sysdeps/i386/dl-tlsdesc.h

   1 /* Thread-local storage descriptor handling in the ELF dynamic linker.
   2    i386 version.
   3    Copyright (C) 2005, 2008 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _I386_DL_TLSDESC_H
  22 # define _I386_DL_TLSDESC_H 1
  23
  24 /* Type used to represent a TLS descriptor in the GOT.  */
  25 struct tlsdesc
  26 {
  27   ptrdiff_t __attribute__ ((regparm (1))) (*entry) (struct tlsdesc *);
  28   void *arg;
  29 };
  30
  31 typedef struct dl_tls_index
  32 {
  33   unsigned long int ti_module;
  34   unsigned long int ti_offset;
  35 } tls_index;
  36
  37 /* Type used as the argument in a TLS descriptor for a symbol that
  38    needs dynamic TLS offsets.  */
  39 struct tlsdesc_dynamic_arg
  40 {
  41   tls_index tlsinfo;
  42   size_t gen_count;
  43 };
  44
  45 extern ptrdiff_t attribute_hidden __attribute__ ((regparm (1)))
  46   _dl_tlsdesc_return (struct tlsdesc *),
  47   _dl_tlsdesc_undefweak (struct tlsdesc *),
  48   _dl_tlsdesc_resolve_abs_plus_addend (struct tlsdesc *),
  49   _dl_tlsdesc_resolve_rel (struct tlsdesc *),
  50   _dl_tlsdesc_resolve_rela (struct tlsdesc *),
  51   _dl_tlsdesc_resolve_hold (struct tlsdesc *);
  52
  53 # ifdef SHARED
  54 extern void *internal_function _dl_make_tlsdesc_dynamic (struct link_map *map,
  55                                                          size_t ti_offset);
  56
  57 extern ptrdiff_t attribute_hidden __attribute__ ((regparm (1)))
  58   _dl_tlsdesc_dynamic (struct tlsdesc *);
  59 # endif
  60
  61 #endif