NEW PREFIX AUTO 4,1 *--------------------------------------- * Global Symbol Record: (6+ bytes) * 0 : Len * 1 : Flags: * b7=0=pending,1=resolved * b6=R/W (.SE) * b2,b1,b0 : Size (in bytes) * 2-5 : 32 bits Value * 6+ : Local Symbols..... *--------------------------------------- * Local Symbol Record: (5 bytes) * 0 : Local ID (1->255) * 1-4 : 32 bits Value (PC) *--------------------------------------- SYM.Init >SYSCALL SListNew bcs .9 >STA.G SYM.hGlobalList >LDYAI 256 >SYSCALL getmem bcs .9 >STYA ZPNameBuf txa >STA.G SYM.hNameBuf >LDYAI 256 >SYSCALL getmem bcs .9 >STYA ZPGlobalBuf txa >STA.G SYM.hGlobalBuf >LDYAI 256 >SYSCALL getmem bcs .9 >STYA ZPLookupBuf txa >STA.G SYM.hLookupBuf .9 rts *--------------------------------------- SYM.Reset lda #0 sta (ZPGlobalBuf) rts *--------------------------------------- SYM.Quit >LDA.G SYM.hLookupBuf beq .1 >SYSCALL FreeMem .1 >LDA.G SYM.hNameBuf beq .2 >SYSCALL FreeMem .2 >LDA.G SYM.hGlobalBuf beq .3 >SYSCALL FreeMem .3 >LDA.G SYM.hGlobalList beq .8 >SYSCALL SListFree .8 clc rts *--------------------------------------- SYM.Dump stz ZPLinePtr stz ZPLinePtr+1 >LDA.G ASM.LI.ON bpl .1 >LDYA L.MSG.SYMBOLS >SYSCALL printf .1 >PUSHB.G SYM.hGlobalList >PUSHW ZPLinePtr >PUSHW ZPGlobalBuf >PUSHW ZPNameBuf >SYSCALL SListGetByID bcc .10 clc rts .10 stx ZPLinePtr Save Next ID sty ZPLinePtr+1 >LDA.G ASM.LI.ON bpl .1 ldy #SYMG.F Get Symbol Size lda (ZPGlobalBuf),y and #SYMG.F.SIZE tax beq .3 asl pha .2 iny lda (ZPGlobalBuf),y >PUSHA dex bne .2 plx .3 ldy L.MSG.EQU0,x lda L.MSG.EQU0+1,x >SYSCALL printf >PUSHW ZPNameBuf Label (PString) >LDYA L.MSG.PSTR >SYSCALL printf bcs .9 ldy #SYMG.SIZE .4 tya cmp (ZPGlobalBuf) beq .7 No Local Symbol iny lda (ZPGlobalBuf),y Get ID pha ldx #4 .5 iny lda (ZPGlobalBuf),y >PUSHA dex bne .5 pla >PUSHA phy >LDYA L.MSG.LSYMBOL >SYSCALL printf ply bne .4 .7 >LDYA L.MSG.CRLF >SYSCALL printf jmp .1 rts .8 clc .9 rts *--------------------------------------- SYM.NewOrGetGlobal >LDA.G ASM.PASS bne SYM.GetGlobal Pass #2: should be already defined... SYM.NewGlobal jsr SYM.LookupGlobal Pass #1; try to add global... bcc .9 Already Defined jsr SYM.GetName bcs .99 jsr SYM.PC2Global A=PC Size lda #SYMG.SIZE sta (ZPGlobalBuf) clc rts .9 lda #ERR.SYMBOL.REDEF sec .99 rts *--------------------------------------- SYM.GetGlobal >PUSHB.G SYM.hGlobalList >PUSHW ZPLinePtr >PUSHW ZPGlobalBuf >SYSCALL SListLookup bcs .9 adc ZPLinePtr sta ZPLinePtr bcc .1 inc ZPLinePtr+1 clc .1 tya >STA.G SYM.GlobalID+1 txa >STA.G SYM.GlobalID rts .9 lda #ERR.UNDEF.SYMBOL sec rts *--------------------------------------- SYM.LookupGlobal >PUSHB.G SYM.hGlobalList >PUSHW ZPLinePtr >PUSHW ZPLookupBuf >SYSCALL SListLookup bcs .9 adc ZPLinePtr sta ZPLinePtr bcc .8 inc ZPLinePtr+1 clc .8 .9 rts *--------------------------------------- SYM.FlushGlobal lda (ZPGlobalBuf) beq .8 >PUSHB.G SYM.hGlobalList >LDA.G ASM.PASS bne .2 >PUSHW ZPNameBuf >PUSHW ZPGlobalBuf >SYSCALL SListAdd bra .3 .2 >PUSHW.G SYM.GlobalID >PUSHW ZPGlobalBuf >SYSCALL SListUpdateByID .3 bcs .9 lda #0 sta (ZPGlobalBuf) rts .8 clc .9 rts *--------------------------------------- SYM.GetName jsr SRC.GetChar bcs .9 ldy #0 .1 jsr SRC.IsLetterOrDigit bcc .2 cmp #'.' beq .2 cmp #'_' bne .8 .2 sta (ZPNameBuf),y iny jsr SRC.GetNextChar bcc .1 .8 lda #0 sta (ZPNameBuf),y clc rts .9 lda #ERR.SYNTAX.ERROR sec rts *--------------------------------------- SYM.PC2Global ldx #4 ldy #ASM.PC .1 lda (pData),y pha iny dex bne .1 ldx #4 ldy #SYMG.V+3 .2 pla sta (ZPGlobalBuf),y dey dex bne .2 ldx #4 ldy #ASM.PC+3 .3 lda (ZPGlobalBuf),y bne .4 dex dey bne .3 .4 txa ldy #SYMG.F sta (ZPGlobalBuf),y txa A=PC Size rts *--------------------------------------- SYM.Acc2Global ldx #4 ldy #SYMG.F+4 .1 lda SRC.ACC.SIZE,x sta (ZPGlobalBuf),y dey dex bpl .1 clc rts *--------------------------------------- SYM.Lookup2Acc ldy #SYMG.F+4 ldx #4 .1 lda (ZPLookupBuf),y sta SRC.ACC.SIZE,x dey dex bne .1 lda (ZPLookupBuf),y and #SYMG.F.SIZE sta SRC.ACC.SIZE clc rts *--------------------------------------- * Local Symbol Record: (5 bytes) * 0 : Local ID (1->255) * 1-4 : 32 bits Value (PC) *--------------------------------------- SYM.NewOrGetLocalA tax Save ID lda (ZPGlobalBuf) not in a global label bne .1 lda #ERR.INV.LABEL clc rts .1 >LDA.G ASM.PASS bne SYM.LookupLocal.1 Pass #2: should be already defined... SYM.NewLocal jsr SYM.LookupLocal.1 Pass #1; try to add bcc .9 Already Defined lda (ZPGlobalBuf) tay clc adc #SYML.SIZE bcs .90 ldy #ASM.PC+4 .1 dey lda (pData),y pha cpy #ASM.PC bne .1 lda (ZPGlobalBuf) tay iny txa Get Back ID sta (ZPGlobalBuf),y ldx #4 .2 pla iny sta (ZPGlobalBuf),y dex bne .2 tya sta (ZPGlobalBuf) clc rts .90 lda #ERR.TOO.MANY.LOCAL * sec rts .9 lda #ERR.SYMBOL.REDEF sec rts *--------------------------------------- SYM.LookupLocal tax SYM.LookupLocal.1 ldy #SYMG.SIZE tya .1 cmp (ZPGlobalBuf) beq .9 CS if = txa iny cmp (ZPGlobalBuf),y beq .2 tya clc adc #SYML.SIZE-1 tay bcc .1 .9 lda #ERR.UNDEF.SYMBOL * sec rts .2 ldx #0 .3 iny lda (ZPGlobalBuf),y sta SRC.ACC,x inx cpx #4 bne .3 clc rts *--------------------------------------- * Private Symbol Record: (9 bytes) * 0 : Len (8) * 1 : Flags: * b7=0=pending,1=resolved * 2-5 : 32 bits Value (PC) * 6,7 : MCID (Macro Context ID) * 8 : Private ID (0->255) *--------------------------------------- SYM.AddPrivate clc rts *--------------------------------------- SYM.LookupPrivate clc rts *--------------------------------------- MAN SAVE /A2OSX.BUILD/BIN/DEV/ASM.S.SYM LOAD /A2OSX.BUILD/BIN/DEV/ASM.S ASM