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Prolog 
Control Block Contents 
   SSAVE DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  SSAVE Prolog Top of page
 
 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 Top of page
 

 SSAVE DSECT Top of page
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' TPFERT ERROR RETURN DESIRED .1.. .... TPFNS X'40' TPFNS NO SAVE AREA ALLOCATED ..1. .... TPFR01 X'20' TPFR01 RETURN CALLEE'S R0-R1 TO CALLER ...1 .... TPFUSR X'10' TPFUSR 'USER' SVC CALL .... 1... TPFACB X'08' TPFACB OS VSAM SVC REQUEST .... ..1. TPFSV3 X'02' TPFSV3 SVC 203 .... ...1 TPFSVO X'01' TPFSVO 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 SSAOPSWA 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' SSACSRCH CMD SEARCH PERFORMED .1.. .... SSATRANS X'40' SSATRANS CMD NAME TRANSLATED ..1. .... SSASYNON X'20' SSASYNON CMD NAME SYNONYMED ...1 .... SSAMDMAP X'10' SSAMDMAP CMD map repl ldr tbl 00B5 181 Bitstring 1 SSASIMFL CMS simulation flag 1... .... SSASIMCB X'80' SSASIMCB MVS/OS blocks defined .1.. .... SSASIMPG X'40' SSASIMPG MVS/OS simulation prog. ..1. .... SSASIMRT X'20' SSASIMRT MVS/OS blocks returned. ...1 .... SSASIMX X'10' SSASIMX MVS/OS XCTL in progress .... 1... SSASPROC X'08' SSASPROC process created .... .1.. SSASEXEC X'04' SSASEXEC exec svc level .... ...1 SSACELSV X'01' SSACELSV 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 Top of page
 
          
*** 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 Top of page
 
 
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 7.3.0 Last updated on 22 Jun 2022 at 16:01:45 EDT.
Copyright IBM Corporation, 1990, 2022