Intel last year released a preview of their Control-flow Enforcement Technology instructions, which appear to implement these proposed extensions (shadow stack

Intel last year released a preview of their Control-flow Enforcement Technology instructions, which appear to implement these proposed extensions (shadow stack + indirect branch tracking): https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf https://software.intel.com/sites/default/files/managed/4d/2a...