dwarf_add_fde_inst(3) on FreeBSD
The text 346ed18883f4, 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.
add a call frame instruction to a DWARF frame descriptor