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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
5aab621b ACM |
2 | #include <dirent.h> |
3 | #include <errno.h> | |
5aab621b ACM |
4 | #include <stdlib.h> |
5 | #include <stdio.h> | |
6 | #include <string.h> | |
877a7a11 | 7 | #include <linux/kernel.h> |
e9814df8 | 8 | #include <linux/mman.h> |
5aab621b ACM |
9 | #include <sys/types.h> |
10 | #include <sys/stat.h> | |
11 | #include <sys/param.h> | |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
9486aa38 | 14 | #include <inttypes.h> |
b01141f4 | 15 | #include "annotate.h" |
b36f19d5 | 16 | #include "build-id.h" |
e334c726 | 17 | #include "util.h" |
8a6c5b26 | 18 | #include "debug.h" |
69d2591a | 19 | #include "machine.h" |
a2928c42 | 20 | #include "symbol.h" |
5aab621b | 21 | #include "strlist.h" |
e03eaa40 | 22 | #include "intlist.h" |
843ff37b | 23 | #include "namespaces.h" |
0a7e6d1b | 24 | #include "header.h" |
9a3993d4 | 25 | #include "path.h" |
3d689ed6 | 26 | #include "sane_ctype.h" |
a2928c42 | 27 | |
a2928c42 | 28 | #include <elf.h> |
f1617b40 | 29 | #include <limits.h> |
c506c96b | 30 | #include <symbol/kallsyms.h> |
439d473b | 31 | #include <sys/utsname.h> |
2cdbc46d | 32 | |
be39db9f ACM |
33 | static int dso__load_kernel_sym(struct dso *dso, struct map *map); |
34 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map); | |
608c34de ACM |
35 | static bool symbol__is_idle(const char *name); |
36 | ||
3f067dca ACM |
37 | int vmlinux_path__nr_entries; |
38 | char **vmlinux_path; | |
439d473b | 39 | |
75be6cf4 | 40 | struct symbol_conf symbol_conf = { |
e511db5e NK |
41 | .use_modules = true, |
42 | .try_vmlinux_path = true, | |
43 | .annotate_src = true, | |
44 | .demangle = true, | |
763122ad | 45 | .demangle_kernel = false, |
e511db5e | 46 | .cumulate_callchain = true, |
c8302367 | 47 | .show_hist_headers = true, |
e511db5e | 48 | .symfs = "", |
1e9abf8b | 49 | .event_group = true, |
d8a88dd2 | 50 | .inline_name = true, |
b32d133a ACM |
51 | }; |
52 | ||
44f24cb3 JO |
53 | static enum dso_binary_type binary_type_symtab[] = { |
54 | DSO_BINARY_TYPE__KALLSYMS, | |
55 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
56 | DSO_BINARY_TYPE__JAVA_JIT, | |
57 | DSO_BINARY_TYPE__DEBUGLINK, | |
58 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
d2396999 | 59 | DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO, |
44f24cb3 JO |
60 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
61 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
62 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
63 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
64 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 65 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 66 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 67 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 68 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
69 | DSO_BINARY_TYPE__NOT_FOUND, |
70 | }; | |
71 | ||
028df767 | 72 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 73 | |
a2f1c160 | 74 | static bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 75 | { |
31877908 AB |
76 | symbol_type = toupper(symbol_type); |
77 | ||
6893d4ee ACM |
78 | switch (map_type) { |
79 | case MAP__FUNCTION: | |
80 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 81 | case MAP__VARIABLE: |
31877908 | 82 | return symbol_type == 'D'; |
6893d4ee ACM |
83 | default: |
84 | return false; | |
85 | } | |
86 | } | |
87 | ||
694bf407 AB |
88 | static int prefix_underscores_count(const char *str) |
89 | { | |
90 | const char *tail = str; | |
91 | ||
92 | while (*tail == '_') | |
93 | tail++; | |
94 | ||
95 | return tail - str; | |
96 | } | |
97 | ||
4b3a2716 MH |
98 | const char * __weak arch__normalize_symbol_name(const char *name) |
99 | { | |
100 | return name; | |
101 | } | |
102 | ||
d8040645 PC |
103 | int __weak arch__compare_symbol_names(const char *namea, const char *nameb) |
104 | { | |
105 | return strcmp(namea, nameb); | |
106 | } | |
107 | ||
108 | int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb, | |
109 | unsigned int n) | |
110 | { | |
111 | return strncmp(namea, nameb, n); | |
112 | } | |
113 | ||
fb6d5942 NR |
114 | int __weak arch__choose_best_symbol(struct symbol *syma, |
115 | struct symbol *symb __maybe_unused) | |
116 | { | |
117 | /* Avoid "SyS" kernel syscall aliases */ | |
118 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
119 | return SYMBOL_B; | |
120 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
121 | return SYMBOL_B; | |
122 | ||
123 | return SYMBOL_A; | |
124 | } | |
694bf407 AB |
125 | |
126 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
127 | { | |
128 | s64 a; | |
129 | s64 b; | |
3445432b | 130 | size_t na, nb; |
694bf407 AB |
131 | |
132 | /* Prefer a symbol with non zero length */ | |
133 | a = syma->end - syma->start; | |
134 | b = symb->end - symb->start; | |
135 | if ((b == 0) && (a > 0)) | |
136 | return SYMBOL_A; | |
137 | else if ((a == 0) && (b > 0)) | |
138 | return SYMBOL_B; | |
139 | ||
140 | /* Prefer a non weak symbol over a weak one */ | |
141 | a = syma->binding == STB_WEAK; | |
142 | b = symb->binding == STB_WEAK; | |
143 | if (b && !a) | |
144 | return SYMBOL_A; | |
145 | if (a && !b) | |
146 | return SYMBOL_B; | |
147 | ||
148 | /* Prefer a global symbol over a non global one */ | |
149 | a = syma->binding == STB_GLOBAL; | |
150 | b = symb->binding == STB_GLOBAL; | |
151 | if (a && !b) | |
152 | return SYMBOL_A; | |
153 | if (b && !a) | |
154 | return SYMBOL_B; | |
155 | ||
156 | /* Prefer a symbol with less underscores */ | |
157 | a = prefix_underscores_count(syma->name); | |
158 | b = prefix_underscores_count(symb->name); | |
159 | if (b > a) | |
160 | return SYMBOL_A; | |
161 | else if (a > b) | |
162 | return SYMBOL_B; | |
163 | ||
3445432b AH |
164 | /* Choose the symbol with the longest name */ |
165 | na = strlen(syma->name); | |
166 | nb = strlen(symb->name); | |
167 | if (na > nb) | |
694bf407 | 168 | return SYMBOL_A; |
3445432b | 169 | else if (na < nb) |
694bf407 | 170 | return SYMBOL_B; |
3445432b | 171 | |
fb6d5942 | 172 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
173 | } |
174 | ||
e5a1845f | 175 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
176 | { |
177 | struct rb_node *nd; | |
178 | struct symbol *curr, *next; | |
179 | ||
c97b40e4 ACM |
180 | if (symbol_conf.allow_aliases) |
181 | return; | |
182 | ||
694bf407 AB |
183 | nd = rb_first(symbols); |
184 | ||
185 | while (nd) { | |
186 | curr = rb_entry(nd, struct symbol, rb_node); | |
187 | again: | |
188 | nd = rb_next(&curr->rb_node); | |
189 | next = rb_entry(nd, struct symbol, rb_node); | |
190 | ||
191 | if (!nd) | |
192 | break; | |
193 | ||
194 | if (curr->start != next->start) | |
195 | continue; | |
196 | ||
197 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
198 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 199 | symbol__delete(next); |
694bf407 AB |
200 | goto again; |
201 | } else { | |
202 | nd = rb_next(&curr->rb_node); | |
203 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 204 | symbol__delete(curr); |
694bf407 AB |
205 | } |
206 | } | |
207 | } | |
208 | ||
e5a1845f | 209 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 210 | { |
aeafcbaf | 211 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 212 | struct symbol *curr, *prev; |
af427bf5 ACM |
213 | |
214 | if (prevnd == NULL) | |
215 | return; | |
216 | ||
2e538c4a ACM |
217 | curr = rb_entry(prevnd, struct symbol, rb_node); |
218 | ||
af427bf5 | 219 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
220 | prev = curr; |
221 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 222 | |
3b01a413 | 223 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 224 | prev->end = curr->start; |
af427bf5 | 225 | } |
2e538c4a ACM |
226 | |
227 | /* Last entry */ | |
228 | if (curr->end == curr->start) | |
e7ede72a | 229 | curr->end = roundup(curr->start, 4096) + 4096; |
af427bf5 ACM |
230 | } |
231 | ||
e5a1845f | 232 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 | 233 | { |
1eee78ae | 234 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 235 | struct map *next, *curr; |
af427bf5 | 236 | |
0a7c74ea | 237 | down_write(&maps->lock); |
6a2ffcdd | 238 | |
4bb7123d ACM |
239 | curr = maps__first(maps); |
240 | if (curr == NULL) | |
6a2ffcdd | 241 | goto out_unlock; |
af427bf5 | 242 | |
4bb7123d | 243 | for (next = map__next(curr); next; next = map__next(curr)) { |
9ad4652b TR |
244 | if (!curr->end) |
245 | curr->end = next->start; | |
4bb7123d | 246 | curr = next; |
2e538c4a | 247 | } |
90c83218 ACM |
248 | |
249 | /* | |
250 | * We still haven't the actual symbols, so guess the | |
251 | * last map final address. | |
252 | */ | |
9ad4652b TR |
253 | if (!curr->end) |
254 | curr->end = ~0ULL; | |
6a2ffcdd ACM |
255 | |
256 | out_unlock: | |
0a7c74ea | 257 | up_write(&maps->lock); |
af427bf5 ACM |
258 | } |
259 | ||
af30bffa | 260 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name) |
a2928c42 | 261 | { |
0085c954 | 262 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
263 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
264 | sizeof(*sym) + namelen)); | |
265 | if (sym == NULL) | |
0b73da3f IM |
266 | return NULL; |
267 | ||
b01141f4 ACM |
268 | if (symbol_conf.priv_size) { |
269 | if (symbol_conf.init_annotation) { | |
270 | struct annotation *notes = (void *)sym; | |
271 | pthread_mutex_init(¬es->lock, NULL); | |
272 | } | |
aeafcbaf | 273 | sym = ((void *)sym) + symbol_conf.priv_size; |
b01141f4 | 274 | } |
e4204992 | 275 | |
aeafcbaf | 276 | sym->start = start; |
2c241bd3 | 277 | sym->end = len ? start + len : start; |
af30bffa | 278 | sym->type = type; |
aeafcbaf ACM |
279 | sym->binding = binding; |
280 | sym->namelen = namelen - 1; | |
e4204992 | 281 | |
aeafcbaf ACM |
282 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
283 | __func__, name, start, sym->end); | |
284 | memcpy(sym->name, name, namelen); | |
a2928c42 | 285 | |
aeafcbaf | 286 | return sym; |
a2928c42 ACM |
287 | } |
288 | ||
aeafcbaf | 289 | void symbol__delete(struct symbol *sym) |
a2928c42 | 290 | { |
aeafcbaf | 291 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
292 | } |
293 | ||
cdd059d7 | 294 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
295 | { |
296 | struct symbol *pos; | |
aeafcbaf | 297 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
298 | |
299 | while (next) { | |
300 | pos = rb_entry(next, struct symbol, rb_node); | |
301 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 302 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 303 | symbol__delete(pos); |
a2928c42 ACM |
304 | } |
305 | } | |
306 | ||
608c34de | 307 | void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel) |
a2928c42 | 308 | { |
aeafcbaf | 309 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 310 | struct rb_node *parent = NULL; |
9cffa8d5 | 311 | const u64 ip = sym->start; |
a2928c42 ACM |
312 | struct symbol *s; |
313 | ||
608c34de ACM |
314 | if (kernel) { |
315 | const char *name = sym->name; | |
316 | /* | |
317 | * ppc64 uses function descriptors and appends a '.' to the | |
318 | * start of every instruction address. Remove it. | |
319 | */ | |
320 | if (name[0] == '.') | |
321 | name++; | |
322 | sym->idle = symbol__is_idle(name); | |
323 | } | |
324 | ||
a2928c42 ACM |
325 | while (*p != NULL) { |
326 | parent = *p; | |
327 | s = rb_entry(parent, struct symbol, rb_node); | |
328 | if (ip < s->start) | |
329 | p = &(*p)->rb_left; | |
330 | else | |
331 | p = &(*p)->rb_right; | |
332 | } | |
333 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 334 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
335 | } |
336 | ||
608c34de ACM |
337 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
338 | { | |
339 | __symbols__insert(symbols, sym, false); | |
340 | } | |
341 | ||
aeafcbaf | 342 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
343 | { |
344 | struct rb_node *n; | |
345 | ||
aeafcbaf | 346 | if (symbols == NULL) |
a2928c42 ACM |
347 | return NULL; |
348 | ||
aeafcbaf | 349 | n = symbols->rb_node; |
a2928c42 ACM |
350 | |
351 | while (n) { | |
352 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
353 | ||
354 | if (ip < s->start) | |
355 | n = n->rb_left; | |
9c7b37cd | 356 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
357 | n = n->rb_right; |
358 | else | |
359 | return s; | |
360 | } | |
361 | ||
362 | return NULL; | |
363 | } | |
364 | ||
8e0cf965 AH |
365 | static struct symbol *symbols__first(struct rb_root *symbols) |
366 | { | |
367 | struct rb_node *n = rb_first(symbols); | |
368 | ||
369 | if (n) | |
370 | return rb_entry(n, struct symbol, rb_node); | |
371 | ||
372 | return NULL; | |
373 | } | |
374 | ||
cd67f99f AH |
375 | static struct symbol *symbols__last(struct rb_root *symbols) |
376 | { | |
377 | struct rb_node *n = rb_last(symbols); | |
378 | ||
379 | if (n) | |
380 | return rb_entry(n, struct symbol, rb_node); | |
381 | ||
382 | return NULL; | |
383 | } | |
384 | ||
9c00a81b AH |
385 | static struct symbol *symbols__next(struct symbol *sym) |
386 | { | |
387 | struct rb_node *n = rb_next(&sym->rb_node); | |
388 | ||
389 | if (n) | |
390 | return rb_entry(n, struct symbol, rb_node); | |
391 | ||
392 | return NULL; | |
393 | } | |
394 | ||
aeafcbaf | 395 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 396 | { |
aeafcbaf | 397 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 398 | struct rb_node *parent = NULL; |
02a9d037 RV |
399 | struct symbol_name_rb_node *symn, *s; |
400 | ||
401 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
402 | |
403 | while (*p != NULL) { | |
404 | parent = *p; | |
405 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
406 | if (strcmp(sym->name, s->sym.name) < 0) | |
407 | p = &(*p)->rb_left; | |
408 | else | |
409 | p = &(*p)->rb_right; | |
410 | } | |
411 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 412 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
413 | } |
414 | ||
aeafcbaf ACM |
415 | static void symbols__sort_by_name(struct rb_root *symbols, |
416 | struct rb_root *source) | |
79406cd7 ACM |
417 | { |
418 | struct rb_node *nd; | |
419 | ||
420 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
421 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 422 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
423 | } |
424 | } | |
425 | ||
d8040645 PC |
426 | int symbol__match_symbol_name(const char *name, const char *str, |
427 | enum symbol_tag_include includes) | |
428 | { | |
429 | const char *versioning; | |
430 | ||
431 | if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY && | |
432 | (versioning = strstr(name, "@@"))) { | |
433 | int len = strlen(str); | |
434 | ||
435 | if (len < versioning - name) | |
436 | len = versioning - name; | |
437 | ||
438 | return arch__compare_symbol_names_n(name, str, len); | |
439 | } else | |
440 | return arch__compare_symbol_names(name, str); | |
441 | } | |
442 | ||
aeafcbaf | 443 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
d8040645 PC |
444 | const char *name, |
445 | enum symbol_tag_include includes) | |
79406cd7 ACM |
446 | { |
447 | struct rb_node *n; | |
5bcaaca3 | 448 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 449 | |
aeafcbaf | 450 | if (symbols == NULL) |
79406cd7 ACM |
451 | return NULL; |
452 | ||
aeafcbaf | 453 | n = symbols->rb_node; |
79406cd7 ACM |
454 | |
455 | while (n) { | |
79406cd7 ACM |
456 | int cmp; |
457 | ||
458 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
d8040645 | 459 | cmp = symbol__match_symbol_name(s->sym.name, name, includes); |
79406cd7 | 460 | |
d8040645 | 461 | if (cmp > 0) |
79406cd7 | 462 | n = n->rb_left; |
d8040645 | 463 | else if (cmp < 0) |
79406cd7 ACM |
464 | n = n->rb_right; |
465 | else | |
de480999 | 466 | break; |
79406cd7 ACM |
467 | } |
468 | ||
de480999 NK |
469 | if (n == NULL) |
470 | return NULL; | |
471 | ||
d8040645 PC |
472 | if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY) |
473 | /* return first symbol that has same name (if any) */ | |
474 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
475 | struct symbol_name_rb_node *tmp; | |
de480999 | 476 | |
d8040645 PC |
477 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); |
478 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) | |
479 | break; | |
de480999 | 480 | |
d8040645 PC |
481 | s = tmp; |
482 | } | |
de480999 NK |
483 | |
484 | return &s->sym; | |
79406cd7 ACM |
485 | } |
486 | ||
c0b4dffb ACM |
487 | void dso__reset_find_symbol_cache(struct dso *dso) |
488 | { | |
489 | enum map_type type; | |
490 | ||
491 | for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) { | |
492 | dso->last_find_result[type].addr = 0; | |
493 | dso->last_find_result[type].symbol = NULL; | |
494 | } | |
495 | } | |
496 | ||
ae93a6c7 CP |
497 | void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym) |
498 | { | |
608c34de | 499 | __symbols__insert(&dso->symbols[type], sym, dso->kernel); |
ae93a6c7 CP |
500 | |
501 | /* update the symbol cache if necessary */ | |
502 | if (dso->last_find_result[type].addr >= sym->start && | |
503 | (dso->last_find_result[type].addr < sym->end || | |
504 | sym->start == sym->end)) { | |
505 | dso->last_find_result[type].symbol = sym; | |
506 | } | |
507 | } | |
508 | ||
af07eeb0 ACM |
509 | struct symbol *__dso__find_symbol(struct dso *dso, |
510 | enum map_type type, u64 addr) | |
fcf1203a | 511 | { |
b843f62a | 512 | if (dso->last_find_result[type].addr != addr || dso->last_find_result[type].symbol == NULL) { |
b685ac22 ACM |
513 | dso->last_find_result[type].addr = addr; |
514 | dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr); | |
515 | } | |
516 | ||
517 | return dso->last_find_result[type].symbol; | |
fcf1203a ACM |
518 | } |
519 | ||
5cf88a63 | 520 | static struct symbol *__dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
521 | { |
522 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
523 | } |
524 | ||
5cf88a63 ACM |
525 | struct symbol *dso__first_symbol(struct dso *dso) |
526 | { | |
527 | return __dso__first_symbol(dso, MAP__FUNCTION); | |
528 | } | |
529 | ||
530 | static struct symbol *__dso__last_symbol(struct dso *dso, enum map_type type) | |
cd67f99f AH |
531 | { |
532 | return symbols__last(&dso->symbols[type]); | |
533 | } | |
534 | ||
5cf88a63 ACM |
535 | struct symbol *dso__last_symbol(struct dso *dso) |
536 | { | |
537 | return __dso__last_symbol(dso, MAP__FUNCTION); | |
538 | } | |
539 | ||
9c00a81b AH |
540 | struct symbol *dso__next_symbol(struct symbol *sym) |
541 | { | |
542 | return symbols__next(sym); | |
8e0cf965 AH |
543 | } |
544 | ||
18bd7264 ACM |
545 | struct symbol *symbol__next_by_name(struct symbol *sym) |
546 | { | |
547 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
548 | struct rb_node *n = rb_next(&s->rb_node); | |
549 | ||
550 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
551 | } | |
552 | ||
553 | /* | |
af07eeb0 | 554 | * Returns first symbol that matched with @name. |
18bd7264 | 555 | */ |
af07eeb0 ACM |
556 | struct symbol *__dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
557 | const char *name) | |
79406cd7 | 558 | { |
d8040645 PC |
559 | struct symbol *s = symbols__find_by_name(&dso->symbol_names[type], name, |
560 | SYMBOL_TAG_INCLUDE__NONE); | |
561 | if (!s) | |
562 | s = symbols__find_by_name(&dso->symbol_names[type], name, | |
563 | SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); | |
564 | return s; | |
79406cd7 ACM |
565 | } |
566 | ||
aeafcbaf | 567 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 568 | { |
aeafcbaf ACM |
569 | dso__set_sorted_by_name(dso, type); |
570 | return symbols__sort_by_name(&dso->symbol_names[type], | |
571 | &dso->symbols[type]); | |
79406cd7 ACM |
572 | } |
573 | ||
316d70d6 AH |
574 | int modules__parse(const char *filename, void *arg, |
575 | int (*process_module)(void *arg, const char *name, | |
9ad4652b | 576 | u64 start, u64 size)) |
316d70d6 AH |
577 | { |
578 | char *line = NULL; | |
579 | size_t n; | |
580 | FILE *file; | |
581 | int err = 0; | |
582 | ||
583 | file = fopen(filename, "r"); | |
584 | if (file == NULL) | |
585 | return -1; | |
586 | ||
587 | while (1) { | |
588 | char name[PATH_MAX]; | |
9ad4652b TR |
589 | u64 start, size; |
590 | char *sep, *endptr; | |
316d70d6 AH |
591 | ssize_t line_len; |
592 | ||
593 | line_len = getline(&line, &n, file); | |
594 | if (line_len < 0) { | |
595 | if (feof(file)) | |
596 | break; | |
597 | err = -1; | |
598 | goto out; | |
599 | } | |
600 | ||
601 | if (!line) { | |
602 | err = -1; | |
603 | goto out; | |
604 | } | |
605 | ||
606 | line[--line_len] = '\0'; /* \n */ | |
607 | ||
608 | sep = strrchr(line, 'x'); | |
609 | if (sep == NULL) | |
610 | continue; | |
611 | ||
612 | hex2u64(sep + 1, &start); | |
613 | ||
614 | sep = strchr(line, ' '); | |
615 | if (sep == NULL) | |
616 | continue; | |
617 | ||
618 | *sep = '\0'; | |
619 | ||
620 | scnprintf(name, sizeof(name), "[%s]", line); | |
621 | ||
9ad4652b TR |
622 | size = strtoul(sep + 1, &endptr, 0); |
623 | if (*endptr != ' ' && *endptr != '\t') | |
624 | continue; | |
625 | ||
626 | err = process_module(arg, name, start, size); | |
316d70d6 AH |
627 | if (err) |
628 | break; | |
629 | } | |
630 | out: | |
631 | free(line); | |
632 | fclose(file); | |
633 | return err; | |
634 | } | |
635 | ||
682b335a ACM |
636 | struct process_kallsyms_args { |
637 | struct map *map; | |
638 | struct dso *dso; | |
639 | }; | |
640 | ||
e7110b9f ACM |
641 | /* |
642 | * These are symbols in the kernel image, so make sure that | |
643 | * sym is from a kernel DSO. | |
644 | */ | |
608c34de | 645 | static bool symbol__is_idle(const char *name) |
82d1deb0 DA |
646 | { |
647 | const char * const idle_symbols[] = { | |
648 | "cpu_idle", | |
e0336ed6 | 649 | "cpu_startup_entry", |
82d1deb0 DA |
650 | "intel_idle", |
651 | "default_idle", | |
652 | "native_safe_halt", | |
653 | "enter_idle", | |
654 | "exit_idle", | |
655 | "mwait_idle", | |
656 | "mwait_idle_with_hints", | |
657 | "poll_idle", | |
658 | "ppc64_runlatch_off", | |
659 | "pseries_dedicated_idle_sleep", | |
660 | NULL | |
661 | }; | |
82d1deb0 DA |
662 | int i; |
663 | ||
82d1deb0 | 664 | for (i = 0; idle_symbols[i]; i++) { |
608c34de | 665 | if (!strcmp(idle_symbols[i], name)) |
82d1deb0 DA |
666 | return true; |
667 | } | |
668 | ||
669 | return false; | |
670 | } | |
671 | ||
682b335a | 672 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 673 | char type, u64 start) |
682b335a ACM |
674 | { |
675 | struct symbol *sym; | |
676 | struct process_kallsyms_args *a = arg; | |
677 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
678 | ||
679 | if (!symbol_type__is_a(type, a->map->type)) | |
680 | return 0; | |
681 | ||
82151520 CS |
682 | /* |
683 | * module symbols are not sorted so we add all | |
684 | * symbols, setting length to 0, and rely on | |
685 | * symbols__fixup_end() to fix it up. | |
686 | */ | |
af30bffa | 687 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), kallsyms2elf_type(type), name); |
682b335a ACM |
688 | if (sym == NULL) |
689 | return -ENOMEM; | |
690 | /* | |
691 | * We will pass the symbols to the filter later, in | |
692 | * map__split_kallsyms, when we have split the maps per module | |
693 | */ | |
608c34de | 694 | __symbols__insert(root, sym, !strchr(name, '[')); |
a1645ce1 | 695 | |
682b335a ACM |
696 | return 0; |
697 | } | |
698 | ||
699 | /* | |
700 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
701 | * so that we can in the next step set the symbol ->end address and then | |
702 | * call kernel_maps__split_kallsyms. | |
703 | */ | |
aeafcbaf | 704 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 705 | struct map *map) |
682b335a | 706 | { |
aeafcbaf | 707 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 708 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
709 | } |
710 | ||
be39db9f | 711 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map) |
8e0cf965 | 712 | { |
ba92732e | 713 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
714 | struct map *curr_map; |
715 | struct symbol *pos; | |
866548dd AH |
716 | int count = 0; |
717 | struct rb_root old_root = dso->symbols[map->type]; | |
8e0cf965 AH |
718 | struct rb_root *root = &dso->symbols[map->type]; |
719 | struct rb_node *next = rb_first(root); | |
720 | ||
ba92732e WN |
721 | if (!kmaps) |
722 | return -1; | |
723 | ||
866548dd AH |
724 | *root = RB_ROOT; |
725 | ||
8e0cf965 AH |
726 | while (next) { |
727 | char *module; | |
728 | ||
729 | pos = rb_entry(next, struct symbol, rb_node); | |
730 | next = rb_next(&pos->rb_node); | |
731 | ||
866548dd AH |
732 | rb_erase_init(&pos->rb_node, &old_root); |
733 | ||
8e0cf965 AH |
734 | module = strchr(pos->name, '\t'); |
735 | if (module) | |
736 | *module = '\0'; | |
737 | ||
abe5449d | 738 | curr_map = __map_groups__find(kmaps, map->type, pos->start); |
8e0cf965 | 739 | |
be39db9f | 740 | if (!curr_map) { |
8e0cf965 | 741 | symbol__delete(pos); |
866548dd | 742 | continue; |
8e0cf965 | 743 | } |
866548dd AH |
744 | |
745 | pos->start -= curr_map->start - curr_map->pgoff; | |
746 | if (pos->end) | |
747 | pos->end -= curr_map->start - curr_map->pgoff; | |
748 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
749 | ++count; | |
8e0cf965 AH |
750 | } |
751 | ||
752 | /* Symbols have been adjusted */ | |
753 | dso->adjust_symbols = 1; | |
754 | ||
866548dd | 755 | return count; |
8e0cf965 AH |
756 | } |
757 | ||
2e538c4a ACM |
758 | /* |
759 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
760 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
761 | * the original ELF section names vmlinux have. | |
762 | */ | |
be39db9f | 763 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta) |
2e538c4a | 764 | { |
ba92732e WN |
765 | struct map_groups *kmaps = map__kmaps(map); |
766 | struct machine *machine; | |
4e06255f | 767 | struct map *curr_map = map; |
2e538c4a | 768 | struct symbol *pos; |
48000a1a | 769 | int count = 0, moved = 0; |
aeafcbaf | 770 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 771 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
772 | int kernel_range = 0; |
773 | ||
ba92732e WN |
774 | if (!kmaps) |
775 | return -1; | |
776 | ||
777 | machine = kmaps->machine; | |
778 | ||
2e538c4a ACM |
779 | while (next) { |
780 | char *module; | |
781 | ||
782 | pos = rb_entry(next, struct symbol, rb_node); | |
783 | next = rb_next(&pos->rb_node); | |
784 | ||
785 | module = strchr(pos->name, '\t'); | |
786 | if (module) { | |
75be6cf4 | 787 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
788 | goto discard_symbol; |
789 | ||
2e538c4a ACM |
790 | *module++ = '\0'; |
791 | ||
b7cece76 | 792 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 793 | if (curr_map != map && |
aeafcbaf | 794 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 795 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
796 | /* |
797 | * We assume all symbols of a module are | |
798 | * continuous in * kallsyms, so curr_map | |
799 | * points to a module and all its | |
800 | * symbols are in its kmap. Mark it as | |
801 | * loaded. | |
802 | */ | |
803 | dso__set_loaded(curr_map->dso, | |
804 | curr_map->type); | |
805 | } | |
806 | ||
83cf774b | 807 | curr_map = __map_groups__find_by_name(kmaps, map->type, module); |
4e06255f | 808 | if (curr_map == NULL) { |
2f51903b | 809 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 810 | "inconsistency while looking " |
a1645ce1 | 811 | "for \"%s\" module!\n", |
23346f21 | 812 | machine->root_dir, module); |
a1645ce1 ZY |
813 | curr_map = map; |
814 | goto discard_symbol; | |
af427bf5 | 815 | } |
b7cece76 | 816 | |
a1645ce1 | 817 | if (curr_map->dso->loaded && |
23346f21 | 818 | !machine__is_default_guest(machine)) |
b7cece76 | 819 | goto discard_symbol; |
af427bf5 | 820 | } |
2e538c4a ACM |
821 | /* |
822 | * So that we look just like we get from .ko files, | |
823 | * i.e. not prelinked, relative to map->start. | |
824 | */ | |
4e06255f ACM |
825 | pos->start = curr_map->map_ip(curr_map, pos->start); |
826 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
827 | } else if (curr_map != map) { | |
2e538c4a | 828 | char dso_name[PATH_MAX]; |
aeafcbaf | 829 | struct dso *ndso; |
2e538c4a | 830 | |
d9b62aba AH |
831 | if (delta) { |
832 | /* Kernel was relocated at boot time */ | |
833 | pos->start -= delta; | |
834 | pos->end -= delta; | |
835 | } | |
836 | ||
8a953312 ACM |
837 | if (count == 0) { |
838 | curr_map = map; | |
be39db9f | 839 | goto add_symbol; |
8a953312 ACM |
840 | } |
841 | ||
aeafcbaf | 842 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
843 | snprintf(dso_name, sizeof(dso_name), |
844 | "[guest.kernel].%d", | |
845 | kernel_range++); | |
846 | else | |
847 | snprintf(dso_name, sizeof(dso_name), | |
848 | "[kernel].%d", | |
849 | kernel_range++); | |
2e538c4a | 850 | |
aeafcbaf ACM |
851 | ndso = dso__new(dso_name); |
852 | if (ndso == NULL) | |
2e538c4a ACM |
853 | return -1; |
854 | ||
aeafcbaf | 855 | ndso->kernel = dso->kernel; |
a1645ce1 | 856 | |
aeafcbaf | 857 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 858 | if (curr_map == NULL) { |
d3a7c489 | 859 | dso__put(ndso); |
2e538c4a ACM |
860 | return -1; |
861 | } | |
a2928c42 | 862 | |
4e06255f | 863 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 864 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 865 | ++kernel_range; |
d9b62aba AH |
866 | } else if (delta) { |
867 | /* Kernel was relocated at boot time */ | |
868 | pos->start -= delta; | |
869 | pos->end -= delta; | |
2e538c4a | 870 | } |
be39db9f ACM |
871 | add_symbol: |
872 | if (curr_map != map) { | |
873 | rb_erase(&pos->rb_node, root); | |
874 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
875 | ++moved; | |
876 | } else | |
877 | ++count; | |
878 | ||
879 | continue; | |
880 | discard_symbol: | |
881 | rb_erase(&pos->rb_node, root); | |
882 | symbol__delete(pos); | |
a2928c42 ACM |
883 | } |
884 | ||
a1645ce1 | 885 | if (curr_map != map && |
aeafcbaf | 886 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 887 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
888 | dso__set_loaded(curr_map->dso, curr_map->type); |
889 | } | |
890 | ||
8a953312 | 891 | return count + moved; |
2e538c4a | 892 | } |
a2928c42 | 893 | |
3f067dca ACM |
894 | bool symbol__restricted_filename(const char *filename, |
895 | const char *restricted_filename) | |
ec80fde7 ACM |
896 | { |
897 | bool restricted = false; | |
898 | ||
899 | if (symbol_conf.kptr_restrict) { | |
900 | char *r = realpath(filename, NULL); | |
901 | ||
902 | if (r != NULL) { | |
903 | restricted = strcmp(r, restricted_filename) == 0; | |
904 | free(r); | |
905 | return restricted; | |
906 | } | |
907 | } | |
908 | ||
909 | return restricted; | |
910 | } | |
911 | ||
52afdaf9 AH |
912 | struct module_info { |
913 | struct rb_node rb_node; | |
914 | char *name; | |
915 | u64 start; | |
8e0cf965 AH |
916 | }; |
917 | ||
52afdaf9 | 918 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 919 | { |
52afdaf9 AH |
920 | struct rb_node **p = &modules->rb_node; |
921 | struct rb_node *parent = NULL; | |
922 | struct module_info *m; | |
8e0cf965 | 923 | |
52afdaf9 AH |
924 | while (*p != NULL) { |
925 | parent = *p; | |
926 | m = rb_entry(parent, struct module_info, rb_node); | |
927 | if (strcmp(mi->name, m->name) < 0) | |
928 | p = &(*p)->rb_left; | |
929 | else | |
930 | p = &(*p)->rb_right; | |
931 | } | |
932 | rb_link_node(&mi->rb_node, parent, p); | |
933 | rb_insert_color(&mi->rb_node, modules); | |
934 | } | |
935 | ||
936 | static void delete_modules(struct rb_root *modules) | |
937 | { | |
938 | struct module_info *mi; | |
939 | struct rb_node *next = rb_first(modules); | |
940 | ||
941 | while (next) { | |
942 | mi = rb_entry(next, struct module_info, rb_node); | |
943 | next = rb_next(&mi->rb_node); | |
944 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 945 | zfree(&mi->name); |
52afdaf9 AH |
946 | free(mi); |
947 | } | |
948 | } | |
949 | ||
950 | static struct module_info *find_module(const char *name, | |
951 | struct rb_root *modules) | |
952 | { | |
953 | struct rb_node *n = modules->rb_node; | |
954 | ||
955 | while (n) { | |
956 | struct module_info *m; | |
957 | int cmp; | |
958 | ||
959 | m = rb_entry(n, struct module_info, rb_node); | |
960 | cmp = strcmp(name, m->name); | |
961 | if (cmp < 0) | |
962 | n = n->rb_left; | |
963 | else if (cmp > 0) | |
964 | n = n->rb_right; | |
965 | else | |
966 | return m; | |
967 | } | |
968 | ||
969 | return NULL; | |
970 | } | |
971 | ||
9ad4652b TR |
972 | static int __read_proc_modules(void *arg, const char *name, u64 start, |
973 | u64 size __maybe_unused) | |
52afdaf9 AH |
974 | { |
975 | struct rb_root *modules = arg; | |
976 | struct module_info *mi; | |
977 | ||
978 | mi = zalloc(sizeof(struct module_info)); | |
979 | if (!mi) | |
8e0cf965 AH |
980 | return -ENOMEM; |
981 | ||
52afdaf9 AH |
982 | mi->name = strdup(name); |
983 | mi->start = start; | |
8e0cf965 | 984 | |
52afdaf9 AH |
985 | if (!mi->name) { |
986 | free(mi); | |
987 | return -ENOMEM; | |
988 | } | |
989 | ||
990 | add_module(mi, modules); | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
996 | { | |
997 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
998 | return -1; | |
999 | ||
1000 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
1001 | delete_modules(modules); | |
1002 | return -1; | |
1003 | } | |
8e0cf965 AH |
1004 | |
1005 | return 0; | |
1006 | } | |
1007 | ||
fc1b691d AH |
1008 | int compare_proc_modules(const char *from, const char *to) |
1009 | { | |
1010 | struct rb_root from_modules = RB_ROOT; | |
1011 | struct rb_root to_modules = RB_ROOT; | |
1012 | struct rb_node *from_node, *to_node; | |
1013 | struct module_info *from_m, *to_m; | |
1014 | int ret = -1; | |
1015 | ||
1016 | if (read_proc_modules(from, &from_modules)) | |
1017 | return -1; | |
1018 | ||
1019 | if (read_proc_modules(to, &to_modules)) | |
1020 | goto out_delete_from; | |
1021 | ||
1022 | from_node = rb_first(&from_modules); | |
1023 | to_node = rb_first(&to_modules); | |
1024 | while (from_node) { | |
1025 | if (!to_node) | |
1026 | break; | |
1027 | ||
1028 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
1029 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
1030 | ||
1031 | if (from_m->start != to_m->start || | |
1032 | strcmp(from_m->name, to_m->name)) | |
1033 | break; | |
1034 | ||
1035 | from_node = rb_next(from_node); | |
1036 | to_node = rb_next(to_node); | |
1037 | } | |
1038 | ||
1039 | if (!from_node && !to_node) | |
1040 | ret = 0; | |
1041 | ||
1042 | delete_modules(&to_modules); | |
1043 | out_delete_from: | |
1044 | delete_modules(&from_modules); | |
1045 | ||
1046 | return ret; | |
1047 | } | |
1048 | ||
dce0478b ACM |
1049 | static struct map *__map_groups__first(struct map_groups *mg, enum map_type type) |
1050 | { | |
1051 | return maps__first(&mg->maps[type]); | |
1052 | } | |
1053 | ||
1054 | struct map *map_groups__first(struct map_groups *mg) | |
1055 | { | |
1056 | return __map_groups__first(mg, MAP__FUNCTION); | |
1057 | } | |
1058 | ||
52afdaf9 AH |
1059 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
1060 | struct map_groups *kmaps) | |
1061 | { | |
1062 | struct rb_root modules = RB_ROOT; | |
1063 | struct map *old_map; | |
1064 | int err; | |
1065 | ||
1066 | err = read_proc_modules(filename, &modules); | |
1067 | if (err) | |
1068 | return err; | |
1069 | ||
dce0478b | 1070 | old_map = __map_groups__first(kmaps, map->type); |
52afdaf9 AH |
1071 | while (old_map) { |
1072 | struct map *next = map_groups__next(old_map); | |
1073 | struct module_info *mi; | |
1074 | ||
1075 | if (old_map == map || old_map->start == map->start) { | |
1076 | /* The kernel map */ | |
1077 | old_map = next; | |
1078 | continue; | |
1079 | } | |
1080 | ||
1081 | /* Module must be in memory at the same address */ | |
1082 | mi = find_module(old_map->dso->short_name, &modules); | |
1083 | if (!mi || mi->start != old_map->start) { | |
1084 | err = -EINVAL; | |
1085 | goto out; | |
1086 | } | |
1087 | ||
1088 | old_map = next; | |
1089 | } | |
1090 | out: | |
1091 | delete_modules(&modules); | |
1092 | return err; | |
1093 | } | |
1094 | ||
8e0cf965 | 1095 | /* |
52afdaf9 | 1096 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1097 | * directory. |
1098 | */ | |
52afdaf9 AH |
1099 | static bool filename_from_kallsyms_filename(char *filename, |
1100 | const char *base_name, | |
1101 | const char *kallsyms_filename) | |
8e0cf965 AH |
1102 | { |
1103 | char *name; | |
1104 | ||
52afdaf9 AH |
1105 | strcpy(filename, kallsyms_filename); |
1106 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1107 | if (!name) |
1108 | return false; | |
1109 | ||
52afdaf9 AH |
1110 | name += 1; |
1111 | ||
1112 | if (!strcmp(name, "kallsyms")) { | |
1113 | strcpy(name, base_name); | |
8e0cf965 AH |
1114 | return true; |
1115 | } | |
1116 | ||
1117 | return false; | |
1118 | } | |
1119 | ||
52afdaf9 AH |
1120 | static int validate_kcore_modules(const char *kallsyms_filename, |
1121 | struct map *map) | |
1122 | { | |
ba92732e | 1123 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1124 | char modules_filename[PATH_MAX]; |
1125 | ||
ba92732e WN |
1126 | if (!kmaps) |
1127 | return -EINVAL; | |
1128 | ||
52afdaf9 AH |
1129 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1130 | kallsyms_filename)) | |
1131 | return -EINVAL; | |
1132 | ||
1133 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1134 | return -EINVAL; | |
1135 | ||
1136 | return 0; | |
1137 | } | |
1138 | ||
a00d28cb AH |
1139 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1140 | struct map *map) | |
1141 | { | |
1142 | struct kmap *kmap = map__kmap(map); | |
1143 | ||
ba92732e WN |
1144 | if (!kmap) |
1145 | return -EINVAL; | |
1146 | ||
a00d28cb AH |
1147 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1148 | u64 start; | |
1149 | ||
b843f62a ACM |
1150 | if (kallsyms__get_function_start(kallsyms_filename, |
1151 | kmap->ref_reloc_sym->name, &start)) | |
1152 | return -ENOENT; | |
a00d28cb AH |
1153 | if (start != kmap->ref_reloc_sym->addr) |
1154 | return -EINVAL; | |
1155 | } | |
1156 | ||
1157 | return validate_kcore_modules(kallsyms_filename, map); | |
1158 | } | |
1159 | ||
52afdaf9 AH |
1160 | struct kcore_mapfn_data { |
1161 | struct dso *dso; | |
1162 | enum map_type type; | |
1163 | struct list_head maps; | |
1164 | }; | |
1165 | ||
1166 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1167 | { | |
1168 | struct kcore_mapfn_data *md = data; | |
1169 | struct map *map; | |
1170 | ||
1171 | map = map__new2(start, md->dso, md->type); | |
1172 | if (map == NULL) | |
1173 | return -ENOMEM; | |
1174 | ||
1175 | map->end = map->start + len; | |
1176 | map->pgoff = pgoff; | |
1177 | ||
1178 | list_add(&map->node, &md->maps); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
8e0cf965 AH |
1183 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1184 | const char *kallsyms_filename) | |
1185 | { | |
ba92732e | 1186 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
1187 | struct kcore_mapfn_data md; |
1188 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1189 | bool is_64_bit; | |
1190 | int err, fd; | |
1191 | char kcore_filename[PATH_MAX]; | |
1192 | struct symbol *sym; | |
1193 | ||
ba92732e WN |
1194 | if (!kmaps) |
1195 | return -EINVAL; | |
1196 | ||
8e0cf965 | 1197 | /* This function requires that the map is the kernel map */ |
efdd5c6b | 1198 | if (!__map__is_kernel(map)) |
8e0cf965 AH |
1199 | return -EINVAL; |
1200 | ||
52afdaf9 AH |
1201 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1202 | kallsyms_filename)) | |
1203 | return -EINVAL; | |
1204 | ||
a00d28cb AH |
1205 | /* Modules and kernel must be present at their original addresses */ |
1206 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1207 | return -EINVAL; |
1208 | ||
1209 | md.dso = dso; | |
1210 | md.type = map->type; | |
1211 | INIT_LIST_HEAD(&md.maps); | |
1212 | ||
1213 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1214 | if (fd < 0) { |
133de940 AH |
1215 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1216 | kcore_filename); | |
8e0cf965 | 1217 | return -EINVAL; |
36c8bb56 | 1218 | } |
8e0cf965 AH |
1219 | |
1220 | /* Read new maps into temporary lists */ | |
e9814df8 | 1221 | err = file__read_maps(fd, map->prot & PROT_EXEC, kcore_mapfn, &md, |
8e0cf965 AH |
1222 | &is_64_bit); |
1223 | if (err) | |
1224 | goto out_err; | |
c6d8f2a4 | 1225 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1226 | |
1227 | if (list_empty(&md.maps)) { | |
1228 | err = -EINVAL; | |
1229 | goto out_err; | |
1230 | } | |
1231 | ||
1232 | /* Remove old maps */ | |
dce0478b | 1233 | old_map = __map_groups__first(kmaps, map->type); |
8e0cf965 AH |
1234 | while (old_map) { |
1235 | struct map *next = map_groups__next(old_map); | |
1236 | ||
1237 | if (old_map != map) | |
1238 | map_groups__remove(kmaps, old_map); | |
1239 | old_map = next; | |
1240 | } | |
1241 | ||
1242 | /* Find the kernel map using the first symbol */ | |
5cf88a63 | 1243 | sym = __dso__first_symbol(dso, map->type); |
8e0cf965 AH |
1244 | list_for_each_entry(new_map, &md.maps, node) { |
1245 | if (sym && sym->start >= new_map->start && | |
1246 | sym->start < new_map->end) { | |
1247 | replacement_map = new_map; | |
1248 | break; | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | if (!replacement_map) | |
1253 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1254 | ||
1255 | /* Add new maps */ | |
1256 | while (!list_empty(&md.maps)) { | |
1257 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1258 | list_del_init(&new_map->node); |
8e0cf965 AH |
1259 | if (new_map == replacement_map) { |
1260 | map->start = new_map->start; | |
1261 | map->end = new_map->end; | |
1262 | map->pgoff = new_map->pgoff; | |
1263 | map->map_ip = new_map->map_ip; | |
1264 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1265 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1266 | map__get(map); |
8e0cf965 AH |
1267 | map_groups__remove(kmaps, map); |
1268 | map_groups__insert(kmaps, map); | |
84c2cafa | 1269 | map__put(map); |
8e0cf965 AH |
1270 | } else { |
1271 | map_groups__insert(kmaps, new_map); | |
1272 | } | |
84c2cafa ACM |
1273 | |
1274 | map__put(new_map); | |
8e0cf965 AH |
1275 | } |
1276 | ||
1277 | /* | |
1278 | * Set the data type and long name so that kcore can be read via | |
1279 | * dso__data_read_addr(). | |
1280 | */ | |
1281 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1282 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1283 | else |
5f70619d | 1284 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1285 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1286 | |
1287 | close(fd); | |
1288 | ||
e9814df8 | 1289 | if (map->prot & PROT_EXEC) |
8e0cf965 AH |
1290 | pr_debug("Using %s for kernel object code\n", kcore_filename); |
1291 | else | |
1292 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1293 | ||
1294 | return 0; | |
1295 | ||
1296 | out_err: | |
1297 | while (!list_empty(&md.maps)) { | |
1298 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1299 | list_del_init(&map->node); |
84c2cafa | 1300 | map__put(map); |
8e0cf965 AH |
1301 | } |
1302 | close(fd); | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | ||
d9b62aba AH |
1306 | /* |
1307 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1308 | * delta based on the relocation reference symbol. | |
1309 | */ | |
1310 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1311 | { | |
1312 | struct kmap *kmap = map__kmap(map); | |
1313 | u64 addr; | |
1314 | ||
ba92732e WN |
1315 | if (!kmap) |
1316 | return -1; | |
1317 | ||
d9b62aba AH |
1318 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) |
1319 | return 0; | |
1320 | ||
b843f62a | 1321 | if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr)) |
d9b62aba AH |
1322 | return -1; |
1323 | ||
1324 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1325 | return 0; | |
1326 | } | |
1327 | ||
e02092b9 | 1328 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1329 | struct map *map, bool no_kcore) |
2e538c4a | 1330 | { |
d9b62aba AH |
1331 | u64 delta = 0; |
1332 | ||
ec80fde7 ACM |
1333 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1334 | return -1; | |
1335 | ||
aeafcbaf | 1336 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1337 | return -1; |
1338 | ||
d9b62aba AH |
1339 | if (kallsyms__delta(map, filename, &delta)) |
1340 | return -1; | |
1341 | ||
3f5a4272 | 1342 | symbols__fixup_end(&dso->symbols[map->type]); |
432746f8 | 1343 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 | 1344 | |
aeafcbaf | 1345 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1346 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1347 | else |
44f24cb3 | 1348 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1349 | |
e02092b9 | 1350 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
be39db9f | 1351 | return dso__split_kallsyms_for_kcore(dso, map); |
8e0cf965 | 1352 | else |
be39db9f | 1353 | return dso__split_kallsyms(dso, map, delta); |
af427bf5 ACM |
1354 | } |
1355 | ||
e02092b9 | 1356 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1357 | struct map *map) |
e02092b9 | 1358 | { |
be39db9f | 1359 | return __dso__load_kallsyms(dso, filename, map, false); |
e02092b9 ACM |
1360 | } |
1361 | ||
bf2e710b KJ |
1362 | static int dso__load_perf_map(const char *map_path, struct dso *dso, |
1363 | struct map *map) | |
80d496be PE |
1364 | { |
1365 | char *line = NULL; | |
1366 | size_t n; | |
1367 | FILE *file; | |
1368 | int nr_syms = 0; | |
1369 | ||
bf2e710b | 1370 | file = fopen(map_path, "r"); |
80d496be PE |
1371 | if (file == NULL) |
1372 | goto out_failure; | |
1373 | ||
1374 | while (!feof(file)) { | |
9cffa8d5 | 1375 | u64 start, size; |
80d496be PE |
1376 | struct symbol *sym; |
1377 | int line_len, len; | |
1378 | ||
1379 | line_len = getline(&line, &n, file); | |
1380 | if (line_len < 0) | |
1381 | break; | |
1382 | ||
1383 | if (!line) | |
1384 | goto out_failure; | |
1385 | ||
1386 | line[--line_len] = '\0'; /* \n */ | |
1387 | ||
1388 | len = hex2u64(line, &start); | |
1389 | ||
1390 | len++; | |
1391 | if (len + 2 >= line_len) | |
1392 | continue; | |
1393 | ||
1394 | len += hex2u64(line + len, &size); | |
1395 | ||
1396 | len++; | |
1397 | if (len + 2 >= line_len) | |
1398 | continue; | |
1399 | ||
af30bffa | 1400 | sym = symbol__new(start, size, STB_GLOBAL, STT_FUNC, line + len); |
80d496be PE |
1401 | |
1402 | if (sym == NULL) | |
1403 | goto out_delete_line; | |
1404 | ||
be39db9f ACM |
1405 | symbols__insert(&dso->symbols[map->type], sym); |
1406 | nr_syms++; | |
80d496be PE |
1407 | } |
1408 | ||
1409 | free(line); | |
1410 | fclose(file); | |
1411 | ||
1412 | return nr_syms; | |
1413 | ||
1414 | out_delete_line: | |
1415 | free(line); | |
1416 | out_failure: | |
1417 | return -1; | |
1418 | } | |
1419 | ||
1029f9fe NK |
1420 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1421 | enum dso_binary_type type) | |
1422 | { | |
1423 | switch (type) { | |
1424 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1425 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1426 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1427 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1428 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1429 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1430 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1431 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1432 | ||
1433 | case DSO_BINARY_TYPE__KALLSYMS: | |
1434 | case DSO_BINARY_TYPE__VMLINUX: | |
1435 | case DSO_BINARY_TYPE__KCORE: | |
1436 | return dso->kernel == DSO_TYPE_KERNEL; | |
1437 | ||
1438 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1439 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1440 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1441 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1442 | ||
1443 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1444 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1445 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1446 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1447 | /* |
1448 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1449 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1450 | */ |
1451 | return kmod && dso->symtab_type == type; | |
1452 | ||
1453 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
d2396999 | 1454 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
1029f9fe NK |
1455 | return true; |
1456 | ||
1457 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1458 | default: | |
1459 | return false; | |
1460 | } | |
1461 | } | |
1462 | ||
bf2e710b KJ |
1463 | /* Checks for the existence of the perf-<pid>.map file in two different |
1464 | * locations. First, if the process is a separate mount namespace, check in | |
1465 | * that namespace using the pid of the innermost pid namespace. If's not in a | |
1466 | * namespace, or the file can't be found there, try in the mount namespace of | |
1467 | * the tracing process using our view of its pid. | |
1468 | */ | |
1469 | static int dso__find_perf_map(char *filebuf, size_t bufsz, | |
1470 | struct nsinfo **nsip) | |
1471 | { | |
1472 | struct nscookie nsc; | |
1473 | struct nsinfo *nsi; | |
1474 | struct nsinfo *nnsi; | |
1475 | int rc = -1; | |
1476 | ||
1477 | nsi = *nsip; | |
1478 | ||
1479 | if (nsi->need_setns) { | |
1480 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid); | |
1481 | nsinfo__mountns_enter(nsi, &nsc); | |
1482 | rc = access(filebuf, R_OK); | |
1483 | nsinfo__mountns_exit(&nsc); | |
1484 | if (rc == 0) | |
1485 | return rc; | |
1486 | } | |
1487 | ||
1488 | nnsi = nsinfo__copy(nsi); | |
1489 | if (nnsi) { | |
1490 | nsinfo__put(nsi); | |
1491 | ||
1492 | nnsi->need_setns = false; | |
1493 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid); | |
1494 | *nsip = nnsi; | |
1495 | rc = 0; | |
1496 | } | |
1497 | ||
1498 | return rc; | |
1499 | } | |
1500 | ||
be39db9f | 1501 | int dso__load(struct dso *dso, struct map *map) |
a2928c42 | 1502 | { |
c338aee8 | 1503 | char *name; |
a2928c42 | 1504 | int ret = -1; |
44f24cb3 | 1505 | u_int i; |
23346f21 | 1506 | struct machine *machine; |
44f24cb3 | 1507 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1508 | int ss_pos = 0; |
1509 | struct symsrc ss_[2]; | |
1510 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1511 | bool kmod; |
bf2e710b | 1512 | bool perfmap; |
5baecbcd | 1513 | unsigned char build_id[BUILD_ID_SIZE]; |
843ff37b | 1514 | struct nscookie nsc; |
bf2e710b KJ |
1515 | char newmapname[PATH_MAX]; |
1516 | const char *map_path = dso->long_name; | |
1517 | ||
1518 | perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0; | |
1519 | if (perfmap) { | |
1520 | if (dso->nsinfo && (dso__find_perf_map(newmapname, | |
1521 | sizeof(newmapname), &dso->nsinfo) == 0)) { | |
1522 | map_path = newmapname; | |
1523 | } | |
1524 | } | |
a2928c42 | 1525 | |
843ff37b | 1526 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
4a936edc NK |
1527 | pthread_mutex_lock(&dso->lock); |
1528 | ||
1529 | /* check again under the dso->lock */ | |
1530 | if (dso__loaded(dso, map->type)) { | |
1531 | ret = 1; | |
1532 | goto out; | |
1533 | } | |
66bd8424 | 1534 | |
4a936edc NK |
1535 | if (dso->kernel) { |
1536 | if (dso->kernel == DSO_TYPE_KERNEL) | |
be39db9f | 1537 | ret = dso__load_kernel_sym(dso, map); |
4a936edc | 1538 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
be39db9f | 1539 | ret = dso__load_guest_kernel_sym(dso, map); |
4a936edc NK |
1540 | |
1541 | goto out; | |
1542 | } | |
a1645ce1 | 1543 | |
23346f21 ACM |
1544 | if (map->groups && map->groups->machine) |
1545 | machine = map->groups->machine; | |
a1645ce1 | 1546 | else |
23346f21 | 1547 | machine = NULL; |
c338aee8 | 1548 | |
aeafcbaf | 1549 | dso->adjust_symbols = 0; |
f5812a7a | 1550 | |
bf2e710b | 1551 | if (perfmap) { |
981c1252 PE |
1552 | struct stat st; |
1553 | ||
bf2e710b | 1554 | if (lstat(map_path, &st) < 0) |
4a936edc | 1555 | goto out; |
981c1252 | 1556 | |
2059fc7a | 1557 | if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) { |
981c1252 | 1558 | pr_warning("File %s not owned by current user or root, " |
bf2e710b | 1559 | "ignoring it (use -f to override).\n", map_path); |
4a936edc | 1560 | goto out; |
981c1252 PE |
1561 | } |
1562 | ||
bf2e710b | 1563 | ret = dso__load_perf_map(map_path, dso, map); |
44f24cb3 JO |
1564 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1565 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1566 | goto out; |
94cb9e38 ACM |
1567 | } |
1568 | ||
44f24cb3 JO |
1569 | if (machine) |
1570 | root_dir = machine->root_dir; | |
1571 | ||
164c800e DA |
1572 | name = malloc(PATH_MAX); |
1573 | if (!name) | |
4a936edc | 1574 | goto out; |
164c800e | 1575 | |
1029f9fe | 1576 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1577 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1578 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1579 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe | 1580 | |
5baecbcd DK |
1581 | |
1582 | /* | |
1583 | * Read the build id if possible. This is required for | |
1584 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1585 | */ | |
ed6c166c | 1586 | if (!dso->has_build_id && |
9b200653 VK |
1587 | is_regular_file(dso->long_name)) { |
1588 | __symbol__join_symfs(name, PATH_MAX, dso->long_name); | |
1589 | if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0) | |
5baecbcd | 1590 | dso__set_build_id(dso, build_id); |
9b200653 | 1591 | } |
5baecbcd | 1592 | |
1029f9fe NK |
1593 | /* |
1594 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1595 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1596 | * and/or opd section) for processing. | |
6da80ce8 | 1597 | */ |
44f24cb3 | 1598 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1599 | struct symsrc *ss = &ss_[ss_pos]; |
1600 | bool next_slot = false; | |
f045b8c4 | 1601 | bool is_reg; |
d2396999 | 1602 | bool nsexit; |
c3962961 | 1603 | int sirc = -1; |
6da80ce8 | 1604 | |
005f9294 | 1605 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1606 | |
d2396999 KJ |
1607 | nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE || |
1608 | symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO); | |
1609 | ||
1029f9fe NK |
1610 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1611 | continue; | |
1612 | ||
ee4e9625 ACM |
1613 | if (dso__read_binary_type_filename(dso, symtab_type, |
1614 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1615 | continue; |
6da80ce8 | 1616 | |
d2396999 | 1617 | if (nsexit) |
f045b8c4 KJ |
1618 | nsinfo__mountns_exit(&nsc); |
1619 | ||
1620 | is_reg = is_regular_file(name); | |
c3962961 JO |
1621 | if (is_reg) |
1622 | sirc = symsrc__init(ss, dso, name, symtab_type); | |
40356721 | 1623 | |
d2396999 | 1624 | if (nsexit) |
f045b8c4 KJ |
1625 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
1626 | ||
c3962961 | 1627 | if (!is_reg || sirc < 0) |
6da80ce8 | 1628 | continue; |
a2928c42 | 1629 | |
3aafe5ae CS |
1630 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1631 | syms_ss = ss; | |
1632 | next_slot = true; | |
0058aef6 AH |
1633 | if (!dso->symsrc_filename) |
1634 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1635 | } |
1636 | ||
3aafe5ae CS |
1637 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1638 | runtime_ss = ss; | |
1639 | next_slot = true; | |
a44f605b | 1640 | } |
a2928c42 | 1641 | |
3aafe5ae CS |
1642 | if (next_slot) { |
1643 | ss_pos++; | |
33ff581e | 1644 | |
3aafe5ae CS |
1645 | if (syms_ss && runtime_ss) |
1646 | break; | |
98e9f03b NK |
1647 | } else { |
1648 | symsrc__destroy(ss); | |
6da80ce8 | 1649 | } |
3aafe5ae | 1650 | |
a25e46c4 | 1651 | } |
6da80ce8 | 1652 | |
3aafe5ae CS |
1653 | if (!runtime_ss && !syms_ss) |
1654 | goto out_free; | |
1655 | ||
1656 | if (runtime_ss && !syms_ss) { | |
1657 | syms_ss = runtime_ss; | |
1658 | } | |
1659 | ||
1660 | /* We'll have to hope for the best */ | |
1661 | if (!runtime_ss && syms_ss) | |
1662 | runtime_ss = syms_ss; | |
1663 | ||
1029f9fe | 1664 | if (syms_ss) |
be39db9f | 1665 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod); |
1029f9fe | 1666 | else |
3aafe5ae CS |
1667 | ret = -1; |
1668 | ||
f47b58b7 | 1669 | if (ret > 0) { |
3aafe5ae CS |
1670 | int nr_plt; |
1671 | ||
be39db9f | 1672 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map); |
3aafe5ae CS |
1673 | if (nr_plt > 0) |
1674 | ret += nr_plt; | |
60e4b10c ACM |
1675 | } |
1676 | ||
3aafe5ae CS |
1677 | for (; ss_pos > 0; ss_pos--) |
1678 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1679 | out_free: | |
a2928c42 | 1680 | free(name); |
aeafcbaf | 1681 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1682 | ret = 0; |
1683 | out: | |
1684 | dso__set_loaded(dso, map->type); | |
1685 | pthread_mutex_unlock(&dso->lock); | |
843ff37b | 1686 | nsinfo__mountns_exit(&nsc); |
4a936edc | 1687 | |
a2928c42 ACM |
1688 | return ret; |
1689 | } | |
1690 | ||
83cf774b | 1691 | struct map *__map_groups__find_by_name(struct map_groups *mg, enum map_type type, const char *name) |
439d473b | 1692 | { |
1eee78ae | 1693 | struct maps *maps = &mg->maps[type]; |
4bb7123d | 1694 | struct map *map; |
439d473b | 1695 | |
0a7c74ea | 1696 | down_read(&maps->lock); |
6a2ffcdd | 1697 | |
4bb7123d | 1698 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1699 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1700 | goto out_unlock; |
439d473b ACM |
1701 | } |
1702 | ||
6a2ffcdd ACM |
1703 | map = NULL; |
1704 | ||
1705 | out_unlock: | |
0a7c74ea | 1706 | up_read(&maps->lock); |
6a2ffcdd | 1707 | return map; |
439d473b ACM |
1708 | } |
1709 | ||
aeafcbaf | 1710 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
be39db9f | 1711 | const char *vmlinux, bool vmlinux_allocated) |
a2928c42 | 1712 | { |
b68e2f91 CS |
1713 | int err = -1; |
1714 | struct symsrc ss; | |
ec5761ea | 1715 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1716 | enum dso_binary_type symtab_type; |
a2928c42 | 1717 | |
5698d2c9 NK |
1718 | if (vmlinux[0] == '/') |
1719 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1720 | else | |
972f393b | 1721 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1722 | |
21ea4539 | 1723 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1724 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1725 | else |
005f9294 | 1726 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1727 | |
005f9294 | 1728 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1729 | return -1; |
1730 | ||
be39db9f | 1731 | err = dso__load_sym(dso, map, &ss, &ss, 0); |
b68e2f91 | 1732 | symsrc__destroy(&ss); |
a2928c42 | 1733 | |
515850e4 | 1734 | if (err > 0) { |
39b12f78 | 1735 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1736 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1737 | else |
5f70619d | 1738 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1739 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1740 | dso__set_loaded(dso, map->type); |
ec5761ea | 1741 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1742 | } |
3846df2e | 1743 | |
a2928c42 ACM |
1744 | return err; |
1745 | } | |
1746 | ||
be39db9f | 1747 | int dso__load_vmlinux_path(struct dso *dso, struct map *map) |
a19afe46 ACM |
1748 | { |
1749 | int i, err = 0; | |
00dc8657 | 1750 | char *filename = NULL; |
a19afe46 | 1751 | |
dc38218e ACM |
1752 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1753 | vmlinux_path__nr_entries + 1); | |
1754 | ||
1755 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
be39db9f | 1756 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false); |
dc38218e ACM |
1757 | if (err > 0) |
1758 | goto out; | |
1759 | } | |
1760 | ||
00dc8657 | 1761 | if (!symbol_conf.ignore_vmlinux_buildid) |
d2396999 | 1762 | filename = dso__build_id_filename(dso, NULL, 0, false); |
5ad90e4e | 1763 | if (filename != NULL) { |
be39db9f | 1764 | err = dso__load_vmlinux(dso, map, filename, true); |
5230fb7d | 1765 | if (err > 0) |
5ad90e4e | 1766 | goto out; |
5ad90e4e ACM |
1767 | free(filename); |
1768 | } | |
5ad90e4e | 1769 | out: |
a19afe46 ACM |
1770 | return err; |
1771 | } | |
1772 | ||
c48903b8 MH |
1773 | static bool visible_dir_filter(const char *name, struct dirent *d) |
1774 | { | |
1775 | if (d->d_type != DT_DIR) | |
1776 | return false; | |
1777 | return lsdir_no_dot_filter(name, d); | |
1778 | } | |
1779 | ||
0544d422 AH |
1780 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1781 | { | |
1782 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 1783 | int ret = -1; |
c48903b8 MH |
1784 | struct strlist *dirs; |
1785 | struct str_node *nd; | |
0544d422 | 1786 | |
c48903b8 MH |
1787 | dirs = lsdir(dir, visible_dir_filter); |
1788 | if (!dirs) | |
0544d422 AH |
1789 | return -1; |
1790 | ||
602a1f4d | 1791 | strlist__for_each_entry(nd, dirs) { |
0544d422 | 1792 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 1793 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 1794 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1795 | strlcpy(dir, kallsyms_filename, dir_sz); |
1796 | ret = 0; | |
1797 | break; | |
1798 | } | |
1799 | } | |
1800 | ||
c48903b8 | 1801 | strlist__delete(dirs); |
0544d422 AH |
1802 | |
1803 | return ret; | |
1804 | } | |
1805 | ||
11870d71 MH |
1806 | /* |
1807 | * Use open(O_RDONLY) to check readability directly instead of access(R_OK) | |
1808 | * since access(R_OK) only checks with real UID/GID but open() use effective | |
1809 | * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO). | |
1810 | */ | |
1811 | static bool filename__readable(const char *file) | |
1812 | { | |
1813 | int fd = open(file, O_RDONLY); | |
1814 | if (fd < 0) | |
1815 | return false; | |
1816 | close(fd); | |
1817 | return true; | |
1818 | } | |
1819 | ||
0544d422 AH |
1820 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) |
1821 | { | |
1822 | u8 host_build_id[BUILD_ID_SIZE]; | |
b5d8bbe8 | 1823 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
1824 | bool is_host = false; |
1825 | char path[PATH_MAX]; | |
1826 | ||
1827 | if (!dso->has_build_id) { | |
1828 | /* | |
1829 | * Last resort, if we don't have a build-id and couldn't find | |
1830 | * any vmlinux file, try the running kernel kallsyms table. | |
1831 | */ | |
1832 | goto proc_kallsyms; | |
1833 | } | |
1834 | ||
1835 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1836 | sizeof(host_build_id)) == 0) | |
1837 | is_host = dso__build_id_equal(dso, host_build_id); | |
1838 | ||
4e4b6c06 | 1839 | /* Try a fast path for /proc/kallsyms if possible */ |
0544d422 | 1840 | if (is_host) { |
0544d422 | 1841 | /* |
11870d71 MH |
1842 | * Do not check the build-id cache, unless we know we cannot use |
1843 | * /proc/kcore or module maps don't match to /proc/kallsyms. | |
1844 | * To check readability of /proc/kcore, do not use access(R_OK) | |
1845 | * since /proc/kcore requires CAP_SYS_RAWIO to read and access | |
1846 | * can't check it. | |
0544d422 | 1847 | */ |
11870d71 MH |
1848 | if (filename__readable("/proc/kcore") && |
1849 | !validate_kcore_addresses("/proc/kallsyms", map)) | |
1850 | goto proc_kallsyms; | |
0544d422 AH |
1851 | } |
1852 | ||
4e4b6c06 MH |
1853 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
1854 | ||
449867e3 | 1855 | /* Find kallsyms in build-id cache with kcore */ |
4e4b6c06 MH |
1856 | scnprintf(path, sizeof(path), "%s/%s/%s", |
1857 | buildid_dir, DSO__NAME_KCORE, sbuild_id); | |
1858 | ||
449867e3 AH |
1859 | if (!find_matching_kcore(map, path, sizeof(path))) |
1860 | return strdup(path); | |
1861 | ||
4e4b6c06 MH |
1862 | /* Use current /proc/kallsyms if possible */ |
1863 | if (is_host) { | |
1864 | proc_kallsyms: | |
1865 | return strdup("/proc/kallsyms"); | |
1866 | } | |
1867 | ||
1868 | /* Finally, find a cache of kallsyms */ | |
01412261 | 1869 | if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) { |
0544d422 AH |
1870 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", |
1871 | sbuild_id); | |
1872 | return NULL; | |
1873 | } | |
1874 | ||
1875 | return strdup(path); | |
0544d422 AH |
1876 | } |
1877 | ||
be39db9f | 1878 | static int dso__load_kernel_sym(struct dso *dso, struct map *map) |
a827c875 | 1879 | { |
cc612d81 | 1880 | int err; |
9e201442 ACM |
1881 | const char *kallsyms_filename = NULL; |
1882 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1883 | /* |
b226a5a7 DA |
1884 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1885 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1886 | * |
1887 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1888 | * build-id, or if the user specifies the wrong path to the right | |
1889 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1890 | * x86_86 one, on the machine where analysis is being performed, say), | |
1891 | * or worse, /proc/kallsyms. | |
1892 | * | |
1893 | * If the specified file _has_ a build-id and there is a build-id | |
1894 | * section in the perf.data file, we will still do the expected | |
1895 | * validation in dso__load_vmlinux and will bail out if they don't | |
1896 | * match. | |
1897 | */ | |
b226a5a7 DA |
1898 | if (symbol_conf.kallsyms_name != NULL) { |
1899 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1900 | goto do_kallsyms; | |
1901 | } | |
1902 | ||
fc2be696 | 1903 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
be39db9f | 1904 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false); |
dc8d6ab2 | 1905 | } |
cc612d81 | 1906 | |
fc2be696 | 1907 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
be39db9f | 1908 | err = dso__load_vmlinux_path(dso, map); |
a19afe46 | 1909 | if (err > 0) |
39b12f78 | 1910 | return err; |
cc612d81 ACM |
1911 | } |
1912 | ||
ec5761ea DA |
1913 | /* do not try local files if a symfs was given */ |
1914 | if (symbol_conf.symfs[0] != 0) | |
1915 | return -1; | |
1916 | ||
0544d422 AH |
1917 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1918 | if (!kallsyms_allocated_filename) | |
1919 | return -1; | |
19fc2ded | 1920 | |
0544d422 | 1921 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1922 | |
cc612d81 | 1923 | do_kallsyms: |
be39db9f | 1924 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
3846df2e ACM |
1925 | if (err > 0) |
1926 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1927 | free(kallsyms_allocated_filename); |
439d473b | 1928 | |
8e0cf965 | 1929 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1930 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 1931 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
1932 | map__fixup_start(map); |
1933 | map__fixup_end(map); | |
439d473b | 1934 | } |
94cb9e38 | 1935 | |
a827c875 ACM |
1936 | return err; |
1937 | } | |
1938 | ||
be39db9f | 1939 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map) |
a1645ce1 ZY |
1940 | { |
1941 | int err; | |
1942 | const char *kallsyms_filename = NULL; | |
23346f21 | 1943 | struct machine *machine; |
a1645ce1 ZY |
1944 | char path[PATH_MAX]; |
1945 | ||
1946 | if (!map->groups) { | |
1947 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1948 | return -1; | |
1949 | } | |
23346f21 | 1950 | machine = map->groups->machine; |
a1645ce1 | 1951 | |
23346f21 | 1952 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1953 | /* |
1954 | * if the user specified a vmlinux filename, use it and only | |
1955 | * it, reporting errors to the user if it cannot be used. | |
1956 | * Or use file guest_kallsyms inputted by user on commandline | |
1957 | */ | |
1958 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1959 | err = dso__load_vmlinux(dso, map, |
5230fb7d | 1960 | symbol_conf.default_guest_vmlinux_name, |
be39db9f | 1961 | false); |
39b12f78 | 1962 | return err; |
a1645ce1 ZY |
1963 | } |
1964 | ||
1965 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1966 | if (!kallsyms_filename) | |
1967 | return -1; | |
1968 | } else { | |
23346f21 | 1969 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1970 | kallsyms_filename = path; |
1971 | } | |
1972 | ||
be39db9f | 1973 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
8e0cf965 | 1974 | if (err > 0) |
39b12f78 | 1975 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1976 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1977 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
8c7f1bb3 | 1978 | dso__set_long_name(dso, machine->mmap_name, false); |
a1645ce1 ZY |
1979 | map__fixup_start(map); |
1980 | map__fixup_end(map); | |
1981 | } | |
1982 | ||
1983 | return err; | |
1984 | } | |
cd84c2ac | 1985 | |
cc612d81 ACM |
1986 | static void vmlinux_path__exit(void) |
1987 | { | |
04662523 ACM |
1988 | while (--vmlinux_path__nr_entries >= 0) |
1989 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1990 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1991 | |
04662523 | 1992 | zfree(&vmlinux_path); |
cc612d81 ACM |
1993 | } |
1994 | ||
aac48647 ET |
1995 | static const char * const vmlinux_paths[] = { |
1996 | "vmlinux", | |
1997 | "/boot/vmlinux" | |
1998 | }; | |
1999 | ||
2000 | static const char * const vmlinux_paths_upd[] = { | |
2001 | "/boot/vmlinux-%s", | |
2002 | "/usr/lib/debug/boot/vmlinux-%s", | |
2003 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
2004 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
2005 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
2006 | }; |
2007 | ||
2008 | static int vmlinux_path__add(const char *new_entry) | |
2009 | { | |
2010 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
2011 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2012 | return -1; | |
2013 | ++vmlinux_path__nr_entries; | |
2014 | ||
2015 | return 0; | |
2016 | } | |
2017 | ||
ce80d3be | 2018 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
2019 | { |
2020 | struct utsname uts; | |
2021 | char bf[PATH_MAX]; | |
0a7e6d1b | 2022 | char *kernel_version; |
aac48647 | 2023 | unsigned int i; |
cc612d81 | 2024 | |
aac48647 ET |
2025 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
2026 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
2027 | if (vmlinux_path == NULL) |
2028 | return -1; | |
2029 | ||
aac48647 ET |
2030 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
2031 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
2032 | goto out_fail; | |
ec5761ea | 2033 | |
0a7e6d1b | 2034 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
2035 | if (symbol_conf.symfs[0] != 0) |
2036 | return 0; | |
2037 | ||
0a7e6d1b NK |
2038 | if (env) { |
2039 | kernel_version = env->os_release; | |
2040 | } else { | |
2041 | if (uname(&uts) < 0) | |
2042 | goto out_fail; | |
2043 | ||
2044 | kernel_version = uts.release; | |
2045 | } | |
ec5761ea | 2046 | |
aac48647 ET |
2047 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
2048 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
2049 | if (vmlinux_path__add(bf) < 0) | |
2050 | goto out_fail; | |
2051 | } | |
cc612d81 ACM |
2052 | |
2053 | return 0; | |
2054 | ||
2055 | out_fail: | |
2056 | vmlinux_path__exit(); | |
2057 | return -1; | |
2058 | } | |
2059 | ||
3bfe5f81 | 2060 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
2061 | const char *list_name) |
2062 | { | |
2063 | if (list_str == NULL) | |
2064 | return 0; | |
2065 | ||
4a77e218 | 2066 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
2067 | if (!*list) { |
2068 | pr_err("problems parsing %s list\n", list_name); | |
2069 | return -1; | |
2070 | } | |
0bc2f2f7 ACM |
2071 | |
2072 | symbol_conf.has_filter = true; | |
655000e7 ACM |
2073 | return 0; |
2074 | } | |
2075 | ||
e03eaa40 DA |
2076 | int setup_intlist(struct intlist **list, const char *list_str, |
2077 | const char *list_name) | |
2078 | { | |
2079 | if (list_str == NULL) | |
2080 | return 0; | |
2081 | ||
2082 | *list = intlist__new(list_str); | |
2083 | if (!*list) { | |
2084 | pr_err("problems parsing %s list\n", list_name); | |
2085 | return -1; | |
2086 | } | |
2087 | return 0; | |
2088 | } | |
2089 | ||
ec80fde7 ACM |
2090 | static bool symbol__read_kptr_restrict(void) |
2091 | { | |
2092 | bool value = false; | |
38272dc4 | 2093 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); |
ec80fde7 | 2094 | |
38272dc4 WN |
2095 | if (fp != NULL) { |
2096 | char line[8]; | |
ec80fde7 | 2097 | |
38272dc4 | 2098 | if (fgets(line, sizeof(line), fp) != NULL) |
3dbe46c5 | 2099 | value = ((geteuid() != 0) || (getuid() != 0)) ? |
38272dc4 WN |
2100 | (atoi(line) != 0) : |
2101 | (atoi(line) == 2); | |
ec80fde7 | 2102 | |
38272dc4 | 2103 | fclose(fp); |
ec80fde7 ACM |
2104 | } |
2105 | ||
2106 | return value; | |
2107 | } | |
2108 | ||
b01141f4 ACM |
2109 | int symbol__annotation_init(void) |
2110 | { | |
7b366142 ACM |
2111 | if (symbol_conf.init_annotation) |
2112 | return 0; | |
2113 | ||
b01141f4 ACM |
2114 | if (symbol_conf.initialized) { |
2115 | pr_err("Annotation needs to be init before symbol__init()\n"); | |
2116 | return -1; | |
2117 | } | |
2118 | ||
b01141f4 ACM |
2119 | symbol_conf.priv_size += sizeof(struct annotation); |
2120 | symbol_conf.init_annotation = true; | |
2121 | return 0; | |
2122 | } | |
2123 | ||
ce80d3be | 2124 | int symbol__init(struct perf_env *env) |
2446042c | 2125 | { |
ec5761ea DA |
2126 | const char *symfs; |
2127 | ||
85e00b55 JZ |
2128 | if (symbol_conf.initialized) |
2129 | return 0; | |
2130 | ||
9ac3e487 | 2131 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 2132 | |
166ccc9c NK |
2133 | symbol__elf_init(); |
2134 | ||
75be6cf4 ACM |
2135 | if (symbol_conf.sort_by_name) |
2136 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2137 | sizeof(struct symbol)); | |
b32d133a | 2138 | |
0a7e6d1b | 2139 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
2140 | return -1; |
2141 | ||
c410a338 ACM |
2142 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2143 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2144 | return -1; | |
2145 | } | |
2146 | ||
655000e7 ACM |
2147 | if (setup_list(&symbol_conf.dso_list, |
2148 | symbol_conf.dso_list_str, "dso") < 0) | |
2149 | return -1; | |
2150 | ||
2151 | if (setup_list(&symbol_conf.comm_list, | |
2152 | symbol_conf.comm_list_str, "comm") < 0) | |
2153 | goto out_free_dso_list; | |
2154 | ||
e03eaa40 DA |
2155 | if (setup_intlist(&symbol_conf.pid_list, |
2156 | symbol_conf.pid_list_str, "pid") < 0) | |
2157 | goto out_free_comm_list; | |
2158 | ||
2159 | if (setup_intlist(&symbol_conf.tid_list, | |
2160 | symbol_conf.tid_list_str, "tid") < 0) | |
2161 | goto out_free_pid_list; | |
2162 | ||
655000e7 ACM |
2163 | if (setup_list(&symbol_conf.sym_list, |
2164 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2165 | goto out_free_tid_list; |
655000e7 | 2166 | |
64eff7d9 DA |
2167 | if (setup_list(&symbol_conf.bt_stop_list, |
2168 | symbol_conf.bt_stop_list_str, "symbol") < 0) | |
2169 | goto out_free_sym_list; | |
2170 | ||
ec5761ea DA |
2171 | /* |
2172 | * A path to symbols of "/" is identical to "" | |
2173 | * reset here for simplicity. | |
2174 | */ | |
2175 | symfs = realpath(symbol_conf.symfs, NULL); | |
2176 | if (symfs == NULL) | |
2177 | symfs = symbol_conf.symfs; | |
2178 | if (strcmp(symfs, "/") == 0) | |
2179 | symbol_conf.symfs = ""; | |
2180 | if (symfs != symbol_conf.symfs) | |
2181 | free((void *)symfs); | |
2182 | ||
ec80fde7 ACM |
2183 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2184 | ||
85e00b55 | 2185 | symbol_conf.initialized = true; |
4aa65636 | 2186 | return 0; |
655000e7 | 2187 | |
64eff7d9 DA |
2188 | out_free_sym_list: |
2189 | strlist__delete(symbol_conf.sym_list); | |
e03eaa40 DA |
2190 | out_free_tid_list: |
2191 | intlist__delete(symbol_conf.tid_list); | |
2192 | out_free_pid_list: | |
2193 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2194 | out_free_comm_list: |
2195 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2196 | out_free_dso_list: |
2197 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2198 | return -1; |
4aa65636 ACM |
2199 | } |
2200 | ||
d65a458b ACM |
2201 | void symbol__exit(void) |
2202 | { | |
85e00b55 JZ |
2203 | if (!symbol_conf.initialized) |
2204 | return; | |
64eff7d9 | 2205 | strlist__delete(symbol_conf.bt_stop_list); |
d65a458b ACM |
2206 | strlist__delete(symbol_conf.sym_list); |
2207 | strlist__delete(symbol_conf.dso_list); | |
2208 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2209 | intlist__delete(symbol_conf.tid_list); |
2210 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2211 | vmlinux_path__exit(); |
2212 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
64eff7d9 | 2213 | symbol_conf.bt_stop_list = NULL; |
85e00b55 | 2214 | symbol_conf.initialized = false; |
d65a458b | 2215 | } |
a7066709 HK |
2216 | |
2217 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2218 | const char *dir, int unset __maybe_unused) | |
2219 | { | |
2220 | char *bf = NULL; | |
2221 | int ret; | |
2222 | ||
2223 | symbol_conf.symfs = strdup(dir); | |
2224 | if (symbol_conf.symfs == NULL) | |
2225 | return -ENOMEM; | |
2226 | ||
2227 | /* skip the locally configured cache if a symfs is given, and | |
2228 | * config buildid dir to symfs/.debug | |
2229 | */ | |
2230 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2231 | if (ret < 0) | |
2232 | return -ENOMEM; | |
2233 | ||
2234 | set_buildid_dir(bf); | |
2235 | ||
2236 | free(bf); | |
2237 | return 0; | |
2238 | } | |
9f87498f JO |
2239 | |
2240 | struct mem_info *mem_info__get(struct mem_info *mi) | |
2241 | { | |
2242 | if (mi) | |
2243 | refcount_inc(&mi->refcnt); | |
2244 | return mi; | |
2245 | } | |
2246 | ||
2247 | void mem_info__put(struct mem_info *mi) | |
2248 | { | |
2249 | if (mi && refcount_dec_and_test(&mi->refcnt)) | |
2250 | free(mi); | |
2251 | } | |
2252 | ||
2253 | struct mem_info *mem_info__new(void) | |
2254 | { | |
2255 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
2256 | ||
2257 | if (mi) | |
2258 | refcount_set(&mi->refcnt, 1); | |
2259 | return mi; | |
2260 | } |