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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, | |
e511db5e | 43 | .demangle = true, |
763122ad | 44 | .demangle_kernel = false, |
e511db5e | 45 | .cumulate_callchain = true, |
c8302367 | 46 | .show_hist_headers = true, |
e511db5e | 47 | .symfs = "", |
1e9abf8b | 48 | .event_group = true, |
d8a88dd2 | 49 | .inline_name = true, |
b32d133a ACM |
50 | }; |
51 | ||
44f24cb3 JO |
52 | static enum dso_binary_type binary_type_symtab[] = { |
53 | DSO_BINARY_TYPE__KALLSYMS, | |
54 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
55 | DSO_BINARY_TYPE__JAVA_JIT, | |
56 | DSO_BINARY_TYPE__DEBUGLINK, | |
57 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
d2396999 | 58 | DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO, |
44f24cb3 JO |
59 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
60 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
61 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
62 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
63 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 64 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 65 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 66 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 67 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
68 | DSO_BINARY_TYPE__NOT_FOUND, |
69 | }; | |
70 | ||
028df767 | 71 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 72 | |
3183f8ca | 73 | static bool symbol_type__filter(char symbol_type) |
6893d4ee | 74 | { |
31877908 | 75 | symbol_type = toupper(symbol_type); |
2be732c0 | 76 | return symbol_type == 'T' || symbol_type == 'W' || symbol_type == 'D' || symbol_type == 'B'; |
6893d4ee ACM |
77 | } |
78 | ||
694bf407 AB |
79 | static int prefix_underscores_count(const char *str) |
80 | { | |
81 | const char *tail = str; | |
82 | ||
83 | while (*tail == '_') | |
84 | tail++; | |
85 | ||
86 | return tail - str; | |
87 | } | |
88 | ||
4b3a2716 MH |
89 | const char * __weak arch__normalize_symbol_name(const char *name) |
90 | { | |
91 | return name; | |
92 | } | |
93 | ||
d8040645 PC |
94 | int __weak arch__compare_symbol_names(const char *namea, const char *nameb) |
95 | { | |
96 | return strcmp(namea, nameb); | |
97 | } | |
98 | ||
99 | int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb, | |
100 | unsigned int n) | |
101 | { | |
102 | return strncmp(namea, nameb, n); | |
103 | } | |
104 | ||
fb6d5942 NR |
105 | int __weak arch__choose_best_symbol(struct symbol *syma, |
106 | struct symbol *symb __maybe_unused) | |
107 | { | |
108 | /* Avoid "SyS" kernel syscall aliases */ | |
109 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
110 | return SYMBOL_B; | |
111 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
112 | return SYMBOL_B; | |
113 | ||
114 | return SYMBOL_A; | |
115 | } | |
694bf407 AB |
116 | |
117 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
118 | { | |
119 | s64 a; | |
120 | s64 b; | |
3445432b | 121 | size_t na, nb; |
694bf407 AB |
122 | |
123 | /* Prefer a symbol with non zero length */ | |
124 | a = syma->end - syma->start; | |
125 | b = symb->end - symb->start; | |
126 | if ((b == 0) && (a > 0)) | |
127 | return SYMBOL_A; | |
128 | else if ((a == 0) && (b > 0)) | |
129 | return SYMBOL_B; | |
130 | ||
131 | /* Prefer a non weak symbol over a weak one */ | |
132 | a = syma->binding == STB_WEAK; | |
133 | b = symb->binding == STB_WEAK; | |
134 | if (b && !a) | |
135 | return SYMBOL_A; | |
136 | if (a && !b) | |
137 | return SYMBOL_B; | |
138 | ||
139 | /* Prefer a global symbol over a non global one */ | |
140 | a = syma->binding == STB_GLOBAL; | |
141 | b = symb->binding == STB_GLOBAL; | |
142 | if (a && !b) | |
143 | return SYMBOL_A; | |
144 | if (b && !a) | |
145 | return SYMBOL_B; | |
146 | ||
147 | /* Prefer a symbol with less underscores */ | |
148 | a = prefix_underscores_count(syma->name); | |
149 | b = prefix_underscores_count(symb->name); | |
150 | if (b > a) | |
151 | return SYMBOL_A; | |
152 | else if (a > b) | |
153 | return SYMBOL_B; | |
154 | ||
3445432b AH |
155 | /* Choose the symbol with the longest name */ |
156 | na = strlen(syma->name); | |
157 | nb = strlen(symb->name); | |
158 | if (na > nb) | |
694bf407 | 159 | return SYMBOL_A; |
3445432b | 160 | else if (na < nb) |
694bf407 | 161 | return SYMBOL_B; |
3445432b | 162 | |
fb6d5942 | 163 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
164 | } |
165 | ||
e5a1845f | 166 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
167 | { |
168 | struct rb_node *nd; | |
169 | struct symbol *curr, *next; | |
170 | ||
c97b40e4 ACM |
171 | if (symbol_conf.allow_aliases) |
172 | return; | |
173 | ||
694bf407 AB |
174 | nd = rb_first(symbols); |
175 | ||
176 | while (nd) { | |
177 | curr = rb_entry(nd, struct symbol, rb_node); | |
178 | again: | |
179 | nd = rb_next(&curr->rb_node); | |
180 | next = rb_entry(nd, struct symbol, rb_node); | |
181 | ||
182 | if (!nd) | |
183 | break; | |
184 | ||
185 | if (curr->start != next->start) | |
186 | continue; | |
187 | ||
188 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
189 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 190 | symbol__delete(next); |
694bf407 AB |
191 | goto again; |
192 | } else { | |
193 | nd = rb_next(&curr->rb_node); | |
194 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 195 | symbol__delete(curr); |
694bf407 AB |
196 | } |
197 | } | |
198 | } | |
199 | ||
e5a1845f | 200 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 201 | { |
aeafcbaf | 202 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 203 | struct symbol *curr, *prev; |
af427bf5 ACM |
204 | |
205 | if (prevnd == NULL) | |
206 | return; | |
207 | ||
2e538c4a ACM |
208 | curr = rb_entry(prevnd, struct symbol, rb_node); |
209 | ||
af427bf5 | 210 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
211 | prev = curr; |
212 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 213 | |
3b01a413 | 214 | if (prev->end == prev->start && prev->end != curr->start) |
2c241bd3 | 215 | prev->end = curr->start; |
af427bf5 | 216 | } |
2e538c4a ACM |
217 | |
218 | /* Last entry */ | |
219 | if (curr->end == curr->start) | |
e7ede72a | 220 | curr->end = roundup(curr->start, 4096) + 4096; |
af427bf5 ACM |
221 | } |
222 | ||
3183f8ca | 223 | void map_groups__fixup_end(struct map_groups *mg) |
af427bf5 | 224 | { |
3183f8ca | 225 | struct maps *maps = &mg->maps; |
4bb7123d | 226 | struct map *next, *curr; |
af427bf5 | 227 | |
0a7c74ea | 228 | down_write(&maps->lock); |
6a2ffcdd | 229 | |
4bb7123d ACM |
230 | curr = maps__first(maps); |
231 | if (curr == NULL) | |
6a2ffcdd | 232 | goto out_unlock; |
af427bf5 | 233 | |
4bb7123d | 234 | for (next = map__next(curr); next; next = map__next(curr)) { |
9ad4652b TR |
235 | if (!curr->end) |
236 | curr->end = next->start; | |
4bb7123d | 237 | curr = next; |
2e538c4a | 238 | } |
90c83218 ACM |
239 | |
240 | /* | |
241 | * We still haven't the actual symbols, so guess the | |
242 | * last map final address. | |
243 | */ | |
9ad4652b TR |
244 | if (!curr->end) |
245 | curr->end = ~0ULL; | |
6a2ffcdd ACM |
246 | |
247 | out_unlock: | |
0a7c74ea | 248 | up_write(&maps->lock); |
af427bf5 ACM |
249 | } |
250 | ||
af30bffa | 251 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name) |
a2928c42 | 252 | { |
0085c954 | 253 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
254 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
255 | sizeof(*sym) + namelen)); | |
256 | if (sym == NULL) | |
0b73da3f IM |
257 | return NULL; |
258 | ||
b01141f4 ACM |
259 | if (symbol_conf.priv_size) { |
260 | if (symbol_conf.init_annotation) { | |
261 | struct annotation *notes = (void *)sym; | |
262 | pthread_mutex_init(¬es->lock, NULL); | |
263 | } | |
aeafcbaf | 264 | sym = ((void *)sym) + symbol_conf.priv_size; |
b01141f4 | 265 | } |
e4204992 | 266 | |
aeafcbaf | 267 | sym->start = start; |
2c241bd3 | 268 | sym->end = len ? start + len : start; |
af30bffa | 269 | sym->type = type; |
aeafcbaf ACM |
270 | sym->binding = binding; |
271 | sym->namelen = namelen - 1; | |
e4204992 | 272 | |
aeafcbaf ACM |
273 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
274 | __func__, name, start, sym->end); | |
275 | memcpy(sym->name, name, namelen); | |
a2928c42 | 276 | |
aeafcbaf | 277 | return sym; |
a2928c42 ACM |
278 | } |
279 | ||
aeafcbaf | 280 | void symbol__delete(struct symbol *sym) |
a2928c42 | 281 | { |
aeafcbaf | 282 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
283 | } |
284 | ||
cdd059d7 | 285 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
286 | { |
287 | struct symbol *pos; | |
aeafcbaf | 288 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
289 | |
290 | while (next) { | |
291 | pos = rb_entry(next, struct symbol, rb_node); | |
292 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 293 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 294 | symbol__delete(pos); |
a2928c42 ACM |
295 | } |
296 | } | |
297 | ||
608c34de | 298 | void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel) |
a2928c42 | 299 | { |
aeafcbaf | 300 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 301 | struct rb_node *parent = NULL; |
9cffa8d5 | 302 | const u64 ip = sym->start; |
a2928c42 ACM |
303 | struct symbol *s; |
304 | ||
608c34de ACM |
305 | if (kernel) { |
306 | const char *name = sym->name; | |
307 | /* | |
308 | * ppc64 uses function descriptors and appends a '.' to the | |
309 | * start of every instruction address. Remove it. | |
310 | */ | |
311 | if (name[0] == '.') | |
312 | name++; | |
313 | sym->idle = symbol__is_idle(name); | |
314 | } | |
315 | ||
a2928c42 ACM |
316 | while (*p != NULL) { |
317 | parent = *p; | |
318 | s = rb_entry(parent, struct symbol, rb_node); | |
319 | if (ip < s->start) | |
320 | p = &(*p)->rb_left; | |
321 | else | |
322 | p = &(*p)->rb_right; | |
323 | } | |
324 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 325 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
326 | } |
327 | ||
608c34de ACM |
328 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
329 | { | |
330 | __symbols__insert(symbols, sym, false); | |
331 | } | |
332 | ||
aeafcbaf | 333 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
334 | { |
335 | struct rb_node *n; | |
336 | ||
aeafcbaf | 337 | if (symbols == NULL) |
a2928c42 ACM |
338 | return NULL; |
339 | ||
aeafcbaf | 340 | n = symbols->rb_node; |
a2928c42 ACM |
341 | |
342 | while (n) { | |
343 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
344 | ||
345 | if (ip < s->start) | |
346 | n = n->rb_left; | |
9c7b37cd | 347 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
348 | n = n->rb_right; |
349 | else | |
350 | return s; | |
351 | } | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
8e0cf965 AH |
356 | static struct symbol *symbols__first(struct rb_root *symbols) |
357 | { | |
358 | struct rb_node *n = rb_first(symbols); | |
359 | ||
360 | if (n) | |
361 | return rb_entry(n, struct symbol, rb_node); | |
362 | ||
363 | return NULL; | |
364 | } | |
365 | ||
cd67f99f AH |
366 | static struct symbol *symbols__last(struct rb_root *symbols) |
367 | { | |
368 | struct rb_node *n = rb_last(symbols); | |
369 | ||
370 | if (n) | |
371 | return rb_entry(n, struct symbol, rb_node); | |
372 | ||
373 | return NULL; | |
374 | } | |
375 | ||
9c00a81b AH |
376 | static struct symbol *symbols__next(struct symbol *sym) |
377 | { | |
378 | struct rb_node *n = rb_next(&sym->rb_node); | |
379 | ||
380 | if (n) | |
381 | return rb_entry(n, struct symbol, rb_node); | |
382 | ||
383 | return NULL; | |
384 | } | |
385 | ||
aeafcbaf | 386 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 387 | { |
aeafcbaf | 388 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 389 | struct rb_node *parent = NULL; |
02a9d037 RV |
390 | struct symbol_name_rb_node *symn, *s; |
391 | ||
392 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
393 | |
394 | while (*p != NULL) { | |
395 | parent = *p; | |
396 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
397 | if (strcmp(sym->name, s->sym.name) < 0) | |
398 | p = &(*p)->rb_left; | |
399 | else | |
400 | p = &(*p)->rb_right; | |
401 | } | |
402 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 403 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
404 | } |
405 | ||
aeafcbaf ACM |
406 | static void symbols__sort_by_name(struct rb_root *symbols, |
407 | struct rb_root *source) | |
79406cd7 ACM |
408 | { |
409 | struct rb_node *nd; | |
410 | ||
411 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
412 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 413 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
414 | } |
415 | } | |
416 | ||
d8040645 PC |
417 | int symbol__match_symbol_name(const char *name, const char *str, |
418 | enum symbol_tag_include includes) | |
419 | { | |
420 | const char *versioning; | |
421 | ||
422 | if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY && | |
423 | (versioning = strstr(name, "@@"))) { | |
424 | int len = strlen(str); | |
425 | ||
426 | if (len < versioning - name) | |
427 | len = versioning - name; | |
428 | ||
429 | return arch__compare_symbol_names_n(name, str, len); | |
430 | } else | |
431 | return arch__compare_symbol_names(name, str); | |
432 | } | |
433 | ||
aeafcbaf | 434 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
d8040645 PC |
435 | const char *name, |
436 | enum symbol_tag_include includes) | |
79406cd7 ACM |
437 | { |
438 | struct rb_node *n; | |
5bcaaca3 | 439 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 440 | |
aeafcbaf | 441 | if (symbols == NULL) |
79406cd7 ACM |
442 | return NULL; |
443 | ||
aeafcbaf | 444 | n = symbols->rb_node; |
79406cd7 ACM |
445 | |
446 | while (n) { | |
79406cd7 ACM |
447 | int cmp; |
448 | ||
449 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
d8040645 | 450 | cmp = symbol__match_symbol_name(s->sym.name, name, includes); |
79406cd7 | 451 | |
d8040645 | 452 | if (cmp > 0) |
79406cd7 | 453 | n = n->rb_left; |
d8040645 | 454 | else if (cmp < 0) |
79406cd7 ACM |
455 | n = n->rb_right; |
456 | else | |
de480999 | 457 | break; |
79406cd7 ACM |
458 | } |
459 | ||
de480999 NK |
460 | if (n == NULL) |
461 | return NULL; | |
462 | ||
d8040645 PC |
463 | if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY) |
464 | /* return first symbol that has same name (if any) */ | |
465 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
466 | struct symbol_name_rb_node *tmp; | |
de480999 | 467 | |
d8040645 PC |
468 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); |
469 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) | |
470 | break; | |
de480999 | 471 | |
d8040645 PC |
472 | s = tmp; |
473 | } | |
de480999 NK |
474 | |
475 | return &s->sym; | |
79406cd7 ACM |
476 | } |
477 | ||
c0b4dffb ACM |
478 | void dso__reset_find_symbol_cache(struct dso *dso) |
479 | { | |
3183f8ca ACM |
480 | dso->last_find_result.addr = 0; |
481 | dso->last_find_result.symbol = NULL; | |
c0b4dffb ACM |
482 | } |
483 | ||
3183f8ca | 484 | void dso__insert_symbol(struct dso *dso, struct symbol *sym) |
ae93a6c7 | 485 | { |
3183f8ca | 486 | __symbols__insert(&dso->symbols, sym, dso->kernel); |
ae93a6c7 CP |
487 | |
488 | /* update the symbol cache if necessary */ | |
3183f8ca ACM |
489 | if (dso->last_find_result.addr >= sym->start && |
490 | (dso->last_find_result.addr < sym->end || | |
ae93a6c7 | 491 | sym->start == sym->end)) { |
3183f8ca | 492 | dso->last_find_result.symbol = sym; |
ae93a6c7 CP |
493 | } |
494 | } | |
495 | ||
3183f8ca | 496 | struct symbol *dso__find_symbol(struct dso *dso, u64 addr) |
fcf1203a | 497 | { |
3183f8ca ACM |
498 | if (dso->last_find_result.addr != addr || dso->last_find_result.symbol == NULL) { |
499 | dso->last_find_result.addr = addr; | |
500 | dso->last_find_result.symbol = symbols__find(&dso->symbols, addr); | |
b685ac22 ACM |
501 | } |
502 | ||
3183f8ca | 503 | return dso->last_find_result.symbol; |
9c00a81b AH |
504 | } |
505 | ||
5cf88a63 ACM |
506 | struct symbol *dso__first_symbol(struct dso *dso) |
507 | { | |
3183f8ca | 508 | return symbols__first(&dso->symbols); |
cd67f99f AH |
509 | } |
510 | ||
5cf88a63 ACM |
511 | struct symbol *dso__last_symbol(struct dso *dso) |
512 | { | |
3183f8ca | 513 | return symbols__last(&dso->symbols); |
5cf88a63 ACM |
514 | } |
515 | ||
9c00a81b AH |
516 | struct symbol *dso__next_symbol(struct symbol *sym) |
517 | { | |
518 | return symbols__next(sym); | |
8e0cf965 AH |
519 | } |
520 | ||
18bd7264 ACM |
521 | struct symbol *symbol__next_by_name(struct symbol *sym) |
522 | { | |
523 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
524 | struct rb_node *n = rb_next(&s->rb_node); | |
525 | ||
526 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
527 | } | |
528 | ||
529 | /* | |
af07eeb0 | 530 | * Returns first symbol that matched with @name. |
18bd7264 | 531 | */ |
3183f8ca | 532 | struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name) |
79406cd7 | 533 | { |
3183f8ca | 534 | struct symbol *s = symbols__find_by_name(&dso->symbol_names, name, |
d8040645 PC |
535 | SYMBOL_TAG_INCLUDE__NONE); |
536 | if (!s) | |
3183f8ca | 537 | s = symbols__find_by_name(&dso->symbol_names, name, |
d8040645 PC |
538 | SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); |
539 | return s; | |
79406cd7 ACM |
540 | } |
541 | ||
3183f8ca | 542 | void dso__sort_by_name(struct dso *dso) |
79406cd7 | 543 | { |
3183f8ca ACM |
544 | dso__set_sorted_by_name(dso); |
545 | return symbols__sort_by_name(&dso->symbol_names, &dso->symbols); | |
79406cd7 ACM |
546 | } |
547 | ||
316d70d6 AH |
548 | int modules__parse(const char *filename, void *arg, |
549 | int (*process_module)(void *arg, const char *name, | |
9ad4652b | 550 | u64 start, u64 size)) |
316d70d6 AH |
551 | { |
552 | char *line = NULL; | |
553 | size_t n; | |
554 | FILE *file; | |
555 | int err = 0; | |
556 | ||
557 | file = fopen(filename, "r"); | |
558 | if (file == NULL) | |
559 | return -1; | |
560 | ||
561 | while (1) { | |
562 | char name[PATH_MAX]; | |
9ad4652b TR |
563 | u64 start, size; |
564 | char *sep, *endptr; | |
316d70d6 AH |
565 | ssize_t line_len; |
566 | ||
567 | line_len = getline(&line, &n, file); | |
568 | if (line_len < 0) { | |
569 | if (feof(file)) | |
570 | break; | |
571 | err = -1; | |
572 | goto out; | |
573 | } | |
574 | ||
575 | if (!line) { | |
576 | err = -1; | |
577 | goto out; | |
578 | } | |
579 | ||
580 | line[--line_len] = '\0'; /* \n */ | |
581 | ||
582 | sep = strrchr(line, 'x'); | |
583 | if (sep == NULL) | |
584 | continue; | |
585 | ||
586 | hex2u64(sep + 1, &start); | |
587 | ||
588 | sep = strchr(line, ' '); | |
589 | if (sep == NULL) | |
590 | continue; | |
591 | ||
592 | *sep = '\0'; | |
593 | ||
594 | scnprintf(name, sizeof(name), "[%s]", line); | |
595 | ||
9ad4652b TR |
596 | size = strtoul(sep + 1, &endptr, 0); |
597 | if (*endptr != ' ' && *endptr != '\t') | |
598 | continue; | |
599 | ||
600 | err = process_module(arg, name, start, size); | |
316d70d6 AH |
601 | if (err) |
602 | break; | |
603 | } | |
604 | out: | |
605 | free(line); | |
606 | fclose(file); | |
607 | return err; | |
608 | } | |
609 | ||
e7110b9f ACM |
610 | /* |
611 | * These are symbols in the kernel image, so make sure that | |
612 | * sym is from a kernel DSO. | |
613 | */ | |
608c34de | 614 | static bool symbol__is_idle(const char *name) |
82d1deb0 DA |
615 | { |
616 | const char * const idle_symbols[] = { | |
617 | "cpu_idle", | |
e0336ed6 | 618 | "cpu_startup_entry", |
82d1deb0 DA |
619 | "intel_idle", |
620 | "default_idle", | |
621 | "native_safe_halt", | |
622 | "enter_idle", | |
623 | "exit_idle", | |
624 | "mwait_idle", | |
625 | "mwait_idle_with_hints", | |
626 | "poll_idle", | |
627 | "ppc64_runlatch_off", | |
628 | "pseries_dedicated_idle_sleep", | |
629 | NULL | |
630 | }; | |
82d1deb0 DA |
631 | int i; |
632 | ||
82d1deb0 | 633 | for (i = 0; idle_symbols[i]; i++) { |
608c34de | 634 | if (!strcmp(idle_symbols[i], name)) |
82d1deb0 DA |
635 | return true; |
636 | } | |
637 | ||
638 | return false; | |
639 | } | |
640 | ||
682b335a | 641 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 642 | char type, u64 start) |
682b335a ACM |
643 | { |
644 | struct symbol *sym; | |
333cc76c ACM |
645 | struct dso *dso = arg; |
646 | struct rb_root *root = &dso->symbols; | |
682b335a | 647 | |
3183f8ca | 648 | if (!symbol_type__filter(type)) |
682b335a ACM |
649 | return 0; |
650 | ||
82151520 CS |
651 | /* |
652 | * module symbols are not sorted so we add all | |
653 | * symbols, setting length to 0, and rely on | |
654 | * symbols__fixup_end() to fix it up. | |
655 | */ | |
af30bffa | 656 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), kallsyms2elf_type(type), name); |
682b335a ACM |
657 | if (sym == NULL) |
658 | return -ENOMEM; | |
659 | /* | |
660 | * We will pass the symbols to the filter later, in | |
661 | * map__split_kallsyms, when we have split the maps per module | |
662 | */ | |
608c34de | 663 | __symbols__insert(root, sym, !strchr(name, '[')); |
a1645ce1 | 664 | |
682b335a ACM |
665 | return 0; |
666 | } | |
667 | ||
668 | /* | |
669 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
670 | * so that we can in the next step set the symbol ->end address and then | |
671 | * call kernel_maps__split_kallsyms. | |
672 | */ | |
333cc76c | 673 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename) |
682b335a | 674 | { |
333cc76c | 675 | return kallsyms__parse(filename, dso, map__process_kallsym_symbol); |
682b335a ACM |
676 | } |
677 | ||
15e0e2d4 | 678 | static int map_groups__split_kallsyms_for_kcore(struct map_groups *kmaps, struct dso *dso) |
8e0cf965 | 679 | { |
8e0cf965 AH |
680 | struct map *curr_map; |
681 | struct symbol *pos; | |
866548dd | 682 | int count = 0; |
3183f8ca ACM |
683 | struct rb_root old_root = dso->symbols; |
684 | struct rb_root *root = &dso->symbols; | |
8e0cf965 AH |
685 | struct rb_node *next = rb_first(root); |
686 | ||
ba92732e WN |
687 | if (!kmaps) |
688 | return -1; | |
689 | ||
866548dd AH |
690 | *root = RB_ROOT; |
691 | ||
8e0cf965 AH |
692 | while (next) { |
693 | char *module; | |
694 | ||
695 | pos = rb_entry(next, struct symbol, rb_node); | |
696 | next = rb_next(&pos->rb_node); | |
697 | ||
866548dd AH |
698 | rb_erase_init(&pos->rb_node, &old_root); |
699 | ||
8e0cf965 AH |
700 | module = strchr(pos->name, '\t'); |
701 | if (module) | |
702 | *module = '\0'; | |
703 | ||
3183f8ca | 704 | curr_map = map_groups__find(kmaps, pos->start); |
8e0cf965 | 705 | |
be39db9f | 706 | if (!curr_map) { |
8e0cf965 | 707 | symbol__delete(pos); |
866548dd | 708 | continue; |
8e0cf965 | 709 | } |
866548dd AH |
710 | |
711 | pos->start -= curr_map->start - curr_map->pgoff; | |
712 | if (pos->end) | |
713 | pos->end -= curr_map->start - curr_map->pgoff; | |
3183f8ca | 714 | symbols__insert(&curr_map->dso->symbols, pos); |
866548dd | 715 | ++count; |
8e0cf965 AH |
716 | } |
717 | ||
718 | /* Symbols have been adjusted */ | |
719 | dso->adjust_symbols = 1; | |
720 | ||
866548dd | 721 | return count; |
8e0cf965 AH |
722 | } |
723 | ||
2e538c4a ACM |
724 | /* |
725 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
726 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
727 | * the original ELF section names vmlinux have. | |
728 | */ | |
15e0e2d4 ACM |
729 | static int map_groups__split_kallsyms(struct map_groups *kmaps, struct dso *dso, u64 delta, |
730 | struct map *initial_map) | |
2e538c4a | 731 | { |
ba92732e | 732 | struct machine *machine; |
15e0e2d4 | 733 | struct map *curr_map = initial_map; |
2e538c4a | 734 | struct symbol *pos; |
48000a1a | 735 | int count = 0, moved = 0; |
3183f8ca | 736 | struct rb_root *root = &dso->symbols; |
4e06255f | 737 | struct rb_node *next = rb_first(root); |
2e538c4a | 738 | int kernel_range = 0; |
4d004365 | 739 | bool x86_64; |
2e538c4a | 740 | |
ba92732e WN |
741 | if (!kmaps) |
742 | return -1; | |
743 | ||
744 | machine = kmaps->machine; | |
745 | ||
4d004365 AH |
746 | x86_64 = machine__is(machine, "x86_64"); |
747 | ||
2e538c4a ACM |
748 | while (next) { |
749 | char *module; | |
750 | ||
751 | pos = rb_entry(next, struct symbol, rb_node); | |
752 | next = rb_next(&pos->rb_node); | |
753 | ||
754 | module = strchr(pos->name, '\t'); | |
755 | if (module) { | |
75be6cf4 | 756 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
757 | goto discard_symbol; |
758 | ||
2e538c4a ACM |
759 | *module++ = '\0'; |
760 | ||
b7cece76 | 761 | if (strcmp(curr_map->dso->short_name, module)) { |
15e0e2d4 | 762 | if (curr_map != initial_map && |
aeafcbaf | 763 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 764 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
765 | /* |
766 | * We assume all symbols of a module are | |
767 | * continuous in * kallsyms, so curr_map | |
768 | * points to a module and all its | |
769 | * symbols are in its kmap. Mark it as | |
770 | * loaded. | |
771 | */ | |
3183f8ca | 772 | dso__set_loaded(curr_map->dso); |
a1645ce1 ZY |
773 | } |
774 | ||
3183f8ca | 775 | curr_map = map_groups__find_by_name(kmaps, module); |
4e06255f | 776 | if (curr_map == NULL) { |
2f51903b | 777 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 778 | "inconsistency while looking " |
a1645ce1 | 779 | "for \"%s\" module!\n", |
23346f21 | 780 | machine->root_dir, module); |
15e0e2d4 | 781 | curr_map = initial_map; |
a1645ce1 | 782 | goto discard_symbol; |
af427bf5 | 783 | } |
b7cece76 | 784 | |
a1645ce1 | 785 | if (curr_map->dso->loaded && |
23346f21 | 786 | !machine__is_default_guest(machine)) |
b7cece76 | 787 | goto discard_symbol; |
af427bf5 | 788 | } |
2e538c4a ACM |
789 | /* |
790 | * So that we look just like we get from .ko files, | |
15e0e2d4 | 791 | * i.e. not prelinked, relative to initial_map->start. |
2e538c4a | 792 | */ |
4e06255f ACM |
793 | pos->start = curr_map->map_ip(curr_map, pos->start); |
794 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
4d004365 AH |
795 | } else if (x86_64 && is_entry_trampoline(pos->name)) { |
796 | /* | |
797 | * These symbols are not needed anymore since the | |
798 | * trampoline maps refer to the text section and it's | |
799 | * symbols instead. Avoid having to deal with | |
800 | * relocations, and the assumption that the first symbol | |
801 | * is the start of kernel text, by simply removing the | |
802 | * symbols at this point. | |
803 | */ | |
804 | goto discard_symbol; | |
15e0e2d4 | 805 | } else if (curr_map != initial_map) { |
2e538c4a | 806 | char dso_name[PATH_MAX]; |
aeafcbaf | 807 | struct dso *ndso; |
2e538c4a | 808 | |
d9b62aba AH |
809 | if (delta) { |
810 | /* Kernel was relocated at boot time */ | |
811 | pos->start -= delta; | |
812 | pos->end -= delta; | |
813 | } | |
814 | ||
8a953312 | 815 | if (count == 0) { |
15e0e2d4 | 816 | curr_map = initial_map; |
be39db9f | 817 | goto add_symbol; |
8a953312 ACM |
818 | } |
819 | ||
aeafcbaf | 820 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
821 | snprintf(dso_name, sizeof(dso_name), |
822 | "[guest.kernel].%d", | |
823 | kernel_range++); | |
824 | else | |
825 | snprintf(dso_name, sizeof(dso_name), | |
826 | "[kernel].%d", | |
827 | kernel_range++); | |
2e538c4a | 828 | |
aeafcbaf ACM |
829 | ndso = dso__new(dso_name); |
830 | if (ndso == NULL) | |
2e538c4a ACM |
831 | return -1; |
832 | ||
aeafcbaf | 833 | ndso->kernel = dso->kernel; |
a1645ce1 | 834 | |
3183f8ca | 835 | curr_map = map__new2(pos->start, ndso); |
37fe5fcb | 836 | if (curr_map == NULL) { |
d3a7c489 | 837 | dso__put(ndso); |
2e538c4a ACM |
838 | return -1; |
839 | } | |
a2928c42 | 840 | |
4e06255f | 841 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 842 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 843 | ++kernel_range; |
d9b62aba AH |
844 | } else if (delta) { |
845 | /* Kernel was relocated at boot time */ | |
846 | pos->start -= delta; | |
847 | pos->end -= delta; | |
2e538c4a | 848 | } |
be39db9f | 849 | add_symbol: |
15e0e2d4 | 850 | if (curr_map != initial_map) { |
be39db9f | 851 | rb_erase(&pos->rb_node, root); |
3183f8ca | 852 | symbols__insert(&curr_map->dso->symbols, pos); |
be39db9f ACM |
853 | ++moved; |
854 | } else | |
855 | ++count; | |
856 | ||
857 | continue; | |
858 | discard_symbol: | |
859 | rb_erase(&pos->rb_node, root); | |
860 | symbol__delete(pos); | |
a2928c42 ACM |
861 | } |
862 | ||
15e0e2d4 | 863 | if (curr_map != initial_map && |
aeafcbaf | 864 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 865 | machine__is_default_guest(kmaps->machine)) { |
3183f8ca | 866 | dso__set_loaded(curr_map->dso); |
a1645ce1 ZY |
867 | } |
868 | ||
8a953312 | 869 | return count + moved; |
2e538c4a | 870 | } |
a2928c42 | 871 | |
3f067dca ACM |
872 | bool symbol__restricted_filename(const char *filename, |
873 | const char *restricted_filename) | |
ec80fde7 ACM |
874 | { |
875 | bool restricted = false; | |
876 | ||
877 | if (symbol_conf.kptr_restrict) { | |
878 | char *r = realpath(filename, NULL); | |
879 | ||
880 | if (r != NULL) { | |
881 | restricted = strcmp(r, restricted_filename) == 0; | |
882 | free(r); | |
883 | return restricted; | |
884 | } | |
885 | } | |
886 | ||
887 | return restricted; | |
888 | } | |
889 | ||
52afdaf9 AH |
890 | struct module_info { |
891 | struct rb_node rb_node; | |
892 | char *name; | |
893 | u64 start; | |
8e0cf965 AH |
894 | }; |
895 | ||
52afdaf9 | 896 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 897 | { |
52afdaf9 AH |
898 | struct rb_node **p = &modules->rb_node; |
899 | struct rb_node *parent = NULL; | |
900 | struct module_info *m; | |
8e0cf965 | 901 | |
52afdaf9 AH |
902 | while (*p != NULL) { |
903 | parent = *p; | |
904 | m = rb_entry(parent, struct module_info, rb_node); | |
905 | if (strcmp(mi->name, m->name) < 0) | |
906 | p = &(*p)->rb_left; | |
907 | else | |
908 | p = &(*p)->rb_right; | |
909 | } | |
910 | rb_link_node(&mi->rb_node, parent, p); | |
911 | rb_insert_color(&mi->rb_node, modules); | |
912 | } | |
913 | ||
914 | static void delete_modules(struct rb_root *modules) | |
915 | { | |
916 | struct module_info *mi; | |
917 | struct rb_node *next = rb_first(modules); | |
918 | ||
919 | while (next) { | |
920 | mi = rb_entry(next, struct module_info, rb_node); | |
921 | next = rb_next(&mi->rb_node); | |
922 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 923 | zfree(&mi->name); |
52afdaf9 AH |
924 | free(mi); |
925 | } | |
926 | } | |
927 | ||
928 | static struct module_info *find_module(const char *name, | |
929 | struct rb_root *modules) | |
930 | { | |
931 | struct rb_node *n = modules->rb_node; | |
932 | ||
933 | while (n) { | |
934 | struct module_info *m; | |
935 | int cmp; | |
936 | ||
937 | m = rb_entry(n, struct module_info, rb_node); | |
938 | cmp = strcmp(name, m->name); | |
939 | if (cmp < 0) | |
940 | n = n->rb_left; | |
941 | else if (cmp > 0) | |
942 | n = n->rb_right; | |
943 | else | |
944 | return m; | |
945 | } | |
946 | ||
947 | return NULL; | |
948 | } | |
949 | ||
9ad4652b TR |
950 | static int __read_proc_modules(void *arg, const char *name, u64 start, |
951 | u64 size __maybe_unused) | |
52afdaf9 AH |
952 | { |
953 | struct rb_root *modules = arg; | |
954 | struct module_info *mi; | |
955 | ||
956 | mi = zalloc(sizeof(struct module_info)); | |
957 | if (!mi) | |
8e0cf965 AH |
958 | return -ENOMEM; |
959 | ||
52afdaf9 AH |
960 | mi->name = strdup(name); |
961 | mi->start = start; | |
8e0cf965 | 962 | |
52afdaf9 AH |
963 | if (!mi->name) { |
964 | free(mi); | |
965 | return -ENOMEM; | |
966 | } | |
967 | ||
968 | add_module(mi, modules); | |
969 | ||
970 | return 0; | |
971 | } | |
972 | ||
973 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
974 | { | |
975 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
976 | return -1; | |
977 | ||
978 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
979 | delete_modules(modules); | |
980 | return -1; | |
981 | } | |
8e0cf965 AH |
982 | |
983 | return 0; | |
984 | } | |
985 | ||
fc1b691d AH |
986 | int compare_proc_modules(const char *from, const char *to) |
987 | { | |
988 | struct rb_root from_modules = RB_ROOT; | |
989 | struct rb_root to_modules = RB_ROOT; | |
990 | struct rb_node *from_node, *to_node; | |
991 | struct module_info *from_m, *to_m; | |
992 | int ret = -1; | |
993 | ||
994 | if (read_proc_modules(from, &from_modules)) | |
995 | return -1; | |
996 | ||
997 | if (read_proc_modules(to, &to_modules)) | |
998 | goto out_delete_from; | |
999 | ||
1000 | from_node = rb_first(&from_modules); | |
1001 | to_node = rb_first(&to_modules); | |
1002 | while (from_node) { | |
1003 | if (!to_node) | |
1004 | break; | |
1005 | ||
1006 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
1007 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
1008 | ||
1009 | if (from_m->start != to_m->start || | |
1010 | strcmp(from_m->name, to_m->name)) | |
1011 | break; | |
1012 | ||
1013 | from_node = rb_next(from_node); | |
1014 | to_node = rb_next(to_node); | |
1015 | } | |
1016 | ||
1017 | if (!from_node && !to_node) | |
1018 | ret = 0; | |
1019 | ||
1020 | delete_modules(&to_modules); | |
1021 | out_delete_from: | |
1022 | delete_modules(&from_modules); | |
1023 | ||
1024 | return ret; | |
1025 | } | |
1026 | ||
dce0478b ACM |
1027 | struct map *map_groups__first(struct map_groups *mg) |
1028 | { | |
3183f8ca | 1029 | return maps__first(&mg->maps); |
dce0478b ACM |
1030 | } |
1031 | ||
5759a682 | 1032 | static int do_validate_kcore_modules(const char *filename, |
52afdaf9 AH |
1033 | struct map_groups *kmaps) |
1034 | { | |
1035 | struct rb_root modules = RB_ROOT; | |
1036 | struct map *old_map; | |
1037 | int err; | |
1038 | ||
1039 | err = read_proc_modules(filename, &modules); | |
1040 | if (err) | |
1041 | return err; | |
1042 | ||
3183f8ca | 1043 | old_map = map_groups__first(kmaps); |
52afdaf9 AH |
1044 | while (old_map) { |
1045 | struct map *next = map_groups__next(old_map); | |
1046 | struct module_info *mi; | |
1047 | ||
5759a682 | 1048 | if (!__map__is_kmodule(old_map)) { |
52afdaf9 AH |
1049 | old_map = next; |
1050 | continue; | |
1051 | } | |
1052 | ||
1053 | /* Module must be in memory at the same address */ | |
1054 | mi = find_module(old_map->dso->short_name, &modules); | |
1055 | if (!mi || mi->start != old_map->start) { | |
1056 | err = -EINVAL; | |
1057 | goto out; | |
1058 | } | |
1059 | ||
1060 | old_map = next; | |
1061 | } | |
1062 | out: | |
1063 | delete_modules(&modules); | |
1064 | return err; | |
1065 | } | |
1066 | ||
8e0cf965 | 1067 | /* |
52afdaf9 | 1068 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1069 | * directory. |
1070 | */ | |
52afdaf9 AH |
1071 | static bool filename_from_kallsyms_filename(char *filename, |
1072 | const char *base_name, | |
1073 | const char *kallsyms_filename) | |
8e0cf965 AH |
1074 | { |
1075 | char *name; | |
1076 | ||
52afdaf9 AH |
1077 | strcpy(filename, kallsyms_filename); |
1078 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1079 | if (!name) |
1080 | return false; | |
1081 | ||
52afdaf9 AH |
1082 | name += 1; |
1083 | ||
1084 | if (!strcmp(name, "kallsyms")) { | |
1085 | strcpy(name, base_name); | |
8e0cf965 AH |
1086 | return true; |
1087 | } | |
1088 | ||
1089 | return false; | |
1090 | } | |
1091 | ||
52afdaf9 AH |
1092 | static int validate_kcore_modules(const char *kallsyms_filename, |
1093 | struct map *map) | |
1094 | { | |
ba92732e | 1095 | struct map_groups *kmaps = map__kmaps(map); |
52afdaf9 AH |
1096 | char modules_filename[PATH_MAX]; |
1097 | ||
ba92732e WN |
1098 | if (!kmaps) |
1099 | return -EINVAL; | |
1100 | ||
52afdaf9 AH |
1101 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1102 | kallsyms_filename)) | |
1103 | return -EINVAL; | |
1104 | ||
5759a682 | 1105 | if (do_validate_kcore_modules(modules_filename, kmaps)) |
52afdaf9 AH |
1106 | return -EINVAL; |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
a00d28cb AH |
1111 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1112 | struct map *map) | |
1113 | { | |
1114 | struct kmap *kmap = map__kmap(map); | |
1115 | ||
ba92732e WN |
1116 | if (!kmap) |
1117 | return -EINVAL; | |
1118 | ||
a00d28cb AH |
1119 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1120 | u64 start; | |
1121 | ||
b843f62a ACM |
1122 | if (kallsyms__get_function_start(kallsyms_filename, |
1123 | kmap->ref_reloc_sym->name, &start)) | |
1124 | return -ENOENT; | |
a00d28cb AH |
1125 | if (start != kmap->ref_reloc_sym->addr) |
1126 | return -EINVAL; | |
1127 | } | |
1128 | ||
1129 | return validate_kcore_modules(kallsyms_filename, map); | |
1130 | } | |
1131 | ||
52afdaf9 AH |
1132 | struct kcore_mapfn_data { |
1133 | struct dso *dso; | |
52afdaf9 AH |
1134 | struct list_head maps; |
1135 | }; | |
1136 | ||
1137 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1138 | { | |
1139 | struct kcore_mapfn_data *md = data; | |
1140 | struct map *map; | |
1141 | ||
3183f8ca | 1142 | map = map__new2(start, md->dso); |
52afdaf9 AH |
1143 | if (map == NULL) |
1144 | return -ENOMEM; | |
1145 | ||
1146 | map->end = map->start + len; | |
1147 | map->pgoff = pgoff; | |
1148 | ||
1149 | list_add(&map->node, &md->maps); | |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
8e0cf965 AH |
1154 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1155 | const char *kallsyms_filename) | |
1156 | { | |
ba92732e | 1157 | struct map_groups *kmaps = map__kmaps(map); |
8e0cf965 AH |
1158 | struct kcore_mapfn_data md; |
1159 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1c5aae77 | 1160 | struct machine *machine; |
8e0cf965 AH |
1161 | bool is_64_bit; |
1162 | int err, fd; | |
1163 | char kcore_filename[PATH_MAX]; | |
56549978 | 1164 | u64 stext; |
8e0cf965 | 1165 | |
ba92732e WN |
1166 | if (!kmaps) |
1167 | return -EINVAL; | |
1168 | ||
1c5aae77 AH |
1169 | machine = kmaps->machine; |
1170 | ||
8e0cf965 | 1171 | /* This function requires that the map is the kernel map */ |
efdd5c6b | 1172 | if (!__map__is_kernel(map)) |
8e0cf965 AH |
1173 | return -EINVAL; |
1174 | ||
52afdaf9 AH |
1175 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1176 | kallsyms_filename)) | |
1177 | return -EINVAL; | |
1178 | ||
a00d28cb AH |
1179 | /* Modules and kernel must be present at their original addresses */ |
1180 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1181 | return -EINVAL; |
1182 | ||
1183 | md.dso = dso; | |
8e0cf965 AH |
1184 | INIT_LIST_HEAD(&md.maps); |
1185 | ||
1186 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1187 | if (fd < 0) { |
133de940 AH |
1188 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1189 | kcore_filename); | |
8e0cf965 | 1190 | return -EINVAL; |
36c8bb56 | 1191 | } |
8e0cf965 AH |
1192 | |
1193 | /* Read new maps into temporary lists */ | |
e9814df8 | 1194 | err = file__read_maps(fd, map->prot & PROT_EXEC, kcore_mapfn, &md, |
8e0cf965 AH |
1195 | &is_64_bit); |
1196 | if (err) | |
1197 | goto out_err; | |
c6d8f2a4 | 1198 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1199 | |
1200 | if (list_empty(&md.maps)) { | |
1201 | err = -EINVAL; | |
1202 | goto out_err; | |
1203 | } | |
1204 | ||
1205 | /* Remove old maps */ | |
3183f8ca | 1206 | old_map = map_groups__first(kmaps); |
8e0cf965 AH |
1207 | while (old_map) { |
1208 | struct map *next = map_groups__next(old_map); | |
1209 | ||
1210 | if (old_map != map) | |
1211 | map_groups__remove(kmaps, old_map); | |
1212 | old_map = next; | |
1213 | } | |
1c5aae77 | 1214 | machine->trampolines_mapped = false; |
8e0cf965 | 1215 | |
56549978 AH |
1216 | /* Find the kernel map using the '_stext' symbol */ |
1217 | if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) { | |
1218 | list_for_each_entry(new_map, &md.maps, node) { | |
1219 | if (stext >= new_map->start && stext < new_map->end) { | |
1220 | replacement_map = new_map; | |
1221 | break; | |
1222 | } | |
8e0cf965 AH |
1223 | } |
1224 | } | |
1225 | ||
1226 | if (!replacement_map) | |
1227 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1228 | ||
1229 | /* Add new maps */ | |
1230 | while (!list_empty(&md.maps)) { | |
1231 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1232 | list_del_init(&new_map->node); |
8e0cf965 AH |
1233 | if (new_map == replacement_map) { |
1234 | map->start = new_map->start; | |
1235 | map->end = new_map->end; | |
1236 | map->pgoff = new_map->pgoff; | |
1237 | map->map_ip = new_map->map_ip; | |
1238 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1239 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1240 | map__get(map); |
8e0cf965 AH |
1241 | map_groups__remove(kmaps, map); |
1242 | map_groups__insert(kmaps, map); | |
84c2cafa | 1243 | map__put(map); |
8e0cf965 AH |
1244 | } else { |
1245 | map_groups__insert(kmaps, new_map); | |
1246 | } | |
84c2cafa ACM |
1247 | |
1248 | map__put(new_map); | |
8e0cf965 AH |
1249 | } |
1250 | ||
1c5aae77 AH |
1251 | if (machine__is(machine, "x86_64")) { |
1252 | u64 addr; | |
1253 | ||
1254 | /* | |
1255 | * If one of the corresponding symbols is there, assume the | |
1256 | * entry trampoline maps are too. | |
1257 | */ | |
1258 | if (!kallsyms__get_function_start(kallsyms_filename, | |
1259 | ENTRY_TRAMPOLINE_NAME, | |
1260 | &addr)) | |
1261 | machine->trampolines_mapped = true; | |
1262 | } | |
1263 | ||
8e0cf965 AH |
1264 | /* |
1265 | * Set the data type and long name so that kcore can be read via | |
1266 | * dso__data_read_addr(). | |
1267 | */ | |
1268 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1269 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1270 | else |
5f70619d | 1271 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1272 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1273 | |
1274 | close(fd); | |
1275 | ||
e9814df8 | 1276 | if (map->prot & PROT_EXEC) |
8e0cf965 AH |
1277 | pr_debug("Using %s for kernel object code\n", kcore_filename); |
1278 | else | |
1279 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1280 | ||
1281 | return 0; | |
1282 | ||
1283 | out_err: | |
1284 | while (!list_empty(&md.maps)) { | |
1285 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1286 | list_del_init(&map->node); |
84c2cafa | 1287 | map__put(map); |
8e0cf965 AH |
1288 | } |
1289 | close(fd); | |
1290 | return -EINVAL; | |
1291 | } | |
1292 | ||
d9b62aba AH |
1293 | /* |
1294 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1295 | * delta based on the relocation reference symbol. | |
1296 | */ | |
019c6820 | 1297 | static int kallsyms__delta(struct kmap *kmap, const char *filename, u64 *delta) |
d9b62aba | 1298 | { |
d9b62aba AH |
1299 | u64 addr; |
1300 | ||
1301 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) | |
1302 | return 0; | |
1303 | ||
b843f62a | 1304 | if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr)) |
d9b62aba AH |
1305 | return -1; |
1306 | ||
1307 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1308 | return 0; | |
1309 | } | |
1310 | ||
e02092b9 | 1311 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1312 | struct map *map, bool no_kcore) |
2e538c4a | 1313 | { |
019c6820 | 1314 | struct kmap *kmap = map__kmap(map); |
d9b62aba AH |
1315 | u64 delta = 0; |
1316 | ||
ec80fde7 ACM |
1317 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1318 | return -1; | |
1319 | ||
019c6820 ACM |
1320 | if (!kmap || !kmap->kmaps) |
1321 | return -1; | |
1322 | ||
333cc76c | 1323 | if (dso__load_all_kallsyms(dso, filename) < 0) |
2e538c4a ACM |
1324 | return -1; |
1325 | ||
019c6820 | 1326 | if (kallsyms__delta(kmap, filename, &delta)) |
d9b62aba AH |
1327 | return -1; |
1328 | ||
3183f8ca ACM |
1329 | symbols__fixup_end(&dso->symbols); |
1330 | symbols__fixup_duplicate(&dso->symbols); | |
3f5a4272 | 1331 | |
aeafcbaf | 1332 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1333 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1334 | else |
44f24cb3 | 1335 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1336 | |
e02092b9 | 1337 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
15e0e2d4 | 1338 | return map_groups__split_kallsyms_for_kcore(kmap->kmaps, dso); |
8e0cf965 | 1339 | else |
15e0e2d4 | 1340 | return map_groups__split_kallsyms(kmap->kmaps, dso, delta, map); |
af427bf5 ACM |
1341 | } |
1342 | ||
e02092b9 | 1343 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1344 | struct map *map) |
e02092b9 | 1345 | { |
be39db9f | 1346 | return __dso__load_kallsyms(dso, filename, map, false); |
e02092b9 ACM |
1347 | } |
1348 | ||
3183f8ca | 1349 | static int dso__load_perf_map(const char *map_path, struct dso *dso) |
80d496be PE |
1350 | { |
1351 | char *line = NULL; | |
1352 | size_t n; | |
1353 | FILE *file; | |
1354 | int nr_syms = 0; | |
1355 | ||
bf2e710b | 1356 | file = fopen(map_path, "r"); |
80d496be PE |
1357 | if (file == NULL) |
1358 | goto out_failure; | |
1359 | ||
1360 | while (!feof(file)) { | |
9cffa8d5 | 1361 | u64 start, size; |
80d496be PE |
1362 | struct symbol *sym; |
1363 | int line_len, len; | |
1364 | ||
1365 | line_len = getline(&line, &n, file); | |
1366 | if (line_len < 0) | |
1367 | break; | |
1368 | ||
1369 | if (!line) | |
1370 | goto out_failure; | |
1371 | ||
1372 | line[--line_len] = '\0'; /* \n */ | |
1373 | ||
1374 | len = hex2u64(line, &start); | |
1375 | ||
1376 | len++; | |
1377 | if (len + 2 >= line_len) | |
1378 | continue; | |
1379 | ||
1380 | len += hex2u64(line + len, &size); | |
1381 | ||
1382 | len++; | |
1383 | if (len + 2 >= line_len) | |
1384 | continue; | |
1385 | ||
af30bffa | 1386 | sym = symbol__new(start, size, STB_GLOBAL, STT_FUNC, line + len); |
80d496be PE |
1387 | |
1388 | if (sym == NULL) | |
1389 | goto out_delete_line; | |
1390 | ||
3183f8ca | 1391 | symbols__insert(&dso->symbols, sym); |
be39db9f | 1392 | nr_syms++; |
80d496be PE |
1393 | } |
1394 | ||
1395 | free(line); | |
1396 | fclose(file); | |
1397 | ||
1398 | return nr_syms; | |
1399 | ||
1400 | out_delete_line: | |
1401 | free(line); | |
1402 | out_failure: | |
1403 | return -1; | |
1404 | } | |
1405 | ||
1029f9fe NK |
1406 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1407 | enum dso_binary_type type) | |
1408 | { | |
1409 | switch (type) { | |
1410 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1411 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1412 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1413 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1414 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1415 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1416 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1417 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1418 | ||
1419 | case DSO_BINARY_TYPE__KALLSYMS: | |
1420 | case DSO_BINARY_TYPE__VMLINUX: | |
1421 | case DSO_BINARY_TYPE__KCORE: | |
1422 | return dso->kernel == DSO_TYPE_KERNEL; | |
1423 | ||
1424 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1425 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1426 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1427 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1428 | ||
1429 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1430 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1431 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1432 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1433 | /* |
1434 | * kernel modules know their symtab type - it's set when | |
9f2de315 | 1435 | * creating a module dso in machine__findnew_module_map(). |
1029f9fe NK |
1436 | */ |
1437 | return kmod && dso->symtab_type == type; | |
1438 | ||
1439 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
d2396999 | 1440 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
1029f9fe NK |
1441 | return true; |
1442 | ||
1443 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1444 | default: | |
1445 | return false; | |
1446 | } | |
1447 | } | |
1448 | ||
bf2e710b KJ |
1449 | /* Checks for the existence of the perf-<pid>.map file in two different |
1450 | * locations. First, if the process is a separate mount namespace, check in | |
1451 | * that namespace using the pid of the innermost pid namespace. If's not in a | |
1452 | * namespace, or the file can't be found there, try in the mount namespace of | |
1453 | * the tracing process using our view of its pid. | |
1454 | */ | |
1455 | static int dso__find_perf_map(char *filebuf, size_t bufsz, | |
1456 | struct nsinfo **nsip) | |
1457 | { | |
1458 | struct nscookie nsc; | |
1459 | struct nsinfo *nsi; | |
1460 | struct nsinfo *nnsi; | |
1461 | int rc = -1; | |
1462 | ||
1463 | nsi = *nsip; | |
1464 | ||
1465 | if (nsi->need_setns) { | |
1466 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid); | |
1467 | nsinfo__mountns_enter(nsi, &nsc); | |
1468 | rc = access(filebuf, R_OK); | |
1469 | nsinfo__mountns_exit(&nsc); | |
1470 | if (rc == 0) | |
1471 | return rc; | |
1472 | } | |
1473 | ||
1474 | nnsi = nsinfo__copy(nsi); | |
1475 | if (nnsi) { | |
1476 | nsinfo__put(nsi); | |
1477 | ||
1478 | nnsi->need_setns = false; | |
1479 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid); | |
1480 | *nsip = nnsi; | |
1481 | rc = 0; | |
1482 | } | |
1483 | ||
1484 | return rc; | |
1485 | } | |
1486 | ||
be39db9f | 1487 | int dso__load(struct dso *dso, struct map *map) |
a2928c42 | 1488 | { |
c338aee8 | 1489 | char *name; |
a2928c42 | 1490 | int ret = -1; |
44f24cb3 | 1491 | u_int i; |
23346f21 | 1492 | struct machine *machine; |
44f24cb3 | 1493 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1494 | int ss_pos = 0; |
1495 | struct symsrc ss_[2]; | |
1496 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1497 | bool kmod; |
bf2e710b | 1498 | bool perfmap; |
5baecbcd | 1499 | unsigned char build_id[BUILD_ID_SIZE]; |
843ff37b | 1500 | struct nscookie nsc; |
bf2e710b KJ |
1501 | char newmapname[PATH_MAX]; |
1502 | const char *map_path = dso->long_name; | |
1503 | ||
1504 | perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0; | |
1505 | if (perfmap) { | |
1506 | if (dso->nsinfo && (dso__find_perf_map(newmapname, | |
1507 | sizeof(newmapname), &dso->nsinfo) == 0)) { | |
1508 | map_path = newmapname; | |
1509 | } | |
1510 | } | |
a2928c42 | 1511 | |
843ff37b | 1512 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
4a936edc NK |
1513 | pthread_mutex_lock(&dso->lock); |
1514 | ||
1515 | /* check again under the dso->lock */ | |
3183f8ca | 1516 | if (dso__loaded(dso)) { |
4a936edc NK |
1517 | ret = 1; |
1518 | goto out; | |
1519 | } | |
66bd8424 | 1520 | |
4d99e413 AH |
1521 | if (map->groups && map->groups->machine) |
1522 | machine = map->groups->machine; | |
1523 | else | |
1524 | machine = NULL; | |
1525 | ||
4a936edc NK |
1526 | if (dso->kernel) { |
1527 | if (dso->kernel == DSO_TYPE_KERNEL) | |
be39db9f | 1528 | ret = dso__load_kernel_sym(dso, map); |
4a936edc | 1529 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
be39db9f | 1530 | ret = dso__load_guest_kernel_sym(dso, map); |
4a936edc | 1531 | |
4d99e413 AH |
1532 | if (machine__is(machine, "x86_64")) |
1533 | machine__map_x86_64_entry_trampolines(machine, dso); | |
4a936edc NK |
1534 | goto out; |
1535 | } | |
a1645ce1 | 1536 | |
aeafcbaf | 1537 | dso->adjust_symbols = 0; |
f5812a7a | 1538 | |
bf2e710b | 1539 | if (perfmap) { |
981c1252 PE |
1540 | struct stat st; |
1541 | ||
bf2e710b | 1542 | if (lstat(map_path, &st) < 0) |
4a936edc | 1543 | goto out; |
981c1252 | 1544 | |
2059fc7a | 1545 | if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) { |
981c1252 | 1546 | pr_warning("File %s not owned by current user or root, " |
bf2e710b | 1547 | "ignoring it (use -f to override).\n", map_path); |
4a936edc | 1548 | goto out; |
981c1252 PE |
1549 | } |
1550 | ||
3183f8ca | 1551 | ret = dso__load_perf_map(map_path, dso); |
44f24cb3 JO |
1552 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1553 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1554 | goto out; |
94cb9e38 ACM |
1555 | } |
1556 | ||
44f24cb3 JO |
1557 | if (machine) |
1558 | root_dir = machine->root_dir; | |
1559 | ||
164c800e DA |
1560 | name = malloc(PATH_MAX); |
1561 | if (!name) | |
4a936edc | 1562 | goto out; |
164c800e | 1563 | |
1029f9fe | 1564 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
c00c48fc NK |
1565 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
1566 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1567 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1029f9fe | 1568 | |
5baecbcd DK |
1569 | |
1570 | /* | |
1571 | * Read the build id if possible. This is required for | |
1572 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1573 | */ | |
ed6c166c | 1574 | if (!dso->has_build_id && |
9b200653 VK |
1575 | is_regular_file(dso->long_name)) { |
1576 | __symbol__join_symfs(name, PATH_MAX, dso->long_name); | |
1577 | if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0) | |
5baecbcd | 1578 | dso__set_build_id(dso, build_id); |
9b200653 | 1579 | } |
5baecbcd | 1580 | |
1029f9fe NK |
1581 | /* |
1582 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1583 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1584 | * and/or opd section) for processing. | |
6da80ce8 | 1585 | */ |
44f24cb3 | 1586 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1587 | struct symsrc *ss = &ss_[ss_pos]; |
1588 | bool next_slot = false; | |
f045b8c4 | 1589 | bool is_reg; |
d2396999 | 1590 | bool nsexit; |
c3962961 | 1591 | int sirc = -1; |
6da80ce8 | 1592 | |
005f9294 | 1593 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1594 | |
d2396999 KJ |
1595 | nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE || |
1596 | symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO); | |
1597 | ||
1029f9fe NK |
1598 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1599 | continue; | |
1600 | ||
ee4e9625 ACM |
1601 | if (dso__read_binary_type_filename(dso, symtab_type, |
1602 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1603 | continue; |
6da80ce8 | 1604 | |
d2396999 | 1605 | if (nsexit) |
f045b8c4 KJ |
1606 | nsinfo__mountns_exit(&nsc); |
1607 | ||
1608 | is_reg = is_regular_file(name); | |
c3962961 JO |
1609 | if (is_reg) |
1610 | sirc = symsrc__init(ss, dso, name, symtab_type); | |
40356721 | 1611 | |
d2396999 | 1612 | if (nsexit) |
f045b8c4 KJ |
1613 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
1614 | ||
c3962961 | 1615 | if (!is_reg || sirc < 0) |
6da80ce8 | 1616 | continue; |
a2928c42 | 1617 | |
3aafe5ae CS |
1618 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1619 | syms_ss = ss; | |
1620 | next_slot = true; | |
0058aef6 AH |
1621 | if (!dso->symsrc_filename) |
1622 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1623 | } |
1624 | ||
3aafe5ae CS |
1625 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1626 | runtime_ss = ss; | |
1627 | next_slot = true; | |
a44f605b | 1628 | } |
a2928c42 | 1629 | |
3aafe5ae CS |
1630 | if (next_slot) { |
1631 | ss_pos++; | |
33ff581e | 1632 | |
3aafe5ae CS |
1633 | if (syms_ss && runtime_ss) |
1634 | break; | |
98e9f03b NK |
1635 | } else { |
1636 | symsrc__destroy(ss); | |
6da80ce8 | 1637 | } |
3aafe5ae | 1638 | |
a25e46c4 | 1639 | } |
6da80ce8 | 1640 | |
3aafe5ae CS |
1641 | if (!runtime_ss && !syms_ss) |
1642 | goto out_free; | |
1643 | ||
1644 | if (runtime_ss && !syms_ss) { | |
1645 | syms_ss = runtime_ss; | |
1646 | } | |
1647 | ||
1648 | /* We'll have to hope for the best */ | |
1649 | if (!runtime_ss && syms_ss) | |
1650 | runtime_ss = syms_ss; | |
1651 | ||
1029f9fe | 1652 | if (syms_ss) |
be39db9f | 1653 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod); |
1029f9fe | 1654 | else |
3aafe5ae CS |
1655 | ret = -1; |
1656 | ||
f47b58b7 | 1657 | if (ret > 0) { |
3aafe5ae CS |
1658 | int nr_plt; |
1659 | ||
3183f8ca | 1660 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss); |
3aafe5ae CS |
1661 | if (nr_plt > 0) |
1662 | ret += nr_plt; | |
60e4b10c ACM |
1663 | } |
1664 | ||
3aafe5ae CS |
1665 | for (; ss_pos > 0; ss_pos--) |
1666 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1667 | out_free: | |
a2928c42 | 1668 | free(name); |
aeafcbaf | 1669 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1670 | ret = 0; |
1671 | out: | |
3183f8ca | 1672 | dso__set_loaded(dso); |
4a936edc | 1673 | pthread_mutex_unlock(&dso->lock); |
843ff37b | 1674 | nsinfo__mountns_exit(&nsc); |
4a936edc | 1675 | |
a2928c42 ACM |
1676 | return ret; |
1677 | } | |
1678 | ||
3183f8ca | 1679 | struct map *map_groups__find_by_name(struct map_groups *mg, const char *name) |
439d473b | 1680 | { |
3183f8ca | 1681 | struct maps *maps = &mg->maps; |
4bb7123d | 1682 | struct map *map; |
439d473b | 1683 | |
0a7c74ea | 1684 | down_read(&maps->lock); |
6a2ffcdd | 1685 | |
4bb7123d | 1686 | for (map = maps__first(maps); map; map = map__next(map)) { |
b7cece76 | 1687 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
6a2ffcdd | 1688 | goto out_unlock; |
439d473b ACM |
1689 | } |
1690 | ||
6a2ffcdd ACM |
1691 | map = NULL; |
1692 | ||
1693 | out_unlock: | |
0a7c74ea | 1694 | up_read(&maps->lock); |
6a2ffcdd | 1695 | return map; |
439d473b ACM |
1696 | } |
1697 | ||
aeafcbaf | 1698 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
be39db9f | 1699 | const char *vmlinux, bool vmlinux_allocated) |
a2928c42 | 1700 | { |
b68e2f91 CS |
1701 | int err = -1; |
1702 | struct symsrc ss; | |
ec5761ea | 1703 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1704 | enum dso_binary_type symtab_type; |
a2928c42 | 1705 | |
5698d2c9 NK |
1706 | if (vmlinux[0] == '/') |
1707 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1708 | else | |
972f393b | 1709 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1710 | |
21ea4539 | 1711 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1712 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1713 | else |
005f9294 | 1714 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1715 | |
005f9294 | 1716 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1717 | return -1; |
1718 | ||
be39db9f | 1719 | err = dso__load_sym(dso, map, &ss, &ss, 0); |
b68e2f91 | 1720 | symsrc__destroy(&ss); |
a2928c42 | 1721 | |
515850e4 | 1722 | if (err > 0) { |
39b12f78 | 1723 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1724 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1725 | else |
5f70619d | 1726 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1727 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
3183f8ca | 1728 | dso__set_loaded(dso); |
ec5761ea | 1729 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1730 | } |
3846df2e | 1731 | |
a2928c42 ACM |
1732 | return err; |
1733 | } | |
1734 | ||
be39db9f | 1735 | int dso__load_vmlinux_path(struct dso *dso, struct map *map) |
a19afe46 ACM |
1736 | { |
1737 | int i, err = 0; | |
00dc8657 | 1738 | char *filename = NULL; |
a19afe46 | 1739 | |
dc38218e ACM |
1740 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
1741 | vmlinux_path__nr_entries + 1); | |
1742 | ||
1743 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
be39db9f | 1744 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false); |
dc38218e ACM |
1745 | if (err > 0) |
1746 | goto out; | |
1747 | } | |
1748 | ||
00dc8657 | 1749 | if (!symbol_conf.ignore_vmlinux_buildid) |
d2396999 | 1750 | filename = dso__build_id_filename(dso, NULL, 0, false); |
5ad90e4e | 1751 | if (filename != NULL) { |
be39db9f | 1752 | err = dso__load_vmlinux(dso, map, filename, true); |
5230fb7d | 1753 | if (err > 0) |
5ad90e4e | 1754 | goto out; |
5ad90e4e ACM |
1755 | free(filename); |
1756 | } | |
5ad90e4e | 1757 | out: |
a19afe46 ACM |
1758 | return err; |
1759 | } | |
1760 | ||
c48903b8 MH |
1761 | static bool visible_dir_filter(const char *name, struct dirent *d) |
1762 | { | |
1763 | if (d->d_type != DT_DIR) | |
1764 | return false; | |
1765 | return lsdir_no_dot_filter(name, d); | |
1766 | } | |
1767 | ||
0544d422 AH |
1768 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1769 | { | |
1770 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 1771 | int ret = -1; |
c48903b8 MH |
1772 | struct strlist *dirs; |
1773 | struct str_node *nd; | |
0544d422 | 1774 | |
c48903b8 MH |
1775 | dirs = lsdir(dir, visible_dir_filter); |
1776 | if (!dirs) | |
0544d422 AH |
1777 | return -1; |
1778 | ||
602a1f4d | 1779 | strlist__for_each_entry(nd, dirs) { |
0544d422 | 1780 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 1781 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 1782 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1783 | strlcpy(dir, kallsyms_filename, dir_sz); |
1784 | ret = 0; | |
1785 | break; | |
1786 | } | |
1787 | } | |
1788 | ||
c48903b8 | 1789 | strlist__delete(dirs); |
0544d422 AH |
1790 | |
1791 | return ret; | |
1792 | } | |
1793 | ||
11870d71 MH |
1794 | /* |
1795 | * Use open(O_RDONLY) to check readability directly instead of access(R_OK) | |
1796 | * since access(R_OK) only checks with real UID/GID but open() use effective | |
1797 | * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO). | |
1798 | */ | |
1799 | static bool filename__readable(const char *file) | |
1800 | { | |
1801 | int fd = open(file, O_RDONLY); | |
1802 | if (fd < 0) | |
1803 | return false; | |
1804 | close(fd); | |
1805 | return true; | |
1806 | } | |
1807 | ||
0544d422 AH |
1808 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) |
1809 | { | |
1810 | u8 host_build_id[BUILD_ID_SIZE]; | |
b5d8bbe8 | 1811 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
1812 | bool is_host = false; |
1813 | char path[PATH_MAX]; | |
1814 | ||
1815 | if (!dso->has_build_id) { | |
1816 | /* | |
1817 | * Last resort, if we don't have a build-id and couldn't find | |
1818 | * any vmlinux file, try the running kernel kallsyms table. | |
1819 | */ | |
1820 | goto proc_kallsyms; | |
1821 | } | |
1822 | ||
1823 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1824 | sizeof(host_build_id)) == 0) | |
1825 | is_host = dso__build_id_equal(dso, host_build_id); | |
1826 | ||
4e4b6c06 | 1827 | /* Try a fast path for /proc/kallsyms if possible */ |
0544d422 | 1828 | if (is_host) { |
0544d422 | 1829 | /* |
11870d71 MH |
1830 | * Do not check the build-id cache, unless we know we cannot use |
1831 | * /proc/kcore or module maps don't match to /proc/kallsyms. | |
1832 | * To check readability of /proc/kcore, do not use access(R_OK) | |
1833 | * since /proc/kcore requires CAP_SYS_RAWIO to read and access | |
1834 | * can't check it. | |
0544d422 | 1835 | */ |
11870d71 MH |
1836 | if (filename__readable("/proc/kcore") && |
1837 | !validate_kcore_addresses("/proc/kallsyms", map)) | |
1838 | goto proc_kallsyms; | |
0544d422 AH |
1839 | } |
1840 | ||
4e4b6c06 MH |
1841 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
1842 | ||
449867e3 | 1843 | /* Find kallsyms in build-id cache with kcore */ |
4e4b6c06 MH |
1844 | scnprintf(path, sizeof(path), "%s/%s/%s", |
1845 | buildid_dir, DSO__NAME_KCORE, sbuild_id); | |
1846 | ||
449867e3 AH |
1847 | if (!find_matching_kcore(map, path, sizeof(path))) |
1848 | return strdup(path); | |
1849 | ||
4e4b6c06 MH |
1850 | /* Use current /proc/kallsyms if possible */ |
1851 | if (is_host) { | |
1852 | proc_kallsyms: | |
1853 | return strdup("/proc/kallsyms"); | |
1854 | } | |
1855 | ||
1856 | /* Finally, find a cache of kallsyms */ | |
01412261 | 1857 | if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) { |
0544d422 AH |
1858 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", |
1859 | sbuild_id); | |
1860 | return NULL; | |
1861 | } | |
1862 | ||
1863 | return strdup(path); | |
0544d422 AH |
1864 | } |
1865 | ||
be39db9f | 1866 | static int dso__load_kernel_sym(struct dso *dso, struct map *map) |
a827c875 | 1867 | { |
cc612d81 | 1868 | int err; |
9e201442 ACM |
1869 | const char *kallsyms_filename = NULL; |
1870 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1871 | /* |
b226a5a7 DA |
1872 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1873 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1874 | * |
1875 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1876 | * build-id, or if the user specifies the wrong path to the right | |
1877 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1878 | * x86_86 one, on the machine where analysis is being performed, say), | |
1879 | * or worse, /proc/kallsyms. | |
1880 | * | |
1881 | * If the specified file _has_ a build-id and there is a build-id | |
1882 | * section in the perf.data file, we will still do the expected | |
1883 | * validation in dso__load_vmlinux and will bail out if they don't | |
1884 | * match. | |
1885 | */ | |
b226a5a7 DA |
1886 | if (symbol_conf.kallsyms_name != NULL) { |
1887 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1888 | goto do_kallsyms; | |
1889 | } | |
1890 | ||
fc2be696 | 1891 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
be39db9f | 1892 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false); |
dc8d6ab2 | 1893 | } |
cc612d81 | 1894 | |
fc2be696 | 1895 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
be39db9f | 1896 | err = dso__load_vmlinux_path(dso, map); |
a19afe46 | 1897 | if (err > 0) |
39b12f78 | 1898 | return err; |
cc612d81 ACM |
1899 | } |
1900 | ||
ec5761ea DA |
1901 | /* do not try local files if a symfs was given */ |
1902 | if (symbol_conf.symfs[0] != 0) | |
1903 | return -1; | |
1904 | ||
0544d422 AH |
1905 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1906 | if (!kallsyms_allocated_filename) | |
1907 | return -1; | |
19fc2ded | 1908 | |
0544d422 | 1909 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1910 | |
cc612d81 | 1911 | do_kallsyms: |
be39db9f | 1912 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
3846df2e ACM |
1913 | if (err > 0) |
1914 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1915 | free(kallsyms_allocated_filename); |
439d473b | 1916 | |
8e0cf965 | 1917 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1918 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 1919 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
1920 | map__fixup_start(map); |
1921 | map__fixup_end(map); | |
439d473b | 1922 | } |
94cb9e38 | 1923 | |
a827c875 ACM |
1924 | return err; |
1925 | } | |
1926 | ||
be39db9f | 1927 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map) |
a1645ce1 ZY |
1928 | { |
1929 | int err; | |
1930 | const char *kallsyms_filename = NULL; | |
23346f21 | 1931 | struct machine *machine; |
a1645ce1 ZY |
1932 | char path[PATH_MAX]; |
1933 | ||
1934 | if (!map->groups) { | |
1935 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1936 | return -1; | |
1937 | } | |
23346f21 | 1938 | machine = map->groups->machine; |
a1645ce1 | 1939 | |
23346f21 | 1940 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1941 | /* |
1942 | * if the user specified a vmlinux filename, use it and only | |
1943 | * it, reporting errors to the user if it cannot be used. | |
1944 | * Or use file guest_kallsyms inputted by user on commandline | |
1945 | */ | |
1946 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1947 | err = dso__load_vmlinux(dso, map, |
5230fb7d | 1948 | symbol_conf.default_guest_vmlinux_name, |
be39db9f | 1949 | false); |
39b12f78 | 1950 | return err; |
a1645ce1 ZY |
1951 | } |
1952 | ||
1953 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1954 | if (!kallsyms_filename) | |
1955 | return -1; | |
1956 | } else { | |
23346f21 | 1957 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1958 | kallsyms_filename = path; |
1959 | } | |
1960 | ||
be39db9f | 1961 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
8e0cf965 | 1962 | if (err > 0) |
39b12f78 | 1963 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1964 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1965 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
8c7f1bb3 | 1966 | dso__set_long_name(dso, machine->mmap_name, false); |
a1645ce1 ZY |
1967 | map__fixup_start(map); |
1968 | map__fixup_end(map); | |
1969 | } | |
1970 | ||
1971 | return err; | |
1972 | } | |
cd84c2ac | 1973 | |
cc612d81 ACM |
1974 | static void vmlinux_path__exit(void) |
1975 | { | |
04662523 ACM |
1976 | while (--vmlinux_path__nr_entries >= 0) |
1977 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 1978 | vmlinux_path__nr_entries = 0; |
cc612d81 | 1979 | |
04662523 | 1980 | zfree(&vmlinux_path); |
cc612d81 ACM |
1981 | } |
1982 | ||
aac48647 ET |
1983 | static const char * const vmlinux_paths[] = { |
1984 | "vmlinux", | |
1985 | "/boot/vmlinux" | |
1986 | }; | |
1987 | ||
1988 | static const char * const vmlinux_paths_upd[] = { | |
1989 | "/boot/vmlinux-%s", | |
1990 | "/usr/lib/debug/boot/vmlinux-%s", | |
1991 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
1992 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
1993 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
1994 | }; |
1995 | ||
1996 | static int vmlinux_path__add(const char *new_entry) | |
1997 | { | |
1998 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
1999 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2000 | return -1; | |
2001 | ++vmlinux_path__nr_entries; | |
2002 | ||
2003 | return 0; | |
2004 | } | |
2005 | ||
ce80d3be | 2006 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
2007 | { |
2008 | struct utsname uts; | |
2009 | char bf[PATH_MAX]; | |
0a7e6d1b | 2010 | char *kernel_version; |
aac48647 | 2011 | unsigned int i; |
cc612d81 | 2012 | |
aac48647 ET |
2013 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
2014 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
2015 | if (vmlinux_path == NULL) |
2016 | return -1; | |
2017 | ||
aac48647 ET |
2018 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
2019 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
2020 | goto out_fail; | |
ec5761ea | 2021 | |
0a7e6d1b | 2022 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
2023 | if (symbol_conf.symfs[0] != 0) |
2024 | return 0; | |
2025 | ||
0a7e6d1b NK |
2026 | if (env) { |
2027 | kernel_version = env->os_release; | |
2028 | } else { | |
2029 | if (uname(&uts) < 0) | |
2030 | goto out_fail; | |
2031 | ||
2032 | kernel_version = uts.release; | |
2033 | } | |
ec5761ea | 2034 | |
aac48647 ET |
2035 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
2036 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
2037 | if (vmlinux_path__add(bf) < 0) | |
2038 | goto out_fail; | |
2039 | } | |
cc612d81 ACM |
2040 | |
2041 | return 0; | |
2042 | ||
2043 | out_fail: | |
2044 | vmlinux_path__exit(); | |
2045 | return -1; | |
2046 | } | |
2047 | ||
3bfe5f81 | 2048 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
2049 | const char *list_name) |
2050 | { | |
2051 | if (list_str == NULL) | |
2052 | return 0; | |
2053 | ||
4a77e218 | 2054 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
2055 | if (!*list) { |
2056 | pr_err("problems parsing %s list\n", list_name); | |
2057 | return -1; | |
2058 | } | |
0bc2f2f7 ACM |
2059 | |
2060 | symbol_conf.has_filter = true; | |
655000e7 ACM |
2061 | return 0; |
2062 | } | |
2063 | ||
e03eaa40 DA |
2064 | int setup_intlist(struct intlist **list, const char *list_str, |
2065 | const char *list_name) | |
2066 | { | |
2067 | if (list_str == NULL) | |
2068 | return 0; | |
2069 | ||
2070 | *list = intlist__new(list_str); | |
2071 | if (!*list) { | |
2072 | pr_err("problems parsing %s list\n", list_name); | |
2073 | return -1; | |
2074 | } | |
2075 | return 0; | |
2076 | } | |
2077 | ||
ec80fde7 ACM |
2078 | static bool symbol__read_kptr_restrict(void) |
2079 | { | |
2080 | bool value = false; | |
38272dc4 | 2081 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); |
ec80fde7 | 2082 | |
38272dc4 WN |
2083 | if (fp != NULL) { |
2084 | char line[8]; | |
ec80fde7 | 2085 | |
38272dc4 | 2086 | if (fgets(line, sizeof(line), fp) != NULL) |
3dbe46c5 | 2087 | value = ((geteuid() != 0) || (getuid() != 0)) ? |
38272dc4 WN |
2088 | (atoi(line) != 0) : |
2089 | (atoi(line) == 2); | |
ec80fde7 | 2090 | |
38272dc4 | 2091 | fclose(fp); |
ec80fde7 ACM |
2092 | } |
2093 | ||
2094 | return value; | |
2095 | } | |
2096 | ||
b01141f4 ACM |
2097 | int symbol__annotation_init(void) |
2098 | { | |
7b366142 ACM |
2099 | if (symbol_conf.init_annotation) |
2100 | return 0; | |
2101 | ||
b01141f4 ACM |
2102 | if (symbol_conf.initialized) { |
2103 | pr_err("Annotation needs to be init before symbol__init()\n"); | |
2104 | return -1; | |
2105 | } | |
2106 | ||
b01141f4 ACM |
2107 | symbol_conf.priv_size += sizeof(struct annotation); |
2108 | symbol_conf.init_annotation = true; | |
2109 | return 0; | |
2110 | } | |
2111 | ||
ce80d3be | 2112 | int symbol__init(struct perf_env *env) |
2446042c | 2113 | { |
ec5761ea DA |
2114 | const char *symfs; |
2115 | ||
85e00b55 JZ |
2116 | if (symbol_conf.initialized) |
2117 | return 0; | |
2118 | ||
9ac3e487 | 2119 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 2120 | |
166ccc9c NK |
2121 | symbol__elf_init(); |
2122 | ||
75be6cf4 ACM |
2123 | if (symbol_conf.sort_by_name) |
2124 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2125 | sizeof(struct symbol)); | |
b32d133a | 2126 | |
0a7e6d1b | 2127 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
2128 | return -1; |
2129 | ||
c410a338 ACM |
2130 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2131 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2132 | return -1; | |
2133 | } | |
2134 | ||
655000e7 ACM |
2135 | if (setup_list(&symbol_conf.dso_list, |
2136 | symbol_conf.dso_list_str, "dso") < 0) | |
2137 | return -1; | |
2138 | ||
2139 | if (setup_list(&symbol_conf.comm_list, | |
2140 | symbol_conf.comm_list_str, "comm") < 0) | |
2141 | goto out_free_dso_list; | |
2142 | ||
e03eaa40 DA |
2143 | if (setup_intlist(&symbol_conf.pid_list, |
2144 | symbol_conf.pid_list_str, "pid") < 0) | |
2145 | goto out_free_comm_list; | |
2146 | ||
2147 | if (setup_intlist(&symbol_conf.tid_list, | |
2148 | symbol_conf.tid_list_str, "tid") < 0) | |
2149 | goto out_free_pid_list; | |
2150 | ||
655000e7 ACM |
2151 | if (setup_list(&symbol_conf.sym_list, |
2152 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2153 | goto out_free_tid_list; |
655000e7 | 2154 | |
64eff7d9 DA |
2155 | if (setup_list(&symbol_conf.bt_stop_list, |
2156 | symbol_conf.bt_stop_list_str, "symbol") < 0) | |
2157 | goto out_free_sym_list; | |
2158 | ||
ec5761ea DA |
2159 | /* |
2160 | * A path to symbols of "/" is identical to "" | |
2161 | * reset here for simplicity. | |
2162 | */ | |
2163 | symfs = realpath(symbol_conf.symfs, NULL); | |
2164 | if (symfs == NULL) | |
2165 | symfs = symbol_conf.symfs; | |
2166 | if (strcmp(symfs, "/") == 0) | |
2167 | symbol_conf.symfs = ""; | |
2168 | if (symfs != symbol_conf.symfs) | |
2169 | free((void *)symfs); | |
2170 | ||
ec80fde7 ACM |
2171 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2172 | ||
85e00b55 | 2173 | symbol_conf.initialized = true; |
4aa65636 | 2174 | return 0; |
655000e7 | 2175 | |
64eff7d9 DA |
2176 | out_free_sym_list: |
2177 | strlist__delete(symbol_conf.sym_list); | |
e03eaa40 DA |
2178 | out_free_tid_list: |
2179 | intlist__delete(symbol_conf.tid_list); | |
2180 | out_free_pid_list: | |
2181 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2182 | out_free_comm_list: |
2183 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2184 | out_free_dso_list: |
2185 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2186 | return -1; |
4aa65636 ACM |
2187 | } |
2188 | ||
d65a458b ACM |
2189 | void symbol__exit(void) |
2190 | { | |
85e00b55 JZ |
2191 | if (!symbol_conf.initialized) |
2192 | return; | |
64eff7d9 | 2193 | strlist__delete(symbol_conf.bt_stop_list); |
d65a458b ACM |
2194 | strlist__delete(symbol_conf.sym_list); |
2195 | strlist__delete(symbol_conf.dso_list); | |
2196 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2197 | intlist__delete(symbol_conf.tid_list); |
2198 | intlist__delete(symbol_conf.pid_list); | |
d65a458b ACM |
2199 | vmlinux_path__exit(); |
2200 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
64eff7d9 | 2201 | symbol_conf.bt_stop_list = NULL; |
85e00b55 | 2202 | symbol_conf.initialized = false; |
d65a458b | 2203 | } |
a7066709 HK |
2204 | |
2205 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2206 | const char *dir, int unset __maybe_unused) | |
2207 | { | |
2208 | char *bf = NULL; | |
2209 | int ret; | |
2210 | ||
2211 | symbol_conf.symfs = strdup(dir); | |
2212 | if (symbol_conf.symfs == NULL) | |
2213 | return -ENOMEM; | |
2214 | ||
2215 | /* skip the locally configured cache if a symfs is given, and | |
2216 | * config buildid dir to symfs/.debug | |
2217 | */ | |
2218 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2219 | if (ret < 0) | |
2220 | return -ENOMEM; | |
2221 | ||
2222 | set_buildid_dir(bf); | |
2223 | ||
2224 | free(bf); | |
2225 | return 0; | |
2226 | } | |
9f87498f JO |
2227 | |
2228 | struct mem_info *mem_info__get(struct mem_info *mi) | |
2229 | { | |
2230 | if (mi) | |
2231 | refcount_inc(&mi->refcnt); | |
2232 | return mi; | |
2233 | } | |
2234 | ||
2235 | void mem_info__put(struct mem_info *mi) | |
2236 | { | |
2237 | if (mi && refcount_dec_and_test(&mi->refcnt)) | |
2238 | free(mi); | |
2239 | } | |
2240 | ||
2241 | struct mem_info *mem_info__new(void) | |
2242 | { | |
2243 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
2244 | ||
2245 | if (mi) | |
2246 | refcount_set(&mi->refcnt, 1); | |
2247 | return mi; | |
2248 | } |