mirror of
https://github.com/A2osX/A2osX.git
synced 2024-06-02 13:41:30 +00:00
556 lines
11 KiB
Plaintext
556 lines
11 KiB
Plaintext
NEW
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PREFIX /A2OSX.BUILD
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AUTO 4,1
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*--------------------------------------
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* LoadLib
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* in :
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* Y,A = PTR To "LibName.o" 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 BIN.FindLIB
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bcs .9
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jsr BIN.Load Y,A = "/PATH/BIN"
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bcs .9
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stx .8+1
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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 $ffff Self Modified, Call LIB.LOAD function
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bcs .99
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.8 lda #$ff hLib
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clc
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.9 rts
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.99 pha
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lda .8+1
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jsr K.FreeMem
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pla
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sec
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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.GetMemByID
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>STYA ZPPtr1
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ldy #S.MEM.REFCNT
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lda (ZPPtr1),y Get count of those referencing this lib
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dec only one left ?
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beq .1
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sta (ZPPtr1),y
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pla
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clc
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rts
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.1 ldy #S.MEM.PTR
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lda (ZPPtr1),y
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sta .2+1
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iny
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lda (ZPPtr1),y
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sta .2+2
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ldx #LIBMGR.UNLOAD
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.2 jsr $ffff Self Modified, Call LIB.UNLOAD function
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pla
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jmp K.FreeMem
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*/--------------------------------------
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* # LoadDrv
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* ## ASM
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* **In:**
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* Y,A = PTR to "NAME.DRV [PARAM]" C-String
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* **Out:**
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* none
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*\--------------------------------------
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K.LoadDrv >STYA .2+1 Save "BIN\0ARGS\0\0"
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jsr BIN.FindDRV
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bcs .9
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jsr BIN.Load Y,A = "/PATH/BIN"
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bcs .9
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>STYA .3+1
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stx .97+1
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ldx #$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 $ffff SELF MODIFIED, call Dev.Detect
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bcs .96
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jsr .96 Cleanup...
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lda #0 Make sure RC = 0 if success
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clc
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.9 rts
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.96 pha
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.97 lda #$ff
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jsr K.FreeMem
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pla
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sec
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rts
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*--------------------------------------
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BIN.FindLIB clc
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.HS B0 bcs
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BIN.FindDRV sec
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>STYA BIN.CmdLine
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>LDYAI BIN.Find.ENV.LIB
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bcc .1
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>LDYAI BIN.Find.ENV.DRV
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.1 jsr K.GetEnv get value for Search Path
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bcs .9
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>STYA K.FileSearch.SearchPath
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>LDYA BIN.CmdLine
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jsr K.FileSearch.YA find LIB/DRV in Search
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bcs .9
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>LDYAI K.Buf256
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clc
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.9 rts
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*--------------------------------------
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BIN.Find.ENV.DRV .AZ "DRV"
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BIN.Find.ENV.LIB .AZ "LIB"
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*--------------------------------------
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* BIN.Load
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* in :
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* Y,A = /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 >STYA BIN.CmdLine
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>STYA .2+1
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ldx Mem.LastSlot
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beq BIN.Load.1
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>LDYAI Mem.Table
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>STYA ZPPtr1
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ldx #0
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.1 lda (ZPPtr1)
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bpl .6 In Use?
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ldy #S.MEM.BIN any BIN PATH in this slot?
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lda (ZPPtr1),y
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beq .6
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jsr K.GetMemPtr get pathname
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>STYA .3+1
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ldy #0
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.2 lda $ffff,y SELF MODIFIED
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.3 cmp $ffff,y SELF MODIFIED
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bne .6
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iny
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ora #0
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bne .2
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ldy #S.MEM.REFCNT
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lda (ZPPtr1),y
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inc
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sta (ZPPtr1),y
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txa
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jmp K.GetMemPtr X=hMem from K.GetMemByNameA
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.6 lda ZPPtr1
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clc
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adc #S.MEM
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sta ZPPtr1
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bcc .7
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inc ZPPtr1+1
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.7 inx
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cpx Mem.LastSlot
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bne .1
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*--------------------------------------
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BIN.Load.1 >PUSHWI K.S.STAT
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>LDYA BIN.CmdLine
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>SYSCALL STAT BANK1!!! Look for AUXTYPE
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bcs .9
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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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>PUSHBI S.FI.T.BIN
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>PUSHBI SYS.FOpen.R
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>PUSHW BIN.CmdLine
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>SYSCALL LoadFile BANK1!!!
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.9 bcs .99 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 CC from bcs .99
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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 -> 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.R.CS.Start
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sta BIN.R.Offset Offset=ZPPtr1-AUXTYPE
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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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ldy #H.BIN.CODE.LEN get Code Len
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lda (ZPPtr1),y
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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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iny
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lda (ZPPtr1),y
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adc BIN.R.CS.Start+1
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sta BIN.R.CS.End+1
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jsr BIN.RelExe
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>LDYA BIN.CmdLine get back bin path
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jsr K.NewStr make a copy of this string
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bcs .98
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lda BIN.hMem Keep X=hMem
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jsr K.GetMemByID X unmodified
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>STYA ZPPtr1
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lda (ZPPtr1)
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ora #S.MEM.F.CODE This is a code segment
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sta (ZPPtr1)
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txa Get Back hMem
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ldy #S.MEM.BIN
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sta (ZPPtr1),y
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lda BIN.hMem
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tax return hMEM to Caller...
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jmp K.GetMemPtr ...and Y,A=PTR to CS
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.98 pha
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lda BIN.hMem
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jsr K.FreeMem 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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BIN.CmdLine .BS 2
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BIN.hMem .BS 1
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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 * drvcsend, 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.END`
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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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* **Out:**
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* Y,A = Ptr to installed driver
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*\--------------------------------------
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K.InsDrv >STYA ZPPtr1
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>PULLW BIN.R.CS.Start
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>PULLW BIN.R.CS.End
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>PULLW BIN.R.End
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lda BIN.R.End Compute DRVLen=End-start
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sec
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sbc BIN.R.CS.Start
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sta BIN.Move.Len
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lda BIN.R.End+1
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sbc BIN.R.CS.Start+1
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sta BIN.Move.Len+1
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lda DevMgr.Free Compute new DevMgr.Free
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clc
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adc BIN.Move.Len
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tay Save DRVEnd LO
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lda DevMgr.Free+1
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adc BIN.Move.Len+1 A = DRVEnd HI
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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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>LDYA DevMgr.Free
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jsr BIN.MoveToYA
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lda DevMgr.Free
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sta ZPPtr1
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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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lda DevMgr.Free+1
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sta ZPPtr1+1
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sbc BIN.R.CS.Start+1
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sta BIN.R.Offset+1
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jsr BIN.RelDrv
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lda DevMgr.Free
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tay
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clc
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adc BIN.Move.Len
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sta DevMgr.Free
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lda DevMgr.Free+1
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pha
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adc BIN.Move.Len+1
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sta DevMgr.Free+1
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pla
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clc
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rts
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.9 lda #K.E.OOM
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sec
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rts
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*--------------------------------------
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BIN.Move.Len .BS 2
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*--------------------------------------
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BIN.MoveToYA >STYA ZPPtr2
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lda BIN.Move.Len+1
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eor #$ff
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pha
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lda BIN.Move.Len
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eor #$ff
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tax
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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 (ZPPtr1),y
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sta (ZPPtr2),y
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iny
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bne .1
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inc ZPPtr1+1
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inc ZPPtr2+1
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bra .1
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.3 rts
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*--------------------------------------
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* BIN.Rel___ :
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*--------------------------------------
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BIN.R.CS.Start .BS 2
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BIN.R.CS.End .BS 2
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BIN.R.End .BS 2
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BIN.R.Offset .BS 2
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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 #K.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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lda (ZPPtr1),y
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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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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 lda (ZPPtr1),y Start Relocate JMP table
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tax LO in X
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iny
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ora (ZPPtr1),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.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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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 ZPPtr1
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sta ZPPtr1
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bcc .3
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inc ZPPtr1+1 ZPPtr1=Current Code PTR
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.3 lda BIN.R.CS.End compute new CS.END to stop relocating
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clc
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adc BIN.R.Offset
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sta .7+1
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lda BIN.R.CS.End+1
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adc BIN.R.Offset+1
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sta .71+1
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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 .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 (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 .5 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 .5 addr > BIN.R.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.R.Offset add Offset to abs address
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dey
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sta (ZPPtr1),y store relocated addr LO
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iny
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lda (ZPPtr1),y Get HI
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adc BIN.R.Offset+1
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sta (ZPPtr1),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 ZPPtr1
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sta ZPPtr1
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bcc .7
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inc ZPPtr1+1
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.7 eor #$ff SELF MODIFIED A = ZPPtr1
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bne .3
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lda ZPPtr1+1
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.71 eor #$ff SELF MODIFIED
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bne .3 next opcode....
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.8 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 /A2OSX.SRC/SYS/KERNEL.S.BIN
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LOAD /A2OSX.SRC/SYS/KERNEL.S
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ASM
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