sysdeps/x86_64/tlsdesc.c

   1 /* Manage TLS descriptors.  x86_64 version.
   2    Copyright (C) 2005-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <ldsodefs.h>
  20 #include <tls.h>
  21 #include <dl-tlsdesc.h>
  22 #include <dl-unmap-segments.h>
  23 #include <tlsdeschtab.h>
  24
  25 /* Unmap the dynamic object, but also release its TLS descriptor table
  26    if there is one.  */
  27
  28 void
  29 _dl_unmap (struct link_map *map)
  30 {
  31   _dl_unmap_segments (map);
  32
  33 #ifdef SHARED
  34   /* _dl_unmap is only called for dlopen()ed libraries, for which
  35      calling free() is safe, or before we've completed the initial
  36      relocation, in which case calling free() is probably pointless,
  37      but still safe.  */
  38   if (map->l_mach.tlsdesc_table)
  39     htab_delete (map->l_mach.tlsdesc_table);
  40 #endif
  41 }