Code does not work under 64 bit Vista

Index > Windows > Code does not work under 64 bit Vista

Goto page Previous 1, 2

Author

Thread

sinsi

Joined: 10 Aug 2007
Posts: 794
Location: Adelaide

sinsi 07 Jul 2009, 02:18

Code:

FireThread: 
...
    sub ebp,12                 ; as 3 local variables 

    mov eax,nb 
    mov [ebp],eax 
    mov eax,hFShells 
    mov [ebp+4],eax 
...
    invoke FShell_render,[ebp+4],[ebp]

You use ebp but I can't see it initialised beforehand.

I get an access violation in FShell_render

Code:

    cmovz edx,ecx 
    mov edx,[edx+ebx*4]  <<<<<access violation with ebx=004dxxxx

07 Jul 2009, 02:18

Bicyclist

Joined: 06 Jul 2009
Posts: 18

Bicyclist 07 Jul 2009, 03:45

Thanks.

I did not write the code and there is a lot that I do not understand.

I did change SetThreadPriority to a lower value to run on my .386 system that is running XP Pro on a 733 Mhz processor.

Even if it can't be fixed to run on Vista, I would be curious as to why.

I tried another program that the author wrote.

It starts in a small window and runs fine.

If the window is enlarged it crashes. Smile

07 Jul 2009, 03:45

Madis731

Joined: 25 Sep 2003
Posts: 2138
Location: Estonia

Madis731 07 Jul 2009, 04:22

The fireworks work under Server 2003 x64 and even when the window is resized.
When it doesn't work on Vista x64 then probably there is some cutting of corners going on. ESP not properly aligned? XMM0 not cleared or cleared where it should have or shouldn't have been cleared. Only guessing here.

07 Jul 2009, 04:22

sinsi

Joined: 10 Aug 2007
Posts: 794
Location: Adelaide

sinsi 07 Jul 2009, 04:48

I should mention that I tested it on win7 rc x64 (vista2 as far as I'm concerned Laughing

)

07 Jul 2009, 04:48

Bicyclist

Joined: 06 Jul 2009
Posts: 18

Bicyclist 07 Jul 2009, 09:59

Madis731 wrote:

The fireworks work under Server 2003 x64 and even when the window is resized.
When it doesn't work on Vista x64 then probably there is some cutting of corners going on. ESP not properly aligned? XMM0 not cleared or cleared where it should have or shouldn't have been cleared. Only guessing here.

Thanks for the feedback.

I will put in some comments into the source code.

07 Jul 2009, 09:59

Bicyclist

Joined: 06 Jul 2009
Posts: 18

Bicyclist 07 Jul 2009, 10:15

sinsi wrote:

I should mention that I tested it on win7 rc x64 (vista2 as far as I'm concerned )

How did it run?

I used Windbg, FreeIDA, and Ollydbg 2.0.

I think I will read up on setting some breakpoints or linking it with debug info turned on.

I will also see if Vista has an Event Viewer.

It seems comical.
The program was written using Microsoft products. Smile

(Masm 6.14)

07 Jul 2009, 10:15

Bicyclist

Joined: 06 Jul 2009
Posts: 18

Bicyclist 27 Jul 2009, 23:59

bitRAKE wrote:

Works fine in WinXP 64-bit (unless I change the window size). I'm familiar with this program. First thought is possible Heap size too small. Then check threading for possible conflict. I like his spiral program, too! Modern processors run these programs WAY too fast, imho.

(Looks like there is a new version than you are using as well?
Or you changed it?)

It's funny how things work out some time.

I decided to go from Masm 6.14 to 8.0 and it told me "invalid instruction operands" for some of the lines of code.

After some searches, I found that all it took were a few additions of dword ptr. One of the lines that I changed is commented with the change made.

27 Jul 2009, 23:59

Goto page Previous 1, 2

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum