nds32: add NPTL/TLS, *context function, libm changes and code cleanup

This commit includes following features.
1. Support NPTL/TLS
2. Add libm function which is used to handle FP rounding and excpetions
   (ex: fclrexcpt,fedisblxcpti,feenablxcpt... )
3. Add *context function for operating user context
   (ex: setcontext,getcontext,makecontext... )
4. Change the return flow from signal handler
5. Cleanup of old code

The testsuite only has 2 errors, tst-cpuclock1 and tst-cputimer1,
which are related to timing accuracy. (math and locale tests are disabled)

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/libpthread/nptl/sysdeps/nds32/dl-tls.h b/libpthread/nptl/sysdeps/nds32/dl-tls.h
new file mode 100644
index 000000000..3b11e7f42
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/dl-tls.h
@@ -0,0 +1,59 @@
+/* Thread-local storage handling in the ELF dynamic linker.  NDS32 version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _NDS32_DL_TLS_H
+#define _NDS32_DL_TLS_H 1
+
+
+/* Type used to represent a TLS descriptor.  */
+struct tlsdesc
+{
+  ptrdiff_t (*entry)(struct tlsdesc *);
+  union
+    {
+      void *pointer;
+      long value;
+    } argument;
+};
+
+/* Type used for the representation of TLS information in the GOT.  */
+typedef struct
+{
+  unsigned long int ti_module;
+  unsigned long int ti_offset;
+} tls_index;
+
+
+/* Type used as the argument in a TLS descriptor for a symbol that
+ *    needs dynamic TLS offsets.  */
+struct tlsdesc_dynamic_arg
+{
+  tls_index tlsinfo;
+  size_t gen_count;
+};
+
+
+extern void *__tls_get_addr (tls_index *ti);
+
+extern ptrdiff_t attribute_hidden
+  _dl_tlsdesc_return(struct tlsdesc_dynamic_arg *);
+
+extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset);
+extern ptrdiff_t attribute_hidden
+  _dl_tlsdesc_dynamic(struct tlsdesc *);
+
+#endif //_NDS32_DL_TLS_H