syscall.c

/* SPDX-License-Identifier: BSD-3-Clause */
/*
 * Authors: Simon Kuenzer <simon.kuenzer@neclab.eu>
 *
 * Copyright (c) 2020, NEC Europe Ltd., NEC Corporation. All rights reserved.
 *
 * 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.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <uk/config.h>
#if CONFIG_LIBSYSCALL_SHIM
#include <stdarg.h>
#include <uk/syscall.h>

long syscall(long num, ...)
{
	va_list va;
	long arg[6];

	va_start(va, num);
	arg[0] = va_arg(va, long);
	arg[1] = va_arg(va, long);
	arg[2] = va_arg(va, long);
	arg[3] = va_arg(va, long);
	arg[4] = va_arg(va, long);
	arg[5] = va_arg(va, long);
	va_end(va);

	return uk_syscall(num,
			  arg[0],
			  arg[1],
			  arg[2],
			  arg[3],
			  arg[4],
			  arg[5]);
}

#else
#include <errno.h>
#include <uk/print.h>
#include <uk/essentials.h>

long syscall(long num __maybe_unused, ...)
{
	uk_pr_err("No such system call %lu\n", num);
	return -ENOSYS;
}
#endif /* CONFIG_LIBSYSCALL_SHIM */