On Thu, Feb 03, 2022 at 02:23:43PM -0800, H.J. Lu wrote:

On Thu, Feb 3, 2022 at 1:58 PM John Allen [off-list ref] wrote:

quoted

On Sun, Jan 30, 2022 at 01:18:38PM -0800, Rick Edgecombe wrote:

quoted

Shadow stack is supported on newer AMD processors, but the kernel
implementation has not been tested on them. Prevent basic issues from
showing up for normal users by disabling shadow stack on all CPUs except
Intel until it has been tested. At which point the limitation should be
removed.

Hi Rick,

I have been testing Yu-Cheng's patchsets on AMD hardware and I am
working on testing this version now. How are you testing this new
series? I can partially test by calling the prctl enable for shadow
stack directly from a program, but I'm not sure how useful that's going
to be without the glibc support. Do you have a public repo with the
necessary glibc changes to enable shadow stack early?

The glibc CET branch is at

https://gitlab.com/x86-glibc/glibc/-/commits/users/hjl/cet/master

Thanks, I ran some smoke tests with the updated glibc and it's looking
good so far. Additionally, I ran the new kselftest and it passed.

Thanks,
John

-- 
H.J.