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Load Map

I am writing a driver/user space set of programs.  The driver worked 
until yesterday and I don't understand why.  I can open the driver but 
the first ioctl call to the driver hammers the computer.  It is as if 
the call is going to the wrong address.  Is there a way that I can get a 
load map giving me the address of the ioctl function and then perhaps I 
can compare that to the address that is being called from the user space 
program.

I am trying to get a serial console working, but have too many males and 
not enough female connections...anyway that's another story.

Any info that you could provide would be very helpful.

TIA
David

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