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      1  1.12      matt /*	$NetBSD: fork.S,v 1.12 2009/12/14 01:07:42 matt Exp $	*/
      2   1.4  jonathan 
      3   1.1     glass /*-
      4   1.1     glass  * Copyright (c) 1991, 1993
      5   1.1     glass  *	The Regents of the University of California.  All rights reserved.
      6   1.1     glass  *
      7   1.1     glass  * This code is derived from software contributed to Berkeley by
      8   1.1     glass  * Ralph Campbell.
      9   1.1     glass  *
     10   1.1     glass  * Redistribution and use in source and binary forms, with or without
     11   1.1     glass  * modification, are permitted provided that the following conditions
     12   1.1     glass  * are met:
     13   1.1     glass  * 1. Redistributions of source code must retain the above copyright
     14   1.1     glass  *    notice, this list of conditions and the following disclaimer.
     15   1.1     glass  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.1     glass  *    notice, this list of conditions and the following disclaimer in the
     17   1.1     glass  *    documentation and/or other materials provided with the distribution.
     18  1.11       agc  * 3. Neither the name of the University nor the names of its contributors
     19   1.1     glass  *    may be used to endorse or promote products derived from this software
     20   1.1     glass  *    without specific prior written permission.
     21   1.1     glass  *
     22   1.1     glass  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23   1.1     glass  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24   1.1     glass  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25   1.1     glass  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26   1.1     glass  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27   1.1     glass  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28   1.1     glass  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29   1.1     glass  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30   1.1     glass  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31   1.1     glass  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32   1.1     glass  * SUCH DAMAGE.
     33   1.1     glass  */
     34   1.1     glass 
     35   1.1     glass #include "SYS.h"
     36   1.1     glass 
     37   1.1     glass #if defined(LIBC_SCCS) && !defined(lint)
     38  1.12      matt #if 0
     39  1.12      matt 	RCSID("from: @(#)fork.s	8.1 (Berkeley) 6/4/93")
     40  1.12      matt #else
     41  1.12      matt 	RCSID("$NetBSD: fork.S,v 1.12 2009/12/14 01:07:42 matt Exp $")
     42  1.12      matt #endif
     43   1.1     glass #endif /* LIBC_SCCS and not lint */
     44   1.5  jonathan 
     45  1.10   nathanw LEAF(__fork)
     46  1.12      matt 	PIC_PROLOGUE(__fork)
     47  1.12      matt 
     48  1.12      matt 	SYSTRAP(fork)		# pid = fork()
     49   1.1     glass 	bne	a3, zero, 2f
     50   1.1     glass 	beq	v1, zero, 1f	# v1 == 0 in parent, 1 in child
     51   1.1     glass 	move	v0, zero
     52   1.1     glass 1:
     53  1.12      matt 	PIC_RETURN()
     54   1.1     glass 2:
     55  1.12      matt 	PIC_TAILCALL(__cerror)
     56  1.10   nathanw END(__fork)
     57