modpost: error out if addend_*_rel() is not implemented for REL arch

The section mismatch check relies on the relocation entries.

For REL, the addend value is implicit, so we need some code to compute
it. Currently, EM_386, EM_ARM, and EM_MIPS are supported. This commit
makes sure we covered all the cases.

I believe the other architectures use RELA, where the explicit r_addend
field exists.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index d4531d09984de2322a025b30f5def4c033f3cbe1..c1c523adb139b8dee95228a5667c9938eff8916d 100644 (file)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1628,6 +1628,8 @@ static void section_rel(const char *modname, struct elf_info *elf,
                        if (addend_mips_rel(elf, sechdr, &r))
                                continue;
                        break;
+               default:
+                       fatal("Please add code to calculate addend for this architecture\n");
                }
                sym = elf->symtab_start + r_sym;
                /* Skip special sections */