getting crashes when I press a lot of keys. processes with weird stacks too (e.g. a userspace process with sp set to an empty kernel stack), so I suspect either stack overflows or bad returns from kernel mode
a nested interrupt will overwrite the saved registers, so I should probably stash those somewhere when there may be nested interrupts!
(because the kernel typically allocates blocks of about 32 bytes long, and swapping happens once every 4096 bytes. so each allocation has less than 1% chance of triggering a nested exception, and perhaps not all of those cause issues. and most kernel allocation happens before userspace code runs so there are no exception registers to mess up.)
Mastodon is a server for a federated social network: everyone can run a server if they want to, including me. So this is a Mastodon server for me (Vierkantor) and my friends.