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VM_MAP_LOOKUP (9) | Kernel routines | Unix Manual Pages | :man

NAME

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

CONTENTS

Synopsis
Description
Implementation Notes
Return Values
See Also
Authors

SYNOPSIS


.In sys/param.h
.In vm/vm.h
.In vm/vm_map.h int
.Fo 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"
.Fc void vm_map_lookup_done "vm_map_t map" "vm_map_entry_t entry"

DESCRIPTION

The vm_map_lookup function attempts to find the
.Vt 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 hypothetical page fault.

SEE ALSO

vm_map(9)

AUTHORS


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