It's been on all the z machines. I don't remember which was the earliest machine. But I'm sure somebody does and will tell us.
On Wed, May 22, 2013 at 7:57 AM, Robin Atwood <[email protected]> wrote: > John - > That's very interesting to know, thanks a lot. Is that a comparatively > recent register? It would have been useful in the past! > > Cheers > -Robin > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of John McKown > Sent: 22 May 2013 20:38 > To: [email protected] > Subject: Re: Mysterious Abend 0C1 > > I didn't see mentioned, but if you ever think that the problem is due to a > "wild branch" of any sort, remember that the BEA Register contains the > address last successfully "branched from". It is in the SYSUDUMP under the > PRB of the program which was in execution. So I'd look at the instruction at > that address and see if it could cause execution to proceed to where the > S0C1 was reported. If so, you probably have your culprit. > > On Wed, May 22, 2013 at 7:28 AM, Tom Marchant <[email protected]> > wrote: >> On Wed, 22 May 2013 07:24:01 -0500, Tom Marchant > <[email protected]> wrote: >> >>>On Wed, 22 May 2013 19:20:29 +0800, Robin Atwood wrote: >>> >>>>Here is a puzzle. The program has taken an 0C1 half-way through an >>>>instruction. >>> >>>If the PSW that you listed is the correct PSW, the code you have shown >>>is not the correct code. You could not have received an operation >>>exception for trying to execute a X'5A' >>>opcode. In fact, unless you are on a _very_ old processor, the only >>>halfword that shows an invalid opcode is at 00008008. >>> >>>>It cannot have got there via the normal instruction sequence, so it >>>>must have been branched to. However, none of the registers have a >>>>value less than or equal to the PSW. >>> >>>You show registers 1, 2, 3, 5 and 6 as being zero. And have you >>>forgotten register 0? What about relative branches? >> >> Please disregard most of the preceding paragraph. Register zero and >> the registers containing zero are not important. Relative branches >> could still have been used. >> >>> >>>>This is compiled C code so no PC/PR >>>>instructions are involved, AFAIK. How could the PSW get to be where it > is? >>>>Absolute address X'A9E' is all zeros so we didn't go there. >>> >>>ITYM virtual address A9E, which would be the same as real address A9E. >>>Absolute address A9E is something altogether different and is not >>>relevant. >>> >>>-- >>>Tom Marchant >>> >>>> >>>> >>>> >>>> >>>>Using ASXB519 TCB: 007CC950 Abend Code: 0C1000 ILC: 00 Int: 04 >>>> >>>>PSW: 000180E100008000 Csect EP: >>>> >>>> >>>> >>>> R0 R1 R2 R3 R4 R5 R6 > R7 >>>> >>>>7FFFF000 00000000 00000000 00000000 00FD6D40 00000000 00000000 > 000A0000 >>>> >>>> R8 R9 R10 R11 R12 R13 R14 > R15 >>>> >>>>000140E1 000A0000 000150E1 000A0000 000160E1 000A0000 000170E1 > 000A0000 >>>> >>>> >>>> >>>>00007FF6 00000016 92D5 7055 MVI 85(7),X'D5' >>>> >>>>00007FFA 0000001A 91FF 7056 TM 86(7),X'FF' >>>> >>>>00007FFE 0000001E 4770 5A9E BC 7,2718(0,5) >>>> >>>>00008002 00000022 92D5 7056 MVI 86(7),X'D5' >>>> >>>>00008006 00000026 41A0 61C8 LA 10,456(0,6) >>> >>>---------------------------------------------------------------------- >>>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 > > > > -- > This is a test of the Emergency Broadcast System. If this had been an actual > emergency, do you really think we'd stick around to tell you? > > Maranatha! <>< > John McKown > > ---------------------------------------------------------------------- > 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 -- This is a test of the Emergency Broadcast System. If this had been an actual emergency, do you really think we'd stick around to tell you? Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
