Google
 

Trailing-Edge - PDP-10 Archives - bb-h240e-bm_decnet-20_v4_0_dist - tools/dnsnup.mac
There are 9 other files named dnsnup.mac in the archive. Click here to see a list.
; UPD ID= 58, SNARK:<6.1.UTILITIES>DNSNUP.MAC.9,  16-Dec-84 20:20:24 by GLINDELL
;Do not search for DF.XMT in ROUTER explicitly - anywhere will do
; UPD ID= 22, SNARK:<6.1.UTILITIES>DNSNUP.MAC.8,  28-Jul-84 10:39:19 by NICHOLS
;Allow alternate symbols in checks added by edit 18
; UPD ID= 21, SNARK:<6.1.UTILITIES>DNSNUP.MAC.7,  26-Jul-84 06:55:38 by DMCDANIEL
; Change last KF.XMT to DF.XMT.
; UPD ID= 18, SNARK:<6.1.UTILITIES>DNSNUP.MAC.6,  16-Jul-84 08:11:31 by PALMIERI
;Check values of message block/MSD symbols against those of the running
;monitor to detect any version skew.
;SNARK:<6.1.UTILITIES>DNSNUP.MAC.4  2-Apr-84 17:32:35, Edit by NICHOLS
;Call APRSRV subrs UPDTCK and LGTAD for date/time to be accurate
; to the millisecond
;SNARK:<6.1.UTILITIES>DNSNUP.MAC.2  2-Apr-84 17:23:14, Edit by NICHOLS
;Add code to store input and output Line Ids
;Change KF.QOB to KF.XMT for newer monitors.  EDIT by PALMIERI
; CHANGE KF.XMT TO KF.QOB SO IT WILL ASSEMBLE FOR KL2102. BRANNON
;WORK:<NICHOLS>DNSNUP.MAC.8 26-Jan-84 16:37:15, Edit by NICHOLS
;Fix circular buffer logic at BP0
;<6.1.MONITOR>DNSNUP.MAC.6, 30-Mar-83 14:48:39, Edit by CHALL
;Correct ungrammatical error message
;<GRANT.DECNET.5>DNSR.MAC.5, 13-Apr-81 11:41:10, EDIT BY GRANT
;Internal message header now 7 words, was 4
;<PERF-TOOLS>DNSR.MAC.14, 25-Mar-81 11:18:44, EDIT BY GRANT
;Add new object types
;Print out object number as well as descriptive string
;<PERF-TOOLS>DNSR.MAC.11, 31-Oct-80 16:56:10, EDIT BY MURPHY
;COMBINED DNSEND AND DNREAD AGAIN
	TITLE DNSNUP - SNOOP PROGRAM TO COLLECT DECnet MESSAGES
	SEARCH PROLOG,MACSYM,MONSYM,D36PAR,SCPAR,NIPAR
	SALL
	.REQUIRE REL:SYMSUB

	EXTERN ST2ADR,ADR2ST
	SUBTTL Declarations

;Items in data block

MAXMSG==<^D600+3/4>		;MAX LENGTH OF MESSAGE IN WORDS
TABLEN==6000			;WORDS IN THE CIRCULAR BUFFER
NBPT==3				;NUMBER OF BREAKPOINTS
CCZCHN==0			;^Z CHANNEL
OPDEF IFIW [1B0]		;INSTRUCTION FORMAT INDIRECT WORD
PIOFF==400
PION==200

I=P6				;INDEX FOR RELOCATABLE CODE

RC=13				;ROUTER CIRCUIT BLK PTR FROM ROUTER.MAC

	PURGE P6

BPRPAG==100			;BREAK-POINT PAGE IN USER-SPACE
BPRCOD==BPRPAG_11		;BREAK-POINT ADDRESS IN USER-SPACE
	SUBTTL Structure Definitions
;
;Note that these BEGSTRs are copied in DNTATL, the formatting
;program for this trace.

BEGSTR FH			;File header
	WORD	LNG		;Length of this header
	FIELD	FLG,9		;Flags to indicate what kind of entry
	FIELD	TYP,9		;Entry type
		TYP.FH==1	;  Entry type of file header
	HWORD	MGL		;Length of the message block
	WORD	UPT		;UPTIME corresponding to UDT below
	WORD	UDT		;UDT corresponding to UPT above
	WORD	PVR		;Trace program version number (location 137)
	WORD	MVR		;Monitor version number
	WORD	CFG,5		;CONFIG string fom this monitor
ENDSTR

BEGSTR	MH			;Message header
	WORD	LNG		;Length of entire entry
	FIELD	FLG,6		;Flags to indicate what kind of entry
	FIELD	IOL,3		;Input, output or local
		XP IOL.IN,1	;Input (avoid zero for error detection)
		XP IOL.OT,2	;Output message
		XP IOL.LO,3	;Local message
	FIELD	TYP,9		;Entry type
		TYP.MH==2	;  Entry type of message record
	HWORD	LST		;Cumulative count of lost messages
	WORD	UPT		;UPTIME as of entry
	WORD	UDT		;UDT as of entry
	WORD	OMB		;Original MB pointer
	WORD	ILN		;Input Line ID (or zero if none)
	WORD	OLN		;Output Line ID (or zero if none)
ENDSTR

	SUBTTL Start of Program
;TOP

	BLOCK 1000

TIMER:	RESET
	MOVE P,[IOWD PDLEN,PDL]
	CALL CHKSNP		; Check to see if our D36PAR symbols match
				;  the values that the monitor has for them
	XMOVEI I,BPRCOD		;GET USER-MODE INDEX FOR RELOCATABLE STORAGE
	XJRSTF [0
		REL3]
	ERJMP .+1
	TDZA T1,T1		;ZERO = WE HAVE NO EXTENDED ADDRESSING
REL3:	SETO T1,		;NON-ZERO = WE HAVE EXTENDED ADDRESSING
	MOVEM T1,MONTYP(I)
	MOVEI T1,.FHSLF		;SET UP PSI SYSTEM TO GET ^Z WHICH STOPS SNOOP
	MOVE T2,[LEVTAB,,CHNTAB]
	SIR
	EIR
	MOVE T2,[1B<CCZCHN>]
	AIC
	MOVE T1,[.TICCZ,,CCZCHN]
	ATI			;ENABLE ^Z INTERRUPT
	SETZM CMNBLK+.CMFLG	;CLEAR OUT RESCAN ADDRESS AND FLAGS
	MOVX T1,<XWD .PRIIN,.PRIOU> ;GET INPUT AND OUTPUT JFN
	MOVEM T1,CMNBLK+.CMIOJ	;SAVE IT IT THE COMMAND. BLOCK
	MOVE T1,[POINT 7,[ASCIZ |Output File: |]] ;GET THE PROPMT TEXT
	MOVEM T1,CMNBLK+.CMRTY	;SAVE IT
	MOVE T1,[POINT 7,TXTBUF] ;POINT TO THE TEXT BUFFER
	MOVEM T1,CMNBLK+.CMBFP	;BUFFER POINTER
	MOVEM T1,CMNBLK+.CMPTR	;AND POINTER TO NEXT TO BE PARSED
	MOVEI T1,^D132*5	;GET THE LENGTH OF THE BUFFERS
	MOVEM T1,CMNBLK+.CMCNT	;SAVE IT
	SETZM CMNBLK+.CMINC	;CLEAR OUT THE COUNT OF CHARS LEFT
	MOVE T1,[POINT 7,ATOM]	;POINT TO THE ATOM BUFFER
	MOVEM T1,CMNBLK+.CMABP	;SAVE IT
	MOVEI T1,^D132*5	;GET THE LENGTH
	MOVEM T1,CMNBLK+.CMABC	;AND SAVE THAT TOO
	MOVEI T1,JFNARG		;GET THE POINTER TO THE JFN BLOCK
	MOVEM T1,CMNBLK+.CMGJB	;SAVE IT
	MOVEI T1,CMNBLK		;POINTER TO BLOCK
	MOVEI T2,[FLDDB.(.CMINI)] ;INIT THE LINE
	COMND			;DO IT

RESC:	MOVEI T2,[FLDDB.(.CMOFI,<CM%DPP+CM%HPP+CM%SDH>,0,<FILE FOR LOGGING>,<DECNET.MSG>)]
	COMND			;SCAN IT OFF
	TXNE T1,CM%RPT		;HAVE TO DO A RESCAN FROM HERE?
	 JRST RESC		;YES,THEN DO IT
	MOVEM T2,FILJFN		;SAVE THE JFN FOR LATER
	MOVEI T2,[FLDDB.(.CMCFM)] ;WAIT FOR CONFIRM
	COMND			;HERE

	SETZM INDEX(I)
	SETZM TOTAL(I)
	SETZM PNTR(I)
	SETZM LAST
	SETZM LPRINT
	SETZM LSTTOD
	SETZM ITIME
	SETZM LTOD(I)
	SETZM TABLE(I)
	HRLI T1,TABLE(I)
	HRRI T1,TABLE+1(I)
	BLT T1,TABLE+TABLEN-1(I)
	SETZM OVRFLO(I)
	MOVEI T1,.SNPLC
	MOVEI T2,<BPRLEN+777>/1000
	MOVEI T3,BPRPAG
	SNOOP			;INITIALIZE THE BREAK POINTS
	 JSP T1,ERROR
	LSH T2,11		;CHANGE MONITOR PAGE # TO MONITOR ADDRESS
	MOVEM T2,INDEX(I)	;STORE FOR RELOCATABLE CODE
	; ..
	SUBTTL RELOCATE BREAKPOINT CODE

	; ..
	MOVSI Q1,-INSTBL
TIMER1:	HLRZ T1,INSTAB(Q1)
	HRRZ T2,INSTAB(Q1)
	ADD T2,INDEX(I)
	HRRM T2,BPRCOD(T1)
	AOBJN Q1,TIMER1

;LOOK UP SYMBOLS

	MOVSI Q1,-SYMTBL
	JUMPE Q1,TIMER4
TIMER2:	MOVEI T1,.SNPSY
	MOVE T2,SYMTAB(Q1)
	MOVE T3,SYMTAB+1(Q1)
	SNOOP
	 JSP T1,ERROR
	HLRE T3,SYMTAB+2(Q1)	;GET SYMBOL OFFSET
	ADD T2,T3		;ADJUST VALUE BY OFFSET
	HRRZ T3,SYMTAB+2(Q1)
	CAIL T3,TIMER		;IN LOCAL CODE?
	ADDM T2,0(T3)		;YES
	CAIGE T3,TIMER		;IN BREAKPOINT CODE?
	ADDM T2,BPRCOD(T3)
	ADD Q1,[2,,2]
	AOBJN Q1,TIMER2

;SET BREAKPOINTS

TIMER4:	MOVSI Q1,-NBPT
SETBP1:	MOVEI T1,.SNPDB
	MOVEI T2,1(Q1)
	MOVE T3,BP1ADR(Q1)
	SKIPE MONTYP(I)
	JRST [	HLRZ T4,BPI(Q1)	;EXT ADR BP ROUTINE ENTRY
		HRLI T4,(XPCW)	;CONSTRUCT BP INSTRUCTION
		JRST SETBP2]
	HRRZ T4,BPI(Q1)
	HRLI T4,(JSR)		;CONSTRUCT BP INSTRUCTION
SETBP2:	ADD T4,INDEX(I)
	TLZ T4,37
	SNOOP
	 JSP T1,ERROR
	AOBJN Q1,SETBP1

;OPEN OUTPUT FILE FOR DATA

	MOVE T1,FILJFN
	MOVE T2,[440000,,OF%RD+OF%WR]
	OPENF
	 JRST ERROPN

;START SNOOPING

	MOVEI T1,.SNPIB
	SNOOP
	 JSP T1,ERROR
	HRROI T1,[ASCIZ/
Type ^Z to stop snooping   /]
	PSOUT

	MOVE T1,EXMADR(I)	;GET THE POINTER TO THE PLACE TO PUT IT
	ADD T1,I		;ADD IN THE INDEX
	MOVEI T2,FH.LEN		;SIZE OS THIS ENTRY
	MOVEM T2,FH.LNG(T1)	;SAVE THE LENGTH
	MOVSI T2,TYP.FH		;GET THE TYPE
	HRRI T2,MB.LEN		;GET THE LENGTH OF THE MESSAGE BLOCK
	MOVEM T2,FH.FLG(T1)	;SAVE IT

	PUSH P,T1		;SAVE T1
	GTAD			;GET THE UDT
	MOVE T3,T1		;SAVE IT
	TIME			;GET THE UPTIME
	MOVE T2,T1		;AND SAVE IT
	POP P,T1		;AND RESTORE PDL
	DMOVEM T2,FH.UPT(T1)	;SAVE IT IN THE HEADER
	SETZM FH.PVR(T1)	;ZERO VERSION NUMBER
	ADDI T1,FH.LEN		;GET THE LENGTH
	SUB T1,I		;SUBTRACT OFF INDEX
	MOVEM T1,DEPADR(I)	;STORE IT
	AOS PENMSG(I)		;INCREMENT NUMBER OF PENDING MESSAGES

TIMER3:	SKIPE P2,PENMSG(I)	;ANY MESSAGES PENDING?
	 JRST REDMSG		;YES, THEN READ THE MESSAGE INTO FILE

	SKIPE QUITF		;HAVE TO STOP NOW?
	 JRST TYPANS		;RIP OUT SNOOP POINTS AND DO PENDING OUTPUT

SNOOZE:	MOVEI T1,^D50		;SLEEP FOR
WAITX:	DISMS			;THIS MUCH TIME
	JRST TIMER3		;AND CONTINUE

;^Z INTERRUPT TO STOP DATA COLLECTION

CCZINT:	MOVEM T1,INTAC1		;SAVE AN AC
	SETOM QUITF		;SET FLAG TO QUIT
	HRRZ T1,PIPC2		;CHECK PC
	CAIN T1,WAITX+1		;AT DISMS?
	MOVEI T1,TIMER3		;YES, DEBRK TO TIMER3
	HRRM T1,PIPC2
	MOVE T1,INTAC1
	DEBRK

LEVTAB:	PIPC1
	PIPC2
	PIPC3

CHNTAB:	2,,CCZINT
	BLOCK ^D35
	SUBTTL RAW DATA OUTPUT

TYPANS:	MOVEI T1,.SNPUL		;PULL OUT ALL OUR SNOOP POINTS
	SNOOP			;FROM THE MONITOR
	 JSP T1,ERROR		;BAD BAD ERROR

TYPAN1:	HRRZ T1,FILJFN
	TLO T1,400000
	CLOSF
	 JRST ERRCLS
	HRROI T1,[ASCIZ/
[DNTATL will format the output for you]/
]
	PSOUT
	HALTF			;ALL DONE
	SUBTTL CHKSNP - Check a few symbols

;Here to see if a few of our compiled in symbol values agree with those
; the monitor we are snooping on has.

DEFINE CKSYMS,<
;;		Symbol,Alternate,Module (any module or global if blank)
	CHKSYM (DF.XMT,		,	)
	CHKSYM (MB.LEN,		,	)
	CHKSYM (MD.ALA,	$MDALA	,	)
	CHKSYM (MD.ALL,	$MDALL	,	)
	CHKSYM (MD.BYT,	$MDBYT	,	)
	CHKSYM (UD.DAT,	$UDDAT	,	)
	CHKSYM (UD.MSD,	$UDMSD	,	)
>;END OF DEFINE CKSYMS

DEFINE CHKSYM (sym,altsym,module,%tag1,%tag2),<
	MOVX T1,.SNPSY		;;Snoop for a symbol value
	MOVE T2,[RADIX50,sym]   ;;In particular, sym
IFB  <module>,<SETZ T3,>        	 ;;No particular module
IFNB <module>,<MOVE T3,[RADIX50,module]> ;;This particular module
	SNOOP%			;;Return value in T2
	  JRST %tag1            ;;Can't find this symbol in monitor
	CAIN T2,sym		;;Same as our value?
	JRST %tag2              ;;Yes, success

	TMSG <?Symbol SYM in DNSNUP does not agree with value in monitor.
   Please recompile DNSNUP with correct D36PAR.UNV.>
	HALTF

%tag1:!
IFB <altsym>,<
	TMSG <?Can't get symbol SYM from monitor via SNOOP JSYS>
	HALTF
>;end of IFB <altsym>

IFNB <altsym>,<
	MOVX T1,.SNPSY		 ;;Snoop for a symbol value
	MOVE T2,[RADIX50,altsym] ;;In particular, altsym
IFB  <module>,<SETZ T3,>        	 ;;No particular module
IFNB <module>,<MOVE T3,[RADIX50,module]> ;;This particular module
	SNOOP%			;;Return value in T2
	 IFNSK.
	  TMSG <?Can't get symbol SYM or ALTSYM from monitor via SNOOP JSYS>
	  HALTF
	 ENDIF.
	CAIN T2,sym		;;Same as our value?
	 IFSKP.
	  TMSG <?Symbol ALTSYM in DNSNUP does not agree with value in monitor.
   Please recompile DNSNUP with correct D36PAR.UNV.>
	  HALTF
	 ENDIF.	  
>;END OF IFNB <altsym>
%tag2:!                         ;;Success
>;END OF DEFINE CHKSYM

CHKSNP:	CKSYMS                  ;Check the symbols, exit if mismatch
	RET                     ;If we get here, all is OK
ERROR:	HRROI T1,[ASCIZ |?Fatal error occurred while snooping: |]
	PSOUT
	MOVX T1,.PRIOU		;DESTINATION DESIGNATOR
	MOVX T2,<.FHSLF,,-1>	;MY LAST ERROR
	MOVX T3,0		;UNLIMITED ERRSTR LENGTH
	ERSTR
	HALTF

ERROPN:	TMSG	<?Unable to open trace file>
	HALTF

ERRCLS:	TMSG	<?Unable to close trace file>
	HALTF

	SUBTTL REDMSG - Output to the message file

REDMSG:	MOVE P3,EXMADR(I)	;GET ADDRESS OF NEXT MESSAGE
	ADD P3,I		;ADD IN THE OFFSET
	SKIPLE T1,@P3		;GET LENGTH OF THE ENTRY
	 JRST OUTMSG		;LENGTH IS GOOD, SEND IT OUT
	JUMPE T1,[TMSG <?Zero length message encountered in buffer>
		  JRST TYPANS]	;CLOSE THE FILE AND EXIT NOW
	MOVE P3,ORGADR(I)	;GET THE ORIGINAL ADDRESS
	MOVEM P3,EXMADR(I)	;STORE IT
	ADD P3,I		;RELOCATE IT
	XMOVEI T1,@P3		;LENGTH OF MESSAGE TO COPY
OUTMSG:	MOVE T2,P3		;GET COPY OF ADDRESS IN T2
OUTMS1:	SETZ T4,		;NUMBER OF WORDS LEFT OVER FOR NEXT PASS

	MOVE T1,FILJFN		;GET THE OUTPUT JFN
	MOVX T2,<POINT 36,(I)>	;GET AN INDEXED BYTE POINTER
	HRR T2,EXMADR(I)	;GET THE POINTER TO THE DATA
	MOVN T3,(P3)		;GET THE LENGTH OF THE MESSAGE IN WORDS

OUTMS2:	SETZ T4,		;TERMINATING BYTE
	SOUT			;OUTPUT IN DUMP MODE
	 ERJMP OUTERR		;OUTPUT ERROR, DIE

	ADD P3,MH.LNG(P3)	;ADD IN THE LENGTH OF THE MESSAGE
	SUB P3,I		;SUBTRACT OFF THE INDEX
	SKIPGE P3		;GONE NEGATIVE
	 MOVE P3,ORGADR(I)	;GET THE ORIGINAL BACK
	MOVEM P3,EXMADR(I)	;THIS WILL BE OUR NEXT ADDRESS
	SOSG PENMSG(I)		;ANY MORE MESSAGE
	 JRST TIMER3		;RETURN TO SEE IF ANYMORE
	JRST REDMSG		;DO THE NEXT ONE THEN

OUTERR:	TMSG	<?File Output error>
	JRST	TYPANS		;GIVE UP NOW


	SUBTTL Breakpoints

;BREAKPOINT INSTRUCTIONS

DEFINE BPTR (Q)<
	BPTR1(\Q)>

   DEFINE BPTR1 (Q)<
	XBP'Q'R,,BP'Q'R>

BPI:
   XX==0
   REPEAT NBPT,<
	BPTR XX
	XX=XX+1>

DEFINE SYM (NAME,PTR,MODUL,OFFSET)<
	RADIX50 0,NAME
   IFNB <MODUL>,<RADIX50 0,MODUL>
   IFB <MODUL>,<0>
   IFNDEF NAME,<
NAME:>
	XWD OFFSET,PTR>

FILBUF:	BLOCK	^D256		;ENOUGH FOR A VERY BIG MESSAGE
QUITF:	BLOCK	1
JFNARG:	BLOCK	^D16
ATOM:	BLOCK	^D<132>
TXTBUF:	BLOCK	^D<132>
CMNBLK:	BLOCK	.CMGJB+1
OUTJFN:	0
FILJFN:	0
LAST:	0
LPRINT:	0
LSTTOD:	0
NXTTCK:	0
ITIME:	0

BP1ADR:	0			;MONITOR ADDR OF BP 1 (RECEIVED MSGS)
BP2ADR:	0			;MONITOR ADDR OF BP 2 (SENT MSGS)
BP3ADR:	0			;MONITOR ADDR OF BP 3 (LOCAL MSGS)
	STRNGL==20
STRING:	BLOCK STRNGL

SYMBOL:	BLOCK 10

	PRGNML==40
PRGNAM:	BLOCK PRGNML

FRKCNT:	0
	FRKTBL==1000
FRKTAB:	BLOCK FRKTBL

	PDLEN==100
PDL:	BLOCK PDLEN


;MACROS FOR GENERATING MONITOR AND LOCAL REFERENCES IN RELOCATED CODE

;MONITOR SYMBOL REFERENCE

DEFINE MONREF (INST,MSY,%TAG)<
%TAG:!	INST
	MONRR <SYM MSY,%TAG
>>

;SET OF REMOTE MACROS FOR ABOVE

DEFINE MONRR (..XXX)<
	MONRR2 <..XXX>,
>

DEFINE MONRR2 (..NEW,..OLD)<
   DEFINE MONRR (..XXX)<
	MONRR2 <..XXX>,<..OLD
	..NEW
>>>

DEFINE MONRH <
   DEFINE MONRR2 (..NEW,..OLD)<
	..OLD>
   MONRR ()>

;LOCAL SYMBOL REFERENCE

DEFINE LOCREF (INST,LSY,%TAG)<
%TAG:!	INST
	LOCRR < %TAG,,LSY
>>

;SET OF REMOTE MACROS FOR ABOVE

DEFINE LOCRR (..XXX)<
	LOCRR2 <..XXX>,
>

DEFINE LOCRR2 (..NEW,..OLD)<
   DEFINE LOCRR (..XXX)<
	LOCRR2 <..XXX>,<..OLD
	..NEW
>>>

DEFINE LOCRH <
   DEFINE LOCRR2 (..NEW,..OLD)<
	..OLD>
   LOCRR ()>

DEFINE BP (Q)<
 XBP'Q'R:0
	0
	0
	LOCREF <1,,0>,XBP'Q'

 BP'Q'R: 0
 XBP'Q':	CONO PI,PIOFF

   >

DEFINE ENDBP (Q)<
	MOVE I,SAV1I(I)
	CONO PI,PION
	LOCREF <SKIPE>,MONTYP
	LOCREF <XJRSTF>,XBP'Q'R
	LOCREF <JRSTF @0>,BP'Q'R>

	LIT

	SUBTTL Relocatable Code for SNOOPing

LOC BPRPAG_11
PHASE 0				;RELOCATABLE CODE INDEXED BY I

BPR:				;START OF RELOCATABLE CODE FOR LENGTH CALC

BP (0)
	LOCREF <MOVEM I,>,SAV1I
	LOCREF <MOVE I,>,INDEX
	MOVEM Q1,SAV1Q1(I)
	MOVEI Q1,IOL.IN		;THIS IS BPT 1, RECEIVED MESSAGES
	JRST BP0(I)		;DO THE WORK
RBP0:	MOVE Q1,SAV1Q1(I)	;RETURN TO RBP0
	ENDBP (0)


BP (1)
	LOCREF <MOVEM I,>,SAV1I
	LOCREF <MOVE I,>,INDEX
	MOVEM Q1,SAV1Q1(I)
	MOVEI Q1,IOL.OT		;THIS IS BPT 2, SENT MESSAGES
	CAXN T1,DF.XMT		;IS IT A TRANSMIT REQUEST?
	 JRST BP0(I)		;YES, DO THE WORK
RBP1:	MOVE Q1,SAV1Q1(I)	;RETURN TO RBP1
	ENDBP (1)
BP (2)
	LOCREF <MOVEM I,>,SAV1I
	LOCREF <MOVE I,>,INDEX
	MOVEM Q1,SAV1Q1(I)
	MOVEI Q1,IOL.LO		;THIS IS BPT 3, LOCAL MESSAGES
	JRST BP0(I)		;DO THE WORK
RBP2:	MOVE Q1,SAV1Q1(I)	;RETURN TO RBP2
	ENDBP (2)
	SUBTTL Common Code for SNOOP Break Points

;Note that the SNOOP code is assumed to be executing in section 1, and
;that references to data contained in the SNOOP code are assumed to be local.

;We arrive at the SNOOP break point with register MB pointing to the
;message block being traced.

IFN MDALA+1,<
	PRINTX ?Code at BP0 Depends on MDALA being a full-word, its not>
IFN MDBYT+1,<
	PRINTX ?Code at BP0 depends on MDBYT being a full-word, its not>
IFN MDALL-777777,<
	PRINTX ?Code at BP0 depends on MDALL being a RH-word, its not>

BP0:	DMOVEM T1,SAV1T1(I)	;I ALREADY SAVED AND SET UP
	DMOVEM T3,SAV1T3(I)

	MOVEI T2,<MB.LEN+MH.LEN>*4 ;GET MINIMUM COPY LENGTH
	XMOVEI T4,UD.DAT(MB)	   ;GET PTR TO USER DATA AREA OF MSG BLK
	CAMN T4,MD.ALA+UD.MSD(MB)  ;IS USER DATA IN THE MESSAGE BLOCK?
	JRST NOUBLK(I)		   ;YES
	  ADD T2,MD.BYT+UD.MSD(MB) ;NO, ADD IN THE LENGTH OF USER DATA
	  ADDI T2,7*4		   ;ADD FUDGE WORDS TO COVER OFFSETS
NOUBLK:	ADDI T2,3		;MAKE SURE WE END UP ON A WHOLE WORD
	ASH T2,-2		;CONVERT IT TO WORDS
	CAILE T2,MAXMSG+MB.LEN+MH.LEN ;MORE THAN WE ALLOW ONE ENTRY TO BE?
	 MOVX T2,MAXMSG+MB.LEN+MH.LEN ;YES, USE MAX

	SKIPN T3,DEPADR(I)	;GET DEPOSIT (PUTTER) ADDRESS
	 JRST BP1A(I)		;NOT SET UP, DROP THIS MESSAGE
	MOVE T4,T3		;CALC END OF RANGE WE'LL COPY INTO
	ADD T4,T2		;ADD IN LENGTH OF MSG IN WORDS
	CAMGE T4,TOPADR(I)	;WOULD WE GO PAST END OF CIRCULAR BUFFER?
	JRST NOWRAP(I)		;NO
	  ADD T3,I		;YES, MAKE ABSOLUTE ADDR
	  SETOM (T3)		;TELL USER-MODE WE ARE WRAPPING NOW
	  MOVE T3,ORGADR(I)	;GET ADDR OF ORIGINAL TOP OF BUFFER
	  MOVE T4,T3		;CALC END OF RANGE WE'LL COPY INTO
	  ADD T4,T2		;ADD IN LENGTH OF MSG IN WORDS
NOWRAP:	CAMGE T3,EXMADR(I)	;START OF NEW RANGE BELOW TAKER?
	 CAMGE T4,EXMADR(I)	;YES, END OF NEW RANGE ABOVE TAKER?
	  TRNA			;NO, THEN COPY NEW MSG INTO CIRC BUFFER
	   JRST FULLBF(I)	;YES, WRAP AROUND, PUNT AND COUNT A LOST MSG

	ADD T3,I		;MAKE T3 ABSOLUTE ADDR OF COPY TARGET
	STOR T2,MHLNG,(T3)	;SAVE LENGTH OF THIS ENTRY
	DPB Q1,[POINTR(MH.IOL(T3),MHIOL)](I) ; 1=INPUT, 2=OUTPUT, 3=LOCAL
	MOVX T1,TYP.MH		;RECORD TYPE IS 'MESSAGE HEADER'
	DPB T1,[POINTR(MH.TYP(T3),MHTYP)](I) ; SAVE THE TYPE
	MOVE T1,LSTMSG(I)	;CUMULATIVE NUMBER
	STOR T1,MHLST,(T3)	; OF LOST MESSAGES

	MONREF (<CALL>,UPDTCK)	;GET SYSTEM UP TIME IN MS
	STOR T1,MHUPT,(T3)	;SAVE TIME STAMP FOR ENTRY

	MONREF (<CALL>,LGTAD)	;COMPUTE DAYS AND FRACTION
	STOR T1,MHUDT,(T3)	;SAVE IT IN MESSAGE HEADER

	LOAD T1,RCLID,(RC)	;GET LINE ID FROM CIRCUIT BLOCK
	STOR T1,MHILN,(T3)	;STORE AS INPUT CIRCUIT POINTER
	STOR T1,MHOLN,(T3)	;ALSO STORE AS OUTPUT CIRCUIT POINTER

	STOR MB,MHOMB,(T3)	;SAVE ORIGINAL MESSAGE BLOCK POINTER
	ADDI T3,MH.LEN		;POINT TO THE END OF THE HEADER

	MOVE T2,MB		;GET SOURCE POINTER
	MOVEI T1,MB.LEN		;GET NUMBER OF WORDS TO MOVE
	EXTEND T1,BLTINS(I)	;DO THE EXTEND
	XMOVEI T2,UD.DAT(MB)	;GET THE POINTER TO THE USER DATA
	CAMN T2,MD.ALA+UD.MSD(MB) ;WAS THE USER DATA WITHIN THE MB?
	 JRST GIVUSR(I)		;YES, THEN JUST GIVE CURRENT STUFF TO USER

	MOVE T1,MD.BYT+UD.MSD(MB) ;GET LENGTH OF USER DATA IN BYTES
	ADDI T1,7*4		  ;ADD FUDGE WORDS TO COVER OFFSETS
REPEAT 0,<
	HRRZ T3,MD.ALL+UD.MSD(MB) ;LOAD ALLOCATED LENGTH 
	CAMLE T1,T2		  ;MORE THAN ALLOCATED LENGTH?
	 MOVE T1,T2		  ;YES, USE ALLOCATED LENGTH?
>
	ADDI T1,3		   ;ROUND UP
	ASH T1,-2		   ;CONVERT BYTE COUNT TO WORD COUNT
	MOVE T2,MD.ALA+UD.MSD(MB)  ;PTR TO USER DATA BLOCK (SOURCE FOR XBLT)
	EXTEND T1,BLTINS(I)	   ;XBLT THE USER DATA BLOCK

GIVUSR:	SUB T3,I		;SUBTRACT OFF THE INDEX REGISTER
	MOVEM T3,DEPADR(I)	;SAVE NEW DEPOSIT ADDRESS
	AOS T1,PENMSG(I)	;INCREMENT NUMBER OF PENDING MESSAGES
	JRST BP1A(I)		;AND DO THE NORMAL FINISH CODE
FULLBF:	AOS T1,LSTMSG(I)	;INCREMENT NUMBER OF LOST MESSAGES

BP1A:	ADDI Q1,-1(I)		;Q1 HAS BP # (1,2 OR 3)
	XMOVEI Q1,@[IFIW RBP0(I)      ;RETURN ADDR FOR BP0 (RECEIVED MSG)
		    IFIW RBP1(I)      ;RETURN ADDR FOR BP1 (SENT MSG)
		    IFIW RBP2(I)](Q1) ;RETURN ADDR FOR BP2 (LOCAL MSG)
	DMOVE T1,SAV1T1(I)
	DMOVE T3,SAV1T3(I)
	JRST 0(Q1)		;AND RETURN TO CALLING ROUTINE

BLTINS:	XBLT			;XBLT INSTRUCTION

SAV1T1:	0			;SNOOP
SAV1T2:	0			; BREAK
SAV1T3:	0			; POINTS
SAV1T4:	0			; SAVE
SAV1Q1:	0			; ACs
SAV1I:	0			; HERE
PNTR:	0
LTOD:	0
JOBNUM:	0
MONTYP:	0			;NON-ZERO IF WE HAVE EXTENDED ADDRESSING

ORGADR:	TABLE			;POINTER TO THE TABLE
EXMADR:	TABLE			;ADDRESS USER IS CURRENTLY TAKING FROM
DEPADR: TABLE			;ADDRESS MONITOR IS PUTTING INTO
TOPADR:	TABLE+TABLEN-1		;TOP OF THE BUFFER
LSTMSG:	BLOCK 1			;LOST MESSAGE COUNTER
PENMSG:	BLOCK 1			;NUMBER OF MESSAGES PENDING

INDEX:	0
TOTAL:	0
TABLE:	BLOCK TABLEN
OVRFLO:	0
FORKN:	0

LIT				;LITERALS IN PHASED CODE
BPRLEN==.-BPR

DEPHASE
RELOC

INSTAB:	LOCRH
INSTBL==.-INSTAB

PIPC1:	BLOCK	1		;STORAGE FOR PC INTERUPT CHANNEL 1
PIPC2:	BLOCK	1		;STORAGE FOR PC INTERUPT CHANNEL 2
PIPC3:	BLOCK	1		;STORAGE FOR PC INTERUPT CHANNEL 3
INTAC1:	BLOCK	1		;STORAGE FOR AC1 ON INTERUPT
SYMTAB:
	SYM RTRITR,BP1ADR,ROUTER ;POINT AT WHICH TO COLLECT INPUT MSGS
	SYM RTROTR,BP2ADR,ROUTER ;POINT AT WHICH TO COLLECT OUTPUT MSGS
	SYM RTRLTR,BP3ADR,ROUTER ;POINT AT WHICH TO COLLECT LOCAL MSGS
	MONRH
SYMTBL==.-SYMTAB

	END TIMER