[PATCH] D47311: [X86][CET] Shadow stack fix for setjmp/longjmp

[Mikhail Dvoretckii via Phabricator via llvm-commits]

mike.dvoretsky created this revision.
mike.dvoretsky added a reviewer: craig.topper.
Herald added subscribers: llvm-commits, hiraditya.

This is the new version of https://reviews.llvm.org/D46181, allowing setjmp/longjmp to work correctly with the Intel CET shadow stack by storing SSP on setjmp and fixing it on longjmp. The patch has been updated to use the cf-protection-return module flag instead of HasSHSTK, and the bug that caused https://reviews.llvm.org/D46181 to be reverted has been fixed with the test expanded to track that fix.


Repository:
  rL LLVM

https://reviews.llvm.org/D47311

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.h
  llvm/test/CodeGen/X86/shadow-stack.ll

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