PUSH/POP Problem

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Overflowz

Joined: 03 Sep 2010
Posts: 1046

Overflowz 25 Sep 2010, 08:04

I mean without itoa.. I've tried this code but doesn't seems to work. something like

Code:

asdf db 10
mov dword [asdf],ecx

but I get smile icons or something like that instead of 1, 2, 3, 4.. isn't there any way like this ?

25 Sep 2010, 08:04

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19116
Location: In your JS exploiting you and your system

revolution 25 Sep 2010, 08:09

Overflowz wrote:

I mean without itoa.. I've tried this code but doesn't seems to work. something like
Code:
asdf db 10
mov dword [asdf],ecx    
but I get smile icons or something like that instead of 1, 2, 3, 4.. isn't there any way like this ?

The CPU does not have any instruction for converting a binary number into ASCII text.

25 Sep 2010, 08:09

Overflowz

Joined: 03 Sep 2010
Posts: 1046

Overflowz 25 Sep 2010, 08:21

Ok. I'll think something like that later. Thanks for reply. Smile

25 Sep 2010, 08:21

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 25 Sep 2010, 08:55

revolution wrote:

The CPU does not have any instruction for converting a binary number into ASCII text.

Well, it have fbstp. The rest is almost trivial. Wink

25 Sep 2010, 08:55

Overflowz

Joined: 03 Sep 2010
Posts: 1046

Overflowz 25 Sep 2010, 09:44

Can you write little example of that please ? Razz

25 Sep 2010, 09:44

Overflowz

Joined: 03 Sep 2010
Posts: 1046

Overflowz 25 Sep 2010, 09:51

I'll make new thread. with apposite name.

25 Sep 2010, 09:51

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19116
Location: In your JS exploiting you and your system

revolution 25 Sep 2010, 10:31

baldr wrote:

revolution wrote:
The CPU does not have any instruction for converting a binary number into ASCII text.
Well, it have fbstp. The rest is almost trivial.

I not so sure that BCD to ASCII conversion would be any easier than direct binary to ASCII.

25 Sep 2010, 10:31

Nameless

Joined: 30 Apr 2010
Posts: 95

Nameless 25 Sep 2010, 13:07

@windwakr: mannnnnnnnn............. I LOVE YOUR COMMENTING <3

another API for the stubborn Razz

Code:

invoke wsprintf, itdb, "%d", eax

25 Sep 2010, 13:07

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19116
Location: In your JS exploiting you and your system

revolution 25 Sep 2010, 13:11

Nameless wrote:

@windwakr: mannnnnnnnn............. I LOVE YOUR COMMENTING <3

another API for the stubborn
Code:
invoke wsprintf, itdb, "%d", eax
    

wsprintf is also a cdecl function. You need to use cinvoke there also.

25 Sep 2010, 13:11

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 25 Sep 2010, 13:44

revolution wrote:

I not so sure that BCD to ASCII conversion would be any easier than direct binary to ASCII.

Consider these:

Sign is already isolated.
You can do it bytewise.
It can handle up to 64 bits at once.

Not the fastest, probably.

25 Sep 2010, 13:44

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19116
Location: In your JS exploiting you and your system

revolution 25 Sep 2010, 13:56

The odd/even nibble thing and the leading zero detection are tricky to get right.

25 Sep 2010, 13:56

Overflowz

Joined: 03 Sep 2010
Posts: 1046

Overflowz 25 Sep 2010, 14:16

Yeh, I need stdcall function only Sad

25 Sep 2010, 14:16

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19116
Location: In your JS exploiting you and your system

revolution 25 Sep 2010, 14:35

Overflowz: Is this your homework?

25 Sep 2010, 14:35

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