3202feb08a
- Detect at configure time, via the __CET__ C preprocessor macro, whether the C compiler will include either indirect branch tracking (IBT) or shadow stack support, and define a NASM macro (__CET__) if so. - Modify the x86-64 SIMD code so that it includes appropriate endbr64 instructions (to support IBT) and an appropriate .note.gnu.property section (to support both IBT and shadow stack) when __CET__ is defined. Closes #350