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 16 #ifdef LIBELF_SUPPORT 17 #include <libelf.h> 18 #include <gelf.h> 19 #endif 20 #include <elf.h> 21 22 #include "dso.h" 23 24 #ifdef HAVE_CPLUS_DEMANGLE 25 extern char *cplus_demangle(const char *, int); 26 27 static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i) 28 { 29 return cplus_demangle(c, i); 30 } 31 #else 32 #ifdef NO_DEMANGLE 33 static inline char *bfd_demangle(void __maybe_unused *v, 34 const char __maybe_unused *c, 35 int __maybe_unused i) 36 { 37 return NULL; 38 } 39 #else 40 #ifdef ANDROID 41 /* in external/gcc-demangle */ 42 extern char *__cxa_demangle (const char *, char *, size_t *, int *); 43 44 static inline char *bfd_demangle(void *v, const char *c, int i) 45 { 46 return __cxa_demangle(c, NULL, NULL, NULL); 47 } 48 #else 49 #define PACKAGE 'perf' 50 #include <bfd.h> 51 #endif 52 #endif 53 #endif 54 55 /* 56 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP; 57 * for newer versions we can use mmap to reduce memory usage: 58 */ 59 #ifdef LIBELF_MMAP 60 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP 61 #else 62 # define PERF_ELF_C_READ_MMAP ELF_C_READ 63 #endif 64 65 #ifndef DMGL_PARAMS 66 #define DMGL_PARAMS (1 << 0) /* Include function args */ 67 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 68 #endif 69 70 /** struct symbol - symtab entry 71 * 72 * @ignore - resolvable but tools ignore it (e.g. idle routines) 73 */ 74 struct symbol { 75 struct rb_node rb_node; 76 u64 start; 77 u64 end; 78 u16 namelen; 79 u8 binding; 80 bool ignore; 81 char name[0]; 82 }; 83 84 void symbol__delete(struct symbol *sym); 85 void symbols__delete(struct rb_root *symbols); 86 87 static inline size_t symbol__size(const struct symbol *sym) 88 { 89 return sym->end - sym->start + 1; 90 } 91 92 struct strlist; 93 94 struct symbol_conf { 95 unsigned short priv_size; 96 unsigned short nr_events; 97 bool try_vmlinux_path, 98 show_kernel_path, 99 use_modules, 100 sort_by_name, 101 show_nr_samples, 102 show_total_period, 103 use_callchain, 104 exclude_other, 105 show_cpu_utilization, 106 initialized, 107 kptr_restrict, 108 annotate_asm_raw, 109 annotate_src, 110 event_group, 111 demangle; 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 *sym_list_str, 123 *col_width_list_str; 124 struct strlist *dso_list, 125 *comm_list, 126 *sym_list, 127 *dso_from_list, 128 *dso_to_list, 129 *sym_from_list, 130 *sym_to_list; 131 const char *symfs; 132 }; 133 134 extern struct symbol_conf symbol_conf; 135 extern int vmlinux_path__nr_entries; 136 extern char **vmlinux_path; 137 138 static inline void *symbol__priv(struct symbol *sym) 139 { 140 return ((void *)sym) - symbol_conf.priv_size; 141 } 142 143 struct ref_reloc_sym { 144 const char *name; 145 u64 addr; 146 u64 unrelocated_addr; 147 }; 148 149 struct map_symbol { 150 struct map *map; 151 struct symbol *sym; 152 bool unfolded; 153 bool has_children; 154 }; 155 156 struct addr_map_symbol { 157 struct map *map; 158 struct symbol *sym; 159 u64 addr; 160 u64 al_addr; 161 }; 162 163 struct branch_info { 164 struct addr_map_symbol from; 165 struct addr_map_symbol to; 166 struct branch_flags flags; 167 }; 168 169 struct mem_info { 170 struct addr_map_symbol iaddr; 171 struct addr_map_symbol daddr; 172 union perf_mem_data_src data_src; 173 }; 174 175 struct addr_location { 176 struct thread *thread; 177 struct map *map; 178 struct symbol *sym; 179 u64 addr; 180 char level; 181 bool filtered; 182 u8 cpumode; 183 s32 cpu; 184 }; 185 186 struct symsrc { 187 char *name; 188 int fd; 189 enum dso_binary_type type; 190 191 #ifdef LIBELF_SUPPORT 192 Elf *elf; 193 GElf_Ehdr ehdr; 194 195 Elf_Scn *opdsec; 196 size_t opdidx; 197 GElf_Shdr opdshdr; 198 199 Elf_Scn *symtab; 200 GElf_Shdr symshdr; 201 202 Elf_Scn *dynsym; 203 size_t dynsym_idx; 204 GElf_Shdr dynshdr; 205 206 bool adjust_symbols; 207 #endif 208 }; 209 210 void symsrc__destroy(struct symsrc *ss); 211 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 212 enum dso_binary_type type); 213 bool symsrc__has_symtab(struct symsrc *ss); 214 bool symsrc__possibly_runtime(struct symsrc *ss); 215 216 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 217 int dso__load_vmlinux(struct dso *dso, struct map *map, 218 const char *vmlinux, symbol_filter_t filter); 219 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 220 symbol_filter_t filter); 221 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 222 symbol_filter_t filter); 223 224 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 225 u64 addr); 226 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 227 const char *name); 228 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 229 230 int filename__read_build_id(const char *filename, void *bf, size_t size); 231 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 232 int kallsyms__parse(const char *filename, void *arg, 233 int (*process_symbol)(void *arg, const char *name, 234 char type, u64 start)); 235 int filename__read_debuglink(const char *filename, char *debuglink, 236 size_t size); 237 238 int symbol__init(void); 239 void symbol__exit(void); 240 void symbol__elf_init(void); 241 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 242 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 243 const struct addr_location *al, FILE *fp); 244 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 245 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 246 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 247 bool symbol__restricted_filename(const char *filename, 248 const char *restricted_filename); 249 250 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 251 struct symsrc *runtime_ss, symbol_filter_t filter, 252 int kmodule); 253 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 254 struct map *map, symbol_filter_t filter); 255 256 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 257 void symbols__fixup_duplicate(struct rb_root *symbols); 258 void symbols__fixup_end(struct rb_root *symbols); 259 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 260 261 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 262 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 263 bool *is_64_bit); 264 265 #endif /* __PERF_SYMBOL */ 266
