116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/* $NetBSD: crtbegin.c,v 1.2 1997/04/16 20:53:15 thorpej 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.
|
|
*/
|
|
|
|
/*
|
|
* XXX EVENTUALLY SHOULD BE MERGED BACK WITH c++rt0.c
|
|
*/
|
|
|
|
/*
|
|
* Run-time module which handles constructors and destructors,
|
|
* and NetBSD identification.
|
|
*
|
|
* The linker constructs the following arrays of pointers to global
|
|
* constructors and destructors. The first element contains the
|
|
* number of pointers in each or -1 to indicate that the run-time
|
|
* code should figure out how many there are. The tables are also
|
|
* null-terminated.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/exec_elf.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "sysident.h"
|
|
|
|
static void (*__CTOR_LIST__[1]) __P((void))
|
|
__attribute__((section(".ctors"))) = { (void *)-1 }; /* XXX */
|
|
static void (*__DTOR_LIST__[1]) __P((void))
|
|
__attribute__((section(".dtors"))) = { (void *)-1 }; /* XXX */
|
|
|
|
static void __dtors __P((void));
|
|
static void __ctors __P((void));
|
|
|
|
static void
|
|
__dtors()
|
|
{
|
|
unsigned long i = (unsigned long) __DTOR_LIST__[0];
|
|
void (**p)(void);
|
|
|
|
if (i == -1) {
|
|
for (i = 1; __DTOR_LIST__[i] != NULL; i++)
|
|
;
|
|
i--;
|
|
}
|
|
p = __DTOR_LIST__ + i;
|
|
while (i--)
|
|
(**p--)();
|
|
}
|
|
|
|
static void
|
|
__ctors()
|
|
{
|
|
void (**p)(void) = __CTOR_LIST__ + 1;
|
|
|
|
while (*p)
|
|
(**p++)();
|
|
}
|
|
|
|
extern void __init(void) __attribute__((section(".init")));
|
|
|
|
void
|
|
__init()
|
|
{
|
|
static int initialized = 0;
|
|
|
|
/*
|
|
* Call global constructors.
|
|
* Arrange to call global destructors at exit.
|
|
*/
|
|
if (!initialized) {
|
|
initialized = 1;
|
|
__ctors();
|
|
}
|
|
|
|
}
|
|
|
|
extern void __fini(void) __attribute__((section(".fini")));
|
|
|
|
void
|
|
__fini()
|
|
{
|
|
/*
|
|
* Call global destructors.
|
|
*/
|
|
__dtors();
|
|
}
|