Exception handler causes access violation at Login screen

[noctural]

Hello all,
I manually inject a dll(thanks Cypher for your injector) that adds a VEH and sets a DR. The problem I'm having is that the login screen seems to remove permissions so that now WoW crashes with an access violation if my dll is injected and I'm at the login screen. I believe I read in another thread that since 3.3.5, there's additional protection during login to prevent keyloggers.

Would someone be willing to point me in the right direction to resolve this? I'm not actually even sure if the access violation is due to the DR being set, the VEH or the fact that a dll is injected. Thanks for your time

[XTZGZoReX]

http://www.mmowned.com/forums/world-...nti-debug.html

[noctural]

Thanks! So I guess if I make my VEH CONTINUE_SEARCH when dr6 has no useful information, then I should be good to go. I'll give that a shot when I get home from work Thanks again.

---------- Post added at 04:10 PM ---------- Previous post was at 03:27 PM ----------

For anyone that's interested.. here's how I resolved my problem.

#define DR6_RESERVED (0xFFFF0FF0)

ULONG SpiffyHandler(PEXCEPTION_POINTERS exc)
{
	if ((exc->ExceptionRecord->ExceptionCode != STATUS_SINGLE_STEP) || 
		(exc->ExceptionRecord->ExceptionCode == STATUS_SINGLE_STEP && !(exc->ContextRecord->Dr6 & (~DR6_RESERVED))))
	{
		return (EXCEPTION_CONTINUE_SEARCH);
	}
}

[noctural]

Ah hell, it only resolved the 0xF1 exception. Now there's another:


Fault Module Name: StackHash_abcc
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c00000fd
Exception Offset: 737ce2c4

Any thoughts on this one?