ReactOS 0.4.15-dev-8419-g7f0e8a3
gdb_receive.c
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1/*
2 * COPYRIGHT: GPL, see COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: drivers/base/kddll/gdb_receive.c
5 * PURPOSE: Base functions for the kernel debugger.
6 */
7
8#include "kdgdb.h"
9
10/* GLOBALS ********************************************************************/
12
13/* GLOBAL FUNCTIONS ***********************************************************/
14char
15hex_value(char ch)
16{
17 if ((ch >= '0') && (ch <= '9'))
18 return (ch - '0');
19
20 if ((ch >= 'a') && (ch <= 'f'))
21 return (ch - 'a' + 10);
22
23 if ((ch >= 'A') && (ch <= 'F'))
24 return (ch - 'A' + 10);
25
26 return -1;
27}
28
32{
33 UCHAR* ByteBuffer;
34 UCHAR Byte;
36 CHAR CheckSum, ReceivedCheckSum;
37
38 do
39 {
42 return Status;
43 } while (Byte != '$');
44
45get_packet:
46 CheckSum = 0;
47 ByteBuffer = (UCHAR*)gdb_input;
48
49 while (TRUE)
50 {
51 /* Try to get a byte from the port */
54 return Status;
55
56 if (Byte == '#')
57 {
58 *ByteBuffer = '\0';
59 break;
60 }
61 CheckSum += (CHAR)Byte;
62
63 /* See if we should escape */
64 if (Byte == 0x7d)
65 {
68 return Status;
69 CheckSum += (CHAR)Byte;
70 Byte ^= 0x20;
71 }
72 *ByteBuffer++ = Byte;
73 }
74
75 /* Get Check sum (two bytes) */
78 goto end;
79 ReceivedCheckSum = hex_value(Byte) << 4;
80
83 goto end;
84 ReceivedCheckSum += hex_value(Byte);
85
86end:
87 if (ReceivedCheckSum != CheckSum)
88 {
89 /* Do not acknowledge to GDB */
90 KDDBGPRINT("Check sums don't match!");
91 KdpSendByte('-');
93 }
94
95 /* Ensure there is nothing left in the pipe */
97 {
98 switch (Byte)
99 {
100 case '$':
101 KDDBGPRINT("Received new packet just after %s.\n", gdb_input);
102 goto get_packet;
103 case 0x03:
104 KdContext->KdpControlCPending = TRUE;
105 break;
106 }
107 }
108
109 /* Acknowledge */
110 KdpSendByte('+');
111
112 return KdPacketReceived;
113}
#define CHAR(Char)
#define TRUE
Definition: types.h:120
unsigned char Byte
Definition: zlib.h:37
#define KDDBGPRINT(...)
Definition: kddll.h:19
KDSTATUS NTAPI gdb_receive_packet(_Inout_ PKD_CONTEXT KdContext)
Definition: gdb_receive.c:31
CHAR gdb_input[0x1000]
Definition: gdb_receive.c:11
char hex_value(char ch)
Definition: gdb_receive.c:15
Status
Definition: gdiplustypes.h:25
GLuint GLuint end
Definition: gl.h:1545
KDP_STATUS NTAPI KdpReceiveByte(OUT PUCHAR OutByte)
Definition: kdcom.c:321
KDP_STATUS NTAPI KdpPollByte(OUT PUCHAR OutByte)
Definition: kdcom.c:299
VOID NTAPI KdpSendByte(IN UCHAR Byte)
Definition: kdcom.c:291
#define _Inout_
Definition: ms_sal.h:378
#define KdPacketReceived
Definition: kddll.h:5
#define KdPacketNeedsResend
Definition: kddll.h:7
ULONG KDSTATUS
Definition: kddll.h:4
#define NTAPI
Definition: typedefs.h:36
unsigned char UCHAR
Definition: xmlstorage.h:181
char CHAR
Definition: xmlstorage.h:175