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/* $OpenBSD: crt0.c,v 1.6 2013/11/10 19:30:40 guenther Exp $ */
/* $NetBSD: crt0.c,v 1.10 2004/08/26 21:16:41 thorpej Exp $ */
/*
* Copyright (c) 1998 Christos Zoulas
* 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 for the
* NetBSD Project. See http://www.NetBSD.org/ for
* information about NetBSD.
* 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.
*
* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
*/
#include <sys/param.h>
#include <machine/asm.h>
#include <machine/fpu.h>
#include <stdlib.h>
static char *_strrchr(const char *, char);
char **environ;
char * __progname = "";
char __progname_storage[NAME_MAX+1];
#if defined(__SH4__) && !defined(__SH4_NOFPU__)
unsigned int __fpscr_values[2];
#endif
#ifdef MCRT0
extern void monstartup(u_long, u_long);
extern void _mcleanup(void);
extern unsigned char _etext, _eprol;
#endif /* MCRT0 */
void __start(int, char *[], char *[], void (*)(void));
void
__start(int argc, char **argv, char **envp, void (*cleanup)(void))
{
char *s;
#if defined(__SH4__) && !defined(__SH4_NOFPU__)
extern void __set_fpscr(unsigned int);
__set_fpscr(0);
__fpscr_values[0] |= FPSCR_DN;
__fpscr_values[1] |= FPSCR_DN;
__asm__ __volatile__ ("lds %0, fpscr" : : "r" (__fpscr_values[1]));
#endif
environ = envp;
if ((__progname = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(__progname, '/')) == NULL)
__progname = argv[0];
else
__progname++;
for (s = __progname_storage; *__progname &&
s < &__progname_storage[sizeof __progname_storage - 1]; )
*s++ = *__progname++;
*s = '\0';
__progname = __progname_storage;
}
if (cleanup)
atexit(cleanup);
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif /* MCRT0 */
#ifndef SCRT0
__init();
#endif
__asm("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(argc, argv, envp));
}
static char *
_strrchr(const char *p, char ch)
{
char *save;
for (save = NULL;; ++p) {
if (*p == ch)
save = (char *)p;
if (!*p)
return(save);
}
/* NOTREACHED */
}
asm (" .section \".text\" \n_eprol:");
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