FreeBSD/Linux Kernel Cross Reference
sys/compat/common/vm_43.c

     /*      $NetBSD: vm_43.c,v 1.16 2007/12/20 23:02:45 dsl Exp $   */
     
     /*
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * the Systems Programming Group of the University of Utah Computer
      * Science Department.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
     *
     *      @(#)vm_mmap.c   8.5 (Berkeley) 5/19/94
     */
    
    /*
     * Copyright (c) 1988 University of Utah.
     *
     * This code is derived from software contributed to Berkeley by
     * the Systems Programming Group of the University of Utah Computer
     * Science Department.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
     *
     *      @(#)vm_mmap.c   8.5 (Berkeley) 5/19/94
     */
    
    /*
     * Mapped file (mmap) interface to VM
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.16 2007/12/20 23:02:45 dsl Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/filedesc.h>
    #include <sys/resourcevar.h>
    #include <sys/proc.h>
    #include <sys/vnode.h>
    #include <sys/file.h>
    #include <sys/mman.h>
    
    #include <sys/mount.h>
    #include <sys/syscallargs.h>
    
    #include <miscfs/specfs/specdev.h>
   
   /* ARGSUSED */
   int
   compat_43_sys_getpagesize(struct lwp *l, const void *v, register_t *retval)
   {
   
           *retval = PAGE_SIZE;
           return (0);
   }
   
   int
   compat_43_sys_mmap(struct lwp *l, const struct compat_43_sys_mmap_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(void *) addr;
                   syscallarg(size_t) len;
                   syscallarg(int) prot;
                   syscallarg(int) flags;
                   syscallarg(int) fd;
                   syscallarg(long) pos;
           } */
           struct sys_mmap_args /* {
                   syscallarg(void *) addr;
                   syscallarg(size_t) len;
                   syscallarg(int) prot;
                   syscallarg(int) flags;
                   syscallarg(int) fd;
                   syscallarg(long) pad;
                   syscallarg(off_t) pos;
           } */ nargs;
           static const char cvtbsdprot[8] = {
                   0,
                   PROT_EXEC,
                   PROT_WRITE,
                   PROT_EXEC|PROT_WRITE,
                   PROT_READ,
                   PROT_EXEC|PROT_READ,
                   PROT_WRITE|PROT_READ,
                   PROT_EXEC|PROT_WRITE|PROT_READ,
           };
   #define OMAP_ANON       0x0002
   #define OMAP_COPY       0x0020
   #define OMAP_SHARED     0x0010
   #define OMAP_FIXED      0x0100
   #define OMAP_INHERIT    0x0800
   
           SCARG(&nargs, addr) = SCARG(uap, addr);
           SCARG(&nargs, len) = SCARG(uap, len);
           /* Note: index using prot is sign-safe due to mask */
           SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7];
           SCARG(&nargs, flags) = 0;
           if (SCARG(uap, flags) & OMAP_ANON)
                   SCARG(&nargs, flags) |= MAP_ANON;
           if (SCARG(uap, flags) & OMAP_COPY)
                   SCARG(&nargs, flags) |= MAP_COPY;
           if (SCARG(uap, flags) & OMAP_SHARED)
                   SCARG(&nargs, flags) |= MAP_SHARED;
           else
                   SCARG(&nargs, flags) |= MAP_PRIVATE;
           if (SCARG(uap, flags) & OMAP_FIXED)
                   SCARG(&nargs, flags) |= MAP_FIXED;
           if (SCARG(uap, flags) & OMAP_INHERIT)
                   SCARG(&nargs, flags) |= MAP_INHERIT;
           SCARG(&nargs, fd) = SCARG(uap, fd);
           SCARG(&nargs, pos) = SCARG(uap, pos);
           return (sys_mmap(l, &nargs, retval));
   }

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