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/* $OpenBSD: crt0.c,v 1.1 2011/07/04 05:42:11 pirofti Exp $ */
/*
* Copyright (c) 2011 Paul Irofti <pirofti@openbsd.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/exec.h>
#include <stdlib.h>
static char *_strrchr(char *, char);
char **environ;
char *__progname = "";
char __progname_storage[NAME_MAX+1];
#ifdef MCRT0
extern void monstartup(u_long, u_long);
extern void _mcleanup(void);
extern unsigned char _etext, _eprol;
#endif /* MCRT0 */
__asm ("1: \
{ .mii \
mov r15=@gprel(1b) \n \
mov r16=ip ;; \n \
sub gp=r16,r15 \n \
;; \
} ");
void
___start(int argc, char **argv, char **envp, void (*cleanup)(void),
const void *obj, struct ps_strings *ps_strings)
{
char *namep;
register struct kframe *kfp;
char *s;
environ = envp;
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(namep, '/')) == NULL)
__progname = namep;
else
++__progname;
for (s = __progname_storage; *__progname &&
s < &__progname_storage[sizeof __progname_storage - 1]; )
*s++ = *__progname++;
*s = '\0';
__progname = __progname_storage;
}
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
__init();
exit(main(argc, argv, environ));
}
static char *
_strrchr(p, ch)
register char *p, ch;
{
register char *save;
for (save = NULL;; ++p) {
if (*p == ch)
save = (char *)p;
if (!*p)
return(save);
}
/* NOTREACHED */
}
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif
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