1b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper/* Extract symbol list from binary. 2aec69c7f2adcf9674f025c7f79cbeabbbd4e6b6aMark Wielaard Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2015 Red Hat, Inc. 3de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard This file is part of elfutils. 4b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Written by Ulrich Drepper <drepper@redhat.com>, 1998. 5b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 6de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard This file is free software; you can redistribute it and/or modify 7de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard it under the terms of either 8b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 9de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard * the GNU Lesser General Public License as published by the Free 10de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard Software Foundation; either version 3 of the License, or (at 11de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard your option) any later version 12de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 13de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard or 14de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 15de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard * the GNU General Public License as published by the Free 16de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard Software Foundation; either version 2 of the License, or (at 17de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard your option) any later version 18de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 19de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard or both in parallel, as here. 20de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 21de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard elfutils is distributed in the hope that it will be useful, but 22361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper WITHOUT ANY WARRANTY; without even the implied warranty of 23361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper General Public License for more details. 25b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 26de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard You should have received copies of the GNU General Public License and 27de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard the GNU Lesser General Public License along with this program. If 28de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard not, see <http://www.gnu.org/licenses/>. */ 29b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 30b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#ifdef HAVE_CONFIG_H 31b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper# include <config.h> 32b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#endif 33b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 34b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <fcntl.h> 35b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <gelf.h> 36b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <libelf.h> 37b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <nlist.h> 38b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <unistd.h> 39b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 40b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include "libelfP.h" 41b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 42b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 43b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperstruct hashentry 44b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 45b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper const char *str; 46b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper GElf_Sym sym; 47b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper}; 48b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define TYPE struct hashentry 49b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper/* XXX Use a better hash function some day. */ 50b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define HASHFCT(str, len) INTUSE(elf_hash) (str) 51b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define COMPARE(p1, p2) strcmp ((p1)->str, (p2)->str) 52b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define CLASS static 53b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define PREFIX nlist_ 54b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define xcalloc(n, m) calloc (n, m) 55b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define next_prime(s) __libelf_next_prime (s) 56b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <fixedsizehash.h> 57b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 58b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 59b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperint 60b08d5a8fb42f4586d756068065186b5af7e48daUlrich Dreppernlist (const char *filename, struct nlist *nl) 61b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 62b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper int fd; 63b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf *elf; 64b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf_Scn *scn = NULL; 65b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf_Scn *symscn = NULL; 66b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper GElf_Shdr shdr_mem; 67b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper GElf_Shdr *shdr = NULL; 68b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf_Data *data; 69b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper struct nlist_fshash *table; 70b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper size_t nsyms; 71b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper size_t cnt; 72b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 73b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Open the file. */ 74b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper fd = open (filename, O_RDONLY); 75b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (fd == -1) 76b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 77b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper __libelf_seterrno (ELF_E_NOFILE); 78b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail; 79b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 80b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 81b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* For compatibility reasons (`nlist' existed before ELF and libelf) 82b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper we don't expect the caller to set the ELF version. Do this here 83b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if it hasn't happened yet. */ 84b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (__libelf_version_initialized == 0) 85b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper INTUSE(elf_version) (EV_CURRENT); 86b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 87b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Now get an ELF descriptor. */ 88b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper elf = INTUSE(elf_begin) (fd, ELF_C_READ_MMAP, NULL); 89b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (elf == NULL) 90cd8a250aa139016def485e91d2da49c87de3baecUlrich Drepper goto fail_fd; 91b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 92b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Find a symbol table. We prefer the real symbol table but if it 93b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper does not exist use the dynamic symbol table. */ 94b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper while ((scn = INTUSE(elf_nextscn) (elf, scn)) != NULL) 95b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 96b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper shdr = INTUSE(gelf_getshdr) (scn, &shdr_mem); 97b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (shdr == NULL) 98b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail_close; 99b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 100b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* That is what we are looking for. */ 101b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (shdr->sh_type == SHT_SYMTAB) 102b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 103b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper symscn = scn; 104b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 105b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 106b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 107b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Better than nothing. Remember this section. */ 108b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (shdr->sh_type == SHT_DYNSYM) 109b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper symscn = scn; 110b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 111b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 112b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (symscn == NULL) 113b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* We haven't found anything. Fail. */ 114b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail_close; 115b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 116b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Re-get the section header in case we found only the dynamic symbol 117b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper table. */ 118b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (scn == NULL) 119aec69c7f2adcf9674f025c7f79cbeabbbd4e6b6aMark Wielaard { 120aec69c7f2adcf9674f025c7f79cbeabbbd4e6b6aMark Wielaard shdr = INTUSE(gelf_getshdr) (symscn, &shdr_mem); 121aec69c7f2adcf9674f025c7f79cbeabbbd4e6b6aMark Wielaard if (unlikely (shdr == NULL)) 122aec69c7f2adcf9674f025c7f79cbeabbbd4e6b6aMark Wielaard goto fail_close; 123aec69c7f2adcf9674f025c7f79cbeabbbd4e6b6aMark Wielaard } 124b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* SHDR->SH_LINK now contains the index of the string section. */ 125b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 126b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Get the data for the symbol section. */ 127b4d6f0f8064f2b706ea9035ef0393d8299671390Roland McGrath data = INTUSE(elf_getdata) (symscn, NULL); 128b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (data == NULL) 129b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail_close; 130b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 131b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* How many symbols are there? */ 132b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nsyms = (shdr->sh_size 133a2b964c7dbbf54162b2c50931c172568fb4cfa70Mark Wielaard / INTUSE(gelf_fsize) (elf, ELF_T_SYM, 1, EV_CURRENT)); 134b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 135b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Create the hash table. */ 136b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper table = nlist_fshash_init (nsyms); 137b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (table == NULL) 138b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 139b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper __libelf_seterrno (ELF_E_NOMEM); 140b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail_close; 141b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 142b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 143b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Iterate over all the symbols in the section. */ 144b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper for (cnt = 0; cnt < nsyms; ++cnt) 145b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 146b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper struct hashentry mem; 147b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper GElf_Sym *sym; 148b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 149b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Get the symbol. */ 150b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper sym = INTUSE(gelf_getsym) (data, cnt, &mem.sym); 151b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (sym == NULL) 152b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail_dealloc; 153b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 154b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Get the name of the symbol. */ 155b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper mem.str = INTUSE(elf_strptr) (elf, shdr->sh_link, sym->st_name); 156b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (mem.str == NULL) 157b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto fail_dealloc; 158b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 159b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Don't allow zero-length strings. */ 160b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (mem.str[0] == '\0') 161b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper continue; 162b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 163b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* And add it to the hash table. Note that we are using the 164b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper overwrite version. This will ensure that 165b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper a) global symbols are preferred over local symbols since 166b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper they are all located at the end 167b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper b) if there are multiple local symbols with the same name 168b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper the last one is used. 169b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper */ 170b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper (void) nlist_fshash_overwrite (table, mem.str, 0, &mem); 171b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 172b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 173b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Now it is time to look for the symbols the user asked for. 174b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper XXX What is a `null name/null string'? This is what the 175b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper standard says terminates the list. Is it a null pointer 176b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper or a zero-length string? We test for both... */ 177b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper while (nl->n_name != NULL && nl->n_name[0] != '\0') 178b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 179b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper struct hashentry search; 180b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper const struct hashentry *found; 181b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 182b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Search for a matching entry in the hash table. */ 183b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper search.str = nl->n_name; 184b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper found = nlist_fshash_find (table, nl->n_name, 0, &search); 185b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 186b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (found != NULL) 187b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 188b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Found it. */ 189b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_value = found->sym.st_value; 190b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_scnum = found->sym.st_shndx; 191b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_type = GELF_ST_TYPE (found->sym.st_info); 192b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* XXX What shall we fill in the next fields? */ 193b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_sclass = 0; 194b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_numaux = 0; 195b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 196b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper else 197b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 198b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Not there. */ 199b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_value = 0; 200b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_scnum = 0; 201b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_type = 0; 202b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_sclass = 0; 203b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_numaux = 0; 204b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 205b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 206b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Next search request. */ 207b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper ++nl; 208b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 209b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 210b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Free the resources. */ 211b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nlist_fshash_fini (table); 212b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 213b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* We do not need the ELF descriptor anymore. */ 214b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper (void) INTUSE(elf_end) (elf); 215b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 216ecf2b124a22590ac47688a6e8c2ff8865d23f774Ulrich Drepper /* Neither the file descriptor. */ 217ecf2b124a22590ac47688a6e8c2ff8865d23f774Ulrich Drepper (void) close (fd); 218ecf2b124a22590ac47688a6e8c2ff8865d23f774Ulrich Drepper 219b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return 0; 220b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 221b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper fail_dealloc: 222b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nlist_fshash_fini (table); 223b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 224b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper fail_close: 225b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* We do not need the ELF descriptor anymore. */ 226b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper (void) INTUSE(elf_end) (elf); 227b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 228cd8a250aa139016def485e91d2da49c87de3baecUlrich Drepper fail_fd: 229ecf2b124a22590ac47688a6e8c2ff8865d23f774Ulrich Drepper /* Neither the file descriptor. */ 230ecf2b124a22590ac47688a6e8c2ff8865d23f774Ulrich Drepper (void) close (fd); 231ecf2b124a22590ac47688a6e8c2ff8865d23f774Ulrich Drepper 232b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper fail: 233b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* We have to set all entries to zero. */ 234b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper while (nl->n_name != NULL && nl->n_name[0] != '\0') 235b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 236b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_value = 0; 237b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_scnum = 0; 238b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_type = 0; 239b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_sclass = 0; 240b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper nl->n_numaux = 0; 241b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 242b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Next entry. */ 243b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper ++nl; 244b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 245b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 246b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return -1; 247b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 248