[all-commits] [llvm/llvm-project] 95e43f: [AArch64] Add -mmark-bti-property flag.

[Dani via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 95e43f84b7b9c61011aece7583c0367297dd67d8
      https://github.com/llvm/llvm-project/commit/95e43f84b7b9c61011aece7583c0367297dd67d8
  Author: Daniel Kiss <daniel.kiss at arm.com>
  Date:   2020-09-17 (Thu, 17 Sep 2020)

  Changed paths:
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/ToolChains/Clang.cpp
    A clang/test/Driver/arm64-markbti.S
    M llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
    M llvm/lib/Target/AArch64/MCTargetDesc/AArch64TargetStreamer.cpp
    M llvm/lib/Target/AArch64/MCTargetDesc/AArch64TargetStreamer.h

  Log Message:
  -----------
  [AArch64] Add -mmark-bti-property flag.

Writing the .note.gnu.property manually is error prone and hard to
maintain in the assembly files.
The -mmark-bti-property is for the assembler to emit the section with the
GNU_PROPERTY_AARCH64_FEATURE_1_BTI. To be used when C/C++ is compiled
with -mbranch-protection=bti.

This patch refactors the .note.gnu.property handling.

Reviewed By: chill, nickdesaulniers

Differential Revision: https://reviews.llvm.org/D81930