ports/sysdeps/mips/dl-tls.h

   1 /* Thread-local storage handling in the ELF dynamic linker.  MIPS version.
   2    Copyright (C) 2005-2014 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    <http://www.gnu.org/licenses/>.  */
  18
  19
  20 /* Type used for the representation of TLS information in the GOT.  */
  21 typedef struct
  22 {
  23   unsigned long int ti_module;
  24   unsigned long int ti_offset;
  25 } tls_index;
  26
  27 /* The thread pointer points 0x7000 past the first static TLS block.  */
  28 #define TLS_TP_OFFSET           0x7000
  29
  30 /* Dynamic thread vector pointers point 0x8000 past the start of each
  31    TLS block.  */
  32 #define TLS_DTV_OFFSET          0x8000
  33
  34 /* Compute the value for a GOTTPREL reloc.  */
  35 #define TLS_TPREL_VALUE(sym_map, sym) \
  36   ((sym_map)->l_tls_offset + (sym)->st_value - TLS_TP_OFFSET)
  37
  38 /* Compute the value for a DTPREL reloc.  */
  39 #define TLS_DTPREL_VALUE(sym) \
  40   ((sym)->st_value - TLS_DTV_OFFSET)
  41
  42 extern void *__tls_get_addr (tls_index *ti);
  43
  44 # define GET_ADDR_OFFSET        (ti->ti_offset + TLS_DTV_OFFSET)
  45 # define __TLS_GET_ADDR(__ti)   (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
  46
  47 /* Value used for dtv entries for which the allocation is delayed.  */
  48 #define TLS_DTV_UNALLOCATED     ((void *) -1l)