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language-sources/ovrlay.mac
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TITLE OVRLAY - OVERLAY HANDLER FOR LINK
SUBTTL D.M.NIXON/DMN/JLd/JNG/MCHC/DZN/PY/PAH/HD/JBS/TARL 17-Mar-85
DEFINE CPYRGT <
ASCIZ /
COPYRIGHT (C) 1974, 1984 BY
DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
/ > ;[204]
;COPYRIGHT (C) 1974, 1984 BY
;DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
;ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
;INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
;COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
;OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
;TRANSFERRED.
;THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
;AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
;CORPORATION.
;DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
;SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
CUSTVR==0 ;CUSTOMER VERSION
DECVER==5 ;DEC VERSION
DECMVR==1 ;DEC MINOR VERSION
DECEVR==213 ;DEC EDIT VERSION
ENTRY .OVRLA,.OVRLU
INTERN %OVRLA
%OVRLA==<BYTE(3)CUSTVR(9)DECVER(6)DECMVR(18)DECEVR>
COMMENT \
THIS ROUTINE PRESERVES ALL ACCS EXCEPT 0 AND 1 WHICH IT DESTROYS FREELY.
\
SEARCH OVRPAR ;OVERLAY FILE DEFINITIONS
SALL
SUBTTL TABLE OF CONTENTS
; Table of Contents for OVRLAY
;
;
; Section Page
;
; 1 TABLE OF CONTENTS ........................................ 2
; 2 FEATURE TEST SWITCHES .................................... 3
; 3 REVISION HISTORY ......................................... 4
; 4 DEFINITIONS
; 4.1 Accumulators ...................................... 8
; 4.2 Macros
; 4.2.1 SEGMENT, SPUSH, SPOP, CALL ................. 9
; 4.2.2 Type-out ................................... 10
; 4.3 OPDEFs ............................................ 11
; 5 PRINCIPLE ENTRY POINT .................................... 12
; 6 RESTART PROCEDURE ........................................ 13
; 7 READ PREAMBLE ............................................ 16
; 8 CHECK PATH
; 8.1 Determine Links To Delete ......................... 17
; 8.2 Delete Old Links .................................. 19
; 8.3 'Other' Relocation And Symbols .................... 20
; 8.4 Move Symbols Down ................................. 21
; 8.5 Read In DDT Symbols ............................... 23
; 9 MOVE SYMBOL TABLE UP ..................................... 26
; 10 GIVE BACK LINK ........................................... 28
; 11 GIVE BACK SYMBOLS ........................................ 31
; 12 GET NEW LINK ............................................. 32
; 13 MULTIPLY-DEFINED ENTRY POINTS ............................ 35
; 14 RELOCATE LINK ............................................ 37
; 15 OTHER RELOCATION ......................................... 39
; 16 OVERLAY INITIALIZATION
; 16.1 OVINI - Zero Memory And Get Parameters ............ 41
; 17 FILE ROUTINES
; 17.1 TOPS-10
; 17.1.1 Overlay And Temp Files
; 17.1.1.1 Initialization ...................... 48
; 17.1.1.2 I/O ................................. 50
; 17.1.1.3 Argument Blocks ..................... 52
; 17.1.2 Error Messages ............................. 54
; 17.1.3 Log File
; 17.1.3.1 Initialization ...................... 56
; 17.1.3.2 I/O ................................. 57
; 17.1.3.3 Argument Blocks ..................... 60
; 17.2 TOPS-20
; 17.2.1 Overlay And Temp Files
; 17.2.1.1 Initialization ...................... 61
; 17.2.1.2 I/O ................................. 62
; 17.2.1.3 Argument Blocks ..................... 64
; 17.2.1.4 Error Messages ...................... 65
; 17.2.2 Log File
; 17.2.2.1 Initialization ...................... 67
; 17.2.2.2 I/O ................................. 68
; 17.2.2.3 Closing ............................. 69
; 18 MANUAL CALL SUBROUTINES
; 18.1 INIOV. - Initialize The Overlay File .............. 70
; 18.2 GETOV. - Get A Link And All Of Its Superiors ...... 71
; 18.3 REMOV. - Remove A Link And All Inferiors .......... 72
; 18.4 RUNOV. - Run An Overlay Link ...................... 73
; 18.5 SAVOV. - Mark A Link To Be Writable ............... 74
; 18.6 CLROV. - Mark A Link To Not Be Writable ........... 75
; 18.7 LOGOV. - Manipulate The Log File .................. 76
; 19 SUBROUTINES
; 19.1 GETNUM - Get Link Number From Name Or Number ...... 78
; 19.2 GETSPC - Convert String Into FILOP. Block ......... 81
; 19.3 GETSBX - Convert To SIXBIT, GETOCT - Convert To Octal 83
; 19.4 GETCUR - Get Link Information Of Caller ........... 84
; 19.5 INCORE, WRTPTR .................................... 85
; 19.6 GETJOB - Get Job Number For Temporary File Name ... 86
; 19.7 CHKDDT - Update Symbol Table Pointers On TOPS-20 .. 87
; 20 MESSAGE HANDLING
; 20.1 Miscellaneous Messages ............................ 88
; 20.2 FAIL, WARN, INFO .................................. 91
; 20.3 .OVRLU - Undefined Subroutine Entry ............... 92
; 20.4 PRNFSP - Print A File Specification ............... 93
; 20.5 PRNLNK, PRNSBX .................................... 97
; 20.6 PRNDEC, PRNOCT - Print Numbers .................... 98
; 20.7 PRNTXT, PRNFRS .................................... 99
; 20.8 PRNTIM - Print Runtime ............................ 100
; 21 ERROR MESSAGES (TEXT) .................................... 101
; 22 DATA AREAS ............................................... 102
; 23 THE END .................................................. 104
SUBTTL FEATURE TEST SWITCHES
COMMENT \ STANDARD DEC SETTING
TOPS20==0 ;-1 = TOPS-20 VERSION
FT2SEG==-1 ;-1 = TWO SEGMENT VERSION
FTRELOC==-1 ;-1 = RELOCATABLE OVERLAYS
FTMANUAL==-1 ;-1 = MANUAL OVERLAY CALLS
FTLOG==-1 ;-1 = LOG FILE CAPABILITY
FTSFD==5 ; = LENGTH OF SFDS ALLOWED
\
IFNDEF TOPS20,<TOPS20==0>
IFNDEF FT2SEG,<FT2SEG==-1>
IFNDEF FTRELOC,<FTRELOC==-1>
IFNDEF FTLOG,<FTLOG==-1>
IFNDEF FTMANUAL,<FTMANUAL==-1>
IFNDEF FTSFD,<FTSFD==5>
IFE TOPS20,<SEARCH MACTEN, UUOSYM> ;GET STANDARD DEFINITIONS
IFN TOPS20,<SEARCH MACSYM, MONSYM> ;GET STANDARD DEFINITIONS
SUBTTL REVISION HISTORY
;START OF VERSION 1
;1 INITIAL VERSION
;2 ADD FUNCTION CALLS TO RNT, IFS & CBC
;3 FIX VARIOUS BUGS IN MANUAL CALLS
;4 MAKE IT REENTRANT (TWO SEGMENT VERSION)
;5 REDUCE SIZE OF OVERHEAD TABLES
;6 SUPPORT DDT SYMBOLS
;START OF VERSION 1A
;7 JLd 17-Jan-75 SPR 10-14994
; Fix explicit calls to initialize the overlay list
; when necessary.
;10 CHANGE GETCUR TO USER PC OF PUSHJ RATHER THAN ADDRESS OF ARGBLOCK
; THIS IS FOR COBOL WHICH CONSTRUCTS ARG BLOCK IN LIBOL
;11 JLd 26-Mar-75 SPR 10-15706
; Make relocatable overlays work with all multiple calls:
; Unrelocate EXTTAB when the overlay is removed.
;12 JLd 27-Mar-75 SPR 10-15706
; Cause the symbol table to be kept even if core must
; be expanded.
;13 JNG 26-Jun-75 SPR 10-16380
; Move symbol table before getting core for an absolute link
; to avoid problems when trying to move up the symbols.
;14 JNG 27-Jun-75
; Fix bug introduced by edit 10. Clean up some code.
;15 JNG 29-Jun-75
; Edit 11 inserted an instruction into the range of a
; JUMPN T2,.-3 ... oops!!!
;16 JNG 2-Jul-75 SPR 10-15993
; Try harder to shrink when we have more core than we need.
;17 JNG 5-Aug-75 SPR 10-15734
; Reset ADDCOR and SIZCOR after calling MOVSYM,
; which destroys them.
;START OF VERSION 1B
;20 JNG 8-Oct-75
; If a manual call comes from the high segment, pretend it is
; from the ROOT so COBDDT will work properly.
;START OF VERSION 2 (TOPS-20 ONLY)
;21 DMN 13-Nov-75
; Make overlays work on TENEX
;START OF VERSION 2C -- FROM NOW ON, MAJOR & MINOR VERSIONS SAME AS LINK
;22 JNG 10-Feb-76
; Make OVRLAY's version correspond to LINK. Clean
; up the listing. Fix a minor bug in edit 21.
;23 JNG 10-Feb-76 SPR 18030
; Make sure we have CORE before reading in a relocatable overlay
; into other than its intended address and symbols are in core.
;24 JNG 10-Feb-76 SPR 18030
; Try harder to keep symbols in core when debugging, even if
; this means expanding core.
;25 JNG 22-Feb-76 SPR 18572
; Fix some minor bugs in non-TTY log file handling, and in the
; INIOVL manual call subroutine.
; Edits 26 and 27 were not used
;START OF VERSION 3A
;30 JNG 20-Jun-76
; Release on both TOPS-10 and TOPS-20 as OVRLAY version 3A(30)
;START OF VERSION 4
;31 JNG 27-Feb-77 SPR 10-21893
; Allow a call to INIOVL with no args to just read in the
; symbol table & do other initialization that is not normally
; done until the first overlay is read in.
;32 JNG 10-Apr-77
; Keep the symbol table up to date always if symbols are
; available due to load-time switches. Never look at the
; initial .JBSYM or .JBDDT to decide what to do.
;33 JNG 10-Apr-77 SPR 10-22407
; Make OVRLAY assemble with FTLOG=0.
;34 JNG 10-Apr-77 SPR 10-22436
; Make OVRLAY work with FTRELOC=0.
;35 JNG 10-Apr-77
; Set up reference lists correctly when link comes into core.
;36 JNG 10-Apr-77
; Save the PPN around the LOOKUP in OVRLAY.
;37 MCHC 20-SEP-77
; Don't output version change message if the change is from zero.
;START OF VERSION 4A
;40 DZN 15-Sep-78
; On TOPS-20, if DDT exists, set its internal symbol table pointer
; whenever we change .JBSYM.
;41 DZN 5-Oct-78
; Use new NAME% form of JSYS names to avoid conflicts with user-defined
; globals.
;42 DZN 5-Oct-78
; Change FTENEX conditional to TOPS20 to be consistent with the rest
; of LINK. Use proper mnemonics for JSYS arguments. Some code cleanup.
;43 DZN 13-Oct-78
; Fix link deletion problems. Make REMOV. take only a single argument,
; and delete that link and all of its inferiors (otherwise lost links
; result). Allow RUNOV. to delete the calling link as documented. Also
; remove OVLAOC message (use OVLARC instead).
;44 DZN 15-Oct-78
; Fix argument checking for calls to manual subroutines. This involves
; allowing all double and single precision argument types to work,
; making the OVLIAT message fatal and not type junk, and getting
; the correct user PC (see edit 10).
;45 DZN 15-Oct-78
; Fix PDL overflow if many calls to RUNOV. RUNOV. now unbinds back
; through the return PC on the stack, allowing replacement of links
; at the same level to succeed without the PDL overflow.
;46 JNG 15-Jun-79
; Use 7.01 GETTABs if available to find overlay file.
;47 DZN 25-Jul-79
; Clean up the listing for release.
;50 DZN 27-Aug-79
; Release on both TOPS-10 and TOPS-20 as version 4A(50).
;START OF VERSION 4B
;51 DZN 12-Nov-79 SPR 20-13384
; Fix forward reference to local label TIME, which subsequently drags
; in and defines the TIME JSYS.
;52-54 Superceded in Edit 5(100).
;55 PY 5-Jan-81
; Fix off-by-one bug when relocating overlays which have pointers to
; other nodes which are not relocated.
;56-100 Reserved for maintenance.
;START OF VERSION 5
;100 DZN 8-Feb-80
; Implement writable overlays for use by Fortran's SAVE statement.
; . On initialization, detect a potentially writable overlaid program and
; open nnnOVL.TMP.
; . Move overlay file definitions to OVRPAR.MAC for use by OVRLAY and
; LINK.
; Bugs fixes as a consequence of this edit:
; . File names, extensions, or SFD names longer than 6 characters in calls
; to INIOVL or LOGOVL could result in a badly parsed file specification
; or worse.
; . Closing the log file with CALL LOGOVL() never freed the buffer space
; because ROT was used as the FUNCT. function code rather than F.ROT.
; . [0,0] is not suppressed when a file specification is printed.
; . On TOPS-20, a CORE UUO is done even if UUO simulation is completely
; turned off.
;101 PAH 2-Feb-81
;
; Save and restore T0 over the I/O call just before RP1.
;
;102 PAH 2-Jun-82
;
; Set GJ%SHT in GTJFN call at TMPINI under TOPS-20 and
; put the source/destination designator in the right AC.
;103 PAH 3-Jun-82
;
; Correct typo in %OUTZ, change SIN% to SOUT%.
;
;104 HD 15-Jun-82
; Handle byte string descriptors that may be passed by
; FORTRAN 77 programs as file or link names on TOPS-20.
;
;105 HD 15-Jun-82
; Be sure to set writable bit when opening .LOG file.
;
;106 HD 22-Jun-82
; Futher work on edit 104.
;107 HD 2-JUL-82
; Make POSCKH save the ACs it uses. Some routines that call it exspect
; the ACs to be preserved
;200 HD 10-DEC-82
; Make calls to overlay handler work when passed double precision
; variables
;201 HD 16-DEC-82
; Set the number of buffers for .FILOP in LOGINI to the default number
; by changing .FONBF in the arg list at LFOWRT to -1.
;202 PAH 6-Jan-83
; Update copyright notices, clean up listing for release.
;203 PAH 11-Jan-83
; Embed ASCII copyright notice.
;204 PAH 20-Jan-83
; Shorten embedded copyright notice.
;205 HD 1-Feb-83
; Fix edit 201. It should ask for default number of output buffers only
; by putting -1,,0 in .FONBF at LFOWRT.
;206 JBS 25-Jul-83
; Make dummy edit for TOPS-10 OVRLAY - two lines were swapped in
; the released version at RLO7.
;207 TARL 28-Aug-83
; Fix problem with running virtual with overlays. OVRLAY could
; request a transfer that wouldn't fit in physical memory, and
; PFH can't split up FILOP. IOWDs. Make OVRLAY check for amount
; of memory allowed to use, and split up its request to fit
; in this size. This should also prove to be a slight performance
; win. TOPS-10 only.
;210 JBS 24-Oct-83
; Set FO.PRV in all FILOP. blocks so privileged users (JACCT and [1,2])
; can run overlaid programs when pathed into another PPN. TOPS-10 only.
;211 HD 21-Nov-83
; Check error return status for FUNCT. call at OVINI2 and make sure it
; doesn't loop if there is not enough memory available.
;212 PY 6-Sep-84
; Open the log file as 7 bit on TOPS-20.
;213 HD 17-Mar-85 SPR 10-35120
; Put data for LOGOVL at lable LFOWRT in the low segment.
SUBTTL DEFINITIONS -- Accumulators
;ACCUMULATORS
T0=0 ;[42] T0-T5 MUST BE 0-5 FOR JSYS ARGS
T1=1
T2=2
T3=3
T4=4
T5=5
P1=10
P2=11
L=16
P=17
SUBTTL DEFINITIONS -- Macros -- SEGMENT, SPUSH, SPOP, CALL
DEFINE SEGMENT (N)<
IFN FT2SEG,<
IFNDEF %SEG%,<
TWOSEG
RELOC 400000
RELOC 0
%SEG%==0
>
IFIDN <N><LOW>,<
IFN %SEG%,<
RELOC
%SEG%==0
>>
IFIDN <N><HIGH>,<
IFE %SEG%,<
RELOC
%SEG%==-1
>>>>
DEFINE SPUSH (AC) <
IRP AC,<
PUSH P,AC
>>
DEFINE SPOP (AC) <
IRP AC,<
POP P,AC
>>
;CALL MACRO FOR CALLING FUNCT. OR ANY OTHER DPSS CALLABLE ROUTINE. USAGE:
;
; CALL FUNCT.##,<<TYPE1,ARG1>,...,<TYPEn,ARGn>>
;
;EACH TYPEi SHOULD BE THE MNEMONIC FOR THE TYPE MINUS THE 'A.', SUCH AS SPI FOR
;SINGLE-PRECISION INTEGER.
DEFINE CALL(ROUT,ARGS)< ;;[100] DPSS CALLING SEQUENCE MACRO
..CNT==0 ;;[100] COUNT THE ARGS
IRP ARGS,<..CNT==..CNT+1> ;;[100] ..
MOVEI L,1+[ ;;[100] BUILD THE ARGUMENT BLOCK
-..CNT,,0 ;;[100] COUNT
IRP ARGS,<DOARG(ARGS)>] ;;[100] GENERATE EACH ARGUMENT POINTER
PUSHJ P,ROUT ;;[100] CALL THE ROUTINE
>
DEFINE DOARG(ARG)<DOARG1 ARG> ;[100] DUMMY MACRO TO GET RID OF <>
DEFINE DOARG1(TYPE,ARG)<Z A.'TYPE,ARG> ;[100] GENERATE THE ARGUMENT POINTER
SUBTTL DEFINITIONS -- Macros -- Type-out
DEFINE TYPE(TEXT)<
MOVEI T1,[ASCIZ \TEXT\] ;;[100] SET UP THE TEXT
PUSHJ P,PRNTXT ;;[100] GO PRINT IT
>
DEFINE TYPEC(CHAR)<
MOVEI T0,CHAR ;;[100] SET UP THE CHARACTER
PUSHJ P,@PRNCHR ;;[100] CALL THE PROPER OUTPUT ROUTINE
>
IFE TOPS20,<
OPDEF STOP [EXIT]
>
IFN TOPS20,<
DEFINE STOP<
HALTF% ;;[41]
JRST .-1 ;;[41] HALTF% IS CONTINUABLE
>
>
SUBTTL DEFINITIONS -- OPDEFs
;THE FOLLOWING OPDEFS CONTROL THE SELECTION OF THE TEMPORARY FILE WHEN WRITABLE
;OVERLAYS ARE USED. THE INPUT ROUTINES WILL READ FROM EITHER THE OVERLAY OR
;TEMPORARY FILE BASED ON THE SIGN OF THE UBLOCK FLAG. THESE OPDEFS SIMPLIFY THE
;SETTING AND TESTING OF THAT FLAG.
OPDEF SETTMP [HRROS UBLOCK] ;[100] USE TEMPORARY FILE IN I/O ROUTINES
OPDEF CLRTMP [HRRZS UBLOCK] ;[100] GO BACK TO OVERLAY FILE IN I/O ROUTINES
OPDEF SKIPT [SKIPL UBLOCK] ;[100] SKIP IF I/O FROM TEMPORARY FILE
OPDEF SKIPNT [SKIPGE UBLOCK] ;[100] SKIP IF I/O NOT FROM TEMPORARY FILE
OPDEF PJRST [JUMPA 17,] ;[100] SHOW PJRST'S CORRECTLY IN DDT
SUBTTL PRINCIPLE ENTRY POINT
;CALLS TO ROUTINES IN INFERIOR LINKS ARE CHANGED BY LINK TO:
;
; PUSHJ P,<EXTTAB BLOCK> ;NEED NOT ACTUALLY BE PUSHJ
;
;THE EXTTAB BLOCK FOR A ROUTINE THEN CONTAINS A JSP T1,.OVRLA THAT COMES HERE.
;IF THE LINK BEING CALLED IS ALREADY IN MEMORY AND THE ROUTINE HAS BEEN CALLED
;BEFORE, WE SIMPLY JUMP TO THE ROUTINE. OTHERWISE, THE CORRECT LINK AND ITS PATH
;ARE BROUGHT IN FIRST.
;
;ALL INTER-LINK CALLS EXECUTE THE CODE HERE, SO IT SHOULD BE AS FAST AS
;POSSIBLE. SELF-MODIFYING CODE IS USED FOR THIS.
SEGMENT LOW
CPYRGT
'.OVRLA'
.OVRLA:
;************* REPLACE
JRST SETINI ;INITIALIZE FIRST TIME
;************* BY
; MOVE T0,JT.FLG(T1) ;GET 1ST WORD OF ARG BLOCK
;************* AFTER FIRST TIME
JUMPGE T0,OVRL1 ;NOT KNOWN TO BE IN CORE
HRRZ T1,JT.ADR(T1) ;GET ADDRESS
JRST @(T1) ;GO TO IT
SEGMENT HIGH
SETINI: PUSH P,T1 ;[100] SAVE CALLER PC
PUSHJ P,OVINI ;[100] ZERO MEMORY AND SET UP OVERLAY FILE
POP P,T1 ;[100] RESTORE PC
PJRST .OVRLA ;[100] TRY AGAIN
SUBTTL RESTART PROCEDURE
RESTART:MOVE T1,FSTLNK ;[100] GET CONTROL SECTION OF LINK 0
SETZM CS.PTR(T1) ;CLEAR FORWARD PTR
MOVE T1,CS.EXT(T1) ;POINTER TO EXTTABS
MOVX T0,F.LIC ;[100] NO LINKS NOW IN MEMORY
ANDCAM T0,ET.FLG(T1) ;[100] ..
ADDI T1,ET.LEN-1
AOBJN T1,.-2 ;FOR ALL
MOVE T1,[JRST SETINI] ;REPLACE INITIALIZING INST
MOVEM T1,.OVRLA ;SO WE RE-INIT FILE
DMOVE T0,%JBREL ;ORIGINAL .JBREL & .JBSA
MOVEM T0,.JBREL## ;[42] RESET .JBREL FOR TOPS20
MOVEM T1,.JBSA## ;BACK AS IT WAS
IFN TOPS20,<
MOVX T1,.FHSLF ;[42] ONLY DO CORE UUO IF PAT IS AROUND
GCVEC% ;[41] SO WON'T DRAG IT IN IF NOT
MOVE T1,.JBSA## ;RESTORE AC 1 FOR DISPATCH
SKIPLE T2 ;[100] -1 OR 0 IF NO PA1050
> ;END IFN TOPS20
CORE T0, ;RESET OTHERWISE FREE CORE NOT AVAILABLE
JFCL
JRST (T1) ;GO TO START
;HERE IF THE LINK IS NOT KNOWN TO BE IN MEMORY. EVEN IF A ROUTINE IS IN A LINK
;THAT IS ALREADY IN MEMORY, WE DON'T KNOW IT UNTIL THE ROUTINE IS CALLED THE
;FIRST TIME. SO THERE ARE THREE STEPS:
;
; 1. RESOLVE MULTIPLY-DEFINED GLOBALS.
; 2. BRING IN THE REQUESTED LINK AND ITS PATH IF NECESSARY.
; 3. FINALLY MARK THE ROUTINE AS IN MEMORY SO SUBSEQUENT CALLS ARE FAST, AND
; JUMP TO THE ROUTINE.
OVRL1: PUSH P,T2 ;GET A SPARE ACC
TXNE T0,F.MDL ;[100] MULTIPLY DEFINED?
JRST MDL0 ;YES, SEE WHICH WE WANT
;SEE IF IT REALLY IS IN MEMORY.
INC0: HLRZ T0,JT.NUM(T1) ;GET NUMBER WE WANT
INC1: MOVE T2,FSTLNK ;GET START OF TREE
CAMN T0,CS.NUM(T2) ;MATCH?
JRST INC2 ;YES
HRRZ T2,CS.FPT(T2) ;GET FORWARD POINTER
JUMPN T2,.-3 ;TRY AGAIN
JRST NINC ;NOT IN CORE
;HERE WHEN THE LINK IS FINALLY IN MEMORY. MARK THIS ROUTINE AS NOW IN MEMORY,
;AND FIX REFERENCE POINTERS. ENTER WITH:
;
; T1/ ROUTINE'S EXTTAB ADDRESS + 1 (FROM JSP), SO USE JT.xxx SYMBOLS
INC2:
IFN FTRELOC,<
MOVE T0,CS.RLC(T2) ;GET OFFSET
ADDM T0,JT.ADR(T1) ;FIXUP INCORE ADDRESS
> ;END IFN FTRELOC
MOVX T2,F.LIC ;[100] MARK LINK IN MEMORY
IFN FTRELOC,<
SKIPE T0 ;NEED TO RELOCATE IT?
TXO T2,F.RLC ;[100] YES
> ;END IFN FTRELOC
IORB T2,JT.FLG(T1) ;SET FOR NEXT TIME
HRRZ T0,IT.REF(T2) ;GET POSSIBLE FORWARD REF
HRLI T0,IT.REF(T2) ;POINT TO INTTAB+1
ADDI T1,JT.REF ;POINT TO REFERENCE WORD IN EXTTAB
MOVEM T0,(T1) ;STORE IN EXTTAB
HRRM T1,IT.REF(T2) ;MAKE INTTAB POINT TO THIS EXTTAB
EXCH T2,T0 ;SO WE CAN INDEX
TRNE T2,-1 ;IF THERE WAS A FORWARD REF
HRLM T1,(T2) ;[35] CHANGE STORED BACK REF
;RESTORE AND EXIT.
INC3: POP P,T2 ;RESTORE ACC
HRRZ T1,T0 ;GET ADDRESS
JRST @(T1) ;GO TO IT
;HERE IF NOT IN CORE, READ IN PREAMBLE
NINC: PUSH P,T1 ;SAVE PC
MOVE T1,JT.NUM(T1) ;LINK # WE WANT
NINC1: HRRZM T1,CURLNK ;SAVE LINK CONTROL SECTION ADDRESS
HLRZ T0,T1 ;LINK #
PUSHJ P,CP0 ;CHECK PATH
POP P,T1 ;RESTORE PC
MOVE T0,JT.FLG(T1) ;GET FLAGS
TXNN T0,F.MDL ;[100] SPECIAL IF MULTIPLY DEFINED
JRST INC0 ;NO, TRY AGAIN
MINC: MOVE T1,T0 ;POINTER TO ACTUAL ENTRY IN MDL TABLE
IFN FTRELOC,<
HRRZ T2,MT.ADR(T1) ;GET UNRELOCATED ADDRESS
HLRZ T0,MT.NUM(T1) ;GET NUMBER
MOVE T1,FSTLNK ;START AT FRONT
CAME T0,CS.NUM(T1) ;THIS ONE?
JRST [HRRZ T1,CS.FPT(T1) ;GET NEXT (MUST BE THERE)
JRST .-1] ;TRY TEST AGAIN
MOVE T0,CS.RLC(T1) ;GET RELOCATION OFFSET
ADD T0,T2 ;PLUS ORIGINAL ADDRESS
> ;END IFN FTRELOC
IFE FTRELOC,<
MOVE T0,MT.ADR(T1) ;GET TRUE ADDRESS
> ;END IFE FTRELOC
JRST INC3 ;GO TO IT (BUT DON'T MARK INCORE)
SUBTTL READ PREAMBLE
;RP0 READS IN THE PREAMBLE FOR A SPECIFIED LINK. SINCE THE WINDOW INTO THE LINK
;NUMBER TABLE IS ONLY A DISK BLOCK BIG, WE MAY NEED TO MOVE THE WINDOW BEFORE
;FINDING THE LENGTH AND BLOCK NUMBER OF THE PREAMBLE. THE CALL IS:
;
; T0/ LINK NUMBER
;
;RETURNS WITH THE PREAMBLE IN PH.
RP0: MOVE T1,INCIDX ;GET INCORE LOWEST
CAIL T0,(T1) ;SEE IF IN CORE
CAILE T0,377(T1)
SKIPA T1,T0 ;NO
JUMPN T0,RP1 ;YES, BUT DON'T ALLOW 0
SKIPLE T0
CAMLE T0,HILINK ;CHECK UPPER RANGE
JRST E$$ILN ;[100] ILLEGAL LINK NUMBER
ANDCMI T1,377 ;WILL BE LOWEST BLOCK IN CORE
MOVEM T1,INCIDX ;EVENTUALLY
LSH T1,-8 ;INTO BLOCK NUMBER
ADD T1,DI+DI.LPT ;[100] PLUS BASE
PUSH P,T0 ;[101] SAVE INDEX NUMBER
PUSHJ P,%USETI ;SET ON IT
MOVE T0,[IOWD 200,IDXBFR]
PUSHJ P,%INZ ;READ IT IN
POP P,T0 ;[101] RESTORE INDEX
;HERE WHEN THE PROPER WINDOW INTO THE LINK NUMBER TABLE IS IN IDXBFR.
RP1: MOVE T1,T0 ;GET INDEX # AGAIN
ANDI T1,377 ;THIS BLOCK ONLY
ROT T1,-1 ;HALF
SKIPGE T1 ;EVEN HALF?
SKIPA T1,IDXBFR(T1) ;NO
HLRZ T1,IDXBFR(T1) ;YES
PUSHJ P,%USETU ;SET ON IT
PUSHJ P,%INB ;READ PREAMBLE BLOCK
MOVE T1,[INBFR,,PH] ;[100] COPY TO PREAMBLE BLOCK
BLT T1,PH+PH.LEN-1 ;[100] ..
POPJ P,
SUBTTL CHECK PATH -- Determine Links To Delete
;CP0 READS IN A SPECIFIED LINK AND THOSE LINKS ON ITS PATH. THIS IS DONE IN THE
;FOLLOWING STEPS:
;
; 1. DETERMINE THE FIRST DIFFERENCE BETWEEN THE PATH CURRENTLY IN MEMORY AND
; THE PATH REQUIRED FOR THE DESIRED LINK.
; 2. DELETE ALL LINKS FROM THE FIRST DIFFERENCE DOWN.
; 3. READ IN THE NEW LINKS REQUERED TO COMPLETE THE SPECIFIED PATH. RELOCATE
; EACH LINK AS NECESSARY.
; 4. PERFORM 'OTHER' RELOCATION (EFFECTS ON OTHER LINKS WHEN A LINK IS
; RELOCATED) ONCE ALL LINKS IN THE PATH ARE ALL IN.
; 5. READ IN THE SYMBOL TABLE IF NECESSARY, AND RELOCATE IT IF NECESSARY. ON
; TOPS-10, MOVE THE SYMBOL TABLE TOWARD LOWER ADDRESSES AS FAR AS POSSIBLE
; TO CONSERVE MEMORY.
CP0: SPUSH <P1,P2,L> ;[100] GET MORE ACS
PUSHJ P,RP0 ;[100] READ THE PREAMBLE
MOVE P1,FSTLNK ;GET BASE OF INCORE LINKS
HLRZ P2,PH+PH.FPT ;[100] POINTER TO LIST OF WHAT WE NEED
HRRZ T1,PH+PH.FPT ;[100] BLOCK # WE NEED
CAME T1,UBLOCK ;SAME AS CURRENT?
PUSHJ P,[PUSHJ P ,%USETU ;NO, SET ON IT
PJRST %INB] ;READ IT
CP1: HRRZ T0,CS.FPT(P1) ;GET NEXT LINK CONTROL SEC IN CORE (BYPASS 0)
JUMPE T0,CP3 ;FIRST TIME ONLY ROOT THERE
HRLZ P1,P1 ;SAVE LAST GOOD PTR
HRR P1,T0 ;RESET LINK PTR
MOVE T1,INBFR(P2) ;GET LINK # WE WANT
HRRZ T0,CS.NUM(P1) ;LINK# WE HAVE
JRST CP1B ;BYPASS TEST FOR ROOT
CP1A: HRRZ T0,CS.FPT(P1) ;GET NEXT CONTROL SEC.
JUMPE T0,CP3 ;RAN OUT
HRLZ P1,P1 ;SAVE LAST GOOD PTR
HRR P1,T0 ;RESET LINK PTR
HRRZ T0,CS.NUM(P1) ;LINK#
MOVS T1,INBFR(P2) ;GET NEXT PAIR
CAIE T0,(T1) ;MATCH?
JRST CP2 ;NO, FIRST DIFFERENCE
MOVS T1,T1 ;TEST FOR SECOND LINK#
HRRZ T0,CS.FPT(P1) ;GET NEXT CONTROL SEC.
JUMPE T0,CP3 ;ALL DONE
HRLZ P1,P1 ;SAVE LAST GOOD PTR
HRR P1,T0 ;RESET LINK PTR
HRRZ T0,CS.NUM(P1) ;LINK#
CP1B: CAIE T0,(T1) ;MATCH?
JRST CP2 ;NO
CAIGE P2,177 ;WILL REQUIRED PTR FIT IN 128 WORDS?
AOJA P2,CP1A ;YES, LOOP
AOS T1,UBLOCK ;GET NEXT BLOCK
PUSHJ P,%USETI ;SET ON IT
PUSHJ P,%INB ;READ IT IN
SETZ P2, ;START AT FRONT
JRST CP1A ;AND KEEP TRYING
SUBTTL CHECK PATH -- Delete Old Links
;HERE TO DELETE ALL NOW-UNNECESSARY LINKS.
CP2: PUSH P,P1 ;SAVE FIRST DIFF
HRRZ P1,P1 ;CLEAR PREV
PUSHJ P,DELPTH ;[43] DELETE ALL OLD LINKS
POP P,P1
HLRZ P1,P1 ;GET LAST GOOD ONE
;HERE TO READ IN THE REST OF THE DESIRED PATH. THIS IS DONE IN REVERSE ORDER
;SINCE WE ONLY HAVE ONE BUFFER. 'OTHER' RELOCATION MUST WAIT UNTIL ALL LINKS ARE
;IN MEMORY.
CP3: PUSHJ P,GTLNK ;GET IT
MOVE P1,THSLNK ;GET POINTER TO NEW LINK
HRRZ T1,PH+PH.BPT ;[100] GET ADDRESS OF BACK POINTER LIST
CAME T1,UBLOCK ;CURRENTLY IN CORE?
PUSHJ P,[PUSHJ P ,%USETU ;NO, SET ON IT
PJRST %INB] ;READ IT
HLRZ P2,PH+PH.BPT ;[100]
ANDI T1,177 ;OFFSET IN THIS BUFFER
MOVE T0,INBFR(P2) ;WHOM IT SHOULD BE LINKED TO
TRNE T0,-1 ;IF LAST HALF WORD IS NULL
TLZA T0,-1 ;NO, SO CLEAR LEFT
HLRZ T0,T0 ;YES, USE LEFT HALF
HLRZ T1,CS.BPT(P1) ;GET BACK LINK
HRRZ T1,CS.NUM(T1) ;WHOM IT IS LINKED TO
CAMN T1,T0 ;SAME?
JRST CP4 ;YES, RETURN
PUSHJ P,RP0 ;GET THIS PREAMBLE
HLRZ P1,CS.BPT(P1) ;RESET P1 TO POINT TO FATHER
JRST CP3 ;AND READ IN LINK
;ROUTINE TO DELETE A LINK. THIS IMPLIES DELETING ALL OF ITS INFERIORS (THE
;PATH) TOO. IF WE TRY TO DELETE THE CURRENT LINK (THE ONE THAT CALLED US),
;GIVE ?OVLARC.
;
;CALL:
; P1/ CONTROL BLOCK ADDR OF LINK TO START AT
;DESTROYS P1.
DELPTH: MOVEM P1,THSLNK ;[43] SET UP LINK FOR GBLNK
SKIPN OKOVLC ;[43] OK TO DELETE THE CALLER'S LINK
CAME P1,CURLNK ;[43] OR NOT THE CALLER'S LINK?
SKIPA ;[43] YES--DELETE THIS LINK
JRST E$$ARC ;[100] NO--ATTEMPT TO REMOVE CALLER
HRRZ P1,CS.FPT(P1) ;[43] ADVANCE TO NEXT WHILE WE CAN
PUSHJ P,GBLNK ;[43] GIVE BACK THE LINK
JUMPN P1,DELPTH ;[43] FREE MORE IF ANY
POPJ P, ;[43] ALL DONE
SUBTTL CHECK PATH -- 'Other' Relocation And Symbols
;HERE TO CHECK FOR AND PERFORM 'OTHER' RELOCATION IF NECESSARY.
CP4:
IFN FTRELOC,<
MOVE P1,FSTLNK ;START AT FRONT
CP4A: MOVE T1,CS.FLG(P1) ;GET FLAGS
TXZN T1,CF.RLO ;[100] OTHER RELOCATION STILL TO DO?
JRST CP4C ;NOT FOR THIS ONE
MOVEM T1,CS.FLG(P1) ;CLEAR FLAG
MOVE T1,FSTLNK ;HOWEVER SEE IF WORTH DOING
CP4B: HRRZ T1,CS.FPT(T1) ;GET NEXT
JUMPE T1,CP4C ;NOTHING ON PATH WAS RELOCATED
SKIPN CS.RLC(T1) ;IS THIS LINK RELOCATED?
JRST CP4B ;NO, TRY NEXT
PUSHJ P,RLO ;DO RELOCATION
CP4C: HRRZ P1,CS.FPT(P1) ;GET NEXT
JUMPN P1,CP4A ;AND CHECK IT
> ;END IFN FTRELOC
;HERE TO GET SYMBOLS RIGHT (FOR NOW, WILL FIX LATER).
CP5: SKIPN .JBSYM## ;[32] SYMBOLS SET UP AT OVINI4?
JRST CP6 ;NO
MOVE P1,FSTLNK ;GET START OF LIST
CP5A: SKIPN CS.SYM(P1) ;ALREADY SETUP?
PUSHJ P,GTSYM ;NO
MOVEI P2,(P1) ;REMEMBER LAST
HRRZ P1,CS.FPT(P1) ;GET NEXT
JUMPN P1,CP5A
IFE TOPS20,<
PUSHJ P,SYMDWN ;[100] MOVE SYMBOLS DOWN IF POSSIBLE
> ;END IFE TOPS20
CP6: SPOP <L,P2,P1> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
SUBTTL CHECK PATH -- Move Symbols Down
;HERE WITH ALL LINKS AND SYMBOLS IN MEMORY. MOVE SYMBOLS DOWN IF POSSIBLE SO
;MEMORY REDUCTION WILL WIN.
IFE TOPS20,<
SYMDWN: HLRZ P1,CS.SIZ(P2) ;[100] GET SIZE OF HIGHEST LINK
ADD P1,CS.ADR(P2) ;FIND WHAT SHOULD BE FIRST
;FREE WORD IN CORE.
MOVEI P1,200(P1) ;LEAVE SOME ROOM FOR LATER
SYMDW1: HRRZ P2,.JBSYM## ;[100] GET CURRENT SYMBOL LOC
CAMG P2,P1 ;ARE THEY UP TOO HIGH?
JRST SYMDW3 ;[100] NO, FORGET IT (SNH)
MOVEM P1,ADDCOR ;ADDRESS THAT WE WANT
SUB P2,P1 ;MAX SIZE OF BLOCK WE WANT
HLRO P1,.JBSYM## ;GET - S.T. SIZE
ADD P2,P1 ;FIND SPACE BETWEEN BLOCKS
SKIPL P2 ;DO THE BLOCKS OVERLAP?
SETZ P2, ;NO, NO ADJUSTMENT NEEDED
MOVN P1,P1 ;LENGTH THAT WE WANT
ADD P1,P2 ;ADJUST FOR ANY OVERLAP
MOVEM P1,SIZCOR ;STORE FOR FUNCT.
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPN STATUS ;MAKE IT?
JRST SYMDW2 ;[100] YES, GO MOVE SYMBOLS
MOVE P1,ADDCOR ;ADDR OF CORE WE CAN'T GET
ADD P1,PAGSIZ ;POINT TO SOME WE CAN
JRST SYMDW1 ;[100] AND GO TRY AGAIN
;STILL IN IFE TOPS20
;HERE TO COPY THE SYMBOL TABLE DOWN AND DELETE THE OLD COPY.
SYMDW2: HLRO P2,.JBSYM## ;[100] GET SYMBOL TABLE SIZE
MOVN P2,P2 ;...
ADD P2,ADDCOR ;POINT TO END OF NEW S.T.
HRLZ P1,.JBSYM## ;SOURCE IS OLD S.T.
HRR P1,ADDCOR ;DEST IS NEW S.T.
BLT P1,-1(P2) ;COPY DOWN S.T.
HRRZ T0,.JBSYM## ;ADDR OF OLD S.T.
SUB T0,ADDCOR ;FIND HOW FAR THEY MOVED
MOVN T0,T0 ;FIX SIGN FOR ADJSYM
HRRZ P1,.JBSYM## ;GET ADDR OF S.T. TO FREE
CAMGE P1,P2 ;UNLESS THEY OVERLAP
MOVE P1,P2 ;THEY DO ... ADJUST POINTER
MOVEM P1,ADDCOR ;POINT TO CORE TO FREE
PUSHJ P,ADJSYM ;ADJUST ALL S.T. PNTRS
SKIPE STATUS ;[100] MAKE SURE ALL IS OK
JRST E$$CSM ;[100] MADE IT
SYMDW3: CALL FUNCT.##,<<SPI,[F.CBC]>,<AS,OVLNAM>,<SPI,STATUS>>
POPJ P, ;[100] DONE
E$$CSM: PUSHJ P,FAIL ;[100] THIS SHOULDN'T HAPPEN
TYPE <CSM Cannot shrink memory> ;[100]
PUSHJ P,PRNFSP ;[100] SAY FUNCT. COULDN'T DO IT
PUSHJ P,CRLF ;[100] END THE LINE
STOP ;SO DIE QUIETLY
> ;END IFE TOPS20
SUBTTL CHECK PATH -- Read In DDT Symbols
GTSYM: SKIPN T1,CS.DDT(P1) ;GET DSK SYMBOL PTR
POPJ P, ;NONE, GIVE UP
PUSHJ P,%USETI ;SET ON IT
HLRE T1,T1 ;LENGTH
HRRZ T0,.JBSYM## ;TOP OF WHAT WE HAVE
ADD T0,T1 ;BOTTOM
MOVEM T0,ADDCOR
MOVMM T1,SIZCOR ;SETUP ARGS
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;DID WE WIN
JRST GTSYM1 ;NO
MOVE T0,ADDCOR ;WHERE TO READ INTO
HLL T0,CS.DDT(P1) ;DDT SYMBOL PTR
MOVEM T0,CS.SYM(P1) ;INDIVIDUAL LINK SYMBOL PTR
SUBI T0,1 ;ONE LESS FOR IOWD
PUSHJ P,%INZ ;READ IT IN
MOVN T1,SIZCOR ;GET LENGTH
HRLI T1,-1(T1) ;IN BOTH HALVES, COMPENSATE FOR CARRY
ADDM T1,.JBSYM## ;ADJUST SYM PTR
IFN TOPS20,<
PUSHJ P,CHKDDT ;[40] STORE S.T. PTR IN DDT IF IT'S THERE
> ;END IFN TOPS20
IFN FTRELOC,<
SKIPE CS.RLC(P1) ;[100] WAS LINK RELOCATED
PUSHJ P,RLS1 ;[100] YES--RELOCATE THE SYMBOLS
> ;END IFN FTRELOC
POPJ P, ;NO, RETURN
;RLS1 RELOCATES VALUES IN THE SYMBOL TABLE AS A RESULT OF A LINK BEING
;RELOCATED. USES ACS AS FOLLOWS:
;
; T0/ TO HOLD TEMP HALF WORD
; T1/ BYTE WORD (18 BYTES)
; T2/ TO HOLD BYTE COUNT IN LSH WORD (T1)
; T3/ OFFSET
; T4/ AOBJN WORD FOR BYTE WORDS (IN INBFR)
; T5/ - NO. OF WORDS FOR WHOLE LINK
IFN FTRELOC,<
RLS1: SPUSH <T3,T4,T5> ;MORE ACCS
MOVE T0,CS.NUM(P1) ;GET LINK#
PUSHJ P,RP0 ;READ PREAMBLE AGAIN
MOVE T3,CS.RLC(P1) ;GET OFFSET
SKIPN T1,PH+PH.RDR ;[100] BLOCK WE NEED
JRST [MOVEM P1,THSLNK ;[100] MAKE OVLMAN PRINT RIGHT LINK
JRST E$$NRS] ;[100] NO RELOCATION TABLE FOR SYMBOLS
HLRE T5,T1 ;-NO. OF WORDS IN LINK
HRRZ T2,CS.SYM(P1) ;FIRST WORD
HRLI T2,-^D18 ;AOBJN WORD
PUSHJ P,RLCRD1 ;FIRST TIME
PUSHJ P,RLCRW ;GET FIRST WORD
RLS2: JUMPGE T1,RLS4 ;NO RELOCATION FOR LHS
HLRZ T0,(T2) ;GET 1/2 WORD
ADD T0,T3 ;RELOCATE
HRLM T0,(T2) ;PUT BACK
RLS4: LSH T1,1 ;RIGHT HALF BIT
JUMPGE T1,RLS5 ;NO RELOCATION
HRRZ T0,(T2) ;GET 1/2 WORD
ADD T0,T3 ;RELOCATE
HRRM T0,(T2) ;PUT BACK
RLS5: LSH T1,1
JUMPN T1,RLS6 ;MORE TO DO FOR THIS BYTE WORD?
AOBJN T2,. ;USE UP ALL WORDS
CAIA ; IN THIS 18
RLS6: AOBJN T2,RLS2 ;LOOP FOR ALL OF LINK
RLS3: AOJGE T5,RLS7 ;[100] RAN OUT OF WORDS
PUSHJ P,RLCRW ;GET NEXT RELOC WORD
JUMPE T1,[ADDI T2,^D18 ;NONE FOR THIS WORD
JRST RLS3] ;IGNORE 0 WORDS
HRLI T2,-^D18 ;RESET COUNT
JRST RLS2 ;GET NEXT DATUM
RLS7: SPOP <T5,T4,T3> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
> ;END OF IFN FTRELOC
GTSYM1: PUSHJ P,MOVSYM ;TRY TO MOVE SYMBOL TABLE UP
SKIPN STATUS ;DID WE WIN?
JRST GTSYM ;YES, TRY AGAIN
E$$NMS: PUSHJ P,WARN ;[100] PRINT %OVL PREFIX
POPJ P, ;[100] NO WARNINGS REQUESTED
TYPE <NMS Not enough memory to load symbols> ;[100]
PUSHJ P,PRNFRS ;[100] SAY WHY FUNCT. FAILED
PJRST CRLF
SUBTTL MOVE SYMBOL TABLE UP
MOVSYM: HRRZ T0,.JBSYM## ;GET BASE OF SYMBOL TABLE
HLRE T1,.JBSYM## ;LENGTH
SUB T0,T1 ;NEXT FREE (WE HOPE)?
HRRZ T1,PAGSIZ ;MINIMUM TO EXPAND BY
DMOVEM T0,ADDCOR ;STORE ARGS
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPN T1,STATUS ;WELL?
JRST MOVSY3 ;GOT IT, NOW MOVE UP SYMBOLS
CAIE T1,2 ;OTHER ALLOCATED BLOCKS IN THE WAY?
POPJ P, ;NO, GIVE UP
HLRE T1,.JBSYM## ;NOW MUST FIND PIECE AS LONG AS ST
MOVNM T1,SIZCOR ;SO SET UP FOR NEXT FUNCT. CALL
MOVSY1: HRRZ T1,PAGSIZ ;SEE IF CORE A PAGE HIGHER IS FREE
ADDM T1,ADDCOR ;SO CAN PUT THE SYMBOL TABLE THERE
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPN T1,STATUS ;MAKE IT?
JRST MOVSY2 ;YES, NOW BLT SYMBOLS
CAIN T1,2 ;OTHER BLOCKS STILL IN THE WAY?
JRST MOVSY1 ;YES, TRY HIGHER YET
POPJ P, ;NO, GIVE UP ON SYMBOLS
MOVSY2: HRLZ T0,.JBSYM## ;OLD LOC OF SYMBOLS
HRR T0,ADDCOR ;AND NEW LOC
HRRZ T1,T0 ;CALC WHERE THEY WILL END
ADD T1,SIZCOR ;..
BLT T0,-1(T1) ;AND MOVE THE SYMBOLS
HRRZ T0,.JBSYM## ;GET ADDRESS TO RETURN
EXCH T0,ADDCOR ;STORE IT; GET NEW ADDRESS
SUB T0,ADDCOR ;FIND THEIR DIFFERENCE FOR ADJSYM
JRST ADJSYM ;GO FIXUP ALL OTHER SYM POINTERS
;MOVE SYMBOL TABLE UP BY REVERSE BLT LOOP
MOVSY3: HRRZ T0,.JBSYM## ;BOTTOM OF SYMBOLS
HLRE T1,.JBSYM## ;-LENGTH
MOVM T1,T1
HRL T1,T1 ;+LENGTH ,, +LENGTH
ADD T1,T0 ;+LENGTH ,, TOP + 1
SUBI T1,1 ;,,TOP
TLO T1,(1B0) ;SIGN BIT ON
MOVEM T0,ADDCOR ;ADDRESS WE WILL GIVE BACK
IFN FT2SEG,<
PUSHJ P,PAGSIZ ;MUST BE IN LOW SEG
> ;END IFN FT2SEG
SEGMENT LOW
PAGSIZ: POP T1,.-.(T1) ;*** MODIFIED ***
JUMPL T1,.-1 ;LOOP FOR ALL SYMBOLS
IFN FT2SEG,<
POPJ P, ;RETURN
> ;END IFN FT2SEG
SEGMENT HIGH
HRRZ T0,PAGSIZ ;ADJUST SYMBOL PTR BY HOW MUCH THEY MOVED
ADJSYM: ADDM T0,.JBSYM##
IFN TOPS20,<
PUSHJ P,CHKDDT ;[40] STORE S.T. PTR IN DDT IF IT'S THERE
> ;END IFN TOPS20
MOVE T1,FSTLNK ;MUST DO SAME FOR ALL LINKS IN CORE
SKIPE CS.SYM(T1) ;MY NOT BE ANY
ADDM T0,CS.SYM(T1) ;ADJUST
HRRZ T1,CS.FPT(T1) ;GET NEXT
JUMPN T1,.-3 ;FOR ALL
CALL FUNCT.##,<<SPI,[F.RAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
POPJ P, ;RETURN
SUBTTL GIVE BACK LINK
GBLNK: PUSH P,P1 ;[100] SAVE AN AC FOR ADDRESS OF CONTROL SECTION
MOVE P1,THSLNK ;[100] ..
SKIPE .JBSYM## ;[32] KEEPING SYMBOLS UP TO DATE?
PUSHJ P,GBSYM ;YES, RETURN SYMBOL SPACE
;CLEAR BI-DIRECTIONAL REFERENCE IN EXTTAB
MOVX T0,F.LIC ;[100] TO CLEAR IN-MEMORY FLAG
MOVE T1,CS.EXT(P1) ;[100] GET AOBJN POINTER TO TRANS TABLES
JUMPGE T1,GBLNK1 ;IGNORE IF NONE
GBLNK0: HLRZ T2,ET.NUM(T1) ;GET LINK #
JUMPE T2,GBLNKU ;MUST BE UNDEFINED IF IN ROOT
MOVE T2,ET.REF(T1) ;GET OTHER REF POINTER
TRNE T2,-1
HLLM T2,(T2) ;BACK LINK IN FORWARD OVERLAY
MOVS T2,T2
TRNE T2,-1 ;SKIP IF NO FORWARD LINK
HLRM T2,(T2) ;FORWARD LINK IN BACK OVERLAY
ANDCAM T0,ET.FLG(T1) ;CLEAR FLAG FOR COMPLETNESS
GBLNKU: ADDI T1,ET.LEN-1 ;5 WORD BLOCKS
AOBJN T1,GBLNK0 ;LOOP FOR ALL OF TABLES
;NOW TO CLEAR ALL DIRECT REFERENCES.
GBLNK1: PUSH P,T3 ;[100] SAVE UNTIL END OF LOOP
MOVN T3,CS.RLC(P1) ;[100] GET RELOC OFFSET
MOVE T1,CS.INT(P1) ;[100] AOBJN PTR TO INT TRANS TABLE
JUMPGE T1,GBLNK5 ;NONE
GBLNK2: HRRZ T2,IT.REF(T1) ;GET FORWARD REF
JUMPE T2,GBLNK4 ;END OF CHAIN
GBLNK3: HRL T2,(T2) ;GET ITS REF
GBLNK6: SETZM (T2) ;CLEAR THIS
ANDCAM T0,ET.ADR-ET.REF(T2) ;AND ITS INCORE FLAG
ADDM T3,ET.ADR-ET.REF(T2) ;REMOVE RELOCATION
HLRZ T2,T2 ;GET NEXT
JUMPN T2,GBLNK6 ;LOOP IF EXISTS
GBLNK4: ADDI T1,IT.LEN-1 ;TWO WORD TABLES
AOBJN T1,GBLNK2 ;LOOP
;NOW TO CLEAR FORWARD AND BACKWARD LINKS.
GBLNK5: POP P,T3 ;[100] RESTORE AFTER LOOP
MOVE T1,CS.PTR(P1) ;[100] GET POINTERS
TRNE T1,-1 ;SKIP IF NO FORWARD ONE
HLLM T1,CS.BPT(T1) ;STORE BACK PTR IN FORWARD LINK
MOVS T1,T1
TRNE T1,-1 ;SKIP IF NO BACK PTR
HLRM T1,CS.FPT(T1) ;STORE FORWARD PTR IN BACK LINK
MOVE T1,CS.OSY(P1) ;[100] RESTORE SYMBOL TABLE POINTER
MOVEM T1,CS.SYM(P1) ;[100] ..
;HERE TO DELETE THE LINK, WRITING IT OUT FIRST IF NECESSARY.
MOVE T1,DI+DI.FLG ;[100] WRITABLE OVERLAYS?
TXNN T1,OD.WRT ;[100] ..
JRST GBLNK7 ;[100] NO--DON'T BOTHER TESTING THE LINK
MOVE T0,CS.NUM(P1) ;[100] YES--IS THIS LINK WRITABLE?
PUSHJ P,WRTPTR ;[100] ..
LDB T1,T0 ;[100] ..
TXNN T1,OW.WRT ;[100] ..
JRST GBLNK7 ;[100] NO--JUST DELETE THE LINK
TXO T1,OW.PAG ;[100] YES--MARK IT PAGED
DPB T1,T0 ;[100] ..
IFN FTRELOC,<
; Unrelocate the link here if necessary.
> ;END IFN FTRELOC
; ..
; ..
IFN FTLOG,<
PUSHJ P,E$$WLN ;[100] TELL USER WHAT'S GOING ON
> ;END OF IFN FTLOG
HLLZ T0,CS.OVL(P1) ;[100] FIND WHERE AND HOW MUCH TO WRITE
HRR T0,CS.COR(P1) ;[100] ..
SUBI T0,1 ;[100] ..
HRRZ T1,CS.OVL(P1) ;[100] ..
PUSHJ P,%USETO ;[100] WRITE OUT THE LINK
PUSHJ P,%OUTZ ;[100] ..
;FINALLY, FREE THE MEMORY ASSIGNED TO THE LINK.
GBLNK7:
IFN FTLOG,<
PUSHJ P,E$$DLN ;[100] TELL USER THE LINK'S GOING
> ;END OF IFN FTLOG
MOVE T1,THSLNK ;GET CONTROL SECTION OF THIS LINK
MOVE T1,CS.COR(T1) ;GET CORE SIZE AND ORIGIN
HRRZM T1,ADDCOR ;ORIGIN
HLRZM T1,SIZCOR ;LENGTH
CALL FUNCT.##,<<SPI,[F.RAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;[100] IF THE MEMORY COULDN'T BE FREED
JRST E$$CDL ;[100] THEN TELL THE USER AND DIE
POP P,P1 ;[100] RESTORE THE AC
POPJ P, ;[100] DONE
SUBTTL GIVE BACK SYMBOLS
GBSYM: MOVE T1,THSLNK ;GET START OF CONTROL SECTION
MOVE T0,CS.SYM(T1) ;GET SYMBOL TABLE PTR
JUMPE T0,CPOPJ ;NONE
HRRZM T0,ADDCOR ;GIVE BACK AT THIS ADDRESS
HLRE T0,T0
MOVM T0,T0
MOVEM T0,SIZCOR ;THIS MUCH
HRL T0,T0
ADDM T0,.JBSYM## ;REDUCE SYMBOL TABLE
IFN TOPS20,<
PUSHJ P,CHKDDT ;[40] STORE S.T. PTR IN DDT IF IT'S THERE
> ;END IFN TOPS20
CALL FUNCT.##,<<SPI,[F.RAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;MAKE SURE OK
JRST E$$CDL ;[100] NO
POPJ P, ;YES, RETURN
SUBTTL GET NEW LINK
GTLNK: SKIPN T1,.JBSYM## ;SYMBOLS MAY BE IN THE WAY
JRST GTLNK4 ;NO SUCH LUCK
MOVE T0,PH+PH.ADD ;[100] SEE IF THEY ARE IN THE WAY
ADD T0,PH+PH.LLN ;[100] ..
CAIGE T0,(T1) ;ARE THEY?
JRST GTLNK4 ;NO, GO LOAD THE LINK
PUSHJ P,MOVSYM ;YES, TRY TO MOVE THEM
SKIPN STATUS ;DID WE
JRST GTLNK ;YES, TRY AGAIN
JRST GTLNK0 ;NO - MUST RELOCATE LINK
GTLNK4: DMOVE T0,PH+PH.ADD ;[100] WHERE WE WANT LINK TO GO & LENGTH OF IT
DMOVEM T0,ADDCOR ;STORE FOR FUNCT. CALL
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPN STATUS ;CHECK FOR FAILURE
JRST GTLNK2 ;GOT WHAT WE NEED
; ..
; ..
;HERE IF WE COULDN'T GET THE MEMORY FOR THE LINK WHERE WE WANTED TO. TRY TO GET
;THE MEMORY WHEREEVER WE CAN. IF THAT FAILS, DELETE THE SYMBOL TABLE (IF ANY)
;AND TRY ONE LAST TIME.
GTLNK0:
IFN FTRELOC,<
MOVE T1,DI+DI.FLG ;[100] SEE IF RELOCATABLE OVERLAYS
TXNN T1,OD.RLC ;[100] ..
> ;END IFN FTRELOC
JRST [MOVEI T1,PH+PH.NUM-CS.NUM ;[100] NO--DON'T BOTHER WITH TRICKS
MOVEM T1,THSLNK ;[100] FAKE UP POINTER FOR LINK NAME
JRST E$$MAN] ;[100] MEMORY FOR ABSOLUTE LINK NOT AV.
IFN FTRELOC,<
DMOVE T0,PH+PH.ADD ;[100] GET ADDR AND SIZE OF LINK
DMOVEM T0,ADDCOR ;STORE FOR FUNCT. CALL
CALL FUNCT.##,<<SPI,[F.COR]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;CHECK FOR FAILURE
JRST E$$CGM ;[100] FAILED
HRRZ T1,.JBSYM## ;IF LOADING SYMBOLS
JUMPE T1,GTLNK2 ;[100] NO
CAMLE T1,ADDCOR ;SEE IF ABOVE SYMBOLS
JRST GTLNK2 ;[100] NO, ALL IS WELL
;GIVE BACK SPACE, MOVE SYMBOLS AND TRY AGAIN
CALL FUNCT.##,<<SPI,[F.RAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SPUSH <ADDCOR,SIZCOR> ;PRESERVE THESE ACROSS MOVSYM
PUSHJ P,MOVSYM ;MOVE SYMBOLS
SPOP <SIZCOR,ADDCOR> ;RESTORE FROM MOVSYM
SKIPN STATUS ;DID THAT WIN?
JRST GTLNK ;YES, TRY WHOLE CYCLE AGAIN
CALL FUNCT.##,<<SPI,[F.COR]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;STILL THERE?
JRST E$$CGM ;[100] NO???????????? BUG IN OTS
> ;END IFN FTRELOC
; ..
; ..
GTLNK2: HRRZ T0,PH+PH.NUM ;[100] GET LINK NUMBER WE'RE READING
PUSHJ P,WRTPTR ;[100] GET WRITABLE LINK FLAGS
LDB T1,T0 ;[100] ..
TXNE T1,OW.PAG ;[100] IS THIS LINK IN TEMPORARY FILE?
SETTMP ;[100] YES--TELL INPUT ROUTINES
MOVE T1,PH+PH.OVL ;[100] BLOCK# LINK STARTS AT
PUSHJ P,%USETI ;SET ON IT
MOVN T1,PH+PH.LLN ;[100] -LENGTH
HRLZ T0,T1 ;LEFT HALF OF IOWD
HRR T1,ADDCOR ;START OF BLOCK
HRRI T0,-1(T1) ;-LENGTH,,ADDRESS-1
PUSHJ P,%INZ ;READ IT
CLRTMP ;[100] DONE WITH TEMPORARY FILE
;*** NOW CHECK RELOCATION ***
IFN FTRELOC,<
MOVE T0,ADDCOR ;ADDRESS WE GOT
SUB T0,PH+PH.ADD ;[100] ADDRESS WE WANTED
MOVE T1,PH+PH.CST ;[100] WHERE CONTROL SECT SHOULD BE
ADD T1,T0 ;WHERE IT IS
MOVEM T1,THSLNK ;POINT TO IT
PUSHJ P,RLC0 ;SEE IF RELOCATION REQUIRED
> ;END IFN FTRELOC
IFE FTRELOC,<
MOVE T1,PH+PH.CST ;[100] LINK IS ALWAYS WHERE EXPECTED
MOVEM T1,THSLNK ;[34] POINT THSLNK TO IT
> ;END IFE FTRELOC
IFN FTLOG,<
PUSHJ P,E$$RLN ;[100] NOTIFY LOG FILE OF LINK
IFN FTRELOC,<
MOVE T1,THSLNK
SKIPE CS.RLC(T1) ;DID IT NEED RELOCATION?
PUSHJ P,E$$RLL ;[100] YES--SAY SO
> ;END IFN FTRELOC
> ;END OF IFN FTLOG
MOVE T1,THSLNK ;ADDRESS OF LINK WE JUST READ IN
MOVE T0,CS.SYM(T1) ;[100] SAVE ORIGINAL SYMBOL TABLE PTR
MOVEM T0,CS.OSY(T1) ;[100] ..
MOVE T0,CS.FPT(P1) ;GET FORWARD POINTER
HRLZM P1,CS.BPT(T1) ;LINK TOWARDS ROOT
HRRM T0,CS.FPT(T1) ;POSSIBLE FORWARD LINK
HRRM T1,CS.FPT(P1) ;PUTIN NEW FORWARD LINK
EXCH T1,T0 ;SO WE CAN INDEX TO FORWARD PTR
TRNE T1,-1 ;BUT NOT IF 0
HRLM T0,CS.BPT(T1) ;LINK FORWARD LINK TO THIS ONE
POPJ P,
SUBTTL MULTIPLY-DEFINED ENTRY POINTS
;HERE TO RESOLVE A CALL TO A MULTIPLY-DEFINED ROUTINE. WE HAVE SEVERAL POSSIBLE
;CHOICES, SO ARBITRARILY CHOOSE THE ONE THAT MINIMIZES DISK I/O. ATTEMPT TO
;CHOOSE THE CLOSEST ONE TO THE ROOT IF SEVERAL ARE ALREADY IN MEMORY. OTHERWISE,
;READ ALL THE PREAMBLES AND PICK THE ONE WITH THE LARGEST PATH IN MEMORY, AND
;IF POSSIBLE ONE THAT DOES NOT OVERLAY EXISTING LINKS.
MDL0: PUSH P,T3 ;ACC FOR AOBJN WORD
MOVE T3,JT.MDL(T1) ;GET AOBJN PTR TO MDL TABLE
ADDI T3,1 ;BYPASS NAME
MDL1: HLRZ T0,MT.NUM(T3) ;GET LINK# WE WANT
MOVE T2,FSTLNK ;START OF INCORE LIST
CAMN T0,CS.NUM(T2) ;MATCH?
JRST MDLIC ;YES
HRRZ T2,CS.FPT(T2) ;GET NEXT
JUMPN T2,.-3 ;TRY AGAIN
ADDI T3,1 ;WORDS ARE PAIRS
AOBJN T3,MDL1 ;TRY NEXT POSSIBLE ENTRY
PUSH P,T1 ;SAVE PTR
MOVE T3,JT.MDL(T1) ;GET AOBJN PTR BACK
ADDI T3,1 ;BYPASS NAME
SPUSH <T4,T5> ;USED AS COUNTERS
SETZB T4,T5 ;INITIALIZE
MDL3: HLRZ T0,MT.NUM(T3) ;GET POSSIBLE LINK
PUSHJ P,RP0 ;READ PREAMBLE IN
HRRZ T1,PH+PH.FPT ;[100] BLOCK# WE NEED
CAME T1,UBLOCK ;SAME AS CURRENT?
PUSHJ P,[PUSHJ P,%USETU ;NO SET ON IT
PJRST P,%INB] ;AND READ IT IN
HLRZ T1,PH+PH.FPT ;[100] REL WORD IN BLOCK
ADDI T1,INBFR ;FIX IN CORE
HRLI T1,(POINT 18,0,17) ;BYPASS FIRST BYTE SINCE ITS 0
MOVE T2,FSTLNK ;GET START
JFFO T3,MDL5 ;BYPASS ROOT AND CLEAR T4 ON THE FLY
MDL4: ILDB T0,T1 ;GET NEXT ONE WE WANT
CAME T0,CS.NUM(T2) ;MATCH?
JRST MDL6 ;NO, END OF THIS TRY
ADDI T4,1 ;ONE MORE MATCH
MDL5: HRRZ T2,CS.FPT(T2) ;GET NEXT
JUMPN T2,MDL4 ;AS LONG AS THERE IS ONE
MDL6: CAIG T4,(T5) ;LONGEST PATH YET?
JRST .+3 ;NO
HRRZ T5,T4 ;LENGTH
HRL T5,T3 ;PTR TO IT
ADDI T3,1 ;WORDS ARE IN PAIRS
AOBJN T3,MDL3 ;MORE TO TRY?
HLRZ T3,T5 ;NO PICK LONGEST
SPOP <T5,T4>
; ..
; ..
JUMPN T3,E$$ARL ;[100] HOWEVER IF NONE WERE ANY GOOD
MOVE T1,0(P) ; RESTORE ORIGINAL PTR
MOVE T3,JT.MDL(T1) ; AND USE FIRST!
ADDI T3,1 ;BYPASS NAME
E$$ARL: PUSHJ P,WARN ;[100] PRINT %OVL PREFIX
JRST MDL2 ;NOT WANTED, RESTORE T1
TYPE <ARL Ambiguous request in>
HRRZ T1,MT.CST(T3) ;GET CONTROL SEC ADDRESS
MOVEM T1,THSLNK ;FOR ERROR MESSAGE
PUSHJ P,PRNLNK ;LINK #
TYPE < for > ;[100]
MOVE T1,0(P) ;GET EXTTAB PTR
MOVE T1,JT.MDL(T1) ;GET MULTIPLE-DEFINED PTR
MOVE T1,0(T1) ;GET NAME
PUSHJ P,PRNSBX
TYPE <, using link number > ;[100]
HLRZ T0,MT.NUM(T3) ;GET ONE WE PICKED OUT
PUSHJ P,PRNDEC
PUSHJ P,CRLF
MDL2: POP P,T1
HRRM T3,JT.ADR(T1) ;STORE POINTER INCASE RELOCATED
EXCH T1,0(P) ;GET OLD T3, PUT T1 ON STACK
MOVE T3,MT.CST(T3) ;GET LINK #
EXCH T1,T3 ;PUT IN T1, RESTORE T3
JRST NINC1 ;NOT INCORE
MDLIC: HRRZ T0,T3 ;POINTER TO INTTAB
POP P,T3 ;RESTORE ACC
JRST MINC ;AND SEE IF RELOCATED
SUBTTL RELOCATE LINK
IFN FTRELOC,<
COMMENT \
USES AC T0 - T5 AS FOLLOWS
T0 TO HOLD TEMP HALF WORD
T1 BYTE WORD (18 BYTES)
T2 TO HOLD BYTE COUNT IN LSH WORD (T1)
T3 OFFSET
T4 AOBJN WORD FOR BYTE WORDS (IN INBFR)
T5 - NO. OF WORDS FOR WHOLE LINK
\
RLC0: SKIPE T0 ;NONE FOR THIS LINK
PUSHJ P,RLC1 ;RELOCATE THIS LINK
MOVX T0,CF.RLO ;[100] GET READY TO MARK LINK RELOCATED
MOVE T1,THSLNK ;GET POINTER
SKIPE PH+PH.ORL ;[100] ANY OTHER RELOCATION?
IORM T0,CS.FLG(T1) ;YES, DO IT LATER
POPJ P,
RLC1: SPUSH <T3,T4,T5> ;MORE ACCS
MOVE T3,T0 ;SAFER PLACE
MOVE T1,PH+PH.CST ;[100] WHERE CS SHOULD HAVE BEEN
ADD T1,T3 ;WHERE IT IS
MOVEM T3,CS.RLC(T1) ;STORE DIFF
SKIPN T1,PH+PH.REL ;[100] BLOCK WE NEED
JRST E$$MAN ;[100] NOT RELOCATABLE
HLRE T5,T1 ;-NO. OF WORDS IN LINK
HRRZ T2,ADDCOR ;FIRST WORD
HRLI T2,-^D18 ;AOBJN WORD
PUSHJ P,RLCRD1 ;FIRST TIME
PUSHJ P,RLCRW ;GET FIRST WORD
RLC2: JUMPGE T1,RLC4 ;NO RELOCATION FOR LHS
HLRZ T0,(T2) ;GET 1/2 WORD
ADD T0,T3 ;RELOCATE
HRLM T0,(T2) ;PUT BACK
RLC4: LSH T1,1 ;RIGHT HALF BIT
JUMPGE T1,RLC5 ;NO RELOCATION
HRRZ T0,(T2) ;GET 1/2 WORD
ADD T0,T3 ;RELOCATE
HRRM T0,(T2) ;PUT BACK
RLC5: LSH T1,1
JUMPN T1,RLC6 ;MORE TO DO FOR THIS BYTE WORD?
AOBJN T2,. ;USE UP ALL WORDS
CAIA ; IN THIS 18
RLC6: AOBJN T2,RLC2 ;LOOP FOR ALL OF LINK
RLC3: AOJGE T5,RLCZ ;RAN OUT OF WORDS
PUSHJ P,RLCRW ;GET NEXT RELOC WORD
JUMPE T1,[ADDI T2,^D18 ;NONE FOR THIS WORD
JRST RLC3] ;IGNORE 0 WORDS
HRLI T2,-^D18 ;RESET COUNT
JRST RLC2 ;GET NEXT DATUM
RLCZ: SPOP <T5,T4,T3> ;RESTORE ACCS
POPJ P, ;RETURN
RLCRW0: JUMPE T5,RLCZ ;SEE IF ALL DONE
PUSHJ P,RLCRD ;NO, FILL BUFFER
RLCRW: AOBJP T4,RLCRW0 ;JUMP IF BUFFER IS EMPTY
MOVE T1,(T4) ;GET NEXT WORD
POPJ P,
RLCRD: AOS T1,UBLOCK ;READ NEXT BLOCK
RLCRD1: PUSHJ P,%USETU ;SET ON IT
PUSHJ P,%INB ;READ IT IN
MOVE T4,[-201,,INBFR-1] ;ACCOUNT FOR INITIAL AOBJX
POPJ P,
SUBTTL OTHER RELOCATION
COMMENT \
USES AC T0 - T5 AS FOLLOWS
T0 TEMP 1/2 WORD
T1 WORD TO RELOC
T2 RELOC BYTES
T3 OFFSET
T4 AOBJN COUNTER FOR NO. OF WORDS IN BUFFER
T5 -NO. OF WORDS IN THIS LINK,, -NO. OF WORDS IN PH.ORL
\
RLO: MOVE T0,CS.NUM(P1) ;GET LINK#
PUSHJ P,RP0 ;READ IN PREAMBLE AGAIN
SPUSH <T3,T4,T5> ;NEED ACCS AGAIN
MOVE T1,PH+PH.ORL ;[100] GET POINTER
HLRZ T5,T1 ;-NO. OF WORDS IN PH.ORL
PUSHJ P,RLCRD1 ;SETUP FIRST TIME
RLO1: JUMPE T5,RLCZ ;ALL DONE
PUSHJ P,RLCRW ;READ A WORD
JUMPE T1,RLCZ ;ALL DONE
MOVN T1,T1 ;NO. OF WORDS
HRL T5,T1 ;FORM AOBJN COUNTER
PUSHJ P,RLCRW ;GET LINK#,,ADDRESS
HLRZ T2,T1 ;LINK#
HRRZ T3,T1 ;ADDRESS WE WOULD LIKE IT AT
MOVE T1,FSTLNK ;START OF CHAIN
RLO2: CAMN T2,CS.NUM(T1) ;ONE WE WANT?
JRST RLO3 ;YES
HRRZ T1,CS.FPT(T1) ;GET NEXT
JUMPN T1,RLO2 ;TRY IT
E$$LNM: PUSHJ P,FAIL ;[100] NOT IN CORE!
TYPE <LNM Link number >
MOVE T0,T2 ;NUMBER WE WANTED
PUSHJ P,PRNDEC ;BUT FAILED TO FIND
TYPE < not in memory> ;[100]
PUSHJ P,CRLF ;[100] END THE LINE
STOP
RLO3: HRRZ T1,CS.ADR(T1) ;WHERE IT REALLY IS
SUBM T1,T3 ;DIFFERENCE
JUMPE T3,RLO8 ;OK, ITS THERE
RLO4: AOBJP T5,RLO1 ;GET NEXT LINK
PUSHJ P,RLCRW ;GET A RELOC WORD
HLLZ T2,T1 ;RELOC BITS
HRRZ T1,T1 ;ADDRESS
ADD T1,CS.RLC(P1) ;PUT IN RIGHT PLACE
RLO5: JUMPGE T2,RLO6 ;NO RELOC FOR LHS
HLRZ T0,(T1) ;GET 1/2 WORD
ADD T0,T3 ;ADDRESS IT SHOULD BE AT
HRLM T0,(T1)
RLO6: LSH T2,1 ;GET RHS RELOC
JUMPGE T2,RLO7 ;NONE
HRRZ T0,(T1)
HRRM T0,(T1) ;[206]
ADD T0,T3 ;[206]
RLO7: LSH T2,1
JUMPE T2,RLO4 ;GET NEXT
AOJA T1,RLO5
RLO8: HLRE T1,T5 ;NO. OF WORDS LEFT IN THIS AREA
MOVM T1,T1
;[55] Insert 1 Line after RLO8+1 Line PY 5-Jan-81
SOS T1 ;[55] DECREMENT T1 TO CORRECT FOR RLCRD
HRL T1,T1
ADD T5,T1 ;BYPASS THEM
RLO9: ADD T4,T1 ;AND IN BUFFER
JUMPL T4,RLO1 ;TRY NEXT AREA
HLRZ T2,T4 ;STORE EXCESS
PUSHJ P,RLCRD ;GET NEXT BLOCK
MOVE T1,T2
;[55] Insert 1 Line after RLO9+4 Lines PY 5-Jan-81
AOS T1 ;[55] DO PART OF FAKED AOBJN
HRL T1,T1 ;AOBJN TO ADD TO BUFFER PTR
JRST RLO9
> ;END OF IFN FTRELOC
SUBTTL OVERLAY INITIALIZATION -- OVINI - Zero Memory And Get Parameters
OVINI: SPUSH <T2,T3,L> ;[100] SAVE ACS FOR INITIALIZATION
MOVE T0,[I.ZZ,,I.ZZ+1]
SETZB T1,I.ZZ
BLT T0,I.END ;ZERO DATA
MOVEI T0,1000 ;[100] GET MONITOR'S PAGE SIZE
HRRM T0,PAGSIZ ;ONLY USED IF SYMBOLS LOADED
IFE TOPS20,<
PUSHJ P,GETJOB ;[100] GET JOB NUMBER FOR TEMP FILE NAME
> ;END IFE TOPS20
IFN FTLOG,<
CALL FUNCT.##,<<SPI,[F.RNT]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ITIME>>
> ;END IFN FTLOG
; ..
; ..
;HERE TO GET THE OVERLAY FILE SPECIFICATION IF WE'RE RUNNING ON TOPS-10. IF THE
;USER CALLED INIOVL, WE'VE ALREADY DONE THIS. OTHERWISE, LOOK FOR THE OVERLAY
;FILE IN THE SAME PLACE THE .EXE FILE CAME FROM. THIS IS DONE WITH 7.01 GETTAB'S
;IF THEY EXIST, OR THE FUNCT. F.IFS FUNCTION IF THEY DON'T.
IFE TOPS20,<
SKIPE OVLSPC ;[100] ALREADY HAVE A FILE SPEC?
JRST OVINI1 ;[100] YES--DON'T NEED TO FIND ONE
MOVX T1,'OVL ' ;[100] NO--START WITH .OVL
MOVEM T1,OFOLKP+.RBEXT ;[100] ..
;NOW TRY TO GET WHERE WE CAME FROM (INCLUDING SFD'S) VIA GETTAB.
;IF UNAVAILABLE (OLD MONITOR), USE INFO FROM FUNCT.
MOVSI T1,-<.PTMAX-.PTSFD-1> ;[46] NUMBER OF SFD'S
HRROI T0,.GTRS0 ;[46] GETTAB FOR RUN FROM SFD, THIS JOB
SFDLUP: PUSH P,T0 ;[46] SAVE OVER GETTAB
GETTAB T0, ;[46] GET IT
JRST NOSFD ;[46] GETTAB FAILED, SEE WHY
MOVEM T0,OFOPTH+.PTSFD(T1) ;[100] STORE THIS SFD
POP P,T0 ;[46] RESTORE
ADDI T0,1 ;[46] INCREMENT GETTAB ARG
AOBJN T1,SFDLUP ;[46] LOOP FOR ALL SFD'S
JRST GETUFD ;[46] GOT ALL SFDS, NOW FOR UFD
;HERE WHEN A GETTAB TO GET AN SFD FAILED. SEE IF THE MONITOR IS TOO OLD.
NOSFD: POP P,T0 ;[46] KEEP STACK IN PHASE
TRNE T1,-1 ;[46] FAIL FIRST TIME?
JRST GETUFD ;[46] NO, GOT SOME SFDS, USE NEW DATA
JRST NOT701 ;[46] GO USE FUNCT.
;HERE IF THE 7.01 GETTABS WORK. FILL IN THE REST OF THE DATA.
GETUFD: SETZM OFOPTH+.PTSFD(T1) ;[100] FORCE A ZERO AFTER THE LAST SFD
HRROI T1,.GTRDI ;[46] UFD OF PATH WE WERE RUN FROM
GETTAB T1, ;[46] GET IT
JRST NOT701 ;[46] CAN'T
SKIPN T1 ;[46] THERE?
JRST NOT701 ;[46] NO, GIVE UP
MOVEM T1,OFOPTH+.PTPPN ;[100] STORE UFD TO FINISH PATH BLOCK
HRROI T1,.GTRDV ;[46] GET DEVICE WE WERE RUN FROM
GETTAB T1, ;[46] . . .
JRST NOT701 ;[46] NOT THERE FORGET IT
SKIPN T1 ;[46] AVAILABLE?
JRST NOT701 ;[46] NOPE, DON'T USE THIS INFO
MOVEM T1,OFORED+.FODEV ;[100] YES, STORE DEVICE
HRROI T1,.GTRFN ;[46] THE FILE NAME WE CAME FROM
GETTAB T1, ;[46] GET IT
JRST NOT701 ;[46] CAN'T, LEAVE WELL ENOUGH ALONE
SKIPN T1 ;[46] RETURN ANYTHING?
JRST NOT701 ;[46] NO, IGNORE IT
MOVEM T1,OFOLKP+.RBNAM ;[100] OK, STORE IT
MOVEI T1,OFOPTH ;[100] POINT LOOKUP BLOCK TO PATH BLOCK
MOVEM T1,OFOLKP+.RBPPN ;[100] STORE IN .RBPPN
JRST OVINI1 ;[46] DONE, PROCEED
;HERE IF THE GETTABS DON'T WORK. USE FUNCT. TO ASK THE OTS THE
;CONTENTS OF THE ACS AT STARTUP.
NOT701: CALL FUNCT.##,<<SPI,[F.IFS]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,OFORED+.FODEV>,
<SPI,OFOLKP+.RBNAM>,<SPI,OFOLKP+.RBPPN>>
> ;END IFE TOPS20
; ..
; ..
;HERE TO SET UP THE OVERLAY FILE SPECIFICATION IF WE'RE RUNNING ON TOPS-20.
;AGAIN, IF THE USER CALLED INIOVL, WE'RE DONE. OTHERWISE, LOOK FOR THE OVERLAY
;FILE IN THE SAME PLACE AS THE .EXE FILE WE'RE MAPPED FROM. THIS NON-OBVIOUS
;RESTRICTION IS REQUIRED BECAUSE THERE IS NO OTHER WAY TO FIND THE .EXE FILE. A
;SIDE EFFECT IS THAT BREAKPOINTS CANNOT BE SET IN THE OVERLAY HANDLER IN THE
;PAGE THAT IS CHECKED, UNTIL WE GET PAST THE RPACS% JSYS.
IFN TOPS20,<
SKIPE STRPTR ;STRING SETUP?
JRST OVINI1 ;YES
MOVEI T1,OVRL1+1000 ;[42] SEE IF A PURE PAGE IN THE
LSH T1,-9 ;[42] MIDDLE OF OVRLAY IS
HRLI T1,.FHSLF ;[42] SHARABLE
RPACS% ;[41] READ ACCESSABILITY
ERJMP E$$RPA ;[100] RPACS% JSYS FAILED
TXNE T2,PA%PRV ;[42] PRIVATE?
JRST E$$OPP ;[100] OVERLAY HANDLER IN PRIVATE PAGE
RMAP% ;[41] JFN FROM WHENCE WE CAME
ERJMP E$$RMP ;[100] RMAP% JSYS FAILED
HLRZ T2,T1 ;[42] JFN
HRROI T1,INBFR ;[42] WHERE TO STORE IT
MOVEM T1,STRPTR ;[42] FOR GTJFN%
MOVX T3,<<FLD .JSAOF,JS%DEV>!<FLD .JSAOF,JS%DIR>!
<FLD .JSAOF,JS%NAM>!JS%PAF> ;[42] DEV:<DIR>NAME
JFNS% ;[41]
> ;END IFN TOPS20
; ..
; ..
OVINI1: MOVX T1,<MOVE T0,JT.FLG(T1)> ;[42]
MOVEM T1,.OVRLA ;REPLACE INST
MOVE T1,.JBSA## ;GET START ADDRESS
MOVE T0,.JBREL## ;AND INITIAL CORE SIZE
DMOVEM T0,%JBREL ;STORE
MOVEI T1,RESTART ;SO WE CAN RE-INIT THE OVERLAY FILE
HRRM T1,.JBSA## ;AFTER ^C START
PUSHJ P,OVLINI ;[100] INITIALIZE THE OVERLAY FILE
DMOVE T0,[EXP <IOWD DI.LEN,DI>,1] ;[100] READ IN THE DIRECTORY BLOCK
PUSHJ P,%USETI ;[100] ..
PUSHJ P,%INZ ;[100] ..
HLRE T1,DI+DI.LPT ;[100] GET NUMBER OF LINKS
MOVMM T1,HILINK ;STORE FOR RANGE CHECK
MOVE T1,.JBVER## ;GET VERSION NUMBER
CAME T1,DI+DI.VER ;[100] SEE IF SAME
PUSHJ P,E$$IVN ;[100] WARN USER
MOVE T1,DI+DI.LPT ;[100] GET BLOCK # OF NUMBERS
PUSHJ P,%USETI
MOVE T0,[IOWD 200,IDXBFR]
PUSHJ P,%INZ
SKIPN T1,DI+DI.WPT ;[100] WRITABLE LINK TABLE TO READ?
JRST OVINI6 ;[100] NO--DON'T BOTHER
HLLZ T0,T1 ;[100] YES--READ IT ALL IN
HRRI T0,OW-1 ;[100] ..
PUSHJ P,%USETI ;[100] ..
PUSHJ P,%INZ ;[100] ..
MOVE T1,DI+DI.FLG ;[100] DOES THIS PROGRAM CONTAIN WRITABLE
TXNE T1,OD.WRT ;[100] OVERLAY LINKS?
PUSHJ P,TMPINI ;[100] YES--INITIALIZE THE TEMP FILE
OVINI6: SETZ T0, ;[100] READ IN PREAMBLE FOR LINK 0 (ROOT)
PUSHJ P,RP1 ;[100] ..
MOVE T1,PH+PH.CST ;[100] CONTROL SECTION FOR LINK 0
MOVEM T1,FSTLNK
; ..
; ..
;TRY TO ALLOCATE MEMORY WHERE THE FIRST LINKS PAST THE ROOT WILL COME IN. IF
;THIS FAILS, TRY GETTING MEMORY AT ADDRESSES IN 1000 WORD INCREMENTS UNTIL WE
;SUCCEED. COBOL USES THE -1 SET IN SIZCOR TO MARK THE END OF THE OTS AREA
;SPECIFIED BY /SPACE IN LINK.
MOVE T0,PH+PH.NFL ;[100] NEXT FREE LOC
MOVEM T0,ADDCOR ;STORE FOR FUNCT. CALL
OVINI2: SETOM SIZCOR ;-1 MEANS GET WHATS FREE
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
;**;[211] Change code at OVINI2+2 HD 21-Nov-83
SKIPN T1,STATUS ;[211] DID WE SUCCEED
JRST OVINI3 ;YES
CAIN T1,1 ;[211] NO - CHECK FOR NO MEMORY AVAIL
JRST E$$CGM ;[211] IF NO MEMORY AVAILABLE - ISSUE
;ERROR MESSAGE AND DIE
OVINI5: MOVEI T0,1000 ;[211] ELSE HAVE TO GO RELOCATABLE
ADDB T0,ADDCOR ;[211] LEAVE SOME SPACE
CAILE T0,777777 ;[211] HAVE WE GONE TOO FAR?
JRST E$$CGM ;[211] YES SO DIE
JRST OVINI2 ;[211] NO - TRY AGAIN
OVINI3: CALL FUNCT.##,<<SPI,[F.RAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
MOVE T1,ADDCOR ;[100] DID WE GET IT WHERE WE WANTED TO?
CAME T1,PH+PH.NFL ;[100] ..
PUSHJ P,E$$STS ;[100] NO--OTS RESERVED SPACE TOO SMALL
; ..
; ..
;NOW FOR DDT SYMBOLS FOR ROOT
SETZM .JBSYM## ;[32] ASSUME NOT KEEPING SYMBOLS IN CORE
IFN TOPS20,<
PUSHJ P,CHKDDT ;[40] STORE S.T. PTR IN DDT IF IT'S THERE
> ;END IFN TOPS20
SKIPN T1,PH+PH.RDX ;[100] GET POINTER
JRST OVXIT ;[100] NOT WANTED, OR AVAILABLE
PUSHJ P,%USETI ;SET ON BLOCK
HLRE T1,T1 ;-LENGTH
MOVMM T1,SIZCOR ;WHAT WE NEED
ADD T1,.JBREL## ;FROM TOP OF CORE
ADDI T1,1 ;SYMBOL TABLE POINTS BEYOND TOP
CAML T1,ADDCOR ;LESS THAN END OF ROOT?
JRST OVINI4 ;NO, USE THE ADDRESS
MOVE T0,T1 ;YES, SAVE ADDR WANTED
SUB T1,ADDCOR ;GET THE OVERLAP
MOVN T1,T1 ; OF SYMBOLS OVER ROOT
ADDI T1,1777 ;ROUND UP, TO THE NEAREST
ANDI T1,776000 ; 1K BOUNDRY.
ADD T1,T0 ;ADD TO FIRST TRY
OVINI4: MOVEM T1,ADDCOR ;SET START OF SYMBOLS ADDR
CALL FUNCT.##,<<SPI,[F.GAD]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;DID WE GET IT?
JRST [PUSHJ P,E$$NMS ;[100] NO MEMORY FOR SYMBOLS
JRST OVXIT] ;[100] DON'T BOTHER
MOVE T0,ADDCOR ;GET ADDRESS
HLL T0,PH+PH.RDX ;[100] -LENGTH
MOVE T1,PH+PH.CST ;[100] ADDRESS OF HEADER
MOVEM T0,CS.SYM(T1) ;SET SYMBOL PTR
MOVEM T0,.JBSYM## ;AND FOR DDT
IFN TOPS20,<
PUSHJ P,CHKDDT ;[40] STORE S.T. PTR IN DDT IF IT'S THERE
> ;END IFN TOPS20
SUBI T0,1 ;IOWD IS 1 LESS
PUSHJ P,%INZ ;READ IT IN
OVXIT: SPOP <L,T3,T2> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
POPL: POP P,L ;[100] FOR NOW
POPJ P,
SUBTTL FILE ROUTINES -- TOPS-10 -- Overlay And Temp Files -- Initialization
IFE TOPS20,<
OVLINI: MOVX T1,FO.PRV+FO.ASC ;[210] GET EXTENDED CHANNEL WITH PRIVS
HLLM T1,OFORED+.FOFNC ;[100] ..
MOVE T1,[.FOLEB+1,,OFORED] ;[100] LOOK UP THE OVERLAY FILE
MOVE T0,OFOLKP+.RBPPN ;[100] SAVE PPN WORD FROM MAD MONITOR
FILOP. T1, ;[100]
JRST [MOVEM T0,OFOLKP+.RBPPN ;[100] RESTORE PPN FOR CORRECT ERR MSG
HRLI T1,OFORED ;[100] TELL ERROR ROUTINE WHICH SPEC
JRST E$$CFF] ;[100] CANNOT FIND FILE
MOVEM T0,OFOLKP+.RBPPN ;[100] RESTORE PPN FOR CORRECT MSGS
LDB T1,[POINTR (OFORED+.FOFNC,FO.CHN)] ;[100] GET ASSIGNED CHANNEL
DPB T1,[POINTR (OFOUSI,FO.CHN)] ;[100] STORE WHERE NEEDED
DPB T1,[POINTR (OFOINP,FO.CHN)] ;[100] ..
POPJ P, ;[100] DONE
;STILL IN IFE TOPS20
;HERE TO INITIALIZE THE OVERLAY TEMPORARY FILE ON TOPS-10 IF WRITABLE OVERLAYS
;ARE REQUIRED. WE MUST OPEN A NEW FILE CALLED nnnOVL.TMP IN THE USER'S DEFAULT
;PATH. SINCE THE .FOSAU FUNCTION OF FILOP. WILL USE AN EXISTING FILE, IF ANY, WE
;MUST CREATE THE FILE WITH THE .FOWRT FUNCTION FIRST, THEN USE .FOSAU.
TMPINI: MOVX T1,FO.PRV+FO.ASC+.FOWRT ;[210] ASK FOR CHAN, SUPERSEDE, PRIVS
MOVEM T1,TFOWRT+.FOFNC ;[100] ..
MOVE T1,JOBNUM ;[100] BUILD nnnOVL FILE NAME
HLLM T1,TFOENT+.RBNAM ;[100] ..
HLLZS TFOENT+.RBEXT ;[100] FIX ANY DATE-75 BUGS
MOVE T1,[.FOLEB+1,,TFOWRT] ;[100] PREPARE TO CREATE THE FILE
MOVE T0,TFOENT+.RBPPN ;[100] SAVE PPN WORD FROM MAD MONITOR
FILOP. T1, ;[100] CREATE THE FILE
JRST [MOVEM T0,TFOENT+.RBPPN ;[100] RESTORE PPN WORD FOR ERR MSG
HRLI T1,TFOWRT ;[100] TELL ERROR ROUTINE WHICH SPEC
JRST E$$CWF] ;[100] CANNOT WRITE FILE
MOVEM T0,TFOENT+.RBPPN ;[100] RESTORE PPN WORD
LDB T1,[POINTR (TFOWRT+.FOFNC,FO.CHN)] ;[100] GET ASSIGNED CHANNEL
DPB T1,[POINTR (TFOREL+.FOFNC,FO.CHN)] ;[100] STORE WHERE WE NEED IT
MOVX T1,FO.PRV ;[210] WANT TO USE PRIVS
IORM T1,TFOREL+.FOFNC ;[210] PUT INTO BLOCK
MOVE T1,[.FOFNC+1,,TFOREL] ;[100] CLOSE TEMP FILE TO CREATE IT
FILOP. T1, ;[100] ..
JRST [HRLI T1,TFOWRT ;[100] SELECT PROPER FILE SPEC
JRST E$$CCF] ;[100] CANNOT CLOSE FILE
MOVX T1,FO.PRV+FO.ASC+.FOSAU ;[210] FIX FILOP. BLOCK FOR UPDATE
MOVEM T1,TFOWRT+.FOFNC ;[100] MODE
HLLZS TFOENT+.RBEXT ;[100] FIX ANY DATE-75 BUGS
MOVE T1,[.FOLEB+1,,TFOWRT] ;[100] OPEN FILE IN UPDATE MODE
MOVE T0,TFOENT+.RBPPN ;[100] SAVE PPN WORD FROM MAD MONITOR
FILOP. T1, ;[100] OPEN THE TEMP FILE
JRST [MOVEM T0,TFOENT+.RBPPN ;[100] RESTORE PPN WORD FOR ERR MSG
HRLI T1,TFOWRT ;[100] TELL ERROR ROUTINE WHICH SPEC
JRST E$$CUF] ;[100] CANNOT UPDATE FILE
MOVEM T0,TFOENT+.RBPPN ;[100] RESTORE PPN WORD
LDB T1,[POINTR (TFOWRT+.FOFNC,FO.CHN)] ;[100] GET ASSIGNED CHANNEL
DPB T1,[POINTR (TFOUSI,FO.CHN)] ;[100] STORE WHERE NEEDED
DPB T1,[POINTR (TFOINP,FO.CHN)] ;[100] ..
DPB T1,[POINTR (TFOUSO,FO.CHN)] ;[100] ..
DPB T1,[POINTR (TFOOUT,FO.CHN)] ;[100] ..
POPJ P, ;[100] DONE
SUBTTL FILE ROUTINES -- TOPS-10 -- Overlay And Temp Files -- I/O
;STILL IN IFE TOPS20
;%USETU POSITIONS THE OVERLAY OR TEMPORARY FILE ON A SPECIFIED BLOCK NUMBER, AND
;REMEMBERS THAT BLOCK NUMBER IN UBLOCK. %USETI DOES THE SAME THING, BUT DOES NOT
;REMEMBER THE BLOCK NUMBER. THE CALL IS:
;
; T1/ <ANYTHING>,,<BLOCK NUMBER>
;
;ALL ACS ARE SAVED.
%USETU: HRRM T1,UBLOCK ;[100] REMEMBER BLOCK # INBFR WILL HAVE
%USETI: PUSH P,T1 ;[100] SAVE T1 OVER FILOP.
HRRZM T1,FILBLK+.FOIOS ;[100] POSITION FILE ON PROPER BLOCK
MOVE T1,OFOUSI ;[100] ASSUME OVERLAY FILE
SKIPNT ;[100] IS IT THE TEMPORARY FILE INSTEAD?
MOVE T1,TFOUSI ;[100] YES--USE THAT FILE
TXO T1,FO.PRV ;[210] ASK FOR PRIVS IF WE'VE GOT THEM
MOVEM T1,FILBLK+.FOFNC ;[100] ..
MOVE T1,[.FOIOS+1,,FILBLK] ;[100] ..
FILOP. T1, ;[100] ..
JRST [HRLI T1,OFORED ;[100] ASSUME WE USED OVERLAY FILE
SKIPNT ;[100] DID WE?
HRLI T1,TFOWRT ;[100] NO--IT WAS THE TEMPORARY FILE
JRST E$$IPE] ;[100] INPUT POSITIONING ERROR
POP P,T1 ;[100] RESTORE T1
POPJ P, ;[100] DONE
;[207] THE TWO ROUTINES HERE READ DATA FROM THE OVERLAY OR TEMPORARY
;[207] FILE, PRESERVING ALL ACCUMULATORS. %INB SETS UP A COMPLETE
;[207] COMMAND LIST ASSUMING 200 WORDS AT INBFR, %INZ ASSUMES THAT THE
;[207] COMMAND WORD IS ALREADY IN T0 AND NEEDS ONLY THE ENDING 0 IN
;[207] T1.
%INB: MOVE T0,[IOWD 200,INBFR] ;[100] SET UP DEFAULT COMMAND LIST
%INZ: PUSH P,T2 ;[207] SAVE AN AC FOR FILOP.
MOVE T2,OFOINP ;[100] ASSUME OVERLAY FILE
SKIPNT ;[100] IS IT?
MOVE T2,TFOINP ;[100] NO--USE TEMPORARY FILE FOR READ
MOVEM T2,FILBLK+.FOFNC ;[100] STORE FILOP. CHANNEL AND FUNCTION
SETZM FILBLK+.FOIOS ;[100] POINTER TO CMD LIST IS IN T0
PUSHJ P,%FILIO ;[207] DO FILOP I/O
JRST [HRLI T1,OFORED ;[100] ASSUME IT WAS OVERLAY FILE
SKIPNT ;[100] WAS IT?
HRLI T1,TFOWRT ;[100] NO--USE THE TEMPORARY FILE
JRST E$$IEF] ;[100] INPUT ERROR FOR FILE
POP P,T2 ;[100] RESTORE T2
POPJ P, ;[100] DONE
;STILL IN IFE TOPS20
;%USETO POSITIONS THE TEMPORARY FILE ON A SPECIFIED BLOCK NUMBER FOR WRITING.
;THE CALL IS:
;
; T1/ <ANYTHING>,,<BLOCK NUMBER>
;
;ALL ACS ARE SAVED.
%USETO: PUSH P,T1 ;[100] SAVE T1 OVER FILOP.
HRRZM T1,FILBLK+.FOIOS ;[100] POSITION FILE ON PROPER BLOCK
MOVE T1,TFOUSO ;[100] ..
TXO T1,FO.PRV ;[210] ASK FOR PRIVS IF WE'VE GOT THEM
MOVEM T1,FILBLK+.FOFNC ;[100] ..
MOVE T1,[.FOIOS+1,,FILBLK] ;[100] ..
FILOP. T1, ;[100] ..
JRST [HRLI T1,TFOWRT ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$OPE] ;[100] OUTPUT POSITIONING ERROR
POP P,T1 ;[100] RESTORE T1
POPJ P, ;[100] DONE
;%OUTZ WRITES DATA TO THE TEMPORARY FILE, PRESERVING ALL ACCUMULATORS. %OUTZ
;ASSUMES THAT THE COMMAND WORD IS ALREADY IN T0 AND NEEDS ONLY THE ENDING 0 IN
;T1.
%OUTZ: SETZ T1, ;[100] FINISH PRE-SPECIFIED LIST
PUSH P,T2 ;[100] SAVE AN AC FOR FILOP.
MOVE T2,TFOOUT ;[100] USE TEMPORARY FILE FOR WRITE
MOVEM T2,FILBLK+.FOFNC ;[100] STORE FILOP. CHANNEL AND FUNCTION
SETZM FILBLK+.FOIOS ;[100] POINTER TO CMD LIST IS IN T0
PUSHJ P,%FILIO ;[207] DO FILOP I/O
JRST [HRLI T1,TFOWRT ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$OEF] ;[100] OUTPUT ERROR FOR FILE
POP P,T2 ;[100] RESTORE T2
POPJ P, ;[100] DONE
;[207] %FILIO WILL EXECUTE A DUMP MODE IN OR OUT FILOP, BREAKING THE
;[207] IOWD UP INTO SMALL ENOUGH CHUNKS TO FIT INTO PHYSICAL MEMORY
;[207] LIMITS. THIS IS TO GET AROUND A DEFICIENCY IN PFH WHERE IT WILL
;[207] NOT DO BREAKDOWN OF FILOP I/O. ASSUMES T0 HAS THE IOWD,
;[207] TRASHES T1 AND T2.
%FILIO: PUSH P,T0 ;[207] SAVE IOWD
PUSH P,T3 ;[207] SCRATCH REGISTER TO KEEP SIZE IN
HLRO T3,T0 ;[207] GET SIZE TO DO IN NEGATIVE WORDS
MOVN T3,T3 ;[207] MAKE IT POSITIVE WORDS
%FILI1: CAIG T3,1000 ;[207] IS REQUEST LARGER THAN 1 PAGE?
JRST %FILI2 ;[207] NO, JUST DO IT.
PUSHJ P,%IOSIZ ;[207] FIND OUT WHAT SIZE IS ALLOWED
JUMPE T1,%FILI3 ;[207] NOT VIRTUAL, JUST GO DO IT.
CAML T1,T3 ;[207] WILL REQUEST FIT?
JRST %FILI2 ;[207] YES, JUST DO IT
MOVN T1,T1 ;[207] NO, SET UP FOR WHAT WE CAN DO
HRL T0,T1 ;[207] ADJUST IOWD TO DO WHAT WE CAN
%FILI2: SETZ T1, ;[207] END OF IOWD
%FILI3: MOVX T2,FO.PRV ;[210] WANT TO USE PRIVS
IORM T2,FILBLK+.FOFNC ;[210] PUT INTO BLOCK
MOVE T2,[.FOIOS+1,,FILBLK] ;[207] ARGUMENT WORD FOR FILOP
FILOP. T2, ;[207] DO THE I/O
JRST %FILI8 ;[207] FAILED, GIVE FAIL RETURN
HLRO T1,T0 ;[207] NEGATIVE AMOUNT WE DID
ADD T3,T1 ;[207] SUBTRACT AMOUNT DONE FROM
;[207] AMOUNT LEFT
JUMPE T3,%FILI7 ;[207] DONE
SUB T0,T1 ;[207] ADD AMOUNT DONE TO POINTER
MOVN T1,T3 ;[207] NEGATIVE SIZE TO GO
HRL T0,T1 ;[207] MAKE IOWD FOR AMOUNT LEFT TO DO
;[207] NOTE THAT THE CODE FROM %FILI4 THROUGH %FILI7 IS AN EXACT
;[207] DUPLICATE OF THE CODE FROM %FILI1 THROUGH %FILI4. THIS IS TO
;[207] EXPLICITLY DEFEAT THE CHECK IN PFH AT FULL1-2, WHERE HE CHECKS
;[207] THE PC OF THE UUO. THIS WILL CAUSE BIGXFR/1000 PAGE FAULTS AT
;[207] ONE PC, THEN THE SAME NUMBER OF PAGE FAULTS AT THE NEXT PC,
;[207] THEREBY BYPASSING THE DUMP MODE I/O CHECK
%FILI4: CAIG T3,1000 ;[207] IS REQUEST LARGER THAN 1 PAGE?
JRST %FILI5 ;[207] NO, JUST DO IT.
PUSHJ P,%IOSIZ ;[207] FIND OUT WHAT SIZE IS ALLOWED
JUMPE T1,%FILI6 ;[207] NOT VIRTUAL, JUST GO DO IT.
CAML T1,T3 ;[207] WILL REQUEST FIT?
JRST %FILI5 ;[207] YES, JUST DO IT
MOVN T1,T1 ;[207] NO, SET UP FOR WHAT WE CAN DO
HRL T0,T1 ;[207] ADJUST IOWD TO DO WHAT WE CAN
%FILI5: SETZ T1, ;[207] END OF IOWD
%FILI6: MOVX T2,FO.PRV ;[210] WANT TO USE PRIVS
IORM T2,FILBLK+.FOFNC ;[210] PUT INTO BLOCK
MOVE T2,[.FOIOS+1,,FILBLK] ;[207] ARGUMENT WORD FOR FILOP
FILOP. T2, ;[207] DO THE I/O
JRST %FILI8 ;[207] FAILED, GIVE FAIL RETURN
HLRO T1,T0 ;[207] NEGATIVE AMOUNT WE DID
ADD T3,T1 ;[207] SUBTRACT AMOUNT DONE FROM
;[207] AMOUNT LEFT
JUMPE T3,%FILI7 ;[207] DONE
SUB T0,T1 ;[207] ADD AMOUNT DONE TO POINTER
MOVN T1,T3 ;[207] NEGATIVE SIZE TO GO
HRL T0,T1 ;[207] MAKE IOWD FOR AMOUNT LEFT TO DO
JRST %FILI1 ;[207] AND LOOP
%FILI7: AOS -2(P) ;[207] SET UP SUCCESS RETURN
%FILI8: POP P,T3 ;[207] RESTORE SCRATCH REGISTER
POP P,T0 ;[207] AND RESTORE ORIGINAL IOWD
POPJ P, ;[207] AND RETURN
;[207] %IOSIZ - RETURN MAXIMUM SIZE FOR AN I/O REQUEST WHICH WILL NOT
;[207] CAUSE PROBLEMS WITH THE PAGE FAULT HANDLER. RETURNS T1/ NUMBER
;[207] OF WORDS (MULTIPLE OF 1000), PRESERVES ALL OTHER ACS ROUTINE
%IOSIZ: PUSH P,T4 ;[207] SAVE AN AC
HRROI T4,.GTVRT ;[207] GET VIRTUAL SIZE INFO
GETTAB T4, ;[207]
SETZ T4, ;[207]
HRROI T1,.GTSGN ;[207] GET HISEG INFO
GETTAB T1, ;[207]
SETZ T1, ;[207] GENERATE BOGUS VALUE IF IT FAILS
TLNE T1,(SN%SHR) ;[207] IS SEGMENT SHARABLE?
TDZA T1,T1 ;[207] SHARABLE, DON'T COUNT HISEG SIZE
LDB T1,[POINT 9,T4,26] ;[207] GET NUMBER OF HISEG PAGES
ANDI T4,777 ;[207] ISOLATE NUMBER OF LOSEG PAGES
ADD T4,T1 ;[207] ADD TOGETHER FOR VIRTUAL SIZE
HRROI T1,.GTSWP ;[207] GET SWAPPING (PHYSICAL) SIZE
GETTAB T1, ;[207] FROM MONITOR
SETZ T1, ;[207] IF IT FAILS, GENERATE A
;[207] BOGUS VALUE
ANDI T1,777 ;[207] ONLY NUMBER OF PAGES
CAMG T4,T1 ;[207] IS VIRTUAL SIZE GREATER
;[207] THAN PHYS?
JRST [ SETZ T1, ;[207] NO
JRST %IOSI3] ;[207] RETURN WITH FLAG TO DO TRANSFER
HRROI T1,.GTCVL ;[207] CURRENT MEMORY LIMITS
GETTAB T1, ;[207] ASK THE MONITOR
SETZ T1, ;[207] ZERO
TRZE T1,400000 ;[207] LIMIT VS GUIDELINE BIT SET?
TRNN T1,-1 ;[207] DO WE HAVE A LIMIT SET?
TRNA ;[207] NOPE, TRY FOR ACCOUNT LIMIT
JRST %IOSI2 ;[207] HAVE A LIMIT. USE IT.
HRROI T1,.GTMVL ;[207] ACCOUNT MEMORY LIMITS
GETTAB T1, ;[207] ASK THE MONITOR
SETZ T1, ;[207] THIS MONITOR HAS PROBLEMS.
TRNN T1,-1 ;[207] PHYSICAL LIMIT SET?
JRST T1,%IOSI2 ;[207] YES, USE THIS ONE
MOVX T1,%NSCMX ;[207] CORMAX
GETTAB T1, ;[207] ASK FOR MAX LIMIT ON ALL JOBS
SETZ T1, ;[207] SICK MONITOR
LSH T1,-^D9 ;[207] MAKE IT PAGES
%IOSI2: TLZ T1,-1 ;[207] CLEAR LEFT HALF
LSH T1,^D9 ;[207] MAKE INTO WORDS
SUBI T1,SLOSH ;[207] SLOSH FACTOR. SEE BELOW.
CAIL T1,BIGXFR ;[207] DON'T ALLOW LARGER THAN THIS
MOVEI T1,BIGXFR ;[207] MAX
CAIG T1,1000 ;[207] DON'T ALLOW LESS THAN THIS
MOVEI T1,1000 ;[207] MIN
%IOSI3: POP P,T4 ;[207] RESTORE SCRATCH AC
POPJ P, ;[207] RETURN
SLOSH==7*1000 ;[207]
BIGXFR==24*1000 ;[207]
;[207] SLOSH FACTOR ABOVE IS TO ALLOW FOR:
;[207] 2 PAGES PFH
;[207] 1 PAGE WITH PC OF FILOP
;[207] 1 PAGE WITH PSI VECTOR
;[207] 1 PAGE WITH JBINT VECTOR
;[207] 1 PAGE JOBDAT
;[207] 1 PAGE SLOSH
;[207] IF WE EVER NEED A LARGER SLOSH VECTOR, I'LL BE SURPRISED. IT'S
;[207] POSSIBLE BY MAKING PSI VECTOR AND JBINT BLOCK BE ON PAGE
;[207] BOUNDARIES AND HAVE THE IO NOT BE ON PAGE BOUNDARIES, BUT I'M
;[207] NOT GOING TO WORRY ABOUT IT.
;[207] BIGXFR IS SET TO 24 PAGES, WHICH IS TO AVOID TOO MANY PAGE
;[207] FAULTS ON THE SAME UUO AT ONCE. SEE TSTDMP+4 IN PFH. NOTE THAT
;[207] INCREASING THE NUMBER IN PFH WOULD ALLOW INCREASING THIS
;[207] NUMBER, BUT WOULD SHOW UP AS A PERFORMANCE HIT IN ORDINARY DUMP
;[207] MODE IOWD BREAKDOWN.
SUBTTL FILE ROUTINES -- TOPS-10 -- Overlay And Temp Files -- Argument Blocks
;STILL IN IFE TOPS20
;FILE SPECIFICATION BLOCK DEFINITIONS FOR GETSPC AND PRNFSP.
LOC 0 ;[100]
$FOFIL:!BLOCK .FOLEB+1 ;[100] FILOP. BLOCK
$FORIB:!BLOCK .RBEXT+1 ;[100] LOOKUP/ENTER BLOCK
$FOPTH:!BLOCK FTSFD+4 ;[100] PATH. BLOCK
RELOC ;[100]
SEGMENT LOW
;FILOP. ARGUMENT BLOCKS FOR INITIALIZING THE OVERLAY OR TEMPORARY FILE. THESE
;MUST BE LEFT INTACT FOR USE IN ERROR MESSAGES LATER. NOTE THAT THE FILOP.,
;LOOKUP, AND PATH. BLOCKS **MUST** BE CONSECUTIVE FOR GETSPC.
OFORED: .-.,,.FORED ;[100] FUNCTION AND FLAGS
.IODMP ;[100] ALL I/O IN DUMP MODE
.-. ;[100] DEVICE IS FILLED IN
0,,0 ;[100] DUMP MODE SO NO BUFFERS
0,,0 ;[100] ..
0,,OFOLKP ;[100] ADDRESS OF LOOKUP BLOCK
OFOLKP: 3 ;[100] LOOKUP BLOCK--COUNT OF ARGS
.-. ;[100] CHANGED TO PATH
.-. ;[100] CHANGED TO FILE NAME
.-. ;[100] CHANGED TO FILE EXTENSION
OFOPTH: BLOCK FTSFD+4 ;[100] CHANGED TO PATH
;ARGUMENT BLOCKS FOR THE TEMPORARY FILE INITIALIZATION.
TFOWRT: .-. ;[100] FUNCTION AND FLAGS
.IODMP ;[100] ALL I/O IN DUMP MODE
'DSK ' ;[100] DEFAULT DEVICE
0,,0 ;[100] DUMP MODE SO NO BUFFERS
0,,0 ;[100] ..
0,,TFOENT ;[100] ADDRESS OF ENTER BLOCK
TFOENT: 3 ;[100] BLOCK LENGTH
0 ;[100] DEFAULT PATH
.-.,,'OVL' ;[100] nnnOVL.TMP FILE NAME
'TMP',,.-. ;[100] ..
TFOREL: .-.,,.FOREL ;[100] CLOSE THE FILE
;STILL IN IFE TOPS20
;THESE ARGUMENT BLOCKS CONTAIN THE .FOFNC WORD FOR THE OVERLAY AND TEMPORARY
;FILE POSITIONING AND INPUT OPERATIONS. THE ASSIGNED CHANNEL NUMBER IS STORED IN
;THEM FOLLOWING INITIALIZATION. EACH IS COPIED TO FILBLK ALONG WITH THE
;APPROPRIATE ARGUMENT TO PERFORM A PARTICULAR OPERATION.
OFOUSI: .-.,,.FOUSI ;[100] POSITION FILE FOR INPUT
OFOINP: .-.,,.FOINP ;[100] READ DATA
TFOUSI: .-.,,.FOUSI ;[100] POSITION FILE FOR INPUT
TFOINP: .-.,,.FOINP ;[100] READ DATA
TFOUSO: .-.,,.FOUSO ;[100] POSITION FILE FOR OUTPUT
TFOOUT: .-.,,.FOOUT ;[100] WRITE DATA
FILBLK: BLOCK 2 ;[100] FILOP. ARG BLOCK FOR ABOVE
SEGMENT HIGH ;[100] BACK TO CODE
SUBTTL FILE ROUTINES -- TOPS-10 -- Error Messages
;STILL IN IFE TOPS20
;ALL TOPS-10 ERROR MESSAGE ROUTINES THAT PRINT THE FILE SPECIFICATION EXPECT:
;
; T1/ <ADDRESS OF I/O DATA BLOCK>,,<FILOP. ERROR CODE OR STATUS>
E$$NSD: PUSH P,T1 ;[100] SAVE FILE SPEC BLOCK ADDRESS
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <NSD No such device for >
POP P,T1 ;[100] GET BACK FILE SPEC ADDRESS
PUSHJ P,PRNFSP ;[100] PRINT THE AILING FILE SPEC
PUSHJ P,CRLF ;[100] END THE LINE
STOP
E$$CWF: PUSH P,T1 ;[100] SAVE FILE SPEC BLOCK ADDR
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <CWF Cannot write file >
.ERFS1: MOVE T1,(P) ;[100] GET BACK FILE SPEC ADDRESS
PUSHJ P,PRNFSP ;[100] PRINT AILING FILE SPEC
POP P,T1 ;[100] GET BACK FILE SPEC ADDRESS
PUSHJ P,PRNLEE ;[100] PRINT LOOKUP/ENTER ERROR
PUSHJ P,CRLF ;[100] END THE LINE
STOP ;[100] DIE NOW
E$$CFF: PUSH P,T1 ;[100] SAVE FILE SPEC BLOCK ADDR
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <CFF Cannot find file >
PJRST .ERFS1 ;[100] GO PRINT FILE SPEC AND REASON
E$$CUF: PUSH P,T1 ;[100] SAVE FILE SPEC BLOCK ADDRESS
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <CUF Cannot update file >
PJRST .ERFS1 ;[100] GO PRINT FILE SPEC AND REASON
;STILL IN IFE TOPS20
E$$CCF: PUSH P,T1 ;[100] SAVE FILE SPEC BLOCK ADDRESS
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <CCF Cannot close file >
.ERFS2: HRRZ T1,(P) ;[100] GET BACK FILE SPEC ADDRESS
PUSHJ P,PRNFSP ;[100] PRINT THE AILING FILE SPEC
TYPE <, status > ;[100] TYPE THE STATUS
POP P,T0 ;[100] GET BACK THE FILE STATUS
HRRZS T0 ;[100] ..
PUSHJ P,PRNOCT ;[100] PRINT THE FILE STATUS
PUSHJ P,CRLF ;[100] FINISH THE LINE
STOP ;[100] DIE NOW
E$$IPE: PUSH P,T1 ;[100] SAVE STATUS AND FILE SPEC BLOCK
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <IPE Input positioning error for file >
PJRST .ERFS2 ;[100] GO PRINT FILE SPEC AND STATUS
E$$IEF: PUSH P,T1 ;[100] SAVE STATUS AND FILE SPEC BLOCK
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <IEF Input error for file >
PJRST .ERFS2 ;[100] GO PRINT FILE SPEC AND STATUS
E$$OPE: PUSH P,T1 ;[100] SAVE STATUS AND FILE SPEC BLOCK
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <OPE Output positioning error for file >
PJRST .ERFS2 ;[100] GO PRINT FILE SPEC AND STATUS
E$$OEF: PUSH P,T1 ;[100] SAVE STATUS AND FILE SPEC BLOCK
PUSHJ P,FAIL ;[100] PRINT ?OVL
TYPE <OEF Output error for file >
PJRST .ERFS2 ;[100] GO PRINT FILE SPEC AND STATUS
SUBTTL FILE ROUTINES -- TOPS-10 -- Log File -- Initialization
;STILL IN IFE TOPS20
IFN FTLOG,<
LOGINI: SPUSH <T2,L> ;[100] SAVE SOME ACS
MOVE T1,LFOWRT+.FODEV ;[100] SEE IF DEVICE IS USER'S TERMINAL
DEVCHR T1, ;[100] ..
JUMPE T1,[HRLZI T1,LFOWRT ;[100] SELECT FILE SPEC FOR MESSAGE
JRST E$$NSD] ;[100] NO SUCH DEVICE
TXC T1,DV.TTA!DV.AVL ;[100] IF CONTROLLING TERMINAL AND
TXCN T1,DV.TTA!DV.AVL ;[100] AVAILABLE TO US
JRST [SETOM .OVRLO ;[100] THEN USE SIMPLER CALLS FOR OUTPUT
JRST LOGINX] ;[100] ..
MOVEI T1,LFOWRT+.FOIOS ;[100] GET BUFFER SIZES FOR FILOP.
DEVSIZ T1, ;[100] ..
PUSHJ P,E$$IMP ;[100] ?? DEVCHR SAID DEVICE EXISTS
HLRZ T2,T1 ;[100] COMPUTE TOTAL # WORDS
IMULI T2,(T1) ;[100] ..
MOVEM T2,SIZCOR ;[100] GET THAT MUCH FROM FUNCT.
CALL FUNCT.##,<<SPI,[F.GOT]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;[100] DID WE GET IT?
PUSHJ P,E$$MEF ;[100] NO--MEMORY EXPANSION FAILED
MOVE T1,ADDCOR ;[100] REMEMBER ARGS FOR LATER CLOSE
HRL T1,SIZCOR ;[100] ..
MOVEM T1,.OVRLO ;[100] ..
PUSH P,.JBFF## ;[100] MAKE BUFFERS GO IN NEW MEMORY
HRRZM T1,.JBFF## ;[100] ..
MOVX T1,FO.PRV+FO.ASC ;[210] ALLOCATE AN EXTENDED CHANNEL
HLLM T1,LFOWRT+.FOFNC ;[100] ..
MOVE T1,[.FOLEB+1,,LFOWRT] ;[100] OPEN THE LOG FILE
MOVE T0,LFOENT+.RBPPN ;[100] SAVE PPN FROM MAD MONITOR
FILOP. T1, ;[100]
JRST [MOVEM T0,LFOENT+.RBPPN ;[100] RESTORE PPN FOR ERROR MESSAGE
HRLI T1,LFOWRT ;[100] TELL ERROR ROUTINE WHICH SPEC
JRST E$$CWF] ;[100] CANNOT WRITE FILE
MOVEM T0,LFOENT+.RBPPN ;[100] RESTORE PPN FOR MESSAGES
POP P,.JBFF## ;[100] RESTORE .JBFF
LDB T1,[POINTR (LFOWRT+.FOFNC,FO.CHN)] ;[100] GET ALLOCATED CHANNEL
DPB T1,[POINTR (LFOOUT,FO.CHN)] ;[100] STORE WHERE NEEDED
DPB T1,[POINTR (LFOREL,FO.CHN)] ;[100] ..
LOGINX: SPOP <L,T2> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
> ;END IFN FTLOG
SUBTTL FILE ROUTINES -- TOPS-10 -- Log File -- I/O
;STILL IN IFE TOPS20
;OUTTTY EXPECTS A CHARACTER IN T0, AND UNCONDITIONALLY SENDS IT TO THE USER'S
;TERMINAL. TTYOUT IS CALLED INDIRECTLY VIA PRNCHR.
OUTTTY: OUTCHR T0, ;[100] PRINT THE CHARACTER
POPJ P, ;[100] DONE
;POSCHK GIVES A SKIP RETURN IF THE OUTPUT FILE IS CURRENTLY POSITIONED AT THE
;LEFT MARGIN, AND A NON-SKIP RETURN IF NOT (OR IF WE CAN'T TELL). THE LOG FILE
;IS ALWAYS CONSIDERED TO BE AT THE LEFT MARGIN. FOR THE USER'S TERMINAL, TOPS-10
;PROVIDES NO EASY FACILITY FOR CHECKING THIS THAT IS SYNCHRONIZED WITH
;CHARACTERS WE HAVE SENT TO THE TERMINAL. THEREFORE, WE WAIT UNTIL ALL OUTPUT TO
;THE TERMINAL HAS STOPPED (CHECKING LESS OFTEN IF THE TERMINAL IS PAGED), AND
;THEN READ THE TERMINAL'S HORIZONTAL POSITION.
POSCHK: SPUSH <T0,T1,T2,T3,T4> ;[107] SAVE THE ACS
MOVEI T1,OUTTTY ;[100] IS THE TERMINAL SELECTED?
CAME T1,PRNCHR ;[100] ..
JRST POSCX1 ;[100] NO--LOG FILE ALWAYS AT LEFT MARGIN
SETZB T0,T4 ;[100] SET SLEEP CTRS FOR SPEED FIRST TIME
SETO T3, ;[100] READ CONTROLLING TERMINAL'S PARMS
POSCH1: MOVE T1,[2,,2] ;[100] SET UP PERMANENT TRMOP. ARG
MOVEI T2,.TOSOP ;[100] IF TERMINAL'S BUFFER IS EMPTY
TRMOP. T1, ;[100] ..
JRST POSCH3 ;[100] THEN WE CAN READ POSITION
SOJGE T0,POSCH2 ;[100] ELSE TIME TO RECHECK PAGING
MOVEI T2,.TOSTP ;[100] TERMINAL PAGED?
TRMOP. T1, ;[100] ..
JRST POSCX ;[100] NO TRMOP.'S--ASSUME NOT AT LEFT
SKIPN T4,T1 ;[100] SLEEP 1 SEC OR 1 TICK
MOVEI T1,^D60 ;[100] WAIT AWHILE BEFORE CHECKING AGAIN
POSCH2: SLEEP T4, ;[100] WAIT FOR A WHILE
JRST POSCH1 ;[100] ..
POSCH3: MOVEI T2,.TOHPS ;[100] OUTPUT STOPPED--READ TERM'S POS
TRMOP. T1, ;[100] ..
JRST POSCX ;[100] NO TRMOP.'S, ASSUME NOT AT LEFT
SKIPN T1 ;[100] TERMINAL AT LEFT MARGIN?
POSCX1: AOS -5(P) ;[107] YES--GIVE SKIP RETURN
SPOP <T4,T3,T2,T1,T0> ;[107] RESTORE THE ACS
POSCX: POPJ P, ;[100] NO--GIVE NON-SKIP RETURN
;STILL IN IFE TOPS20
;OUTLOG EXPECTS A CHARACTER IN T0, AND UNCONDITIONALLY SENDS IT TO THE LOG FILE.
;OUTLOG IS CALLED INDIRECTLY VIA PRNCHR.
IFN FTLOG,<
OUTLOG: SOSGE LFOBUF+.BFCTR ;[100] ROOM FOR MORE CHARACTERS?
PJRST OUTLO1 ;[100] NO--TIME FOR OUTPUT
IDPB T0,LFOBUF+.BFPTR ;[100] YES--SIMPLY SEND THE CHARACTER
POPJ P, ;[100] DONE
OUTLO1: PUSH P,T1 ;[100] SAVE AN AC
MOVE T1,LFOOUT ;[100] BUILD FILOP. OUTPUT BLOCK FOR
TXO T1,FO.PRV ;[210] ASK FOR PRIVS IF WE'VE GOT THEM
MOVEM T1,FILBLK+.FOFNC ;[100] THE OUTPUT
SETZM FILBLK+.FOIOS ;[100] ..
MOVE T1,[.FOIOS+1,,FILBLK] ;[100] WRITE A BUFFER-FULL
FILOP. T1, ;[100] ..
JRST [HRLI T1,LFOWRT ;[100] SELECT PROPER FILE SPEC
JRST E$$OEF] ;[100] OUTPUT ERROR FOR FILE
POP P,T1 ;[100] RESTORE ACS
PJRST OUTLOG ;[100] TRY NOW
;STILL IN IFE TOPS20, IFN FTLOG
;LOGCLS CLOSES THE LOG FILE. IF THE TERMINAL IS THE LOG FILE, THEN WE SIMPLY
;STOP LOGGING. OTHERWISE, IF THE LOG FILE IS 'REAL', WE CLOSE IT AND RETURN THE
;MEMORY ASSIGNED FOR BUFFERS.
LOGCLS: PUSH P,L ;[100] SAVE ACS
SKIPG .OVRLO ;[100] IF IT'S JUST THE USER'S TERMINAL
JRST LOGCLX ;[210] THEN JUST STOP LOGGING
MOVX T1,FO.PRV ;[210] WANT TO USE PRIVS
IORM T1,LFOREL+.FOFNC ;[210] PUT INTO BLOCK
MOVE T1,[.FOFNC+1,,LFOREL] ;[100] ..
FILOP. T1, ;[100] ..
JRST [HRLI T1,LFOWRT ;[100] SELECT PROPER FILE SPEC
JRST E$$CCF] ;[100] CANNOT CLOSE FILE
MOVE T1,.OVRLO ;[100] FREE UP ASSIGNED BUFFER SPACE
HRRZM T1,ADDCOR ;[100] ..
HLRZM T1,SIZCOR ;[100] ..
CALL FUNCT.##,<<SPI,[F.ROT]>,<AS,OVLNAM>,<SPI,STATUS>,<SPI,ADDCOR>,<SPI,SIZCOR>>
SKIPE STATUS ;[100] WERE BUFFERS RETURNED OK?
JRST E$$CSM ;[100] NO--CANNOT SHRINK MEMORY
LOGCLX: SETZM .OVRLO ;[100] NO LOG FILE ANYMORE
POP P,L ;[100] RESTORE ACS
POPJ P, ;[100] DONE
> ;END IFN FTLOG
SUBTTL FILE ROUTINES -- TOPS-10 -- Log File -- Argument Blocks
;STILL IN IFE TOPS20, IFN FTLOG
;ARGUMENT BLOCKS FOR THE LOG FILE INITIALIZATION. NOTE THAT THE FILOP., LOOKUP,
;PATH., AND FILOP. GETSTS BLOCKS **MUST** BE CONSECUTIVE (SEE $FOFIL
;DEFINITIONS).
IFN FTLOG,<
SEGMENT LOW ;[213] PUT DATA AREA IN LOW SEG
LFOWRT: .-.,,.FOWRT ;[100] FUNCTION AND FLAGS
.IOASL ;[100] ASCII LINE MODE FOR I/O
.-. ;[100] DEVICE IS FILLED IN
LFOBUF,,0 ;[100] OUTPUT BUFFER HEADER
-1,,0 ;[205] DEFAULT NUMBER OF BUFFERS
0,,LFOENT ;[100] ADDRESS OF ENTER BLOCK
LFOENT: 3 ;[100] BLOCK LENGTH
.-. ;[100] DEFAULT PATH
.-. ;[100] CHANGED TO FILE NAME
.-. ;[100] CHANGED TO FILE EXTENSION
LFOPTH: BLOCK FTSFD+4 ;[100] CHANGED TO PATH
LFOBUF: BLOCK 3 ;[100] BUFFER HEADER
;THESE ARGUMENT BLOCKS CONTAIN THE .FOFNC WORD FOR THE LOG FILE I/O OPERATIONS.
;THE ASSIGNED CHANNEL NUMBER IS STORED IN THEM FOLLOWING LOG FILE
;INITIALIZATION. EACH IS COPIED TO FILBLK ALONG WITH THE APPROPRIATE ARGUMENT TO
;PERFORM A PARTICULAR OPERATION.
LFOOUT: .-.,,.FOOUT ;[100] WRITE DATA
LFOREL: .-.,,.FOREL ;[100] CLOSE THE LOG FILE
SEGMENT HIGH ;[213] BACK TO CODE SEG
> ;END IFN FTLOG
> ;END IFE TOPS20
SUBTTL FILE ROUTINES -- TOPS-20 -- Overlay And Temp Files -- Initialization
;HERE TO INITIALIZE THE OVERLAY FILE ON TOPS-20. SIMPLY GET A JFN ON IT, AND
;OPEN IT. THE CALL IS:
;
; STRPTR/ BYTE POINTER TO ASCIZ OVERLAY FILE SPECIFICATION, AS SUPPLIED BY
; THE USER IN INIOVL, OR DEFAULTED IN OVINI
IFN TOPS20,<
OVLINI: MOVX T1,GJ%OLD ;[100] FILE MUST EXIST
MOVEM T1,DEFTBL+.GJGEN ;[100] ..
HRROI T1,[ASCIZ /OVL/] ;[100] SET DEFAULT FILE TYPE TO .OVL
MOVEM T1,DEFTBL+.GJEXT ;[100] ..
MOVEI T1,DEFTBL ;[100] GET JFN FOR OVERLAY FILE
MOVE T2,STRPTR ;[42]
GTJFN% ;[41]
ERJMP [MOVE T1,STRPTR ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$CFF] ;[100] CANNOT FIND FILE
HRRZM T1,OVRJFN ;[100] SAVE THE JFN
MOVX T2,<<FLD ^D36,OF%BSZ>!OF%RD> ;[100] OPEN FOR INPUT, 36 BITS
OPENF% ;[100] ..
ERJMP [MOVE T1,OVRJFN ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$CRF] ;[100] CANNOT FIND FILE
POPJ P, ;[100] DONE
;TMPINI INITIALIZES THE TEMPORARY FILE ON TOPS-20. SIMPLY GET A JFN ON IT, AND
;OPEN IT.
TMPINI: MOVX T1,GJ%SHT!GJ%FOU!GJ%TMP ;[102] NEW TEMPORARY FILE
HRROI T2,TMPNAM ;[102] ..
GTJFN% ;[100] ..
ERJMP [MOVEI T1,TMPNAM ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$CFF] ;[100] CANNOT WRITE FILE
HRRZM T1,TMPJFN ;[100] SAVE JFN FOR LATER USE
MOVX T2,<<FLD ^D36,OF%BSZ>!OF%RD!OF%WR> ;[100] OPEN FOR READ AND WRITE
OPENF% ;[100] ..
ERJMP [MOVE T1,TMPJFN ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$CWF] ;[100] CANNOT WRITE FILE
POPJ P, ;[100] DONE
SUBTTL FILE ROUTINES -- TOPS-20 -- Overlay And Temp Files -- I/O
;STILL IN IFN TOPS20
;%USETU POSITIONS THE OVERLAY OR TEMPORARY FILE ON A SPECIFIED BLOCK NUMBER, AND
;REMEMBERS THAT BLOCK NUMBER IN UBLOCK. %USETI DOES THE SAME THING, BUT DOES NOT
;REMEMBER THE BLOCK NUMBER. THE CALL IS:
;
; T1/ <ANYTHING>,,<BLOCK NUMBER>
;
;ALL ACS ARE SAVED.
%USETU: HRRM T1,UBLOCK ;[100] STORE INCORE BLOCK TO BE
%USETI: SPUSH <T1,T2> ;[100] SAVE JSYS ACS
MOVEI T2,-1(T1) ;[42] GET BLOCK -1
LSH T2,7 ;[42] WORDS
MOVE T1,OVRJFN ;[100] ASSUME WE POSITION OVERLAY FILE
SKIPNT ;[100] TEMPORARY FILE INSTEAD?
MOVE T1,TMPJFN ;[100] YES--USE IT THEN
SFPTR% ;[100] POSITION THE FILE
ERJMP [MOVE T1,OVRJFN ;[100] SELECT PROPER FILE SPECIFICATION
SKIPNT ;[100] ..
MOVE T1,TMPJFN ;[100] ..
JRST E$$IPE] ;[100] INPUT POSITIONING ERROR
SPOP <T2,T1> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
;THE THREE ROUTINES HERE ALL READ DATA FROM THE OVERLAY OR TEMPORARY FILE,
;PRESERVING ALL ACCUMULATORS. %INB SETS UP A COMPLETE COMMAND LIST ASSUMING 200
;WORDS AT INBFR, %INZ ASSUMES THAT THE COMMAND WORD IS ALREADY IN T0 AND NEEDS
;ONLY THE ENDING 0 IN T1, AND %IN ASSUMES THAT THE ENTIRE LIST IS ALREADY SET
;UP, BEGINNING IN T0.
%INB: MOVE T0,[IOWD 200,INBFR]
%INZ: ;[100]
%IN: SPUSH <T2,T3> ;[100] SAVE JSYS ACS
MOVE T1,OVRJFN ;[100] ASSUME OVERLAY FILE
SKIPNT ;[100] IS IT THE TEMPORARY FILE INSTEAD?
MOVE T1,TMPJFN ;[100] YES--USE IT THEN
HRRZ T2,T0 ;[100] BUILD BYTE POINTER TO BUFFER
HRLI T2,(POINT 36,0,35) ;[100] ..
HLRO T3,T0 ;[42] - WORD COUNT
SIN% ;[100] READ IN THE DATA
ERJMP [MOVE T1,OVRJFN ;[100] SELECT PROPER FILE SPECIFICATION
SKIPNT ;[100] ..
MOVE T1,TMPJFN ;[100] ..
JRST E$$IEF] ;[100] INPUT ERROR FOR FILE
SPOP <T3,T2> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
;STILL IN IFN TOPS20
;%USETO POSITIONS THE TEMPORARY FILE ON A SPECIFIED BLOCK NUMBER FOR WRITING.
;THE CALL IS:
;
; T1/ <ANYTHING>,,<BLOCK NUMBER>
;
;ALL ACS ARE SAVED.
%USETO: SPUSH <T1,T2> ;[100] SAVE JSYS ACS
MOVEI T2,-1(T1) ;[100] GET BLOCK -1
LSH T2,7 ;[100] WORDS
MOVE T1,TMPJFN ;[100] SELECT THE TEMP FILE
SFPTR% ;[100] POSITION THE FILE
ERJMP [MOVE T1,TMPJFN ;[100] SELECT PROPER FILE SPEC
JRST E$$OPE] ;[100] OUTPUT POSITIONING ERROR
SPOP <T2,T1> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
;%OUTZ WRITES DATA TO THE TEMPORARY FILE, PRESERVING ALL ACCUMULATORS. %OUTZ
;ASSUMES THAT THE COMMAND WORD IS ALREADY IN T0.
%OUTZ: SPUSH <T2,T3> ;[100] SAVE JSYS ACS
MOVE T1,TMPJFN ;[100] SELECT THE TEMP FILE
HRRZ T2,T0 ;[100] BUILD BYTE POINTER TO BUFFER
HRLI T2,(POINT 36,0,35) ;[100] ..
HLRO T3,T0 ;[100] - WORD COUNT
SOUT% ;[102] WRITE OUT THE DATA
ERJMP [MOVE T1,TMPJFN ;[100] SELECT PROPER FILE SPEC
JRST E$$OEF] ;[102] OUTPUT ERROR FOR FILE
SPOP <T3,T2> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
SUBTTL FILE ROUTINES -- TOPS-20 -- Overlay And Temp Files -- Argument Blocks
;STILL IN IFN TOPS20
SEGMENT LOW
DEFTBL: .-. ;[100] GTJFN% FLAGS
.NULIO,,.NULIO ;[42] DON'T READ FROM ANYWHERE
0 ;[100]
0
0
.-. ;[100] DEFAULT TYPE
0
0
0
SEGMENT HIGH
SUBTTL FILE ROUTINES -- TOPS-20 -- Overlay And Temp Files -- Error Messages
;STILL IN IFN TOPS20
;GTJFN% FAILURE MESSAGES CANNOT BE PROVIDED THE JFN, SINCE ONE WAS NOT ASSIGNED.
;THUS, THESE EXPECT:
;
; T1/ ADDRESS OF FILE SPEC USED FOR THE GTJFN%
E$$CFF: PUSH P,T1 ;[100] SAVE THE FILE SPEC ADDRESS
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <CFF Cannot find file > ;[100]
.ERCF1: POP P,T1 ;[100] GET BACK THE FILE SPEC
PUSHJ P,PRNTXT ;[100] PRINT THE FILE SPECIFICATION
PUSHJ P,PRNJSE ;[100] GIVE SYSTEM'S REASON FOR FAILURE
PUSHJ P,CRLF ;[100] END THE LINE
STOP ;[100] DIE
;ALL OTHER FILE ERROR MESSAGE ROUTINES EXPECT:
;
; T1/ JFN OF THE FILE
E$$CWF: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <CWF Cannot write file > ;[100]
.ERCW1: POP P,T1 ;[100] GET BACK THE JFN
PUSHJ P,PRNFSP ;[100] PRINT THE FILE SPECIFICATION
PUSHJ P,PRNJSE ;[100] PRINT THE SYSTEM'S REASON
PUSHJ P,CRLF ;[100] END THE LINE
STOP ;[100] DIE
E$$CRF: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <CRF Cannot read file > ;[100]
PJRST .ERCW1 ;[100] PRINT FILE SPEC, REASON, AND DIE
E$$IPE: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <IPE Input positioning error for file > ;[100]
PJRST .ERCW1 ;[100] PRINT FILE SPEC, REASON, AND DIE
E$$IEF: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <IEF Input error for file > ;[100]
PJRST .ERCW1 ;[100] PRINT FILE SPEC, REASON, AND DIE
;STILL IN IFN TOPS20
E$$OPE: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <OPE Output positioning error for file > ;[100]
PJRST .ERCW1 ;[100] PRINT FILE SPEC, REASON, AND DIE
E$$OEF: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <OEF Output error for file > ;[100]
PJRST .ERCW1 ;[100] PRINT FILE SPEC, REASON, AND DIE
E$$CCF: PUSH P,T1 ;[100] SAVE THE JFN
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <CCF Cannot close file > ;[100]
PJRST .ERCW1 ;[100] PRINT FILE SPEC, REASON, AND DIE
E$$OPP: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <OPP Overlay handler in private page> ;[100]
PUSHJ P,CRLF ;[100] END THE LINE
STOP
E$$RPA: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <RPA RPACS% JSYS failed> ;[100]
PUSHJ P,PRNJSE
PUSHJ P,CRLF ;[100] END THE LINE
STOP
E$$RMP: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <RMP RMAP% JSYS failed> ;[100]
PUSHJ P,PRNJSE
PUSHJ P,CRLF ;[100] END THE LINE
STOP
SUBTTL FILE ROUTINES -- TOPS-20 -- Log File -- Initialization
;STILL IN IFN TOPS20
;HERE TO INITIALIZE THE LOG FILE ON TOPS-20. SIMPLY GET A JFN ON IT, AND OPEN
;IT. THE CALL IS:
;
; @(L)/ ADDRESS OF ASCIZ LOG FILE SPECIFICATION, AS SUPPLIED BY THE USER
LOGINI: PUSH P,T2 ;[100] SAVE AN AC FOR JSYSES
HRROI T2,@(L) ;[100] ..
LDB T5,[POINT 4,(L),12] ;[106]
CAIN T5,15 ;[106] IS IT A DESCRIPTOR BLOCK?
PUSHJ P,FIL.DS ;[106] YES - THEN FIX THE FILE SPEC
MOVX T1,GJ%FOU ;[100] NEW FILE
MOVEM T1,DEFTBL+.GJGEN ;[100] ..
MOVEI T1,DEFTBL ;[100] GET JFN FOR LOG FILE
GTJFN% ;[100] ..
ERJMP [HRRZ T1,.OVRLO ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$CFF] ;[100] CANNOT FIND FILE
HRRZM T1,.OVRLO ;[100] SAVE THE JFN
; Find out if spec is user's terminal, and set .OVRLO to -1,,.PRIOU if so.
; If so, release the JFN too.
MOVX T2,<<FLD ^D7,OF%BSZ>!OF%RD!OF%WR>
;[212] OPEN FOR WRITING, 7 BITS
OPENF% ;[100] ..
ERJMP [HRRZ T1,.OVRLO ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$CFF] ;[100] CANNOT FIND FILE
LOGINX: POP P,T2 ;[100] RESTORE ACS
POPJ P, ;[100] DONE
FIL.DS: DMOVE T2,@(L) ;[106] BYTE POINTER TO T2, COUNT TO T3
JUMPLE T3,E$$CFF ;[106] BYTE COUNT .LEQ. 0 IS AN ERROR
CAIL T3,^D130 ;[106] BYTE COUNT .GTR. 130 IS AN ERROR
JRST E$$CFF ;[106]
MOVSI T4,(POINT 7,0) ;[106] POINTER TO PUT STRING FOR
HRRI T4,SCRTCH ;[106] CONVERSION TO ASCIZ STRING
FILDS0: ILDB T1,T2 ;[106] MOVE STRING TO TEMP AREA
IDPB T1,T4 ;[106]
SOJN T3,FILDS0 ;[106] ARE WE DONE
MOVEI T1,0 ;[1O6] YES ADD NULL BYTE
IDPB T1,T4 ;[106] AT END OF FILE SPEC STRING
HRROI T2,SCRTCH ;[106] T2 GETS GTJFN'S STRING PTR
POPJ P, ;[106] RETURN TO DO GTJFN
SUBTTL FILE ROUTINES -- TOPS-20 -- Log File -- I/O
;OUTTTY EXPECTS A CHARACTER IN T0, AND UNCONDITIONALLY SENDS IT TO THE USER'S
;TERMINAL. OUTTTY IS CALLED INDIRECTLY VIA PRNCHR. NO ACS ARE DESTROYED.
OUTTTY: PUSH P,T1 ;[100] SAVE AN AC
MOVE T1,T0 ;[100] SEND THE CHARACTER
PBOUT% ;[100] ..
POP P,T1 ;[100] RESTORE THE CHARACTER
POPJ P, ;[100] DONE
;POSCHK GIVES A SKIP RETURN IF THE TERMINAL'S PRINT POSITION IS IN COLUMN 1
;(BEGINNING OF THE LINE), AND A NON-SKIP RETURN OTHERWISE. THIS IS USED TO
;ASSURE THAT MESSAGES BEGIN IN COLUMN 1 FOR BATCH.
POSCHK: JRST CPOPJ1 ;[100] FOR NOW--USE RFPTR% LATER
;OUTLOG EXPECTS A CHARACTER IN T0, AND UNCONDITIONALLY SENDS IT TO THE LOG FILE.
;OUTLOG IS CALLED INDIRECTLY VIA PRNCHR. NO ACS ARE DESTROYED.
IFN FTLOG,<
OUTLOG: SPUSH <T1,T2> ;[100] SAVE SOME ACS
MOVE T2,T0 ;[100] SEND THE CHARACTER
HRRZ T1,.OVRLO ;[100] ..
BOUT% ;[100] ..
ERJMP [HRRZ T1,.OVRLO ;[100] SELECT PROPER FILE SPECIFICATION
JRST E$$OEF] ;[100] OUTPUT ERROR FOR FILE
SPOP <T2,T1> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
SUBTTL FILE ROUTINES -- TOPS-20 -- Log File -- Closing
;STILL IN IFN TOPS20, IFE FTLOG
;LOGCLS CLOSES THE LOG FILE. IF THE TERMINAL IS THE LOG FILE, THEN WE SIMPLY
;STOP LOGGING. OTHERWISE, IF THE LOG FILE IS 'REAL', WE CLOSE IT.
LOGCLS: SKIPG .OVRLO ;[100] IF IT'S JUST THE USER'S TERMINAL
JRST LOGCLX ;[100] THEN JUST STOP LOGGING
HRRZ T1,.OVRLO ;[100] ELSE CLOSE THE LOG FILE
CLOSF% ;[100] ..
ERJMP [HRRZ T1,.OVRLO ;[100] SELECT PROPER FILE SPEC
JRST E$$CCF] ;[100] CANNOT CLOSE FILE
LOGCLX: SETZM .OVRLO ;[100] NO LOG FILE ANYMORE
POPJ P, ;[100] DONE
> ;END IFN FTLOG
> ;END IFN TOPS20
SUBTTL MANUAL CALL SUBROUTINES -- INIOV. - Initialize The Overlay File
IFN FTMANUAL,<
;INIOV. (AND ITS FORTRAN ALIAS INIOVL) ALLOWS THE USER TO EXPLICITLY INITIALIZE
;THE OVERLAY HANDLER BEFORE THE FIRST OVERLAY LINK IS IMPLICITLY REQUESTED. THIS
;ALLOWS THE USER TO SPECIFY THE FILE SPECIFICATION OF THE OVERLAY FILE IF IT IS
;NOT WHAT LINK THOUGHT IT WAS AT LOAD TIME. NOTE, HOWEVER, THAT THE OVERLAY FILE
;SPECIFIED MUST BE THE ACTUAL ONE THAT WAS CREATED WITH THE PROGRAM BEING RUN,
;AND NOT A DIFFERENT ONE. THE CALL IS:
;
; MOVEI 16,1+[-1,,0
; Z TYPE,[ASCIZ /file specification/]]
; PUSHJ 17,INIOV. ;OR INIOVL IN FORTRAN
ENTRY INIOV.
'INIOVL'
INIOV.: HRRZ T1,(P) ;[44] SAVE USER'S RETURN PC
MOVEM T1,USERPC ;[44] ..
SETZM OVLSPC ;[100] ASSUME USER SPECIFIED A SPEC
SKIPN -1(L) ;[100] ANY ARGUMENTS?
PJRST OVINI ;[100] NO, JUST NORMAL INITIALIZATION
SETOM OVLSPC ;[100] REMEMBER USER SUPPLIED A SPEC
IFE TOPS20,<
MOVX T1,'DSK ' ;[100] DEFAULT TO DSK:.OVL[-]
MOVEM T1,OFORED+.FODEV ;[100] ..
SETZM OFOLKP+.RBPPN ;[100] ..
MOVX T1,'OVL ' ;[100] ..
MOVEM T1,OFOLKP+.RBEXT ;[100] ..
MOVEI T1,OFORED ;[100] READ FILE SPEC INTO OFORED BLOCK
PUSHJ P,GETSPC ;[100] ..
> ;END IFE TOPS20
IFN TOPS20,<
LDB T1,[POINT 4,(L),12] ;[106] GET ARG TYPE
CAIN T1,15 ;[106] IS IT A DESCRIPTOR BLOCK?
PUSHJ P,OVL.DS ;[106] YES - GO BUILD AN ASCIZ STRING
HRROI T1,@(L) ;[42] GET POINTER TO ARG STRING
MOVEM T1,STRPTR ;SETUP PTR
> ;END IFN TOPS20
PUSHJ P,OVINI ;OPEN OVERLAY FILE
POPJ P, ;RETURN
IFN TOPS20,<
OVL.DS:
PUSHJ P,FIL.DS ;[106] CONVERT DESCR PTR TO STRING PTR
MOVE T1,T2 ;[106] GET STR PTR INTO T1
AOS (P) ;[106] RETURN +1
POPJ P, ;[106] TO DO GTJFN
>; END IFN TOPS20
SUBTTL MANUAL CALL SUBROUTINES -- GETOV. - Get A Link And All Of Its Superiors
;STILL IN IFN FTMANUAL
;GETOV. (AND ITS FORTRAN ALIAS GETOVL) ALLOW THE USER TO SPECIFICALLY REQUEST
;THAT A PARTICULAR LINK AND ITS SUPERIORS BE BROUGHT IN. THE CALL IS:
;
; MOVEI 16,1+[-1,,0 ;ONE ARG--ALL LINKS IN PATH BROUGHT IN
; Z TYPE,[LINK NAME]]
; PUSHJ P,GETOV. ;OR GETOVL IN FORTRAN
;
;LINK CAN BE A LINK NUMBER OR ASCII NAME, DEPENDING ON THE ARGUMENT TYPE (SEE
;GETNUM).
ENTRY GETOV.
'GETOVL'
GETOV.: HRRZ T1,(P) ;[44] SAVE USER'S RETURN PC
MOVEM T1,USERPC ;[44] ..
PUSH P,L ;SAVE L
PUSHJ P,GETCUR ;SEE WHO CALLED
PUSHJ P,GETNUM ;[100] CONVERT ARG IT TO A LINK NUMBER
JFCL GETOV.-1 ;INCASE OF ILL ARG TYPE
PUSHJ P,INCORE ;SEE IF ALREADY INCORE
JRST GTOVL1 ;[100] NO
PJRST POPL ;RESTORE AND RETURN
GTOVL1: PUSHJ P,CP0 ;[100] CHECK PATH
PJRST POPL ;[100] DONE
SUBTTL MANUAL CALL SUBROUTINES -- REMOV. - Remove A Link And All Inferiors
;STILL IN IFN FTMANUAL
;REMOV. DELETES THE REQUESTED LINK AND ALL OF ITS INFERIORS, THEN ATTEMPTS
;TO SHRINK MEMORY.
;
;CALL:
; MOVEI 16,1+[1,,0
; Z TYPE,[LINK]
; PUSHJ 17,REMOV.
;
;DEPENDING ON TYPE (SEE GETNUM) LINK CAN BE A LINK NUMBER OR ASCII NAME.
ENTRY REMOV.
'REMOVL'
REMOV.: HRRZ T1,(P) ;[44] SAVE USER'S RETURN PC
MOVEM T1,USERPC ;[44] ..
PUSH P,L ;[44] SAVE L
PUSHJ P,GETCUR ;[43] GET CURRENT LINK SETUP
PUSHJ P,GETNUM ;GET LINK # TO REMOVE
JFCL REMOV.-1 ;IN CASE OF ILL ARG TYPE
PUSHJ P,INCORE ;GET ADDRESS
JRST REMOV1 ;[43] NOT IN CORE--NOTHING TO DO
MOVEI P1,(T1) ;[43] GO DO THE WORK
PUSHJ P,DELPTH ;[43] ..
CALL FUNCT.##,<<SPI,[F.CBC]>,<AS,OVLNAM>,<SPI,STATUS>>
REMOV1: PJRST POPL ;[43] RESTORE AND RETURN
SUBTTL MANUAL CALL SUBROUTINES -- RUNOV. - Run An Overlay Link
;STILL IN IFN FTMANUAL
;RUNOV. (AND ITS FORTRAN ALIAS RUNOVL) ALLOW THE USER TO REPLACE A LINK WITH
;ANOTHER, AND START IT AT ITS START ADDRESS. THIS FACILITY WAS ORIGINALLY
;DESIGNED TO REPLACE LOADER'S OLD CHAIN FACILITY, AND IS NOT AS USEFUL OR
;GENERAL AS GETOVL. NOTE THAT A LINK THAT HAS BEEN RUN BY RUNOV. MAY NEVER
;RETURN. THE CALL IS:
;
; MOVEI 16,1+[-1,,0
; Z TYPE,[LINK NAME OR NUMBER]]
; PUSHJ P,RUNOV. ;OR RUNOVL IN FORTRAN
ENTRY RUNOV.
'RUNOVL'
RUNOV.: HRRZ T1,(P) ;[44] SAVE USER'S RETURN PC
MOVEM T1,USERPC ;[44] ..
PUSHJ P,GETCUR ;POINT TO CALLER
PUSHJ P,GETNUM ;CONVERT ARG TO A LINK NUMBER
JFCL RUNOV.-1 ;INCASE OF ILL ARG TYPE
PUSHJ P,INCORE ;SEE IF ALREADY INCORE
JRST [PUSH P,T0 ;SAVE LINK# INCASE WAS A NAME
SETOM OKOVLC ;[100] ALLOW OVERLAY OF CALLER
PUSHJ P,CP0 ;CHECK PATH
SETZM OKOVLC ;[43] DISALLOW OVERLAY OF CALLER
POP P,T0 ;RESTORE LINK #
JRST .-1] ;TRY AGAIN
HRRZ T0,CS.STA(T1) ;GET START ADDRESS
JUMPE T0,E$$NSA ;[100] SEE IF THERE'S A START ADDRESS
POP P,(P) ;[45] LOSE USER'S RETURN PC
JRST @T0 ;[45] SINCE LINK WILL NEVER RETURN
E$$NSA: MOVEM T1,THSLNK ;[45] SO WE CAN ADDRESS LINK
PUSHJ P,FAIL ;[100] PRINT ?OVL PREFIX
TYPE <NSA No start address for> ;[100]
PUSHJ P,PRNLNK ;PRINT NUMBER
PUSHJ P,CRLF ;[100] END THE LINE
STOP
SUBTTL MANUAL CALL SUBROUTINES -- SAVOV. - Mark A Link To Be Writable
;STILL IN IFN FTMANUAL
;SAVOV. (OR ITS FORTRAN ALIAS SAVOVL) ALLOWS THE USER TO DECLARE AN OVERLAY LINK
;TO BE WRITABLE. THIS DOES NOT AFFECT THE CURRENT STATE OF THE CODE IMMEDIATELY,
;BUT WAITS UNTIL THE LINK IS ABOUT TO BE OVERLAID. IF A LINK IS ALREADY
;WRITABLE, NOTHING NEW HAPPENS.
;
; MOVEI 16,1+[-n,,0 ;COUNT OF LINKS TO MAKE WRITABLE
; Z TYPE,[LINK]
; ...
; Z TYPE,[LINK]]
; PUSHJ 17,SAVOV. ;OR SAVOVL IN FORTRAN
;
;IF CALLED WITH NO ARGUMENTS, JUST INITIALIZE THE TEMPORARY FILE.
ENTRY SAVOV. ;[100]
'SAVOVL' ;[100] NAME FOR FORTRAN TRACE-BACK
SAVOV.: HRRZ T1,(P) ;[100] SAVE RETURN PC FOR ERRORS
MOVEM T1,USERPC ;[100] ..
SKIPN -1(L) ;[100] ANY ARGS?
JRST SAVOV2 ;[100] NO--JUST SET UP TEMP FILE
PUSH P,L ;[100] SAVE L FOR AOBJN POINTER
HLL L,-1(L) ;[100] MAKE AOBJN POINTER FOR ARGS
PUSHJ P,GETCUR ;[100] GET DATA ABOUT CALLER'S LINK
SAVOV1: PUSHJ P,GETNUM ;[100] GET NEXT LINK NUMBER IN T0
JFCL SAVOV.-1 ;[100] IN CASE OF ILLEGAL ARG TYPE
PUSHJ P,WRTPTR ;[100] GET BYTE POINTER TO OW TABLE
LDB T1,T0 ;[100] GET CURRENT VALUE IN CASE PAGED
TXO T1,OW.WRT ;[100] MAKE LINK WRITABLE
DPB T1,T0 ;[100] STORE FLAGS BACK
AOBJN L,SAVOV1 ;[100] LOOP FOR MORE LINKS
SAVOV2: MOVE T1,DI+DI.FLG ;[100] INITIALIZE TEMPORARY FILE
TXNN T1,OD.WRT ;[100] IF IT HASN'T BEEN YET
PUSHJ P,TMPINI ;[100] ..
MOVX T1,OD.WRT ;[100] MARK THAT IT'S NOW WRITABLE
ORM T1,DI+DI.FLG ;[100] ..
PJRST POPL ;[100] DONE
SUBTTL MANUAL CALL SUBROUTINES -- CLROV. - Mark A Link To Not Be Writable
;STILL IN IFN FTMANUAL
;CLROV. (OR ITS FORTRAN ALIAS CLROVL) ALLOWS THE USER TO DECLARE AN OVERLAY LINK
;TO NOT BE WRITABLE. THIS DOES NOT AFFECT THE CURRENT STATE OF THE CODE
;IMMEDIATELY, BUT WAITS UNTIL THE LINK IS ABOUT TO BE OVERLAID OR READ IN. IF A
;LINK IS ALREADY NOT WRITABLE, NOTHING NEW HAPPENS.
;
; MOVEI 16,1+[-n,,0 ;COUNT OF LINKS TO MAKE NOT WRITABLE
; Z TYPE,[LINK]
; ...
; Z TYPE,[LINK]]
; PUSHJ 17,CLROV. ;OR CLROVL IN FORTRAN
ENTRY CLROV. ;[100]
'CLROVL' ;[100] NAME FOR FORTRAN TRACE-BACK
CLROV.: HRRZ T1,(P) ;[100] SAVE RETURN PC FOR ERRORS
MOVEM T1,USERPC ;[100] ..
SKIPN -1(L) ;[100] ANY ARGS?
POPJ P, ;[100] NO--ALL DONE THEN
PUSH P,L ;[100] SAVE L FOR AOBJN POINTER
HLL L,-1(L) ;[100] MAKE AOBJN POINTER FOR ARGS
PUSHJ P,GETCUR ;[100] GET DATA ABOUT CALLER'S LINK
CLROV1: PUSHJ P,GETNUM ;[100] GET NEXT LINK NUMBER IN T0
JFCL CLROV.-1 ;[100] IN CASE OF ILLEGAL ARG TYPE
PUSHJ P,WRTPTR ;[100] GET BYTE POINTER TO OW TABLE
SETZ T1, ;[100] NOT WRITABLE, NOT PAGED
DPB T1,T0 ;[100] STORE FLAGS BACK
AOBJN L,CLROV1 ;[100] LOOP FOR MORE LINKS
PJRST POPL ;[100] DONE
SUBTTL MANUAL CALL SUBROUTINES -- LOGOV. - Manipulate The Log File
;STILL IN IFN FTMANUAL
;LOGOV. (OR ITS FORTRAN ALIAS LOGOVL) CONTROLS THE RUN-TIME OVERLAY LOG FILE.
;THERE ARE THREE POSSIBLE CALLS:
;
; MOVEI 16,1+[0,,0] ;NO ARGUMENTS
; PUSHJ 17,LOGOV.
;
;THE ABOVE CALL CLOSES ANY CURRENTLY OPEN LOG FILE.
;
; MOVEI 16,1+[-1,,0 ;1 ARGUMENT
; Z TYPE,[ASCIZ /file specification/]]
; PUSHJ 17,LOGOV.
;
;THE ABOVE CALL CAN BE IN TWO CASES. IF THE FILE SPECIFICATION REFERS TO THE
;USER'S CONTROLLING TERMINAL, SIMPLE TERMINAL OUTPUT CALLS ARE USED TO WRITE THE
;LOG FILE. IF THE FILE SPECIFICATION REFERS TO ANYTHING ELSE, GENERAL I/O IS
;DONE.
IFN FTLOG,<
ENTRY LOGOV.
'LOGOVL'
LOGOV.: HRRZ T1,(P) ;[100] SAVE USER'S PC FOR ERROR MESSAGES
MOVEM T1,USERPC ;[100] ..
SPUSH <T2,L> ;[100] SAVE SOME ACS
SKIPE .OVRLO ;[100] CLOSE LOG FILE IF OPEN
PUSHJ P,LOGCLS ;[100] ..
SKIPN -1(L) ;[100] LOG FILE SPECIFIED?
JRST LOGOVX ;[100] NO--NOTHING MORE TO DO
IFE TOPS20,<
MOVX T1,'DSK ' ;[100] DEFAULT TO DSK:.LOG[-]
MOVEM T1,LFOWRT+.FODEV ;[100] ..
MOVX T1,'LOG ' ;[100] ..
MOVEM T1,LFOENT+.RBEXT ;[100] ..
SETZM LFOENT+.RBPPN ;[100] ..
MOVEI T1,LFOWRT ;[100] READ THE LOG FILE SPECIFICATION
PUSHJ P,GETSPC ;[100] ..
> ;END IFE TOPS20
; ..
; ..
;STILL IN IFN FTMANUAL
IFN TOPS20,<
HRROI T1,[ASCIZ /LOG/] ;[100] DEFAULT TO .LOG
MOVEM T1,DEFTBL+.GJEXT ;[100] ..
> ;END IFN TOPS20
PUSHJ P,LOGINI ;[100] INITIALIZE THE LOG FILE
LOGOVX: SPOP <T2,L> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
> ;END IFN FTLOG
> ;END OF IFN FTMANUAL
SUBTTL SUBROUTINES -- GETNUM - Get Link Number From Name Or Number
;GETNUM CONVERTS AN ARGUMENT FROM A SUBROUTINE CALL TO A LINK NUMBER. DEPENDING
;ON THE ARGUMENT TYPE, THE LINK CAN BE SPECIFIED AS A NUMBER, 5 OR 10
;CHARACTERS, OR AN ASCIZ STRING. THE CALL IS:
;
; L/ ADDRESS OF CURRENT ARGUMENT POINTER
GETNUM: LDB T1,[POINT 4,0(L),12] ;GET TYPE
JRST @TYPTBL(T1) ;DO CONVERSION
TYPTBL: A.UND,TY.SP ;[100] UNDEFINED, ASSUME ASCII OR INTEGER #
A.LOG,TY.SP ;[100] LOGICAL, ASSUME ASCII OR INTEGER #
A.SPI,TY.SP ;[100] INTEGER, ASSUME ASCII OR INTEGER #
3,E$$IAT ;[100] RESERVED
A.SPR,TY.SP ;[100] REAL, ASSUME ASCII OR INTEGER #
5,E$$IAT ;[100] RESERVED
A.OCT,TY.SP ;[100] OCTAL, ASSUME ASCII OR INTEGER #
A.LBL,E$$IAT ;[100] LABEL
A.DPR,TY.DP ;[100] DOUBLE REAL, ASSUME ASCII OR INTEGER #
A.DPI,TY.DP ;[100] DOUBLE INTEGER, ASSUME ASCII OR INTEGER #
A.DO ,TY.DP ;[100] DOUBLE OCTAL, ASSUME ASCII OR INTEGER #
13,E$$IAT ;[100] RESERVED
A.CMP,TY.DP ;[100] COMPLEX, ASSUME ASCII OR INTEGER #
A.DSC,TY.DS ;[104] BYTE STRING
16,E$$IAT ;[100] RESERVED
A.AS,TY.STR ;[100] ASCIZ STRING
E$$IAT: PUSHJ P,FAIL ;[100]
TYPE <IAT Illegal argument type on call to > ;[100]
MOVE T1,(P) ;[44] GET ROUTINE NAME POINTED TO
MOVE T1,@(T1) ;[44] BY THE JFCL
PUSHJ P,PRNSBX ;PRINT IT
TYPE < from PC = > ;[100]
MOVE T0,USERPC ;[44] GET USER'S PC FOR MESSAGE
SUBI T0,1 ;[44] MAKE IT PC OF CALL
PUSHJ P,PRNOCT
PUSHJ P,CRLF ;[44] END THE LINE
STOP ;[44] DIE
TY.DP0: MOVE T0,T1 ;PUT LOW ORDER WORD INTO HIGH
CAIA ;CANNOT SKIPA OVER 0
TY.SP: MOVE T0,@(L) ;GET ARG
TLNN T0,-1 ;18 BITS?
POPJ P, ;YES, MUST BE NUMBER
PUSHJ P,TY.PTR ;SAVE ACC AND SETUP PTRS
TY.SP1: ILDB T1,T2 ;GET CHAR
SKIPE T1 ;LEAVE NULL ALONE
SUBI T1," " ;SIXBITIZE
IDPB T1,T3 ;STORE
TLNE T2,(77B5) ;MORE TO READ?
JRST TY.SP1 ;YES
ANDCMI T0,77 ;CLEAR 6TH CHAR
;NOW TO CONVERT NAME TO A LINK NUMBER
TY.NO: MOVE T3,T0 ;PUT IN SAFE PLACE
MOVE T1,DI+DI.NPT ;[100] GET BLOCK
HLRE T2,T1 ;TOTAL WORD LENGTH
PUSHJ P,%USETU ;SET ON BLOCK
TY.NO1: PUSHJ P,%INB ;READ A BLOCK
MOVE T1,[-100,,INBFR] ;FORM AOBJN WORD
TY.NO2: CAMN T3,1(T1) ;MATCH?
JRST TY.NO3 ;YES
ADDI T1,1
AOBJN T1,TY.NO2 ;LOOP IN THIS BLOCK
ADDI T2,200 ;SEE IF MORE BLOCKS
JUMPL T2,TY.NO1 ;YES
E$$ULN: PUSHJ P,FAIL ;[100] PRINT ?OVL PREFIX
TYPE <ULN Unknown link name > ;[100]
MOVE T1,T3 ;[100] PRINT THE BAD LINK NAME
PUSHJ P,PRNSBX ;[100] ..
PUSHJ P,CRLF ;[100] END THE LINE
STOP
TY.NO3: HRRZ T0,0(T1) ;GET NUMBER
JRST T3POPJ ;RESTORE
TY.DP:DMOVE T0,@(L) ;[200] GET ARG
JUMPE T0,TY.DP0 ;LOW ORDER ONLY?
JUMPE T1,TY.SP ;HIGH ORDER ONLY?
PUSHJ P,TY.PTR ;SAVE ACCS AND SETUP PTRS
PUSH P,T4 ;NEED ANOTHER ACC
TY.DP1: ILDB T4,T2 ;GET CHAR
SKIPE T4 ;LEAVE NULL ALONE
SUBI T4," " ;SIXBITIZE
IDPB T4,T3 ;STORE
TLNE T3,(77B5) ;MORE TO STORE?
JRST TY.DP1 ;YES
POP P,T4 ;RESTORE LAST ACC
JRST TY.NO ;AND CONVERT TO NUMBER
TY.STR: PUSHJ P,TY.PTR ;SAVE ACCS AND SETUP PTRS
HRRI T2,@(L) ;FILL IN INPUT ADDRESS
SETZ T0, ;START WITH 0
TYSTR1: ILDB T1,T2 ;GET CHAR
JUMPE T1,TY.NO ;DONE, NOW CONVERT TO LINK #
SUBI T1," " ;SIXBITIZE
TLNE T3,(77B5) ;RAN OUT OF SPACE?
IDPB T1,T3 ;NO
JRST TYSTR1 ;LOOP
;*********
;HERE TO PROCESS DESCRIPTOR - FIRST WORD POINTER TO STRING
;SECOND WORD BYTE COUNT
TY.DS: SPUSH <T2,T3,T4> ;[106] SAVE SOME ACS
DMOVE T2,@(L) ;[106]
JUMPLE T3,E$$ULN ;[106] IF BYTE COUNT < OR = ZERO - ERROR
CAILE T3,6 ;[106] MORE THAN 6 CHARACTERS?
MOVEI T3,6 ;[1O6] YES - USE THE FIRST SIX
MOVSI T4,(POINT 6,T0) ;[106] WRITE PTR
SETZ T0, ;[106] CLEAR T0 FOR SIXBIT STRING USE
TYQSTR: ILDB T1,T2 ;[106] GET BYTE
SUBI T1," " ;[106] MAKE IT SIXBIT
IDPB T1,T4 ;[106] WRITE IT TO T0
SOJN T3,TYQSTR ;[106] IF NOT END OF STRING GET NEXT
POP P,T4 ;[106] RESTORE T4
JRST TY.NO ;[106] OTHERWISE GO CONVERT IT TO A LINK #
;**********
TY.PTR: EXCH T2,(P) ;PUT T2 ON STACK
SPUSH <T3,T2> ;SAVE TWO ACCS
MOVSI T2,(POINT 7,T0) ;READ PTR
MOVSI T3,(POINT 6,T0) ;WRITE PTR
POPJ P,
SUBTTL SUBROUTINES -- GETSPC - Convert String Into FILOP. Block
;GETSPC CONVERTS AN ASCIZ FILE SPECIFICATION TO INFORMATION SUITABLE FOR A
;FILOP. UUO. THE CALL IS:
;
; T1/ ADDRESS OF FILOP., FOLLOWED BY LOOKUP/ENTER, FOLLOWED BY PATH.
; BLOCK
; L/ ADDRESS OF ARGUMENT BLOCK
;
;ON RETURN, THE FILE INFORMATION HAS BEEN FILLED IN TO THE VARIOUS BLOCKS.
IFE TOPS20,<
GETSPC: SPUSH <T2,T3,T4,L> ;[100] SAVE SOME ACS
MOVE T3,T1 ;[100] SAVE ADDRESS OF FILOP. INFO
LDB T2,[POINT 7,(L),12] ;[106]
CAIN T2,15 ;[106]
MOVEI L,@(L) ;[106]
MOVEI L,@(L) ;[100] BUILD BYTE POINTER TO STRING
HRLI L,(POINT 7,) ;FORM INPUT BYTE PTR
PUSHJ P,GETSBX ;GET DEVICE
CAIE T1,":" ;WAS IT?
JRST GETNAM ;NO, TRY FILE NAME
MOVEM T0,$FOFIL+.FODEV(T3) ;[100] YES--STORE DEVICE
PUSHJ P,GETSBX ;GET FILE NAME
GETNAM: MOVEM T0,$FORIB+.RBNAM(T3) ;[100] STORE FILE NAME
CAIE T1,"." ;EXT TO FOLLOW?
JRST GETPRJ ;NO, TRY PPN
PUSHJ P,GETSBX ;GET EXT
HLLZM T0,$FORIB+.RBEXT(T3) ;[100] STORE EXTENSION
GETPRJ: SETZM $FORIB+.RBPPN(T3) ;[100] ASSUME DEFAULT PATH
CAIE T1,"[" ;PPN TO FOLLOW?
PJRST GETSPX ;[100] NO--DONE
PUSHJ P,GETOCT ;GET PRJ
TRNN T0,-1 ;IS IT [,XXX]?
HLRZ T0,MYPPN ;[100] YES--FILL IN FROM LOGGED IN PPN
HRLZM T0,$FORIB+.RBPPN(T3) ;[100] SAVE FIRST HALF OF PPN
PUSHJ P,GETOCT ;GET PRG
TRNN T0,-1 ;IS IT [XXX,] ?
HRRZ T0,MYPPN ;[100] YES--FILL IN FROM LOGGED IN PPN
HRRM T0,$FORIB+.RBPPN(T3) ;[100] STORE REST OF PPN
; ..
; ..
;STILL IN IFE TOPS20
IFN FTSFD,<
CAIN T1,"]" ;CLOSED CORRECTLY?
JRST GETSPX ;[100] YES--NO SFD'S
MOVE T1,$FORIB+.RBPPN(T3) ;[100] SFD'S--MOVE PPN TO PATH. BLOCK
MOVEM T1,$FOPTH+.PTPPN(T3) ;[100] ..
MOVEI T1,$FOPTH(T3) ;[100] AND POINT LOOKUP/ENTER BLOCK
MOVEM T1,$FORIB+.RBPPN(T3) ;[100] TO IT
MOVSI T4,-FTSFD ;[100] READ AND STORE ALL SFD'S
HRRI T4,$FOPTH+.PTSFD(T3) ;[100] ..
GETSP3: PUSHJ P,GETSBX ;[100] ..
MOVEM T0,(T4) ;[100] ..
CAIN T1,"," ;MORE?
AOBJN T4,GETSP3 ;[100] YES--CAN WE TAKE MORE?
> ;END OF IFN FTSFD
GETSPX: SPOP <L,T4,T3,T2> ;[100] RESTORE ACS
POPJ P, ;[100] DONE
> ;END IFE TOPS20
SUBTTL SUBROUTINES -- GETSBX - Convert To SIXBIT, GETOCT - Convert To Octal
;GETSBX CONVERTS ALPHANUMERIC CHARACTERS IN AN ASCIZ STRING TO SIXBIT. THE CALL IS:
;
; L/ BYTE POINTER TO ASCIZ STRING
;
;RETURNS:
;
; T0/ SIXBIT WORD
; T1/ BREAK CHARACTER
;
;DESTROYS T2.
GETSBX: MOVX T2,<POINT 6,T0> ;[100] SET UP BYTE POINTER TO RESULT
SETZ T0,
GTSBX1: ILDB T1,L ;GET NEXT CHAR
CAIL T1,"a" ;TEST FOR LOWER CASE
CAILE T1,"z" ;...
CAIA ;NO
SUBI T1,"a"-"A" ;MAKE UPPER CASE
CAIL T1,"0" ;TEST FOR VALID ALPHANUMERICS
CAILE T1,"Z" ;...
POPJ P, ;END TEST FAILED
CAILE T1,"9" ;SEE IF 0-9
CAIL T1,"A" ;OR A-Z
CAIA ;YES
POPJ P, ;NO
SUBI T1," "-' ' ;[100] SIXBITIZE
CAME T1,[POINT 6,T0,35] ;[100] HAVE WE STORED 6 CHARS ALREADY?
IDPB T1,T2 ;[100] NO--STORE ANOTHER
JRST GTSBX1 ;LOOP
;GETOCT RETURNS THE OCTAL REPRESENTATION OF A NUMBER IN AN ASCIZ STRING. THE
;CALL IS:
;
; L/ BYTE POINTER TO THE ASCIZ STRING
;
;RETURNS:
;
; T0/ OCTAL NUMBER
; T1/ BREAK CHARACTER
GETOCT: SETZ T0, ;CLEAR STORE AC
GTOCT1: ILDB T1,L ;GET NEXT CHAR
CAIL T1,"0" ;TEST FOR VALID OCTAL
CAILE T1,"7" ;ONLY
POPJ P, ;BREAK
LSH T0,3 ;MAKE SPACE
ADDI T0,-"0"(T1) ;[100] STORE NEW DIGIT
JRST GTOCT1 ;LOOP
SUBTTL SUBROUTINES -- GETCUR - Get Link Information Of Caller
GETCUR: SPUSH <T2,T3,T4> ;NEED SOME ACCS
MOVE T4,USERPC ;[44] GET USER'S RETURN PC
SKIPN T1,FSTLNK ;GET START OF OVERLAY LIST
PUSHJ P,OVINI ;NOT YET SETUP
MOVE T1,FSTLNK ;IT IS NOW
GTCUR1: HLRZ T3,CS.SIZ(T1) ;GET LENGTH OF LINK
HRRZ T2,CS.ADR(T1) ;AND LOWER BOUND
ADD T3,T2 ;UPPER BOUND
CAML T4,T2 ;SEE IF ENCLOSED
CAML T4,T3 ;BETWEEN T2 .LT. L .LT. T3
JRST GTCUR2 ;NO
GTCUR4: MOVEM T1,CURLNK ;SAVE PTR TO LINK
MOVE T2,CS.NUM(T1) ;GET LINK NUMBER
MOVEM T2,CURNUM ;SAVE IT
POP P,T4 ;LEAVE THIS POP OUT OF T3POPJ!!
T3POPJ: SPOP <T3,T2>
POPJ P,
GTCUR2: HRRZ T1,CS.FPT(T1) ;GET NEXT
JUMPN T1,GTCUR1 ;VALID?
HRRZ T3,.JBHRL## ;GET END OF HIGH SEG, IF ANY
JUMPE T3,GTCUR3 ;NO HIGH SEG, NOT POSSIBLE!
HRRZ T3,.JBREL## ;HIGHEST ADDRESS IN LOW SEG
CAIGE T3,400000 ;LOW SEG OVER 128K?
MOVEI T3,377777 ;NO, ASSUME HI SEG STARTS AT 128K
IFE TOPS20,<
MOVE T2,[-2,,.GTUPM] ;NEED TO FIND HI-SEG ORIGIN
GETTAB T2, ;CURRENTLY AVAIL ONLY BY GETTAB
SKIPA ;NOT THERE, ASSUME 400000
SKIPN T2 ;GETTAB IMPLIMENTED?
> ;END IFE TOPS20
MOVSI T2,1(T3) ;NO, ASSUME DEFAULT
HLRZ T2,T2 ;PUT IN CORRECT PLACE
ANDCMI T2,777 ;ZAP BITS RESERVED FOR FUTURE
HRRZ T3,.JBHRL## ;GET HIGHEST LEGAL ADDR IN HI SEG
CAML T4,T2 ;IS THIS FROM THE HIGH SEG?
CAMLE T4,T3 ;MAYBE. IS IT?
GTCUR3: PUSHJ P,E$$IMP ;[100] NO, NOT POSSIBLE!
MOVE T1,FSTLNK ;YES, PRETEND FROM THE ROOT
JRST GTCUR4 ;AND GO FILL THINGS IN
SUBTTL SUBROUTINES -- INCORE, WRTPTR
;INCORE CHECKS TO SEE IF A LINK IS IN MEMORY. THE CALL IS:
;
; T0/ LINK NUMBER
;
;INCORE GIVES A SKIP RETURN WITH THE LINK'S ADDRESS IF THE LINK IS IN MEMORY,
;AND A NON-SKIP RETURN OTHERWISE.
INCORE: MOVE T1,FSTLNK ;GET START
CAMN T0,CS.NUM(T1) ;ONE WE WANT?
JRST CPOPJ1 ;YES
HRRZ T1,CS.FPT(T1) ;NO, GET NEXT
JUMPN T1,.-3
POPJ P,
;WRTPTR RETURNS A BYTE POINTER TO THE WRITABLE LINK FLAGS FOR A SPECIFIED LINK.
;THIS IS USED TO TEST AND SET THE WRITABLE STATUS OF A LINK. THE CALL IS:
;
; T0/ LINK NUMBER
;
;ON RETURN, T0 CONTAINS THE BYTE POINTER. T1 IS USED.
WRTPTR: IDIVI T0,^D18 ;[100] FLAGS ARE 2 BITS PER LINK
ADD T0,[POINT 2,OW,35] ;[100] ADD TEMPLATE BYTE POINTER TO ADDR
IMULI T1,-2 ;[100] COMPUTE P FIELD OF BYTE POINTER
ADDI T1,^D36 ;[100] ..
DPB T1,[POINT 6,T0,5] ;[100] STORE IN P FIELD
POPJ P, ;[100] DONE
SUBTTL SUBROUTINES -- GETJOB - Get Job Number For Temporary File Name
;ON TOPS-10, GETJOB SETS JOBNUM TO CONTAIN <SIXBIT JOB #>,,<BINARY JOB #>. THIS
;IS USED IN THE CREATION OF THE TEMPORARY FILE NAME.
IFE TOPS20,<
GETJOB: PJOB T0, ;[100] GET JOB NUMBER
HRRZM T0,JOBNUM ;[100] SAVE IN RIGHT HALF
MOVEI T3,3 ;[100] PICK UP 3 CHARS
PJLOOP: IDIVI T0,^D10 ;[100] ONE AT A TIME
ADDI T1,'0' ;[100] MAKE SIXBIT
LSHC T1,-6 ;[100] SAVE CHAR
SOJG T3,PJLOOP
HLLM T2,JOBNUM ;[100] SAVE SIXBIT FOR TMP FILES
GETPPN T1, ;[100] GET LOGGED IN PPN
JFCL ;[100] OVRLAY WITH JACCT?
MOVEM T1,MYPPN ;[100] SAVE FOR LATER
POPJ P, ;[100] DONE
> ;END IFE TOPS20
SUBTTL SUBROUTINES -- CHKDDT - Update Symbol Table Pointers On TOPS-20
;ROUTINE TO STUFF C(.JBSYM) INTO DDT IF DDT IS IN MEMORY (TOPS-20 ONLY).
;THIS IS BECAUSE DDT DOESN'T LOOK FOR SYMBOL TABLES IN JOBDAT, BUT MUST
;BE FORCE-FED. SAVES ALL ACS.
IFN TOPS20,<
CHKDDT: PUSH P,T1 ;[40] SAVE SOME TEMPS
PUSH P,T2 ;[40] ..
MOVX T1,<.FHSLF,,770> ;[40] SEE IF PAGE 770 EXISTS
RPACS% ;[41] ..
TXNN T2,PA%EX ;[40] ..
JRST CHKEND ;[40] NO--CAN'T BE STANDARD DDT
MOVE T1,770000 ;[40] SEE IF IT'S DDT THAT'S THERE
CAME T1,[JRST 770002] ;[40] CROCK, BUT THIS IS WHAT EXEC DOES
JRST CHKEND ;[40] NOT DDT
MOVE T1,.JBSYM## ;[40] IT'S DDT--STORE S.T. POINTER
MOVEM T1,@770001 ;[40] IN STANDARD PLACE
CHKEND: POP P,T2 ;[40] RESTORE TEMPS
POP P,T1 ;[40] ..
POPJ P, ;[40] DONE
> ;END IFN TOPS20
SUBTTL MESSAGE HANDLING -- Miscellaneous Messages
;THESE INFORMATIONAL MESSAGES REPORT THE PAGING ACTION OF THE OVERLAY HANDLER,
;AND GIVE THE USER SOME IDEA OF THE PERFORMANCE OF THE OVERLAYS. IN PARTICULAR,
;THE OVLRLL MESSAGE ALERTS THE USER TO THE POSSIBILITY THAT PLAYING WITH THE
;PROGRAM'S MEMORY MANAGEMENT OR WITH /SPACE IN LINK MIGHT PREVENT THE EXPENSIVE
;RELOCATION. ALL OF THESE MESSAGES (AND ONLY THESE) ARE UNDER CONTROL OF THE
;LOGOV. SUBROUTINE AND LINK'S /OVERLAY:LOG SWITCH.
IFN FTLOG,<
E$$RLN: PUSHJ P,INFO ;[100] PRINT [OVL PREFIX
POPJ P, ;[100] NO LOG FILE REQUESTED
TYPE <RLN Reading> ;[100]
LNKNO: PUSHJ P,PRNLNK ;PRINT NAME OR NUMBER
TYPE < after > ;[100]
PUSHJ P,PRNTIM ;[100] RUNTIME
PJRST INFOX ;[100] END THE LINE
E$$WLN: PUSHJ P,INFO ;[100] PRINT [OVL PREFIX
POPJ P, ;[100] NO LOG FILE REQUESTED
TYPE <WLN Writing> ;[100]
PJRST LNKNO ;[100] PRINT THE LINK NAME, ETC.
E$$DLN: PUSHJ P,INFO ;[100] PRINT [OVL PREFIX
POPJ P, ;[100] NO LOG FILE REQUESTED
TYPE <DLN Deleting>
PJRST LNKNO ;[100] PRINT THE LINK NAME, ETC.
IFN FTRELOC,<
E$$RLL: PUSHJ P,INFO ;[100] PRINT [OVL PREFIX
POPJ P, ;[100] NO LOG FILE REQUESTED
TYPE <RLL Relocating> ;[100]
PUSHJ P,PRNLNK
TYPE < at > ;[100]
MOVE T1,THSLNK
HRRZ T0,CS.ADR(T1) ;[100] PRINT ADDRESS IT'S RELOCATED TO
PUSHJ P,PRNOCT
PJRST INFOX ;[100] FINISH THE LINE AND RETURN
> ;END IFN FTRELOC
> ;END IFN FTLOG
E$$ARC: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <ARC Attempt to remove caller from> ;[100]
PUSHJ P,PRNLNK ;[100] PRINT THE OFFENDING LINK NAME
PUSHJ P,CRLF ;[100] END THE LINE
STOP
;E$$IMP IS USED FOR CASES THAT SHOULD NEVER (!) HAPPEN. IT SHOULD BE CALLED WITH
;A PUSHJ P,E$$IMP SO THE PC CAN BE PRINTED.
E$$IMP: PUSHJ P,FAIL ;[100]
TYPE <IMP 'Impossible' error condition at PC = >
MOVE T0,(P) ;[100] PRINT THE PC OF THE PUSHJ
SUBI T0,1 ;[100] ..
PUSHJ P,PRNOCT ;[100] ..
PUSHJ P,CRLF ;[100] END THE LINE
STOP
E$$ILN: PUSH P,T0 ;[100] SAVE THE BAD LINK NUMBER
PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <ILN Illegal link number > ;[100]
POP P,T0 ;[100] PRINT THE BAD LINK NUMBER
PUSHJ P,PRNDEC ;[100] ..
PUSHJ P,CRLF ;[100] END THE LINE
STOP
E$$IVN: SKIPE DI+DI.VER ;[100] IGNORE IF VERSION NUMBER WAS 0
PUSHJ P,WARN ;[100] PRINT %OVR PREFIX
POPJ P, ;[100] NO WARNINGS REQUESTED
TYPE <IVN Inconsistent version numbers> ;[100]
PJRST CRLF
E$$MEF: PUSHJ P,FAIL ;[100] PRINT ?OVL PREFIX
TYPE <MEF Memory expansion failed> ;[100]
PUSHJ P,PRNFRS ;[100] PRINT FUNCT. REASON FOR FAILURE
PUSHJ P,CRLF ;[100] FINISH THE LINE
STOP ;[100] DIE NOW
IFN FTRELOC!FTLOG<
E$$CGM: PUSHJ P,FAIL ;[100] PRINT ?OVL PREFIX
TYPE <CGM Cannot get memory from OTS>
PUSHJ P,PRNFRS ;INDICATE WHY
PUSHJ P,CRLF ;[100] END THE LINE
STOP
> ;END IFN FTRELOC!FTLOG
E$$STS: PUSHJ P,WARN ;[100] NO--PRINT %OVL PREFIX
JRST OVINI5 ;[100] NO WARNINGS REQUESTED
TYPE <STS OTS reserved space too small>
;**;[211] Change one line at E$$STS+3 HD 21-Nov-83
PJRST CRLF ;[211] FINISH THE LINE
E$$CDL: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <CDL Cannot delete> ;[100]
PUSHJ P,PRNLNK ;[100] PRINT LINK#
PUSHJ P,PRNFRS ;[100] INDICATE WHY
PUSHJ P,CRLF ;[100] END THE LINE
STOP ;[100] DIE NOW
E$$MAN: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <MAN Memory for absolute> ;[100]
PUSHJ P,PRNLNK
TYPE < not available> ;[100]
PUSHJ P,PRNFRS ;[100] SAY WHY
PUSHJ P,CRLF ;[100] END THE LINE
STOP
IFN FTRELOC,<
E$$NRS: PUSHJ P,FAIL ;[100] PRINT THE ?OVL PREFIX
TYPE <NRS No relocation table for symbols>
PUSHJ P,CRLF ;[100] END THE LINE
STOP ;[100] DIE NOW
> ;END IFN FTRELOC
SUBTTL MESSAGE HANDLING -- FAIL, WARN, INFO
;FAIL IS CALLED TO SET UP A FATAL MESSAGE. IT FORCES ALL OUTPUT TO THE USER'S
;TERMINAL, AND VERIFIES THAT THE LINE POSITION IS COLUMN 1.
FAIL: MOVEI T1,OUTTTY ;[100] FORCE TERMINAL OUTPUT
MOVEM T1,PRNCHR ;[100] ..
PUSHJ P,POSCHK ;[100] ARE WE IN COLUMN 1?
PUSHJ P,CRLF ;[100] NO--GET US THERE
TYPE <?OVL> ;[100] TYPE THE PREFIX
POPJ P, ;[100] DONE
;WARN IS CALLED TO SET UP A WARNING MESSAGE. IF THE USER REQUESTED WARNINGS, WE
;GIVE A SKIP RETURN WITH ALL OUTPUT FORCED TO THE TERMINAL AND THE LINE
;POSITIONED AT COLUMN 1.
WARN: SKIPE .OVRWA ;[100] USER REQUESTED WARNINGS?
POPJ P, ;[100] NO--GIVE NON-SKIP FOR NO WARNINGS
MOVEI T1,OUTTTY ;[100] YES--FORCE OUTPUT TO TERMINAL
MOVEM T1,PRNCHR ;[100] ..
PUSHJ P,POSCHK ;[100] ARE WE IN COLUMN 1?
PUSHJ P,CRLF ;[100] NO--GET US THERE
TYPE <%OVL> ;[100] TYPE THE PREFIX
CPOPJ1: AOS (P) ;[100] ALLOW WARNING TO PRINT
CPOPJ: POPJ P, ;[100] DONE
;INFO IS CALLED TO SET UP A WARNING MESSAGE. IF THE USER REQUESTED A LOG FILE,
;WE GIVE A SKIP RETURN INDICATING INFORMATIONAL MESSAGES, AND PRINT THE PREFIX
;BEGINNING IN COLUMN 1.
IFN FTLOG,<
INFO: SKIPN .OVRLO ;[100] ANY LOG FILE?
POPJ P, ;[100] NO--INDICATE NO MESSAGE THEN
MOVEI T1,OUTTTY ;[100] ASSUME LOG FILE IS TERMINAL
SKIPL .OVRLO ;[100] IS IT?
MOVEI T1,OUTLOG ;[100] NO--SET TO REAL LOG FILE OUTPUT
MOVEM T1,PRNCHR ;[100] ..
PUSHJ P,POSCHK ;[100] ARE WE IN COLUMN 1?
PUSHJ P,CRLF ;[100] NO--GET US THERE
TYPE <[OVL> ;[100] TYPE THE PREFIX
JRST CPOPJ1 ;[100] INDICATE LOG FILE TO BE USED
;INFOX COMPLETES THE INFORMATIONAL LINE BY TYPING THE CLOSING BRACKET AND CRLF.
INFOX: TYPE <]
> ;[100]
POPJ P, ;[100] DONE
> ;END IFN FTLOG
SUBTTL MESSAGE HANDLING -- .OVRLU - Undefined Subroutine Entry
'.OVRLU'
.OVRLU: EXP .+1 ;FOR @ IN JRST @(T1)
E$$USC: PUSHJ P,WARN ;[100] PRINT %OVL PREFIX
JRST OVRLUX ;[100] NO WARNINGS REQUESTED
TYPE <USC Undefined subroutine >
MOVE T1,(P) ;GET PC+1 OF CALLER
MOVEI T1,@-1(T1) ;ADDRESS OF EXTTAB
MOVE T1,ET.NAM(T1) ;GET SIXBIT NAME OF CALLED ROUTINE
PUSHJ P,PRNSBX
TYPE < called from PC = >
MOVE T1,(P) ;GET PC+1 BACK
MOVEI T0,-1(T1) ;BACKUP
PUSHJ P,PRNOCT
PUSHJ P,CRLF ;[100] FINISH THE LINE
OVRLUX: SETZB 0,1 ;RETURN 0
POPJ P, ;[100] DONE
CRLF: TYPE <
>
POPJ P, ;END LINE AND RETURN TO USER
SUBTTL MESSAGE HANDLING -- PRNFSP - Print A File Specification
;PRNFSP PRINTS A FILE SPECIFICATION ON TOPS-10. THE FILE SPECIFICATION IS
;CONTAINED IN THE FILOP. AND RELATED BLOCKS POINTED TO BY T1. SEE $FOFIL.
IFE TOPS20,<
PRNFSP: SPUSH <T2,T3> ;[100] SAVE SOME ACS
MOVS T2,T1 ;[100] PUT ADDRESS IN SAFE PLACE
MOVE T1,$FOFIL+.FODEV(T2) ;[100] PRINT THE DEVICE
PUSHJ P,PRNSBX ;[100] ..
TYPEC ":" ;[100] ..
MOVE T1,$FORIB+.RBNAM(T2) ;[100] PRINT THE FILE NAME
PUSHJ P,PRNSBX ;[100] ..
TYPEC "." ;[100] PRINT THE EXTENSION
HLLZ T1,$FORIB+.RBEXT(T2) ;[100] ..
PUSHJ P,PRNSBX ;[100] ..
SKIPN $FORIB+.RBPPN(T2) ;[100] ANY PATH TO PRINT?
JRST PRNFSX ;[100] NO--DONE
TYPEC "[" ;[100] START THE PATH SPECIFICATION
MOVE T1,$FORIB+.RBPPN(T2) ;[100] GET PPN BACK
TLNN T1,-1 ;[100] PATH BLOCK INSTEAD OF PPN?
JRST PRNFS1 ;[100] YES--GO PRINT IT
HLRZ T0,$FORIB+.RBPPN(T2) ;[100] NO--IT'S JUST THE PPN
PUSHJ P,PRNOCT ;[100] PRINT THE PPN
TYPEC "," ;[100] ..
HRRZ T0,$FORIB+.RBPPN(T2) ;[100] ..
PUSHJ P,PRNOCT ;[100] ..
JRST PRNFS3 ;[100] GO FINISH UP
;STILL IN IFE TOPS20
PRNFS1: HLRZ T0,$FOPTH+.PTPPN(T2) ;[100] PRINT THE PPN
PUSHJ P,PRNOCT ;[100] ..
TYPEC "," ;[100] ..
HRRZ T0,$FOPTH+.PTPPN(T2) ;[100] ..
PUSHJ P,PRNOCT ;[100] ..
MOVSI T3,-FTSFD ;[100] SET UP TO LOOP OVER SFD'S
PRNFS2: SKIPN $FOPTH+.PTSFD(T2) ;[100] ANY MORE SFD'S?
JRST PRNFS3 ;[100] NO--DONE
TYPEC "," ;[100] LEADING COMMA
MOVE T1,$FOPTH+.PTSFD(T2) ;[100] PRINT THE SFD NAME
PUSHJ P,PRNSBX ;[100] ..
AOBJN T3,PRNFS2 ;[100] LOOP OVER ENTIRE PATH
PRNFS3: TYPEC "]" ;[100] END THE PATH
PRNFSX: SPOP <T3,T2> ;[100] RESTORE THE ACS
POPJ P, ;[100] DONE
;STILL IN IFE TOPS20
;PRNLEE PRINTS THE LOOKUP/ENTER MESSAGE ASSOCIATED WITH AN ERROR CODE.
PRNLEE: TYPEC " " ;[100] PROVIDE SPACING FOR MESSAGE
HRRZS T1 ;[100] GET THE ERROR CODE
CAILE T1,LEELEN-1 ;[100] IF WE DON'T KNOW ABOUT IT
JRST PRNLE1 ;[100] THEN PRINT THE UNKNOWN MESSAGE
MOVE T1,LEETBL(T1) ;[100] ELSE PRINT THE KNOWN MESSAGE
PJRST PRNTXT ;[100] ..
PRNLE1: PUSH P,T1 ;[100] SAVE THE CODE
TYPEC "(" ;[100] PRINT THE CODE FOR REFERENCE
POP P,T0 ;[100] ..
PUSHJ P,PRNOCT ;[100] ..
TYPE <) Unknown error> ;[100]
POPJ P, ;[100] DONE
LEETBL: [ASCIZ \(0) File not found\]
[ASCIZ \(1) No such directory\]
[ASCIZ \(2) Protection failure or DECtape directory full\]
[ASCIZ \(3) File being modified\]
[ASCIZ \(4) File already exists\]
[ASCIZ \(5) Illegal sequence of monitor calls\]
[ASCIZ \(6) Directory data error\]
[ASCIZ \(7)\]; Not a saved file\]
[ASCIZ \(10)\]; Not enough memory\]
[ASCIZ \(11) Device not available\]
[ASCIZ \(12) No such device\]
[ASCIZ \(13) Illegal monitor call\]
[ASCIZ \(14) Quota exceeded or disk full\]
[ASCIZ \(15) Device is write-locked\]
[ASCIZ \(16) No monitor free memory\]
[ASCIZ \(17)\]; Partial allocation only\]
[ASCIZ \(20)\]; Block not free\]
[ASCIZ \(21) Cannot supersede existing directory\]
[ASCIZ \(22) Cannot delete existing directory\]
[ASCIZ \(23) Sub-directory not found\]
[ASCIZ \(24) Search list empty\]
[ASCIZ \(25) Sub-directory nesting exceeded\]
[ASCIZ \(26) No structure is writable\]
[ASCIZ \(27)\]; High segment not on swapping space\]
[ASCIZ \(30) File cannot be updated\]
[ASCIZ \(31)\]; Low segment overlaps high segment\]
[ASCIZ \(32)\]; Not logged in\]
[ASCIZ \(33)\]; Outstanding locks still set\]
[ASCIZ \(34)\]; Bad EXE file directory\]
[ASCIZ \(35)\]; Must have .EXE extension\]
[ASCIZ \(36)\]; EXE file directory too big\]
[ASCIZ \(37) Network capacity exceeded\]
[ASCIZ \(40) Task not available\]
[ASCIZ \(41) Unknown network node\]
[ASCIZ \(42) Sub-directory is in use\]
[ASCIZ \(43)\]; File has an NDR lock\]
[ASCIZ \(44) Job count too high\]
[ASCIZ \(45) Cannot rename sub-directory to a lower level\]
LEELEN==.-LEETBL ;[100]
> ;END IFE TOPS10
IFN TOPS20,<
;PRNFSP PRINTS THE FILE SPECIFICATION ASSOCIATED WITH A JFN. THE CALL IS:
;
; T1/ JFN OF THE FILE
PRNFSP: MOVE T2,T1 ;[100] PUT JFN IN CORRECT AC
HRROI T1,INBFR ;[100] NO LONGER NEED THAT BUFFER
SETZ T3, ;[100] PRINT DEFAULT FIELDS
JFNS% ;[100] ..
ERJMP CPOPJ ;[100] FORGET IT IF ERRORS HERE
MOVEI T1,INBFR ;[100] NOW PRINT THE STRING
PJRST PRNTXT ;[100] ..
;PRNJSE PRINTS THE MESSAGE ASSOCIATED WITH THE LAST PROCESS ERROR.
PRNJSE: TYPEC " " ;[100] SEPARATE THE TEXT
HRROI T1,INBFR ;[42] WHERE TO STORE STRING
HRLOI T2,.FHSLF ;[42] THIS FORK, LAST ERROR
SETZ T3, ;[42] ANY LENGTH
ERSTR% ;[41]
POPJ P, ;TOO BAD
POPJ P, ;...
MOVEI T1,INBFR ;[100] NOW PRINT THE STRING
PJRST PRNTXT ;[100] ..
> ;END IFN TOPS20
SUBTTL MESSAGE HANDLING -- PRNLNK, PRNSBX
;PRNLNK PRINTS THE CURRENT LINK'S NAME, OR ITS NUMBER IF IT DOES NOT HAVE A
;NAME. THE TEXT IS PRINTED ON THE USER'S TERMINAL OR THE LOG FILE. THE CALL IS:
;
; THSLNK/ CONTROL SECTION ADDRESS OF LINK TO PRINT
; PRNCHR/ ADDRESS OF CHARACTER OUTPUT ROUTINE
;
;USES T0 AND T1.
PRNLNK: TYPE < link > ;[100]
MOVE T1,THSLNK ;GET CONTROL SECTION ADDRESS
SKIPE CS.LNM(T1) ;DOES IT HAVE A NAME?
JRST PRNLNM ;YES
TYPE <number > ;[100]
MOVE T1,THSLNK ;GET CONTROL SECTION ADDRESS AGAIN
MOVE T0,CS.NUM(T1) ;LINK#
PJRST PRNDEC ;[100] GO PRINT THE LINK NUMBER
PRNLNM: TYPE <name > ;[100]
MOVE T1,THSLNK ;GET CONTROL SECTION ADDRESS AGAIN
MOVE T1,CS.LNM(T1) ;GET IT
; PJRST PRNSBX ;[100] PRINT THE NAME AND RETURN
;PRNSBX PRINTS A SIXBIT ITEM TO EITHER THE USER'S TERMINAL OR THE LOG FILE. THE
;CALL IS:
;
; T1/ SIXBIT WORD TO PRINT
; PRNCHR/ ADDRESS OF CHARACTER OUTPUT ROUTINE
;
;USES BOTH T0 AND T1
PRNSBX: JUMPE T1,CPOPJ ;[100] DONE IF NOTHING TO DO
PRNSB1: SETZ T0, ;[100] GET NEXT CHARACTER IN T0
LSHC T0,6 ;[100] ..
ADDI T0," "-' ' ;[100] CONVERT TO ASCII
PUSHJ P,@PRNCHR ;[100] AND OUTPUT IT
JUMPN T1,PRNSB1 ;IF MORE TO DO
POPJ P,
SUBTTL MESSAGE HANDLING -- PRNDEC, PRNOCT - Print Numbers
;PRNDEC PRINTS A DECIMAL NUMBER ON THE USER'S TERMINAL OR THE LOG FILE. THE CALL
;IS:
;
; T0/ NUMBER TO PRINT IN DECIMAL
; PRNCHR/ ADDRESS OF CHARACTER OUTPUT ROUTINE
;
;USES T0 AND T1.
PRNDEC: IDIVI T0,^D10
HRLM T1,(P) ;STORE ON STACK
SKIPE T0 ;DONE?
PUSHJ P,PRNDEC ;NOT YET
PRNDE1: HLRZ T0,(P) ;RECOVER
ADDI T0,"0"
PJRST @PRNCHR ;[100] PRINT THE CHARACTER
;PRNOCT PRINTS A OCTAL NUMBER ON THE USER'S TERMINAL OR THE LOG FILE. THE CALL
;IS:
;
; T0/ NUMBER TO PRINT IN OCTAL
; PRNCHR/ ADDRESS OF CHARACTER OUTPUT ROUTINE
;
;USES T0 AND T1.
PRNOCT: IDIVI T0,8
HRLM T1,(P) ;STORE ON STACK
SKIPE T0 ;DONE?
PUSHJ P,PRNOCT ;NOT YET
PJRST PRNDE1
SUBTTL MESSAGE HANDLING -- PRNTXT, PRNFRS
;PRNTXT PRINTS A TEXT STRING TO EITHER THE USER'S TERMINAL OR THE LOG FILE. THE
;CALL IS:
;
; T1/ ADDRESS OF ASCIZ STRING
; PRNCHR/ ADDRESS OF CHARACTER OUTPUT ROUTINE
;
;USES BOTH T0 AND T1.
PRNTXT: HRLI T1,(POINT 7,0) ;[100] BUILD THE BYTE POINTER
PRNTX1: ILDB T0,T1 ;[100] GET NEXT CHARACTER
JUMPE T0,CPOPJ ;[100] DONE WHEN WE GET A NULL
PUSHJ P,@PRNCHR ;[100] PRINT THE CHARACTER
JRST PRNTX1 ;[100] LOOP FOR ALL CHARACTERS
;PRNFRS PRINTS THE FUNCT. RETURN STATUS FOLLOWING A FAILING CALL TO FUNCT.. THE
;TEXT IS PRINTED ON THE USER'S TERMINAL OR THE LOG FILE. THE CALL IS:
;
; STATUS/ FUNCT. RETURN STATUS
; PRNCHR/ ADDRESS OF CHARACTER OUTPUT ROUTINE
;
;USES T0 AND T1.
PRNFRS: TYPE <, FUNCT. return status > ;[100] PRINT FUNCT.'S STATUS
MOVE T0,STATUS ;[100] ..
PJRST PRNOCT ;[100] ..
SUBTTL MESSAGE HANDLING -- PRNTIM - Print Runtime
IFN FTLOG,<
PRNTIM: SPUSH <T2,T3> ;[100] SAVE SOME ACCUMULATORS
IFE TOPS20,<
SETZ T0, ;THIS JOB
RUNTIM T0, ;RUNNING TIME IN MILLISECS
> ;END IFE TOPS20
IFN TOPS20,<
MOVX T1,.FHJOB ;[42] WHOLE JOB
RUNTM% ;[41]
MOVE T0,T1 ;[42]
IMULI T0,^D1000 ;* MILISECS
IDIVI T0,(T2) ;[42] AFTER SECONDS DIVIDER IS APPLIED
> ;END IFN TOPS20
SUB T0,ITIME
IDIV T0,[^D3600000] ;GET HOURS
MOVE T3,T1 ;SAVE REST
MOVEI T2," " ;FILL WITH SPACE
JUMPE T0,.+3 ;NO HOURS
PUSHJ P,PRNDC2 ;TYPE TWO DIGITS
PUSHJ P,PRNCLN ;TYPE COLON
MOVE T0,T3 ;RESTORE REST
IDIVI T0,^D60000 ;GET MINS
MOVE T3,T1 ;SAVE REST
JUMPE T0,.+3 ;NO MINS
PUSHJ P,PRNDC2 ;TYPE TWO DIGITS
PUSHJ P,PRNCLN ;TYPE COLON
MOVE T0,T3 ;RESTORE THE REST
IDIVI T0,^D1000 ;GET SECONDS
MOVE T3,T1 ;SAVE REM
PUSHJ P,PRNDC2 ;PRINT TWO DIGITS
MOVEI T0,"."
PUSHJ P,PRNCL0 ;SET NEW FILLER
MOVE T0,T3 ;GET MILLISECS
IDIVI T0,^D10
PUSHJ P,PRNDC2 ;TWO DIGITS IS ENOUGH
PJRST T3POPJ
PRNDC2: CAILE T0,^D9 ;SEE IF ONE DIGIT
PJRST PRNDEC ;NO--JUST OUTPUT
EXCH T0,T2 ;[100] SWAP DIGITS
PUSHJ P,@PRNCHR ;[100] PRINT FILL CHARACTER
EXCH T2,T0 ;[100] GET DIGIT BACK
ADDI T0,"0" ;[100] CONVERT TO A CHARACTER
PJRST @PRNCHR ;[100] PRINT IT
PRNCLN: MOVEI T0,":"
PRNCL0: MOVEI T2,"0" ;NEW FILLER
PJRST @PRNCHR ;[100] PRINT THE CHARACTER
> ;END IFN FTLOG
SUBTTL ERROR MESSAGES (TEXT)
COMMENT \
ARC Attempt to remove caller from [link]
ARL Ambiguous request in [link], using link number [decimal]
CCF Cannot close file [file], status [octal]
CDL Cannot delete [link], FUNCT. return status [octal]
CFF Cannot find file [file] [jserr]
CFF Cannot find file [file] [reason]
CGM Cannot get memory from OTS, FUNCT. return status [octal]
CRF Cannot read file [file] [jserr]
CSM Cannot shrink memory, FUNCT. return status [octal]
CUF Cannot update file [file] [reason]
CWF Cannot write file [file] [jserr]
CWF Cannot write file [file] [reason]
DLN Deleting [link] after [time]
IAT Illegal argument type on call to [symbol] from PC = [octal]
IEF Input error for file [file] [jserr]
IEF Input error for file [file], status [octal]
ILN Illegal link number [decimal]
IMP 'Impossible' error condition at PC = [octal]
IPE Input positioning error for file [file] [jserr]
IPE Input positioning error for file [file], status [octal]
IVN Inconsistent version numbers
LNM Link number [decimal] not in memory
MAN Memory not available for absolute [link], FUNCT. return status [octal]
MEF Memory expansion failed, FUNCT. return status [octal]
NMS Not enough memory to load symbols, FUNCT. return status [octal]
NRS No relocation table for symbols
NSA No start address for [link]
NSD No such device for [file]
OEF Output error for file [file] [jserr]
OEF Output error for file [file], status [octal]
OPE Output positioning error for file [file] [jserr]
OPE Output positioning error for file [file], status [octal]
OPP Overlay handler in private page
RLL Relocating [link] at [octal]
RLN Reading [link] after [time]
RMP RMAP% JSYS failed [jserr]
RPA RPACS% JSYS failed [jserr]
STS OTS reserved space too small
ULN Unknown link name [symbol]
USC Undefined subroutine [symbol] called from PC = [octal]
WLN Writing [link] after [time]
\
SUBTTL DATA AREAS
SEGMENT LOW
;THE FOLLOWING DATA DO NOT NEED TO BE ZEROED UPON OVRLAY INITIALIZATION.
.OVRWA::BLOCK 1 ;[100] -1 IF WARNINGS TYPED (SET BY LINK)
.OVRLO::BLOCK 1 ;[100] -1 IF LOG FILE ON TTY (SET BY LINK)
OVLNAM: ASCIZ /OVL/ ;[100] OVERLAY HANDLER'S MNEMONIC
PRNCHR: BLOCK 1 ;[100] OUTPUT ROUTINE--EITHER OUTTTY OR OUTLOG
DI: BLOCK DI.LEN ;[100] OVERLAY FILE DIRECTORY
PH: BLOCK PH.LEN ;[100] OVERLAY FILE PREAMBLE FOR EACH LINK
OVLSPC: BLOCK 1 ;[100] -1 MEANS USER SUPPLIED OVERLAY SPEC
%JBREL: BLOCK 1 ;[100] HOLD .JBREL **MUST** BE
%JBSA: BLOCK 1 ;[100] HOLD .JBSA CONSECUTIVE
SCRTCH: BLOCK 26 ;[106] SCRATCH AREA TO CONSTRUCT FILE SPEC
STRPTR: BLOCK 1 ;[100] POINTER TO OVERLAY FILE
IFE TOPS20,< ;[100] TOPS-10 ONLY NON-ZEROED DATA
JOBNUM: BLOCK 1 ;[100] SIXBIT JOB #,,BINARY JOB #
MYPPN: BLOCK 1 ;[100] LOGGED IN PPN
> ;END IFE TOPS20
IFN TOPS20,< ;[100] TOPS-20 ONLY NON-ZEROED DATA
TMPNAM: ASCIZ /OVERLAY.TMP;T/ ;[100] NAME OF THE TEMPORARY FILE
> ;END IFN TOPS20
IFN FTLOG,< ;[100] LOG FILE ONLY NON-ZEROED DATA
ITIME: BLOCK 1 ;RUN TIME AT START
> ;END IFN FTLOG
;THE FOLLOWING DATA MUST BE ZEROED UPON OVERLAY INITIALIZATION.
I.ZZ:! ;FIRST WORD TO ZERO
OW: BLOCK WR.LEN ;[100] WRITABLE LINK TABLE
INCIDX: BLOCK 1 ;LOWEST INDEX IN CORE
STATUS: BLOCK 1 ;STATUS ON RETURN FROM OTS
ADDCOR: BLOCK 1 ;ADDRESS OF CORE FOR OTS CALL **MUST** BE
SIZCOR: BLOCK 1 ;LENGTH OF CALL FOR OTS CALL CONSECUTIVE
UBLOCK: BLOCK 1 ;NEXT BLOCK FOR I/O
FSTLNK: BLOCK 1 ;POINTER TO CONTROL BLOCK OF FIRST LINK
CURLNK: BLOCK 1 ;POINTER TO CONTROL BLOCK OF LINK MAKING REQUEST
CURNUM: BLOCK 1 ;LINK # OF CURLNK
THSLNK: BLOCK 1 ;POINTER TO TEMP LINK
HILINK: BLOCK 1 ;HIGHEST LINK NUMBER
IFN TOPS20,<
OVRJFN: BLOCK 1 ;[100] JFN OF THE OVERLAY FILE
TMPJFN: BLOCK 1 ;[100] JFN OF THE TEMPORARY FILE
TEMP2: BLOCK 2 ;SAVE ACCS 2 & 3
> ;END IFN TOPS20
USERPC: BLOCK 1 ;[44] USER RETURN PC FOR MANUAL CALLS
OKOVLC: BLOCK 1 ;[43] -1 = OK TO OVERLAY CALLER (RUNOV.)
IDXBFR: BLOCK 200 ;200 WORD WINDOW OF LINK POINTERS
INBFR: BLOCK 200 ;200 WORD WINDOW OF FILE
I.END==.-1 ;LAST WORD TO ZERO
SEGMENT HIGH
PURGE %SEG%
SUBTTL THE END
END