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--- dyld/dyld-852/src/dyldAPIs.cpp
+++ /dev/null
@@ -1,2273 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2004-2009 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-//
-// This file implements that API's in <mach-o/dyld.h>
-//
-//
-
-#define __STDC_LIMIT_MACROS
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-#include <sys/param.h>
-#include <sys/mount.h>
-#include <Availability.h>
-
-
-#include <vector>
-#include <map>
-#include <algorithm>
-
-#include <mach/mach.h>
-#include <sys/time.h>
-#include <sys/sysctl.h>
-#include <mach/mach_traps.h> // for task_self_trap()
-
-#include <mach-o/dyld_images.h>
-#include <mach-o/dyld.h>
-#include <mach-o/dyld_priv.h>
-
-#include "ImageLoader.h"
-#include "ImageLoaderMachO.h"
-#include "dyld2.h"
-#include "dyldLibSystemInterface.h"
-#include "DyldSharedCache.h"
-#include "MachOFile.h"
-
-#undef _POSIX_C_SOURCE
-#include <dlfcn.h>
-
-#if __has_feature(ptrauth_calls)
- #include <ptrauth.h>
-#endif
-
-
-// relocation_info.r_length field has value 3 for 64-bit executables and value 2 for 32-bit executables
-#if __LP64__
-#define RELOC_SIZE 3
-#define LC_SEGMENT_COMMAND LC_SEGMENT_64
-#define LC_ROUTINES_COMMAND LC_ROUTINES_64
-struct macho_segment_command : public segment_command_64 {};
-struct macho_section : public section_64 {};
-struct macho_routines_command : public routines_command_64 {};
-#else
-#define RELOC_SIZE 2
-#define LC_SEGMENT_COMMAND LC_SEGMENT
-#define LC_ROUTINES_COMMAND LC_ROUTINES
-struct macho_segment_command : public segment_command {};
-struct macho_section : public section {};
-struct macho_routines_command : public routines_command {};
-#endif
-
-
-// this was in dyld_priv.h but it is no longer exported
-extern "C" {
- const struct dyld_all_image_infos* _dyld_get_all_image_infos();
-}
-
-// from dyldExceptions.c
-extern "C" void __Unwind_SjLj_SetThreadKey(pthread_key_t key);
-
-// from dyld_gdb.cpp
-extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
-extern uint32_t allImagesCount();
-extern const mach_header* allImagesIndexedMachHeader(uint32_t index);
-extern const char* allImagesIndexedPath(uint32_t index);
-
-extern "C" int _dyld_func_lookup(const char* name, void** address);
-
-extern "C" void* dlopen_internal(const char* path, int mode, void* callerAddress);
-extern "C" bool dlopen_preflight_internal(const char* path, void* callerAddress);
-extern "C" void* dlsym_internal(void* handle, const char* symbolName, void* callerAddress);
-
-extern "C" void* dlopen_compat(const char* path, int mode);
-extern "C" bool dlopen_preflight_compat(const char* path);
-extern "C" void* dlsym_compat(void* handle, const char* symbolName);
-
-
-
-// deprecated APIs are still availble on Mac OS X, but not on iPhone OS
-#if TARGET_OS_OSX
- #define DEPRECATED_APIS_SUPPORTED 1
-#else
- #define DEPRECATED_APIS_SUPPORTED 0
-#endif
-
-static bool sDynamicInterposing = false;
-
-#if DEPRECATED_APIS_SUPPORTED
-static char sLastErrorFilePath[1024];
-static NSLinkEditErrors sLastErrorFileCode;
-static int sLastErrorNo;
-#endif
-
-// In 10.3.x and earlier all the NSObjectFileImage API's were implemeneted in libSystem.dylib
-// Beginning in 10.4 the NSObjectFileImage API's are implemented in dyld and libSystem just forwards
-// This conditional keeps support for old libSystem's which needed some help implementing the API's
-#define OLD_LIBSYSTEM_SUPPORT (__i386__)
-
-// The following functions have no prototype in any header. They are special cases
-// where _dyld_func_lookup() is used directly.
-static void _dyld_make_delayed_module_initializer_calls();
-static void registerThreadHelpers(const dyld::LibSystemHelpers*);
-#if DEPRECATED_APIS_SUPPORTED
-static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit);
-#if OLD_LIBSYSTEM_SUPPORT
-static NSModule _dyld_link_module(NSObjectFileImage object_addr, size_t object_size, const char* moduleName, uint32_t options);
-#endif
-static void _dyld_register_binding_handler(void * (*)(const char *, const char *, void *), ImageLoader::BindingOptions);
-static bool NSMakePrivateModulePublic(NSModule module);
-static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header);
-
-// The following functions are dyld API's, but since dyld links with a static copy of libc.a
-// the public name cannot be used.
-static void client_dyld_lookup_and_bind(const char* symbolName, void** address, NSModule* module);
-static bool client_NSIsSymbolNameDefined(const char* symbolName);
-#endif // DEPRECATED_APIS_SUPPORTED
-#if SUPPORT_ZERO_COST_EXCEPTIONS
-static bool client_dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info);
-#endif
-#if DEPRECATED_APIS_SUPPORTED
-#endif
-
-static void unimplemented()
-{
- dyld::halt("unimplemented dyld function\n");
-}
-
-struct dyld_func {
- const char* name;
- void* implementation;
-};
-
-static const struct dyld_func dyld_funcs[] = {
- {"__dyld_register_func_for_add_image", (void*)_dyld_register_func_for_add_image },
- {"__dyld_register_func_for_remove_image", (void*)_dyld_register_func_for_remove_image },
- {"__dyld_dladdr", (void*)dladdr },
- {"__dyld_dlclose", (void*)dlclose },
- {"__dyld_dlerror", (void*)dlerror },
- {"__dyld_dlopen_internal", (void*)dlopen_internal },
- {"__dyld_dlsym_internal", (void*)dlsym_internal },
- {"__dyld_dlopen_preflight_internal", (void*)dlopen_preflight_internal },
- {"__dyld_dlopen", (void*)dlopen_compat },
- {"__dyld_dlsym", (void*)dlsym_compat },
- {"__dyld_dlopen_preflight", (void*)dlopen_preflight_compat },
- {"__dyld_image_count", (void*)_dyld_image_count },
- {"__dyld_get_image_header", (void*)_dyld_get_image_header },
- {"__dyld_get_image_vmaddr_slide", (void*)_dyld_get_image_vmaddr_slide },
- {"__dyld_get_image_name", (void*)_dyld_get_image_name },
- {"__dyld_get_image_slide", (void*)_dyld_get_image_slide },
- {"__dyld_get_prog_image_header", (void*)_dyld_get_prog_image_header },
- {"__dyld__NSGetExecutablePath", (void*)_NSGetExecutablePath },
-
- // SPIs
- {"__dyld_register_thread_helpers", (void*)registerThreadHelpers },
- {"__dyld_fork_child", (void*)_dyld_fork_child },
- {"__dyld_make_delayed_module_initializer_calls", (void*)_dyld_make_delayed_module_initializer_calls },
- {"__dyld_get_all_image_infos", (void*)_dyld_get_all_image_infos },
-#if SUPPORT_ZERO_COST_EXCEPTIONS
- {"__dyld_find_unwind_sections", (void*)client_dyld_find_unwind_sections },
-#endif
-#if __i386__ || __x86_64__ || __arm__ || __arm64__
- {"__dyld_fast_stub_entry", (void*)dyld::fastBindLazySymbol },
-#endif
- {"__dyld_image_path_containing_address", (void*)dyld_image_path_containing_address },
- {"__dyld_shared_cache_some_image_overridden", (void*)dyld_shared_cache_some_image_overridden },
- {"__dyld_process_is_restricted", (void*)dyld::processIsRestricted },
- {"__dyld_dynamic_interpose", (void*)dyld_dynamic_interpose },
- {"__dyld_shared_cache_file_path", (void*)dyld::getStandardSharedCacheFilePath },
- {"__dyld_has_inserted_or_interposing_libraries", (void*)dyld::hasInsertedOrInterposingLibraries },
- {"__dyld_get_image_header_containing_address", (void*)dyld_image_header_containing_address },
- {"__dyld_is_memory_immutable", (void*)_dyld_is_memory_immutable },
- {"__dyld_objc_notify_register", (void*)_dyld_objc_notify_register },
- {"__dyld_get_shared_cache_uuid", (void*)_dyld_get_shared_cache_uuid },
- {"__dyld_get_shared_cache_range", (void*)_dyld_get_shared_cache_range },
- {"__dyld_images_for_addresses", (void*)_dyld_images_for_addresses },
- {"__dyld_register_for_image_loads", (void*)_dyld_register_for_image_loads },
- {"__dyld_register_for_bulk_image_loads", (void*)_dyld_register_for_bulk_image_loads },
- {"__dyld_register_driverkit_main", (void*)_dyld_register_driverkit_main },
- {"__dyld_halt", (void*)dyld::halt },
-
-#if DEPRECATED_APIS_SUPPORTED
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wdeprecated-declarations"
- {"__dyld_lookup_and_bind", (void*)client_dyld_lookup_and_bind },
- {"__dyld_lookup_and_bind_with_hint", (void*)_dyld_lookup_and_bind_with_hint },
- {"__dyld_lookup_and_bind_fully", (void*)_dyld_lookup_and_bind_fully },
- {"__dyld_install_handlers", (void*)_dyld_install_handlers },
- {"__dyld_link_edit_error", (void*)NSLinkEditError },
- {"__dyld_unlink_module", (void*)NSUnLinkModule },
- {"__dyld_bind_fully_image_containing_address", (void*)_dyld_bind_fully_image_containing_address },
- {"__dyld_image_containing_address", (void*)_dyld_image_containing_address },
- {"__dyld_register_binding_handler", (void*)_dyld_register_binding_handler },
- {"__dyld_NSNameOfSymbol", (void*)NSNameOfSymbol },
- {"__dyld_NSAddressOfSymbol", (void*)NSAddressOfSymbol },
- {"__dyld_NSModuleForSymbol", (void*)NSModuleForSymbol },
- {"__dyld_NSLookupAndBindSymbol", (void*)NSLookupAndBindSymbol },
- {"__dyld_NSLookupAndBindSymbolWithHint", (void*)NSLookupAndBindSymbolWithHint },
- {"__dyld_NSLookupSymbolInModule", (void*)NSLookupSymbolInModule},
- {"__dyld_NSLookupSymbolInImage", (void*)NSLookupSymbolInImage},
- {"__dyld_NSMakePrivateModulePublic", (void*)NSMakePrivateModulePublic},
- {"__dyld_NSIsSymbolNameDefined", (void*)client_NSIsSymbolNameDefined},
- {"__dyld_NSIsSymbolNameDefinedWithHint", (void*)NSIsSymbolNameDefinedWithHint },
- {"__dyld_NSIsSymbolNameDefinedInImage", (void*)NSIsSymbolNameDefinedInImage},
- {"__dyld_NSNameOfModule", (void*)NSNameOfModule },
- {"__dyld_NSLibraryNameForModule", (void*)NSLibraryNameForModule },
- {"__dyld_NSAddLibrary", (void*)NSAddLibrary },
- {"__dyld_NSAddLibraryWithSearching", (void*)NSAddLibraryWithSearching },
- {"__dyld_NSAddImage", (void*)NSAddImage },
- {"__dyld_launched_prebound", (void*)_dyld_launched_prebound },
- {"__dyld_all_twolevel_modules_prebound", (void*)_dyld_all_twolevel_modules_prebound },
- {"__dyld_call_module_initializers_for_dylib", (void*)_dyld_call_module_initializers_for_dylib },
- {"__dyld_NSCreateObjectFileImageFromFile", (void*)NSCreateObjectFileImageFromFile },
- {"__dyld_NSCreateObjectFileImageFromMemory", (void*)NSCreateObjectFileImageFromMemory },
- {"__dyld_NSDestroyObjectFileImage", (void*)NSDestroyObjectFileImage },
- {"__dyld_NSLinkModule", (void*)NSLinkModule },
- {"__dyld_NSSymbolDefinitionCountInObjectFileImage", (void*)NSSymbolDefinitionCountInObjectFileImage },
- {"__dyld_NSSymbolDefinitionNameInObjectFileImage", (void*)NSSymbolDefinitionNameInObjectFileImage },
- {"__dyld_NSIsSymbolDefinedInObjectFileImage", (void*)NSIsSymbolDefinedInObjectFileImage },
- {"__dyld_NSSymbolReferenceNameInObjectFileImage", (void*)NSSymbolReferenceNameInObjectFileImage },
- {"__dyld_NSSymbolReferenceCountInObjectFileImage", (void*)NSSymbolReferenceCountInObjectFileImage },
- {"__dyld_NSGetSectionDataInObjectFileImage", (void*)NSGetSectionDataInObjectFileImage },
-#if OLD_LIBSYSTEM_SUPPORT
- {"__dyld_link_module", (void*)_dyld_link_module },
-#endif
-#pragma clang diagnostic pop
-#endif //DEPRECATED_APIS_SUPPORTED
-
- {NULL, 0}
-};
-
-
-
-#if DEPRECATED_APIS_SUPPORTED
-
-static void dyldAPIhalt(const char* apiName, const char* errorMsg)
-{
- dyld::log("dyld: %s() error\n", apiName);
- dyld::halt(errorMsg);
-}
-
-// dyld's abstract type NSSymbol is implemented as const ImageLoader::Symbol*
-inline NSSymbol SymbolToNSSymbol(const ImageLoader::Symbol* sym)
-{
- return (NSSymbol)sym;
-}
-inline const ImageLoader::Symbol* NSSymbolToSymbol(NSSymbol sym)
-{
- return (const ImageLoader::Symbol*)sym;
-}
-
-// dyld's abstract type NSModule is implemented as ImageLoader*
-inline NSModule ImageLoaderToNSModule(const ImageLoader* image)
-{
- return (NSModule)image;
-}
-inline ImageLoader* NSModuleToImageLoader(NSModule module)
-{
- ImageLoader* image = (ImageLoader*)module;
- if ( dyld::validImage(image) )
- return image;
- return NULL;
-}
-
-// actual definition for opaque type
-struct __NSObjectFileImage
-{
- ImageLoader* image;
- const void* imageBaseAddress; // not used with OFI created from files
- size_t imageLength; // not used with OFI created from files
-};
-typedef __NSObjectFileImage* NSObjectFileImage;
-
-
-VECTOR_NEVER_DESTRUCTED(NSObjectFileImage);
-static std::vector<NSObjectFileImage> sObjectFileImages;
-
-
-
-//
-// __NSObjectFileImage are deleted in NSDestroyObjectFileImage()
-// The contained image is delete in one of two places:
-// NSUnLinkModule deletes the image if there is no __NSObjectFileImage with a reference to it
-// NSDestroyObjectFileImage deletes the image if image is not in list of valid images
-//
-
-
-
-static void setLastError(NSLinkEditErrors code, int errnum, const char* file, const char* message)
-{
- dyld::setErrorMessage(message);
- strncpy(sLastErrorFilePath, file, 1024);
- sLastErrorFilePath[1023] = '\0';
- sLastErrorFileCode = code;
- sLastErrorNo = errnum;
-}
-
-#endif // DEPRECATED_APIS_SUPPORTED
-
-/*
- *_dyld_NSGetExecutablePath is the dyld side of _NSGetExecutablePath which
- * copies the path of the executable into the buffer and returns 0 if the path
- * was successfully copied in the provided buffer. If the buffer is not large
- * enough, -1 is returned and the expected buffer size is copied in *bufsize.
- * Note that _NSGetExecutablePath will return "a path" to the executable not a
- * "real path" to the executable. That is the path may be a symbolic link and
- * not the real file. And with deep directories the total bufsize needed could
- * be more than MAXPATHLEN.
- */
-int _NSGetExecutablePath(char* buf, uint32_t *bufsize)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(...)\n", __func__);
- const char* exePath = dyld::getExecutablePath();
- if(*bufsize < strlen(exePath) + 1){
- *bufsize = (uint32_t)(strlen(exePath) + 1);
- return -1;
- }
- strcpy(buf, exePath);
- return 0;
-}
-
-uint32_t _dyld_image_count(void)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
- return allImagesCount();
-}
-
-const struct mach_header* _dyld_get_image_header(uint32_t image_index)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%u)\n", __func__, image_index);
- return allImagesIndexedMachHeader(image_index);
-}
-
-intptr_t _dyld_get_image_vmaddr_slide(uint32_t image_index)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%u)\n", __func__, image_index);
- const struct mach_header* mh = allImagesIndexedMachHeader(image_index);
- if ( mh != NULL )
- return ImageLoaderMachO::computeSlide(mh);
- else
- return 0;
-}
-
-intptr_t _dyld_get_image_slide(const struct mach_header* mh)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, mh);
- return ImageLoaderMachO::computeSlide(mh);
-}
-
-
-const char* _dyld_get_image_name(uint32_t image_index)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%u)\n", __func__, image_index);
- return allImagesIndexedPath(image_index);
-}
-
-const struct mach_header* _dyld_get_prog_image_header()
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
-
- return dyld::mainExecutable()->machHeader();
-}
-
-static const void *stripPointer(const void *ptr) {
-#if __has_feature(ptrauth_calls)
- return __builtin_ptrauth_strip(ptr, ptrauth_key_asia);
-#else
- return ptr;
-#endif
-}
-
-static void *stripPointer(void *ptr) {
-#if __has_feature(ptrauth_calls)
- return __builtin_ptrauth_strip(ptr, ptrauth_key_asia);
-#else
- return ptr;
-#endif
-}
-
-const struct mach_header * dyld_image_header_containing_address(const void* address)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
- address = stripPointer(address);
-#if SUPPORT_ACCELERATE_TABLES
- const mach_header* mh;
- const char* path;
- if ( dyld::addressInCache(address, &mh, &path) )
- return mh;
-#endif
- ImageLoader* image = dyld::findImageContainingAddress(address);
- if ( image != NULL )
- return image->machHeader();
- return NULL;
-}
-
-
-void _dyld_register_func_for_add_image(void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)func);
- dyld::registerAddCallback(func);
-}
-
-void _dyld_register_func_for_remove_image(void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)func);
- dyld::registerRemoveCallback(func);
-}
-
-
-
-// called by crt before main() by programs linked with 10.4 or earlier crt1.o
-static void _dyld_make_delayed_module_initializer_calls()
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
-
-#if SUPPORT_OLD_CRT_INITIALIZATION
- if ( dyld::gRunInitializersOldWay )
- dyld::initializeMainExecutable();
-#endif
-}
-
-
-
-#if DEPRECATED_APIS_SUPPORTED
-
-//
-// _dyld_call_module_initializers_for_dylib() is the dyld side of
-// __initialize_Cplusplus() which is in dylib1.o.
-// It is intended to only be called inside -init rouintes.
-// -init routines are called before module initializers (what C++
-// initializers use). Calling __initialize_Cplusplus() in a -init
-// routine causes the module initializers for an image to be called
-// which then allows C++ to be used inside a -init routine
-//
-static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header)
-{
- if ( dyld::gLogAPIs )
- dyld::log("__initialize_Cplusplus()\n");
-
- // for now, do nothing...
-}
-
-
-void _dyld_lookup_and_bind_fully(const char* symbolName, void** address, NSModule* module)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", %p, %p)\n", __func__, symbolName, address, module);
- ImageLoader* image;
- const ImageLoader::Symbol* sym;
- dyld::clearErrorMessage();
- if ( dyld::flatFindExportedSymbol(symbolName, &sym, (const ImageLoader**)&image) ) {
- try {
- image->bindAllLazyPointers(dyld::gLinkContext, true);
- if ( address != NULL)
- *address = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
- if ( module != NULL)
- *module = ImageLoaderToNSModule(image);
- }
- catch (const char* msg) {
- dyldAPIhalt(__func__, msg);
- }
- }
- else {
- // on failure to find symbol return NULLs
- if ( address != NULL)
- *address = NULL;
- if ( module != NULL)
- *module = NULL;
- }
-}
-
-// Note: This cannot have public name because dyld is built with a static copy of libc.a
-// which calls dyld_lookup_and_bind() and expects to find dyld's symbols not host process
-static void client_dyld_lookup_and_bind(const char* symbolName, void** address, NSModule* module)
-{
- if ( dyld::gLogAPIs )
- dyld::log("_dyld_lookup_and_bind(\"%s\", %p, %p)\n", symbolName, address, module);
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
- if ( address != NULL)
- *address = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
- if ( module != NULL)
- *module = ImageLoaderToNSModule(image);
- }
- else {
- // on failure to find symbol return NULLs
- if ( address != NULL)
- *address = NULL;
- if ( module != NULL)
- *module = NULL;
- }
-}
-
-void _dyld_lookup_and_bind_with_hint(const char* symbolName, const char* library_name_hint, void** address, NSModule* module)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\", %p, %p)\n", __func__, symbolName, library_name_hint, address, module);
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- // Look for library whose path contains the hint. If that fails search everywhere
- if ( dyld::flatFindExportedSymbolWithHint(symbolName, library_name_hint, &sym, &image)
- || dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
- if ( address != NULL)
- *address = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
- if ( module != NULL)
- *module = ImageLoaderToNSModule(image);
- }
- else {
- // on failure to find symbol return NULLs
- if ( address != NULL)
- *address = NULL;
- if ( module != NULL)
- *module = NULL;
- }
-}
-
-
-NSSymbol NSLookupAndBindSymbol(const char *symbolName)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\")\n", __func__, symbolName);
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
- return SymbolToNSSymbol(sym);
- }
- // return NULL on failure
- return NULL;
-}
-
-NSSymbol NSLookupAndBindSymbolWithHint(const char* symbolName, const char* libraryNameHint)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- bool found = dyld::flatFindExportedSymbolWithHint(symbolName, libraryNameHint, &sym, &image);
- if ( ! found ) {
- // hint failed, do slow search of all images
- found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
- }
- if ( found )
- return SymbolToNSSymbol(sym);
-
- // return NULL on failure and log
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\") => NULL \n", __func__, symbolName, libraryNameHint);
- return NULL;
-}
-
-
-
-
-static __attribute__((noinline))
-const struct mach_header* addImage(void* callerAddress, const char* path, bool search, bool dontLoad, bool matchInstallName, bool abortOnError)
-{
- ImageLoader* image = NULL;
- std::vector<const char*> rpathsFromCallerImage;
- try {
- dyld::clearErrorMessage();
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- // like dlopen, use rpath from caller image and from main executable
- if ( callerImage != NULL )
- callerImage->getRPaths(dyld::gLinkContext, rpathsFromCallerImage);
- ImageLoader::RPathChain callersRPaths(NULL, &rpathsFromCallerImage);
- if ( callerImage != dyld::mainExecutable() ) {
- dyld::mainExecutable()->getRPaths(dyld::gLinkContext, rpathsFromCallerImage);
- }
- dyld::LoadContext context;
- context.useSearchPaths = search;
- context.useFallbackPaths = search;
- context.useLdLibraryPath = false;
- context.implicitRPath = false;
- context.matchByInstallName = matchInstallName;
- context.dontLoad = dontLoad;
- context.mustBeBundle = false;
- context.mustBeDylib = true;
- context.canBePIE = false;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = &callersRPaths; // rpaths from caller and main executable
-
- unsigned cacheIndex;
- image = load(path, context, cacheIndex);
- if ( image != NULL ) {
- if ( context.matchByInstallName )
- image->setMatchInstallPath(true);
- dyld::link(image, false, false, callersRPaths, cacheIndex);
- dyld::runInitializers(image);
- // images added with NSAddImage() can never be unloaded
- image->setNeverUnload();
- }
- }
- catch (const char* msg) {
- dyld::garbageCollectImages();
- if ( abortOnError) {
- char pathMsg[strlen(msg)+strlen(path)+4];
- strcpy(pathMsg, msg);
- strcat(pathMsg, " ");
- strcat(pathMsg, path);
- dyldAPIhalt("NSAddImage", pathMsg);
- }
- // not halting, so set error state for NSLinkEditError to find
- setLastError(NSLinkEditOtherError, 0, path, msg);
- free((void*)msg); // our free() will do nothing if msg is a string literal
- image = NULL;
- }
- // free rpaths (getRPaths() malloc'ed each string)
- for(std::vector<const char*>::iterator it=rpathsFromCallerImage.begin(); it != rpathsFromCallerImage.end(); ++it) {
- const char* str = *it;
- free((void*)str);
- }
- if ( image == NULL )
- return NULL;
- else
- return image->machHeader();
-}
-
-
-const struct mach_header* NSAddImage(const char* path, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", 0x%08X)\n", __func__, path, options);
- const bool dontLoad = ( (options & NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED) != 0 );
- const bool search = ( (options & NSADDIMAGE_OPTION_WITH_SEARCHING) != 0 );
- const bool matchInstallName = ( (options & NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME) != 0 );
- const bool abortOnError = ( (options & (NSADDIMAGE_OPTION_RETURN_ON_ERROR|NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED)) == 0 );
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- return addImage(callerAddress, path, search, dontLoad, matchInstallName, abortOnError);
-}
-
-bool NSAddLibrary(const char* path)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\")\n", __func__, path);
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- return (addImage(callerAddress, path, false, false, false, false) != NULL);
-}
-
-bool NSAddLibraryWithSearching(const char* path)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\")\n", __func__, path);
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- return (addImage(callerAddress, path, true, false, false, false) != NULL);
-}
-
-
-
-//#define NSADDIMAGE_OPTION_NONE 0x0
-//#define NSADDIMAGE_OPTION_RETURN_ON_ERROR 0x1
-//#define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME 0x8
-
-bool NSIsSymbolNameDefinedInImage(const struct mach_header* mh, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\")\n", __func__, (void *)mh, symbolName);
- ImageLoader* image = dyld::findImageByMachHeader(mh);
- if ( image != NULL ) {
- if ( image->findExportedSymbol(symbolName, true, NULL) != NULL)
- return true;
- }
- return false;
-}
-
-
-NSSymbol NSLookupSymbolInImage(const struct mach_header* mh, const char* symbolName, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\", 0x%08X)\n", __func__, mh, symbolName, options);
- const ImageLoader::Symbol* symbol = NULL;
- dyld::clearErrorMessage();
- ImageLoader* image = dyld::findImageByMachHeader(mh);
- if ( image != NULL ) {
- const char* symbolToFind = symbolName;
- try {
- if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY ) {
- image->bindAllLazyPointers(dyld::gLinkContext, true);
- }
- else if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW ) {
- image->bindAllLazyPointers(dyld::gLinkContext, false);
- }
- }
- catch (const char* msg) {
- if ( (options & NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR) == 0 ) {
- dyldAPIhalt(__func__, msg);
- }
- }
- symbol = image->findExportedSymbol(symbolToFind, true, NULL);
- }
- if ( dyld::gLogAPIs && (symbol == NULL) )
- dyld::log("%s(%p, \"%s\", 0x%08X) ==> NULL\n", __func__, mh, symbolName, options);
- return SymbolToNSSymbol(symbol);
-}
-
-
-// Note: This cannot have public name because dyld is built with a static copy of libc.a
-// which calls NSIsSymbolNameDefined() and expects to find dyld's symbols not host process
-static bool client_NSIsSymbolNameDefined(const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- dyld::log("NSIsSymbolNameDefined(\"%s\")\n", symbolName);
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- return dyld::flatFindExportedSymbol(symbolName, &sym, &image);
-}
-
-bool NSIsSymbolNameDefinedWithHint(const char* symbolName, const char* libraryNameHint)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- bool found = dyld::flatFindExportedSymbolWithHint(symbolName, libraryNameHint, &sym, &image);
- if ( ! found ) {
- // hint failed, do slow search of all images
- found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
- }
- if ( !found && dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\") => false \n", __func__, symbolName, libraryNameHint);
- return found;
-}
-
-const char* NSNameOfSymbol(NSSymbol symbol)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)symbol);
- const char* result = NULL;
- ImageLoader* image = dyld::findImageContainingSymbol(symbol);
- if ( image != NULL )
- result = image->getExportedSymbolName(NSSymbolToSymbol(symbol));
- return result;
-}
-
-void* NSAddressOfSymbol(NSSymbol symbol)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)symbol);
- if ( symbol == NULL )
- return NULL;
- void* result = NULL;
- ImageLoader* image = dyld::findImageContainingSymbol(symbol);
- if ( image != NULL )
- result = (void*)image->getExportedSymbolAddress(NSSymbolToSymbol(symbol), dyld::gLinkContext);
-
-#if __has_feature(ptrauth_calls)
- // Sign the pointer if it points to a function
- if ( result ) {
- const ImageLoader* symbolImage = image;
- if (!symbolImage->containsAddress(result)) {
- symbolImage = dyld::findImageContainingAddress(result);
- }
- const macho_section *sect = symbolImage ? symbolImage->findSection(result) : NULL;
- if ( sect && ((sect->flags & S_ATTR_PURE_INSTRUCTIONS) || (sect->flags & S_ATTR_SOME_INSTRUCTIONS)) )
- result = __builtin_ptrauth_sign_unauthenticated(result, ptrauth_key_asia, 0);
- }
-#endif
- return result;
-}
-
-NSModule NSModuleForSymbol(NSSymbol symbol)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)symbol);
- NSModule result = NULL;
- ImageLoader* image = dyld::findImageContainingSymbol(symbol);
- if ( image != NULL )
- result = ImageLoaderToNSModule(image);
- return result;
-}
-
-
-
-
-bool _dyld_all_twolevel_modules_prebound(void)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
- return FALSE;
-}
-
-bool _dyld_bind_fully_image_containing_address(const void* address)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
- address = stripPointer(address);
- dyld::clearErrorMessage();
- ImageLoader* image = dyld::findImageContainingAddress(address);
- if ( image != NULL ) {
- try {
- image->bindAllLazyPointers(dyld::gLinkContext, true);
- return true;
- }
- catch (const char* msg) {
- dyldAPIhalt(__func__, msg);
- }
- }
- return false;
-}
-
-bool _dyld_image_containing_address(const void* address)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
- ImageLoader *imageLoader = dyld::findImageContainingAddress(address);
- return (NULL != imageLoader);
-}
-
-static NSObjectFileImage createObjectImageFile(ImageLoader* image, const void* address = NULL, size_t len=0)
-{
- NSObjectFileImage result = new __NSObjectFileImage();
- result->image = image;
- result->imageBaseAddress = address;
- result->imageLength = len;
- sObjectFileImages.push_back(result);
- return result;
-}
-
-NSObjectFileImageReturnCode NSCreateObjectFileImageFromFile(const char* pathName, NSObjectFileImage *objectFileImage)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", ...)\n", __func__, pathName);
- try {
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
-
- dyld::LoadContext context;
- context.useSearchPaths = false;
- context.useFallbackPaths = false;
- context.useLdLibraryPath = false;
- context.implicitRPath = false;
- context.matchByInstallName = false;
- context.dontLoad = false;
- context.mustBeBundle = true;
- context.mustBeDylib = false;
- context.canBePIE = false;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = NULL; // support not yet implemented
-
- unsigned cacheIndex;
- ImageLoader* image = dyld::load(pathName, context, cacheIndex);
- // Note: We DO NOT link the image! NSLinkModule will do that
- if ( image != NULL ) {
- if ( !image->isBundle() ) {
- // the image must have been already loaded (since context.mustBeBundle will prevent it from being loaded)
- return NSObjectFileImageInappropriateFile;
- }
- *objectFileImage = createObjectImageFile(image);
- return NSObjectFileImageSuccess;
- }
- }
- catch (const char* msg) {
- //dyld::log("dyld: NSCreateObjectFileImageFromFile() error: %s\n", msg);
- dyld::garbageCollectImages();
- free((void*)msg);
- return NSObjectFileImageInappropriateFile;
- }
- return NSObjectFileImageFailure;
-}
-
-
-NSObjectFileImageReturnCode NSCreateObjectFileImageFromMemory(const void* address, size_t size, NSObjectFileImage *objectFileImage)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, %lu, %p)\n", __func__, address, size, objectFileImage);
-
- try {
- ImageLoader* image = dyld::loadFromMemory((const uint8_t*)address, size, NULL);
- if ( ! image->isBundle() ) {
- // this API can only be used with bundles...
- dyld::garbageCollectImages();
- return NSObjectFileImageInappropriateFile;
- }
- // Note: We DO NOT link the image! NSLinkModule will do that
- if ( image != NULL ) {
- *objectFileImage = createObjectImageFile(image, address, size);
- return NSObjectFileImageSuccess;
- }
- }
- catch (const char* msg) {
- free((void*)msg);
- dyld::garbageCollectImages();
- //dyld::log("dyld: NSCreateObjectFileImageFromMemory() error: %s\n", msg);
- }
- return NSObjectFileImageFailure;
-}
-
-static bool validOFI(NSObjectFileImage objectFileImage)
-{
- const size_t ofiCount = sObjectFileImages.size();
- for (size_t i=0; i < ofiCount; ++i) {
- if ( sObjectFileImages[i] == objectFileImage )
- return true;
- }
- return false;
-}
-
-bool NSDestroyObjectFileImage(NSObjectFileImage objectFileImage)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
-
- if ( validOFI(objectFileImage) ) {
- // a failure during NSLinkModule will delete the image
- if ( objectFileImage->image != NULL ) {
- // if the image has never been linked or has been unlinked, the image is not in the list of valid images
- // and we should delete it
- bool linkedImage = dyld::validImage(objectFileImage->image);
- if ( ! linkedImage ) {
- ImageLoader::deleteImage(objectFileImage->image);
- objectFileImage->image = NULL;
- }
- }
-
- // remove from list of ofi's
- for (std::vector<NSObjectFileImage>::iterator it=sObjectFileImages.begin(); it != sObjectFileImages.end(); it++) {
- if ( *it == objectFileImage ) {
- sObjectFileImages.erase(it);
- break;
- }
- }
-
- // if object was created from a memory, release that memory
- // NOTE: this is the way dyld has always done this. NSCreateObjectFileImageFromMemory() hands over ownership of the memory to dyld
- if ( objectFileImage->imageBaseAddress != NULL ) {
- bool freed = false;
- if ( (dyld::gLibSystemHelpers != NULL) && (dyld::gLibSystemHelpers->version >= 6) ) {
- size_t sz = (*dyld::gLibSystemHelpers->malloc_size)(objectFileImage->imageBaseAddress);
- if ( sz != 0 ) {
- (*dyld::gLibSystemHelpers->free)((void*)(objectFileImage->imageBaseAddress));
- freed = true;
- }
- }
- if ( ! freed )
- vm_deallocate(mach_task_self(), (vm_address_t)objectFileImage->imageBaseAddress, objectFileImage->imageLength);
- }
-
- // free ofi object
- delete objectFileImage;
-
- return true;
- }
- return false;
-}
-
-uint32_t NSSymbolDefinitionCountInObjectFileImage(NSObjectFileImage objectFileImage)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
- return objectFileImage->image->getExportedSymbolCount();
-}
-
-const char* NSSymbolDefinitionNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p,%d)\n", __func__, objectFileImage, ordinal);
- const ImageLoader::Symbol* sym = objectFileImage->image->getIndexedExportedSymbol(ordinal);
- return objectFileImage->image->getExportedSymbolName(sym);
-}
-
-uint32_t NSSymbolReferenceCountInObjectFileImage(NSObjectFileImage objectFileImage)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
- return objectFileImage->image->getImportedSymbolCount();
-}
-
-const char * NSSymbolReferenceNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal,
- bool* tentative_definition)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p,%d)\n", __func__, objectFileImage, ordinal);
- const ImageLoader::Symbol* sym = objectFileImage->image->getIndexedImportedSymbol(ordinal);
- if ( tentative_definition != NULL ) {
- ImageLoader::ReferenceFlags flags = objectFileImage->image->getImportedSymbolInfo(sym);
- if ( (flags & ImageLoader::kTentativeDefinition) != 0 )
- *tentative_definition = true;
- else
- *tentative_definition = false;
- }
- return objectFileImage->image->getImportedSymbolName(sym);
-}
-
-void* NSGetSectionDataInObjectFileImage(NSObjectFileImage objectFileImage,
- const char* segmentName, const char* sectionName, unsigned long* size)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p,%s, %s)\n", __func__, objectFileImage, segmentName, sectionName);
-
- void* start;
- size_t length;
- if ( objectFileImage->image->getSectionContent(segmentName, sectionName, &start, &length) ) {
- if ( size != NULL )
- *size = length;
- return start;
- }
- return NULL;
-}
-
-
-
-bool NSIsSymbolDefinedInObjectFileImage(NSObjectFileImage objectFileImage, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p,%s)\n", __func__, objectFileImage, symbolName);
- const ImageLoader::Symbol* sym = objectFileImage->image->findExportedSymbol(symbolName, true, NULL);
- return ( sym != NULL );
-}
-
-
-
-NSModule NSLinkModule(NSObjectFileImage objectFileImage, const char* moduleName, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\", 0x%08X)\n", __func__, objectFileImage, moduleName, options);
-
- dyld::clearErrorMessage();
- try {
- if ( (options & NSLINKMODULE_OPTION_CAN_UNLOAD) != 0 )
- objectFileImage->image->setCanUnload();
-
- // NSLinkModule allows a bundle to be link multpile times
- // each link causes the bundle to be copied to a new address
- if ( objectFileImage->image->isLinked() ) {
- // already linked, so clone a new one and link it
- objectFileImage->image = dyld::cloneImage(objectFileImage->image);
- }
-
- // for memory based images, set moduleName as the name anyone calling _dyld_get_image_name() will see
- if ( objectFileImage->image->getPath() == NULL ) {
- objectFileImage->image->setPath(moduleName);
- // <rdar://problem/8812589> dyld has NULL paths in image info array
- dyld_image_info info;
- info.imageLoadAddress = objectFileImage->image->machHeader();
- info.imageFilePath = moduleName;
- info.imageFileModDate = 0;
- addImagesToAllImages(1, &info);
- }
-
- // support private bundles
- if ( (options & NSLINKMODULE_OPTION_PRIVATE) != 0 )
- objectFileImage->image->setHideExports();
-
- // set up linking options
- bool forceLazysBound = ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 );
-
- // load libraries, rebase, bind, to make this image usable
- dyld::link(objectFileImage->image, forceLazysBound, false, ImageLoader::RPathChain(NULL,NULL), UINT32_MAX);
-
- // bump reference count to keep this bundle from being garbage collected
- objectFileImage->image->incrementDlopenReferenceCount();
-
- // run initializers unless magic flag says not to
- if ( (options & NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES) == 0 )
- dyld::runInitializers(objectFileImage->image);
-
- return ImageLoaderToNSModule(objectFileImage->image);
- }
- catch (const char* msg) {
- dyld::garbageCollectImages();
- if ( (options & NSLINKMODULE_OPTION_RETURN_ON_ERROR) == 0 )
- dyldAPIhalt(__func__, msg);
- // not halting, so set error state for NSLinkEditError to find
- setLastError(NSLinkEditOtherError, 0, moduleName, msg);
- // dyld::link() deleted the image so lose our reference
- objectFileImage->image = NULL;
- free((void*)msg);
- return NULL;
- }
-}
-
-
-#if OLD_LIBSYSTEM_SUPPORT
-// This is for compatibility with old libSystems (libdyld.a) which process ObjectFileImages outside dyld
-static NSModule _dyld_link_module(NSObjectFileImage object_addr, size_t object_size, const char* moduleName, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\", 0x%08X)\n", "NSLinkModule", object_addr, moduleName, options); // note name/args translation
- ImageLoader* image = NULL;
- dyld::clearErrorMessage();
- try {
- const char* imageName = moduleName;
- image = dyld::loadFromMemory((const uint8_t*)object_addr, object_size, imageName);
-
- if ( image != NULL ) {
- // support private bundles
- if ( (options & NSLINKMODULE_OPTION_PRIVATE) != 0 )
- image->setHideExports();
-
- // set up linking options
- bool forceLazysBound = ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 );
-
- // load libraries, rebase, bind, to make this image usable
- dyld::link(image, forceLazysBound, false, ImageLoader::RPathChain(NULL,NULL), UINT32_MAX);
-
- // run initializers unless magic flag says not to
- if ( (options & NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES) == 0 )
- dyld::runInitializers(image);
- }
- }
- catch (const char* msg) {
- if ( (options & NSLINKMODULE_OPTION_RETURN_ON_ERROR) == 0 )
- dyldAPIhalt("NSLinkModule", msg);
- // not halting, so set error state for NSLinkEditError to find
- setLastError(NSLinkEditOtherError, 0, moduleName, msg);
- // if image was created for this bundle, destroy it
- if ( image != NULL ) {
- dyld::removeImage(image);
- ImageLoader::deleteImage(image);
- }
- image = NULL;
- free((void*)msg);
- }
- return ImageLoaderToNSModule(image);
-}
-#endif
-
-NSSymbol NSLookupSymbolInModule(NSModule module, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\")\n", __func__, (void *)module, symbolName);
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return NULL;
- return SymbolToNSSymbol(image->findExportedSymbol(symbolName, false, NULL));
-}
-
-const char* NSNameOfModule(NSModule module)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, module);
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return NULL;
- return image->getPath();
-}
-
-const char* NSLibraryNameForModule(NSModule module)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, module);
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return NULL;
- return image->getPath();
-}
-
-bool NSUnLinkModule(NSModule module, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, 0x%08X)\n", __func__, module, options);
- if ( module == NULL )
- return false;
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return false;
- dyld::runImageStaticTerminators(image);
- if ( (dyld::gLibSystemHelpers != NULL) && (dyld::gLibSystemHelpers->version >= 13) ) {
- __cxa_range_t ranges[image->segmentCount()];
- int rangeCount = 0;
- for (unsigned int j=0; j < image->segmentCount(); ++j) {
- if ( !image->segExecutable(j) )
- continue;
- ranges[rangeCount].addr = (const void*)image->segActualLoadAddress(j);
- ranges[rangeCount].length = image->segSize(j);
- ++rangeCount;
- }
- (*dyld::gLibSystemHelpers->cxa_finalize_ranges)(ranges, rangeCount);
- }
- dyld::removeImage(image);
-
- if ( (options & NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED) != 0 )
- image->setLeaveMapped();
-
- // TODO: NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES
-
- // Only delete image if there is no ofi referencing it
- // That means the ofi was destroyed after linking, so no one is left to delete this image
- const size_t ofiCount = sObjectFileImages.size();
- bool found = false;
- for (size_t i=0; i < ofiCount; ++i) {
- NSObjectFileImage ofi = sObjectFileImages[i];
- if ( ofi->image == image )
- found = true;
- }
- if ( !found )
- ImageLoader::deleteImage(image);
-
- return true;
-}
-
-// internal name and parameters do not match public name and parameters...
-static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit)
-{
- if ( dyld::gLogAPIs )
- dyld::log("NSLinkEditErrorHandlers()\n");
-
- dyld::registerUndefinedHandler((dyld::UndefinedHandler)undefined);
- // no support for multiple or linkedit handlers
-}
-
-
-
-
-void NSLinkEditError(NSLinkEditErrors* c, int* errorNumber, const char** fileName, const char** errorString)
-{
- // FIXME FIXME
- *c = sLastErrorFileCode;
- *errorNumber = sLastErrorNo;
- *fileName = sLastErrorFilePath;
- *errorString = dyld::getErrorMessage();
-}
-
-
-
-static void _dyld_register_binding_handler(void * (*bindingHandler)(const char *, const char *, void *), ImageLoader::BindingOptions bindingOptions)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
- dyld::gLinkContext.bindingHandler = bindingHandler;
- dyld::gLinkContext.bindingOptions = bindingOptions;
-}
-
-#endif //DEPRECATED_APIS_SUPPORTED
-
-
-// Call by fork() in libSystem after the kernel trap is done on the child side
-void _dyld_fork_child()
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
- // The implementation of fork() in libSystem knows to reset the variable mach_task_self_
- // in libSystem for the child of a fork. But dyld is built with a static copy
- // of libc.a and has its own copy of mach_task_self_ which we reset here.
- //
- // In mach_init.h mach_task_self() is #defined to mach_task_self_ and
- // in mach_init() mach_task_self_ is initialized to task_self_trap().
- //
- extern mach_port_t mach_task_self_;
- mach_task_self_ = task_self_trap();
-
- // If dyld is sending load/unload notices to CoreSymbolication, the shared memory
- // page is not copied on fork. <rdar://problem/6797342>
- // NULL the CoreSymbolication shared memory pointer to prevent a crash.
- dyld::gProcessInfo->coreSymbolicationShmPage = NULL;
- // for safety, make sure child starts with clean systemOrderFlag
- dyld::gProcessInfo->systemOrderFlag = 0;
-}
-
-
-#if DEPRECATED_APIS_SUPPORTED
-// returns true if prebinding was used in main executable
-bool _dyld_launched_prebound()
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
-
- // ¥¥¥Êif we deprecate prebinding, we may want to consider always returning true or false here
- return dyld::mainExecutablePrebound();
-}
-
-
-//
-// _dyld_NSMakePrivateModulePublic() is the dyld side of the hack
-// NSMakePrivateModulePublic() needed for the dlopen() to turn it's
-// RTLD_LOCAL handles into RTLD_GLOBAL. It just simply turns off the private
-// flag on the image for this module. If the module was found and it was
-// private then everything worked and TRUE is returned else FALSE is returned.
-//
-static bool NSMakePrivateModulePublic(NSModule module)
-{
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image != NULL ) {
- if ( image->hasHiddenExports() ) {
- image->setHideExports(false);
- return true;
- }
- }
- return false;
-}
-
-#endif // DEPRECATED_APIS_SUPPORTED
-
-int _dyld_func_lookup(const char* name, void** address)
-{
- for (const dyld_func* p = dyld_funcs; p->name != NULL; ++p) {
- if ( strcmp(p->name, name) == 0 ) {
- if( p->implementation == unimplemented )
- dyld::log("unimplemented dyld function: %s\n", p->name);
- *address = p->implementation;
- return true;
- }
- }
- *address = 0;
- return false;
-}
-
-
-static void registerThreadHelpers(const dyld::LibSystemHelpers* helpers)
-{
- dyld::gLibSystemHelpers = helpers;
-
-#if !SUPPORT_ZERO_COST_EXCEPTIONS
- if ( helpers->version >= 5 ) {
- // create key use by dyld exception handling
- pthread_key_t key;
- int result = helpers->pthread_key_create(&key, NULL);
- if ( result == 0 )
- __Unwind_SjLj_SetThreadKey(key);
- }
-#endif
-}
-
-
-static void dlerrorClear()
-{
- if ( dyld::gLibSystemHelpers != NULL ) {
- // <rdar://problem/10595338> dlerror buffer leak
- // dlerrorClear() should not force allocation, but zero it if already allocated
- if ( dyld::gLibSystemHelpers->version >= 10 ) {
- if ( ! (*dyld::gLibSystemHelpers->hasPerThreadBufferFor_dlerror)() )
- return;
- }
-
- // first char of buffer is flag whether string (starting at second char) is valid
- char* buffer = (*dyld::gLibSystemHelpers->getThreadBufferFor_dlerror)(2);
- buffer[0] = '\0';
- buffer[1] = '\0';
- }
-}
-
-static void dlerrorSet(const char* msg)
-{
- if ( dyld::gLibSystemHelpers != NULL ) {
- // first char of buffer is flag whether string (starting at second char) is valid
- char* buffer = (*dyld::gLibSystemHelpers->getThreadBufferFor_dlerror)(strlen(msg)+2);
- buffer[0] = '\1';
- strcpy(&buffer[1], msg);
- }
-}
-
-
-bool dlopen_preflight_internal(const char* path, void* callerAddress)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%s)\n", __func__, path);
-
- dlerrorClear();
-
- CRSetCrashLogMessage("dyld: in dlopen_preflight()");
-
- const bool leafName = (strchr(path, '/') == NULL);
- const bool absolutePath = (path[0] == '/');
-#if TARGET_OS_IPHONE
- char canonicalPath[PATH_MAX];
- // <rdar://problem/7017050> dlopen() not opening frameworks from shared cache with // or ./ in path
- if ( !leafName ) {
- // make path canonical if it contains a // or ./
- if ( (strstr(path, "//") != NULL) || (strstr(path, "./") != NULL) ) {
- const char* lastSlash = strrchr(path, '/');
- char dirPath[PATH_MAX];
- if ( strlcpy(dirPath, path, sizeof(dirPath)) < sizeof(dirPath) ) {
- dirPath[lastSlash-path] = '\0';
- if ( realpath(dirPath, canonicalPath) ) {
- strlcat(canonicalPath, "/", sizeof(canonicalPath));
- if ( strlcat(canonicalPath, lastSlash+1, sizeof(canonicalPath)) < sizeof(canonicalPath) ) {
- // if all fit in buffer, use new canonical path
- path = canonicalPath;
- }
- }
- }
- }
- }
-#endif
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::isPathInCache(path) )
- return true;
-#endif
-
- // <rdar://problem/5910137> dlopen_preflight() on image in shared cache leaves it loaded but not objc initialized
- // if requested path is to something in the dyld shared cache, always succeed
- if ( dyld::inSharedCache(path) )
- return true;
-
-#if TARGET_OS_OSX
- // <rdar://problem/47464387> dlopen_preflight() on symlink to image in shared cache leaves it half loaded
- if ( strncmp(path, "/System/Library/", 16) == 0 ) {
- char canonicalPath[PATH_MAX];
- if ( realpath(path, canonicalPath) ) {
- if ( dyld::inSharedCache(canonicalPath) )
- return true;
- }
- }
-#endif
-
- bool result = false;
- std::vector<const char*> rpathsFromCallerImage;
- try {
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- // for dlopen, use rpath from caller image and from main executable
- if ( callerImage != NULL )
- callerImage->getRPaths(dyld::gLinkContext, rpathsFromCallerImage);
- ImageLoader::RPathChain callersRPaths(NULL, &rpathsFromCallerImage);
- if ( callerImage != dyld::mainExecutable() ) {
- dyld::mainExecutable()->getRPaths(dyld::gLinkContext, rpathsFromCallerImage);
- }
-
- ImageLoader* image = NULL;
- dyld::LoadContext context;
- context.useSearchPaths = true;
- context.useFallbackPaths= leafName; // a partial path implies don't use fallback paths
- context.useLdLibraryPath= leafName; // a leafname implies should search
- context.implicitRPath = !absolutePath; // a non-absolute path implies try rpath searching
- context.matchByInstallName = true;
- context.dontLoad = false;
- context.mustBeBundle = false;
- context.mustBeDylib = false;
- context.canBePIE = true;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = &callersRPaths; // rpaths from caller and main executable
-
- unsigned cacheIndex;
- image = load(path, context, cacheIndex);
- if ( image != NULL ) {
- dyld::preflight(image, callersRPaths, cacheIndex); // image object deleted by dyld::preflight()
- result = true;
- }
- }
- catch (const char* msg) {
- const char* str = dyld::mkstringf("dlopen_preflight(%s): %s", path, msg);
- dlerrorSet(str);
- free((void*)str);
- free((void*)msg); // our free() will do nothing if msg is a string literal
- }
- // free rpaths (getRPaths() malloc'ed each string)
- for(std::vector<const char*>::iterator it=rpathsFromCallerImage.begin(); it != rpathsFromCallerImage.end(); ++it) {
- const char* str = *it;
- free((void*)str);
- }
- CRSetCrashLogMessage(NULL);
- return result;
-}
-
-#if SUPPORT_ACCELERATE_TABLES
-bool static callerIsNonOSApp(void* callerAddress, const char** shortName)
-{
- *shortName = NULL;
- const mach_header* unusedMh;
- const char* unusedPath;
- unsigned unusedIndex;
- // any address in shared cache is not from app
- if ( dyld::addressInCache(callerAddress, &unusedMh, &unusedPath, &unusedIndex) )
- return false;
-
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- if ( callerImage == NULL )
- return false;
-
- *shortName = callerImage->getShortName();
- return ( strncmp(callerImage->getPath(), "/var/containers/", 16) == 0 );
-}
-#endif
-
-void* dlopen_internal(const char* path, int mode, void* callerAddress)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%s, 0x%08X)\n", __func__, ((path==NULL) ? "NULL" : path), mode);
-
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::gLogAppAPIs ) {
- const char* shortName;
- if ( callerIsNonOSApp(callerAddress, &shortName) ) {
- dyld::log("%s: %s(%s, 0x%08X)\n", shortName, __func__, ((path==NULL) ? "NULL" : path), mode);
- }
- }
-#endif
-
- dlerrorClear();
-
- // passing NULL for path means return magic object
- if ( path == NULL ) {
- // RTLD_FIRST means any dlsym() calls on the handle should only search that handle and not subsequent images
- if ( (mode & RTLD_FIRST) != 0 )
- return RTLD_MAIN_ONLY;
- else
- return RTLD_DEFAULT;
- }
-
- // acquire global dyld lock (dlopen is special - libSystem glue does not do locking)
- bool lockHeld = false;
- if ( (dyld::gLibSystemHelpers != NULL) && (dyld::gLibSystemHelpers->version >= 4) ) {
- dyld::gLibSystemHelpers->acquireGlobalDyldLock();
- CRSetCrashLogMessage("dyld: in dlopen()");
- lockHeld = true;
- }
-
- void* result = NULL;
- const bool leafName = (strchr(path, '/') == NULL);
- const bool absolutePath = (path[0] == '/');
-#if TARGET_OS_IPHONE
- char canonicalPath[PATH_MAX];
- // <rdar://problem/7017050> dlopen() not opening frameworks from shared cache with // or ./ in path
- if ( !leafName ) {
- // make path canonical if it contains a // or ./
- if ( (strstr(path, "//") != NULL) || (strstr(path, "./") != NULL) ) {
- const char* lastSlash = strrchr(path, '/');
- char dirPath[PATH_MAX];
- if ( strlcpy(dirPath, path, sizeof(dirPath)) < sizeof(dirPath) ) {
- dirPath[lastSlash-path] = '\0';
- if ( realpath(dirPath, canonicalPath) ) {
- strlcat(canonicalPath, "/", sizeof(canonicalPath));
- if ( strlcat(canonicalPath, lastSlash+1, sizeof(canonicalPath)) < sizeof(canonicalPath) ) {
- // if all fit in buffer, use new canonical path
- path = canonicalPath;
- }
- }
- }
- }
- }
-#endif
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::dlopenFromCache(path, mode, &result) ) {
- // Note: dlopenFromCache() releases the lock
- if ( dyld::gLogAPIs )
- dyld::log(" %s(%s) ==> %p\n", __func__, path, result);
- return result;
- }
-#endif
-
- ImageLoader* image = NULL;
- std::vector<const char*> rpathsFromCallerImage;
- ImageLoader::RPathChain callersRPaths(NULL, &rpathsFromCallerImage);
- try {
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- if ( (mode & RTLD_NOLOAD) == 0 ) {
- // for dlopen, use rpath from caller image and from main executable
- if ( callerImage != NULL )
- callerImage->getRPaths(dyld::gLinkContext, rpathsFromCallerImage);
- if ( callerImage != dyld::mainExecutable() )
- dyld::mainExecutable()->getRPaths(dyld::gLinkContext, rpathsFromCallerImage);
- }
-
- dyld::LoadContext context;
- context.useSearchPaths = true;
- context.useFallbackPaths= leafName; // a partial path means no fallback paths
- context.useLdLibraryPath= leafName; // a leafname implies should search
- context.implicitRPath = !absolutePath; // a non-absolute path implies try rpath searching
- context.matchByInstallName = true;
- context.dontLoad = ( (mode & RTLD_NOLOAD) != 0 );
- context.mustBeBundle = false;
- context.mustBeDylib = false;
- context.canBePIE = true;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = &callersRPaths; // rpaths from caller and main executable
-
- unsigned cacheIndex;
- image = load(path, context, cacheIndex);
-#if SUPPORT_ACCELERATE_TABLES
- if ( (image != NULL) && (cacheIndex != UINT32_MAX) ) {
- // found in cache, but under a different path
- const char* betterPath = dyld::getPathFromIndex(cacheIndex);
- if ( (betterPath != NULL) && dyld::dlopenFromCache(betterPath, mode, &result) ) {
- // Note: dlopenFromCache() releases the lock
- if ( dyld::gLogAPIs )
- dyld::log(" %s(%s) ==> %p\n", __func__, path, result);
- return result;
- }
- }
-#endif
- if ( image != NULL ) {
- // bump reference count. Do this before link() so that if an initializer calls dlopen and fails
- // this image is not garbage collected
- image->incrementDlopenReferenceCount();
- // link in all dependents
- if ( (mode & RTLD_NOLOAD) == 0 ) {
- bool alreadyLinked = image->isLinked();
- bool forceLazysBound = ( (mode & RTLD_NOW) != 0 );
- dyld::link(image, forceLazysBound, false, callersRPaths, cacheIndex);
- if ( alreadyLinked ) {
- // upgrade
- if ( ((mode & RTLD_LOCAL) == 0) && image->hasHiddenExports() )
- image->setHideExports(false);
- }
- else {
- // only hide exports if image is not already in use
- if ( (mode & RTLD_LOCAL) != 0 )
- image->setHideExports(true);
- }
- }
-
- // RTLD_NODELETE means don't unmap image even after dlclosed. This is what dlcompat did on Mac OS X 10.3
- // On other *nix OS's, it means dlclose() should do nothing, but the handle should be invalidated.
- // The subtle differences are:
- // 1) if the image has any termination routines, whether they are run during dlclose or when the process terminates
- // 2) If someone does a supsequent dlopen() on the same image, whether the same address should be used.
- if ( (mode & RTLD_NODELETE) != 0 )
- image->setLeaveMapped();
-
- // release global dyld lock early, this enables initializers to do threaded operations
- if ( lockHeld ) {
- CRSetCrashLogMessage(NULL);
- dyld::gLibSystemHelpers->releaseGlobalDyldLock();
- lockHeld = false;
- }
-
- // RTLD_NOLOAD means dlopen should fail unless path is already loaded.
- // don't run initializers when RTLD_NOLOAD is set. This only matters if dlopen() is
- // called from within an initializer because it can cause initializers to run
- // out of order. Most uses of RTLD_NOLOAD are "probes". If they want initialzers
- // to run, then don't use RTLD_NOLOAD.
- if ( (mode & RTLD_NOLOAD) == 0 ) {
- // run initializers
- dyld::runInitializers(image);
- }
-
- // RTLD_FIRST means any dlsym() calls on the handle should only search that handle and not subsequent images
- // this is tracked by setting the low bit of the handle, which is usually zero by malloc alignment
- if ( (mode & RTLD_FIRST) != 0 )
- result = (void*)(((uintptr_t)image)|1);
- else
- result = image;
- }
- }
- catch (const char* msg) {
- if ( image != NULL ) {
- // load() succeeded but, link() failed
- // back down reference count and do GC
- image->decrementDlopenReferenceCount();
- if ( image->dlopenCount() == 0 )
- dyld::garbageCollectImages();
- }
- const char* str = dyld::mkstringf("dlopen(%s, %d): %s", path, mode, msg);
- if ( dyld::gLogAPIs )
- dyld::log(" %s() failed, error: '%s'\n", __func__, str);
- dlerrorSet(str);
- free((void*)str);
- free((void*)msg); // our free() will do nothing if msg is a string literal
- result = NULL;
- }
- // free rpaths (getRPaths() malloc'ed each string)
- for(std::vector<const char*>::iterator it=rpathsFromCallerImage.begin(); it != rpathsFromCallerImage.end(); ++it) {
- const char* str = *it;
- free((void*)str);
- }
-
- // when context.dontLoad is set, load() returns NULL instead of throwing an exception
- if ( (mode & RTLD_NOLOAD) && (result == NULL) ) {
- dlerrorSet("image not already loaded");
- }
-
- if ( lockHeld ) {
- CRSetCrashLogMessage(NULL);
- dyld::gLibSystemHelpers->releaseGlobalDyldLock();
- }
- if ( dyld::gLogAPIs && (result != NULL) )
- dyld::log(" %s(%s) ==> %p\n", __func__, path, result);
- return result;
-}
-
-int dlclose(void* handle)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, handle);
-
- // silently accept magic handles for main executable
- if ( handle == RTLD_MAIN_ONLY )
- return 0;
- if ( handle == RTLD_DEFAULT )
- return 0;
-
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::isCacheHandle(handle) ) {
- dlerrorClear();
- return 0;
- }
-#endif
-
- ImageLoader* image = (ImageLoader*)(((uintptr_t)handle) & (-4)); // clear mode bits
- if ( dyld::validImage(image) ) {
- dlerrorClear();
- // decrement use count
- if ( image->decrementDlopenReferenceCount() ) {
- dlerrorSet("dlclose() called too many times");
- return -1;
- }
- // remove image if reference count went to zero
- if ( image->dlopenCount() == 0 )
- dyld::garbageCollectImages();
- return 0;
- }
- else {
- dlerrorSet("invalid handle passed to dlclose()");
- return -1;
- }
-}
-
-
-
-int dladdr(const void* address, Dl_info* info)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, %p)\n", __func__, address, info);
-
- // <rdar://problem/42171466> calling dladdr(xx,NULL) crashes
- if ( info == NULL )
- return 0; // failure
-
- address = stripPointer(address);
-
- CRSetCrashLogMessage("dyld: in dladdr()");
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::dladdrFromCache(address, info) ) {
- CRSetCrashLogMessage(NULL);
- return 1; // success
- }
-#endif
-
- ImageLoader* image = dyld::findImageContainingAddress(address);
- if ( image != NULL ) {
- info->dli_fname = image->getRealPath();
- info->dli_fbase = (void*)image->machHeader();
- if ( address == info->dli_fbase ) {
- // special case lookup of header
- info->dli_sname = "__dso_handle";
- info->dli_saddr = info->dli_fbase;
- CRSetCrashLogMessage(NULL);
- return 1; // success
- }
- // find closest symbol in the image
- info->dli_sname = image->findClosestSymbol(address, (const void**)&info->dli_saddr);
- // never return the mach_header symbol
- if ( info->dli_saddr == info->dli_fbase ) {
- info->dli_sname = NULL;
- info->dli_saddr = NULL;
- CRSetCrashLogMessage(NULL);
- return 1; // success
- }
- if ( info->dli_sname != NULL ) {
- if ( info->dli_sname[0] == '_' )
- info->dli_sname = info->dli_sname +1; // strip off leading underscore
- //dyld::log("dladdr(%p) => %p %s\n", address, info->dli_saddr, info->dli_sname);
- CRSetCrashLogMessage(NULL);
- return 1; // success
- }
- info->dli_sname = NULL;
- info->dli_saddr = NULL;
- CRSetCrashLogMessage(NULL);
- return 1; // success
- }
- CRSetCrashLogMessage(NULL);
- return 0; // failure
-}
-
-
-char* dlerror()
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
-
- if ( dyld::gLibSystemHelpers != NULL ) {
- // if using newer libdyld.dylib and buffer if buffer not yet allocated, return NULL
- if ( dyld::gLibSystemHelpers->version >= 10 ) {
- if ( ! (*dyld::gLibSystemHelpers->hasPerThreadBufferFor_dlerror)() )
- return NULL;
- }
-
- // first char of buffer is flag whether string (starting at second char) is valid
- char* buffer = (*dyld::gLibSystemHelpers->getThreadBufferFor_dlerror)(2);
- if ( buffer[0] != '\0' ) { // if valid buffer
- buffer[0] = '\0'; // mark invalid, so next call to dlerror returns NULL
- return &buffer[1]; // return message
- }
- }
- return NULL;
-}
-
-void* dlsym_internal(void* handle, const char* symbolName, void* callerAddress)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, %s)\n", __func__, handle, symbolName);
-
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::gLogAppAPIs ) {
- const char* shortName;
- if ( callerIsNonOSApp(callerAddress, &shortName) ) {
- dyld::log("%s: %s(%p, %s)\n", shortName, __func__, handle, symbolName);
- }
- }
-#endif
-
- CRSetCrashLogMessage("dyld: in dlsym()");
- dlerrorClear();
-
- const ImageLoader* image;
- const ImageLoader::Symbol* sym;
- void* result;
-
- // dlsym() assumes symbolName passed in is same as in C source code
- // dyld assumes all symbol names have an underscore prefix
- char underscoredName[strlen(symbolName)+2];
- underscoredName[0] = '_';
- strcpy(&underscoredName[1], symbolName);
-
- // magic "search all" handle
- if ( handle == RTLD_DEFAULT ) {
- if ( dyld::flatFindExportedSymbol(underscoredName, &sym, &image) ) {
- CRSetCrashLogMessage(NULL);
- result = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext, NULL, false, underscoredName);
-#if __has_feature(ptrauth_calls)
- // Sign the pointer if it points to a function
- // Note we only do this if the main executable is arm64e as otherwise we
- // may end up calling containsAddress on the accelerator tables.
- if ( result && ((dyld::gLinkContext.mainExecutable->machHeader()->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E) ) {
- const ImageLoader* symbolImage = image;
- if (!symbolImage->containsAddress(result)) {
- symbolImage = dyld::findImageContainingAddress(result);
- }
- const macho_section *sect = symbolImage ? symbolImage->findSection(result) : NULL;
- if ( sect && ((sect->flags & S_ATTR_PURE_INSTRUCTIONS) || (sect->flags & S_ATTR_SOME_INSTRUCTIONS)) )
- result = __builtin_ptrauth_sign_unauthenticated(result, ptrauth_key_asia, 0);
- }
-#endif
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_DEFAULT, %s) ==> %p\n", __func__, symbolName, result);
- return result;
- }
- const char* str = dyld::mkstringf("dlsym(RTLD_DEFAULT, %s): symbol not found", symbolName);
- dlerrorSet(str);
- free((void*)str);
- CRSetCrashLogMessage(NULL);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_DEFAULT, %s) ==> NULL\n", __func__, symbolName);
- return NULL;
- }
-
- // magic "search only main executable" handle
- else if ( handle == RTLD_MAIN_ONLY ) {
- image = dyld::mainExecutable();
- sym = image->findExportedSymbol(underscoredName, true, &image); // search RTLD_FIRST way
- if ( sym != NULL ) {
- CRSetCrashLogMessage(NULL);
- result = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext, NULL, false, underscoredName);
-#if __has_feature(ptrauth_calls)
- // Sign the pointer if it points to a function
- // Note we only do this if the main executable is arm64e as otherwise we
- // may end up calling containsAddress on the accelerator tables.
- if ( result && ((dyld::gLinkContext.mainExecutable->machHeader()->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E) ) {
- const ImageLoader* symbolImage = image;
- if (!symbolImage->containsAddress(result)) {
- symbolImage = dyld::findImageContainingAddress(result);
- }
- const macho_section *sect = symbolImage ? symbolImage->findSection(result) : NULL;
- if ( sect && ((sect->flags & S_ATTR_PURE_INSTRUCTIONS) || (sect->flags & S_ATTR_SOME_INSTRUCTIONS)) )
- result = __builtin_ptrauth_sign_unauthenticated(result, ptrauth_key_asia, 0);
- }
-#endif
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_MAIN_ONLY, %s) ==> %p\n", __func__, symbolName, result);
- return result;
- }
- const char* str = dyld::mkstringf("dlsym(RTLD_MAIN_ONLY, %s): symbol not found", symbolName);
- dlerrorSet(str);
- free((void*)str);
- CRSetCrashLogMessage(NULL);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_MAIN_ONLY, %s) ==> NULL\n", __func__, symbolName);
- return NULL;
- }
-
- // magic "search what I would see" handle
- else if ( handle == RTLD_NEXT ) {
-#if SUPPORT_ACCELERATE_TABLES
- const mach_header* mh;
- const char* path;
- unsigned index;
- if ( dyld::addressInCache(callerAddress, &mh, &path, &index) ) {
- // if dylib in cache is calling dlsym(RTLD_NEXT,xxx) handle search differently
- result = dyld::dlsymFromCache(RTLD_NEXT, underscoredName, index);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_NEXT, %s) ==> %p\n", __func__, symbolName, result);
- return result;
- }
-#endif
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- sym = callerImage->findExportedSymbolInDependentImages(underscoredName, dyld::gLinkContext, &image); // don't search image, but do search what it links against
- if ( sym != NULL ) {
- CRSetCrashLogMessage(NULL);
- result = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext , callerImage, false, underscoredName);
-#if __has_feature(ptrauth_calls)
- // Sign the pointer if it points to a function
- // Note we only do this if the main executable is arm64e as otherwise we
- // may end up calling containsAddress on the accelerator tables.
- if ( result && ((dyld::gLinkContext.mainExecutable->machHeader()->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E) ) {
- const ImageLoader* symbolImage = image;
- if (!symbolImage->containsAddress(result)) {
- symbolImage = dyld::findImageContainingAddress(result);
- }
- const macho_section *sect = symbolImage ? symbolImage->findSection(result) : NULL;
- if ( sect && ((sect->flags & S_ATTR_PURE_INSTRUCTIONS) || (sect->flags & S_ATTR_SOME_INSTRUCTIONS)) )
- result = __builtin_ptrauth_sign_unauthenticated(result, ptrauth_key_asia, 0);
- }
-#endif
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_NEXT, %s) ==> %p\n", __func__, symbolName, result);
- return result;
- }
- const char* str = dyld::mkstringf("dlsym(RTLD_NEXT, %s): symbol not found", symbolName);
- dlerrorSet(str);
- free((void*)str);
- CRSetCrashLogMessage(NULL);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_NEXT, %s) ==> NULL\n", __func__, symbolName);
- return NULL;
- }
- // magic "search me, then what I would see" handle
- else if ( handle == RTLD_SELF ) {
-#if SUPPORT_ACCELERATE_TABLES
- const mach_header* mh;
- const char* path;
- unsigned index;
- if ( dyld::addressInCache(callerAddress, &mh, &path, &index) ) {
- // if dylib in cache is calling dlsym(RTLD_SELF,xxx) handle search differently
- result = dyld::dlsymFromCache(RTLD_SELF, underscoredName, index);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_SELF, %s) ==> %p\n", __func__, symbolName, result);
- return result;
- }
-#endif
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- sym = callerImage->findExportedSymbolInImageOrDependentImages(underscoredName, dyld::gLinkContext, &image); // search image and what it links against
- if ( sym != NULL ) {
- CRSetCrashLogMessage(NULL);
- result = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext, callerImage, false, underscoredName);
-#if __has_feature(ptrauth_calls)
- // Sign the pointer if it points to a function
- // Note we only do this if the main executable is arm64e as otherwise we
- // may end up calling containsAddress on the accelerator tables.
- if ( result && ((dyld::gLinkContext.mainExecutable->machHeader()->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E) ) {
- const ImageLoader* symbolImage = image;
- if (!symbolImage->containsAddress(result)) {
- symbolImage = dyld::findImageContainingAddress(result);
- }
- const macho_section *sect = symbolImage ? symbolImage->findSection(result) : NULL;
- if ( sect && ((sect->flags & S_ATTR_PURE_INSTRUCTIONS) || (sect->flags & S_ATTR_SOME_INSTRUCTIONS)) )
- result = __builtin_ptrauth_sign_unauthenticated(result, ptrauth_key_asia, 0);
- }
-#endif
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_SELF, %s) ==> %p\n", __func__, symbolName, result);
- return result;
- }
- const char* str = dyld::mkstringf("dlsym(RTLD_SELF, %s): symbol not found", symbolName);
- dlerrorSet(str);
- free((void*)str);
- CRSetCrashLogMessage(NULL);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(RTLD_SELF, %s) ==> NULL\n", __func__, symbolName);
- return NULL;
- }
-#if SUPPORT_ACCELERATE_TABLES
- // check for mega dylib handle
- else if ( dyld::isCacheHandle(handle) ) {
- result = dyld::dlsymFromCache(handle, underscoredName, 0);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(%p, %s) ==> %p\n", __func__, handle, symbolName, result);
- return result;
- }
-#endif
- // real handle
- image = (ImageLoader*)(((uintptr_t)handle) & (-4)); // clear mode bits
- if ( dyld::validImage(image) ) {
- if ( (((uintptr_t)handle) & 1) != 0 )
- sym = image->findExportedSymbol(underscoredName, true, &image); // search RTLD_FIRST way
- else
- sym = image->findExportedSymbolInImageOrDependentImages(underscoredName, dyld::gLinkContext, &image); // search image and what it links against
-
- if ( sym != NULL ) {
- CRSetCrashLogMessage(NULL);
- ImageLoader* callerImage = NULL;
- if ( sDynamicInterposing ) {
- // only take time to look up caller, if dynamic interposing in use
- callerImage = dyld::findImageContainingAddress(callerAddress);
- }
- result = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext, callerImage, false, underscoredName);
-#if __has_feature(ptrauth_calls)
- // Sign the pointer if it points to a function
- // Note we only do this if the main executable is arm64e as otherwise we
- // may end up calling containsAddress on the accelerator tables.
- if ( result && ((dyld::gLinkContext.mainExecutable->machHeader()->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E) ) {
- const ImageLoader* symbolImage = image;
- if (!symbolImage->containsAddress(result)) {
- symbolImage = dyld::findImageContainingAddress(result);
- }
- const macho_section *sect = symbolImage ? symbolImage->findSection(result) : NULL;
- if ( sect && ((sect->flags & S_ATTR_PURE_INSTRUCTIONS) || (sect->flags & S_ATTR_SOME_INSTRUCTIONS)) )
- result = __builtin_ptrauth_sign_unauthenticated(result, ptrauth_key_asia, 0);
- }
-#endif
- if ( dyld::gLogAPIs )
- dyld::log(" %s(%p, %s) ==> %p\n", __func__, handle, symbolName, result);
- return result;
- }
- const char* str = dyld::mkstringf("dlsym(%p, %s): symbol not found", handle, symbolName);
- dlerrorSet(str);
- free((void*)str);
- }
- else {
- dlerrorSet("invalid handle passed to dlsym()");
- }
- CRSetCrashLogMessage(NULL);
- if ( dyld::gLogAPIs )
- dyld::log(" %s(%p, %s) ==> NULL\n", __func__, handle, symbolName);
- return NULL;
-}
-
-// Note this is only here to support ___pthread_abort in libpthread.a
-void* dlsym(void* handle, const char* symbolName) {
- return dlsym_internal(handle, symbolName, __builtin_return_address(1));
-}
-
-
-// <rdar://problem/40352925> *_compat functions are for old binaries that have __dyld section and use it to bypass libdyld.dylib
-void* dlopen_compat(const char* path, int mode)
-{
- return dlopen_internal(path, mode, (void*)dyld::mainExecutable()->machHeader());
-}
-bool dlopen_preflight_compat(const char* path)
-{
- return dlopen_preflight_internal(path, (void*)dyld::mainExecutable()->machHeader());
-}
-void* dlsym_compat(void* handle, const char* symbolName)
-{
- return dlsym_internal(handle, symbolName, (void*)dyld::mainExecutable()->machHeader());
-}
-
-
-
-
-const struct dyld_all_image_infos* _dyld_get_all_image_infos()
-{
- return dyld::gProcessInfo;
-}
-
-
-#if SUPPORT_ZERO_COST_EXCEPTIONS
-static bool client_dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info)
-{
- //if ( dyld::gLogAPIs )
- // dyld::log("%s(%p, %p)\n", __func__, addr, info);
-
- addr = stripPointer(addr);
-
-#if SUPPORT_ACCELERATE_TABLES
- if ( dyld::findUnwindSections(addr, info) )
- return true;
-#endif
- ImageLoader* image = dyld::findImageContainingAddress(addr);
- if ( image != NULL ) {
- image->getUnwindInfo(info);
- return true;
- }
- return false;
-}
-#endif
-
-
-const char* dyld_image_path_containing_address(const void* address)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
-
- address = (void*)stripPointer(address);
-
-#if SUPPORT_ACCELERATE_TABLES
- const mach_header* mh;
- const char* path;
- if ( dyld::addressInCache(address, &mh, &path) )
- return path;
-#endif
-
- ImageLoader* image = dyld::findImageContainingAddress(address);
- if ( image != NULL ) {
- return image->getRealPath();
- }
- return NULL;
-}
-
-
-
-bool dyld_shared_cache_some_image_overridden()
-{
- return dyld::gSharedCacheOverridden;
-}
-
-
-void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count)
-{
- if ( mh == NULL )
- return;
- if ( array == NULL )
- return;
- if ( count == 0 )
- return;
- ImageLoader* image = dyld::findImageByMachHeader(mh);
- if ( image == NULL )
- return;
-
- // make the cache writable for this block
- DyldSharedCache::DataConstScopedWriter patcher(dyld::gLinkContext.dyldCache, mach_task_self(), (dyld::gLinkContext.verboseMapping ? &dyld::log : nullptr));
-
- // make pass at bound references in this image and update them
- dyld::gLinkContext.dynamicInterposeArray = array;
- dyld::gLinkContext.dynamicInterposeCount = count;
- image->dynamicInterpose(dyld::gLinkContext);
- dyld::gLinkContext.dynamicInterposeArray = NULL;
- dyld::gLinkContext.dynamicInterposeCount = 0;
-
- // leave interposing info so any future (lazy) binding will get it too
- image->addDynamicInterposingTuples(array, count);
-
- sDynamicInterposing = true;
-}
-
-
-bool _dyld_is_memory_immutable(const void* addr, size_t length)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, %ld)\n", __func__, addr, length);
-
- uintptr_t checkStart = (uintptr_t)addr;
- uintptr_t checkEnd = checkStart + length;
-
- // quick check to see if in r/o region of shared cache. If so return true.
- const DyldSharedCache* cache = (DyldSharedCache*)dyld::imMemorySharedCacheHeader();
- if ( cache != nullptr ) {
- const dyld_cache_mapping_info* const mappings = (dyld_cache_mapping_info*)((char*)cache + cache->header.mappingOffset);
- uintptr_t roStart = (uintptr_t)cache;
- uintptr_t roEnd = roStart + (uintptr_t)mappings[0].size;
- if ( (roStart < checkStart) && (checkEnd < roEnd) )
- return true;
- }
-
- // Otherwise find if addr is in a dyld loaded image
- ImageLoader* image = dyld::findImageContainingAddress(addr);
- if ( image != NULL ) {
- // <rdar://problem/24091154> already checked for r/o portion of cache
- if ( image->inSharedCache() )
- return false;
- if ( !image->neverUnload() )
- return false;
- for (unsigned i=0, e=image->segmentCount(); i < e; ++i) {
- if ( (image->segActualLoadAddress(i) < checkStart) && (checkEnd < image->segActualEndAddress(i)) ) {
- return !image->segWriteable(i);
- }
- }
- }
- return false;
-}
-
-
-
-void _dyld_objc_notify_register(_dyld_objc_notify_mapped mapped,
- _dyld_objc_notify_init init,
- _dyld_objc_notify_unmapped unmapped)
-{
- dyld::registerObjCNotifiers(mapped, init, unmapped);
-}
-
-
-bool _dyld_get_shared_cache_uuid(uuid_t uuid)
-{
- return dyld::sharedCacheUUID(uuid);
-}
-
-const void* _dyld_get_shared_cache_range(size_t* length)
-{
- const DyldSharedCache* cache = (DyldSharedCache*)dyld::imMemorySharedCacheHeader();
- if ( cache != nullptr ) {
- const dyld_cache_mapping_info* const mappings = (dyld_cache_mapping_info*)((char*)cache + cache->header.mappingOffset);
- const dyld_cache_mapping_info* lastMapping = &mappings[cache->header.mappingCount - 1];
- *length = (size_t)((lastMapping->address + lastMapping->size) - cache->unslidLoadAddress());
- return cache;
- }
- return nullptr;
-}
-
-void _dyld_images_for_addresses(unsigned count, const void* addresses[], struct dyld_image_uuid_offset infos[])
-{
- for (unsigned i=0; i < count; ++i) {
- const void* addr = addresses[i];
- addr = stripPointer(addr);
- bzero(&infos[i], sizeof(dyld_image_uuid_offset));
-#if SUPPORT_ACCELERATE_TABLES
- const mach_header* mh;
- const char* path;
- if ( dyld::addressInCache(addr, &mh, &path) ) {
- infos[i].image = mh;
- infos[i].offsetInImage = (uintptr_t)addr - (uintptr_t)mh;
- ((dyld3::MachOFile*)mh)->getUuid(infos[i].uuid);
- continue;
- }
-#endif
- ImageLoader* image = dyld::findImageContainingAddress(addr);
- if ( image != nullptr ) {
- infos[i].image = image->machHeader();
- infos[i].offsetInImage = (uintptr_t)addr - (uintptr_t)(image->machHeader());
- image->getUUID(infos[i].uuid);
- }
- }
-}
-
-void _dyld_register_for_image_loads(void (*func)(const mach_header* mh, const char* path, bool unloadable))
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)func);
- dyld::registerLoadCallback(func);
-}
-
-void _dyld_register_for_bulk_image_loads(void (*func)(unsigned imageCount, const struct mach_header* mhs[], const char* paths[]))
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)func);
- dyld::registerBulkLoadCallback(func);
-}
-
-void _dyld_register_driverkit_main(void (*mainFunc)())
-{
- dyld::setMainEntry(mainFunc);
-}
-
-