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On seL4, we need to convert untyped memory to page frames before being able to use it as normal memory. There already exists the hook function '_export_ds' that is principally suitable for such tasks. It is currently solely used on Linux where we have to create a file for each dataspace. To make the hook useful also for seL4, we need to call _export_ds prior _clear_ds. Otherwise, we would try to clear memory that is still untyped.
This is generic part of the Genode implementation. It consists of two parts: :_Core_: is the ultimate root of the Genode application tree and provides abstractions for the lowest-level hardware resources such as RAM, ROM, CPU, and generic device access. All generic parts of Core can be found here - for system-specific implementations refer to the appropriate 'base-<system>' directory. :_Base libraries and protocols_: that are used by each Genode component to interact with other components. This is the glue that holds everything together.