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__vfork14.S revision 1.5 
      1 /*	$NetBSD: __vfork14.S,v 1.5 2003/08/07 16:42:20 agc 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. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	from: @(#)Ovfork.s	5.1 (Berkeley) 4/23/90
     35  */
     36 
     37 #include <machine/asm.h>
     38 #if defined(SYSLIBC_SCCS) && !defined(lint)
     39 	RCSID("$NetBSD: __vfork14.S,v 1.5 2003/08/07 16:42:20 agc Exp $")
     40 #endif /* SYSLIBC_SCCS and not lint */
     41 
     42 #include "SYS.h"
     43 
     44 /*
     45  * pid = vfork();
     46  *
     47  * r1 == 0 in parent process, r1 == 1 in child process.
     48  * r0 == pid of child in parent, r0 == pid of parent in child.
     49  *
     50  */
     51 ENTRY(__vfork14)
     52 	sts	pr, r2		/* my rta into r2 */
     53 	mov.l	LSYS___vfork14, r0
     54 	trapa	#0x80
     55 	bf	err
     56 	add	#0xff, r1
     57 	and	r1, r0
     58 	jmp	@r2
     59 	nop
     60 err:
     61 #ifdef PIC
     62 	mov	r0, r3
     63 	mova	L_GOT, r0
     64 	mov.l	L_GOT, r1
     65 	add	r0, r1
     66 	mov.l	L_errno, r0
     67 	mov.l	@(r0, r1), r1
     68 	mov.l	r3, @r1
     69 #else
     70 	mov.l	L_errno, r1
     71 	mov.l	r0, @r1
     72 #endif
     73 	mov	#0xff, r0
     74 	jmp	@r2
     75 	nop
     76 
     77 	.align	2
     78 LSYS___vfork14:
     79 	.long	SYS___vfork14
     80 #ifdef PIC
     81 L_GOT:		.long	_GLOBAL_OFFSET_TABLE_
     82 L_errno:	.long	_C_LABEL(errno)@GOT
     83 #else
     84 L_errno:
     85 	.long	_C_LABEL(errno)
     86 #endif
     87