vm_map_protect(9)

NAME

vm_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_IN

VALID_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>.

BSD July 19, 2003

BSD