sysdeps/powerpc/dl-tls.h

   1 /* Thread-local storage handling in the ELF dynamic linker.  PowerPC version.
   2    Copyright (C) 2003, 2011 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20
  21 /* Type used for the representation of TLS information in the TOC.  */
  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 #ifdef SHARED
  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 #endif
  50
  51 /* Value used for dtv entries for which the allocation is delayed.  */
  52 #define TLS_DTV_UNALLOCATED     ((void *) -1l)