ardix/arch/at91sam3x8e/entry.c

/* SPDX-License-Identifier: GPL-3.0-or-later */
/* See the end of this file for copyright, license, and warranty information. */

#include <arch/entry.h>
#include <arch/hardware.h>

#include <ardix/syscall.h>
#include <ardix/types.h>

#include <errno.h>
#include <stddef.h>

void arch_enter(void *sp)
{
	struct reg_snapshot *regs = sp;
	enum syscall sc_num = arch_syscall_num(regs);
	int (*handler)(sysarg_t arg1, sysarg_t arg2, sysarg_t arg3,
		       sysarg_t arg4, sysarg_t arg5, sysarg_t arg6);
	int sc_ret;

	if (sc_num > NSYSCALLS) {
		arch_syscall_set_rval(regs, -ENOSYS);
		return;
	}

	handler = sys_table[sc_num];
	if (handler == NULL) {
		arch_syscall_set_rval(regs, -ENOSYS);
		return;
	}

	/* TODO: not every syscall uses the max amount of parameters (duh) */
	sc_ret = handler(arch_syscall_arg1(regs), arch_syscall_arg2(regs), arch_syscall_arg3(regs),
			 arch_syscall_arg4(regs), arch_syscall_arg5(regs), arch_syscall_arg6(regs));

	arch_syscall_set_rval(regs, sc_ret);
}

/*
 * This file is part of Ardix.
 * Copyright (c) 2020, 2021 Felix Kopp <owo@fef.moe>.
 *
 * Ardix is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Ardix is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */