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--- dyld/dyld-96.2/src/dyldAPIs.cpp
+++ dyld/dyld-852.2/src/dyldAPIs.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2009 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -33,6 +33,7 @@
#include <string.h>
#include <sys/param.h>
#include <sys/mount.h>
+#include <Availability.h>
#include <vector>
@@ -42,56 +43,114 @@
#include <mach/mach.h>
#include <sys/time.h>
#include <sys/sysctl.h>
-
-extern "C" mach_port_name_t task_self_trap(void); // can't include <System/mach/mach_traps.h> because it is missing extern C
-
-#include "mach-o/dyld_images.h"
-#include "mach-o/dyld.h"
-#include "mach-o/dyld_priv.h"
-#include "mach-o/dyld-update-prebinding.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 "dyld.h"
+#include "ImageLoaderMachO.h"
+#include "dyld2.h"
#include "dyldLibSystemInterface.h"
+#include "DyldSharedCache.h"
+#include "MachOFile.h"
#undef _POSIX_C_SOURCE
-#include "dlfcn.h"
-
-
-#ifndef RTLD_DLL
- #define RTLD_DLL 0x200 /* Mac OS X 10.5 and later */
-#endif
-
+#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 (__ppc__ || __i386__)
-
+#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 void _dyld_fork_child();
-static void _dyld_make_delayed_module_initializer_calls();
static bool NSMakePrivateModulePublic(NSModule module);
static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header);
-static void registerThreadHelpers(const dyld::LibSystemHelpers*);
-static const struct dyld_all_image_infos* _dyld_get_all_image_infos();
// 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()
{
@@ -103,37 +162,65 @@
void* implementation;
};
-static struct dyld_func dyld_funcs[] = {
- {"__dyld_register_thread_helpers", (void*)registerThreadHelpers },
+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_make_delayed_module_initializer_calls", (void*)_dyld_make_delayed_module_initializer_calls },
- {"__dyld_fork_child", (void*)_dyld_fork_child },
- {"__dyld_dyld_register_image_state_change_handler", (void*)dyld_register_image_state_change_handler },
{"__dyld_dladdr", (void*)dladdr },
{"__dyld_dlclose", (void*)dlclose },
{"__dyld_dlerror", (void*)dlerror },
- {"__dyld_dlopen", (void*)dlopen },
- {"__dyld_dlsym", (void*)dlsym },
- {"__dyld_dlopen_preflight", (void*)dlopen_preflight },
- {"__dyld_get_image_header_containing_address", (void*)_dyld_get_image_header_containing_address },
+ {"__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 },
-
- // the rest of these are either deprecated or SPIs
+
+ // 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_objc_module", (void*)_dyld_bind_objc_module },
{"__dyld_bind_fully_image_containing_address", (void*)_dyld_bind_fully_image_containing_address },
{"__dyld_image_containing_address", (void*)_dyld_image_containing_address },
- {"__dyld_moninit", (void*)_dyld_moninit },
{"__dyld_register_binding_handler", (void*)_dyld_register_binding_handler },
{"__dyld_NSNameOfSymbol", (void*)NSNameOfSymbol },
{"__dyld_NSAddressOfSymbol", (void*)NSAddressOfSymbol },
@@ -154,28 +241,34 @@
{"__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_install_link_edit_symbol_handlers", (void*)dyld::registerZeroLinkHandlers },
{"__dyld_NSCreateObjectFileImageFromFile", (void*)NSCreateObjectFileImageFromFile },
{"__dyld_NSCreateObjectFileImageFromMemory", (void*)NSCreateObjectFileImageFromMemory },
{"__dyld_NSDestroyObjectFileImage", (void*)NSDestroyObjectFileImage },
{"__dyld_NSLinkModule", (void*)NSLinkModule },
- {"__dyld_NSHasModInitObjectFileImage", (void*)NSHasModInitObjectFileImage },
{"__dyld_NSSymbolDefinitionCountInObjectFileImage", (void*)NSSymbolDefinitionCountInObjectFileImage },
{"__dyld_NSSymbolDefinitionNameInObjectFileImage", (void*)NSSymbolDefinitionNameInObjectFileImage },
{"__dyld_NSIsSymbolDefinedInObjectFileImage", (void*)NSIsSymbolDefinedInObjectFileImage },
{"__dyld_NSSymbolReferenceNameInObjectFileImage", (void*)NSSymbolReferenceNameInObjectFileImage },
{"__dyld_NSSymbolReferenceCountInObjectFileImage", (void*)NSSymbolReferenceCountInObjectFileImage },
{"__dyld_NSGetSectionDataInObjectFileImage", (void*)NSGetSectionDataInObjectFileImage },
- {"__dyld_NSFindSectionAndOffsetInObjectFileImage", (void*)NSFindSectionAndOffsetInObjectFileImage },
#if OLD_LIBSYSTEM_SUPPORT
{"__dyld_link_module", (void*)_dyld_link_module },
#endif
- {"__dyld_dlord", (void*)dlord },
- {"__dyld_get_all_image_infos", (void*)_dyld_get_all_image_infos },
+#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)
@@ -207,6 +300,10 @@
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;
@@ -219,13 +316,6 @@
//
-static void dyldAPIhalt(const char* apiName, const char* errorMsg)
-{
- dyld::log("dyld: %s() error\n", apiName);
- dyld::halt(errorMsg);
-}
-
-
static void setLastError(NSLinkEditErrors code, int errnum, const char* file, const char* message)
{
@@ -236,6 +326,7 @@
sLastErrorNo = errnum;
}
+#endif // DEPRECATED_APIS_SUPPORTED
/*
*_dyld_NSGetExecutablePath is the dyld side of _NSGetExecutablePath which
@@ -253,13 +344,126 @@
dyld::log("%s(...)\n", __func__);
const char* exePath = dyld::getExecutablePath();
if(*bufsize < strlen(exePath) + 1){
- *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
@@ -387,23 +591,7 @@
return NULL;
}
-uint32_t _dyld_image_count(void)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
- return dyld::getImageCount();
-}
-
-const struct mach_header* _dyld_get_image_header(uint32_t image_index)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%u)\n", __func__, image_index);
- ImageLoader* image = dyld::getIndexedImage(image_index);
- if ( image != NULL )
- return (struct mach_header*)image->machHeader();
- else
- return NULL;
-}
+
static __attribute__((noinline))
@@ -423,21 +611,23 @@
}
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.findDLL = false;
+ context.canBePIE = false;
context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
context.rpath = &callersRPaths; // rpaths from caller and main executable
-
- image = load(path, context);
+
+ unsigned cacheIndex;
+ image = load(path, context, cacheIndex);
if ( image != NULL ) {
if ( context.matchByInstallName )
image->setMatchInstallPath(true);
- dyld::link(image, false, callersRPaths);
+ dyld::link(image, false, false, callersRPaths, cacheIndex);
dyld::runInitializers(image);
// images added with NSAddImage() can never be unloaded
image->setNeverUnload();
@@ -476,7 +666,7 @@
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 );
+ 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);
}
@@ -509,11 +699,12 @@
dyld::log("%s(%p, \"%s\")\n", __func__, (void *)mh, symbolName);
ImageLoader* image = dyld::findImageByMachHeader(mh);
if ( image != NULL ) {
- if ( image->findExportedSymbol(symbolName, NULL, true, NULL) != 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)
{
@@ -523,6 +714,7 @@
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);
@@ -536,7 +728,7 @@
dyldAPIhalt(__func__, msg);
}
}
- symbol = image->findExportedSymbol(symbolName, NULL, true, NULL);
+ symbol = image->findExportedSymbol(symbolToFind, true, NULL);
}
if ( dyld::gLogAPIs && (symbol == NULL) )
dyld::log("%s(%p, \"%s\", 0x%08X) ==> NULL\n", __func__, mh, symbolName, options);
@@ -576,7 +768,7 @@
if ( dyld::gLogAPIs )
dyld::log("%s(%p)\n", __func__, (void *)symbol);
const char* result = NULL;
- ImageLoader* image = dyld::findImageContainingAddress(symbol);
+ ImageLoader* image = dyld::findImageContainingSymbol(symbol);
if ( image != NULL )
result = image->getExportedSymbolName(NSSymbolToSymbol(symbol));
return result;
@@ -586,10 +778,25 @@
{
if ( dyld::gLogAPIs )
dyld::log("%s(%p)\n", __func__, (void *)symbol);
+ if ( symbol == NULL )
+ return NULL;
void* result = NULL;
- ImageLoader* image = dyld::findImageContainingAddress(symbol);
+ 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;
}
@@ -598,56 +805,27 @@
if ( dyld::gLogAPIs )
dyld::log("%s(%p)\n", __func__, (void *)symbol);
NSModule result = NULL;
- ImageLoader* image = dyld::findImageContainingAddress(symbol);
+ ImageLoader* image = dyld::findImageContainingSymbol(symbol);
if ( image != NULL )
result = ImageLoaderToNSModule(image);
return result;
}
-intptr_t _dyld_get_image_vmaddr_slide(uint32_t image_index)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%u)\n", __func__, image_index);
- ImageLoader* image = dyld::getIndexedImage(image_index);
- if ( image != NULL )
- return image->getSlide();
- else
- return 0;
-}
-
-const char* _dyld_get_image_name(uint32_t image_index)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%u)\n", __func__, image_index);
- ImageLoader* image = dyld::getIndexedImage(image_index);
- if ( image != NULL )
- return image->getLogicalPath();
- else
- return NULL;
-}
-
bool _dyld_all_twolevel_modules_prebound(void)
{
if ( dyld::gLogAPIs )
dyld::log("%s()\n", __func__);
- return FALSE; // fixme
-}
-
-void _dyld_bind_objc_module(const void *objc_module)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objc_module);
- // do nothing, with new dyld everything already bound
-}
-
+ 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 ) {
@@ -690,17 +868,19 @@
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.findDLL = false;
+ context.canBePIE = false;
context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
context.rpath = NULL; // support not yet implemented
- ImageLoader* image = dyld::load(pathName, context);
+ 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() ) {
@@ -749,8 +929,8 @@
static bool validOFI(NSObjectFileImage objectFileImage)
{
- const int ofiCount = sObjectFileImages.size();
- for (int i=0; i < ofiCount; ++i) {
+ const size_t ofiCount = sObjectFileImages.size();
+ for (size_t i=0; i < ofiCount; ++i) {
if ( sObjectFileImages[i] == objectFileImage )
return true;
}
@@ -769,7 +949,7 @@
// and we should delete it
bool linkedImage = dyld::validImage(objectFileImage->image);
if ( ! linkedImage ) {
- delete objectFileImage->image;
+ ImageLoader::deleteImage(objectFileImage->image);
objectFileImage->image = NULL;
}
}
@@ -785,7 +965,16 @@
// 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 ) {
- vm_deallocate(mach_task_self(), (vm_address_t)objectFileImage->imageBaseAddress, objectFileImage->imageLength);
+ 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
@@ -796,13 +985,6 @@
return false;
}
-bool NSHasModInitObjectFileImage(NSObjectFileImage objectFileImage)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
- return objectFileImage->image->needsInitialization();
-}
-
uint32_t NSSymbolDefinitionCountInObjectFileImage(NSObjectFileImage objectFileImage)
{
if ( dyld::gLogAPIs )
@@ -832,7 +1014,7 @@
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->geImportedSymbolInfo(sym);
+ ImageLoader::ReferenceFlags flags = objectFileImage->image->getImportedSymbolInfo(sym);
if ( (flags & ImageLoader::kTentativeDefinition) != 0 )
*tentative_definition = true;
else
@@ -863,32 +1045,8 @@
{
if ( dyld::gLogAPIs )
dyld::log("%s(%p,%s)\n", __func__, objectFileImage, symbolName);
- const ImageLoader::Symbol* sym = objectFileImage->image->findExportedSymbol(symbolName, NULL, true, NULL);
+ const ImageLoader::Symbol* sym = objectFileImage->image->findExportedSymbol(symbolName, true, NULL);
return ( sym != NULL );
-}
-
-/*
- * Given an imageOffset into an ObjectFileImage, returns
- * the segment/section name and offset into that section of
- * that imageOffset. Returns FALSE if the imageOffset is not
- * in any section. You can used the resulting sectionOffset to
- * index into the data returned by NSGetSectionDataInObjectFileImage.
- *
- * First appeared in Mac OS X 10.3
- *
- * SPI: currently only used by ZeroLink to detect +load methods
- */
-bool
-NSFindSectionAndOffsetInObjectFileImage(NSObjectFileImage objectFileImage,
- unsigned long imageOffset,
- const char** segmentName, /* can be NULL */
- const char** sectionName, /* can be NULL */
- unsigned long* sectionOffset) /* can be NULL */
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
-
- return objectFileImage->image->findSection(((char*)(objectFileImage->image->machHeader()))+imageOffset, segmentName, sectionName, sectionOffset);
}
@@ -900,28 +1058,26 @@
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
-#if 0
- dyld::warn("%s(0x%08X, \"%s\", 0x%08X) called more than once for 0x%08X\n",
- __func__, objectFileImage, moduleName, options, objectFileImage);
-#endif
objectFileImage->image = dyld::cloneImage(objectFileImage->image);
}
- // if this ofi was made with NSCreateObjectFileImageFromFile() then physical path is already set
- // if this ofi was create with NSCreateObjectFileImageFromMemory() then the phyiscal path should be set if supplied
- if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 ) {
- if ( objectFileImage->imageBaseAddress != NULL ) {
- const char* physEnd = &moduleName[strlen(moduleName)+1];
- objectFileImage->image->setPath(physEnd);
- }
- }
-
- // set moduleName as the name anyone calling _dyld_get_image_name() will see
- objectFileImage->image->setLogicalPath(moduleName);
+ // 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 )
@@ -931,14 +1087,14 @@
bool forceLazysBound = ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 );
// load libraries, rebase, bind, to make this image usable
- dyld::link(objectFileImage->image, forceLazysBound, ImageLoader::RPathChain(NULL,NULL));
+ 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);
-
- // bump reference count to keep this bundle from being garbage collected
- objectFileImage->image->incrementDlopenReferenceCount();
return ImageLoaderToNSModule(objectFileImage->image);
}
@@ -965,15 +1121,9 @@
ImageLoader* image = NULL;
dyld::clearErrorMessage();
try {
- const char* imageName = moduleName;
- if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 )
- imageName = &moduleName[strlen(moduleName)+1];
-
+ const char* imageName = moduleName;
image = dyld::loadFromMemory((const uint8_t*)object_addr, object_size, imageName);
- if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 )
- image->setLogicalPath(moduleName);
-
if ( image != NULL ) {
// support private bundles
if ( (options & NSLINKMODULE_OPTION_PRIVATE) != 0 )
@@ -983,7 +1133,7 @@
bool forceLazysBound = ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 );
// load libraries, rebase, bind, to make this image usable
- dyld::link(image, forceLazysBound, ImageLoader::RPathChain(NULL,NULL));
+ 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 )
@@ -998,7 +1148,7 @@
// if image was created for this bundle, destroy it
if ( image != NULL ) {
dyld::removeImage(image);
- delete image;
+ ImageLoader::deleteImage(image);
}
image = NULL;
free((void*)msg);
@@ -1014,7 +1164,7 @@
ImageLoader* image = NSModuleToImageLoader(module);
if ( image == NULL )
return NULL;
- return SymbolToNSSymbol(image->findExportedSymbol(symbolName, NULL, false, NULL));
+ return SymbolToNSSymbol(image->findExportedSymbol(symbolName, false, NULL));
}
const char* NSNameOfModule(NSModule module)
@@ -1046,6 +1196,19 @@
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 )
@@ -1055,15 +1218,15 @@
// 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 int ofiCount = sObjectFileImages.size();
+ const size_t ofiCount = sObjectFileImages.size();
bool found = false;
- for (int i=0; i < ofiCount; ++i) {
+ for (size_t i=0; i < ofiCount; ++i) {
NSObjectFileImage ofi = sObjectFileImages[i];
if ( ofi->image == image )
found = true;
}
if ( !found )
- delete image;
+ ImageLoader::deleteImage(image);
return true;
}
@@ -1078,43 +1241,7 @@
// no support for multiple or linkedit handlers
}
-const struct mach_header * _dyld_get_image_header_containing_address(const void* address)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
- 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
-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
-}
+
void NSLinkEditError(NSLinkEditErrors* c, int* errorNumber, const char** fileName, const char** errorString)
@@ -1126,6 +1253,8 @@
*errorString = dyld::getErrorMessage();
}
+
+
static void _dyld_register_binding_handler(void * (*bindingHandler)(const char *, const char *, void *), ImageLoader::BindingOptions bindingOptions)
{
if ( dyld::gLogAPIs )
@@ -1134,9 +1263,11 @@
dyld::gLinkContext.bindingOptions = bindingOptions;
}
+#endif //DEPRECATED_APIS_SUPPORTED
+
// Call by fork() in libSystem after the kernel trap is done on the child side
-static void _dyld_fork_child()
+void _dyld_fork_child()
{
if ( dyld::gLogAPIs )
dyld::log("%s()\n", __func__);
@@ -1149,32 +1280,17 @@
//
extern mach_port_t mach_task_self_;
mach_task_self_ = task_self_trap();
-}
-
-
-
-typedef void (*MonitorProc)(char *lowpc, char *highpc);
-
-static void monInitCallback(ImageLoader* image, void* userData)
-{
- MonitorProc proc = (MonitorProc)userData;
- void* start;
- size_t length;
- if ( image->getSectionContent("__TEXT", "__text", &start, &length) ) {
- proc((char*)start, (char*)start+length);
- }
-}
-
-//
-// _dyld_moninit is called from profiling runtime routine moninit().
-// dyld calls back with the range of each __TEXT/__text section in every
-// linked image.
-//
-void _dyld_moninit(MonitorProc proc)
-{
- dyld::forEachImageDo(&monInitCallback, (void*)proc);
-}
-
+
+ // 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()
{
@@ -1205,15 +1321,15 @@
return false;
}
-
-
-bool lookupDyldFunction(const char* name, uintptr_t* address)
+#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 = (uintptr_t)p->implementation;
+ *address = p->implementation;
return true;
}
}
@@ -1221,57 +1337,18 @@
return false;
}
-static bool readOnlyBootVolume()
-{
- struct statfs sfs;
- if ( statfs("/", &sfs) == 0 ) {
- return ( sfs.f_flags & MNT_RDONLY );
- }
- // if statfs() fails, something is wrong, so don't rebuild dyld cache
- return true;
-}
-
static void registerThreadHelpers(const dyld::LibSystemHelpers* helpers)
{
dyld::gLibSystemHelpers = helpers;
-#if DYLD_SHARED_CACHE_SUPPORT
- // notify dyld server if something is wrong with the shared cache
- //dyld::log("helpers->version=%lu, gSharedCacheDontNotify=%d, gSharedCacheNotFound=%d, gSharedCacheNeedsUpdating=%d, readOnlyBootVolume()=%d\n",
- // helpers->version, dyld::gSharedCacheDontNotify, dyld::gSharedCacheNotFound, dyld::gSharedCacheNeedsUpdating, readOnlyBootVolume());
- if ( (helpers != NULL) && (helpers->version >= 3) && !dyld::gSharedCacheDontNotify ) {
- if ( dyld::gSharedCacheNotFound || dyld::gSharedCacheNeedsUpdating ) {
- if ( ! readOnlyBootVolume() ) {
- if ( dyld::gSharedCacheNotFound )
- (*helpers->dyld_shared_cache_missing)();
- else if ( dyld::imMemorySharedCacheHeader() == NULL ) {
- // since shared cache is not mapped and not missing, it must be
- // corrupt. Don't need to test contents, just
- // ping launchd to start update_dyld_shared_cache
- // rdar://problem/5694507
- (*helpers->dyld_shared_cache_out_of_date)();
- }
- else if ( dyld::gSharedCacheNeedsUpdating ) {
- // To reduce the storm of messages to update_dyld_shared_cache
- // don't message if the cache file is missing (which means the cache is in
- // the process of being regenerated) or if the contents of the cache file
- // don't match what is already in memory (which means the cache has
- // already be regenerated).
- int fd = dyld::openSharedCacheFile();
- if ( fd != -1 ) {
- uint8_t onDiskCache[4096];
- if ( ::read(fd, onDiskCache, 4096) == 4096 ) {
- if ( ::memcmp(onDiskCache, dyld::imMemorySharedCacheHeader(), 4096) == 0 ) {
- // ping launchd to start update_dyld_shared_cache
- (*helpers->dyld_shared_cache_out_of_date)();
- }
- }
- ::close(fd);
- }
- }
- }
- }
+#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
}
@@ -1280,6 +1357,13 @@
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';
@@ -1298,17 +1382,62 @@
}
-bool dlopen_preflight(const char* path)
+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 {
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
// for dlopen, use rpath from caller image and from main executable
if ( callerImage != NULL )
@@ -1321,19 +1450,21 @@
ImageLoader* image = NULL;
dyld::LoadContext context;
context.useSearchPaths = true;
- context.useLdLibraryPath= (strchr(path, '/') == NULL); // a leafname implies should search
- context.implicitRPath = (path[0] != '/'); // a non-absolute path implies try rpath searching
+ 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.findDLL = 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
-
- image = load(path, context);
+
+ unsigned cacheIndex;
+ image = load(path, context, cacheIndex);
if ( image != NULL ) {
- dyld::preflight(image, callersRPaths); // image object deleted by dyld::preflight()
+ dyld::preflight(image, callersRPaths, cacheIndex); // image object deleted by dyld::preflight()
result = true;
}
}
@@ -1348,17 +1479,46 @@
const char* str = *it;
free((void*)str);
}
+ CRSetCrashLogMessage(NULL);
return result;
}
-
-void* dlopen(const char* path, int mode)
+#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
@@ -1372,36 +1532,83 @@
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 {
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
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);
+ 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.useLdLibraryPath= (strchr(path, '/') == NULL); // a leafname implies should search
- context.implicitRPath = (path[0] != '/'); // a non-absolute path implies try rpath searching
+ 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.findDLL = ( (mode & RTLD_DLL) != 0 );
+ context.canBePIE = true;
context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
context.rpath = &callersRPaths; // rpaths from caller and main executable
-
- image = load(path, context);
+
+ 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
@@ -1410,8 +1617,13 @@
if ( (mode & RTLD_NOLOAD) == 0 ) {
bool alreadyLinked = image->isLinked();
bool forceLazysBound = ( (mode & RTLD_NOW) != 0 );
- dyld::link(image, forceLazysBound, callersRPaths);
- if ( ! alreadyLinked ) {
+ 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);
@@ -1428,6 +1640,7 @@
// release global dyld lock early, this enables initializers to do threaded operations
if ( lockHeld ) {
+ CRSetCrashLogMessage(NULL);
dyld::gLibSystemHelpers->releaseGlobalDyldLock();
lockHeld = false;
}
@@ -1455,9 +1668,12 @@
// load() succeeded but, link() failed
// back down reference count and do GC
image->decrementDlopenReferenceCount();
- dyld::garbageCollectImages();
+ 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
@@ -1469,12 +1685,19 @@
free((void*)str);
}
- if ( lockHeld )
+ // 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)
{
@@ -1486,7 +1709,14 @@
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();
@@ -1496,7 +1726,8 @@
return -1;
}
// remove image if reference count went to zero
- dyld::garbageCollectImages();
+ if ( image->dlopenCount() == 0 )
+ dyld::garbageCollectImages();
return 0;
}
else {
@@ -1512,34 +1743,53 @@
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->getLogicalPath();
- info->dli_fbase = (void*)image->machHeader();
- // find closest exported symbol in the image
- const uint32_t exportCount = image->getExportedSymbolCount();
- const ImageLoader::Symbol* bestSym = NULL;
- const void* bestAddr = 0;
- for(uint32_t i=0; i < exportCount; ++i) {
- const ImageLoader::Symbol* sym = image->getIndexedExportedSymbol(i);
- const void* symAddr = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
- if ( (symAddr <= address) && (bestAddr < symAddr) ) {
- bestSym = sym;
- bestAddr = symAddr;
- }
- }
- if ( bestSym != NULL ) {
- info->dli_sname = image->getExportedSymbolName(bestSym);
+ 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
- info->dli_saddr = (void*)bestAddr;
- }
- else {
- info->dli_sname = NULL;
- info->dli_saddr = NULL;
- }
+ //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
}
@@ -1550,6 +1800,12 @@
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
@@ -1560,15 +1816,26 @@
return NULL;
}
-void* dlsym(void* handle, const char* symbolName)
+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
@@ -1579,63 +1846,201 @@
// magic "search all" handle
if ( handle == RTLD_DEFAULT ) {
if ( dyld::flatFindExportedSymbol(underscoredName, &sym, &image) ) {
- return (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ 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
- if ( handle == RTLD_MAIN_ONLY ) {
+ else if ( handle == RTLD_MAIN_ONLY ) {
image = dyld::mainExecutable();
- sym = image->findExportedSymbol(underscoredName, NULL, true, &image); // search RTLD_FIRST way
+ sym = image->findExportedSymbol(underscoredName, true, &image); // search RTLD_FIRST way
if ( sym != NULL ) {
- return (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ 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
- if ( handle == RTLD_NEXT ) {
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
+ 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 ) {
- return (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ 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
- if ( handle == RTLD_SELF ) {
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
+ 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 ) {
- return (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ 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, NULL, true, &image); // search RTLD_FIRST way
+ 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 ) {
- return (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ 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);
@@ -1644,98 +2049,225 @@
else {
dlerrorSet("invalid handle passed to dlsym()");
}
+ CRSetCrashLogMessage(NULL);
+ if ( dyld::gLogAPIs )
+ dyld::log(" %s(%p, %s) ==> NULL\n", __func__, handle, symbolName);
return NULL;
}
-
-
-void* dlord(void* handle, uint32_t ordinal)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%p, %u)\n", __func__, handle, ordinal);
-
- dlerrorClear();
-
+// 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);
- // magic "search all" handle
- if ( handle == RTLD_DEFAULT ) {
- const char* str = dyld::mkstringf("dlord(RTLD_DEFAULT, %u): not supported", ordinal);
- dlerrorSet(str);
- free((void*)str);
- return NULL;
- }
- // magic "search only main executable" handle
- if ( handle == RTLD_MAIN_ONLY ) {
- const char* str = dyld::mkstringf("dlord(RTLD_MAIN_ONLY, %u): not supported", ordinal);
- dlerrorSet(str);
- free((void*)str);
- return NULL;
- }
- // magic "search what I would see" handle
- if ( handle == RTLD_NEXT ) {
- const char* str = dyld::mkstringf("dlord(RTLD_NEXT, %u): not supported", ordinal);
- dlerrorSet(str);
- free((void*)str);
- return NULL;
- }
- // magic "search me, then what I would see" handle
- if ( handle == RTLD_SELF ) {
- const char* str = dyld::mkstringf("dlord(RTLD_SELF, %u): not supported", ordinal);
- dlerrorSet(str);
- free((void*)str);
- return NULL;
- }
+#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));
- // real handle
- const ImageLoader* image = (ImageLoader*)(((uintptr_t)handle) & (-4)); // clear mode bits
- if ( dyld::validImage(image) ) {
- const ImageLoader::Symbol* sym;
- sym = image->getIndexedExportedSymbol(ordinal-1); // map ordinals to mach-o zero based index
-
- if ( sym != NULL ) {
- return (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
- }
- const char* str = dyld::mkstringf("dlord(%p, %u): ordinal not found", handle, ordinal);
- dlerrorSet(str);
- free((void*)str);
- }
- else {
- dlerrorSet("invalid handle passed to dlord()");
- }
- return NULL;
-}
-
-
-
-
-
-
-
-
-
-
-static const struct dyld_all_image_infos* _dyld_get_all_image_infos()
-{
- return &dyld_all_image_infos;
-}
-
-
-
-void dyld_register_image_state_change_handler(dyld_image_states state, bool batch,
- dyld_image_state_change_handler handler)
-{
- if ( dyld::gLogAPIs )
- dyld::log("%s(%d, %d, %p)\n", __func__, state, batch, handler);
- if ( batch )
- dyld::registerImageStateBatchChangeHandler(state, handler);
- else
- dyld::registerImageStateSingleChangeHandler(state, handler);
-}
-
-
-
-
-
-
-
-
+ // 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);
+}
+
+