linux-kernel - Re: [PATCH v7 0/7] Add jump table support for objtool on LoongArch

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Message-ID: <CAAhV-H4UJe0_VexB894PrRz8wKT9V_i=-_ODQEHCOBv7ngs1xQ@mail.gmail.com>
Date: Sat, 8 Mar 2025 13:47:18 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>, Peter Zijlstra <peterz@...radead.org>, loongarch@...ts.linux.dev, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 0/7] Add jump table support for objtool on LoongArch

Hi, Josh and Peter,

Since "unreachable: Unify", "x86: Convert unreachable() to BUG()" and
other relevant patches have been backported to 6.12/6.13, I think the
7th of this series should also be backported to avoid build warnings.

Since tip.git hasn't applied this series, I will apply the 7th patch
as part of loongarch-fixes now.

Huacai

On Tue, Feb 11, 2025 at 7:50 PM Tiezhu Yang <yangtiezhu@...ngson.cn> wrote:
>
> This version is based on tip/tip.git master branch [1], the patch
> "objtool: Handle unreachable entry of rodata" is dropped, tested
> with the latest mainline Binutils, GCC and Clang (2025-02-11).
>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/log/?h=master
>
> Tiezhu Yang (7):
>   objtool: Handle various symbol types of rodata
>   objtool: Handle different entry size of rodata
>   objtool: Handle PC relative relocation type
>   objtool/LoongArch: Add support for switch table
>   objtool/LoongArch: Add support for goto table
>   LoongArch: Enable jump table for objtool
>   LoongArch: Convert unreachable() to BUG()
>
>  arch/loongarch/Kconfig                        |   3 +
>  arch/loongarch/Makefile                       |   6 +-
>  arch/loongarch/kernel/machine_kexec.c         |   4 +-
>  tools/objtool/arch/loongarch/decode.c         |  28 ++-
>  .../objtool/arch/loongarch/include/arch/elf.h |   7 +
>  tools/objtool/arch/loongarch/special.c        | 159 +++++++++++++++++-
>  tools/objtool/arch/powerpc/decode.c           |  15 ++
>  tools/objtool/arch/x86/decode.c               |  13 ++
>  tools/objtool/check.c                         |  23 ++-
>  tools/objtool/include/objtool/arch.h          |   3 +
>  10 files changed, 247 insertions(+), 14 deletions(-)
>
> --
> 2.42.0
>