[all-commits] [llvm/llvm-project] 38d720: [AArch64][PAC] Support BLRA* instructions in SLS H...

[Anatoly Trosinenko via All-commits]

  Branch: refs/heads/users/atrosinenko/pauth-sls-hardening
  Home:   https://github.com/llvm/llvm-project
  Commit: 38d720bb8a24167c1756e2171637fa75feaf02e5
      https://github.com/llvm/llvm-project/commit/38d720bb8a24167c1756e2171637fa75feaf02e5
  Author: Anatoly Trosinenko <atrosinenko at accesssoftek.com>
  Date:   2024-07-05 (Fri, 05 Jul 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64SLSHardening.cpp
    A llvm/test/CodeGen/AArch64/speculation-hardening-sls-blra.mir

  Log Message:
  -----------
  [AArch64][PAC] Support BLRA* instructions in SLS Hardening pass

Make SLS Hardening pass handle BLRA* instructions the same way it
handles BLR. The thunk names have the form

    __llvm_slsblr_thunk_xN            for BLR thunks
    __llvm_slsblr_thunk_(aaz|abz)_xN  for BLRAAZ and BLRABZ thunks
    __llvm_slsblr_thunk_(aa|ab)_xN_xM for BLRAA and BLRAB thunks

Now there are about 1800 possible thunk names, so do not rely on linear
thunk function's name lookup and parse the name instead.



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