.global jump_to_userspace
jump_to_userspace:
mov $0x20 | 0x3, %ax
movw %ax, %ds
movw %ax, %es
movw %ax, %fs
movw %ax, %gs
pushl $0x20 | 0x3  /* SS*/ 
pushl $0x00c00100  /* ESP */ 
pushf              /* EFLAGS */    
popl %eax
orl $0x200, %eax
pushl %eax         /* Set interrupts */
pushl $0x18 | 0x3  /* CS */
pushl $0x00800000  /* EIP */ 
iret