1 /* $NetBSD: linux_pipe.c,v 1.63 2008/06/18 12:24:18 tsutsui 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: linux_pipe.c,v 1.63 2008/06/18 12:24:18 tsutsui Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/mbuf.h> 40 #include <sys/mman.h> 41 #include <sys/mount.h> 42 43 #include <sys/sched.h> 44 #include <sys/syscallargs.h> 45 46 #include <compat/linux/common/linux_types.h> 47 #include <compat/linux/common/linux_mmap.h> 48 #include <compat/linux/common/linux_signal.h> 49 #include <compat/linux/common/linux_ipc.h> 50 #include <compat/linux/common/linux_sem.h> 51 52 #include <compat/linux/linux_syscallargs.h> 53 54 /* Used on: arm, i386, m68k, ppc, amd64 */ 55 /* Not used on: alpha, mips, sparc, sparc64 */ 56 /* Alpha, mips, sparc and sparc64 pass one of the fds in a register */ 57 58 /* 59 * NetBSD passes fd[0] in retval[0], and fd[1] in retval[1]. 60 * Linux directly passes the pointer. 61 */ 62 int 63 linux_sys_pipe(struct lwp *l, const struct linux_sys_pipe_args *uap, register_t *retval) 64 { 65 /* { 66 syscallarg(int *) pfds; 67 } */ 68 int error; 69 #ifdef __amd64__ 70 int pfds[2]; 71 #endif 72 73 if ((error = sys_pipe(l, 0, retval))) 74 return error; 75 76 #ifndef __amd64__ 77 /* Assumes register_t is an int */ 78 if ((error = copyout(retval, SCARG(uap, pfds), 2 * sizeof (int)))) 79 return error; 80 #else 81 /* On amd64, sizeof(register_t) != sizeof(int) */ 82 pfds[0] = (int)retval[0]; 83 pfds[1] = (int)retval[1]; 84 85 if ((error = copyout(pfds, SCARG(uap, pfds), sizeof(pfds)))) 86 return error; 87 #endif 88 89 retval[0] = 0; 90 return 0; 91 } 92