[$] Adding kernel control-flow-integrity checking to GCC

While many developers are struggling to keep up with the flood ofvulnerability reports, others are still focused on preventing those reportsfrom happening in the first place. Control-flow integrity (CFI) is theterm for preventing (or at least detecting) exploits that divert the flowof control from its intended paths. At the 2026 GNU Tools Cauldron, Kees Cookpresented his changes to the GCC compiler suite to support forward-edge CFIfor the kernel.