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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 ACM |
17 | |
18 | #include <libelf.h> | |
19 | #include <gelf.h> | |
20 | #include <elf.h> | |
f1617b40 | 21 | #include <limits.h> |
439d473b | 22 | #include <sys/utsname.h> |
2cdbc46d | 23 | |
3b01a413 | 24 | #ifndef KSYM_NAME_LEN |
c752d040 | 25 | #define KSYM_NAME_LEN 256 |
3b01a413 ACM |
26 | #endif |
27 | ||
c12e15e7 ACM |
28 | #ifndef NT_GNU_BUILD_ID |
29 | #define NT_GNU_BUILD_ID 3 | |
30 | #endif | |
31 | ||
4dff624a | 32 | static void dso_cache__free(struct rb_root *root); |
aeafcbaf | 33 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id); |
21916c38 | 34 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); |
b0da954a | 35 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 36 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
aeafcbaf | 37 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 38 | symbol_filter_t filter); |
aeafcbaf | 39 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 40 | symbol_filter_t filter); |
cc612d81 ACM |
41 | static int vmlinux_path__nr_entries; |
42 | static char **vmlinux_path; | |
439d473b | 43 | |
75be6cf4 | 44 | struct symbol_conf symbol_conf = { |
d599db3f | 45 | .exclude_other = true, |
b32d133a ACM |
46 | .use_modules = true, |
47 | .try_vmlinux_path = true, | |
3e6a2a7f | 48 | .annotate_src = true, |
ec5761ea | 49 | .symfs = "", |
b32d133a ACM |
50 | }; |
51 | ||
44f24cb3 JO |
52 | static enum dso_binary_type binary_type_symtab[] = { |
53 | DSO_BINARY_TYPE__KALLSYMS, | |
54 | DSO_BINARY_TYPE__GUEST_KALLSYMS, | |
55 | DSO_BINARY_TYPE__JAVA_JIT, | |
56 | DSO_BINARY_TYPE__DEBUGLINK, | |
57 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
58 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, | |
59 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, | |
60 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, | |
61 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
62 | DSO_BINARY_TYPE__GUEST_KMODULE, | |
63 | DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, | |
64 | DSO_BINARY_TYPE__NOT_FOUND, | |
65 | }; | |
66 | ||
028df767 | 67 | #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) |
44f24cb3 | 68 | |
949d160b JO |
69 | static enum dso_binary_type binary_type_data[] = { |
70 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
71 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
72 | DSO_BINARY_TYPE__NOT_FOUND, | |
73 | }; | |
74 | ||
028df767 | 75 | #define DSO_BINARY_TYPE__DATA_CNT ARRAY_SIZE(binary_type_data) |
949d160b | 76 | |
aeafcbaf | 77 | int dso__name_len(const struct dso *dso) |
8a6c5b26 | 78 | { |
1e2dd2f7 DM |
79 | if (!dso) |
80 | return strlen("[unknown]"); | |
8a6c5b26 | 81 | if (verbose) |
aeafcbaf | 82 | return dso->long_name_len; |
8a6c5b26 | 83 | |
aeafcbaf | 84 | return dso->short_name_len; |
8a6c5b26 ACM |
85 | } |
86 | ||
aeafcbaf | 87 | bool dso__loaded(const struct dso *dso, enum map_type type) |
3610583c | 88 | { |
aeafcbaf | 89 | return dso->loaded & (1 << type); |
3610583c ACM |
90 | } |
91 | ||
aeafcbaf | 92 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) |
79406cd7 | 93 | { |
aeafcbaf | 94 | return dso->sorted_by_name & (1 << type); |
79406cd7 ACM |
95 | } |
96 | ||
aeafcbaf | 97 | static void dso__set_sorted_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 98 | { |
aeafcbaf | 99 | dso->sorted_by_name |= (1 << type); |
79406cd7 ACM |
100 | } |
101 | ||
36a3e646 | 102 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 103 | { |
31877908 AB |
104 | symbol_type = toupper(symbol_type); |
105 | ||
6893d4ee ACM |
106 | switch (map_type) { |
107 | case MAP__FUNCTION: | |
108 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 109 | case MAP__VARIABLE: |
31877908 | 110 | return symbol_type == 'D'; |
6893d4ee ACM |
111 | default: |
112 | return false; | |
113 | } | |
114 | } | |
115 | ||
694bf407 AB |
116 | static int prefix_underscores_count(const char *str) |
117 | { | |
118 | const char *tail = str; | |
119 | ||
120 | while (*tail == '_') | |
121 | tail++; | |
122 | ||
123 | return tail - str; | |
124 | } | |
125 | ||
126 | #define SYMBOL_A 0 | |
127 | #define SYMBOL_B 1 | |
128 | ||
129 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
130 | { | |
131 | s64 a; | |
132 | s64 b; | |
133 | ||
134 | /* Prefer a symbol with non zero length */ | |
135 | a = syma->end - syma->start; | |
136 | b = symb->end - symb->start; | |
137 | if ((b == 0) && (a > 0)) | |
138 | return SYMBOL_A; | |
139 | else if ((a == 0) && (b > 0)) | |
140 | return SYMBOL_B; | |
141 | ||
142 | /* Prefer a non weak symbol over a weak one */ | |
143 | a = syma->binding == STB_WEAK; | |
144 | b = symb->binding == STB_WEAK; | |
145 | if (b && !a) | |
146 | return SYMBOL_A; | |
147 | if (a && !b) | |
148 | return SYMBOL_B; | |
149 | ||
150 | /* Prefer a global symbol over a non global one */ | |
151 | a = syma->binding == STB_GLOBAL; | |
152 | b = symb->binding == STB_GLOBAL; | |
153 | if (a && !b) | |
154 | return SYMBOL_A; | |
155 | if (b && !a) | |
156 | return SYMBOL_B; | |
157 | ||
158 | /* Prefer a symbol with less underscores */ | |
159 | a = prefix_underscores_count(syma->name); | |
160 | b = prefix_underscores_count(symb->name); | |
161 | if (b > a) | |
162 | return SYMBOL_A; | |
163 | else if (a > b) | |
164 | return SYMBOL_B; | |
165 | ||
166 | /* If all else fails, choose the symbol with the longest name */ | |
167 | if (strlen(syma->name) >= strlen(symb->name)) | |
168 | return SYMBOL_A; | |
169 | else | |
170 | return SYMBOL_B; | |
171 | } | |
172 | ||
173 | static void symbols__fixup_duplicate(struct rb_root *symbols) | |
174 | { | |
175 | struct rb_node *nd; | |
176 | struct symbol *curr, *next; | |
177 | ||
178 | nd = rb_first(symbols); | |
179 | ||
180 | while (nd) { | |
181 | curr = rb_entry(nd, struct symbol, rb_node); | |
182 | again: | |
183 | nd = rb_next(&curr->rb_node); | |
184 | next = rb_entry(nd, struct symbol, rb_node); | |
185 | ||
186 | if (!nd) | |
187 | break; | |
188 | ||
189 | if (curr->start != next->start) | |
190 | continue; | |
191 | ||
192 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
193 | rb_erase(&next->rb_node, symbols); | |
194 | goto again; | |
195 | } else { | |
196 | nd = rb_next(&curr->rb_node); | |
197 | rb_erase(&curr->rb_node, symbols); | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
aeafcbaf | 202 | static void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 203 | { |
aeafcbaf | 204 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 205 | struct symbol *curr, *prev; |
af427bf5 ACM |
206 | |
207 | if (prevnd == NULL) | |
208 | return; | |
209 | ||
2e538c4a ACM |
210 | curr = rb_entry(prevnd, struct symbol, rb_node); |
211 | ||
af427bf5 | 212 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
213 | prev = curr; |
214 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 215 | |
3b01a413 | 216 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 217 | prev->end = curr->start - 1; |
af427bf5 | 218 | } |
2e538c4a ACM |
219 | |
220 | /* Last entry */ | |
221 | if (curr->end == curr->start) | |
222 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
223 | } |
224 | ||
aeafcbaf | 225 | static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
226 | { |
227 | struct map *prev, *curr; | |
aeafcbaf | 228 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
229 | |
230 | if (prevnd == NULL) | |
231 | return; | |
232 | ||
233 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
234 | |
235 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
236 | prev = curr; | |
237 | curr = rb_entry(nd, struct map, rb_node); | |
238 | prev->end = curr->start - 1; | |
2e538c4a | 239 | } |
90c83218 ACM |
240 | |
241 | /* | |
242 | * We still haven't the actual symbols, so guess the | |
243 | * last map final address. | |
244 | */ | |
9d1faba5 | 245 | curr->end = ~0ULL; |
af427bf5 ACM |
246 | } |
247 | ||
aeafcbaf | 248 | static void map_groups__fixup_end(struct map_groups *mg) |
23ea4a3f ACM |
249 | { |
250 | int i; | |
251 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf | 252 | __map_groups__fixup_end(mg, i); |
23ea4a3f ACM |
253 | } |
254 | ||
c408fedf ACM |
255 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
256 | const char *name) | |
a2928c42 | 257 | { |
0085c954 | 258 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
259 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
260 | sizeof(*sym) + namelen)); | |
261 | if (sym == NULL) | |
0b73da3f IM |
262 | return NULL; |
263 | ||
75be6cf4 | 264 | if (symbol_conf.priv_size) |
aeafcbaf | 265 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 266 | |
aeafcbaf ACM |
267 | sym->start = start; |
268 | sym->end = len ? start + len - 1 : start; | |
269 | sym->binding = binding; | |
270 | sym->namelen = namelen - 1; | |
e4204992 | 271 | |
aeafcbaf ACM |
272 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
273 | __func__, name, start, sym->end); | |
274 | memcpy(sym->name, name, namelen); | |
a2928c42 | 275 | |
aeafcbaf | 276 | return sym; |
a2928c42 ACM |
277 | } |
278 | ||
aeafcbaf | 279 | void symbol__delete(struct symbol *sym) |
a2928c42 | 280 | { |
aeafcbaf | 281 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
282 | } |
283 | ||
aeafcbaf | 284 | static size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 285 | { |
9486aa38 | 286 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
287 | sym->start, sym->end, |
288 | sym->binding == STB_GLOBAL ? 'g' : | |
289 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
290 | sym->name); | |
a2928c42 ACM |
291 | } |
292 | ||
a978f2ab AN |
293 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
294 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 295 | { |
a978f2ab AN |
296 | unsigned long offset; |
297 | size_t length; | |
298 | ||
299 | if (sym && sym->name) { | |
300 | length = fprintf(fp, "%s", sym->name); | |
301 | if (al) { | |
302 | offset = al->addr - sym->start; | |
303 | length += fprintf(fp, "+0x%lx", offset); | |
304 | } | |
305 | return length; | |
306 | } else | |
307 | return fprintf(fp, "[unknown]"); | |
308 | } | |
547a92e0 | 309 | |
a978f2ab AN |
310 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
311 | { | |
312 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
313 | } |
314 | ||
aeafcbaf | 315 | void dso__set_long_name(struct dso *dso, char *name) |
cfc10d3b | 316 | { |
ef6ae724 ACM |
317 | if (name == NULL) |
318 | return; | |
aeafcbaf ACM |
319 | dso->long_name = name; |
320 | dso->long_name_len = strlen(name); | |
cfc10d3b ACM |
321 | } |
322 | ||
aeafcbaf | 323 | static void dso__set_short_name(struct dso *dso, const char *name) |
b63be8d7 ACM |
324 | { |
325 | if (name == NULL) | |
326 | return; | |
aeafcbaf ACM |
327 | dso->short_name = name; |
328 | dso->short_name_len = strlen(name); | |
b63be8d7 ACM |
329 | } |
330 | ||
aeafcbaf | 331 | static void dso__set_basename(struct dso *dso) |
cfc10d3b | 332 | { |
aeafcbaf | 333 | dso__set_short_name(dso, basename(dso->long_name)); |
cfc10d3b ACM |
334 | } |
335 | ||
00a192b3 | 336 | struct dso *dso__new(const char *name) |
a2928c42 | 337 | { |
aeafcbaf | 338 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
a2928c42 | 339 | |
aeafcbaf | 340 | if (dso != NULL) { |
6a4694a4 | 341 | int i; |
aeafcbaf ACM |
342 | strcpy(dso->name, name); |
343 | dso__set_long_name(dso, dso->name); | |
344 | dso__set_short_name(dso, dso->name); | |
6a4694a4 | 345 | for (i = 0; i < MAP__NR_TYPES; ++i) |
aeafcbaf | 346 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; |
4dff624a | 347 | dso->cache = RB_ROOT; |
44f24cb3 | 348 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
949d160b | 349 | dso->data_type = DSO_BINARY_TYPE__NOT_FOUND; |
aeafcbaf ACM |
350 | dso->loaded = 0; |
351 | dso->sorted_by_name = 0; | |
352 | dso->has_build_id = 0; | |
353 | dso->kernel = DSO_TYPE_USER; | |
8db4841f | 354 | dso->needs_swap = DSO_SWAP__UNSET; |
aeafcbaf | 355 | INIT_LIST_HEAD(&dso->node); |
a2928c42 ACM |
356 | } |
357 | ||
aeafcbaf | 358 | return dso; |
a2928c42 ACM |
359 | } |
360 | ||
aeafcbaf | 361 | static void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
362 | { |
363 | struct symbol *pos; | |
aeafcbaf | 364 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
365 | |
366 | while (next) { | |
367 | pos = rb_entry(next, struct symbol, rb_node); | |
368 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 369 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 370 | symbol__delete(pos); |
a2928c42 ACM |
371 | } |
372 | } | |
373 | ||
aeafcbaf | 374 | void dso__delete(struct dso *dso) |
a2928c42 | 375 | { |
6a4694a4 ACM |
376 | int i; |
377 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf ACM |
378 | symbols__delete(&dso->symbols[i]); |
379 | if (dso->sname_alloc) | |
380 | free((char *)dso->short_name); | |
381 | if (dso->lname_alloc) | |
382 | free(dso->long_name); | |
4dff624a | 383 | dso_cache__free(&dso->cache); |
aeafcbaf | 384 | free(dso); |
a2928c42 ACM |
385 | } |
386 | ||
aeafcbaf | 387 | void dso__set_build_id(struct dso *dso, void *build_id) |
8d06367f | 388 | { |
aeafcbaf ACM |
389 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); |
390 | dso->has_build_id = 1; | |
8d06367f ACM |
391 | } |
392 | ||
aeafcbaf | 393 | static void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 394 | { |
aeafcbaf | 395 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 396 | struct rb_node *parent = NULL; |
9cffa8d5 | 397 | const u64 ip = sym->start; |
a2928c42 ACM |
398 | struct symbol *s; |
399 | ||
400 | while (*p != NULL) { | |
401 | parent = *p; | |
402 | s = rb_entry(parent, struct symbol, rb_node); | |
403 | if (ip < s->start) | |
404 | p = &(*p)->rb_left; | |
405 | else | |
406 | p = &(*p)->rb_right; | |
407 | } | |
408 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 409 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
410 | } |
411 | ||
aeafcbaf | 412 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
413 | { |
414 | struct rb_node *n; | |
415 | ||
aeafcbaf | 416 | if (symbols == NULL) |
a2928c42 ACM |
417 | return NULL; |
418 | ||
aeafcbaf | 419 | n = symbols->rb_node; |
a2928c42 ACM |
420 | |
421 | while (n) { | |
422 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
423 | ||
424 | if (ip < s->start) | |
425 | n = n->rb_left; | |
426 | else if (ip > s->end) | |
427 | n = n->rb_right; | |
428 | else | |
429 | return s; | |
430 | } | |
431 | ||
432 | return NULL; | |
433 | } | |
434 | ||
79406cd7 ACM |
435 | struct symbol_name_rb_node { |
436 | struct rb_node rb_node; | |
437 | struct symbol sym; | |
438 | }; | |
439 | ||
aeafcbaf | 440 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 441 | { |
aeafcbaf | 442 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 443 | struct rb_node *parent = NULL; |
02a9d037 RV |
444 | struct symbol_name_rb_node *symn, *s; |
445 | ||
446 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
447 | |
448 | while (*p != NULL) { | |
449 | parent = *p; | |
450 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
451 | if (strcmp(sym->name, s->sym.name) < 0) | |
452 | p = &(*p)->rb_left; | |
453 | else | |
454 | p = &(*p)->rb_right; | |
455 | } | |
456 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 457 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
458 | } |
459 | ||
aeafcbaf ACM |
460 | static void symbols__sort_by_name(struct rb_root *symbols, |
461 | struct rb_root *source) | |
79406cd7 ACM |
462 | { |
463 | struct rb_node *nd; | |
464 | ||
465 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
466 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 467 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
468 | } |
469 | } | |
470 | ||
aeafcbaf ACM |
471 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
472 | const char *name) | |
79406cd7 ACM |
473 | { |
474 | struct rb_node *n; | |
475 | ||
aeafcbaf | 476 | if (symbols == NULL) |
79406cd7 ACM |
477 | return NULL; |
478 | ||
aeafcbaf | 479 | n = symbols->rb_node; |
79406cd7 ACM |
480 | |
481 | while (n) { | |
482 | struct symbol_name_rb_node *s; | |
483 | int cmp; | |
484 | ||
485 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
486 | cmp = strcmp(name, s->sym.name); | |
487 | ||
488 | if (cmp < 0) | |
489 | n = n->rb_left; | |
490 | else if (cmp > 0) | |
491 | n = n->rb_right; | |
492 | else | |
493 | return &s->sym; | |
494 | } | |
495 | ||
496 | return NULL; | |
497 | } | |
498 | ||
aeafcbaf | 499 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 500 | enum map_type type, u64 addr) |
fcf1203a | 501 | { |
aeafcbaf | 502 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
503 | } |
504 | ||
aeafcbaf | 505 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
506 | const char *name) |
507 | { | |
aeafcbaf | 508 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
509 | } |
510 | ||
aeafcbaf | 511 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 512 | { |
aeafcbaf ACM |
513 | dso__set_sorted_by_name(dso, type); |
514 | return symbols__sort_by_name(&dso->symbol_names[type], | |
515 | &dso->symbols[type]); | |
79406cd7 ACM |
516 | } |
517 | ||
aeafcbaf | 518 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
a2928c42 | 519 | { |
8d06367f | 520 | char *bid = bf; |
aeafcbaf | 521 | const u8 *raw = build_id; |
8d06367f | 522 | int i; |
a2928c42 | 523 | |
8d06367f ACM |
524 | for (i = 0; i < len; ++i) { |
525 | sprintf(bid, "%02x", *raw); | |
526 | ++raw; | |
527 | bid += 2; | |
528 | } | |
529 | ||
aeafcbaf | 530 | return raw - build_id; |
8d06367f ACM |
531 | } |
532 | ||
aeafcbaf | 533 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
8d06367f ACM |
534 | { |
535 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f | 536 | |
aeafcbaf | 537 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
9e03eb2d ACM |
538 | return fprintf(fp, "%s", sbuild_id); |
539 | } | |
540 | ||
aeafcbaf ACM |
541 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
542 | enum map_type type, FILE *fp) | |
90f18e63 SD |
543 | { |
544 | size_t ret = 0; | |
545 | struct rb_node *nd; | |
546 | struct symbol_name_rb_node *pos; | |
547 | ||
aeafcbaf | 548 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
549 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
550 | fprintf(fp, "%s\n", pos->sym.name); | |
551 | } | |
552 | ||
553 | return ret; | |
554 | } | |
555 | ||
aeafcbaf | 556 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) |
9e03eb2d ACM |
557 | { |
558 | struct rb_node *nd; | |
aeafcbaf | 559 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); |
9e03eb2d | 560 | |
aeafcbaf ACM |
561 | if (dso->short_name != dso->long_name) |
562 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3846df2e | 563 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], |
aeafcbaf ACM |
564 | dso->loaded ? "" : "NOT "); |
565 | ret += dso__fprintf_buildid(dso, fp); | |
6a4694a4 | 566 | ret += fprintf(fp, ")\n"); |
aeafcbaf | 567 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { |
95011c60 ACM |
568 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
569 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
570 | } |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
9e201442 ACM |
575 | int kallsyms__parse(const char *filename, void *arg, |
576 | int (*process_symbol)(void *arg, const char *name, | |
3b01a413 | 577 | char type, u64 start, u64 end)) |
a2928c42 | 578 | { |
a2928c42 ACM |
579 | char *line = NULL; |
580 | size_t n; | |
3b01a413 | 581 | int err = -1; |
9e201442 | 582 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
583 | |
584 | if (file == NULL) | |
585 | goto out_failure; | |
586 | ||
3b01a413 ACM |
587 | err = 0; |
588 | ||
a2928c42 | 589 | while (!feof(file)) { |
9cffa8d5 | 590 | u64 start; |
a2928c42 ACM |
591 | int line_len, len; |
592 | char symbol_type; | |
2e538c4a | 593 | char *symbol_name; |
a2928c42 ACM |
594 | |
595 | line_len = getline(&line, &n, file); | |
a1645ce1 | 596 | if (line_len < 0 || !line) |
a2928c42 ACM |
597 | break; |
598 | ||
a2928c42 ACM |
599 | line[--line_len] = '\0'; /* \n */ |
600 | ||
a0055ae2 | 601 | len = hex2u64(line, &start); |
a2928c42 ACM |
602 | |
603 | len++; | |
604 | if (len + 2 >= line_len) | |
605 | continue; | |
606 | ||
31877908 | 607 | symbol_type = line[len]; |
3b01a413 ACM |
608 | len += 2; |
609 | symbol_name = line + len; | |
610 | len = line_len - len; | |
682b335a | 611 | |
3b01a413 ACM |
612 | if (len >= KSYM_NAME_LEN) { |
613 | err = -1; | |
682b335a | 614 | break; |
3b01a413 ACM |
615 | } |
616 | ||
3f5a4272 AB |
617 | /* |
618 | * module symbols are not sorted so we add all | |
619 | * symbols with zero length and rely on | |
620 | * symbols__fixup_end() to fix it up. | |
621 | */ | |
622 | err = process_symbol(arg, symbol_name, | |
623 | symbol_type, start, start); | |
624 | if (err) | |
625 | break; | |
2e538c4a ACM |
626 | } |
627 | ||
628 | free(line); | |
629 | fclose(file); | |
682b335a | 630 | return err; |
2e538c4a | 631 | |
2e538c4a ACM |
632 | out_failure: |
633 | return -1; | |
634 | } | |
635 | ||
682b335a ACM |
636 | struct process_kallsyms_args { |
637 | struct map *map; | |
638 | struct dso *dso; | |
639 | }; | |
640 | ||
c408fedf ACM |
641 | static u8 kallsyms2elf_type(char type) |
642 | { | |
643 | if (type == 'W') | |
644 | return STB_WEAK; | |
645 | ||
646 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
647 | } | |
648 | ||
682b335a | 649 | static int map__process_kallsym_symbol(void *arg, const char *name, |
3b01a413 | 650 | char type, u64 start, u64 end) |
682b335a ACM |
651 | { |
652 | struct symbol *sym; | |
653 | struct process_kallsyms_args *a = arg; | |
654 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
655 | ||
656 | if (!symbol_type__is_a(type, a->map->type)) | |
657 | return 0; | |
658 | ||
3b01a413 ACM |
659 | sym = symbol__new(start, end - start + 1, |
660 | kallsyms2elf_type(type), name); | |
682b335a ACM |
661 | if (sym == NULL) |
662 | return -ENOMEM; | |
663 | /* | |
664 | * We will pass the symbols to the filter later, in | |
665 | * map__split_kallsyms, when we have split the maps per module | |
666 | */ | |
667 | symbols__insert(root, sym); | |
a1645ce1 | 668 | |
682b335a ACM |
669 | return 0; |
670 | } | |
671 | ||
672 | /* | |
673 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
674 | * so that we can in the next step set the symbol ->end address and then | |
675 | * call kernel_maps__split_kallsyms. | |
676 | */ | |
aeafcbaf | 677 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 678 | struct map *map) |
682b335a | 679 | { |
aeafcbaf | 680 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 681 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
682 | } |
683 | ||
2e538c4a ACM |
684 | /* |
685 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
686 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
687 | * the original ELF section names vmlinux have. | |
688 | */ | |
aeafcbaf | 689 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 690 | symbol_filter_t filter) |
2e538c4a | 691 | { |
9de89fe7 | 692 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 693 | struct machine *machine = kmaps->machine; |
4e06255f | 694 | struct map *curr_map = map; |
2e538c4a | 695 | struct symbol *pos; |
8a953312 | 696 | int count = 0, moved = 0; |
aeafcbaf | 697 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 698 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
699 | int kernel_range = 0; |
700 | ||
701 | while (next) { | |
702 | char *module; | |
703 | ||
704 | pos = rb_entry(next, struct symbol, rb_node); | |
705 | next = rb_next(&pos->rb_node); | |
706 | ||
707 | module = strchr(pos->name, '\t'); | |
708 | if (module) { | |
75be6cf4 | 709 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
710 | goto discard_symbol; |
711 | ||
2e538c4a ACM |
712 | *module++ = '\0'; |
713 | ||
b7cece76 | 714 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 715 | if (curr_map != map && |
aeafcbaf | 716 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 717 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
718 | /* |
719 | * We assume all symbols of a module are | |
720 | * continuous in * kallsyms, so curr_map | |
721 | * points to a module and all its | |
722 | * symbols are in its kmap. Mark it as | |
723 | * loaded. | |
724 | */ | |
725 | dso__set_loaded(curr_map->dso, | |
726 | curr_map->type); | |
727 | } | |
728 | ||
729 | curr_map = map_groups__find_by_name(kmaps, | |
730 | map->type, module); | |
4e06255f | 731 | if (curr_map == NULL) { |
2f51903b | 732 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 733 | "inconsistency while looking " |
a1645ce1 | 734 | "for \"%s\" module!\n", |
23346f21 | 735 | machine->root_dir, module); |
a1645ce1 ZY |
736 | curr_map = map; |
737 | goto discard_symbol; | |
af427bf5 | 738 | } |
b7cece76 | 739 | |
a1645ce1 | 740 | if (curr_map->dso->loaded && |
23346f21 | 741 | !machine__is_default_guest(machine)) |
b7cece76 | 742 | goto discard_symbol; |
af427bf5 | 743 | } |
2e538c4a ACM |
744 | /* |
745 | * So that we look just like we get from .ko files, | |
746 | * i.e. not prelinked, relative to map->start. | |
747 | */ | |
4e06255f ACM |
748 | pos->start = curr_map->map_ip(curr_map, pos->start); |
749 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
750 | } else if (curr_map != map) { | |
2e538c4a | 751 | char dso_name[PATH_MAX]; |
aeafcbaf | 752 | struct dso *ndso; |
2e538c4a | 753 | |
8a953312 ACM |
754 | if (count == 0) { |
755 | curr_map = map; | |
756 | goto filter_symbol; | |
757 | } | |
758 | ||
aeafcbaf | 759 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
760 | snprintf(dso_name, sizeof(dso_name), |
761 | "[guest.kernel].%d", | |
762 | kernel_range++); | |
763 | else | |
764 | snprintf(dso_name, sizeof(dso_name), | |
765 | "[kernel].%d", | |
766 | kernel_range++); | |
2e538c4a | 767 | |
aeafcbaf ACM |
768 | ndso = dso__new(dso_name); |
769 | if (ndso == NULL) | |
2e538c4a ACM |
770 | return -1; |
771 | ||
aeafcbaf | 772 | ndso->kernel = dso->kernel; |
a1645ce1 | 773 | |
aeafcbaf | 774 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 775 | if (curr_map == NULL) { |
aeafcbaf | 776 | dso__delete(ndso); |
2e538c4a ACM |
777 | return -1; |
778 | } | |
a2928c42 | 779 | |
4e06255f | 780 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 781 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
782 | ++kernel_range; |
783 | } | |
8a953312 | 784 | filter_symbol: |
4e06255f | 785 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 786 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 787 | symbol__delete(pos); |
2e538c4a | 788 | } else { |
4e06255f ACM |
789 | if (curr_map != map) { |
790 | rb_erase(&pos->rb_node, root); | |
791 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
792 | ++moved; |
793 | } else | |
794 | ++count; | |
9974f496 | 795 | } |
a2928c42 ACM |
796 | } |
797 | ||
a1645ce1 | 798 | if (curr_map != map && |
aeafcbaf | 799 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 800 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
801 | dso__set_loaded(curr_map->dso, curr_map->type); |
802 | } | |
803 | ||
8a953312 | 804 | return count + moved; |
2e538c4a | 805 | } |
a2928c42 | 806 | |
ec80fde7 ACM |
807 | static bool symbol__restricted_filename(const char *filename, |
808 | const char *restricted_filename) | |
809 | { | |
810 | bool restricted = false; | |
811 | ||
812 | if (symbol_conf.kptr_restrict) { | |
813 | char *r = realpath(filename, NULL); | |
814 | ||
815 | if (r != NULL) { | |
816 | restricted = strcmp(r, restricted_filename) == 0; | |
817 | free(r); | |
818 | return restricted; | |
819 | } | |
820 | } | |
821 | ||
822 | return restricted; | |
823 | } | |
824 | ||
aeafcbaf | 825 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 826 | struct map *map, symbol_filter_t filter) |
2e538c4a | 827 | { |
ec80fde7 ACM |
828 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
829 | return -1; | |
830 | ||
aeafcbaf | 831 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
832 | return -1; |
833 | ||
694bf407 | 834 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
835 | symbols__fixup_end(&dso->symbols[map->type]); |
836 | ||
aeafcbaf | 837 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
44f24cb3 | 838 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |
a1645ce1 | 839 | else |
44f24cb3 | 840 | dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; |
2e538c4a | 841 | |
aeafcbaf | 842 | return dso__split_kallsyms(dso, map, filter); |
af427bf5 ACM |
843 | } |
844 | ||
aeafcbaf | 845 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 846 | symbol_filter_t filter) |
80d496be PE |
847 | { |
848 | char *line = NULL; | |
849 | size_t n; | |
850 | FILE *file; | |
851 | int nr_syms = 0; | |
852 | ||
aeafcbaf | 853 | file = fopen(dso->long_name, "r"); |
80d496be PE |
854 | if (file == NULL) |
855 | goto out_failure; | |
856 | ||
857 | while (!feof(file)) { | |
9cffa8d5 | 858 | u64 start, size; |
80d496be PE |
859 | struct symbol *sym; |
860 | int line_len, len; | |
861 | ||
862 | line_len = getline(&line, &n, file); | |
863 | if (line_len < 0) | |
864 | break; | |
865 | ||
866 | if (!line) | |
867 | goto out_failure; | |
868 | ||
869 | line[--line_len] = '\0'; /* \n */ | |
870 | ||
871 | len = hex2u64(line, &start); | |
872 | ||
873 | len++; | |
874 | if (len + 2 >= line_len) | |
875 | continue; | |
876 | ||
877 | len += hex2u64(line + len, &size); | |
878 | ||
879 | len++; | |
880 | if (len + 2 >= line_len) | |
881 | continue; | |
882 | ||
c408fedf | 883 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
884 | |
885 | if (sym == NULL) | |
886 | goto out_delete_line; | |
887 | ||
439d473b | 888 | if (filter && filter(map, sym)) |
00a192b3 | 889 | symbol__delete(sym); |
80d496be | 890 | else { |
aeafcbaf | 891 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
892 | nr_syms++; |
893 | } | |
894 | } | |
895 | ||
896 | free(line); | |
897 | fclose(file); | |
898 | ||
899 | return nr_syms; | |
900 | ||
901 | out_delete_line: | |
902 | free(line); | |
903 | out_failure: | |
904 | return -1; | |
905 | } | |
906 | ||
a2928c42 ACM |
907 | /** |
908 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
909 | * | |
aeafcbaf | 910 | * @syms: struct elf_symtab instance to iterate |
83a0944f | 911 | * @idx: uint32_t idx |
a2928c42 ACM |
912 | * @sym: GElf_Sym iterator |
913 | */ | |
83a0944f IM |
914 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
915 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
916 | idx < nr_syms; \ | |
917 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
918 | |
919 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
920 | { | |
921 | return GELF_ST_TYPE(sym->st_info); | |
922 | } | |
923 | ||
924 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
925 | { | |
926 | return elf_sym__type(sym) == STT_FUNC && | |
927 | sym->st_name != 0 && | |
81833130 | 928 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
929 | } |
930 | ||
f1dfa0b1 ACM |
931 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
932 | { | |
933 | return elf_sym__type(sym) == STT_OBJECT && | |
934 | sym->st_name != 0 && | |
935 | sym->st_shndx != SHN_UNDEF; | |
936 | } | |
937 | ||
6cfcc53e MG |
938 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
939 | { | |
940 | return elf_sym__type(sym) == STT_NOTYPE && | |
941 | sym->st_name != 0 && | |
942 | sym->st_shndx != SHN_UNDEF && | |
943 | sym->st_shndx != SHN_ABS; | |
944 | } | |
945 | ||
946 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
947 | const Elf_Data *secstrs) | |
948 | { | |
949 | return secstrs->d_buf + shdr->sh_name; | |
950 | } | |
951 | ||
952 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
953 | const Elf_Data *secstrs) | |
954 | { | |
955 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
956 | } | |
957 | ||
f1dfa0b1 ACM |
958 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
959 | const Elf_Data *secstrs) | |
960 | { | |
961 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
962 | } | |
963 | ||
a2928c42 ACM |
964 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
965 | const Elf_Data *symstrs) | |
966 | { | |
967 | return symstrs->d_buf + sym->st_name; | |
968 | } | |
969 | ||
970 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
971 | GElf_Shdr *shp, const char *name, | |
83a0944f | 972 | size_t *idx) |
a2928c42 ACM |
973 | { |
974 | Elf_Scn *sec = NULL; | |
975 | size_t cnt = 1; | |
976 | ||
977 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
978 | char *str; | |
979 | ||
980 | gelf_getshdr(sec, shp); | |
981 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
982 | if (!strcmp(name, str)) { | |
83a0944f IM |
983 | if (idx) |
984 | *idx = cnt; | |
a2928c42 ACM |
985 | break; |
986 | } | |
987 | ++cnt; | |
988 | } | |
989 | ||
990 | return sec; | |
991 | } | |
992 | ||
8ce998d6 ACM |
993 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
994 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
995 | idx < nr_entries; \ | |
996 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
997 | ||
998 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
999 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
1000 | idx < nr_entries; \ | |
1001 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
1002 | ||
a25e46c4 ACM |
1003 | /* |
1004 | * We need to check if we have a .dynsym, so that we can handle the | |
1005 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
1006 | * .dynsym or .symtab). | |
1007 | * And always look at the original dso, not at debuginfo packages, that | |
1008 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
1009 | */ | |
33ff581e JO |
1010 | static int |
1011 | dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, | |
1012 | symbol_filter_t filter) | |
8ce998d6 ACM |
1013 | { |
1014 | uint32_t nr_rel_entries, idx; | |
1015 | GElf_Sym sym; | |
9cffa8d5 | 1016 | u64 plt_offset; |
8ce998d6 ACM |
1017 | GElf_Shdr shdr_plt; |
1018 | struct symbol *f; | |
a25e46c4 | 1019 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 1020 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
1021 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
1022 | size_t dynsym_idx; | |
1023 | GElf_Ehdr ehdr; | |
8ce998d6 | 1024 | char sympltname[1024]; |
a25e46c4 ACM |
1025 | Elf *elf; |
1026 | int nr = 0, symidx, fd, err = 0; | |
1027 | ||
ec5761ea | 1028 | fd = open(name, O_RDONLY); |
a25e46c4 ACM |
1029 | if (fd < 0) |
1030 | goto out; | |
1031 | ||
84087126 | 1032 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
1033 | if (elf == NULL) |
1034 | goto out_close; | |
1035 | ||
1036 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
1037 | goto out_elf_end; | |
1038 | ||
1039 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
1040 | ".dynsym", &dynsym_idx); | |
1041 | if (scn_dynsym == NULL) | |
1042 | goto out_elf_end; | |
8ce998d6 | 1043 | |
a25e46c4 | 1044 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
1045 | ".rela.plt", NULL); |
1046 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 1047 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
1048 | ".rel.plt", NULL); |
1049 | if (scn_plt_rel == NULL) | |
a25e46c4 | 1050 | goto out_elf_end; |
8ce998d6 ACM |
1051 | } |
1052 | ||
a25e46c4 ACM |
1053 | err = -1; |
1054 | ||
8ce998d6 | 1055 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 1056 | goto out_elf_end; |
8ce998d6 | 1057 | |
a25e46c4 ACM |
1058 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
1059 | goto out_elf_end; | |
8ce998d6 ACM |
1060 | |
1061 | /* | |
83a0944f | 1062 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
1063 | * and the symbols in the .dynsym they refer to. |
1064 | */ | |
1065 | reldata = elf_getdata(scn_plt_rel, NULL); | |
1066 | if (reldata == NULL) | |
a25e46c4 | 1067 | goto out_elf_end; |
8ce998d6 ACM |
1068 | |
1069 | syms = elf_getdata(scn_dynsym, NULL); | |
1070 | if (syms == NULL) | |
a25e46c4 | 1071 | goto out_elf_end; |
8ce998d6 | 1072 | |
a25e46c4 | 1073 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 1074 | if (scn_symstrs == NULL) |
a25e46c4 | 1075 | goto out_elf_end; |
8ce998d6 ACM |
1076 | |
1077 | symstrs = elf_getdata(scn_symstrs, NULL); | |
1078 | if (symstrs == NULL) | |
a25e46c4 | 1079 | goto out_elf_end; |
8ce998d6 ACM |
1080 | |
1081 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
1082 | plt_offset = shdr_plt.sh_offset; | |
1083 | ||
1084 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
1085 | GElf_Rela pos_mem, *pos; | |
1086 | ||
1087 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
1088 | nr_rel_entries) { | |
1089 | symidx = GELF_R_SYM(pos->r_info); | |
1090 | plt_offset += shdr_plt.sh_entsize; | |
1091 | gelf_getsym(syms, symidx, &sym); | |
1092 | snprintf(sympltname, sizeof(sympltname), | |
1093 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1094 | ||
1095 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1096 | STB_GLOBAL, sympltname); |
8ce998d6 | 1097 | if (!f) |
a25e46c4 | 1098 | goto out_elf_end; |
8ce998d6 | 1099 | |
82164161 ACM |
1100 | if (filter && filter(map, f)) |
1101 | symbol__delete(f); | |
1102 | else { | |
aeafcbaf | 1103 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1104 | ++nr; |
1105 | } | |
8ce998d6 ACM |
1106 | } |
1107 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
1108 | GElf_Rel pos_mem, *pos; | |
1109 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
1110 | nr_rel_entries) { | |
1111 | symidx = GELF_R_SYM(pos->r_info); | |
1112 | plt_offset += shdr_plt.sh_entsize; | |
1113 | gelf_getsym(syms, symidx, &sym); | |
1114 | snprintf(sympltname, sizeof(sympltname), | |
1115 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1116 | ||
1117 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1118 | STB_GLOBAL, sympltname); |
8ce998d6 | 1119 | if (!f) |
a25e46c4 | 1120 | goto out_elf_end; |
8ce998d6 | 1121 | |
82164161 ACM |
1122 | if (filter && filter(map, f)) |
1123 | symbol__delete(f); | |
1124 | else { | |
aeafcbaf | 1125 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1126 | ++nr; |
1127 | } | |
8ce998d6 | 1128 | } |
8ce998d6 ACM |
1129 | } |
1130 | ||
a25e46c4 ACM |
1131 | err = 0; |
1132 | out_elf_end: | |
1133 | elf_end(elf); | |
1134 | out_close: | |
1135 | close(fd); | |
1136 | ||
1137 | if (err == 0) | |
1138 | return nr; | |
1139 | out: | |
fe2197b8 | 1140 | pr_debug("%s: problems reading %s PLT info.\n", |
aeafcbaf | 1141 | __func__, dso->long_name); |
a25e46c4 | 1142 | return 0; |
8ce998d6 ACM |
1143 | } |
1144 | ||
aeafcbaf | 1145 | static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type) |
d45868d3 ACM |
1146 | { |
1147 | switch (type) { | |
1148 | case MAP__FUNCTION: | |
aeafcbaf | 1149 | return elf_sym__is_function(sym); |
f1dfa0b1 | 1150 | case MAP__VARIABLE: |
aeafcbaf | 1151 | return elf_sym__is_object(sym); |
d45868d3 ACM |
1152 | default: |
1153 | return false; | |
1154 | } | |
1155 | } | |
1156 | ||
aeafcbaf ACM |
1157 | static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs, |
1158 | enum map_type type) | |
d45868d3 ACM |
1159 | { |
1160 | switch (type) { | |
1161 | case MAP__FUNCTION: | |
aeafcbaf | 1162 | return elf_sec__is_text(shdr, secstrs); |
f1dfa0b1 | 1163 | case MAP__VARIABLE: |
aeafcbaf | 1164 | return elf_sec__is_data(shdr, secstrs); |
d45868d3 ACM |
1165 | default: |
1166 | return false; | |
1167 | } | |
1168 | } | |
1169 | ||
70c3856b EM |
1170 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
1171 | { | |
1172 | Elf_Scn *sec = NULL; | |
1173 | GElf_Shdr shdr; | |
1174 | size_t cnt = 1; | |
1175 | ||
1176 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
1177 | gelf_getshdr(sec, &shdr); | |
1178 | ||
1179 | if ((addr >= shdr.sh_addr) && | |
1180 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
1181 | return cnt; | |
1182 | ||
1183 | ++cnt; | |
1184 | } | |
1185 | ||
1186 | return -1; | |
1187 | } | |
1188 | ||
8db4841f JO |
1189 | static int dso__swap_init(struct dso *dso, unsigned char eidata) |
1190 | { | |
1191 | static unsigned int const endian = 1; | |
1192 | ||
1193 | dso->needs_swap = DSO_SWAP__NO; | |
1194 | ||
1195 | switch (eidata) { | |
1196 | case ELFDATA2LSB: | |
1197 | /* We are big endian, DSO is little endian. */ | |
1198 | if (*(unsigned char const *)&endian != 1) | |
1199 | dso->needs_swap = DSO_SWAP__YES; | |
1200 | break; | |
1201 | ||
1202 | case ELFDATA2MSB: | |
1203 | /* We are little endian, DSO is big endian. */ | |
1204 | if (*(unsigned char const *)&endian != 0) | |
1205 | dso->needs_swap = DSO_SWAP__YES; | |
1206 | break; | |
1207 | ||
1208 | default: | |
1209 | pr_err("unrecognized DSO data encoding %d\n", eidata); | |
1210 | return -EINVAL; | |
1211 | } | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
aeafcbaf | 1216 | static int dso__load_sym(struct dso *dso, struct map *map, const char *name, |
6da80ce8 DM |
1217 | int fd, symbol_filter_t filter, int kmodule, |
1218 | int want_symtab) | |
a2928c42 | 1219 | { |
aeafcbaf | 1220 | struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL; |
2e538c4a | 1221 | struct map *curr_map = map; |
aeafcbaf | 1222 | struct dso *curr_dso = dso; |
6cfcc53e | 1223 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1224 | uint32_t nr_syms; |
1225 | int err = -1; | |
83a0944f | 1226 | uint32_t idx; |
a2928c42 | 1227 | GElf_Ehdr ehdr; |
70c3856b EM |
1228 | GElf_Shdr shdr, opdshdr; |
1229 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1230 | GElf_Sym sym; |
70c3856b | 1231 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1232 | Elf *elf; |
439d473b | 1233 | int nr = 0; |
70c3856b | 1234 | size_t opdidx = 0; |
a2928c42 | 1235 | |
84087126 | 1236 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1237 | if (elf == NULL) { |
8b1389ef | 1238 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1239 | goto out_close; |
1240 | } | |
1241 | ||
1242 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1243 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1244 | goto out_elf_end; |
1245 | } | |
1246 | ||
8db4841f JO |
1247 | if (dso__swap_init(dso, ehdr.e_ident[EI_DATA])) |
1248 | goto out_elf_end; | |
1249 | ||
6da80ce8 | 1250 | /* Always reject images with a mismatched build-id: */ |
aeafcbaf | 1251 | if (dso->has_build_id) { |
21916c38 DM |
1252 | u8 build_id[BUILD_ID_SIZE]; |
1253 | ||
be96ea8f | 1254 | if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0) |
21916c38 DM |
1255 | goto out_elf_end; |
1256 | ||
aeafcbaf | 1257 | if (!dso__build_id_equal(dso, build_id)) |
21916c38 DM |
1258 | goto out_elf_end; |
1259 | } | |
1260 | ||
a2928c42 | 1261 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1262 | if (sec == NULL) { |
6da80ce8 DM |
1263 | if (want_symtab) |
1264 | goto out_elf_end; | |
1265 | ||
a25e46c4 ACM |
1266 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1267 | if (sec == NULL) | |
8ce998d6 | 1268 | goto out_elf_end; |
8ce998d6 | 1269 | } |
a2928c42 | 1270 | |
70c3856b | 1271 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
adb09184 AB |
1272 | if (opdshdr.sh_type != SHT_PROGBITS) |
1273 | opdsec = NULL; | |
70c3856b EM |
1274 | if (opdsec) |
1275 | opddata = elf_rawdata(opdsec, NULL); | |
1276 | ||
a2928c42 ACM |
1277 | syms = elf_getdata(sec, NULL); |
1278 | if (syms == NULL) | |
1279 | goto out_elf_end; | |
1280 | ||
1281 | sec = elf_getscn(elf, shdr.sh_link); | |
1282 | if (sec == NULL) | |
1283 | goto out_elf_end; | |
1284 | ||
1285 | symstrs = elf_getdata(sec, NULL); | |
1286 | if (symstrs == NULL) | |
1287 | goto out_elf_end; | |
1288 | ||
6cfcc53e MG |
1289 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1290 | if (sec_strndx == NULL) | |
1291 | goto out_elf_end; | |
1292 | ||
1293 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1294 | if (secstrs == NULL) |
6cfcc53e MG |
1295 | goto out_elf_end; |
1296 | ||
a2928c42 ACM |
1297 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1298 | ||
e9fbc9dc | 1299 | memset(&sym, 0, sizeof(sym)); |
aeafcbaf ACM |
1300 | if (dso->kernel == DSO_TYPE_USER) { |
1301 | dso->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
1302 | elf_section_by_name(elf, &ehdr, &shdr, |
1303 | ".gnu.prelink_undo", | |
1304 | NULL) != NULL); | |
aeafcbaf ACM |
1305 | } else { |
1306 | dso->adjust_symbols = 0; | |
1307 | } | |
83a0944f | 1308 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1309 | struct symbol *f; |
56b03f3c | 1310 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1311 | char *demangled = NULL; |
6cfcc53e MG |
1312 | int is_label = elf_sym__is_label(&sym); |
1313 | const char *section_name; | |
a2928c42 | 1314 | |
9de89fe7 ACM |
1315 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1316 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1317 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1318 | |
d45868d3 | 1319 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1320 | continue; |
1321 | ||
696b97a5 DM |
1322 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1323 | * don't identify functions, so will confuse the profile | |
1324 | * output: */ | |
1325 | if (ehdr.e_machine == EM_ARM) { | |
1326 | if (!strcmp(elf_name, "$a") || | |
1327 | !strcmp(elf_name, "$d") || | |
1328 | !strcmp(elf_name, "$t")) | |
1329 | continue; | |
1330 | } | |
1331 | ||
70c3856b EM |
1332 | if (opdsec && sym.st_shndx == opdidx) { |
1333 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1334 | u64 *opd = opddata->d_buf + offset; | |
8db4841f | 1335 | sym.st_value = DSO__SWAP(dso, u64, *opd); |
70c3856b EM |
1336 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); |
1337 | } | |
1338 | ||
a2928c42 ACM |
1339 | sec = elf_getscn(elf, sym.st_shndx); |
1340 | if (!sec) | |
1341 | goto out_elf_end; | |
1342 | ||
1343 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1344 | |
d45868d3 | 1345 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1346 | continue; |
1347 | ||
1348 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1349 | |
b2f8fb23 DDAG |
1350 | /* On ARM, symbols for thumb functions have 1 added to |
1351 | * the symbol address as a flag - remove it */ | |
1352 | if ((ehdr.e_machine == EM_ARM) && | |
1353 | (map->type == MAP__FUNCTION) && | |
1354 | (sym.st_value & 1)) | |
1355 | --sym.st_value; | |
1356 | ||
aeafcbaf | 1357 | if (dso->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1358 | char dso_name[PATH_MAX]; |
1359 | ||
1360 | if (strcmp(section_name, | |
b63be8d7 | 1361 | (curr_dso->short_name + |
aeafcbaf | 1362 | dso->short_name_len)) == 0) |
2e538c4a ACM |
1363 | goto new_symbol; |
1364 | ||
1365 | if (strcmp(section_name, ".text") == 0) { | |
1366 | curr_map = map; | |
aeafcbaf | 1367 | curr_dso = dso; |
2e538c4a ACM |
1368 | goto new_symbol; |
1369 | } | |
1370 | ||
1371 | snprintf(dso_name, sizeof(dso_name), | |
aeafcbaf | 1372 | "%s%s", dso->short_name, section_name); |
2e538c4a | 1373 | |
9de89fe7 | 1374 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1375 | if (curr_map == NULL) { |
1376 | u64 start = sym.st_value; | |
1377 | ||
1378 | if (kmodule) | |
1379 | start += map->start + shdr.sh_offset; | |
1380 | ||
00a192b3 | 1381 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1382 | if (curr_dso == NULL) |
1383 | goto out_elf_end; | |
aeafcbaf ACM |
1384 | curr_dso->kernel = dso->kernel; |
1385 | curr_dso->long_name = dso->long_name; | |
1386 | curr_dso->long_name_len = dso->long_name_len; | |
3610583c | 1387 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1388 | map->type); |
2e538c4a ACM |
1389 | if (curr_map == NULL) { |
1390 | dso__delete(curr_dso); | |
1391 | goto out_elf_end; | |
1392 | } | |
ed52ce2e ACM |
1393 | curr_map->map_ip = identity__map_ip; |
1394 | curr_map->unmap_ip = identity__map_ip; | |
aeafcbaf | 1395 | curr_dso->symtab_type = dso->symtab_type; |
9de89fe7 | 1396 | map_groups__insert(kmap->kmaps, curr_map); |
aeafcbaf | 1397 | dsos__add(&dso->node, curr_dso); |
6275ce2d | 1398 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1399 | } else |
1400 | curr_dso = curr_map->dso; | |
1401 | ||
1402 | goto new_symbol; | |
af427bf5 ACM |
1403 | } |
1404 | ||
2e538c4a | 1405 | if (curr_dso->adjust_symbols) { |
9486aa38 ACM |
1406 | pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " " |
1407 | "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__, | |
29a9f66d ACM |
1408 | (u64)sym.st_value, (u64)shdr.sh_addr, |
1409 | (u64)shdr.sh_offset); | |
f5812a7a | 1410 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1411 | } |
28ac909b ACM |
1412 | /* |
1413 | * We need to figure out if the object was created from C++ sources | |
1414 | * DWARF DW_compile_unit has this, but we don't always have access | |
1415 | * to it... | |
1416 | */ | |
83a0944f | 1417 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1418 | if (demangled != NULL) |
83a0944f | 1419 | elf_name = demangled; |
2e538c4a | 1420 | new_symbol: |
c408fedf ACM |
1421 | f = symbol__new(sym.st_value, sym.st_size, |
1422 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1423 | free(demangled); |
a2928c42 ACM |
1424 | if (!f) |
1425 | goto out_elf_end; | |
1426 | ||
2e538c4a | 1427 | if (filter && filter(curr_map, f)) |
00a192b3 | 1428 | symbol__delete(f); |
69ee69f6 | 1429 | else { |
6a4694a4 | 1430 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1431 | nr++; |
1432 | } | |
a2928c42 ACM |
1433 | } |
1434 | ||
2e538c4a ACM |
1435 | /* |
1436 | * For misannotated, zeroed, ASM function sizes. | |
1437 | */ | |
6275ce2d | 1438 | if (nr > 0) { |
694bf407 | 1439 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
aeafcbaf | 1440 | symbols__fixup_end(&dso->symbols[map->type]); |
6275ce2d ACM |
1441 | if (kmap) { |
1442 | /* | |
1443 | * We need to fixup this here too because we create new | |
1444 | * maps here, for things like vsyscall sections. | |
1445 | */ | |
1446 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1447 | } | |
1448 | } | |
a2928c42 ACM |
1449 | err = nr; |
1450 | out_elf_end: | |
1451 | elf_end(elf); | |
1452 | out_close: | |
1453 | return err; | |
1454 | } | |
1455 | ||
aeafcbaf | 1456 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id) |
78075caa | 1457 | { |
aeafcbaf | 1458 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; |
78075caa ACM |
1459 | } |
1460 | ||
a1645ce1 | 1461 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1462 | { |
e30a3d12 | 1463 | bool have_build_id = false; |
57f395a7 FW |
1464 | struct dso *pos; |
1465 | ||
6122e4e4 ACM |
1466 | list_for_each_entry(pos, head, node) { |
1467 | if (with_hits && !pos->hit) | |
1468 | continue; | |
f6e1467d ACM |
1469 | if (pos->has_build_id) { |
1470 | have_build_id = true; | |
1471 | continue; | |
1472 | } | |
e30a3d12 ACM |
1473 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1474 | sizeof(pos->build_id)) > 0) { | |
1475 | have_build_id = true; | |
1476 | pos->has_build_id = true; | |
1477 | } | |
6122e4e4 | 1478 | } |
57f395a7 | 1479 | |
e30a3d12 | 1480 | return have_build_id; |
57f395a7 FW |
1481 | } |
1482 | ||
fd7a346e ACM |
1483 | /* |
1484 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1485 | */ | |
1486 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1487 | ||
21916c38 | 1488 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1489 | { |
21916c38 | 1490 | int err = -1; |
4d1e00a8 ACM |
1491 | GElf_Ehdr ehdr; |
1492 | GElf_Shdr shdr; | |
fd7a346e | 1493 | Elf_Data *data; |
4d1e00a8 | 1494 | Elf_Scn *sec; |
e57cfcda | 1495 | Elf_Kind ek; |
fd7a346e | 1496 | void *ptr; |
4d1e00a8 | 1497 | |
2643ce11 ACM |
1498 | if (size < BUILD_ID_SIZE) |
1499 | goto out; | |
1500 | ||
e57cfcda PE |
1501 | ek = elf_kind(elf); |
1502 | if (ek != ELF_K_ELF) | |
21916c38 | 1503 | goto out; |
e57cfcda | 1504 | |
4d1e00a8 | 1505 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1506 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1507 | goto out; |
4d1e00a8 ACM |
1508 | } |
1509 | ||
1388d715 JO |
1510 | /* |
1511 | * Check following sections for notes: | |
1512 | * '.note.gnu.build-id' | |
1513 | * '.notes' | |
1514 | * '.note' (VDSO specific) | |
1515 | */ | |
1516 | do { | |
1517 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1518 | ".note.gnu.build-id", NULL); | |
1519 | if (sec) | |
1520 | break; | |
1521 | ||
fd7a346e ACM |
1522 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1523 | ".notes", NULL); | |
1388d715 JO |
1524 | if (sec) |
1525 | break; | |
1526 | ||
1527 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1528 | ".note", NULL); | |
1529 | if (sec) | |
1530 | break; | |
1531 | ||
1532 | return err; | |
1533 | ||
1534 | } while (0); | |
4d1e00a8 | 1535 | |
fd7a346e ACM |
1536 | data = elf_getdata(sec, NULL); |
1537 | if (data == NULL) | |
21916c38 | 1538 | goto out; |
fd7a346e ACM |
1539 | |
1540 | ptr = data->d_buf; | |
1541 | while (ptr < (data->d_buf + data->d_size)) { | |
1542 | GElf_Nhdr *nhdr = ptr; | |
be96ea8f SE |
1543 | size_t namesz = NOTE_ALIGN(nhdr->n_namesz), |
1544 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
fd7a346e ACM |
1545 | const char *name; |
1546 | ||
1547 | ptr += sizeof(*nhdr); | |
1548 | name = ptr; | |
1549 | ptr += namesz; | |
1550 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1551 | nhdr->n_namesz == sizeof("GNU")) { | |
1552 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1553 | size_t sz = min(size, descsz); |
1554 | memcpy(bf, ptr, sz); | |
1555 | memset(bf + sz, 0, size - sz); | |
1556 | err = descsz; | |
fd7a346e ACM |
1557 | break; |
1558 | } | |
1559 | } | |
1560 | ptr += descsz; | |
1561 | } | |
21916c38 DM |
1562 | |
1563 | out: | |
1564 | return err; | |
1565 | } | |
1566 | ||
1567 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1568 | { | |
1569 | int fd, err = -1; | |
1570 | Elf *elf; | |
1571 | ||
1572 | if (size < BUILD_ID_SIZE) | |
1573 | goto out; | |
1574 | ||
1575 | fd = open(filename, O_RDONLY); | |
1576 | if (fd < 0) | |
1577 | goto out; | |
1578 | ||
1579 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1580 | if (elf == NULL) { | |
1581 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1582 | goto out_close; | |
1583 | } | |
1584 | ||
1585 | err = elf_read_build_id(elf, bf, size); | |
1586 | ||
2643ce11 ACM |
1587 | elf_end(elf); |
1588 | out_close: | |
1589 | close(fd); | |
1590 | out: | |
1591 | return err; | |
1592 | } | |
1593 | ||
f1617b40 ACM |
1594 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1595 | { | |
1596 | int fd, err = -1; | |
1597 | ||
1598 | if (size < BUILD_ID_SIZE) | |
1599 | goto out; | |
1600 | ||
1601 | fd = open(filename, O_RDONLY); | |
1602 | if (fd < 0) | |
1603 | goto out; | |
1604 | ||
1605 | while (1) { | |
1606 | char bf[BUFSIZ]; | |
1607 | GElf_Nhdr nhdr; | |
be96ea8f | 1608 | size_t namesz, descsz; |
f1617b40 ACM |
1609 | |
1610 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1611 | break; | |
1612 | ||
fd7a346e ACM |
1613 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1614 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1615 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1616 | nhdr.n_namesz == sizeof("GNU")) { | |
be96ea8f | 1617 | if (read(fd, bf, namesz) != (ssize_t)namesz) |
f1617b40 ACM |
1618 | break; |
1619 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1620 | size_t sz = min(descsz, size); |
1621 | if (read(fd, build_id, sz) == (ssize_t)sz) { | |
1622 | memset(build_id + sz, 0, size - sz); | |
f1617b40 ACM |
1623 | err = 0; |
1624 | break; | |
1625 | } | |
be96ea8f | 1626 | } else if (read(fd, bf, descsz) != (ssize_t)descsz) |
f1617b40 ACM |
1627 | break; |
1628 | } else { | |
1629 | int n = namesz + descsz; | |
1630 | if (read(fd, bf, n) != n) | |
1631 | break; | |
1632 | } | |
1633 | } | |
1634 | close(fd); | |
1635 | out: | |
1636 | return err; | |
1637 | } | |
1638 | ||
209bd9e3 PLG |
1639 | static int filename__read_debuglink(const char *filename, |
1640 | char *debuglink, size_t size) | |
1641 | { | |
1642 | int fd, err = -1; | |
1643 | Elf *elf; | |
1644 | GElf_Ehdr ehdr; | |
1645 | GElf_Shdr shdr; | |
1646 | Elf_Data *data; | |
1647 | Elf_Scn *sec; | |
1648 | Elf_Kind ek; | |
1649 | ||
1650 | fd = open(filename, O_RDONLY); | |
1651 | if (fd < 0) | |
1652 | goto out; | |
1653 | ||
1654 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1655 | if (elf == NULL) { | |
1656 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1657 | goto out_close; | |
1658 | } | |
1659 | ||
1660 | ek = elf_kind(elf); | |
1661 | if (ek != ELF_K_ELF) | |
1662 | goto out_close; | |
1663 | ||
1664 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
1665 | pr_err("%s: cannot get elf header.\n", __func__); | |
1666 | goto out_close; | |
1667 | } | |
1668 | ||
1669 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1670 | ".gnu_debuglink", NULL); | |
1671 | if (sec == NULL) | |
1672 | goto out_close; | |
1673 | ||
1674 | data = elf_getdata(sec, NULL); | |
1675 | if (data == NULL) | |
1676 | goto out_close; | |
1677 | ||
1678 | /* the start of this section is a zero-terminated string */ | |
1679 | strncpy(debuglink, data->d_buf, size); | |
1680 | ||
1681 | elf_end(elf); | |
1682 | ||
1683 | out_close: | |
1684 | close(fd); | |
1685 | out: | |
1686 | return err; | |
1687 | } | |
1688 | ||
aeafcbaf | 1689 | char dso__symtab_origin(const struct dso *dso) |
94cb9e38 ACM |
1690 | { |
1691 | static const char origin[] = { | |
44f24cb3 JO |
1692 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
1693 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
1694 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
1695 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
1696 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
1697 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
1698 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
1699 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
1700 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
1701 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', | |
1702 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1703 | }; |
1704 | ||
44f24cb3 | 1705 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) |
94cb9e38 | 1706 | return '!'; |
aeafcbaf | 1707 | return origin[dso->symtab_type]; |
94cb9e38 ACM |
1708 | } |
1709 | ||
44f24cb3 JO |
1710 | int dso__binary_type_file(struct dso *dso, enum dso_binary_type type, |
1711 | char *root_dir, char *file, size_t size) | |
1712 | { | |
1713 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1714 | int ret = 0; | |
1715 | ||
1716 | switch (type) { | |
1717 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
1718 | char *debuglink; | |
1719 | ||
1720 | strncpy(file, dso->long_name, size); | |
1721 | debuglink = file + dso->long_name_len; | |
1722 | while (debuglink != file && *debuglink != '/') | |
1723 | debuglink--; | |
1724 | if (*debuglink == '/') | |
1725 | debuglink++; | |
1726 | filename__read_debuglink(dso->long_name, debuglink, | |
1727 | size - (debuglink - file)); | |
1728 | } | |
1729 | break; | |
1730 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
1731 | /* skip the locally configured cache if a symfs is given */ | |
1732 | if (symbol_conf.symfs[0] || | |
1733 | (dso__build_id_filename(dso, file, size) == NULL)) | |
1734 | ret = -1; | |
1735 | break; | |
1736 | ||
1737 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
1738 | snprintf(file, size, "%s/usr/lib/debug%s.debug", | |
1739 | symbol_conf.symfs, dso->long_name); | |
1740 | break; | |
1741 | ||
1742 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
1743 | snprintf(file, size, "%s/usr/lib/debug%s", | |
1744 | symbol_conf.symfs, dso->long_name); | |
1745 | break; | |
1746 | ||
1747 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
1748 | if (!dso->has_build_id) { | |
1749 | ret = -1; | |
1750 | break; | |
1751 | } | |
1752 | ||
1753 | build_id__sprintf(dso->build_id, | |
1754 | sizeof(dso->build_id), | |
1755 | build_id_hex); | |
1756 | snprintf(file, size, | |
1757 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", | |
1758 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
1759 | break; | |
1760 | ||
1761 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
1762 | snprintf(file, size, "%s%s", | |
1763 | symbol_conf.symfs, dso->long_name); | |
1764 | break; | |
1765 | ||
1766 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
1767 | snprintf(file, size, "%s%s%s", symbol_conf.symfs, | |
1768 | root_dir, dso->long_name); | |
1769 | break; | |
1770 | ||
1771 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
1772 | snprintf(file, size, "%s%s", symbol_conf.symfs, | |
1773 | dso->long_name); | |
1774 | break; | |
1775 | ||
1776 | default: | |
1777 | case DSO_BINARY_TYPE__KALLSYMS: | |
1778 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
1779 | case DSO_BINARY_TYPE__JAVA_JIT: | |
1780 | case DSO_BINARY_TYPE__NOT_FOUND: | |
1781 | ret = -1; | |
1782 | break; | |
1783 | } | |
1784 | ||
1785 | return ret; | |
1786 | } | |
1787 | ||
aeafcbaf | 1788 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1789 | { |
c338aee8 | 1790 | char *name; |
a2928c42 ACM |
1791 | int ret = -1; |
1792 | int fd; | |
44f24cb3 | 1793 | u_int i; |
23346f21 | 1794 | struct machine *machine; |
44f24cb3 | 1795 | char *root_dir = (char *) ""; |
6da80ce8 | 1796 | int want_symtab; |
a2928c42 | 1797 | |
aeafcbaf | 1798 | dso__set_loaded(dso, map->type); |
66bd8424 | 1799 | |
aeafcbaf ACM |
1800 | if (dso->kernel == DSO_TYPE_KERNEL) |
1801 | return dso__load_kernel_sym(dso, map, filter); | |
1802 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1803 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1804 | |
23346f21 ACM |
1805 | if (map->groups && map->groups->machine) |
1806 | machine = map->groups->machine; | |
a1645ce1 | 1807 | else |
23346f21 | 1808 | machine = NULL; |
c338aee8 | 1809 | |
44f24cb3 | 1810 | name = malloc(PATH_MAX); |
a2928c42 ACM |
1811 | if (!name) |
1812 | return -1; | |
1813 | ||
aeafcbaf | 1814 | dso->adjust_symbols = 0; |
f5812a7a | 1815 | |
aeafcbaf | 1816 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1817 | struct stat st; |
1818 | ||
e9b52ef2 | 1819 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1820 | return -1; |
1821 | ||
1822 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1823 | pr_warning("File %s not owned by current user or root, " | |
1824 | "ignoring it.\n", dso->name); | |
1825 | return -1; | |
1826 | } | |
1827 | ||
aeafcbaf | 1828 | ret = dso__load_perf_map(dso, map, filter); |
44f24cb3 JO |
1829 | dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : |
1830 | DSO_BINARY_TYPE__NOT_FOUND; | |
94cb9e38 ACM |
1831 | return ret; |
1832 | } | |
1833 | ||
44f24cb3 JO |
1834 | if (machine) |
1835 | root_dir = machine->root_dir; | |
1836 | ||
6da80ce8 DM |
1837 | /* Iterate over candidate debug images. |
1838 | * On the first pass, only load images if they have a full symtab. | |
1839 | * Failing that, do a second pass where we accept .dynsym also | |
1840 | */ | |
60e4b10c ACM |
1841 | want_symtab = 1; |
1842 | restart: | |
44f24cb3 | 1843 | for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { |
6da80ce8 | 1844 | |
44f24cb3 | 1845 | dso->symtab_type = binary_type_symtab[i]; |
ec5761ea | 1846 | |
44f24cb3 JO |
1847 | if (dso__binary_type_file(dso, dso->symtab_type, |
1848 | root_dir, name, PATH_MAX)) | |
1849 | continue; | |
6da80ce8 DM |
1850 | |
1851 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1852 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1853 | if (fd < 0) |
1854 | continue; | |
a2928c42 | 1855 | |
aeafcbaf | 1856 | ret = dso__load_sym(dso, map, name, fd, filter, 0, |
6da80ce8 DM |
1857 | want_symtab); |
1858 | close(fd); | |
a2928c42 | 1859 | |
6da80ce8 DM |
1860 | /* |
1861 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1862 | * info!?!? | |
1863 | */ | |
1864 | if (!ret) | |
1865 | continue; | |
a2928c42 | 1866 | |
6da80ce8 | 1867 | if (ret > 0) { |
33ff581e JO |
1868 | int nr_plt; |
1869 | ||
1870 | nr_plt = dso__synthesize_plt_symbols(dso, name, map, filter); | |
6da80ce8 DM |
1871 | if (nr_plt > 0) |
1872 | ret += nr_plt; | |
1873 | break; | |
1874 | } | |
a25e46c4 | 1875 | } |
6da80ce8 | 1876 | |
60e4b10c ACM |
1877 | /* |
1878 | * If we wanted a full symtab but no image had one, | |
1879 | * relax our requirements and repeat the search. | |
1880 | */ | |
1881 | if (ret <= 0 && want_symtab) { | |
1882 | want_symtab = 0; | |
1883 | goto restart; | |
1884 | } | |
1885 | ||
a2928c42 | 1886 | free(name); |
aeafcbaf | 1887 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1888 | return 0; |
a2928c42 ACM |
1889 | return ret; |
1890 | } | |
1891 | ||
aeafcbaf | 1892 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1893 | enum map_type type, const char *name) |
439d473b ACM |
1894 | { |
1895 | struct rb_node *nd; | |
1896 | ||
aeafcbaf | 1897 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1898 | struct map *map = rb_entry(nd, struct map, rb_node); |
1899 | ||
b7cece76 | 1900 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1901 | return map; |
1902 | } | |
1903 | ||
1904 | return NULL; | |
1905 | } | |
1906 | ||
aeafcbaf ACM |
1907 | static int dso__kernel_module_get_build_id(struct dso *dso, |
1908 | const char *root_dir) | |
b7cece76 ACM |
1909 | { |
1910 | char filename[PATH_MAX]; | |
1911 | /* | |
1912 | * kernel module short names are of the form "[module]" and | |
1913 | * we need just "module" here. | |
1914 | */ | |
aeafcbaf | 1915 | const char *name = dso->short_name + 1; |
b7cece76 ACM |
1916 | |
1917 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1918 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1919 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 | 1920 | |
aeafcbaf ACM |
1921 | if (sysfs__read_build_id(filename, dso->build_id, |
1922 | sizeof(dso->build_id)) == 0) | |
1923 | dso->has_build_id = true; | |
b7cece76 ACM |
1924 | |
1925 | return 0; | |
1926 | } | |
1927 | ||
aeafcbaf | 1928 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
a1645ce1 | 1929 | const char *dir_name) |
6cfcc53e | 1930 | { |
439d473b | 1931 | struct dirent *dent; |
5aab621b | 1932 | DIR *dir = opendir(dir_name); |
74534341 | 1933 | int ret = 0; |
6cfcc53e | 1934 | |
439d473b | 1935 | if (!dir) { |
5aab621b | 1936 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1937 | return -1; |
1938 | } | |
6cfcc53e | 1939 | |
439d473b ACM |
1940 | while ((dent = readdir(dir)) != NULL) { |
1941 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1942 | struct stat st; |
1943 | ||
1944 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
2b600f95 | 1945 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); |
a1645ce1 ZY |
1946 | if (stat(path, &st)) |
1947 | continue; | |
439d473b | 1948 | |
a1645ce1 | 1949 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1950 | if (!strcmp(dent->d_name, ".") || |
1951 | !strcmp(dent->d_name, "..")) | |
1952 | continue; | |
1953 | ||
aeafcbaf | 1954 | ret = map_groups__set_modules_path_dir(mg, path); |
74534341 GJ |
1955 | if (ret < 0) |
1956 | goto out; | |
439d473b ACM |
1957 | } else { |
1958 | char *dot = strrchr(dent->d_name, '.'), | |
1959 | dso_name[PATH_MAX]; | |
1960 | struct map *map; | |
cfc10d3b | 1961 | char *long_name; |
439d473b ACM |
1962 | |
1963 | if (dot == NULL || strcmp(dot, ".ko")) | |
1964 | continue; | |
1965 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1966 | (int)(dot - dent->d_name), dent->d_name); | |
1967 | ||
a2a99e8e | 1968 | strxfrchar(dso_name, '-', '_'); |
aeafcbaf ACM |
1969 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
1970 | dso_name); | |
439d473b ACM |
1971 | if (map == NULL) |
1972 | continue; | |
1973 | ||
cfc10d3b | 1974 | long_name = strdup(path); |
74534341 GJ |
1975 | if (long_name == NULL) { |
1976 | ret = -1; | |
1977 | goto out; | |
1978 | } | |
cfc10d3b | 1979 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1980 | map->dso->lname_alloc = 1; |
a1645ce1 | 1981 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1982 | } |
439d473b | 1983 | } |
6cfcc53e | 1984 | |
74534341 | 1985 | out: |
439d473b | 1986 | closedir(dir); |
74534341 | 1987 | return ret; |
439d473b | 1988 | } |
6cfcc53e | 1989 | |
a1645ce1 | 1990 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1991 | { |
a1645ce1 ZY |
1992 | char version[PATH_MAX]; |
1993 | FILE *file; | |
1994 | char *name, *tmp; | |
1995 | const char *prefix = "Linux version "; | |
1996 | ||
1997 | sprintf(version, "%s/proc/version", root_dir); | |
1998 | file = fopen(version, "r"); | |
1999 | if (!file) | |
2000 | return NULL; | |
2001 | ||
2002 | version[0] = '\0'; | |
2003 | tmp = fgets(version, sizeof(version), file); | |
2004 | fclose(file); | |
2005 | ||
2006 | name = strstr(version, prefix); | |
2007 | if (!name) | |
2008 | return NULL; | |
2009 | name += strlen(prefix); | |
2010 | tmp = strchr(name, ' '); | |
2011 | if (tmp) | |
2012 | *tmp = '\0'; | |
2013 | ||
2014 | return strdup(name); | |
2015 | } | |
2016 | ||
aeafcbaf | 2017 | static int machine__set_modules_path(struct machine *machine) |
a1645ce1 ZY |
2018 | { |
2019 | char *version; | |
439d473b | 2020 | char modules_path[PATH_MAX]; |
6cfcc53e | 2021 | |
aeafcbaf | 2022 | version = get_kernel_version(machine->root_dir); |
a1645ce1 | 2023 | if (!version) |
439d473b | 2024 | return -1; |
6cfcc53e | 2025 | |
a1645ce1 | 2026 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
aeafcbaf | 2027 | machine->root_dir, version); |
a1645ce1 | 2028 | free(version); |
6cfcc53e | 2029 | |
aeafcbaf | 2030 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
6cfcc53e MG |
2031 | } |
2032 | ||
439d473b ACM |
2033 | /* |
2034 | * Constructor variant for modules (where we know from /proc/modules where | |
2035 | * they are loaded) and for vmlinux, where only after we load all the | |
2036 | * symbols we'll know where it starts and ends. | |
2037 | */ | |
3610583c | 2038 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 2039 | { |
aeafcbaf ACM |
2040 | struct map *map = calloc(1, (sizeof(*map) + |
2041 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
2042 | if (map != NULL) { | |
439d473b | 2043 | /* |
afb7b4f0 | 2044 | * ->end will be filled after we load all the symbols |
439d473b | 2045 | */ |
aeafcbaf | 2046 | map__init(map, type, start, 0, 0, dso); |
439d473b | 2047 | } |
afb7b4f0 | 2048 | |
aeafcbaf | 2049 | return map; |
439d473b ACM |
2050 | } |
2051 | ||
aeafcbaf | 2052 | struct map *machine__new_module(struct machine *machine, u64 start, |
d28c6223 | 2053 | const char *filename) |
b7cece76 ACM |
2054 | { |
2055 | struct map *map; | |
aeafcbaf | 2056 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
2057 | |
2058 | if (dso == NULL) | |
2059 | return NULL; | |
2060 | ||
2061 | map = map__new2(start, dso, MAP__FUNCTION); | |
2062 | if (map == NULL) | |
2063 | return NULL; | |
2064 | ||
aeafcbaf | 2065 | if (machine__is_host(machine)) |
44f24cb3 | 2066 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; |
a1645ce1 | 2067 | else |
44f24cb3 | 2068 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; |
aeafcbaf | 2069 | map_groups__insert(&machine->kmaps, map); |
b7cece76 ACM |
2070 | return map; |
2071 | } | |
2072 | ||
aeafcbaf | 2073 | static int machine__create_modules(struct machine *machine) |
439d473b ACM |
2074 | { |
2075 | char *line = NULL; | |
2076 | size_t n; | |
a1645ce1 | 2077 | FILE *file; |
439d473b | 2078 | struct map *map; |
a1645ce1 ZY |
2079 | const char *modules; |
2080 | char path[PATH_MAX]; | |
2081 | ||
aeafcbaf | 2082 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
2083 | modules = symbol_conf.default_guest_modules; |
2084 | else { | |
aeafcbaf | 2085 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
2086 | modules = path; |
2087 | } | |
6cfcc53e | 2088 | |
ec80fde7 ACM |
2089 | if (symbol__restricted_filename(path, "/proc/modules")) |
2090 | return -1; | |
2091 | ||
a1645ce1 | 2092 | file = fopen(modules, "r"); |
439d473b ACM |
2093 | if (file == NULL) |
2094 | return -1; | |
6cfcc53e | 2095 | |
439d473b ACM |
2096 | while (!feof(file)) { |
2097 | char name[PATH_MAX]; | |
2098 | u64 start; | |
439d473b ACM |
2099 | char *sep; |
2100 | int line_len; | |
6cfcc53e | 2101 | |
439d473b ACM |
2102 | line_len = getline(&line, &n, file); |
2103 | if (line_len < 0) | |
2104 | break; | |
2105 | ||
2106 | if (!line) | |
2107 | goto out_failure; | |
2108 | ||
2109 | line[--line_len] = '\0'; /* \n */ | |
2110 | ||
2111 | sep = strrchr(line, 'x'); | |
2112 | if (sep == NULL) | |
2113 | continue; | |
2114 | ||
2115 | hex2u64(sep + 1, &start); | |
2116 | ||
2117 | sep = strchr(line, ' '); | |
2118 | if (sep == NULL) | |
2119 | continue; | |
2120 | ||
2121 | *sep = '\0'; | |
2122 | ||
2123 | snprintf(name, sizeof(name), "[%s]", line); | |
aeafcbaf | 2124 | map = machine__new_module(machine, start, name); |
b7cece76 | 2125 | if (map == NULL) |
439d473b | 2126 | goto out_delete_line; |
aeafcbaf | 2127 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
6cfcc53e | 2128 | } |
439d473b ACM |
2129 | |
2130 | free(line); | |
2131 | fclose(file); | |
2132 | ||
aeafcbaf | 2133 | return machine__set_modules_path(machine); |
439d473b ACM |
2134 | |
2135 | out_delete_line: | |
2136 | free(line); | |
2137 | out_failure: | |
2138 | return -1; | |
6cfcc53e MG |
2139 | } |
2140 | ||
aeafcbaf | 2141 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 2142 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 2143 | { |
fbd733b8 | 2144 | int err = -1, fd; |
ec5761ea | 2145 | char symfs_vmlinux[PATH_MAX]; |
a2928c42 | 2146 | |
a639dc64 | 2147 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea DA |
2148 | symbol_conf.symfs, vmlinux); |
2149 | fd = open(symfs_vmlinux, O_RDONLY); | |
a2928c42 ACM |
2150 | if (fd < 0) |
2151 | return -1; | |
2152 | ||
aeafcbaf ACM |
2153 | dso__set_long_name(dso, (char *)vmlinux); |
2154 | dso__set_loaded(dso, map->type); | |
2155 | err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0); | |
a2928c42 ACM |
2156 | close(fd); |
2157 | ||
3846df2e | 2158 | if (err > 0) |
ec5761ea | 2159 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
3846df2e | 2160 | |
a2928c42 ACM |
2161 | return err; |
2162 | } | |
2163 | ||
aeafcbaf | 2164 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 2165 | symbol_filter_t filter) |
a19afe46 ACM |
2166 | { |
2167 | int i, err = 0; | |
5ad90e4e | 2168 | char *filename; |
a19afe46 ACM |
2169 | |
2170 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
2171 | vmlinux_path__nr_entries + 1); |
2172 | ||
aeafcbaf | 2173 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 2174 | if (filename != NULL) { |
aeafcbaf | 2175 | err = dso__load_vmlinux(dso, map, filename, filter); |
5ad90e4e | 2176 | if (err > 0) { |
aeafcbaf | 2177 | dso__set_long_name(dso, filename); |
5ad90e4e ACM |
2178 | goto out; |
2179 | } | |
2180 | free(filename); | |
2181 | } | |
a19afe46 ACM |
2182 | |
2183 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 2184 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 2185 | if (err > 0) { |
aeafcbaf | 2186 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
a19afe46 ACM |
2187 | break; |
2188 | } | |
2189 | } | |
5ad90e4e | 2190 | out: |
a19afe46 ACM |
2191 | return err; |
2192 | } | |
2193 | ||
aeafcbaf | 2194 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 2195 | symbol_filter_t filter) |
a827c875 | 2196 | { |
cc612d81 | 2197 | int err; |
9e201442 ACM |
2198 | const char *kallsyms_filename = NULL; |
2199 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 2200 | /* |
b226a5a7 DA |
2201 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
2202 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
2203 | * |
2204 | * For instance, try to analyse an ARM perf.data file _without_ a | |
2205 | * build-id, or if the user specifies the wrong path to the right | |
2206 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
2207 | * x86_86 one, on the machine where analysis is being performed, say), | |
2208 | * or worse, /proc/kallsyms. | |
2209 | * | |
2210 | * If the specified file _has_ a build-id and there is a build-id | |
2211 | * section in the perf.data file, we will still do the expected | |
2212 | * validation in dso__load_vmlinux and will bail out if they don't | |
2213 | * match. | |
2214 | */ | |
b226a5a7 DA |
2215 | if (symbol_conf.kallsyms_name != NULL) { |
2216 | kallsyms_filename = symbol_conf.kallsyms_name; | |
2217 | goto do_kallsyms; | |
2218 | } | |
2219 | ||
dc8d6ab2 | 2220 | if (symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 2221 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 2222 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 2223 | if (err > 0) { |
aeafcbaf | 2224 | dso__set_long_name(dso, |
e7dadc00 ACM |
2225 | strdup(symbol_conf.vmlinux_name)); |
2226 | goto out_fixup; | |
2227 | } | |
2228 | return err; | |
dc8d6ab2 | 2229 | } |
cc612d81 ACM |
2230 | |
2231 | if (vmlinux_path != NULL) { | |
aeafcbaf | 2232 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 ACM |
2233 | if (err > 0) |
2234 | goto out_fixup; | |
cc612d81 ACM |
2235 | } |
2236 | ||
ec5761ea DA |
2237 | /* do not try local files if a symfs was given */ |
2238 | if (symbol_conf.symfs[0] != 0) | |
2239 | return -1; | |
2240 | ||
b7cece76 ACM |
2241 | /* |
2242 | * Say the kernel DSO was created when processing the build-id header table, | |
2243 | * we have a build-id, so check if it is the same as the running kernel, | |
2244 | * using it if it is. | |
2245 | */ | |
aeafcbaf | 2246 | if (dso->has_build_id) { |
b7cece76 | 2247 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 2248 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
2249 | |
2250 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 2251 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 2252 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 2253 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 2254 | goto do_kallsyms; |
9e201442 | 2255 | } |
8d0591f6 | 2256 | } |
dc8d6ab2 ACM |
2257 | /* |
2258 | * Now look if we have it on the build-id cache in | |
2259 | * $HOME/.debug/[kernel.kallsyms]. | |
2260 | */ | |
aeafcbaf | 2261 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
2262 | sbuild_id); |
2263 | ||
2264 | if (asprintf(&kallsyms_allocated_filename, | |
2265 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
2266 | getenv("HOME"), sbuild_id) == -1) { |
2267 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 2268 | return -1; |
3846df2e | 2269 | } |
dc8d6ab2 | 2270 | |
19fc2ded ACM |
2271 | kallsyms_filename = kallsyms_allocated_filename; |
2272 | ||
dc8d6ab2 | 2273 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
2274 | pr_err("No kallsyms or vmlinux with build-id %s " |
2275 | "was found\n", sbuild_id); | |
9e201442 | 2276 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 2277 | return -1; |
9e201442 | 2278 | } |
dc8d6ab2 ACM |
2279 | } else { |
2280 | /* | |
2281 | * Last resort, if we don't have a build-id and couldn't find | |
2282 | * any vmlinux file, try the running kernel kallsyms table. | |
2283 | */ | |
9e201442 | 2284 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 2285 | } |
439d473b | 2286 | |
cc612d81 | 2287 | do_kallsyms: |
aeafcbaf | 2288 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
2289 | if (err > 0) |
2290 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2291 | free(kallsyms_allocated_filename); |
439d473b ACM |
2292 | |
2293 | if (err > 0) { | |
cc612d81 | 2294 | out_fixup: |
e1c7c6a4 | 2295 | if (kallsyms_filename != NULL) |
aeafcbaf | 2296 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
2297 | map__fixup_start(map); |
2298 | map__fixup_end(map); | |
439d473b | 2299 | } |
94cb9e38 | 2300 | |
a827c875 ACM |
2301 | return err; |
2302 | } | |
2303 | ||
aeafcbaf ACM |
2304 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
2305 | symbol_filter_t filter) | |
a1645ce1 ZY |
2306 | { |
2307 | int err; | |
2308 | const char *kallsyms_filename = NULL; | |
23346f21 | 2309 | struct machine *machine; |
a1645ce1 ZY |
2310 | char path[PATH_MAX]; |
2311 | ||
2312 | if (!map->groups) { | |
2313 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
2314 | return -1; | |
2315 | } | |
23346f21 | 2316 | machine = map->groups->machine; |
a1645ce1 | 2317 | |
23346f21 | 2318 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2319 | /* |
2320 | * if the user specified a vmlinux filename, use it and only | |
2321 | * it, reporting errors to the user if it cannot be used. | |
2322 | * Or use file guest_kallsyms inputted by user on commandline | |
2323 | */ | |
2324 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2325 | err = dso__load_vmlinux(dso, map, |
a1645ce1 ZY |
2326 | symbol_conf.default_guest_vmlinux_name, filter); |
2327 | goto out_try_fixup; | |
2328 | } | |
2329 | ||
2330 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2331 | if (!kallsyms_filename) | |
2332 | return -1; | |
2333 | } else { | |
23346f21 | 2334 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2335 | kallsyms_filename = path; |
2336 | } | |
2337 | ||
aeafcbaf | 2338 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
a1645ce1 ZY |
2339 | if (err > 0) |
2340 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
2341 | ||
2342 | out_try_fixup: | |
2343 | if (err > 0) { | |
2344 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 2345 | machine__mmap_name(machine, path, sizeof(path)); |
aeafcbaf | 2346 | dso__set_long_name(dso, strdup(path)); |
a1645ce1 ZY |
2347 | } |
2348 | map__fixup_start(map); | |
2349 | map__fixup_end(map); | |
2350 | } | |
2351 | ||
2352 | return err; | |
2353 | } | |
cd84c2ac | 2354 | |
b0da954a | 2355 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 2356 | { |
b0da954a | 2357 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
2358 | } |
2359 | ||
b0da954a | 2360 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
2361 | { |
2362 | struct dso *pos; | |
2363 | ||
b0da954a | 2364 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 2365 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
2366 | return pos; |
2367 | return NULL; | |
2368 | } | |
2369 | ||
a89e5abe | 2370 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2371 | { |
a89e5abe | 2372 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2373 | |
e4204992 | 2374 | if (!dso) { |
00a192b3 | 2375 | dso = dso__new(name); |
cfc10d3b | 2376 | if (dso != NULL) { |
a89e5abe | 2377 | dsos__add(head, dso); |
cfc10d3b ACM |
2378 | dso__set_basename(dso); |
2379 | } | |
66bd8424 | 2380 | } |
cd84c2ac FW |
2381 | |
2382 | return dso; | |
cd84c2ac FW |
2383 | } |
2384 | ||
1f626bc3 | 2385 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2386 | { |
2387 | struct dso *pos; | |
cbf69680 | 2388 | size_t ret = 0; |
cd84c2ac | 2389 | |
95011c60 ACM |
2390 | list_for_each_entry(pos, head, node) { |
2391 | int i; | |
2392 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2393 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2394 | } |
cbf69680 ACM |
2395 | |
2396 | return ret; | |
cd84c2ac FW |
2397 | } |
2398 | ||
aeafcbaf | 2399 | size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp) |
b0da954a | 2400 | { |
a1645ce1 | 2401 | struct rb_node *nd; |
cbf69680 | 2402 | size_t ret = 0; |
a1645ce1 | 2403 | |
aeafcbaf | 2404 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2405 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2406 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2407 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2408 | } |
cbf69680 ACM |
2409 | |
2410 | return ret; | |
b0da954a ACM |
2411 | } |
2412 | ||
88d3d9b7 ACM |
2413 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2414 | bool with_hits) | |
9e03eb2d ACM |
2415 | { |
2416 | struct dso *pos; | |
2417 | size_t ret = 0; | |
2418 | ||
b0da954a | 2419 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2420 | if (with_hits && !pos->hit) |
2421 | continue; | |
9e03eb2d | 2422 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2423 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2424 | } |
2425 | return ret; | |
2426 | } | |
2427 | ||
aeafcbaf ACM |
2428 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
2429 | bool with_hits) | |
f869097e | 2430 | { |
aeafcbaf ACM |
2431 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) + |
2432 | __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits); | |
f869097e ACM |
2433 | } |
2434 | ||
aeafcbaf ACM |
2435 | size_t machines__fprintf_dsos_buildid(struct rb_root *machines, |
2436 | FILE *fp, bool with_hits) | |
b0da954a | 2437 | { |
a1645ce1 ZY |
2438 | struct rb_node *nd; |
2439 | size_t ret = 0; | |
2440 | ||
aeafcbaf | 2441 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2442 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2443 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2444 | } |
2445 | return ret; | |
b0da954a ACM |
2446 | } |
2447 | ||
f57b05ed JO |
2448 | static struct dso* |
2449 | dso__kernel_findnew(struct machine *machine, const char *name, | |
2450 | const char *short_name, int dso_type) | |
fd1d908c | 2451 | { |
f57b05ed JO |
2452 | /* |
2453 | * The kernel dso could be created by build_id processing. | |
2454 | */ | |
2455 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
a1645ce1 | 2456 | |
f57b05ed JO |
2457 | /* |
2458 | * We need to run this in all cases, since during the build_id | |
2459 | * processing we had no idea this was the kernel dso. | |
2460 | */ | |
aeafcbaf | 2461 | if (dso != NULL) { |
f57b05ed JO |
2462 | dso__set_short_name(dso, short_name); |
2463 | dso->kernel = dso_type; | |
fd1d908c ACM |
2464 | } |
2465 | ||
aeafcbaf | 2466 | return dso; |
fd1d908c ACM |
2467 | } |
2468 | ||
aeafcbaf | 2469 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
fd1d908c | 2470 | { |
a1645ce1 ZY |
2471 | char path[PATH_MAX]; |
2472 | ||
23346f21 | 2473 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2474 | return; |
23346f21 | 2475 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
aeafcbaf ACM |
2476 | if (sysfs__read_build_id(path, dso->build_id, |
2477 | sizeof(dso->build_id)) == 0) | |
2478 | dso->has_build_id = true; | |
fd1d908c ACM |
2479 | } |
2480 | ||
f57b05ed | 2481 | static struct dso *machine__get_kernel(struct machine *machine) |
cd84c2ac | 2482 | { |
a1645ce1 ZY |
2483 | const char *vmlinux_name = NULL; |
2484 | struct dso *kernel; | |
cd84c2ac | 2485 | |
aeafcbaf | 2486 | if (machine__is_host(machine)) { |
a1645ce1 | 2487 | vmlinux_name = symbol_conf.vmlinux_name; |
f57b05ed JO |
2488 | if (!vmlinux_name) |
2489 | vmlinux_name = "[kernel.kallsyms]"; | |
2490 | ||
2491 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2492 | "[kernel]", | |
2493 | DSO_TYPE_KERNEL); | |
a1645ce1 | 2494 | } else { |
f57b05ed JO |
2495 | char bf[PATH_MAX]; |
2496 | ||
aeafcbaf | 2497 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2498 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
f57b05ed JO |
2499 | if (!vmlinux_name) |
2500 | vmlinux_name = machine__mmap_name(machine, bf, | |
2501 | sizeof(bf)); | |
2502 | ||
2503 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2504 | "[guest.kernel]", | |
2505 | DSO_TYPE_GUEST_KERNEL); | |
8d92c02a | 2506 | } |
cd84c2ac | 2507 | |
f57b05ed | 2508 | if (kernel != NULL && (!kernel->has_build_id)) |
aeafcbaf | 2509 | dso__read_running_kernel_build_id(kernel, machine); |
f57b05ed | 2510 | |
f1dfa0b1 | 2511 | return kernel; |
f1dfa0b1 ACM |
2512 | } |
2513 | ||
d214afbd ML |
2514 | struct process_args { |
2515 | u64 start; | |
2516 | }; | |
2517 | ||
2518 | static int symbol__in_kernel(void *arg, const char *name, | |
3b01a413 | 2519 | char type __used, u64 start, u64 end __used) |
d214afbd ML |
2520 | { |
2521 | struct process_args *args = arg; | |
2522 | ||
2523 | if (strchr(name, '[')) | |
2524 | return 0; | |
2525 | ||
2526 | args->start = start; | |
2527 | return 1; | |
2528 | } | |
2529 | ||
2530 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
2531 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
2532 | { | |
2533 | const char *filename; | |
2534 | char path[PATH_MAX]; | |
2535 | struct process_args args; | |
2536 | ||
2537 | if (machine__is_host(machine)) { | |
2538 | filename = "/proc/kallsyms"; | |
2539 | } else { | |
2540 | if (machine__is_default_guest(machine)) | |
2541 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
2542 | else { | |
2543 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
2544 | filename = path; | |
2545 | } | |
2546 | } | |
2547 | ||
ec80fde7 ACM |
2548 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
2549 | return 0; | |
2550 | ||
d214afbd ML |
2551 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
2552 | return 0; | |
2553 | ||
2554 | return args.start; | |
2555 | } | |
2556 | ||
aeafcbaf | 2557 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
f1dfa0b1 | 2558 | { |
de176489 | 2559 | enum map_type type; |
aeafcbaf | 2560 | u64 start = machine__get_kernel_start_addr(machine); |
f1dfa0b1 | 2561 | |
de176489 | 2562 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2563 | struct kmap *kmap; |
2564 | ||
aeafcbaf ACM |
2565 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
2566 | if (machine->vmlinux_maps[type] == NULL) | |
de176489 | 2567 | return -1; |
f1dfa0b1 | 2568 | |
aeafcbaf ACM |
2569 | machine->vmlinux_maps[type]->map_ip = |
2570 | machine->vmlinux_maps[type]->unmap_ip = | |
2571 | identity__map_ip; | |
2572 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
2573 | kmap->kmaps = &machine->kmaps; | |
2574 | map_groups__insert(&machine->kmaps, | |
2575 | machine->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2576 | } |
2577 | ||
f1dfa0b1 | 2578 | return 0; |
2446042c ACM |
2579 | } |
2580 | ||
aeafcbaf | 2581 | void machine__destroy_kernel_maps(struct machine *machine) |
076c6e45 ACM |
2582 | { |
2583 | enum map_type type; | |
2584 | ||
2585 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2586 | struct kmap *kmap; | |
2587 | ||
aeafcbaf | 2588 | if (machine->vmlinux_maps[type] == NULL) |
076c6e45 ACM |
2589 | continue; |
2590 | ||
aeafcbaf ACM |
2591 | kmap = map__kmap(machine->vmlinux_maps[type]); |
2592 | map_groups__remove(&machine->kmaps, | |
2593 | machine->vmlinux_maps[type]); | |
076c6e45 ACM |
2594 | if (kmap->ref_reloc_sym) { |
2595 | /* | |
2596 | * ref_reloc_sym is shared among all maps, so free just | |
2597 | * on one of them. | |
2598 | */ | |
2599 | if (type == MAP__FUNCTION) { | |
2600 | free((char *)kmap->ref_reloc_sym->name); | |
2601 | kmap->ref_reloc_sym->name = NULL; | |
2602 | free(kmap->ref_reloc_sym); | |
2603 | } | |
2604 | kmap->ref_reloc_sym = NULL; | |
2605 | } | |
2606 | ||
aeafcbaf ACM |
2607 | map__delete(machine->vmlinux_maps[type]); |
2608 | machine->vmlinux_maps[type] = NULL; | |
076c6e45 ACM |
2609 | } |
2610 | } | |
2611 | ||
aeafcbaf | 2612 | int machine__create_kernel_maps(struct machine *machine) |
5c0541d5 | 2613 | { |
f57b05ed | 2614 | struct dso *kernel = machine__get_kernel(machine); |
5c0541d5 ACM |
2615 | |
2616 | if (kernel == NULL || | |
aeafcbaf | 2617 | __machine__create_kernel_maps(machine, kernel) < 0) |
5c0541d5 ACM |
2618 | return -1; |
2619 | ||
f51304d3 DA |
2620 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { |
2621 | if (machine__is_host(machine)) | |
2622 | pr_debug("Problems creating module maps, " | |
2623 | "continuing anyway...\n"); | |
2624 | else | |
2625 | pr_debug("Problems creating module maps for guest %d, " | |
2626 | "continuing anyway...\n", machine->pid); | |
2627 | } | |
2628 | ||
5c0541d5 ACM |
2629 | /* |
2630 | * Now that we have all the maps created, just set the ->end of them: | |
2631 | */ | |
aeafcbaf | 2632 | map_groups__fixup_end(&machine->kmaps); |
5c0541d5 ACM |
2633 | return 0; |
2634 | } | |
2635 | ||
cc612d81 ACM |
2636 | static void vmlinux_path__exit(void) |
2637 | { | |
2638 | while (--vmlinux_path__nr_entries >= 0) { | |
2639 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2640 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2641 | } | |
2642 | ||
2643 | free(vmlinux_path); | |
2644 | vmlinux_path = NULL; | |
2645 | } | |
2646 | ||
2647 | static int vmlinux_path__init(void) | |
2648 | { | |
2649 | struct utsname uts; | |
2650 | char bf[PATH_MAX]; | |
2651 | ||
cc612d81 ACM |
2652 | vmlinux_path = malloc(sizeof(char *) * 5); |
2653 | if (vmlinux_path == NULL) | |
2654 | return -1; | |
2655 | ||
2656 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2657 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2658 | goto out_fail; | |
2659 | ++vmlinux_path__nr_entries; | |
2660 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2661 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2662 | goto out_fail; | |
2663 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
2664 | |
2665 | /* only try running kernel version if no symfs was given */ | |
2666 | if (symbol_conf.symfs[0] != 0) | |
2667 | return 0; | |
2668 | ||
2669 | if (uname(&uts) < 0) | |
2670 | return -1; | |
2671 | ||
cc612d81 ACM |
2672 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
2673 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2674 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2675 | goto out_fail; | |
2676 | ++vmlinux_path__nr_entries; | |
2677 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2678 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2679 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2680 | goto out_fail; | |
2681 | ++vmlinux_path__nr_entries; | |
2682 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2683 | uts.release); | |
2684 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2685 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2686 | goto out_fail; | |
2687 | ++vmlinux_path__nr_entries; | |
2688 | ||
2689 | return 0; | |
2690 | ||
2691 | out_fail: | |
2692 | vmlinux_path__exit(); | |
2693 | return -1; | |
2694 | } | |
2695 | ||
aeafcbaf | 2696 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
b0a9ab62 ACM |
2697 | { |
2698 | int i; | |
2699 | size_t printed = 0; | |
aeafcbaf | 2700 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
5ad90e4e ACM |
2701 | |
2702 | if (kdso->has_build_id) { | |
2703 | char filename[PATH_MAX]; | |
2704 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2705 | printed += fprintf(fp, "[0] %s\n", filename); | |
2706 | } | |
b0a9ab62 ACM |
2707 | |
2708 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2709 | printed += fprintf(fp, "[%d] %s\n", |
2710 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2711 | |
2712 | return printed; | |
2713 | } | |
2714 | ||
655000e7 ACM |
2715 | static int setup_list(struct strlist **list, const char *list_str, |
2716 | const char *list_name) | |
2717 | { | |
2718 | if (list_str == NULL) | |
2719 | return 0; | |
2720 | ||
2721 | *list = strlist__new(true, list_str); | |
2722 | if (!*list) { | |
2723 | pr_err("problems parsing %s list\n", list_name); | |
2724 | return -1; | |
2725 | } | |
2726 | return 0; | |
2727 | } | |
2728 | ||
ec80fde7 ACM |
2729 | static bool symbol__read_kptr_restrict(void) |
2730 | { | |
2731 | bool value = false; | |
2732 | ||
2733 | if (geteuid() != 0) { | |
2734 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
2735 | if (fp != NULL) { | |
2736 | char line[8]; | |
2737 | ||
2738 | if (fgets(line, sizeof(line), fp) != NULL) | |
2739 | value = atoi(line) != 0; | |
2740 | ||
2741 | fclose(fp); | |
2742 | } | |
2743 | } | |
2744 | ||
2745 | return value; | |
2746 | } | |
2747 | ||
75be6cf4 | 2748 | int symbol__init(void) |
2446042c | 2749 | { |
ec5761ea DA |
2750 | const char *symfs; |
2751 | ||
85e00b55 JZ |
2752 | if (symbol_conf.initialized) |
2753 | return 0; | |
2754 | ||
4d439517 DM |
2755 | symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); |
2756 | ||
95011c60 | 2757 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2758 | if (symbol_conf.sort_by_name) |
2759 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2760 | sizeof(struct symbol)); | |
b32d133a | 2761 | |
75be6cf4 | 2762 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2763 | return -1; |
2764 | ||
c410a338 ACM |
2765 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2766 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2767 | return -1; | |
2768 | } | |
2769 | ||
655000e7 ACM |
2770 | if (setup_list(&symbol_conf.dso_list, |
2771 | symbol_conf.dso_list_str, "dso") < 0) | |
2772 | return -1; | |
2773 | ||
2774 | if (setup_list(&symbol_conf.comm_list, | |
2775 | symbol_conf.comm_list_str, "comm") < 0) | |
2776 | goto out_free_dso_list; | |
2777 | ||
2778 | if (setup_list(&symbol_conf.sym_list, | |
2779 | symbol_conf.sym_list_str, "symbol") < 0) | |
2780 | goto out_free_comm_list; | |
2781 | ||
ec5761ea DA |
2782 | /* |
2783 | * A path to symbols of "/" is identical to "" | |
2784 | * reset here for simplicity. | |
2785 | */ | |
2786 | symfs = realpath(symbol_conf.symfs, NULL); | |
2787 | if (symfs == NULL) | |
2788 | symfs = symbol_conf.symfs; | |
2789 | if (strcmp(symfs, "/") == 0) | |
2790 | symbol_conf.symfs = ""; | |
2791 | if (symfs != symbol_conf.symfs) | |
2792 | free((void *)symfs); | |
2793 | ||
ec80fde7 ACM |
2794 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2795 | ||
85e00b55 | 2796 | symbol_conf.initialized = true; |
4aa65636 | 2797 | return 0; |
655000e7 | 2798 | |
655000e7 ACM |
2799 | out_free_comm_list: |
2800 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2801 | out_free_dso_list: |
2802 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2803 | return -1; |
4aa65636 ACM |
2804 | } |
2805 | ||
d65a458b ACM |
2806 | void symbol__exit(void) |
2807 | { | |
85e00b55 JZ |
2808 | if (!symbol_conf.initialized) |
2809 | return; | |
d65a458b ACM |
2810 | strlist__delete(symbol_conf.sym_list); |
2811 | strlist__delete(symbol_conf.dso_list); | |
2812 | strlist__delete(symbol_conf.comm_list); | |
2813 | vmlinux_path__exit(); | |
2814 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2815 | symbol_conf.initialized = false; |
d65a458b ACM |
2816 | } |
2817 | ||
aeafcbaf | 2818 | int machines__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2819 | { |
aeafcbaf | 2820 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2821 | |
23346f21 | 2822 | if (machine == NULL) |
a1645ce1 | 2823 | return -1; |
cc612d81 | 2824 | |
5c0541d5 | 2825 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2826 | } |
5aab621b ACM |
2827 | |
2828 | static int hex(char ch) | |
2829 | { | |
2830 | if ((ch >= '0') && (ch <= '9')) | |
2831 | return ch - '0'; | |
2832 | if ((ch >= 'a') && (ch <= 'f')) | |
2833 | return ch - 'a' + 10; | |
2834 | if ((ch >= 'A') && (ch <= 'F')) | |
2835 | return ch - 'A' + 10; | |
2836 | return -1; | |
2837 | } | |
2838 | ||
2839 | /* | |
2840 | * While we find nice hex chars, build a long_val. | |
2841 | * Return number of chars processed. | |
2842 | */ | |
2843 | int hex2u64(const char *ptr, u64 *long_val) | |
2844 | { | |
2845 | const char *p = ptr; | |
2846 | *long_val = 0; | |
2847 | ||
2848 | while (*p) { | |
2849 | const int hex_val = hex(*p); | |
2850 | ||
2851 | if (hex_val < 0) | |
2852 | break; | |
2853 | ||
2854 | *long_val = (*long_val << 4) | hex_val; | |
2855 | p++; | |
2856 | } | |
2857 | ||
2858 | return p - ptr; | |
2859 | } | |
2860 | ||
2861 | char *strxfrchar(char *s, char from, char to) | |
2862 | { | |
2863 | char *p = s; | |
2864 | ||
2865 | while ((p = strchr(p, from)) != NULL) | |
2866 | *p++ = to; | |
2867 | ||
2868 | return s; | |
2869 | } | |
a1645ce1 | 2870 | |
aeafcbaf | 2871 | int machines__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2872 | { |
2873 | int ret = 0; | |
2874 | struct dirent **namelist = NULL; | |
2875 | int i, items = 0; | |
2876 | char path[PATH_MAX]; | |
2877 | pid_t pid; | |
347ed990 | 2878 | char *endp; |
a1645ce1 ZY |
2879 | |
2880 | if (symbol_conf.default_guest_vmlinux_name || | |
2881 | symbol_conf.default_guest_modules || | |
2882 | symbol_conf.default_guest_kallsyms) { | |
aeafcbaf | 2883 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2884 | } |
2885 | ||
2886 | if (symbol_conf.guestmount) { | |
2887 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2888 | if (items <= 0) | |
2889 | return -ENOENT; | |
2890 | for (i = 0; i < items; i++) { | |
2891 | if (!isdigit(namelist[i]->d_name[0])) { | |
2892 | /* Filter out . and .. */ | |
2893 | continue; | |
2894 | } | |
347ed990 DA |
2895 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); |
2896 | if ((*endp != '\0') || | |
2897 | (endp == namelist[i]->d_name) || | |
2898 | (errno == ERANGE)) { | |
2899 | pr_debug("invalid directory (%s). Skipping.\n", | |
2900 | namelist[i]->d_name); | |
2901 | continue; | |
2902 | } | |
a1645ce1 ZY |
2903 | sprintf(path, "%s/%s/proc/kallsyms", |
2904 | symbol_conf.guestmount, | |
2905 | namelist[i]->d_name); | |
2906 | ret = access(path, R_OK); | |
2907 | if (ret) { | |
2908 | pr_debug("Can't access file %s\n", path); | |
2909 | goto failure; | |
2910 | } | |
aeafcbaf | 2911 | machines__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2912 | } |
2913 | failure: | |
2914 | free(namelist); | |
2915 | } | |
2916 | ||
2917 | return ret; | |
2918 | } | |
5c0541d5 | 2919 | |
aeafcbaf | 2920 | void machines__destroy_guest_kernel_maps(struct rb_root *machines) |
076c6e45 | 2921 | { |
aeafcbaf | 2922 | struct rb_node *next = rb_first(machines); |
076c6e45 ACM |
2923 | |
2924 | while (next) { | |
2925 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2926 | ||
2927 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 2928 | rb_erase(&pos->rb_node, machines); |
076c6e45 ACM |
2929 | machine__delete(pos); |
2930 | } | |
2931 | } | |
2932 | ||
aeafcbaf | 2933 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
5c0541d5 ACM |
2934 | enum map_type type, symbol_filter_t filter) |
2935 | { | |
aeafcbaf | 2936 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2937 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
2938 | ||
2939 | if (ret > 0) { | |
2940 | dso__set_loaded(map->dso, type); | |
2941 | /* | |
2942 | * Since /proc/kallsyms will have multiple sessions for the | |
2943 | * kernel, with modules between them, fixup the end of all | |
2944 | * sections. | |
2945 | */ | |
aeafcbaf | 2946 | __map_groups__fixup_end(&machine->kmaps, type); |
5c0541d5 ACM |
2947 | } |
2948 | ||
2949 | return ret; | |
2950 | } | |
2951 | ||
aeafcbaf | 2952 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
5c0541d5 ACM |
2953 | symbol_filter_t filter) |
2954 | { | |
aeafcbaf | 2955 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2956 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
2957 | ||
2958 | if (ret > 0) { | |
2959 | dso__set_loaded(map->dso, type); | |
2960 | map__reloc_vmlinux(map); | |
2961 | } | |
2962 | ||
2963 | return ret; | |
2964 | } | |
225466f1 SD |
2965 | |
2966 | struct map *dso__new_map(const char *name) | |
2967 | { | |
378474e4 | 2968 | struct map *map = NULL; |
225466f1 | 2969 | struct dso *dso = dso__new(name); |
378474e4 SD |
2970 | |
2971 | if (dso) | |
2972 | map = map__new2(0, dso, MAP__FUNCTION); | |
225466f1 SD |
2973 | |
2974 | return map; | |
2975 | } | |
949d160b JO |
2976 | |
2977 | static int open_dso(struct dso *dso, struct machine *machine) | |
2978 | { | |
2979 | char *root_dir = (char *) ""; | |
2980 | char *name; | |
2981 | int fd; | |
2982 | ||
2983 | name = malloc(PATH_MAX); | |
2984 | if (!name) | |
2985 | return -ENOMEM; | |
2986 | ||
2987 | if (machine) | |
2988 | root_dir = machine->root_dir; | |
2989 | ||
2990 | if (dso__binary_type_file(dso, dso->data_type, | |
2991 | root_dir, name, PATH_MAX)) { | |
2992 | free(name); | |
2993 | return -EINVAL; | |
2994 | } | |
2995 | ||
2996 | fd = open(name, O_RDONLY); | |
2997 | free(name); | |
2998 | return fd; | |
2999 | } | |
3000 | ||
3001 | int dso__data_fd(struct dso *dso, struct machine *machine) | |
3002 | { | |
3003 | int i = 0; | |
3004 | ||
3005 | if (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND) | |
3006 | return open_dso(dso, machine); | |
3007 | ||
3008 | do { | |
3009 | int fd; | |
3010 | ||
3011 | dso->data_type = binary_type_data[i++]; | |
3012 | ||
3013 | fd = open_dso(dso, machine); | |
3014 | if (fd >= 0) | |
3015 | return fd; | |
3016 | ||
3017 | } while (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND); | |
3018 | ||
3019 | return -EINVAL; | |
3020 | } | |
3021 | ||
4dff624a JO |
3022 | static void |
3023 | dso_cache__free(struct rb_root *root) | |
949d160b | 3024 | { |
4dff624a JO |
3025 | struct rb_node *next = rb_first(root); |
3026 | ||
3027 | while (next) { | |
3028 | struct dso_cache *cache; | |
3029 | ||
3030 | cache = rb_entry(next, struct dso_cache, rb_node); | |
3031 | next = rb_next(&cache->rb_node); | |
3032 | rb_erase(&cache->rb_node, root); | |
3033 | free(cache); | |
3034 | } | |
949d160b JO |
3035 | } |
3036 | ||
4dff624a JO |
3037 | static struct dso_cache* |
3038 | dso_cache__find(struct rb_root *root, u64 offset) | |
949d160b | 3039 | { |
4dff624a JO |
3040 | struct rb_node **p = &root->rb_node; |
3041 | struct rb_node *parent = NULL; | |
3042 | struct dso_cache *cache; | |
3043 | ||
3044 | while (*p != NULL) { | |
3045 | u64 end; | |
3046 | ||
3047 | parent = *p; | |
3048 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
3049 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
3050 | ||
3051 | if (offset < cache->offset) | |
3052 | p = &(*p)->rb_left; | |
3053 | else if (offset >= end) | |
3054 | p = &(*p)->rb_right; | |
3055 | else | |
3056 | return cache; | |
3057 | } | |
3058 | return NULL; | |
3059 | } | |
3060 | ||
3061 | static void | |
3062 | dso_cache__insert(struct rb_root *root, struct dso_cache *new) | |
3063 | { | |
3064 | struct rb_node **p = &root->rb_node; | |
3065 | struct rb_node *parent = NULL; | |
3066 | struct dso_cache *cache; | |
3067 | u64 offset = new->offset; | |
3068 | ||
3069 | while (*p != NULL) { | |
3070 | u64 end; | |
3071 | ||
3072 | parent = *p; | |
3073 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
3074 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
3075 | ||
3076 | if (offset < cache->offset) | |
3077 | p = &(*p)->rb_left; | |
3078 | else if (offset >= end) | |
3079 | p = &(*p)->rb_right; | |
3080 | } | |
3081 | ||
3082 | rb_link_node(&new->rb_node, parent, p); | |
3083 | rb_insert_color(&new->rb_node, root); | |
3084 | } | |
3085 | ||
3086 | static ssize_t | |
3087 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
3088 | u8 *data, u64 size) | |
3089 | { | |
3090 | u64 cache_offset = offset - cache->offset; | |
3091 | u64 cache_size = min(cache->size - cache_offset, size); | |
3092 | ||
3093 | memcpy(data, cache->data + cache_offset, cache_size); | |
3094 | return cache_size; | |
949d160b JO |
3095 | } |
3096 | ||
4dff624a JO |
3097 | static ssize_t |
3098 | dso_cache__read(struct dso *dso, struct machine *machine, | |
3099 | u64 offset, u8 *data, ssize_t size) | |
949d160b | 3100 | { |
4dff624a JO |
3101 | struct dso_cache *cache; |
3102 | ssize_t ret; | |
949d160b JO |
3103 | int fd; |
3104 | ||
3105 | fd = dso__data_fd(dso, machine); | |
3106 | if (fd < 0) | |
3107 | return -1; | |
3108 | ||
3109 | do { | |
4dff624a JO |
3110 | u64 cache_offset; |
3111 | ||
3112 | ret = -ENOMEM; | |
3113 | ||
3114 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); | |
3115 | if (!cache) | |
949d160b JO |
3116 | break; |
3117 | ||
4dff624a JO |
3118 | cache_offset = offset & DSO__DATA_CACHE_MASK; |
3119 | ret = -EINVAL; | |
3120 | ||
3121 | if (-1 == lseek(fd, cache_offset, SEEK_SET)) | |
949d160b JO |
3122 | break; |
3123 | ||
4dff624a JO |
3124 | ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE); |
3125 | if (ret <= 0) | |
3126 | break; | |
3127 | ||
3128 | cache->offset = cache_offset; | |
3129 | cache->size = ret; | |
3130 | dso_cache__insert(&dso->cache, cache); | |
3131 | ||
3132 | ret = dso_cache__memcpy(cache, offset, data, size); | |
949d160b JO |
3133 | |
3134 | } while (0); | |
3135 | ||
4dff624a JO |
3136 | if (ret <= 0) |
3137 | free(cache); | |
3138 | ||
949d160b | 3139 | close(fd); |
4dff624a JO |
3140 | return ret; |
3141 | } | |
3142 | ||
3143 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, | |
3144 | u64 offset, u8 *data, ssize_t size) | |
3145 | { | |
3146 | struct dso_cache *cache; | |
3147 | ||
3148 | cache = dso_cache__find(&dso->cache, offset); | |
3149 | if (cache) | |
3150 | return dso_cache__memcpy(cache, offset, data, size); | |
3151 | else | |
3152 | return dso_cache__read(dso, machine, offset, data, size); | |
949d160b JO |
3153 | } |
3154 | ||
3155 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, | |
3156 | u64 offset, u8 *data, ssize_t size) | |
3157 | { | |
4dff624a JO |
3158 | ssize_t r = 0; |
3159 | u8 *p = data; | |
3160 | ||
3161 | do { | |
3162 | ssize_t ret; | |
3163 | ||
3164 | ret = dso_cache_read(dso, machine, offset, p, size); | |
3165 | if (ret < 0) | |
3166 | return ret; | |
3167 | ||
3168 | /* Reached EOF, return what we have. */ | |
3169 | if (!ret) | |
3170 | break; | |
3171 | ||
3172 | BUG_ON(ret > size); | |
3173 | ||
3174 | r += ret; | |
3175 | p += ret; | |
3176 | offset += ret; | |
3177 | size -= ret; | |
3178 | ||
3179 | } while (size); | |
3180 | ||
3181 | return r; | |
949d160b JO |
3182 | } |
3183 | ||
3184 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, | |
3185 | struct machine *machine, u64 addr, | |
3186 | u8 *data, ssize_t size) | |
3187 | { | |
3188 | u64 offset = map->map_ip(map, addr); | |
3189 | return dso__data_read_offset(dso, machine, offset, data, size); | |
3190 | } |