mips - .asciiz 与 .ascii 之间有什么区别

Question

我读到 .asciiz null 终止字符串(附加 \n？)...但是当查看 QtSPIM 的用户数据段时，

User data segment [10000000]..[10040000]
[10000000]..[1000ffff]  00000000
[10010000]    6c6c6548  6f57206f  00646c72  6c6c6548    H e l l o   W o r l d . H e l l 
[10010010]    6f57206f  00646c72  00000000  00000000    o   W o r l d . . . . . . . . . 
[10010020]..[1003ffff]  00000000

我没看出什么区别吗？

.data
  str1: .asciiz "Hello World" # string str1 = "Hello World"
  str2: .ascii "Hello World" # string str2 = "Hello World"

.text
  .globl main
    main: 
      li $v0, 4 # print_string

      # print(str1)
      la $a0, str1 # load address of str1 into $a0
      syscall

      # print(str2)
      la $a0, str2 # load address of str2 into $a0
      syscall

      j $ra

输出“Hello WorldHello World”

更新

分别有什么含义或者什么时候使用？ asciiz 听起来像是“正确的”方法？

Answer 1

正如 @osgx 所写，ASCIIZ 表示字符串以 \0(ASCII 代码 0)NUL 字符终止。他们甚至被称为C strings 。引用那里的内容:

In computing, a C string is a character sequence terminated with a null character ('\0', called NUL in ASCII). It is usually stored as one-dimensional character array.[dubious – discuss] The name refers to the C programming language which uses this string representation. Alternative names are ASCIIZ (note that C strings do not imply the use of ASCII) and null-terminated string.