ReadIoSpace64 - NtDoc
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// wdbgexts.h
VOID ReadIoSpace64(
ULONG64 address,
PULONG data,
PULONG size
);
View the official Windows Driver Kit DDI referenceNo description available.
The ReadIoSpace64 function reads from the system I/O locations.
addressSpecifies the I/O address to read from.
dataSpecifies the address of a variable to hold the data read. This must be at least the number of bytes contained in size.
sizeSpecifies the address of a variable that contains the number of bytes to read. Size must be 1, 2, or 4. After the data is read, size will contain the number of bytes actually read.
If you are writing 32-bit code, you should use ReadIoSpace instead. See 32-Bit Pointers and 64-Bit Pointers for details.
If you are writing a WdbgExts extension, include wdbgexts.h. If you are writing a DbgEng extension that calls this function, include wdbgexts.h before dbgeng.h (see Writing DbgEng Extension Code for details).