lib/csu/common/crtbegin.c

   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 1.6 2013/11/29 23:00:48 joerg Exp $");
  31
  32 #include "crtbegin.h"
  33
  34 typedef void (*fptr_t)(void);
  35
  36 __dso_hidden const fptr_t __JCR_LIST__[0] __section(".jcr");
  37
  38 __weakref_visible void Jv_RegisterClasses(const fptr_t *)
  39         __weak_reference(_Jv_RegisterClasses);
  40
  41 #if !defined(HAVE_INITFINI_ARRAY)
  42 __dso_hidden const fptr_t __CTOR_LIST__[] __section(".ctors") = {
  43         (fptr_t) -1,
  44 };
  45 __dso_hidden extern const fptr_t __CTOR_LIST_END__[];
  46 #endif
  47
  48 #ifdef SHARED
  49 __dso_hidden void *__dso_handle = &__dso_handle;
  50
  51 __weakref_visible void cxa_finalize(void *)
  52         __weak_reference(__cxa_finalize);
  53 #else
  54 __dso_hidden void *__dso_handle;
  55 #endif
  56
  57 #if !defined(__ARM_EABI__)
  58 __dso_hidden
  59 #if !defined(__mips__)
  60         const
  61 #endif
  62         long __EH_FRAME_LIST__[0] __section(".eh_frame");
  63
  64 __weakref_visible void register_frame_info(const void *, const void *)
  65         __weak_reference(__register_frame_info);
  66 __weakref_visible void deregister_frame_info(const void *)
  67         __weak_reference(__deregister_frame_info);
  68
  69 static long dwarf_eh_object[8];
  70 #endif
  71
  72 static void __do_global_ctors_aux(void) __used;
  73
  74 static void __section(".text.startup")
  75 __do_global_ctors_aux(void)
  76 {
  77         static unsigned char __initialized;
  78
  79         if (__initialized)
  80                 return;
  81
  82         __initialized = 1;
  83
  84 #if !defined(__ARM_EABI__)
  85         if (register_frame_info)
  86                 register_frame_info(__EH_FRAME_LIST__, &dwarf_eh_object);
  87 #endif
  88
  89         if (Jv_RegisterClasses && __JCR_LIST__[0] != 0)
  90                 Jv_RegisterClasses(__JCR_LIST__);
  91
  92 #if !defined(HAVE_INITFINI_ARRAY)
  93         for (const fptr_t *p = __CTOR_LIST_END__; p > __CTOR_LIST__ + 1; ) {
  94                 (*(*--p))();
  95         }
  96 #endif
  97 }
  98
  99 #if !defined(__ARM_EABI__) || defined(SHARED)
 100 #if !defined(HAVE_INITFINI_ARRAY)
 101 __dso_hidden const fptr_t __DTOR_LIST__[] __section(".dtors") = {
 102         (fptr_t) -1,
 103 };
 104 __dso_hidden extern const fptr_t __DTOR_LIST_END__[];
 105 #endif
 106
 107 static void __do_global_dtors_aux(void) __used;
 108
 109 static void __section(".text.exit")
 110 __do_global_dtors_aux(void)
 111 {
 112         static unsigned char __finished;
 113
 114         if (__finished)
 115                 return;
 116
 117         __finished = 1;
 118
 119 #ifdef SHARED
 120         if (cxa_finalize)
 121                 (*cxa_finalize)(__dso_handle);
 122 #endif
 123
 124 #if !defined(HAVE_INITFINI_ARRAY)
 125         for (const fptr_t *p = __DTOR_LIST__ + 1; p < __DTOR_LIST_END__; ) {
 126                 (*(*p++))();
 127         }
 128 #endif
 129
 130 #if !defined(__ARM_EABI__)
 131         if (deregister_frame_info)
 132                 deregister_frame_info(__EH_FRAME_LIST__);
 133 #endif
 134 }
 135 #endif /* !__ARM_EABI__ || SHARED */