From: Christian Inci <chris.wine@broke-the-inter.net>
Subject: [PATCH] ntdll: Zero DR7 if it's an int3 exception
Message-Id: <d33333c9-0f28-315f-71cc-5f2bcf350dcc@broke-the-inter.net>
Date: Wed, 5 Apr 2017 18:43:49 +0200

This will fix the game crash issue of #32515.

The other parts of the original patch seem unnecessary, they only handle the issue that the reserved bits of DR6/DR7 are being unset for whatever reasons.

Signed-off-by: Christian Inci <chris.wine@broke-the-inter.net>

diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index 59dca6cf..9514676b 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -1126,7 +1126,10 @@ static inline void save_context( CONTEXT *context, const ucontext_t *sigcontext,
     context->Dr2          = regs->dr2;
     context->Dr3          = regs->dr3;
     context->Dr6          = regs->dr6;
-    context->Dr7          = regs->dr7;
+    if (get_trap_code(sigcontext) != TRAP_x86_BPTFLT) /* zero it if it's a Breakpoint exception */
+        context->Dr7          = regs->dr7;
+    else
+        context->Dr7          = 0;
 
     if (fpu)
     {