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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_SYMBOL
3#define __PERF_SYMBOL 1
4
5#include <linux/types.h>
6#include <linux/refcount.h>
7#include <stdbool.h>
8#include <stdint.h>
9#include <linux/list.h>
10#include <linux/rbtree.h>
11#include <stdio.h>
12#include "addr_location.h"
13#include "path.h"
14#include "symbol_conf.h"
15#include "spark.h"
16
17#ifdef HAVE_LIBELF_SUPPORT
18#include <libelf.h>
19#include <gelf.h>
20#endif
21#include <elf.h>
22
23struct dso;
24struct map;
25struct maps;
26struct option;
27struct build_id;
28
29/*
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:
32 */
33#ifdef ELF_C_READ_MMAP
34# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
35#else
36# define PERF_ELF_C_READ_MMAP ELF_C_READ
37#endif
38
39#ifdef HAVE_LIBELF_SUPPORT
40Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
41 GElf_Shdr *shp, const char *name, size_t *idx);
42#endif
43
44/**
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).
47 */
48struct symbol {
49 struct rb_node rb_node;
50 /** Range of symbol [start, end). */
51 u64 start;
52 u64 end;
53 /** Length of the string name. */
54 u16 namelen;
55 /** ELF symbol type as defined for st_info. E.g STT_OBJECT or STT_FUNC. */
56 u8 type:4;
57 /** ELF binding type as defined for st_info. E.g. STB_WEAK or STB_GLOBAL. */
58 u8 binding:4;
59 /** Set true for kernel symbols of idle routines. */
60 u8 idle:1;
61 /** Resolvable but tools ignore it (e.g. idle routines). */
62 u8 ignore:1;
63 /** Symbol for an inlined function. */
64 u8 inlined:1;
65 /** Has symbol__annotate2 been performed. */
66 u8 annotate2:1;
67 /** Symbol is an alias of an STT_GNU_IFUNC */
68 u8 ifunc_alias:1;
69 /** Architecture specific. Unused except on PPC where it holds st_other. */
70 u8 arch_sym;
71 /** The name of length namelen associated with the symbol. */
72 char name[];
73};
74
75void symbol__delete(struct symbol *sym);
76void symbols__delete(struct rb_root_cached *symbols);
77
78/* symbols__for_each_entry - iterate over symbols (rb_root)
79 *
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
83 */
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)); \
87 nd = rb_next(nd))
88
89static inline size_t symbol__size(const struct symbol *sym)
90{
91 return sym->end - sym->start;
92}
93
94struct strlist;
95struct intlist;
96
97static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
98{
99 return path__join(bf, size, symbol_conf.symfs, path);
100}
101
102#define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
103
104extern int vmlinux_path__nr_entries;
105extern char **vmlinux_path;
106
107static inline void *symbol__priv(struct symbol *sym)
108{
109 return ((void *)sym) - symbol_conf.priv_size;
110}
111
112struct ref_reloc_sym {
113 const char *name;
114 u64 addr;
115 u64 unrelocated_addr;
116};
117
118int dso__load(struct dso *dso, struct map *map);
119int dso__load_vmlinux(struct dso *dso, struct map *map,
120 const char *vmlinux, bool vmlinux_allocated);
121int dso__load_vmlinux_path(struct dso *dso, struct map *map);
122int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
123 bool no_kcore);
124int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
125
126void dso__insert_symbol(struct dso *dso,
127 struct symbol *sym);
128void dso__delete_symbol(struct dso *dso,
129 struct symbol *sym);
130
131struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
132struct symbol *dso__find_symbol_nocache(struct dso *dso, u64 addr);
133
134struct symbol *dso__next_symbol_by_name(struct dso *dso, size_t *idx);
135struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name, size_t *idx);
136
137struct symbol *dso__first_symbol(struct dso *dso);
138struct symbol *dso__last_symbol(struct dso *dso);
139struct symbol *dso__next_symbol(struct symbol *sym);
140
141enum dso_type dso__type_fd(int fd);
142
143int filename__read_build_id(const char *filename, struct build_id *id);
144int sysfs__read_build_id(const char *filename, struct build_id *bid);
145int modules__parse(const char *filename, void *arg,
146 int (*process_module)(void *arg, const char *name,
147 u64 start, u64 size));
148int filename__read_debuglink(const char *filename, char *debuglink,
149 size_t size);
150bool filename__has_section(const char *filename, const char *sec);
151
152struct perf_env;
153int symbol__init(struct perf_env *env);
154void symbol__exit(void);
155void symbol__elf_init(void);
156int symbol__annotation_init(void);
157
158struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
159size_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);
163size_t symbol__fprintf_symname_offs(const struct symbol *sym,
164 const struct addr_location *al, FILE *fp);
165size_t __symbol__fprintf_symname(const struct symbol *sym,
166 const struct addr_location *al,
167 bool unknown_as_addr, FILE *fp);
168size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
169size_t symbol__fprintf(struct symbol *sym, FILE *fp);
170bool symbol__restricted_filename(const char *filename,
171 const char *restricted_filename);
172int symbol__config_symfs(const struct option *opt __maybe_unused,
173 const char *dir, int unset __maybe_unused);
174
175struct symsrc;
176
177#ifdef HAVE_LIBBFD_SUPPORT
178int dso__load_bfd_symbols(struct dso *dso, const char *debugfile);
179#endif
180
181int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
182 struct symsrc *runtime_ss, int kmodule);
183int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
184
185char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
186
187void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
188 bool kernel);
189void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
190void symbols__fixup_duplicate(struct rb_root_cached *symbols);
191void symbols__fixup_end(struct rb_root_cached *symbols, bool is_kallsyms);
192
193typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
194int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
195 bool *is_64_bit);
196
197#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
198
199struct kcore_extract {
200 char *kcore_filename;
201 u64 addr;
202 u64 offs;
203 u64 len;
204 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
205 int fd;
206};
207
208int kcore_extract__create(struct kcore_extract *kce);
209void kcore_extract__delete(struct kcore_extract *kce);
210
211int kcore_copy(const char *from_dir, const char *to_dir);
212int compare_proc_modules(const char *from, const char *to);
213
214int setup_list(struct strlist **list, const char *list_str,
215 const char *list_name);
216int setup_intlist(struct intlist **list, const char *list_str,
217 const char *list_name);
218
219#ifdef HAVE_LIBELF_SUPPORT
220bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
221void arch__sym_update(struct symbol *s, GElf_Sym *sym);
222#endif
223
224const char *arch__normalize_symbol_name(const char *name);
225#define SYMBOL_A 0
226#define SYMBOL_B 1
227
228int arch__compare_symbol_names(const char *namea, const char *nameb);
229int arch__compare_symbol_names_n(const char *namea, const char *nameb,
230 unsigned int n);
231int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
232
233enum symbol_tag_include {
234 SYMBOL_TAG_INCLUDE__NONE = 0,
235 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
236};
237
238int symbol__match_symbol_name(const char *namea, const char *nameb,
239 enum symbol_tag_include includes);
240
241/* structure containing an SDT note's info */
242struct sdt_note {
243 char *name; /* name of the note*/
244 char *provider; /* provider name */
245 char *args;
246 bool bit32; /* whether the location is 32 bits? */
247 union { /* location, base and semaphore addrs */
248 Elf64_Addr a64[3];
249 Elf32_Addr a32[3];
250 } addr;
251 struct list_head note_list; /* SDT notes' list */
252};
253
254int get_sdt_note_list(struct list_head *head, const char *target);
255int cleanup_sdt_note_list(struct list_head *sdt_notes);
256int sdt_notes__get_count(struct list_head *start);
257
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"
263#define NR_ADDR 3
264
265enum {
266 SDT_NOTE_IDX_LOC = 0,
267 SDT_NOTE_IDX_BASE,
268 SDT_NOTE_IDX_REFCTR,
269};
270
271struct mem_info *mem_info__new(void);
272struct mem_info *mem_info__get(struct mem_info *mi);
273void mem_info__put(struct mem_info *mi);
274
275static inline void __mem_info__zput(struct mem_info **mi)
276{
277 mem_info__put(*mi);
278 *mi = NULL;
279}
280
281#define mem_info__zput(mi) __mem_info__zput(&mi)
282
283int symbol__validate_sym_arguments(void);
284
285#endif /* __PERF_SYMBOL */
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#include "event.h"
16#include "util.h"
17
18#ifdef HAVE_LIBELF_SUPPORT
19#include <libelf.h>
20#include <gelf.h>
21#endif
22#include <elf.h>
23
24#include "dso.h"
25
26/*
27 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
28 * for newer versions we can use mmap to reduce memory usage:
29 */
30#ifdef HAVE_LIBELF_MMAP_SUPPORT
31# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
32#else
33# define PERF_ELF_C_READ_MMAP ELF_C_READ
34#endif
35
36#ifdef HAVE_LIBELF_SUPPORT
37Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
38 GElf_Shdr *shp, const char *name, size_t *idx);
39#endif
40
41#ifndef DMGL_PARAMS
42#define DMGL_NO_OPTS 0 /* For readability... */
43#define DMGL_PARAMS (1 << 0) /* Include function args */
44#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
45#endif
46
47/** struct symbol - symtab entry
48 *
49 * @ignore - resolvable but tools ignore it (e.g. idle routines)
50 */
51struct symbol {
52 struct rb_node rb_node;
53 u64 start;
54 u64 end;
55 u16 namelen;
56 u8 binding;
57 bool ignore;
58 char name[0];
59};
60
61void symbol__delete(struct symbol *sym);
62void symbols__delete(struct rb_root *symbols);
63
64/* symbols__for_each_entry - iterate over symbols (rb_root)
65 *
66 * @symbols: the rb_root of symbols
67 * @pos: the 'struct symbol *' to use as a loop cursor
68 * @nd: the 'struct rb_node *' to use as a temporary storage
69 */
70#define symbols__for_each_entry(symbols, pos, nd) \
71 for (nd = rb_first(symbols); \
72 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
73 nd = rb_next(nd))
74
75static inline size_t symbol__size(const struct symbol *sym)
76{
77 return sym->end - sym->start;
78}
79
80struct strlist;
81struct intlist;
82
83struct symbol_conf {
84 unsigned short priv_size;
85 unsigned short nr_events;
86 bool try_vmlinux_path,
87 force,
88 ignore_vmlinux,
89 ignore_vmlinux_buildid,
90 show_kernel_path,
91 use_modules,
92 allow_aliases,
93 sort_by_name,
94 show_nr_samples,
95 show_total_period,
96 use_callchain,
97 cumulate_callchain,
98 exclude_other,
99 show_cpu_utilization,
100 initialized,
101 kptr_restrict,
102 annotate_asm_raw,
103 annotate_src,
104 event_group,
105 demangle,
106 demangle_kernel,
107 filter_relative,
108 show_hist_headers,
109 branch_callstack,
110 has_filter,
111 show_ref_callgraph,
112 hide_unresolved,
113 raw_trace,
114 report_hierarchy;
115 const char *vmlinux_name,
116 *kallsyms_name,
117 *source_prefix,
118 *field_sep;
119 const char *default_guest_vmlinux_name,
120 *default_guest_kallsyms,
121 *default_guest_modules;
122 const char *guestmount;
123 const char *dso_list_str,
124 *comm_list_str,
125 *pid_list_str,
126 *tid_list_str,
127 *sym_list_str,
128 *col_width_list_str;
129 struct strlist *dso_list,
130 *comm_list,
131 *sym_list,
132 *dso_from_list,
133 *dso_to_list,
134 *sym_from_list,
135 *sym_to_list;
136 struct intlist *pid_list,
137 *tid_list;
138 const char *symfs;
139};
140
141extern struct symbol_conf symbol_conf;
142
143static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
144{
145 return path__join(bf, size, symbol_conf.symfs, path);
146}
147
148#define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
149
150extern int vmlinux_path__nr_entries;
151extern char **vmlinux_path;
152
153static inline void *symbol__priv(struct symbol *sym)
154{
155 return ((void *)sym) - symbol_conf.priv_size;
156}
157
158struct ref_reloc_sym {
159 const char *name;
160 u64 addr;
161 u64 unrelocated_addr;
162};
163
164struct map_symbol {
165 struct map *map;
166 struct symbol *sym;
167};
168
169struct addr_map_symbol {
170 struct map *map;
171 struct symbol *sym;
172 u64 addr;
173 u64 al_addr;
174};
175
176struct branch_info {
177 struct addr_map_symbol from;
178 struct addr_map_symbol to;
179 struct branch_flags flags;
180};
181
182struct mem_info {
183 struct addr_map_symbol iaddr;
184 struct addr_map_symbol daddr;
185 union perf_mem_data_src data_src;
186};
187
188struct addr_location {
189 struct machine *machine;
190 struct thread *thread;
191 struct map *map;
192 struct symbol *sym;
193 u64 addr;
194 char level;
195 u8 filtered;
196 u8 cpumode;
197 s32 cpu;
198 s32 socket;
199};
200
201struct symsrc {
202 char *name;
203 int fd;
204 enum dso_binary_type type;
205
206#ifdef HAVE_LIBELF_SUPPORT
207 Elf *elf;
208 GElf_Ehdr ehdr;
209
210 Elf_Scn *opdsec;
211 size_t opdidx;
212 GElf_Shdr opdshdr;
213
214 Elf_Scn *symtab;
215 GElf_Shdr symshdr;
216
217 Elf_Scn *dynsym;
218 size_t dynsym_idx;
219 GElf_Shdr dynshdr;
220
221 bool adjust_symbols;
222 bool is_64_bit;
223#endif
224};
225
226void symsrc__destroy(struct symsrc *ss);
227int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
228 enum dso_binary_type type);
229bool symsrc__has_symtab(struct symsrc *ss);
230bool symsrc__possibly_runtime(struct symsrc *ss);
231
232int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
233int dso__load_vmlinux(struct dso *dso, struct map *map,
234 const char *vmlinux, bool vmlinux_allocated,
235 symbol_filter_t filter);
236int dso__load_vmlinux_path(struct dso *dso, struct map *map,
237 symbol_filter_t filter);
238int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
239 symbol_filter_t filter);
240
241struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
242 u64 addr);
243struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
244 const char *name);
245struct symbol *symbol__next_by_name(struct symbol *sym);
246
247struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
248struct symbol *dso__next_symbol(struct symbol *sym);
249
250enum dso_type dso__type_fd(int fd);
251
252int filename__read_build_id(const char *filename, void *bf, size_t size);
253int sysfs__read_build_id(const char *filename, void *bf, size_t size);
254int modules__parse(const char *filename, void *arg,
255 int (*process_module)(void *arg, const char *name,
256 u64 start));
257int filename__read_debuglink(const char *filename, char *debuglink,
258 size_t size);
259
260struct perf_env;
261int symbol__init(struct perf_env *env);
262void symbol__exit(void);
263void symbol__elf_init(void);
264struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
265size_t symbol__fprintf_symname_offs(const struct symbol *sym,
266 const struct addr_location *al, FILE *fp);
267size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
268size_t symbol__fprintf(struct symbol *sym, FILE *fp);
269bool symbol_type__is_a(char symbol_type, enum map_type map_type);
270bool symbol__restricted_filename(const char *filename,
271 const char *restricted_filename);
272bool symbol__is_idle(struct symbol *sym);
273
274int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
275 struct symsrc *runtime_ss, symbol_filter_t filter,
276 int kmodule);
277int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
278 struct map *map, symbol_filter_t filter);
279
280void symbols__insert(struct rb_root *symbols, struct symbol *sym);
281void symbols__fixup_duplicate(struct rb_root *symbols);
282void symbols__fixup_end(struct rb_root *symbols);
283void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
284
285typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
286int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
287 bool *is_64_bit);
288
289#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
290
291struct kcore_extract {
292 char *kcore_filename;
293 u64 addr;
294 u64 offs;
295 u64 len;
296 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
297 int fd;
298};
299
300int kcore_extract__create(struct kcore_extract *kce);
301void kcore_extract__delete(struct kcore_extract *kce);
302
303int kcore_copy(const char *from_dir, const char *to_dir);
304int compare_proc_modules(const char *from, const char *to);
305
306int setup_list(struct strlist **list, const char *list_str,
307 const char *list_name);
308int setup_intlist(struct intlist **list, const char *list_str,
309 const char *list_name);
310
311#ifdef HAVE_LIBELF_SUPPORT
312bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
313void arch__elf_sym_adjust(GElf_Sym *sym);
314#endif
315
316#define SYMBOL_A 0
317#define SYMBOL_B 1
318
319int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
320
321#endif /* __PERF_SYMBOL */