mirror of
https://github.com/elliotnunn/NetBoot.git
synced 2024-11-08 20:07:50 +00:00
992 lines
34 KiB
Plaintext
992 lines
34 KiB
Plaintext
myUnitNum equ 52
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myDRefNum equ ~myUnitNum
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Code
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cmp.l #1,4(SP)
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beq getBootBlocks
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cmp.l #2,4(SP)
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beq getSysVol
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cmp.l #3,4(SP)
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beq mountSysVol
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move.l #-1,d0
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rts
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getBootBlocks
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; Now is the time to install our DRVR because we are guaranteed an opportunity to boot if we don't fuck up.
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link A6,#-$32
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movem.l A2-A4/D3-D7,-(SP)
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; Copy the DRVR -> A2
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move.l #DrvrEnd-DrvrBase,D0
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lea DrvrBase,A0
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bsr InstallUnderBufPtr
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move.l A0,A2
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; Patch the server address into the DRVR code
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move.l 12(A6),A0 ; global pointer
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move.l 24(A0),D0 ; AddrBlock
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lea gSaveAddr-DrvrBase(A2),A0
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move.b #10,15(A0) ; hardcode DDP protocol ID
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move.b D0,13(A0) ; socket
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lsr.w #4,D0
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lsr.w #4,D0
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move.b D0,11(A0) ; node
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swap D0
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move.w D0,7(A0) ; network
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; Patch the disk image name and size into the DRVR code
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bsr BootPicker ; A0 = pstring ptr
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lea gNumBlks-DrvrBase(A2),A1
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move.l -4(A0),(A1) ; the size is underneath the pstring ptr
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move.l -4(A0),D6 ; D6 = block count, needed for DQE
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lea gQFilename-DrvrBase(A2),A1 ; A1 = dest
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moveq.l #1,D0
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add.b (A0),D0
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dc.w $A22E ; _BlockMoveData
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; Install the driver in the unit table
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move.l #myDRefNum,D0
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dc.w $A43D ; _DrvrInstall ReserveMem
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; That call created a DCE. Find and lock.
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move.l $11C,A0 ; UTableBase
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move.l myUnitNum*4(A0),A0
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dc.w $A029 ; _HLock
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move.l (A0),A0
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; Populate the empty DCE that DrvrInstall left us
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move.l A2,0(A0) ; dCtlDriver is pointer (not hdl)
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move.w 0(A2),D0 ; get DRVR.drvrFlags
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bclr #6,D0 ; Clear dRAMBased bit (to treat dCtlDriver as a pointer)
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move.w D0,4(A0) ; set DCE.dCtlFlags
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move.w 2(A2),$22(A0) ; drvrDelay to dCtlDelay
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move.w 4(A2),$24(A0) ; drvrEMask to dCtlEMask
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move.w 6(A2),$26(A0) ; drvrMenu to dCtlMenu
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; Open the driver
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lea -$32(SP),SP
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move.l SP,A0
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bsr clearblock
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lea DrvrNameString,A1
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move.l A1,$12(A0) ; IOFileName
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dc.w $A000 ; _Open
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lea $32(SP),SP
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; Create a DQE
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move.l #$16,D0
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dc.w $A71E ; _NewPtr ,Sys,Clear
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add.l #4,A0 ; has some cheeky flags at negative offset
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move.l A0,A3
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lea gDQEAddr,A0
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move.l A3,(A0)
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; Populate the DQE
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move.l D6,D0 ; needs fixing for Ruby Slipper
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lsl.l #5,D0 ; convert to bytes
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lsl.l #4,D0
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swap D0
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move.l D0,$C(A3) ; dQDrvSz/dQDrvSz2
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move.l #$80080000,-4(A3) ; secret flags, see http://mirror.informatimago.com/next/developer.apple.com/documentation/mac/Files/Files-112.html
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move.w #1,4(A3) ; qType
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move.w #0,$A(A3) ; dQFSID should be for a native fs
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; Into the drive queue (which will further populate the DQE)
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bsr findFreeDriveNum ; get drvnum in D0
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lea gDriveNum,A0
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move.w D0,(A0)
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swap D0
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move.w #myDRefNum,D0 ; D0.H = drvnum, D0.L = drefnum
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move.l D0,D3 ; we need this in a sec
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move.l A3,A0
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dc.w $A04E ; _AddDrive
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; Open our socket
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lea -$32(SP),SP
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move.l SP,A0
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bsr clearblock
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move.w #-10,$18(A0) ; ioRefNum = .MPP
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move.w #248,$1A(A0) ; csCode = openSkt
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move.b #10,$1C(A0) ; socket = 10, same as ATBOOT uses
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lea DrvrSockListener-DrvrBase(A2),A2
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move.l A2,$1E(A0) ; listener
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dc.w $A004 ; _Control
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lea $32(SP),SP
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; Get the real 1024k of boot blocks to a temp location
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; (it will eventually get trashed, but we have time)
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lea 4096(A5),A4 ; above BootGlobals
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lea -$32(SP),SP
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move.l SP,A0
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bsr clearblock
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move.l D3,22(A0) ; IOVRefNum=drvnum, IORefNum=drefnum
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move.l A4,32(A0) ; IOBuffer
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move.l #1024,36(A0) ; IOReqCount = 2 blocks
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move.l #0,46(A0) ; IOPosOffset = 0
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move.w #1,44(A0) ; IOPosMode = from start
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dc.w $A002 ; _Read
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lea $32(SP),SP
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; Put the boot blocks in netBOOT's global data structure as requested
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move.l A4,A0
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move.l 12(A6),A1
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lea $BA(A1),A1
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move.l #$138,D0
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dc.w $A22E ; _BlockMoveData
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move.l A1,A0 ; A0 = truncated BBs
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move.l A4,A1 ; A1 = full-length BBs
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bsr HealInjuredBootBlocks
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; Sundry hacks to make the boot process kinda-work
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bsr DisableDiskCache
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bsr TrackMostRecentResource
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bsr FakeLapMgr
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bsr InstallMPPWrapper
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; bsr fixDriveNumBug ; not sure if I even need to do this any more?
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; Clean up our stack frame
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movem.l (SP)+,A2-A4/D3-D7
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unlk A6
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move.l #0,D0
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rts
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getSysVol ; pointless call :(
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move.l #0,D0
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rts
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mountSysVol
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link A6,#-$32
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movem.l A2-A4/D3,-(SP)
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lea gDriveNum,A0
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move.w (A0),D3
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; System 7 needs MountVol to return the right vRefNum
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move.l $366,A0 ; Steal existing PB from FSQHead
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; Set aside the FS queue to stop MountVol deadlocking
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move.w $360,-(SP) ; FSBusy
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move.l $362,-(SP) ; FSQHead
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move.l $366,-(SP) ; FSQTail
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clr.w $360
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clr.l $362
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clr.l $366
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; MountVol
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bsr clearblock
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move.w D3,$16(A0) ; ioVRefNum = ioDrvNum = the drive number
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dc.w $A00F ; _MountVol
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bne error
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; Restore the FS queue
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move.l (SP)+,$366
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move.l (SP)+,$362
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move.w (SP)+,$360
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; Tattle about the DQE and VCB
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move.l 4+12(A6),A1
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move.l $356+2,A0 ; VCBQHdr.QHead (maybe I should be clever-er)
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move.l A0,(A1)
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move.l 4+16(A6),A1
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lea gDQEAddr,A0
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move.l (A0),(A1)
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movem.l (SP)+,A2-A4/D3
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unlk A6
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move.l #0,d0
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rts
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error
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move.w #$7777,D0
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dc.w $A9C9
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; The .netBOOT driver installs a ToExtFS hook that triggers on _MountVol
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; and calls our mountSysVol. The hook routine checks that the drive number
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; is 4. On machines with >2 existing drives, this check fails, and we
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; never get called (i.e. Mini vMac).
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; The solution is to head patch the .netBOOT ToExtFS hook. We use a
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; one-shot patch on _MountVol to gain control after the hook is installed
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; but before it is called, and install our new hook.
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bystanderTrap equ $A00F ; _MountVol
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gTheirDriveNum dc.w 0
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gOrigBystanderTrap dc.l 0
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gOrigExtFS dc.l 0
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NetBootName dc.b 8, ".netBOOT", 0
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fixDriveNumBug
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; Get the .netBOOT driver refnum (only to search for the right drive)
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lea -$32(A6),A0 ; Use our caller's stack frame
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bsr clearblock
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lea NetBootName,A1
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move.l A1,$12(A0) ; IOFileName
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dc.w $A000 ; _Open
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bne error
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move.w $18(A0),D0 ; Result in IORefNum
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; Search for the drive with that number in dQRefNum
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lea 2(A1),A0 ; Treat qHead like qLink.
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nbFindLoop move.l (A0),A0 ; follow qLink
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cmp.w 8(A0),D0 ; is the dQRefNum the .netBOOT driver?
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beq.s nbFound ; then we found the .netBOOT drive
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cmp.l 6(A1),A0 ; have we reached qTail?
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beq error ; then we didn't find the .netBOOT drive
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bra.s nbFindLoop
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nbFound move.w 6(A0),D0 ; Get dqDrive (drive number)
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; Save drivenum in a global for our patch to use
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lea gTheirDriveNum,A0
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move.w D0,(A0)
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; Only install the patch if we need to
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cmp.w #4,D0 ; A drivenum of 4 will work anyway
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bne.s installOneshotPatch
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rts
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; Install a self-disabling patch on _MountVol
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installOneshotPatch
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move.w #bystanderTrap,D0 ; Save original in a global
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dc.w $A346 ; _GetOSTrapAddress
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lea gOrigBystanderTrap,A1
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move.l A0,(A1)
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move.w #bystanderTrap,D0 ; Install
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lea oneshotPatch,A0
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dc.w $A247 ; _SetOSTrapAddress
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rts
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; Our _MountVol patch
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oneshotPatch
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clr.l -(SP)
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movem.l D0/D1/A0/A1,-(SP) ; Save "OS trap" registers
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move.l $3F2,A0 ; Save the ToExtFS hook in a global to call later
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lea gOrigExtFS,A1
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move.l A0,(A1)
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lea toExtFSPatch,A0 ; Install the ToExtFS head patch
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move.l A0,$3F2
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lea gOrigBystanderTrap,A0 ; Remove this patch from _MountVol
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move.l (A0),A0
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move.l A0,16(SP)
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move.w #bystanderTrap,D0
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dc.w $A047 ; _SetTrapAddress
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movem.l (SP)+,D0/D1/A0/A1
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rts
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; Our head patch on the ToExtFS hook
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toExtFSPatch
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movem.l A0-A4/D1-D2,-(SP) ; Save the same registers at the real ToExtFS hook
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cmp.b #$F,$6+1(A0) ; Check for a _MountVol call (IOTrap+1)
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bne.s hookReturn
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lea gTheirDriveNum,A1 ; Check for the CORRECT drive number,
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move.w (A1),D0 ; instead of erroneously checking for 4.
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cmp.w $16(A0),D0 ; IODrvNum
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bne.s hookReturn
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lea gOrigExtFS,A1 ; Rejoin the ToExtFS hook AFTER the buggy code
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move.l (A1),A1
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hookScan add.l #2,A1 ; Scan for "lea DrvQHdr,A2" (or similar)
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cmp.w #$308,2(A1)
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bne.s hookScan
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jmp (A1) ; and enter at that point
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hookReturn movem.l (SP)+,A0-A4/D1-D2
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rts
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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clearblock
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move.w #$32/2-1,D0
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.loop clr.w (A0)+
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dbra D0,.loop
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lea -$32(A0),A0
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rts
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findFreeDriveNum ; and return it in D0. Free to trash the usual registers
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; Find a free drive number (nicked this code from BootUtils.a:AddMyDrive)
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LEA $308,A0 ; [DrvQHdr]
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MOVEQ #4,D0 ; start with drive number 4
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.CheckDrvNum
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MOVE.L 2(A0),A1 ; [qHead] start with first drive
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.CheckDrv
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CMP.W 6(A1),D0 ; [dqDrive] does this drive already have our number?
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BEQ.S .NextDrvNum ; yep, bump the number and try again.
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CMP.L 6(A0),A1 ; [qTail] no, are we at the end of the queue?
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BEQ.S .GotDrvNum ; if yes, our number's unique! Go use it.
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MOVE.L 0(A1),A1 ; [qLink] point to next queue element
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BRA.S .CheckDrv ; go check it.
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.NextDrvNum
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; this drive number is taken, pick another
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ADDQ.W #1,D0 ; bump to next possible drive number
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BRA.S .CheckDrvNum ; try the new number
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.GotDrvNum
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rts
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DrvrNameString
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dc.b 8, ".LANDisk", 0
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gDriveNum dc.w 0
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gDQEAddr dc.l 0
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; code on this side is for start only, and stays in the netBOOT driver globals until released
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BufPtrCopy
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; code on this side gets copied beneath BufPtr (is that the best place??)
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; Shall we start with a driver?
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DrvrBase
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dc.w $4F00 ; dReadEnable dWritEnable dCtlEnable dStatEnable dNeedLock
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dc.w 0 ; delay
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dc.w 0 ; evt mask
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dc.w 0 ; menu
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dc.w DrvrOpen-DrvrBase
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dc.w DrvrPrime-DrvrBase
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dc.w DrvrControl-DrvrBase
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dc.w DrvrStatus-DrvrBase
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dc.w DrvrClose-DrvrBase
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dc.b 8, ".LANDisk", 0
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g
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gNumBlks dc.l 0 ; the source of all truth
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gMyDCE dc.l 0
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gTheirPB dc.l 0 ; pointer to the pending ParamBlk
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gQuery
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gQTypeVer dc.w 0 ; part of gQuery
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gQSeqNum dc.w 0 ; part of gQuery
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gQOffset dc.l 0 ; part of gQuery
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gQLen dc.l 0 ; part of gQuery
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gQFilename dcb.b 32 ; part of gQuery ; set by the init code
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gQueryEnd
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gWDS dcb.b 2+4+2+4+2
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gMyPB dcb.b $32+2 ; allow us to clear it with move.l's
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odd
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gSaveAddr dcb.b 16
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gAddr dcb.b 16
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even
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; a0=iopb, a1=dce on entry to all of these...
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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DrvrOpen
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move.l A0,-(SP)
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lea gMyDCE,A0 ; dodgy, need this for IODone
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move.l A1,(A0)
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move.l (SP)+,A0
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move.w #0,$10(A0) ; ioResult
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rts
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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DrvrPrime
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cmp.b #2,$7(A0) ; ioTrap == aRdCmd
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bne .notRead
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move.w #1,$10(A0) ; ioResult = pending. We will return without an answer.
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move.l A1,D0 ; save and restore A1
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lea gTheirPB,A1 ; keep a copy of the pending PB in our code (a bit messy)
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move.l A0,(A1)
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move.l D0,A1
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; For short requests, DevMgr puts offset in DCE
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; We, oddly, stuff a BLOCK offset into ioPosOffset
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btst.b #0,$2C(A0) ; test ioPosMode & kUseWidePositioning
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bne.s .wide
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.notwide move.l $10(A1),D0
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bra.s .gotD0
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.wide move.l $2E(A0),D0 ; the block offset can only be up to 32 bits
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or.l $32(A0),D0
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.gotD0 ror.l #4,D0 ; now D0 = (LS 23 bits) followed by (MS 9 bits)
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ror.l #5,D0
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move.l D0,$2E(A0) ; ioPosOffset = D0 = byte_offset/512
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movem.l A0-A4,-(SP) ; sleazy function that will trash stuff
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bsr.s DrvrTransmitRequest ; takes A0 as PB argument
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movem.l (SP)+,A0-A4
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bge.s .noerr
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dc.w $A9FF ; Elliot, this is where we get those "unimp traps"
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move.w #-36,$10(A0) ; ioResult = ioErr
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.noerr
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rts
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.notRead
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move.w #$DDDD,D0
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dc.w $A9C9
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move.w #-20,$10(A0)
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rts
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DrvrTransmitRequest ; On entry, A0=pb. Trashes A0-A4/D0 so be careful. Uses our globals extensively.
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lea g,A2
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move.b gSaveAddr-g(A2),gAddr-g(A2) ; reasonable way to copy the address struct, I guess
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move.l gSaveAddr-g+1(A2),gAddr-g+1(A2)
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move.l gSaveAddr-g+5(A2),gAddr-g+5(A2)
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move.l gSaveAddr-g+9(A2),gAddr-g+9(A2)
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move.w gSaveAddr-g+13(A2),gAddr-g+13(A2)
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move.b gSaveAddr-g+15(A2),gAddr-g+15(A2)
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move.w #$8001,gQTypeVer-g(A2) ; Means a polite request, v1
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addq.w #1,gQSeqNum-g(A2) ; Increment the sequence counter
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move.l $28(A0),D0 ; [ioActCount (in bytes)
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lsr.l #4,D0
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lsr.l #5,D0 ; / 512]
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add.l $2E(A0),D0 ; + ioPosOffset (in blocks)
|
|
move.l D0,gQOffset-g(A2) ; -> "offset" field of request
|
|
|
|
move.l $24(A0),D0 ; ioReqCount (in bytes)
|
|
sub.l $28(A0),D0 ; - ioActCount (in bytes)
|
|
move.l D0,gQLen-g(A2) ; -> "length" field of request
|
|
|
|
lea gAddr,A3
|
|
clr.w gWDS-g(A2) ; WDS+0 reserved field
|
|
move.l A3,gWDS-g+2(A2) ; WDS+2 pointer to address struct
|
|
lea gQuery,A3
|
|
move.w #gQueryEnd-gQuery,gWDS-g+6(A2) ; WDS+6 length of second entry
|
|
move.l A3,gWDS-g+8(A2) ; WDS+8 pointer to second entry
|
|
clr.w gWDS-g+12(A2) ; WDS+10 zero to end the list
|
|
|
|
lea gMyPB,A0
|
|
.retry
|
|
bsr DrvrClearBlock
|
|
move.w #-10,$18(A0) ; ioRefNum = .MPP
|
|
move.w #246,$1A(A0) ; csCode = writeDDP
|
|
move.b #10,$1C(A0) ; socket = 10 (hardcoded)
|
|
move.b #1,$1D(A0) ; set checksumFlag
|
|
pea gWDS
|
|
move.l (SP)+,$1E(A0) ; wdsPointer to our WriteDataStructure
|
|
dc.w $A404 ; _Control ,async
|
|
|
|
cmp.w #-91,$10(A0) ; This happens when the RAM MPP replaces the ROM one
|
|
bne.s .noNeedToRetry ; so we need to reopen socket #10, then retry...
|
|
|
|
bsr DrvrClearBlock
|
|
move.w #-10,$18(A0) ; ioRefNum = .MPP
|
|
move.w #248,$1A(A0) ; csCode = openSkt
|
|
move.b #10,$1C(A0) ; socket = 10 (hardcoded)
|
|
pea DrvrSockListener
|
|
move.l (SP)+,$1E(A0) ; listener
|
|
dc.w $A004 ; _Control (synchronous, better hope it doesn't deadlock!)
|
|
|
|
bra.s .retry
|
|
|
|
.noNeedToRetry
|
|
move.w $10(A0),D0 ; for our caller to figure out what went wrong
|
|
|
|
rts
|
|
|
|
DrvrClearBlock
|
|
move.w #$32/2-1,D0
|
|
.loop clr.w (A0)+
|
|
dbra D0,.loop
|
|
lea -$32(A0),A0
|
|
rts
|
|
|
|
DrvrSockListener ; works closely with the Prime routine
|
|
; A0 Reserved for internal use by the .MPP driver. You must preserve this register until after the ReadRest routine has completed execution.
|
|
; A1 Reserved for internal use by the .MPP driver. You must preserve this register until after the ReadRest routine has completed execution.
|
|
; A2 Pointer to the .MPP driver's local variables. Elliot says: the frame and packet header ("RHA") are at offset 1 from A2 (keeps the 2-byte fields aligned)
|
|
; A3 Pointer to the first byte in the RHA past the DDP header bytes (the first byte after the DDP protocol type field).
|
|
; A4 Pointer to the ReadPacket routine. The ReadRest routine starts 2 bytes after the start of the ReadPacket routine.
|
|
; A5 Free for your use before and until your socket listener calls the ReadRest routine.
|
|
; D0 Lower byte is the destination socket number of the packet.
|
|
; D1 Word indicating the number of bytes in the DDP packet left to be read (that is, the number of bytes following the DDP header).
|
|
; D2 Free for your use.
|
|
; D3 Free for your use.
|
|
|
|
cmp.b #10,-1(A3) ; DDP protocol type better be ATBOOT
|
|
bne.s .trashpacket
|
|
|
|
moveq.l #8,D3
|
|
jsr (A4) ; Read 8 bytes
|
|
|
|
cmp.w #$8101,-8(A3) ; Check protocol and version
|
|
bne.s .trashpacket
|
|
|
|
lea gQSeqNum,A5 ; Check packet sequence number
|
|
move.w (A5),D2
|
|
cmp.w -6(A3),D2
|
|
bne.s .trashpacket
|
|
|
|
lea gTheirPB,A5
|
|
move.l (A5),A5
|
|
move.l $28(A5),D2 ; keep this in D2 because we will use it in a sec
|
|
cmp.l -4(A3),D2 ; ioActCount = this offset?
|
|
bne.s .outoforder
|
|
|
|
move.l $20(A5),A3 ; ioBuffer
|
|
add.l D2,A3 ; A3 = ioBuffer + ioReqDone
|
|
move.l #512,D3 ; D3 = bytes to read = 512
|
|
add.l D3,D2 ; D2 = new ioReqDone = old ioReqDone + 512
|
|
jsr 2(A4) ; ReadRest
|
|
; From this point on, use A1 instead of A5
|
|
|
|
lea gTheirPB,A1
|
|
move.l (A1),A1
|
|
move.l D2,$28(A1) ; update ioActCount
|
|
cmp.l $24(A1),D2 ; does it equal ioReqCount?
|
|
bne.s .rts
|
|
|
|
lea gMyDCE,A1
|
|
move.l (A1),A1
|
|
|
|
moveq.l #0,D0
|
|
move.l $8FC,A0 ; jIODone (D0 = result, A1 = DCE)
|
|
jmp (A0)
|
|
|
|
|
|
.outoforder ; apparent dropped packet, so please resend
|
|
moveq.l #0,D3
|
|
jsr 2(A4) ; ReadRest nothing
|
|
|
|
movem.l A0-A4,-(SP)
|
|
lea gTheirPB,A0
|
|
move.l (A0),A0
|
|
bsr DrvrTransmitRequest
|
|
movem.l (SP)+,A0-A4
|
|
|
|
rts
|
|
|
|
move.w #$1111,D0 ; won't happen with old-school LocalTalk
|
|
dc.w $A9C9
|
|
|
|
.trashpacket
|
|
move.w #$BBBB,D0 ; take this out when I'm confident the case doesn't matter
|
|
dc.w $A9C9
|
|
|
|
moveq.l #0,D3
|
|
jmp 2(A4) ; ReadRest nothing
|
|
|
|
.rts
|
|
rts
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
DrvrControl
|
|
move.w #-17,$10(A0) ; ioResult = controlErr
|
|
bra DrvrFinish
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
DrvrStatus
|
|
cmp.w #6,$1A(A0)
|
|
beq.s status_fmtLstCode
|
|
cmp.w #8,$1A(A0)
|
|
beq.s status_drvStsCode
|
|
bra.s status_unknown
|
|
|
|
status_fmtLstCode ; tell them about our size
|
|
movem.l A2/A3,-(SP)
|
|
|
|
lea gNumBlks,A3
|
|
move.l (A3),D0
|
|
lsl.l #5,D0 ; convert from blocks to bytes
|
|
lsl.l #4,D0
|
|
|
|
move.w #1,$1C(A0)
|
|
move.l $1C+2(A0),A2
|
|
move.l D0,0(A2)
|
|
move.l #$40000000,4(A2)
|
|
|
|
movem.l (SP)+,A2/A3
|
|
|
|
move.w #0,$10(A0) ; ioResult = noErr
|
|
bra DrvrFinish
|
|
|
|
status_drvStsCode ; tell them about some of our flags
|
|
move.w #0,$1C(A0) ; csParam[0..1] = track no (0)
|
|
move.l #$80080000,$1C+2(A0) ; csParam[2..5] = same flags as dqe
|
|
|
|
move.w #0,$10(A0) ; ioResult = noErr
|
|
bra DrvrFinish
|
|
|
|
status_unknown
|
|
move.w $1A(A0),D0 ; dodgy, for debugging
|
|
add.w #$3000,D0
|
|
dc.w $A9C9
|
|
|
|
move.w #-18,$10(A0) ; ioResult
|
|
bra DrvrFinish
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
DrvrClose
|
|
move.w #$4444,D0
|
|
dc.w $A9C9
|
|
|
|
move.w #0,$10(A0) ; ioResult
|
|
rts
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
DrvrFinish
|
|
move.w 6(A0),D1 ; iopb.ioTrap
|
|
btst #9,D1 ; noQueueBit
|
|
bne.s DrvrNoIoDone
|
|
move.l $8FC,-(SP) ; jIODone
|
|
DrvrNoIoDone
|
|
rts
|
|
DrvrEnd
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
HealInjuredBootBlocks ; patch the BBs to fix themselves if executed
|
|
|
|
; Args: A0 = truncated boot blocks (138b), A1 = correct boot blocks (1024b)
|
|
|
|
; If these boot blocks are executable (from offset 2), then the 138 bytes of
|
|
; declarative data copied by the netBOOT driver are not enough. We edit the boot
|
|
; blocks with a stub that copies the entire 1k into place. System 7 needs this.
|
|
|
|
; This unfortunately clobbers the declarative part of the boot blocks, so we need to
|
|
; check for declarative boot blocks and leave them unchanged
|
|
|
|
move.l A0,-(SP) ; Save A1 to a global, but need to keep A0
|
|
lea .gFullLoc,A0
|
|
move.l A1,(A0)
|
|
move.l (SP)+,A0
|
|
|
|
move.b 6(A0),D0 ; BBVersion
|
|
cmp.b #$44,D0
|
|
beq.s .executable
|
|
and.b #$C0,D0
|
|
cmp.b #$C0,D0
|
|
beq.s .executable
|
|
rts
|
|
|
|
; Relevant structure of the boot blocks:
|
|
; 0-1 bbID always 'LK'
|
|
; 2-5 bbEntry BRA.W base+128
|
|
; 6-7 bbVersion interpreted as above
|
|
; 8-137 data
|
|
; 138-1023 code (MISSING from netBOOT's short version)
|
|
|
|
; Our self-repairing boot blocks:
|
|
; 0-1 bbID always 'LK'
|
|
; 2-5 bbEntry BRA.W base+8
|
|
; 6-7 bbVersion interpreted as above
|
|
; 8-13 JSR .inPlaceFixRoutine
|
|
; 14-137 junk
|
|
|
|
|
|
.executable ; Need to leave bytes 6,7 intact
|
|
move.l #$60000004,2(A0) ; BB+2: BRA.W BB+8
|
|
move.w #$4EB9,8(A0) ; BB+8: JSR .inPlaceFixRoutine (abs)
|
|
lea .inPlaceFixRoutine,A1
|
|
move.l A1,10(A0)
|
|
|
|
move.l A0,A1 ; Clear the icache with a BlockMove
|
|
move.l #138,D0
|
|
dc.w $A02E ; _BlockMove
|
|
|
|
rts
|
|
|
|
.inPlaceFixRoutine ; The BB stub JSRs to here
|
|
move.l (SP)+,A1 ; so the return address will be at BB+14
|
|
lea -14(A1),A1 ; "Rewind" to the start of the BB
|
|
move.l .gFullLoc,A0 ; And here are our full boot blocks
|
|
move.l #1024,D0
|
|
dc.w $A02E ; _BlockMove (needs to clear cache)
|
|
|
|
jmp 2(A1) ; Jump to the fixed-up BB
|
|
|
|
.gFullLoc dc.l 0 ; Stuff addr of full-length BB in here
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
DisableDiskCache
|
|
move.w #$1A0,D0 ; _GetResource
|
|
dc.w $A746 ; _GetToolTrapAddress
|
|
lea .jmpOld+2,A1
|
|
move.l A0,(A1)
|
|
|
|
lea .GetResourcePatch,A0
|
|
move.l #.GetResourcePatchEnd-.GetResourcePatch,D0
|
|
bsr InstallInSysHeap
|
|
|
|
move.w #$1A0,D0
|
|
dc.w $A647 ; _SetToolTrapAddress
|
|
|
|
rts
|
|
|
|
.GetResourcePatch
|
|
cmp.l #'ptch',6(SP)
|
|
bne.s .jmpOld
|
|
cmp.w #41,4(SP)
|
|
bne.s .jmpOld
|
|
|
|
bra.s .memoryhole
|
|
.jmpOld
|
|
jmp $12345678
|
|
.memoryhole move.l (SP)+,A0
|
|
addq #6,SP
|
|
clr.l (SP)
|
|
jmp (A0)
|
|
.GetResourcePatchEnd
|
|
|
|
|
|
|
|
TrackMostRecentResource
|
|
move.w #$1A0,D0 ; _GetResource
|
|
dc.w $A746 ; _GetToolTrapAddress
|
|
lea GRjmp+2,A1
|
|
move.l A0,(A1)
|
|
|
|
lea GetResourcePatch,A0
|
|
move.l #GetResourcePatchEnd-GetResourcePatch,D0
|
|
bsr InstallInSysHeap ; takes and returns A0
|
|
|
|
move.w #$1A0,D0
|
|
dc.w $A647 ; _SetToolTrapAddress
|
|
|
|
rts
|
|
|
|
GetResourcePatch
|
|
move.l A0,D0
|
|
lea GRrecord,A0
|
|
move.l 6(SP),(A0)+
|
|
move.w 4(SP),(A0)+
|
|
move.l 4(A6),(A0)+
|
|
move.l D0,A0 ; maybe the register needed saving??
|
|
GRjmp jmp $12345678
|
|
|
|
dc.l 'Elmo'
|
|
GRrecord dcb.b 20
|
|
GetResourcePatchEnd
|
|
|
|
|
|
|
|
FakeLapMgr
|
|
tst.l $B18
|
|
bgt.s .nofix
|
|
|
|
moveq.l #MyLapMgrEnd-MyLapMgr,D0
|
|
dc.w $A440 ; _ResrvMemSys
|
|
moveq.l #MyLapMgrEnd-MyLapMgr,D0
|
|
dc.w $A522 ; _NewHandleSys
|
|
dc.w $A029 ; _HLock
|
|
move.l (A0),A1
|
|
lea MyLapMgr,A0
|
|
moveq.l #MyLapMgrEnd-MyLapMgr,D0
|
|
dc.w $A02E ; _BlockMove
|
|
move.l A1,$B18 ; -> LAPMgrPtr
|
|
|
|
.nofix rts
|
|
|
|
MyLapMgr
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
rts
|
|
.exit
|
|
MyLapMgrEnd
|
|
|
|
|
|
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
InstallMPPWrapper
|
|
movem.l A2-A4,-(SP)
|
|
|
|
; Copy the fake .MPP DRVR, with its address in A2
|
|
move.l #MPPWrapperEnd-MPPWrapper,D0
|
|
lea MPPWrapper,A0
|
|
bsr InstallInSysHeap
|
|
move.l A0,A2
|
|
|
|
; Get DCE ptr in A0
|
|
move.l $11C,A0 ; UTableBase
|
|
move.l 9*4(A0),A0
|
|
move.l (A0),A0 ; got ptr to MPP DCE
|
|
|
|
; I have commented out the "driver is in a handle" lines
|
|
; Get driver code ptr in A1
|
|
move.l (A0),A1 ; should be a ptr, never a handle
|
|
; btst.b #6,4+1(A0)
|
|
; beq.s .isptr
|
|
; move.l (A1),A1
|
|
.isptr
|
|
|
|
; Copy some information over...
|
|
move.l (A1),(A2) ; all the flags
|
|
move.l 4(A1),4(A2)
|
|
|
|
moveq.l #5-1,D0 ; do it five times
|
|
lea 8(A1),A3 ; A3 = original relative word-size ptr
|
|
lea MPPOrigOpen-MPPWrapper(A2),A4 ; A4 = new absolute long-size ptr
|
|
.routineloop
|
|
clr.l D1
|
|
move.w (A3)+,D1
|
|
add.l A1,D1
|
|
move.l D1,(A4)+
|
|
dbra D0,.routineloop
|
|
|
|
; And "take over" the execution of the driver code
|
|
move.l A2,(A0) ; dCtlDriver = our new driver code
|
|
; bclr.b #6,4+1(A0) ; bit of a race condition, but who cares
|
|
|
|
movem.l (SP)+,A2-A4
|
|
|
|
rts
|
|
|
|
|
|
MPPWrapper
|
|
dc.w 0 ; flags, to be filled in
|
|
dc.w 0 ; delay
|
|
dc.w 0 ; evt mask
|
|
dc.w 0 ; menu
|
|
dc.w MPPOpen-MPPWrapper
|
|
dc.w MPPPrime-MPPWrapper
|
|
dc.w MPPControl-MPPWrapper
|
|
dc.w MPPStatus-MPPWrapper
|
|
dc.w MPPClose-MPPWrapper
|
|
dc.b 4,".MPP "
|
|
dc.w $3004 ; a version code
|
|
|
|
MPPOrigOpen dc.l 0
|
|
MPPOrigPrime dc.l 0
|
|
MPPOrigControl dc.l 0
|
|
MPPOrigStatus dc.l 0
|
|
MPPOrigClose dc.l 0
|
|
|
|
MPPOpen
|
|
move.l MPPOrigOpen,-(SP)
|
|
rts
|
|
|
|
MPPPrime
|
|
move.l MPPOrigPrime,-(SP)
|
|
rts
|
|
|
|
MPPControl
|
|
move.l MPPOrigControl,-(SP)
|
|
rts
|
|
|
|
MPPStatus
|
|
move.l MPPOrigStatus,-(SP)
|
|
rts
|
|
|
|
MPPClose
|
|
movem.l A0-A4/D0-D7,-(SP) ; ultra-cautious
|
|
|
|
; Preload some resources before networking goes away
|
|
|
|
clr.l -(SP)
|
|
move.l #'lmgr',-(SP)
|
|
move.w #0,-(SP)
|
|
dc.w $A9A0 ; _GetResource
|
|
addq.l #4,SP
|
|
|
|
clr.l -(SP)
|
|
move.l #'AINI',-(SP)
|
|
move.w #30000,-(SP)
|
|
dc.w $A9A0 ; _GetResource
|
|
addq.l #4,SP
|
|
|
|
clr.l -(SP)
|
|
move.l #'STR ',-(SP)
|
|
move.w #$BFE3,-(SP)
|
|
dc.w $A9A0 ; _GetResource
|
|
addq.l #4,SP
|
|
|
|
clr.l -(SP)
|
|
move.l #'STR#',-(SP)
|
|
move.w #$BF89,-(SP)
|
|
dc.w $A9A0 ; _GetResource
|
|
addq.l #4,SP
|
|
|
|
movem.l (SP)+,A0-A4/D0-D7
|
|
|
|
move.l MPPOrigClose,-(SP)
|
|
rts
|
|
|
|
ResourcesToPreload
|
|
|
|
MPPWrapperEnd
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
|
|
|
|
InstallInSysHeap
|
|
; takes A0/D0 as args, returns ptr in A0
|
|
movem.l A0/D0,-(SP)
|
|
dc.w $A51E ; NewPtr ,Sys
|
|
movem.l (SP)+,A1/D0 ; now A1=old, A0=new
|
|
exg A0,A1 ; now A1=new, A0=old
|
|
move.l D0,-(SP)
|
|
dc.w $A02E ; _BlockMove
|
|
move.l (SP)+,D0
|
|
exg A1,A0 ; now A1=old, A0=new
|
|
|
|
subq.l #1,D0
|
|
.wipeloop move.b $99,(A1)+
|
|
dbra D0,.wipeloop
|
|
|
|
rts
|
|
|
|
|
|
InstallUnderBufPtr
|
|
; takes A0/D0 as args, returns ptr in A0
|
|
sub.l D0,$10C ; BufPtr
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move.l $10C,A1
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move.l D0,-(SP)
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dc.w $A02E ; _BlockMove
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move.l (SP)+,D0
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exg A0,A1 ; now A1=old, A0=new
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subq.l #1,D0
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.wipeloop move.b $99,(A1)+
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dbra D0,.wipeloop
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rts
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BootPicker include "BootPicker.a"
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