Why is this asm code running?

Question

assembler

I have code that compiles with NASM and runs in QEMU. It should just output Hello, world in the BIOS. But along with it, reboot_req is launched. What is the problem?

[org 0x8000]

mov si, helloworld
call print
mov si, newline
call print

reboot_req:
    mov si, reboot_request
    call print
    mov ah, 0x0
    int 0x16
    int 0x19

%include "print.asm"
helloworld: db "Hello, world!!!", 0
newline: db 0x0d, 0xa, 0
reboot_request: db 0x0d,0xa, "Press any key to reboot...", 0x0d,0xa,0
cmd: db "$ ", 0
wrongcmd: db "Wrong command!!!", 0
times 2048-($-$$) db 0

And this is the print.asm file

print:
    push ax
    push si

    mov ah, 0x0e
    .Loop:
    mov al, [si]
    cmp al, 0
    je .Exit
    int 0x10
    inc si
    jmp .Loop
    .Exit:
    pop ax
    pop si
    ret

Answer 1

print.asm

print:
    push ax
    push si
......
    pop ax
    pop si

first you need to fix the error - the pop commands must be called in the reverse order, compared to the push commands, and for you they are NOT in the reverse order