sysdeps/i386/dl-tlsdesc.h

   1 /* Thread-local storage descriptor handling in the ELF dynamic linker.
   2    i386 version.
   3    Copyright (C) 2005-2017 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _I386_DL_TLSDESC_H
  21 # define _I386_DL_TLSDESC_H 1
  22
  23 /* Type used to represent a TLS descriptor in the GOT.  */
  24 struct tlsdesc
  25 {
  26   ptrdiff_t __attribute__ ((regparm (1))) (*entry) (struct tlsdesc *);
  27   void *arg;
  28 };
  29
  30 typedef struct dl_tls_index
  31 {
  32   unsigned long int ti_module;
  33   unsigned long int ti_offset;
  34 } tls_index;
  35
  36 /* Type used as the argument in a TLS descriptor for a symbol that
  37    needs dynamic TLS offsets.  */
  38 struct tlsdesc_dynamic_arg
  39 {
  40   tls_index tlsinfo;
  41   size_t gen_count;
  42 };
  43
  44 extern ptrdiff_t attribute_hidden __attribute__ ((regparm (1)))
  45   _dl_tlsdesc_return (struct tlsdesc *),
  46   _dl_tlsdesc_undefweak (struct tlsdesc *),
  47   _dl_tlsdesc_resolve_abs_plus_addend (struct tlsdesc *),
  48   _dl_tlsdesc_resolve_rel (struct tlsdesc *),
  49   _dl_tlsdesc_resolve_rela (struct tlsdesc *),
  50   _dl_tlsdesc_resolve_hold (struct tlsdesc *);
  51
  52 # ifdef SHARED
  53 extern void *_dl_make_tlsdesc_dynamic (struct link_map *map,
  54                                        size_t ti_offset)
  55   internal_function attribute_hidden;
  56
  57 extern ptrdiff_t attribute_hidden __attribute__ ((regparm (1)))
  58   _dl_tlsdesc_dynamic (struct tlsdesc *);
  59 # endif
  60
  61 #endif