#include uint64_t create_descriptor(uint32_t base, uint32_t limit, uint16_t flag) { uint64_t descriptor; descriptor = limit & 0x000F0000; descriptor |= (flag << 8) & 0x00F0FF00; descriptor |= (base >> 16) & 0x000000FF; descriptor |= base & 0xFF000000; descriptor <<= 32; descriptor |= base << 16; descriptor |= limit & 0x0000FFFF; return descriptor; }