It depends on the SVC. The Diagnosis book describes the register requirements.
In article <9822352a8a50b84aba12bde56fcda26068953...@mail01.intranet.set.de> you wrote: > Don, > thanks for the hints. I already did all this - to keep the ASM part as small > as possible I allocated all the stuff I need in the C part using __malloc31() > and passed the pointers to the ASM module. Regarding the Save Area - I guess > R13 does not have to point to a SA when invoking a SVC, right?!? At least I > didn't noticed anything about that in the documentation to OUTADD (which > invokes SVC 109). > Bye, > Michael > Mit freundlichen Gr??en > Michael Knigge > Software Engineer > SET GmbH > Lister Stra?e 15 > 30163 Hannover > phone: +49 511 39780-23 > fax: +49 511 39780-65 > www.set.de > michael.kni...@set.de > Handelsregister: HRB52778 Amtsgericht Hannover > Gesch?ftsf?hrer: Till Dammermann, Dr. Bernd Huber > Anstehende Termine: > POSY-OutputForum, 4. und 5. November 2015 in Hannover > Weitere Informationen finden Sie auf unserer Homepage... > -----Urspr?ngliche Nachricht----- > Von: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] Im > Auftrag von Don Poitras > Gesendet: Montag, 12. Oktober 2015 14:12 > An: IBM-MAIN@LISTSERV.UA.EDU > Betreff: Re: Invoke AMODE31-only Code from AMODE64 > Michael, > There are some other considerations. If the routine requires a save area > and you are running XPLINK, you need to allocate 72 bytes below the bar and > point R13 to it. Also, any parms passed to the routine must be below the bar. > Any parms that contain pointers used by the routine must also be below the > bar, etc. etc. LE provides __malloc31() to get "middle" memory. > In article <9822352a8a50b84aba12bde56fcda26068953...@mail01.intranet.set.de> > you wrote: > > Binyamin, > > I guess I was lost in the woods of IBM manuals. When I started using Google > > to find the right manual I just came across some weired (at least to me) > > Branch-Statements that should be using when crossing AMODEs. > > Just after I've read your reply I googled again and just found the > > instructions you've mentioned. I've just updated my code and currently it > > looks like everything is working as I would expect... But I've just > > finished my first little isolated test.... > > So far thank you for your fast and helpful reply.... > > Bye, > > Michael > > Mit freundlichen Gr??en > > Michael Knigge > > Software Engineer > > SET GmbH > > Lister Stra?e 15 > > 30163 Hannover > > phone: +49 511 39780-23 > > fax: +49 511 39780-65 > > www.set.de > > michael.kni...@set.de > > Handelsregister: HRB52778 Amtsgericht Hannover > > Gesch?ftsf?hrer: Till Dammermann, Dr. Bernd Huber > > Anstehende Termine: > > POSY-OutputForum, 4. und 5. November 2015 in Hannover > > Weitere Informationen finden Sie auf unserer Homepage... > > -----Urspr?ngliche Nachricht----- > > Von: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > > Im Auftrag von Binyamin Dissen > > Gesendet: Montag, 12. Oktober 2015 10:30 > > An: IBM-MAIN@LISTSERV.UA.EDU > > Betreff: Re: Invoke AMODE31-only Code from AMODE64 > > I do not really understand your question. > > If your code is running below the bar and the data items required for the > > service are below the bar, the machine instruction SAM31 will change the > > amode to 31 bit and the machine instruction SAM64 will set 64 bit amode,. > > On Mon, 12 Oct 2015 08:15:15 +0000 Michael Knigge > > <michael.kni...@set.de> > > wrote: > > :>is it possible to invoke AMODE31-only code from an AMODE64 module? > > :>To be more detailed: I?m running in USS (with XPLINK) and I need to call > > several System services that are known to not support AMODE64, in my case > > SWAREQ and OUTADD. > > :>I know that I could write a AMODE31 load module, put it in a MVS load > > library, load it with the C function fetch() (which supports AMODE > > switching) and jump right into the module. > > :>But I?d like to remain in USS only. So?. Is it possible to do an > > ?AMODE-switch? in pure assembler without using some load modules from the > > MVS world? I?ve read some manuals over the weekend but I?m more confused > > than I was before reading the manuals (even XPLINK is new to me and the > > manuals are pretty confusing)?. > > -- > > Binyamin Dissen <bdis...@dissensoftware.com> > > http://www.dissensoftware.com > > Director, Dissen Software, Bar & Grill - Israel -- Don Poitras - SAS Development - SAS Institute Inc. - SAS Campus Drive sas...@sas.com (919) 531-5637 Cary, NC 27513 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
