In bare-metal AArch64, rust generates tpidr0 as the default register for thread_local calculations. For scenarios like kernel, tpidr1 should be used instead of tpidr0.
How to make rust compiler generate code to use tpidr1 instead of the default?
How to compile rust with tpidr1 as thread local register
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1 Answers
LLVM support a custom attribute -mattr=tipdr-el[1|2|3] to override the thread local register.
By default, tipdr0 is used for this purpose. This can be overriden in rust by doing something like the following
rustc -C target-feature=tpidr-el1 --target=aarch64-unknown-none
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