X-Git-Url: https://git.saurik.com/apple/dyld.git/blobdiff_plain/832b6fce7c321434378950ecd081b6c34cc3a24f..ba4c3badc27ea8c4637b4e91a49725742a02a53c:/src/dyldAPIsInLibSystem.cpp diff --git a/src/dyldAPIsInLibSystem.cpp b/src/dyldAPIsInLibSystem.cpp index 0417585..d556e9d 100644 --- a/src/dyldAPIsInLibSystem.cpp +++ b/src/dyldAPIsInLibSystem.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) 2004-2012 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * @@ -25,18 +25,48 @@ #include #include #include +#include +#include +#include #include #include +#include +#include +#include + +#include "mach-o/dyld_images.h" #include "mach-o/dyld.h" #include "mach-o/dyld_priv.h" +#include "dyld_cache_format.h" +#include "ImageLoader.h" #include "dyldLock.h" +#include "../dyld3/APIs.h" +#include "../dyld3/AllImages.h" +#include "../dyld3/StartGlue.h" +#include "../dyld3/Tracing.h" + + +// 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() __attribute__((visibility("hidden"))); +} + + extern "C" int __cxa_atexit(void (*func)(void *), void *arg, void *dso); extern "C" void __cxa_finalize(const void *dso); +extern "C" void __cxa_finalize_ranges(const struct __cxa_range_t ranges[], int count); + +// +// private interface between libSystem.dylib and dyld +// +extern "C" int _dyld_func_lookup(const char* dyld_func_name, void **address); + +extern bool gUseDyld3; #ifndef LC_VERSION_MIN_MACOSX #define LC_VERSION_MIN_MACOSX 0x24 @@ -53,12 +83,54 @@ extern "C" void __cxa_finalize(const void *dso); #define LC_VERSION_MIN_IPHONEOS 0x25 #endif +#ifndef LC_VERSION_MIN_TVOS + #define LC_VERSION_MIN_TVOS 0x2F +#endif + +#ifndef LC_VERSION_MIN_WATCHOS + #define LC_VERSION_MIN_WATCHOS 0x30 +#endif + #ifndef LC_LOAD_UPWARD_DYLIB #define LC_LOAD_UPWARD_DYLIB (0x23|LC_REQ_DYLD) /* load of dylib whose initializers run later */ #endif -#define DYLD_SHARED_CACHE_SUPPORT (__i386__ || __x86_64__ || __arm__) +#ifndef LC_BUILD_VERSION + #define LC_BUILD_VERSION 0x32 /* build for platform min OS version */ + + /* + * The build_version_command contains the min OS version on which this + * binary was built to run for its platform. The list of known platforms and + * tool values following it. + */ + struct build_version_command { + uint32_t cmd; /* LC_BUILD_VERSION */ + uint32_t cmdsize; /* sizeof(struct build_version_command) plus */ + /* ntools * sizeof(struct build_tool_version) */ + uint32_t platform; /* platform */ + uint32_t minos; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */ + uint32_t sdk; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */ + uint32_t ntools; /* number of tool entries following this */ + }; + + struct build_tool_version { + uint32_t tool; /* enum for the tool */ + uint32_t version; /* version number of the tool */ + }; + + /* Known values for the platform field above. */ + #define PLATFORM_MACOS 1 + #define PLATFORM_IOS 2 + #define PLATFORM_TVOS 3 + #define PLATFORM_WATCHOS 4 + #define PLATFORM_BRIDGEOS 5 + + /* Known values for the tool field above. */ + #define TOOL_CLANG 1 + #define TOOL_SWIFT 2 + #define TOOL_LD 3 +#endif // deprecated APIs are still availble on Mac OS X, but not on iPhone OS #if __IPHONE_OS_VERSION_MIN_REQUIRED @@ -76,10 +148,10 @@ extern "C" void __cxa_finalize(const void *dso); static bool names_match( -char *install_name, +const char *install_name, const char* libraryName) { - char *basename; + const char *basename; unsigned long n; /* @@ -100,7 +172,7 @@ const char* libraryName) * of the -framework cases. */ if(strcmp(basename, libraryName) == 0) - return(TRUE); + return true; /* * Now check the base name for "lib" if so proceed to check for the @@ -110,14 +182,14 @@ const char* libraryName) n = strlen(libraryName); if(strncmp(basename+3, libraryName, n) == 0){ if(strncmp(basename+3+n, ".dylib", 6) == 0) - return(TRUE); + return true; if(basename[3+n] == '.' && basename[3+n+1] != '\0' && strncmp(basename+3+n+2, ".dylib", 6) == 0) - return(TRUE); + return true; } } - return(FALSE); + return false; } #if DEPRECATED_APIS_SUPPORTED @@ -125,6 +197,9 @@ const char* libraryName) void NSInstallLinkEditErrorHandlers( const NSLinkEditErrorHandlers* handlers) { + if ( gUseDyld3 ) + return dyld3::NSInstallLinkEditErrorHandlers(handlers); + DYLD_LOCK_THIS_BLOCK; typedef void (*ucallback_t)(const char* symbol_name); typedef NSModule (*mcallback_t)(NSSymbol s, NSModule old, NSModule newhandler); @@ -142,6 +217,9 @@ const char* NSNameOfModule( NSModule module) { + if ( gUseDyld3 ) + return dyld3::NSNameOfModule(module); + DYLD_LOCK_THIS_BLOCK; static const char* (*p)(NSModule module) = NULL; @@ -154,6 +232,9 @@ const char* NSLibraryNameForModule( NSModule module) { + if ( gUseDyld3 ) + return dyld3::NSLibraryNameForModule(module); + DYLD_LOCK_THIS_BLOCK; static const char* (*p)(NSModule module) = NULL; @@ -166,6 +247,9 @@ bool NSIsSymbolNameDefined( const char* symbolName) { + if ( gUseDyld3 ) + return dyld3::NSIsSymbolNameDefined(symbolName); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(const char* symbolName) = NULL; @@ -179,6 +263,9 @@ NSIsSymbolNameDefinedWithHint( const char* symbolName, const char* libraryNameHint) { + if ( gUseDyld3 ) + return dyld3::NSIsSymbolNameDefinedWithHint(symbolName, libraryNameHint); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(const char* symbolName, const char* libraryNameHint) = NULL; @@ -193,6 +280,9 @@ NSIsSymbolNameDefinedInImage( const struct mach_header *image, const char* symbolName) { + if ( gUseDyld3 ) + return dyld3::NSIsSymbolNameDefinedInImage(image, symbolName); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(const struct mach_header *image, const char* symbolName) = NULL; @@ -206,6 +296,9 @@ NSSymbol NSLookupAndBindSymbol( const char* symbolName) { + if ( gUseDyld3 ) + return dyld3::NSLookupAndBindSymbol(symbolName); + DYLD_LOCK_THIS_BLOCK; static NSSymbol (*p)(const char* symbolName) = NULL; @@ -219,6 +312,9 @@ NSLookupAndBindSymbolWithHint( const char* symbolName, const char* libraryNameHint) { + if ( gUseDyld3 ) + return dyld3::NSLookupAndBindSymbolWithHint(symbolName, libraryNameHint); + DYLD_LOCK_THIS_BLOCK; static NSSymbol (*p)(const char* symbolName, const char* libraryNameHint) = NULL; @@ -233,6 +329,9 @@ NSLookupSymbolInModule( NSModule module, const char* symbolName) { + if ( gUseDyld3 ) + return dyld3::NSLookupSymbolInModule(module, symbolName); + DYLD_LOCK_THIS_BLOCK; static NSSymbol (*p)(NSModule module, const char* symbolName) = NULL; @@ -247,8 +346,11 @@ const struct mach_header *image, const char* symbolName, uint32_t options) { + if ( gUseDyld3 ) + return dyld3::NSLookupSymbolInImage(image, symbolName, options); + DYLD_LOCK_THIS_BLOCK; - static NSSymbol (*p)(const struct mach_header *image, + static NSSymbol (*p)(const struct mach_header *image, const char* symbolName, uint32_t options) = NULL; @@ -261,6 +363,9 @@ const char* NSNameOfSymbol( NSSymbol symbol) { + if ( gUseDyld3 ) + return dyld3::NSNameOfSymbol(symbol); + DYLD_LOCK_THIS_BLOCK; static char * (*p)(NSSymbol symbol) = NULL; @@ -273,6 +378,9 @@ void * NSAddressOfSymbol( NSSymbol symbol) { + if ( gUseDyld3 ) + return dyld3::NSAddressOfSymbol(symbol); + DYLD_LOCK_THIS_BLOCK; static void * (*p)(NSSymbol symbol) = NULL; @@ -285,6 +393,9 @@ NSModule NSModuleForSymbol( NSSymbol symbol) { + if ( gUseDyld3 ) + return dyld3::NSModuleForSymbol(symbol); + DYLD_LOCK_THIS_BLOCK; static NSModule (*p)(NSSymbol symbol) = NULL; @@ -297,6 +408,9 @@ bool NSAddLibrary( const char* pathName) { + if ( gUseDyld3 ) + return dyld3::NSAddLibrary(pathName); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(const char* pathName) = NULL; @@ -309,6 +423,9 @@ bool NSAddLibraryWithSearching( const char* pathName) { + if ( gUseDyld3 ) + return dyld3::NSAddLibrary(pathName); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(const char* pathName) = NULL; @@ -322,6 +439,9 @@ NSAddImage( const char* image_name, uint32_t options) { + if ( gUseDyld3 ) + return dyld3::NSAddImage(image_name, options); + DYLD_LOCK_THIS_BLOCK; static const struct mach_header * (*p)(const char* image_name, uint32_t options) = NULL; @@ -343,42 +463,38 @@ uint32_t options) * and not a list of current versions that dependent libraries and bundles the * program is using were built with. */ -int32_t -NSVersionOfLinkTimeLibrary( -const char* libraryName) +int32_t NSVersionOfLinkTimeLibrary(const char* libraryName) { - unsigned long i; - struct load_command *load_commands, *lc; - struct dylib_command *dl; - char *install_name; + if ( gUseDyld3 ) + return dyld3::NSVersionOfLinkTimeLibrary(libraryName); + + // Lazily call _NSGetMachExecuteHeader() and cache result #if __LP64__ - static struct mach_header_64 *mh = NULL; + static mach_header_64* mh = NULL; #else - static struct mach_header *mh = NULL; + static mach_header* mh = NULL; #endif - if(mh == NULL) + if ( mh == NULL ) mh = _NSGetMachExecuteHeader(); - load_commands = (struct load_command *) #if __LP64__ - ((char *)mh + sizeof(struct mach_header_64)); + const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64)); #else - ((char *)mh + sizeof(struct mach_header)); + const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header)); #endif - lc = load_commands; - for(i = 0; i < mh->ncmds; i++){ + for(uint32_t i = 0; i < mh->ncmds; i++){ switch ( lc->cmd ) { case LC_LOAD_DYLIB: case LC_LOAD_WEAK_DYLIB: case LC_LOAD_UPWARD_DYLIB: - dl = (struct dylib_command *)lc; - install_name = (char *)dl + dl->dylib.name.offset; - if(names_match(install_name, libraryName) == TRUE) - return(dl->dylib.current_version); + const dylib_command* dl = (dylib_command *)lc; + const char* install_name = (char*)dl + dl->dylib.name.offset; + if ( names_match(install_name, libraryName) ) + return dl->dylib.current_version; break; } - lc = (struct load_command *)((char *)lc + lc->cmdsize); + lc = (load_command*)((char*)lc + lc->cmdsize); } - return(-1); + return (-1); } /* @@ -388,153 +504,228 @@ const char* libraryName) * it would be "x" and with -framework Foo it would be "Foo"). If the program * is not using the specified library it returns -1. */ -int32_t -NSVersionOfRunTimeLibrary( -const char* libraryName) -{ - unsigned long i, j, n; - char *install_name; - struct load_command *load_commands, *lc; - struct dylib_command *dl; - const struct mach_header *mh; - - n = _dyld_image_count(); - for(i = 0; i < n; i++){ - mh = _dyld_get_image_header(i); - if(mh->filetype != MH_DYLIB) - continue; - load_commands = (struct load_command *) +int32_t NSVersionOfRunTimeLibrary(const char* libraryName) +{ + if ( gUseDyld3 ) + return dyld3::NSVersionOfRunTimeLibrary(libraryName); + + uint32_t n = _dyld_image_count(); + for(uint32_t i = 0; i < n; i++){ + const mach_header* mh = _dyld_get_image_header(i); + if ( mh == NULL ) + continue; + if ( mh->filetype != MH_DYLIB ) + continue; #if __LP64__ - ((char *)mh + sizeof(struct mach_header_64)); + const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64)); #else - ((char *)mh + sizeof(struct mach_header)); + const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header)); #endif - lc = load_commands; - for(j = 0; j < mh->ncmds; j++){ - if(lc->cmd == LC_ID_DYLIB){ - dl = (struct dylib_command *)lc; - install_name = (char *)dl + dl->dylib.name.offset; - if(names_match(install_name, libraryName) == TRUE) - return(dl->dylib.current_version); - } - lc = (struct load_command *)((char *)lc + lc->cmdsize); + for(uint32_t j = 0; j < mh->ncmds; j++){ + if ( lc->cmd == LC_ID_DYLIB ) { + const dylib_command* dl = (dylib_command*)lc; + const char* install_name = (char *)dl + dl->dylib.name.offset; + if ( names_match(install_name, libraryName) ) + return dl->dylib.current_version; + } + lc = (load_command*)((char*)lc + lc->cmdsize); } } - return(-1); + return (-1); +} + +#if TARGET_OS_WATCH +uint32_t dyld_get_program_sdk_watch_os_version() +{ + if (gUseDyld3) + return dyld3::dyld_get_program_sdk_watch_os_version(); + + __block uint32_t retval = 0; + __block bool versionFound = false; + dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) { + if (versionFound) return; + + if (dyld_get_base_platform(platform) == PLATFORM_WATCHOS) { + versionFound = true; + retval = sdk_version; + } + }); + + return retval; +} + +uint32_t dyld_get_program_min_watch_os_version() +{ + if (gUseDyld3) + return dyld3::dyld_get_program_min_watch_os_version(); + + __block uint32_t retval = 0; + __block bool versionFound = false; + dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) { + if (versionFound) return; + + if (dyld_get_base_platform(platform) == PLATFORM_WATCHOS) { + versionFound = true; + retval = min_version; + } + }); + + return retval; +} +#endif + +#if TARGET_OS_BRIDGE +uint32_t dyld_get_program_sdk_bridge_os_version() +{ + if (gUseDyld3) + return dyld3::dyld_get_program_sdk_bridge_os_version(); + + __block uint32_t retval = 0; + __block bool versionFound = false; + dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) { + if (versionFound) return; + + if (dyld_get_base_platform(platform) == PLATFORM_BRIDGEOS) { + versionFound = true; + retval = sdk_version; + } + }); + + return retval; } +uint32_t dyld_get_program_min_bridge_os_version() +{ + if (gUseDyld3) + return dyld3::dyld_get_program_min_bridge_os_version(); + + __block uint32_t retval = 0; + __block bool versionFound = false; + dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) { + if (versionFound) return; + + if (dyld_get_base_platform(platform) == PLATFORM_BRIDGEOS) { + versionFound = true; + retval = min_version; + } + }); + + return retval; +} +#endif /* * Returns the sdk version (encode as nibble XXXX.YY.ZZ) the * specified binary was built against. * - * First looks for LC_VERSION_MIN_MACOSX/LC_VERSION_MIN_IPHONEOS - * in binary and if sdk field is not zero, return that value. + * First looks for LC_VERSION_MIN_* in binary and if sdk field is + * not zero, return that value. * Otherwise, looks for the libSystem.B.dylib the binary linked * against and uses a table to convert that to an sdk version. */ uint32_t dyld_get_sdk_version(const mach_header* mh) { -#if __LP64__ - const load_command* cmds = (load_command*)((char *)mh + sizeof(mach_header_64)); -#else - const load_command* cmds = (load_command*)((char *)mh + sizeof(mach_header)); -#endif - const version_min_command* versCmd; - const dylib_command* dylibCmd; - const load_command* cmd = cmds; - uint32_t libSystemVers = 0; - for(uint32_t i = 0; i < mh->ncmds; ++i) { - switch ( cmd->cmd ) { - case LC_VERSION_MIN_MACOSX: - case LC_VERSION_MIN_IPHONEOS: - versCmd = (version_min_command*)cmd; - if ( versCmd->sdk != 0 ) - return versCmd->sdk; // found explicit SDK version - break; - case LC_LOAD_DYLIB: - case LC_LOAD_WEAK_DYLIB: - case LC_LOAD_UPWARD_DYLIB: - dylibCmd = (dylib_command*)cmd; - if ( strcmp((char*)dylibCmd + dylibCmd->dylib.name.offset, "/usr/lib/libSystem.B.dylib") == 0 ) - libSystemVers = dylibCmd->dylib.current_version; - else if ( strcmp((char*)dylibCmd + dylibCmd->dylib.name.offset, "/usr/lib/libSystem.dylib") == 0 ) - return 0x00040000; // all iOS simulator have same libSystem.dylib version - break; - } - cmd = (load_command*)((char *)cmd + cmd->cmdsize); - } - - if ( libSystemVers != 0 ) { - // found linked libSystem.B.dylib version linked against -#if __IPHONE_OS_VERSION_MIN_REQUIRED - // convert libSystem.B.dylib version to iOS sdk version - if ( libSystemVers < 0x006F0010 ) // libSystem 111.0.16 in 3.0 - return 0x00020000; // 2.0 - else if ( libSystemVers < 0x006F0201 ) // libSystem 111.2.1 in 3.1 - return 0x00030000; // 3.0 - else if ( libSystemVers < 0x007D020B ) // libSystem 125.2.11 in 4.0 - return 0x00030100; // 3.1 - else if ( libSystemVers < 0x007D0400 ) // libSystem 125.4 in 4.1 and in 4.2 - return 0x00040000; // 4.0 - else if ( libSystemVers < 0x009F0000 ) // libSystem 159 in 4.3 - return 0x00040100; // 4.1 - else if ( libSystemVers < 0x00A10000 ) // libSystem 161 in 5.0 - return 0x00040300; // 4.3 - else - return 0x00050000; -#else - // convert libSystem.B.dylib version to MacOSX sdk version - if ( libSystemVers < 0x006F0000 ) // libSystem 111 in 10.5 - return 0x000A0400; // 10.4 - else if ( libSystemVers < 0x007B0000 ) // libSystem 123 in 10.6 - return 0x000A0500; // 10.5 - else if ( libSystemVers < 0x009F0000 ) // libSystem 159 in 10.7 - return 0x000A0600; // 10.6 - else if ( libSystemVers < 0x00A10000 ) // libSystem 161 in 10.8 - return 0x000A0700; // 10.7 - else - return 0x000A0800; // 10.8 -#endif - } - - return 0; + return dyld3::dyld_get_sdk_version(mh); } uint32_t dyld_get_program_sdk_version() { - return dyld_get_sdk_version((mach_header*)_NSGetMachExecuteHeader()); + return dyld3::dyld_get_sdk_version((mach_header*)_NSGetMachExecuteHeader()); } - uint32_t dyld_get_min_os_version(const struct mach_header* mh) { -#if __LP64__ - const load_command* cmds = (load_command*)((char *)mh + sizeof(mach_header_64)); -#else - const load_command* cmds = (load_command*)((char *)mh + sizeof(mach_header)); -#endif - const version_min_command* versCmd; - const load_command* cmd = cmds; + return dyld3::dyld_get_min_os_version(mh); +} + + +uint32_t dyld_get_program_min_os_version() +{ + return dyld3::dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader()); +} + + +bool _dyld_get_image_uuid(const struct mach_header* mh, uuid_t uuid) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_get_image_uuid(mh, uuid); + + const load_command* startCmds = NULL; + if ( mh->magic == MH_MAGIC_64 ) + startCmds = (load_command*)((char *)mh + sizeof(mach_header_64)); + else if ( mh->magic == MH_MAGIC ) + startCmds = (load_command*)((char *)mh + sizeof(mach_header)); + else + return false; // not a mach-o file, or wrong endianness + + const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds); + const load_command* cmd = startCmds; for(uint32_t i = 0; i < mh->ncmds; ++i) { - switch ( cmd->cmd ) { - case LC_VERSION_MIN_MACOSX: - case LC_VERSION_MIN_IPHONEOS: - versCmd = (version_min_command*)cmd; - return versCmd->version; // found explicit min OS version - break; + const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize); + if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds)) { + return false; } - cmd = (load_command*)((char *)cmd + cmd->cmdsize); + if ( cmd->cmd == LC_UUID ) { + const uuid_command* uuidCmd = (uuid_command*)cmd; + memcpy(uuid, uuidCmd->uuid, 16); + return true; + } + cmd = nextCmd; } - return 0; + bzero(uuid, 16); + return false; } +dyld_platform_t dyld_get_active_platform(void) { + if (gUseDyld3) + return dyld3::dyld_get_active_platform(); -uint32_t dyld_get_program_min_os_version() -{ - return dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader()); + // HACK + // Most of the new version SPIs have pure dyld3 implementations, but + // They cannot get to the main executable, so we implement this here + // and they can use this by calling ::dyld_get_active_platform() in the root namespace + static dyld_platform_t sActivePlatform = 0; + if (sActivePlatform) return sActivePlatform; + + dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) { + sActivePlatform = platform; + //FIXME assert there is only one? + }); + return sActivePlatform; +} + +dyld_platform_t dyld_get_base_platform(dyld_platform_t platform) { + return dyld3::dyld_get_base_platform(platform); +} + +bool dyld_is_simulator_platform(dyld_platform_t platform) { + return dyld3::dyld_is_simulator_platform(platform); +} + +bool dyld_sdk_at_least(const struct mach_header* mh, dyld_build_version_t version) { + return dyld3::dyld_sdk_at_least(mh, version); +} + +bool dyld_minos_at_least(const struct mach_header* mh, dyld_build_version_t version) { + return dyld3::dyld_minos_at_least(mh, version); +} + +bool dyld_program_sdk_at_least(dyld_build_version_t version) { + return dyld3::dyld_sdk_at_least((mach_header*)_NSGetMachExecuteHeader(),version); +} + +bool dyld_program_minos_at_least(dyld_build_version_t version) { + return dyld3::dyld_minos_at_least((mach_header*)_NSGetMachExecuteHeader(), version); } +// Function that walks through the load commands and calls the internal block for every version found +// Intended as a fallback for very complex (and rare) version checks, or for tools that need to +// print our everything for diagnostic reasons +void dyld_get_image_versions(const struct mach_header* mh, void (^callback)(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version)) { + dyld3::dyld_get_image_versions(mh, callback); +} + + #if DEPRECATED_APIS_SUPPORTED /* @@ -549,6 +740,9 @@ NSCreateObjectFileImageFromFile( const char* pathName, NSObjectFileImage *objectFileImage) { + if ( gUseDyld3 ) + return dyld3::NSCreateObjectFileImageFromFile(pathName, objectFileImage); + DYLD_LOCK_THIS_BLOCK; static NSObjectFileImageReturnCode (*p)(const char*, NSObjectFileImage*) = NULL; @@ -571,6 +765,9 @@ const void* address, size_t size, NSObjectFileImage *objectFileImage) { + if ( gUseDyld3 ) + return dyld3::NSCreateObjectFileImageFromMemory(address, size, objectFileImage); + DYLD_LOCK_THIS_BLOCK; static NSObjectFileImageReturnCode (*p)(const void*, size_t, NSObjectFileImage*) = NULL; @@ -604,6 +801,9 @@ bool NSDestroyObjectFileImage( NSObjectFileImage objectFileImage) { + if ( gUseDyld3 ) + return dyld3::NSDestroyObjectFileImage(objectFileImage); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(NSObjectFileImage) = NULL; @@ -619,6 +819,9 @@ NSObjectFileImage objectFileImage, const char* moduleName, uint32_t options) { + if ( gUseDyld3 ) + return dyld3::NSLinkModule(objectFileImage, moduleName, options); + DYLD_LOCK_THIS_BLOCK; static NSModule (*p)(NSObjectFileImage, const char*, unsigned long) = NULL; @@ -639,8 +842,11 @@ uint32_t NSSymbolDefinitionCountInObjectFileImage( NSObjectFileImage objectFileImage) { + if ( gUseDyld3 ) + return dyld3::NSSymbolDefinitionCountInObjectFileImage(objectFileImage); + DYLD_LOCK_THIS_BLOCK; - static unsigned long (*p)(NSObjectFileImage) = NULL; + static uint32_t (*p)(NSObjectFileImage) = NULL; if(p == NULL) _dyld_func_lookup("__dyld_NSSymbolDefinitionCountInObjectFileImage", (void**)&p); @@ -659,6 +865,9 @@ NSSymbolDefinitionNameInObjectFileImage( NSObjectFileImage objectFileImage, uint32_t ordinal) { + if ( gUseDyld3 ) + return dyld3::NSSymbolDefinitionNameInObjectFileImage(objectFileImage, ordinal); + DYLD_LOCK_THIS_BLOCK; static const char* (*p)(NSObjectFileImage, uint32_t) = NULL; @@ -676,8 +885,11 @@ uint32_t NSSymbolReferenceCountInObjectFileImage( NSObjectFileImage objectFileImage) { + if ( gUseDyld3 ) + return dyld3::NSSymbolReferenceCountInObjectFileImage(objectFileImage); + DYLD_LOCK_THIS_BLOCK; - static unsigned long (*p)(NSObjectFileImage) = NULL; + static uint32_t (*p)(NSObjectFileImage) = NULL; if(p == NULL) _dyld_func_lookup("__dyld_NSSymbolReferenceCountInObjectFileImage", (void**)&p); @@ -697,6 +909,9 @@ NSObjectFileImage objectFileImage, uint32_t ordinal, bool *tentative_definition) /* can be NULL */ { + if ( gUseDyld3 ) + return dyld3::NSSymbolReferenceNameInObjectFileImage(objectFileImage, ordinal, tentative_definition); + DYLD_LOCK_THIS_BLOCK; static const char* (*p)(NSObjectFileImage, uint32_t, bool*) = NULL; @@ -715,6 +930,9 @@ NSIsSymbolDefinedInObjectFileImage( NSObjectFileImage objectFileImage, const char* symbolName) { + if ( gUseDyld3 ) + return dyld3::NSIsSymbolDefinedInObjectFileImage(objectFileImage, symbolName); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(NSObjectFileImage, const char*) = NULL; @@ -738,6 +956,9 @@ const char* segmentName, const char* sectionName, unsigned long *size) /* can be NULL */ { + if ( gUseDyld3 ) + return dyld3::NSGetSectionDataInObjectFileImage(objectFileImage, segmentName, sectionName, size); + DYLD_LOCK_THIS_BLOCK; static void* (*p)(NSObjectFileImage, const char*, const char*, unsigned long*) = NULL; @@ -755,6 +976,9 @@ int *errorNumber, const char* *fileName, const char* *errorString) { + if ( gUseDyld3 ) + return dyld3::NSLinkEditError(c, errorNumber, fileName, errorString); + DYLD_LOCK_THIS_BLOCK; static void (*p)(NSLinkEditErrors *c, int *errorNumber, @@ -772,6 +996,9 @@ NSUnLinkModule( NSModule module, uint32_t options) { + if ( gUseDyld3 ) + return dyld3::NSUnLinkModule(module, options); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(NSModule module, uint32_t options) = NULL; @@ -809,7 +1036,10 @@ _NSGetExecutablePath( char *buf, uint32_t *bufsize) { - DYLD_LOCK_THIS_BLOCK; + if ( gUseDyld3 ) + return dyld3::_NSGetExecutablePath(buf, bufsize); + + DYLD_NO_LOCK_THIS_BLOCK; static int (*p)(char *buf, uint32_t *bufsize) = NULL; if(p == NULL) @@ -901,6 +1131,9 @@ void _dyld_register_func_for_add_image( void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide)) { + if ( gUseDyld3 ) + return dyld3::_dyld_register_func_for_add_image(func); + DYLD_LOCK_THIS_BLOCK; typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide); static void (*p)(callback_t func) = NULL; @@ -919,6 +1152,9 @@ void _dyld_register_func_for_remove_image( void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide)) { + if ( gUseDyld3 ) + return dyld3::_dyld_register_func_for_remove_image(func); + DYLD_LOCK_THIS_BLOCK; typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide); static void (*p)(callback_t func) = NULL; @@ -1002,21 +1238,6 @@ unsigned long *size) p(module, objc_module, size); } -/* - * _dyld_bind_objc_module() is passed a pointer to something in an (__OBJC, - * __module) section and causes the module that is associated with that address - * to be bound. - */ -void -_dyld_bind_objc_module(const void* objc_module) -{ - DYLD_LOCK_THIS_BLOCK; - static void (*p)(const void *objc_module) = NULL; - - if(p == NULL) - _dyld_func_lookup("__dyld_bind_objc_module", (void**)&p); - p(objc_module); -} #endif #if DEPRECATED_APIS_SUPPORTED @@ -1031,8 +1252,11 @@ _dyld_present(void) uint32_t _dyld_image_count(void) { + if ( gUseDyld3 ) + return dyld3::_dyld_image_count(); + DYLD_NO_LOCK_THIS_BLOCK; - static unsigned long (*p)(void) = NULL; + static uint32_t (*p)(void) = NULL; if(p == NULL) _dyld_func_lookup("__dyld_image_count", (void**)&p); @@ -1042,6 +1266,9 @@ _dyld_image_count(void) const struct mach_header * _dyld_get_image_header(uint32_t image_index) { + if ( gUseDyld3 ) + return dyld3::_dyld_get_image_header(image_index); + DYLD_NO_LOCK_THIS_BLOCK; static struct mach_header * (*p)(uint32_t image_index) = NULL; @@ -1053,6 +1280,9 @@ _dyld_get_image_header(uint32_t image_index) intptr_t _dyld_get_image_vmaddr_slide(uint32_t image_index) { + if ( gUseDyld3 ) + return dyld3::_dyld_get_image_vmaddr_slide(image_index); + DYLD_NO_LOCK_THIS_BLOCK; static unsigned long (*p)(uint32_t image_index) = NULL; @@ -1064,6 +1294,9 @@ _dyld_get_image_vmaddr_slide(uint32_t image_index) const char* _dyld_get_image_name(uint32_t image_index) { + if ( gUseDyld3 ) + return dyld3::_dyld_get_image_name(image_index); + DYLD_NO_LOCK_THIS_BLOCK; static const char* (*p)(uint32_t image_index) = NULL; @@ -1075,6 +1308,9 @@ _dyld_get_image_name(uint32_t image_index) // SPI in Mac OS X 10.6 intptr_t _dyld_get_image_slide(const struct mach_header* mh) { + if ( gUseDyld3 ) + return dyld3::_dyld_get_image_slide(mh); + DYLD_NO_LOCK_THIS_BLOCK; static intptr_t (*p)(const struct mach_header*) = NULL; @@ -1084,9 +1320,13 @@ intptr_t _dyld_get_image_slide(const struct mach_header* mh) } +#if DEPRECATED_APIS_SUPPORTED bool _dyld_image_containing_address(const void* address) { + if ( gUseDyld3 ) + return dyld3::_dyld_image_containing_address(address); + DYLD_LOCK_THIS_BLOCK; static bool (*p)(const void*) = NULL; @@ -1099,6 +1339,9 @@ const struct mach_header * _dyld_get_image_header_containing_address( const void* address) { + if ( gUseDyld3 ) + return dyld3::_dyld_get_image_header_containing_address(address); + DYLD_LOCK_THIS_BLOCK; static const struct mach_header * (*p)(const void*) = NULL; @@ -1107,19 +1350,6 @@ const void* address) return p(address); } -void _dyld_moninit( -void (*monaddition)(char *lowpc, char *highpc)) -{ - DYLD_LOCK_THIS_BLOCK; - typedef void (*monproc)(char *lowpc, char *highpc); - static void (*p)(monproc monaddition) = NULL; - - if(p == NULL) - _dyld_func_lookup("__dyld_moninit", (void**)&p); - p(monaddition); -} - -#if DEPRECATED_APIS_SUPPORTED bool _dyld_launched_prebound(void) { DYLD_LOCK_THIS_BLOCK; @@ -1158,12 +1388,12 @@ static bool dlerrorPerThreadKeyInitialized = false; // data kept per-thread struct dlerrorPerThreadData { - uint32_t sizeAllocated; + size_t sizeAllocated; char message[1]; }; // function called by dyld to get buffer to store dlerror message -static char* getPerThreadBufferFor_dlerror(uint32_t sizeRequired) +static char* getPerThreadBufferFor_dlerror(size_t sizeRequired) { // ok to create key lazily because this function is called within dyld lock, so there is no race condition if (!dlerrorPerThreadKeyInitialized ) { @@ -1172,11 +1402,11 @@ static char* getPerThreadBufferFor_dlerror(uint32_t sizeRequired) dlerrorPerThreadKeyInitialized = true; } - const int size = (sizeRequired < 256) ? 256 : sizeRequired; + const size_t size = (sizeRequired < 256) ? 256 : sizeRequired; dlerrorPerThreadData* data = (dlerrorPerThreadData*)pthread_getspecific(dlerrorPerThreadKey); if ( data == NULL ) { //int mallocSize = offsetof(dlerrorPerThreadData, message[size]); - const int mallocSize = sizeof(dlerrorPerThreadData)+size; + const size_t mallocSize = sizeof(dlerrorPerThreadData)+size; data = (dlerrorPerThreadData*)malloc(mallocSize); data->sizeAllocated = size; pthread_setspecific(dlerrorPerThreadKey, data); @@ -1184,7 +1414,7 @@ static char* getPerThreadBufferFor_dlerror(uint32_t sizeRequired) else if ( data->sizeAllocated < sizeRequired ) { free(data); //int mallocSize = offsetof(dlerrorPerThreadData, message[size]); - const int mallocSize = sizeof(dlerrorPerThreadData)+size; + const size_t mallocSize = sizeof(dlerrorPerThreadData)+size; data = (dlerrorPerThreadData*)malloc(mallocSize); data->sizeAllocated = size; pthread_setspecific(dlerrorPerThreadKey, data); @@ -1192,8 +1422,33 @@ static char* getPerThreadBufferFor_dlerror(uint32_t sizeRequired) return data->message; } +// dlerror buffer leak +// Only allocate buffer if an actual error message needs to be set +static bool hasPerThreadBufferFor_dlerror() +{ + if (!dlerrorPerThreadKeyInitialized ) + return false; + + return (pthread_getspecific(dlerrorPerThreadKey) != NULL); +} + +// use non-lazy pointer to vproc_swap_integer so that lazy binding does not recurse +typedef vproc_err_t (*vswapproc)(vproc_t vp, vproc_gsk_t key,int64_t *inval, int64_t *outval); +static vswapproc swapProc = &vproc_swap_integer; + +static bool isLaunchdOwned() +{ + static bool checked = false; + static bool result = false; + if ( !checked ) { + checked = true; + int64_t val = 0; + (*swapProc)(NULL, VPROC_GSK_IS_MANAGED, NULL, &val); + result = ( val != 0 ); + } + return result; +} -#if DYLD_SHARED_CACHE_SUPPORT static void shared_cache_missing() { // leave until dyld's that might call this are rare @@ -1203,24 +1458,24 @@ static void shared_cache_out_of_date() { // leave until dyld's that might call this are rare } -#endif // DYLD_SHARED_CACHE_SUPPORT -extern void* start; // the table passed to dyld containing thread helpers -static dyld::LibSystemHelpers sHelpers = { 9, &dyldGlobalLockAcquire, &dyldGlobalLockRelease, +static dyld::LibSystemHelpers sHelpers = { 13, &dyldGlobalLockAcquire, &dyldGlobalLockRelease, &getPerThreadBufferFor_dlerror, &malloc, &free, &__cxa_atexit, - #if DYLD_SHARED_CACHE_SUPPORT &shared_cache_missing, &shared_cache_out_of_date, - #else - NULL, NULL, - #endif NULL, NULL, &pthread_key_create, &pthread_setspecific, &malloc_size, &pthread_getspecific, &__cxa_finalize, - &start}; + address_of_start, + &hasPerThreadBufferFor_dlerror, + &isLaunchdOwned, + &vm_allocate, + &mmap, + &__cxa_finalize_ranges + }; // @@ -1228,23 +1483,28 @@ static dyld::LibSystemHelpers sHelpers = { 9, &dyldGlobalLockAcquire, &dyldGloba // and call dyld, registering the helper functions. // extern "C" void tlv_initializer(); -extern "C" void _dyld_initializer(); void _dyld_initializer() -{ - DYLD_LOCK_INITIALIZER; - +{ void (*p)(dyld::LibSystemHelpers*); - _dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p); - if(p != NULL) - p(&sHelpers); - + if ( gUseDyld3 ) { + dyld3::gAllImages.applyInitialImages(); + } + else { + _dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p); + if(p != NULL) + p(&sHelpers); + } + tlv_initializer(); } char* dlerror() { + if ( gUseDyld3 ) + return dyld3::dlerror(); + DYLD_LOCK_THIS_BLOCK; static char* (*p)() = NULL; @@ -1255,76 +1515,137 @@ char* dlerror() int dladdr(const void* addr, Dl_info* info) { + dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLADDR, (uint64_t)addr, 0, 0); + int result = 0; + if ( gUseDyld3 ) + return dyld3::dladdr(addr, info); + DYLD_LOCK_THIS_BLOCK; static int (*p)(const void* , Dl_info*) = NULL; if(p == NULL) _dyld_func_lookup("__dyld_dladdr", (void**)&p); - return(p(addr, info)); + result = p(addr, info); + timer.setData4(result); + timer.setData5(info != NULL ? info->dli_fbase : 0); + timer.setData6(info != NULL ? info->dli_saddr : 0); + return result; } int dlclose(void* handle) { + dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLCLOSE, (uint64_t)handle, 0, 0); + int result = 0; + if ( gUseDyld3 ) + return dyld3::dlclose(handle); + DYLD_LOCK_THIS_BLOCK; static int (*p)(void* handle) = NULL; if(p == NULL) _dyld_func_lookup("__dyld_dlclose", (void**)&p); - return(p(handle)); + result = p(handle); + return result; } void* dlopen(const char* path, int mode) -{ - // dlopen is special. locking is done inside dyld to allow initializer to run without lock - DYLD_NO_LOCK_THIS_BLOCK; - - static void* (*p)(const char* path, int) = NULL; +{ + dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLOPEN, path, mode, 0); + void* result = nullptr; + + if ( gUseDyld3 ) { + result = dyld3::dlopen_internal(path, mode, __builtin_return_address(0)); + return result; + } + + // dlopen is special. locking is done inside dyld to allow initializer to run without lock + DYLD_NO_LOCK_THIS_BLOCK; + + static void* (*p)(const char* path, int, void*) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_dlopen_internal", (void**)&p); + result = p(path, mode, __builtin_return_address(0)); + // use asm block to prevent tail call optimization + // this is needed because dlopen uses __builtin_return_address() and depends on this glue being in the frame chain + // + __asm__ volatile(""); + timer.setData4(result); + +#if TARGET_OS_OSX + // HACK for iOSMac bringup rdar://40945421 + if ( result == nullptr && dyld_get_active_platform() == PLATFORM_IOSMAC && csr_check(CSR_ALLOW_APPLE_INTERNAL) == 0) { + if (hasPerThreadBufferFor_dlerror()) { + // first char of buffer is flag whether string (starting at second char) is valid + char* buffer = getPerThreadBufferFor_dlerror(2); + + if ( buffer[0] != '\0' && (strstr(&buffer[1], "macOS dylib cannot be loaded into iOSMac process") + || strstr(&buffer[1], "mach-o, but not built for iOSMac")) ) { + // if valid buffer and contains an iOSMac issue + fprintf(stderr, "dyld: iOSMac ERROR: process attempted to dlopen() dylib with macOS dependency: \n"); + fprintf(stderr, "\tdlerror: %s\n", &buffer[1]); + fprintf(stderr, "\tBacktrace:\n"); + + void* stackPointers[128]; + int stackPointersCnt = backtrace(stackPointers, 128); + char** symbolicatedStack = backtrace_symbols(stackPointers, stackPointersCnt); + for (int32_t i = 0; i < stackPointersCnt; ++i) { + fprintf(stderr, "\t\t%s\n", symbolicatedStack[i]); + } + free(symbolicatedStack); + } + } + } +#endif - if(p == NULL) - _dyld_func_lookup("__dyld_dlopen", (void**)&p); - void* result = p(path, mode); - // use asm block to prevent tail call optimization - // this is needed because dlopen uses __builtin_return_address() and depends on this glue being in the frame chain - // - __asm__ volatile(""); - return result; } bool dlopen_preflight(const char* path) { - DYLD_LOCK_THIS_BLOCK; - static bool (*p)(const char* path) = NULL; + dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLOPEN_PREFLIGHT, path, 0, 0); + bool result = false; - if(p == NULL) - _dyld_func_lookup("__dyld_dlopen_preflight", (void**)&p); - return(p(path)); + if ( gUseDyld3 ) { + result = dyld3::dlopen_preflight_internal(path); + return result; + } + + DYLD_LOCK_THIS_BLOCK; + static bool (*p)(const char* path, void* callerAddress) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_dlopen_preflight_internal", (void**)&p); + result = p(path, __builtin_return_address(0)); + timer.setData4(result); + return result; } void* dlsym(void* handle, const char* symbol) { - DYLD_LOCK_THIS_BLOCK; - static void* (*p)(void* handle, const char* symbol) = NULL; + dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLSYM, handle, symbol, 0); + void* result = nullptr; - if(p == NULL) - _dyld_func_lookup("__dyld_dlsym", (void**)&p); - return(p(handle, symbol)); -} + if ( gUseDyld3 ) { + result = dyld3::dlsym_internal(handle, symbol, __builtin_return_address(0)); + return result; + } -void dyld_register_image_state_change_handler(dyld_image_states state, - bool batch, dyld_image_state_change_handler handler) -{ - DYLD_LOCK_THIS_BLOCK; - static void* (*p)(dyld_image_states, bool, dyld_image_state_change_handler) = NULL; + DYLD_LOCK_THIS_BLOCK; + static void* (*p)(void* handle, const char* symbol, void *callerAddress) = NULL; - if(p == NULL) - _dyld_func_lookup("__dyld_dyld_register_image_state_change_handler", (void**)&p); - p(state, batch, handler); + if(p == NULL) + _dyld_func_lookup("__dyld_dlsym_internal", (void**)&p); + result = p(handle, symbol, __builtin_return_address(0)); + timer.setData4(result); + return result; } - const struct dyld_all_image_infos* _dyld_get_all_image_infos() { + if ( gUseDyld3 ) + return dyld3::_dyld_get_all_image_infos(); + DYLD_NO_LOCK_THIS_BLOCK; static struct dyld_all_image_infos* (*p)() = NULL; @@ -1333,9 +1654,12 @@ const struct dyld_all_image_infos* _dyld_get_all_image_infos() return p(); } -#if !__arm__ +#if SUPPORT_ZERO_COST_EXCEPTIONS bool _dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info) { + if ( gUseDyld3 ) + return dyld3::_dyld_find_unwind_sections(addr, info); + DYLD_NO_LOCK_THIS_BLOCK; static void* (*p)(void*, dyld_unwind_sections*) = NULL; @@ -1346,7 +1670,7 @@ bool _dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info) #endif -#if __i386__ || __x86_64__ || __arm__ +#if __i386__ || __x86_64__ || __arm__ || __arm64__ __attribute__((visibility("hidden"))) void* _dyld_fast_stub_entry(void* loadercache, long lazyinfo) { @@ -1362,6 +1686,9 @@ void* _dyld_fast_stub_entry(void* loadercache, long lazyinfo) const char* dyld_image_path_containing_address(const void* addr) { + if ( gUseDyld3 ) + return dyld3::dyld_image_path_containing_address(addr); + DYLD_NO_LOCK_THIS_BLOCK; static const char* (*p)(const void*) = NULL; @@ -1370,9 +1697,25 @@ const char* dyld_image_path_containing_address(const void* addr) return p(addr); } -#if __IPHONE_OS_VERSION_MIN_REQUIRED +const struct mach_header* dyld_image_header_containing_address(const void* addr) +{ + if ( gUseDyld3 ) + return dyld3::dyld_image_header_containing_address(addr); + + DYLD_NO_LOCK_THIS_BLOCK; + static const mach_header* (*p)(const void*) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_get_image_header_containing_address", (void**)&p); + return p(addr); +} + + bool dyld_shared_cache_some_image_overridden() { + if ( gUseDyld3 ) + return dyld3::dyld_shared_cache_some_image_overridden(); + DYLD_NO_LOCK_THIS_BLOCK; static bool (*p)() = NULL; @@ -1380,12 +1723,105 @@ bool dyld_shared_cache_some_image_overridden() _dyld_func_lookup("__dyld_shared_cache_some_image_overridden", (void**)&p); return p(); } -#endif + +bool _dyld_get_shared_cache_uuid(uuid_t uuid) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_get_shared_cache_uuid(uuid); + + DYLD_NO_LOCK_THIS_BLOCK; + static bool (*p)(uuid_t) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_get_shared_cache_uuid", (void**)&p); + return p(uuid); +} + +const void* _dyld_get_shared_cache_range(size_t* length) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_get_shared_cache_range(length); + + DYLD_NO_LOCK_THIS_BLOCK; + static const void* (*p)(size_t*) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_get_shared_cache_range", (void**)&p); + return p(length); +} + +void _dyld_images_for_addresses(unsigned count, const void* addresses[], struct dyld_image_uuid_offset infos[]) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_images_for_addresses(count, addresses, infos); + + DYLD_NO_LOCK_THIS_BLOCK; + static const void (*p)(unsigned, const void*[], struct dyld_image_uuid_offset[]) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_images_for_addresses", (void**)&p); + return p(count, addresses, infos); +} + +void _dyld_register_for_image_loads(void (*func)(const mach_header* mh, const char* path, bool unloadable)) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_register_for_image_loads(func); + + DYLD_NO_LOCK_THIS_BLOCK; + static const void (*p)(void (*)(const mach_header* mh, const char* path, bool unloadable)) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_register_for_image_loads", (void**)&p); + return p(func); +} + +bool dyld_process_is_restricted() +{ + if ( gUseDyld3 ) + return dyld3::dyld_process_is_restricted(); + + DYLD_NO_LOCK_THIS_BLOCK; + static bool (*p)() = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_process_is_restricted", (void**)&p); + return p(); +} + +const char* dyld_shared_cache_file_path() +{ + if ( gUseDyld3 ) + return dyld3::dyld_shared_cache_file_path(); + + DYLD_NO_LOCK_THIS_BLOCK; + static const char* (*p)() = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_shared_cache_file_path", (void**)&p); + return p(); +} + +void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count) +{ + if ( gUseDyld3 ) + return dyld3::dyld_dynamic_interpose(mh, array, count); + + DYLD_LOCK_THIS_BLOCK; + static void (*p)(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count) = NULL; + + if (p == NULL) + _dyld_func_lookup("__dyld_dynamic_interpose", (void**)&p); + p(mh, array, count); +} // SPI called __fork void _dyld_fork_child() { + if ( gUseDyld3 ) + return dyld3::_dyld_fork_child(); + DYLD_NO_LOCK_THIS_BLOCK; static void (*p)() = NULL; @@ -1396,4 +1832,167 @@ void _dyld_fork_child() +static void* mapStartOfCache(const char* path, size_t length) +{ + struct stat statbuf; + if ( ::stat(path, &statbuf) == -1 ) + return NULL; + + if ( (size_t)statbuf.st_size < length ) + return NULL; + + int cache_fd = ::open(path, O_RDONLY); + if ( cache_fd < 0 ) + return NULL; + + void* result = ::mmap(NULL, length, PROT_READ, MAP_PRIVATE, cache_fd, 0); + close(cache_fd); + + if ( result == MAP_FAILED ) + return NULL; + + return result; +} + + +static const dyld_cache_header* findCacheInDirAndMap(const uuid_t cacheUuid, const char* dirPath) +{ + DIR* dirp = ::opendir(dirPath); + if ( dirp != NULL) { + dirent entry; + dirent* entp = NULL; + char cachePath[PATH_MAX]; + while ( ::readdir_r(dirp, &entry, &entp) == 0 ) { + if ( entp == NULL ) + break; + if ( entp->d_type != DT_REG ) + continue; + if ( strlcpy(cachePath, dirPath, PATH_MAX) >= PATH_MAX ) + continue; + if ( strlcat(cachePath, "/", PATH_MAX) >= PATH_MAX ) + continue; + if ( strlcat(cachePath, entp->d_name, PATH_MAX) >= PATH_MAX ) + continue; + if ( const dyld_cache_header* cacheHeader = (dyld_cache_header*)mapStartOfCache(cachePath, 0x00100000) ) { + if ( ::memcmp(cacheHeader->uuid, cacheUuid, 16) != 0 ) { + // wrong uuid, unmap and keep looking + ::munmap((void*)cacheHeader, 0x00100000); + } + else { + // found cache + closedir(dirp); + return cacheHeader; + } + } + } + closedir(dirp); + } + return NULL; +} + +int dyld_shared_cache_find_iterate_text(const uuid_t cacheUuid, const char* extraSearchDirs[], void (^callback)(const dyld_shared_cache_dylib_text_info* info)) +{ + if ( gUseDyld3 ) + return dyld3::dyld_shared_cache_find_iterate_text(cacheUuid, extraSearchDirs, callback); + + const dyld_cache_header* cacheHeader = NULL; + bool needToUnmap = true; + + // get info from dyld about this process, to see if requested cache is already mapped into this process + const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos(); + if ( (allInfo != NULL) && (allInfo->sharedCacheBaseAddress != 0) && (memcmp(allInfo->sharedCacheUUID, cacheUuid, 16) == 0) ) { + // requested cache is already mapped, just re-use it + cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress); + needToUnmap = false; + } + else { + // look first is default location for cache files + #if __IPHONE_OS_VERSION_MIN_REQUIRED + const char* defaultSearchDir = IPHONE_DYLD_SHARED_CACHE_DIR; + #else + const char* defaultSearchDir = MACOSX_DYLD_SHARED_CACHE_DIR; + #endif + cacheHeader = findCacheInDirAndMap(cacheUuid, defaultSearchDir); + // if not there, look in extra search locations + if ( cacheHeader == NULL ) { + for (const char** p = extraSearchDirs; *p != NULL; ++p) { + cacheHeader = findCacheInDirAndMap(cacheUuid, *p); + if ( cacheHeader != NULL ) + break; + } + } + } + + if ( cacheHeader == NULL ) + return -1; + + if ( cacheHeader->mappingOffset < sizeof(dyld_cache_header) ) { + // old cache without imagesText array + if ( needToUnmap ) + ::munmap((void*)cacheHeader, 0x00100000); + return -1; + } + + // walk imageText table and call callback for each entry + const dyld_cache_mapping_info* mappings = (dyld_cache_mapping_info*)((char*)cacheHeader + cacheHeader->mappingOffset); + const uint64_t cacheUnslidBaseAddress = mappings[0].address; + const dyld_cache_image_text_info* imagesText = (dyld_cache_image_text_info*)((char*)cacheHeader + cacheHeader->imagesTextOffset); + const dyld_cache_image_text_info* imagesTextEnd = &imagesText[cacheHeader->imagesTextCount]; + for (const dyld_cache_image_text_info* p=imagesText; p < imagesTextEnd; ++p) { + dyld_shared_cache_dylib_text_info dylibTextInfo; + dylibTextInfo.version = 2; + dylibTextInfo.loadAddressUnslid = p->loadAddress; + dylibTextInfo.textSegmentSize = p->textSegmentSize; + dylibTextInfo.path = (char*)cacheHeader + p->pathOffset; + ::memcpy(dylibTextInfo.dylibUuid, p->uuid, 16); + dylibTextInfo.textSegmentOffset = p->loadAddress - cacheUnslidBaseAddress; + callback(&dylibTextInfo); + } + + if ( needToUnmap ) + ::munmap((void*)cacheHeader, 0x00100000); + + return 0; +} + +int dyld_shared_cache_iterate_text(const uuid_t cacheUuid, void (^callback)(const dyld_shared_cache_dylib_text_info* info)) +{ + if ( gUseDyld3 ) + return dyld3::dyld_shared_cache_iterate_text(cacheUuid, callback); + + const char* extraSearchDirs[] = { NULL }; + return dyld_shared_cache_find_iterate_text(cacheUuid, extraSearchDirs, callback); +} + + +bool _dyld_is_memory_immutable(const void* addr, size_t length) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_is_memory_immutable(addr, length); + + DYLD_NO_LOCK_THIS_BLOCK; + static bool (*p)(const void*, size_t) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_is_memory_immutable", (void**)&p); + return p(addr, length); +} + + +void _dyld_objc_notify_register(_dyld_objc_notify_mapped mapped, + _dyld_objc_notify_init init, + _dyld_objc_notify_unmapped unmapped) +{ + if ( gUseDyld3 ) + return dyld3::_dyld_objc_notify_register(mapped, init, unmapped); + + DYLD_LOCK_THIS_BLOCK; + static bool (*p)(_dyld_objc_notify_mapped, _dyld_objc_notify_init, _dyld_objc_notify_unmapped) = NULL; + + if(p == NULL) + _dyld_func_lookup("__dyld_objc_notify_register", (void**)&p); + p(mapped, init, unmapped); +} + +