115 lines
2.4 KiB
NASM
115 lines
2.4 KiB
NASM
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TITLE WOWDEB.ASM
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PAGE ,132
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;
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; WOW v1.0
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;
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; Copyright (c) 1991, Microsoft Corporation
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;
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; wowdeb.ASM
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; Debug Routines
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;
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; History:
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; 19-June-91 Matt Felton (mattfe) Created
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;
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.xlist
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include kernel.inc
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include cmacros.inc
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.list
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.286p
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externFP WOWKernelTrace
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DataBegin
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externW curTDB
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DataEnd
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sBegin CODE
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assumes CS,CODE
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assumes DS,NOTHING
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assumes ES,NOTHING
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;-----------------------------------------------------------------------;
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; KdDbgOut ;
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; ;
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; Cmacros.inc has been modified so in the debug kernel all far public ;
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; routines have a preamble compiled so they call this routine with a ;
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; a count of the number of arguements and a pointer to a charater string;
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; with the name of the routine. ;
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; This routine then thunks to 32 bit WOW to output the paramters to the ;
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; log. ;
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; It assumes that if the callers CS != Our CS then its not the kernel ;
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; Calling this routine ;
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; Cmacros doesn't compile in the preamble for some internal routines ;
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; that are called all the time. ;
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; For retail Kernel the preamble and this routine are omitted. ;
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; ;
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; Arguments: ;
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; lpStr long pointer to null terminated string ;
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; cparms count of parameters ;
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; Returns: ;
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; none ;
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; ;
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; Error Returns: ;
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; ;
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; Registers Preserved: ;
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; all ;
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; ;
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; Registers Destroyed: ;
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; WOWKernelTrace Thunk to 32 bits ;
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; ;
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; History: ;
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; ;
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; June 19 1991 Create Matt Felton [mattfe]
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;-----------------------------------------------------------------------;
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ifdef KDEBUG
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assumes ds, nothing
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assumes es, nothing
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cProc KdDbgOut,<PUBLIC,FAR>,<ax,bx,dx>
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parmW cParms
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parmD lpRoutineName
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cBegin
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SetKernelDS DS
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mov ax,curTDB ; if there is no CurrentTDB forget it.
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cmp ax,0
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jz KdDbgOut_Exit
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; Get the iLogLevel From ROMBIOS Hard Disk Area
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push 0040h
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pop ds
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UnSetKernelDS ds
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iLogLevel equ 0042h ; use fixed disk status area
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cmp word ptr ds:[iLogLevel],"00" ;No Output if Zero
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jz KdDbgOut_Exit
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; Log Application Calls Only
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mov ax,cs
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mov bx,word ptr [bp] ; (follow BP chain to user CS)
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add bx,3
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cmp word ptr ds:[iloglevel],"61" ; LOG IT ALL at Level 16
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jz @f
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cmp ax,word ptr ss:[bx] ;If Users CS != KERNEL CS
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jz KdDbgOut_Exit ; then ignore tracing
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@@:
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sub bx,2 ; Point to Callers Return Address IP:CS Args
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cCall WOWKernelTrace,<lpRoutineName,cParms,SSBX>
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KdDbgOut_Exit:
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cEnd
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endif
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sEND CODE
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end
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