If you take the saved
pc in the stack frame for
main and subtract it from the saved
lr in the stack frame for
diff, what do you get? Express your answer as a number, then explain conceptually what that computation represents.
Why will loopback mode only work if you plug in both
Running bare metal on the Pi as we do, there is no circumstance under which an invalid call to
strlen (e.g. argument is an invalid address or unterminated string) has a visible bad consequence at runtime. Why not?