A2osX/SYS/KERNEL.S.PS.txt

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PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
*/--------------------------------------
* # ExecProcessNewEnv.YA
* # ExecProcess.YA (Blocking Parent PID)
* # CreateProcessNewEnv.YA
* # CreateProcess.YA (Non Blocking)
* ## In:
* Y,A = PTR To Cmd Line
* ## Out:
* A = Child PSID
*\--------------------------------------
K.ExecProcessNewEnv.YA
ldx #S.PS.F.ENV+S.PS.F.HOLD
.HS 2C bit abs
K.ExecProcess.YA
ldx #S.PS.F.HOLD
.HS 2C bit abs
K.CreateProcessNewEnv.YA
ldx #S.PS.F.ENV
.HS 2C bit abs
K.CreateProcess.YA
ldx #0
stx K.CreateProcess.Flags
>STYA K.CreateProcess.CmdLine
jsr PS.CreateChild Child S.PS at ZPPtr3
bcs .9
sta .8+1
>LDYA K.CreateProcess.CmdLine
jsr PS.CmdLine2Args Y,A = Args[0]
bcs .9
jsr PS.Init
bcc .8
pha save error code
lda .8+1
jsr CORE.PSFree.A
pla get back error code
sec
rts
.8 lda #$ff self modified
.9 rts
*--------------------------------------
K.CreateProcess.Flags .BS 1
K.CreateProcess.CmdLine .BS 2
*--------------------------------------
* PS.CreateChild
* in :
* out :
* A = PSID
* we cannot use ZPPtrs1 & 2
* because of calling K.NewStr.YA & S.DupEnv.A
*--------------------------------------
PS.CreateChild ldx #0
.1 cpx CORE.PSCount
beq .2
lda PS.Table.PID,x
beq .31 Found an empty slot
inx
bra .1
.2 cpx #K.PS.MAX
bne .3
lda #TSKMGR.ERROOH
sec
rts
.3 inc CORE.PSCount
.31 phx save PS inex
.4 inc CORE.LastPSID Get a PSID not alredy running
beq .4 not = 0
lda CORE.LastPSID
jsr CORE.GetPSByID.A
bcc .4
plx
lda CORE.LastPSID
sta PS.Table.PID,x
phx
>LDYAI S.PS
jsr K.GetMem0.YA Blank Everything in this S.PS
bcs .99
>STYA ZPPtr3
txa
plx
sta PS.Table.hMem,x
ldy #S.PS.PID
lda CORE.LastPSID
sta (ZPPtr3),y
lda #S.PS.F.ENV
bit K.CreateProcess.Flags need to create ENV & Prefix ?
beq .6 no...
sta (ZPPtr3) Mark this PS with ENV flag
ldy #S.PS.hPREFIX copy hPREFIX...
lda (pPs),y
jsr K.GetMemPtr.A
jsr K.NewStr.YA
bcs .9
txa
ldy #S.PS.hPREFIX
sta (ZPPtr3),y
ldy #S.PS.hENV ...and hENV from parent PS
lda (pPs),y
jsr PS.DupEnv.A
bcs .9
ldy #S.PS.hENV
sta (ZPPtr3),y
bra .8
.6 ldy #S.PS.hPREFIX reuse same hPREFIX...
lda (pPs),y
sta (ZPPtr3),y
ldy #S.PS.hENV ...and hENV from parent PS
lda (pPs),y
sta (ZPPtr3),y
.8 ldy #S.PS.hStdIn
.81 lda (pPs),y
sta (ZPPtr3),y
iny
cpy #S.PS.hStdErr+1
bne .81
ldy #S.PS.PID
lda (pPs),y
ldy #S.PS.PPID
sta (ZPPtr3),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 (ZPPtr3)
sta (ZPPtr3) Make this PS Init....
ldy #S.PS.CPID
lda CORE.LastPSID
sta (pPs),y
clc Exit with A=PSID
rts
.99 plx
.9 rts
*--------------------------------------
PS.CmdLine2Args >STYA ZPPtr1
ldy #0
.1 lda (ZPPtr1),y compute strlen in Y,X
beq .2
cmp #'"' skip " in computation....
beq .1
iny
bne .1 max 255
.2 tya +2 for ending 0 for last string, and endig 0 for array
clc
adc #2
tay
lda #0
bcc .3
inc
.3 jsr K.GetMem.YA
bcs .9
phy save PTR.LO
pha save PTR.HI
>STYA ZPPtr2
txa
ldy #S.PS.hARGS
sta (ZPPtr3),y
stz PS.CmdLine2Args.bInQuote
ldy #0
ldx #0 Arg Count
.4 lda (ZPPtr1),y
beq .8
cmp #'"' found a quote ?
bne .5
lda PS.CmdLine2Args.bInQuote
eor #$ff
sta PS.CmdLine2Args.bInQuote
bra .71
.5 cmp #' '
bne .70
bit PS.CmdLine2Args.bInQuote
bmi .70
inx Found one arg !!!
lda #0
.70 sta (ZPPtr2) yes, set this token len
.71 inc ZPPtr2
bne .72
inc ZPPtr2+1
.72 iny
bne .4
.8 lda #0
sta (ZPPtr2) set Array Ending 0
txa
ldy #S.PS.ARGC
sta (ZPPtr3),y
pla get back PTR.HI
ply get back PTR.LO
clc
.9 rts
PS.CmdLine2Args.bInQuote
.BS 1
*--------------------------------------
PS.Init jsr BIN.Load.YA Y,A=filename full path
bcs .9
>STYA ZPPtr4 save PTR to Code Segment
phy
ldy #S.PS.Context+1
sta (ZPPtr3),y save pCode HI...
dey
pla
sta (ZPPtr3),y save pCode LO...
txa
ldy #S.PS.hCS
sta (ZPPtr3),y save CS hMem in S.PS
ldy #H.BIN.EXE.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
jsr K.GetMem0.YA
bcs .9
phy
ldy #S.PS.Context+3
sta (ZPPtr3),y save pData HI...
dey
pla
sta (ZPPtr3),y save pData LO...
txa
ldy #S.PS.hDS
sta (ZPPtr3),y save DS hMem in S.PS
.2 ldy #H.BIN.EXE.SS.SIZE
lda (ZPPtr4),y Load SS.SIZE
ldy #S.PS.Context+4
sta (ZPPtr3),y save pStack LO...
tay
bne .3 SS.SIZE.LO=0, set as default $100
lda #1 SS.SIZE.HI
.HS 2C bit abs
.3 lda #0
>PUSHYA
>PUSHBI S.MEM.F.ALIGN
jsr K.GetMem
bcs .9
ldy #S.PS.Context+5
sta (ZPPtr3),y save pStack HI...(LO alredy set to Stack TOP)
txa
ldy #S.PS.hSS
sta (ZPPtr3),y save SS hMem in S.PS
clc
.9 rts
*--------------------------------------
* PS.DupEnv.A
* In:
* A = ENV hMem To Duplicate
* Out:
* A = hMem to new ENV
*--------------------------------------
PS.DupEnv.A jsr K.GetMemPtr.A
>STYA ZPPtr1
>LDYAI K.ENV.SIZE
jsr K.GetMem.YA
bcs .9
>STYA ZPPtr2
ldy #0
.1 lda (ZPPtr1),y
sta (ZPPtr2),y
beq .8
.2 iny
bne .3
inc ZPPtr1+1
inc ZPPtr2+1
.3 lda (ZPPtr1),y
sta (ZPPtr2),y
bne .2
iny
bne .1
inc ZPPtr1+1
inc ZPPtr2+1
bra .1
.8 txa
clc
.9 rts
*--------------------------------------
K.GetPSList.YA >STYA ZPPtr1
ldx #0
ldy #0
.1 lda PS.Table.PID,x
beq .2
lda PS.Table.hMem,x
iny
sta (ZPPtr1),y
.2 inx
cpx CORE.PSCount
bne .1
.9 tya
sta (ZPPtr1)
rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.PS
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM