88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/* Get loaded objects program headers.
|
|
Copyright (C) 2001-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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 <https://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);
|