crt0.c revision 1.6 
1/*	$OpenBSD: crt0.c,v 1.6 2016/03/20 02:32:39 guenther Exp $	*/
2
3/*
4 * Copyright (c) 1995 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christopher G. Demetriou
18 *	for the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <stdlib.h>
35#include <limits.h>
36
37#include "md_init.h"
38#ifdef MD_RCRT0_START
39#include "boot.h"
40#endif
41
42/* some defaults */
43#ifndef	MD_START_ARGS
44#define	MD_START_ARGS	\
45	int argc, char **argv, char **envp, void (*cleanup)(void)
46#endif
47#ifndef MD_START
48#define	MD_START	___start
49static void		___start(MD_START_ARGS) __used;
50#endif
51#ifndef	MD_EPROL_LABEL
52#define	MD_EPROL_LABEL	__asm("  .text\n_eprol:")
53#endif
54
55char	***_csu_finish(char **_argv, char **_envp, void (*_cleanup)(void));
56
57#ifdef MCRT0
58extern void	monstartup(u_long, u_long);
59extern void	_mcleanup(void);
60extern unsigned char _etext, _eprol;
61#endif /* MCRT0 */
62
63#ifdef RCRT0
64#ifdef MD_RCRT0_START
65MD_RCRT0_START;
66#endif
67#else
68#ifdef MD_CRT0_START
69MD_CRT0_START;
70#endif
71#endif
72
73void
74MD_START(MD_START_ARGS)
75{
76	char ***environp;
77#ifdef MD_START_SETUP
78	MD_START_SETUP
79#endif
80
81#ifndef MD_NO_CLEANUP
82	environp = _csu_finish(argv, envp, cleanup);
83#else
84	environp = _csu_finish(argv, envp, NULL);
85#endif
86
87#ifdef MCRT0
88	atexit(_mcleanup);
89	monstartup((u_long)&_eprol, (u_long)&_etext);
90#endif
91
92	__init();
93
94	exit(main(argc, argv, *environp));
95}
96
97#ifdef MCRT0
98MD_EPROL_LABEL;
99#endif
100