[all-commits] [llvm/llvm-project] 801ab7: [ARM][AArch64] SLSHardening: make non-comdat thunk...

[Dani via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 801ab71032e157eb7bcd38efeb6486742a7c53bb
      https://github.com/llvm/llvm-project/commit/801ab71032e157eb7bcd38efeb6486742a7c53bb
  Author: Daniel Kiss <daniel.kiss at arm.com>
  Date:   2021-05-20 (Thu, 20 May 2021)

  Changed paths:
    M clang/lib/Driver/ToolChains/Arch/AArch64.cpp
    M clang/lib/Driver/ToolChains/Arch/ARM.cpp
    M clang/test/Driver/sls-hardening-options.c
    M llvm/include/llvm/CodeGen/IndirectThunks.h
    M llvm/lib/Target/AArch64/AArch64.td
    M llvm/lib/Target/AArch64/AArch64SLSHardening.cpp
    M llvm/lib/Target/AArch64/AArch64Subtarget.h
    M llvm/lib/Target/ARM/ARM.td
    M llvm/lib/Target/ARM/ARMSLSHardening.cpp
    M llvm/lib/Target/ARM/ARMSubtarget.h
    M llvm/test/CodeGen/AArch64/speculation-hardening-sls.ll
    M llvm/test/CodeGen/ARM/speculation-hardening-sls.ll

  Log Message:
  -----------
  [ARM][AArch64] SLSHardening: make non-comdat thunks possible

Linker scripts might not handle COMDAT sections. SLSHardeing adds
new section for each __llvm_slsblr_thunk_xN. This new option allows
the generation of the thunks into the normal text section to handle these
exceptional cases.
,comdat or ,noncomdat can be added to harden-sls to control the codegen.
-mharden-sls=[all|retbr|blr],nocomdat.

Reviewed By: kristof.beyls

Differential Revision: https://reviews.llvm.org/D100546