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Annotation of sys/compat/common/vm_43.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: vm_43.c,v 1.5 2003/06/02 23:27:59 millert Exp $       */
                      2: /*     $NetBSD: vm_43.c,v 1.1 1996/02/05 01:58:29 christos Exp $       */
                      3:
                      4: /*
                      5:  * Copyright (c) 1988 University of Utah.
                      6:  * Copyright (c) 1991, 1993
                      7:  *     The Regents of the University of California.  All rights reserved.
                      8:  *
                      9:  * This code is derived from software contributed to Berkeley by
                     10:  * the Systems Programming Group of the University of Utah Computer
                     11:  * Science Department.
                     12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that the following conditions
                     15:  * are met:
                     16:  * 1. Redistributions of source code must retain the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer.
                     18:  * 2. Redistributions in binary form must reproduce the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer in the
                     20:  *    documentation and/or other materials provided with the distribution.
                     21:  * 3. Neither the name of the University nor the names of its contributors
                     22:  *    may be used to endorse or promote products derived from this software
                     23:  *    without specific prior written permission.
                     24:  *
                     25:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     26:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     27:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     28:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     29:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     30:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     31:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     32:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     33:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     34:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     35:  * SUCH DAMAGE.
                     36:  *
                     37:  * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
                     38:  *
                     39:  *     @(#)vm_mmap.c   8.5 (Berkeley) 5/19/94
                     40:  */
                     41:
                     42: /*
                     43:  * Mapped file (mmap) interface to VM
                     44:  */
                     45:
                     46: #include <sys/param.h>
                     47: #include <sys/systm.h>
                     48: #include <sys/filedesc.h>
                     49: #include <sys/resourcevar.h>
                     50: #include <sys/proc.h>
                     51: #include <sys/vnode.h>
                     52: #include <sys/file.h>
                     53: #include <sys/mman.h>
                     54: #include <sys/conf.h>
                     55:
                     56: #include <sys/mount.h>
                     57: #include <sys/syscallargs.h>
                     58:
                     59: #include <miscfs/specfs/specdev.h>
                     60:
                     61: #include <uvm/uvm_extern.h>
                     62:
                     63: /* ARGSUSED */
                     64: int
                     65: compat_43_sys_getpagesize(p, v, retval)
                     66:        struct proc *p;
                     67:        void *v;
                     68:        register_t *retval;
                     69: {
                     70:
                     71:        *retval = PAGE_SIZE;
                     72:        return (0);
                     73: }
                     74:
                     75: int
                     76: compat_43_sys_mmap(p, v, retval)
                     77:        struct proc *p;
                     78:        void *v;
                     79:        register_t *retval;
                     80: {
                     81:        register struct compat_43_sys_mmap_args /* {
                     82:                syscallarg(caddr_t) addr;
                     83:                syscallarg(size_t) len;
                     84:                syscallarg(int) prot;
                     85:                syscallarg(int) flags;
                     86:                syscallarg(int) fd;
                     87:                syscallarg(long) pos;
                     88:        } */ *uap = v;
                     89:        struct sys_mmap_args /* {
                     90:                syscallarg(caddr_t) addr;
                     91:                syscallarg(size_t) len;
                     92:                syscallarg(int) prot;
                     93:                syscallarg(int) flags;
                     94:                syscallarg(int) fd;
                     95:                syscallarg(long) pad;
                     96:                syscallarg(off_t) pos;
                     97:        } */ nargs;
                     98:        static const char cvtbsdprot[8] = {
                     99:                0,
                    100:                PROT_EXEC,
                    101:                PROT_WRITE,
                    102:                PROT_EXEC|PROT_WRITE,
                    103:                PROT_READ,
                    104:                PROT_EXEC|PROT_READ,
                    105:                PROT_WRITE|PROT_READ,
                    106:                PROT_EXEC|PROT_WRITE|PROT_READ,
                    107:        };
                    108: #define        OMAP_ANON       0x0002
                    109: #define        OMAP_COPY       0x0020
                    110: #define        OMAP_SHARED     0x0010
                    111: #define        OMAP_FIXED      0x0100
                    112: #define        OMAP_INHERIT    0x0800
                    113:
                    114:        SCARG(&nargs, addr) = SCARG(uap, addr);
                    115:        SCARG(&nargs, len) = SCARG(uap, len);
                    116:        SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7];
                    117:        SCARG(&nargs, flags) = 0;
                    118:        if (SCARG(uap, flags) & OMAP_ANON)
                    119:                SCARG(&nargs, flags) |= MAP_ANON;
                    120:        if (SCARG(uap, flags) & OMAP_COPY)
                    121:                SCARG(&nargs, flags) |= MAP_PRIVATE;
                    122:        if (SCARG(uap, flags) & OMAP_SHARED)
                    123:                SCARG(&nargs, flags) |= MAP_SHARED;
                    124:        else
                    125:                SCARG(&nargs, flags) |= MAP_PRIVATE;
                    126:        if (SCARG(uap, flags) & OMAP_FIXED)
                    127:                SCARG(&nargs, flags) |= MAP_FIXED;
                    128:        if (SCARG(uap, flags) & OMAP_INHERIT)
                    129:                SCARG(&nargs, flags) |= MAP_INHERIT;
                    130:        SCARG(&nargs, fd) = SCARG(uap, fd);
                    131:        SCARG(&nargs, pos) = SCARG(uap, pos);
                    132:        return (sys_mmap(p, &nargs, retval));
                    133: }