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The "schedule_post_signal_hook" method of the Genode::Entrypoint class is problematic because the signal hook can be scheduled and replaced multiple times during the signal dispatch cycle. Add an alternative to this method with "register_io_progress_handler" and the "Post_signal_ hook" class with "Io_progress_handler". The difference being an "Io_progress_handler" may be registered once during the lifetime of an entrypoint to prevent arbitrary libraries from replacing a pending hook. The "register_io_progress_handler" remains as a deprecated API, and is now invoked for every I/O signal received and only for I/O signals rather than for any signal. Ref #3132 |
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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. _Core_ may export information about the hardware platform by an ROM called 'platform_info'. Depending on the platform, e.g. ARM or x86 or riscv, and depending on the boot mode and boot loader and kernel, some nodes may not be populated. !<platform_info> ! <acpi revision="2" rsdt="0x1fe93074" xsdt="0x1fe930e8"/> ! <boot> ! <framebuffer phys="0x7300000" width="1024" height="768" bpp="32"/> ! </boot> !</platform_info> If the ACPI RSDT and XSDT physical pointer is reported by the used kernel and/or bootloader, _Core_ may provide this information by the ROM. If the graphic device is initialised and can be directly used by a framebuffer driver, _Core_ may provide the physical pointer to the framebuffer, the resolution and color depth in bits.