1 /* $NetBSD: linux_llseek.c,v 1.27 2003/01/18 08:02:53 thorpej 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_llseek.c,v 1.27 2003/01/18 08:02:53 thorpej Exp $");
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/mount.h>
46 #include <sys/malloc.h>
47 #include <sys/conf.h>
48
49 #include <sys/sa.h>
50 #include <sys/syscallargs.h>
51
52 #include <compat/linux/common/linux_types.h>
53 #include <compat/linux/common/linux_signal.h>
54 #include <compat/linux/common/linux_fcntl.h>
55 #include <compat/linux/common/linux_util.h>
56
57 #include <compat/linux/linux_syscallargs.h>
58
59 /* Used on: arm, i386, m68k, mips, ppc, sparc */
60 /* Not used on: alpha, sparc64 */
61
62 /*
63 * This appears to be part of a Linux attempt to switch to 64 bits file sizes.
64 */
65 int
66 linux_sys_llseek(l, v, retval)
67 struct lwp *l;
68 void *v;
69 register_t *retval;
70 {
71 struct linux_sys_llseek_args /* {
72 syscallarg(int) fd;
73 syscallarg(uint32_t) ohigh;
74 syscallarg(uint32_t) olow;
75 syscallarg(caddr_t) res;
76 syscallarg(int) whence;
77 } */ *uap = v;
78 struct sys_lseek_args bla;
79 int error;
80 off_t off;
81
82 off = SCARG(uap, olow) | (((off_t) SCARG(uap, ohigh)) << 32);
83
84 SCARG(&bla, fd) = SCARG(uap, fd);
85 SCARG(&bla, offset) = off;
86 SCARG(&bla, whence) = SCARG(uap, whence);
87
88 if ((error = sys_lseek(l, &bla, retval)))
89 return error;
90
91 if ((error = copyout(retval, SCARG(uap, res), sizeof (off_t))))
92 return error;
93
94 retval[0] = 0;
95 return 0;
96 }
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