include/mach-o/dyld.h

   1 /*
   2  * Copyright (c) 1999-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #ifndef _MACH_O_DYLD_H_
  24 #define _MACH_O_DYLD_H_
  25
  26
  27 #include <stddef.h>
  28 #include <stdint.h>
  29 #include <stdbool.h>
  30
  31 #include <mach-o/loader.h>
  32 #include <Availability.h>
  33
  34 #if __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 /*
  39  * The following functions allow you to iterate through all loaded images.
  40  * This is not a thread safe operation.  Another thread can add or remove
  41  * an image during the iteration.
  42  *
  43  * Many uses of these routines can be replace by a call to dladdr() which
  44  * will return the mach_header and name of an image, given an address in
  45  * the image. dladdr() is thread safe.
  46  */
  47 extern uint32_t                    _dyld_image_count(void)                              __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  48 extern const struct mach_header*   _dyld_get_image_header(uint32_t image_index)         __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  49 extern intptr_t                    _dyld_get_image_vmaddr_slide(uint32_t image_index)   __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  50 extern const char*                 _dyld_get_image_name(uint32_t image_index)           __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  51
  52
  53 /*
  54  * The following functions allow you to install callbacks which will be called
  55  * by dyld whenever an image is loaded or unloaded.  During a call to _dyld_register_func_for_add_image()
  56  * the callback func is called for every existing image.  Later, it is called as each new image
  57  * is loaded and bound (but initializers not yet run).  The callback registered with
  58  * _dyld_register_func_for_remove_image() is called after any terminators in an image are run
  59  * and before the image is un-memory-mapped.
  60  */
  61 extern void _dyld_register_func_for_add_image(void (*func)(const struct mach_header* mh, intptr_t vmaddr_slide))    __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  62 extern void _dyld_register_func_for_remove_image(void (*func)(const struct mach_header* mh, intptr_t vmaddr_slide)) __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  63
  64
  65 /*
  66  * NSVersionOfRunTimeLibrary() returns the current_version number of the currently dylib
  67  * specifed by the libraryName.  The libraryName parameter would be "bar" for /path/libbar.3.dylib and
  68  * "Foo" for /path/Foo.framework/Versions/A/Foo.  It returns -1 if no such library is loaded.
  69  */
  70 extern int32_t NSVersionOfRunTimeLibrary(const char* libraryName)            __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  71
  72
  73 /*
  74  * NSVersionOfLinkTimeLibrary() returns the current_version number that the main executable was linked
  75  * against at build time.  The libraryName parameter would be "bar" for /path/libbar.3.dylib and
  76  * "Foo" for /path/Foo.framework/Versions/A/Foo.  It returns -1 if the main executable did not link
  77  * against the specified library.
  78  */
  79 extern int32_t NSVersionOfLinkTimeLibrary(const char* libraryName)           __OSX_AVAILABLE_STARTING(__MAC_10_1, __IPHONE_2_0);
  80
  81
  82 /*
  83  * _NSGetExecutablePath() copies the path of the main executable into the buffer. The bufsize parameter
  84  * should initially be the size of the buffer.  The function returns 0 if the path was successfully copied,
  85  * and *bufsize is left unchanged. It returns -1 if the buffer is not large enough, and *bufsize is set
  86  * to the size required.
  87  *
  88  * Note that _NSGetExecutablePath will return "a path" to the executable not a "real path" to the executable.
  89  * That is the path may be a symbolic link and not the real file. With deep directories the total bufsize
  90  * needed could be more than MAXPATHLEN.
  91  */
  92 extern int _NSGetExecutablePath(char* buf, uint32_t* bufsize)                 __OSX_AVAILABLE_STARTING(__MAC_10_2, __IPHONE_2_0);
  93
  94
  95
  96
  97
  98
  99 /*
 100  * The following dyld API's are deprecated as of Mac OS X 10.5.  They are either
 101  * no longer necessary or are superceeded by dlopen and friends in <dlfcn.h>.
 102  * dlopen/dlsym/dlclose have been available since Mac OS X 10.3 and work with
 103  * dylibs and bundles.
 104  *
 105  *    NSAddImage                           -> dlopen
 106  *    NSLookupSymbolInImage                -> dlsym
 107  *    NSCreateObjectFileImageFromFile      -> dlopen
 108  *    NSDestroyObjectFileImage             -> dlclose
 109  *    NSLinkModule                         -> not needed when dlopen used
 110  *    NSUnLinkModule                       -> not needed when dlclose used
 111  *    NSLookupSymbolInModule               -> dlsym
 112  *    _dyld_image_containing_address       -> dladdr
 113  *    NSLinkEditError                      -> dlerror
 114  *
 115  */
 116
 117 #ifndef ENUM_DYLD_BOOL
 118 #define ENUM_DYLD_BOOL
 119   #undef FALSE
 120   #undef TRUE
 121   enum DYLD_BOOL { FALSE, TRUE };
 122 #endif /* ENUM_DYLD_BOOL */
 123
 124
 125 /* Object file image API */
 126 typedef enum {
 127     NSObjectFileImageFailure, /* for this a message is printed on stderr */
 128     NSObjectFileImageSuccess,
 129     NSObjectFileImageInappropriateFile,
 130     NSObjectFileImageArch,
 131     NSObjectFileImageFormat, /* for this a message is printed on stderr */
 132     NSObjectFileImageAccess
 133 } NSObjectFileImageReturnCode;
 134
 135 typedef struct __NSObjectFileImage*  NSObjectFileImage;
 136
 137 /* NSObjectFileImage can only be used with MH_BUNDLE files */
 138 extern NSObjectFileImageReturnCode NSCreateObjectFileImageFromFile(const char* pathName, NSObjectFileImage *objectFileImage)               __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 139 extern NSObjectFileImageReturnCode NSCreateObjectFileImageFromMemory(const void *address, size_t size, NSObjectFileImage *objectFileImage) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 140 extern bool                        NSDestroyObjectFileImage(NSObjectFileImage objectFileImage)                                             __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 141
 142 extern uint32_t     NSSymbolDefinitionCountInObjectFileImage(NSObjectFileImage objectFileImage)                   __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 143 extern const char*  NSSymbolDefinitionNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal)  __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 144 extern uint32_t     NSSymbolReferenceCountInObjectFileImage(NSObjectFileImage objectFileImage)                    __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 145 extern const char*  NSSymbolReferenceNameInObjectFileImage(NSObjectFileImage objectFileImage, uint32_t ordinal, bool *tentative_definition) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 146 extern bool         NSIsSymbolDefinedInObjectFileImage(NSObjectFileImage objectFileImage, const char* symbolName) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 147 extern void*        NSGetSectionDataInObjectFileImage(NSObjectFileImage objectFileImage, const char* segmentName, const char* sectionName, size_t *size) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 148 extern bool         NSHasModInitObjectFileImage(NSObjectFileImage objectFileImage)                                __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_3,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 149
 150 typedef struct __NSModule* NSModule;
 151 extern const char*  NSNameOfModule(NSModule m)         __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 152 extern const char*  NSLibraryNameForModule(NSModule m) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 153
 154 extern NSModule NSLinkModule(NSObjectFileImage objectFileImage, const char* moduleName, uint32_t options) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 155 #define NSLINKMODULE_OPTION_NONE                         0x0
 156 #define NSLINKMODULE_OPTION_BINDNOW                      0x1
 157 #define NSLINKMODULE_OPTION_PRIVATE                      0x2
 158 #define NSLINKMODULE_OPTION_RETURN_ON_ERROR              0x4
 159 #define NSLINKMODULE_OPTION_DONT_CALL_MOD_INIT_ROUTINES  0x8
 160 #define NSLINKMODULE_OPTION_TRAILING_PHYS_NAME          0x10
 161
 162 extern bool NSUnLinkModule(NSModule module, uint32_t options) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 163 #define NSUNLINKMODULE_OPTION_NONE                  0x0
 164 #define NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED    0x1
 165 #define NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES     0x2
 166
 167 /* symbol API */
 168 typedef struct __NSSymbol* NSSymbol;
 169 extern bool     NSIsSymbolNameDefined(const char* symbolName)                                                    __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 170 extern bool     NSIsSymbolNameDefinedWithHint(const char* symbolName, const char* libraryNameHint)               __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 171 extern bool     NSIsSymbolNameDefinedInImage(const struct mach_header* image, const char* symbolName)            __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 172 extern NSSymbol NSLookupAndBindSymbol(const char* symbolName)                                                    __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 173 extern NSSymbol NSLookupAndBindSymbolWithHint(const char* symbolName, const char* libraryNameHint)               __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 174 extern NSSymbol NSLookupSymbolInModule(NSModule module, const char* symbolName)                                  __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 175 extern NSSymbol NSLookupSymbolInImage(const struct mach_header* image, const char* symbolName, uint32_t options) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 176 #define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND            0x0
 177 #define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW        0x1
 178 #define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY      0x2
 179 #define NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR 0x4
 180 extern const char*  NSNameOfSymbol(NSSymbol symbol)    __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 181 extern void *       NSAddressOfSymbol(NSSymbol symbol) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 182 extern NSModule     NSModuleForSymbol(NSSymbol symbol) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 183
 184 /* error handling API */
 185 typedef enum {
 186     NSLinkEditFileAccessError,
 187     NSLinkEditFileFormatError,
 188     NSLinkEditMachResourceError,
 189     NSLinkEditUnixResourceError,
 190     NSLinkEditOtherError,
 191     NSLinkEditWarningError,
 192     NSLinkEditMultiplyDefinedError,
 193     NSLinkEditUndefinedError
 194 } NSLinkEditErrors;
 195
 196 /*
 197  * For the NSLinkEditErrors value NSLinkEditOtherError these are the values
 198  * passed to the link edit error handler as the errorNumber (what would be an
 199  * errno value for NSLinkEditUnixResourceError or a kern_return_t value for
 200  * NSLinkEditMachResourceError).
 201  */
 202 typedef enum {
 203     NSOtherErrorRelocation,
 204     NSOtherErrorLazyBind,
 205     NSOtherErrorIndrLoop,
 206     NSOtherErrorLazyInit,
 207     NSOtherErrorInvalidArgs
 208 } NSOtherErrorNumbers;
 209
 210 extern void NSLinkEditError(NSLinkEditErrors *c, int *errorNumber, const char** fileName, const char** errorString) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 211
 212 typedef struct {
 213      void     (*undefined)(const char* symbolName);
 214      NSModule (*multiple)(NSSymbol s, NSModule oldModule, NSModule newModule);
 215      void     (*linkEdit)(NSLinkEditErrors errorClass, int errorNumber,
 216                           const char* fileName, const char* errorString);
 217 } NSLinkEditErrorHandlers;
 218
 219 extern void NSInstallLinkEditErrorHandlers(const NSLinkEditErrorHandlers *handlers) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 220
 221 extern bool                      NSAddLibrary(const char* pathName)                   __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 222 extern bool                      NSAddLibraryWithSearching(const char* pathName)      __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 223 extern const struct mach_header* NSAddImage(const char* image_name, uint32_t options) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 224 #define NSADDIMAGE_OPTION_NONE                          0x0
 225 #define NSADDIMAGE_OPTION_RETURN_ON_ERROR               0x1
 226 #define NSADDIMAGE_OPTION_WITH_SEARCHING                0x2
 227 #define NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED         0x4
 228 #define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME 0x8
 229
 230 extern bool _dyld_present(void)                                                              __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 231 extern bool _dyld_launched_prebound(void)                                                    __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 232 extern bool _dyld_all_twolevel_modules_prebound(void)                                        __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_3,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 233 extern void _dyld_bind_objc_module(const void* objc_module)                                  __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 234 extern bool _dyld_bind_fully_image_containing_address(const void* address)                   __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 235 extern bool _dyld_image_containing_address(const void* address)                              __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_3,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 236 extern void _dyld_lookup_and_bind(const char* symbol_name, void **address, NSModule* module) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 237 extern void _dyld_lookup_and_bind_with_hint(const char* symbol_name, const char* library_name_hint, void** address, NSModule* module) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_4,__IPHONE_NA,__IPHONE_NA);
 238 extern void _dyld_lookup_and_bind_fully(const char* symbol_name, void** address, NSModule* module) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 239
 240 extern const struct mach_header*  _dyld_get_image_header_containing_address(const void* address) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_3,__MAC_10_5,__IPHONE_NA,__IPHONE_NA);
 241
 242
 243 #if __cplusplus
 244 }
 245 #endif
 246
 247 #endif /* _MACH_O_DYLD_H_ */