mirror of
https://github.com/A2osX/A2osX.git
synced 2024-06-01 07:41:51 +00:00
428 lines
9.8 KiB
Plaintext
428 lines
9.8 KiB
Plaintext
PR#3
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PREFIX /A2OSX.SRC
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NEW
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INC 1
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AUTO 6
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.LIST OFF
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*--------------------------------------
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* BIN.LoadExeYA
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* in :
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* A = hMem of FilePath (PSTR)
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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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K.LoadEXEYA >STYA K.LoadEXEYA.Filename
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>SYSCALL PStrUprYA Y,A unmodified
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jsr MEM.GetMemByNameYA
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bcs K.LoadEXEYA.1 not already loaded
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>STYA ZPQuickPtr1 Save base address
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ldy #S.MEM.REFCNT
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lda (ZPQuickPtr1),y
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inc
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sta (ZPQuickPtr1),y
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txa
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jmp K.GetMemPtrA X=hMem from K.GetMemByNameA
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*--------------------------------------
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K.LoadEXEYA.1 >PUSHWI KrnBuf256
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>PUSHW K.LoadEXEYA.Filename
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jsr K.STAT Look for AUXTYPE
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bcs .9
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>LDYA KrnBuf256+S.STAT.P.AUXTYPE
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>STYA BIN.Relocate.Start
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>PUSHYA Push AUXTYPE
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>PUSHBI 6 S.FILEINFO.TYPE.BIN
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>PUSHBI SYS.FOPEN.R
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>PUSHW K.LoadEXEYA.Filename
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jsr K.LoadFile
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.9 bcs .99 Error Loading file
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stx K.LoadEXEYA.hMem save hMem
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pha YA=CODE+DATA size
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tya
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* clc CC from bcs .99
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adc BIN.Relocate.Start Get AUXTYPE for actual Base Address
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sta BIN.Relocate.End compute Range End=AUXTYPE+FILELEN
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pla
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adc BIN.Relocate.Start+1
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sta BIN.Relocate.End+1
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txa
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jsr K.GetMemPtrA
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>STYA ZPQuickPtr1 set ZPQuickPtr1 -> Code start
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pha YA = actual load address
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tya
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sec
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sbc BIN.Relocate.Start
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sta BIN.Relocate.Offset Offset=ZPQuickPtr1-AUXTYPE
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pla
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sbc BIN.Relocate.Start+1
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sta BIN.Relocate.Offset+1
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ldy #H.BIN.CODE.LEN get Code Len
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lda (ZPQuickPtr1),y
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clc
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adc ZPQuickPtr1
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sta ZPQuickPtr2 Make ZPQuickPtr2 = ZPQuickPtr1 + CodeLen
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iny
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lda (ZPQuickPtr1),y
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adc ZPQuickPtr1+1
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sta ZPQuickPtr2+1
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jsr BIN.RelocateEXE
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>LDYA K.LoadEXEYA.Filename get back bin path
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>SYSCALL NewPStrYA make a copy of this string
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bcs .98
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lda K.LoadEXEYA.hMem Keep X=hMem
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jsr K.GetMemByIDA X unmodified
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>STYA ZPQuickPtr1
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lda (ZPQuickPtr1)
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ora #S.MEM.F.CODE This is a code segment
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sta (ZPQuickPtr1)
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txa Get Back hMem
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ldy #S.MEM.BIN
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sta (ZPQuickPtr1),y
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lda K.LoadEXEYA.hMem
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tax return hMEM to Caller...
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jsr K.GetMemPtrA
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clc ...and Y,A=PTR to CS
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rts
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.98 pha
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lda K.LoadEXEYA.hMem
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jsr K.FreeMemA Discard Loaded Code
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pla
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sec
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.99 rts
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*--------------------------------------
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K.LoadEXEYA.Filename .BS 2
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K.LoadEXEYA.hMem .BS 1
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*--------------------------------------
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* BIN.InstallDRV
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* In:
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* pDrv = .DRV File Loaded Address
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* Note:
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* K.LoadEXEYA called from K.LoadDrvYA
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* Already setup correctly pDrv,
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* BIN.Relocate.Start,End
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*--------------------------------------
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BIN.InstallDRV ldy #H.BIN.DRV.CODE.O
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lda (pDrv),y
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clc
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adc BIN.Relocate.Start Advance start From AUXTYPE to AUXTYPE+DRV code offset
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sta BIN.Relocate.Start
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iny
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lda (pDrv),y
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adc BIN.Relocate.Start+1
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sta BIN.Relocate.Start+1
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lda DevMgr.Free Offset = Target DRV address-(AUXTYPE+DRV OFFSET)
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sec
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sbc BIN.Relocate.Start
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sta BIN.Relocate.Offset
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lda DevMgr.Free+1
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sbc BIN.Relocate.Start+1
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sta BIN.Relocate.Offset+1
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lda BIN.Relocate.End Compute DRVLen=End-start
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sec
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sbc BIN.Relocate.Start
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sta BIN.InstallDRV.DRVLen
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lda BIN.Relocate.End+1
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sbc BIN.Relocate.Start+1
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sta BIN.InstallDRV.DRVLen+1
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lda DevMgr.Free
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clc
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adc BIN.InstallDRV.DRVLen
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sta BIN.InstallDRV.DRVEnd
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tay Save DRVEnd LO
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lda DevMgr.Free+1
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adc BIN.InstallDRV.DRVLen+1 A = DRVEnd HI
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sta BIN.InstallDRV.DRVEnd+1
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bcs .9 we crossed $FFFF, out of mem
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cpy #DevMgr.HiMem
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sbc /DevMgr.HiMem
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bcs .9 No More Room to load Driver....
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lda DevMgr.LastDevID
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inc
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cmp #K.DEV.MAX
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bne .10 No Device Handle Left
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lda #DEVMGR.ERROOH
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sec
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rts
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.9 lda #DEVMGR.ERROOM
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sec
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rts
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.10 sta DevMgr.LastDevID
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>SYSCALL GetDevByIDA
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>STYA ZPQuickPtr2 setup Ptr2 to dest HEADER
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ldy #H.BIN.DRV.HEADER.O
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lda (pDrv),y
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clc
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adc pDrv
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sta ZPQuickPtr1
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iny
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lda (pDrv),y
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adc pDrv+1
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sta ZPQuickPtr1+1 set Ptr1 to Src HEADER
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ldy #S.DEV-1
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.1 lda (ZPQuickPtr1),y copy header to DevMgr.Table
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sta (ZPQuickPtr2),y
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dey
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bpl .1
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ldy #S.DEV.ID
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lda DevMgr.LastDevID
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sta (ZPQuickPtr2),y
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dey #S.DEV.JMP+1 Setup Main JMP
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lda DevMgr.Free+1
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sta (ZPQuickPtr2),y
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tax
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dey #S.DEV.JMP
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lda DevMgr.Free
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sta (ZPQuickPtr2),y
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sta ZPQuickPtr2 set Ptr2 to Dest CODE
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stx ZPQuickPtr2+1
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ldy #H.BIN.DRV.CODE.O
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lda (pDrv),y
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clc
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adc pDrv
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sta ZPQuickPtr1
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iny
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lda (pDrv),y
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adc pDrv+1
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sta ZPQuickPtr1+1 set Ptr1 to Src CODE
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lda BIN.InstallDRV.DrvLen+1
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eor #$ff
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pha
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lda BIN.InstallDRV.DrvLen
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eor #$ff
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tax
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ldy #0
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.2 inx Move CODE in LC
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bne .3
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pla
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inc
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beq .4
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pha
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.3 lda (ZPQuickPtr1),y
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sta (ZPQuickPtr2),y
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iny
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bne .2
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inc ZPQuickPtr1+1
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inc ZPQuickPtr2+1
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bra .2
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.4 ldy #H.BIN.DRV.CODE.LEN
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lda DevMgr.Free Make Ptr1 = code start
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sta ZPQuickPtr1
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clc
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adc (pDrv),y
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sta ZPQuickPtr2
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iny
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lda DevMgr.Free+1
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sta ZPQuickPtr1+1
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adc (pDrv),y
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sta ZPQuickPtr2+1 Make ZPQuickPtr2 = ZPQuickPtr1 + CodeLen
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jsr BIN.RelocateDRV
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>LDYA BIN.InstallDRV.DrvEnd
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>STYA DevMgr.Free
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clc
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rts
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*--------------------------------------
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BIN.InstallDRV.DrvLen .BS 2
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BIN.InstallDRV.DrvEnd .BS 2
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*--------------------------------------
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* BIN.Relocate___ :
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* In :
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* ZPQuickPtr1 = Ptr to Code
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* ZPQuickPtr2 = End Of Code
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*--------------------------------------
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BIN.Relocate.Start .BS 2
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BIN.Relocate.End .BS 2
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BIN.Relocate.Offset .BS 2
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*--------------------------------------
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BIN.RelocateEXE ldy #H.BIN.HEADER+1
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lda (ZPQuickPtr1),y
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cmp /H.BIN.HEADER.BIN65
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beq .1
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cmp /H.BIN.HEADER.DRV65
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beq .1
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lda #SYSMGR.ERRIBIN
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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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lda (ZPQuickPtr1),y
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clc
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adc BIN.Relocate.Offset
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sta (ZPQuickPtr1),y
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iny
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lda (ZPQuickPtr1),y
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adc BIN.Relocate.Offset+1
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sta (ZPQuickPtr1),y
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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.RelocateDRV ldy #H.BIN.DRV.REL.TABLE
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.1 lda (ZPQuickPtr1),y Start Relocate JMP table
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tax LO in X
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iny
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ora (ZPQuickPtr1),y ORA with HI
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beq .2 $0000 = end of table
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dey
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txa get back LO
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clc
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adc BIN.Relocate.Offset
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sta (ZPQuickPtr1),y
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iny
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lda (ZPQuickPtr1),y
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adc BIN.Relocate.Offset+1
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sta (ZPQuickPtr1),y
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iny
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bra .1
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*--------------------------------------
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.2 tya add current offset in Y to Ptr
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sec + 1 to skip last 00 from beq .2
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adc ZPQuickPtr1
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sta ZPQuickPtr1
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bcc .3
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inc ZPQuickPtr1+1 ZPQuickPtr1=Current Code PTR
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.3 lda (ZPQuickPtr1) get OPCODE
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lsr /2
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tax
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lda BIN.OPCODES,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 .6 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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lda (ZPQuickPtr1),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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cpx BIN.Relocate.Start
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lda (ZPQuickPtr1),y Get HI
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sbc BIN.Relocate.Start+1
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bcc .5 addr < BIN.Relocate.Start, out of range
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txa Get back LO
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cpx BIN.Relocate.End
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lda (ZPQuickPtr1),y Get HI
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sbc BIN.Relocate.End+1
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bcs .5 addr > BIN.Relocate.End, out of range
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txa Get back LO
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* clc CC from bcs .6
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adc BIN.Relocate.Offset add Offset to abs address
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dey
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sta (ZPQuickPtr1),y store relocated addr LO
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iny
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lda (ZPQuickPtr1),y Get HI
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adc BIN.Relocate.Offset+1
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sta (ZPQuickPtr1),y store relocated addr HI
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.5 pla get back Opcode length...
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.6 clc A = OPCODE length
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adc ZPQuickPtr1
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sta ZPQuickPtr1
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bcc .7
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inc ZPQuickPtr1+1
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.7 eor ZPQuickPtr2 A = ZPQuickPtr1
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bne .3
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lda ZPQuickPtr1+1
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eor ZPQuickPtr2+1
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bne .3 next opcode....
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.8 rts
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*--------------------------------------
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* 65C02 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.OPCODES .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 SYS/KERNEL.S.BIN
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LOAD SYS/KERNEL.S
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ASM
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