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RMS-10_T10_704_FT2_880425
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10,7/rms10/rmssrc/rmsdsp.mac
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TITLE RMSDSP -- ENTRY VECTOR AND DISPATCH TABLE FOR RMS
SEARCH RMSINT,RMSMAC
$PROLOG
REPEAT 0,<
THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;COPYRIGHT (C) 1977, 1978 BY DIGITAL EQUIPMENT CORPORATION
NAME: RMSDSP
AUTHOR: S. BLOUNT
EDIT DATE: 5-MAY-77
FUNCTION: RMS-20 JSYS DISPATCHER
REVISION HISTORY:
EDIT DATE WHO PURPOSE
==== ==== === =======
1 5-MAY-77 SB CHANGE ENTRY DISPATCH VECTOR TO SYMBOLIC FORM
2 12-DEC-79 AU 1. CHANGE REGISTER USAGE SO THAT AC 1 COULD BE
USED THE ARGUMENT POINTER.
2. ADD CODE TO USE RMS'S OWN STACK.
3. MODIFY CODE TO SUIT NEW USER INTERFACE
*************************************************
* *
* NEW REVISION HISTORY *
* *
*************************************************
PRODUCT MODULE SPR
EDIT EDIT QAR DESCRIPTION
====== ====== ===== ===========
60 3 (MBROWN,SWE) (DAW, 2-Feb-82) Preserve registers 3 and 4;
return status in register 2 for every verb.
****************** Start RMS-10 V1.1 *********************
********************* TOPS-10 ONLY ***********************
PRODUCT MODULE SPR
EDIT EDIT QAR DESCRIPTION
====== ====== ===== ===========
101 4 Dev (RMT, 12/2/85) Update copyrights.
104 5 Dev (RMT, 12/2/85) Use AC0 instead of AC17
as BLT pointer so that PSI doesn't trash
the stack pointer.
105 6 Dev (RMT, 12/2/85) Don't overwrite program's
version number in JOBDAT
***** END OF REVISION HISTORY *****
>;;END OF REPEAT 0
;LOC 137 ;FOR VERSION # ON 10
;$VERS
$PURE
SUBTTL ENTRY POINTS TO RMS
RELOC 400000
ENTRY RMS.EV
; *** PUSHJ ENTRY LOGIC
;
RMS$10:: REPEAT XX$MAX,<JSP T2,CALDSP> ;[60] CREATE OFFSET TO IDENTIFY CALLED ROUTINE
SMNCPY::ASCIZ\
COPYRIGHT (C) BY DIGITAL EQUIPMENT CORPORATION 1979, 1986
ALL RIGHTS RESERVED.
\ ;
CALDSP: SUBI T2,RMS$10+1 ;[60] GET OFFSET INTO TABLE OF ADDRESSES
MOVEM T2,UJSYS ;[60] STORE IT AWAY
POP P,RETPC ;STORE RETURN ADDRESS AWAY
JRST SETUP ;AND CONTINUE AS IF THIS WERE A JSYS
; WITH THE /R OPTION, WHATEVER THAT MEANS
; *** JSYS ENTRY LOGIC
RMS.EV==:VECLNG,,VECTOR ;FOR SETTING RMS20 ENTRY VECTOR WITH LINK... /ST:RMS.EV
VECTOR: JRST RMS$20 ;ADDRESS OF NORMAL DISPATCHER
JRST RMS20I ;ADDRESS OF RMS INITIALIZATION ROUTINE
$VERS ;RMS VERSION #
UJSYS## ;PLACE TO STORE JSYS CODE FROM MONITOR
RETPC## ;PLACE TO STORE RETURN PC
VECLNG==.-VECTOR ;LENGTH OF ENTRY VECTOR
RMS$20::
SKIPA ;BYPASS TURN-OFF OF INITED FLAG
RMS20I: SETZM INTFLG## ;SIGNAL THAT THIS IS 1ST CALL
MOVE T2,UJSYS## ;[60] GET JSYS CODE
CAMLE T2,[RM$MAX] ;[60] JSYS TOO HIGH?
JRST E.JSYS ;YES
SUB T2,[RM$MIN] ;[60] COMPUTE JSYS OFFSET
MOVEM T2,UJSYS## ;[60] STORE OFFSET INTO TABLE
JRST SETUP ;MERGE WITH PUSHJ ENTRY
SUBTTL RMS COMMON ENTRY/EXIT CODE
;THIS ROUTINE IS THE FIRST ONE TO GET CONTROL AFTER A RMS MACRO
; HAS BEEN EXECUTED. IT PERFORMS THE FOLLOWING FUNCTIONS:
;
; 1. SAVE USER AC'S
; 2. DISPATCH TO PROPER RMS ROUTINE
;
;COME HERE ON EITHER A DIRECT CALL (PUSHJ) OR AN RMS-20 JSYS.
;
SETUP:
SKIPN INTFLG## ;1ST CALL?
JSP T4,RMSINI## ;YES, INIT RMS
MOVEM 17,USERAC##+17 ;SAVE LAST AC
MOVE 0,[1,,USERAC##+1];SET UP TO SAVE USER AC'S
BLT 0,USERAC##+16 ;SAVE THEM
MOVE 0,USERAC##+0 ;RELOAD AC 0
JRST RMSENT ;HOP OVER 1-TIME CODE PUT OUT BY $MAIN
$SCOPE (TOP-LEVEL)
$MAIN (RMSENT,TRAPERR,<IOWD PDLNG##,RMSTACK##>)
MOVEI T2,SU$SUC ;ASSUME A SUCCESSFUL CONCLUSION
MOVEM T2,USRSTS## ;STORE IT IN USER STATUS FIELD
SETZM USTOSF## ;START WITH NO STATUS SUGGESTION
SETZM OAFLAGS ;INDIC NO OPEN ACTIVITY EXTANT
SETZM USRSTV## ;CLEAR STATUS-VALUE
SETZM ERRADR## ;CLEAR ERROR ADDRESS
PUSH 17,T1 ;PUSH CONTROL BLOCK addr
PUSH 17,[0] ;PUSH DUMMY ARG. ALL VERB MODULES EXPECT 2 ARGUMENTS ON STACK
MOVE T3,UJSYS## ;GET OFFSET INTO TABLE
PUSHJ 17,@DSPTAB(T3) ;DISPATCH TO USER ROUTINE
;DOESNT RETURN
SUBTTL EXIT CODE
UA%BLK==1 ;?AB ADDRESS ORIG PASSED IN AC1
TRAPERR: ;ABORTIVE ERROR OCCURRED
MOVEI T1,ER$BUG ;RET BUG VAL
MOVEM T1,USRSTV## ; IN 2NDARY STATUS FIELD
MOVE T2,USRSTS## ;IS THERE ANOTHER CODE ALREADY?
CAIN T2,SU$SUC ;JUMP IF YES
MOVEM T1,USRSTS## ;NO, SET AS PRIMARY CODE TOO
JRST USRFOK ;SKIP OABORT CHK
E.JSYS:
$CALLB TX$TOUT##,<RM$IJC##,UJSYS##,RETPC##>
;INVALID JSYS CODE x AT LOC y
MOVEI T2,ER$BUG ;HALT USER WITH BAD JSYS CODE
MOVEM T2,USRSTS## ;JUST GIVE A STATUS CODE
SETZM USRSTV## ;NO SUBSID CODE
JRST USRJAB ;ON RETURN
USRERR:: ;COME HERE ON BAD RETURN FROM RMS
JFCL ;NO-OP, HERE ONLY TO PROVIDE PLACE TO SET BRK-PT
USRRET:: ;COME HERE ON GOOD RETURN FROM ALL RMS MACRO'S
SKIPN OAFLAGS## ;OPEN LEFT HANGING?
$SKIP ;YES
$CALLB OABORT,<[0]> ;TELL OABORT USRSTS ALREADY SET, SO RET IN LINE
$ENDIF
USRFOK: ;FILE ENVIR GUARAN OK BY HERE
MOVE 0,[USERAC##+1,,1]; SET UP BLT
BLT 0,17 ;RESTORE USER AC'S (BUT AM ALLOWED TO CLOB 2-4)
MOVE 0,USERAC##+0 ;RESTORE AC 0
USRJAB: ;BAD JSYS CODE
MOVE T2,USRSTV## ;[4] GET STATUS VALUE
$STORE T2,STV,(UA%BLK) ;[4] STORE IT IN CONTROL BLOCK
HRRZ T2,USRSTS## ;GET THE USER'S ERROR CODE
$STORE T2,STS,(UA%BLK) ;STORE IT IN CONTROL BLOCK
CAIGE T2,.ERBAS ;IS IT AN ERROR CODE(.GEQ. 300000?)
JRST @RETPC## ;NO, EXIT THRU RETURN PC
DMOVEM T3,USERAC+T3 ;[60] Make sure ACs don't get smashed.
MOVE T4,RETPC ;GET ADDRESS TO RETURN TO
MOVE T3,(T4) ;GET INSTRUCTION THERE
HLLZ T4,T3 ;[60] CHECK ONLY OP-CODE
CAMN T4,[JUMP 16,] ;[60] IS IT AN ERJMP?
JRST DOJMP ;YES, "GOTO" ERROR ADDRESS
CAME T4,[JUMP 17,] ;[60] IS IT ERCAL?
JRST RETILN ;[60] No, illegal call (Didn't use RMS macro).
;[60] So just return in-line.
MOVE T4,RETPC ;[60] Get return PC
ADDI T4,1 ;SIMULATE PUSHJ AT LOCATION OF ERCAL
PUSH P,T4 ;...BY PUSHING @RETPC+1 ON STACK
DOJMP: HRRZM T3,USERAC ;[60] Address to return to
DMOVE T3,USERAC+T3 ;[60] Restore ACS 3 and 4
JRST @USERAC ;[60] Transfer to user routine.
RETILN: DMOVE T3,USERAC+T3 ;[60] Restore ACs
JRST @RETPC ;[60] Return.
$ENDMAIN
$ENDSCOPE(TOP-LEVEL)
SUBTTL RMS DISPATCH TABLE
DEFINE RMSVRB(NAME)<$'NAME##> ;;FOR PUSHJ INDIRECT TO ACTUAL PROCESSING IN RMS
DSPTAB:
RMSVRB (OPEN)
RMSVRB (CLOSE)
RMSVRB (GET)
RMSVRB (PUT)
RMSVRB (UPDATE)
RMSVRB (DELETE)
RMSVRB (FIND)
RMSVRB (TRUNCATE)
RMSVRB (CONNECT)
RMSVRB (DISCONNECT)
RMSVRB (CREATE)
RMSVRB (DEBUG)
RMSVRB (RELEASE)
RMSVRB (FLUSH)
RMSVRB (MESSAGE)
RMSVRB (NOMESSAGE)
RMSVRB (DISPLAY)
RMSVRB (ERASE)
RMSVRB (FREE)
RMSVRB (UTLINT)
END