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 1.17 2018/12/28 18:17:11 christos 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 extern __dso_hidden const fptr_t __CTOR_LIST__start __asm("__CTOR_LIST__");
43
44 __dso_hidden const fptr_t __aligned(sizeof(void *)) __CTOR_LIST__[] __section(".ctors") = {
45 (fptr_t) -1,
46 };
47 __dso_hidden extern const fptr_t __CTOR_LIST_END__[];
48 #endif
49
50 #ifdef SHARED
51 __dso_hidden void *__dso_handle = &__dso_handle;
52
53 __weakref_visible void cxa_finalize(void *)
54 __weak_reference(__cxa_finalize);
55 #else
56 __dso_hidden void *__dso_handle;
57 #endif
58
59 #if !defined(__ARM_EABI__) || defined(__ARM_DWARF_EH__)
60 __dso_hidden const long __EH_FRAME_LIST__[0] __section(".eh_frame");
61
62 __weakref_visible void register_frame_info(const void *, const void *)
63 __weak_reference(__register_frame_info);
64 __weakref_visible void deregister_frame_info(const void *)
65 __weak_reference(__deregister_frame_info);
66
67 static long dwarf_eh_object[8];
68 #endif
69
70 static void __do_global_ctors_aux(void) __used;
71
72 static void __section(".text.startup")
__do_global_ctors_aux(void)73 __do_global_ctors_aux(void)
74 {
75 static unsigned char __initialized;
76
77 if (__initialized)
78 return;
79
80 __initialized = 1;
81
82 #if !defined(__ARM_EABI__) || defined(__ARM_DWARF_EH__)
83 if (register_frame_info)
84 register_frame_info(__EH_FRAME_LIST__, &dwarf_eh_object);
85 #endif
86
87 if (Jv_RegisterClasses && __JCR_LIST__[0] != 0)
88 Jv_RegisterClasses(__JCR_LIST__);
89
90 #if !defined(HAVE_INITFINI_ARRAY)
91 for (const fptr_t *p = __CTOR_LIST_END__; p > &__CTOR_LIST__start + 1; ) {
92 (*(*--p))();
93 }
94 #endif
95 }
96
97 #if !defined(__ARM_EABI__) || defined(SHARED) || defined(__ARM_DWARF_EH__)
98 #if !defined(HAVE_INITFINI_ARRAY)
99 extern __dso_hidden const fptr_t __DTOR_LIST__start __asm("__DTOR_LIST__");
100
101 __dso_hidden const fptr_t __aligned(sizeof(void *)) __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")
__do_global_dtors_aux(void)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__start + 1; p < __DTOR_LIST_END__; ) {
126 (*(*p++))();
127 }
128 #endif
129
130 #if !defined(__ARM_EABI__) || defined(__ARM_DWARF_EH__)
131 if (deregister_frame_info)
132 deregister_frame_info(__EH_FRAME_LIST__);
133 #endif
134 }
135 #endif /* !__ARM_EABI__ || SHARED || __ARM_DWARF_EH__ */
136