[GIT PULL] objtool changes for v6.14

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest objtool/core Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git objtool-core-2025-01-20

   # HEAD: 41a1e976623eb430f7b5a8619d3810b44e6235ad x86/mm: Convert unreachable() to BUG()

Objtool changes for v6.14:

 - Introduce the generic section-based annotation
   infrastructure a.k.a. ASM_ANNOTATE/ANNOTATE (Peter Zijlstra)

 - Convert various facilities to ASM_ANNOTATE/ANNOTATE: (Peter Zijlstra)

    - ANNOTATE_NOENDBR
    - ANNOTATE_RETPOLINE_SAFE
    - instrumentation_{begin,end}()
    - VALIDATE_UNRET_BEGIN
    - ANNOTATE_IGNORE_ALTERNATIVE
    - ANNOTATE_INTRA_FUNCTION_CALL
    - {.UN}REACHABLE

 - Optimize the annotation-sections parsing code (Peter Zijlstra)

 - Centralize annotation definitions in <linux/objtool.h>

 - Unify & simplify the barrier_before_unreachable()/unreachable()
   definitions (Peter Zijlstra)

 - Convert unreachable() calls to BUG() in x86 code, as
   unreachable() has unreliable code generation (Peter Zijlstra)

 - Remove annotate_reachable() and annotate_unreachable(), as it's
   unreliable against compiler optimizations (Peter Zijlstra)

 - Fix non-standard ANNOTATE_REACHABLE annotation order (Peter Zijlstra)

 - Robustify the annotation code by warning about unknown annotation
   types (Peter Zijlstra)

 - Allow arch code to discover jump table size, in preparation of
   annotated jump table support (Ard Biesheuvel)

 Thanks,

	Ingo

------------------>
Ard Biesheuvel (1):
      objtool: Allow arch code to discover jump table size

Peter Zijlstra (17):
      objtool: Generic annotation infrastructure
      objtool: Convert ANNOTATE_NOENDBR to ANNOTATE
      objtool: Convert ANNOTATE_RETPOLINE_SAFE to ANNOTATE
      objtool: Convert instrumentation_{begin,end}() to ANNOTATE
      objtool: Convert VALIDATE_UNRET_BEGIN to ANNOTATE
      objtool: Convert ANNOTATE_IGNORE_ALTERNATIVE to ANNOTATE
      objtool: Convert ANNOTATE_INTRA_FUNCTION_CALL to ANNOTATE
      objtool: Collapse annotate sequences
      objtool: Collect more annotations in objtool.h
      unreachable: Unify
      x86: Convert unreachable() to BUG()
      loongarch: Use ASM_REACHABLE
      objtool: Remove annotate_{,un}reachable()
      objtool: Convert {.UN}REACHABLE to ANNOTATE
      objtool: Fix ANNOTATE_REACHABLE to be a normal annotation
      objtool: Warn about unknown annotation types
      x86/mm: Convert unreachable() to BUG()


 arch/loongarch/include/asm/bug.h        |  13 +-
 arch/x86/entry/entry_64.S               |   9 +-
 arch/x86/include/asm/alternative.h      |  22 +-
 arch/x86/include/asm/bug.h              |   2 +-
 arch/x86/include/asm/irq_stack.h        |   4 +-
 arch/x86/include/asm/nospec-branch.h    |  18 --
 arch/x86/kernel/process.c               |   2 +-
 arch/x86/kernel/reboot.c                |   2 +-
 arch/x86/kvm/svm/sev.c                  |   2 +-
 arch/x86/mm/fault.c                     |   2 +-
 include/linux/compiler-gcc.h            |  12 -
 include/linux/compiler.h                |  37 +--
 include/linux/instrumentation.h         |  11 +-
 include/linux/objtool.h                 | 126 ++++++----
 include/linux/objtool_types.h           |  12 +
 tools/include/linux/objtool_types.h     |  12 +
 tools/objtool/arch/loongarch/special.c  |   3 +-
 tools/objtool/arch/powerpc/special.c    |   3 +-
 tools/objtool/arch/x86/special.c        |   4 +-
 tools/objtool/check.c                   | 426 +++++++++-----------------------
 tools/objtool/include/objtool/check.h   |   5 +-
 tools/objtool/include/objtool/special.h |   3 +-
 22 files changed, 267 insertions(+), 463 deletions(-)