To the example code, I only change '%eax' to '1234' and it failed!! So what's the assembler? it's not NASM, it's not MASM. I need to know what's it so as to find its document to know about the syntax. Thank you very much.
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# your code goes here
xor %eax, 1234
The error message
...Program finished with exit code 139
Press ENTER to exit console.