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/* $OpenBSD: crt0.c,v 1.5 2001/08/12 12:03:01 heko Exp $ */
/* $NetBSD: crt0.c,v 1.20 1995/06/03 13:16:08 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 1.5 2001/08/12 12:03:01 heko Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <stdlib.h>
#include "common.h"
extern void start __P((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;
#ifdef lint
kfp = 0;
initcode = initcode = 0;
#else /* not lint */
/* just above the saved frame pointer */
asm ("lea 4(%%ebp), %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;
}
#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(" popl %ecx");
asm(" popl %eax");
asm(" pushl %ecx");
asm(" int $0x80");
asm(" pushl %ecx");
asm(" jc 1f");
asm(" ret");
asm(" 1:");
asm(" movl $-1,%eax");
asm(" ret");
#endif /* DYNAMIC */
#include "common.c"
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif
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