On Thu, Jan 21, 2021 at 02:23:53PM +0100, Julien Thierry wrote:

On 1/21/21 12:08 PM, Ard Biesheuvel wrote:

quoted

I am not aware of any plans to enable this in GCC, but the Clang
implementation is definitely intended for production use (it's a CFI
feature for ROP/JOP mitigation)

I think most people interested in livepatching are using GCC built kernels,
but I could be mistaken (althought in the long run, both compilers should be
supported, and yes, I realize the objtool solution currently only would
support GCC).

There definitely seem to be some users interested in both livepatch and
clang built kernels so it might come up relatively quickly.