arc: Set tp regno to 26 for Zephyr #17
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@abrodkin @evgeniy-paltsev @claziss does this sound ok? |
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@stephanosio From compiler point of view, you can choose any callee saved register (i.e. |
Zephyr needs a consistent thread pointer register which is respected by all code, not just the OS. Use register 26 to be compatible with existing Zephyr source. Signed-off-by: Keith Packard <[email protected]>
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@stephanosio suggests using register 26 so that existing the Zephyr source will 'just work' as it includes -mtp-regno=26 in the build scripts. |
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stephanosio
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Nov 3, 2022
For more context, see zephyrproject-rtos/zephyr#51910 (comment) |
keith-packard
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@evgeniy-paltsev Since the transition from r26 to r25 will be implemented later, can you please approve this for now so that we can have TLS working with the toolchain libraries? |
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Zephyr needs a consistent thread pointer register which is respected by all code, not just the OS.
Signed-off-by: Keith Packard [email protected]