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/* $OpenBSD: crt0.c,v 1.9 2005/08/04 16:33:05 espie Exp $ */
/* $NetBSD: crt0.c,v 1.1.2.1 1995/10/15 19:40:04 ragge 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.
*
*/
#include <sys/param.h>
#include <stdlib.h>
#include "common.h"
extern void start(void) asm("start");
void
start()
{
struct kframe {
int kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
/*
* ALL REGISTER VARIABLES!!!
*/
register struct kframe *kfp;
register char **argv, *ap;
char *s;
#ifdef lint
kfp = 0;
initcode = initcode = 0;
#else /* not lint */
/* make kfp point to the arguments on stack */
asm ("movl sp, %0" : "=r" (kfp));
#endif /* not lint */
argv = &kfp->kargv[0];
environ = argv + kfp->kargc + 1;
if (ap = argv[0]) {
if ((__progname = _strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
for (s = __progname_storage; *__progname &&
s < &__progname_storage[sizeof __progname_storage - 1]; )
*s++ = *__progname++;
*s = '\0';
__progname = __progname_storage;
}
#ifdef DYNAMIC
/* ld(1) convention: if DYNAMIC = 0 then statically linked */
#ifdef stupid_gcc
if (&_DYNAMIC)
#else
if ( ({volatile caddr_t x = (caddr_t)&_DYNAMIC; x; }) )
#endif
__load_rtld(&_DYNAMIC);
#endif /* DYNAMIC */
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 DYNAMIC
asm(" ___syscall:");
asm(" .word 0"); /* no registers to save */
asm(" movl 4(ap), r0"); /* get syscall number */
asm(" subl3 $1,(ap)+,(ap)"); /* n-1 args to syscall */
asm(" chmk r0"); /* do system call */
asm(" jcs 1f"); /* check error */
asm(" ret"); /* return */
asm(" 1: movl $-1, r0");
asm(" ret");
#endif /* DYNAMIC */
#include "common.c"
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif
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