Processor Control Region

Processor Control Region (PCR) is a Windows kernel mode data structure that contains information about the current processor. It can be accessed via the fs segment register.

Structure

In C and C++, the PCR is known as KPCR. It contains information about the current processor.

Processor Control Block

The PCR contains a substructure called Processor Control Block (KPRCB), which contains information such as CPU step and a pointer to the thread object of the current thread.

References

• http://www.nirsoft.net/kernel_struct/vista/KPCR.html
• http://www.nirsoft.net/kernel_struct/vista/KPRCB.html

See also

• Process Environment Block
• Process control block