DOOM in the kernel, or fibers in eBPF

Show HN: DOOM in the kernel, or fibers in eBPF

DOOM in the kernel, or fibers in eBPF is a business in show hn launch.

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Some time ago my coworker who was working on first version of Perforator (https://github.com/yandex/perforator) kept talking about eBPF, so I got curious about its ISA and restrictions. That was around the time I read about DOOM on pregnancy test, so I thought: "what if someone run DOOM inside of Linux kernel in eBPF? Surely, with some restrictions, this should still be possible?"I started to play around with it somewhere in 2024 - first stripping DOOM to bare minimum that is needed for showcase, simplifying code and trying to pass first restrictions that I encountered - function limit, recursion, memory access and checks. I tried to do this by hand, but it was, well, tedious labor. So I cha

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Website: ayles.github.io/doom-in-kernel