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Right. Writing custom microcode can be useful for understanding fine details of the CPU's microarchitecture, which in turn is useful for things ranging from low
by quotemstr 5y ago
Right. Writing custom microcode can be useful for understanding fine details of the CPU's microarchitecture, which in turn is useful for things ranging from low-level optimization to discovering microarchitectural vulnerabilities that don't require custom microcode to exploit.
- yxhuvud 5y agoOr you can treat your Intel processor as a fpga and write instructions that do what you want them to. Unlocking features locked down to higher end machines is also not off the table. So it may or not be a security issue but it makes the machine hackable in a way it hasn't been before.