Stack thunk yield() fixes #9224
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implement stack_thunk_yield() which is called within bssl stack overflow checks for cont would always fail otherwise
mcspr
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Post esp8266#9224, allow to call 'stack_thunk_yield()' outside of bssl context Reset 'stack_thunk_save' before returning from 'thunk_...'ed function
mcspr
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post #9224, allow to call 'stack_thunk_yield()' outside of bssl context Reset 'stack_thunk_save' before returning from 'thunk_...'ed function Skip invalid a1 load and yield with the current value
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Resolve #9170
Resolve #9218
See earlephilhower/bearssl-esp8266#19
upd from the original Sep 2024 version
can_yield() + yield() -> optimistic_yield(10000) (aka 10ms) for a shorter func body