/* * Copyright (c) 1999-2007 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@ */ /* ** This file contains interfaces to the symbols defined int the crt modules. ** 3 April 1995 ** Matt Watson (mwatson@next.com) ** */ #if defined(__DYNAMIC__) #include "mach-o/dyld.h" /* defines _dyld_lookup_and_bind() */ #define DECLARE_VAR(var, type) \ static type * var ## _pointer = 0 #define DECLARE_PROGNAME(var, type) \ static type * var ## _pointer = 0; \ __unused static type _priv_ ## var = 0 #define USE_VAR(var) (var ## _pointer) #else #define DECLARE_VAR(var, type) extern type var #define DECLARE_PROGNAME(var, type) DECLARE_VAR(var, type) #define USE_VAR(var) (& var) #endif DECLARE_VAR(NXArgv, char **); DECLARE_VAR(NXArgc, int); DECLARE_VAR(environ, char **); DECLARE_VAR(_mh_execute_header, struct mach_header); DECLARE_PROGNAME(__progname, char *); char ***_NSGetArgv(void) { return(USE_VAR(NXArgv)); } int *_NSGetArgc(void) { return(USE_VAR(NXArgc)); } char ***_NSGetEnviron(void) { return(USE_VAR(environ)); } char **_NSGetProgname(void) { return(USE_VAR(__progname)); } struct mach_header *_NSGetMachExecuteHeader(void) { return(USE_VAR(_mh_execute_header)); } #if __DYNAMIC__ struct ProgramVars { void* mh; int* NXArgcPtr; char*** NXArgvPtr; char*** environPtr; char** __prognamePtr; }; #define SUPPORT_PRE_GM_10_5_EXECUTABLES (__ppc__ || __i386__) /* * dyld calls libSystem_initializer() and passes it a ProgramVars struct * containing pointers to the main executable's NXArg* global variables. * libSystem_initializer() calls _libc_initializer() which calls * _program_vars_init() passing the ProgramVars parameter. */ void __attribute__((visibility("hidden"))) _program_vars_init(const struct ProgramVars* vars) { #if SUPPORT_PRE_GM_10_5_EXECUTABLES // to support transitional 10.5 main executables that don't have extended __dyld section and instead call _NSSetProgramVars, // don't overwrite values set by _NSSetProgramVars() if ( NXArgv_pointer != NULL ) return; #endif NXArgv_pointer = vars->NXArgvPtr; NXArgc_pointer = vars->NXArgcPtr; environ_pointer = vars->environPtr; __progname_pointer = vars->__prognamePtr; _mh_execute_header_pointer = vars->mh; } #if SUPPORT_PRE_GM_10_5_EXECUTABLES /* * This is only called by main executables built with pre 10-5 GM crt1.10.5.o. In those programs, * there is no extended __dyld section, dyld cannot tell _program_vars_init() where the real program * variables are, so they get temp values and are set for real here. */ void _NSSetProgramVars(int* crt_argc, char*** crt_argv, char*** crt_environ, struct mach_header* crt_mh, char** crt_progname) { NXArgv_pointer = crt_argv; NXArgc_pointer = crt_argc; environ_pointer = crt_environ; __progname_pointer = crt_progname; _mh_execute_header_pointer = crt_mh; } #endif #endif /* __DYNAMIC__ */ #if __ppc__ /* * Fix for Radar bug 2200596 -- * EH symbol definitions for gcc 2.7.2.x implementation of * C++ exception handling. The problem: the EH implementation * has "throw" store stuff into these pointers, and then as the * stack is unwound, the code generated into each function (for * checking whether this function contains a relevant "catch" * clause and for calling destructors for local variables) looks * at these globals to find the type and value thrown. * * The problem was that the compiler generated the symbols as * "common" symbols, and common symbols cannot be placed in * dynamic shared libraries. So we must put these guys as * "data" symbols into crt0.o or the System Framework (library), * and the compiler must generate code that defines the symbols * as external references instead of common. * * I changed the symbol names (added the "_272") to be utterly * paranoid about any possible future use of similar names by * any future versions of gcc. * -- D. Landauer, Jan. 1998 */ void *__eh_pc_gcc_272 = (void *)0; void *__eh_type_gcc_272 = (void *)0; void *__eh_value_gcc_272 = (void *)0; /* This is what egcs uses for its global data pointer */ void *__eh_global_dataptr = (void *)0; #endif /* __ppc__ */