NEW AUTO 3,1 .LIST OFF *-------------------------------------- CORE.Init lda #PUSHD.STACK >STA.G PUSHD.STACK .9 rts *-------------------------------------- CORE.FUNCRESET >LDA.G hFuncList beq .8 >SYSCALL SListFree >STZ.G hFuncList .8 rts *-------------------------------------- * stack-6 InputBuf * stack-4 InputBufPtr * stack-3 old ARGC * stack-2 old ARGV * stack-1 new hCode * stack *-------------------------------------- CORE.Load.YAX stx M32.ACC X = Code to Execute >SYSCALL ArgVDup Y,A = ArgV bcs .9 stx M32.ACC+1 X = hARGV sta M32.ACC+2 A = ARGC lda #8 jsr CORE.StkCheck bcs .9 >LDYA ZPInputBuf jsr CORE.StkPushYA jsr CORE.StkPushInputBufPtr ldy #S.PS.ARGC lda (pPS),y jsr CORE.StkPush old ARGC ldy #S.PS.hARGV lda (pPS),y jsr CORE.StkPush old hARGV ldy #S.PS.ARGC lda M32.ACC+2 new ARGC dec Skip ARG0 in count sta (pPS),y iny #S.PS.hARGV lda M32.ACC+1 sta (pPS),y new hARGV lda M32.ACC new code jsr CORE.StkPush * lda M32.ACC >SYSCALL GetMemPtr >STYA ZPInputBuf >STYA ZPInputBufPtr * clc .9 rts *-------------------------------------- * http://heirloom.sourceforge.net/sh/sh.1.html *-------------------------------------- * CORE.Run * Input : ZPInputBufPtr (String) * Tokenize ZPArgVBuf * :LOOP * if CmdSep=| : * set hStdIn = hStdOut * set hStdOut = Std * GetCmd from line until | or EOL * if CmdSep=| : * create PIPE * set hStdOut -> PIPE * CORE.Exec & * :LOOP * else CORE.Exec *-------------------------------------- * SET VAR = `cmd args`, FOR VAR IN `cmd args` * create PIPE * set hStdOut -> PIPE * CORE.Exec `cmd args` & * set READMODE * set hStdIn = hStdOut * set hStdOut = Std *-------------------------------------- CORE.Run.EOF jsr CORE.StkPull bcs * cmp #$C0+C.. check CALL . CL context beq .1 cmp #$C0+C.CALL beq .1 cmp #$C0+C.CLEXEC bne .9 .1 jsr CMD.EXIT.FILE jsr IO.Reset lda #0 sec jmp CORE.Run.Exit Ending 0, CS,A=0 .9 lda #E.UNEXPEOF sec jmp CORE.Run.Exit CORE.Run.RTS rts *-------------------------------------- CORE.Run jsr IO.Reset >LDYAI 256 >SYSCALL GetMem bcs CORE.Run.RTS >STYA ZPArgVBuf txa >STA.G CORE.hArgVBuf clc .HS B0 BCS CORE.Run.1 sec coming from PIPE OUT ror >STA.G CORE.bPipeIn >LDYA ZPInputBufPtr Save Actual ptr for looping >STYA ZPInputCmdPtr >LDYA ZPArgVBuf Reset ArgV Buffer >STYA ZPArgVBufPtr lda #0 sta (ZPArgVBuf) sec ror CORE.IntCmd assume external lda #S.PS.F.HOLD sta CORE.PSFlags jsr CORE.GetCharNB bcs CORE.Run.EOF cmp #C.CR empty line ? bne .33 jsr CORE.GetNextChar skip CR... bra .8 .33 cmp #'#' commented line? bne .4 .12 jsr CORE.SkipLine .8 lda #0 clc .9 jmp CORE.Run.Exit EOL, CS,A=0 .4 >LDYA L.CMD internal command ? jsr CORE.LookupInputBuf bcc .41 .40 jsr CORE.ArgV.Add external cmd, go check context bra .42 .41 stx CORE.IntCmd asl CORE.IntCmd jsr CORE.SkipCharsA .42 jsr CORE.StkGet bcs CORE.Run.7 no particular context, exec... tax lda CORE.IntCmd bmi .45 and #$3F cmp #C.SWITCH SWITCH....FI ? bcs CORE.Run.7 .45 txa bpl .43 context is FALSE, skip line asl bmi CORE.Run.7 parent context is true, exec .43 jsr CORE.GetCharNB bcs .44 EOF cmp #C.CR beq .44 cmp #';' TODO ";" beq .44 jsr CORE.GetNextChar bra .43 .44 jsr CORE.GetNextCharNB Skip EoL char clc jmp CORE.Run.Exit *-------------------------------------- CORE.Run.5 >LDYA L.CORE.IO jsr CORE.LookupInputBuf bcs CORE.Run.6 jsr CORE.SkipCharsA jsr CORE.IO.JMP bcc CORE.Run.7 jmp CORE.Run.Exit CORE.Run.6 jsr CORE.ArgV.Add CORE.Run.7 jsr CORE.GetCharNB bcs .2 Nothing to skip jsr CORE.IsEndCmd bcs CORE.Run.5 tax jsr CORE.GetNextCharNB Skip EoL char cpx #'|' Pipe OUT ? bne .2 sec .1 .HS 90 BCC .2 clc ror >STA.G CORE.bPipeOut >LDA.G CORE.bPipeIn bpl .3 jsr IO.Pipe.In bcs CORE.Run.Exit .3 >LDA.G CORE.bPipeOut bpl .7 jsr IO.Pipe.Out bcs CORE.Run.Exit lda #S.PS.F.HOLD Run in the background... trb CORE.PSFlags lda #S.PS.F.CLOSEONX ...and close PIPE OUT on exit tsb CORE.PSFlags jsr CORE.ExecCmd php pha lda CORE.IntCmd $ff if external eor #$80 asl if cc Was external... jsr IO.Reset.OutC restore Output, NO close if EXTERNAL >LDA.G CORE.bPipeIn bpl .6 jsr IO.Pop.In restore Input .6 pla plp bcs CORE.Run.Exit jmp CORE.Run.1 Loop with Pipe IN .7 jsr CORE.ExecCmd *-------------------------------------- CORE.Run.Exit php pha >LDA.G CORE.hArgVBuf beq .1 >SYSCALL FreeMem >STZ.G CORE.hArgVBuf .1 pla plp rts *-------------------------------------- * Input : ZPArgVBuf *-------------------------------------- CORE.ExecCmd lda #0 sta (ZPArgVBufPtr) >LDYA ZPArgVBuf >STYA ZPArgVBufPtr ldx CORE.IntCmd bmi CORE.ExecExtCmd jmp (J.CMD,x) CORE.ExecExtCmd >PUSHW ZPArgVBuf >PUSHB CORE.PSFlags >SYSCALL ExecV bcs .9 tax CPID lda CORE.PSFlags and #S.PS.F.HOLD bne .4 >LDA.G CORE.bPipeOut bmi .4 ldy #S.PS.hStdErr lda (pPS),y >PUSHA >PUSHW L.MSG.PID txa >PUSHA >PUSHBI 1 >SYSCALL FPrintF rts .4 >SLEEP Suspend this PID sec ldy #S.PS.RC CPID will update S.PS.RC lda (pPS),y bne .9 .8 clc .9 rts *-------------------------------------- CORE.SkipLine jsr CORE.GetNextCharNB bcs .8 EOF cmp #C.CR EOL bne CORE.SkipLine jsr CORE.GetNextChar skip CR... .8 rts *-------------------------------------- * search ZPInputBufPtr/ZPArgVBufPtr in Y,A table *-------------------------------------- CORE.LookupInputBuf sec .HS 90 BCC CORE.LookupArgVBuf clc >STYA ZPPtr1 Keywords table >LDYA ZPArgVBufPtr bcc CORE.Lookup >LDYA ZPInputBufPtr CORE.Lookup >STYA ZPPtr2 ldx #0 .1 ldy #$ff .2 jsr .7 get next valid char in src text bcs .3 .20 jsr ToUpperCase eor (ZPPtr1),y match table char ? asl compare only 7 bits bne .4 no match...get next table keyword bcc .2 not last char in this keyword jsr .7 next char in text... bcc .4 valid....failed .8 tya Keyword Len clc rts .3 dey lda (ZPPtr1),y was last char in this keyword ? bmi .8 iny .41 jsr IncPtr1 skip chars to next keyword .4 lda (ZPPtr1) bpl .41 jsr IncPtr1 .6 inx lda (ZPPtr1) Array Ending 0, lookup failed bne .1 lda #E.SYN .9 sec rts .7 iny lda (ZPPtr2),y Get Src text char... beq .9 end of text jsr CORE.IsSpaceOrEndCmd bcc .9 end of valid chars clc CORE.ArgV.Add.RTS rts *-------------------------------------- * ArgV *-------------------------------------- CORE.ArgV.Add lda #C.SPACE sta ZPTmpW ldy #0 jsr CORE.GetCharNB bcs CORE.ArgV.Add.RTS cmp #'"' bne .10 sta ZPTmpW bra .1 .10 cmp #'(' bne .11 ldx #')' stx ZPTmpW bra .12 .11 cmp #'`' bne .12 sta ZPTmpW .12 sta (ZPArgVBufPtr),y iny .1 jsr CORE.GetNextChar bcs .7 .2 cmp ZPTmpW bne .3 jsr CORE.GetNextChar bra .7 .3 ldx ZPTmpW cpx #C.SPACE bne .6 jsr CORE.IsEndCmd bcc .7 .6 sta (ZPArgVBufPtr),y iny jsr CORE.GetNextChar bcc .2 .7 lda #0 sta (ZPArgVBufPtr),y >LDYA ZPArgVBufPtr >STYA ZPArgVBufPrev >PUSHYA >PUSHW ZPArgVBufPtr >SYSCALL Expand bcs .9 tya beq .8 Empty string.... sec adc ZPArgVBufPtr sta ZPArgVBufPtr bcc .8 inc ZPArgVBufPtr+1 clc .8 .9 rts *-------------------------------------- CORE.ArgV.Next lda (ZPArgVBufPtr) beq .8 >LDYA ZPArgVBufPtr >STYA ZPArgVBufPrev .1 jsr CORE.ArgV.NextChar lda (ZPArgVBufPtr) bne .1 jsr CORE.ArgV.NextChar lda (ZPArgVBufPtr) .8 rts *-------------------------------------- CORE.ArgV.NextChar inc ZPArgVBufPtr bne .8 inc ZPArgVBufPtr+1 .8 rts *-------------------------------------- * IO *-------------------------------------- CORE.IO.JMP txa asl tax jmp (J.CORE.IO,x) CORE.IO.AMP lda #S.PS.F.HOLD trb CORE.PSFlags clc CORE.IO.RTS rts CORE.IO.IN lda #O.RDONLY+O.TEXT jsr CORE.IO.Open bcs CORE.IO.RTS jmp IO.Set.In CORE.IO.OUTA CORE.IO.1OUTA lda #O.WRONLY+O.APPEND+O.CREATE+O.TEXT bra CORE.IO.OUT.1 CORE.IO.OUT CORE.IO.1OUT lda #O.WRONLY+O.TRUNC+O.CREATE+O.TEXT CORE.IO.OUT.1 jsr CORE.IO.Open bcs CORE.IO.RTS jmp IO.Set.Out CORE.IO.2OUTA lda #O.WRONLY+O.APPEND+O.CREATE+O.TEXT bra CORE.IO.2OUT.1 CORE.IO.2OUT lda #O.WRONLY+O.TRUNC+O.CREATE+O.TEXT CORE.IO.2OUT.1 jsr CORE.IO.Open bcs CORE.IO.RTS jmp IO.Set.Err *-------------------------------------- CORE.IO.Open pha Open Mode jsr CORE.GetCharNB bcs .9 no arg left.... jsr CORE.ArgV.Add Get Filename >LDYA ZPArgVBufPrev >STYA ZPArgVBufPtr Discard filename plx jmp IO.FOpenYAX .9 pla lda #E.SYN sec rts *-------------------------------------- * Input Buffer *-------------------------------------- CORE.IsSpaceOrEndCmd cmp #C.SPACE beq CORE.IsEndCmd.8 CORE.IsEndCmd cmp #';' beq CORE.IsEndCmd.8 cmp #C.CR beq CORE.IsEndCmd.8 cmp #'|' beq CORE.IsEndCmd.8 sec rts CORE.IsEndCmd.8 clc rts *-------------------------------------- CORE.GetCharNB jsr CORE.GetChar bcs CORE.GetNextCharNB.RTS jsr CORE.CheckCharNB bcc CORE.GetNextCharNB.RTS *-------------------------------------- CORE.GetNextCharNB jsr CORE.GetNextChar bcs CORE.GetNextCharNB.RTS jsr CORE.CheckCharNB bcs CORE.GetNextCharNB CORE.GetNextCharNB.RTS rts *-------------------------------------- CORE.CheckCharNB cmp #C.SPACE beq .9 cmp #C.LF beq .9 cmp #C.TAB beq .9 clc .9 rts *-------------------------------------- CORE.GetNextChar inc ZPInputBufPtr bne CORE.GetChar inc ZPInputBufPtr+1 *-------------------------------------- CORE.GetChar lda (ZPInputBufPtr) beq .9 clc rts .9 sec rts *-------------------------------------- CORE.SkipCharsA clc adc ZPInputBufPtr sta ZPInputBufPtr bcc .8 inc ZPInputBufPtr+1 .8 rts *-------------------------------------- * Stack *-------------------------------------- CORE.StkPopCtx jsr CORE.StkPull CORE.StkPopCtxA and #$3F cmp #C.IF beq .8 IF : Nothing ldx #2 cmp #C.WHILE WHILE : One Ptr = 2 bytes beq CORE.StkPopX cmp #C.SWITCH SWITCH : hValue beq .2 ldx #1 cmp #C.CASE CASE : C.CASE + hValue beq .1 cmp #C.FOR beq .3 cmp #C.DEFAULT DEFAULT : C.DEFAULT + hValue bne .9 .1 jsr CORE.StkPopX .2 jsr CORE.StkPullFree .8 clc rts .3 jsr CORE.StkPull Get FOR sub cmd beq .4 FOR List jsr CORE.StkPullFree hVARNAME jsr CORE.StkPullFClose hFILE/hPIPE ldx #2 CmdPtr jmp CORE.StkPopX .4 jsr CORE.StkPullFree hVARNAME jsr CORE.StkPullFClose hFILE/hPIPE ldx #4 ListPtr,CmdPtr jmp CORE.StkPopX .9 lda #E.STACKERROR sec rts *-------------------------------------- CORE.StkPopX lda (pData) .1 dec dex bne .1 sta (pData) clc rts *-------------------------------------- CORE.StkCheck sec adc (pData) StackPtr cmp #CORE.STACK.MAX bcc .8 lda #E.STKOVERFLOW * sec .8 rts *-------------------------------------- CORE.StkPushYAX phx jsr CORE.StkPushYA bcs CORE.StkPushYA.9 bra CORE.StkPush.1 *-------------------------------------- CORE.StkPushInputBufPtr >LDYA ZPInputBufPtr *-------------------------------------- CORE.StkPushYA phy jsr CORE.StkPush bcc CORE.StkPush.1 CORE.StkPushYA.9 plx CORE.StkPushYA.RTS rts *-------------------------------------- CORE.PushVarName >LDYA ZPVarNamePtr >SYSCALL StrDup bcs CORE.StkPushYA.RTS txa *-------------------------------------- CORE.StkPush pha CORE.StkPush.1 lda (pData) StackPtr inc cmp #CORE.STACK.MAX bcs .9 sta (pData) StackPtr tay pla sta (pData),y * clc rts .9 pla lda #E.STKOVERFLOW * sec rts *-------------------------------------- CORE.StkGetCtx jsr CORE.StkGet tax bcs .1 no context... cmp #$C0+C.. in a call... beq .1 CS cmp #$C0+C.CALL beq .1 CS cmp #$C0+C.CLEXEC beq .1 CS and #$80 get current.. lsr becomes parent bra .8 .1 lda #$40 ...set Parent = true .8 sta CORE.TestResult txa rts *-------------------------------------- CORE.StkPullInputBufPtr jsr CORE.StkPull bcs .9 sta ZPInputBufPtr jsr CORE.StkPull bcs .9 sta ZPInputBufPtr+1 .9 rts *-------------------------------------- CORE.StkPullFClose jsr CORE.StkPull >SYSCALL FClose rts *-------------------------------------- CORE.StkPullFree jsr CORE.StkPull >SYSCALL FreeMem rts *-------------------------------------- CORE.StkPull jsr CORE.StkGet bcs .9 dey pha tya sta (pData) StackPtr pla .9 rts *-------------------------------------- CORE.StkGet lda (pData) StackPtr beq .9 tay lda (pData),y clc rts .9 lda #E.STACKERROR sec rts *-------------------------------------- MAN SAVE usr/src/bin/sh.s.core LOAD usr/src/bin/sh.s ASM