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Resource forks are included only for .rsrc files. These are DeRezzed into their data fork. 'ckid' resources, from the Projector VCS, are not included. The Tools directory, containing mostly junk, is also excluded.
141 lines
4.5 KiB
Plaintext
141 lines
4.5 KiB
Plaintext
;
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; File: InactiveAppleTalkOpenPatch.a
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;
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; Contains: A patch on _Open that prevents existing AppleTalk drivers Ð
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; .MPP, .ATP, .DSP, .XPP, & .AFPTranslator Ð from being opened
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; if AppleTalk is inactive, and a patch on _Gestalt to return that the 'atkv' selector is undefined. These patches are only applied if
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; AppleTalk is inactive on startup.
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;
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; Written by: Dean Yu
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;
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; Copyright: © 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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; <1> 1/19/92 DTY first checked in
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load 'StandardEqu.d'
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include 'GestaltEqu.a'
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include 'PackMacs.a'
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include 'GestaltPrivateEqu.a'
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include 'LinkedPatchMacros.a'
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kOpenTrap equ $A000
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kGestaltTrap equ $A0AD
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; ApplyOpenPatchIfAppleTalkIsInactive checks to see if Port B is configured
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; for AppleTalk use. If it is, it patches _Open, otherwise, it does nothing.
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ApplyOpenPatchIfAppleTalkIsInactive InstallProc (Plus,SE,Portable,II,IIci)
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Import DontLetAppleTalkDriversOpen
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Import UndefineGestaltAppleTalkSelector
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move.l ExpandMem,a0 ;
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tst.w ExpandMemRec.emAppleTalkInactiveOnBoot(a0) ; If AppleTalk is active, donÕt patch _Open
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bz.s @exit ; AppleTalk is active. Bail out.
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; AppleTalk is inactive. Apply the patch to _Open that prevents AppleTalk drivers
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; from being opened and the patch to _Gestalt to return gestaltUndefSelectorErr for
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; requests for the 'atkv' selector.
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move.w #kOpenTrap,d0
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_GetTrapAddress ; Get address of original _Open
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leaResident DontLetAppleTalkDriversOpen,a1 ; Get patch routine
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move.l a0,2(a1) ; Save the old _Open
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move.w #kOpenTrap,d0
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move.l a1,a0
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_SetTrapAddress ; Patch _Open
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move.w #kGestaltTrap,d0
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_GetTrapAddress ,NewOS ; Get address of original _Gestalt
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leaResident UndefineGestaltAppleTalkSelector,a1 ; Get patch routine
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move.l a0,2(a1) ; Remember real _Gestalt
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move.w #kGestaltTrap,d0
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move.l a1,a0
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_SetTrapAddress ,NewOS
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@exit
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rts
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EndProc
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; This is the _Open patch. It checks the ioNamePtr field of the parameter block in A0
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; to see if the name is of an AppleTalk driver that should not be opened. If it is,
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; _Open is not called, and notOpenErr is returned. If _Open is being called for something
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; else, the call is left alone.
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DontLetAppleTalkDriversOpen Proc Export
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bra.s PatchStart
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OldOpenAddress
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ds.l 1 ; Fixed up with address of old _Open
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PatchStart
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movem.l a0/a3-a4/d6-d7,-(sp) ; Save some registers?
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move.l ioNamePtr(a0),d0 ; Is there a name?
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bz.s @callOldOpen ; No, let this call through
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move.l d0,a3
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moveq #0,d6
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move.b (a3)+,d6 ; Save length of driver name
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cmp.b #'.',(a3) ; Driver names always being with a period.
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bne.s @callOldOpen ; If itÕs not a driver thatÕs being opened, let it through.
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lea DriversOfInterest,a4 ; Get table of drivers not to open.
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moveq #0,d7 ; Used for length of driver name in table
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@checkDriverNameLoop
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move.b (a4)+,d7 ; Check length byte
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bz.s @callOldOpen ; If 0, end of table was reached without a match. Let the driver open.
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move.l a3,a0 ; Pointer to first string
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move.l a4,a1 ; Pointer to second string
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move.w d6,d0 ; Length of first string
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swap d0
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move.w d7,d0 ; Length of second string
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_CmpString ; Are they equal?
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tst.l d0
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beq.s @dontLetThisDriverOpen ; If equal, donÕt let it open.
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add.l d7,a4 ; Point to next driver name in table.
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bra.s @checkDriverNameLoop ; And check it out.
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@dontLetThisDriverOpen
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move.w #notOpenErr,d0 ; Report an error
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movem.l (sp)+,a0/a3-a4/d6-d7
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move.w d0,ioResult(a0) ; Return the error
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tst.w d0 ; Set up the condition code
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rts ; And return to the caller
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@callOldOpen
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movem.l (sp)+,a0/a3-a4/d6-d7
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move.l OldOpenAddress,-(sp)
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rts ; Call the orginal _Open
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DriversOfInterest
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String Pascal
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dc.b '.MPP'
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dc.b '.ATP'
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dc.b '.XPP'
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dc.b '.DSP'
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dc.b '.AFPTranslator'
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dc.b 0
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ALIGN
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EndProc
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UndefineGestaltAppleTalkSelector Proc Export
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bra.s PatchStart
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OldGestaltAddress
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ds.l 1 ; Placeholder for real _Gestalt routine
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PatchStart
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cmp.w #kGestaltTrap,d1 ; Gestalt? (As opposed to _NewGestalt or _ReplaceGestalt)
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bne.s @toRealGestalt ; No.
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cmpi.l #gestaltATalkVersion,d0 ; gestaltATalkVersion?
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bne.s @toRealGestalt ; No.
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move.w #gestaltUndefSelectorErr,d0 ; Pretend this selector is undefined.
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moveq #0,a0
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rts
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@toRealGestalt
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move.l OldGestaltAddress,-(sp)
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rts ; Jump to real _Gestalt routine
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EndProc
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End |