Skip, Thanks.
I never new that. And it also explains why my customer did get the 0C4. His module, which calls my module, is APF authorized, but his calling module was not re-entrant. So the linked stub did not fail, but the dynamically called module did.
I guess I have more reading to do re: re-entrant programs. I mostly work in CICS, and CICS honors the RENT declaration when it loads the program.
Regards, Gary DiPillo On 07/19/2011 3:50 PM, Skip Robinson wrote:
RENT is honored--i.e. failed if violated--only if the load library is APF authorized. . . JO.Skip Robinson SCE Infrastructure Technology Services Electric Dragon Team Paddler SHARE MVS Program Co-Manager 626-302-7535 Office 323-715-0595 Mobile [email protected] From: Gary DiPillo<[email protected]> To: [email protected] Date: 07/19/2011 12:43 PM Subject: Re-entrant module stores into itself with no 0C4 Sent by: IBM Mainframe Discussion List<[email protected]> I have run into a situation I have never seen before and did not think was possible. I must be missing something, but I haven't got a clue as to what. I have a batch program (A) that is re-entrant. However, statically linked to it is a program (B) that is not re-entrant. When this program B is called, it stores program (A)'s R13 in a save area within program (B)'s own storage. No ABEND, no program check. I used to think this was worthy of an 0C4. This program (B) issues a LOAD EP=C and stores the entry point address of the loaded program (C) in a data area within program (B). Again, no 0C4. Program (B) then CALLs the loaded program (C), which is also link-edited as re-entrant. Module (C) stores all kinds of data in data areas within itself. Again, no 0C4. The three programs involved are are all Assembler and linked RN, RU, even though two of them (B) and (C) are not re-entrant (my error). They are all in the same load library which is the only library the the batch job step's STEPLIB. None of the programs is in the LPA, nor is the library in the LINKLIST, nor are the programs in any other LINKLISTed library. My z/OS V1R10 image is a guest running under z/VM. Can someone suggest how these programs that are marked as re-entrant can be loaded and executed without error even though they are storing data within themselves? TIA, Gary DiPillo ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
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