How Control Flow Guard Caused Windows 8.1 Address Space and Behavior Changes

[DiabloD3]

http://www.alex-ionescu.com/?p=246

[yuhong]

I think MS does mention CMPXCHG16B as part of the system requirements for Win8.1. This affected the older DDR1 K8 CPUs (before mid-2006) the most. I wonder if adding 16-byte atomic operation support required HyperTransport protocol changes.

[aionescu → yuhong]

Actually, AMD basically forgot to implement the instruction. It was in the manuals.

[kjs3 → aionescu]

Citation?