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A2osX/SYS/KERNEL.S.BIN.txt

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Another Bunch of fixes
2015-03-14 21:48:35 +00:00
PR#3
Loader & KM modules implemented
2015-03-15 22:00:40 +00:00
PREFIX /A2OSX.BUILD
Another Bunch of fixes
2015-03-14 21:48:35 +00:00
NEW
INC 1
AUTO 6
.LIST OFF
.OP 65C02
*--------------------------------------
* S.LoadBinA
* in :
* A = hMem of FilePath (PSTRING)
* out :
* Y,A = MEMPTR
* X = hMem of Code Segment
*--------------------------------------
S.LoadBinA sta R.DH save file path
jsr S.GetMemByNameA
bcs .1 not already loaded
>STYA R.AX Save base address
ldy #S.MEM.REFCNT
lda (R.AX),y
inc
sta (R.AX),y
ldy #S.MEM.PTR
lda (R.AX),y
pha Y,A = MEM PTR...
iny
lda (R.AX),y
ply X=hMem from S.GetMemByNameA
clc
rts
.1 lda R.DH
jsr S.LoadFileA
bcs .99
>STYA R.BX save file length for relocation
stx R.DL save hMem
txa
jsr S.GetMemPtrA
>STYA R.AX save base address for relocation
lda R.DH
jsr S.MLIGetFileInfoA Get File Info for AUXTYPE
bcs .98
>STYA ZPQuickPtr1
ldy #2 get AUXTYPE
lda (ZPQuickPtr1),y
sta R.CL
iny
lda (ZPQuickPtr1),y
sta R.CH save File load address for relocation
lda R.AL compute offset for relocation....
sec
sbc R.CL ...AX-CX...
sta R.CL
lda R.AH
sbc R.CH
sta R.CH ...to CX
jsr S.BinRelocate
bcs .98 relocation error, dicard Code segment
lda R.DH get back bin path
jsr S.PStrCpyA
bcs .98
pha save copy of bin path
lda R.DL
jsr S.GetMemByIDA
>STYA ZPQuickPtr1
lda (ZPQuickPtr1)
ora #S.MEM.F.CODE This is a code segment
sta (ZPQuickPtr1)
ldy #S.MEM.BIN
pla get back copy of bin path
sta (ZPQuickPtr1),y
>LDYA R.AX return CS PTR ... not modified by S.LoadCodeReloc
ldx R.DL ...and hMEM to Caller
clc
rts
.98 pha
lda R.DL
jsr S.FreeMemA Discard Loaded Code
pla
.99 sec
rts
*--------------------------------------
* S.LoadDrvA
* in :
* A = hMem To Full Cmd Line
* out :
* none
*--------------------------------------
S.LoadDrvA >PUSHA push Cmd Line for S.PStrGetTkn
>LDYAI MSG.DRVLOAD
jsr S.SysScrPPSTR
jsr S.CreateDevice
bcc .1
pha save error code
>PULLA discard Cmd Line
pla
sec
rts
.1 >PUSHBI $20 Push SEP=' '
>PUSHBI 0 Push 0 for getting CMD And ARGS
jsr S.PStrGetTkn
bcs .98
ldy #S.DEV.hCMD
sta (DEVMGR.DEVPTR),y
>PUSHA push CMD for S.FileSearch
txa
ldy #S.DEV.hARGS
sta (DEVMGR.DEVPTR),y
>PUSHWI ENV.DRV push ENVNAME=DRV
ldy #S.PS.hENV
lda TSKMGR.TABLE,y Get PS #0 Env
>PUSHA
jsr S.GetEnvVarP get value for ENV=%DRV%
bcs .98
sta LoadDrv.ENV
>PUSHA A=PStr to Value
jsr S.FileSearch find File in %DRV%
bcs .98 not Found
sta LoadDrv.BIN
jsr S.SysScrPPSTRA
lda LoadDrv.BIN
jsr S.LoadBinA X = BinPath hMem
bcs .97
>STYA Kernel.JMP save PTR to Code Segment
txa
ldy #S.DEV.hCS
sta (DEVMGR.DEVPTR),y save CS hMem in DEVSLOT
lda LoadDrv.BIN
jsr S.FreeMemA
lda LoadDrv.ENV
jsr S.FreeMemA
ldx #DEVMGR.OPEN
>LDYA DEVMGR.DEVPTR
jsr Kernel.DRVCALL Call DRV Open function
bcs .99
lda (DEVMGR.DEVPTR)
ora #S.DEV.F.INUSE Get Device Flags in A
sta (DEVMGR.DEVPTR)
clc
rts
.97 pha save error code
lda LoadDrv.BIN
jsr S.FreeMemA discard BIN in case of failed load
pla
.98 pha
lda LoadDrv.ENV
jsr S.FreeMemA
pla
.99 pha
jsr S.DestroyDevice
pla
sec
rts
*--------------------------------------
* S.LoadLib
* in :
* PULLW = PTR To Lib Name
* out :
* A = hMem To loaded LIB
*--------------------------------------
S.LoadLib jsr S.NewPStr
bcs .99
pha save LibName hMem for discard
jsr S.LoadLibA
bcs .98
plx get back STR hMem
pha save error code/hMem
txa
jsr S.FreeMemA discard STR hMem
pla get back error code/hMem
clc
rts
.98 plx get back STR hMem
pha save error code/hMem
txa
jsr S.FreeMemA discard STR hMem
pla get back error code/hMem
sec
.99 rts
*--------------------------------------
* S.LoadLibA
* in :
* A = hMem To Lib Name
* out :
* A = hMem of Loaded Lib
*--------------------------------------
S.LoadLibA >PUSHA push libname for S.FileSearch
>LDYAI MSG.LOADLIB
jsr S.SysScrPPSTR
>PUSHWI ENV.LIB push ENVNAME=LIB
ldy #S.PS.hENV
lda (TSKMGR.TSKPTR),y
>PUSHA
jsr S.GetEnvVarP get value for ENV=LIB
bcs .99
pha save hMem to LIB VALUE
>PUSHA Push %LIB% VALUE
jsr S.FileSearch find libname in %LIB%
bcs .98
pha save hMem to LIB full path
jsr S.SysScrPPSTRA
pla
pha
jsr S.LoadBinA A = hMem of filename full path
bcs .97
phx
>STYA Kernel.JMP
ldx #LIBMGR.LOAD
jsr Kernel.LIBCALL Call LIB.LOAD function
bcs .97
plx
pla discard LIB PATH
jsr S.FreeMemA
pla discard LIB VALUE
jsr S.FreeMemA
txa
clc
rts
.97 pla discard LIB PATH
jsr S.FreeMemA
.98 pla discard LIB VALUE
jsr S.FreeMemA
sec
.99 rts
*--------------------------------------
* S.UnloadLibA
* in :
* A = hMem To Lib
* out :
*--------------------------------------
S.UnloadLibA pha
jsr S.GetMemByIDA
>STYA ZPQuickPtr1
ldy #S.MEM.REFCNT
lda (ZPQuickPtr1),y Get count of those referencing this lib
dec only one left ?
beq .1
sta (ZPQuickPtr1),y
pla
clc
rts
.1 ldy #S.MEM.PTR
lda (ZPQuickPtr1),y
pha
iny
lda (ZPQuickPtr1),y
ply
>STYA Kernel.JMP
ldx #LIBMGR.UNLOAD
jsr Kernel.BINCALL Call LIB.UNLOAD function
pla
jmp S.FreeMemA
*--------------------------------------
* S.BinRelocate :
* R.AX = base address to start relocate
* R.BX = segment length (including data)
* R.CX = offset to apply to all abs addresses within segment
* R.DX unmodified
*--------------------------------------
S.BinRelocate lda (R.AX)
cmp #K.BIN.MAGICHEADER
bne .99
ldy #1
lda (R.AX),y
cmp /K.BIN.MAGICHEADER
beq .1
.99 sec Not a Valid Relocatable BIN File, exiting
rts
.1 >PUSHW R.DX
lda R.AL
clc
adc R.BL Make BX end of Segment Range (BX=AX+BX)
sta R.BL
lda R.AH
adc R.BH
sta R.BH
iny
.2 lda (R.AX),y Start Relocate JMP table
clc
adc R.CL
tax save LO to X
iny
lda (R.AX),y if HI = 0,we are done
beq .3
adc R.CH
sta (R.AX),y
dey
txa get back LO
sta (R.AX),y
iny
iny
bra .2
.3 iny we already skipped the 2 "0" bytes indicating end of JMP table
lda R.AL
clc
adc (R.AX),y make DX = end of opcode range
sta R.DL
iny
lda R.AH
adc (R.AX),y
sta R.DH
iny
* Start relocating opcodes between R.AX and R.DX with abs addressing pointing between R.AX and R.BX
* Applying offset = R.CX
tya add current offset in Y to R.AX
clc
adc R.AL
sta ZPQuickPtr1
lda #0
adc R.AH
sta ZPQuickPtr1+1
.4 lda (ZPQuickPtr1) get OPCODE
tax
lda OPCODES,x get OPCODE definition
bpl .7 abs addressing?
ldy #1
lda (ZPQuickPtr1),y Get LO
clc
adc R.CL add CX to abs address
sta ZPQuickPtr2 store relocated addr LO
iny
lda (ZPQuickPtr1),y Get HI
adc R.CH
sta ZPQuickPtr2+1 store relocated addr LO
dey
lda ZPQuickPtr2 Get new LO
sec
sbc R.AL
iny
lda ZPQuickPtr2+1 Get new HI
sbc R.AH
bcc .6 new addr < AX, out of range
dey
lda ZPQuickPtr2 Get new LO
sec
sbc R.BL
iny
lda ZPQuickPtr2+1 Get new HI
sbc R.BH
bcs .6 new addr > BX, out of range
dey
lda ZPQuickPtr2 Get new LO
sta (ZPQuickPtr1),y
iny
lda ZPQuickPtr2+1 Get new HI
sta (ZPQuickPtr1),y
.6 lda OPCODES,x
.7 and #$3 get OPCODE length
clc
adc ZPQuickPtr1
sta ZPQuickPtr1
bcc .8
inc ZPQuickPtr1+1
.8 sec A already got Ptr LO
sbc R.DL
lda ZPQuickPtr1+1 is Ptr greater than DX ?
sbc R.DH
bcc .4 no, continue relocating
>PULLW R.DX
clc
rts
*--------------------------------------
MSG.DRVLOAD >PSTRING "\nLoadDrv:"
MSG.LOADLIB >PSTRING "\nLoadLib:"
LoadDrv.ENV .BS 1
LoadDrv.BIN .BS 1
*--------------------------------------
* 65C02 OPCODES
* Bit 7 : 1 absolute addressing
* Bit 1-0 : opcode + @ length
*--------------------------------------
* x0.x1.x2.x3.x4.x5.x6.x7.x8.x9.xA.xB.xC.xD.xE.xF
OPCODES .HS 01.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.83.83.83.03
.HS 83.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.83.83.83.03
.HS 01.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.01.83.83.03
.HS 01.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.01.83.83.03
.HS 02.02.02.01.02.02.02.02.01.02.01.01.83.83.83.03
.HS 02.02.02.01.02.02.02.02.01.83.01.01.01.83.83.03
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.BIN
LOAD SYS/KERNEL.S
ASM
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