Commit 9b3f8b66 authored by Chandler Carruth's avatar Chandler Carruth
Browse files

Add some minimal release notes for retpoline support. 

llvm-svn: 326539
parent 7c0247e3

llvm/docs/ReleaseNotes.rst

+10 −0
Original line number Diff line number Diff line
@@ -42,6 +42,12 @@ Non-comprehensive list of changes in this release 
* Preliminary support for Sanitizers and sibling features on X86(_64) NetBSD

  (ASan, UBsan, TSan, MSan, SafeStack, libFuzzer).



* Support for `retpolines <https://support.google.com/faqs/answer/7625886>`_

  was added to help mitigate "branch target injection" (variant #2) of the

  "Spectre" speculative side channels described by `Project Zero

  <https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html>`_

  and the `Spectre paper <https://spectreattack.com/spectre.pdf>`_.





Changes to the LLVM IR

----------------------
@@ -183,6 +189,10 @@ During this release the X86 target has: 


* Improved documentation for SSE/AVX intrinsics in intrin.h header files.



* Gained support for emitting `retpolines

  <https://support.google.com/faqs/answer/7625886>`_, including automatic

  insertion of the necessary thunks or using external thunks.





External Open Source Projects Using LLVM 6

==========================================