C / C++ / MFC

Rajkumar_R wrote:

please try this on VS2005 and erase "by the looks of things". In VC6 I get EIP as NULL, hence this bahaviour is not because of CPU dependency. Clearly, depends on platform(sw/hw) that I specified explicitly in my first post

<br />
wish to get into a function which is not normally called by the function. <br />

tom groezer wrote:

get into a function which is not normally called by the function

#pragma optimize( "y", off )	// Make sure we have standard stack frames.
				// This is important because of how we dig the
				// return address out of the stack frame.
void ExportedFunction()
{
	// Get the return address.
	LPCVOID pReturnAddress;
	__asm
	{
		mov eax, [ebp+4]
		mov pReturnAddress, eax
	}
 
	// Find the HMODULE from the return address.
	MEMORY_BASIC_INFORMATION mbi;
	DWORD res = VirtualQuery(pReturnAddress, &mbi, sizeof(mbi));
	if (res!=sizeof(mbi))
	{
		return; // Error!
	}
	HMODULE hModCaller = reinterpret_cast<HMODULE>(mbi.AllocationBase);
 
	// Get the name of the calling module.
	char ModName[MAX_PATH];
	if ( GetModuleFileName(hModCaller, ModName, MAX_PATH) )
	{
		// Output the calling module's name.
		MessageBox(NULL, ModName, "Calling module's name is", MB_OK);
	}
}
#pragma optimize( "", on ) 		// Reset to default.