167 lines
5.9 KiB
C
167 lines
5.9 KiB
C
/* $NetBSD: vm_43.c,v 1.16 2007/12/20 23:02:45 dsl Exp $ */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
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*
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* @(#)vm_mmap.c 8.5 (Berkeley) 5/19/94
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*/
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/*
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* Copyright (c) 1988 University of Utah.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
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*
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* @(#)vm_mmap.c 8.5 (Berkeley) 5/19/94
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*/
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/*
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* Mapped file (mmap) interface to VM
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.16 2007/12/20 23:02:45 dsl Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/filedesc.h>
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#include <sys/resourcevar.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/mman.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <miscfs/specfs/specdev.h>
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/* ARGSUSED */
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int
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compat_43_sys_getpagesize(struct lwp *l, const void *v, register_t *retval)
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{
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*retval = PAGE_SIZE;
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return (0);
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}
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int
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compat_43_sys_mmap(struct lwp *l, const struct compat_43_sys_mmap_args *uap, register_t *retval)
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{
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/* {
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syscallarg(void *) addr;
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syscallarg(size_t) len;
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syscallarg(int) prot;
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syscallarg(int) flags;
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syscallarg(int) fd;
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syscallarg(long) pos;
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} */
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struct sys_mmap_args /* {
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syscallarg(void *) addr;
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syscallarg(size_t) len;
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syscallarg(int) prot;
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syscallarg(int) flags;
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syscallarg(int) fd;
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syscallarg(long) pad;
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syscallarg(off_t) pos;
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} */ nargs;
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static const char cvtbsdprot[8] = {
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0,
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PROT_EXEC,
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PROT_WRITE,
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PROT_EXEC|PROT_WRITE,
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PROT_READ,
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PROT_EXEC|PROT_READ,
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PROT_WRITE|PROT_READ,
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PROT_EXEC|PROT_WRITE|PROT_READ,
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};
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#define OMAP_ANON 0x0002
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#define OMAP_COPY 0x0020
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#define OMAP_SHARED 0x0010
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#define OMAP_FIXED 0x0100
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#define OMAP_INHERIT 0x0800
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SCARG(&nargs, addr) = SCARG(uap, addr);
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SCARG(&nargs, len) = SCARG(uap, len);
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/* Note: index using prot is sign-safe due to mask */
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SCARG(&nargs, prot) = cvtbsdprot[SCARG(uap, prot)&0x7];
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SCARG(&nargs, flags) = 0;
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if (SCARG(uap, flags) & OMAP_ANON)
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SCARG(&nargs, flags) |= MAP_ANON;
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if (SCARG(uap, flags) & OMAP_COPY)
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SCARG(&nargs, flags) |= MAP_COPY;
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if (SCARG(uap, flags) & OMAP_SHARED)
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SCARG(&nargs, flags) |= MAP_SHARED;
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else
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SCARG(&nargs, flags) |= MAP_PRIVATE;
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if (SCARG(uap, flags) & OMAP_FIXED)
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SCARG(&nargs, flags) |= MAP_FIXED;
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if (SCARG(uap, flags) & OMAP_INHERIT)
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SCARG(&nargs, flags) |= MAP_INHERIT;
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SCARG(&nargs, fd) = SCARG(uap, fd);
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SCARG(&nargs, pos) = SCARG(uap, pos);
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return (sys_mmap(l, &nargs, retval));
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}
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