Conversation
Jarkko Sakkinen
jarkko
Edited 26 days ago
Do rustc eBPF branches unroll loops if they have const limit known by compiler?
I'm just thinking of theory of running tpm2_protocol inside eBPF filter i.e., is it possible and how much effort it would take it realize.
would be just a cool demo
it has lot of characteristics i.e. no-alloc (fully in-stack) and test program compiles without cargo with just rustc.
#linux #kernel #ebpf #rust #tpm
I'm just thinking of theory of running tpm2_protocol inside eBPF filter i.e., is it possible and how much effort it would take it realize.
would be just a cool demo
it has lot of characteristics i.e. no-alloc (fully in-stack) and test program compiles without cargo with just rustc.
#linux #kernel #ebpf #rust #tpm
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@devcoffee there's no need to access tpm i'd just like to know if i can run the parser inside eBPF
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I actually would have to test run it which I might do. It does have fixed-limited loops which I would imagine eBPF compiler to be able to unroll but other than that I'm not sure if there are backward jumps in tpm2_protocol. I'll try this some day :-)
Obviously it will fail when if I deploy it to filter but it is still interesting to see how and where.
Obviously it will fail when if I deploy it to filter but it is still interesting to see how and where.
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