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3c5d27506f
This patch restricts 'Region_map::attach_executable' to create read-only mappings, while offering the option to map the full rights using a new 'attach_rwx' method. The 'attach_rwx' method is now used by the dynamic linker to explicitly attach the linker area with full rwx rights. With the old page-fault handling code, the execute flag was evaluated only for leaf dataspaces, not for managed dataspaces while traversing region-map hierarchies. With the new page-fault handling code, the execute bit is downgraded to no-execute when passing a managed dataspace that is not attached as executable. Issue #4920 |
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| README | ||
This is the generic Genode base system, which consists of two parts: :_Core_: is the root of the Genode component tree. It provides abstractions for the lowest-level hardware resources such as RAM, ROM, CPU, and device access. All generic parts of core can be found here. For kernel-specific parts, refer to the appropriate 'base-<kernel>' directory. :_Base libraries and interfaces: that are used by each Genode component to interact with other components. This is the glue that holds everything together. Depending on the used kernel, core may export information about the hardware platform as a ROM called 'platform_info'. For example, if the ACPI RSDT and XSDT physical pointer are reported by the used kernel and/or bootloader, core provides this information in the ROM as follows. !<platform_info> ! <acpi revision="2" rsdt="0x1fe93074" xsdt="0x1fe930e8"/> ! <boot> ! <framebuffer phys="0x7300000" width="1024" height="768" bpp="32"/> ! </boot> !</platform_info> If the graphics device is initialised and can be directly used by a framebuffer driver, core provides the physical pointer to the framebuffer, the resolution, and color depth in bits.