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Support basic mmap'ing of a file!

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All right, we can now mmap() a file and it gets magically paged in from fs
in response to an NP page fault. This is really cool :^)

I need to refactor this to support sharing of read-only file-backed pages,
but it's cool to just have something working.
This commit is contained in:
Andreas Kling 2018-11-08 12:59:16 +01:00
parent fdbd9f1e27
commit 3c8064a787
8 changed files with 141 additions and 14 deletions
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1
Kernel/Process.h
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@ -252,6 +252,7 @@ private:
TTY* m_tty { nullptr };
Region* allocate_region(LinearAddress, size_t, String&& name, bool is_readable = true, bool is_writable = true);
Region* allocate_file_backed_region(LinearAddress laddr, size_t size, RetainPtr<VirtualFileSystem::Node>&& vnode, String&& name, bool is_readable, bool is_writable);
bool deallocate_region(Region& region);
Region* regionFromRange(LinearAddress, size_t);