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mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/lib/csu/i386/c++rt0.c
John Polstra 89370a31f2 Changed the dimensions of __CTOR_LIST__ and __DTOR_LIST__ from 0
to 2.  This makes them agree with the declarations in libgcc, and
clears the way once again for linking c++rt0.o into all libraries,
and eliminating CPLUSPLUSLIB from <bsd.lib.mk>.  (I have not made
that change yet, because there is still a bootstrapping problem
for "make world".)

Also, removed a check which ensured that the constructor count in
the first word of __CTOR_LIST__ was greater than zero before
traversing the list.  I had added that check earlier, but it is no
longer necessary, now that there is guaranteed to be at least 2
words in __CTOR_LIST__.
1996-02-20 04:07:26 +00:00

87 lines
2.5 KiB
C

/*
* 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.
*
* $Id: c++rt0.c,v 1.4 1996/01/15 17:53:25 jdp Exp $
*/
/*
* 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.
*/
void (*__CTOR_LIST__[2])(void);
void (*__DTOR_LIST__[2])(void);
static void
__dtors(void)
{
unsigned long i = (unsigned long) __DTOR_LIST__[0];
void (**p)(void) = __DTOR_LIST__ + i;
while (i--)
(**p--)();
}
static void
__ctors(void)
{
void (**p)(void) = __CTOR_LIST__ + 1;
while (*p)
(**p++)();
}
extern void __init() asm(".init");
extern void __fini() asm(".fini");
void
__init(void)
{
static int initialized = 0;
/*
* Call global constructors.
* Arrange to call global destructors at exit.
*/
if (!initialized) {
initialized = 1;
__ctors();
}
}
void
__fini(void)
{
__dtors();
}