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2f84cc6a RM |
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. | |
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 | #include "thread_dbP.h" | |
21 | ||
2f84cc6a RM |
22 | td_err_e |
23 | td_thr_tlsbase (const td_thrhandle_t *th, | |
24 | unsigned long int modid, | |
25 | psaddr_t *base) | |
26 | { | |
7f08f55a RM |
27 | td_err_e err; |
28 | psaddr_t dtv, dtvptr; | |
29 | ||
2f84cc6a RM |
30 | if (modid < 1) |
31 | return TD_NOTLS; | |
32 | ||
2f84cc6a | 33 | /* Get the DTV pointer from the thread descriptor. */ |
7f08f55a RM |
34 | err = DB_GET_FIELD (dtv, th->th_ta_p, th->th_unique, pthread, dtvp, 0); |
35 | if (err != TD_OK) | |
36 | return err; | |
2f84cc6a RM |
37 | |
38 | /* Get the corresponding entry in the DTV. */ | |
7f08f55a RM |
39 | err = DB_GET_FIELD (dtvptr, th->th_ta_p, dtv, dtv, dtv, modid); |
40 | if (err != TD_OK) | |
41 | return err; | |
2f84cc6a RM |
42 | |
43 | /* It could be that the memory for this module is not allocated for | |
44 | the given thread. */ | |
7f08f55a | 45 | if ((uintptr_t) dtvptr & 1) |
2f84cc6a RM |
46 | return TD_TLSDEFER; |
47 | ||
7f08f55a | 48 | *base = dtvptr; |
2f84cc6a | 49 | return TD_OK; |
2f84cc6a | 50 | } |