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Kernel: Let PageDirectory own the associated RangeAllocator.

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Since we transition to a new PageDirectory on exec(), we need a matching
RangeAllocator to go with the new directory. Instead of juggling this in
Process and MemoryManager, simply attach the RangeAllocator to the
PageDirectory instead.

Fixes #61.
This commit is contained in:
Andreas Kling 2019-05-20 04:46:29 +02:00
parent d65114afd7
commit bcc6ddfb6b
6 changed files with 16 additions and 16 deletions
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6
Kernel/VM/PageDirectory.h
View file

@ -1,6 +1,7 @@
#pragma once
#include <Kernel/VM/PhysicalPage.h>
#include <Kernel/VM/RangeAllocator.h>
#include <AK/HashMap.h>
#include <AK/Retainable.h>
#include <AK/RetainPtr.h>
@ -8,7 +9,7 @@
class PageDirectory : public Retainable<PageDirectory> {
friend class MemoryManager;
public:
static Retained<PageDirectory> create() { return adopt(*new PageDirectory); }
static Retained<PageDirectory> create_for_userspace() { return adopt(*new PageDirectory); }
static Retained<PageDirectory> create_at_fixed_address(PhysicalAddress paddr) { return adopt(*new PageDirectory(paddr)); }
~PageDirectory();
@ -17,10 +18,13 @@ public:
void flush(LinearAddress);
RangeAllocator& range_allocator() { return m_range_allocator; }
private:
PageDirectory();
explicit PageDirectory(PhysicalAddress);
RangeAllocator m_range_allocator;
RetainPtr<PhysicalPage> m_directory_page;
HashMap<unsigned, RetainPtr<PhysicalPage>> m_physical_pages;
};