Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of z/VM.

SSAVE

Prolog  

Control Block Contents  
   SSAVE DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  


SSAVE Prolog

 Name       : SVCSAVE
 Description: bilingual SVCSAVE macro
 DSECT      : SSAVE
 Function   : map of the system save area. SSAVE
              is used by DMSITS to save the value of the SVC
              old PSW, the caller's registers, and other
              necessary control information required to
              process the SVC and return to the caller.
              Because SVC calls can be nested, several of
              these save areas can exist at one time. The
              system save area is dynamically allocated in
              protected free storage.

 

SSAVE Control Block Content


SSAVE DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SSAVE          bilingual SVCSAVE macro
0000    0 Bitstring    1 OVIND          OVERRIDE IND: 0,1,2,3
0001    1 Bitstring    1 TYPFLAG        SVC TYPE FLAG BYTE
          1... ....      TPFERT         X'80' ERROR RETURN DESIRED
          .1.. ....      TPFNS          X'40' NO SAVE AREA ALLOCATED
          ..1. ....      TPFR01         X'20' RETURN CALLEE'S R0-R1 TO
                                        CALLER
          ...1 ....      TPFUSR         X'10' 'USER' SVC CALL
          .... 1...      TPFACB         X'08' OS VSAM SVC REQUEST
          .... ..1.      TPFSV3         X'02' SVC 203
          .... ...1      TPFSVO         X'01' OS SIMULATION SVC
0002    2 Signed       2 CODE           SVC 203 CODE VALUE
0004    4 Address      4 CALLER         ADDRESS OF SVC CALLER
0008    8 Character    8 CALLEE         NAME OF ROUTINE BEING CALLED
0010   16 Dbl-Word     8 OLDPSW         SVC OLDPSW OF CALLER
          ...1 .1..      SSAOPSWA       OLDPSW+4 ADDRESS IN SVC OLD PSW
0018   24 Address      4 NRMRET         ADDRESS FOR NORMAL RETUR
001C   28 Address      4 ERRET          ADDRESS FOR ERROR RETURN
0020   32 Signed       4 EGPRS (0)      GENERAL REGS AT ENTRY TO SVC
0020   32 Signed       4 EGPR0          R0
0024   36 Signed       4 EGPR1          R1
0028   40 Signed       4 EGPR2          R2
002C   44 Signed       4 EGPR3          R3
0030   48 Signed       4 EGPR4          R4
0034   52 Signed       4 EGPR5          R5
0038   56 Signed       4 EGPR6          R6
003C   60 Signed       4 EGPR7          R7
0040   64 Signed       4 EGPR8          R8
0044   68 Signed       4 EGPR9          R9
0048   72 Signed       4 EGPR10         R10
004C   76 Signed       4 EGPR11         R11
0050   80 Signed       4 EGPR12         R12
0054   84 Signed       4 EGPR13         R13
0058   88 Signed       4 EGPR14         R14
005C   92 Signed       4 EGPR15         R15
0060   96 Dbl-Word     8 EFPRS (0)      FLOATING POINT REGS AT ENTRY
0060   96 Dbl-Word     8 EFPR0          FPR0
0068  104 Dbl-Word     8 EFPR2          FPR2
0070  112 Dbl-Word     8 EFPR4          FPR4
0078  120 Dbl-Word     8 EFPR6          FPR6
0080  128 Character    4 CHKWRD1        CHECK WORD ONE
0084  132 Address      4 SSAVENXT       ADDRESS OF NEXT SSAVE AREA
0088  136 Address      4 SSAVEPRV       ADDRESS OF PREVIOUS SSAVE AREA
008C  140 Address      4 USAVEPTR       ADDRESS OF CORRESPONDING USER
                                        SAVE AREA
0090  144 Signed       4 OSTEMP         TEMP FOR OS SIMULATION ROUTINES
     'DMSKEY' KEY STACK
          00000007       KEYMAX         7 MAXIMUM NUMBER OF KEYS IN STACK
0094  148 Bitstring    1 KEYP           NUMBER OF KEYS ON STACK
0095  149 Bitstring    1 KEYS (7)       KEY STACK
     THE FOLLOWING FIELDS ARE FILLED IN ONLY BY DMSOVS, THE SVCTRACE
     SUBROUTINE.
009C  156 Signed       4 XGPR0          EXTRA COPY OF EGPR0
00A0  160 Signed       4 XGPR1          EXTRA COPY OF EGPR1
00A4  164 Signed       4 XGPR15         EXTRA COPY OF EGPR15
00A8  168 Signed       4 XCOUNT         EXTRA COPY OF SVCOUNT
00AC  172 Character    4 CHKWRD2        SECOND CHECK WORD
00B0  176 Signed       4 SSAPSDPL       CHAIN ANCHOR FOR PSDPL BLOCKS
                                        USED BY PARSER
00B4  180 Bitstring    1 SSACMDRS       COMMAND RESOLUTION FLAG
          1... ....      SSACSRCH       X'80' CMD SEARCH PERFORMED
          .1.. ....      SSATRANS       X'40' CMD NAME TRANSLATED
          ..1. ....      SSASYNON       X'20' CMD NAME SYNONYMED
          ...1 ....      SSAMDMAP       X'10' CMD map repl ldr tbl
00B5  181 Bitstring    1 SSASIMFL       CMS simulation flag
          1... ....      SSASIMCB       X'80' MVS/OS blocks defined
          .1.. ....      SSASIMPG       X'40' MVS/OS simulation prog.
          ..1. ....      SSASIMRT       X'20' MVS/OS blocks returned.
          ...1 ....      SSASIMX        X'10' MVS/OS XCTL in progress
          .... 1...      SSASPROC       X'08' process created
          .... .1..      SSASEXEC       X'04' exec svc level
          .... ...1      SSACELSV       X'01' A call was made to the
                                        DMSANCSV service at this SVC
                                        level
00B6  182 Bitstring    2 *              RESERVED
00B8  184 Signed       4 SSAPRSUB       Private Subpool anchor
00BC  188 Signed       4 SSASHSUB       Shared Subpool anchor
00C0  192 Address      4 SSAPLC         PLIST COPY BLOCK
00C4  196 Signed       4 SSAC6SA        Save Control Reg. 6
00C8  200 Bitstring    1 SSAOCODE       INTERRUPT CODE
00C9  201 Bitstring    3 *              RESERVED
00CC  204 Address      4 SSAPRGBK       Ptr to cmd set PRGBK
00D0  208 Signed       4 SSAC14SA       Save Control Reg. 14
00D4  212 Signed       4 EARS (0)       Access Registers atentry
00D4  212 Signed       4 EAR0           Access Register 0
00D8  216 Signed       4 EAR1           Access Register 1
00DC  220 Signed       4 EAR2           Access Register 2
00E0  224 Signed       4 EAR3           Access Register 3
00E4  228 Signed       4 EAR4           Access Register 4
00E8  232 Signed       4 EAR5           Access Register 5
00EC  236 Signed       4 EAR6           Access Register 6
00F0  240 Signed       4 EAR7           Access Register 7
00F4  244 Signed       4 EAR8           Access Register 8
00F8  248 Signed       4 EAR9           Access Register 9
00FC  252 Signed       4 EAR10          Access Register 10
0100  256 Signed       4 EAR11          Access Register 11
0104  260 Signed       4 EAR12          Access Register 12
0108  264 Signed       4 EAR13          Access Register 13
010C  268 Signed       4 EAR14          Access Register 14
0110  272 Signed       4 EAR15          Access Register 15
0114  276 Address      4 SSCELANC       CEL Anchor
0118  280 Address      4 SSTEMPAV       CEL Anchor Vector saved
011C  284 Character    8 SSACMDN        COMMAND NAME
0124  292 Character    8 SSAPARM1       COMMAND PARMETER
          00000026       SSAVESZ        (*-SSAVE+7)/8 SIZE OF SYSTEM SAVE
                                        AREA FORMAT OF THE REGISTER SAVE
                                        AREA IN USERSAVE. THIS IS THE
                                        PART OF USERSAVE THAT THE USER
                                        CAN USE FOR REGISTERS. THE
                                        USERSAVE MACRO DESCRIBES THE
                                        WHOLE AREA PASSED TO THE USER.

 

SSAVE Storage Layout

          
*** SSAVE - bilingual SVCSAVE macro
*
*     +------+------+-------------+---------------------------+
*   0 |OVIND |:FLAG |    CODE     |          CALLER           |
*     +------+------+-------------+---------------------------+
*   8 |                        CALLEE                         |
*     +-------------------------------------------------------+
*  10 |                        OLDPSW                         |
*     +---------------------------+---------------------------+
*  18 |          NRMRET           |          ERRET            |
*     +---------------------------+---------------------------+
*  20 |          EGPR0            |          EGPR1            |
*     +---------------------------+---------------------------+
*  28 |          EGPR2            |          EGPR3            |
*     +---------------------------+---------------------------+
*  30 |          EGPR4            |          EGPR5            |
*     +---------------------------+---------------------------+
*  38 |          EGPR6            |          EGPR7            |
*     +---------------------------+---------------------------+
*  40 |          EGPR8            |          EGPR9            |
*     +---------------------------+---------------------------+
*  48 |          EGPR10           |          EGPR11           |
*     +---------------------------+---------------------------+
*  50 |          EGPR12           |          EGPR13           |
*     +---------------------------+---------------------------+
*  58 |          EGPR14           |          EGPR15           |
*     +---------------------------+---------------------------+
*  60 |                        EFPR0                          |
*     +-------------------------------------------------------+
*  68 |                        EFPR2                          |
*     +-------------------------------------------------------+
*  70 |                        EFPR4                          |
*     +-------------------------------------------------------+
*  78 |                        EFPR6                          |
*     +---------------------------+---------------------------+
*  80 |         CHKWRD1           |         SSAVENXT          |
*     +---------------------------+---------------------------+
*  88 |         SSAVEPRV          |         USAVEPTR          |
*     +---------------------------+------+--------------------+
*  90 |          OSTEMP           |KEYP  |      (095)-        |
*     +---------------------------+------+--------------------+
*  98 |          -KEYS            |          XGPR0            |
*     +---------------------------+---------------------------+
*  A0 |          XGPR1            |          XGPR15           |
*     +---------------------------+---------------------------+
*  A8 |          XCOUNT           |         CHKWRD2           |
*     +---------------------------+------+------+-------------+
*  B0 |         SSAPSDPL          |:CMDRS|:SIMFL|/////////////|
*     +---------------------------+------+------+-------------+
*  B8 |         SSAPRSUB          |         SSASHSUB          |
*     +---------------------------+---------------------------+
*  C0 |          SSAPLC           |         SSAC6SA           |
*     +------+--------------------+---------------------------+
*  C8 |:OCODE|////////////////////|         SSAPRGBK          |
*     +------+--------------------+---------------------------+
*  D0 |         SSAC14SA          |           EAR0            |
*     +---------------------------+---------------------------+
*  D8 |           EAR1            |           EAR2            |
*     +---------------------------+---------------------------+
*  E0 |           EAR3            |           EAR4            |
*     +---------------------------+---------------------------+
*  E8 |           EAR5            |           EAR6            |
*     +---------------------------+---------------------------+
*  F0 |           EAR7            |           EAR8            |
*     +---------------------------+---------------------------+
*  F8 |           EAR9            |          EAR10            |
*     +---------------------------+---------------------------+
* 100 |          EAR11            |          EAR12            |
*     +---------------------------+---------------------------+
* 108 |          EAR13            |          EAR14            |
*     +---------------------------+---------------------------+
* 110 |          EAR15            |         SSCELANC          |
*     +---------------------------+---------------------------+
* 118 |         SSTEMPAV          |         SSACMDN-          |
*     +---------------------------+---------------------------+
* 120 |          -(11C)           |        SSAPARM1-          |
*     +---------------------------+---------------------------+
* 128 |          -(124)           | 12C
*     +---------------------------+
*
*** SSAVE - bilingual SVCSAVE macro

 

SSAVE Cross Reference

Symbol         Dspl Value
-------------- ---- -----
CALLEE         0008
CALLER         0004
CHKWRD1        0080
CHKWRD2        00AC
CODE           0002
EARS           00D4
EAR0           00D4
EAR1           00D8
EAR10          00FC
EAR11          0100
EAR12          0104
EAR13          0108
EAR14          010C
EAR15          0110
EAR2           00DC
EAR3           00E0
EAR4           00E4
EAR5           00E8
EAR6           00EC
EAR7           00F0
EAR8           00F4
EAR9           00F8
EFPRS          0060
EFPR0          0060
EFPR2          0068
EFPR4          0070
EFPR6          0078
EGPRS          0020
EGPR0          0020
EGPR1          0024
EGPR10         0048
EGPR11         004C
EGPR12         0050
EGPR13         0054
EGPR14         0058
EGPR15         005C
EGPR2          0028
EGPR3          002C
EGPR4          0030
EGPR5          0034
EGPR6          0038
EGPR7          003C
EGPR8          0040
EGPR9          0044
ERRET          001C
KEYMAX         0090 00000007
KEYP           0094
KEYS           0095
NRMRET         0018
OLDPSW         0010
OSTEMP         0090
OVIND          0000
SSACELSV       00B5 01
SSACMDN        011C
SSACMDRS       00B4
SSACSRCH       00B4 80
SSAC14SA       00D0
SSAC6SA        00C4
SSAMDMAP       00B4 10
SSAOCODE       00C8
SSAOPSWA       0010 14
SSAPARM1       0124
SSAPLC         00C0
SSAPRGBK       00CC
SSAPRSUB       00B8
SSAPSDPL       00B0
SSASEXEC       00B5 04
SSASHSUB       00BC
SSASIMCB       00B5 80
SSASIMFL       00B5
SSASIMPG       00B5 40
SSASIMRT       00B5 20
SSASIMX        00B5 10
SSASPROC       00B5 08
SSASYNON       00B4 20
SSATRANS       00B4 40
SSAVENXT       0084
SSAVEPRV       0088
SSAVESZ        0124 00000026
SSCELANC       0114
SSTEMPAV       0118
TPFACB         0001 08
TPFERT         0001 80
TPFNS          0001 40
TPFR01         0001 20
TPFSVO         0001 01
TPFSV3         0001 02
TPFUSR         0001 10
TYPFLAG        0001
USAVEPTR       008C
XCOUNT         00A8
XGPR0          009C
XGPR1          00A0
XGPR15         00A4

This information is based on z/VM V4R1.0.
Last updated on 12 Jul 2001 at 14:03:32 EDT.
Copyright IBM Corporation, 1990, 2001