* sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Fix typo.
[glibc.git] / nptl_db / td_thr_tlsbase.c
blobc57009a73ca23669891917ba927e623b0631f9e6
1 /* Locate TLS data for a thread.
2 Copyright (C) 2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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. */
20 #include "thread_dbP.h"
22 td_err_e
23 td_thr_tlsbase (const td_thrhandle_t *th,
24 unsigned long int modid,
25 psaddr_t *base)
27 td_err_e err;
28 psaddr_t dtv, dtvptr;
30 if (modid < 1)
31 return TD_NOTLS;
33 /* Get the DTV pointer from the thread descriptor. */
34 err = DB_GET_FIELD (dtv, th->th_ta_p, th->th_unique, pthread, dtvp, 0);
35 if (err != TD_OK)
36 return err;
38 /* Get the corresponding entry in the DTV. */
39 err = DB_GET_FIELD (dtvptr, th->th_ta_p, dtv, dtv, dtv, modid);
40 if (err != TD_OK)
41 return err;
43 /* It could be that the memory for this module is not allocated for
44 the given thread. */
45 if ((uintptr_t) dtvptr & 1)
46 return TD_TLSDEFER;
48 *base = dtvptr;
49 return TD_OK;