static void ser_dump_vfs()
{
/* Notify VFS it has to generate stack traces. Kernel can't do that as
* it's not aware of user space threads.
*/
mini_notify(proc_addr(KERNEL), VFS_PROC_NR);
}
/*===========================================================================*
* generic_handler *
*===========================================================================*/
static int generic_handler(irq_hook_t * hook)
{
/* This function handles hardware interrupt in a simple and generic way. All
* interrupts are transformed into messages to a driver. The IRQ line will be
* reenabled if the policy says so.
*/
int proc_nr;
/* As a side-effect, the interrupt handler gathers random information by
* timestamping the interrupt events. This is used for /dev/random.
*/
get_randomness(&krandom, hook->irq);
/* Check if the handler is still alive.
* If it's dead, this should never happen, as processes that die
* automatically get their interrupt hooks unhooked.
*/
if(!isokendpt(hook->proc_nr_e, &proc_nr))
panic("invalid interrupt handler: %d", hook->proc_nr_e);
/* Add a bit for this interrupt to the process' pending interrupts. When
* sending the notification message, this bit map will be magically set
* as an argument.
*/
priv(proc_addr(proc_nr))->s_int_pending |= (1 << hook->notify_id);
/* Build notification message and return. */
mini_notify(proc_addr(HARDWARE), hook->proc_nr_e);
return(hook->policy & IRQ_REENABLE);
}
/*===========================================================================*
* cause_alarm *
*===========================================================================*/
static void cause_alarm(timer_t *tp)
{
/* Routine called if a timer goes off and the process requested a synchronous
* alarm. The process number is stored in timer argument 'ta_int'. Notify that
* process with a notification message from CLOCK.
*/
endpoint_t proc_nr_e = tmr_arg(tp)->ta_int; /* get process number */
mini_notify(proc_addr(CLOCK), proc_nr_e); /* notify process */
}
