linux-kernel - [PATCH v2 0/2] Handle .data.rel.ro correctly and use it for BPF

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Message-ID: <20250219105542.2418786-4-ardb+git@google.com>
Date: Wed, 19 Feb 2025 11:55:43 +0100
From: Ard Biesheuvel <ardb+git@...gle.com>
To: linux-kernel@...r.kernel.org
Cc: x86@...nel.org, Huacai Chen <chenhuacai@...nel.org>, Ard Biesheuvel <ardb@...nel.org>, 
	Josh Poimboeuf <jpoimboe@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Tiezhu Yang <yangtiezhu@...ngson.cn>
Subject: [PATCH v2 0/2] Handle .data.rel.ro correctly and use it for BPF

From: Ard Biesheuvel <ardb@...nel.org>

LoongArch uses PIE codegen for the entire kernel, which has some
implications for how .rodata is populated and emitted into vmlinux.

Changes since v1: [0]

- Always use .data.rel.ro.c_jump_table for C jump tables
- Add Tiezhu Yang's Tested-by
- Split into two patches and rebase onto Linus's tree

[0] https://lore.kernel.org/all/20250218092538.1903204-2-ardb+git@google.com/T/#u

Cc: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Tiezhu Yang <yangtiezhu@...ngson.cn>

Ard Biesheuvel (2):
  asm-generic/vmlinux.lds: Move .data.rel.ro input into .rodata segment
  objtool: Use fPIE compatible ELF sections for C jump tables

 include/asm-generic/vmlinux.lds.h       | 2 +-
 include/linux/compiler.h                | 2 +-
 tools/objtool/check.c                   | 7 ++++---
 tools/objtool/include/objtool/special.h | 2 +-
 4 files changed, 7 insertions(+), 6 deletions(-)

-- 
2.48.1.601.g30ceb7b040-goog