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authorAustin Foxley <austinf@cetoncorp.com>2009-10-17 12:32:38 -0700
committerAustin Foxley <austinf@cetoncorp.com>2009-10-17 12:32:38 -0700
commita319d590551ff74bbc4de51243e2d5f20ac4c7fd (patch)
tree42d47f646024d14c02cff053d6907de25fa77d70 /libpthread/nptl_db/td_thr_tlsbase.c
parentc68d0fa2d88fc2134a38d99e7e944828384a7671 (diff)
libpthread/nptl_db: debugging support for nptl
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libpthread/nptl_db/td_thr_tlsbase.c')
-rw-r--r--libpthread/nptl_db/td_thr_tlsbase.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/libpthread/nptl_db/td_thr_tlsbase.c b/libpthread/nptl_db/td_thr_tlsbase.c
new file mode 100644
index 000000000..aaeda6f3c
--- /dev/null
+++ b/libpthread/nptl_db/td_thr_tlsbase.c
@@ -0,0 +1,55 @@
+/* Locate TLS data for a thread.
+ Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include "thread_dbP.h"
+
+td_err_e
+td_thr_tlsbase (const td_thrhandle_t *th,
+ unsigned long int modid,
+ psaddr_t *base)
+{
+ td_err_e err;
+ psaddr_t dtv, dtvslot, dtvptr;
+
+ if (modid < 1)
+ return TD_NOTLS;
+
+ /* Get the DTV pointer from the thread descriptor. */
+ err = DB_GET_FIELD (dtv, th->th_ta_p, th->th_unique, pthread, dtvp, 0);
+ if (err != TD_OK)
+ return err;
+
+ /* Find the corresponding entry in the DTV. */
+ err = DB_GET_FIELD_ADDRESS (dtvslot, th->th_ta_p, dtv, dtv, dtv, modid);
+ if (err != TD_OK)
+ return err;
+
+ /* Extract the TLS block address from that DTV slot. */
+ err = DB_GET_FIELD (dtvptr, th->th_ta_p, dtvslot, dtv_t, pointer_val, 0);
+ if (err != TD_OK)
+ return err;
+
+ /* It could be that the memory for this module is not allocated for
+ the given thread. */
+ if ((uintptr_t) dtvptr & 1)
+ return TD_TLSDEFER;
+
+ *base = dtvptr;
+ return TD_OK;
+}