1 /* $OpenBSD: crt0.c,v 1.7 2016/05/07 19:30:53 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou 18 * for the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdlib.h> 35 #include <limits.h> 36 37 #include "md_init.h" 38 #ifdef MD_RCRT0_START 39 #include "boot.h" 40 #endif 41 42 /* some defaults */ 43 #ifndef MD_START_ARGS 44 #define MD_START_ARGS \ 45 int argc, char **argv, char **envp, void (*cleanup)(void) 46 #endif 47 #ifndef MD_START 48 #define MD_START ___start 49 static void ___start(MD_START_ARGS) __used; 50 #endif 51 #ifndef MD_EPROL_LABEL 52 #define MD_EPROL_LABEL __asm(" .text\n_eprol:") 53 #endif 54 55 char ***_csu_finish(char **_argv, char **_envp, void (*_cleanup)(void)); 56 57 #ifdef MCRT0 58 #include <sys/gmon.h> 59 extern unsigned char _etext, _eprol; 60 #endif /* MCRT0 */ 61 62 #ifdef RCRT0 63 #ifdef MD_RCRT0_START 64 MD_RCRT0_START; 65 #endif 66 #else 67 #ifdef MD_CRT0_START 68 MD_CRT0_START; 69 #endif 70 #endif 71 72 void 73 MD_START(MD_START_ARGS) 74 { 75 char ***environp; 76 #ifdef MD_START_SETUP 77 MD_START_SETUP 78 #endif 79 80 #ifndef MD_NO_CLEANUP 81 environp = _csu_finish(argv, envp, cleanup); 82 #else 83 environp = _csu_finish(argv, envp, NULL); 84 #endif 85 86 #ifdef MCRT0 87 atexit(_mcleanup); 88 _monstartup((u_long)&_eprol, (u_long)&_etext); 89 #endif 90 91 __init(); 92 93 exit(main(argc, argv, *environp)); 94 } 95 96 #ifdef MCRT0 97 MD_EPROL_LABEL; 98 #endif 99