Kinda working now

switchTask:
    cli #Clear interrupt flag, to prevent an interrupt from firing while task is switching
    mov 4(%esp), %eax # Move the top of the struct to eax
    mov 4(%eax), %ebx # EBX
    mov 8(%eax), %ecx # ECX
    mov 12(%eax), %edx # EDX
    mov 16(%eax), %esi # ESI
    mov 20(%eax), %edi # EDI
    mov 24(%eax), %esp # ESP
    push %eax # Save eax
    mov 32(%eax), %eax # Move EIP to EAX
    xchg (%esp), %eax # Move the new EIP value into esp, and eax is returned to its previous state
    mov 36(%eax), %ebp # EFLAGS
    push %ebp # Push the flags(stored in ebp)
    popf # Pop the value we just pushed into the flags register, restores interrupt flag, because each process is started with the interrupt flag on, and disabling it would kill the task system (secret info dont tell processes)
    mov 28(%eax), %ebp # EBP
    mov (%eax), %eax # Put EAX back
    push %eax
    mov $102, %ax
    mov %ax, (0xb8000) # put f at screen
    mov %ax, (0xb8002) # put f at screen
    mov %ax, (0xb8004) # put f at screen
    pop %eax
    sti
    ret # Return to the EIP in stack

irq_common_stub:
    pushad
    mov ax, ds
    push eax
    mov ax, 0x10 ;0x10
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov eax, dr6
    push eax
    push esp                 ; At this point ESP is a pointer to where DS (and the rest
                             ; of the interrupt handler state resides)
                             ; Push ESP as 1st parameter as it's a
                             ; pointer to a registers_t
    call irq_handler
    mov eax, [switch_task]
    cmp eax, 1
    je changeTasks
    add esp, 8                 ; Remove the saved ESP on the stack. Efficient to just pop it
                             ; into any register. You could have done: add esp, 4 as well
    pop ebx
    mov ds, bx
    mov es, bx
    mov fs, bx
    mov gs, bx
    popad
    add esp, 8
    sti
    iret

changeTasks:
    mov eax, 1234567
    push eax
    mov eax, 0
    mov [switch_task], eax
    call store_global ; Set a global variable with C
    add esp, 72 ; "Pop" 18 values off the stack
    jmp irq_schedule ; Switch task