警告:找不到输入符号\u start;默认为0000000008048060

这是我的密码。(注意这是另一个来源)

    segment .text

    global main
main:

    xor     edx, edx
    mov     eax, 15
    mov     ecx, 3
    div     ecx
    xor     ecx, ecx
    mov     cx, ax
    mov ebx,1       ; arg1, where to write, screen
    mov eax,4       ; write sysout command to int 80 hex
    int 0x80        ; interrupt 80 hex, call kernel



exit:   mov eax, 1
    xor ebx, ebx 
    int 0x80

$nasm -f elf *.asm; ld -m elf_i386 -s -o demo *.o
ld: warning: cannot find entry symbol _start; defaulting to 0000000008048060
$demo