[PATCH] D44802: Add the ShadowCallStack pass

[Vlad Tsyrklevich via Phabricator via llvm-commits]

vlad.tsyrklevich created this revision.
vlad.tsyrklevich added a reviewer: pcc.
Herald added subscribers: llvm-commits, mgorny.

The ShadowCallStack pass instruments functions marked with the
shadowcallstack attribute. The instrumented prolog saves the return
address to [gs:offset] where offset is stored and updated in [gs:0].
The instrumented epilog loads/updates the return address from [gs:0]
and checks that it matches the return address on the stack before
returning.


Repository:
  rL LLVM

https://reviews.llvm.org/D44802

Files:
  lib/Target/X86/CMakeLists.txt
  lib/Target/X86/ShadowCallStack.cpp
  lib/Target/X86/X86.h
  lib/Target/X86/X86TargetMachine.cpp
  test/CodeGen/X86/O0-pipeline.ll
  test/CodeGen/X86/shadow-call-stack.mir

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