I was able to run the code both with an actual device and with qemu, but how can you debug this? gdb doesn’t have symbols so I can’t setup breakpoints, while radare2 says “Sorry. No debugger backend available.” when launching in debug mode.
Anyway with radare2 I’m able to see the assembly code (which for me seems pretty crazy).
Did you solve it without debugging?
This is my last retro, it seems very interesting but I am probably missing something XD