60 lines
2.4 KiB
ArmAsm
60 lines
2.4 KiB
ArmAsm
|
/* $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 */
|