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linux_pipe.c revision 1.7 
      1 /*	$NetBSD: linux_pipe.c,v 1.7 2003/01/18 08:02:46 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Eric Haszlakiewicz.
      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 NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: linux_pipe.c,v 1.7 2003/01/18 08:02:46 thorpej Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/kernel.h>
     45 #include <sys/malloc.h>
     46 #include <sys/mbuf.h>
     47 #include <sys/mman.h>
     48 #include <sys/mount.h>
     49 #include <sys/proc.h>
     50 
     51 #include <sys/sa.h>
     52 #include <sys/syscallargs.h>
     53 
     54 #include <compat/linux/common/linux_types.h>
     55 #include <compat/linux/common/linux_mmap.h>
     56 #include <compat/linux/common/linux_signal.h>
     57 
     58 #include <compat/linux/linux_syscallargs.h>
     59 
     60 /*
     61  * The Alpha version of sys_pipe.
     62  *
     63  * Linux returns fd[1] in a4
     64  * and fd[0] in the retval[0].
     65  */
     66 
     67 
     68 int
     69 linux_sys_pipe(l, v, retval)
     70 	struct lwp *l;
     71 	void *v;
     72 	register_t *retval;
     73 {
     74 	int error;
     75 
     76 	if ((error = sys_pipe(l, 0, retval)))
     77 		return error;
     78 
     79 	(l->l_md.md_tf)->tf_regs[FRAME_A4] = retval[1];
     80 	return 0;
     81 }
     82