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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. |
ANCHSECT
Cross Reference (Contains links to field and bit definitions)
ANCHSECT Prolog
Name : ANCHTAB Description: Anchor Table DSECT : ANCHSECT Function : ANCHSECT defines the VSE anchor table. This DSECT is used by DMSDOS when a CDLOAD (SVC 65) is issued, and the specified phase is not found in either the CMSVSAM or CMSAMS segment. In this case, the specified phase is loaded either from a CMS DOSLIB or a VSE core image library, and the name, load point, entry point and length in bytes of the phase are saved in an available slot in the anchor table. ANCHSECT is called by the ANCHTAB macro.
ANCHSECT Control Block Content
ANCHSECT DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure ANCHSECT Anchor Table BEGINNING OF AN ANCHOR-TABLE: 0000 0 Address 4 ANCHENDA END ADDRESS OF ANCHOR TABLE 0004 4 Address 4 ABCHLUB Dynamic Assign Table 0008 8 Address 4 ANCHCBS POINTER TO VSAM "AMCB" TABLE 000C 12 Address 4 ANCHOAL POINTER TO VSAM "OAL" (OPEN ACB) TABLE 0010 16 Address 4 ANCHCCRB Compression Serv Root Block Ptr. 0014 20 Address 4 ANCHCCGT Compression Services Gate Word 0018 24 Signed 4 * (26) Reserved area for VSAM use FOLLOWED BY ONE OR MORE ANCHOR-TABLE ENTRIES OF THE FOLLOWING FORMAT: 0080 128 Character 8 ANCHPHNM PHASE NAME 0088 136 Address 4 ANCHLDPT LOAD POINT 008C 140 Address 4 ANCHENTP ENTRY POINT 0090 144 Bitstring 1 ANCHSTSW STATUS SWITCH 0091 145 Address 3 ANCHPHLN LENGTH OF PHASE IN BYTES Allocate space for 43 more 20 byte anchor table entries. 0094 148 Signed 4 * (219) Dynamic Fetch Entries, each 20 bytes, (CMS only). ANCHSTSW DEFINITIONS: .... .... ANCHMLOD X'00' PHASE MUST BE LOADED .111 1111 ANCHINST X'7F' PHASE IS ALREADY IN STORAGE 1111 1111 ANCHRPJL X'FF' REQUESTED PHASE JUST LOADED BY ANOTHER TASK (ONLY IF AP=YES) 00000014 ANCHLENG 20 LENGTH OF ONE ANCHOR-TABLE ENTRY 00000400 ANCHSIZ 1024 DEFAULT SIZE OF ANCHOR TABLE (IN BYTES)
ANCHSECT Storage Layout
*** ANCHSECT - Anchor Table * * +---------------------------+---------------------------+ * 0 | ANCHENDA | ABCHLUB | * +---------------------------+---------------------------+ * 8 | ANCHCBS | ANCHOAL | * +---------------------------+---------------------------+ * 10 | ANCHCCRB | ANCHCCGT | * +---------------------------+---------------------------+ * 18 |///////////////////////////////////////////////////////| * =///////////////////////////////////////////////////////= * |///////////////////////////////////////////////////////| * +-------------------------------------------------------+ * 80 | ANCHPHNM | * +---------------------------+---------------------------+ * 88 | ANCHLDPT | ANCHENTP | * +------+--------------------+---------------------------+ * 90 |:HSTSW| ANCHPHLN |///////////////////////////| * +------+--------------------+///////////////////////////| * 98 |///////////////////////////////////////////////////////| * =///////////////////////////////////////////////////////= * |///////////////////////////////////////////////////////| * +-------------------------------------------------------+ * 400 * *** ANCHSECT - Anchor Table
ANCHSECT Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----ABCHLUB 0004
ANCHCBS 0008
ANCHCCGT 0014
ANCHCCRB 0010
ANCHENDA 0000
ANCHENTP 008C
ANCHINST 0094 7F
ANCHLDPT 0088
ANCHLENG 0094 00000014
ANCHMLOD 0094 00
ANCHOAL 000C
ANCHPHLN 0091
ANCHPHNM 0080
ANCHRPJL 0094 FF
ANCHSIZ 0094 00000400
ANCHSTSW 0090
Last updated on 12 Aug 1999 at 11:17:17 EDT.
Copyright IBM Corporation, 1990, 1999