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= Finding the IOCTL handler address for a device in kernel =
= Finding the IOCTL handler address for a device in kernel =


# Find a string of the device name in kernel.
<pre>
# There should be only two cross-references from function: make_dev and mutex_init. make_dev is the interesting one.
Find a string of the device name in kernel.
# The structure before the device string is what we want to look.
There should be only two cross-references from function: make_dev and mutex_init. make_dev is the interesting one.
# Follow the structure then go to the very last offset of the structure. It is the handler function in charge of IOCTLs for that device.
The structure before the device string is where we want to go.
Follow the structure then go to the very last offset of the structure.
It is the handler function in charge of IOCTLs for that device.
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</pre>


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