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