Another one (and it's a doozie) is that thread debugging won't work
due to the ABI specific libthread_db.so library that's dlopen'd by
RDA. A native GDB (assuming that we did the necessary work to port it
to mips64-linux) would have the same problem. We've kicked around
some ideas for fixing this problem in the past. The only idea that
I've found compelling is from Alex Oliva (and perhaps others) who
suggested that it may be best for a "native" gdb to spawn an
ABI-specific rda or gdbserver and connect to it automatically.
TBH, I'd rather like to see us develop an extended and more extensible
remote protocol (on any number of people's TODO lists already!) and do
_all_ native debugging this way.