ibm:vm370-lib:cms:dmsexc.assemble_hst
Table of Contents
DMSEXC History
References
- Fixes Applied : 1
- Latest Source Date : Tuesday, December 12, 1978
- Last Fix ID : [HRC371DS]
Update History
CMS File Input : DMSEXC ASSEMBLE
Date : 12/12/1978 8:26:00 AM
VM Context : MAINT(393)
File Name : DMSEXC.ASSEMBLE.Z1.txt
Modified : 1/16/2021 7:31:31 AM
Created : 1/16/2021 7:31:31 AM
Update Order
- HRC371DS 1.2 Support execution of REXX programs as filetype EXEC
HRC371DS
Date Friday Jun 04, 2010 10:07:00 AM
Loaded from MAINT(093)
HRC371DS: ./ I 00041000 $ 41100 100 06/14/10 11:06:58
HRC371DS: * REXX - Execute a REXX procedure HRC371DS 00041100
HRC371DS: ./ I 00051000 $ 51100 100 06/14/10 11:06:58
HRC371DS: * BUFFER - read first line of EXEC here HRC371DS 00051100
HRC371DS: * FILEID - fileid of EXEC to read HRC371DS 00051200
HRC371DS: ./ I 00060000 $ 60100 100 06/14/10 11:06:58
HRC371DS: * GPR9 = saved R14 while checking for REXX program HRC371DS 00060100
HRC371DS: * GPR10 = saved R0 while checking for REXX program HRC371DS 00060200
HRC371DS: * GPR11 = saved R1 while checking for REXX program HRC371DS 00060300
HRC371DS: ./ I 00071000 $ 71100 100 06/14/10 11:06:58
HRC371DS: * 0. Read the first line of the user program, and scan HRC371DS 00071100
HRC371DS: * to determine if the first word in the line is HRC371DS 00071200
HRC371DS: * '/*'. If so, call REXX via SVC 202 to execute HRC371DS 00071300
HRC371DS: * the program, then return to our caller. HRC371DS 00071400
HRC371DS: * HRC371DS 00071500
HRC371DS: ./ I 00098000 $ 98010 10 06/14/10 11:06:58
HRC371DS: SPACE 1 HRC371DS 00098010
HRC371DS: * The exec program can be written either in REXX or EXEC. We HRC371DS 00098020
HRC371DS: * read the first line of the file, and if the first word in HRC371DS 00098030
HRC371DS: * that line begins with '/*', then it is a REXX program, and HRC371DS 00098040
HRC371DS: * we invoke DMSREX to execute it. Otherwise we fall through HRC371DS 00098050
HRC371DS: * and let EXEC handle it. HRC371DS 00098060
HRC371DS: LR R9,R14 save return address HRC371DS 00098070
HRC371DS: LR R10,R0 save eplist pointer HRC371DS 00098080
HRC371DS: LR R11,R1 save plist pointer HRC371DS 00098090
HRC371DS: DMSFREE DWORDS=66,TYPE=NUCLEUS,TYPCALL=BALR HRC371DS 00098100
HRC371DS: LR R8,R1 save memory address HRC371DS 00098110
HRC371DS: USING WORK,R8 HRC371DS 00098120
HRC371DS: LA R7,256(R8) map FSCB on top of BUFFER1 HRC371DS 00098130
HRC371DS: USING FSCBD,R7 HRC371DS 00098140
HRC371DS: MVC FSCBCOMM(8),=C'RDBUF ' HRC371DS 00098150
HRC371DS: MVC FSCBFN(8),8(R11) copy exec name HRC371DS 00098160
HRC371DS: MVC FSCBFT(10),=C'EXEC * ' HRC371DS 00098170
HRC371DS: MVC FSCBITNO(2),=H'1' HRC371DS 00098180
HRC371DS: ST R8,FSCBBUFF HRC371DS 00098190
HRC371DS: MVC FSCBSIZE,=F'256' buffer length HRC371DS 00098200
HRC371DS: MVC FSCBNOIT(2),=H'1' HRC371DS 00098210
HRC371DS: LR R1,R7 address of FSCB HRC371DS 00098220
HRC371DS: L R15,ARDBUF HRC371DS 00098230
HRC371DS: BALR R14,R15 read the file's first line HRC371DS 00098240
HRC371DS: BNZ NOTREXX let EXEC handle any read error HRC371DS 00098250
HRC371DS: MVC FSCBCOMM(8),=C'FINIS ' HRC371DS 00098260
HRC371DS: L R15,AFINIS close the file HRC371DS 00098270
HRC371DS: BALR R14,R15 HRC371DS 00098280
HRC371DS: * Now scan the line we read, looking for '/*'. HRC371DS 00098290
HRC371DS: L R5,FSCBNORD get bytes read HRC371DS 00098300
HRC371DS: DROP R7 HRC371DS 00098310
HRC371DS: LR R3,R8 start of line into R3 HRC371DS 00098320
HRC371DS: LA R4,1 increment HRC371DS 00098330
HRC371DS: AR R5,R3 end of line into R5 HRC371DS 00098340
HRC371DS: SCANLOOP DS 0H HRC371DS 00098350
HRC371DS: CLI 0(R3),C' ' skip blanks HRC371DS 00098360
HRC371DS: BNE CHECK found non-blank HRC371DS 00098370
HRC371DS: BXLE R3,R4,SCANLOOP keep looking HRC371DS 00098380
HRC371DS: CHECK DS 0H HRC371DS 00098390
HRC371DS: CLC 0(2,R3),=C'/*' found REXX comment? HRC371DS 00098400
HRC371DS: BNE NOTREXX no, continue with EXEC HRC371DS 00098410
HRC371DS: * We have an exec written in REXX. Build new regular and HRC371DS 00098420
HRC371DS: * extended plists with REXX as the command name. HRC371DS 00098430
HRC371DS: MVC BUFFER1(256),0(R11) copy original plist HRC371DS 00098440
HRC371DS: MVC BUFFER1(8),=C'DMSREX ' overlay EXEC with REXX HRC371DS 00098450
HRC371DS: LA R1,BUFFER1 recover R1 HRC371DS 00098460
HRC371DS: ST R11,BUFFER0 HRC371DS 00098470
HRC371DS: ICM R1,8,BUFFER0 copy flag byte from original R1 HRC371DS 00098480
HRC371DS: MVC BUFFER0(7),=C'DMSREX ' insert command name HRC371DS 00098490
HRC371DS: L R3,0(R10) get start of eplist HRC371DS 00098500
HRC371DS: L R4,8(R10) end of old argstring HRC371DS 00098510
HRC371DS: MVC BUFFER0+7(249),0(R3) copy eplist HRC371DS 00098520
HRC371DS: SR R4,R3 compute length of old argstring HRC371DS 00098530
HRC371DS: LA R3,BUFFER0 HRC371DS 00098540
HRC371DS: ST R3,EPLIST store as eplist command HRC371DS 00098550
HRC371DS: LA R3,7(R3) start of arguments HRC371DS 00098560
HRC371DS: ST R3,EPLIST+4 store as eplist argbeg HRC371DS 00098570
HRC371DS: AR R3,R4 add length of arguments HRC371DS 00098580
HRC371DS: ST R3,EPLIST+8 store a eplist argend HRC371DS 00098590
HRC371DS: SR R3,R3 HRC371DS 00098600
HRC371DS: ST R3,EPLIST+12 HRC371DS 00098610
HRC371DS: LA R0,EPLIST point R0 at eplist HRC371DS 00098620
HRC371DS: * At last we invoke the REXX interpreter. HRC371DS 00098630
HRC371DS: SVC 202 should we set EXECRUN flag??? HRC371DS 00098640
HRC371DS: DC AL4(*+4) HRC371DS 00098650
HRC371DS: LR R3,R15 save return code from REXX HRC371DS 00098660
HRC371DS: DMSFRET DWORDS=66,LOC=WORK,TYPCALL=BALR HRC371DS 00098670
HRC371DS: LR R15,R3 recover return code HRC371DS 00098680
HRC371DS: BR R9 return to our caller HRC371DS 00098690
HRC371DS: * Return our memory, restore registers, and let EXEC proceed HRC371DS 00098700
HRC371DS: NOTREXX DS 0H continue with normal EXEC... HRC371DS 00098710
HRC371DS: DMSFRET DWORDS=66,LOC=WORK,TYPCALL=BALR HRC371DS 00098720
HRC371DS: DROP R8 HRC371DS 00098730
HRC371DS: LR R5,R9 recover R5 HRC371DS 00098740
HRC371DS: LR R0,R10 recover R0 HRC371DS 00098750
HRC371DS: LR R1,R11 recover R1 HRC371DS 00098760
HRC371DS: SPACE 1 HRC371DS 00098770
HRC371DS: ./ I 00230000 $ 230100 100 06/14/10 11:06:58
HRC371DS: SPACE 1 HRC371DS 00230100
HRC371DS: WORK DSECT HRC371DS 00230200
HRC371DS: BUFFER0 DS CL256 HRC371DS 00230300
HRC371DS: BUFFER1 DS CL256 HRC371DS 00230400
HRC371DS: EPLIST DS 4A HRC371DS 00230500
HRC371DS: FSCBD HRC371DS 00230600
BEGIN APPLY >>> ./ I 00041000 $ 41100 100 06/14/10 11:06:58
END APPLY >>> ./ I 00041000 $ 41100 100 06/14/10 11:06:58
BEGIN APPLY >>> ./ I 00051000 $ 51100 100 06/14/10 11:06:58
END APPLY >>> ./ I 00051000 $ 51100 100 06/14/10 11:06:58
BEGIN APPLY >>> ./ I 00060000 $ 60100 100 06/14/10 11:06:58
END APPLY >>> ./ I 00060000 $ 60100 100 06/14/10 11:06:58
BEGIN APPLY >>> ./ I 00071000 $ 71100 100 06/14/10 11:06:58
END APPLY >>> ./ I 00071000 $ 71100 100 06/14/10 11:06:58
BEGIN APPLY >>> ./ I 00098000 $ 98010 10 06/14/10 11:06:58
END APPLY >>> ./ I 00098000 $ 98010 10 06/14/10 11:06:58
BEGIN APPLY >>> ./ I 00230000 $ 230100 100 06/14/10 11:06:58
END APPLY >>> ./ I 00230000 $ 230100 100 06/14/10 11:06:58
Update Succeeded
Update Execution Time 23 milliseconds.
ibm/vm370-lib/cms/dmsexc.assemble_hst.txt · Last modified: 2023/08/06 13:35 by Site Administrator