ReactOS 0.4.16-dev-321-g63bb46a
Functions | Variables
gdb_receive.c File Reference
#include "kdgdb.h"
Include dependency graph for gdb_receive.c:

Go to the source code of this file.

Functions

char hex_value (char ch)
 
KDSTATUS NTAPI gdb_receive_packet (_Inout_ PKD_CONTEXT KdContext)
 

Variables

CHAR gdb_input [0x1000]
 

Function Documentation

◆ gdb_receive_packet()

KDSTATUS NTAPI gdb_receive_packet ( _Inout_ PKD_CONTEXT  KdContext)

Definition at line 31 of file gdb_receive.c.

32{
33 UCHAR* ByteBuffer;
34 UCHAR Byte;
35 KDSTATUS Status;
36 CHAR CheckSum, ReceivedCheckSum;
37
38 do
39 {
40 Status = KdpReceiveByte(&Byte);
41 if (Status != KdPacketReceived)
42 return Status;
43 } while (Byte != '$');
44
45get_packet:
46 CheckSum = 0;
47 ByteBuffer = (UCHAR*)gdb_input;
48
49 while (TRUE)
50 {
51 /* Try to get a byte from the port */
52 Status = KdpReceiveByte(&Byte);
53 if (Status != KdPacketReceived)
54 return Status;
55
56 if (Byte == '#')
57 {
58 *ByteBuffer = '\0';
59 break;
60 }
61 CheckSum += (CHAR)Byte;
62
63 /* See if we should escape */
64 if (Byte == 0x7d)
65 {
66 Status = KdpReceiveByte(&Byte);
67 if (Status != KdPacketReceived)
68 return Status;
69 CheckSum += (CHAR)Byte;
70 Byte ^= 0x20;
71 }
72 *ByteBuffer++ = Byte;
73 }
74
75 /* Get Check sum (two bytes) */
76 Status = KdpReceiveByte(&Byte);
77 if (Status != KdPacketReceived)
78 goto end;
79 ReceivedCheckSum = hex_value(Byte) << 4;
80
81 Status = KdpReceiveByte(&Byte);
82 if (Status != KdPacketReceived)
83 goto end;
84 ReceivedCheckSum += hex_value(Byte);
85
86end:
87 if (ReceivedCheckSum != CheckSum)
88 {
89 /* Do not acknowledge to GDB */
90 KDDBGPRINT("Check sums don't match!");
91 KdpSendByte('-');
92 return KdPacketNeedsResend;
93 }
94
95 /* Ensure there is nothing left in the pipe */
96 while (KdpPollByte(&Byte) == KdPacketReceived)
97 {
98 switch (Byte)
99 {
100 case '$':
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}
CHAR
#define CHAR(Char)
TRUE
#define TRUE
Definition: types.h:120
Byte
unsigned char Byte
Definition: zlib.h:37
KDDBGPRINT
#define KDDBGPRINT(...)
Definition: kddll.h:19
gdb_input
CHAR gdb_input[0x1000]
Definition: gdb_receive.c:11
hex_value
char hex_value(char ch)
Definition: gdb_receive.c:15
Status
Status
Definition: gdiplustypes.h:25
end
GLuint GLuint end
Definition: gl.h:1545
KdpReceiveByte
KDP_STATUS NTAPI KdpReceiveByte(OUT PUCHAR OutByte)
Definition: kdcom.c:321
KdpPollByte
KDP_STATUS NTAPI KdpPollByte(OUT PUCHAR OutByte)
Definition: kdcom.c:299
KdpSendByte
VOID NTAPI KdpSendByte(IN UCHAR Byte)
Definition: kdcom.c:291
KdPacketReceived
#define KdPacketReceived
Definition: kddll.h:5
KdPacketNeedsResend
#define KdPacketNeedsResend
Definition: kddll.h:7
KDSTATUS
ULONG KDSTATUS
Definition: kddll.h:4
UCHAR
unsigned char UCHAR
Definition: xmlstorage.h:181
CHAR
char CHAR
Definition: xmlstorage.h:175

Referenced by gdb_receive_and_interpret_packet().

◆ hex_value()

char hex_value ( char  ch)

Definition at line 15 of file gdb_receive.c.

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}

Referenced by gdb_receive_packet(), gdb_send_register(), hex_to_address(), and hex_to_tid().

Variable Documentation

◆ gdb_input

CHAR gdb_input[0x1000]

Definition at line 11 of file gdb_receive.c.

Referenced by gdb_receive_and_interpret_packet(), gdb_receive_packet(), gdb_send_register(), handle_gdb_insert_breakpoint(), handle_gdb_query(), handle_gdb_read_mem(), handle_gdb_remove_breakpoint(), handle_gdb_set_thread(), handle_gdb_thread_alive(), handle_gdb_v(), and handle_gdb_write_mem().