sysdeps/aarch64/dl-tlsdesc.h

   1 /* Thread-local storage descriptor handling in the ELF dynamic linker.
   2    AArch64 version.
   3    Copyright (C) 2011-2023 Free Software Foundation, Inc.
   4
   5    This file is part of the GNU C Library.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #ifndef _AARCH64_DL_TLSDESC_H
  22 #define _AARCH64_DL_TLSDESC_H 1
  23
  24 /* Type used to represent a TLS descriptor in the GOT.  */
  25 struct tlsdesc
  26 {
  27   ptrdiff_t (*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
  46 _dl_tlsdesc_return (struct tlsdesc *);
  47
  48 extern ptrdiff_t attribute_hidden
  49 _dl_tlsdesc_undefweak (struct tlsdesc *);
  50
  51 # ifdef SHARED
  52 extern void *_dl_make_tlsdesc_dynamic (struct link_map *, size_t);
  53
  54 extern ptrdiff_t attribute_hidden
  55 _dl_tlsdesc_dynamic (struct tlsdesc *);
  56 #endif
  57
  58 #endif