USERSAVE Back to Index page
 
Prolog 
Control Block Contents 
   USERSAVE DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This page documents intended Programming Interfaces that
allow the customer to write programs to obtain the services of z/VM.


  USERSAVE Prolog Top of page
  
 NAME       : USERSAVE
 DESCRIPTION: User Save Area
 DSECT      : USERSAVE
 FUNCTION   : Maps the area pointed to by R13 upon
              entry to a program called by SVC.
 
 
  USERSAVE Control Block Content Top of page
  




 USERSAVE DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      USERSAVE       User Save Area
0000    0 Dbl-Word     8 * (12)         Reserved for the user.
          00000060       USERSIZE       *-USERSAVE Size of area reserved
                                        for user.
0060   96 Dbl-Word     8 USERINFO       Information passed to user.
0060   96 Bitstring    1 USECTYP        Contains CALLTYP value.
0061   97 Bitstring    1 USEUFLG        Contains UFLAGS value.
0062   98 Bitstring    1 * (2)          Reserved for IBM use.
0064  100 Bitstring    1 USEMFLG        Miscellaneous bits.
          1... ....      USECMS         X'80' USECMS Invoked by CMSCALL.
          .1.. ....      USEA31         X'40' USEA31 Caller's AMODE is
                                        31.
          ..1. ....      USESCBLK       X'20' USESCBLK SCBLOCK is
                                        available in R2.
          ...1 ....      USEPLIST       X'10' USEPLIST Extended PLIST
                                        available in R0, only valid if
                                        invoked by CMSCALL.
          .... 1...      USEAR          X'08' USEAR Caller was in AR-mode
                                        when
          .... ...1      USEA64         X'01' USEA64 Caller's AMODE is 64
                                        (USEA31 is also ON for
                                        compatibility). CMSCALL issued
0065  101 Bitstring    1 * (3)          Reserved for IBM use.
          0000000D       USERSAVL       (*-USERSAVE+7)/8 BLOCK LENGTH
                                        (DOUBLEWORD)
 
 
  USERSAVE Storage Layout Top of page
  
          
*** USERSAVE - User Save Area
*
*     +-------------------------------------------------------+
*   0 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  60 |                       USERINFO                        |
*     +-------------------------------------------------------+
*  68
*
*** USERSAVE - User Save Area
          
*** Overlay for USERINFO in USERSAVE
*
*     +------+------+-------------+------+--------------------+
*  60 |:CTYP |:UFLG |/////////////|:MFLG |////////////////////|
*     +------+------+-------------+------+--------------------+
*  68
*
*** Overlay for USERINFO in USERSAVE
 
 
  USERSAVE Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
USEAR          0064 08
USEA31         0064 40
USEA64         0064 01
USECMS         0064 80
USECTYP        0060
USEMFLG        0064
USEPLIST       0064 10
USERINFO       0060
USERSAVL       0065 0000000D
USERSIZE       0000 00000060
USESCBLK       0064 20
USEUFLG        0061
 
This information is based on z/VM 6.3.0.
Last updated on 22 May 2013 at 13:50:16 EDT.
Copyright IBM Corporation, 1990, 2013