[all-commits] [llvm/llvm-project] c113b5: [AArch64] Add clang command line support for -mhar...

[Kristof Beyls via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c113b59ef52593818bcd207521fd490ba3deeaea
      https://github.com/llvm/llvm-project/commit/c113b59ef52593818bcd207521fd490ba3deeaea
  Author: Kristof Beyls <kristof.beyls at arm.com>
  Date:   2020-06-19 (Fri, 19 Jun 2020)

  Changed paths:
    M clang/include/clang/Basic/DiagnosticDriverKinds.td
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/ToolChains/Arch/AArch64.cpp
    A clang/test/Driver/aarch64-sls-hardening-options.c

  Log Message:
  -----------
  [AArch64] Add clang command line support for -mharden-sls=

The accepted options to -mharden-sls= are:
* all: enable all mitigations against Straight Line Speculation that are
  implemented.
* none: disable all mitigations against Straight Line Speculation.
* retbr: enable the mitigation against Straight Line Speculation for RET
  and BR instructions.
* blr: enable the mitigation against Straight Line Speculation for BLR
  instructions.

Differential Revision: https://reviews.llvm.org/D81404