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 #include <elf.h> 20 #endif 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 const char *vmlinux_name, 101 *kallsyms_name, 102 *source_prefix, 103 *field_sep; 104 const char *default_guest_vmlinux_name, 105 *default_guest_kallsyms, 106 *default_guest_modules; 107 const char *guestmount; 108 const char *dso_list_str, 109 *comm_list_str, 110 *sym_list_str, 111 *col_width_list_str; 112 struct strlist *dso_list, 113 *comm_list, 114 *sym_list, 115 *dso_from_list, 116 *dso_to_list, 117 *sym_from_list, 118 *sym_to_list; 119 const char *symfs; 120 }; 121 122 extern struct symbol_conf symbol_conf; 123 124 static inline void *symbol__priv(struct symbol *sym) 125 { 126 return ((void *)sym) - symbol_conf.priv_size; 127 } 128 129 struct ref_reloc_sym { 130 const char *name; 131 u64 addr; 132 u64 unrelocated_addr; 133 }; 134 135 struct map_symbol { 136 struct map *map; 137 struct symbol *sym; 138 bool unfolded; 139 bool has_children; 140 }; 141 142 struct addr_map_symbol { 143 struct map *map; 144 struct symbol *sym; 145 u64 addr; 146 u64 al_addr; 147 }; 148 149 struct branch_info { 150 struct addr_map_symbol from; 151 struct addr_map_symbol to; 152 struct branch_flags flags; 153 }; 154 155 struct addr_location { 156 struct thread *thread; 157 struct map *map; 158 struct symbol *sym; 159 u64 addr; 160 char level; 161 bool filtered; 162 u8 cpumode; 163 s32 cpu; 164 }; 165 166 struct symsrc { 167 char *name; 168 int fd; 169 enum dso_binary_type type; 170 171 #ifdef LIBELF_SUPPORT 172 Elf *elf; 173 GElf_Ehdr ehdr; 174 175 Elf_Scn *opdsec; 176 size_t opdidx; 177 GElf_Shdr opdshdr; 178 179 Elf_Scn *symtab; 180 GElf_Shdr symshdr; 181 182 Elf_Scn *dynsym; 183 size_t dynsym_idx; 184 GElf_Shdr dynshdr; 185 186 bool adjust_symbols; 187 #endif 188 }; 189 190 void symsrc__destroy(struct symsrc *ss); 191 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 192 enum dso_binary_type type); 193 bool symsrc__has_symtab(struct symsrc *ss); 194 bool symsrc__possibly_runtime(struct symsrc *ss); 195 196 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 197 int dso__load_vmlinux(struct dso *dso, struct map *map, 198 const char *vmlinux, symbol_filter_t filter); 199 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 200 symbol_filter_t filter); 201 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 202 symbol_filter_t filter); 203 204 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 205 u64 addr); 206 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 207 const char *name); 208 209 int filename__read_build_id(const char *filename, void *bf, size_t size); 210 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 211 int kallsyms__parse(const char *filename, void *arg, 212 int (*process_symbol)(void *arg, const char *name, 213 char type, u64 start)); 214 int filename__read_debuglink(const char *filename, char *debuglink, 215 size_t size); 216 217 int symbol__init(void); 218 void symbol__exit(void); 219 void symbol__elf_init(void); 220 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 221 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 222 const struct addr_location *al, FILE *fp); 223 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 224 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 225 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 226 227 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 228 struct symsrc *runtime_ss, symbol_filter_t filter, 229 int kmodule); 230 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 231 struct map *map, symbol_filter_t filter); 232 233 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 234 void symbols__fixup_duplicate(struct rb_root *symbols); 235 void symbols__fixup_end(struct rb_root *symbols); 236 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 237 238 #endif /* __PERF_SYMBOL */ 239