freebsd man page for vm_map_protect

VM_MAP_PROTECT(9)					   BSD Kernel Developer's Manual					 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_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>.

BSD
								   July 19, 2003							       BSD