proc: add support for setting additional registers on freebsd/amd64 (#2981)
proc: add support for setting additional registers on freebsd/amd64 (#2981)

These are needed for delve to work on freebsd/amd64 with regabi.
go-delve/delve,go-delve/delve,go-delve/delve,go-delve/delve,go-delve/delve