Blocking Low core access from Assembler programs

[syama prasad]

Hi,
Is it possible to force an Assembler program to hit an access error if it tries 
to load data from the low core (page starting from address zero)?Assembler 
*PROCESS FLAG(PAGE0) " helps to find cases like MVC TARGET,1But will it be 
possible to have a run time detection and possibly a dump if the program tries 
to do things likeLA R5,1MVC TARGET,0(R5)Basically, any way to restrict access 
of an application program to PSA- first control block?
Regards,Syama