dwarf_find_macro_value_start(3) on FreeBSD
The text 2247da75bfaa, 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 address of the first byte of a macro value