我最近一直在研究逆向工程，想了解更多关于ASM的知识。因此我查阅了一些教程，但发现了一些关于dx寄存器的令人困惑的信息。
我在这里写了一个小的“Hello World”示例：

section .text
    global _start

_start:
    mov edx, mes_len ; Store where the bytes end for the data in the data register
    mov ecx, message ; Store the reference to the message that we're going to write in the counter register
    mov ebx, 1 ; Tell tha base register that we want to push to the stdout
    mov eax, 4 ; Move 4 into the Accumulator which is the equivalent of calling sys write on linux
    int 0x80 ; int means interrupt, 0x80 means interrupt the kernel to make our system calls

    mov eax, 1 ; Move 1 into accumulator, which is sys exit on linux
    mov ebx, 0 ; exit code 0
    int 0x80

section .data
    message: db "Hello, World", 10, 0 ; 10 is the newline character and 0 is the null character
    mes_len: equ $ - message ; "$" means current position, then we subtract that from the length of our message

和线

mov edx, mes_len ; Store where the bytes end for the data in the data register

根据this source，edx与Accumulator一起用于复杂的计算，如除法或乘法，但也用于I/O。然后它声明数据寄存器保存消息的地址，但累加器不也保存消息的地址吗？
任何帮助将不胜感激。