<s>
Processor	B-Device
Control	I-Device
Region	I-Device
(	O
PCR	O
)	O
is	O
a	O
Windows	B-Application
kernel	O
mode	O
data	B-General_Concept
structure	I-General_Concept
that	O
contains	O
information	O
about	O
the	O
current	O
processor	B-General_Concept
.	O
</s>
<s>
It	O
can	O
be	O
accessed	O
via	O
the	O
fs	O
segment	B-General_Concept
register	I-General_Concept
on	O
x86	O
versions	O
,	O
or	O
the	O
gs	O
segment	B-General_Concept
register	I-General_Concept
on	O
x64	O
versions	O
respectively	O
.	O
</s>
<s>
In	O
Windows	B-Application
,	O
the	O
PCR	O
is	O
known	O
as	O
KPCR	O
.	O
</s>
<s>
It	O
contains	O
information	O
about	O
the	O
current	O
processor	B-General_Concept
.	O
</s>
<s>
The	O
PCR	O
contains	O
a	O
substructure	O
called	O
Processor	B-General_Concept
Control	O
Block	O
(	O
KPRCB	O
)	O
,	O
which	O
contains	O
information	O
such	O
as	O
CPU	O
step	O
and	O
a	O
pointer	O
to	O
the	O
thread	O
object	O
of	O
the	O
current	O
thread	O
.	O
</s>
