static void cpuns_exception(unsigned int n, istate_t *istate)
{
if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)
scheduler_fpu_lazy_request();
else {
fault_if_from_uspace(istate,
"Unhandled Coprocessor Unusable Exception.");
panic_badtrap(istate, n,
"Unhandled Coprocessor Unusable Exception.");
}
}
/** General Protection Fault.
*
*/
static void gp_fault(unsigned int n, istate_t *istate)
{
if (TASK) {
irq_spinlock_lock(&TASK->lock, false);
size_t ver = TASK->arch.iomapver;
irq_spinlock_unlock(&TASK->lock, false);
if (CPU->arch.iomapver_copy != ver) {
/*
* This fault can be caused by an early access
* to I/O port because of an out-dated
* I/O Permission bitmap installed on CPU.
* Install the fresh copy and restart
* the instruction.
*/
io_perm_bitmap_install();
return;
}
fault_if_from_uspace(istate, "General protection fault.");
}
panic_badtrap(istate, n, "General protection fault.");
}
static void unhandled_exception(unsigned int n, istate_t *istate)
{
fault_if_from_uspace(istate, "Unhandled exception %s.", exctable[n]);
panic_badtrap(istate, n, "Unhandled exception %s.", exctable[n]);
}
static void ss_fault(unsigned int n, istate_t *istate)
{
fault_if_from_uspace(istate, "Stack fault.");
panic_badtrap(istate, n, "Stack fault.");
}
static void de_fault(unsigned int n, istate_t *istate)
{
fault_if_from_uspace(istate, "Divide error.");
panic_badtrap(istate, n, "Divide error.");
}
static void null_interrupt(unsigned int n, istate_t *istate)
{
fault_if_from_uspace(istate, "Unserviced interrupt: %u.", n);
panic_badtrap(istate, n, "Unserviced interrupt.");
}
