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LoongArch: Add support for 64_PCREL relocation type

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commit b1dc55a3d6 upstream.

When build and update kernel with the latest upstream binutils and
loongson3_defconfig, module loader fails with:

  kmod: zsmalloc: Unknown relocation type 109
  kmod: fuse: Unknown relocation type 109
  kmod: fuse: Unknown relocation type 109
  kmod: radeon: Unknown relocation type 109
  kmod: nf_tables: Unknown relocation type 109
  kmod: nf_tables: Unknown relocation type 109

This is because the latest upstream binutils replaces a pair of ADD64
and SUB64 with 64_PCREL, so add support for 64_PCREL relocation type.

Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ecb802d02eeb
Cc: <stable@vger.kernel.org>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tiezhu Yang 2023-09-27 16:19:13 +08:00 committed by Greg Kroah-Hartman
parent d5725efed5
commit 2447c5b947
1 changed files with 10 additions and 0 deletions
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10
arch/loongarch/kernel/module.c
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@ -376,6 +376,15 @@ static int apply_r_larch_32_pcrel(struct module *mod, u32 *location, Elf_Addr v,
return 0;
}
static int apply_r_larch_64_pcrel(struct module *mod, u32 *location, Elf_Addr v,
s64 *rela_stack, size_t *rela_stack_top, unsigned int type)
{
ptrdiff_t offset = (void *)v - (void *)location;
*(u64 *)location = offset;
return 0;
}
/*
* reloc_handlers_rela() - Apply a particular relocation to a module
* @mod: the module to apply the reloc to
@ -406,6 +415,7 @@ static reloc_rela_handler reloc_rela_handlers[] = {
[R_LARCH_ADD32 ... R_LARCH_SUB64] = apply_r_larch_add_sub,
[R_LARCH_PCALA_HI20...R_LARCH_PCALA64_HI12] = apply_r_larch_pcala,
[R_LARCH_32_PCREL] = apply_r_larch_32_pcrel,
[R_LARCH_64_PCREL] = apply_r_larch_64_pcrel,
};
int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,