On Mon, Nov 28, 2022 at 10:49:39AM +0100, Ard Biesheuvel wrote: > Prevent abuse of the runtime service wrapper code by avoiding restoring > the shadow call stack pointer from the ordinary stack, or the stack > pointer itself from a GPR. Also, given that the exception recovery > routine is never called in an ordinary way, it doesn't need BTI landing > pads so it can be SYM_CODE rather than SYM_FUNC. Does this mean x18 is now being spilled to the stack? (Do we already spill it in other places?) -- Kees Cook
