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Commit | Line | Data |
---|---|---|
a2928c42 ACM |
1 | #include "util.h" |
2 | #include "../perf.h" | |
a0055ae2 | 3 | #include "string.h" |
a2928c42 | 4 | #include "symbol.h" |
439d473b | 5 | #include "thread.h" |
a2928c42 | 6 | |
8f28827a FW |
7 | #include "debug.h" |
8 | ||
a2928c42 ACM |
9 | #include <libelf.h> |
10 | #include <gelf.h> | |
11 | #include <elf.h> | |
439d473b | 12 | #include <sys/utsname.h> |
2cdbc46d | 13 | |
0b73da3f IM |
14 | const char *sym_hist_filter; |
15 | ||
94cb9e38 ACM |
16 | enum dso_origin { |
17 | DSO__ORIG_KERNEL = 0, | |
18 | DSO__ORIG_JAVA_JIT, | |
19 | DSO__ORIG_FEDORA, | |
20 | DSO__ORIG_UBUNTU, | |
21 | DSO__ORIG_BUILDID, | |
22 | DSO__ORIG_DSO, | |
439d473b | 23 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
24 | DSO__ORIG_NOT_FOUND, |
25 | }; | |
26 | ||
439d473b ACM |
27 | static void dsos__add(struct dso *dso); |
28 | static struct dso *dsos__find(const char *name); | |
29 | ||
af427bf5 ACM |
30 | static struct rb_root kernel_maps; |
31 | ||
32 | static void dso__set_symbols_end(struct dso *self) | |
33 | { | |
34 | struct rb_node *nd, *prevnd = rb_first(&self->syms); | |
35 | ||
36 | if (prevnd == NULL) | |
37 | return; | |
38 | ||
39 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
40 | struct symbol *prev = rb_entry(prevnd, struct symbol, rb_node), | |
41 | *curr = rb_entry(nd, struct symbol, rb_node); | |
42 | ||
43 | if (prev->end == prev->start) | |
44 | prev->end = curr->start - 1; | |
45 | prevnd = nd; | |
46 | } | |
47 | } | |
48 | ||
49 | static void kernel_maps__fixup_sym_end(void) | |
50 | { | |
51 | struct map *prev, *curr; | |
52 | struct rb_node *nd, *prevnd = rb_first(&kernel_maps); | |
53 | ||
54 | if (prevnd == NULL) | |
55 | return; | |
56 | ||
57 | curr = rb_entry(prevnd, struct map, rb_node); | |
58 | dso__set_symbols_end(curr->dso); | |
59 | ||
60 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
61 | prev = curr; | |
62 | curr = rb_entry(nd, struct map, rb_node); | |
63 | prev->end = curr->start - 1; | |
64 | dso__set_symbols_end(curr->dso); | |
65 | } | |
66 | } | |
67 | ||
439d473b ACM |
68 | static struct symbol *symbol__new(u64 start, u64 len, const char *name, |
69 | unsigned int priv_size, int v) | |
a2928c42 | 70 | { |
0085c954 | 71 | size_t namelen = strlen(name) + 1; |
0b73da3f | 72 | struct symbol *self = calloc(1, priv_size + sizeof(*self) + namelen); |
a2928c42 | 73 | |
0b73da3f IM |
74 | if (!self) |
75 | return NULL; | |
76 | ||
da21d1b5 | 77 | if (v > 2) |
439d473b ACM |
78 | printf("new symbol: %016Lx [%08lx]: %s, hist: %p\n", |
79 | start, (unsigned long)len, name, self->hist); | |
0b73da3f | 80 | |
0b73da3f IM |
81 | self->hist = NULL; |
82 | self->hist_sum = 0; | |
83 | ||
84 | if (sym_hist_filter && !strcmp(name, sym_hist_filter)) | |
9cffa8d5 | 85 | self->hist = calloc(sizeof(u64), len); |
0b73da3f IM |
86 | |
87 | if (priv_size) { | |
88 | memset(self, 0, priv_size); | |
89 | self = ((void *)self) + priv_size; | |
a2928c42 | 90 | } |
0b73da3f | 91 | self->start = start; |
6cfcc53e | 92 | self->end = len ? start + len - 1 : start; |
0b73da3f | 93 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
94 | |
95 | return self; | |
96 | } | |
97 | ||
0085c954 | 98 | static void symbol__delete(struct symbol *self, unsigned int priv_size) |
a2928c42 | 99 | { |
0085c954 | 100 | free(((void *)self) - priv_size); |
a2928c42 ACM |
101 | } |
102 | ||
103 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
104 | { | |
439d473b | 105 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
106 | self->start, self->end, self->name); |
107 | } | |
108 | ||
0085c954 | 109 | struct dso *dso__new(const char *name, unsigned int sym_priv_size) |
a2928c42 ACM |
110 | { |
111 | struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); | |
112 | ||
113 | if (self != NULL) { | |
114 | strcpy(self->name, name); | |
439d473b ACM |
115 | self->long_name = self->name; |
116 | self->short_name = self->name; | |
a2928c42 | 117 | self->syms = RB_ROOT; |
0085c954 | 118 | self->sym_priv_size = sym_priv_size; |
fc54db51 | 119 | self->find_symbol = dso__find_symbol; |
52d422de | 120 | self->slen_calculated = 0; |
94cb9e38 | 121 | self->origin = DSO__ORIG_NOT_FOUND; |
a2928c42 ACM |
122 | } |
123 | ||
124 | return self; | |
125 | } | |
126 | ||
127 | static void dso__delete_symbols(struct dso *self) | |
128 | { | |
129 | struct symbol *pos; | |
130 | struct rb_node *next = rb_first(&self->syms); | |
131 | ||
132 | while (next) { | |
133 | pos = rb_entry(next, struct symbol, rb_node); | |
134 | next = rb_next(&pos->rb_node); | |
c8c96525 | 135 | rb_erase(&pos->rb_node, &self->syms); |
0085c954 | 136 | symbol__delete(pos, self->sym_priv_size); |
a2928c42 ACM |
137 | } |
138 | } | |
139 | ||
140 | void dso__delete(struct dso *self) | |
141 | { | |
142 | dso__delete_symbols(self); | |
439d473b ACM |
143 | if (self->long_name != self->name) |
144 | free(self->long_name); | |
a2928c42 ACM |
145 | free(self); |
146 | } | |
147 | ||
148 | static void dso__insert_symbol(struct dso *self, struct symbol *sym) | |
149 | { | |
150 | struct rb_node **p = &self->syms.rb_node; | |
151 | struct rb_node *parent = NULL; | |
9cffa8d5 | 152 | const u64 ip = sym->start; |
a2928c42 ACM |
153 | struct symbol *s; |
154 | ||
155 | while (*p != NULL) { | |
156 | parent = *p; | |
157 | s = rb_entry(parent, struct symbol, rb_node); | |
158 | if (ip < s->start) | |
159 | p = &(*p)->rb_left; | |
160 | else | |
161 | p = &(*p)->rb_right; | |
162 | } | |
163 | rb_link_node(&sym->rb_node, parent, p); | |
164 | rb_insert_color(&sym->rb_node, &self->syms); | |
165 | } | |
166 | ||
9cffa8d5 | 167 | struct symbol *dso__find_symbol(struct dso *self, u64 ip) |
a2928c42 ACM |
168 | { |
169 | struct rb_node *n; | |
170 | ||
171 | if (self == NULL) | |
172 | return NULL; | |
173 | ||
174 | n = self->syms.rb_node; | |
175 | ||
176 | while (n) { | |
177 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
178 | ||
179 | if (ip < s->start) | |
180 | n = n->rb_left; | |
181 | else if (ip > s->end) | |
182 | n = n->rb_right; | |
183 | else | |
184 | return s; | |
185 | } | |
186 | ||
187 | return NULL; | |
188 | } | |
189 | ||
190 | size_t dso__fprintf(struct dso *self, FILE *fp) | |
191 | { | |
a2a99e8e | 192 | size_t ret = fprintf(fp, "dso: %s\n", self->short_name); |
a2928c42 ACM |
193 | |
194 | struct rb_node *nd; | |
195 | for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) { | |
196 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
197 | ret += symbol__fprintf(pos, fp); | |
198 | } | |
199 | ||
200 | return ret; | |
201 | } | |
202 | ||
af427bf5 | 203 | static int maps__load_kallsyms(symbol_filter_t filter, int use_modules, int v) |
a2928c42 | 204 | { |
af427bf5 | 205 | struct map *map = kernel_map; |
a2928c42 ACM |
206 | char *line = NULL; |
207 | size_t n; | |
208 | FILE *file = fopen("/proc/kallsyms", "r"); | |
9974f496 | 209 | int count = 0; |
a2928c42 ACM |
210 | |
211 | if (file == NULL) | |
212 | goto out_failure; | |
213 | ||
214 | while (!feof(file)) { | |
9cffa8d5 | 215 | u64 start; |
a2928c42 ACM |
216 | struct symbol *sym; |
217 | int line_len, len; | |
218 | char symbol_type; | |
af427bf5 | 219 | char *module, *symbol_name; |
a2928c42 ACM |
220 | |
221 | line_len = getline(&line, &n, file); | |
222 | if (line_len < 0) | |
223 | break; | |
224 | ||
225 | if (!line) | |
226 | goto out_failure; | |
227 | ||
228 | line[--line_len] = '\0'; /* \n */ | |
229 | ||
a0055ae2 | 230 | len = hex2u64(line, &start); |
a2928c42 ACM |
231 | |
232 | len++; | |
233 | if (len + 2 >= line_len) | |
234 | continue; | |
235 | ||
236 | symbol_type = toupper(line[len]); | |
237 | /* | |
238 | * We're interested only in code ('T'ext) | |
239 | */ | |
240 | if (symbol_type != 'T' && symbol_type != 'W') | |
241 | continue; | |
af427bf5 ACM |
242 | |
243 | symbol_name = line + len + 2; | |
244 | module = strchr(symbol_name, '\t'); | |
245 | if (module) { | |
246 | char *module_name_end; | |
247 | ||
248 | if (!use_modules) | |
249 | continue; | |
250 | *module = '\0'; | |
251 | module = strchr(module + 1, '['); | |
252 | if (!module) | |
253 | continue; | |
254 | module_name_end = strchr(module + 1, ']'); | |
255 | if (!module_name_end) | |
256 | continue; | |
257 | *(module_name_end + 1) = '\0'; | |
258 | if (strcmp(map->dso->name, module)) { | |
259 | map = kernel_maps__find_by_dso_name(module); | |
260 | if (!map) { | |
261 | fputs("/proc/{kallsyms,modules} " | |
262 | "inconsistency!\n", stderr); | |
263 | return -1; | |
264 | } | |
265 | } | |
266 | start = map->map_ip(map, start); | |
267 | } else | |
268 | map = kernel_map; | |
a2928c42 ACM |
269 | /* |
270 | * Well fix up the end later, when we have all sorted. | |
271 | */ | |
af427bf5 ACM |
272 | sym = symbol__new(start, 0, symbol_name, |
273 | map->dso->sym_priv_size, v); | |
a2928c42 ACM |
274 | |
275 | if (sym == NULL) | |
276 | goto out_delete_line; | |
277 | ||
439d473b | 278 | if (filter && filter(map, sym)) |
af427bf5 | 279 | symbol__delete(sym, map->dso->sym_priv_size); |
9974f496 | 280 | else { |
af427bf5 | 281 | dso__insert_symbol(map->dso, sym); |
9974f496 MG |
282 | count++; |
283 | } | |
a2928c42 ACM |
284 | } |
285 | ||
a2928c42 ACM |
286 | free(line); |
287 | fclose(file); | |
288 | ||
9974f496 | 289 | return count; |
a2928c42 ACM |
290 | |
291 | out_delete_line: | |
292 | free(line); | |
293 | out_failure: | |
294 | return -1; | |
295 | } | |
296 | ||
af427bf5 ACM |
297 | static size_t kernel_maps__fprintf(FILE *fp) |
298 | { | |
299 | size_t printed = fprintf(stderr, "Kernel maps:\n"); | |
300 | struct rb_node *nd; | |
301 | ||
302 | printed += map__fprintf(kernel_map, fp); | |
303 | printed += dso__fprintf(kernel_map->dso, fp); | |
304 | ||
305 | for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) { | |
306 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
307 | ||
308 | printed += map__fprintf(pos, fp); | |
309 | printed += dso__fprintf(pos->dso, fp); | |
310 | } | |
311 | ||
312 | return printed + fprintf(stderr, "END kernel maps\n"); | |
313 | } | |
314 | ||
439d473b ACM |
315 | static int dso__load_perf_map(struct dso *self, struct map *map, |
316 | symbol_filter_t filter, int v) | |
80d496be PE |
317 | { |
318 | char *line = NULL; | |
319 | size_t n; | |
320 | FILE *file; | |
321 | int nr_syms = 0; | |
322 | ||
439d473b | 323 | file = fopen(self->long_name, "r"); |
80d496be PE |
324 | if (file == NULL) |
325 | goto out_failure; | |
326 | ||
327 | while (!feof(file)) { | |
9cffa8d5 | 328 | u64 start, size; |
80d496be PE |
329 | struct symbol *sym; |
330 | int line_len, len; | |
331 | ||
332 | line_len = getline(&line, &n, file); | |
333 | if (line_len < 0) | |
334 | break; | |
335 | ||
336 | if (!line) | |
337 | goto out_failure; | |
338 | ||
339 | line[--line_len] = '\0'; /* \n */ | |
340 | ||
341 | len = hex2u64(line, &start); | |
342 | ||
343 | len++; | |
344 | if (len + 2 >= line_len) | |
345 | continue; | |
346 | ||
347 | len += hex2u64(line + len, &size); | |
348 | ||
349 | len++; | |
350 | if (len + 2 >= line_len) | |
351 | continue; | |
352 | ||
353 | sym = symbol__new(start, size, line + len, | |
439d473b | 354 | self->sym_priv_size, v); |
80d496be PE |
355 | |
356 | if (sym == NULL) | |
357 | goto out_delete_line; | |
358 | ||
439d473b | 359 | if (filter && filter(map, sym)) |
80d496be PE |
360 | symbol__delete(sym, self->sym_priv_size); |
361 | else { | |
362 | dso__insert_symbol(self, sym); | |
363 | nr_syms++; | |
364 | } | |
365 | } | |
366 | ||
367 | free(line); | |
368 | fclose(file); | |
369 | ||
370 | return nr_syms; | |
371 | ||
372 | out_delete_line: | |
373 | free(line); | |
374 | out_failure: | |
375 | return -1; | |
376 | } | |
377 | ||
a2928c42 ACM |
378 | /** |
379 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
380 | * | |
381 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 382 | * @idx: uint32_t idx |
a2928c42 ACM |
383 | * @sym: GElf_Sym iterator |
384 | */ | |
83a0944f IM |
385 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
386 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
387 | idx < nr_syms; \ | |
388 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
389 | |
390 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
391 | { | |
392 | return GELF_ST_TYPE(sym->st_info); | |
393 | } | |
394 | ||
395 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
396 | { | |
397 | return elf_sym__type(sym) == STT_FUNC && | |
398 | sym->st_name != 0 && | |
81833130 | 399 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
400 | } |
401 | ||
6cfcc53e MG |
402 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
403 | { | |
404 | return elf_sym__type(sym) == STT_NOTYPE && | |
405 | sym->st_name != 0 && | |
406 | sym->st_shndx != SHN_UNDEF && | |
407 | sym->st_shndx != SHN_ABS; | |
408 | } | |
409 | ||
410 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
411 | const Elf_Data *secstrs) | |
412 | { | |
413 | return secstrs->d_buf + shdr->sh_name; | |
414 | } | |
415 | ||
416 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
417 | const Elf_Data *secstrs) | |
418 | { | |
419 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
420 | } | |
421 | ||
a2928c42 ACM |
422 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
423 | const Elf_Data *symstrs) | |
424 | { | |
425 | return symstrs->d_buf + sym->st_name; | |
426 | } | |
427 | ||
428 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
429 | GElf_Shdr *shp, const char *name, | |
83a0944f | 430 | size_t *idx) |
a2928c42 ACM |
431 | { |
432 | Elf_Scn *sec = NULL; | |
433 | size_t cnt = 1; | |
434 | ||
435 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
436 | char *str; | |
437 | ||
438 | gelf_getshdr(sec, shp); | |
439 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
440 | if (!strcmp(name, str)) { | |
83a0944f IM |
441 | if (idx) |
442 | *idx = cnt; | |
a2928c42 ACM |
443 | break; |
444 | } | |
445 | ++cnt; | |
446 | } | |
447 | ||
448 | return sec; | |
449 | } | |
450 | ||
8ce998d6 ACM |
451 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
452 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
453 | idx < nr_entries; \ | |
454 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
455 | ||
456 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
457 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
458 | idx < nr_entries; \ | |
459 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
460 | ||
a25e46c4 ACM |
461 | /* |
462 | * We need to check if we have a .dynsym, so that we can handle the | |
463 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
464 | * .dynsym or .symtab). | |
465 | * And always look at the original dso, not at debuginfo packages, that | |
466 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
467 | */ | |
83a0944f | 468 | static int dso__synthesize_plt_symbols(struct dso *self, int v) |
8ce998d6 ACM |
469 | { |
470 | uint32_t nr_rel_entries, idx; | |
471 | GElf_Sym sym; | |
9cffa8d5 | 472 | u64 plt_offset; |
8ce998d6 ACM |
473 | GElf_Shdr shdr_plt; |
474 | struct symbol *f; | |
a25e46c4 | 475 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 476 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
477 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
478 | size_t dynsym_idx; | |
479 | GElf_Ehdr ehdr; | |
8ce998d6 | 480 | char sympltname[1024]; |
a25e46c4 ACM |
481 | Elf *elf; |
482 | int nr = 0, symidx, fd, err = 0; | |
483 | ||
439d473b | 484 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
485 | if (fd < 0) |
486 | goto out; | |
487 | ||
488 | elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); | |
489 | if (elf == NULL) | |
490 | goto out_close; | |
491 | ||
492 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
493 | goto out_elf_end; | |
494 | ||
495 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
496 | ".dynsym", &dynsym_idx); | |
497 | if (scn_dynsym == NULL) | |
498 | goto out_elf_end; | |
8ce998d6 | 499 | |
a25e46c4 | 500 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
501 | ".rela.plt", NULL); |
502 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 503 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
504 | ".rel.plt", NULL); |
505 | if (scn_plt_rel == NULL) | |
a25e46c4 | 506 | goto out_elf_end; |
8ce998d6 ACM |
507 | } |
508 | ||
a25e46c4 ACM |
509 | err = -1; |
510 | ||
8ce998d6 | 511 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 512 | goto out_elf_end; |
8ce998d6 | 513 | |
a25e46c4 ACM |
514 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
515 | goto out_elf_end; | |
8ce998d6 ACM |
516 | |
517 | /* | |
83a0944f | 518 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
519 | * and the symbols in the .dynsym they refer to. |
520 | */ | |
521 | reldata = elf_getdata(scn_plt_rel, NULL); | |
522 | if (reldata == NULL) | |
a25e46c4 | 523 | goto out_elf_end; |
8ce998d6 ACM |
524 | |
525 | syms = elf_getdata(scn_dynsym, NULL); | |
526 | if (syms == NULL) | |
a25e46c4 | 527 | goto out_elf_end; |
8ce998d6 | 528 | |
a25e46c4 | 529 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 530 | if (scn_symstrs == NULL) |
a25e46c4 | 531 | goto out_elf_end; |
8ce998d6 ACM |
532 | |
533 | symstrs = elf_getdata(scn_symstrs, NULL); | |
534 | if (symstrs == NULL) | |
a25e46c4 | 535 | goto out_elf_end; |
8ce998d6 ACM |
536 | |
537 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
538 | plt_offset = shdr_plt.sh_offset; | |
539 | ||
540 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
541 | GElf_Rela pos_mem, *pos; | |
542 | ||
543 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
544 | nr_rel_entries) { | |
545 | symidx = GELF_R_SYM(pos->r_info); | |
546 | plt_offset += shdr_plt.sh_entsize; | |
547 | gelf_getsym(syms, symidx, &sym); | |
548 | snprintf(sympltname, sizeof(sympltname), | |
549 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
550 | ||
551 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
439d473b | 552 | sympltname, self->sym_priv_size, v); |
8ce998d6 | 553 | if (!f) |
a25e46c4 | 554 | goto out_elf_end; |
8ce998d6 ACM |
555 | |
556 | dso__insert_symbol(self, f); | |
557 | ++nr; | |
558 | } | |
559 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
560 | GElf_Rel pos_mem, *pos; | |
561 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
562 | nr_rel_entries) { | |
563 | symidx = GELF_R_SYM(pos->r_info); | |
564 | plt_offset += shdr_plt.sh_entsize; | |
565 | gelf_getsym(syms, symidx, &sym); | |
566 | snprintf(sympltname, sizeof(sympltname), | |
567 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
568 | ||
569 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
439d473b | 570 | sympltname, self->sym_priv_size, v); |
8ce998d6 | 571 | if (!f) |
a25e46c4 | 572 | goto out_elf_end; |
8ce998d6 ACM |
573 | |
574 | dso__insert_symbol(self, f); | |
575 | ++nr; | |
576 | } | |
8ce998d6 ACM |
577 | } |
578 | ||
a25e46c4 ACM |
579 | err = 0; |
580 | out_elf_end: | |
581 | elf_end(elf); | |
582 | out_close: | |
583 | close(fd); | |
584 | ||
585 | if (err == 0) | |
586 | return nr; | |
587 | out: | |
588 | fprintf(stderr, "%s: problems reading %s PLT info.\n", | |
439d473b | 589 | __func__, self->long_name); |
a25e46c4 | 590 | return 0; |
8ce998d6 ACM |
591 | } |
592 | ||
439d473b ACM |
593 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
594 | int fd, symbol_filter_t filter, int kernel, | |
595 | int kmodule, int v) | |
a2928c42 | 596 | { |
6cfcc53e | 597 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
598 | uint32_t nr_syms; |
599 | int err = -1; | |
83a0944f | 600 | uint32_t idx; |
a2928c42 ACM |
601 | GElf_Ehdr ehdr; |
602 | GElf_Shdr shdr; | |
603 | Elf_Data *syms; | |
604 | GElf_Sym sym; | |
a25e46c4 | 605 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 606 | Elf *elf; |
439d473b | 607 | int nr = 0; |
a2928c42 ACM |
608 | |
609 | elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); | |
610 | if (elf == NULL) { | |
83a0944f | 611 | if (v) |
bd74137e IM |
612 | fprintf(stderr, "%s: cannot read %s ELF file.\n", |
613 | __func__, name); | |
a2928c42 ACM |
614 | goto out_close; |
615 | } | |
616 | ||
617 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
83a0944f | 618 | if (v) |
bd74137e | 619 | fprintf(stderr, "%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
620 | goto out_elf_end; |
621 | } | |
622 | ||
623 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 624 | if (sec == NULL) { |
a25e46c4 ACM |
625 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
626 | if (sec == NULL) | |
8ce998d6 | 627 | goto out_elf_end; |
8ce998d6 | 628 | } |
a2928c42 ACM |
629 | |
630 | syms = elf_getdata(sec, NULL); | |
631 | if (syms == NULL) | |
632 | goto out_elf_end; | |
633 | ||
634 | sec = elf_getscn(elf, shdr.sh_link); | |
635 | if (sec == NULL) | |
636 | goto out_elf_end; | |
637 | ||
638 | symstrs = elf_getdata(sec, NULL); | |
639 | if (symstrs == NULL) | |
640 | goto out_elf_end; | |
641 | ||
6cfcc53e MG |
642 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
643 | if (sec_strndx == NULL) | |
644 | goto out_elf_end; | |
645 | ||
646 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 647 | if (secstrs == NULL) |
6cfcc53e MG |
648 | goto out_elf_end; |
649 | ||
a2928c42 ACM |
650 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
651 | ||
e9fbc9dc | 652 | memset(&sym, 0, sizeof(sym)); |
d20ff6bd MG |
653 | if (!kernel) { |
654 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
655 | elf_section_by_name(elf, &ehdr, &shdr, |
656 | ".gnu.prelink_undo", | |
657 | NULL) != NULL); | |
d20ff6bd MG |
658 | } else self->adjust_symbols = 0; |
659 | ||
83a0944f | 660 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 661 | struct symbol *f; |
83a0944f | 662 | const char *elf_name; |
28ac909b | 663 | char *demangled; |
6cfcc53e MG |
664 | int is_label = elf_sym__is_label(&sym); |
665 | const char *section_name; | |
af427bf5 | 666 | u64 sh_offset = 0; |
a2928c42 | 667 | |
6cfcc53e | 668 | if (!is_label && !elf_sym__is_function(&sym)) |
a2928c42 ACM |
669 | continue; |
670 | ||
671 | sec = elf_getscn(elf, sym.st_shndx); | |
672 | if (!sec) | |
673 | goto out_elf_end; | |
674 | ||
675 | gelf_getshdr(sec, &shdr); | |
6cfcc53e MG |
676 | |
677 | if (is_label && !elf_sec__is_text(&shdr, secstrs)) | |
678 | continue; | |
679 | ||
680 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 681 | |
af427bf5 ACM |
682 | if ((kernel || kmodule)) { |
683 | if (strstr(section_name, ".init")) | |
684 | sh_offset = shdr.sh_offset; | |
685 | } | |
686 | ||
30d7a77d | 687 | if (self->adjust_symbols) { |
da21d1b5 | 688 | if (v > 2) |
f5812a7a ACM |
689 | printf("adjusting symbol: st_value: %Lx sh_addr: %Lx sh_offset: %Lx\n", |
690 | (u64)sym.st_value, (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
520f2c34 | 691 | |
f5812a7a | 692 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 693 | } |
28ac909b ACM |
694 | /* |
695 | * We need to figure out if the object was created from C++ sources | |
696 | * DWARF DW_compile_unit has this, but we don't always have access | |
697 | * to it... | |
698 | */ | |
83a0944f IM |
699 | elf_name = elf_sym__name(&sym, symstrs); |
700 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); | |
28ac909b | 701 | if (demangled != NULL) |
83a0944f | 702 | elf_name = demangled; |
6cfcc53e | 703 | |
af427bf5 | 704 | f = symbol__new(sym.st_value + sh_offset, sym.st_size, elf_name, |
439d473b | 705 | self->sym_priv_size, v); |
28ac909b | 706 | free(demangled); |
a2928c42 ACM |
707 | if (!f) |
708 | goto out_elf_end; | |
709 | ||
439d473b | 710 | if (filter && filter(map, f)) |
69ee69f6 ACM |
711 | symbol__delete(f, self->sym_priv_size); |
712 | else { | |
713 | dso__insert_symbol(self, f); | |
714 | nr++; | |
715 | } | |
a2928c42 ACM |
716 | } |
717 | ||
718 | err = nr; | |
719 | out_elf_end: | |
720 | elf_end(elf); | |
721 | out_close: | |
722 | return err; | |
723 | } | |
724 | ||
4d1e00a8 ACM |
725 | #define BUILD_ID_SIZE 128 |
726 | ||
83a0944f | 727 | static char *dso__read_build_id(struct dso *self, int v) |
4d1e00a8 ACM |
728 | { |
729 | int i; | |
730 | GElf_Ehdr ehdr; | |
731 | GElf_Shdr shdr; | |
732 | Elf_Data *build_id_data; | |
733 | Elf_Scn *sec; | |
734 | char *build_id = NULL, *bid; | |
735 | unsigned char *raw; | |
736 | Elf *elf; | |
439d473b | 737 | int fd = open(self->long_name, O_RDONLY); |
4d1e00a8 ACM |
738 | |
739 | if (fd < 0) | |
740 | goto out; | |
741 | ||
742 | elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); | |
743 | if (elf == NULL) { | |
83a0944f | 744 | if (v) |
4d1e00a8 | 745 | fprintf(stderr, "%s: cannot read %s ELF file.\n", |
439d473b | 746 | __func__, self->long_name); |
4d1e00a8 ACM |
747 | goto out_close; |
748 | } | |
749 | ||
750 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
83a0944f | 751 | if (v) |
4d1e00a8 ACM |
752 | fprintf(stderr, "%s: cannot get elf header.\n", __func__); |
753 | goto out_elf_end; | |
754 | } | |
755 | ||
756 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".note.gnu.build-id", NULL); | |
757 | if (sec == NULL) | |
758 | goto out_elf_end; | |
759 | ||
760 | build_id_data = elf_getdata(sec, NULL); | |
761 | if (build_id_data == NULL) | |
762 | goto out_elf_end; | |
763 | build_id = malloc(BUILD_ID_SIZE); | |
764 | if (build_id == NULL) | |
765 | goto out_elf_end; | |
766 | raw = build_id_data->d_buf + 16; | |
767 | bid = build_id; | |
768 | ||
769 | for (i = 0; i < 20; ++i) { | |
770 | sprintf(bid, "%02x", *raw); | |
771 | ++raw; | |
772 | bid += 2; | |
773 | } | |
83a0944f | 774 | if (v >= 2) |
439d473b | 775 | printf("%s(%s): %s\n", __func__, self->long_name, build_id); |
4d1e00a8 ACM |
776 | out_elf_end: |
777 | elf_end(elf); | |
778 | out_close: | |
779 | close(fd); | |
780 | out: | |
781 | return build_id; | |
782 | } | |
783 | ||
94cb9e38 ACM |
784 | char dso__symtab_origin(const struct dso *self) |
785 | { | |
786 | static const char origin[] = { | |
787 | [DSO__ORIG_KERNEL] = 'k', | |
788 | [DSO__ORIG_JAVA_JIT] = 'j', | |
789 | [DSO__ORIG_FEDORA] = 'f', | |
790 | [DSO__ORIG_UBUNTU] = 'u', | |
791 | [DSO__ORIG_BUILDID] = 'b', | |
792 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 793 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
794 | }; |
795 | ||
796 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
797 | return '!'; | |
798 | return origin[self->origin]; | |
799 | } | |
800 | ||
439d473b | 801 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter, int v) |
a2928c42 | 802 | { |
4d1e00a8 ACM |
803 | int size = PATH_MAX; |
804 | char *name = malloc(size), *build_id = NULL; | |
a2928c42 ACM |
805 | int ret = -1; |
806 | int fd; | |
807 | ||
808 | if (!name) | |
809 | return -1; | |
810 | ||
30d7a77d | 811 | self->adjust_symbols = 0; |
f5812a7a | 812 | |
94cb9e38 | 813 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
439d473b | 814 | ret = dso__load_perf_map(self, map, filter, v); |
94cb9e38 ACM |
815 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
816 | DSO__ORIG_NOT_FOUND; | |
817 | return ret; | |
818 | } | |
819 | ||
820 | self->origin = DSO__ORIG_FEDORA - 1; | |
80d496be | 821 | |
a2928c42 ACM |
822 | more: |
823 | do { | |
94cb9e38 ACM |
824 | self->origin++; |
825 | switch (self->origin) { | |
826 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
827 | snprintf(name, size, "/usr/lib/debug%s.debug", |
828 | self->long_name); | |
a2928c42 | 829 | break; |
94cb9e38 | 830 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
831 | snprintf(name, size, "/usr/lib/debug%s", |
832 | self->long_name); | |
a2928c42 | 833 | break; |
94cb9e38 | 834 | case DSO__ORIG_BUILDID: |
83a0944f | 835 | build_id = dso__read_build_id(self, v); |
4d1e00a8 ACM |
836 | if (build_id != NULL) { |
837 | snprintf(name, size, | |
838 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
839 | build_id, build_id + 2); | |
840 | free(build_id); | |
841 | break; | |
842 | } | |
94cb9e38 | 843 | self->origin++; |
4d1e00a8 | 844 | /* Fall thru */ |
94cb9e38 | 845 | case DSO__ORIG_DSO: |
439d473b | 846 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
847 | break; |
848 | ||
849 | default: | |
850 | goto out; | |
851 | } | |
a2928c42 ACM |
852 | |
853 | fd = open(name, O_RDONLY); | |
854 | } while (fd < 0); | |
855 | ||
439d473b | 856 | ret = dso__load_sym(self, map, name, fd, filter, 0, 0, v); |
a2928c42 ACM |
857 | close(fd); |
858 | ||
859 | /* | |
860 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
861 | */ | |
862 | if (!ret) | |
863 | goto more; | |
864 | ||
a25e46c4 | 865 | if (ret > 0) { |
83a0944f | 866 | int nr_plt = dso__synthesize_plt_symbols(self, v); |
a25e46c4 ACM |
867 | if (nr_plt > 0) |
868 | ret += nr_plt; | |
869 | } | |
a2928c42 ACM |
870 | out: |
871 | free(name); | |
1340e6bb ACM |
872 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
873 | return 0; | |
a2928c42 ACM |
874 | return ret; |
875 | } | |
876 | ||
439d473b ACM |
877 | struct map *kernel_map; |
878 | ||
879 | static void kernel_maps__insert(struct map *map) | |
6cfcc53e | 880 | { |
439d473b ACM |
881 | maps__insert(&kernel_maps, map); |
882 | } | |
6cfcc53e | 883 | |
439d473b ACM |
884 | struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp) |
885 | { | |
886 | /* | |
887 | * We can't have kernel_map in kernel_maps because it spans an address | |
888 | * space that includes the modules. The right way to fix this is to | |
889 | * create several maps, so that we don't have overlapping ranges with | |
890 | * modules. For now lets look first on the kernel dso. | |
891 | */ | |
892 | struct map *map = maps__find(&kernel_maps, ip); | |
893 | struct symbol *sym; | |
894 | ||
895 | if (map) { | |
896 | ip = map->map_ip(map, ip); | |
897 | sym = map->dso->find_symbol(map->dso, ip); | |
898 | } else { | |
899 | map = kernel_map; | |
900 | sym = map->dso->find_symbol(map->dso, ip); | |
901 | } | |
6cfcc53e | 902 | |
439d473b ACM |
903 | if (mapp) |
904 | *mapp = map; | |
6cfcc53e | 905 | |
439d473b ACM |
906 | return sym; |
907 | } | |
908 | ||
909 | struct map *kernel_maps__find_by_dso_name(const char *name) | |
910 | { | |
911 | struct rb_node *nd; | |
912 | ||
913 | for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) { | |
914 | struct map *map = rb_entry(nd, struct map, rb_node); | |
915 | ||
916 | if (map->dso && strcmp(map->dso->name, name) == 0) | |
917 | return map; | |
918 | } | |
919 | ||
920 | return NULL; | |
921 | } | |
922 | ||
923 | static int dso__load_module_sym(struct dso *self, struct map *map, | |
924 | symbol_filter_t filter, int v) | |
925 | { | |
926 | int err = 0, fd = open(self->long_name, O_RDONLY); | |
927 | ||
928 | if (fd < 0) { | |
929 | if (v) | |
930 | fprintf(stderr, "%s: cannot open %s\n", | |
931 | __func__, self->long_name); | |
6cfcc53e | 932 | return err; |
439d473b | 933 | } |
6cfcc53e | 934 | |
439d473b | 935 | err = dso__load_sym(self, map, self->long_name, fd, filter, 0, 1, v); |
6cfcc53e MG |
936 | close(fd); |
937 | ||
938 | return err; | |
939 | } | |
940 | ||
439d473b ACM |
941 | static int dsos__load_modules_sym_dir(char *dirname, |
942 | symbol_filter_t filter, int v) | |
6cfcc53e | 943 | { |
439d473b ACM |
944 | struct dirent *dent; |
945 | int nr_symbols = 0, err; | |
946 | DIR *dir = opendir(dirname); | |
6cfcc53e | 947 | |
439d473b ACM |
948 | if (!dir) { |
949 | if (v) | |
950 | fprintf(stderr, "%s: cannot open %s dir\n", __func__, | |
951 | dirname); | |
952 | return -1; | |
953 | } | |
6cfcc53e | 954 | |
439d473b ACM |
955 | while ((dent = readdir(dir)) != NULL) { |
956 | char path[PATH_MAX]; | |
957 | ||
958 | if (dent->d_type == DT_DIR) { | |
959 | if (!strcmp(dent->d_name, ".") || | |
960 | !strcmp(dent->d_name, "..")) | |
961 | continue; | |
962 | ||
963 | snprintf(path, sizeof(path), "%s/%s", | |
964 | dirname, dent->d_name); | |
965 | err = dsos__load_modules_sym_dir(path, filter, v); | |
966 | if (err < 0) | |
967 | goto failure; | |
968 | } else { | |
969 | char *dot = strrchr(dent->d_name, '.'), | |
970 | dso_name[PATH_MAX]; | |
971 | struct map *map; | |
972 | struct rb_node *last; | |
973 | ||
974 | if (dot == NULL || strcmp(dot, ".ko")) | |
975 | continue; | |
976 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
977 | (int)(dot - dent->d_name), dent->d_name); | |
978 | ||
a2a99e8e | 979 | strxfrchar(dso_name, '-', '_'); |
439d473b ACM |
980 | map = kernel_maps__find_by_dso_name(dso_name); |
981 | if (map == NULL) | |
982 | continue; | |
983 | ||
984 | snprintf(path, sizeof(path), "%s/%s", | |
985 | dirname, dent->d_name); | |
986 | ||
987 | map->dso->long_name = strdup(path); | |
988 | if (map->dso->long_name == NULL) | |
989 | goto failure; | |
990 | ||
991 | err = dso__load_module_sym(map->dso, map, filter, v); | |
992 | if (err < 0) | |
993 | goto failure; | |
994 | last = rb_last(&map->dso->syms); | |
995 | if (last) { | |
996 | struct symbol *sym; | |
997 | sym = rb_entry(last, struct symbol, rb_node); | |
998 | map->end = map->start + sym->end; | |
999 | } | |
1000 | } | |
1001 | nr_symbols += err; | |
1002 | } | |
6cfcc53e | 1003 | |
439d473b ACM |
1004 | return nr_symbols; |
1005 | failure: | |
1006 | closedir(dir); | |
1007 | return -1; | |
1008 | } | |
6cfcc53e | 1009 | |
439d473b ACM |
1010 | static int dsos__load_modules_sym(symbol_filter_t filter, int v) |
1011 | { | |
1012 | struct utsname uts; | |
1013 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1014 | |
439d473b ACM |
1015 | if (uname(&uts) < 0) |
1016 | return -1; | |
6cfcc53e | 1017 | |
439d473b ACM |
1018 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1019 | uts.release); | |
6cfcc53e | 1020 | |
439d473b | 1021 | return dsos__load_modules_sym_dir(modules_path, filter, v); |
6cfcc53e MG |
1022 | } |
1023 | ||
439d473b ACM |
1024 | /* |
1025 | * Constructor variant for modules (where we know from /proc/modules where | |
1026 | * they are loaded) and for vmlinux, where only after we load all the | |
1027 | * symbols we'll know where it starts and ends. | |
1028 | */ | |
1029 | static struct map *map__new2(u64 start, struct dso *dso) | |
6cfcc53e | 1030 | { |
439d473b | 1031 | struct map *self = malloc(sizeof(*self)); |
6cfcc53e | 1032 | |
439d473b ACM |
1033 | if (self != NULL) { |
1034 | self->start = start; | |
1035 | /* | |
1036 | * Will be filled after we load all the symbols | |
1037 | */ | |
1038 | self->end = 0; | |
1039 | ||
1040 | self->pgoff = 0; | |
1041 | self->dso = dso; | |
1042 | self->map_ip = map__map_ip; | |
1043 | RB_CLEAR_NODE(&self->rb_node); | |
1044 | } | |
1045 | return self; | |
1046 | } | |
1047 | ||
af427bf5 | 1048 | static int dsos__load_modules(unsigned int sym_priv_size) |
439d473b ACM |
1049 | { |
1050 | char *line = NULL; | |
1051 | size_t n; | |
1052 | FILE *file = fopen("/proc/modules", "r"); | |
1053 | struct map *map; | |
6cfcc53e | 1054 | |
439d473b ACM |
1055 | if (file == NULL) |
1056 | return -1; | |
6cfcc53e | 1057 | |
439d473b ACM |
1058 | while (!feof(file)) { |
1059 | char name[PATH_MAX]; | |
1060 | u64 start; | |
1061 | struct dso *dso; | |
1062 | char *sep; | |
1063 | int line_len; | |
6cfcc53e | 1064 | |
439d473b ACM |
1065 | line_len = getline(&line, &n, file); |
1066 | if (line_len < 0) | |
1067 | break; | |
1068 | ||
1069 | if (!line) | |
1070 | goto out_failure; | |
1071 | ||
1072 | line[--line_len] = '\0'; /* \n */ | |
1073 | ||
1074 | sep = strrchr(line, 'x'); | |
1075 | if (sep == NULL) | |
1076 | continue; | |
1077 | ||
1078 | hex2u64(sep + 1, &start); | |
1079 | ||
1080 | sep = strchr(line, ' '); | |
1081 | if (sep == NULL) | |
1082 | continue; | |
1083 | ||
1084 | *sep = '\0'; | |
1085 | ||
1086 | snprintf(name, sizeof(name), "[%s]", line); | |
1087 | dso = dso__new(name, sym_priv_size); | |
1088 | ||
1089 | if (dso == NULL) | |
1090 | goto out_delete_line; | |
1091 | ||
1092 | map = map__new2(start, dso); | |
1093 | if (map == NULL) { | |
1094 | dso__delete(dso); | |
1095 | goto out_delete_line; | |
6cfcc53e | 1096 | } |
439d473b ACM |
1097 | |
1098 | dso->origin = DSO__ORIG_KMODULE; | |
1099 | kernel_maps__insert(map); | |
1100 | dsos__add(dso); | |
6cfcc53e | 1101 | } |
439d473b ACM |
1102 | |
1103 | free(line); | |
1104 | fclose(file); | |
1105 | ||
af427bf5 | 1106 | return 0; |
439d473b ACM |
1107 | |
1108 | out_delete_line: | |
1109 | free(line); | |
1110 | out_failure: | |
1111 | return -1; | |
6cfcc53e MG |
1112 | } |
1113 | ||
439d473b ACM |
1114 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
1115 | const char *vmlinux, | |
83a0944f | 1116 | symbol_filter_t filter, int v) |
a2928c42 ACM |
1117 | { |
1118 | int err, fd = open(vmlinux, O_RDONLY); | |
1119 | ||
1120 | if (fd < 0) | |
1121 | return -1; | |
1122 | ||
439d473b | 1123 | err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0, v); |
6cfcc53e | 1124 | |
a2928c42 ACM |
1125 | close(fd); |
1126 | ||
1127 | return err; | |
1128 | } | |
1129 | ||
439d473b ACM |
1130 | int dsos__load_kernel(const char *vmlinux, unsigned int sym_priv_size, |
1131 | symbol_filter_t filter, int v, int use_modules) | |
a827c875 ACM |
1132 | { |
1133 | int err = -1; | |
439d473b ACM |
1134 | struct dso *dso = dso__new(vmlinux, sym_priv_size); |
1135 | ||
1136 | if (dso == NULL) | |
1137 | return -1; | |
1138 | ||
1139 | dso->short_name = "[kernel]"; | |
1140 | kernel_map = map__new2(0, dso); | |
1141 | if (kernel_map == NULL) | |
1142 | goto out_delete_dso; | |
1143 | ||
1144 | kernel_map->map_ip = vdso__map_ip; | |
a827c875 | 1145 | |
af427bf5 ACM |
1146 | if (use_modules && dsos__load_modules(sym_priv_size) < 0) { |
1147 | fprintf(stderr, "Failed to load list of modules in use! " | |
1148 | "Continuing...\n"); | |
1149 | use_modules = 0; | |
1150 | } | |
1151 | ||
6cfcc53e | 1152 | if (vmlinux) { |
439d473b | 1153 | err = dso__load_vmlinux(dso, kernel_map, vmlinux, filter, v); |
508c4d08 | 1154 | if (err > 0 && use_modules) { |
af427bf5 | 1155 | int syms = dsos__load_modules_sym(filter, v); |
508c4d08 | 1156 | |
af427bf5 ACM |
1157 | if (syms < 0) |
1158 | fprintf(stderr, "Failed to read module symbols!" | |
1159 | " Continuing...\n"); | |
1160 | else | |
1161 | err += syms; | |
508c4d08 | 1162 | } |
6cfcc53e | 1163 | } |
a827c875 | 1164 | |
9974f496 | 1165 | if (err <= 0) |
af427bf5 | 1166 | err = maps__load_kallsyms(filter, use_modules, v); |
439d473b ACM |
1167 | |
1168 | if (err > 0) { | |
1169 | struct rb_node *node = rb_first(&dso->syms); | |
1170 | struct symbol *sym = rb_entry(node, struct symbol, rb_node); | |
af427bf5 ACM |
1171 | /* |
1172 | * Now that we have all sorted out, just set the ->end of all | |
1173 | * symbols that still don't have it. | |
1174 | */ | |
1175 | dso__set_symbols_end(dso); | |
1176 | kernel_maps__fixup_sym_end(); | |
a827c875 | 1177 | |
439d473b ACM |
1178 | kernel_map->start = sym->start; |
1179 | node = rb_last(&dso->syms); | |
1180 | sym = rb_entry(node, struct symbol, rb_node); | |
1181 | kernel_map->end = sym->end; | |
1182 | ||
1183 | dso->origin = DSO__ORIG_KERNEL; | |
1184 | /* | |
1185 | * XXX See kernel_maps__find_symbol comment | |
1186 | * kernel_maps__insert(kernel_map) | |
1187 | */ | |
1188 | dsos__add(dso); | |
af427bf5 ACM |
1189 | |
1190 | if (v > 0) | |
1191 | kernel_maps__fprintf(stderr); | |
439d473b | 1192 | } |
94cb9e38 | 1193 | |
a827c875 | 1194 | return err; |
439d473b ACM |
1195 | |
1196 | out_delete_dso: | |
1197 | dso__delete(dso); | |
1198 | return -1; | |
a827c875 ACM |
1199 | } |
1200 | ||
cd84c2ac | 1201 | LIST_HEAD(dsos); |
cd84c2ac | 1202 | struct dso *vdso; |
cd84c2ac | 1203 | |
83a0944f | 1204 | const char *vmlinux_name = "vmlinux"; |
cd84c2ac FW |
1205 | int modules; |
1206 | ||
1207 | static void dsos__add(struct dso *dso) | |
1208 | { | |
1209 | list_add_tail(&dso->node, &dsos); | |
1210 | } | |
1211 | ||
1212 | static struct dso *dsos__find(const char *name) | |
1213 | { | |
1214 | struct dso *pos; | |
1215 | ||
1216 | list_for_each_entry(pos, &dsos, node) | |
1217 | if (strcmp(pos->name, name) == 0) | |
1218 | return pos; | |
1219 | return NULL; | |
1220 | } | |
1221 | ||
1222 | struct dso *dsos__findnew(const char *name) | |
1223 | { | |
1224 | struct dso *dso = dsos__find(name); | |
1225 | int nr; | |
1226 | ||
1227 | if (dso) | |
1228 | return dso; | |
1229 | ||
1230 | dso = dso__new(name, 0); | |
1231 | if (!dso) | |
1232 | goto out_delete_dso; | |
1233 | ||
439d473b | 1234 | nr = dso__load(dso, NULL, NULL, verbose); |
cd84c2ac FW |
1235 | if (nr < 0) { |
1236 | eprintf("Failed to open: %s\n", name); | |
1237 | goto out_delete_dso; | |
1238 | } | |
1239 | if (!nr) | |
1240 | eprintf("No symbols found in: %s, maybe install a debug package?\n", name); | |
1241 | ||
1242 | dsos__add(dso); | |
1243 | ||
1244 | return dso; | |
1245 | ||
1246 | out_delete_dso: | |
1247 | dso__delete(dso); | |
1248 | return NULL; | |
1249 | } | |
1250 | ||
1251 | void dsos__fprintf(FILE *fp) | |
1252 | { | |
1253 | struct dso *pos; | |
1254 | ||
1255 | list_for_each_entry(pos, &dsos, node) | |
1256 | dso__fprintf(pos, fp); | |
1257 | } | |
1258 | ||
cd84c2ac FW |
1259 | int load_kernel(void) |
1260 | { | |
439d473b | 1261 | if (dsos__load_kernel(vmlinux_name, 0, NULL, verbose, modules) <= 0) |
cd84c2ac FW |
1262 | return -1; |
1263 | ||
cd84c2ac FW |
1264 | vdso = dso__new("[vdso]", 0); |
1265 | if (!vdso) | |
1266 | return -1; | |
1267 | ||
cd84c2ac FW |
1268 | dsos__add(vdso); |
1269 | ||
439d473b | 1270 | return 0; |
cd84c2ac FW |
1271 | } |
1272 | ||
a2928c42 ACM |
1273 | void symbol__init(void) |
1274 | { | |
1275 | elf_version(EV_CURRENT); | |
1276 | } |