Convert the callback-based iterate_sym_by_demangled_name() with a new for_each_sym_by_demangled_name() macro. This eliminates the callback struct/function and makes the code more compact and readable.
Signed-off-by: Josh Poimboeuf <[email protected]> --- tools/objtool/elf.c | 68 ++++++++--------------------- tools/objtool/include/objtool/elf.h | 32 ++++++++++++-- tools/objtool/klp-diff.c | 42 ++++++------------ 3 files changed, 60 insertions(+), 82 deletions(-) diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index f3df2bde119f..dc39132f71c1 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -27,27 +27,16 @@ static ssize_t demangled_name_len(const char *name); -static inline u32 str_hash(const char *str) -{ - return jhash(str, strlen(str), 0); -} - -static inline u32 str_hash_demangled(const char *str) +u32 str_hash_demangled(const char *str) { return jhash(str, demangled_name_len(str), 0); } -#define __elf_table(name) (elf->name##_hash) -#define __elf_bits(name) (elf->name##_bits) - -#define __elf_table_entry(name, key) \ - __elf_table(name)[hash_min(key, __elf_bits(name))] - #define elf_hash_add(name, node, key) \ ({ \ struct elf_hash_node *__node = node; \ - __node->next = __elf_table_entry(name, key); \ - __elf_table_entry(name, key) = __node; \ + __node->next = __elf_table_entry(elf, name, key); \ + __elf_table_entry(elf, name, key) = __node; \ }) static inline void __elf_hash_del(struct elf_hash_node *node, @@ -69,30 +58,20 @@ static inline void __elf_hash_del(struct elf_hash_node *node, } #define elf_hash_del(name, node, key) \ - __elf_hash_del(node, &__elf_table_entry(name, key)) - -#define elf_list_entry(ptr, type, member) \ -({ \ - typeof(ptr) __ptr = (ptr); \ - __ptr ? container_of(__ptr, type, member) : NULL; \ -}) - -#define elf_hash_for_each_possible(name, obj, member, key) \ - for (obj = elf_list_entry(__elf_table_entry(name, key), typeof(*obj), member); \ - obj; \ - obj = elf_list_entry(obj->member.next, typeof(*(obj)), member)) + __elf_hash_del(node, &__elf_table_entry(elf, name, key)) #define elf_alloc_hash(name, size) \ ({ \ - __elf_bits(name) = max(10, ilog2(size)); \ - __elf_table(name) = mmap(NULL, sizeof(struct elf_hash_node *) << __elf_bits(name), \ + __elf_bits(elf, name) = max(10, ilog2(size)); \ + __elf_table(elf, name) = mmap(NULL, \ + sizeof(struct elf_hash_node *) << __elf_bits(elf, name), \ PROT_READ|PROT_WRITE, \ MAP_PRIVATE|MAP_ANON, -1, 0); \ - if (__elf_table(name) == (void *)-1L) { \ + if (__elf_table(elf, name) == (void *)-1L) { \ ERROR_GLIBC("mmap fail " #name); \ - __elf_table(name) = NULL; \ + __elf_table(elf, name) = NULL; \ } \ - __elf_table(name); \ + __elf_table(elf, name); \ }) static inline unsigned long __sym_start(struct symbol *s) @@ -141,7 +120,7 @@ struct section *find_section_by_name(const struct elf *elf, const char *name) { struct section *sec; - elf_hash_for_each_possible(section_name, sec, name_hash, str_hash(name)) { + elf_hash_for_each_possible(elf, section_name, sec, name_hash, str_hash(name)) { if (!strcmp(sec->name, name)) return sec; } @@ -154,7 +133,7 @@ static struct section *find_section_by_index(struct elf *elf, { struct section *sec; - elf_hash_for_each_possible(section, sec, hash, idx) { + elf_hash_for_each_possible(elf, section, sec, hash, idx) { if (sec->idx == idx) return sec; } @@ -166,7 +145,7 @@ static struct symbol *find_symbol_by_index(struct elf *elf, unsigned int idx) { struct symbol *sym; - elf_hash_for_each_possible(symbol, sym, hash, idx) { + elf_hash_for_each_possible(elf, symbol, sym, hash, idx) { if (sym->idx == idx) return sym; } @@ -285,7 +264,7 @@ struct symbol *find_symbol_by_name(const struct elf *elf, const char *name) { struct symbol *sym; - elf_hash_for_each_possible(symbol_name, sym, name_hash, str_hash(name)) { + elf_hash_for_each_possible(elf, symbol_name, sym, name_hash, str_hash(name)) { if (!strcmp(sym->name, name)) return sym; } @@ -300,7 +279,7 @@ static struct symbol *find_local_symbol_by_file_and_name(const struct elf *elf, { struct symbol *sym; - elf_hash_for_each_possible(symbol_name, sym, name_hash, str_hash_demangled(name)) { + elf_hash_for_each_possible(elf, symbol_name, sym, name_hash, str_hash_demangled(name)) { if (sym->bind == STB_LOCAL && sym->file == file && !strcmp(sym->name, name)) { return sym; @@ -314,7 +293,7 @@ struct symbol *find_global_symbol_by_name(const struct elf *elf, const char *nam { struct symbol *sym; - elf_hash_for_each_possible(symbol_name, sym, name_hash, str_hash_demangled(name)) { + elf_hash_for_each_possible(elf, symbol_name, sym, name_hash, str_hash_demangled(name)) { if (!strcmp(sym->name, name) && !is_local_sym(sym)) return sym; } @@ -322,19 +301,6 @@ struct symbol *find_global_symbol_by_name(const struct elf *elf, const char *nam return NULL; } -void iterate_global_symbol_by_demangled_name(const struct elf *elf, - const char *demangled_name, - void (*process)(struct symbol *sym, void *data), - void *data) -{ - struct symbol *sym; - - elf_hash_for_each_possible(symbol_name, sym, name_hash, str_hash(demangled_name)) { - if (!strcmp(sym->demangled_name, demangled_name) && !is_local_sym(sym)) - process(sym, data); - } -} - struct reloc *find_reloc_by_dest_range(const struct elf *elf, struct section *sec, unsigned long offset, unsigned int len) { @@ -347,7 +313,7 @@ struct reloc *find_reloc_by_dest_range(const struct elf *elf, struct section *se return NULL; for_offset_range(o, offset, offset + len) { - elf_hash_for_each_possible(reloc, reloc, hash, + elf_hash_for_each_possible(elf, reloc, reloc, hash, sec_offset_hash(rsec, o)) { if (reloc->sec != rsec) continue; diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h index 25573e5af76e..b142984eb9b5 100644 --- a/tools/objtool/include/objtool/elf.h +++ b/tools/objtool/include/objtool/elf.h @@ -21,6 +21,13 @@ #define SEC_NAME_LEN 1024 #define SYM_NAME_LEN 512 +static inline u32 str_hash(const char *str) +{ + return jhash(str, strlen(str), 0); +} + +u32 str_hash_demangled(const char *str); + #define bswap_if_needed(elf, val) __bswap_if_needed(&elf->ehdr, val) #ifdef LIBELF_USE_DEPRECATED @@ -130,6 +137,23 @@ struct elf { struct symbol *symbol_data; }; +#define __elf_table(elf, name) ((elf)->name##_hash) +#define __elf_bits(elf, name) ((elf)->name##_bits) + +#define __elf_table_entry(elf, name, key) \ + __elf_table(elf, name)[hash_min(key, __elf_bits(elf, name))] + +#define elf_list_entry(ptr, type, member) \ +({ \ + typeof(ptr) __ptr = (ptr); \ + __ptr ? container_of(__ptr, type, member) : NULL; \ +}) + +#define elf_hash_for_each_possible(elf, name, obj, member, key) \ + for (obj = elf_list_entry(__elf_table_entry(elf, name, key), typeof(*obj), member); \ + obj; \ + obj = elf_list_entry(obj->member.next, typeof(*(obj)), member)) + struct elf *elf_open_read(const char *name, int flags); struct elf *elf_create_file(GElf_Ehdr *ehdr, const char *name); @@ -186,9 +210,6 @@ struct symbol *find_func_by_offset(struct section *sec, unsigned long offset); struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset); struct symbol *find_symbol_by_name(const struct elf *elf, const char *name); struct symbol *find_global_symbol_by_name(const struct elf *elf, const char *name); -void iterate_global_symbol_by_demangled_name(const struct elf *elf, const char *demangled_name, - void (*process)(struct symbol *sym, void *data), - void *data); struct symbol *find_symbol_containing(const struct section *sec, unsigned long offset); int find_symbol_hole_containing(const struct section *sec, unsigned long offset); struct reloc *find_reloc_by_dest(const struct elf *elf, struct section *sec, unsigned long offset); @@ -468,6 +489,11 @@ static inline void set_sym_next_reloc(struct reloc *reloc, struct reloc *next) #define for_each_sym_continue(elf, sym) \ list_for_each_entry_continue(sym, &elf->symbols, global_list) +#define for_each_sym_by_demangled_name(elf, name, sym) \ + elf_hash_for_each_possible(elf, symbol_name, sym, name_hash, \ + str_hash(name)) \ + if (strcmp(sym->demangled_name, name)) {} else + #define rsec_next_reloc(rsec, reloc) \ reloc_idx(reloc) < sec_num_entries(rsec) - 1 ? reloc + 1 : NULL diff --git a/tools/objtool/klp-diff.c b/tools/objtool/klp-diff.c index 0653bf6a33bd..30ce234e01a1 100644 --- a/tools/objtool/klp-diff.c +++ b/tools/objtool/klp-diff.c @@ -46,11 +46,6 @@ static const struct option klp_diff_options[] = { static DEFINE_HASHTABLE(exports, 15); -static inline u32 str_hash(const char *str) -{ - return jhash(str, strlen(str), 0); -} - static char *escape_str(const char *orig) { size_t len = 0; @@ -396,22 +391,6 @@ static bool dont_correlate(struct symbol *sym) is_special_section_aux(sym->sec); } -struct process_demangled_name_data { - struct symbol *ret; - int count; -}; - -static void process_demangled_name(struct symbol *sym, void *d) -{ - struct process_demangled_name_data *data = d; - - if (sym->twin) - return; - - data->count++; - data->ret = sym; -} - /* * When there is no full name match, try match demangled_name. This would * match original foo.llvm.123 to patched foo.llvm.456. @@ -423,16 +402,23 @@ static void process_demangled_name(struct symbol *sym, void *d) static int find_global_symbol_by_demangled_name(struct elf *elf, struct symbol *sym, struct symbol **out_sym) { - struct process_demangled_name_data data = {}; + struct symbol *sym2, *result = NULL; + int count = 0; - iterate_global_symbol_by_demangled_name(elf, sym->demangled_name, - process_demangled_name, - &data); - if (data.count > 1) { - ERROR("Multiple (%d) correlation candidates for %s", data.count, sym->name); + for_each_sym_by_demangled_name(elf, sym->demangled_name, sym2) { + if (is_local_sym(sym2) || sym2->twin) + continue; + + count++; + result = sym2; + } + + if (count > 1) { + ERROR("Multiple (%d) correlation candidates for %s", count, sym->name); return -1; } - *out_sym = data.ret; + + *out_sym = result; return 0; } -- 2.53.0
