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Commit | Line | Data |
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5aab621b ACM |
1 | #define _GNU_SOURCE |
2 | #include <ctype.h> | |
3 | #include <dirent.h> | |
4 | #include <errno.h> | |
5 | #include <libgen.h> | |
6 | #include <stdlib.h> | |
7 | #include <stdio.h> | |
8 | #include <string.h> | |
9 | #include <sys/types.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/param.h> | |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
9486aa38 | 14 | #include <inttypes.h> |
b36f19d5 | 15 | #include "build-id.h" |
8a6c5b26 | 16 | #include "debug.h" |
a2928c42 | 17 | #include "symbol.h" |
5aab621b | 18 | #include "strlist.h" |
a2928c42 ACM |
19 | |
20 | #include <libelf.h> | |
21 | #include <gelf.h> | |
22 | #include <elf.h> | |
f1617b40 | 23 | #include <limits.h> |
439d473b | 24 | #include <sys/utsname.h> |
2cdbc46d | 25 | |
3b01a413 ACM |
26 | #ifndef KSYM_NAME_LEN |
27 | #define KSYM_NAME_LEN 128 | |
28 | #endif | |
29 | ||
c12e15e7 ACM |
30 | #ifndef NT_GNU_BUILD_ID |
31 | #define NT_GNU_BUILD_ID 3 | |
32 | #endif | |
33 | ||
aeafcbaf | 34 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id); |
21916c38 | 35 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); |
b0da954a | 36 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 37 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
aeafcbaf | 38 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 39 | symbol_filter_t filter); |
aeafcbaf | 40 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 41 | symbol_filter_t filter); |
cc612d81 ACM |
42 | static int vmlinux_path__nr_entries; |
43 | static char **vmlinux_path; | |
439d473b | 44 | |
75be6cf4 | 45 | struct symbol_conf symbol_conf = { |
d599db3f | 46 | .exclude_other = true, |
b32d133a ACM |
47 | .use_modules = true, |
48 | .try_vmlinux_path = true, | |
3e6a2a7f | 49 | .annotate_src = true, |
ec5761ea | 50 | .symfs = "", |
b32d133a ACM |
51 | }; |
52 | ||
aeafcbaf | 53 | int dso__name_len(const struct dso *dso) |
8a6c5b26 ACM |
54 | { |
55 | if (verbose) | |
aeafcbaf | 56 | return dso->long_name_len; |
8a6c5b26 | 57 | |
aeafcbaf | 58 | return dso->short_name_len; |
8a6c5b26 ACM |
59 | } |
60 | ||
aeafcbaf | 61 | bool dso__loaded(const struct dso *dso, enum map_type type) |
3610583c | 62 | { |
aeafcbaf | 63 | return dso->loaded & (1 << type); |
3610583c ACM |
64 | } |
65 | ||
aeafcbaf | 66 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) |
79406cd7 | 67 | { |
aeafcbaf | 68 | return dso->sorted_by_name & (1 << type); |
79406cd7 ACM |
69 | } |
70 | ||
aeafcbaf | 71 | static void dso__set_sorted_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 72 | { |
aeafcbaf | 73 | dso->sorted_by_name |= (1 << type); |
79406cd7 ACM |
74 | } |
75 | ||
36a3e646 | 76 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 77 | { |
31877908 AB |
78 | symbol_type = toupper(symbol_type); |
79 | ||
6893d4ee ACM |
80 | switch (map_type) { |
81 | case MAP__FUNCTION: | |
82 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 83 | case MAP__VARIABLE: |
31877908 | 84 | return symbol_type == 'D'; |
6893d4ee ACM |
85 | default: |
86 | return false; | |
87 | } | |
88 | } | |
89 | ||
694bf407 AB |
90 | static int prefix_underscores_count(const char *str) |
91 | { | |
92 | const char *tail = str; | |
93 | ||
94 | while (*tail == '_') | |
95 | tail++; | |
96 | ||
97 | return tail - str; | |
98 | } | |
99 | ||
100 | #define SYMBOL_A 0 | |
101 | #define SYMBOL_B 1 | |
102 | ||
103 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
104 | { | |
105 | s64 a; | |
106 | s64 b; | |
107 | ||
108 | /* Prefer a symbol with non zero length */ | |
109 | a = syma->end - syma->start; | |
110 | b = symb->end - symb->start; | |
111 | if ((b == 0) && (a > 0)) | |
112 | return SYMBOL_A; | |
113 | else if ((a == 0) && (b > 0)) | |
114 | return SYMBOL_B; | |
115 | ||
116 | /* Prefer a non weak symbol over a weak one */ | |
117 | a = syma->binding == STB_WEAK; | |
118 | b = symb->binding == STB_WEAK; | |
119 | if (b && !a) | |
120 | return SYMBOL_A; | |
121 | if (a && !b) | |
122 | return SYMBOL_B; | |
123 | ||
124 | /* Prefer a global symbol over a non global one */ | |
125 | a = syma->binding == STB_GLOBAL; | |
126 | b = symb->binding == STB_GLOBAL; | |
127 | if (a && !b) | |
128 | return SYMBOL_A; | |
129 | if (b && !a) | |
130 | return SYMBOL_B; | |
131 | ||
132 | /* Prefer a symbol with less underscores */ | |
133 | a = prefix_underscores_count(syma->name); | |
134 | b = prefix_underscores_count(symb->name); | |
135 | if (b > a) | |
136 | return SYMBOL_A; | |
137 | else if (a > b) | |
138 | return SYMBOL_B; | |
139 | ||
140 | /* If all else fails, choose the symbol with the longest name */ | |
141 | if (strlen(syma->name) >= strlen(symb->name)) | |
142 | return SYMBOL_A; | |
143 | else | |
144 | return SYMBOL_B; | |
145 | } | |
146 | ||
147 | static void symbols__fixup_duplicate(struct rb_root *symbols) | |
148 | { | |
149 | struct rb_node *nd; | |
150 | struct symbol *curr, *next; | |
151 | ||
152 | nd = rb_first(symbols); | |
153 | ||
154 | while (nd) { | |
155 | curr = rb_entry(nd, struct symbol, rb_node); | |
156 | again: | |
157 | nd = rb_next(&curr->rb_node); | |
158 | next = rb_entry(nd, struct symbol, rb_node); | |
159 | ||
160 | if (!nd) | |
161 | break; | |
162 | ||
163 | if (curr->start != next->start) | |
164 | continue; | |
165 | ||
166 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
167 | rb_erase(&next->rb_node, symbols); | |
168 | goto again; | |
169 | } else { | |
170 | nd = rb_next(&curr->rb_node); | |
171 | rb_erase(&curr->rb_node, symbols); | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
aeafcbaf | 176 | static void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 177 | { |
aeafcbaf | 178 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 179 | struct symbol *curr, *prev; |
af427bf5 ACM |
180 | |
181 | if (prevnd == NULL) | |
182 | return; | |
183 | ||
2e538c4a ACM |
184 | curr = rb_entry(prevnd, struct symbol, rb_node); |
185 | ||
af427bf5 | 186 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
187 | prev = curr; |
188 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 189 | |
3b01a413 | 190 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 191 | prev->end = curr->start - 1; |
af427bf5 | 192 | } |
2e538c4a ACM |
193 | |
194 | /* Last entry */ | |
195 | if (curr->end == curr->start) | |
196 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
197 | } |
198 | ||
aeafcbaf | 199 | static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
200 | { |
201 | struct map *prev, *curr; | |
aeafcbaf | 202 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
203 | |
204 | if (prevnd == NULL) | |
205 | return; | |
206 | ||
207 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
208 | |
209 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
210 | prev = curr; | |
211 | curr = rb_entry(nd, struct map, rb_node); | |
212 | prev->end = curr->start - 1; | |
2e538c4a | 213 | } |
90c83218 ACM |
214 | |
215 | /* | |
216 | * We still haven't the actual symbols, so guess the | |
217 | * last map final address. | |
218 | */ | |
9d1faba5 | 219 | curr->end = ~0ULL; |
af427bf5 ACM |
220 | } |
221 | ||
aeafcbaf | 222 | static void map_groups__fixup_end(struct map_groups *mg) |
23ea4a3f ACM |
223 | { |
224 | int i; | |
225 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf | 226 | __map_groups__fixup_end(mg, i); |
23ea4a3f ACM |
227 | } |
228 | ||
c408fedf ACM |
229 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
230 | const char *name) | |
a2928c42 | 231 | { |
0085c954 | 232 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
233 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
234 | sizeof(*sym) + namelen)); | |
235 | if (sym == NULL) | |
0b73da3f IM |
236 | return NULL; |
237 | ||
75be6cf4 | 238 | if (symbol_conf.priv_size) |
aeafcbaf | 239 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 240 | |
aeafcbaf ACM |
241 | sym->start = start; |
242 | sym->end = len ? start + len - 1 : start; | |
243 | sym->binding = binding; | |
244 | sym->namelen = namelen - 1; | |
e4204992 | 245 | |
aeafcbaf ACM |
246 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
247 | __func__, name, start, sym->end); | |
248 | memcpy(sym->name, name, namelen); | |
a2928c42 | 249 | |
aeafcbaf | 250 | return sym; |
a2928c42 ACM |
251 | } |
252 | ||
aeafcbaf | 253 | void symbol__delete(struct symbol *sym) |
a2928c42 | 254 | { |
aeafcbaf | 255 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
256 | } |
257 | ||
aeafcbaf | 258 | static size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 259 | { |
9486aa38 | 260 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
261 | sym->start, sym->end, |
262 | sym->binding == STB_GLOBAL ? 'g' : | |
263 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
264 | sym->name); | |
a2928c42 ACM |
265 | } |
266 | ||
aeafcbaf | 267 | void dso__set_long_name(struct dso *dso, char *name) |
cfc10d3b | 268 | { |
ef6ae724 ACM |
269 | if (name == NULL) |
270 | return; | |
aeafcbaf ACM |
271 | dso->long_name = name; |
272 | dso->long_name_len = strlen(name); | |
cfc10d3b ACM |
273 | } |
274 | ||
aeafcbaf | 275 | static void dso__set_short_name(struct dso *dso, const char *name) |
b63be8d7 ACM |
276 | { |
277 | if (name == NULL) | |
278 | return; | |
aeafcbaf ACM |
279 | dso->short_name = name; |
280 | dso->short_name_len = strlen(name); | |
b63be8d7 ACM |
281 | } |
282 | ||
aeafcbaf | 283 | static void dso__set_basename(struct dso *dso) |
cfc10d3b | 284 | { |
aeafcbaf | 285 | dso__set_short_name(dso, basename(dso->long_name)); |
cfc10d3b ACM |
286 | } |
287 | ||
00a192b3 | 288 | struct dso *dso__new(const char *name) |
a2928c42 | 289 | { |
aeafcbaf | 290 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
a2928c42 | 291 | |
aeafcbaf | 292 | if (dso != NULL) { |
6a4694a4 | 293 | int i; |
aeafcbaf ACM |
294 | strcpy(dso->name, name); |
295 | dso__set_long_name(dso, dso->name); | |
296 | dso__set_short_name(dso, dso->name); | |
6a4694a4 | 297 | for (i = 0; i < MAP__NR_TYPES; ++i) |
aeafcbaf ACM |
298 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; |
299 | dso->symtab_type = SYMTAB__NOT_FOUND; | |
300 | dso->loaded = 0; | |
301 | dso->sorted_by_name = 0; | |
302 | dso->has_build_id = 0; | |
303 | dso->kernel = DSO_TYPE_USER; | |
304 | INIT_LIST_HEAD(&dso->node); | |
a2928c42 ACM |
305 | } |
306 | ||
aeafcbaf | 307 | return dso; |
a2928c42 ACM |
308 | } |
309 | ||
aeafcbaf | 310 | static void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
311 | { |
312 | struct symbol *pos; | |
aeafcbaf | 313 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
314 | |
315 | while (next) { | |
316 | pos = rb_entry(next, struct symbol, rb_node); | |
317 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 318 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 319 | symbol__delete(pos); |
a2928c42 ACM |
320 | } |
321 | } | |
322 | ||
aeafcbaf | 323 | void dso__delete(struct dso *dso) |
a2928c42 | 324 | { |
6a4694a4 ACM |
325 | int i; |
326 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf ACM |
327 | symbols__delete(&dso->symbols[i]); |
328 | if (dso->sname_alloc) | |
329 | free((char *)dso->short_name); | |
330 | if (dso->lname_alloc) | |
331 | free(dso->long_name); | |
332 | free(dso); | |
a2928c42 ACM |
333 | } |
334 | ||
aeafcbaf | 335 | void dso__set_build_id(struct dso *dso, void *build_id) |
8d06367f | 336 | { |
aeafcbaf ACM |
337 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); |
338 | dso->has_build_id = 1; | |
8d06367f ACM |
339 | } |
340 | ||
aeafcbaf | 341 | static void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 342 | { |
aeafcbaf | 343 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 344 | struct rb_node *parent = NULL; |
9cffa8d5 | 345 | const u64 ip = sym->start; |
a2928c42 ACM |
346 | struct symbol *s; |
347 | ||
348 | while (*p != NULL) { | |
349 | parent = *p; | |
350 | s = rb_entry(parent, struct symbol, rb_node); | |
351 | if (ip < s->start) | |
352 | p = &(*p)->rb_left; | |
353 | else | |
354 | p = &(*p)->rb_right; | |
355 | } | |
356 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 357 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
358 | } |
359 | ||
aeafcbaf | 360 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
361 | { |
362 | struct rb_node *n; | |
363 | ||
aeafcbaf | 364 | if (symbols == NULL) |
a2928c42 ACM |
365 | return NULL; |
366 | ||
aeafcbaf | 367 | n = symbols->rb_node; |
a2928c42 ACM |
368 | |
369 | while (n) { | |
370 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
371 | ||
372 | if (ip < s->start) | |
373 | n = n->rb_left; | |
374 | else if (ip > s->end) | |
375 | n = n->rb_right; | |
376 | else | |
377 | return s; | |
378 | } | |
379 | ||
380 | return NULL; | |
381 | } | |
382 | ||
79406cd7 ACM |
383 | struct symbol_name_rb_node { |
384 | struct rb_node rb_node; | |
385 | struct symbol sym; | |
386 | }; | |
387 | ||
aeafcbaf | 388 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 389 | { |
aeafcbaf | 390 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 391 | struct rb_node *parent = NULL; |
02a9d037 RV |
392 | struct symbol_name_rb_node *symn, *s; |
393 | ||
394 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
395 | |
396 | while (*p != NULL) { | |
397 | parent = *p; | |
398 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
399 | if (strcmp(sym->name, s->sym.name) < 0) | |
400 | p = &(*p)->rb_left; | |
401 | else | |
402 | p = &(*p)->rb_right; | |
403 | } | |
404 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 405 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
406 | } |
407 | ||
aeafcbaf ACM |
408 | static void symbols__sort_by_name(struct rb_root *symbols, |
409 | struct rb_root *source) | |
79406cd7 ACM |
410 | { |
411 | struct rb_node *nd; | |
412 | ||
413 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
414 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 415 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
416 | } |
417 | } | |
418 | ||
aeafcbaf ACM |
419 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
420 | const char *name) | |
79406cd7 ACM |
421 | { |
422 | struct rb_node *n; | |
423 | ||
aeafcbaf | 424 | if (symbols == NULL) |
79406cd7 ACM |
425 | return NULL; |
426 | ||
aeafcbaf | 427 | n = symbols->rb_node; |
79406cd7 ACM |
428 | |
429 | while (n) { | |
430 | struct symbol_name_rb_node *s; | |
431 | int cmp; | |
432 | ||
433 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
434 | cmp = strcmp(name, s->sym.name); | |
435 | ||
436 | if (cmp < 0) | |
437 | n = n->rb_left; | |
438 | else if (cmp > 0) | |
439 | n = n->rb_right; | |
440 | else | |
441 | return &s->sym; | |
442 | } | |
443 | ||
444 | return NULL; | |
445 | } | |
446 | ||
aeafcbaf | 447 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 448 | enum map_type type, u64 addr) |
fcf1203a | 449 | { |
aeafcbaf | 450 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
451 | } |
452 | ||
aeafcbaf | 453 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
454 | const char *name) |
455 | { | |
aeafcbaf | 456 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
457 | } |
458 | ||
aeafcbaf | 459 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 460 | { |
aeafcbaf ACM |
461 | dso__set_sorted_by_name(dso, type); |
462 | return symbols__sort_by_name(&dso->symbol_names[type], | |
463 | &dso->symbols[type]); | |
79406cd7 ACM |
464 | } |
465 | ||
aeafcbaf | 466 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
a2928c42 | 467 | { |
8d06367f | 468 | char *bid = bf; |
aeafcbaf | 469 | const u8 *raw = build_id; |
8d06367f | 470 | int i; |
a2928c42 | 471 | |
8d06367f ACM |
472 | for (i = 0; i < len; ++i) { |
473 | sprintf(bid, "%02x", *raw); | |
474 | ++raw; | |
475 | bid += 2; | |
476 | } | |
477 | ||
aeafcbaf | 478 | return raw - build_id; |
8d06367f ACM |
479 | } |
480 | ||
aeafcbaf | 481 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
8d06367f ACM |
482 | { |
483 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f | 484 | |
aeafcbaf | 485 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
9e03eb2d ACM |
486 | return fprintf(fp, "%s", sbuild_id); |
487 | } | |
488 | ||
aeafcbaf ACM |
489 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
490 | enum map_type type, FILE *fp) | |
90f18e63 SD |
491 | { |
492 | size_t ret = 0; | |
493 | struct rb_node *nd; | |
494 | struct symbol_name_rb_node *pos; | |
495 | ||
aeafcbaf | 496 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
497 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
498 | fprintf(fp, "%s\n", pos->sym.name); | |
499 | } | |
500 | ||
501 | return ret; | |
502 | } | |
503 | ||
aeafcbaf | 504 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) |
9e03eb2d ACM |
505 | { |
506 | struct rb_node *nd; | |
aeafcbaf | 507 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); |
9e03eb2d | 508 | |
aeafcbaf ACM |
509 | if (dso->short_name != dso->long_name) |
510 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3846df2e | 511 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], |
aeafcbaf ACM |
512 | dso->loaded ? "" : "NOT "); |
513 | ret += dso__fprintf_buildid(dso, fp); | |
6a4694a4 | 514 | ret += fprintf(fp, ")\n"); |
aeafcbaf | 515 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { |
95011c60 ACM |
516 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
517 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
518 | } |
519 | ||
520 | return ret; | |
521 | } | |
522 | ||
9e201442 ACM |
523 | int kallsyms__parse(const char *filename, void *arg, |
524 | int (*process_symbol)(void *arg, const char *name, | |
3b01a413 | 525 | char type, u64 start, u64 end)) |
a2928c42 | 526 | { |
a2928c42 ACM |
527 | char *line = NULL; |
528 | size_t n; | |
3b01a413 | 529 | int err = -1; |
9e201442 | 530 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
531 | |
532 | if (file == NULL) | |
533 | goto out_failure; | |
534 | ||
3b01a413 ACM |
535 | err = 0; |
536 | ||
a2928c42 | 537 | while (!feof(file)) { |
9cffa8d5 | 538 | u64 start; |
a2928c42 ACM |
539 | int line_len, len; |
540 | char symbol_type; | |
2e538c4a | 541 | char *symbol_name; |
a2928c42 ACM |
542 | |
543 | line_len = getline(&line, &n, file); | |
a1645ce1 | 544 | if (line_len < 0 || !line) |
a2928c42 ACM |
545 | break; |
546 | ||
a2928c42 ACM |
547 | line[--line_len] = '\0'; /* \n */ |
548 | ||
a0055ae2 | 549 | len = hex2u64(line, &start); |
a2928c42 ACM |
550 | |
551 | len++; | |
552 | if (len + 2 >= line_len) | |
553 | continue; | |
554 | ||
31877908 | 555 | symbol_type = line[len]; |
3b01a413 ACM |
556 | len += 2; |
557 | symbol_name = line + len; | |
558 | len = line_len - len; | |
682b335a | 559 | |
3b01a413 ACM |
560 | if (len >= KSYM_NAME_LEN) { |
561 | err = -1; | |
682b335a | 562 | break; |
3b01a413 ACM |
563 | } |
564 | ||
3f5a4272 AB |
565 | /* |
566 | * module symbols are not sorted so we add all | |
567 | * symbols with zero length and rely on | |
568 | * symbols__fixup_end() to fix it up. | |
569 | */ | |
570 | err = process_symbol(arg, symbol_name, | |
571 | symbol_type, start, start); | |
572 | if (err) | |
573 | break; | |
2e538c4a ACM |
574 | } |
575 | ||
576 | free(line); | |
577 | fclose(file); | |
682b335a | 578 | return err; |
2e538c4a | 579 | |
2e538c4a ACM |
580 | out_failure: |
581 | return -1; | |
582 | } | |
583 | ||
682b335a ACM |
584 | struct process_kallsyms_args { |
585 | struct map *map; | |
586 | struct dso *dso; | |
587 | }; | |
588 | ||
c408fedf ACM |
589 | static u8 kallsyms2elf_type(char type) |
590 | { | |
591 | if (type == 'W') | |
592 | return STB_WEAK; | |
593 | ||
594 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
595 | } | |
596 | ||
682b335a | 597 | static int map__process_kallsym_symbol(void *arg, const char *name, |
3b01a413 | 598 | char type, u64 start, u64 end) |
682b335a ACM |
599 | { |
600 | struct symbol *sym; | |
601 | struct process_kallsyms_args *a = arg; | |
602 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
603 | ||
604 | if (!symbol_type__is_a(type, a->map->type)) | |
605 | return 0; | |
606 | ||
3b01a413 ACM |
607 | sym = symbol__new(start, end - start + 1, |
608 | kallsyms2elf_type(type), name); | |
682b335a ACM |
609 | if (sym == NULL) |
610 | return -ENOMEM; | |
611 | /* | |
612 | * We will pass the symbols to the filter later, in | |
613 | * map__split_kallsyms, when we have split the maps per module | |
614 | */ | |
615 | symbols__insert(root, sym); | |
a1645ce1 | 616 | |
682b335a ACM |
617 | return 0; |
618 | } | |
619 | ||
620 | /* | |
621 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
622 | * so that we can in the next step set the symbol ->end address and then | |
623 | * call kernel_maps__split_kallsyms. | |
624 | */ | |
aeafcbaf | 625 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 626 | struct map *map) |
682b335a | 627 | { |
aeafcbaf | 628 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 629 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
630 | } |
631 | ||
2e538c4a ACM |
632 | /* |
633 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
634 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
635 | * the original ELF section names vmlinux have. | |
636 | */ | |
aeafcbaf | 637 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 638 | symbol_filter_t filter) |
2e538c4a | 639 | { |
9de89fe7 | 640 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 641 | struct machine *machine = kmaps->machine; |
4e06255f | 642 | struct map *curr_map = map; |
2e538c4a | 643 | struct symbol *pos; |
8a953312 | 644 | int count = 0, moved = 0; |
aeafcbaf | 645 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 646 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
647 | int kernel_range = 0; |
648 | ||
649 | while (next) { | |
650 | char *module; | |
651 | ||
652 | pos = rb_entry(next, struct symbol, rb_node); | |
653 | next = rb_next(&pos->rb_node); | |
654 | ||
655 | module = strchr(pos->name, '\t'); | |
656 | if (module) { | |
75be6cf4 | 657 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
658 | goto discard_symbol; |
659 | ||
2e538c4a ACM |
660 | *module++ = '\0'; |
661 | ||
b7cece76 | 662 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 663 | if (curr_map != map && |
aeafcbaf | 664 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 665 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
666 | /* |
667 | * We assume all symbols of a module are | |
668 | * continuous in * kallsyms, so curr_map | |
669 | * points to a module and all its | |
670 | * symbols are in its kmap. Mark it as | |
671 | * loaded. | |
672 | */ | |
673 | dso__set_loaded(curr_map->dso, | |
674 | curr_map->type); | |
675 | } | |
676 | ||
677 | curr_map = map_groups__find_by_name(kmaps, | |
678 | map->type, module); | |
4e06255f | 679 | if (curr_map == NULL) { |
2f51903b | 680 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 681 | "inconsistency while looking " |
a1645ce1 | 682 | "for \"%s\" module!\n", |
23346f21 | 683 | machine->root_dir, module); |
a1645ce1 ZY |
684 | curr_map = map; |
685 | goto discard_symbol; | |
af427bf5 | 686 | } |
b7cece76 | 687 | |
a1645ce1 | 688 | if (curr_map->dso->loaded && |
23346f21 | 689 | !machine__is_default_guest(machine)) |
b7cece76 | 690 | goto discard_symbol; |
af427bf5 | 691 | } |
2e538c4a ACM |
692 | /* |
693 | * So that we look just like we get from .ko files, | |
694 | * i.e. not prelinked, relative to map->start. | |
695 | */ | |
4e06255f ACM |
696 | pos->start = curr_map->map_ip(curr_map, pos->start); |
697 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
698 | } else if (curr_map != map) { | |
2e538c4a | 699 | char dso_name[PATH_MAX]; |
aeafcbaf | 700 | struct dso *ndso; |
2e538c4a | 701 | |
8a953312 ACM |
702 | if (count == 0) { |
703 | curr_map = map; | |
704 | goto filter_symbol; | |
705 | } | |
706 | ||
aeafcbaf | 707 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
708 | snprintf(dso_name, sizeof(dso_name), |
709 | "[guest.kernel].%d", | |
710 | kernel_range++); | |
711 | else | |
712 | snprintf(dso_name, sizeof(dso_name), | |
713 | "[kernel].%d", | |
714 | kernel_range++); | |
2e538c4a | 715 | |
aeafcbaf ACM |
716 | ndso = dso__new(dso_name); |
717 | if (ndso == NULL) | |
2e538c4a ACM |
718 | return -1; |
719 | ||
aeafcbaf | 720 | ndso->kernel = dso->kernel; |
a1645ce1 | 721 | |
aeafcbaf | 722 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 723 | if (curr_map == NULL) { |
aeafcbaf | 724 | dso__delete(ndso); |
2e538c4a ACM |
725 | return -1; |
726 | } | |
a2928c42 | 727 | |
4e06255f | 728 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 729 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
730 | ++kernel_range; |
731 | } | |
8a953312 | 732 | filter_symbol: |
4e06255f | 733 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 734 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 735 | symbol__delete(pos); |
2e538c4a | 736 | } else { |
4e06255f ACM |
737 | if (curr_map != map) { |
738 | rb_erase(&pos->rb_node, root); | |
739 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
740 | ++moved; |
741 | } else | |
742 | ++count; | |
9974f496 | 743 | } |
a2928c42 ACM |
744 | } |
745 | ||
a1645ce1 | 746 | if (curr_map != map && |
aeafcbaf | 747 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 748 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
749 | dso__set_loaded(curr_map->dso, curr_map->type); |
750 | } | |
751 | ||
8a953312 | 752 | return count + moved; |
2e538c4a | 753 | } |
a2928c42 | 754 | |
ec80fde7 ACM |
755 | static bool symbol__restricted_filename(const char *filename, |
756 | const char *restricted_filename) | |
757 | { | |
758 | bool restricted = false; | |
759 | ||
760 | if (symbol_conf.kptr_restrict) { | |
761 | char *r = realpath(filename, NULL); | |
762 | ||
763 | if (r != NULL) { | |
764 | restricted = strcmp(r, restricted_filename) == 0; | |
765 | free(r); | |
766 | return restricted; | |
767 | } | |
768 | } | |
769 | ||
770 | return restricted; | |
771 | } | |
772 | ||
aeafcbaf | 773 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 774 | struct map *map, symbol_filter_t filter) |
2e538c4a | 775 | { |
ec80fde7 ACM |
776 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
777 | return -1; | |
778 | ||
aeafcbaf | 779 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
780 | return -1; |
781 | ||
694bf407 | 782 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
783 | symbols__fixup_end(&dso->symbols[map->type]); |
784 | ||
aeafcbaf ACM |
785 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
786 | dso->symtab_type = SYMTAB__GUEST_KALLSYMS; | |
a1645ce1 | 787 | else |
aeafcbaf | 788 | dso->symtab_type = SYMTAB__KALLSYMS; |
2e538c4a | 789 | |
aeafcbaf | 790 | return dso__split_kallsyms(dso, map, filter); |
af427bf5 ACM |
791 | } |
792 | ||
aeafcbaf | 793 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 794 | symbol_filter_t filter) |
80d496be PE |
795 | { |
796 | char *line = NULL; | |
797 | size_t n; | |
798 | FILE *file; | |
799 | int nr_syms = 0; | |
800 | ||
aeafcbaf | 801 | file = fopen(dso->long_name, "r"); |
80d496be PE |
802 | if (file == NULL) |
803 | goto out_failure; | |
804 | ||
805 | while (!feof(file)) { | |
9cffa8d5 | 806 | u64 start, size; |
80d496be PE |
807 | struct symbol *sym; |
808 | int line_len, len; | |
809 | ||
810 | line_len = getline(&line, &n, file); | |
811 | if (line_len < 0) | |
812 | break; | |
813 | ||
814 | if (!line) | |
815 | goto out_failure; | |
816 | ||
817 | line[--line_len] = '\0'; /* \n */ | |
818 | ||
819 | len = hex2u64(line, &start); | |
820 | ||
821 | len++; | |
822 | if (len + 2 >= line_len) | |
823 | continue; | |
824 | ||
825 | len += hex2u64(line + len, &size); | |
826 | ||
827 | len++; | |
828 | if (len + 2 >= line_len) | |
829 | continue; | |
830 | ||
c408fedf | 831 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
832 | |
833 | if (sym == NULL) | |
834 | goto out_delete_line; | |
835 | ||
439d473b | 836 | if (filter && filter(map, sym)) |
00a192b3 | 837 | symbol__delete(sym); |
80d496be | 838 | else { |
aeafcbaf | 839 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
840 | nr_syms++; |
841 | } | |
842 | } | |
843 | ||
844 | free(line); | |
845 | fclose(file); | |
846 | ||
847 | return nr_syms; | |
848 | ||
849 | out_delete_line: | |
850 | free(line); | |
851 | out_failure: | |
852 | return -1; | |
853 | } | |
854 | ||
a2928c42 ACM |
855 | /** |
856 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
857 | * | |
aeafcbaf | 858 | * @syms: struct elf_symtab instance to iterate |
83a0944f | 859 | * @idx: uint32_t idx |
a2928c42 ACM |
860 | * @sym: GElf_Sym iterator |
861 | */ | |
83a0944f IM |
862 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
863 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
864 | idx < nr_syms; \ | |
865 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
866 | |
867 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
868 | { | |
869 | return GELF_ST_TYPE(sym->st_info); | |
870 | } | |
871 | ||
872 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
873 | { | |
874 | return elf_sym__type(sym) == STT_FUNC && | |
875 | sym->st_name != 0 && | |
81833130 | 876 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
877 | } |
878 | ||
f1dfa0b1 ACM |
879 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
880 | { | |
881 | return elf_sym__type(sym) == STT_OBJECT && | |
882 | sym->st_name != 0 && | |
883 | sym->st_shndx != SHN_UNDEF; | |
884 | } | |
885 | ||
6cfcc53e MG |
886 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
887 | { | |
888 | return elf_sym__type(sym) == STT_NOTYPE && | |
889 | sym->st_name != 0 && | |
890 | sym->st_shndx != SHN_UNDEF && | |
891 | sym->st_shndx != SHN_ABS; | |
892 | } | |
893 | ||
894 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
895 | const Elf_Data *secstrs) | |
896 | { | |
897 | return secstrs->d_buf + shdr->sh_name; | |
898 | } | |
899 | ||
900 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
901 | const Elf_Data *secstrs) | |
902 | { | |
903 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
904 | } | |
905 | ||
f1dfa0b1 ACM |
906 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
907 | const Elf_Data *secstrs) | |
908 | { | |
909 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
910 | } | |
911 | ||
a2928c42 ACM |
912 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
913 | const Elf_Data *symstrs) | |
914 | { | |
915 | return symstrs->d_buf + sym->st_name; | |
916 | } | |
917 | ||
918 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
919 | GElf_Shdr *shp, const char *name, | |
83a0944f | 920 | size_t *idx) |
a2928c42 ACM |
921 | { |
922 | Elf_Scn *sec = NULL; | |
923 | size_t cnt = 1; | |
924 | ||
925 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
926 | char *str; | |
927 | ||
928 | gelf_getshdr(sec, shp); | |
929 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
930 | if (!strcmp(name, str)) { | |
83a0944f IM |
931 | if (idx) |
932 | *idx = cnt; | |
a2928c42 ACM |
933 | break; |
934 | } | |
935 | ++cnt; | |
936 | } | |
937 | ||
938 | return sec; | |
939 | } | |
940 | ||
8ce998d6 ACM |
941 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
942 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
943 | idx < nr_entries; \ | |
944 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
945 | ||
946 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
947 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
948 | idx < nr_entries; \ | |
949 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
950 | ||
a25e46c4 ACM |
951 | /* |
952 | * We need to check if we have a .dynsym, so that we can handle the | |
953 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
954 | * .dynsym or .symtab). | |
955 | * And always look at the original dso, not at debuginfo packages, that | |
956 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
957 | */ | |
aeafcbaf | 958 | static int dso__synthesize_plt_symbols(struct dso *dso, struct map *map, |
82164161 | 959 | symbol_filter_t filter) |
8ce998d6 ACM |
960 | { |
961 | uint32_t nr_rel_entries, idx; | |
962 | GElf_Sym sym; | |
9cffa8d5 | 963 | u64 plt_offset; |
8ce998d6 ACM |
964 | GElf_Shdr shdr_plt; |
965 | struct symbol *f; | |
a25e46c4 | 966 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 967 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
968 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
969 | size_t dynsym_idx; | |
970 | GElf_Ehdr ehdr; | |
8ce998d6 | 971 | char sympltname[1024]; |
a25e46c4 ACM |
972 | Elf *elf; |
973 | int nr = 0, symidx, fd, err = 0; | |
ec5761ea | 974 | char name[PATH_MAX]; |
a25e46c4 | 975 | |
ec5761ea | 976 | snprintf(name, sizeof(name), "%s%s", |
aeafcbaf | 977 | symbol_conf.symfs, dso->long_name); |
ec5761ea | 978 | fd = open(name, O_RDONLY); |
a25e46c4 ACM |
979 | if (fd < 0) |
980 | goto out; | |
981 | ||
84087126 | 982 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
983 | if (elf == NULL) |
984 | goto out_close; | |
985 | ||
986 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
987 | goto out_elf_end; | |
988 | ||
989 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
990 | ".dynsym", &dynsym_idx); | |
991 | if (scn_dynsym == NULL) | |
992 | goto out_elf_end; | |
8ce998d6 | 993 | |
a25e46c4 | 994 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
995 | ".rela.plt", NULL); |
996 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 997 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
998 | ".rel.plt", NULL); |
999 | if (scn_plt_rel == NULL) | |
a25e46c4 | 1000 | goto out_elf_end; |
8ce998d6 ACM |
1001 | } |
1002 | ||
a25e46c4 ACM |
1003 | err = -1; |
1004 | ||
8ce998d6 | 1005 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 1006 | goto out_elf_end; |
8ce998d6 | 1007 | |
a25e46c4 ACM |
1008 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
1009 | goto out_elf_end; | |
8ce998d6 ACM |
1010 | |
1011 | /* | |
83a0944f | 1012 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
1013 | * and the symbols in the .dynsym they refer to. |
1014 | */ | |
1015 | reldata = elf_getdata(scn_plt_rel, NULL); | |
1016 | if (reldata == NULL) | |
a25e46c4 | 1017 | goto out_elf_end; |
8ce998d6 ACM |
1018 | |
1019 | syms = elf_getdata(scn_dynsym, NULL); | |
1020 | if (syms == NULL) | |
a25e46c4 | 1021 | goto out_elf_end; |
8ce998d6 | 1022 | |
a25e46c4 | 1023 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 1024 | if (scn_symstrs == NULL) |
a25e46c4 | 1025 | goto out_elf_end; |
8ce998d6 ACM |
1026 | |
1027 | symstrs = elf_getdata(scn_symstrs, NULL); | |
1028 | if (symstrs == NULL) | |
a25e46c4 | 1029 | goto out_elf_end; |
8ce998d6 ACM |
1030 | |
1031 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
1032 | plt_offset = shdr_plt.sh_offset; | |
1033 | ||
1034 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
1035 | GElf_Rela pos_mem, *pos; | |
1036 | ||
1037 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
1038 | nr_rel_entries) { | |
1039 | symidx = GELF_R_SYM(pos->r_info); | |
1040 | plt_offset += shdr_plt.sh_entsize; | |
1041 | gelf_getsym(syms, symidx, &sym); | |
1042 | snprintf(sympltname, sizeof(sympltname), | |
1043 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1044 | ||
1045 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1046 | STB_GLOBAL, sympltname); |
8ce998d6 | 1047 | if (!f) |
a25e46c4 | 1048 | goto out_elf_end; |
8ce998d6 | 1049 | |
82164161 ACM |
1050 | if (filter && filter(map, f)) |
1051 | symbol__delete(f); | |
1052 | else { | |
aeafcbaf | 1053 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1054 | ++nr; |
1055 | } | |
8ce998d6 ACM |
1056 | } |
1057 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
1058 | GElf_Rel pos_mem, *pos; | |
1059 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
1060 | nr_rel_entries) { | |
1061 | symidx = GELF_R_SYM(pos->r_info); | |
1062 | plt_offset += shdr_plt.sh_entsize; | |
1063 | gelf_getsym(syms, symidx, &sym); | |
1064 | snprintf(sympltname, sizeof(sympltname), | |
1065 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1066 | ||
1067 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1068 | STB_GLOBAL, sympltname); |
8ce998d6 | 1069 | if (!f) |
a25e46c4 | 1070 | goto out_elf_end; |
8ce998d6 | 1071 | |
82164161 ACM |
1072 | if (filter && filter(map, f)) |
1073 | symbol__delete(f); | |
1074 | else { | |
aeafcbaf | 1075 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1076 | ++nr; |
1077 | } | |
8ce998d6 | 1078 | } |
8ce998d6 ACM |
1079 | } |
1080 | ||
a25e46c4 ACM |
1081 | err = 0; |
1082 | out_elf_end: | |
1083 | elf_end(elf); | |
1084 | out_close: | |
1085 | close(fd); | |
1086 | ||
1087 | if (err == 0) | |
1088 | return nr; | |
1089 | out: | |
fe2197b8 | 1090 | pr_debug("%s: problems reading %s PLT info.\n", |
aeafcbaf | 1091 | __func__, dso->long_name); |
a25e46c4 | 1092 | return 0; |
8ce998d6 ACM |
1093 | } |
1094 | ||
aeafcbaf | 1095 | static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type) |
d45868d3 ACM |
1096 | { |
1097 | switch (type) { | |
1098 | case MAP__FUNCTION: | |
aeafcbaf | 1099 | return elf_sym__is_function(sym); |
f1dfa0b1 | 1100 | case MAP__VARIABLE: |
aeafcbaf | 1101 | return elf_sym__is_object(sym); |
d45868d3 ACM |
1102 | default: |
1103 | return false; | |
1104 | } | |
1105 | } | |
1106 | ||
aeafcbaf ACM |
1107 | static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs, |
1108 | enum map_type type) | |
d45868d3 ACM |
1109 | { |
1110 | switch (type) { | |
1111 | case MAP__FUNCTION: | |
aeafcbaf | 1112 | return elf_sec__is_text(shdr, secstrs); |
f1dfa0b1 | 1113 | case MAP__VARIABLE: |
aeafcbaf | 1114 | return elf_sec__is_data(shdr, secstrs); |
d45868d3 ACM |
1115 | default: |
1116 | return false; | |
1117 | } | |
1118 | } | |
1119 | ||
70c3856b EM |
1120 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
1121 | { | |
1122 | Elf_Scn *sec = NULL; | |
1123 | GElf_Shdr shdr; | |
1124 | size_t cnt = 1; | |
1125 | ||
1126 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
1127 | gelf_getshdr(sec, &shdr); | |
1128 | ||
1129 | if ((addr >= shdr.sh_addr) && | |
1130 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
1131 | return cnt; | |
1132 | ||
1133 | ++cnt; | |
1134 | } | |
1135 | ||
1136 | return -1; | |
1137 | } | |
1138 | ||
aeafcbaf | 1139 | static int dso__load_sym(struct dso *dso, struct map *map, const char *name, |
6da80ce8 DM |
1140 | int fd, symbol_filter_t filter, int kmodule, |
1141 | int want_symtab) | |
a2928c42 | 1142 | { |
aeafcbaf | 1143 | struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL; |
2e538c4a | 1144 | struct map *curr_map = map; |
aeafcbaf | 1145 | struct dso *curr_dso = dso; |
6cfcc53e | 1146 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1147 | uint32_t nr_syms; |
1148 | int err = -1; | |
83a0944f | 1149 | uint32_t idx; |
a2928c42 | 1150 | GElf_Ehdr ehdr; |
70c3856b EM |
1151 | GElf_Shdr shdr, opdshdr; |
1152 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1153 | GElf_Sym sym; |
70c3856b | 1154 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1155 | Elf *elf; |
439d473b | 1156 | int nr = 0; |
70c3856b | 1157 | size_t opdidx = 0; |
a2928c42 | 1158 | |
84087126 | 1159 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1160 | if (elf == NULL) { |
8b1389ef | 1161 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1162 | goto out_close; |
1163 | } | |
1164 | ||
1165 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1166 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1167 | goto out_elf_end; |
1168 | } | |
1169 | ||
6da80ce8 | 1170 | /* Always reject images with a mismatched build-id: */ |
aeafcbaf | 1171 | if (dso->has_build_id) { |
21916c38 DM |
1172 | u8 build_id[BUILD_ID_SIZE]; |
1173 | ||
be96ea8f | 1174 | if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0) |
21916c38 DM |
1175 | goto out_elf_end; |
1176 | ||
aeafcbaf | 1177 | if (!dso__build_id_equal(dso, build_id)) |
21916c38 DM |
1178 | goto out_elf_end; |
1179 | } | |
1180 | ||
a2928c42 | 1181 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1182 | if (sec == NULL) { |
6da80ce8 DM |
1183 | if (want_symtab) |
1184 | goto out_elf_end; | |
1185 | ||
a25e46c4 ACM |
1186 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1187 | if (sec == NULL) | |
8ce998d6 | 1188 | goto out_elf_end; |
8ce998d6 | 1189 | } |
a2928c42 | 1190 | |
70c3856b | 1191 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
adb09184 AB |
1192 | if (opdshdr.sh_type != SHT_PROGBITS) |
1193 | opdsec = NULL; | |
70c3856b EM |
1194 | if (opdsec) |
1195 | opddata = elf_rawdata(opdsec, NULL); | |
1196 | ||
a2928c42 ACM |
1197 | syms = elf_getdata(sec, NULL); |
1198 | if (syms == NULL) | |
1199 | goto out_elf_end; | |
1200 | ||
1201 | sec = elf_getscn(elf, shdr.sh_link); | |
1202 | if (sec == NULL) | |
1203 | goto out_elf_end; | |
1204 | ||
1205 | symstrs = elf_getdata(sec, NULL); | |
1206 | if (symstrs == NULL) | |
1207 | goto out_elf_end; | |
1208 | ||
6cfcc53e MG |
1209 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1210 | if (sec_strndx == NULL) | |
1211 | goto out_elf_end; | |
1212 | ||
1213 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1214 | if (secstrs == NULL) |
6cfcc53e MG |
1215 | goto out_elf_end; |
1216 | ||
a2928c42 ACM |
1217 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1218 | ||
e9fbc9dc | 1219 | memset(&sym, 0, sizeof(sym)); |
aeafcbaf ACM |
1220 | if (dso->kernel == DSO_TYPE_USER) { |
1221 | dso->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
1222 | elf_section_by_name(elf, &ehdr, &shdr, |
1223 | ".gnu.prelink_undo", | |
1224 | NULL) != NULL); | |
aeafcbaf ACM |
1225 | } else { |
1226 | dso->adjust_symbols = 0; | |
1227 | } | |
83a0944f | 1228 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1229 | struct symbol *f; |
56b03f3c | 1230 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1231 | char *demangled = NULL; |
6cfcc53e MG |
1232 | int is_label = elf_sym__is_label(&sym); |
1233 | const char *section_name; | |
a2928c42 | 1234 | |
9de89fe7 ACM |
1235 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1236 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1237 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1238 | |
d45868d3 | 1239 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1240 | continue; |
1241 | ||
696b97a5 DM |
1242 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1243 | * don't identify functions, so will confuse the profile | |
1244 | * output: */ | |
1245 | if (ehdr.e_machine == EM_ARM) { | |
1246 | if (!strcmp(elf_name, "$a") || | |
1247 | !strcmp(elf_name, "$d") || | |
1248 | !strcmp(elf_name, "$t")) | |
1249 | continue; | |
1250 | } | |
1251 | ||
70c3856b EM |
1252 | if (opdsec && sym.st_shndx == opdidx) { |
1253 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1254 | u64 *opd = opddata->d_buf + offset; | |
1255 | sym.st_value = *opd; | |
1256 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1257 | } | |
1258 | ||
a2928c42 ACM |
1259 | sec = elf_getscn(elf, sym.st_shndx); |
1260 | if (!sec) | |
1261 | goto out_elf_end; | |
1262 | ||
1263 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1264 | |
d45868d3 | 1265 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1266 | continue; |
1267 | ||
1268 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1269 | |
b2f8fb23 DDAG |
1270 | /* On ARM, symbols for thumb functions have 1 added to |
1271 | * the symbol address as a flag - remove it */ | |
1272 | if ((ehdr.e_machine == EM_ARM) && | |
1273 | (map->type == MAP__FUNCTION) && | |
1274 | (sym.st_value & 1)) | |
1275 | --sym.st_value; | |
1276 | ||
aeafcbaf | 1277 | if (dso->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1278 | char dso_name[PATH_MAX]; |
1279 | ||
1280 | if (strcmp(section_name, | |
b63be8d7 | 1281 | (curr_dso->short_name + |
aeafcbaf | 1282 | dso->short_name_len)) == 0) |
2e538c4a ACM |
1283 | goto new_symbol; |
1284 | ||
1285 | if (strcmp(section_name, ".text") == 0) { | |
1286 | curr_map = map; | |
aeafcbaf | 1287 | curr_dso = dso; |
2e538c4a ACM |
1288 | goto new_symbol; |
1289 | } | |
1290 | ||
1291 | snprintf(dso_name, sizeof(dso_name), | |
aeafcbaf | 1292 | "%s%s", dso->short_name, section_name); |
2e538c4a | 1293 | |
9de89fe7 | 1294 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1295 | if (curr_map == NULL) { |
1296 | u64 start = sym.st_value; | |
1297 | ||
1298 | if (kmodule) | |
1299 | start += map->start + shdr.sh_offset; | |
1300 | ||
00a192b3 | 1301 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1302 | if (curr_dso == NULL) |
1303 | goto out_elf_end; | |
aeafcbaf ACM |
1304 | curr_dso->kernel = dso->kernel; |
1305 | curr_dso->long_name = dso->long_name; | |
1306 | curr_dso->long_name_len = dso->long_name_len; | |
3610583c | 1307 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1308 | map->type); |
2e538c4a ACM |
1309 | if (curr_map == NULL) { |
1310 | dso__delete(curr_dso); | |
1311 | goto out_elf_end; | |
1312 | } | |
ed52ce2e ACM |
1313 | curr_map->map_ip = identity__map_ip; |
1314 | curr_map->unmap_ip = identity__map_ip; | |
aeafcbaf | 1315 | curr_dso->symtab_type = dso->symtab_type; |
9de89fe7 | 1316 | map_groups__insert(kmap->kmaps, curr_map); |
aeafcbaf | 1317 | dsos__add(&dso->node, curr_dso); |
6275ce2d | 1318 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1319 | } else |
1320 | curr_dso = curr_map->dso; | |
1321 | ||
1322 | goto new_symbol; | |
af427bf5 ACM |
1323 | } |
1324 | ||
2e538c4a | 1325 | if (curr_dso->adjust_symbols) { |
9486aa38 ACM |
1326 | pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " " |
1327 | "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__, | |
29a9f66d ACM |
1328 | (u64)sym.st_value, (u64)shdr.sh_addr, |
1329 | (u64)shdr.sh_offset); | |
f5812a7a | 1330 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1331 | } |
28ac909b ACM |
1332 | /* |
1333 | * We need to figure out if the object was created from C++ sources | |
1334 | * DWARF DW_compile_unit has this, but we don't always have access | |
1335 | * to it... | |
1336 | */ | |
83a0944f | 1337 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1338 | if (demangled != NULL) |
83a0944f | 1339 | elf_name = demangled; |
2e538c4a | 1340 | new_symbol: |
c408fedf ACM |
1341 | f = symbol__new(sym.st_value, sym.st_size, |
1342 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1343 | free(demangled); |
a2928c42 ACM |
1344 | if (!f) |
1345 | goto out_elf_end; | |
1346 | ||
2e538c4a | 1347 | if (filter && filter(curr_map, f)) |
00a192b3 | 1348 | symbol__delete(f); |
69ee69f6 | 1349 | else { |
6a4694a4 | 1350 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1351 | nr++; |
1352 | } | |
a2928c42 ACM |
1353 | } |
1354 | ||
2e538c4a ACM |
1355 | /* |
1356 | * For misannotated, zeroed, ASM function sizes. | |
1357 | */ | |
6275ce2d | 1358 | if (nr > 0) { |
694bf407 | 1359 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
aeafcbaf | 1360 | symbols__fixup_end(&dso->symbols[map->type]); |
6275ce2d ACM |
1361 | if (kmap) { |
1362 | /* | |
1363 | * We need to fixup this here too because we create new | |
1364 | * maps here, for things like vsyscall sections. | |
1365 | */ | |
1366 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1367 | } | |
1368 | } | |
a2928c42 ACM |
1369 | err = nr; |
1370 | out_elf_end: | |
1371 | elf_end(elf); | |
1372 | out_close: | |
1373 | return err; | |
1374 | } | |
1375 | ||
aeafcbaf | 1376 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id) |
78075caa | 1377 | { |
aeafcbaf | 1378 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; |
78075caa ACM |
1379 | } |
1380 | ||
a1645ce1 | 1381 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1382 | { |
e30a3d12 | 1383 | bool have_build_id = false; |
57f395a7 FW |
1384 | struct dso *pos; |
1385 | ||
6122e4e4 ACM |
1386 | list_for_each_entry(pos, head, node) { |
1387 | if (with_hits && !pos->hit) | |
1388 | continue; | |
f6e1467d ACM |
1389 | if (pos->has_build_id) { |
1390 | have_build_id = true; | |
1391 | continue; | |
1392 | } | |
e30a3d12 ACM |
1393 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1394 | sizeof(pos->build_id)) > 0) { | |
1395 | have_build_id = true; | |
1396 | pos->has_build_id = true; | |
1397 | } | |
6122e4e4 | 1398 | } |
57f395a7 | 1399 | |
e30a3d12 | 1400 | return have_build_id; |
57f395a7 FW |
1401 | } |
1402 | ||
fd7a346e ACM |
1403 | /* |
1404 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1405 | */ | |
1406 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1407 | ||
21916c38 | 1408 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1409 | { |
21916c38 | 1410 | int err = -1; |
4d1e00a8 ACM |
1411 | GElf_Ehdr ehdr; |
1412 | GElf_Shdr shdr; | |
fd7a346e | 1413 | Elf_Data *data; |
4d1e00a8 | 1414 | Elf_Scn *sec; |
e57cfcda | 1415 | Elf_Kind ek; |
fd7a346e | 1416 | void *ptr; |
4d1e00a8 | 1417 | |
2643ce11 ACM |
1418 | if (size < BUILD_ID_SIZE) |
1419 | goto out; | |
1420 | ||
e57cfcda PE |
1421 | ek = elf_kind(elf); |
1422 | if (ek != ELF_K_ELF) | |
21916c38 | 1423 | goto out; |
e57cfcda | 1424 | |
4d1e00a8 | 1425 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1426 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1427 | goto out; |
4d1e00a8 ACM |
1428 | } |
1429 | ||
2643ce11 ACM |
1430 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1431 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1432 | if (sec == NULL) { |
1433 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1434 | ".notes", NULL); | |
1435 | if (sec == NULL) | |
21916c38 | 1436 | goto out; |
fd7a346e | 1437 | } |
4d1e00a8 | 1438 | |
fd7a346e ACM |
1439 | data = elf_getdata(sec, NULL); |
1440 | if (data == NULL) | |
21916c38 | 1441 | goto out; |
fd7a346e ACM |
1442 | |
1443 | ptr = data->d_buf; | |
1444 | while (ptr < (data->d_buf + data->d_size)) { | |
1445 | GElf_Nhdr *nhdr = ptr; | |
be96ea8f SE |
1446 | size_t namesz = NOTE_ALIGN(nhdr->n_namesz), |
1447 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
fd7a346e ACM |
1448 | const char *name; |
1449 | ||
1450 | ptr += sizeof(*nhdr); | |
1451 | name = ptr; | |
1452 | ptr += namesz; | |
1453 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1454 | nhdr->n_namesz == sizeof("GNU")) { | |
1455 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1456 | size_t sz = min(size, descsz); |
1457 | memcpy(bf, ptr, sz); | |
1458 | memset(bf + sz, 0, size - sz); | |
1459 | err = descsz; | |
fd7a346e ACM |
1460 | break; |
1461 | } | |
1462 | } | |
1463 | ptr += descsz; | |
1464 | } | |
21916c38 DM |
1465 | |
1466 | out: | |
1467 | return err; | |
1468 | } | |
1469 | ||
1470 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1471 | { | |
1472 | int fd, err = -1; | |
1473 | Elf *elf; | |
1474 | ||
1475 | if (size < BUILD_ID_SIZE) | |
1476 | goto out; | |
1477 | ||
1478 | fd = open(filename, O_RDONLY); | |
1479 | if (fd < 0) | |
1480 | goto out; | |
1481 | ||
1482 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1483 | if (elf == NULL) { | |
1484 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1485 | goto out_close; | |
1486 | } | |
1487 | ||
1488 | err = elf_read_build_id(elf, bf, size); | |
1489 | ||
2643ce11 ACM |
1490 | elf_end(elf); |
1491 | out_close: | |
1492 | close(fd); | |
1493 | out: | |
1494 | return err; | |
1495 | } | |
1496 | ||
f1617b40 ACM |
1497 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1498 | { | |
1499 | int fd, err = -1; | |
1500 | ||
1501 | if (size < BUILD_ID_SIZE) | |
1502 | goto out; | |
1503 | ||
1504 | fd = open(filename, O_RDONLY); | |
1505 | if (fd < 0) | |
1506 | goto out; | |
1507 | ||
1508 | while (1) { | |
1509 | char bf[BUFSIZ]; | |
1510 | GElf_Nhdr nhdr; | |
be96ea8f | 1511 | size_t namesz, descsz; |
f1617b40 ACM |
1512 | |
1513 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1514 | break; | |
1515 | ||
fd7a346e ACM |
1516 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1517 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1518 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1519 | nhdr.n_namesz == sizeof("GNU")) { | |
be96ea8f | 1520 | if (read(fd, bf, namesz) != (ssize_t)namesz) |
f1617b40 ACM |
1521 | break; |
1522 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1523 | size_t sz = min(descsz, size); |
1524 | if (read(fd, build_id, sz) == (ssize_t)sz) { | |
1525 | memset(build_id + sz, 0, size - sz); | |
f1617b40 ACM |
1526 | err = 0; |
1527 | break; | |
1528 | } | |
be96ea8f | 1529 | } else if (read(fd, bf, descsz) != (ssize_t)descsz) |
f1617b40 ACM |
1530 | break; |
1531 | } else { | |
1532 | int n = namesz + descsz; | |
1533 | if (read(fd, bf, n) != n) | |
1534 | break; | |
1535 | } | |
1536 | } | |
1537 | close(fd); | |
1538 | out: | |
1539 | return err; | |
1540 | } | |
1541 | ||
aeafcbaf | 1542 | char dso__symtab_origin(const struct dso *dso) |
94cb9e38 ACM |
1543 | { |
1544 | static const char origin[] = { | |
878b439d ACM |
1545 | [SYMTAB__KALLSYMS] = 'k', |
1546 | [SYMTAB__JAVA_JIT] = 'j', | |
1547 | [SYMTAB__BUILD_ID_CACHE] = 'B', | |
1548 | [SYMTAB__FEDORA_DEBUGINFO] = 'f', | |
1549 | [SYMTAB__UBUNTU_DEBUGINFO] = 'u', | |
1550 | [SYMTAB__BUILDID_DEBUGINFO] = 'b', | |
1551 | [SYMTAB__SYSTEM_PATH_DSO] = 'd', | |
1552 | [SYMTAB__SYSTEM_PATH_KMODULE] = 'K', | |
1553 | [SYMTAB__GUEST_KALLSYMS] = 'g', | |
1554 | [SYMTAB__GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1555 | }; |
1556 | ||
aeafcbaf | 1557 | if (dso == NULL || dso->symtab_type == SYMTAB__NOT_FOUND) |
94cb9e38 | 1558 | return '!'; |
aeafcbaf | 1559 | return origin[dso->symtab_type]; |
94cb9e38 ACM |
1560 | } |
1561 | ||
aeafcbaf | 1562 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1563 | { |
4d1e00a8 | 1564 | int size = PATH_MAX; |
c338aee8 | 1565 | char *name; |
a2928c42 ACM |
1566 | int ret = -1; |
1567 | int fd; | |
23346f21 | 1568 | struct machine *machine; |
a1645ce1 | 1569 | const char *root_dir; |
6da80ce8 | 1570 | int want_symtab; |
a2928c42 | 1571 | |
aeafcbaf | 1572 | dso__set_loaded(dso, map->type); |
66bd8424 | 1573 | |
aeafcbaf ACM |
1574 | if (dso->kernel == DSO_TYPE_KERNEL) |
1575 | return dso__load_kernel_sym(dso, map, filter); | |
1576 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1577 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1578 | |
23346f21 ACM |
1579 | if (map->groups && map->groups->machine) |
1580 | machine = map->groups->machine; | |
a1645ce1 | 1581 | else |
23346f21 | 1582 | machine = NULL; |
c338aee8 ACM |
1583 | |
1584 | name = malloc(size); | |
a2928c42 ACM |
1585 | if (!name) |
1586 | return -1; | |
1587 | ||
aeafcbaf | 1588 | dso->adjust_symbols = 0; |
f5812a7a | 1589 | |
aeafcbaf | 1590 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1591 | struct stat st; |
1592 | ||
e9b52ef2 | 1593 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1594 | return -1; |
1595 | ||
1596 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1597 | pr_warning("File %s not owned by current user or root, " | |
1598 | "ignoring it.\n", dso->name); | |
1599 | return -1; | |
1600 | } | |
1601 | ||
aeafcbaf ACM |
1602 | ret = dso__load_perf_map(dso, map, filter); |
1603 | dso->symtab_type = ret > 0 ? SYMTAB__JAVA_JIT : | |
878b439d | 1604 | SYMTAB__NOT_FOUND; |
94cb9e38 ACM |
1605 | return ret; |
1606 | } | |
1607 | ||
6da80ce8 DM |
1608 | /* Iterate over candidate debug images. |
1609 | * On the first pass, only load images if they have a full symtab. | |
1610 | * Failing that, do a second pass where we accept .dynsym also | |
1611 | */ | |
60e4b10c ACM |
1612 | want_symtab = 1; |
1613 | restart: | |
aeafcbaf ACM |
1614 | for (dso->symtab_type = SYMTAB__BUILD_ID_CACHE; |
1615 | dso->symtab_type != SYMTAB__NOT_FOUND; | |
1616 | dso->symtab_type++) { | |
1617 | switch (dso->symtab_type) { | |
878b439d | 1618 | case SYMTAB__BUILD_ID_CACHE: |
ec5761ea DA |
1619 | /* skip the locally configured cache if a symfs is given */ |
1620 | if (symbol_conf.symfs[0] || | |
aeafcbaf | 1621 | (dso__build_id_filename(dso, name, size) == NULL)) { |
6da80ce8 | 1622 | continue; |
ec5761ea | 1623 | } |
6da80ce8 | 1624 | break; |
878b439d | 1625 | case SYMTAB__FEDORA_DEBUGINFO: |
ec5761ea | 1626 | snprintf(name, size, "%s/usr/lib/debug%s.debug", |
aeafcbaf | 1627 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1628 | break; |
878b439d | 1629 | case SYMTAB__UBUNTU_DEBUGINFO: |
ec5761ea | 1630 | snprintf(name, size, "%s/usr/lib/debug%s", |
aeafcbaf | 1631 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1632 | break; |
878b439d | 1633 | case SYMTAB__BUILDID_DEBUGINFO: { |
6da80ce8 DM |
1634 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
1635 | ||
aeafcbaf | 1636 | if (!dso->has_build_id) |
6da80ce8 DM |
1637 | continue; |
1638 | ||
aeafcbaf ACM |
1639 | build_id__sprintf(dso->build_id, |
1640 | sizeof(dso->build_id), | |
6da80ce8 DM |
1641 | build_id_hex); |
1642 | snprintf(name, size, | |
ec5761ea DA |
1643 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", |
1644 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1645 | } |
6da80ce8 | 1646 | break; |
878b439d | 1647 | case SYMTAB__SYSTEM_PATH_DSO: |
ec5761ea | 1648 | snprintf(name, size, "%s%s", |
aeafcbaf | 1649 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1650 | break; |
878b439d | 1651 | case SYMTAB__GUEST_KMODULE: |
fb7d0b3c KM |
1652 | if (map->groups && machine) |
1653 | root_dir = machine->root_dir; | |
a1645ce1 ZY |
1654 | else |
1655 | root_dir = ""; | |
ec5761ea | 1656 | snprintf(name, size, "%s%s%s", symbol_conf.symfs, |
aeafcbaf | 1657 | root_dir, dso->long_name); |
ec5761ea DA |
1658 | break; |
1659 | ||
878b439d | 1660 | case SYMTAB__SYSTEM_PATH_KMODULE: |
ec5761ea | 1661 | snprintf(name, size, "%s%s", symbol_conf.symfs, |
aeafcbaf | 1662 | dso->long_name); |
a1645ce1 | 1663 | break; |
60e4b10c | 1664 | default:; |
a2928c42 | 1665 | } |
6da80ce8 DM |
1666 | |
1667 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1668 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1669 | if (fd < 0) |
1670 | continue; | |
a2928c42 | 1671 | |
aeafcbaf | 1672 | ret = dso__load_sym(dso, map, name, fd, filter, 0, |
6da80ce8 DM |
1673 | want_symtab); |
1674 | close(fd); | |
a2928c42 | 1675 | |
6da80ce8 DM |
1676 | /* |
1677 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1678 | * info!?!? | |
1679 | */ | |
1680 | if (!ret) | |
1681 | continue; | |
a2928c42 | 1682 | |
6da80ce8 | 1683 | if (ret > 0) { |
aeafcbaf ACM |
1684 | int nr_plt = dso__synthesize_plt_symbols(dso, map, |
1685 | filter); | |
6da80ce8 DM |
1686 | if (nr_plt > 0) |
1687 | ret += nr_plt; | |
1688 | break; | |
1689 | } | |
a25e46c4 | 1690 | } |
6da80ce8 | 1691 | |
60e4b10c ACM |
1692 | /* |
1693 | * If we wanted a full symtab but no image had one, | |
1694 | * relax our requirements and repeat the search. | |
1695 | */ | |
1696 | if (ret <= 0 && want_symtab) { | |
1697 | want_symtab = 0; | |
1698 | goto restart; | |
1699 | } | |
1700 | ||
a2928c42 | 1701 | free(name); |
aeafcbaf | 1702 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1703 | return 0; |
a2928c42 ACM |
1704 | return ret; |
1705 | } | |
1706 | ||
aeafcbaf | 1707 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1708 | enum map_type type, const char *name) |
439d473b ACM |
1709 | { |
1710 | struct rb_node *nd; | |
1711 | ||
aeafcbaf | 1712 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1713 | struct map *map = rb_entry(nd, struct map, rb_node); |
1714 | ||
b7cece76 | 1715 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1716 | return map; |
1717 | } | |
1718 | ||
1719 | return NULL; | |
1720 | } | |
1721 | ||
aeafcbaf ACM |
1722 | static int dso__kernel_module_get_build_id(struct dso *dso, |
1723 | const char *root_dir) | |
b7cece76 ACM |
1724 | { |
1725 | char filename[PATH_MAX]; | |
1726 | /* | |
1727 | * kernel module short names are of the form "[module]" and | |
1728 | * we need just "module" here. | |
1729 | */ | |
aeafcbaf | 1730 | const char *name = dso->short_name + 1; |
b7cece76 ACM |
1731 | |
1732 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1733 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1734 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 | 1735 | |
aeafcbaf ACM |
1736 | if (sysfs__read_build_id(filename, dso->build_id, |
1737 | sizeof(dso->build_id)) == 0) | |
1738 | dso->has_build_id = true; | |
b7cece76 ACM |
1739 | |
1740 | return 0; | |
1741 | } | |
1742 | ||
aeafcbaf | 1743 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
a1645ce1 | 1744 | const char *dir_name) |
6cfcc53e | 1745 | { |
439d473b | 1746 | struct dirent *dent; |
5aab621b | 1747 | DIR *dir = opendir(dir_name); |
74534341 | 1748 | int ret = 0; |
6cfcc53e | 1749 | |
439d473b | 1750 | if (!dir) { |
5aab621b | 1751 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1752 | return -1; |
1753 | } | |
6cfcc53e | 1754 | |
439d473b ACM |
1755 | while ((dent = readdir(dir)) != NULL) { |
1756 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1757 | struct stat st; |
1758 | ||
1759 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1760 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1761 | if (stat(path, &st)) | |
1762 | continue; | |
439d473b | 1763 | |
a1645ce1 | 1764 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1765 | if (!strcmp(dent->d_name, ".") || |
1766 | !strcmp(dent->d_name, "..")) | |
1767 | continue; | |
1768 | ||
1769 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1770 | dir_name, dent->d_name); |
aeafcbaf | 1771 | ret = map_groups__set_modules_path_dir(mg, path); |
74534341 GJ |
1772 | if (ret < 0) |
1773 | goto out; | |
439d473b ACM |
1774 | } else { |
1775 | char *dot = strrchr(dent->d_name, '.'), | |
1776 | dso_name[PATH_MAX]; | |
1777 | struct map *map; | |
cfc10d3b | 1778 | char *long_name; |
439d473b ACM |
1779 | |
1780 | if (dot == NULL || strcmp(dot, ".ko")) | |
1781 | continue; | |
1782 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1783 | (int)(dot - dent->d_name), dent->d_name); | |
1784 | ||
a2a99e8e | 1785 | strxfrchar(dso_name, '-', '_'); |
aeafcbaf ACM |
1786 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
1787 | dso_name); | |
439d473b ACM |
1788 | if (map == NULL) |
1789 | continue; | |
1790 | ||
1791 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1792 | dir_name, dent->d_name); |
439d473b | 1793 | |
cfc10d3b | 1794 | long_name = strdup(path); |
74534341 GJ |
1795 | if (long_name == NULL) { |
1796 | ret = -1; | |
1797 | goto out; | |
1798 | } | |
cfc10d3b | 1799 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1800 | map->dso->lname_alloc = 1; |
a1645ce1 | 1801 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1802 | } |
439d473b | 1803 | } |
6cfcc53e | 1804 | |
74534341 | 1805 | out: |
439d473b | 1806 | closedir(dir); |
74534341 | 1807 | return ret; |
439d473b | 1808 | } |
6cfcc53e | 1809 | |
a1645ce1 | 1810 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1811 | { |
a1645ce1 ZY |
1812 | char version[PATH_MAX]; |
1813 | FILE *file; | |
1814 | char *name, *tmp; | |
1815 | const char *prefix = "Linux version "; | |
1816 | ||
1817 | sprintf(version, "%s/proc/version", root_dir); | |
1818 | file = fopen(version, "r"); | |
1819 | if (!file) | |
1820 | return NULL; | |
1821 | ||
1822 | version[0] = '\0'; | |
1823 | tmp = fgets(version, sizeof(version), file); | |
1824 | fclose(file); | |
1825 | ||
1826 | name = strstr(version, prefix); | |
1827 | if (!name) | |
1828 | return NULL; | |
1829 | name += strlen(prefix); | |
1830 | tmp = strchr(name, ' '); | |
1831 | if (tmp) | |
1832 | *tmp = '\0'; | |
1833 | ||
1834 | return strdup(name); | |
1835 | } | |
1836 | ||
aeafcbaf | 1837 | static int machine__set_modules_path(struct machine *machine) |
a1645ce1 ZY |
1838 | { |
1839 | char *version; | |
439d473b | 1840 | char modules_path[PATH_MAX]; |
6cfcc53e | 1841 | |
aeafcbaf | 1842 | version = get_kernel_version(machine->root_dir); |
a1645ce1 | 1843 | if (!version) |
439d473b | 1844 | return -1; |
6cfcc53e | 1845 | |
a1645ce1 | 1846 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
aeafcbaf | 1847 | machine->root_dir, version); |
a1645ce1 | 1848 | free(version); |
6cfcc53e | 1849 | |
aeafcbaf | 1850 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
6cfcc53e MG |
1851 | } |
1852 | ||
439d473b ACM |
1853 | /* |
1854 | * Constructor variant for modules (where we know from /proc/modules where | |
1855 | * they are loaded) and for vmlinux, where only after we load all the | |
1856 | * symbols we'll know where it starts and ends. | |
1857 | */ | |
3610583c | 1858 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1859 | { |
aeafcbaf ACM |
1860 | struct map *map = calloc(1, (sizeof(*map) + |
1861 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
1862 | if (map != NULL) { | |
439d473b | 1863 | /* |
afb7b4f0 | 1864 | * ->end will be filled after we load all the symbols |
439d473b | 1865 | */ |
aeafcbaf | 1866 | map__init(map, type, start, 0, 0, dso); |
439d473b | 1867 | } |
afb7b4f0 | 1868 | |
aeafcbaf | 1869 | return map; |
439d473b ACM |
1870 | } |
1871 | ||
aeafcbaf | 1872 | struct map *machine__new_module(struct machine *machine, u64 start, |
d28c6223 | 1873 | const char *filename) |
b7cece76 ACM |
1874 | { |
1875 | struct map *map; | |
aeafcbaf | 1876 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
1877 | |
1878 | if (dso == NULL) | |
1879 | return NULL; | |
1880 | ||
1881 | map = map__new2(start, dso, MAP__FUNCTION); | |
1882 | if (map == NULL) | |
1883 | return NULL; | |
1884 | ||
aeafcbaf | 1885 | if (machine__is_host(machine)) |
878b439d | 1886 | dso->symtab_type = SYMTAB__SYSTEM_PATH_KMODULE; |
a1645ce1 | 1887 | else |
878b439d | 1888 | dso->symtab_type = SYMTAB__GUEST_KMODULE; |
aeafcbaf | 1889 | map_groups__insert(&machine->kmaps, map); |
b7cece76 ACM |
1890 | return map; |
1891 | } | |
1892 | ||
aeafcbaf | 1893 | static int machine__create_modules(struct machine *machine) |
439d473b ACM |
1894 | { |
1895 | char *line = NULL; | |
1896 | size_t n; | |
a1645ce1 | 1897 | FILE *file; |
439d473b | 1898 | struct map *map; |
a1645ce1 ZY |
1899 | const char *modules; |
1900 | char path[PATH_MAX]; | |
1901 | ||
aeafcbaf | 1902 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
1903 | modules = symbol_conf.default_guest_modules; |
1904 | else { | |
aeafcbaf | 1905 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
1906 | modules = path; |
1907 | } | |
6cfcc53e | 1908 | |
ec80fde7 ACM |
1909 | if (symbol__restricted_filename(path, "/proc/modules")) |
1910 | return -1; | |
1911 | ||
a1645ce1 | 1912 | file = fopen(modules, "r"); |
439d473b ACM |
1913 | if (file == NULL) |
1914 | return -1; | |
6cfcc53e | 1915 | |
439d473b ACM |
1916 | while (!feof(file)) { |
1917 | char name[PATH_MAX]; | |
1918 | u64 start; | |
439d473b ACM |
1919 | char *sep; |
1920 | int line_len; | |
6cfcc53e | 1921 | |
439d473b ACM |
1922 | line_len = getline(&line, &n, file); |
1923 | if (line_len < 0) | |
1924 | break; | |
1925 | ||
1926 | if (!line) | |
1927 | goto out_failure; | |
1928 | ||
1929 | line[--line_len] = '\0'; /* \n */ | |
1930 | ||
1931 | sep = strrchr(line, 'x'); | |
1932 | if (sep == NULL) | |
1933 | continue; | |
1934 | ||
1935 | hex2u64(sep + 1, &start); | |
1936 | ||
1937 | sep = strchr(line, ' '); | |
1938 | if (sep == NULL) | |
1939 | continue; | |
1940 | ||
1941 | *sep = '\0'; | |
1942 | ||
1943 | snprintf(name, sizeof(name), "[%s]", line); | |
aeafcbaf | 1944 | map = machine__new_module(machine, start, name); |
b7cece76 | 1945 | if (map == NULL) |
439d473b | 1946 | goto out_delete_line; |
aeafcbaf | 1947 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
6cfcc53e | 1948 | } |
439d473b ACM |
1949 | |
1950 | free(line); | |
1951 | fclose(file); | |
1952 | ||
aeafcbaf | 1953 | return machine__set_modules_path(machine); |
439d473b ACM |
1954 | |
1955 | out_delete_line: | |
1956 | free(line); | |
1957 | out_failure: | |
1958 | return -1; | |
6cfcc53e MG |
1959 | } |
1960 | ||
aeafcbaf | 1961 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 1962 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1963 | { |
fbd733b8 | 1964 | int err = -1, fd; |
ec5761ea | 1965 | char symfs_vmlinux[PATH_MAX]; |
a2928c42 | 1966 | |
a639dc64 | 1967 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea DA |
1968 | symbol_conf.symfs, vmlinux); |
1969 | fd = open(symfs_vmlinux, O_RDONLY); | |
a2928c42 ACM |
1970 | if (fd < 0) |
1971 | return -1; | |
1972 | ||
aeafcbaf ACM |
1973 | dso__set_long_name(dso, (char *)vmlinux); |
1974 | dso__set_loaded(dso, map->type); | |
1975 | err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0); | |
a2928c42 ACM |
1976 | close(fd); |
1977 | ||
3846df2e | 1978 | if (err > 0) |
ec5761ea | 1979 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
3846df2e | 1980 | |
a2928c42 ACM |
1981 | return err; |
1982 | } | |
1983 | ||
aeafcbaf | 1984 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1985 | symbol_filter_t filter) |
a19afe46 ACM |
1986 | { |
1987 | int i, err = 0; | |
5ad90e4e | 1988 | char *filename; |
a19afe46 ACM |
1989 | |
1990 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1991 | vmlinux_path__nr_entries + 1); |
1992 | ||
aeafcbaf | 1993 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1994 | if (filename != NULL) { |
aeafcbaf | 1995 | err = dso__load_vmlinux(dso, map, filename, filter); |
5ad90e4e | 1996 | if (err > 0) { |
aeafcbaf | 1997 | dso__set_long_name(dso, filename); |
5ad90e4e ACM |
1998 | goto out; |
1999 | } | |
2000 | free(filename); | |
2001 | } | |
a19afe46 ACM |
2002 | |
2003 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 2004 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 2005 | if (err > 0) { |
aeafcbaf | 2006 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
a19afe46 ACM |
2007 | break; |
2008 | } | |
2009 | } | |
5ad90e4e | 2010 | out: |
a19afe46 ACM |
2011 | return err; |
2012 | } | |
2013 | ||
aeafcbaf | 2014 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 2015 | symbol_filter_t filter) |
a827c875 | 2016 | { |
cc612d81 | 2017 | int err; |
9e201442 ACM |
2018 | const char *kallsyms_filename = NULL; |
2019 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 2020 | /* |
b226a5a7 DA |
2021 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
2022 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
2023 | * |
2024 | * For instance, try to analyse an ARM perf.data file _without_ a | |
2025 | * build-id, or if the user specifies the wrong path to the right | |
2026 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
2027 | * x86_86 one, on the machine where analysis is being performed, say), | |
2028 | * or worse, /proc/kallsyms. | |
2029 | * | |
2030 | * If the specified file _has_ a build-id and there is a build-id | |
2031 | * section in the perf.data file, we will still do the expected | |
2032 | * validation in dso__load_vmlinux and will bail out if they don't | |
2033 | * match. | |
2034 | */ | |
b226a5a7 DA |
2035 | if (symbol_conf.kallsyms_name != NULL) { |
2036 | kallsyms_filename = symbol_conf.kallsyms_name; | |
2037 | goto do_kallsyms; | |
2038 | } | |
2039 | ||
dc8d6ab2 | 2040 | if (symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 2041 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 2042 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 2043 | if (err > 0) { |
aeafcbaf | 2044 | dso__set_long_name(dso, |
e7dadc00 ACM |
2045 | strdup(symbol_conf.vmlinux_name)); |
2046 | goto out_fixup; | |
2047 | } | |
2048 | return err; | |
dc8d6ab2 | 2049 | } |
cc612d81 ACM |
2050 | |
2051 | if (vmlinux_path != NULL) { | |
aeafcbaf | 2052 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 ACM |
2053 | if (err > 0) |
2054 | goto out_fixup; | |
cc612d81 ACM |
2055 | } |
2056 | ||
ec5761ea DA |
2057 | /* do not try local files if a symfs was given */ |
2058 | if (symbol_conf.symfs[0] != 0) | |
2059 | return -1; | |
2060 | ||
b7cece76 ACM |
2061 | /* |
2062 | * Say the kernel DSO was created when processing the build-id header table, | |
2063 | * we have a build-id, so check if it is the same as the running kernel, | |
2064 | * using it if it is. | |
2065 | */ | |
aeafcbaf | 2066 | if (dso->has_build_id) { |
b7cece76 | 2067 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 2068 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
2069 | |
2070 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 2071 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 2072 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 2073 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 2074 | goto do_kallsyms; |
9e201442 | 2075 | } |
8d0591f6 | 2076 | } |
dc8d6ab2 ACM |
2077 | /* |
2078 | * Now look if we have it on the build-id cache in | |
2079 | * $HOME/.debug/[kernel.kallsyms]. | |
2080 | */ | |
aeafcbaf | 2081 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
2082 | sbuild_id); |
2083 | ||
2084 | if (asprintf(&kallsyms_allocated_filename, | |
2085 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
2086 | getenv("HOME"), sbuild_id) == -1) { |
2087 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 2088 | return -1; |
3846df2e | 2089 | } |
dc8d6ab2 | 2090 | |
19fc2ded ACM |
2091 | kallsyms_filename = kallsyms_allocated_filename; |
2092 | ||
dc8d6ab2 | 2093 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
2094 | pr_err("No kallsyms or vmlinux with build-id %s " |
2095 | "was found\n", sbuild_id); | |
9e201442 | 2096 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 2097 | return -1; |
9e201442 | 2098 | } |
dc8d6ab2 ACM |
2099 | } else { |
2100 | /* | |
2101 | * Last resort, if we don't have a build-id and couldn't find | |
2102 | * any vmlinux file, try the running kernel kallsyms table. | |
2103 | */ | |
9e201442 | 2104 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 2105 | } |
439d473b | 2106 | |
cc612d81 | 2107 | do_kallsyms: |
aeafcbaf | 2108 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
2109 | if (err > 0) |
2110 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2111 | free(kallsyms_allocated_filename); |
439d473b ACM |
2112 | |
2113 | if (err > 0) { | |
cc612d81 | 2114 | out_fixup: |
e1c7c6a4 | 2115 | if (kallsyms_filename != NULL) |
aeafcbaf | 2116 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
2117 | map__fixup_start(map); |
2118 | map__fixup_end(map); | |
439d473b | 2119 | } |
94cb9e38 | 2120 | |
a827c875 ACM |
2121 | return err; |
2122 | } | |
2123 | ||
aeafcbaf ACM |
2124 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
2125 | symbol_filter_t filter) | |
a1645ce1 ZY |
2126 | { |
2127 | int err; | |
2128 | const char *kallsyms_filename = NULL; | |
23346f21 | 2129 | struct machine *machine; |
a1645ce1 ZY |
2130 | char path[PATH_MAX]; |
2131 | ||
2132 | if (!map->groups) { | |
2133 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
2134 | return -1; | |
2135 | } | |
23346f21 | 2136 | machine = map->groups->machine; |
a1645ce1 | 2137 | |
23346f21 | 2138 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2139 | /* |
2140 | * if the user specified a vmlinux filename, use it and only | |
2141 | * it, reporting errors to the user if it cannot be used. | |
2142 | * Or use file guest_kallsyms inputted by user on commandline | |
2143 | */ | |
2144 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2145 | err = dso__load_vmlinux(dso, map, |
a1645ce1 ZY |
2146 | symbol_conf.default_guest_vmlinux_name, filter); |
2147 | goto out_try_fixup; | |
2148 | } | |
2149 | ||
2150 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2151 | if (!kallsyms_filename) | |
2152 | return -1; | |
2153 | } else { | |
23346f21 | 2154 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2155 | kallsyms_filename = path; |
2156 | } | |
2157 | ||
aeafcbaf | 2158 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
a1645ce1 ZY |
2159 | if (err > 0) |
2160 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
2161 | ||
2162 | out_try_fixup: | |
2163 | if (err > 0) { | |
2164 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 2165 | machine__mmap_name(machine, path, sizeof(path)); |
aeafcbaf | 2166 | dso__set_long_name(dso, strdup(path)); |
a1645ce1 ZY |
2167 | } |
2168 | map__fixup_start(map); | |
2169 | map__fixup_end(map); | |
2170 | } | |
2171 | ||
2172 | return err; | |
2173 | } | |
cd84c2ac | 2174 | |
b0da954a | 2175 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 2176 | { |
b0da954a | 2177 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
2178 | } |
2179 | ||
b0da954a | 2180 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
2181 | { |
2182 | struct dso *pos; | |
2183 | ||
b0da954a | 2184 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 2185 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
2186 | return pos; |
2187 | return NULL; | |
2188 | } | |
2189 | ||
a89e5abe | 2190 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2191 | { |
a89e5abe | 2192 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2193 | |
e4204992 | 2194 | if (!dso) { |
00a192b3 | 2195 | dso = dso__new(name); |
cfc10d3b | 2196 | if (dso != NULL) { |
a89e5abe | 2197 | dsos__add(head, dso); |
cfc10d3b ACM |
2198 | dso__set_basename(dso); |
2199 | } | |
66bd8424 | 2200 | } |
cd84c2ac FW |
2201 | |
2202 | return dso; | |
cd84c2ac FW |
2203 | } |
2204 | ||
1f626bc3 | 2205 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2206 | { |
2207 | struct dso *pos; | |
cbf69680 | 2208 | size_t ret = 0; |
cd84c2ac | 2209 | |
95011c60 ACM |
2210 | list_for_each_entry(pos, head, node) { |
2211 | int i; | |
2212 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2213 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2214 | } |
cbf69680 ACM |
2215 | |
2216 | return ret; | |
cd84c2ac FW |
2217 | } |
2218 | ||
aeafcbaf | 2219 | size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp) |
b0da954a | 2220 | { |
a1645ce1 | 2221 | struct rb_node *nd; |
cbf69680 | 2222 | size_t ret = 0; |
a1645ce1 | 2223 | |
aeafcbaf | 2224 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2225 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2226 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2227 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2228 | } |
cbf69680 ACM |
2229 | |
2230 | return ret; | |
b0da954a ACM |
2231 | } |
2232 | ||
88d3d9b7 ACM |
2233 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2234 | bool with_hits) | |
9e03eb2d ACM |
2235 | { |
2236 | struct dso *pos; | |
2237 | size_t ret = 0; | |
2238 | ||
b0da954a | 2239 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2240 | if (with_hits && !pos->hit) |
2241 | continue; | |
9e03eb2d | 2242 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2243 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2244 | } |
2245 | return ret; | |
2246 | } | |
2247 | ||
aeafcbaf ACM |
2248 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
2249 | bool with_hits) | |
f869097e | 2250 | { |
aeafcbaf ACM |
2251 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) + |
2252 | __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits); | |
f869097e ACM |
2253 | } |
2254 | ||
aeafcbaf ACM |
2255 | size_t machines__fprintf_dsos_buildid(struct rb_root *machines, |
2256 | FILE *fp, bool with_hits) | |
b0da954a | 2257 | { |
a1645ce1 ZY |
2258 | struct rb_node *nd; |
2259 | size_t ret = 0; | |
2260 | ||
aeafcbaf | 2261 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2262 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2263 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2264 | } |
2265 | return ret; | |
b0da954a ACM |
2266 | } |
2267 | ||
f57b05ed JO |
2268 | static struct dso* |
2269 | dso__kernel_findnew(struct machine *machine, const char *name, | |
2270 | const char *short_name, int dso_type) | |
fd1d908c | 2271 | { |
f57b05ed JO |
2272 | /* |
2273 | * The kernel dso could be created by build_id processing. | |
2274 | */ | |
2275 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
a1645ce1 | 2276 | |
f57b05ed JO |
2277 | /* |
2278 | * We need to run this in all cases, since during the build_id | |
2279 | * processing we had no idea this was the kernel dso. | |
2280 | */ | |
aeafcbaf | 2281 | if (dso != NULL) { |
f57b05ed JO |
2282 | dso__set_short_name(dso, short_name); |
2283 | dso->kernel = dso_type; | |
fd1d908c ACM |
2284 | } |
2285 | ||
aeafcbaf | 2286 | return dso; |
fd1d908c ACM |
2287 | } |
2288 | ||
aeafcbaf | 2289 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
fd1d908c | 2290 | { |
a1645ce1 ZY |
2291 | char path[PATH_MAX]; |
2292 | ||
23346f21 | 2293 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2294 | return; |
23346f21 | 2295 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
aeafcbaf ACM |
2296 | if (sysfs__read_build_id(path, dso->build_id, |
2297 | sizeof(dso->build_id)) == 0) | |
2298 | dso->has_build_id = true; | |
fd1d908c ACM |
2299 | } |
2300 | ||
f57b05ed | 2301 | static struct dso *machine__get_kernel(struct machine *machine) |
cd84c2ac | 2302 | { |
a1645ce1 ZY |
2303 | const char *vmlinux_name = NULL; |
2304 | struct dso *kernel; | |
cd84c2ac | 2305 | |
aeafcbaf | 2306 | if (machine__is_host(machine)) { |
a1645ce1 | 2307 | vmlinux_name = symbol_conf.vmlinux_name; |
f57b05ed JO |
2308 | if (!vmlinux_name) |
2309 | vmlinux_name = "[kernel.kallsyms]"; | |
2310 | ||
2311 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2312 | "[kernel]", | |
2313 | DSO_TYPE_KERNEL); | |
a1645ce1 | 2314 | } else { |
f57b05ed JO |
2315 | char bf[PATH_MAX]; |
2316 | ||
aeafcbaf | 2317 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2318 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
f57b05ed JO |
2319 | if (!vmlinux_name) |
2320 | vmlinux_name = machine__mmap_name(machine, bf, | |
2321 | sizeof(bf)); | |
2322 | ||
2323 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2324 | "[guest.kernel]", | |
2325 | DSO_TYPE_GUEST_KERNEL); | |
8d92c02a | 2326 | } |
cd84c2ac | 2327 | |
f57b05ed | 2328 | if (kernel != NULL && (!kernel->has_build_id)) |
aeafcbaf | 2329 | dso__read_running_kernel_build_id(kernel, machine); |
f57b05ed | 2330 | |
f1dfa0b1 | 2331 | return kernel; |
f1dfa0b1 ACM |
2332 | } |
2333 | ||
d214afbd ML |
2334 | struct process_args { |
2335 | u64 start; | |
2336 | }; | |
2337 | ||
2338 | static int symbol__in_kernel(void *arg, const char *name, | |
3b01a413 | 2339 | char type __used, u64 start, u64 end __used) |
d214afbd ML |
2340 | { |
2341 | struct process_args *args = arg; | |
2342 | ||
2343 | if (strchr(name, '[')) | |
2344 | return 0; | |
2345 | ||
2346 | args->start = start; | |
2347 | return 1; | |
2348 | } | |
2349 | ||
2350 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
2351 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
2352 | { | |
2353 | const char *filename; | |
2354 | char path[PATH_MAX]; | |
2355 | struct process_args args; | |
2356 | ||
2357 | if (machine__is_host(machine)) { | |
2358 | filename = "/proc/kallsyms"; | |
2359 | } else { | |
2360 | if (machine__is_default_guest(machine)) | |
2361 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
2362 | else { | |
2363 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
2364 | filename = path; | |
2365 | } | |
2366 | } | |
2367 | ||
ec80fde7 ACM |
2368 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
2369 | return 0; | |
2370 | ||
d214afbd ML |
2371 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
2372 | return 0; | |
2373 | ||
2374 | return args.start; | |
2375 | } | |
2376 | ||
aeafcbaf | 2377 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
f1dfa0b1 | 2378 | { |
de176489 | 2379 | enum map_type type; |
aeafcbaf | 2380 | u64 start = machine__get_kernel_start_addr(machine); |
f1dfa0b1 | 2381 | |
de176489 | 2382 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2383 | struct kmap *kmap; |
2384 | ||
aeafcbaf ACM |
2385 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
2386 | if (machine->vmlinux_maps[type] == NULL) | |
de176489 | 2387 | return -1; |
f1dfa0b1 | 2388 | |
aeafcbaf ACM |
2389 | machine->vmlinux_maps[type]->map_ip = |
2390 | machine->vmlinux_maps[type]->unmap_ip = | |
2391 | identity__map_ip; | |
2392 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
2393 | kmap->kmaps = &machine->kmaps; | |
2394 | map_groups__insert(&machine->kmaps, | |
2395 | machine->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2396 | } |
2397 | ||
f1dfa0b1 | 2398 | return 0; |
2446042c ACM |
2399 | } |
2400 | ||
aeafcbaf | 2401 | void machine__destroy_kernel_maps(struct machine *machine) |
076c6e45 ACM |
2402 | { |
2403 | enum map_type type; | |
2404 | ||
2405 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2406 | struct kmap *kmap; | |
2407 | ||
aeafcbaf | 2408 | if (machine->vmlinux_maps[type] == NULL) |
076c6e45 ACM |
2409 | continue; |
2410 | ||
aeafcbaf ACM |
2411 | kmap = map__kmap(machine->vmlinux_maps[type]); |
2412 | map_groups__remove(&machine->kmaps, | |
2413 | machine->vmlinux_maps[type]); | |
076c6e45 ACM |
2414 | if (kmap->ref_reloc_sym) { |
2415 | /* | |
2416 | * ref_reloc_sym is shared among all maps, so free just | |
2417 | * on one of them. | |
2418 | */ | |
2419 | if (type == MAP__FUNCTION) { | |
2420 | free((char *)kmap->ref_reloc_sym->name); | |
2421 | kmap->ref_reloc_sym->name = NULL; | |
2422 | free(kmap->ref_reloc_sym); | |
2423 | } | |
2424 | kmap->ref_reloc_sym = NULL; | |
2425 | } | |
2426 | ||
aeafcbaf ACM |
2427 | map__delete(machine->vmlinux_maps[type]); |
2428 | machine->vmlinux_maps[type] = NULL; | |
076c6e45 ACM |
2429 | } |
2430 | } | |
2431 | ||
aeafcbaf | 2432 | int machine__create_kernel_maps(struct machine *machine) |
5c0541d5 | 2433 | { |
f57b05ed | 2434 | struct dso *kernel = machine__get_kernel(machine); |
5c0541d5 ACM |
2435 | |
2436 | if (kernel == NULL || | |
aeafcbaf | 2437 | __machine__create_kernel_maps(machine, kernel) < 0) |
5c0541d5 ACM |
2438 | return -1; |
2439 | ||
aeafcbaf | 2440 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) |
5c0541d5 ACM |
2441 | pr_debug("Problems creating module maps, continuing anyway...\n"); |
2442 | /* | |
2443 | * Now that we have all the maps created, just set the ->end of them: | |
2444 | */ | |
aeafcbaf | 2445 | map_groups__fixup_end(&machine->kmaps); |
5c0541d5 ACM |
2446 | return 0; |
2447 | } | |
2448 | ||
cc612d81 ACM |
2449 | static void vmlinux_path__exit(void) |
2450 | { | |
2451 | while (--vmlinux_path__nr_entries >= 0) { | |
2452 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2453 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2454 | } | |
2455 | ||
2456 | free(vmlinux_path); | |
2457 | vmlinux_path = NULL; | |
2458 | } | |
2459 | ||
2460 | static int vmlinux_path__init(void) | |
2461 | { | |
2462 | struct utsname uts; | |
2463 | char bf[PATH_MAX]; | |
2464 | ||
cc612d81 ACM |
2465 | vmlinux_path = malloc(sizeof(char *) * 5); |
2466 | if (vmlinux_path == NULL) | |
2467 | return -1; | |
2468 | ||
2469 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2470 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2471 | goto out_fail; | |
2472 | ++vmlinux_path__nr_entries; | |
2473 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2474 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2475 | goto out_fail; | |
2476 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
2477 | |
2478 | /* only try running kernel version if no symfs was given */ | |
2479 | if (symbol_conf.symfs[0] != 0) | |
2480 | return 0; | |
2481 | ||
2482 | if (uname(&uts) < 0) | |
2483 | return -1; | |
2484 | ||
cc612d81 ACM |
2485 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
2486 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2487 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2488 | goto out_fail; | |
2489 | ++vmlinux_path__nr_entries; | |
2490 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2491 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2492 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2493 | goto out_fail; | |
2494 | ++vmlinux_path__nr_entries; | |
2495 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2496 | uts.release); | |
2497 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2498 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2499 | goto out_fail; | |
2500 | ++vmlinux_path__nr_entries; | |
2501 | ||
2502 | return 0; | |
2503 | ||
2504 | out_fail: | |
2505 | vmlinux_path__exit(); | |
2506 | return -1; | |
2507 | } | |
2508 | ||
aeafcbaf | 2509 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
b0a9ab62 ACM |
2510 | { |
2511 | int i; | |
2512 | size_t printed = 0; | |
aeafcbaf | 2513 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
5ad90e4e ACM |
2514 | |
2515 | if (kdso->has_build_id) { | |
2516 | char filename[PATH_MAX]; | |
2517 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2518 | printed += fprintf(fp, "[0] %s\n", filename); | |
2519 | } | |
b0a9ab62 ACM |
2520 | |
2521 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2522 | printed += fprintf(fp, "[%d] %s\n", |
2523 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2524 | |
2525 | return printed; | |
2526 | } | |
2527 | ||
655000e7 ACM |
2528 | static int setup_list(struct strlist **list, const char *list_str, |
2529 | const char *list_name) | |
2530 | { | |
2531 | if (list_str == NULL) | |
2532 | return 0; | |
2533 | ||
2534 | *list = strlist__new(true, list_str); | |
2535 | if (!*list) { | |
2536 | pr_err("problems parsing %s list\n", list_name); | |
2537 | return -1; | |
2538 | } | |
2539 | return 0; | |
2540 | } | |
2541 | ||
ec80fde7 ACM |
2542 | static bool symbol__read_kptr_restrict(void) |
2543 | { | |
2544 | bool value = false; | |
2545 | ||
2546 | if (geteuid() != 0) { | |
2547 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
2548 | if (fp != NULL) { | |
2549 | char line[8]; | |
2550 | ||
2551 | if (fgets(line, sizeof(line), fp) != NULL) | |
2552 | value = atoi(line) != 0; | |
2553 | ||
2554 | fclose(fp); | |
2555 | } | |
2556 | } | |
2557 | ||
2558 | return value; | |
2559 | } | |
2560 | ||
75be6cf4 | 2561 | int symbol__init(void) |
2446042c | 2562 | { |
ec5761ea DA |
2563 | const char *symfs; |
2564 | ||
85e00b55 JZ |
2565 | if (symbol_conf.initialized) |
2566 | return 0; | |
2567 | ||
4d439517 DM |
2568 | symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); |
2569 | ||
95011c60 | 2570 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2571 | if (symbol_conf.sort_by_name) |
2572 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2573 | sizeof(struct symbol)); | |
b32d133a | 2574 | |
75be6cf4 | 2575 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2576 | return -1; |
2577 | ||
c410a338 ACM |
2578 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2579 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2580 | return -1; | |
2581 | } | |
2582 | ||
655000e7 ACM |
2583 | if (setup_list(&symbol_conf.dso_list, |
2584 | symbol_conf.dso_list_str, "dso") < 0) | |
2585 | return -1; | |
2586 | ||
2587 | if (setup_list(&symbol_conf.comm_list, | |
2588 | symbol_conf.comm_list_str, "comm") < 0) | |
2589 | goto out_free_dso_list; | |
2590 | ||
2591 | if (setup_list(&symbol_conf.sym_list, | |
2592 | symbol_conf.sym_list_str, "symbol") < 0) | |
2593 | goto out_free_comm_list; | |
2594 | ||
ec5761ea DA |
2595 | /* |
2596 | * A path to symbols of "/" is identical to "" | |
2597 | * reset here for simplicity. | |
2598 | */ | |
2599 | symfs = realpath(symbol_conf.symfs, NULL); | |
2600 | if (symfs == NULL) | |
2601 | symfs = symbol_conf.symfs; | |
2602 | if (strcmp(symfs, "/") == 0) | |
2603 | symbol_conf.symfs = ""; | |
2604 | if (symfs != symbol_conf.symfs) | |
2605 | free((void *)symfs); | |
2606 | ||
ec80fde7 ACM |
2607 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2608 | ||
85e00b55 | 2609 | symbol_conf.initialized = true; |
4aa65636 | 2610 | return 0; |
655000e7 ACM |
2611 | |
2612 | out_free_dso_list: | |
2613 | strlist__delete(symbol_conf.dso_list); | |
2614 | out_free_comm_list: | |
2615 | strlist__delete(symbol_conf.comm_list); | |
2616 | return -1; | |
4aa65636 ACM |
2617 | } |
2618 | ||
d65a458b ACM |
2619 | void symbol__exit(void) |
2620 | { | |
85e00b55 JZ |
2621 | if (!symbol_conf.initialized) |
2622 | return; | |
d65a458b ACM |
2623 | strlist__delete(symbol_conf.sym_list); |
2624 | strlist__delete(symbol_conf.dso_list); | |
2625 | strlist__delete(symbol_conf.comm_list); | |
2626 | vmlinux_path__exit(); | |
2627 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2628 | symbol_conf.initialized = false; |
d65a458b ACM |
2629 | } |
2630 | ||
aeafcbaf | 2631 | int machines__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2632 | { |
aeafcbaf | 2633 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2634 | |
23346f21 | 2635 | if (machine == NULL) |
a1645ce1 | 2636 | return -1; |
cc612d81 | 2637 | |
5c0541d5 | 2638 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2639 | } |
5aab621b ACM |
2640 | |
2641 | static int hex(char ch) | |
2642 | { | |
2643 | if ((ch >= '0') && (ch <= '9')) | |
2644 | return ch - '0'; | |
2645 | if ((ch >= 'a') && (ch <= 'f')) | |
2646 | return ch - 'a' + 10; | |
2647 | if ((ch >= 'A') && (ch <= 'F')) | |
2648 | return ch - 'A' + 10; | |
2649 | return -1; | |
2650 | } | |
2651 | ||
2652 | /* | |
2653 | * While we find nice hex chars, build a long_val. | |
2654 | * Return number of chars processed. | |
2655 | */ | |
2656 | int hex2u64(const char *ptr, u64 *long_val) | |
2657 | { | |
2658 | const char *p = ptr; | |
2659 | *long_val = 0; | |
2660 | ||
2661 | while (*p) { | |
2662 | const int hex_val = hex(*p); | |
2663 | ||
2664 | if (hex_val < 0) | |
2665 | break; | |
2666 | ||
2667 | *long_val = (*long_val << 4) | hex_val; | |
2668 | p++; | |
2669 | } | |
2670 | ||
2671 | return p - ptr; | |
2672 | } | |
2673 | ||
2674 | char *strxfrchar(char *s, char from, char to) | |
2675 | { | |
2676 | char *p = s; | |
2677 | ||
2678 | while ((p = strchr(p, from)) != NULL) | |
2679 | *p++ = to; | |
2680 | ||
2681 | return s; | |
2682 | } | |
a1645ce1 | 2683 | |
aeafcbaf | 2684 | int machines__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2685 | { |
2686 | int ret = 0; | |
2687 | struct dirent **namelist = NULL; | |
2688 | int i, items = 0; | |
2689 | char path[PATH_MAX]; | |
2690 | pid_t pid; | |
2691 | ||
2692 | if (symbol_conf.default_guest_vmlinux_name || | |
2693 | symbol_conf.default_guest_modules || | |
2694 | symbol_conf.default_guest_kallsyms) { | |
aeafcbaf | 2695 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2696 | } |
2697 | ||
2698 | if (symbol_conf.guestmount) { | |
2699 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2700 | if (items <= 0) | |
2701 | return -ENOENT; | |
2702 | for (i = 0; i < items; i++) { | |
2703 | if (!isdigit(namelist[i]->d_name[0])) { | |
2704 | /* Filter out . and .. */ | |
2705 | continue; | |
2706 | } | |
2707 | pid = atoi(namelist[i]->d_name); | |
2708 | sprintf(path, "%s/%s/proc/kallsyms", | |
2709 | symbol_conf.guestmount, | |
2710 | namelist[i]->d_name); | |
2711 | ret = access(path, R_OK); | |
2712 | if (ret) { | |
2713 | pr_debug("Can't access file %s\n", path); | |
2714 | goto failure; | |
2715 | } | |
aeafcbaf | 2716 | machines__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2717 | } |
2718 | failure: | |
2719 | free(namelist); | |
2720 | } | |
2721 | ||
2722 | return ret; | |
2723 | } | |
5c0541d5 | 2724 | |
aeafcbaf | 2725 | void machines__destroy_guest_kernel_maps(struct rb_root *machines) |
076c6e45 | 2726 | { |
aeafcbaf | 2727 | struct rb_node *next = rb_first(machines); |
076c6e45 ACM |
2728 | |
2729 | while (next) { | |
2730 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2731 | ||
2732 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 2733 | rb_erase(&pos->rb_node, machines); |
076c6e45 ACM |
2734 | machine__delete(pos); |
2735 | } | |
2736 | } | |
2737 | ||
aeafcbaf | 2738 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
5c0541d5 ACM |
2739 | enum map_type type, symbol_filter_t filter) |
2740 | { | |
aeafcbaf | 2741 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2742 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
2743 | ||
2744 | if (ret > 0) { | |
2745 | dso__set_loaded(map->dso, type); | |
2746 | /* | |
2747 | * Since /proc/kallsyms will have multiple sessions for the | |
2748 | * kernel, with modules between them, fixup the end of all | |
2749 | * sections. | |
2750 | */ | |
aeafcbaf | 2751 | __map_groups__fixup_end(&machine->kmaps, type); |
5c0541d5 ACM |
2752 | } |
2753 | ||
2754 | return ret; | |
2755 | } | |
2756 | ||
aeafcbaf | 2757 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
5c0541d5 ACM |
2758 | symbol_filter_t filter) |
2759 | { | |
aeafcbaf | 2760 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2761 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
2762 | ||
2763 | if (ret > 0) { | |
2764 | dso__set_loaded(map->dso, type); | |
2765 | map__reloc_vmlinux(map); | |
2766 | } | |
2767 | ||
2768 | return ret; | |
2769 | } |