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/*

 * Copyright (c) 2005 Martin Decky

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - 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.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * 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.

 */

/** @addtogroup generic

 * @{

 */

/**

 * @file

 * @brief   Syscall table and syscall wrappers.

 */

#include <syscall/syscall.h>

#include <proc/thread.h>

#include <proc/task.h>

#include <proc/program.h>

#include <mm/as.h>

#include <print.h>

#include <putchar.h>

#include <errno.h>

#include <arch.h>

#include <debug.h>

#include <ipc/sysipc.h>

#include <synch/futex.h>

#include <synch/smc.h>

#include <ddi/ddi.h>

#include <security/cap.h>

#include <syscall/copy.h>

#include <sysinfo/sysinfo.h>

#include <console/console.h>

#include <udebug/udebug.h>

/** Print using kernel facility

 *

 * Print to kernel log.

 *

 */

static unative_t sys_klog(int fd, const void * buf, size_t count)

{

    size_t i;

    char *data;

    int rc;

    if (count > PAGE_SIZE)

        return ELIMIT;

    if (count > 0) {

        data = (char *) malloc(count, 0);

        if (!data)

            return ENOMEM;

        rc = copy_from_uspace(data, buf, count);

        if (rc) {

            free(data);

            return rc;

        }

        for (i = 0; i < count; i++)

            putchar(data[i]);

        free(data);

    } else

        klog_update();

    return count;

}

/** Tell kernel to get keyboard/console access again */

static unative_t sys_debug_enable_console(void)

{

#ifdef CONFIG_KCONSOLE

    arch_grab_console();

    return true;

#else

    return false;

#endif

}

/** Dispatch system call */

unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,

    unative_t a4, unative_t a5, unative_t a6, unative_t id)

{

    unative_t rc;

#ifdef CONFIG_UDEBUG

    udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);

#endif

    if (id < SYSCALL_END) {

        rc = syscall_table[id](a1, a2, a3, a4, a5, a6);

    } else {

        printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);

        task_kill(TASK->taskid);

        thread_exit();

    }

    if (THREAD->interrupted)

        thread_exit();

#ifdef CONFIG_UDEBUG

    udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);

    /*

     * Stopping point needed for tasks that only invoke non-blocking

     * system calls.

     */

    udebug_stoppable_begin();

    udebug_stoppable_end();

#endif  

    return rc;

}

syshandler_t syscall_table[SYSCALL_END] = {

    (syshandler_t) sys_klog,

    (syshandler_t) sys_tls_set,

    /* Thread and task related syscalls. */

    (syshandler_t) sys_thread_create,

    (syshandler_t) sys_thread_exit,

    (syshandler_t) sys_thread_get_id,

    (syshandler_t) sys_task_get_id,

    (syshandler_t) sys_program_spawn_loader,

    /* Synchronization related syscalls. */

    (syshandler_t) sys_futex_sleep_timeout,

    (syshandler_t) sys_futex_wakeup,

    (syshandler_t) sys_smc_coherence,

    /* Address space related syscalls. */

    (syshandler_t) sys_as_area_create,

    (syshandler_t) sys_as_area_resize,

    (syshandler_t) sys_as_area_change_flags,

    (syshandler_t) sys_as_area_destroy,

    /* IPC related syscalls. */

    (syshandler_t) sys_ipc_call_sync_fast,

    (syshandler_t) sys_ipc_call_sync_slow,

    (syshandler_t) sys_ipc_call_async_fast,

    (syshandler_t) sys_ipc_call_async_slow,

    (syshandler_t) sys_ipc_answer_fast,

    (syshandler_t) sys_ipc_answer_slow,

    (syshandler_t) sys_ipc_forward_fast,

    (syshandler_t) sys_ipc_wait_for_call,

    (syshandler_t) sys_ipc_hangup,

    (syshandler_t) sys_ipc_register_irq,

    (syshandler_t) sys_ipc_unregister_irq,

    /* Capabilities related syscalls. */

    (syshandler_t) sys_cap_grant,

    (syshandler_t) sys_cap_revoke,

    /* DDI related syscalls. */

    (syshandler_t) sys_physmem_map,

    (syshandler_t) sys_iospace_enable,

    (syshandler_t) sys_preempt_control,

    /* Sysinfo syscalls */

    (syshandler_t) sys_sysinfo_valid,

    (syshandler_t) sys_sysinfo_value,

    /* Debug calls */

    (syshandler_t) sys_debug_enable_console,

    (syshandler_t) sys_ipc_connect_kbox

};

/** @}

 */