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_protect 9 30.Sh NAME 31.Nm vm_map_protect 32.Nd apply protection bits to a virtual memory region 33.Sh SYNOPSIS 34.In sys/param.h 35.In vm/vm.h 36.In vm/vm_map.h 37.Ft int 38.Fn vm_map_protect "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_prot_t new_prot" "boolean_t set_max" 39.Sh DESCRIPTION 40The 41.Fn vm_map_protect 42function sets the protection bits of the address region bounded by 43.Fa start 44and 45.Fa end 46within the map 47.Fa map 48to 49.Fa new_prot . 50.Pp 51If 52.Fa set_max 53is TRUE, 54.Fa new_prot 55is treated as the new 56.Dv max_protection 57setting for each underlying entry. 58Otherwise, only the 59.Dv protection 60field is affected. 61.Pp 62The range MUST be contiguous, and MUST NOT contain sub-maps. 63.Sh IMPLEMENTATION NOTES 64The function acquires a lock on the 65.Fa map 66for the duration, by calling 67.Xr vm_map_lock . 68.Sh RETURN VALUES 69The 70.Fn vm_map_protect 71function returns 72.Dv KERN_SUCCESS 73if the protection bits could be set successfully. 74.Pp 75If a sub-map entry was encountered in the range, 76.Dv KERN_INVALID_ARGUMENT 77is returned. 78If the value of 79.Fa new_prot 80would exceed 81.Dv max_protection 82for an entry within the range, 83.Dv KERN_PROTECTION_FAILURE 84is returned. 85.Sh SEE ALSO 86.Xr vm_map 9 87.Sh AUTHORS 88This man page was written by 89.An Bruce M Simpson Aq bms@spc.org . 90