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48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Format.h>
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#include <Kernel/Arch/Processor.h>
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#include <Kernel/Arch/x86/IO.h>
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#include <Kernel/CommandLine.h>
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#include <Kernel/KSyms.h>
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#include <Kernel/Panic.h>
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#include <Kernel/Thread.h>
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namespace Kernel {
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[[noreturn]] static void __shutdown()
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{
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// Note: This will invoke QEMU Shutdown, but for other platforms (or emulators),
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// this has no effect on the system, so we still need to halt afterwards.
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// We also try the Bochs/Old QEMU shutdown method, if the first didn't work.
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IO::out16(0x604, 0x2000);
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IO::out16(0xb004, 0x2000);
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Processor::halt();
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}
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void __panic(char const* file, unsigned int line, char const* function)
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{
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// Avoid lock ranking checks on crashing paths, just try to get some debugging messages out.
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auto* thread = Thread::current();
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if (thread)
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thread->set_crashing();
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critical_dmesgln("at {}:{} in {}", file, line, function);
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dump_backtrace(PrintToScreen::Yes);
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if (!CommandLine::was_initialized())
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Processor::halt();
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switch (kernel_command_line().panic_mode()) {
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case PanicMode::Shutdown:
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__shutdown();
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case PanicMode::Halt:
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[[fallthrough]];
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default:
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Processor::halt();
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}
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}
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}
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