From ff6bd309f37b557cc8861dbf502c4079926d2b99 Mon Sep 17 00:00:00 2001
From: Alex Ionescu <aionescu@gmail.com>
Date: Sun, 18 Feb 2007 16:50:37 +0000
Subject: [PATCH] - Add stubs for KdSave, KdRestore, KdDebuggerInitialize0,
 KdSendPacket, KdReceivePacket to kdcom.dll - Implement and export
 KeTryToAcquireSpinLockAtDpcLevel.

svn path=/branches/alex-kd-branch/; revision=25835
---
 reactos/drivers/base/kdcom/kdbg.c    | 64 ++++++++++++++++++++++++++++
 reactos/drivers/base/kdcom/kdcom.def | 17 +++-----
 reactos/ntoskrnl/ke/spinlock.c       | 34 +++++++++++++++
 reactos/ntoskrnl/ntoskrnl.def        |  1 +
 4 files changed, 104 insertions(+), 12 deletions(-)

diff --git a/reactos/drivers/base/kdcom/kdbg.c b/reactos/drivers/base/kdcom/kdbg.c
index 2e5762afc82..5a79f80a2d6 100644
--- a/reactos/drivers/base/kdcom/kdbg.c
+++ b/reactos/drivers/base/kdcom/kdbg.c
@@ -17,6 +17,8 @@
 #include <halfuncs.h>
 #include <stdio.h>
 #include <debug.h>
+#include "arc/arc.h"
+#include "windbgkd.h"
 
 typedef struct _KD_PORT_INFORMATION
 {
@@ -553,4 +555,66 @@ KdPortEnableInterrupts()
 	return TRUE;
 }
 
+/*
+ * @unimplemented
+ */
+NTSTATUS
+NTAPI
+KdDebuggerInitialize0(IN PLOADER_PARAMETER_BLOCK LoaderBlock OPTIONAL)
+{
+    /* FIXME: TODO */
+    return STATUS_UNSUCCESSFUL;
+}
+
+/*
+ * @implemented
+ */
+NTSTATUS
+NTAPI
+KdSave(IN BOOLEAN SleepTransition)
+{
+    /* Nothing to do on COM ports */
+    return STATUS_SUCCESS;
+}
+
+/*
+ * @implemented
+ */
+NTSTATUS
+NTAPI
+KdRestore(IN BOOLEAN SleepTransition)
+{
+    /* Nothing to do on COM ports */
+    return STATUS_SUCCESS;
+}
+
+/*
+ * @unimplemented
+ */
+VOID
+NTAPI
+KdSendPacket(IN USHORT PacketType,
+             IN PSTRING Header,
+             IN PSTRING Data OPTIONAL,
+             OUT PKD_CONTEXT Context)
+{
+    /* FIXME: TODO */
+    return;
+}
+
+/*
+ * @unimplemented
+ */
+ULONG
+NTAPI
+KdReceivePacket(IN USHORT PacketType,
+                OUT PSTRING Header,
+                OUT PSTRING Data,
+                OUT PUSHORT DataSize,
+                OUT PKD_CONTEXT Context OPTIONAL)
+{
+    /* FIXME: TODO */
+    return 0;
+}
+
 /* EOF */
diff --git a/reactos/drivers/base/kdcom/kdcom.def b/reactos/drivers/base/kdcom/kdcom.def
index 05e95ca0d2a..1c6bd4091e2 100644
--- a/reactos/drivers/base/kdcom/kdcom.def
+++ b/reactos/drivers/base/kdcom/kdcom.def
@@ -1,15 +1,8 @@
 LIBRARY kdcom.dll
 EXPORTS
 
-KdPortGetByte@4
-KdPortGetByteEx@8
-KdPortInitialize@12
-KdPortInitializeEx@12
-KdPortPollByte@4
-KdPortPollByteEx@8
-KdPortPutByte@4
-KdPortPutByteEx@8
-KdPortRestore@0
-KdPortSave@0
-KdPortDisableInterrupts@0
-KdPortEnableInterrupts@0
+KdDebuggerInitialize0@4
+KdSave@4
+KdRestore@4
+KdReceivePacket@20
+KdSendPacket@16
diff --git a/reactos/ntoskrnl/ke/spinlock.c b/reactos/ntoskrnl/ke/spinlock.c
index 0a634148f47..00a910b31f4 100644
--- a/reactos/ntoskrnl/ke/spinlock.c
+++ b/reactos/ntoskrnl/ke/spinlock.c
@@ -165,6 +165,40 @@ KiReleaseSpinLock(IN PKSPIN_LOCK SpinLock)
     KxReleaseSpinLock(SpinLock);
 }
 
+/*
+ * @implemented
+ */
+BOOLEAN
+FASTCALL
+KeTryToAcquireSpinLockAtDpcLevel(IN OUT PKSPIN_LOCK SpinLock)
+{
+#ifdef CONFIG_SMP
+    /* Check if it's already acquired */
+    if (!(*SpinLock))
+    {
+        /* Try to acquire it */
+        if (InterlockedBitTestAndSet((PLONG)SpinLock, 0))
+        {
+            /* Someone else acquired it */
+            return FALSE;
+        }
+    }
+    else
+    {
+        /* It was already acquired */
+        return FALSE;
+    }
+
+#ifdef DBG
+    /* On debug builds, we OR in the KTHREAD */
+    *SpinLock = (ULONG_PTR)KeGetCurrentThread() | 1;
+#endif
+#endif
+
+    /* All is well, return TRUE */
+    return TRUE;
+}
+
 /*
  * @implemented
  */
diff --git a/reactos/ntoskrnl/ntoskrnl.def b/reactos/ntoskrnl/ntoskrnl.def
index e200edf2d22..70579c44a38 100644
--- a/reactos/ntoskrnl/ntoskrnl.def
+++ b/reactos/ntoskrnl/ntoskrnl.def
@@ -650,6 +650,7 @@ KeSynchronizeExecution@12
 KeTerminateThread@4
 KeTickCount DATA
 @KeTryToAcquireGuardedMutex@4
+@KeTryToAcquireSpinLockAtDpcLevel@4
 KeUpdateRunTime@4
 KeUpdateSystemTime@0
 KeUnstackDetachProcess@4