From ee92c0fe5c1b9d59508273916e2c9a75b68dbc13 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Thu, 21 Apr 2016 01:25:29 +0200
Subject: nds32: add support for new architecture
Add support for Andes Technology NDS32 architecture.
See here http://www.andestech.com/en/index/index.htm for more
informaton. Verification of the port from an older uClibc
port was done on a sponsored AG101p board.
The testsuite only has 5 errors, three are related to
an existing bug in dlclose() with LT.old, also happening
on cris32 and m68k.
Failures to fallocate/posix_fallocate are unresolved.
Thanks to Andes Technology sponsoring the hardware and
being very helpful while doing the uClibc-ng porting.
Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
---
libc/string/nds32/Makefile | 13 +
libc/string/nds32/memcpy.S | 88 +++++++
libc/string/nds32/memset.S | 66 +++++
libc/sysdeps/linux/nds32/Makefile | 13 +
libc/sysdeps/linux/nds32/Makefile.arch | 5 +
libc/sysdeps/linux/nds32/__longjmp.S | 90 +++++++
libc/sysdeps/linux/nds32/__syscall_error.c | 16 ++
libc/sysdeps/linux/nds32/bits/byteswap.h | 121 +++++++++
libc/sysdeps/linux/nds32/bits/endian.h | 16 ++
libc/sysdeps/linux/nds32/bits/fcntl.h | 241 ++++++++++++++++++
libc/sysdeps/linux/nds32/bits/kernel_stat.h | 57 +++++
libc/sysdeps/linux/nds32/bits/kernel_types.h | 52 ++++
libc/sysdeps/linux/nds32/bits/mathdef.h | 40 +++
libc/sysdeps/linux/nds32/bits/mman.h | 106 ++++++++
libc/sysdeps/linux/nds32/bits/setjmp.h | 42 ++++
libc/sysdeps/linux/nds32/bits/shm.h | 106 ++++++++
libc/sysdeps/linux/nds32/bits/sigcontext.h | 59 +++++
libc/sysdeps/linux/nds32/bits/stackinfo.h | 31 +++
libc/sysdeps/linux/nds32/bits/stat.h | 172 +++++++++++++
libc/sysdeps/linux/nds32/bits/syscalls.h | 103 ++++++++
.../linux/nds32/bits/uClibc_arch_features.h | 37 +++
libc/sysdeps/linux/nds32/bits/uClibc_page.h | 31 +++
libc/sysdeps/linux/nds32/bits/wordsize.h | 23 ++
libc/sysdeps/linux/nds32/brk.c | 67 +++++
libc/sysdeps/linux/nds32/bsd-_setjmp.S | 35 +++
libc/sysdeps/linux/nds32/bsd-setjmp.S | 34 +++
libc/sysdeps/linux/nds32/clone.S | 93 +++++++
libc/sysdeps/linux/nds32/crt1.S | 96 ++++++++
libc/sysdeps/linux/nds32/crti.S | 81 ++++++
libc/sysdeps/linux/nds32/crtn.S | 24 ++
libc/sysdeps/linux/nds32/jmpbuf-offsets.h | 28 +++
libc/sysdeps/linux/nds32/jmpbuf-unwind.h | 12 +
libc/sysdeps/linux/nds32/mmap.S | 101 ++++++++
libc/sysdeps/linux/nds32/setjmp.S | 109 +++++++++
libc/sysdeps/linux/nds32/sigaction.c | 40 +++
libc/sysdeps/linux/nds32/sigrestorer.S | 42 ++++
libc/sysdeps/linux/nds32/sys/elf.h | 13 +
libc/sysdeps/linux/nds32/sys/io.h | 48 ++++
libc/sysdeps/linux/nds32/sys/procfs.h | 127 ++++++++++
libc/sysdeps/linux/nds32/sys/ptrace.h | 133 ++++++++++
libc/sysdeps/linux/nds32/sys/regdef.h | 90 +++++++
libc/sysdeps/linux/nds32/sys/ucontext.h | 112 +++++++++
libc/sysdeps/linux/nds32/sys/user.h | 83 +++++++
libc/sysdeps/linux/nds32/syscall.S | 60 +++++
libc/sysdeps/linux/nds32/sysdep.S | 125 ++++++++++
libc/sysdeps/linux/nds32/sysdep.h | 271 +++++++++++++++++++++
libc/sysdeps/linux/nds32/vfork.S | 87 +++++++
47 files changed, 3439 insertions(+)
create mode 100644 libc/string/nds32/Makefile
create mode 100644 libc/string/nds32/memcpy.S
create mode 100644 libc/string/nds32/memset.S
create mode 100644 libc/sysdeps/linux/nds32/Makefile
create mode 100644 libc/sysdeps/linux/nds32/Makefile.arch
create mode 100644 libc/sysdeps/linux/nds32/__longjmp.S
create mode 100644 libc/sysdeps/linux/nds32/__syscall_error.c
create mode 100644 libc/sysdeps/linux/nds32/bits/byteswap.h
create mode 100644 libc/sysdeps/linux/nds32/bits/endian.h
create mode 100644 libc/sysdeps/linux/nds32/bits/fcntl.h
create mode 100644 libc/sysdeps/linux/nds32/bits/kernel_stat.h
create mode 100644 libc/sysdeps/linux/nds32/bits/kernel_types.h
create mode 100644 libc/sysdeps/linux/nds32/bits/mathdef.h
create mode 100644 libc/sysdeps/linux/nds32/bits/mman.h
create mode 100644 libc/sysdeps/linux/nds32/bits/setjmp.h
create mode 100644 libc/sysdeps/linux/nds32/bits/shm.h
create mode 100644 libc/sysdeps/linux/nds32/bits/sigcontext.h
create mode 100644 libc/sysdeps/linux/nds32/bits/stackinfo.h
create mode 100644 libc/sysdeps/linux/nds32/bits/stat.h
create mode 100644 libc/sysdeps/linux/nds32/bits/syscalls.h
create mode 100644 libc/sysdeps/linux/nds32/bits/uClibc_arch_features.h
create mode 100644 libc/sysdeps/linux/nds32/bits/uClibc_page.h
create mode 100644 libc/sysdeps/linux/nds32/bits/wordsize.h
create mode 100644 libc/sysdeps/linux/nds32/brk.c
create mode 100644 libc/sysdeps/linux/nds32/bsd-_setjmp.S
create mode 100644 libc/sysdeps/linux/nds32/bsd-setjmp.S
create mode 100644 libc/sysdeps/linux/nds32/clone.S
create mode 100644 libc/sysdeps/linux/nds32/crt1.S
create mode 100644 libc/sysdeps/linux/nds32/crti.S
create mode 100644 libc/sysdeps/linux/nds32/crtn.S
create mode 100644 libc/sysdeps/linux/nds32/jmpbuf-offsets.h
create mode 100644 libc/sysdeps/linux/nds32/jmpbuf-unwind.h
create mode 100644 libc/sysdeps/linux/nds32/mmap.S
create mode 100644 libc/sysdeps/linux/nds32/setjmp.S
create mode 100644 libc/sysdeps/linux/nds32/sigaction.c
create mode 100644 libc/sysdeps/linux/nds32/sigrestorer.S
create mode 100644 libc/sysdeps/linux/nds32/sys/elf.h
create mode 100644 libc/sysdeps/linux/nds32/sys/io.h
create mode 100644 libc/sysdeps/linux/nds32/sys/procfs.h
create mode 100644 libc/sysdeps/linux/nds32/sys/ptrace.h
create mode 100644 libc/sysdeps/linux/nds32/sys/regdef.h
create mode 100644 libc/sysdeps/linux/nds32/sys/ucontext.h
create mode 100644 libc/sysdeps/linux/nds32/sys/user.h
create mode 100644 libc/sysdeps/linux/nds32/syscall.S
create mode 100644 libc/sysdeps/linux/nds32/sysdep.S
create mode 100644 libc/sysdeps/linux/nds32/sysdep.h
create mode 100644 libc/sysdeps/linux/nds32/vfork.S
(limited to 'libc')
diff --git a/libc/string/nds32/Makefile b/libc/string/nds32/Makefile
new file mode 100644
index 000000000..0a95346fd
--- /dev/null
+++ b/libc/string/nds32/Makefile
@@ -0,0 +1,13 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+top_srcdir:=../../../
+top_builddir:=../../../
+all: objs
+include $(top_builddir)Rules.mak
+include ../Makefile.in
+include $(top_srcdir)Makerules
diff --git a/libc/string/nds32/memcpy.S b/libc/string/nds32/memcpy.S
new file mode 100644
index 000000000..4f285b5ee
--- /dev/null
+++ b/libc/string/nds32/memcpy.S
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sysdep.h>
+!==========================================================
+! void *memcpy(void *dst, const void *src, int n);
+!
+! dst: $r0
+! src: $r1
+! n : $r2
+! ret: $r0 - pointer to the memory area dst.
+!==========================================================
+.weak memcpy
+ENTRY(memcpy)
+ move $r5, $r0
+ beq $r0, $r1, .Lquit_memcpy
+ beqz $r2, .Lquit_memcpy
+ srli $r3, $r2, #5 ! check if len < cache-line size 32
+ beqz $r3, .Lword_copy_entry
+ andi $r4, $r0, #0x3 ! check byte-align
+ beqz $r4, .Lunalign_word_copy_entry
+
+ addi $r4, $r4, #-4
+ abs $r4, $r4 ! check how many un-align byte to copy
+ sub $r2, $r2, $r4 ! update $R2
+
+.Lunalign_byte_copy:
+ lbi.bi $r3, [$r1], #1
+ addi $r4, $r4, #-1
+ sbi.bi $r3, [$r0], #1
+ bnez $r4, .Lunalign_byte_copy
+ beqz $r2, .Lquit_memcpy
+
+.Lunalign_word_copy_entry:
+ andi $r3, $r0, 0x1f ! check cache-line unaligncount
+ beqz $r3, .Lcache_copy
+
+ addi $r3, $r3, #-32
+ abs $r3, $r3
+ sub $r2, $r2, $r3 ! update $R2
+
+.Lunalign_word_copy:
+ lmw.bim $r4, [$r1], $r4
+ addi $r3, $r3, #-4
+ smw.bim $r4, [$r0], $r4
+ bnez $r3, .Lunalign_word_copy
+ beqz $r2, .Lquit_memcpy
+
+ addi $r3, $r2, #-32 ! to check $r2 < cache_line, than go to .Lword_copy
+ bltz $r3, .Lword_copy_entry
+.Lcache_copy:
+ srli $r3, $r2, #5
+ beqz $r3, .Lword_copy_entry
+ pushm $r6, $r13
+.L3:
+ lmw.bim $r6, [$r1], $r13
+ addi $r3, $r3, #-1
+ smw.bim $r6, [$r0], $r13
+ bnez $r3, .L3
+ popm $r6, $r13
+
+.Lword_copy_entry:
+ andi $r2, $r2, #31
+ beqz $r2, .Lquit_memcpy
+ srli $r3, $r2, #2
+ beqz $r3, .Lbyte_copy
+.Lword_copy:
+ lmw.bim $r4, [$r1], $r4
+ addi $r3, $r3, #-1
+ smw.bim $r4, [$r0], $r4
+ bnez $r3, .Lword_copy
+ andi $r2, $r2, #3
+ beqz $r2, .Lquit_memcpy
+
+.Lbyte_copy:
+ lbi.bi $r3, [$r1], #1
+ addi $r2, $r2, #-1
+ sbi.bi $r3, [$r0], #1
+ bnez $r2, .Lbyte_copy
+
+.Lquit_memcpy:
+ move $r0, $r5
+ ret
+
+END(memcpy)
+libc_hidden_def(memcpy)
diff --git a/libc/string/nds32/memset.S b/libc/string/nds32/memset.S
new file mode 100644
index 000000000..edd15a410
--- /dev/null
+++ b/libc/string/nds32/memset.S
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1998, 2003 Free Software Foundation, Inc.
+ * Contributed by Philip Blundell <philb@gnu.org>
+ *
+ * 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 <features.h>
+#include <sysdep.h>
+!==========================================================
+! void *memset(void *dst, int val, int len);
+!
+! dst: $r0
+! val: $r1
+! len: $r2
+! ret: $r0 - pointer to the memory area dst.
+!==========================================================
+.weak memset
+ENTRY(memset)
+ move $r5, $r0 ! Return value
+ beqz $r2, .Lend_memset ! Exit when len = 0
+ srli $r3, $r2, 2 ! r3 is how many words to copy
+ andi $r2, $r2, 3 ! How many bytes are less than a word
+ beqz $r3, .Lbyte_set ! When n is less than a word
+
+ ! set r1 from to abababab
+ andi $r1, $r1, 0x00ff ! r1 = 000000ab
+ slli $r4, $r1, 8 ! r4 = 0000ab00
+ or $r1, $r1, $r4 ! r1 = 0000abab
+ slli $r4, $r1, 16 ! r4 = abab0000
+ or $r1, $r1, $r4 ! r1 = abababab
+
+.Lword_set:
+ addi $r3, $r3, -1 ! How many words left to copy
+ smw.bim $r1, [$r5], $r1 ! Copy the word to det
+ bnez $r3, .Lword_set ! Still words to set, continue looping
+ beqz $r2, .Lend_memset ! No left byte to set
+
+.Lbyte_set:
+ ! Less than 4 bytes left to set
+ addi $r2, $r2, -1 ! Decrease len by 1
+ sbi.p $r1, [$r5], 1 ! Set data of the next byte to r1
+ bnez $r2, .Lbyte_set ! Still bytes left to set
+
+.Lend_memset:
+ ret
+
+END(memset)
+libc_hidden_def(memset)
diff --git a/libc/sysdeps/linux/nds32/Makefile b/libc/sysdeps/linux/nds32/Makefile
new file mode 100644
index 000000000..633c91f3e
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/Makefile
@@ -0,0 +1,13 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+top_srcdir=../../../../
+top_builddir=../../../../
+all: objs
+include $(top_builddir)Rules.mak
+include Makefile.arch
+include $(top_srcdir)Makerules
diff --git a/libc/sysdeps/linux/nds32/Makefile.arch b/libc/sysdeps/linux/nds32/Makefile.arch
new file mode 100644
index 000000000..8691875ee
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/Makefile.arch
@@ -0,0 +1,5 @@
+# Copyright (C) 2016 Andes Technology, Inc.
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+
+CSRC-y := brk.c sigaction.c
+SSRC-y := setjmp.S __longjmp.S bsd-setjmp.S bsd-_setjmp.S clone.S mmap.S sigrestorer.S vfork.S sysdep.S syscall.S
diff --git a/libc/sysdeps/linux/nds32/__longjmp.S b/libc/sysdeps/linux/nds32/__longjmp.S
new file mode 100644
index 000000000..fbea6f6f4
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/__longjmp.S
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/*
+ setjmp/longjmp for nds32.
+ r0 - r5 are for paramter passing - no need to save
+ r6 - r14 are callee saved - needs to save
+ r15 is temp register for assembler - no need to save
+ r16 - r25 are caller saved - no need to save
+ r26 - r27 are temp registers for OS - no need to save
+ r28 is fp - need to save
+ r29 is gp - need to save
+ r30 is ra - need to save
+ r31 is sp - need to save
+ so we need to save r6 - r14 and r28 - r31
+ The jmpbuf looks like this:
+ r6
+ r7
+ r8
+ r9
+ r10
+ r11
+ r12
+ r13
+ r14
+ fp
+ gp
+ ra
+ sp
+#ifdef NDS32_ABI_2FP_PLUS
+ ($fpcfg.freg)
+ (callee-saved FPU regs)
+#endif
+ reserved(for 8-byte align if needed)
+*/
+
+#include <sysdep.h>
+#define _SETJMP_H
+#define _ASM
+#include <bits/setjmp.h>
+ .section .text
+
+/* __longjmp (env[0].__jmpbuf, val ?: 1); */
+ENTRY(__longjmp)
+ ! restore registers
+ lmw.bim $r6, [$r0], $r14, #0xf
+
+#ifdef NDS32_ABI_2FP_PLUS
+ lwi.bi $r20, [$r0], #4 /* Load $fpcfg.freg to $r20. */
+
+ /* Case switch for $r20 as $fpcfg.freg. */
+ beqz $r20, .LCFG0 /* Branch if $fpcfg.freg = 0b00. */
+ xori $r15, $r20, #0b10
+ beqz $r15, .LCFG2 /* Branch if $fpcfg.freg = 0b10. */
+ srli $r20, $r20, #0b01
+ beqz $r20, .LCFG1 /* Branch if $fpcfg.freg = 0b01. */
+ /* Fall-through if $fpcfg.freg = 0b11. */
+.LCFG3:
+ fldi.bi $fd31, [$r0], #8
+ fldi.bi $fd30, [$r0], #8
+ fldi.bi $fd29, [$r0], #8
+ fldi.bi $fd28, [$r0], #8
+ fldi.bi $fd27, [$r0], #8
+ fldi.bi $fd26, [$r0], #8
+ fldi.bi $fd25, [$r0], #8
+ fldi.bi $fd24, [$r0], #8
+.LCFG2:
+ fldi.bi $fd10, [$r0], #8
+ fldi.bi $fd9, [$r0], #8
+ fldi.bi $fd8, [$r0], #8
+.LCFG1:
+ fldi.bi $fd7, [$r0], #8
+ fldi.bi $fd6, [$r0], #8
+ fldi.bi $fd5, [$r0], #8
+ fldi.bi $fd4, [$r0], #8
+.LCFG0:
+ fldi.bi $fd3, [$r0], #8
+#endif /* NDS32_ABI_2FP_PLUS */
+
+
+ ! return error code; make sure error code is not 0
+ bnez $r1, .Ldone
+ movi $r1, #1
+.Ldone:
+ addi $r0, $r1, #0
+ ret
+END(__longjmp)
+libc_hidden_def(__longjmp)
diff --git a/libc/sysdeps/linux/nds32/__syscall_error.c b/libc/sysdeps/linux/nds32/__syscall_error.c
new file mode 100644
index 000000000..2aa6903e2
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/__syscall_error.c
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <errno.h>
+#include <features.h>
+
+/* This routine is jumped to by all the syscall handlers, to stash
+ * an error number into errno. */
+int __syscall_error(int err_no) attribute_hidden;
+int __syscall_error(int err_no)
+{
+ __set_errno(err_no);
+ return -1;
+}
diff --git a/libc/sysdeps/linux/nds32/bits/byteswap.h b/libc/sysdeps/linux/nds32/bits/byteswap.h
new file mode 100644
index 000000000..0f43cbb4e
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/byteswap.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Macros to swap the order of bytes in integer values.
+ Copyright (C) 1997, 1998, 2000, 2002, 2003, 2006, 2007
+ 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. */
+
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
+#endif
+
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H 1
+
+/* Swap bytes in 16 bit value. */
+#define __bswap_constant_16(x) \
+ ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+
+#ifdef __GNUC__
+# if __GNUC__ >= 2
+# define __bswap_16(x) \
+ (__extension__ \
+ ({ register unsigned short int __v, __x = (x); \
+ if (__builtin_constant_p (__x)) \
+ __v = __bswap_constant_16 (__x); \
+ else \
+ __asm__ ("wsbh %0, %0\n\t" \
+ : "=r" (__v) \
+ : "0" (__x)); \
+ __v; }))
+# else
+/* This is better than nothing. */
+# define __bswap_16(x) \
+ (__extension__ \
+ ({ register unsigned short int __x = (x); __bswap_constant_16 (__x); }))
+# endif
+#else
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return __bswap_constant_16 (__bsx);
+}
+#endif
+
+/* Swap bytes in 32 bit value. */
+#define __bswap_constant_32(x) \
+ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
+ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
+
+#ifdef __GNUC__
+# if __GNUC__ >= 2
+# define __bswap_32(x) \
+ (__extension__ \
+ ({ register unsigned int __v, __x = (x); \
+ if (__builtin_constant_p (__x)) \
+ __v = __bswap_constant_32 (__x); \
+ else \
+ __asm__ ("wsbh %0, %0\n\t" \
+ "rotri %0, %0, #16\n\t" \
+ : "=r" (__v) \
+ : "0" (__x)); \
+ __v; }))
+# else
+# define __bswap_32(x) \
+ (__extension__ \
+ ({ register unsigned int __x = (x); __bswap_constant_32 (__x); }))
+# endif
+#else
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return __bswap_constant_32 (__bsx);
+}
+#endif
+
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* Swap bytes in 64 bit value. */
+#define __bswap_constant_64(x) \
+ ((((x) & 0xff00000000000000ull) >> 56) \
+ | (((x) & 0x00ff000000000000ull) >> 40) \
+ | (((x) & 0x0000ff0000000000ull) >> 24) \
+ | (((x) & 0x000000ff00000000ull) >> 8) \
+ | (((x) & 0x00000000ff000000ull) << 8) \
+ | (((x) & 0x0000000000ff0000ull) << 24) \
+ | (((x) & 0x000000000000ff00ull) << 40) \
+ | (((x) & 0x00000000000000ffull) << 56))
+
+# define __bswap_64(x) \
+ (__extension__ \
+ ({ union { __extension__ unsigned long long int __ll; \
+ unsigned long int __l[2]; } __w, __r; \
+ if (__builtin_constant_p (x)) \
+ __r.__ll = __bswap_constant_64 (x); \
+ else \
+ { \
+ __w.__ll = (x); \
+ __r.__l[0] = __bswap_32 (__w.__l[1]); \
+ __r.__l[1] = __bswap_32 (__w.__l[0]); \
+ } \
+ __r.__ll; }))
+#endif
+
+#endif /* _BITS_BYTESWAP_H */
diff --git a/libc/sysdeps/linux/nds32/bits/endian.h b/libc/sysdeps/linux/nds32/bits/endian.h
new file mode 100644
index 000000000..989d752d4
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/endian.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif /* _ENDIAN_H */
+
+#ifdef __NDS32_EB__
+#define __BYTE_ORDER __BIG_ENDIAN
+#else /* ! __NDS32_EB__ */
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif /* ! __NDS32_EB__ */
+
+#define __FLOAT_WORD_ORDER __BYTE_ORDER
diff --git a/libc/sysdeps/linux/nds32/bits/fcntl.h b/libc/sysdeps/linux/nds32/bits/fcntl.h
new file mode 100644
index 000000000..d21c4e03c
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/fcntl.h
@@ -0,0 +1,241 @@
+/* O_*, F_*, FD_* bit values for Linux.
+ Copyright (C) 1995, 1996, 1997, 1998, 2000, 2004, 2007
+ 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _FCNTL_H
+# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
+#endif
+
+#include <sys/types.h>
+#ifdef __USE_GNU
+# include <bits/uio.h>
+#endif
+
+
+/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
+ located on an ext2 file system */
+#define O_ACCMODE 0003
+#define O_RDONLY 00
+#define O_WRONLY 01
+#define O_RDWR 02
+#define O_CREAT 0100 /* not fcntl */
+#define O_EXCL 0200 /* not fcntl */
+#define O_NOCTTY 0400 /* not fcntl */
+#define O_TRUNC 01000 /* not fcntl */
+#define O_APPEND 02000
+#define O_NONBLOCK 04000
+#define O_NDELAY O_NONBLOCK
+#define O_SYNC 010000
+#define O_FSYNC O_SYNC
+#define O_ASYNC 020000
+
+#ifdef __USE_GNU
+# define O_DIRECT 040000 /* Direct disk access. */
+# define O_DIRECTORY 0200000 /* Must be a directory. */
+# define O_NOFOLLOW 0400000 /* Do not follow links. */
+# define O_NOATIME 01000000 /* Do not set atime. */
+# define O_CLOEXEC 02000000 /* set close_on_exec */
+# define O_PATH 010000000 /* Resolve pathname but do not open file. */
+#endif
+
+/* For now Linux has synchronisity options for data and read operations.
+ We define the symbols here but let them do the same as O_SYNC since
+ this is a superset. */
+#if defined __USE_POSIX199309 || defined __USE_UNIX98
+# define O_DSYNC O_SYNC /* Synchronize data. */
+# define O_RSYNC O_SYNC /* Synchronize read operations. */
+#endif
+
+#ifdef __USE_LARGEFILE64
+# define O_LARGEFILE 0100000
+#endif
+
+/* Values for the second argument to `fcntl'. */
+#define F_DUPFD 0 /* Duplicate file descriptor. */
+#define F_GETFD 1 /* Get file descriptor flags. */
+#define F_SETFD 2 /* Set file descriptor flags. */
+#define F_GETFL 3 /* Get file status flags. */
+#define F_SETFL 4 /* Set file status flags. */
+#ifndef __USE_FILE_OFFSET64
+# define F_GETLK 5 /* Get record locking info. */
+# define F_SETLK 6 /* Set record locking info (non-blocking). */
+# define F_SETLKW 7 /* Set record locking info (blocking). */
+#else
+# define F_GETLK F_GETLK64 /* Get record locking info. */
+# define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
+# define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
+#endif
+#define F_GETLK64 12 /* Get record locking info. */
+#define F_SETLK64 13 /* Set record locking info (non-blocking). */
+#define F_SETLKW64 14 /* Set record locking info (blocking). */
+
+#if defined __USE_BSD || defined __USE_UNIX98
+# define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
+# define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
+#endif
+
+#ifdef __USE_GNU
+# define F_SETSIG 10 /* Set number of signal to be sent. */
+# define F_GETSIG 11 /* Get number of signal to be sent. */
+#endif
+
+#ifdef __USE_GNU
+# define F_SETLEASE 1024 /* Set a lease. */
+# define F_GETLEASE 1025 /* Enquire what lease is active. */
+# define F_NOTIFY 1026 /* Request notfications on a directory. */
+# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
+ close-on-exit set on new fd. */
+# define F_SETPIPE_SZ 1031 /* Set pipe page size array. */
+# define F_GETPIPE_SZ 1032 /* Get pipe page size array. */
+#endif
+
+/* For F_[GET|SET]FD. */
+#define FD_CLOEXEC 1 /* actually anything with low bit set goes */
+
+/* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
+#define F_RDLCK 0 /* Read lock. */
+#define F_WRLCK 1 /* Write lock. */
+#define F_UNLCK 2 /* Remove lock. */
+
+/* For old implementation of bsd flock(). */
+#define F_EXLCK 4 /* or 3 */
+#define F_SHLCK 8 /* or 4 */
+
+#ifdef __USE_BSD
+/* Operations for bsd flock(), also used by the kernel implementation. */
+# define LOCK_SH 1 /* shared lock */
+# define LOCK_EX 2 /* exclusive lock */
+# define LOCK_NB 4 /* or'd with one of the above to prevent
+ blocking */
+# define LOCK_UN 8 /* remove lock */
+#endif
+
+#ifdef __USE_GNU
+# define LOCK_MAND 32 /* This is a mandatory flock: */
+# define LOCK_READ 64 /* ... which allows concurrent read operations. */
+# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
+# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
+#endif
+
+#ifdef __USE_GNU
+/* Types of directory notifications that may be requested with F_NOTIFY. */
+# define DN_ACCESS 0x00000001 /* File accessed. */
+# define DN_MODIFY 0x00000002 /* File modified. */
+# define DN_CREATE 0x00000004 /* File created. */
+# define DN_DELETE 0x00000008 /* File removed. */
+# define DN_RENAME 0x00000010 /* File renamed. */
+# define DN_ATTRIB 0x00000020 /* File changed attibutes. */
+# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
+#endif
+
+struct flock
+ {
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+#ifndef __USE_FILE_OFFSET64
+ __off_t l_start; /* Offset where the lock begins. */
+ __off_t l_len; /* Size of the locked area; zero means until EOF. */
+#else
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+#endif
+ __pid_t l_pid; /* Process holding the lock. */
+ };
+
+#ifdef __USE_LARGEFILE64
+struct flock64
+ {
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+ __pid_t l_pid; /* Process holding the lock. */
+ };
+#endif
+
+/* Define some more compatibility macros to be backward compatible with
+ BSD systems which did not managed to hide these kernel macros. */
+#ifdef __USE_BSD
+# define FAPPEND O_APPEND
+# define FFSYNC O_FSYNC
+# define FASYNC O_ASYNC
+# define FNONBLOCK O_NONBLOCK
+# define FNDELAY O_NDELAY
+#endif /* Use BSD. */
+
+/* Advise to `posix_fadvise'. */
+#ifdef __USE_XOPEN2K
+# define POSIX_FADV_NORMAL 0 /* No further special treatment. */
+# define POSIX_FADV_RANDOM 1 /* Expect random page references. */
+# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
+# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
+# define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
+# define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
+#endif
+
+
+#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
+/* Flags for SYNC_FILE_RANGE. */
+# define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
+ in the range before performing the
+ write. */
+# define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
+ dirty pages in the range which are
+ not presently under writeback. */
+# define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
+ the range after performing the
+ write. */
+
+/* Flags for SPLICE and VMSPLICE. */
+# define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
+# define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
+ (but we may still block on the fd
+ we splice from/to). */
+# define SPLICE_F_MORE 4 /* Expect more data. */
+# define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
+#endif
+
+__BEGIN_DECLS
+
+#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
+
+/* Provide kernel hint to read ahead. */
+extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
+ __THROW;
+
+
+/* Selective file content synch'ing. */
+extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
+ unsigned int __flags);
+
+/* Splice address range into a pipe. */
+extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
+ size_t __count, unsigned int __flags);
+
+/* Splice two files together. */
+extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
+ __off64_t *__offout, size_t __len,
+ unsigned int __flags);
+
+/* In-kernel implementation of tee for pipe buffers. */
+extern ssize_t tee (int __fdin, int __fdout, size_t __len,
+ unsigned int __flags);
+
+#endif
+__END_DECLS
+
diff --git a/libc/sysdeps/linux/nds32/bits/kernel_stat.h b/libc/sysdeps/linux/nds32/bits/kernel_stat.h
new file mode 100644
index 000000000..9e5c40d15
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/kernel_stat.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _BITS_STAT_STRUCT_H
+#define _BITS_STAT_STRUCT_H
+
+struct kernel_stat {
+#if defined(__NDS32_EB__)
+ unsigned short st_dev;
+ unsigned short __pad1;
+#else
+ unsigned long st_dev;
+#endif
+ unsigned long st_ino;
+ unsigned short st_mode;
+ unsigned short st_nlink;
+ unsigned short st_uid;
+ unsigned short st_gid;
+#if defined(__NDS32_EB__)
+ unsigned short st_rdev;
+ unsigned short __pad2;
+#else
+ unsigned long st_rdev;
+#endif
+ unsigned long st_size;
+ unsigned long st_blksize;
+ unsigned long st_blocks;
+ struct timespec st_atim;
+ struct timespec st_mtim;
+ struct timespec st_ctim;
+ unsigned long __unused4;
+ unsigned long __unused5;
+};
+
+struct kernel_stat64 {
+ unsigned long long st_dev;
+ unsigned long __pad0;
+#define STAT64_HAS_BROKEN_ST_INO 1
+ unsigned long __st_ino;
+ unsigned int st_mode;
+ unsigned int st_nlink;
+ unsigned long st_uid;
+ unsigned long st_gid;
+ unsigned long long st_rdev;
+ unsigned int __pad3;
+ unsigned long long st_size;
+ unsigned long st_blksize;
+ unsigned long long st_blocks; // Number 512-byte blocks allocated.
+ struct timespec st_atim; /* Time of last access. */
+ struct timespec st_mtim; /* Time of last modification. */
+ struct timespec st_ctim; /* Time of last status change. */
+ unsigned long long st_ino;
+};
+
+#endif /* _BITS_STAT_STRUCT_H */
diff --git a/libc/sysdeps/linux/nds32/bits/kernel_types.h b/libc/sysdeps/linux/nds32/bits/kernel_types.h
new file mode 100644
index 000000000..1b6ae4d1b
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/kernel_types.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef __ARCH_NDS32_POSIX_TYPES_H
+#define __ARCH_NDS32_POSIX_TYPES_H
+
+/*
+ * This file is generally used by user-level software, so you need to
+ * be a little careful about namespace pollution etc. Also, we cannot
+ * assume GCC is being used.
+ */
+
+typedef unsigned short __kernel_dev_t;
+typedef unsigned long __kernel_ino_t;
+typedef unsigned short __kernel_mode_t;
+typedef unsigned short __kernel_nlink_t;
+typedef long __kernel_off_t;
+typedef int __kernel_pid_t;
+typedef unsigned short __kernel_ipc_pid_t;
+typedef unsigned short __kernel_uid_t;
+typedef unsigned short __kernel_gid_t;
+typedef unsigned int __kernel_size_t;
+typedef int __kernel_ssize_t;
+typedef int __kernel_ptrdiff_t;
+typedef long __kernel_time_t;
+typedef long __kernel_suseconds_t;
+typedef long __kernel_clock_t;
+typedef int __kernel_daddr_t;
+typedef char * __kernel_caddr_t;
+typedef unsigned short __kernel_uid16_t;
+typedef unsigned short __kernel_gid16_t;
+typedef unsigned int __kernel_uid32_t;
+typedef unsigned int __kernel_gid32_t;
+
+typedef unsigned short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+typedef __kernel_dev_t __kernel_old_dev_t;
+typedef long __kernel_long_t;
+typedef unsigned long __kernel_ulong_t;
+__extension__ typedef long long __kernel_loff_t;
+
+typedef struct {
+#ifdef __USE_ALL
+ int val[2];
+#else
+ int __val[2];
+#endif
+} __kernel_fsid_t;
+
+#endif /* __ARCH_NDS32_POSIX_TYPES_H */
diff --git a/libc/sysdeps/linux/nds32/bits/mathdef.h b/libc/sysdeps/linux/nds32/bits/mathdef.h
new file mode 100644
index 000000000..d0bac450b
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/mathdef.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1999, 2000, 2004 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. */
+
+#if !defined _MATH_H && !defined _COMPLEX_H
+# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
+#endif
+
+#if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
+# define _MATH_H_MATHDEF 1
+
+/* GCC does not promote `float' values to `double'. */
+typedef float float_t; /* `float' expressions are evaluated as
+ `float'. */
+typedef double double_t; /* `double' expressions are evaluated as
+ `double'. */
+
+/* The values returned by `ilogb' for 0 and NaN respectively. */
+# define FP_ILOGB0 (-2147483647)
+# define FP_ILOGBNAN (2147483647)
+
+#endif /* ISO C99 */
diff --git a/libc/sysdeps/linux/nds32/bits/mman.h b/libc/sysdeps/linux/nds32/bits/mman.h
new file mode 100644
index 000000000..13f3e60b3
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/mman.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Definitions for POSIX memory map interface. Linux/NDS32 version.
+ Copyright (C) 1997, 2000, 2003, 2004 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. */
+
+#ifndef _SYS_MMAN_H
+# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
+#endif
+
+/* The following definitions basically come from the kernel headers.
+ But the kernel header is not namespace clean. */
+
+
+/* Protections are chosen from these bits, OR'd together. The
+ implementation does not necessarily support PROT_EXEC or PROT_WRITE
+ without PROT_READ. The only guarantees are that no writing will be
+ allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
+
+#define PROT_READ 0x1 /* Page can be read. */
+#define PROT_WRITE 0x2 /* Page can be written. */
+#define PROT_EXEC 0x4 /* Page can be executed. */
+#define PROT_NONE 0x0 /* Page can not be accessed. */
+#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
+ growsdown vma (mprotect only). */
+#define PROT_GROWSUP 0x02000000 /* Extend change to start of
+ growsup vma (mprotect only). */
+
+/* Sharing types (must choose one and only one of these). */
+#define MAP_SHARED 0x01 /* Share changes. */
+#define MAP_PRIVATE 0x02 /* Changes are private. */
+#ifdef __USE_MISC
+# define MAP_TYPE 0x0f /* Mask for type of mapping. */
+#endif
+
+/* Other flags. */
+#define MAP_FIXED 0x10 /* Interpret addr exactly. */
+#ifdef __USE_MISC
+# define MAP_FILE 0x00
+# define MAP_ANONYMOUS 0x20 /* Don't use a file. */
+# define MAP_ANON MAP_ANONYMOUS
+# define MAP_RENAME MAP_ANONYMOUS
+#endif
+
+/* These are Linux-specific. */
+#ifdef __USE_MISC
+# define MAP_GROWSDOWN 0x0100 /* stack-like segment */
+# define MAP_DENYWRITE 0x0800 /* ETXTBSY */
+# define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
+# define MAP_LOCKED 0x2000 /* pages are locked */
+# define MAP_NORESERVE 0x4000 /* don't check for reservations */
+# define MAP_POPULATE 0x08000 /* populate (prefault) pagetables */
+# define MAP_NONBLOCK 0x10000 /* do not block on IO */
+# define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could
+ be uninitialized. */
+#endif
+
+/* Flags to `msync'. */
+#define MS_ASYNC 1 /* Sync memory asynchronously. */
+#define MS_INVALIDATE 2 /* Invalidate the caches. */
+#define MS_SYNC 4 /* Synchronous memory sync. */
+
+/* Flags for `mlockall'. */
+#define MCL_CURRENT 1 /* Lock all currently mapped pages. */
+#define MCL_FUTURE 2 /* Lock all additions to address
+ space. */
+
+/* Advice to `madvise'. */
+#ifdef __USE_BSD
+#define MADV_NORMAL 0 /* default page-in behavior */
+#define MADV_RANDOM 1 /* page-in minimum required */
+#define MADV_SEQUENTIAL 2 /* read-ahead aggressively */
+#define MADV_WILLNEED 3 /* pre-fault pages */
+#define MADV_DONTNEED 4 /* discard these pages */
+#endif
+
+/* The POSIX people had to invent similar names for the same things. */
+#ifdef __USE_XOPEN2K
+# define POSIX_MADV_NORMAL 0 /* No further special treatment. */
+# define POSIX_MADV_RANDOM 1 /* Expect random page references. */
+# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
+# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
+# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
+#endif
+
+/* Flags for `mremap'. */
+#ifdef __USE_GNU
+# define MREMAP_MAYMOVE 1
+#endif
diff --git a/libc/sysdeps/linux/nds32/bits/setjmp.h b/libc/sysdeps/linux/nds32/bits/setjmp.h
new file mode 100644
index 000000000..92d89003a
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/setjmp.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2003, 2004 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Define the machine-dependent type `jmp_buf'. NDS32 version. */
+#ifndef _BITS_SETJMP_H
+#define _BITS_SETJMP_H 1
+
+#ifndef _SETJMP_H
+# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
+#endif
+
+#ifndef _ASM
+typedef struct
+ {
+ /* Callee-saved registers r6 - r14, r16 - r19 and r28 - r31. */
+ int __regs[31];
+
+ /* Program counter. */
+ void * __pc;
+ } __jmp_buf[1];
+#endif
+
+#endif /* bits/setjmp.h */
diff --git a/libc/sysdeps/linux/nds32/bits/shm.h b/libc/sysdeps/linux/nds32/bits/shm.h
new file mode 100644
index 000000000..51e1ece7f
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/shm.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1995,1996,1997,2000,2002,2004 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. */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
+#endif
+
+#include <bits/types.h>
+
+/* Permission flag for shmget. */
+#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
+#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
+
+/* Flags for `shmat'. */
+#define SHM_RDONLY 010000 /* attach read-only else read-write */
+#define SHM_RND 020000 /* round attach address to SHMLBA */
+#define SHM_REMAP 040000 /* take-over region on attach */
+
+/* Commands for `shmctl'. */
+#define SHM_LOCK 11 /* lock segment (root only) */
+#define SHM_UNLOCK 12 /* unlock segment (root only) */
+
+__BEGIN_DECLS
+
+/* Segment low boundary address multiple. */
+#define SHMLBA 0x4000
+extern int __getpagesize (void) __THROW __attribute__ ((__const__));
+
+
+/* Type to count number of attaches. */
+typedef unsigned long int shmatt_t;
+
+/* Data structure describing a set of semaphores. */
+struct shmid_ds
+ {
+ struct ipc_perm shm_perm; /* operation permission struct */
+ size_t shm_segsz; /* size of segment in bytes */
+ __time_t shm_atime; /* time of last shmat() */
+ unsigned long int __unused1;
+ __time_t shm_dtime; /* time of last shmdt() */
+ unsigned long int __unused2;
+ __time_t shm_ctime; /* time of last change by shmctl() */
+ unsigned long int __unused3;
+ __pid_t shm_cpid; /* pid of creator */
+ __pid_t shm_lpid; /* pid of last shmop */
+ shmatt_t shm_nattch; /* number of current attaches */
+ unsigned long int __unused4;
+ unsigned long int __unused5;
+ };
+
+#ifdef __USE_MISC
+
+/* ipcs ctl commands */
+# define SHM_STAT 13
+# define SHM_INFO 14
+
+/* shm_mode upper byte flags */
+# define SHM_DEST 01000 /* segment will be destroyed on last detach */
+# define SHM_LOCKED 02000 /* segment will not be swapped */
+# define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
+
+struct shminfo
+ {
+ unsigned long int shmmax;
+ unsigned long int shmmin;
+ unsigned long int shmmni;
+ unsigned long int shmseg;
+ unsigned long int shmall;
+ unsigned long int __unused1;
+ unsigned long int __unused2;
+ unsigned long int __unused3;
+ unsigned long int __unused4;
+ };
+
+struct shm_info
+ {
+ int used_ids;
+ unsigned long int shm_tot; /* total allocated shm */
+ unsigned long int shm_rss; /* total resident shm */
+ unsigned long int shm_swp; /* total swapped shm */
+ unsigned long int swap_attempts;
+ unsigned long int swap_successes;
+ };
+
+#endif /* __USE_MISC */
+
+__END_DECLS
diff --git a/libc/sysdeps/linux/nds32/bits/sigcontext.h b/libc/sysdeps/linux/nds32/bits/sigcontext.h
new file mode 100644
index 000000000..759b85df1
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/sigcontext.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _BITS_SIGCONTEXT_H
+#define _BITS_SIGCONTEXT_H 1
+
+#ifndef sigcontext_struct
+#define sigcontext_struct sigcontext
+
+struct sigcontext{
+ unsigned long trap_no;
+ unsigned long error_code;
+ unsigned long oldmask;
+ unsigned long nds32_r0;
+ unsigned long nds32_r1;
+ unsigned long nds32_r2;
+ unsigned long nds32_r3;
+ unsigned long nds32_r4;
+ unsigned long nds32_r5;
+ unsigned long nds32_r6;
+ unsigned long nds32_r7;
+ unsigned long nds32_r8;
+ unsigned long nds32_r9;
+ unsigned long nds32_r10;
+ unsigned long nds32_r11;
+ unsigned long nds32_r12;
+ unsigned long nds32_r13;
+ unsigned long nds32_r14;
+ unsigned long nds32_r15;
+ unsigned long nds32_r16;
+ unsigned long nds32_r17;
+ unsigned long nds32_r18;
+ unsigned long nds32_r19;
+ unsigned long nds32_r20;
+ unsigned long nds32_r21;
+ unsigned long nds32_r22;
+ unsigned long nds32_r23;
+ unsigned long nds32_r24;
+ unsigned long nds32_r25;
+ unsigned long nds32_fp; //r28
+ unsigned long nds32_gp; //r29
+ unsigned long nds32_lr; //r30
+ unsigned long nds32_sp; //r31
+ unsigned long nds32_d1lo;
+ unsigned long nds32_d1hi;
+ unsigned long nds32_d0lo;
+ unsigned long nds32_d0hi;
+ unsigned long nds32_ipsw;
+ unsigned long nds32_ipc;
+ unsigned long fault_address;
+};
+
+#define sc_pc nds32_ipc /* For sysdeps/generic/profil-counter.h. */
+
+#endif /* sigcontext_struct */
+
+#endif /* _BITS_SIGCONTEXT_H */
diff --git a/libc/sysdeps/linux/nds32/bits/stackinfo.h b/libc/sysdeps/linux/nds32/bits/stackinfo.h
new file mode 100644
index 000000000..b6f851a28
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/stackinfo.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2001 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. */
+
+/* This file contains a bit of information about the stack allocation
+ of the processor. */
+
+#ifndef _STACKINFO_H
+#define _STACKINFO_H 1
+
+#define _STACK_GROWS_DOWN 1
+
+#endif /* _STACKINFO_H */
diff --git a/libc/sysdeps/linux/nds32/bits/stat.h b/libc/sysdeps/linux/nds32/bits/stat.h
new file mode 100644
index 000000000..fe25292cb
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/stat.h
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1992, 1995-2001, 2002 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. */
+
+#ifndef _SYS_STAT_H
+# error "Never include <bits/stat.h> directly; use <sys/stat.h> instead."
+#endif
+
+/* Versions of the `struct stat' data structure. */
+#define _STAT_VER_LINUX_OLD 1
+#define _STAT_VER_KERNEL 1
+#define _STAT_VER_SVR4 2
+#define _STAT_VER_LINUX 3
+#define _STAT_VER _STAT_VER_LINUX /* The one defined below. */
+
+/* Versions of the `xmknod' interface. */
+#define _MKNOD_VER_LINUX 1
+#define _MKNOD_VER_SVR4 2
+#define _MKNOD_VER _MKNOD_VER_LINUX /* The bits defined below. */
+
+
+struct stat
+ {
+ __dev_t st_dev; /* Device. */
+ unsigned short int __pad1;
+#ifndef __USE_FILE_OFFSET64
+ __ino_t st_ino; /* File serial number. */
+#else
+ __ino_t __st_ino; /* 32bit file serial number. */
+#endif
+ __mode_t st_mode; /* File mode. */
+ __nlink_t st_nlink; /* Link count. */
+ __uid_t st_uid; /* User ID of the file's owner. */
+ __gid_t st_gid; /* Group ID of the file's group.*/
+ __dev_t st_rdev; /* Device number, if device. */
+ unsigned short int __pad2;
+#ifndef __USE_FILE_OFFSET64
+ __off_t st_size; /* Size of file, in bytes. */
+#else
+ __off64_t st_size; /* Size of file, in bytes. */
+#endif
+ __blksize_t st_blksize; /* Optimal block size for I/O. */
+
+#ifndef __USE_FILE_OFFSET64
+ __blkcnt_t st_blocks; /* Number 512-byte blocks allocated. */
+#else
+ __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */
+#endif
+#ifdef __USE_MISC
+ /* Nanosecond resolution timestamps are stored in a format
+ equivalent to 'struct timespec'. This is the type used
+ whenever possible but the Unix namespace rules do not allow the
+ identifier 'timespec' to appear in the <sys/stat.h> header.
+ Therefore we have to handle the use of this header in strictly
+ standard-compliant sources special. */
+ struct timespec st_atim; /* Time of last access. */
+ struct timespec st_mtim; /* Time of last modification. */
+ struct timespec st_ctim; /* Time of last status change. */
+# define st_atime st_atim.tv_sec /* Backward compatibility. */
+# define st_mtime st_mtim.tv_sec
+# define st_ctime st_ctim.tv_sec
+#else
+ __time_t st_atime; /* Time of last access. */
+ unsigned long int st_atimensec; /* Nscecs of last access. */
+ __time_t st_mtime; /* Time of last modification. */
+ unsigned long int st_mtimensec; /* Nsecs of last modification. */
+ __time_t st_ctime; /* Time of last status change. */
+ unsigned long int st_ctimensec; /* Nsecs of last status change. */
+#endif
+#ifndef __USE_FILE_OFFSET64
+ unsigned long int __unused4;
+ unsigned long int __unused5;
+#else
+ __ino64_t st_ino; /* File serial number. */
+#endif
+ };
+
+#ifdef __USE_LARGEFILE64
+struct stat64
+ {
+ __dev_t st_dev; /* Device. */
+ unsigned int __pad1;
+
+ __ino_t __st_ino; /* 32bit file serial number. */
+ __mode_t st_mode; /* File mode. */
+ __nlink_t st_nlink; /* Link count. */
+ __uid_t st_uid; /* User ID of the file's owner. */
+ __gid_t st_gid; /* Group ID of the file's group.*/
+ __dev_t st_rdev; /* Device number, if device. */
+ unsigned int __pad2;
+ __off64_t st_size; /* Size of file, in bytes. */
+ __blksize_t st_blksize; /* Optimal block size for I/O. */
+
+ __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */
+#ifdef __USE_MISC
+ /* Nanosecond resolution timestamps are stored in a format
+ equivalent to 'struct timespec'. This is the type used
+ whenever possible but the Unix namespace rules do not allow the
+ identifier 'timespec' to appear in the <sys/stat.h> header.
+ Therefore we have to handle the use of this header in strictly
+ standard-compliant sources special. */
+ struct timespec st_atim; /* Time of last access. */
+ struct timespec st_mtim; /* Time of last modification. */
+ struct timespec st_ctim; /* Time of last status change. */
+#else
+ __time_t st_atime; /* Time of last access. */
+ unsigned long int st_atimensec; /* Nscecs of last access. */
+ __time_t st_mtime; /* Time of last modification. */
+ unsigned long int st_mtimensec; /* Nsecs of last modification. */
+ __time_t st_ctime; /* Time of last status change. */
+ unsigned long int st_ctimensec; /* Nsecs of last status change. */
+#endif
+ __ino64_t st_ino; /* File serial number. */
+ };
+#endif
+
+/* Tell code we have these members. */
+#define _STATBUF_ST_BLKSIZE
+#define _STATBUF_ST_RDEV
+/* Nanosecond resolution time values are supported. */
+#define _STATBUF_ST_NSEC
+
+/* Encoding of the file mode. */
+
+#define __S_IFMT 0170000 /* These bits determine file type. */
+
+/* File types. */
+#define __S_IFDIR 0040000 /* Directory. */
+#define __S_IFCHR 0020000 /* Character device. */
+#define __S_IFBLK 0060000 /* Block device. */
+#define __S_IFREG 0100000 /* Regular file. */
+#define __S_IFIFO 0010000 /* FIFO. */
+#define __S_IFLNK 0120000 /* Symbolic link. */
+#define __S_IFSOCK 0140000 /* Socket. */
+
+/* POSIX.1b objects. Note that these macros always evaluate to zero. But
+ they do it by enforcing the correct use of the macros. */
+#define __S_TYPEISMQ(buf) ((buf)->st_mode - (buf)->st_mode)
+#define __S_TYPEISSEM(buf) ((buf)->st_mode - (buf)->st_mode)
+#define __S_TYPEISSHM(buf) ((buf)->st_mode - (buf)->st_mode)
+
+/* Protection bits. */
+
+#define __S_ISUID 04000 /* Set user ID on execution. */
+#define __S_ISGID 02000 /* Set group ID on execution. */
+#define __S_ISVTX 01000 /* Save swapped text after use (sticky). */
+#define __S_IREAD 0400 /* Read by owner. */
+#define __S_IWRITE 0200 /* Write by owner. */
+#define __S_IEXEC 0100 /* Execute by owner. */
+
+#ifdef __USE_ATFILE
+# define UTIME_NOW ((1l << 30) - 1l)
+# define UTIME_OMIT ((1l << 30) - 2l)
+#endif
diff --git a/libc/sysdeps/linux/nds32/bits/syscalls.h b/libc/sysdeps/linux/nds32/bits/syscalls.h
new file mode 100644
index 000000000..f69ad4c41
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/syscalls.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+#ifndef __ASSEMBLER__
+#include <errno.h>
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) ((unsigned int) (val) >= 0xfffff001u)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
+#define X(x) #x
+#define Y(x) X(x)
+
+#define __issue_syscall(syscall_name) \
+" syscall " Y(syscall_name) "; \n"
+
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+(__extension__ \
+({ \
+ register long __result __asm__("$r0"); \
+ register long _sys_num __asm__("$r8"); \
+ \
+ LOAD_ARGS_##nr (name, args) \
+ _sys_num = (name); \
+ \
+ __asm__ volatile ( \
+ __issue_syscall (name) \
+ : "=r" (__result) \
+ : "r"(_sys_num) ASM_ARGS_##nr \
+ : "$lp", "memory"); \
+ __result; \
+}) \
+)
+
+/* Macros for setting up inline __asm__ input regs */
+#define ASM_ARGS_0
+#define ASM_ARGS_1 ASM_ARGS_0, "r" (__result)
+#define ASM_ARGS_2 ASM_ARGS_1, "r" (_arg2)
+#define ASM_ARGS_3 ASM_ARGS_2, "r" (_arg3)
+#define ASM_ARGS_4 ASM_ARGS_3, "r" (_arg4)
+#define ASM_ARGS_5 ASM_ARGS_4, "r" (_arg5)
+#define ASM_ARGS_6 ASM_ARGS_5, "r" (_arg6)
+#define ASM_ARGS_7 ASM_ARGS_6, "r" (_arg7)
+
+/* Macros for converting sys-call wrapper args into sys call args */
+#define LOAD_ARGS_0(name, arg) \
+ _sys_num = (long) (name); \
+
+#define LOAD_ARGS_1(name, arg1) \
+ __result = (long) (arg1); \
+ LOAD_ARGS_0 (name, arg1)
+
+/*
+ * Note that the use of _tmpX might look superflous, however it is needed
+ * to ensure that register variables are not clobbered if arg happens to be
+ * a function call itself. e.g. sched_setaffinity() calling getpid() for arg2
+ *
+ * Also this specific order of recursive calling is important to segregate
+ * the tmp args evaluation (function call case described above) and assigment
+ * of register variables
+ */
+#define LOAD_ARGS_2(name, arg1, arg2) \
+ long _tmp2 = (long) (arg2); \
+ LOAD_ARGS_1 (name, arg1) \
+ register long _arg2 __asm__ ("$r1") = _tmp2;
+
+#define LOAD_ARGS_3(name, arg1, arg2, arg3) \
+ long _tmp3 = (long) (arg3); \
+ LOAD_ARGS_2 (name, arg1, arg2) \
+ register long _arg3 __asm__ ("$r2") = _tmp3;
+
+#define LOAD_ARGS_4(name, arg1, arg2, arg3, arg4) \
+ long _tmp4 = (long) (arg4); \
+ LOAD_ARGS_3 (name, arg1, arg2, arg3) \
+ register long _arg4 __asm__ ("$r3") = _tmp4;
+
+#define LOAD_ARGS_5(name, arg1, arg2, arg3, arg4, arg5) \
+ long _tmp5 = (long) (arg5); \
+ LOAD_ARGS_4 (name, arg1, arg2, arg3, arg4) \
+ register long _arg5 __asm__ ("$r4") = _tmp5;
+
+#define LOAD_ARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
+ long _tmp6 = (long) (arg6); \
+ LOAD_ARGS_5 (name, arg1, arg2, arg3, arg4, arg5) \
+ register long _arg6 __asm__ ("$r5") = _tmp6;
+
+#define LOAD_ARGS_7(name, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
+ long _tmp7 = (long) (arg7); \
+ LOAD_ARGS_6 (name, arg1, arg2, arg3, arg4, arg5, arg6) \
+ register long _arg7 __asm__ ("$r6") = _tmp7;
+
+#endif /* ! __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */
diff --git a/libc/sysdeps/linux/nds32/bits/uClibc_arch_features.h b/libc/sysdeps/linux/nds32/bits/uClibc_arch_features.h
new file mode 100644
index 000000000..12e4af9cd
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/uClibc_arch_features.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/*
+ * Track misc arch-specific features that aren't config options
+ */
+
+#ifndef _BITS_UCLIBC_ARCH_FEATURES_H
+#define _BITS_UCLIBC_ARCH_FEATURES_H
+
+/* instruction used when calling abort() to kill yourself */
+#undef __UCLIBC_ABORT_INSTRUCTION__
+
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#define __UCLIBC_SYSCALL_ALIGN_64BIT__
+
+/* does your target have a broken create_module() ? */
+#undef __UCLIBC_BROKEN_CREATE_MODULE__
+
+/* does your target have to worry about older [gs]etrlimit() ? */
+#undef __UCLIBC_HANDLE_OLDER_RLIMIT__
+
+/* does your target have an asm .set ? */
+#define __UCLIBC_HAVE_ASM_SET_DIRECTIVE__
+
+/* define if target supports .weak */
+#define __UCLIBC_HAVE_ASM_WEAK_DIRECTIVE__
+
+/* define if target supports .weakext */
+#undef __UCLIBC_HAVE_ASM_WEAKEXT_DIRECTIVE__
+
+/* define if target supports IEEE signed zero floats */
+#define __UCLIBC_HAVE_SIGNED_ZERO__
+
+#endif /* _BITS_UCLIBC_ARCH_FEATURES_H */
diff --git a/libc/sysdeps/linux/nds32/bits/uClibc_page.h b/libc/sysdeps/linux/nds32/bits/uClibc_page.h
new file mode 100644
index 000000000..0438493db
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/uClibc_page.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _UCLIBC_PAGE_H
+#define _UCLIBC_PAGE_H
+
+/*
+ * Linux/NDS32 supports 4k and 8k pages (build time).
+ *
+ * Although uClibc determines page size dynamically from kernel's auxv
+ * still the generic code needs a fall back
+ * _dl_pagesize = auxvt[AT_PAGESZ].a_un.a_val ? : PAGE_SIZE
+ */
+
+#include <features.h>
+
+#if defined(__CONFIG_NDS32_PAGE_SIZE_8K__)
+#define PAGE_SHIFT 13
+#else
+#define PAGE_SHIFT 12
+#endif
+
+#define PAGE_SIZE (1UL << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+/* TBD: fix this with runtime value for a PAGE_SIZE agnostic uClibc */
+#define MMAP2_PAGE_SHIFT PAGE_SHIFT
+
+#endif /* _UCLIBC_PAGE_H */
diff --git a/libc/sysdeps/linux/nds32/bits/wordsize.h b/libc/sysdeps/linux/nds32/bits/wordsize.h
new file mode 100644
index 000000000..32301a0b8
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bits/wordsize.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1999 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. */
+
+#define __WORDSIZE 32
diff --git a/libc/sysdeps/linux/nds32/brk.c b/libc/sysdeps/linux/nds32/brk.c
new file mode 100644
index 000000000..a3c38d9b8
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/brk.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* brk system call for Linux/NDS32.
+ Copyright (C) 1995, 1996 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 <errno.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/* This must be initialized data because commons can't have aliases. */
+void *__curbrk attribute_hidden = 0;
+
+libc_hidden_proto(brk)
+int
+brk (void *addr)
+{
+ void *newbrk;
+
+#ifdef NDS32_ABI_V0
+ __asm__ __volatile__ ("move $r0, %1 \n\t" // save the argment in r0
+ "pushm $r7, $r8 \n\t"
+ "sethi $r7, hi20(%2)\n\t" // put the syscall number in r7
+ "ori $r7, $r7, lo12(%2)\n\t"
+ "syscall 0x7fff \n\t" // do the system call
+ "popm $r7