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/*-
* Copyright 1996-1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
typedef void (*fptr)(void);
static fptr ctor_list[1] __attribute__((section(".ctors"))) = { (fptr) -1 };
static fptr dtor_list[1] __attribute__((section(".dtors"))) = { (fptr) -1 };
/* Both do_ctors() and do_dtors() live in .text (the default) */
static void
do_ctors(void)
{
fptr *fpp;
for(fpp = ctor_list + 1; *fpp != 0; ++fpp)
(**fpp)();
}
static void
do_dtors(void)
{
fptr *fpp;
for(fpp = dtor_list + 1; *fpp != 0; ++fpp)
;
while(--fpp > dtor_list)
(**fpp)();
}
/*
* On very large programs, it is possible to get a relocation overflow
* of the 21-bit BSR displacements. It is particularly likely for the
* calls from _init() and _fini(), because they are in separate sections.
* Avoid the problem by forcing indirect calls.
*/
static void (*p_do_ctors)(void) = do_ctors;
static void (*p_do_dtors)(void) = do_dtors;
extern void _init(void) __attribute__((section(".init")));
void
_init(void)
{
(*p_do_ctors)();
}
extern void _fini(void) __attribute__((section(".fini")));
void
_fini(void)
{
(*p_do_dtors)();
}
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