19 Nov
2018
19 Nov
'18
1:31 p.m.
IFBR14 if you all are not familiar with MVS / MVT
batch programming
is a program which immediately terminates w/o any return codes by
doing an assembly language return to the caller of the job step via
the contents of R14 of the processor, which is also the return
address.
Actually, in the aforementioned environment, it's not really possible to
return without a code. The relevant register will contain some value,
whether you set it or not.
The famous bug in IEFBR14 was that it failed to set that return code, so
the job often aborted due to whatever garbage was in the register.
De