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Why in Vxworks a separate stack is used by interrupt?Why...

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Question by Raghu
Submitted on 8/7/2003
Related FAQ: N/A
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Why in Vxworks a separate stack is used by interrupt?Why can't it use the stack of the interrupted task itself which in some it does that.Is there any added advantage using separate stack?

Answer by Vijay
Submitted on 2/16/2007
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a. Per task stack depth required would depend on the level of interrupt nesting possible in the system. Hence its cleaner to have a separate interrupt stack (else every task will have to allocate sufficient stack space)

b. back-chaining to support PPC ABI may not work.


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