Re: [RFC PATCH v2 05/27] Documentation/x86: Add CET description
From: Pavel Machek <hidden>
Date: 2018-07-11 08:27:46
Also in:
linux-arch, linux-doc, linux-mm, lkml
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.
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--- /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.
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+[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 -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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