1 /* $NetBSD: initfini.c,v 1.9 2011/03/09 23:10:06 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 1.9 2011/03/09 23:10:06 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 <sys/tls.h> 42 #include <stdbool.h> 43 44 void _libc_init(void) __attribute__((__constructor__, __used__)); 45 46 void __guard_setup(void); 47 void __libc_thr_init(void); 48 void __libc_atomic_init(void); 49 void __libc_atexit_init(void); 50 void __libc_env_init(void); 51 52 #if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) 53 __dso_hidden void __libc_static_tls_setup(void); 54 #endif 55 56 static bool libc_initialised; 57 58 void _libc_init(void); 59 60 __dso_hidden void *__auxinfo; 61 struct ps_strings *__ps_strings; 62 63 /* 64 * _libc_init is called twice. The first time explicitly by crt0.o 65 * (for newer versions) and the second time as indirectly via _init(). 66 */ 67 void 68 _libc_init(void) 69 { 70 71 if (libc_initialised) 72 return; 73 74 libc_initialised = 1; 75 76 if (__ps_strings != NULL) 77 __auxinfo = __ps_strings->ps_argvstr + 78 __ps_strings->ps_nargvstr + __ps_strings->ps_nenvstr + 2; 79 80 /* For -fstack-protector */ 81 __guard_setup(); 82 83 /* Atomic operations */ 84 __libc_atomic_init(); 85 86 #if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) 87 /* Initialize TLS for statically linked programs. */ 88 __libc_static_tls_setup(); 89 #endif 90 91 /* Threads */ 92 __libc_thr_init(); 93 94 /* Initialize the atexit mutexes */ 95 __libc_atexit_init(); 96 97 /* Initialize environment memory RB tree. */ 98 __libc_env_init(); 99 } 100