Messages in this thread | | | Subject | Re: [PATCH v11 6/9] x86/cet: Add PTRACE interface for CET | From | Dave Hansen <> | Date | Thu, 3 Sep 2020 09:42:28 -0700 |
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On 9/3/20 9:32 AM, Andy Lutomirski wrote: >> Taking the config register out of the init state is illogical, as is >> writing to SSP while the config register is in its init state. > What's so special about the INIT state? It's optimized by XSAVES, but > it's just a number, right? So taking the register out of the INIT > state is kind of like saying "gdb wanted to set xmm0 to (0,0,0,1), but > it was in the INIT state to begin with", right?
Yeah, that's a good point. The init state shouldn't be special, as the hardware is within its right to choose not to use the init optimization at any time.
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