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https://github.com/forth-ev/VolksForth.git
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307 lines
19 KiB
Forth
307 lines
19 KiB
Forth
\ *** Block No. 0 Hexblock 0
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\\ Tools 11Nov86
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Dieses File enthaelt die wichtigsten Werkzeuge zur Programm-
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entwicklung: - den einfachen Decompiler
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- der DUMP-Befehl
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- den Tracer
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Der einfache Decompiler wird benutzt, um neue Defining-Words
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zu ueberpruefen. Der automatische Decompiler kann ja dafuer
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nicht benutzt werden, da ihm diese Strukturen unbekannt sind.
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(Benutzung: addr und dann, je nach Art: S N D L C oder B)
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DUMP wird zum Ausgeben von Hexdumps benutzt. (from count DUMP)
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Der Tracer erlaubt Einzelschrittausfuehrung von Worten.
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Er ist unentbehrliches Hilfsmittel bei der Fehlersuche.
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(Benutzung: DEBUG <name> und END-TRACE)
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\ *** Block No. 1 Hexblock 1
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\ Programming-Tools word set / tracer cas 19july2020
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Onlyforth Vocabulary Tools Tools also definitions
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01 05 +thru &15 &16 +thru
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06 +load \ Tracer
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Onlyforth
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: internal \ start headerless definitions
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1 ?head ! ;
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: external \ end headerless definitions
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?head off ;
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\ *** Block No. 2 Hexblock 2
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\ Tools for decompiling 22feb86
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| : ?: dup 4 u.r ." :" ;
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| : @? dup @ 6 u.r ;
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| : c? dup c@ 3 .r ;
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: s ( adr - adr+ )
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?: space c? 3 spaces dup 1+ over c@ type dup c@ + 1+ even ;
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: n ( adr - adr+2 ) ?: @? 2 spaces dup @ >name .name 2+ ;
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: d ( adr n - adr+n)
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2dup swap ?: swap 0 DO c? 1+ LOOP 2 spaces -rot type ;
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\ *** Block No. 3 Hexblock 3
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\ Tools for decompiling 22feb86
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: l ( adr - adr+2 ) ?: 5 spaces @? 2+ ;
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: c ( adr - adr+1) 1 d ;
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: b ( adr - adr+1) ?: @? dup @ over + 5 u.r 2+ ;
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\\
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: dump ( adr n -) bounds ?DO cr I 10 d drop stop? IF LEAVE
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THEN 10 +LOOP ;
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\ *** Block No. 4 Hexblock 4
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\ General Dump Utility - Output UH 07Jun86
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| : .2 ( n -- ) 0 <# # # #> type space ;
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| : .6 ( d -- ) <# # # # # # # #> type ;
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| : d.2 ( addr len -- ) bounds ?DO I C@ .2 LOOP ;
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| : emit. ( char -- )
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$7F and dup bl $7E uwithin not IF drop Ascii . THEN emit ;
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| : dln ( addr --- )
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cr dup 6 u.r 2 spaces 8 2dup d.2 space
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over + 8 d.2 space $10 bounds ?DO I C@ EMIT. LOOP ;
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| : ?.n ( n1 n2 -- n1 )
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2dup = IF ." \/" drop ELSE 2 .r THEN space ;
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| : ?.a ( n1 n2 -- n1 )
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2dup = IF ." V" drop ELSE 1 .r THEN ;
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\ *** Block No. 5 Hexblock 5
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\ .head UH 03Jun86
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| : .head ( addr len -- addr' len' )
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swap dup -$10 and swap $0F and cr 8 spaces
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8 0 DO I ?.n LOOP space $10 8 DO I ?.n LOOP
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space $10 0 DO I ?.a LOOP rot + ;
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\ *** Block No. 6 Hexblock 6
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\ Dump and Fill Memory Utility UH 25Aug86
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Forth definitions
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: dump ( addr len -- )
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base push hex .head
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bounds ?DO I dln stop? IF LEAVE THEN $10 +LOOP ;
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Tools definitions
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: du ( addr -- addr+$40 ) dup $40 dump $40 + ;
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: dl ( line# -- ) c/l * scr @ block + c/l dump ;
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Forth definitions
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\ *** Block No. 7 Hexblock 7
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\ Trace Loadscreen 29Jun86
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Onlyforth \needs Tools Vocabulary Tools
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Tools also definitions
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1 8 +thru
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Onlyforth
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\ clear
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\ don't forget END-TRACE after using DEBUG
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\ *** Block No. 8 Hexblock 8
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\ Variables do-trace UH 04Nov86
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| Variable Wsave \ Variable for saving W
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| Variable <ip \ start of trace trap range
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| Variable ip> \ end of trace trap range
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| Variable 'ip \ holds IP (preincrement!)
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| Variable nest? \ True if NEST shall be performed
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| Variable newnext \ Address of new Next for tracing
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| Variable #spaces \ for indenting nested trace
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| Variable tracing \ true if trace mode active
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\ *** Block No. 9 Hexblock 9
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\ install Tracer UH 18Nov87
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Tools definitions
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| Code do-trace \ patch Next to new definition
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$C3 A mvi ( jmp ) >next sta
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newnext lhld >next 1+ shld Next
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end-code
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\ *** Block No. 10 Hexblock A
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\ throw status on Return-Stack 29Jun86
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| Create: npull
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rp@ count 2dup + even rp! r> swap cmove ;
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: npush ( addr len --) r> -rot over >r
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rp@ over 1+ - even dup rp! place npull >r >r ;
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| : oneline .status space query interpret -&82 allot
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rdrop ( delete quit from tracenext ) ;
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\ *** Block No. 11 Hexblock B
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\ reenter tracer 04Nov86
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| Code (step
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true H lxi tracing shld IP rpop Wsave lhld H W mvx
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Label fnext
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xchg
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M E mov H inx M D mov xchg pchl
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end-code
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| Create: nextstep (step ;
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| : (debug ( addr --) \ start tracing at addr
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dup <ip !
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BEGIN 1+ dup @ ['] unnest = UNTIL 2+ ip> ! ;
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\ *** Block No. 12 Hexblock C
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\ check trace conditions 04Nov86
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Label tracenext tracenext newnext !
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IP ldax IP inx A L mov IP ldax IP inx A H mov
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xchg tracing lhld H A mov L ora fnext jz
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nest? 1+ lda A ana
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0= ?[
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<IP lhld H inx
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IP A mov H cmp fnext jc
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0= ?[ IP' A mov L cmp fnext jc ]?
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IP> lhld
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H A mov IP cmp fnext jc
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0= ?[ L A mov IP' cmp fnext jc ]?
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][ A xra nest? 1+ sta ]? \ low byte still set
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\ one trace condition satisfied
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W H mvx Wsave shld false H lxi tracing shld
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\ *** Block No. 13 Hexblock D
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\ tracer display UH 25Jan88
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;c: nest? @
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IF nest? off r> ip> push <ip push dup 2- (debug
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#spaces push 1 #spaces +! >r THEN
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r@ nextstep >r input push output push standardi/o
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cr #spaces @ spaces
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dup 'ip ! 2- dup 5 u.r @ dup 6 u.r 2 spaces
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>name .name $1C col - 0 max spaces .s
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state push blk push >in push ['] 'quit >body push
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[ ' parser >body ] Literal push
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span push #tib push tib #tib @ npush r0 push
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rp@ r0 ! &82 allot ['] oneline Is 'quit quit ;
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\ *** Block No. 14 Hexblock E
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\ DEBUG with errorchecking 28Nov86
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| : traceable ( cfa -- cfa' )
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recursive dup @
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['] : @ case? ?exit
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['] key @ case? IF >body c@ Input @ + @ traceable exit THEN
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['] type @ case? IF >body c@ Output @ + @ traceable exit THEN
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['] r/w @ case? IF >body traceable exit THEN
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dup 1+ @ [ ' Forth @ 1+ @ ] Literal = IF nip 1+ exit THEN
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drop >name .name ." can't be DEBUGged" quit ;
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also Forth definitions
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: debug ( -- ) \ reads a word
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' traceable (debug Tools
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nest? off #spaces off tracing on do-trace ;
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\ *** Block No. 15 Hexblock F
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\ misc. words for tracing 28Nov86
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Tools definitions
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: nest \ trace next high-level word executed
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'ip @ 2- @ traceable drop nest? on ;
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: unnest \ ends tracing of actual word
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<ip on ip> off ; \ clears trap range
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: endloop \ stop tracing loop
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'ip @ <ip ! ; \ use when at end of loop
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Forth definitions
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: trace' ( -- ) \ reads a word
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context push debug <ip perform end-trace ;
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\ *** Block No. 16 Hexblock 10
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\ N>R NR> cr
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: N>R ( i * n +n -- ) ( R: -- j * x +n )
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\ Transfer N items and count to the return stack.
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DUP BEGIN DUP WHILE
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ROT R> SWAP >R >R
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1-
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REPEAT DROP R> SWAP >R >R ;
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: NR> ( -- i * x +n ) ( R: j * x +n -- )
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\ Pull N items and count off the return stack.
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R> R> SWAP >R DUP
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BEGIN DUP WHILE
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R> R> SWAP >R -ROT
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1-
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REPEAT DROP ;
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\ *** Block No. 17 Hexblock 11
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\ ?
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: ? ( a-addr -- )
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\ Display the value stored at a-addr.
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@ . ;
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