| /* Get loaded objects program headers. |
| Copyright (C) 2001-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Jakub Jelinek <jakub@redhat.com>, 2001. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <ldsodefs.h> |
| #include <stddef.h> |
| #include <libc-lock.h> |
| |
| static void |
| cancel_handler (void *arg __attribute__((unused))) |
| { |
| __rtld_lock_unlock_recursive (GL(dl_load_write_lock)); |
| } |
| |
| int |
| __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, |
| size_t size, void *data), void *data) |
| { |
| struct link_map *l; |
| struct dl_phdr_info info; |
| int ret = 0; |
| |
| /* Make sure nobody modifies the list of loaded objects. */ |
| __rtld_lock_lock_recursive (GL(dl_load_write_lock)); |
| __libc_cleanup_push (cancel_handler, NULL); |
| |
| /* We have to determine the namespace of the caller since this determines |
| which namespace is reported. */ |
| size_t nloaded = GL(dl_ns)[0]._ns_nloaded; |
| Lmid_t ns = 0; |
| #ifdef SHARED |
| const void *caller = RETURN_ADDRESS (0); |
| for (Lmid_t cnt = GL(dl_nns) - 1; cnt > 0; --cnt) |
| for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next) |
| { |
| /* We have to count the total number of loaded objects. */ |
| nloaded += GL(dl_ns)[cnt]._ns_nloaded; |
| |
| if (caller >= (const void *) l->l_map_start |
| && caller < (const void *) l->l_map_end |
| && (l->l_contiguous |
| || _dl_addr_inside_object (l, (ElfW(Addr)) caller))) |
| ns = cnt; |
| } |
| #endif |
| |
| for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next) |
| { |
| info.dlpi_addr = l->l_real->l_addr; |
| info.dlpi_name = l->l_real->l_name; |
| info.dlpi_phdr = l->l_real->l_phdr; |
| info.dlpi_phnum = l->l_real->l_phnum; |
| info.dlpi_adds = GL(dl_load_adds); |
| info.dlpi_subs = GL(dl_load_adds) - nloaded; |
| info.dlpi_tls_data = NULL; |
| info.dlpi_tls_modid = l->l_real->l_tls_modid; |
| if (info.dlpi_tls_modid != 0) |
| info.dlpi_tls_data = GLRO(dl_tls_get_addr_soft) (l->l_real); |
| ret = callback (&info, sizeof (struct dl_phdr_info), data); |
| if (ret) |
| break; |
| } |
| |
| /* Release the lock. */ |
| __libc_cleanup_pop (0); |
| __rtld_lock_unlock_recursive (GL(dl_load_write_lock)); |
| |
| return ret; |
| } |
| hidden_def (__dl_iterate_phdr) |
| |
| weak_alias (__dl_iterate_phdr, dl_iterate_phdr); |