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11 ThisVCall / ThisVCallFPR4

 
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Anonymous
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Joined: 10 Feb 2008
Posts: 0

Posted: Tue Nov 19, 2002 7:27 pm     Post subject: 11 ThisVCall / ThisVCallFPR4

NumBytes: 3
ArgStr:
SrcStr:
Comments:

Runtime engine:
[asm:3re0n41c]
  1. mov   edx, [ebp-44h]                ; edx = "me"
  2. or    word ptr [edx+74h], 1         ; ?
  3. mov   ebx, [ebp+8]                  ; ebx = me.vtable (?)
  4. movzx eax, word ptr [esi]           ; eax = arg0
  5. push  ebx                           ; save me.vtable (?)
  6. cmp   _g_EventMonitorsEnabled, 0    ; if EventMonitors are enabled
  7. jnz   short lblEventMonitorsEnabled
  8. add   eax, [ebx]                    ; eax = me.vtable(arg0) (?)
  9. call  dword ptr [eax]               ; call proc at vtable
  10.  
  11. lblNextOpCode:
  12.   xor   eax, eax
  13.   mov   al, [esi+2]
  14.   add   esi, 3
  15.   jmp   ds:_tblByteDisp[eax*4]
  16.  
  17. lblEventMonitorsEnabled:
  18.   pusha
  19.   push  esp
  20.   push  eax
  21.   push  ebx
  22.   call  _VBAEventVtableCall@12        ; VBAEventVtableCall(x,x,x)
  23.   popa
  24.   add   eax, [ebx]
  25.   call  dword ptr [eax]
  26.   pusha
  27.   push  esp
  28.   call  _VBAEventProcExit@4           ; VBAEventProcExit(x)
  29.   popa
  30.   jmp   short lblNextOpCode
[/asm:3re0n41c]
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_aLfa_
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Joined: 21 Sep 2002
Posts: 233
Location: Aveiro, Portugal

Posted: Wed Mar 19, 2008 10:27 am     Post subject: Re: 11 ThisVCall / ThisVCallFPR4

Microsoft calls this ThisVCallFPR4. Can anyone help me clear up what this OpCode really does?
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