ports/sysdeps/m68k/dl-tls.h

   1 /* Thread-local storage handling in the ELF dynamic linker.  M68K version.
   2    Copyright (C) 2010-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
   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; without 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
  21 /* Type used for the representation of TLS information in the GOT.  */
  22 typedef struct
  23 {
  24   unsigned long int ti_module;
  25   unsigned long int ti_offset;
  26 } tls_index;
  27
  28 /* The thread pointer points 0x7000 past the first static TLS block.  */
  29 #define TLS_TP_OFFSET           0x7000
  30
  31 /* Dynamic thread vector pointers point 0x8000 past the start of each
  32    TLS block.  */
  33 #define TLS_DTV_OFFSET          0x8000
  34
  35 /* Compute the value for a TPREL reloc.  */
  36 #define TLS_TPREL_VALUE(sym_map, sym, reloc)                            \
  37   ((sym_map)->l_tls_offset + (sym)->st_value + (reloc)->r_addend        \
  38    - TLS_TP_OFFSET)
  39
  40 /* Compute the value for a DTPREL reloc.  */
  41 #define TLS_DTPREL_VALUE(sym, reloc)                            \
  42   ((sym)->st_value + (reloc)->r_addend - TLS_DTV_OFFSET)
  43
  44 extern void *__tls_get_addr (tls_index *ti);
  45
  46 #define GET_ADDR_OFFSET         (ti->ti_offset + TLS_DTV_OFFSET)
  47 #define __TLS_GET_ADDR(__ti)    (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
  48
  49 /* Value used for dtv entries for which the allocation is delayed.  */
  50 #define TLS_DTV_UNALLOCATED     ((void *) -1l)