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= Finding the IOCTL handler address for a device in kernel =
= The process of ioctl in devices =


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<pre>
Find a string of the device in kernel.
find string of device in kernel
There should be only two cross-references from function: make_dev and mutex_init. make_dev is the interesting one.
find xrefs to func (should be two only)
The structure before the device string is where we want to go.
make_dev and mutex_init (we want make_dev)
Follow the structure then go to the very last offset of the structure.
structure before string is where we want to go
It is the handler function in charge of IOCTLs for that device.
follow structure then go to the very last offset of structure
it is func in charge of ioctls
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