VM_MAP_PROTECT(9) BSD Kernel Developer's Manual VM_MAP_PROTECT(9)NAMEvm_map_protect — apply protection bits to a virtual memory region
SYNOPSIS
#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 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 ALSOvm_map(9)AUTHORS
This manual page was written by Bruce M Simpson ⟨bms@spc.org⟩.
BSD July 19, 2003 BSD
