A2osX/SYS/KERNEL.S.PS.txt
2019-01-04 13:17:31 +00:00

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NEW
PREFIX
AUTO 4,1
*--------------------------------------
.DUMMY
.OR ZPTMP+21
PS.Flags .BS 1
PS.ArgV .BS 2
PS.ArgSize .BS 2
PS.hMem .BS 1
.ED
*/--------------------------------------
* # ExecL
* ## C
* `int execl(const char* cmdline, short int flags);`
* ## ASM
* `>PUSHB flags`
* `>LDYA cmdline`
* `>SYSCALL execl`
* ## RETURN VALUE
* A = Child PSID
*\--------------------------------------
K.ExecL sty .1+1
sta .2+1
>PULLB PS.Flags
>LDYAI 256
jsr K.GetMem
bcs .99
stx .90+1
>STYA PS.ArgV
>PUSHYA
.1 ldy #$ff SELF MODIFIED
.2 lda #$ff SELF MODIFIED
jsr K.Args2ArgV
bcs .9
jsr PS.Exec
.9 php
pha
.90 lda #$ff SELF MODIFIED
jsr K.FreeMem
pla
plp
.99 rts
*/--------------------------------------
* # ExecV
* ## C
* `int exec(const char* argv[], short int flags);`
* ## ASM
* `>PUSHB flags`
* `>LDYA argv`
* `>SYSCALL execv`
* ## RETURN VALUE
* A = Child PSID
*\--------------------------------------
K.ExecV >STYA PS.ArgV
>PULLB PS.Flags
PS.Exec jsr PS.CreateChild A=PID,Child S.PS at ZPPtr3,PS.Load.hMem
bcs .9
sta .8+1
stz K.IOBuf
jsr PS.Load
bcs .90
jsr PS.AddArgV
bcc .8
.90 pha save error code
.91 lda .8+1
jsr CORE.PSFree
pla get back error code
sec
rts
.8 lda #$ff SELF MODIFIED
.9 rts
*--------------------------------------
* PS.CreateChild
* in :
* out :
* A = PSID
* we cannot use ZPPtrs1 & 2
* because of calling K.StrDup & PS.DupEnv
*--------------------------------------
PS.CreateChild ldx CORE.PSCount
beq .3
ldx #0
.1 lda PS.Table.PID,x
beq .4 Found an empty slot
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 ZPPtr3
stx PS.hMem
txa
plx
sta PS.Table.hPS,x
jsr PS.SetMemOwner Set Ownership
ldy #S.PS.PID
lda CORE.LastPSID
sta (ZPPtr3),y
ldy #S.PS.hPREFIX copy hPREFIX...
lda (pPs),y
jsr K.GetMemPtr
>SYSCALL StrDup
bcs .9
jsr PS.SetMemOwner Set Ownership
txa
ldy #S.PS.hPREFIX
sta (ZPPtr3),y
lda #S.PS.F.DUPENV
bit PS.Flags need to create ENV ?
beq .6 no...
sta (ZPPtr3) Mark this PS with DUPENV flag
ldy #S.PS.hENV dup hENV from parent PS
lda (pPs),y
jsr PS.DupEnv
bcs .9
ldy #S.PS.hENV
bra .8
.6 ldy #S.PS.hENV reuse hENV from parent PS
lda (pPs),y
.8 sta (ZPPtr3),y
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 PS.Flags
beq .82
ora (pPs)
sta (pPs) HOLD parent PS
.82 lda #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
.9 rts
*--------------------------------------
PS.Load >PUSHWI K.S.STAT
>LDYA PS.ArgV
>SYSCALL stat BANK 1
bcs .99
lda K.S.STAT+S.STAT.P.TYPE
cmp #S.FI.T.BIN
beq PS.LoadBIN
cmp #S.FI.T.TXT
bne .98
* beq .10
* cmp #S.FI.T.SYS
* bra *
.10 jsr PS.LoadGetHeader
bcs .99
>LDYAI PS.Load.ROOT
jsr K.GetEnv ZPPtr3 Trashed
bcs .97
>STYA .21+1
ldx #$ff
.2 inx
.21 lda $ffff,x SELF MODIFIED
sta K.IOBuf,x
bne .2
ldy #0
.3 lda K.IOBuf+128,y
cmp PS.Load.HEADER,y
bne .98
iny
cpy #3
bne .3
.4 iny
inx
lda K.IOBuf+128-1,y
sta K.IOBuf-1,x
beq .5
eor #C.CR
bne .4
sta K.IOBuf-1,x
.5 >PUSHWI K.S.STAT
>LDYAI K.IOBuf
>SYSCALL stat BANK 1
bcs .99
lda PS.hMem Restore ZPPtr3 trashed by GetEnv
jsr K.GetMemPtr
>STYA ZPPtr3
>LDYAI K.IOBuf
bra PS.LoadBIN.YA
.97 lda #E.BADPATH
.HS 2C
.98 lda #E.IBIN
sec
.99 rts
PS.LoadBIN >LDYA PS.ArgV
PS.LoadBIN.YA jsr BIN.Load
bcs .9
>STYA ZPPtr4 save PTR to Code Segment
phy
ldy #S.PS.ZP.CODE+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
* jsr K.GetMemByID
* jsr PS.SetMemOwner 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 (ZPPtr3),y
sta (ZPPtr3),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 (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
jsr PS.SetMemOwner Set Ownership
.2 ldy #H.BIN.SS.SIZE
lda (ZPPtr4),y Load SS.SIZE
ldy #S.PS.ZP.STACK
sta (ZPPtr3),y save pStack LO...
tay
bne .3 SS.SIZE.LO=0, set as default $100
lda #1 SS.SIZE.HI
.HS 2C bit abs
.3 lda #0
ldx #S.MEM.F.ALIGN+S.MEM.F.STACK
jsr MEM.GetMem.YAX
bcs .9
ldy #S.PS.ZP.STACK+1
sta (ZPPtr3),y save pStack HI...(LO already set to Stack TOP)
txa
ldy #S.PS.hSS
sta (ZPPtr3),y save SS hMem in S.PS
jsr PS.SetMemOwner Set Ownership
ldy #H.BIN.ZP.SIZE
lda (ZPPtr4),y
clc
adc #8 Add room for 4 saved PTR
ldy #S.PS.ZP.SIZE
sta (ZPPtr3),y
clc
.9 rts
*--------------------------------------
PS.LoadGetHeader
>PUSHWI 0 Aux type
>PUSHBI S.FI.T.TXT
>PUSHBI O.RDONLY
>LDYA PS.ArgV
>SYSCALL fopen
bcs PS.LoadGetHeader.RTS
sta .1+1
>PUSHWI 128
>PUSHWI K.IOBuf+128
.1 lda #$ff SELF MODIFIED
>SYSCALL fread
php
pha
lda .1+1
>SYSCALL fclose
pla
plp
PS.LoadGetHeader.RTS
rts
*--------------------------------------
PS.Load.ROOT .AZ "ROOT"
PS.Load.HEADER .AZ "#!/"
*--------------------------------------
* PS.DupEnv
* In:
* A = ENV hMem To Duplicate
* Out:
* A = hMem to new ENV
* X = Count
*--------------------------------------
PS.DupEnv jsr K.GetMemPtr
>STYA ZPPtr1
>LDYAI K.ENV.SIZE
jsr K.GetMem
bcs .9
>STYA ZPPtr2 Target Buffer
phx save hMem
jsr PS.SetMemOwner Set Ownership
jsr PS.AddPtr1ToStrVUntil0
pla hMem
clc
.9 rts
*--------------------------------------
* hBIN + PS.ArgV -> #S.PS.hARGV
*--------------------------------------
PS.AddArgV stz PS.ArgSize
stz PS.ArgSize+1
lda K.IOBuf
beq .10
>LDYAI K.IOBuf
jsr K.strlen
iny +1 for \0
>STYA PS.ArgSize
ldx #0 ARGC-1
.HS 2C
.10 ldx #$ff ARGC-1
>LDYA PS.ArgV
>STYA ZPPtr1
.1 lda (ZPPtr1)
beq .4
inx
ldy #0
.2 iny
lda (ZPPtr1),y
bne .2
tya
sec
adc PS.ArgSize
sta PS.ArgSize
bcc .3
inc PS.ArgSize+1
.3 jsr MEM.AddYp1ToPtr1
bra .1
.4 txa
ldy #S.PS.ARGC
sta (ZPPtr3),y
>LDYA PS.ArgSize Add 1 for ending 0
iny
bne .5
inc
.5 jsr K.GetMem
bcs PS.AddPtr1ToStrV.8
>STYA ZPPtr2 Target Buffer
txa
ldy #S.PS.hARGV
sta (ZPPtr3),y
lda K.IOBuf
beq .6
>LDYAI K.IOBuf
>STYA ZPPtr1
jsr PS.AddPtr1ToStrV
.6 >LDYA PS.ArgV
>STYA ZPPtr1
*--------------------------------------
PS.AddPtr1ToStrVUntil0
.1 lda (ZPPtr1)
sta (ZPPtr2)
beq PS.AddPtr1ToStrV.8 Ending \0
jsr PS.AddPtr1ToStrV
bra .1
*--------------------------------------
PS.AddPtr1ToStrV
ldy #$ff
.2 iny
lda (ZPPtr1),y
sta (ZPPtr2),y
bne .2
jsr MEM.AddYp1ToPtr1
tya
sec
adc ZPPtr2
sta ZPPtr2
bcc PS.AddPtr1ToStrV.8
inc ZPPtr2+1
PS.AddPtr1ToStrV.8
rts
*--------------------------------------
PS.SetMemOwner lda CORE.LastPSID
ldy #S.MEM.OWNERPID
sta (ZPMEMMGR),y
rts
*/--------------------------------------
* # ExecL
* ## C
* `int kill(short int pid, short int sig);`
* ## ASM
* `>PUSHB sig`
* `lda pid`
* `>SYSCALL kill`
* ## RETURN VALUE
* A = Child PSID
*\--------------------------------------
K.Kill cmp #0
beq .99 CS
jsr CORE.GetPSByID
bcs .99
>STYA ZPPtr1
>PULLA
cmp #2
bcs .9
asl
tax
jmp (.1,x)
.1 .DA K.Kill.0
.DA K.Kill.1
.9 lda #E.SYN
* sec
rts
.99 >RET 1
*--------------------------------------
K.Kill.1 lda (ZPPtr1)
and #$33
ora #S.PS.F.QUIT
sta (ZPPtr1)
K.Kill.0
clc
rts
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.PS
LOAD USR/SRC/SYS/KERNEL.S
ASM