11.2Smatt/*	$NetBSD: pipe.S,v 1.2 2015/03/27 06:44:28 matt Exp $	*/
21.1Smatt
31.1Smatt/*-
41.1Smatt * Copyright (c) 2014 The NetBSD Foundation, Inc.
51.1Smatt * All rights reserved.
61.1Smatt *
71.1Smatt * This code is derived from software contributed to The NetBSD Foundation
81.1Smatt * by Matt Thomas of 3am Software Foundry.
91.1Smatt *
101.1Smatt * Redistribution and use in source and binary forms, with or without
111.1Smatt * modification, are permitted provided that the following conditions
121.1Smatt * are met:
131.1Smatt * 1. Redistributions of source code must retain the above copyright
141.1Smatt *    notice, this list of conditions and the following disclaimer.
151.1Smatt * 2. Redistributions in binary form must reproduce the above copyright
161.1Smatt *    notice, this list of conditions and the following disclaimer in the
171.1Smatt *    documentation and/or other materials provided with the distribution.
181.1Smatt *
191.1Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
201.1Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
211.1Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
221.1Smatt * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
231.1Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
241.1Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
251.1Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
261.1Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
271.1Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
281.1Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
291.1Smatt * POSSIBILITY OF SUCH DAMAGE.
301.1Smatt */
311.1Smatt
321.1Smatt#include "SYS.h"
331.1Smatt
341.1Smatt#if defined(LIBC_SCCS) && !defined(lint)
351.2Smatt	RCSID("$NetBSD: pipe.S,v 1.2 2015/03/27 06:44:28 matt Exp $")
361.1Smatt#endif /* LIBC_SCCS and not lint */
371.1Smatt
381.1Smatt#ifdef WEAK_ALIAS
391.1SmattWEAK_ALIAS(pipe, _pipe)
401.1Smatt#endif
411.1Smatt
421.1SmattENTRY(_pipe)
431.2Smatt	mv		a2, a0		# a0 will be overwritten
441.1Smatt	SYSTRAP(pipe)	# pipe(fildes) int fildes[2];
451.1Smatt	JUMP_TO_CERROR()	/* error */
461.1Smatt	/* success */
471.2Smatt	sw		a0, 0(a2)	# store the two file descriptors
481.2Smatt	sw		a1, __SIZEOF_INT__(a2)
491.2Smatt	li		a0, 0
501.1Smatt	ret
511.1SmattEND(_pipe)
52