1442f04c3SJosh Poimboeuf /* 2442f04c3SJosh Poimboeuf * elf.c - ELF access library 3442f04c3SJosh Poimboeuf * 4442f04c3SJosh Poimboeuf * Adapted from kpatch (https://github.com/dynup/kpatch): 5442f04c3SJosh Poimboeuf * Copyright (C) 2013-2015 Josh Poimboeuf <jpoimboe@redhat.com> 6442f04c3SJosh Poimboeuf * Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> 7442f04c3SJosh Poimboeuf * 8442f04c3SJosh Poimboeuf * This program is free software; you can redistribute it and/or 9442f04c3SJosh Poimboeuf * modify it under the terms of the GNU General Public License 10442f04c3SJosh Poimboeuf * as published by the Free Software Foundation; either version 2 11442f04c3SJosh Poimboeuf * of the License, or (at your option) any later version. 12442f04c3SJosh Poimboeuf * 13442f04c3SJosh Poimboeuf * This program is distributed in the hope that it will be useful, 14442f04c3SJosh Poimboeuf * but WITHOUT ANY WARRANTY; without even the implied warranty of 15442f04c3SJosh Poimboeuf * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16442f04c3SJosh Poimboeuf * GNU General Public License for more details. 17442f04c3SJosh Poimboeuf * 18442f04c3SJosh Poimboeuf * You should have received a copy of the GNU General Public License 19442f04c3SJosh Poimboeuf * along with this program; if not, see <http://www.gnu.org/licenses/>. 20442f04c3SJosh Poimboeuf */ 21442f04c3SJosh Poimboeuf 22442f04c3SJosh Poimboeuf #include <sys/types.h> 23442f04c3SJosh Poimboeuf #include <sys/stat.h> 24442f04c3SJosh Poimboeuf #include <fcntl.h> 25442f04c3SJosh Poimboeuf #include <stdio.h> 26442f04c3SJosh Poimboeuf #include <stdlib.h> 27442f04c3SJosh Poimboeuf #include <string.h> 28442f04c3SJosh Poimboeuf #include <unistd.h> 29442f04c3SJosh Poimboeuf 30442f04c3SJosh Poimboeuf #include "elf.h" 31442f04c3SJosh Poimboeuf #include "warn.h" 32442f04c3SJosh Poimboeuf 33442f04c3SJosh Poimboeuf struct section *find_section_by_name(struct elf *elf, const char *name) 34442f04c3SJosh Poimboeuf { 35442f04c3SJosh Poimboeuf struct section *sec; 36442f04c3SJosh Poimboeuf 37442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) 38442f04c3SJosh Poimboeuf if (!strcmp(sec->name, name)) 39442f04c3SJosh Poimboeuf return sec; 40442f04c3SJosh Poimboeuf 41442f04c3SJosh Poimboeuf return NULL; 42442f04c3SJosh Poimboeuf } 43442f04c3SJosh Poimboeuf 44442f04c3SJosh Poimboeuf static struct section *find_section_by_index(struct elf *elf, 45442f04c3SJosh Poimboeuf unsigned int idx) 46442f04c3SJosh Poimboeuf { 47442f04c3SJosh Poimboeuf struct section *sec; 48442f04c3SJosh Poimboeuf 49442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) 50442f04c3SJosh Poimboeuf if (sec->idx == idx) 51442f04c3SJosh Poimboeuf return sec; 52442f04c3SJosh Poimboeuf 53442f04c3SJosh Poimboeuf return NULL; 54442f04c3SJosh Poimboeuf } 55442f04c3SJosh Poimboeuf 56442f04c3SJosh Poimboeuf static struct symbol *find_symbol_by_index(struct elf *elf, unsigned int idx) 57442f04c3SJosh Poimboeuf { 58442f04c3SJosh Poimboeuf struct section *sec; 59442f04c3SJosh Poimboeuf struct symbol *sym; 60442f04c3SJosh Poimboeuf 61442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) 62042ba73fSJosh Poimboeuf hash_for_each_possible(sec->symbol_hash, sym, hash, idx) 63442f04c3SJosh Poimboeuf if (sym->idx == idx) 64442f04c3SJosh Poimboeuf return sym; 65442f04c3SJosh Poimboeuf 66442f04c3SJosh Poimboeuf return NULL; 67442f04c3SJosh Poimboeuf } 68442f04c3SJosh Poimboeuf 69442f04c3SJosh Poimboeuf struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset) 70442f04c3SJosh Poimboeuf { 71442f04c3SJosh Poimboeuf struct symbol *sym; 72442f04c3SJosh Poimboeuf 73a196e171SJosh Poimboeuf list_for_each_entry(sym, &sec->symbol_list, list) 74442f04c3SJosh Poimboeuf if (sym->type != STT_SECTION && 75442f04c3SJosh Poimboeuf sym->offset == offset) 76442f04c3SJosh Poimboeuf return sym; 77442f04c3SJosh Poimboeuf 78442f04c3SJosh Poimboeuf return NULL; 79442f04c3SJosh Poimboeuf } 80442f04c3SJosh Poimboeuf 81442f04c3SJosh Poimboeuf struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, 82442f04c3SJosh Poimboeuf unsigned int len) 83442f04c3SJosh Poimboeuf { 84442f04c3SJosh Poimboeuf struct rela *rela; 85042ba73fSJosh Poimboeuf unsigned long o; 86442f04c3SJosh Poimboeuf 87442f04c3SJosh Poimboeuf if (!sec->rela) 88442f04c3SJosh Poimboeuf return NULL; 89442f04c3SJosh Poimboeuf 90042ba73fSJosh Poimboeuf for (o = offset; o < offset + len; o++) 91042ba73fSJosh Poimboeuf hash_for_each_possible(sec->rela->rela_hash, rela, hash, o) 92042ba73fSJosh Poimboeuf if (rela->offset == o) 93442f04c3SJosh Poimboeuf return rela; 94442f04c3SJosh Poimboeuf 95442f04c3SJosh Poimboeuf return NULL; 96442f04c3SJosh Poimboeuf } 97442f04c3SJosh Poimboeuf 98442f04c3SJosh Poimboeuf struct rela *find_rela_by_dest(struct section *sec, unsigned long offset) 99442f04c3SJosh Poimboeuf { 100442f04c3SJosh Poimboeuf return find_rela_by_dest_range(sec, offset, 1); 101442f04c3SJosh Poimboeuf } 102442f04c3SJosh Poimboeuf 103442f04c3SJosh Poimboeuf struct symbol *find_containing_func(struct section *sec, unsigned long offset) 104442f04c3SJosh Poimboeuf { 105442f04c3SJosh Poimboeuf struct symbol *func; 106442f04c3SJosh Poimboeuf 107a196e171SJosh Poimboeuf list_for_each_entry(func, &sec->symbol_list, list) 108442f04c3SJosh Poimboeuf if (func->type == STT_FUNC && offset >= func->offset && 109442f04c3SJosh Poimboeuf offset < func->offset + func->len) 110442f04c3SJosh Poimboeuf return func; 111442f04c3SJosh Poimboeuf 112442f04c3SJosh Poimboeuf return NULL; 113442f04c3SJosh Poimboeuf } 114442f04c3SJosh Poimboeuf 115442f04c3SJosh Poimboeuf static int read_sections(struct elf *elf) 116442f04c3SJosh Poimboeuf { 117442f04c3SJosh Poimboeuf Elf_Scn *s = NULL; 118442f04c3SJosh Poimboeuf struct section *sec; 119442f04c3SJosh Poimboeuf size_t shstrndx, sections_nr; 120442f04c3SJosh Poimboeuf int i; 121442f04c3SJosh Poimboeuf 122442f04c3SJosh Poimboeuf if (elf_getshdrnum(elf->elf, §ions_nr)) { 123442f04c3SJosh Poimboeuf perror("elf_getshdrnum"); 124442f04c3SJosh Poimboeuf return -1; 125442f04c3SJosh Poimboeuf } 126442f04c3SJosh Poimboeuf 127442f04c3SJosh Poimboeuf if (elf_getshdrstrndx(elf->elf, &shstrndx)) { 128442f04c3SJosh Poimboeuf perror("elf_getshdrstrndx"); 129442f04c3SJosh Poimboeuf return -1; 130442f04c3SJosh Poimboeuf } 131442f04c3SJosh Poimboeuf 132442f04c3SJosh Poimboeuf for (i = 0; i < sections_nr; i++) { 133442f04c3SJosh Poimboeuf sec = malloc(sizeof(*sec)); 134442f04c3SJosh Poimboeuf if (!sec) { 135442f04c3SJosh Poimboeuf perror("malloc"); 136442f04c3SJosh Poimboeuf return -1; 137442f04c3SJosh Poimboeuf } 138442f04c3SJosh Poimboeuf memset(sec, 0, sizeof(*sec)); 139442f04c3SJosh Poimboeuf 140a196e171SJosh Poimboeuf INIT_LIST_HEAD(&sec->symbol_list); 141a196e171SJosh Poimboeuf INIT_LIST_HEAD(&sec->rela_list); 142042ba73fSJosh Poimboeuf hash_init(sec->rela_hash); 143042ba73fSJosh Poimboeuf hash_init(sec->symbol_hash); 144442f04c3SJosh Poimboeuf 145442f04c3SJosh Poimboeuf list_add_tail(&sec->list, &elf->sections); 146442f04c3SJosh Poimboeuf 147442f04c3SJosh Poimboeuf s = elf_getscn(elf->elf, i); 148442f04c3SJosh Poimboeuf if (!s) { 149442f04c3SJosh Poimboeuf perror("elf_getscn"); 150442f04c3SJosh Poimboeuf return -1; 151442f04c3SJosh Poimboeuf } 152442f04c3SJosh Poimboeuf 153442f04c3SJosh Poimboeuf sec->idx = elf_ndxscn(s); 154442f04c3SJosh Poimboeuf 155442f04c3SJosh Poimboeuf if (!gelf_getshdr(s, &sec->sh)) { 156442f04c3SJosh Poimboeuf perror("gelf_getshdr"); 157442f04c3SJosh Poimboeuf return -1; 158442f04c3SJosh Poimboeuf } 159442f04c3SJosh Poimboeuf 160442f04c3SJosh Poimboeuf sec->name = elf_strptr(elf->elf, shstrndx, sec->sh.sh_name); 161442f04c3SJosh Poimboeuf if (!sec->name) { 162442f04c3SJosh Poimboeuf perror("elf_strptr"); 163442f04c3SJosh Poimboeuf return -1; 164442f04c3SJosh Poimboeuf } 165442f04c3SJosh Poimboeuf 166442f04c3SJosh Poimboeuf sec->elf_data = elf_getdata(s, NULL); 167442f04c3SJosh Poimboeuf if (!sec->elf_data) { 168442f04c3SJosh Poimboeuf perror("elf_getdata"); 169442f04c3SJosh Poimboeuf return -1; 170442f04c3SJosh Poimboeuf } 171442f04c3SJosh Poimboeuf 172442f04c3SJosh Poimboeuf if (sec->elf_data->d_off != 0 || 173442f04c3SJosh Poimboeuf sec->elf_data->d_size != sec->sh.sh_size) { 174442f04c3SJosh Poimboeuf WARN("unexpected data attributes for %s", sec->name); 175442f04c3SJosh Poimboeuf return -1; 176442f04c3SJosh Poimboeuf } 177442f04c3SJosh Poimboeuf 178442f04c3SJosh Poimboeuf sec->data = (unsigned long)sec->elf_data->d_buf; 179442f04c3SJosh Poimboeuf sec->len = sec->elf_data->d_size; 180442f04c3SJosh Poimboeuf } 181442f04c3SJosh Poimboeuf 182442f04c3SJosh Poimboeuf /* sanity check, one more call to elf_nextscn() should return NULL */ 183442f04c3SJosh Poimboeuf if (elf_nextscn(elf->elf, s)) { 184442f04c3SJosh Poimboeuf WARN("section entry mismatch"); 185442f04c3SJosh Poimboeuf return -1; 186442f04c3SJosh Poimboeuf } 187442f04c3SJosh Poimboeuf 188442f04c3SJosh Poimboeuf return 0; 189442f04c3SJosh Poimboeuf } 190442f04c3SJosh Poimboeuf 191442f04c3SJosh Poimboeuf static int read_symbols(struct elf *elf) 192442f04c3SJosh Poimboeuf { 193442f04c3SJosh Poimboeuf struct section *symtab; 194442f04c3SJosh Poimboeuf struct symbol *sym; 195442f04c3SJosh Poimboeuf struct list_head *entry, *tmp; 196442f04c3SJosh Poimboeuf int symbols_nr, i; 197442f04c3SJosh Poimboeuf 198442f04c3SJosh Poimboeuf symtab = find_section_by_name(elf, ".symtab"); 199442f04c3SJosh Poimboeuf if (!symtab) { 200442f04c3SJosh Poimboeuf WARN("missing symbol table"); 201442f04c3SJosh Poimboeuf return -1; 202442f04c3SJosh Poimboeuf } 203442f04c3SJosh Poimboeuf 204442f04c3SJosh Poimboeuf symbols_nr = symtab->sh.sh_size / symtab->sh.sh_entsize; 205442f04c3SJosh Poimboeuf 206442f04c3SJosh Poimboeuf for (i = 0; i < symbols_nr; i++) { 207442f04c3SJosh Poimboeuf sym = malloc(sizeof(*sym)); 208442f04c3SJosh Poimboeuf if (!sym) { 209442f04c3SJosh Poimboeuf perror("malloc"); 210442f04c3SJosh Poimboeuf return -1; 211442f04c3SJosh Poimboeuf } 212442f04c3SJosh Poimboeuf memset(sym, 0, sizeof(*sym)); 213442f04c3SJosh Poimboeuf 214442f04c3SJosh Poimboeuf sym->idx = i; 215442f04c3SJosh Poimboeuf 216442f04c3SJosh Poimboeuf if (!gelf_getsym(symtab->elf_data, i, &sym->sym)) { 217442f04c3SJosh Poimboeuf perror("gelf_getsym"); 218442f04c3SJosh Poimboeuf goto err; 219442f04c3SJosh Poimboeuf } 220442f04c3SJosh Poimboeuf 221442f04c3SJosh Poimboeuf sym->name = elf_strptr(elf->elf, symtab->sh.sh_link, 222442f04c3SJosh Poimboeuf sym->sym.st_name); 223442f04c3SJosh Poimboeuf if (!sym->name) { 224442f04c3SJosh Poimboeuf perror("elf_strptr"); 225442f04c3SJosh Poimboeuf goto err; 226442f04c3SJosh Poimboeuf } 227442f04c3SJosh Poimboeuf 228442f04c3SJosh Poimboeuf sym->type = GELF_ST_TYPE(sym->sym.st_info); 229442f04c3SJosh Poimboeuf sym->bind = GELF_ST_BIND(sym->sym.st_info); 230442f04c3SJosh Poimboeuf 231442f04c3SJosh Poimboeuf if (sym->sym.st_shndx > SHN_UNDEF && 232442f04c3SJosh Poimboeuf sym->sym.st_shndx < SHN_LORESERVE) { 233442f04c3SJosh Poimboeuf sym->sec = find_section_by_index(elf, 234442f04c3SJosh Poimboeuf sym->sym.st_shndx); 235442f04c3SJosh Poimboeuf if (!sym->sec) { 236442f04c3SJosh Poimboeuf WARN("couldn't find section for symbol %s", 237442f04c3SJosh Poimboeuf sym->name); 238442f04c3SJosh Poimboeuf goto err; 239442f04c3SJosh Poimboeuf } 240442f04c3SJosh Poimboeuf if (sym->type == STT_SECTION) { 241442f04c3SJosh Poimboeuf sym->name = sym->sec->name; 242442f04c3SJosh Poimboeuf sym->sec->sym = sym; 243442f04c3SJosh Poimboeuf } 244442f04c3SJosh Poimboeuf } else 245442f04c3SJosh Poimboeuf sym->sec = find_section_by_index(elf, 0); 246442f04c3SJosh Poimboeuf 247442f04c3SJosh Poimboeuf sym->offset = sym->sym.st_value; 248442f04c3SJosh Poimboeuf sym->len = sym->sym.st_size; 249442f04c3SJosh Poimboeuf 250442f04c3SJosh Poimboeuf /* sorted insert into a per-section list */ 251a196e171SJosh Poimboeuf entry = &sym->sec->symbol_list; 252a196e171SJosh Poimboeuf list_for_each_prev(tmp, &sym->sec->symbol_list) { 253442f04c3SJosh Poimboeuf struct symbol *s; 254442f04c3SJosh Poimboeuf 255442f04c3SJosh Poimboeuf s = list_entry(tmp, struct symbol, list); 256442f04c3SJosh Poimboeuf 257442f04c3SJosh Poimboeuf if (sym->offset > s->offset) { 258442f04c3SJosh Poimboeuf entry = tmp; 259442f04c3SJosh Poimboeuf break; 260442f04c3SJosh Poimboeuf } 261442f04c3SJosh Poimboeuf 262442f04c3SJosh Poimboeuf if (sym->offset == s->offset && sym->len >= s->len) { 263442f04c3SJosh Poimboeuf entry = tmp; 264442f04c3SJosh Poimboeuf break; 265442f04c3SJosh Poimboeuf } 266442f04c3SJosh Poimboeuf } 267442f04c3SJosh Poimboeuf list_add(&sym->list, entry); 268042ba73fSJosh Poimboeuf hash_add(sym->sec->symbol_hash, &sym->hash, sym->idx); 269442f04c3SJosh Poimboeuf } 270442f04c3SJosh Poimboeuf 271442f04c3SJosh Poimboeuf return 0; 272442f04c3SJosh Poimboeuf 273442f04c3SJosh Poimboeuf err: 274442f04c3SJosh Poimboeuf free(sym); 275442f04c3SJosh Poimboeuf return -1; 276442f04c3SJosh Poimboeuf } 277442f04c3SJosh Poimboeuf 278442f04c3SJosh Poimboeuf static int read_relas(struct elf *elf) 279442f04c3SJosh Poimboeuf { 280442f04c3SJosh Poimboeuf struct section *sec; 281442f04c3SJosh Poimboeuf struct rela *rela; 282442f04c3SJosh Poimboeuf int i; 283442f04c3SJosh Poimboeuf unsigned int symndx; 284442f04c3SJosh Poimboeuf 285442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) { 286442f04c3SJosh Poimboeuf if (sec->sh.sh_type != SHT_RELA) 287442f04c3SJosh Poimboeuf continue; 288442f04c3SJosh Poimboeuf 289442f04c3SJosh Poimboeuf sec->base = find_section_by_name(elf, sec->name + 5); 290442f04c3SJosh Poimboeuf if (!sec->base) { 291442f04c3SJosh Poimboeuf WARN("can't find base section for rela section %s", 292442f04c3SJosh Poimboeuf sec->name); 293442f04c3SJosh Poimboeuf return -1; 294442f04c3SJosh Poimboeuf } 295442f04c3SJosh Poimboeuf 296442f04c3SJosh Poimboeuf sec->base->rela = sec; 297442f04c3SJosh Poimboeuf 298442f04c3SJosh Poimboeuf for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) { 299442f04c3SJosh Poimboeuf rela = malloc(sizeof(*rela)); 300442f04c3SJosh Poimboeuf if (!rela) { 301442f04c3SJosh Poimboeuf perror("malloc"); 302442f04c3SJosh Poimboeuf return -1; 303442f04c3SJosh Poimboeuf } 304442f04c3SJosh Poimboeuf memset(rela, 0, sizeof(*rela)); 305442f04c3SJosh Poimboeuf 306442f04c3SJosh Poimboeuf if (!gelf_getrela(sec->elf_data, i, &rela->rela)) { 307442f04c3SJosh Poimboeuf perror("gelf_getrela"); 308442f04c3SJosh Poimboeuf return -1; 309442f04c3SJosh Poimboeuf } 310442f04c3SJosh Poimboeuf 311442f04c3SJosh Poimboeuf rela->type = GELF_R_TYPE(rela->rela.r_info); 312442f04c3SJosh Poimboeuf rela->addend = rela->rela.r_addend; 313442f04c3SJosh Poimboeuf rela->offset = rela->rela.r_offset; 314442f04c3SJosh Poimboeuf symndx = GELF_R_SYM(rela->rela.r_info); 315442f04c3SJosh Poimboeuf rela->sym = find_symbol_by_index(elf, symndx); 316442f04c3SJosh Poimboeuf if (!rela->sym) { 317442f04c3SJosh Poimboeuf WARN("can't find rela entry symbol %d for %s", 318442f04c3SJosh Poimboeuf symndx, sec->name); 319442f04c3SJosh Poimboeuf return -1; 320442f04c3SJosh Poimboeuf } 321042ba73fSJosh Poimboeuf 322042ba73fSJosh Poimboeuf list_add_tail(&rela->list, &sec->rela_list); 323042ba73fSJosh Poimboeuf hash_add(sec->rela_hash, &rela->hash, rela->offset); 324042ba73fSJosh Poimboeuf 325442f04c3SJosh Poimboeuf } 326442f04c3SJosh Poimboeuf } 327442f04c3SJosh Poimboeuf 328442f04c3SJosh Poimboeuf return 0; 329442f04c3SJosh Poimboeuf } 330442f04c3SJosh Poimboeuf 331442f04c3SJosh Poimboeuf struct elf *elf_open(const char *name) 332442f04c3SJosh Poimboeuf { 333442f04c3SJosh Poimboeuf struct elf *elf; 334442f04c3SJosh Poimboeuf 335442f04c3SJosh Poimboeuf elf_version(EV_CURRENT); 336442f04c3SJosh Poimboeuf 337442f04c3SJosh Poimboeuf elf = malloc(sizeof(*elf)); 338442f04c3SJosh Poimboeuf if (!elf) { 339442f04c3SJosh Poimboeuf perror("malloc"); 340442f04c3SJosh Poimboeuf return NULL; 341442f04c3SJosh Poimboeuf } 342442f04c3SJosh Poimboeuf memset(elf, 0, sizeof(*elf)); 343442f04c3SJosh Poimboeuf 344442f04c3SJosh Poimboeuf INIT_LIST_HEAD(&elf->sections); 345442f04c3SJosh Poimboeuf 346442f04c3SJosh Poimboeuf elf->name = strdup(name); 347442f04c3SJosh Poimboeuf if (!elf->name) { 348442f04c3SJosh Poimboeuf perror("strdup"); 349442f04c3SJosh Poimboeuf goto err; 350442f04c3SJosh Poimboeuf } 351442f04c3SJosh Poimboeuf 352442f04c3SJosh Poimboeuf elf->fd = open(name, O_RDONLY); 353442f04c3SJosh Poimboeuf if (elf->fd == -1) { 354442f04c3SJosh Poimboeuf perror("open"); 355442f04c3SJosh Poimboeuf goto err; 356442f04c3SJosh Poimboeuf } 357442f04c3SJosh Poimboeuf 358442f04c3SJosh Poimboeuf elf->elf = elf_begin(elf->fd, ELF_C_READ_MMAP, NULL); 359442f04c3SJosh Poimboeuf if (!elf->elf) { 360442f04c3SJosh Poimboeuf perror("elf_begin"); 361442f04c3SJosh Poimboeuf goto err; 362442f04c3SJosh Poimboeuf } 363442f04c3SJosh Poimboeuf 364442f04c3SJosh Poimboeuf if (!gelf_getehdr(elf->elf, &elf->ehdr)) { 365442f04c3SJosh Poimboeuf perror("gelf_getehdr"); 366442f04c3SJosh Poimboeuf goto err; 367442f04c3SJosh Poimboeuf } 368442f04c3SJosh Poimboeuf 369442f04c3SJosh Poimboeuf if (read_sections(elf)) 370442f04c3SJosh Poimboeuf goto err; 371442f04c3SJosh Poimboeuf 372442f04c3SJosh Poimboeuf if (read_symbols(elf)) 373442f04c3SJosh Poimboeuf goto err; 374442f04c3SJosh Poimboeuf 375442f04c3SJosh Poimboeuf if (read_relas(elf)) 376442f04c3SJosh Poimboeuf goto err; 377442f04c3SJosh Poimboeuf 378442f04c3SJosh Poimboeuf return elf; 379442f04c3SJosh Poimboeuf 380442f04c3SJosh Poimboeuf err: 381442f04c3SJosh Poimboeuf elf_close(elf); 382442f04c3SJosh Poimboeuf return NULL; 383442f04c3SJosh Poimboeuf } 384442f04c3SJosh Poimboeuf 385442f04c3SJosh Poimboeuf void elf_close(struct elf *elf) 386442f04c3SJosh Poimboeuf { 387442f04c3SJosh Poimboeuf struct section *sec, *tmpsec; 388442f04c3SJosh Poimboeuf struct symbol *sym, *tmpsym; 389442f04c3SJosh Poimboeuf struct rela *rela, *tmprela; 390442f04c3SJosh Poimboeuf 391442f04c3SJosh Poimboeuf list_for_each_entry_safe(sec, tmpsec, &elf->sections, list) { 392a196e171SJosh Poimboeuf list_for_each_entry_safe(sym, tmpsym, &sec->symbol_list, list) { 393442f04c3SJosh Poimboeuf list_del(&sym->list); 394042ba73fSJosh Poimboeuf hash_del(&sym->hash); 395442f04c3SJosh Poimboeuf free(sym); 396442f04c3SJosh Poimboeuf } 397a196e171SJosh Poimboeuf list_for_each_entry_safe(rela, tmprela, &sec->rela_list, list) { 398442f04c3SJosh Poimboeuf list_del(&rela->list); 399042ba73fSJosh Poimboeuf hash_del(&rela->hash); 400442f04c3SJosh Poimboeuf free(rela); 401442f04c3SJosh Poimboeuf } 402442f04c3SJosh Poimboeuf list_del(&sec->list); 403442f04c3SJosh Poimboeuf free(sec); 404442f04c3SJosh Poimboeuf } 405442f04c3SJosh Poimboeuf if (elf->name) 406442f04c3SJosh Poimboeuf free(elf->name); 407442f04c3SJosh Poimboeuf if (elf->fd > 0) 408442f04c3SJosh Poimboeuf close(elf->fd); 409442f04c3SJosh Poimboeuf if (elf->elf) 410442f04c3SJosh Poimboeuf elf_end(elf->elf); 411442f04c3SJosh Poimboeuf free(elf); 412442f04c3SJosh Poimboeuf } 413