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9201a06027
Before we start disabling acquisition of the big process lock for specific syscalls, make sure to document and assert that all the lock is held during all syscalls.
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018-2020, 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 <Kernel/ACPI/Parser.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/IO.h>
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#include <Kernel/Process.h>
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#include <Kernel/TTY/ConsoleManagement.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$reboot()
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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if (!is_superuser())
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return EPERM;
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REQUIRE_NO_PROMISES;
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dbgln("acquiring FS locks...");
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FileSystem::lock_all();
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dbgln("syncing mounted filesystems...");
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FileSystem::sync();
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dbgln("attempting reboot via ACPI");
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if (ACPI::is_enabled())
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ACPI::Parser::the()->try_acpi_reboot();
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dbgln("attempting reboot via KB Controller...");
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IO::out8(0x64, 0xFE);
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return 0;
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}
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KResultOr<FlatPtr> Process::sys$halt()
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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if (!is_superuser())
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return EPERM;
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REQUIRE_NO_PROMISES;
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ConsoleManagement::the().switch_to_debug();
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dbgln("acquiring FS locks...");
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FileSystem::lock_all();
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dbgln("syncing mounted filesystems...");
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FileSystem::sync();
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dbgln("attempting system shutdown...");
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// QEMU Shutdown
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IO::out16(0x604, 0x2000);
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// If we're here, the shutdown failed. Try VirtualBox shutdown.
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IO::out16(0x4004, 0x3400);
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// VirtualBox shutdown failed. Try Bochs/Old QEMU shutdown.
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IO::out16(0xb004, 0x2000);
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dbgln("shutdown attempts failed, applications will stop responding.");
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dmesgln("Shutdown can't be completed. It's safe to turn off the computer!");
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Processor::halt();
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}
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}
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