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Kernel: Implement basic support for sys$mmap() with MAP_PRIVATE
You can now mmap a file as private and writable, and the changes you make will only be visible to you. This works because internally a MAP_PRIVATE region is backed by a unique PrivateInodeVMObject instead of using the globally shared SharedInodeVMObject like we always did before. :^) Fixes #1045.
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11 changed files with 45 additions and 31 deletions
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@ -41,7 +41,7 @@ public:
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MBVGADevice(PhysicalAddress addr, int pitch, int width, int height);
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virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override;
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virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t, int prot) override;
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virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t, int prot, bool shared) override;
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private:
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virtual const char* class_name() const override { return "MBVGA"; }
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