Commit | Line | Data |
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5aab621b ACM |
1 | #include <dirent.h> |
2 | #include <errno.h> | |
5aab621b ACM |
3 | #include <stdlib.h> |
4 | #include <stdio.h> | |
5 | #include <string.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <sys/param.h> | |
9 | #include <fcntl.h> | |
10 | #include <unistd.h> | |
9486aa38 | 11 | #include <inttypes.h> |
b36f19d5 | 12 | #include "build-id.h" |
e334c726 | 13 | #include "util.h" |
8a6c5b26 | 14 | #include "debug.h" |
69d2591a | 15 | #include "machine.h" |
a2928c42 | 16 | #include "symbol.h" |
5aab621b | 17 | #include "strlist.h" |
0a7e6d1b | 18 | #include "header.h" |
a2928c42 | 19 | |
a2928c42 | 20 | #include <elf.h> |
f1617b40 | 21 | #include <limits.h> |
c506c96b | 22 | #include <symbol/kallsyms.h> |
439d473b | 23 | #include <sys/utsname.h> |
2cdbc46d | 24 | |
aeafcbaf | 25 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 26 | symbol_filter_t filter); |
aeafcbaf | 27 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 28 | symbol_filter_t filter); |
3f067dca ACM |
29 | int vmlinux_path__nr_entries; |
30 | char **vmlinux_path; | |
439d473b | 31 | |
75be6cf4 | 32 | struct symbol_conf symbol_conf = { |
e511db5e NK |
33 | .use_modules = true, |
34 | .try_vmlinux_path = true, | |
35 | .annotate_src = true, | |
36 | .demangle = true, | |
37 | .cumulate_callchain = true, | |
c8302367 | 38 | .show_hist_headers = true, |
e511db5e | 39 | .symfs = "", |
b32d133a ACM |
40 | }; |
41 | ||
44f24cb3 JO |
42 | static enum dso_binary_type binary_type_symtab[] = { |
43 | DSO_BINARY_TYPE__KALLSYMS, | |
44 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
45 | DSO_BINARY_TYPE__JAVA_JIT, | |
46 | DSO_BINARY_TYPE__DEBUGLINK, | |
47 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
48 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, | |
49 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
50 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
51 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
52 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
53 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, | |
9cd00941 | 54 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
44f24cb3 JO |
55 | DSO_BINARY_TYPE__NOT_FOUND, |
56 | }; | |
57 | ||
028df767 | 58 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 59 | |
36a3e646 | 60 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 61 | { |
31877908 AB |
62 | symbol_type = toupper(symbol_type); |
63 | ||
6893d4ee ACM |
64 | switch (map_type) { |
65 | case MAP__FUNCTION: | |
66 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 67 | case MAP__VARIABLE: |
31877908 | 68 | return symbol_type == 'D'; |
6893d4ee ACM |
69 | default: |
70 | return false; | |
71 | } | |
72 | } | |
73 | ||
694bf407 AB |
74 | static int prefix_underscores_count(const char *str) |
75 | { | |
76 | const char *tail = str; | |
77 | ||
78 | while (*tail == '_') | |
79 | tail++; | |
80 | ||
81 | return tail - str; | |
82 | } | |
83 | ||
84 | #define SYMBOL_A 0 | |
85 | #define SYMBOL_B 1 | |
86 | ||
87 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
88 | { | |
89 | s64 a; | |
90 | s64 b; | |
3445432b | 91 | size_t na, nb; |
694bf407 AB |
92 | |
93 | /* Prefer a symbol with non zero length */ | |
94 | a = syma->end - syma->start; | |
95 | b = symb->end - symb->start; | |
96 | if ((b == 0) && (a > 0)) | |
97 | return SYMBOL_A; | |
98 | else if ((a == 0) && (b > 0)) | |
99 | return SYMBOL_B; | |
100 | ||
101 | /* Prefer a non weak symbol over a weak one */ | |
102 | a = syma->binding == STB_WEAK; | |
103 | b = symb->binding == STB_WEAK; | |
104 | if (b && !a) | |
105 | return SYMBOL_A; | |
106 | if (a && !b) | |
107 | return SYMBOL_B; | |
108 | ||
109 | /* Prefer a global symbol over a non global one */ | |
110 | a = syma->binding == STB_GLOBAL; | |
111 | b = symb->binding == STB_GLOBAL; | |
112 | if (a && !b) | |
113 | return SYMBOL_A; | |
114 | if (b && !a) | |
115 | return SYMBOL_B; | |
116 | ||
117 | /* Prefer a symbol with less underscores */ | |
118 | a = prefix_underscores_count(syma->name); | |
119 | b = prefix_underscores_count(symb->name); | |
120 | if (b > a) | |
121 | return SYMBOL_A; | |
122 | else if (a > b) | |
123 | return SYMBOL_B; | |
124 | ||
3445432b AH |
125 | /* Choose the symbol with the longest name */ |
126 | na = strlen(syma->name); | |
127 | nb = strlen(symb->name); | |
128 | if (na > nb) | |
694bf407 | 129 | return SYMBOL_A; |
3445432b | 130 | else if (na < nb) |
694bf407 | 131 | return SYMBOL_B; |
3445432b AH |
132 | |
133 | /* Avoid "SyS" kernel syscall aliases */ | |
134 | if (na >= 3 && !strncmp(syma->name, "SyS", 3)) | |
135 | return SYMBOL_B; | |
136 | if (na >= 10 && !strncmp(syma->name, "compat_SyS", 10)) | |
137 | return SYMBOL_B; | |
138 | ||
139 | return SYMBOL_A; | |
694bf407 AB |
140 | } |
141 | ||
e5a1845f | 142 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
143 | { |
144 | struct rb_node *nd; | |
145 | struct symbol *curr, *next; | |
146 | ||
147 | nd = rb_first(symbols); | |
148 | ||
149 | while (nd) { | |
150 | curr = rb_entry(nd, struct symbol, rb_node); | |
151 | again: | |
152 | nd = rb_next(&curr->rb_node); | |
153 | next = rb_entry(nd, struct symbol, rb_node); | |
154 | ||
155 | if (!nd) | |
156 | break; | |
157 | ||
158 | if (curr->start != next->start) | |
159 | continue; | |
160 | ||
161 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
162 | rb_erase(&next->rb_node, symbols); | |
d4f74eb8 | 163 | symbol__delete(next); |
694bf407 AB |
164 | goto again; |
165 | } else { | |
166 | nd = rb_next(&curr->rb_node); | |
167 | rb_erase(&curr->rb_node, symbols); | |
d4f74eb8 | 168 | symbol__delete(curr); |
694bf407 AB |
169 | } |
170 | } | |
171 | } | |
172 | ||
e5a1845f | 173 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 174 | { |
aeafcbaf | 175 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 176 | struct symbol *curr, *prev; |
af427bf5 ACM |
177 | |
178 | if (prevnd == NULL) | |
179 | return; | |
180 | ||
2e538c4a ACM |
181 | curr = rb_entry(prevnd, struct symbol, rb_node); |
182 | ||
af427bf5 | 183 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
184 | prev = curr; |
185 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 186 | |
3b01a413 | 187 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 188 | prev->end = curr->start - 1; |
af427bf5 | 189 | } |
2e538c4a ACM |
190 | |
191 | /* Last entry */ | |
192 | if (curr->end == curr->start) | |
193 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
194 | } |
195 | ||
e5a1845f | 196 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
197 | { |
198 | struct map *prev, *curr; | |
aeafcbaf | 199 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
200 | |
201 | if (prevnd == NULL) | |
202 | return; | |
203 | ||
204 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
205 | |
206 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
207 | prev = curr; | |
208 | curr = rb_entry(nd, struct map, rb_node); | |
209 | prev->end = curr->start - 1; | |
2e538c4a | 210 | } |
90c83218 ACM |
211 | |
212 | /* | |
213 | * We still haven't the actual symbols, so guess the | |
214 | * last map final address. | |
215 | */ | |
9d1faba5 | 216 | curr->end = ~0ULL; |
af427bf5 ACM |
217 | } |
218 | ||
e5a1845f | 219 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 220 | { |
0085c954 | 221 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
222 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
223 | sizeof(*sym) + namelen)); | |
224 | if (sym == NULL) | |
0b73da3f IM |
225 | return NULL; |
226 | ||
75be6cf4 | 227 | if (symbol_conf.priv_size) |
aeafcbaf | 228 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 229 | |
aeafcbaf ACM |
230 | sym->start = start; |
231 | sym->end = len ? start + len - 1 : start; | |
232 | sym->binding = binding; | |
233 | sym->namelen = namelen - 1; | |
e4204992 | 234 | |
aeafcbaf ACM |
235 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
236 | __func__, name, start, sym->end); | |
237 | memcpy(sym->name, name, namelen); | |
a2928c42 | 238 | |
aeafcbaf | 239 | return sym; |
a2928c42 ACM |
240 | } |
241 | ||
aeafcbaf | 242 | void symbol__delete(struct symbol *sym) |
a2928c42 | 243 | { |
aeafcbaf | 244 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
245 | } |
246 | ||
cdd059d7 | 247 | size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 248 | { |
9486aa38 | 249 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
250 | sym->start, sym->end, |
251 | sym->binding == STB_GLOBAL ? 'g' : | |
252 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
253 | sym->name); | |
a2928c42 ACM |
254 | } |
255 | ||
a978f2ab AN |
256 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
257 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 258 | { |
a978f2ab AN |
259 | unsigned long offset; |
260 | size_t length; | |
261 | ||
262 | if (sym && sym->name) { | |
263 | length = fprintf(fp, "%s", sym->name); | |
264 | if (al) { | |
0b8c25d9 DA |
265 | if (al->addr < sym->end) |
266 | offset = al->addr - sym->start; | |
267 | else | |
268 | offset = al->addr - al->map->start - sym->start; | |
a978f2ab AN |
269 | length += fprintf(fp, "+0x%lx", offset); |
270 | } | |
271 | return length; | |
272 | } else | |
273 | return fprintf(fp, "[unknown]"); | |
274 | } | |
547a92e0 | 275 | |
a978f2ab AN |
276 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
277 | { | |
278 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
279 | } |
280 | ||
cdd059d7 | 281 | void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
282 | { |
283 | struct symbol *pos; | |
aeafcbaf | 284 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
285 | |
286 | while (next) { | |
287 | pos = rb_entry(next, struct symbol, rb_node); | |
288 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 289 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 290 | symbol__delete(pos); |
a2928c42 ACM |
291 | } |
292 | } | |
293 | ||
e5a1845f | 294 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 295 | { |
aeafcbaf | 296 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 297 | struct rb_node *parent = NULL; |
9cffa8d5 | 298 | const u64 ip = sym->start; |
a2928c42 ACM |
299 | struct symbol *s; |
300 | ||
301 | while (*p != NULL) { | |
302 | parent = *p; | |
303 | s = rb_entry(parent, struct symbol, rb_node); | |
304 | if (ip < s->start) | |
305 | p = &(*p)->rb_left; | |
306 | else | |
307 | p = &(*p)->rb_right; | |
308 | } | |
309 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 310 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
311 | } |
312 | ||
aeafcbaf | 313 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
314 | { |
315 | struct rb_node *n; | |
316 | ||
aeafcbaf | 317 | if (symbols == NULL) |
a2928c42 ACM |
318 | return NULL; |
319 | ||
aeafcbaf | 320 | n = symbols->rb_node; |
a2928c42 ACM |
321 | |
322 | while (n) { | |
323 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
324 | ||
325 | if (ip < s->start) | |
326 | n = n->rb_left; | |
327 | else if (ip > s->end) | |
328 | n = n->rb_right; | |
329 | else | |
330 | return s; | |
331 | } | |
332 | ||
333 | return NULL; | |
334 | } | |
335 | ||
8e0cf965 AH |
336 | static struct symbol *symbols__first(struct rb_root *symbols) |
337 | { | |
338 | struct rb_node *n = rb_first(symbols); | |
339 | ||
340 | if (n) | |
341 | return rb_entry(n, struct symbol, rb_node); | |
342 | ||
343 | return NULL; | |
344 | } | |
345 | ||
9c00a81b AH |
346 | static struct symbol *symbols__next(struct symbol *sym) |
347 | { | |
348 | struct rb_node *n = rb_next(&sym->rb_node); | |
349 | ||
350 | if (n) | |
351 | return rb_entry(n, struct symbol, rb_node); | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
79406cd7 ACM |
356 | struct symbol_name_rb_node { |
357 | struct rb_node rb_node; | |
358 | struct symbol sym; | |
359 | }; | |
360 | ||
aeafcbaf | 361 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 362 | { |
aeafcbaf | 363 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 364 | struct rb_node *parent = NULL; |
02a9d037 RV |
365 | struct symbol_name_rb_node *symn, *s; |
366 | ||
367 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
368 | |
369 | while (*p != NULL) { | |
370 | parent = *p; | |
371 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
372 | if (strcmp(sym->name, s->sym.name) < 0) | |
373 | p = &(*p)->rb_left; | |
374 | else | |
375 | p = &(*p)->rb_right; | |
376 | } | |
377 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 378 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
379 | } |
380 | ||
aeafcbaf ACM |
381 | static void symbols__sort_by_name(struct rb_root *symbols, |
382 | struct rb_root *source) | |
79406cd7 ACM |
383 | { |
384 | struct rb_node *nd; | |
385 | ||
386 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
387 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 388 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
389 | } |
390 | } | |
391 | ||
aeafcbaf ACM |
392 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
393 | const char *name) | |
79406cd7 ACM |
394 | { |
395 | struct rb_node *n; | |
396 | ||
aeafcbaf | 397 | if (symbols == NULL) |
79406cd7 ACM |
398 | return NULL; |
399 | ||
aeafcbaf | 400 | n = symbols->rb_node; |
79406cd7 ACM |
401 | |
402 | while (n) { | |
403 | struct symbol_name_rb_node *s; | |
404 | int cmp; | |
405 | ||
406 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
407 | cmp = strcmp(name, s->sym.name); | |
408 | ||
409 | if (cmp < 0) | |
410 | n = n->rb_left; | |
411 | else if (cmp > 0) | |
412 | n = n->rb_right; | |
413 | else | |
414 | return &s->sym; | |
415 | } | |
416 | ||
417 | return NULL; | |
418 | } | |
419 | ||
aeafcbaf | 420 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 421 | enum map_type type, u64 addr) |
fcf1203a | 422 | { |
aeafcbaf | 423 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
424 | } |
425 | ||
9c00a81b | 426 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
8e0cf965 AH |
427 | { |
428 | return symbols__first(&dso->symbols[type]); | |
9c00a81b AH |
429 | } |
430 | ||
431 | struct symbol *dso__next_symbol(struct symbol *sym) | |
432 | { | |
433 | return symbols__next(sym); | |
8e0cf965 AH |
434 | } |
435 | ||
aeafcbaf | 436 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
437 | const char *name) |
438 | { | |
aeafcbaf | 439 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
440 | } |
441 | ||
aeafcbaf | 442 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 443 | { |
aeafcbaf ACM |
444 | dso__set_sorted_by_name(dso, type); |
445 | return symbols__sort_by_name(&dso->symbol_names[type], | |
446 | &dso->symbols[type]); | |
79406cd7 ACM |
447 | } |
448 | ||
aeafcbaf ACM |
449 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
450 | enum map_type type, FILE *fp) | |
90f18e63 SD |
451 | { |
452 | size_t ret = 0; | |
453 | struct rb_node *nd; | |
454 | struct symbol_name_rb_node *pos; | |
455 | ||
aeafcbaf | 456 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
457 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
458 | fprintf(fp, "%s\n", pos->sym.name); | |
459 | } | |
460 | ||
461 | return ret; | |
462 | } | |
463 | ||
316d70d6 AH |
464 | int modules__parse(const char *filename, void *arg, |
465 | int (*process_module)(void *arg, const char *name, | |
466 | u64 start)) | |
467 | { | |
468 | char *line = NULL; | |
469 | size_t n; | |
470 | FILE *file; | |
471 | int err = 0; | |
472 | ||
473 | file = fopen(filename, "r"); | |
474 | if (file == NULL) | |
475 | return -1; | |
476 | ||
477 | while (1) { | |
478 | char name[PATH_MAX]; | |
479 | u64 start; | |
480 | char *sep; | |
481 | ssize_t line_len; | |
482 | ||
483 | line_len = getline(&line, &n, file); | |
484 | if (line_len < 0) { | |
485 | if (feof(file)) | |
486 | break; | |
487 | err = -1; | |
488 | goto out; | |
489 | } | |
490 | ||
491 | if (!line) { | |
492 | err = -1; | |
493 | goto out; | |
494 | } | |
495 | ||
496 | line[--line_len] = '\0'; /* \n */ | |
497 | ||
498 | sep = strrchr(line, 'x'); | |
499 | if (sep == NULL) | |
500 | continue; | |
501 | ||
502 | hex2u64(sep + 1, &start); | |
503 | ||
504 | sep = strchr(line, ' '); | |
505 | if (sep == NULL) | |
506 | continue; | |
507 | ||
508 | *sep = '\0'; | |
509 | ||
510 | scnprintf(name, sizeof(name), "[%s]", line); | |
511 | ||
512 | err = process_module(arg, name, start); | |
513 | if (err) | |
514 | break; | |
515 | } | |
516 | out: | |
517 | free(line); | |
518 | fclose(file); | |
519 | return err; | |
520 | } | |
521 | ||
682b335a ACM |
522 | struct process_kallsyms_args { |
523 | struct map *map; | |
524 | struct dso *dso; | |
525 | }; | |
526 | ||
e7110b9f ACM |
527 | /* |
528 | * These are symbols in the kernel image, so make sure that | |
529 | * sym is from a kernel DSO. | |
530 | */ | |
82d1deb0 DA |
531 | bool symbol__is_idle(struct symbol *sym) |
532 | { | |
533 | const char * const idle_symbols[] = { | |
534 | "cpu_idle", | |
e0336ed6 | 535 | "cpu_startup_entry", |
82d1deb0 DA |
536 | "intel_idle", |
537 | "default_idle", | |
538 | "native_safe_halt", | |
539 | "enter_idle", | |
540 | "exit_idle", | |
541 | "mwait_idle", | |
542 | "mwait_idle_with_hints", | |
543 | "poll_idle", | |
544 | "ppc64_runlatch_off", | |
545 | "pseries_dedicated_idle_sleep", | |
546 | NULL | |
547 | }; | |
548 | ||
549 | int i; | |
550 | ||
551 | if (!sym) | |
552 | return false; | |
553 | ||
554 | for (i = 0; idle_symbols[i]; i++) { | |
555 | if (!strcmp(idle_symbols[i], sym->name)) | |
556 | return true; | |
557 | } | |
558 | ||
559 | return false; | |
560 | } | |
561 | ||
682b335a | 562 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 563 | char type, u64 start) |
682b335a ACM |
564 | { |
565 | struct symbol *sym; | |
566 | struct process_kallsyms_args *a = arg; | |
567 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
568 | ||
569 | if (!symbol_type__is_a(type, a->map->type)) | |
570 | return 0; | |
571 | ||
82151520 CS |
572 | /* |
573 | * module symbols are not sorted so we add all | |
574 | * symbols, setting length to 0, and rely on | |
575 | * symbols__fixup_end() to fix it up. | |
576 | */ | |
577 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
578 | if (sym == NULL) |
579 | return -ENOMEM; | |
580 | /* | |
581 | * We will pass the symbols to the filter later, in | |
582 | * map__split_kallsyms, when we have split the maps per module | |
583 | */ | |
584 | symbols__insert(root, sym); | |
a1645ce1 | 585 | |
682b335a ACM |
586 | return 0; |
587 | } | |
588 | ||
589 | /* | |
590 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
591 | * so that we can in the next step set the symbol ->end address and then | |
592 | * call kernel_maps__split_kallsyms. | |
593 | */ | |
aeafcbaf | 594 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 595 | struct map *map) |
682b335a | 596 | { |
aeafcbaf | 597 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 598 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
599 | } |
600 | ||
8e0cf965 AH |
601 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
602 | symbol_filter_t filter) | |
603 | { | |
604 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
605 | struct map *curr_map; | |
606 | struct symbol *pos; | |
607 | int count = 0, moved = 0; | |
608 | struct rb_root *root = &dso->symbols[map->type]; | |
609 | struct rb_node *next = rb_first(root); | |
610 | ||
611 | while (next) { | |
612 | char *module; | |
613 | ||
614 | pos = rb_entry(next, struct symbol, rb_node); | |
615 | next = rb_next(&pos->rb_node); | |
616 | ||
617 | module = strchr(pos->name, '\t'); | |
618 | if (module) | |
619 | *module = '\0'; | |
620 | ||
621 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
622 | ||
623 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
624 | rb_erase(&pos->rb_node, root); | |
625 | symbol__delete(pos); | |
626 | } else { | |
627 | pos->start -= curr_map->start - curr_map->pgoff; | |
628 | if (pos->end) | |
629 | pos->end -= curr_map->start - curr_map->pgoff; | |
630 | if (curr_map != map) { | |
631 | rb_erase(&pos->rb_node, root); | |
632 | symbols__insert( | |
633 | &curr_map->dso->symbols[curr_map->type], | |
634 | pos); | |
635 | ++moved; | |
636 | } else { | |
637 | ++count; | |
638 | } | |
639 | } | |
640 | } | |
641 | ||
642 | /* Symbols have been adjusted */ | |
643 | dso->adjust_symbols = 1; | |
644 | ||
645 | return count + moved; | |
646 | } | |
647 | ||
2e538c4a ACM |
648 | /* |
649 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
650 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
651 | * the original ELF section names vmlinux have. | |
652 | */ | |
d9b62aba | 653 | static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta, |
9de89fe7 | 654 | symbol_filter_t filter) |
2e538c4a | 655 | { |
9de89fe7 | 656 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 657 | struct machine *machine = kmaps->machine; |
4e06255f | 658 | struct map *curr_map = map; |
2e538c4a | 659 | struct symbol *pos; |
8a953312 | 660 | int count = 0, moved = 0; |
aeafcbaf | 661 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 662 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
663 | int kernel_range = 0; |
664 | ||
665 | while (next) { | |
666 | char *module; | |
667 | ||
668 | pos = rb_entry(next, struct symbol, rb_node); | |
669 | next = rb_next(&pos->rb_node); | |
670 | ||
671 | module = strchr(pos->name, '\t'); | |
672 | if (module) { | |
75be6cf4 | 673 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
674 | goto discard_symbol; |
675 | ||
2e538c4a ACM |
676 | *module++ = '\0'; |
677 | ||
b7cece76 | 678 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 679 | if (curr_map != map && |
aeafcbaf | 680 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 681 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
682 | /* |
683 | * We assume all symbols of a module are | |
684 | * continuous in * kallsyms, so curr_map | |
685 | * points to a module and all its | |
686 | * symbols are in its kmap. Mark it as | |
687 | * loaded. | |
688 | */ | |
689 | dso__set_loaded(curr_map->dso, | |
690 | curr_map->type); | |
691 | } | |
692 | ||
693 | curr_map = map_groups__find_by_name(kmaps, | |
694 | map->type, module); | |
4e06255f | 695 | if (curr_map == NULL) { |
2f51903b | 696 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 697 | "inconsistency while looking " |
a1645ce1 | 698 | "for \"%s\" module!\n", |
23346f21 | 699 | machine->root_dir, module); |
a1645ce1 ZY |
700 | curr_map = map; |
701 | goto discard_symbol; | |
af427bf5 | 702 | } |
b7cece76 | 703 | |
a1645ce1 | 704 | if (curr_map->dso->loaded && |
23346f21 | 705 | !machine__is_default_guest(machine)) |
b7cece76 | 706 | goto discard_symbol; |
af427bf5 | 707 | } |
2e538c4a ACM |
708 | /* |
709 | * So that we look just like we get from .ko files, | |
710 | * i.e. not prelinked, relative to map->start. | |
711 | */ | |
4e06255f ACM |
712 | pos->start = curr_map->map_ip(curr_map, pos->start); |
713 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
714 | } else if (curr_map != map) { | |
2e538c4a | 715 | char dso_name[PATH_MAX]; |
aeafcbaf | 716 | struct dso *ndso; |
2e538c4a | 717 | |
d9b62aba AH |
718 | if (delta) { |
719 | /* Kernel was relocated at boot time */ | |
720 | pos->start -= delta; | |
721 | pos->end -= delta; | |
722 | } | |
723 | ||
8a953312 ACM |
724 | if (count == 0) { |
725 | curr_map = map; | |
726 | goto filter_symbol; | |
727 | } | |
728 | ||
aeafcbaf | 729 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
730 | snprintf(dso_name, sizeof(dso_name), |
731 | "[guest.kernel].%d", | |
732 | kernel_range++); | |
733 | else | |
734 | snprintf(dso_name, sizeof(dso_name), | |
735 | "[kernel].%d", | |
736 | kernel_range++); | |
2e538c4a | 737 | |
aeafcbaf ACM |
738 | ndso = dso__new(dso_name); |
739 | if (ndso == NULL) | |
2e538c4a ACM |
740 | return -1; |
741 | ||
aeafcbaf | 742 | ndso->kernel = dso->kernel; |
a1645ce1 | 743 | |
aeafcbaf | 744 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 745 | if (curr_map == NULL) { |
aeafcbaf | 746 | dso__delete(ndso); |
2e538c4a ACM |
747 | return -1; |
748 | } | |
a2928c42 | 749 | |
4e06255f | 750 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 751 | map_groups__insert(kmaps, curr_map); |
2e538c4a | 752 | ++kernel_range; |
d9b62aba AH |
753 | } else if (delta) { |
754 | /* Kernel was relocated at boot time */ | |
755 | pos->start -= delta; | |
756 | pos->end -= delta; | |
2e538c4a | 757 | } |
8a953312 | 758 | filter_symbol: |
4e06255f | 759 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 760 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 761 | symbol__delete(pos); |
2e538c4a | 762 | } else { |
4e06255f ACM |
763 | if (curr_map != map) { |
764 | rb_erase(&pos->rb_node, root); | |
765 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
766 | ++moved; |
767 | } else | |
768 | ++count; | |
9974f496 | 769 | } |
a2928c42 ACM |
770 | } |
771 | ||
a1645ce1 | 772 | if (curr_map != map && |
aeafcbaf | 773 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 774 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
775 | dso__set_loaded(curr_map->dso, curr_map->type); |
776 | } | |
777 | ||
8a953312 | 778 | return count + moved; |
2e538c4a | 779 | } |
a2928c42 | 780 | |
3f067dca ACM |
781 | bool symbol__restricted_filename(const char *filename, |
782 | const char *restricted_filename) | |
ec80fde7 ACM |
783 | { |
784 | bool restricted = false; | |
785 | ||
786 | if (symbol_conf.kptr_restrict) { | |
787 | char *r = realpath(filename, NULL); | |
788 | ||
789 | if (r != NULL) { | |
790 | restricted = strcmp(r, restricted_filename) == 0; | |
791 | free(r); | |
792 | return restricted; | |
793 | } | |
794 | } | |
795 | ||
796 | return restricted; | |
797 | } | |
798 | ||
52afdaf9 AH |
799 | struct module_info { |
800 | struct rb_node rb_node; | |
801 | char *name; | |
802 | u64 start; | |
8e0cf965 AH |
803 | }; |
804 | ||
52afdaf9 | 805 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 806 | { |
52afdaf9 AH |
807 | struct rb_node **p = &modules->rb_node; |
808 | struct rb_node *parent = NULL; | |
809 | struct module_info *m; | |
8e0cf965 | 810 | |
52afdaf9 AH |
811 | while (*p != NULL) { |
812 | parent = *p; | |
813 | m = rb_entry(parent, struct module_info, rb_node); | |
814 | if (strcmp(mi->name, m->name) < 0) | |
815 | p = &(*p)->rb_left; | |
816 | else | |
817 | p = &(*p)->rb_right; | |
818 | } | |
819 | rb_link_node(&mi->rb_node, parent, p); | |
820 | rb_insert_color(&mi->rb_node, modules); | |
821 | } | |
822 | ||
823 | static void delete_modules(struct rb_root *modules) | |
824 | { | |
825 | struct module_info *mi; | |
826 | struct rb_node *next = rb_first(modules); | |
827 | ||
828 | while (next) { | |
829 | mi = rb_entry(next, struct module_info, rb_node); | |
830 | next = rb_next(&mi->rb_node); | |
831 | rb_erase(&mi->rb_node, modules); | |
74cf249d | 832 | zfree(&mi->name); |
52afdaf9 AH |
833 | free(mi); |
834 | } | |
835 | } | |
836 | ||
837 | static struct module_info *find_module(const char *name, | |
838 | struct rb_root *modules) | |
839 | { | |
840 | struct rb_node *n = modules->rb_node; | |
841 | ||
842 | while (n) { | |
843 | struct module_info *m; | |
844 | int cmp; | |
845 | ||
846 | m = rb_entry(n, struct module_info, rb_node); | |
847 | cmp = strcmp(name, m->name); | |
848 | if (cmp < 0) | |
849 | n = n->rb_left; | |
850 | else if (cmp > 0) | |
851 | n = n->rb_right; | |
852 | else | |
853 | return m; | |
854 | } | |
855 | ||
856 | return NULL; | |
857 | } | |
858 | ||
859 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
860 | { | |
861 | struct rb_root *modules = arg; | |
862 | struct module_info *mi; | |
863 | ||
864 | mi = zalloc(sizeof(struct module_info)); | |
865 | if (!mi) | |
8e0cf965 AH |
866 | return -ENOMEM; |
867 | ||
52afdaf9 AH |
868 | mi->name = strdup(name); |
869 | mi->start = start; | |
8e0cf965 | 870 | |
52afdaf9 AH |
871 | if (!mi->name) { |
872 | free(mi); | |
873 | return -ENOMEM; | |
874 | } | |
875 | ||
876 | add_module(mi, modules); | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
881 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
882 | { | |
883 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
884 | return -1; | |
885 | ||
886 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
887 | delete_modules(modules); | |
888 | return -1; | |
889 | } | |
8e0cf965 AH |
890 | |
891 | return 0; | |
892 | } | |
893 | ||
fc1b691d AH |
894 | int compare_proc_modules(const char *from, const char *to) |
895 | { | |
896 | struct rb_root from_modules = RB_ROOT; | |
897 | struct rb_root to_modules = RB_ROOT; | |
898 | struct rb_node *from_node, *to_node; | |
899 | struct module_info *from_m, *to_m; | |
900 | int ret = -1; | |
901 | ||
902 | if (read_proc_modules(from, &from_modules)) | |
903 | return -1; | |
904 | ||
905 | if (read_proc_modules(to, &to_modules)) | |
906 | goto out_delete_from; | |
907 | ||
908 | from_node = rb_first(&from_modules); | |
909 | to_node = rb_first(&to_modules); | |
910 | while (from_node) { | |
911 | if (!to_node) | |
912 | break; | |
913 | ||
914 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
915 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
916 | ||
917 | if (from_m->start != to_m->start || | |
918 | strcmp(from_m->name, to_m->name)) | |
919 | break; | |
920 | ||
921 | from_node = rb_next(from_node); | |
922 | to_node = rb_next(to_node); | |
923 | } | |
924 | ||
925 | if (!from_node && !to_node) | |
926 | ret = 0; | |
927 | ||
928 | delete_modules(&to_modules); | |
929 | out_delete_from: | |
930 | delete_modules(&from_modules); | |
931 | ||
932 | return ret; | |
933 | } | |
934 | ||
52afdaf9 AH |
935 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
936 | struct map_groups *kmaps) | |
937 | { | |
938 | struct rb_root modules = RB_ROOT; | |
939 | struct map *old_map; | |
940 | int err; | |
941 | ||
942 | err = read_proc_modules(filename, &modules); | |
943 | if (err) | |
944 | return err; | |
945 | ||
946 | old_map = map_groups__first(kmaps, map->type); | |
947 | while (old_map) { | |
948 | struct map *next = map_groups__next(old_map); | |
949 | struct module_info *mi; | |
950 | ||
951 | if (old_map == map || old_map->start == map->start) { | |
952 | /* The kernel map */ | |
953 | old_map = next; | |
954 | continue; | |
955 | } | |
956 | ||
957 | /* Module must be in memory at the same address */ | |
958 | mi = find_module(old_map->dso->short_name, &modules); | |
959 | if (!mi || mi->start != old_map->start) { | |
960 | err = -EINVAL; | |
961 | goto out; | |
962 | } | |
963 | ||
964 | old_map = next; | |
965 | } | |
966 | out: | |
967 | delete_modules(&modules); | |
968 | return err; | |
969 | } | |
970 | ||
8e0cf965 | 971 | /* |
52afdaf9 | 972 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
973 | * directory. |
974 | */ | |
52afdaf9 AH |
975 | static bool filename_from_kallsyms_filename(char *filename, |
976 | const char *base_name, | |
977 | const char *kallsyms_filename) | |
8e0cf965 AH |
978 | { |
979 | char *name; | |
980 | ||
52afdaf9 AH |
981 | strcpy(filename, kallsyms_filename); |
982 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
983 | if (!name) |
984 | return false; | |
985 | ||
52afdaf9 AH |
986 | name += 1; |
987 | ||
988 | if (!strcmp(name, "kallsyms")) { | |
989 | strcpy(name, base_name); | |
8e0cf965 AH |
990 | return true; |
991 | } | |
992 | ||
993 | return false; | |
994 | } | |
995 | ||
52afdaf9 AH |
996 | static int validate_kcore_modules(const char *kallsyms_filename, |
997 | struct map *map) | |
998 | { | |
999 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1000 | char modules_filename[PATH_MAX]; | |
1001 | ||
1002 | if (!filename_from_kallsyms_filename(modules_filename, "modules", | |
1003 | kallsyms_filename)) | |
1004 | return -EINVAL; | |
1005 | ||
1006 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1007 | return -EINVAL; | |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
a00d28cb AH |
1012 | static int validate_kcore_addresses(const char *kallsyms_filename, |
1013 | struct map *map) | |
1014 | { | |
1015 | struct kmap *kmap = map__kmap(map); | |
1016 | ||
1017 | if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { | |
1018 | u64 start; | |
1019 | ||
1020 | start = kallsyms__get_function_start(kallsyms_filename, | |
1021 | kmap->ref_reloc_sym->name); | |
1022 | if (start != kmap->ref_reloc_sym->addr) | |
1023 | return -EINVAL; | |
1024 | } | |
1025 | ||
1026 | return validate_kcore_modules(kallsyms_filename, map); | |
1027 | } | |
1028 | ||
52afdaf9 AH |
1029 | struct kcore_mapfn_data { |
1030 | struct dso *dso; | |
1031 | enum map_type type; | |
1032 | struct list_head maps; | |
1033 | }; | |
1034 | ||
1035 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1036 | { | |
1037 | struct kcore_mapfn_data *md = data; | |
1038 | struct map *map; | |
1039 | ||
1040 | map = map__new2(start, md->dso, md->type); | |
1041 | if (map == NULL) | |
1042 | return -ENOMEM; | |
1043 | ||
1044 | map->end = map->start + len; | |
1045 | map->pgoff = pgoff; | |
1046 | ||
1047 | list_add(&map->node, &md->maps); | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
8e0cf965 AH |
1052 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1053 | const char *kallsyms_filename) | |
1054 | { | |
1055 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1056 | struct machine *machine = kmaps->machine; | |
1057 | struct kcore_mapfn_data md; | |
1058 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1059 | bool is_64_bit; | |
1060 | int err, fd; | |
1061 | char kcore_filename[PATH_MAX]; | |
1062 | struct symbol *sym; | |
1063 | ||
1064 | /* This function requires that the map is the kernel map */ | |
1065 | if (map != machine->vmlinux_maps[map->type]) | |
1066 | return -EINVAL; | |
1067 | ||
52afdaf9 AH |
1068 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1069 | kallsyms_filename)) | |
1070 | return -EINVAL; | |
1071 | ||
a00d28cb AH |
1072 | /* Modules and kernel must be present at their original addresses */ |
1073 | if (validate_kcore_addresses(kallsyms_filename, map)) | |
8e0cf965 AH |
1074 | return -EINVAL; |
1075 | ||
1076 | md.dso = dso; | |
1077 | md.type = map->type; | |
1078 | INIT_LIST_HEAD(&md.maps); | |
1079 | ||
1080 | fd = open(kcore_filename, O_RDONLY); | |
1081 | if (fd < 0) | |
1082 | return -EINVAL; | |
1083 | ||
1084 | /* Read new maps into temporary lists */ | |
1085 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1086 | &is_64_bit); | |
1087 | if (err) | |
1088 | goto out_err; | |
c6d8f2a4 | 1089 | dso->is_64_bit = is_64_bit; |
8e0cf965 AH |
1090 | |
1091 | if (list_empty(&md.maps)) { | |
1092 | err = -EINVAL; | |
1093 | goto out_err; | |
1094 | } | |
1095 | ||
1096 | /* Remove old maps */ | |
1097 | old_map = map_groups__first(kmaps, map->type); | |
1098 | while (old_map) { | |
1099 | struct map *next = map_groups__next(old_map); | |
1100 | ||
1101 | if (old_map != map) | |
1102 | map_groups__remove(kmaps, old_map); | |
1103 | old_map = next; | |
1104 | } | |
1105 | ||
1106 | /* Find the kernel map using the first symbol */ | |
1107 | sym = dso__first_symbol(dso, map->type); | |
1108 | list_for_each_entry(new_map, &md.maps, node) { | |
1109 | if (sym && sym->start >= new_map->start && | |
1110 | sym->start < new_map->end) { | |
1111 | replacement_map = new_map; | |
1112 | break; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | if (!replacement_map) | |
1117 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1118 | ||
1119 | /* Add new maps */ | |
1120 | while (!list_empty(&md.maps)) { | |
1121 | new_map = list_entry(md.maps.next, struct map, node); | |
1122 | list_del(&new_map->node); | |
1123 | if (new_map == replacement_map) { | |
1124 | map->start = new_map->start; | |
1125 | map->end = new_map->end; | |
1126 | map->pgoff = new_map->pgoff; | |
1127 | map->map_ip = new_map->map_ip; | |
1128 | map->unmap_ip = new_map->unmap_ip; | |
1129 | map__delete(new_map); | |
1130 | /* Ensure maps are correctly ordered */ | |
1131 | map_groups__remove(kmaps, map); | |
1132 | map_groups__insert(kmaps, map); | |
1133 | } else { | |
1134 | map_groups__insert(kmaps, new_map); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * Set the data type and long name so that kcore can be read via | |
1140 | * dso__data_read_addr(). | |
1141 | */ | |
1142 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
5f70619d | 1143 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE; |
8e0cf965 | 1144 | else |
5f70619d | 1145 | dso->binary_type = DSO_BINARY_TYPE__KCORE; |
7e155d4d | 1146 | dso__set_long_name(dso, strdup(kcore_filename), true); |
8e0cf965 AH |
1147 | |
1148 | close(fd); | |
1149 | ||
1150 | if (map->type == MAP__FUNCTION) | |
1151 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1152 | else | |
1153 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1154 | ||
1155 | return 0; | |
1156 | ||
1157 | out_err: | |
1158 | while (!list_empty(&md.maps)) { | |
1159 | map = list_entry(md.maps.next, struct map, node); | |
1160 | list_del(&map->node); | |
1161 | map__delete(map); | |
1162 | } | |
1163 | close(fd); | |
1164 | return -EINVAL; | |
1165 | } | |
1166 | ||
d9b62aba AH |
1167 | /* |
1168 | * If the kernel is relocated at boot time, kallsyms won't match. Compute the | |
1169 | * delta based on the relocation reference symbol. | |
1170 | */ | |
1171 | static int kallsyms__delta(struct map *map, const char *filename, u64 *delta) | |
1172 | { | |
1173 | struct kmap *kmap = map__kmap(map); | |
1174 | u64 addr; | |
1175 | ||
1176 | if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) | |
1177 | return 0; | |
1178 | ||
1179 | addr = kallsyms__get_function_start(filename, | |
1180 | kmap->ref_reloc_sym->name); | |
1181 | if (!addr) | |
1182 | return -1; | |
1183 | ||
1184 | *delta = addr - kmap->ref_reloc_sym->addr; | |
1185 | return 0; | |
1186 | } | |
1187 | ||
aeafcbaf | 1188 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1189 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1190 | { |
d9b62aba AH |
1191 | u64 delta = 0; |
1192 | ||
ec80fde7 ACM |
1193 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1194 | return -1; | |
1195 | ||
aeafcbaf | 1196 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1197 | return -1; |
1198 | ||
d9b62aba AH |
1199 | if (kallsyms__delta(map, filename, &delta)) |
1200 | return -1; | |
1201 | ||
694bf407 | 1202 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1203 | symbols__fixup_end(&dso->symbols[map->type]); |
1204 | ||
aeafcbaf | 1205 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1206 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1207 | else |
44f24cb3 | 1208 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1209 | |
8e0cf965 AH |
1210 | if (!dso__load_kcore(dso, map, filename)) |
1211 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1212 | else | |
d9b62aba | 1213 | return dso__split_kallsyms(dso, map, delta, filter); |
af427bf5 ACM |
1214 | } |
1215 | ||
aeafcbaf | 1216 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1217 | symbol_filter_t filter) |
80d496be PE |
1218 | { |
1219 | char *line = NULL; | |
1220 | size_t n; | |
1221 | FILE *file; | |
1222 | int nr_syms = 0; | |
1223 | ||
aeafcbaf | 1224 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1225 | if (file == NULL) |
1226 | goto out_failure; | |
1227 | ||
1228 | while (!feof(file)) { | |
9cffa8d5 | 1229 | u64 start, size; |
80d496be PE |
1230 | struct symbol *sym; |
1231 | int line_len, len; | |
1232 | ||
1233 | line_len = getline(&line, &n, file); | |
1234 | if (line_len < 0) | |
1235 | break; | |
1236 | ||
1237 | if (!line) | |
1238 | goto out_failure; | |
1239 | ||
1240 | line[--line_len] = '\0'; /* \n */ | |
1241 | ||
1242 | len = hex2u64(line, &start); | |
1243 | ||
1244 | len++; | |
1245 | if (len + 2 >= line_len) | |
1246 | continue; | |
1247 | ||
1248 | len += hex2u64(line + len, &size); | |
1249 | ||
1250 | len++; | |
1251 | if (len + 2 >= line_len) | |
1252 | continue; | |
1253 | ||
c408fedf | 1254 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1255 | |
1256 | if (sym == NULL) | |
1257 | goto out_delete_line; | |
1258 | ||
439d473b | 1259 | if (filter && filter(map, sym)) |
00a192b3 | 1260 | symbol__delete(sym); |
80d496be | 1261 | else { |
aeafcbaf | 1262 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1263 | nr_syms++; |
1264 | } | |
1265 | } | |
1266 | ||
1267 | free(line); | |
1268 | fclose(file); | |
1269 | ||
1270 | return nr_syms; | |
1271 | ||
1272 | out_delete_line: | |
1273 | free(line); | |
1274 | out_failure: | |
1275 | return -1; | |
1276 | } | |
1277 | ||
1029f9fe NK |
1278 | static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, |
1279 | enum dso_binary_type type) | |
1280 | { | |
1281 | switch (type) { | |
1282 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1283 | case DSO_BINARY_TYPE__DEBUGLINK: | |
1284 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1285 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1286 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1287 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1288 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: | |
1289 | return !kmod && dso->kernel == DSO_TYPE_USER; | |
1290 | ||
1291 | case DSO_BINARY_TYPE__KALLSYMS: | |
1292 | case DSO_BINARY_TYPE__VMLINUX: | |
1293 | case DSO_BINARY_TYPE__KCORE: | |
1294 | return dso->kernel == DSO_TYPE_KERNEL; | |
1295 | ||
1296 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1297 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
1298 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
1299 | return dso->kernel == DSO_TYPE_GUEST_KERNEL; | |
1300 | ||
1301 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
1302 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
1303 | /* | |
1304 | * kernel modules know their symtab type - it's set when | |
1305 | * creating a module dso in machine__new_module(). | |
1306 | */ | |
1307 | return kmod && dso->symtab_type == type; | |
1308 | ||
1309 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1310 | return true; | |
1311 | ||
1312 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1313 | default: | |
1314 | return false; | |
1315 | } | |
1316 | } | |
1317 | ||
aeafcbaf | 1318 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1319 | { |
c338aee8 | 1320 | char *name; |
a2928c42 | 1321 | int ret = -1; |
44f24cb3 | 1322 | u_int i; |
23346f21 | 1323 | struct machine *machine; |
44f24cb3 | 1324 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1325 | int ss_pos = 0; |
1326 | struct symsrc ss_[2]; | |
1327 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
1029f9fe | 1328 | bool kmod; |
a2928c42 | 1329 | |
aeafcbaf | 1330 | dso__set_loaded(dso, map->type); |
66bd8424 | 1331 | |
aeafcbaf ACM |
1332 | if (dso->kernel == DSO_TYPE_KERNEL) |
1333 | return dso__load_kernel_sym(dso, map, filter); | |
1334 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1335 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1336 | |
23346f21 ACM |
1337 | if (map->groups && map->groups->machine) |
1338 | machine = map->groups->machine; | |
a1645ce1 | 1339 | else |
23346f21 | 1340 | machine = NULL; |
c338aee8 | 1341 | |
aeafcbaf | 1342 | dso->adjust_symbols = 0; |
f5812a7a | 1343 | |
aeafcbaf | 1344 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1345 | struct stat st; |
1346 | ||
e9b52ef2 | 1347 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1348 | return -1; |
1349 | ||
1350 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1351 | pr_warning("File %s not owned by current user or root, " | |
1352 | "ignoring it.\n", dso->name); | |
1353 | return -1; | |
1354 | } | |
1355 | ||
aeafcbaf | 1356 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1357 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1358 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1359 | return ret; |
1360 | } | |
1361 | ||
44f24cb3 JO |
1362 | if (machine) |
1363 | root_dir = machine->root_dir; | |
1364 | ||
164c800e DA |
1365 | name = malloc(PATH_MAX); |
1366 | if (!name) | |
1367 | return -1; | |
1368 | ||
1029f9fe NK |
1369 | kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || |
1370 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1371 | ||
1372 | /* | |
1373 | * Iterate over candidate debug images. | |
3aafe5ae CS |
1374 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1375 | * and/or opd section) for processing. | |
6da80ce8 | 1376 | */ |
44f24cb3 | 1377 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1378 | struct symsrc *ss = &ss_[ss_pos]; |
1379 | bool next_slot = false; | |
6da80ce8 | 1380 | |
005f9294 | 1381 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1382 | |
1029f9fe NK |
1383 | if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type)) |
1384 | continue; | |
1385 | ||
ee4e9625 ACM |
1386 | if (dso__read_binary_type_filename(dso, symtab_type, |
1387 | root_dir, name, PATH_MAX)) | |
44f24cb3 | 1388 | continue; |
6da80ce8 DM |
1389 | |
1390 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1391 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1392 | continue; |
a2928c42 | 1393 | |
3aafe5ae CS |
1394 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1395 | syms_ss = ss; | |
1396 | next_slot = true; | |
0058aef6 AH |
1397 | if (!dso->symsrc_filename) |
1398 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1399 | } |
1400 | ||
3aafe5ae CS |
1401 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1402 | runtime_ss = ss; | |
1403 | next_slot = true; | |
a44f605b | 1404 | } |
a2928c42 | 1405 | |
3aafe5ae CS |
1406 | if (next_slot) { |
1407 | ss_pos++; | |
33ff581e | 1408 | |
3aafe5ae CS |
1409 | if (syms_ss && runtime_ss) |
1410 | break; | |
98e9f03b NK |
1411 | } else { |
1412 | symsrc__destroy(ss); | |
6da80ce8 | 1413 | } |
3aafe5ae | 1414 | |
a25e46c4 | 1415 | } |
6da80ce8 | 1416 | |
3aafe5ae CS |
1417 | if (!runtime_ss && !syms_ss) |
1418 | goto out_free; | |
1419 | ||
1420 | if (runtime_ss && !syms_ss) { | |
1421 | syms_ss = runtime_ss; | |
1422 | } | |
1423 | ||
1424 | /* We'll have to hope for the best */ | |
1425 | if (!runtime_ss && syms_ss) | |
1426 | runtime_ss = syms_ss; | |
1427 | ||
1029f9fe NK |
1428 | if (syms_ss) |
1429 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod); | |
1430 | else | |
3aafe5ae CS |
1431 | ret = -1; |
1432 | ||
f47b58b7 | 1433 | if (ret > 0) { |
3aafe5ae CS |
1434 | int nr_plt; |
1435 | ||
1436 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1437 | if (nr_plt > 0) | |
1438 | ret += nr_plt; | |
60e4b10c ACM |
1439 | } |
1440 | ||
3aafe5ae CS |
1441 | for (; ss_pos > 0; ss_pos--) |
1442 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1443 | out_free: | |
a2928c42 | 1444 | free(name); |
aeafcbaf | 1445 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1446 | return 0; |
a2928c42 ACM |
1447 | return ret; |
1448 | } | |
1449 | ||
aeafcbaf | 1450 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1451 | enum map_type type, const char *name) |
439d473b ACM |
1452 | { |
1453 | struct rb_node *nd; | |
1454 | ||
aeafcbaf | 1455 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1456 | struct map *map = rb_entry(nd, struct map, rb_node); |
1457 | ||
b7cece76 | 1458 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1459 | return map; |
1460 | } | |
1461 | ||
1462 | return NULL; | |
1463 | } | |
1464 | ||
aeafcbaf | 1465 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1466 | const char *vmlinux, bool vmlinux_allocated, |
1467 | symbol_filter_t filter) | |
a2928c42 | 1468 | { |
b68e2f91 CS |
1469 | int err = -1; |
1470 | struct symsrc ss; | |
ec5761ea | 1471 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1472 | enum dso_binary_type symtab_type; |
a2928c42 | 1473 | |
5698d2c9 NK |
1474 | if (vmlinux[0] == '/') |
1475 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1476 | else | |
972f393b | 1477 | symbol__join_symfs(symfs_vmlinux, vmlinux); |
a2928c42 | 1478 | |
21ea4539 | 1479 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1480 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1481 | else |
005f9294 | 1482 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1483 | |
005f9294 | 1484 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1485 | return -1; |
1486 | ||
261360b6 | 1487 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1488 | symsrc__destroy(&ss); |
a2928c42 | 1489 | |
515850e4 | 1490 | if (err > 0) { |
39b12f78 | 1491 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
5f70619d | 1492 | dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
39b12f78 | 1493 | else |
5f70619d | 1494 | dso->binary_type = DSO_BINARY_TYPE__VMLINUX; |
bf4414ae | 1495 | dso__set_long_name(dso, vmlinux, vmlinux_allocated); |
515850e4 | 1496 | dso__set_loaded(dso, map->type); |
ec5761ea | 1497 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1498 | } |
3846df2e | 1499 | |
a2928c42 ACM |
1500 | return err; |
1501 | } | |
1502 | ||
aeafcbaf | 1503 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1504 | symbol_filter_t filter) |
a19afe46 ACM |
1505 | { |
1506 | int i, err = 0; | |
5ad90e4e | 1507 | char *filename; |
a19afe46 ACM |
1508 | |
1509 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1510 | vmlinux_path__nr_entries + 1); |
1511 | ||
aeafcbaf | 1512 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1513 | if (filename != NULL) { |
5230fb7d ACM |
1514 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1515 | if (err > 0) | |
5ad90e4e | 1516 | goto out; |
5ad90e4e ACM |
1517 | free(filename); |
1518 | } | |
a19afe46 ACM |
1519 | |
1520 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
5230fb7d ACM |
1521 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); |
1522 | if (err > 0) | |
a19afe46 | 1523 | break; |
a19afe46 | 1524 | } |
5ad90e4e | 1525 | out: |
a19afe46 ACM |
1526 | return err; |
1527 | } | |
1528 | ||
0544d422 AH |
1529 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1530 | { | |
1531 | char kallsyms_filename[PATH_MAX]; | |
1532 | struct dirent *dent; | |
1533 | int ret = -1; | |
1534 | DIR *d; | |
1535 | ||
1536 | d = opendir(dir); | |
1537 | if (!d) | |
1538 | return -1; | |
1539 | ||
1540 | while (1) { | |
1541 | dent = readdir(d); | |
1542 | if (!dent) | |
1543 | break; | |
1544 | if (dent->d_type != DT_DIR) | |
1545 | continue; | |
1546 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1547 | "%s/%s/kallsyms", dir, dent->d_name); | |
a00d28cb | 1548 | if (!validate_kcore_addresses(kallsyms_filename, map)) { |
0544d422 AH |
1549 | strlcpy(dir, kallsyms_filename, dir_sz); |
1550 | ret = 0; | |
1551 | break; | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | closedir(d); | |
1556 | ||
1557 | return ret; | |
1558 | } | |
1559 | ||
1560 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1561 | { | |
1562 | u8 host_build_id[BUILD_ID_SIZE]; | |
1563 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1564 | bool is_host = false; | |
1565 | char path[PATH_MAX]; | |
1566 | ||
1567 | if (!dso->has_build_id) { | |
1568 | /* | |
1569 | * Last resort, if we don't have a build-id and couldn't find | |
1570 | * any vmlinux file, try the running kernel kallsyms table. | |
1571 | */ | |
1572 | goto proc_kallsyms; | |
1573 | } | |
1574 | ||
1575 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1576 | sizeof(host_build_id)) == 0) | |
1577 | is_host = dso__build_id_equal(dso, host_build_id); | |
1578 | ||
1579 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1580 | ||
449867e3 AH |
1581 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1582 | sbuild_id); | |
1583 | ||
0544d422 AH |
1584 | /* Use /proc/kallsyms if possible */ |
1585 | if (is_host) { | |
1586 | DIR *d; | |
1587 | int fd; | |
1588 | ||
1589 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1590 | d = opendir(path); |
1591 | if (!d) | |
1592 | goto proc_kallsyms; | |
1593 | closedir(d); | |
1594 | ||
1595 | /* | |
1596 | * Do not check the build-id cache, until we know we cannot use | |
1597 | * /proc/kcore. | |
1598 | */ | |
1599 | fd = open("/proc/kcore", O_RDONLY); | |
1600 | if (fd != -1) { | |
1601 | close(fd); | |
1602 | /* If module maps match go with /proc/kallsyms */ | |
a00d28cb | 1603 | if (!validate_kcore_addresses("/proc/kallsyms", map)) |
0544d422 AH |
1604 | goto proc_kallsyms; |
1605 | } | |
1606 | ||
1607 | /* Find kallsyms in build-id cache with kcore */ | |
1608 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1609 | return strdup(path); | |
1610 | ||
1611 | goto proc_kallsyms; | |
1612 | } | |
1613 | ||
449867e3 AH |
1614 | /* Find kallsyms in build-id cache with kcore */ |
1615 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1616 | return strdup(path); | |
1617 | ||
0544d422 AH |
1618 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1619 | buildid_dir, sbuild_id); | |
1620 | ||
1621 | if (access(path, F_OK)) { | |
1622 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1623 | sbuild_id); | |
1624 | return NULL; | |
1625 | } | |
1626 | ||
1627 | return strdup(path); | |
1628 | ||
1629 | proc_kallsyms: | |
1630 | return strdup("/proc/kallsyms"); | |
1631 | } | |
1632 | ||
aeafcbaf | 1633 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1634 | symbol_filter_t filter) |
a827c875 | 1635 | { |
cc612d81 | 1636 | int err; |
9e201442 ACM |
1637 | const char *kallsyms_filename = NULL; |
1638 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1639 | /* |
b226a5a7 DA |
1640 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1641 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1642 | * |
1643 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1644 | * build-id, or if the user specifies the wrong path to the right | |
1645 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1646 | * x86_86 one, on the machine where analysis is being performed, say), | |
1647 | * or worse, /proc/kallsyms. | |
1648 | * | |
1649 | * If the specified file _has_ a build-id and there is a build-id | |
1650 | * section in the perf.data file, we will still do the expected | |
1651 | * validation in dso__load_vmlinux and will bail out if they don't | |
1652 | * match. | |
1653 | */ | |
b226a5a7 DA |
1654 | if (symbol_conf.kallsyms_name != NULL) { |
1655 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1656 | goto do_kallsyms; | |
1657 | } | |
1658 | ||
fc2be696 | 1659 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1660 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1661 | false, filter); | |
dc8d6ab2 | 1662 | } |
cc612d81 | 1663 | |
fc2be696 | 1664 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1665 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1666 | if (err > 0) |
39b12f78 | 1667 | return err; |
cc612d81 ACM |
1668 | } |
1669 | ||
ec5761ea DA |
1670 | /* do not try local files if a symfs was given */ |
1671 | if (symbol_conf.symfs[0] != 0) | |
1672 | return -1; | |
1673 | ||
0544d422 AH |
1674 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1675 | if (!kallsyms_allocated_filename) | |
1676 | return -1; | |
19fc2ded | 1677 | |
0544d422 | 1678 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1679 | |
cc612d81 | 1680 | do_kallsyms: |
aeafcbaf | 1681 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1682 | if (err > 0) |
1683 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1684 | free(kallsyms_allocated_filename); |
439d473b | 1685 | |
8e0cf965 | 1686 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1687 | dso->binary_type = DSO_BINARY_TYPE__KALLSYMS; |
bf4414ae | 1688 | dso__set_long_name(dso, "[kernel.kallsyms]", false); |
6a4694a4 ACM |
1689 | map__fixup_start(map); |
1690 | map__fixup_end(map); | |
439d473b | 1691 | } |
94cb9e38 | 1692 | |
a827c875 ACM |
1693 | return err; |
1694 | } | |
1695 | ||
aeafcbaf ACM |
1696 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1697 | symbol_filter_t filter) | |
a1645ce1 ZY |
1698 | { |
1699 | int err; | |
1700 | const char *kallsyms_filename = NULL; | |
23346f21 | 1701 | struct machine *machine; |
a1645ce1 ZY |
1702 | char path[PATH_MAX]; |
1703 | ||
1704 | if (!map->groups) { | |
1705 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1706 | return -1; | |
1707 | } | |
23346f21 | 1708 | machine = map->groups->machine; |
a1645ce1 | 1709 | |
23346f21 | 1710 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1711 | /* |
1712 | * if the user specified a vmlinux filename, use it and only | |
1713 | * it, reporting errors to the user if it cannot be used. | |
1714 | * Or use file guest_kallsyms inputted by user on commandline | |
1715 | */ | |
1716 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1717 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1718 | symbol_conf.default_guest_vmlinux_name, |
1719 | false, filter); | |
39b12f78 | 1720 | return err; |
a1645ce1 ZY |
1721 | } |
1722 | ||
1723 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1724 | if (!kallsyms_filename) | |
1725 | return -1; | |
1726 | } else { | |
23346f21 | 1727 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1728 | kallsyms_filename = path; |
1729 | } | |
1730 | ||
aeafcbaf | 1731 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1732 | if (err > 0) |
39b12f78 | 1733 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1734 | if (err > 0 && !dso__is_kcore(dso)) { |
bdac0bcf | 1735 | dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
39b12f78 | 1736 | machine__mmap_name(machine, path, sizeof(path)); |
7e155d4d | 1737 | dso__set_long_name(dso, strdup(path), true); |
a1645ce1 ZY |
1738 | map__fixup_start(map); |
1739 | map__fixup_end(map); | |
1740 | } | |
1741 | ||
1742 | return err; | |
1743 | } | |
cd84c2ac | 1744 | |
cc612d81 ACM |
1745 | static void vmlinux_path__exit(void) |
1746 | { | |
04662523 ACM |
1747 | while (--vmlinux_path__nr_entries >= 0) |
1748 | zfree(&vmlinux_path[vmlinux_path__nr_entries]); | |
cc612d81 | 1749 | |
04662523 | 1750 | zfree(&vmlinux_path); |
cc612d81 ACM |
1751 | } |
1752 | ||
0a7e6d1b | 1753 | static int vmlinux_path__init(struct perf_session_env *env) |
cc612d81 ACM |
1754 | { |
1755 | struct utsname uts; | |
1756 | char bf[PATH_MAX]; | |
0a7e6d1b | 1757 | char *kernel_version; |
cc612d81 | 1758 | |
cc612d81 ACM |
1759 | vmlinux_path = malloc(sizeof(char *) * 5); |
1760 | if (vmlinux_path == NULL) | |
1761 | return -1; | |
1762 | ||
1763 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1764 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1765 | goto out_fail; | |
1766 | ++vmlinux_path__nr_entries; | |
1767 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1768 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1769 | goto out_fail; | |
1770 | ++vmlinux_path__nr_entries; | |
ec5761ea | 1771 | |
0a7e6d1b | 1772 | /* only try kernel version if no symfs was given */ |
ec5761ea DA |
1773 | if (symbol_conf.symfs[0] != 0) |
1774 | return 0; | |
1775 | ||
0a7e6d1b NK |
1776 | if (env) { |
1777 | kernel_version = env->os_release; | |
1778 | } else { | |
1779 | if (uname(&uts) < 0) | |
1780 | goto out_fail; | |
1781 | ||
1782 | kernel_version = uts.release; | |
1783 | } | |
ec5761ea | 1784 | |
0a7e6d1b | 1785 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", kernel_version); |
cc612d81 ACM |
1786 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1787 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1788 | goto out_fail; | |
1789 | ++vmlinux_path__nr_entries; | |
0a7e6d1b | 1790 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", kernel_version); |
cc612d81 ACM |
1791 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1792 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1793 | goto out_fail; | |
1794 | ++vmlinux_path__nr_entries; | |
1795 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
0a7e6d1b | 1796 | kernel_version); |
cc612d81 ACM |
1797 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); |
1798 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1799 | goto out_fail; | |
1800 | ++vmlinux_path__nr_entries; | |
1801 | ||
1802 | return 0; | |
1803 | ||
1804 | out_fail: | |
1805 | vmlinux_path__exit(); | |
1806 | return -1; | |
1807 | } | |
1808 | ||
3bfe5f81 | 1809 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1810 | const char *list_name) |
1811 | { | |
1812 | if (list_str == NULL) | |
1813 | return 0; | |
1814 | ||
1815 | *list = strlist__new(true, list_str); | |
1816 | if (!*list) { | |
1817 | pr_err("problems parsing %s list\n", list_name); | |
1818 | return -1; | |
1819 | } | |
1820 | return 0; | |
1821 | } | |
1822 | ||
ec80fde7 ACM |
1823 | static bool symbol__read_kptr_restrict(void) |
1824 | { | |
1825 | bool value = false; | |
1826 | ||
1827 | if (geteuid() != 0) { | |
1828 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1829 | if (fp != NULL) { | |
1830 | char line[8]; | |
1831 | ||
1832 | if (fgets(line, sizeof(line), fp) != NULL) | |
1833 | value = atoi(line) != 0; | |
1834 | ||
1835 | fclose(fp); | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | return value; | |
1840 | } | |
1841 | ||
0a7e6d1b | 1842 | int symbol__init(struct perf_session_env *env) |
2446042c | 1843 | { |
ec5761ea DA |
1844 | const char *symfs; |
1845 | ||
85e00b55 JZ |
1846 | if (symbol_conf.initialized) |
1847 | return 0; | |
1848 | ||
9ac3e487 | 1849 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1850 | |
166ccc9c NK |
1851 | symbol__elf_init(); |
1852 | ||
75be6cf4 ACM |
1853 | if (symbol_conf.sort_by_name) |
1854 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1855 | sizeof(struct symbol)); | |
b32d133a | 1856 | |
0a7e6d1b | 1857 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0) |
2446042c ACM |
1858 | return -1; |
1859 | ||
c410a338 ACM |
1860 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1861 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1862 | return -1; | |
1863 | } | |
1864 | ||
655000e7 ACM |
1865 | if (setup_list(&symbol_conf.dso_list, |
1866 | symbol_conf.dso_list_str, "dso") < 0) | |
1867 | return -1; | |
1868 | ||
1869 | if (setup_list(&symbol_conf.comm_list, | |
1870 | symbol_conf.comm_list_str, "comm") < 0) | |
1871 | goto out_free_dso_list; | |
1872 | ||
1873 | if (setup_list(&symbol_conf.sym_list, | |
1874 | symbol_conf.sym_list_str, "symbol") < 0) | |
1875 | goto out_free_comm_list; | |
1876 | ||
ec5761ea DA |
1877 | /* |
1878 | * A path to symbols of "/" is identical to "" | |
1879 | * reset here for simplicity. | |
1880 | */ | |
1881 | symfs = realpath(symbol_conf.symfs, NULL); | |
1882 | if (symfs == NULL) | |
1883 | symfs = symbol_conf.symfs; | |
1884 | if (strcmp(symfs, "/") == 0) | |
1885 | symbol_conf.symfs = ""; | |
1886 | if (symfs != symbol_conf.symfs) | |
1887 | free((void *)symfs); | |
1888 | ||
ec80fde7 ACM |
1889 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
1890 | ||
85e00b55 | 1891 | symbol_conf.initialized = true; |
4aa65636 | 1892 | return 0; |
655000e7 | 1893 | |
655000e7 ACM |
1894 | out_free_comm_list: |
1895 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
1896 | out_free_dso_list: |
1897 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 1898 | return -1; |
4aa65636 ACM |
1899 | } |
1900 | ||
d65a458b ACM |
1901 | void symbol__exit(void) |
1902 | { | |
85e00b55 JZ |
1903 | if (!symbol_conf.initialized) |
1904 | return; | |
d65a458b ACM |
1905 | strlist__delete(symbol_conf.sym_list); |
1906 | strlist__delete(symbol_conf.dso_list); | |
1907 | strlist__delete(symbol_conf.comm_list); | |
1908 | vmlinux_path__exit(); | |
1909 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 1910 | symbol_conf.initialized = false; |
d65a458b | 1911 | } |