Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
VM_MAP_LOOKUP(9)       FreeBSD 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 ALSO
     vm_map(9)

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

FreeBSD	10.1			 July 19, 2003			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | RETURN VALUES | SEE ALSO | AUTHORS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=vm_map_lookup&sektion=9&manpath=FreeBSD+9.2-RELEASE>

home | help