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I'm aware that the kernel stack is very limited - Are there any guidelines for when I should expand the stack? Can you give me some examples of real use cases?
I guess that in most cases it's pretty hard to know when you should expand the stack... well, I guess that the guideline is something like: In paths that you think the stack space can be large, call IoGetRemainingStackSize() to check the bytes left and call KeExpandKernelStackAndCalloutEx if necessary... The question is: In which cases do you think this check is necessary?
Also, when I do expand the stack, can I reference memory from the previous stack segment or is it not guaranteed to be valid?
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