Commit | Line | Data |
---|---|---|
5aab621b ACM |
1 | #define _GNU_SOURCE |
2 | #include <ctype.h> | |
3 | #include <dirent.h> | |
4 | #include <errno.h> | |
5 | #include <libgen.h> | |
6 | #include <stdlib.h> | |
7 | #include <stdio.h> | |
8 | #include <string.h> | |
9 | #include <sys/types.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/param.h> | |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
9486aa38 | 14 | #include <inttypes.h> |
b36f19d5 | 15 | #include "build-id.h" |
8a6c5b26 | 16 | #include "debug.h" |
a2928c42 | 17 | #include "symbol.h" |
5aab621b | 18 | #include "strlist.h" |
a2928c42 ACM |
19 | |
20 | #include <libelf.h> | |
21 | #include <gelf.h> | |
22 | #include <elf.h> | |
f1617b40 | 23 | #include <limits.h> |
439d473b | 24 | #include <sys/utsname.h> |
2cdbc46d | 25 | |
3b01a413 ACM |
26 | #ifndef KSYM_NAME_LEN |
27 | #define KSYM_NAME_LEN 128 | |
28 | #endif | |
29 | ||
c12e15e7 ACM |
30 | #ifndef NT_GNU_BUILD_ID |
31 | #define NT_GNU_BUILD_ID 3 | |
32 | #endif | |
33 | ||
aeafcbaf | 34 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id); |
21916c38 | 35 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); |
b0da954a | 36 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 37 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
aeafcbaf | 38 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 39 | symbol_filter_t filter); |
aeafcbaf | 40 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
a1645ce1 | 41 | symbol_filter_t filter); |
cc612d81 ACM |
42 | static int vmlinux_path__nr_entries; |
43 | static char **vmlinux_path; | |
439d473b | 44 | |
75be6cf4 | 45 | struct symbol_conf symbol_conf = { |
d599db3f | 46 | .exclude_other = true, |
b32d133a ACM |
47 | .use_modules = true, |
48 | .try_vmlinux_path = true, | |
ec5761ea | 49 | .symfs = "", |
b32d133a ACM |
50 | }; |
51 | ||
aeafcbaf | 52 | int dso__name_len(const struct dso *dso) |
8a6c5b26 ACM |
53 | { |
54 | if (verbose) | |
aeafcbaf | 55 | return dso->long_name_len; |
8a6c5b26 | 56 | |
aeafcbaf | 57 | return dso->short_name_len; |
8a6c5b26 ACM |
58 | } |
59 | ||
aeafcbaf | 60 | bool dso__loaded(const struct dso *dso, enum map_type type) |
3610583c | 61 | { |
aeafcbaf | 62 | return dso->loaded & (1 << type); |
3610583c ACM |
63 | } |
64 | ||
aeafcbaf | 65 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) |
79406cd7 | 66 | { |
aeafcbaf | 67 | return dso->sorted_by_name & (1 << type); |
79406cd7 ACM |
68 | } |
69 | ||
aeafcbaf | 70 | static void dso__set_sorted_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 71 | { |
aeafcbaf | 72 | dso->sorted_by_name |= (1 << type); |
79406cd7 ACM |
73 | } |
74 | ||
36a3e646 | 75 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee ACM |
76 | { |
77 | switch (map_type) { | |
78 | case MAP__FUNCTION: | |
79 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
80 | case MAP__VARIABLE: |
81 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
82 | default: |
83 | return false; | |
84 | } | |
85 | } | |
86 | ||
aeafcbaf | 87 | static void symbols__fixup_end(struct rb_root *symbols) |
af427bf5 | 88 | { |
aeafcbaf | 89 | struct rb_node *nd, *prevnd = rb_first(symbols); |
2e538c4a | 90 | struct symbol *curr, *prev; |
af427bf5 ACM |
91 | |
92 | if (prevnd == NULL) | |
93 | return; | |
94 | ||
2e538c4a ACM |
95 | curr = rb_entry(prevnd, struct symbol, rb_node); |
96 | ||
af427bf5 | 97 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
98 | prev = curr; |
99 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 100 | |
3b01a413 | 101 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 102 | prev->end = curr->start - 1; |
af427bf5 | 103 | } |
2e538c4a ACM |
104 | |
105 | /* Last entry */ | |
106 | if (curr->end == curr->start) | |
107 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
108 | } |
109 | ||
aeafcbaf | 110 | static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) |
af427bf5 ACM |
111 | { |
112 | struct map *prev, *curr; | |
aeafcbaf | 113 | struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); |
af427bf5 ACM |
114 | |
115 | if (prevnd == NULL) | |
116 | return; | |
117 | ||
118 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
119 | |
120 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
121 | prev = curr; | |
122 | curr = rb_entry(nd, struct map, rb_node); | |
123 | prev->end = curr->start - 1; | |
2e538c4a | 124 | } |
90c83218 ACM |
125 | |
126 | /* | |
127 | * We still haven't the actual symbols, so guess the | |
128 | * last map final address. | |
129 | */ | |
9d1faba5 | 130 | curr->end = ~0ULL; |
af427bf5 ACM |
131 | } |
132 | ||
aeafcbaf | 133 | static void map_groups__fixup_end(struct map_groups *mg) |
23ea4a3f ACM |
134 | { |
135 | int i; | |
136 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf | 137 | __map_groups__fixup_end(mg, i); |
23ea4a3f ACM |
138 | } |
139 | ||
c408fedf ACM |
140 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
141 | const char *name) | |
a2928c42 | 142 | { |
0085c954 | 143 | size_t namelen = strlen(name) + 1; |
aeafcbaf ACM |
144 | struct symbol *sym = calloc(1, (symbol_conf.priv_size + |
145 | sizeof(*sym) + namelen)); | |
146 | if (sym == NULL) | |
0b73da3f IM |
147 | return NULL; |
148 | ||
75be6cf4 | 149 | if (symbol_conf.priv_size) |
aeafcbaf | 150 | sym = ((void *)sym) + symbol_conf.priv_size; |
e4204992 | 151 | |
aeafcbaf ACM |
152 | sym->start = start; |
153 | sym->end = len ? start + len - 1 : start; | |
154 | sym->binding = binding; | |
155 | sym->namelen = namelen - 1; | |
e4204992 | 156 | |
aeafcbaf ACM |
157 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", |
158 | __func__, name, start, sym->end); | |
159 | memcpy(sym->name, name, namelen); | |
a2928c42 | 160 | |
aeafcbaf | 161 | return sym; |
a2928c42 ACM |
162 | } |
163 | ||
aeafcbaf | 164 | void symbol__delete(struct symbol *sym) |
a2928c42 | 165 | { |
aeafcbaf | 166 | free(((void *)sym) - symbol_conf.priv_size); |
a2928c42 ACM |
167 | } |
168 | ||
aeafcbaf | 169 | static size_t symbol__fprintf(struct symbol *sym, FILE *fp) |
a2928c42 | 170 | { |
9486aa38 | 171 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
aeafcbaf ACM |
172 | sym->start, sym->end, |
173 | sym->binding == STB_GLOBAL ? 'g' : | |
174 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
175 | sym->name); | |
a2928c42 ACM |
176 | } |
177 | ||
aeafcbaf | 178 | void dso__set_long_name(struct dso *dso, char *name) |
cfc10d3b | 179 | { |
ef6ae724 ACM |
180 | if (name == NULL) |
181 | return; | |
aeafcbaf ACM |
182 | dso->long_name = name; |
183 | dso->long_name_len = strlen(name); | |
cfc10d3b ACM |
184 | } |
185 | ||
aeafcbaf | 186 | static void dso__set_short_name(struct dso *dso, const char *name) |
b63be8d7 ACM |
187 | { |
188 | if (name == NULL) | |
189 | return; | |
aeafcbaf ACM |
190 | dso->short_name = name; |
191 | dso->short_name_len = strlen(name); | |
b63be8d7 ACM |
192 | } |
193 | ||
aeafcbaf | 194 | static void dso__set_basename(struct dso *dso) |
cfc10d3b | 195 | { |
aeafcbaf | 196 | dso__set_short_name(dso, basename(dso->long_name)); |
cfc10d3b ACM |
197 | } |
198 | ||
00a192b3 | 199 | struct dso *dso__new(const char *name) |
a2928c42 | 200 | { |
aeafcbaf | 201 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
a2928c42 | 202 | |
aeafcbaf | 203 | if (dso != NULL) { |
6a4694a4 | 204 | int i; |
aeafcbaf ACM |
205 | strcpy(dso->name, name); |
206 | dso__set_long_name(dso, dso->name); | |
207 | dso__set_short_name(dso, dso->name); | |
6a4694a4 | 208 | for (i = 0; i < MAP__NR_TYPES; ++i) |
aeafcbaf ACM |
209 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; |
210 | dso->symtab_type = SYMTAB__NOT_FOUND; | |
211 | dso->loaded = 0; | |
212 | dso->sorted_by_name = 0; | |
213 | dso->has_build_id = 0; | |
214 | dso->kernel = DSO_TYPE_USER; | |
215 | INIT_LIST_HEAD(&dso->node); | |
a2928c42 ACM |
216 | } |
217 | ||
aeafcbaf | 218 | return dso; |
a2928c42 ACM |
219 | } |
220 | ||
aeafcbaf | 221 | static void symbols__delete(struct rb_root *symbols) |
a2928c42 ACM |
222 | { |
223 | struct symbol *pos; | |
aeafcbaf | 224 | struct rb_node *next = rb_first(symbols); |
a2928c42 ACM |
225 | |
226 | while (next) { | |
227 | pos = rb_entry(next, struct symbol, rb_node); | |
228 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 229 | rb_erase(&pos->rb_node, symbols); |
00a192b3 | 230 | symbol__delete(pos); |
a2928c42 ACM |
231 | } |
232 | } | |
233 | ||
aeafcbaf | 234 | void dso__delete(struct dso *dso) |
a2928c42 | 235 | { |
6a4694a4 ACM |
236 | int i; |
237 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
aeafcbaf ACM |
238 | symbols__delete(&dso->symbols[i]); |
239 | if (dso->sname_alloc) | |
240 | free((char *)dso->short_name); | |
241 | if (dso->lname_alloc) | |
242 | free(dso->long_name); | |
243 | free(dso); | |
a2928c42 ACM |
244 | } |
245 | ||
aeafcbaf | 246 | void dso__set_build_id(struct dso *dso, void *build_id) |
8d06367f | 247 | { |
aeafcbaf ACM |
248 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); |
249 | dso->has_build_id = 1; | |
8d06367f ACM |
250 | } |
251 | ||
aeafcbaf | 252 | static void symbols__insert(struct rb_root *symbols, struct symbol *sym) |
a2928c42 | 253 | { |
aeafcbaf | 254 | struct rb_node **p = &symbols->rb_node; |
a2928c42 | 255 | struct rb_node *parent = NULL; |
9cffa8d5 | 256 | const u64 ip = sym->start; |
a2928c42 ACM |
257 | struct symbol *s; |
258 | ||
259 | while (*p != NULL) { | |
260 | parent = *p; | |
261 | s = rb_entry(parent, struct symbol, rb_node); | |
262 | if (ip < s->start) | |
263 | p = &(*p)->rb_left; | |
264 | else | |
265 | p = &(*p)->rb_right; | |
266 | } | |
267 | rb_link_node(&sym->rb_node, parent, p); | |
aeafcbaf | 268 | rb_insert_color(&sym->rb_node, symbols); |
a2928c42 ACM |
269 | } |
270 | ||
aeafcbaf | 271 | static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) |
a2928c42 ACM |
272 | { |
273 | struct rb_node *n; | |
274 | ||
aeafcbaf | 275 | if (symbols == NULL) |
a2928c42 ACM |
276 | return NULL; |
277 | ||
aeafcbaf | 278 | n = symbols->rb_node; |
a2928c42 ACM |
279 | |
280 | while (n) { | |
281 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
282 | ||
283 | if (ip < s->start) | |
284 | n = n->rb_left; | |
285 | else if (ip > s->end) | |
286 | n = n->rb_right; | |
287 | else | |
288 | return s; | |
289 | } | |
290 | ||
291 | return NULL; | |
292 | } | |
293 | ||
79406cd7 ACM |
294 | struct symbol_name_rb_node { |
295 | struct rb_node rb_node; | |
296 | struct symbol sym; | |
297 | }; | |
298 | ||
aeafcbaf | 299 | static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) |
79406cd7 | 300 | { |
aeafcbaf | 301 | struct rb_node **p = &symbols->rb_node; |
79406cd7 | 302 | struct rb_node *parent = NULL; |
02a9d037 RV |
303 | struct symbol_name_rb_node *symn, *s; |
304 | ||
305 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
306 | |
307 | while (*p != NULL) { | |
308 | parent = *p; | |
309 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
310 | if (strcmp(sym->name, s->sym.name) < 0) | |
311 | p = &(*p)->rb_left; | |
312 | else | |
313 | p = &(*p)->rb_right; | |
314 | } | |
315 | rb_link_node(&symn->rb_node, parent, p); | |
aeafcbaf | 316 | rb_insert_color(&symn->rb_node, symbols); |
79406cd7 ACM |
317 | } |
318 | ||
aeafcbaf ACM |
319 | static void symbols__sort_by_name(struct rb_root *symbols, |
320 | struct rb_root *source) | |
79406cd7 ACM |
321 | { |
322 | struct rb_node *nd; | |
323 | ||
324 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
325 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
aeafcbaf | 326 | symbols__insert_by_name(symbols, pos); |
79406cd7 ACM |
327 | } |
328 | } | |
329 | ||
aeafcbaf ACM |
330 | static struct symbol *symbols__find_by_name(struct rb_root *symbols, |
331 | const char *name) | |
79406cd7 ACM |
332 | { |
333 | struct rb_node *n; | |
334 | ||
aeafcbaf | 335 | if (symbols == NULL) |
79406cd7 ACM |
336 | return NULL; |
337 | ||
aeafcbaf | 338 | n = symbols->rb_node; |
79406cd7 ACM |
339 | |
340 | while (n) { | |
341 | struct symbol_name_rb_node *s; | |
342 | int cmp; | |
343 | ||
344 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
345 | cmp = strcmp(name, s->sym.name); | |
346 | ||
347 | if (cmp < 0) | |
348 | n = n->rb_left; | |
349 | else if (cmp > 0) | |
350 | n = n->rb_right; | |
351 | else | |
352 | return &s->sym; | |
353 | } | |
354 | ||
355 | return NULL; | |
356 | } | |
357 | ||
aeafcbaf | 358 | struct symbol *dso__find_symbol(struct dso *dso, |
79406cd7 | 359 | enum map_type type, u64 addr) |
fcf1203a | 360 | { |
aeafcbaf | 361 | return symbols__find(&dso->symbols[type], addr); |
fcf1203a ACM |
362 | } |
363 | ||
aeafcbaf | 364 | struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, |
79406cd7 ACM |
365 | const char *name) |
366 | { | |
aeafcbaf | 367 | return symbols__find_by_name(&dso->symbol_names[type], name); |
79406cd7 ACM |
368 | } |
369 | ||
aeafcbaf | 370 | void dso__sort_by_name(struct dso *dso, enum map_type type) |
79406cd7 | 371 | { |
aeafcbaf ACM |
372 | dso__set_sorted_by_name(dso, type); |
373 | return symbols__sort_by_name(&dso->symbol_names[type], | |
374 | &dso->symbols[type]); | |
79406cd7 ACM |
375 | } |
376 | ||
aeafcbaf | 377 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
a2928c42 | 378 | { |
8d06367f | 379 | char *bid = bf; |
aeafcbaf | 380 | const u8 *raw = build_id; |
8d06367f | 381 | int i; |
a2928c42 | 382 | |
8d06367f ACM |
383 | for (i = 0; i < len; ++i) { |
384 | sprintf(bid, "%02x", *raw); | |
385 | ++raw; | |
386 | bid += 2; | |
387 | } | |
388 | ||
aeafcbaf | 389 | return raw - build_id; |
8d06367f ACM |
390 | } |
391 | ||
aeafcbaf | 392 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
8d06367f ACM |
393 | { |
394 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f | 395 | |
aeafcbaf | 396 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
9e03eb2d ACM |
397 | return fprintf(fp, "%s", sbuild_id); |
398 | } | |
399 | ||
aeafcbaf ACM |
400 | size_t dso__fprintf_symbols_by_name(struct dso *dso, |
401 | enum map_type type, FILE *fp) | |
90f18e63 SD |
402 | { |
403 | size_t ret = 0; | |
404 | struct rb_node *nd; | |
405 | struct symbol_name_rb_node *pos; | |
406 | ||
aeafcbaf | 407 | for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { |
90f18e63 SD |
408 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); |
409 | fprintf(fp, "%s\n", pos->sym.name); | |
410 | } | |
411 | ||
412 | return ret; | |
413 | } | |
414 | ||
aeafcbaf | 415 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) |
9e03eb2d ACM |
416 | { |
417 | struct rb_node *nd; | |
aeafcbaf | 418 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); |
9e03eb2d | 419 | |
aeafcbaf ACM |
420 | if (dso->short_name != dso->long_name) |
421 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3846df2e | 422 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], |
aeafcbaf ACM |
423 | dso->loaded ? "" : "NOT "); |
424 | ret += dso__fprintf_buildid(dso, fp); | |
6a4694a4 | 425 | ret += fprintf(fp, ")\n"); |
aeafcbaf | 426 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { |
95011c60 ACM |
427 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
428 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
429 | } |
430 | ||
431 | return ret; | |
432 | } | |
433 | ||
9e201442 ACM |
434 | int kallsyms__parse(const char *filename, void *arg, |
435 | int (*process_symbol)(void *arg, const char *name, | |
3b01a413 | 436 | char type, u64 start, u64 end)) |
a2928c42 | 437 | { |
a2928c42 ACM |
438 | char *line = NULL; |
439 | size_t n; | |
3b01a413 ACM |
440 | int err = -1; |
441 | u64 prev_start = 0; | |
442 | char prev_symbol_type = 0; | |
443 | char *prev_symbol_name; | |
9e201442 | 444 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
445 | |
446 | if (file == NULL) | |
447 | goto out_failure; | |
448 | ||
3b01a413 ACM |
449 | prev_symbol_name = malloc(KSYM_NAME_LEN); |
450 | if (prev_symbol_name == NULL) | |
451 | goto out_close; | |
452 | ||
453 | err = 0; | |
454 | ||
a2928c42 | 455 | while (!feof(file)) { |
9cffa8d5 | 456 | u64 start; |
a2928c42 ACM |
457 | int line_len, len; |
458 | char symbol_type; | |
2e538c4a | 459 | char *symbol_name; |
a2928c42 ACM |
460 | |
461 | line_len = getline(&line, &n, file); | |
a1645ce1 | 462 | if (line_len < 0 || !line) |
a2928c42 ACM |
463 | break; |
464 | ||
a2928c42 ACM |
465 | line[--line_len] = '\0'; /* \n */ |
466 | ||
a0055ae2 | 467 | len = hex2u64(line, &start); |
a2928c42 ACM |
468 | |
469 | len++; | |
470 | if (len + 2 >= line_len) | |
471 | continue; | |
472 | ||
473 | symbol_type = toupper(line[len]); | |
3b01a413 ACM |
474 | len += 2; |
475 | symbol_name = line + len; | |
476 | len = line_len - len; | |
682b335a | 477 | |
3b01a413 ACM |
478 | if (len >= KSYM_NAME_LEN) { |
479 | err = -1; | |
682b335a | 480 | break; |
3b01a413 ACM |
481 | } |
482 | ||
483 | if (prev_symbol_type) { | |
484 | u64 end = start; | |
485 | if (end != prev_start) | |
486 | --end; | |
487 | err = process_symbol(arg, prev_symbol_name, | |
488 | prev_symbol_type, prev_start, end); | |
489 | if (err) | |
490 | break; | |
491 | } | |
492 | ||
493 | memcpy(prev_symbol_name, symbol_name, len + 1); | |
494 | prev_symbol_type = symbol_type; | |
495 | prev_start = start; | |
2e538c4a ACM |
496 | } |
497 | ||
3b01a413 | 498 | free(prev_symbol_name); |
2e538c4a | 499 | free(line); |
3b01a413 | 500 | out_close: |
2e538c4a | 501 | fclose(file); |
682b335a | 502 | return err; |
2e538c4a | 503 | |
2e538c4a ACM |
504 | out_failure: |
505 | return -1; | |
506 | } | |
507 | ||
682b335a ACM |
508 | struct process_kallsyms_args { |
509 | struct map *map; | |
510 | struct dso *dso; | |
511 | }; | |
512 | ||
c408fedf ACM |
513 | static u8 kallsyms2elf_type(char type) |
514 | { | |
515 | if (type == 'W') | |
516 | return STB_WEAK; | |
517 | ||
518 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
519 | } | |
520 | ||
682b335a | 521 | static int map__process_kallsym_symbol(void *arg, const char *name, |
3b01a413 | 522 | char type, u64 start, u64 end) |
682b335a ACM |
523 | { |
524 | struct symbol *sym; | |
525 | struct process_kallsyms_args *a = arg; | |
526 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
527 | ||
528 | if (!symbol_type__is_a(type, a->map->type)) | |
529 | return 0; | |
530 | ||
3b01a413 ACM |
531 | sym = symbol__new(start, end - start + 1, |
532 | kallsyms2elf_type(type), name); | |
682b335a ACM |
533 | if (sym == NULL) |
534 | return -ENOMEM; | |
535 | /* | |
536 | * We will pass the symbols to the filter later, in | |
537 | * map__split_kallsyms, when we have split the maps per module | |
538 | */ | |
539 | symbols__insert(root, sym); | |
a1645ce1 | 540 | |
682b335a ACM |
541 | return 0; |
542 | } | |
543 | ||
544 | /* | |
545 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
546 | * so that we can in the next step set the symbol ->end address and then | |
547 | * call kernel_maps__split_kallsyms. | |
548 | */ | |
aeafcbaf | 549 | static int dso__load_all_kallsyms(struct dso *dso, const char *filename, |
9e201442 | 550 | struct map *map) |
682b335a | 551 | { |
aeafcbaf | 552 | struct process_kallsyms_args args = { .map = map, .dso = dso, }; |
9e201442 | 553 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
554 | } |
555 | ||
2e538c4a ACM |
556 | /* |
557 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
558 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
559 | * the original ELF section names vmlinux have. | |
560 | */ | |
aeafcbaf | 561 | static int dso__split_kallsyms(struct dso *dso, struct map *map, |
9de89fe7 | 562 | symbol_filter_t filter) |
2e538c4a | 563 | { |
9de89fe7 | 564 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 565 | struct machine *machine = kmaps->machine; |
4e06255f | 566 | struct map *curr_map = map; |
2e538c4a | 567 | struct symbol *pos; |
8a953312 | 568 | int count = 0, moved = 0; |
aeafcbaf | 569 | struct rb_root *root = &dso->symbols[map->type]; |
4e06255f | 570 | struct rb_node *next = rb_first(root); |
2e538c4a ACM |
571 | int kernel_range = 0; |
572 | ||
573 | while (next) { | |
574 | char *module; | |
575 | ||
576 | pos = rb_entry(next, struct symbol, rb_node); | |
577 | next = rb_next(&pos->rb_node); | |
578 | ||
579 | module = strchr(pos->name, '\t'); | |
580 | if (module) { | |
75be6cf4 | 581 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
582 | goto discard_symbol; |
583 | ||
2e538c4a ACM |
584 | *module++ = '\0'; |
585 | ||
b7cece76 | 586 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 587 | if (curr_map != map && |
aeafcbaf | 588 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 589 | machine__is_default_guest(machine)) { |
a1645ce1 ZY |
590 | /* |
591 | * We assume all symbols of a module are | |
592 | * continuous in * kallsyms, so curr_map | |
593 | * points to a module and all its | |
594 | * symbols are in its kmap. Mark it as | |
595 | * loaded. | |
596 | */ | |
597 | dso__set_loaded(curr_map->dso, | |
598 | curr_map->type); | |
599 | } | |
600 | ||
601 | curr_map = map_groups__find_by_name(kmaps, | |
602 | map->type, module); | |
4e06255f | 603 | if (curr_map == NULL) { |
2f51903b | 604 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 605 | "inconsistency while looking " |
a1645ce1 | 606 | "for \"%s\" module!\n", |
23346f21 | 607 | machine->root_dir, module); |
a1645ce1 ZY |
608 | curr_map = map; |
609 | goto discard_symbol; | |
af427bf5 | 610 | } |
b7cece76 | 611 | |
a1645ce1 | 612 | if (curr_map->dso->loaded && |
23346f21 | 613 | !machine__is_default_guest(machine)) |
b7cece76 | 614 | goto discard_symbol; |
af427bf5 | 615 | } |
2e538c4a ACM |
616 | /* |
617 | * So that we look just like we get from .ko files, | |
618 | * i.e. not prelinked, relative to map->start. | |
619 | */ | |
4e06255f ACM |
620 | pos->start = curr_map->map_ip(curr_map, pos->start); |
621 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
622 | } else if (curr_map != map) { | |
2e538c4a | 623 | char dso_name[PATH_MAX]; |
aeafcbaf | 624 | struct dso *ndso; |
2e538c4a | 625 | |
8a953312 ACM |
626 | if (count == 0) { |
627 | curr_map = map; | |
628 | goto filter_symbol; | |
629 | } | |
630 | ||
aeafcbaf | 631 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
a1645ce1 ZY |
632 | snprintf(dso_name, sizeof(dso_name), |
633 | "[guest.kernel].%d", | |
634 | kernel_range++); | |
635 | else | |
636 | snprintf(dso_name, sizeof(dso_name), | |
637 | "[kernel].%d", | |
638 | kernel_range++); | |
2e538c4a | 639 | |
aeafcbaf ACM |
640 | ndso = dso__new(dso_name); |
641 | if (ndso == NULL) | |
2e538c4a ACM |
642 | return -1; |
643 | ||
aeafcbaf | 644 | ndso->kernel = dso->kernel; |
a1645ce1 | 645 | |
aeafcbaf | 646 | curr_map = map__new2(pos->start, ndso, map->type); |
37fe5fcb | 647 | if (curr_map == NULL) { |
aeafcbaf | 648 | dso__delete(ndso); |
2e538c4a ACM |
649 | return -1; |
650 | } | |
a2928c42 | 651 | |
4e06255f | 652 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 653 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
654 | ++kernel_range; |
655 | } | |
8a953312 | 656 | filter_symbol: |
4e06255f | 657 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 658 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 659 | symbol__delete(pos); |
2e538c4a | 660 | } else { |
4e06255f ACM |
661 | if (curr_map != map) { |
662 | rb_erase(&pos->rb_node, root); | |
663 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
664 | ++moved; |
665 | } else | |
666 | ++count; | |
9974f496 | 667 | } |
a2928c42 ACM |
668 | } |
669 | ||
a1645ce1 | 670 | if (curr_map != map && |
aeafcbaf | 671 | dso->kernel == DSO_TYPE_GUEST_KERNEL && |
23346f21 | 672 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
673 | dso__set_loaded(curr_map->dso, curr_map->type); |
674 | } | |
675 | ||
8a953312 | 676 | return count + moved; |
2e538c4a | 677 | } |
a2928c42 | 678 | |
ec80fde7 ACM |
679 | static bool symbol__restricted_filename(const char *filename, |
680 | const char *restricted_filename) | |
681 | { | |
682 | bool restricted = false; | |
683 | ||
684 | if (symbol_conf.kptr_restrict) { | |
685 | char *r = realpath(filename, NULL); | |
686 | ||
687 | if (r != NULL) { | |
688 | restricted = strcmp(r, restricted_filename) == 0; | |
689 | free(r); | |
690 | return restricted; | |
691 | } | |
692 | } | |
693 | ||
694 | return restricted; | |
695 | } | |
696 | ||
aeafcbaf | 697 | int dso__load_kallsyms(struct dso *dso, const char *filename, |
9de89fe7 | 698 | struct map *map, symbol_filter_t filter) |
2e538c4a | 699 | { |
ec80fde7 ACM |
700 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
701 | return -1; | |
702 | ||
aeafcbaf | 703 | if (dso__load_all_kallsyms(dso, filename, map) < 0) |
2e538c4a ACM |
704 | return -1; |
705 | ||
aeafcbaf ACM |
706 | if (dso->kernel == DSO_TYPE_GUEST_KERNEL) |
707 | dso->symtab_type = SYMTAB__GUEST_KALLSYMS; | |
a1645ce1 | 708 | else |
aeafcbaf | 709 | dso->symtab_type = SYMTAB__KALLSYMS; |
2e538c4a | 710 | |
aeafcbaf | 711 | return dso__split_kallsyms(dso, map, filter); |
af427bf5 ACM |
712 | } |
713 | ||
aeafcbaf | 714 | static int dso__load_perf_map(struct dso *dso, struct map *map, |
6beba7ad | 715 | symbol_filter_t filter) |
80d496be PE |
716 | { |
717 | char *line = NULL; | |
718 | size_t n; | |
719 | FILE *file; | |
720 | int nr_syms = 0; | |
721 | ||
aeafcbaf | 722 | file = fopen(dso->long_name, "r"); |
80d496be PE |
723 | if (file == NULL) |
724 | goto out_failure; | |
725 | ||
726 | while (!feof(file)) { | |
9cffa8d5 | 727 | u64 start, size; |
80d496be PE |
728 | struct symbol *sym; |
729 | int line_len, len; | |
730 | ||
731 | line_len = getline(&line, &n, file); | |
732 | if (line_len < 0) | |
733 | break; | |
734 | ||
735 | if (!line) | |
736 | goto out_failure; | |
737 | ||
738 | line[--line_len] = '\0'; /* \n */ | |
739 | ||
740 | len = hex2u64(line, &start); | |
741 | ||
742 | len++; | |
743 | if (len + 2 >= line_len) | |
744 | continue; | |
745 | ||
746 | len += hex2u64(line + len, &size); | |
747 | ||
748 | len++; | |
749 | if (len + 2 >= line_len) | |
750 | continue; | |
751 | ||
c408fedf | 752 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
753 | |
754 | if (sym == NULL) | |
755 | goto out_delete_line; | |
756 | ||
439d473b | 757 | if (filter && filter(map, sym)) |
00a192b3 | 758 | symbol__delete(sym); |
80d496be | 759 | else { |
aeafcbaf | 760 | symbols__insert(&dso->symbols[map->type], sym); |
80d496be PE |
761 | nr_syms++; |
762 | } | |
763 | } | |
764 | ||
765 | free(line); | |
766 | fclose(file); | |
767 | ||
768 | return nr_syms; | |
769 | ||
770 | out_delete_line: | |
771 | free(line); | |
772 | out_failure: | |
773 | return -1; | |
774 | } | |
775 | ||
a2928c42 ACM |
776 | /** |
777 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
778 | * | |
aeafcbaf | 779 | * @syms: struct elf_symtab instance to iterate |
83a0944f | 780 | * @idx: uint32_t idx |
a2928c42 ACM |
781 | * @sym: GElf_Sym iterator |
782 | */ | |
83a0944f IM |
783 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
784 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
785 | idx < nr_syms; \ | |
786 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
787 | |
788 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
789 | { | |
790 | return GELF_ST_TYPE(sym->st_info); | |
791 | } | |
792 | ||
793 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
794 | { | |
795 | return elf_sym__type(sym) == STT_FUNC && | |
796 | sym->st_name != 0 && | |
81833130 | 797 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
798 | } |
799 | ||
f1dfa0b1 ACM |
800 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
801 | { | |
802 | return elf_sym__type(sym) == STT_OBJECT && | |
803 | sym->st_name != 0 && | |
804 | sym->st_shndx != SHN_UNDEF; | |
805 | } | |
806 | ||
6cfcc53e MG |
807 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
808 | { | |
809 | return elf_sym__type(sym) == STT_NOTYPE && | |
810 | sym->st_name != 0 && | |
811 | sym->st_shndx != SHN_UNDEF && | |
812 | sym->st_shndx != SHN_ABS; | |
813 | } | |
814 | ||
815 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
816 | const Elf_Data *secstrs) | |
817 | { | |
818 | return secstrs->d_buf + shdr->sh_name; | |
819 | } | |
820 | ||
821 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
822 | const Elf_Data *secstrs) | |
823 | { | |
824 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
825 | } | |
826 | ||
f1dfa0b1 ACM |
827 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
828 | const Elf_Data *secstrs) | |
829 | { | |
830 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
831 | } | |
832 | ||
a2928c42 ACM |
833 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
834 | const Elf_Data *symstrs) | |
835 | { | |
836 | return symstrs->d_buf + sym->st_name; | |
837 | } | |
838 | ||
839 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
840 | GElf_Shdr *shp, const char *name, | |
83a0944f | 841 | size_t *idx) |
a2928c42 ACM |
842 | { |
843 | Elf_Scn *sec = NULL; | |
844 | size_t cnt = 1; | |
845 | ||
846 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
847 | char *str; | |
848 | ||
849 | gelf_getshdr(sec, shp); | |
850 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
851 | if (!strcmp(name, str)) { | |
83a0944f IM |
852 | if (idx) |
853 | *idx = cnt; | |
a2928c42 ACM |
854 | break; |
855 | } | |
856 | ++cnt; | |
857 | } | |
858 | ||
859 | return sec; | |
860 | } | |
861 | ||
8ce998d6 ACM |
862 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
863 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
864 | idx < nr_entries; \ | |
865 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
866 | ||
867 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
868 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
869 | idx < nr_entries; \ | |
870 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
871 | ||
a25e46c4 ACM |
872 | /* |
873 | * We need to check if we have a .dynsym, so that we can handle the | |
874 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
875 | * .dynsym or .symtab). | |
876 | * And always look at the original dso, not at debuginfo packages, that | |
877 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
878 | */ | |
aeafcbaf | 879 | static int dso__synthesize_plt_symbols(struct dso *dso, struct map *map, |
82164161 | 880 | symbol_filter_t filter) |
8ce998d6 ACM |
881 | { |
882 | uint32_t nr_rel_entries, idx; | |
883 | GElf_Sym sym; | |
9cffa8d5 | 884 | u64 plt_offset; |
8ce998d6 ACM |
885 | GElf_Shdr shdr_plt; |
886 | struct symbol *f; | |
a25e46c4 | 887 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 888 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
889 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
890 | size_t dynsym_idx; | |
891 | GElf_Ehdr ehdr; | |
8ce998d6 | 892 | char sympltname[1024]; |
a25e46c4 ACM |
893 | Elf *elf; |
894 | int nr = 0, symidx, fd, err = 0; | |
ec5761ea | 895 | char name[PATH_MAX]; |
a25e46c4 | 896 | |
ec5761ea | 897 | snprintf(name, sizeof(name), "%s%s", |
aeafcbaf | 898 | symbol_conf.symfs, dso->long_name); |
ec5761ea | 899 | fd = open(name, O_RDONLY); |
a25e46c4 ACM |
900 | if (fd < 0) |
901 | goto out; | |
902 | ||
84087126 | 903 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
904 | if (elf == NULL) |
905 | goto out_close; | |
906 | ||
907 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
908 | goto out_elf_end; | |
909 | ||
910 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
911 | ".dynsym", &dynsym_idx); | |
912 | if (scn_dynsym == NULL) | |
913 | goto out_elf_end; | |
8ce998d6 | 914 | |
a25e46c4 | 915 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
916 | ".rela.plt", NULL); |
917 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 918 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
919 | ".rel.plt", NULL); |
920 | if (scn_plt_rel == NULL) | |
a25e46c4 | 921 | goto out_elf_end; |
8ce998d6 ACM |
922 | } |
923 | ||
a25e46c4 ACM |
924 | err = -1; |
925 | ||
8ce998d6 | 926 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 927 | goto out_elf_end; |
8ce998d6 | 928 | |
a25e46c4 ACM |
929 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
930 | goto out_elf_end; | |
8ce998d6 ACM |
931 | |
932 | /* | |
83a0944f | 933 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
934 | * and the symbols in the .dynsym they refer to. |
935 | */ | |
936 | reldata = elf_getdata(scn_plt_rel, NULL); | |
937 | if (reldata == NULL) | |
a25e46c4 | 938 | goto out_elf_end; |
8ce998d6 ACM |
939 | |
940 | syms = elf_getdata(scn_dynsym, NULL); | |
941 | if (syms == NULL) | |
a25e46c4 | 942 | goto out_elf_end; |
8ce998d6 | 943 | |
a25e46c4 | 944 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 945 | if (scn_symstrs == NULL) |
a25e46c4 | 946 | goto out_elf_end; |
8ce998d6 ACM |
947 | |
948 | symstrs = elf_getdata(scn_symstrs, NULL); | |
949 | if (symstrs == NULL) | |
a25e46c4 | 950 | goto out_elf_end; |
8ce998d6 ACM |
951 | |
952 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
953 | plt_offset = shdr_plt.sh_offset; | |
954 | ||
955 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
956 | GElf_Rela pos_mem, *pos; | |
957 | ||
958 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
959 | nr_rel_entries) { | |
960 | symidx = GELF_R_SYM(pos->r_info); | |
961 | plt_offset += shdr_plt.sh_entsize; | |
962 | gelf_getsym(syms, symidx, &sym); | |
963 | snprintf(sympltname, sizeof(sympltname), | |
964 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
965 | ||
966 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 967 | STB_GLOBAL, sympltname); |
8ce998d6 | 968 | if (!f) |
a25e46c4 | 969 | goto out_elf_end; |
8ce998d6 | 970 | |
82164161 ACM |
971 | if (filter && filter(map, f)) |
972 | symbol__delete(f); | |
973 | else { | |
aeafcbaf | 974 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
975 | ++nr; |
976 | } | |
8ce998d6 ACM |
977 | } |
978 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
979 | GElf_Rel pos_mem, *pos; | |
980 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
981 | nr_rel_entries) { | |
982 | symidx = GELF_R_SYM(pos->r_info); | |
983 | plt_offset += shdr_plt.sh_entsize; | |
984 | gelf_getsym(syms, symidx, &sym); | |
985 | snprintf(sympltname, sizeof(sympltname), | |
986 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
987 | ||
988 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 989 | STB_GLOBAL, sympltname); |
8ce998d6 | 990 | if (!f) |
a25e46c4 | 991 | goto out_elf_end; |
8ce998d6 | 992 | |
82164161 ACM |
993 | if (filter && filter(map, f)) |
994 | symbol__delete(f); | |
995 | else { | |
aeafcbaf | 996 | symbols__insert(&dso->symbols[map->type], f); |
82164161 ACM |
997 | ++nr; |
998 | } | |
8ce998d6 | 999 | } |
8ce998d6 ACM |
1000 | } |
1001 | ||
a25e46c4 ACM |
1002 | err = 0; |
1003 | out_elf_end: | |
1004 | elf_end(elf); | |
1005 | out_close: | |
1006 | close(fd); | |
1007 | ||
1008 | if (err == 0) | |
1009 | return nr; | |
1010 | out: | |
fe2197b8 | 1011 | pr_debug("%s: problems reading %s PLT info.\n", |
aeafcbaf | 1012 | __func__, dso->long_name); |
a25e46c4 | 1013 | return 0; |
8ce998d6 ACM |
1014 | } |
1015 | ||
aeafcbaf | 1016 | static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type) |
d45868d3 ACM |
1017 | { |
1018 | switch (type) { | |
1019 | case MAP__FUNCTION: | |
aeafcbaf | 1020 | return elf_sym__is_function(sym); |
f1dfa0b1 | 1021 | case MAP__VARIABLE: |
aeafcbaf | 1022 | return elf_sym__is_object(sym); |
d45868d3 ACM |
1023 | default: |
1024 | return false; | |
1025 | } | |
1026 | } | |
1027 | ||
aeafcbaf ACM |
1028 | static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs, |
1029 | enum map_type type) | |
d45868d3 ACM |
1030 | { |
1031 | switch (type) { | |
1032 | case MAP__FUNCTION: | |
aeafcbaf | 1033 | return elf_sec__is_text(shdr, secstrs); |
f1dfa0b1 | 1034 | case MAP__VARIABLE: |
aeafcbaf | 1035 | return elf_sec__is_data(shdr, secstrs); |
d45868d3 ACM |
1036 | default: |
1037 | return false; | |
1038 | } | |
1039 | } | |
1040 | ||
70c3856b EM |
1041 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
1042 | { | |
1043 | Elf_Scn *sec = NULL; | |
1044 | GElf_Shdr shdr; | |
1045 | size_t cnt = 1; | |
1046 | ||
1047 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
1048 | gelf_getshdr(sec, &shdr); | |
1049 | ||
1050 | if ((addr >= shdr.sh_addr) && | |
1051 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
1052 | return cnt; | |
1053 | ||
1054 | ++cnt; | |
1055 | } | |
1056 | ||
1057 | return -1; | |
1058 | } | |
1059 | ||
aeafcbaf | 1060 | static int dso__load_sym(struct dso *dso, struct map *map, const char *name, |
6da80ce8 DM |
1061 | int fd, symbol_filter_t filter, int kmodule, |
1062 | int want_symtab) | |
a2928c42 | 1063 | { |
aeafcbaf | 1064 | struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL; |
2e538c4a | 1065 | struct map *curr_map = map; |
aeafcbaf | 1066 | struct dso *curr_dso = dso; |
6cfcc53e | 1067 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1068 | uint32_t nr_syms; |
1069 | int err = -1; | |
83a0944f | 1070 | uint32_t idx; |
a2928c42 | 1071 | GElf_Ehdr ehdr; |
70c3856b EM |
1072 | GElf_Shdr shdr, opdshdr; |
1073 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1074 | GElf_Sym sym; |
70c3856b | 1075 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1076 | Elf *elf; |
439d473b | 1077 | int nr = 0; |
70c3856b | 1078 | size_t opdidx = 0; |
a2928c42 | 1079 | |
84087126 | 1080 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1081 | if (elf == NULL) { |
8b1389ef | 1082 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1083 | goto out_close; |
1084 | } | |
1085 | ||
1086 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1087 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1088 | goto out_elf_end; |
1089 | } | |
1090 | ||
6da80ce8 | 1091 | /* Always reject images with a mismatched build-id: */ |
aeafcbaf | 1092 | if (dso->has_build_id) { |
21916c38 DM |
1093 | u8 build_id[BUILD_ID_SIZE]; |
1094 | ||
1095 | if (elf_read_build_id(elf, build_id, | |
1096 | BUILD_ID_SIZE) != BUILD_ID_SIZE) | |
1097 | goto out_elf_end; | |
1098 | ||
aeafcbaf | 1099 | if (!dso__build_id_equal(dso, build_id)) |
21916c38 DM |
1100 | goto out_elf_end; |
1101 | } | |
1102 | ||
a2928c42 | 1103 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1104 | if (sec == NULL) { |
6da80ce8 DM |
1105 | if (want_symtab) |
1106 | goto out_elf_end; | |
1107 | ||
a25e46c4 ACM |
1108 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1109 | if (sec == NULL) | |
8ce998d6 | 1110 | goto out_elf_end; |
8ce998d6 | 1111 | } |
a2928c42 | 1112 | |
70c3856b EM |
1113 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
1114 | if (opdsec) | |
1115 | opddata = elf_rawdata(opdsec, NULL); | |
1116 | ||
a2928c42 ACM |
1117 | syms = elf_getdata(sec, NULL); |
1118 | if (syms == NULL) | |
1119 | goto out_elf_end; | |
1120 | ||
1121 | sec = elf_getscn(elf, shdr.sh_link); | |
1122 | if (sec == NULL) | |
1123 | goto out_elf_end; | |
1124 | ||
1125 | symstrs = elf_getdata(sec, NULL); | |
1126 | if (symstrs == NULL) | |
1127 | goto out_elf_end; | |
1128 | ||
6cfcc53e MG |
1129 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1130 | if (sec_strndx == NULL) | |
1131 | goto out_elf_end; | |
1132 | ||
1133 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1134 | if (secstrs == NULL) |
6cfcc53e MG |
1135 | goto out_elf_end; |
1136 | ||
a2928c42 ACM |
1137 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1138 | ||
e9fbc9dc | 1139 | memset(&sym, 0, sizeof(sym)); |
aeafcbaf ACM |
1140 | if (dso->kernel == DSO_TYPE_USER) { |
1141 | dso->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
1142 | elf_section_by_name(elf, &ehdr, &shdr, |
1143 | ".gnu.prelink_undo", | |
1144 | NULL) != NULL); | |
aeafcbaf ACM |
1145 | } else { |
1146 | dso->adjust_symbols = 0; | |
1147 | } | |
83a0944f | 1148 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1149 | struct symbol *f; |
56b03f3c | 1150 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1151 | char *demangled = NULL; |
6cfcc53e MG |
1152 | int is_label = elf_sym__is_label(&sym); |
1153 | const char *section_name; | |
a2928c42 | 1154 | |
9de89fe7 ACM |
1155 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1156 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1157 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1158 | |
d45868d3 | 1159 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1160 | continue; |
1161 | ||
696b97a5 DM |
1162 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1163 | * don't identify functions, so will confuse the profile | |
1164 | * output: */ | |
1165 | if (ehdr.e_machine == EM_ARM) { | |
1166 | if (!strcmp(elf_name, "$a") || | |
1167 | !strcmp(elf_name, "$d") || | |
1168 | !strcmp(elf_name, "$t")) | |
1169 | continue; | |
1170 | } | |
1171 | ||
70c3856b EM |
1172 | if (opdsec && sym.st_shndx == opdidx) { |
1173 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1174 | u64 *opd = opddata->d_buf + offset; | |
1175 | sym.st_value = *opd; | |
1176 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1177 | } | |
1178 | ||
a2928c42 ACM |
1179 | sec = elf_getscn(elf, sym.st_shndx); |
1180 | if (!sec) | |
1181 | goto out_elf_end; | |
1182 | ||
1183 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1184 | |
d45868d3 | 1185 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1186 | continue; |
1187 | ||
1188 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1189 | |
b2f8fb23 DDAG |
1190 | /* On ARM, symbols for thumb functions have 1 added to |
1191 | * the symbol address as a flag - remove it */ | |
1192 | if ((ehdr.e_machine == EM_ARM) && | |
1193 | (map->type == MAP__FUNCTION) && | |
1194 | (sym.st_value & 1)) | |
1195 | --sym.st_value; | |
1196 | ||
aeafcbaf | 1197 | if (dso->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1198 | char dso_name[PATH_MAX]; |
1199 | ||
1200 | if (strcmp(section_name, | |
b63be8d7 | 1201 | (curr_dso->short_name + |
aeafcbaf | 1202 | dso->short_name_len)) == 0) |
2e538c4a ACM |
1203 | goto new_symbol; |
1204 | ||
1205 | if (strcmp(section_name, ".text") == 0) { | |
1206 | curr_map = map; | |
aeafcbaf | 1207 | curr_dso = dso; |
2e538c4a ACM |
1208 | goto new_symbol; |
1209 | } | |
1210 | ||
1211 | snprintf(dso_name, sizeof(dso_name), | |
aeafcbaf | 1212 | "%s%s", dso->short_name, section_name); |
2e538c4a | 1213 | |
9de89fe7 | 1214 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1215 | if (curr_map == NULL) { |
1216 | u64 start = sym.st_value; | |
1217 | ||
1218 | if (kmodule) | |
1219 | start += map->start + shdr.sh_offset; | |
1220 | ||
00a192b3 | 1221 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1222 | if (curr_dso == NULL) |
1223 | goto out_elf_end; | |
aeafcbaf ACM |
1224 | curr_dso->kernel = dso->kernel; |
1225 | curr_dso->long_name = dso->long_name; | |
1226 | curr_dso->long_name_len = dso->long_name_len; | |
3610583c | 1227 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1228 | map->type); |
2e538c4a ACM |
1229 | if (curr_map == NULL) { |
1230 | dso__delete(curr_dso); | |
1231 | goto out_elf_end; | |
1232 | } | |
ed52ce2e ACM |
1233 | curr_map->map_ip = identity__map_ip; |
1234 | curr_map->unmap_ip = identity__map_ip; | |
aeafcbaf | 1235 | curr_dso->symtab_type = dso->symtab_type; |
9de89fe7 | 1236 | map_groups__insert(kmap->kmaps, curr_map); |
aeafcbaf | 1237 | dsos__add(&dso->node, curr_dso); |
6275ce2d | 1238 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1239 | } else |
1240 | curr_dso = curr_map->dso; | |
1241 | ||
1242 | goto new_symbol; | |
af427bf5 ACM |
1243 | } |
1244 | ||
2e538c4a | 1245 | if (curr_dso->adjust_symbols) { |
9486aa38 ACM |
1246 | pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " " |
1247 | "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__, | |
29a9f66d ACM |
1248 | (u64)sym.st_value, (u64)shdr.sh_addr, |
1249 | (u64)shdr.sh_offset); | |
f5812a7a | 1250 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1251 | } |
28ac909b ACM |
1252 | /* |
1253 | * We need to figure out if the object was created from C++ sources | |
1254 | * DWARF DW_compile_unit has this, but we don't always have access | |
1255 | * to it... | |
1256 | */ | |
83a0944f | 1257 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1258 | if (demangled != NULL) |
83a0944f | 1259 | elf_name = demangled; |
2e538c4a | 1260 | new_symbol: |
c408fedf ACM |
1261 | f = symbol__new(sym.st_value, sym.st_size, |
1262 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1263 | free(demangled); |
a2928c42 ACM |
1264 | if (!f) |
1265 | goto out_elf_end; | |
1266 | ||
2e538c4a | 1267 | if (filter && filter(curr_map, f)) |
00a192b3 | 1268 | symbol__delete(f); |
69ee69f6 | 1269 | else { |
6a4694a4 | 1270 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1271 | nr++; |
1272 | } | |
a2928c42 ACM |
1273 | } |
1274 | ||
2e538c4a ACM |
1275 | /* |
1276 | * For misannotated, zeroed, ASM function sizes. | |
1277 | */ | |
6275ce2d | 1278 | if (nr > 0) { |
aeafcbaf | 1279 | symbols__fixup_end(&dso->symbols[map->type]); |
6275ce2d ACM |
1280 | if (kmap) { |
1281 | /* | |
1282 | * We need to fixup this here too because we create new | |
1283 | * maps here, for things like vsyscall sections. | |
1284 | */ | |
1285 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1286 | } | |
1287 | } | |
a2928c42 ACM |
1288 | err = nr; |
1289 | out_elf_end: | |
1290 | elf_end(elf); | |
1291 | out_close: | |
1292 | return err; | |
1293 | } | |
1294 | ||
aeafcbaf | 1295 | static bool dso__build_id_equal(const struct dso *dso, u8 *build_id) |
78075caa | 1296 | { |
aeafcbaf | 1297 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; |
78075caa ACM |
1298 | } |
1299 | ||
a1645ce1 | 1300 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1301 | { |
e30a3d12 | 1302 | bool have_build_id = false; |
57f395a7 FW |
1303 | struct dso *pos; |
1304 | ||
6122e4e4 ACM |
1305 | list_for_each_entry(pos, head, node) { |
1306 | if (with_hits && !pos->hit) | |
1307 | continue; | |
f6e1467d ACM |
1308 | if (pos->has_build_id) { |
1309 | have_build_id = true; | |
1310 | continue; | |
1311 | } | |
e30a3d12 ACM |
1312 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1313 | sizeof(pos->build_id)) > 0) { | |
1314 | have_build_id = true; | |
1315 | pos->has_build_id = true; | |
1316 | } | |
6122e4e4 | 1317 | } |
57f395a7 | 1318 | |
e30a3d12 | 1319 | return have_build_id; |
57f395a7 FW |
1320 | } |
1321 | ||
fd7a346e ACM |
1322 | /* |
1323 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1324 | */ | |
1325 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1326 | ||
21916c38 | 1327 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1328 | { |
21916c38 | 1329 | int err = -1; |
4d1e00a8 ACM |
1330 | GElf_Ehdr ehdr; |
1331 | GElf_Shdr shdr; | |
fd7a346e | 1332 | Elf_Data *data; |
4d1e00a8 | 1333 | Elf_Scn *sec; |
e57cfcda | 1334 | Elf_Kind ek; |
fd7a346e | 1335 | void *ptr; |
4d1e00a8 | 1336 | |
2643ce11 ACM |
1337 | if (size < BUILD_ID_SIZE) |
1338 | goto out; | |
1339 | ||
e57cfcda PE |
1340 | ek = elf_kind(elf); |
1341 | if (ek != ELF_K_ELF) | |
21916c38 | 1342 | goto out; |
e57cfcda | 1343 | |
4d1e00a8 | 1344 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1345 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1346 | goto out; |
4d1e00a8 ACM |
1347 | } |
1348 | ||
2643ce11 ACM |
1349 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1350 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1351 | if (sec == NULL) { |
1352 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1353 | ".notes", NULL); | |
1354 | if (sec == NULL) | |
21916c38 | 1355 | goto out; |
fd7a346e | 1356 | } |
4d1e00a8 | 1357 | |
fd7a346e ACM |
1358 | data = elf_getdata(sec, NULL); |
1359 | if (data == NULL) | |
21916c38 | 1360 | goto out; |
fd7a346e ACM |
1361 | |
1362 | ptr = data->d_buf; | |
1363 | while (ptr < (data->d_buf + data->d_size)) { | |
1364 | GElf_Nhdr *nhdr = ptr; | |
1365 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1366 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1367 | const char *name; | |
1368 | ||
1369 | ptr += sizeof(*nhdr); | |
1370 | name = ptr; | |
1371 | ptr += namesz; | |
1372 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1373 | nhdr->n_namesz == sizeof("GNU")) { | |
1374 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1375 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1376 | err = BUILD_ID_SIZE; | |
1377 | break; | |
1378 | } | |
1379 | } | |
1380 | ptr += descsz; | |
1381 | } | |
21916c38 DM |
1382 | |
1383 | out: | |
1384 | return err; | |
1385 | } | |
1386 | ||
1387 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1388 | { | |
1389 | int fd, err = -1; | |
1390 | Elf *elf; | |
1391 | ||
1392 | if (size < BUILD_ID_SIZE) | |
1393 | goto out; | |
1394 | ||
1395 | fd = open(filename, O_RDONLY); | |
1396 | if (fd < 0) | |
1397 | goto out; | |
1398 | ||
1399 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1400 | if (elf == NULL) { | |
1401 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1402 | goto out_close; | |
1403 | } | |
1404 | ||
1405 | err = elf_read_build_id(elf, bf, size); | |
1406 | ||
2643ce11 ACM |
1407 | elf_end(elf); |
1408 | out_close: | |
1409 | close(fd); | |
1410 | out: | |
1411 | return err; | |
1412 | } | |
1413 | ||
f1617b40 ACM |
1414 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1415 | { | |
1416 | int fd, err = -1; | |
1417 | ||
1418 | if (size < BUILD_ID_SIZE) | |
1419 | goto out; | |
1420 | ||
1421 | fd = open(filename, O_RDONLY); | |
1422 | if (fd < 0) | |
1423 | goto out; | |
1424 | ||
1425 | while (1) { | |
1426 | char bf[BUFSIZ]; | |
1427 | GElf_Nhdr nhdr; | |
1428 | int namesz, descsz; | |
1429 | ||
1430 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1431 | break; | |
1432 | ||
fd7a346e ACM |
1433 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1434 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1435 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1436 | nhdr.n_namesz == sizeof("GNU")) { | |
1437 | if (read(fd, bf, namesz) != namesz) | |
1438 | break; | |
1439 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1440 | if (read(fd, build_id, | |
1441 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1442 | err = 0; | |
1443 | break; | |
1444 | } | |
1445 | } else if (read(fd, bf, descsz) != descsz) | |
1446 | break; | |
1447 | } else { | |
1448 | int n = namesz + descsz; | |
1449 | if (read(fd, bf, n) != n) | |
1450 | break; | |
1451 | } | |
1452 | } | |
1453 | close(fd); | |
1454 | out: | |
1455 | return err; | |
1456 | } | |
1457 | ||
aeafcbaf | 1458 | char dso__symtab_origin(const struct dso *dso) |
94cb9e38 ACM |
1459 | { |
1460 | static const char origin[] = { | |
878b439d ACM |
1461 | [SYMTAB__KALLSYMS] = 'k', |
1462 | [SYMTAB__JAVA_JIT] = 'j', | |
1463 | [SYMTAB__BUILD_ID_CACHE] = 'B', | |
1464 | [SYMTAB__FEDORA_DEBUGINFO] = 'f', | |
1465 | [SYMTAB__UBUNTU_DEBUGINFO] = 'u', | |
1466 | [SYMTAB__BUILDID_DEBUGINFO] = 'b', | |
1467 | [SYMTAB__SYSTEM_PATH_DSO] = 'd', | |
1468 | [SYMTAB__SYSTEM_PATH_KMODULE] = 'K', | |
1469 | [SYMTAB__GUEST_KALLSYMS] = 'g', | |
1470 | [SYMTAB__GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1471 | }; |
1472 | ||
aeafcbaf | 1473 | if (dso == NULL || dso->symtab_type == SYMTAB__NOT_FOUND) |
94cb9e38 | 1474 | return '!'; |
aeafcbaf | 1475 | return origin[dso->symtab_type]; |
94cb9e38 ACM |
1476 | } |
1477 | ||
aeafcbaf | 1478 | int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) |
a2928c42 | 1479 | { |
4d1e00a8 | 1480 | int size = PATH_MAX; |
c338aee8 | 1481 | char *name; |
a2928c42 ACM |
1482 | int ret = -1; |
1483 | int fd; | |
23346f21 | 1484 | struct machine *machine; |
a1645ce1 | 1485 | const char *root_dir; |
6da80ce8 | 1486 | int want_symtab; |
a2928c42 | 1487 | |
aeafcbaf | 1488 | dso__set_loaded(dso, map->type); |
66bd8424 | 1489 | |
aeafcbaf ACM |
1490 | if (dso->kernel == DSO_TYPE_KERNEL) |
1491 | return dso__load_kernel_sym(dso, map, filter); | |
1492 | else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) | |
1493 | return dso__load_guest_kernel_sym(dso, map, filter); | |
a1645ce1 | 1494 | |
23346f21 ACM |
1495 | if (map->groups && map->groups->machine) |
1496 | machine = map->groups->machine; | |
a1645ce1 | 1497 | else |
23346f21 | 1498 | machine = NULL; |
c338aee8 ACM |
1499 | |
1500 | name = malloc(size); | |
a2928c42 ACM |
1501 | if (!name) |
1502 | return -1; | |
1503 | ||
aeafcbaf | 1504 | dso->adjust_symbols = 0; |
f5812a7a | 1505 | |
aeafcbaf | 1506 | if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { |
981c1252 PE |
1507 | struct stat st; |
1508 | ||
1509 | if (stat(dso->name, &st) < 0) | |
1510 | return -1; | |
1511 | ||
1512 | if (st.st_uid && (st.st_uid != geteuid())) { | |
1513 | pr_warning("File %s not owned by current user or root, " | |
1514 | "ignoring it.\n", dso->name); | |
1515 | return -1; | |
1516 | } | |
1517 | ||
aeafcbaf ACM |
1518 | ret = dso__load_perf_map(dso, map, filter); |
1519 | dso->symtab_type = ret > 0 ? SYMTAB__JAVA_JIT : | |
878b439d | 1520 | SYMTAB__NOT_FOUND; |
94cb9e38 ACM |
1521 | return ret; |
1522 | } | |
1523 | ||
6da80ce8 DM |
1524 | /* Iterate over candidate debug images. |
1525 | * On the first pass, only load images if they have a full symtab. | |
1526 | * Failing that, do a second pass where we accept .dynsym also | |
1527 | */ | |
60e4b10c ACM |
1528 | want_symtab = 1; |
1529 | restart: | |
aeafcbaf ACM |
1530 | for (dso->symtab_type = SYMTAB__BUILD_ID_CACHE; |
1531 | dso->symtab_type != SYMTAB__NOT_FOUND; | |
1532 | dso->symtab_type++) { | |
1533 | switch (dso->symtab_type) { | |
878b439d | 1534 | case SYMTAB__BUILD_ID_CACHE: |
ec5761ea DA |
1535 | /* skip the locally configured cache if a symfs is given */ |
1536 | if (symbol_conf.symfs[0] || | |
aeafcbaf | 1537 | (dso__build_id_filename(dso, name, size) == NULL)) { |
6da80ce8 | 1538 | continue; |
ec5761ea | 1539 | } |
6da80ce8 | 1540 | break; |
878b439d | 1541 | case SYMTAB__FEDORA_DEBUGINFO: |
ec5761ea | 1542 | snprintf(name, size, "%s/usr/lib/debug%s.debug", |
aeafcbaf | 1543 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1544 | break; |
878b439d | 1545 | case SYMTAB__UBUNTU_DEBUGINFO: |
ec5761ea | 1546 | snprintf(name, size, "%s/usr/lib/debug%s", |
aeafcbaf | 1547 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1548 | break; |
878b439d | 1549 | case SYMTAB__BUILDID_DEBUGINFO: { |
6da80ce8 DM |
1550 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
1551 | ||
aeafcbaf | 1552 | if (!dso->has_build_id) |
6da80ce8 DM |
1553 | continue; |
1554 | ||
aeafcbaf ACM |
1555 | build_id__sprintf(dso->build_id, |
1556 | sizeof(dso->build_id), | |
6da80ce8 DM |
1557 | build_id_hex); |
1558 | snprintf(name, size, | |
ec5761ea DA |
1559 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", |
1560 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1561 | } |
6da80ce8 | 1562 | break; |
878b439d | 1563 | case SYMTAB__SYSTEM_PATH_DSO: |
ec5761ea | 1564 | snprintf(name, size, "%s%s", |
aeafcbaf | 1565 | symbol_conf.symfs, dso->long_name); |
a2928c42 | 1566 | break; |
878b439d | 1567 | case SYMTAB__GUEST_KMODULE: |
fb7d0b3c KM |
1568 | if (map->groups && machine) |
1569 | root_dir = machine->root_dir; | |
a1645ce1 ZY |
1570 | else |
1571 | root_dir = ""; | |
ec5761ea | 1572 | snprintf(name, size, "%s%s%s", symbol_conf.symfs, |
aeafcbaf | 1573 | root_dir, dso->long_name); |
ec5761ea DA |
1574 | break; |
1575 | ||
878b439d | 1576 | case SYMTAB__SYSTEM_PATH_KMODULE: |
ec5761ea | 1577 | snprintf(name, size, "%s%s", symbol_conf.symfs, |
aeafcbaf | 1578 | dso->long_name); |
a1645ce1 | 1579 | break; |
60e4b10c | 1580 | default:; |
a2928c42 | 1581 | } |
6da80ce8 DM |
1582 | |
1583 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1584 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1585 | if (fd < 0) |
1586 | continue; | |
a2928c42 | 1587 | |
aeafcbaf | 1588 | ret = dso__load_sym(dso, map, name, fd, filter, 0, |
6da80ce8 DM |
1589 | want_symtab); |
1590 | close(fd); | |
a2928c42 | 1591 | |
6da80ce8 DM |
1592 | /* |
1593 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1594 | * info!?!? | |
1595 | */ | |
1596 | if (!ret) | |
1597 | continue; | |
a2928c42 | 1598 | |
6da80ce8 | 1599 | if (ret > 0) { |
aeafcbaf ACM |
1600 | int nr_plt = dso__synthesize_plt_symbols(dso, map, |
1601 | filter); | |
6da80ce8 DM |
1602 | if (nr_plt > 0) |
1603 | ret += nr_plt; | |
1604 | break; | |
1605 | } | |
a25e46c4 | 1606 | } |
6da80ce8 | 1607 | |
60e4b10c ACM |
1608 | /* |
1609 | * If we wanted a full symtab but no image had one, | |
1610 | * relax our requirements and repeat the search. | |
1611 | */ | |
1612 | if (ret <= 0 && want_symtab) { | |
1613 | want_symtab = 0; | |
1614 | goto restart; | |
1615 | } | |
1616 | ||
a2928c42 | 1617 | free(name); |
aeafcbaf | 1618 | if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) |
1340e6bb | 1619 | return 0; |
a2928c42 ACM |
1620 | return ret; |
1621 | } | |
1622 | ||
aeafcbaf | 1623 | struct map *map_groups__find_by_name(struct map_groups *mg, |
79406cd7 | 1624 | enum map_type type, const char *name) |
439d473b ACM |
1625 | { |
1626 | struct rb_node *nd; | |
1627 | ||
aeafcbaf | 1628 | for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1629 | struct map *map = rb_entry(nd, struct map, rb_node); |
1630 | ||
b7cece76 | 1631 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1632 | return map; |
1633 | } | |
1634 | ||
1635 | return NULL; | |
1636 | } | |
1637 | ||
aeafcbaf ACM |
1638 | static int dso__kernel_module_get_build_id(struct dso *dso, |
1639 | const char *root_dir) | |
b7cece76 ACM |
1640 | { |
1641 | char filename[PATH_MAX]; | |
1642 | /* | |
1643 | * kernel module short names are of the form "[module]" and | |
1644 | * we need just "module" here. | |
1645 | */ | |
aeafcbaf | 1646 | const char *name = dso->short_name + 1; |
b7cece76 ACM |
1647 | |
1648 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1649 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1650 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 | 1651 | |
aeafcbaf ACM |
1652 | if (sysfs__read_build_id(filename, dso->build_id, |
1653 | sizeof(dso->build_id)) == 0) | |
1654 | dso->has_build_id = true; | |
b7cece76 ACM |
1655 | |
1656 | return 0; | |
1657 | } | |
1658 | ||
aeafcbaf | 1659 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
a1645ce1 | 1660 | const char *dir_name) |
6cfcc53e | 1661 | { |
439d473b | 1662 | struct dirent *dent; |
5aab621b | 1663 | DIR *dir = opendir(dir_name); |
74534341 | 1664 | int ret = 0; |
6cfcc53e | 1665 | |
439d473b | 1666 | if (!dir) { |
5aab621b | 1667 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1668 | return -1; |
1669 | } | |
6cfcc53e | 1670 | |
439d473b ACM |
1671 | while ((dent = readdir(dir)) != NULL) { |
1672 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1673 | struct stat st; |
1674 | ||
1675 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1676 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1677 | if (stat(path, &st)) | |
1678 | continue; | |
439d473b | 1679 | |
a1645ce1 | 1680 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1681 | if (!strcmp(dent->d_name, ".") || |
1682 | !strcmp(dent->d_name, "..")) | |
1683 | continue; | |
1684 | ||
1685 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1686 | dir_name, dent->d_name); |
aeafcbaf | 1687 | ret = map_groups__set_modules_path_dir(mg, path); |
74534341 GJ |
1688 | if (ret < 0) |
1689 | goto out; | |
439d473b ACM |
1690 | } else { |
1691 | char *dot = strrchr(dent->d_name, '.'), | |
1692 | dso_name[PATH_MAX]; | |
1693 | struct map *map; | |
cfc10d3b | 1694 | char *long_name; |
439d473b ACM |
1695 | |
1696 | if (dot == NULL || strcmp(dot, ".ko")) | |
1697 | continue; | |
1698 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1699 | (int)(dot - dent->d_name), dent->d_name); | |
1700 | ||
a2a99e8e | 1701 | strxfrchar(dso_name, '-', '_'); |
aeafcbaf ACM |
1702 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
1703 | dso_name); | |
439d473b ACM |
1704 | if (map == NULL) |
1705 | continue; | |
1706 | ||
1707 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1708 | dir_name, dent->d_name); |
439d473b | 1709 | |
cfc10d3b | 1710 | long_name = strdup(path); |
74534341 GJ |
1711 | if (long_name == NULL) { |
1712 | ret = -1; | |
1713 | goto out; | |
1714 | } | |
cfc10d3b | 1715 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1716 | map->dso->lname_alloc = 1; |
a1645ce1 | 1717 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1718 | } |
439d473b | 1719 | } |
6cfcc53e | 1720 | |
74534341 | 1721 | out: |
439d473b | 1722 | closedir(dir); |
74534341 | 1723 | return ret; |
439d473b | 1724 | } |
6cfcc53e | 1725 | |
a1645ce1 | 1726 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1727 | { |
a1645ce1 ZY |
1728 | char version[PATH_MAX]; |
1729 | FILE *file; | |
1730 | char *name, *tmp; | |
1731 | const char *prefix = "Linux version "; | |
1732 | ||
1733 | sprintf(version, "%s/proc/version", root_dir); | |
1734 | file = fopen(version, "r"); | |
1735 | if (!file) | |
1736 | return NULL; | |
1737 | ||
1738 | version[0] = '\0'; | |
1739 | tmp = fgets(version, sizeof(version), file); | |
1740 | fclose(file); | |
1741 | ||
1742 | name = strstr(version, prefix); | |
1743 | if (!name) | |
1744 | return NULL; | |
1745 | name += strlen(prefix); | |
1746 | tmp = strchr(name, ' '); | |
1747 | if (tmp) | |
1748 | *tmp = '\0'; | |
1749 | ||
1750 | return strdup(name); | |
1751 | } | |
1752 | ||
aeafcbaf | 1753 | static int machine__set_modules_path(struct machine *machine) |
a1645ce1 ZY |
1754 | { |
1755 | char *version; | |
439d473b | 1756 | char modules_path[PATH_MAX]; |
6cfcc53e | 1757 | |
aeafcbaf | 1758 | version = get_kernel_version(machine->root_dir); |
a1645ce1 | 1759 | if (!version) |
439d473b | 1760 | return -1; |
6cfcc53e | 1761 | |
a1645ce1 | 1762 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
aeafcbaf | 1763 | machine->root_dir, version); |
a1645ce1 | 1764 | free(version); |
6cfcc53e | 1765 | |
aeafcbaf | 1766 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
6cfcc53e MG |
1767 | } |
1768 | ||
439d473b ACM |
1769 | /* |
1770 | * Constructor variant for modules (where we know from /proc/modules where | |
1771 | * they are loaded) and for vmlinux, where only after we load all the | |
1772 | * symbols we'll know where it starts and ends. | |
1773 | */ | |
3610583c | 1774 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1775 | { |
aeafcbaf ACM |
1776 | struct map *map = calloc(1, (sizeof(*map) + |
1777 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
1778 | if (map != NULL) { | |
439d473b | 1779 | /* |
afb7b4f0 | 1780 | * ->end will be filled after we load all the symbols |
439d473b | 1781 | */ |
aeafcbaf | 1782 | map__init(map, type, start, 0, 0, dso); |
439d473b | 1783 | } |
afb7b4f0 | 1784 | |
aeafcbaf | 1785 | return map; |
439d473b ACM |
1786 | } |
1787 | ||
aeafcbaf | 1788 | struct map *machine__new_module(struct machine *machine, u64 start, |
d28c6223 | 1789 | const char *filename) |
b7cece76 ACM |
1790 | { |
1791 | struct map *map; | |
aeafcbaf | 1792 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
1793 | |
1794 | if (dso == NULL) | |
1795 | return NULL; | |
1796 | ||
1797 | map = map__new2(start, dso, MAP__FUNCTION); | |
1798 | if (map == NULL) | |
1799 | return NULL; | |
1800 | ||
aeafcbaf | 1801 | if (machine__is_host(machine)) |
878b439d | 1802 | dso->symtab_type = SYMTAB__SYSTEM_PATH_KMODULE; |
a1645ce1 | 1803 | else |
878b439d | 1804 | dso->symtab_type = SYMTAB__GUEST_KMODULE; |
aeafcbaf | 1805 | map_groups__insert(&machine->kmaps, map); |
b7cece76 ACM |
1806 | return map; |
1807 | } | |
1808 | ||
aeafcbaf | 1809 | static int machine__create_modules(struct machine *machine) |
439d473b ACM |
1810 | { |
1811 | char *line = NULL; | |
1812 | size_t n; | |
a1645ce1 | 1813 | FILE *file; |
439d473b | 1814 | struct map *map; |
a1645ce1 ZY |
1815 | const char *modules; |
1816 | char path[PATH_MAX]; | |
1817 | ||
aeafcbaf | 1818 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
1819 | modules = symbol_conf.default_guest_modules; |
1820 | else { | |
aeafcbaf | 1821 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
1822 | modules = path; |
1823 | } | |
6cfcc53e | 1824 | |
ec80fde7 ACM |
1825 | if (symbol__restricted_filename(path, "/proc/modules")) |
1826 | return -1; | |
1827 | ||
a1645ce1 | 1828 | file = fopen(modules, "r"); |
439d473b ACM |
1829 | if (file == NULL) |
1830 | return -1; | |
6cfcc53e | 1831 | |
439d473b ACM |
1832 | while (!feof(file)) { |
1833 | char name[PATH_MAX]; | |
1834 | u64 start; | |
439d473b ACM |
1835 | char *sep; |
1836 | int line_len; | |
6cfcc53e | 1837 | |
439d473b ACM |
1838 | line_len = getline(&line, &n, file); |
1839 | if (line_len < 0) | |
1840 | break; | |
1841 | ||
1842 | if (!line) | |
1843 | goto out_failure; | |
1844 | ||
1845 | line[--line_len] = '\0'; /* \n */ | |
1846 | ||
1847 | sep = strrchr(line, 'x'); | |
1848 | if (sep == NULL) | |
1849 | continue; | |
1850 | ||
1851 | hex2u64(sep + 1, &start); | |
1852 | ||
1853 | sep = strchr(line, ' '); | |
1854 | if (sep == NULL) | |
1855 | continue; | |
1856 | ||
1857 | *sep = '\0'; | |
1858 | ||
1859 | snprintf(name, sizeof(name), "[%s]", line); | |
aeafcbaf | 1860 | map = machine__new_module(machine, start, name); |
b7cece76 | 1861 | if (map == NULL) |
439d473b | 1862 | goto out_delete_line; |
aeafcbaf | 1863 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
6cfcc53e | 1864 | } |
439d473b ACM |
1865 | |
1866 | free(line); | |
1867 | fclose(file); | |
1868 | ||
aeafcbaf | 1869 | return machine__set_modules_path(machine); |
439d473b ACM |
1870 | |
1871 | out_delete_line: | |
1872 | free(line); | |
1873 | out_failure: | |
1874 | return -1; | |
6cfcc53e MG |
1875 | } |
1876 | ||
aeafcbaf | 1877 | int dso__load_vmlinux(struct dso *dso, struct map *map, |
fd930ff9 | 1878 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1879 | { |
fbd733b8 | 1880 | int err = -1, fd; |
ec5761ea | 1881 | char symfs_vmlinux[PATH_MAX]; |
a2928c42 | 1882 | |
a639dc64 | 1883 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea DA |
1884 | symbol_conf.symfs, vmlinux); |
1885 | fd = open(symfs_vmlinux, O_RDONLY); | |
a2928c42 ACM |
1886 | if (fd < 0) |
1887 | return -1; | |
1888 | ||
aeafcbaf ACM |
1889 | dso__set_long_name(dso, (char *)vmlinux); |
1890 | dso__set_loaded(dso, map->type); | |
1891 | err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0); | |
a2928c42 ACM |
1892 | close(fd); |
1893 | ||
3846df2e | 1894 | if (err > 0) |
ec5761ea | 1895 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
3846df2e | 1896 | |
a2928c42 ACM |
1897 | return err; |
1898 | } | |
1899 | ||
aeafcbaf | 1900 | int dso__load_vmlinux_path(struct dso *dso, struct map *map, |
9de89fe7 | 1901 | symbol_filter_t filter) |
a19afe46 ACM |
1902 | { |
1903 | int i, err = 0; | |
5ad90e4e | 1904 | char *filename; |
a19afe46 ACM |
1905 | |
1906 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1907 | vmlinux_path__nr_entries + 1); |
1908 | ||
aeafcbaf | 1909 | filename = dso__build_id_filename(dso, NULL, 0); |
5ad90e4e | 1910 | if (filename != NULL) { |
aeafcbaf | 1911 | err = dso__load_vmlinux(dso, map, filename, filter); |
5ad90e4e | 1912 | if (err > 0) { |
aeafcbaf | 1913 | dso__set_long_name(dso, filename); |
5ad90e4e ACM |
1914 | goto out; |
1915 | } | |
1916 | free(filename); | |
1917 | } | |
a19afe46 ACM |
1918 | |
1919 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
aeafcbaf | 1920 | err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); |
a19afe46 | 1921 | if (err > 0) { |
aeafcbaf | 1922 | dso__set_long_name(dso, strdup(vmlinux_path[i])); |
a19afe46 ACM |
1923 | break; |
1924 | } | |
1925 | } | |
5ad90e4e | 1926 | out: |
a19afe46 ACM |
1927 | return err; |
1928 | } | |
1929 | ||
aeafcbaf | 1930 | static int dso__load_kernel_sym(struct dso *dso, struct map *map, |
9de89fe7 | 1931 | symbol_filter_t filter) |
a827c875 | 1932 | { |
cc612d81 | 1933 | int err; |
9e201442 ACM |
1934 | const char *kallsyms_filename = NULL; |
1935 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1936 | /* |
b226a5a7 DA |
1937 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1938 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1939 | * |
1940 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1941 | * build-id, or if the user specifies the wrong path to the right | |
1942 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1943 | * x86_86 one, on the machine where analysis is being performed, say), | |
1944 | * or worse, /proc/kallsyms. | |
1945 | * | |
1946 | * If the specified file _has_ a build-id and there is a build-id | |
1947 | * section in the perf.data file, we will still do the expected | |
1948 | * validation in dso__load_vmlinux and will bail out if they don't | |
1949 | * match. | |
1950 | */ | |
b226a5a7 DA |
1951 | if (symbol_conf.kallsyms_name != NULL) { |
1952 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1953 | goto do_kallsyms; | |
1954 | } | |
1955 | ||
dc8d6ab2 | 1956 | if (symbol_conf.vmlinux_name != NULL) { |
aeafcbaf | 1957 | err = dso__load_vmlinux(dso, map, |
dc8d6ab2 | 1958 | symbol_conf.vmlinux_name, filter); |
e7dadc00 | 1959 | if (err > 0) { |
aeafcbaf | 1960 | dso__set_long_name(dso, |
e7dadc00 ACM |
1961 | strdup(symbol_conf.vmlinux_name)); |
1962 | goto out_fixup; | |
1963 | } | |
1964 | return err; | |
dc8d6ab2 | 1965 | } |
cc612d81 ACM |
1966 | |
1967 | if (vmlinux_path != NULL) { | |
aeafcbaf | 1968 | err = dso__load_vmlinux_path(dso, map, filter); |
a19afe46 ACM |
1969 | if (err > 0) |
1970 | goto out_fixup; | |
cc612d81 ACM |
1971 | } |
1972 | ||
ec5761ea DA |
1973 | /* do not try local files if a symfs was given */ |
1974 | if (symbol_conf.symfs[0] != 0) | |
1975 | return -1; | |
1976 | ||
b7cece76 ACM |
1977 | /* |
1978 | * Say the kernel DSO was created when processing the build-id header table, | |
1979 | * we have a build-id, so check if it is the same as the running kernel, | |
1980 | * using it if it is. | |
1981 | */ | |
aeafcbaf | 1982 | if (dso->has_build_id) { |
b7cece76 | 1983 | u8 kallsyms_build_id[BUILD_ID_SIZE]; |
9e201442 | 1984 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1985 | |
1986 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1987 | sizeof(kallsyms_build_id)) == 0) { |
aeafcbaf | 1988 | if (dso__build_id_equal(dso, kallsyms_build_id)) { |
9e201442 | 1989 | kallsyms_filename = "/proc/kallsyms"; |
8d0591f6 | 1990 | goto do_kallsyms; |
9e201442 | 1991 | } |
8d0591f6 | 1992 | } |
dc8d6ab2 ACM |
1993 | /* |
1994 | * Now look if we have it on the build-id cache in | |
1995 | * $HOME/.debug/[kernel.kallsyms]. | |
1996 | */ | |
aeafcbaf | 1997 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), |
9e201442 ACM |
1998 | sbuild_id); |
1999 | ||
2000 | if (asprintf(&kallsyms_allocated_filename, | |
2001 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
2002 | getenv("HOME"), sbuild_id) == -1) { |
2003 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 2004 | return -1; |
3846df2e | 2005 | } |
dc8d6ab2 | 2006 | |
19fc2ded ACM |
2007 | kallsyms_filename = kallsyms_allocated_filename; |
2008 | ||
dc8d6ab2 | 2009 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
2010 | pr_err("No kallsyms or vmlinux with build-id %s " |
2011 | "was found\n", sbuild_id); | |
9e201442 | 2012 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 2013 | return -1; |
9e201442 | 2014 | } |
dc8d6ab2 ACM |
2015 | } else { |
2016 | /* | |
2017 | * Last resort, if we don't have a build-id and couldn't find | |
2018 | * any vmlinux file, try the running kernel kallsyms table. | |
2019 | */ | |
9e201442 | 2020 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 2021 | } |
439d473b | 2022 | |
cc612d81 | 2023 | do_kallsyms: |
aeafcbaf | 2024 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
3846df2e ACM |
2025 | if (err > 0) |
2026 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 2027 | free(kallsyms_allocated_filename); |
439d473b ACM |
2028 | |
2029 | if (err > 0) { | |
cc612d81 | 2030 | out_fixup: |
e1c7c6a4 | 2031 | if (kallsyms_filename != NULL) |
aeafcbaf | 2032 | dso__set_long_name(dso, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
2033 | map__fixup_start(map); |
2034 | map__fixup_end(map); | |
439d473b | 2035 | } |
94cb9e38 | 2036 | |
a827c875 ACM |
2037 | return err; |
2038 | } | |
2039 | ||
aeafcbaf ACM |
2040 | static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, |
2041 | symbol_filter_t filter) | |
a1645ce1 ZY |
2042 | { |
2043 | int err; | |
2044 | const char *kallsyms_filename = NULL; | |
23346f21 | 2045 | struct machine *machine; |
a1645ce1 ZY |
2046 | char path[PATH_MAX]; |
2047 | ||
2048 | if (!map->groups) { | |
2049 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
2050 | return -1; | |
2051 | } | |
23346f21 | 2052 | machine = map->groups->machine; |
a1645ce1 | 2053 | |
23346f21 | 2054 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2055 | /* |
2056 | * if the user specified a vmlinux filename, use it and only | |
2057 | * it, reporting errors to the user if it cannot be used. | |
2058 | * Or use file guest_kallsyms inputted by user on commandline | |
2059 | */ | |
2060 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
aeafcbaf | 2061 | err = dso__load_vmlinux(dso, map, |
a1645ce1 ZY |
2062 | symbol_conf.default_guest_vmlinux_name, filter); |
2063 | goto out_try_fixup; | |
2064 | } | |
2065 | ||
2066 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2067 | if (!kallsyms_filename) | |
2068 | return -1; | |
2069 | } else { | |
23346f21 | 2070 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2071 | kallsyms_filename = path; |
2072 | } | |
2073 | ||
aeafcbaf | 2074 | err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); |
a1645ce1 ZY |
2075 | if (err > 0) |
2076 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
2077 | ||
2078 | out_try_fixup: | |
2079 | if (err > 0) { | |
2080 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 2081 | machine__mmap_name(machine, path, sizeof(path)); |
aeafcbaf | 2082 | dso__set_long_name(dso, strdup(path)); |
a1645ce1 ZY |
2083 | } |
2084 | map__fixup_start(map); | |
2085 | map__fixup_end(map); | |
2086 | } | |
2087 | ||
2088 | return err; | |
2089 | } | |
cd84c2ac | 2090 | |
b0da954a | 2091 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 2092 | { |
b0da954a | 2093 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
2094 | } |
2095 | ||
b0da954a | 2096 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
2097 | { |
2098 | struct dso *pos; | |
2099 | ||
b0da954a | 2100 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 2101 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
2102 | return pos; |
2103 | return NULL; | |
2104 | } | |
2105 | ||
a89e5abe | 2106 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2107 | { |
a89e5abe | 2108 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2109 | |
e4204992 | 2110 | if (!dso) { |
00a192b3 | 2111 | dso = dso__new(name); |
cfc10d3b | 2112 | if (dso != NULL) { |
a89e5abe | 2113 | dsos__add(head, dso); |
cfc10d3b ACM |
2114 | dso__set_basename(dso); |
2115 | } | |
66bd8424 | 2116 | } |
cd84c2ac FW |
2117 | |
2118 | return dso; | |
cd84c2ac FW |
2119 | } |
2120 | ||
1f626bc3 | 2121 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2122 | { |
2123 | struct dso *pos; | |
cbf69680 | 2124 | size_t ret = 0; |
cd84c2ac | 2125 | |
95011c60 ACM |
2126 | list_for_each_entry(pos, head, node) { |
2127 | int i; | |
2128 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2129 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2130 | } |
cbf69680 ACM |
2131 | |
2132 | return ret; | |
cd84c2ac FW |
2133 | } |
2134 | ||
aeafcbaf | 2135 | size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp) |
b0da954a | 2136 | { |
a1645ce1 | 2137 | struct rb_node *nd; |
cbf69680 | 2138 | size_t ret = 0; |
a1645ce1 | 2139 | |
aeafcbaf | 2140 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2141 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2142 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2143 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2144 | } |
cbf69680 ACM |
2145 | |
2146 | return ret; | |
b0da954a ACM |
2147 | } |
2148 | ||
88d3d9b7 ACM |
2149 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2150 | bool with_hits) | |
9e03eb2d ACM |
2151 | { |
2152 | struct dso *pos; | |
2153 | size_t ret = 0; | |
2154 | ||
b0da954a | 2155 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2156 | if (with_hits && !pos->hit) |
2157 | continue; | |
9e03eb2d | 2158 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2159 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2160 | } |
2161 | return ret; | |
2162 | } | |
2163 | ||
aeafcbaf ACM |
2164 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
2165 | bool with_hits) | |
f869097e | 2166 | { |
aeafcbaf ACM |
2167 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) + |
2168 | __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits); | |
f869097e ACM |
2169 | } |
2170 | ||
aeafcbaf ACM |
2171 | size_t machines__fprintf_dsos_buildid(struct rb_root *machines, |
2172 | FILE *fp, bool with_hits) | |
b0da954a | 2173 | { |
a1645ce1 ZY |
2174 | struct rb_node *nd; |
2175 | size_t ret = 0; | |
2176 | ||
aeafcbaf | 2177 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
23346f21 | 2178 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2179 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2180 | } |
2181 | return ret; | |
b0da954a ACM |
2182 | } |
2183 | ||
f57b05ed JO |
2184 | static struct dso* |
2185 | dso__kernel_findnew(struct machine *machine, const char *name, | |
2186 | const char *short_name, int dso_type) | |
fd1d908c | 2187 | { |
f57b05ed JO |
2188 | /* |
2189 | * The kernel dso could be created by build_id processing. | |
2190 | */ | |
2191 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
a1645ce1 | 2192 | |
f57b05ed JO |
2193 | /* |
2194 | * We need to run this in all cases, since during the build_id | |
2195 | * processing we had no idea this was the kernel dso. | |
2196 | */ | |
aeafcbaf | 2197 | if (dso != NULL) { |
f57b05ed JO |
2198 | dso__set_short_name(dso, short_name); |
2199 | dso->kernel = dso_type; | |
fd1d908c ACM |
2200 | } |
2201 | ||
aeafcbaf | 2202 | return dso; |
fd1d908c ACM |
2203 | } |
2204 | ||
aeafcbaf | 2205 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
fd1d908c | 2206 | { |
a1645ce1 ZY |
2207 | char path[PATH_MAX]; |
2208 | ||
23346f21 | 2209 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2210 | return; |
23346f21 | 2211 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
aeafcbaf ACM |
2212 | if (sysfs__read_build_id(path, dso->build_id, |
2213 | sizeof(dso->build_id)) == 0) | |
2214 | dso->has_build_id = true; | |
fd1d908c ACM |
2215 | } |
2216 | ||
f57b05ed | 2217 | static struct dso *machine__get_kernel(struct machine *machine) |
cd84c2ac | 2218 | { |
a1645ce1 ZY |
2219 | const char *vmlinux_name = NULL; |
2220 | struct dso *kernel; | |
cd84c2ac | 2221 | |
aeafcbaf | 2222 | if (machine__is_host(machine)) { |
a1645ce1 | 2223 | vmlinux_name = symbol_conf.vmlinux_name; |
f57b05ed JO |
2224 | if (!vmlinux_name) |
2225 | vmlinux_name = "[kernel.kallsyms]"; | |
2226 | ||
2227 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2228 | "[kernel]", | |
2229 | DSO_TYPE_KERNEL); | |
a1645ce1 | 2230 | } else { |
f57b05ed JO |
2231 | char bf[PATH_MAX]; |
2232 | ||
aeafcbaf | 2233 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2234 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
f57b05ed JO |
2235 | if (!vmlinux_name) |
2236 | vmlinux_name = machine__mmap_name(machine, bf, | |
2237 | sizeof(bf)); | |
2238 | ||
2239 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
2240 | "[guest.kernel]", | |
2241 | DSO_TYPE_GUEST_KERNEL); | |
8d92c02a | 2242 | } |
cd84c2ac | 2243 | |
f57b05ed | 2244 | if (kernel != NULL && (!kernel->has_build_id)) |
aeafcbaf | 2245 | dso__read_running_kernel_build_id(kernel, machine); |
f57b05ed | 2246 | |
f1dfa0b1 | 2247 | return kernel; |
f1dfa0b1 ACM |
2248 | } |
2249 | ||
d214afbd ML |
2250 | struct process_args { |
2251 | u64 start; | |
2252 | }; | |
2253 | ||
2254 | static int symbol__in_kernel(void *arg, const char *name, | |
3b01a413 | 2255 | char type __used, u64 start, u64 end __used) |
d214afbd ML |
2256 | { |
2257 | struct process_args *args = arg; | |
2258 | ||
2259 | if (strchr(name, '[')) | |
2260 | return 0; | |
2261 | ||
2262 | args->start = start; | |
2263 | return 1; | |
2264 | } | |
2265 | ||
2266 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
2267 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
2268 | { | |
2269 | const char *filename; | |
2270 | char path[PATH_MAX]; | |
2271 | struct process_args args; | |
2272 | ||
2273 | if (machine__is_host(machine)) { | |
2274 | filename = "/proc/kallsyms"; | |
2275 | } else { | |
2276 | if (machine__is_default_guest(machine)) | |
2277 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
2278 | else { | |
2279 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
2280 | filename = path; | |
2281 | } | |
2282 | } | |
2283 | ||
ec80fde7 ACM |
2284 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
2285 | return 0; | |
2286 | ||
d214afbd ML |
2287 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
2288 | return 0; | |
2289 | ||
2290 | return args.start; | |
2291 | } | |
2292 | ||
aeafcbaf | 2293 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
f1dfa0b1 | 2294 | { |
de176489 | 2295 | enum map_type type; |
aeafcbaf | 2296 | u64 start = machine__get_kernel_start_addr(machine); |
f1dfa0b1 | 2297 | |
de176489 | 2298 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2299 | struct kmap *kmap; |
2300 | ||
aeafcbaf ACM |
2301 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
2302 | if (machine->vmlinux_maps[type] == NULL) | |
de176489 | 2303 | return -1; |
f1dfa0b1 | 2304 | |
aeafcbaf ACM |
2305 | machine->vmlinux_maps[type]->map_ip = |
2306 | machine->vmlinux_maps[type]->unmap_ip = | |
2307 | identity__map_ip; | |
2308 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
2309 | kmap->kmaps = &machine->kmaps; | |
2310 | map_groups__insert(&machine->kmaps, | |
2311 | machine->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2312 | } |
2313 | ||
f1dfa0b1 | 2314 | return 0; |
2446042c ACM |
2315 | } |
2316 | ||
aeafcbaf | 2317 | void machine__destroy_kernel_maps(struct machine *machine) |
076c6e45 ACM |
2318 | { |
2319 | enum map_type type; | |
2320 | ||
2321 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2322 | struct kmap *kmap; | |
2323 | ||
aeafcbaf | 2324 | if (machine->vmlinux_maps[type] == NULL) |
076c6e45 ACM |
2325 | continue; |
2326 | ||
aeafcbaf ACM |
2327 | kmap = map__kmap(machine->vmlinux_maps[type]); |
2328 | map_groups__remove(&machine->kmaps, | |
2329 | machine->vmlinux_maps[type]); | |
076c6e45 ACM |
2330 | if (kmap->ref_reloc_sym) { |
2331 | /* | |
2332 | * ref_reloc_sym is shared among all maps, so free just | |
2333 | * on one of them. | |
2334 | */ | |
2335 | if (type == MAP__FUNCTION) { | |
2336 | free((char *)kmap->ref_reloc_sym->name); | |
2337 | kmap->ref_reloc_sym->name = NULL; | |
2338 | free(kmap->ref_reloc_sym); | |
2339 | } | |
2340 | kmap->ref_reloc_sym = NULL; | |
2341 | } | |
2342 | ||
aeafcbaf ACM |
2343 | map__delete(machine->vmlinux_maps[type]); |
2344 | machine->vmlinux_maps[type] = NULL; | |
076c6e45 ACM |
2345 | } |
2346 | } | |
2347 | ||
aeafcbaf | 2348 | int machine__create_kernel_maps(struct machine *machine) |
5c0541d5 | 2349 | { |
f57b05ed | 2350 | struct dso *kernel = machine__get_kernel(machine); |
5c0541d5 ACM |
2351 | |
2352 | if (kernel == NULL || | |
aeafcbaf | 2353 | __machine__create_kernel_maps(machine, kernel) < 0) |
5c0541d5 ACM |
2354 | return -1; |
2355 | ||
aeafcbaf | 2356 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) |
5c0541d5 ACM |
2357 | pr_debug("Problems creating module maps, continuing anyway...\n"); |
2358 | /* | |
2359 | * Now that we have all the maps created, just set the ->end of them: | |
2360 | */ | |
aeafcbaf | 2361 | map_groups__fixup_end(&machine->kmaps); |
5c0541d5 ACM |
2362 | return 0; |
2363 | } | |
2364 | ||
cc612d81 ACM |
2365 | static void vmlinux_path__exit(void) |
2366 | { | |
2367 | while (--vmlinux_path__nr_entries >= 0) { | |
2368 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2369 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2370 | } | |
2371 | ||
2372 | free(vmlinux_path); | |
2373 | vmlinux_path = NULL; | |
2374 | } | |
2375 | ||
2376 | static int vmlinux_path__init(void) | |
2377 | { | |
2378 | struct utsname uts; | |
2379 | char bf[PATH_MAX]; | |
2380 | ||
cc612d81 ACM |
2381 | vmlinux_path = malloc(sizeof(char *) * 5); |
2382 | if (vmlinux_path == NULL) | |
2383 | return -1; | |
2384 | ||
2385 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2386 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2387 | goto out_fail; | |
2388 | ++vmlinux_path__nr_entries; | |
2389 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2390 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2391 | goto out_fail; | |
2392 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
2393 | |
2394 | /* only try running kernel version if no symfs was given */ | |
2395 | if (symbol_conf.symfs[0] != 0) | |
2396 | return 0; | |
2397 | ||
2398 | if (uname(&uts) < 0) | |
2399 | return -1; | |
2400 | ||
cc612d81 ACM |
2401 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
2402 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2403 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2404 | goto out_fail; | |
2405 | ++vmlinux_path__nr_entries; | |
2406 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2407 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2408 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2409 | goto out_fail; | |
2410 | ++vmlinux_path__nr_entries; | |
2411 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2412 | uts.release); | |
2413 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2414 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2415 | goto out_fail; | |
2416 | ++vmlinux_path__nr_entries; | |
2417 | ||
2418 | return 0; | |
2419 | ||
2420 | out_fail: | |
2421 | vmlinux_path__exit(); | |
2422 | return -1; | |
2423 | } | |
2424 | ||
aeafcbaf | 2425 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
b0a9ab62 ACM |
2426 | { |
2427 | int i; | |
2428 | size_t printed = 0; | |
aeafcbaf | 2429 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
5ad90e4e ACM |
2430 | |
2431 | if (kdso->has_build_id) { | |
2432 | char filename[PATH_MAX]; | |
2433 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2434 | printed += fprintf(fp, "[0] %s\n", filename); | |
2435 | } | |
b0a9ab62 ACM |
2436 | |
2437 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2438 | printed += fprintf(fp, "[%d] %s\n", |
2439 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2440 | |
2441 | return printed; | |
2442 | } | |
2443 | ||
655000e7 ACM |
2444 | static int setup_list(struct strlist **list, const char *list_str, |
2445 | const char *list_name) | |
2446 | { | |
2447 | if (list_str == NULL) | |
2448 | return 0; | |
2449 | ||
2450 | *list = strlist__new(true, list_str); | |
2451 | if (!*list) { | |
2452 | pr_err("problems parsing %s list\n", list_name); | |
2453 | return -1; | |
2454 | } | |
2455 | return 0; | |
2456 | } | |
2457 | ||
ec80fde7 ACM |
2458 | static bool symbol__read_kptr_restrict(void) |
2459 | { | |
2460 | bool value = false; | |
2461 | ||
2462 | if (geteuid() != 0) { | |
2463 | FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); | |
2464 | if (fp != NULL) { | |
2465 | char line[8]; | |
2466 | ||
2467 | if (fgets(line, sizeof(line), fp) != NULL) | |
2468 | value = atoi(line) != 0; | |
2469 | ||
2470 | fclose(fp); | |
2471 | } | |
2472 | } | |
2473 | ||
2474 | return value; | |
2475 | } | |
2476 | ||
75be6cf4 | 2477 | int symbol__init(void) |
2446042c | 2478 | { |
ec5761ea DA |
2479 | const char *symfs; |
2480 | ||
85e00b55 JZ |
2481 | if (symbol_conf.initialized) |
2482 | return 0; | |
2483 | ||
4d439517 DM |
2484 | symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); |
2485 | ||
95011c60 | 2486 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2487 | if (symbol_conf.sort_by_name) |
2488 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2489 | sizeof(struct symbol)); | |
b32d133a | 2490 | |
75be6cf4 | 2491 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2492 | return -1; |
2493 | ||
c410a338 ACM |
2494 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2495 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2496 | return -1; | |
2497 | } | |
2498 | ||
655000e7 ACM |
2499 | if (setup_list(&symbol_conf.dso_list, |
2500 | symbol_conf.dso_list_str, "dso") < 0) | |
2501 | return -1; | |
2502 | ||
2503 | if (setup_list(&symbol_conf.comm_list, | |
2504 | symbol_conf.comm_list_str, "comm") < 0) | |
2505 | goto out_free_dso_list; | |
2506 | ||
2507 | if (setup_list(&symbol_conf.sym_list, | |
2508 | symbol_conf.sym_list_str, "symbol") < 0) | |
2509 | goto out_free_comm_list; | |
2510 | ||
ec5761ea DA |
2511 | /* |
2512 | * A path to symbols of "/" is identical to "" | |
2513 | * reset here for simplicity. | |
2514 | */ | |
2515 | symfs = realpath(symbol_conf.symfs, NULL); | |
2516 | if (symfs == NULL) | |
2517 | symfs = symbol_conf.symfs; | |
2518 | if (strcmp(symfs, "/") == 0) | |
2519 | symbol_conf.symfs = ""; | |
2520 | if (symfs != symbol_conf.symfs) | |
2521 | free((void *)symfs); | |
2522 | ||
ec80fde7 ACM |
2523 | symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); |
2524 | ||
85e00b55 | 2525 | symbol_conf.initialized = true; |
4aa65636 | 2526 | return 0; |
655000e7 ACM |
2527 | |
2528 | out_free_dso_list: | |
2529 | strlist__delete(symbol_conf.dso_list); | |
2530 | out_free_comm_list: | |
2531 | strlist__delete(symbol_conf.comm_list); | |
2532 | return -1; | |
4aa65636 ACM |
2533 | } |
2534 | ||
d65a458b ACM |
2535 | void symbol__exit(void) |
2536 | { | |
85e00b55 JZ |
2537 | if (!symbol_conf.initialized) |
2538 | return; | |
d65a458b ACM |
2539 | strlist__delete(symbol_conf.sym_list); |
2540 | strlist__delete(symbol_conf.dso_list); | |
2541 | strlist__delete(symbol_conf.comm_list); | |
2542 | vmlinux_path__exit(); | |
2543 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2544 | symbol_conf.initialized = false; |
d65a458b ACM |
2545 | } |
2546 | ||
aeafcbaf | 2547 | int machines__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2548 | { |
aeafcbaf | 2549 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2550 | |
23346f21 | 2551 | if (machine == NULL) |
a1645ce1 | 2552 | return -1; |
cc612d81 | 2553 | |
5c0541d5 | 2554 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2555 | } |
5aab621b ACM |
2556 | |
2557 | static int hex(char ch) | |
2558 | { | |
2559 | if ((ch >= '0') && (ch <= '9')) | |
2560 | return ch - '0'; | |
2561 | if ((ch >= 'a') && (ch <= 'f')) | |
2562 | return ch - 'a' + 10; | |
2563 | if ((ch >= 'A') && (ch <= 'F')) | |
2564 | return ch - 'A' + 10; | |
2565 | return -1; | |
2566 | } | |
2567 | ||
2568 | /* | |
2569 | * While we find nice hex chars, build a long_val. | |
2570 | * Return number of chars processed. | |
2571 | */ | |
2572 | int hex2u64(const char *ptr, u64 *long_val) | |
2573 | { | |
2574 | const char *p = ptr; | |
2575 | *long_val = 0; | |
2576 | ||
2577 | while (*p) { | |
2578 | const int hex_val = hex(*p); | |
2579 | ||
2580 | if (hex_val < 0) | |
2581 | break; | |
2582 | ||
2583 | *long_val = (*long_val << 4) | hex_val; | |
2584 | p++; | |
2585 | } | |
2586 | ||
2587 | return p - ptr; | |
2588 | } | |
2589 | ||
2590 | char *strxfrchar(char *s, char from, char to) | |
2591 | { | |
2592 | char *p = s; | |
2593 | ||
2594 | while ((p = strchr(p, from)) != NULL) | |
2595 | *p++ = to; | |
2596 | ||
2597 | return s; | |
2598 | } | |
a1645ce1 | 2599 | |
aeafcbaf | 2600 | int machines__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2601 | { |
2602 | int ret = 0; | |
2603 | struct dirent **namelist = NULL; | |
2604 | int i, items = 0; | |
2605 | char path[PATH_MAX]; | |
2606 | pid_t pid; | |
2607 | ||
2608 | if (symbol_conf.default_guest_vmlinux_name || | |
2609 | symbol_conf.default_guest_modules || | |
2610 | symbol_conf.default_guest_kallsyms) { | |
aeafcbaf | 2611 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2612 | } |
2613 | ||
2614 | if (symbol_conf.guestmount) { | |
2615 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2616 | if (items <= 0) | |
2617 | return -ENOENT; | |
2618 | for (i = 0; i < items; i++) { | |
2619 | if (!isdigit(namelist[i]->d_name[0])) { | |
2620 | /* Filter out . and .. */ | |
2621 | continue; | |
2622 | } | |
2623 | pid = atoi(namelist[i]->d_name); | |
2624 | sprintf(path, "%s/%s/proc/kallsyms", | |
2625 | symbol_conf.guestmount, | |
2626 | namelist[i]->d_name); | |
2627 | ret = access(path, R_OK); | |
2628 | if (ret) { | |
2629 | pr_debug("Can't access file %s\n", path); | |
2630 | goto failure; | |
2631 | } | |
aeafcbaf | 2632 | machines__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2633 | } |
2634 | failure: | |
2635 | free(namelist); | |
2636 | } | |
2637 | ||
2638 | return ret; | |
2639 | } | |
5c0541d5 | 2640 | |
aeafcbaf | 2641 | void machines__destroy_guest_kernel_maps(struct rb_root *machines) |
076c6e45 | 2642 | { |
aeafcbaf | 2643 | struct rb_node *next = rb_first(machines); |
076c6e45 ACM |
2644 | |
2645 | while (next) { | |
2646 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2647 | ||
2648 | next = rb_next(&pos->rb_node); | |
aeafcbaf | 2649 | rb_erase(&pos->rb_node, machines); |
076c6e45 ACM |
2650 | machine__delete(pos); |
2651 | } | |
2652 | } | |
2653 | ||
aeafcbaf | 2654 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
5c0541d5 ACM |
2655 | enum map_type type, symbol_filter_t filter) |
2656 | { | |
aeafcbaf | 2657 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2658 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
2659 | ||
2660 | if (ret > 0) { | |
2661 | dso__set_loaded(map->dso, type); | |
2662 | /* | |
2663 | * Since /proc/kallsyms will have multiple sessions for the | |
2664 | * kernel, with modules between them, fixup the end of all | |
2665 | * sections. | |
2666 | */ | |
aeafcbaf | 2667 | __map_groups__fixup_end(&machine->kmaps, type); |
5c0541d5 ACM |
2668 | } |
2669 | ||
2670 | return ret; | |
2671 | } | |
2672 | ||
aeafcbaf | 2673 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
5c0541d5 ACM |
2674 | symbol_filter_t filter) |
2675 | { | |
aeafcbaf | 2676 | struct map *map = machine->vmlinux_maps[type]; |
5c0541d5 ACM |
2677 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
2678 | ||
2679 | if (ret > 0) { | |
2680 | dso__set_loaded(map->dso, type); | |
2681 | map__reloc_vmlinux(map); | |
2682 | } | |
2683 | ||
2684 | return ret; | |
2685 | } |