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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" |
a2928c42 | 15 | #include "symbol.h" |
5aab621b | 16 | #include "strlist.h" |
a2928c42 | 17 | |
a2928c42 | 18 | #include <elf.h> |
f1617b40 | 19 | #include <limits.h> |
439d473b | 20 | #include <sys/utsname.h> |
2cdbc46d | 21 | |
3b01a413 | 22 | #ifndef KSYM_NAME_LEN |
c752d040 | 23 | #define KSYM_NAME_LEN 256 |
3b01a413 ACM |
24 | #endif |
25 | ||
4dff624a | 26 | static void dso_cache__free(struct rb_root *root); |
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); |
cc612d81 ACM |
31 | static int vmlinux_path__nr_entries; |
32 | static char **vmlinux_path; | |
439d473b | 33 | |
75be6cf4 | 34 | struct symbol_conf symbol_conf = { |
d599db3f | 35 | .exclude_other = true, |
b32d133a ACM |
36 | .use_modules = true, |
37 | .try_vmlinux_path = true, | |
3e6a2a7f | 38 | .annotate_src = 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, | |
54 | DSO_BINARY_TYPE__NOT_FOUND, | |
55 | }; | |
56 | ||
028df767 | 57 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 58 | |
949d160b JO |
59 | static enum dso_binary_type binary_type_data[] = { |
60 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
61 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
62 | DSO_BINARY_TYPE__NOT_FOUND, | |
63 | }; | |
64 | ||
028df767 | 65 | #define DSO_BINARY_TYPE__DATA_CNT ARRAY_SIZE(binary_type_data) |
949d160b | 66 | |
aeafcbaf | 67 | int dso__name_len(const struct dso *dso) |
8a6c5b26 | 68 | { |
1e2dd2f7 DM |
69 | if (!dso) |
70 | return strlen("[unknown]"); | |
8a6c5b26 | 71 | if (verbose) |
aeafcbaf | 72 | return dso->long_name_len; |
8a6c5b26 | 73 | |
aeafcbaf | 74 | return dso->short_name_len; |
8a6c5b26 ACM |
75 | } |
76 | ||
aeafcbaf | 77 | bool dso__loaded(const struct dso *dso, enum map_type type) |
3610583c | 78 | { |
aeafcbaf | 79 | return dso->loaded & (1 << type); |
3610583c ACM |
80 | } |
81 | ||
aeafcbaf | 82 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) |
79406cd7 | 83 | { |
aeafcbaf | 84 | return dso->sorted_by_name & (1 << type); |
79406cd7 ACM |
85 | } |
86 | ||
aeafcbaf | 87 | static void dso__set_sorted_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 88 | { |
aeafcbaf | 89 | dso->sorted_by_name |= (1 << type); |
79406cd7 ACM |
90 | } |
91 | ||
36a3e646 | 92 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 93 | { |
31877908 AB |
94 | symbol_type = toupper(symbol_type); |
95 | ||
6893d4ee ACM |
96 | switch (map_type) { |
97 | case MAP__FUNCTION: | |
98 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 99 | case MAP__VARIABLE: |
31877908 | 100 | return symbol_type == 'D'; |
6893d4ee ACM |
101 | default: |
102 | return false; | |
103 | } | |
104 | } | |
105 | ||
694bf407 AB |
106 | static int prefix_underscores_count(const char *str) |
107 | { | |
108 | const char *tail = str; | |
109 | ||
110 | while (*tail == '_') | |
111 | tail++; | |
112 | ||
113 | return tail - str; | |
114 | } | |
115 | ||
116 | #define SYMBOL_A 0 | |
117 | #define SYMBOL_B 1 | |
118 | ||
119 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
120 | { | |
121 | s64 a; | |
122 | s64 b; | |
123 | ||
124 | /* Prefer a symbol with non zero length */ | |
125 | a = syma->end - syma->start; | |
126 | b = symb->end - symb->start; | |
127 | if ((b == 0) && (a > 0)) | |
128 | return SYMBOL_A; | |
129 | else if ((a == 0) && (b > 0)) | |
130 | return SYMBOL_B; | |
131 | ||
132 | /* Prefer a non weak symbol over a weak one */ | |
133 | a = syma->binding == STB_WEAK; | |
134 | b = symb->binding == STB_WEAK; | |
135 | if (b && !a) | |
136 | return SYMBOL_A; | |
137 | if (a && !b) | |
138 | return SYMBOL_B; | |
139 | ||
140 | /* Prefer a global symbol over a non global one */ | |
141 | a = syma->binding == STB_GLOBAL; | |
142 | b = symb->binding == STB_GLOBAL; | |
143 | if (a && !b) | |
144 | return SYMBOL_A; | |
145 | if (b && !a) | |
146 | return SYMBOL_B; | |
147 | ||
148 | /* Prefer a symbol with less underscores */ | |
149 | a = prefix_underscores_count(syma->name); | |
150 | b = prefix_underscores_count(symb->name); | |
151 | if (b > a) | |
152 | return SYMBOL_A; | |
153 | else if (a > b) | |
154 | return SYMBOL_B; | |
155 | ||
156 | /* If all else fails, choose the symbol with the longest name */ | |
157 | if (strlen(syma->name) >= strlen(symb->name)) | |
158 | return SYMBOL_A; | |
159 | else | |
160 | return SYMBOL_B; | |
161 | } | |
162 | ||
e5a1845f | 163 | void symbols__fixup_duplicate(struct rb_root *symbols) |
694bf407 AB |
164 | { |
165 | struct rb_node *nd; | |
166 | struct symbol *curr, *next; | |
167 | ||
168 | nd = rb_first(symbols); | |
169 | ||
170 | while (nd) { | |
171 | curr = rb_entry(nd, struct symbol, rb_node); | |
172 | again: | |
173 | nd = rb_next(&curr->rb_node); | |
174 | next = rb_entry(nd, struct symbol, rb_node); | |
175 | ||
176 | if (!nd) | |
177 | break; | |
178 | ||
179 | if (curr->start != next->start) | |
180 | continue; | |
181 | ||
182 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
183 | rb_erase(&next->rb_node, symbols); | |
184 | goto again; | |
185 | } else { | |
186 | nd = rb_next(&curr->rb_node); | |
187 | rb_erase(&curr->rb_node, symbols); | |
188 | } | |
189 | } | |
190 | } | |
191 | ||
e5a1845f | 192 | void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 193 | { |
aeafcbaf | 194 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 195 | struct symbol *curr, *prev; |
af427bf5 ACM |
196 | |
197 | if (prevnd == NULL) | |
198 | return; | |
199 | ||
2e538c4a ACM |
200 | curr = rb_entry(prevnd, struct symbol, rb_node); |
201 | ||
af427bf5 | 202 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
203 | prev = curr; |
204 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 205 | |
3b01a413 | 206 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 207 | prev->end = curr->start - 1; |
af427bf5 | 208 | } |
2e538c4a ACM |
209 | |
210 | /* Last entry */ | |
211 | if (curr->end == curr->start) | |
212 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
213 | } |
214 | ||
e5a1845f | 215 | void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
216 | { |
217 | struct map *prev, *curr; | |
aeafcbaf | 218 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
219 | |
220 | if (prevnd == NULL) | |
221 | return; | |
222 | ||
223 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
224 | |
225 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
226 | prev = curr; | |
227 | curr = rb_entry(nd, struct map, rb_node); | |
228 | prev->end = curr->start - 1; | |
2e538c4a | 229 | } |
90c83218 ACM |
230 | |
231 | /* | |
232 | * We still haven't the actual symbols, so guess the | |
233 | * last map final address. | |
234 | */ | |
9d1faba5 | 235 | curr->end = ~0ULL; |
af427bf5 ACM |
236 | } |
237 | ||
aeafcbaf | 238 | static void map_groups__fixup_end(struct map_groups *mg) |
23ea4a3f ACM |
239 | { |
240 | int i; | |
241 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf | 242 | __map_groups__fixup_end(mg, i); |
23ea4a3f ACM |
243 | } |
244 | ||
e5a1845f | 245 | struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) |
a2928c42 | 246 | { |
0085c954 | 247 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
248 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
249 | sizeof(*sym) + namelen)); | |
250 | if (sym == NULL) | |
0b73da3f IM |
251 | return NULL; |
252 | ||
75be6cf4 | 253 | if (symbol_conf.priv_size) |
aeafcbaf | 254 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 255 | |
aeafcbaf ACM |
256 | sym->start = start; |
257 | sym->end = len ? start + len - 1 : start; | |
258 | sym->binding = binding; | |
259 | sym->namelen = namelen - 1; | |
e4204992 | 260 | |
aeafcbaf ACM |
261 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
262 | __func__, name, start, sym->end); | |
263 | memcpy(sym->name, name, namelen); | |
a2928c42 | 264 | |
aeafcbaf | 265 | return sym; |
a2928c42 ACM |
266 | } |
267 | ||
aeafcbaf | 268 | void symbol__delete(struct symbol *sym) |
a2928c42 | 269 | { |
aeafcbaf | 270 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
271 | } |
272 | ||
aeafcbaf | 273 | static size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 274 | { |
9486aa38 | 275 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
276 | sym->start, sym->end, |
277 | sym->binding == STB_GLOBAL ? 'g' : | |
278 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
279 | sym->name); | |
a2928c42 ACM |
280 | } |
281 | ||
a978f2ab AN |
282 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
283 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 284 | { |
a978f2ab AN |
285 | unsigned long offset; |
286 | size_t length; | |
287 | ||
288 | if (sym && sym->name) { | |
289 | length = fprintf(fp, "%s", sym->name); | |
290 | if (al) { | |
291 | offset = al->addr - sym->start; | |
292 | length += fprintf(fp, "+0x%lx", offset); | |
293 | } | |
294 | return length; | |
295 | } else | |
296 | return fprintf(fp, "[unknown]"); | |
297 | } | |
547a92e0 | 298 | |
a978f2ab AN |
299 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
300 | { | |
301 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
302 | } |
303 | ||
aeafcbaf | 304 | void dso__set_long_name(struct dso *dso, char *name) |
cfc10d3b | 305 | { |
ef6ae724 ACM |
306 | if (name == NULL) |
307 | return; | |
aeafcbaf ACM |
308 | dso->long_name = name; |
309 | dso->long_name_len = strlen(name); | |
cfc10d3b ACM |
310 | } |
311 | ||
aeafcbaf | 312 | static void dso__set_short_name(struct dso *dso, const char *name) |
b63be8d7 ACM |
313 | { |
314 | if (name == NULL) | |
315 | return; | |
aeafcbaf ACM |
316 | dso->short_name = name; |
317 | dso->short_name_len = strlen(name); | |
b63be8d7 ACM |
318 | } |
319 | ||
aeafcbaf | 320 | static void dso__set_basename(struct dso *dso) |
cfc10d3b | 321 | { |
aeafcbaf | 322 | dso__set_short_name(dso, basename(dso->long_name)); |
cfc10d3b ACM |
323 | } |
324 | ||
00a192b3 | 325 | struct dso *dso__new(const char *name) |
a2928c42 | 326 | { |
aeafcbaf | 327 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
a2928c42 | 328 | |
aeafcbaf | 329 | if (dso != NULL) { |
6a4694a4 | 330 | int i; |
aeafcbaf ACM |
331 | strcpy(dso->name, name); |
332 | dso__set_long_name(dso, dso->name); | |
333 | dso__set_short_name(dso, dso->name); | |
6a4694a4 | 334 | for (i = 0; i < MAP__NR_TYPES; ++i) |
aeafcbaf | 335 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; |
4dff624a | 336 | dso->cache = RB_ROOT; |
44f24cb3 | 337 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
949d160b | 338 | dso->data_type = DSO_BINARY_TYPE__NOT_FOUND; |
aeafcbaf ACM |
339 | dso->loaded = 0; |
340 | dso->sorted_by_name = 0; | |
341 | dso->has_build_id = 0; | |
342 | dso->kernel = DSO_TYPE_USER; | |
8db4841f | 343 | dso->needs_swap = DSO_SWAP__UNSET; |
aeafcbaf | 344 | INIT_LIST_HEAD(&dso->node); |
a2928c42 ACM |
345 | } |
346 | ||
aeafcbaf | 347 | return dso; |
a2928c42 ACM |
348 | } |
349 | ||
aeafcbaf | 350 | static void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
351 | { |
352 | struct symbol *pos; | |
aeafcbaf | 353 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
354 | |
355 | while (next) { | |
356 | pos = rb_entry(next, struct symbol, rb_node); | |
357 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 358 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 359 | symbol__delete(pos); |
a2928c42 ACM |
360 | } |
361 | } | |
362 | ||
aeafcbaf | 363 | void dso__delete(struct dso *dso) |
a2928c42 | 364 | { |
6a4694a4 ACM |
365 | int i; |
366 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf ACM |
367 | symbols__delete(&dso->symbols[i]); |
368 | if (dso->sname_alloc) | |
369 | free((char *)dso->short_name); | |
370 | if (dso->lname_alloc) | |
371 | free(dso->long_name); | |
4dff624a | 372 | dso_cache__free(&dso->cache); |
aeafcbaf | 373 | free(dso); |
a2928c42 ACM |
374 | } |
375 | ||
aeafcbaf | 376 | void dso__set_build_id(struct dso *dso, void *build_id) |
8d06367f | 377 | { |
aeafcbaf ACM |
378 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); |
379 | dso->has_build_id = 1; | |
8d06367f ACM |
380 | } |
381 | ||
e5a1845f | 382 | void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 383 | { |
aeafcbaf | 384 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 385 | struct rb_node *parent = NULL; |
9cffa8d5 | 386 | const u64 ip = sym->start; |
a2928c42 ACM |
387 | struct symbol *s; |
388 | ||
389 | while (*p != NULL) { | |
390 | parent = *p; | |
391 | s = rb_entry(parent, struct symbol, rb_node); | |
392 | if (ip < s->start) | |
393 | p = &(*p)->rb_left; | |
394 | else | |
395 | p = &(*p)->rb_right; | |
396 | } | |
397 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 398 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
399 | } |
400 | ||
aeafcbaf | 401 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
402 | { |
403 | struct rb_node *n; | |
404 | ||
aeafcbaf | 405 | if (symbols == NULL) |
a2928c42 ACM |
406 | return NULL; |
407 | ||
aeafcbaf | 408 | n = symbols->rb_node; |
a2928c42 ACM |
409 | |
410 | while (n) { | |
411 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
412 | ||
413 | if (ip < s->start) | |
414 | n = n->rb_left; | |
415 | else if (ip > s->end) | |
416 | n = n->rb_right; | |
417 | else | |
418 | return s; | |
419 | } | |
420 | ||
421 | return NULL; | |
422 | } | |
423 | ||
79406cd7 ACM |
424 | struct symbol_name_rb_node { |
425 | struct rb_node rb_node; | |
426 | struct symbol sym; | |
427 | }; | |
428 | ||
aeafcbaf | 429 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 430 | { |
aeafcbaf | 431 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 432 | struct rb_node *parent = NULL; |
02a9d037 RV |
433 | struct symbol_name_rb_node *symn, *s; |
434 | ||
435 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
436 | |
437 | while (*p != NULL) { | |
438 | parent = *p; | |
439 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
440 | if (strcmp(sym->name, s->sym.name) < 0) | |
441 | p = &(*p)->rb_left; | |
442 | else | |
443 | p = &(*p)->rb_right; | |
444 | } | |
445 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 446 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
447 | } |
448 | ||
aeafcbaf ACM |
449 | static void symbols__sort_by_name(struct rb_root *symbols, |
450 | struct rb_root *source) | |
79406cd7 ACM |
451 | { |
452 | struct rb_node *nd; | |
453 | ||
454 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
455 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 456 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
457 | } |
458 | } | |
459 | ||
aeafcbaf ACM |
460 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
461 | const char *name) | |
79406cd7 ACM |
462 | { |
463 | struct rb_node *n; | |
464 | ||
aeafcbaf | 465 | if (symbols == NULL) |
79406cd7 ACM |
466 | return NULL; |
467 | ||
aeafcbaf | 468 | n = symbols->rb_node; |
79406cd7 ACM |
469 | |
470 | while (n) { | |
471 | struct symbol_name_rb_node *s; | |
472 | int cmp; | |
473 | ||
474 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
475 | cmp = strcmp(name, s->sym.name); | |
476 | ||
477 | if (cmp < 0) | |
478 | n = n->rb_left; | |
479 | else if (cmp > 0) | |
480 | n = n->rb_right; | |
481 | else | |
482 | return &s->sym; | |
483 | } | |
484 | ||
485 | return NULL; | |
486 | } | |
487 | ||
aeafcbaf | 488 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 489 | enum map_type type, u64 addr) |
fcf1203a | 490 | { |
aeafcbaf | 491 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
492 | } |
493 | ||
aeafcbaf | 494 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
495 | const char *name) |
496 | { | |
aeafcbaf | 497 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
498 | } |
499 | ||
aeafcbaf | 500 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 501 | { |
aeafcbaf ACM |
502 | dso__set_sorted_by_name(dso, type); |
503 | return symbols__sort_by_name(&dso->symbol_names[type], | |
504 | &dso->symbols[type]); | |
79406cd7 ACM |
505 | } |
506 | ||
aeafcbaf | 507 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
a2928c42 | 508 | { |
8d06367f | 509 | char *bid = bf; |
aeafcbaf | 510 | const u8 *raw = build_id; |
8d06367f | 511 | int i; |
a2928c42 | 512 | |
8d06367f ACM |
513 | for (i = 0; i < len; ++i) { |
514 | sprintf(bid, "%02x", *raw); | |
515 | ++raw; | |
516 | bid += 2; | |
517 | } | |
518 | ||
aeafcbaf | 519 | return raw - build_id; |
8d06367f ACM |
520 | } |
521 | ||
aeafcbaf | 522 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
8d06367f ACM |
523 | { |
524 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f | 525 | |
aeafcbaf | 526 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
9e03eb2d ACM |
527 | return fprintf(fp, "%s", sbuild_id); |
528 | } | |
529 | ||
aeafcbaf ACM |
530 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
531 | enum map_type type, FILE *fp) | |
90f18e63 SD |
532 | { |
533 | size_t ret = 0; | |
534 | struct rb_node *nd; | |
535 | struct symbol_name_rb_node *pos; | |
536 | ||
aeafcbaf | 537 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
538 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
539 | fprintf(fp, "%s\n", pos->sym.name); | |
540 | } | |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
aeafcbaf | 545 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) |
9e03eb2d ACM |
546 | { |
547 | struct rb_node *nd; | |
aeafcbaf | 548 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); |
9e03eb2d | 549 | |
aeafcbaf ACM |
550 | if (dso->short_name != dso->long_name) |
551 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3846df2e | 552 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], |
aeafcbaf ACM |
553 | dso->loaded ? "" : "NOT "); |
554 | ret += dso__fprintf_buildid(dso, fp); | |
6a4694a4 | 555 | ret += fprintf(fp, ")\n"); |
aeafcbaf | 556 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { |
95011c60 ACM |
557 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
558 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
559 | } |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
9e201442 ACM |
564 | int kallsyms__parse(const char *filename, void *arg, |
565 | int (*process_symbol)(void *arg, const char *name, | |
82151520 | 566 | char type, u64 start)) |
a2928c42 | 567 | { |
a2928c42 ACM |
568 | char *line = NULL; |
569 | size_t n; | |
3b01a413 | 570 | int err = -1; |
9e201442 | 571 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
572 | |
573 | if (file == NULL) | |
574 | goto out_failure; | |
575 | ||
3b01a413 ACM |
576 | err = 0; |
577 | ||
a2928c42 | 578 | while (!feof(file)) { |
9cffa8d5 | 579 | u64 start; |
a2928c42 ACM |
580 | int line_len, len; |
581 | char symbol_type; | |
2e538c4a | 582 | char *symbol_name; |
a2928c42 ACM |
583 | |
584 | line_len = getline(&line, &n, file); | |
a1645ce1 | 585 | if (line_len < 0 || !line) |
a2928c42 ACM |
586 | break; |
587 | ||
a2928c42 ACM |
588 | line[--line_len] = '\0'; /* \n */ |
589 | ||
a0055ae2 | 590 | len = hex2u64(line, &start); |
a2928c42 ACM |
591 | |
592 | len++; | |
593 | if (len + 2 >= line_len) | |
594 | continue; | |
595 | ||
31877908 | 596 | symbol_type = line[len]; |
3b01a413 ACM |
597 | len += 2; |
598 | symbol_name = line + len; | |
599 | len = line_len - len; | |
682b335a | 600 | |
3b01a413 ACM |
601 | if (len >= KSYM_NAME_LEN) { |
602 | err = -1; | |
682b335a | 603 | break; |
3b01a413 ACM |
604 | } |
605 | ||
3f5a4272 | 606 | err = process_symbol(arg, symbol_name, |
82151520 | 607 | symbol_type, start); |
3f5a4272 AB |
608 | if (err) |
609 | break; | |
2e538c4a ACM |
610 | } |
611 | ||
612 | free(line); | |
613 | fclose(file); | |
682b335a | 614 | return err; |
2e538c4a | 615 | |
2e538c4a ACM |
616 | out_failure: |
617 | return -1; | |
618 | } | |
619 | ||
682b335a ACM |
620 | struct process_kallsyms_args { |
621 | struct map *map; | |
622 | struct dso *dso; | |
623 | }; | |
624 | ||
c408fedf ACM |
625 | static u8 kallsyms2elf_type(char type) |
626 | { | |
627 | if (type == 'W') | |
628 | return STB_WEAK; | |
629 | ||
630 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
631 | } | |
632 | ||
682b335a | 633 | static int map__process_kallsym_symbol(void *arg, const char *name, |
82151520 | 634 | char type, u64 start) |
682b335a ACM |
635 | { |
636 | struct symbol *sym; | |
637 | struct process_kallsyms_args *a = arg; | |
638 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
639 | ||
640 | if (!symbol_type__is_a(type, a->map->type)) | |
641 | return 0; | |
642 | ||
82151520 CS |
643 | /* |
644 | * module symbols are not sorted so we add all | |
645 | * symbols, setting length to 0, and rely on | |
646 | * symbols__fixup_end() to fix it up. | |
647 | */ | |
648 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); | |
682b335a ACM |
649 | if (sym == NULL) |
650 | return -ENOMEM; | |
651 | /* | |
652 | * We will pass the symbols to the filter later, in | |
653 | * map__split_kallsyms, when we have split the maps per module | |
654 | */ | |
655 | symbols__insert(root, sym); | |
a1645ce1 | 656 | |
682b335a ACM |
657 | return 0; |
658 | } | |
659 | ||
660 | /* | |
661 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
662 | * so that we can in the next step set the symbol ->end address and then | |
663 | * call kernel_maps__split_kallsyms. | |
664 | */ | |
aeafcbaf | 665 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 666 | struct map *map) |
682b335a | 667 | { |
aeafcbaf | 668 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 669 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
670 | } |
671 | ||
2e538c4a ACM |
672 | /* |
673 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
674 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
675 | * the original ELF section names vmlinux have. | |
676 | */ | |
aeafcbaf | 677 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 678 | symbol_filter_t filter) |
2e538c4a | 679 | { |
9de89fe7 | 680 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 681 | struct machine *machine = kmaps->machine; |
4e06255f | 682 | struct map *curr_map = map; |
2e538c4a | 683 | struct symbol *pos; |
8a953312 | 684 | int count = 0, moved = 0; |
aeafcbaf | 685 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 686 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
687 | int kernel_range = 0; |
688 | ||
689 | while (next) { | |
690 | char *module; | |
691 | ||
692 | pos = rb_entry(next, struct symbol, rb_node); | |
693 | next = rb_next(&pos->rb_node); | |
694 | ||
695 | module = strchr(pos->name, '\t'); | |
696 | if (module) { | |
75be6cf4 | 697 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
698 | goto discard_symbol; |
699 | ||
2e538c4a ACM |
700 | *module++ = '\0'; |
701 | ||
b7cece76 | 702 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 703 | if (curr_map != map && |
aeafcbaf | 704 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 705 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
706 | /* |
707 | * We assume all symbols of a module are | |
708 | * continuous in * kallsyms, so curr_map | |
709 | * points to a module and all its | |
710 | * symbols are in its kmap. Mark it as | |
711 | * loaded. | |
712 | */ | |
713 | dso__set_loaded(curr_map->dso, | |
714 | curr_map->type); | |
715 | } | |
716 | ||
717 | curr_map = map_groups__find_by_name(kmaps, | |
718 | map->type, module); | |
4e06255f | 719 | if (curr_map == NULL) { |
2f51903b | 720 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 721 | "inconsistency while looking " |
a1645ce1 | 722 | "for \"%s\" module!\n", |
23346f21 | 723 | machine->root_dir, module); |
a1645ce1 ZY |
724 | curr_map = map; |
725 | goto discard_symbol; | |
af427bf5 | 726 | } |
b7cece76 | 727 | |
a1645ce1 | 728 | if (curr_map->dso->loaded && |
23346f21 | 729 | !machine__is_default_guest(machine)) |
b7cece76 | 730 | goto discard_symbol; |
af427bf5 | 731 | } |
2e538c4a ACM |
732 | /* |
733 | * So that we look just like we get from .ko files, | |
734 | * i.e. not prelinked, relative to map->start. | |
735 | */ | |
4e06255f ACM |
736 | pos->start = curr_map->map_ip(curr_map, pos->start); |
737 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
738 | } else if (curr_map != map) { | |
2e538c4a | 739 | char dso_name[PATH_MAX]; |
aeafcbaf | 740 | struct dso *ndso; |
2e538c4a | 741 | |
8a953312 ACM |
742 | if (count == 0) { |
743 | curr_map = map; | |
744 | goto filter_symbol; | |
745 | } | |
746 | ||
aeafcbaf | 747 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
748 | snprintf(dso_name, sizeof(dso_name), |
749 | "[guest.kernel].%d", | |
750 | kernel_range++); | |
751 | else | |
752 | snprintf(dso_name, sizeof(dso_name), | |
753 | "[kernel].%d", | |
754 | kernel_range++); | |
2e538c4a | 755 | |
aeafcbaf ACM |
756 | ndso = dso__new(dso_name); |
757 | if (ndso == NULL) | |
2e538c4a ACM |
758 | return -1; |
759 | ||
aeafcbaf | 760 | ndso->kernel = dso->kernel; |
a1645ce1 | 761 | |
aeafcbaf | 762 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 763 | if (curr_map == NULL) { |
aeafcbaf | 764 | dso__delete(ndso); |
2e538c4a ACM |
765 | return -1; |
766 | } | |
a2928c42 | 767 | |
4e06255f | 768 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 769 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
770 | ++kernel_range; |
771 | } | |
8a953312 | 772 | filter_symbol: |
4e06255f | 773 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 774 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 775 | symbol__delete(pos); |
2e538c4a | 776 | } else { |
4e06255f ACM |
777 | if (curr_map != map) { |
778 | rb_erase(&pos->rb_node, root); | |
779 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
780 | ++moved; |
781 | } else | |
782 | ++count; | |
9974f496 | 783 | } |
a2928c42 ACM |
784 | } |
785 | ||
a1645ce1 | 786 | if (curr_map != map && |
aeafcbaf | 787 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 788 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
789 | dso__set_loaded(curr_map->dso, curr_map->type); |
790 | } | |
791 | ||
8a953312 | 792 | return count + moved; |
2e538c4a | 793 | } |
a2928c42 | 794 | |
ec80fde7 ACM |
795 | static bool symbol__restricted_filename(const char *filename, |
796 | const char *restricted_filename) | |
797 | { | |
798 | bool restricted = false; | |
799 | ||
800 | if (symbol_conf.kptr_restrict) { | |
801 | char *r = realpath(filename, NULL); | |
802 | ||
803 | if (r != NULL) { | |
804 | restricted = strcmp(r, restricted_filename) == 0; | |
805 | free(r); | |
806 | return restricted; | |
807 | } | |
808 | } | |
809 | ||
810 | return restricted; | |
811 | } | |
812 | ||
aeafcbaf | 813 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 814 | struct map *map, symbol_filter_t filter) |
2e538c4a | 815 | { |
ec80fde7 ACM |
816 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
817 | return -1; | |
818 | ||
aeafcbaf | 819 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
820 | return -1; |
821 | ||
694bf407 | 822 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
823 | symbols__fixup_end(&dso->symbols[map->type]); |
824 | ||
aeafcbaf | 825 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 826 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 827 | else |
44f24cb3 | 828 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 829 | |
aeafcbaf | 830 | return dso__split_kallsyms(dso, map, filter); |
af427bf5 ACM |
831 | } |
832 | ||
aeafcbaf | 833 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 834 | symbol_filter_t filter) |
80d496be PE |
835 | { |
836 | char *line = NULL; | |
837 | size_t n; | |
838 | FILE *file; | |
839 | int nr_syms = 0; | |
840 | ||
aeafcbaf | 841 | file = fopen(dso->long_name, "r"); |
80d496be PE |
842 | if (file == NULL) |
843 | goto out_failure; | |
844 | ||
845 | while (!feof(file)) { | |
9cffa8d5 | 846 | u64 start, size; |
80d496be PE |
847 | struct symbol *sym; |
848 | int line_len, len; | |
849 | ||
850 | line_len = getline(&line, &n, file); | |
851 | if (line_len < 0) | |
852 | break; | |
853 | ||
854 | if (!line) | |
855 | goto out_failure; | |
856 | ||
857 | line[--line_len] = '\0'; /* \n */ | |
858 | ||
859 | len = hex2u64(line, &start); | |
860 | ||
861 | len++; | |
862 | if (len + 2 >= line_len) | |
863 | continue; | |
864 | ||
865 | len += hex2u64(line + len, &size); | |
866 | ||
867 | len++; | |
868 | if (len + 2 >= line_len) | |
869 | continue; | |
870 | ||
c408fedf | 871 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
872 | |
873 | if (sym == NULL) | |
874 | goto out_delete_line; | |
875 | ||
439d473b | 876 | if (filter && filter(map, sym)) |
00a192b3 | 877 | symbol__delete(sym); |
80d496be | 878 | else { |
aeafcbaf | 879 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
880 | nr_syms++; |
881 | } | |
882 | } | |
883 | ||
884 | free(line); | |
885 | fclose(file); | |
886 | ||
887 | return nr_syms; | |
888 | ||
889 | out_delete_line: | |
890 | free(line); | |
891 | out_failure: | |
892 | return -1; | |
893 | } | |
894 | ||
e5a1845f | 895 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) |
78075caa | 896 | { |
aeafcbaf | 897 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; |
78075caa ACM |
898 | } |
899 | ||
a1645ce1 | 900 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 901 | { |
e30a3d12 | 902 | bool have_build_id = false; |
57f395a7 FW |
903 | struct dso *pos; |
904 | ||
6122e4e4 ACM |
905 | list_for_each_entry(pos, head, node) { |
906 | if (with_hits && !pos->hit) | |
907 | continue; | |
f6e1467d ACM |
908 | if (pos->has_build_id) { |
909 | have_build_id = true; | |
910 | continue; | |
911 | } | |
e30a3d12 ACM |
912 | if (filename__read_build_id(pos->long_name, pos->build_id, |
913 | sizeof(pos->build_id)) > 0) { | |
914 | have_build_id = true; | |
915 | pos->has_build_id = true; | |
916 | } | |
6122e4e4 | 917 | } |
57f395a7 | 918 | |
e30a3d12 | 919 | return have_build_id; |
57f395a7 FW |
920 | } |
921 | ||
aeafcbaf | 922 | char dso__symtab_origin(const struct dso *dso) |
94cb9e38 ACM |
923 | { |
924 | static const char origin[] = { | |
44f24cb3 | 925 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
21ea4539 | 926 | [DSO_BINARY_TYPE__VMLINUX] = 'v', |
44f24cb3 JO |
927 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', |
928 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
929 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
930 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
931 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
932 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
933 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
934 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
935 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', | |
936 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
21ea4539 | 937 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
94cb9e38 ACM |
938 | }; |
939 | ||
44f24cb3 | 940 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) |
94cb9e38 | 941 | return '!'; |
aeafcbaf | 942 | return origin[dso->symtab_type]; |
94cb9e38 ACM |
943 | } |
944 | ||
44f24cb3 JO |
945 | int dso__binary_type_file(struct dso *dso, enum dso_binary_type type, |
946 | char *root_dir, char *file, size_t size) | |
947 | { | |
948 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
949 | int ret = 0; | |
950 | ||
951 | switch (type) { | |
952 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
953 | char *debuglink; | |
954 | ||
955 | strncpy(file, dso->long_name, size); | |
956 | debuglink = file + dso->long_name_len; | |
957 | while (debuglink != file && *debuglink != '/') | |
958 | debuglink--; | |
959 | if (*debuglink == '/') | |
960 | debuglink++; | |
961 | filename__read_debuglink(dso->long_name, debuglink, | |
962 | size - (debuglink - file)); | |
963 | } | |
964 | break; | |
965 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
966 | /* skip the locally configured cache if a symfs is given */ | |
967 | if (symbol_conf.symfs[0] || | |
968 | (dso__build_id_filename(dso, file, size) == NULL)) | |
969 | ret = -1; | |
970 | break; | |
971 | ||
972 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
973 | snprintf(file, size, "%s/usr/lib/debug%s.debug", | |
974 | symbol_conf.symfs, dso->long_name); | |
975 | break; | |
976 | ||
977 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
978 | snprintf(file, size, "%s/usr/lib/debug%s", | |
979 | symbol_conf.symfs, dso->long_name); | |
980 | break; | |
981 | ||
982 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
983 | if (!dso->has_build_id) { | |
984 | ret = -1; | |
985 | break; | |
986 | } | |
987 | ||
988 | build_id__sprintf(dso->build_id, | |
989 | sizeof(dso->build_id), | |
990 | build_id_hex); | |
991 | snprintf(file, size, | |
992 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", | |
993 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
994 | break; | |
995 | ||
996 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
997 | snprintf(file, size, "%s%s", | |
998 | symbol_conf.symfs, dso->long_name); | |
999 | break; | |
1000 | ||
1001 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
1002 | snprintf(file, size, "%s%s%s", symbol_conf.symfs, | |
1003 | root_dir, dso->long_name); | |
1004 | break; | |
1005 | ||
1006 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
1007 | snprintf(file, size, "%s%s", symbol_conf.symfs, | |
1008 | dso->long_name); | |
1009 | break; | |
1010 | ||
1011 | default: | |
1012 | case DSO_BINARY_TYPE__KALLSYMS: | |
21ea4539 | 1013 | case DSO_BINARY_TYPE__VMLINUX: |
44f24cb3 | 1014 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
21ea4539 | 1015 | case DSO_BINARY_TYPE__GUEST_VMLINUX: |
44f24cb3 JO |
1016 | case DSO_BINARY_TYPE__JAVA_JIT: |
1017 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1018 | ret = -1; | |
1019 | break; | |
1020 | } | |
1021 | ||
1022 | return ret; | |
1023 | } | |
1024 | ||
aeafcbaf | 1025 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1026 | { |
c338aee8 | 1027 | char *name; |
a2928c42 | 1028 | int ret = -1; |
44f24cb3 | 1029 | u_int i; |
23346f21 | 1030 | struct machine *machine; |
44f24cb3 | 1031 | char *root_dir = (char *) ""; |
3aafe5ae CS |
1032 | int ss_pos = 0; |
1033 | struct symsrc ss_[2]; | |
1034 | struct symsrc *syms_ss = NULL, *runtime_ss = NULL; | |
a2928c42 | 1035 | |
aeafcbaf | 1036 | dso__set_loaded(dso, map->type); |
66bd8424 | 1037 | |
aeafcbaf ACM |
1038 | if (dso->kernel == DSO_TYPE_KERNEL) |
1039 | return dso__load_kernel_sym(dso, map, filter); | |
1040 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1041 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1042 | |
23346f21 ACM |
1043 | if (map->groups && map->groups->machine) |
1044 | machine = map->groups->machine; | |
a1645ce1 | 1045 | else |
23346f21 | 1046 | machine = NULL; |
c338aee8 | 1047 | |
44f24cb3 | 1048 | name = malloc(PATH_MAX); |
a2928c42 ACM |
1049 | if (!name) |
1050 | return -1; | |
1051 | ||
aeafcbaf | 1052 | dso->adjust_symbols = 0; |
f5812a7a | 1053 | |
aeafcbaf | 1054 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1055 | struct stat st; |
1056 | ||
e9b52ef2 | 1057 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1058 | return -1; |
1059 | ||
1060 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1061 | pr_warning("File %s not owned by current user or root, " | |
1062 | "ignoring it.\n", dso->name); | |
1063 | return -1; | |
1064 | } | |
1065 | ||
aeafcbaf | 1066 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1067 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1068 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1069 | return ret; |
1070 | } | |
1071 | ||
44f24cb3 JO |
1072 | if (machine) |
1073 | root_dir = machine->root_dir; | |
1074 | ||
6da80ce8 | 1075 | /* Iterate over candidate debug images. |
3aafe5ae CS |
1076 | * Keep track of "interesting" ones (those which have a symtab, dynsym, |
1077 | * and/or opd section) for processing. | |
6da80ce8 | 1078 | */ |
44f24cb3 | 1079 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
3aafe5ae CS |
1080 | struct symsrc *ss = &ss_[ss_pos]; |
1081 | bool next_slot = false; | |
6da80ce8 | 1082 | |
005f9294 | 1083 | enum dso_binary_type symtab_type = binary_type_symtab[i]; |
ec5761ea | 1084 | |
005f9294 | 1085 | if (dso__binary_type_file(dso, symtab_type, |
44f24cb3 JO |
1086 | root_dir, name, PATH_MAX)) |
1087 | continue; | |
6da80ce8 DM |
1088 | |
1089 | /* Name is now the name of the next image to try */ | |
3aafe5ae | 1090 | if (symsrc__init(ss, dso, name, symtab_type) < 0) |
6da80ce8 | 1091 | continue; |
a2928c42 | 1092 | |
3aafe5ae CS |
1093 | if (!syms_ss && symsrc__has_symtab(ss)) { |
1094 | syms_ss = ss; | |
1095 | next_slot = true; | |
d26cd12b CS |
1096 | } |
1097 | ||
3aafe5ae CS |
1098 | if (!runtime_ss && symsrc__possibly_runtime(ss)) { |
1099 | runtime_ss = ss; | |
1100 | next_slot = true; | |
a44f605b | 1101 | } |
a2928c42 | 1102 | |
3aafe5ae CS |
1103 | if (next_slot) { |
1104 | ss_pos++; | |
33ff581e | 1105 | |
3aafe5ae CS |
1106 | if (syms_ss && runtime_ss) |
1107 | break; | |
6da80ce8 | 1108 | } |
3aafe5ae | 1109 | |
a25e46c4 | 1110 | } |
6da80ce8 | 1111 | |
3aafe5ae CS |
1112 | if (!runtime_ss && !syms_ss) |
1113 | goto out_free; | |
1114 | ||
1115 | if (runtime_ss && !syms_ss) { | |
1116 | syms_ss = runtime_ss; | |
1117 | } | |
1118 | ||
1119 | /* We'll have to hope for the best */ | |
1120 | if (!runtime_ss && syms_ss) | |
1121 | runtime_ss = syms_ss; | |
1122 | ||
1123 | if (syms_ss) | |
1124 | ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, 0); | |
1125 | else | |
1126 | ret = -1; | |
1127 | ||
f47b58b7 | 1128 | if (ret > 0) { |
3aafe5ae CS |
1129 | int nr_plt; |
1130 | ||
1131 | nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); | |
1132 | if (nr_plt > 0) | |
1133 | ret += nr_plt; | |
60e4b10c ACM |
1134 | } |
1135 | ||
3aafe5ae CS |
1136 | for (; ss_pos > 0; ss_pos--) |
1137 | symsrc__destroy(&ss_[ss_pos - 1]); | |
1138 | out_free: | |
a2928c42 | 1139 | free(name); |
aeafcbaf | 1140 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1141 | return 0; |
a2928c42 ACM |
1142 | return ret; |
1143 | } | |
1144 | ||
aeafcbaf | 1145 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1146 | enum map_type type, const char *name) |
439d473b ACM |
1147 | { |
1148 | struct rb_node *nd; | |
1149 | ||
aeafcbaf | 1150 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1151 | struct map *map = rb_entry(nd, struct map, rb_node); |
1152 | ||
b7cece76 | 1153 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1154 | return map; |
1155 | } | |
1156 | ||
1157 | return NULL; | |
1158 | } | |
1159 | ||
aeafcbaf ACM |
1160 | static int dso__kernel_module_get_build_id(struct dso *dso, |
1161 | const char *root_dir) | |
b7cece76 ACM |
1162 | { |
1163 | char filename[PATH_MAX]; | |
1164 | /* | |
1165 | * kernel module short names are of the form "[module]" and | |
1166 | * we need just "module" here. | |
1167 | */ | |
aeafcbaf | 1168 | const char *name = dso->short_name + 1; |
b7cece76 ACM |
1169 | |
1170 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1171 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1172 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 | 1173 | |
aeafcbaf ACM |
1174 | if (sysfs__read_build_id(filename, dso->build_id, |
1175 | sizeof(dso->build_id)) == 0) | |
1176 | dso->has_build_id = true; | |
b7cece76 ACM |
1177 | |
1178 | return 0; | |
1179 | } | |
1180 | ||
aeafcbaf | 1181 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
a1645ce1 | 1182 | const char *dir_name) |
6cfcc53e | 1183 | { |
439d473b | 1184 | struct dirent *dent; |
5aab621b | 1185 | DIR *dir = opendir(dir_name); |
74534341 | 1186 | int ret = 0; |
6cfcc53e | 1187 | |
439d473b | 1188 | if (!dir) { |
5aab621b | 1189 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1190 | return -1; |
1191 | } | |
6cfcc53e | 1192 | |
439d473b ACM |
1193 | while ((dent = readdir(dir)) != NULL) { |
1194 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1195 | struct stat st; |
1196 | ||
1197 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
2b600f95 | 1198 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); |
a1645ce1 ZY |
1199 | if (stat(path, &st)) |
1200 | continue; | |
439d473b | 1201 | |
a1645ce1 | 1202 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1203 | if (!strcmp(dent->d_name, ".") || |
1204 | !strcmp(dent->d_name, "..")) | |
1205 | continue; | |
1206 | ||
aeafcbaf | 1207 | ret = map_groups__set_modules_path_dir(mg, path); |
74534341 GJ |
1208 | if (ret < 0) |
1209 | goto out; | |
439d473b ACM |
1210 | } else { |
1211 | char *dot = strrchr(dent->d_name, '.'), | |
1212 | dso_name[PATH_MAX]; | |
1213 | struct map *map; | |
cfc10d3b | 1214 | char *long_name; |
439d473b ACM |
1215 | |
1216 | if (dot == NULL || strcmp(dot, ".ko")) | |
1217 | continue; | |
1218 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1219 | (int)(dot - dent->d_name), dent->d_name); | |
1220 | ||
a2a99e8e | 1221 | strxfrchar(dso_name, '-', '_'); |
aeafcbaf ACM |
1222 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
1223 | dso_name); | |
439d473b ACM |
1224 | if (map == NULL) |
1225 | continue; | |
1226 | ||
cfc10d3b | 1227 | long_name = strdup(path); |
74534341 GJ |
1228 | if (long_name == NULL) { |
1229 | ret = -1; | |
1230 | goto out; | |
1231 | } | |
cfc10d3b | 1232 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1233 | map->dso->lname_alloc = 1; |
a1645ce1 | 1234 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1235 | } |
439d473b | 1236 | } |
6cfcc53e | 1237 | |
74534341 | 1238 | out: |
439d473b | 1239 | closedir(dir); |
74534341 | 1240 | return ret; |
439d473b | 1241 | } |
6cfcc53e | 1242 | |
a1645ce1 | 1243 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1244 | { |
a1645ce1 ZY |
1245 | char version[PATH_MAX]; |
1246 | FILE *file; | |
1247 | char *name, *tmp; | |
1248 | const char *prefix = "Linux version "; | |
1249 | ||
1250 | sprintf(version, "%s/proc/version", root_dir); | |
1251 | file = fopen(version, "r"); | |
1252 | if (!file) | |
1253 | return NULL; | |
1254 | ||
1255 | version[0] = '\0'; | |
1256 | tmp = fgets(version, sizeof(version), file); | |
1257 | fclose(file); | |
1258 | ||
1259 | name = strstr(version, prefix); | |
1260 | if (!name) | |
1261 | return NULL; | |
1262 | name += strlen(prefix); | |
1263 | tmp = strchr(name, ' '); | |
1264 | if (tmp) | |
1265 | *tmp = '\0'; | |
1266 | ||
1267 | return strdup(name); | |
1268 | } | |
1269 | ||
aeafcbaf | 1270 | static int machine__set_modules_path(struct machine *machine) |
a1645ce1 ZY |
1271 | { |
1272 | char *version; | |
439d473b | 1273 | char modules_path[PATH_MAX]; |
6cfcc53e | 1274 | |
aeafcbaf | 1275 | version = get_kernel_version(machine->root_dir); |
a1645ce1 | 1276 | if (!version) |
439d473b | 1277 | return -1; |
6cfcc53e | 1278 | |
a1645ce1 | 1279 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
aeafcbaf | 1280 | machine->root_dir, version); |
a1645ce1 | 1281 | free(version); |
6cfcc53e | 1282 | |
aeafcbaf | 1283 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
6cfcc53e MG |
1284 | } |
1285 | ||
aeafcbaf | 1286 | struct map *machine__new_module(struct machine *machine, u64 start, |
d28c6223 | 1287 | const char *filename) |
b7cece76 ACM |
1288 | { |
1289 | struct map *map; | |
aeafcbaf | 1290 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
1291 | |
1292 | if (dso == NULL) | |
1293 | return NULL; | |
1294 | ||
1295 | map = map__new2(start, dso, MAP__FUNCTION); | |
1296 | if (map == NULL) | |
1297 | return NULL; | |
1298 | ||
aeafcbaf | 1299 | if (machine__is_host(machine)) |
44f24cb3 | 1300 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; |
a1645ce1 | 1301 | else |
44f24cb3 | 1302 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; |
aeafcbaf | 1303 | map_groups__insert(&machine->kmaps, map); |
b7cece76 ACM |
1304 | return map; |
1305 | } | |
1306 | ||
aeafcbaf | 1307 | static int machine__create_modules(struct machine *machine) |
439d473b ACM |
1308 | { |
1309 | char *line = NULL; | |
1310 | size_t n; | |
a1645ce1 | 1311 | FILE *file; |
439d473b | 1312 | struct map *map; |
a1645ce1 ZY |
1313 | const char *modules; |
1314 | char path[PATH_MAX]; | |
1315 | ||
aeafcbaf | 1316 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
1317 | modules = symbol_conf.default_guest_modules; |
1318 | else { | |
aeafcbaf | 1319 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
1320 | modules = path; |
1321 | } | |
6cfcc53e | 1322 | |
ec80fde7 ACM |
1323 | if (symbol__restricted_filename(path, "/proc/modules")) |
1324 | return -1; | |
1325 | ||
a1645ce1 | 1326 | file = fopen(modules, "r"); |
439d473b ACM |
1327 | if (file == NULL) |
1328 | return -1; | |
6cfcc53e | 1329 | |
439d473b ACM |
1330 | while (!feof(file)) { |
1331 | char name[PATH_MAX]; | |
1332 | u64 start; | |
439d473b ACM |
1333 | char *sep; |
1334 | int line_len; | |
6cfcc53e | 1335 | |
439d473b ACM |
1336 | line_len = getline(&line, &n, file); |
1337 | if (line_len < 0) | |
1338 | break; | |
1339 | ||
1340 | if (!line) | |
1341 | goto out_failure; | |
1342 | ||
1343 | line[--line_len] = '\0'; /* \n */ | |
1344 | ||
1345 | sep = strrchr(line, 'x'); | |
1346 | if (sep == NULL) | |
1347 | continue; | |
1348 | ||
1349 | hex2u64(sep + 1, &start); | |
1350 | ||
1351 | sep = strchr(line, ' '); | |
1352 | if (sep == NULL) | |
1353 | continue; | |
1354 | ||
1355 | *sep = '\0'; | |
1356 | ||
1357 | snprintf(name, sizeof(name), "[%s]", line); | |
aeafcbaf | 1358 | map = machine__new_module(machine, start, name); |
b7cece76 | 1359 | if (map == NULL) |
439d473b | 1360 | goto out_delete_line; |
aeafcbaf | 1361 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
6cfcc53e | 1362 | } |
439d473b ACM |
1363 | |
1364 | free(line); | |
1365 | fclose(file); | |
1366 | ||
aeafcbaf | 1367 | return machine__set_modules_path(machine); |
439d473b ACM |
1368 | |
1369 | out_delete_line: | |
1370 | free(line); | |
1371 | out_failure: | |
1372 | return -1; | |
6cfcc53e MG |
1373 | } |
1374 | ||
aeafcbaf | 1375 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 1376 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1377 | { |
b68e2f91 CS |
1378 | int err = -1; |
1379 | struct symsrc ss; | |
ec5761ea | 1380 | char symfs_vmlinux[PATH_MAX]; |
005f9294 | 1381 | enum dso_binary_type symtab_type; |
a2928c42 | 1382 | |
a639dc64 | 1383 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea | 1384 | symbol_conf.symfs, vmlinux); |
a2928c42 | 1385 | |
21ea4539 | 1386 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
005f9294 | 1387 | symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; |
21ea4539 | 1388 | else |
005f9294 | 1389 | symtab_type = DSO_BINARY_TYPE__VMLINUX; |
21ea4539 | 1390 | |
005f9294 | 1391 | if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) |
b68e2f91 CS |
1392 | return -1; |
1393 | ||
261360b6 | 1394 | err = dso__load_sym(dso, map, &ss, &ss, filter, 0); |
b68e2f91 | 1395 | symsrc__destroy(&ss); |
a2928c42 | 1396 | |
515850e4 CS |
1397 | if (err > 0) { |
1398 | dso__set_long_name(dso, (char *)vmlinux); | |
1399 | dso__set_loaded(dso, map->type); | |
ec5761ea | 1400 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
515850e4 | 1401 | } |
3846df2e | 1402 | |
a2928c42 ACM |
1403 | return err; |
1404 | } | |
1405 | ||
aeafcbaf | 1406 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1407 | symbol_filter_t filter) |
a19afe46 ACM |
1408 | { |
1409 | int i, err = 0; | |
5ad90e4e | 1410 | char *filename; |
a19afe46 ACM |
1411 | |
1412 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1413 | vmlinux_path__nr_entries + 1); |
1414 | ||
aeafcbaf | 1415 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1416 | if (filename != NULL) { |
aeafcbaf | 1417 | err = dso__load_vmlinux(dso, map, filename, filter); |
261ee821 | 1418 | if (err > 0) |
5ad90e4e | 1419 | goto out; |
5ad90e4e ACM |
1420 | free(filename); |
1421 | } | |
a19afe46 ACM |
1422 | |
1423 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 1424 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 1425 | if (err > 0) { |
aeafcbaf | 1426 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
a19afe46 ACM |
1427 | break; |
1428 | } | |
1429 | } | |
5ad90e4e | 1430 | out: |
a19afe46 ACM |
1431 | return err; |
1432 | } | |
1433 | ||
aeafcbaf | 1434 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1435 | symbol_filter_t filter) |
a827c875 | 1436 | { |
cc612d81 | 1437 | int err; |
9e201442 ACM |
1438 | const char *kallsyms_filename = NULL; |
1439 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1440 | /* |
b226a5a7 DA |
1441 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1442 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1443 | * |
1444 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1445 | * build-id, or if the user specifies the wrong path to the right | |
1446 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1447 | * x86_86 one, on the machine where analysis is being performed, say), | |
1448 | * or worse, /proc/kallsyms. | |
1449 | * | |
1450 | * If the specified file _has_ a build-id and there is a build-id | |
1451 | * section in the perf.data file, we will still do the expected | |
1452 | * validation in dso__load_vmlinux and will bail out if they don't | |
1453 | * match. | |
1454 | */ | |
b226a5a7 DA |
1455 | if (symbol_conf.kallsyms_name != NULL) { |
1456 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1457 | goto do_kallsyms; | |
1458 | } | |
1459 | ||
dc8d6ab2 | 1460 | if (symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 1461 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 1462 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 1463 | if (err > 0) { |
aeafcbaf | 1464 | dso__set_long_name(dso, |
e7dadc00 ACM |
1465 | strdup(symbol_conf.vmlinux_name)); |
1466 | goto out_fixup; | |
1467 | } | |
1468 | return err; | |
dc8d6ab2 | 1469 | } |
cc612d81 ACM |
1470 | |
1471 | if (vmlinux_path != NULL) { | |
aeafcbaf | 1472 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 ACM |
1473 | if (err > 0) |
1474 | goto out_fixup; | |
cc612d81 ACM |
1475 | } |
1476 | ||
ec5761ea DA |
1477 | /* do not try local files if a symfs was given */ |
1478 | if (symbol_conf.symfs[0] != 0) | |
1479 | return -1; | |
1480 | ||
b7cece76 ACM |
1481 | /* |
1482 | * Say the kernel DSO was created when processing the build-id header table, | |
1483 | * we have a build-id, so check if it is the same as the running kernel, | |
1484 | * using it if it is. | |
1485 | */ | |
aeafcbaf | 1486 | if (dso->has_build_id) { |
b7cece76 | 1487 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 1488 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1489 | |
1490 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1491 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 1492 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 1493 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 1494 | goto do_kallsyms; |
9e201442 | 1495 | } |
8d0591f6 | 1496 | } |
dc8d6ab2 ACM |
1497 | /* |
1498 | * Now look if we have it on the build-id cache in | |
1499 | * $HOME/.debug/[kernel.kallsyms]. | |
1500 | */ | |
aeafcbaf | 1501 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
1502 | sbuild_id); |
1503 | ||
1504 | if (asprintf(&kallsyms_allocated_filename, | |
1505 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1506 | getenv("HOME"), sbuild_id) == -1) { |
1507 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1508 | return -1; |
3846df2e | 1509 | } |
dc8d6ab2 | 1510 | |
19fc2ded ACM |
1511 | kallsyms_filename = kallsyms_allocated_filename; |
1512 | ||
dc8d6ab2 | 1513 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1514 | pr_err("No kallsyms or vmlinux with build-id %s " |
1515 | "was found\n", sbuild_id); | |
9e201442 | 1516 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1517 | return -1; |
9e201442 | 1518 | } |
dc8d6ab2 ACM |
1519 | } else { |
1520 | /* | |
1521 | * Last resort, if we don't have a build-id and couldn't find | |
1522 | * any vmlinux file, try the running kernel kallsyms table. | |
1523 | */ | |
9e201442 | 1524 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1525 | } |
439d473b | 1526 | |
cc612d81 | 1527 | do_kallsyms: |
aeafcbaf | 1528 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
1529 | if (err > 0) |
1530 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1531 | free(kallsyms_allocated_filename); |
439d473b ACM |
1532 | |
1533 | if (err > 0) { | |
0a0317b4 | 1534 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
cc612d81 | 1535 | out_fixup: |
6a4694a4 ACM |
1536 | map__fixup_start(map); |
1537 | map__fixup_end(map); | |
439d473b | 1538 | } |
94cb9e38 | 1539 | |
a827c875 ACM |
1540 | return err; |
1541 | } | |
1542 | ||
aeafcbaf ACM |
1543 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
1544 | symbol_filter_t filter) | |
a1645ce1 ZY |
1545 | { |
1546 | int err; | |
1547 | const char *kallsyms_filename = NULL; | |
23346f21 | 1548 | struct machine *machine; |
a1645ce1 ZY |
1549 | char path[PATH_MAX]; |
1550 | ||
1551 | if (!map->groups) { | |
1552 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1553 | return -1; | |
1554 | } | |
23346f21 | 1555 | machine = map->groups->machine; |
a1645ce1 | 1556 | |
23346f21 | 1557 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1558 | /* |
1559 | * if the user specified a vmlinux filename, use it and only | |
1560 | * it, reporting errors to the user if it cannot be used. | |
1561 | * Or use file guest_kallsyms inputted by user on commandline | |
1562 | */ | |
1563 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 1564 | err = dso__load_vmlinux(dso, map, |
a1645ce1 ZY |
1565 | symbol_conf.default_guest_vmlinux_name, filter); |
1566 | goto out_try_fixup; | |
1567 | } | |
1568 | ||
1569 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1570 | if (!kallsyms_filename) | |
1571 | return -1; | |
1572 | } else { | |
23346f21 | 1573 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1574 | kallsyms_filename = path; |
1575 | } | |
1576 | ||
aeafcbaf | 1577 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
a1645ce1 ZY |
1578 | if (err > 0) |
1579 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1580 | ||
1581 | out_try_fixup: | |
1582 | if (err > 0) { | |
1583 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 1584 | machine__mmap_name(machine, path, sizeof(path)); |
aeafcbaf | 1585 | dso__set_long_name(dso, strdup(path)); |
a1645ce1 ZY |
1586 | } |
1587 | map__fixup_start(map); | |
1588 | map__fixup_end(map); | |
1589 | } | |
1590 | ||
1591 | return err; | |
1592 | } | |
cd84c2ac | 1593 | |
e5a1845f | 1594 | void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1595 | { |
b0da954a | 1596 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1597 | } |
1598 | ||
1c4be9ff | 1599 | struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1600 | { |
1601 | struct dso *pos; | |
1602 | ||
b0da954a | 1603 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1604 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1605 | return pos; |
1606 | return NULL; | |
1607 | } | |
1608 | ||
a89e5abe | 1609 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1610 | { |
a89e5abe | 1611 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 1612 | |
e4204992 | 1613 | if (!dso) { |
00a192b3 | 1614 | dso = dso__new(name); |
cfc10d3b | 1615 | if (dso != NULL) { |
a89e5abe | 1616 | dsos__add(head, dso); |
cfc10d3b ACM |
1617 | dso__set_basename(dso); |
1618 | } | |
66bd8424 | 1619 | } |
cd84c2ac FW |
1620 | |
1621 | return dso; | |
cd84c2ac FW |
1622 | } |
1623 | ||
1f626bc3 | 1624 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1625 | { |
1626 | struct dso *pos; | |
cbf69680 | 1627 | size_t ret = 0; |
cd84c2ac | 1628 | |
95011c60 ACM |
1629 | list_for_each_entry(pos, head, node) { |
1630 | int i; | |
1631 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 1632 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 1633 | } |
cbf69680 ACM |
1634 | |
1635 | return ret; | |
cd84c2ac FW |
1636 | } |
1637 | ||
aeafcbaf | 1638 | size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp) |
b0da954a | 1639 | { |
a1645ce1 | 1640 | struct rb_node *nd; |
cbf69680 | 1641 | size_t ret = 0; |
a1645ce1 | 1642 | |
aeafcbaf | 1643 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 1644 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
1645 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
1646 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 1647 | } |
cbf69680 ACM |
1648 | |
1649 | return ret; | |
b0da954a ACM |
1650 | } |
1651 | ||
88d3d9b7 ACM |
1652 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
1653 | bool with_hits) | |
9e03eb2d ACM |
1654 | { |
1655 | struct dso *pos; | |
1656 | size_t ret = 0; | |
1657 | ||
b0da954a | 1658 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
1659 | if (with_hits && !pos->hit) |
1660 | continue; | |
9e03eb2d | 1661 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1662 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1663 | } |
1664 | return ret; | |
1665 | } | |
1666 | ||
aeafcbaf ACM |
1667 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
1668 | bool with_hits) | |
f869097e | 1669 | { |
aeafcbaf ACM |
1670 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) + |
1671 | __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits); | |
f869097e ACM |
1672 | } |
1673 | ||
aeafcbaf ACM |
1674 | size_t machines__fprintf_dsos_buildid(struct rb_root *machines, |
1675 | FILE *fp, bool with_hits) | |
b0da954a | 1676 | { |
a1645ce1 ZY |
1677 | struct rb_node *nd; |
1678 | size_t ret = 0; | |
1679 | ||
aeafcbaf | 1680 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 1681 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 1682 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
1683 | } |
1684 | return ret; | |
b0da954a ACM |
1685 | } |
1686 | ||
f57b05ed JO |
1687 | static struct dso* |
1688 | dso__kernel_findnew(struct machine *machine, const char *name, | |
1689 | const char *short_name, int dso_type) | |
fd1d908c | 1690 | { |
f57b05ed JO |
1691 | /* |
1692 | * The kernel dso could be created by build_id processing. | |
1693 | */ | |
1694 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
a1645ce1 | 1695 | |
f57b05ed JO |
1696 | /* |
1697 | * We need to run this in all cases, since during the build_id | |
1698 | * processing we had no idea this was the kernel dso. | |
1699 | */ | |
aeafcbaf | 1700 | if (dso != NULL) { |
f57b05ed JO |
1701 | dso__set_short_name(dso, short_name); |
1702 | dso->kernel = dso_type; | |
fd1d908c ACM |
1703 | } |
1704 | ||
aeafcbaf | 1705 | return dso; |
fd1d908c ACM |
1706 | } |
1707 | ||
aeafcbaf | 1708 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
fd1d908c | 1709 | { |
a1645ce1 ZY |
1710 | char path[PATH_MAX]; |
1711 | ||
23346f21 | 1712 | if (machine__is_default_guest(machine)) |
a1645ce1 | 1713 | return; |
23346f21 | 1714 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
aeafcbaf ACM |
1715 | if (sysfs__read_build_id(path, dso->build_id, |
1716 | sizeof(dso->build_id)) == 0) | |
1717 | dso->has_build_id = true; | |
fd1d908c ACM |
1718 | } |
1719 | ||
f57b05ed | 1720 | static struct dso *machine__get_kernel(struct machine *machine) |
cd84c2ac | 1721 | { |
a1645ce1 ZY |
1722 | const char *vmlinux_name = NULL; |
1723 | struct dso *kernel; | |
cd84c2ac | 1724 | |
aeafcbaf | 1725 | if (machine__is_host(machine)) { |
a1645ce1 | 1726 | vmlinux_name = symbol_conf.vmlinux_name; |
f57b05ed JO |
1727 | if (!vmlinux_name) |
1728 | vmlinux_name = "[kernel.kallsyms]"; | |
1729 | ||
1730 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
1731 | "[kernel]", | |
1732 | DSO_TYPE_KERNEL); | |
a1645ce1 | 1733 | } else { |
f57b05ed JO |
1734 | char bf[PATH_MAX]; |
1735 | ||
aeafcbaf | 1736 | if (machine__is_default_guest(machine)) |
a1645ce1 | 1737 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
f57b05ed JO |
1738 | if (!vmlinux_name) |
1739 | vmlinux_name = machine__mmap_name(machine, bf, | |
1740 | sizeof(bf)); | |
1741 | ||
1742 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
1743 | "[guest.kernel]", | |
1744 | DSO_TYPE_GUEST_KERNEL); | |
8d92c02a | 1745 | } |
cd84c2ac | 1746 | |
f57b05ed | 1747 | if (kernel != NULL && (!kernel->has_build_id)) |
aeafcbaf | 1748 | dso__read_running_kernel_build_id(kernel, machine); |
f57b05ed | 1749 | |
f1dfa0b1 | 1750 | return kernel; |
f1dfa0b1 ACM |
1751 | } |
1752 | ||
d214afbd ML |
1753 | struct process_args { |
1754 | u64 start; | |
1755 | }; | |
1756 | ||
1757 | static int symbol__in_kernel(void *arg, const char *name, | |
1d037ca1 | 1758 | char type __maybe_unused, u64 start) |
d214afbd ML |
1759 | { |
1760 | struct process_args *args = arg; | |
1761 | ||
1762 | if (strchr(name, '[')) | |
1763 | return 0; | |
1764 | ||
1765 | args->start = start; | |
1766 | return 1; | |
1767 | } | |
1768 | ||
1769 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
1770 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
1771 | { | |
1772 | const char *filename; | |
1773 | char path[PATH_MAX]; | |
1774 | struct process_args args; | |
1775 | ||
1776 | if (machine__is_host(machine)) { | |
1777 | filename = "/proc/kallsyms"; | |
1778 | } else { | |
1779 | if (machine__is_default_guest(machine)) | |
1780 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
1781 | else { | |
1782 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
1783 | filename = path; | |
1784 | } | |
1785 | } | |
1786 | ||
ec80fde7 ACM |
1787 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
1788 | return 0; | |
1789 | ||
d214afbd ML |
1790 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
1791 | return 0; | |
1792 | ||
1793 | return args.start; | |
1794 | } | |
1795 | ||
aeafcbaf | 1796 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
f1dfa0b1 | 1797 | { |
de176489 | 1798 | enum map_type type; |
aeafcbaf | 1799 | u64 start = machine__get_kernel_start_addr(machine); |
f1dfa0b1 | 1800 | |
de176489 | 1801 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
1802 | struct kmap *kmap; |
1803 | ||
aeafcbaf ACM |
1804 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
1805 | if (machine->vmlinux_maps[type] == NULL) | |
de176489 | 1806 | return -1; |
f1dfa0b1 | 1807 | |
aeafcbaf ACM |
1808 | machine->vmlinux_maps[type]->map_ip = |
1809 | machine->vmlinux_maps[type]->unmap_ip = | |
1810 | identity__map_ip; | |
1811 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
1812 | kmap->kmaps = &machine->kmaps; | |
1813 | map_groups__insert(&machine->kmaps, | |
1814 | machine->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
1815 | } |
1816 | ||
f1dfa0b1 | 1817 | return 0; |
2446042c ACM |
1818 | } |
1819 | ||
aeafcbaf | 1820 | void machine__destroy_kernel_maps(struct machine *machine) |
076c6e45 ACM |
1821 | { |
1822 | enum map_type type; | |
1823 | ||
1824 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
1825 | struct kmap *kmap; | |
1826 | ||
aeafcbaf | 1827 | if (machine->vmlinux_maps[type] == NULL) |
076c6e45 ACM |
1828 | continue; |
1829 | ||
aeafcbaf ACM |
1830 | kmap = map__kmap(machine->vmlinux_maps[type]); |
1831 | map_groups__remove(&machine->kmaps, | |
1832 | machine->vmlinux_maps[type]); | |
076c6e45 ACM |
1833 | if (kmap->ref_reloc_sym) { |
1834 | /* | |
1835 | * ref_reloc_sym is shared among all maps, so free just | |
1836 | * on one of them. | |
1837 | */ | |
1838 | if (type == MAP__FUNCTION) { | |
1839 | free((char *)kmap->ref_reloc_sym->name); | |
1840 | kmap->ref_reloc_sym->name = NULL; | |
1841 | free(kmap->ref_reloc_sym); | |
1842 | } | |
1843 | kmap->ref_reloc_sym = NULL; | |
1844 | } | |
1845 | ||
aeafcbaf ACM |
1846 | map__delete(machine->vmlinux_maps[type]); |
1847 | machine->vmlinux_maps[type] = NULL; | |
076c6e45 ACM |
1848 | } |
1849 | } | |
1850 | ||
aeafcbaf | 1851 | int machine__create_kernel_maps(struct machine *machine) |
5c0541d5 | 1852 | { |
f57b05ed | 1853 | struct dso *kernel = machine__get_kernel(machine); |
5c0541d5 ACM |
1854 | |
1855 | if (kernel == NULL || | |
aeafcbaf | 1856 | __machine__create_kernel_maps(machine, kernel) < 0) |
5c0541d5 ACM |
1857 | return -1; |
1858 | ||
f51304d3 DA |
1859 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { |
1860 | if (machine__is_host(machine)) | |
1861 | pr_debug("Problems creating module maps, " | |
1862 | "continuing anyway...\n"); | |
1863 | else | |
1864 | pr_debug("Problems creating module maps for guest %d, " | |
1865 | "continuing anyway...\n", machine->pid); | |
1866 | } | |
1867 | ||
5c0541d5 ACM |
1868 | /* |
1869 | * Now that we have all the maps created, just set the ->end of them: | |
1870 | */ | |
aeafcbaf | 1871 | map_groups__fixup_end(&machine->kmaps); |
5c0541d5 ACM |
1872 | return 0; |
1873 | } | |
1874 | ||
cc612d81 ACM |
1875 | static void vmlinux_path__exit(void) |
1876 | { | |
1877 | while (--vmlinux_path__nr_entries >= 0) { | |
1878 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1879 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1880 | } | |
1881 | ||
1882 | free(vmlinux_path); | |
1883 | vmlinux_path = NULL; | |
1884 | } | |
1885 | ||
1886 | static int vmlinux_path__init(void) | |
1887 | { | |
1888 | struct utsname uts; | |
1889 | char bf[PATH_MAX]; | |
1890 | ||
cc612d81 ACM |
1891 | vmlinux_path = malloc(sizeof(char *) * 5); |
1892 | if (vmlinux_path == NULL) | |
1893 | return -1; | |
1894 | ||
1895 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1896 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1897 | goto out_fail; | |
1898 | ++vmlinux_path__nr_entries; | |
1899 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1900 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1901 | goto out_fail; | |
1902 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
1903 | |
1904 | /* only try running kernel version if no symfs was given */ | |
1905 | if (symbol_conf.symfs[0] != 0) | |
1906 | return 0; | |
1907 | ||
1908 | if (uname(&uts) < 0) | |
1909 | return -1; | |
1910 | ||
cc612d81 ACM |
1911 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
1912 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1913 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1914 | goto out_fail; | |
1915 | ++vmlinux_path__nr_entries; | |
1916 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1917 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1918 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1919 | goto out_fail; | |
1920 | ++vmlinux_path__nr_entries; | |
1921 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1922 | uts.release); | |
1923 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1924 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1925 | goto out_fail; | |
1926 | ++vmlinux_path__nr_entries; | |
1927 | ||
1928 | return 0; | |
1929 | ||
1930 | out_fail: | |
1931 | vmlinux_path__exit(); | |
1932 | return -1; | |
1933 | } | |
1934 | ||
aeafcbaf | 1935 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
b0a9ab62 ACM |
1936 | { |
1937 | int i; | |
1938 | size_t printed = 0; | |
aeafcbaf | 1939 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
5ad90e4e ACM |
1940 | |
1941 | if (kdso->has_build_id) { | |
1942 | char filename[PATH_MAX]; | |
1943 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
1944 | printed += fprintf(fp, "[0] %s\n", filename); | |
1945 | } | |
b0a9ab62 ACM |
1946 | |
1947 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
1948 | printed += fprintf(fp, "[%d] %s\n", |
1949 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
1950 | |
1951 | return printed; | |
1952 | } | |
1953 | ||
655000e7 ACM |
1954 | static int setup_list(struct strlist **list, const char *list_str, |
1955 | const char *list_name) | |
1956 | { | |
1957 | if (list_str == NULL) | |
1958 | return 0; | |
1959 | ||
1960 | *list = strlist__new(true, list_str); | |
1961 | if (!*list) { | |
1962 | pr_err("problems parsing %s list\n", list_name); | |
1963 | return -1; | |
1964 | } | |
1965 | return 0; | |
1966 | } | |
1967 | ||
ec80fde7 ACM |
1968 | static bool symbol__read_kptr_restrict(void) |
1969 | { | |
1970 | bool value = false; | |
1971 | ||
1972 | if (geteuid() != 0) { | |
1973 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
1974 | if (fp != NULL) { | |
1975 | char line[8]; | |
1976 | ||
1977 | if (fgets(line, sizeof(line), fp) != NULL) | |
1978 | value = atoi(line) != 0; | |
1979 | ||
1980 | fclose(fp); | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | return value; | |
1985 | } | |
1986 | ||
75be6cf4 | 1987 | int symbol__init(void) |
2446042c | 1988 | { |
ec5761ea DA |
1989 | const char *symfs; |
1990 | ||
85e00b55 JZ |
1991 | if (symbol_conf.initialized) |
1992 | return 0; | |
1993 | ||
9ac3e487 | 1994 | symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); |
4d439517 | 1995 | |
166ccc9c NK |
1996 | symbol__elf_init(); |
1997 | ||
75be6cf4 ACM |
1998 | if (symbol_conf.sort_by_name) |
1999 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2000 | sizeof(struct symbol)); | |
b32d133a | 2001 | |
75be6cf4 | 2002 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2003 | return -1; |
2004 | ||
c410a338 ACM |
2005 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2006 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2007 | return -1; | |
2008 | } | |
2009 | ||
655000e7 ACM |
2010 | if (setup_list(&symbol_conf.dso_list, |
2011 | symbol_conf.dso_list_str, "dso") < 0) | |
2012 | return -1; | |
2013 | ||
2014 | if (setup_list(&symbol_conf.comm_list, | |
2015 | symbol_conf.comm_list_str, "comm") < 0) | |
2016 | goto out_free_dso_list; | |
2017 | ||
2018 | if (setup_list(&symbol_conf.sym_list, | |
2019 | symbol_conf.sym_list_str, "symbol") < 0) | |
2020 | goto out_free_comm_list; | |
2021 | ||
ec5761ea DA |
2022 | /* |
2023 | * A path to symbols of "/" is identical to "" | |
2024 | * reset here for simplicity. | |
2025 | */ | |
2026 | symfs = realpath(symbol_conf.symfs, NULL); | |
2027 | if (symfs == NULL) | |
2028 | symfs = symbol_conf.symfs; | |
2029 | if (strcmp(symfs, "/") == 0) | |
2030 | symbol_conf.symfs = ""; | |
2031 | if (symfs != symbol_conf.symfs) | |
2032 | free((void *)symfs); | |
2033 | ||
ec80fde7 ACM |
2034 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2035 | ||
85e00b55 | 2036 | symbol_conf.initialized = true; |
4aa65636 | 2037 | return 0; |
655000e7 | 2038 | |
655000e7 ACM |
2039 | out_free_comm_list: |
2040 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2041 | out_free_dso_list: |
2042 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2043 | return -1; |
4aa65636 ACM |
2044 | } |
2045 | ||
d65a458b ACM |
2046 | void symbol__exit(void) |
2047 | { | |
85e00b55 JZ |
2048 | if (!symbol_conf.initialized) |
2049 | return; | |
d65a458b ACM |
2050 | strlist__delete(symbol_conf.sym_list); |
2051 | strlist__delete(symbol_conf.dso_list); | |
2052 | strlist__delete(symbol_conf.comm_list); | |
2053 | vmlinux_path__exit(); | |
2054 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2055 | symbol_conf.initialized = false; |
d65a458b ACM |
2056 | } |
2057 | ||
aeafcbaf | 2058 | int machines__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2059 | { |
aeafcbaf | 2060 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2061 | |
23346f21 | 2062 | if (machine == NULL) |
a1645ce1 | 2063 | return -1; |
cc612d81 | 2064 | |
5c0541d5 | 2065 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2066 | } |
5aab621b ACM |
2067 | |
2068 | static int hex(char ch) | |
2069 | { | |
2070 | if ((ch >= '0') && (ch <= '9')) | |
2071 | return ch - '0'; | |
2072 | if ((ch >= 'a') && (ch <= 'f')) | |
2073 | return ch - 'a' + 10; | |
2074 | if ((ch >= 'A') && (ch <= 'F')) | |
2075 | return ch - 'A' + 10; | |
2076 | return -1; | |
2077 | } | |
2078 | ||
2079 | /* | |
2080 | * While we find nice hex chars, build a long_val. | |
2081 | * Return number of chars processed. | |
2082 | */ | |
2083 | int hex2u64(const char *ptr, u64 *long_val) | |
2084 | { | |
2085 | const char *p = ptr; | |
2086 | *long_val = 0; | |
2087 | ||
2088 | while (*p) { | |
2089 | const int hex_val = hex(*p); | |
2090 | ||
2091 | if (hex_val < 0) | |
2092 | break; | |
2093 | ||
2094 | *long_val = (*long_val << 4) | hex_val; | |
2095 | p++; | |
2096 | } | |
2097 | ||
2098 | return p - ptr; | |
2099 | } | |
2100 | ||
2101 | char *strxfrchar(char *s, char from, char to) | |
2102 | { | |
2103 | char *p = s; | |
2104 | ||
2105 | while ((p = strchr(p, from)) != NULL) | |
2106 | *p++ = to; | |
2107 | ||
2108 | return s; | |
2109 | } | |
a1645ce1 | 2110 | |
aeafcbaf | 2111 | int machines__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2112 | { |
2113 | int ret = 0; | |
2114 | struct dirent **namelist = NULL; | |
2115 | int i, items = 0; | |
2116 | char path[PATH_MAX]; | |
2117 | pid_t pid; | |
347ed990 | 2118 | char *endp; |
a1645ce1 ZY |
2119 | |
2120 | if (symbol_conf.default_guest_vmlinux_name || | |
2121 | symbol_conf.default_guest_modules || | |
2122 | symbol_conf.default_guest_kallsyms) { | |
aeafcbaf | 2123 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2124 | } |
2125 | ||
2126 | if (symbol_conf.guestmount) { | |
2127 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2128 | if (items <= 0) | |
2129 | return -ENOENT; | |
2130 | for (i = 0; i < items; i++) { | |
2131 | if (!isdigit(namelist[i]->d_name[0])) { | |
2132 | /* Filter out . and .. */ | |
2133 | continue; | |
2134 | } | |
347ed990 DA |
2135 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); |
2136 | if ((*endp != '\0') || | |
2137 | (endp == namelist[i]->d_name) || | |
2138 | (errno == ERANGE)) { | |
2139 | pr_debug("invalid directory (%s). Skipping.\n", | |
2140 | namelist[i]->d_name); | |
2141 | continue; | |
2142 | } | |
a1645ce1 ZY |
2143 | sprintf(path, "%s/%s/proc/kallsyms", |
2144 | symbol_conf.guestmount, | |
2145 | namelist[i]->d_name); | |
2146 | ret = access(path, R_OK); | |
2147 | if (ret) { | |
2148 | pr_debug("Can't access file %s\n", path); | |
2149 | goto failure; | |
2150 | } | |
aeafcbaf | 2151 | machines__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2152 | } |
2153 | failure: | |
2154 | free(namelist); | |
2155 | } | |
2156 | ||
2157 | return ret; | |
2158 | } | |
5c0541d5 | 2159 | |
aeafcbaf | 2160 | void machines__destroy_guest_kernel_maps(struct rb_root *machines) |
076c6e45 | 2161 | { |
aeafcbaf | 2162 | struct rb_node *next = rb_first(machines); |
076c6e45 ACM |
2163 | |
2164 | while (next) { | |
2165 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2166 | ||
2167 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 2168 | rb_erase(&pos->rb_node, machines); |
076c6e45 ACM |
2169 | machine__delete(pos); |
2170 | } | |
2171 | } | |
2172 | ||
aeafcbaf | 2173 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
5c0541d5 ACM |
2174 | enum map_type type, symbol_filter_t filter) |
2175 | { | |
aeafcbaf | 2176 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2177 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
2178 | ||
2179 | if (ret > 0) { | |
2180 | dso__set_loaded(map->dso, type); | |
2181 | /* | |
2182 | * Since /proc/kallsyms will have multiple sessions for the | |
2183 | * kernel, with modules between them, fixup the end of all | |
2184 | * sections. | |
2185 | */ | |
aeafcbaf | 2186 | __map_groups__fixup_end(&machine->kmaps, type); |
5c0541d5 ACM |
2187 | } |
2188 | ||
2189 | return ret; | |
2190 | } | |
2191 | ||
aeafcbaf | 2192 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
5c0541d5 ACM |
2193 | symbol_filter_t filter) |
2194 | { | |
aeafcbaf | 2195 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2196 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
2197 | ||
2198 | if (ret > 0) { | |
2199 | dso__set_loaded(map->dso, type); | |
2200 | map__reloc_vmlinux(map); | |
2201 | } | |
2202 | ||
2203 | return ret; | |
2204 | } | |
225466f1 SD |
2205 | |
2206 | struct map *dso__new_map(const char *name) | |
2207 | { | |
378474e4 | 2208 | struct map *map = NULL; |
225466f1 | 2209 | struct dso *dso = dso__new(name); |
378474e4 SD |
2210 | |
2211 | if (dso) | |
2212 | map = map__new2(0, dso, MAP__FUNCTION); | |
225466f1 SD |
2213 | |
2214 | return map; | |
2215 | } | |
949d160b JO |
2216 | |
2217 | static int open_dso(struct dso *dso, struct machine *machine) | |
2218 | { | |
2219 | char *root_dir = (char *) ""; | |
2220 | char *name; | |
2221 | int fd; | |
2222 | ||
2223 | name = malloc(PATH_MAX); | |
2224 | if (!name) | |
2225 | return -ENOMEM; | |
2226 | ||
2227 | if (machine) | |
2228 | root_dir = machine->root_dir; | |
2229 | ||
2230 | if (dso__binary_type_file(dso, dso->data_type, | |
2231 | root_dir, name, PATH_MAX)) { | |
2232 | free(name); | |
2233 | return -EINVAL; | |
2234 | } | |
2235 | ||
2236 | fd = open(name, O_RDONLY); | |
2237 | free(name); | |
2238 | return fd; | |
2239 | } | |
2240 | ||
2241 | int dso__data_fd(struct dso *dso, struct machine *machine) | |
2242 | { | |
2243 | int i = 0; | |
2244 | ||
2245 | if (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND) | |
2246 | return open_dso(dso, machine); | |
2247 | ||
2248 | do { | |
2249 | int fd; | |
2250 | ||
2251 | dso->data_type = binary_type_data[i++]; | |
2252 | ||
2253 | fd = open_dso(dso, machine); | |
2254 | if (fd >= 0) | |
2255 | return fd; | |
2256 | ||
2257 | } while (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND); | |
2258 | ||
2259 | return -EINVAL; | |
2260 | } | |
2261 | ||
4dff624a JO |
2262 | static void |
2263 | dso_cache__free(struct rb_root *root) | |
949d160b | 2264 | { |
4dff624a JO |
2265 | struct rb_node *next = rb_first(root); |
2266 | ||
2267 | while (next) { | |
2268 | struct dso_cache *cache; | |
2269 | ||
2270 | cache = rb_entry(next, struct dso_cache, rb_node); | |
2271 | next = rb_next(&cache->rb_node); | |
2272 | rb_erase(&cache->rb_node, root); | |
2273 | free(cache); | |
2274 | } | |
949d160b JO |
2275 | } |
2276 | ||
4dff624a JO |
2277 | static struct dso_cache* |
2278 | dso_cache__find(struct rb_root *root, u64 offset) | |
949d160b | 2279 | { |
4dff624a JO |
2280 | struct rb_node **p = &root->rb_node; |
2281 | struct rb_node *parent = NULL; | |
2282 | struct dso_cache *cache; | |
2283 | ||
2284 | while (*p != NULL) { | |
2285 | u64 end; | |
2286 | ||
2287 | parent = *p; | |
2288 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
2289 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
2290 | ||
2291 | if (offset < cache->offset) | |
2292 | p = &(*p)->rb_left; | |
2293 | else if (offset >= end) | |
2294 | p = &(*p)->rb_right; | |
2295 | else | |
2296 | return cache; | |
2297 | } | |
2298 | return NULL; | |
2299 | } | |
2300 | ||
2301 | static void | |
2302 | dso_cache__insert(struct rb_root *root, struct dso_cache *new) | |
2303 | { | |
2304 | struct rb_node **p = &root->rb_node; | |
2305 | struct rb_node *parent = NULL; | |
2306 | struct dso_cache *cache; | |
2307 | u64 offset = new->offset; | |
2308 | ||
2309 | while (*p != NULL) { | |
2310 | u64 end; | |
2311 | ||
2312 | parent = *p; | |
2313 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
2314 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
2315 | ||
2316 | if (offset < cache->offset) | |
2317 | p = &(*p)->rb_left; | |
2318 | else if (offset >= end) | |
2319 | p = &(*p)->rb_right; | |
2320 | } | |
2321 | ||
2322 | rb_link_node(&new->rb_node, parent, p); | |
2323 | rb_insert_color(&new->rb_node, root); | |
2324 | } | |
2325 | ||
2326 | static ssize_t | |
2327 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
2328 | u8 *data, u64 size) | |
2329 | { | |
2330 | u64 cache_offset = offset - cache->offset; | |
2331 | u64 cache_size = min(cache->size - cache_offset, size); | |
2332 | ||
2333 | memcpy(data, cache->data + cache_offset, cache_size); | |
2334 | return cache_size; | |
949d160b JO |
2335 | } |
2336 | ||
4dff624a JO |
2337 | static ssize_t |
2338 | dso_cache__read(struct dso *dso, struct machine *machine, | |
2339 | u64 offset, u8 *data, ssize_t size) | |
949d160b | 2340 | { |
4dff624a JO |
2341 | struct dso_cache *cache; |
2342 | ssize_t ret; | |
949d160b JO |
2343 | int fd; |
2344 | ||
2345 | fd = dso__data_fd(dso, machine); | |
2346 | if (fd < 0) | |
2347 | return -1; | |
2348 | ||
2349 | do { | |
4dff624a JO |
2350 | u64 cache_offset; |
2351 | ||
2352 | ret = -ENOMEM; | |
2353 | ||
2354 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); | |
2355 | if (!cache) | |
949d160b JO |
2356 | break; |
2357 | ||
4dff624a JO |
2358 | cache_offset = offset & DSO__DATA_CACHE_MASK; |
2359 | ret = -EINVAL; | |
2360 | ||
2361 | if (-1 == lseek(fd, cache_offset, SEEK_SET)) | |
949d160b JO |
2362 | break; |
2363 | ||
4dff624a JO |
2364 | ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE); |
2365 | if (ret <= 0) | |
2366 | break; | |
2367 | ||
2368 | cache->offset = cache_offset; | |
2369 | cache->size = ret; | |
2370 | dso_cache__insert(&dso->cache, cache); | |
2371 | ||
2372 | ret = dso_cache__memcpy(cache, offset, data, size); | |
949d160b JO |
2373 | |
2374 | } while (0); | |
2375 | ||
4dff624a JO |
2376 | if (ret <= 0) |
2377 | free(cache); | |
2378 | ||
949d160b | 2379 | close(fd); |
4dff624a JO |
2380 | return ret; |
2381 | } | |
2382 | ||
2383 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, | |
2384 | u64 offset, u8 *data, ssize_t size) | |
2385 | { | |
2386 | struct dso_cache *cache; | |
2387 | ||
2388 | cache = dso_cache__find(&dso->cache, offset); | |
2389 | if (cache) | |
2390 | return dso_cache__memcpy(cache, offset, data, size); | |
2391 | else | |
2392 | return dso_cache__read(dso, machine, offset, data, size); | |
949d160b JO |
2393 | } |
2394 | ||
2395 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, | |
2396 | u64 offset, u8 *data, ssize_t size) | |
2397 | { | |
4dff624a JO |
2398 | ssize_t r = 0; |
2399 | u8 *p = data; | |
2400 | ||
2401 | do { | |
2402 | ssize_t ret; | |
2403 | ||
2404 | ret = dso_cache_read(dso, machine, offset, p, size); | |
2405 | if (ret < 0) | |
2406 | return ret; | |
2407 | ||
2408 | /* Reached EOF, return what we have. */ | |
2409 | if (!ret) | |
2410 | break; | |
2411 | ||
2412 | BUG_ON(ret > size); | |
2413 | ||
2414 | r += ret; | |
2415 | p += ret; | |
2416 | offset += ret; | |
2417 | size -= ret; | |
2418 | ||
2419 | } while (size); | |
2420 | ||
2421 | return r; | |
949d160b JO |
2422 | } |
2423 | ||
2424 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, | |
2425 | struct machine *machine, u64 addr, | |
2426 | u8 *data, ssize_t size) | |
2427 | { | |
2428 | u64 offset = map->map_ip(map, addr); | |
2429 | return dso__data_read_offset(dso, machine, offset, data, size); | |
2430 | } |