ST_CODE_R 135 bsp/hal/x86/arch/cpu.c gdt_set(KERNEL_CS / 8, 0, 0xffffffff, ST_KERN | ST_CODE_R, SIZE_32); ST_CODE_R 137 bsp/hal/x86/arch/cpu.c gdt_set(USER_CS / 8, 0, 0xffffffff, ST_USER | ST_CODE_R, SIZE_32);