Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
$AMSG
Control Block Contents
$AMSG DSECT
Cross Reference (Contains links to field and bit definitions)
$AMSG Prolog
NAME : LGRAMSG DESCRIPTION: Relocation mapping for HCPAMSG DSECT : $AMSG FUNCTION : LGRAMSG describes those fields of the AMSG block that will be relocated to the destination system during guest relocation. LOCATED BY : This is a mapping of the RDODATA area within the RDOBK during guest relocation. CREATED BY : HCPRLFAF - AMSG/IOCM Formatter for LGR DELETED BY : HCPRLDRL - Release storage associated with an RDP RELOCATION CONSIDERATIONS : This control block is used during live guest relocation. It is used to relocate a control block defined in a corresponding HCP COPY file. Any fields or bits defined in HCPAMSG which are required on the destination system must be defined here, and code must be added to migrate the field or bit during a relocation.
$AMSG Control Block Content
$AMSG DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $AMSG Relocation mapping for HCPAMSG 00000001 $AMSG_VER 1 Mapping version number for this DSECT. Version is independent of the CP level and need only be changed when this DSECT is changed. The convention is to increment by 1. 0000 0 Signed 2 $AMSG_HDRL Header length (in bytes) 0002 2 Signed 2 $AMSG_BITL Length of mapped bits (in bytes) 0004 4 Signed 4 * Reserved for future use 00000008 $AMSG_HDLN *-$AMSG Length of header (bytes) Bit map: Contains the AMSG flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in HCPAMSG. This yields a consistent mapping that ensures compatibility when a guest is relocated between systems at differing service levels. Names in the comments column indicate the control block byte which contains the flag. This name is subject to change if the flag definition changes. ====> NEVER change bits which already exist here. ====> NEVER change the order of bits in this section. ====> ALWAYS add new bits at the end of this section, together with new flag bytes as required. 0008 8 Signed 2 $AMSG_BITS (0) Bit map area 00000000 $AMSG_BLEN *-$AMSG_BITS Length of bit map area Data: Contains all HCPAMSG data that is subject to relocation, except for flag bits, which are handled separately. All fields are defined as XLnn to avoid alignment warnings and to pack the data efficiently. ====> NEVER change fields which already exist here. ====> NEVER change the order of fields in this section. ====> ALWAYS add new fields at the end of this section. together with new flag bytes as required. 0008 8 Bitstring 1 $AMSG_DATA (0) Start of data map 0008 8 Bitstring 4 $AMSGNEXT Pointer to next AMSG block 000C 12 Bitstring 4 $AMSGBKID IDs storage area as an AMSG block 0010 16 Bitstring 4 $AMSGTLG Length of entire message HDR+MSG 0014 20 Bitstring 4 $AMSGMGID Message ID 0018 24 Bitstring 2 $AMSGLGH Length of the message 001A 26 Bitstring 1 $AMSGEVST Asynchronous Event status 001B 27 Bitstring 1 $AMSGSESS Session ID 001C 28 Bitstring 1 $AMSGBUF (0) Message buffer contents 0000001C $AMSG_LEN *-$AMSG Total length, in bytes 00000004 $AMSG_SZ ($AMSG_LEN+7)/8 Size in doublewords
$AMSG Storage Layout
*** $AMSG - Relocation mapping for HCPAMSG * * +-------------+-------------+---------------------------+ * 0 | $AMSG_HDRL | $AMSG_BITL |///////////////////////////| * +-------------+-------------+---------------------------+ * 8 | $AMSGNEXT | $AMSGBKID | * +---------------------------+---------------------------+ * 10 | $AMSGTLG | $AMSGMGID | * +-------------+------+------+---------------------------+ * 18 | $AMSGLGH |(01A) |(01B) | * +-------------+------+------+ * *** $AMSG - Relocation mapping for HCPAMSG
$AMSG Cross Reference
Symbol Dspl Value -------------- ---- ----- $AMSG_BITL 0002 $AMSG_BITS 0008 $AMSG_BLEN 0008 00000000 $AMSG_DATA 0008 $AMSG_HDLN 0004 00000008 $AMSG_HDRL 0000 $AMSG_LEN 001C 0000001C $AMSG_SZ 001C 00000004 $AMSG_VER 0000 00000001 $AMSGBKID 000C $AMSGBUF 001C $AMSGEVST 001A $AMSGLGH 0018 $AMSGMGID 0014 $AMSGNEXT 0008 $AMSGSESS 001B $AMSGTLG 0010
Copyright IBM Corporation, 1990, 2011