sysdeps/arm/dl-tlsdesc.h

   1 /* Thread-local storage descriptor handling in the ELF dynamic linker.
   2    ARM version.
   3    Copyright (C) 2005-2019 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; witout 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 _ARM_DL_TLSDESC_H
  21 # define _ARM_DL_TLSDESC_H 1
  22
  23 /* Type used to represent a TLS descriptor in the GOT.  */
  24 struct tlsdesc
  25 {
  26   union
  27     {
  28       void *pointer;
  29       long value;
  30     } argument;
  31   ptrdiff_t (*entry)(struct tlsdesc *);
  32 };
  33
  34
  35 typedef struct dl_tls_index
  36 {
  37   unsigned long int ti_module;
  38   unsigned long int ti_offset;
  39 } tls_index;
  40
  41 /* Type used as the argument in a TLS descriptor for a symbol that
  42    needs dynamic TLS offsets.  */
  43 struct tlsdesc_dynamic_arg
  44 {
  45   tls_index tlsinfo;
  46   size_t gen_count;
  47 };
  48
  49 extern ptrdiff_t attribute_hidden
  50   _dl_tlsdesc_return(struct tlsdesc *),
  51   _dl_tlsdesc_undefweak(struct tlsdesc *);
  52
  53 # ifdef SHARED
  54 extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset);
  55
  56 extern ptrdiff_t attribute_hidden
  57   _dl_tlsdesc_dynamic(struct tlsdesc *);
  58 # endif
  59
  60 #endif