dyld_shared_cache_util.cpp [plain text]
#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h>
#include <string.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/syslimits.h>
#include <mach-o/arch.h>
#include <mach-o/loader.h>
#include <mach-o/dyld.h>
#include <mach-o/dyld_priv.h>
#include <mach/mach.h>
#include <map>
#include <vector>
#include "DyldSharedCache.h"
#include "dsc_iterator.h"
#include "dsc_extractor.h"
#include "dyld_cache_format.h"
#include "Architectures.hpp"
#include "MachOFileAbstraction.hpp"
#include "CacheFileAbstraction.hpp"
#include "Trie.hpp"
#include "SupportedArchs.h"
enum Mode {
modeNone,
modeList,
modeMap,
modeDependencies,
modeSlideInfo,
modeVerboseSlideInfo,
modeAcceleratorInfo,
modeTextInfo,
modeLinkEdit,
modeLocalSymbols,
modeStrings,
modeInfo,
modeSize,
modeExtract
};
struct Options {
Mode mode;
const char* dependentsOfPath;
const void* mappedCache;
const char* extractionDir;
bool printUUIDs;
bool printVMAddrs;
bool printDylibVersions;
bool printInodes;
};
struct TextInfo {
uint64_t textSize;
const char* path;
};
struct TextInfoSorter {
bool operator()(const TextInfo& left, const TextInfo& right) {
return (left.textSize > right.textSize);
}
};
struct Results {
std::map<uint32_t, const char*> pageToContent;
uint64_t linkeditBase;
bool dependentTargetFound;
std::vector<TextInfo> textSegments;
};
static const DyldSharedCache* mapCacheFile(const char* path, size_t& cacheLength)
{
struct stat statbuf;
if ( ::stat(path, &statbuf) ) {
fprintf(stderr, "Error: stat failed for dyld shared cache at %s\n", path);
return nullptr;
}
int cache_fd = ::open(path, O_RDONLY);
if (cache_fd < 0) {
fprintf(stderr, "Error: failed to open shared cache file at %s\n", path);
return nullptr;
}
uint8_t firstPage[4096];
if ( ::pread(cache_fd, firstPage, 4096, 0) != 4096 ) {
fprintf(stderr, "Error: failed to read shared cache file at %s\n", path);
return nullptr;
}
const dyld_cache_header* header = (dyld_cache_header*)firstPage;
const dyld_cache_mapping_info* mappings = (dyld_cache_mapping_info*)(firstPage + header->mappingOffset);
size_t vmSize = (size_t)(mappings[2].address + mappings[2].size - mappings[0].address);
vm_address_t result;
kern_return_t r = ::vm_allocate(mach_task_self(), &result, vmSize, VM_FLAGS_ANYWHERE);
if ( r != KERN_SUCCESS ) {
fprintf(stderr, "Error: failed to allocate space to load shared cache file at %s\n", path);
return nullptr;
}
for (int i=0; i < 3; ++i) {
void* mapped_cache = ::mmap((void*)(result + mappings[i].address - mappings[0].address), (size_t)mappings[i].size,
PROT_READ, MAP_FIXED | MAP_PRIVATE, cache_fd, mappings[i].fileOffset);
if (mapped_cache == MAP_FAILED) {
fprintf(stderr, "Error: mmap() for shared cache at %s failed, errno=%d\n", path, errno);
return nullptr;
}
}
::close(cache_fd);
cacheLength = statbuf.st_size;
return (DyldSharedCache*)result;
}
void usage() {
fprintf(stderr, "Usage: dyld_shared_cache_util -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit | -map | -slide_info | -verbose_slide_info | -info | -extract <dylib-dir> [ shared-cache-file ] \n");
}
#if __x86_64__
static bool isHaswell()
{
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
mach_port_t hostPort = mach_host_self();
kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count);
mach_port_deallocate(mach_task_self(), hostPort);
if ( result != KERN_SUCCESS )
return false;
return ( info.cpu_subtype == CPU_SUBTYPE_X86_64_H );
}
#endif
static const char* default_shared_cache_path() {
#if __i386__
return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "i386";
#elif __x86_64__
if ( isHaswell() )
return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64h";
else
return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "x86_64";
#elif __ARM_ARCH_5TEJ__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv5";
#elif __ARM_ARCH_6K__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv6";
#elif __ARM_ARCH_7K__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7k";
#elif __ARM_ARCH_7A__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7";
#elif __ARM_ARCH_7F__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7f";
#elif __ARM_ARCH_7S__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "armv7s";
#elif __ARM64_ARCH_8_32__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64_32";
#elif __arm64e__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64e";
#elif __arm64__
return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "arm64";
#else
#error unsupported architecture
#endif
}
typedef void (*segment_callback_t)(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
const Options& options, Results& results);
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;
}
template <typename A>
void print_list(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
const Options& options, Results& results)
{
if ( strcmp(segInfo->name, "__TEXT") != 0 )
return;
if ( options.printVMAddrs )
printf("0x%08llX ", segInfo->address);
if ( options.printInodes )
printf("0x%08llX 0x%08llX ", dylibInfo->inode, dylibInfo->modTime);
if ( options.printUUIDs ) {
if ( dylibInfo->uuid != NULL ) {
const uint8_t* uuid = (uint8_t*)dylibInfo->uuid;;
printf("<%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X> ",
uuid[0], uuid[1], uuid[2], uuid[3],
uuid[4], uuid[5], uuid[6], uuid[7],
uuid[8], uuid[9], uuid[10], uuid[11],
uuid[12], uuid[13], uuid[14], uuid[15]);
}
else
printf("< no uuid in dylib > ");
}
if ( dylibInfo->isAlias )
printf("[alias] %s\n", dylibInfo->path);
else
printf("%s\n", dylibInfo->path);
}
template <typename A>
void collect_size(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo,
const Options& options, Results& results)
{
if ( strcmp(segInfo->name, "__TEXT") != 0 )
return;
if ( dylibInfo->isAlias )
return;
TextInfo info;
info.textSize = segInfo->fileSize;
info.path = dylibInfo->path;
results.textSegments.push_back(info);
}
static void add_linkedit(uint32_t pageStart, uint32_t pageEnd, const char* message, Results& results)
{
for (uint32_t p = pageStart; p <= pageEnd; p += 4096) {
std::map<uint32_t, const char*>::iterator pos = results.pageToContent.find(p);
if ( pos == results.pageToContent.end() ) {
results.pageToContent[p] = strdup(message);
}
else {
const char* oldMessage = pos->second;
char* newMesssage;
asprintf(&newMesssage, "%s, %s", oldMessage, message);
results.pageToContent[p] = newMesssage;
::free((void*)oldMessage);
}
}
}
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;
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;
if ( dyldInfo->export_size() != 0 ) {
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);
}
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);
}
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);
}
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());
}
}
template <typename A>
void print_map(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo, const Options& options, Results& results) {
if ( !dylibInfo->isAlias )
printf("0x%08llX - 0x%08llX %s %s\n", segInfo->address, segInfo->address + segInfo->fileSize, segInfo->name, dylibInfo->path);
}
static void checkMode(Mode mode) {
if ( mode != modeNone ) {
fprintf(stderr, "Error: select one of: -list, -dependents, -info, -slide_info, -verbose_slide_info, -linkedit, -map, -extract, or -size\n");
usage();
exit(1);
}
}
int main (int argc, const char* argv[]) {
const char* sharedCachePath = default_shared_cache_path();
Options options;
options.mode = modeNone;
options.printUUIDs = false;
options.printVMAddrs = false;
options.printDylibVersions = false;
options.printInodes = false;
options.dependentsOfPath = NULL;
options.extractionDir = NULL;
bool printStrings = false;
bool printExports = false;
for (uint32_t i = 1; i < argc; i++) {
const char* opt = argv[i];
if (opt[0] == '-') {
if (strcmp(opt, "-list") == 0) {
checkMode(options.mode);
options.mode = modeList;
}
else if (strcmp(opt, "-dependents") == 0) {
checkMode(options.mode);
options.mode = modeDependencies;
options.dependentsOfPath = argv[++i];
if ( i >= argc ) {
fprintf(stderr, "Error: option -depdendents requires an argument\n");
usage();
exit(1);
}
}
else if (strcmp(opt, "-linkedit") == 0) {
checkMode(options.mode);
options.mode = modeLinkEdit;
}
else if (strcmp(opt, "-info") == 0) {
checkMode(options.mode);
options.mode = modeInfo;
}
else if (strcmp(opt, "-slide_info") == 0) {
checkMode(options.mode);
options.mode = modeSlideInfo;
}
else if (strcmp(opt, "-verbose_slide_info") == 0) {
checkMode(options.mode);
options.mode = modeVerboseSlideInfo;
}
else if (strcmp(opt, "-accelerator_info") == 0) {
checkMode(options.mode);
options.mode = modeAcceleratorInfo;
}
else if (strcmp(opt, "-text_info") == 0) {
checkMode(options.mode);
options.mode = modeTextInfo;
}
else if (strcmp(opt, "-local_symbols") == 0) {
checkMode(options.mode);
options.mode = modeLocalSymbols;
}
else if (strcmp(opt, "-strings") == 0) {
if (options.mode != modeStrings)
checkMode(options.mode);
options.mode = modeStrings;
printStrings = true;
}
else if (strcmp(opt, "-exports") == 0) {
if (options.mode != modeStrings)
checkMode(options.mode);
options.mode = modeStrings;
printExports = true;
}
else if (strcmp(opt, "-map") == 0) {
checkMode(options.mode);
options.mode = modeMap;
}
else if (strcmp(opt, "-size") == 0) {
checkMode(options.mode);
options.mode = modeSize;
}
else if (strcmp(opt, "-extract") == 0) {
checkMode(options.mode);
options.mode = modeExtract;
options.extractionDir = argv[++i];
if ( i >= argc ) {
fprintf(stderr, "Error: option -extract requires a directory argument\n");
usage();
exit(1);
}
}
else if (strcmp(opt, "-uuid") == 0) {
options.printUUIDs = true;
}
else if (strcmp(opt, "-inode") == 0) {
options.printInodes = true;
}
else if (strcmp(opt, "-versions") == 0) {
options.printDylibVersions = true;
}
else if (strcmp(opt, "-vmaddr") == 0) {
options.printVMAddrs = true;
}
else {
fprintf(stderr, "Error: unrecognized option %s\n", opt);
usage();
exit(1);
}
}
else {
sharedCachePath = opt;
}
}
if ( options.mode == modeNone ) {
fprintf(stderr, "Error: select one of -list, -dependents, -info, -linkedit, or -map\n");
usage();
exit(1);
}
if ( options.mode != modeSlideInfo && options.mode != modeVerboseSlideInfo ) {
if ( options.printUUIDs && (options.mode != modeList) )
fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n");
if ( options.printVMAddrs && (options.mode != modeList) )
fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n");
if ( options.printDylibVersions && (options.mode != modeDependencies) )
fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n");
if ( (options.mode == modeDependencies) && (options.dependentsOfPath == NULL) ) {
fprintf(stderr, "Error: -dependents given, but no dylib path specified\n");
usage();
exit(1);
}
}
const DyldSharedCache* dyldCache = nullptr;
bool dyldCacheIsLive = true;
size_t cacheLength = 0;
if ( sharedCachePath != nullptr ) {
dyldCache = mapCacheFile(sharedCachePath, cacheLength);
dyldCacheIsLive = false;
}
else {
#if __MAC_OS_X_VERSION_MIN_REQUIRED && (__MAC_OS_X_VERSION_MIN_REQUIRED < 101300)
fprintf(stderr, "this tool needs to run on macOS 10.13 or later\n");
return 1;
#else
dyldCache = (DyldSharedCache*)_dyld_get_shared_cache_range(&cacheLength);
#endif
}
options.mappedCache = dyldCache;
if ( options.mode == modeSlideInfo || options.mode == modeVerboseSlideInfo ) {
const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
if ( header->slideInfoOffset() == 0 ) {
fprintf(stderr, "Error: dyld shared cache does not contain slide info\n");
exit(1);
}
const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset());
const dyldCacheFileMapping<LittleEndian>* textMapping = &mappings[0];
const dyldCacheFileMapping<LittleEndian>* dataMapping = &mappings[1];
const dyldCacheFileMapping<LittleEndian>* linkEditMapping = &mappings[2];
uint64_t dataStartAddress = dataMapping->address();
uint64_t dataSize = dataMapping->size();
uint64_t slideInfoMappedOffset = (header->slideInfoOffset()-linkEditMapping->file_offset()) + (linkEditMapping->address() - textMapping->address());
const dyldCacheSlideInfo<LittleEndian>* slideInfoHeader = (dyldCacheSlideInfo<LittleEndian>*)((char*)options.mappedCache+slideInfoMappedOffset);
printf("slide info version=%d\n", slideInfoHeader->version());
if ( slideInfoHeader->version() == 1 ) {
printf("toc_count=%d, data page count=%lld\n", slideInfoHeader->toc_count(), dataSize/4096);
const dyldCacheSlideInfoEntry* entries = (dyldCacheSlideInfoEntry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset());
for(int i=0; i < slideInfoHeader->toc_count(); ++i) {
printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, slideInfoHeader->toc(i));
const dyldCacheSlideInfoEntry* entry = &entries[slideInfoHeader->toc(i)];
for(int j=0; j < slideInfoHeader->entries_size(); ++j)
printf("%02X", entry->bits[j]);
printf("\n");
}
}
else if ( slideInfoHeader->version() == 2 ) {
const dyldCacheSlideInfo2<LittleEndian>* slideInfo = (dyldCacheSlideInfo2<LittleEndian>*)(slideInfoHeader);
printf("page_size=%d\n", slideInfo->page_size());
printf("delta_mask=0x%016llX\n", slideInfo->delta_mask());
printf("value_add=0x%016llX\n", slideInfo->value_add());
printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count(), slideInfo->page_extras_count());
const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset());
const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset());
for (int i=0; i < slideInfo->page_starts_count(); ++i) {
const uint16_t start = starts[i];
auto rebaseChain = [&](uint8_t* pageContent, uint16_t startOffset)
{
uintptr_t slideAmount = 0;
const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask());
const uintptr_t valueMask = ~deltaMask;
const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add());
const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
uint32_t pageOffset = startOffset;
uint32_t delta = 1;
while ( delta != 0 ) {
uint8_t* loc = pageContent + pageOffset;
uintptr_t rawValue = *((uintptr_t*)loc);
delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
uintptr_t value = (rawValue & valueMask);
if ( value != 0 ) {
value += valueAdd;
value += slideAmount;
}
printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)(pageOffset), (uint64_t)rawValue);
pageOffset += delta;
}
};
const uint8_t* dataPagesStart = (uint8_t*)((char*)options.mappedCache + dataMapping->file_offset());
if ( start == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE ) {
printf("page[% 5d]: no rebasing\n", i);
}
else if ( start & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
printf("page[% 5d]: ", i);
int j=(start & 0x3FFF);
bool done = false;
do {
uint16_t aStart = extras[j];
printf("start=0x%04X ", aStart & 0x3FFF);
if ( options.mode == modeVerboseSlideInfo ) {
uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size()*i));
uint16_t pageStartOffset = (aStart & 0x3FFF)*4;
rebaseChain(page, pageStartOffset);
}
done = (extras[j] & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
++j;
} while ( !done );
printf("\n");
}
else {
printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
if ( options.mode == modeVerboseSlideInfo ) {
uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size()*i));
uint16_t pageStartOffset = start*4;
rebaseChain(page, pageStartOffset);
}
}
}
}
else if ( slideInfoHeader->version() == 3 ) {
const dyldCacheSlideInfo3<LittleEndian>* slideInfo = (dyldCacheSlideInfo3<LittleEndian>*)(slideInfoHeader);
printf("page_size=%d\n", slideInfo->page_size());
printf("page_starts_count=%d\n", slideInfo->page_starts_count());
printf("auth_value_add=0x%016llX\n", slideInfo->auth_value_add());
const uint8_t* dataSegmentStart = (uint8_t*)((char*)options.mappedCache + dataMapping->file_offset());
for (int i=0; i < slideInfo->page_starts_count(); ++i) {
const uint16_t start = slideInfo->page_starts(i);
if ( start == 0xFFFF ) {
printf("page[% 5d]: no rebasing\n", i);
}
else {
printf("page[% 5d]: start=0x%04X\n", i, start);
if ( options.mode == modeVerboseSlideInfo ) {
typedef Pointer64<LittleEndian> P;
typedef typename P::uint_t pint_t;
const uint8_t* pageStart = dataSegmentStart + (i * slideInfo->page_size());
pint_t delta = start;
const uint8_t* rebaseLocation = pageStart;
do {
rebaseLocation += delta;
pint_t value = (pint_t)P::getP(*(uint64_t*)rebaseLocation);
delta = ( (value & 0x3FF8000000000000) >> 51) * sizeof(pint_t);
uint64_t top8Bits = value & 0x007F80000000000ULL;
uint64_t bottom43Bits = value & 0x000007FFFFFFFFFFULL;
uint64_t targetValue = ( top8Bits << 13 ) | (((intptr_t)(bottom43Bits << 21) >> 21) & 0x00FFFFFFFFFFFFFF);
printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)(rebaseLocation - pageStart), targetValue);
} while (delta != 0);
}
}
}
}
else if ( slideInfoHeader->version() == 4 ) {
const dyld_cache_slide_info4* slideInfo = (dyld_cache_slide_info4*)(slideInfoHeader);
printf("page_size=%d\n", slideInfo->page_size);
printf("delta_mask=0x%016llX\n", slideInfo->delta_mask);
printf("value_add=0x%016llX\n", slideInfo->value_add);
printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count, slideInfo->page_extras_count);
const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
for (int i=0; i < slideInfo->page_starts_count; ++i) {
const uint16_t start = starts[i];
auto rebaseChainV4 = [&](uint8_t* pageContent, uint16_t startOffset)
{
uintptr_t slideAmount = 0;
const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
const uintptr_t valueMask = ~deltaMask;
const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
uint32_t pageOffset = startOffset;
uint32_t delta = 1;
while ( delta != 0 ) {
uint8_t* loc = pageContent + pageOffset;
uint32_t rawValue = *((uint32_t*)loc);
delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
uintptr_t value = (rawValue & valueMask);
if ( (value & 0xFFFF8000) == 0 ) {
}
else if ( (value & 0x3FFF8000) == 0x3FFF8000 ) {
value |= 0xC0000000;
}
else {
value += valueAdd;
value += slideAmount;
}
printf(" [% 5d + 0x%04X]: 0x%08X\n", i, pageOffset, rawValue);
pageOffset += delta;
}
};
const uint8_t* dataPagesStart = (uint8_t*)((char*)options.mappedCache + dataMapping->file_offset());
if ( start == DYLD_CACHE_SLIDE4_PAGE_NO_REBASE ) {
printf("page[% 5d]: no rebasing\n", i);
}
else if ( start & DYLD_CACHE_SLIDE4_PAGE_USE_EXTRA ) {
printf("page[% 5d]: ", i);
int j=(start & DYLD_CACHE_SLIDE4_PAGE_INDEX);
bool done = false;
do {
uint16_t aStart = extras[j];
printf("start=0x%04X ", aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX);
if ( options.mode == modeVerboseSlideInfo ) {
uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
uint16_t pageStartOffset = (aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX)*4;
rebaseChainV4(page, pageStartOffset);
}
done = (extras[j] & DYLD_CACHE_SLIDE4_PAGE_EXTRA_END);
++j;
} while ( !done );
printf("\n");
}
else {
printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
if ( options.mode == modeVerboseSlideInfo ) {
uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
uint16_t pageStartOffset = start*4;
rebaseChainV4(page, pageStartOffset);
}
}
}
}
return 0;
}
if ( options.mode == modeInfo ) {
const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
printf("uuid: ");
if ( header->mappingOffset() >= 0x68 ) {
const uint8_t* uuid = header->uuid();
printf("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
uuid[0], uuid[1], uuid[2], uuid[3],
uuid[4], uuid[5], uuid[6], uuid[7],
uuid[8], uuid[9], uuid[10], uuid[11],
uuid[12], uuid[13], uuid[14], uuid[15]);
}
else {
printf("n/a\n");
}
if ( header->mappingOffset() >= 0xE0 ) {
uint32_t platform = *((uint32_t*)(((char*)header) + 0xD8));
uint32_t bitfield = *((uint32_t*)(((char*)header) + 0xDC));
uint32_t simulator = bitfield & 0x200;
uint32_t locallyBuiltCache = bitfield & 0x400;
switch (platform) {
case 1:
printf("platform: macOS\n");
break;
case 2:
if ( simulator )
printf("platform: iOS simulator\n");
else
printf("platform: iOS\n");
break;
case 3:
if ( simulator )
printf("platform: tvOS simulator\n");
else
printf("platform: tvOS\n");
break;
case 4:
if ( simulator )
printf("platform: watchOS simulator\n");
else
printf("platform: watchOS\n");
break;
case 5:
printf("platform: bridgeOS\n");
break;
default:
printf("platform: 0x%08X 0x%08X\n", platform, simulator);
}
printf("built by: %s\n", locallyBuiltCache ? "local machine" : "B&I");
}
printf("image count: %u\n", header->imagesCount());
if ( (header->mappingOffset() >= 0x78) && (header->branchPoolsOffset() != 0) ) {
printf("branch pool count: %u\n", header->branchPoolsCount());
}
printf("mappings:\n");
const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset());
for (uint32_t i=0; i < header->mappingCount(); ++i) {
if ( mappings[i].init_prot() & VM_PROT_EXECUTE )
printf(" __TEXT %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n",
mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(),
mappings[i].address(), mappings[i].address() + mappings[i].size());
else if ( mappings[i]. init_prot() & VM_PROT_WRITE )
printf(" __DATA %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n",
mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(),
mappings[i].address(), mappings[i].address() + mappings[i].size());
else if ( mappings[i].init_prot() & VM_PROT_READ )
printf(" __LINKEDIT %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n",
mappings[i].size()/(1024*1024), mappings[i].file_offset(), mappings[i].file_offset() + mappings[i].size(),
mappings[i].address(), mappings[i].address() + mappings[i].size());
}
if ( header->codeSignatureOffset() != 0 ) {
uint64_t size = cacheLength - header->codeSignatureOffset();
uint64_t csAddr = mappings[header->mappingCount()-1].address() + mappings[header->mappingCount()-1].size();
if ( size != 0 )
printf(" code sign %3lluMB, file offset: 0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n",
size/(1024*1024), header->codeSignatureOffset(), header->codeSignatureOffset() + size, csAddr, csAddr + size);
}
printf("slide info: %4lluKB, file offset: 0x%08llX -> 0x%08llX\n",
header->slideInfoSize()/1024, header->slideInfoOffset(), header->slideInfoOffset() + header->slideInfoSize());
if ( header->localSymbolsOffset() != 0 )
printf("local symbols: %3lluMB, file offset: 0x%08llX -> 0x%08llX\n",
header->localSymbolsSize()/(1024*1024), header->localSymbolsOffset(), header->localSymbolsOffset() + header->localSymbolsSize());
if ( (header->mappingOffset() >= 0x78) && (header->accelerateInfoSize() != 0) )
printf("accelerate tab: %3lluKB, address: 0x%08llX -> 0x%08llX\n",
header->accelerateInfoSize()/1024, header->accelerateInfoAddr(), header->accelerateInfoAddr() + header->accelerateInfoSize());
}
else if ( options.mode == modeAcceleratorInfo ) {
const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
if ( (header->mappingOffset() < sizeof(dyldCacheHeader<LittleEndian>)) || (header->accelerateInfoSize() == 0) ) {
printf("no accelerator info\n");
}
else {
const dyldCacheFileMapping<LittleEndian>* mappings = (dyldCacheFileMapping<LittleEndian>*)((char*)options.mappedCache + header->mappingOffset());
uint64_t aiAddr = header->accelerateInfoAddr();
dyldCacheAcceleratorInfo<LittleEndian>* accelInfo = NULL;
for (uint32_t i=0; i < header->mappingCount(); ++i) {
if ( (mappings[i].address() <= aiAddr) && (aiAddr < mappings[i].address()+mappings[i].size()) ) {
uint64_t offset = aiAddr - mappings[i].address() + mappings[i].file_offset();
accelInfo = (dyldCacheAcceleratorInfo<LittleEndian>*)((uint8_t*)options.mappedCache + offset);
}
}
if ( accelInfo == NULL ) {
printf("accelerator info not in any mapped range\n");
}
else {
const dyldCacheImageInfo<LittleEndian>* images = (dyldCacheImageInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesOffset());
const dyldCacheImageInfoExtra<LittleEndian>* imagesExtra = (dyldCacheImageInfoExtra<LittleEndian>*)((char*)accelInfo + accelInfo->imagesExtrasOffset());
const uint16_t* dependencyArray = (uint16_t*)((char*)accelInfo + accelInfo->depListOffset());
const uint16_t* reExportArray = (uint16_t*)((char*)accelInfo + accelInfo->reExportListOffset());
printf("extra image info (count=%u):\n", accelInfo->imageExtrasCount());
for (uint32_t i=0; i < accelInfo->imageExtrasCount(); ++i) {
printf(" image[%3u] %s:\n", i, (char*)options.mappedCache +images[i].pathFileOffset());
printf(" exports trie: addr=0x%llX, size=0x%08X\n", imagesExtra[i].exportsTrieAddr(), imagesExtra[i].exportsTrieSize());
if ( imagesExtra[i].weakBindingsSize() )
printf(" weak bind info: addr=0x%llX, size=0x%08X\n", imagesExtra[i].weakBindingsAddr(), imagesExtra[i].weakBindingsSize());
printf(" dependents: ");
for (uint32_t d=imagesExtra[i].dependentsStartArrayIndex(); dependencyArray[d] != 0xFFFF; ++d) {
uint16_t depIndex = dependencyArray[d];
if ( depIndex & 0x8000 )
printf(" up(%d) ", depIndex & 0x7FFF);
else
printf(" %d ", depIndex);
}
printf("\n");
printf(" re-exports: ");
for (uint32_t r=imagesExtra[i].reExportsStartArrayIndex(); reExportArray[r] != 0xFFFF; ++r)
printf(" %d ", reExportArray[r]);
printf("\n");
}
printf("libdyld.dylib:\n");
printf(" __dyld section address: 0x%llX\n", accelInfo->dyldSectionAddr());
printf("initializers (count=%u):\n", accelInfo->initializersCount());
const dyldCacheAcceleratorInitializer<LittleEndian>* initializers = (dyldCacheAcceleratorInitializer<LittleEndian>*)((char*)accelInfo + accelInfo->initializersOffset());
for (uint32_t i=0; i < accelInfo->initializersCount(); ++i) {
printf(" image[%3u] 0x%llX\n", initializers[i].imageIndex(), mappings[0].address() + initializers[i].functionOffset());
}
printf("DOF sections (count=%u):\n", accelInfo->dofSectionsCount());
const dyldCacheAcceleratorDOFEntry<LittleEndian>* dofs = (dyldCacheAcceleratorDOFEntry<LittleEndian>*)((char*)accelInfo + accelInfo->dofSectionsOffset());
for (uint32_t i=0; i < accelInfo->dofSectionsCount(); ++i) {
printf(" image[%3u] 0x%llX -> 0x%llX\n", dofs[i].imageIndex(), dofs[i].sectionAddress(), dofs[i].sectionAddress()+dofs[i].sectionSize());
}
printf("bottom up order (count=%u):\n", accelInfo->imageExtrasCount());
const uint16_t* bottomUpArray = (uint16_t*)((char*)accelInfo + accelInfo->bottomUpListOffset());
for (uint32_t i=0; i < accelInfo->imageExtrasCount(); ++i) {
unsigned imageIndex = bottomUpArray[i];
if ( imageIndex < accelInfo->imageExtrasCount() )
printf(" image[%3u] %s\n", imageIndex, (char*)options.mappedCache + images[imageIndex].pathFileOffset());
else
printf(" image[%3u] BAD INDEX\n", imageIndex);
}
printf("range table (count=%u):\n", accelInfo->rangeTableCount());
const dyldCacheAcceleratorRangeEntry<LittleEndian>* rangeTable = (dyldCacheAcceleratorRangeEntry<LittleEndian>*)((char*)accelInfo + accelInfo->rangeTableOffset());
for (uint32_t i=0; i < accelInfo->rangeTableCount(); ++i) {
const dyldCacheAcceleratorRangeEntry<LittleEndian>& entry = rangeTable[i];
printf(" 0x%llX -> 0x%llX %s\n", entry.startAddress(), entry.startAddress() + entry.size(), (char*)options.mappedCache + images[entry.imageIndex()].pathFileOffset());
}
printf("dylib trie (size=%u):\n", accelInfo->dylibTrieSize());
const uint8_t* dylibTrieStart = (uint8_t*)accelInfo + accelInfo->dylibTrieOffset();
const uint8_t* dylibTrieEnd = dylibTrieStart + accelInfo->dylibTrieSize();
std::vector<DylibIndexTrie::Entry> dylibEntries;
if ( !Trie<DylibIndex>::parseTrie(dylibTrieStart, dylibTrieEnd, dylibEntries) )
printf(" malformed dylibs trie\n");
for (const DylibIndexTrie::Entry& x : dylibEntries) {
printf(" image[%3u] %s\n", x.info.index, x.name.c_str());
}
}
}
}
else if ( options.mode == modeTextInfo ) {
const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
if ( (header->mappingOffset() < sizeof(dyldCacheHeader<LittleEndian>)) || (header->imagesTextCount() == 0) ) {
printf("no text info\n");
}
else {
const dyldCacheImageTextInfo<LittleEndian>* imagesText = (dyldCacheImageTextInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesTextOffset());
const dyldCacheImageTextInfo<LittleEndian>* imagesTextEnd = &imagesText[header->imagesTextCount()];
printf("dylib text infos (count=%llu):\n", header->imagesTextCount());
for (const dyldCacheImageTextInfo<LittleEndian>* p=imagesText; p < imagesTextEnd; ++p) {
printf(" 0x%09llX -> 0x%09llX <", p->loadAddress(), p->loadAddress() + p->textSegmentSize());
for (int i=0; i<16; ++i) {
switch (i) {
case 4:
case 6:
case 8:
case 10:
printf("-");
break;
}
printf("%02X", p->uuid()[i]);
}
printf("> %s\n", (char*)options.mappedCache + p->pathOffset());
}
}
}
else if ( options.mode == modeLocalSymbols ) {
const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)options.mappedCache;
if ( header->localSymbolsOffset() == 0 ) {
fprintf(stderr, "Error: dyld shared cache does not contain local symbols info\n");
exit(1);
}
const bool is64 = (strstr((char*)options.mappedCache, "64") != NULL);
const dyldCacheImageInfo<LittleEndian>* imageInfos = (dyldCacheImageInfo<LittleEndian>*)((char*)options.mappedCache + header->imagesOffset());
const dyldCacheLocalSymbolsInfo<LittleEndian>* localsInfo = (dyldCacheLocalSymbolsInfo<LittleEndian>*)((char*)options.mappedCache + header->localSymbolsOffset());
const uint32_t nlistFileOffset = (uint32_t)(header->localSymbolsOffset() + localsInfo->nlistOffset());
const uint32_t nlistCount = localsInfo->nlistCount();
const uint32_t nlistByteSize = is64 ? nlistCount*16 : nlistCount*12;
const uint32_t stringsFileOffset = (uint32_t)(header->localSymbolsOffset() + localsInfo->stringsOffset());
const uint32_t stringsSize = localsInfo->stringsSize();
const uint32_t entriesCount = localsInfo->entriesCount();
const dyldCacheLocalSymbolEntry<LittleEndian>* entries = (dyldCacheLocalSymbolEntry<LittleEndian>*)((char*)localsInfo + localsInfo->entriesOffset());
printf("local symbols nlist array: %3uMB, file offset: 0x%08X -> 0x%08X\n", nlistByteSize/(1024*1024), nlistFileOffset, nlistFileOffset+nlistByteSize);
printf("local symbols string pool: %3uMB, file offset: 0x%08X -> 0x%08X\n", stringsSize/(1024*1024), stringsFileOffset, stringsFileOffset+stringsSize);
printf("local symbols by dylib (count=%d):\n", entriesCount);
for (int i=0; i < entriesCount; ++i) {
const char* imageName = (char*)options.mappedCache + imageInfos[i].pathFileOffset();
printf(" nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", entries[i].nlistStartIndex(), entries[i].nlistCount(), imageName);
#if 0
if ( is64 ) {
const nlist_64* symTab = (nlist_64*)((char*)options.mappedCache + nlistFileOffset);
for (int e=0; e < entries[i].nlistCount(); ++e) {
const nlist_64* entry = &symTab[entries[i].nlistStartIndex()+e];
printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringPool[entry->n_un.n_strx]);
printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
}
}
#endif
}
}
else if ( options.mode == modeStrings ) {
if (printStrings) {
dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
int64_t slide = ma->getSlide();
ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo& info, bool malformedSectionRange, bool& stop) {
if ( ( (info.sectFlags & SECTION_TYPE) == S_CSTRING_LITERALS ) ) {
if ( malformedSectionRange ) {
stop = true;
return;
}
const uint8_t* content = (uint8_t*)(info.sectAddr + slide);
const char* s = (char*)content;
const char* end = s + info.sectSize;
while ( s < end ) {
printf("%s: %s\n", ma->installName(), s);
while (*s != '\0' )
++s;
++s;
}
}
});
});
}
if (printExports) {
dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
uint32_t exportTrieRuntimeOffset;
uint32_t exportTrieSize;
if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) {
const uint8_t* start = (uint8_t*)mh + exportTrieRuntimeOffset;
const uint8_t* end = start + exportTrieSize;
std::vector<ExportInfoTrie::Entry> exports;
if ( !ExportInfoTrie::parseTrie(start, end, exports) ) {
return;
}
for (const ExportInfoTrie::Entry& entry: exports) {
printf("%s: %s\n", ma->installName(), entry.name.c_str());
}
}
});
}
}
else if ( options.mode == modeExtract ) {
char pathBuffer[PATH_MAX];
uint32_t bufferSize = PATH_MAX;
if ( _NSGetExecutablePath(pathBuffer, &bufferSize) != 0 ) {
fprintf(stderr, "Error: could not get path of program\n");
return 1;
}
char* last = strrchr(pathBuffer, '/');
strcpy(last+1, "../../lib/dsc_extractor.bundle");
void* handle = dlopen(pathBuffer, RTLD_LAZY);
if ( handle == NULL ) {
fprintf(stderr, "Error: dsc_extractor.bundle could not be loaded at %s\n", pathBuffer);
return 1;
}
typedef int (*extractor_proc)(const char* shared_cache_file_path, const char* extraction_root_path,
void (^progress)(unsigned current, unsigned total));
extractor_proc proc = (extractor_proc)dlsym(handle, "dyld_shared_cache_extract_dylibs_progress");
if ( proc == NULL ) {
fprintf(stderr, "Error: dsc_extractor.bundle did not have dyld_shared_cache_extract_dylibs_progress symbol\n");
return 1;
}
int result = (*proc)(sharedCachePath, options.extractionDir, ^(unsigned c, unsigned total) { } );
return result;
}
else {
segment_callback_t callback = nullptr;
if ( strcmp((char*)options.mappedCache, "dyld_v1 i386") == 0 ) {
switch ( options.mode ) {
case modeList:
callback = print_list<x86>;
break;
case modeMap:
callback = print_map<x86>;
break;
case modeDependencies:
callback = print_dependencies<x86>;
break;
case modeLinkEdit:
callback = process_linkedit<x86>;
break;
case modeSize:
callback = collect_size<x86>;
break;
case modeNone:
case modeInfo:
case modeSlideInfo:
case modeVerboseSlideInfo:
case modeAcceleratorInfo:
case modeTextInfo:
case modeLocalSymbols:
case modeStrings:
case modeExtract:
break;
}
}
else if ( (strcmp((char*)options.mappedCache, "dyld_v1 x86_64") == 0)
|| (strcmp((char*)options.mappedCache, "dyld_v1 x86_64h") == 0) ) {
switch ( options.mode ) {
case modeList:
callback = print_list<x86_64>;
break;
case modeMap:
callback = print_map<x86_64>;
break;
case modeDependencies:
callback = print_dependencies<x86_64>;
break;
case modeLinkEdit:
callback = process_linkedit<x86_64>;
break;
case modeSize:
callback = collect_size<x86_64>;
break;
case modeNone:
case modeInfo:
case modeSlideInfo:
case modeVerboseSlideInfo:
case modeAcceleratorInfo:
case modeTextInfo:
case modeLocalSymbols:
case modeStrings:
case modeExtract:
break;
}
}
else if ( (strncmp((char*)options.mappedCache, "dyld_v1 armv", 14) == 0)
|| (strncmp((char*)options.mappedCache, "dyld_v1 armv", 13) == 0)
#if SUPPORT_ARCH_arm64_32
|| (strcmp((char*)options.mappedCache, "dyld_v1arm64_32") == 0)
#endif
) {
switch ( options.mode ) {
case modeList:
callback = print_list<arm>;
break;
case modeMap:
callback = print_map<arm>;
break;
case modeDependencies:
callback = print_dependencies<arm>;
break;
case modeLinkEdit:
callback = process_linkedit<arm>;
break;
case modeSize:
callback = collect_size<arm>;
break;
case modeNone:
case modeInfo:
case modeSlideInfo:
case modeVerboseSlideInfo:
case modeAcceleratorInfo:
case modeTextInfo:
case modeLocalSymbols:
case modeStrings:
case modeExtract:
break;
}
}
else if ( (strcmp((char*)options.mappedCache, "dyld_v1 arm64") == 0)
#if SUPPORT_ARCH_arm64e
|| (strcmp((char*)options.mappedCache, "dyld_v1 arm64e") == 0)
#endif
) {
switch ( options.mode ) {
case modeList:
callback = print_list<arm64>;
break;
case modeMap:
callback = print_map<arm64>;
break;
case modeDependencies:
callback = print_dependencies<arm64>;
break;
case modeLinkEdit:
callback = process_linkedit<arm64>;
break;
case modeSize:
callback = collect_size<arm64>;
break;
case modeNone:
case modeInfo:
case modeSlideInfo:
case modeVerboseSlideInfo:
case modeAcceleratorInfo:
case modeTextInfo:
case modeLocalSymbols:
case modeStrings:
case modeExtract:
break;
}
}
#if SUPPORT_ARCH_arm64_32
else if ( (strcmp((char*)options.mappedCache, "dyld_v1arm64_32") == 0) ) {
switch ( options.mode ) {
case modeList:
callback = print_list<arm64_32>;
break;
case modeMap:
callback = print_map<arm64_32>;
break;
case modeDependencies:
callback = print_dependencies<arm64_32>;
break;
case modeLinkEdit:
callback = process_linkedit<arm64_32>;
break;
case modeSize:
callback = collect_size<arm64_32>;
break;
case modeNone:
case modeInfo:
case modeSlideInfo:
case modeVerboseSlideInfo:
case modeAcceleratorInfo:
case modeTextInfo:
case modeLocalSymbols:
case modeStrings:
case modeExtract:
break;
}
}
#endif
else {
fprintf(stderr, "Error: unrecognized dyld shared cache magic.\n");
exit(1);
}
__block Results results;
results.dependentTargetFound = false;
int iterateResult = dyld_shared_cache_iterate(options.mappedCache, (uint32_t)cacheLength,
^(const dyld_shared_cache_dylib_info* dylibInfo, const dyld_shared_cache_segment_info* segInfo ) {
(callback)(dylibInfo, segInfo, options, results);
});
if ( iterateResult != 0 ) {
fprintf(stderr, "Error: malformed shared cache file\n");
exit(1);
}
if ( options.mode == modeLinkEdit ) {
for (std::map<uint32_t, const char*>::iterator it = results.pageToContent.begin(); it != results.pageToContent.end(); ++it) {
printf("0x%08X %s\n", it->first, it->second);
}
}
else if ( options.mode == modeSize ) {
std::sort(results.textSegments.begin(), results.textSegments.end(), TextInfoSorter());
for (std::vector<TextInfo>::iterator it = results.textSegments.begin(); it != results.textSegments.end(); ++it) {
printf(" 0x%08llX %s\n", it->textSize, it->path);
}
}
if ( (options.mode == modeDependencies) && options.dependentsOfPath && !results.dependentTargetFound) {
fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", options.dependentsOfPath, sharedCachePath);
exit(1);
}
}
return 0;
}