The current code results in `error: invalid reassignment of non-absolute variable 'isr_stub_start'`. Use a numbered label instead (as that can be reassigned) and reference the last occurrence using the b suffix.
The current code results in `error: invalid reassignment of non-absolute variable 'isr_stub_start'`. Use a numbered label instead (as that can be reassigned) and reference the last occurrence using the b suffix.