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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> | |
8859aede | 7 | #include <linux/capability.h> |
877a7a11 | 8 | #include <linux/kernel.h> |
e9814df8 | 9 | #include <linux/mman.h> |
8520a98d | 10 | #include <linux/string.h> |
2a1292cb | 11 | #include <linux/time64.h> |
5aab621b ACM |
12 | #include <sys/types.h> |
13 | #include <sys/stat.h> | |
14 | #include <sys/param.h> | |
15 | #include <fcntl.h> | |
16 | #include <unistd.h> | |
9486aa38 | 17 | #include <inttypes.h> |
b01141f4 | 18 | #include "annotate.h" |
b36f19d5 | 19 | #include "build-id.h" |
8859aede | 20 | #include "cap.h" |
fac583fd | 21 | #include "dso.h" |
fb71c86c | 22 | #include "util.h" // lsdir() |
8a6c5b26 | 23 | #include "debug.h" |
8859aede | 24 | #include "event.h" |
69d2591a | 25 | #include "machine.h" |
1101f69a | 26 | #include "map.h" |
a2928c42 | 27 | #include "symbol.h" |
d3300a3c ACM |
28 | #include "map_symbol.h" |
29 | #include "mem-events.h" | |
b1d1b094 | 30 | #include "symsrc.h" |
5aab621b | 31 | #include "strlist.h" |
e03eaa40 | 32 | #include "intlist.h" |
843ff37b | 33 | #include "namespaces.h" |
0a7e6d1b | 34 | #include "header.h" |
9a3993d4 | 35 | #include "path.h" |
3052ba56 | 36 | #include <linux/ctype.h> |
7f7c536f | 37 | #include <linux/zalloc.h> |
a2928c42 | 38 | |
a2928c42 | 39 | #include <elf.h> |
f1617b40 | 40 | #include <limits.h> |
c506c96b | 41 | #include <symbol/kallsyms.h> |
439d473b | 42 | #include <sys/utsname.h> |
2cdbc46d | 43 | |
be39db9f ACM |
44 | static int dso__load_kernel_sym(struct dso *dso, struct map *map); |
45 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map); | |
608c34de ACM |
46 | static bool symbol__is_idle(const char *name); |
47 | ||
3f067dca ACM |
48 | int vmlinux_path__nr_entries; |
49 | char **vmlinux_path; | |
439d473b | 50 | |
75be6cf4 | 51 | struct symbol_conf symbol_conf = { |
52bab886 | 52 | .nanosecs = false, |
e511db5e NK |
53 | .use_modules = true, |
54 | .try_vmlinux_path = true, | |
e511db5e | 55 | .demangle = true, |
763122ad | 56 | .demangle_kernel = false, |
e511db5e | 57 | .cumulate_callchain = true, |
2a1292cb | 58 | .time_quantum = 100 * NSEC_PER_MSEC, /* 100ms */ |
c8302367 | 59 | .show_hist_headers = true, |
e511db5e | 60 | .symfs = "", |
1e9abf8b | 61 | .event_group = true, |
d8a88dd2 | 62 | .inline_name = true, |
4968ac8f | 63 | .res_sample = 0, |
b32d133a ACM |
64 | }; |
65 | ||
44f24cb3 JO |
66 | static enum dso_binary_type binary_type_symtab[] = { |
67 | DSO_BINARY_TYPE__KALLSYMS, | |
68 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
69 | DSO_BINARY_TYPE__JAVA_JIT, | |
70 | DSO_BINARY_TYPE__DEBUGLINK, | |
71 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
d2396999 | 72 | DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO, |
44f24cb3 JO |
73 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
74 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
75 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
76 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
77 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
c00c48fc | 78 | DSO_BINARY_TYPE__GUEST_KMODULE_COMP, |
44f24cb3 | 79 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, |
c00c48fc | 80 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP, |
9cd00941 | 81 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
85afd355 | 82 | DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO, |
44f24cb3 JO |
83 | DSO_BINARY_TYPE__NOT_FOUND, |
84 | }; | |
85 | ||
028df767 | 86 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 87 | |
3183f8ca | 88 | static bool symbol_type__filter(char symbol_type) |
6893d4ee | 89 | { |
31877908 | 90 | symbol_type = toupper(symbol_type); |
2be732c0 | 91 | return symbol_type == 'T' || symbol_type == 'W' || symbol_type == 'D' || symbol_type == 'B'; |
6893d4ee ACM |
92 | } |
93 | ||
694bf407 AB |
94 | static int prefix_underscores_count(const char *str) |
95 | { | |
96 | const char *tail = str; | |
97 | ||
98 | while (*tail == '_') | |
99 | tail++; | |
100 | ||
101 | return tail - str; | |
102 | } | |
103 | ||
b9c0a649 TR |
104 | void __weak arch__symbols__fixup_end(struct symbol *p, struct symbol *c) |
105 | { | |
106 | p->end = c->start; | |
107 | } | |
108 | ||
4b3a2716 MH |
109 | const char * __weak arch__normalize_symbol_name(const char *name) |
110 | { | |
111 | return name; | |
112 | } | |
113 | ||
d8040645 PC |
114 | int __weak arch__compare_symbol_names(const char *namea, const char *nameb) |
115 | { | |
116 | return strcmp(namea, nameb); | |
117 | } | |
118 | ||
119 | int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb, | |
120 | unsigned int n) | |
121 | { | |
122 | return strncmp(namea, nameb, n); | |
123 | } | |
124 | ||
fb6d5942 NR |
125 | int __weak arch__choose_best_symbol(struct symbol *syma, |
126 | struct symbol *symb __maybe_unused) | |
127 | { | |
128 | /* Avoid "SyS" kernel syscall aliases */ | |
129 | if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) | |
130 | return SYMBOL_B; | |
131 | if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
132 | return SYMBOL_B; | |
133 | ||
134 | return SYMBOL_A; | |
135 | } | |
694bf407 AB |
136 | |
137 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
138 | { | |
139 | s64 a; | |
140 | s64 b; | |
3445432b | 141 | size_t na, nb; |
694bf407 AB |
142 | |
143 | /* Prefer a symbol with non zero length */ | |
144 | a = syma->end - syma->start; | |
145 | b = symb->end - symb->start; | |
146 | if ((b == 0) && (a > 0)) | |
147 | return SYMBOL_A; | |
148 | else if ((a == 0) && (b > 0)) | |
149 | return SYMBOL_B; | |
150 | ||
151 | /* Prefer a non weak symbol over a weak one */ | |
152 | a = syma->binding == STB_WEAK; | |
153 | b = symb->binding == STB_WEAK; | |
154 | if (b && !a) | |
155 | return SYMBOL_A; | |
156 | if (a && !b) | |
157 | return SYMBOL_B; | |
158 | ||
159 | /* Prefer a global symbol over a non global one */ | |
160 | a = syma->binding == STB_GLOBAL; | |
161 | b = symb->binding == STB_GLOBAL; | |
162 | if (a && !b) | |
163 | return SYMBOL_A; | |
164 | if (b && !a) | |
165 | return SYMBOL_B; | |
166 | ||
167 | /* Prefer a symbol with less underscores */ | |
168 | a = prefix_underscores_count(syma->name); | |
169 | b = prefix_underscores_count(symb->name); | |
170 | if (b > a) | |
171 | return SYMBOL_A; | |
172 | else if (a > b) | |
173 | return SYMBOL_B; | |
174 | ||
3445432b AH |
175 | /* Choose the symbol with the longest name */ |
176 | na = strlen(syma->name); | |
177 | nb = strlen(symb->name); | |
178 | if (na > nb) | |
694bf407 | 179 | return SYMBOL_A; |
3445432b | 180 | else if (na < nb) |
694bf407 | 181 | return SYMBOL_B; |
3445432b | 182 | |
fb6d5942 | 183 | return arch__choose_best_symbol(syma, symb); |
694bf407 AB |
184 | } |
185 | ||
7137ff50 | 186 | void symbols__fixup_duplicate(struct rb_root_cached *symbols) |
694bf407 AB |
187 | { |
188 | struct rb_node *nd; | |
189 | struct symbol *curr, *next; | |
190 | ||
c97b40e4 ACM |
191 | if (symbol_conf.allow_aliases) |
192 | return; | |
193 | ||
7137ff50 | 194 | nd = rb_first_cached(symbols); |
694bf407 AB |
195 | |
196 | while (nd) { | |
197 | curr = rb_entry(nd, struct symbol, rb_node); | |
198 | again: | |
199 | nd = rb_next(&curr->rb_node); | |
200 | next = rb_entry(nd, struct symbol, rb_node); | |
201 | ||
202 | if (!nd) | |
203 | break; | |
204 | ||
205 | if (curr->start != next->start) | |
206 | continue; | |
207 | ||
208 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
7137ff50 | 209 | rb_erase_cached(&next->rb_node, symbols); |
d4f74eb8 | 210 | symbol__delete(next); |
694bf407 AB |
211 | goto again; |
212 | } else { | |
213 | nd = rb_next(&curr->rb_node); | |
7137ff50 | 214 | rb_erase_cached(&curr->rb_node, symbols); |
d4f74eb8 | 215 | symbol__delete(curr); |
694bf407 AB |
216 | } |
217 | } | |
218 | } | |
219 | ||
7137ff50 | 220 | void symbols__fixup_end(struct rb_root_cached *symbols) |
af427bf5 | 221 | { |
7137ff50 | 222 | struct rb_node *nd, *prevnd = rb_first_cached(symbols); |
2e538c4a | 223 | struct symbol *curr, *prev; |
af427bf5 ACM |
224 | |
225 | if (prevnd == NULL) | |
226 | return; | |
227 | ||
2e538c4a ACM |
228 | curr = rb_entry(prevnd, struct symbol, rb_node); |
229 | ||
af427bf5 | 230 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
231 | prev = curr; |
232 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 233 | |
3b01a413 | 234 | if (prev->end == prev->start && prev->end != curr->start) |
b9c0a649 | 235 | arch__symbols__fixup_end(prev, curr); |
af427bf5 | 236 | } |
2e538c4a ACM |
237 | |
238 | /* Last entry */ | |
239 | if (curr->end == curr->start) | |
e7ede72a | 240 | curr->end = roundup(curr->start, 4096) + 4096; |
af427bf5 ACM |
241 | } |
242 | ||
9a29ceee | 243 | void maps__fixup_end(struct maps *maps) |
af427bf5 | 244 | { |
8efc4f05 | 245 | struct map *prev = NULL, *curr; |
af427bf5 | 246 | |
0a7c74ea | 247 | down_write(&maps->lock); |
6a2ffcdd | 248 | |
8efc4f05 ACM |
249 | maps__for_each_entry(maps, curr) { |
250 | if (prev != NULL && !prev->end) | |
251 | prev->end = curr->start; | |
af427bf5 | 252 | |
8efc4f05 | 253 | prev = curr; |
2e538c4a | 254 | } |
90c83218 ACM |
255 | |
256 | /* | |
257 | * We still haven't the actual symbols, so guess the | |
258 | * last map final address. | |
259 | */ | |
8efc4f05 | 260 | if (curr && !curr->end) |
9ad4652b | 261 | curr->end = ~0ULL; |
6a2ffcdd | 262 | |
0a7c74ea | 263 | up_write(&maps->lock); |
af427bf5 ACM |
264 | } |
265 | ||
af30bffa | 266 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name) |
a2928c42 | 267 | { |
0085c954 | 268 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
269 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
270 | sizeof(*sym) + namelen)); | |
271 | if (sym == NULL) | |
0b73da3f IM |
272 | return NULL; |
273 | ||
b01141f4 ACM |
274 | if (symbol_conf.priv_size) { |
275 | if (symbol_conf.init_annotation) { | |
276 | struct annotation *notes = (void *)sym; | |
4f74f187 | 277 | annotation__init(notes); |
b01141f4 | 278 | } |
aeafcbaf | 279 | sym = ((void *)sym) + symbol_conf.priv_size; |
b01141f4 | 280 | } |
e4204992 | 281 | |
aeafcbaf | 282 | sym->start = start; |
2c241bd3 | 283 | sym->end = len ? start + len : start; |
af30bffa | 284 | sym->type = type; |
aeafcbaf ACM |
285 | sym->binding = binding; |
286 | sym->namelen = namelen - 1; | |
e4204992 | 287 | |
aeafcbaf ACM |
288 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
289 | __func__, name, start, sym->end); | |
290 | memcpy(sym->name, name, namelen); | |
a2928c42 | 291 | |
aeafcbaf | 292 | return sym; |
a2928c42 ACM |
293 | } |
294 | ||
aeafcbaf | 295 | void symbol__delete(struct symbol *sym) |
a2928c42 | 296 | { |
4f74f187 IR |
297 | if (symbol_conf.priv_size) { |
298 | if (symbol_conf.init_annotation) { | |
299 | struct annotation *notes = symbol__annotation(sym); | |
300 | ||
301 | annotation__exit(notes); | |
302 | } | |
303 | } | |
aeafcbaf | 304 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
305 | } |
306 | ||
7137ff50 | 307 | void symbols__delete(struct rb_root_cached *symbols) |
a2928c42 ACM |
308 | { |
309 | struct symbol *pos; | |
7137ff50 | 310 | struct rb_node *next = rb_first_cached(symbols); |
a2928c42 ACM |
311 | |
312 | while (next) { | |
313 | pos = rb_entry(next, struct symbol, rb_node); | |
314 | next = rb_next(&pos->rb_node); | |
7137ff50 | 315 | rb_erase_cached(&pos->rb_node, symbols); |
00a192b3 | 316 | symbol__delete(pos); |
a2928c42 ACM |
317 | } |
318 | } | |
319 | ||
7137ff50 DB |
320 | void __symbols__insert(struct rb_root_cached *symbols, |
321 | struct symbol *sym, bool kernel) | |
a2928c42 | 322 | { |
7137ff50 | 323 | struct rb_node **p = &symbols->rb_root.rb_node; |
a2928c42 | 324 | struct rb_node *parent = NULL; |
9cffa8d5 | 325 | const u64 ip = sym->start; |
a2928c42 | 326 | struct symbol *s; |
7137ff50 | 327 | bool leftmost = true; |
a2928c42 | 328 | |
608c34de ACM |
329 | if (kernel) { |
330 | const char *name = sym->name; | |
331 | /* | |
332 | * ppc64 uses function descriptors and appends a '.' to the | |
333 | * start of every instruction address. Remove it. | |
334 | */ | |
335 | if (name[0] == '.') | |
336 | name++; | |
337 | sym->idle = symbol__is_idle(name); | |
338 | } | |
339 | ||
a2928c42 ACM |
340 | while (*p != NULL) { |
341 | parent = *p; | |
342 | s = rb_entry(parent, struct symbol, rb_node); | |
343 | if (ip < s->start) | |
344 | p = &(*p)->rb_left; | |
7137ff50 | 345 | else { |
a2928c42 | 346 | p = &(*p)->rb_right; |
7137ff50 DB |
347 | leftmost = false; |
348 | } | |
a2928c42 ACM |
349 | } |
350 | rb_link_node(&sym->rb_node, parent, p); | |
7137ff50 | 351 | rb_insert_color_cached(&sym->rb_node, symbols, leftmost); |
a2928c42 ACM |
352 | } |
353 | ||
7137ff50 | 354 | void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym) |
608c34de ACM |
355 | { |
356 | __symbols__insert(symbols, sym, false); | |
357 | } | |
358 | ||
7137ff50 | 359 | static struct symbol *symbols__find(struct rb_root_cached *symbols, u64 ip) |
a2928c42 ACM |
360 | { |
361 | struct rb_node *n; | |
362 | ||
aeafcbaf | 363 | if (symbols == NULL) |
a2928c42 ACM |
364 | return NULL; |
365 | ||
7137ff50 | 366 | n = symbols->rb_root.rb_node; |
a2928c42 ACM |
367 | |
368 | while (n) { | |
369 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
370 | ||
371 | if (ip < s->start) | |
372 | n = n->rb_left; | |
9c7b37cd | 373 | else if (ip > s->end || (ip == s->end && ip != s->start)) |
a2928c42 ACM |
374 | n = n->rb_right; |
375 | else | |
376 | return s; | |
377 | } | |
378 | ||
379 | return NULL; | |
380 | } | |
381 | ||
7137ff50 | 382 | static struct symbol *symbols__first(struct rb_root_cached *symbols) |
8e0cf965 | 383 | { |
7137ff50 | 384 | struct rb_node *n = rb_first_cached(symbols); |
8e0cf965 AH |
385 | |
386 | if (n) | |
387 | return rb_entry(n, struct symbol, rb_node); | |
388 | ||
389 | return NULL; | |
390 | } | |
391 | ||
7137ff50 | 392 | static struct symbol *symbols__last(struct rb_root_cached *symbols) |
cd67f99f | 393 | { |
7137ff50 | 394 | struct rb_node *n = rb_last(&symbols->rb_root); |
cd67f99f AH |
395 | |
396 | if (n) | |
397 | return rb_entry(n, struct symbol, rb_node); | |
398 | ||
399 | return NULL; | |
400 | } | |
401 | ||
9c00a81b AH |
402 | static struct symbol *symbols__next(struct symbol *sym) |
403 | { | |
404 | struct rb_node *n = rb_next(&sym->rb_node); | |
405 | ||
406 | if (n) | |
407 | return rb_entry(n, struct symbol, rb_node); | |
408 | ||
409 | return NULL; | |
410 | } | |
411 | ||
7137ff50 | 412 | static void symbols__insert_by_name(struct rb_root_cached *symbols, struct symbol *sym) |
79406cd7 | 413 | { |
7137ff50 | 414 | struct rb_node **p = &symbols->rb_root.rb_node; |
79406cd7 | 415 | struct rb_node *parent = NULL; |
02a9d037 | 416 | struct symbol_name_rb_node *symn, *s; |
7137ff50 | 417 | bool leftmost = true; |
02a9d037 RV |
418 | |
419 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
420 | |
421 | while (*p != NULL) { | |
422 | parent = *p; | |
423 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
424 | if (strcmp(sym->name, s->sym.name) < 0) | |
425 | p = &(*p)->rb_left; | |
7137ff50 | 426 | else { |
79406cd7 | 427 | p = &(*p)->rb_right; |
7137ff50 DB |
428 | leftmost = false; |
429 | } | |
79406cd7 ACM |
430 | } |
431 | rb_link_node(&symn->rb_node, parent, p); | |
7137ff50 | 432 | rb_insert_color_cached(&symn->rb_node, symbols, leftmost); |
79406cd7 ACM |
433 | } |
434 | ||
7137ff50 DB |
435 | static void symbols__sort_by_name(struct rb_root_cached *symbols, |
436 | struct rb_root_cached *source) | |
79406cd7 ACM |
437 | { |
438 | struct rb_node *nd; | |
439 | ||
7137ff50 | 440 | for (nd = rb_first_cached(source); nd; nd = rb_next(nd)) { |
79406cd7 | 441 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
aeafcbaf | 442 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
443 | } |
444 | } | |
445 | ||
d8040645 PC |
446 | int symbol__match_symbol_name(const char *name, const char *str, |
447 | enum symbol_tag_include includes) | |
448 | { | |
449 | const char *versioning; | |
450 | ||
451 | if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY && | |
452 | (versioning = strstr(name, "@@"))) { | |
453 | int len = strlen(str); | |
454 | ||
455 | if (len < versioning - name) | |
456 | len = versioning - name; | |
457 | ||
458 | return arch__compare_symbol_names_n(name, str, len); | |
459 | } else | |
460 | return arch__compare_symbol_names(name, str); | |
461 | } | |
462 | ||
7137ff50 | 463 | static struct symbol *symbols__find_by_name(struct rb_root_cached *symbols, |
d8040645 PC |
464 | const char *name, |
465 | enum symbol_tag_include includes) | |
79406cd7 ACM |
466 | { |
467 | struct rb_node *n; | |
5bcaaca3 | 468 | struct symbol_name_rb_node *s = NULL; |
79406cd7 | 469 | |
aeafcbaf | 470 | if (symbols == NULL) |
79406cd7 ACM |
471 | return NULL; |
472 | ||
7137ff50 | 473 | n = symbols->rb_root.rb_node; |
79406cd7 ACM |
474 | |
475 | while (n) { | |
79406cd7 ACM |
476 | int cmp; |
477 | ||
478 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
d8040645 | 479 | cmp = symbol__match_symbol_name(s->sym.name, name, includes); |
79406cd7 | 480 | |
d8040645 | 481 | if (cmp > 0) |
79406cd7 | 482 | n = n->rb_left; |
d8040645 | 483 | else if (cmp < 0) |
79406cd7 ACM |
484 | n = n->rb_right; |
485 | else | |
de480999 | 486 | break; |
79406cd7 ACM |
487 | } |
488 | ||
de480999 NK |
489 | if (n == NULL) |
490 | return NULL; | |
491 | ||
d8040645 PC |
492 | if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY) |
493 | /* return first symbol that has same name (if any) */ | |
494 | for (n = rb_prev(n); n; n = rb_prev(n)) { | |
495 | struct symbol_name_rb_node *tmp; | |
de480999 | 496 | |
d8040645 PC |
497 | tmp = rb_entry(n, struct symbol_name_rb_node, rb_node); |
498 | if (arch__compare_symbol_names(tmp->sym.name, s->sym.name)) | |
499 | break; | |
de480999 | 500 | |
d8040645 PC |
501 | s = tmp; |
502 | } | |
de480999 NK |
503 | |
504 | return &s->sym; | |
79406cd7 ACM |
505 | } |
506 | ||
c0b4dffb ACM |
507 | void dso__reset_find_symbol_cache(struct dso *dso) |
508 | { | |
3183f8ca ACM |
509 | dso->last_find_result.addr = 0; |
510 | dso->last_find_result.symbol = NULL; | |
c0b4dffb ACM |
511 | } |
512 | ||
3183f8ca | 513 | void dso__insert_symbol(struct dso *dso, struct symbol *sym) |
ae93a6c7 | 514 | { |
3183f8ca | 515 | __symbols__insert(&dso->symbols, sym, dso->kernel); |
ae93a6c7 CP |
516 | |
517 | /* update the symbol cache if necessary */ | |
3183f8ca ACM |
518 | if (dso->last_find_result.addr >= sym->start && |
519 | (dso->last_find_result.addr < sym->end || | |
ae93a6c7 | 520 | sym->start == sym->end)) { |
3183f8ca | 521 | dso->last_find_result.symbol = sym; |
ae93a6c7 CP |
522 | } |
523 | } | |
524 | ||
ab8bf5f2 TR |
525 | void dso__delete_symbol(struct dso *dso, struct symbol *sym) |
526 | { | |
527 | rb_erase_cached(&sym->rb_node, &dso->symbols); | |
528 | symbol__delete(sym); | |
529 | dso__reset_find_symbol_cache(dso); | |
530 | } | |
531 | ||
3183f8ca | 532 | struct symbol *dso__find_symbol(struct dso *dso, u64 addr) |
fcf1203a | 533 | { |
3183f8ca ACM |
534 | if (dso->last_find_result.addr != addr || dso->last_find_result.symbol == NULL) { |
535 | dso->last_find_result.addr = addr; | |
536 | dso->last_find_result.symbol = symbols__find(&dso->symbols, addr); | |
b685ac22 ACM |
537 | } |
538 | ||
3183f8ca | 539 | return dso->last_find_result.symbol; |
9c00a81b AH |
540 | } |
541 | ||
5cf88a63 ACM |
542 | struct symbol *dso__first_symbol(struct dso *dso) |
543 | { | |
3183f8ca | 544 | return symbols__first(&dso->symbols); |
cd67f99f AH |
545 | } |
546 | ||
5cf88a63 ACM |
547 | struct symbol *dso__last_symbol(struct dso *dso) |
548 | { | |
3183f8ca | 549 | return symbols__last(&dso->symbols); |
5cf88a63 ACM |
550 | } |
551 | ||
9c00a81b AH |
552 | struct symbol *dso__next_symbol(struct symbol *sym) |
553 | { | |
554 | return symbols__next(sym); | |
8e0cf965 AH |
555 | } |
556 | ||
18bd7264 ACM |
557 | struct symbol *symbol__next_by_name(struct symbol *sym) |
558 | { | |
559 | struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym); | |
560 | struct rb_node *n = rb_next(&s->rb_node); | |
561 | ||
562 | return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL; | |
563 | } | |
564 | ||
565 | /* | |
af07eeb0 | 566 | * Returns first symbol that matched with @name. |
18bd7264 | 567 | */ |
3183f8ca | 568 | struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name) |
79406cd7 | 569 | { |
3183f8ca | 570 | struct symbol *s = symbols__find_by_name(&dso->symbol_names, name, |
d8040645 PC |
571 | SYMBOL_TAG_INCLUDE__NONE); |
572 | if (!s) | |
3183f8ca | 573 | s = symbols__find_by_name(&dso->symbol_names, name, |
d8040645 PC |
574 | SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); |
575 | return s; | |
79406cd7 ACM |
576 | } |
577 | ||
3183f8ca | 578 | void dso__sort_by_name(struct dso *dso) |
79406cd7 | 579 | { |
3183f8ca ACM |
580 | dso__set_sorted_by_name(dso); |
581 | return symbols__sort_by_name(&dso->symbol_names, &dso->symbols); | |
79406cd7 ACM |
582 | } |
583 | ||
32add10f IR |
584 | /* |
585 | * While we find nice hex chars, build a long_val. | |
586 | * Return number of chars processed. | |
587 | */ | |
588 | static int hex2u64(const char *ptr, u64 *long_val) | |
589 | { | |
590 | char *p; | |
591 | ||
592 | *long_val = strtoull(ptr, &p, 16); | |
593 | ||
594 | return p - ptr; | |
595 | } | |
596 | ||
597 | ||
316d70d6 AH |
598 | int modules__parse(const char *filename, void *arg, |
599 | int (*process_module)(void *arg, const char *name, | |
9ad4652b | 600 | u64 start, u64 size)) |
316d70d6 AH |
601 | { |
602 | char *line = NULL; | |
603 | size_t n; | |
604 | FILE *file; | |
605 | int err = 0; | |
606 | ||
607 | file = fopen(filename, "r"); | |
608 | if (file == NULL) | |
609 | return -1; | |
610 | ||
611 | while (1) { | |
612 | char name[PATH_MAX]; | |
9ad4652b TR |
613 | u64 start, size; |
614 | char *sep, *endptr; | |
316d70d6 AH |
615 | ssize_t line_len; |
616 | ||
617 | line_len = getline(&line, &n, file); | |
618 | if (line_len < 0) { | |
619 | if (feof(file)) | |
620 | break; | |
621 | err = -1; | |
622 | goto out; | |
623 | } | |
624 | ||
625 | if (!line) { | |
626 | err = -1; | |
627 | goto out; | |
628 | } | |
629 | ||
630 | line[--line_len] = '\0'; /* \n */ | |
631 | ||
632 | sep = strrchr(line, 'x'); | |
633 | if (sep == NULL) | |
634 | continue; | |
635 | ||
636 | hex2u64(sep + 1, &start); | |
637 | ||
638 | sep = strchr(line, ' '); | |
639 | if (sep == NULL) | |
640 | continue; | |
641 | ||
642 | *sep = '\0'; | |
643 | ||
644 | scnprintf(name, sizeof(name), "[%s]", line); | |
645 | ||
9ad4652b TR |
646 | size = strtoul(sep + 1, &endptr, 0); |
647 | if (*endptr != ' ' && *endptr != '\t') | |
648 | continue; | |
649 | ||
650 | err = process_module(arg, name, start, size); | |
316d70d6 AH |
651 | if (err) |
652 | break; | |
653 | } | |
654 | out: | |
655 | free(line); | |
656 | fclose(file); | |
657 | return err; | |
658 | } | |
659 | ||
e7110b9f ACM |
660 | /* |
661 | * These are symbols in the kernel image, so make sure that | |
662 | * sym is from a kernel DSO. | |
663 | */ | |
608c34de | 664 | static bool symbol__is_idle(const char *name) |
82d1deb0 DA |
665 | { |
666 | const char * const idle_symbols[] = { | |
0e71459a KP |
667 | "acpi_idle_do_entry", |
668 | "acpi_processor_ffh_cstate_enter", | |
549aff77 | 669 | "arch_cpu_idle", |
82d1deb0 | 670 | "cpu_idle", |
e0336ed6 | 671 | "cpu_startup_entry", |
0e71459a | 672 | "idle_cpu", |
82d1deb0 DA |
673 | "intel_idle", |
674 | "default_idle", | |
675 | "native_safe_halt", | |
676 | "enter_idle", | |
677 | "exit_idle", | |
678 | "mwait_idle", | |
679 | "mwait_idle_with_hints", | |
783abbd4 | 680 | "mwait_idle_with_hints.constprop.0", |
82d1deb0 DA |
681 | "poll_idle", |
682 | "ppc64_runlatch_off", | |
683 | "pseries_dedicated_idle_sleep", | |
19bf119c SS |
684 | "psw_idle", |
685 | "psw_idle_exit", | |
82d1deb0 DA |
686 | NULL |
687 | }; | |
82d1deb0 | 688 | int i; |
bc5f15be | 689 | static struct strlist *idle_symbols_list; |
82d1deb0 | 690 | |
bc5f15be KP |
691 | if (idle_symbols_list) |
692 | return strlist__has_entry(idle_symbols_list, name); | |
693 | ||
694 | idle_symbols_list = strlist__new(NULL, NULL); | |
695 | ||
696 | for (i = 0; idle_symbols[i]; i++) | |
697 | strlist__add(idle_symbols_list, idle_symbols[i]); | |
82d1deb0 | 698 | |
bc5f15be | 699 | return strlist__has_entry(idle_symbols_list, name); |
82d1deb0 DA |
700 | } |
701 | ||
682b335a | 702 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 703 | char type, u64 start) |
682b335a ACM |
704 | { |
705 | struct symbol *sym; | |
333cc76c | 706 | struct dso *dso = arg; |
7137ff50 | 707 | struct rb_root_cached *root = &dso->symbols; |
682b335a | 708 | |
3183f8ca | 709 | if (!symbol_type__filter(type)) |
682b335a ACM |
710 | return 0; |
711 | ||
1a86f4ba LS |
712 | /* Ignore local symbols for ARM modules */ |
713 | if (name[0] == '$') | |
714 | return 0; | |
715 | ||
82151520 CS |
716 | /* |
717 | * module symbols are not sorted so we add all | |
718 | * symbols, setting length to 0, and rely on | |
719 | * symbols__fixup_end() to fix it up. | |
720 | */ | |
af30bffa | 721 | sym = symbol__new(start, 0, kallsyms2elf_binding(type), kallsyms2elf_type(type), name); |
682b335a ACM |
722 | if (sym == NULL) |
723 | return -ENOMEM; | |
724 | /* | |
725 | * We will pass the symbols to the filter later, in | |
726 | * map__split_kallsyms, when we have split the maps per module | |
727 | */ | |
608c34de | 728 | __symbols__insert(root, sym, !strchr(name, '[')); |
a1645ce1 | 729 | |
682b335a ACM |
730 | return 0; |
731 | } | |
732 | ||
733 | /* | |
734 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
735 | * so that we can in the next step set the symbol ->end address and then | |
736 | * call kernel_maps__split_kallsyms. | |
737 | */ | |
333cc76c | 738 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename) |
682b335a | 739 | { |
333cc76c | 740 | return kallsyms__parse(filename, dso, map__process_kallsym_symbol); |
682b335a ACM |
741 | } |
742 | ||
79b6bb73 | 743 | static int maps__split_kallsyms_for_kcore(struct maps *kmaps, struct dso *dso) |
8e0cf965 | 744 | { |
8e0cf965 AH |
745 | struct map *curr_map; |
746 | struct symbol *pos; | |
866548dd | 747 | int count = 0; |
7137ff50 DB |
748 | struct rb_root_cached old_root = dso->symbols; |
749 | struct rb_root_cached *root = &dso->symbols; | |
750 | struct rb_node *next = rb_first_cached(root); | |
8e0cf965 | 751 | |
ba92732e WN |
752 | if (!kmaps) |
753 | return -1; | |
754 | ||
7137ff50 | 755 | *root = RB_ROOT_CACHED; |
866548dd | 756 | |
8e0cf965 AH |
757 | while (next) { |
758 | char *module; | |
759 | ||
760 | pos = rb_entry(next, struct symbol, rb_node); | |
761 | next = rb_next(&pos->rb_node); | |
762 | ||
7137ff50 DB |
763 | rb_erase_cached(&pos->rb_node, &old_root); |
764 | RB_CLEAR_NODE(&pos->rb_node); | |
8e0cf965 AH |
765 | module = strchr(pos->name, '\t'); |
766 | if (module) | |
767 | *module = '\0'; | |
768 | ||
79b6bb73 | 769 | curr_map = maps__find(kmaps, pos->start); |
8e0cf965 | 770 | |
be39db9f | 771 | if (!curr_map) { |
8e0cf965 | 772 | symbol__delete(pos); |
866548dd | 773 | continue; |
8e0cf965 | 774 | } |
866548dd AH |
775 | |
776 | pos->start -= curr_map->start - curr_map->pgoff; | |
d6d45745 AH |
777 | if (pos->end > curr_map->end) |
778 | pos->end = curr_map->end; | |
866548dd AH |
779 | if (pos->end) |
780 | pos->end -= curr_map->start - curr_map->pgoff; | |
3183f8ca | 781 | symbols__insert(&curr_map->dso->symbols, pos); |
866548dd | 782 | ++count; |
8e0cf965 AH |
783 | } |
784 | ||
785 | /* Symbols have been adjusted */ | |
786 | dso->adjust_symbols = 1; | |
787 | ||
866548dd | 788 | return count; |
8e0cf965 AH |
789 | } |
790 | ||
2e538c4a ACM |
791 | /* |
792 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
793 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
794 | * the original ELF section names vmlinux have. | |
795 | */ | |
79b6bb73 ACM |
796 | static int maps__split_kallsyms(struct maps *kmaps, struct dso *dso, u64 delta, |
797 | struct map *initial_map) | |
2e538c4a | 798 | { |
ba92732e | 799 | struct machine *machine; |
15e0e2d4 | 800 | struct map *curr_map = initial_map; |
2e538c4a | 801 | struct symbol *pos; |
48000a1a | 802 | int count = 0, moved = 0; |
7137ff50 DB |
803 | struct rb_root_cached *root = &dso->symbols; |
804 | struct rb_node *next = rb_first_cached(root); | |
2e538c4a | 805 | int kernel_range = 0; |
4d004365 | 806 | bool x86_64; |
2e538c4a | 807 | |
ba92732e WN |
808 | if (!kmaps) |
809 | return -1; | |
810 | ||
811 | machine = kmaps->machine; | |
812 | ||
4d004365 AH |
813 | x86_64 = machine__is(machine, "x86_64"); |
814 | ||
2e538c4a ACM |
815 | while (next) { |
816 | char *module; | |
817 | ||
818 | pos = rb_entry(next, struct symbol, rb_node); | |
819 | next = rb_next(&pos->rb_node); | |
820 | ||
821 | module = strchr(pos->name, '\t'); | |
822 | if (module) { | |
75be6cf4 | 823 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
824 | goto discard_symbol; |
825 | ||
2e538c4a ACM |
826 | *module++ = '\0'; |
827 | ||
b7cece76 | 828 | if (strcmp(curr_map->dso->short_name, module)) { |
15e0e2d4 | 829 | if (curr_map != initial_map && |
1c695c88 | 830 | dso->kernel == DSO_SPACE__KERNEL_GUEST && |
23346f21 | 831 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
832 | /* |
833 | * We assume all symbols of a module are | |
834 | * continuous in * kallsyms, so curr_map | |
835 | * points to a module and all its | |
836 | * symbols are in its kmap. Mark it as | |
837 | * loaded. | |
838 | */ | |
3183f8ca | 839 | dso__set_loaded(curr_map->dso); |
a1645ce1 ZY |
840 | } |
841 | ||
79b6bb73 | 842 | curr_map = maps__find_by_name(kmaps, module); |
4e06255f | 843 | if (curr_map == NULL) { |
2f51903b | 844 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 845 | "inconsistency while looking " |
a1645ce1 | 846 | "for \"%s\" module!\n", |
23346f21 | 847 | machine->root_dir, module); |
15e0e2d4 | 848 | curr_map = initial_map; |
a1645ce1 | 849 | goto discard_symbol; |
af427bf5 | 850 | } |
b7cece76 | 851 | |
a1645ce1 | 852 | if (curr_map->dso->loaded && |
23346f21 | 853 | !machine__is_default_guest(machine)) |
b7cece76 | 854 | goto discard_symbol; |
af427bf5 | 855 | } |
2e538c4a ACM |
856 | /* |
857 | * So that we look just like we get from .ko files, | |
15e0e2d4 | 858 | * i.e. not prelinked, relative to initial_map->start. |
2e538c4a | 859 | */ |
4e06255f ACM |
860 | pos->start = curr_map->map_ip(curr_map, pos->start); |
861 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
4d004365 AH |
862 | } else if (x86_64 && is_entry_trampoline(pos->name)) { |
863 | /* | |
864 | * These symbols are not needed anymore since the | |
865 | * trampoline maps refer to the text section and it's | |
866 | * symbols instead. Avoid having to deal with | |
867 | * relocations, and the assumption that the first symbol | |
868 | * is the start of kernel text, by simply removing the | |
869 | * symbols at this point. | |
870 | */ | |
871 | goto discard_symbol; | |
15e0e2d4 | 872 | } else if (curr_map != initial_map) { |
2e538c4a | 873 | char dso_name[PATH_MAX]; |
aeafcbaf | 874 | struct dso *ndso; |
2e538c4a | 875 | |
d9b62aba AH |
876 | if (delta) { |
877 | /* Kernel was relocated at boot time */ | |
878 | pos->start -= delta; | |
879 | pos->end -= delta; | |
880 | } | |
881 | ||
8a953312 | 882 | if (count == 0) { |
15e0e2d4 | 883 | curr_map = initial_map; |
be39db9f | 884 | goto add_symbol; |
8a953312 ACM |
885 | } |
886 | ||
1c695c88 | 887 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
a1645ce1 ZY |
888 | snprintf(dso_name, sizeof(dso_name), |
889 | "[guest.kernel].%d", | |
890 | kernel_range++); | |
891 | else | |
892 | snprintf(dso_name, sizeof(dso_name), | |
893 | "[kernel].%d", | |
894 | kernel_range++); | |
2e538c4a | 895 | |
aeafcbaf ACM |
896 | ndso = dso__new(dso_name); |
897 | if (ndso == NULL) | |
2e538c4a ACM |
898 | return -1; |
899 | ||
aeafcbaf | 900 | ndso->kernel = dso->kernel; |
a1645ce1 | 901 | |
3183f8ca | 902 | curr_map = map__new2(pos->start, ndso); |
37fe5fcb | 903 | if (curr_map == NULL) { |
d3a7c489 | 904 | dso__put(ndso); |
2e538c4a ACM |
905 | return -1; |
906 | } | |
a2928c42 | 907 | |
4e06255f | 908 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
79b6bb73 | 909 | maps__insert(kmaps, curr_map); |
2e538c4a | 910 | ++kernel_range; |
d9b62aba AH |
911 | } else if (delta) { |
912 | /* Kernel was relocated at boot time */ | |
913 | pos->start -= delta; | |
914 | pos->end -= delta; | |
2e538c4a | 915 | } |
be39db9f | 916 | add_symbol: |
15e0e2d4 | 917 | if (curr_map != initial_map) { |
7137ff50 | 918 | rb_erase_cached(&pos->rb_node, root); |
3183f8ca | 919 | symbols__insert(&curr_map->dso->symbols, pos); |
be39db9f ACM |
920 | ++moved; |
921 | } else | |
922 | ++count; | |
923 | ||
924 | continue; | |
925 | discard_symbol: | |
7137ff50 | 926 | rb_erase_cached(&pos->rb_node, root); |
be39db9f | 927 | symbol__delete(pos); |
a2928c42 ACM |
928 | } |
929 | ||
15e0e2d4 | 930 | if (curr_map != initial_map && |
1c695c88 | 931 | dso->kernel == DSO_SPACE__KERNEL_GUEST && |
23346f21 | 932 | machine__is_default_guest(kmaps->machine)) { |
3183f8ca | 933 | dso__set_loaded(curr_map->dso); |
a1645ce1 ZY |
934 | } |
935 | ||
8a953312 | 936 | return count + moved; |
2e538c4a | 937 | } |
a2928c42 | 938 | |
3f067dca ACM |
939 | bool symbol__restricted_filename(const char *filename, |
940 | const char *restricted_filename) | |
ec80fde7 ACM |
941 | { |
942 | bool restricted = false; | |
943 | ||
944 | if (symbol_conf.kptr_restrict) { | |
945 | char *r = realpath(filename, NULL); | |
946 | ||
947 | if (r != NULL) { | |
948 | restricted = strcmp(r, restricted_filename) == 0; | |
949 | free(r); | |
950 | return restricted; | |
951 | } | |
952 | } | |
953 | ||
954 | return restricted; | |
955 | } | |
956 | ||
52afdaf9 AH |
957 | struct module_info { |
958 | struct rb_node rb_node; | |
959 | char *name; | |
960 | u64 start; | |
8e0cf965 AH |
961 | }; |
962 | ||
52afdaf9 | 963 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 964 | { |
52afdaf9 AH |
965 | struct rb_node **p = &modules->rb_node; |
966 | struct rb_node *parent = NULL; | |
967 | struct module_info *m; | |
8e0cf965 | 968 | |
52afdaf9 AH |
969 | while (*p != NULL) { |
970 | parent = *p; | |
971 | m = rb_entry(parent, struct module_info, rb_node); | |
972 | if (strcmp(mi->name, m->name) < 0) | |
973 | p = &(*p)->rb_left; | |
974 | else | |
975 | p = &(*p)->rb_right; | |
976 | } | |
977 | rb_link_node(&mi->rb_node, parent, p); | |
978 | rb_insert_color(&mi->rb_node, modules); | |
979 | } | |
980 | ||
981 | static void delete_modules(struct rb_root *modules) | |
982 | { | |
983 | struct module_info *mi; | |
984 | struct rb_node *next = rb_first(modules); | |
985 | ||
986 | while (next) { | |
987 | mi = rb_entry(next, struct module_info, rb_node); | |
988 | next = rb_next(&mi->rb_node); | |
989 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 990 | zfree(&mi->name); |
52afdaf9 AH |
991 | free(mi); |
992 | } | |
993 | } | |
994 | ||
995 | static struct module_info *find_module(const char *name, | |
996 | struct rb_root *modules) | |
997 | { | |
998 | struct rb_node *n = modules->rb_node; | |
999 | ||
1000 | while (n) { | |
1001 | struct module_info *m; | |
1002 | int cmp; | |
1003 | ||
1004 | m = rb_entry(n, struct module_info, rb_node); | |
1005 | cmp = strcmp(name, m->name); | |
1006 | if (cmp < 0) | |
1007 | n = n->rb_left; | |
1008 | else if (cmp > 0) | |
1009 | n = n->rb_right; | |
1010 | else | |
1011 | return m; | |
1012 | } | |
1013 | ||
1014 | return NULL; | |
1015 | } | |
1016 | ||
9ad4652b TR |
1017 | static int __read_proc_modules(void *arg, const char *name, u64 start, |
1018 | u64 size __maybe_unused) | |
52afdaf9 AH |
1019 | { |
1020 | struct rb_root *modules = arg; | |
1021 | struct module_info *mi; | |
1022 | ||
1023 | mi = zalloc(sizeof(struct module_info)); | |
1024 | if (!mi) | |
8e0cf965 AH |
1025 | return -ENOMEM; |
1026 | ||
52afdaf9 AH |
1027 | mi->name = strdup(name); |
1028 | mi->start = start; | |
8e0cf965 | 1029 | |
52afdaf9 AH |
1030 | if (!mi->name) { |
1031 | free(mi); | |
1032 | return -ENOMEM; | |
1033 | } | |
1034 | ||
1035 | add_module(mi, modules); | |
1036 | ||
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
1041 | { | |
1042 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
1043 | return -1; | |
1044 | ||
1045 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
1046 | delete_modules(modules); | |
1047 | return -1; | |
1048 | } | |
8e0cf965 AH |
1049 | |
1050 | return 0; | |
1051 | } | |
1052 | ||
fc1b691d AH |
1053 | int compare_proc_modules(const char *from, const char *to) |
1054 | { | |
1055 | struct rb_root from_modules = RB_ROOT; | |
1056 | struct rb_root to_modules = RB_ROOT; | |
1057 | struct rb_node *from_node, *to_node; | |
1058 | struct module_info *from_m, *to_m; | |
1059 | int ret = -1; | |
1060 | ||
1061 | if (read_proc_modules(from, &from_modules)) | |
1062 | return -1; | |
1063 | ||
1064 | if (read_proc_modules(to, &to_modules)) | |
1065 | goto out_delete_from; | |
1066 | ||
1067 | from_node = rb_first(&from_modules); | |
1068 | to_node = rb_first(&to_modules); | |
1069 | while (from_node) { | |
1070 | if (!to_node) | |
1071 | break; | |
1072 | ||
1073 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
1074 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
1075 | ||
1076 | if (from_m->start != to_m->start || | |
1077 | strcmp(from_m->name, to_m->name)) | |
1078 | break; | |
1079 | ||
1080 | from_node = rb_next(from_node); | |
1081 | to_node = rb_next(to_node); | |
1082 | } | |
1083 | ||
1084 | if (!from_node && !to_node) | |
1085 | ret = 0; | |
1086 | ||
1087 | delete_modules(&to_modules); | |
1088 | out_delete_from: | |
1089 | delete_modules(&from_modules); | |
1090 | ||
1091 | return ret; | |
1092 | } | |
1093 | ||
79b6bb73 | 1094 | static int do_validate_kcore_modules(const char *filename, struct maps *kmaps) |
52afdaf9 AH |
1095 | { |
1096 | struct rb_root modules = RB_ROOT; | |
1097 | struct map *old_map; | |
1098 | int err; | |
1099 | ||
1100 | err = read_proc_modules(filename, &modules); | |
1101 | if (err) | |
1102 | return err; | |
1103 | ||
79b6bb73 | 1104 | maps__for_each_entry(kmaps, old_map) { |
52afdaf9 AH |
1105 | struct module_info *mi; |
1106 | ||
5759a682 | 1107 | if (!__map__is_kmodule(old_map)) { |
52afdaf9 AH |
1108 | continue; |
1109 | } | |
1110 | ||
1111 | /* Module must be in memory at the same address */ | |
1112 | mi = find_module(old_map->dso->short_name, &modules); | |
1113 | if (!mi || mi->start != old_map->start) { | |
1114 | err = -EINVAL; | |
1115 | goto out; | |
1116 | } | |
52afdaf9 AH |
1117 | } |
1118 | out: | |
1119 | delete_modules(&modules); | |
1120 | return err; | |
1121 | } | |
1122 | ||
8e0cf965 | 1123 | /* |
52afdaf9 | 1124 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1125 | * directory. |
1126 | */ | |
52afdaf9 AH |
1127 | static bool filename_from_kallsyms_filename(char *filename, |
1128 | const char *base_name, | |
1129 | const char *kallsyms_filename) | |
8e0cf965 AH |
1130 | { |
1131 | char *name; | |
1132 | ||
52afdaf9 AH |
1133 | strcpy(filename, kallsyms_filename); |
1134 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1135 | if (!name) |
1136 | return false; | |
1137 | ||
52afdaf9 AH |
1138 | name += 1; |
1139 | ||
1140 | if (!strcmp(name, "kallsyms")) { | |
1141 | strcpy(name, base_name); | |
8e0cf965 AH |
1142 | return true; |
1143 | } | |
1144 | ||
1145 | return false; | |
1146 | } | |
1147 | ||
52afdaf9 AH |
1148 | static int validate_kcore_modules(const char *kallsyms_filename, |
1149 | struct map *map) | |
1150 | { | |
79b6bb73 | 1151 | struct maps *kmaps = map__kmaps(map); |
52afdaf9 AH |
1152 | char modules_filename[PATH_MAX]; |
1153 | ||
ba92732e WN |
1154 | if (!kmaps) |
1155 | return -EINVAL; | |
1156 | ||
52afdaf9 AH |
1157 | if (!filename_from_kallsyms_filename(modules_filename, "modules", |
1158 | kallsyms_filename)) | |
1159 | return -EINVAL; | |
1160 | ||
5759a682 | 1161 | if (do_validate_kcore_modules(modules_filename, kmaps)) |
52afdaf9 AH |
1162 | return -EINVAL; |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
a00d28cb AH |
1167 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1168 | struct map *map) | |
1169 | { | |
1170 | struct kmap *kmap = map__kmap(map); | |
1171 | ||
ba92732e WN |
1172 | if (!kmap) |
1173 | return -EINVAL; | |
1174 | ||
a00d28cb AH |
1175 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { |
1176 | u64 start; | |
1177 | ||
b843f62a ACM |
1178 | if (kallsyms__get_function_start(kallsyms_filename, |
1179 | kmap->ref_reloc_sym->name, &start)) | |
1180 | return -ENOENT; | |
a00d28cb AH |
1181 | if (start != kmap->ref_reloc_sym->addr) |
1182 | return -EINVAL; | |
1183 | } | |
1184 | ||
1185 | return validate_kcore_modules(kallsyms_filename, map); | |
1186 | } | |
1187 | ||
52afdaf9 AH |
1188 | struct kcore_mapfn_data { |
1189 | struct dso *dso; | |
52afdaf9 AH |
1190 | struct list_head maps; |
1191 | }; | |
1192 | ||
1193 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1194 | { | |
1195 | struct kcore_mapfn_data *md = data; | |
1196 | struct map *map; | |
1197 | ||
3183f8ca | 1198 | map = map__new2(start, md->dso); |
52afdaf9 AH |
1199 | if (map == NULL) |
1200 | return -ENOMEM; | |
1201 | ||
1202 | map->end = map->start + len; | |
1203 | map->pgoff = pgoff; | |
1204 | ||
1205 | list_add(&map->node, &md->maps); | |
1206 | ||
1207 | return 0; | |
1208 | } | |
1209 | ||
fb5a88d4 | 1210 | /* |
79b6bb73 ACM |
1211 | * Merges map into maps by splitting the new map within the existing map |
1212 | * regions. | |
fb5a88d4 | 1213 | */ |
79b6bb73 | 1214 | int maps__merge_in(struct maps *kmaps, struct map *new_map) |
fb5a88d4 JO |
1215 | { |
1216 | struct map *old_map; | |
1217 | LIST_HEAD(merged); | |
1218 | ||
79b6bb73 | 1219 | maps__for_each_entry(kmaps, old_map) { |
fb5a88d4 JO |
1220 | /* no overload with this one */ |
1221 | if (new_map->end < old_map->start || | |
1222 | new_map->start >= old_map->end) | |
1223 | continue; | |
1224 | ||
1225 | if (new_map->start < old_map->start) { | |
1226 | /* | |
1227 | * |new...... | |
1228 | * |old.... | |
1229 | */ | |
1230 | if (new_map->end < old_map->end) { | |
1231 | /* | |
1232 | * |new......| -> |new..| | |
1233 | * |old....| -> |old....| | |
1234 | */ | |
1235 | new_map->end = old_map->start; | |
1236 | } else { | |
1237 | /* | |
1238 | * |new.............| -> |new..| |new..| | |
1239 | * |old....| -> |old....| | |
1240 | */ | |
1241 | struct map *m = map__clone(new_map); | |
1242 | ||
1243 | if (!m) | |
1244 | return -ENOMEM; | |
1245 | ||
1246 | m->end = old_map->start; | |
1247 | list_add_tail(&m->node, &merged); | |
0affd0e5 | 1248 | new_map->pgoff += old_map->end - new_map->start; |
fb5a88d4 JO |
1249 | new_map->start = old_map->end; |
1250 | } | |
1251 | } else { | |
1252 | /* | |
1253 | * |new...... | |
1254 | * |old.... | |
1255 | */ | |
1256 | if (new_map->end < old_map->end) { | |
1257 | /* | |
1258 | * |new..| -> x | |
1259 | * |old.........| -> |old.........| | |
1260 | */ | |
1261 | map__put(new_map); | |
1262 | new_map = NULL; | |
1263 | break; | |
1264 | } else { | |
1265 | /* | |
1266 | * |new......| -> |new...| | |
1267 | * |old....| -> |old....| | |
1268 | */ | |
0affd0e5 | 1269 | new_map->pgoff += old_map->end - new_map->start; |
fb5a88d4 JO |
1270 | new_map->start = old_map->end; |
1271 | } | |
1272 | } | |
1273 | } | |
1274 | ||
1275 | while (!list_empty(&merged)) { | |
1276 | old_map = list_entry(merged.next, struct map, node); | |
1277 | list_del_init(&old_map->node); | |
79b6bb73 | 1278 | maps__insert(kmaps, old_map); |
fb5a88d4 JO |
1279 | map__put(old_map); |
1280 | } | |
1281 | ||
1282 | if (new_map) { | |
79b6bb73 | 1283 | maps__insert(kmaps, new_map); |
fb5a88d4 JO |
1284 | map__put(new_map); |
1285 | } | |
1286 | return 0; | |
1287 | } | |
1288 | ||
8e0cf965 AH |
1289 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1290 | const char *kallsyms_filename) | |
1291 | { | |
79b6bb73 | 1292 | struct maps *kmaps = map__kmaps(map); |
8e0cf965 | 1293 | struct kcore_mapfn_data md; |
50481461 | 1294 | struct map *old_map, *new_map, *replacement_map = NULL, *next; |
1c5aae77 | 1295 | struct machine *machine; |
8e0cf965 AH |
1296 | bool is_64_bit; |
1297 | int err, fd; | |
1298 | char kcore_filename[PATH_MAX]; | |
56549978 | 1299 | u64 stext; |
8e0cf965 | 1300 | |
ba92732e WN |
1301 | if (!kmaps) |
1302 | return -EINVAL; | |
1303 | ||
1c5aae77 AH |
1304 | machine = kmaps->machine; |
1305 | ||
8e0cf965 | 1306 | /* This function requires that the map is the kernel map */ |
efdd5c6b | 1307 | if (!__map__is_kernel(map)) |
8e0cf965 AH |
1308 | return -EINVAL; |
1309 | ||
52afdaf9 AH |
1310 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1311 | kallsyms_filename)) | |
1312 | return -EINVAL; | |
1313 | ||
a00d28cb AH |
1314 | /* Modules and kernel must be present at their original addresses */ |
1315 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1316 | return -EINVAL; |
1317 | ||
1318 | md.dso = dso; | |
8e0cf965 AH |
1319 | INIT_LIST_HEAD(&md.maps); |
1320 | ||
1321 | fd = open(kcore_filename, O_RDONLY); | |
36c8bb56 | 1322 | if (fd < 0) { |
133de940 AH |
1323 | pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n", |
1324 | kcore_filename); | |
8e0cf965 | 1325 | return -EINVAL; |
36c8bb56 | 1326 | } |
8e0cf965 AH |
1327 | |
1328 | /* Read new maps into temporary lists */ | |
e9814df8 | 1329 | err = file__read_maps(fd, map->prot & PROT_EXEC, kcore_mapfn, &md, |
8e0cf965 AH |
1330 | &is_64_bit); |
1331 | if (err) | |
1332 | goto out_err; | |
c6d8f2a4 | 1333 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1334 | |
1335 | if (list_empty(&md.maps)) { | |
1336 | err = -EINVAL; | |
1337 | goto out_err; | |
1338 | } | |
1339 | ||
1340 | /* Remove old maps */ | |
79b6bb73 | 1341 | maps__for_each_entry_safe(kmaps, old_map, next) { |
fb5a88d4 JO |
1342 | /* |
1343 | * We need to preserve eBPF maps even if they are | |
1344 | * covered by kcore, because we need to access | |
1345 | * eBPF dso for source data. | |
1346 | */ | |
1347 | if (old_map != map && !__map__is_bpf_prog(old_map)) | |
79b6bb73 | 1348 | maps__remove(kmaps, old_map); |
8e0cf965 | 1349 | } |
1c5aae77 | 1350 | machine->trampolines_mapped = false; |
8e0cf965 | 1351 | |
56549978 AH |
1352 | /* Find the kernel map using the '_stext' symbol */ |
1353 | if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) { | |
1354 | list_for_each_entry(new_map, &md.maps, node) { | |
1355 | if (stext >= new_map->start && stext < new_map->end) { | |
1356 | replacement_map = new_map; | |
1357 | break; | |
1358 | } | |
8e0cf965 AH |
1359 | } |
1360 | } | |
1361 | ||
1362 | if (!replacement_map) | |
1363 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1364 | ||
1365 | /* Add new maps */ | |
1366 | while (!list_empty(&md.maps)) { | |
1367 | new_map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1368 | list_del_init(&new_map->node); |
8e0cf965 AH |
1369 | if (new_map == replacement_map) { |
1370 | map->start = new_map->start; | |
1371 | map->end = new_map->end; | |
1372 | map->pgoff = new_map->pgoff; | |
1373 | map->map_ip = new_map->map_ip; | |
1374 | map->unmap_ip = new_map->unmap_ip; | |
8e0cf965 | 1375 | /* Ensure maps are correctly ordered */ |
84c2cafa | 1376 | map__get(map); |
79b6bb73 ACM |
1377 | maps__remove(kmaps, map); |
1378 | maps__insert(kmaps, map); | |
84c2cafa | 1379 | map__put(map); |
fb5a88d4 | 1380 | map__put(new_map); |
8e0cf965 | 1381 | } else { |
fb5a88d4 JO |
1382 | /* |
1383 | * Merge kcore map into existing maps, | |
1384 | * and ensure that current maps (eBPF) | |
1385 | * stay intact. | |
1386 | */ | |
79b6bb73 | 1387 | if (maps__merge_in(kmaps, new_map)) |
fb5a88d4 | 1388 | goto out_err; |
8e0cf965 AH |
1389 | } |
1390 | } | |
1391 | ||
1c5aae77 AH |
1392 | if (machine__is(machine, "x86_64")) { |
1393 | u64 addr; | |
1394 | ||
1395 | /* | |
1396 | * If one of the corresponding symbols is there, assume the | |
1397 | * entry trampoline maps are too. | |
1398 | */ | |
1399 | if (!kallsyms__get_function_start(kallsyms_filename, | |
1400 | ENTRY_TRAMPOLINE_NAME, | |
1401 | &addr)) | |
1402 | machine->trampolines_mapped = true; | |
1403 | } | |
1404 | ||
8e0cf965 AH |
1405 | /* |
1406 | * Set the data type and long name so that kcore can be read via | |
1407 | * dso__data_read_addr(). | |
1408 | */ | |
1c695c88 | 1409 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
5f70619d | 1410 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1411 | else |
5f70619d | 1412 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1413 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1414 | |
1415 | close(fd); | |
1416 | ||
e9814df8 | 1417 | if (map->prot & PROT_EXEC) |
8e0cf965 AH |
1418 | pr_debug("Using %s for kernel object code\n", kcore_filename); |
1419 | else | |
1420 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1421 | ||
1422 | return 0; | |
1423 | ||
1424 | out_err: | |
1425 | while (!list_empty(&md.maps)) { | |
1426 | map = list_entry(md.maps.next, struct map, node); | |
facf3f06 | 1427 | list_del_init(&map->node); |
84c2cafa | 1428 | map__put(map); |
8e0cf965 AH |
1429 | } |
1430 | close(fd); | |
1431 | return -EINVAL; | |
1432 | } | |
1433 | ||
d9b62aba AH |
1434 | /* |
1435 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1436 | * delta based on the relocation reference symbol. | |
1437 | */ | |
019c6820 | 1438 | static int kallsyms__delta(struct kmap *kmap, const char *filename, u64 *delta) |
d9b62aba | 1439 | { |
d9b62aba AH |
1440 | u64 addr; |
1441 | ||
1442 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) | |
1443 | return 0; | |
1444 | ||
b843f62a | 1445 | if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr)) |
d9b62aba AH |
1446 | return -1; |
1447 | ||
1448 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1449 | return 0; | |
1450 | } | |
1451 | ||
e02092b9 | 1452 | int __dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1453 | struct map *map, bool no_kcore) |
2e538c4a | 1454 | { |
019c6820 | 1455 | struct kmap *kmap = map__kmap(map); |
d9b62aba AH |
1456 | u64 delta = 0; |
1457 | ||
ec80fde7 ACM |
1458 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1459 | return -1; | |
1460 | ||
019c6820 ACM |
1461 | if (!kmap || !kmap->kmaps) |
1462 | return -1; | |
1463 | ||
333cc76c | 1464 | if (dso__load_all_kallsyms(dso, filename) < 0) |
2e538c4a ACM |
1465 | return -1; |
1466 | ||
019c6820 | 1467 | if (kallsyms__delta(kmap, filename, &delta)) |
d9b62aba AH |
1468 | return -1; |
1469 | ||
3183f8ca ACM |
1470 | symbols__fixup_end(&dso->symbols); |
1471 | symbols__fixup_duplicate(&dso->symbols); | |
3f5a4272 | 1472 | |
1c695c88 | 1473 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
44f24cb3 | 1474 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1475 | else |
44f24cb3 | 1476 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1477 | |
e02092b9 | 1478 | if (!no_kcore && !dso__load_kcore(dso, map, filename)) |
79b6bb73 | 1479 | return maps__split_kallsyms_for_kcore(kmap->kmaps, dso); |
8e0cf965 | 1480 | else |
79b6bb73 | 1481 | return maps__split_kallsyms(kmap->kmaps, dso, delta, map); |
af427bf5 ACM |
1482 | } |
1483 | ||
e02092b9 | 1484 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
be39db9f | 1485 | struct map *map) |
e02092b9 | 1486 | { |
be39db9f | 1487 | return __dso__load_kallsyms(dso, filename, map, false); |
e02092b9 ACM |
1488 | } |
1489 | ||
3183f8ca | 1490 | static int dso__load_perf_map(const char *map_path, struct dso *dso) |
80d496be PE |
1491 | { |
1492 | char *line = NULL; | |
1493 | size_t n; | |
1494 | FILE *file; | |
1495 | int nr_syms = 0; | |
1496 | ||
bf2e710b | 1497 | file = fopen(map_path, "r"); |
80d496be PE |
1498 | if (file == NULL) |
1499 | goto out_failure; | |
1500 | ||
1501 | while (!feof(file)) { | |
9cffa8d5 | 1502 | u64 start, size; |
80d496be PE |
1503 | struct symbol *sym; |
1504 | int line_len, len; | |
1505 | ||
1506 | line_len = getline(&line, &n, file); | |
1507 | if (line_len < 0) | |
1508 | break; | |
1509 | ||
1510 | if (!line) | |
1511 | goto out_failure; | |
1512 | ||
1513 | line[--line_len] = '\0'; /* \n */ | |
1514 | ||
1515 | len = hex2u64(line, &start); | |
1516 | ||
1517 | len++; | |
1518 | if (len + 2 >= line_len) | |
1519 | continue; | |
1520 | ||
1521 | len += hex2u64(line + len, &size); | |
1522 | ||
1523 | len++; | |
1524 | if (len + 2 >= line_len) | |
1525 | continue; | |
1526 | ||
af30bffa | 1527 | sym = symbol__new(start, size, STB_GLOBAL, STT_FUNC, line + len); |
80d496be PE |
1528 | |
1529 | if (sym == NULL) | |
1530 | goto out_delete_line; | |
1531 | ||
3183f8ca | 1532 | symbols__insert(&dso->symbols, sym); |
be39db9f | 1533 | nr_syms++; |
80d496be PE |
1534 | } |
1535 | ||
1536 | free(line); | |
1537 | fclose(file); | |
1538 | ||
1539 | return nr_syms; | |
1540 | ||
1541 | out_delete_line: | |
1542 | free(line); | |
1543 | out_failure: | |
1544 | return -1; | |
1545 | } | |
1546 | ||
eac9a434 RB |
1547 | #ifdef HAVE_LIBBFD_SUPPORT |
1548 | #define PACKAGE 'perf' | |
1549 | #include <bfd.h> | |
1550 | ||
1551 | static int bfd_symbols__cmpvalue(const void *a, const void *b) | |
1552 | { | |
1553 | const asymbol *as = *(const asymbol **)a, *bs = *(const asymbol **)b; | |
1554 | ||
1555 | if (bfd_asymbol_value(as) != bfd_asymbol_value(bs)) | |
1556 | return bfd_asymbol_value(as) - bfd_asymbol_value(bs); | |
1557 | ||
1558 | return bfd_asymbol_name(as)[0] - bfd_asymbol_name(bs)[0]; | |
1559 | } | |
1560 | ||
1561 | static int bfd2elf_binding(asymbol *symbol) | |
1562 | { | |
1563 | if (symbol->flags & BSF_WEAK) | |
1564 | return STB_WEAK; | |
1565 | if (symbol->flags & BSF_GLOBAL) | |
1566 | return STB_GLOBAL; | |
1567 | if (symbol->flags & BSF_LOCAL) | |
1568 | return STB_LOCAL; | |
1569 | return -1; | |
1570 | } | |
1571 | ||
1572 | int dso__load_bfd_symbols(struct dso *dso, const char *debugfile) | |
1573 | { | |
1574 | int err = -1; | |
96de68ff | 1575 | long symbols_size, symbols_count, i; |
eac9a434 RB |
1576 | asection *section; |
1577 | asymbol **symbols, *sym; | |
1578 | struct symbol *symbol; | |
1579 | bfd *abfd; | |
eac9a434 RB |
1580 | u64 start, len; |
1581 | ||
00a34234 | 1582 | abfd = bfd_openr(debugfile, NULL); |
eac9a434 RB |
1583 | if (!abfd) |
1584 | return -1; | |
1585 | ||
1586 | if (!bfd_check_format(abfd, bfd_object)) { | |
1587 | pr_debug2("%s: cannot read %s bfd file.\n", __func__, | |
1588 | dso->long_name); | |
1589 | goto out_close; | |
1590 | } | |
1591 | ||
1592 | if (bfd_get_flavour(abfd) == bfd_target_elf_flavour) | |
1593 | goto out_close; | |
1594 | ||
eac9a434 RB |
1595 | symbols_size = bfd_get_symtab_upper_bound(abfd); |
1596 | if (symbols_size == 0) { | |
1597 | bfd_close(abfd); | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | if (symbols_size < 0) | |
1602 | goto out_close; | |
1603 | ||
1604 | symbols = malloc(symbols_size); | |
1605 | if (!symbols) | |
1606 | goto out_close; | |
1607 | ||
1608 | symbols_count = bfd_canonicalize_symtab(abfd, symbols); | |
1609 | if (symbols_count < 0) | |
1610 | goto out_free; | |
1611 | ||
d2930ede RB |
1612 | section = bfd_get_section_by_name(abfd, ".text"); |
1613 | if (section) { | |
1614 | for (i = 0; i < symbols_count; ++i) { | |
1615 | if (!strcmp(bfd_asymbol_name(symbols[i]), "__ImageBase") || | |
1616 | !strcmp(bfd_asymbol_name(symbols[i]), "__image_base__")) | |
1617 | break; | |
1618 | } | |
1619 | if (i < symbols_count) { | |
1620 | /* PE symbols can only have 4 bytes, so use .text high bits */ | |
1621 | dso->text_offset = section->vma - (u32)section->vma; | |
1622 | dso->text_offset += (u32)bfd_asymbol_value(symbols[i]); | |
1623 | } else { | |
1624 | dso->text_offset = section->vma - section->filepos; | |
1625 | } | |
1626 | } | |
1627 | ||
eac9a434 RB |
1628 | qsort(symbols, symbols_count, sizeof(asymbol *), bfd_symbols__cmpvalue); |
1629 | ||
1630 | #ifdef bfd_get_section | |
1631 | #define bfd_asymbol_section bfd_get_section | |
1632 | #endif | |
1633 | for (i = 0; i < symbols_count; ++i) { | |
1634 | sym = symbols[i]; | |
1635 | section = bfd_asymbol_section(sym); | |
1636 | if (bfd2elf_binding(sym) < 0) | |
1637 | continue; | |
1638 | ||
1639 | while (i + 1 < symbols_count && | |
1640 | bfd_asymbol_section(symbols[i + 1]) == section && | |
1641 | bfd2elf_binding(symbols[i + 1]) < 0) | |
1642 | i++; | |
1643 | ||
1644 | if (i + 1 < symbols_count && | |
1645 | bfd_asymbol_section(symbols[i + 1]) == section) | |
1646 | len = symbols[i + 1]->value - sym->value; | |
1647 | else | |
1648 | len = section->size - sym->value; | |
1649 | ||
1650 | start = bfd_asymbol_value(sym) - dso->text_offset; | |
1651 | symbol = symbol__new(start, len, bfd2elf_binding(sym), STT_FUNC, | |
1652 | bfd_asymbol_name(sym)); | |
1653 | if (!symbol) | |
1654 | goto out_free; | |
1655 | ||
1656 | symbols__insert(&dso->symbols, symbol); | |
1657 | } | |
1658 | #ifdef bfd_get_section | |
1659 | #undef bfd_asymbol_section | |
1660 | #endif | |
1661 | ||
1662 | symbols__fixup_end(&dso->symbols); | |
1663 | symbols__fixup_duplicate(&dso->symbols); | |
1664 | dso->adjust_symbols = 1; | |
1665 | ||
1666 | err = 0; | |
1667 | out_free: | |
1668 | free(symbols); | |
1669 | out_close: | |
1670 | bfd_close(abfd); | |
1671 | return err; | |
1672 | } | |
1673 | #endif | |
1674 | ||
1029f9fe NK |
1675 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1676 | enum dso_binary_type type) | |
1677 | { | |
1678 | switch (type) { | |
1679 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1680 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1681 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1682 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1683 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
85afd355 | 1684 | case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: |
1029f9fe NK |
1685 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
1686 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1c695c88 | 1687 | return !kmod && dso->kernel == DSO_SPACE__USER; |
1029f9fe NK |
1688 | |
1689 | case DSO_BINARY_TYPE__KALLSYMS: | |
1690 | case DSO_BINARY_TYPE__VMLINUX: | |
1691 | case DSO_BINARY_TYPE__KCORE: | |
1c695c88 | 1692 | return dso->kernel == DSO_SPACE__KERNEL; |
1029f9fe NK |
1693 | |
1694 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1695 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1696 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1c695c88 | 1697 | return dso->kernel == DSO_SPACE__KERNEL_GUEST; |
1029f9fe NK |
1698 | |
1699 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 1700 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
1029f9fe | 1701 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
c00c48fc | 1702 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
1029f9fe NK |
1703 | /* |
1704 | * kernel modules know their symtab type - it's set when | |
a94ab91a | 1705 | * creating a module dso in machine__addnew_module_map(). |
1029f9fe NK |
1706 | */ |
1707 | return kmod && dso->symtab_type == type; | |
1708 | ||
1709 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
d2396999 | 1710 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
1029f9fe NK |
1711 | return true; |
1712 | ||
9b86d04d | 1713 | case DSO_BINARY_TYPE__BPF_PROG_INFO: |
3c29d448 | 1714 | case DSO_BINARY_TYPE__BPF_IMAGE: |
789e2419 | 1715 | case DSO_BINARY_TYPE__OOL: |
1029f9fe NK |
1716 | case DSO_BINARY_TYPE__NOT_FOUND: |
1717 | default: | |
1718 | return false; | |
1719 | } | |
1720 | } | |
1721 | ||
bf2e710b KJ |
1722 | /* Checks for the existence of the perf-<pid>.map file in two different |
1723 | * locations. First, if the process is a separate mount namespace, check in | |
1724 | * that namespace using the pid of the innermost pid namespace. If's not in a | |
1725 | * namespace, or the file can't be found there, try in the mount namespace of | |
1726 | * the tracing process using our view of its pid. | |
1727 | */ | |
1728 | static int dso__find_perf_map(char *filebuf, size_t bufsz, | |
1729 | struct nsinfo **nsip) | |
1730 | { | |
1731 | struct nscookie nsc; | |
1732 | struct nsinfo *nsi; | |
1733 | struct nsinfo *nnsi; | |
1734 | int rc = -1; | |
1735 | ||
1736 | nsi = *nsip; | |
1737 | ||
1738 | if (nsi->need_setns) { | |
1739 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid); | |
1740 | nsinfo__mountns_enter(nsi, &nsc); | |
1741 | rc = access(filebuf, R_OK); | |
1742 | nsinfo__mountns_exit(&nsc); | |
1743 | if (rc == 0) | |
1744 | return rc; | |
1745 | } | |
1746 | ||
1747 | nnsi = nsinfo__copy(nsi); | |
1748 | if (nnsi) { | |
1749 | nsinfo__put(nsi); | |
1750 | ||
1751 | nnsi->need_setns = false; | |
1752 | snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid); | |
1753 | *nsip = nnsi; | |
1754 | rc = 0; | |
1755 | } | |
1756 | ||
1757 | return rc; | |
1758 | } | |
1759 | ||
be39db9f | 1760 | int dso__load(struct dso *dso, struct map *map) |
a2928c42 | 1761 | { |
c338aee8 | 1762 | char *name; |
a2928c42 | 1763 | int ret = -1; |
44f24cb3 | 1764 | u_int i; |
93fcce96 | 1765 | struct machine *machine = NULL; |
44f24cb3 | 1766 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1767 | int ss_pos = 0; |
1768 | struct symsrc ss_[2]; | |
1769 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1770 | bool kmod; |
bf2e710b | 1771 | bool perfmap; |
f766819c | 1772 | struct build_id bid; |
843ff37b | 1773 | struct nscookie nsc; |
bf2e710b KJ |
1774 | char newmapname[PATH_MAX]; |
1775 | const char *map_path = dso->long_name; | |
1776 | ||
1777 | perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0; | |
1778 | if (perfmap) { | |
1779 | if (dso->nsinfo && (dso__find_perf_map(newmapname, | |
1780 | sizeof(newmapname), &dso->nsinfo) == 0)) { | |
1781 | map_path = newmapname; | |
1782 | } | |
1783 | } | |
a2928c42 | 1784 | |
843ff37b | 1785 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
4a936edc NK |
1786 | pthread_mutex_lock(&dso->lock); |
1787 | ||
1788 | /* check again under the dso->lock */ | |
3183f8ca | 1789 | if (dso__loaded(dso)) { |
4a936edc NK |
1790 | ret = 1; |
1791 | goto out; | |
1792 | } | |
66bd8424 | 1793 | |
b5c09518 ACM |
1794 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
1795 | dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
1796 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE || | |
1797 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
1798 | ||
1799 | if (dso->kernel && !kmod) { | |
1c695c88 | 1800 | if (dso->kernel == DSO_SPACE__KERNEL) |
be39db9f | 1801 | ret = dso__load_kernel_sym(dso, map); |
1c695c88 | 1802 | else if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
be39db9f | 1803 | ret = dso__load_guest_kernel_sym(dso, map); |
4a936edc | 1804 | |
93fcce96 | 1805 | machine = map__kmaps(map)->machine; |
4d99e413 AH |
1806 | if (machine__is(machine, "x86_64")) |
1807 | machine__map_x86_64_entry_trampolines(machine, dso); | |
4a936edc NK |
1808 | goto out; |
1809 | } | |
a1645ce1 | 1810 | |
aeafcbaf | 1811 | dso->adjust_symbols = 0; |
f5812a7a | 1812 | |
bf2e710b | 1813 | if (perfmap) { |
3183f8ca | 1814 | ret = dso__load_perf_map(map_path, dso); |
44f24cb3 JO |
1815 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1816 | DSO_BINARY_TYPE__NOT_FOUND; | |
4a936edc | 1817 | goto out; |
94cb9e38 ACM |
1818 | } |
1819 | ||
44f24cb3 JO |
1820 | if (machine) |
1821 | root_dir = machine->root_dir; | |
1822 | ||
164c800e DA |
1823 | name = malloc(PATH_MAX); |
1824 | if (!name) | |
4a936edc | 1825 | goto out; |
164c800e | 1826 | |
5baecbcd DK |
1827 | /* |
1828 | * Read the build id if possible. This is required for | |
1829 | * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work | |
1830 | */ | |
ed6c166c | 1831 | if (!dso->has_build_id && |
9b200653 VK |
1832 | is_regular_file(dso->long_name)) { |
1833 | __symbol__join_symfs(name, PATH_MAX, dso->long_name); | |
f766819c | 1834 | if (filename__read_build_id(name, &bid) > 0) |
8dfdf440 | 1835 | dso__set_build_id(dso, &bid); |
9b200653 | 1836 | } |
5baecbcd | 1837 | |
1029f9fe NK |
1838 | /* |
1839 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1840 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1841 | * and/or opd section) for processing. | |
6da80ce8 | 1842 | */ |
44f24cb3 | 1843 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1844 | struct symsrc *ss = &ss_[ss_pos]; |
1845 | bool next_slot = false; | |
f045b8c4 | 1846 | bool is_reg; |
d2396999 | 1847 | bool nsexit; |
eac9a434 | 1848 | int bfdrc = -1; |
c3962961 | 1849 | int sirc = -1; |
6da80ce8 | 1850 | |
005f9294 | 1851 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1852 | |
d2396999 KJ |
1853 | nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE || |
1854 | symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO); | |
1855 | ||
1029f9fe NK |
1856 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1857 | continue; | |
1858 | ||
ee4e9625 ACM |
1859 | if (dso__read_binary_type_filename(dso, symtab_type, |
1860 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1861 | continue; |
6da80ce8 | 1862 | |
d2396999 | 1863 | if (nsexit) |
f045b8c4 KJ |
1864 | nsinfo__mountns_exit(&nsc); |
1865 | ||
1866 | is_reg = is_regular_file(name); | |
eac9a434 | 1867 | #ifdef HAVE_LIBBFD_SUPPORT |
c3962961 | 1868 | if (is_reg) |
eac9a434 RB |
1869 | bfdrc = dso__load_bfd_symbols(dso, name); |
1870 | #endif | |
1871 | if (is_reg && bfdrc < 0) | |
c3962961 | 1872 | sirc = symsrc__init(ss, dso, name, symtab_type); |
40356721 | 1873 | |
d2396999 | 1874 | if (nsexit) |
f045b8c4 KJ |
1875 | nsinfo__mountns_enter(dso->nsinfo, &nsc); |
1876 | ||
77771a97 NF |
1877 | if (bfdrc == 0) { |
1878 | ret = 0; | |
eac9a434 | 1879 | break; |
77771a97 | 1880 | } |
eac9a434 | 1881 | |
c3962961 | 1882 | if (!is_reg || sirc < 0) |
6da80ce8 | 1883 | continue; |
a2928c42 | 1884 | |
3aafe5ae CS |
1885 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1886 | syms_ss = ss; | |
1887 | next_slot = true; | |
0058aef6 AH |
1888 | if (!dso->symsrc_filename) |
1889 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1890 | } |
1891 | ||
3aafe5ae CS |
1892 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1893 | runtime_ss = ss; | |
1894 | next_slot = true; | |
a44f605b | 1895 | } |
a2928c42 | 1896 | |
3aafe5ae CS |
1897 | if (next_slot) { |
1898 | ss_pos++; | |
33ff581e | 1899 | |
3aafe5ae CS |
1900 | if (syms_ss && runtime_ss) |
1901 | break; | |
98e9f03b NK |
1902 | } else { |
1903 | symsrc__destroy(ss); | |
6da80ce8 | 1904 | } |
3aafe5ae | 1905 | |
a25e46c4 | 1906 | } |
6da80ce8 | 1907 | |
3aafe5ae CS |
1908 | if (!runtime_ss && !syms_ss) |
1909 | goto out_free; | |
1910 | ||
1911 | if (runtime_ss && !syms_ss) { | |
1912 | syms_ss = runtime_ss; | |
1913 | } | |
1914 | ||
1915 | /* We'll have to hope for the best */ | |
1916 | if (!runtime_ss && syms_ss) | |
1917 | runtime_ss = syms_ss; | |
1918 | ||
1029f9fe | 1919 | if (syms_ss) |
be39db9f | 1920 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod); |
1029f9fe | 1921 | else |
3aafe5ae CS |
1922 | ret = -1; |
1923 | ||
f47b58b7 | 1924 | if (ret > 0) { |
3aafe5ae CS |
1925 | int nr_plt; |
1926 | ||
3183f8ca | 1927 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss); |
3aafe5ae CS |
1928 | if (nr_plt > 0) |
1929 | ret += nr_plt; | |
60e4b10c ACM |
1930 | } |
1931 | ||
3aafe5ae CS |
1932 | for (; ss_pos > 0; ss_pos--) |
1933 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1934 | out_free: | |
a2928c42 | 1935 | free(name); |
aeafcbaf | 1936 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
4a936edc NK |
1937 | ret = 0; |
1938 | out: | |
3183f8ca | 1939 | dso__set_loaded(dso); |
4a936edc | 1940 | pthread_mutex_unlock(&dso->lock); |
843ff37b | 1941 | nsinfo__mountns_exit(&nsc); |
4a936edc | 1942 | |
a2928c42 ACM |
1943 | return ret; |
1944 | } | |
1945 | ||
a7c2b572 ACM |
1946 | static int map__strcmp(const void *a, const void *b) |
1947 | { | |
1948 | const struct map *ma = *(const struct map **)a, *mb = *(const struct map **)b; | |
1949 | return strcmp(ma->dso->short_name, mb->dso->short_name); | |
1950 | } | |
1951 | ||
1952 | static int map__strcmp_name(const void *name, const void *b) | |
1953 | { | |
1954 | const struct map *map = *(const struct map **)b; | |
1955 | return strcmp(name, map->dso->short_name); | |
1956 | } | |
1957 | ||
9a29ceee | 1958 | void __maps__sort_by_name(struct maps *maps) |
a7c2b572 | 1959 | { |
9a29ceee | 1960 | qsort(maps->maps_by_name, maps->nr_maps, sizeof(struct map *), map__strcmp); |
a7c2b572 ACM |
1961 | } |
1962 | ||
9a29ceee | 1963 | static int map__groups__sort_by_name_from_rbtree(struct maps *maps) |
a7c2b572 ACM |
1964 | { |
1965 | struct map *map; | |
9a29ceee | 1966 | struct map **maps_by_name = realloc(maps->maps_by_name, maps->nr_maps * sizeof(map)); |
a7c2b572 ACM |
1967 | int i = 0; |
1968 | ||
1969 | if (maps_by_name == NULL) | |
1970 | return -1; | |
1971 | ||
9a29ceee ACM |
1972 | maps->maps_by_name = maps_by_name; |
1973 | maps->nr_maps_allocated = maps->nr_maps; | |
a7c2b572 | 1974 | |
9a29ceee | 1975 | maps__for_each_entry(maps, map) |
a7c2b572 ACM |
1976 | maps_by_name[i++] = map; |
1977 | ||
9a29ceee | 1978 | __maps__sort_by_name(maps); |
a7c2b572 ACM |
1979 | return 0; |
1980 | } | |
1981 | ||
9a29ceee | 1982 | static struct map *__maps__find_by_name(struct maps *maps, const char *name) |
a7c2b572 ACM |
1983 | { |
1984 | struct map **mapp; | |
1985 | ||
9a29ceee ACM |
1986 | if (maps->maps_by_name == NULL && |
1987 | map__groups__sort_by_name_from_rbtree(maps)) | |
a7c2b572 ACM |
1988 | return NULL; |
1989 | ||
9a29ceee | 1990 | mapp = bsearch(name, maps->maps_by_name, maps->nr_maps, sizeof(*mapp), map__strcmp_name); |
a7c2b572 ACM |
1991 | if (mapp) |
1992 | return *mapp; | |
1993 | return NULL; | |
1994 | } | |
1995 | ||
9a29ceee | 1996 | struct map *maps__find_by_name(struct maps *maps, const char *name) |
439d473b | 1997 | { |
4bb7123d | 1998 | struct map *map; |
439d473b | 1999 | |
0a7c74ea | 2000 | down_read(&maps->lock); |
6a2ffcdd | 2001 | |
9a29ceee ACM |
2002 | if (maps->last_search_by_name && strcmp(maps->last_search_by_name->dso->short_name, name) == 0) { |
2003 | map = maps->last_search_by_name; | |
1ae14516 ACM |
2004 | goto out_unlock; |
2005 | } | |
a7c2b572 | 2006 | /* |
9a29ceee ACM |
2007 | * If we have maps->maps_by_name, then the name isn't in the rbtree, |
2008 | * as maps->maps_by_name mirrors the rbtree when lookups by name are | |
a7c2b572 ACM |
2009 | * made. |
2010 | */ | |
9a29ceee ACM |
2011 | map = __maps__find_by_name(maps, name); |
2012 | if (map || maps->maps_by_name != NULL) | |
a7c2b572 | 2013 | goto out_unlock; |
1ae14516 | 2014 | |
a7c2b572 | 2015 | /* Fallback to traversing the rbtree... */ |
c5c584d2 | 2016 | maps__for_each_entry(maps, map) |
1ae14516 | 2017 | if (strcmp(map->dso->short_name, name) == 0) { |
9a29ceee | 2018 | maps->last_search_by_name = map; |
6a2ffcdd | 2019 | goto out_unlock; |
1ae14516 | 2020 | } |
439d473b | 2021 | |
6a2ffcdd ACM |
2022 | map = NULL; |
2023 | ||
2024 | out_unlock: | |
0a7c74ea | 2025 | up_read(&maps->lock); |
6a2ffcdd | 2026 | return map; |
439d473b ACM |
2027 | } |
2028 | ||
aeafcbaf | 2029 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
be39db9f | 2030 | const char *vmlinux, bool vmlinux_allocated) |
a2928c42 | 2031 | { |
b68e2f91 CS |
2032 | int err = -1; |
2033 | struct symsrc ss; | |
ec5761ea | 2034 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 2035 | enum dso_binary_type symtab_type; |
a2928c42 | 2036 | |
5698d2c9 NK |
2037 | if (vmlinux[0] == '/') |
2038 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
2039 | else | |
972f393b | 2040 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 2041 | |
1c695c88 | 2042 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
005f9294 | 2043 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 2044 | else |
005f9294 | 2045 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 2046 | |
005f9294 | 2047 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
2048 | return -1; |
2049 | ||
be39db9f | 2050 | err = dso__load_sym(dso, map, &ss, &ss, 0); |
b68e2f91 | 2051 | symsrc__destroy(&ss); |
a2928c42 | 2052 | |
515850e4 | 2053 | if (err > 0) { |
1c695c88 | 2054 | if (dso->kernel == DSO_SPACE__KERNEL_GUEST) |
5f70619d | 2055 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 2056 | else |
5f70619d | 2057 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 2058 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
3183f8ca | 2059 | dso__set_loaded(dso); |
ec5761ea | 2060 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 2061 | } |
3846df2e | 2062 | |
a2928c42 ACM |
2063 | return err; |
2064 | } | |
2065 | ||
be39db9f | 2066 | int dso__load_vmlinux_path(struct dso *dso, struct map *map) |
a19afe46 ACM |
2067 | { |
2068 | int i, err = 0; | |
00dc8657 | 2069 | char *filename = NULL; |
a19afe46 | 2070 | |
dc38218e ACM |
2071 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", |
2072 | vmlinux_path__nr_entries + 1); | |
2073 | ||
2074 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
be39db9f | 2075 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false); |
dc38218e ACM |
2076 | if (err > 0) |
2077 | goto out; | |
2078 | } | |
2079 | ||
00dc8657 | 2080 | if (!symbol_conf.ignore_vmlinux_buildid) |
d2396999 | 2081 | filename = dso__build_id_filename(dso, NULL, 0, false); |
5ad90e4e | 2082 | if (filename != NULL) { |
be39db9f | 2083 | err = dso__load_vmlinux(dso, map, filename, true); |
5230fb7d | 2084 | if (err > 0) |
5ad90e4e | 2085 | goto out; |
5ad90e4e ACM |
2086 | free(filename); |
2087 | } | |
5ad90e4e | 2088 | out: |
a19afe46 ACM |
2089 | return err; |
2090 | } | |
2091 | ||
c48903b8 MH |
2092 | static bool visible_dir_filter(const char *name, struct dirent *d) |
2093 | { | |
2094 | if (d->d_type != DT_DIR) | |
2095 | return false; | |
2096 | return lsdir_no_dot_filter(name, d); | |
2097 | } | |
2098 | ||
0544d422 AH |
2099 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
2100 | { | |
2101 | char kallsyms_filename[PATH_MAX]; | |
0544d422 | 2102 | int ret = -1; |
c48903b8 MH |
2103 | struct strlist *dirs; |
2104 | struct str_node *nd; | |
0544d422 | 2105 | |
c48903b8 MH |
2106 | dirs = lsdir(dir, visible_dir_filter); |
2107 | if (!dirs) | |
0544d422 AH |
2108 | return -1; |
2109 | ||
602a1f4d | 2110 | strlist__for_each_entry(nd, dirs) { |
0544d422 | 2111 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), |
c48903b8 | 2112 | "%s/%s/kallsyms", dir, nd->s); |
a00d28cb | 2113 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
2114 | strlcpy(dir, kallsyms_filename, dir_sz); |
2115 | ret = 0; | |
2116 | break; | |
2117 | } | |
2118 | } | |
2119 | ||
c48903b8 | 2120 | strlist__delete(dirs); |
0544d422 AH |
2121 | |
2122 | return ret; | |
2123 | } | |
2124 | ||
11870d71 MH |
2125 | /* |
2126 | * Use open(O_RDONLY) to check readability directly instead of access(R_OK) | |
2127 | * since access(R_OK) only checks with real UID/GID but open() use effective | |
2128 | * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO). | |
2129 | */ | |
2130 | static bool filename__readable(const char *file) | |
2131 | { | |
2132 | int fd = open(file, O_RDONLY); | |
2133 | if (fd < 0) | |
2134 | return false; | |
2135 | close(fd); | |
2136 | return true; | |
2137 | } | |
2138 | ||
0544d422 AH |
2139 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) |
2140 | { | |
3ff1b8c8 | 2141 | struct build_id bid; |
b5d8bbe8 | 2142 | char sbuild_id[SBUILD_ID_SIZE]; |
0544d422 AH |
2143 | bool is_host = false; |
2144 | char path[PATH_MAX]; | |
2145 | ||
2146 | if (!dso->has_build_id) { | |
2147 | /* | |
2148 | * Last resort, if we don't have a build-id and couldn't find | |
2149 | * any vmlinux file, try the running kernel kallsyms table. | |
2150 | */ | |
2151 | goto proc_kallsyms; | |
2152 | } | |
2153 | ||
3ff1b8c8 | 2154 | if (sysfs__read_build_id("/sys/kernel/notes", &bid) == 0) |
39be8d01 | 2155 | is_host = dso__build_id_equal(dso, &bid); |
0544d422 | 2156 | |
4e4b6c06 | 2157 | /* Try a fast path for /proc/kallsyms if possible */ |
0544d422 | 2158 | if (is_host) { |
0544d422 | 2159 | /* |
11870d71 MH |
2160 | * Do not check the build-id cache, unless we know we cannot use |
2161 | * /proc/kcore or module maps don't match to /proc/kallsyms. | |
2162 | * To check readability of /proc/kcore, do not use access(R_OK) | |
2163 | * since /proc/kcore requires CAP_SYS_RAWIO to read and access | |
2164 | * can't check it. | |
0544d422 | 2165 | */ |
11870d71 MH |
2166 | if (filename__readable("/proc/kcore") && |
2167 | !validate_kcore_addresses("/proc/kallsyms", map)) | |
2168 | goto proc_kallsyms; | |
0544d422 AH |
2169 | } |
2170 | ||
bf541169 | 2171 | build_id__sprintf(&dso->bid, sbuild_id); |
4e4b6c06 | 2172 | |
449867e3 | 2173 | /* Find kallsyms in build-id cache with kcore */ |
4e4b6c06 MH |
2174 | scnprintf(path, sizeof(path), "%s/%s/%s", |
2175 | buildid_dir, DSO__NAME_KCORE, sbuild_id); | |
2176 | ||
449867e3 AH |
2177 | if (!find_matching_kcore(map, path, sizeof(path))) |
2178 | return strdup(path); | |
2179 | ||
4e4b6c06 MH |
2180 | /* Use current /proc/kallsyms if possible */ |
2181 | if (is_host) { | |
2182 | proc_kallsyms: | |
2183 | return strdup("/proc/kallsyms"); | |
2184 | } | |
2185 | ||
2186 | /* Finally, find a cache of kallsyms */ | |
01412261 | 2187 | if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) { |
0544d422 AH |
2188 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", |
2189 | sbuild_id); | |
2190 | return NULL; | |
2191 | } | |
2192 | ||
2193 | return strdup(path); | |
0544d422 AH |
2194 | } |
2195 | ||
be39db9f | 2196 | static int dso__load_kernel_sym(struct dso *dso, struct map *map) |
a827c875 | 2197 | { |
cc612d81 | 2198 | int err; |
9e201442 ACM |
2199 | const char *kallsyms_filename = NULL; |
2200 | char *kallsyms_allocated_filename = NULL; | |
ca8ea73a JO |
2201 | char *filename = NULL; |
2202 | ||
dc8d6ab2 | 2203 | /* |
b226a5a7 DA |
2204 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
2205 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
2206 | * |
2207 | * For instance, try to analyse an ARM perf.data file _without_ a | |
2208 | * build-id, or if the user specifies the wrong path to the right | |
2209 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
2210 | * x86_86 one, on the machine where analysis is being performed, say), | |
2211 | * or worse, /proc/kallsyms. | |
2212 | * | |
2213 | * If the specified file _has_ a build-id and there is a build-id | |
2214 | * section in the perf.data file, we will still do the expected | |
2215 | * validation in dso__load_vmlinux and will bail out if they don't | |
2216 | * match. | |
2217 | */ | |
b226a5a7 DA |
2218 | if (symbol_conf.kallsyms_name != NULL) { |
2219 | kallsyms_filename = symbol_conf.kallsyms_name; | |
2220 | goto do_kallsyms; | |
2221 | } | |
2222 | ||
fc2be696 | 2223 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
be39db9f | 2224 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false); |
dc8d6ab2 | 2225 | } |
cc612d81 | 2226 | |
ca8ea73a JO |
2227 | /* |
2228 | * Before checking on common vmlinux locations, check if it's | |
2229 | * stored as standard build id binary (not kallsyms) under | |
2230 | * .debug cache. | |
2231 | */ | |
2232 | if (!symbol_conf.ignore_vmlinux_buildid) | |
2233 | filename = __dso__build_id_filename(dso, NULL, 0, false, false); | |
2234 | if (filename != NULL) { | |
2235 | err = dso__load_vmlinux(dso, map, filename, true); | |
2236 | if (err > 0) | |
2237 | return err; | |
2238 | free(filename); | |
2239 | } | |
2240 | ||
fc2be696 | 2241 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
be39db9f | 2242 | err = dso__load_vmlinux_path(dso, map); |
a19afe46 | 2243 | if (err > 0) |
39b12f78 | 2244 | return err; |
cc612d81 ACM |
2245 | } |
2246 | ||
ec5761ea DA |
2247 | /* do not try local files if a symfs was given */ |
2248 | if (symbol_conf.symfs[0] != 0) | |
2249 | return -1; | |
2250 | ||
0544d422 AH |
2251 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
2252 | if (!kallsyms_allocated_filename) | |
2253 | return -1; | |
19fc2ded | 2254 | |
0544d422 | 2255 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 2256 | |
cc612d81 | 2257 | do_kallsyms: |
be39db9f | 2258 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
3846df2e ACM |
2259 | if (err > 0) |
2260 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2261 | free(kallsyms_allocated_filename); |
439d473b | 2262 | |
8e0cf965 | 2263 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 2264 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
0a77582f | 2265 | dso__set_long_name(dso, DSO__NAME_KALLSYMS, false); |
6a4694a4 ACM |
2266 | map__fixup_start(map); |
2267 | map__fixup_end(map); | |
439d473b | 2268 | } |
94cb9e38 | 2269 | |
a827c875 ACM |
2270 | return err; |
2271 | } | |
2272 | ||
be39db9f | 2273 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map) |
a1645ce1 ZY |
2274 | { |
2275 | int err; | |
2276 | const char *kallsyms_filename = NULL; | |
93fcce96 | 2277 | struct machine *machine = map__kmaps(map)->machine; |
a1645ce1 ZY |
2278 | char path[PATH_MAX]; |
2279 | ||
23346f21 | 2280 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2281 | /* |
2282 | * if the user specified a vmlinux filename, use it and only | |
2283 | * it, reporting errors to the user if it cannot be used. | |
2284 | * Or use file guest_kallsyms inputted by user on commandline | |
2285 | */ | |
2286 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2287 | err = dso__load_vmlinux(dso, map, |
5230fb7d | 2288 | symbol_conf.default_guest_vmlinux_name, |
be39db9f | 2289 | false); |
39b12f78 | 2290 | return err; |
a1645ce1 ZY |
2291 | } |
2292 | ||
2293 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2294 | if (!kallsyms_filename) | |
2295 | return -1; | |
2296 | } else { | |
23346f21 | 2297 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2298 | kallsyms_filename = path; |
2299 | } | |
2300 | ||
be39db9f | 2301 | err = dso__load_kallsyms(dso, kallsyms_filename, map); |
8e0cf965 | 2302 | if (err > 0) |
39b12f78 | 2303 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 2304 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 2305 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
8c7f1bb3 | 2306 | dso__set_long_name(dso, machine->mmap_name, false); |
a1645ce1 ZY |
2307 | map__fixup_start(map); |
2308 | map__fixup_end(map); | |
2309 | } | |
2310 | ||
2311 | return err; | |
2312 | } | |
cd84c2ac | 2313 | |
cc612d81 ACM |
2314 | static void vmlinux_path__exit(void) |
2315 | { | |
04662523 ACM |
2316 | while (--vmlinux_path__nr_entries >= 0) |
2317 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
c4f03547 | 2318 | vmlinux_path__nr_entries = 0; |
cc612d81 | 2319 | |
04662523 | 2320 | zfree(&vmlinux_path); |
cc612d81 ACM |
2321 | } |
2322 | ||
aac48647 ET |
2323 | static const char * const vmlinux_paths[] = { |
2324 | "vmlinux", | |
2325 | "/boot/vmlinux" | |
2326 | }; | |
2327 | ||
2328 | static const char * const vmlinux_paths_upd[] = { | |
2329 | "/boot/vmlinux-%s", | |
2330 | "/usr/lib/debug/boot/vmlinux-%s", | |
2331 | "/lib/modules/%s/build/vmlinux", | |
f55ae954 ET |
2332 | "/usr/lib/debug/lib/modules/%s/vmlinux", |
2333 | "/usr/lib/debug/boot/vmlinux-%s.debug" | |
aac48647 ET |
2334 | }; |
2335 | ||
2336 | static int vmlinux_path__add(const char *new_entry) | |
2337 | { | |
2338 | vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry); | |
2339 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2340 | return -1; | |
2341 | ++vmlinux_path__nr_entries; | |
2342 | ||
2343 | return 0; | |
2344 | } | |
2345 | ||
ce80d3be | 2346 | static int vmlinux_path__init(struct perf_env *env) |
cc612d81 ACM |
2347 | { |
2348 | struct utsname uts; | |
2349 | char bf[PATH_MAX]; | |
0a7e6d1b | 2350 | char *kernel_version; |
aac48647 | 2351 | unsigned int i; |
cc612d81 | 2352 | |
aac48647 ET |
2353 | vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) + |
2354 | ARRAY_SIZE(vmlinux_paths_upd))); | |
cc612d81 ACM |
2355 | if (vmlinux_path == NULL) |
2356 | return -1; | |
2357 | ||
aac48647 ET |
2358 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++) |
2359 | if (vmlinux_path__add(vmlinux_paths[i]) < 0) | |
2360 | goto out_fail; | |
ec5761ea | 2361 | |
0a7e6d1b | 2362 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
2363 | if (symbol_conf.symfs[0] != 0) |
2364 | return 0; | |
2365 | ||
0a7e6d1b NK |
2366 | if (env) { |
2367 | kernel_version = env->os_release; | |
2368 | } else { | |
2369 | if (uname(&uts) < 0) | |
2370 | goto out_fail; | |
2371 | ||
2372 | kernel_version = uts.release; | |
2373 | } | |
ec5761ea | 2374 | |
aac48647 ET |
2375 | for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) { |
2376 | snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version); | |
2377 | if (vmlinux_path__add(bf) < 0) | |
2378 | goto out_fail; | |
2379 | } | |
cc612d81 ACM |
2380 | |
2381 | return 0; | |
2382 | ||
2383 | out_fail: | |
2384 | vmlinux_path__exit(); | |
2385 | return -1; | |
2386 | } | |
2387 | ||
3bfe5f81 | 2388 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
2389 | const char *list_name) |
2390 | { | |
2391 | if (list_str == NULL) | |
2392 | return 0; | |
2393 | ||
4a77e218 | 2394 | *list = strlist__new(list_str, NULL); |
655000e7 ACM |
2395 | if (!*list) { |
2396 | pr_err("problems parsing %s list\n", list_name); | |
2397 | return -1; | |
2398 | } | |
0bc2f2f7 ACM |
2399 | |
2400 | symbol_conf.has_filter = true; | |
655000e7 ACM |
2401 | return 0; |
2402 | } | |
2403 | ||
e03eaa40 DA |
2404 | int setup_intlist(struct intlist **list, const char *list_str, |
2405 | const char *list_name) | |
2406 | { | |
2407 | if (list_str == NULL) | |
2408 | return 0; | |
2409 | ||
2410 | *list = intlist__new(list_str); | |
2411 | if (!*list) { | |
2412 | pr_err("problems parsing %s list\n", list_name); | |
2413 | return -1; | |
2414 | } | |
2415 | return 0; | |
2416 | } | |
2417 | ||
61d9fc44 JY |
2418 | static int setup_addrlist(struct intlist **addr_list, struct strlist *sym_list) |
2419 | { | |
2420 | struct str_node *pos, *tmp; | |
2421 | unsigned long val; | |
2422 | char *sep; | |
2423 | const char *end; | |
2424 | int i = 0, err; | |
2425 | ||
2426 | *addr_list = intlist__new(NULL); | |
2427 | if (!*addr_list) | |
2428 | return -1; | |
2429 | ||
2430 | strlist__for_each_entry_safe(pos, tmp, sym_list) { | |
2431 | errno = 0; | |
2432 | val = strtoul(pos->s, &sep, 16); | |
2433 | if (errno || (sep == pos->s)) | |
2434 | continue; | |
2435 | ||
2436 | if (*sep != '\0') { | |
2437 | end = pos->s + strlen(pos->s) - 1; | |
2438 | while (end >= sep && isspace(*end)) | |
2439 | end--; | |
2440 | ||
2441 | if (end >= sep) | |
2442 | continue; | |
2443 | } | |
2444 | ||
2445 | err = intlist__add(*addr_list, val); | |
2446 | if (err) | |
2447 | break; | |
2448 | ||
2449 | strlist__remove(sym_list, pos); | |
2450 | i++; | |
2451 | } | |
2452 | ||
2453 | if (i == 0) { | |
2454 | intlist__delete(*addr_list); | |
2455 | *addr_list = NULL; | |
2456 | } | |
2457 | ||
2458 | return 0; | |
2459 | } | |
2460 | ||
ec80fde7 ACM |
2461 | static bool symbol__read_kptr_restrict(void) |
2462 | { | |
2463 | bool value = false; | |
38272dc4 | 2464 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); |
ec80fde7 | 2465 | |
38272dc4 WN |
2466 | if (fp != NULL) { |
2467 | char line[8]; | |
ec80fde7 | 2468 | |
38272dc4 | 2469 | if (fgets(line, sizeof(line), fp) != NULL) |
8859aede IL |
2470 | value = perf_cap__capable(CAP_SYSLOG) ? |
2471 | (atoi(line) >= 2) : | |
2472 | (atoi(line) != 0); | |
ec80fde7 | 2473 | |
38272dc4 | 2474 | fclose(fp); |
ec80fde7 ACM |
2475 | } |
2476 | ||
8859aede IL |
2477 | /* Per kernel/kallsyms.c: |
2478 | * we also restrict when perf_event_paranoid > 1 w/o CAP_SYSLOG | |
2479 | */ | |
2480 | if (perf_event_paranoid() > 1 && !perf_cap__capable(CAP_SYSLOG)) | |
2481 | value = true; | |
2482 | ||
ec80fde7 ACM |
2483 | return value; |
2484 | } | |
2485 | ||
b01141f4 ACM |
2486 | int symbol__annotation_init(void) |
2487 | { | |
7b366142 ACM |
2488 | if (symbol_conf.init_annotation) |
2489 | return 0; | |
2490 | ||
b01141f4 ACM |
2491 | if (symbol_conf.initialized) { |
2492 | pr_err("Annotation needs to be init before symbol__init()\n"); | |
2493 | return -1; | |
2494 | } | |
2495 | ||
b01141f4 ACM |
2496 | symbol_conf.priv_size += sizeof(struct annotation); |
2497 | symbol_conf.init_annotation = true; | |
2498 | return 0; | |
2499 | } | |
2500 | ||
ce80d3be | 2501 | int symbol__init(struct perf_env *env) |
2446042c | 2502 | { |
ec5761ea DA |
2503 | const char *symfs; |
2504 | ||
85e00b55 JZ |
2505 | if (symbol_conf.initialized) |
2506 | return 0; | |
2507 | ||
9ac3e487 | 2508 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 2509 | |
166ccc9c NK |
2510 | symbol__elf_init(); |
2511 | ||
75be6cf4 ACM |
2512 | if (symbol_conf.sort_by_name) |
2513 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2514 | sizeof(struct symbol)); | |
b32d133a | 2515 | |
0a7e6d1b | 2516 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
2517 | return -1; |
2518 | ||
c410a338 ACM |
2519 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2520 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2521 | return -1; | |
2522 | } | |
2523 | ||
655000e7 ACM |
2524 | if (setup_list(&symbol_conf.dso_list, |
2525 | symbol_conf.dso_list_str, "dso") < 0) | |
2526 | return -1; | |
2527 | ||
2528 | if (setup_list(&symbol_conf.comm_list, | |
2529 | symbol_conf.comm_list_str, "comm") < 0) | |
2530 | goto out_free_dso_list; | |
2531 | ||
e03eaa40 DA |
2532 | if (setup_intlist(&symbol_conf.pid_list, |
2533 | symbol_conf.pid_list_str, "pid") < 0) | |
2534 | goto out_free_comm_list; | |
2535 | ||
2536 | if (setup_intlist(&symbol_conf.tid_list, | |
2537 | symbol_conf.tid_list_str, "tid") < 0) | |
2538 | goto out_free_pid_list; | |
2539 | ||
655000e7 ACM |
2540 | if (setup_list(&symbol_conf.sym_list, |
2541 | symbol_conf.sym_list_str, "symbol") < 0) | |
e03eaa40 | 2542 | goto out_free_tid_list; |
655000e7 | 2543 | |
61d9fc44 JY |
2544 | if (symbol_conf.sym_list && |
2545 | setup_addrlist(&symbol_conf.addr_list, symbol_conf.sym_list) < 0) | |
2546 | goto out_free_sym_list; | |
2547 | ||
64eff7d9 DA |
2548 | if (setup_list(&symbol_conf.bt_stop_list, |
2549 | symbol_conf.bt_stop_list_str, "symbol") < 0) | |
2550 | goto out_free_sym_list; | |
2551 | ||
ec5761ea DA |
2552 | /* |
2553 | * A path to symbols of "/" is identical to "" | |
2554 | * reset here for simplicity. | |
2555 | */ | |
2556 | symfs = realpath(symbol_conf.symfs, NULL); | |
2557 | if (symfs == NULL) | |
2558 | symfs = symbol_conf.symfs; | |
2559 | if (strcmp(symfs, "/") == 0) | |
2560 | symbol_conf.symfs = ""; | |
2561 | if (symfs != symbol_conf.symfs) | |
2562 | free((void *)symfs); | |
2563 | ||
ec80fde7 ACM |
2564 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2565 | ||
85e00b55 | 2566 | symbol_conf.initialized = true; |
4aa65636 | 2567 | return 0; |
655000e7 | 2568 | |
64eff7d9 DA |
2569 | out_free_sym_list: |
2570 | strlist__delete(symbol_conf.sym_list); | |
61d9fc44 | 2571 | intlist__delete(symbol_conf.addr_list); |
e03eaa40 DA |
2572 | out_free_tid_list: |
2573 | intlist__delete(symbol_conf.tid_list); | |
2574 | out_free_pid_list: | |
2575 | intlist__delete(symbol_conf.pid_list); | |
655000e7 ACM |
2576 | out_free_comm_list: |
2577 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2578 | out_free_dso_list: |
2579 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2580 | return -1; |
4aa65636 ACM |
2581 | } |
2582 | ||
d65a458b ACM |
2583 | void symbol__exit(void) |
2584 | { | |
85e00b55 JZ |
2585 | if (!symbol_conf.initialized) |
2586 | return; | |
64eff7d9 | 2587 | strlist__delete(symbol_conf.bt_stop_list); |
d65a458b ACM |
2588 | strlist__delete(symbol_conf.sym_list); |
2589 | strlist__delete(symbol_conf.dso_list); | |
2590 | strlist__delete(symbol_conf.comm_list); | |
e03eaa40 DA |
2591 | intlist__delete(symbol_conf.tid_list); |
2592 | intlist__delete(symbol_conf.pid_list); | |
61d9fc44 | 2593 | intlist__delete(symbol_conf.addr_list); |
d65a458b ACM |
2594 | vmlinux_path__exit(); |
2595 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
64eff7d9 | 2596 | symbol_conf.bt_stop_list = NULL; |
85e00b55 | 2597 | symbol_conf.initialized = false; |
d65a458b | 2598 | } |
a7066709 HK |
2599 | |
2600 | int symbol__config_symfs(const struct option *opt __maybe_unused, | |
2601 | const char *dir, int unset __maybe_unused) | |
2602 | { | |
2603 | char *bf = NULL; | |
2604 | int ret; | |
2605 | ||
2606 | symbol_conf.symfs = strdup(dir); | |
2607 | if (symbol_conf.symfs == NULL) | |
2608 | return -ENOMEM; | |
2609 | ||
2610 | /* skip the locally configured cache if a symfs is given, and | |
2611 | * config buildid dir to symfs/.debug | |
2612 | */ | |
2613 | ret = asprintf(&bf, "%s/%s", dir, ".debug"); | |
2614 | if (ret < 0) | |
2615 | return -ENOMEM; | |
2616 | ||
2617 | set_buildid_dir(bf); | |
2618 | ||
2619 | free(bf); | |
2620 | return 0; | |
2621 | } | |
9f87498f JO |
2622 | |
2623 | struct mem_info *mem_info__get(struct mem_info *mi) | |
2624 | { | |
2625 | if (mi) | |
2626 | refcount_inc(&mi->refcnt); | |
2627 | return mi; | |
2628 | } | |
2629 | ||
2630 | void mem_info__put(struct mem_info *mi) | |
2631 | { | |
2632 | if (mi && refcount_dec_and_test(&mi->refcnt)) | |
2633 | free(mi); | |
2634 | } | |
2635 | ||
2636 | struct mem_info *mem_info__new(void) | |
2637 | { | |
2638 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
2639 | ||
2640 | if (mi) | |
2641 | refcount_set(&mi->refcnt, 1); | |
2642 | return mi; | |
2643 | } | |
a3df50ab JC |
2644 | |
2645 | /* | |
2646 | * Checks that user supplied symbol kernel files are accessible because | |
2647 | * the default mechanism for accessing elf files fails silently. i.e. if | |
2648 | * debug syms for a build ID aren't found perf carries on normally. When | |
2649 | * they are user supplied we should assume that the user doesn't want to | |
2650 | * silently fail. | |
2651 | */ | |
2652 | int symbol__validate_sym_arguments(void) | |
2653 | { | |
2654 | if (symbol_conf.vmlinux_name && | |
2655 | access(symbol_conf.vmlinux_name, R_OK)) { | |
2656 | pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name); | |
2657 | return -EINVAL; | |
2658 | } | |
2659 | if (symbol_conf.kallsyms_name && | |
2660 | access(symbol_conf.kallsyms_name, R_OK)) { | |
2661 | pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name); | |
2662 | return -EINVAL; | |
2663 | } | |
2664 | return 0; | |
2665 | } |