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Commit 0b537257 authored by Max Filippov's avatar Max Filippov
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xtensa: implement call0 ABI support in assembly



Replace hardcoded register and opcode names with ABI-agnostic macros.
Add register save/restore code where necessary. Conditionalize windowed
only or call0 only code. Add stack initialization matching _switch_to
epilogue to copy_thread.

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent 5cce39b6
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