NEW AUTO 3,1 */-------------------------------------- * # ExecL * ## C / CSH * `int execl(const char *cmdline, short int flags);` * ## ASM * `>PUSHW cmdline` * `>PUSHB flags` * `>SYSCALL execl` * ## RETURN VALUE * A = Child PSID *\-------------------------------------- K.ExecL >PULLB PS.Flags >LDYAI 256 jsr K.GetMem bcs .99 stx .90+1 >STYA PS.ArgV >PUSHYA jsr K.Arg2ArgV cmdline on stack, push buffer bcs .9 jsr PS.Exec .9 php pha .90 lda #$ff SELF MODIFIED jsr K.FreeMem pla plp .99 rts */-------------------------------------- * # ExecV * ## C / CSH * `int execv(const char* argv[], short int flags);` * ## ASM * `>PUSHW argv` * `>PUSHB flags` * `>SYSCALL execv` * ## RETURN VALUE * A = Child PSID *\-------------------------------------- K.ExecV >PULLB PS.Flags >PULLW PS.ArgV PS.Exec jsr PS.CreateChild A=PID,Child S.PS at PS.NewPSPtr,PS.Load.hMem bcs .9 sta .8+1 stz K.IOBuf If !=0 after PS.Load, it's a script jsr PS.Load bcs .90 jsr PS.AddArgV K.IOBuf= /.../SHELL, K.Buf256=/.../SCRIPT bcc .8 or K.IOBuf= 0, K.Buf256=/.../BINFILE .90 pha save error code >PUSHB .8+1 PID >PUSHBI 2 SIG jsr K.Kill pla get back error code sec rts .8 lda #$ff SELF MODIFIED * clc .9 rts */-------------------------------------- * # Fork * ## C * `short int fork();` * ## ASM * `>SYSCALL fork` * ## RETURN VALUE * A = Child PSID *\-------------------------------------- K.Fork jsr PS.CreateChild A=PID,Child S.PS at PS.NewPSPtr,PS.Load.hMem bcs .99 sta .8+1 ldy #S.PS.S lda #S.PS.S.RUN sta (PS.NewPSPtr),y ldy #S.PS.hCS lda (ZPPtr1),y sta (PS.NewPSPtr),y jsr MEM.GetMemByID jsr Mem.IncRefCnt ldy #S.MEM.PTR+1 lda (ZPMemMgrSPtr),y pha dey lda (ZPMemMgrSPtr),y ldy #S.PS.ZP.CODE+1 sta (PS.NewPSPtr),y dey pla sta (PS.NewPSPtr),y ldy #S.PS.hDS lda (ZPPtr1),y jsr MEM.Dup .99 bcs .9 ldy #S.PS.hDS sta (PS.NewPSPtr),y jsr K.GetMemPtr phy ldy #S.PS.ZP.DATA+1 sta (PS.NewPSPtr),y dey pla sta (PS.NewPSPtr),y ldy #S.PS.hSS lda (ZPPtr1),y jsr MEM.Dup bcs .9 ldy #S.PS.hSS sta (PS.NewPSPtr),y jsr K.GetMemPtr phy ldy #S.PS.ZP.STACK+1 sta (PS.NewPSPtr),y dey pla sta (PS.NewPSPtr),y ldy #S.PS.hARGV lda (ZPPtr1),y jsr MEM.Dup bcs .9 ldy #S.PS.hARGV sta (PS.NewPSPtr),y dey lda (ZPPtr1),y S.PS.ARGC sta (PS.NewPSPtr),y ldy #S.PS.ARGC sta (PS.NewPSPtr),y iny S.PS.hARGV txa sta (PS.NewPSPtr),y ldy #S.PS.A lda #0 sta (PS.NewPSPtr),y Forked PS will get A=PSID=0 iny .1 lda (ZPPtr1),y sta (PS.NewPSPtr),y iny cpy #S.PS.hSession bne .1 ldy #S.PS.ZP.LOCAL .2 lda (ZPPtr1),y sta (PS.NewPSPtr),y iny cpy #S.PS bne .2 .8 lda #$ff SELF MODIFIED * clc .9 rts *-------------------------------------- * PS.CreateChild * in : * out : * A = PSID *-------------------------------------- PS.CreateChild ldx #0 bra .2 Skip PS0 .1 lda PS.Table.PID,x beq .4 Found an empty slot .2 inx cpx CORE.PSCount bne .1 cpx #K.PS.MAX bne .3 lda #E.OOH sec rts .99 plx rts .3 inc CORE.PSCount .4 inc CORE.LastPSID Get a PSID not already running beq .4 not = 0 lda CORE.LastPSID jsr CORE.GetPS Y=PS Index, X,A unmodified bcc .4 running...loop lda CORE.LastPSID sta PS.Table.PID,x phx save PS Index >LDYAI S.PS jsr K.GetMem0 Blank Everything in this S.PS bcs .99 >STYA PS.NewPSPtr txa plx sta PS.Table.hPS,x jsr Mem.SetOwner Set Ownership lda PS.Flags and #S.PS.F.CLOSEONX sta (PS.NewPSPtr) lda CORE.LastPSID ldy #S.PS.PID sta (PS.NewPSPtr),y lda #S.PS.F.NOHUP bit PS.Flags beq .5 lda PS.Table.hPS Select PS0 jsr K.GetMemPtr bra .6 .5 >LDYA pPs .6 >STYA ZPPtr1 = Parent process ldy #S.PS.PID lda (ZPPtr1),y dey #S.PS.PPID sta (PS.NewPSPtr),y ldy #S.PS.hCWD copy hPREFIX... lda (ZPPtr1),y jsr K.GetMemPtr jsr K.StrDup bcs .9 jsr Mem.SetOwner Set Ownership txa ldy #S.PS.hCWD sta (PS.NewPSPtr),y ldy #S.PS.hENV lda (ZPPtr1),y jsr MEM.DupX dup hENV from parent PS bcs .9 ldy #S.PS.hENV sta (PS.NewPSPtr),y sta SETWRITEAUX jsr Mem.SetOwner Set Ownership sta CLRWRITEAUX ldy #S.PS.hStdIn .7 lda (ZPPtr1),y sta (PS.NewPSPtr),y iny cpy #S.PS.hStdErr+1 bne .7 ldy #S.PS.hSession lda (ZPPtr1),y sta (PS.NewPSPtr),y * tax * lda S.Table.hSID-1,x * jsr MEM.GetMemByID * jsr MEM.IncRefCnt lda #S.PS.F.HOLD bit PS.Flags beq .8 ora (ZPPtr1) sta (ZPPtr1) HOLD parent PS lda CORE.LastPSID ldy #S.PS.CPID sta (ZPPtr1),y .8 * lda #S.PS.S.INIT * ldy #S.PS.S * sta (PS.NewPSPtr),y Make this PS Init.... lda CORE.LastPSID Exit with A=PSID clc rts .9 pha >PUSHB CORE.LastPSID >PUSHBI 2 SIG jsr K.Kill pla sec rts *-------------------------------------- PS.Load ldy #$ff .1 iny lda (PS.ArgV),y beq .2 no / in path...try search in PATH cmp #'/' bne .1 >LDYA PS.ArgV found /, some path specified, no search jsr PS.STAT.YA bcc .6 REAL path in K.Buf256 .99 rts .2 >LDYA PS.ArgV jsr PS.Find.PATH Get fullpath in K.Buf256 bcc .6 >LDYA PS.ArgV jsr PS.Find.CWD bcs .99 .6 lda K.S.STAT+S.STAT.P.TYPE cmp #S.FI.T.BIN bne .7 jmp PS.LoadBIN .7 cmp #S.FI.T.TXT beq PS.Load.SCRIPT cmp #S.FI.T.SYS bne PS.Load.IPATH jsr PS.Buf2IO .SYSTEM -> IOBUF * ldy #$ff *.8 iny * inx * lda PS.T,y * sta K.IOBuf-1,x * bne .8 >LDYAI PS.SHUTDOWN jsr PS.Find.PATH bcs PS.RTS jmp PS.LoadBIN *-------------------------------------- PS.Load.IPATH lda #E.BADPATH .HS 2C PS.Load.IBIN lda #E.IBIN sec PS.RTS rts *-------------------------------------- PS.Load.SCRIPT jsr PS.Buf2IO jsr PS.LoadGetHeader bcs PS.RTS >PUSHWI PS.Load.ROOT >PUSHWI K.Buf256 K.Buf256 = "$ROOT" >SYSCALL2 GetEnv bcs PS.Load.IPATH ldx #$ff .1 inx lda K.Buf256,x bne .1 ldy #0 .3 lda K.IOBuf+128,y Check HEADER= "#!/" cmp PS.Load.HEADER,y bne PS.Load.IBIN iny cpy #3 bne .3 .4 iny inx lda K.IOBuf+128-1,y sta K.Buf256-1,x K.Buf256 = "${ROOT}BIN/SHELL" beq .5 eor #C.CR bne .4 sta K.Buf256-1,x K.Buf256 = "${ROOT}BIN/SHELL\0" .5 >LDYAI K.Buf256 jsr PS.STAT.YA bcs PS.RTS lda K.S.STAT+S.STAT.P.TYPE cmp #S.FI.T.BIN beq PS.LoadBIN jmp PS.Load.IBIN *-------------------------------------- PS.LoadBIN jsr BIN.Load K.Buf256= "${ROOT}BIN/SH\0", K.IOBuf=/.../SCRIPT bcs .9 >STYA ZPPtr4 save PTR to Code Segment phy ldy #S.PS.ZP.CODE+1 sta (PS.NewPSPtr),y save pCode HI... dey pla sta (PS.NewPSPtr),y save pCode LO... txa ldy #S.PS.hCS sta (PS.NewPSPtr),y save CS hMem in S.PS * jsr MEM.GetMemByID * jsr Mem.SetOwner Set Ownership ldy #H.BIN.F Get Bin S.PS.F lda (ZPPtr4),y beq .1 ldy #S.PS.F update PS S.PS.F ora (PS.NewPSPtr),y sta (PS.NewPSPtr),y .1 ldy #H.BIN.DS.SIZE+1 lda (ZPPtr4),y Load DS.SIZE HI tax dey ora (ZPPtr4),y beq .2 DS.SIZE=0... lda (ZPPtr4),y tay txa Y,A = DS.SIZE ldx #S.MEM.F.INIT0+S.MEM.F.DATA jsr MEM.GetMem.YAX bcs .9 phy ldy #S.PS.ZP.DATA+1 sta (PS.NewPSPtr),y save pData HI... dey pla sta (PS.NewPSPtr),y save pData LO... txa ldy #S.PS.hDS sta (PS.NewPSPtr),y save DS hMem in S.PS jsr Mem.SetOwner Set Ownership .2 ldy #H.BIN.SS.SIZE lda (ZPPtr4),y Load SS.SIZE tay beq .3 SS.SIZE.LO=0, set as default $100 lda #$ff SS.SIZE.HI .3 inc ldx #S.MEM.F.NOCROSS+S.MEM.F.STACK jsr MEM.GetMem.YAX bcs .9 phy save pStack base LO ldy #S.PS.ZP.STACK+1 sta (PS.NewPSPtr),y save pStack HI... ldy #S.PS.ZP.LOCAL+1 sta (PS.NewPSPtr),y save pLocal HI... pla make pStack = Base... ldy #H.BIN.SS.SIZE ...plus Stack size * clc adc (ZPPtr4),y ldy #S.PS.ZP.STACK sta (PS.NewPSPtr),y txa ldy #S.PS.hSS sta (PS.NewPSPtr),y save SS hMem in S.PS clc Potentially CS from ADC (ZPPtr4),y jmp Mem.SetOwner Set Ownership .9 rts *-------------------------------------- PS.LoadGetHeader >PUSHWI K.IOBuf >PUSHBI O.RDONLY >PUSHBI S.FI.T.TXT >PUSHWZ Aux type >SYSCALL2 fopen bcs .9 sta .1+1 >PUSHA >PUSHWI K.IOBuf+128 >PUSHWI 128 >SYSCALL2 fread php pha .1 lda #$FF SELF MODIFIED >SYSCALL2 fclose pla plp .9 rts *-------------------------------------- PS.Load.ROOT .AZ "ROOT" PS.Load.HEADER .AZ "#!/" *-------------------------------------- * K.Buf256= /.../SHELL, K.IOBuf=/.../SCRIPT * - or - * K.Buf256=/.../BINFILE,K.IOBuf=0 * Buf256+IOBUF(?)+PS.ArgV[1,...] -> #S.PS.hARGV *-------------------------------------- PS.AddArgV ldy #$ff In both cases, remove ARGV[0] .60 iny lda (PS.ArgV),y bne .60 tya sec adc PS.ArgV sta PS.ArgV bcc .70 inc PS.ArgV+1 Skip old ARGV[0] = scriptename .70 >LDYAI K.Buf256 jsr K.strlen >STYA PS.ArgSize lda K.IOBuf is there a /BIN/SHELL ? beq .10 >LDYAI K.IOBuf jsr K.strlen jsr PS.AddYAp12ArgSize .10 ldx #0 For now, 0 args... lda K.IOBuf beq .11 +1 for scriptpath inx .11 >LDYA PS.ArgV >STYA ZPPtr1 .1 lda (ZPPtr1) beq .4 inx ldy #0 .2 iny lda (ZPPtr1),y bne .2 * lda #0 jsr PS.AddYAp12ArgSize jsr SHARED.AddYp12P1 bra .1 .4 txa ldy #S.PS.ARGC sta (PS.NewPSPtr),y >LDYA PS.ArgSize Add 1 for ending 0 iny bne .5 inc .5 iny Add ONE MORE ?????!!!! bne .51 inc .51 jsr K.GetMem bcs .9 >STYA ZPPtr2 Target Buffer txa ldy #S.PS.hARGV sta (PS.NewPSPtr),y >LDYAI K.Buf256 jsr PS.AddYAToStrV lda K.IOBuf beq .6 >LDYAI K.IOBuf jsr PS.AddYAToStrV .6 >LDYA PS.ArgV >STYA ZPPtr1 .7 lda (ZPPtr1) sta (ZPPtr2) beq .8 Ending \0 jsr PS.AddPtr1ToStrV bra .7 .8 clc .9 rts *-------------------------------------- PS.AddYAToStrV >STYA ZPPtr1 PS.AddPtr1ToStrV ldy #$ff .2 iny lda (ZPPtr1),y sta (ZPPtr2),y bne .2 jsr SHARED.AddYp12P1 jmp SHARED.AddYp12P2 *-------------------------------------- PS.AddYAp12ArgSize pha tya sec +1 for \0 adc PS.ArgSize sta PS.ArgSize pla adc PS.ArgSize+1 sta PS.ArgSize+1 rts */-------------------------------------- * # Kill * ## C * `int kill(short int pid, short int sig);` * ## ASM * `>PUSHB pid` * `>PUSHB sig` * `>SYSCALL kill` * ## RETURN VALUE *\-------------------------------------- K.Kill.PID .BS 1 *-------------------------------------- K.Kill >PULLB .10+1 SIG >PULLA PID cmp #0 beq .9 CS sta K.Kill.PID jsr CORE.GetPSByID bcs .99 >STYA ZPPtr1 .10 lda #$ff SELF MODIFIED cmp #2+1 bcs .9 asl tax jmp (.1,x) .1 .DA K.Kill.0 .DA K.Kill.1 .DA K.Kill.2 .9 lda #E.SYN * sec .99 rts *-------------------------------------- K.Kill.1 lda (ZPPtr1) and #S.PS.F.SLEEP^$FF sta (ZPPtr1) ldy #S.PS.S lda #S.PS.S.QUIT sta (ZPPtr1),y K.Kill.0 clc rts K.Kill.2 ldy #S.PS.hSession lda (ZPPtr1),y tax * lda S.Table.hSID-1,x * jsr K.FreeMem ldy #S.PS.hENV lda (ZPPtr1),y >SYSCALL2 FreeStkObj ldx #4 .11 ldy .10,x lda (ZPPtr1),y beq .12 jsr K.FreeMem .12 dex bpl .11 lda (ZPPtr1) bit #S.PS.F.CLOSEONX beq .1 ldy #S.PS.hStdOut lda (ZPPtr1),y >SYSCALL2 fclose .1 lda K.Kill.PID ldx #0 .2 cmp PS.Table.PID,x beq .3 inx cpx CORE.PSCount bne .2 bra * .3 stz PS.Table.PID,x lda PS.TABLE.hPS,x stz PS.TABLE.hPS,x jmp K.FreeMem .10 .DA #S.PS.hSS,#S.PS.hDS,#S.PS.hCS .DA #S.PS.hARGV,#S.PS.hCWD */-------------------------------------- * # LoadTxtFile * Load TXT a file in memory (with ending 0) * ## C * `int loadtxtfile ( const char * filename );` * ## ASM * **In:** * `>LDYA filename` * `>SYSCALL loadtxtfile` * ## RETURN VALUE * Y,A = File Length (without ending 0) * X = hMem of Loaded File *\-------------------------------------- K.LoadTxtFile >PUSHYA >PUSHBI O.RDONLY >PUSHBI S.FI.T.TXT >PUSHWZ Aux type sec .HS 90 BCC */-------------------------------------- * # LoadFile * Load a file in memory * ## C * `int loadfile ( const char * filename, short int flags, short int ftype, int auxtype );` * ## ASM * **In:** * `>PUSHW filename` * `>PUSHB flags` * `>PUSHB ftype` * `>PUSHW auxtype` * `>SYSCALL loadfile` * ## RETURN VALUE * Y,A = File Length * X = hMem of Loaded File *\-------------------------------------- K.LoadFile clc ror PS.bTXT >SYSCALL2 FOpen bcs .99 sta PS.hFILE >PUSHA >PUSHWI K.S.Stat >SYSCALL2 FStat bcs .98 lda K.S.Stat+S.STAT.SIZE+3 ora K.S.Stat+S.STAT.SIZE+2 bne .97 >LDYA K.S.Stat+S.STAT.SIZE bit PS.bTXT Add 1 to buffer size for ending 0 bpl .1 iny bne .1 inc bne .1 .97 lda #E.FTB .98 pha lda PS.hFILE >SYSCALL2 FClose pla sec .99 rts *-------------------------------------- .1 jsr K.GetMem bcs .96 >STYA PS.MemPtr stx PS.hMem >PUSHB PS.hFILE >PUSHW PS.MemPtr >PUSHWI $ffff >SYSCALL2 fread bcs .96 sty .7+1 sta .8+1 bit PS.bTXT bpl .5 pha set ending 0 tya * clc adc PS.MemPtr sta .4+1 pla adc PS.MemPtr+1 sta .4+2 .4 stz $ffff Self Modified .5 jsr .98 FClose .7 ldy #$ff SELFMODIFIED .8 lda #$ff SELFMODIFIED ldx PS.hMem clc rts .96 pha jsr .98 FClose lda PS.hMem jsr K.FreeMem pla sec .9 rts */-------------------------------------- * # FileSearch * Search a file in the provided PATH list * And return, if found, the full path to it. * ## C * `int filesearch( char *filename, char *searchpath, char *fullpath, stat *filestat);` * ## ASM * **In:** * `>PUSHW filename` * `>PUSHW fullpath` * `>PUSHW searchpath` * `>PUSHW filestat` * `>SYSCALL filesearch` * ## RETURN VALUE * CC : success * DstBuf = FilePath * DstStat = S.STAT * CS : not found *\-------------------------------------- K.FileSearch >PULLW .4+1 DstStat >PULLW .2+1 DstBuf >PULLW PS.Find.2+1 path to search >PULLW PS.Find.4+1 filename to find stz PS.Find.98+1 jsr PS.Find bcs .9 ldx #$ff .1 inx lda K.Buf256,x .2 sta $ffff,x Self Modified bne .1 ldx #S.STAT-1 .3 lda K.S.STAT,x .4 sta $ffff,x Self Modified dex bpl .3 * clc .9 rts *-------------------------------------- PS.Find.CWD >STYA PS.Find.4+1 filename to find ldy #S.PS.hCWD lda (PS.NewPSPtr),y jsr K.GetMemPtr >STYA PS.Find.2+1 stz PS.Find.98+1 bra PS.Find PS.Find.LIB ldx #0 .HS 2C BIT ABS PS.Find.DRV ldx #2 .HS 2C BIT ABS PS.Find.PATH ldx #4 >STYA PS.Find.4+1 filename to find >PUSHW PS.VARS,x >PUSHWI 0 allocate... >SYSCALL2 GetEnv get value for Search Path bcs PS.Find.RTS >STYA PS.Find.2+1 stx PS.Find.98+1 PS.Find stz PS.Find.1+1 PS.Find.1 ldy #0 Self Modified Index in Search list string ldx #0 PS.Find.2 lda $ffff,y SELF MODIFIED beq PS.Find.3 end of string, try it.... iny cmp #':' beq PS.Find.3 sta K.Buf256,x inx bra PS.Find.2 PS.Find.3 txa beq PS.Find.98 String is empty....nothing to try sty PS.Find.1+1 save current index ldy #0 PS.Find.4 lda $ffff,y Self Modified, Append Filename... sta K.Buf256,x beq PS.Find.5 iny inx bra PS.Find.4 PS.Find.5 >LDYAI K.Buf256 jsr PS.STAT.YA bcs PS.Find.1 Failed...retry next path... lda K.S.STAT+S.STAT.MODE+1 cmp /S.STAT.MODE.DIR Dir ? beq PS.Find.1 jsr PS.Find.98 Discard Expanded hSrch list clc PS.Find.RTS rts PS.Find.98 lda #$ff SELF MODIFIED : Discard Search list beq .1 jsr K.FreeMem .1 lda #MLI.E.FNOTFND sec rts *-------------------------------------- PS.Buf2IO ldx #$ff .1 inx Save Script name in IOBuf lda K.Buf256,x sta K.IOBuf,x bne .1 rts *-------------------------------------- PS.STAT.YA >PUSHYA >PUSHWI K.S.STAT >SYSCALL2 Stat rts *-------------------------------------- PS.SHUTDOWN .AZ "shutdown" *PS.T .AZ " -T 3" PS.VARS .DA .1 .DA .2 .DA .3 .1 .AZ "LIB" .2 .AZ "DRV" .3 .AZ "PATH" */-------------------------------------- * # GetMemStat * **In:** * Y,A = Ptr to 24 bytes buffer * ## RETURN VALUE * Buffer filled with memory stats *\-------------------------------------- K.GetMemStat >STYA ZPPtr1 ldy #23 ldx #7 .1 lda DevMgr.Stat,x sta (ZPPtr1),y dey dex bpl .1 sta SETREADAUX jsr .2 sta CLRREADAUX .2 ldx #7 .3 lda Mem.Table,x sta (ZPPtr1),y dey dex bpl .3 clc rts *-------------------------------------- MAN SAVE usr/src/sys/kernel.s.ps LOAD usr/src/sys/kernel.s ASM