OSDev.org

hello,
I wrote a simple ISR to test keyboard interrupt. It just prints
a string on the screen if a keyboard interrupt occurs. But when I
pressed a key, the 0xD(General Protection Fault)
handler was firstly activated and then the
keyboard handelr, (0x21) and then the PC restarted.
What's wrong with it?

I used LIDT before I changed into P-Mode. The IDT table is
in the .data section.
And I think I have remapped IRQ0-15 to INT 20H~ INT2FH.
The ESP points to a reserved area in .bss section after
changing into P-Mode.

looking forward to your kind advice, thanks

Hard to diagnose without a peek at the code...

My first impression would be that your IDT entry is invalid/incorrect.

Jeff