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--- dyld/dyld-46.12/src/dyld.cpp
+++ /dev/null
@@ -1,2106 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2004-2006 Apple Computer, 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 <stdint.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/param.h>
-#include <mach/mach_time.h> // mach_absolute_time()
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <mach-o/fat.h>
-#include <mach-o/loader.h>
-#include <libkern/OSByteOrder.h>
-#include <mach/mach.h>
-#include <sys/sysctl.h>
-
-#include <vector>
-
-#include "mach-o/dyld_gdb.h"
-
-#include "dyld.h"
-#include "ImageLoader.h"
-#include "ImageLoaderMachO.h"
-#include "dyldLibSystemThreadHelpers.h"
-
-
-#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
-
-
-/* implemented in dyld_gdb.cpp */
-void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
-void removeImageFromAllImages(const mach_header* mh);
-#if OLD_GDB_DYLD_INTERFACE
-void addImageForgdb(const mach_header* mh, uintptr_t slide, const char* physicalPath, const char* logicalPath);
-void removeImageForgdb(const struct mach_header* mh);
-#endif
-
-// magic so CrashReporter logs message
-extern "C" {
- char error_string[1024];
-}
-
-
-//
-// The file contains the core of dyld used to get a process to main().
-// The API's that dyld supports are implemented in dyldAPIs.cpp.
-//
-//
-//
-//
-//
-
-
-namespace dyld {
-
-
-//
-// state of all environment variables dyld uses
-//
-struct EnvironmentVariables {
- const char* const * DYLD_FRAMEWORK_PATH;
- const char* const * DYLD_FALLBACK_FRAMEWORK_PATH;
- const char* const * DYLD_LIBRARY_PATH;
- const char* const * DYLD_FALLBACK_LIBRARY_PATH;
- const char* const * DYLD_ROOT_PATH;
- const char* const * DYLD_INSERT_LIBRARIES;
- const char* const * LD_LIBRARY_PATH; // for unix conformance
- bool DYLD_PRINT_LIBRARIES;
- bool DYLD_PRINT_LIBRARIES_POST_LAUNCH;
- bool DYLD_BIND_AT_LAUNCH;
- bool DYLD_PRINT_STATISTICS;
- bool DYLD_PRINT_OPTS;
- bool DYLD_PRINT_ENV;
- // DYLD_IMAGE_SUFFIX ==> gLinkContext.imageSuffix
- // DYLD_PRINT_OPTS ==> gLinkContext.verboseOpts
- // DYLD_PRINT_ENV ==> gLinkContext.verboseEnv
- // DYLD_FORCE_FLAT_NAMESPACE ==> gLinkContext.bindFlat
- // DYLD_PRINT_INITIALIZERS ==> gLinkContext.verboseInit
- // DYLD_PRINT_SEGMENTS ==> gLinkContext.verboseMapping
- // DYLD_PRINT_BINDINGS ==> gLinkContext.verboseBind
- // DYLD_PRINT_REBASINGS ==> gLinkContext.verboseRebase
- // DYLD_PRINT_APIS ==> gLogAPIs
- // DYLD_IGNORE_PREBINDING ==> gLinkContext.prebindUsage
- // DYLD_PREBIND_DEBUG ==> gLinkContext.verbosePrebinding
- // DYLD_NEW_LOCAL_SHARED_REGIONS ==> gLinkContext.sharedRegionMode
- // DYLD_SHARED_REGION ==> gLinkContext.sharedRegionMode
- // DYLD_SLIDE_AND_PACK_DYLIBS ==> gLinkContext.slideAndPackDylibs
- // DYLD_PRINT_WARNINGS ==> gLinkContext.verboseWarnings
-};
-
-// all global state
-static const char* sExecPath = NULL;
-static const struct mach_header* sMainExecutableMachHeader = NULL;
-static cpu_type_t sHostCPU;
-static cpu_subtype_t sHostCPUsubtype;
-static ImageLoader* sMainExecutable = NULL;
-static bool sAllImagesMightContainUnlinkedImages; // necessary until will support dylib unloading
-static std::vector<ImageLoader*> sAllImages;
-static std::vector<ImageLoader*> sImageRoots;
-static std::vector<ImageLoader*> sImageFilesNeedingTermination;
-static std::vector<ImageLoader*> sImagesToNotifyAboutOtherImages;
-static std::vector<ImageCallback> sAddImageCallbacks;
-static std::vector<ImageCallback> sRemoveImageCallbacks;
-static ImageLoader* sLastImageByAddressCache;
-static EnvironmentVariables sEnv;
-static const char* sFrameworkFallbackPaths[] = { "$HOME/Library/Frameworks", "/Library/Frameworks", "/Network/Library/Frameworks", "/System/Library/Frameworks", NULL };
-static const char* sLibraryFallbackPaths[] = { "$HOME/lib", "/usr/local/lib", "/usr/lib", NULL };
-static BundleNotificationCallBack sBundleNotifier = NULL;
-static BundleLocatorCallBack sBundleLocation = NULL;
-static UndefinedHandler sUndefinedHandler = NULL;
-ImageLoader::LinkContext gLinkContext;
-bool gLogAPIs = false;
-const struct ThreadingHelpers* gThreadHelpers = NULL;
-
-
-
-// utility class to assure files are closed when an exception is thrown
-class FileOpener {
-public:
- FileOpener(const char* path);
- ~FileOpener();
- int getFileDescriptor() { return fd; }
-private:
- int fd;
-};
-
-FileOpener::FileOpener(const char* path)
-{
- fd = open(path, O_RDONLY, 0);
-}
-
-FileOpener::~FileOpener()
-{
- close(fd);
-}
-
-
-
-// Objective-C installs an addImage hook to dyld to get notified about new images
-// The callback needs to be run after the image is rebased and bound, but before its initializers are called
-static uint32_t imageNotification(ImageLoader* image, uint32_t startIndex)
-{
- // tell all register add image handlers about this
- const uint32_t callbackCount = sAddImageCallbacks.size();
- for (uint32_t i=startIndex; i < callbackCount; ++i) {
- ImageCallback cb = sAddImageCallbacks[i];
- //fprintf(stderr, "dyld: calling add-image-callback[%d]=%p for %s\n", i, cb, image->getPath());
- (cb)(image->machHeader(), image->getSlide());
- }
- return callbackCount;
-}
-
-
-
-// notify gdb et al about these new images
-static void notifyAdding(std::vector<ImageLoader*>& images)
-{
- // build array
- unsigned int len = images.size();
- if ( len != 0 ) {
- dyld_image_info infos[len];
- for (unsigned int i=0; i < len; ++i) {
- dyld_image_info* p = &infos[i];
- ImageLoader* image = images[i];
- p->imageLoadAddress = image->machHeader();
- p->imageFilePath = image->getPath();
- p->imageFileModDate = image->lastModified();
- //fprintf(stderr, "notifying objc about %s\n", image->getPath());
- }
-
- // tell gdb
- addImagesToAllImages(len, infos);
-
- // tell all interested images (after gdb, so you can debug anything the notification does)
- for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
- (*it)->doNotification(dyld_image_adding, len, infos);
- }
- }
-}
-
-
-
-// In order for register_func_for_add_image() callbacks to to be called bottom up,
-// we need to maintain a list of root images. The main executable is usally the
-// first root. Any images dynamically added are also roots (unless already loaded).
-// If DYLD_INSERT_LIBRARIES is used, those libraries are first.
-static void addRootImage(ImageLoader* image)
-{
- //fprintf(stderr, "addRootImage(%p, %s)\n", image, image->getPath());
- // add to list of roots
- sImageRoots.push_back(image);
-}
-
-// Objective-C will contain a __DATA/__image_notify section which contains pointers to a function to call
-// whenever any new image is loaded.
-static void addImageNeedingNotification(ImageLoader* image)
-{
- sImagesToNotifyAboutOtherImages.push_back(image);
-}
-
-static void addImage(ImageLoader* image)
-{
- // add to master list
- sAllImages.push_back(image);
-
- if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
- uint64_t offset = image->getOffsetInFatFile();
- if ( offset == 0 )
- fprintf(stderr, "dyld: loaded: %s\n", image->getPath());
- else
- fprintf(stderr, "dyld: loaded: %s, cpu-sub-type: %d\n", image->getPath(), image->machHeader()->cpusubtype);
- }
-
-#if OLD_GDB_DYLD_INTERFACE
- // let gdb find out about this
- addImageForgdb(image->machHeader(), image->getSlide(), image->getPath(), image->getLogicalPath());
-#endif
-}
-
-void removeImage(ImageLoader* image)
-{
- // if in termination list, pull it out and run terminator
- for (std::vector<ImageLoader*>::iterator it=sImageFilesNeedingTermination.begin(); it != sImageFilesNeedingTermination.end(); it++) {
- if ( *it == image ) {
- sImageFilesNeedingTermination.erase(it);
- image->doTermination(gLinkContext);
- break;
- }
- }
-
- // tell all register add image handlers about this
- // do this before removing image from internal data structures so that the callback can querey dyld about the image
- for (std::vector<ImageCallback>::iterator it=sRemoveImageCallbacks.begin(); it != sRemoveImageCallbacks.end(); it++) {
- (*it)(image->machHeader(), image->getSlide());
- }
-
- // tell all interested images
- for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
- dyld_image_info info;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getPath();
- info.imageFileModDate = image->lastModified();
- (*it)->doNotification(dyld_image_removing, 1, &info);
- }
-
- // remove from master list
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( *it == image ) {
- sAllImages.erase(it);
- break;
- }
- }
-
- // flush find-by-address cache
- if ( sLastImageByAddressCache == image )
- sLastImageByAddressCache = NULL;
-
- // if in announcement list, pull it out
- for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
- if ( *it == image ) {
- sImagesToNotifyAboutOtherImages.erase(it);
- break;
- }
- }
-
- // if in root list, pull it out
- for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
- if ( *it == image ) {
- sImageRoots.erase(it);
- break;
- }
- }
-
- // tell gdb, new way
- removeImageFromAllImages(image->machHeader());
-
-#if OLD_GDB_DYLD_INTERFACE
- // tell gdb, old way
- removeImageForgdb(image->machHeader());
- gdb_dyld_state_changed();
-#endif
-}
-
-
-static void terminationRecorder(ImageLoader* image)
-{
- sImageFilesNeedingTermination.push_back(image);
-}
-
-const char* getExecutablePath()
-{
- return sExecPath;
-}
-
-
-void initializeMainExecutable()
-{
- const int rootCount = sImageRoots.size();
- for(int i=0; i < rootCount; ++i) {
- ImageLoader* image = sImageRoots[i];
- //fprintf(stderr, "initializeMainExecutable: image = %p\n", image);
- image->runInitializers(gLinkContext);
- }
-/*
- // this does not work???
- for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
- ImageLoader* image = *it;
- fprintf(stderr, "initializeMainExecutable: image = %p\n", image);
- // don't know why vector sometimes starts with NULL element???
- if ( image != NULL )
- image->runInitializers(gLinkContext);
- }
-*/
- if ( sEnv.DYLD_PRINT_STATISTICS )
- ImageLoaderMachO::printStatistics(sAllImages.size());
-}
-
-bool mainExecutablePrebound()
-{
- return sMainExecutable->usablePrebinding(gLinkContext);
-}
-
-ImageLoader* mainExecutable()
-{
- return sMainExecutable;
-}
-
-
-void runTerminators()
-{
- const unsigned int imageCount = sImageFilesNeedingTermination.size();
- for(unsigned int i=imageCount; i > 0; --i){
- ImageLoader* image = sImageFilesNeedingTermination[i-1];
- image->doTermination(gLinkContext);
- }
- sImageFilesNeedingTermination.clear();
-}
-
-
-//
-// Turns a colon separated list of strings
-// into a NULL terminated array of string
-// pointers.
-//
-static const char** parseColonList(const char* list)
-{
- if ( list[0] == '\0' )
- return NULL;
-
- int colonCount = 0;
- for(const char* s=list; *s != '\0'; ++s) {
- if (*s == ':')
- ++colonCount;
- }
-
- int index = 0;
- const char* start = list;
- char** result = new char*[colonCount+2];
- for(const char* s=list; *s != '\0'; ++s) {
- if (*s == ':') {
- int len = s-start;
- char* str = new char[len+1];
- strncpy(str, start, len);
- str[len] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- }
- int len = strlen(start);
- char* str = new char[len+1];
- strcpy(str, start);
- result[index++] = str;
- result[index] = NULL;
-
- return (const char**)result;
-}
-
-static void paths_expand_roots(const char **paths, const char *key, const char *val)
-{
-// assert(val != NULL);
-// assert(paths != NULL);
- if(NULL != key) {
- size_t keyLen = strlen(key);
- for(int i=0; paths[i] != NULL; ++i) {
- if ( strncmp(paths[i], key, keyLen) == 0 ) {
- char* newPath = new char[strlen(val) + (strlen(paths[i]) - keyLen) + 1];
- strcpy(newPath, val);
- strcat(newPath, &paths[i][keyLen]);
- paths[i] = newPath;
- }
- }
- }
- return;
-}
-
-static void removePathWithPrefix(const char* paths[], const char* prefix)
-{
- size_t prefixLen = strlen(prefix);
- for(int s=0,d=0; (paths[d] != NULL) && (paths[s] != NULL); ++s, ++d) {
- if ( strncmp(paths[s], prefix, prefixLen) == 0 )
- ++s;
- paths[d] = paths[s];
- }
-}
-
-#if 0
-static void paths_dump(const char **paths)
-{
-// assert(paths != NULL);
- const char **strs = paths;
- while(*strs != NULL)
- {
- fprintf(stderr, "\"%s\"\n", *strs);
- strs++;
- }
- return;
-}
-#endif
-
-static void printOptions(const char* argv[])
-{
- uint32_t i = 0;
- while ( NULL != argv[i] ) {
- fprintf(stderr, "opt[%i] = \"%s\"\n", i, argv[i]);
- i++;
- }
-}
-
-static void printEnvironmentVariables(const char* envp[])
-{
- while ( NULL != *envp ) {
- fprintf(stderr, "%s\n", *envp);
- envp++;
- }
-}
-
-
-
-void processDyldEnvironmentVarible(const char* key, const char* value)
-{
- if ( strcmp(key, "DYLD_FRAMEWORK_PATH") == 0 ) {
- sEnv.DYLD_FRAMEWORK_PATH = parseColonList(value);
- }
- else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = parseColonList(value);
- }
- else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
- sEnv.DYLD_LIBRARY_PATH = parseColonList(value);
- }
- else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = parseColonList(value);
- }
- else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
- if ( strcmp(value, "/") != 0 ) {
- sEnv.DYLD_ROOT_PATH = parseColonList(value);
- for (int i=0; sEnv.DYLD_ROOT_PATH[i] != NULL; ++i) {
- if ( sEnv.DYLD_ROOT_PATH[i][0] != '/' ) {
- fprintf(stderr, "dyld: warning DYLD_ROOT_PATH not used because it contains a non-absolute path\n");
- sEnv.DYLD_ROOT_PATH = NULL;
- break;
- }
- }
- }
- }
- else if ( strcmp(key, "DYLD_IMAGE_SUFFIX") == 0 ) {
- gLinkContext.imageSuffix = value;
- }
- else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
- sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value);
- }
- else if ( strcmp(key, "DYLD_DEBUG_TRACE") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_DEBUG_TRACE not supported\n");
- }
- else if ( strcmp(key, "DYLD_ERROR_PRINT") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_ERROR_PRINT not supported\n");
- }
- else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
- sEnv.DYLD_PRINT_OPTS = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_ENV") == 0 ) {
- sEnv.DYLD_PRINT_ENV = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_LIBRARIES") == 0 ) {
- sEnv.DYLD_PRINT_LIBRARIES = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_LIBRARIES_POST_LAUNCH") == 0 ) {
- sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH = true;
- }
- else if ( strcmp(key, "DYLD_TRACE") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_TRACE not supported\n");
- }
- else if ( strcmp(key, "DYLD_EBADEXEC_ONLY") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_EBADEXEC_ONLY not supported\n");
- }
- else if ( strcmp(key, "DYLD_BIND_AT_LAUNCH") == 0 ) {
- sEnv.DYLD_BIND_AT_LAUNCH = true;
- }
- else if ( strcmp(key, "DYLD_FORCE_FLAT_NAMESPACE") == 0 ) {
- gLinkContext.bindFlat = true;
- }
- else if ( strcmp(key, "DYLD_DEAD_LOCK_HANG") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_DEAD_LOCK_HANG not supported\n");
- }
- else if ( strcmp(key, "DYLD_ABORT_MULTIPLE_INITS") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_ABORT_MULTIPLE_INITS not supported\n");
- }
- else if ( strcmp(key, "DYLD_NEW_LOCAL_SHARED_REGIONS") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
- else if ( strcmp(key, "DYLD_SLIDE_AND_PACK_DYLIBS") == 0 ) {
- gLinkContext.slideAndPackDylibs = true;
- }
- else if ( strcmp(key, "DYLD_NO_FIX_PREBINDING") == 0 ) {
- // since the new dyld never runs fix_prebinding, no need to warn if someone does not want it run
- //fprintf(stderr, "dyld: warning DYLD_NO_FIX_PREBINDING not supported\n");
- }
- else if ( strcmp(key, "DYLD_PREBIND_DEBUG") == 0 ) {
- gLinkContext.verbosePrebinding = true;
- }
- else if ( strcmp(key, "DYLD_HINTS_DEBUG") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_HINTS_DEBUG not supported\n");
- }
- else if ( strcmp(key, "DYLD_SAMPLE_DEBUG") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_SAMPLE_DEBUG not supported\n");
- }
- else if ( strcmp(key, "DYLD_EXECUTABLE_PATH_DEBUG") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_EXECUTABLE_PATH_DEBUG not supported\n");
- }
- else if ( strcmp(key, "DYLD_TWO_LEVEL_DEBUG") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_TWO_LEVEL_DEBUG not supported\n");
- }
- else if ( strcmp(key, "DYLD_LAZY_INITIALIZERS") == 0 ) {
- fprintf(stderr, "dyld: warning DYLD_LAZY_INITIALIZERS not supported\n");
- }
- else if ( strcmp(key, "DYLD_PRINT_INITIALIZERS") == 0 ) {
- gLinkContext.verboseInit = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_STATISTICS") == 0 ) {
- sEnv.DYLD_PRINT_STATISTICS = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_SEGMENTS") == 0 ) {
- gLinkContext.verboseMapping = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_BINDINGS") == 0 ) {
- gLinkContext.verboseBind = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_REBASINGS") == 0 ) {
- gLinkContext.verboseRebase = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_APIS") == 0 ) {
- gLogAPIs = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_WARNINGS") == 0 ) {
- gLinkContext.verboseWarnings = true;
- }
- else if ( strcmp(key, "DYLD_SHARED_REGION") == 0 ) {
- if ( strcmp(value, "private") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
- else if ( strcmp(value, "avoid") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- }
- else if ( strcmp(value, "use") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
- }
- else if ( value[0] == '\0' ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
- }
- else {
- fprintf(stderr, "dyld: warning unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
- }
- }
- else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
- if ( strcmp(value, "all") == 0 ) {
- gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
- }
- else if ( strcmp(value, "app") == 0 ) {
- gLinkContext.prebindUsage = ImageLoader::kUseAllButAppPredbinding;
- }
- else if ( strcmp(value, "nonsplit") == 0 ) {
- gLinkContext.prebindUsage = ImageLoader::kUseSplitSegPrebinding;
- }
- else if ( value[0] == '\0' ) {
- gLinkContext.prebindUsage = ImageLoader::kUseSplitSegPrebinding;
- }
- else {
- fprintf(stderr, "dyld: warning unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
- }
- }
- else {
- fprintf(stderr, "dyld: warning, unknown environment variable: %s\n", key);
- }
-}
-
-//
-// For security, setuid programs ignore DYLD_* environment variables.
-// Additionally, the DYLD_* enviroment variables are removed
-// from the environment, so that any child processes don't see them.
-//
-static void pruneEnvironmentVariables(const char* envp[], const char*** applep)
-{
- // delete all DYLD_* and LD_LIBRARY_PATH environment variables
- int removedCount = 0;
- const char** d = envp;
- for(const char** s = envp; *s != NULL; s++) {
- if ( (strncmp(*s, "DYLD_", 5) != 0) && (strncmp(*s, "LD_LIBRARY_PATH=", 16) != 0) ) {
- *d++ = *s;
- }
- else {
- ++removedCount;
- }
- }
- *d++ = NULL;
-
- // slide apple parameters
- if ( removedCount > 0 ) {
- *applep = d;
- do {
- *d = d[removedCount];
- } while ( *d++ != NULL );
- }
-
- // setup DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
- const char** paths = sFrameworkFallbackPaths;
- removePathWithPrefix(paths, "$HOME");
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = paths;
- }
-
- // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
- const char** paths = sLibraryFallbackPaths;
- removePathWithPrefix(paths, "$HOME");
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
- }
-}
-
-static void checkEnvironmentVariables(const char* envp[], bool ignoreEnviron)
-{
- const char* home = NULL;
- const char** p;
- for(p = envp; *p != NULL; p++) {
- const char* keyEqualsValue = *p;
- if ( strncmp(keyEqualsValue, "DYLD_", 5) == 0 ) {
- const char* equals = strchr(keyEqualsValue, '=');
- if ( (equals != NULL) && !ignoreEnviron ) {
- const char* value = &equals[1];
- const int keyLen = equals-keyEqualsValue;
- char key[keyLen+1];
- strncpy(key, keyEqualsValue, keyLen);
- key[keyLen] = '\0';
- processDyldEnvironmentVarible(key, value);
- }
- }
- else if ( strncmp(keyEqualsValue, "HOME=", 5) == 0 ) {
- home = &keyEqualsValue[5];
- }
- else if ( strncmp(keyEqualsValue, "LD_LIBRARY_PATH=", 16) == 0 ) {
- const char* path = &keyEqualsValue[16];
- sEnv.LD_LIBRARY_PATH = parseColonList(path);
- }
- }
-
- // default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
- const char** paths = sFrameworkFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(paths, "$HOME");
- else
- paths_expand_roots(paths, "$HOME", home);
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = paths;
- }
-
- // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
- const char** paths = sLibraryFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(paths, "$HOME");
- else
- paths_expand_roots(paths, "$HOME", home);
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
- }
-}
-
-
-static void getHostInfo()
-{
-#if 0
- 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 )
- throw "host_info() failed";
-
- sHostCPU = info.cpu_type;
- sHostCPUsubtype = info.cpu_subtype;
-#endif
-
- size_t valSize = sizeof(sHostCPU);
- if (sysctlbyname ("hw.cputype", &sHostCPU, &valSize, NULL, 0) != 0)
- throw "sysctlbyname(hw.cputype) failed";
- valSize = sizeof(sHostCPUsubtype);
- if (sysctlbyname ("hw.cpusubtype", &sHostCPUsubtype, &valSize, NULL, 0) != 0)
- throw "sysctlbyname(hw.cpusubtype) failed";
-}
-
-bool validImage(ImageLoader* possibleImage)
-{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- if ( possibleImage == sAllImages[i] ) {
- return true;
- }
- }
- return false;
-}
-
-uint32_t getImageCount()
-{
- if ( sAllImagesMightContainUnlinkedImages ) {
- uint32_t count = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( (*it)->isLinked() )
- ++count;
- }
- return count;
- }
- else {
- return sAllImages.size();
- }
-}
-
-ImageLoader* getIndexedImage(unsigned int index)
-{
- if ( sAllImagesMightContainUnlinkedImages ) {
- uint32_t count = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( (*it)->isLinked() ) {
- if ( index == count )
- return *it;
- ++count;
- }
- }
- }
- else {
- if ( index < sAllImages.size() )
- return sAllImages[index];
- }
- return NULL;
-}
-
-ImageLoader* findImageByMachHeader(const struct mach_header* target)
-{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->machHeader() == target )
- return anImage;
- }
- return NULL;
-}
-
-
-ImageLoader* findImageContainingAddress(const void* addr)
-{
-#if FIND_STATS
- static int cacheHit = 0;
- static int cacheMiss = 0;
- static int cacheNotMacho = 0;
- if ( ((cacheHit+cacheMiss+cacheNotMacho) % 100) == 0 )
- fprintf(stderr, "findImageContainingAddress(): cache hit = %d, miss = %d, unknown = %d\n", cacheHit, cacheMiss, cacheNotMacho);
-#endif
- // first look in image where last address was found rdar://problem/3685517
- if ( (sLastImageByAddressCache != NULL) && sLastImageByAddressCache->containsAddress(addr) ) {
-#if FIND_STATS
- ++cacheHit;
-#endif
- return sLastImageByAddressCache;
- }
- // do exhastive search
- // todo: consider maintaining a list sorted by address ranges and do a binary search on that
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->containsAddress(addr) ) {
- sLastImageByAddressCache = anImage;
-#if FIND_STATS
- ++cacheMiss;
-#endif
- return anImage;
- }
- }
-#if FIND_STATS
- ++cacheNotMacho;
-#endif
- return NULL;
-}
-
-ImageLoader* findImageContainingAddressThreadSafe(const void* addr)
-{
- // do exhastive search
- // todo: consider maintaining a list sorted by address ranges and do a binary search on that
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->containsAddress(addr) ) {
- return anImage;
- }
- }
- return NULL;
-}
-
-
-void forEachImageDo( void (*callback)(ImageLoader*, void* userData), void* userData)
-{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- (*callback)(anImage, userData);
- }
-}
-
-ImageLoader* findLoadedImage(const struct stat& stat_buf)
-{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->statMatch(stat_buf) )
- return anImage;
- }
- return NULL;
-}
-
-// based on ANSI-C strstr()
-static const char* strrstr(const char* str, const char* sub)
-{
- const int sublen = strlen(sub);
- for(const char* p = &str[strlen(str)]; p != str; --p) {
- if ( strncmp(p, sub, sublen) == 0 )
- return p;
- }
- return NULL;
-}
-
-
-//
-// Find framework path
-//
-// /path/foo.framework/foo => foo.framework/foo
-// /path/foo.framework/Versions/A/foo => foo.framework/Versions/A/foo
-// /path/foo.framework/Frameworks/bar.framework/bar => bar.framework/bar
-// /path/foo.framework/Libraries/bar.dylb => NULL
-// /path/foo.framework/bar => NULL
-//
-// Returns NULL if not a framework path
-//
-static const char* getFrameworkPartialPath(const char* path)
-{
- const char* dirDot = strrstr(path, ".framework/");
- if ( dirDot != NULL ) {
- const char* dirStart = dirDot;
- for ( ; dirStart >= path; --dirStart) {
- if ( (*dirStart == '/') || (dirStart == path) ) {
- const char* frameworkStart = &dirStart[1];
- if ( dirStart == path )
- --frameworkStart;
- int len = dirDot - frameworkStart;
- char framework[len+1];
- strncpy(framework, frameworkStart, len);
- framework[len] = '\0';
- const char* leaf = strrchr(path, '/');
- if ( leaf != NULL ) {
- if ( strcmp(framework, &leaf[1]) == 0 ) {
- return frameworkStart;
- }
- if ( gLinkContext.imageSuffix != NULL ) {
- // some debug frameworks have install names that end in _debug
- if ( strncmp(framework, &leaf[1], len) == 0 ) {
- if ( strcmp( gLinkContext.imageSuffix, &leaf[len+1]) == 0 )
- return frameworkStart;
- }
- }
- }
- }
- }
- }
- return NULL;
-}
-
-
-static const char* getLibraryLeafName(const char* path)
-{
- const char* start = strrchr(path, '/');
- if ( start != NULL )
- return &start[1];
- else
- return path;
-}
-
-
-
-const cpu_subtype_t CPU_SUBTYPE_END_OF_LIST = -1;
-
-
-//
-// A fat file may contain multiple sub-images for the same CPU type.
-// In that case, dyld picks which sub-image to use by scanning a table
-// of preferred cpu-sub-types for the running cpu.
-//
-// There is one row in the table for each cpu-sub-type on which dyld might run.
-// The first entry in a row is that cpu-sub-type. It is followed by all
-// cpu-sub-types that can run on that cpu, if preferred order. Each row ends with
-// a "SUBTYPE_ALL" (to denote that images written to run on any cpu-sub-type are usable),
-// followed by one or more CPU_SUBTYPE_END_OF_LIST to pad out this row.
-//
-
-
-//
-// 32-bit PowerPC sub-type lists
-//
-const int kPPC_RowCount = 4;
-static const cpu_subtype_t kPPC32[kPPC_RowCount][6] = {
- // G5 can run any code
- { CPU_SUBTYPE_POWERPC_970, CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // G4 can run all but G5 code
- { CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
- { CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // G3 cannot run G4 or G5 code
- { CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST }
-};
-
-
-//
-// 64-bit PowerPC sub-type lists
-//
-const int kPPC64_RowCount = 1;
-static const cpu_subtype_t kPPC64[kPPC64_RowCount][3] = {
- // G5 can run any 64-bit code
- { CPU_SUBTYPE_POWERPC_970, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST },
-};
-
-
-
-//
-// 32-bit x86 sub-type lists
-//
-// TO-DO
-
-
-
-// scan the tables above to find the cpu-sub-type-list for this machine
-static const cpu_subtype_t* findCPUSubtypeList(cpu_type_t cpu, cpu_subtype_t subtype)
-{
- switch (cpu) {
- case CPU_TYPE_POWERPC:
- for (int i=0; i < kPPC_RowCount ; ++i) {
- if ( kPPC32[i][0] == subtype )
- return kPPC32[i];
- }
- break;
- case CPU_TYPE_POWERPC64:
- for (int i=0; i < kPPC64_RowCount ; ++i) {
- if ( kPPC64[i][0] == subtype )
- return kPPC64[i];
- }
- break;
- case CPU_TYPE_I386:
- // To do
- break;
- }
- return NULL;
-}
-
-
-
-
-// scan fat table-of-contents for best most preferred subtype
-static bool fatFindBestFromOrderedList(cpu_type_t cpu, const cpu_subtype_t list[], const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- const fat_arch* const archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for (uint32_t subTypeIndex=0; list[subTypeIndex] != CPU_SUBTYPE_END_OF_LIST; ++subTypeIndex) {
- for(uint32_t fatIndex=0; fatIndex < OSSwapBigToHostInt32(fh->nfat_arch); ++fatIndex) {
- if ( ((cpu_type_t)OSSwapBigToHostInt32(archs[fatIndex].cputype) == cpu)
- && (list[subTypeIndex] == archs[fatIndex].cpusubtype) ) {
- *offset = OSSwapBigToHostInt32(archs[fatIndex].offset);
- *len = OSSwapBigToHostInt32(archs[fatIndex].size);
- return true;
- }
- }
- }
- return false;
-}
-
-// scan fat table-of-contents for exact match of cpu and cpu-sub-type
-static bool fatFindExactMatch(cpu_type_t cpu, cpu_subtype_t subtype, const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
- if ( ((cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu)
- && ((cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == subtype) ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- }
- return false;
-}
-
-// scan fat table-of-contents for image with matching cpu-type and runs-on-all-sub-types
-static bool fatFindRunsOnAllCPUs(cpu_type_t cpu, const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
- if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu) {
- switch (cpu) {
- case CPU_TYPE_POWERPC:
- case CPU_TYPE_POWERPC64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_POWERPC_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
- case CPU_TYPE_I386:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_I386_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
- case CPU_TYPE_X86_64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_X86_64_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
- }
- }
- }
- return false;
-}
-
-
-//
-// A fat file may contain multiple sub-images for the same cpu-type,
-// each optimized for a different cpu-sub-type (e.g G3 or G5).
-// This routine picks the optimal sub-image.
-//
-static bool fatFindBest(const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- // assume all dylibs loaded must have same cpu type as main executable
- const cpu_type_t cpu = sMainExecutableMachHeader->cputype;
-
- // We only know the subtype to use if the main executable cpu type matches the host
- if ( (cpu & CPU_TYPE_MASK) == sHostCPU ) {
- // get preference ordered list of subtypes
- const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(cpu, sHostCPUsubtype);
-
- // use ordered list to find best sub-image in fat file
- if ( subTypePreferenceList != NULL )
- return fatFindBestFromOrderedList(cpu, subTypePreferenceList, fh, offset, len);
-
- // if running cpu is not in list, try for an exact match
- if ( fatFindExactMatch(cpu, sHostCPUsubtype, fh, offset, len) )
- return true;
- }
-
- // running on an uknown cpu, can only load generic code
- return fatFindRunsOnAllCPUs(cpu, fh, offset, len);
-}
-
-
-
-//
-// This is used to validate if a non-fat (aka thin or raw) mach-o file can be used
-// on the current processor. It is deemed compatible if any of the following are true:
-// 1) mach_header subtype is in list of compatible subtypes for running processor
-// 2) mach_header subtype is same as running processor subtype
-// 3) mach_header subtype runs on all processor variants
-//
-//
-bool isCompatibleMachO(const uint8_t* firstPage)
-{
- const mach_header* mh = (mach_header*)firstPage;
- if ( mh->magic == sMainExecutableMachHeader->magic ) {
- if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
- if ( (mh->cputype & CPU_TYPE_MASK) == sHostCPU ) {
- // get preference ordered list of subtypes that this machine can use
- const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(mh->cputype, sHostCPUsubtype);
- if ( subTypePreferenceList != NULL ) {
- // if image's subtype is in the list, it is compatible
- for (const cpu_subtype_t* p = subTypePreferenceList; *p != CPU_SUBTYPE_END_OF_LIST; ++p) {
- if ( *p == mh->cpusubtype )
- return true;
- }
- // have list and not in list, so not compatible
- throw "incompatible cpu-subtype";
- }
- // unknown cpu sub-type, but if exact match for current subtype then ok to use
- if ( mh->cpusubtype == sHostCPUsubtype )
- return true;
- }
-
- // cpu unknown, so don't know if subtype is compatible
- // only load _ALL variant
- switch (mh->cputype) {
- case CPU_TYPE_POWERPC:
- case CPU_TYPE_POWERPC64:
- if ( mh->cpusubtype == CPU_SUBTYPE_POWERPC_ALL )
- return true;
- break;
- case CPU_TYPE_I386:
- if ( mh->cpusubtype == CPU_SUBTYPE_I386_ALL )
- return true;
- break;
- case CPU_TYPE_X86_64:
- if ( mh->cpusubtype == CPU_SUBTYPE_X86_64_ALL )
- return true;
- break;
- }
- }
- }
- return false;
-}
-
-
-// The kernel maps in main executable before dyld gets control. We need to
-// make an ImageLoader* for the already mapped in main executable.
-static ImageLoader* instantiateFromLoadedImage(const struct mach_header* mh, const char* path)
-{
- // try mach-o loader
- if ( isCompatibleMachO((const uint8_t*)mh) ) {
- ImageLoader* image = new ImageLoaderMachO(path, mh, 0, gLinkContext);
- addImage(image);
- return image;
- }
-
- throw "main executable not a known format";
-}
-
-
-
-
-// map in file and instantiate an ImageLoader
-static ImageLoader* loadPhase6(int fd, struct stat& stat_buf, const char* path, const LoadContext& context)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- uint64_t fileOffset = 0;
- uint64_t fileLength = stat_buf.st_size;
-#if __ppc64__
- if ( *((uint32_t*)((char*)(&stat_buf)+0x60)) == 0xFEFEFEFE )
- fileLength = *((uint64_t*)((char*)(&stat_buf)+0x30)); // HACK work around for kernel stat bug rdar://problem/3845883
-#endif
-
- // validate it is a file (not directory)
- if ( (stat_buf.st_mode & S_IFMT) != S_IFREG )
- throw "not a file";
-
- // min file is 4K
- if ( fileLength < 4096 ) {
- throw "file to short";
- }
-
- uint8_t firstPage[4096];
- pread(fd, firstPage, 4096,0);
-
- // if fat wrapper, find usable sub-file
- const fat_header* fileStartAsFat = (fat_header*)firstPage;
- if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
- pread(fd, firstPage, 4096, fileOffset);
- }
- else {
- throw "no matching architecture in universal wrapper";
- }
- }
-
- // try mach-o loader
- if ( isCompatibleMachO(firstPage) ) {
- char realFilePath[PATH_MAX];
- if ( gLinkContext.slideAndPackDylibs ) {
- // when prebinding, we always want to track the real path of images
- if ( realpath(path, realFilePath) != NULL )
- path = realFilePath;
- }
-
- // instantiate an image
- ImageLoader* image = new ImageLoaderMachO(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
-
- // now sanity check that this loaded image does not have the same install path as any existing image
- const char* loadedImageInstallPath = image->getInstallPath();
- if ( image->isDylib() && (loadedImageInstallPath != NULL) && (loadedImageInstallPath[0] == '/') ) {
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
- //fprintf(stderr, "duplicate(%s) => %p\n", installPath, anImage);
- delete image;
- return anImage;
- }
- }
- }
- }
-
- // some API's restrict what they can load
- if ( context.mustBeBundle && !image->isBundle() )
- throw "not a bundle";
- if ( context.mustBeDylib && !image->isDylib() )
- throw "not a dylib";
-
- // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
- if ( ! image->isBundle() )
- addImage(image);
-
- return image;
- }
-
- // try other file formats...
-
-
- // throw error about what was found
- switch (*(uint32_t*)firstPage) {
- case MH_MAGIC:
- case MH_CIGAM:
- case MH_MAGIC_64:
- case MH_CIGAM_64:
- throw "mach-o, but wrong architecture";
- default:
- throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- firstPage[0], firstPage[1], firstPage[2], firstPage[3], firstPage[4], firstPage[5], firstPage[6],firstPage[7]);
- }
-}
-
-
-// try to open file
-static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //fprintf(stdout, "%s(%s)\n", __func__, path);
- ImageLoader* image = NULL;
-
- // open file (automagically closed when this function exits)
- FileOpener file(path);
-
- //fprintf(stderr, "open(%s) => %d\n", path, file.getFileDescriptor() );
-
- if ( file.getFileDescriptor() == -1 )
- return NULL;
-
- struct stat stat_buf;
-#if __ppc64__
- memset(&stat_buf, 254, sizeof(struct stat)); // hack until rdar://problem/3845883 is fixed
-#endif
- if ( fstat(file.getFileDescriptor(), &stat_buf) == -1)
- throw "stat error";
-
- // in case image was renamed or found via symlinks, check for inode match
- image = findLoadedImage(stat_buf);
- if ( image != NULL )
- return image;
-
- // needed to implement NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
- if ( context.dontLoad )
- return NULL;
-
- try {
- return loadPhase6(file.getFileDescriptor(), stat_buf, path, context);
- }
- catch (const char* msg) {
- char* newMsg = new char[strlen(msg) + strlen(path) + 8];
- sprintf(newMsg, "%s: %s", path, msg);
- exceptions->push_back(newMsg);
- return NULL;
- }
-}
-
-// look for path match with existing loaded images
-static ImageLoader* loadPhase5check(const char* path, const LoadContext& context)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- // search path against load-path and install-path of all already loaded images
- uint32_t hash = ImageLoader::hash(path);
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- // check has first to cut down on strcmp calls
- if ( anImage->getPathHash() == hash )
- if ( strcmp(path, anImage->getPath()) == 0 ) {
- // if we are looking for a dylib don't return something else
- if ( !context.mustBeDylib || anImage->isDylib() )
- return anImage;
- }
- if ( context.matchByInstallName || anImage->matchInstallPath() ) {
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( strcmp(path, installPath) == 0 ) {
- // if we are looking for a dylib don't return something else
- if ( !context.mustBeDylib || anImage->isDylib() )
- return anImage;
- }
- }
- }
- }
-
- //fprintf(stderr, "check(%s) => NULL\n", path);
- return NULL;
-}
-
-
-// open or check existing
-static ImageLoader* loadPhase5(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- if ( exceptions != NULL )
- return loadPhase5open(path, context, exceptions);
- else
- return loadPhase5check(path, context);
-}
-
-// try with and without image suffix
-static ImageLoader* loadPhase4(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- ImageLoader* image = NULL;
- if ( gLinkContext.imageSuffix != NULL ) {
- char pathWithSuffix[strlen(path)+strlen( gLinkContext.imageSuffix)+2];
- ImageLoader::addSuffix(path, gLinkContext.imageSuffix, pathWithSuffix);
- image = loadPhase5(pathWithSuffix, context, exceptions);
- }
- if ( image == NULL )
- image = loadPhase5(path, context, exceptions);
- return image;
-}
-
-
-// expand @ variables
-static ImageLoader* loadPhase3(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- ImageLoader* image = NULL;
- if ( strncmp(path, "@executable_path/", 17) == 0 ) {
- // handle @executable_path path prefix
- const char* executablePath = sExecPath;
- char newPath[strlen(executablePath) + strlen(path)];
- strcpy(newPath, executablePath);
- char* addPoint = strrchr(newPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[17]);
- else
- strcpy(newPath, &path[17]);
- image = loadPhase4(newPath, context, exceptions);
- if ( image != NULL )
- return image;
-
- // perhaps main executable path is a sym link, find realpath and retry
- char resolvedPath[PATH_MAX];
- if ( realpath(sExecPath, resolvedPath) != NULL ) {
- char newRealPath[strlen(resolvedPath) + strlen(path)];
- strcpy(newRealPath, resolvedPath);
- char* addPoint = strrchr(newRealPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[17]);
- else
- strcpy(newRealPath, &path[17]);
- image = loadPhase4(newRealPath, context, exceptions);
- if ( image != NULL )
- return image;
- }
- }
- else if ( (strncmp(path, "@loader_path/", 13) == 0) && (context.origin != NULL) ) {
- // handle @loader_path path prefix
- char newPath[strlen(context.origin) + strlen(path)];
- strcpy(newPath, context.origin);
- char* addPoint = strrchr(newPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[13]);
- else
- strcpy(newPath, &path[13]);
- image = loadPhase4(newPath, context, exceptions);
- if ( image != NULL )
- return image;
-
- // perhaps loader path is a sym link, find realpath and retry
- char resolvedPath[PATH_MAX];
- if ( realpath(context.origin, resolvedPath) != NULL ) {
- char newRealPath[strlen(resolvedPath) + strlen(path)];
- strcpy(newRealPath, resolvedPath);
- char* addPoint = strrchr(newRealPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[13]);
- else
- strcpy(newRealPath, &path[13]);
- image = loadPhase4(newRealPath, context, exceptions);
- if ( image != NULL )
- return image;
- }
- }
-
- return loadPhase4(path, context, exceptions);
-}
-
-
-// try search paths
-static ImageLoader* loadPhase2(const char* path, const LoadContext& context,
- const char* const frameworkPaths[], const char* const libraryPaths[],
- std::vector<const char*>* exceptions)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- ImageLoader* image = NULL;
- const char* frameworkPartialPath = getFrameworkPartialPath(path);
- if ( frameworkPaths != NULL ) {
- if ( frameworkPartialPath != NULL ) {
- const int frameworkPartialPathLen = strlen(frameworkPartialPath);
- for(const char* const* fp = frameworkPaths; *fp != NULL; ++fp) {
- char npath[strlen(*fp)+frameworkPartialPathLen+8];
- strcpy(npath, *fp);
- strcat(npath, "/");
- strcat(npath, frameworkPartialPath);
- //fprintf(stderr, "dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
- image = loadPhase4(npath, context, exceptions);
- if ( image != NULL )
- return image;
- }
- }
- }
- if ( libraryPaths != NULL ) {
- const char* libraryLeafName = getLibraryLeafName(path);
- const int libraryLeafNameLen = strlen(libraryLeafName);
- for(const char* const* lp = libraryPaths; *lp != NULL; ++lp) {
- char libpath[strlen(*lp)+libraryLeafNameLen+8];
- strcpy(libpath, *lp);
- strcat(libpath, "/");
- strcat(libpath, libraryLeafName);
- //fprintf(stderr, "dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
- image = loadPhase4(libpath, context, exceptions);
- if ( image != NULL )
- return image;
- }
- }
- return NULL;
-}
-
-// try search overrides and fallbacks
-static ImageLoader* loadPhase1(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- ImageLoader* image = NULL;
-
- // handle LD_LIBRARY_PATH environment variables that force searching
- if ( context.useLdLibraryPath && (sEnv.LD_LIBRARY_PATH != NULL) ) {
- image = loadPhase2(path, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
- if ( image != NULL )
- return image;
- }
-
- // handle DYLD_ environment variables that force searching
- if ( context.useSearchPaths && ((sEnv.DYLD_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_LIBRARY_PATH != NULL)) ) {
- image = loadPhase2(path, context, sEnv.DYLD_FRAMEWORK_PATH, sEnv.DYLD_LIBRARY_PATH, exceptions);
- if ( image != NULL )
- return image;
- }
-
- // try raw path
- image = loadPhase3(path, context, exceptions);
- if ( image != NULL )
- return image;
-
- // try fallback paths during second time (will open file)
- if ( (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_FALLBACK_LIBRARY_PATH != NULL)) ) {
- image = loadPhase2(path, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, sEnv.DYLD_FALLBACK_LIBRARY_PATH, exceptions);
- if ( image != NULL )
- return image;
- }
-
- return NULL;
-}
-
-// try root substitutions
-static ImageLoader* loadPhase0(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
-
- // handle DYLD_ROOT_PATH which forces absolute paths to use a new root
- if ( (sEnv.DYLD_ROOT_PATH != NULL) && (path[0] == '/') ) {
- for(const char* const* rootPath = sEnv.DYLD_ROOT_PATH ; *rootPath != NULL; ++rootPath) {
- char newPath[strlen(*rootPath) + strlen(path)+2];
- strcpy(newPath, *rootPath);
- strcat(newPath, path);
- ImageLoader* image = loadPhase1(newPath, context, exceptions);
- if ( image != NULL )
- return image;
- }
- }
-
- // try raw path
- return loadPhase1(path, context, exceptions);
-}
-
-//
-// Given all the DYLD_ environment variables, the general case for loading libraries
-// is that any given path expands into a list of possible locations to load. We
-// also must take care to ensure two copies of the "same" library are never loaded.
-//
-// The algorithm used here is that there is a separate function for each "phase" of the
-// path expansion. Each phase function calls the next phase with each possible expansion
-// of that phase. The result is the last phase is called with all possible paths.
-//
-// To catch duplicates the algorithm is run twice. The first time, the last phase checks
-// the path against all loaded images. The second time, the last phase calls open() on
-// the path. Either time, if an image is found, the phases all unwind without checking
-// for other paths.
-//
-ImageLoader* load(const char* path, const LoadContext& context)
-{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
- char realPath[PATH_MAX];
- // when DYLD_IMAGE_SUFFIX is in used, do a realpath(), otherwise a load of "Foo.framework/Foo" will not match
- if ( context.useSearchPaths && ( gLinkContext.imageSuffix != NULL) ) {
- if ( realpath(path, realPath) != NULL )
- path = realPath;
- }
-
- // try all path permutations and check against existing loaded images
- ImageLoader* image = loadPhase0(path, context, NULL);
- if ( image != NULL )
- return image;
-
- // try all path permutations and try open() until first sucesss
- std::vector<const char*> exceptions;
- image = loadPhase0(path, context, &exceptions);
- if ( image != NULL )
- return image;
- else if ( context.dontLoad )
- return NULL;
- else if ( exceptions.size() == 0 )
- throw "image not found";
- else {
- const char* msgStart = "no suitable image found. Did find:";
- const char* delim = "\n\t";
- size_t allsizes = strlen(msgStart)+8;
- for (unsigned int i=0; i < exceptions.size(); ++i)
- allsizes += (strlen(exceptions[i]) + strlen(delim));
- char* fullMsg = new char[allsizes];
- strcpy(fullMsg, msgStart);
- for (unsigned int i=0; i < exceptions.size(); ++i) {
- strcat(fullMsg, delim);
- strcat(fullMsg, exceptions[i]);
- }
- throw (const char*)fullMsg;
- }
-}
-
-
-
-
-// create when NSLinkModule is called for a second time on a bundle
-ImageLoader* cloneImage(ImageLoader* image)
-{
- const uint64_t offsetInFat = image->getOffsetInFatFile();
-
- // open file (automagically closed when this function exits)
- FileOpener file(image->getPath());
-
- struct stat stat_buf;
-#if __ppc64__
- memset(&stat_buf, 254, sizeof(struct stat)); // hack until rdar://problem/3845883 is fixed
-#endif
- if ( fstat(file.getFileDescriptor(), &stat_buf) == -1)
- throw "stat error";
-
- // read first page of file
- uint8_t firstPage[4096];
- pread(file.getFileDescriptor(), firstPage, 4096, offsetInFat);
-
- // fat length is only used for sanity checking, since this image was already loaded once, just use upper bound
- uint64_t lenInFat = stat_buf.st_size - offsetInFat;
-
- // try mach-o loader
- if ( isCompatibleMachO(firstPage) ) {
- ImageLoader* clone = new ImageLoaderMachO(image->getPath(), file.getFileDescriptor(), firstPage, offsetInFat, lenInFat, stat_buf, gLinkContext);
- // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
- if ( ! image->isBundle() )
- addImage(clone);
- return clone;
- }
-
- // try other file formats...
- throw "can't clone image";
-}
-
-
-ImageLoader* loadFromMemory(const uint8_t* mem, uint64_t len, const char* moduleName)
-{
- // if fat wrapper, find usable sub-file
- const fat_header* memStartAsFat = (fat_header*)mem;
- uint64_t fileOffset = 0;
- uint64_t fileLength = len;
- if ( memStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( fatFindBest(memStartAsFat, &fileOffset, &fileLength) ) {
- mem = &mem[fileOffset];
- len = fileLength;
- }
- else {
- throw "no matching architecture in universal wrapper";
- }
- }
-
- // try mach-o each loader
- if ( isCompatibleMachO(mem) ) {
- ImageLoader* image = new ImageLoaderMachO(moduleName, (mach_header*)mem, len, gLinkContext);
- // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
- if ( ! image->isBundle() )
- addImage(image);
- return image;
- }
-
- // try other file formats...
-
- // throw error about what was found
- switch (*(uint32_t*)mem) {
- case MH_MAGIC:
- case MH_CIGAM:
- case MH_MAGIC_64:
- case MH_CIGAM_64:
- throw "mach-o, but wrong architecture";
- default:
- throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- mem[0], mem[1], mem[2], mem[3], mem[4], mem[5], mem[6],mem[7]);
- }
-}
-
-
-void registerAddCallback(ImageCallback func)
-{
- // now add to list to get notified when any more images are added
- sAddImageCallbacks.push_back(func);
-
- // call callback with all existing images, starting at roots
- const int rootCount = sImageRoots.size();
- for(int i=0; i < rootCount; ++i) {
- ImageLoader* image = sImageRoots[i];
- image->runNotification(gLinkContext, sAddImageCallbacks.size());
- }
-
-// for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
-// ImageLoader* image = *it;
-// image->runNotification(gLinkContext, sAddImageCallbacks.size());
-// }
-}
-
-void registerRemoveCallback(ImageCallback func)
-{
- sRemoveImageCallbacks.push_back(func);
-}
-
-void clearErrorMessage()
-{
- error_string[0] = '\0';
-}
-
-void setErrorMessage(const char* message)
-{
- // save off error message in global buffer for CrashReporter to find
- strncpy(error_string, message, sizeof(error_string)-1);
- error_string[sizeof(error_string)-1] = '\0';
-}
-
-const char* getErrorMessage()
-{
- return error_string;
-}
-
-void halt(const char* message)
-{
- fprintf(stderr, "dyld: %s\n", message);
- setErrorMessage(message);
- strncpy(error_string, message, sizeof(error_string)-1);
- error_string[sizeof(error_string)-1] = '\0';
-
-#if __ppc__ || __ppc64__
- __asm__ ("trap");
-#elif __i386__ || __x86_64__
- __asm__ ("int3");
-#else
- #error unknown architecture
-#endif
- abort(); // needed to suppress warning that noreturn function returns
-}
-
-
-uintptr_t bindLazySymbol(const mach_header* mh, uintptr_t* lazyPointer)
-{
- uintptr_t result = 0;
- // acquire read-lock on dyld's data structures
-#if 0 // rdar://problem/3811777 turn off locking until deadlock is resolved
- if ( gThreadHelpers != NULL )
- (*gThreadHelpers->lockForReading)();
-#endif
- // lookup and bind lazy pointer and get target address
- try {
- ImageLoader* target;
- #if __i386__
- // fast stubs pass NULL for mh and image is instead found via the location of stub (aka lazyPointer)
- if ( mh == NULL )
- target = dyld::findImageContainingAddressThreadSafe(lazyPointer);
- else
- target = dyld::findImageByMachHeader(mh);
- #else
- // note, target should always be mach-o, because only mach-o lazy handler wired up to this
- target = dyld::findImageByMachHeader(mh);
- #endif
- if ( target == NULL )
- throw "image not found for lazy pointer";
- result = target->doBindLazySymbol(lazyPointer, gLinkContext);
- }
- catch (const char* message) {
- fprintf(stderr, "dyld: lazy symbol binding failed: %s\n", message);
- halt(message);
- }
- // release read-lock on dyld's data structures
-#if 0
- if ( gThreadHelpers != NULL )
- (*gThreadHelpers->unlockForReading)();
-#endif
- // return target address to glue which jumps to it with real parameters restored
- return result;
-}
-
-
-// SPI used by ZeroLink to lazy load bundles
-void registerZeroLinkHandlers(BundleNotificationCallBack notify, BundleLocatorCallBack locate)
-{
- sBundleNotifier = notify;
- sBundleLocation = locate;
-}
-
-void registerUndefinedHandler(UndefinedHandler handler)
-{
- sUndefinedHandler = handler;
-}
-
-static void undefinedHandler(const char* symboName)
-{
- if ( sUndefinedHandler != NULL ) {
- (*sUndefinedHandler)(symboName);
- }
-}
-
-static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, ImageLoader** image)
-{
- // try ZeroLink short cut to finding bundle which exports this symbol
- if ( sBundleLocation != NULL ) {
- ImageLoader* zlImage = (*sBundleLocation)(name);
- if ( zlImage == ((ImageLoader*)(-1)) ) {
- // -1 is magic value that request symbol is in a bundle not yet linked into process
- // try calling handler to link in that symbol
- undefinedHandler(name);
- // call locator again
- zlImage = (*sBundleLocation)(name);
- }
- // if still not found, then ZeroLink has no idea where to find it
- if ( zlImage == ((ImageLoader*)(-1)) )
- return false;
- if ( zlImage != NULL ) {
- // ZeroLink cache knows where the symbol is
- *sym = zlImage->findExportedSymbol(name, NULL, false, image);
- if ( *sym != NULL ) {
- *image = zlImage;
- return true;
- }
- }
- else {
- // ZeroLink says it is in some bundle already loaded, but not linked, walk them all
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->isBundle() && !anImage->hasHiddenExports() ) {
- //fprintf(stderr, "dyld: search for %s in %s\n", name, anImage->getPath());
- *sym = anImage->findExportedSymbol(name, NULL, false, image);
- if ( *sym != NULL ) {
- return true;
- }
- }
- }
- }
- }
-
- // search all images in order
- ImageLoader* firstWeakImage = NULL;
- const ImageLoader::Symbol* firstWeakSym = NULL;
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- if ( ! anImage->hasHiddenExports() && (!onlyInCoalesced || anImage->hasCoalescedExports()) ) {
- *sym = anImage->findExportedSymbol(name, NULL, false, image);
- if ( *sym != NULL ) {
- // if weak definition found, record first one found
- if ( ((*image)->getExportedSymbolInfo(*sym) & ImageLoader::kWeakDefinition) != 0 ) {
- if ( firstWeakImage == NULL ) {
- firstWeakImage = *image;
- firstWeakSym = *sym;
- }
- }
- else {
- // found non-weak, so immediately return with it
- return true;
- }
- }
- }
- }
- if ( firstWeakSym != NULL ) {
- // found a weak definition, but no non-weak, so return first weak found
- *sym = firstWeakSym;
- *image = firstWeakImage;
- return true;
- }
-
- return false;
-}
-
-bool flatFindExportedSymbol(const char* name, const ImageLoader::Symbol** sym, ImageLoader** image)
-{
- return findExportedSymbol(name, false, sym, image);
-}
-
-bool findCoalescedExportedSymbol(const char* name, const ImageLoader::Symbol** sym, ImageLoader** image)
-{
- return findExportedSymbol(name, true, sym, image);
-}
-
-
-bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, ImageLoader** image)
-{
- // search all images in order
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- // only look at images whose paths contain the hint string (NULL hint string is wildcard)
- if ( ! anImage->isBundle() && ((librarySubstring==NULL) || (strstr(anImage->getPath(), librarySubstring) != NULL)) ) {
- *sym = anImage->findExportedSymbol(name, NULL, false, image);
- if ( *sym != NULL ) {
- return true;
- }
- }
- }
- return false;
-}
-
-static void getMappedRegions(ImageLoader::RegionsVector& regions)
-{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- anImage->addMappedRegions(regions);
- }
-}
-
-
-static ImageLoader* libraryLocator(const char* libraryName, bool search, const char* origin, const char* rpath[])
-{
- dyld::LoadContext context;
- context.useSearchPaths = search;
- context.useLdLibraryPath = false;
- context.dontLoad = false;
- context.mustBeBundle = false;
- context.mustBeDylib = true;
- context.matchByInstallName = false;
- context.origin = origin;
- context.rpath = rpath;
- return load(libraryName, context);
-}
-
-
-static void setContext(int argc, const char* argv[], const char* envp[], const char* apple[])
-{
- gLinkContext.loadLibrary = &libraryLocator;
- gLinkContext.imageNotification = &imageNotification;
- gLinkContext.terminationRecorder = &terminationRecorder;
- gLinkContext.flatExportFinder = &flatFindExportedSymbol;
- gLinkContext.coalescedExportFinder = &findCoalescedExportedSymbol;
- gLinkContext.undefinedHandler = &undefinedHandler;
- gLinkContext.addImageNeedingNotification = &addImageNeedingNotification;
- gLinkContext.notifyAdding = ¬ifyAdding;
- gLinkContext.getAllMappedRegions = &getMappedRegions;
- gLinkContext.bindingHandler = NULL;
- gLinkContext.bindingOptions = ImageLoader::kBindingNone;
- gLinkContext.mainExecutable = sMainExecutable;
- gLinkContext.argc = argc;
- gLinkContext.argv = argv;
- gLinkContext.envp = envp;
- gLinkContext.apple = apple;
-}
-
-static bool isRosetta()
-{
- int mib[] = { CTL_KERN, KERN_CLASSIC, getpid() };
- int is_classic = 0;
- size_t len = sizeof(int);
- int ret = sysctl(mib, 3, &is_classic, &len, NULL, 0);
- if ((ret != -1) && is_classic) {
- // we're running under Rosetta
- return true;
- }
- return false;
-}
-
-void link(ImageLoader* image, ImageLoader::BindingLaziness bindness, ImageLoader::InitializerRunning runInitializers)
-{
- // add to list of known images. This did not happen at creation time for bundles
- if ( image->isBundle() )
- addImage(image);
-
- // we detect root images as those not linked in yet
- if ( !image->isLinked() )
- addRootImage(image);
-
- // notify ZeroLink of new image with concat of logical and physical name
- if ( sBundleNotifier != NULL && image->isBundle() ) {
- const int logicalLen = strlen(image->getLogicalPath());
- char logAndPhys[strlen(image->getPath())+logicalLen+2];
- strcpy(logAndPhys, image->getLogicalPath());
- strcpy(&logAndPhys[logicalLen+1], image->getPath());
- (*sBundleNotifier)(logAndPhys, image);
- }
-
- // process images
- try {
- image->link(gLinkContext, bindness, runInitializers, sAddImageCallbacks.size());
- }
- catch (const char* msg) {
- sAllImagesMightContainUnlinkedImages = true;
- throw msg;
- }
-
-#if OLD_GDB_DYLD_INTERFACE
- // notify gdb that loaded libraries have changed
- gdb_dyld_state_changed();
-#endif
-}
-
-
-//
-// _pthread_keys is partitioned in a lower part that dyld will use; libSystem
-// will use the upper part. We set __pthread_tsd_first to 1 as the start of
-// the lower part. Libc will take #1 and c++ exceptions will take #2. There
-// is one free key=3 left.
-//
-extern "C" {
- extern int __pthread_tsd_first;
-}
-
-
-//
-// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
-// sets up some registers and call this function.
-//
-// Returns address of main() in target program which __dyld_start jumps to
-//
-uintptr_t
-_main(const struct mach_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
-{
- // set pthread keys to dyld range
- __pthread_tsd_first = 1;
-
- // Pickup the pointer to the exec path.
- sExecPath = apple[0];
- bool ignoreEnvironmentVariables = false;
-#if __i386__
- if ( isRosetta() ) {
- // under Rosetta (x86 side)
- // When a 32-bit ppc program is run under emulation on an Intel processor,
- // we want any i386 dylibs (e.g. any used by Rosetta) to not load in the shared region
- // because the shared region is being used by ppc dylibs
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- sExecPath = strdup(apple[0] + strlen(apple[0]) + 1);
- ignoreEnvironmentVariables = true;
- }
-#endif
- if ( sExecPath[0] != '/' ) {
- // have relative path, use cwd to make absolute
- char cwdbuff[MAXPATHLEN];
- if ( getcwd(cwdbuff, MAXPATHLEN) != NULL ) {
- // maybe use static buffer to avoid calling malloc so early...
- char* s = new char[strlen(cwdbuff) + strlen(sExecPath) + 2];
- strcpy(s, cwdbuff);
- strcat(s, "/");
- strcat(s, sExecPath);
- sExecPath = s;
- }
- }
- uintptr_t result = 0;
- sMainExecutableMachHeader = mainExecutableMH;
- if ( issetugid() )
- pruneEnvironmentVariables(envp, &apple);
- else
- checkEnvironmentVariables(envp, ignoreEnvironmentVariables);
- if ( sEnv.DYLD_PRINT_OPTS )
- printOptions(argv);
- if ( sEnv.DYLD_PRINT_ENV )
- printEnvironmentVariables(envp);
- getHostInfo();
- setContext(argc, argv, envp, apple);
- ImageLoader::BindingLaziness bindness = sEnv.DYLD_BIND_AT_LAUNCH ? ImageLoader::kLazyAndNonLazy : ImageLoader::kNonLazyOnly;
-
- // load any inserted libraries before loading the main executable so that they are first in flat namespace
- int insertLibrariesCount = 0;
- if ( sEnv.DYLD_INSERT_LIBRARIES != NULL ) {
- for (const char* const* lib = sEnv.DYLD_INSERT_LIBRARIES; *lib != NULL; ++lib) {
- insertLibrariesCount++;
- }
- }
- ImageLoader* insertedImages[insertLibrariesCount];
- if ( insertLibrariesCount > 0 ) {
- for (int i=0; i < insertLibrariesCount; ++i) {
- try {
- LoadContext context;
- context.useSearchPaths = false;
- context.useLdLibraryPath = false;
- context.dontLoad = false;
- context.mustBeBundle = false;
- context.mustBeDylib = true;
- context.matchByInstallName = false;
- context.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
- context.rpath = NULL;
- insertedImages[i] = load(sEnv.DYLD_INSERT_LIBRARIES[i], context);
- }
- catch (...) {
- char buf[strlen(sEnv.DYLD_INSERT_LIBRARIES[i])+50];
- sprintf(buf, "could not load inserted library: %s\n", sEnv.DYLD_INSERT_LIBRARIES[i]);
- insertedImages[i] = NULL;
- halt(buf);
- }
- }
- }
-
- // load and link main executable
- try {
- sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, sExecPath);
- gLinkContext.mainExecutable = sMainExecutable;
- if ( sMainExecutable->forceFlat() ) {
- gLinkContext.bindFlat = true;
- gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
- }
- link(sMainExecutable, bindness, ImageLoader::kDontRunInitializers);
- result = (uintptr_t)sMainExecutable->getMain();
- }
- catch(const char* message) {
- halt(message);
- }
- catch(...) {
- fprintf(stderr, "dyld: launch failed\n");
- }
-
-
- // Link in any inserted libraries.
- // Do this after linking main executable so any extra libraries pulled in by inserted libraries are at end of flat namespace
- if ( insertLibrariesCount > 0 ) {
- for (int i=0; i < insertLibrariesCount; ++i) {
- try {
- if ( insertedImages[i] != NULL )
- link(insertedImages[i], bindness, ImageLoader::kDontRunInitializers);
- }
- catch (const char* message) {
- char buf[strlen(sEnv.DYLD_INSERT_LIBRARIES[i])+50+strlen(message)];
- sprintf(buf, "could not link inserted library: %s\n%s\n", sEnv.DYLD_INSERT_LIBRARIES[i], message);
- halt(buf);
- }
- }
- }
-
- return result;
-}
-
-
-
-
-}; // namespace
-
-
-