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 bool ignore; 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 force, 92 ignore_vmlinux, 93 ignore_vmlinux_buildid, 94 show_kernel_path, 95 use_modules, 96 allow_aliases, 97 sort_by_name, 98 show_nr_samples, 99 show_total_period, 100 use_callchain, 101 cumulate_callchain, 102 exclude_other, 103 show_cpu_utilization, 104 initialized, 105 kptr_restrict, 106 annotate_asm_raw, 107 annotate_src, 108 event_group, 109 demangle, 110 demangle_kernel, 111 filter_relative, 112 show_hist_headers, 113 branch_callstack, 114 has_filter, 115 show_ref_callgraph, 116 hide_unresolved, 117 raw_trace, 118 report_hierarchy; 119 const char *vmlinux_name, 120 *kallsyms_name, 121 *source_prefix, 122 *field_sep; 123 const char *default_guest_vmlinux_name, 124 *default_guest_kallsyms, 125 *default_guest_modules; 126 const char *guestmount; 127 const char *dso_list_str, 128 *comm_list_str, 129 *pid_list_str, 130 *tid_list_str, 131 *sym_list_str, 132 *col_width_list_str; 133 struct strlist *dso_list, 134 *comm_list, 135 *sym_list, 136 *dso_from_list, 137 *dso_to_list, 138 *sym_from_list, 139 *sym_to_list; 140 struct intlist *pid_list, 141 *tid_list; 142 const char *symfs; 143 }; 144 145 extern struct symbol_conf symbol_conf; 146 147 struct symbol_name_rb_node { 148 struct rb_node rb_node; 149 struct symbol sym; 150 }; 151 152 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path) 153 { 154 return path__join(bf, size, symbol_conf.symfs, path); 155 } 156 157 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path) 158 159 extern int vmlinux_path__nr_entries; 160 extern char **vmlinux_path; 161 162 static inline void *symbol__priv(struct symbol *sym) 163 { 164 return ((void *)sym) - symbol_conf.priv_size; 165 } 166 167 struct ref_reloc_sym { 168 const char *name; 169 u64 addr; 170 u64 unrelocated_addr; 171 }; 172 173 struct map_symbol { 174 struct map *map; 175 struct symbol *sym; 176 }; 177 178 struct addr_map_symbol { 179 struct map *map; 180 struct symbol *sym; 181 u64 addr; 182 u64 al_addr; 183 }; 184 185 struct branch_info { 186 struct addr_map_symbol from; 187 struct addr_map_symbol to; 188 struct branch_flags flags; 189 char *srcline_from; 190 char *srcline_to; 191 }; 192 193 struct mem_info { 194 struct addr_map_symbol iaddr; 195 struct addr_map_symbol daddr; 196 union perf_mem_data_src data_src; 197 }; 198 199 struct addr_location { 200 struct machine *machine; 201 struct thread *thread; 202 struct map *map; 203 struct symbol *sym; 204 u64 addr; 205 char level; 206 u8 filtered; 207 u8 cpumode; 208 s32 cpu; 209 s32 socket; 210 }; 211 212 struct symsrc { 213 char *name; 214 int fd; 215 enum dso_binary_type type; 216 217 #ifdef HAVE_LIBELF_SUPPORT 218 Elf *elf; 219 GElf_Ehdr ehdr; 220 221 Elf_Scn *opdsec; 222 size_t opdidx; 223 GElf_Shdr opdshdr; 224 225 Elf_Scn *symtab; 226 GElf_Shdr symshdr; 227 228 Elf_Scn *dynsym; 229 size_t dynsym_idx; 230 GElf_Shdr dynshdr; 231 232 bool adjust_symbols; 233 bool is_64_bit; 234 #endif 235 }; 236 237 void symsrc__destroy(struct symsrc *ss); 238 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 239 enum dso_binary_type type); 240 bool symsrc__has_symtab(struct symsrc *ss); 241 bool symsrc__possibly_runtime(struct symsrc *ss); 242 243 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 244 int dso__load_vmlinux(struct dso *dso, struct map *map, 245 const char *vmlinux, bool vmlinux_allocated, 246 symbol_filter_t filter); 247 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 248 symbol_filter_t filter); 249 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 250 bool no_kcore, symbol_filter_t filter); 251 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 252 symbol_filter_t filter); 253 254 void dso__insert_symbol(struct dso *dso, enum map_type type, 255 struct symbol *sym); 256 257 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 258 u64 addr); 259 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 260 const char *name); 261 struct symbol *symbol__next_by_name(struct symbol *sym); 262 263 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 264 struct symbol *dso__next_symbol(struct symbol *sym); 265 266 enum dso_type dso__type_fd(int fd); 267 268 int filename__read_build_id(const char *filename, void *bf, size_t size); 269 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 270 int modules__parse(const char *filename, void *arg, 271 int (*process_module)(void *arg, const char *name, 272 u64 start)); 273 int filename__read_debuglink(const char *filename, char *debuglink, 274 size_t size); 275 276 struct perf_env; 277 int symbol__init(struct perf_env *env); 278 void symbol__exit(void); 279 void symbol__elf_init(void); 280 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 281 size_t __symbol__fprintf_symname_offs(const struct symbol *sym, 282 const struct addr_location *al, 283 bool unknown_as_addr, FILE *fp); 284 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 285 const struct addr_location *al, FILE *fp); 286 size_t __symbol__fprintf_symname(const struct symbol *sym, 287 const struct addr_location *al, 288 bool unknown_as_addr, FILE *fp); 289 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 290 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 291 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 292 bool symbol__restricted_filename(const char *filename, 293 const char *restricted_filename); 294 bool symbol__is_idle(struct symbol *sym); 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, symbol_filter_t filter, 300 int kmodule); 301 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 302 struct map *map, symbol_filter_t filter); 303 304 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 #endif /* __PERF_SYMBOL */ 346