A2osX/SYS/KERNEL.S.PS.txt

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PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
*/--------------------------------------
* #ExecProcessNewEnvYA
* #ExecProcessYA (Blocking Parent PID)
* #CreateProcessNewEnvYA
* #CreateProcessYA (Non Blocking)
* ##In:
* Y,A = PTR To Cmd Line
* ##Out:
* A = Child PSID
*\--------------------------------------
K.ExecProcessNewEnvYA
ldx #S.PS.F.ENV+S.PS.F.HOLD
.HS 2C bit abs
K.ExecProcessYA ldx #S.PS.F.HOLD
.HS 2C bit abs
K.CreateProcessNewEnvYA
ldx #S.PS.F.ENV
.HS 2C bit abs
K.CreateProcessYA
ldx #0
stx K.CreateProcess.Flags
>STYA K.CreateProcess.CmdLine
jsr PS.CreateChild
bcs .9
sta K.CreateProcess.CPSID
jsr PS.Init
bcc .8
pha save error code
lda K.CreateProcess.CPSID
jsr PS.FreeA
pla get back error code
sec
rts
.8 lda K.CreateProcess.CPSID
.9 rts
*--------------------------------------
K.CreateProcess.Flags .BS 1
K.CreateProcess.CmdLine .BS 2
K.CreateProcess.CPSID .BS 1
*/--------------------------------------
* #GetPSByIDA
* ##In :
* A = PID
* ##Out :
* Y,A = PTR to TSKSLOT
*\--------------------------------------
K.GetPSByIDA sta K.GetPSByIDA.PS
>LDYAI TskMgr.Table
>STYA ZPQuickPtr1
lda K.GetPSByIDA.PS
beq .8
ldx #0
.1 inx
lda ZPQuickPtr1
clc
adc #S.PS
sta ZPQuickPtr1
bcc .2
inc ZPQuickPtr1+1
.2 lda (ZPQuickPtr1)
bpl .3
ldy #S.PS.PID
lda (ZPQuickPtr1),y
cmp K.GetPSByIDA.PS
beq .8
.3 cpx TSKMGR.SIZE
bne .1
.9 lda #TSKMGR.ERRNSP
sec
rts
.8 >LDYA ZPQuickPtr1
clc
rts
*--------------------------------------
K.GetPSByIDA.PS .BS 1
*/--------------------------------------
* #Sleep
* Make current process suspend until next RUN
* ##In :
* (none)
* ##Out :
* (none)
*\--------------------------------------
K.Sleep pla get PC LO
sec
sbc pCode
ldy #S.PS.PC
sta (pPs),y
pla get PC HI
sbc pCode+1
iny
sta (pPs),y
lda (pPs)
ora #S.PS.F.SLEEP
sta (pPs)
clc No error,
rts back to Kernel
*--------------------------------------
* PS.CreateChild
* in :
* out :
* A = PSID
* we cannot use ZPQuickPtrs1 & 2
* because of calling K.NewPStrYA & S.DupEnvA
*--------------------------------------
PS.CreateChild >LDYAI TskMgr.Table+S.PS
>STYA ZPQuickPtr3
ldx #0
.1 inx
cpx TSKMGR.SIZE
beq .2
lda (ZPQuickPtr3) Found an empty slot
bpl .3
lda ZPQuickPtr3
clc
adc #S.PS
sta ZPQuickPtr3
bcc .1
inc ZPQuickPtr3+1
bra .1
.2 cpx #K.PS.MAX
bne .3
lda #TSKMGR.ERROOH
sec
rts
.3 inc TSKMGR.SIZE
.4 inc TSKMGR.LASTID Get a PSID not alredy running
beq .4 not = 0
lda TSKMGR.LASTID
jsr K.GetPSByIDA
bcc .4
ldy #S.PS.PID
lda TSKMGR.LASTID
sta (ZPQuickPtr3),y
lda #0
ldy #S.PS.hCS
.5 sta (ZPQuickPtr3),y Blank Everything in this S.PS
iny
cpy #S.PS
bne .5
lda #S.PS.F.ENV
bit K.CreateProcess.Flags need to create ENV & Prefix ?
beq .6 no...
sta (ZPQuickPtr3) Mark this PS with ENV flag
ldy #S.PS.hPREFIX copy hPREFIX...
lda (pPs),y
jsr K.GetMemPtrA
jsr K.NewPStrYA
bcs .9
txa
ldy #S.PS.hPREFIX
sta (ZPQuickPtr3),y
ldy #S.PS.hENV ...and hENV from parent PS
lda (pPs),y
jsr PS.DupEnvA
bcs .9
ldy #S.PS.hENV
sta (ZPQuickPtr3),y
bra .8
.6 ldy #S.PS.hPREFIX reuse same hPREFIX...
lda (pPs),y
sta (ZPQuickPtr3),y
ldy #S.PS.hENV ...and hENV from parent PS
lda (pPs),y
sta (ZPQuickPtr3),y
.8 ldy #S.PS.hINDEV
.81 lda (pPs),y
sta (ZPQuickPtr3),y
iny
cpy #S.PS.hERRDEV+1
bne .81
ldy #S.PS.PID
lda (pPs),y
ldy #S.PS.PPID
sta (ZPQuickPtr3),y
ldy #S.PS.CPID
lda TSKMGR.LASTID
sta (pPs),y
lda #S.PS.F.HOLD
bit K.CreateProcess.Flags
beq .82
ora (pPs)
sta (pPs) HOLD parent PS if ExecProcess
.82 lda #S.PS.F.INUSE+S.PS.F.INIT
ora (ZPQuickPtr3)
sta (ZPQuickPtr3) Make this PS Init....
lda TSKMGR.LASTID
clc Exit with A=PSID
.9 rts
*--------------------------------------
PS.Init >LDYA K.CreateProcess.CmdLine
jsr K.PStr2StrArrayYA
bcs .9
phy save PTR to StrArray...
pha
txa
ldy #S.PS.hCMDLINE
sta (ZPQuickPtr3),y
pla Restore PTR...
ply
>SYSCALL LoadExeYA Y,A=filename full path
bcs .9
>STYA ZPQuickPtr4 save PTR to Code Segment
txa
ldy #S.PS.hCS
sta (ZPQuickPtr3),y save CS hMem in TSKSLOT
ldy #H.BIN.EXE.DS.SIZE+1
lda (ZPQuickPtr4),y Load DS.SIZE HI
tax
dey
ora (ZPQuickPtr4),y
beq .2 DS.SIZE=0...
lda (ZPQuickPtr4),y
>PUSHAX Push DS.SIZE
>PUSHBI S.MEM.F.INIT0 Clear DS
jsr K.GetMem
bcs .9
txa
ldy #S.PS.hDS
sta (ZPQuickPtr3),y save DS hMem in TSKSLOT
.2
clc
.9 rts
*--------------------------------------
* PS.FreeA
* In : A = PID to free
*--------------------------------------
PS.FreeA jsr K.GetPSByIDA
bcs *
>STYA ZPQuickPtr1
ldy #S.PS.hCMDLINE
lda (ZPQuickPtr1),y
beq .2
jsr K.FreeMemA
lda (ZPQuickPtr1) get S.PS.F
and #S.PS.F.ENV do we have to discard duplicated env & prefix ?
beq .4
.2 ldy #S.PS.hENV
lda (ZPQuickPtr1),y
beq .3
jsr K.FreeMemA
.3 ldy #S.PS.hPREFIX
lda (ZPQuickPtr1),y
beq .4
jsr K.FreeMemA
.4 ldy #S.PS.hDS
lda (ZPQuickPtr1),y
beq .5
jsr K.FreeMemA
.5 ldy #S.PS.hCS
lda (ZPQuickPtr1),y
beq .8
jsr K.FreeMemA
.8 lda #0
sta (ZPQuickPtr1) Mark TSKSLOT as free
clc
rts
*--------------------------------------
* PS.SelectA
* In : A=PSID
*--------------------------------------
PS.SelectA tay
bne PS.SelectN
PS.Select0
>LDYAI TskMgr.Table Make PS #0 as current process
>STYA pPs
bra PS.SelectDev
PS.SelectN jsr K.GetPSByIDA
bcs *
>STYA pPs
PS.Select ldy #S.PS.hCS
lda (pPs),y
jsr K.GetMemPtrA
>STYA pCode
ldy #S.PS.hDS
lda (pPs),y
beq PS.SelectDev
jsr K.GetMemPtrA
>STYA pData
PS.SelectDev ldy #S.PS.hOUTDEV
lda (pPs),y
beq .8
jsr K.GetDevByIDA
>STYA pDev
.8 clc
rts
*--------------------------------------
* PS.DupEnvA
* In:
* A = ENV hMem To Duplicate
* Out:
* A = hMem to new ENV
*--------------------------------------
PS.DupEnvA jsr K.GetMemPtrA
>STYA ZPQuickPtr1
>PUSHWI K.ENV.SIZE
>PUSHBI 0
jsr K.GetMem
bcs .9
>STYA ZPQuickPtr2
ldy #0
.1 lda (ZPQuickPtr1),y
sta (ZPQuickPtr2),y
beq .8
iny
bne .1
inc ZPQuickPtr1+1
inc ZPQuickPtr2+1
bra .1
.8 txa
clc
.9 rts
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.PS
LOAD SYS/KERNEL.S
ASM