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 #define PACKAGE 'perf' 41 #include <bfd.h> 42 #endif 43 #endif 44 45 /* 46 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP; 47 * for newer versions we can use mmap to reduce memory usage: 48 */ 49 #ifdef LIBELF_MMAP 50 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP 51 #else 52 # define PERF_ELF_C_READ_MMAP ELF_C_READ 53 #endif 54 55 #ifndef DMGL_PARAMS 56 #define DMGL_PARAMS (1 << 0) /* Include function args */ 57 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 58 #endif 59 60 /** struct symbol - symtab entry 61 * 62 * @ignore - resolvable but tools ignore it (e.g. idle routines) 63 */ 64 struct symbol { 65 struct rb_node rb_node; 66 u64 start; 67 u64 end; 68 u16 namelen; 69 u8 binding; 70 bool ignore; 71 char name[0]; 72 }; 73 74 void symbol__delete(struct symbol *sym); 75 void symbols__delete(struct rb_root *symbols); 76 77 static inline size_t symbol__size(const struct symbol *sym) 78 { 79 return sym->end - sym->start + 1; 80 } 81 82 struct strlist; 83 84 struct symbol_conf { 85 unsigned short priv_size; 86 unsigned short nr_events; 87 bool try_vmlinux_path, 88 show_kernel_path, 89 use_modules, 90 sort_by_name, 91 show_nr_samples, 92 show_total_period, 93 use_callchain, 94 exclude_other, 95 show_cpu_utilization, 96 initialized, 97 kptr_restrict, 98 annotate_asm_raw, 99 annotate_src, 100 event_group; 101 const char *vmlinux_name, 102 *kallsyms_name, 103 *source_prefix, 104 *field_sep; 105 const char *default_guest_vmlinux_name, 106 *default_guest_kallsyms, 107 *default_guest_modules; 108 const char *guestmount; 109 const char *dso_list_str, 110 *comm_list_str, 111 *sym_list_str, 112 *col_width_list_str; 113 struct strlist *dso_list, 114 *comm_list, 115 *sym_list, 116 *dso_from_list, 117 *dso_to_list, 118 *sym_from_list, 119 *sym_to_list; 120 const char *symfs; 121 }; 122 123 extern struct symbol_conf symbol_conf; 124 extern int vmlinux_path__nr_entries; 125 extern char **vmlinux_path; 126 127 static inline void *symbol__priv(struct symbol *sym) 128 { 129 return ((void *)sym) - symbol_conf.priv_size; 130 } 131 132 struct ref_reloc_sym { 133 const char *name; 134 u64 addr; 135 u64 unrelocated_addr; 136 }; 137 138 struct map_symbol { 139 struct map *map; 140 struct symbol *sym; 141 bool unfolded; 142 bool has_children; 143 }; 144 145 struct addr_map_symbol { 146 struct map *map; 147 struct symbol *sym; 148 u64 addr; 149 u64 al_addr; 150 }; 151 152 struct branch_info { 153 struct addr_map_symbol from; 154 struct addr_map_symbol to; 155 struct branch_flags flags; 156 }; 157 158 struct addr_location { 159 struct thread *thread; 160 struct map *map; 161 struct symbol *sym; 162 u64 addr; 163 char level; 164 bool filtered; 165 u8 cpumode; 166 s32 cpu; 167 }; 168 169 struct symsrc { 170 char *name; 171 int fd; 172 enum dso_binary_type type; 173 174 #ifdef LIBELF_SUPPORT 175 Elf *elf; 176 GElf_Ehdr ehdr; 177 178 Elf_Scn *opdsec; 179 size_t opdidx; 180 GElf_Shdr opdshdr; 181 182 Elf_Scn *symtab; 183 GElf_Shdr symshdr; 184 185 Elf_Scn *dynsym; 186 size_t dynsym_idx; 187 GElf_Shdr dynshdr; 188 189 bool adjust_symbols; 190 #endif 191 }; 192 193 void symsrc__destroy(struct symsrc *ss); 194 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 195 enum dso_binary_type type); 196 bool symsrc__has_symtab(struct symsrc *ss); 197 bool symsrc__possibly_runtime(struct symsrc *ss); 198 199 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 200 int dso__load_vmlinux(struct dso *dso, struct map *map, 201 const char *vmlinux, symbol_filter_t filter); 202 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 203 symbol_filter_t filter); 204 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 205 symbol_filter_t filter); 206 207 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 208 u64 addr); 209 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 210 const char *name); 211 212 int filename__read_build_id(const char *filename, void *bf, size_t size); 213 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 214 int kallsyms__parse(const char *filename, void *arg, 215 int (*process_symbol)(void *arg, const char *name, 216 char type, u64 start)); 217 int filename__read_debuglink(const char *filename, char *debuglink, 218 size_t size); 219 220 int symbol__init(void); 221 void symbol__exit(void); 222 void symbol__elf_init(void); 223 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 224 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 225 const struct addr_location *al, FILE *fp); 226 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 227 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 228 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 229 bool symbol__restricted_filename(const char *filename, 230 const char *restricted_filename); 231 232 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 233 struct symsrc *runtime_ss, symbol_filter_t filter, 234 int kmodule); 235 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 236 struct map *map, symbol_filter_t filter); 237 238 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 239 void symbols__fixup_duplicate(struct rb_root *symbols); 240 void symbols__fixup_end(struct rb_root *symbols); 241 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 242 243 #endif /* __PERF_SYMBOL */ 244