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| Author |
SWAREQ - Getting S0C4 when using SWBLKPTR
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| Tim Coffey 2004-03-19, 8:28 pm |
| I am using SWAREQ in unauthorized mode. When I try to access the
memory pointed to by SWBLKPTR I get a S0C4. What gives? What's the
point in having an unauthorized mode when the results are unusable?
Code:
ST R2,SWEPAPTR INITIALIZE EPA POINTER
USING ZB505,R2 ESTABLISH ADDRESSABILITY TO
EPA
XC SWAEPAX,SWAEPAX INITIALIZE THE EPA
ST R1,SWVAFW MV SVA OF JFCB INTO EPA
SWAREQ FCODE=RL,EPA=SWEPAPTR,MF=(E,SWAPARMS),UN
AUTH=YES
LR R1,R15
DROP R2
*
SWEPAPTR DS F
SWAPARMS SWAREQ MF=L
IEFZB505 LOCEPAX=YES
CVT DSECT=YES
IEFJESCT
IEFTIOT1
IEFJFCBN
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| Binyamin Dissen 2004-03-19, 8:28 pm |
| On 30 Dec 2003 06:54:57 -0800 Timothy_S_Coffey@bankone.com (Tim Coffey) wrote:
:>I am using SWAREQ in unauthorized mode. When I try to access the
:>memory pointed to by SWBLKPTR I get a S0C4. What gives? What's the
:>point in having an unauthorized mode when the results are unusable?
Amode?
--
Binyamin Dissen <bdissen@dissensoftware.com>
http://www.dissensoftware.com
Director, Dissen Software, Bar & Grill - Israel
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| Tim Coffey 2004-03-19, 8:28 pm |
| Binyamin Dissen <postingid@dissensoftware.com> wrote in message news:<4183vv02el14vvdcsr08i92ol5r9jsgqr8@4ax.com>...
> On 30 Dec 2003 06:54:57 -0800 Timothy_S_Coffey@bankone.com (Tim Coffey) wrote:
>
> :>I am using SWAREQ in unauthorized mode. When I try to access the
> :>memory pointed to by SWBLKPTR I get a S0C4. What gives? What's the
> :>point in having an unauthorized mode when the results are unusable?
>
> Amode?
It's AMODE(31). Is the leading byte of the SWBLKPTR perhaps not part
of the address (maybe it's a 24-bit address). I'll run a quick test
for that.
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| Colin Campbell 2004-03-19, 8:28 pm |
| Tim Coffey wrote:
> I am using SWAREQ in unauthorized mode. When I try to access the
> memory pointed to by SWBLKPTR I get a S0C4. What gives? What's the
> point in having an unauthorized mode when the results are unusable?
>
> Code:
>
> ST R2,SWEPAPTR INITIALIZE EPA POINTER
> USING ZB505,R2 ESTABLISH ADDRESSABILITY TO
> EPA
> XC SWAEPAX,SWAEPAX INITIALIZE THE EPA
> ST R1,SWVAFW MV SVA OF JFCB INTO EPA
> SWAREQ FCODE=RL,EPA=SWEPAPTR,MF=(E,SWAPARMS),UN
AUTH=YES
> LR R1,R15
> DROP R2
> *
> SWEPAPTR DS F
> SWAPARMS SWAREQ MF=L
> IEFZB505 LOCEPAX=YES
> CVT DSECT=YES
> IEFJESCT
> IEFTIOT1
> IEFJFCBN
I have a possibility for you to look at (no experience, and I haven't
tried to code the interface).
The example in the book
OS/390: MVS Programming: Authorized Assembler Services Guide
shows
SWAREQ FCODE=RL,EPA=SWEPAPTR,MF=(E,SWAPARMS) LOCATE THE JFCB
L 7,SWBLKPTR SET THE POINTER TO THE JFCB
USING INFMJFCB,7 ESTABLISH ADDRESSABILITY TO JFCB
Your posted code is unclear in the area of what you do after return, but
if you are trying to use the R15 contents as the pointer to the JFCB, I
believe that would cause you grief, because it is the Return Code.
The Guide also says you need to use IEFQMIDS to map to SWA Block IDs,
which is not in your posted code.
Everything else looks exactly like the manuals say it should be.
Good luck!
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| Pierre Fichaud 2004-03-19, 8:28 pm |
| How about STCM R1,7,SWVA?
PF.
Tim Coffey wrote:
> I am using SWAREQ in unauthorized mode. When I try to access the
> memory pointed to by SWBLKPTR I get a S0C4. What gives? What's the
> point in having an unauthorized mode when the results are unusable?
>
> Code:
>
> ST R2,SWEPAPTR INITIALIZE EPA POINTER
> USING ZB505,R2 ESTABLISH ADDRESSABILITY TO
> EPA
> XC SWAEPAX,SWAEPAX INITIALIZE THE EPA
> ST R1,SWVAFW MV SVA OF JFCB INTO EPA
> SWAREQ FCODE=RL,EPA=SWEPAPTR,MF=(E,SWAPARMS),UN
AUTH=YES
> LR R1,R15
> DROP R2
> *
> SWEPAPTR DS F
> SWAPARMS SWAREQ MF=L
> IEFZB505 LOCEPAX=YES
> CVT DSECT=YES
> IEFJESCT
> IEFTIOT1
> IEFJFCBN
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| Mark Dixon 2004-03-19, 8:28 pm |
| In your first two statements Tim:
ST R2,SWEPAPTR INITIALIZE EPA POINTER
USING ZB505,R2 ESTABLISH ADDRESSABILITY TO EPA
Are you sure you want to Store R2 in SWEPAPTR before setting up EPA
addressability? Perhaps you should be loading R2 from SWEPAPTR instead?
Cheers, Mark Dixon
em dixon at anysize dot com.
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