1 /* $NetBSD: vm_43.c,v 1.17 2011/01/19 10:21:16 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$ 36 * 37 * @(#)vm_mmap.c 8.5 (Berkeley) 5/19/94 38 */ 39 40 /* 41 * Copyright (c) 1988 University of Utah. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * the Systems Programming Group of the University of Utah Computer 45 * Science Department. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the University of 58 * California, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 * 75 * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$ 76 * 77 * @(#)vm_mmap.c 8.5 (Berkeley) 5/19/94 78 */ 79 80 /* 81 * Mapped file (mmap) interface to VM 82 */ 83 84 #include <sys/cdefs.h> 85 __KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.17 2011/01/19 10:21:16 tsutsui Exp $"); 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/filedesc.h> 90 #include <sys/resourcevar.h> 91 #include <sys/proc.h> 92 #include <sys/vnode.h> 93 #include <sys/file.h> 94 #include <sys/mman.h> 95 96 #include <sys/syscallargs.h> 97 98 #include <miscfs/specfs/specdev.h> 99 100 /* ARGSUSED */ 101 int 102 compat_43_sys_getpagesize(struct lwp *l, const void *v, register_t *retval) 103 { 104 105 *retval = PAGE_SIZE; 106 return (0); 107 } 108 109 int 110 compat_43_sys_mmap(struct lwp *l, const struct compat_43_sys_mmap_args *uap, register_t *retval) 111 { 112 /* { 113 syscallarg(void *) addr; 114 syscallarg(size_t) len; 115 syscallarg(int) prot; 116 syscallarg(int) flags; 117 syscallarg(int) fd; 118 syscallarg(long) pos; 119 } */ 120 struct sys_mmap_args /* { 121 syscallarg(void *) addr; 122 syscallarg(size_t) len; 123 syscallarg(int) prot; 124 syscallarg(int) flags; 125 syscallarg(int) fd; 126 syscallarg(long) pad; 127 syscallarg(off_t) pos; 128 } */ nargs; 129 static const char cvtbsdprot[8] = { 130 0, 131 PROT_EXEC, 132 PROT_WRITE, 133 PROT_EXEC|PROT_WRITE, 134 PROT_READ, 135 PROT_EXEC|PROT_READ, 136 PROT_WRITE|PROT_READ, 137 PROT_EXEC|PROT_WRITE|PROT_READ, 138 }; 139 #define OMAP_ANON 0x0002 140 #define OMAP_COPY 0x0020 141 #define OMAP_SHARED 0x0010 142 #define OMAP_FIXED 0x0100 143 #define OMAP_INHERIT 0x0800 144 145 SCARG(&nargs, addr) = SCARG(uap, addr); 146 SCARG(&nargs, len) = SCARG(uap, len); 147 /* Note: index using prot is sign-safe due to mask */ 148 SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7]; 149 SCARG(&nargs, flags) = 0; 150 if (SCARG(uap, flags) & OMAP_ANON) 151 SCARG(&nargs, flags) |= MAP_ANON; 152 if (SCARG(uap, flags) & OMAP_COPY) 153 SCARG(&nargs, flags) |= MAP_COPY; 154 if (SCARG(uap, flags) & OMAP_SHARED) 155 SCARG(&nargs, flags) |= MAP_SHARED; 156 else 157 SCARG(&nargs, flags) |= MAP_PRIVATE; 158 if (SCARG(uap, flags) & OMAP_FIXED) 159 SCARG(&nargs, flags) |= MAP_FIXED; 160 if (SCARG(uap, flags) & OMAP_INHERIT) 161 SCARG(&nargs, flags) |= MAP_INHERIT; 162 SCARG(&nargs, fd) = SCARG(uap, fd); 163 SCARG(&nargs, pos) = SCARG(uap, pos); 164 return (sys_mmap(l, &nargs, retval)); 165 } 166