Can I use dt_infect to work on .so file?

[Yabin Zheng]

Example case:

• excutable: a.out
• linked .so file: libmath.so
• function in .so file that called by excutable: int add(int, int)
• target: Using function interposition to print the arguments of add.

I tried with dt_inject. Put a new int add(int, int) function in libevil.so in the same manner as the example.
Then tried:

./inject libevil.so libmath.so

Outputs says "Successfully injected".
However when I tried to run a.out, the loader came with the error:
ELF load command address/offset not properly aligned.