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82b0171812
We need to assert if interrupts are not disabled when changing the interrupt number of an interrupt handler. Before this fix, any change like this would lead to a crash, because we are using InterruptDisabler in IRQHandler::change_irq_number.
70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Assertions.h>
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#include <Kernel/Interrupts/GenericInterruptHandler.h>
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#include <Kernel/Interrupts/InterruptManagement.h>
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#include <Kernel/Interrupts/PIC.h>
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namespace Kernel {
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GenericInterruptHandler& GenericInterruptHandler::from(u8 interrupt_number)
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{
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return get_interrupt_handler(interrupt_number);
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}
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GenericInterruptHandler::GenericInterruptHandler(u8 interrupt_number, bool disable_remap)
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: m_interrupt_number(interrupt_number),
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m_disable_remap(disable_remap)
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{
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if (m_disable_remap)
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register_generic_interrupt_handler(m_interrupt_number, *this);
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else
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register_generic_interrupt_handler(InterruptManagement::acquire_mapped_interrupt_number(m_interrupt_number), *this);
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}
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GenericInterruptHandler::~GenericInterruptHandler()
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{
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if (m_disable_remap)
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unregister_generic_interrupt_handler(m_interrupt_number, *this);
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else
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unregister_generic_interrupt_handler(InterruptManagement::acquire_mapped_interrupt_number(m_interrupt_number), *this);
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}
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void GenericInterruptHandler::change_interrupt_number(u8 number)
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{
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ASSERT_INTERRUPTS_DISABLED();
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ASSERT(!m_disable_remap);
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unregister_generic_interrupt_handler(InterruptManagement::acquire_mapped_interrupt_number(interrupt_number()), *this);
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m_interrupt_number = number;
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register_generic_interrupt_handler(InterruptManagement::acquire_mapped_interrupt_number(interrupt_number()), *this);
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}
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void GenericInterruptHandler::increment_invoking_counter()
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{
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m_invoking_count++;
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}
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}
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