WriteIoSpace64 - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// wdbgexts.h

VOID WriteIoSpace64(
  ULONG64 address,
  ULONG   data,
  PULONG  size
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-wdbgexts-writeiospace64)

WriteIoSpace64 function

Description

The WriteIoSpace64 function writes to the system I/O locations.

Parameters

address

Specifies the I/O address to write to.

data

Specifies the address of a variable that holds the data to write. This must be at least the number of bytes contained in size.

size

Specifies the address of a variable that contains the number of bytes to write. Size must be 1, 2, or 4. After the data is written, size will contain the number of bytes actually written.

Remarks

If you are writing 32-bit code, you should use WriteIoSpace instead. See 32-Bit Pointers and 64-Bit Pointers for details.

For a WdbgExts extension, include wdbgexts.h. For a DbgEng extension, include wdbgexts.h before dbgeng.h. See Writing DbgEng Extension Code for details.

View the official Windows Driver Kit DDI reference

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