To determine storage key/fetch protection:
1) Initialize (or reinitialize) your dump with the MACHINE option.
2) When asked to use summary dump info, specify NO (for full init) if
prompted.
3) In option 1 while browsing storage Locate the area of storage: (6dd0
is the example used here)
type in on the command line "IPCS LIST 6dd0."
4) The following is displayed:
LIST 6DD0. ASID(X'0243') LENGTH(X'04') AREA
ASID(X'0243') ADDRESS(6DD0.) KEY(88) <= First nibble is
storage key, second nibble is fetch protect bit
00006DD0. 00006DD0
Hope this helps.
Al Slovacek
Serena Software
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Al Chu
Sent: Friday, June 24, 2005 2:05 AM
To: [email protected]
Subject: How to find fetch protected area
Hi experts,
I am a beginner of dump reading and have a simple S0C4. Could anyone
please guide me.
The PSW looks 079D0000 9B76D1B4. The failing instruction is L
R15,X'0C'(R15). The value of R15 is 000128FC.
The output of VERBX VSMDATA shows;
DATA FOR SUBPOOL 251, KEY 8 FOLLOWS:
-- DQE LISTING (VIRTUAL BELOW, REAL BELOW)
DQE: ADDR 00012000 SIZE 2000
FQE: ADDR 00012000 SIZE 870
DQE: ADDR 0001B000 SIZE 2000
FQE: ADDR 0001B000 SIZE 480
So my analysis is that a pgm running with storage key 9 tries to access
key 8 fetch protected storage and the access is denied.
Am I correct ?
How do I know the area is fetch protected ? Is there any IPCS command to
tell fetch protected or not?
Thanks in advance.
Al Chu
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