sys/compat/common/vm_43.c

   1 /*      $NetBSD: vm_43.c,v 1.15 2007/03/04 06:01:13 christos Exp $      */
   2
   3 /*
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
  36  *
  37  *      @(#)vm_mmap.c   8.5 (Berkeley) 5/19/94
  38  */
  39
  40 /*
  41  * Copyright (c) 1988 University of Utah.
  42  *
  43  * This code is derived from software contributed to Berkeley by
  44  * the Systems Programming Group of the University of Utah Computer
  45  * Science Department.
  46  *
  47  * Redistribution and use in source and binary forms, with or without
  48  * modification, are permitted provided that the following conditions
  49  * are met:
  50  * 1. Redistributions of source code must retain the above copyright
  51  *    notice, this list of conditions and the following disclaimer.
  52  * 2. Redistributions in binary form must reproduce the above copyright
  53  *    notice, this list of conditions and the following disclaimer in the
  54  *    documentation and/or other materials provided with the distribution.
  55  * 3. All advertising materials mentioning features or use of this software
  56  *    must display the following acknowledgement:
  57  *      This product includes software developed by the University of
  58  *      California, Berkeley and its contributors.
  59  * 4. Neither the name of the University nor the names of its contributors
  60  *    may be used to endorse or promote products derived from this software
  61  *    without specific prior written permission.
  62  *
  63  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  64  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  65  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  66  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  67  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  68  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  69  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  70  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  71  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  72  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  73  * SUCH DAMAGE.
  74  *
  75  * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
  76  *
  77  *      @(#)vm_mmap.c   8.5 (Berkeley) 5/19/94
  78  */
  79
  80 /*
  81  * Mapped file (mmap) interface to VM
  82  */
  83
  84 #include <sys/cdefs.h>
  85 __KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.15 2007/03/04 06:01:13 christos Exp $");
  86
  87 #include <sys/param.h>
  88 #include <sys/systm.h>
  89 #include <sys/filedesc.h>
  90 #include <sys/resourcevar.h>
  91 #include <sys/proc.h>
  92 #include <sys/vnode.h>
  93 #include <sys/file.h>
  94 #include <sys/mman.h>
  95
  96 #include <sys/mount.h>
  97 #include <sys/syscallargs.h>
  98
  99 #include <miscfs/specfs/specdev.h>
 100
 101 /* ARGSUSED */
 102 int
 103 compat_43_sys_getpagesize(struct lwp *l, const void *v, register_t *retval)
 104 {
 105
 106         *retval = PAGE_SIZE;
 107         return (0);
 108 }
 109
 110 int
 111 compat_43_sys_mmap(struct lwp *l, const struct compat_43_sys_mmap_args *uap, register_t *retval)
 112 {
 113         /* {
 114                 syscallarg(void *) addr;
 115                 syscallarg(size_t) len;
 116                 syscallarg(int) prot;
 117                 syscallarg(int) flags;
 118                 syscallarg(int) fd;
 119                 syscallarg(long) pos;
 120         } */
 121         struct sys_mmap_args /* {
 122                 syscallarg(void *) addr;
 123                 syscallarg(size_t) len;
 124                 syscallarg(int) prot;
 125                 syscallarg(int) flags;
 126                 syscallarg(int) fd;
 127                 syscallarg(long) pad;
 128                 syscallarg(off_t) pos;
 129         } */ nargs;
 130         static const char cvtbsdprot[8] = {
 131                 0,
 132                 PROT_EXEC,
 133                 PROT_WRITE,
 134                 PROT_EXEC|PROT_WRITE,
 135                 PROT_READ,
 136                 PROT_EXEC|PROT_READ,
 137                 PROT_WRITE|PROT_READ,
 138                 PROT_EXEC|PROT_WRITE|PROT_READ,
 139         };
 140 #define OMAP_ANON       0x0002
 141 #define OMAP_COPY       0x0020
 142 #define OMAP_SHARED     0x0010
 143 #define OMAP_FIXED      0x0100
 144 #define OMAP_INHERIT    0x0800
 145
 146         SCARG(&nargs, addr) = SCARG(uap, addr);
 147         SCARG(&nargs, len) = SCARG(uap, len);
 148         /* Note: index using prot is sign-safe due to mask */
 149         SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7];
 150         SCARG(&nargs, flags) = 0;
 151         if (SCARG(uap, flags) & OMAP_ANON)
 152                 SCARG(&nargs, flags) |= MAP_ANON;
 153         if (SCARG(uap, flags) & OMAP_COPY)
 154                 SCARG(&nargs, flags) |= MAP_COPY;
 155         if (SCARG(uap, flags) & OMAP_SHARED)
 156                 SCARG(&nargs, flags) |= MAP_SHARED;
 157         else
 158                 SCARG(&nargs, flags) |= MAP_PRIVATE;
 159         if (SCARG(uap, flags) & OMAP_FIXED)
 160                 SCARG(&nargs, flags) |= MAP_FIXED;
 161         if (SCARG(uap, flags) & OMAP_INHERIT)
 162                 SCARG(&nargs, flags) |= MAP_INHERIT;
 163         SCARG(&nargs, fd) = SCARG(uap, fd);
 164         SCARG(&nargs, pos) = SCARG(uap, pos);
 165         return (sys_mmap(l, &nargs, retval));
 166 }