装配添加程序

Question

我有以下代码

section .bss
    num1 resb 2
    num2 resb 2
    res1 resb 2
    res2 resb 2

section .data
    fir dw 'Ingrese el primer numero: '
    lfir equ $ - fir
    sec dw 'Ingrese el segundo numero: '
    lsec equ $ - sec

    newline db 10


section .text
    global _start

_start:
    mov dl,lfir     ;print "Ingrese el primer numero: "
    mov ecx,fir
    mov bl,1
    mov al,4
    int 0x80

    mov dl,5        ;read the first number
    mov ecx,num1
    mov bl,2
    mov al,3
    int 0x80

    mov dl,lsec     ;print "Ingrese el segundo numero: "
    mov ecx,sec
    mov bl,1
    mov al,4
    int 0x80

    mov dl,5        ;read the second number
    mov ecx,num2
    mov bl,2
    mov al,3
    int 0x80

    mov eax,[num1]  ;move the first number into eax
    mov ebx,[num2]  ;move the second number to ebx
    sub ebx,48      ;conver the number to decimal
    add eax,ebx     ;add the 2 numbers
    mov [res1],eax  ;move the result into "res1"

    cmp eax, 57 ;check if the result has 2 digits
    jle singledigit ;instructions when it has 2 digits

    mov eax,[res1]
    sub eax,10
    mov [res1],eax
    mov ebx,'1'
    mov [res2],ebx

    mov dl,2        ;print res2
    mov ecx,res2
    mov ebx,1
    mov eax,4
    int 0x80

    mov dl,2        ;print res1
    mov ecx,res1
    mov ebx,1
    mov eax,4
    int 0x80

    jmp finish

singledigit:
    mov dl,2        ;print res1
    mov ecx,res1
    mov ebx,1
    mov eax,4
    int 0x80

    jmp finish

finish:
    mov dl,1        ;new line
    mov ecx,newline
    mov ebx,1
    mov eax,4
    int 0x80

    mov al,1
    int 0x80

它似乎总是会忽略个位数标签，因此当总和小于10时打印低于48的ascii字符（ascii 0），但当总和大于10时它工作正常

Answer 1

就像迈克尔说的，替换每一个

mov eax,[num1] 与

movzx eax,字节[num1];

对于 ebx 和 num2 来说也是如此，确实解决了问题