[tkreuzer] 39002: kdcom: If a MessageData pointer is passed to KdReceivePacket, fill in Size member. Some cleanup. Now we pass the former assertion, but crash in KdpReadVirtualMemory. This lloks more like a bug in the x64 version of KdpReadControlSpace. Vista64 returns a kernel pointer that used in the following ReadMemory packet. Ros returns some crap.
21 Jan
2009
21 Jan
'09
6:19 p.m.
Author: tkreuzer
Date: Wed Jan 21 12:19:52 2009
New Revision: 39002
URL: http://svn.reactos.org/svn/reactos?rev=39002&view=rev
Log:
kdcom: If a MessageData pointer is passed to KdReceivePacket, fill in Size member. Some
cleanup. Now we pass the former assertion, but crash in KdpReadVirtualMemory. This lloks
more like a bug in the x64 version of KdpReadControlSpace. Vista64 returns a kernel
pointer that used in the following ReadMemory packet. Ros returns some crap.
Modified:
branches/ros-amd64-bringup/reactos/drivers/base/kdcom/i386/kdbg.c
Modified: branches/ros-amd64-bringup/reactos/drivers/base/kdcom/i386/kdbg.c
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/drive…
==============================================================================
--- branches/ros-amd64-bringup/reactos/drivers/base/kdcom/i386/kdbg.c [iso-8859-1]
(original)
+++ branches/ros-amd64-bringup/reactos/drivers/base/kdcom/i386/kdbg.c [iso-8859-1] Wed Jan
21 12:19:52 2009
@@ -903,8 +903,6 @@
for (;;)
{
- FrLdrDbgPrint("KdReceivePacket 0\n");
-
/* Step 1 - Read PacketLeader */
RcvCode = KdpReceivePacketLeader(&Packet.PacketLeader);
if (RcvCode != KdPacketReceived)
@@ -913,8 +911,6 @@
continue;
}
- FrLdrDbgPrint("KdReceivePacket 1, PacketLeader == 0x%x\n",
Packet.PacketLeader);
-
/* Step 2 - Read PacketType */
RcvCode = KdpReceiveBuffer(&Packet.PacketType, sizeof(USHORT));
if (RcvCode != KdPacketReceived)
@@ -923,8 +919,6 @@
continue;
}
- FrLdrDbgPrint("KdReceivePacket 2, PacketType == 0x%x\n",
Packet.PacketType);
-
/* Step 3 - Read ByteCount */
RcvCode = KdpReceiveBuffer(&Packet.ByteCount, sizeof(USHORT));
if (RcvCode != KdPacketReceived || Packet.ByteCount > PACKET_MAX_SIZE)
@@ -933,8 +927,6 @@
continue;
}
- FrLdrDbgPrint("KdReceivePacket 3, ByteCount == 0x%x\n",
Packet.ByteCount);
-
/* Step 4 - Read PacketId */
RcvCode = KdpReceiveBuffer(&Packet.PacketId, sizeof(ULONG));
if (RcvCode != KdPacketReceived)
@@ -943,7 +935,6 @@
continue;
}
- FrLdrDbgPrint("KdReceivePacket 4, PacketId == 0x%x\n",
Packet.PacketId);
/*
if (Packet.PacketId != ExpectedPacketId)
{
@@ -959,8 +950,6 @@
/* Didn't receive Checksum. Start over. */
continue;
}
-
- FrLdrDbgPrint("KdReceivePacket 5, Checksum == 0x%x\n",
Packet.Checksum);
/* Step 6 - Handle control packets */
if (Packet.PacketLeader == CONTROL_PACKET_LEADER)
@@ -973,16 +962,17 @@
/* Remote acknowledges the last packet */
return KdPacketReceived;
}
+ /* That's not what we were waiting for, start over. */
continue;
-
- case PACKET_TYPE_KD_RESEND:
- /* Remote wants us to resend the last packet */
- return KdPacketNeedsResend;
case PACKET_TYPE_KD_RESET:
FrLdrDbgPrint("KdReceivePacket - got a reset packet\n");
KdpSendControlPacket(PACKET_TYPE_KD_RESET, 0);
CurrentPacketId = INITIAL_PACKET_ID;
+ /* Fall through */
+
+ case PACKET_TYPE_KD_RESEND:
+ /* Remote wants us to resend the last packet */
return KdPacketNeedsResend;
default:
@@ -1025,7 +1015,7 @@
return KdPacketNeedsResend;
}
-FrLdrDbgPrint("KdReceivePacket - got normal PacketType\n");
+//FrLdrDbgPrint("KdReceivePacket - got normal PacketType\n");
/* Packet smaller than expected? */
if (MessageHeader->Length > Packet.ByteCount)
@@ -1035,7 +1025,7 @@
MessageHeader->Length = Packet.ByteCount;
}
-FrLdrDbgPrint("KdReceivePacket - got normal PacketType, Buffer = %p\n",
MessageHeader->Buffer);
+//FrLdrDbgPrint("KdReceivePacket - got normal PacketType, Buffer = %p\n",
MessageHeader->Buffer);
/* Receive the message header data */
RcvCode = KdpReceiveBuffer(MessageHeader->Buffer,
@@ -1047,38 +1037,43 @@
continue;
}
-FrLdrDbgPrint("KdReceivePacket - got normal PacketType 3\n");
+//FrLdrDbgPrint("KdReceivePacket - got normal PacketType 3\n");
/* Calculate checksum for the header data */
Checksum = KdpCalculateChecksum(MessageHeader->Buffer,
MessageHeader->Length);
/* Shall we receive messsage data? */
- if (MessageData && Packet.ByteCount > MessageHeader->Length)
- {
- FrLdrDbgPrint("KdReceivePacket - got normal PacketType 2b\n");
+ if (MessageData)
+ {
/* Calculate the length of the message data */
MessageData->Length = Packet.ByteCount - MessageHeader->Length;
- /* Receive the message data */
- RcvCode = KdpReceiveBuffer(MessageData->Buffer,
- MessageData->Length);
- if (RcvCode != KdPacketReceived)
+ /* Do we have data? */
+ if (MessageData->Length)
{
- /* Didn't receive data. Start over. */
- FrLdrDbgPrint("KdReceivePacket - Didn't receive message data.
Start over\n");
- continue;
+ FrLdrDbgPrint("KdReceivePacket - got data\n");
+
+ /* Receive the message data */
+ RcvCode = KdpReceiveBuffer(MessageData->Buffer,
+ MessageData->Length);
+ if (RcvCode != KdPacketReceived)
+ {
+ /* Didn't receive data. Start over. */
+ FrLdrDbgPrint("KdReceivePacket - Didn't receive message
data. Start over\n");
+ continue;
+ }
+
+ /* Add cheksum for message data */
+ Checksum += KdpCalculateChecksum(MessageData->Buffer,
+ MessageData->Length);
}
-
- /* Add cheksum for message data */
- Checksum += KdpCalculateChecksum(MessageData->Buffer,
- MessageData->Length);
}
/* Compare checksum */
if (Packet.Checksum != Checksum)
{
- // Send PACKET_TYPE_KD_RESEND
+ KdpSendControlPacket(PACKET_TYPE_KD_RESEND, CurrentPacketId);
FrLdrDbgPrint("KdReceivePacket - wrong cheksum, got %x, calculated
%x\n",
Packet.Checksum, Checksum);
continue;
@@ -1091,12 +1086,9 @@
KdpSendControlPacket(PACKET_TYPE_KD_ACKNOWLEDGE, CurrentPacketId);
CurrentPacketId ^= 1;
-FrLdrDbgPrint("KdReceivePacket - all ok\n");
+//FrLdrDbgPrint("KdReceivePacket - all ok\n");
return KdPacketReceived;
-
-
-
}
return KdPacketReceived;
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