2003-09-30 00:51:31 +00:00
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.\"
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.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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.\" All rights reserved.
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.\"
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" notice, this list of conditions and the following disclaimer.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" $FreeBSD$
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.\"
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.Dd July 19, 2003
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2004-07-06 06:53:42 +00:00
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.Dt VM_MAP_PROTECT 9
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2004-07-06 07:02:31 +00:00
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.Os
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2003-09-30 00:51:31 +00:00
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.Sh NAME
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.Nm vm_map_protect
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.Nd apply protection bits to a virtual memory region
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.Sh SYNOPSIS
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.In sys/param.h
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.In vm/vm.h
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.In vm/vm_map.h
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.Ft int
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2004-07-06 06:53:42 +00:00
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.Fo vm_map_protect
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.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_prot_t new_prot"
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.Fa "boolean_t set_max"
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.Fc
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2003-09-30 00:51:31 +00:00
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.Sh DESCRIPTION
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The
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.Fn vm_map_protect
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function sets the protection bits of the address region bounded by
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.Fa start
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and
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.Fa end
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within the map
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.Fa map
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to
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.Fa new_prot .
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.Pp
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If
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.Fa set_max
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is TRUE,
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.Fa new_prot
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is treated as the new
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2004-07-06 06:53:42 +00:00
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.Va max_protection
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2003-09-30 00:51:31 +00:00
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setting for each underlying entry.
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Otherwise, only the
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2004-07-06 06:53:42 +00:00
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.Va protection
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2003-09-30 00:51:31 +00:00
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field is affected.
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.Pp
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The range MUST be contiguous, and MUST NOT contain sub-maps.
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.Sh IMPLEMENTATION NOTES
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The function acquires a lock on the
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.Fa map
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for the duration, by calling
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2004-07-06 06:53:42 +00:00
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.Xr vm_map_lock 9 .
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2003-09-30 00:51:31 +00:00
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.Sh RETURN VALUES
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The
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.Fn vm_map_protect
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function returns
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.Dv KERN_SUCCESS
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if the protection bits could be set successfully.
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.Pp
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If a sub-map entry was encountered in the range,
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.Dv KERN_INVALID_ARGUMENT
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is returned.
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If the value of
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.Fa new_prot
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would exceed
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2004-07-06 06:53:42 +00:00
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.Va max_protection
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2003-09-30 00:51:31 +00:00
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for an entry within the range,
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.Dv KERN_PROTECTION_FAILURE
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is returned.
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.Sh SEE ALSO
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.Xr vm_map 9
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.Sh AUTHORS
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2005-06-28 20:15:19 +00:00
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This manual page was written by
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2014-06-26 21:44:30 +00:00
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.An Bruce M Simpson Aq Mt bms@spc.org .
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