xref: /src/tests/compat/linux/arch/x86_64/h_syscall.c

/*	$NetBSD: h_syscall.c,v 1.1 2023/08/19 22:56:44 christos Exp $	*/

/*-
 * Copyright (c) 2023 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Theodore Preduta.
 *
 * 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 <sys/cdefs.h>
__RCSID("$NetBSD: h_syscall.c,v 1.1 2023/08/19 22:56:44 christos Exp $");
#include "h_linux.h"

long
syscall6(long number, register_t arg1, register_t arg2, register_t arg3,
    register_t arg4, register_t arg5, register_t arg6, ...)
{
	long retval;
	register register_t r10 __asm__ ("r10") = arg4;
	register register_t r8 __asm__ ("r8") = arg5;
	register register_t r9 __asm__ ("r9") = arg6;

	__asm__ __volatile__ ("syscall"
	    : "=a"(retval)
	    : "a"(number), "D"(arg1), "S"(arg2), "d"(arg3), "r"(r10), "r"(r8), "r"(r9)
	    : "rcx", "r11", "memory");

	if (retval < 0) {
		errno = -retval;
		return -1;
	}

	return retval;
}