xref: /src/lib/libc/arch/aarch64/SYS.h

/* $NetBSD: SYS.h,v 1.1 2014/08/10 05:47:36 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>

#ifndef __STDC__
#error __STDC__ not defined
#endif

#define SYSTRAP(x)	svc #(SYS_ ## x)

#define _SYSCALL_NOERROR(x,y)						\
	ENTRY(x);							\
	SYSTRAP(y)

#define _INVOKE_CERROR()						\
	b.cs	_C_LABEL(__cerror)

#define _SYSCALL(x, y)							\
	_SYSCALL_NOERROR(x,y);						\
	_INVOKE_CERROR()

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

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

#define PSEUDO_NOERROR(x,y)						\
	_SYSCALL_NOERROR(x,y);						\
	ret;								\
	END(x)

#define PSEUDO(x,y)							\
	_SYSCALL(x,y);							\
	ret;								\
	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)

	.hidden	__cerror
	.globl	__cerror