Question

Why would you want to go through the system-call mechanism when calling an API from kernel mode?

a.

To simplify the process of calling functions

b.

To prove to the API being called that you're actually calling it from kernel mode

c.

To verify that all parameters only contain user-mode addresses

d.

None of the above

Posted under Reverse Engineering

Answer: (b).To prove to the API being called that you're actually calling it from kernel mode Explanation:The reason you would want to go through the system-call mechanism when calling an API from kernel mode is to "prove" to the API being called that you're actually calling it from kernel mode.

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