Loading...
--- dyld/dyld-635.2/src/dyldAPIs.cpp
+++ dyld/dyld-45.3/src/dyldAPIs.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2009 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -27,134 +27,58 @@
//
//
-#define __STDC_LIMIT_MACROS
+
#include <stddef.h>
-#include <stdint.h>
+#include <stdio.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"
+
+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_gdb.h"
#include "mach-o/dyld.h"
#include "mach-o/dyld_priv.h"
+#include "dlfcn.h"
#include "ImageLoader.h"
-#include "ImageLoaderMachO.h"
#include "dyld.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
-
-#ifndef CPU_SUBTYPE_ARM64_E
- #define CPU_SUBTYPE_ARM64_E 2
-#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 __IPHONE_OS_VERSION_MIN_REQUIRED
- #define DEPRECATED_APIS_SUPPORTED 0
-#else
- #define DEPRECATED_APIS_SUPPORTED 1
-#endif
-
-static bool sDynamicInterposing = false;
-
-#if DEPRECATED_APIS_SUPPORTED
+#include "dyldLibSystemThreadHelpers.h"
+
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__)
+#define OLD_LIBSYSTEM_SUPPORT 1
+
// The following functions have no prototype in any header. They are special cases
// where _dyld_func_lookup() is used directly.
+static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit);
+static NSModule _dyld_link_module(NSObjectFileImage object_addr, size_t object_size, const char* moduleName, uint32_t options);
+static void _dyld_register_binding_handler(void * (*)(const char *, const char *, void *), ImageLoader::BindingOptions);
+static void _dyld_fork_prepare();
+static void _dyld_fork_parent();
+static void _dyld_fork_child();
+static void _dyld_fork_child_final();
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_mod_term_funcs();
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::ThreadingHelpers*);
+static void _dyld_update_prebinding(int pathCount, const char* paths[], uint32_t flags);
+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()
{
@@ -167,59 +91,38 @@
};
static 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__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_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 },
-
- // deprecated
-#if DEPRECATED_APIS_SUPPORTED
+ {"__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_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_objc", (void*)unimplemented },
{"__dyld_lookup_and_bind_fully", (void*)_dyld_lookup_and_bind_fully },
{"__dyld_install_handlers", (void*)_dyld_install_handlers },
{"__dyld_link_edit_error", (void*)NSLinkEditError },
+#if OLD_LIBSYSTEM_SUPPORT
+ {"__dyld_link_module", (void*)_dyld_link_module },
+#endif
{"__dyld_unlink_module", (void*)NSUnLinkModule },
+ {"__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_register_func_for_link_module", (void*)unimplemented },
+ {"__dyld_register_func_for_unlink_module", (void*)unimplemented },
+ {"__dyld_register_func_for_replace_module", (void*)unimplemented },
+ {"__dyld_get_objc_module_sect_for_module", (void*)unimplemented },
+ {"__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_register_binding_handler", (void*)_dyld_register_binding_handler },
+ {"__dyld_get_image_header_containing_address", (void*)_dyld_get_image_header_containing_address },
+ {"__dyld_moninit", (void*)_dyld_moninit },
+ {"__dyld_register_binding_handler", (void*)_dyld_register_binding_handler },
+ {"__dyld_fork_prepare", (void*)_dyld_fork_prepare },
+ {"__dyld_fork_parent", (void*)_dyld_fork_parent },
+ {"__dyld_fork_child", (void*)_dyld_fork_child },
+ {"__dyld_fork_child_final", (void*)_dyld_fork_child_final },
+ {"__dyld_fork_mach_init", (void*)unimplemented },
+ {"__dyld_make_delayed_module_initializer_calls",(void*)_dyld_make_delayed_module_initializer_calls },
{"__dyld_NSNameOfSymbol", (void*)NSNameOfSymbol },
{"__dyld_NSAddressOfSymbol", (void*)NSAddressOfSymbol },
{"__dyld_NSModuleForSymbol", (void*)NSModuleForSymbol },
@@ -236,36 +139,37 @@
{"__dyld_NSAddLibrary", (void*)NSAddLibrary },
{"__dyld_NSAddLibraryWithSearching", (void*)NSAddLibraryWithSearching },
{"__dyld_NSAddImage", (void*)NSAddImage },
+ {"__dyld__NSGetExecutablePath", (void*)_NSGetExecutablePath },
{"__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_mod_term_funcs", (void*)_dyld_mod_term_funcs },
+ {"__dyld_install_link_edit_symbol_handlers", (void*)dyld::registerZeroLinkHandlers },
{"__dyld_NSCreateObjectFileImageFromFile", (void*)NSCreateObjectFileImageFromFile },
{"__dyld_NSCreateObjectFileImageFromMemory", (void*)NSCreateObjectFileImageFromMemory },
+ {"__dyld_NSCreateCoreFileImageFromFile", (void*)unimplemented },
{"__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 },
-#if OLD_LIBSYSTEM_SUPPORT
- {"__dyld_link_module", (void*)_dyld_link_module },
-#endif
-#endif //DEPRECATED_APIS_SUPPORTED
-
+ {"__dyld_NSFindSectionAndOffsetInObjectFileImage", (void*)NSFindSectionAndOffsetInObjectFileImage },
+ {"__dyld_register_thread_helpers", (void*)registerThreadHelpers },
+ {"__dyld_dladdr", (void*)dladdr },
+ {"__dyld_dlclose", (void*)dlclose },
+ {"__dyld_dlerror", (void*)dlerror },
+ {"__dyld_dlopen", (void*)dlopen },
+ {"__dyld_dlsym", (void*)dlsym },
+ {"__dyld_update_prebinding", (void*)_dyld_update_prebinding },
+ {"__dyld_get_all_image_infos", (void*)_dyld_get_all_image_infos },
{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)
@@ -278,7 +182,7 @@
}
// dyld's abstract type NSModule is implemented as ImageLoader*
-inline NSModule ImageLoaderToNSModule(const ImageLoader* image)
+inline NSModule ImageLoaderToNSModule(ImageLoader* image)
{
return (NSModule)image;
}
@@ -297,10 +201,6 @@
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;
@@ -313,6 +213,13 @@
//
+static void dyldAPIhalt(const char* apiName, const char* errorMsg)
+{
+ fprintf(stderr, "dyld: %s() error\n", apiName);
+ dyld::halt(errorMsg);
+}
+
+
static void setLastError(NSLinkEditErrors code, int errnum, const char* file, const char* message)
{
@@ -323,7 +230,6 @@
sLastErrorNo = errnum;
}
-#endif // DEPRECATED_APIS_SUPPORTED
/*
*_dyld_NSGetExecutablePath is the dyld side of _NSGetExecutablePath which
@@ -338,121 +244,16 @@
int _NSGetExecutablePath(char* buf, uint32_t *bufsize)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(...)\n", __func__);
+ fprintf(stderr, "%s(...)\n", __func__);
const char* exePath = dyld::getExecutablePath();
if(*bufsize < strlen(exePath) + 1){
- *bufsize = (uint32_t)(strlen(exePath) + 1);
+ *bufsize = 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);
-}
-
-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
@@ -466,7 +267,7 @@
static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header)
{
if ( dyld::gLogAPIs )
- dyld::log("__initialize_Cplusplus()\n");
+ fprintf(stderr, "__initialize_Cplusplus()\n");
// for now, do nothing...
}
@@ -475,15 +276,15 @@
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);
+ fprintf(stderr, "%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) ) {
+ if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
try {
- image->bindAllLazyPointers(dyld::gLinkContext, true);
+ dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
if ( address != NULL)
- *address = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ *address = (void*)image->getExportedSymbolAddress(sym);
if ( module != NULL)
*module = ImageLoaderToNSModule(image);
}
@@ -505,12 +306,12 @@
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;
+ fprintf(stderr, "_dyld_lookup_and_bind(\"%s\", %p, %p)\n", symbolName, address, module);
+ ImageLoader* image;
const ImageLoader::Symbol* sym;
if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
if ( address != NULL)
- *address = (void*)image->getExportedSymbolAddress(sym, dyld::gLinkContext);
+ *address = (void*)image->getExportedSymbolAddress(sym);
if ( module != NULL)
*module = ImageLoaderToNSModule(image);
}
@@ -526,14 +327,14 @@
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;
+ fprintf(stderr, "%s(\"%s\", \"%s\", %p, %p)\n", __func__, symbolName, library_name_hint, address, module);
+ 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);
+ *address = (void*)image->getExportedSymbolAddress(sym);
if ( module != NULL)
*module = ImageLoaderToNSModule(image);
}
@@ -550,8 +351,8 @@
NSSymbol NSLookupAndBindSymbol(const char *symbolName)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\")\n", __func__, symbolName);
- const ImageLoader* image;
+ fprintf(stderr, "%s(\"%s\")\n", __func__, symbolName);
+ ImageLoader* image;
const ImageLoader::Symbol* sym;
if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
return SymbolToNSSymbol(sym);
@@ -563,8 +364,8 @@
NSSymbol NSLookupAndBindSymbolWithHint(const char* symbolName, const char* libraryNameHint)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
- const ImageLoader* image;
+ fprintf(stderr, "%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
+ ImageLoader* image;
const ImageLoader::Symbol* sym;
bool found = dyld::flatFindExportedSymbolWithHint(symbolName, libraryNameHint, &sym, &image);
if ( ! found ) {
@@ -576,55 +377,56 @@
// return NULL on failure and log
if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\") => NULL \n", __func__, symbolName, libraryNameHint);
+ fprintf(stderr, "%s(\"%s\", \"%s\") => NULL \n", __func__, symbolName, libraryNameHint);
return NULL;
}
-
+uint32_t _dyld_image_count(void)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+ return dyld::getImageCount();
+}
+
+const struct mach_header* _dyld_get_image_header(uint32_t image_index)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%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))
-const struct mach_header* addImage(void* callerAddress, const char* path, bool search, bool dontLoad, bool matchInstallName, bool abortOnError)
+const struct mach_header* addImage(const char* path, bool search, bool dontLoad, bool matchInstallName, bool abortOnError)
{
ImageLoader* image = NULL;
- std::vector<const char*> rpathsFromCallerImage;
try {
dyld::clearErrorMessage();
+ void* callerAddress = __builtin_return_address(2); // note layers: 2: real client, 1: libSystem glue, 0: dyld API
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.enforceIOSMac = 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);
+ context.rpath = NULL; // support not yet implemented
+
+ image = load(path, context);
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();
+ dyld::link(image, ImageLoader::kNonLazyOnly, ImageLoader::kRunInitializers);
+ return image->machHeader();
}
}
catch (const char* msg) {
- dyld::garbageCollectImages();
if ( abortOnError) {
char pathMsg[strlen(msg)+strlen(path)+4];
strcpy(pathMsg, msg);
@@ -634,47 +436,33 @@
}
// 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();
-}
-
+ }
+ return NULL;
+}
const struct mach_header* NSAddImage(const char* path, uint32_t options)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", 0x%08X)\n", __func__, path, options);
+ fprintf(stderr, "%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);
+ const bool abortOnError = ( (options & NSADDIMAGE_OPTION_RETURN_ON_ERROR) == 0 );
+ return addImage(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);
+ fprintf(stderr, "%s(\"%s\")\n", __func__, path);
+ return (addImage(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);
+ fprintf(stderr, "%s(\"%s\")\n", __func__, path);
+ return (addImage(path, true, false, false, false) != NULL);
}
@@ -686,31 +474,29 @@
bool NSIsSymbolNameDefinedInImage(const struct mach_header* mh, const char* symbolName)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\")\n", __func__, (void *)mh, symbolName);
+ fprintf(stderr, "%s(%p, \"%s\")\n", __func__, (void *)mh, symbolName);
ImageLoader* image = dyld::findImageByMachHeader(mh);
if ( image != NULL ) {
- if ( image->findExportedSymbol(symbolName, true, NULL) != NULL)
+ if ( image->findExportedSymbol(symbolName, NULL, 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);
+ fprintf(stderr, "%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);
+ dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
}
else if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW ) {
- image->bindAllLazyPointers(dyld::gLinkContext, false);
+ dyld::link(image, ImageLoader::kLazyOnlyNoDependents, ImageLoader::kDontRunInitializers);
}
}
catch (const char* msg) {
@@ -718,10 +504,10 @@
dyldAPIhalt(__func__, msg);
}
}
- symbol = image->findExportedSymbol(symbolToFind, true, NULL);
+ symbol = image->findExportedSymbol(symbolName, NULL, true, NULL);
}
if ( dyld::gLogAPIs && (symbol == NULL) )
- dyld::log("%s(%p, \"%s\", 0x%08X) ==> NULL\n", __func__, mh, symbolName, options);
+ fprintf(stderr, "%s(%p, \"%s\", 0x%08X) ==> NULL\n", __func__, mh, symbolName, options);
return SymbolToNSSymbol(symbol);
}
@@ -731,8 +517,8 @@
static bool client_NSIsSymbolNameDefined(const char* symbolName)
{
if ( dyld::gLogAPIs )
- dyld::log("NSIsSymbolNameDefined(\"%s\")\n", symbolName);
- const ImageLoader* image;
+ fprintf(stderr, "NSIsSymbolNameDefined(\"%s\")\n", symbolName);
+ ImageLoader* image;
const ImageLoader::Symbol* sym;
return dyld::flatFindExportedSymbol(symbolName, &sym, &image);
}
@@ -740,8 +526,8 @@
bool NSIsSymbolNameDefinedWithHint(const char* symbolName, const char* libraryNameHint)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
- const ImageLoader* image;
+ fprintf(stderr, "%s(\"%s\", \"%s\")\n", __func__, symbolName, libraryNameHint);
+ ImageLoader* image;
const ImageLoader::Symbol* sym;
bool found = dyld::flatFindExportedSymbolWithHint(symbolName, libraryNameHint, &sym, &image);
if ( ! found ) {
@@ -749,16 +535,16 @@
found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
}
if ( !found && dyld::gLogAPIs )
- dyld::log("%s(\"%s\", \"%s\") => false \n", __func__, symbolName, libraryNameHint);
+ fprintf(stderr, "%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);
+ fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
const char* result = NULL;
- ImageLoader* image = dyld::findImageContainingSymbol(symbol);
+ ImageLoader* image = dyld::findImageContainingAddress(symbol);
if ( image != NULL )
result = image->getExportedSymbolName(NSSymbolToSymbol(symbol));
return result;
@@ -767,47 +553,74 @@
void* NSAddressOfSymbol(NSSymbol symbol)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)symbol);
- if ( symbol == NULL )
- return NULL;
+ fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
void* result = NULL;
- ImageLoader* image = dyld::findImageContainingSymbol(symbol);
+ ImageLoader* image = dyld::findImageContainingAddress(symbol);
if ( image != NULL )
- result = (void*)image->getExportedSymbolAddress(NSSymbolToSymbol(symbol), dyld::gLinkContext);
+ result = (void*)image->getExportedSymbolAddress(NSSymbolToSymbol(symbol));
return result;
}
NSModule NSModuleForSymbol(NSSymbol symbol)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, (void *)symbol);
+ fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
NSModule result = NULL;
- ImageLoader* image = dyld::findImageContainingSymbol(symbol);
+ ImageLoader* image = dyld::findImageContainingAddress(symbol);
if ( image != NULL )
result = ImageLoaderToNSModule(image);
return result;
}
+intptr_t _dyld_get_image_vmaddr_slide(uint32_t image_index)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%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 )
+ fprintf(stderr, "%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;
-}
+ fprintf(stderr, "%s()\n", __func__);
+ return FALSE; // fixme
+}
+
+void _dyld_bind_objc_module(const void *objc_module)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s(%p)\n", __func__, objc_module);
+ // do nothing, with new dyld everything already bound
+}
+
bool _dyld_bind_fully_image_containing_address(const void* address)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
- address = stripPointer(address);
+ fprintf(stderr, "%s(%p)\n", __func__, address);
dyld::clearErrorMessage();
ImageLoader* image = dyld::findImageContainingAddress(address);
if ( image != NULL ) {
try {
- image->bindAllLazyPointers(dyld::gLinkContext, true);
+ dyld::link(image, ImageLoader::kLazyAndNonLazy, ImageLoader::kDontRunInitializers);
return true;
}
catch (const char* msg) {
@@ -820,7 +633,7 @@
bool _dyld_image_containing_address(const void* address)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, address);
+ fprintf(stderr, "%s(%p)\n", __func__, address);
ImageLoader *imageLoader = dyld::findImageContainingAddress(address);
return (NULL != imageLoader);
}
@@ -838,27 +651,22 @@
NSObjectFileImageReturnCode NSCreateObjectFileImageFromFile(const char* pathName, NSObjectFileImage *objectFileImage)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(\"%s\", ...)\n", __func__, pathName);
+ fprintf(stderr, "%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.enforceIOSMac = 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);
+ ImageLoader* image = dyld::load(pathName, context);
// Note: We DO NOT link the image! NSLinkModule will do that
if ( image != NULL ) {
if ( !image->isBundle() ) {
@@ -870,9 +678,7 @@
}
}
catch (const char* msg) {
- //dyld::log("dyld: NSCreateObjectFileImageFromFile() error: %s\n", msg);
- dyld::garbageCollectImages();
- free((void*)msg);
+ //fprintf(stderr, "dyld: NSCreateObjectFileImageFromFile() error: %s\n", msg);
return NSObjectFileImageInappropriateFile;
}
return NSObjectFileImageFailure;
@@ -882,13 +688,13 @@
NSObjectFileImageReturnCode NSCreateObjectFileImageFromMemory(const void* address, size_t size, NSObjectFileImage *objectFileImage)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p, %lu, %p)\n", __func__, address, size, objectFileImage);
+ fprintf(stderr, "%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();
+ delete image;
return NSObjectFileImageInappropriateFile;
}
// Note: We DO NOT link the image! NSLinkModule will do that
@@ -898,17 +704,15 @@
}
}
catch (const char* msg) {
- free((void*)msg);
- dyld::garbageCollectImages();
- //dyld::log("dyld: NSCreateObjectFileImageFromMemory() error: %s\n", msg);
+ fprintf(stderr, "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) {
+ const int ofiCount = sObjectFileImages.size();
+ for (int i=0; i < ofiCount; ++i) {
if ( sObjectFileImages[i] == objectFileImage )
return true;
}
@@ -918,19 +722,14 @@
bool NSDestroyObjectFileImage(NSObjectFileImage objectFileImage)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
+ fprintf(stderr, "%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;
- }
- }
+ // 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 )
+ delete objectFileImage->image;
// remove from list of ofi's
for (std::vector<NSObjectFileImage>::iterator it=sObjectFileImages.begin(); it != sObjectFileImages.end(); it++) {
@@ -943,16 +742,7 @@
// 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);
+ vm_deallocate(mach_task_self(), (vm_address_t)objectFileImage->imageBaseAddress, objectFileImage->imageLength);
}
// free ofi object
@@ -963,17 +753,24 @@
return false;
}
+bool NSHasModInitObjectFileImage(NSObjectFileImage objectFileImage)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
+ return objectFileImage->image->needsInitialization();
+}
+
uint32_t NSSymbolDefinitionCountInObjectFileImage(NSObjectFileImage objectFileImage)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
+ fprintf(stderr, "%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);
+ fprintf(stderr, "%s(%p,%d)\n", __func__, objectFileImage, ordinal);
const ImageLoader::Symbol* sym = objectFileImage->image->getIndexedExportedSymbol(ordinal);
return objectFileImage->image->getExportedSymbolName(sym);
}
@@ -981,7 +778,7 @@
uint32_t NSSymbolReferenceCountInObjectFileImage(NSObjectFileImage objectFileImage)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, objectFileImage);
+ fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
return objectFileImage->image->getImportedSymbolCount();
}
@@ -989,10 +786,10 @@
bool* tentative_definition)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p,%d)\n", __func__, objectFileImage, ordinal);
+ fprintf(stderr, "%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);
+ ImageLoader::ReferenceFlags flags = objectFileImage->image->geImportedSymbolInfo(sym);
if ( (flags & ImageLoader::kTentativeDefinition) != 0 )
*tentative_definition = true;
else
@@ -1005,7 +802,7 @@
const char* segmentName, const char* sectionName, unsigned long* size)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p,%s, %s)\n", __func__, objectFileImage, segmentName, sectionName);
+ fprintf(stderr, "%s(%p,%s, %s)\n", __func__, objectFileImage, segmentName, sectionName);
void* start;
size_t length;
@@ -1022,100 +819,127 @@
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);
+ fprintf(stderr, "%s(%p,%s)\n", __func__, objectFileImage, symbolName);
+ const ImageLoader::Symbol* sym = objectFileImage->image->findExportedSymbol(symbolName, NULL, 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 )
+ fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
+
+ return objectFileImage->image->findSection((char*)(objectFileImage->image->getBaseAddress())+imageOffset, segmentName, sectionName, sectionOffset);
+}
+
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);
+ fprintf(stderr, "%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
+#if 0
+ fprintf(stderr, "dyld: warning: %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);
}
- // 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);
- }
+ // 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);
// support private bundles
if ( (options & NSLINKMODULE_OPTION_PRIVATE) != 0 )
objectFileImage->image->setHideExports();
// set up linking options
- bool forceLazysBound = ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 );
+ ImageLoader::BindingLaziness bindness = ImageLoader::kNonLazyOnly;
+ if ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 )
+ bindness = ImageLoader::kLazyAndNonLazy;
+ ImageLoader::InitializerRunning runInitializers = ImageLoader::kRunInitializers;
+ if ( (options & NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES) != 0 )
+ runInitializers = ImageLoader::kDontRunInitializersButTellObjc;
// load libraries, rebase, bind, to make this image usable
- dyld::link(objectFileImage->image, forceLazysBound, false, ImageLoader::RPathChain(NULL,NULL), UINT32_MAX);
+ dyld::link(objectFileImage->image, bindness, runInitializers);
- // 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
+ dyld::removeImage(objectFileImage->image);
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
+ fprintf(stderr, "%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;
+ const char* imageName = moduleName;
+ if ( (options & NSLINKMODULE_OPTION_TRAILING_PHYS_NAME) != 0 )
+ imageName = &moduleName[strlen(moduleName)+1];
+
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 )
image->setHideExports();
// set up linking options
- bool forceLazysBound = ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 );
+ ImageLoader::BindingLaziness bindness = ImageLoader::kNonLazyOnly;
+ if ( (options & NSLINKMODULE_OPTION_BINDNOW) != 0 )
+ bindness = ImageLoader::kLazyAndNonLazy;
+ ImageLoader::InitializerRunning runInitializers = ImageLoader::kRunInitializers;
+ if ( (options & NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES) != 0 )
+ runInitializers = ImageLoader::kDontRunInitializersButTellObjc;
// 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);
+ dyld::link(image, bindness, runInitializers);
}
}
catch (const char* msg) {
@@ -1126,10 +950,9 @@
// if image was created for this bundle, destroy it
if ( image != NULL ) {
dyld::removeImage(image);
- ImageLoader::deleteImage(image);
+ delete image;
}
image = NULL;
- free((void*)msg);
}
return ImageLoaderToNSModule(image);
}
@@ -1138,17 +961,17 @@
NSSymbol NSLookupSymbolInModule(NSModule module, const char* symbolName)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p, \"%s\")\n", __func__, (void *)module, symbolName);
+ fprintf(stderr, "%s(%p, \"%s\")\n", __func__, (void *)module, symbolName);
ImageLoader* image = NSModuleToImageLoader(module);
if ( image == NULL )
return NULL;
- return SymbolToNSSymbol(image->findExportedSymbol(symbolName, false, NULL));
+ return SymbolToNSSymbol(image->findExportedSymbol(symbolName, NULL, false, NULL));
}
const char* NSNameOfModule(NSModule module)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, module);
+ fprintf(stderr, "%s(%p)\n", __func__, module);
ImageLoader* image = NSModuleToImageLoader(module);
if ( image == NULL )
return NULL;
@@ -1158,7 +981,7 @@
const char* NSLibraryNameForModule(NSModule module)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p)\n", __func__, module);
+ fprintf(stderr, "%s(%p)\n", __func__, module);
ImageLoader* image = NSModuleToImageLoader(module);
if ( image == NULL )
return NULL;
@@ -1168,25 +991,12 @@
bool NSUnLinkModule(NSModule module, uint32_t options)
{
if ( dyld::gLogAPIs )
- dyld::log("%s(%p, 0x%08X)\n", __func__, module, options);
+ fprintf(stderr, "%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 )
@@ -1196,15 +1006,15 @@
// 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 size_t ofiCount = sObjectFileImages.size();
+ const int ofiCount = sObjectFileImages.size();
bool found = false;
- for (size_t i=0; i < ofiCount; ++i) {
+ for (int i=0; i < ofiCount; ++i) {
NSObjectFileImage ofi = sObjectFileImages[i];
if ( ofi->image == image )
found = true;
}
if ( !found )
- ImageLoader::deleteImage(image);
+ delete image;
return true;
}
@@ -1213,13 +1023,52 @@
static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit)
{
if ( dyld::gLogAPIs )
- dyld::log("NSLinkEditErrorHandlers()\n");
+ fprintf(stderr, "NSLinkEditErrorHandlers()\n");
dyld::registerUndefinedHandler((dyld::UndefinedHandler)undefined);
// no support for multiple or linkedit handlers
}
-
+const struct mach_header * _dyld_get_image_header_containing_address(const void* address)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%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 )
+ fprintf(stderr, "%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 )
+ fprintf(stderr, "%s(%p)\n", __func__, (void *)func);
+ dyld::registerRemoveCallback(func);
+}
+
+// called by atexit() function installed by crt
+static void _dyld_mod_term_funcs()
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+ dyld::runTerminators();
+}
+
+// called by crt before main
+static void _dyld_make_delayed_module_initializer_calls()
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+ dyld::initializeMainExecutable();
+}
void NSLinkEditError(NSLinkEditErrors* c, int* errorNumber, const char** fileName, const char** errorString)
@@ -1231,24 +1080,33 @@
*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__);
+ fprintf(stderr, "%s()\n", __func__);
dyld::gLinkContext.bindingHandler = bindingHandler;
dyld::gLinkContext.bindingOptions = bindingOptions;
}
-#endif //DEPRECATED_APIS_SUPPORTED
-
+// Call by fork() in libSystem before the kernel trap is done
+static void _dyld_fork_prepare()
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+}
+
+// Call by fork() in libSystem after the kernel trap is done on the parent side
+static void _dyld_fork_parent()
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+}
// 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__);
+static void _dyld_fork_child()
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%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.
@@ -1258,22 +1116,44 @@
//
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
+}
+
+// Call by fork() in libSystem after the kernel trap is done on the child side after
+// other libSystem child side fixups are done
+static void _dyld_fork_child_final()
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+}
+
+
+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);
+}
+
// returns true if prebinding was used in main executable
bool _dyld_launched_prebound()
{
if ( dyld::gLogAPIs )
- dyld::log("%s()\n", __func__);
+ fprintf(stderr, "%s()\n", __func__);
// ¥¥¥Êif we deprecate prebinding, we may want to consider always returning true or false here
return dyld::mainExecutablePrebound();
@@ -1299,15 +1179,15 @@
return false;
}
-#endif // DEPRECATED_APIS_SUPPORTED
-
-int _dyld_func_lookup(const char* name, void** address)
+
+
+bool lookupDyldFunction(const char* name, uintptr_t* 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;
+ fprintf(stderr, "unimplemented dyld function: %s\n", p->name);
+ *address = (uintptr_t)p->implementation;
return true;
}
}
@@ -1316,289 +1196,79 @@
}
-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 registerThreadHelpers(const dyld::ThreadingHelpers* helpers)
+{
+ // We need to make sure libSystem's lazy pointer's are bound
+ // before installing thred helpers.
+ // The reason for this is that if accessing the lock requires
+ // a lazy pointer to be bound (and it does when multi-module
+ // libSystem) is not prebound, the lazy handler will be
+ // invoked which tries to acquire the lock again...an infinite
+ // loop.
+ ImageLoader* image = dyld::findImageContainingAddress(helpers);
+ dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
+
+ dyld::gThreadHelpers = helpers;
}
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);
+ if ( dyld::gThreadHelpers != NULL ) {
+ char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(1);
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);
+ if ( dyld::gThreadHelpers != NULL ) {
+ char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(strlen(msg)+1);
+ strcpy(buffer, msg);
+ }
+}
+
+
+
+void* dlopen(const char* path, int mode)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s(%s, 0x%08X)\n", __func__, path, mode);
dlerrorClear();
- CRSetCrashLogMessage("dyld: in dlopen_preflight()");
-
- const bool leafName = (strchr(path, '/') == NULL);
- const bool absolutePath = (path[0] == '/');
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- 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;
+ // passing NULL for path means return magic object
+ if ( path == NULL ) {
+ return RTLD_DEFAULT;
+ }
- 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 )
- 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.useLdLibraryPath= (strchr(path, '/') == NULL); // a leafname implies should search
context.matchByInstallName = true;
- context.dontLoad = false;
+ context.dontLoad = ( (mode & RTLD_NOLOAD) != 0 );
context.mustBeBundle = false;
context.mustBeDylib = false;
- context.canBePIE = true;
- context.enforceIOSMac = 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);
+ context.rpath = NULL; // support not yet implemented
+
+ image = load(path, context);
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 __IPHONE_OS_VERSION_MIN_REQUIRED
- 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;
- }
- }
+ image->incrementReferenceCount();
+ if ( ! image->isLinked() ) {
+ ImageLoader::BindingLaziness bindiness = ImageLoader::kNonLazyOnly;
+ if ( (mode & RTLD_NOW) != 0 )
+ bindiness = ImageLoader::kLazyAndNonLazy;
+ dyld::link(image, bindiness, ImageLoader::kRunInitializers);
+ // only hide exports if image is not already in use
+ if ( (mode & RTLD_LOCAL) != 0 )
+ image->setHideExports(true);
}
- }
- }
-#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.enforceIOSMac = 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 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:
@@ -1606,97 +1276,34 @@
// 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;
+ return image;
+ }
+ }
+ catch (const char* msg) {
+ const char* format = "dlopen(%s, %d): %s";
+ char temp[strlen(format)+strlen(path)+strlen(msg)+10];
+ sprintf(temp, format, path, mode, msg);
+ dlerrorSet(temp);
+ }
+ return NULL;
+}
+
+int dlclose(void* handle)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s(%p)\n", __func__, handle);
+
+ ImageLoader* image = (ImageLoader*)handle;
+ if ( dyld::validImage(image) ) {
+ if ( image->decrementReferenceCount() ) {
+ // for now, only bundles can be unloaded
+ // to unload dylibs we would need to track all direct and indirect uses
+ if ( image->isBundle() ) {
+ dyld::removeImage(image);
+ delete image;
}
-
- // 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 {
@@ -1710,55 +1317,34 @@
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
+ fprintf(stderr, "%s(%p, %p)\n", __func__, address, info);
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_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);
+ if ( (symAddr <= address) && (bestAddr < symAddr) ) {
+ bestSym = sym;
+ bestAddr = symAddr;
+ }
+ }
+ if ( bestSym != NULL ) {
+ info->dli_sname = image->getExportedSymbolName(bestSym) + 1; // strip off leading underscore
+ info->dli_saddr = (void*)bestAddr;
+ }
+ else {
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
}
@@ -1766,45 +1352,26 @@
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
- }
+ fprintf(stderr, "%s()\n", __func__);
+
+ if ( dyld::gThreadHelpers != NULL ) {
+ char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(1);
+ // if no error set, return NULL
+ if ( buffer[0] != '\0' )
+ return buffer;
}
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()");
+void* dlsym(void* handle, const char* symbolName)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s(%p, %s)\n", __func__, handle, symbolName);
+
dlerrorClear();
- const ImageLoader* image;
+ 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
@@ -1815,413 +1382,261 @@
// 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_ARM64_E) ) {
- 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_ARM64_E) ) {
- 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 (void*)image->getExportedSymbolAddress(sym);
+ }
+ const char* format = "dlsym(RTLD_DEFAULT, %s): symbol not found";
+ char temp[strlen(format)+strlen(symbolName)+2];
+ sprintf(temp, format, symbolName);
+ dlerrorSet(temp);
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
+ if ( handle == RTLD_NEXT ) {
+ void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- sym = callerImage->findExportedSymbolInDependentImages(underscoredName, dyld::gLinkContext, &image); // don't search image, but do search what it links against
+ sym = callerImage->findExportedSymbolInDependentImages(underscoredName, &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_ARM64_E) ) {
- 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 (void*)image->getExportedSymbolAddress(sym);
+ }
+ const char* format = "dlsym(RTLD_NEXT, %s): symbol not found";
+ char temp[strlen(format)+strlen(symbolName)+2];
+ sprintf(temp, format, symbolName);
+ dlerrorSet(temp);
return NULL;
}
+#ifdef RTLD_SELF
// 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
+ if ( handle == RTLD_SELF ) {
+ void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- sym = callerImage->findExportedSymbolInImageOrDependentImages(underscoredName, dyld::gLinkContext, &image); // search image and what it links against
+ sym = callerImage->findExportedSymbolInImageOrDependentImages(underscoredName, &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_ARM64_E) ) {
- 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 (void*)image->getExportedSymbolAddress(sym);
+ }
+ const char* format = "dlsym(RTLD_SELF, %s): symbol not found";
+ char temp[strlen(format)+strlen(symbolName)+2];
+ sprintf(temp, format, symbolName);
+ dlerrorSet(temp);
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
+ image = (ImageLoader*)handle;
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
-
+ sym = image->findExportedSymbolInImageOrDependentImages(underscoredName, &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_ARM64_E) ) {
- 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);
+ return (void*)image->getExportedSymbolAddress(sym);
+ }
+ const char* format = "dlsym(%p, %s): symbol not found";
+ char temp[strlen(format)+strlen(symbolName)+20];
+ sprintf(temp, format, handle, symbolName);
+ dlerrorSet(temp);
}
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);
+
+static void commitRepreboundFiles(std::vector<ImageLoader*> files, bool unmapOld)
+{
+ // tell file system to flush all dirty buffers to disk
+ // after this sync, the _redoprebinding files will be on disk
+ sync();
+
+ // now commit (swap file) for each re-prebound image
+ // this only updates directories, since the files have already been flushed by previous sync()
+ for (std::vector<ImageLoader*>::iterator it=files.begin(); it != files.end(); it++) {
+ (*it)->reprebindCommit(dyld::gLinkContext, true, unmapOld);
+ }
+
+ // tell file system to flush all dirty buffers to disk
+ // this should flush out all directory changes caused by the file swapping
+ sync();
+}
+
+
+#define UPDATE_PREBINDING_DRY_RUN 0x00000001
+#define UPDATE_PREBINDING_PROGRESS 0x00000002
+
+//
+// SPI called only by update_prebinding tool to redo prebinding in all prebound files specified
+// There must be no dylibs loaded when this fnction is called.
+//
+__attribute__((noreturn))
+static void _dyld_update_prebinding(int pathCount, const char* paths[], uint32_t flags)
+{
+ if ( dyld::gLogAPIs )
+ fprintf(stderr, "%s()\n", __func__);
+
+ // list of requested dylibs actually loaded
+ std::vector<ImageLoader*> preboundImages;
-#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 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);
+ try {
+ // verify no dylibs loaded
+ if ( dyld::getImageCount() != 1 )
+ throw "_dyld_update_prebinding cannot be called with dylib already loaded";
+
+ const uint32_t max_allowed_link_errors = 10;
+ uint32_t link_error_count = 0;
+
+ // load and link each dylib
+ for (int i=0; i < pathCount; ++i) {
+ dyld::LoadContext context;
+ context.useSearchPaths = false;
+ context.matchByInstallName = true;
+ context.dontLoad = false;
+ context.mustBeBundle = false;
+ context.mustBeDylib = true;
+ context.origin = NULL; // @loader_path not allowed in prebinding list
+ context.rpath = NULL; // support not yet implemented
+
+ ImageLoader* image = NULL;
+ try {
+ image = dyld::load(paths[i], context);
+ // bind lazy and non-lazy symbols, but don't run initializers
+ // this may bring in other dylibs later in the list or missing from list, but that is ok
+ dyld::link(image, ImageLoader::kLazyAndNonLazy, ImageLoader::kDontRunInitializers);
+ // recored images we successfully loaded
+ preboundImages.push_back(image);
}
- }
- }
- 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);
- *length = (size_t)((mappings[2].address + mappings[2].size) - mappings[0].address);
- 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);
- break;
- }
-#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);
-}
-
-
-
-
+ catch (const char* msg) {
+ if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) ) {
+ const char *stage;
+ if ( image == NULL ) // load exception
+ stage = "load";
+ else // link exception
+ stage = "link";
+ fprintf(stderr, "update_prebinding: warning: could not %s %s: %s\n", stage, paths[i], msg);
+ }
+ if ( image != NULL )
+ link_error_count++;
+ if ( link_error_count > max_allowed_link_errors )
+ throw;
+ }
+ }
+
+ // find missing images
+ uint32_t loadedImageCount = dyld::getImageCount();
+ if ( loadedImageCount > (preboundImages.size()+1) ) {
+ if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
+ fprintf(stderr, "update_prebinding: warning: the following dylibs were loaded but will not have their prebinding updated because they are not in the list of paths to reprebind\n");
+ for (uint32_t i=1; i < loadedImageCount; ++i) {
+ ImageLoader* target = dyld::getIndexedImage(i);
+ bool found = false;
+ for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
+ if ( *it == target ) {
+ found = true;
+ break;
+ }
+ }
+ if ( !found )
+ if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
+ fprintf(stderr, " %s\n", target->getPath());
+ }
+ }
+
+ // warn about unprebound files in the list
+ bool unpreboundWarned = false;
+ for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
+ if ( ! (*it)->isPrebindable() && (*it != dyld::mainExecutable()) ) {
+ if ( ! unpreboundWarned ) {
+ if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
+ fprintf(stderr, "update_prebinding: warning: the following dylibs were specified but were not built prebound\n");
+ unpreboundWarned = true;
+ }
+ if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
+ fprintf(stderr, " %s\n", (*it)->getPath());
+ }
+ }
+
+ if(UPDATE_PREBINDING_DRY_RUN & flags) {
+ fprintf(stderr, "update_prebinding: dry-run: no changes were made to the filesystem.\n");
+ }
+ else {
+ uint32_t imageCount = preboundImages.size();
+ uint32_t imageNumber = 1;
+
+ // on Intel system, update_prebinding is run twice: i386, then emulated ppc
+ // calculate fudge factors so that progress output represents both runs
+ int denomFactor = 1;
+ int numerAddend = 0;
+ if (UPDATE_PREBINDING_PROGRESS & flags) {
+ #if __i386__
+ // i386 half runs first, just double denominator
+ denomFactor = 2;
+ #endif
+ #if __ppc__
+ // if emulated ppc, double denominator and shift numerator
+ int mib[] = { CTL_KERN, KERN_CLASSIC, getpid() };
+ int is_emulated = 0;
+ size_t len = sizeof(int);
+ int ret = sysctl(mib, 3, &is_emulated, &len, NULL, 0);
+ if ((ret != -1) && is_emulated) {
+ denomFactor = 2;
+ numerAddend = imageCount;
+ }
+ #endif
+ }
+
+ // tell each image to write itself out re-prebound
+ struct timeval currentTime = { 0 , 0 };
+ gettimeofday(¤tTime, NULL);
+ time_t timestamp = currentTime.tv_sec;
+ std::vector<ImageLoader*> updatedImages;
+ for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
+ uint64_t freespace = (*it)->reprebind(dyld::gLinkContext, timestamp);
+ updatedImages.push_back(*it);
+ if(UPDATE_PREBINDING_PROGRESS & flags) {
+ fprintf(stdout, "update_prebinding: progress: %3u/%u\n", imageNumber+numerAddend, imageCount*denomFactor);
+ fflush(stdout);
+ imageNumber++;
+ }
+ // see if we are running low on disk space (less than 32MB is "low")
+ const uint64_t kMinFreeSpace = 32*1024*1024;
+ if ( freespace < kMinFreeSpace ) {
+ if ( dyld::gLinkContext.verbosePrebinding || (UPDATE_PREBINDING_DRY_RUN & flags) )
+ fprintf(stderr, "update_prebinding: disk space down to %lluMB, committing %lu prebound files\n", freespace/(1024*1024), updatedImages.size());
+ // commit files processed so far, to free up more disk space
+ commitRepreboundFiles(updatedImages, true);
+ // empty list of temp files
+ updatedImages.clear();
+ }
+ }
+
+ // commit them, don't need to unmap old, cause we are done
+ commitRepreboundFiles(updatedImages, false);
+ }
+ }
+ catch (const char* msg) {
+ // delete temp files
+ try {
+ for (std::vector<ImageLoader*>::iterator it=preboundImages.begin(); it != preboundImages.end(); it++) {
+ (*it)->reprebindCommit(dyld::gLinkContext, false, false);
+ }
+ }
+ catch (const char* commitMsg) {
+ fprintf(stderr, "update_prebinding: error: %s\n", commitMsg);
+ }
+ fprintf(stderr, "update_prebinding: error: %s\n", msg);
+ exit(1);
+ }
+ exit(0);
+}
+
+
+
+static const struct dyld_all_image_infos* _dyld_get_all_image_infos()
+{
+ return &dyld_all_image_infos;
+}
+
+
+
+
+
+
+
+