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 arch_sym; 62 char name[0]; 63 }; 64 65 void symbol__delete(struct symbol *sym); 66 void symbols__delete(struct rb_root *symbols); 67 68 /* symbols__for_each_entry - iterate over symbols (rb_root) 69 * 70 * @symbols: the rb_root of symbols 71 * @pos: the 'struct symbol *' to use as a loop cursor 72 * @nd: the 'struct rb_node *' to use as a temporary storage 73 */ 74 #define symbols__for_each_entry(symbols, pos, nd) \ 75 for (nd = rb_first(symbols); \ 76 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \ 77 nd = rb_next(nd)) 78 79 static inline size_t symbol__size(const struct symbol *sym) 80 { 81 return sym->end - sym->start; 82 } 83 84 struct strlist; 85 struct intlist; 86 87 struct symbol_conf { 88 unsigned short priv_size; 89 unsigned short nr_events; 90 bool try_vmlinux_path, 91 init_annotation, 92 force, 93 ignore_vmlinux, 94 ignore_vmlinux_buildid, 95 show_kernel_path, 96 use_modules, 97 allow_aliases, 98 sort_by_name, 99 show_nr_samples, 100 show_total_period, 101 use_callchain, 102 cumulate_callchain, 103 exclude_other, 104 show_cpu_utilization, 105 initialized, 106 kptr_restrict, 107 annotate_asm_raw, 108 annotate_src, 109 event_group, 110 demangle, 111 demangle_kernel, 112 filter_relative, 113 show_hist_headers, 114 branch_callstack, 115 has_filter, 116 show_ref_callgraph, 117 hide_unresolved, 118 raw_trace, 119 report_hierarchy; 120 const char *vmlinux_name, 121 *kallsyms_name, 122 *source_prefix, 123 *field_sep; 124 const char *default_guest_vmlinux_name, 125 *default_guest_kallsyms, 126 *default_guest_modules; 127 const char *guestmount; 128 const char *dso_list_str, 129 *comm_list_str, 130 *pid_list_str, 131 *tid_list_str, 132 *sym_list_str, 133 *col_width_list_str; 134 struct strlist *dso_list, 135 *comm_list, 136 *sym_list, 137 *dso_from_list, 138 *dso_to_list, 139 *sym_from_list, 140 *sym_to_list; 141 struct intlist *pid_list, 142 *tid_list; 143 const char *symfs; 144 }; 145 146 extern struct symbol_conf symbol_conf; 147 148 struct symbol_name_rb_node { 149 struct rb_node rb_node; 150 struct symbol sym; 151 }; 152 153 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path) 154 { 155 return path__join(bf, size, symbol_conf.symfs, path); 156 } 157 158 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path) 159 160 extern int vmlinux_path__nr_entries; 161 extern char **vmlinux_path; 162 163 static inline void *symbol__priv(struct symbol *sym) 164 { 165 return ((void *)sym) - symbol_conf.priv_size; 166 } 167 168 struct ref_reloc_sym { 169 const char *name; 170 u64 addr; 171 u64 unrelocated_addr; 172 }; 173 174 struct map_symbol { 175 struct map *map; 176 struct symbol *sym; 177 }; 178 179 struct addr_map_symbol { 180 struct map *map; 181 struct symbol *sym; 182 u64 addr; 183 u64 al_addr; 184 }; 185 186 struct branch_info { 187 struct addr_map_symbol from; 188 struct addr_map_symbol to; 189 struct branch_flags flags; 190 char *srcline_from; 191 char *srcline_to; 192 }; 193 194 struct mem_info { 195 struct addr_map_symbol iaddr; 196 struct addr_map_symbol daddr; 197 union perf_mem_data_src data_src; 198 }; 199 200 struct addr_location { 201 struct machine *machine; 202 struct thread *thread; 203 struct map *map; 204 struct symbol *sym; 205 u64 addr; 206 char level; 207 u8 filtered; 208 u8 cpumode; 209 s32 cpu; 210 s32 socket; 211 }; 212 213 struct symsrc { 214 char *name; 215 int fd; 216 enum dso_binary_type type; 217 218 #ifdef HAVE_LIBELF_SUPPORT 219 Elf *elf; 220 GElf_Ehdr ehdr; 221 222 Elf_Scn *opdsec; 223 size_t opdidx; 224 GElf_Shdr opdshdr; 225 226 Elf_Scn *symtab; 227 GElf_Shdr symshdr; 228 229 Elf_Scn *dynsym; 230 size_t dynsym_idx; 231 GElf_Shdr dynshdr; 232 233 bool adjust_symbols; 234 bool is_64_bit; 235 #endif 236 }; 237 238 void symsrc__destroy(struct symsrc *ss); 239 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 240 enum dso_binary_type type); 241 bool symsrc__has_symtab(struct symsrc *ss); 242 bool symsrc__possibly_runtime(struct symsrc *ss); 243 244 int dso__load(struct dso *dso, struct map *map); 245 int dso__load_vmlinux(struct dso *dso, struct map *map, 246 const char *vmlinux, bool vmlinux_allocated); 247 int dso__load_vmlinux_path(struct dso *dso, struct map *map); 248 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 249 bool no_kcore); 250 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map); 251 252 void dso__insert_symbol(struct dso *dso, enum map_type type, 253 struct symbol *sym); 254 255 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 256 u64 addr); 257 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 258 const char *name); 259 struct symbol *symbol__next_by_name(struct symbol *sym); 260 261 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 262 struct symbol *dso__last_symbol(struct dso *dso, enum map_type type); 263 struct symbol *dso__next_symbol(struct symbol *sym); 264 265 enum dso_type dso__type_fd(int fd); 266 267 int filename__read_build_id(const char *filename, void *bf, size_t size); 268 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 269 int modules__parse(const char *filename, void *arg, 270 int (*process_module)(void *arg, const char *name, 271 u64 start)); 272 int filename__read_debuglink(const char *filename, char *debuglink, 273 size_t size); 274 275 struct perf_env; 276 int symbol__init(struct perf_env *env); 277 void symbol__exit(void); 278 void symbol__elf_init(void); 279 int symbol__annotation_init(void); 280 281 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 282 size_t __symbol__fprintf_symname_offs(const struct symbol *sym, 283 const struct addr_location *al, 284 bool unknown_as_addr, FILE *fp); 285 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 286 const struct addr_location *al, FILE *fp); 287 size_t __symbol__fprintf_symname(const struct symbol *sym, 288 const struct addr_location *al, 289 bool unknown_as_addr, FILE *fp); 290 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 291 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 292 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 293 bool symbol__restricted_filename(const char *filename, 294 const char *restricted_filename); 295 int symbol__config_symfs(const struct option *opt __maybe_unused, 296 const char *dir, int unset __maybe_unused); 297 298 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 299 struct symsrc *runtime_ss, int kmodule); 300 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 301 struct map *map); 302 303 void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel); 304 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 305 void symbols__fixup_duplicate(struct rb_root *symbols); 306 void symbols__fixup_end(struct rb_root *symbols); 307 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 308 309 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 310 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 311 bool *is_64_bit); 312 313 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 314 315 struct kcore_extract { 316 char *kcore_filename; 317 u64 addr; 318 u64 offs; 319 u64 len; 320 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 321 int fd; 322 }; 323 324 int kcore_extract__create(struct kcore_extract *kce); 325 void kcore_extract__delete(struct kcore_extract *kce); 326 327 int kcore_copy(const char *from_dir, const char *to_dir); 328 int compare_proc_modules(const char *from, const char *to); 329 330 int setup_list(struct strlist **list, const char *list_str, 331 const char *list_name); 332 int setup_intlist(struct intlist **list, const char *list_str, 333 const char *list_name); 334 335 #ifdef HAVE_LIBELF_SUPPORT 336 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr); 337 void arch__sym_update(struct symbol *s, GElf_Sym *sym); 338 #endif 339 340 #define SYMBOL_A 0 341 #define SYMBOL_B 1 342 343 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb); 344 345 /* structure containing an SDT note's info */ 346 struct sdt_note { 347 char *name; /* name of the note*/ 348 char *provider; /* provider name */ 349 bool bit32; /* whether the location is 32 bits? */ 350 union { /* location, base and semaphore addrs */ 351 Elf64_Addr a64[3]; 352 Elf32_Addr a32[3]; 353 } addr; 354 struct list_head note_list; /* SDT notes' list */ 355 }; 356 357 int get_sdt_note_list(struct list_head *head, const char *target); 358 int cleanup_sdt_note_list(struct list_head *sdt_notes); 359 int sdt_notes__get_count(struct list_head *start); 360 361 #define SDT_BASE_SCN ".stapsdt.base" 362 #define SDT_NOTE_SCN ".note.stapsdt" 363 #define SDT_NOTE_TYPE 3 364 #define SDT_NOTE_NAME "stapsdt" 365 #define NR_ADDR 3 366 367 #endif /* __PERF_SYMBOL */ 368