diff options
Diffstat (limited to 'util/cbfstool/rmodule.c')
| -rw-r--r-- | util/cbfstool/rmodule.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/util/cbfstool/rmodule.c b/util/cbfstool/rmodule.c index 4ac2951f72..ce005108ed 100644 --- a/util/cbfstool/rmodule.c +++ b/util/cbfstool/rmodule.c @@ -38,10 +38,16 @@ static int valid_reloc_amd64(Elf64_Rela *rel) type = ELF64_R_TYPE(rel->r_info); - /* Only these 6 relocations are expected to be found. */ + /* + * Relocation R_AMD64_32S is not allowed. It can only be safely used in protected mode, + * and when the address pointed to is below 2 GiB in long mode. + * Using it in assembly operations will break compilation with error: + * E: Invalid reloc type: 11 + */ + + /* Only these 5 relocations are expected to be found. */ return (type == R_AMD64_64 || type == R_AMD64_PC64 || - type == R_AMD64_32S || type == R_AMD64_32 || type == R_AMD64_PC32 || /* @@ -60,7 +66,6 @@ static int should_emit_amd64(Elf64_Rela *rel) /* Only emit absolute relocations */ return (type == R_AMD64_64 || - type == R_AMD64_32S || type == R_AMD64_32); } @@ -182,6 +187,10 @@ static int for_each_reloc(struct rmod_context *ctx, struct reloc_filter *f, if (!ctx->ops->valid_type(r)) { ERROR("Invalid reloc type: %u\n", (unsigned int)ELF64_R_TYPE(r->r_info)); + if ((ctx->ops->arch == EM_X86_64) && + (ELF64_R_TYPE(r->r_info) == R_AMD64_32S)) + ERROR("Illegal use of 32bit sign extended addressing at offset 0x%x\n", + (unsigned int)r->r_offset); return -1; } |