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+.\"
+.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd July 19, 2003
+.Dt VM_MAP_CHECK_PROTECTION 9
+.Os
+.Sh NAME
+.Nm vm_map_check_protection
+.Nd check memory protection for a vm_map
+.Sh SYNOPSIS
+.In sys/param.h
+.In vm/vm.h
+.In vm/vm_map.h
+.Ft boolean_t
+.Fo vm_map_check_protection
+.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_prot_t protection"
+.Fc
+.Sh DESCRIPTION
+The
+.Fn vm_map_check_protection
+function asserts that the target
+.Fa map
+allows the specified privilege
+.Fa protection
+over the entire address range from
+.Fa start
+to
+.Fa end .
+The region MUST be contiguous; no holes are allowed.
+.Sh IMPLEMENTATION NOTES
+This code does not and SHOULD not check whether the contents of
+the region are accessible.
+For example, a small file may be mapped into an address space which
+is significantly larger in size.
+.Sh RETURN VALUES
+The
+.Fn vm_map_check_protection
+function returns TRUE if the privilege is allowed; if it is not allowed,
+or if any other error occurred, the value FALSE is returned.
+.Sh SEE ALSO
+.Xr munmap 2 ,
+.Xr vm_map 9 ,
+.Xr vm_map_protect 9
+.Sh AUTHORS
+This manual page was written by
+.An Bruce M Simpson Aq Mt bms@spc.org .