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.Os 31.Sh NAME 32.Nm vm_map_protect 33.Nd apply protection bits to a virtual memory region 34.Sh SYNOPSIS 35.In sys/param.h 36.In vm/vm.h 37.In vm/vm_map.h 38.Ft int 39.Fo vm_map_protect 40.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_prot_t new_prot" 41.Fa "boolean_t set_max" 42.Fc 43.Sh DESCRIPTION 44The 45.Fn vm_map_protect 46function sets the protection bits of the address region bounded by 47.Fa start 48and 49.Fa end 50within the map 51.Fa map 52to 53.Fa new_prot . 54.Pp 55If 56.Fa set_max 57is TRUE, 58.Fa new_prot 59is treated as the new 60.Va max_protection 61setting for each underlying entry. 62Otherwise, only the 63.Va protection 64field is affected. 65.Pp 66The range MUST be contiguous, and MUST NOT contain sub-maps. 67.Sh IMPLEMENTATION NOTES 68The function acquires a lock on the 69.Fa map 70for the duration, by calling 71.Xr vm_map_lock 9 . 72.Sh RETURN VALUES 73The 74.Fn vm_map_protect 75function returns 76.Dv KERN_SUCCESS 77if the protection bits could be set successfully. 78.Pp 79If a sub-map entry was encountered in the range, 80.Dv KERN_INVALID_ARGUMENT 81is returned. 82If the value of 83.Fa new_prot 84would exceed 85.Va max_protection 86for an entry within the range, 87.Dv KERN_PROTECTION_FAILURE 88is returned. 89.Sh SEE ALSO 90.Xr vm_map 9 91.Sh AUTHORS 92This manual page was written by 93.An Bruce M Simpson Aq Mt bms@spc.org . 94