/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2009-2010 Apple 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@ */ #include <Availability.h> #include <stddef.h> #include <TargetConditionals.h> // // This is the temporary private interface between libSystem.B.dylib and dyld // int NXArgc = 0; const char** NXArgv = NULL; const char** environ = NULL; const char* __progname = NULL; // // Long ago, the compiler driver added -ldylib1.o to every dylib which caused a // __DATA,__dyld section to be added every dylib. The new LINKEDIT format no longer requires // images to have a __DATA,__dyld section. But until libdyld.dylib and dyld update // to some sort of vtable based interface, libdyld still needs a __DATA,__dyld section. // The code below adds that section. // struct __DATA__dyld { long lazy; int (*lookup)(const char*, void**); // ProgramVars const void* mh; int* NXArgcPtr; const char*** NXArgvPtr; const char*** environPtr; const char** __prognamePtr; }; static volatile struct __DATA__dyld myDyldSection __attribute__ ((section ("__DATA,__dyld"))) = { 0, 0, NULL, &NXArgc, &NXArgv, &environ, &__progname }; #if __arm__ && __MAC_OS_X_VERSION_MIN_REQUIRED // <rdar://problem/8755380> // For historical reasons, gcc and llvm-gcc added -ldylib1.o to the link line of armv6 // dylibs when targeting MacOSX (but not iOS). clang cleans up that mistake, but doing // so would break the libdyld build. Making _dyld_func_lookup weak,hidden means if // dylib1.o is used, it overrides this, otherwise this implementation is used. __attribute__((weak)) #endif __attribute__((visibility("hidden"))) int _dyld_func_lookup(const char* dyld_func_name, void **address) { return (*myDyldSection.lookup)(dyld_func_name, address); }