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VM_MAP_PROTECT(9) | Kernel Developer's Manual | VM_MAP_PROTECT(9) |
NAME¶
vm_map_protect — apply protection bits to a virtual memory regionSYNOPSIS¶
#include <sys/param.h>#include <vm/vm.h>
#include <vm/vm_map.h> int
vm_map_protect(vm_map_t map, vm_offset_t start, vm_offset_t end, vm_prot_t new_prot, boolean_t set_max);
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 returnsKERN_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 Bruce M Simpson ⟨bms@spc.org⟩.July 19, 2003 | Debian |