OF_xref_from_node(9) on FreeBSD
The text 4ddce6cd3584, as FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 14.0-RELEASE, FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE shipped it.
convert between kernel phandle and effective phandle