Messages in this thread Patch in this message | | | Subject | [PATCH 2/5] LoongArch: Support R_LARCH_SOP_PUSH_GPREL relocation type in kernel module | From | Xi Ruoyao <> | Date | Thu, 28 Jul 2022 00:27:14 +0800 |
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This relocation type pushes the offset of the GOT entry for a symbol from the beginning of GOT into the relocation stack. Our linker script has initialized an empty GOT, so we need to create a new GOT entry if there is no exist one for a symbol.
Signed-off-by: Xi Ruoyao <xry111@xry111.site> --- arch/loongarch/kernel/module.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/arch/loongarch/kernel/module.c b/arch/loongarch/kernel/module.c index 638427ff0d51..e5f1fd022cd0 100644 --- a/arch/loongarch/kernel/module.c +++ b/arch/loongarch/kernel/module.c @@ -122,6 +122,16 @@ static int apply_r_larch_sop_push_plt_pcrel(struct module *mod, u32 *location, E return apply_r_larch_sop_push_pcrel(mod, location, v, rela_stack, rela_stack_top, type); } +static int apply_r_larch_sop_push_gprel(struct module *mod, u32 *location, + Elf_Addr v, s64 *rela_stack, size_t *rela_stack_top, + unsigned int type) +{ + Elf_Addr got = module_emit_got_entry(mod, v); + ptrdiff_t offset = (void *)got - (void *)mod->arch.got.shdr->sh_addr; + + return rela_stack_push(offset, rela_stack, rela_stack_top); +} + static int apply_r_larch_sop(struct module *mod, u32 *location, Elf_Addr v, s64 *rela_stack, size_t *rela_stack_top, unsigned int type) { @@ -310,6 +320,7 @@ static reloc_rela_handler reloc_rela_handlers[] = { [R_LARCH_SOP_SUB ... R_LARCH_SOP_IF_ELSE] = apply_r_larch_sop, [R_LARCH_SOP_POP_32_S_10_5 ... R_LARCH_SOP_POP_32_U] = apply_r_larch_sop_imm_field, [R_LARCH_ADD32 ... R_LARCH_SUB64] = apply_r_larch_add_sub, + [R_LARCH_SOP_PUSH_GPREL] = apply_r_larch_sop_push_gprel, }; int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, -- 2.37.0
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