The SYSTEM_BIGPOOL_ENTRY structure is a recurring element in the SYSTEM_BIGPOOL_INFORMATION that a successful call to ZwQuerySystemInformation or NtQuerySystemInformation produces in its output buffer when given the information class SystemBigPoolInformation (0x42).

Documentation Status

The SYSTEM_BIGPOOL_ENTRY structure is not documented.


The SYSTEM_BIGPOOL_ENTRY is 0x0C or 0x18 bytes in 32-bit and 64-bit Windows, respectively.

Offset (x86) Offset (x64) Definition
0x00 0x00
union {
    PVOID VirtualAddress;
    ULONG_PTR NonPaged : 1;
0x04 0x08
ULONG_PTR SizeInBytes;
0x08 0x10
union {
    UCHAR Tag [4];
    ULONG TagUlong;