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Man Pages


Manual Reference Pages  -  VM_MAP_PROTECT (9)

NAME

vm_map_protect - apply protection bits to a virtual memory region

CONTENTS

Synopsis
Description
Implementation Notes
Return Values
See Also
Authors

SYNOPSIS


.In sys/param.h
.In vm/vm.h
.In vm/vm_map.h int
.Fo vm_map_protect vm_map_t map vm_offset_t start vm_offset_t end vm_prot_t new_prot boolean_t set_max
.Fc

DESCRIPTION

The vm_map_protect function sets the protection bits of the address region bounded by start and end within the map map to new_prot.

If set_max is TRUE, new_prot is treated as the new max_protection setting for each underlying entry. Otherwise, only the protection field is affected.

The range MUST be contiguous, and MUST NOT contain sub-maps.

IMPLEMENTATION NOTES

The function acquires a lock on the map for the duration, by calling vm_map_lock(9).

RETURN VALUES

The vm_map_protect function returns KERN_SUCCESS if the protection bits could be set successfully.

If a sub-map entry was encountered in the range, KERN_INVALID_ARGUMENT is returned. If the value of new_prot would exceed max_protection for an entry within the range, KERN_PROTECTION_FAILURE is returned.

SEE ALSO

vm_map(9)

AUTHORS

This manual page was written by
.An Bruce M Simpson Aq bms@spc.org .
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