[PATCH v3 00/10] Make check implementation arch agnostic

[Julien Thierry <jthierry@redhat.com>]

Hi,

The current implementation of the check subcommand has various x86 bits
here and there. In order to prepare objtool to provide check for other
architectures, add some abstraction over the x86 specific bits, relying
on objtool arch specific code to provide some necessary operations.

This is part of the effort to implement check for arm64, initiated [1]
by Raphael. The series is based on top of the separation of check & orc
subcommands series[2].

I've push both series base on top of tip/objtool/core at [3].

- The first two patches make it simpler for new arches to provide their
list of kernel headers, without worrying about modifications in the x86
headers.
- Patch 3 Moves arch specific macros to more suitable location
- Patches 4 and 5 add abstraction to handle alternatives
- Patch 6 adds abstraction to handle jump table
- Patches 7-10 makes unwind hint definitions shared across architectures

Changes since v2 [4]:
- Rebased on v5.9-rc1
- Under tools/objtool/arch/x86/, rename arch_special.c to special.c
- Rename include/linux/frame.h to inclide/linux/objtool.h
- Share unwind hint types across architectures

[1] https://lkml.org/lkml/2019/8/16/400
[2] https://lkml.org/lkml/2020/6/4/675
[3] https://github.com/julien-thierry/linux/tree/arch-independent-check
[4] https://lkml.org/lkml/2020/7/30/424

Cheers,

Julien

-->

Julien Thierry (9):
  objtool: Group headers to check in a single list
  objtool: Make sync-check consider the target architecture
  objtool: Move macros describing structures to arch-dependent code
  objtool: Abstract alternative special case handling
  objtool: Make relocation in alternative handling arch dependent
  headers: Rename frame.h
  objtool: Only include valid definitions depending on source file type
  objtool: Make unwind hints definitions available to other
    architectures
  objtool: Decode unwind hint register depending on architecture

Raphael Gault (1):
  objtool: Refactor switch-tables code to support other architectures

 arch/x86/include/asm/nospec-branch.h          |   2 +-
 arch/x86/include/asm/orc_types.h              |  34 ----
 arch/x86/include/asm/unwind_hints.h           |  50 +-----
 arch/x86/kernel/kprobes/core.c                |   2 +-
 arch/x86/kernel/kprobes/opt.c                 |   2 +-
 arch/x86/kernel/reboot.c                      |   2 +-
 arch/x86/kernel/unwind_orc.c                  |  11 +-
 arch/x86/kvm/svm/svm.c                        |   2 +-
 arch/x86/kvm/vmx/nested.c                     |   2 +-
 arch/x86/kvm/vmx/vmx.c                        |   2 +-
 arch/x86/xen/enlighten_pv.c                   |   2 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_msg.c           |   3 +-
 include/linux/frame.h                         |  35 -----
 include/linux/objtool.h                       | 134 ++++++++++++++++
 kernel/bpf/core.c                             |   2 +-
 kernel/kexec_core.c                           |   2 +-
 tools/arch/x86/include/asm/orc_types.h        |  34 ----
 tools/include/linux/objtool.h                 | 134 ++++++++++++++++
 tools/objtool/Makefile                        |   2 +-
 tools/objtool/arch.h                          |   2 +
 tools/objtool/arch/x86/Build                  |   1 +
 tools/objtool/arch/x86/decode.c               |  37 +++++
 tools/objtool/arch/x86/include/arch_special.h |  20 +++
 tools/objtool/arch/x86/special.c              | 145 ++++++++++++++++++
 tools/objtool/check.c                         | 137 ++---------------
 tools/objtool/check.h                         |   7 +-
 tools/objtool/objtool.h                       |   2 +
 tools/objtool/orc_dump.c                      |   7 +-
 tools/objtool/orc_gen.c                       |   5 +-
 tools/objtool/special.c                       |  48 +-----
 tools/objtool/special.h                       |  10 ++
 tools/objtool/sync-check.sh                   |  27 ++--
 tools/objtool/weak.c                          |   2 -
 33 files changed, 561 insertions(+), 346 deletions(-)
 delete mode 100644 include/linux/frame.h
 create mode 100644 include/linux/objtool.h
 create mode 100644 tools/include/linux/objtool.h
 create mode 100644 tools/objtool/arch/x86/include/arch_special.h
 create mode 100644 tools/objtool/arch/x86/special.c

--
2.21.3