Geoff Chappell, Software Analyst
The SYSTEM_INTERRUPT_INFORMATION structure is produced in the output buffer by a successful call to the following functions:
when given the information class SystemInterruptInformation (0x17).
The SYSTEM_INTERRUPT_INFORMATION structure is defined in WINTERNL.H from the Software Development Kit (SDK). The definition there has the whole structure as one array of bytes, named Reserved1. Documentation of NtQuerySystemInformation describes the structure as “opaque” and suggests that whatever is produced in it for the SystemInterruptInformation case “can be used to generate an unpredictable seed for a random number generator.”
The SYSTEM_INTERRUPT_INFORMATION is 0x18 bytes in both 32-bit and 64-bit Windows.