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 33774bec3fSArnaldo Carvalho de Melo /* 34774bec3fSArnaldo Carvalho de Melo * Fallback for systems without this "read, mmaping if possible" cmd. 35774bec3fSArnaldo Carvalho de Melo */ 36774bec3fSArnaldo Carvalho de Melo #ifndef ELF_C_READ_MMAP 37774bec3fSArnaldo Carvalho de Melo #define ELF_C_READ_MMAP ELF_C_READ 38774bec3fSArnaldo Carvalho de Melo #endif 39774bec3fSArnaldo Carvalho de Melo 40442f04c3SJosh Poimboeuf struct section *find_section_by_name(struct elf *elf, const char *name) 41442f04c3SJosh Poimboeuf { 42442f04c3SJosh Poimboeuf struct section *sec; 43442f04c3SJosh Poimboeuf 44442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) 45442f04c3SJosh Poimboeuf if (!strcmp(sec->name, name)) 46442f04c3SJosh Poimboeuf return sec; 47442f04c3SJosh Poimboeuf 48442f04c3SJosh Poimboeuf return NULL; 49442f04c3SJosh Poimboeuf } 50442f04c3SJosh Poimboeuf 51442f04c3SJosh Poimboeuf static struct section *find_section_by_index(struct elf *elf, 52442f04c3SJosh Poimboeuf unsigned int idx) 53442f04c3SJosh Poimboeuf { 54442f04c3SJosh Poimboeuf struct section *sec; 55442f04c3SJosh Poimboeuf 56442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) 57442f04c3SJosh Poimboeuf if (sec->idx == idx) 58442f04c3SJosh Poimboeuf return sec; 59442f04c3SJosh Poimboeuf 60442f04c3SJosh Poimboeuf return NULL; 61442f04c3SJosh Poimboeuf } 62442f04c3SJosh Poimboeuf 63442f04c3SJosh Poimboeuf static struct symbol *find_symbol_by_index(struct elf *elf, unsigned int idx) 64442f04c3SJosh Poimboeuf { 65442f04c3SJosh Poimboeuf struct section *sec; 66442f04c3SJosh Poimboeuf struct symbol *sym; 67442f04c3SJosh Poimboeuf 68442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) 69042ba73fSJosh Poimboeuf hash_for_each_possible(sec->symbol_hash, sym, hash, idx) 70442f04c3SJosh Poimboeuf if (sym->idx == idx) 71442f04c3SJosh Poimboeuf return sym; 72442f04c3SJosh Poimboeuf 73442f04c3SJosh Poimboeuf return NULL; 74442f04c3SJosh Poimboeuf } 75442f04c3SJosh Poimboeuf 76442f04c3SJosh Poimboeuf struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset) 77442f04c3SJosh Poimboeuf { 78442f04c3SJosh Poimboeuf struct symbol *sym; 79442f04c3SJosh Poimboeuf 80a196e171SJosh Poimboeuf list_for_each_entry(sym, &sec->symbol_list, list) 81442f04c3SJosh Poimboeuf if (sym->type != STT_SECTION && 82442f04c3SJosh Poimboeuf sym->offset == offset) 83442f04c3SJosh Poimboeuf return sym; 84442f04c3SJosh Poimboeuf 85442f04c3SJosh Poimboeuf return NULL; 86442f04c3SJosh Poimboeuf } 87442f04c3SJosh Poimboeuf 88442f04c3SJosh Poimboeuf struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, 89442f04c3SJosh Poimboeuf unsigned int len) 90442f04c3SJosh Poimboeuf { 91442f04c3SJosh Poimboeuf struct rela *rela; 92042ba73fSJosh Poimboeuf unsigned long o; 93442f04c3SJosh Poimboeuf 94442f04c3SJosh Poimboeuf if (!sec->rela) 95442f04c3SJosh Poimboeuf return NULL; 96442f04c3SJosh Poimboeuf 97042ba73fSJosh Poimboeuf for (o = offset; o < offset + len; o++) 98042ba73fSJosh Poimboeuf hash_for_each_possible(sec->rela->rela_hash, rela, hash, o) 99042ba73fSJosh Poimboeuf if (rela->offset == o) 100442f04c3SJosh Poimboeuf return rela; 101442f04c3SJosh Poimboeuf 102442f04c3SJosh Poimboeuf return NULL; 103442f04c3SJosh Poimboeuf } 104442f04c3SJosh Poimboeuf 105442f04c3SJosh Poimboeuf struct rela *find_rela_by_dest(struct section *sec, unsigned long offset) 106442f04c3SJosh Poimboeuf { 107442f04c3SJosh Poimboeuf return find_rela_by_dest_range(sec, offset, 1); 108442f04c3SJosh Poimboeuf } 109442f04c3SJosh Poimboeuf 110442f04c3SJosh Poimboeuf struct symbol *find_containing_func(struct section *sec, unsigned long offset) 111442f04c3SJosh Poimboeuf { 112442f04c3SJosh Poimboeuf struct symbol *func; 113442f04c3SJosh Poimboeuf 114a196e171SJosh Poimboeuf list_for_each_entry(func, &sec->symbol_list, list) 115442f04c3SJosh Poimboeuf if (func->type == STT_FUNC && offset >= func->offset && 116442f04c3SJosh Poimboeuf offset < func->offset + func->len) 117442f04c3SJosh Poimboeuf return func; 118442f04c3SJosh Poimboeuf 119442f04c3SJosh Poimboeuf return NULL; 120442f04c3SJosh Poimboeuf } 121442f04c3SJosh Poimboeuf 122442f04c3SJosh Poimboeuf static int read_sections(struct elf *elf) 123442f04c3SJosh Poimboeuf { 124442f04c3SJosh Poimboeuf Elf_Scn *s = NULL; 125442f04c3SJosh Poimboeuf struct section *sec; 126442f04c3SJosh Poimboeuf size_t shstrndx, sections_nr; 127442f04c3SJosh Poimboeuf int i; 128442f04c3SJosh Poimboeuf 129442f04c3SJosh Poimboeuf if (elf_getshdrnum(elf->elf, §ions_nr)) { 130442f04c3SJosh Poimboeuf perror("elf_getshdrnum"); 131442f04c3SJosh Poimboeuf return -1; 132442f04c3SJosh Poimboeuf } 133442f04c3SJosh Poimboeuf 134442f04c3SJosh Poimboeuf if (elf_getshdrstrndx(elf->elf, &shstrndx)) { 135442f04c3SJosh Poimboeuf perror("elf_getshdrstrndx"); 136442f04c3SJosh Poimboeuf return -1; 137442f04c3SJosh Poimboeuf } 138442f04c3SJosh Poimboeuf 139442f04c3SJosh Poimboeuf for (i = 0; i < sections_nr; i++) { 140442f04c3SJosh Poimboeuf sec = malloc(sizeof(*sec)); 141442f04c3SJosh Poimboeuf if (!sec) { 142442f04c3SJosh Poimboeuf perror("malloc"); 143442f04c3SJosh Poimboeuf return -1; 144442f04c3SJosh Poimboeuf } 145442f04c3SJosh Poimboeuf memset(sec, 0, sizeof(*sec)); 146442f04c3SJosh Poimboeuf 147a196e171SJosh Poimboeuf INIT_LIST_HEAD(&sec->symbol_list); 148a196e171SJosh Poimboeuf INIT_LIST_HEAD(&sec->rela_list); 149042ba73fSJosh Poimboeuf hash_init(sec->rela_hash); 150042ba73fSJosh Poimboeuf hash_init(sec->symbol_hash); 151442f04c3SJosh Poimboeuf 152442f04c3SJosh Poimboeuf list_add_tail(&sec->list, &elf->sections); 153442f04c3SJosh Poimboeuf 154442f04c3SJosh Poimboeuf s = elf_getscn(elf->elf, i); 155442f04c3SJosh Poimboeuf if (!s) { 156442f04c3SJosh Poimboeuf perror("elf_getscn"); 157442f04c3SJosh Poimboeuf return -1; 158442f04c3SJosh Poimboeuf } 159442f04c3SJosh Poimboeuf 160442f04c3SJosh Poimboeuf sec->idx = elf_ndxscn(s); 161442f04c3SJosh Poimboeuf 162442f04c3SJosh Poimboeuf if (!gelf_getshdr(s, &sec->sh)) { 163442f04c3SJosh Poimboeuf perror("gelf_getshdr"); 164442f04c3SJosh Poimboeuf return -1; 165442f04c3SJosh Poimboeuf } 166442f04c3SJosh Poimboeuf 167442f04c3SJosh Poimboeuf sec->name = elf_strptr(elf->elf, shstrndx, sec->sh.sh_name); 168442f04c3SJosh Poimboeuf if (!sec->name) { 169442f04c3SJosh Poimboeuf perror("elf_strptr"); 170442f04c3SJosh Poimboeuf return -1; 171442f04c3SJosh Poimboeuf } 172442f04c3SJosh Poimboeuf 173442f04c3SJosh Poimboeuf sec->elf_data = elf_getdata(s, NULL); 174442f04c3SJosh Poimboeuf if (!sec->elf_data) { 175442f04c3SJosh Poimboeuf perror("elf_getdata"); 176442f04c3SJosh Poimboeuf return -1; 177442f04c3SJosh Poimboeuf } 178442f04c3SJosh Poimboeuf 179442f04c3SJosh Poimboeuf if (sec->elf_data->d_off != 0 || 180442f04c3SJosh Poimboeuf sec->elf_data->d_size != sec->sh.sh_size) { 181442f04c3SJosh Poimboeuf WARN("unexpected data attributes for %s", sec->name); 182442f04c3SJosh Poimboeuf return -1; 183442f04c3SJosh Poimboeuf } 184442f04c3SJosh Poimboeuf 185442f04c3SJosh Poimboeuf sec->data = (unsigned long)sec->elf_data->d_buf; 186442f04c3SJosh Poimboeuf sec->len = sec->elf_data->d_size; 187442f04c3SJosh Poimboeuf } 188442f04c3SJosh Poimboeuf 189442f04c3SJosh Poimboeuf /* sanity check, one more call to elf_nextscn() should return NULL */ 190442f04c3SJosh Poimboeuf if (elf_nextscn(elf->elf, s)) { 191442f04c3SJosh Poimboeuf WARN("section entry mismatch"); 192442f04c3SJosh Poimboeuf return -1; 193442f04c3SJosh Poimboeuf } 194442f04c3SJosh Poimboeuf 195442f04c3SJosh Poimboeuf return 0; 196442f04c3SJosh Poimboeuf } 197442f04c3SJosh Poimboeuf 198442f04c3SJosh Poimboeuf static int read_symbols(struct elf *elf) 199442f04c3SJosh Poimboeuf { 200442f04c3SJosh Poimboeuf struct section *symtab; 201442f04c3SJosh Poimboeuf struct symbol *sym; 202442f04c3SJosh Poimboeuf struct list_head *entry, *tmp; 203442f04c3SJosh Poimboeuf int symbols_nr, i; 204442f04c3SJosh Poimboeuf 205442f04c3SJosh Poimboeuf symtab = find_section_by_name(elf, ".symtab"); 206442f04c3SJosh Poimboeuf if (!symtab) { 207442f04c3SJosh Poimboeuf WARN("missing symbol table"); 208442f04c3SJosh Poimboeuf return -1; 209442f04c3SJosh Poimboeuf } 210442f04c3SJosh Poimboeuf 211442f04c3SJosh Poimboeuf symbols_nr = symtab->sh.sh_size / symtab->sh.sh_entsize; 212442f04c3SJosh Poimboeuf 213442f04c3SJosh Poimboeuf for (i = 0; i < symbols_nr; i++) { 214442f04c3SJosh Poimboeuf sym = malloc(sizeof(*sym)); 215442f04c3SJosh Poimboeuf if (!sym) { 216442f04c3SJosh Poimboeuf perror("malloc"); 217442f04c3SJosh Poimboeuf return -1; 218442f04c3SJosh Poimboeuf } 219442f04c3SJosh Poimboeuf memset(sym, 0, sizeof(*sym)); 220442f04c3SJosh Poimboeuf 221442f04c3SJosh Poimboeuf sym->idx = i; 222442f04c3SJosh Poimboeuf 223442f04c3SJosh Poimboeuf if (!gelf_getsym(symtab->elf_data, i, &sym->sym)) { 224442f04c3SJosh Poimboeuf perror("gelf_getsym"); 225442f04c3SJosh Poimboeuf goto err; 226442f04c3SJosh Poimboeuf } 227442f04c3SJosh Poimboeuf 228442f04c3SJosh Poimboeuf sym->name = elf_strptr(elf->elf, symtab->sh.sh_link, 229442f04c3SJosh Poimboeuf sym->sym.st_name); 230442f04c3SJosh Poimboeuf if (!sym->name) { 231442f04c3SJosh Poimboeuf perror("elf_strptr"); 232442f04c3SJosh Poimboeuf goto err; 233442f04c3SJosh Poimboeuf } 234442f04c3SJosh Poimboeuf 235442f04c3SJosh Poimboeuf sym->type = GELF_ST_TYPE(sym->sym.st_info); 236442f04c3SJosh Poimboeuf sym->bind = GELF_ST_BIND(sym->sym.st_info); 237442f04c3SJosh Poimboeuf 238442f04c3SJosh Poimboeuf if (sym->sym.st_shndx > SHN_UNDEF && 239442f04c3SJosh Poimboeuf sym->sym.st_shndx < SHN_LORESERVE) { 240442f04c3SJosh Poimboeuf sym->sec = find_section_by_index(elf, 241442f04c3SJosh Poimboeuf sym->sym.st_shndx); 242442f04c3SJosh Poimboeuf if (!sym->sec) { 243442f04c3SJosh Poimboeuf WARN("couldn't find section for symbol %s", 244442f04c3SJosh Poimboeuf sym->name); 245442f04c3SJosh Poimboeuf goto err; 246442f04c3SJosh Poimboeuf } 247442f04c3SJosh Poimboeuf if (sym->type == STT_SECTION) { 248442f04c3SJosh Poimboeuf sym->name = sym->sec->name; 249442f04c3SJosh Poimboeuf sym->sec->sym = sym; 250442f04c3SJosh Poimboeuf } 251442f04c3SJosh Poimboeuf } else 252442f04c3SJosh Poimboeuf sym->sec = find_section_by_index(elf, 0); 253442f04c3SJosh Poimboeuf 254442f04c3SJosh Poimboeuf sym->offset = sym->sym.st_value; 255442f04c3SJosh Poimboeuf sym->len = sym->sym.st_size; 256442f04c3SJosh Poimboeuf 257442f04c3SJosh Poimboeuf /* sorted insert into a per-section list */ 258a196e171SJosh Poimboeuf entry = &sym->sec->symbol_list; 259a196e171SJosh Poimboeuf list_for_each_prev(tmp, &sym->sec->symbol_list) { 260442f04c3SJosh Poimboeuf struct symbol *s; 261442f04c3SJosh Poimboeuf 262442f04c3SJosh Poimboeuf s = list_entry(tmp, struct symbol, list); 263442f04c3SJosh Poimboeuf 264442f04c3SJosh Poimboeuf if (sym->offset > s->offset) { 265442f04c3SJosh Poimboeuf entry = tmp; 266442f04c3SJosh Poimboeuf break; 267442f04c3SJosh Poimboeuf } 268442f04c3SJosh Poimboeuf 269442f04c3SJosh Poimboeuf if (sym->offset == s->offset && sym->len >= s->len) { 270442f04c3SJosh Poimboeuf entry = tmp; 271442f04c3SJosh Poimboeuf break; 272442f04c3SJosh Poimboeuf } 273442f04c3SJosh Poimboeuf } 274442f04c3SJosh Poimboeuf list_add(&sym->list, entry); 275042ba73fSJosh Poimboeuf hash_add(sym->sec->symbol_hash, &sym->hash, sym->idx); 276442f04c3SJosh Poimboeuf } 277442f04c3SJosh Poimboeuf 278442f04c3SJosh Poimboeuf return 0; 279442f04c3SJosh Poimboeuf 280442f04c3SJosh Poimboeuf err: 281442f04c3SJosh Poimboeuf free(sym); 282442f04c3SJosh Poimboeuf return -1; 283442f04c3SJosh Poimboeuf } 284442f04c3SJosh Poimboeuf 285442f04c3SJosh Poimboeuf static int read_relas(struct elf *elf) 286442f04c3SJosh Poimboeuf { 287442f04c3SJosh Poimboeuf struct section *sec; 288442f04c3SJosh Poimboeuf struct rela *rela; 289442f04c3SJosh Poimboeuf int i; 290442f04c3SJosh Poimboeuf unsigned int symndx; 291442f04c3SJosh Poimboeuf 292442f04c3SJosh Poimboeuf list_for_each_entry(sec, &elf->sections, list) { 293442f04c3SJosh Poimboeuf if (sec->sh.sh_type != SHT_RELA) 294442f04c3SJosh Poimboeuf continue; 295442f04c3SJosh Poimboeuf 296442f04c3SJosh Poimboeuf sec->base = find_section_by_name(elf, sec->name + 5); 297442f04c3SJosh Poimboeuf if (!sec->base) { 298442f04c3SJosh Poimboeuf WARN("can't find base section for rela section %s", 299442f04c3SJosh Poimboeuf sec->name); 300442f04c3SJosh Poimboeuf return -1; 301442f04c3SJosh Poimboeuf } 302442f04c3SJosh Poimboeuf 303442f04c3SJosh Poimboeuf sec->base->rela = sec; 304442f04c3SJosh Poimboeuf 305442f04c3SJosh Poimboeuf for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) { 306442f04c3SJosh Poimboeuf rela = malloc(sizeof(*rela)); 307442f04c3SJosh Poimboeuf if (!rela) { 308442f04c3SJosh Poimboeuf perror("malloc"); 309442f04c3SJosh Poimboeuf return -1; 310442f04c3SJosh Poimboeuf } 311442f04c3SJosh Poimboeuf memset(rela, 0, sizeof(*rela)); 312442f04c3SJosh Poimboeuf 313442f04c3SJosh Poimboeuf if (!gelf_getrela(sec->elf_data, i, &rela->rela)) { 314442f04c3SJosh Poimboeuf perror("gelf_getrela"); 315442f04c3SJosh Poimboeuf return -1; 316442f04c3SJosh Poimboeuf } 317442f04c3SJosh Poimboeuf 318442f04c3SJosh Poimboeuf rela->type = GELF_R_TYPE(rela->rela.r_info); 319442f04c3SJosh Poimboeuf rela->addend = rela->rela.r_addend; 320442f04c3SJosh Poimboeuf rela->offset = rela->rela.r_offset; 321442f04c3SJosh Poimboeuf symndx = GELF_R_SYM(rela->rela.r_info); 322442f04c3SJosh Poimboeuf rela->sym = find_symbol_by_index(elf, symndx); 323442f04c3SJosh Poimboeuf if (!rela->sym) { 324442f04c3SJosh Poimboeuf WARN("can't find rela entry symbol %d for %s", 325442f04c3SJosh Poimboeuf symndx, sec->name); 326442f04c3SJosh Poimboeuf return -1; 327442f04c3SJosh Poimboeuf } 328042ba73fSJosh Poimboeuf 329042ba73fSJosh Poimboeuf list_add_tail(&rela->list, &sec->rela_list); 330042ba73fSJosh Poimboeuf hash_add(sec->rela_hash, &rela->hash, rela->offset); 331042ba73fSJosh Poimboeuf 332442f04c3SJosh Poimboeuf } 333442f04c3SJosh Poimboeuf } 334442f04c3SJosh Poimboeuf 335442f04c3SJosh Poimboeuf return 0; 336442f04c3SJosh Poimboeuf } 337442f04c3SJosh Poimboeuf 338442f04c3SJosh Poimboeuf struct elf *elf_open(const char *name) 339442f04c3SJosh Poimboeuf { 340442f04c3SJosh Poimboeuf struct elf *elf; 341442f04c3SJosh Poimboeuf 342442f04c3SJosh Poimboeuf elf_version(EV_CURRENT); 343442f04c3SJosh Poimboeuf 344442f04c3SJosh Poimboeuf elf = malloc(sizeof(*elf)); 345442f04c3SJosh Poimboeuf if (!elf) { 346442f04c3SJosh Poimboeuf perror("malloc"); 347442f04c3SJosh Poimboeuf return NULL; 348442f04c3SJosh Poimboeuf } 349442f04c3SJosh Poimboeuf memset(elf, 0, sizeof(*elf)); 350442f04c3SJosh Poimboeuf 351442f04c3SJosh Poimboeuf INIT_LIST_HEAD(&elf->sections); 352442f04c3SJosh Poimboeuf 353442f04c3SJosh Poimboeuf elf->name = strdup(name); 354442f04c3SJosh Poimboeuf if (!elf->name) { 355442f04c3SJosh Poimboeuf perror("strdup"); 356442f04c3SJosh Poimboeuf goto err; 357442f04c3SJosh Poimboeuf } 358442f04c3SJosh Poimboeuf 359442f04c3SJosh Poimboeuf elf->fd = open(name, O_RDONLY); 360442f04c3SJosh Poimboeuf if (elf->fd == -1) { 361442f04c3SJosh Poimboeuf perror("open"); 362442f04c3SJosh Poimboeuf goto err; 363442f04c3SJosh Poimboeuf } 364442f04c3SJosh Poimboeuf 365442f04c3SJosh Poimboeuf elf->elf = elf_begin(elf->fd, ELF_C_READ_MMAP, NULL); 366442f04c3SJosh Poimboeuf if (!elf->elf) { 367442f04c3SJosh Poimboeuf perror("elf_begin"); 368442f04c3SJosh Poimboeuf goto err; 369442f04c3SJosh Poimboeuf } 370442f04c3SJosh Poimboeuf 371442f04c3SJosh Poimboeuf if (!gelf_getehdr(elf->elf, &elf->ehdr)) { 372442f04c3SJosh Poimboeuf perror("gelf_getehdr"); 373442f04c3SJosh Poimboeuf goto err; 374442f04c3SJosh Poimboeuf } 375442f04c3SJosh Poimboeuf 376442f04c3SJosh Poimboeuf if (read_sections(elf)) 377442f04c3SJosh Poimboeuf goto err; 378442f04c3SJosh Poimboeuf 379442f04c3SJosh Poimboeuf if (read_symbols(elf)) 380442f04c3SJosh Poimboeuf goto err; 381442f04c3SJosh Poimboeuf 382442f04c3SJosh Poimboeuf if (read_relas(elf)) 383442f04c3SJosh Poimboeuf goto err; 384442f04c3SJosh Poimboeuf 385442f04c3SJosh Poimboeuf return elf; 386442f04c3SJosh Poimboeuf 387442f04c3SJosh Poimboeuf err: 388442f04c3SJosh Poimboeuf elf_close(elf); 389442f04c3SJosh Poimboeuf return NULL; 390442f04c3SJosh Poimboeuf } 391442f04c3SJosh Poimboeuf 392442f04c3SJosh Poimboeuf void elf_close(struct elf *elf) 393442f04c3SJosh Poimboeuf { 394442f04c3SJosh Poimboeuf struct section *sec, *tmpsec; 395442f04c3SJosh Poimboeuf struct symbol *sym, *tmpsym; 396442f04c3SJosh Poimboeuf struct rela *rela, *tmprela; 397442f04c3SJosh Poimboeuf 398442f04c3SJosh Poimboeuf list_for_each_entry_safe(sec, tmpsec, &elf->sections, list) { 399a196e171SJosh Poimboeuf list_for_each_entry_safe(sym, tmpsym, &sec->symbol_list, list) { 400442f04c3SJosh Poimboeuf list_del(&sym->list); 401042ba73fSJosh Poimboeuf hash_del(&sym->hash); 402442f04c3SJosh Poimboeuf free(sym); 403442f04c3SJosh Poimboeuf } 404a196e171SJosh Poimboeuf list_for_each_entry_safe(rela, tmprela, &sec->rela_list, list) { 405442f04c3SJosh Poimboeuf list_del(&rela->list); 406042ba73fSJosh Poimboeuf hash_del(&rela->hash); 407442f04c3SJosh Poimboeuf free(rela); 408442f04c3SJosh Poimboeuf } 409442f04c3SJosh Poimboeuf list_del(&sec->list); 410442f04c3SJosh Poimboeuf free(sec); 411442f04c3SJosh Poimboeuf } 412442f04c3SJosh Poimboeuf if (elf->name) 413442f04c3SJosh Poimboeuf free(elf->name); 414442f04c3SJosh Poimboeuf if (elf->fd > 0) 415442f04c3SJosh Poimboeuf close(elf->fd); 416442f04c3SJosh Poimboeuf if (elf->elf) 417442f04c3SJosh Poimboeuf elf_end(elf->elf); 418442f04c3SJosh Poimboeuf free(elf); 419442f04c3SJosh Poimboeuf } 420