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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16839
Location: In your JS exploiting you and your system
revolution
bitRAKE wrote:
Will windows always restore the process EBX before calling other threads within the process, and WndProcs?
EBX, ESI, EDI and EBP are all safe to use without fear of corruption in Windows API calls.
Post 20 Dec 2007, 17:56
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bitRAKE



Joined: 21 Jul 2003
Posts: 2796
Location: dank orb
bitRAKE
But you are assuming EBX will be zero at the start of a callback routine.

Edit: this is not true - my mistake. Embarassed


Last edited by bitRAKE on 20 Dec 2007, 18:09; edited 1 time in total
Post 20 Dec 2007, 17:58
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16839
Location: In your JS exploiting you and your system
revolution
bitRAKE wrote:
But you are assuming EBX will be zero at the start of a callback routine.
Oh, callbacks are not included in the above. EBX could be anything during a callback.
Post 20 Dec 2007, 18:02
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codegrinder



Joined: 12 Dec 2005
Posts: 20
Location: Moldova
codegrinder
bitRAKE wrote:
I noticed you use EBX for 0 throughout the program. I don't know if this is a good assumption. Will windows always restore the process EBX before calling other threads within the process, and WndProcs? It is not my understanding that this is true, nor does the calling convention imply it would be so.

Windows preserves ebx, esi and edi registers (edit: and ebp of course). Don't know why is this, but this is true even for Win95. Don't have 64 bit Windows (and 64 bit machine) to test this, almost sure it also does this thing (after seeing Win64 examples from fasm packages). I think this is some C/C++ compiler internal agreement.
Post 20 Dec 2007, 21:30
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codegrinder



Joined: 12 Dec 2005
Posts: 20
Location: Moldova
codegrinder
I asked my friend who have got 64 bit PC to help me and we made something like ICQ debugging Smile. Looks like we found where the CPU time is consumed (this was in a loop of testing if file is fragmented), but the problem with exiting still exists. Here is version.


Description:
Download
Filename: defrag.zip
Filesize: 10.69 KB
Downloaded: 364 Time(s)

Post 21 Dec 2007, 00:34
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Dopefish



Joined: 18 Nov 2007
Posts: 10
Dopefish
This is actually pretty cool and simple. Has there been any progress to this project since your last post?
Post 11 Feb 2008, 12:58
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