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Re: NULL dereference ? why not ?

On 1/3/07, James Stevenson <james@xxxxxxxx> wrote: 
Yes it can be valid. However there may be purpose to have data there and
accessibly but because it's a virtual address it may not have any data
mapped to it thus it is invalid.


allowing physical memory access to address 0 and virtual memory access
to address 0 is different

while i can see a valid use for allowing physical memory access to
address 0 (but only in an embedded system), i cannot think of one good
reason to allow access to virtual address 0 in light of all the debug
catching
-mike

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