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--- dyld/dyld-239.4/launch-cache/dyld_shared_cache_util.cpp
+++ dyld/dyld-750.5/launch-cache/dyld_shared_cache_util.cpp
@@ -1,16 +1,16 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+/* -*- 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,
@@ -18,7 +18,7 @@
* 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@
*/
@@ -26,6 +26,7 @@
#include <unistd.h>
#include <sys/stat.h>
#include <string.h>
+#include <dlfcn.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
@@ -33,500 +34,1559 @@
#include <sys/syslimits.h>
#include <mach-o/arch.h>
#include <mach-o/loader.h>
+#include <mach-o/dyld_priv.h>
+#include <bootstrap.h>
+#include <mach/mach.h>
+#include <dispatch/dispatch.h>
+
+#include <TargetConditionals.h>
#include <map>
-
-#include "dsc_iterator.h"
-#include "dyld_cache_format.h"
-#include "Architectures.hpp"
-#include "MachOFileAbstraction.hpp"
-#include "CacheFileAbstraction.hpp"
-
+#include <vector>
+#include <iostream>
+#include <optional>
+
+#include "ClosureBuilder.h"
+#include "DyldSharedCache.h"
+#include "ClosureFileSystemPhysical.h"
+#include "JSONWriter.h"
+#include "Trie.hpp"
+
+#include "objc-shared-cache.h"
+
+#if TARGET_OS_OSX
+#define DSC_BUNDLE_REL_PATH "../../lib/dsc_extractor.bundle"
+#else
+#define DSC_BUNDLE_REL_PATH "../lib/dsc_extractor.bundle"
+#endif
+
+using dyld3::closure::ClosureBuilder;
+using dyld3::closure::FileSystemPhysical;
+
+// mmap() an shared cache file read/only but laid out like it would be at runtime
+static const DyldSharedCache* mapCacheFile(const char* path)
+{
+ 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);
+
+ return (DyldSharedCache*)result;
+}
enum Mode {
- modeNone,
- modeList,
- modeMap,
- modeDependencies,
- modeSlideInfo,
- modeLinkEdit,
- modeInfo
+ modeNone,
+ modeList,
+ modeMap,
+ modeDependencies,
+ modeSlideInfo,
+ modeVerboseSlideInfo,
+ modeAcceleratorInfo,
+ modeTextInfo,
+ modeLinkEdit,
+ modeLocalSymbols,
+ modeJSONMap,
+ modeJSONDependents,
+ modeSectionSizes,
+ modeStrings,
+ modeInfo,
+ modeSize,
+ modeObjCProtocols,
+ modeObjCClasses,
+ modeObjCSelectors,
+ modeExtract
};
struct Options {
- Mode mode;
- const char* dependentsOfPath;
- const void* mappedCache;
- bool printUUIDs;
- bool printVMAddrs;
- bool printDylibVersions;
+ Mode mode;
+ const char* dependentsOfPath;
+ const char* extractionDir;
+ bool printUUIDs;
+ bool printVMAddrs;
+ bool printDylibVersions;
+ bool printInodes;
};
-struct Results {
- std::map<uint32_t, const char*> pageToContent;
- uint64_t linkeditBase;
- bool dependentTargetFound;
-};
-
-
-
-
void usage() {
- fprintf(stderr, "Usage: dyld_shared_cache_util -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit | -map [ shared-cache-file ] | -slide_info | -info\n");
+ 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");
}
-/*
- * 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__
- 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_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 __ARM_ARCH_7K__
- return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7k";
-#else
- #error unsupported architecture
-#endif
+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);
+ }
}
-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;
+static bool isAlias(const char* path, const DyldSharedCache* dyldCache) {
+ const dyld_cache_header* header = &dyldCache->header;
+ const dyld_cache_mapping_info* mappings = (const dyld_cache_mapping_info*)((char*)dyldCache + header->mappingOffset);
+ const dyld_cache_mapping_info* textMapping = &mappings[0];
+ // paths for aliases are store between cache header and first segment
+ return path < (char*)textMapping;
}
-/*
- * 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.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);
-}
-
-
-
-
-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, -linkedit, or -map\n");
- usage();
- exit(1);
- }
-}
-
int main (int argc, const char* argv[]) {
- const char* sharedCachePath = default_shared_cache_path();
-
- Options options;
- options.mode = modeNone;
+ const char* sharedCachePath = nullptr;
+
+ Options options;
+ options.mode = modeNone;
options.printUUIDs = false;
- options.printVMAddrs = 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];
+ 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, "-map") == 0) {
- checkMode(options.mode);
- options.mode = modeMap;
- }
- else if (strcmp(opt, "-uuid") == 0) {
+ }
+ 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, "-sections") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSectionSizes;
+ }
+ 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, "-json-map") == 0) {
+ checkMode(options.mode);
+ options.mode = modeJSONMap;
+ }
+ else if (strcmp(opt, "-json-dependents") == 0) {
+ checkMode(options.mode);
+ options.mode = modeJSONDependents;
+ }
+ else if (strcmp(opt, "-size") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSize;
+ }
+ else if (strcmp(opt, "-objc-protocols") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCProtocols;
+ }
+ else if (strcmp(opt, "-objc-classes") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCClasses;
+ }
+ else if (strcmp(opt, "-objc-selectors") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCSelectors;
+ }
+ 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, "-versions") == 0) {
+ }
+ 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 {
+ }
+ else if (strcmp(opt, "-vmaddr") == 0) {
+ options.printVMAddrs = true;
+ }
+ else {
fprintf(stderr, "Error: unrecognized option %s\n", opt);
usage();
exit(1);
}
- }
- else {
+ }
+ 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 ) {
- 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);
- }
- }
-
- struct stat statbuf;
- if ( ::stat(sharedCachePath, &statbuf) == -1 ) {
- fprintf(stderr, "Error: stat() failed for dyld shared cache at %s, errno=%d\n", sharedCachePath, errno);
- exit(1);
- }
-
- int cache_fd = ::open(sharedCachePath, O_RDONLY);
- if ( cache_fd < 0 ) {
- fprintf(stderr, "Error: open() failed for shared cache file at %s, errno=%d\n", sharedCachePath, errno);
- exit(1);
- }
- options.mappedCache = ::mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, cache_fd, 0);
- if (options.mappedCache == MAP_FAILED) {
- fprintf(stderr, "Error: mmap() for shared cache at %s failed, errno=%d\n", sharedCachePath, errno);
- exit(1);
- }
-
- if ( options.mode == modeSlideInfo ) {
- 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>* dataMapping = &mappings[1];
- uint64_t dataStartAddress = dataMapping->address();
- uint64_t dataSize = dataMapping->size();
- const dyldCacheSlideInfo<LittleEndian>* slideInfoHeader = (dyldCacheSlideInfo<LittleEndian>*)((char*)options.mappedCache+header->slideInfoOffset());
- printf("slide info version=%d\n", slideInfoHeader->version());
- 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 ( 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");
- }
- printf("image count: %u\n", header->imagesCount());
- 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 %lluMB\n", mappings[i].size()/(1024*1024));
- else if ( mappings[i]. init_prot() & VM_PROT_WRITE )
- printf(" __DATA %lluMB\n", mappings[i].size()/(1024*1024));
- else if ( mappings[i].init_prot() & VM_PROT_READ )
- printf(" __LINKEDIT %lluMB\n", mappings[i].size()/(1024*1024));
- }
- }
- else {
- segment_callback_t callback;
- 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 modeNone:
- case modeInfo:
- case modeSlideInfo:
- break;
- }
- }
- else if ( strcmp((char*)options.mappedCache, "dyld_v1 x86_64") == 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 modeNone:
- case modeInfo:
- case modeSlideInfo:
- break;
- }
- }
- else if ( (strncmp((char*)options.mappedCache, "dyld_v1 armv", 14) == 0)
- || (strncmp((char*)options.mappedCache, "dyld_v1 armv", 13) == 0) ) {
- 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 modeNone:
- case modeInfo:
- case modeSlideInfo:
- break;
- }
- }
- 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, statbuf.st_size,
- ^(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);
- }
- }
-
- 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;
+
+ 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;
+ if ( sharedCachePath != nullptr ) {
+ dyldCache = mapCacheFile(sharedCachePath);
+ // mapCacheFile prints an error if something goes wrong, so just return in that case.
+ if ( dyldCache == nullptr )
+ return 1;
+ }
+ else {
+#if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101300)
+ size_t cacheLength;
+ dyldCache = (DyldSharedCache*)_dyld_get_shared_cache_range(&cacheLength);
+#endif
+ if (dyldCache == nullptr) {
+ fprintf(stderr, "Could not get in-memory shared cache\n");
+ return 1;
+ }
+ if ( options.mode == modeObjCClasses ) {
+ fprintf(stderr, "Cannot use -objc-info with a live cache. Please run with a path to an on-disk cache file\n");
+ return 1;
+ }
+ }
+
+ if ( options.mode == modeSlideInfo || options.mode == modeVerboseSlideInfo ) {
+ const dyld_cache_header* header = &dyldCache->header;
+ if ( header->slideInfoOffset == 0 ) {
+ fprintf(stderr, "Error: dyld shared cache does not contain slide info\n");
+ exit(1);
+ }
+ const dyld_cache_mapping_info* mappings = (const dyld_cache_mapping_info*)((char*)dyldCache + header->mappingOffset);
+ const dyld_cache_mapping_info* dataMapping = &mappings[1];
+ uint64_t dataStartAddress = dataMapping->address;
+ uint64_t dataSize = dataMapping->size;
+
+ const dyld_cache_slide_info* slideInfoHeader = dyldCache->slideInfo();
+ 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 dyld_cache_slide_info_entry* entries = (dyld_cache_slide_info_entry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset);
+ const uint16_t* tocs = (uint16_t*)((char*)slideInfoHeader + slideInfoHeader->toc_offset);
+ for(int i=0; i < slideInfoHeader->toc_count; ++i) {
+ printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, tocs[i]);
+ const dyld_cache_slide_info_entry* entry = &entries[tocs[i]];
+ for(int j=0; j < slideInfoHeader->entries_size; ++j)
+ printf("%02X", entry->bits[j]);
+ printf("\n");
+ }
+ }
+ else if ( slideInfoHeader->version == 2 ) {
+ const dyld_cache_slide_info2* slideInfo = (dyld_cache_slide_info2*)(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 = 0x%016llX\n", i, (uint64_t)(pageOffset), (uint64_t)rawValue, (uint64_t)value);
+ pageOffset += delta;
+ }
+ };
+ const uint8_t* dataPagesStart = dyldCache->dataRegionStart();
+ 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 dyld_cache_slide_info3* slideInfo = (dyld_cache_slide_info3*)(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 uintptr_t authValueAdd = (uintptr_t)(slideInfo->auth_value_add);
+ const uint8_t* dataSegmentStart = dyldCache->dataRegionStart();
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ uint16_t delta = slideInfo->page_starts[i];
+ if ( delta == DYLD_CACHE_SLIDE_V3_PAGE_ATTR_NO_REBASE ) {
+ printf("page[% 5d]: no rebasing\n", i);
+ continue;
+ }
+
+ printf("page[% 5d]: start=0x%04X\n", i, delta);
+ if ( options.mode != modeVerboseSlideInfo )
+ continue;
+
+ delta = delta/sizeof(uint64_t); // initial offset is byte based
+ const uint8_t* pageStart = dataSegmentStart + (i * slideInfo->page_size);
+ const dyld_cache_slide_pointer3* loc = (dyld_cache_slide_pointer3*)pageStart;
+ do {
+ loc += delta;
+ delta = loc->plain.offsetToNextPointer;
+ dyld3::MachOLoaded::ChainedFixupPointerOnDisk ptr;
+ ptr.raw64 = *((uint64_t*)loc);
+ if ( loc->auth.authenticated ) {
+ uint64_t target = authValueAdd + loc->auth.offsetFromSharedCacheBase;
+ uint64_t targetValue = ptr.arm64e.signPointer((void*)loc, target);
+ printf(" [% 5d + 0x%04llX]: 0x%016llX (JOP: diversity %d, address %s, %s)\n",
+ i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue,
+ ptr.arm64e.authBind.diversity, ptr.arm64e.authBind.addrDiv ? "true" : "false",
+ ptr.arm64e.keyName());
+ }
+ else {
+ uint64_t targetValue = ptr.arm64e.unpackTarget();
+ printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)((const uint8_t*)loc - 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 = dyldCache->dataRegionStart();
+ 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);
+ }
+ }
+ }
+ }
+ }
+ else if ( options.mode == modeInfo ) {
+ const dyld_cache_header* header = &dyldCache->header;
+ 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("cache type: %s\n", header->cacheType ? "production" : "development");
+ printf("image count: %u\n", header->imagesCount);
+ if ( (header->mappingOffset >= 0x78) && (header->branchPoolsOffset != 0) ) {
+ printf("branch pool count: %u\n", header->branchPoolsCount);
+ }
+ if ( header->slideInfoSize > 0 ) {
+ uint32_t pageSize = 0x4000; // fix me for intel
+ uint32_t possibleSlideValues = (uint32_t)(header->maxSlide/pageSize);
+ uint32_t entropyBits = 32 - __builtin_clz(possibleSlideValues - 1);
+ printf("ASLR entropy: %u-bits\n", entropyBits);
+ }
+ printf("mappings:\n");
+ const dyld_cache_mapping_info* mappings = (const dyld_cache_mapping_info*)((char*)dyldCache + header->mappingOffset);
+ for (uint32_t i=0; i < header->mappingCount; ++i) {
+ if ( mappings[i].initProt & 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].fileOffset, mappings[i].fileOffset + mappings[i].size,
+ mappings[i].address, mappings[i].address + mappings[i].size);
+ else if ( mappings[i].initProt & 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].fileOffset, mappings[i].fileOffset + mappings[i].size,
+ mappings[i].address, mappings[i].address + mappings[i].size);
+ else if ( mappings[i].initProt & 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].fileOffset, mappings[i].fileOffset + mappings[i].size,
+ mappings[i].address, mappings[i].address + mappings[i].size);
+ }
+ if ( header->codeSignatureOffset != 0 ) {
+ uint64_t size = header->codeSignatureSize;
+ 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 dyld_cache_header* header = &dyldCache->header;
+ if ( (header->mappingOffset < sizeof(dyld_cache_header)) || (header->accelerateInfoSize == 0) ) {
+ printf("no accelerator info\n");
+ }
+ else {
+ const dyld_cache_mapping_info* mappings = (const dyld_cache_mapping_info*)((char*)dyldCache + header->mappingOffset);
+ uint64_t aiAddr = header->accelerateInfoAddr;
+ const dyld_cache_accelerator_info* 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].fileOffset;
+ accelInfo = (dyld_cache_accelerator_info*)((uint8_t*)dyldCache + offset);
+ }
+ }
+ if ( accelInfo == NULL ) {
+ printf("accelerator info not in any mapped range\n");
+ }
+ else {
+ const dyld_cache_image_info* images = (dyld_cache_image_info*)((char*)dyldCache + header->imagesOffset);
+ const dyld_cache_image_info_extra* imagesExtra = (dyld_cache_image_info_extra*)((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*)dyldCache +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 dyld_cache_accelerator_initializer* initializers = (dyld_cache_accelerator_initializer*)((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 dyld_cache_accelerator_dof* dofs = (dyld_cache_accelerator_dof*)((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*)dyldCache + images[imageIndex].pathFileOffset);
+ else
+ printf(" image[%3u] BAD INDEX\n", imageIndex);
+ }
+ printf("range table (count=%u):\n", accelInfo->rangeTableCount);
+ const dyld_cache_range_entry* rangeTable = (dyld_cache_range_entry*)((char*)accelInfo + accelInfo->rangeTableOffset);
+ for (uint32_t i=0; i < accelInfo->rangeTableCount; ++i) {
+ const dyld_cache_range_entry& entry = rangeTable[i];
+ printf(" 0x%llX -> 0x%llX %s\n", entry.startAddress, entry.startAddress + entry.size, (char*)dyldCache + 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 dyld_cache_header* header = &dyldCache->header;
+ if ( (header->mappingOffset < sizeof(dyld_cache_header)) || (header->imagesTextCount == 0) ) {
+ printf("no text info\n");
+ }
+ else {
+ const dyld_cache_image_text_info* imagesText = (dyld_cache_image_text_info*)((char*)dyldCache + header->imagesTextOffset);
+ const dyld_cache_image_text_info* imagesTextEnd = &imagesText[header->imagesTextCount];
+ printf("dylib text infos (count=%llu):\n", header->imagesTextCount);
+ for (const dyld_cache_image_text_info* 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*)dyldCache + p->pathOffset);
+ }
+ }
+ }
+ else if ( options.mode == modeLocalSymbols ) {
+ const dyld_cache_header* header = &dyldCache->header;
+ if ( header->localSymbolsOffset == 0 ) {
+ fprintf(stderr, "Error: dyld shared cache does not contain local symbols info\n");
+ exit(1);
+ }
+ const bool is64 = (strstr((char*)dyldCache, "64") != NULL);
+ const dyld_cache_image_info* imageInfos = (dyld_cache_image_info*)((char*)dyldCache + header->imagesOffset);
+ const dyld_cache_local_symbols_info* localsInfo = (dyld_cache_local_symbols_info*)((char*)dyldCache + 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 dyld_cache_local_symbols_entry* entries = (dyld_cache_local_symbols_entry*)((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*)dyldCache + stringsFileOffset;
+ for (int i=0; i < entriesCount; ++i) {
+ const char* imageName = (char*)dyldCache + 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*)dyldCache + 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 == modeJSONMap ) {
+ std::string buffer = dyldCache->generateJSONMap("unknown");
+ printf("%s\n", buffer.c_str());
+ }
+ else if ( options.mode == modeJSONDependents ) {
+ std::cout << dyldCache->generateJSONDependents();
+ }
+ 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 == modeSectionSizes ) {
+ __block std::map<std::string, uint64_t> sectionSizes;
+ dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+ ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo §Info, bool malformedSectionRange, bool &stop) {
+ std::string section = std::string(sectInfo.segInfo.segName) + " " + sectInfo.sectName;
+ sectionSizes[section] += sectInfo.sectSize;
+ });
+ });
+ for (const auto& keyAndValue : sectionSizes) {
+ printf("%lld %s\n", keyAndValue.second, keyAndValue.first.c_str());
+ }
+ }
+ else if ( options.mode == modeObjCProtocols ) {
+ if ( dyldCache->objcOpt() == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc\n");
+ return 1;
+ }
+ objc_opt::objc_protocolopt2_t* protocols = dyldCache->objcOpt()->protocolopt2();
+ if ( protocols == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc protocols\n");
+ return 1;
+ }
+
+ for (uint64_t index = 0; index != protocols->capacity; ++index) {
+ const objc_opt::objc_classheader_t& clshi = protocols->classOffsets()[index];
+ if ( clshi.clsOffset == 0 ) {
+ fprintf(stderr, "[% 5lld]\n", index);
+ continue;
+ }
+ const char* name = (const char*)(((const uint8_t*)protocols) + protocols->offsets()[index]);
+ if ( !clshi.isDuplicate() ) {
+ fprintf(stderr, "[% 5lld] -> (% 8d, % 8d) = %s\n", index, clshi.clsOffset, clshi.hiOffset, name);
+ continue;
+ }
+
+ // class appears in more than one header
+ uint32_t count = clshi.duplicateCount();
+ fprintf(stderr, "[% 5lld] -> duplicates [% 5d..% 5d] = %s\n",
+ index, clshi.duplicateIndex(), clshi.duplicateIndex() + clshi.duplicateCount() - 1, name);
+
+ const objc_opt::objc_classheader_t *list = &protocols->duplicateOffsets()[clshi.duplicateIndex()];
+ for (uint32_t i = 0; i < count; i++) {
+ fprintf(stderr, " - [% 5lld] -> (% 8d, % 8d)\n", (uint64_t)(clshi.duplicateIndex() + i), list[i].clsOffset, list[i].hiOffset);
+ }
+ }
+ }
+ else if ( options.mode == modeObjCClasses ) {
+ using dyld3::json::Node;
+ using ObjCClassInfo = dyld3::MachOAnalyzer::ObjCClassInfo;
+ const bool rebased = false;
+
+ // Build a map of class vm addrs to their names so that categories know the
+ // name of the class they are attaching to
+ __block std::map<uint64_t, const char*> classVMAddrToName;
+ __block std::map<uint64_t, const char*> metaclassVMAddrToName;
+ dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+ const uint32_t pointerSize = ma->pointerSize();
+
+ auto visitClass = ^(Diagnostics& diag, uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass) {
+ dyld3::MachOAnalyzer::PrintableStringResult classNameResult;
+ const char* className = ma->getPrintableString(objcClass.nameVMAddr(pointerSize), classNameResult);
+ if (classNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ if (isMetaClass)
+ metaclassVMAddrToName[classVMAddr] = className;
+ else
+ classVMAddrToName[classVMAddr] = className;
+ };
+
+ Diagnostics diag;
+ ma->forEachObjCClass(diag, rebased, visitClass);
+ });
+
+ // These are used only for the on-disk binaries we analyze
+ __block std::vector<const char*> onDiskChainedFixupBindTargets;
+ __block std::map<uint64_t, const char*> onDiskClassVMAddrToName;
+ __block std::map<uint64_t, const char*> onDiskMetaclassVMAddrToName;
+
+ __block Node root;
+ auto makeNode = [](std::string str) -> Node {
+ Node node;
+ node.value = str;
+ return node;
+ };
+
+ auto getProperties = ^(const dyld3::MachOAnalyzer* ma, uint64_t propertiesVMAddr) {
+ __block Node propertiesNode;
+ auto visitProperty = ^(uint64_t propertyVMAddr, const dyld3::MachOAnalyzer::ObjCProperty& property) {
+ // Get the name
+ dyld3::MachOAnalyzer::PrintableStringResult propertyNameResult;
+ const char* propertyName = ma->getPrintableString(property.nameVMAddr, propertyNameResult);
+ if (propertyNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ // Get the attributes
+ dyld3::MachOAnalyzer::PrintableStringResult propertyAttributesResult;
+ const char* propertyAttributes = ma->getPrintableString(property.attributesVMAddr, propertyAttributesResult);
+ if (propertyAttributesResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ Node propertyNode;
+ propertyNode.map["name"] = makeNode(propertyName);
+ propertyNode.map["attributes"] = makeNode(propertyAttributes);
+ propertiesNode.array.push_back(propertyNode);
+ };
+ ma->forEachObjCProperty(propertiesVMAddr, rebased, visitProperty);
+ return propertiesNode.array.empty() ? std::optional<Node>() : propertiesNode;
+ };
+
+ auto getClasses = ^(const dyld3::MachOAnalyzer* ma) {
+ Diagnostics diag;
+ const uint32_t pointerSize = ma->pointerSize();
+
+ __block Node classesNode;
+ __block bool skippedPreviousClass = false;
+ auto visitClass = ^(Diagnostics& diag, uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass) {
+ if (isMetaClass) {
+ if (skippedPreviousClass) {
+ // If the class was bad, then skip the meta class too
+ skippedPreviousClass = false;
+ return;
+ }
+ } else {
+ skippedPreviousClass = true;
+ }
+
+ std::string classType = "-";
+ if (isMetaClass)
+ classType = "+";
+ dyld3::MachOAnalyzer::PrintableStringResult classNameResult;
+ const char* className = ma->getPrintableString(objcClass.nameVMAddr(pointerSize), classNameResult);
+ if (classNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint) {
+ return;
+ }
+
+ const char* superClassName = nullptr;
+ if ( ma->inDyldCache() ) {
+ if ( objcClass.superclassVMAddr != 0 ) {
+ if (isMetaClass) {
+ // If we are root class, then our superclass should actually point to our own class
+ const uint32_t RO_ROOT = (1<<1);
+ if ( objcClass.flags(pointerSize) & RO_ROOT ) {
+ auto it = classVMAddrToName.find(objcClass.superclassVMAddr);
+ assert(it != classVMAddrToName.end());
+ superClassName = it->second;
+ } else {
+ auto it = metaclassVMAddrToName.find(objcClass.superclassVMAddr);
+ assert(it != metaclassVMAddrToName.end());
+ superClassName = it->second;
+ }
+ } else {
+ auto it = classVMAddrToName.find(objcClass.superclassVMAddr);
+ assert(it != classVMAddrToName.end());
+ superClassName = it->second;
+ }
+ }
+ } else {
+ // On-disk binary. Lets crack the chain to work out what we are pointing at
+ dyld3::MachOAnalyzer::ChainedFixupPointerOnDisk fixup;
+ fixup.raw64 = objcClass.superclassVMAddr;
+ assert(!fixup.arm64e.authBind.auth);
+ if (fixup.arm64e.bind.bind) {
+ // Bind to another image. Use the bind table to work out which name to bind to
+ const char* symbolName = onDiskChainedFixupBindTargets[fixup.arm64e.bind.ordinal];
+ if (isMetaClass) {
+ if ( strstr(symbolName, "_OBJC_METACLASS_$_") == symbolName ) {
+ superClassName = symbolName + strlen("_OBJC_METACLASS_$_");
+ } else {
+ // Swift classes don't start with these prefixes so just skip them
+ if (objcClass.isSwiftLegacy || objcClass.isSwiftStable)
+ return;
+ }
+ } else {
+ if ( strstr(symbolName, "_OBJC_CLASS_$_") == symbolName ) {
+ superClassName = symbolName + strlen("_OBJC_CLASS_$_");
+ } else {
+ // Swift classes don't start with these prefixes so just skip them
+ if (objcClass.isSwiftLegacy || objcClass.isSwiftStable)
+ return;
+ }
+ }
+ } else {
+ // Rebase within this image.
+ if (isMetaClass) {
+ auto it = onDiskMetaclassVMAddrToName.find(objcClass.superclassVMAddr);
+ assert(it != onDiskMetaclassVMAddrToName.end());
+ superClassName = it->second;
+ } else {
+ auto it = onDiskClassVMAddrToName.find(objcClass.superclassVMAddr);
+ assert(it != onDiskClassVMAddrToName.end());
+ superClassName = it->second;
+ }
+ }
+ }
+
+ // Print the methods on this class
+ __block Node methodsNode;
+ auto visitMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method) {
+ dyld3::MachOAnalyzer::PrintableStringResult methodNameResult;
+ const char* methodName = ma->getPrintableString(method.nameVMAddr, methodNameResult);
+ if (methodNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+ methodsNode.array.push_back(makeNode(classType + methodName));
+ };
+ ma->forEachObjCMethod(objcClass.baseMethodsVMAddr(pointerSize), rebased,
+ visitMethod);
+
+ std::optional<Node> properties = getProperties(ma, objcClass.basePropertiesVMAddr(pointerSize));
+
+ if (isMetaClass) {
+ assert(!classesNode.array.empty());
+ Node& currentClassNode = classesNode.array.back();
+ assert(currentClassNode.map["className"].value == className);
+ if (!methodsNode.array.empty()) {
+ Node& currentMethodsNode = currentClassNode.map["methods"];
+ currentMethodsNode.array.insert(currentMethodsNode.array.end(),
+ methodsNode.array.begin(),
+ methodsNode.array.end());
+ }
+ if (properties.has_value()) {
+ Node& currentPropertiesNode = currentClassNode.map["properties"];
+ currentPropertiesNode.array.insert(currentPropertiesNode.array.end(),
+ properties->array.begin(),
+ properties->array.end());
+ }
+ return;
+ }
+
+ Node currentClassNode;
+ currentClassNode.map["className"] = makeNode(className);
+ if ( superClassName != nullptr )
+ currentClassNode.map["superClassName"] = makeNode(superClassName);
+ if (!methodsNode.array.empty())
+ currentClassNode.map["methods"] = methodsNode;
+ if (properties.has_value())
+ currentClassNode.map["properties"] = properties.value();
+
+ // We didn't skip this class so mark it as such
+ skippedPreviousClass = false;
+
+ classesNode.array.push_back(currentClassNode);
+ };
+
+ ma->forEachObjCClass(diag, rebased, visitClass);
+ return classesNode.array.empty() ? std::optional<Node>() : classesNode;
+ };
+
+ auto getCategories = ^(const dyld3::MachOAnalyzer* ma) {
+ Diagnostics diag;
+
+ __block Node categoriesNode;
+ auto visitCategory = ^(Diagnostics& diag, uint64_t categoryVMAddr,
+ const dyld3::MachOAnalyzer::ObjCCategory& objcCategory) {
+ dyld3::MachOAnalyzer::PrintableStringResult categoryNameResult;
+ const char* categoryName = ma->getPrintableString(objcCategory.nameVMAddr, categoryNameResult);
+ if (categoryNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ const char* className = nullptr;
+ if ( ma->inDyldCache() ) {
+ auto it = classVMAddrToName.find(objcCategory.clsVMAddr);
+ assert(it != classVMAddrToName.end());
+ className = it->second;
+ } else {
+ // On-disk binary. Lets crack the chain to work out what we are pointing at
+ dyld3::MachOAnalyzer::ChainedFixupPointerOnDisk fixup;
+ fixup.raw64 = objcCategory.clsVMAddr;
+ assert(!fixup.arm64e.authBind.auth);
+ if (fixup.arm64e.bind.bind) {
+ // Bind to another image. Use the bind table to work out which name to bind to
+ const char* symbolName = onDiskChainedFixupBindTargets[fixup.arm64e.bind.ordinal];
+ if ( strstr(symbolName, "_OBJC_CLASS_$_") == symbolName ) {
+ className = symbolName + strlen("_OBJC_CLASS_$_");
+ } else {
+ // Swift classes don't start with these prefixes so just skip them
+ // We don't know that this is a Swift class/category though, but skip it anyway
+ return;
+ }
+ } else {
+ auto it = onDiskClassVMAddrToName.find(objcCategory.clsVMAddr);
+ if (it == onDiskClassVMAddrToName.end()) {
+ // This is an odd binary with perhaps a Swift class. Just skip this entry
+ return;
+ }
+ className = it->second;
+ }
+ }
+
+ // Print the instance methods on this category
+ __block Node methodsNode;
+ auto visitInstanceMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method) {
+ dyld3::MachOAnalyzer::PrintableStringResult methodNameResult;
+ const char* methodName = ma->getPrintableString(method.nameVMAddr, methodNameResult);
+ if (methodNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+ methodsNode.array.push_back(makeNode(std::string("-") + methodName));
+ };
+ ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, rebased,
+ visitInstanceMethod);
+
+ // Print the instance methods on this category
+ __block Node classMethodsNode;
+ auto visitClassMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method) {
+ dyld3::MachOAnalyzer::PrintableStringResult methodNameResult;
+ const char* methodName = ma->getPrintableString(method.nameVMAddr, methodNameResult);
+ if (methodNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+ methodsNode.array.push_back(makeNode(std::string("+") + methodName));
+ };
+ ma->forEachObjCMethod(objcCategory.classMethodsVMAddr, rebased,
+ visitClassMethod);
+
+ Node currentCategoryNode;
+ currentCategoryNode.map["categoryName"] = makeNode(categoryName);
+ currentCategoryNode.map["className"] = makeNode(className);
+ if (!methodsNode.array.empty())
+ currentCategoryNode.map["methods"] = methodsNode;
+ if (std::optional<Node> properties = getProperties(ma, objcCategory.instancePropertiesVMAddr))
+ currentCategoryNode.map["properties"] = properties.value();
+
+ categoriesNode.array.push_back(currentCategoryNode);
+ };
+
+ ma->forEachObjCCategory(diag, rebased, visitCategory);
+ return categoriesNode.array.empty() ? std::optional<Node>() : categoriesNode;
+ };
+
+ dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+
+ Node imageRecord;
+ imageRecord.map["imagePath"] = makeNode(installName);
+ imageRecord.map["imageType"] = makeNode("cache-dylib");
+ std::optional<Node> classes = getClasses(ma);
+ std::optional<Node> categories = getCategories(ma);
+
+ // Skip emitting images with no objc data
+ if (!classes.has_value() && !categories.has_value())
+ return;
+ if (classes.has_value())
+ imageRecord.map["classes"] = classes.value();
+ if (categories.has_value())
+ imageRecord.map["categories"] = categories.value();
+
+ root.array.push_back(imageRecord);
+ });
+
+ FileSystemPhysical fileSystem;
+ dyld3::Platform platform = dyldCache->platform();
+ const dyld3::GradedArchs& archs = dyld3::GradedArchs::forName(dyldCache->archName(), true);
+
+ dyldCache->forEachLaunchClosure(^(const char *executableRuntimePath, const dyld3::closure::LaunchClosure *closure) {
+ Diagnostics diag;
+ char realerPath[MAXPATHLEN];
+ dyld3::closure::LoadedFileInfo loadedFileInfo = dyld3::MachOAnalyzer::load(diag, fileSystem, executableRuntimePath, archs, platform, realerPath);
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)loadedFileInfo.fileContent;
+ uint32_t pointerSize = ma->pointerSize();
+
+ // Populate the bind targets for classes from other images
+ onDiskChainedFixupBindTargets.clear();
+ ma->forEachChainedFixupTarget(diag, ^(int libOrdinal, const char* symbolName, uint64_t addend, bool weakImport, bool& stop) {
+ onDiskChainedFixupBindTargets.push_back(symbolName);
+ });
+ if ( diag.hasError() )
+ return;
+
+ // Populate the rebase targets for class names
+ onDiskMetaclassVMAddrToName.clear();
+ onDiskClassVMAddrToName.clear();
+ auto visitClass = ^(Diagnostics& diag, uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass) {
+ dyld3::MachOAnalyzer::PrintableStringResult classNameResult;
+ const char* className = ma->getPrintableString(objcClass.nameVMAddr(pointerSize), classNameResult);
+ if (classNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ if (isMetaClass)
+ onDiskMetaclassVMAddrToName[classVMAddr] = className;
+ else
+ onDiskClassVMAddrToName[classVMAddr] = className;
+ };
+
+ ma->forEachObjCClass(diag, rebased, visitClass);
+
+ Node imageRecord;
+ imageRecord.map["imagePath"] = makeNode(executableRuntimePath);
+ imageRecord.map["imageType"] = makeNode("executable");
+ std::optional<Node> classes = getClasses(ma);
+ std::optional<Node> categories = getCategories(ma);
+
+ // Skip emitting images with no objc data
+ if (!classes.has_value() && !categories.has_value())
+ return;
+ if (classes.has_value())
+ imageRecord.map["classes"] = classes.value();
+ if (categories.has_value())
+ imageRecord.map["categories"] = categories.value();
+
+ root.array.push_back(imageRecord);
+ });
+
+ dyldCache->forEachDlopenImage(^(const char *runtimePath, const dyld3::closure::Image *image) {
+ Diagnostics diag;
+ char realerPath[MAXPATHLEN];
+ dyld3::closure::LoadedFileInfo loadedFileInfo = dyld3::MachOAnalyzer::load(diag, fileSystem, runtimePath, archs, platform, realerPath);
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)loadedFileInfo.fileContent;
+ uint32_t pointerSize = ma->pointerSize();
+
+ // Populate the bind targets for classes from other images
+ onDiskChainedFixupBindTargets.clear();
+ ma->forEachChainedFixupTarget(diag, ^(int libOrdinal, const char* symbolName, uint64_t addend, bool weakImport, bool& stop) {
+ onDiskChainedFixupBindTargets.push_back(symbolName);
+ });
+ if ( diag.hasError() )
+ return;
+
+ // Populate the rebase targets for class names
+ onDiskMetaclassVMAddrToName.clear();
+ onDiskClassVMAddrToName.clear();
+ auto visitClass = ^(Diagnostics& diag, uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass) {
+ dyld3::MachOAnalyzer::PrintableStringResult classNameResult;
+ const char* className = ma->getPrintableString(objcClass.nameVMAddr(pointerSize), classNameResult);
+ if (classNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ if (isMetaClass)
+ onDiskMetaclassVMAddrToName[classVMAddr] = className;
+ else
+ onDiskClassVMAddrToName[classVMAddr] = className;
+ };
+
+ ma->forEachObjCClass(diag, rebased, visitClass);
+
+ Node imageRecord;
+ imageRecord.map["imagePath"] = makeNode(runtimePath);
+ imageRecord.map["imageType"] = makeNode("non-cache-dylib");
+ std::optional<Node> classes = getClasses(ma);
+ std::optional<Node> categories = getCategories(ma);
+
+ // Skip emitting images with no objc data
+ if (!classes.has_value() && !categories.has_value())
+ return;
+ if (classes.has_value())
+ imageRecord.map["classes"] = classes.value();
+ if (categories.has_value())
+ imageRecord.map["categories"] = categories.value();
+
+ root.array.push_back(imageRecord);
+ });
+
+ dyld3::json::printJSON(root, 0, std::cout);
+ }
+ else if ( options.mode == modeObjCSelectors ) {
+ if ( dyldCache->objcOpt() == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc\n");
+ return 1;
+ }
+ const objc_opt::objc_selopt_t* selectors = dyldCache->objcOpt()->selopt();
+ if ( selectors == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc selectors\n");
+ return 1;
+ }
+
+ std::vector<const char*> selNames;
+ for (uint64_t index = 0; index != selectors->capacity; ++index) {
+ objc_opt::objc_stringhash_offset_t offset = selectors->offsets()[index];
+ if ( offset == 0 )
+ continue;
+ const char* selName = selectors->getEntryForIndex((uint32_t)index);
+ selNames.push_back(selName);
+ }
+
+ std::sort(selNames.begin(), selNames.end(),
+ [](const char* a, const char* b) {
+ // Sort by offset, not string value
+ return a < b;
+ });
+
+ auto makeNode = [](std::string str) {
+ dyld3::json::Node node;
+ node.value = str;
+ return node;
+ };
+
+ dyld3::json::Node root;
+ for (const char* selName : selNames) {
+ dyld3::json::Node selNode;
+ selNode.map["selectorName"] = makeNode(selName);
+ selNode.map["offset"] = makeNode(dyld3::json::decimal((uint64_t)selName - (uint64_t)dyldCache));
+
+ root.array.push_back(selNode);
+ }
+
+ dyld3::json::printJSON(root, 0, std::cout);
+ }
+ 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, '/');
+ // The bundle is at a different location on device. Its /usr/lib/dsc_extractor.bundle in the SDK
+ // but /usr/local/lib/dsc_extractor.bundle on device.
+ strcpy(last+1, DSC_BUNDLE_REL_PATH);
+ 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 {
+ switch ( options.mode ) {
+ case modeList: {
+ if (options.printInodes) {
+ dyldCache->forEachImageEntry(^(const char* path, uint64_t mTime, uint64_t inode) {
+ printf("0x%08llX 0x%08llX ", inode, mTime);
+ if ( isAlias(path, dyldCache) )
+ printf("[alias] %s\n", path);
+ else
+ printf("%s\n", path);
+ });
+ } else {
+ dyldCache->forEachImageTextSegment(^(uint64_t loadAddressUnslid, uint64_t textSegmentSize, const unsigned char *dylibUUID, const char *installName, bool &stop) {
+ if ( options.printVMAddrs )
+ printf("0x%08llX ", loadAddressUnslid);
+ if ( options.printUUIDs ) {
+ const uint8_t* uuid = (uint8_t*)dylibUUID;
+ 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]);
+ }
+ if ( isAlias(installName, dyldCache) )
+ printf("[alias] %s\n", installName);
+ else
+ printf("%s\n", installName);
+ });
+ }
+ break;
+ }
+ case modeMap: {
+ __block std::map<uint64_t, const char*> dataSegNames;
+ __block std::map<uint64_t, uint64_t> dataSegEnds;
+ dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
+ dyld3::MachOFile* mf = (dyld3::MachOFile*)mh;
+ mf->forEachSegment(^(const dyld3::MachOAnalyzer::SegmentInfo &info, bool &stop) {
+ if ( isAlias(installName, dyldCache) )
+ return;
+ printf("0x%08llX - 0x%08llX %s %s\n", info.vmAddr, info.vmAddr + info.vmSize, info.segName, installName);
+ if ( strncmp(info.segName, "__DATA", 6) == 0 ) {
+ dataSegNames[info.vmAddr] = installName;
+ dataSegEnds[info.vmAddr] = info.vmAddr + info.vmSize;
+ }
+ });
+ });
+ // <rdar://problem/51084507> Enhance dyld_shared_cache_util to show where section alignment added padding
+ uint64_t lastEnd = 0;
+ for (const auto& entry : dataSegEnds) {
+ uint64_t padding = entry.first - lastEnd;
+ if ( (padding > 32) && (lastEnd != 0) ) {
+ printf("0x%08llX - 0x%08llX PADDING %lluKB\n", lastEnd, entry.first, padding/1024);
+ }
+ lastEnd = entry.second;
+ }
+ break;
+ }
+ case modeDependencies: {
+ __block bool dependentTargetFound = false;
+ dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
+ if ( strcmp(options.dependentsOfPath, installName) != 0 )
+ return;
+ dependentTargetFound = true;
+
+ auto printDep = [&options](const char *loadPath, uint32_t compatVersion, uint32_t curVersion) {
+ if ( options.printDylibVersions ) {
+ uint32_t compat_vers = compatVersion;
+ uint32_t current_vers = curVersion;
+ printf("\t%s", loadPath);
+ 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", loadPath);
+ }
+ };
+
+ dyld3::MachOFile* mf = (dyld3::MachOFile*)mh;
+
+ // First print out our dylib and version.
+ const char* dylibInstallName;
+ uint32_t currentVersion;
+ uint32_t compatVersion;
+ if ( mf->getDylibInstallName(&dylibInstallName, &compatVersion, ¤tVersion) ) {
+ printDep(dylibInstallName, compatVersion, currentVersion);
+ }
+
+ // Then the dependent dylibs.
+ mf->forEachDependentDylib(^(const char *loadPath, bool isWeak, bool isReExport, bool isUpward, uint32_t compatVersion, uint32_t curVersion, bool &stop) {
+ printDep(loadPath, compatVersion, curVersion);
+ });
+ });
+ if (options.dependentsOfPath && !dependentTargetFound) {
+ fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", options.dependentsOfPath, sharedCachePath);
+ exit(1);
+ }
+ break;
+ }
+ case modeLinkEdit: {
+ std::map<uint32_t, const char*> pageToContent;
+ auto add_linkedit = [&pageToContent](uint32_t pageStart, uint32_t pageEnd, const char* message) {
+ for (uint32_t p = pageStart; p <= pageEnd; p += 4096) {
+ std::map<uint32_t, const char*>::iterator pos = pageToContent.find(p);
+ if ( pos == pageToContent.end() ) {
+ pageToContent[p] = strdup(message);
+ }
+ else {
+ const char* oldMessage = pos->second;
+ char* newMesssage;
+ asprintf(&newMesssage, "%s, %s", oldMessage, message);
+ pageToContent[p] = newMesssage;
+ ::free((void*)oldMessage);
+ }
+ }
+ };
+
+ dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
+ // Filter out symlinks.
+ if (isAlias(installName, dyldCache))
+ return;
+ dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
+ Diagnostics diag;
+ dyld3::MachOAnalyzer::LinkEditInfo leInfo;
+ ma->getLinkEditPointers(diag, leInfo);
+
+ if (diag.hasError())
+ return;
+
+ char message[1000];
+ const char* shortName = strrchr(installName, '/') + 1;
+ // add export trie info
+ if ( leInfo.dyldInfo->export_size != 0 ) {
+ //printf("export_off=0x%X\n", leInfo.dyldInfo->export_off());
+ uint32_t exportPageOffsetStart = leInfo.dyldInfo->export_off & (-4096);
+ uint32_t exportPageOffsetEnd = (leInfo.dyldInfo->export_off + leInfo.dyldInfo->export_size) & (-4096);
+ sprintf(message, "exports from %s", shortName);
+ add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message);
+ }
+ // add binding info
+ if ( leInfo.dyldInfo->bind_size != 0 ) {
+ uint32_t bindPageOffsetStart = leInfo.dyldInfo->bind_off & (-4096);
+ uint32_t bindPageOffsetEnd = (leInfo.dyldInfo->bind_off + leInfo.dyldInfo->bind_size) & (-4096);
+ sprintf(message, "bindings from %s", shortName);
+ add_linkedit(bindPageOffsetStart, bindPageOffsetEnd, message);
+ }
+ // add lazy binding info
+ if ( leInfo.dyldInfo->lazy_bind_size != 0 ) {
+ uint32_t lazybindPageOffsetStart = leInfo.dyldInfo->lazy_bind_off & (-4096);
+ uint32_t lazybindPageOffsetEnd = (leInfo.dyldInfo->lazy_bind_off + leInfo.dyldInfo->lazy_bind_size) & (-4096);
+ sprintf(message, "lazy bindings from %s", shortName);
+ add_linkedit(lazybindPageOffsetStart, lazybindPageOffsetEnd, message);
+ }
+ // add weak binding info
+ if ( leInfo.dyldInfo->weak_bind_size != 0 ) {
+ uint32_t weakbindPageOffsetStart = leInfo.dyldInfo->weak_bind_off & (-4096);
+ uint32_t weakbindPageOffsetEnd = (leInfo.dyldInfo->weak_bind_off + leInfo.dyldInfo->weak_bind_size) & (-4096);
+ sprintf(message, "weak bindings from %s", shortName);
+ add_linkedit(weakbindPageOffsetStart, weakbindPageOffsetEnd, message);
+ }
+ });
+
+ for (std::map<uint32_t, const char*>::iterator it = pageToContent.begin(); it != pageToContent.end(); ++it) {
+ printf("0x%08X %s\n", it->first, it->second);
+ }
+ break;
+ }
+ case modeSize: {
+ struct TextInfo {
+ uint64_t textSize;
+ const char* path;
+ };
+ __block std::vector<TextInfo> textSegments;
+ dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
+ // Filter out symlinks.
+ if (isAlias(installName, dyldCache))
+ return;
+
+ dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
+ ma->forEachSegment(^(const dyld3::MachOAnalyzer::SegmentInfo &info, bool &stop) {
+ if ( strcmp(info.segName, "__TEXT") != 0 )
+ return;
+ textSegments.push_back({ info.fileSize, installName });
+ });
+ });
+ std::sort(textSegments.begin(), textSegments.end(), [](const TextInfo& left, const TextInfo& right) {
+ return (left.textSize > right.textSize);
+ });
+ for (std::vector<TextInfo>::iterator it = textSegments.begin(); it != textSegments.end(); ++it) {
+ printf(" 0x%08llX %s\n", it->textSize, it->path);
+ }
+ break;
+ }
+ case modeNone:
+ case modeInfo:
+ case modeSlideInfo:
+ case modeVerboseSlideInfo:
+ case modeAcceleratorInfo:
+ case modeTextInfo:
+ case modeLocalSymbols:
+ case modeJSONMap:
+ case modeJSONDependents:
+ case modeSectionSizes:
+ case modeStrings:
+ case modeObjCProtocols:
+ case modeObjCClasses:
+ case modeObjCSelectors:
+ case modeExtract:
+ break;
+ }
+ }
+ return 0;
}
+