gdt_set 135 bsp/hal/x86/arch/cpu.c gdt_set(KERNEL_CS / 8, 0, 0xffffffff, ST_KERN | ST_CODE_R, SIZE_32); gdt_set 136 bsp/hal/x86/arch/cpu.c gdt_set(KERNEL_DS / 8, 0, 0xffffffff, ST_KERN | ST_DATA_W, SIZE_32); gdt_set 137 bsp/hal/x86/arch/cpu.c gdt_set(USER_CS / 8, 0, 0xffffffff, ST_USER | ST_CODE_R, SIZE_32); gdt_set 138 bsp/hal/x86/arch/cpu.c gdt_set(USER_DS / 8, 0, 0xffffffff, ST_USER | ST_DATA_W, SIZE_32); gdt_set 198 bsp/hal/x86/arch/cpu.c gdt_set(KERNEL_TSS / 8, &tss, sizeof(struct tss) - 1,