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A2osX/SYS/KERNEL.S.PS.txt
Rémy GIBERT 0f9ebec8be Kernel 0.94+
2020-12-15 14:23:22 +01:00

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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 #$ff SELF MODIFIED
jsr K.FreeMem
pla
plp
.99 rts
*/--------------------------------------
* # ExecV
* ## C / CSH
* `int execv(const char* argv[], short int flags);`
* ## ASM
* `>PUSHW argv`
* `>PUSHB flags`
* `>SYSCALL execv`
* ## RETURN VALUE
* A = Child PSID
*\--------------------------------------
K.ExecV >PULLB PS.Flags
>PULLW PS.ArgV
PS.Exec jsr PS.CreateChild A=PID,Child S.PS at PS.NewPSPtr,PS.Load.hMem
bcs .9
sta .8+1
stz K.IOBuf If !=0 after PS.Load, it's a script
jsr PS.Load
bcs .90
jsr PS.AddArgV K.IOBuf= /.../SHELL, K.Buf256=/.../SCRIPT
bcc .8 or K.IOBuf= 0, K.Buf256=/.../BINFILE
.90 pha save error code
>PUSHBI 2
lda .8+1
jsr K.Kill
pla get back error code
sec
rts
.8 lda #$ff SELF MODIFIED
* clc
.9
PS.Exec.RTS 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 PS.Exec.RTS
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
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 #$ff SELF MODIFIED
* clc
.9 rts
*--------------------------------------
* PS.CreateChild
* in :
* out :
* A = PSID
*--------------------------------------
PS.CreateChild ldx #0
bra .2 Skip PS0
.1 lda PS.Table.PID,x
beq .4 Found an empty slot
.2 inx
cpx CORE.PSCount
bne .1
cpx #K.PS.MAX
bne .3
lda #E.OOH
sec
rts
.99 plx
rts
.3 inc CORE.PSCount
.4 inc CORE.LastPSID Get a PSID not already running
beq .4 not = 0
lda CORE.LastPSID
jsr CORE.GetPS Y=PS Index, X,A unmodified
bcc .4 running...loop
lda CORE.LastPSID
sta PS.Table.PID,x
phx save PS Index
>LDYAI S.PS
jsr K.GetMem0 Blank Everything in this S.PS
bcs .99
>STYA PS.NewPSPtr
txa
plx
sta PS.Table.hPS,x
jsr Mem.SetOwner Set Ownership
lda PS.Flags
and #S.PS.F.CLOSEONX
sta (PS.NewPSPtr)
lda CORE.LastPSID
ldy #S.PS.PID
sta (PS.NewPSPtr),y
lda #S.PS.F.NOHUP
bit PS.Flags
beq .5
lda PS.Table.hPS Select PS0
jsr K.GetMemPtr
bra .6
.5 >LDYA pPs
.6 >STYA ZPPtr1 = Parent process
ldy #S.PS.PID
lda (ZPPtr1),y
dey #S.PS.PPID
sta (PS.NewPSPtr),y
ldy #S.PS.hCWD copy hPREFIX...
lda (ZPPtr1),y
jsr K.GetMemPtr
jsr K.StrDup
bcs .9
jsr Mem.SetOwner Set Ownership
txa
ldy #S.PS.hCWD
sta (PS.NewPSPtr),y
ldy #S.PS.hENV
lda (ZPPtr1),y
jsr MEM.DupX dup hENV from parent PS
bcs .9
ldy #S.PS.hENV
sta (PS.NewPSPtr),y
sta SETWRITEAUX
jsr Mem.SetOwner Set Ownership
sta CLRWRITEAUX
ldy #S.PS.hStdIn
.7 lda (ZPPtr1),y
sta (PS.NewPSPtr),y
iny
cpy #S.PS.hStdErr+1
bne .7
ldy #S.PS.hSession
lda (ZPPtr1),y
sta (PS.NewPSPtr),y
* tax
* lda S.Table.hSID-1,x
* jsr MEM.GetMemByID
* jsr MEM.IncRefCnt
lda #S.PS.F.HOLD
bit PS.Flags
beq .8
ora (ZPPtr1)
sta (ZPPtr1) HOLD parent PS
lda CORE.LastPSID
ldy #S.PS.CPID
sta (ZPPtr1),y
.8
* lda #S.PS.S.INIT
* ldy #S.PS.S
* sta (PS.NewPSPtr),y Make this PS Init....
lda CORE.LastPSID Exit with A=PSID
clc
rts
.9 pha
>PUSHBI 2
lda CORE.LastPSID
jsr K.Kill
pla
sec
rts
*--------------------------------------
PS.Load ldy #$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 #$ff
*.8 iny
* inx
* lda PS.T,y
* sta K.IOBuf-1,x
* bne .8
>LDYAI PS.SHUTDOWN
jsr PS.Find.PATH
bcs PS.Load.RTS
jmp PS.LoadBIN
*--------------------------------------
PS.Load.IPATH lda #E.BADPATH
.HS 2C
PS.Load.IBIN lda #E.IBIN
sec
PS.Load.RTS rts
*--------------------------------------
PS.Load.SCRIPT jsr PS.Buf2IO
jsr PS.LoadGetHeader
bcs PS.Load.RTS
>PUSHWI PS.Load.ROOT
>PUSHWI K.Buf256 K.Buf256 = "$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 = "${ROOT}BIN/SHELL\0"
.5 >LDYAI K.Buf256
jsr PS.STAT.YA
bcs PS.Load.RTS
lda K.S.STAT+S.STAT.P.TYPE
cmp #S.FI.T.BIN
beq PS.LoadBIN
jmp PS.Load.IBIN
*--------------------------------------
PS.LoadBIN jsr BIN.Load K.Buf256= "${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
>PUSHWI 128
>PUSHWI K.IOBuf+128
.1 lda #$ff SELF MODIFIED
>SYSCALL2 fread
php
pha
lda .1+1
>SYSCALL2 fclose
pla
plp
.9 rts
*--------------------------------------
PS.Load.ROOT .AZ "ROOT"
PS.Load.HEADER .AZ "#!/"
*--------------------------------------
* K.Buf256= /.../SHELL, K.IOBuf=/.../SCRIPT
* - or -
* K.Buf256=/.../BINFILE,K.IOBuf=0
* Buf256+IOBUF(?)+PS.ArgV[1,...] -> #S.PS.hARGV
*--------------------------------------
PS.AddArgV ldy #$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.AddYp1ToPtr1
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 #$ff
.2 iny
lda (ZPPtr1),y
sta (ZPPtr2),y
bne .2
jsr SHARED.AddYp1ToPtr1
jmp SHARED.AddYp1ToPtr2
*--------------------------------------
PS.AddYAp12ArgSize
pha
tya
sec +1 for \0
adc PS.ArgSize
sta PS.ArgSize
pla
adc PS.ArgSize+1
sta PS.ArgSize+1
rts
*/--------------------------------------
* # Kill
* ## C
* `int kill(short int pid, short int sig);`
* ## ASM
* `>PUSHB sig`
* `lda pid`
* `>SYSCALL kill`
* ## RETURN VALUE
* A = Child PSID
*\--------------------------------------
K.Kill.PID .BS 1
*--------------------------------------
K.Kill cmp #0
beq .99 CS
sta K.Kill.PID
jsr CORE.GetPSByID
bcs .99
>STYA ZPPtr1
>PULLA
cmp #2+1
bcs .9
asl
tax
jmp (.1,x)
.1 .DA K.Kill.0
.DA K.Kill.1
.DA K.Kill.2
.9 lda #E.SYN
* sec
rts
.99 >RET 1
*--------------------------------------
K.Kill.1 lda (ZPPtr1)
and #S.PS.F.SLEEP^$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
>PUSHWI $ffff
>PUSHW PS.MemPtr
lda PS.hFILE
>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 #$ff SELFMODIFIED
ldx PS.hMem
clc
rts
.96 pha
jsr .98 FClose
lda PS.hMem
jsr K.FreeMem
pla
sec
.9 rts
*/--------------------------------------
* # FileSearch
* Search a file in the provided PATH list
* And return, if found, the full path to it.
* ## C
* `int filesearch( char *filename, char *searchpath, char *fullpath, stat *filestat);`
* ## ASM
* **In:**
* `>PUSHW filename`
* `>PUSHW fullpath`
* `>PUSHW searchpath`
* `>PUSHW filestat`
* `>SYSCALL filesearch`
* ## RETURN VALUE
* CC : success
* DstBuf = FilePath
* DstStat = S.STAT
* CS : not found
*\--------------------------------------
K.FileSearch >PULLW .4+1 DstStat
>PULLW .2+1 DstBuf
>PULLW PS.Find.2+1 path to search
>PULLW PS.Find.4+1 filename to find
stz PS.Find.98+1
jsr PS.Find
bcs K.FileSearch.RTS
ldx #$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
K.FileSearch.RTS
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 K.FileSearch.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 $ffff,y Self Modified, Append Filename...
sta K.Buf256,x
beq PS.Find.5
iny
inx
bra PS.Find.4
PS.Find.5 >LDYAI K.Buf256
jsr PS.STAT.YA
bcs PS.Find.1 Failed...retry next path...
lda K.S.STAT+S.STAT.P.TYPE
cmp #S.FI.T.DIR Dir ?
beq PS.Find.1
jsr PS.Find.98 Discard Expanded hSrch list
clc
rts
PS.Find.98 lda #$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
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