[all-commits] [llvm/llvm-project] 54310f: [PowerPC] Add ROP Protection to prologue and epilogue

[stefanp-ibm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 54310fc176fde539b15f3cc95d4a3555df446ff6
      https://github.com/llvm/llvm-project/commit/54310fc176fde539b15f3cc95d4a3555df446ff6
  Author: Stefan Pintilie <stefanp at ca.ibm.com>
  Date:   2021-05-13 (Thu, 13 May 2021)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
    M llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
    M llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.h
    M llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp
    M llvm/lib/Target/PowerPC/PPCRegisterInfo.h
    A llvm/test/CodeGen/PowerPC/ppc64-rop-protection.ll

  Log Message:
  -----------
  [PowerPC] Add ROP Protection to prologue and epilogue

Added hashst to the prologue and hashchk to the epilogue.
The hash for the prologue and epilogue must always be stored as the first
element in the local variable space on the stack.

Reviewed By: nemanjai, #powerpc

Differential Revision: https://reviews.llvm.org/D99377