Fix "unsupported relocation type" errors caused by adding ORC support,
which generates unsupported relocation types.
The reason is because the generated '.rela.orc_unwind_ip' section will
contain the R_LARCH_32_PCCREL type.
Relocation section '.rela.orc_unwind_ip' at offset 0x1fb58 contains 600 entries:
Offset Info Type Sym. Value Sym. Name + Addend
000000000000 000300000063 R_LARCH_32_PCREL 0000000000000000 .text + 0
000000000004 000300000063 R_LARCH_32_PCREL 0000000000000000 .text + 64
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
---
arch/loongarch/kernel/module.c | 10 ++++++++++
1 file changed, 10 insertions(+)
@@ -368,6 +368,15 @@ static int apply_r_larch_got_pc(struct module *mod,
return apply_r_larch_pcala(mod, location, got, rela_stack, rela_stack_top, type);
}
+static int apply_r_larch_32_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;
+
+ *(u32 *)location = offset;
+ return 0;
+}
+
/*
* reloc_handlers_rela() - Apply a particular relocation to a module
* @mod: the module to apply the reloc to
@@ -397,6 +406,7 @@ static reloc_rela_handler reloc_rela_handlers[] = {
[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_PCALA_HI20...R_LARCH_PCALA64_HI12] = apply_r_larch_pcala,
+ [R_LARCH_32_PCREL] = apply_r_larch_32_pcrel,
};
int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,