Annotation of sys/compat/common/vm_43.c, Revision 1.1.1.1
1.1 nbrk 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: }
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