1 | /* $NetBSD: vm_43.c,v 1.18 2011/02/08 20:20:26 rmind Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1988 University of Utah. |
5 | * Copyright (c) 1991, 1993 |
6 | * The Regents of the University of California. All rights reserved. |
7 | * |
8 | * This code is derived from software contributed to Berkeley by |
9 | * the Systems Programming Group of the University of Utah Computer |
10 | * Science Department. |
11 | * |
12 | * Redistribution and use in source and binary forms, with or without |
13 | * modification, are permitted provided that the following conditions |
14 | * are met: |
15 | * 1. Redistributions of source code must retain the above copyright |
16 | * notice, this list of conditions and the following disclaimer. |
17 | * 2. Redistributions in binary form must reproduce the above copyright |
18 | * notice, this list of conditions and the following disclaimer in the |
19 | * documentation and/or other materials provided with the distribution. |
20 | * 3. Neither the name of the University nor the names of its contributors |
21 | * may be used to endorse or promote products derived from this software |
22 | * without specific prior written permission. |
23 | * |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
34 | * SUCH DAMAGE. |
35 | * |
36 | * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$ |
37 | * |
38 | * @(#)vm_mmap.c 8.5 (Berkeley) 5/19/94 |
39 | */ |
40 | |
41 | /* |
42 | * Mapped file (mmap) interface to VM |
43 | */ |
44 | |
45 | #include <sys/cdefs.h> |
46 | __KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.18 2011/02/08 20:20:26 rmind Exp $" ); |
47 | |
48 | #include <sys/param.h> |
49 | #include <sys/systm.h> |
50 | #include <sys/filedesc.h> |
51 | #include <sys/resourcevar.h> |
52 | #include <sys/proc.h> |
53 | #include <sys/vnode.h> |
54 | #include <sys/file.h> |
55 | #include <sys/mman.h> |
56 | |
57 | #include <sys/syscallargs.h> |
58 | |
59 | #include <miscfs/specfs/specdev.h> |
60 | |
61 | /* ARGSUSED */ |
62 | int |
63 | compat_43_sys_getpagesize(struct lwp *l, const void *v, register_t *retval) |
64 | { |
65 | |
66 | *retval = PAGE_SIZE; |
67 | return (0); |
68 | } |
69 | |
70 | int |
71 | compat_43_sys_mmap(struct lwp *l, const struct compat_43_sys_mmap_args *uap, register_t *retval) |
72 | { |
73 | /* { |
74 | syscallarg(void *) addr; |
75 | syscallarg(size_t) len; |
76 | syscallarg(int) prot; |
77 | syscallarg(int) flags; |
78 | syscallarg(int) fd; |
79 | syscallarg(long) pos; |
80 | } */ |
81 | struct sys_mmap_args /* { |
82 | syscallarg(void *) addr; |
83 | syscallarg(size_t) len; |
84 | syscallarg(int) prot; |
85 | syscallarg(int) flags; |
86 | syscallarg(int) fd; |
87 | syscallarg(long) pad; |
88 | syscallarg(off_t) pos; |
89 | } */ nargs; |
90 | static const char cvtbsdprot[8] = { |
91 | 0, |
92 | PROT_EXEC, |
93 | PROT_WRITE, |
94 | PROT_EXEC|PROT_WRITE, |
95 | PROT_READ, |
96 | PROT_EXEC|PROT_READ, |
97 | PROT_WRITE|PROT_READ, |
98 | PROT_EXEC|PROT_WRITE|PROT_READ, |
99 | }; |
100 | #define OMAP_ANON 0x0002 |
101 | #define OMAP_COPY 0x0020 |
102 | #define OMAP_SHARED 0x0010 |
103 | #define OMAP_FIXED 0x0100 |
104 | #define OMAP_INHERIT 0x0800 |
105 | |
106 | SCARG(&nargs, addr) = SCARG(uap, addr); |
107 | SCARG(&nargs, len) = SCARG(uap, len); |
108 | /* Note: index using prot is sign-safe due to mask */ |
109 | SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7]; |
110 | SCARG(&nargs, flags) = 0; |
111 | if (SCARG(uap, flags) & OMAP_ANON) |
112 | SCARG(&nargs, flags) |= MAP_ANON; |
113 | if (SCARG(uap, flags) & OMAP_COPY) |
114 | SCARG(&nargs, flags) |= MAP_COPY; |
115 | if (SCARG(uap, flags) & OMAP_SHARED) |
116 | SCARG(&nargs, flags) |= MAP_SHARED; |
117 | else |
118 | SCARG(&nargs, flags) |= MAP_PRIVATE; |
119 | if (SCARG(uap, flags) & OMAP_FIXED) |
120 | SCARG(&nargs, flags) |= MAP_FIXED; |
121 | if (SCARG(uap, flags) & OMAP_INHERIT) |
122 | SCARG(&nargs, flags) |= MAP_INHERIT; |
123 | SCARG(&nargs, fd) = SCARG(uap, fd); |
124 | SCARG(&nargs, pos) = SCARG(uap, pos); |
125 | return (sys_mmap(l, &nargs, retval)); |
126 | } |
127 | |