ST_DATA_W 136 bsp/hal/x86/arch/cpu.c gdt_set(KERNEL_DS / 8, 0, 0xffffffff, ST_KERN | ST_DATA_W, SIZE_32); ST_DATA_W 138 bsp/hal/x86/arch/cpu.c gdt_set(USER_DS / 8, 0, 0xffffffff, ST_USER | ST_DATA_W, SIZE_32);