0:011> uf ntdll!RtlSetProcessIsCritical
ntdll!RtlSetProcessIsCritical:
77c641c1 8bff            mov     edi,edi
77c641c3 55              push    ebp
77c641c4 8bec            mov     ebp,esp
77c641c6 56              push    esi
77c641c7 8b750c          mov     esi,dword ptr [ebp+0Ch]
77c641ca 33c0            xor     eax,eax
77c641cc 3bf0            cmp     esi,eax
77c641ce 7402            je      ntdll!RtlSetProcessIsCritical+0x11 (77c641d2)

ntdll!RtlSetProcessIsCritical+0xf:
77c641d0 8806            mov     byte ptr [esi],al

ntdll!RtlSetProcessIsCritical+0x11:
77c641d2 384510          cmp     byte ptr [ebp+10h],al
77c641d5 741a            je      ntdll!RtlSetProcessIsCritical+0x30 (77c641f1)

ntdll!RtlSetProcessIsCritical+0x16:
77c641d7 648b0d18000000  mov     ecx,dword ptr fs:[18h]
77c641de 8b4930          mov     ecx,dword ptr [ecx+30h]
77c641e1 f7416800001000  test    dword ptr [ecx+68h],100000h
77c641e8 7507            jne     ntdll!RtlSetProcessIsCritical+0x30 (77c641f1)

ntdll!RtlSetProcessIsCritical+0x29:
77c641ea b8010000c0      mov     eax,0C0000001h
77c641ef eb2f            jmp     ntdll!RtlSetProcessIsCritical+0x5f (77c64220)

ntdll!RtlSetProcessIsCritical+0x30:
77c641f1 3bf0            cmp     esi,eax
77c641f3 7415            je      ntdll!RtlSetProcessIsCritical+0x49 (77c6420a)

ntdll!RtlSetProcessIsCritical+0x34:
77c641f5 50              push    eax
77c641f6 6a04            push    4
77c641f8 8d4510          lea     eax,[ebp+10h]
77c641fb 50              push    eax
77c641fc 6a1d            push    1Dh
77c641fe 6aff            push    0FFFFFFFFh
77c64200 e873b8f5ff      call    ntdll!ZwQueryInformationProcess (77bbfa78)
77c64205 8a4510          mov     al,byte ptr [ebp+10h]
77c64208 8806            mov     byte ptr [esi],al

ntdll!RtlSetProcessIsCritical+0x49:
77c6420a 0fb64508        movzx   eax,byte ptr [ebp+8]
77c6420e 6a04            push    4
77c64210 894510          mov     dword ptr [ebp+10h],eax
77c64213 8d4510          lea     eax,[ebp+10h]
77c64216 50              push    eax
77c64217 6a1d            push    1Dh
77c64219 6aff            push    0FFFFFFFFh
77c6421b e8a8b8f5ff      call    ntdll!ZwSetInformationProcess (77bbfac8)

ntdll!RtlSetProcessIsCritical+0x5f:
77c64220 5e              pop     esi
77c64221 5d              pop     ebp
77c64222 c3              ret