Method create_kernel

kernel/kernel/Thread.cpp:162–193

	}

	BAN::ErrorOr<Thread*> Thread::create_kernel(entry_t entry, void* data)
	{
		// Create the thread object
		Thread* thread = new Thread(s_next_tid++, nullptr);
		if (thread == nullptr)
			return BAN::Error::from_errno(ENOMEM);
		BAN::ScopeGuard thread_deleter([thread] { delete thread; });

		// Initialize stack and registers
		thread->m_kernel_stack = TRY(VirtualRange::create_to_vaddr_range(
			PageTable::kernel(),
			{ KERNEL_OFFSET, UINTPTR_MAX },
			kernel_stack_size,
			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
			true
		));

		// Initialize stack for returning
		uintptr_t sp = thread->kernel_stack_top();
		write_to_stack(sp, thread);
		write_to_stack(sp, &Thread::on_exit_trampoline);
		write_to_stack(sp, data);
		write_to_stack(sp, entry);

		thread->m_yield_registers = {};
		thread->m_yield_registers.ip = reinterpret_cast<vaddr_t>(start_kernel_thread);
		thread->m_yield_registers.sp = sp;

		thread_deleter.disable();

		return thread;
	}

	BAN::ErrorOr<Thread*> Thread::create_userspace(Process* process, PageTable& page_table, vaddr_t userspace_stack_vaddr, size_t userspace_stack_size, vaddr_t entry_point, vaddr_t stack_pointer)
	{