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AOB Scanner problem

 
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Jozzef
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Location: Wales
PostPosted: Sun Mar 22, 2009 1:29 pm    Post subject: AOB Scanner problem Reply with quote
Here's the code:

Code:

int main()
{
      DWORD dwAddress = 0x00400000;
      DWORD dwLen = 0x01FFFFFF;
for(DWORD i=0; i < dwLen; i++)
{
      char *ptr = (char*)dwAddress;
      cout << (INT)*ptr << endl;
      cout << (INT)ptr << endl;
      dwAddress++;

}


For some reason at 0x4113087 the program crashes

I'm using VC++ 2008.

Most of the code is from kitterz maplestory program.

Any help wouldbe appreciated.
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dnsi0
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PostPosted: Sun Mar 22, 2009 1:34 pm    Post subject: Reply with quote
Unhandled Access Violation.
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Jozzef
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Joined: 17 Feb 2007
Posts: 34
Location: Wales
PostPosted: Sun Mar 22, 2009 2:01 pm    Post subject: Reply with quote
dnsi0 wrote:
Unhandled Access Violation.


How come this happens?

It crashes even when i'm not running maplestory.
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dnsi0
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PostPosted: Sun Mar 22, 2009 2:23 pm    Post subject: Reply with quote
You are reading non-existant memory. So no duh it crashes. add a exception handler and you will be alright.
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mStorm
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PostPosted: Sun Mar 22, 2009 2:50 pm    Post subject: Reply with quote
use VirtualQuery

MEMORY_BASIC_INFORMATION mbi;

Scan if: mbi.AllocationBase is > 0, if mbi.RegionSize is > 0, and mbi.State == MEM_COMMITED
Then you have yourself a chunk of good memory to scan.


(increment by mbi.RegionSize..)
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