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32d9534c67
Because registering and unregistering interrupt handlers triggers calls to virtual functions, we can't do this in the constructor and destructor. Fixes #5539
92 lines
3.6 KiB
C++
92 lines
3.6 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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// NOTE: We cannot register or unregister the handler while the object
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// is being constructed or deconstructed!
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}
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void GenericInterruptHandler::will_be_destroyed()
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{
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// This will be called for RefCounted interrupt handlers before the
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// object is being destroyed. As soon as the destructor is invoked
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// it is no longer advisable to unregister the handler (which causes
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// calls to virtual functions), so let's do this right before
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// invoking it
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unregister_interrupt_handler();
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}
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void GenericInterruptHandler::register_interrupt_handler()
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{
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if (m_registered)
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return;
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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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m_registered = true;
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}
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void GenericInterruptHandler::unregister_interrupt_handler()
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{
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if (!m_registered)
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return;
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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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m_registered = false;
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}
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void GenericInterruptHandler::change_interrupt_number(u8 number)
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{
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VERIFY_INTERRUPTS_DISABLED();
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VERIFY(!m_disable_remap);
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if (m_registered) {
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unregister_generic_interrupt_handler(InterruptManagement::acquire_mapped_interrupt_number(interrupt_number()), *this);
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m_registered = false;
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}
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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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}
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