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The new Rom_session::update function can be used to request the update of an existing ROM dataspace. If the new data fits into the existing dataspace, a subsequent call of 'dataspace' can be omitted. This way, ROM dataspace updates don't suffer from page-fault-handling costs that would occur when replacing the dataspace with each update.
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.