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I have uncontrollable 0xD cpu exception after doing a software interrupt. I don't know why is it broken. Maybe something with paging? I need software interrupts for syscalls. It is really important and i don't know why doesn't it work.
src: https://github.com/nergzd723/ethanium

In your handler for the general protection exception halt the processor. You can then inspect the saved IP value to see exactly where the fault is occurring.