Commit | Line | Data |
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5aab621b ACM |
1 | #include <dirent.h> |
2 | #include <errno.h> | |
5aab621b ACM |
3 | #include <stdlib.h> |
4 | #include <stdio.h> | |
5 | #include <string.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <sys/param.h> | |
9 | #include <fcntl.h> | |
10 | #include <unistd.h> | |
9486aa38 | 11 | #include <inttypes.h> |
b36f19d5 | 12 | #include "build-id.h" |
e334c726 | 13 | #include "util.h" |
8a6c5b26 | 14 | #include "debug.h" |
a2928c42 | 15 | #include "symbol.h" |
5aab621b | 16 | #include "strlist.h" |
a2928c42 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 | ||
aeafcbaf | 32 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id); |
21916c38 | 33 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); |
b0da954a | 34 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 35 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
aeafcbaf | 36 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 37 | symbol_filter_t filter); |
aeafcbaf | 38 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 39 | symbol_filter_t filter); |
cc612d81 ACM |
40 | static int vmlinux_path__nr_entries; |
41 | static char **vmlinux_path; | |
439d473b | 42 | |
75be6cf4 | 43 | struct symbol_conf symbol_conf = { |
d599db3f | 44 | .exclude_other = true, |
b32d133a ACM |
45 | .use_modules = true, |
46 | .try_vmlinux_path = true, | |
3e6a2a7f | 47 | .annotate_src = true, |
ec5761ea | 48 | .symfs = "", |
b32d133a ACM |
49 | }; |
50 | ||
aeafcbaf | 51 | int dso__name_len(const struct dso *dso) |
8a6c5b26 | 52 | { |
1e2dd2f7 DM |
53 | if (!dso) |
54 | return strlen("[unknown]"); | |
8a6c5b26 | 55 | if (verbose) |
aeafcbaf | 56 | return dso->long_name_len; |
8a6c5b26 | 57 | |
aeafcbaf | 58 | return dso->short_name_len; |
8a6c5b26 ACM |
59 | } |
60 | ||
aeafcbaf | 61 | bool dso__loaded(const struct dso *dso, enum map_type type) |
3610583c | 62 | { |
aeafcbaf | 63 | return dso->loaded & (1 << type); |
3610583c ACM |
64 | } |
65 | ||
aeafcbaf | 66 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) |
79406cd7 | 67 | { |
aeafcbaf | 68 | return dso->sorted_by_name & (1 << type); |
79406cd7 ACM |
69 | } |
70 | ||
aeafcbaf | 71 | static void dso__set_sorted_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 72 | { |
aeafcbaf | 73 | dso->sorted_by_name |= (1 << type); |
79406cd7 ACM |
74 | } |
75 | ||
36a3e646 | 76 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee | 77 | { |
31877908 AB |
78 | symbol_type = toupper(symbol_type); |
79 | ||
6893d4ee ACM |
80 | switch (map_type) { |
81 | case MAP__FUNCTION: | |
82 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 | 83 | case MAP__VARIABLE: |
31877908 | 84 | return symbol_type == 'D'; |
6893d4ee ACM |
85 | default: |
86 | return false; | |
87 | } | |
88 | } | |
89 | ||
694bf407 AB |
90 | static int prefix_underscores_count(const char *str) |
91 | { | |
92 | const char *tail = str; | |
93 | ||
94 | while (*tail == '_') | |
95 | tail++; | |
96 | ||
97 | return tail - str; | |
98 | } | |
99 | ||
100 | #define SYMBOL_A 0 | |
101 | #define SYMBOL_B 1 | |
102 | ||
103 | static int choose_best_symbol(struct symbol *syma, struct symbol *symb) | |
104 | { | |
105 | s64 a; | |
106 | s64 b; | |
107 | ||
108 | /* Prefer a symbol with non zero length */ | |
109 | a = syma->end - syma->start; | |
110 | b = symb->end - symb->start; | |
111 | if ((b == 0) && (a > 0)) | |
112 | return SYMBOL_A; | |
113 | else if ((a == 0) && (b > 0)) | |
114 | return SYMBOL_B; | |
115 | ||
116 | /* Prefer a non weak symbol over a weak one */ | |
117 | a = syma->binding == STB_WEAK; | |
118 | b = symb->binding == STB_WEAK; | |
119 | if (b && !a) | |
120 | return SYMBOL_A; | |
121 | if (a && !b) | |
122 | return SYMBOL_B; | |
123 | ||
124 | /* Prefer a global symbol over a non global one */ | |
125 | a = syma->binding == STB_GLOBAL; | |
126 | b = symb->binding == STB_GLOBAL; | |
127 | if (a && !b) | |
128 | return SYMBOL_A; | |
129 | if (b && !a) | |
130 | return SYMBOL_B; | |
131 | ||
132 | /* Prefer a symbol with less underscores */ | |
133 | a = prefix_underscores_count(syma->name); | |
134 | b = prefix_underscores_count(symb->name); | |
135 | if (b > a) | |
136 | return SYMBOL_A; | |
137 | else if (a > b) | |
138 | return SYMBOL_B; | |
139 | ||
140 | /* If all else fails, choose the symbol with the longest name */ | |
141 | if (strlen(syma->name) >= strlen(symb->name)) | |
142 | return SYMBOL_A; | |
143 | else | |
144 | return SYMBOL_B; | |
145 | } | |
146 | ||
147 | static void symbols__fixup_duplicate(struct rb_root *symbols) | |
148 | { | |
149 | struct rb_node *nd; | |
150 | struct symbol *curr, *next; | |
151 | ||
152 | nd = rb_first(symbols); | |
153 | ||
154 | while (nd) { | |
155 | curr = rb_entry(nd, struct symbol, rb_node); | |
156 | again: | |
157 | nd = rb_next(&curr->rb_node); | |
158 | next = rb_entry(nd, struct symbol, rb_node); | |
159 | ||
160 | if (!nd) | |
161 | break; | |
162 | ||
163 | if (curr->start != next->start) | |
164 | continue; | |
165 | ||
166 | if (choose_best_symbol(curr, next) == SYMBOL_A) { | |
167 | rb_erase(&next->rb_node, symbols); | |
168 | goto again; | |
169 | } else { | |
170 | nd = rb_next(&curr->rb_node); | |
171 | rb_erase(&curr->rb_node, symbols); | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
aeafcbaf | 176 | static void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 177 | { |
aeafcbaf | 178 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 179 | struct symbol *curr, *prev; |
af427bf5 ACM |
180 | |
181 | if (prevnd == NULL) | |
182 | return; | |
183 | ||
2e538c4a ACM |
184 | curr = rb_entry(prevnd, struct symbol, rb_node); |
185 | ||
af427bf5 | 186 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
187 | prev = curr; |
188 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 189 | |
3b01a413 | 190 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 191 | prev->end = curr->start - 1; |
af427bf5 | 192 | } |
2e538c4a ACM |
193 | |
194 | /* Last entry */ | |
195 | if (curr->end == curr->start) | |
196 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
197 | } |
198 | ||
aeafcbaf | 199 | static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
200 | { |
201 | struct map *prev, *curr; | |
aeafcbaf | 202 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
203 | |
204 | if (prevnd == NULL) | |
205 | return; | |
206 | ||
207 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
208 | |
209 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
210 | prev = curr; | |
211 | curr = rb_entry(nd, struct map, rb_node); | |
212 | prev->end = curr->start - 1; | |
2e538c4a | 213 | } |
90c83218 ACM |
214 | |
215 | /* | |
216 | * We still haven't the actual symbols, so guess the | |
217 | * last map final address. | |
218 | */ | |
9d1faba5 | 219 | curr->end = ~0ULL; |
af427bf5 ACM |
220 | } |
221 | ||
aeafcbaf | 222 | static void map_groups__fixup_end(struct map_groups *mg) |
23ea4a3f ACM |
223 | { |
224 | int i; | |
225 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf | 226 | __map_groups__fixup_end(mg, i); |
23ea4a3f ACM |
227 | } |
228 | ||
c408fedf ACM |
229 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
230 | const char *name) | |
a2928c42 | 231 | { |
0085c954 | 232 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
233 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
234 | sizeof(*sym) + namelen)); | |
235 | if (sym == NULL) | |
0b73da3f IM |
236 | return NULL; |
237 | ||
75be6cf4 | 238 | if (symbol_conf.priv_size) |
aeafcbaf | 239 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 240 | |
aeafcbaf ACM |
241 | sym->start = start; |
242 | sym->end = len ? start + len - 1 : start; | |
243 | sym->binding = binding; | |
244 | sym->namelen = namelen - 1; | |
e4204992 | 245 | |
aeafcbaf ACM |
246 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
247 | __func__, name, start, sym->end); | |
248 | memcpy(sym->name, name, namelen); | |
a2928c42 | 249 | |
aeafcbaf | 250 | return sym; |
a2928c42 ACM |
251 | } |
252 | ||
aeafcbaf | 253 | void symbol__delete(struct symbol *sym) |
a2928c42 | 254 | { |
aeafcbaf | 255 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
256 | } |
257 | ||
aeafcbaf | 258 | static size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 259 | { |
9486aa38 | 260 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
261 | sym->start, sym->end, |
262 | sym->binding == STB_GLOBAL ? 'g' : | |
263 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
264 | sym->name); | |
a2928c42 ACM |
265 | } |
266 | ||
a978f2ab AN |
267 | size_t symbol__fprintf_symname_offs(const struct symbol *sym, |
268 | const struct addr_location *al, FILE *fp) | |
547a92e0 | 269 | { |
a978f2ab AN |
270 | unsigned long offset; |
271 | size_t length; | |
272 | ||
273 | if (sym && sym->name) { | |
274 | length = fprintf(fp, "%s", sym->name); | |
275 | if (al) { | |
276 | offset = al->addr - sym->start; | |
277 | length += fprintf(fp, "+0x%lx", offset); | |
278 | } | |
279 | return length; | |
280 | } else | |
281 | return fprintf(fp, "[unknown]"); | |
282 | } | |
547a92e0 | 283 | |
a978f2ab AN |
284 | size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) |
285 | { | |
286 | return symbol__fprintf_symname_offs(sym, NULL, fp); | |
547a92e0 AN |
287 | } |
288 | ||
aeafcbaf | 289 | void dso__set_long_name(struct dso *dso, char *name) |
cfc10d3b | 290 | { |
ef6ae724 ACM |
291 | if (name == NULL) |
292 | return; | |
aeafcbaf ACM |
293 | dso->long_name = name; |
294 | dso->long_name_len = strlen(name); | |
cfc10d3b ACM |
295 | } |
296 | ||
aeafcbaf | 297 | static void dso__set_short_name(struct dso *dso, const char *name) |
b63be8d7 ACM |
298 | { |
299 | if (name == NULL) | |
300 | return; | |
aeafcbaf ACM |
301 | dso->short_name = name; |
302 | dso->short_name_len = strlen(name); | |
b63be8d7 ACM |
303 | } |
304 | ||
aeafcbaf | 305 | static void dso__set_basename(struct dso *dso) |
cfc10d3b | 306 | { |
aeafcbaf | 307 | dso__set_short_name(dso, basename(dso->long_name)); |
cfc10d3b ACM |
308 | } |
309 | ||
00a192b3 | 310 | struct dso *dso__new(const char *name) |
a2928c42 | 311 | { |
aeafcbaf | 312 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
a2928c42 | 313 | |
aeafcbaf | 314 | if (dso != NULL) { |
6a4694a4 | 315 | int i; |
aeafcbaf ACM |
316 | strcpy(dso->name, name); |
317 | dso__set_long_name(dso, dso->name); | |
318 | dso__set_short_name(dso, dso->name); | |
6a4694a4 | 319 | for (i = 0; i < MAP__NR_TYPES; ++i) |
aeafcbaf ACM |
320 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; |
321 | dso->symtab_type = SYMTAB__NOT_FOUND; | |
322 | dso->loaded = 0; | |
323 | dso->sorted_by_name = 0; | |
324 | dso->has_build_id = 0; | |
325 | dso->kernel = DSO_TYPE_USER; | |
8db4841f | 326 | dso->needs_swap = DSO_SWAP__UNSET; |
aeafcbaf | 327 | INIT_LIST_HEAD(&dso->node); |
a2928c42 ACM |
328 | } |
329 | ||
aeafcbaf | 330 | return dso; |
a2928c42 ACM |
331 | } |
332 | ||
aeafcbaf | 333 | static void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
334 | { |
335 | struct symbol *pos; | |
aeafcbaf | 336 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
337 | |
338 | while (next) { | |
339 | pos = rb_entry(next, struct symbol, rb_node); | |
340 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 341 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 342 | symbol__delete(pos); |
a2928c42 ACM |
343 | } |
344 | } | |
345 | ||
aeafcbaf | 346 | void dso__delete(struct dso *dso) |
a2928c42 | 347 | { |
6a4694a4 ACM |
348 | int i; |
349 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf ACM |
350 | symbols__delete(&dso->symbols[i]); |
351 | if (dso->sname_alloc) | |
352 | free((char *)dso->short_name); | |
353 | if (dso->lname_alloc) | |
354 | free(dso->long_name); | |
355 | free(dso); | |
a2928c42 ACM |
356 | } |
357 | ||
aeafcbaf | 358 | void dso__set_build_id(struct dso *dso, void *build_id) |
8d06367f | 359 | { |
aeafcbaf ACM |
360 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); |
361 | dso->has_build_id = 1; | |
8d06367f ACM |
362 | } |
363 | ||
aeafcbaf | 364 | static void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 365 | { |
aeafcbaf | 366 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 367 | struct rb_node *parent = NULL; |
9cffa8d5 | 368 | const u64 ip = sym->start; |
a2928c42 ACM |
369 | struct symbol *s; |
370 | ||
371 | while (*p != NULL) { | |
372 | parent = *p; | |
373 | s = rb_entry(parent, struct symbol, rb_node); | |
374 | if (ip < s->start) | |
375 | p = &(*p)->rb_left; | |
376 | else | |
377 | p = &(*p)->rb_right; | |
378 | } | |
379 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 380 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
381 | } |
382 | ||
aeafcbaf | 383 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
384 | { |
385 | struct rb_node *n; | |
386 | ||
aeafcbaf | 387 | if (symbols == NULL) |
a2928c42 ACM |
388 | return NULL; |
389 | ||
aeafcbaf | 390 | n = symbols->rb_node; |
a2928c42 ACM |
391 | |
392 | while (n) { | |
393 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
394 | ||
395 | if (ip < s->start) | |
396 | n = n->rb_left; | |
397 | else if (ip > s->end) | |
398 | n = n->rb_right; | |
399 | else | |
400 | return s; | |
401 | } | |
402 | ||
403 | return NULL; | |
404 | } | |
405 | ||
79406cd7 ACM |
406 | struct symbol_name_rb_node { |
407 | struct rb_node rb_node; | |
408 | struct symbol sym; | |
409 | }; | |
410 | ||
aeafcbaf | 411 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 412 | { |
aeafcbaf | 413 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 414 | struct rb_node *parent = NULL; |
02a9d037 RV |
415 | struct symbol_name_rb_node *symn, *s; |
416 | ||
417 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
418 | |
419 | while (*p != NULL) { | |
420 | parent = *p; | |
421 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
422 | if (strcmp(sym->name, s->sym.name) < 0) | |
423 | p = &(*p)->rb_left; | |
424 | else | |
425 | p = &(*p)->rb_right; | |
426 | } | |
427 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 428 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
429 | } |
430 | ||
aeafcbaf ACM |
431 | static void symbols__sort_by_name(struct rb_root *symbols, |
432 | struct rb_root *source) | |
79406cd7 ACM |
433 | { |
434 | struct rb_node *nd; | |
435 | ||
436 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
437 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 438 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
439 | } |
440 | } | |
441 | ||
aeafcbaf ACM |
442 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
443 | const char *name) | |
79406cd7 ACM |
444 | { |
445 | struct rb_node *n; | |
446 | ||
aeafcbaf | 447 | if (symbols == NULL) |
79406cd7 ACM |
448 | return NULL; |
449 | ||
aeafcbaf | 450 | n = symbols->rb_node; |
79406cd7 ACM |
451 | |
452 | while (n) { | |
453 | struct symbol_name_rb_node *s; | |
454 | int cmp; | |
455 | ||
456 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
457 | cmp = strcmp(name, s->sym.name); | |
458 | ||
459 | if (cmp < 0) | |
460 | n = n->rb_left; | |
461 | else if (cmp > 0) | |
462 | n = n->rb_right; | |
463 | else | |
464 | return &s->sym; | |
465 | } | |
466 | ||
467 | return NULL; | |
468 | } | |
469 | ||
aeafcbaf | 470 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 471 | enum map_type type, u64 addr) |
fcf1203a | 472 | { |
aeafcbaf | 473 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
474 | } |
475 | ||
aeafcbaf | 476 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
477 | const char *name) |
478 | { | |
aeafcbaf | 479 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
480 | } |
481 | ||
aeafcbaf | 482 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 483 | { |
aeafcbaf ACM |
484 | dso__set_sorted_by_name(dso, type); |
485 | return symbols__sort_by_name(&dso->symbol_names[type], | |
486 | &dso->symbols[type]); | |
79406cd7 ACM |
487 | } |
488 | ||
aeafcbaf | 489 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
a2928c42 | 490 | { |
8d06367f | 491 | char *bid = bf; |
aeafcbaf | 492 | const u8 *raw = build_id; |
8d06367f | 493 | int i; |
a2928c42 | 494 | |
8d06367f ACM |
495 | for (i = 0; i < len; ++i) { |
496 | sprintf(bid, "%02x", *raw); | |
497 | ++raw; | |
498 | bid += 2; | |
499 | } | |
500 | ||
aeafcbaf | 501 | return raw - build_id; |
8d06367f ACM |
502 | } |
503 | ||
aeafcbaf | 504 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
8d06367f ACM |
505 | { |
506 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f | 507 | |
aeafcbaf | 508 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
9e03eb2d ACM |
509 | return fprintf(fp, "%s", sbuild_id); |
510 | } | |
511 | ||
aeafcbaf ACM |
512 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
513 | enum map_type type, FILE *fp) | |
90f18e63 SD |
514 | { |
515 | size_t ret = 0; | |
516 | struct rb_node *nd; | |
517 | struct symbol_name_rb_node *pos; | |
518 | ||
aeafcbaf | 519 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
520 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
521 | fprintf(fp, "%s\n", pos->sym.name); | |
522 | } | |
523 | ||
524 | return ret; | |
525 | } | |
526 | ||
aeafcbaf | 527 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) |
9e03eb2d ACM |
528 | { |
529 | struct rb_node *nd; | |
aeafcbaf | 530 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); |
9e03eb2d | 531 | |
aeafcbaf ACM |
532 | if (dso->short_name != dso->long_name) |
533 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3846df2e | 534 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], |
aeafcbaf ACM |
535 | dso->loaded ? "" : "NOT "); |
536 | ret += dso__fprintf_buildid(dso, fp); | |
6a4694a4 | 537 | ret += fprintf(fp, ")\n"); |
aeafcbaf | 538 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { |
95011c60 ACM |
539 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
540 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
541 | } |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
9e201442 ACM |
546 | int kallsyms__parse(const char *filename, void *arg, |
547 | int (*process_symbol)(void *arg, const char *name, | |
3b01a413 | 548 | char type, u64 start, u64 end)) |
a2928c42 | 549 | { |
a2928c42 ACM |
550 | char *line = NULL; |
551 | size_t n; | |
3b01a413 | 552 | int err = -1; |
9e201442 | 553 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
554 | |
555 | if (file == NULL) | |
556 | goto out_failure; | |
557 | ||
3b01a413 ACM |
558 | err = 0; |
559 | ||
a2928c42 | 560 | while (!feof(file)) { |
9cffa8d5 | 561 | u64 start; |
a2928c42 ACM |
562 | int line_len, len; |
563 | char symbol_type; | |
2e538c4a | 564 | char *symbol_name; |
a2928c42 ACM |
565 | |
566 | line_len = getline(&line, &n, file); | |
a1645ce1 | 567 | if (line_len < 0 || !line) |
a2928c42 ACM |
568 | break; |
569 | ||
a2928c42 ACM |
570 | line[--line_len] = '\0'; /* \n */ |
571 | ||
a0055ae2 | 572 | len = hex2u64(line, &start); |
a2928c42 ACM |
573 | |
574 | len++; | |
575 | if (len + 2 >= line_len) | |
576 | continue; | |
577 | ||
31877908 | 578 | symbol_type = line[len]; |
3b01a413 ACM |
579 | len += 2; |
580 | symbol_name = line + len; | |
581 | len = line_len - len; | |
682b335a | 582 | |
3b01a413 ACM |
583 | if (len >= KSYM_NAME_LEN) { |
584 | err = -1; | |
682b335a | 585 | break; |
3b01a413 ACM |
586 | } |
587 | ||
3f5a4272 AB |
588 | /* |
589 | * module symbols are not sorted so we add all | |
590 | * symbols with zero length and rely on | |
591 | * symbols__fixup_end() to fix it up. | |
592 | */ | |
593 | err = process_symbol(arg, symbol_name, | |
594 | symbol_type, start, start); | |
595 | if (err) | |
596 | break; | |
2e538c4a ACM |
597 | } |
598 | ||
599 | free(line); | |
600 | fclose(file); | |
682b335a | 601 | return err; |
2e538c4a | 602 | |
2e538c4a ACM |
603 | out_failure: |
604 | return -1; | |
605 | } | |
606 | ||
682b335a ACM |
607 | struct process_kallsyms_args { |
608 | struct map *map; | |
609 | struct dso *dso; | |
610 | }; | |
611 | ||
c408fedf ACM |
612 | static u8 kallsyms2elf_type(char type) |
613 | { | |
614 | if (type == 'W') | |
615 | return STB_WEAK; | |
616 | ||
617 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
618 | } | |
619 | ||
682b335a | 620 | static int map__process_kallsym_symbol(void *arg, const char *name, |
3b01a413 | 621 | char type, u64 start, u64 end) |
682b335a ACM |
622 | { |
623 | struct symbol *sym; | |
624 | struct process_kallsyms_args *a = arg; | |
625 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
626 | ||
627 | if (!symbol_type__is_a(type, a->map->type)) | |
628 | return 0; | |
629 | ||
3b01a413 ACM |
630 | sym = symbol__new(start, end - start + 1, |
631 | kallsyms2elf_type(type), name); | |
682b335a ACM |
632 | if (sym == NULL) |
633 | return -ENOMEM; | |
634 | /* | |
635 | * We will pass the symbols to the filter later, in | |
636 | * map__split_kallsyms, when we have split the maps per module | |
637 | */ | |
638 | symbols__insert(root, sym); | |
a1645ce1 | 639 | |
682b335a ACM |
640 | return 0; |
641 | } | |
642 | ||
643 | /* | |
644 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
645 | * so that we can in the next step set the symbol ->end address and then | |
646 | * call kernel_maps__split_kallsyms. | |
647 | */ | |
aeafcbaf | 648 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 649 | struct map *map) |
682b335a | 650 | { |
aeafcbaf | 651 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 652 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
653 | } |
654 | ||
2e538c4a ACM |
655 | /* |
656 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
657 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
658 | * the original ELF section names vmlinux have. | |
659 | */ | |
aeafcbaf | 660 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 661 | symbol_filter_t filter) |
2e538c4a | 662 | { |
9de89fe7 | 663 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 664 | struct machine *machine = kmaps->machine; |
4e06255f | 665 | struct map *curr_map = map; |
2e538c4a | 666 | struct symbol *pos; |
8a953312 | 667 | int count = 0, moved = 0; |
aeafcbaf | 668 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 669 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
670 | int kernel_range = 0; |
671 | ||
672 | while (next) { | |
673 | char *module; | |
674 | ||
675 | pos = rb_entry(next, struct symbol, rb_node); | |
676 | next = rb_next(&pos->rb_node); | |
677 | ||
678 | module = strchr(pos->name, '\t'); | |
679 | if (module) { | |
75be6cf4 | 680 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
681 | goto discard_symbol; |
682 | ||
2e538c4a ACM |
683 | *module++ = '\0'; |
684 | ||
b7cece76 | 685 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 686 | if (curr_map != map && |
aeafcbaf | 687 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 688 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
689 | /* |
690 | * We assume all symbols of a module are | |
691 | * continuous in * kallsyms, so curr_map | |
692 | * points to a module and all its | |
693 | * symbols are in its kmap. Mark it as | |
694 | * loaded. | |
695 | */ | |
696 | dso__set_loaded(curr_map->dso, | |
697 | curr_map->type); | |
698 | } | |
699 | ||
700 | curr_map = map_groups__find_by_name(kmaps, | |
701 | map->type, module); | |
4e06255f | 702 | if (curr_map == NULL) { |
2f51903b | 703 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 704 | "inconsistency while looking " |
a1645ce1 | 705 | "for \"%s\" module!\n", |
23346f21 | 706 | machine->root_dir, module); |
a1645ce1 ZY |
707 | curr_map = map; |
708 | goto discard_symbol; | |
af427bf5 | 709 | } |
b7cece76 | 710 | |
a1645ce1 | 711 | if (curr_map->dso->loaded && |
23346f21 | 712 | !machine__is_default_guest(machine)) |
b7cece76 | 713 | goto discard_symbol; |
af427bf5 | 714 | } |
2e538c4a ACM |
715 | /* |
716 | * So that we look just like we get from .ko files, | |
717 | * i.e. not prelinked, relative to map->start. | |
718 | */ | |
4e06255f ACM |
719 | pos->start = curr_map->map_ip(curr_map, pos->start); |
720 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
721 | } else if (curr_map != map) { | |
2e538c4a | 722 | char dso_name[PATH_MAX]; |
aeafcbaf | 723 | struct dso *ndso; |
2e538c4a | 724 | |
8a953312 ACM |
725 | if (count == 0) { |
726 | curr_map = map; | |
727 | goto filter_symbol; | |
728 | } | |
729 | ||
aeafcbaf | 730 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
731 | snprintf(dso_name, sizeof(dso_name), |
732 | "[guest.kernel].%d", | |
733 | kernel_range++); | |
734 | else | |
735 | snprintf(dso_name, sizeof(dso_name), | |
736 | "[kernel].%d", | |
737 | kernel_range++); | |
2e538c4a | 738 | |
aeafcbaf ACM |
739 | ndso = dso__new(dso_name); |
740 | if (ndso == NULL) | |
2e538c4a ACM |
741 | return -1; |
742 | ||
aeafcbaf | 743 | ndso->kernel = dso->kernel; |
a1645ce1 | 744 | |
aeafcbaf | 745 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 746 | if (curr_map == NULL) { |
aeafcbaf | 747 | dso__delete(ndso); |
2e538c4a ACM |
748 | return -1; |
749 | } | |
a2928c42 | 750 | |
4e06255f | 751 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 752 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
753 | ++kernel_range; |
754 | } | |
8a953312 | 755 | filter_symbol: |
4e06255f | 756 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 757 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 758 | symbol__delete(pos); |
2e538c4a | 759 | } else { |
4e06255f ACM |
760 | if (curr_map != map) { |
761 | rb_erase(&pos->rb_node, root); | |
762 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
763 | ++moved; |
764 | } else | |
765 | ++count; | |
9974f496 | 766 | } |
a2928c42 ACM |
767 | } |
768 | ||
a1645ce1 | 769 | if (curr_map != map && |
aeafcbaf | 770 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 771 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
772 | dso__set_loaded(curr_map->dso, curr_map->type); |
773 | } | |
774 | ||
8a953312 | 775 | return count + moved; |
2e538c4a | 776 | } |
a2928c42 | 777 | |
ec80fde7 ACM |
778 | static bool symbol__restricted_filename(const char *filename, |
779 | const char *restricted_filename) | |
780 | { | |
781 | bool restricted = false; | |
782 | ||
783 | if (symbol_conf.kptr_restrict) { | |
784 | char *r = realpath(filename, NULL); | |
785 | ||
786 | if (r != NULL) { | |
787 | restricted = strcmp(r, restricted_filename) == 0; | |
788 | free(r); | |
789 | return restricted; | |
790 | } | |
791 | } | |
792 | ||
793 | return restricted; | |
794 | } | |
795 | ||
aeafcbaf | 796 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 797 | struct map *map, symbol_filter_t filter) |
2e538c4a | 798 | { |
ec80fde7 ACM |
799 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
800 | return -1; | |
801 | ||
aeafcbaf | 802 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
803 | return -1; |
804 | ||
694bf407 | 805 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
3f5a4272 AB |
806 | symbols__fixup_end(&dso->symbols[map->type]); |
807 | ||
aeafcbaf ACM |
808 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
809 | dso->symtab_type = SYMTAB__GUEST_KALLSYMS; | |
a1645ce1 | 810 | else |
aeafcbaf | 811 | dso->symtab_type = SYMTAB__KALLSYMS; |
2e538c4a | 812 | |
aeafcbaf | 813 | return dso__split_kallsyms(dso, map, filter); |
af427bf5 ACM |
814 | } |
815 | ||
aeafcbaf | 816 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 817 | symbol_filter_t filter) |
80d496be PE |
818 | { |
819 | char *line = NULL; | |
820 | size_t n; | |
821 | FILE *file; | |
822 | int nr_syms = 0; | |
823 | ||
aeafcbaf | 824 | file = fopen(dso->long_name, "r"); |
80d496be PE |
825 | if (file == NULL) |
826 | goto out_failure; | |
827 | ||
828 | while (!feof(file)) { | |
9cffa8d5 | 829 | u64 start, size; |
80d496be PE |
830 | struct symbol *sym; |
831 | int line_len, len; | |
832 | ||
833 | line_len = getline(&line, &n, file); | |
834 | if (line_len < 0) | |
835 | break; | |
836 | ||
837 | if (!line) | |
838 | goto out_failure; | |
839 | ||
840 | line[--line_len] = '\0'; /* \n */ | |
841 | ||
842 | len = hex2u64(line, &start); | |
843 | ||
844 | len++; | |
845 | if (len + 2 >= line_len) | |
846 | continue; | |
847 | ||
848 | len += hex2u64(line + len, &size); | |
849 | ||
850 | len++; | |
851 | if (len + 2 >= line_len) | |
852 | continue; | |
853 | ||
c408fedf | 854 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
855 | |
856 | if (sym == NULL) | |
857 | goto out_delete_line; | |
858 | ||
439d473b | 859 | if (filter && filter(map, sym)) |
00a192b3 | 860 | symbol__delete(sym); |
80d496be | 861 | else { |
aeafcbaf | 862 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
863 | nr_syms++; |
864 | } | |
865 | } | |
866 | ||
867 | free(line); | |
868 | fclose(file); | |
869 | ||
870 | return nr_syms; | |
871 | ||
872 | out_delete_line: | |
873 | free(line); | |
874 | out_failure: | |
875 | return -1; | |
876 | } | |
877 | ||
a2928c42 ACM |
878 | /** |
879 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
880 | * | |
aeafcbaf | 881 | * @syms: struct elf_symtab instance to iterate |
83a0944f | 882 | * @idx: uint32_t idx |
a2928c42 ACM |
883 | * @sym: GElf_Sym iterator |
884 | */ | |
83a0944f IM |
885 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
886 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
887 | idx < nr_syms; \ | |
888 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
889 | |
890 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
891 | { | |
892 | return GELF_ST_TYPE(sym->st_info); | |
893 | } | |
894 | ||
895 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
896 | { | |
897 | return elf_sym__type(sym) == STT_FUNC && | |
898 | sym->st_name != 0 && | |
81833130 | 899 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
900 | } |
901 | ||
f1dfa0b1 ACM |
902 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
903 | { | |
904 | return elf_sym__type(sym) == STT_OBJECT && | |
905 | sym->st_name != 0 && | |
906 | sym->st_shndx != SHN_UNDEF; | |
907 | } | |
908 | ||
6cfcc53e MG |
909 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
910 | { | |
911 | return elf_sym__type(sym) == STT_NOTYPE && | |
912 | sym->st_name != 0 && | |
913 | sym->st_shndx != SHN_UNDEF && | |
914 | sym->st_shndx != SHN_ABS; | |
915 | } | |
916 | ||
917 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
918 | const Elf_Data *secstrs) | |
919 | { | |
920 | return secstrs->d_buf + shdr->sh_name; | |
921 | } | |
922 | ||
923 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
924 | const Elf_Data *secstrs) | |
925 | { | |
926 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
927 | } | |
928 | ||
f1dfa0b1 ACM |
929 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
930 | const Elf_Data *secstrs) | |
931 | { | |
932 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
933 | } | |
934 | ||
a2928c42 ACM |
935 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
936 | const Elf_Data *symstrs) | |
937 | { | |
938 | return symstrs->d_buf + sym->st_name; | |
939 | } | |
940 | ||
941 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
942 | GElf_Shdr *shp, const char *name, | |
83a0944f | 943 | size_t *idx) |
a2928c42 ACM |
944 | { |
945 | Elf_Scn *sec = NULL; | |
946 | size_t cnt = 1; | |
947 | ||
948 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
949 | char *str; | |
950 | ||
951 | gelf_getshdr(sec, shp); | |
952 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
953 | if (!strcmp(name, str)) { | |
83a0944f IM |
954 | if (idx) |
955 | *idx = cnt; | |
a2928c42 ACM |
956 | break; |
957 | } | |
958 | ++cnt; | |
959 | } | |
960 | ||
961 | return sec; | |
962 | } | |
963 | ||
8ce998d6 ACM |
964 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
965 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
966 | idx < nr_entries; \ | |
967 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
968 | ||
969 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
970 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
971 | idx < nr_entries; \ | |
972 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
973 | ||
a25e46c4 ACM |
974 | /* |
975 | * We need to check if we have a .dynsym, so that we can handle the | |
976 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
977 | * .dynsym or .symtab). | |
978 | * And always look at the original dso, not at debuginfo packages, that | |
979 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
980 | */ | |
33ff581e JO |
981 | static int |
982 | dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, | |
983 | symbol_filter_t filter) | |
8ce998d6 ACM |
984 | { |
985 | uint32_t nr_rel_entries, idx; | |
986 | GElf_Sym sym; | |
9cffa8d5 | 987 | u64 plt_offset; |
8ce998d6 ACM |
988 | GElf_Shdr shdr_plt; |
989 | struct symbol *f; | |
a25e46c4 | 990 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 991 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
992 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
993 | size_t dynsym_idx; | |
994 | GElf_Ehdr ehdr; | |
8ce998d6 | 995 | char sympltname[1024]; |
a25e46c4 ACM |
996 | Elf *elf; |
997 | int nr = 0, symidx, fd, err = 0; | |
998 | ||
ec5761ea | 999 | fd = open(name, O_RDONLY); |
a25e46c4 ACM |
1000 | if (fd < 0) |
1001 | goto out; | |
1002 | ||
84087126 | 1003 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
1004 | if (elf == NULL) |
1005 | goto out_close; | |
1006 | ||
1007 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
1008 | goto out_elf_end; | |
1009 | ||
1010 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
1011 | ".dynsym", &dynsym_idx); | |
1012 | if (scn_dynsym == NULL) | |
1013 | goto out_elf_end; | |
8ce998d6 | 1014 | |
a25e46c4 | 1015 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
1016 | ".rela.plt", NULL); |
1017 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 1018 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
1019 | ".rel.plt", NULL); |
1020 | if (scn_plt_rel == NULL) | |
a25e46c4 | 1021 | goto out_elf_end; |
8ce998d6 ACM |
1022 | } |
1023 | ||
a25e46c4 ACM |
1024 | err = -1; |
1025 | ||
8ce998d6 | 1026 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 1027 | goto out_elf_end; |
8ce998d6 | 1028 | |
a25e46c4 ACM |
1029 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
1030 | goto out_elf_end; | |
8ce998d6 ACM |
1031 | |
1032 | /* | |
83a0944f | 1033 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
1034 | * and the symbols in the .dynsym they refer to. |
1035 | */ | |
1036 | reldata = elf_getdata(scn_plt_rel, NULL); | |
1037 | if (reldata == NULL) | |
a25e46c4 | 1038 | goto out_elf_end; |
8ce998d6 ACM |
1039 | |
1040 | syms = elf_getdata(scn_dynsym, NULL); | |
1041 | if (syms == NULL) | |
a25e46c4 | 1042 | goto out_elf_end; |
8ce998d6 | 1043 | |
a25e46c4 | 1044 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 1045 | if (scn_symstrs == NULL) |
a25e46c4 | 1046 | goto out_elf_end; |
8ce998d6 ACM |
1047 | |
1048 | symstrs = elf_getdata(scn_symstrs, NULL); | |
1049 | if (symstrs == NULL) | |
a25e46c4 | 1050 | goto out_elf_end; |
8ce998d6 ACM |
1051 | |
1052 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
1053 | plt_offset = shdr_plt.sh_offset; | |
1054 | ||
1055 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
1056 | GElf_Rela pos_mem, *pos; | |
1057 | ||
1058 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
1059 | nr_rel_entries) { | |
1060 | symidx = GELF_R_SYM(pos->r_info); | |
1061 | plt_offset += shdr_plt.sh_entsize; | |
1062 | gelf_getsym(syms, symidx, &sym); | |
1063 | snprintf(sympltname, sizeof(sympltname), | |
1064 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1065 | ||
1066 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1067 | STB_GLOBAL, sympltname); |
8ce998d6 | 1068 | if (!f) |
a25e46c4 | 1069 | goto out_elf_end; |
8ce998d6 | 1070 | |
82164161 ACM |
1071 | if (filter && filter(map, f)) |
1072 | symbol__delete(f); | |
1073 | else { | |
aeafcbaf | 1074 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1075 | ++nr; |
1076 | } | |
8ce998d6 ACM |
1077 | } |
1078 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
1079 | GElf_Rel pos_mem, *pos; | |
1080 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
1081 | nr_rel_entries) { | |
1082 | symidx = GELF_R_SYM(pos->r_info); | |
1083 | plt_offset += shdr_plt.sh_entsize; | |
1084 | gelf_getsym(syms, symidx, &sym); | |
1085 | snprintf(sympltname, sizeof(sympltname), | |
1086 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
1087 | ||
1088 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 1089 | STB_GLOBAL, sympltname); |
8ce998d6 | 1090 | if (!f) |
a25e46c4 | 1091 | goto out_elf_end; |
8ce998d6 | 1092 | |
82164161 ACM |
1093 | if (filter && filter(map, f)) |
1094 | symbol__delete(f); | |
1095 | else { | |
aeafcbaf | 1096 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
1097 | ++nr; |
1098 | } | |
8ce998d6 | 1099 | } |
8ce998d6 ACM |
1100 | } |
1101 | ||
a25e46c4 ACM |
1102 | err = 0; |
1103 | out_elf_end: | |
1104 | elf_end(elf); | |
1105 | out_close: | |
1106 | close(fd); | |
1107 | ||
1108 | if (err == 0) | |
1109 | return nr; | |
1110 | out: | |
fe2197b8 | 1111 | pr_debug("%s: problems reading %s PLT info.\n", |
aeafcbaf | 1112 | __func__, dso->long_name); |
a25e46c4 | 1113 | return 0; |
8ce998d6 ACM |
1114 | } |
1115 | ||
aeafcbaf | 1116 | static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type) |
d45868d3 ACM |
1117 | { |
1118 | switch (type) { | |
1119 | case MAP__FUNCTION: | |
aeafcbaf | 1120 | return elf_sym__is_function(sym); |
f1dfa0b1 | 1121 | case MAP__VARIABLE: |
aeafcbaf | 1122 | return elf_sym__is_object(sym); |
d45868d3 ACM |
1123 | default: |
1124 | return false; | |
1125 | } | |
1126 | } | |
1127 | ||
aeafcbaf ACM |
1128 | static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs, |
1129 | enum map_type type) | |
d45868d3 ACM |
1130 | { |
1131 | switch (type) { | |
1132 | case MAP__FUNCTION: | |
aeafcbaf | 1133 | return elf_sec__is_text(shdr, secstrs); |
f1dfa0b1 | 1134 | case MAP__VARIABLE: |
aeafcbaf | 1135 | return elf_sec__is_data(shdr, secstrs); |
d45868d3 ACM |
1136 | default: |
1137 | return false; | |
1138 | } | |
1139 | } | |
1140 | ||
70c3856b EM |
1141 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
1142 | { | |
1143 | Elf_Scn *sec = NULL; | |
1144 | GElf_Shdr shdr; | |
1145 | size_t cnt = 1; | |
1146 | ||
1147 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
1148 | gelf_getshdr(sec, &shdr); | |
1149 | ||
1150 | if ((addr >= shdr.sh_addr) && | |
1151 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
1152 | return cnt; | |
1153 | ||
1154 | ++cnt; | |
1155 | } | |
1156 | ||
1157 | return -1; | |
1158 | } | |
1159 | ||
8db4841f JO |
1160 | static int dso__swap_init(struct dso *dso, unsigned char eidata) |
1161 | { | |
1162 | static unsigned int const endian = 1; | |
1163 | ||
1164 | dso->needs_swap = DSO_SWAP__NO; | |
1165 | ||
1166 | switch (eidata) { | |
1167 | case ELFDATA2LSB: | |
1168 | /* We are big endian, DSO is little endian. */ | |
1169 | if (*(unsigned char const *)&endian != 1) | |
1170 | dso->needs_swap = DSO_SWAP__YES; | |
1171 | break; | |
1172 | ||
1173 | case ELFDATA2MSB: | |
1174 | /* We are little endian, DSO is big endian. */ | |
1175 | if (*(unsigned char const *)&endian != 0) | |
1176 | dso->needs_swap = DSO_SWAP__YES; | |
1177 | break; | |
1178 | ||
1179 | default: | |
1180 | pr_err("unrecognized DSO data encoding %d\n", eidata); | |
1181 | return -EINVAL; | |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
aeafcbaf | 1187 | static int dso__load_sym(struct dso *dso, struct map *map, const char *name, |
6da80ce8 DM |
1188 | int fd, symbol_filter_t filter, int kmodule, |
1189 | int want_symtab) | |
a2928c42 | 1190 | { |
aeafcbaf | 1191 | struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL; |
2e538c4a | 1192 | struct map *curr_map = map; |
aeafcbaf | 1193 | struct dso *curr_dso = dso; |
6cfcc53e | 1194 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1195 | uint32_t nr_syms; |
1196 | int err = -1; | |
83a0944f | 1197 | uint32_t idx; |
a2928c42 | 1198 | GElf_Ehdr ehdr; |
70c3856b EM |
1199 | GElf_Shdr shdr, opdshdr; |
1200 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1201 | GElf_Sym sym; |
70c3856b | 1202 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1203 | Elf *elf; |
439d473b | 1204 | int nr = 0; |
70c3856b | 1205 | size_t opdidx = 0; |
a2928c42 | 1206 | |
84087126 | 1207 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1208 | if (elf == NULL) { |
8b1389ef | 1209 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1210 | goto out_close; |
1211 | } | |
1212 | ||
1213 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1214 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1215 | goto out_elf_end; |
1216 | } | |
1217 | ||
8db4841f JO |
1218 | if (dso__swap_init(dso, ehdr.e_ident[EI_DATA])) |
1219 | goto out_elf_end; | |
1220 | ||
6da80ce8 | 1221 | /* Always reject images with a mismatched build-id: */ |
aeafcbaf | 1222 | if (dso->has_build_id) { |
21916c38 DM |
1223 | u8 build_id[BUILD_ID_SIZE]; |
1224 | ||
be96ea8f | 1225 | if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0) |
21916c38 DM |
1226 | goto out_elf_end; |
1227 | ||
aeafcbaf | 1228 | if (!dso__build_id_equal(dso, build_id)) |
21916c38 DM |
1229 | goto out_elf_end; |
1230 | } | |
1231 | ||
a2928c42 | 1232 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1233 | if (sec == NULL) { |
6da80ce8 DM |
1234 | if (want_symtab) |
1235 | goto out_elf_end; | |
1236 | ||
a25e46c4 ACM |
1237 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1238 | if (sec == NULL) | |
8ce998d6 | 1239 | goto out_elf_end; |
8ce998d6 | 1240 | } |
a2928c42 | 1241 | |
70c3856b | 1242 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
adb09184 AB |
1243 | if (opdshdr.sh_type != SHT_PROGBITS) |
1244 | opdsec = NULL; | |
70c3856b EM |
1245 | if (opdsec) |
1246 | opddata = elf_rawdata(opdsec, NULL); | |
1247 | ||
a2928c42 ACM |
1248 | syms = elf_getdata(sec, NULL); |
1249 | if (syms == NULL) | |
1250 | goto out_elf_end; | |
1251 | ||
1252 | sec = elf_getscn(elf, shdr.sh_link); | |
1253 | if (sec == NULL) | |
1254 | goto out_elf_end; | |
1255 | ||
1256 | symstrs = elf_getdata(sec, NULL); | |
1257 | if (symstrs == NULL) | |
1258 | goto out_elf_end; | |
1259 | ||
6cfcc53e MG |
1260 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1261 | if (sec_strndx == NULL) | |
1262 | goto out_elf_end; | |
1263 | ||
1264 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1265 | if (secstrs == NULL) |
6cfcc53e MG |
1266 | goto out_elf_end; |
1267 | ||
a2928c42 ACM |
1268 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1269 | ||
e9fbc9dc | 1270 | memset(&sym, 0, sizeof(sym)); |
aeafcbaf ACM |
1271 | if (dso->kernel == DSO_TYPE_USER) { |
1272 | dso->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
1273 | elf_section_by_name(elf, &ehdr, &shdr, |
1274 | ".gnu.prelink_undo", | |
1275 | NULL) != NULL); | |
aeafcbaf ACM |
1276 | } else { |
1277 | dso->adjust_symbols = 0; | |
1278 | } | |
83a0944f | 1279 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1280 | struct symbol *f; |
56b03f3c | 1281 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1282 | char *demangled = NULL; |
6cfcc53e MG |
1283 | int is_label = elf_sym__is_label(&sym); |
1284 | const char *section_name; | |
a2928c42 | 1285 | |
9de89fe7 ACM |
1286 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1287 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1288 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1289 | |
d45868d3 | 1290 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1291 | continue; |
1292 | ||
696b97a5 DM |
1293 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1294 | * don't identify functions, so will confuse the profile | |
1295 | * output: */ | |
1296 | if (ehdr.e_machine == EM_ARM) { | |
1297 | if (!strcmp(elf_name, "$a") || | |
1298 | !strcmp(elf_name, "$d") || | |
1299 | !strcmp(elf_name, "$t")) | |
1300 | continue; | |
1301 | } | |
1302 | ||
70c3856b EM |
1303 | if (opdsec && sym.st_shndx == opdidx) { |
1304 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1305 | u64 *opd = opddata->d_buf + offset; | |
8db4841f | 1306 | sym.st_value = DSO__SWAP(dso, u64, *opd); |
70c3856b EM |
1307 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); |
1308 | } | |
1309 | ||
a2928c42 ACM |
1310 | sec = elf_getscn(elf, sym.st_shndx); |
1311 | if (!sec) | |
1312 | goto out_elf_end; | |
1313 | ||
1314 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1315 | |
d45868d3 | 1316 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1317 | continue; |
1318 | ||
1319 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1320 | |
b2f8fb23 DDAG |
1321 | /* On ARM, symbols for thumb functions have 1 added to |
1322 | * the symbol address as a flag - remove it */ | |
1323 | if ((ehdr.e_machine == EM_ARM) && | |
1324 | (map->type == MAP__FUNCTION) && | |
1325 | (sym.st_value & 1)) | |
1326 | --sym.st_value; | |
1327 | ||
aeafcbaf | 1328 | if (dso->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1329 | char dso_name[PATH_MAX]; |
1330 | ||
1331 | if (strcmp(section_name, | |
b63be8d7 | 1332 | (curr_dso->short_name + |
aeafcbaf | 1333 | dso->short_name_len)) == 0) |
2e538c4a ACM |
1334 | goto new_symbol; |
1335 | ||
1336 | if (strcmp(section_name, ".text") == 0) { | |
1337 | curr_map = map; | |
aeafcbaf | 1338 | curr_dso = dso; |
2e538c4a ACM |
1339 | goto new_symbol; |
1340 | } | |
1341 | ||
1342 | snprintf(dso_name, sizeof(dso_name), | |
aeafcbaf | 1343 | "%s%s", dso->short_name, section_name); |
2e538c4a | 1344 | |
9de89fe7 | 1345 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1346 | if (curr_map == NULL) { |
1347 | u64 start = sym.st_value; | |
1348 | ||
1349 | if (kmodule) | |
1350 | start += map->start + shdr.sh_offset; | |
1351 | ||
00a192b3 | 1352 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1353 | if (curr_dso == NULL) |
1354 | goto out_elf_end; | |
aeafcbaf ACM |
1355 | curr_dso->kernel = dso->kernel; |
1356 | curr_dso->long_name = dso->long_name; | |
1357 | curr_dso->long_name_len = dso->long_name_len; | |
3610583c | 1358 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1359 | map->type); |
2e538c4a ACM |
1360 | if (curr_map == NULL) { |
1361 | dso__delete(curr_dso); | |
1362 | goto out_elf_end; | |
1363 | } | |
ed52ce2e ACM |
1364 | curr_map->map_ip = identity__map_ip; |
1365 | curr_map->unmap_ip = identity__map_ip; | |
aeafcbaf | 1366 | curr_dso->symtab_type = dso->symtab_type; |
9de89fe7 | 1367 | map_groups__insert(kmap->kmaps, curr_map); |
aeafcbaf | 1368 | dsos__add(&dso->node, curr_dso); |
6275ce2d | 1369 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1370 | } else |
1371 | curr_dso = curr_map->dso; | |
1372 | ||
1373 | goto new_symbol; | |
af427bf5 ACM |
1374 | } |
1375 | ||
2e538c4a | 1376 | if (curr_dso->adjust_symbols) { |
9486aa38 ACM |
1377 | pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " " |
1378 | "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__, | |
29a9f66d ACM |
1379 | (u64)sym.st_value, (u64)shdr.sh_addr, |
1380 | (u64)shdr.sh_offset); | |
f5812a7a | 1381 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1382 | } |
28ac909b ACM |
1383 | /* |
1384 | * We need to figure out if the object was created from C++ sources | |
1385 | * DWARF DW_compile_unit has this, but we don't always have access | |
1386 | * to it... | |
1387 | */ | |
83a0944f | 1388 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1389 | if (demangled != NULL) |
83a0944f | 1390 | elf_name = demangled; |
2e538c4a | 1391 | new_symbol: |
c408fedf ACM |
1392 | f = symbol__new(sym.st_value, sym.st_size, |
1393 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1394 | free(demangled); |
a2928c42 ACM |
1395 | if (!f) |
1396 | goto out_elf_end; | |
1397 | ||
2e538c4a | 1398 | if (filter && filter(curr_map, f)) |
00a192b3 | 1399 | symbol__delete(f); |
69ee69f6 | 1400 | else { |
6a4694a4 | 1401 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1402 | nr++; |
1403 | } | |
a2928c42 ACM |
1404 | } |
1405 | ||
2e538c4a ACM |
1406 | /* |
1407 | * For misannotated, zeroed, ASM function sizes. | |
1408 | */ | |
6275ce2d | 1409 | if (nr > 0) { |
694bf407 | 1410 | symbols__fixup_duplicate(&dso->symbols[map->type]); |
aeafcbaf | 1411 | symbols__fixup_end(&dso->symbols[map->type]); |
6275ce2d ACM |
1412 | if (kmap) { |
1413 | /* | |
1414 | * We need to fixup this here too because we create new | |
1415 | * maps here, for things like vsyscall sections. | |
1416 | */ | |
1417 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1418 | } | |
1419 | } | |
a2928c42 ACM |
1420 | err = nr; |
1421 | out_elf_end: | |
1422 | elf_end(elf); | |
1423 | out_close: | |
1424 | return err; | |
1425 | } | |
1426 | ||
aeafcbaf | 1427 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id) |
78075caa | 1428 | { |
aeafcbaf | 1429 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; |
78075caa ACM |
1430 | } |
1431 | ||
a1645ce1 | 1432 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1433 | { |
e30a3d12 | 1434 | bool have_build_id = false; |
57f395a7 FW |
1435 | struct dso *pos; |
1436 | ||
6122e4e4 ACM |
1437 | list_for_each_entry(pos, head, node) { |
1438 | if (with_hits && !pos->hit) | |
1439 | continue; | |
f6e1467d ACM |
1440 | if (pos->has_build_id) { |
1441 | have_build_id = true; | |
1442 | continue; | |
1443 | } | |
e30a3d12 ACM |
1444 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1445 | sizeof(pos->build_id)) > 0) { | |
1446 | have_build_id = true; | |
1447 | pos->has_build_id = true; | |
1448 | } | |
6122e4e4 | 1449 | } |
57f395a7 | 1450 | |
e30a3d12 | 1451 | return have_build_id; |
57f395a7 FW |
1452 | } |
1453 | ||
fd7a346e ACM |
1454 | /* |
1455 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1456 | */ | |
1457 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1458 | ||
21916c38 | 1459 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1460 | { |
21916c38 | 1461 | int err = -1; |
4d1e00a8 ACM |
1462 | GElf_Ehdr ehdr; |
1463 | GElf_Shdr shdr; | |
fd7a346e | 1464 | Elf_Data *data; |
4d1e00a8 | 1465 | Elf_Scn *sec; |
e57cfcda | 1466 | Elf_Kind ek; |
fd7a346e | 1467 | void *ptr; |
4d1e00a8 | 1468 | |
2643ce11 ACM |
1469 | if (size < BUILD_ID_SIZE) |
1470 | goto out; | |
1471 | ||
e57cfcda PE |
1472 | ek = elf_kind(elf); |
1473 | if (ek != ELF_K_ELF) | |
21916c38 | 1474 | goto out; |
e57cfcda | 1475 | |
4d1e00a8 | 1476 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1477 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1478 | goto out; |
4d1e00a8 ACM |
1479 | } |
1480 | ||
2643ce11 ACM |
1481 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1482 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1483 | if (sec == NULL) { |
1484 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1485 | ".notes", NULL); | |
1486 | if (sec == NULL) | |
21916c38 | 1487 | goto out; |
fd7a346e | 1488 | } |
4d1e00a8 | 1489 | |
fd7a346e ACM |
1490 | data = elf_getdata(sec, NULL); |
1491 | if (data == NULL) | |
21916c38 | 1492 | goto out; |
fd7a346e ACM |
1493 | |
1494 | ptr = data->d_buf; | |
1495 | while (ptr < (data->d_buf + data->d_size)) { | |
1496 | GElf_Nhdr *nhdr = ptr; | |
be96ea8f SE |
1497 | size_t namesz = NOTE_ALIGN(nhdr->n_namesz), |
1498 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
fd7a346e ACM |
1499 | const char *name; |
1500 | ||
1501 | ptr += sizeof(*nhdr); | |
1502 | name = ptr; | |
1503 | ptr += namesz; | |
1504 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1505 | nhdr->n_namesz == sizeof("GNU")) { | |
1506 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1507 | size_t sz = min(size, descsz); |
1508 | memcpy(bf, ptr, sz); | |
1509 | memset(bf + sz, 0, size - sz); | |
1510 | err = descsz; | |
fd7a346e ACM |
1511 | break; |
1512 | } | |
1513 | } | |
1514 | ptr += descsz; | |
1515 | } | |
21916c38 DM |
1516 | |
1517 | out: | |
1518 | return err; | |
1519 | } | |
1520 | ||
1521 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1522 | { | |
1523 | int fd, err = -1; | |
1524 | Elf *elf; | |
1525 | ||
1526 | if (size < BUILD_ID_SIZE) | |
1527 | goto out; | |
1528 | ||
1529 | fd = open(filename, O_RDONLY); | |
1530 | if (fd < 0) | |
1531 | goto out; | |
1532 | ||
1533 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1534 | if (elf == NULL) { | |
1535 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1536 | goto out_close; | |
1537 | } | |
1538 | ||
1539 | err = elf_read_build_id(elf, bf, size); | |
1540 | ||
2643ce11 ACM |
1541 | elf_end(elf); |
1542 | out_close: | |
1543 | close(fd); | |
1544 | out: | |
1545 | return err; | |
1546 | } | |
1547 | ||
f1617b40 ACM |
1548 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1549 | { | |
1550 | int fd, err = -1; | |
1551 | ||
1552 | if (size < BUILD_ID_SIZE) | |
1553 | goto out; | |
1554 | ||
1555 | fd = open(filename, O_RDONLY); | |
1556 | if (fd < 0) | |
1557 | goto out; | |
1558 | ||
1559 | while (1) { | |
1560 | char bf[BUFSIZ]; | |
1561 | GElf_Nhdr nhdr; | |
be96ea8f | 1562 | size_t namesz, descsz; |
f1617b40 ACM |
1563 | |
1564 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1565 | break; | |
1566 | ||
fd7a346e ACM |
1567 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1568 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1569 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1570 | nhdr.n_namesz == sizeof("GNU")) { | |
be96ea8f | 1571 | if (read(fd, bf, namesz) != (ssize_t)namesz) |
f1617b40 ACM |
1572 | break; |
1573 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
be96ea8f SE |
1574 | size_t sz = min(descsz, size); |
1575 | if (read(fd, build_id, sz) == (ssize_t)sz) { | |
1576 | memset(build_id + sz, 0, size - sz); | |
f1617b40 ACM |
1577 | err = 0; |
1578 | break; | |
1579 | } | |
be96ea8f | 1580 | } else if (read(fd, bf, descsz) != (ssize_t)descsz) |
f1617b40 ACM |
1581 | break; |
1582 | } else { | |
1583 | int n = namesz + descsz; | |
1584 | if (read(fd, bf, n) != n) | |
1585 | break; | |
1586 | } | |
1587 | } | |
1588 | close(fd); | |
1589 | out: | |
1590 | return err; | |
1591 | } | |
1592 | ||
209bd9e3 PLG |
1593 | static int filename__read_debuglink(const char *filename, |
1594 | char *debuglink, size_t size) | |
1595 | { | |
1596 | int fd, err = -1; | |
1597 | Elf *elf; | |
1598 | GElf_Ehdr ehdr; | |
1599 | GElf_Shdr shdr; | |
1600 | Elf_Data *data; | |
1601 | Elf_Scn *sec; | |
1602 | Elf_Kind ek; | |
1603 | ||
1604 | fd = open(filename, O_RDONLY); | |
1605 | if (fd < 0) | |
1606 | goto out; | |
1607 | ||
1608 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1609 | if (elf == NULL) { | |
1610 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1611 | goto out_close; | |
1612 | } | |
1613 | ||
1614 | ek = elf_kind(elf); | |
1615 | if (ek != ELF_K_ELF) | |
1616 | goto out_close; | |
1617 | ||
1618 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
1619 | pr_err("%s: cannot get elf header.\n", __func__); | |
1620 | goto out_close; | |
1621 | } | |
1622 | ||
1623 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1624 | ".gnu_debuglink", NULL); | |
1625 | if (sec == NULL) | |
1626 | goto out_close; | |
1627 | ||
1628 | data = elf_getdata(sec, NULL); | |
1629 | if (data == NULL) | |
1630 | goto out_close; | |
1631 | ||
1632 | /* the start of this section is a zero-terminated string */ | |
1633 | strncpy(debuglink, data->d_buf, size); | |
1634 | ||
1635 | elf_end(elf); | |
1636 | ||
1637 | out_close: | |
1638 | close(fd); | |
1639 | out: | |
1640 | return err; | |
1641 | } | |
1642 | ||
aeafcbaf | 1643 | char dso__symtab_origin(const struct dso *dso) |
94cb9e38 ACM |
1644 | { |
1645 | static const char origin[] = { | |
878b439d ACM |
1646 | [SYMTAB__KALLSYMS] = 'k', |
1647 | [SYMTAB__JAVA_JIT] = 'j', | |
209bd9e3 | 1648 | [SYMTAB__DEBUGLINK] = 'l', |
878b439d ACM |
1649 | [SYMTAB__BUILD_ID_CACHE] = 'B', |
1650 | [SYMTAB__FEDORA_DEBUGINFO] = 'f', | |
1651 | [SYMTAB__UBUNTU_DEBUGINFO] = 'u', | |
1652 | [SYMTAB__BUILDID_DEBUGINFO] = 'b', | |
1653 | [SYMTAB__SYSTEM_PATH_DSO] = 'd', | |
1654 | [SYMTAB__SYSTEM_PATH_KMODULE] = 'K', | |
1655 | [SYMTAB__GUEST_KALLSYMS] = 'g', | |
1656 | [SYMTAB__GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1657 | }; |
1658 | ||
aeafcbaf | 1659 | if (dso == NULL || dso->symtab_type == SYMTAB__NOT_FOUND) |
94cb9e38 | 1660 | return '!'; |
aeafcbaf | 1661 | return origin[dso->symtab_type]; |
94cb9e38 ACM |
1662 | } |
1663 | ||
aeafcbaf | 1664 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1665 | { |
4d1e00a8 | 1666 | int size = PATH_MAX; |
c338aee8 | 1667 | char *name; |
a2928c42 ACM |
1668 | int ret = -1; |
1669 | int fd; | |
23346f21 | 1670 | struct machine *machine; |
a1645ce1 | 1671 | const char *root_dir; |
6da80ce8 | 1672 | int want_symtab; |
a2928c42 | 1673 | |
aeafcbaf | 1674 | dso__set_loaded(dso, map->type); |
66bd8424 | 1675 | |
aeafcbaf ACM |
1676 | if (dso->kernel == DSO_TYPE_KERNEL) |
1677 | return dso__load_kernel_sym(dso, map, filter); | |
1678 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1679 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1680 | |
23346f21 ACM |
1681 | if (map->groups && map->groups->machine) |
1682 | machine = map->groups->machine; | |
a1645ce1 | 1683 | else |
23346f21 | 1684 | machine = NULL; |
c338aee8 ACM |
1685 | |
1686 | name = malloc(size); | |
a2928c42 ACM |
1687 | if (!name) |
1688 | return -1; | |
1689 | ||
aeafcbaf | 1690 | dso->adjust_symbols = 0; |
f5812a7a | 1691 | |
aeafcbaf | 1692 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1693 | struct stat st; |
1694 | ||
e9b52ef2 | 1695 | if (lstat(dso->name, &st) < 0) |
981c1252 PE |
1696 | return -1; |
1697 | ||
1698 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1699 | pr_warning("File %s not owned by current user or root, " | |
1700 | "ignoring it.\n", dso->name); | |
1701 | return -1; | |
1702 | } | |
1703 | ||
aeafcbaf ACM |
1704 | ret = dso__load_perf_map(dso, map, filter); |
1705 | dso->symtab_type = ret > 0 ? SYMTAB__JAVA_JIT : | |
878b439d | 1706 | SYMTAB__NOT_FOUND; |
94cb9e38 ACM |
1707 | return ret; |
1708 | } | |
1709 | ||
6da80ce8 DM |
1710 | /* Iterate over candidate debug images. |
1711 | * On the first pass, only load images if they have a full symtab. | |
1712 | * Failing that, do a second pass where we accept .dynsym also | |
1713 | */ | |
60e4b10c ACM |
1714 | want_symtab = 1; |
1715 | restart: | |
209bd9e3 | 1716 | for (dso->symtab_type = SYMTAB__DEBUGLINK; |
aeafcbaf ACM |
1717 | dso->symtab_type != SYMTAB__NOT_FOUND; |
1718 | dso->symtab_type++) { | |
1719 | switch (dso->symtab_type) { | |
209bd9e3 PLG |
1720 | case SYMTAB__DEBUGLINK: { |
1721 | char *debuglink; | |
1722 | strncpy(name, dso->long_name, size); | |
1723 | debuglink = name + dso->long_name_len; | |
1724 | while (debuglink != name && *debuglink != '/') | |
1725 | debuglink--; | |
1726 | if (*debuglink == '/') | |
1727 | debuglink++; | |
1728 | filename__read_debuglink(dso->long_name, debuglink, | |
1729 | size - (debuglink - name)); | |
1730 | } | |
1731 | break; | |
878b439d | 1732 | case SYMTAB__BUILD_ID_CACHE: |
ec5761ea DA |
1733 | /* skip the locally configured cache if a symfs is given */ |
1734 | if (symbol_conf.symfs[0] || | |
aeafcbaf | 1735 | (dso__build_id_filename(dso, name, size) == NULL)) { |
6da80ce8 | 1736 | continue; |
ec5761ea | 1737 | } |
6da80ce8 | 1738 | break; |
878b439d | 1739 | case SYMTAB__FEDORA_DEBUGINFO: |
ec5761ea | 1740 | snprintf(name, size, "%s/usr/lib/debug%s.debug", |
aeafcbaf | 1741 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1742 | break; |
878b439d | 1743 | case SYMTAB__UBUNTU_DEBUGINFO: |
ec5761ea | 1744 | snprintf(name, size, "%s/usr/lib/debug%s", |
aeafcbaf | 1745 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1746 | break; |
878b439d | 1747 | case SYMTAB__BUILDID_DEBUGINFO: { |
6da80ce8 DM |
1748 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
1749 | ||
aeafcbaf | 1750 | if (!dso->has_build_id) |
6da80ce8 DM |
1751 | continue; |
1752 | ||
aeafcbaf ACM |
1753 | build_id__sprintf(dso->build_id, |
1754 | sizeof(dso->build_id), | |
6da80ce8 DM |
1755 | build_id_hex); |
1756 | snprintf(name, size, | |
ec5761ea DA |
1757 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", |
1758 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1759 | } |
6da80ce8 | 1760 | break; |
878b439d | 1761 | case SYMTAB__SYSTEM_PATH_DSO: |
ec5761ea | 1762 | snprintf(name, size, "%s%s", |
aeafcbaf | 1763 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1764 | break; |
878b439d | 1765 | case SYMTAB__GUEST_KMODULE: |
fb7d0b3c KM |
1766 | if (map->groups && machine) |
1767 | root_dir = machine->root_dir; | |
a1645ce1 ZY |
1768 | else |
1769 | root_dir = ""; | |
ec5761ea | 1770 | snprintf(name, size, "%s%s%s", symbol_conf.symfs, |
aeafcbaf | 1771 | root_dir, dso->long_name); |
ec5761ea DA |
1772 | break; |
1773 | ||
878b439d | 1774 | case SYMTAB__SYSTEM_PATH_KMODULE: |
ec5761ea | 1775 | snprintf(name, size, "%s%s", symbol_conf.symfs, |
aeafcbaf | 1776 | dso->long_name); |
a1645ce1 | 1777 | break; |
60e4b10c | 1778 | default:; |
a2928c42 | 1779 | } |
6da80ce8 DM |
1780 | |
1781 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1782 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1783 | if (fd < 0) |
1784 | continue; | |
a2928c42 | 1785 | |
aeafcbaf | 1786 | ret = dso__load_sym(dso, map, name, fd, filter, 0, |
6da80ce8 DM |
1787 | want_symtab); |
1788 | close(fd); | |
a2928c42 | 1789 | |
6da80ce8 DM |
1790 | /* |
1791 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1792 | * info!?!? | |
1793 | */ | |
1794 | if (!ret) | |
1795 | continue; | |
a2928c42 | 1796 | |
6da80ce8 | 1797 | if (ret > 0) { |
33ff581e JO |
1798 | int nr_plt; |
1799 | ||
1800 | nr_plt = dso__synthesize_plt_symbols(dso, name, map, filter); | |
6da80ce8 DM |
1801 | if (nr_plt > 0) |
1802 | ret += nr_plt; | |
1803 | break; | |
1804 | } | |
a25e46c4 | 1805 | } |
6da80ce8 | 1806 | |
60e4b10c ACM |
1807 | /* |
1808 | * If we wanted a full symtab but no image had one, | |
1809 | * relax our requirements and repeat the search. | |
1810 | */ | |
1811 | if (ret <= 0 && want_symtab) { | |
1812 | want_symtab = 0; | |
1813 | goto restart; | |
1814 | } | |
1815 | ||
a2928c42 | 1816 | free(name); |
aeafcbaf | 1817 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1818 | return 0; |
a2928c42 ACM |
1819 | return ret; |
1820 | } | |
1821 | ||
aeafcbaf | 1822 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1823 | enum map_type type, const char *name) |
439d473b ACM |
1824 | { |
1825 | struct rb_node *nd; | |
1826 | ||
aeafcbaf | 1827 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1828 | struct map *map = rb_entry(nd, struct map, rb_node); |
1829 | ||
b7cece76 | 1830 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1831 | return map; |
1832 | } | |
1833 | ||
1834 | return NULL; | |
1835 | } | |
1836 | ||
aeafcbaf ACM |
1837 | static int dso__kernel_module_get_build_id(struct dso *dso, |
1838 | const char *root_dir) | |
b7cece76 ACM |
1839 | { |
1840 | char filename[PATH_MAX]; | |
1841 | /* | |
1842 | * kernel module short names are of the form "[module]" and | |
1843 | * we need just "module" here. | |
1844 | */ | |
aeafcbaf | 1845 | const char *name = dso->short_name + 1; |
b7cece76 ACM |
1846 | |
1847 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1848 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1849 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 | 1850 | |
aeafcbaf ACM |
1851 | if (sysfs__read_build_id(filename, dso->build_id, |
1852 | sizeof(dso->build_id)) == 0) | |
1853 | dso->has_build_id = true; | |
b7cece76 ACM |
1854 | |
1855 | return 0; | |
1856 | } | |
1857 | ||
aeafcbaf | 1858 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
a1645ce1 | 1859 | const char *dir_name) |
6cfcc53e | 1860 | { |
439d473b | 1861 | struct dirent *dent; |
5aab621b | 1862 | DIR *dir = opendir(dir_name); |
74534341 | 1863 | int ret = 0; |
6cfcc53e | 1864 | |
439d473b | 1865 | if (!dir) { |
5aab621b | 1866 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1867 | return -1; |
1868 | } | |
6cfcc53e | 1869 | |
439d473b ACM |
1870 | while ((dent = readdir(dir)) != NULL) { |
1871 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1872 | struct stat st; |
1873 | ||
1874 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
2b600f95 | 1875 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); |
a1645ce1 ZY |
1876 | if (stat(path, &st)) |
1877 | continue; | |
439d473b | 1878 | |
a1645ce1 | 1879 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1880 | if (!strcmp(dent->d_name, ".") || |
1881 | !strcmp(dent->d_name, "..")) | |
1882 | continue; | |
1883 | ||
aeafcbaf | 1884 | ret = map_groups__set_modules_path_dir(mg, path); |
74534341 GJ |
1885 | if (ret < 0) |
1886 | goto out; | |
439d473b ACM |
1887 | } else { |
1888 | char *dot = strrchr(dent->d_name, '.'), | |
1889 | dso_name[PATH_MAX]; | |
1890 | struct map *map; | |
cfc10d3b | 1891 | char *long_name; |
439d473b ACM |
1892 | |
1893 | if (dot == NULL || strcmp(dot, ".ko")) | |
1894 | continue; | |
1895 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1896 | (int)(dot - dent->d_name), dent->d_name); | |
1897 | ||
a2a99e8e | 1898 | strxfrchar(dso_name, '-', '_'); |
aeafcbaf ACM |
1899 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
1900 | dso_name); | |
439d473b ACM |
1901 | if (map == NULL) |
1902 | continue; | |
1903 | ||
cfc10d3b | 1904 | long_name = strdup(path); |
74534341 GJ |
1905 | if (long_name == NULL) { |
1906 | ret = -1; | |
1907 | goto out; | |
1908 | } | |
cfc10d3b | 1909 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1910 | map->dso->lname_alloc = 1; |
a1645ce1 | 1911 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1912 | } |
439d473b | 1913 | } |
6cfcc53e | 1914 | |
74534341 | 1915 | out: |
439d473b | 1916 | closedir(dir); |
74534341 | 1917 | return ret; |
439d473b | 1918 | } |
6cfcc53e | 1919 | |
a1645ce1 | 1920 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1921 | { |
a1645ce1 ZY |
1922 | char version[PATH_MAX]; |
1923 | FILE *file; | |
1924 | char *name, *tmp; | |
1925 | const char *prefix = "Linux version "; | |
1926 | ||
1927 | sprintf(version, "%s/proc/version", root_dir); | |
1928 | file = fopen(version, "r"); | |
1929 | if (!file) | |
1930 | return NULL; | |
1931 | ||
1932 | version[0] = '\0'; | |
1933 | tmp = fgets(version, sizeof(version), file); | |
1934 | fclose(file); | |
1935 | ||
1936 | name = strstr(version, prefix); | |
1937 | if (!name) | |
1938 | return NULL; | |
1939 | name += strlen(prefix); | |
1940 | tmp = strchr(name, ' '); | |
1941 | if (tmp) | |
1942 | *tmp = '\0'; | |
1943 | ||
1944 | return strdup(name); | |
1945 | } | |
1946 | ||
aeafcbaf | 1947 | static int machine__set_modules_path(struct machine *machine) |
a1645ce1 ZY |
1948 | { |
1949 | char *version; | |
439d473b | 1950 | char modules_path[PATH_MAX]; |
6cfcc53e | 1951 | |
aeafcbaf | 1952 | version = get_kernel_version(machine->root_dir); |
a1645ce1 | 1953 | if (!version) |
439d473b | 1954 | return -1; |
6cfcc53e | 1955 | |
a1645ce1 | 1956 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
aeafcbaf | 1957 | machine->root_dir, version); |
a1645ce1 | 1958 | free(version); |
6cfcc53e | 1959 | |
aeafcbaf | 1960 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
6cfcc53e MG |
1961 | } |
1962 | ||
439d473b ACM |
1963 | /* |
1964 | * Constructor variant for modules (where we know from /proc/modules where | |
1965 | * they are loaded) and for vmlinux, where only after we load all the | |
1966 | * symbols we'll know where it starts and ends. | |
1967 | */ | |
3610583c | 1968 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1969 | { |
aeafcbaf ACM |
1970 | struct map *map = calloc(1, (sizeof(*map) + |
1971 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
1972 | if (map != NULL) { | |
439d473b | 1973 | /* |
afb7b4f0 | 1974 | * ->end will be filled after we load all the symbols |
439d473b | 1975 | */ |
aeafcbaf | 1976 | map__init(map, type, start, 0, 0, dso); |
439d473b | 1977 | } |
afb7b4f0 | 1978 | |
aeafcbaf | 1979 | return map; |
439d473b ACM |
1980 | } |
1981 | ||
aeafcbaf | 1982 | struct map *machine__new_module(struct machine *machine, u64 start, |
d28c6223 | 1983 | const char *filename) |
b7cece76 ACM |
1984 | { |
1985 | struct map *map; | |
aeafcbaf | 1986 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
1987 | |
1988 | if (dso == NULL) | |
1989 | return NULL; | |
1990 | ||
1991 | map = map__new2(start, dso, MAP__FUNCTION); | |
1992 | if (map == NULL) | |
1993 | return NULL; | |
1994 | ||
aeafcbaf | 1995 | if (machine__is_host(machine)) |
878b439d | 1996 | dso->symtab_type = SYMTAB__SYSTEM_PATH_KMODULE; |
a1645ce1 | 1997 | else |
878b439d | 1998 | dso->symtab_type = SYMTAB__GUEST_KMODULE; |
aeafcbaf | 1999 | map_groups__insert(&machine->kmaps, map); |
b7cece76 ACM |
2000 | return map; |
2001 | } | |
2002 | ||
aeafcbaf | 2003 | static int machine__create_modules(struct machine *machine) |
439d473b ACM |
2004 | { |
2005 | char *line = NULL; | |
2006 | size_t n; | |
a1645ce1 | 2007 | FILE *file; |
439d473b | 2008 | struct map *map; |
a1645ce1 ZY |
2009 | const char *modules; |
2010 | char path[PATH_MAX]; | |
2011 | ||
aeafcbaf | 2012 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
2013 | modules = symbol_conf.default_guest_modules; |
2014 | else { | |
aeafcbaf | 2015 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
2016 | modules = path; |
2017 | } | |
6cfcc53e | 2018 | |
ec80fde7 ACM |
2019 | if (symbol__restricted_filename(path, "/proc/modules")) |
2020 | return -1; | |
2021 | ||
a1645ce1 | 2022 | file = fopen(modules, "r"); |
439d473b ACM |
2023 | if (file == NULL) |
2024 | return -1; | |
6cfcc53e | 2025 | |
439d473b ACM |
2026 | while (!feof(file)) { |
2027 | char name[PATH_MAX]; | |
2028 | u64 start; | |
439d473b ACM |
2029 | char *sep; |
2030 | int line_len; | |
6cfcc53e | 2031 | |
439d473b ACM |
2032 | line_len = getline(&line, &n, file); |
2033 | if (line_len < 0) | |
2034 | break; | |
2035 | ||
2036 | if (!line) | |
2037 | goto out_failure; | |
2038 | ||
2039 | line[--line_len] = '\0'; /* \n */ | |
2040 | ||
2041 | sep = strrchr(line, 'x'); | |
2042 | if (sep == NULL) | |
2043 | continue; | |
2044 | ||
2045 | hex2u64(sep + 1, &start); | |
2046 | ||
2047 | sep = strchr(line, ' '); | |
2048 | if (sep == NULL) | |
2049 | continue; | |
2050 | ||
2051 | *sep = '\0'; | |
2052 | ||
2053 | snprintf(name, sizeof(name), "[%s]", line); | |
aeafcbaf | 2054 | map = machine__new_module(machine, start, name); |
b7cece76 | 2055 | if (map == NULL) |
439d473b | 2056 | goto out_delete_line; |
aeafcbaf | 2057 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
6cfcc53e | 2058 | } |
439d473b ACM |
2059 | |
2060 | free(line); | |
2061 | fclose(file); | |
2062 | ||
aeafcbaf | 2063 | return machine__set_modules_path(machine); |
439d473b ACM |
2064 | |
2065 | out_delete_line: | |
2066 | free(line); | |
2067 | out_failure: | |
2068 | return -1; | |
6cfcc53e MG |
2069 | } |
2070 | ||
aeafcbaf | 2071 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 2072 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 2073 | { |
fbd733b8 | 2074 | int err = -1, fd; |
ec5761ea | 2075 | char symfs_vmlinux[PATH_MAX]; |
a2928c42 | 2076 | |
a639dc64 | 2077 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea DA |
2078 | symbol_conf.symfs, vmlinux); |
2079 | fd = open(symfs_vmlinux, O_RDONLY); | |
a2928c42 ACM |
2080 | if (fd < 0) |
2081 | return -1; | |
2082 | ||
aeafcbaf ACM |
2083 | dso__set_long_name(dso, (char *)vmlinux); |
2084 | dso__set_loaded(dso, map->type); | |
2085 | err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0); | |
a2928c42 ACM |
2086 | close(fd); |
2087 | ||
3846df2e | 2088 | if (err > 0) |
ec5761ea | 2089 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
3846df2e | 2090 | |
a2928c42 ACM |
2091 | return err; |
2092 | } | |
2093 | ||
aeafcbaf | 2094 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 2095 | symbol_filter_t filter) |
a19afe46 ACM |
2096 | { |
2097 | int i, err = 0; | |
5ad90e4e | 2098 | char *filename; |
a19afe46 ACM |
2099 | |
2100 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
2101 | vmlinux_path__nr_entries + 1); |
2102 | ||
aeafcbaf | 2103 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 2104 | if (filename != NULL) { |
aeafcbaf | 2105 | err = dso__load_vmlinux(dso, map, filename, filter); |
5ad90e4e | 2106 | if (err > 0) { |
aeafcbaf | 2107 | dso__set_long_name(dso, filename); |
5ad90e4e ACM |
2108 | goto out; |
2109 | } | |
2110 | free(filename); | |
2111 | } | |
a19afe46 ACM |
2112 | |
2113 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 2114 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 2115 | if (err > 0) { |
aeafcbaf | 2116 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
a19afe46 ACM |
2117 | break; |
2118 | } | |
2119 | } | |
5ad90e4e | 2120 | out: |
a19afe46 ACM |
2121 | return err; |
2122 | } | |
2123 | ||
aeafcbaf | 2124 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 2125 | symbol_filter_t filter) |
a827c875 | 2126 | { |
cc612d81 | 2127 | int err; |
9e201442 ACM |
2128 | const char *kallsyms_filename = NULL; |
2129 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 2130 | /* |
b226a5a7 DA |
2131 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
2132 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
2133 | * |
2134 | * For instance, try to analyse an ARM perf.data file _without_ a | |
2135 | * build-id, or if the user specifies the wrong path to the right | |
2136 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
2137 | * x86_86 one, on the machine where analysis is being performed, say), | |
2138 | * or worse, /proc/kallsyms. | |
2139 | * | |
2140 | * If the specified file _has_ a build-id and there is a build-id | |
2141 | * section in the perf.data file, we will still do the expected | |
2142 | * validation in dso__load_vmlinux and will bail out if they don't | |
2143 | * match. | |
2144 | */ | |
b226a5a7 DA |
2145 | if (symbol_conf.kallsyms_name != NULL) { |
2146 | kallsyms_filename = symbol_conf.kallsyms_name; | |
2147 | goto do_kallsyms; | |
2148 | } | |
2149 | ||
dc8d6ab2 | 2150 | if (symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 2151 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 2152 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 2153 | if (err > 0) { |
aeafcbaf | 2154 | dso__set_long_name(dso, |
e7dadc00 ACM |
2155 | strdup(symbol_conf.vmlinux_name)); |
2156 | goto out_fixup; | |
2157 | } | |
2158 | return err; | |
dc8d6ab2 | 2159 | } |
cc612d81 ACM |
2160 | |
2161 | if (vmlinux_path != NULL) { | |
aeafcbaf | 2162 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 ACM |
2163 | if (err > 0) |
2164 | goto out_fixup; | |
cc612d81 ACM |
2165 | } |
2166 | ||
ec5761ea DA |
2167 | /* do not try local files if a symfs was given */ |
2168 | if (symbol_conf.symfs[0] != 0) | |
2169 | return -1; | |
2170 | ||
b7cece76 ACM |
2171 | /* |
2172 | * Say the kernel DSO was created when processing the build-id header table, | |
2173 | * we have a build-id, so check if it is the same as the running kernel, | |
2174 | * using it if it is. | |
2175 | */ | |
aeafcbaf | 2176 | if (dso->has_build_id) { |
b7cece76 | 2177 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 2178 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
2179 | |
2180 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 2181 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 2182 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 2183 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 2184 | goto do_kallsyms; |
9e201442 | 2185 | } |
8d0591f6 | 2186 | } |
dc8d6ab2 ACM |
2187 | /* |
2188 | * Now look if we have it on the build-id cache in | |
2189 | * $HOME/.debug/[kernel.kallsyms]. | |
2190 | */ | |
aeafcbaf | 2191 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
2192 | sbuild_id); |
2193 | ||
2194 | if (asprintf(&kallsyms_allocated_filename, | |
2195 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
2196 | getenv("HOME"), sbuild_id) == -1) { |
2197 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 2198 | return -1; |
3846df2e | 2199 | } |
dc8d6ab2 | 2200 | |
19fc2ded ACM |
2201 | kallsyms_filename = kallsyms_allocated_filename; |
2202 | ||
dc8d6ab2 | 2203 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
2204 | pr_err("No kallsyms or vmlinux with build-id %s " |
2205 | "was found\n", sbuild_id); | |
9e201442 | 2206 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 2207 | return -1; |
9e201442 | 2208 | } |
dc8d6ab2 ACM |
2209 | } else { |
2210 | /* | |
2211 | * Last resort, if we don't have a build-id and couldn't find | |
2212 | * any vmlinux file, try the running kernel kallsyms table. | |
2213 | */ | |
9e201442 | 2214 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 2215 | } |
439d473b | 2216 | |
cc612d81 | 2217 | do_kallsyms: |
aeafcbaf | 2218 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
2219 | if (err > 0) |
2220 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2221 | free(kallsyms_allocated_filename); |
439d473b ACM |
2222 | |
2223 | if (err > 0) { | |
cc612d81 | 2224 | out_fixup: |
e1c7c6a4 | 2225 | if (kallsyms_filename != NULL) |
aeafcbaf | 2226 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
2227 | map__fixup_start(map); |
2228 | map__fixup_end(map); | |
439d473b | 2229 | } |
94cb9e38 | 2230 | |
a827c875 ACM |
2231 | return err; |
2232 | } | |
2233 | ||
aeafcbaf ACM |
2234 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
2235 | symbol_filter_t filter) | |
a1645ce1 ZY |
2236 | { |
2237 | int err; | |
2238 | const char *kallsyms_filename = NULL; | |
23346f21 | 2239 | struct machine *machine; |
a1645ce1 ZY |
2240 | char path[PATH_MAX]; |
2241 | ||
2242 | if (!map->groups) { | |
2243 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
2244 | return -1; | |
2245 | } | |
23346f21 | 2246 | machine = map->groups->machine; |
a1645ce1 | 2247 | |
23346f21 | 2248 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2249 | /* |
2250 | * if the user specified a vmlinux filename, use it and only | |
2251 | * it, reporting errors to the user if it cannot be used. | |
2252 | * Or use file guest_kallsyms inputted by user on commandline | |
2253 | */ | |
2254 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2255 | err = dso__load_vmlinux(dso, map, |
a1645ce1 ZY |
2256 | symbol_conf.default_guest_vmlinux_name, filter); |
2257 | goto out_try_fixup; | |
2258 | } | |
2259 | ||
2260 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2261 | if (!kallsyms_filename) | |
2262 | return -1; | |
2263 | } else { | |
23346f21 | 2264 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2265 | kallsyms_filename = path; |
2266 | } | |
2267 | ||
aeafcbaf | 2268 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
a1645ce1 ZY |
2269 | if (err > 0) |
2270 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
2271 | ||
2272 | out_try_fixup: | |
2273 | if (err > 0) { | |
2274 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 2275 | machine__mmap_name(machine, path, sizeof(path)); |
aeafcbaf | 2276 | dso__set_long_name(dso, strdup(path)); |
a1645ce1 ZY |
2277 | } |
2278 | map__fixup_start(map); | |
2279 | map__fixup_end(map); | |
2280 | } | |
2281 | ||
2282 | return err; | |
2283 | } | |
cd84c2ac | 2284 | |
b0da954a | 2285 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 2286 | { |
b0da954a | 2287 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
2288 | } |
2289 | ||
b0da954a | 2290 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
2291 | { |
2292 | struct dso *pos; | |
2293 | ||
b0da954a | 2294 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 2295 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
2296 | return pos; |
2297 | return NULL; | |
2298 | } | |
2299 | ||
a89e5abe | 2300 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2301 | { |
a89e5abe | 2302 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2303 | |
e4204992 | 2304 | if (!dso) { |
00a192b3 | 2305 | dso = dso__new(name); |
cfc10d3b | 2306 | if (dso != NULL) { |
a89e5abe | 2307 | dsos__add(head, dso); |
cfc10d3b ACM |
2308 | dso__set_basename(dso); |
2309 | } | |
66bd8424 | 2310 | } |
cd84c2ac FW |
2311 | |
2312 | return dso; | |
cd84c2ac FW |
2313 | } |
2314 | ||
1f626bc3 | 2315 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2316 | { |
2317 | struct dso *pos; | |
cbf69680 | 2318 | size_t ret = 0; |
cd84c2ac | 2319 | |
95011c60 ACM |
2320 | list_for_each_entry(pos, head, node) { |
2321 | int i; | |
2322 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2323 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2324 | } |
cbf69680 ACM |
2325 | |
2326 | return ret; | |
cd84c2ac FW |
2327 | } |
2328 | ||
aeafcbaf | 2329 | size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp) |
b0da954a | 2330 | { |
a1645ce1 | 2331 | struct rb_node *nd; |
cbf69680 | 2332 | size_t ret = 0; |
a1645ce1 | 2333 | |
aeafcbaf | 2334 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2335 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2336 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2337 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2338 | } |
cbf69680 ACM |
2339 | |
2340 | return ret; | |
b0da954a ACM |
2341 | } |
2342 | ||
88d3d9b7 ACM |
2343 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2344 | bool with_hits) | |
9e03eb2d ACM |
2345 | { |
2346 | struct dso *pos; | |
2347 | size_t ret = 0; | |
2348 | ||
b0da954a | 2349 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2350 | if (with_hits && !pos->hit) |
2351 | continue; | |
9e03eb2d | 2352 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2353 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2354 | } |
2355 | return ret; | |
2356 | } | |
2357 | ||
aeafcbaf ACM |
2358 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
2359 | bool with_hits) | |
f869097e | 2360 | { |
aeafcbaf ACM |
2361 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) + |
2362 | __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits); | |
f869097e ACM |
2363 | } |
2364 | ||
aeafcbaf ACM |
2365 | size_t machines__fprintf_dsos_buildid(struct rb_root *machines, |
2366 | FILE *fp, bool with_hits) | |
b0da954a | 2367 | { |
a1645ce1 ZY |
2368 | struct rb_node *nd; |
2369 | size_t ret = 0; | |
2370 | ||
aeafcbaf | 2371 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2372 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2373 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2374 | } |
2375 | return ret; | |
b0da954a ACM |
2376 | } |
2377 | ||
f57b05ed JO |
2378 | static struct dso* |
2379 | dso__kernel_findnew(struct machine *machine, const char *name, | |
2380 | const char *short_name, int dso_type) | |
fd1d908c | 2381 | { |
f57b05ed JO |
2382 | /* |
2383 | * The kernel dso could be created by build_id processing. | |
2384 | */ | |
2385 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
a1645ce1 | 2386 | |
f57b05ed JO |
2387 | /* |
2388 | * We need to run this in all cases, since during the build_id | |
2389 | * processing we had no idea this was the kernel dso. | |
2390 | */ | |
aeafcbaf | 2391 | if (dso != NULL) { |
f57b05ed JO |
2392 | dso__set_short_name(dso, short_name); |
2393 | dso->kernel = dso_type; | |
fd1d908c ACM |
2394 | } |
2395 | ||
aeafcbaf | 2396 | return dso; |
fd1d908c ACM |
2397 | } |
2398 | ||
aeafcbaf | 2399 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
fd1d908c | 2400 | { |
a1645ce1 ZY |
2401 | char path[PATH_MAX]; |
2402 | ||
23346f21 | 2403 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2404 | return; |
23346f21 | 2405 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
aeafcbaf ACM |
2406 | if (sysfs__read_build_id(path, dso->build_id, |
2407 | sizeof(dso->build_id)) == 0) | |
2408 | dso->has_build_id = true; | |
fd1d908c ACM |
2409 | } |
2410 | ||
f57b05ed | 2411 | static struct dso *machine__get_kernel(struct machine *machine) |
cd84c2ac | 2412 | { |
a1645ce1 ZY |
2413 | const char *vmlinux_name = NULL; |
2414 | struct dso *kernel; | |
cd84c2ac | 2415 | |
aeafcbaf | 2416 | if (machine__is_host(machine)) { |
a1645ce1 | 2417 | vmlinux_name = symbol_conf.vmlinux_name; |
f57b05ed JO |
2418 | if (!vmlinux_name) |
2419 | vmlinux_name = "[kernel.kallsyms]"; | |
2420 | ||
2421 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2422 | "[kernel]", | |
2423 | DSO_TYPE_KERNEL); | |
a1645ce1 | 2424 | } else { |
f57b05ed JO |
2425 | char bf[PATH_MAX]; |
2426 | ||
aeafcbaf | 2427 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2428 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
f57b05ed JO |
2429 | if (!vmlinux_name) |
2430 | vmlinux_name = machine__mmap_name(machine, bf, | |
2431 | sizeof(bf)); | |
2432 | ||
2433 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2434 | "[guest.kernel]", | |
2435 | DSO_TYPE_GUEST_KERNEL); | |
8d92c02a | 2436 | } |
cd84c2ac | 2437 | |
f57b05ed | 2438 | if (kernel != NULL && (!kernel->has_build_id)) |
aeafcbaf | 2439 | dso__read_running_kernel_build_id(kernel, machine); |
f57b05ed | 2440 | |
f1dfa0b1 | 2441 | return kernel; |
f1dfa0b1 ACM |
2442 | } |
2443 | ||
d214afbd ML |
2444 | struct process_args { |
2445 | u64 start; | |
2446 | }; | |
2447 | ||
2448 | static int symbol__in_kernel(void *arg, const char *name, | |
3b01a413 | 2449 | char type __used, u64 start, u64 end __used) |
d214afbd ML |
2450 | { |
2451 | struct process_args *args = arg; | |
2452 | ||
2453 | if (strchr(name, '[')) | |
2454 | return 0; | |
2455 | ||
2456 | args->start = start; | |
2457 | return 1; | |
2458 | } | |
2459 | ||
2460 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
2461 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
2462 | { | |
2463 | const char *filename; | |
2464 | char path[PATH_MAX]; | |
2465 | struct process_args args; | |
2466 | ||
2467 | if (machine__is_host(machine)) { | |
2468 | filename = "/proc/kallsyms"; | |
2469 | } else { | |
2470 | if (machine__is_default_guest(machine)) | |
2471 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
2472 | else { | |
2473 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
2474 | filename = path; | |
2475 | } | |
2476 | } | |
2477 | ||
ec80fde7 ACM |
2478 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
2479 | return 0; | |
2480 | ||
d214afbd ML |
2481 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
2482 | return 0; | |
2483 | ||
2484 | return args.start; | |
2485 | } | |
2486 | ||
aeafcbaf | 2487 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
f1dfa0b1 | 2488 | { |
de176489 | 2489 | enum map_type type; |
aeafcbaf | 2490 | u64 start = machine__get_kernel_start_addr(machine); |
f1dfa0b1 | 2491 | |
de176489 | 2492 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2493 | struct kmap *kmap; |
2494 | ||
aeafcbaf ACM |
2495 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
2496 | if (machine->vmlinux_maps[type] == NULL) | |
de176489 | 2497 | return -1; |
f1dfa0b1 | 2498 | |
aeafcbaf ACM |
2499 | machine->vmlinux_maps[type]->map_ip = |
2500 | machine->vmlinux_maps[type]->unmap_ip = | |
2501 | identity__map_ip; | |
2502 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
2503 | kmap->kmaps = &machine->kmaps; | |
2504 | map_groups__insert(&machine->kmaps, | |
2505 | machine->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2506 | } |
2507 | ||
f1dfa0b1 | 2508 | return 0; |
2446042c ACM |
2509 | } |
2510 | ||
aeafcbaf | 2511 | void machine__destroy_kernel_maps(struct machine *machine) |
076c6e45 ACM |
2512 | { |
2513 | enum map_type type; | |
2514 | ||
2515 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2516 | struct kmap *kmap; | |
2517 | ||
aeafcbaf | 2518 | if (machine->vmlinux_maps[type] == NULL) |
076c6e45 ACM |
2519 | continue; |
2520 | ||
aeafcbaf ACM |
2521 | kmap = map__kmap(machine->vmlinux_maps[type]); |
2522 | map_groups__remove(&machine->kmaps, | |
2523 | machine->vmlinux_maps[type]); | |
076c6e45 ACM |
2524 | if (kmap->ref_reloc_sym) { |
2525 | /* | |
2526 | * ref_reloc_sym is shared among all maps, so free just | |
2527 | * on one of them. | |
2528 | */ | |
2529 | if (type == MAP__FUNCTION) { | |
2530 | free((char *)kmap->ref_reloc_sym->name); | |
2531 | kmap->ref_reloc_sym->name = NULL; | |
2532 | free(kmap->ref_reloc_sym); | |
2533 | } | |
2534 | kmap->ref_reloc_sym = NULL; | |
2535 | } | |
2536 | ||
aeafcbaf ACM |
2537 | map__delete(machine->vmlinux_maps[type]); |
2538 | machine->vmlinux_maps[type] = NULL; | |
076c6e45 ACM |
2539 | } |
2540 | } | |
2541 | ||
aeafcbaf | 2542 | int machine__create_kernel_maps(struct machine *machine) |
5c0541d5 | 2543 | { |
f57b05ed | 2544 | struct dso *kernel = machine__get_kernel(machine); |
5c0541d5 ACM |
2545 | |
2546 | if (kernel == NULL || | |
aeafcbaf | 2547 | __machine__create_kernel_maps(machine, kernel) < 0) |
5c0541d5 ACM |
2548 | return -1; |
2549 | ||
aeafcbaf | 2550 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) |
5c0541d5 ACM |
2551 | pr_debug("Problems creating module maps, continuing anyway...\n"); |
2552 | /* | |
2553 | * Now that we have all the maps created, just set the ->end of them: | |
2554 | */ | |
aeafcbaf | 2555 | map_groups__fixup_end(&machine->kmaps); |
5c0541d5 ACM |
2556 | return 0; |
2557 | } | |
2558 | ||
cc612d81 ACM |
2559 | static void vmlinux_path__exit(void) |
2560 | { | |
2561 | while (--vmlinux_path__nr_entries >= 0) { | |
2562 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2563 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2564 | } | |
2565 | ||
2566 | free(vmlinux_path); | |
2567 | vmlinux_path = NULL; | |
2568 | } | |
2569 | ||
2570 | static int vmlinux_path__init(void) | |
2571 | { | |
2572 | struct utsname uts; | |
2573 | char bf[PATH_MAX]; | |
2574 | ||
cc612d81 ACM |
2575 | vmlinux_path = malloc(sizeof(char *) * 5); |
2576 | if (vmlinux_path == NULL) | |
2577 | return -1; | |
2578 | ||
2579 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2580 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2581 | goto out_fail; | |
2582 | ++vmlinux_path__nr_entries; | |
2583 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2584 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2585 | goto out_fail; | |
2586 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
2587 | |
2588 | /* only try running kernel version if no symfs was given */ | |
2589 | if (symbol_conf.symfs[0] != 0) | |
2590 | return 0; | |
2591 | ||
2592 | if (uname(&uts) < 0) | |
2593 | return -1; | |
2594 | ||
cc612d81 ACM |
2595 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
2596 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2597 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2598 | goto out_fail; | |
2599 | ++vmlinux_path__nr_entries; | |
2600 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2601 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2602 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2603 | goto out_fail; | |
2604 | ++vmlinux_path__nr_entries; | |
2605 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2606 | uts.release); | |
2607 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2608 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2609 | goto out_fail; | |
2610 | ++vmlinux_path__nr_entries; | |
2611 | ||
2612 | return 0; | |
2613 | ||
2614 | out_fail: | |
2615 | vmlinux_path__exit(); | |
2616 | return -1; | |
2617 | } | |
2618 | ||
aeafcbaf | 2619 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
b0a9ab62 ACM |
2620 | { |
2621 | int i; | |
2622 | size_t printed = 0; | |
aeafcbaf | 2623 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
5ad90e4e ACM |
2624 | |
2625 | if (kdso->has_build_id) { | |
2626 | char filename[PATH_MAX]; | |
2627 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2628 | printed += fprintf(fp, "[0] %s\n", filename); | |
2629 | } | |
b0a9ab62 ACM |
2630 | |
2631 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2632 | printed += fprintf(fp, "[%d] %s\n", |
2633 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2634 | |
2635 | return printed; | |
2636 | } | |
2637 | ||
655000e7 ACM |
2638 | static int setup_list(struct strlist **list, const char *list_str, |
2639 | const char *list_name) | |
2640 | { | |
2641 | if (list_str == NULL) | |
2642 | return 0; | |
2643 | ||
2644 | *list = strlist__new(true, list_str); | |
2645 | if (!*list) { | |
2646 | pr_err("problems parsing %s list\n", list_name); | |
2647 | return -1; | |
2648 | } | |
2649 | return 0; | |
2650 | } | |
2651 | ||
ec80fde7 ACM |
2652 | static bool symbol__read_kptr_restrict(void) |
2653 | { | |
2654 | bool value = false; | |
2655 | ||
2656 | if (geteuid() != 0) { | |
2657 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
2658 | if (fp != NULL) { | |
2659 | char line[8]; | |
2660 | ||
2661 | if (fgets(line, sizeof(line), fp) != NULL) | |
2662 | value = atoi(line) != 0; | |
2663 | ||
2664 | fclose(fp); | |
2665 | } | |
2666 | } | |
2667 | ||
2668 | return value; | |
2669 | } | |
2670 | ||
75be6cf4 | 2671 | int symbol__init(void) |
2446042c | 2672 | { |
ec5761ea DA |
2673 | const char *symfs; |
2674 | ||
85e00b55 JZ |
2675 | if (symbol_conf.initialized) |
2676 | return 0; | |
2677 | ||
4d439517 DM |
2678 | symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); |
2679 | ||
95011c60 | 2680 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2681 | if (symbol_conf.sort_by_name) |
2682 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2683 | sizeof(struct symbol)); | |
b32d133a | 2684 | |
75be6cf4 | 2685 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2686 | return -1; |
2687 | ||
c410a338 ACM |
2688 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2689 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2690 | return -1; | |
2691 | } | |
2692 | ||
655000e7 ACM |
2693 | if (setup_list(&symbol_conf.dso_list, |
2694 | symbol_conf.dso_list_str, "dso") < 0) | |
2695 | return -1; | |
2696 | ||
2697 | if (setup_list(&symbol_conf.comm_list, | |
2698 | symbol_conf.comm_list_str, "comm") < 0) | |
2699 | goto out_free_dso_list; | |
2700 | ||
2701 | if (setup_list(&symbol_conf.sym_list, | |
2702 | symbol_conf.sym_list_str, "symbol") < 0) | |
2703 | goto out_free_comm_list; | |
2704 | ||
ec5761ea DA |
2705 | /* |
2706 | * A path to symbols of "/" is identical to "" | |
2707 | * reset here for simplicity. | |
2708 | */ | |
2709 | symfs = realpath(symbol_conf.symfs, NULL); | |
2710 | if (symfs == NULL) | |
2711 | symfs = symbol_conf.symfs; | |
2712 | if (strcmp(symfs, "/") == 0) | |
2713 | symbol_conf.symfs = ""; | |
2714 | if (symfs != symbol_conf.symfs) | |
2715 | free((void *)symfs); | |
2716 | ||
ec80fde7 ACM |
2717 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2718 | ||
85e00b55 | 2719 | symbol_conf.initialized = true; |
4aa65636 | 2720 | return 0; |
655000e7 | 2721 | |
655000e7 ACM |
2722 | out_free_comm_list: |
2723 | strlist__delete(symbol_conf.comm_list); | |
d74c896b NK |
2724 | out_free_dso_list: |
2725 | strlist__delete(symbol_conf.dso_list); | |
655000e7 | 2726 | return -1; |
4aa65636 ACM |
2727 | } |
2728 | ||
d65a458b ACM |
2729 | void symbol__exit(void) |
2730 | { | |
85e00b55 JZ |
2731 | if (!symbol_conf.initialized) |
2732 | return; | |
d65a458b ACM |
2733 | strlist__delete(symbol_conf.sym_list); |
2734 | strlist__delete(symbol_conf.dso_list); | |
2735 | strlist__delete(symbol_conf.comm_list); | |
2736 | vmlinux_path__exit(); | |
2737 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2738 | symbol_conf.initialized = false; |
d65a458b ACM |
2739 | } |
2740 | ||
aeafcbaf | 2741 | int machines__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2742 | { |
aeafcbaf | 2743 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2744 | |
23346f21 | 2745 | if (machine == NULL) |
a1645ce1 | 2746 | return -1; |
cc612d81 | 2747 | |
5c0541d5 | 2748 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2749 | } |
5aab621b ACM |
2750 | |
2751 | static int hex(char ch) | |
2752 | { | |
2753 | if ((ch >= '0') && (ch <= '9')) | |
2754 | return ch - '0'; | |
2755 | if ((ch >= 'a') && (ch <= 'f')) | |
2756 | return ch - 'a' + 10; | |
2757 | if ((ch >= 'A') && (ch <= 'F')) | |
2758 | return ch - 'A' + 10; | |
2759 | return -1; | |
2760 | } | |
2761 | ||
2762 | /* | |
2763 | * While we find nice hex chars, build a long_val. | |
2764 | * Return number of chars processed. | |
2765 | */ | |
2766 | int hex2u64(const char *ptr, u64 *long_val) | |
2767 | { | |
2768 | const char *p = ptr; | |
2769 | *long_val = 0; | |
2770 | ||
2771 | while (*p) { | |
2772 | const int hex_val = hex(*p); | |
2773 | ||
2774 | if (hex_val < 0) | |
2775 | break; | |
2776 | ||
2777 | *long_val = (*long_val << 4) | hex_val; | |
2778 | p++; | |
2779 | } | |
2780 | ||
2781 | return p - ptr; | |
2782 | } | |
2783 | ||
2784 | char *strxfrchar(char *s, char from, char to) | |
2785 | { | |
2786 | char *p = s; | |
2787 | ||
2788 | while ((p = strchr(p, from)) != NULL) | |
2789 | *p++ = to; | |
2790 | ||
2791 | return s; | |
2792 | } | |
a1645ce1 | 2793 | |
aeafcbaf | 2794 | int machines__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2795 | { |
2796 | int ret = 0; | |
2797 | struct dirent **namelist = NULL; | |
2798 | int i, items = 0; | |
2799 | char path[PATH_MAX]; | |
2800 | pid_t pid; | |
2801 | ||
2802 | if (symbol_conf.default_guest_vmlinux_name || | |
2803 | symbol_conf.default_guest_modules || | |
2804 | symbol_conf.default_guest_kallsyms) { | |
aeafcbaf | 2805 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2806 | } |
2807 | ||
2808 | if (symbol_conf.guestmount) { | |
2809 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2810 | if (items <= 0) | |
2811 | return -ENOENT; | |
2812 | for (i = 0; i < items; i++) { | |
2813 | if (!isdigit(namelist[i]->d_name[0])) { | |
2814 | /* Filter out . and .. */ | |
2815 | continue; | |
2816 | } | |
2817 | pid = atoi(namelist[i]->d_name); | |
2818 | sprintf(path, "%s/%s/proc/kallsyms", | |
2819 | symbol_conf.guestmount, | |
2820 | namelist[i]->d_name); | |
2821 | ret = access(path, R_OK); | |
2822 | if (ret) { | |
2823 | pr_debug("Can't access file %s\n", path); | |
2824 | goto failure; | |
2825 | } | |
aeafcbaf | 2826 | machines__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2827 | } |
2828 | failure: | |
2829 | free(namelist); | |
2830 | } | |
2831 | ||
2832 | return ret; | |
2833 | } | |
5c0541d5 | 2834 | |
aeafcbaf | 2835 | void machines__destroy_guest_kernel_maps(struct rb_root *machines) |
076c6e45 | 2836 | { |
aeafcbaf | 2837 | struct rb_node *next = rb_first(machines); |
076c6e45 ACM |
2838 | |
2839 | while (next) { | |
2840 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2841 | ||
2842 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 2843 | rb_erase(&pos->rb_node, machines); |
076c6e45 ACM |
2844 | machine__delete(pos); |
2845 | } | |
2846 | } | |
2847 | ||
aeafcbaf | 2848 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
5c0541d5 ACM |
2849 | enum map_type type, symbol_filter_t filter) |
2850 | { | |
aeafcbaf | 2851 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2852 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
2853 | ||
2854 | if (ret > 0) { | |
2855 | dso__set_loaded(map->dso, type); | |
2856 | /* | |
2857 | * Since /proc/kallsyms will have multiple sessions for the | |
2858 | * kernel, with modules between them, fixup the end of all | |
2859 | * sections. | |
2860 | */ | |
aeafcbaf | 2861 | __map_groups__fixup_end(&machine->kmaps, type); |
5c0541d5 ACM |
2862 | } |
2863 | ||
2864 | return ret; | |
2865 | } | |
2866 | ||
aeafcbaf | 2867 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
5c0541d5 ACM |
2868 | symbol_filter_t filter) |
2869 | { | |
aeafcbaf | 2870 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2871 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
2872 | ||
2873 | if (ret > 0) { | |
2874 | dso__set_loaded(map->dso, type); | |
2875 | map__reloc_vmlinux(map); | |
2876 | } | |
2877 | ||
2878 | return ret; | |
2879 | } | |
225466f1 SD |
2880 | |
2881 | struct map *dso__new_map(const char *name) | |
2882 | { | |
378474e4 | 2883 | struct map *map = NULL; |
225466f1 | 2884 | struct dso *dso = dso__new(name); |
378474e4 SD |
2885 | |
2886 | if (dso) | |
2887 | map = map__new2(0, dso, MAP__FUNCTION); | |
225466f1 SD |
2888 | |
2889 | return map; | |
2890 | } |