汇编语言学习系列 打印数组实现

假如汇编语言要实现如下C语言的功能，编译环境Ubuntu14.04（32位）。

#include<stdio.h>

int main(){



    int a[] = {3, 0, 5, 1, 4, 6, 2, 9, 8, 7};

    int i;

    for(i = 0; i< 10; i++)

        printf("%d\n", a[i]);

    return 0;

}

• 代码

.section .data

        array: .int 3, 0, 5, 1, 4, 6, 2, 9, 8, 7

        len: .int 10

        format: .asciz "%d\n"

.section .text

.global _start

_start:

        pushl %ebp

        movl %esp, %ebp

        subl $20, %esp    #allocate space

        

        movl $array, %edx

        movl %edx, (%esp)    #store &array on the stack

        

        movl len, %ecx

        movl %ecx, 4(%esp)    #store len on the stack

        

        call parray　　

        

        addl $20, %esp

        popl %ebp



        movl $0, (%esp)    #deallocate space

        call exit

parray:

        pushl %ebp

        movl %esp, %ebp

        push %ebx        

        

        movl 8(%ebp), %edx    #get &array

        movl 12(%ebp), %ebx    #get len

        

        movl $0, %ecx　　#计数器i初始化为0

        cmp %ecx, %ebx

        jle .done

.loop:

        movl (%edx, %ecx, 4), %eax

        

        call print

        

        inc %ecx　　#i每次加1

        cmp %ecx, %ebx

        jg .loop        

.done:

        popl %ebx

        popl %ebp

        ret

        

print:

        pushl %edx

        pushl %ecx

        

        pushl %eax

        pushl $format

        call printf

        

        addl $8, %esp

        popl %ecx

        popl %edx

        

        ret

        

• 编译

 as parray.s -o parray.o

• 链接

ld -lc -I /lib/ld-linux.so.2 parray.o -o parray

• 执行

 ./parray