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[Question] Difference between _coroutine_begin & _coroutine_setcontext #54

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flybrotherlixiang opened this issue Mar 20, 2019 · 1 comment
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[Question] Difference between _coroutine_begin & _coroutine_setcontext #54

flybrotherlixiang opened this issue Mar 20, 2019 · 1 comment
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@NianJi

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@flybrotherlixiang
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I checked the implementation of _coroutine_begin and _coroutine_setcontext in coroutine_context.s and it appears that _coroutine_begin uses x9 as return address and _coroutine_setcontext uses x30.

Why is that necessary?
@pengyutang125
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_coroutine_begin and _coroutine_setcontext are almost the same, but _coroutine_begin will set the lr register to 0, it can make your debug stack more clear

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@NianJi NianJi

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@pengyutang125 @NianJi @flybrotherlixiang