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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
SSAVE
Control Block Contents
SSAVE DSECT
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
Last updated on 1 May 2002 at 14:29:38 EDT.
Copyright IBM Corporation, 1990, 2002