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  1.  Home
  2. RPG400-L
  3. October 2000

RE: RPG400-L Digest V2 #357

I am mystified why you started to chase the address of the PEP stack frame
instead of the address of the variable.  I would have searched for
F9BAF3B174017730 instead of C8C645783FFFBC20.  Still, looks to me like you
have a good solution - low order byte of the address returned by addr() will
give alignment.

Now, why did you want to know that?  :)

Richard Jackson
mailto:richardjackson@richardjackson.net
http://www.richardjacksonltd.com
Voice: 1 (303) 808-8058
Fax:   1 (303) 663-4325

-|-----Original Message-----
-|From: owner-rpg400-l@midrange.com [mailto:owner-rpg400-l@midrange.com]On
-|Behalf Of Peter Dow
-|Sent: Wednesday, October 11, 2000 11:32 AM
-|To: RPG400-L@midrange.com
-|Subject: Re: RPG400-L Digest V2 #357
-|
-|
-|Thanks Richard, Martin.
-|
-|When I used debug to add a watch I got:
-|
-|Num      Variable                 Address              Length
-|1        $PGM                     F9BAF3B174017730     10
-|
-|At the same time I used the following command in debug:
-|
-|%ADDR($PGM) = SPP:F9BAF3B174017730
-|
-|Then I did the DMPJOBINT followed by PRTINTDTA and found what I assume are
-|the stack entries for the program I was debugging (MOUSER):
-|
-|ISF ADDRESS   C8C645783F FFBAA0       TYPE MI PROC
-|    RESUMEPOINT     3A80CC5AED 001AE4     ENTRY@    3A80CC5AED 001940
-|     PROGRAM  MOUSER
-|     ENTRY    MOUSER + 000001A4
-|ISF ADDRESS   C8C645783F FFBC20       TYPE MI PEP
-|    RESUMEPOINT     3A80CC5AED 0018AC     ENTRY@    3A80CC5AED 001790
-|     PROGRAM  MOUSER
-|     ENTRY    _QRNP_PEP_MOUSER + 0000011C
-|
-|Scanning the dump output for C8C645783F FFBC20 I found (among
-|other things):
-|
-|ISF ADDRESS   C8C645783F FFBC20       TYPE MI PEP
-|    RESUMEPOINT     3A80CC5AED 0018AC     ENTRY@    3A80CC5AED 001790
-|     PROGRAM  MOUSER
-|     ENTRY    _QRNP_PEP_MOUSER + 0000011C
-|    GPR 0     ********** ******
-|    GPR 1     C8C645783F FFBC20
-|    GPR 2     ********** ******
-|    GPR 3     ********** ******
-|    GPR 4     ********** ******
-|    GPR 5     ********** ******
-|    GPR 6     ********** ******
-|    GPR 7     ********** ******
-|    GPR 8     ********** ******
-|    GPR 9     ********** ******
-|    GPR 10    ********** ******
-|    GPR 11    ********** ******
-|    GPR 12    ********** ******
-|    GPR 13    8000000000 000000
-|    GPR 14    C8C645783F 000080
-|    GPR 15    0000000000 0000F1
-|    GPR 16    0000000000 000080
-|    GPR 17    0000000000 0010AE
-|    GPR 18    C8C645783F FFCE60
-|    GPR 19    F4E2AB0C6B 000000
-|    GPR 20    8000000000 000000
-|    GPR 21    F9BAF3B174 017240 * (close to F9BAF3B174 017730)
-|    GPR 22    00000000C0 000000
-|    GPR 23    E5C6E167D5 001440
-|    GPR 24    E5C6E167D5 001420
-|    GPR 25    8000000000 000000
-|    GPR 26    F9BAF3B174 017240 * (close to F9BAF3B174 017730)
-|    GPR 27    220EB12D38 001200
-|    GPR 28    E001694C5E 0304C0
-|    GPR 29    C8C645783F FFBE20
-|    GPR 30    F9BAF3B174 017000 * (close to F9BAF3B174 017730)
-|    GPR 31    E5C6E167D5 001480
-|
-|     ADDRESS        LOCATION    OBJECT TEXT       SOURCE STATEMENT
-|3A80CC5AED 00189C     00010C    FA970002          STQ 20,0X0(23)
-|3A80CC5AED 0018A0     000110    62E30000          ORI 3,23,0
-|3A80CC5AED 0018A4     000114    63820000          ORI 2,28,0
-|3A80CC5AED 0018A8     000118    48000099          BL 0X98
-|3A80CC5AED 0018AC     00011C    EB010000          LD 24,0X0(1)
-|3A80CC5AED 0018B0     000120    8358FF8C          LWZ 26,0XFF8C(24)
-|3A80CC5AED 0018B4     000124    3B3C00A0          ADDI 25,28,160
-|3A80CC5AED 0018B8     000128    7FD9E088          TD 30,25,28
-|3A80CC5AED 0018BC     00012C    3ABC00A8          ADDI 21,28,168
-|3A80CC5AED 0018C0     000130    7FD5E088          TD 30,21,28
-|
-|I could keep going -- I found some references to F9BAF3B174017730, but
-|nothing conclusive. However, it does sort of look like %addr(variable) is
-|the address that we want to be aligned. I haven't heard anyone contradict
-|that. If true, you could programmtically determine if your data structures
-|are aligned.
-|
-|Peter Dow
-|Dow Software Services, Inc.
-|909 425-0194 voice
-|909 425-0196 fax
-|
-|
-|
-|
-|----- Original Message -----
-|From: "McCallion, Martin" <MccalliM@Midas-Kapiti.com>
-|To: <RPG400-L@midrange.com>
-|Sent: Wednesday, October 11, 2000 8:34 AM
-|Subject: RE: RPG400-L Digest V2 #357
-|
-|
-|> Peter Dow said:
-|> > > Where can I see the virtual address?
-|>
-|> Richard Jackson replied:
-|> > dump job internal.
-|>
-|> IIRC you can also see this in debug; certainly if you set a watch you
-|> see the address of the watched variable.  That sounds a lot easier to me
-|> :-)
-|>
-|> Cheers,
-|>
-|> Martin.
-|>
-|> --
-|> Martin McCallion
-|> Midas-Kapiti International
-|> Work:  mccallim@midas-kapiti.com
-|> Home: martin.mccallion@ukonline.co.uk
-|>
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