[PATCH] D81930: [AArch64] Add -mbti flag.

[Daniel Kiss via Phabricator via cfe-commits]

danielkiss created this revision.
danielkiss added reviewers: nsz, tamas.petz, pbarrio, ostannard, chill.
Herald added subscribers: llvm-commits, cfe-commits, hiraditya, kristof.beyls.
Herald added projects: clang, LLVM.

Writing the .note.gnu.property manually is error prone and hard to
maintain in the assembly files.
The -mbti 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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D81930

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Arch/AArch64.cpp
  clang/test/Driver/arm64-markbti.S
  llvm/lib/Target/AArch64/AArch64.td
  llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
  llvm/lib/Target/AArch64/AArch64Subtarget.h
  llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64TargetStreamer.cpp
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64TargetStreamer.h

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