.globl switch





switch:

  
    mov $0x23, %ax
    mov %ax, %ds
    mov %ax, %es
    mov %ax, %fs
    mov %ax, %gs
   
    push $0x23  # 
    push $0x80
    pushf
    pop %rax
    #orl $0x200, %%eax
    mov $0xffffbfff, %rbx
    and %rbx, %rax
    push %rax
    push $0x1B
    push $0x0
    
    iretq