-/* dlclose -- Close a handle opened by `dlopen'.
-Copyright (C) 1995, 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Close a handle opened by `dlopen'.
+ Copyright (C) 1995, 1996, 1997, 1998 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 Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
-Library General Public License for more details.
+ 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
+ Library General Public License for more details.
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
-#include <link.h>
#include <dlfcn.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/mman.h>
+#include <elf/ldsodefs.h>
-
-#define LOSE(s) _dl_signal_error (0, map->l_name, s)
+static void
+dlclose_doit (void *handle)
+{
+ _dl_close (handle);
+}
int
dlclose (void *handle)
{
- void doit (void)
- {
- struct link_map *map = handle;
- struct link_map **list;
- unsigned int i;
-
- if (map->l_opencount == 0)
- LOSE ("shared object not open");
-
- /* Decrement the reference count. */
- if (--map->l_opencount > 0 || map->l_type != lt_loaded)
- /* There are still references to this object. Do nothing more. */
- return;
-
- list = map->l_searchlist;
-
- /* The search list contains a counted reference to each object it
- points to, the 0th elt being MAP itself. Decrement the reference
- counts on all the objects MAP depends on. */
- for (i = 1; i < map->l_nsearchlist; ++i)
- --list[i]->l_opencount;
-
- /* Clear the search list so it doesn't get freed while we are still
- using it. We have cached it in LIST and will free it when
- finished. */
- map->l_searchlist = NULL;
-
- /* Check each element of the search list to see if all references to
- it are gone. */
- for (i = 0; i < map->l_nsearchlist; ++i)
- {
- struct link_map *map = list[i];
- if (map->l_opencount == 0 && map->l_type == lt_loaded)
- {
- /* That was the last reference, and this was a dlopen-loaded
- object. We can unmap it. */
- const Elf32_Phdr *ph;
-
- if (map->l_info[DT_FINI])
- /* Call its termination function. */
- (*(void (*) (void)) ((void *) map->l_addr +
- map->l_info[DT_FINI]->d_un.d_ptr)) ();
-
- /* Unmap the segments. */
- for (ph = map->l_phdr; ph < &map->l_phdr[map->l_phnum]; ++ph)
- if (ph->p_type == PT_LOAD)
- {
- Elf32_Addr mapstart = ph->p_vaddr & ~(ph->p_align - 1);
- Elf32_Addr mapend = ((ph->p_vaddr + ph->p_memsz
- + ph->p_align - 1)
- & ~(ph->p_align - 1));
- munmap ((caddr_t) mapstart, mapend - mapstart);
- }
-
- /* Finally, unlink the data structure and free it. */
- map->l_prev->l_next = map->l_next;
- if (map->l_next)
- map->l_next->l_prev = map->l_prev;
- if (map->l_searchlist)
- free (map->l_searchlist);
- free (map);
- }
- }
-
- free (list);
- }
-
- return _dlerror_run (doit) ? -1 : 0;
+ return _dlerror_run (dlclose_doit, handle) ? -1 : 0;
}
-
projects / kopensolaris-gnu / glibc.git / blobdiff