ReactOS 0.4.15-dev-5669-g09dde2c
kdserial.c File Reference
#include "kddll.h"
Include dependency graph for kdserial.c:

Go to the source code of this file.

Functions

VOID NTAPI KdpSendBuffer (IN PVOID Buffer, IN ULONG Size)
 
KDP_STATUS NTAPI KdpReceiveBuffer (OUT PVOID Buffer, IN ULONG Size)
 
KDP_STATUS NTAPI KdpReceivePacketLeader (OUT PULONG PacketLeader)
 

Function Documentation

◆ KdpReceiveBuffer()

KDP_STATUS NTAPI KdpReceiveBuffer ( OUT PVOID  Buffer,
IN ULONG  Size 
)

Definition at line 43 of file kdserial.c.

46{
47 PUCHAR ByteBuffer = Buffer;
48 UCHAR Byte;
50
51 while (Size-- > 0)
52 {
53 /* Try to get a byte from the port */
56 return Status;
57
58 *ByteBuffer++ = Byte;
59 }
60
62}
Definition: bufpool.h:45
unsigned char Byte
Definition: zlib.h:37
KDP_STATUS
Definition: kddll.h:26
@ KDP_PACKET_RECEIVED
Definition: kddll.h:27
Status
Definition: gdiplustypes.h:25
KDP_STATUS NTAPI KdpReceiveByte(OUT PUCHAR OutByte)
Definition: kdcom.c:321
unsigned char * PUCHAR
Definition: typedefs.h:53
_Must_inspect_result_ _In_ WDFDEVICE _In_ PWDF_DEVICE_PROPERTY_DATA _In_ DEVPROPTYPE _In_ ULONG Size
Definition: wdfdevice.h:4533
unsigned char UCHAR
Definition: xmlstorage.h:181

Referenced by KdReceivePacket().

◆ KdpReceivePacketLeader()

KDP_STATUS NTAPI KdpReceivePacketLeader ( OUT PULONG  PacketLeader)

Definition at line 75 of file kdserial.c.

77{
78 UCHAR Index = 0, Byte, Buffer[4];
79 KDP_STATUS KdStatus;
80
81 /* Set first character to 0 */
82 Buffer[0] = 0;
83
84 do
85 {
86 /* Receive a single byte */
87 KdStatus = KdpReceiveByte(&Byte);
88
89 /* Check for timeout */
90 if (KdStatus == KDP_PACKET_TIMEOUT)
91 {
92 /* Check if we already got a breakin byte */
94 {
95 return KDP_PACKET_RESEND;
96 }
97
98 /* Report timeout */
99 return KDP_PACKET_TIMEOUT;
100 }
101
102 /* Check if we received a byte */
103 if (KdStatus == KDP_PACKET_RECEIVED)
104 {
105 /* Check if this is a valid packet leader byte */
106 if (Byte == PACKET_LEADER_BYTE ||
108 {
109 /* Check if we match the first byte */
110 if (Byte != Buffer[0])
111 {
112 /* No, this is the new byte 0! */
113 Index = 0;
114 }
115
116 /* Store the byte in the buffer */
117 Buffer[Index] = Byte;
118
119 /* Continue with next byte */
120 Index++;
121 continue;
122 }
123
124 /* Check for breakin byte */
126 {
127 KDDBGPRINT("BREAKIN_PACKET_BYTE\n");
128 Index = 0;
129 Buffer[0] = Byte;
130 continue;
131 }
132 }
133
134 /* Restart */
135 Index = 0;
136 Buffer[0] = 0;
137 }
138 while (Index < 4);
139
140 /* Enable the debugger */
142 SharedUserData->KdDebuggerEnabled |= 0x00000002;
143
144 /* Return the received packet leader */
145 *PacketLeader = *(PULONG)Buffer;
146
147 return KDP_PACKET_RECEIVED;
148}
#define FALSE
Definition: types.h:117
#define KDDBGPRINT(...)
Definition: kddll.h:19
@ KDP_PACKET_TIMEOUT
Definition: kddll.h:28
@ KDP_PACKET_RESEND
Definition: kddll.h:29
#define SharedUserData
uint32_t * PULONG
Definition: typedefs.h:59
_In_ WDFCOLLECTION _In_ ULONG Index
#define BREAKIN_PACKET_BYTE
Definition: windbgkd.h:31
#define CONTROL_PACKET_LEADER_BYTE
Definition: windbgkd.h:35
#define PACKET_LEADER_BYTE
Definition: windbgkd.h:33
#define KD_DEBUGGER_NOT_PRESENT
Definition: kdfuncs.h:133

Referenced by KdReceivePacket().

◆ KdpSendBuffer()

VOID NTAPI KdpSendBuffer ( IN PVOID  Buffer,
IN ULONG  Size 
)

Definition at line 21 of file kdserial.c.

24{
25 PUCHAR ByteBuffer = Buffer;
26
27 while (Size-- > 0)
28 {
29 KdpSendByte(*ByteBuffer++);
30 }
31}
VOID NTAPI KdpSendByte(IN UCHAR Byte)
Definition: kdcom.c:291

Referenced by KdpSendControlPacket(), and KdSendPacket().