been described, ALET=1 in AR
mode works for that case as long as your PC routine is defined properly..
If you need the home space (for example to examine the current TCB), then
ALET=2 is appropriate to use. If you were to switch to home ASC mode to
look at this, your code would have
to understand home address space inst and data fetched from
:home
:
:
:Sent from my iPhone
:
:On Jun 14, 2011, at 7:59 AM, Rob Scott rsc...@rocketsoftware.com
:wrote:
:
: Micheal,
:
: Home ASC mode means that data and instruction fetch use the home
: address space.
:
: Home ASC mode
from my iPhone
:
:On Jun 14, 2011, at 7:59 AM, Rob Scott rsc...@rocketsoftware.com
:wrote:
:
: Micheal,
:
: Home ASC mode means that data and instruction fetch use the home
: address space.
:
: Home ASC mode is normally only used by low-level z/OS components -
: why do you need to be in HOME mode
from my iPhone : :On Jun 14, 2011, at 7:59
AM, Rob Scott rsc...@rocketsoftware.com
:wrote:
:
: Micheal,
:
: Home ASC mode means that data and instruction fetch use the home
: address space.
:
: Home ASC mode is normally only used by low-level z/OS components -
: why do you need
The Principles of Operation is very clear on the characteristics of where
instructions and data are fetched for all of the ASC modes.
Instructions are fetched ffrom home, data from home.
Peter Relson
z/OS Core Technology Design
On Wed, Jun 15, 2011 at 6:50 AM, Micheal Butz michealb...@optonline.netwrote:
What if you Have a ss pc rtn and want to access data and inst from the
program that issued the ss pc rtn
That only takes a little bit of design forethought. Home-space ASC mode is
probably the last thing you should
: :wrote:
: :
: : Micheal,
: :
: : Home ASC mode means that data and instruction fetch use the home
: : address space.
: :
: : Home ASC mode is normally only used by low-level z/OS components -
: : why do you need to be in HOME mode ?
: :
: :
: :
: : Rob Scott
: : Lead Developer
: : Rocket Software
Hi
Would anyone know the charcteristocs of being in HOME ASC mode
E.G. If I issue a number of space swiching PC and do a SAC 768 would
Intruction and data fetch refer to the orignal Address Space
Sent from my iPhone
Micheal,
Home ASC mode means that data and instruction fetch use the home address space.
Home ASC mode is normally only used by low-level z/OS components - why do you
need to be in HOME mode ?
Rob Scott
Lead Developer
Rocket Software
275 Grove Street * Newton, MA 02466-2272 * USA
Tel
Rob
I like you work for a vendor
Just want to understand home address space inst and data fetched from
home
Sent from my iPhone
On Jun 14, 2011, at 7:59 AM, Rob Scott rsc...@rocketsoftware.com
wrote:
Micheal,
Home ASC mode means that data and instruction fetch use the home
address
-
:From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu]
On Behalf Of Binyamin
:Dissen
:Sent: Saturday, February 19, 2011 1:54 PM
:To: IBM-MAIN@bama.ua.edu
:Subject: Re: ASC. Mode
:
:And in HOME mode the instructions are fetched from the HOME
address space. In
:all other cases
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
Micheal Butz
Sent: Sunday, February 20, 2011 9:14 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
Hi
Would you then what are the bit values
For bit 16 17 of the PSW for the different modes
Bits
is the characteristic of HOME mode
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
Kristine
Harper
Sent: Sunday, February 20, 2011 12:16 PM
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
ModePSW Bits 16 and 17
Home
Of
michealbutz
Sent: 20 February 2011 18:16
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
One more question maybe I don't get it
Primary mode is the normal mode problem programs runs
Secondary mode is When you Issue lets a SSAR and issue MVCP MVCS instruction
AR mode well...when
it right
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
Rob Scott
Sent: Sunday, February 20, 2011 6:16 PM
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
Home space mode exists for the very small minority of cases where instruction
fetch
On 2/20/2011 3:45 PM, michealbutz wrote:
The only case I case I can think of were HASN |= PASN |= SASN is Were a SRB
issues a space
switching PC
The most common occurrence is when a program issues a PC-ss to a routine that
issues another PC-ss. It happens all the time.
--
Edward E Jaffe
On Sun, 20 Feb 2011 18:45:53 -0500 michealbutz michealb...@optonline.net
wrote:
:The only case I case I can think of were HASN |= PASN |= SASN is Were a SRB
issues a space
:switching PC
Nothing special about an SRB issuing a PC.
:Or Does a SAC 512
Does not change any of {PASN,SASN,HASN}
, 18 Feb 2011 14:58:57 -0500 Kristine Harper kristine.har...@neon.com
wrote:
:ASC mode is determined by PSW bits 16 and 17, and tells the system where to
find the referenced data (the data referenced by the address in the GPRs). When
ASC mode is secondary, SAC is 256 and you are in cross memory
-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
ASC mode is determined by PSW bits 16 and 17, and tells the system where to
find the
referenced data (the data referenced by the address in the GPRs). When ASC mode
is
secondary, SAC is 256 and you are in cross memory mode. And the data resides
Home mode is SAC 0 ???
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
Binyamin
Dissen
Sent: Saturday, February 19, 2011 1:54 PM
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
And in HOME mode the instructions are fetched from the HOME
Of Binyamin
:Dissen
:Sent: Saturday, February 19, 2011 1:54 PM
:To: IBM-MAIN@bama.ua.edu
:Subject: Re: ASC. Mode
:
:And in HOME mode the instructions are fetched from the HOME address space. In
:all other cases they are fetched from the PRIMARY address space (though when
:XMS came out when
Rob gets the 'Understatement of the Month' award for this one g
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
Rob Scott
Sent: Thursday, February 17, 2011 5:48 PM
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
There is a very
ASC mode is determined by PSW bits 16 and 17, and tells the system where to
find the referenced data (the data referenced by the address in the GPRs). When
ASC mode is secondary, SAC is 256 and you are in cross memory mode. And the
data resides in the secondary address space.
Kristine Harper
-Original Message-
From: IBM Mainframe Discussion List
[mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Kristine Harper
Sent: Friday, February 18, 2011 1:59 PM
To: IBM-MAIN@bama.ua.edu
Subject: Re: ASC. Mode
ASC mode is determined by PSW bits 16 and 17, and tells the
system where
===
From:
McKown, John john.mck...@healthmarkets.com
To:
IBM-MAIN@bama.ua.edu
Date:
02/18/2011 02:02 PM
Subject:
Re: ASC. Mode
Sent by:
IBM Mainframe Discussion List IBM-MAIN@bama.ua.edu
-Original Message-
From: IBM Mainframe Discussion List
[mailto:IBM-MAIN
On Fri, 18 Feb 2011 14:01:32 -0600, McKown, John wrote:
In today's z/OS environment, is there any reason to use SAC 512
instead of just using AR mode with an ALET?
SAC 512 is the instruction that puts you in AR mode.
--
Tom Marchant
Hi
I know ASC mode refers to the Set Address Space Control instruction
SAC. 0. Primary
SAC 512 AR. Mode
But what does it mean
ASC mode: Primary or Secondry
In the IBM manuals
Sent from my iPhone
--
For IBM-MAIN
On Thu, 17 Feb 2011 15:35:14 -0500 Micheal Butz michealb...@optonline.net
wrote:
:Hi
:
:I know ASC mode refers to the Set Address Space Control instruction
:
:SAC. 0. Primary
:
:SAC 512 AR. Mode
:
:But what does it mean
:
:ASC mode: Primary or Secondry
:
:In the IBM manuals
Four possible ASC's
Web: www.rocketsoftware.com
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
Micheal Butz
Sent: 17 February 2011 20:35
To: IBM-MAIN@bama.ua.edu
Subject: ASC. Mode
Hi
I know ASC mode refers to the Set Address Space Control instruction
In [EMAIL PROTECTED], on
01/25/2007
at 06:22 AM, James Cotter [EMAIL PROTECTED] said:
For a space-switching PC routine (PC-ss), I am aware of the
requirement for the service providers' address space to be
non-swappable. However, when in AR ASC mode and accessing data via an
AR, is there any
GUPI for ASID 1. Not an intended interface for other ASIDs.
I don't know why it says that. My best guess would be
that maybe it was intended to deter someone from considering
fetching ASSBSTKN from an ASSB to which they did not have
proper serialization.
Rob Scott found an old append of mine
On 25 Jan 2007 15:17:44 -0800, in bit.listserv.ibm-main you wrote:
Peter Relson said this a few years back on IBM-MAIN :
There is no intended programming interface for obtaining the STOKEN of
a given address space. If the owner of that space wants you poking
around in his storage, then it is up
Street
Newton, MA 02466
617-614-2305
[EMAIL PROTECTED]
http://www.rs.com/portfolio/mxi_g2
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Clark Morris
Sent: 26 January 2007 08:18
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: Cross Memory and AR ASC Mode
Clark asks
What are the security implications of allowing uninvited snooping?
It depends on who is doing the snooping and why they are doing it. All
of the major commercial monitoring products and even the non-commercial
ones need access to other address spaces from time to time. The only
way
Craddock, Chris wrote:
Ed said
The main reason for using ASCBINTS is that it is accessible from the
address space that schedules the SRB. The TTOKEN of the cross memory
owning TCB isn't. That TCB and its TTOKEN reside in the SRB schedulee's
private area, thus creating a chicken and egg
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Peter Relson
Sent: Friday, January 26, 2007 5:36 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: Cross Memory and AR ASC Mode
/snip/
Jeffrey Smith mentioned LASP: I hope it isn't surprising
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Clark Morris
Sent: Friday, January 26, 2007 6:18 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: Cross Memory and AR ASC Mode
/snip/
What are the security implications of allowing uninvited
On Jan 26, 2007, at 9:24 AM, Craddock, Chris wrote:
SNIP--
Omegamon, like all of the other commercial tools, follows the security
rules. It isn't a security risk unless your shop has sloppy
administration of security policy.
I guess I would agree with you
Newton, MA 02466
617-614-2305
[EMAIL PROTECTED]
http://www.rs.com/portfolio/mxi_g2
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of James Cotter
Sent: 25 January 2007 01:23
To: IBM-MAIN@BAMA.UA.EDU
Subject: Cross Memory and AR ASC Mode
For a space-switching PC routine (PC-ss), I am aware of the
requirement
for the service providers' address space to be non-swappable. However,
when in AR ASC mode and accessing data via an AR, is there any
requirement
for the target address space to be non-swappable? I have looked
through
, MA 02466
617-614-2305
[EMAIL PROTECTED]
http://www.rs.com/portfolio/mxi_g2
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Craddock, Chris
Sent: 25 January 2007 12:28
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: Cross Memory and AR ASC Mode
Rob asks...
I have often wondered why ASSBSTKN is not GUPI as the values are
guaranteed to be unique between IPLs. I remember asking IBM many years
ago and was told that it just wasn't, OK.
Can you say initiators boys and girls?
The STOKEN for an address space does indeed remain unique for
Rob Scott wrote:
As you pointed out, the SRB (once inside) can research the
characteristics of the address space to see if things are as expected or
not - so any SRB likely to come up against inits can have code to cater
for the occasion.
ASCBINTS can be used as a job instance number in an
IBM Mainframe Discussion List IBM-MAIN@BAMA.UA.EDU wrote on 01/25/2007
01:35:05 PM:
Rob asks...
I have often wondered why ASSBSTKN is not GUPI as the values are
guaranteed to be unique between IPLs. I remember asking IBM many years
ago and was told that it just wasn't, OK.
From the
[mailto:[EMAIL PROTECTED] On
Behalf Of Jim Mulder
Sent: 25 January 2007 16:09
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: Cross Memory and AR ASC Mode
IBM Mainframe Discussion List IBM-MAIN@BAMA.UA.EDU wrote on 01/25/2007
01:35:05 PM:
Rob asks...
I have often wondered why ASSBSTKN is not GUPI
Jim said
You could obtain and save the TTOKEN of the TCB pointed to by
ASCBXTCB.
At some point in the future, if the TTOKEN of the TCB pointed to by
ASCBXTCB matches the TTOKEN you save previously, then it is still the
same job step (because the TCB pointed to by ASCBXTCB terminates when
a
Street
Newton, MA 02466
617-614-2305
[EMAIL PROTECTED]
http://www.rs.com/portfolio/mxi_g2
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Jim Mulder
Sent: 25 January 2007 17:43
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: Cross Memory and AR ASC Mode
Craddock, Chris wrote:
Jim said
You could obtain and save the TTOKEN of the TCB pointed to by
ASCBXTCB.
At some point in the future, if the TTOKEN of the TCB pointed to by
ASCBXTCB matches the TTOKEN you save previously, then it is still the
same job step (because the TCB pointed
Ed said
The main reason for using ASCBINTS is that it is accessible from the
address space that schedules the SRB. The TTOKEN of the cross memory
owning TCB isn't. That TCB and its TTOKEN reside in the SRB
schedulee's
private area, thus creating a chicken and egg problem.
True, but Jim's
For a space-switching PC routine (PC-ss), I am aware of the requirement for the
service providers' address space to be non-swappable. However, when in AR ASC
mode and accessing data via an AR, is there any requirement for the target
address space to be non-swappable? I have looked through the z
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