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LoongArch: Support PC-relative relocations in modules

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Binutils >= 2.40 uses R_LARCH_B26 instead of R_LARCH_SOP_PUSH_PLT_PCREL,
and R_LARCH_PCALA* instead of R_LARCH_SOP_PUSH_PCREL.

Handle R_LARCH_B26 and R_LARCH_PCALA* in the module loader. For R_LARCH_
B26, also create a PLT entry as needed.

Tested-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Xi Ruoyao
2022-10-12 16:36:14 +08:00
committed by Huacai Chen
parent 0a75e5d1a1
commit 9bd1e38032
2 changed files with 75 additions and 1 deletions
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7
arch/loongarch/kernel/module-sections.c
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@@ -56,9 +56,14 @@ static void count_max_entries(Elf_Rela *relas, int num, unsigned int *plts)
for (i = 0; i < num; i++) {
type = ELF_R_TYPE(relas[i].r_info);
if (type == R_LARCH_SOP_PUSH_PLT_PCREL) {
switch (type) {
case R_LARCH_SOP_PUSH_PLT_PCREL:
case R_LARCH_B26:
if (!duplicate_rela(relas, i))
(*plts)++;
break;
default:
break; /* Do nothing. */
}
}
}