RockOS/kernel/common_stubs.S

.code32 
.section .text 
.global disable_interrupts
disable_interrupts:
    cli 
    ret

.global enable_interrupts
enable_interrupts:
    sti 
    ret

.global io_wait 
io_wait:
    outb %al, $0x80
    ret

.global liftoff
liftoff:
    cli

    mov 4(%esp), %ecx
    mov 8(%esp), %ebx

    mov $0x23, %ax
    mov %ax, %ds
    mov %ax, %es
    mov %ax, %fs
    mov %ax, %gs

    push $0x23           
    push %ebx
    push $0x202
    push $0x1B
    push %ecx

    xor %eax, %eax
    xor %edx, %edx
    
    iret