mirror of https://github.com/A2osX/A2osX.git
432 lines
9.3 KiB
Plaintext
432 lines
9.3 KiB
Plaintext
NEW
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AUTO 3,1
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*--------------------------------------
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* LoadLib
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* in :
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* Y,A = PTR To "LibName" C-String
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* out :
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* A = hMem To loaded LIB
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*--------------------------------------
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K.LoadLib jsr PS.Find.LIB
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bcs .9
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jsr BIN.Load K.Buf256 = "/PATH/BIN"
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bcs .9
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>STYA .1+1
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txa Pass hLib to LibLoad
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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
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.9 rts
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*--------------------------------------
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* UnloadLib
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* in :
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* A = hMem To Lib
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* out :
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*--------------------------------------
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K.UnloadLib pha
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jsr K.GetMemPtr
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>STYA .2+1
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ldy #S.MEM.REFCNT
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lda (ZPMemMgrSPtr),y
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dec
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bne .8
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ldx #LIBMGR.UNLOAD
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.2 jsr $ffff Self Modified, Call LIB.UNLOAD function
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pla
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jmp K.FreeMem
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.8 sta (ZPMemMgrSPtr),y
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pla
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* clc
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rts
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*/--------------------------------------
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* # LoadDrv
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* ## ASM
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* **In:**
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* Y,A = PTR to "NAME.DRV [PARAM]" C-String
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* ## RETURN VALUE
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* none
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*\--------------------------------------
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K.LoadDrv >STYA .2+1 Save "BIN\0ARGS\0\0"
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jsr PS.Find.DRV
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bcs .9
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jsr BIN.Load K.Buf256 = "/PATH/BIN"
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bcs .9
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>STYA .3+1
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ldx #$ff
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.1 inx Skip "BIN"
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.2 lda $ffff,x
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bne .1
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txa
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sec
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adc .2+1
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tay
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lda #0
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adc .2+2 Y,A = ARGS
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.3 jsr $ffff SELF MODIFIED, call Dev.Detect
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jsr BIN.Load.Cleanup
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bcs .9
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lda #0 Make sure RC = 0 if success
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* clc
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.9 rts
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BIN.Load.Cleanup
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php
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pha
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lda BIN.hMem
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jsr K.FreeMem
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pla
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plp
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BIN.Load.Cleanup.RTS
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rts
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*--------------------------------------
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* BIN.Load
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* in :
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* K.Buf256 = /BIN/PATH (CSTR)
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* out :
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* Y,A = MEMPTR
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* X = hMem of Code Segment
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*--------------------------------------
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BIN.Load lda A2osX.FSID
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bne .11
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ldx #$ff
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.10 inx
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lda K.Buf256,x
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beq .11
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cmp #'a'
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bcc .10
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cmp #'z'+1
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bcs .10
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eor #$20
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sta K.Buf256,x
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bra .10
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.11 ldx #0
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.1 cpx Mem.LastSlot
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beq BIN.Load.1
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inx we will skip Slot 0...
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txa
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jsr MEM.GetMemByID
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lda (ZPMemMgrSPtr)
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bpl .1 In Use?
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ldy #S.MEM.BIN any BIN PATH in this slot?
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lda (ZPMemMgrSPtr),y
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beq .1
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jsr K.GetMemPtr X unmodified, get pathname
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>STYA .3+1
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ldy #0
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.2 lda K.Buf256,y
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.3 cmp $ffff,y SELF MODIFIED
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bne .1
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iny
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ora #0
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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
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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
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* STAT Already called by PS.Load (TXT,BIN,SYS)
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*--------------------------------------
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BIN.Load.1 >PUSHWI K.Buf256
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>PUSHBI O.RDONLY
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>PUSHBI S.FI.T.BIN
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>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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jsr K.LoadFile
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bcs .9 Error Loading file
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stx BIN.hMem save hMem
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pha YA=CODE+DATA size
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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
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pla
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adc BIN.R.CS.Start+1
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sta BIN.R.End+1
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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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jsr Mem.SetOwnerPS0 this CS is owned by PS 0
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ldy #H.BIN.CS.SIZE get Code Len
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lda (ZPPtr1),y
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pha
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iny
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lda (ZPPtr1),y
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ply
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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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jsr K.strdup make a copy of this string
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bcs .98
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jsr Mem.SetOwnerPS0 Make BINPATH owned by PS0
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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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.9 rts
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*/--------------------------------------
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* # InsDrv
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* ## 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`
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* `>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
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sta BIN.R.End
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sec
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sbc BIN.R.CS.Start
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tay
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>PULLA
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sta BIN.R.End+1
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sbc BIN.R.CS.Start+1
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>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
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sta .8+1
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jsr BIN.ComputeOffsetYA
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lda BIN.R.Size
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eor #$ff
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tax
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lda BIN.R.Size+1
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eor #$ff
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pha
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ldy #0
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.1 inx
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bne .2
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pla
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inc
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beq .3
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pha
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.2 lda (ZPPtr3),y
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sta (ZPPtr4),y
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iny
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bne .1
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inc ZPPtr3+1
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inc ZPPtr4+1
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bra .1
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.3 jsr BIN.RelDrv Relocate at Ptr1
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.7 ldy #$ff SELF MODIFIED
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.8 lda #$ff SELF MODIFIED
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.9 rts
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*--------------------------------------
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BIN.RelExe ldy #H.BIN.T+1
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lda (ZPPtr1),y
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cmp /H.BIN.T.BIN65
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beq .1
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cmp /H.BIN.T.DRV65
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beq .1
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lda #E.IBIN
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sec
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rts
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.1 ldy #H.BIN.JMP relocate Main JMP
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jsr BIN.RelocateAtPtr1Y
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ldy #H.BIN.EXE.REL.TABLE skip Header, CS.SIZE & DS.SIZE... (16 bytes)
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.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
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beq .2 $00xx = end of table
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dey
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jsr BIN.RelocateAtPtr1Y
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iny
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bne .1
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inc ZPPtr1+1
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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
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* ZPPtr1=Current Code PTR
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lda BIN.R.CS.End
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clc
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adc BIN.R.Offset
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sta BIN.R.Stop
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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
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lsr /2
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tax
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lda BIN.65816,x get OPCODE definition
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bcs .4 go get LO nibble
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lsr
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lsr move HI -> LO
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lsr
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lsr
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.4 and #$0f
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bit #$8 abs addressing?
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beq .5 no....
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and #7 save Opcode length...
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pha
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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
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rts
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*-------------------------------------- YA = CS Size
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BIN.ComputeCSEndYA
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pha
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tya
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clc
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adc BIN.R.CS.Start
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sta BIN.R.CS.End ZPPtr1 + CodeLen
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pla
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adc BIN.R.CS.Start+1
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sta BIN.R.CS.End+1
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rts
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*-------------------------------------- YA = Target Address
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BIN.ComputeOffSetYA
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pha
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tya
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sec
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sbc BIN.R.CS.Start
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sta BIN.R.Offset
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pla
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sbc BIN.R.CS.Start+1
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sta BIN.R.Offset+1
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rts
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*--------------------------------------
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BIN.RelocateAtPtr1Y
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lda (ZPPtr1),y Get LO
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tax save LO in X
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iny make Y point to HI
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lda (ZPPtr1),y Get HI
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cpx BIN.R.CS.Start
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sbc BIN.R.CS.Start+1
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bcc .9 addr < BIN.R.CS.Start, out of range
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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
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txa Get back LO
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dey
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clc
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adc BIN.R.Offset
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sta (ZPPtr1),y
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iny
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lda (ZPPtr1),y
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adc BIN.R.Offset+1
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sta (ZPPtr1),y
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.9 rts
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*--------------------------------------
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* 6502/65C02/65816 OPCODES
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* Bit 3 : 1 = absolute addressing
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* Bit 2-1-0 : opcode + @ length
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*--------------------------------------
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* 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F
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BIN.65816
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* TO DO : Make 2 different tables
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* http://axis.llx.com/~nparker/a2/opcodes.html
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*--------------------------------------
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* 65R02 OPCODES
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*--------------------------------------
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* 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F
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BIN.65R02 .HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
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.HS B.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
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.HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
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.HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
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.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
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*--------------------------------------
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MAN
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SAVE usr/src/sys/kernel.s.bin
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LOAD usr/src/sys/kernel.s
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ASM
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