我当时在做一个应用程序，做了一些修改，现在它甚至不能运行了。我已经恢复了更改，重新构建了整个应用程序，但仍然没有任何进展。我不明白这个错误是怎么发生的？我删除了.o文件，做了一个全新的构建，但它仍然不起作用。我没有更改构建设置，我只修改了一些.cpp文件。

如何解决可执行文件不再可执行的问题？

ls -l
-rwx--x--x    1 root     root       6344081 Sep 16 23:35 z*

gdb输出

[root@ipfrmk /]# gdb z
GNU gdb (GDB) 7.10
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "arm-buildroot-linux-gnueabihf".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
"/z": not in executable format: File truncated
(gdb) run z
Starting program:  z