/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This 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 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 STRINGIFY(a) # a #define DECLARE_VAR(var, type) \ static type * var ## _pointer = 0 #define SETUP_VAR(var) \ if ( var ## _pointer == 0) { \ _dyld_lookup_and_bind( STRINGIFY(_ ## var), \ (unsigned long *) & var ## _pointer, 0); \ } #define USE_VAR(var) (var ## _pointer) #else #define DECLARE_VAR(var, type) extern type var #define SETUP_VAR(var) #define USE_VAR(var) (& var) #endif char ***_NSGetArgv(void) { DECLARE_VAR(NXArgv, char **); SETUP_VAR(NXArgv); return(USE_VAR(NXArgv)); } int *_NSGetArgc(void) { DECLARE_VAR(NXArgc, int); SETUP_VAR(NXArgc); return(USE_VAR(NXArgc)); } char ***_NSGetEnviron(void) { DECLARE_VAR(environ, char **); SETUP_VAR(environ); return(USE_VAR(environ)); } struct mach_header *_NSGetMachExecuteHeader(void) { DECLARE_VAR(_mh_execute_header, struct mach_header); SETUP_VAR(_mh_execute_header); return(USE_VAR(_mh_execute_header)); } /* * 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; void *__keymgr_global[3] = { (void *)0 };