1
2
3
4
5
6
7
8
9
10#include <sys/types.h>
11#include <sys/stat.h>
12#include <fcntl.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <unistd.h>
17#include <errno.h>
18#include "builtin.h"
19
20#include "elf.h"
21#include "warn.h"
22
23#define MAX_NAME_LEN 128
24
25static inline u32 str_hash(const char *str)
26{
27 return jhash(str, strlen(str), 0);
28}
29
30static inline int elf_hash_bits(void)
31{
32 return vmlinux ? ELF_HASH_BITS : 16;
33}
34
35#define elf_hash_add(hashtable, node, key) \
36 hlist_add_head(node, &hashtable[hash_min(key, elf_hash_bits())])
37
38static void elf_hash_init(struct hlist_head *table)
39{
40 __hash_init(table, 1U << elf_hash_bits());
41}
42
43#define elf_hash_for_each_possible(name, obj, member, key) \
44 hlist_for_each_entry(obj, &name[hash_min(key, elf_hash_bits())], member)
45
46static void rb_add(struct rb_root *tree, struct rb_node *node,
47 int (*cmp)(struct rb_node *, const struct rb_node *))
48{
49 struct rb_node **link = &tree->rb_node;
50 struct rb_node *parent = NULL;
51
52 while (*link) {
53 parent = *link;
54 if (cmp(node, parent) < 0)
55 link = &parent->rb_left;
56 else
57 link = &parent->rb_right;
58 }
59
60 rb_link_node(node, parent, link);
61 rb_insert_color(node, tree);
62}
63
64static struct rb_node *rb_find_first(const struct rb_root *tree, const void *key,
65 int (*cmp)(const void *key, const struct rb_node *))
66{
67 struct rb_node *node = tree->rb_node;
68 struct rb_node *match = NULL;
69
70 while (node) {
71 int c = cmp(key, node);
72 if (c <= 0) {
73 if (!c)
74 match = node;
75 node = node->rb_left;
76 } else if (c > 0) {
77 node = node->rb_right;
78 }
79 }
80
81 return match;
82}
83
84static struct rb_node *rb_next_match(struct rb_node *node, const void *key,
85 int (*cmp)(const void *key, const struct rb_node *))
86{
87 node = rb_next(node);
88 if (node && cmp(key, node))
89 node = NULL;
90 return node;
91}
92
93#define rb_for_each(tree, node, key, cmp) \
94 for ((node) = rb_find_first((tree), (key), (cmp)); \
95 (node); (node) = rb_next_match((node), (key), (cmp)))
96
97static int symbol_to_offset(struct rb_node *a, const struct rb_node *b)
98{
99 struct symbol *sa = rb_entry(a, struct symbol, node);
100 struct symbol *sb = rb_entry(b, struct symbol, node);
101
102 if (sa->offset < sb->offset)
103 return -1;
104 if (sa->offset > sb->offset)
105 return 1;
106
107 if (sa->len < sb->len)
108 return -1;
109 if (sa->len > sb->len)
110 return 1;
111
112 sa->alias = sb;
113
114 return 0;
115}
116
117static int symbol_by_offset(const void *key, const struct rb_node *node)
118{
119 const struct symbol *s = rb_entry(node, struct symbol, node);
120 const unsigned long *o = key;
121
122 if (*o < s->offset)
123 return -1;
124 if (*o >= s->offset + s->len)
125 return 1;
126
127 return 0;
128}
129
130struct section *find_section_by_name(const struct elf *elf, const char *name)
131{
132 struct section *sec;
133
134 elf_hash_for_each_possible(elf->section_name_hash, sec, name_hash, str_hash(name))
135 if (!strcmp(sec->name, name))
136 return sec;
137
138 return NULL;
139}
140
141static struct section *find_section_by_index(struct elf *elf,
142 unsigned int idx)
143{
144 struct section *sec;
145
146 elf_hash_for_each_possible(elf->section_hash, sec, hash, idx)
147 if (sec->idx == idx)
148 return sec;
149
150 return NULL;
151}
152
153static struct symbol *find_symbol_by_index(struct elf *elf, unsigned int idx)
154{
155 struct symbol *sym;
156
157 elf_hash_for_each_possible(elf->symbol_hash, sym, hash, idx)
158 if (sym->idx == idx)
159 return sym;
160
161 return NULL;
162}
163
164struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset)
165{
166 struct rb_node *node;
167
168 rb_for_each(&sec->symbol_tree, node, &offset, symbol_by_offset) {
169 struct symbol *s = rb_entry(node, struct symbol, node);
170
171 if (s->offset == offset && s->type != STT_SECTION)
172 return s;
173 }
174
175 return NULL;
176}
177
178struct symbol *find_func_by_offset(struct section *sec, unsigned long offset)
179{
180 struct rb_node *node;
181
182 rb_for_each(&sec->symbol_tree, node, &offset, symbol_by_offset) {
183 struct symbol *s = rb_entry(node, struct symbol, node);
184
185 if (s->offset == offset && s->type == STT_FUNC)
186 return s;
187 }
188
189 return NULL;
190}
191
192struct symbol *find_symbol_containing(const struct section *sec, unsigned long offset)
193{
194 struct rb_node *node;
195
196 rb_for_each(&sec->symbol_tree, node, &offset, symbol_by_offset) {
197 struct symbol *s = rb_entry(node, struct symbol, node);
198
199 if (s->type != STT_SECTION)
200 return s;
201 }
202
203 return NULL;
204}
205
206struct symbol *find_func_containing(struct section *sec, unsigned long offset)
207{
208 struct rb_node *node;
209
210 rb_for_each(&sec->symbol_tree, node, &offset, symbol_by_offset) {
211 struct symbol *s = rb_entry(node, struct symbol, node);
212
213 if (s->type == STT_FUNC)
214 return s;
215 }
216
217 return NULL;
218}
219
220struct symbol *find_symbol_by_name(const struct elf *elf, const char *name)
221{
222 struct symbol *sym;
223
224 elf_hash_for_each_possible(elf->symbol_name_hash, sym, name_hash, str_hash(name))
225 if (!strcmp(sym->name, name))
226 return sym;
227
228 return NULL;
229}
230
231struct rela *find_rela_by_dest_range(const struct elf *elf, struct section *sec,
232 unsigned long offset, unsigned int len)
233{
234 struct rela *rela, *r = NULL;
235 unsigned long o;
236
237 if (!sec->rela)
238 return NULL;
239
240 sec = sec->rela;
241
242 for_offset_range(o, offset, offset + len) {
243 elf_hash_for_each_possible(elf->rela_hash, rela, hash,
244 sec_offset_hash(sec, o)) {
245 if (rela->sec != sec)
246 continue;
247
248 if (rela->offset >= offset && rela->offset < offset + len) {
249 if (!r || rela->offset < r->offset)
250 r = rela;
251 }
252 }
253 if (r)
254 return r;
255 }
256
257 return NULL;
258}
259
260struct rela *find_rela_by_dest(const struct elf *elf, struct section *sec, unsigned long offset)
261{
262 return find_rela_by_dest_range(elf, sec, offset, 1);
263}
264
265static int read_sections(struct elf *elf)
266{
267 Elf_Scn *s = NULL;
268 struct section *sec;
269 size_t shstrndx, sections_nr;
270 int i;
271
272 if (elf_getshdrnum(elf->elf, §ions_nr)) {
273 WARN_ELF("elf_getshdrnum");
274 return -1;
275 }
276
277 if (elf_getshdrstrndx(elf->elf, &shstrndx)) {
278 WARN_ELF("elf_getshdrstrndx");
279 return -1;
280 }
281
282 for (i = 0; i < sections_nr; i++) {
283 sec = malloc(sizeof(*sec));
284 if (!sec) {
285 perror("malloc");
286 return -1;
287 }
288 memset(sec, 0, sizeof(*sec));
289
290 INIT_LIST_HEAD(&sec->symbol_list);
291 INIT_LIST_HEAD(&sec->rela_list);
292
293 s = elf_getscn(elf->elf, i);
294 if (!s) {
295 WARN_ELF("elf_getscn");
296 return -1;
297 }
298
299 sec->idx = elf_ndxscn(s);
300
301 if (!gelf_getshdr(s, &sec->sh)) {
302 WARN_ELF("gelf_getshdr");
303 return -1;
304 }
305
306 sec->name = elf_strptr(elf->elf, shstrndx, sec->sh.sh_name);
307 if (!sec->name) {
308 WARN_ELF("elf_strptr");
309 return -1;
310 }
311
312 if (sec->sh.sh_size != 0) {
313 sec->data = elf_getdata(s, NULL);
314 if (!sec->data) {
315 WARN_ELF("elf_getdata");
316 return -1;
317 }
318 if (sec->data->d_off != 0 ||
319 sec->data->d_size != sec->sh.sh_size) {
320 WARN("unexpected data attributes for %s",
321 sec->name);
322 return -1;
323 }
324 }
325 sec->len = sec->sh.sh_size;
326
327 list_add_tail(&sec->list, &elf->sections);
328 elf_hash_add(elf->section_hash, &sec->hash, sec->idx);
329 elf_hash_add(elf->section_name_hash, &sec->name_hash, str_hash(sec->name));
330 }
331
332 if (stats)
333 printf("nr_sections: %lu\n", (unsigned long)sections_nr);
334
335
336 if (elf_nextscn(elf->elf, s)) {
337 WARN("section entry mismatch");
338 return -1;
339 }
340
341 return 0;
342}
343
344static int read_symbols(struct elf *elf)
345{
346 struct section *symtab, *symtab_shndx, *sec;
347 struct symbol *sym, *pfunc;
348 struct list_head *entry;
349 struct rb_node *pnode;
350 int symbols_nr, i;
351 char *coldstr;
352 Elf_Data *shndx_data = NULL;
353 Elf32_Word shndx;
354
355 symtab = find_section_by_name(elf, ".symtab");
356 if (!symtab) {
357 WARN("missing symbol table");
358 return -1;
359 }
360
361 symtab_shndx = find_section_by_name(elf, ".symtab_shndx");
362 if (symtab_shndx)
363 shndx_data = symtab_shndx->data;
364
365 symbols_nr = symtab->sh.sh_size / symtab->sh.sh_entsize;
366
367 for (i = 0; i < symbols_nr; i++) {
368 sym = malloc(sizeof(*sym));
369 if (!sym) {
370 perror("malloc");
371 return -1;
372 }
373 memset(sym, 0, sizeof(*sym));
374 sym->alias = sym;
375
376 sym->idx = i;
377
378 if (!gelf_getsymshndx(symtab->data, shndx_data, i, &sym->sym,
379 &shndx)) {
380 WARN_ELF("gelf_getsymshndx");
381 goto err;
382 }
383
384 sym->name = elf_strptr(elf->elf, symtab->sh.sh_link,
385 sym->sym.st_name);
386 if (!sym->name) {
387 WARN_ELF("elf_strptr");
388 goto err;
389 }
390
391 sym->type = GELF_ST_TYPE(sym->sym.st_info);
392 sym->bind = GELF_ST_BIND(sym->sym.st_info);
393
394 if ((sym->sym.st_shndx > SHN_UNDEF &&
395 sym->sym.st_shndx < SHN_LORESERVE) ||
396 (shndx_data && sym->sym.st_shndx == SHN_XINDEX)) {
397 if (sym->sym.st_shndx != SHN_XINDEX)
398 shndx = sym->sym.st_shndx;
399
400 sym->sec = find_section_by_index(elf, shndx);
401 if (!sym->sec) {
402 WARN("couldn't find section for symbol %s",
403 sym->name);
404 goto err;
405 }
406 if (sym->type == STT_SECTION) {
407 sym->name = sym->sec->name;
408 sym->sec->sym = sym;
409 }
410 } else
411 sym->sec = find_section_by_index(elf, 0);
412
413 sym->offset = sym->sym.st_value;
414 sym->len = sym->sym.st_size;
415
416 rb_add(&sym->sec->symbol_tree, &sym->node, symbol_to_offset);
417 pnode = rb_prev(&sym->node);
418 if (pnode)
419 entry = &rb_entry(pnode, struct symbol, node)->list;
420 else
421 entry = &sym->sec->symbol_list;
422 list_add(&sym->list, entry);
423 elf_hash_add(elf->symbol_hash, &sym->hash, sym->idx);
424 elf_hash_add(elf->symbol_name_hash, &sym->name_hash, str_hash(sym->name));
425 }
426
427 if (stats)
428 printf("nr_symbols: %lu\n", (unsigned long)symbols_nr);
429
430
431 list_for_each_entry(sec, &elf->sections, list) {
432 list_for_each_entry(sym, &sec->symbol_list, list) {
433 char pname[MAX_NAME_LEN + 1];
434 size_t pnamelen;
435 if (sym->type != STT_FUNC)
436 continue;
437 sym->pfunc = sym->cfunc = sym;
438 coldstr = strstr(sym->name, ".cold");
439 if (!coldstr)
440 continue;
441
442 pnamelen = coldstr - sym->name;
443 if (pnamelen > MAX_NAME_LEN) {
444 WARN("%s(): parent function name exceeds maximum length of %d characters",
445 sym->name, MAX_NAME_LEN);
446 return -1;
447 }
448
449 strncpy(pname, sym->name, pnamelen);
450 pname[pnamelen] = '\0';
451 pfunc = find_symbol_by_name(elf, pname);
452
453 if (!pfunc) {
454 WARN("%s(): can't find parent function",
455 sym->name);
456 return -1;
457 }
458
459 sym->pfunc = pfunc;
460 pfunc->cfunc = sym;
461
462
463
464
465
466
467
468
469
470 if (sym->sec == pfunc->sec &&
471 sym->offset >= pfunc->offset &&
472 sym->offset + sym->len == pfunc->offset + pfunc->len) {
473 pfunc->len -= sym->len;
474 }
475 }
476 }
477
478 return 0;
479
480err:
481 free(sym);
482 return -1;
483}
484
485void elf_add_rela(struct elf *elf, struct rela *rela)
486{
487 struct section *sec = rela->sec;
488
489 list_add_tail(&rela->list, &sec->rela_list);
490 elf_hash_add(elf->rela_hash, &rela->hash, rela_hash(rela));
491}
492
493static int read_relas(struct elf *elf)
494{
495 struct section *sec;
496 struct rela *rela;
497 int i;
498 unsigned int symndx;
499 unsigned long nr_rela, max_rela = 0, tot_rela = 0;
500
501 list_for_each_entry(sec, &elf->sections, list) {
502 if (sec->sh.sh_type != SHT_RELA)
503 continue;
504
505 sec->base = find_section_by_name(elf, sec->name + 5);
506 if (!sec->base) {
507 WARN("can't find base section for rela section %s",
508 sec->name);
509 return -1;
510 }
511
512 sec->base->rela = sec;
513
514 nr_rela = 0;
515 for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) {
516 rela = malloc(sizeof(*rela));
517 if (!rela) {
518 perror("malloc");
519 return -1;
520 }
521 memset(rela, 0, sizeof(*rela));
522
523 if (!gelf_getrela(sec->data, i, &rela->rela)) {
524 WARN_ELF("gelf_getrela");
525 return -1;
526 }
527
528 rela->type = GELF_R_TYPE(rela->rela.r_info);
529 rela->addend = rela->rela.r_addend;
530 rela->offset = rela->rela.r_offset;
531 symndx = GELF_R_SYM(rela->rela.r_info);
532 rela->sec = sec;
533 rela->idx = i;
534 rela->sym = find_symbol_by_index(elf, symndx);
535 if (!rela->sym) {
536 WARN("can't find rela entry symbol %d for %s",
537 symndx, sec->name);
538 return -1;
539 }
540
541 elf_add_rela(elf, rela);
542 nr_rela++;
543 }
544 max_rela = max(max_rela, nr_rela);
545 tot_rela += nr_rela;
546 }
547
548 if (stats) {
549 printf("max_rela: %lu\n", max_rela);
550 printf("tot_rela: %lu\n", tot_rela);
551 }
552
553 return 0;
554}
555
556struct elf *elf_open_read(const char *name, int flags)
557{
558 struct elf *elf;
559 Elf_Cmd cmd;
560
561 elf_version(EV_CURRENT);
562
563 elf = malloc(sizeof(*elf));
564 if (!elf) {
565 perror("malloc");
566 return NULL;
567 }
568 memset(elf, 0, offsetof(struct elf, sections));
569
570 INIT_LIST_HEAD(&elf->sections);
571
572 elf_hash_init(elf->symbol_hash);
573 elf_hash_init(elf->symbol_name_hash);
574 elf_hash_init(elf->section_hash);
575 elf_hash_init(elf->section_name_hash);
576 elf_hash_init(elf->rela_hash);
577
578 elf->fd = open(name, flags);
579 if (elf->fd == -1) {
580 fprintf(stderr, "objtool: Can't open '%s': %s\n",
581 name, strerror(errno));
582 goto err;
583 }
584
585 if ((flags & O_ACCMODE) == O_RDONLY)
586 cmd = ELF_C_READ_MMAP;
587 else if ((flags & O_ACCMODE) == O_RDWR)
588 cmd = ELF_C_RDWR;
589 else
590 cmd = ELF_C_WRITE;
591
592 elf->elf = elf_begin(elf->fd, cmd, NULL);
593 if (!elf->elf) {
594 WARN_ELF("elf_begin");
595 goto err;
596 }
597
598 if (!gelf_getehdr(elf->elf, &elf->ehdr)) {
599 WARN_ELF("gelf_getehdr");
600 goto err;
601 }
602
603 if (read_sections(elf))
604 goto err;
605
606 if (read_symbols(elf))
607 goto err;
608
609 if (read_relas(elf))
610 goto err;
611
612 return elf;
613
614err:
615 elf_close(elf);
616 return NULL;
617}
618
619struct section *elf_create_section(struct elf *elf, const char *name,
620 size_t entsize, int nr)
621{
622 struct section *sec, *shstrtab;
623 size_t size = entsize * nr;
624 Elf_Scn *s;
625 Elf_Data *data;
626
627 sec = malloc(sizeof(*sec));
628 if (!sec) {
629 perror("malloc");
630 return NULL;
631 }
632 memset(sec, 0, sizeof(*sec));
633
634 INIT_LIST_HEAD(&sec->symbol_list);
635 INIT_LIST_HEAD(&sec->rela_list);
636
637 s = elf_newscn(elf->elf);
638 if (!s) {
639 WARN_ELF("elf_newscn");
640 return NULL;
641 }
642
643 sec->name = strdup(name);
644 if (!sec->name) {
645 perror("strdup");
646 return NULL;
647 }
648
649 sec->idx = elf_ndxscn(s);
650 sec->len = size;
651 sec->changed = true;
652
653 sec->data = elf_newdata(s);
654 if (!sec->data) {
655 WARN_ELF("elf_newdata");
656 return NULL;
657 }
658
659 sec->data->d_size = size;
660 sec->data->d_align = 1;
661
662 if (size) {
663 sec->data->d_buf = malloc(size);
664 if (!sec->data->d_buf) {
665 perror("malloc");
666 return NULL;
667 }
668 memset(sec->data->d_buf, 0, size);
669 }
670
671 if (!gelf_getshdr(s, &sec->sh)) {
672 WARN_ELF("gelf_getshdr");
673 return NULL;
674 }
675
676 sec->sh.sh_size = size;
677 sec->sh.sh_entsize = entsize;
678 sec->sh.sh_type = SHT_PROGBITS;
679 sec->sh.sh_addralign = 1;
680 sec->sh.sh_flags = SHF_ALLOC;
681
682
683
684 shstrtab = find_section_by_name(elf, ".shstrtab");
685 if (!shstrtab)
686 shstrtab = find_section_by_name(elf, ".strtab");
687 if (!shstrtab) {
688 WARN("can't find .shstrtab or .strtab section");
689 return NULL;
690 }
691
692 s = elf_getscn(elf->elf, shstrtab->idx);
693 if (!s) {
694 WARN_ELF("elf_getscn");
695 return NULL;
696 }
697
698 data = elf_newdata(s);
699 if (!data) {
700 WARN_ELF("elf_newdata");
701 return NULL;
702 }
703
704 data->d_buf = sec->name;
705 data->d_size = strlen(name) + 1;
706 data->d_align = 1;
707
708 sec->sh.sh_name = shstrtab->len;
709
710 shstrtab->len += strlen(name) + 1;
711 shstrtab->changed = true;
712
713 list_add_tail(&sec->list, &elf->sections);
714 elf_hash_add(elf->section_hash, &sec->hash, sec->idx);
715 elf_hash_add(elf->section_name_hash, &sec->name_hash, str_hash(sec->name));
716
717 elf->changed = true;
718
719 return sec;
720}
721
722struct section *elf_create_rela_section(struct elf *elf, struct section *base)
723{
724 char *relaname;
725 struct section *sec;
726
727 relaname = malloc(strlen(base->name) + strlen(".rela") + 1);
728 if (!relaname) {
729 perror("malloc");
730 return NULL;
731 }
732 strcpy(relaname, ".rela");
733 strcat(relaname, base->name);
734
735 sec = elf_create_section(elf, relaname, sizeof(GElf_Rela), 0);
736 free(relaname);
737 if (!sec)
738 return NULL;
739
740 base->rela = sec;
741 sec->base = base;
742
743 sec->sh.sh_type = SHT_RELA;
744 sec->sh.sh_addralign = 8;
745 sec->sh.sh_link = find_section_by_name(elf, ".symtab")->idx;
746 sec->sh.sh_info = base->idx;
747 sec->sh.sh_flags = SHF_INFO_LINK;
748
749 return sec;
750}
751
752int elf_rebuild_rela_section(struct elf *elf, struct section *sec)
753{
754 struct rela *rela;
755 int nr, idx = 0, size;
756 GElf_Rela *relas;
757
758 nr = 0;
759 list_for_each_entry(rela, &sec->rela_list, list)
760 nr++;
761
762 size = nr * sizeof(*relas);
763 relas = malloc(size);
764 if (!relas) {
765 perror("malloc");
766 return -1;
767 }
768
769 sec->changed = true;
770 elf->changed = true;
771
772 sec->data->d_buf = relas;
773 sec->data->d_size = size;
774
775 sec->sh.sh_size = size;
776
777 idx = 0;
778 list_for_each_entry(rela, &sec->rela_list, list) {
779 relas[idx].r_offset = rela->offset;
780 relas[idx].r_addend = rela->addend;
781 relas[idx].r_info = GELF_R_INFO(rela->sym->idx, rela->type);
782 idx++;
783 }
784
785 return 0;
786}
787
788int elf_write_insn(struct elf *elf, struct section *sec,
789 unsigned long offset, unsigned int len,
790 const char *insn)
791{
792 Elf_Data *data = sec->data;
793
794 if (data->d_type != ELF_T_BYTE || data->d_off) {
795 WARN("write to unexpected data for section: %s", sec->name);
796 return -1;
797 }
798
799 memcpy(data->d_buf + offset, insn, len);
800 elf_flagdata(data, ELF_C_SET, ELF_F_DIRTY);
801
802 elf->changed = true;
803
804 return 0;
805}
806
807int elf_write_rela(struct elf *elf, struct rela *rela)
808{
809 struct section *sec = rela->sec;
810
811 rela->rela.r_info = GELF_R_INFO(rela->sym->idx, rela->type);
812 rela->rela.r_addend = rela->addend;
813 rela->rela.r_offset = rela->offset;
814
815 if (!gelf_update_rela(sec->data, rela->idx, &rela->rela)) {
816 WARN_ELF("gelf_update_rela");
817 return -1;
818 }
819
820 elf->changed = true;
821
822 return 0;
823}
824
825int elf_write(struct elf *elf)
826{
827 struct section *sec;
828 Elf_Scn *s;
829
830
831 list_for_each_entry(sec, &elf->sections, list) {
832 if (sec->changed) {
833 s = elf_getscn(elf->elf, sec->idx);
834 if (!s) {
835 WARN_ELF("elf_getscn");
836 return -1;
837 }
838 if (!gelf_update_shdr(s, &sec->sh)) {
839 WARN_ELF("gelf_update_shdr");
840 return -1;
841 }
842
843 sec->changed = false;
844 }
845 }
846
847
848 elf_flagelf(elf->elf, ELF_C_SET, ELF_F_DIRTY);
849
850
851 if (elf_update(elf->elf, ELF_C_WRITE) < 0) {
852 WARN_ELF("elf_update");
853 return -1;
854 }
855
856 elf->changed = false;
857
858 return 0;
859}
860
861void elf_close(struct elf *elf)
862{
863 struct section *sec, *tmpsec;
864 struct symbol *sym, *tmpsym;
865 struct rela *rela, *tmprela;
866
867 if (elf->elf)
868 elf_end(elf->elf);
869
870 if (elf->fd > 0)
871 close(elf->fd);
872
873 list_for_each_entry_safe(sec, tmpsec, &elf->sections, list) {
874 list_for_each_entry_safe(sym, tmpsym, &sec->symbol_list, list) {
875 list_del(&sym->list);
876 hash_del(&sym->hash);
877 free(sym);
878 }
879 list_for_each_entry_safe(rela, tmprela, &sec->rela_list, list) {
880 list_del(&rela->list);
881 hash_del(&rela->hash);
882 free(rela);
883 }
884 list_del(&sec->list);
885 free(sec);
886 }
887
888 free(elf);
889}
890
