Backport of control flow integrity from clang ore something else.

[Magnus Granberg]

Hi
Is there any plans to port the control flow integrity from clang[1] or use 
something that don't need any hardware support as CET[2].
There is allready part of it in gcc to support the CET so would it be posseble 
to write a software version of it? The best would be to make something like 
RAP[3] but it is patent-pending or some thing like that.
/Magnus

[1] https://clang.llvm.org/docs/ControlFlowIntegrity.html
[2] https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf
[3] https://grsecurity.net/rap_faq.php