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