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Kernel: Shutdown on panic in self-test mode

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Instead of doing a reset via triple-fault, let's just shutdown the QEMU
virtual machine because this is already a QEMU-specific handling code
for Self-Test CI mode.
This commit is contained in:
Liav A 2021-07-26 21:34:43 +03:00 • committed by Ali Mohammad Pur
parent de9ff0af50
commit 713b18b7a6
1 changed files with 9 additions and 8 deletions
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17
Kernel/Panic.cpp
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@ -7,19 +7,20 @@
#include <AK/Format.h>
#include <Kernel/Arch/x86/Processor.h>
#include <Kernel/CommandLine.h>
#include <Kernel/IO.h>
#include <Kernel/KSyms.h>
#include <Kernel/Panic.h>
namespace Kernel {
[[noreturn]] static void __reset()
[[noreturn]] static void __shutdown()
{
// FIXME: This works for i686/x86_64, but needs to be ported to any other arch when needed.
asm(
"lidt 0\n"
"movl $0, 0\n");
__builtin_unreachable();
// 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(const char* file, unsigned int line, const char* function)
@ -27,7 +28,7 @@ void __panic(const char* file, unsigned int line, const char* function)
critical_dmesgln("at {}:{} in {}", file, line, function);
dump_backtrace();
if (kernel_command_line().boot_mode() == BootMode::SelfTest)
__reset();
__shutdown();
else
Processor::halt();
}