sys/emulation/43bsd/43bsd_vm.c

   1 /*
   2  * (MPSAFE)
   3  *
   4  * 43BSD_VM.C           - 4.3BSD compatibility virtual memory syscalls
   5  *
   6  * Copyright (c) 1988 University of Utah.
   7  * Copyright (c) 1991, 1993
   8  *      The Regents of the University of California.  All rights reserved.
   9  *
  10  * This code is derived from software contributed to Berkeley by
  11  * the Systems Programming Group of the University of Utah Computer
  12  * Science Department.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  * $DragonFly: src/sys/emulation/43bsd/43bsd_vm.c,v 1.4 2006/09/17 21:07:25 dillon Exp $
  39  *      from: DragonFly vm/vm_unix.c,v 1.3
  40  *      from: DragonFly vm/vm_mmap.c,v 1.15
  41  */
  42
  43 #include "opt_compat.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/sysproto.h>
  47 #include <sys/kern_syscall.h>
  48 #include <sys/mman.h>
  49 #include <sys/proc.h>
  50
  51 #include <sys/thread.h>
  52 #include <sys/thread2.h>
  53
  54 /*
  55  * No requirements
  56  */
  57 int
  58 sys_ovadvise(struct ovadvise_args *uap)
  59 {
  60         return (EINVAL);
  61 }
  62
  63 /*
  64  * No requirements
  65  */
  66 int
  67 sys_ogetpagesize(struct getpagesize_args *uap)
  68 {
  69         uap->sysmsg_iresult = PAGE_SIZE;
  70         return (0);
  71 }
  72
  73 /*
  74  * No requirements
  75  */
  76 int
  77 sys_ommap(struct ommap_args *uap)
  78 {
  79         static const char cvtbsdprot[8] = {
  80                 0,
  81                 PROT_EXEC,
  82                 PROT_WRITE,
  83                 PROT_EXEC | PROT_WRITE,
  84                 PROT_READ,
  85                 PROT_EXEC | PROT_READ,
  86                 PROT_WRITE | PROT_READ,
  87                 PROT_EXEC | PROT_WRITE | PROT_READ,
  88         };
  89         int error, flags, prot;
  90
  91 #define OMAP_ANON       0x0002
  92 #define OMAP_COPY       0x0020
  93 #define OMAP_SHARED     0x0010
  94 #define OMAP_FIXED      0x0100
  95 #define OMAP_INHERIT    0x0800
  96
  97         prot = cvtbsdprot[uap->prot & 0x7];
  98         flags = 0;
  99         if (uap->flags & OMAP_ANON)
 100                 flags |= MAP_ANON;
 101         if (uap->flags & OMAP_COPY)
 102                 flags |= MAP_COPY;
 103         if (uap->flags & OMAP_SHARED)
 104                 flags |= MAP_SHARED;
 105         else
 106                 flags |= MAP_PRIVATE;
 107         if (uap->flags & OMAP_FIXED)
 108                 flags |= MAP_FIXED;
 109         if (uap->flags & OMAP_INHERIT)
 110                 flags |= MAP_INHERIT;
 111
 112         error = kern_mmap(curproc->p_vmspace, uap->addr, uap->len,
 113                           prot, flags, uap->fd, uap->pos,
 114                           &uap->sysmsg_resultp);
 115
 116         return (error);
 117 }