I have simple c program like, my_bin.c:

#include <stdio.h>

int main()
{
    printf("Success!\n");
    return 0;
}

I compile it with gcc and got executable: my_bin.

Now I want to invoke main (or run this my_bin) using another C program. That I did with mmap and function pointer like this:

#include <stdio.h>
#include <fcntl.h>
#include <sys/mman.h>
int main()
{
   void (*fun)();
   int fd;
   int *map;
   fd = open("./my_bin", O_RDONLY);
   map = mmap(0, 8378, PROT_READ, MAP_SHARED, fd, 0);
   fun = map;
   fun();
   return 0;
}

PS: I went through some tutorial, for how to read binary file and execute.

But this gives Seg fault, any help appreciated! Thanks!