HalBuildMdlFromScatterGatherListV3

__int64 __fastcall HalBuildMdlFromScatterGatherListV3(__int64 a1, unsigned int *a2, struct _MDL *a3, struct _MDL **a4){
  __int64 v8; 
  struct _MDL *v9; 
  unsigned int v10; 
  unsigned int *v11; 
  unsigned int v12; 
  unsigned int v13; 
  struct _MDL *v14; 
  _QWORD *p_Next; 
  int v16; 
  ULONG v17; 
  char v18; 
  unsigned int *v19; 
  unsigned int v20; 
  PMDL Mdl; 
  PMDL v22; 
  struct _MDL *Next; 
  struct _MDL *v24; 
  int v25; 
  struct _MDL *v26; 
  char v27; 
  __int64 v28; 
  unsigned __int64 v29; 
  __int64 v30; 
  _MDL *v31; 
  unsigned __int64 v32; 
  __int64 v33; 
  unsigned int v34; 
  unsigned int v35; 
  unsigned int v36; 
  unsigned int *v37; 
  unsigned int v38; 
  unsigned int v39; 
  if( !a3 )
    return 3221225485i64;
  if( *(_DWORD *)(a1 + 512) == 2 )
  {
    if( !*(_BYTE *)(a1 + 437) )
      return 3221225474i64;
    goto LABEL_8;
  }
  if( !*(_BYTE *)(a1 + 432) && *(_BYTE *)(a1 + 437) )
  {
LABEL_8:
    *a4 = a3;
    return 0i64;
  }
  v8 = *((_QWORD *)a2 + 1);
  if( v8 )
    v9 = *(struct _MDL **)(v8 + 16);
  else
    v9 = *(struct _MDL **)(a1 + 544);
  if( v9 )
  {
    *a4 = v9;
    return 0i64;
  }
  v10 = *a2;
  v11 = a2 + 4;
  v12 = 0;
  v37 = a2 + 4;
  v13 = 0;
  v38 = 0;
  v14 = 0i64;
  v34 = v10;
  p_Next = 0i64;
  v39 = 0;
  v16 = 0;
  v17 = 0;
  v18 = 1;
  v19 = a2 + 4;
  if( !v10 )
  {
LABEL_34:
    v24 = v14 + 1;
    v25 = 0;
    v26 = v14;
    v27 = 1;
    if( *a2 )
    {
      v28 = *a2;
      do
      {
        v29 = *(_QWORD *)v11;
        v30 = v11[2];
        if( !v27 && (v25 || (v29 & 0xFFF) != 0) )
        {
          v26 = v26->Next;
          v24 = v26 + 1;
        }
        v31 = (_MDL *)(v29 >> 12);
        v32 = ((*(_QWORD *)v11 & 0xFFFui64) + v30 + 4095) >> 12;
        if( (_DWORD)v32 )
        {
          v33 = (unsigned int)v32;
          do
          {
            v24->Next = v31;
            v24 = (struct _MDL *)((char *)v24 + 8);
            v31 = (_MDL *)((char *)v31 + 1);
            --v33;
          }
          while( v33 );
        }
        v27 = 0;
        v25 = (v29 + v30) & 0xFFF;
        v11 += 6;
        --v28;
      }
      while( v28 );
    }
    *a4 = v14;
    if( v8 )
      *(_QWORD *)(v8 + 16) = v14;
    else
      *(_QWORD *)(a1 + 544) = v14;
    return 0i64;
  }
  do
  {
    v35 = v19[2];
    v36 = *v19;
    v20 = *v19 & 0xFFF;
    if( !v18 && (v16 || v20) )
    {
      Mdl = IoAllocateMdl((PVOID)v12, v17, 1u, 0, 0i64);
      if( !Mdl )
        goto LABEL_28;
      Mdl->MdlFlags |= 0x2802u;
      if( v14 )
        *p_Next = Mdl;
      else
        v14 = Mdl;
      v12 = v38;
      p_Next = &Mdl->Next;
      v19 = v37;
      v17 = 0;
      v10 = v34;
      v13 = v39;
    }
    v18 = 0;
    if( v17 )
      v20 = v12;
    v17 += v35;
    v19 += 6;
    v12 = v20;
    ++v13;
    v38 = v20;
    v16 = (v35 + v36) & 0xFFF;
    v37 = v19;
    v39 = v13;
  }
  while( v13 < v10 );
  if( !v17 )
    goto LABEL_34;
  v22 = IoAllocateMdl((PVOID)v20, v17, 1u, 0, 0i64);
  if( v22 )
  {
    v22->MdlFlags |= 0x2802u;
    if( v14 )
      *p_Next = v22;
    else
      v14 = v22;
    goto LABEL_34;
  }
LABEL_28:
  if( v14 )
  {
    do
    {
      Next = v14->Next;
      IoFreeMdl(v14);
      v14 = Next;
    }
    while( Next );
  }
  return 3221225626i64;
}

Referenced by: