Clever Hack Finds Mystery CPU Instructions

Re:Clever Hack Finds Mystery CPU Instructions by crdotson on Saturday April 24, 2021 @08:22AM (#26924375)

I know very little about this field, but I guess I’m surprised that the table of instructions can’t be found by looking at a microcode update file.

[ Parent | on HN ]

Re:Clever Hack Finds Mystery CPU Instructions by dboreham on Saturday April 24, 2021 @11:36AM (#26925636)

Aren't those encrypted?

[ Parent | on HN ]

Re:Clever Hack Finds Mystery CPU Instructions by colejohnson66 on Saturday April 24, 2021 @02:45PM (#26927315)

Yes, but also: the update file doesn’t contain everything, but just what needs changing. So if these undocumented ones aren’t in the file, that doesn’t mean they don’t exist.

[ Parent | on HN ]