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/* $OpenBSD: crt0.c,v 1.7 2004/01/04 20:05:38 pvalchev Exp $ */
/*
* Mach Operating System
* Copyright (c) 1991, 1992 Carnegie Mellon University
* Copyright (c) 1991, 1992 Omron Corporation
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: crt0.c,v 1.7 2004/01/04 20:05:38 pvalchev Exp $";
#endif /* LIBC_SCCS and not lint */
/*
* When a program begins, r31 points to a structure passed by the kernel.
*
* This structure contains argc, the argv[] NULL-terminated array, and
* the envp[] NULL-terminated array.
*/
#include <stdlib.h>
#include "common.h"
struct kframe {
int argc;
char *argv[0];
};
__asm__ (
" .text\n"
" .align 8\n"
" .globl start\n"
"start:\n"
" br.n _start\n"
" or r2, r31, r0\n"
);
static void
start(struct kframe *kfp)
{
char **argv, *ap, *s;
argv = &kfp->argv[0];
environ = argv + kfp->argc + 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;
}
asm ("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(kfp->argc, argv, environ));
}
#include "common.c"
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