Question

我使用Linux和g cc编译器。我尝试将二进制文件转换为文本文件并将其反转为可执行二进制文件。当我尝试使用./filename文件运行反向时，我得到错误:: bash：./ filename：无法执行二进制文件：exec format error.need帮助解决这个问题这是我做的步骤：

save hello.c file        // in main() only print "hello world"
gcc hello.c -o hello    //get executable file
xxd -b hello | cut -d" " -f 2-7 | tr "\n" " " > output.txt  // convert binary file to text file
sed -i 's/^\(.\)\{9\}//g' output.txt   
sed -i 's/\(.\)\{16\}$//g' output.txt
for i in $(cat output.txt) ; do printf "\x$i" ; done > reversebinfile //convert text file into binary file 
chmod 777 reversebinfile
./reversebinfile
get error : bash: ./shay: cannot execute binary file: Exec format error

Answer 1

xxd的输出已经是一个文本文件了，为什么你cut和sed呢？

此外，xxd -r会撤消转化：

xxd hello > output.txt
xxd -r output.txt > reversebinfile

从文本文件创建binaty可执行文件

1 个答案: