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142 lines
6.1 KiB
Plaintext
142 lines
6.1 KiB
Plaintext
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; File: DeskMgrPatches.a
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;
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; Contains: Fixes to the Desk Manager
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;
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; Copyright: © 1990, 1992 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <5> 7/8/92 JSM Add comments about patches that have been rolled in.
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; <4> 2/10/92 JSM Moved this file to DeskMgr folder, keeping all the old
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; revisions.
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; <3> 8/30/90 dba add code for SystemClick heap scramble bug fixes
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; <2> 8/2/90 csd Patch SystemClick to be 32-Bit clean.
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; <1> 7/2/90 stb first checked in
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;
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;
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load 'StandardEqu.d'
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include 'LinkedPatchMacros.a'
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SysEvtAfterFrontWindow ROMBind (Plus, $15C2A), (SE, $10268), (II, $14FE0), (Portable, $15536), (IIci, $1C79C)
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SysEvtDoneSEvt ROMBind (Plus, $15C20), (SE, $1025C), (II, $14FD4), (Portable, $1552C), (IIci, $1C790)
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SystemClickContinue ROMBind (IIci, $1C856)
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CheckDeskHook ROMBind (IIci, $1C8A0)
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SearchWindow ROMBind (Plus, $15C40), (SE, $1027C), (II, $14FF4), (Portable, $15550), (IIci, $1C7B4)
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DoneSClick ROMBind (IIci, $1C894)
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AfterLoadResourceInSystemClick ROMBind (Plus, $15CDC), (SE, $10330), (II, $150A8), (Portable, $15606), (IIci, $1C86A)
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AfterFrontWindowInSystemClick ROMBind (Plus, $15CF8), (SE, $1034C), (II, $150C4), (Portable, $15622), (IIci, $1C886)
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AfterTrackGoAwayInSystemClick ROMBind (Plus, $15D58), (SE, $103AC), (II, $15124), (Portable, $15682), (IIci, $1C8E6)
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;————————————————————————————————————————————————————————————————————————————————————————————————————
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; SystemEvent — bail out if there is no window up
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; SystemEvent has a call to FrontWindow before dereferencing the front window's data structure.
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; This is bad if FrontWindow returns nil. This come-from patch to FrontWindow causes SystemEvent
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; to exit immediately with a return value of FALSE if FrontWindow returns nil.
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;
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; This patch has been rolled into DeskMgr.a.
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;
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SysEvtIgnoreNILFrontWindow ComeFromPatchProc \
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_FrontWindow,SysEvtAfterFrontWindow,(Plus,SE,II,Portable,IIci)
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addq #4,sp ; pop return address because we know it's always SysEvtAfterFrontWindow
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jsrOld ; go ahead and finish the FrontWindow
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tst.l (sp) ; is there no window up?
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bneROM SysEvtAfterFrontWindow ; there's a window, so we can continue as normal
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; we don't have a window, so bail out
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addq #4,sp ; pop the windowptr from the FrontWindow call
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jmpROM SysEvtDoneSEvt ; exit through the ROM
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EndProc
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;————————————————————————————————————————————————————————————————————————————————————————————————————
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; SystemClick - Make this routine 32-bit clean when it calls the WDEF and fix heap scramble bugs.
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;
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; This patch has been rolled into DeskMgr.a.
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;
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FixSystemClick PatchProc _SystemClick,(IIci)
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MOVEM.L D0/D3-D4/A3-A4,-(SP) ;preserve some work registers
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;D0 to reserve space on stack
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MOVE.L SP,-(SP) ;push "savePort"
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_GetPort ;remember the current grafPort on stack
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MOVE.L 24(SP),A4 ; get theWindow into A4
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MOVE.L WindowDef(A4),A3 ; get the window def proc handle into A3
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MOVE.L 28(SP),D4 ; get theEvent into D4
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MOVE.L A4,D0 ; test the window ptr
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beqROM CheckDeskHook ; if nil, check the desk hook
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MOVE.L A4,A0 ;pass in A0
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jsrROM SearchWindow ;find it in the driver list
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bneROM DoneSClick ;if not found, ignore the call
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MOVE.L A0,D3 ;remember DCE handle (formerly remembered the pointer) <3>
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;
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; we found the window in the device table; A1 points to the DCE entry of the driver
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; that owns the window. First see what part of the window its in by calling
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; the window definition proc to classify.
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;
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subq #2, SP ; room for window variant
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move.l A4, -(SP) ; push window pointer
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_GetWVariant ; legally get the window variant
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move.w (SP)+, D0 ; put the var code into D0 for the ROM
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jmpROM SystemClickContinue ; let the rom do the rest
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EndProc
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; The next patch is so that we keep the DCE handle instead of the pointer.
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; Not needed on the IIci because the above patch fixes it for that ROM.
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RememberDCEHandleInsteadOfPointer ComeFromPatchProc \
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_LoadResource,AfterLoadResourceInSystemClick,(Plus,SE,Portable,II)
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MOVE.L A4,A0 ;pass in A0
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jsrROM SearchWindow ;find it in the driver list (we know it will be found, we found it before)
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MOVE.L A0,D3 ;remember DCE handle (formerly remembered the pointer) <3>
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jmpOld
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EndProc
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; The next patch is so that we get the dCtlRefNum properly when we send a message to the driver.
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;
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; This patch has been rolled into DeskMgr.a.
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;
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GetDCtlRefNumFromHandleForSendDrvrMsg ComeFromPatchProc \
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_FrontWindow,AfterFrontWindowInSystemClick,(Plus,SE,Portable,II,IIci)
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move.l d3,a0 ;put DCE handle in an address register to dereference it
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move.l (a0),d3 ;get the DCE pointer now, like the ROM expects
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jmpOld
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EndProc
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; The next patch is so that we get the dCtlRefNum properly when close the driver.
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; This can be two different things — either CloseDeskAcc or calling the CloseOrnHook.
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;
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; This patch has been rolled into DeskMgr.a.
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;
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GetDCtlRefNumFromHandleForClosingDeskAccessory ComeFromPatchProc \
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_TrackGoAway,AfterTrackGoAwayInSystemClick,(Plus,SE,Portable,II,IIci)
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addq #4,sp ;get rid of the return address in SystemClick
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jsrOld ;call TrackGoAway, and the stack is right
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move.l d3,a0 ;put DCE handle in an address register to dereference it
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move.l (a0),d3 ;get the DCE pointer now, like the ROM expects
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jmpROM AfterTrackGoAwayInSystemClick ; rejoin the ROM, just after the TrackGoAway call
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EndProc
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;————————————————————————————————————————————————————————————————————————————————————————————————————
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End
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