How do I install gdb on Morello?

The GNU debugger gdb has been extended with support for CHERI capabilities. There is a github repo.

For native CheriBSD

If you are using pkg64 there is a special CHERI-aware version of gdb-cheri. This runs as a hybrid-mode executable on Morello CheriBSD.

pkg64 install gdb-cheri

For QEMU with

If you are running emulated CHERI on qemu, you can use the cheribuild target run-morello-purecap and gdb will be built as part of this target. It’s in the directory /usr/local/bin/gdb.