sysdeps/m68k/dl-tls.h

   1 /* Thread-local storage handling in the ELF dynamic linker.  M68K version.
   2    Copyright (C) 2010, 2011 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21
  22 /* Type used for the representation of TLS information in the GOT.  */
  23 typedef struct
  24 {
  25   unsigned long int ti_module;
  26   unsigned long int ti_offset;
  27 } tls_index;
  28
  29 /* The thread pointer points 0x7000 past the first static TLS block.  */
  30 #define TLS_TP_OFFSET           0x7000
  31
  32 /* Dynamic thread vector pointers point 0x8000 past the start of each
  33    TLS block.  */
  34 #define TLS_DTV_OFFSET          0x8000
  35
  36 /* Compute the value for a TPREL reloc.  */
  37 #define TLS_TPREL_VALUE(sym_map, sym, reloc)                            \
  38   ((sym_map)->l_tls_offset + (sym)->st_value + (reloc)->r_addend        \
  39    - TLS_TP_OFFSET)
  40
  41 /* Compute the value for a DTPREL reloc.  */
  42 #define TLS_DTPREL_VALUE(sym, reloc)                            \
  43   ((sym)->st_value + (reloc)->r_addend - TLS_DTV_OFFSET)
  44
  45 extern void *__tls_get_addr (tls_index *ti);
  46
  47 #define GET_ADDR_OFFSET         (ti->ti_offset + TLS_DTV_OFFSET)
  48 #define __TLS_GET_ADDR(__ti)    (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
  49
  50 /* Value used for dtv entries for which the allocation is delayed.  */
  51 #define TLS_DTV_UNALLOCATED     ((void *) -1l)