Re: [PATCH v7 31/41] x86/shstk: Introduce routines modifying shstk

On Thu, Mar 09, 2023 at 05:03:26PM +0000, Edgecombe, Rick P wrote:

On Thu, 2023-03-09 at 17:48 +0100, Borislav Petkov wrote:

quoted

On Mon, Feb 27, 2023 at 02:29:47PM -0800, Rick Edgecombe wrote:

quoted

From: Yu-cheng Yu <redacted>

Shadow stacks are normally written to via CALL/RET or specific CET

                                       ^
                                       indirectly.

Dunno here, RSTORSSP/SAVEPREVSSP are kind of direct.

quoted

quoted

instructions like RSTORSSP/SAVEPREVSSP. However during some Linux
operations the kernel will need to write to directly using the

						  ^^^^^^^^^

Yes, I was trying to make the contrast more obvious because you say
"directly" here.

But not too important.

-- 
Regards/Gruss,
    Boris.

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