/*
 * \brief  Kernel backend for execution contexts in userland
 * \author Adrian-Ken Rueegsegger
 * \author Reto Buerki
 * \date   2015-02-09
 */

/*
 * Copyright (C) 2015 Genode Labs GmbH
 *
 * This file is part of the Genode OS framework, which is distributed
 * under the terms of the GNU General Public License version 2.
 */

/* core includes */
#include <kernel/thread.h>

using namespace Kernel;

Thread::Thread(unsigned const priority, unsigned const quota,
               char const * const label)
:
	Thread_base(this), Cpu_job(priority, quota), _state(AWAITS_START), _pd(0),
	_utcb_phys(0), _signal_receiver(0), _label(label) {}


void Thread::exception(unsigned const cpu)
{
	if (trapno == PAGE_FAULT) {
		_mmu_exception();
		return;
	} else if (trapno == NO_MATH_COPROC) {
		if (_cpu->retry_fpu_instr(&_lazy_state)) { return; }
		PWRN("fpu error");
		_stop();
		return;
	}
	if (trapno == SUPERVISOR_CALL) {
		_call();
		return;
	} else if (trapno >= INTERRUPTS_START && trapno <= INTERRUPTS_END) {
		_interrupt(cpu);
		return;
	} else {
		PWRN("unknown exception 0x%lx", trapno);
		_stop();
		return;
	}
}