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/* $OpenBSD: crt0.c,v 1.4 2014/12/27 16:04:22 kettenis Exp $ */
/*
* 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 by Christopher G. Demetriou
* for the NetBSD Project.
* 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 <stdlib.h>
#include <limits.h>
#include "md_init.h"
#ifdef MD_RCRT0_START
#include "boot.h"
#endif
/* some defaults */
#ifndef MD_START_ARGS
#define MD_START_ARGS \
int argc, char **argv, char **envp, void (*cleanup)(void)
#endif
#ifndef MD_START
#define MD_START ___start
static void ___start(MD_START_ARGS) __used;
#endif
#ifndef MD_EPROL_LABEL
#define MD_EPROL_LABEL __asm(" .text\n_eprol:")
#endif
void __init_tcb(char **_envp);
#pragma weak __init_tcb
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 */
#ifdef RCRT0
#ifdef MD_RCRT0_START
MD_RCRT0_START;
#endif
#else
#ifdef MD_CRT0_START
MD_CRT0_START;
#endif
#endif
void
MD_START(MD_START_ARGS)
{
char *namep, *s;
#ifdef MD_START_SETUP
MD_START_SETUP
#endif
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;
}
#ifndef MD_NO_CLEANUP
if (cleanup != NULL)
atexit(cleanup);
else
#endif
if (__init_tcb != NULL)
__init_tcb(envp);
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
__init();
exit(main(argc, argv, envp));
}
static char *
_strrchr(char *p, char ch)
{
char *save;
for (save = NULL;; ++p) {
if (*p == ch)
save = p;
if (*p == '\0')
return (save);
}
}
#ifdef MCRT0
MD_EPROL_LABEL;
#endif
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