src/dyldAPIs.cpp

   1 /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
   4  *
   5  * @APPLE_LICENSE_HEADER_START@
   6  *
   7  * This file contains Original Code and/or Modifications of Original Code
   8  * as defined in and that are subject to the Apple Public Source License
   9  * Version 2.0 (the 'License'). You may not use this file except in
  10  * compliance with the License. Please obtain a copy of the License at
  11  * http://www.opensource.apple.com/apsl/ and read it before using this
  12  * file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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  19  * Please see the License for the specific language governing rights and
  20  * limitations under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24
  25 //
  26 // This file implements that API's in <mach-o/dyld.h>
  27 //
  28 //
  29
  30
  31 #include <stddef.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <mach/mach.h>
  35 #include <sys/time.h>
  36
  37 extern "C" mach_port_name_t     task_self_trap(void);  // can't include <System/mach/mach_traps.h> because it is missing extern C
  38
  39 #include "mach-o/dyld_gdb.h"
  40 #include "mach-o/dyld.h"
  41 #include "mach-o/dyld_priv.h"
  42 #include "dlfcn.h"
  43
  44 #include "ImageLoader.h"
  45 #include "dyld.h"
  46 #include "dyldLibSystemThreadHelpers.h"
  47
  48 static char sLastErrorFilePath[1024];
  49 static NSLinkEditErrors sLastErrorFileCode;
  50 static int sLastErrorNo;
  51
  52
  53 // In 10.3.x and earlier all the NSObjectFileImage API's were implemeneted in libSystem.dylib
  54 // Beginning in 10.4 the NSObjectFileImage API's are implemented in dyld and libSystem just forwards
  55 // This conditional keeps support for old libSystem's which needed some help implementing the API's
  56 #define OLD_LIBSYSTEM_SUPPORT 1
  57
  58
  59 // The following functions have no prototype in any header.  They are special cases
  60 // where _dyld_func_lookup() is used directly.
  61 static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit);
  62 static NSModule _dyld_link_module(NSObjectFileImage object_addr, size_t object_size, const char* moduleName, uint32_t options);
  63 static void _dyld_register_binding_handler(void * (*)(const char *, const char *, void *), ImageLoader::BindingOptions);
  64 static void _dyld_fork_prepare();
  65 static void _dyld_fork_parent();
  66 static void _dyld_fork_child();
  67 static void _dyld_fork_child_final();
  68 static void _dyld_make_delayed_module_initializer_calls();
  69 static void _dyld_mod_term_funcs();
  70 static bool NSMakePrivateModulePublic(NSModule module);
  71 static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header);
  72 static void registerThreadHelpers(const dyld::ThreadingHelpers*);
  73 static void _dyld_update_prebinding(int pathCount, const char* paths[], uint32_t flags);
  74 static const struct dyld_all_image_infos* _dyld_get_all_image_infos();
  75
  76 // The following functions are dyld API's, but since dyld links with a static copy of libc.a
  77 // the public name cannot be used.
  78 static void             client_dyld_lookup_and_bind(const char* symbolName, void** address, NSModule* module);
  79 static bool             client_NSIsSymbolNameDefined(const char* symbolName);
  80
  81
  82 static void unimplemented()
  83 {
  84         dyld::halt("unimplemented dyld function\n");
  85 }
  86
  87 struct dyld_func {
  88     const char* name;
  89     void*               implementation;
  90 };
  91
  92 static struct dyld_func dyld_funcs[] = {
  93     {"__dyld_image_count",                                                      (void*)_dyld_image_count },
  94     {"__dyld_get_image_header",                                         (void*)_dyld_get_image_header },
  95     {"__dyld_get_image_vmaddr_slide",                           (void*)_dyld_get_image_vmaddr_slide },
  96     {"__dyld_get_image_name",                                           (void*)_dyld_get_image_name },
  97     {"__dyld_lookup_and_bind",                                          (void*)client_dyld_lookup_and_bind },
  98     {"__dyld_lookup_and_bind_with_hint",                        (void*)_dyld_lookup_and_bind_with_hint },
  99     {"__dyld_lookup_and_bind_objc",                                     (void*)unimplemented },
 100     {"__dyld_lookup_and_bind_fully",                            (void*)_dyld_lookup_and_bind_fully },
 101     {"__dyld_install_handlers",                                         (void*)_dyld_install_handlers },
 102     {"__dyld_link_edit_error",                                          (void*)NSLinkEditError },
 103 #if OLD_LIBSYSTEM_SUPPORT
 104     {"__dyld_link_module",                                                      (void*)_dyld_link_module },
 105 #endif
 106     {"__dyld_unlink_module",                                            (void*)NSUnLinkModule },
 107     {"__dyld_register_func_for_add_image",                      (void*)_dyld_register_func_for_add_image },
 108     {"__dyld_register_func_for_remove_image",           (void*)_dyld_register_func_for_remove_image },
 109     {"__dyld_register_func_for_link_module",            (void*)unimplemented },
 110     {"__dyld_register_func_for_unlink_module",          (void*)unimplemented },
 111     {"__dyld_register_func_for_replace_module",         (void*)unimplemented },
 112     {"__dyld_get_objc_module_sect_for_module",          (void*)unimplemented },
 113     {"__dyld_bind_objc_module",                                         (void*)_dyld_bind_objc_module },
 114     {"__dyld_bind_fully_image_containing_address",  (void*)_dyld_bind_fully_image_containing_address },
 115     {"__dyld_image_containing_address",                         (void*)_dyld_image_containing_address },
 116     {"__dyld_get_image_header_containing_address",  (void*)_dyld_get_image_header_containing_address },
 117     {"__dyld_moninit",                                                          (void*)_dyld_moninit },
 118     {"__dyld_register_binding_handler",                                         (void*)_dyld_register_binding_handler },
 119     {"__dyld_fork_prepare",                                                     (void*)_dyld_fork_prepare },
 120     {"__dyld_fork_parent",                                                      (void*)_dyld_fork_parent },
 121     {"__dyld_fork_child",                                                       (void*)_dyld_fork_child },
 122     {"__dyld_fork_child_final",                                         (void*)_dyld_fork_child_final },
 123     {"__dyld_fork_mach_init",                                           (void*)unimplemented },
 124     {"__dyld_make_delayed_module_initializer_calls",(void*)_dyld_make_delayed_module_initializer_calls },
 125     {"__dyld_NSNameOfSymbol",                                           (void*)NSNameOfSymbol },
 126     {"__dyld_NSAddressOfSymbol",                                        (void*)NSAddressOfSymbol },
 127     {"__dyld_NSModuleForSymbol",                                        (void*)NSModuleForSymbol },
 128     {"__dyld_NSLookupAndBindSymbol",                            (void*)NSLookupAndBindSymbol },
 129     {"__dyld_NSLookupAndBindSymbolWithHint",            (void*)NSLookupAndBindSymbolWithHint },
 130     {"__dyld_NSLookupSymbolInModule",                           (void*)NSLookupSymbolInModule},
 131     {"__dyld_NSLookupSymbolInImage",                            (void*)NSLookupSymbolInImage},
 132     {"__dyld_NSMakePrivateModulePublic",                        (void*)NSMakePrivateModulePublic},
 133     {"__dyld_NSIsSymbolNameDefined",                            (void*)client_NSIsSymbolNameDefined},
 134     {"__dyld_NSIsSymbolNameDefinedWithHint",            (void*)NSIsSymbolNameDefinedWithHint },
 135     {"__dyld_NSIsSymbolNameDefinedInImage",                     (void*)NSIsSymbolNameDefinedInImage},
 136     {"__dyld_NSNameOfModule",                                           (void*)NSNameOfModule },
 137     {"__dyld_NSLibraryNameForModule",                           (void*)NSLibraryNameForModule },
 138     {"__dyld_NSAddLibrary",                                                     (void*)NSAddLibrary },
 139     {"__dyld_NSAddLibraryWithSearching",                        (void*)NSAddLibraryWithSearching },
 140     {"__dyld_NSAddImage",                                                       (void*)NSAddImage },
 141     {"__dyld__NSGetExecutablePath",                                     (void*)_NSGetExecutablePath },
 142     {"__dyld_launched_prebound",                                        (void*)_dyld_launched_prebound },
 143     {"__dyld_all_twolevel_modules_prebound",            (void*)_dyld_all_twolevel_modules_prebound },
 144     {"__dyld_call_module_initializers_for_dylib",   (void*)_dyld_call_module_initializers_for_dylib },
 145     {"__dyld_mod_term_funcs",                                           (void*)_dyld_mod_term_funcs },
 146     {"__dyld_install_link_edit_symbol_handlers",        (void*)dyld::registerZeroLinkHandlers },
 147     {"__dyld_NSCreateObjectFileImageFromFile",                  (void*)NSCreateObjectFileImageFromFile },
 148     {"__dyld_NSCreateObjectFileImageFromMemory",                (void*)NSCreateObjectFileImageFromMemory },
 149     {"__dyld_NSCreateCoreFileImageFromFile",                    (void*)unimplemented },
 150     {"__dyld_NSDestroyObjectFileImage",                                 (void*)NSDestroyObjectFileImage },
 151     {"__dyld_NSLinkModule",                                                             (void*)NSLinkModule },
 152     {"__dyld_NSHasModInitObjectFileImage",                              (void*)NSHasModInitObjectFileImage },
 153     {"__dyld_NSSymbolDefinitionCountInObjectFileImage", (void*)NSSymbolDefinitionCountInObjectFileImage },
 154     {"__dyld_NSSymbolDefinitionNameInObjectFileImage",  (void*)NSSymbolDefinitionNameInObjectFileImage },
 155     {"__dyld_NSIsSymbolDefinedInObjectFileImage",               (void*)NSIsSymbolDefinedInObjectFileImage },
 156     {"__dyld_NSSymbolReferenceNameInObjectFileImage",   (void*)NSSymbolReferenceNameInObjectFileImage },
 157     {"__dyld_NSSymbolReferenceCountInObjectFileImage",  (void*)NSSymbolReferenceCountInObjectFileImage },
 158     {"__dyld_NSGetSectionDataInObjectFileImage",                (void*)NSGetSectionDataInObjectFileImage },
 159     {"__dyld_NSFindSectionAndOffsetInObjectFileImage",  (void*)NSFindSectionAndOffsetInObjectFileImage },
 160         {"__dyld_register_thread_helpers",                                      (void*)registerThreadHelpers },
 161     {"__dyld_dladdr",                                                                   (void*)dladdr },
 162     {"__dyld_dlclose",                                                                  (void*)dlclose },
 163     {"__dyld_dlerror",                                                                  (void*)dlerror },
 164     {"__dyld_dlopen",                                                                   (void*)dlopen },
 165     {"__dyld_dlsym",                                                                    (void*)dlsym },
 166         {"__dyld_update_prebinding",                                            (void*)_dyld_update_prebinding },
 167         {"__dyld_get_all_image_infos",                                          (void*)_dyld_get_all_image_infos },
 168     {NULL, 0}
 169 };
 170
 171
 172
 173 // dyld's abstract type NSSymbol is implemented as const ImageLoader::Symbol*
 174 inline NSSymbol SymbolToNSSymbol(const ImageLoader::Symbol* sym)
 175 {
 176         return (NSSymbol)sym;
 177 }
 178 inline const ImageLoader::Symbol* NSSymbolToSymbol(NSSymbol sym)
 179 {
 180         return (const ImageLoader::Symbol*)sym;
 181 }
 182
 183 // dyld's abstract type NSModule is implemented as ImageLoader*
 184 inline NSModule ImageLoaderToNSModule(ImageLoader* image)
 185 {
 186         return (NSModule)image;
 187 }
 188 inline ImageLoader* NSModuleToImageLoader(NSModule module)
 189 {
 190         ImageLoader* image = (ImageLoader*)module;
 191         if ( dyld::validImage(image) )
 192                 return image;
 193         return NULL;
 194 }
 195
 196 // actual definition for opaque type
 197 struct __NSObjectFileImage
 198 {
 199         ImageLoader*    image;
 200         const void*             imageBaseAddress;       // not used with OFI created from files
 201         size_t                  imageLength;            // not used with OFI created from files
 202 };
 203 static std::vector<NSObjectFileImage> sObjectFileImages;
 204
 205
 206
 207 //
 208 // __NSObjectFileImage are deleted in NSDestroyObjectFileImage()
 209 // The contained image is delete in one of two places:
 210 //      NSUnLinkModule deletes the image if there is no __NSObjectFileImage with a reference to it
 211 //      NSDestroyObjectFileImage deletes the image if image is not in list of valid images
 212 //
 213
 214
 215 static void dyldAPIhalt(const char* apiName, const char* errorMsg)
 216 {
 217         fprintf(stderr, "dyld: %s() error\n", apiName);
 218         dyld::halt(errorMsg);
 219 }
 220
 221
 222
 223 static void setLastError(NSLinkEditErrors code, int errnum, const char* file, const char* message)
 224 {
 225         dyld::setErrorMessage(message);
 226         strncpy(sLastErrorFilePath, file, 1024);
 227         sLastErrorFilePath[1023] = '\0';
 228         sLastErrorFileCode = code;
 229         sLastErrorNo = errnum;
 230 }
 231
 232
 233 /*
 234  *_dyld_NSGetExecutablePath is the dyld side of _NSGetExecutablePath which
 235  * copies the path of the executable into the buffer and returns 0 if the path
 236  * was successfully copied in the provided buffer. If the buffer is not large
 237  * enough, -1 is returned and the expected buffer size is copied in *bufsize.
 238  * Note that _NSGetExecutablePath will return "a path" to the executable not a
 239  * "real path" to the executable. That is the path may be a symbolic link and
 240  * not the real file. And with deep directories the total bufsize needed could
 241  * be more than MAXPATHLEN.
 242  */
 243 int _NSGetExecutablePath(char* buf, uint32_t *bufsize)
 244 {
 245         if ( dyld::gLogAPIs )
 246                 fprintf(stderr, "%s(...)\n", __func__);
 247         const char* exePath = dyld::getExecutablePath();
 248         if(*bufsize < strlen(exePath) + 1){
 249             *bufsize = strlen(exePath) + 1;
 250             return -1;
 251         }
 252         strcpy(buf, exePath);
 253         return 0;
 254 }
 255
 256
 257 //
 258 // _dyld_call_module_initializers_for_dylib() is the dyld side of
 259 // __initialize_Cplusplus() which is in dylib1.o.
 260 // It is intended to only be called inside -init rouintes.
 261 // -init routines are called before module initializers (what C++
 262 // initializers use).  Calling __initialize_Cplusplus() in a -init
 263 // routine causes the module initializers for an image to be called
 264 // which then allows C++ to be used inside a -init routine
 265 //
 266 static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header)
 267 {
 268         if ( dyld::gLogAPIs )
 269                 fprintf(stderr, "__initialize_Cplusplus()\n");
 270
 271         // for now, do nothing...
 272 }
 273
 274
 275 void _dyld_lookup_and_bind_fully(const char* symbolName, void** address, NSModule* module)
 276 {
 277         if ( dyld::gLogAPIs )
 278                 fprintf(stderr, "%s(\"%s\", %p, %p)\n", __func__, symbolName, address, module);
 279         ImageLoader* image;
 280         const ImageLoader::Symbol* sym;
 281         dyld::clearErrorMessage();
 282         if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
 283                 try {
 284                         dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
 285                         if ( address != NULL)
 286                                 *address = (void*)image->getExportedSymbolAddress(sym);
 287                         if ( module != NULL)
 288                                 *module = ImageLoaderToNSModule(image);
 289                 }
 290                 catch (const char* msg) {
 291                         dyldAPIhalt(__func__, msg);
 292                 }
 293         }
 294         else {
 295                 // on failure to find symbol return NULLs
 296                 if ( address != NULL)
 297                         *address = NULL;
 298                 if ( module != NULL)
 299                         *module = NULL;
 300         }
 301 }
 302
 303 // Note: This cannot have public name because dyld is built with a static copy of libc.a
 304 // which calls dyld_lookup_and_bind() and expects to find dyld's symbols not host process
 305 static void client_dyld_lookup_and_bind(const char* symbolName, void** address, NSModule* module)
 306 {
 307         if ( dyld::gLogAPIs )
 308                 fprintf(stderr, "_dyld_lookup_and_bind(\"%s\", %p, %p)\n", symbolName, address, module);
 309         ImageLoader* image;
 310         const ImageLoader::Symbol* sym;
 311         if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
 312                 if ( address != NULL)
 313                         *address = (void*)image->getExportedSymbolAddress(sym);
 314                 if ( module != NULL)
 315                         *module = ImageLoaderToNSModule(image);
 316         }
 317         else {
 318                 // on failure to find symbol return NULLs
 319                 if ( address != NULL)
 320                         *address = NULL;
 321                 if ( module != NULL)
 322                         *module = NULL;
 323         }
 324 }
 325
 326 void _dyld_lookup_and_bind_with_hint(const char* symbolName, const char* library_name_hint, void** address, NSModule* module)
 327 {
 328         if ( dyld::gLogAPIs )
 329                 fprintf(stderr, "%s(\"%s\", \"%s\", %p, %p)\n", __func__, symbolName, library_name_hint, address, module);
 330         ImageLoader* image;
 331         const ImageLoader::Symbol* sym;
 332         // Look for library whose path contains the hint.  If that fails search everywhere
 333         if (  dyld::flatFindExportedSymbolWithHint(symbolName, library_name_hint, &sym, &image)
 334           ||  dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
 335                 if ( address != NULL)
 336                         *address = (void*)image->getExportedSymbolAddress(sym);
 337                 if ( module != NULL)
 338                         *module = ImageLoaderToNSModule(image);
 339         }
 340         else {
 341                 // on failure to find symbol return NULLs
 342                 if ( address != NULL)
 343                         *address = NULL;
 344                 if ( module != NULL)
 345                         *module = NULL;
 346         }
 347 }
 348
 349
 350 NSSymbol NSLookupAndBindSymbol(const char *symbolName)
 351 {
 352         if ( dyld::gLogAPIs )
 353                 fprintf(stderr, "%s(\"%s\")\n", __func__, symbolName);
 354         ImageLoader* image;
 355         const ImageLoader::Symbol* sym;
 356         if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
 357                 return SymbolToNSSymbol(sym);
 358         }
 359         // return NULL on failure
 360         return NULL;
 361 }
 362
 363 NSSymbol NSLookupAndBindSymbolWithHint(const char* symbolName, const char* libraryNameHint)
 364 {
 365         if ( dyld::gLogAPIs )
 366                 fprintf(stderr, "%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
 367         ImageLoader* image;
 368         const ImageLoader::Symbol* sym;
 369         bool found = dyld::flatFindExportedSymbolWithHint(symbolName, libraryNameHint, &sym, &image);
 370         if ( ! found ) {
 371                 // hint failed, do slow search of all images
 372                  found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
 373         }
 374         if ( found )
 375                 return SymbolToNSSymbol(sym);
 376
 377         // return NULL on failure and log
 378         if ( dyld::gLogAPIs )
 379                 fprintf(stderr, "%s(\"%s\", \"%s\") => NULL \n", __func__, symbolName, libraryNameHint);
 380         return NULL;
 381 }
 382
 383 uint32_t _dyld_image_count(void)
 384 {
 385         if ( dyld::gLogAPIs )
 386                 fprintf(stderr, "%s()\n", __func__);
 387         return dyld::getImageCount();
 388 }
 389
 390 const struct mach_header* _dyld_get_image_header(uint32_t image_index)
 391 {
 392         if ( dyld::gLogAPIs )
 393                 fprintf(stderr, "%s(%u)\n", __func__, image_index);
 394         ImageLoader* image = dyld::getIndexedImage(image_index);
 395         if ( image != NULL )
 396                 return (struct mach_header*)image->machHeader();
 397         else
 398                 return NULL;
 399 }
 400
 401
 402 static __attribute__((noinline))
 403 const struct mach_header* addImage(const char* path, bool search, bool dontLoad, bool matchInstallName, bool abortOnError)
 404 {
 405         ImageLoader*    image = NULL;
 406         try {
 407                 dyld::clearErrorMessage();
 408                 void* callerAddress = __builtin_return_address(2); // note layers: 2: real client, 1: libSystem glue, 0: dyld API
 409                 ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
 410                 dyld::LoadContext context;
 411                 context.useSearchPaths          = search;
 412                 context.useLdLibraryPath        = false;
 413                 context.matchByInstallName      = matchInstallName;
 414                 context.dontLoad                        = dontLoad;
 415                 context.mustBeBundle            = false;
 416                 context.mustBeDylib                     = true;
 417                 context.origin                          = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
 418                 context.rpath                           = NULL; // support not yet implemented
 419
 420                 image = load(path, context);
 421                 if ( image != NULL ) {
 422                         if ( context.matchByInstallName )
 423                                 image->setMatchInstallPath(true);
 424                         dyld::link(image, ImageLoader::kNonLazyOnly, ImageLoader::kRunInitializers);
 425                         return image->machHeader();
 426                 }
 427         }
 428         catch (const char* msg) {
 429                 if ( abortOnError) {
 430                         char pathMsg[strlen(msg)+strlen(path)+4];
 431                         strcpy(pathMsg, msg);
 432                         strcat(pathMsg, " ");
 433                         strcat(pathMsg, path);
 434                         dyldAPIhalt("NSAddImage", pathMsg);
 435                 }
 436                 // not halting, so set error state for NSLinkEditError to find
 437                 setLastError(NSLinkEditOtherError, 0, path, msg);
 438         }
 439         return NULL;
 440 }
 441
 442 const struct mach_header* NSAddImage(const char* path, uint32_t options)
 443 {
 444         if ( dyld::gLogAPIs )
 445                 fprintf(stderr, "%s(\"%s\", 0x%08X)\n", __func__, path, options);
 446         const bool dontLoad = ( (options & NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED) != 0 );
 447         const bool search = ( (options & NSADDIMAGE_OPTION_WITH_SEARCHING) != 0 );
 448         const bool matchInstallName = ( (options & NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME) != 0 );
 449         const bool abortOnError = ( (options & NSADDIMAGE_OPTION_RETURN_ON_ERROR) == 0 );
 450         return addImage(path, search, dontLoad, matchInstallName, abortOnError);
 451 }
 452
 453 bool NSAddLibrary(const char* path)
 454 {
 455         if ( dyld::gLogAPIs )
 456                 fprintf(stderr, "%s(\"%s\")\n", __func__, path);
 457         return (addImage(path, false, false, false, false) != NULL);
 458 }
 459
 460 bool NSAddLibraryWithSearching(const char* path)
 461 {
 462         if ( dyld::gLogAPIs )
 463                 fprintf(stderr, "%s(\"%s\")\n", __func__, path);
 464         return (addImage(path, true, false, false, false) != NULL);
 465 }
 466
 467
 468
 469 //#define NSADDIMAGE_OPTION_NONE                        0x0
 470 //#define NSADDIMAGE_OPTION_RETURN_ON_ERROR             0x1
 471 //#define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME       0x8
 472
 473 bool NSIsSymbolNameDefinedInImage(const struct mach_header* mh, const char* symbolName)
 474 {
 475         if ( dyld::gLogAPIs )
 476                 fprintf(stderr, "%s(%p, \"%s\")\n", __func__, (void *)mh, symbolName);
 477         ImageLoader* image = dyld::findImageByMachHeader(mh);
 478         if ( image != NULL ) {
 479                 if ( image->findExportedSymbol(symbolName, NULL, true, NULL) != NULL)
 480                         return true;
 481         }
 482         return false;
 483 }
 484
 485 NSSymbol NSLookupSymbolInImage(const struct mach_header* mh, const char* symbolName, uint32_t options)
 486 {
 487         if ( dyld::gLogAPIs )
 488                 fprintf(stderr, "%s(%p, \"%s\", 0x%08X)\n", __func__, mh, symbolName, options);
 489         const ImageLoader::Symbol* symbol = NULL;
 490         dyld::clearErrorMessage();
 491         ImageLoader* image = dyld::findImageByMachHeader(mh);
 492         if ( image != NULL ) {
 493                 try {
 494                         if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY ) {
 495                                 dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
 496                         }
 497                         else if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW ) {
 498                                 dyld::link(image, ImageLoader::kLazyOnlyNoDependents, ImageLoader::kDontRunInitializers);
 499                         }
 500                 }
 501                 catch (const char* msg) {
 502                         if ( (options & NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR) == 0 ) {
 503                                 dyldAPIhalt(__func__, msg);
 504                         }
 505                 }
 506                 symbol = image->findExportedSymbol(symbolName, NULL, true, NULL);
 507         }
 508         if ( dyld::gLogAPIs && (symbol == NULL) )
 509                 fprintf(stderr, "%s(%p, \"%s\", 0x%08X) ==> NULL\n", __func__, mh, symbolName, options);
 510         return SymbolToNSSymbol(symbol);
 511 }
 512
 513
 514 // Note: This cannot have public name because dyld is built with a static copy of libc.a
 515 // which calls NSIsSymbolNameDefined() and expects to find dyld's symbols not host process
 516 static bool client_NSIsSymbolNameDefined(const char* symbolName)
 517 {
 518         if ( dyld::gLogAPIs )
 519                 fprintf(stderr, "NSIsSymbolNameDefined(\"%s\")\n", symbolName);
 520         ImageLoader* image;
 521         const ImageLoader::Symbol* sym;
 522         return dyld::flatFindExportedSymbol(symbolName, &sym, &image);
 523 }
 524
 525 bool NSIsSymbolNameDefinedWithHint(const char* symbolName, const char* libraryNameHint)
 526 {
 527         if ( dyld::gLogAPIs )
 528                 fprintf(stderr, "%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
 529         ImageLoader* image;
 530         const ImageLoader::Symbol* sym;
 531         bool found = dyld::flatFindExportedSymbolWithHint(symbolName, libraryNameHint, &sym, &image);
 532         if ( ! found ) {
 533                 // hint failed, do slow search of all images
 534                  found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
 535         }
 536         if ( !found && dyld::gLogAPIs )
 537                 fprintf(stderr, "%s(\"%s\", \"%s\") => false \n", __func__, symbolName, libraryNameHint);
 538         return found;
 539 }
 540
 541 const char* NSNameOfSymbol(NSSymbol symbol)
 542 {
 543         if ( dyld::gLogAPIs )
 544                 fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
 545         const char* result = NULL;
 546         ImageLoader* image = dyld::findImageContainingAddress(symbol);
 547         if ( image != NULL )
 548                 result = image->getExportedSymbolName(NSSymbolToSymbol(symbol));
 549         return result;
 550 }
 551
 552 void* NSAddressOfSymbol(NSSymbol symbol)
 553 {
 554         if ( dyld::gLogAPIs )
 555                 fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
 556         void* result = NULL;
 557         ImageLoader* image = dyld::findImageContainingAddress(symbol);
 558         if ( image != NULL )
 559                 result = (void*)image->getExportedSymbolAddress(NSSymbolToSymbol(symbol));
 560         return result;
 561 }
 562
 563 NSModule NSModuleForSymbol(NSSymbol symbol)
 564 {
 565         if ( dyld::gLogAPIs )
 566                 fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
 567         NSModule result = NULL;
 568         ImageLoader* image = dyld::findImageContainingAddress(symbol);
 569         if ( image != NULL )
 570                 result = ImageLoaderToNSModule(image);
 571         return result;
 572 }
 573
 574
 575 intptr_t _dyld_get_image_vmaddr_slide(uint32_t image_index)
 576 {
 577         if ( dyld::gLogAPIs )
 578                 fprintf(stderr, "%s(%u)\n", __func__, image_index);
 579         ImageLoader* image = dyld::getIndexedImage(image_index);
 580         if ( image != NULL )
 581                 return image->getSlide();
 582         else
 583                 return 0;
 584 }
 585
 586 const char* _dyld_get_image_name(uint32_t image_index)
 587 {
 588         if ( dyld::gLogAPIs )
 589                 fprintf(stderr, "%s(%u)\n", __func__, image_index);
 590         ImageLoader* image = dyld::getIndexedImage(image_index);
 591         if ( image != NULL )
 592                 return image->getLogicalPath();
 593         else
 594                 return NULL;
 595 }
 596
 597
 598
 599 bool _dyld_all_twolevel_modules_prebound(void)
 600 {
 601         if ( dyld::gLogAPIs )
 602                 fprintf(stderr, "%s()\n", __func__);
 603         return FALSE; // fixme
 604 }
 605
 606 void _dyld_bind_objc_module(const void *objc_module)
 607 {
 608         if ( dyld::gLogAPIs )
 609                 fprintf(stderr, "%s(%p)\n", __func__, objc_module);
 610         // do nothing, with new dyld everything already bound
 611 }
 612
 613
 614 bool _dyld_bind_fully_image_containing_address(const void* address)
 615 {
 616         if ( dyld::gLogAPIs )
 617                 fprintf(stderr, "%s(%p)\n", __func__, address);
 618         dyld::clearErrorMessage();
 619         ImageLoader* image = dyld::findImageContainingAddress(address);
 620         if ( image != NULL ) {
 621                 try {
 622                         dyld::link(image, ImageLoader::kLazyAndNonLazy, ImageLoader::kDontRunInitializers);
 623                         return true;
 624                 }
 625                 catch (const char* msg) {
 626                         dyldAPIhalt(__func__, msg);
 627                 }
 628         }
 629         return false;
 630 }
 631
 632 bool _dyld_image_containing_address(const void* address)
 633 {
 634         if ( dyld::gLogAPIs )
 635                 fprintf(stderr, "%s(%p)\n", __func__, address);
 636         ImageLoader *imageLoader = dyld::findImageContainingAddress(address);
 637         return (NULL != imageLoader);
 638 }
 639
 640 static NSObjectFileImage createObjectImageFile(ImageLoader* image, const void* address = NULL, size_t len=0)
 641 {
 642         NSObjectFileImage result = new __NSObjectFileImage();
 643         result->image = image;
 644         result->imageBaseAddress = address;
 645         result->imageLength = len;
 646         sObjectFileImages.push_back(result);
 647         return result;
 648 }
 649
 650 NSObjectFileImageReturnCode NSCreateObjectFileImageFromFile(const char* pathName, NSObjectFileImage *objectFileImage)
 651 {
 652         if ( dyld::gLogAPIs )
 653                 fprintf(stderr, "%s(\"%s\", ...)\n", __func__, pathName);
 654         try {
 655                 void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
 656                 ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
 657
 658                 dyld::LoadContext context;
 659                 context.useSearchPaths          = false;
 660                 context.useLdLibraryPath        = false;
 661                 context.matchByInstallName      = false;
 662                 context.dontLoad                        = false;
 663                 context.mustBeBundle            = true;
 664                 context.mustBeDylib                     = false;
 665                 context.origin                          = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
 666                 context.rpath                           = NULL; // support not yet implemented
 667
 668                 ImageLoader* image = dyld::load(pathName, context);
 669                 // Note:  We DO NOT link the image!  NSLinkModule will do that
 670                 if ( image != NULL ) {
 671                         if ( !image->isBundle() ) {
 672                                 // the image must have been already loaded (since context.mustBeBundle will prevent it from being loaded)
 673                                 return NSObjectFileImageInappropriateFile;
 674                         }
 675                         *objectFileImage = createObjectImageFile(image);
 676                         return NSObjectFileImageSuccess;
 677                 }
 678         }
 679         catch (const char* msg) {
 680                 //fprintf(stderr, "dyld: NSCreateObjectFileImageFromFile() error: %s\n", msg);
 681                 return NSObjectFileImageInappropriateFile;
 682         }
 683         return NSObjectFileImageFailure;
 684 }
 685
 686
 687 NSObjectFileImageReturnCode NSCreateObjectFileImageFromMemory(const void* address, size_t size, NSObjectFileImage *objectFileImage)
 688 {
 689         if ( dyld::gLogAPIs )
 690                 fprintf(stderr, "%s(%p, %lu, %p)\n", __func__, address, size, objectFileImage);
 691
 692         try {
 693                 ImageLoader* image = dyld::loadFromMemory((const uint8_t*)address, size, NULL);
 694                 if ( ! image->isBundle() ) {
 695                         // this API can only be used with bundles...
 696                         delete image;
 697                         return NSObjectFileImageInappropriateFile;
 698                 }
 699                 // Note:  We DO NOT link the image!  NSLinkModule will do that
 700                 if ( image != NULL ) {
 701                         *objectFileImage = createObjectImageFile(image, address, size);
 702                         return NSObjectFileImageSuccess;
 703                 }
 704         }
 705         catch (const char* msg) {
 706                 fprintf(stderr, "dyld: NSCreateObjectFileImageFromMemory() error: %s\n", msg);
 707         }
 708         return NSObjectFileImageFailure;
 709 }
 710
 711 static bool validOFI(NSObjectFileImage objectFileImage)
 712 {
 713         const int ofiCount = sObjectFileImages.size();
 714         for (int i=0; i < ofiCount; ++i) {
 715                 if ( sObjectFileImages[i] == objectFileImage )
 716                         return true;
 717         }
 718         return false;
 719 }
 720
 721 bool NSDestroyObjectFileImage(NSObjectFileImage objectFileImage)
 722 {
 723         if ( dyld::gLogAPIs )
 724                 fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
 725
 726         if ( validOFI(objectFileImage) ) {
 727                 // if the image has never been linked or has been unlinked, the image is not in the list of valid images
 728                 // and we should delete it
 729                 bool linkedImage = dyld::validImage(objectFileImage->image);
 730                 if ( ! linkedImage )
 731                         delete objectFileImage->image;
 732
 733                 // remove from list of ofi's
 734                 for (std::vector<NSObjectFileImage>::iterator it=sObjectFileImages.begin(); it != sObjectFileImages.end(); it++) {
 735                         if ( *it == objectFileImage ) {
 736                                 sObjectFileImages.erase(it);
 737                                 break;
 738                         }
 739                 }
 740
 741                 // if object was created from a memory, release that memory
 742                 // NOTE: this is the way dyld has always done this. NSCreateObjectFileImageFromMemory() hands over ownership of the memory to dyld
 743                 if ( objectFileImage->imageBaseAddress != NULL ) {
 744                         vm_deallocate(mach_task_self(), (vm_address_t)objectFileImage->imageBaseAddress, objectFileImage->imageLength);
 745                 }
 746
 747                 // free ofi object
 748                 delete objectFileImage;
 749
 750                 return true;
 751         }
 752         return false;
 753 }
 754
 755 bool NSHasModInitObjectFileImage(NSObjectFileImage objectFileImage)
 756 {
 757         if ( dyld::gLogAPIs )
 758                 fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
 759         return objectFileImage->image->needsInitialization();
 760 }
 761
 762 uint32_t NSSymbolDefinitionCountInObjectFileImage(NSObjectFileImage objectFileImage)
 763 {
 764         if ( dyld::gLogAPIs )
 765                 fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
 766         return objectFileImage->image->getExportedSymbolCount();
 767 }
 768
 769 const char* NSSymbolDefinitionNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal)
 770 {
 771         if ( dyld::gLogAPIs )
 772                 fprintf(stderr, "%s(%p,%d)\n", __func__, objectFileImage, ordinal);
 773         const ImageLoader::Symbol* sym = objectFileImage->image->getIndexedExportedSymbol(ordinal);
 774         return objectFileImage->image->getExportedSymbolName(sym);
 775 }
 776
 777 uint32_t NSSymbolReferenceCountInObjectFileImage(NSObjectFileImage objectFileImage)
 778 {
 779         if ( dyld::gLogAPIs )
 780                 fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
 781         return objectFileImage->image->getImportedSymbolCount();
 782 }
 783
 784 const char * NSSymbolReferenceNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal,
 785                                                                                                         bool* tentative_definition)
 786 {
 787         if ( dyld::gLogAPIs )
 788                 fprintf(stderr, "%s(%p,%d)\n", __func__, objectFileImage, ordinal);
 789         const ImageLoader::Symbol* sym = objectFileImage->image->getIndexedImportedSymbol(ordinal);
 790         if ( tentative_definition != NULL ) {
 791                 ImageLoader::ReferenceFlags flags = objectFileImage->image->geImportedSymbolInfo(sym);
 792                 if ( (flags & ImageLoader::kTentativeDefinition) != 0 )
 793                         *tentative_definition = true;
 794                 else
 795                         *tentative_definition = false;
 796         }
 797         return objectFileImage->image->getImportedSymbolName(sym);
 798 }
 799
 800 void* NSGetSectionDataInObjectFileImage(NSObjectFileImage objectFileImage,
 801                                                                                 const char* segmentName, const char* sectionName, unsigned long* size)
 802 {
 803         if ( dyld::gLogAPIs )
 804                 fprintf(stderr, "%s(%p,%s, %s)\n", __func__, objectFileImage, segmentName, sectionName);
 805
 806         void* start;
 807         size_t length;
 808         if ( objectFileImage->image->getSectionContent(segmentName, sectionName, &start, &length) ) {
 809                 if ( size != NULL )
 810                         *size = length;
 811                 return start;
 812         }
 813         return NULL;
 814 }
 815
 816
 817
 818 bool NSIsSymbolDefinedInObjectFileImage(NSObjectFileImage objectFileImage, const char* symbolName)
 819 {
 820         if ( dyld::gLogAPIs )
 821                 fprintf(stderr, "%s(%p,%s)\n", __func__, objectFileImage, symbolName);
 822         const ImageLoader::Symbol* sym = objectFileImage->image->findExportedSymbol(symbolName, NULL, true, NULL);
 823         return ( sym != NULL );
 824 }
 825
 826 /*
 827  * Given an imageOffset into an ObjectFileImage, returns
 828  * the segment/section name and offset into that section of
 829  * that imageOffset.  Returns FALSE if the imageOffset is not
 830  * in any section.  You can used the resulting sectionOffset to
 831  * index into the data returned by NSGetSectionDataInObjectFileImage.
 832  *
 833  * First appeared in Mac OS X 10.3
 834  *
 835  * SPI: currently only used by ZeroLink to detect +load methods
 836  */
 837 bool
 838 NSFindSectionAndOffsetInObjectFileImage(NSObjectFileImage objectFileImage,
 839                                                                                 unsigned long imageOffset,
 840                                                                                 const char** segmentName,       /* can be NULL */
 841                                                                                 const char** sectionName,       /* can be NULL */
 842                                                                                 unsigned long* sectionOffset)   /* can be NULL */
 843 {
 844         if ( dyld::gLogAPIs )
 845                 fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
 846
 847         return objectFileImage->image->findSection((char*)(objectFileImage->image->getBaseAddress())+imageOffset, segmentName, sectionName, sectionOffset);
 848 }
 849
 850
 851
 852 NSModule NSLinkModule(NSObjectFileImage objectFileImage, const char* moduleName, uint32_t options)
 853 {
 854         if ( dyld::gLogAPIs )
 855                 fprintf(stderr, "%s(%p, \"%s\", 0x%08X)\n", __func__, objectFileImage, moduleName, options);
 856
 857         dyld::clearErrorMessage();
 858         try {
 859                 // NSLinkModule allows a bundle to be link multpile times
 860                 // each link causes the bundle to be copied to a new address
 861                 if ( objectFileImage->image->isLinked() ) {
 862                         // already linked, so clone a new one and link it
 863 #if 0
 864                         fprintf(stderr, "dyld: warning: %s(0x%08X, \"%s\", 0x%08X) called more than once for 0x%08X\n",
 865                                         __func__, objectFileImage, moduleName, options, objectFileImage);
 866 #endif
 867                         objectFileImage->image = dyld::cloneImage(objectFileImage->image);
 868                 }
 869
 870                 // if this ofi was made with NSCreateObjectFileImageFromFile() then physical path is already set
 871                 // if this ofi was create with NSCreateObjectFileImageFromMemory() then the phyiscal path should be set if supplied
 872                 if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 ) {
 873                         if ( objectFileImage->imageBaseAddress != NULL ) {
 874                                 const char* physEnd = &moduleName[strlen(moduleName)+1];
 875                                 objectFileImage->image->setPath(physEnd);
 876                         }
 877                 }
 878
 879                 // set moduleName as the name anyone calling _dyld_get_image_name() will see
 880                 objectFileImage->image->setLogicalPath(moduleName);
 881
 882                 // support private bundles
 883                 if ( (options & NSLINKMODULE_OPTION_PRIVATE) != 0 )
 884                         objectFileImage->image->setHideExports();
 885
 886                 // set up linking options
 887                 ImageLoader::BindingLaziness bindness = ImageLoader::kNonLazyOnly;
 888                 if ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 )
 889                         bindness = ImageLoader::kLazyAndNonLazy;
 890                 ImageLoader::InitializerRunning runInitializers = ImageLoader::kRunInitializers;
 891                 if ( (options & NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES) != 0 )
 892                         runInitializers = ImageLoader::kDontRunInitializersButTellObjc;
 893
 894                 // load libraries, rebase, bind, to make this image usable
 895                 dyld::link(objectFileImage->image, bindness, runInitializers);
 896
 897                 return ImageLoaderToNSModule(objectFileImage->image);
 898         }
 899         catch (const char* msg) {
 900                 if ( (options & NSLINKMODULE_OPTION_RETURN_ON_ERROR) == 0 )
 901                         dyldAPIhalt(__func__, msg);
 902                 // not halting, so set error state for NSLinkEditError to find
 903                 dyld::removeImage(objectFileImage->image);
 904                 setLastError(NSLinkEditOtherError, 0, moduleName, msg);
 905                 return NULL;
 906         }
 907 }
 908
 909 #if OLD_LIBSYSTEM_SUPPORT
 910 // This is for compatibility with old libSystems (libdyld.a) which process ObjectFileImages outside dyld
 911 static NSModule _dyld_link_module(NSObjectFileImage object_addr, size_t object_size, const char* moduleName, uint32_t options)
 912 {
 913         if ( dyld::gLogAPIs )
 914                 fprintf(stderr, "%s(%p, \"%s\", 0x%08X)\n", "NSLinkModule", object_addr,  moduleName, options); // note name/args translation
 915         ImageLoader* image = NULL;
 916         dyld::clearErrorMessage();
 917         try {
 918                 const char* imageName = moduleName;
 919                 if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 )
 920                         imageName = &moduleName[strlen(moduleName)+1];
 921
 922                 image = dyld::loadFromMemory((const uint8_t*)object_addr, object_size, imageName);
 923
 924                 if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 )
 925                         image->setLogicalPath(moduleName);
 926
 927                 if ( image != NULL ) {
 928                         // support private bundles
 929                         if ( (options & NSLINKMODULE_OPTION_PRIVATE) != 0 )
 930                                 image->setHideExports();
 931
 932                         // set up linking options
 933                         ImageLoader::BindingLaziness bindness = ImageLoader::kNonLazyOnly;
 934                         if ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 )
 935                                 bindness = ImageLoader::kLazyAndNonLazy;
 936                         ImageLoader::InitializerRunning runInitializers = ImageLoader::kRunInitializers;
 937                         if ( (options & NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES) != 0 )
 938                                 runInitializers = ImageLoader::kDontRunInitializersButTellObjc;
 939
 940                         // load libraries, rebase, bind, to make this image usable
 941                         dyld::link(image, bindness, runInitializers);
 942                 }
 943         }
 944         catch (const char* msg) {
 945                 if ( (options & NSLINKMODULE_OPTION_RETURN_ON_ERROR) == 0 )
 946                         dyldAPIhalt("NSLinkModule", msg);
 947                 // not halting, so set error state for NSLinkEditError to find
 948                 setLastError(NSLinkEditOtherError, 0, moduleName, msg);
 949                 // if image was created for this bundle, destroy it
 950                 if ( image != NULL ) {
 951                         dyld::removeImage(image);
 952                         delete image;
 953                 }
 954                 image = NULL;
 955         }
 956         return ImageLoaderToNSModule(image);
 957 }
 958 #endif
 959
 960 NSSymbol NSLookupSymbolInModule(NSModule module, const char* symbolName)
 961 {
 962         if ( dyld::gLogAPIs )
 963                 fprintf(stderr, "%s(%p, \"%s\")\n", __func__, (void *)module, symbolName);
 964         ImageLoader* image = NSModuleToImageLoader(module);
 965         if ( image == NULL )
 966                 return NULL;
 967         return SymbolToNSSymbol(image->findExportedSymbol(symbolName, NULL, false, NULL));
 968 }
 969
 970 const char* NSNameOfModule(NSModule module)
 971 {
 972         if ( dyld::gLogAPIs )
 973                 fprintf(stderr, "%s(%p)\n", __func__, module);
 974         ImageLoader* image = NSModuleToImageLoader(module);
 975         if ( image == NULL )
 976                 return NULL;
 977         return image->getPath();
 978 }
 979
 980 const char* NSLibraryNameForModule(NSModule module)
 981 {
 982         if ( dyld::gLogAPIs )
 983                 fprintf(stderr, "%s(%p)\n", __func__, module);
 984         ImageLoader* image = NSModuleToImageLoader(module);
 985         if ( image == NULL )
 986                 return NULL;
 987         return image->getPath();
 988 }
 989
 990 bool NSUnLinkModule(NSModule module, uint32_t options)
 991 {
 992         if ( dyld::gLogAPIs )
 993                 fprintf(stderr, "%s(%p, 0x%08X)\n", __func__, module, options);
 994         if ( module == NULL )
 995                 return false;
 996         ImageLoader* image = NSModuleToImageLoader(module);
 997         if ( image == NULL )
 998                 return false;
 999         dyld::removeImage(image);
1000
1001         if ( (options & NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED) != 0 )
1002                 image->setLeaveMapped();
1003
1004         // TODO: NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES
1005
1006         // Only delete image if there is no ofi referencing it
1007         // That means the ofi was destroyed after linking, so no one is left to delete this image
1008         const int ofiCount = sObjectFileImages.size();
1009         bool found = false;
1010         for (int i=0; i < ofiCount; ++i) {
1011                 NSObjectFileImage ofi = sObjectFileImages[i];
1012                 if ( ofi->image == image )
1013                         found = true;
1014         }
1015         if ( !found )
1016                 delete image;
1017
1018         return true;
1019 }
1020
1021 // internal name and parameters do not match public name and parameters...
1022 static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit)
1023 {
1024         if ( dyld::gLogAPIs )
1025                 fprintf(stderr, "NSLinkEditErrorHandlers()\n");
1026
1027         dyld::registerUndefinedHandler((dyld::UndefinedHandler)undefined);
1028         // no support for multiple or linkedit handlers
1029 }
1030
1031 const struct mach_header * _dyld_get_image_header_containing_address(const void* address)
1032 {
1033         if ( dyld::gLogAPIs )
1034                 fprintf(stderr, "%s(%p)\n", __func__, address);
1035         ImageLoader* image = dyld::findImageContainingAddress(address);
1036         if ( image != NULL )
1037                 return image->machHeader();
1038         return NULL;
1039 }
1040
1041
1042 void _dyld_register_func_for_add_image(void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
1043 {
1044         if ( dyld::gLogAPIs )
1045                 fprintf(stderr, "%s(%p)\n", __func__, (void *)func);
1046         dyld::registerAddCallback(func);
1047 }
1048
1049 void _dyld_register_func_for_remove_image(void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
1050 {
1051         if ( dyld::gLogAPIs )
1052                 fprintf(stderr, "%s(%p)\n", __func__, (void *)func);
1053         dyld::registerRemoveCallback(func);
1054 }
1055
1056 // called by atexit() function installed by crt
1057 static void _dyld_mod_term_funcs()
1058 {
1059         if ( dyld::gLogAPIs )
1060                 fprintf(stderr, "%s()\n", __func__);
1061         dyld::runTerminators();
1062 }
1063
1064 // called by crt before main
1065 static void _dyld_make_delayed_module_initializer_calls()
1066 {
1067         if ( dyld::gLogAPIs )
1068                 fprintf(stderr, "%s()\n", __func__);
1069         dyld::initializeMainExecutable();
1070 }
1071
1072
1073 void NSLinkEditError(NSLinkEditErrors* c, int* errorNumber, const char** fileName, const char** errorString)
1074 {
1075         // FIXME FIXME
1076         *c = sLastErrorFileCode;
1077         *errorNumber = sLastErrorNo;
1078         *fileName = sLastErrorFilePath;
1079         *errorString = dyld::getErrorMessage();
1080 }
1081
1082 static void _dyld_register_binding_handler(void * (*bindingHandler)(const char *, const char *, void *), ImageLoader::BindingOptions bindingOptions)
1083 {
1084         if ( dyld::gLogAPIs )
1085                 fprintf(stderr, "%s()\n", __func__);
1086         dyld::gLinkContext.bindingHandler = bindingHandler;
1087         dyld::gLinkContext.bindingOptions = bindingOptions;
1088 }
1089
1090 // Call by fork() in libSystem before the kernel trap is done
1091 static void _dyld_fork_prepare()
1092 {
1093         if ( dyld::gLogAPIs )
1094                 fprintf(stderr, "%s()\n", __func__);
1095 }
1096
1097 // Call by fork() in libSystem after the kernel trap is done on the parent side
1098 static void _dyld_fork_parent()
1099 {
1100         if ( dyld::gLogAPIs )
1101                 fprintf(stderr, "%s()\n", __func__);
1102 }
1103
1104 // Call by fork() in libSystem after the kernel trap is done on the child side
1105 static void _dyld_fork_child()
1106 {
1107         if ( dyld::gLogAPIs )
1108                 fprintf(stderr, "%s()\n", __func__);
1109         // The implementation of fork() in libSystem knows to reset the variable mach_task_self_
1110         // in libSystem for the child of a fork.  But dyld is built with a static copy
1111         // of libc.a and has its own copy of mach_task_self_ which we reset here.
1112         //
1113         // In mach_init.h mach_task_self() is #defined to mach_task_self_ and
1114         // in mach_init() mach_task_self_ is initialized to task_self_trap().
1115         //
1116         extern mach_port_t      mach_task_self_;
1117         mach_task_self_ = task_self_trap();
1118 }
1119
1120 // Call by fork() in libSystem after the kernel trap is done on the child side after
1121 // other libSystem child side fixups are done
1122 static void _dyld_fork_child_final()
1123 {
1124         if ( dyld::gLogAPIs )
1125                 fprintf(stderr, "%s()\n", __func__);
1126 }
1127
1128
1129 typedef void (*MonitorProc)(char *lowpc, char *highpc);
1130
1131 static void monInitCallback(ImageLoader* image, void* userData)
1132 {
1133         MonitorProc proc = (MonitorProc)userData;
1134         void* start;
1135         size_t length;
1136         if ( image->getSectionContent("__TEXT", "__text", &start, &length) ) {
1137                 proc((char*)start, (char*)start+length);
1138         }
1139 }
1140
1141 //
1142 // _dyld_moninit is called from profiling runtime routine moninit().
1143 // dyld calls back with the range of each __TEXT/__text section in every
1144 // linked image.
1145 //
1146 void _dyld_moninit(MonitorProc proc)
1147 {
1148         dyld::forEachImageDo(&monInitCallback, (void*)proc);
1149 }
1150
1151 // returns true if prebinding was used in main executable
1152 bool _dyld_launched_prebound()
1153 {
1154         if ( dyld::gLogAPIs )
1155                 fprintf(stderr, "%s()\n", __func__);
1156
1157         // ¥¥¥Êif we deprecate prebinding, we may want to consider always returning true or false here
1158         return dyld::mainExecutablePrebound();
1159 }
1160
1161
1162 //
1163 // _dyld_NSMakePrivateModulePublic() is the dyld side of the hack
1164 // NSMakePrivateModulePublic() needed for the dlopen() to turn it's
1165 // RTLD_LOCAL handles into RTLD_GLOBAL.  It just simply turns off the private
1166 // flag on the image for this module.  If the module was found and it was
1167 // private then everything worked and TRUE is returned else FALSE is returned.
1168 //
1169 static bool NSMakePrivateModulePublic(NSModule module)
1170 {
1171         ImageLoader* image = NSModuleToImageLoader(module);
1172         if ( image != NULL ) {
1173                 if ( image->hasHiddenExports() ) {
1174                         image->setHideExports(false);
1175                         return true;
1176                 }
1177         }
1178         return false;
1179 }
1180
1181
1182
1183 bool lookupDyldFunction(const char* name, uintptr_t* address)
1184 {
1185         for (const dyld_func* p = dyld_funcs; p->name != NULL; ++p) {
1186             if ( strcmp(p->name, name) == 0 ) {
1187                         if( p->implementation == unimplemented )
1188                                 fprintf(stderr, "unimplemented dyld function: %s\n", p->name);
1189                         *address = (uintptr_t)p->implementation;
1190                         return true;
1191             }
1192         }
1193         *address = 0;
1194         return false;
1195 }
1196
1197
1198 static void registerThreadHelpers(const dyld::ThreadingHelpers* helpers)
1199 {
1200         // We need to make sure libSystem's lazy pointer's are bound
1201         // before installing thred helpers.
1202         // The reason for this is that if accessing the lock requires
1203         // a lazy pointer to be bound (and it does when multi-module
1204         // libSystem) is not prebound, the lazy handler will be
1205         // invoked which tries to acquire the lock again...an infinite
1206         // loop.
1207         ImageLoader* image = dyld::findImageContainingAddress(helpers);
1208         dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
1209
1210         dyld::gThreadHelpers = helpers;
1211 }
1212
1213
1214 static void dlerrorClear()
1215 {
1216         if ( dyld::gThreadHelpers != NULL ) {
1217                 char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(1);
1218                 buffer[0] = '\0';
1219         }
1220 }
1221
1222 static void dlerrorSet(const char* msg)
1223 {
1224         if ( dyld::gThreadHelpers != NULL ) {
1225                 char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(strlen(msg)+1);
1226                 strcpy(buffer, msg);
1227         }
1228 }
1229
1230
1231
1232 void* dlopen(const char* path, int mode)
1233 {
1234         if ( dyld::gLogAPIs )
1235                 fprintf(stderr, "%s(%s, 0x%08X)\n", __func__, path, mode);
1236
1237         dlerrorClear();
1238
1239         // passing NULL for path means return magic object
1240         if ( path == NULL ) {
1241                 return RTLD_DEFAULT;
1242         }
1243
1244         try {
1245                 void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
1246                 ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
1247
1248                 ImageLoader*    image = NULL;
1249                 dyld::LoadContext context;
1250                 context.useSearchPaths  = true;
1251                 context.useLdLibraryPath= (strchr(path, '/') == NULL);  // a leafname implies should search
1252                 context.matchByInstallName = true;
1253                 context.dontLoad = ( (mode & RTLD_NOLOAD) != 0 );
1254                 context.mustBeBundle    = false;
1255                 context.mustBeDylib             = false;
1256                 context.origin                  = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
1257                 context.rpath                   = NULL; // support not yet implemented
1258
1259                 image = load(path, context);
1260                 if ( image != NULL ) {
1261                         image->incrementReferenceCount();
1262                         if ( ! image->isLinked() ) {
1263                                 ImageLoader::BindingLaziness bindiness = ImageLoader::kNonLazyOnly;
1264                                 if ( (mode & RTLD_NOW) != 0 )
1265                                         bindiness = ImageLoader::kLazyAndNonLazy;
1266                                 dyld::link(image, bindiness, ImageLoader::kRunInitializers);
1267                                 // only hide exports if image is not already in use
1268                                 if ( (mode & RTLD_LOCAL) != 0 )
1269                                         image->setHideExports(true);
1270                         }
1271                         // RTLD_NODELETE means don't unmap image even after dlclosed. This is what dlcompat did on Mac OS X 10.3
1272                         // On other *nix OS's, it means dlclose() should do nothing, but the handle should be invalidated.
1273                         // The subtle differences are:
1274                         //  1) if the image has any termination routines, whether they are run during dlclose or when the process terminates
1275                         //  2) If someone does a supsequent dlopen() on the same image, whether the same address should be used.
1276                         if ( (mode & RTLD_NODELETE) != 0 )
1277                                 image->setLeaveMapped();
1278                         return image;
1279                 }
1280         }
1281         catch (const char* msg) {
1282                 const char* format = "dlopen(%s, %d): %s";
1283                 char temp[strlen(format)+strlen(path)+strlen(msg)+10];
1284                 sprintf(temp, format, path, mode, msg);
1285                 dlerrorSet(temp);
1286         }
1287         return NULL;
1288 }
1289
1290 int dlclose(void* handle)
1291 {
1292         if ( dyld::gLogAPIs )
1293                 fprintf(stderr, "%s(%p)\n", __func__, handle);
1294
1295         ImageLoader* image = (ImageLoader*)handle;
1296         if ( dyld::validImage(image) ) {
1297                 if ( image->decrementReferenceCount() ) {
1298                         // for now, only bundles can be unloaded
1299                         // to unload dylibs we would need to track all direct and indirect uses
1300                         if ( image->isBundle() ) {
1301                                 dyld::removeImage(image);
1302                                 delete image;
1303                         }
1304                 }
1305                 dlerrorClear();
1306                 return 0;
1307         }
1308         else {
1309                 dlerrorSet("invalid handle passed to dlclose()");
1310                 return -1;
1311         }
1312 }
1313
1314
1315
1316 int dladdr(const void* address, Dl_info* info)
1317 {
1318         if ( dyld::gLogAPIs )
1319                 fprintf(stderr, "%s(%p, %p)\n", __func__, address, info);
1320
1321         ImageLoader* image = dyld::findImageContainingAddress(address);
1322         if ( image != NULL ) {
1323                 info->dli_fname = image->getLogicalPath();
1324                 info->dli_fbase = (void*)image->machHeader();
1325                 // find closest exported symbol in the image
1326                 const uint32_t exportCount = image->getExportedSymbolCount();
1327                 const ImageLoader::Symbol* bestSym = NULL;
1328                 const void* bestAddr = 0;
1329                 for(uint32_t i=0; i < exportCount; ++i) {
1330                         const ImageLoader::Symbol* sym = image->getIndexedExportedSymbol(i);
1331                         const void* symAddr = (void*)image->getExportedSymbolAddress(sym);
1332                         if ( (symAddr <= address) && (bestAddr < symAddr) ) {
1333                                 bestSym = sym;
1334                                 bestAddr = symAddr;
1335                         }
1336                 }
1337                 if ( bestSym != NULL ) {
1338                         info->dli_sname = image->getExportedSymbolName(bestSym) + 1; // strip off leading underscore
1339                         info->dli_saddr = (void*)bestAddr;
1340                 }
1341                 else {
1342                         info->dli_sname = NULL;
1343                         info->dli_saddr = NULL;
1344                 }
1345                 return 1; // success
1346         }
1347         return 0;  // failure
1348 }
1349
1350
1351 char* dlerror()
1352 {
1353         if ( dyld::gLogAPIs )
1354                 fprintf(stderr, "%s()\n", __func__);
1355
1356         if ( dyld::gThreadHelpers != NULL ) {
1357                 char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(1);
1358                 // if no error set, return NULL
1359                 if ( buffer[0] != '\0' )
1360                         return buffer;
1361         }
1362         return NULL;
1363 }
1364
1365 void* dlsym(void* handle, const char* symbolName)
1366 {
1367         if ( dyld::gLogAPIs )
1368                 fprintf(stderr, "%s(%p, %s)\n", __func__, handle, symbolName);
1369
1370         dlerrorClear();
1371
1372         ImageLoader* image;
1373         const ImageLoader::Symbol* sym;
1374
1375         // dlsym() assumes symbolName passed in is same as in C source code
1376         // dyld assumes all symbol names have an underscore prefix
1377         char underscoredName[strlen(symbolName)+2];
1378         underscoredName[0] = '_';
1379         strcpy(&underscoredName[1], symbolName);
1380
1381         // magic "search all" handle
1382         if ( handle == RTLD_DEFAULT ) {
1383                 if ( dyld::flatFindExportedSymbol(underscoredName, &sym, &image) ) {
1384                         return (void*)image->getExportedSymbolAddress(sym);
1385                 }
1386                 const char* format = "dlsym(RTLD_DEFAULT, %s): symbol not found";
1387                 char temp[strlen(format)+strlen(symbolName)+2];
1388                 sprintf(temp, format, symbolName);
1389                 dlerrorSet(temp);
1390                 return NULL;
1391         }
1392
1393         // magic "search what I would see" handle
1394         if ( handle == RTLD_NEXT ) {
1395                 void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
1396                 ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
1397                 sym = callerImage->resolveSymbol(underscoredName, false, &image);
1398                 if ( sym != NULL ) {
1399                         return (void*)image->getExportedSymbolAddress(sym);
1400                 }
1401                 const char* format = "dlsym(RTLD_NEXT, %s): symbol not found";
1402                 char temp[strlen(format)+strlen(symbolName)+2];
1403                 sprintf(temp, format, symbolName);
1404                 dlerrorSet(temp);
1405                 return NULL;
1406         }
1407 #ifdef RTLD_SELF
1408         // magic "search me, then what I would see" handle
1409         if ( handle == RTLD_SELF ) {
1410                 void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
1411                 ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
1412                 sym = callerImage->findExportedSymbol(underscoredName, NULL, false, &image);  // search first in calling image
1413                 if ( sym != NULL ) {
1414                         return (void*)image->getExportedSymbolAddress(sym);
1415                 }
1416                 sym = callerImage->resolveSymbol(underscoredName, false, &image);                       // search what calling image links against
1417                 if ( sym != NULL ) {
1418                         return (void*)image->getExportedSymbolAddress(sym);
1419                 }
1420                 const char* format = "dlsym(RTLD_SELF, %s): symbol not found";
1421                 char temp[strlen(format)+strlen(symbolName)+2];
1422                 sprintf(temp, format, symbolName);
1423                 dlerrorSet(temp);
1424                 return NULL;
1425         }
1426 #endif
1427         // real handle
1428         image = (ImageLoader*)handle;
1429         if ( dyld::validImage(image) ) {
1430                 ImageLoader* foundIn;
1431                 sym = image->findExportedSymbol(underscoredName, NULL, true, &foundIn);
1432                 if ( sym != NULL ) {
1433                         return (void*)(foundIn->getExportedSymbolAddress(sym));
1434                 }
1435                 sym = image->resolveSymbol(underscoredName, false, &image);// search what image links against
1436                 if ( sym != NULL ) {
1437                         return (void*)image->getExportedSymbolAddress(sym);
1438                 }
1439                 const char* format = "dlsym(%p, %s): symbol not found";
1440                 char temp[strlen(format)+strlen(symbolName)+20];
1441                 sprintf(temp, format, handle, symbolName);
1442                 dlerrorSet(temp);
1443         }
1444         else {
1445                 dlerrorSet("invalid handle passed to dlsym()");
1446         }
1447         return NULL;
1448 }
1449
1450
1451 #define UPDATE_PREBINDING_DRY_RUN  0x00000001
1452 #define UPDATE_PREBINDING_PROGRESS 0x00000002
1453
1454 //
1455 // SPI called only by update_prebinding tool to redo prebinding in all prebound files specified
1456 // There must be no dylibs loaded when this fnction is called.
1457 //
1458 __attribute__((noreturn))
1459 static void _dyld_update_prebinding(int pathCount, const char* paths[], uint32_t flags)
1460 {
1461         if ( dyld::gLogAPIs )
1462                 fprintf(stderr, "%s()\n", __func__);
1463
1464         // list of requested dylibs actually loaded
1465         std::vector<ImageLoader*> preboundImages;
1466
1467         try {
1468                 // verify no dylibs loaded
1469                 if ( dyld::getImageCount() != 1 )
1470                         throw "_dyld_update_prebinding cannot be called with dylib already loaded";
1471
1472                 const uint32_t max_allowed_link_errors = 10;
1473                 uint32_t link_error_count = 0;
1474
1475                 // load and link each dylib
1476                 for (int i=0; i < pathCount; ++i) {
1477                         dyld::LoadContext context;
1478                         context.useSearchPaths          = false;
1479                         context.matchByInstallName      = true;
1480                         context.dontLoad                        = false;
1481                         context.mustBeBundle            = false;
1482                         context.mustBeDylib                     = true;
1483                         context.origin                          = NULL;         // @loader_path not allowed in prebinding list
1484                         context.rpath                           = NULL;         // support not yet implemented
1485
1486                         ImageLoader* image = NULL;
1487                         try {
1488                                 image = dyld::load(paths[i], context);
1489                                 // bind lazy and non-lazy symbols, but don't run initializers
1490                                 // this may bring in other dylibs later in the list or missing from list, but that is ok
1491                                 dyld::link(image, ImageLoader::kLazyAndNonLazy, ImageLoader::kDontRunInitializers);
1492                                 // recored images we successfully loaded
1493                                 preboundImages.push_back(image);
1494                         }
1495                         catch (const char* msg) {
1496                                 if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) ) {
1497                                         const char *stage;
1498                                         if ( image == NULL ) // load exception
1499                                                 stage = "load";
1500                                         else // link exception
1501                                                 stage = "link";
1502                                         fprintf(stderr, "update_prebinding: warning: could not %s %s: %s\n", stage, paths[i], msg);
1503                                 }
1504                                 if ( image != NULL )
1505                                         link_error_count++;
1506                                 if ( link_error_count > max_allowed_link_errors )
1507                                         throw;
1508                         }
1509                 }
1510
1511                 // find missing images
1512                 uint32_t loadedImageCount =     dyld::getImageCount();
1513                 if ( loadedImageCount > (preboundImages.size()+1) ) {
1514                         if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
1515                                 fprintf(stderr, "update_prebinding: warning: the following dylibs were loaded but will not have their prebinding updated because they are not in the list of paths to reprebind\n");
1516                         for (uint32_t i=1; i < loadedImageCount; ++i) {
1517                                 ImageLoader* target = dyld::getIndexedImage(i);
1518                                 bool found = false;
1519                                 for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
1520                                         if ( *it == target ) {
1521                                                 found = true;
1522                                                 break;
1523                                         }
1524                                 }
1525                                 if ( !found )
1526                                         if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
1527                                                 fprintf(stderr, "  %s\n", target->getPath());
1528                         }
1529                 }
1530
1531                 // warn about unprebound files in the list
1532                 bool unpreboundWarned = false;
1533                 for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
1534                         if ( ! (*it)->isPrebindable() && (*it != dyld::mainExecutable()) ) {
1535                                 if ( ! unpreboundWarned ) {
1536                                         if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
1537                                                 fprintf(stderr, "update_prebinding: warning: the following dylibs were specified but were not built prebound\n");
1538                                         unpreboundWarned = true;
1539                                 }
1540                                 if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
1541                                         fprintf(stderr, "  %s\n", (*it)->getPath());
1542                         }
1543                 }
1544
1545                 if(UPDATE_PREBINDING_DRY_RUN & flags) {
1546                         fprintf(stderr, "update_prebinding: dry-run: no changes were made to the filesystem.\n");
1547                 }
1548                 else {
1549                         uint32_t imageCount = preboundImages.size();
1550                         uint32_t imageNumber = 1;
1551                         // tell each image to write itself out re-prebound
1552                         struct timeval currentTime = { 0 , 0 };
1553                         gettimeofday(&currentTime, NULL);
1554                         time_t timestamp = currentTime.tv_sec;
1555                         for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
1556                                 (*it)->reprebind(dyld::gLinkContext, timestamp);
1557                                 if(UPDATE_PREBINDING_PROGRESS & flags) {
1558                                         fprintf(stdout, "update_prebinding: progress: %3u/%u\n", imageNumber, imageCount);
1559                                         fflush(stdout);
1560                                         imageNumber++;
1561                                 }
1562                         }
1563
1564                         // tell file system to flush all dirty buffers to disk
1565                         // after this sync, all the _redoprebinding files will be on disk
1566                         sync();
1567
1568                         // now commit (swap file) for each re-prebound image
1569                         // this only updates directories, since the files have already been flushed by previous sync()
1570                         for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
1571                                 (*it)->reprebindCommit(dyld::gLinkContext, true);
1572                         }
1573
1574                         // tell file system to flush all dirty buffers to disk
1575                         // this should flush out all directory changes caused by the file swapping
1576                         sync();
1577                 }
1578         }
1579         catch (const char* msg) {
1580                 // delete temp files
1581                 try {
1582                         for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
1583                                 (*it)->reprebindCommit(dyld::gLinkContext, false);
1584                         }
1585                 }
1586                 catch (const char* commitMsg) {
1587                         fprintf(stderr, "update_prebinding: error: %s\n", commitMsg);
1588                 }
1589                 fprintf(stderr, "update_prebinding: error: %s\n", msg);
1590                 exit(1);
1591         }
1592         exit(0);
1593 }
1594
1595
1596
1597 static const struct dyld_all_image_infos* _dyld_get_all_image_infos()
1598 {
1599         return &dyld_all_image_infos;
1600 }
1601
1602
1603
1604
1605
1606
1607
1608