Comments on: When DEP strikes back

By: Christian Wimmer

Christian Wimmer — Tue, 28 Apr 2009 19:50:50 +0000

A user can activate DEP for services or all processes in System control panel.

How is DEP getting important?

By: Sam Johnson

Sam Johnson — Tue, 28 Apr 2009 04:15:45 +0000

How do you compile in Delphi so that DEP is enabled in your exe ?

This is getting pretty important….

By: PngImageList Fix for DEP and Update for D2009 - Arvid’s Blog @ digivendo

PngImageList Fix for DEP and Update for D2009 - Arvid’s Blog @ digivendo — Sun, 26 Oct 2008 13:24:55 +0000

[...] for some years now Christian of the JEDI Windows API Team was the first to write about it in his blog [...]

By: Arvid Winkelsdorf

Arvid Winkelsdorf — Thu, 16 Oct 2008 14:08:13 +0000

I was aware of this issue since Delphi 2006 and I have always been able to circumvent the given DEP & IDE issue by using a combined design and runtime package.

@Mitja: Thank you for pointing out the right solution! I just confirmed this to be working for Delphi 2006 and 2009. Without both IDEs crash when DEP is turned on and a TPNGImageList is used.

By: Mitja P.

Mitja P. — Wed, 15 Oct 2008 15:25:52 +0000

There is a function PatchPtr used in PngComponents unit PngImageList that needs a change of VirtualProtect to PAGE_EXECUTE_READWRITE instead of only PAGE_READWRITE if I remember correctly. I am also not sure if I reported this to the author at the time I was playing around with this components or not.

By: Christian Wimmer

Christian Wimmer — Tue, 14 Oct 2008 11:01:26 +0000

It is very hard to answer (at least for me) your questions.
Further investigations are necessary. However in my opinion the problem is PNGComponents because the fellow programmer used many other components without problem.

By: Lars Fosdal

Lars Fosdal — Tue, 14 Oct 2008 07:14:33 +0000

My question is: Was the data execution intentionally done in the source code, or was it automatically generated by the Delphi compiler?

I.e. Is or is not Delphi by default, safe for DEP ?