On 2017-10-10, at 08:31, Ed Jaffe wrote: > >> Does HLASM know whether you're changing an instruction or data? Should it >> simply >> notify of all negative ORGs? > > I don't want notification of all negative ORGs. Only DC's that overlay > previously-generated instructions. Something not unlike the existing RENT > option... > The catch is that HLASM has no way of distingushing "previously-generated instructions" from previously-generated data. Bit map? Lots of code. I wouldn't bet on an RFE. Slightly more feasible would be an option on LOCTR declaring that only code or only data may oppear governed by that LOCTR, and that code LOCTRs must not be overwritten.
Some non-z architectures have additional segment protection enforcing the distinction between code segments and data segments at execution time. -- gil
