dwarf_get_address_size(3) on FreeBSD
The text d32ecb2df2d5, 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.
return the number of bytes needed to represent an address