1.\" 2.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd July 19, 2003 29.Dt VM_MAP_CHECK_PROTECTION 9 30.Os 31.Sh NAME 32.Nm vm_map_check_protection 33.Nd check memory protection for a vm_map 34.Sh SYNOPSIS 35.In sys/param.h 36.In vm/vm.h 37.In vm/vm_map.h 38.Ft boolean_t 39.Fo vm_map_check_protection 40.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_prot_t protection" 41.Fc 42.Sh DESCRIPTION 43The 44.Fn vm_map_check_protection 45function asserts that the target 46.Fa map 47allows the specified privilege 48.Fa protection 49over the entire address range from 50.Fa start 51to 52.Fa end . 53The region MUST be contiguous; no holes are allowed. 54.Sh IMPLEMENTATION NOTES 55This code does not and SHOULD not check whether the contents of 56the region are accessible. 57For example, a small file may be mapped into an address space which 58is significantly larger in size. 59.Sh RETURN VALUES 60The 61.Fn vm_map_check_protection 62function returns TRUE if the privilege is allowed; if it is not allowed, 63or if any other error occurred, the value FALSE is returned. 64.Sh SEE ALSO 65.Xr munmap 2 , 66.Xr vm_map 9 , 67.Xr vm_map_protect 9 68.Sh AUTHORS 69This manual page was written by 70.An Bruce M Simpson Aq Mt bms@spc.org . 71