nptl_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,
  26                      psaddr_t map_address, size_t offset, psaddr_t *address)
  27 {
  28   td_err_e err;
  29   psaddr_t modid;
  30
  31   /* Get the TLS module ID from the `struct link_map' in the inferior.  */
  32   err = DB_GET_FIELD (modid, th->th_ta_p, map_address, link_map,
  33                       l_tls_modid, 0);
  34   if (err == TD_NOCAPAB)
  35     return TD_NOAPLIC;
  36   if (err == TD_OK)
  37     {
  38       err = td_thr_tlsbase (th, (uintptr_t) modid, address);
  39       if (err == TD_OK)
  40         *address += offset;
  41     }
  42   return err;
  43 }