[tkreuzer] 37428: RtlWalkFrameChain: - stop when we leave the stack or Rip gets 0

Author: tkreuzer
Date: Mon Nov 17 18:39:39 2008
New Revision: 37428

URL: http://svn.reactos.org/svn/reactos?rev=37428&view=rev
Log:
RtlWalkFrameChain:
- stop when we leave the stack or Rip gets 0

Modified:
    branches/ros-amd64-bringup/reactos/lib/rtl/amd64/unwind.c

Modified: branches/ros-amd64-bringup/reactos/lib/rtl/amd64/unwind.c
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/lib/r…
==============================================================================
--- branches/ros-amd64-bringup/reactos/lib/rtl/amd64/unwind.c [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/lib/rtl/amd64/unwind.c [iso-8859-1] Mon Nov 17
18:39:39 2008
@@ -336,11 +336,14 @@
     PVOID HandlerData;
     INT i;
     PRUNTIME_FUNCTION FunctionEntry;
-DPRINT1("RtlWalkFrameChain called\n");
+
+    DPRINT("Enter RtlWalkFrameChain\n");
+
+    /* Capture the current Context */
     RtlCaptureContext(&Context);
-
     ControlPc = Context.Rip;
 
+    /* Get the stack limits */
     RtlpGetStackLimits(&StackLow, &StackHigh);
 
     /* Check if we want the user-mode stack frame */
@@ -374,13 +377,24 @@
             DPRINT("normal funtion, new Rip = %p, new Rsp = %p\n",
(PVOID)Context.Rip, (PVOID)Context.Rsp);
         }
 
+        /* Check if new Rip is valid */
+        if (!Context.Rip)
+        {
+            break;
+        }
+
+        /* Check, if we have left our stack */
+        if ((Context.Rsp < StackLow) || (Context.Rsp > StackHigh))
+        {
+            break;
+        }
+
+        /* Save this frame and continue with new Rip */
         ControlPc = Context.Rip;
-        /* Save this frame */
-
         Callers[i] = (PVOID)ControlPc;
-
-    }
-
+    }
+
+    DPRINT("RtlWalkFrameChain returns %ld\n", i);
     return i;
 }