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/* $OpenBSD: crtbegin.c,v 1.12 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 "os-note-elf.h"
#include "extern.h"
struct dwarf2_eh_object {
void *space[8];
};
void __register_frame_info(const void *, struct dwarf2_eh_object *)
__attribute__((weak));
void __register_frame_info(const void *begin, struct dwarf2_eh_object *ob)
{
}
static const char __EH_FRAME_BEGIN__[]
__attribute__((section(".eh_frame"), aligned(4))) = { };
/*
* 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 = NULL;
__asm(".hidden __dso_handle");
#endif
static const init_f __CTOR_LIST__[1]
__attribute__((section(".ctors"))) = { (void *)-1 }; /* XXX */
static const init_f __DTOR_LIST__[1]
__attribute__((section(".dtors"))) = { (void *)-1 }; /* XXX */
static void __dtors(void);
static void __ctors(void);
static void
__dtors()
{
unsigned long i = (unsigned long) __DTOR_LIST__[0];
const 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()
{
const 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()
{
static int initialized = 0;
static struct dwarf2_eh_object object;
/*
* Call global constructors.
* Arrange to call global destructors at exit.
*/
if (!initialized) {
initialized = 1;
__register_frame_info(__EH_FRAME_BEGIN__, &object);
(__ctors)();
atexit(__fini);
}
}
void
__do_fini()
{
static int finalized = 0;
if (!finalized) {
finalized = 1;
/*
* Call global destructors.
*/
(__dtors)();
}
}
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