CODEWITHSUNDEEP
pythondllctypessymbolsdynamic-library
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Reputation: 11835

like nm -D or readelf -s, list dynamic symbols with python ctypes?

is it possible implement nm -D or readelf -s using python ctypes?

I want to list all dynamic symbols of a .so file.

Thanks in advance!

Upvotes: 4

Views: 1925

Answers (1)

ulidtko
ulidtko

Reputation: 15550

My answer is: No, it is highly unlikely that ctypes will give you the enumeration of all available symbols in a library.

Reasons for this are mainly in the scope of ctypes as a Python module, and the scope of dynamic library API's: POSIX dlopen+dlsym or Win32 LoadLibrary+GetProcAddress. The primary task of these API's is to, well, load DLL's and obtain callable addresses by symbol names/ordinals. They are not designed for symbol enumeration. You can't list symbols using them; and CPython relies on them, off course, to implement its functions.

It is also needs to be explained that the nm and readelf tools you mentioned do their own parsing of executable files to get the symbols list. This is quite tangential to loading the library into memory as an executable module. So you will need a different Python module to do that, something like python-elf for example.

Upvotes: 4

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