Why kernel32 in x64

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Hotwire

Joined: 17 Sep 2015
Posts: 18

Hotwire 23 Dec 2021, 20:59

Hello there!

I wonder why one should import kernel32.dll, user32.dll, etc. for x64 applications?
These have both versions of functions 32 and 64? Or operating system does something to make it work compensating the difference in calling convention?

23 Dec 2021, 20:59

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20630
Location: In your JS exploiting you and your system

revolution 23 Dec 2021, 22:23

It is a long story.

MS kept the '*32' naming for compatibility with "bad" applications that hardcoded the names into the source.

23 Dec 2021, 22:23

Furs

Joined: 04 Mar 2016
Posts: 2625

Furs 24 Dec 2021, 13:33

Hotwire wrote:

Hello there!

I wonder why one should import kernel32.dll, user32.dll, etc. for x64 applications?
These have both versions of functions 32 and 64? Or operating system does something to make it work compensating the difference in calling convention?

Just because it's called kernel32 doesn't mean it's not a different 64-bit DLL.

24 Dec 2021, 13:33

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