minix/lib/libc/arch/sparc64/sys/__vfork14.S

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/* $NetBSD: __vfork14.S,v 1.3 2003/08/07 16:42:29 agc Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* from: Header: Ovfork.s,v 1.1 91/07/06 13:05:56 torek Exp
*/
#include <machine/asm.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
#if 0
.asciz "@(#)Ovfork.s 8.1 (Berkeley) 6/4/93"
#else
RCSID("$NetBSD: __vfork14.S,v 1.3 2003/08/07 16:42:29 agc Exp $")
#endif
#endif /* SYSLIBC_SCCS and not lint */
/*
* pid = vfork();
*
* %o1 == 0 in parent process, 1 in child process.
* %o0 == pid of child in parent, pid of parent in child.
*/
#include "SYS.h"
SYSCALL(__vfork14)
dec %o1 /* from 1 to 0 in child, 0 to -1 in parent */
retl
and %o0, %o1, %o0 /* return 0 in child, pid in parent */