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 const char *vmlinux_name, 113 *kallsyms_name, 114 *source_prefix, 115 *field_sep; 116 const char *default_guest_vmlinux_name, 117 *default_guest_kallsyms, 118 *default_guest_modules; 119 const char *guestmount; 120 const char *dso_list_str, 121 *comm_list_str, 122 *pid_list_str, 123 *tid_list_str, 124 *sym_list_str, 125 *col_width_list_str; 126 struct strlist *dso_list, 127 *comm_list, 128 *sym_list, 129 *dso_from_list, 130 *dso_to_list, 131 *sym_from_list, 132 *sym_to_list; 133 struct intlist *pid_list, 134 *tid_list; 135 const char *symfs; 136 }; 137 138 extern struct symbol_conf symbol_conf; 139 140 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path) 141 { 142 return path__join(bf, size, symbol_conf.symfs, path); 143 } 144 145 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path) 146 147 extern int vmlinux_path__nr_entries; 148 extern char **vmlinux_path; 149 150 static inline void *symbol__priv(struct symbol *sym) 151 { 152 return ((void *)sym) - symbol_conf.priv_size; 153 } 154 155 struct ref_reloc_sym { 156 const char *name; 157 u64 addr; 158 u64 unrelocated_addr; 159 }; 160 161 struct map_symbol { 162 struct map *map; 163 struct symbol *sym; 164 }; 165 166 struct addr_map_symbol { 167 struct map *map; 168 struct symbol *sym; 169 u64 addr; 170 u64 al_addr; 171 }; 172 173 struct branch_info { 174 struct addr_map_symbol from; 175 struct addr_map_symbol to; 176 struct branch_flags flags; 177 }; 178 179 struct mem_info { 180 struct addr_map_symbol iaddr; 181 struct addr_map_symbol daddr; 182 union perf_mem_data_src data_src; 183 }; 184 185 struct addr_location { 186 struct machine *machine; 187 struct thread *thread; 188 struct map *map; 189 struct symbol *sym; 190 u64 addr; 191 char level; 192 u8 filtered; 193 u8 cpumode; 194 s32 cpu; 195 s32 socket; 196 }; 197 198 struct symsrc { 199 char *name; 200 int fd; 201 enum dso_binary_type type; 202 203 #ifdef HAVE_LIBELF_SUPPORT 204 Elf *elf; 205 GElf_Ehdr ehdr; 206 207 Elf_Scn *opdsec; 208 size_t opdidx; 209 GElf_Shdr opdshdr; 210 211 Elf_Scn *symtab; 212 GElf_Shdr symshdr; 213 214 Elf_Scn *dynsym; 215 size_t dynsym_idx; 216 GElf_Shdr dynshdr; 217 218 bool adjust_symbols; 219 bool is_64_bit; 220 #endif 221 }; 222 223 void symsrc__destroy(struct symsrc *ss); 224 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 225 enum dso_binary_type type); 226 bool symsrc__has_symtab(struct symsrc *ss); 227 bool symsrc__possibly_runtime(struct symsrc *ss); 228 229 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 230 int dso__load_vmlinux(struct dso *dso, struct map *map, 231 const char *vmlinux, bool vmlinux_allocated, 232 symbol_filter_t filter); 233 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 234 symbol_filter_t filter); 235 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 236 symbol_filter_t filter); 237 238 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 239 u64 addr); 240 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 241 const char *name); 242 struct symbol *symbol__next_by_name(struct symbol *sym); 243 244 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 245 struct symbol *dso__next_symbol(struct symbol *sym); 246 247 enum dso_type dso__type_fd(int fd); 248 249 int filename__read_build_id(const char *filename, void *bf, size_t size); 250 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 251 int modules__parse(const char *filename, void *arg, 252 int (*process_module)(void *arg, const char *name, 253 u64 start)); 254 int filename__read_debuglink(const char *filename, char *debuglink, 255 size_t size); 256 257 struct perf_env; 258 int symbol__init(struct perf_env *env); 259 void symbol__exit(void); 260 void symbol__elf_init(void); 261 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 262 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 263 const struct addr_location *al, FILE *fp); 264 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 265 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 266 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 267 bool symbol__restricted_filename(const char *filename, 268 const char *restricted_filename); 269 bool symbol__is_idle(struct symbol *sym); 270 271 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 272 struct symsrc *runtime_ss, symbol_filter_t filter, 273 int kmodule); 274 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 275 struct map *map, symbol_filter_t filter); 276 277 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 278 void symbols__fixup_duplicate(struct rb_root *symbols); 279 void symbols__fixup_end(struct rb_root *symbols); 280 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 281 282 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 283 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 284 bool *is_64_bit); 285 286 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 287 288 struct kcore_extract { 289 char *kcore_filename; 290 u64 addr; 291 u64 offs; 292 u64 len; 293 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 294 int fd; 295 }; 296 297 int kcore_extract__create(struct kcore_extract *kce); 298 void kcore_extract__delete(struct kcore_extract *kce); 299 300 int kcore_copy(const char *from_dir, const char *to_dir); 301 int compare_proc_modules(const char *from, const char *to); 302 303 int setup_list(struct strlist **list, const char *list_str, 304 const char *list_name); 305 int setup_intlist(struct intlist **list, const char *list_str, 306 const char *list_name); 307 308 #ifdef HAVE_LIBELF_SUPPORT 309 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr); 310 void arch__elf_sym_adjust(GElf_Sym *sym); 311 #endif 312 313 #define SYMBOL_A 0 314 #define SYMBOL_B 1 315 316 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb); 317 318 #endif /* __PERF_SYMBOL */ 319