I still hope we can revert that once we have complete, CPU-verified backtraces. As a linked list, frame pointers are still somewhat slow. Just copying the hardw

I still hope we can revert that once we have complete, CPU-verified backtraces. As a linked list, frame pointers are still somewhat slow. Just copying the hardware address stack should be quite a bit faster, and more importantly, the CPU will enforce that the addresses are correct.