1 /* $NetBSD: linux_pipe.c,v 1.18 2017/12/26 08:30:57 kamil 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 *
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 1.18 2017/12/26 08:30:57 kamil Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/mbuf.h>
39 #include <sys/mman.h>
40 #include <sys/mount.h>
41 #include <sys/proc.h>
42 #include <sys/filedesc.h>
43 #include <sys/fcntl.h>
44
45 #include <sys/syscallargs.h>
46
47 #include <compat/linux/common/linux_types.h>
48 #include <compat/linux/common/linux_mmap.h>
49 #include <compat/linux/common/linux_signal.h>
50 #include <compat/linux/common/linux_fcntl.h>
51
52 #include <compat/linux/linux_syscallargs.h>
53
54 /*
55 * The Alpha version of sys_pipe.
56 *
57 * Linux returns fd[1] in a4
58 * and fd[0] in the retval[0].
59 */
60
61
62 int
linux_sys_pipe(struct lwp * l,const void * v,register_t * retval)63 linux_sys_pipe(struct lwp *l, const void *v, register_t *retval)
64 {
65 int fd[2], error;
66
67 if ((error = pipe1(l, fd, 0)))
68 return error;
69
70 retval[0] = fd[0];
71 (l->l_md.md_tf)->tf_regs[FRAME_A4] = fd[1];
72 return 0;
73 }
74
75 int
linux_sys_pipe2(struct lwp * l,const struct linux_sys_pipe2_args * uap,register_t * retval)76 linux_sys_pipe2(struct lwp *l, const struct linux_sys_pipe2_args *uap,
77 register_t *retval)
78 {
79 /* {
80 syscallarg(int *) pfds;
81 syscallarg(int) flags;
82 } */
83 int fd[2], error, flags;
84
85 flags = linux_to_bsd_ioflags(SCARG(uap, flags));
86 if ((flags & ~(O_CLOEXEC|O_NONBLOCK)) != 0)
87 return EINVAL;
88
89 if ((error = pipe1(l, fd, flags)))
90 return error;
91
92 retval[0] = fd[0];
93 (l->l_md.md_tf)->tf_regs[FRAME_A4] = fd[1];
94
95 return 0;
96 }
97