1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define __PERF_SYMBOL 1
5 #include <linux/types.h>
8 #include <linux/list.h>
9 #include <linux/rbtree.h>
13 #include "symbol_conf.h"
15 #ifdef HAVE_LIBELF_SUPPORT
28 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
29 * for newer versions we can use mmap to reduce memory usage:
31 #ifdef HAVE_LIBELF_MMAP_SUPPORT
32 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
34 # define PERF_ELF_C_READ_MMAP ELF_C_READ
37 #ifdef HAVE_LIBELF_SUPPORT
38 Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
39 GElf_Shdr *shp, const char *name, size_t *idx);
43 #define DMGL_NO_OPTS 0 /* For readability... */
44 #define DMGL_PARAMS (1 << 0) /* Include function args */
45 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
48 #define DSO__NAME_KALLSYMS "[kernel.kallsyms]"
49 #define DSO__NAME_KCORE "[kernel.kcore]"
51 /** struct symbol - symtab entry
53 * @ignore - resolvable but tools ignore it (e.g. idle routines)
56 struct rb_node rb_node;
70 void symbol__delete(struct symbol *sym);
71 void symbols__delete(struct rb_root_cached *symbols);
73 /* symbols__for_each_entry - iterate over symbols (rb_root)
75 * @symbols: the rb_root of symbols
76 * @pos: the 'struct symbol *' to use as a loop cursor
77 * @nd: the 'struct rb_node *' to use as a temporary storage
79 #define symbols__for_each_entry(symbols, pos, nd) \
80 for (nd = rb_first_cached(symbols); \
81 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
84 static inline size_t symbol__size(const struct symbol *sym)
86 return sym->end - sym->start;
92 struct symbol_name_rb_node {
93 struct rb_node rb_node;
97 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
99 return path__join(bf, size, symbol_conf.symfs, path);
102 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
104 extern int vmlinux_path__nr_entries;
105 extern char **vmlinux_path;
107 static inline void *symbol__priv(struct symbol *sym)
109 return ((void *)sym) - symbol_conf.priv_size;
112 struct ref_reloc_sym {
115 u64 unrelocated_addr;
123 struct addr_map_symbol {
132 struct addr_map_symbol from;
133 struct addr_map_symbol to;
134 struct branch_flags flags;
140 struct addr_map_symbol iaddr;
141 struct addr_map_symbol daddr;
142 union perf_mem_data_src data_src;
146 struct addr_location {
147 struct machine *machine;
148 struct thread *thread;
163 enum dso_binary_type type;
165 #ifdef HAVE_LIBELF_SUPPORT
185 void symsrc__destroy(struct symsrc *ss);
186 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
187 enum dso_binary_type type);
188 bool symsrc__has_symtab(struct symsrc *ss);
189 bool symsrc__possibly_runtime(struct symsrc *ss);
191 int dso__load(struct dso *dso, struct map *map);
192 int dso__load_vmlinux(struct dso *dso, struct map *map,
193 const char *vmlinux, bool vmlinux_allocated);
194 int dso__load_vmlinux_path(struct dso *dso, struct map *map);
195 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
197 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
199 void dso__insert_symbol(struct dso *dso,
202 struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
203 struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name);
205 struct symbol *symbol__next_by_name(struct symbol *sym);
207 struct symbol *dso__first_symbol(struct dso *dso);
208 struct symbol *dso__last_symbol(struct dso *dso);
209 struct symbol *dso__next_symbol(struct symbol *sym);
211 enum dso_type dso__type_fd(int fd);
213 int filename__read_build_id(const char *filename, void *bf, size_t size);
214 int sysfs__read_build_id(const char *filename, void *bf, size_t size);
215 int modules__parse(const char *filename, void *arg,
216 int (*process_module)(void *arg, const char *name,
217 u64 start, u64 size));
218 int filename__read_debuglink(const char *filename, char *debuglink,
222 int symbol__init(struct perf_env *env);
223 void symbol__exit(void);
224 void symbol__elf_init(void);
225 int symbol__annotation_init(void);
227 struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
228 size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
229 const struct addr_location *al,
230 bool unknown_as_addr,
231 bool print_offsets, FILE *fp);
232 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
233 const struct addr_location *al, FILE *fp);
234 size_t __symbol__fprintf_symname(const struct symbol *sym,
235 const struct addr_location *al,
236 bool unknown_as_addr, FILE *fp);
237 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
238 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
239 bool symbol__restricted_filename(const char *filename,
240 const char *restricted_filename);
241 int symbol__config_symfs(const struct option *opt __maybe_unused,
242 const char *dir, int unset __maybe_unused);
244 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
245 struct symsrc *runtime_ss, int kmodule);
246 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
248 char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
250 void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
252 void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
253 void symbols__fixup_duplicate(struct rb_root_cached *symbols);
254 void symbols__fixup_end(struct rb_root_cached *symbols);
255 void map_groups__fixup_end(struct map_groups *mg);
257 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
258 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
261 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
263 struct kcore_extract {
264 char *kcore_filename;
268 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
272 int kcore_extract__create(struct kcore_extract *kce);
273 void kcore_extract__delete(struct kcore_extract *kce);
275 int kcore_copy(const char *from_dir, const char *to_dir);
276 int compare_proc_modules(const char *from, const char *to);
278 int setup_list(struct strlist **list, const char *list_str,
279 const char *list_name);
280 int setup_intlist(struct intlist **list, const char *list_str,
281 const char *list_name);
283 #ifdef HAVE_LIBELF_SUPPORT
284 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
285 void arch__sym_update(struct symbol *s, GElf_Sym *sym);
288 const char *arch__normalize_symbol_name(const char *name);
292 int arch__compare_symbol_names(const char *namea, const char *nameb);
293 int arch__compare_symbol_names_n(const char *namea, const char *nameb,
295 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
297 enum symbol_tag_include {
298 SYMBOL_TAG_INCLUDE__NONE = 0,
299 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
302 int symbol__match_symbol_name(const char *namea, const char *nameb,
303 enum symbol_tag_include includes);
305 /* structure containing an SDT note's info */
307 char *name; /* name of the note*/
308 char *provider; /* provider name */
310 bool bit32; /* whether the location is 32 bits? */
311 union { /* location, base and semaphore addrs */
315 struct list_head note_list; /* SDT notes' list */
318 int get_sdt_note_list(struct list_head *head, const char *target);
319 int cleanup_sdt_note_list(struct list_head *sdt_notes);
320 int sdt_notes__get_count(struct list_head *start);
322 #define SDT_PROBES_SCN ".probes"
323 #define SDT_BASE_SCN ".stapsdt.base"
324 #define SDT_NOTE_SCN ".note.stapsdt"
325 #define SDT_NOTE_TYPE 3
326 #define SDT_NOTE_NAME "stapsdt"
330 SDT_NOTE_IDX_LOC = 0,
335 struct mem_info *mem_info__new(void);
336 struct mem_info *mem_info__get(struct mem_info *mi);
337 void mem_info__put(struct mem_info *mi);
339 static inline void __mem_info__zput(struct mem_info **mi)
345 #define mem_info__zput(mi) __mem_info__zput(&mi)
347 #endif /* __PERF_SYMBOL */