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Annotation of sys/compat/common/vm_43.c, Revision 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: }