Re: [Valgrind-users] Calling arbitrary guest functions

[John R. <jr...@bi...>]

> I am trying to make a tool that intercepts the call to main, and then
> call an arbitrary function within the guest with arbitrary function
> arguments.

This can be done without valgrind by using LD_PRELOAD environment variable
and RTLD_NEXT (see "man dlsym"):

     LD_PRELOAD=main_interceptor.so  ./my_app args...

where main_interceptor.so is a shared library that has a function main()
and that can call the original main() by using dlsym(RTLD_NEXT, "main").