linux-kernel - [PATCH v2 0/5] Add jump table support for objtool on LoongArch

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Message-ID: <20241105123906.26072-1-yangtiezhu@loongson.cn>
Date: Tue,  5 Nov 2024 20:39:01 +0800
From: Tiezhu Yang <yangtiezhu@...ngson.cn>
To: Huacai Chen <chenhuacai@...nel.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Cc: loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/5] Add jump table support for objtool on LoongArch

This series is based on 6.12-rc6, tested with the upstream mainline
binutils, GCC and Clang, all the changes are under tools/objtool and
arch/loongarch.

It is time to remove the compiler option -fno-jump-tables to enable
jump table for objtool if the compiler is GCC and it has the compiler
option -mannotate-tablejump, the next work is to add the corresponding
support with Clang after addressing some corner issues due to different
compiler behaviors.

Tiezhu Yang (5):
  objtool: Handle various symbol types for rodata
  objtool: Handle special cases of discard.reachable
  objtool/LoongArch: Add support for switch table
  objtool/LoongArch: Add support for goto table
  LoongArch: Enable jump table with GCC for objtool

 arch/loongarch/Kconfig                 |  3 +
 arch/loongarch/Makefile                |  9 +++
 tools/objtool/arch/loongarch/special.c | 83 +++++++++++++++++++++++++-
 tools/objtool/check.c                  | 38 ++++++++++--
 4 files changed, 128 insertions(+), 5 deletions(-)

-- 
2.42.0