libpthread/nptl/sysdeps/xtensa/dl-tls.h

   1 /* Thread-local storage handling in the ELF dynamic linker.  Xtensa version.
   2    Copyright (C) 2013 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; see the file COPYING.LIB.  If
  17    not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _XTENSA_DL_TLS_H
  20 #define _XTENSA_DL_TLS_H 1
  21
  22 /* Type used for the representation of TLS information in the GOT.  */
  23 typedef struct
  24 {
  25   unsigned long int ti_module;
  26   unsigned long int ti_offset;
  27 } tls_index;
  28
  29 extern void *__tls_get_addr (tls_index *ti);
  30
  31 /* Type used to represent a TLS descriptor.  */
  32 struct tlsdesc
  33 {
  34   union
  35     {
  36       void *pointer;
  37       long value;
  38     } argument;
  39   ptrdiff_t (*entry)(struct tlsdesc *);
  40 };
  41
  42 /* Type used as the argument in a TLS descriptor for a symbol that
  43    needs dynamic TLS offsets.  */
  44 struct tlsdesc_dynamic_arg
  45 {
  46   tls_index tlsinfo;
  47   size_t gen_count;
  48 };
  49
  50 extern ptrdiff_t attribute_hidden
  51   _dl_tlsdesc_return(struct tlsdesc_dynamic_arg *);
  52
  53 extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset);
  54 extern ptrdiff_t attribute_hidden
  55   _dl_tlsdesc_dynamic(struct tlsdesc_dynamic_arg *);
  56
  57 #endif