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89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/* Get loaded objects program headers.
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Copyright (C) 2001-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <ldsodefs.h>
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#include <stddef.h>
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#include <libc-lock.h>
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static void
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cancel_handler (void *arg __attribute__((unused)))
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{
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__rtld_lock_unlock_recursive (GL(dl_load_write_lock));
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}
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int
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__dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
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size_t size, void *data), void *data)
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{
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struct link_map *l;
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struct dl_phdr_info info;
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int ret = 0;
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/* Make sure nobody modifies the list of loaded objects. */
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__rtld_lock_lock_recursive (GL(dl_load_write_lock));
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__libc_cleanup_push (cancel_handler, NULL);
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/* We have to determine the namespace of the caller since this determines
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which namespace is reported. */
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size_t nloaded = GL(dl_ns)[0]._ns_nloaded;
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Lmid_t ns = 0;
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#ifdef SHARED
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const void *caller = RETURN_ADDRESS (0);
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for (Lmid_t cnt = GL(dl_nns) - 1; cnt > 0; --cnt)
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for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next)
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{
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/* We have to count the total number of loaded objects. */
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nloaded += GL(dl_ns)[cnt]._ns_nloaded;
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if (caller >= (const void *) l->l_map_start
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&& caller < (const void *) l->l_map_end
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&& (l->l_contiguous
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|| _dl_addr_inside_object (l, (ElfW(Addr)) caller)))
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ns = cnt;
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}
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#endif
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for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)
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{
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info.dlpi_addr = l->l_real->l_addr;
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info.dlpi_name = l->l_real->l_name;
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info.dlpi_phdr = l->l_real->l_phdr;
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info.dlpi_phnum = l->l_real->l_phnum;
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info.dlpi_adds = GL(dl_load_adds);
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info.dlpi_subs = GL(dl_load_adds) - nloaded;
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info.dlpi_tls_data = NULL;
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info.dlpi_tls_modid = l->l_real->l_tls_modid;
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if (info.dlpi_tls_modid != 0)
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info.dlpi_tls_data = GLRO(dl_tls_get_addr_soft) (l->l_real);
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ret = callback (&info, sizeof (struct dl_phdr_info), data);
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if (ret)
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break;
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}
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/* Release the lock. */
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__libc_cleanup_pop (0);
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__rtld_lock_unlock_recursive (GL(dl_load_write_lock));
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return ret;
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}
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hidden_def (__dl_iterate_phdr)
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weak_alias (__dl_iterate_phdr, dl_iterate_phdr);
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