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

Posted by DiabloD3 on Saturday January 24, 2015 @03:45PM
from the alex-ionescu.com dept.

( 3 comments | 42 points | on HN )

Re:How Control Flow Guard Caused Windows 8.1 Address Space a... by yuhong on Saturday January 24, 2015 @08:29PM (#8941739)

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.

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Re:How Control Flow Guard Caused Windows 8.1 Address Space a... by aionescu on Sunday January 25, 2015 @12:27AM (#8942140)

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

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Re:How Control Flow Guard Caused Windows 8.1 Address Space a... by kjs3 on Wednesday January 28, 2015 @05:28PM (#8962963)

Citation?

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