https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81708
--- Comment #2 from Andy Lutomirski <luto at kernel dot org> --- (In reply to H. Peter Anvin from comment #1) > Well, you can choose between "__stack_chk_guard(%rip)" and "%gs:40"... :) Wow, I guess I didn't even consider the former. That would be option 5: symbol(%rip). Let's not use it for the kernel. For x86_32, we want %fs:symbol. %fs:constant would be tolarable, too. For x86_64, it depends on the end game for percpu access, I suppose.
