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, 0 insertions, 40 deletions

diff --git a/libc/sysdeps/linux/nds32/sigaction.c b/libc/sysdeps/linux/nds32/sigaction.c
deleted file mode 100644
index 1a24c49b4..000000000
--- a/libc/sysdeps/linux/nds32/sigaction.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2016 Andes Technology, Inc.
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
-
-#include <errno.h>
-#include <signal.h>
-#include <sys/syscall.h>
-#include <string.h>
-#include <bits/kernel_sigaction.h>
-
-#define SA_RESTORER	0x04000000
-
-extern void __default_sa_restorer(void);
-
-int __libc_sigaction(int sig, const struct sigaction *act,
-					  struct sigaction *oact)
-{
-	struct sigaction kact;
-
-	if (act && !(act->sa_flags & SA_RESTORER)) {
-		memcpy(&kact, act, sizeof(kact));
-		kact.sa_restorer = __default_sa_restorer;
-		kact.sa_flags |= SA_RESTORER;
-		act = &kact;
-	}
-	/* NB: kernel (as of 2.6.25) will return EINVAL
-	 * if sizeof(act->sa_mask) does not match kernel's sizeof(sigset_t) */
-	return __syscall_rt_sigaction(sig, act, oact, sizeof(act->sa_mask));
-}
-
-#ifndef LIBC_SIGACTION
-# ifndef __UCLIBC_HAS_THREADS__
-strong_alias(__libc_sigaction,sigaction)
-libc_hidden_def(sigaction)
-# else
-weak_alias(__libc_sigaction,sigaction)
-libc_hidden_weak(sigaction)
-# endif
-#endif