1 | /* $NetBSD: linux_llseek.c,v 1.34 2014/11/09 17:48:08 maxv 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_llseek.c,v 1.34 2014/11/09 17:48:08 maxv Exp $" ); |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/systm.h> |
37 | #include <sys/kernel.h> |
38 | #include <sys/mount.h> |
39 | #include <sys/conf.h> |
40 | |
41 | #include <sys/sched.h> |
42 | #include <sys/syscallargs.h> |
43 | |
44 | #include <compat/linux/common/linux_types.h> |
45 | #include <compat/linux/common/linux_signal.h> |
46 | #include <compat/linux/common/linux_fcntl.h> |
47 | #include <compat/linux/common/linux_util.h> |
48 | |
49 | #include <compat/linux/linux_syscallargs.h> |
50 | |
51 | /* Used on: arm, i386, m68k, mips, ppc, sparc */ |
52 | /* Not used on: alpha, sparc64 */ |
53 | |
54 | /* |
55 | * This appears to be part of a Linux attempt to switch to 64 bits file sizes. |
56 | */ |
57 | int |
58 | linux_sys_llseek(struct lwp *l, const struct linux_sys_llseek_args *uap, register_t *retval) |
59 | { |
60 | /* { |
61 | syscallarg(int) fd; |
62 | syscallarg(uint32_t) ohigh; |
63 | syscallarg(uint32_t) olow; |
64 | syscallarg(void *) res; |
65 | syscallarg(int) whence; |
66 | } */ |
67 | struct sys_lseek_args bla; |
68 | int error; |
69 | off_t off; |
70 | |
71 | off = SCARG(uap, olow) | (((off_t) SCARG(uap, ohigh)) << 32); |
72 | |
73 | SCARG(&bla, fd) = SCARG(uap, fd); |
74 | SCARG(&bla, offset) = off; |
75 | SCARG(&bla, whence) = SCARG(uap, whence); |
76 | |
77 | if ((error = sys_lseek(l, &bla, retval))) |
78 | return error; |
79 | |
80 | if ((error = copyout(retval, SCARG(uap, res), sizeof (off_t)))) |
81 | return error; |
82 | |
83 | retval[0] = 0; |
84 | return 0; |
85 | } |
86 | |