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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
DLUBK
Cross Reference (Contains links to field and bit definitions)
DLUBK Prolog
NAME : HCPDLUBK
DESCRIPTION: Dynamic Load/Unload Block
STATUS : VM/ESA Version 2, Release 1.0
DSECT : DLUBK
FUNCTION : The Dynamic Load/Unload Block is used to control
activities in manipulating dynamically loaded modules.
LOCATED BY : SYSCM.SYSDLUBK
CREATED BY : HCPICLIN
DELETED BY : None.
REFERENCES : None.
SERIALIZED : The DLUBK is created during system initialization;
no further serialization is required.
The DLUCPXLK is acquired exclusive to serialize
CPXLOAD and CPXUNLOAD requests.
The DLUICLLK is used to serialize access to the
ICLBK chain.
If multiple locks are acquired, they must be acquired
in this order.
DLUCPXLK --> DLUICLLK
DLUBK Control Block Content
DLUBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure DLUBK Dynamic Load/Unload Block 0000 0 Dbl-Word 8 DLUCPXLK (3) Lock for synchronizing CPXLOAD and CPXUNLOAD activities 0018 24 Dbl-Word 8 DLUICLLK (3) Lock for serializing access to the ICLBK chain. 0030 48 Signed 4 DLUIDN ID number of last CPXLOAD command 0034 52 Address 4 DLUICL Address of 1st ICLBK on the ICLBK chain 0038 56 Address 4 DLULABKD Address of 1st LABK on the already-loaded chain 003C 60 Address 4 DLULABKC Address of LABK currently active being CPXLOADed. 0040 64 Address 4 DLUBITAC Address of bit map of pages that HCPPTSAC has given to us. 0044 68 Address 4 DLUBITUS Address of bit map of pages that we have used. 0048 72 Address 4 DLUBITNA Address of bit map of pages that are unavailable for some unknown reason, based on a non-zero return code from HCPPTVAF. 004C 76 Address 4 DLURLDQU Address of RLDBK chain of un- resolved external references 0050 80 Dbl-Word 8 DLU$END (0) The end
DLUBK Storage Layout
*** DLUBK - Dynamic Load/Unload Block * * +-------------------------------------------------------+ * 0 | | * = DLUCPXLK = * | | * +-------------------------------------------------------+ * 18 | | * = DLUICLLK = * | | * +---------------------------+---------------------------+ * 30 | DLUIDN | DLUICL | * +---------------------------+---------------------------+ * 38 | DLULABKD | DLULABKC | * +---------------------------+---------------------------+ * 40 | DLUBITAC | DLUBITUS | * +---------------------------+---------------------------+ * 48 | DLUBITNA | DLURLDQU | * +---------------------------+---------------------------+ * 50 | | * = DLU$END = * | | * +-------------------------------------------------------+ * *** DLUBK - Dynamic Load/Unload Block
DLUBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----DLU$END 0050
DLUBITAC 0040
DLUBITNA 0048
DLUBITUS 0044
DLUCPXLK 0000
DLUICL 0034
DLUICLLK 0018
DLUIDN 0030
DLULABKC 003C
DLULABKD 0038
DLURLDQU 004C
Last updated on 3 Aug 1999 at 11:52:17 EDT.
Copyright IBM Corporation, 1990, 1999