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Hi, people.
I read the past thread and I can move from kernel mode to user mode in my OS. But interrupts haven't worked and general protection has occured, when my OS is user mode.
Please help me.

which interrupt didn't worked ?
when exactly did you get a GPF ? (on what instruction ?)
Did you set up a TSS for your user task and set SS0 and ESP0 appropriately ?
What is the error code (i.e. the faulty segment) of your GPF ?

Please, help us helping you