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--- dyld/dyld-46.12/src/dyldAPIs.cpp
+++ /dev/null
@@ -1,1644 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-//
-// This file implements that API's in <mach-o/dyld.h>
-//
-//
-
-
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#include <mach/mach.h>
-#include <sys/time.h>
-#include <sys/sysctl.h>
-
-extern "C" mach_port_name_t task_self_trap(void); // can't include <System/mach/mach_traps.h> because it is missing extern C
-
-#include "mach-o/dyld_gdb.h"
-#include "mach-o/dyld.h"
-#include "mach-o/dyld_priv.h"
-#include "dlfcn.h"
-
-#include "ImageLoader.h"
-#include "dyld.h"
-#include "dyldLibSystemThreadHelpers.h"
-
-static char sLastErrorFilePath[1024];
-static NSLinkEditErrors sLastErrorFileCode;
-static int sLastErrorNo;
-
-
-// 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 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 _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);
-
-
-static void unimplemented()
-{
- dyld::halt("unimplemented dyld function\n");
-}
-
-struct dyld_func {
- const char* name;
- void* implementation;
-};
-
-static struct dyld_func dyld_funcs[] = {
- {"__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_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 },
- {"__dyld_NSLookupAndBindSymbol", (void*)NSLookupAndBindSymbol },
- {"__dyld_NSLookupAndBindSymbolWithHint", (void*)NSLookupAndBindSymbolWithHint },
- {"__dyld_NSLookupSymbolInModule", (void*)NSLookupSymbolInModule},
- {"__dyld_NSLookupSymbolInImage", (void*)NSLookupSymbolInImage},
- {"__dyld_NSMakePrivateModulePublic", (void*)NSMakePrivateModulePublic},
- {"__dyld_NSIsSymbolNameDefined", (void*)client_NSIsSymbolNameDefined},
- {"__dyld_NSIsSymbolNameDefinedWithHint", (void*)NSIsSymbolNameDefinedWithHint },
- {"__dyld_NSIsSymbolNameDefinedInImage", (void*)NSIsSymbolNameDefinedInImage},
- {"__dyld_NSNameOfModule", (void*)NSNameOfModule },
- {"__dyld_NSLibraryNameForModule", (void*)NSLibraryNameForModule },
- {"__dyld_NSAddLibrary", (void*)NSAddLibrary },
- {"__dyld_NSAddLibraryWithSearching", (void*)NSAddLibraryWithSearching },
- {"__dyld_NSAddImage", (void*)NSAddImage },
- {"__dyld__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 },
- {"__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}
-};
-
-
-
-// dyld's abstract type NSSymbol is implemented as const ImageLoader::Symbol*
-inline NSSymbol SymbolToNSSymbol(const ImageLoader::Symbol* sym)
-{
- return (NSSymbol)sym;
-}
-inline const ImageLoader::Symbol* NSSymbolToSymbol(NSSymbol sym)
-{
- return (const ImageLoader::Symbol*)sym;
-}
-
-// dyld's abstract type NSModule is implemented as ImageLoader*
-inline NSModule ImageLoaderToNSModule(ImageLoader* image)
-{
- return (NSModule)image;
-}
-inline ImageLoader* NSModuleToImageLoader(NSModule module)
-{
- ImageLoader* image = (ImageLoader*)module;
- if ( dyld::validImage(image) )
- return image;
- return NULL;
-}
-
-// actual definition for opaque type
-struct __NSObjectFileImage
-{
- ImageLoader* image;
- const void* imageBaseAddress; // not used with OFI created from files
- size_t imageLength; // not used with OFI created from files
-};
-static std::vector<NSObjectFileImage> sObjectFileImages;
-
-
-
-//
-// __NSObjectFileImage are deleted in NSDestroyObjectFileImage()
-// The contained image is delete in one of two places:
-// NSUnLinkModule deletes the image if there is no __NSObjectFileImage with a reference to it
-// NSDestroyObjectFileImage deletes the image if image is not in list of valid images
-//
-
-
-static void 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)
-{
- dyld::setErrorMessage(message);
- strncpy(sLastErrorFilePath, file, 1024);
- sLastErrorFilePath[1023] = '\0';
- sLastErrorFileCode = code;
- sLastErrorNo = errnum;
-}
-
-
-/*
- *_dyld_NSGetExecutablePath is the dyld side of _NSGetExecutablePath which
- * copies the path of the executable into the buffer and returns 0 if the path
- * was successfully copied in the provided buffer. If the buffer is not large
- * enough, -1 is returned and the expected buffer size is copied in *bufsize.
- * Note that _NSGetExecutablePath will return "a path" to the executable not a
- * "real path" to the executable. That is the path may be a symbolic link and
- * not the real file. And with deep directories the total bufsize needed could
- * be more than MAXPATHLEN.
- */
-int _NSGetExecutablePath(char* buf, uint32_t *bufsize)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(...)\n", __func__);
- const char* exePath = dyld::getExecutablePath();
- if(*bufsize < strlen(exePath) + 1){
- *bufsize = strlen(exePath) + 1;
- return -1;
- }
- strcpy(buf, exePath);
- return 0;
-}
-
-
-//
-// _dyld_call_module_initializers_for_dylib() is the dyld side of
-// __initialize_Cplusplus() which is in dylib1.o.
-// It is intended to only be called inside -init rouintes.
-// -init routines are called before module initializers (what C++
-// initializers use). Calling __initialize_Cplusplus() in a -init
-// routine causes the module initializers for an image to be called
-// which then allows C++ to be used inside a -init routine
-//
-static void _dyld_call_module_initializers_for_dylib(const struct mach_header* mh_dylib_header)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "__initialize_Cplusplus()\n");
-
- // for now, do nothing...
-}
-
-
-void _dyld_lookup_and_bind_fully(const char* symbolName, void** address, NSModule* module)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(\"%s\", %p, %p)\n", __func__, symbolName, address, module);
- ImageLoader* image;
- const ImageLoader::Symbol* sym;
- dyld::clearErrorMessage();
- if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
- try {
- dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
- if ( address != NULL)
- *address = (void*)image->getExportedSymbolAddress(sym);
- if ( module != NULL)
- *module = ImageLoaderToNSModule(image);
- }
- catch (const char* msg) {
- dyldAPIhalt(__func__, msg);
- }
- }
- else {
- // on failure to find symbol return NULLs
- if ( address != NULL)
- *address = NULL;
- if ( module != NULL)
- *module = NULL;
- }
-}
-
-// Note: This cannot have public name because dyld is built with a static copy of libc.a
-// which calls dyld_lookup_and_bind() and expects to find dyld's symbols not host process
-static void client_dyld_lookup_and_bind(const char* symbolName, void** address, NSModule* module)
-{
- if ( dyld::gLogAPIs )
- 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);
- if ( module != NULL)
- *module = ImageLoaderToNSModule(image);
- }
- else {
- // on failure to find symbol return NULLs
- if ( address != NULL)
- *address = NULL;
- if ( module != NULL)
- *module = NULL;
- }
-}
-
-void _dyld_lookup_and_bind_with_hint(const char* symbolName, const char* library_name_hint, void** address, NSModule* module)
-{
- if ( dyld::gLogAPIs )
- 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);
- if ( module != NULL)
- *module = ImageLoaderToNSModule(image);
- }
- else {
- // on failure to find symbol return NULLs
- if ( address != NULL)
- *address = NULL;
- if ( module != NULL)
- *module = NULL;
- }
-}
-
-
-NSSymbol NSLookupAndBindSymbol(const char *symbolName)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(\"%s\")\n", __func__, symbolName);
- ImageLoader* image;
- const ImageLoader::Symbol* sym;
- if ( dyld::flatFindExportedSymbol(symbolName, &sym, &image) ) {
- return SymbolToNSSymbol(sym);
- }
- // return NULL on failure
- return NULL;
-}
-
-NSSymbol NSLookupAndBindSymbolWithHint(const char* symbolName, const char* libraryNameHint)
-{
- if ( dyld::gLogAPIs )
- 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 ) {
- // hint failed, do slow search of all images
- found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
- }
- if ( found )
- return SymbolToNSSymbol(sym);
-
- // return NULL on failure and log
- if ( dyld::gLogAPIs )
- 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)
-{
- ImageLoader* image = NULL;
- try {
- dyld::clearErrorMessage();
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
- dyld::LoadContext context;
- context.useSearchPaths = search;
- context.useLdLibraryPath = false;
- context.matchByInstallName = matchInstallName;
- context.dontLoad = dontLoad;
- context.mustBeBundle = false;
- context.mustBeDylib = true;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = NULL; // support not yet implemented
-
- image = load(path, context);
- if ( image != NULL ) {
- if ( context.matchByInstallName )
- image->setMatchInstallPath(true);
- dyld::link(image, ImageLoader::kNonLazyOnly, ImageLoader::kRunInitializers);
- return image->machHeader();
- }
- }
- catch (const char* msg) {
- if ( abortOnError) {
- char pathMsg[strlen(msg)+strlen(path)+4];
- strcpy(pathMsg, msg);
- strcat(pathMsg, " ");
- strcat(pathMsg, path);
- dyldAPIhalt("NSAddImage", pathMsg);
- }
- // not halting, so set error state for NSLinkEditError to find
- setLastError(NSLinkEditOtherError, 0, path, msg);
- }
- return NULL;
-}
-
-const struct mach_header* NSAddImage(const char* path, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- 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) == 0 );
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- return addImage(callerAddress, path, search, dontLoad, matchInstallName, abortOnError);
-}
-
-bool NSAddLibrary(const char* path)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(\"%s\")\n", __func__, path);
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- return (addImage(callerAddress, path, false, false, false, false) != NULL);
-}
-
-bool NSAddLibraryWithSearching(const char* path)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(\"%s\")\n", __func__, path);
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- return (addImage(callerAddress, path, true, false, false, false) != NULL);
-}
-
-
-
-//#define NSADDIMAGE_OPTION_NONE 0x0
-//#define NSADDIMAGE_OPTION_RETURN_ON_ERROR 0x1
-//#define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME 0x8
-
-bool NSIsSymbolNameDefinedInImage(const struct mach_header* mh, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p, \"%s\")\n", __func__, (void *)mh, symbolName);
- ImageLoader* image = dyld::findImageByMachHeader(mh);
- if ( image != 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 )
- 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 ) {
- try {
- if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY ) {
- dyld::link(image, ImageLoader::kLazyOnly, ImageLoader::kDontRunInitializers);
- }
- else if ( options & NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW ) {
- dyld::link(image, ImageLoader::kLazyOnlyNoDependents, ImageLoader::kDontRunInitializers);
- }
- }
- catch (const char* msg) {
- if ( (options & NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR) == 0 ) {
- dyldAPIhalt(__func__, msg);
- }
- }
- symbol = image->findExportedSymbol(symbolName, NULL, true, NULL);
- }
- if ( dyld::gLogAPIs && (symbol == NULL) )
- fprintf(stderr, "%s(%p, \"%s\", 0x%08X) ==> NULL\n", __func__, mh, symbolName, options);
- return SymbolToNSSymbol(symbol);
-}
-
-
-// Note: This cannot have public name because dyld is built with a static copy of libc.a
-// which calls NSIsSymbolNameDefined() and expects to find dyld's symbols not host process
-static bool client_NSIsSymbolNameDefined(const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "NSIsSymbolNameDefined(\"%s\")\n", symbolName);
- ImageLoader* image;
- const ImageLoader::Symbol* sym;
- return dyld::flatFindExportedSymbol(symbolName, &sym, &image);
-}
-
-bool NSIsSymbolNameDefinedWithHint(const char* symbolName, const char* libraryNameHint)
-{
- if ( dyld::gLogAPIs )
- 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 ) {
- // hint failed, do slow search of all images
- found = dyld::flatFindExportedSymbol(symbolName, &sym, &image);
- }
- if ( !found && dyld::gLogAPIs )
- fprintf(stderr, "%s(\"%s\", \"%s\") => false \n", __func__, symbolName, libraryNameHint);
- return found;
-}
-
-const char* NSNameOfSymbol(NSSymbol symbol)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
- const char* result = NULL;
- ImageLoader* image = dyld::findImageContainingAddress(symbol);
- if ( image != NULL )
- result = image->getExportedSymbolName(NSSymbolToSymbol(symbol));
- return result;
-}
-
-void* NSAddressOfSymbol(NSSymbol symbol)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
- void* result = NULL;
- ImageLoader* image = dyld::findImageContainingAddress(symbol);
- if ( image != NULL )
- result = (void*)image->getExportedSymbolAddress(NSSymbolToSymbol(symbol));
- return result;
-}
-
-NSModule NSModuleForSymbol(NSSymbol symbol)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, (void *)symbol);
- NSModule result = NULL;
- 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 )
- 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 )
- fprintf(stderr, "%s(%p)\n", __func__, address);
- dyld::clearErrorMessage();
- ImageLoader* image = dyld::findImageContainingAddress(address);
- if ( image != NULL ) {
- try {
- dyld::link(image, ImageLoader::kLazyAndNonLazy, ImageLoader::kDontRunInitializers);
- return true;
- }
- catch (const char* msg) {
- dyldAPIhalt(__func__, msg);
- }
- }
- return false;
-}
-
-bool _dyld_image_containing_address(const void* address)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, address);
- ImageLoader *imageLoader = dyld::findImageContainingAddress(address);
- return (NULL != imageLoader);
-}
-
-static NSObjectFileImage createObjectImageFile(ImageLoader* image, const void* address = NULL, size_t len=0)
-{
- NSObjectFileImage result = new __NSObjectFileImage();
- result->image = image;
- result->imageBaseAddress = address;
- result->imageLength = len;
- sObjectFileImages.push_back(result);
- return result;
-}
-
-NSObjectFileImageReturnCode NSCreateObjectFileImageFromFile(const char* pathName, NSObjectFileImage *objectFileImage)
-{
- if ( dyld::gLogAPIs )
- 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.useLdLibraryPath = false;
- context.matchByInstallName = false;
- context.dontLoad = false;
- context.mustBeBundle = true;
- context.mustBeDylib = false;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = NULL; // support not yet implemented
-
- ImageLoader* image = dyld::load(pathName, context);
- // Note: We DO NOT link the image! NSLinkModule will do that
- if ( image != NULL ) {
- if ( !image->isBundle() ) {
- // the image must have been already loaded (since context.mustBeBundle will prevent it from being loaded)
- return NSObjectFileImageInappropriateFile;
- }
- *objectFileImage = createObjectImageFile(image);
- return NSObjectFileImageSuccess;
- }
- }
- catch (const char* msg) {
- //fprintf(stderr, "dyld: NSCreateObjectFileImageFromFile() error: %s\n", msg);
- return NSObjectFileImageInappropriateFile;
- }
- return NSObjectFileImageFailure;
-}
-
-
-NSObjectFileImageReturnCode NSCreateObjectFileImageFromMemory(const void* address, size_t size, NSObjectFileImage *objectFileImage)
-{
- if ( dyld::gLogAPIs )
- 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...
- delete image;
- return NSObjectFileImageInappropriateFile;
- }
- // Note: We DO NOT link the image! NSLinkModule will do that
- if ( image != NULL ) {
- *objectFileImage = createObjectImageFile(image, address, size);
- return NSObjectFileImageSuccess;
- }
- }
- catch (const char* msg) {
- fprintf(stderr, "dyld: NSCreateObjectFileImageFromMemory() error: %s\n", msg);
- }
- return NSObjectFileImageFailure;
-}
-
-static bool validOFI(NSObjectFileImage objectFileImage)
-{
- const int ofiCount = sObjectFileImages.size();
- for (int i=0; i < ofiCount; ++i) {
- if ( sObjectFileImages[i] == objectFileImage )
- return true;
- }
- return false;
-}
-
-bool NSDestroyObjectFileImage(NSObjectFileImage objectFileImage)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
-
- if ( validOFI(objectFileImage) ) {
- // 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++) {
- if ( *it == objectFileImage ) {
- sObjectFileImages.erase(it);
- break;
- }
- }
-
- // if object was created from a memory, release that memory
- // NOTE: this is the way dyld has always done this. NSCreateObjectFileImageFromMemory() hands over ownership of the memory to dyld
- if ( objectFileImage->imageBaseAddress != NULL ) {
- vm_deallocate(mach_task_self(), (vm_address_t)objectFileImage->imageBaseAddress, objectFileImage->imageLength);
- }
-
- // free ofi object
- delete objectFileImage;
-
- return true;
- }
- 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 )
- fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
- return objectFileImage->image->getExportedSymbolCount();
-}
-
-const char* NSSymbolDefinitionNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p,%d)\n", __func__, objectFileImage, ordinal);
- const ImageLoader::Symbol* sym = objectFileImage->image->getIndexedExportedSymbol(ordinal);
- return objectFileImage->image->getExportedSymbolName(sym);
-}
-
-uint32_t NSSymbolReferenceCountInObjectFileImage(NSObjectFileImage objectFileImage)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, objectFileImage);
- return objectFileImage->image->getImportedSymbolCount();
-}
-
-const char * NSSymbolReferenceNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal,
- bool* tentative_definition)
-{
- if ( dyld::gLogAPIs )
- 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->geImportedSymbolInfo(sym);
- if ( (flags & ImageLoader::kTentativeDefinition) != 0 )
- *tentative_definition = true;
- else
- *tentative_definition = false;
- }
- return objectFileImage->image->getImportedSymbolName(sym);
-}
-
-void* NSGetSectionDataInObjectFileImage(NSObjectFileImage objectFileImage,
- const char* segmentName, const char* sectionName, unsigned long* size)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p,%s, %s)\n", __func__, objectFileImage, segmentName, sectionName);
-
- void* start;
- size_t length;
- if ( objectFileImage->image->getSectionContent(segmentName, sectionName, &start, &length) ) {
- if ( size != NULL )
- *size = length;
- return start;
- }
- return NULL;
-}
-
-
-
-bool NSIsSymbolDefinedInObjectFileImage(NSObjectFileImage objectFileImage, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- 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 )
- fprintf(stderr, "%s(%p, \"%s\", 0x%08X)\n", __func__, objectFileImage, moduleName, options);
-
- dyld::clearErrorMessage();
- try {
- // 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);
- }
-
- // 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
- 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, bindness, runInitializers);
-
- return ImageLoaderToNSModule(objectFileImage->image);
- }
- catch (const char* msg) {
- 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);
- 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 )
- 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;
- 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
- 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, bindness, runInitializers);
- }
- }
- catch (const char* msg) {
- if ( (options & NSLINKMODULE_OPTION_RETURN_ON_ERROR) == 0 )
- dyldAPIhalt("NSLinkModule", msg);
- // not halting, so set error state for NSLinkEditError to find
- setLastError(NSLinkEditOtherError, 0, moduleName, msg);
- // if image was created for this bundle, destroy it
- if ( image != NULL ) {
- dyld::removeImage(image);
- delete image;
- }
- image = NULL;
- }
- return ImageLoaderToNSModule(image);
-}
-#endif
-
-NSSymbol NSLookupSymbolInModule(NSModule module, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p, \"%s\")\n", __func__, (void *)module, symbolName);
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return NULL;
- return SymbolToNSSymbol(image->findExportedSymbol(symbolName, NULL, false, NULL));
-}
-
-const char* NSNameOfModule(NSModule module)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, module);
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return NULL;
- return image->getPath();
-}
-
-const char* NSLibraryNameForModule(NSModule module)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p)\n", __func__, module);
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image == NULL )
- return NULL;
- return image->getPath();
-}
-
-bool NSUnLinkModule(NSModule module, uint32_t options)
-{
- if ( dyld::gLogAPIs )
- 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::removeImage(image);
-
- if ( (options & NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED) != 0 )
- image->setLeaveMapped();
-
- // TODO: NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES
-
- // Only delete image if there is no ofi referencing it
- // That means the ofi was destroyed after linking, so no one is left to delete this image
- const int ofiCount = sObjectFileImages.size();
- bool found = false;
- for (int i=0; i < ofiCount; ++i) {
- NSObjectFileImage ofi = sObjectFileImages[i];
- if ( ofi->image == image )
- found = true;
- }
- if ( !found )
- delete image;
-
- return true;
-}
-
-// internal name and parameters do not match public name and parameters...
-static void _dyld_install_handlers(void* undefined, void* multiple, void* linkEdit)
-{
- if ( dyld::gLogAPIs )
- 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)
-{
- // FIXME FIXME
- *c = sLastErrorFileCode;
- *errorNumber = sLastErrorNo;
- *fileName = sLastErrorFilePath;
- *errorString = dyld::getErrorMessage();
-}
-
-static void _dyld_register_binding_handler(void * (*bindingHandler)(const char *, const char *, void *), ImageLoader::BindingOptions bindingOptions)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s()\n", __func__);
- dyld::gLinkContext.bindingHandler = bindingHandler;
- dyld::gLinkContext.bindingOptions = bindingOptions;
-}
-
-// 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
-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.
- //
- // In mach_init.h mach_task_self() is #defined to mach_task_self_ and
- // in mach_init() mach_task_self_ is initialized to task_self_trap().
- //
- extern mach_port_t mach_task_self_;
- mach_task_self_ = task_self_trap();
-}
-
-// 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 )
- fprintf(stderr, "%s()\n", __func__);
-
- // ¥¥¥Êif we deprecate prebinding, we may want to consider always returning true or false here
- return dyld::mainExecutablePrebound();
-}
-
-
-//
-// _dyld_NSMakePrivateModulePublic() is the dyld side of the hack
-// NSMakePrivateModulePublic() needed for the dlopen() to turn it's
-// RTLD_LOCAL handles into RTLD_GLOBAL. It just simply turns off the private
-// flag on the image for this module. If the module was found and it was
-// private then everything worked and TRUE is returned else FALSE is returned.
-//
-static bool NSMakePrivateModulePublic(NSModule module)
-{
- ImageLoader* image = NSModuleToImageLoader(module);
- if ( image != NULL ) {
- if ( image->hasHiddenExports() ) {
- image->setHideExports(false);
- return true;
- }
- }
- return false;
-}
-
-
-
-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 )
- fprintf(stderr, "unimplemented dyld function: %s\n", p->name);
- *address = (uintptr_t)p->implementation;
- return true;
- }
- }
- *address = 0;
- return false;
-}
-
-
-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::gThreadHelpers != NULL ) {
- char* buffer = (*dyld::gThreadHelpers->getThreadBufferFor_dlerror)(1);
- buffer[0] = '\0';
- }
-}
-
-static void dlerrorSet(const char* msg)
-{
- 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();
-
- // passing NULL for path means return magic object
- if ( path == NULL ) {
- return RTLD_DEFAULT;
- }
-
- try {
- void* callerAddress = __builtin_return_address(1); // note layers: 1: real client, 0: libSystem glue
- ImageLoader* callerImage = dyld::findImageContainingAddress(callerAddress);
-
- ImageLoader* image = NULL;
- dyld::LoadContext context;
- context.useSearchPaths = true;
- context.useLdLibraryPath= (strchr(path, '/') == NULL); // a leafname implies should search
- context.matchByInstallName = true;
- context.dontLoad = ( (mode & RTLD_NOLOAD) != 0 );
- context.mustBeBundle = false;
- context.mustBeDylib = false;
- context.origin = callerImage != NULL ? callerImage->getPath() : NULL; // caller's image's path
- context.rpath = NULL; // support not yet implemented
-
- image = load(path, context);
- if ( image != NULL ) {
- 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);
- }
- // RTLD_NODELETE means don't unmap image even after dlclosed. This is what dlcompat did on Mac OS X 10.3
- // On other *nix OS's, it means dlclose() should do nothing, but the handle should be invalidated.
- // The subtle differences are:
- // 1) if the image has any termination routines, whether they are run during dlclose or when the process terminates
- // 2) If someone does a supsequent dlopen() on the same image, whether the same address should be used.
- if ( (mode & RTLD_NODELETE) != 0 )
- image->setLeaveMapped();
- 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;
- }
- }
- dlerrorClear();
- return 0;
- }
- else {
- dlerrorSet("invalid handle passed to dlclose()");
- return -1;
- }
-}
-
-
-
-int dladdr(const void* address, Dl_info* info)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p, %p)\n", __func__, address, info);
-
- ImageLoader* image = dyld::findImageContainingAddress(address);
- if ( image != NULL ) {
- info->dli_fname = image->getLogicalPath();
- info->dli_fbase = (void*)image->machHeader();
- // find closest exported symbol in the image
- const uint32_t exportCount = image->getExportedSymbolCount();
- const ImageLoader::Symbol* bestSym = NULL;
- const void* bestAddr = 0;
- for(uint32_t i=0; i < exportCount; ++i) {
- const ImageLoader::Symbol* sym = image->getIndexedExportedSymbol(i);
- const void* symAddr = (void*)image->getExportedSymbolAddress(sym);
- 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;
- }
- return 1; // success
- }
- return 0; // failure
-}
-
-
-char* dlerror()
-{
- if ( dyld::gLogAPIs )
- 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(void* handle, const char* symbolName)
-{
- if ( dyld::gLogAPIs )
- fprintf(stderr, "%s(%p, %s)\n", __func__, handle, symbolName);
-
- dlerrorClear();
-
- ImageLoader* image;
- const ImageLoader::Symbol* sym;
-
- // dlsym() assumes symbolName passed in is same as in C source code
- // dyld assumes all symbol names have an underscore prefix
- char underscoredName[strlen(symbolName)+2];
- underscoredName[0] = '_';
- strcpy(&underscoredName[1], symbolName);
-
- // magic "search all" handle
- if ( handle == RTLD_DEFAULT ) {
- if ( dyld::flatFindExportedSymbol(underscoredName, &sym, &image) ) {
- 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
- 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, &image); // don't search image, but do search what it links against
- if ( sym != NULL ) {
- 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
- 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, &image); // search image and what it links against
- if ( sym != NULL ) {
- 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;
- }
-#endif
- // real handle
- image = (ImageLoader*)handle;
- if ( dyld::validImage(image) ) {
- sym = image->findExportedSymbolInImageOrDependentImages(underscoredName, &image); // search image and what it links against
- if ( sym != NULL ) {
- 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()");
- }
- return NULL;
-}
-
-
-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;
-
- 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);
- }
- 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;
-}
-
-
-
-
-
-
-
-