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