1 /* Low-level RSP routines for GDB, the GNU debugger.
3 Copyright (C) 1988-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
35 if (a
>= '0' && a
<= '9')
37 else if (a
>= 'a' && a
<= 'f')
39 else if (a
>= 'A' && a
<= 'F')
42 error (_("Reply contains invalid hex digit %d"), a
);
53 return 'a' + nib
- 10;
56 /* Encode 64 bits in 16 chars of hex. */
58 static const char hexchars
[] = "0123456789abcdef";
61 ishex (int ch
, int *val
)
63 if ((ch
>= 'a') && (ch
<= 'f'))
68 if ((ch
>= 'A') && (ch
<= 'F'))
73 if ((ch
>= '0') && (ch
<= '9'))
84 pack_nibble (char *buf
, int nibble
)
86 *buf
++ = hexchars
[(nibble
& 0x0f)];
93 pack_hex_byte (char *pkt
, int byte
)
95 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
96 *pkt
++ = hexchars
[(byte
& 0xf)];
103 unpack_varlen_hex (char *buff
, /* packet to parse */
109 while (ishex (*buff
, &nibble
))
112 retval
= retval
<< 4;
113 retval
|= nibble
& 0x0f;
122 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
126 for (i
= 0; i
< count
; i
++)
128 if (hex
[0] == 0 || hex
[1] == 0)
130 /* Hex string is short, or of uneven length.
131 Return the count that has been converted so far. */
134 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
143 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
147 for (i
= 0; i
< count
; i
++)
149 *hex
++ = tohex ((*bin
>> 4) & 0xf);
150 *hex
++ = tohex (*bin
++ & 0xf);
159 remote_escape_output (const gdb_byte
*buffer
, int len
,
160 gdb_byte
*out_buf
, int *out_len
,
163 int input_index
, output_index
;
166 for (input_index
= 0; input_index
< len
; input_index
++)
168 gdb_byte b
= buffer
[input_index
];
170 if (b
== '$' || b
== '#' || b
== '}' || b
== '*')
172 /* These must be escaped. */
173 if (output_index
+ 2 > out_maxlen
)
175 out_buf
[output_index
++] = '}';
176 out_buf
[output_index
++] = b
^ 0x20;
180 if (output_index
+ 1 > out_maxlen
)
182 out_buf
[output_index
++] = b
;
186 *out_len
= input_index
;
193 remote_unescape_input (const gdb_byte
*buffer
, int len
,
194 gdb_byte
*out_buf
, int out_maxlen
)
196 int input_index
, output_index
;
201 for (input_index
= 0; input_index
< len
; input_index
++)
203 gdb_byte b
= buffer
[input_index
];
205 if (output_index
+ 1 > out_maxlen
)
206 error (_("Received too much data from the target."));
210 out_buf
[output_index
++] = b
^ 0x20;
216 out_buf
[output_index
++] = b
;
220 error (_("Unmatched escape character in target response."));
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