2 * Copyright 1996, 1997, 1998, 2000 John D. Polstra.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/param.h>
30 typedef void (*fptr)(void);
32 static fptr ctor_list[1] __attribute__((section(".ctors"))) = { (fptr) -1 };
33 static fptr dtor_list[1] __attribute__((section(".dtors"))) = { (fptr) -1 };
40 for(fpp = ctor_list + 1; *fpp != 0; ++fpp)
42 while(--fpp > ctor_list)
51 for(fpp = dtor_list + 1; *fpp != 0; ++fpp)
56 * With very large programs on some architectures (e.g., the Alpha),
57 * it is possible to get relocation overflows on the limited
58 * displacements of call/bsr instructions. It is particularly likely
59 * for the calls from _init() and _fini(), because they are in
60 * separate sections. Avoid the problem by forcing indirect calls.
62 static void (*p_do_ctors)(void) = do_ctors;
63 static void (*p_do_dtors)(void) = do_dtors;
65 extern void _init(void) __attribute__((section(".init")));
73 extern void _fini(void) __attribute__((section(".fini")));