Current Pointer and interrupt processing

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Hi all,

I read one statement in LDD in 6th chapter about
interrupt.

"The current pointer is not valid in interrupt mode
and can't be used". 

I am not able to get it. Can anybody plz explain me
what author want to convey by using above statement.

Also i have one confusion. After processing an
interrupt i.e. executing an interrupt handler routine
will it continoues to execute the same process or
context switch is possible to happen and after that it
will wake up a blocked process like a driver waiting
for some event. 

thanks in advance,
Deepak Joshi


		
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