diff options
Diffstat (limited to 'tools/objtool')
-rw-r--r-- | tools/objtool/arch/x86/decode.c | 2 | ||||
-rw-r--r-- | tools/objtool/builtin-check.c | 15 | ||||
-rw-r--r-- | tools/objtool/elf.c | 12 | ||||
-rw-r--r-- | tools/objtool/elf.h | 1 |
4 files changed, 26 insertions, 4 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 5e0dea2cdc01..039636ffb6c8 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -150,9 +150,9 @@ int arch_decode_instruction(struct elf *elf, struct section *sec, *type = INSN_RETURN; break; - case 0xc5: /* iret */ case 0xca: /* retf */ case 0xcb: /* retf */ + case 0xcf: /* iret */ *type = INSN_CONTEXT_SWITCH; break; diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c index e8a1f699058a..b8dadb050d2b 100644 --- a/tools/objtool/builtin-check.c +++ b/tools/objtool/builtin-check.c @@ -757,11 +757,20 @@ 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 0d7983ac63ef..d897702ce742 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 aa1ff6596684..731973e1a3f5 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); |