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RE: Seek Help !!! (about getting a pointer to sys_call_table)


>1. - get the pointer to IDT (Interrupt Descriptor Table), using SIDT
>assembly instruction. This instruction will store the value of IDTR
>register of processor, which actually is a pointer to IDT in kernel.

>2. - Once you get the pointer to IDT, get to the 128th entry of IDT by
>multiplying 128 with 8 (as each entry in IDT is of 8 bytes) and adding
>that to the IDT pointer, which we got in first step. This is a pointer
>to the system gate through with system calls enter kernel mode.

	Just a thought, the IDTR holds the physical address of the IDT in
memory right? so to use that in the kernel,
u may have to convert it to virtual address.

gop


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