[all-commits] [llvm/llvm-project] 73df82: [MTE] Add NT_ANDROID_TYPE_MEMTAG

[Mitch Phillips via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 73df82572af394667ef38a7492634de84ced2aaf
      https://github.com/llvm/llvm-project/commit/73df82572af394667ef38a7492634de84ced2aaf
  Author: Mitch Phillips <31459023+hctim at users.noreply.github.com>
  Date:   2022-03-07 (Mon, 07 Mar 2022)

  Changed paths:
    M llvm/include/llvm/BinaryFormat/ELF.h
    M llvm/lib/ObjectYAML/ELFYAML.cpp
    A llvm/test/tools/llvm-readobj/ELF/AArch64/note-android-memtag.test
    A llvm/test/tools/llvm-readobj/ELF/AArch64/note-android-unknown.test
    M llvm/tools/llvm-readobj/ELFDumper.cpp

  Log Message:
  -----------
  [MTE] Add NT_ANDROID_TYPE_MEMTAG

This ELF note is aarch64 and Android-specific. It specifies to the
dynamic loader that specific work should be scheduled to enable MTE
protection of stack and heap regions.

Current synthesis of the ".note.android.memtag" ELF note is done in the
Android build system. We'd like to move that to the compiler, and this
is the first step.

Reviewed By: MaskRay, jhenderson

Differential Revision: https://reviews.llvm.org/D119381