Re: TCBJLB doesn't point to a DCB
Confusion seems rampant. Please post the hexadecimal display of the first 48 (decimal 48, or hex '30') bytes of the TCB in question. Then post the same number of bytes at the beginning of the DCB in question. Bill Fairchild Franklin, TN - Original Message - From: Shmuel Metz (Seymour J.) shmuel+ibm-m...@patriot.net To: IBM-MAIN@LISTSERV.UA.EDU Sent: Friday, November 29, 2013 3:55:40 PM Subject: Re: TCBJLB doesn't point to a DCB In 5737414652770988.wa.woodagozemail.com...@listserv.ua.edu, on 11/29/2013 at 11:25 AM, Andy Wood woo...@ozemail.com.au said: Why would you expect a TCB to match the DCB DSECT? Clearly, at that point he is talking about TCB+X'28, not DCB+X'28'. Whoops! That would be a 24-bit address, not a 31-bit address, and bits 0-7 should be zeroed. Which still leaves the question of whether DESERVE will make a special case of the linklist DCB. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
I was confused by the documentation DCB= is the address where the DCB resides so Instead of coding MVC WSDCB,TCBJLB DCB= is a parm on the DESERV DCB=WSDCB, I coded L RX,TCBJLB DCB=(RX), That worked When the TASK/STEP/JOB is specified I get X'05' for both BLDL Or DESERV for the library is found in When its in the LINKLIST I get a X'01' correctly so indicating linklist For both BLDL/DESERV -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of DASDBILL2 Sent: Sunday, December 01, 2013 2:10 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: TCBJLB doesn't point to a DCB Confusion seems rampant. Please post the hexadecimal display of the first 48 (decimal 48, or hex '30') bytes of the TCB in question. Then post the same number of bytes at the beginning of the DCB in question. Bill Fairchild Franklin, TN - Original Message - From: Shmuel Metz (Seymour J.) shmuel+ibm-m...@patriot.net To: IBM-MAIN@LISTSERV.UA.EDU Sent: Friday, November 29, 2013 3:55:40 PM Subject: Re: TCBJLB doesn't point to a DCB In 5737414652770988.wa.woodagozemail.com...@listserv.ua.edu, on 11/29/2013 at 11:25 AM, Andy Wood woo...@ozemail.com.au said: Why would you expect a TCB to match the DCB DSECT? Clearly, at that point he is talking about TCB+X'28, not DCB+X'28'. Whoops! That would be a 24-bit address, not a 31-bit address, and bits 0-7 should be zeroed. Which still leaves the question of whether DESERVE will make a special case of the linklist DCB. -- 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
Re: TCBJLB doesn't point to a DCB
At 14:23 -0500 on 12/01/2013, MichealButz wrote about Re: TCBJLB doesn't point to a DCB: I was confused by the documentation DCB= is the address where the DCB resides so Instead of coding MVC WSDCB,TCBJLB DCB= is a parm on the DESERV DCB=WSDCB, I coded L RX,TCBJLB DCB=(RX), That worked Your problem with DCB=WASDCB is that says the DCB is at WASDCB not that the address of the DCB is in WASDCB. I do not know of a way of saying Look at this Location for a pointer to the DCB which is what you were trying to do (otherwise you could have just done DCB=TCBJLB). OTOH: I think same macros can do this look here by coding something like DCB=(*,WASDCB) or that might be some other type of reference. DCB=(RX) says the DCB's address is in RX. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
The documentation says the TCBJLB points to a DCB of the first library searched for a LOAD module for a program running under that task If it says exactly that with no qualification elsewhere, it could be clarified to say when not 0. Also, the DCB may represent a concatenation not an individual library. It is true that that will be the first library (or libraries) searched, when a usable copy is not found already-loaded. I have looked at various TCB's PSATOLD ASXBFTCB and if that address were a DCB at offset X'28' there would be a CL8 DDname various TCB's PSATOLD ASXBFTCB is not something that makes sense to me. As others have mentioned, it is untrue that DCB offset x'28' will ever have a DDNAME if it is opened. And any joblib/steplib/tasklib will be open (and better stay open). Are you aware that ASXBFTCB is not a program task? It is a system task (the RCT task). It will always have a zero TCBJLB as will some of the other early-in-address space tasks (as no joblib/steplib could yet have been defined, and no tasklib is used) such as the dump task. TCBJLB will be 0 when there is no joblib/steplib/tasklib. Peter Relson z/OS Core Technology Design -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
TCBJLB doesn't point to a DCB
The documentation says the TCBJLB points to a DCB of the first library searched for a LOAD module for a program running under that task I have looked at various TCB's PSATOLD ASXBFTCB and if that address were a DCB at offset X'28' there would be a CL8 DDname Thanks -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
Can I use what's pointed to by TCBJLB as a param for DESERV quite frankly the TCB's I have looked at the 4 byte field at offset X'28' from the TCB doesn't look like a address Sent from my iPhone On Nov 29, 2013, at 10:38 AM, Rob Scott rsc...@rocketsoftware.com wrote: The DCB foundation is a different format before and after OPEN and the DCBDDNAM (and other fields) are overlaid by post-OPEN fields - for example DCBTIOT Rob Scott Lead Developer Rocket Software 77 Fourth Avenue . Suite 100 . Waltham . MA 02451-1468 . USA Tel: +1.781.684.2305 Email: rsc...@rs.com Web: www.rocketsoftware.com -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of MichealButz Sent: 29 November 2013 15:26 To: IBM-MAIN@LISTSERV.UA.EDU Subject: TCBJLB doesn't point to a DCB The documentation says the TCBJLB points to a DCB of the first library searched for a LOAD module for a program running under that task I have looked at various TCB's PSATOLD ASXBFTCB and if that address were a DCB at offset X'28' there would be a CL8 DDname Thanks -- 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
Re: TCBJLB doesn't point to a DCB
quite frankly the TCB's I have looked at the 4 byte field at offset X'28' from the TCB doesn't look like a address Post-OPEN DCBs do NOT have an address at offset x'28' - it contains the DCBTIOT field and DCBMACRF Rob Scott Lead Developer Rocket Software 77 Fourth Avenue . Suite 100 . Waltham . MA 02451-1468 . USA Tel: +1.781.684.2305 Email: rsc...@rs.com Web: www.rocketsoftware.com -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Micheal Butz Sent: 29 November 2013 15:46 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: TCBJLB doesn't point to a DCB Can I use what's pointed to by TCBJLB as a param for DESERV quite frankly the TCB's I have looked at the 4 byte field at offset X'28' from the TCB doesn't look like a address Sent from my iPhone On Nov 29, 2013, at 10:38 AM, Rob Scott rsc...@rocketsoftware.com wrote: The DCB foundation is a different format before and after OPEN and the DCBDDNAM (and other fields) are overlaid by post-OPEN fields - for example DCBTIOT Rob Scott Lead Developer Rocket Software 77 Fourth Avenue . Suite 100 . Waltham . MA 02451-1468 . USA Tel: +1.781.684.2305 Email: rsc...@rs.com Web: www.rocketsoftware.com -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of MichealButz Sent: 29 November 2013 15:26 To: IBM-MAIN@LISTSERV.UA.EDU Subject: TCBJLB doesn't point to a DCB The documentation says the TCBJLB points to a DCB of the first library searched for a LOAD module for a program running under that task I have looked at various TCB's PSATOLD ASXBFTCB and if that address were a DCB at offset X'28' there would be a CL8 DDname Thanks -- 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 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
In !!AAAYAJXIDufoOyhGhgKtFLrs5tbCgAAAEERlz2jvBKRHoxzeV+FfuzABAA==@optonline.net, on 11/29/2013 at 10:26 AM, MichealButz michealb...@optonline.net said: The documentation says the TCBJLB points to a DCB of the first library searched for a LOAD module for a program running under that task I have looked at various TCB's PSATOLD ASXBFTCB and if that address were a DCB at offset X'28' there would be a CL8 DDname No; you have to open a DCB before you use it as a tasklib, so the relevant layout is that for an open DCB, not that for a closed DCB. -- Shmuel (Seymour J.) Metz, SysProg and JOAT ISO position; see http://patriot.net/~shmuel/resume/brief.html We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
On Fri, 29 Nov 2013 11:32:45 -0500, Shmuel Metz (Seymour J.) shmuel+ibm-m...@patriot.net wrote: In 0717adf1-8fde-41db-940d-77a882817...@optonline.net, on 11/29/2013 at 10:45 AM, Micheal Butz michealb...@optonline.net said: Can I use what's pointed to by TCBJLB as a param for DESERV ObFoma Yes. quite frankly the TCB's I have looked at the 4 byte field at offset X'28' from the TCB doesn't look like a address Why would you expect it to? Look at your DCBD macro expansion. Why would you expect a TCB to match the DCB DSECT? Clearly, at that point he is talking about TCB+X'28, not DCB+X'28'. I'm too lazy to check if that is a 4 byte address though, and not one of the three byte relics with something else in the top byte. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
On 11/29/2013 10:26 AM, MichealButz wrote: The documentation says the TCBJLB points to a DCB of the first library searched for a LOAD module for a program running under that task Can you provide a reference - the statement may be true in some limited context. But for tasklibs, the DCB is set for EXCP (or could be BPAM if user provided) and can support up to 16 libraries, with a total extent limit of 256. I have looked at various TCB's PSATOLD ASXBFTCB and if that address were a DCB at offset X'28' there would be a CL8 DDname I just tried this on my system. FTCB has 0 for TCBJLB (region control task). LTCB actually turned up some DCBs, all of which were open and pointed to an EXCP DCB. Re Shmuel's earlier comment - TCBJLB and DCBDDNAM coincidentally both have an offset of x'28'. Gerhard Postpischil Bradford, Vermont -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: TCBJLB doesn't point to a DCB
In 5737414652770988.wa.woodagozemail.com...@listserv.ua.edu, on 11/29/2013 at 11:25 AM, Andy Wood woo...@ozemail.com.au said: Why would you expect a TCB to match the DCB DSECT? Clearly, at that point he is talking about TCB+X'28, not DCB+X'28'. Whoops! That would be a 24-bit address, not a 31-bit address, and bits 0-7 should be zeroed. Which still leaves the question of whether DESERVE will make a special case of the linklist DCB. -- Shmuel (Seymour J.) Metz, SysProg and JOAT ISO position; see http://patriot.net/~shmuel/resume/brief.html We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
