IDM TITLE 'DMMIDM (IPCS) VM/370 - RELEASE 6' 00001000
* 00002000
* MODULE NAME: DMMIDM 00003000
* 00004000
* 00005000
* FUNCTION: WHEN CALLED DETERMINES FAILING OR CALLING MODULE 00006000
* NAME AND DISPLACEMENT WIHTIN THE MODULE. 00007000
* 00008000
* ATTRIBUTES: NON-REENTRANT 00009000
* NON-REUSABLE 00010000
* 00011000
* ENTRY POINTS: DMMIDM 00012000
* 00013000
* 00014000
* ENTRY CONDITIONS: AT ENTRY REG.1 POINTS TO A PARAMETER LIST. 00015000
* PLIST DS F FAILING ADDRESS OR BASE 00016000
* ADDRESS OF MODULE 00017000
* DS F REGISTER 14 ADDRESS FOR 00018000
* NON-PROGRAM CHECK CONDITION 00019000
* 00020000
* EXIT CONDITIONS: THE FAILING OR CALLING MODULE AND DISPLAC. 00021000
* HAS BEEN RESOLVED AND MOVED TO THE REPORT. 00022000
* IF POSSIBLE AN ENTRY POINT NAME IS ALSO 00023000
* DETERMINED. 00024000
* 00025000
* CALLS TO OTHER ROUTINES: DMMGRC - TO READ REQ.RECORD INTO 00026000
* THE WORK BUFFER 00027000
* DMMTRN - TO TRANSLATE THE DISPLACEMENT 00028000
* FORM BINARY TO ZONED FORMAT 00029000
* 00030000
* 00031000
* EXTERNAL REFERENCES: DMPINREC - DUMP INFORMATION RECORD 00032000
* WRKBUF - WORK BUFFER 00033000
* SHARECON - SHARED CONSTANT AREA 00034000
* EXTMAP1 - COMPRESSED LOAD MOD MAP 00035000
* 00036000
* 00037000
* TABLES/WORKAREAS: 00038000
* 00039000
* 00040000
* REGISTER USAGE: R13 - SAVE AREA 00041000
* R12 - BASE 00042000
* R10 - DUMP INFORMATION RECORD 00043000
* R9 - WORK BUFFER 00044000
* R7 - SHARED CONSTANT AREA 00045000
* R6 - COMPRESSED LOAD MOD MAP 00046000
* R2 - R5 WORK REGISTERS 00047000
* R1 - PARAMETER REGISTER 00048000
* 00049000
* 00050000
* NOTES: A 200 BYTE PATCH AREA EXISTS AT LABEL 'PATCH' 00051000
* 00052000
* 00053000
* OPERATION: THERE ARE FOUR DIFFERENT CONDITIONS UNDER WHICH 00054000
* DMMIDM CAN BE ENTERED. THEY ARE AS FOLLOWS: 00055000
* 00056000
* 1. FROM THE PRG.CHK RTN. WITH THE 00057000
* FAILING ADDRESS WITHIN THE FIXED 00058000
* NUCLEUS. 00059000
* 2. FROM THE PROGRAM CHECK ROUTINE WITH 00060000
* THE FAILING ADDRESS IN A PAGEABLE 00061000
* MODULE. 00062000
* 3. FROM THE CODED ABEND ROUTINE WITH 00063000
* BASE REGISTER ADDR.(FROM ONE OF THE 00064000
* SAVEAREAS BALR,FREE OR SAVEAREA) 00065000
* WITHIN THE FIXED NUCLEUS. 00066000
* 4. FROM THE CODED ABEND ROUTINE WITH 00067000
* BASE REG ADDR. IN A PAGED MODULE. 00068000
* CONDITION 1 00069000
* USING THE FAILURE ADDRESS SEARCH THE COMPRESSED LOAD MOD 00070000
* MAP FOR A MODULE NAME IN THE FAILURE ADDRESS RANGE. THIS 00071000
* WILL BE THE ENTRY POINT NAME AND IS MOVED TO THE PROBLEM 00072000
* REPORT. THE FIRST SIX CHARACTERS IS THE MODULE NAME AND IS 00073000
* ALSO MOVED TO THE PROBLEM REPORT. THE COMPRESSED LOAD IS 00074000
* NOW SEARCHED BACKWARDS TO FIND THE MODULE STARTING ADDRESS. 00075000
* THE STARTING ADDRESS IS SUBTRACTED FROM THE FAILURE ADDRESS 00076000
* TO DETERMINE THE DISPL. WITHIN THE MODULE OF THE FAILURE 00077000
* AND THE DISPLACEMENT IS MOVED TO THE PROBLEM REPORT. 00078000
* 00079000
* CONDITION 2 00080000
* REGISTER 12 ADDRESS, FROM THE REGISTERS AT ABEND, IS PASSED 00081000
* TO ROUTINE DMMGRC TO READ THE FAILING PAGE INTO THE WORK 00082000
* BUFFER. THE MODULE NAME IS MOVED TO THE PROBLEM REPORT. 00083000
* THE ADDRESS IN REGISTER 12 IS SUBTRACTED FROM THE FAILING 00084000
* ADDRESS TO GET THE DISPLACEMENT WITHIN THE MODULE OF THE 00085000
* FAILURE. THE DISPLACEMENT IS MOVED TO THE PROBLEM REPORT. 00086000
* 00087000
* CONDITION 3 00088000
* ENTERED WITH REGISTER 12 AND 14, OF THE MODULE CALLING THE 00089000
* ABENDING ROUTINE, IN THE PARAMETER LIST. THE MODULE NAME 00090000
* IS DETERMINED USING REGISTER 12 AND A COMPRESSED LOAD 00091000
* MOD MAP SEARCH. THE DISPLACEMENT WITHIN THE CALLER IS 00092000
* FOUND BY SUBTRACTING THE ADDRESS IN REGISTER 12 FROM THE 00093000
* ADDRESS IN REGISTER 14. 00094000
* 00095000
* CONDITION 4 00096000
* REGISTER 12 OF THE CALLING MODULE IS PASSED TO DMMGRC 00097000
* TO READ IN THE PAGE. THE MODULE NAME IS MOVED TO THE 00098000
* PROBLEM REPORT. THE DISPLACEMENT WITHIN THE CALLER IS 00099000
* FOUND BY SUBTRACTING THE ADDRESS IN REGISTER 12 FROM THE 00100000
* ADDRESS IN REGISTER 14. 00101000
* 00102000
* 00103000
* 00104000
* ERROR MESSAGES: 00105000
* 00106000
* 00107000
EJECT 00108000
ENTRY EXTMAP1 @VA04250 00109000
DMMIDM CSECT @VA04250 00110000
USING DMMIDM,R15 TEMPORARY ADDRESSABILITY @VA04250 00111000
B START BRANCH AROUND EYECATCHER @VA04250 00112000
DS 0D @VA04250 00113000
MODNAME DC C'DMMIDM ' MODULE NAME @VA04250 00114000
RELLEV DC C'REL4LEV0' RELEASE AND LEVEL @V4075A1 00115000
START STM R14,R12,12(R13) STORE CALLER'S REGISTERS @VA04250 00116000
DROP R15 @VA04250 00117000
LR R12,R15 LOAD OUR BASE REG @VA04250 00118000
USING DMMIDM,R12 ESTABLISH OUR ADDRESSABILITY @VA04250 00119000
ST R13,SAVEAREA+8 CALLER'S SAVEAREA POINTER @VA04250 00120000
LA R13,SAVEAREA POINT TO OUR SAVEAREA @VA04250 00121000
L R10,VINREC DUMP INFOR. RECORD POINTER @VA04250 00122000
USING DMPINREC,R10 ESTABLISH ADDRESSABILITY @VA04250 00123000
EXTRN WRKBUF @VA04250 00124000
L R9,=A(WRKBUF) POINT TO 4K WORK BUFFER @VA04250 00125000
USING WRKBUF,R9 @VA04250 00126000
L R7,VEXCON POINT TO SHARED CONSTANTS @VA04250 00127000
USING SHARECON,R7 ADDRESS OF SHRD CONSTANT @VA04250 00128000
L R6,=A(EXTMAP1) ADDRESS OF MOD MAP BUFFER @VA04250 00129000
USING EXTMAP1,R6 @VA04250 00130000
TM TYPESW,CPABSW IS THIS A CODED ABEND @VA04250 00131000
BO MODABND YES,GET THE SECOND PARAMETER @VA04250 00132000
L R2,0(R1) ADDR. FAIL OR BASE FROM PARM @VA04250 00133000
ST R2,FAILADD SAVE PROGRAM CHK ADDRESS @VA04250 00134000
B MODREAL BRANCH AROUND NEXT LOAD @VA04250 00135000
MODABND MVC VMMOD(L'VMCALL),VMCALL CHNG MOD.KEY TO CALLER @VA04250 00136000
L R2,REG14(R1) R14 ADDRESS FROM PARM LIST @VA04250 00137000
ST R1,PARMFLD SAVE PARM ADDRESS @VA04250 00138000
LA R2,0(,R2) RESET HIGH ORDER BYTE @VA04250 00139000
MODREAL L R3,REALEND HIGH ADDR OF FIXED NUCLEUS @VA04250 00140000
CR R2,R3 COMP. SRCH ADDR. TO REALEND @VA04250 00141000
BH MODPAGE NOT FIXED PAGE-GO READ PAGE @VA04250 00142000
LA R5,FIRSTADD GET FIRST ADDRESS ENTRY @VA04250 00143000
MODCOMP L R4,0(,R5) LOAD MAP ADDRESS ENTRY @VA04250 00144000
CR R2,R4 COMP MAP ADDR TO FAIL ADD @VA04250 00145000
BE MODFND IF EQUAL MODULE FOUND @VA04250 00146000
BL MODPAST IF R2 LOW - PAST MOD ENTRY @VA04250 00147000
LA R5,NXTENTRY(,R5) BUMP TO NEXT MAP ENTRY @VA04250 00148000
B MODCOMP AND GO CHECK FOR MATCH @VA04250 00149000
MODPAST LA R3,TWENTY SET R3 TO COUNT OF TWENTY @VA04250 00150000
SR R5,R3 BACK UP TO PREVIOUS ENTRY @VA04250 00151000
B MODMOVE GO SET UP TO MOVE MOD NAME @VA04250 00152000
MODFND LA R3,EIGHT SET R3 TO COUNT OF EIGHT @VA04250 00153000
SR R5,R3 USE THIS ENTRY FOR NAME @VA04250 00154000
MODMOVE MVC MODNAM(SIX),0(R5) MOVE MODNAME TO WORKAREA @VA04250 00155000
MVC VMENTRY1,0(R5) THIS IS E.P.-MOVE TO REPORT @VA04250 00156000
LH R4,KEY GET PRESENT KEY LENGTH @VA04250 00157000
LA R3,TWENTY GET ENTRY KEY LENGTH @VA04250 00158000
AR R4,R3 ADD NEW LENGTH @VA04250 00159000
STH R4,KEY STORE NEW LENGTH @VA04250 00160000
MVC VMMOD1,0(R5) MOVE MOD NAME TO REPORT @VA04250 00161000
LH R4,KEY GET CURRENT KEY LENGTH @VA04250 00162000
LA R3,MODKYLEN MODULE KEY LENGTH @VA04250 00163000
AR R4,R3 ADD NEW LENGTH @VA04250 00164000
STH R4,KEY UPDATE KEYLENGTH @VA04250 00165000
LA R3,TWELVE SET R3 TO COUNT OF 12 @VA04250 00166000
MODSTART SR R5,R3 SEE IF PRIOR ENTRY SAME MOD @VA04250 00167000
CLC MODNAM,0(R5) COMPARE ENTRY TO SAVED NAME @VA04250 00168000
BE MODSTART KEEP GOING BACK @VA04250 00169000
L R3,STRTADDR(R5) WE HAVE STARTING ADDRESS @VA04250 00170000
SR R2,R3 SUBT. SRCH ADDR FROM START @VA04250 00171000
LA R2,0(,R2) RESET HIGH BYTE @VA04250 00172000
STH R2,MODTRN SAVE DISPLACEMENT @VA04250 00173000
ST R2,MODDISP SAVE DISP FOR CALLER @VA04250 00174000
LA R2,MODTRN GET DISPLACEMENT ADDRESS @VA04250 00175000
ST R2,TRNPARM1 DATA ADDRESS FOR TRN @VA04250 00176000
LA R3,TWO SET BYTE COUNT FOR TRANSLATE @VA04250 00177000
ST R3,TRNPARM BYTE COUNT FOR TRN @VA04250 00178000
CALL DMMTRN GO TRANSLATE DISPLACEMENT @VA04250 00179000
LR R5,R1 TRANSLATED DATA ADDRESS @VA04250 00180000
MVC VMDISP1,0(R5) MOVE DISPLACEMENT TO REPORT @VA04250 00181000
LH R4,KEY GET CURRENT KEY LENGTH @VA04250 00182000
LA R3,KYDISP DISPLACEMENT KEY LENGTH @VA04250 00183000
AR R4,R3 ADD NEW LENGTH @VA04250 00184000
STH R4,KEY STORE NEW KEY LENGTH @VA04250 00185000
B MODRET RETURN TO CALLER @VA04250 00186000
MODPAGE TM TYPESW,PRGCKSW WAS IT A PROGRAM CHECK @VA04250 00187000
BO MODPRGCK YES, GO PROCESS PROGRAM CHK @VA04250 00188000
LA R1,PARMFLD GET PARM FIELD ADDRESS @VA04250 00189000
L R2,0(,R1) @VA04250 00190000
L R2,0(,R2) GET R12 ADDRESS @VA04250 00191000
ST R2,GRCPARM RECORD ADDRESS FOR GRC @VA04250 00192000
CALL DMMGRC CALL GETREC TO READ IN PAGE @VA04250 00193000
LR R2,R1 RECORD ADDRESS FROM GRC @VA04250 00194000
CLC MODPREFX,0(R2) CHECK FOR MODULE NAME @VA04250 00195000
BE MODGOOD MOVE MOD NAME TO REPORT @VA04250 00196000
B MODRET OTHERWISE RETURN TO CALLER @VA04250 00197000
MODGOOD MVC VMMOD1,0(R2) MOVE MODULE NAME TO REPORT @VA04250 00198000
LA R4,MODKYLEN LENGTH OF MODULE KEY @VA04250 00199000
LH R3,KEY CURRENT KEY LENGTH @VA04250 00200000
AR R4,R3 ADD NEW KEY LENGTH @VA04250 00201000
STH R4,KEY UPDATE KEY LENGTH @VA04250 00202000
LA R1,PARMFLD GET PARM FIELD ADDRESS @VA04250 00203000
L R1,0(,R1) R12 ADDRESS FROM PARM @VA04250 00204000
L R3,PARMR14(R1) GET R14 ADDR. FROM PARM @VA04250 00205000
L R2,0(,R1) R12 ADDRESS FROM PARM @VA04250 00206000
SR R3,R2 SUBT. SEARCH ADDR. FROM R14 @VA04250 00207000
STH R3,MODTRN SET UP TO TRANSLATE DISP @VA04250 00208000
LA R2,MODTRN GET DISP SAVE ADDRESS @VA04250 00209000
ST R2,TRNPARM1 DATA ADDRESS FOR TRN @VA04250 00210000
LA R3,TWO SET BYTE COUNT FOR TRANSLATE @VA04250 00211000
ST R3,TRNPARM BYTE COUNT FOR TRN @VA04250 00212000
CALL DMMTRN CALL TRANSLATE ROUTINE @VA04250 00213000
LR R5,R1 TRANSLATED DATA ADDRESS @VA04250 00214000
MVC VMDISP1,0(R5) MOVE DISPLACEMENT TO REPORT @VA04250 00215000
LH R4,DISPLN LENGTH OF DISPL. KEY @VA04250 00216000
LH R3,KEY CURRENT KEY LENGTH @VA04250 00217000
AR R4,R3 NEW LENGTH @VA04250 00218000
STH R4,KEY UPDATE KEY FIELD @VA04250 00219000
MODRET L R13,SAVEAREA+8 GET SAVE AREA ADDRESS @VA04250 00220000
LM R14,R12,12(R13) RESTORE THE REGISTERS @VA04250 00221000
BR R14 RETURN TO CALLER @VA04250 00222000
MODPRGCK L R2,DMPGPRS+R12DISP GET R12 FROM GENERAL REGS @VA04250 00223000
ST R2,GRCPARM RECORD ADDRESS FOR GRC @VA04250 00224000
CALL DMMGRC CALL RECORD READ ROUTINE @VA04250 00225000
LR R2,R1 RECORD ADDRESS FROM GRC @VA04250 00226000
CLC MODPREFX,0(R2) IS IT 'DMK' @VA04250 00227000
BNE MODRET @VA04250 00228000
MVC VMMOD1,0(R2) MOVE MODULE NAME TO REPORT @VA04250 00229000
LA R4,MODKYLEN LENGTH OF MODULE KEYWORD @VA04250 00230000
LH R3,KEY CURRENT KEY LENGTH @VA04250 00231000
AR R4,R3 NEW LENGTH @VA04250 00232000
STH R4,KEY UPDATE KEY LENGTH @VA04250 00233000
L R4,FAILADD FAILING ADDRESS FROM PC PSW @VA04250 00234000
L R3,DMPGPRS+R12DISP GET REG 12 FROM DMP INFO REC @VA04250 00235000
SR R4,R3 CALCULATE DISPLACEMENT @VA04250 00236000
L R3,MAXDISP SET R3 TO MAX DISPL. @VA04250 00237000
LA R4,0(R4) CLEAR HIGH BYTE @VA04250 00238000
CR R4,R3 IS MAX EXCEEDED? @VA04250 00239000
BL DISPLOW NO,USE IT @VA04250 00240000
LA R5,DSPINVAL GET ? MARKS FOR INVALID DISP @VA04250 00241000
B MOVEDISP AND MOVE INTO REPORT @VA04250 00242000
DISPLOW ST R4,MODDISP SAVE DISPLACEMENT @VA04250 00243000
STH R4,MODTRN @VA04250 00244000
LA R4,MODTRN @VA04250 00245000
ST R4,TRNPARM1 DATA ADDRESS FOR TRN @VA04250 00246000
LA R3,TWO SET BYTE COUNT FOR TRANSLATE @VA04250 00247000
ST R3,TRNPARM BYTE COUNT FOR TRN @VA04250 00248000
CALL DMMTRN @VA04250 00249000
LR R5,R1 TRANSLATED DATA @VA04250 00250000
MOVEDISP MVC VMDISP1,0(R5) MOVE DISPLACEMENT TO REPORT @VA04250 00251000
LH R4,KEY GET CURRENT KEY LENGTH @VA04250 00252000
LA R3,KYDISP DISPLACEMENT KEY LENGTH @VA04250 00253000
AR R4,R3 CALC NEW KEY LENGTH @VA04250 00254000
STH R4,KEY UPDATE KEY LENGTH @VA04250 00255000
B MODRET @VA04250 00256000
***************************************** 00257000
* CONSTANTS SAVEAREAS AND EQUATES 00258000
MAXDISP DC X'00001001' MAX DISPLACEMENT + 1 @VA04250 00259000
DSPINVAL DC CL4'????' DISPLACEMENT NOT VALID IND. @VA04250 00260000
***************************************** 00261000
FAILADD DS F PROGRAM CHECK ADDRESS @VA04250 00262000
MODNAM DS CL6 LABEL AT EYECATHCER @VA04250 00263000
PARMFLD DS F SAVE AREA-INPUT PARM FIELD @VA04250 00264000
MODTRN DS F DATA FIELD FOR TRANS. PARM @VA04250 00265000
VMCALL DC C'VMCALLER' KEYWORD FOR CALLING MODULE @VA04250 00266000
SAVEAREA DS 18F OUR SAVEAREA @VA04250 00267000
VEXCON DC V(SHARECON) POINTER TO SHARED CONSTANTS @VA04250 00268000
VINREC DC V(EXTINREC) INPUT RECORD BUFFER @VA04250 00269000
MODPREFX DC C'DMK' MODULE PREFIX @VA04250 00270000
PATCH DC 50F'0' PATCH AREA @VA04250 00271000
TWO EQU 2 TWO FOR LOAD ADDRESS ETC. @VA04250 00272000
FOUR EQU 4 FOUR FOR LOAD ADDRESS ETC. @VA04250 00273000
SIX EQU 6 6 FOR LOAD ADDRESS ETC. @VA04250 00274000
EIGHT EQU 8 8 FOR LOAD ADDRESS ETC. @VA04250 00275000
TWELVE EQU 12 12 FOR LOAD ADDRESS ETC. @VA04250 00276000
KYDISP EQU 15 DISPLACEMENT INTO KEYWORD @VA04250 00277000
MODKYLEN EQU 19 KEYWORD DATA LENGTH @VA04250 00278000
TWENTY EQU 20 20 FOR LOAD ADDRESS ETC. @VA04250 00279000
R12DISP EQU 48 LOCATION OF R12 IN SAVE AREA @VA04250 00280000
PARMR14 EQU 4 PARM FIELD DISPL. FOR R14 @VA04250 00281000
LTORG @VA04250 00282000
EXTMAP1 DS 1024F @VA04250 00283000
EXTMAP2 DS 1024F @VA04250 00284000
EXTMAP3 DS 1024F @VA04250 00285000
EXTMAP4 DS 1024F @VA08089 00285300
EXTMAP5 DS 1024F @VA08089 00285600
REGEQU @VA04250 00286000
COPY EXCONST @VA04250 00287000
COPY DMPBLOKS @VA04250 00288000
REG14 EQU 4 REG 14 ADDRESS LOCATION IN PARM @VA04250 00289000
FIRSTADD EQU EXTMAP1+8 FIRST MAP ADDRESS @VA04250 00290000
NXTENTRY EQU 12 ADDRESS INCREMENT IN LOAD MAP @VA04250 00291000
STRTADDR EQU 20 DECREMENT VALUE FOR LOAD MAP @VA04250 00292000
END 00293000