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vm_43.c revision 1.7 
      1 /*	$NetBSD: vm_43.c,v 1.7 2001/11/13 02:08:06 lukem Exp $	*/
      2 
      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  * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
     41  *
     42  *	@(#)vm_mmap.c	8.5 (Berkeley) 5/19/94
     43  */
     44 
     45 /*
     46  * Mapped file (mmap) interface to VM
     47  */
     48 
     49 #include <sys/cdefs.h>
     50 __KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.7 2001/11/13 02:08:06 lukem Exp $");
     51 
     52 #include <sys/param.h>
     53 #include <sys/systm.h>
     54 #include <sys/filedesc.h>
     55 #include <sys/resourcevar.h>
     56 #include <sys/proc.h>
     57 #include <sys/vnode.h>
     58 #include <sys/file.h>
     59 #include <sys/mman.h>
     60 
     61 #include <sys/mount.h>
     62 #include <sys/syscallargs.h>
     63 
     64 #include <miscfs/specfs/specdev.h>
     65 
     66 /* ARGSUSED */
     67 int
     68 compat_43_sys_getpagesize(p, v, retval)
     69 	struct proc *p;
     70 	void *v;
     71 	register_t *retval;
     72 {
     73 
     74 	*retval = PAGE_SIZE;
     75 	return (0);
     76 }
     77 
     78 int
     79 compat_43_sys_mmap(p, v, retval)
     80 	struct proc *p;
     81 	void *v;
     82 	register_t *retval;
     83 {
     84 	struct compat_43_sys_mmap_args /* {
     85 		syscallarg(caddr_t) addr;
     86 		syscallarg(size_t) len;
     87 		syscallarg(int) prot;
     88 		syscallarg(int) flags;
     89 		syscallarg(int) fd;
     90 		syscallarg(long) pos;
     91 	} */ *uap = v;
     92 	struct sys_mmap_args /* {
     93 		syscallarg(caddr_t) addr;
     94 		syscallarg(size_t) len;
     95 		syscallarg(int) prot;
     96 		syscallarg(int) flags;
     97 		syscallarg(int) fd;
     98 		syscallarg(long) pad;
     99 		syscallarg(off_t) pos;
    100 	} */ nargs;
    101 	static const char cvtbsdprot[8] = {
    102 		0,
    103 		PROT_EXEC,
    104 		PROT_WRITE,
    105 		PROT_EXEC|PROT_WRITE,
    106 		PROT_READ,
    107 		PROT_EXEC|PROT_READ,
    108 		PROT_WRITE|PROT_READ,
    109 		PROT_EXEC|PROT_WRITE|PROT_READ,
    110 	};
    111 #define	OMAP_ANON	0x0002
    112 #define	OMAP_COPY	0x0020
    113 #define	OMAP_SHARED	0x0010
    114 #define	OMAP_FIXED	0x0100
    115 #define	OMAP_INHERIT	0x0800
    116 
    117 	SCARG(&nargs, addr) = SCARG(uap, addr);
    118 	SCARG(&nargs, len) = SCARG(uap, len);
    119 	SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7];
    120 	SCARG(&nargs, flags) = 0;
    121 	if (SCARG(uap, flags) & OMAP_ANON)
    122 		SCARG(&nargs, flags) |= MAP_ANON;
    123 	if (SCARG(uap, flags) & OMAP_COPY)
    124 		SCARG(&nargs, flags) |= MAP_COPY;
    125 	if (SCARG(uap, flags) & OMAP_SHARED)
    126 		SCARG(&nargs, flags) |= MAP_SHARED;
    127 	else
    128 		SCARG(&nargs, flags) |= MAP_PRIVATE;
    129 	if (SCARG(uap, flags) & OMAP_FIXED)
    130 		SCARG(&nargs, flags) |= MAP_FIXED;
    131 	if (SCARG(uap, flags) & OMAP_INHERIT)
    132 		SCARG(&nargs, flags) |= MAP_INHERIT;
    133 	SCARG(&nargs, fd) = SCARG(uap, fd);
    134 	SCARG(&nargs, pos) = SCARG(uap, pos);
    135 	return (sys_mmap(p, &nargs, retval));
    136 }
    137