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 1.4 2006/09/17 21:07:25 dillon 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 #include <sys/proc.h>
  52
  53 #include <sys/thread2.h>
  54 #include <sys/mplock2.h>
  55
  56 /*
  57  * MPSAFE
  58  */
  59 int
  60 sys_ovadvise(struct ovadvise_args *uap)
  61 {
  62         return (EINVAL);
  63 }
  64
  65 /*
  66  * MPSAFE
  67  */
  68 int
  69 sys_ogetpagesize(struct getpagesize_args *uap)
  70 {
  71         uap->sysmsg_iresult = PAGE_SIZE;
  72         return (0);
  73 }
  74
  75 /*
  76  * MPSAFE
  77  */
  78 int
  79 sys_ommap(struct ommap_args *uap)
  80 {
  81         static const char cvtbsdprot[8] = {
  82                 0,
  83                 PROT_EXEC,
  84                 PROT_WRITE,
  85                 PROT_EXEC | PROT_WRITE,
  86                 PROT_READ,
  87                 PROT_EXEC | PROT_READ,
  88                 PROT_WRITE | PROT_READ,
  89                 PROT_EXEC | PROT_WRITE | PROT_READ,
  90         };
  91         int error, flags, prot;
  92
  93 #define OMAP_ANON       0x0002
  94 #define OMAP_COPY       0x0020
  95 #define OMAP_SHARED     0x0010
  96 #define OMAP_FIXED      0x0100
  97 #define OMAP_INHERIT    0x0800
  98
  99         prot = cvtbsdprot[uap->prot & 0x7];
 100         flags = 0;
 101         if (uap->flags & OMAP_ANON)
 102                 flags |= MAP_ANON;
 103         if (uap->flags & OMAP_COPY)
 104                 flags |= MAP_COPY;
 105         if (uap->flags & OMAP_SHARED)
 106                 flags |= MAP_SHARED;
 107         else
 108                 flags |= MAP_PRIVATE;
 109         if (uap->flags & OMAP_FIXED)
 110                 flags |= MAP_FIXED;
 111         if (uap->flags & OMAP_INHERIT)
 112                 flags |= MAP_INHERIT;
 113
 114         get_mplock();
 115         error = kern_mmap(curproc->p_vmspace, uap->addr, uap->len,
 116                           prot, flags, uap->fd, uap->pos,
 117                           &uap->sysmsg_resultp);
 118         rel_mplock();
 119
 120         return (error);
 121 }