Right.
A wild branch could do anything, but I think the damage from key 0 is more
likely than that you happen to hit some privileged instruction.
I think you misunderstood my two bullets. The first was the potential damage
from supervisor state. The second was potential damage from key 0. Much
On Fri, Jun 07, 2019 at 08:57:38AM -0500, John McKown wrote:
> I am not finding this. I want to change the PKM for my running, APF
> authorized, program to include key 0. Why? So that I can switch in and out
> of key 0 using an SPKA instruction rather than MODESET. But mainly so that
> I can use
On Mon, 10 Jun 2019 13:57:12 -0700 Charles Mills wrote:
:>> Key0 is much much more dangerous than supervisor state (IMHO)
:>Interesting. I never thought of that, but I agree. Which is the more likely
:>error?
:>- You accidentally code some privileged instruction that you did not intend?
> Key0 is much much more dangerous than supervisor state (IMHO)
Interesting. I never thought of that, but I agree. Which is the more likely
error?
- You accidentally code some privileged instruction that you did not intend?
- You code the wrong register number in an instruction, or destroy or
On Mon, Jun 10, 2019 at 10:48 AM Ed Jaffe
wrote:
> On 6/10/2019 8:37 AM, Binyamin Dissen wrote:
> > On Mon, 10 Jun 2019 08:13:23 -0700 Ed Jaffe >
> > wrote:
> >
> > :>On 6/9/2019 11:47 PM, Binyamin Dissen wrote:
> > :>> Well, to do that he could encapsulate this code in a PC-CP with an
>
On 6/10/2019 8:37 AM, Binyamin Dissen wrote:
On Mon, 10 Jun 2019 08:13:23 -0700 Ed Jaffe
wrote:
:>On 6/9/2019 11:47 PM, Binyamin Dissen wrote:
:>> Well, to do that he could encapsulate this code in a PC-CP with an altered
:>> AKM.
:>Altered in what way?
ETDEF EKM=
Haha! That part is
On Mon, 10 Jun 2019 08:13:23 -0700 Ed Jaffe
wrote:
:>On 6/9/2019 11:47 PM, Binyamin Dissen wrote:
:>> Well, to do that he could encapsulate this code in a PC-CP with an altered
:>> AKM.
:>Altered in what way?
ETDEF EKM=
--
Binyamin Dissen
http://www.dissensoftware.com
Director, Dissen
On 6/9/2019 11:47 PM, Binyamin Dissen wrote:
Well, to do that he could encapsulate this code in a PC-CP with an altered
AKM.
Altered in what way?
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Edward E. Jaffe
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El Segundo, CA 90245
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On Mon, 10 Jun 2019 08:23:46 -0400 Peter Relson wrote:
:>Yes there's a way -- creating a PC routine that accomplishes doing so.
:>Nothing else is acceptable, although the literal answer would be "LCTL".
Will be reset after an interrupt. (At least that was an issue in the past)
--
Binyamin
On Mon, Jun 10, 2019 at 7:24 AM Peter Relson wrote:
> Yes there's a way -- creating a PC routine that accomplishes doing so.
> Nothing else is acceptable, although the literal answer would be "LCTL".
>
Thanks. I was hoping for a z/OS API. The closest I could find to subvert is
SYNCHX to set the
Yes there's a way -- creating a PC routine that accomplishes doing so.
Nothing else is acceptable, although the literal answer would be "LCTL".
Peter Relson
z/OS Core Technology Design
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For IBM-MAIN subscribe / signoff /
On Sun, 9 Jun 2019 20:15:40 -0400 Rob Schramm wrote:
:>I suspect John's answer will be
:>1) because it's cool to try new things
Well, to do that he could encapsulate this code in a PC-CP with an altered
AKM.
:>2) because I want to limit the destruction if it goes wrong.
Key0 is much much
I suspect John's answer will be
1) because it's cool to try new things
2) because I want to limit the destruction if it goes wrong.
Waiting for the real answer,
Rob
On Sun, Jun 9, 2019, 6:22 PM Binyamin Dissen
wrote:
> On Fri, 7 Jun 2019 08:57:38 -0500 John McKown <
>
On Fri, 7 Jun 2019 08:57:38 -0500 John McKown
wrote:
:>I am not finding this. I want to change the PKM for my running, APF
:>authorized, program to include key 0. Why? So that I can switch in and out
:>of key 0 using an SPKA instruction rather than MODESET. But mainly so that
:>I can use the
I am not finding this. I want to change the PKM for my running, APF
authorized, program to include key 0. Why? So that I can switch in and out
of key 0 using an SPKA instruction rather than MODESET. But mainly so that
I can use the MVCSK and MVCDK instructions to read & update key 0, fetch
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