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Commit | Line | Data |
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5aab621b ACM |
1 | #include <ctype.h> |
2 | #include <dirent.h> | |
3 | #include <errno.h> | |
4 | #include <libgen.h> | |
5 | #include <stdlib.h> | |
6 | #include <stdio.h> | |
7 | #include <string.h> | |
8 | #include <sys/types.h> | |
9 | #include <sys/stat.h> | |
10 | #include <sys/param.h> | |
11 | #include <fcntl.h> | |
12 | #include <unistd.h> | |
9486aa38 | 13 | #include <inttypes.h> |
b36f19d5 | 14 | #include "build-id.h" |
8a6c5b26 | 15 | #include "debug.h" |
a2928c42 | 16 | #include "symbol.h" |
5aab621b | 17 | #include "strlist.h" |
a2928c42 ACM |
18 | |
19 | #include <libelf.h> | |
20 | #include <gelf.h> | |
21 | #include <elf.h> | |
f1617b40 | 22 | #include <limits.h> |
439d473b | 23 | #include <sys/utsname.h> |
2cdbc46d | 24 | |
3b01a413 | 25 | #ifndef KSYM_NAME_LEN |
c752d040 | 26 | #define KSYM_NAME_LEN 256 |
3b01a413 ACM |
27 | #endif |
28 | ||
c12e15e7 ACM |
29 | #ifndef NT_GNU_BUILD_ID |
30 | #define NT_GNU_BUILD_ID 3 | |
31 | #endif | |
32 | ||
aeafcbaf | 33 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id); |
21916c38 | 34 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); |
b0da954a | 35 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 36 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
aeafcbaf | 37 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 38 | symbol_filter_t filter); |
aeafcbaf | 39 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 40 | symbol_filter_t filter); |
cc612d81 ACM |
41 | static int vmlinux_path__nr_entries; |
42 | static char **vmlinux_path; | |
439d473b | 43 | |
75be6cf4 | 44 | struct symbol_conf symbol_conf = { |
d599db3f | 45 | .exclude_other = true, |
b32d133a ACM |
46 | .use_modules = true, |
47 | .try_vmlinux_path = true, | |
3e6a2a7f | 48 | .annotate_src = true, |
ec5761ea | 49 | .symfs = "", |
b32d133a ACM |
50 | }; |
51 | ||
aeafcbaf | 52 | int dso__name_len(const struct dso *dso) |
8a6c5b26 ACM |
53 | { |
54 | if (verbose) | |
aeafcbaf | 55 | return dso->long_name_len; |
8a6c5b26 | 56 | |
aeafcbaf | 57 | return dso->short_name_len; |
8a6c5b26 ACM |
58 | } |
59 | ||
aeafcbaf | 60 | bool dso__loaded(const struct dso *dso, enum map_type type) |
3610583c | 61 | { |
aeafcbaf | 62 | return dso->loaded & (1 << type); |
3610583c ACM |
63 | } |
64 | ||
aeafcbaf | 65 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) |
79406cd7 | 66 | { |
aeafcbaf | 67 | return dso->sorted_by_name & (1 << type); |
79406cd7 ACM |
68 | } |
69 | ||
aeafcbaf | 70 | static void dso__set_sorted_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 71 | { |
aeafcbaf | 72 | dso->sorted_by_name |= (1 << type); |
79406cd7 ACM |
73 | } |
74 | ||
36a3e646 | 75 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 76 | { |
31877908 AB |
77 | symbol_type = toupper(symbol_type); |
78 | ||
6893d4ee ACM |
79 | switch (map_type) { |
80 | case MAP__FUNCTION: | |
81 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 82 | case MAP__VARIABLE: |
31877908 | 83 | return symbol_type == 'D'; |
6893d4ee ACM |
84 | default: |
85 | return false; | |
86 | } | |
87 | } | |
88 | ||
694bf407 AB |
89 | static int prefix_underscores_count(const char *str) |
90 | { | |
91 | const char *tail = str; | |
92 | ||
93 | while (*tail == '_') | |
94 | tail++; | |
95 | ||
96 | return tail - str; | |
97 | } | |
98 | ||
99 | #define SYMBOL_A 0 | |
100 | #define SYMBOL_B 1 | |
101 | ||
102 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
103 | { | |
104 | s64 a; | |
105 | s64 b; | |
106 | ||
107 | /* Prefer a symbol with non zero length */ | |
108 | a = syma->end - syma->start; | |
109 | b = symb->end - symb->start; | |
110 | if ((b == 0) && (a > 0)) | |
111 | return SYMBOL_A; | |
112 | else if ((a == 0) && (b > 0)) | |
113 | return SYMBOL_B; | |
114 | ||
115 | /* Prefer a non weak symbol over a weak one */ | |
116 | a = syma->binding == STB_WEAK; | |
117 | b = symb->binding == STB_WEAK; | |
118 | if (b && !a) | |
119 | return SYMBOL_A; | |
120 | if (a && !b) | |
121 | return SYMBOL_B; | |
122 | ||
123 | /* Prefer a global symbol over a non global one */ | |
124 | a = syma->binding == STB_GLOBAL; | |
125 | b = symb->binding == STB_GLOBAL; | |
126 | if (a && !b) | |
127 | return SYMBOL_A; | |
128 | if (b && !a) | |
129 | return SYMBOL_B; | |
130 | ||
131 | /* Prefer a symbol with less underscores */ | |
132 | a = prefix_underscores_count(syma->name); | |
133 | b = prefix_underscores_count(symb->name); | |
134 | if (b > a) | |
135 | return SYMBOL_A; | |
136 | else if (a > b) | |
137 | return SYMBOL_B; | |
138 | ||
139 | /* If all else fails, choose the symbol with the longest name */ | |
140 | if (strlen(syma->name) >= strlen(symb->name)) | |
141 | return SYMBOL_A; | |
142 | else | |
143 | return SYMBOL_B; | |
144 | } | |
145 | ||
146 | static void symbols__fixup_duplicate(struct rb_root *symbols) | |
147 | { | |
148 | struct rb_node *nd; | |
149 | struct symbol *curr, *next; | |
150 | ||
151 | nd = rb_first(symbols); | |
152 | ||
153 | while (nd) { | |
154 | curr = rb_entry(nd, struct symbol, rb_node); | |
155 | again: | |
156 | nd = rb_next(&curr->rb_node); | |
157 | next = rb_entry(nd, struct symbol, rb_node); | |
158 | ||
159 | if (!nd) | |
160 | break; | |
161 | ||
162 | if (curr->start != next->start) | |
163 | continue; | |
164 | ||
165 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
166 | rb_erase(&next->rb_node, symbols); | |
167 | goto again; | |
168 | } else { | |
169 | nd = rb_next(&curr->rb_node); | |
170 | rb_erase(&curr->rb_node, symbols); | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
aeafcbaf | 175 | static void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 176 | { |
aeafcbaf | 177 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 178 | struct symbol *curr, *prev; |
af427bf5 ACM |
179 | |
180 | if (prevnd == NULL) | |
181 | return; | |
182 | ||
2e538c4a ACM |
183 | curr = rb_entry(prevnd, struct symbol, rb_node); |
184 | ||
af427bf5 | 185 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
186 | prev = curr; |
187 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 188 | |
3b01a413 | 189 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 190 | prev->end = curr->start - 1; |
af427bf5 | 191 | } |
2e538c4a ACM |
192 | |
193 | /* Last entry */ | |
194 | if (curr->end == curr->start) | |
195 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
196 | } |
197 | ||
aeafcbaf | 198 | static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
199 | { |
200 | struct map *prev, *curr; | |
aeafcbaf | 201 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
202 | |
203 | if (prevnd == NULL) | |
204 | return; | |
205 | ||
206 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
207 | |
208 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
209 | prev = curr; | |
210 | curr = rb_entry(nd, struct map, rb_node); | |
211 | prev->end = curr->start - 1; | |
2e538c4a | 212 | } |
90c83218 ACM |
213 | |
214 | /* | |
215 | * We still haven't the actual symbols, so guess the | |
216 | * last map final address. | |
217 | */ | |
9d1faba5 | 218 | curr->end = ~0ULL; |
af427bf5 ACM |
219 | } |
220 | ||
aeafcbaf | 221 | static void map_groups__fixup_end(struct map_groups *mg) |
23ea4a3f ACM |
222 | { |
223 | int i; | |
224 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf | 225 | __map_groups__fixup_end(mg, i); |
23ea4a3f ACM |
226 | } |
227 | ||
c408fedf ACM |
228 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
229 | const char *name) | |
a2928c42 | 230 | { |
0085c954 | 231 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
232 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
233 | sizeof(*sym) + namelen)); | |
234 | if (sym == NULL) | |
0b73da3f IM |
235 | return NULL; |
236 | ||
75be6cf4 | 237 | if (symbol_conf.priv_size) |
aeafcbaf | 238 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 239 | |
aeafcbaf ACM |
240 | sym->start = start; |
241 | sym->end = len ? start + len - 1 : start; | |
242 | sym->binding = binding; | |
243 | sym->namelen = namelen - 1; | |
e4204992 | 244 | |
aeafcbaf ACM |
245 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
246 | __func__, name, start, sym->end); | |
247 | memcpy(sym->name, name, namelen); | |
a2928c42 | 248 | |
aeafcbaf | 249 | return sym; |
a2928c42 ACM |
250 | } |
251 | ||
aeafcbaf | 252 | void symbol__delete(struct symbol *sym) |
a2928c42 | 253 | { |
aeafcbaf | 254 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
255 | } |
256 | ||
aeafcbaf | 257 | static size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 258 | { |
9486aa38 | 259 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
260 | sym->start, sym->end, |
261 | sym->binding == STB_GLOBAL ? 'g' : | |
262 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
263 | sym->name); | |
a2928c42 ACM |
264 | } |
265 | ||
547a92e0 AN |
266 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
267 | { | |
268 | const char *symname; | |
269 | ||
270 | if (sym && sym->name) | |
271 | symname = sym->name; | |
272 | else | |
273 | symname = "[unknown]"; | |
274 | ||
275 | return fprintf(fp, "%s", symname); | |
276 | } | |
277 | ||
aeafcbaf | 278 | void dso__set_long_name(struct dso *dso, char *name) |
cfc10d3b | 279 | { |
ef6ae724 ACM |
280 | if (name == NULL) |
281 | return; | |
aeafcbaf ACM |
282 | dso->long_name = name; |
283 | dso->long_name_len = strlen(name); | |
cfc10d3b ACM |
284 | } |
285 | ||
aeafcbaf | 286 | static void dso__set_short_name(struct dso *dso, const char *name) |
b63be8d7 ACM |
287 | { |
288 | if (name == NULL) | |
289 | return; | |
aeafcbaf ACM |
290 | dso->short_name = name; |
291 | dso->short_name_len = strlen(name); | |
b63be8d7 ACM |
292 | } |
293 | ||
aeafcbaf | 294 | static void dso__set_basename(struct dso *dso) |
cfc10d3b | 295 | { |
aeafcbaf | 296 | dso__set_short_name(dso, basename(dso->long_name)); |
cfc10d3b ACM |
297 | } |
298 | ||
00a192b3 | 299 | struct dso *dso__new(const char *name) |
a2928c42 | 300 | { |
aeafcbaf | 301 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
a2928c42 | 302 | |
aeafcbaf | 303 | if (dso != NULL) { |
6a4694a4 | 304 | int i; |
aeafcbaf ACM |
305 | strcpy(dso->name, name); |
306 | dso__set_long_name(dso, dso->name); | |
307 | dso__set_short_name(dso, dso->name); | |
6a4694a4 | 308 | for (i = 0; i < MAP__NR_TYPES; ++i) |
aeafcbaf ACM |
309 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; |
310 | dso->symtab_type = SYMTAB__NOT_FOUND; | |
311 | dso->loaded = 0; | |
312 | dso->sorted_by_name = 0; | |
313 | dso->has_build_id = 0; | |
314 | dso->kernel = DSO_TYPE_USER; | |
315 | INIT_LIST_HEAD(&dso->node); | |
a2928c42 ACM |
316 | } |
317 | ||
aeafcbaf | 318 | return dso; |
a2928c42 ACM |
319 | } |
320 | ||
aeafcbaf | 321 | static void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
322 | { |
323 | struct symbol *pos; | |
aeafcbaf | 324 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
325 | |
326 | while (next) { | |
327 | pos = rb_entry(next, struct symbol, rb_node); | |
328 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 329 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 330 | symbol__delete(pos); |
a2928c42 ACM |
331 | } |
332 | } | |
333 | ||
aeafcbaf | 334 | void dso__delete(struct dso *dso) |
a2928c42 | 335 | { |
6a4694a4 ACM |
336 | int i; |
337 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf ACM |
338 | symbols__delete(&dso->symbols[i]); |
339 | if (dso->sname_alloc) | |
340 | free((char *)dso->short_name); | |
341 | if (dso->lname_alloc) | |
342 | free(dso->long_name); | |
343 | free(dso); | |
a2928c42 ACM |
344 | } |
345 | ||
aeafcbaf | 346 | void dso__set_build_id(struct dso *dso, void *build_id) |
8d06367f | 347 | { |
aeafcbaf ACM |
348 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); |
349 | dso->has_build_id = 1; | |
8d06367f ACM |
350 | } |
351 | ||
aeafcbaf | 352 | static void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 353 | { |
aeafcbaf | 354 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 355 | struct rb_node *parent = NULL; |
9cffa8d5 | 356 | const u64 ip = sym->start; |
a2928c42 ACM |
357 | struct symbol *s; |
358 | ||
359 | while (*p != NULL) { | |
360 | parent = *p; | |
361 | s = rb_entry(parent, struct symbol, rb_node); | |
362 | if (ip < s->start) | |
363 | p = &(*p)->rb_left; | |
364 | else | |
365 | p = &(*p)->rb_right; | |
366 | } | |
367 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 368 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
369 | } |
370 | ||
aeafcbaf | 371 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
372 | { |
373 | struct rb_node *n; | |
374 | ||
aeafcbaf | 375 | if (symbols == NULL) |
a2928c42 ACM |
376 | return NULL; |
377 | ||
aeafcbaf | 378 | n = symbols->rb_node; |
a2928c42 ACM |
379 | |
380 | while (n) { | |
381 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
382 | ||
383 | if (ip < s->start) | |
384 | n = n->rb_left; | |
385 | else if (ip > s->end) | |
386 | n = n->rb_right; | |
387 | else | |
388 | return s; | |
389 | } | |
390 | ||
391 | return NULL; | |
392 | } | |
393 | ||
79406cd7 ACM |
394 | struct symbol_name_rb_node { |
395 | struct rb_node rb_node; | |
396 | struct symbol sym; | |
397 | }; | |
398 | ||
aeafcbaf | 399 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 400 | { |
aeafcbaf | 401 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 402 | struct rb_node *parent = NULL; |
02a9d037 RV |
403 | struct symbol_name_rb_node *symn, *s; |
404 | ||
405 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
406 | |
407 | while (*p != NULL) { | |
408 | parent = *p; | |
409 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
410 | if (strcmp(sym->name, s->sym.name) < 0) | |
411 | p = &(*p)->rb_left; | |
412 | else | |
413 | p = &(*p)->rb_right; | |
414 | } | |
415 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 416 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
417 | } |
418 | ||
aeafcbaf ACM |
419 | static void symbols__sort_by_name(struct rb_root *symbols, |
420 | struct rb_root *source) | |
79406cd7 ACM |
421 | { |
422 | struct rb_node *nd; | |
423 | ||
424 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
425 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 426 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
427 | } |
428 | } | |
429 | ||
aeafcbaf ACM |
430 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
431 | const char *name) | |
79406cd7 ACM |
432 | { |
433 | struct rb_node *n; | |
434 | ||
aeafcbaf | 435 | if (symbols == NULL) |
79406cd7 ACM |
436 | return NULL; |
437 | ||
aeafcbaf | 438 | n = symbols->rb_node; |
79406cd7 ACM |
439 | |
440 | while (n) { | |
441 | struct symbol_name_rb_node *s; | |
442 | int cmp; | |
443 | ||
444 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
445 | cmp = strcmp(name, s->sym.name); | |
446 | ||
447 | if (cmp < 0) | |
448 | n = n->rb_left; | |
449 | else if (cmp > 0) | |
450 | n = n->rb_right; | |
451 | else | |
452 | return &s->sym; | |
453 | } | |
454 | ||
455 | return NULL; | |
456 | } | |
457 | ||
aeafcbaf | 458 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 459 | enum map_type type, u64 addr) |
fcf1203a | 460 | { |
aeafcbaf | 461 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
462 | } |
463 | ||
aeafcbaf | 464 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
465 | const char *name) |
466 | { | |
aeafcbaf | 467 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
468 | } |
469 | ||
aeafcbaf | 470 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 471 | { |
aeafcbaf ACM |
472 | dso__set_sorted_by_name(dso, type); |
473 | return symbols__sort_by_name(&dso->symbol_names[type], | |
474 | &dso->symbols[type]); | |
79406cd7 ACM |
475 | } |
476 | ||
aeafcbaf | 477 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
a2928c42 | 478 | { |
8d06367f | 479 | char *bid = bf; |
aeafcbaf | 480 | const u8 *raw = build_id; |
8d06367f | 481 | int i; |
a2928c42 | 482 | |
8d06367f ACM |
483 | for (i = 0; i < len; ++i) { |
484 | sprintf(bid, "%02x", *raw); | |
485 | ++raw; | |
486 | bid += 2; | |
487 | } | |
488 | ||
aeafcbaf | 489 | return raw - build_id; |
8d06367f ACM |
490 | } |
491 | ||
aeafcbaf | 492 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
8d06367f ACM |
493 | { |
494 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f | 495 | |
aeafcbaf | 496 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
9e03eb2d ACM |
497 | return fprintf(fp, "%s", sbuild_id); |
498 | } | |
499 | ||
aeafcbaf ACM |
500 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
501 | enum map_type type, FILE *fp) | |
90f18e63 SD |
502 | { |
503 | size_t ret = 0; | |
504 | struct rb_node *nd; | |
505 | struct symbol_name_rb_node *pos; | |
506 | ||
aeafcbaf | 507 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
508 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
509 | fprintf(fp, "%s\n", pos->sym.name); | |
510 | } | |
511 | ||
512 | return ret; | |
513 | } | |
514 | ||
aeafcbaf | 515 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) |
9e03eb2d ACM |
516 | { |
517 | struct rb_node *nd; | |
aeafcbaf | 518 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); |
9e03eb2d | 519 | |
aeafcbaf ACM |
520 | if (dso->short_name != dso->long_name) |
521 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3846df2e | 522 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], |
aeafcbaf ACM |
523 | dso->loaded ? "" : "NOT "); |
524 | ret += dso__fprintf_buildid(dso, fp); | |
6a4694a4 | 525 | ret += fprintf(fp, ")\n"); |
aeafcbaf | 526 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { |
95011c60 ACM |
527 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
528 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
529 | } |
530 | ||
531 | return ret; | |
532 | } | |
533 | ||
9e201442 ACM |
534 | int kallsyms__parse(const char *filename, void *arg, |
535 | int (*process_symbol)(void *arg, const char *name, | |
3b01a413 | 536 | char type, u64 start, u64 end)) |
a2928c42 | 537 | { |
a2928c42 ACM |
538 | char *line = NULL; |
539 | size_t n; | |
3b01a413 | 540 | int err = -1; |
9e201442 | 541 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
542 | |
543 | if (file == NULL) | |
544 | goto out_failure; | |
545 | ||
3b01a413 ACM |
546 | err = 0; |
547 | ||
a2928c42 | 548 | while (!feof(file)) { |
9cffa8d5 | 549 | u64 start; |
a2928c42 ACM |
550 | int line_len, len; |
551 | char symbol_type; | |
2e538c4a | 552 | char *symbol_name; |
a2928c42 ACM |
553 | |
554 | line_len = getline(&line, &n, file); | |
a1645ce1 | 555 | if (line_len < 0 || !line) |
a2928c42 ACM |
556 | break; |
557 | ||
a2928c42 ACM |
558 | line[--line_len] = '\0'; /* \n */ |
559 | ||
a0055ae2 | 560 | len = hex2u64(line, &start); |
a2928c42 ACM |
561 | |
562 | len++; | |
563 | if (len + 2 >= line_len) | |
564 | continue; | |
565 | ||
31877908 | 566 | symbol_type = line[len]; |
3b01a413 ACM |
567 | len += 2; |
568 | symbol_name = line + len; | |
569 | len = line_len - len; | |
682b335a | 570 | |
3b01a413 ACM |
571 | if (len >= KSYM_NAME_LEN) { |
572 | err = -1; | |
682b335a | 573 | break; |
3b01a413 ACM |
574 | } |
575 | ||
3f5a4272 AB |
576 | /* |
577 | * module symbols are not sorted so we add all | |
578 | * symbols with zero length and rely on | |
579 | * symbols__fixup_end() to fix it up. | |
580 | */ | |
581 | err = process_symbol(arg, symbol_name, | |
582 | symbol_type, start, start); | |
583 | if (err) | |
584 | break; | |
2e538c4a ACM |
585 | } |
586 | ||
587 | free(line); | |
588 | fclose(file); | |
682b335a | 589 | return err; |
2e538c4a | 590 | |
2e538c4a ACM |
591 | out_failure: |
592 | return -1; | |
593 | } | |
594 | ||
682b335a ACM |
595 | struct process_kallsyms_args { |
596 | struct map *map; | |
597 | struct dso *dso; | |
598 | }; | |
599 | ||
c408fedf ACM |
600 | static u8 kallsyms2elf_type(char type) |
601 | { | |
602 | if (type == 'W') | |
603 | return STB_WEAK; | |
604 | ||
605 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
606 | } | |
607 | ||
682b335a | 608 | static int map__process_kallsym_symbol(void *arg, const char *name, |
3b01a413 | 609 | char type, u64 start, u64 end) |
682b335a ACM |
610 | { |
611 | struct symbol *sym; | |
612 | struct process_kallsyms_args *a = arg; | |
613 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
614 | ||
615 | if (!symbol_type__is_a(type, a->map->type)) | |
616 | return 0; | |
617 | ||
3b01a413 ACM |
618 | sym = symbol__new(start, end - start + 1, |
619 | kallsyms2elf_type(type), name); | |
682b335a ACM |
620 | if (sym == NULL) |
621 | return -ENOMEM; | |
622 | /* | |
623 | * We will pass the symbols to the filter later, in | |
624 | * map__split_kallsyms, when we have split the maps per module | |
625 | */ | |
626 | symbols__insert(root, sym); | |
a1645ce1 | 627 | |
682b335a ACM |
628 | return 0; |
629 | } | |
630 | ||
631 | /* | |
632 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
633 | * so that we can in the next step set the symbol ->end address and then | |
634 | * call kernel_maps__split_kallsyms. | |
635 | */ | |
aeafcbaf | 636 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 637 | struct map *map) |
682b335a | 638 | { |
aeafcbaf | 639 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 640 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
641 | } |
642 | ||
2e538c4a ACM |
643 | /* |
644 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
645 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
646 | * the original ELF section names vmlinux have. | |
647 | */ | |
aeafcbaf | 648 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 649 | symbol_filter_t filter) |
2e538c4a | 650 | { |
9de89fe7 | 651 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 652 | struct machine *machine = kmaps->machine; |
4e06255f | 653 | struct map *curr_map = map; |
2e538c4a | 654 | struct symbol *pos; |
8a953312 | 655 | int count = 0, moved = 0; |
aeafcbaf | 656 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 657 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
658 | int kernel_range = 0; |
659 | ||
660 | while (next) { | |
661 | char *module; | |
662 | ||
663 | pos = rb_entry(next, struct symbol, rb_node); | |
664 | next = rb_next(&pos->rb_node); | |
665 | ||
666 | module = strchr(pos->name, '\t'); | |
667 | if (module) { | |
75be6cf4 | 668 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
669 | goto discard_symbol; |
670 | ||
2e538c4a ACM |
671 | *module++ = '\0'; |
672 | ||
b7cece76 | 673 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 674 | if (curr_map != map && |
aeafcbaf | 675 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 676 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
677 | /* |
678 | * We assume all symbols of a module are | |
679 | * continuous in * kallsyms, so curr_map | |
680 | * points to a module and all its | |
681 | * symbols are in its kmap. Mark it as | |
682 | * loaded. | |
683 | */ | |
684 | dso__set_loaded(curr_map->dso, | |
685 | curr_map->type); | |
686 | } | |
687 | ||
688 | curr_map = map_groups__find_by_name(kmaps, | |
689 | map->type, module); | |
4e06255f | 690 | if (curr_map == NULL) { |
2f51903b | 691 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 692 | "inconsistency while looking " |
a1645ce1 | 693 | "for \"%s\" module!\n", |
23346f21 | 694 | machine->root_dir, module); |
a1645ce1 ZY |
695 | curr_map = map; |
696 | goto discard_symbol; | |
af427bf5 | 697 | } |
b7cece76 | 698 | |
a1645ce1 | 699 | if (curr_map->dso->loaded && |
23346f21 | 700 | !machine__is_default_guest(machine)) |
b7cece76 | 701 | goto discard_symbol; |
af427bf5 | 702 | } |
2e538c4a ACM |
703 | /* |
704 | * So that we look just like we get from .ko files, | |
705 | * i.e. not prelinked, relative to map->start. | |
706 | */ | |
4e06255f ACM |
707 | pos->start = curr_map->map_ip(curr_map, pos->start); |
708 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
709 | } else if (curr_map != map) { | |
2e538c4a | 710 | char dso_name[PATH_MAX]; |
aeafcbaf | 711 | struct dso *ndso; |
2e538c4a | 712 | |
8a953312 ACM |
713 | if (count == 0) { |
714 | curr_map = map; | |
715 | goto filter_symbol; | |
716 | } | |
717 | ||
aeafcbaf | 718 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
719 | snprintf(dso_name, sizeof(dso_name), |
720 | "[guest.kernel].%d", | |
721 | kernel_range++); | |
722 | else | |
723 | snprintf(dso_name, sizeof(dso_name), | |
724 | "[kernel].%d", | |
725 | kernel_range++); | |
2e538c4a | 726 | |
aeafcbaf ACM |
727 | ndso = dso__new(dso_name); |
728 | if (ndso == NULL) | |
2e538c4a ACM |
729 | return -1; |
730 | ||
aeafcbaf | 731 | ndso->kernel = dso->kernel; |
a1645ce1 | 732 | |
aeafcbaf | 733 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 734 | if (curr_map == NULL) { |
aeafcbaf | 735 | dso__delete(ndso); |
2e538c4a ACM |
736 | return -1; |
737 | } | |
a2928c42 | 738 | |
4e06255f | 739 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 740 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
741 | ++kernel_range; |
742 | } | |
8a953312 | 743 | filter_symbol: |
4e06255f | 744 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 745 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 746 | symbol__delete(pos); |
2e538c4a | 747 | } else { |
4e06255f ACM |
748 | if (curr_map != map) { |
749 | rb_erase(&pos->rb_node, root); | |
750 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
751 | ++moved; |
752 | } else | |
753 | ++count; | |
9974f496 | 754 | } |
a2928c42 ACM |
755 | } |
756 | ||
a1645ce1 | 757 | if (curr_map != map && |
aeafcbaf | 758 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 759 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
760 | dso__set_loaded(curr_map->dso, curr_map->type); |
761 | } | |
762 | ||
8a953312 | 763 | return count + moved; |
2e538c4a | 764 | } |
a2928c42 | 765 | |
ec80fde7 ACM |
766 | static bool symbol__restricted_filename(const char *filename, |
767 | const char *restricted_filename) | |
768 | { | |
769 | bool restricted = false; | |
770 | ||
771 | if (symbol_conf.kptr_restrict) { | |
772 | char *r = realpath(filename, NULL); | |
773 | ||
774 | if (r != NULL) { | |
775 | restricted = strcmp(r, restricted_filename) == 0; | |
776 | free(r); | |
777 | return restricted; | |
778 | } | |
779 | } | |
780 | ||
781 | return restricted; | |
782 | } | |
783 | ||
aeafcbaf | 784 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 785 | struct map *map, symbol_filter_t filter) |
2e538c4a | 786 | { |
ec80fde7 ACM |
787 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
788 | return -1; | |
789 | ||
aeafcbaf | 790 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
791 | return -1; |
792 | ||
694bf407 | 793 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
794 | symbols__fixup_end(&dso->symbols[map->type]); |
795 | ||
aeafcbaf ACM |
796 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
797 | dso->symtab_type = SYMTAB__GUEST_KALLSYMS; | |
a1645ce1 | 798 | else |
aeafcbaf | 799 | dso->symtab_type = SYMTAB__KALLSYMS; |
2e538c4a | 800 | |
aeafcbaf | 801 | return dso__split_kallsyms(dso, map, filter); |
af427bf5 ACM |
802 | } |
803 | ||
aeafcbaf | 804 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 805 | symbol_filter_t filter) |
80d496be PE |
806 | { |
807 | char *line = NULL; | |
808 | size_t n; | |
809 | FILE *file; | |
810 | int nr_syms = 0; | |
811 | ||
aeafcbaf | 812 | file = fopen(dso->long_name, "r"); |
80d496be PE |
813 | if (file == NULL) |
814 | goto out_failure; | |
815 | ||
816 | while (!feof(file)) { | |
9cffa8d5 | 817 | u64 start, size; |
80d496be PE |
818 | struct symbol *sym; |
819 | int line_len, len; | |
820 | ||
821 | line_len = getline(&line, &n, file); | |
822 | if (line_len < 0) | |
823 | break; | |
824 | ||
825 | if (!line) | |
826 | goto out_failure; | |
827 | ||
828 | line[--line_len] = '\0'; /* \n */ | |
829 | ||
830 | len = hex2u64(line, &start); | |
831 | ||
832 | len++; | |
833 | if (len + 2 >= line_len) | |
834 | continue; | |
835 | ||
836 | len += hex2u64(line + len, &size); | |
837 | ||
838 | len++; | |
839 | if (len + 2 >= line_len) | |
840 | continue; | |
841 | ||
c408fedf | 842 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
843 | |
844 | if (sym == NULL) | |
845 | goto out_delete_line; | |
846 | ||
439d473b | 847 | if (filter && filter(map, sym)) |
00a192b3 | 848 | symbol__delete(sym); |
80d496be | 849 | else { |
aeafcbaf | 850 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
851 | nr_syms++; |
852 | } | |
853 | } | |
854 | ||
855 | free(line); | |
856 | fclose(file); | |
857 | ||
858 | return nr_syms; | |
859 | ||
860 | out_delete_line: | |
861 | free(line); | |
862 | out_failure: | |
863 | return -1; | |
864 | } | |
865 | ||
a2928c42 ACM |
866 | /** |
867 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
868 | * | |
aeafcbaf | 869 | * @syms: struct elf_symtab instance to iterate |
83a0944f | 870 | * @idx: uint32_t idx |
a2928c42 ACM |
871 | * @sym: GElf_Sym iterator |
872 | */ | |
83a0944f IM |
873 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
874 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
875 | idx < nr_syms; \ | |
876 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
877 | |
878 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
879 | { | |
880 | return GELF_ST_TYPE(sym->st_info); | |
881 | } | |
882 | ||
883 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
884 | { | |
885 | return elf_sym__type(sym) == STT_FUNC && | |
886 | sym->st_name != 0 && | |
81833130 | 887 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
888 | } |
889 | ||
f1dfa0b1 ACM |
890 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
891 | { | |
892 | return elf_sym__type(sym) == STT_OBJECT && | |
893 | sym->st_name != 0 && | |
894 | sym->st_shndx != SHN_UNDEF; | |
895 | } | |
896 | ||
6cfcc53e MG |
897 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
898 | { | |
899 | return elf_sym__type(sym) == STT_NOTYPE && | |
900 | sym->st_name != 0 && | |
901 | sym->st_shndx != SHN_UNDEF && | |
902 | sym->st_shndx != SHN_ABS; | |
903 | } | |
904 | ||
905 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
906 | const Elf_Data *secstrs) | |
907 | { | |
908 | return secstrs->d_buf + shdr->sh_name; | |
909 | } | |
910 | ||
911 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
912 | const Elf_Data *secstrs) | |
913 | { | |
914 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
915 | } | |
916 | ||
f1dfa0b1 ACM |
917 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
918 | const Elf_Data *secstrs) | |
919 | { | |
920 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
921 | } | |
922 | ||
a2928c42 ACM |
923 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
924 | const Elf_Data *symstrs) | |
925 | { | |
926 | return symstrs->d_buf + sym->st_name; | |
927 | } | |
928 | ||
929 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
930 | GElf_Shdr *shp, const char *name, | |
83a0944f | 931 | size_t *idx) |
a2928c42 ACM |
932 | { |
933 | Elf_Scn *sec = NULL; | |
934 | size_t cnt = 1; | |
935 | ||
936 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
937 | char *str; | |
938 | ||
939 | gelf_getshdr(sec, shp); | |
940 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
941 | if (!strcmp(name, str)) { | |
83a0944f IM |
942 | if (idx) |
943 | *idx = cnt; | |
a2928c42 ACM |
944 | break; |
945 | } | |
946 | ++cnt; | |
947 | } | |
948 | ||
949 | return sec; | |
950 | } | |
951 | ||
8ce998d6 ACM |
952 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
953 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
954 | idx < nr_entries; \ | |
955 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
956 | ||
957 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
958 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
959 | idx < nr_entries; \ | |
960 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
961 | ||
a25e46c4 ACM |
962 | /* |
963 | * We need to check if we have a .dynsym, so that we can handle the | |
964 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
965 | * .dynsym or .symtab). | |
966 | * And always look at the original dso, not at debuginfo packages, that | |
967 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
968 | */ | |
aeafcbaf | 969 | static int dso__synthesize_plt_symbols(struct dso *dso, struct map *map, |
82164161 | 970 | symbol_filter_t filter) |
8ce998d6 ACM |
971 | { |
972 | uint32_t nr_rel_entries, idx; | |
973 | GElf_Sym sym; | |
9cffa8d5 | 974 | u64 plt_offset; |
8ce998d6 ACM |
975 | GElf_Shdr shdr_plt; |
976 | struct symbol *f; | |
a25e46c4 | 977 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 978 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
979 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
980 | size_t dynsym_idx; | |
981 | GElf_Ehdr ehdr; | |
8ce998d6 | 982 | char sympltname[1024]; |
a25e46c4 ACM |
983 | Elf *elf; |
984 | int nr = 0, symidx, fd, err = 0; | |
ec5761ea | 985 | char name[PATH_MAX]; |
a25e46c4 | 986 | |
ec5761ea | 987 | snprintf(name, sizeof(name), "%s%s", |
aeafcbaf | 988 | symbol_conf.symfs, dso->long_name); |
ec5761ea | 989 | fd = open(name, O_RDONLY); |
a25e46c4 ACM |
990 | if (fd < 0) |
991 | goto out; | |
992 | ||
84087126 | 993 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
994 | if (elf == NULL) |
995 | goto out_close; | |
996 | ||
997 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
998 | goto out_elf_end; | |
999 | ||
1000 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
1001 | ".dynsym", &dynsym_idx); | |
1002 | if (scn_dynsym == NULL) | |
1003 | goto out_elf_end; | |
8ce998d6 | 1004 | |
a25e46c4 | 1005 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
1006 | ".rela.plt", NULL); |
1007 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 1008 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
1009 | ".rel.plt", NULL); |
1010 | if (scn_plt_rel == NULL) | |
a25e46c4 | 1011 | goto out_elf_end; |
8ce998d6 ACM |
1012 | } |
1013 | ||
a25e46c4 ACM |
1014 | err = -1; |
1015 | ||
8ce998d6 | 1016 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 1017 | goto out_elf_end; |
8ce998d6 | 1018 | |
a25e46c4 ACM |
1019 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
1020 | goto out_elf_end; | |
8ce998d6 ACM |
1021 | |
1022 | /* | |
83a0944f | 1023 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
1024 | * and the symbols in the .dynsym they refer to. |
1025 | */ | |
1026 | reldata = elf_getdata(scn_plt_rel, NULL); | |
1027 | if (reldata == NULL) | |
a25e46c4 | 1028 | goto out_elf_end; |
8ce998d6 ACM |
1029 | |
1030 | syms = elf_getdata(scn_dynsym, NULL); | |
1031 | if (syms == NULL) | |
a25e46c4 | 1032 | goto out_elf_end; |
8ce998d6 | 1033 | |
a25e46c4 | 1034 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 1035 | if (scn_symstrs == NULL) |
a25e46c4 | 1036 | goto out_elf_end; |
8ce998d6 ACM |
1037 | |
1038 | symstrs = elf_getdata(scn_symstrs, NULL); | |
1039 | if (symstrs == NULL) | |
a25e46c4 | 1040 | goto out_elf_end; |
8ce998d6 ACM |
1041 | |
1042 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
1043 | plt_offset = shdr_plt.sh_offset; | |
1044 | ||
1045 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
1046 | GElf_Rela pos_mem, *pos; | |
1047 | ||
1048 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
1049 | nr_rel_entries) { | |
1050 | symidx = GELF_R_SYM(pos->r_info); | |
1051 | plt_offset += shdr_plt.sh_entsize; | |
1052 | gelf_getsym(syms, symidx, &sym); | |
1053 | snprintf(sympltname, sizeof(sympltname), | |
1054 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1055 | ||
1056 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1057 | STB_GLOBAL, sympltname); |
8ce998d6 | 1058 | if (!f) |
a25e46c4 | 1059 | goto out_elf_end; |
8ce998d6 | 1060 | |
82164161 ACM |
1061 | if (filter && filter(map, f)) |
1062 | symbol__delete(f); | |
1063 | else { | |
aeafcbaf | 1064 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1065 | ++nr; |
1066 | } | |
8ce998d6 ACM |
1067 | } |
1068 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
1069 | GElf_Rel pos_mem, *pos; | |
1070 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
1071 | nr_rel_entries) { | |
1072 | symidx = GELF_R_SYM(pos->r_info); | |
1073 | plt_offset += shdr_plt.sh_entsize; | |
1074 | gelf_getsym(syms, symidx, &sym); | |
1075 | snprintf(sympltname, sizeof(sympltname), | |
1076 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1077 | ||
1078 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1079 | STB_GLOBAL, sympltname); |
8ce998d6 | 1080 | if (!f) |
a25e46c4 | 1081 | goto out_elf_end; |
8ce998d6 | 1082 | |
82164161 ACM |
1083 | if (filter && filter(map, f)) |
1084 | symbol__delete(f); | |
1085 | else { | |
aeafcbaf | 1086 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1087 | ++nr; |
1088 | } | |
8ce998d6 | 1089 | } |
8ce998d6 ACM |
1090 | } |
1091 | ||
a25e46c4 ACM |
1092 | err = 0; |
1093 | out_elf_end: | |
1094 | elf_end(elf); | |
1095 | out_close: | |
1096 | close(fd); | |
1097 | ||
1098 | if (err == 0) | |
1099 | return nr; | |
1100 | out: | |
fe2197b8 | 1101 | pr_debug("%s: problems reading %s PLT info.\n", |
aeafcbaf | 1102 | __func__, dso->long_name); |
a25e46c4 | 1103 | return 0; |
8ce998d6 ACM |
1104 | } |
1105 | ||
aeafcbaf | 1106 | static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type) |
d45868d3 ACM |
1107 | { |
1108 | switch (type) { | |
1109 | case MAP__FUNCTION: | |
aeafcbaf | 1110 | return elf_sym__is_function(sym); |
f1dfa0b1 | 1111 | case MAP__VARIABLE: |
aeafcbaf | 1112 | return elf_sym__is_object(sym); |
d45868d3 ACM |
1113 | default: |
1114 | return false; | |
1115 | } | |
1116 | } | |
1117 | ||
aeafcbaf ACM |
1118 | static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs, |
1119 | enum map_type type) | |
d45868d3 ACM |
1120 | { |
1121 | switch (type) { | |
1122 | case MAP__FUNCTION: | |
aeafcbaf | 1123 | return elf_sec__is_text(shdr, secstrs); |
f1dfa0b1 | 1124 | case MAP__VARIABLE: |
aeafcbaf | 1125 | return elf_sec__is_data(shdr, secstrs); |
d45868d3 ACM |
1126 | default: |
1127 | return false; | |
1128 | } | |
1129 | } | |
1130 | ||
70c3856b EM |
1131 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
1132 | { | |
1133 | Elf_Scn *sec = NULL; | |
1134 | GElf_Shdr shdr; | |
1135 | size_t cnt = 1; | |
1136 | ||
1137 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
1138 | gelf_getshdr(sec, &shdr); | |
1139 | ||
1140 | if ((addr >= shdr.sh_addr) && | |
1141 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
1142 | return cnt; | |
1143 | ||
1144 | ++cnt; | |
1145 | } | |
1146 | ||
1147 | return -1; | |
1148 | } | |
1149 | ||
aeafcbaf | 1150 | static int dso__load_sym(struct dso *dso, struct map *map, const char *name, |
6da80ce8 DM |
1151 | int fd, symbol_filter_t filter, int kmodule, |
1152 | int want_symtab) | |
a2928c42 | 1153 | { |
aeafcbaf | 1154 | struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL; |
2e538c4a | 1155 | struct map *curr_map = map; |
aeafcbaf | 1156 | struct dso *curr_dso = dso; |
6cfcc53e | 1157 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1158 | uint32_t nr_syms; |
1159 | int err = -1; | |
83a0944f | 1160 | uint32_t idx; |
a2928c42 | 1161 | GElf_Ehdr ehdr; |
70c3856b EM |
1162 | GElf_Shdr shdr, opdshdr; |
1163 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1164 | GElf_Sym sym; |
70c3856b | 1165 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1166 | Elf *elf; |
439d473b | 1167 | int nr = 0; |
70c3856b | 1168 | size_t opdidx = 0; |
a2928c42 | 1169 | |
84087126 | 1170 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1171 | if (elf == NULL) { |
8b1389ef | 1172 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1173 | goto out_close; |
1174 | } | |
1175 | ||
1176 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1177 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1178 | goto out_elf_end; |
1179 | } | |
1180 | ||
6da80ce8 | 1181 | /* Always reject images with a mismatched build-id: */ |
aeafcbaf | 1182 | if (dso->has_build_id) { |
21916c38 DM |
1183 | u8 build_id[BUILD_ID_SIZE]; |
1184 | ||
be96ea8f | 1185 | if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0) |
21916c38 DM |
1186 | goto out_elf_end; |
1187 | ||
aeafcbaf | 1188 | if (!dso__build_id_equal(dso, build_id)) |
21916c38 DM |
1189 | goto out_elf_end; |
1190 | } | |
1191 | ||
a2928c42 | 1192 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1193 | if (sec == NULL) { |
6da80ce8 DM |
1194 | if (want_symtab) |
1195 | goto out_elf_end; | |
1196 | ||
a25e46c4 ACM |
1197 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1198 | if (sec == NULL) | |
8ce998d6 | 1199 | goto out_elf_end; |
8ce998d6 | 1200 | } |
a2928c42 | 1201 | |
70c3856b | 1202 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
adb09184 AB |
1203 | if (opdshdr.sh_type != SHT_PROGBITS) |
1204 | opdsec = NULL; | |
70c3856b EM |
1205 | if (opdsec) |
1206 | opddata = elf_rawdata(opdsec, NULL); | |
1207 | ||
a2928c42 ACM |
1208 | syms = elf_getdata(sec, NULL); |
1209 | if (syms == NULL) | |
1210 | goto out_elf_end; | |
1211 | ||
1212 | sec = elf_getscn(elf, shdr.sh_link); | |
1213 | if (sec == NULL) | |
1214 | goto out_elf_end; | |
1215 | ||
1216 | symstrs = elf_getdata(sec, NULL); | |
1217 | if (symstrs == NULL) | |
1218 | goto out_elf_end; | |
1219 | ||
6cfcc53e MG |
1220 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1221 | if (sec_strndx == NULL) | |
1222 | goto out_elf_end; | |
1223 | ||
1224 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1225 | if (secstrs == NULL) |
6cfcc53e MG |
1226 | goto out_elf_end; |
1227 | ||
a2928c42 ACM |
1228 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1229 | ||
e9fbc9dc | 1230 | memset(&sym, 0, sizeof(sym)); |
aeafcbaf ACM |
1231 | if (dso->kernel == DSO_TYPE_USER) { |
1232 | dso->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
1233 | elf_section_by_name(elf, &ehdr, &shdr, |
1234 | ".gnu.prelink_undo", | |
1235 | NULL) != NULL); | |
aeafcbaf ACM |
1236 | } else { |
1237 | dso->adjust_symbols = 0; | |
1238 | } | |
83a0944f | 1239 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1240 | struct symbol *f; |
56b03f3c | 1241 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1242 | char *demangled = NULL; |
6cfcc53e MG |
1243 | int is_label = elf_sym__is_label(&sym); |
1244 | const char *section_name; | |
a2928c42 | 1245 | |
9de89fe7 ACM |
1246 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1247 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1248 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1249 | |
d45868d3 | 1250 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1251 | continue; |
1252 | ||
696b97a5 DM |
1253 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1254 | * don't identify functions, so will confuse the profile | |
1255 | * output: */ | |
1256 | if (ehdr.e_machine == EM_ARM) { | |
1257 | if (!strcmp(elf_name, "$a") || | |
1258 | !strcmp(elf_name, "$d") || | |
1259 | !strcmp(elf_name, "$t")) | |
1260 | continue; | |
1261 | } | |
1262 | ||
70c3856b EM |
1263 | if (opdsec && sym.st_shndx == opdidx) { |
1264 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1265 | u64 *opd = opddata->d_buf + offset; | |
1266 | sym.st_value = *opd; | |
1267 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1268 | } | |
1269 | ||
a2928c42 ACM |
1270 | sec = elf_getscn(elf, sym.st_shndx); |
1271 | if (!sec) | |
1272 | goto out_elf_end; | |
1273 | ||
1274 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1275 | |
d45868d3 | 1276 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1277 | continue; |
1278 | ||
1279 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1280 | |
b2f8fb23 DDAG |
1281 | /* On ARM, symbols for thumb functions have 1 added to |
1282 | * the symbol address as a flag - remove it */ | |
1283 | if ((ehdr.e_machine == EM_ARM) && | |
1284 | (map->type == MAP__FUNCTION) && | |
1285 | (sym.st_value & 1)) | |
1286 | --sym.st_value; | |
1287 | ||
aeafcbaf | 1288 | if (dso->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1289 | char dso_name[PATH_MAX]; |
1290 | ||
1291 | if (strcmp(section_name, | |
b63be8d7 | 1292 | (curr_dso->short_name + |
aeafcbaf | 1293 | dso->short_name_len)) == 0) |
2e538c4a ACM |
1294 | goto new_symbol; |
1295 | ||
1296 | if (strcmp(section_name, ".text") == 0) { | |
1297 | curr_map = map; | |
aeafcbaf | 1298 | curr_dso = dso; |
2e538c4a ACM |
1299 | goto new_symbol; |
1300 | } | |
1301 | ||
1302 | snprintf(dso_name, sizeof(dso_name), | |
aeafcbaf | 1303 | "%s%s", dso->short_name, section_name); |
2e538c4a | 1304 | |
9de89fe7 | 1305 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1306 | if (curr_map == NULL) { |
1307 | u64 start = sym.st_value; | |
1308 | ||
1309 | if (kmodule) | |
1310 | start += map->start + shdr.sh_offset; | |
1311 | ||
00a192b3 | 1312 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1313 | if (curr_dso == NULL) |
1314 | goto out_elf_end; | |
aeafcbaf ACM |
1315 | curr_dso->kernel = dso->kernel; |
1316 | curr_dso->long_name = dso->long_name; | |
1317 | curr_dso->long_name_len = dso->long_name_len; | |
3610583c | 1318 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1319 | map->type); |
2e538c4a ACM |
1320 | if (curr_map == NULL) { |
1321 | dso__delete(curr_dso); | |
1322 | goto out_elf_end; | |
1323 | } | |
ed52ce2e ACM |
1324 | curr_map->map_ip = identity__map_ip; |
1325 | curr_map->unmap_ip = identity__map_ip; | |
aeafcbaf | 1326 | curr_dso->symtab_type = dso->symtab_type; |
9de89fe7 | 1327 | map_groups__insert(kmap->kmaps, curr_map); |
aeafcbaf | 1328 | dsos__add(&dso->node, curr_dso); |
6275ce2d | 1329 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1330 | } else |
1331 | curr_dso = curr_map->dso; | |
1332 | ||
1333 | goto new_symbol; | |
af427bf5 ACM |
1334 | } |
1335 | ||
2e538c4a | 1336 | if (curr_dso->adjust_symbols) { |
9486aa38 ACM |
1337 | pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " " |
1338 | "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__, | |
29a9f66d ACM |
1339 | (u64)sym.st_value, (u64)shdr.sh_addr, |
1340 | (u64)shdr.sh_offset); | |
f5812a7a | 1341 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1342 | } |
28ac909b ACM |
1343 | /* |
1344 | * We need to figure out if the object was created from C++ sources | |
1345 | * DWARF DW_compile_unit has this, but we don't always have access | |
1346 | * to it... | |
1347 | */ | |
83a0944f | 1348 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1349 | if (demangled != NULL) |
83a0944f | 1350 | elf_name = demangled; |
2e538c4a | 1351 | new_symbol: |
c408fedf ACM |
1352 | f = symbol__new(sym.st_value, sym.st_size, |
1353 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1354 | free(demangled); |
a2928c42 ACM |
1355 | if (!f) |
1356 | goto out_elf_end; | |
1357 | ||
2e538c4a | 1358 | if (filter && filter(curr_map, f)) |
00a192b3 | 1359 | symbol__delete(f); |
69ee69f6 | 1360 | else { |
6a4694a4 | 1361 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1362 | nr++; |
1363 | } | |
a2928c42 ACM |
1364 | } |
1365 | ||
2e538c4a ACM |
1366 | /* |
1367 | * For misannotated, zeroed, ASM function sizes. | |
1368 | */ | |
6275ce2d | 1369 | if (nr > 0) { |
694bf407 | 1370 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
aeafcbaf | 1371 | symbols__fixup_end(&dso->symbols[map->type]); |
6275ce2d ACM |
1372 | if (kmap) { |
1373 | /* | |
1374 | * We need to fixup this here too because we create new | |
1375 | * maps here, for things like vsyscall sections. | |
1376 | */ | |
1377 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1378 | } | |
1379 | } | |
a2928c42 ACM |
1380 | err = nr; |
1381 | out_elf_end: | |
1382 | elf_end(elf); | |
1383 | out_close: | |
1384 | return err; | |
1385 | } | |
1386 | ||
aeafcbaf | 1387 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id) |
78075caa | 1388 | { |
aeafcbaf | 1389 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; |
78075caa ACM |
1390 | } |
1391 | ||
a1645ce1 | 1392 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1393 | { |
e30a3d12 | 1394 | bool have_build_id = false; |
57f395a7 FW |
1395 | struct dso *pos; |
1396 | ||
6122e4e4 ACM |
1397 | list_for_each_entry(pos, head, node) { |
1398 | if (with_hits && !pos->hit) | |
1399 | continue; | |
f6e1467d ACM |
1400 | if (pos->has_build_id) { |
1401 | have_build_id = true; | |
1402 | continue; | |
1403 | } | |
e30a3d12 ACM |
1404 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1405 | sizeof(pos->build_id)) > 0) { | |
1406 | have_build_id = true; | |
1407 | pos->has_build_id = true; | |
1408 | } | |
6122e4e4 | 1409 | } |
57f395a7 | 1410 | |
e30a3d12 | 1411 | return have_build_id; |
57f395a7 FW |
1412 | } |
1413 | ||
fd7a346e ACM |
1414 | /* |
1415 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1416 | */ | |
1417 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1418 | ||
21916c38 | 1419 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1420 | { |
21916c38 | 1421 | int err = -1; |
4d1e00a8 ACM |
1422 | GElf_Ehdr ehdr; |
1423 | GElf_Shdr shdr; | |
fd7a346e | 1424 | Elf_Data *data; |
4d1e00a8 | 1425 | Elf_Scn *sec; |
e57cfcda | 1426 | Elf_Kind ek; |
fd7a346e | 1427 | void *ptr; |
4d1e00a8 | 1428 | |
2643ce11 ACM |
1429 | if (size < BUILD_ID_SIZE) |
1430 | goto out; | |
1431 | ||
e57cfcda PE |
1432 | ek = elf_kind(elf); |
1433 | if (ek != ELF_K_ELF) | |
21916c38 | 1434 | goto out; |
e57cfcda | 1435 | |
4d1e00a8 | 1436 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1437 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1438 | goto out; |
4d1e00a8 ACM |
1439 | } |
1440 | ||
2643ce11 ACM |
1441 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1442 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1443 | if (sec == NULL) { |
1444 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1445 | ".notes", NULL); | |
1446 | if (sec == NULL) | |
21916c38 | 1447 | goto out; |
fd7a346e | 1448 | } |
4d1e00a8 | 1449 | |
fd7a346e ACM |
1450 | data = elf_getdata(sec, NULL); |
1451 | if (data == NULL) | |
21916c38 | 1452 | goto out; |
fd7a346e ACM |
1453 | |
1454 | ptr = data->d_buf; | |
1455 | while (ptr < (data->d_buf + data->d_size)) { | |
1456 | GElf_Nhdr *nhdr = ptr; | |
be96ea8f SE |
1457 | size_t namesz = NOTE_ALIGN(nhdr->n_namesz), |
1458 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
fd7a346e ACM |
1459 | const char *name; |
1460 | ||
1461 | ptr += sizeof(*nhdr); | |
1462 | name = ptr; | |
1463 | ptr += namesz; | |
1464 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1465 | nhdr->n_namesz == sizeof("GNU")) { | |
1466 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1467 | size_t sz = min(size, descsz); |
1468 | memcpy(bf, ptr, sz); | |
1469 | memset(bf + sz, 0, size - sz); | |
1470 | err = descsz; | |
fd7a346e ACM |
1471 | break; |
1472 | } | |
1473 | } | |
1474 | ptr += descsz; | |
1475 | } | |
21916c38 DM |
1476 | |
1477 | out: | |
1478 | return err; | |
1479 | } | |
1480 | ||
1481 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1482 | { | |
1483 | int fd, err = -1; | |
1484 | Elf *elf; | |
1485 | ||
1486 | if (size < BUILD_ID_SIZE) | |
1487 | goto out; | |
1488 | ||
1489 | fd = open(filename, O_RDONLY); | |
1490 | if (fd < 0) | |
1491 | goto out; | |
1492 | ||
1493 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1494 | if (elf == NULL) { | |
1495 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1496 | goto out_close; | |
1497 | } | |
1498 | ||
1499 | err = elf_read_build_id(elf, bf, size); | |
1500 | ||
2643ce11 ACM |
1501 | elf_end(elf); |
1502 | out_close: | |
1503 | close(fd); | |
1504 | out: | |
1505 | return err; | |
1506 | } | |
1507 | ||
f1617b40 ACM |
1508 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1509 | { | |
1510 | int fd, err = -1; | |
1511 | ||
1512 | if (size < BUILD_ID_SIZE) | |
1513 | goto out; | |
1514 | ||
1515 | fd = open(filename, O_RDONLY); | |
1516 | if (fd < 0) | |
1517 | goto out; | |
1518 | ||
1519 | while (1) { | |
1520 | char bf[BUFSIZ]; | |
1521 | GElf_Nhdr nhdr; | |
be96ea8f | 1522 | size_t namesz, descsz; |
f1617b40 ACM |
1523 | |
1524 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1525 | break; | |
1526 | ||
fd7a346e ACM |
1527 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1528 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1529 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1530 | nhdr.n_namesz == sizeof("GNU")) { | |
be96ea8f | 1531 | if (read(fd, bf, namesz) != (ssize_t)namesz) |
f1617b40 ACM |
1532 | break; |
1533 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1534 | size_t sz = min(descsz, size); |
1535 | if (read(fd, build_id, sz) == (ssize_t)sz) { | |
1536 | memset(build_id + sz, 0, size - sz); | |
f1617b40 ACM |
1537 | err = 0; |
1538 | break; | |
1539 | } | |
be96ea8f | 1540 | } else if (read(fd, bf, descsz) != (ssize_t)descsz) |
f1617b40 ACM |
1541 | break; |
1542 | } else { | |
1543 | int n = namesz + descsz; | |
1544 | if (read(fd, bf, n) != n) | |
1545 | break; | |
1546 | } | |
1547 | } | |
1548 | close(fd); | |
1549 | out: | |
1550 | return err; | |
1551 | } | |
1552 | ||
aeafcbaf | 1553 | char dso__symtab_origin(const struct dso *dso) |
94cb9e38 ACM |
1554 | { |
1555 | static const char origin[] = { | |
878b439d ACM |
1556 | [SYMTAB__KALLSYMS] = 'k', |
1557 | [SYMTAB__JAVA_JIT] = 'j', | |
1558 | [SYMTAB__BUILD_ID_CACHE] = 'B', | |
1559 | [SYMTAB__FEDORA_DEBUGINFO] = 'f', | |
1560 | [SYMTAB__UBUNTU_DEBUGINFO] = 'u', | |
1561 | [SYMTAB__BUILDID_DEBUGINFO] = 'b', | |
1562 | [SYMTAB__SYSTEM_PATH_DSO] = 'd', | |
1563 | [SYMTAB__SYSTEM_PATH_KMODULE] = 'K', | |
1564 | [SYMTAB__GUEST_KALLSYMS] = 'g', | |
1565 | [SYMTAB__GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1566 | }; |
1567 | ||
aeafcbaf | 1568 | if (dso == NULL || dso->symtab_type == SYMTAB__NOT_FOUND) |
94cb9e38 | 1569 | return '!'; |
aeafcbaf | 1570 | return origin[dso->symtab_type]; |
94cb9e38 ACM |
1571 | } |
1572 | ||
aeafcbaf | 1573 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1574 | { |
4d1e00a8 | 1575 | int size = PATH_MAX; |
c338aee8 | 1576 | char *name; |
a2928c42 ACM |
1577 | int ret = -1; |
1578 | int fd; | |
23346f21 | 1579 | struct machine *machine; |
a1645ce1 | 1580 | const char *root_dir; |
6da80ce8 | 1581 | int want_symtab; |
a2928c42 | 1582 | |
aeafcbaf | 1583 | dso__set_loaded(dso, map->type); |
66bd8424 | 1584 | |
aeafcbaf ACM |
1585 | if (dso->kernel == DSO_TYPE_KERNEL) |
1586 | return dso__load_kernel_sym(dso, map, filter); | |
1587 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1588 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1589 | |
23346f21 ACM |
1590 | if (map->groups && map->groups->machine) |
1591 | machine = map->groups->machine; | |
a1645ce1 | 1592 | else |
23346f21 | 1593 | machine = NULL; |
c338aee8 ACM |
1594 | |
1595 | name = malloc(size); | |
a2928c42 ACM |
1596 | if (!name) |
1597 | return -1; | |
1598 | ||
aeafcbaf | 1599 | dso->adjust_symbols = 0; |
f5812a7a | 1600 | |
aeafcbaf | 1601 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1602 | struct stat st; |
1603 | ||
e9b52ef2 | 1604 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1605 | return -1; |
1606 | ||
1607 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1608 | pr_warning("File %s not owned by current user or root, " | |
1609 | "ignoring it.\n", dso->name); | |
1610 | return -1; | |
1611 | } | |
1612 | ||
aeafcbaf ACM |
1613 | ret = dso__load_perf_map(dso, map, filter); |
1614 | dso->symtab_type = ret > 0 ? SYMTAB__JAVA_JIT : | |
878b439d | 1615 | SYMTAB__NOT_FOUND; |
94cb9e38 ACM |
1616 | return ret; |
1617 | } | |
1618 | ||
6da80ce8 DM |
1619 | /* Iterate over candidate debug images. |
1620 | * On the first pass, only load images if they have a full symtab. | |
1621 | * Failing that, do a second pass where we accept .dynsym also | |
1622 | */ | |
60e4b10c ACM |
1623 | want_symtab = 1; |
1624 | restart: | |
aeafcbaf ACM |
1625 | for (dso->symtab_type = SYMTAB__BUILD_ID_CACHE; |
1626 | dso->symtab_type != SYMTAB__NOT_FOUND; | |
1627 | dso->symtab_type++) { | |
1628 | switch (dso->symtab_type) { | |
878b439d | 1629 | case SYMTAB__BUILD_ID_CACHE: |
ec5761ea DA |
1630 | /* skip the locally configured cache if a symfs is given */ |
1631 | if (symbol_conf.symfs[0] || | |
aeafcbaf | 1632 | (dso__build_id_filename(dso, name, size) == NULL)) { |
6da80ce8 | 1633 | continue; |
ec5761ea | 1634 | } |
6da80ce8 | 1635 | break; |
878b439d | 1636 | case SYMTAB__FEDORA_DEBUGINFO: |
ec5761ea | 1637 | snprintf(name, size, "%s/usr/lib/debug%s.debug", |
aeafcbaf | 1638 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1639 | break; |
878b439d | 1640 | case SYMTAB__UBUNTU_DEBUGINFO: |
ec5761ea | 1641 | snprintf(name, size, "%s/usr/lib/debug%s", |
aeafcbaf | 1642 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1643 | break; |
878b439d | 1644 | case SYMTAB__BUILDID_DEBUGINFO: { |
6da80ce8 DM |
1645 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
1646 | ||
aeafcbaf | 1647 | if (!dso->has_build_id) |
6da80ce8 DM |
1648 | continue; |
1649 | ||
aeafcbaf ACM |
1650 | build_id__sprintf(dso->build_id, |
1651 | sizeof(dso->build_id), | |
6da80ce8 DM |
1652 | build_id_hex); |
1653 | snprintf(name, size, | |
ec5761ea DA |
1654 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", |
1655 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1656 | } |
6da80ce8 | 1657 | break; |
878b439d | 1658 | case SYMTAB__SYSTEM_PATH_DSO: |
ec5761ea | 1659 | snprintf(name, size, "%s%s", |
aeafcbaf | 1660 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1661 | break; |
878b439d | 1662 | case SYMTAB__GUEST_KMODULE: |
fb7d0b3c KM |
1663 | if (map->groups && machine) |
1664 | root_dir = machine->root_dir; | |
a1645ce1 ZY |
1665 | else |
1666 | root_dir = ""; | |
ec5761ea | 1667 | snprintf(name, size, "%s%s%s", symbol_conf.symfs, |
aeafcbaf | 1668 | root_dir, dso->long_name); |
ec5761ea DA |
1669 | break; |
1670 | ||
878b439d | 1671 | case SYMTAB__SYSTEM_PATH_KMODULE: |
ec5761ea | 1672 | snprintf(name, size, "%s%s", symbol_conf.symfs, |
aeafcbaf | 1673 | dso->long_name); |
a1645ce1 | 1674 | break; |
60e4b10c | 1675 | default:; |
a2928c42 | 1676 | } |
6da80ce8 DM |
1677 | |
1678 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1679 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1680 | if (fd < 0) |
1681 | continue; | |
a2928c42 | 1682 | |
aeafcbaf | 1683 | ret = dso__load_sym(dso, map, name, fd, filter, 0, |
6da80ce8 DM |
1684 | want_symtab); |
1685 | close(fd); | |
a2928c42 | 1686 | |
6da80ce8 DM |
1687 | /* |
1688 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1689 | * info!?!? | |
1690 | */ | |
1691 | if (!ret) | |
1692 | continue; | |
a2928c42 | 1693 | |
6da80ce8 | 1694 | if (ret > 0) { |
aeafcbaf ACM |
1695 | int nr_plt = dso__synthesize_plt_symbols(dso, map, |
1696 | filter); | |
6da80ce8 DM |
1697 | if (nr_plt > 0) |
1698 | ret += nr_plt; | |
1699 | break; | |
1700 | } | |
a25e46c4 | 1701 | } |
6da80ce8 | 1702 | |
60e4b10c ACM |
1703 | /* |
1704 | * If we wanted a full symtab but no image had one, | |
1705 | * relax our requirements and repeat the search. | |
1706 | */ | |
1707 | if (ret <= 0 && want_symtab) { | |
1708 | want_symtab = 0; | |
1709 | goto restart; | |
1710 | } | |
1711 | ||
a2928c42 | 1712 | free(name); |
aeafcbaf | 1713 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1714 | return 0; |
a2928c42 ACM |
1715 | return ret; |
1716 | } | |
1717 | ||
aeafcbaf | 1718 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1719 | enum map_type type, const char *name) |
439d473b ACM |
1720 | { |
1721 | struct rb_node *nd; | |
1722 | ||
aeafcbaf | 1723 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1724 | struct map *map = rb_entry(nd, struct map, rb_node); |
1725 | ||
b7cece76 | 1726 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1727 | return map; |
1728 | } | |
1729 | ||
1730 | return NULL; | |
1731 | } | |
1732 | ||
aeafcbaf ACM |
1733 | static int dso__kernel_module_get_build_id(struct dso *dso, |
1734 | const char *root_dir) | |
b7cece76 ACM |
1735 | { |
1736 | char filename[PATH_MAX]; | |
1737 | /* | |
1738 | * kernel module short names are of the form "[module]" and | |
1739 | * we need just "module" here. | |
1740 | */ | |
aeafcbaf | 1741 | const char *name = dso->short_name + 1; |
b7cece76 ACM |
1742 | |
1743 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1744 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1745 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 | 1746 | |
aeafcbaf ACM |
1747 | if (sysfs__read_build_id(filename, dso->build_id, |
1748 | sizeof(dso->build_id)) == 0) | |
1749 | dso->has_build_id = true; | |
b7cece76 ACM |
1750 | |
1751 | return 0; | |
1752 | } | |
1753 | ||
aeafcbaf | 1754 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
a1645ce1 | 1755 | const char *dir_name) |
6cfcc53e | 1756 | { |
439d473b | 1757 | struct dirent *dent; |
5aab621b | 1758 | DIR *dir = opendir(dir_name); |
74534341 | 1759 | int ret = 0; |
6cfcc53e | 1760 | |
439d473b | 1761 | if (!dir) { |
5aab621b | 1762 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1763 | return -1; |
1764 | } | |
6cfcc53e | 1765 | |
439d473b ACM |
1766 | while ((dent = readdir(dir)) != NULL) { |
1767 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1768 | struct stat st; |
1769 | ||
1770 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
2b600f95 | 1771 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); |
a1645ce1 ZY |
1772 | if (stat(path, &st)) |
1773 | continue; | |
439d473b | 1774 | |
a1645ce1 | 1775 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1776 | if (!strcmp(dent->d_name, ".") || |
1777 | !strcmp(dent->d_name, "..")) | |
1778 | continue; | |
1779 | ||
aeafcbaf | 1780 | ret = map_groups__set_modules_path_dir(mg, path); |
74534341 GJ |
1781 | if (ret < 0) |
1782 | goto out; | |
439d473b ACM |
1783 | } else { |
1784 | char *dot = strrchr(dent->d_name, '.'), | |
1785 | dso_name[PATH_MAX]; | |
1786 | struct map *map; | |
cfc10d3b | 1787 | char *long_name; |
439d473b ACM |
1788 | |
1789 | if (dot == NULL || strcmp(dot, ".ko")) | |
1790 | continue; | |
1791 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1792 | (int)(dot - dent->d_name), dent->d_name); | |
1793 | ||
a2a99e8e | 1794 | strxfrchar(dso_name, '-', '_'); |
aeafcbaf ACM |
1795 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
1796 | dso_name); | |
439d473b ACM |
1797 | if (map == NULL) |
1798 | continue; | |
1799 | ||
cfc10d3b | 1800 | long_name = strdup(path); |
74534341 GJ |
1801 | if (long_name == NULL) { |
1802 | ret = -1; | |
1803 | goto out; | |
1804 | } | |
cfc10d3b | 1805 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1806 | map->dso->lname_alloc = 1; |
a1645ce1 | 1807 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1808 | } |
439d473b | 1809 | } |
6cfcc53e | 1810 | |
74534341 | 1811 | out: |
439d473b | 1812 | closedir(dir); |
74534341 | 1813 | return ret; |
439d473b | 1814 | } |
6cfcc53e | 1815 | |
a1645ce1 | 1816 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1817 | { |
a1645ce1 ZY |
1818 | char version[PATH_MAX]; |
1819 | FILE *file; | |
1820 | char *name, *tmp; | |
1821 | const char *prefix = "Linux version "; | |
1822 | ||
1823 | sprintf(version, "%s/proc/version", root_dir); | |
1824 | file = fopen(version, "r"); | |
1825 | if (!file) | |
1826 | return NULL; | |
1827 | ||
1828 | version[0] = '\0'; | |
1829 | tmp = fgets(version, sizeof(version), file); | |
1830 | fclose(file); | |
1831 | ||
1832 | name = strstr(version, prefix); | |
1833 | if (!name) | |
1834 | return NULL; | |
1835 | name += strlen(prefix); | |
1836 | tmp = strchr(name, ' '); | |
1837 | if (tmp) | |
1838 | *tmp = '\0'; | |
1839 | ||
1840 | return strdup(name); | |
1841 | } | |
1842 | ||
aeafcbaf | 1843 | static int machine__set_modules_path(struct machine *machine) |
a1645ce1 ZY |
1844 | { |
1845 | char *version; | |
439d473b | 1846 | char modules_path[PATH_MAX]; |
6cfcc53e | 1847 | |
aeafcbaf | 1848 | version = get_kernel_version(machine->root_dir); |
a1645ce1 | 1849 | if (!version) |
439d473b | 1850 | return -1; |
6cfcc53e | 1851 | |
a1645ce1 | 1852 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
aeafcbaf | 1853 | machine->root_dir, version); |
a1645ce1 | 1854 | free(version); |
6cfcc53e | 1855 | |
aeafcbaf | 1856 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
6cfcc53e MG |
1857 | } |
1858 | ||
439d473b ACM |
1859 | /* |
1860 | * Constructor variant for modules (where we know from /proc/modules where | |
1861 | * they are loaded) and for vmlinux, where only after we load all the | |
1862 | * symbols we'll know where it starts and ends. | |
1863 | */ | |
3610583c | 1864 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1865 | { |
aeafcbaf ACM |
1866 | struct map *map = calloc(1, (sizeof(*map) + |
1867 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
1868 | if (map != NULL) { | |
439d473b | 1869 | /* |
afb7b4f0 | 1870 | * ->end will be filled after we load all the symbols |
439d473b | 1871 | */ |
aeafcbaf | 1872 | map__init(map, type, start, 0, 0, dso); |
439d473b | 1873 | } |
afb7b4f0 | 1874 | |
aeafcbaf | 1875 | return map; |
439d473b ACM |
1876 | } |
1877 | ||
aeafcbaf | 1878 | struct map *machine__new_module(struct machine *machine, u64 start, |
d28c6223 | 1879 | const char *filename) |
b7cece76 ACM |
1880 | { |
1881 | struct map *map; | |
aeafcbaf | 1882 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
1883 | |
1884 | if (dso == NULL) | |
1885 | return NULL; | |
1886 | ||
1887 | map = map__new2(start, dso, MAP__FUNCTION); | |
1888 | if (map == NULL) | |
1889 | return NULL; | |
1890 | ||
aeafcbaf | 1891 | if (machine__is_host(machine)) |
878b439d | 1892 | dso->symtab_type = SYMTAB__SYSTEM_PATH_KMODULE; |
a1645ce1 | 1893 | else |
878b439d | 1894 | dso->symtab_type = SYMTAB__GUEST_KMODULE; |
aeafcbaf | 1895 | map_groups__insert(&machine->kmaps, map); |
b7cece76 ACM |
1896 | return map; |
1897 | } | |
1898 | ||
aeafcbaf | 1899 | static int machine__create_modules(struct machine *machine) |
439d473b ACM |
1900 | { |
1901 | char *line = NULL; | |
1902 | size_t n; | |
a1645ce1 | 1903 | FILE *file; |
439d473b | 1904 | struct map *map; |
a1645ce1 ZY |
1905 | const char *modules; |
1906 | char path[PATH_MAX]; | |
1907 | ||
aeafcbaf | 1908 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
1909 | modules = symbol_conf.default_guest_modules; |
1910 | else { | |
aeafcbaf | 1911 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
1912 | modules = path; |
1913 | } | |
6cfcc53e | 1914 | |
ec80fde7 ACM |
1915 | if (symbol__restricted_filename(path, "/proc/modules")) |
1916 | return -1; | |
1917 | ||
a1645ce1 | 1918 | file = fopen(modules, "r"); |
439d473b ACM |
1919 | if (file == NULL) |
1920 | return -1; | |
6cfcc53e | 1921 | |
439d473b ACM |
1922 | while (!feof(file)) { |
1923 | char name[PATH_MAX]; | |
1924 | u64 start; | |
439d473b ACM |
1925 | char *sep; |
1926 | int line_len; | |
6cfcc53e | 1927 | |
439d473b ACM |
1928 | line_len = getline(&line, &n, file); |
1929 | if (line_len < 0) | |
1930 | break; | |
1931 | ||
1932 | if (!line) | |
1933 | goto out_failure; | |
1934 | ||
1935 | line[--line_len] = '\0'; /* \n */ | |
1936 | ||
1937 | sep = strrchr(line, 'x'); | |
1938 | if (sep == NULL) | |
1939 | continue; | |
1940 | ||
1941 | hex2u64(sep + 1, &start); | |
1942 | ||
1943 | sep = strchr(line, ' '); | |
1944 | if (sep == NULL) | |
1945 | continue; | |
1946 | ||
1947 | *sep = '\0'; | |
1948 | ||
1949 | snprintf(name, sizeof(name), "[%s]", line); | |
aeafcbaf | 1950 | map = machine__new_module(machine, start, name); |
b7cece76 | 1951 | if (map == NULL) |
439d473b | 1952 | goto out_delete_line; |
aeafcbaf | 1953 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
6cfcc53e | 1954 | } |
439d473b ACM |
1955 | |
1956 | free(line); | |
1957 | fclose(file); | |
1958 | ||
aeafcbaf | 1959 | return machine__set_modules_path(machine); |
439d473b ACM |
1960 | |
1961 | out_delete_line: | |
1962 | free(line); | |
1963 | out_failure: | |
1964 | return -1; | |
6cfcc53e MG |
1965 | } |
1966 | ||
aeafcbaf | 1967 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 1968 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1969 | { |
fbd733b8 | 1970 | int err = -1, fd; |
ec5761ea | 1971 | char symfs_vmlinux[PATH_MAX]; |
a2928c42 | 1972 | |
a639dc64 | 1973 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea DA |
1974 | symbol_conf.symfs, vmlinux); |
1975 | fd = open(symfs_vmlinux, O_RDONLY); | |
a2928c42 ACM |
1976 | if (fd < 0) |
1977 | return -1; | |
1978 | ||
aeafcbaf ACM |
1979 | dso__set_long_name(dso, (char *)vmlinux); |
1980 | dso__set_loaded(dso, map->type); | |
1981 | err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0); | |
a2928c42 ACM |
1982 | close(fd); |
1983 | ||
3846df2e | 1984 | if (err > 0) |
ec5761ea | 1985 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
3846df2e | 1986 | |
a2928c42 ACM |
1987 | return err; |
1988 | } | |
1989 | ||
aeafcbaf | 1990 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1991 | symbol_filter_t filter) |
a19afe46 ACM |
1992 | { |
1993 | int i, err = 0; | |
5ad90e4e | 1994 | char *filename; |
a19afe46 ACM |
1995 | |
1996 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1997 | vmlinux_path__nr_entries + 1); |
1998 | ||
aeafcbaf | 1999 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 2000 | if (filename != NULL) { |
aeafcbaf | 2001 | err = dso__load_vmlinux(dso, map, filename, filter); |
5ad90e4e | 2002 | if (err > 0) { |
aeafcbaf | 2003 | dso__set_long_name(dso, filename); |
5ad90e4e ACM |
2004 | goto out; |
2005 | } | |
2006 | free(filename); | |
2007 | } | |
a19afe46 ACM |
2008 | |
2009 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 2010 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 2011 | if (err > 0) { |
aeafcbaf | 2012 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
a19afe46 ACM |
2013 | break; |
2014 | } | |
2015 | } | |
5ad90e4e | 2016 | out: |
a19afe46 ACM |
2017 | return err; |
2018 | } | |
2019 | ||
aeafcbaf | 2020 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 2021 | symbol_filter_t filter) |
a827c875 | 2022 | { |
cc612d81 | 2023 | int err; |
9e201442 ACM |
2024 | const char *kallsyms_filename = NULL; |
2025 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 2026 | /* |
b226a5a7 DA |
2027 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
2028 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
2029 | * |
2030 | * For instance, try to analyse an ARM perf.data file _without_ a | |
2031 | * build-id, or if the user specifies the wrong path to the right | |
2032 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
2033 | * x86_86 one, on the machine where analysis is being performed, say), | |
2034 | * or worse, /proc/kallsyms. | |
2035 | * | |
2036 | * If the specified file _has_ a build-id and there is a build-id | |
2037 | * section in the perf.data file, we will still do the expected | |
2038 | * validation in dso__load_vmlinux and will bail out if they don't | |
2039 | * match. | |
2040 | */ | |
b226a5a7 DA |
2041 | if (symbol_conf.kallsyms_name != NULL) { |
2042 | kallsyms_filename = symbol_conf.kallsyms_name; | |
2043 | goto do_kallsyms; | |
2044 | } | |
2045 | ||
dc8d6ab2 | 2046 | if (symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 2047 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 2048 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 2049 | if (err > 0) { |
aeafcbaf | 2050 | dso__set_long_name(dso, |
e7dadc00 ACM |
2051 | strdup(symbol_conf.vmlinux_name)); |
2052 | goto out_fixup; | |
2053 | } | |
2054 | return err; | |
dc8d6ab2 | 2055 | } |
cc612d81 ACM |
2056 | |
2057 | if (vmlinux_path != NULL) { | |
aeafcbaf | 2058 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 ACM |
2059 | if (err > 0) |
2060 | goto out_fixup; | |
cc612d81 ACM |
2061 | } |
2062 | ||
ec5761ea DA |
2063 | /* do not try local files if a symfs was given */ |
2064 | if (symbol_conf.symfs[0] != 0) | |
2065 | return -1; | |
2066 | ||
b7cece76 ACM |
2067 | /* |
2068 | * Say the kernel DSO was created when processing the build-id header table, | |
2069 | * we have a build-id, so check if it is the same as the running kernel, | |
2070 | * using it if it is. | |
2071 | */ | |
aeafcbaf | 2072 | if (dso->has_build_id) { |
b7cece76 | 2073 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 2074 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
2075 | |
2076 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 2077 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 2078 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 2079 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 2080 | goto do_kallsyms; |
9e201442 | 2081 | } |
8d0591f6 | 2082 | } |
dc8d6ab2 ACM |
2083 | /* |
2084 | * Now look if we have it on the build-id cache in | |
2085 | * $HOME/.debug/[kernel.kallsyms]. | |
2086 | */ | |
aeafcbaf | 2087 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
2088 | sbuild_id); |
2089 | ||
2090 | if (asprintf(&kallsyms_allocated_filename, | |
2091 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
2092 | getenv("HOME"), sbuild_id) == -1) { |
2093 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 2094 | return -1; |
3846df2e | 2095 | } |
dc8d6ab2 | 2096 | |
19fc2ded ACM |
2097 | kallsyms_filename = kallsyms_allocated_filename; |
2098 | ||
dc8d6ab2 | 2099 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
2100 | pr_err("No kallsyms or vmlinux with build-id %s " |
2101 | "was found\n", sbuild_id); | |
9e201442 | 2102 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 2103 | return -1; |
9e201442 | 2104 | } |
dc8d6ab2 ACM |
2105 | } else { |
2106 | /* | |
2107 | * Last resort, if we don't have a build-id and couldn't find | |
2108 | * any vmlinux file, try the running kernel kallsyms table. | |
2109 | */ | |
9e201442 | 2110 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 2111 | } |
439d473b | 2112 | |
cc612d81 | 2113 | do_kallsyms: |
aeafcbaf | 2114 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
2115 | if (err > 0) |
2116 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2117 | free(kallsyms_allocated_filename); |
439d473b ACM |
2118 | |
2119 | if (err > 0) { | |
cc612d81 | 2120 | out_fixup: |
e1c7c6a4 | 2121 | if (kallsyms_filename != NULL) |
aeafcbaf | 2122 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
2123 | map__fixup_start(map); |
2124 | map__fixup_end(map); | |
439d473b | 2125 | } |
94cb9e38 | 2126 | |
a827c875 ACM |
2127 | return err; |
2128 | } | |
2129 | ||
aeafcbaf ACM |
2130 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
2131 | symbol_filter_t filter) | |
a1645ce1 ZY |
2132 | { |
2133 | int err; | |
2134 | const char *kallsyms_filename = NULL; | |
23346f21 | 2135 | struct machine *machine; |
a1645ce1 ZY |
2136 | char path[PATH_MAX]; |
2137 | ||
2138 | if (!map->groups) { | |
2139 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
2140 | return -1; | |
2141 | } | |
23346f21 | 2142 | machine = map->groups->machine; |
a1645ce1 | 2143 | |
23346f21 | 2144 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2145 | /* |
2146 | * if the user specified a vmlinux filename, use it and only | |
2147 | * it, reporting errors to the user if it cannot be used. | |
2148 | * Or use file guest_kallsyms inputted by user on commandline | |
2149 | */ | |
2150 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2151 | err = dso__load_vmlinux(dso, map, |
a1645ce1 ZY |
2152 | symbol_conf.default_guest_vmlinux_name, filter); |
2153 | goto out_try_fixup; | |
2154 | } | |
2155 | ||
2156 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2157 | if (!kallsyms_filename) | |
2158 | return -1; | |
2159 | } else { | |
23346f21 | 2160 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2161 | kallsyms_filename = path; |
2162 | } | |
2163 | ||
aeafcbaf | 2164 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
a1645ce1 ZY |
2165 | if (err > 0) |
2166 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
2167 | ||
2168 | out_try_fixup: | |
2169 | if (err > 0) { | |
2170 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 2171 | machine__mmap_name(machine, path, sizeof(path)); |
aeafcbaf | 2172 | dso__set_long_name(dso, strdup(path)); |
a1645ce1 ZY |
2173 | } |
2174 | map__fixup_start(map); | |
2175 | map__fixup_end(map); | |
2176 | } | |
2177 | ||
2178 | return err; | |
2179 | } | |
cd84c2ac | 2180 | |
b0da954a | 2181 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 2182 | { |
b0da954a | 2183 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
2184 | } |
2185 | ||
b0da954a | 2186 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
2187 | { |
2188 | struct dso *pos; | |
2189 | ||
b0da954a | 2190 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 2191 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
2192 | return pos; |
2193 | return NULL; | |
2194 | } | |
2195 | ||
a89e5abe | 2196 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2197 | { |
a89e5abe | 2198 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2199 | |
e4204992 | 2200 | if (!dso) { |
00a192b3 | 2201 | dso = dso__new(name); |
cfc10d3b | 2202 | if (dso != NULL) { |
a89e5abe | 2203 | dsos__add(head, dso); |
cfc10d3b ACM |
2204 | dso__set_basename(dso); |
2205 | } | |
66bd8424 | 2206 | } |
cd84c2ac FW |
2207 | |
2208 | return dso; | |
cd84c2ac FW |
2209 | } |
2210 | ||
1f626bc3 | 2211 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2212 | { |
2213 | struct dso *pos; | |
cbf69680 | 2214 | size_t ret = 0; |
cd84c2ac | 2215 | |
95011c60 ACM |
2216 | list_for_each_entry(pos, head, node) { |
2217 | int i; | |
2218 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2219 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2220 | } |
cbf69680 ACM |
2221 | |
2222 | return ret; | |
cd84c2ac FW |
2223 | } |
2224 | ||
aeafcbaf | 2225 | size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp) |
b0da954a | 2226 | { |
a1645ce1 | 2227 | struct rb_node *nd; |
cbf69680 | 2228 | size_t ret = 0; |
a1645ce1 | 2229 | |
aeafcbaf | 2230 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2231 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2232 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2233 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2234 | } |
cbf69680 ACM |
2235 | |
2236 | return ret; | |
b0da954a ACM |
2237 | } |
2238 | ||
88d3d9b7 ACM |
2239 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2240 | bool with_hits) | |
9e03eb2d ACM |
2241 | { |
2242 | struct dso *pos; | |
2243 | size_t ret = 0; | |
2244 | ||
b0da954a | 2245 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2246 | if (with_hits && !pos->hit) |
2247 | continue; | |
9e03eb2d | 2248 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2249 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2250 | } |
2251 | return ret; | |
2252 | } | |
2253 | ||
aeafcbaf ACM |
2254 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
2255 | bool with_hits) | |
f869097e | 2256 | { |
aeafcbaf ACM |
2257 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) + |
2258 | __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits); | |
f869097e ACM |
2259 | } |
2260 | ||
aeafcbaf ACM |
2261 | size_t machines__fprintf_dsos_buildid(struct rb_root *machines, |
2262 | FILE *fp, bool with_hits) | |
b0da954a | 2263 | { |
a1645ce1 ZY |
2264 | struct rb_node *nd; |
2265 | size_t ret = 0; | |
2266 | ||
aeafcbaf | 2267 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2268 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2269 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2270 | } |
2271 | return ret; | |
b0da954a ACM |
2272 | } |
2273 | ||
f57b05ed JO |
2274 | static struct dso* |
2275 | dso__kernel_findnew(struct machine *machine, const char *name, | |
2276 | const char *short_name, int dso_type) | |
fd1d908c | 2277 | { |
f57b05ed JO |
2278 | /* |
2279 | * The kernel dso could be created by build_id processing. | |
2280 | */ | |
2281 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
a1645ce1 | 2282 | |
f57b05ed JO |
2283 | /* |
2284 | * We need to run this in all cases, since during the build_id | |
2285 | * processing we had no idea this was the kernel dso. | |
2286 | */ | |
aeafcbaf | 2287 | if (dso != NULL) { |
f57b05ed JO |
2288 | dso__set_short_name(dso, short_name); |
2289 | dso->kernel = dso_type; | |
fd1d908c ACM |
2290 | } |
2291 | ||
aeafcbaf | 2292 | return dso; |
fd1d908c ACM |
2293 | } |
2294 | ||
aeafcbaf | 2295 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
fd1d908c | 2296 | { |
a1645ce1 ZY |
2297 | char path[PATH_MAX]; |
2298 | ||
23346f21 | 2299 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2300 | return; |
23346f21 | 2301 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
aeafcbaf ACM |
2302 | if (sysfs__read_build_id(path, dso->build_id, |
2303 | sizeof(dso->build_id)) == 0) | |
2304 | dso->has_build_id = true; | |
fd1d908c ACM |
2305 | } |
2306 | ||
f57b05ed | 2307 | static struct dso *machine__get_kernel(struct machine *machine) |
cd84c2ac | 2308 | { |
a1645ce1 ZY |
2309 | const char *vmlinux_name = NULL; |
2310 | struct dso *kernel; | |
cd84c2ac | 2311 | |
aeafcbaf | 2312 | if (machine__is_host(machine)) { |
a1645ce1 | 2313 | vmlinux_name = symbol_conf.vmlinux_name; |
f57b05ed JO |
2314 | if (!vmlinux_name) |
2315 | vmlinux_name = "[kernel.kallsyms]"; | |
2316 | ||
2317 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2318 | "[kernel]", | |
2319 | DSO_TYPE_KERNEL); | |
a1645ce1 | 2320 | } else { |
f57b05ed JO |
2321 | char bf[PATH_MAX]; |
2322 | ||
aeafcbaf | 2323 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2324 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
f57b05ed JO |
2325 | if (!vmlinux_name) |
2326 | vmlinux_name = machine__mmap_name(machine, bf, | |
2327 | sizeof(bf)); | |
2328 | ||
2329 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2330 | "[guest.kernel]", | |
2331 | DSO_TYPE_GUEST_KERNEL); | |
8d92c02a | 2332 | } |
cd84c2ac | 2333 | |
f57b05ed | 2334 | if (kernel != NULL && (!kernel->has_build_id)) |
aeafcbaf | 2335 | dso__read_running_kernel_build_id(kernel, machine); |
f57b05ed | 2336 | |
f1dfa0b1 | 2337 | return kernel; |
f1dfa0b1 ACM |
2338 | } |
2339 | ||
d214afbd ML |
2340 | struct process_args { |
2341 | u64 start; | |
2342 | }; | |
2343 | ||
2344 | static int symbol__in_kernel(void *arg, const char *name, | |
3b01a413 | 2345 | char type __used, u64 start, u64 end __used) |
d214afbd ML |
2346 | { |
2347 | struct process_args *args = arg; | |
2348 | ||
2349 | if (strchr(name, '[')) | |
2350 | return 0; | |
2351 | ||
2352 | args->start = start; | |
2353 | return 1; | |
2354 | } | |
2355 | ||
2356 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
2357 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
2358 | { | |
2359 | const char *filename; | |
2360 | char path[PATH_MAX]; | |
2361 | struct process_args args; | |
2362 | ||
2363 | if (machine__is_host(machine)) { | |
2364 | filename = "/proc/kallsyms"; | |
2365 | } else { | |
2366 | if (machine__is_default_guest(machine)) | |
2367 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
2368 | else { | |
2369 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
2370 | filename = path; | |
2371 | } | |
2372 | } | |
2373 | ||
ec80fde7 ACM |
2374 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
2375 | return 0; | |
2376 | ||
d214afbd ML |
2377 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
2378 | return 0; | |
2379 | ||
2380 | return args.start; | |
2381 | } | |
2382 | ||
aeafcbaf | 2383 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
f1dfa0b1 | 2384 | { |
de176489 | 2385 | enum map_type type; |
aeafcbaf | 2386 | u64 start = machine__get_kernel_start_addr(machine); |
f1dfa0b1 | 2387 | |
de176489 | 2388 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2389 | struct kmap *kmap; |
2390 | ||
aeafcbaf ACM |
2391 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
2392 | if (machine->vmlinux_maps[type] == NULL) | |
de176489 | 2393 | return -1; |
f1dfa0b1 | 2394 | |
aeafcbaf ACM |
2395 | machine->vmlinux_maps[type]->map_ip = |
2396 | machine->vmlinux_maps[type]->unmap_ip = | |
2397 | identity__map_ip; | |
2398 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
2399 | kmap->kmaps = &machine->kmaps; | |
2400 | map_groups__insert(&machine->kmaps, | |
2401 | machine->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2402 | } |
2403 | ||
f1dfa0b1 | 2404 | return 0; |
2446042c ACM |
2405 | } |
2406 | ||
aeafcbaf | 2407 | void machine__destroy_kernel_maps(struct machine *machine) |
076c6e45 ACM |
2408 | { |
2409 | enum map_type type; | |
2410 | ||
2411 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2412 | struct kmap *kmap; | |
2413 | ||
aeafcbaf | 2414 | if (machine->vmlinux_maps[type] == NULL) |
076c6e45 ACM |
2415 | continue; |
2416 | ||
aeafcbaf ACM |
2417 | kmap = map__kmap(machine->vmlinux_maps[type]); |
2418 | map_groups__remove(&machine->kmaps, | |
2419 | machine->vmlinux_maps[type]); | |
076c6e45 ACM |
2420 | if (kmap->ref_reloc_sym) { |
2421 | /* | |
2422 | * ref_reloc_sym is shared among all maps, so free just | |
2423 | * on one of them. | |
2424 | */ | |
2425 | if (type == MAP__FUNCTION) { | |
2426 | free((char *)kmap->ref_reloc_sym->name); | |
2427 | kmap->ref_reloc_sym->name = NULL; | |
2428 | free(kmap->ref_reloc_sym); | |
2429 | } | |
2430 | kmap->ref_reloc_sym = NULL; | |
2431 | } | |
2432 | ||
aeafcbaf ACM |
2433 | map__delete(machine->vmlinux_maps[type]); |
2434 | machine->vmlinux_maps[type] = NULL; | |
076c6e45 ACM |
2435 | } |
2436 | } | |
2437 | ||
aeafcbaf | 2438 | int machine__create_kernel_maps(struct machine *machine) |
5c0541d5 | 2439 | { |
f57b05ed | 2440 | struct dso *kernel = machine__get_kernel(machine); |
5c0541d5 ACM |
2441 | |
2442 | if (kernel == NULL || | |
aeafcbaf | 2443 | __machine__create_kernel_maps(machine, kernel) < 0) |
5c0541d5 ACM |
2444 | return -1; |
2445 | ||
aeafcbaf | 2446 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) |
5c0541d5 ACM |
2447 | pr_debug("Problems creating module maps, continuing anyway...\n"); |
2448 | /* | |
2449 | * Now that we have all the maps created, just set the ->end of them: | |
2450 | */ | |
aeafcbaf | 2451 | map_groups__fixup_end(&machine->kmaps); |
5c0541d5 ACM |
2452 | return 0; |
2453 | } | |
2454 | ||
cc612d81 ACM |
2455 | static void vmlinux_path__exit(void) |
2456 | { | |
2457 | while (--vmlinux_path__nr_entries >= 0) { | |
2458 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2459 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2460 | } | |
2461 | ||
2462 | free(vmlinux_path); | |
2463 | vmlinux_path = NULL; | |
2464 | } | |
2465 | ||
2466 | static int vmlinux_path__init(void) | |
2467 | { | |
2468 | struct utsname uts; | |
2469 | char bf[PATH_MAX]; | |
2470 | ||
cc612d81 ACM |
2471 | vmlinux_path = malloc(sizeof(char *) * 5); |
2472 | if (vmlinux_path == NULL) | |
2473 | return -1; | |
2474 | ||
2475 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2476 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2477 | goto out_fail; | |
2478 | ++vmlinux_path__nr_entries; | |
2479 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2480 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2481 | goto out_fail; | |
2482 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
2483 | |
2484 | /* only try running kernel version if no symfs was given */ | |
2485 | if (symbol_conf.symfs[0] != 0) | |
2486 | return 0; | |
2487 | ||
2488 | if (uname(&uts) < 0) | |
2489 | return -1; | |
2490 | ||
cc612d81 ACM |
2491 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
2492 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2493 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2494 | goto out_fail; | |
2495 | ++vmlinux_path__nr_entries; | |
2496 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", 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 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2502 | uts.release); | |
2503 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2504 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2505 | goto out_fail; | |
2506 | ++vmlinux_path__nr_entries; | |
2507 | ||
2508 | return 0; | |
2509 | ||
2510 | out_fail: | |
2511 | vmlinux_path__exit(); | |
2512 | return -1; | |
2513 | } | |
2514 | ||
aeafcbaf | 2515 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
b0a9ab62 ACM |
2516 | { |
2517 | int i; | |
2518 | size_t printed = 0; | |
aeafcbaf | 2519 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
5ad90e4e ACM |
2520 | |
2521 | if (kdso->has_build_id) { | |
2522 | char filename[PATH_MAX]; | |
2523 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2524 | printed += fprintf(fp, "[0] %s\n", filename); | |
2525 | } | |
b0a9ab62 ACM |
2526 | |
2527 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2528 | printed += fprintf(fp, "[%d] %s\n", |
2529 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2530 | |
2531 | return printed; | |
2532 | } | |
2533 | ||
655000e7 ACM |
2534 | static int setup_list(struct strlist **list, const char *list_str, |
2535 | const char *list_name) | |
2536 | { | |
2537 | if (list_str == NULL) | |
2538 | return 0; | |
2539 | ||
2540 | *list = strlist__new(true, list_str); | |
2541 | if (!*list) { | |
2542 | pr_err("problems parsing %s list\n", list_name); | |
2543 | return -1; | |
2544 | } | |
2545 | return 0; | |
2546 | } | |
2547 | ||
ec80fde7 ACM |
2548 | static bool symbol__read_kptr_restrict(void) |
2549 | { | |
2550 | bool value = false; | |
2551 | ||
2552 | if (geteuid() != 0) { | |
2553 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
2554 | if (fp != NULL) { | |
2555 | char line[8]; | |
2556 | ||
2557 | if (fgets(line, sizeof(line), fp) != NULL) | |
2558 | value = atoi(line) != 0; | |
2559 | ||
2560 | fclose(fp); | |
2561 | } | |
2562 | } | |
2563 | ||
2564 | return value; | |
2565 | } | |
2566 | ||
75be6cf4 | 2567 | int symbol__init(void) |
2446042c | 2568 | { |
ec5761ea DA |
2569 | const char *symfs; |
2570 | ||
85e00b55 JZ |
2571 | if (symbol_conf.initialized) |
2572 | return 0; | |
2573 | ||
4d439517 DM |
2574 | symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); |
2575 | ||
95011c60 | 2576 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2577 | if (symbol_conf.sort_by_name) |
2578 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2579 | sizeof(struct symbol)); | |
b32d133a | 2580 | |
75be6cf4 | 2581 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2582 | return -1; |
2583 | ||
c410a338 ACM |
2584 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2585 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2586 | return -1; | |
2587 | } | |
2588 | ||
655000e7 ACM |
2589 | if (setup_list(&symbol_conf.dso_list, |
2590 | symbol_conf.dso_list_str, "dso") < 0) | |
2591 | return -1; | |
2592 | ||
2593 | if (setup_list(&symbol_conf.comm_list, | |
2594 | symbol_conf.comm_list_str, "comm") < 0) | |
2595 | goto out_free_dso_list; | |
2596 | ||
2597 | if (setup_list(&symbol_conf.sym_list, | |
2598 | symbol_conf.sym_list_str, "symbol") < 0) | |
2599 | goto out_free_comm_list; | |
2600 | ||
ec5761ea DA |
2601 | /* |
2602 | * A path to symbols of "/" is identical to "" | |
2603 | * reset here for simplicity. | |
2604 | */ | |
2605 | symfs = realpath(symbol_conf.symfs, NULL); | |
2606 | if (symfs == NULL) | |
2607 | symfs = symbol_conf.symfs; | |
2608 | if (strcmp(symfs, "/") == 0) | |
2609 | symbol_conf.symfs = ""; | |
2610 | if (symfs != symbol_conf.symfs) | |
2611 | free((void *)symfs); | |
2612 | ||
ec80fde7 ACM |
2613 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2614 | ||
85e00b55 | 2615 | symbol_conf.initialized = true; |
4aa65636 | 2616 | return 0; |
655000e7 | 2617 | |
655000e7 ACM |
2618 | out_free_comm_list: |
2619 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2620 | out_free_dso_list: |
2621 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2622 | return -1; |
4aa65636 ACM |
2623 | } |
2624 | ||
d65a458b ACM |
2625 | void symbol__exit(void) |
2626 | { | |
85e00b55 JZ |
2627 | if (!symbol_conf.initialized) |
2628 | return; | |
d65a458b ACM |
2629 | strlist__delete(symbol_conf.sym_list); |
2630 | strlist__delete(symbol_conf.dso_list); | |
2631 | strlist__delete(symbol_conf.comm_list); | |
2632 | vmlinux_path__exit(); | |
2633 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2634 | symbol_conf.initialized = false; |
d65a458b ACM |
2635 | } |
2636 | ||
aeafcbaf | 2637 | int machines__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2638 | { |
aeafcbaf | 2639 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2640 | |
23346f21 | 2641 | if (machine == NULL) |
a1645ce1 | 2642 | return -1; |
cc612d81 | 2643 | |
5c0541d5 | 2644 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2645 | } |
5aab621b ACM |
2646 | |
2647 | static int hex(char ch) | |
2648 | { | |
2649 | if ((ch >= '0') && (ch <= '9')) | |
2650 | return ch - '0'; | |
2651 | if ((ch >= 'a') && (ch <= 'f')) | |
2652 | return ch - 'a' + 10; | |
2653 | if ((ch >= 'A') && (ch <= 'F')) | |
2654 | return ch - 'A' + 10; | |
2655 | return -1; | |
2656 | } | |
2657 | ||
2658 | /* | |
2659 | * While we find nice hex chars, build a long_val. | |
2660 | * Return number of chars processed. | |
2661 | */ | |
2662 | int hex2u64(const char *ptr, u64 *long_val) | |
2663 | { | |
2664 | const char *p = ptr; | |
2665 | *long_val = 0; | |
2666 | ||
2667 | while (*p) { | |
2668 | const int hex_val = hex(*p); | |
2669 | ||
2670 | if (hex_val < 0) | |
2671 | break; | |
2672 | ||
2673 | *long_val = (*long_val << 4) | hex_val; | |
2674 | p++; | |
2675 | } | |
2676 | ||
2677 | return p - ptr; | |
2678 | } | |
2679 | ||
2680 | char *strxfrchar(char *s, char from, char to) | |
2681 | { | |
2682 | char *p = s; | |
2683 | ||
2684 | while ((p = strchr(p, from)) != NULL) | |
2685 | *p++ = to; | |
2686 | ||
2687 | return s; | |
2688 | } | |
a1645ce1 | 2689 | |
aeafcbaf | 2690 | int machines__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2691 | { |
2692 | int ret = 0; | |
2693 | struct dirent **namelist = NULL; | |
2694 | int i, items = 0; | |
2695 | char path[PATH_MAX]; | |
2696 | pid_t pid; | |
2697 | ||
2698 | if (symbol_conf.default_guest_vmlinux_name || | |
2699 | symbol_conf.default_guest_modules || | |
2700 | symbol_conf.default_guest_kallsyms) { | |
aeafcbaf | 2701 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2702 | } |
2703 | ||
2704 | if (symbol_conf.guestmount) { | |
2705 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2706 | if (items <= 0) | |
2707 | return -ENOENT; | |
2708 | for (i = 0; i < items; i++) { | |
2709 | if (!isdigit(namelist[i]->d_name[0])) { | |
2710 | /* Filter out . and .. */ | |
2711 | continue; | |
2712 | } | |
2713 | pid = atoi(namelist[i]->d_name); | |
2714 | sprintf(path, "%s/%s/proc/kallsyms", | |
2715 | symbol_conf.guestmount, | |
2716 | namelist[i]->d_name); | |
2717 | ret = access(path, R_OK); | |
2718 | if (ret) { | |
2719 | pr_debug("Can't access file %s\n", path); | |
2720 | goto failure; | |
2721 | } | |
aeafcbaf | 2722 | machines__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2723 | } |
2724 | failure: | |
2725 | free(namelist); | |
2726 | } | |
2727 | ||
2728 | return ret; | |
2729 | } | |
5c0541d5 | 2730 | |
aeafcbaf | 2731 | void machines__destroy_guest_kernel_maps(struct rb_root *machines) |
076c6e45 | 2732 | { |
aeafcbaf | 2733 | struct rb_node *next = rb_first(machines); |
076c6e45 ACM |
2734 | |
2735 | while (next) { | |
2736 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2737 | ||
2738 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 2739 | rb_erase(&pos->rb_node, machines); |
076c6e45 ACM |
2740 | machine__delete(pos); |
2741 | } | |
2742 | } | |
2743 | ||
aeafcbaf | 2744 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
5c0541d5 ACM |
2745 | enum map_type type, symbol_filter_t filter) |
2746 | { | |
aeafcbaf | 2747 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2748 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
2749 | ||
2750 | if (ret > 0) { | |
2751 | dso__set_loaded(map->dso, type); | |
2752 | /* | |
2753 | * Since /proc/kallsyms will have multiple sessions for the | |
2754 | * kernel, with modules between them, fixup the end of all | |
2755 | * sections. | |
2756 | */ | |
aeafcbaf | 2757 | __map_groups__fixup_end(&machine->kmaps, type); |
5c0541d5 ACM |
2758 | } |
2759 | ||
2760 | return ret; | |
2761 | } | |
2762 | ||
aeafcbaf | 2763 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
5c0541d5 ACM |
2764 | symbol_filter_t filter) |
2765 | { | |
aeafcbaf | 2766 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2767 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
2768 | ||
2769 | if (ret > 0) { | |
2770 | dso__set_loaded(map->dso, type); | |
2771 | map__reloc_vmlinux(map); | |
2772 | } | |
2773 | ||
2774 | return ret; | |
2775 | } |