Kernel debug output not shown in DebugView ( Win7 x64 )

StackOverflow https://stackoverflow.com/questions/10447039

  •  05-06-2021
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Question

I'm using DebugView 4.78 to debug output from my driver. I've used the instructions from here (option 1, setting DEFAULT value to 0xf), rebooted, but I still cannot get any debug output from my driver (driver build is chk x64 win7).

Ideas?

Edit: I found the problem, the build process in one step is copying the new .sys file to the drivers location (C:\Windows\System32\drivers), however, even though the copy operations says "1 file copied", I can see that the destination file is not updated...

Was it helpful?

Solution

As Visual Studio is 32 bit, on a 64 bit Windows it is a WOW64 process. If such a process tries to write to %WinDir%\System32\ the result will be redirected to %WinDir%\SysWOW64. By using the special alias Sysnative, you can write to %WinDir%\Sysnative, and then it will end up in %WinDir%\System32\, as intended.

See more here.

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