1 #ifndef __PERF_SYMBOL 2 #define __PERF_SYMBOL 1 3 4 #include <linux/types.h> 5 #include <stdbool.h> 6 #include <stdint.h> 7 #include "map.h" 8 #include "../perf.h" 9 #include <linux/list.h> 10 #include <linux/rbtree.h> 11 #include <stdio.h> 12 #include <byteswap.h> 13 #include <libgen.h> 14 #include "build-id.h" 15 #include "event.h" 16 #include "util.h" 17 18 #ifdef HAVE_LIBELF_SUPPORT 19 #include <libelf.h> 20 #include <gelf.h> 21 #endif 22 #include <elf.h> 23 24 #include "dso.h" 25 26 /* 27 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP; 28 * for newer versions we can use mmap to reduce memory usage: 29 */ 30 #ifdef HAVE_LIBELF_MMAP_SUPPORT 31 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP 32 #else 33 # define PERF_ELF_C_READ_MMAP ELF_C_READ 34 #endif 35 36 #ifdef HAVE_LIBELF_SUPPORT 37 Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, 38 GElf_Shdr *shp, const char *name, size_t *idx); 39 #endif 40 41 #ifndef DMGL_PARAMS 42 #define DMGL_NO_OPTS 0 /* For readability... */ 43 #define DMGL_PARAMS (1 << 0) /* Include function args */ 44 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 45 #endif 46 47 #define DSO__NAME_KALLSYMS "[kernel.kallsyms]" 48 #define DSO__NAME_KCORE "[kernel.kcore]" 49 50 /** struct symbol - symtab entry 51 * 52 * @ignore - resolvable but tools ignore it (e.g. idle routines) 53 */ 54 struct symbol { 55 struct rb_node rb_node; 56 u64 start; 57 u64 end; 58 u16 namelen; 59 u8 binding; 60 u8 idle:1; 61 u8 ignore:1; 62 u8 arch_sym; 63 char name[0]; 64 }; 65 66 void symbol__delete(struct symbol *sym); 67 void symbols__delete(struct rb_root *symbols); 68 69 /* symbols__for_each_entry - iterate over symbols (rb_root) 70 * 71 * @symbols: the rb_root of symbols 72 * @pos: the 'struct symbol *' to use as a loop cursor 73 * @nd: the 'struct rb_node *' to use as a temporary storage 74 */ 75 #define symbols__for_each_entry(symbols, pos, nd) \ 76 for (nd = rb_first(symbols); \ 77 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \ 78 nd = rb_next(nd)) 79 80 static inline size_t symbol__size(const struct symbol *sym) 81 { 82 return sym->end - sym->start; 83 } 84 85 struct strlist; 86 struct intlist; 87 88 struct symbol_conf { 89 unsigned short priv_size; 90 unsigned short nr_events; 91 bool try_vmlinux_path, 92 init_annotation, 93 force, 94 ignore_vmlinux, 95 ignore_vmlinux_buildid, 96 show_kernel_path, 97 use_modules, 98 allow_aliases, 99 sort_by_name, 100 show_nr_samples, 101 show_total_period, 102 use_callchain, 103 cumulate_callchain, 104 show_branchflag_count, 105 exclude_other, 106 show_cpu_utilization, 107 initialized, 108 kptr_restrict, 109 annotate_asm_raw, 110 annotate_src, 111 event_group, 112 demangle, 113 demangle_kernel, 114 filter_relative, 115 show_hist_headers, 116 branch_callstack, 117 has_filter, 118 show_ref_callgraph, 119 hide_unresolved, 120 raw_trace, 121 report_hierarchy; 122 const char *vmlinux_name, 123 *kallsyms_name, 124 *source_prefix, 125 *field_sep; 126 const char *default_guest_vmlinux_name, 127 *default_guest_kallsyms, 128 *default_guest_modules; 129 const char *guestmount; 130 const char *dso_list_str, 131 *comm_list_str, 132 *pid_list_str, 133 *tid_list_str, 134 *sym_list_str, 135 *col_width_list_str, 136 *bt_stop_list_str; 137 struct strlist *dso_list, 138 *comm_list, 139 *sym_list, 140 *dso_from_list, 141 *dso_to_list, 142 *sym_from_list, 143 *sym_to_list, 144 *bt_stop_list; 145 struct intlist *pid_list, 146 *tid_list; 147 const char *symfs; 148 }; 149 150 extern struct symbol_conf symbol_conf; 151 152 struct symbol_name_rb_node { 153 struct rb_node rb_node; 154 struct symbol sym; 155 }; 156 157 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path) 158 { 159 return path__join(bf, size, symbol_conf.symfs, path); 160 } 161 162 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path) 163 164 extern int vmlinux_path__nr_entries; 165 extern char **vmlinux_path; 166 167 static inline void *symbol__priv(struct symbol *sym) 168 { 169 return ((void *)sym) - symbol_conf.priv_size; 170 } 171 172 struct ref_reloc_sym { 173 const char *name; 174 u64 addr; 175 u64 unrelocated_addr; 176 }; 177 178 struct map_symbol { 179 struct map *map; 180 struct symbol *sym; 181 }; 182 183 struct addr_map_symbol { 184 struct map *map; 185 struct symbol *sym; 186 u64 addr; 187 u64 al_addr; 188 }; 189 190 struct branch_info { 191 struct addr_map_symbol from; 192 struct addr_map_symbol to; 193 struct branch_flags flags; 194 char *srcline_from; 195 char *srcline_to; 196 }; 197 198 struct mem_info { 199 struct addr_map_symbol iaddr; 200 struct addr_map_symbol daddr; 201 union perf_mem_data_src data_src; 202 }; 203 204 struct addr_location { 205 struct machine *machine; 206 struct thread *thread; 207 struct map *map; 208 struct symbol *sym; 209 u64 addr; 210 char level; 211 u8 filtered; 212 u8 cpumode; 213 s32 cpu; 214 s32 socket; 215 }; 216 217 struct symsrc { 218 char *name; 219 int fd; 220 enum dso_binary_type type; 221 222 #ifdef HAVE_LIBELF_SUPPORT 223 Elf *elf; 224 GElf_Ehdr ehdr; 225 226 Elf_Scn *opdsec; 227 size_t opdidx; 228 GElf_Shdr opdshdr; 229 230 Elf_Scn *symtab; 231 GElf_Shdr symshdr; 232 233 Elf_Scn *dynsym; 234 size_t dynsym_idx; 235 GElf_Shdr dynshdr; 236 237 bool adjust_symbols; 238 bool is_64_bit; 239 #endif 240 }; 241 242 void symsrc__destroy(struct symsrc *ss); 243 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 244 enum dso_binary_type type); 245 bool symsrc__has_symtab(struct symsrc *ss); 246 bool symsrc__possibly_runtime(struct symsrc *ss); 247 248 int dso__load(struct dso *dso, struct map *map); 249 int dso__load_vmlinux(struct dso *dso, struct map *map, 250 const char *vmlinux, bool vmlinux_allocated); 251 int dso__load_vmlinux_path(struct dso *dso, struct map *map); 252 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 253 bool no_kcore); 254 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map); 255 256 void dso__insert_symbol(struct dso *dso, enum map_type type, 257 struct symbol *sym); 258 259 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 260 u64 addr); 261 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 262 const char *name); 263 struct symbol *symbol__next_by_name(struct symbol *sym); 264 265 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 266 struct symbol *dso__last_symbol(struct dso *dso, enum map_type type); 267 struct symbol *dso__next_symbol(struct symbol *sym); 268 269 enum dso_type dso__type_fd(int fd); 270 271 int filename__read_build_id(const char *filename, void *bf, size_t size); 272 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 273 int modules__parse(const char *filename, void *arg, 274 int (*process_module)(void *arg, const char *name, 275 u64 start)); 276 int filename__read_debuglink(const char *filename, char *debuglink, 277 size_t size); 278 279 struct perf_env; 280 int symbol__init(struct perf_env *env); 281 void symbol__exit(void); 282 void symbol__elf_init(void); 283 int symbol__annotation_init(void); 284 285 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 286 size_t __symbol__fprintf_symname_offs(const struct symbol *sym, 287 const struct addr_location *al, 288 bool unknown_as_addr, 289 bool print_offsets, FILE *fp); 290 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 291 const struct addr_location *al, FILE *fp); 292 size_t __symbol__fprintf_symname(const struct symbol *sym, 293 const struct addr_location *al, 294 bool unknown_as_addr, FILE *fp); 295 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 296 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 297 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 298 bool symbol__restricted_filename(const char *filename, 299 const char *restricted_filename); 300 int symbol__config_symfs(const struct option *opt __maybe_unused, 301 const char *dir, int unset __maybe_unused); 302 303 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 304 struct symsrc *runtime_ss, int kmodule); 305 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 306 struct map *map); 307 308 void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel); 309 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 310 void symbols__fixup_duplicate(struct rb_root *symbols); 311 void symbols__fixup_end(struct rb_root *symbols); 312 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 313 314 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 315 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 316 bool *is_64_bit); 317 318 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 319 320 struct kcore_extract { 321 char *kcore_filename; 322 u64 addr; 323 u64 offs; 324 u64 len; 325 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 326 int fd; 327 }; 328 329 int kcore_extract__create(struct kcore_extract *kce); 330 void kcore_extract__delete(struct kcore_extract *kce); 331 332 int kcore_copy(const char *from_dir, const char *to_dir); 333 int compare_proc_modules(const char *from, const char *to); 334 335 int setup_list(struct strlist **list, const char *list_str, 336 const char *list_name); 337 int setup_intlist(struct intlist **list, const char *list_str, 338 const char *list_name); 339 340 #ifdef HAVE_LIBELF_SUPPORT 341 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr); 342 void arch__sym_update(struct symbol *s, GElf_Sym *sym); 343 #endif 344 345 #define SYMBOL_A 0 346 #define SYMBOL_B 1 347 348 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb); 349 350 /* structure containing an SDT note's info */ 351 struct sdt_note { 352 char *name; /* name of the note*/ 353 char *provider; /* provider name */ 354 bool bit32; /* whether the location is 32 bits? */ 355 union { /* location, base and semaphore addrs */ 356 Elf64_Addr a64[3]; 357 Elf32_Addr a32[3]; 358 } addr; 359 struct list_head note_list; /* SDT notes' list */ 360 }; 361 362 int get_sdt_note_list(struct list_head *head, const char *target); 363 int cleanup_sdt_note_list(struct list_head *sdt_notes); 364 int sdt_notes__get_count(struct list_head *start); 365 366 #define SDT_BASE_SCN ".stapsdt.base" 367 #define SDT_NOTE_SCN ".note.stapsdt" 368 #define SDT_NOTE_TYPE 3 369 #define SDT_NOTE_NAME "stapsdt" 370 #define NR_ADDR 3 371 372 #endif /* __PERF_SYMBOL */ 373