crt1.c revision 232580 
1/*-
2 * Copyright 1996-1998 John D. Polstra.
3 * All rights reserved.
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 * $FreeBSD: head/lib/csu/mips/crt1.c 232580 2012-03-06 03:29:46Z gonzo $
34 */
35
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/lib/csu/mips/crt1.c 232580 2012-03-06 03:29:46Z gonzo $");
38
39#ifndef __GNUC__
40#error "GCC is needed to compile this file"
41#endif
42
43#include <stdlib.h>
44#include "libc_private.h"
45#include "crtbrand.c"
46
47struct Struct_Obj_Entry;
48struct ps_strings;
49
50extern int _DYNAMIC;
51#pragma weak _DYNAMIC
52
53extern void _init(void);
54extern void _fini(void);
55extern int main(int, char **, char **);
56
57#ifdef GCRT
58extern void _mcleanup(void);
59extern void monstartup(void *, void *);
60extern int eprol;
61extern int etext;
62#endif
63
64char **environ;
65const char *__progname = "";
66
67void __start(char **, void (*)(void), struct Struct_Obj_Entry *, struct ps_strings *);
68
69/* The entry function. */
70void
71__start(char **ap,
72	void (*cleanup)(void),			/* from shared loader */
73	struct Struct_Obj_Entry *obj __unused,	/* from shared loader */
74	struct ps_strings *ps_strings __unused)
75{
76	int argc;
77	char **argv;
78	char **env;
79
80	argc = * (long *) ap;
81	argv = ap + 1;
82	env  = ap + 2 + argc;
83	environ = env;
84	if (argc > 0 && argv[0] != NULL) {
85		const char *s;
86		__progname = argv[0];
87		for (s = __progname; *s != '\0'; s++)
88			if (*s == '/')
89				__progname = s + 1;
90	}
91
92	if (&_DYNAMIC != NULL)
93		atexit(cleanup);
94	else
95		_init_tls();
96
97#ifdef GCRT
98	atexit(_mcleanup);
99#endif
100	atexit(_fini);
101#ifdef GCRT
102	monstartup(&eprol, &etext);
103#endif
104#ifndef NOGPREL
105	_init();
106#endif
107	exit( main(argc, argv, env) );
108}
109
110#ifdef GCRT
111__asm__(".text");
112__asm__("eprol:");
113__asm__(".previous");
114#endif
115