75 lines
1.3 KiB
C++
75 lines
1.3 KiB
C++
/*
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* \brief Kernel backend for execution contexts in userland
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* \author Sebastian Sumpf
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* \date 2015-06-02
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*/
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/*
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* Copyright (C) 2015-2016 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* core includes */
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#include <kernel/pd.h>
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#include <kernel/thread.h>
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using namespace Kernel;
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void Kernel::Thread::_init() { }
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void Thread::exception(unsigned const cpu)
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{
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if (is_irq())
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return;
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switch(cpu_exception) {
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case ECALL_FROM_USER:
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_call();
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ip += 4; /* set to next instruction */
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break;
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case INSTRUCTION_PAGE_FAULT:
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case STORE_PAGE_FAULT:
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case LOAD_PAGE_FAULT:
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_mmu_exception();
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break;
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default:
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PWRN("%s -> %s: unhandled exception %lu at ip=%lx",
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pd_label(), label(), cpu_exception, ip);
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_stop();
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}
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}
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void Thread::_mmu_exception()
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{
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_become_inactive(AWAITS_RESUME);
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_fault_pd = (addr_t)_pd->platform_pd();
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_fault_signal = (addr_t)_fault.signal_context();
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_fault_addr = Cpu::sbadaddr();
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_fault.submit();
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}
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void Thread::_call_update_pd()
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{
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Cpu::sfence();
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}
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void Thread::_call_update_data_region()
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{
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Cpu::sfence();
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}
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void Thread::_call_update_instr_region() { }
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void Thread_event::_signal_acknowledged()
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{
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_thread->_resume();
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}
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