sys/emulation/43bsd/43bsd_vm.c

   1 /*
   2  * 43BSD_VM.C           - 4.3BSD compatibility virtual memory syscalls
   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. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  * $DragonFly: src/sys/emulation/43bsd/43bsd_vm.c,v 1.1 2003/11/14 20:54:07 daver Exp $
  41  *      from: DragonFly vm/vm_unix.c,v 1.3
  42  *      from: DragonFly vm/vm_mmap.c,v 1.15
  43  */
  44
  45 #include "opt_compat.h"
  46
  47 #include <sys/param.h>
  48 #include <sys/sysproto.h>
  49 #include <sys/kern_syscall.h>
  50 #include <sys/mman.h>
  51
  52 int
  53 ovadvise(struct ovadvise_args *uap)
  54 {
  55         return (EINVAL);
  56 }
  57
  58 int
  59 ogetpagesize(struct getpagesize_args *uap)
  60 {
  61         uap->sysmsg_result = PAGE_SIZE;
  62         return (0);
  63 }
  64
  65 int
  66 ommap(struct ommap_args *uap)
  67 {
  68         static const char cvtbsdprot[8] = {
  69                 0,
  70                 PROT_EXEC,
  71                 PROT_WRITE,
  72                 PROT_EXEC | PROT_WRITE,
  73                 PROT_READ,
  74                 PROT_EXEC | PROT_READ,
  75                 PROT_WRITE | PROT_READ,
  76                 PROT_EXEC | PROT_WRITE | PROT_READ,
  77         };
  78         int error, flags, prot;
  79
  80 #define OMAP_ANON       0x0002
  81 #define OMAP_COPY       0x0020
  82 #define OMAP_SHARED     0x0010
  83 #define OMAP_FIXED      0x0100
  84 #define OMAP_INHERIT    0x0800
  85
  86         prot = cvtbsdprot[uap->prot & 0x7];
  87         flags = 0;
  88         if (uap->flags & OMAP_ANON)
  89                 flags |= MAP_ANON;
  90         if (uap->flags & OMAP_COPY)
  91                 flags |= MAP_COPY;
  92         if (uap->flags & OMAP_SHARED)
  93                 flags |= MAP_SHARED;
  94         else
  95                 flags |= MAP_PRIVATE;
  96         if (uap->flags & OMAP_FIXED)
  97                 flags |= MAP_FIXED;
  98         if (uap->flags & OMAP_INHERIT)
  99                 flags |= MAP_INHERIT;
 100
 101         prot = cvtbsdprot[uap->prot];
 102         error = kern_mmap(uap->addr, uap->len, prot, flags, uap->fd, uap->pos,
 103             &uap->sysmsg_resultp);
 104
 105         return (error);
 106 }