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__vfork14.S revision 1.3 
      1 /*	$NetBSD: __vfork14.S,v 1.3 2001/05/11 19:58:08 msaitoh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	from: @(#)Ovfork.s	5.1 (Berkeley) 4/23/90
     39  */
     40 
     41 #include <machine/asm.h>
     42 #if defined(SYSLIBC_SCCS) && !defined(lint)
     43 	RCSID("$NetBSD: __vfork14.S,v 1.3 2001/05/11 19:58:08 msaitoh Exp $")
     44 #endif /* SYSLIBC_SCCS and not lint */
     45 
     46 #include "SYS.h"
     47 
     48 /*
     49  * pid = vfork();
     50  *
     51  * r1 == 0 in parent process, r1 == 1 in child process.
     52  * r0 == pid of child in parent, r0 == pid of parent in child.
     53  *
     54  */
     55 ENTRY(__vfork14)
     56 	sts	pr, r2		/* my rta into r2 */
     57 	mov.l	LSYS___vfork14, r0
     58 	trapa	#0x80
     59 	bf	err
     60 	add	#0xff, r1
     61 	and	r1, r0
     62 	jmp	@r2
     63 	nop
     64 err:
     65 	mov.l	L_errno, r1
     66 	mov.l	r0, @r1
     67 	mov	#0xff, r0
     68 	jmp	@r2
     69 	nop
     70 
     71 	.align	2
     72 LSYS___vfork14:
     73 	.long	SYS___vfork14
     74 L_errno:
     75 	.long	_C_LABEL(errno)
     76