[all-commits] [llvm/llvm-project] 58f851: [PAC] Sign LR with B key for non-leaf functions wi...

[Daniil Kovalev via All-commits]

  Branch: refs/heads/release/19.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 58f851dfb66dcd0af89d0e2da483a358c3643114
      https://github.com/llvm/llvm-project/commit/58f851dfb66dcd0af89d0e2da483a358c3643114
  Author: Daniil Kovalev <dkovalev at accesssoftek.com>
  Date:   2024-07-26 (Fri, 26 Jul 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
    M llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.cpp
    M llvm/lib/Target/AArch64/AArch64PointerAuth.cpp
    M llvm/lib/Target/AArch64/AArch64Subtarget.cpp
    M llvm/lib/Target/AArch64/AArch64Subtarget.h
    A llvm/test/CodeGen/AArch64/ptrauth-ret-trap.ll
    A llvm/test/CodeGen/AArch64/ptrauth-ret.ll

  Log Message:
  -----------
  [PAC] Sign LR with B key for non-leaf functions with ptrauth-returns attr (#100552)

For pauthtest ABI, there is a bunch of ptrauth-* options, including
ptrauth-returns. Use "ptrauth-returns" function attribute to indicate
need for LR signing with B key for non-leaf function to avoid using
"sign-return-address" and "sign-return-address-key" which were
originally designed for pac-ret.

Co-authored-by: Ahmed Bougacha <ahmed at bougacha.org>
Co-authored-by: Anatoly Trosinenko <atrosinenko at accesssoftek.com>
(cherry picked from commit 56fd2472d887392855ad85c53df5782a2c3f8ddb)



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