dwarf_expr_into_block(3) on FreeBSD
The text 47e16c313a3e, as FreeBSD 12.0-RELEASE, FreeBSD 11.4-RELEASE, FreeBSD 11.3-RELEASE, FreeBSD 11.2-RELEASE, FreeBSD 11.1-RELEASE, FreeBSD 11.0-RELEASE shipped it.
retrieve the byte stream for a location expression