2 .\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
3 .\" All rights reserved.
5 .\" Redistribution and use in source and binary forms, with or without
6 .\" modification, are permitted provided that the following conditions
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.
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
33 .Nd apply protection bits to a virtual memory region
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"
46 function sets the protection bits of the address region bounded by
54 The value specified by
56 may not include any protection bits that are not set in
58 on every entry within the range.
66 setting for each underlying entry.
67 Protection bits not included
69 will be cleared from existing entries.
76 The range MUST be contiguous, and MUST NOT contain sub-maps.
77 .Sh IMPLEMENTATION NOTES
78 The function acquires a lock on the
80 for the duration, by calling
87 if the protection bits could be set successfully.
89 If a sub-map entry was encountered in the range,
90 .Dv KERN_INVALID_ARGUMENT
96 for an entry within the range,
97 .Dv KERN_PROTECTION_FAILURE
99 If a copy-on-write mapping is transitioned from read-only to
100 read-write, and too little swap space is available for backing the
102 .Dv KERN_RESOURCE_SHORTAGE
107 This manual page was written by
108 .An Bruce M Simpson Aq Mt bms@spc.org .