Pete Popov writes:

Hi Erik,

I'm not sure why the NIOS support is not in uClibc -- perhaps the patch
was rejected or never submitted? In any case, I'm playing with some NIOS
stuff and created this patch against 0.9.26. The work was done by
Microtronix. I'm not sure who else contributed to it. It would be great
to have the NIOS support available in uClibc so developers don't have to
go searching for these bits.

Pete

29 files changed, 2418 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/nios/Makefile b/libc/sysdeps/linux/nios/Makefile
new file mode 100644
index 000000000..ea56738dc
--- /dev/null
+++ b/libc/sysdeps/linux/nios/Makefile
@@ -0,0 +1,86 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2003 Erik Andersen <andersen@uclibc.org>
+#
+# This program 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.
+#
+# This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+TOPDIR=../../../../
+include $(TOPDIR)Rules.mak
+ASFLAGS=$(CFLAGS)
+
+CRT0_SRC = crt0.S
+CRT0_OBJ = crt0.o crt1.o
+CTOR_TARGETS=
+
+SSRC= __longjmp.S bsd-_setjmp.S bsd-setjmp.S setjmp.S clone.S vfork.S
+SOBJS=$(patsubst %.S,%.o, $(SSRC))
+
+CSRC= brk.c crtbegin.c crtend.c
+COBJS=$(patsubst %.c,%.o, $(CSRC))
+
+OBJS=$(SOBJS) $(MOBJ) $(COBJS)
+
+all: $(OBJS) $(LIBC)
+
+$(LIBC): ar-target 
+
+ar-target: $(OBJS) $(CRT0_OBJ) $(CTOR_TARGETS)
+	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
+	cp $(CRT0_OBJ) $(TOPDIR)lib/
+
+$(CRT0_OBJ): $(CRT0_SRC)
+	$(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
+$(SOBJS): %.o : %.S
+	$(CC) $(CFLAGS) -c $< -o $@
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
+$(COBJS): %.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
+ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
+crti.o: crti.S
+	$(CC) $(CFLAGS) -c crti.S -o crti.o
+
+$(TOPDIR)lib/crti.o: crti.o
+	$(INSTALL) -d $(TOPDIR)lib/
+	cp crti.o $(TOPDIR)lib/
+
+crtn.o: crtn.S
+	$(CC) $(CFLAGS) -c crtn.S -o crtn.o
+
+$(TOPDIR)lib/crtn.o: crtn.o
+	$(INSTALL) -d $(TOPDIR)lib/
+	cp crtn.o $(TOPDIR)lib/
+else
+$(TOPDIR)lib/crti.o:
+	$(INSTALL) -d $(TOPDIR)lib/
+	$(AR) $(ARFLAGS) $(TOPDIR)lib/crti.o
+$(TOPDIR)lib/crtn.o:
+	$(INSTALL) -d $(TOPDIR)lib/
+	$(AR) $(ARFLAGS) $(TOPDIR)lib/crtn.o
+endif
+
+
+headers:
+	$(LN) -fs ../libc/sysdeps/linux/nios/fpu_control.h $(TOPDIR)/include/
+
+clean:
+	$(RM) *.[oa] *~ core
+	$(RM) bits/sysnum.h
+	$(RM) $(TOPDIR)/include/fpu_control.h
+	
diff --git a/libc/sysdeps/linux/nios/NM_Macros.S b/libc/sysdeps/linux/nios/NM_Macros.S
new file mode 100644
index 000000000..da6136593
--- /dev/null
+++ b/libc/sysdeps/linux/nios/NM_Macros.S
@@ -0,0 +1,473 @@
+
+;------------------------------
+; Macros I: Faux Instructions
+;
+; The following "faux instructions" are
+; implemented here as macros:
+;
+; MOVIP register,constant		MOVI with optional PFX & MOVHI, or BGEN
+; ADDIP register,constant		PFX and ADDI with optional PFX
+; SUBIP register,constant		PFX and SUBI with optional PFX
+; CMPIP register,constant		PFX and CMPI with optional PFX
+;
+; MOVI16 register,constant		PFX and MOVI
+; MOVI32 register,constant		PFX, MOVI, PFX, and MOVHI
+; MOVIA  register,constant		PFX and MOVHI on Nios32, and PFX and MOVI
+;
+; ANDIP register,constant		PFX and ANDI
+; ANDNIP register,constant		PFX and ANDN
+; ORIP register,constant		PFX and ORI
+; XORIP register,constant		PFX and XORI
+;
+; _BSR address						MOVIP address to %g7, and CALL
+; _BR address						MOVIP address to %g7, and JMP
+;
+; BEQ address						SKPS cc_nz and BR, has delay slot
+; BNE address						SKPS cc_z and BR, has delay slot
+; BLE address						SKPS cc_gt and BR, has delay slot
+; BLT address						SKPS cc_ge and BR, has delay slot
+; RESTRET							RESTORE and JMP %i7 
+;
+;-------------------------------
+; Macros II: Printing
+;
+; These macros are guaranteed *not*
+; to have branch delay slot after them.
+;
+; NM_PrintChar char
+; NM_Print "string"
+; NM_PrintLn "string"			Follows it with a carriage return
+; NM_PrintRegister reg			For debugging, prints register name & value
+;
+;-------------------------------
+; Macros III: Inline Debugging
+;
+; These macros print various information
+; using large sections of expanded inline code.
+; They each use either few or no registers.
+; Thus, they may be safely used in interrupt handlers.
+;
+; NM_D_TxChar char			print char to UART, affects no registers
+; NM_D_TxRegister char,char,register	prints the two characters, and the hex register value
+
+; --------------------------------------
+
+
+		.macro	_pfx_op	OP,reg,val,pForce=0
+		.if		(\pForce) || ((\val) > (31)) || ((\val) < (0))
+		PFX		%hi(\val)
+		.endif
+		\OP		\reg,%lo(\val)
+		.endm
+
+		.macro	_bgen reg,val,bit
+		.if ((\val)==(1<<\bit))
+		BGEN	\reg,\bit
+		.equ	_bgenBit,1
+		.endif
+		.endm
+
+	;------------------------
+	; MOVIP %reg,32-bit-value
+		.macro	MOVIP reg,val
+		; Methodically test every BGEN possibility...
+		.equ	_bgenBit,0
+.if 1
+		_bgen \reg,\val,0
+		_bgen \reg,\val,1
+		_bgen \reg,\val,2
+		_bgen \reg,\val,3
+		_bgen \reg,\val,4
+		_bgen \reg,\val,5
+		_bgen \reg,\val,6
+		_bgen \reg,\val,7
+		_bgen \reg,\val,8
+		_bgen \reg,\val,9
+		_bgen \reg,\val,10
+		_bgen \reg,\val,11
+		_bgen \reg,\val,12
+		_bgen \reg,\val,13
+		_bgen \reg,\val,14
+		_bgen \reg,\val,15
+		_bgen \reg,\val,16
+		_bgen \reg,\val,17
+		_bgen \reg,\val,18
+		_bgen \reg,\val,19
+		_bgen \reg,\val,20
+		_bgen \reg,\val,21
+		_bgen \reg,\val,22
+		_bgen \reg,\val,23
+		_bgen \reg,\val,24
+		_bgen \reg,\val,25
+		_bgen \reg,\val,26
+		_bgen \reg,\val,27
+		_bgen \reg,\val,28
+		_bgen \reg,\val,29
+		_bgen \reg,\val,30
+		_bgen \reg,\val,31
+
+		; If no bgen fit...
+.endif
+		.if !_bgenBit
+			.if ((\val) & 0xFFE0)
+				PFX %hi(\val)
+			.endif
+			MOVI \reg,%lo(\val)
+			.if __nios32__
+				.if ((\val) & 0xffff0000)
+					.if ((\val) & 0xFFE00000)
+						PFX %xhi(\val)
+					.endif
+					MOVHI \reg,%xlo(\val)
+				.endif
+			.endif
+		.endif
+
+		.endm
+
+	; ADDIP %reg,16-bit-value
+		.macro	ADDIP reg,val
+		_pfx_op	ADDI,\reg,\val
+		.endm
+
+	; SUBIP %reg,16-bit-value
+		.macro	SUBIP reg,val
+		_pfx_op	SUBI,\reg,\val
+		.endm
+
+	; CMPIP %reg,16-bit-value
+		.macro	CMPIP reg,val
+		_pfx_op	CMPI,\reg,\val
+		.endm
+
+	; ANDIP %reg,16-bit-value
+		.macro	ANDIP reg,val
+		PFX		%hi(\val)
+		AND		\reg,%lo(\val)
+		.endm
+
+	; ANDNIP %reg,16-bit-value
+		.macro	ANDNIP reg,val
+		PFX		%hi(\val)
+		ANDN		\reg,%lo(\val)
+		.endm
+
+	; ORIP %reg,16-bit-value
+		.macro	ORIP reg,val
+		PFX		%hi(\val)
+		OR			\reg,%lo(\val)
+		.endm
+
+	; XORIP %reg,16-bit-value
+		.macro	XORIP reg,val
+		PFX		%hi(\val)
+		XOR		\reg,%lo(\val)
+		.endm
+
+	; BEQ addr
+		.macro	BEQ addr
+		IFS		cc_eq
+		BR			\addr
+		.endm
+
+	; BNE addr
+		.macro	BNE addr
+		IFS		cc_ne
+		BR			\addr
+		.endm
+
+	; BLE addr
+		.macro	BLE addr
+		SKPS		cc_gt
+		BR			\addr
+		.endm
+
+	; BLT addr
+		.macro	BLT addr
+		SKPS		cc_ge
+		BR			\addr
+		.endm
+
+		.macro	digitToChar reg
+		ANDIP	\reg,0x000f
+		CMPI	\reg,10
+		SKPS	cc_lt
+		ADDI	\reg,'A'-'0'-10
+		PFX		%hi('0')
+		ADDI	\reg,%lo('0')
+		.endm
+
+; PUSHRET == dec sp, and stash return addr
+	.macro	PUSHRET
+	SUBI		%sp,2
+	ST			[%sp],%o7
+	.endm
+; POPRET == pop and jump
+	.macro	POPRET
+	LD			%o7,[%sp]
+	JMP		%o7
+	ADDI		%sp,2		; branch delay slot
+	.endm
+
+; RESTRET = restore & return
+	.macro	RESTRET
+	JMP		%i7
+	RESTORE
+	.endm
+
+	;--------------------
+	; MOVI16 %reg,Address
+	;
+	.macro	MOVI16	reg,val
+	PFX	%hi(\val)
+	MOVI	\reg,%lo(\val)
+	.endm
+
+	;--------------------
+	; MOVI32 %reg,Address
+	;
+	.macro	MOVI32	reg,val
+	PFX	%hi(\val)
+	MOVI	\reg,%lo(\val)
+	PFX	%xhi(\val)
+	MOVHI	\reg,%xlo(\val)
+	.endm
+
+	;--------------------
+	; MOVIA %reg,Address
+	;
+	.macro	MOVIA		reg,val
+	.if __nios32__
+		MOVI32 \reg,\val
+	.else
+		MOVI16 \reg,\val
+	.endif
+	.endm
+
+	;--------------------
+	; _BR
+
+	.macro _BR target,viaRegister=%g7
+	MOVIA	\viaRegister,\target@h
+	JMP	\viaRegister
+	.endm
+
+	;--------------------
+	; _BSR
+
+	.macro _BSR target,viaRegister=%g7
+	MOVIA	\viaRegister,\target@h
+	CALL	\viaRegister
+	.endm
+
+	;---------------------
+	; NM_Print "Your String Here"
+	;
+	.macro	NM_Print	string
+
+	BR		pastStringData\@
+	NOP
+
+stringData\@:
+	.asciz	"\string"
+	.align 1		; aligns by 2^n
+pastStringData\@:
+	MOVIA		%o0,stringData\@
+	_BSR		NR_TxString
+	NOP
+	.endm
+
+	.macro	NM_PrintLn string
+	NM_Print	"\string"
+	_BSR		NR_TxCR
+	NOP
+	.endm
+
+	.macro	NM_PrintRegister reg	; affects %g0 & %g1 & %g7, but thrashes the CWP a bit
+	SAVE		%sp,-16
+	NM_Print	"\reg = "
+	RESTORE
+	MOV		%g0,\reg
+	SAVE		%sp,-16
+	MOV		%o0,%g0
+	_BSR		NR_TxHex
+	NOP
+	_BSR		NR_TxCR
+	NOP
+	RESTORE
+	.endm
+
+	.macro	NM_PrintChar char
+	MOVIP		%o0,\char
+	_BSR		NR_TxChar
+	NOP
+	.endm
+
+	.macro	NM_Print2Chars char1,char2
+	MOVIP		%o0,(\char2<<8)+\char1
+	_BSR		NR_TxChar
+	NOP
+	_BSR		NR_TxChar
+	LSRI		%o0,8
+	.endm
+
+
+
+; ---------------------------
+; Completely inline UART sends
+; Send the char, or %g7 if not there.
+; Trashes %g5 and %g6 and %g7...
+
+	.macro	NM_TxChar char=0
+;NM_D_Delay 1000
+	MOVIA	%g6,NA_UARTBase
+txCharLoop\@:
+	PFX	2
+.if \char
+	LD	%g7,[%g6]
+	SKP1	%g7,6
+.else
+	LD	%g5,[%g6]
+	SKP1	%g5,6
+.endif
+	BR	txCharLoop\@
+	NOP
+.if \char
+	MOVIP	%g7,\char
+.endif
+	PFX	1
+	ST	[%g6],%g7
+;NM_D_Delay 4
+	.endm
+
+		.macro NM_TxCR
+		NM_TxChar 13
+		NM_TxChar 10
+		.endm
+
+		.macro NM_TxHexDigit,reg,shift
+		MOV		%g7,\reg
+		LSRI		%g7,\shift
+		ANDIP		%g7,0x000f
+		CMPI		%g7,10
+		SKPS		cc_lt
+		ADDIP		%g7,'A'-'0'-10
+		ADDIP		%g7,'0'
+		NM_TxChar
+		.endm
+
+		.macro NM_TxHex
+
+	.if __nios32__
+		NM_TxHexDigit %g0,28
+		NM_TxHexDigit %g0,24
+		NM_TxHexDigit %g0,20
+		NM_TxHexDigit %g0,16
+	.endif
+
+		NM_TxHexDigit %g0,12
+		NM_TxHexDigit %g0,8
+		NM_TxHexDigit %g0,4
+		NM_TxHexDigit %g0,0
+		.endm
+
+
+
+
+
+
+
+
+
+
+; ----------------------
+; The following macros are
+; rather mighty. They expand
+; to large inline code for
+; printing various things to
+; the serial port. They are
+; useful for debugging
+; trap handlers, where you
+; can't just go and call
+; NR_TxChar and such, because,
+; well, the CWP might be
+; off limits!
+;
+; They do, however, presume
+; that the stack is in good
+; working order.
+
+
+.macro NM_D_PushGRegisters
+ 	SUBIP %sp,16+69				; oddball number so if we accidentally see it, it looks funny.
+	STS	[%sp,16+0],%g0
+	STS	[%sp,16+1],%g1
+	STS	[%sp,16+2],%g2
+	STS	[%sp,16+3],%g3
+	STS	[%sp,16+4],%g4
+	STS	[%sp,16+5],%g5
+	STS	[%sp,16+6],%g6
+	STS	[%sp,16+7],%g7
+	.endm
+
+.macro NM_D_PopGRegisters
+	LDS	%g0,[%sp,16+0]
+	LDS	%g1,[%sp,16+1]
+	LDS	%g2,[%sp,16+2]
+	LDS	%g3,[%sp,16+3]
+	LDS	%g4,[%sp,16+4]
+	LDS	%g5,[%sp,16+5]
+	LDS	%g6,[%sp,16+6]
+	LDS	%g7,[%sp,16+7]
+	ADDIP	%sp,16+69				; must match the push
+	.endm
+
+
+.macro NM_D_TxChar	c
+	SUBI	%sp,16+8		; 32 or 16 bit, that's enough space
+	STS	[%sp,16+0],%g6
+	STS	[%sp,16+0],%g7
+	NM_TxChar \c
+	LDS	%g6,[%sp,16+0]
+	LDS	%g7,[%sp,16+1]
+	ADDI	%sp,16+8
+	.endm
+
+.macro NM_D_TxChar3 c1,c2,c3
+ NM_D_TxChar '<'
+ NM_D_TxChar \c1
+ NM_D_TxChar \c2
+ NM_D_TxChar \c3
+ NM_D_TxChar '>'
+.endm
+
+.macro NM_D_TxRegister r,n,reg
+ NM_D_PushGRegisters
+ NM_TxChar '('
+ NM_TxChar \r
+ NM_TxChar \n
+ NM_TxChar ':'
+ MOV		%g0,\reg
+ NM_TxHex
+ NM_TxChar ')'
+ NM_D_PopGRegisters
+.endm
+
+.macro NM_D_TxReg r,n,reg
+	NM_D_TxRegister \r,\n,\reg
+.endm
+
+; Do a delay loop, affects no registers.
+
+.macro NM_D_Delay d
+	SUBI	%sp,16+4
+	STS	[%sp,16+0],%g0
+	MOVIP	%g0,\d
+NM_D_DelayLoop\@:
+	IFRnz	%g0
+	 BR	NM_D_DelayLoop\@
+	SUBI	%g0,1
+	LDS	%g0,[%sp,16+0]
+	ADDI	%sp,16+4
+.endm
+
diff --git a/libc/sysdeps/linux/nios/NR_Math1.S b/libc/sysdeps/linux/nios/NR_Math1.S
new file mode 100644
index 000000000..5d5169ba8
--- /dev/null
+++ b/libc/sysdeps/linux/nios/NR_Math1.S
@@ -0,0 +1,63 @@
+
+
+	.include "NM_Macros.S"
+
+	.file	"okmul.c"
+gcc2_compiled.:
+	.text
+	.p2align 1
+	.globl __mulsi3
+	.type	 __mulsi3,@function
+__mulsi3:
+
+	;SKP0	%o0,31
+	;NEG	%o1
+	;ABS	%o0
+
+		.MACRO ZSTEP bit
+		SKP0	%o0,\bit
+		ADD	%g0,%o1
+		LSLI	%o1,1
+		.ENDM
+
+	MOVI	%g0,0
+	ZSTEP	0
+	ZSTEP	1
+	ZSTEP	2
+	ZSTEP	3
+	ZSTEP	4
+	ZSTEP	5
+	ZSTEP	6
+	ZSTEP	7
+	ZSTEP	8
+	ZSTEP	9
+	ZSTEP	10
+	ZSTEP	11
+	ZSTEP	12
+	ZSTEP	13
+	ZSTEP	14
+	ZSTEP	15
+	ZSTEP	16
+	ZSTEP	17
+	ZSTEP	18
+	ZSTEP	19
+	ZSTEP	20
+	ZSTEP	21
+	ZSTEP	22
+	ZSTEP	23
+	ZSTEP	24
+	ZSTEP	25
+	ZSTEP	26
+	ZSTEP	27
+	ZSTEP	28
+	ZSTEP	29
+	ZSTEP	30
+	ZSTEP	31
+	; No bit 31: we already set %o0 to positive
+
+	JMP	%o7
+	MOV	%o0,%g0
+
+.Lfe1:
+	.size	 __mulsi3,.Lfe1-__mulsi3
+
diff --git a/libc/sysdeps/linux/nios/__longjmp.S b/libc/sysdeps/linux/nios/__longjmp.S
new file mode 100644
index 000000000..c2b1979cc
--- /dev/null
+++ b/libc/sysdeps/linux/nios/__longjmp.S
@@ -0,0 +1,108 @@
+/* Copyright (C) 1997, 1998 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 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 _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+
+;----------------------------------------
+;         Name: __longjmp
+;  Description: Restore the current context
+;               as saved by a previous nr_setjmp
+;        Input: %o0: jmp_buf (ptr to) array to restore context from
+;               %o1: integer to return
+;       Output: %o0 = 0 the first time we're called, or
+;               whatever longjmp returns later
+; Side Effects: uses %g0, %g1 & %g2
+;    CWP Depth: 0
+;
+
+	.align 2
+	.global	__longjmp
+__longjmp:
+	;
+	; The way we'll do this is by executing
+	; RESTORE instructions until the old
+	; return address matches. Then we'll
+	; jump to where setjmp was called from.
+	;
+	; Since we're moving the window pointer
+	; all over the place, we'll naturally
+	; only use the %g registers.
+	;
+
+	mov	%g0,%o0		; %g0 -> jmp_buf
+	mov	%g1,%o1		; %g1 = return value
+	pfx	jmpbuf_callersret
+	ld	%g2,[%g0]	; %g2 = old return address
+__longjmp_loop:
+	cmp	%g2,%i7		; Are we there yet?
+	skps	cc_ne
+	 br	__longjmp_done
+	 nop			; (delay slot)
+
+	br	__longjmp_loop
+	restore			; (delay slot)
+	;
+	; One might put in a watchdog counter here, to
+	; prevent a runaway stack crawl... but what would that
+	; accomplish? What error can we throw? To whom?
+	;
+
+__longjmp_done:
+	pfx	jmpbuf_l0	; Restore local register l0
+	ld	%l0,[%g0]
+	pfx	jmpbuf_l1	; Restore local register l1
+	ld	%l1,[%g0]
+	pfx	jmpbuf_l2	; Restore local register l2
+	ld	%l2,[%g0]
+	pfx	jmpbuf_l3	; Restore local register l3
+	ld	%l3,[%g0]
+	pfx	jmpbuf_l4	; Restore local register l4
+	ld	%l4,[%g0]
+	pfx	jmpbuf_l5	; Restore local register l5
+	ld	%l5,[%g0]
+	pfx	jmpbuf_l6	; Restore local register l6
+	ld	%l6,[%g0]
+	pfx	jmpbuf_l7	; Restore local register l7
+	ld	%l7,[%g0]
+	pfx	jmpbuf_i0	; Restore input register i0
+	ld	%i0,[%g0]
+	pfx	jmpbuf_i1	; Restore input register i1
+	ld	%i1,[%g0]
+	pfx	jmpbuf_i2	; Restore input register i2
+	ld	%i2,[%g0]
+	pfx	jmpbuf_i3	; Restore input register i3
+	ld	%i3,[%g0]
+	pfx	jmpbuf_i4	; Restore input register i4
+	ld	%i4,[%g0]
+	pfx	jmpbuf_i5	; Restore input register i5
+	ld	%i5,[%g0]
+	pfx	jmpbuf_jmpret
+	ld	%o7,[%g0]	; set fake return address
+	jmp	%o7		; and kinda return there.
+	mov	%o0,%g1		; (delay slot) return value
+
+
+
+
+
+
+
+
diff --git a/libc/sysdeps/linux/nios/bits/endian.h b/libc/sysdeps/linux/nios/bits/endian.h
new file mode 100644
index 000000000..252597931
--- /dev/null
+++ b/libc/sysdeps/linux/nios/bits/endian.h
@@ -0,0 +1,8 @@
+/* nios is little-endian.  */
+
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
+//mle
+#define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/libc/sysdeps/linux/nios/bits/fcntl.h b/libc/sysdeps/linux/nios/bits/fcntl.h
new file mode 100644
index 000000000..e2974b9f7
--- /dev/null
+++ b/libc/sysdeps/linux/nios/bits/fcntl.h
@@ -0,0 +1,180 @@
+/* O_*, F_*, FD_* bit values for Linux.
+   Copyright (C) 1995, 1996, 1997, 1998 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 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.  */
+
+#ifndef	_FCNTL_H
+# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
+#endif
+
+
+#include <sys/types.h>
+
+/* 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_DIRECTORY	 040000	/* Must be a directory.	 */
+# define O_NOFOLLOW	0100000	/* Do not follow links.	 */
+# define O_DIRECT	0200000	/* Direct disk access.	*/
+# define O_STREAMING	04000000/* streaming access */
+#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	0400000
+#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_XOPEN2K
+# 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.	 */
+#endif
+
+/* For F_[GET|SET]FL.  */
+#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
diff --git a/libc/sysdeps/linux/nios/bits/kernel_types.h b/libc/sysdeps/linux/nios/bits/kernel_types.h
new file mode 100644
index 000000000..acbb0c592
--- /dev/null
+++ b/libc/sysdeps/linux/nios/bits/kernel_types.h
@@ -0,0 +1,43 @@
+/* Note that we use the exact same include guard #define names
+ * as asm/posix_types.h.  This will avoid gratuitous conflicts 
+ * with the posix_types.h kernel header, and will ensure that 
+ * our private content, and not the kernel header, will win.
+ *