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Open Menu /lib/libc/arch/or1k/SYS.h 
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/*	$NetBSD: SYS.h,v 1.2 2014/09/05 18:09:37 matt Exp $	*/

/*-
 * Copyright (c) 2014 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <machine/asm.h>
#include <sys/syscall.h>
#include "sysassym.h"

#define	_DOSYSCALL(x)		l.addi	r13,r0,(SYS_ ## x)	;\
				l.sys	0			;\
				l.nop

#define	_SYSCALL_NOERROR(x,y)	ENTRY(x)			;\
				.if NSYSARGS_##y > 6		;\
				l.lwz	r11, 0(r1)		;\
				.endif				;\
				.if NSYSARGS_##y > 7		;\
				l.lwz	r12, 4(r1)		;\
				.endif				;\
				_DOSYSCALL(y)

#define _SYSCALL(x,y)		_SYSCALL_NOERROR(x,y)		;\
				l.bf	_C_LABEL(__cerror)	;\
				l.nop

#define SYSCALL_NOERROR(x)	_SYSCALL_NOERROR(x,x)

#define SYSCALL(x)		_SYSCALL(x,x)

#define PSEUDO_NOERROR(x,y)	_SYSCALL_NOERROR(x,y)		;\
				l.jr	lr			;\
				l.nop				;\
				END(x)

#define PSEUDO(x,y)		_SYSCALL_NOERROR(x,y)		;\
				l.bf	_C_LABEL(__cerror)	;\
				l.nop				;\
				l.jr	lr			;\
				l.nop				;\
				END(x)

#define RSYSCALL_NOERROR(x)	PSEUDO_NOERROR(x,x)

#define RSYSCALL(x)		PSEUDO(x,x)

#define	WSYSCALL(weak,strong)	WEAK_ALIAS(weak,strong)		;\
				PSEUDO(strong,weak)