如何修复汇编中的“错误:行尾有垃圾，第一个无法识别的字符0xe2" [英] How to fix 'Error: junk at end of line, first unrecognized character 0xe2' in Assembly

问题描述

我试图在树莓派3上编写一个基本的arm汇编文件，该文件可以通过gcc编译器访问printf和scanf，但是在编译代码时出现了一个奇怪的错误.

I am trying to write a basic arm assembly file on my raspberry pi 3 that has access to printf and scanf through the gcc compiler, but upon compiling my code I get a strange error.

这是我用汇编语言编写的第三个使用gcc编译器的应用程序，所以我想进行增量测试，所以我设置了提示和字符串，然后尝试干净退出.但是，这是我的代码引发错误:

This is my third application written in assembly to use the gcc compiler, so I wanted to do incremental testing so I set up my prompts and strings, and I try and exit cleanly; however, this is my code that throws the error:

.data
    .balign 4
    promptNum1: .asciz "Please enter some number that you want to work with"
    .balign 4
    inputNum1String: .asciz "%d"
    .balign 4
    outputString: .asciz "Your answer is %d"
    .balign 4
    return: .word 0
    .balign 4
    signPrompt: .word "What do you want the numbers to do?\n 1)add \n 2)subtract\n 3)multiply\n 4)divide"
.text
.global main
main: 
    ldr r11, addressOfReturn
    str lr, [r11]
.
.
.
    ldr r11, addressOfReturn
    ldr lr, [r11]
    bx lr

addressOfPromptNum1: .word promptNum1
addressOfInputNum1String: .word inputNum1String
addressOfOutputString: .word outputString
addressOfReturn: .word return

我希望可以像以前的代码一样进行编译，但是，我的错误引用了提示行Num1，inputNum1String，outputString，signPrompt上无法识别的字符.但是，无法识别的字符是 0xe2 ，在查找后我发现编译器无法识别的字符根本不在文件中.

I expect this to compile as my previous code did, however, my error references an unrecognized character on the lines with promptNum1, inputNum1String, outputString, signPrompt. However, the character that is unrecognized is 0xe2, and upon looking that up I found that the character that is not recognized by the compiler is not in my file at all.

推荐答案

代码中的引号是智能引号"(utf-8序列 e2 80 9c 和 e2 80 9d)，在汇编程序中效果不佳.将它们更改为常规引号就可以了.

The quotes in your code are "smart quotes" (the utf-8 sequences e2 80 9c and e2 80 9d), which isn't playing well with the assembler. Change them to be regular quotes and you should be fine.

.data
    .balign 4
    promptNum1: .asciz "Please enter some number that you want to work with"
    .balign 4
    inputNum1String: .asciz "%d"
    .balign 4
    outputString: .asciz "Your answer is %d"
    .balign 4
    return: .word 0
    .balign 4
    signPrompt: .word "What do you want the numbers to do?\n 1)add \n 2)subtract\n 3)multiply\n 4)divide"
.text
.global main
main: 
    ldr r11, addressOfReturn
    str lr, [r11]
.
.
.
    ldr r11, addressOfReturn
    ldr lr, [r11]
    bx lr

addressOfPromptNum1: .word promptNum1
addressOfInputNum1String: .word inputNum1String
addressOfOutputString: .word outputString
addressOfReturn: .word return

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