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/* $OpenBSD: crt0.c,v 1.4 1999/08/20 14:11:35 niklas Exp $ */
/* $NetBSD: crt0.c,v 1.7 1995/06/03 13:16:15 pk Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* 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 Paul Kranenburg.
* 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 1.4 1999/08/20 14:11:35 niklas Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
extern void start __P((long)) asm("start");
extern void _mcleanup __P((void));
extern unsigned char eprol asm ("eprol");
extern unsigned char etext;
char **environ;
static char empty[1];
char *__progname = empty;
void
__start()
{
struct kframe {
int kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
register struct kframe *kfp;
register char **argv, *ap;
#ifndef DYNAMIC
asm(" la $28,_gp");
asm(" addiu %0,$29,32" : "=r" (kfp));
#else
asm(" addiu %0,$29,48" : "=r" (kfp));
#endif
/* just above the saved frame pointer
kfp = (struct kframe *) (¶m-1);*/
argv = &kfp->kargv[0];
environ = argv + kfp->kargc + 1;
if (ap = argv[0])
if ((__progname = strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
asm("eprol:");
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif MCRT0
asm ("_callmain:"); /* Defined for the benefit of debuggers */
exit(main(kfp->kargc, argv, environ));
}
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif
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