is it just me or did SPECTRE manifest @halvarflake's "weird machine" concept in real hardware? i hope someone's already working on a paper about the computational power of this machine.
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yeah, it is a bit more complicated in this case. the weird state is already entered when the CPU fails to do what the implementor thought/intended it would do; the ifsm for OS would not include kernel/user or user/user side channels?
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but the CPU will always be doing some stuff the implementor didn't specify, which is the whole reason you introduced transitory states. which part of an attack crosses the line from transitory to weird for you? the timing measurement that turns uarch state into arch state?
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Wouldn't output be normal according to spec? Perhaps the weird machine is defined by adding timing to the spec of the normal machine, allowing storage of data in the timing measurement. Weird machine is programmed by entering transitory states in normal machine. No?
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