linux-kernel - [PATCH 0/5] LoongArch: Support new relocation types

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Date:   Thu, 28 Jul 2022 00:24:40 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     loongarch@...ts.linux.dev
Cc:     linux-kernel@...r.kernel.org, WANG Xuerui <kernel@...0n.name>,
        Huacai Chen <chenhuacai@...nel.org>
Subject: [PATCH 0/5] LoongArch: Support new relocation types

The version 2.00 of LoongArch ELF ABI specification introduced new
relocation types, and the development tree of Binutils and GCC has
started to use them.  If the kernel is built with the latest snapshot of
Binutils or GCC, it will fail to load the modules because of unrecognized
relocation types in modules.

Add support for GOT and new relocation types for the module loader, so
the kernel (with modules) can be built with the "normal" code model and
function properly.

Tested by building the kernel with Binutils & GCC master branch, and
running the kernel with 35 in-tree modules loaded.

Link: https://github.com/loongson/LoongArch-Documentation/pull/57
Link: https://gcc.gnu.org/r13-1834
Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=f09482a

Xi Ruoyao (5):
  LoongArch: Add section of GOT for kernel module
  LoongArch: Support R_LARCH_SOP_PUSH_GPREL relocation type in kernel
    module
  LoongArch: Support relocation against _GLOBAL_OFFSET_TABLE_
  LoongArch: Stop using undocumented assembler options
  LoongArch: Support modules with new relocation types

 arch/loongarch/Makefile                 |  5 +-
 arch/loongarch/include/asm/elf.h        | 37 ++++++++++
 arch/loongarch/include/asm/module.h     | 23 ++++++
 arch/loongarch/include/asm/module.lds.h |  1 +
 arch/loongarch/kernel/head.S            | 10 +--
 arch/loongarch/kernel/module-sections.c | 72 +++++++++++++++++--
 arch/loongarch/kernel/module.c          | 94 +++++++++++++++++++++++++
 7 files changed, 229 insertions(+), 13 deletions(-)

-- 
2.37.0