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by fweimer
234 days ago
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According to this: https://www.devever.net/~hl/ppcas the POWER approach is not a true hardware capability architecture (“nothing about these ISA extensions provides any kind of security invariant against a party which can generate arbitrary machine code”). It's just something that helps software to store one bit per 128 bits of data on the side (plus some other weirdness about load-with-offset instructions). (SPARC ADI is similar, machine code is still trusted.) |
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