/* $NetBSD: linux_pipe.c,v 1.63 2008/06/18 12:24:18 tsutsui Exp $ */ /*- * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Eric Haszlakiewicz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: linux_pipe.c,v 1.63 2008/06/18 12:24:18 tsutsui Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/mbuf.h> #include <sys/mman.h> #include <sys/mount.h> #include <sys/sched.h> #include <sys/syscallargs.h> #include <compat/linux/common/linux_types.h> #include <compat/linux/common/linux_mmap.h> #include <compat/linux/common/linux_signal.h> #include <compat/linux/common/linux_ipc.h> #include <compat/linux/common/linux_sem.h> #include <compat/linux/linux_syscallargs.h> /* Used on: arm, i386, m68k, ppc, amd64 */ /* Not used on: alpha, mips, sparc, sparc64 */ /* Alpha, mips, sparc and sparc64 pass one of the fds in a register */ /* * NetBSD passes fd[0] in retval[0], and fd[1] in retval[1]. * Linux directly passes the pointer. */ int linux_sys_pipe(struct lwp *l, const struct linux_sys_pipe_args *uap, register_t *retval) { /* { syscallarg(int *) pfds; } */ int error; #ifdef __amd64__ int pfds[2]; #endif if ((error = sys_pipe(l, 0, retval))) return error; #ifndef __amd64__ /* Assumes register_t is an int */ if ((error = copyout(retval, SCARG(uap, pfds), 2 * sizeof (int)))) return error; #else /* On amd64, sizeof(register_t) != sizeof(int) */ pfds[0] = (int)retval[0]; pfds[1] = (int)retval[1]; if ((error = copyout(pfds, SCARG(uap, pfds), sizeof(pfds)))) return error; #endif retval[0] = 0; return 0; }