linker: Create sections from zephyr,memory-region nodes #43603
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Currently when a node has a 'zephyr,memory-region' compatible and a 'zephyr,memory-region' string property, a new memory region is created in the linker script. Having a memory region without a section to place variables in could be not that useful. With this patch we extend the memory-region mechanism to also create sections. The user can then place variables in the sections as usual by using for example the GCC attributes. Signed-off-by: Carlo Caione <[email protected]>
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In #42008 we introduced the
zephyr,memory-regioncompatible that can be used in the DT to automate the creation of memory regions in the linker script. When a node has azephyr,memory-regioncompatible and azephyr,memory-regionstring property, a new memory region is created in the linker script.Having a memory region without a section to place variables in, could be not that useful. With this patch we extend the memory-region mechanism to also create sections (more specifically we create one section for each memory region).
The user can then place variables in the sections as usual by using for example the GCC attributes.
This will be particularly useful when also #43119 will be merged so that for example we can place buffers and variables in non-cacheable memory regions / sections very easily and in a general way backed by DT.