mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-27 11:55:06 +00:00
71 lines
2.5 KiB
Groff
71 lines
2.5 KiB
Groff
.\"
|
|
.\" 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 bms@spc.org .
|