1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define __PERF_SYMBOL 1
5 #include <linux/types.h>
6 #include <linux/refcount.h>
9 #include <linux/list.h>
10 #include <linux/rbtree.h>
12 #include "addr_location.h"
14 #include "symbol_conf.h"
17 #ifdef HAVE_LIBELF_SUPPORT
30 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
31 * for newer versions we can use mmap to reduce memory usage:
33 #ifdef ELF_C_READ_MMAP
34 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
36 # define PERF_ELF_C_READ_MMAP ELF_C_READ
39 #ifdef HAVE_LIBELF_SUPPORT
40 Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
41 GElf_Shdr *shp, const char *name, size_t *idx);
45 * A symtab entry. When allocated this may be preceded by an annotation (see
46 * symbol__annotation) and/or a browser_index (see symbol__browser_index).
49 struct rb_node rb_node;
50 /** Range of symbol [start, end). */
53 /** Length of the string name. */
55 /** ELF symbol type as defined for st_info. E.g STT_OBJECT or STT_FUNC. */
57 /** ELF binding type as defined for st_info. E.g. STB_WEAK or STB_GLOBAL. */
59 /** Set true for kernel symbols of idle routines. */
61 /** Resolvable but tools ignore it (e.g. idle routines). */
63 /** Symbol for an inlined function. */
65 /** Has symbol__annotate2 been performed. */
67 /** Symbol is an alias of an STT_GNU_IFUNC */
69 /** Architecture specific. Unused except on PPC where it holds st_other. */
71 /** The name of length namelen associated with the symbol. */
75 void symbol__delete(struct symbol *sym);
76 void symbols__delete(struct rb_root_cached *symbols);
78 /* symbols__for_each_entry - iterate over symbols (rb_root)
80 * @symbols: the rb_root of symbols
81 * @pos: the 'struct symbol *' to use as a loop cursor
82 * @nd: the 'struct rb_node *' to use as a temporary storage
84 #define symbols__for_each_entry(symbols, pos, nd) \
85 for (nd = rb_first_cached(symbols); \
86 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
89 static inline size_t symbol__size(const struct symbol *sym)
91 return sym->end - sym->start;
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;
118 int dso__load(struct dso *dso, struct map *map);
119 int dso__load_vmlinux(struct dso *dso, struct map *map,
120 const char *vmlinux, bool vmlinux_allocated);
121 int dso__load_vmlinux_path(struct dso *dso, struct map *map);
122 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
124 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
126 void dso__insert_symbol(struct dso *dso,
128 void dso__delete_symbol(struct dso *dso,
131 struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
132 struct symbol *dso__find_symbol_nocache(struct dso *dso, u64 addr);
134 struct symbol *dso__next_symbol_by_name(struct dso *dso, size_t *idx);
135 struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name, size_t *idx);
137 struct symbol *dso__first_symbol(struct dso *dso);
138 struct symbol *dso__last_symbol(struct dso *dso);
139 struct symbol *dso__next_symbol(struct symbol *sym);
141 enum dso_type dso__type_fd(int fd);
143 int filename__read_build_id(const char *filename, struct build_id *id);
144 int sysfs__read_build_id(const char *filename, struct build_id *bid);
145 int modules__parse(const char *filename, void *arg,
146 int (*process_module)(void *arg, const char *name,
147 u64 start, u64 size));
148 int filename__read_debuglink(const char *filename, char *debuglink,
150 bool filename__has_section(const char *filename, const char *sec);
153 int symbol__init(struct perf_env *env);
154 void symbol__exit(void);
155 void symbol__elf_init(void);
156 int symbol__annotation_init(void);
158 struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
159 size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
160 const struct addr_location *al,
161 bool unknown_as_addr,
162 bool print_offsets, FILE *fp);
163 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
164 const struct addr_location *al, FILE *fp);
165 size_t __symbol__fprintf_symname(const struct symbol *sym,
166 const struct addr_location *al,
167 bool unknown_as_addr, FILE *fp);
168 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
169 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
170 bool symbol__restricted_filename(const char *filename,
171 const char *restricted_filename);
172 int symbol__config_symfs(const struct option *opt __maybe_unused,
173 const char *dir, int unset __maybe_unused);
177 #ifdef HAVE_LIBBFD_SUPPORT
178 int dso__load_bfd_symbols(struct dso *dso, const char *debugfile);
181 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
182 struct symsrc *runtime_ss, int kmodule);
183 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
185 char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
187 void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
189 void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
190 void symbols__fixup_duplicate(struct rb_root_cached *symbols);
191 void symbols__fixup_end(struct rb_root_cached *symbols, bool is_kallsyms);
193 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
194 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
197 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
199 struct kcore_extract {
200 char *kcore_filename;
204 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
208 int kcore_extract__create(struct kcore_extract *kce);
209 void kcore_extract__delete(struct kcore_extract *kce);
211 int kcore_copy(const char *from_dir, const char *to_dir);
212 int compare_proc_modules(const char *from, const char *to);
214 int setup_list(struct strlist **list, const char *list_str,
215 const char *list_name);
216 int setup_intlist(struct intlist **list, const char *list_str,
217 const char *list_name);
219 #ifdef HAVE_LIBELF_SUPPORT
220 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
221 void arch__sym_update(struct symbol *s, GElf_Sym *sym);
224 const char *arch__normalize_symbol_name(const char *name);
228 int arch__compare_symbol_names(const char *namea, const char *nameb);
229 int arch__compare_symbol_names_n(const char *namea, const char *nameb,
231 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
233 enum symbol_tag_include {
234 SYMBOL_TAG_INCLUDE__NONE = 0,
235 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
238 int symbol__match_symbol_name(const char *namea, const char *nameb,
239 enum symbol_tag_include includes);
241 /* structure containing an SDT note's info */
243 char *name; /* name of the note*/
244 char *provider; /* provider name */
246 bool bit32; /* whether the location is 32 bits? */
247 union { /* location, base and semaphore addrs */
251 struct list_head note_list; /* SDT notes' list */
254 int get_sdt_note_list(struct list_head *head, const char *target);
255 int cleanup_sdt_note_list(struct list_head *sdt_notes);
256 int sdt_notes__get_count(struct list_head *start);
258 #define SDT_PROBES_SCN ".probes"
259 #define SDT_BASE_SCN ".stapsdt.base"
260 #define SDT_NOTE_SCN ".note.stapsdt"
261 #define SDT_NOTE_TYPE 3
262 #define SDT_NOTE_NAME "stapsdt"
266 SDT_NOTE_IDX_LOC = 0,
271 int symbol__validate_sym_arguments(void);
273 #endif /* __PERF_SYMBOL */