1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321
|
/* Kernel Object Display facility for Cisco
Copyright 1999 Free Software Foundation, Inc.
Written by Tom Tromey <tromey@cygnus.com>.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "gdb_string.h"
#include "kod.h"
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* Define this to turn off communication with target. */
/* #define FAKE_PACKET */
/* Size of buffer used for remote communication. */
#define PBUFSIZ 400
/* Pointers to gdb callbacks. */
static void (*gdb_kod_display) (char *);
static void (*gdb_kod_query) (char *, char *, int *);
/* Initialize and return library name and version.
The gdb side of KOD, kod.c, passes us two functions: one for
displaying output (presumably to the user) and the other for
querying the target. */
char *
cisco_kod_open (kod_display_callback_ftype *display_func,
kod_query_callback_ftype *query_func)
{
char buffer[PBUFSIZ];
int bufsiz = PBUFSIZ;
int i, count;
gdb_kod_display = display_func;
gdb_kod_query = query_func;
/* Get the OS info, and check the version field. This is the stub
version, which we use to see whether we will understand what
comes back. This is lame, but the `qKoL' request doesn't
actually provide enough configurability.
Right now the only defined version number is `0.0.0'.
This stub supports qKoI and the `a' (any) object requests qKaL
and qKaI. Each `a' object is returned as a 4-byte integer ID.
An info request on an object returns a pair of 4-byte integers;
the first is the object pointer and the second is the thread ID. */
#ifndef FAKE_PACKET
(*gdb_kod_query) ("oI;", buffer, &bufsiz);
#else
strcpy (buffer, "Cisco IOS/Classic/13.4 0.0.0");
#endif
count = 2;
for (i = 0; count && buffer[i] != '\0'; ++i)
{
if (buffer[i] == ' ')
--count;
}
if (buffer[i] == '\0')
error ("Remote returned malformed packet\n");
if (strcmp (&buffer[i], "0.0.0"))
error ("Remote returned unknown stub version: %s\n", &buffer[i]);
/* Return name, version, and description. I hope we have enough
space. */
return (xstrdup ("gdbkodcisco v0.0.0 - Cisco Kernel Object Display"));
}
/* Close the connection. */
void
cisco_kod_close ()
{
}
/* Print a "bad packet" message. */
static void
bad_packet ()
{
(*gdb_kod_display) ("Remote target returned malformed packet.\n");
}
/* Print information about currently known kernel objects.
We currently ignore the argument. There is only one mode of
querying the Cisco kernel: we ask for a dump of everything, and
it returns it. */
void
cisco_kod_request (char *arg, int from_tty)
{
char buffer[PBUFSIZ], command[PBUFSIZ];
int done = 0, i;
int fail = 0;
char **sync_ids;
int sync_len = 0;
int sync_next = 0;
char *prev_id = NULL;
if (! arg || strcmp (arg, "any"))
{
/* "Top-level" command. This is really silly, but it also seems
to be how KOD is defined. */
/* Even sillier is the fact that this first line must start
with the word "List". See kod.tcl. */
(*gdb_kod_display) ("List of Cisco Kernel Objects\n");
(*gdb_kod_display) ("Object\tDescription\n");
(*gdb_kod_display) ("any\tAny and all objects\n");
return;
}
while (! done)
{
int off = 0; /* Where we are in the string. */
long count; /* Number of objects in this packet. */
int bufsiz = PBUFSIZ;
char *s_end;
strcpy (command, "aL");
if (prev_id)
{
strcat (command, ",");
strcat (command, prev_id);
}
strcat (command, ";");
#ifndef FAKE_PACKET
/* We talk to the target by calling through the query function
passed to us when we were initialized. */
(*gdb_kod_query) (command, buffer, &bufsiz);
#else
/* Fake up a multi-part packet. */
if (! strncmp (&command[3], "a500005a", 8))
strcpy (buffer, "KAL,01,1,f500005f;f500005f;");
else
strcpy (buffer, "KAL,02,0,a500005a;a500005a;de02869f;");
#endif
/* Empty response is an error. */
if (strlen (buffer) == 0)
{
(*gdb_kod_display) ("Remote target did not recognize kernel object query command.\n");
fail = 1;
break;
}
/* If we don't get a `K' response then the buffer holds the
target's error message. */
if (buffer[0] != 'K')
{
(*gdb_kod_display) (buffer);
fail = 1;
break;
}
/* Make sure we get the response we expect. */
if (strncmp (buffer, "KAL,", 4))
{
bad_packet ();
fail = 1;
break;
}
off += 4;
/* Parse out the count. We expect to convert exactly two
characters followed by a comma. */
count = strtol (&buffer[off], &s_end, 16);
if (s_end - &buffer[off] != 2 || buffer[off + 2] != ',')
{
bad_packet ();
fail = 1;
break;
}
off += 3;
/* Parse out the `done' flag. */
if ((buffer[off] != '0' && buffer[off] != '1')
|| buffer[off + 1] != ',')
{
bad_packet ();
fail = 1;
break;
}
done = buffer[off] == '1';
off += 2;
/* Id of the last item; we might this to construct the next
request. */
prev_id = &buffer[off];
if (strlen (prev_id) < 8 || buffer[off + 8] != ';')
{
bad_packet ();
fail = 1;
break;
}
buffer[off + 8] = '\0';
off += 9;
if (sync_len == 0)
sync_ids = (char **) xmalloc (count * sizeof (char *));
else
sync_ids = (char **) xrealloc (sync_ids,
(sync_len + count) * sizeof (char *));
sync_len += count;
for (i = 0; i < count; ++i)
{
if (strlen (&buffer[off]) < 8 || buffer[off + 8] != ';')
{
bad_packet ();
fail = 1;
break;
}
buffer[off + 8] = '\0';
sync_ids[sync_next++] = xstrdup (&buffer[off]);
off += 9;
}
if (buffer[off] != '\0')
{
bad_packet ();
fail = 1;
break;
}
}
/* We've collected all the sync object IDs. Now query to get the
specific information, and arrange to print this info. */
if (! fail)
{
(*gdb_kod_display) ("Object ID\tObject Pointer\tThread ID\n");
for (i = 0; i < sync_next; ++i)
{
int off = 0;
int bufsiz = PBUFSIZ;
/* For now assume a query can be accomplished in a single
transaction. This is implied in the protocol document.
See comments above, and the KOD protocol document, to
understand the parsing of the return value. */
strcpy (command, "aI,");
strcat (command, sync_ids[i]);
strcat (command, ";");
#ifndef FAKE_PACKET
(*gdb_kod_query) (command, buffer, &bufsiz);
#else
strcpy (buffer, "KAI,");
strcat (buffer, sync_ids[i]);
strcat (buffer, ",ffef00a0,cd00123d;");
#endif
if (strlen (buffer) == 0)
{
(*gdb_kod_display) ("Remote target did not recognize KOD command.\n");
break;
}
if (strncmp (buffer, "KAI,", 4))
{
bad_packet ();
break;
}
off += 4;
if (strncmp (&buffer[off], sync_ids[i], 8)
|| buffer[off + 8] != ',')
{
bad_packet ();
break;
}
off += 9;
/* Extract thread id and sync object pointer. */
if (strlen (&buffer[off]) != 2 * 8 + 2
|| buffer[off + 8] != ','
|| buffer[off + 17] != ';')
{
bad_packet ();
break;
}
buffer[off + 8] = '\0';
buffer[off + 17] = '\0';
/* Display the result. */
(*gdb_kod_display) (sync_ids[i]);
(*gdb_kod_display) ("\t");
(*gdb_kod_display) (&buffer[off]);
(*gdb_kod_display) ("\t");
(*gdb_kod_display) (&buffer[off + 9]);
(*gdb_kod_display) ("\n");
}
}
/* Free memory. */
for (i = 0; i < sync_next; ++i)
free (sync_ids[i]);
free (sync_ids);
}
|