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_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⟩.
