Look at 'zOS Language Environment Vendor Interfaces'.
On 20.08.2014 11:35, Hardee, Chuck wrote:
David, You say that the subroutine linkage is different. Can you tell me where the linkage is documented? I'd like to understand how XPLINK linkage works for incorporation into some of my routines. Thanks, Chuck Charles (Chuck) Hardee Senior Systems Engineer/Database Administration CCG Information Technology Thermo Fisher Scientific 300 Industry Drive | Pittsburgh, PA 15275 Phone +1 (724) 517-2633 | Mobile +1 (412) 877-2809 | FAX: +1 (412) 490-9230 chuck.har...@thermofisher.com | www.thermofisher.com WORLDWIDE CONFIDENTIALITY NOTE: Dissemination, distribution or copying of this e-mail or the information herein by anyone other than the intended recipient, or an employee or agent of a system responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient, please inform the sender and delete all copies. -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of David Crayford Sent: Tuesday, August 19, 2014 11:19 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: ASM calling C or C++ subroutines That looks good to me. Make sure that you setup the parameter lists correctly. C/C++ are call by value languages. The code path for calling a routine is just a few instructions. It loads LE control blocks into registers and then uses BSM to invoke the routine. You certainly will need LE if your calling C/C++ code other than Metal/C. You only need XPLINK if your C/C++ programs are compiled XPLINK. I always use XPLINK because it almost always generates faster code but the subroutine linkage is very different to OS linkage and you have to take that into consideration when debugging. On 20/08/2014 4:28 AM, Donald Likens wrote:I have been looking at the LE documentation now for days and still not sure what I need to do to have my Assembler program call C or C++ programs. I need this interface to be very efficient because I will be calling these subroutines maybe more than a 1,000,000 times a day. What I have come up with is to use CEEPIPI to build the environment. LA R5,PPTBL GET ADDRESS OF PIPI TABLE ST R5,@CEXPTBL CEEXPTBL-ADDR -> PIPI TABLE L R15,PPRTNPTR GET ADDRESS OF CEEPIPI ROUTINE * INVOKE CEEPIPI ROUTINE CALL (15),(INITSUB,@CEXPTBL,@SRVRTNS,RUNTMOPT,TOKEN) I will have three subroutines so I think I need to put each one of these routines in the preinit table. Now I think I need to use CEEPIPI again when I want to call each subroutine. ST R11,PARM L R15,PPRTNPTR GET ADDRESS OF CEEPIPI ROUTINE CALL (15),(CALLSUB,PTBINDEX,TOKEN,PARM, X SUBRETC,SUBRSNC,SUBFBC) INVOKE CEEPIPI ROUTINE Note: Note: The C routines have not been created yet, so I can't try these things out. Questions: 1) Do I have it correct? 2) Do I even need LE? 3) The book talks about XPLINK. I don't quite understand it. Is this something I should explore more? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
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