LE does not always do the *** bit. Here is the same display from a
subsequent S0C1. Tends to disprove the "all zeros" theory.

Machine State:

  ILC..... 0002    Interruption Code..... 0001

  PSW..... 078D1400 95E8BE6A

  GPR0..... 00000000_00000000  GPR1..... 00000000_15E67138  GPR2.....
00000000_15E6B3C4  GPR3..... 00000000_15E6B6E8
  GPR4..... 00000000_1560D7F0  GPR5..... 00000000_15E69768  GPR6.....
00000000_1560E538  GPR7..... 00000000_15E6BA28
  GPR8..... 00000000_15E6BA10  GPR9..... 00000000_15E6BA0C  GPR10....
00000000_15E6BA08  GPR11.... 00000000_956D9A40
  GPR12.... 00000000_15657188  GPR13.... 00000000_15E6B2F8  GPR14....
00000000_9560D86C  GPR15.... 00000000_15E8BE58

Charles


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of Charles Mills
Sent: Thursday, November 1, 2018 6:48 AM
To: [email protected]
Subject: Re: Help with diagnosing S0C4-038

Thanks @Peter. They're more likely to answer you than me.

Charles


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of Peter Relson
Sent: Thursday, November 1, 2018 6:10 AM
To: [email protected]
Subject: Re: Help with diagnosing S0C4-038

I didn't look it up, but I don't think you can get 0C4-03B if in AMODE 31 
unless you're dealing with some instruction that is not sensitive to the 
AMODE when deciding which bits of a register or control area to use for 
addressing (and I don't know if there are any such instructions, but I 
haven't scoured the architecture). 

>From what is shown, the instruction is a LMH (hence not special).

I'll ask the LE folks "why the asterisks". Might it mean "all 0"? But even 
if so, why bother not just displaying? If they have room in the display 
for 64-bit regs, why not just display them? Perhaps (for some strange 
reason) they don't capture 64-bit regs for AMODE 31 events (not that I'd 
like that answer) and the asterisks indicate "data not available".

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