sysdeps/loongarch/dl-tls.h

   1 /* Thread-local storage handling in the ELF dynamic linker.
   2    Copyright (C) 2022-2023 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.  If not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* Type used for the representation of TLS information in the GOT.  */
  20 typedef struct
  21 {
  22   unsigned long int ti_module;
  23   unsigned long int ti_offset;
  24 } tls_index;
  25
  26 /* The thread pointer points to the first static TLS block.  */
  27 #define TLS_TP_OFFSET 0
  28
  29 /* Dynamic thread vector pointers point to the start of each
  30    TLS block.  */
  31 #define TLS_DTV_OFFSET 0
  32
  33 /* Compute the value for a GOTTPREL reloc.  */
  34 #define TLS_TPREL_VALUE(sym_map, sym) \
  35   ((sym_map)->l_tls_offset + (sym)->st_value - TLS_TP_OFFSET)
  36
  37 /* Compute the value for a DTPREL reloc.  */
  38 #define TLS_DTPREL_VALUE(sym) ((sym)->st_value - TLS_DTV_OFFSET)
  39
  40 extern void *__tls_get_addr (tls_index *ti);
  41
  42 #define GET_ADDR_OFFSET (ti->ti_offset + TLS_DTV_OFFSET)
  43 #define __TLS_GET_ADDR(__ti) (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
  44
  45 /* Value used for dtv entries for which the allocation is delayed.  */
  46 #define TLS_DTV_UNALLOCATED ((void *) -1l)