visor/include/x86/idt.h

#ifndef _VISOR_IDT_H_
#define _VISOR_IDT_H_

#include <stdint.h>

__attribute__ ((packed))
struct intdescr {
	uint16_t offset0;
	uint16_t seg;
	uint8_t  ist;
	uint8_t  access;
	uint16_t offset1;
	uint32_t offset2;
	uint32_t reserved;
};

__attribute__ ((packed))
struct IDTR {
	uint16_t limit;
	struct intdescr *base;
};

static inline struct IDTR
storeidt(void)
{
	struct IDTR idtr;
	__asm__ ("sidt %0\n\t" : "=m"(idtr));
	return idtr;
}

static inline void
setintdescr(struct intdescr *descr, uint64_t offset, uint16_t seg, uint8_t ist, uint8_t access)
{
	descr->offset0  = offset;
	descr->seg      = seg;
	descr->ist      = ist;
	descr->access   = access;
	descr->offset1  = offset >> 16;
	descr->offset2  = offset >> 32;
	descr->reserved = 0;
}

#endif