEndian>* dofs = (dyldCacheAcceleratorDOFEntry<LittleEndian>*)((char*)accelInfo + accelInfo->dofSectionsOffset());
 674                                 for (uint32_t i=0; i < accelInfo->dofSectionsCount(); ++i) {
 675                                         printf("  image[%3u] 0x%llX -> 0x%llX\n", dofs[i].imageIndex(), dofs[i].sectionAddress(), dofs[i].sectionAddress()+dofs[i].sectionSize());
 676                                 }
 677                                 printf("bottom up order (count=%u):\n", accelInfo->imageExtrasCount());
 678                                 const uint16_t* bottomUpArray = (uint16_t*)((char*)accelInfo + accelInfo->bottomUpListOffset());
 679                                 for (uint32_t i=0; i < accelInfo->imageExtrasCount(); ++i) {
 680                                         unsigned imageIndex = bottomUpArray[i];
 681                                         if ( imageIndex < accelInfo->imageExtrasCount() )
 682                                                 printf("  image[%3u] %s\n", imageIndex, (char*)options.mappedCache + images[imageIndex].pathFileOffset());
 683                                         else
 684                                                 printf("  image[%3u] BAD INDEX\n", imageIndex);
 685                                 }
 686                                 printf("range table (count=%u):\n", accelInfo->rangeTableCount());
 687                                 const dyldCacheAcceleratorRangeEntry<LittleEndian>* rangeTable = (dyldCacheAcceleratorRangeEntry<LittleEndian>*)((char*)accelInfo + accelInfo->rangeTableOffset());
 688                                 for (uint32_t i=0; i < accelInfo->rangeTableCount(); ++i) {
 689                                         const dyldCacheAcceleratorRangeEntry<LittleEndian>& entry = rangeTable[i];
 690                                         printf("  0x%llX -> 0x%llX %s\n", entry.startAddress(), entry.startAddress() + entry.size(), (char*)options.mappedCache + images[entry.imageIndex()].pathFileOffset());
 691                                 }
 692                                 printf("dylib trie (size=%u):\n", accelInfo->dylibTrieSize());
 693                                 const uint8_t* dylibTrieStart = (uint8_t*)accelInfo + accelInfo->dylibTrieOffset();
 694                                 const uint8_t* dylibTrieEnd = dylibTrieStart + accelInfo->dylibTrieSize();
 695                                 std::vector<DylibIndexTrie::Entry> dylibEntries;
 696                                 if ( !Trie<DylibIndex>::parseTrie(dylibTrieStart, dylibTrieEnd, dylibEntries) )
 697                                         printf("  malformed dylibs trie\n");
 698                                 for (const DylibIndexTrie::Entry& x : dylibEntries) {
 699                                         printf("  image[%3u] %s\n", x.info.index, x.name.c_str());
 700                                 }
 701                         }
 702                 }
 703         }
 704         else if ( options.mode == modeTextInfo ) {
 705                 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
 706                 if ( (header->mappingOffset() < sizeof(dyldCacheHeader<LittleEndian>)) || (header->imagesTextCount() == 0) ) {
 707                         printf("no text info\n");
 708                 }
 709                 else {
 710                         const dyldCacheImageTextInfo<LittleEndian>* imagesText = (dyldCacheImageTextInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesTextOffset());
 711                         const dyldCacheImageTextInfo<LittleEndian>* imagesTextEnd = &imagesText[header->imagesTextCount()];
 712                         printf("dylib text infos (count=%llu):\n", header->imagesTextCount());
 713                         for (const dyldCacheImageTextInfo<LittleEndian>* p=imagesText; p < imagesTextEnd; ++p) {
 714                                 printf("   0x%09llX -> 0x%09llX  <", p->loadAddress(), p->loadAddress() + p->textSegmentSize());
 715                                 for (int i=0; i<16; ++i) {
 716                                         switch (i) {
 717                                                 case 4:
 718                                                 case 6:
 719                                                 case 8:
 720                                                 case 10:
 721                                                         printf("-");
 722                                                         break;
 723                                         }
 724                                         printf("%02X", p->uuid()[i]);
 725                                 }
 726                                 printf(">  %s\n", (char*)options.mappedCache + p->pathOffset());
 727                         }
 728                 }
 729         }
 730         else if ( options.mode == modeLocalSymbols ) {
 731                 const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
 732                 if ( header->localSymbolsOffset() == 0 ) {
 733                         fprintf(stderr, "Error: dyld shared cache does not contain local symbols info\n");
 734                         exit(1);
 735                 }
 736                 const bool is64 = (strstr((char*)options.mappedCache, "64") != NULL);
 737                 const dyldCacheImageInfo<LittleEndian>* imageInfos = (dyldCacheImageInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesOffset());
 738                 const dyldCacheLocalSymbolsInfo<LittleEndian>* localsInfo = (dyldCacheLocalSymbolsInfo<LittleEndian>*)((char*)options.mappedCache + header->localSymbolsOffset());
 739                 const uint32_t nlistFileOffset = (uint32_t)(header->localSymbolsOffset() + localsInfo->nlistOffset());
 740                 const uint32_t nlistCount = localsInfo->nlistCount();
 741                 const uint32_t nlistByteSize = is64 ? nlistCount*16 : nlistCount*12;
 742                 const uint32_t stringsFileOffset = (uint32_t)(header->localSymbolsOffset() + localsInfo->stringsOffset());
 743                 const uint32_t stringsSize = localsInfo->stringsSize();
 744                 const uint32_t entriesCount = localsInfo->entriesCount();
 745                 const dyldCacheLocalSymbolEntry<LittleEndian>* entries = (dyldCacheLocalSymbolEntry<LittleEndian>*)((char*)localsInfo + localsInfo->entriesOffset());
 746                 printf("local symbols nlist array:  %3uMB,  file offset: 0x%08X -> 0x%08X\n", nlistByteSize/(1024*1024), nlistFileOffset, nlistFileOffset+nlistByteSize);
 747                 printf("local symbols string pool:  %3uMB,  file offset: 0x%08X -> 0x%08X\n", stringsSize/(1024*1024), stringsFileOffset, stringsFileOffset+stringsSize);
 748                 printf("local symbols by dylib (count=%d):\n", entriesCount);
 749                 //const char* stringPool = (char*)options.mappedCache + stringsFileOffset;
 750                 for (int i=0; i < entriesCount; ++i) {
 751                         const char* imageName = (char*)options.mappedCache + imageInfos[i].pathFileOffset();
 752                         printf("   nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", entries[i].nlistStartIndex(), entries[i].nlistCount(), imageName);
 753                 #if 0
 754                         if ( is64 ) {
 755                                 const nlist_64* symTab = (nlist_64*)((char*)options.mappedCache + nlistFileOffset);
 756                                 for (int e=0; e < entries[i].nlistCount(); ++e) {
 757                                         const nlist_64* entry = &symTab[entries[i].nlistStartIndex()+e];
 758                                         printf("     nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringPool[entry->n_un.n_strx]);
 759                                         printf("     nlist[%d].value=0x%0llX\n", e, entry->n_value);
 760                                 }
 761                         }
 762                 #endif
 763                 }
 764         }
 765         else if ( options.mode == modeExtract ) {
 766                 char pathBuffer[PATH_MAX];
 767                 uint32_t bufferSize = PATH_MAX;
 768                 if ( _NSGetExecutablePath(pathBuffer, &bufferSize) != 0 ) {
 769                         fprintf(stderr, "Error: could not get path of program\n");
 770                         return 1;
 771                 }
 772                 char* last = strrchr(pathBuffer, '/');
 773                 strcpy(last+1, "../../lib/dsc_extractor.bundle");
 774                 void* handle = dlopen(pathBuffer, RTLD_LAZY);
 775                 if ( handle == NULL ) {
 776                         fprintf(stderr, "Error: dsc_extractor.bundle could not be loaded at %s\n", pathBuffer);
 777                         return 1;
 778                 }
 779
 780                 typedef int (*extractor_proc)(const char* shared_cache_file_path, const char* extraction_root_path,
 781                                                                           void (^progress)(unsigned current, unsigned total));
 782
 783                 extractor_proc proc = (extractor_proc)dlsym(handle, "dyld_shared_cache_extract_dylibs_progress");
 784                 if ( proc == NULL ) {
 785                         fprintf(stderr, "Error: dsc_extractor.bundle did not have dyld_shared_cache_extract_dylibs_progress symbol\n");
 786                         return 1;
 787                 }
 788
 789                 int result = (*proc)(sharedCachePath, options.extractionDir, ^(unsigned c, unsigned total) { } );
 790                 return result;
 791         }
 792         else {
 793                 segment_callback_t callback = nullptr;
 794                 if ( strcmp((char*)options.mappedCache, "dyld_v1    i386") == 0 ) {
 795                         switch ( options.mode ) {
 796                                 case modeList:
 797                                         callback = print_list<x86>;
 798                                         break;
 799                                 case modeMap:
 800                                         callback = print_map<x86>;
 801                                         break;
 802                                 case modeDependencies:
 803                                         callback = print_dependencies<x86>;
 804                                         break;
 805                                 case modeLinkEdit:
 806                                         callback = process_linkedit<x86>;
 807                                         break;
 808                                 case modeSize:
 809                                         callback = collect_size<x86>;
 810                                         break;
 811                                 case modeNone:
 812                                 case modeInfo:
 813                                 case modeSlideInfo:
 814                                 case modeAcceleratorInfo:
 815                                 case modeTextInfo:
 816                                 case modeLocalSymbols:
 817                                 case modeExtract:
 818                                         break;
 819                         }
 820                 }
 821                 else if (  (strcmp((char*)options.mappedCache, "dyld_v1  x86_64") == 0)
 822                                 || (strcmp((char*)options.mappedCache, "dyld_v1 x86_64h") == 0) ) {
 823                         switch ( options.mode ) {
 824                                 case modeList:
 825                                         callback = print_list<x86_64>;
 826                                         break;
 827                                 case modeMap:
 828                                         callback = print_map<x86_64>;
 829                                         break;
 830                                 case modeDependencies:
 831                                         callback = print_dependencies<x86_64>;
 832                                         break;
 833                                 case modeLinkEdit:
 834                                         callback = process_linkedit<x86_64>;
 835                                         break;
 836                                 case modeSize:
 837                                         callback = collect_size<x86_64>;
 838                                         break;
 839                                 case modeNone:
 840                                 case modeInfo:
 841                                 case modeSlideInfo:
 842                                 case modeAcceleratorInfo:
 843                                 case modeTextInfo:
 844                                 case modeLocalSymbols:
 845                                 case modeExtract:
 846                                         break;
 847                         }
 848                 }
 849                 else if ( (strncmp((char*)options.mappedCache, "dyld_v1   armv", 14) == 0)
 850                            || (strncmp((char*)options.mappedCache, "dyld_v1  armv", 13) == 0) ) {
 851                         switch ( options.mode ) {
 852                                 case modeList:
 853                                         callback = print_list<arm>;
 854                                         break;
 855                                 case modeMap:
 856                                         callback = print_map<arm>;
 857                                         break;
 858                                 case modeDependencies:
 859                                         callback = print_dependencies<arm>;
 860                                         break;
 861                                 case modeLinkEdit:
 862                                         callback = process_linkedit<arm>;
 863                                         break;
 864                                 case modeSize:
 865                                         callback = collect_size<arm>;
 866                                         break;
 867                                 case modeNone:
 868                                 case modeInfo:
 869                                 case modeSlideInfo:
 870                                 case modeAcceleratorInfo:
 871                                 case modeTextInfo:
 872                                 case modeLocalSymbols:
 873                                 case modeExtract:
 874                                         break;
 875                         }
 876                 }
 877                 else if ( (strcmp((char*)options.mappedCache, "dyld_v1   arm64") == 0)
 878                || (strcmp((char*)options.mappedCache, "dyld_v1  arm64e") == 0) ) {
 879                         switch ( options.mode ) {
 880                                 case modeList:
 881                                         callback = print_list<arm64>;
 882                                         break;
 883                                 case modeMap:
 884                                         callback = print_map<arm64>;
 885                                         break;
 886                                 case modeDependencies:
 887                                         callback = print_dependencies<arm64>;
 888                                         break;
 889                                 case modeLinkEdit:
 890                                         callback = process_linkedit<arm64>;
 891                                         break;
 892                                 case modeSize:
 893                                         callback = collect_size<arm64>;
 894                                         break;
 895                                 case modeNone:
 896                                 case modeInfo:
 897                                 case modeSlideInfo:
 898                                 case modeAcceleratorInfo:
 899                                 case modeTextInfo:
 900                                 case modeLocalSymbols:
 901                                 case modeExtract:
 902                                         break;
 903                         }
 904                 }
 905                 else {
 906                         fprintf(stderr, "Error: unrecognized dyld shared cache magic.\n");
 907                         exit(1);
 908                 }
 909
 910                 __block Results results;
 911                 results.dependentTargetFound = false;
 912                 int iterateResult = dyld_shared_cache_iterate(options.mappedCache, (uint32_t)statbuf.st_size,
 913                                                                                    ^(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo ) {
 914                                                                                            (callback)(dylibInfo, segInfo, options, results);
 915                                                                                    });
 916                 if ( iterateResult != 0 ) {
 917                         fprintf(stderr, "Error: malformed shared cache file\n");
 918                         exit(1);
 919                 }
 920
 921                 if ( options.mode == modeLinkEdit ) {
 922                         // dump -linkedit information
 923                         for (std::map<uint32_t, const char*>::iterator it = results.pageToContent.begin(); it != results.pageToContent.end(); ++it) {
 924                                 printf("0x%08X %s\n", it->first, it->second);
 925                         }
 926                 }
 927                 else if ( options.mode == modeSize ) {
 928                         std::sort(results.textSegments.begin(), results.textSegments.end(), TextInfoSorter());
 929                         for (std::vector<TextInfo>::iterator it = results.textSegments.begin(); it != results.textSegments.end(); ++it) {
 930                                 printf(" 0x%08llX  %s\n", it->textSize, it->path);
 931                         }
 932                 }
 933
 934                 if ( (options.mode == modeDependencies) && options.dependentsOfPath && !results.dependentTargetFound) {
 935                         fprintf(stderr, "Error: could not find '%s' in the shared cache at\n  %s\n", options.dependentsOfPath, sharedCachePath);
 936                         exit(1);
 937                 }
 938         }
 939         return 0;
 940 }