Method allocate_stack

kernel/kernel/Processor.cpp:160–172

NOTE: I don't like this being a separate function but we need heap and page tables for this :)

	// NOTE: I don't like this being a separate function but we need heap and page tables for this :)
	void Processor::allocate_stack()
	{
		ASSERT(m_stack_paddr == 0);
		ASSERT(m_stack_vaddr == 0);

		m_stack_paddr = Heap::get().take_free_page();
		ASSERT(m_stack_paddr);

		m_stack_vaddr = PageTable::kernel().reserve_free_page(KERNEL_OFFSET);
		ASSERT(m_stack_vaddr);

		PageTable::kernel().map_page_at(m_stack_paddr, m_stack_vaddr, PageTable::ReadWrite | PageTable::Present);
	}

	void Processor::initialize_smp()
	{