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