A2osX/SYS/KERNEL.S.BIN.txt

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NEW
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AUTO 3,1
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*--------------------------------------
.DUMMY
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.OR FAC 13 Bytes
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BIN.hMem .BS 1
BIN.R.CS.Start .BS 2
BIN.R.CS.End .BS 2
BIN.R.End .BS 2
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BIN.R.Size .BS 2
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BIN.R.Offset .BS 2
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BIN.R.Stop .BS 2
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.ED
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*--------------------------------------
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* LoadLib
* in :
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* Y,A = PTR To "LibName" C-String
* out :
* A = hMem To loaded LIB
*--------------------------------------
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K.LoadLib jsr ENV.Search.LIB
bcs .9
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jsr BIN.Load K.Buf256 = "/PATH/BIN"
bcs .9
>STYA .1+1
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txa Pass hLib to LibLoad
ldx #LIBMGR.LOAD
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.1 jsr $ffff SELF MODIFIED, Call LIB.LOAD function
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bcs BIN.Load.Cleanup
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lda BIN.hMem
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* clc
.9 rts
*--------------------------------------
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* UnloadLib
* in :
* A = hMem To Lib
* out :
*--------------------------------------
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K.UnloadLib pha
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jsr K.GetMemPtr
>STYA .2+1
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ldy #S.MEM.REFCNT
lda (ZPMemMgrSPtr),y
dec
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bne .8
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ldx #LIBMGR.UNLOAD
.2 jsr $ffff Self Modified, Call LIB.UNLOAD function
pla
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jmp K.FreeMem
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.8 sta (ZPMemMgrSPtr),y
pla
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* clc
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rts
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*/--------------------------------------
* # LoadDrv
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* ## ASM
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* **In:**
* Y,A = PTR to "NAME.DRV [PARAM]" C-String
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* ## RETURN VALUE
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* none
*\--------------------------------------
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K.LoadDrv >STYA .2+1 Save "BIN\0ARGS\0\0"
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jsr ENV.Search.DRV
bcs .9
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jsr BIN.Load K.Buf256 = "/PATH/BIN"
bcs .9
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>STYA .3+1
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ldx #$ff
.1 inx Skip "BIN"
.2 lda $ffff,x
bne .1
txa
sec
adc .2+1
tay
lda #0
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adc .2+2 Y,A = ARGS
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.3 jsr $ffff SELF MODIFIED, call Dev.Detect
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jsr BIN.Load.Cleanup
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bcs .9
lda #0 Make sure RC = 0 if success
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* clc
.9 rts
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BIN.Load.Cleanup
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php
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pha
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lda BIN.hMem
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jsr K.FreeMem
pla
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plp
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BIN.Load.Cleanup.RTS
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rts
*--------------------------------------
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* BIN.Load
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* in :
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* K.Buf256 = /BIN/PATH (CSTR)
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* out :
* Y,A = MEMPTR
* X = hMem of Code Segment
*--------------------------------------
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BIN.Load ldx #0
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.1 cpx Mem.LastSlot
beq BIN.Load.1
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inx we will skip Slot 0...
txa
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jsr MEM.GetMemByID
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lda (ZPMemMgrSPtr)
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bpl .1 In Use?
ldy #S.MEM.BIN any BIN PATH in this slot?
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lda (ZPMemMgrSPtr),y
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beq .1
jsr K.GetMemPtr X unmodified, get pathname
>STYA .3+1
ldy #0
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.2 lda K.Buf256,y
.3 cmp $ffff,y SELF MODIFIED
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bne .1
iny
ora #0
bne .2
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stx BIN.hMem save hMem
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txa
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jsr MEM.GetMemByID
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jsr Mem.IncRefCnt
clc
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jmp MEM.GetMEMPTR Y,A=Ptr
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*--------------------------------------
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* STAT Already called by Filesearch in FindDRV, FindLIB
* STAT Already called by PS.Load (TXT,BIN,SYS)
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*--------------------------------------
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BIN.Load.1 >LDYA K.S.STAT+S.STAT.P.AUXTYPE
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>STYA BIN.R.CS.Start
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>PUSHYA Push AUXTYPE
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>PUSHBI S.FI.T.BIN
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>PUSHBI O.RDONLY
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>LDYAI K.Buf256
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jsr K.LoadFile
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bcs BIN.Load.Cleanup.RTS Error Loading file
stx BIN.hMem save hMem
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pha YA=CODE+DATA size
tya
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* clc
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adc BIN.R.CS.Start Get AUXTYPE for actual Base Address
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sta BIN.R.End compute Range End=AUXTYPE+FILELEN
pla
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adc BIN.R.CS.Start+1
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sta BIN.R.End+1
txa
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jsr K.GetMemPtr
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>STYA ZPPtr1 set ZPPtr1 -> New Code start
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jsr BIN.ComputeOffsetYA YA = actual load address
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ldy #H.BIN.CS.SIZE get Code Len
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lda (ZPPtr1),y
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pha
iny
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lda (ZPPtr1),y
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ply
jsr BIN.ComputeCSEndYA
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jsr BIN.RelExe
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>LDYAI K.Buf256 get back bin path
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ldx #SYS.strdup make a copy of this string
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jsr K.SYSCALL2
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bcs .98
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lda BIN.hMem Keep X=new string hMem
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jsr MEM.GetMemByID X unmodified
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lda (ZPMemMgrSPtr)
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ora #S.MEM.F.CODE This is a code segment
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sta (ZPMemMgrSPtr)
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txa Get Back Cmd line hMem
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ldy #S.MEM.BIN
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sta (ZPMemMgrSPtr),y
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ldx BIN.hMem setup X = CS hMem
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clc
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jmp MEM.GetMEMPTR ...and Y,A=PTR to CS
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.98 jmp BIN.Load.Cleanup Discard Loaded Code, exits CS
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*/--------------------------------------
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* # InsDrv
* ## C
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* `void * insdrv (void * src, void * crvcsstart, void * drvcssize, void * drvend);`
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* ## ASM
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* **In:**
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* `>PUSHW DRV.END`
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* `>PUSHW DRV.CS.SIZE`
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* `>PUSHW DRV.CS.START`
* `>LDYA L.SRC`
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* `>SYSCALL insdrv`
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* ## RETURN VALUE
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* Y,A = Ptr to installed driver
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*\--------------------------------------
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K.InsDrv >STYA ZPPtr3 SRC PTR for move
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>PULLW BIN.R.CS.Start
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>PULLYA DRV.CS.SIZE
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jsr BIN.ComputeCSEndYA
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>PULLA BIN.R.End
sta BIN.R.End
sec
sbc BIN.R.CS.Start
tay
>PULLA
sta BIN.R.End+1
sbc BIN.R.CS.Start+1
>STYA BIN.R.Size
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jsr MEM.GetKrnlBuf Y,A = CODE + DATA
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bcs .9 No More Room to load Driver
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>STYA ZPPtr1 Y,A = DST Buf for RelDrv...
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>STYA ZPPtr4 ...for move...
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sty .7+1 ...and for exit
sta .8+1
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jsr BIN.ComputeOffsetYA
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lda BIN.R.Size
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eor #$ff
tax
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lda BIN.R.Size+1
eor #$ff
pha
ldy #0
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.1 inx
bne .2
pla
inc
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beq .3
pha
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.2 lda (ZPPtr3),y
sta (ZPPtr4),y
iny
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bne .1
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inc ZPPtr3+1
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inc ZPPtr4+1
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bra .1
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.3 jsr BIN.RelDrv Relocate at Ptr1
.7 ldy #$ff SELF MODIFIED
.8 lda #$ff SELF MODIFIED
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.9 rts
*--------------------------------------
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BIN.RelExe ldy #H.BIN.T+1
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lda (ZPPtr1),y
cmp /H.BIN.T.BIN65
beq .1
cmp /H.BIN.T.DRV65
beq .1
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lda #E.IBIN
sec
rts
.1 ldy #H.BIN.JMP relocate Main JMP
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jsr BIN.RelocateAtPtr1Y
ldy #H.BIN.EXE.REL.TABLE skip Header, CS.SIZE & DS.SIZE... (16 bytes)
.HS 2C bit abs
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*--------------------------------------
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BIN.RelDrv ldy #H.BIN.DRV.REL.TABLE
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.1 iny
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lda (ZPPtr1),y HI in A
beq .2 $00xx = end of table
dey
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jsr BIN.RelocateAtPtr1Y
iny
bra .1
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*--------------------------------------
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.2 jsr SHARED.AddYp1ToPtr1 add current offset in Y to Ptr
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* + 1 to skip last 00 from beq .2
* ZPPtr1=Current Code PTR
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lda BIN.R.CS.End
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clc
adc BIN.R.Offset
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sta BIN.R.Stop
lda BIN.R.CS.End+1
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adc BIN.R.Offset+1
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sta BIN.R.Stop+1
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.3 lda (ZPPtr1) get OPCODE
lsr /2
tax
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lda BIN.65816,x get OPCODE definition
bcs .4 go get LO nibble
lsr
lsr move HI -> LO
lsr
lsr
.4 and #$0f
bit #$8 abs addressing?
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beq .5 no....
and #7 save Opcode length...
pha
ldy #1
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jsr BIN.RelocateAtPtr1Y
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pla get back Opcode length...
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.5 tay A = OPCODE length
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jsr SHARED.AddYToPtr1
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.6 cmp BIN.R.Stop A = ZPPtr1
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bne .3
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lda ZPPtr1+1
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.7 cmp BIN.R.Stop+1
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bne .3 next opcode....
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clc Make sure exit with CC
rts
*-------------------------------------- YA = CS Size
BIN.ComputeCSEndYA
pha
tya
clc
adc BIN.R.CS.Start
sta BIN.R.CS.End ZPPtr1 + CodeLen
pla
adc BIN.R.CS.Start+1
sta BIN.R.CS.End+1
rts
*-------------------------------------- YA = Target Address
BIN.ComputeOffSetYA
pha
tya
sec
sbc BIN.R.CS.Start
sta BIN.R.Offset
pla
sbc BIN.R.CS.Start+1
sta BIN.R.Offset+1
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rts
*--------------------------------------
BIN.RelocateAtPtr1Y
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lda (ZPPtr1),y Get LO
tax save LO in X
iny make Y point to HI
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lda (ZPPtr1),y Get HI
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cpx BIN.R.CS.Start
sbc BIN.R.CS.Start+1
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bcc .9 addr < BIN.R.CS.Start, out of range
txa Get back LO
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cpx BIN.R.End
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lda (ZPPtr1),y Get HI
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sbc BIN.R.End+1
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bcs .9 addr > BIN.R.End, out of range
txa Get back LO
dey
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clc
adc BIN.R.Offset
sta (ZPPtr1),y
iny
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lda (ZPPtr1),y
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adc BIN.R.Offset+1
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sta (ZPPtr1),y
.9 rts
*--------------------------------------
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* 6502/65C02/65816 OPCODES
* Bit 3 : 1 = absolute addressing
* Bit 2-1-0 : opcode + @ length
*--------------------------------------
* 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F
BIN.65816
* TO DO : Make 2 different tables
* http://axis.llx.com/~nparker/a2/opcodes.html
*--------------------------------------
* 65R02 OPCODES
*--------------------------------------
* 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F
BIN.65R02 .HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS B.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
.HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
*--------------------------------------
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MAN
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SAVE USR/SRC/SYS/KERNEL.S.BIN
LOAD USR/SRC/SYS/KERNEL.S
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ASM