/*	$OpenBSD: SYS.h,v 1.5 2020/02/18 12:19:11 kettenis Exp $ */

/*
 * Copyright (c) 2016 Dale Rahn
 *
 * 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 AUTHOR ``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 AUTHOR 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>

#define SYSTRAP(x)					\
	ldr	x8, =SYS_ ## x				;\
	svc	0					;\
	dsb	nsh					;\
	isb

#define DL_SYSCALL(n)					\
	.global		__CONCAT(_dl_,n)		;\
	.type		__CONCAT(_dl_,n)%function	;\
__CONCAT(_dl_,n):					;\
	RETGUARD_SETUP(__CONCAT(_dl_,n), x15)		;\
	SYSTRAP(n)					;\
	cneg	x0, x0, cs	/* r0 = -errno */	;\
	RETGUARD_CHECK(__CONCAT(_dl_,n), x15)	 	;\
	ret