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crtbegin.c revision 1.4 
      1 /*-
      2  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Matt Thomas of 3am Software Foundry.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 #include <sys/cdefs.h>
     30 __RCSID("$NetBSD: crtbegin.c,v 1.4 2013/08/19 22:15:13 matt Exp $");
     31 
     32 typedef void (*fptr_t)(void);
     33 
     34 __dso_hidden const fptr_t __JCR_LIST__[0] __section(".jcr");
     35 
     36 __weakref_visible void Jv_RegisterClasses(const fptr_t *)
     37 	__weak_reference(_Jv_RegisterClasses);
     38 
     39 #if !defined(HAVE_INITFINI_ARRAY)
     40 __dso_hidden const fptr_t __CTOR_LIST__[] __section(".ctors") = {
     41 	(fptr_t) -1,
     42 };
     43 __dso_hidden extern const fptr_t __CTOR_LIST_END__[];
     44 #endif
     45 
     46 #ifdef SHARED
     47 __dso_hidden void *__dso_handle = &__dso_handle;
     48 
     49 __weakref_visible void cxa_finalize(void *)
     50 	__weak_reference(__cxa_finalize);
     51 #else
     52 __dso_hidden void *__dso_handle;
     53 #endif
     54 
     55 #if !defined(__ARM_EABI__)
     56 __dso_hidden const long __EH_FRAME_LIST__[0] __section(".eh_frame");
     57 
     58 __weakref_visible void register_frame_info(const void *, const void *)
     59 	__weak_reference(__register_frame_info);
     60 __weakref_visible void deregister_frame_info(const void *)
     61 	__weak_reference(__deregister_frame_info);
     62 
     63 static long dwarf_eh_object[8];
     64 #endif
     65 
     66 static void __do_global_ctors_aux(void) __used;
     67 
     68 static void __section(".text.startup")
     69 __do_global_ctors_aux(void)
     70 {
     71 	static unsigned char __initialized;
     72 
     73 	if (__initialized)
     74 		return;
     75 
     76 	__initialized = 1;
     77 
     78 #if !defined(__ARM_EABI__)
     79 	if (register_frame_info)
     80 		register_frame_info(__EH_FRAME_LIST__, &dwarf_eh_object);
     81 #endif
     82 
     83 	if (Jv_RegisterClasses && __JCR_LIST__[0] != 0)
     84 		Jv_RegisterClasses(__JCR_LIST__);
     85 
     86 #if !defined(HAVE_INITFINI_ARRAY)
     87 	for (const fptr_t *p = __CTOR_LIST_END__; p > __CTOR_LIST__ + 1; ) {
     88 		(*(*--p))();
     89 	}
     90 #endif
     91 }
     92 
     93 #if !defined(__ARM_EABI__) || defined(SHARED)
     94 #if !defined(HAVE_INITFINI_ARRAY)
     95 __dso_hidden const fptr_t __DTOR_LIST__[] __section(".dtors") = {
     96 	(fptr_t) -1,
     97 };
     98 __dso_hidden extern const fptr_t __DTOR_LIST_END__[];
     99 #endif
    100 
    101 static void __do_global_dtors_aux(void) __used;
    102 
    103 static void __section(".text.exit")
    104 __do_global_dtors_aux(void)
    105 {
    106 	static unsigned char __finished;
    107 
    108 	if (__finished)
    109 		return;
    110 
    111 	__finished = 1;
    112 
    113 #ifdef SHARED
    114 	if (cxa_finalize)
    115 		(*cxa_finalize)(__dso_handle);
    116 #endif
    117 
    118 #if !defined(HAVE_INITFINI_ARRAY)
    119 	for (const fptr_t *p = __DTOR_LIST__ + 1; p < __DTOR_LIST_END__; ) {
    120 		(*(*p++))();
    121 	}
    122 #endif
    123 
    124 #if !defined(__ARM_EABI__)
    125 	if (deregister_frame_info)
    126 		deregister_frame_info(__EH_FRAME_LIST__);
    127 #endif
    128 }
    129 #endif /* !__ARM_EABI__ || SHARED */
    130 
    131 #include "crtbegin.h"
    132