kd> u 83c55300 L80
nt!KiFastCallEntry:
83c55300 b923000000 mov ecx,23h
83c55305 6a30 push 30h
83c55307 0fa1 pop fs
83c55309 8ed9 mov ds,cx
83c5530b 8ec1 mov es,cx
83c5530d 648b0d40000000 mov ecx,dword ptr fs:[40h]
83c55314 8b6104 mov esp,dword ptr [ecx+4]
83c55317 6a23 push 23h
83c55319 52 push edx
83c5531a 9c pushfd
83c5531b 6a02 push 2
83c5531d 83c208 add edx,8
83c55320 9d popfd
83c55321 804c240102 or byte ptr [esp+1],2
83c55326 6a1b push 1Bh
83c55328 ff350403dfff push dword ptr ds:[0FFDF0304h]
83c5532e 6a00 push 0
83c55330 55 push ebp
83c55331 53 push ebx
83c55332 56 push esi
83c55333 57 push edi
83c55334 648b1d1c000000 mov ebx,dword ptr fs:[1Ch]
83c5533b 6a3b push 3Bh
83c5533d 8bb324010000 mov esi,dword ptr [ebx+124h]
83c55343 ff33 push dword ptr [ebx]
83c55345 c703ffffffff mov dword ptr [ebx],0FFFFFFFFh
83c5534b 8b6e28 mov ebp,dword ptr [esi+28h]
83c5534e 6a01 push 1
83c55350 83ec48 sub esp,48h
83c55353 81ed9c020000 sub ebp,29Ch
83c55359 c6863a01000001 mov byte ptr [esi+13Ah],1
83c55360 3bec
cmp
ebp,esp
83c55362 7597 jne nt!KiFastCallEntry2+0x49 (83c552fb)
83c55364 83652c00 and dword ptr [ebp+2Ch],0
83c55368 f64603df
test
byte ptr [esi+3],0DFh
83c5536c 89ae28010000 mov dword ptr [esi+128h],ebp
83c55372 0f8538feffff jne nt!Dr_FastCallDrSave (83c551b0)
83c55378 8b5d60 mov ebx,dword ptr [ebp+60h]
83c5537b 8b7d68 mov edi,dword ptr [ebp+68h]
83c5537e 89550c mov dword ptr [ebp+0Ch],edx
83c55381 c74508000ddbba mov dword ptr [ebp+8],0BADB0D00h
83c55388 895d00 mov dword ptr [ebp],ebx
83c5538b 897d04 mov dword ptr [ebp+4],edi
83c5538e fb sti
83c5538f 8bf8 mov edi,eax
83c55391 c1ef08 shr edi,8
83c55394 83e710 and edi,10h
83c55397 8bcf mov ecx,edi
83c55399 03bebc000000 add edi,dword ptr [esi+0BCh]
83c5539f 8bd8 mov ebx,eax
83c553a1 25ff0f0000 and eax,0FFFh
83c553a6 3b4708
cmp
eax,dword ptr [edi+8]
83c553a9 0f8333fdffff jae nt!KiBBTUnexpectedRange (83c550e2)
83c553af 83f910
cmp
ecx,10h
83c553b2 751a jne nt!KiFastCallEntry+0xce (83c553ce)
83c553b4 8b8e88000000 mov ecx,dword ptr [esi+88h]
83c553ba 33f6 xor esi,esi
83c553bc 0bb1700f0000 or esi,dword ptr [ecx+0F70h]
83c553c2 740a je nt!KiFastCallEntry+0xce (83c553ce)
83c553c4 52 push edx
83c553c5 50 push eax
83c553c6 ff154ca9d783 call dword ptr [nt!KeGdiFlushUserBatch (83d7a94c)]
83c553cc 58 pop eax
83c553cd 5a pop edx
83c553ce 64ff05b0060000 inc dword ptr fs:[6B0h]
83c553d5 8bf2 mov esi,edx
83c553d7 33c9 xor ecx,ecx
83c553d9 8b570c mov edx,dword ptr [edi+0Ch]
83c553dc 8b3f mov edi,dword ptr [edi]
83c553de 8a0c10 mov cl,byte ptr [eax+edx]
83c553e1 8b1487 mov edx,dword ptr [edi+eax*4]
83c553e4 2be1 sub esp,ecx
83c553e6 c1e902 shr ecx,2
83c553e9 8bfc mov edi,esp
83c553eb 3b351ca7d783
cmp
esi,dword ptr [nt!MmUserProbeAddress (83d7a71c)]
83c553f1 0f832e020000 jae nt!KiSystemCallExit2+0xa5 (83c55625)
83c553f7 f3a5 rep movs dword ptr es:[edi],dword ptr [esi]
83c553f9 f6456c01
test
byte ptr [ebp+6Ch],1
83c553fd 7416 je nt!KiFastCallEntry+0x115 (83c55415)
83c553ff 648b0d24010000 mov ecx,dword ptr fs:[124h]
83c55406 8b3c24 mov edi,dword ptr [esp]
83c55409 89993c010000 mov dword ptr [ecx+13Ch],ebx
83c5540f 89b92c010000 mov dword ptr [ecx+12Ch],edi
83c55415 8bda mov ebx,edx
83c55417 f6058878d48340
test
byte ptr [nt!PerfGlobalGroupMask+0x8 (83d47888)],40h
83c5541e 0f954512 setne byte ptr [ebp+12h]
83c55422 0f858c030000 jne nt!KiServiceExit2+0x17b (83c557b4)
83c55428 ffd3 call ebx
83c5542a f6456c01
test
byte ptr [ebp+6Ch],1
83c5542e 7434 je nt!KiFastCallEntry+0x164 (83c55464)
83c55430 8bf0 mov esi,eax
83c55432 ff156831c183 call dword ptr [nt!_imp__KeGetCurrentIrql (83c13168)]
83c55438 0ac0 or al,al
83c5543a 0f853b030000 jne nt!KiServiceExit2+0x142 (83c5577b)
83c55440 8bc6 mov eax,esi
83c55442 648b0d24010000 mov ecx,dword ptr fs:[124h]
83c55449 f68134010000ff
test
byte ptr [ecx+134h],0FFh
83c55450 0f8543030000 jne nt!KiServiceExit2+0x160 (83c55799)
83c55456 8b9184000000 mov edx,dword ptr [ecx+84h]
83c5545c 0bd2 or edx,edx
83c5545e 0f8535030000 jne nt!KiServiceExit2+0x160 (83c55799)
83c55464 8be5 mov esp,ebp
83c55466 807d1200
cmp
byte ptr [ebp+12h],0
83c5546a 0f8550030000 jne nt!KiServiceExit2+0x187 (83c557c0)
83c55470 648b0d24010000 mov ecx,dword ptr fs:[124h]
83c55477 8b553c mov edx,dword ptr [ebp+3Ch]
83c5547a 899128010000 mov dword ptr [ecx+128h],edx
nt!KiServiceExit:
83c55480 fa cli
83c55481 f6457202
test
byte ptr [ebp+72h],2
83c55485 7506 jne nt!KiServiceExit+0xd (83c5548d)
83c55487 f6456c01
test
byte ptr [ebp+6Ch],1
83c5548b 7467 je nt!KiServiceExit+0x74 (83c554f4)
83c5548d 648b1d24010000 mov ebx,dword ptr fs:[124h]
83c55494 f6430202
test
byte ptr [ebx+2],2
83c55498 7408 je nt!KiServiceExit+0x22 (83c554a2)
83c5549a 50 push eax
83c5549b 53 push ebx
83c5549c e8a4dc0900 call nt!KiCopyCounters (83cf3145)
83c554a1 58 pop eax
83c554a2 c6433a00 mov byte ptr [ebx+3Ah],0
83c554a6 807b5600
cmp
byte ptr [ebx+56h],0
83c554aa 7448 je nt!KiServiceExit+0x74 (83c554f4)
83c554ac 8bdd mov ebx,ebp
83c554ae 894344 mov dword ptr [ebx+44h],eax
83c554b1 c743503b000000 mov dword ptr [ebx+50h],3Bh
83c554b8 c7433823000000 mov dword ptr [ebx+38h],23h
83c554bf c7433423000000 mov dword ptr [ebx+34h],23h
83c554c6 c7433000000000 mov dword ptr [ebx+30h],0