I think I'd be unlikely to get it right on the first try. I had never even heard of the "RENAME" statement, but it exists, alongside the venerable "CHANGE" statement. I don't presently have the time to sort that out. And the required order of statements is sometimes surprising. Nevertheless, I'm sure it's doable.
sas On Wed, Apr 15, 2020 at 4:12 PM Charles Mills <[email protected]> wrote: > So every call to AX would instead call an entrypoint within a new module > (except for one call from within that new module, which would call the old > AX)? > > Yes, I think binder RENAME can do that. > > Code the new module to with a hard-coded entry of AX and an internal call > to > AXMINUS. No point in making that part difficult. > > Include the old AX. Follow that with RENAME AX(AXMINUS) > > Then Include the new module and everything else and link as normal. > > I think that is close at least. May require some tweaking. > > Charles > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Phil Smith III > Sent: Wednesday, April 15, 2020 12:44 PM > To: [email protected] > Subject: Linkage editor question: renaming duplicate entry points > > I have a use case that's reasonable enough that it might be supported, yet > odd enough that I'd be unsurprised if it isn't. > > > > Suppose we have a function called AX that we call. At times it would be > useful to be able to relink a program that calls AX to add a "shim"-let's > call it AXPRIME-between the program and AX. Yet we don't want to change > that > program code, just relink it (or point at a different library and make a > dynamic call to AX). > > > > Ideally, we could tell the linker "OK, load deck AXPRIME [which has entry > point AX defined]; now include deck AX but rename entry point AX in that > deck to AXMINUS". And the AXPRIME code would call AXMINUS to do what AX > usually does. > > > > The alternative-hacking AX itself-is of course possible but undesirable, > because we don't want the shim functionality to be there all the time, as > it > represents a security hole. The shim is added explicitly when needed, so > it's a "your gun, your foot" deal. > > > > Anyone know whether this is possible with IEWL or anything else? > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- sas ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
