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Subject[PATCH v2 0/9] Make check implementation arch agnostic
Date
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 7-9 abstracts the use of unwind hints, so some definitions
can be shared across architectures while keeping arch specific
semantics

Changes since v1 [4]:
- Rebased on recent tip/objtool/core
- Split the unwind hint rework into multiple patches as suggested by
Miroslav

[1] https://lkml.org/lkml/2019/8/16/400
[2] https://lkml.org/lkml/2020/7/30/415
[3] https://github.com/julien-thierry/linux/tree/arch-independent-check
[4] https://lkml.org/lkml/2020/6/8/535

Cheers,

Julien

-->

Julien Thierry (8):
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
frame: Only include valid definitions depending on source file type
frame: Make unwind hints definitions available to other architectures
objtool: Abstract unwind hint reading

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

arch/x86/include/asm/orc_types.h | 13 --
arch/x86/include/asm/unwind_hints.h | 44 +----
include/linux/frame.h | 78 ++++++++
tools/arch/x86/include/asm/orc_types.h | 13 --
tools/include/linux/frame.h | 113 ++++++++++++
tools/objtool/Makefile | 2 +-
tools/objtool/arch.h | 5 +-
tools/objtool/arch/x86/Build | 1 +
tools/objtool/arch/x86/arch_special.c | 145 +++++++++++++++
tools/objtool/arch/x86/decode.c | 54 ++++++
tools/objtool/arch/x86/include/arch_special.h | 20 +++
tools/objtool/cfi.h | 3 +-
tools/objtool/check.c | 166 ++----------------
tools/objtool/check.h | 7 +-
tools/objtool/objtool.h | 2 +
tools/objtool/orc_gen.c | 4 +-
tools/objtool/special.c | 48 +----
tools/objtool/special.h | 10 ++
tools/objtool/sync-check.sh | 27 ++-
tools/objtool/weak.c | 2 -
20 files changed, 486 insertions(+), 271 deletions(-)
create mode 100644 tools/include/linux/frame.h
create mode 100644 tools/objtool/arch/x86/arch_special.c
create mode 100644 tools/objtool/arch/x86/include/arch_special.h

--
2.21.3

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