initfini.c revision 1.8 
1/* 	$NetBSD: initfini.c,v 1.8 2011/03/07 05:09:11 joerg Exp $	 */
2
3/*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__RCSID("$NetBSD: initfini.c,v 1.8 2011/03/07 05:09:11 joerg Exp $");
34
35#ifdef _LIBC
36#include "namespace.h"
37#endif
38
39#include <sys/param.h>
40#include <sys/exec.h>
41#include <stdbool.h>
42
43void	_libc_init(void) __attribute__((__constructor__, __used__));
44
45void	__guard_setup(void);
46void	__libc_thr_init(void);
47void	__libc_atomic_init(void);
48void	__libc_atexit_init(void);
49void	__libc_env_init(void);
50
51static bool libc_initialised;
52
53void _libc_init(void);
54
55__dso_hidden void	*__auxinfo;
56struct ps_strings *__ps_strings;
57
58/*
59 * _libc_init is called twice.  The first time explicitly by crt0.o
60 * (for newer versions) and the second time as indirectly via _init().
61 */
62void
63_libc_init(void)
64{
65
66	if (libc_initialised)
67		return;
68
69	libc_initialised = 1;
70
71	if (__ps_strings != NULL)
72		__auxinfo = __ps_strings->ps_argvstr +
73		    __ps_strings->ps_nargvstr + __ps_strings->ps_nenvstr + 2;
74
75	/* For -fstack-protector */
76	__guard_setup();
77
78	/* Atomic operations */
79	__libc_atomic_init();
80
81	/* Threads */
82	__libc_thr_init();
83
84	/* Initialize the atexit mutexes */
85	__libc_atexit_init();
86
87	/* Initialize environment memory RB tree. */
88	__libc_env_init();
89}
90