Using the address portion of the PSW field in that RB, locate
that address in the dump and scan toward either the lower or higher
addresses, looking in the translated EBCDIC in the right-hand column
for a module name. Common O/C/EOV modules contain the CSECT name in
the copyright information at the start of each CSECT and in the XCTL
table at the end of each CSECT. Typically, register 6 will point to
the name of the current CSECT.
You can also determine the load
module name by matching the PSW instruction address with the addresses
in an LPA map (all common O/C/EOV load modules and CSECTs reside in
the LPA).