+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2009-2010 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <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 <vector>
+#include <map>
+#include <set>
+
+#include "dsc_iterator.h"
+#include "dyld_cache_format.h"
+#include "Architectures.hpp"
+#include "MachOFileAbstraction.hpp"
+#include "CacheFileAbstraction.hpp"
+
+
+#define OP_NULL 0
+#define OP_LIST_DEPENDENCIES 1
+#define OP_LIST_DYLIBS 2
+#define OP_LIST_LINKEDIT 3
+
+#define UUID_BYTES 16
+
+// Define this here so we can work with or without block support
+typedef void (*segment_callback_t)(const char* dylib, const char* segName, uint64_t offset, uint64_t sizem,
+ uint64_t mappedddress, uint64_t slide, void* userData);
+
+struct seg_callback_args {
+ char *target_path;
+ uint32_t target_found;
+ void *mapped_cache;
+ uint32_t op;
+ uint8_t print_uuids;
+ uint8_t print_vmaddrs;
+ uint8_t print_dylib_versions;
+};
+
+void usage() {
+ fprintf(stderr, "Usage: dscutil -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit [ 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 __ppc__
+ return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME "rosetta";
+#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";
+#else
+ #error unsupported architecture
+#endif
+}
+
+/*
+ * Get a vector of all the load commands from the header pointed to by headerAddr
+ */
+template <typename A>
+std::vector<macho_load_command<typename A::P>* > get_load_cmds(void *headerAddr) {
+ typedef typename A::P P;
+ typedef typename A::P::E E;
+
+ std::vector<macho_load_command<P>* > cmd_vector;
+
+ const macho_header<P>* mh = (const macho_header<P>*)headerAddr;
+ 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++) {
+ cmd_vector.push_back((macho_load_command<P>*)cmd);
+ cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
+ }
+ return cmd_vector;
+}
+
+/*
+ * List dependencies from the mach-o header at headerAddr
+ * in the same format as 'otool -L'
+ */
+template <typename A>
+void list_dependencies(const char *dylib, void *headerAddr, uint8_t print_dylib_versions) {
+ typedef typename A::P P;
+ typedef typename A::P::E E;
+
+ std::vector< macho_load_command<P>* > cmds;
+ cmds = get_load_cmds<A>(headerAddr);
+ for(typename std::vector<macho_load_command<P>*>::iterator it = cmds.begin(); it != cmds.end(); ++it) {
+ uint32_t cmdType = (*it)->cmd();
+ if (cmdType == LC_LOAD_DYLIB ||
+ cmdType == LC_ID_DYLIB ||
+ cmdType == LC_LOAD_WEAK_DYLIB ||
+ cmdType == LC_REEXPORT_DYLIB ||
+ cmdType == LC_LOAD_UPWARD_DYLIB) {
+ macho_dylib_command<P>* dylib_cmd = (macho_dylib_command<P>*)*it;
+ const char *name = dylib_cmd->name();
+ uint32_t compat_vers = dylib_cmd->compatibility_version();
+ uint32_t current_vers = dylib_cmd->current_version();
+
+ if (print_dylib_versions) {
+ printf("\t%s (compatibility version %u.%u.%u, current version %u.%u.%u)\n",
+ name,
+ (compat_vers >> 16),
+ (compat_vers >> 8) & 0xff,
+ (compat_vers) & 0xff,
+ (current_vers >> 16),
+ (current_vers >> 8) & 0xff,
+ (current_vers) & 0xff);
+ } else {
+ printf("\t%s\n", name);
+ }
+ }
+ }
+}
+
+/*
+ * Print out a dylib from the shared cache, optionally including the UUID
+ */
+template <typename A>
+void print_dylib(const char *dylib, void *headerAddr, uint64_t slide, struct seg_callback_args *args) {
+ typedef typename A::P P;
+ typedef typename A::P::E E;
+ char uuid_str[UUID_BYTES*3];
+ uint8_t got_uuid = 0;
+ uint64_t vmaddr = 0;
+
+ std::vector< macho_load_command<P>* > cmds;
+ cmds = get_load_cmds<A>(headerAddr);
+ for(typename std::vector<macho_load_command<P>*>::iterator it = cmds.begin(); it != cmds.end(); ++it) {
+ uint32_t cmdType = (*it)->cmd();
+ if (cmdType == LC_UUID) {
+ macho_uuid_command<P>* uuid_cmd = (macho_uuid_command<P>*)*it;
+ const uint8_t *uuid = uuid_cmd->uuid();
+ sprintf(uuid_str, "<%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]);
+ got_uuid = 1;
+ }
+ else if (cmdType == LC_SEGMENT) {
+ macho_segment_command<P>* seg_cmd = (macho_segment_command<P>*)*it;
+ if (strcmp(seg_cmd->segname(), "__TEXT") == 0) {
+ vmaddr = seg_cmd->vmaddr();
+ }
+ }
+ }
+
+ if (args->print_vmaddrs)
+ printf("0x%08llX ", vmaddr+slide);
+ if (args->print_uuids) {
+ if (got_uuid)
+ printf("%s ", uuid_str);
+ else
+ printf("< no uuid in dylib > ");
+ }
+ printf("%s\n", dylib);
+}
+
+
+uint64_t sLinkeditBase = 0;
+std::map<uint32_t, char*> sPageToContent;
+
+
+
+
+static void add_linkedit(uint32_t pageStart, uint32_t pageEnd, char* message)
+{
+ for (uint32_t p = pageStart; p <= pageEnd; p += 4096) {
+ std::map<uint32_t, char*>::iterator pos = sPageToContent.find(p);
+ if ( pos == sPageToContent.end() ) {
+ sPageToContent[p] = strdup(message);
+ }
+ else {
+ char* oldMessage = pos->second;
+ char* newMesssage;
+ asprintf(&newMesssage, "%s, %s", oldMessage, message);
+ sPageToContent[p] = newMesssage;
+ free(oldMessage);
+ }
+ }
+}
+
+
+/*
+ * get LINKEDIT info for dylib
+ */
+template <typename A>
+void process_linkedit(const char* dylib, void* headerAddr) {
+ typedef typename A::P P;
+ typedef typename A::P::E E;
+ // filter out symlinks by only handling first path found for each mach header
+ static std::set<void*> seenImages;
+ if ( seenImages.count(headerAddr) != 0 )
+ return;
+ seenImages.insert(headerAddr);
+ const macho_header<P>* mh = (const macho_header<P>*)headerAddr;
+ 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(dylib, '/') + 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);
+ }
+ // 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);
+ }
+ // 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);
+ }
+ // 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);
+ }
+ }
+ cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
+ }
+}
+
+
+
+/*
+ * This callback is used with dsc_iterator, and called once for each segment in the target shared cache
+ */
+template <typename A>
+void segment_callback(const char *dylib, const char *segName, uint64_t offset, uint64_t sizem,
+ uint64_t mappedAddress, uint64_t slide, void *userData) {
+ typedef typename A::P P;
+ typedef typename A::P::E E;
+ struct seg_callback_args *args = (struct seg_callback_args *)userData;
+ if (strncmp(segName, "__TEXT", 6) == 0) {
+ int target_match = args->target_path ? (strcmp(args->target_path, dylib) == 0) : 0;
+ if (!args->target_path || target_match) {
+ if (target_match) {
+ args->target_found = 1;
+ }
+ void *headerAddr = (void*)((long)args->mapped_cache + (long)offset);
+ switch (args->op) {
+ case OP_LIST_DEPENDENCIES:
+ list_dependencies<A>(dylib, headerAddr, args->print_dylib_versions);
+ break;
+ case OP_LIST_DYLIBS:
+ print_dylib<A>(dylib, headerAddr, slide, args);
+ break;
+ case OP_LIST_LINKEDIT:
+ process_linkedit<A>(dylib, headerAddr);
+ default:
+ break;
+ }
+ }
+ }
+ else if (strncmp(segName, "__LINKEDIT", 6) == 0) {
+ sLinkeditBase = mappedAddress - offset;
+ }
+}
+
+
+
+
+int main (int argc, char **argv) {
+ struct seg_callback_args args;
+ const char *shared_cache_path = NULL;
+ void *mapped_cache;
+ struct stat statbuf;
+ int cache_fd;
+ char c;
+ bool print_slide_info = false;
+
+ args.target_path = NULL;
+ args.op = OP_NULL;
+ args.print_uuids = 0;
+ args.print_vmaddrs = 0;
+ args.print_dylib_versions = 0;
+ args.target_found = 0;
+
+ for (uint32_t optind = 1; optind < argc; optind++) {
+ char *opt = argv[optind];
+ if (opt[0] == '-') {
+ if (strcmp(opt, "-list") == 0) {
+ if (args.op) {
+ fprintf(stderr, "Error: select one of -list or -dependents\n");
+ usage();
+ exit(1);
+ }
+ args.op = OP_LIST_DYLIBS;
+ } else if (strcmp(opt, "-dependents") == 0) {
+ if (args.op) {
+ fprintf(stderr, "Error: select one of -list or -dependents\n");
+ usage();
+ exit(1);
+ }
+ if (!(++optind < argc)) {
+ fprintf(stderr, "Error: option -depdendents requires an argument\n");
+ usage();
+ exit(1);
+ }
+ args.op = OP_LIST_DEPENDENCIES;
+ args.target_path = argv[optind];
+ } else if (strcmp(opt, "-uuid") == 0) {
+ args.print_uuids = 1;
+ } else if (strcmp(opt, "-versions") == 0) {
+ args.print_dylib_versions = 1;
+ } else if (strcmp(opt, "-vmaddr") == 0) {
+ args.print_vmaddrs = 1;
+ } else if (strcmp(opt, "-linkedit") == 0) {
+ args.op = OP_LIST_LINKEDIT;
+ } else if (strcmp(opt, "-slide_info") == 0) {
+ print_slide_info = true;
+ } else {
+ fprintf(stderr, "Error: unrecognized option %s\n", opt);
+ usage();
+ exit(1);
+ }
+ } else {
+ shared_cache_path = opt;
+ }
+ }
+
+ if ( !print_slide_info ) {
+ if (args.op == OP_NULL) {
+ fprintf(stderr, "Error: select one of -list or -dependents\n");
+ usage();
+ exit(1);
+ }
+
+ if (args.print_uuids && args.op != OP_LIST_DYLIBS)
+ fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n");
+ if (args.print_vmaddrs && args.op != OP_LIST_DYLIBS)
+ fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n");
+ if (args.print_dylib_versions && args.op != OP_LIST_DEPENDENCIES)
+ fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n");
+
+ if (args.op == OP_LIST_DEPENDENCIES && !args.target_path) {
+ fprintf(stderr, "Error: -dependents given, but no dylib path specified\n");
+ usage();
+ exit(1);
+ }
+ }
+
+ if (!shared_cache_path)
+ shared_cache_path = default_shared_cache_path();
+
+ if (stat(shared_cache_path, &statbuf)) {
+ fprintf(stderr, "Error: stat failed for dyld shared cache at %s\n", shared_cache_path);
+ exit(1);
+ }
+
+ cache_fd = open(shared_cache_path, O_RDONLY);
+ if (cache_fd < 0) {
+ fprintf(stderr, "Error: failed to open shared cache file at %s\n", shared_cache_path);
+ exit(1);
+ }
+ mapped_cache = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, cache_fd, 0);
+ if (mapped_cache == MAP_FAILED) {
+ fprintf(stderr, "Error: mmap() for shared cache at %s failed, errno=%d\n", shared_cache_path, errno);
+ exit(1);
+ }
+
+ if ( print_slide_info ) {
+ const dyldCacheHeader<LittleEndian>* header = (dyldCacheHeader<LittleEndian>*)mapped_cache;
+ if ( (strcmp(header->magic(), "dyld_v1 x86_64") != 0)
+ && (strcmp(header->magic(), "dyld_v1 armv6") != 0)
+ && (strcmp(header->magic(), "dyld_v1 armv7") != 0) ) {
+ fprintf(stderr, "Error: unrecognized dyld shared cache magic or arch does not support sliding\n");
+ exit(1);
+ }
+ 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*)mapped_cache + 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*)mapped_cache+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 {
+ segment_callback_t callback;
+ if ( strcmp((char*)mapped_cache, "dyld_v1 i386") == 0 )
+ callback = segment_callback<x86>;
+ else if ( strcmp((char*)mapped_cache, "dyld_v1 x86_64") == 0 )
+ callback = segment_callback<x86_64>;
+ else if ( strcmp((char*)mapped_cache, "dyld_v1 ppc") == 0 )
+ callback = segment_callback<ppc>;
+ else if ( strcmp((char*)mapped_cache, "dyld_v1 armv5") == 0 )
+ callback = segment_callback<arm>;
+ else if ( strcmp((char*)mapped_cache, "dyld_v1 armv6") == 0 )
+ callback = segment_callback<arm>;
+ else if ( strcmp((char*)mapped_cache, "dyld_v1 armv7") == 0 )
+ callback = segment_callback<arm>;
+ else {
+ fprintf(stderr, "Error: unrecognized dyld shared cache magic.\n");
+ exit(1);
+ }
+
+ args.mapped_cache = mapped_cache;
+
+ #if __BLOCKS__
+ // Shim to allow building for the host
+ void *argsPtr = &args;
+ dyld_shared_cache_iterate_segments_with_slide(mapped_cache,
+ ^(const char* dylib, const char* segName, uint64_t offset, uint64_t size, uint64_t mappedddress, uint64_t slide ) {
+ (callback)(dylib, segName, offset, size, mappedddress, slide, argsPtr);
+ });
+ #else
+ dyld_shared_cache_iterate_segments_with_slide_nb(mapped_cache, callback, &args);
+ #endif
+
+ if (args.op == OP_LIST_LINKEDIT) {
+ // dump -linkedit information
+ for (std::map<uint32_t, char*>::iterator it = sPageToContent.begin(); it != sPageToContent.end(); ++it) {
+ printf("0x%0llX %s\n", sLinkeditBase+it->first, it->second);
+ }
+ }
+
+
+ if (args.target_path && !args.target_found) {
+ fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", args.target_path, shared_cache_path);
+ exit(1);
+ }
+ }
+ return 0;
+}
projects / apple / dyld.git / commitdiff
