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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _PPC_DL_TLS_H
  20 # define _PPC_DL_TLS_H 1
  21
  22 /* Type used for the representation of TLS information in the TOC.  */
  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 #ifdef SHARED
  46 extern void *__tls_get_addr (tls_index *ti);
  47
  48 # define GET_ADDR_OFFSET        (ti->ti_offset + TLS_DTV_OFFSET)
  49 # define __TLS_GET_ADDR(__ti)   (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
  50 #endif
  51
  52 /* Value used for dtv entries for which the allocation is delayed.  */
  53 #define TLS_DTV_UNALLOCATED     ((void *) -1l)
  54
  55 #endif /* dl-tls.h */