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" |
a2928c42 | 18 | |
a2928c42 | 19 | #include <elf.h> |
f1617b40 | 20 | #include <limits.h> |
439d473b | 21 | #include <sys/utsname.h> |
2cdbc46d | 22 | |
3b01a413 | 23 | #ifndef KSYM_NAME_LEN |
c752d040 | 24 | #define KSYM_NAME_LEN 256 |
3b01a413 ACM |
25 | #endif |
26 | ||
aeafcbaf | 27 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 28 | symbol_filter_t filter); |
aeafcbaf | 29 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 30 | symbol_filter_t filter); |
3f067dca ACM |
31 | int vmlinux_path__nr_entries; |
32 | char **vmlinux_path; | |
439d473b | 33 | |
75be6cf4 | 34 | struct symbol_conf symbol_conf = { |
b32d133a ACM |
35 | .use_modules = true, |
36 | .try_vmlinux_path = true, | |
3e6a2a7f | 37 | .annotate_src = true, |
328ccdac | 38 | .demangle = true, |
ec5761ea | 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 | ||
79406cd7 ACM |
346 | struct symbol_name_rb_node { |
347 | struct rb_node rb_node; | |
348 | struct symbol sym; | |
349 | }; | |
350 | ||
aeafcbaf | 351 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 352 | { |
aeafcbaf | 353 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 354 | struct rb_node *parent = NULL; |
02a9d037 RV |
355 | struct symbol_name_rb_node *symn, *s; |
356 | ||
357 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
358 | |
359 | while (*p != NULL) { | |
360 | parent = *p; | |
361 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
362 | if (strcmp(sym->name, s->sym.name) < 0) | |
363 | p = &(*p)->rb_left; | |
364 | else | |
365 | p = &(*p)->rb_right; | |
366 | } | |
367 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 368 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
369 | } |
370 | ||
aeafcbaf ACM |
371 | static void symbols__sort_by_name(struct rb_root *symbols, |
372 | struct rb_root *source) | |
79406cd7 ACM |
373 | { |
374 | struct rb_node *nd; | |
375 | ||
376 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
377 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 378 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
379 | } |
380 | } | |
381 | ||
aeafcbaf ACM |
382 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
383 | const char *name) | |
79406cd7 ACM |
384 | { |
385 | struct rb_node *n; | |
386 | ||
aeafcbaf | 387 | if (symbols == NULL) |
79406cd7 ACM |
388 | return NULL; |
389 | ||
aeafcbaf | 390 | n = symbols->rb_node; |
79406cd7 ACM |
391 | |
392 | while (n) { | |
393 | struct symbol_name_rb_node *s; | |
394 | int cmp; | |
395 | ||
396 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
397 | cmp = strcmp(name, s->sym.name); | |
398 | ||
399 | if (cmp < 0) | |
400 | n = n->rb_left; | |
401 | else if (cmp > 0) | |
402 | n = n->rb_right; | |
403 | else | |
404 | return &s->sym; | |
405 | } | |
406 | ||
407 | return NULL; | |
408 | } | |
409 | ||
aeafcbaf | 410 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 411 | enum map_type type, u64 addr) |
fcf1203a | 412 | { |
aeafcbaf | 413 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
414 | } |
415 | ||
8e0cf965 AH |
416 | struct symbol *dso__first_symbol(struct dso *dso, enum map_type type) |
417 | { | |
418 | return symbols__first(&dso->symbols[type]); | |
419 | } | |
420 | ||
aeafcbaf | 421 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
422 | const char *name) |
423 | { | |
aeafcbaf | 424 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
425 | } |
426 | ||
aeafcbaf | 427 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 428 | { |
aeafcbaf ACM |
429 | dso__set_sorted_by_name(dso, type); |
430 | return symbols__sort_by_name(&dso->symbol_names[type], | |
431 | &dso->symbols[type]); | |
79406cd7 ACM |
432 | } |
433 | ||
aeafcbaf ACM |
434 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
435 | enum map_type type, FILE *fp) | |
90f18e63 SD |
436 | { |
437 | size_t ret = 0; | |
438 | struct rb_node *nd; | |
439 | struct symbol_name_rb_node *pos; | |
440 | ||
aeafcbaf | 441 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
442 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
443 | fprintf(fp, "%s\n", pos->sym.name); | |
444 | } | |
445 | ||
446 | return ret; | |
447 | } | |
448 | ||
9e201442 ACM |
449 | int kallsyms__parse(const char *filename, void *arg, |
450 | int (*process_symbol)(void *arg, const char *name, | |
82151520 | 451 | char type, u64 start)) |
a2928c42 | 452 | { |
a2928c42 ACM |
453 | char *line = NULL; |
454 | size_t n; | |
3b01a413 | 455 | int err = -1; |
9e201442 | 456 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
457 | |
458 | if (file == NULL) | |
459 | goto out_failure; | |
460 | ||
3b01a413 ACM |
461 | err = 0; |
462 | ||
a2928c42 | 463 | while (!feof(file)) { |
9cffa8d5 | 464 | u64 start; |
a2928c42 ACM |
465 | int line_len, len; |
466 | char symbol_type; | |
2e538c4a | 467 | char *symbol_name; |
a2928c42 ACM |
468 | |
469 | line_len = getline(&line, &n, file); | |
a1645ce1 | 470 | if (line_len < 0 || !line) |
a2928c42 ACM |
471 | break; |
472 | ||
a2928c42 ACM |
473 | line[--line_len] = '\0'; /* \n */ |
474 | ||
a0055ae2 | 475 | len = hex2u64(line, &start); |
a2928c42 ACM |
476 | |
477 | len++; | |
478 | if (len + 2 >= line_len) | |
479 | continue; | |
480 | ||
31877908 | 481 | symbol_type = line[len]; |
3b01a413 ACM |
482 | len += 2; |
483 | symbol_name = line + len; | |
484 | len = line_len - len; | |
682b335a | 485 | |
3b01a413 ACM |
486 | if (len >= KSYM_NAME_LEN) { |
487 | err = -1; | |
682b335a | 488 | break; |
3b01a413 ACM |
489 | } |
490 | ||
3f5a4272 | 491 | err = process_symbol(arg, symbol_name, |
82151520 | 492 | symbol_type, start); |
3f5a4272 AB |
493 | if (err) |
494 | break; | |
2e538c4a ACM |
495 | } |
496 | ||
497 | free(line); | |
498 | fclose(file); | |
682b335a | 499 | return err; |
2e538c4a | 500 | |
2e538c4a ACM |
501 | out_failure: |
502 | return -1; | |
503 | } | |
504 | ||
316d70d6 AH |
505 | int modules__parse(const char *filename, void *arg, |
506 | int (*process_module)(void *arg, const char *name, | |
507 | u64 start)) | |
508 | { | |
509 | char *line = NULL; | |
510 | size_t n; | |
511 | FILE *file; | |
512 | int err = 0; | |
513 | ||
514 | file = fopen(filename, "r"); | |
515 | if (file == NULL) | |
516 | return -1; | |
517 | ||
518 | while (1) { | |
519 | char name[PATH_MAX]; | |
520 | u64 start; | |
521 | char *sep; | |
522 | ssize_t line_len; | |
523 | ||
524 | line_len = getline(&line, &n, file); | |
525 | if (line_len < 0) { | |
526 | if (feof(file)) | |
527 | break; | |
528 | err = -1; | |
529 | goto out; | |
530 | } | |
531 | ||
532 | if (!line) { | |
533 | err = -1; | |
534 | goto out; | |
535 | } | |
536 | ||
537 | line[--line_len] = '\0'; /* \n */ | |
538 | ||
539 | sep = strrchr(line, 'x'); | |
540 | if (sep == NULL) | |
541 | continue; | |
542 | ||
543 | hex2u64(sep + 1, &start); | |
544 | ||
545 | sep = strchr(line, ' '); | |
546 | if (sep == NULL) | |
547 | continue; | |
548 | ||
549 | *sep = '\0'; | |
550 | ||
551 | scnprintf(name, sizeof(name), "[%s]", line); | |
552 | ||
553 | err = process_module(arg, name, start); | |
554 | if (err) | |
555 | break; | |
556 | } | |
557 | out: | |
558 | free(line); | |
559 | fclose(file); | |
560 | return err; | |
561 | } | |
562 | ||
682b335a ACM |
563 | struct process_kallsyms_args { |
564 | struct map *map; | |
565 | struct dso *dso; | |
566 | }; | |
567 | ||
c408fedf ACM |
568 | static u8 kallsyms2elf_type(char type) |
569 | { | |
570 | if (type == 'W') | |
571 | return STB_WEAK; | |
572 | ||
573 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
574 | } | |
575 | ||
82d1deb0 DA |
576 | bool symbol__is_idle(struct symbol *sym) |
577 | { | |
578 | const char * const idle_symbols[] = { | |
579 | "cpu_idle", | |
580 | "intel_idle", | |
581 | "default_idle", | |
582 | "native_safe_halt", | |
583 | "enter_idle", | |
584 | "exit_idle", | |
585 | "mwait_idle", | |
586 | "mwait_idle_with_hints", | |
587 | "poll_idle", | |
588 | "ppc64_runlatch_off", | |
589 | "pseries_dedicated_idle_sleep", | |
590 | NULL | |
591 | }; | |
592 | ||
593 | int i; | |
594 | ||
595 | if (!sym) | |
596 | return false; | |
597 | ||
598 | for (i = 0; idle_symbols[i]; i++) { | |
599 | if (!strcmp(idle_symbols[i], sym->name)) | |
600 | return true; | |
601 | } | |
602 | ||
603 | return false; | |
604 | } | |
605 | ||
682b335a | 606 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 607 | char type, u64 start) |
682b335a ACM |
608 | { |
609 | struct symbol *sym; | |
610 | struct process_kallsyms_args *a = arg; | |
611 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
612 | ||
613 | if (!symbol_type__is_a(type, a->map->type)) | |
614 | return 0; | |
615 | ||
82151520 CS |
616 | /* |
617 | * module symbols are not sorted so we add all | |
618 | * symbols, setting length to 0, and rely on | |
619 | * symbols__fixup_end() to fix it up. | |
620 | */ | |
621 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
622 | if (sym == NULL) |
623 | return -ENOMEM; | |
624 | /* | |
625 | * We will pass the symbols to the filter later, in | |
626 | * map__split_kallsyms, when we have split the maps per module | |
627 | */ | |
628 | symbols__insert(root, sym); | |
a1645ce1 | 629 | |
682b335a ACM |
630 | return 0; |
631 | } | |
632 | ||
633 | /* | |
634 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
635 | * so that we can in the next step set the symbol ->end address and then | |
636 | * call kernel_maps__split_kallsyms. | |
637 | */ | |
aeafcbaf | 638 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 639 | struct map *map) |
682b335a | 640 | { |
aeafcbaf | 641 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 642 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
643 | } |
644 | ||
8e0cf965 AH |
645 | static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, |
646 | symbol_filter_t filter) | |
647 | { | |
648 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
649 | struct map *curr_map; | |
650 | struct symbol *pos; | |
651 | int count = 0, moved = 0; | |
652 | struct rb_root *root = &dso->symbols[map->type]; | |
653 | struct rb_node *next = rb_first(root); | |
654 | ||
655 | while (next) { | |
656 | char *module; | |
657 | ||
658 | pos = rb_entry(next, struct symbol, rb_node); | |
659 | next = rb_next(&pos->rb_node); | |
660 | ||
661 | module = strchr(pos->name, '\t'); | |
662 | if (module) | |
663 | *module = '\0'; | |
664 | ||
665 | curr_map = map_groups__find(kmaps, map->type, pos->start); | |
666 | ||
667 | if (!curr_map || (filter && filter(curr_map, pos))) { | |
668 | rb_erase(&pos->rb_node, root); | |
669 | symbol__delete(pos); | |
670 | } else { | |
671 | pos->start -= curr_map->start - curr_map->pgoff; | |
672 | if (pos->end) | |
673 | pos->end -= curr_map->start - curr_map->pgoff; | |
674 | if (curr_map != map) { | |
675 | rb_erase(&pos->rb_node, root); | |
676 | symbols__insert( | |
677 | &curr_map->dso->symbols[curr_map->type], | |
678 | pos); | |
679 | ++moved; | |
680 | } else { | |
681 | ++count; | |
682 | } | |
683 | } | |
684 | } | |
685 | ||
686 | /* Symbols have been adjusted */ | |
687 | dso->adjust_symbols = 1; | |
688 | ||
689 | return count + moved; | |
690 | } | |
691 | ||
2e538c4a ACM |
692 | /* |
693 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
694 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
695 | * the original ELF section names vmlinux have. | |
696 | */ | |
aeafcbaf | 697 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 698 | symbol_filter_t filter) |
2e538c4a | 699 | { |
9de89fe7 | 700 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 701 | struct machine *machine = kmaps->machine; |
4e06255f | 702 | struct map *curr_map = map; |
2e538c4a | 703 | struct symbol *pos; |
8a953312 | 704 | int count = 0, moved = 0; |
aeafcbaf | 705 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 706 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
707 | int kernel_range = 0; |
708 | ||
709 | while (next) { | |
710 | char *module; | |
711 | ||
712 | pos = rb_entry(next, struct symbol, rb_node); | |
713 | next = rb_next(&pos->rb_node); | |
714 | ||
715 | module = strchr(pos->name, '\t'); | |
716 | if (module) { | |
75be6cf4 | 717 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
718 | goto discard_symbol; |
719 | ||
2e538c4a ACM |
720 | *module++ = '\0'; |
721 | ||
b7cece76 | 722 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 723 | if (curr_map != map && |
aeafcbaf | 724 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 725 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
726 | /* |
727 | * We assume all symbols of a module are | |
728 | * continuous in * kallsyms, so curr_map | |
729 | * points to a module and all its | |
730 | * symbols are in its kmap. Mark it as | |
731 | * loaded. | |
732 | */ | |
733 | dso__set_loaded(curr_map->dso, | |
734 | curr_map->type); | |
735 | } | |
736 | ||
737 | curr_map = map_groups__find_by_name(kmaps, | |
738 | map->type, module); | |
4e06255f | 739 | if (curr_map == NULL) { |
2f51903b | 740 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 741 | "inconsistency while looking " |
a1645ce1 | 742 | "for \"%s\" module!\n", |
23346f21 | 743 | machine->root_dir, module); |
a1645ce1 ZY |
744 | curr_map = map; |
745 | goto discard_symbol; | |
af427bf5 | 746 | } |
b7cece76 | 747 | |
a1645ce1 | 748 | if (curr_map->dso->loaded && |
23346f21 | 749 | !machine__is_default_guest(machine)) |
b7cece76 | 750 | goto discard_symbol; |
af427bf5 | 751 | } |
2e538c4a ACM |
752 | /* |
753 | * So that we look just like we get from .ko files, | |
754 | * i.e. not prelinked, relative to map->start. | |
755 | */ | |
4e06255f ACM |
756 | pos->start = curr_map->map_ip(curr_map, pos->start); |
757 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
758 | } else if (curr_map != map) { | |
2e538c4a | 759 | char dso_name[PATH_MAX]; |
aeafcbaf | 760 | struct dso *ndso; |
2e538c4a | 761 | |
8a953312 ACM |
762 | if (count == 0) { |
763 | curr_map = map; | |
764 | goto filter_symbol; | |
765 | } | |
766 | ||
aeafcbaf | 767 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
768 | snprintf(dso_name, sizeof(dso_name), |
769 | "[guest.kernel].%d", | |
770 | kernel_range++); | |
771 | else | |
772 | snprintf(dso_name, sizeof(dso_name), | |
773 | "[kernel].%d", | |
774 | kernel_range++); | |
2e538c4a | 775 | |
aeafcbaf ACM |
776 | ndso = dso__new(dso_name); |
777 | if (ndso == NULL) | |
2e538c4a ACM |
778 | return -1; |
779 | ||
aeafcbaf | 780 | ndso->kernel = dso->kernel; |
a1645ce1 | 781 | |
aeafcbaf | 782 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 783 | if (curr_map == NULL) { |
aeafcbaf | 784 | dso__delete(ndso); |
2e538c4a ACM |
785 | return -1; |
786 | } | |
a2928c42 | 787 | |
4e06255f | 788 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 789 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
790 | ++kernel_range; |
791 | } | |
8a953312 | 792 | filter_symbol: |
4e06255f | 793 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 794 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 795 | symbol__delete(pos); |
2e538c4a | 796 | } else { |
4e06255f ACM |
797 | if (curr_map != map) { |
798 | rb_erase(&pos->rb_node, root); | |
799 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
800 | ++moved; |
801 | } else | |
802 | ++count; | |
9974f496 | 803 | } |
a2928c42 ACM |
804 | } |
805 | ||
a1645ce1 | 806 | if (curr_map != map && |
aeafcbaf | 807 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 808 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
809 | dso__set_loaded(curr_map->dso, curr_map->type); |
810 | } | |
811 | ||
8a953312 | 812 | return count + moved; |
2e538c4a | 813 | } |
a2928c42 | 814 | |
3f067dca ACM |
815 | bool symbol__restricted_filename(const char *filename, |
816 | const char *restricted_filename) | |
ec80fde7 ACM |
817 | { |
818 | bool restricted = false; | |
819 | ||
820 | if (symbol_conf.kptr_restrict) { | |
821 | char *r = realpath(filename, NULL); | |
822 | ||
823 | if (r != NULL) { | |
824 | restricted = strcmp(r, restricted_filename) == 0; | |
825 | free(r); | |
826 | return restricted; | |
827 | } | |
828 | } | |
829 | ||
830 | return restricted; | |
831 | } | |
832 | ||
52afdaf9 AH |
833 | struct module_info { |
834 | struct rb_node rb_node; | |
835 | char *name; | |
836 | u64 start; | |
8e0cf965 AH |
837 | }; |
838 | ||
52afdaf9 | 839 | static void add_module(struct module_info *mi, struct rb_root *modules) |
8e0cf965 | 840 | { |
52afdaf9 AH |
841 | struct rb_node **p = &modules->rb_node; |
842 | struct rb_node *parent = NULL; | |
843 | struct module_info *m; | |
8e0cf965 | 844 | |
52afdaf9 AH |
845 | while (*p != NULL) { |
846 | parent = *p; | |
847 | m = rb_entry(parent, struct module_info, rb_node); | |
848 | if (strcmp(mi->name, m->name) < 0) | |
849 | p = &(*p)->rb_left; | |
850 | else | |
851 | p = &(*p)->rb_right; | |
852 | } | |
853 | rb_link_node(&mi->rb_node, parent, p); | |
854 | rb_insert_color(&mi->rb_node, modules); | |
855 | } | |
856 | ||
857 | static void delete_modules(struct rb_root *modules) | |
858 | { | |
859 | struct module_info *mi; | |
860 | struct rb_node *next = rb_first(modules); | |
861 | ||
862 | while (next) { | |
863 | mi = rb_entry(next, struct module_info, rb_node); | |
864 | next = rb_next(&mi->rb_node); | |
865 | rb_erase(&mi->rb_node, modules); | |
866 | free(mi->name); | |
867 | free(mi); | |
868 | } | |
869 | } | |
870 | ||
871 | static struct module_info *find_module(const char *name, | |
872 | struct rb_root *modules) | |
873 | { | |
874 | struct rb_node *n = modules->rb_node; | |
875 | ||
876 | while (n) { | |
877 | struct module_info *m; | |
878 | int cmp; | |
879 | ||
880 | m = rb_entry(n, struct module_info, rb_node); | |
881 | cmp = strcmp(name, m->name); | |
882 | if (cmp < 0) | |
883 | n = n->rb_left; | |
884 | else if (cmp > 0) | |
885 | n = n->rb_right; | |
886 | else | |
887 | return m; | |
888 | } | |
889 | ||
890 | return NULL; | |
891 | } | |
892 | ||
893 | static int __read_proc_modules(void *arg, const char *name, u64 start) | |
894 | { | |
895 | struct rb_root *modules = arg; | |
896 | struct module_info *mi; | |
897 | ||
898 | mi = zalloc(sizeof(struct module_info)); | |
899 | if (!mi) | |
8e0cf965 AH |
900 | return -ENOMEM; |
901 | ||
52afdaf9 AH |
902 | mi->name = strdup(name); |
903 | mi->start = start; | |
8e0cf965 | 904 | |
52afdaf9 AH |
905 | if (!mi->name) { |
906 | free(mi); | |
907 | return -ENOMEM; | |
908 | } | |
909 | ||
910 | add_module(mi, modules); | |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
915 | static int read_proc_modules(const char *filename, struct rb_root *modules) | |
916 | { | |
917 | if (symbol__restricted_filename(filename, "/proc/modules")) | |
918 | return -1; | |
919 | ||
920 | if (modules__parse(filename, modules, __read_proc_modules)) { | |
921 | delete_modules(modules); | |
922 | return -1; | |
923 | } | |
8e0cf965 AH |
924 | |
925 | return 0; | |
926 | } | |
927 | ||
fc1b691d AH |
928 | int compare_proc_modules(const char *from, const char *to) |
929 | { | |
930 | struct rb_root from_modules = RB_ROOT; | |
931 | struct rb_root to_modules = RB_ROOT; | |
932 | struct rb_node *from_node, *to_node; | |
933 | struct module_info *from_m, *to_m; | |
934 | int ret = -1; | |
935 | ||
936 | if (read_proc_modules(from, &from_modules)) | |
937 | return -1; | |
938 | ||
939 | if (read_proc_modules(to, &to_modules)) | |
940 | goto out_delete_from; | |
941 | ||
942 | from_node = rb_first(&from_modules); | |
943 | to_node = rb_first(&to_modules); | |
944 | while (from_node) { | |
945 | if (!to_node) | |
946 | break; | |
947 | ||
948 | from_m = rb_entry(from_node, struct module_info, rb_node); | |
949 | to_m = rb_entry(to_node, struct module_info, rb_node); | |
950 | ||
951 | if (from_m->start != to_m->start || | |
952 | strcmp(from_m->name, to_m->name)) | |
953 | break; | |
954 | ||
955 | from_node = rb_next(from_node); | |
956 | to_node = rb_next(to_node); | |
957 | } | |
958 | ||
959 | if (!from_node && !to_node) | |
960 | ret = 0; | |
961 | ||
962 | delete_modules(&to_modules); | |
963 | out_delete_from: | |
964 | delete_modules(&from_modules); | |
965 | ||
966 | return ret; | |
967 | } | |
968 | ||
52afdaf9 AH |
969 | static int do_validate_kcore_modules(const char *filename, struct map *map, |
970 | struct map_groups *kmaps) | |
971 | { | |
972 | struct rb_root modules = RB_ROOT; | |
973 | struct map *old_map; | |
974 | int err; | |
975 | ||
976 | err = read_proc_modules(filename, &modules); | |
977 | if (err) | |
978 | return err; | |
979 | ||
980 | old_map = map_groups__first(kmaps, map->type); | |
981 | while (old_map) { | |
982 | struct map *next = map_groups__next(old_map); | |
983 | struct module_info *mi; | |
984 | ||
985 | if (old_map == map || old_map->start == map->start) { | |
986 | /* The kernel map */ | |
987 | old_map = next; | |
988 | continue; | |
989 | } | |
990 | ||
991 | /* Module must be in memory at the same address */ | |
992 | mi = find_module(old_map->dso->short_name, &modules); | |
993 | if (!mi || mi->start != old_map->start) { | |
994 | err = -EINVAL; | |
995 | goto out; | |
996 | } | |
997 | ||
998 | old_map = next; | |
999 | } | |
1000 | out: | |
1001 | delete_modules(&modules); | |
1002 | return err; | |
1003 | } | |
1004 | ||
8e0cf965 | 1005 | /* |
52afdaf9 | 1006 | * If kallsyms is referenced by name then we look for filename in the same |
8e0cf965 AH |
1007 | * directory. |
1008 | */ | |
52afdaf9 AH |
1009 | static bool filename_from_kallsyms_filename(char *filename, |
1010 | const char *base_name, | |
1011 | const char *kallsyms_filename) | |
8e0cf965 AH |
1012 | { |
1013 | char *name; | |
1014 | ||
52afdaf9 AH |
1015 | strcpy(filename, kallsyms_filename); |
1016 | name = strrchr(filename, '/'); | |
8e0cf965 AH |
1017 | if (!name) |
1018 | return false; | |
1019 | ||
52afdaf9 AH |
1020 | name += 1; |
1021 | ||
1022 | if (!strcmp(name, "kallsyms")) { | |
1023 | strcpy(name, base_name); | |
8e0cf965 AH |
1024 | return true; |
1025 | } | |
1026 | ||
1027 | return false; | |
1028 | } | |
1029 | ||
52afdaf9 AH |
1030 | static int validate_kcore_modules(const char *kallsyms_filename, |
1031 | struct map *map) | |
1032 | { | |
1033 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1034 | char modules_filename[PATH_MAX]; | |
1035 | ||
1036 | if (!filename_from_kallsyms_filename(modules_filename, "modules", | |
1037 | kallsyms_filename)) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | if (do_validate_kcore_modules(modules_filename, map, kmaps)) | |
1041 | return -EINVAL; | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | struct kcore_mapfn_data { | |
1047 | struct dso *dso; | |
1048 | enum map_type type; | |
1049 | struct list_head maps; | |
1050 | }; | |
1051 | ||
1052 | static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data) | |
1053 | { | |
1054 | struct kcore_mapfn_data *md = data; | |
1055 | struct map *map; | |
1056 | ||
1057 | map = map__new2(start, md->dso, md->type); | |
1058 | if (map == NULL) | |
1059 | return -ENOMEM; | |
1060 | ||
1061 | map->end = map->start + len; | |
1062 | map->pgoff = pgoff; | |
1063 | ||
1064 | list_add(&map->node, &md->maps); | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
8e0cf965 AH |
1069 | static int dso__load_kcore(struct dso *dso, struct map *map, |
1070 | const char *kallsyms_filename) | |
1071 | { | |
1072 | struct map_groups *kmaps = map__kmap(map)->kmaps; | |
1073 | struct machine *machine = kmaps->machine; | |
1074 | struct kcore_mapfn_data md; | |
1075 | struct map *old_map, *new_map, *replacement_map = NULL; | |
1076 | bool is_64_bit; | |
1077 | int err, fd; | |
1078 | char kcore_filename[PATH_MAX]; | |
1079 | struct symbol *sym; | |
1080 | ||
1081 | /* This function requires that the map is the kernel map */ | |
1082 | if (map != machine->vmlinux_maps[map->type]) | |
1083 | return -EINVAL; | |
1084 | ||
52afdaf9 AH |
1085 | if (!filename_from_kallsyms_filename(kcore_filename, "kcore", |
1086 | kallsyms_filename)) | |
1087 | return -EINVAL; | |
1088 | ||
1089 | /* All modules must be present at their original addresses */ | |
1090 | if (validate_kcore_modules(kallsyms_filename, map)) | |
8e0cf965 AH |
1091 | return -EINVAL; |
1092 | ||
1093 | md.dso = dso; | |
1094 | md.type = map->type; | |
1095 | INIT_LIST_HEAD(&md.maps); | |
1096 | ||
1097 | fd = open(kcore_filename, O_RDONLY); | |
1098 | if (fd < 0) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | /* Read new maps into temporary lists */ | |
1102 | err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md, | |
1103 | &is_64_bit); | |
1104 | if (err) | |
1105 | goto out_err; | |
1106 | ||
1107 | if (list_empty(&md.maps)) { | |
1108 | err = -EINVAL; | |
1109 | goto out_err; | |
1110 | } | |
1111 | ||
1112 | /* Remove old maps */ | |
1113 | old_map = map_groups__first(kmaps, map->type); | |
1114 | while (old_map) { | |
1115 | struct map *next = map_groups__next(old_map); | |
1116 | ||
1117 | if (old_map != map) | |
1118 | map_groups__remove(kmaps, old_map); | |
1119 | old_map = next; | |
1120 | } | |
1121 | ||
1122 | /* Find the kernel map using the first symbol */ | |
1123 | sym = dso__first_symbol(dso, map->type); | |
1124 | list_for_each_entry(new_map, &md.maps, node) { | |
1125 | if (sym && sym->start >= new_map->start && | |
1126 | sym->start < new_map->end) { | |
1127 | replacement_map = new_map; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | if (!replacement_map) | |
1133 | replacement_map = list_entry(md.maps.next, struct map, node); | |
1134 | ||
1135 | /* Add new maps */ | |
1136 | while (!list_empty(&md.maps)) { | |
1137 | new_map = list_entry(md.maps.next, struct map, node); | |
1138 | list_del(&new_map->node); | |
1139 | if (new_map == replacement_map) { | |
1140 | map->start = new_map->start; | |
1141 | map->end = new_map->end; | |
1142 | map->pgoff = new_map->pgoff; | |
1143 | map->map_ip = new_map->map_ip; | |
1144 | map->unmap_ip = new_map->unmap_ip; | |
1145 | map__delete(new_map); | |
1146 | /* Ensure maps are correctly ordered */ | |
1147 | map_groups__remove(kmaps, map); | |
1148 | map_groups__insert(kmaps, map); | |
1149 | } else { | |
1150 | map_groups__insert(kmaps, new_map); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * Set the data type and long name so that kcore can be read via | |
1156 | * dso__data_read_addr(). | |
1157 | */ | |
1158 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1159 | dso->data_type = DSO_BINARY_TYPE__GUEST_KCORE; | |
1160 | else | |
1161 | dso->data_type = DSO_BINARY_TYPE__KCORE; | |
1162 | dso__set_long_name(dso, strdup(kcore_filename)); | |
1163 | ||
1164 | close(fd); | |
1165 | ||
1166 | if (map->type == MAP__FUNCTION) | |
1167 | pr_debug("Using %s for kernel object code\n", kcore_filename); | |
1168 | else | |
1169 | pr_debug("Using %s for kernel data\n", kcore_filename); | |
1170 | ||
1171 | return 0; | |
1172 | ||
1173 | out_err: | |
1174 | while (!list_empty(&md.maps)) { | |
1175 | map = list_entry(md.maps.next, struct map, node); | |
1176 | list_del(&map->node); | |
1177 | map__delete(map); | |
1178 | } | |
1179 | close(fd); | |
1180 | return -EINVAL; | |
1181 | } | |
1182 | ||
aeafcbaf | 1183 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 1184 | struct map *map, symbol_filter_t filter) |
2e538c4a | 1185 | { |
ec80fde7 ACM |
1186 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1187 | return -1; | |
1188 | ||
aeafcbaf | 1189 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
1190 | return -1; |
1191 | ||
694bf407 | 1192 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
1193 | symbols__fixup_end(&dso->symbols[map->type]); |
1194 | ||
aeafcbaf | 1195 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 1196 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 1197 | else |
44f24cb3 | 1198 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 1199 | |
8e0cf965 AH |
1200 | if (!dso__load_kcore(dso, map, filename)) |
1201 | return dso__split_kallsyms_for_kcore(dso, map, filter); | |
1202 | else | |
1203 | return dso__split_kallsyms(dso, map, filter); | |
af427bf5 ACM |
1204 | } |
1205 | ||
aeafcbaf | 1206 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 1207 | symbol_filter_t filter) |
80d496be PE |
1208 | { |
1209 | char *line = NULL; | |
1210 | size_t n; | |
1211 | FILE *file; | |
1212 | int nr_syms = 0; | |
1213 | ||
aeafcbaf | 1214 | file = fopen(dso->long_name, "r"); |
80d496be PE |
1215 | if (file == NULL) |
1216 | goto out_failure; | |
1217 | ||
1218 | while (!feof(file)) { | |
9cffa8d5 | 1219 | u64 start, size; |
80d496be PE |
1220 | struct symbol *sym; |
1221 | int line_len, len; | |
1222 | ||
1223 | line_len = getline(&line, &n, file); | |
1224 | if (line_len < 0) | |
1225 | break; | |
1226 | ||
1227 | if (!line) | |
1228 | goto out_failure; | |
1229 | ||
1230 | line[--line_len] = '\0'; /* \n */ | |
1231 | ||
1232 | len = hex2u64(line, &start); | |
1233 | ||
1234 | len++; | |
1235 | if (len + 2 >= line_len) | |
1236 | continue; | |
1237 | ||
1238 | len += hex2u64(line + len, &size); | |
1239 | ||
1240 | len++; | |
1241 | if (len + 2 >= line_len) | |
1242 | continue; | |
1243 | ||
c408fedf | 1244 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
1245 | |
1246 | if (sym == NULL) | |
1247 | goto out_delete_line; | |
1248 | ||
439d473b | 1249 | if (filter && filter(map, sym)) |
00a192b3 | 1250 | symbol__delete(sym); |
80d496be | 1251 | else { |
aeafcbaf | 1252 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
1253 | nr_syms++; |
1254 | } | |
1255 | } | |
1256 | ||
1257 | free(line); | |
1258 | fclose(file); | |
1259 | ||
1260 | return nr_syms; | |
1261 | ||
1262 | out_delete_line: | |
1263 | free(line); | |
1264 | out_failure: | |
1265 | return -1; | |
1266 | } | |
1267 | ||
aeafcbaf | 1268 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1269 | { |
c338aee8 | 1270 | char *name; |
a2928c42 | 1271 | int ret = -1; |
44f24cb3 | 1272 | u_int i; |
23346f21 | 1273 | struct machine *machine; |
44f24cb3 | 1274 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1275 | int ss_pos = 0; |
1276 | struct symsrc ss_[2]; | |
1277 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
a2928c42 | 1278 | |
aeafcbaf | 1279 | dso__set_loaded(dso, map->type); |
66bd8424 | 1280 | |
aeafcbaf ACM |
1281 | if (dso->kernel == DSO_TYPE_KERNEL) |
1282 | return dso__load_kernel_sym(dso, map, filter); | |
1283 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1284 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1285 | |
23346f21 ACM |
1286 | if (map->groups && map->groups->machine) |
1287 | machine = map->groups->machine; | |
a1645ce1 | 1288 | else |
23346f21 | 1289 | machine = NULL; |
c338aee8 | 1290 | |
aeafcbaf | 1291 | dso->adjust_symbols = 0; |
f5812a7a | 1292 | |
aeafcbaf | 1293 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1294 | struct stat st; |
1295 | ||
e9b52ef2 | 1296 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1297 | return -1; |
1298 | ||
1299 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1300 | pr_warning("File %s not owned by current user or root, " | |
1301 | "ignoring it.\n", dso->name); | |
1302 | return -1; | |
1303 | } | |
1304 | ||
aeafcbaf | 1305 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1306 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1307 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1308 | return ret; |
1309 | } | |
1310 | ||
44f24cb3 JO |
1311 | if (machine) |
1312 | root_dir = machine->root_dir; | |
1313 | ||
164c800e DA |
1314 | name = malloc(PATH_MAX); |
1315 | if (!name) | |
1316 | return -1; | |
1317 | ||
6da80ce8 | 1318 | /* Iterate over candidate debug images. |
3aafe5ae CS |
1319 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1320 | * and/or opd section) for processing. | |
6da80ce8 | 1321 | */ |
44f24cb3 | 1322 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1323 | struct symsrc *ss = &ss_[ss_pos]; |
1324 | bool next_slot = false; | |
6da80ce8 | 1325 | |
005f9294 | 1326 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1327 | |
005f9294 | 1328 | if (dso__binary_type_file(dso, symtab_type, |
44f24cb3 JO |
1329 | root_dir, name, PATH_MAX)) |
1330 | continue; | |
6da80ce8 DM |
1331 | |
1332 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1333 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1334 | continue; |
a2928c42 | 1335 | |
3aafe5ae CS |
1336 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1337 | syms_ss = ss; | |
1338 | next_slot = true; | |
0058aef6 AH |
1339 | if (!dso->symsrc_filename) |
1340 | dso->symsrc_filename = strdup(name); | |
d26cd12b CS |
1341 | } |
1342 | ||
3aafe5ae CS |
1343 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1344 | runtime_ss = ss; | |
1345 | next_slot = true; | |
a44f605b | 1346 | } |
a2928c42 | 1347 | |
3aafe5ae CS |
1348 | if (next_slot) { |
1349 | ss_pos++; | |
33ff581e | 1350 | |
3aafe5ae CS |
1351 | if (syms_ss && runtime_ss) |
1352 | break; | |
6da80ce8 | 1353 | } |
3aafe5ae | 1354 | |
a25e46c4 | 1355 | } |
6da80ce8 | 1356 | |
3aafe5ae CS |
1357 | if (!runtime_ss && !syms_ss) |
1358 | goto out_free; | |
1359 | ||
1360 | if (runtime_ss && !syms_ss) { | |
1361 | syms_ss = runtime_ss; | |
1362 | } | |
1363 | ||
1364 | /* We'll have to hope for the best */ | |
1365 | if (!runtime_ss && syms_ss) | |
1366 | runtime_ss = syms_ss; | |
1367 | ||
0131c4ec AH |
1368 | if (syms_ss) { |
1369 | int km; | |
1370 | ||
1371 | km = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1372 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1373 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, km); | |
1374 | } else { | |
3aafe5ae | 1375 | ret = -1; |
0131c4ec | 1376 | } |
3aafe5ae | 1377 | |
f47b58b7 | 1378 | if (ret > 0) { |
3aafe5ae CS |
1379 | int nr_plt; |
1380 | ||
1381 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1382 | if (nr_plt > 0) | |
1383 | ret += nr_plt; | |
60e4b10c ACM |
1384 | } |
1385 | ||
3aafe5ae CS |
1386 | for (; ss_pos > 0; ss_pos--) |
1387 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1388 | out_free: | |
a2928c42 | 1389 | free(name); |
aeafcbaf | 1390 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1391 | return 0; |
a2928c42 ACM |
1392 | return ret; |
1393 | } | |
1394 | ||
aeafcbaf | 1395 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1396 | enum map_type type, const char *name) |
439d473b ACM |
1397 | { |
1398 | struct rb_node *nd; | |
1399 | ||
aeafcbaf | 1400 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1401 | struct map *map = rb_entry(nd, struct map, rb_node); |
1402 | ||
b7cece76 | 1403 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1404 | return map; |
1405 | } | |
1406 | ||
1407 | return NULL; | |
1408 | } | |
1409 | ||
aeafcbaf | 1410 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
5230fb7d ACM |
1411 | const char *vmlinux, bool vmlinux_allocated, |
1412 | symbol_filter_t filter) | |
a2928c42 | 1413 | { |
b68e2f91 CS |
1414 | int err = -1; |
1415 | struct symsrc ss; | |
ec5761ea | 1416 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1417 | enum dso_binary_type symtab_type; |
a2928c42 | 1418 | |
5698d2c9 NK |
1419 | if (vmlinux[0] == '/') |
1420 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); | |
1421 | else | |
1422 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", | |
1423 | symbol_conf.symfs, vmlinux); | |
a2928c42 | 1424 | |
21ea4539 | 1425 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1426 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1427 | else |
005f9294 | 1428 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1429 | |
005f9294 | 1430 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1431 | return -1; |
1432 | ||
261360b6 | 1433 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1434 | symsrc__destroy(&ss); |
a2928c42 | 1435 | |
515850e4 | 1436 | if (err > 0) { |
39b12f78 AH |
1437 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
1438 | dso->data_type = DSO_BINARY_TYPE__GUEST_VMLINUX; | |
1439 | else | |
1440 | dso->data_type = DSO_BINARY_TYPE__VMLINUX; | |
515850e4 | 1441 | dso__set_long_name(dso, (char *)vmlinux); |
5230fb7d | 1442 | dso->long_name_allocated = vmlinux_allocated; |
515850e4 | 1443 | dso__set_loaded(dso, map->type); |
ec5761ea | 1444 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1445 | } |
3846df2e | 1446 | |
a2928c42 ACM |
1447 | return err; |
1448 | } | |
1449 | ||
aeafcbaf | 1450 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1451 | symbol_filter_t filter) |
a19afe46 ACM |
1452 | { |
1453 | int i, err = 0; | |
5ad90e4e | 1454 | char *filename; |
a19afe46 ACM |
1455 | |
1456 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1457 | vmlinux_path__nr_entries + 1); |
1458 | ||
aeafcbaf | 1459 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1460 | if (filename != NULL) { |
5230fb7d ACM |
1461 | err = dso__load_vmlinux(dso, map, filename, true, filter); |
1462 | if (err > 0) | |
5ad90e4e | 1463 | goto out; |
5ad90e4e ACM |
1464 | free(filename); |
1465 | } | |
a19afe46 ACM |
1466 | |
1467 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
5230fb7d ACM |
1468 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], false, filter); |
1469 | if (err > 0) | |
a19afe46 | 1470 | break; |
a19afe46 | 1471 | } |
5ad90e4e | 1472 | out: |
a19afe46 ACM |
1473 | return err; |
1474 | } | |
1475 | ||
0544d422 AH |
1476 | static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz) |
1477 | { | |
1478 | char kallsyms_filename[PATH_MAX]; | |
1479 | struct dirent *dent; | |
1480 | int ret = -1; | |
1481 | DIR *d; | |
1482 | ||
1483 | d = opendir(dir); | |
1484 | if (!d) | |
1485 | return -1; | |
1486 | ||
1487 | while (1) { | |
1488 | dent = readdir(d); | |
1489 | if (!dent) | |
1490 | break; | |
1491 | if (dent->d_type != DT_DIR) | |
1492 | continue; | |
1493 | scnprintf(kallsyms_filename, sizeof(kallsyms_filename), | |
1494 | "%s/%s/kallsyms", dir, dent->d_name); | |
1495 | if (!validate_kcore_modules(kallsyms_filename, map)) { | |
1496 | strlcpy(dir, kallsyms_filename, dir_sz); | |
1497 | ret = 0; | |
1498 | break; | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | closedir(d); | |
1503 | ||
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | static char *dso__find_kallsyms(struct dso *dso, struct map *map) | |
1508 | { | |
1509 | u8 host_build_id[BUILD_ID_SIZE]; | |
1510 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1511 | bool is_host = false; | |
1512 | char path[PATH_MAX]; | |
1513 | ||
1514 | if (!dso->has_build_id) { | |
1515 | /* | |
1516 | * Last resort, if we don't have a build-id and couldn't find | |
1517 | * any vmlinux file, try the running kernel kallsyms table. | |
1518 | */ | |
1519 | goto proc_kallsyms; | |
1520 | } | |
1521 | ||
1522 | if (sysfs__read_build_id("/sys/kernel/notes", host_build_id, | |
1523 | sizeof(host_build_id)) == 0) | |
1524 | is_host = dso__build_id_equal(dso, host_build_id); | |
1525 | ||
1526 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1527 | ||
449867e3 AH |
1528 | scnprintf(path, sizeof(path), "%s/[kernel.kcore]/%s", buildid_dir, |
1529 | sbuild_id); | |
1530 | ||
0544d422 AH |
1531 | /* Use /proc/kallsyms if possible */ |
1532 | if (is_host) { | |
1533 | DIR *d; | |
1534 | int fd; | |
1535 | ||
1536 | /* If no cached kcore go with /proc/kallsyms */ | |
0544d422 AH |
1537 | d = opendir(path); |
1538 | if (!d) | |
1539 | goto proc_kallsyms; | |
1540 | closedir(d); | |
1541 | ||
1542 | /* | |
1543 | * Do not check the build-id cache, until we know we cannot use | |
1544 | * /proc/kcore. | |
1545 | */ | |
1546 | fd = open("/proc/kcore", O_RDONLY); | |
1547 | if (fd != -1) { | |
1548 | close(fd); | |
1549 | /* If module maps match go with /proc/kallsyms */ | |
1550 | if (!validate_kcore_modules("/proc/kallsyms", map)) | |
1551 | goto proc_kallsyms; | |
1552 | } | |
1553 | ||
1554 | /* Find kallsyms in build-id cache with kcore */ | |
1555 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1556 | return strdup(path); | |
1557 | ||
1558 | goto proc_kallsyms; | |
1559 | } | |
1560 | ||
449867e3 AH |
1561 | /* Find kallsyms in build-id cache with kcore */ |
1562 | if (!find_matching_kcore(map, path, sizeof(path))) | |
1563 | return strdup(path); | |
1564 | ||
0544d422 AH |
1565 | scnprintf(path, sizeof(path), "%s/[kernel.kallsyms]/%s", |
1566 | buildid_dir, sbuild_id); | |
1567 | ||
1568 | if (access(path, F_OK)) { | |
1569 | pr_err("No kallsyms or vmlinux with build-id %s was found\n", | |
1570 | sbuild_id); | |
1571 | return NULL; | |
1572 | } | |
1573 | ||
1574 | return strdup(path); | |
1575 | ||
1576 | proc_kallsyms: | |
1577 | return strdup("/proc/kallsyms"); | |
1578 | } | |
1579 | ||
aeafcbaf | 1580 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1581 | symbol_filter_t filter) |
a827c875 | 1582 | { |
cc612d81 | 1583 | int err; |
9e201442 ACM |
1584 | const char *kallsyms_filename = NULL; |
1585 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1586 | /* |
b226a5a7 DA |
1587 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1588 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1589 | * |
1590 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1591 | * build-id, or if the user specifies the wrong path to the right | |
1592 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1593 | * x86_86 one, on the machine where analysis is being performed, say), | |
1594 | * or worse, /proc/kallsyms. | |
1595 | * | |
1596 | * If the specified file _has_ a build-id and there is a build-id | |
1597 | * section in the perf.data file, we will still do the expected | |
1598 | * validation in dso__load_vmlinux and will bail out if they don't | |
1599 | * match. | |
1600 | */ | |
b226a5a7 DA |
1601 | if (symbol_conf.kallsyms_name != NULL) { |
1602 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1603 | goto do_kallsyms; | |
1604 | } | |
1605 | ||
fc2be696 | 1606 | if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) { |
5230fb7d ACM |
1607 | return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, |
1608 | false, filter); | |
dc8d6ab2 | 1609 | } |
cc612d81 | 1610 | |
fc2be696 | 1611 | if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) { |
aeafcbaf | 1612 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 | 1613 | if (err > 0) |
39b12f78 | 1614 | return err; |
cc612d81 ACM |
1615 | } |
1616 | ||
ec5761ea DA |
1617 | /* do not try local files if a symfs was given */ |
1618 | if (symbol_conf.symfs[0] != 0) | |
1619 | return -1; | |
1620 | ||
0544d422 AH |
1621 | kallsyms_allocated_filename = dso__find_kallsyms(dso, map); |
1622 | if (!kallsyms_allocated_filename) | |
1623 | return -1; | |
19fc2ded | 1624 | |
0544d422 | 1625 | kallsyms_filename = kallsyms_allocated_filename; |
439d473b | 1626 | |
cc612d81 | 1627 | do_kallsyms: |
aeafcbaf | 1628 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1629 | if (err > 0) |
1630 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1631 | free(kallsyms_allocated_filename); |
439d473b | 1632 | |
8e0cf965 | 1633 | if (err > 0 && !dso__is_kcore(dso)) { |
0a0317b4 | 1634 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1635 | map__fixup_start(map); |
1636 | map__fixup_end(map); | |
439d473b | 1637 | } |
94cb9e38 | 1638 | |
a827c875 ACM |
1639 | return err; |
1640 | } | |
1641 | ||
aeafcbaf ACM |
1642 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1643 | symbol_filter_t filter) | |
a1645ce1 ZY |
1644 | { |
1645 | int err; | |
1646 | const char *kallsyms_filename = NULL; | |
23346f21 | 1647 | struct machine *machine; |
a1645ce1 ZY |
1648 | char path[PATH_MAX]; |
1649 | ||
1650 | if (!map->groups) { | |
1651 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1652 | return -1; | |
1653 | } | |
23346f21 | 1654 | machine = map->groups->machine; |
a1645ce1 | 1655 | |
23346f21 | 1656 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1657 | /* |
1658 | * if the user specified a vmlinux filename, use it and only | |
1659 | * it, reporting errors to the user if it cannot be used. | |
1660 | * Or use file guest_kallsyms inputted by user on commandline | |
1661 | */ | |
1662 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1663 | err = dso__load_vmlinux(dso, map, |
5230fb7d ACM |
1664 | symbol_conf.default_guest_vmlinux_name, |
1665 | false, filter); | |
39b12f78 | 1666 | return err; |
a1645ce1 ZY |
1667 | } |
1668 | ||
1669 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1670 | if (!kallsyms_filename) | |
1671 | return -1; | |
1672 | } else { | |
23346f21 | 1673 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1674 | kallsyms_filename = path; |
1675 | } | |
1676 | ||
aeafcbaf | 1677 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
8e0cf965 | 1678 | if (err > 0) |
39b12f78 | 1679 | pr_debug("Using %s for symbols\n", kallsyms_filename); |
8e0cf965 | 1680 | if (err > 0 && !dso__is_kcore(dso)) { |
39b12f78 AH |
1681 | machine__mmap_name(machine, path, sizeof(path)); |
1682 | dso__set_long_name(dso, strdup(path)); | |
a1645ce1 ZY |
1683 | map__fixup_start(map); |
1684 | map__fixup_end(map); | |
1685 | } | |
1686 | ||
1687 | return err; | |
1688 | } | |
cd84c2ac | 1689 | |
cc612d81 ACM |
1690 | static void vmlinux_path__exit(void) |
1691 | { | |
1692 | while (--vmlinux_path__nr_entries >= 0) { | |
1693 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1694 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1695 | } | |
1696 | ||
1697 | free(vmlinux_path); | |
1698 | vmlinux_path = NULL; | |
1699 | } | |
1700 | ||
1701 | static int vmlinux_path__init(void) | |
1702 | { | |
1703 | struct utsname uts; | |
1704 | char bf[PATH_MAX]; | |
1705 | ||
cc612d81 ACM |
1706 | vmlinux_path = malloc(sizeof(char *) * 5); |
1707 | if (vmlinux_path == NULL) | |
1708 | return -1; | |
1709 | ||
1710 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1711 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1712 | goto out_fail; | |
1713 | ++vmlinux_path__nr_entries; | |
1714 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1715 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1716 | goto out_fail; | |
1717 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
1718 | |
1719 | /* only try running kernel version if no symfs was given */ | |
1720 | if (symbol_conf.symfs[0] != 0) | |
1721 | return 0; | |
1722 | ||
1723 | if (uname(&uts) < 0) | |
1724 | return -1; | |
1725 | ||
cc612d81 ACM |
1726 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
1727 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1728 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1729 | goto out_fail; | |
1730 | ++vmlinux_path__nr_entries; | |
1731 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1732 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1733 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1734 | goto out_fail; | |
1735 | ++vmlinux_path__nr_entries; | |
1736 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1737 | uts.release); | |
1738 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1739 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1740 | goto out_fail; | |
1741 | ++vmlinux_path__nr_entries; | |
1742 | ||
1743 | return 0; | |
1744 | ||
1745 | out_fail: | |
1746 | vmlinux_path__exit(); | |
1747 | return -1; | |
1748 | } | |
1749 | ||
3bfe5f81 | 1750 | int setup_list(struct strlist **list, const char *list_str, |
655000e7 ACM |
1751 | const char *list_name) |
1752 | { | |
1753 | if (list_str == NULL) | |
1754 | return 0; | |
1755 | ||
1756 | *list = strlist__new(true, list_str); | |
1757 | if (!*list) { | |
1758 | pr_err("problems parsing %s list\n", list_name); | |
1759 | return -1; | |
1760 | } | |
1761 | return 0; | |
1762 | } | |
1763 | ||
ec80fde7 ACM |
1764 | static bool symbol__read_kptr_restrict(void) |
1765 | { | |
1766 | bool value = false; | |
1767 | ||
1768 | if (geteuid() != 0) { | |
1769 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1770 | if (fp != NULL) { | |
1771 | char line[8]; | |
1772 | ||
1773 | if (fgets(line, sizeof(line), fp) != NULL) | |
1774 | value = atoi(line) != 0; | |
1775 | ||
1776 | fclose(fp); | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | return value; | |
1781 | } | |
1782 | ||
75be6cf4 | 1783 | int symbol__init(void) |
2446042c | 1784 | { |
ec5761ea DA |
1785 | const char *symfs; |
1786 | ||
85e00b55 JZ |
1787 | if (symbol_conf.initialized) |
1788 | return 0; | |
1789 | ||
9ac3e487 | 1790 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1791 | |
166ccc9c NK |
1792 | symbol__elf_init(); |
1793 | ||
75be6cf4 ACM |
1794 | if (symbol_conf.sort_by_name) |
1795 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1796 | sizeof(struct symbol)); | |
b32d133a | 1797 | |
75be6cf4 | 1798 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1799 | return -1; |
1800 | ||
c410a338 ACM |
1801 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1802 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1803 | return -1; | |
1804 | } | |
1805 | ||
655000e7 ACM |
1806 | if (setup_list(&symbol_conf.dso_list, |
1807 | symbol_conf.dso_list_str, "dso") < 0) | |
1808 | return -1; | |
1809 | ||
1810 | if (setup_list(&symbol_conf.comm_list, | |
1811 | symbol_conf.comm_list_str, "comm") < 0) | |
1812 | goto out_free_dso_list; | |
1813 | ||
1814 | if (setup_list(&symbol_conf.sym_list, | |
1815 | symbol_conf.sym_list_str, "symbol") < 0) | |
1816 | goto out_free_comm_list; | |
1817 | ||
ec5761ea DA |
1818 | /* |
1819 | * A path to symbols of "/" is identical to "" | |
1820 | * reset here for simplicity. | |
1821 | */ | |
1822 | symfs = realpath(symbol_conf.symfs, NULL); | |
1823 | if (symfs == NULL) | |
1824 | symfs = symbol_conf.symfs; | |
1825 | if (strcmp(symfs, "/") == 0) | |
1826 | symbol_conf.symfs = ""; | |
1827 | if (symfs != symbol_conf.symfs) | |
1828 | free((void *)symfs); | |
1829 | ||
ec80fde7 ACM |
1830 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
1831 | ||
85e00b55 | 1832 | symbol_conf.initialized = true; |
4aa65636 | 1833 | return 0; |
655000e7 | 1834 | |
655000e7 ACM |
1835 | out_free_comm_list: |
1836 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
1837 | out_free_dso_list: |
1838 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 1839 | return -1; |
4aa65636 ACM |
1840 | } |
1841 | ||
d65a458b ACM |
1842 | void symbol__exit(void) |
1843 | { | |
85e00b55 JZ |
1844 | if (!symbol_conf.initialized) |
1845 | return; | |
d65a458b ACM |
1846 | strlist__delete(symbol_conf.sym_list); |
1847 | strlist__delete(symbol_conf.dso_list); | |
1848 | strlist__delete(symbol_conf.comm_list); | |
1849 | vmlinux_path__exit(); | |
1850 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 1851 | symbol_conf.initialized = false; |
d65a458b | 1852 | } |