VM_MAP_LOOKUP(9) BSD Kernel Developer's Manual VM_MAP_LOOKUP(9)NAME
vm_map_lookup, vm_map_lookup_done — lookup the vm_object backing a given
virtual region
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_map.h>
int
vm_map_lookup(vm_map_t *var_map, vm_offset_t vaddr, vm_prot_t fault_type,
vm_map_entry_t *out_entry, vm_object_t *object, vm_pindex_t *pindex,
vm_prot_t *out_prot, boolean_t *wired);
void
vm_map_lookup_done(vm_map_t map, vm_map_entry_t entry);
DESCRIPTION
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.
IMPLEMENTATION NOTES
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.
RETURN VALUES
The vm_map_lookup() function returns KERN_SUCCESS, and sets the *object,
*pindex, *out_prot, and *out_entry arguments appropriately for the hypo‐
thetical page fault.
SEE ALSOvm_map(9)AUTHORS
This manual page was written by Bruce M Simpson ⟨bms@spc.org⟩.
BSD July 19, 2003 BSD
