1 /* $NetBSD: linux_pipe.c,v 1.58 2007/02/09 21:55:19 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and 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 1.58 2007/02/09 21:55:19 ad 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 50 #include <sys/syscallargs.h> 51 52 #include <compat/linux/common/linux_types.h> 53 #include <compat/linux/common/linux_mmap.h> 54 #include <compat/linux/common/linux_signal.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 58 /* Used on: arm, i386, m68k, ppc, amd64 */ 59 /* Not used on: alpha, mips, sparc, sparc64 */ 60 /* Alpha, mips, sparc and sparc64 pass one of the fds in a register */ 61 62 /* 63 * NetBSD passes fd[0] in retval[0], and fd[1] in retval[1]. 64 * Linux directly passes the pointer. 65 */ 66 int 67 linux_sys_pipe(l, v, retval) 68 struct lwp *l; 69 void *v; 70 register_t *retval; 71 { 72 struct linux_sys_pipe_args /* { 73 syscallarg(int *) pfds; 74 } */ *uap = v; 75 int error; 76 #ifdef __amd64__ 77 int pfds[2]; 78 #endif 79 80 if ((error = sys_pipe(l, 0, retval))) 81 return error; 82 83 #ifndef __amd64__ 84 /* Assumes register_t is an int */ 85 if ((error = copyout(retval, SCARG(uap, pfds), 2 * sizeof (int)))) 86 return error; 87 #else 88 /* On amd64, sizeof(register_t) != sizeof(int) */ 89 pfds[0] = (int)retval[0]; 90 pfds[1] = (int)retval[1]; 91 92 if ((error = copyout(pfds, SCARG(uap, pfds), sizeof(pfds)))) 93 return error; 94 #endif 95 96 retval[0] = 0; 97 return 0; 98 } 99