- Fix KdpSetCommonSTate to clear breakpoints.

- Allow KdpReadVirtualMemory to read SharedUserData since it's now readable.
- Allow it to read user-mode pointers as well, just not null-pointers.
- Fix KdpReportExceptionStateChange by implementing DumpTraceData. Now the crash in ndis.sys gets caught.
- Next up: implement breakpoints so that stepping out works.

svn path=/trunk/; revision=25997

reactos/ntoskrnl/include/internal/kd64.h

@@ -221,6 +221,13 @@ KdpDeleteBreakpoint(
     IN ULONG BpEntry
 );
 
+BOOLEAN
+NTAPI
+KdpDeleteBreakpointRange(
+    IN PVOID Base,
+    IN PVOID Limit
+);
+
 //
 // Global KD Data
 //
@@ -262,3 +269,5 @@ extern BOOLEAN KdpOweBreakpoint;
 extern BOOLEAN BreakpointsSuspended;
 extern ULONG KdpNumInternalBreakpoints;
 extern ULONG KdpCurrentSymbolStart, KdpCurrentSymbolEnd;
+extern ULONG TraceDataBuffer[40];
+extern ULONG TraceDataBufferPosition;

reactos/ntoskrnl/kd64/kdapi.c

@@ -14,6 +14,21 @@
 
 /* PRIVATE FUNCTIONS *********************************************************/
 
+VOID
+NTAPI
+DumpTraceData(IN PSTRING TraceData)
+{
+    /* Update the buffer */
+    TraceDataBuffer[0] = TraceDataBufferPosition;
+
+    /* Setup the trace data */
+    TraceData->Length = TraceDataBufferPosition * sizeof(ULONG);
+    TraceData->Buffer = (PCHAR)TraceDataBuffer;
+
+    /* Reset the buffer location */
+    TraceDataBufferPosition = 1;
+}
+
 VOID
 NTAPI
 KdpGetStateChange(IN PDBGKD_MANIPULATE_STATE64 State,
@@ -87,13 +102,10 @@ KdpSetCommonState(IN ULONG NewState,
     WaitStateChange->ControlReport.InstructionCount = InstructionCount;
 
     /* Clear all the breakpoints in this region */
-    HadBreakpoints = FALSE;
-#if 0
-        KdpDeleteBreakpointRange((PVOID)WaitStateChange->ProgramCounter,
-                                 (PVOID)(WaitStateChange->ProgramCounter +
-                                         WaitStateChange->ControlReport.
-                                         InstructionCount - 1));
-#endif
+    HadBreakpoints =
+        KdpDeleteBreakpointRange((PVOID)(LONG_PTR)WaitStateChange->ProgramCounter,
+                                 (PVOID)((ULONG)WaitStateChange->ProgramCounter +
+                                         WaitStateChange->ControlReport.InstructionCount - 1));
     if (HadBreakpoints)
     {
         /* Copy the instruction stream again, this time without breakpoints */
@@ -190,12 +202,7 @@ KdpReadVirtualMemory(IN PDBGKD_MANIPULATE_STATE64 State,
     }
 #endif
 
-    if ((ULONG_PTR)State->u.ReadMemory.TargetBaseAddress < KSEG0_BASE)
-    {
-        Length = 0;
-        Status = STATUS_UNSUCCESSFUL;
-    }
-    else if ((ULONG_PTR)State->u.ReadMemory.TargetBaseAddress >= (ULONG_PTR)SharedUserData)
+    if (!State->u.ReadMemory.TargetBaseAddress)
     {
         Length = 0;
         Status = STATUS_UNSUCCESSFUL;
@@ -900,6 +907,9 @@ KdpReportExceptionStateChange(IN PEXCEPTION_RECORD ExceptionRecord,
         Header.Length = sizeof(DBGKD_WAIT_STATE_CHANGE64);
         Header.Buffer = (PCHAR)&WaitStateChange;
 
+        /* Setup the trace data */
+        DumpTraceData(&Data);
+
         /* Send State Change packet and wait for a reply */
         Status = KdpSendWaitContinue(PACKET_TYPE_KD_STATE_CHANGE64,
                                      &Header,
@@ -971,13 +981,9 @@ KdpSwitchProcessor(IN PEXCEPTION_RECORD ExceptionRecord,
     KdSave(FALSE);
 
     /* Report a state change */
-#if 0
     Status = KdpReportExceptionStateChange(ExceptionRecord,
                                            ContextRecord,
                                            SecondChanceException);
-#else
-    Status = FALSE;
-#endif
 
     /* Restore the port data and return */
     KdRestore(FALSE);

reactos/ntoskrnl/kd64/kddata.c

@@ -55,6 +55,12 @@ ULONG KdpNumInternalBreakpoints;
 
 ULONG KdpCurrentSymbolStart, KdpCurrentSymbolEnd;
 
+//
+// Tracepoint Data
+//
+ULONG TraceDataBuffer[40];
+ULONG TraceDataBufferPosition = 1;
+
 //
 // Time Slip Support
 //