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, 101 deletions

diff --git a/libc/sysdeps/linux/nds32/mmap.S b/libc/sysdeps/linux/nds32/mmap.S
deleted file mode 100644
index 351d1c502..000000000
--- a/libc/sysdeps/linux/nds32/mmap.S
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * Copyright (C) 2016 Andes Technology, Inc.
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
-
-/* Copyright (C) 1998, 2000, 2003 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, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <sys/syscall.h>
-#include <sysdep.h>
-	.text
-
-.globl __mmap
-ENTRY (__mmap)
-
-#ifdef PIC
-.pic
-#endif
-
-   // reserve space for r0, r1
-#if defined(NDS32_ABI_2) || defined(NDS32_ABI_2FP)
-#else
-   addi  $sp, $sp, -8
-#endif
-   // change to units  of the  system  page  size
-   srli $r5, $r5, 0xc
-
-   syscall SYS_ify(mmap2)
-#if defined(NDS32_ABI_2) || defined(NDS32_ABI_2FP)
-#else
-   addi  $sp, $sp, 8
-#endif
-
-   /* r0 is < -4096 if there was an error.  */
-   bgez $r0, 1f
-   sltsi $r1,$r0,-4096
-   beqz $r1,2f
-
-1:
-   ret
-2:
-#ifdef PIC
-#ifdef __NDS32_N1213_43U1H__
-	! save lp
-	addi	$r2,	$lp,	0
-
-	! set r1 as gp
-	jal	1b
-	sethi	$r1,	hi20(_GLOBAL_OFFSET_TABLE_)
-	ori	$r1,	$r1,	lo12(_GLOBAL_OFFSET_TABLE_+4)
-	add	$r1,	$lp,	$r1
-
-	! restore lp
-	addi	$lp,	$r2,	0
-
-	! r15=SYSCALL_ERROR@PLT
-	sethi $r15, hi20(SYSCALL_ERROR@PLT)
-	ori	$r15,	$r15, lo12(SYSCALL_ERROR@PLT)
-	add	$r15, $r15, $r1
-
-	! jump to SYSCALL_ERROR
-	jr		$r15
-#else
-	! set r1 as gp
-	mfusr $r15, $PC
-	sethi	$r1,	hi20(_GLOBAL_OFFSET_TABLE_+4)
-	ori	$r1,	$r1,	lo12(_GLOBAL_OFFSET_TABLE_+8)
-	add	$r1,	$r1,	$r15
-
-	! r15=SYSCALL_ERROR@PLT
-	sethi $r15, hi20(SYSCALL_ERROR@PLT)
-	ori	$r15,	$r15, lo12(SYSCALL_ERROR@PLT)
-	add	$r15, $r15, $r1
-
-	! jump to SYSCALL_ERROR
-	jr		$r15
-#endif
-#else
-	j SYSCALL_ERROR
-#endif
-
-ret
-
-PSEUDO_END (__mmap)
-
-weak_alias (__mmap, mmap)
-libc_hidden_def(mmap)