vm_map_lookup, vm_map_lookup_done — lookup the vm_object backing a given virtual region

       This manual page was written by Bruce M Simpson <bms@spc.org>.

Debian                                            July 19, 2003                                 VM_MAP_LOOKUP(9)

       The vm_map_lookup() function attempts to find the vm_object, page index and  protection,  for  the  given
       virtual address vaddr, in the map var_map, assuming a page fault of the type fault_type had occurred.

       Return values are guaranteed until vm_map_lookup_done() is called to release the lock.

       The  function  vm_map_lookup()  acquires  a  read-lock on the map *var_map, but does not release it.  The
       caller should invoke vm_map_lookup_done() in order to release this lock.

       vm_map_lookup, vm_map_lookup_done — lookup the vm_object backing a given virtual region

       The vm_map_lookup() function  returns  KERN_SUCCESS,  and  sets  the  *object,  *pindex,  *out_prot,  and
       *out_entry arguments appropriately for the hypothetical page fault.

vm_map(9)

#include<sys/param.h>#include<vm/vm.h>#include<vm/vm_map.h>intvm_map_lookup(vm_map_t*var_map,   vm_offset_tvaddr,   vm_prot_tfault_type,  vm_map_entry_t*out_entry,
           vm_object_t*object, vm_pindex_t*pindex, vm_prot_t*out_prot, boolean_t*wired);

       voidvm_map_lookup_done(vm_map_tmap, vm_map_entry_tentry);