This old article has been offline for a while, just got back online:
https://code.bluestop.org/w/tianocore/debugging-with-gdb/
This is a new article:
https://github.com/tianocore/tianocore.github.io/wiki/How-to-debug-OVMF-with-QEMU-using-GDB
This is not new, but is still useful:
https://github.com/tianocore/tianocore.github.io/wiki/Testing-SMM-with-QEMU,-KVM-and-libvirt
