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 extern 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 /** struct symbol - symtab entry 48 * 49 * @ignore - resolvable but tools ignore it (e.g. idle routines) 50 */ 51 struct symbol { 52 struct rb_node rb_node; 53 u64 start; 54 u64 end; 55 u16 namelen; 56 u8 binding; 57 bool ignore; 58 char name[0]; 59 }; 60 61 void symbol__delete(struct symbol *sym); 62 void symbols__delete(struct rb_root *symbols); 63 64 /* symbols__for_each_entry - iterate over symbols (rb_root) 65 * 66 * @symbols: the rb_root of symbols 67 * @pos: the 'struct symbol *' to use as a loop cursor 68 * @nd: the 'struct rb_node *' to use as a temporary storage 69 */ 70 #define symbols__for_each_entry(symbols, pos, nd) \ 71 for (nd = rb_first(symbols); \ 72 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \ 73 nd = rb_next(nd)) 74 75 static inline size_t symbol__size(const struct symbol *sym) 76 { 77 return sym->end - sym->start; 78 } 79 80 struct strlist; 81 struct intlist; 82 83 struct symbol_conf { 84 unsigned short priv_size; 85 unsigned short nr_events; 86 bool try_vmlinux_path, 87 force, 88 ignore_vmlinux, 89 ignore_vmlinux_buildid, 90 show_kernel_path, 91 use_modules, 92 allow_aliases, 93 sort_by_name, 94 show_nr_samples, 95 show_total_period, 96 use_callchain, 97 cumulate_callchain, 98 exclude_other, 99 show_cpu_utilization, 100 initialized, 101 kptr_restrict, 102 annotate_asm_raw, 103 annotate_src, 104 event_group, 105 demangle, 106 demangle_kernel, 107 filter_relative, 108 show_hist_headers, 109 branch_callstack, 110 has_filter, 111 show_ref_callgraph, 112 hide_unresolved, 113 raw_trace; 114 const char *vmlinux_name, 115 *kallsyms_name, 116 *source_prefix, 117 *field_sep; 118 const char *default_guest_vmlinux_name, 119 *default_guest_kallsyms, 120 *default_guest_modules; 121 const char *guestmount; 122 const char *dso_list_str, 123 *comm_list_str, 124 *pid_list_str, 125 *tid_list_str, 126 *sym_list_str, 127 *col_width_list_str; 128 struct strlist *dso_list, 129 *comm_list, 130 *sym_list, 131 *dso_from_list, 132 *dso_to_list, 133 *sym_from_list, 134 *sym_to_list; 135 struct intlist *pid_list, 136 *tid_list; 137 const char *symfs; 138 }; 139 140 extern struct symbol_conf symbol_conf; 141 142 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path) 143 { 144 return path__join(bf, size, symbol_conf.symfs, path); 145 } 146 147 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path) 148 149 extern int vmlinux_path__nr_entries; 150 extern char **vmlinux_path; 151 152 static inline void *symbol__priv(struct symbol *sym) 153 { 154 return ((void *)sym) - symbol_conf.priv_size; 155 } 156 157 struct ref_reloc_sym { 158 const char *name; 159 u64 addr; 160 u64 unrelocated_addr; 161 }; 162 163 struct map_symbol { 164 struct map *map; 165 struct symbol *sym; 166 }; 167 168 struct addr_map_symbol { 169 struct map *map; 170 struct symbol *sym; 171 u64 addr; 172 u64 al_addr; 173 }; 174 175 struct branch_info { 176 struct addr_map_symbol from; 177 struct addr_map_symbol to; 178 struct branch_flags flags; 179 }; 180 181 struct mem_info { 182 struct addr_map_symbol iaddr; 183 struct addr_map_symbol daddr; 184 union perf_mem_data_src data_src; 185 }; 186 187 struct addr_location { 188 struct machine *machine; 189 struct thread *thread; 190 struct map *map; 191 struct symbol *sym; 192 u64 addr; 193 char level; 194 u8 filtered; 195 u8 cpumode; 196 s32 cpu; 197 s32 socket; 198 }; 199 200 struct symsrc { 201 char *name; 202 int fd; 203 enum dso_binary_type type; 204 205 #ifdef HAVE_LIBELF_SUPPORT 206 Elf *elf; 207 GElf_Ehdr ehdr; 208 209 Elf_Scn *opdsec; 210 size_t opdidx; 211 GElf_Shdr opdshdr; 212 213 Elf_Scn *symtab; 214 GElf_Shdr symshdr; 215 216 Elf_Scn *dynsym; 217 size_t dynsym_idx; 218 GElf_Shdr dynshdr; 219 220 bool adjust_symbols; 221 bool is_64_bit; 222 #endif 223 }; 224 225 void symsrc__destroy(struct symsrc *ss); 226 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 227 enum dso_binary_type type); 228 bool symsrc__has_symtab(struct symsrc *ss); 229 bool symsrc__possibly_runtime(struct symsrc *ss); 230 231 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 232 int dso__load_vmlinux(struct dso *dso, struct map *map, 233 const char *vmlinux, bool vmlinux_allocated, 234 symbol_filter_t filter); 235 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 236 symbol_filter_t filter); 237 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 238 symbol_filter_t filter); 239 240 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 241 u64 addr); 242 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 243 const char *name); 244 struct symbol *symbol__next_by_name(struct symbol *sym); 245 246 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 247 struct symbol *dso__next_symbol(struct symbol *sym); 248 249 enum dso_type dso__type_fd(int fd); 250 251 int filename__read_build_id(const char *filename, void *bf, size_t size); 252 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 253 int modules__parse(const char *filename, void *arg, 254 int (*process_module)(void *arg, const char *name, 255 u64 start)); 256 int filename__read_debuglink(const char *filename, char *debuglink, 257 size_t size); 258 259 struct perf_env; 260 int symbol__init(struct perf_env *env); 261 void symbol__exit(void); 262 void symbol__elf_init(void); 263 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 264 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 265 const struct addr_location *al, FILE *fp); 266 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 267 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 268 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 269 bool symbol__restricted_filename(const char *filename, 270 const char *restricted_filename); 271 bool symbol__is_idle(struct symbol *sym); 272 273 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 274 struct symsrc *runtime_ss, symbol_filter_t filter, 275 int kmodule); 276 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 277 struct map *map, symbol_filter_t filter); 278 279 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 280 void symbols__fixup_duplicate(struct rb_root *symbols); 281 void symbols__fixup_end(struct rb_root *symbols); 282 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 283 284 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 285 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 286 bool *is_64_bit); 287 288 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 289 290 struct kcore_extract { 291 char *kcore_filename; 292 u64 addr; 293 u64 offs; 294 u64 len; 295 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 296 int fd; 297 }; 298 299 int kcore_extract__create(struct kcore_extract *kce); 300 void kcore_extract__delete(struct kcore_extract *kce); 301 302 int kcore_copy(const char *from_dir, const char *to_dir); 303 int compare_proc_modules(const char *from, const char *to); 304 305 int setup_list(struct strlist **list, const char *list_str, 306 const char *list_name); 307 int setup_intlist(struct intlist **list, const char *list_str, 308 const char *list_name); 309 310 #ifdef HAVE_LIBELF_SUPPORT 311 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr); 312 void arch__elf_sym_adjust(GElf_Sym *sym); 313 #endif 314 315 #define SYMBOL_A 0 316 #define SYMBOL_B 1 317 318 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb); 319 320 #endif /* __PERF_SYMBOL */ 321