libpthread/nptl/sysdeps/aarch64/dl-tls.h

   1 /* Copyright (C) 2005-2017 Free Software Foundation, Inc.
   2
   3    The GNU C Library is free software; you can redistribute it and/or
   4    modify it under the terms of the GNU Lesser General Public License as
   5    published by the Free Software Foundation; either version 2.1 of the
   6    License, or (at your option) any later version.
   7
   8    The GNU C Library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Lesser General Public License for more details.
  12
  13    You should have received a copy of the GNU Lesser General Public
  14    License along with the GNU C Library; if not, see
  15    <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _AARCH64_DL_TLS_H
  18 #define _AARCH64_DL_TLS_H 1
  19
  20 /* Type used to represent a TLS descriptor in the GOT.  */
  21 struct tlsdesc
  22 {
  23   ptrdiff_t (*entry) (struct tlsdesc *);
  24   void *arg;
  25 };
  26
  27 typedef struct dl_tls_index
  28 {
  29   unsigned long int ti_module;
  30   unsigned long int ti_offset;
  31 } tls_index;
  32
  33 /* Type used as the argument in a TLS descriptor for a symbol that
  34    needs dynamic TLS offsets.  */
  35 struct tlsdesc_dynamic_arg
  36 {
  37   tls_index tlsinfo;
  38   size_t gen_count;
  39 };
  40
  41 extern ptrdiff_t attribute_hidden
  42 _dl_tlsdesc_return (struct tlsdesc *);
  43
  44 # ifdef SHARED
  45 extern void *_dl_make_tlsdesc_dynamic (struct link_map *, size_t);
  46
  47 extern ptrdiff_t attribute_hidden
  48 _dl_tlsdesc_dynamic (struct tlsdesc *);
  49 # endif
  50
  51 extern void *__tls_get_addr (tls_index *ti);
  52
  53 #define TLS_DTV_UNALLOCATED ((void *) -1l)
  54
  55 #endif