diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c index 4cfdbb5b696783cbeb097f04220c180e7e87e82a..066086dd59a8017e293993a50d2f432d47441cfe 100644 --- a/tools/objtool/builtin-check.c +++ b/tools/objtool/builtin-check.c @@ -805,11 +805,20 @@ static struct rela *find_switch_table(struct objtool_file *file, insn->jump_dest->offset > orig_insn->offset)) break; + /* look for a relocation which references .rodata */ text_rela = find_rela_by_dest_range(insn->sec, insn->offset, insn->len); - if (text_rela && text_rela->sym == file->rodata->sym) - return find_rela_by_dest(file->rodata, - text_rela->addend); + if (!text_rela || text_rela->sym != file->rodata->sym) + continue; + + /* + * Make sure the .rodata address isn't associated with a + * symbol. gcc jump tables are anonymous data. + */ + if (find_symbol_containing(file->rodata, text_rela->addend)) + continue; + + return find_rela_by_dest(file->rodata, text_rela->addend); } return NULL; diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 0d7983ac63ef9e300110d9a6ec6771a75378784e..d897702ce7427804da2c09387f674077f22accc5 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -85,6 +85,18 @@ struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset) return NULL; } +struct symbol *find_symbol_containing(struct section *sec, unsigned long offset) +{ + struct symbol *sym; + + list_for_each_entry(sym, &sec->symbol_list, list) + if (sym->type != STT_SECTION && + offset >= sym->offset && offset < sym->offset + sym->len) + return sym; + + return NULL; +} + struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, unsigned int len) { diff --git a/tools/objtool/elf.h b/tools/objtool/elf.h index aa1ff6596684f9304d0dd4bd3165f819b4dcdaf7..731973e1a3f5eb6bb1d6e67890c54c1440f237f3 100644 --- a/tools/objtool/elf.h +++ b/tools/objtool/elf.h @@ -79,6 +79,7 @@ struct elf { struct elf *elf_open(const char *name); struct section *find_section_by_name(struct elf *elf, const char *name); struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset); +struct symbol *find_symbol_containing(struct section *sec, unsigned long offset); struct rela *find_rela_by_dest(struct section *sec, unsigned long offset); struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, unsigned int len);