[ion] 25997: - 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.

Author: ion
Date: Mon Mar  5 06:23:58 2007
New Revision: 25997

URL: http://svn.reactos.org/svn/reactos?rev=25997&view=rev
Log:
- 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.

Modified:
    trunk/reactos/ntoskrnl/include/internal/kd64.h
    trunk/reactos/ntoskrnl/kd64/kdapi.c
    trunk/reactos/ntoskrnl/kd64/kddata.c

Modified: trunk/reactos/ntoskrnl/include/internal/kd64.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/k...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/kd64.h (original)
+++ trunk/reactos/ntoskrnl/include/internal/kd64.h Mon Mar  5 06:23:58 2007
@@ -219,6 +219,13 @@
 NTAPI
 KdpDeleteBreakpoint(
     IN ULONG BpEntry
+);
+
+BOOLEAN
+NTAPI
+KdpDeleteBreakpointRange(
+    IN PVOID Base,
+    IN PVOID Limit
 );

//
@@ -262,3 +269,5 @@
 extern BOOLEAN BreakpointsSuspended;
 extern ULONG KdpNumInternalBreakpoints;
 extern ULONG KdpCurrentSymbolStart, KdpCurrentSymbolEnd;
+extern ULONG TraceDataBuffer[40];
+extern ULONG TraceDataBufferPosition;

Modified: trunk/reactos/ntoskrnl/kd64/kdapi.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/kd64/kdapi.c?rev=2...
==============================================================================
--- trunk/reactos/ntoskrnl/kd64/kdapi.c (original)
+++ trunk/reactos/ntoskrnl/kd64/kdapi.c Mon Mar  5 06:23:58 2007
@@ -16,6 +16,21 @@

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,
                   IN PCONTEXT Context)
 {
@@ -87,13 +102,10 @@
     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 @@
     }
 #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 @@
         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 @@
     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);

Modified: trunk/reactos/ntoskrnl/kd64/kddata.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/kd64/kddata.c?rev=...
==============================================================================
--- trunk/reactos/ntoskrnl/kd64/kddata.c (original)
+++ trunk/reactos/ntoskrnl/kd64/kddata.c Mon Mar  5 06:23:58 2007
@@ -54,6 +54,12 @@
 ULONG KdpNumInternalBreakpoints;

ULONG KdpCurrentSymbolStart, KdpCurrentSymbolEnd;
+
+//
+// Tracepoint Data
+//
+ULONG TraceDataBuffer[40];
+ULONG TraceDataBufferPosition = 1;

//
 // Time Slip Support