/* $OpenBSD: crt0.c,v 1.12 2003/11/22 00:50:48 avsm Exp $ */ /* $NetBSD: crt0.c,v 1.20 1995/06/03 13:16:08 pk Exp $ */ /* * Copyright (c) 1995 Christopher G. Demetriou * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou * for the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) static char rcsid[] = "$OpenBSD: crt0.c,v 1.12 2003/11/22 00:50:48 avsm Exp $"; #endif /* LIBC_SCCS and not lint */ #include <sys/param.h> #include <sys/exec.h> #include <stdlib.h> static char *_strrchr(char *, char); char **environ; char *__progname = ""; char __progname_storage[NAME_MAX+1]; #ifdef MCRT0 extern void monstartup(u_long, u_long); extern void _mcleanup(void); extern unsigned char _etext, _eprol; #endif /* MCRT0 */ __asm(".text\n" " .align 4\n" " .globl __start\n" " .globl _start\n" "_start:\n" "__start:\n" " pushl %ebx #ps_strings\n" " pushl %ecx # obj\n" " pushl %edx # cleanup\n" " movl 12(%esp),%eax\n" " leal 20(%esp,%eax,4),%ecx\n" " leal 16(%esp),%edx\n" " pushl %ecx\n" " pushl %edx\n" " pushl %eax\n" " call ___start "); void ___start(int argc, char **argv, char **envp, void (*cleanup)(void), const void *obj, struct ps_strings *ps_strings) { char *namep; register struct kframe *kfp; char *s; environ = envp; if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */ if ((__progname = _strrchr(namep, '/')) == NULL) __progname = namep; else ++__progname; for (s = __progname_storage; *__progname && s < &__progname_storage[sizeof __progname_storage - 1]; ) *s++ = *__progname++; *s = '\0'; __progname = __progname_storage; } #ifdef MCRT0 atexit(_mcleanup); monstartup((u_long)&_eprol, (u_long)&_etext); #endif __init(); exit(main(argc, argv, environ)); } static char * _strrchr(p, ch) register char *p, ch; { register char *save; for (save = NULL;; ++p) { if (*p == ch) save = (char *)p; if (!*p) return(save); } /* NOTREACHED */ } #ifdef MCRT0 asm (" .text"); asm ("_eprol:"); #endif