1 /* $OpenBSD: vm_43.c,v 1.5 2003/06/02 23:27:59 millert Exp $ */
2 /* $NetBSD: vm_43.c,v 1.1 1996/02/05 01:58:29 christos Exp $ */
3
4 /*
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1991, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
38 *
39 * @(#)vm_mmap.c 8.5 (Berkeley) 5/19/94
40 */
41
42 /*
43 * Mapped file (mmap) interface to VM
44 */
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/filedesc.h>
49 #include <sys/resourcevar.h>
50 #include <sys/proc.h>
51 #include <sys/vnode.h>
52 #include <sys/file.h>
53 #include <sys/mman.h>
54 #include <sys/conf.h>
55
56 #include <sys/mount.h>
57 #include <sys/syscallargs.h>
58
59 #include <miscfs/specfs/specdev.h>
60
61 #include <uvm/uvm_extern.h>
62
63 /* ARGSUSED */
64 int
65 compat_43_sys_getpagesize(p, v, retval)
66 struct proc *p;
67 void *v;
68 register_t *retval;
69 {
70
71 *retval = PAGE_SIZE;
72 return (0);
73 }
74
75 int
76 compat_43_sys_mmap(p, v, retval)
77 struct proc *p;
78 void *v;
79 register_t *retval;
80 {
81 register struct compat_43_sys_mmap_args /* {
82 syscallarg(caddr_t) addr;
83 syscallarg(size_t) len;
84 syscallarg(int) prot;
85 syscallarg(int) flags;
86 syscallarg(int) fd;
87 syscallarg(long) pos;
88 } */ *uap = v;
89 struct sys_mmap_args /* {
90 syscallarg(caddr_t) addr;
91 syscallarg(size_t) len;
92 syscallarg(int) prot;
93 syscallarg(int) flags;
94 syscallarg(int) fd;
95 syscallarg(long) pad;
96 syscallarg(off_t) pos;
97 } */ nargs;
98 static const char cvtbsdprot[8] = {
99 0,
100 PROT_EXEC,
101 PROT_WRITE,
102 PROT_EXEC|PROT_WRITE,
103 PROT_READ,
104 PROT_EXEC|PROT_READ,
105 PROT_WRITE|PROT_READ,
106 PROT_EXEC|PROT_WRITE|PROT_READ,
107 };
108 #define OMAP_ANON 0x0002
109 #define OMAP_COPY 0x0020
110 #define OMAP_SHARED 0x0010
111 #define OMAP_FIXED 0x0100
112 #define OMAP_INHERIT 0x0800
113
114 SCARG(&nargs, addr) = SCARG(uap, addr);
115 SCARG(&nargs, len) = SCARG(uap, len);
116 SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7];
117 SCARG(&nargs, flags) = 0;
118 if (SCARG(uap, flags) & OMAP_ANON)
119 SCARG(&nargs, flags) |= MAP_ANON;
120 if (SCARG(uap, flags) & OMAP_COPY)
121 SCARG(&nargs, flags) |= MAP_PRIVATE;
122 if (SCARG(uap, flags) & OMAP_SHARED)
123 SCARG(&nargs, flags) |= MAP_SHARED;
124 else
125 SCARG(&nargs, flags) |= MAP_PRIVATE;
126 if (SCARG(uap, flags) & OMAP_FIXED)
127 SCARG(&nargs, flags) |= MAP_FIXED;
128 if (SCARG(uap, flags) & OMAP_INHERIT)
129 SCARG(&nargs, flags) |= MAP_INHERIT;
130 SCARG(&nargs, fd) = SCARG(uap, fd);
131 SCARG(&nargs, pos) = SCARG(uap, pos);
132 return (sys_mmap(p, &nargs, retval));
133 }