On Tue 2018-07-10 15:26:17, Yu-cheng Yu wrote:
> Explain how CET works and the no_cet_shstk/no_cet_ibt kernel
> parameters.
> 

> --- /dev/null
> +++ b/Documentation/x86/intel_cet.txt
> @@ -0,0 +1,250 @@
> +=========================================
> +Control Flow Enforcement Technology (CET)
> +=========================================

We normally use .rst for this kind of formatted text.


> +[6] The implementation of the SHSTK
> +===================================
> +
> +SHSTK size
> +----------
> +
> +A task's SHSTK is allocated from memory to a fixed size that can
> +support 32 KB nested function calls; that is 256 KB for a 64-bit
> +application and 128 KB for a 32-bit application.  The system admin
> +can change the default size.

How does admin change that? We already have ulimit for stack size,
should those be somehow tied together?

$ ulimit -a
...
stack size              (kbytes, -s) 8192


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