[RFC/RFT,V2 0/3] Add compiler support for Kernel Control Flow Integrity

[Dan Li <ashimida.1990@gmail.com>]

This series of patches is mainly used to support the control flow
integrity protection of the linux kernel [1], which is similar to
-fsanitize=kcfi in clang 16.0 [2,3].

Any suggestion please let me know :).

Thanks, Dan.

[1] https://lore.kernel.org/all/20220908215504.3686827-1-samitolvanen@google.com/
[2] https://clang.llvm.org/docs/ControlFlowIntegrity.html
[3] https://reviews.llvm.org/D119296

Signed-off-by: Dan Li <ashimida.1990@gmail.com>

---
Dan Li (3):
  [PR102768] flag-types.h (enum sanitize_code): Extend sanitize_code to
    64 bits to support more features
  [PR102768] Support CFI: Add basic support for Kernel Control Flow
    Integrity
  [PR102768] aarch64: Add support for Kernel Control Flow Integrity

 gcc/asan.h                    |   4 +-
 gcc/c-family/c-attribs.cc     |  10 +-
 gcc/c-family/c-common.h       |   2 +-
 gcc/c/c-parser.cc             |   4 +-
 gcc/cfgexpand.cc              |  26 ++++++
 gcc/cgraphunit.cc             |  34 +++++++
 gcc/combine.cc                |   1 +
 gcc/common.opt                |   4 +-
 gcc/config/aarch64/aarch64.cc | 166 ++++++++++++++++++++++++++++++++++
 gcc/cp/typeck.cc              |   2 +-
 gcc/doc/invoke.texi           |  36 ++++++++
 gcc/doc/tm.texi               |  27 ++++++
 gcc/doc/tm.texi.in            |   8 ++
 gcc/dwarf2asm.cc              |   2 +-
 gcc/emit-rtl.cc               |   1 +
 gcc/emit-rtl.h                |   4 +
 gcc/final.cc                  |  24 ++++-
 gcc/flag-types.h              |  67 +++++++-------
 gcc/gimple.cc                 |  11 +++
 gcc/gimple.h                  |   5 +-
 gcc/opt-suggestions.cc        |   2 +-
 gcc/opts.cc                   |  26 +++---
 gcc/opts.h                    |   8 +-
 gcc/output.h                  |   3 +
 gcc/reg-notes.def             |   1 +
 gcc/target.def                |  38 ++++++++
 gcc/toplev.cc                 |   4 +
 gcc/tree-cfg.cc               |   2 +-
 gcc/tree.cc                   | 144 +++++++++++++++++++++++++++++
 gcc/tree.h                    |   1 +
 gcc/varasm.cc                 |  26 ++++++
 31 files changed, 627 insertions(+), 66 deletions(-)

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2.17.1