[tkreuzer] 37425: Implement RtlGetCallersAddress

Author: tkreuzer
Date: Mon Nov 17 17:24:59 2008
New Revision: 37425

URL: http://svn.reactos.org/svn/reactos?rev=37425&view=rev
Log:
Implement RtlGetCallersAddress

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/rt...
==============================================================================
--- 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 17:24:59 2008
@@ -332,7 +332,7 @@
 {
     CONTEXT Context;
     ULONG64 ControlPc, ImageBase, EstablisherFrame;
-    ULONG64 StackBegin, StackEnd;
+    ULONG64 StackLow, StackHigh;
     PVOID HandlerData;
     INT i;
     PRUNTIME_FUNCTION FunctionEntry;
@@ -341,7 +341,7 @@

ControlPc = Context.Rip;

-    RtlpGetStackLimits(&StackBegin, &StackEnd);
+    RtlpGetStackLimits(&StackLow, &StackHigh);

/* Check if we want the user-mode stack frame */
     if (Flags == 1)
@@ -384,3 +384,29 @@
     return i;
 }

+// CHEKCME: return PVOID?
+// http://undocumented.ntinternals.net/UserMode/Undocumented%20Functions/Debug/...
+VOID
+NTAPI
+RtlGetCallersAddress(
+    OUT PVOID *CallersAddress,
+    OUT PVOID *CallersCaller )
+{
+    PVOID Callers[4];
+    ULONG Number;
+
+    /* Get callers:
+     * RtlWalkFrameChain -> RtlGetCallersAddress -> x -> y */
+    Number = RtlWalkFrameChain(Callers, 4, 0);
+
+    if (CallersAddress)
+    {
+        *CallersAddress = (Number >= 3) ? Callers[2] : NULL;
+    }
+    if (CallersCaller)
+    {
+        *CallersCaller = (Number == 4) ? Callers[3] : NULL;
+    }
+
+    return;
+}