set_idt_entry
set_idt_entry(X86_TRAP_VC, boot_stage1_vc);
set_idt_entry(X86_TRAP_PF, boot_page_fault);
set_idt_entry(X86_TRAP_NMI, boot_nmi_trap);
set_idt_entry(X86_TRAP_VC, boot_stage2_vc);
set_idt_entry(X86_TRAP_VC, NULL);
set_idt_entry(vm, i, (unsigned long)(&idt_handlers)[i], 0, KERNEL_CS);