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/* $OpenBSD: crtbeginS.c,v 1.8 2007/09/03 14:40:16 millert Exp $ */
/* $NetBSD: crtbegin.c,v 1.1 1996/09/12 16:59:03 cgd Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*/
/*
* Run-time module for GNU C++ compiled shared libraries.
*
* The linker constructs the following arrays of pointers to global
* constructors and destructors. The first element contains the
* number of pointers in each.
* The tables are also null-terminated.
*/
#include <stdlib.h>
#include "md_init.h"
#include "extern.h"
/*
* Include support for the __cxa_atexit/__cxa_finalize C++ abi for
* gcc > 2.x. __dso_handle is NULL in the main program and a unique
* value for each C++ shared library. For more info on this API, see:
*
* http://www.codesourcery.com/cxx-abi/abi.html#dso-dtor
*/
#if (__GNUC__ > 2)
void *__dso_handle = &__dso_handle;
__asm(".hidden __dso_handle");
extern void __cxa_finalize(void *) __attribute__((weak));
#endif
static init_f __CTOR_LIST__[1]
__attribute__((section(".ctors"))) = { (void *)-1 }; /* XXX */
static init_f __DTOR_LIST__[1]
__attribute__((section(".dtors"))) = { (void *)-1 }; /* XXX */
static void __dtors(void);
static void __ctors(void);
void
__dtors(void)
{
unsigned long i = (unsigned long) __DTOR_LIST__[0];
init_f *p;
if (i == -1) {
for (i = 1; __DTOR_LIST__[i] != NULL; i++)
;
i--;
}
p = __DTOR_LIST__ + i;
while (i--) {
(**p--)();
}
}
static void
__ctors(void)
{
init_f *p = __CTOR_LIST__ + 1;
while (*p) {
(**p++)();
}
}
void _init(void);
void _fini(void);
static void _do_init(void);
static void _do_fini(void);
MD_SECTION_PROLOGUE(".init", _init);
MD_SECTION_PROLOGUE(".fini", _fini);
MD_SECT_CALL_FUNC(".init", _do_init);
MD_SECT_CALL_FUNC(".fini", _do_fini);
void
_do_init(void)
{
static int initialized = 0;
/*
* Call global constructors.
* Arrange to call global destructors at exit.
*/
if (!initialized) {
initialized = 1;
__ctors();
}
}
void
_do_fini(void)
{
static int finalized = 0;
if (!finalized) {
finalized = 1;
#if (__GNUC__ > 2)
if (__cxa_finalize != NULL)
__cxa_finalize(__dso_handle);
#endif
/*
* since the _init() function sets up the destructors to
* be called by atexit, do not call the destructors here.
*/
__dtors();
}
}
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