Techniques are disclosed to operate binary objects across private address spaces. In various embodiments, a private shared memory segment is allocated for two non-privileged address spaces, the first comprising a home address space and the second comprising a target address space. One or more executable modules are loaded in a private address space of the home address space. One or more program call routines and an environment to schedule system request blocks (SRB) are built in the home address space. The environment to schedule system request blocks is configured to be used to schedule an SRB into the target address space, the SRB comprising information configured to cause the target address space to cause an associated one of the executable modules to execute.