linuxthreads_db/td_thr_tls_get_addr.c

   1 /* Get address of thread local variable.
   2    Copyright (C) 2002,2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 2002.
   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 #include <link.h>
  22 #include "thread_dbP.h"
  23
  24 td_err_e
  25 td_thr_tls_get_addr (const td_thrhandle_t *th __attribute__ ((unused)),
  26                      void *map_address __attribute__ ((unused)),
  27                      size_t offset __attribute__ ((unused)),
  28                      void **address __attribute__ ((unused)))
  29 {
  30 #if USE_TLS
  31   /* Read the module ID from the link_map.  */
  32   size_t modid;
  33   if (ps_pdread (th->th_ta_p->ph,
  34                  &((struct link_map *) map_address)->l_tls_modid,
  35                  &modid, sizeof modid) != PS_OK)
  36     return TD_ERR;      /* XXX Other error value?  */
  37
  38   td_err_e result = td_thr_tlsbase (th, modid, address);
  39   if (result == TD_OK)
  40     *address += offset;
  41   return result;
  42 #else
  43   return TD_ERR;
  44 #endif
  45 }