322 lines
8.1 KiB
C
322 lines
8.1 KiB
C
/* Kernel Object Display facility for Cisco
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Copyright 1999 Free Software Foundation, Inc.
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Written by Tom Tromey <tromey@cygnus.com>.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "gdb_string.h"
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#include "kod.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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/* Define this to turn off communication with target. */
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/* #define FAKE_PACKET */
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/* Size of buffer used for remote communication. */
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#define PBUFSIZ 400
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/* Pointers to gdb callbacks. */
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static void (*gdb_kod_display) (char *);
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static void (*gdb_kod_query) (char *, char *, int *);
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/* Initialize and return library name and version.
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The gdb side of KOD, kod.c, passes us two functions: one for
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displaying output (presumably to the user) and the other for
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querying the target. */
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char *
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cisco_kod_open (kod_display_callback_ftype *display_func,
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kod_query_callback_ftype *query_func)
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{
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char buffer[PBUFSIZ];
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int bufsiz = PBUFSIZ;
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int i, count;
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gdb_kod_display = display_func;
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gdb_kod_query = query_func;
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/* Get the OS info, and check the version field. This is the stub
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version, which we use to see whether we will understand what
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comes back. This is lame, but the `qKoL' request doesn't
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actually provide enough configurability.
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Right now the only defined version number is `0.0.0'.
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This stub supports qKoI and the `a' (any) object requests qKaL
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and qKaI. Each `a' object is returned as a 4-byte integer ID.
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An info request on an object returns a pair of 4-byte integers;
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the first is the object pointer and the second is the thread ID. */
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#ifndef FAKE_PACKET
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(*gdb_kod_query) ("oI;", buffer, &bufsiz);
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#else
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strcpy (buffer, "Cisco IOS/Classic/13.4 0.0.0");
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#endif
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count = 2;
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for (i = 0; count && buffer[i] != '\0'; ++i)
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{
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if (buffer[i] == ' ')
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--count;
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}
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if (buffer[i] == '\0')
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error ("Remote returned malformed packet\n");
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if (strcmp (&buffer[i], "0.0.0"))
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error ("Remote returned unknown stub version: %s\n", &buffer[i]);
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/* Return name, version, and description. I hope we have enough
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space. */
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return (xstrdup ("gdbkodcisco v0.0.0 - Cisco Kernel Object Display"));
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}
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/* Close the connection. */
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void
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cisco_kod_close ()
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{
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}
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/* Print a "bad packet" message. */
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static void
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bad_packet ()
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{
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(*gdb_kod_display) ("Remote target returned malformed packet.\n");
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}
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/* Print information about currently known kernel objects.
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We currently ignore the argument. There is only one mode of
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querying the Cisco kernel: we ask for a dump of everything, and
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it returns it. */
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void
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cisco_kod_request (char *arg, int from_tty)
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{
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char buffer[PBUFSIZ], command[PBUFSIZ];
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int done = 0, i;
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int fail = 0;
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char **sync_ids;
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int sync_len = 0;
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int sync_next = 0;
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char *prev_id = NULL;
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if (! arg || strcmp (arg, "any"))
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{
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/* "Top-level" command. This is really silly, but it also seems
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to be how KOD is defined. */
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/* Even sillier is the fact that this first line must start
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with the word "List". See kod.tcl. */
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(*gdb_kod_display) ("List of Cisco Kernel Objects\n");
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(*gdb_kod_display) ("Object\tDescription\n");
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(*gdb_kod_display) ("any\tAny and all objects\n");
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return;
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}
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while (! done)
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{
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int off = 0; /* Where we are in the string. */
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long count; /* Number of objects in this packet. */
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int bufsiz = PBUFSIZ;
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char *s_end;
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strcpy (command, "aL");
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if (prev_id)
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{
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strcat (command, ",");
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strcat (command, prev_id);
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}
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strcat (command, ";");
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#ifndef FAKE_PACKET
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/* We talk to the target by calling through the query function
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passed to us when we were initialized. */
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(*gdb_kod_query) (command, buffer, &bufsiz);
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#else
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/* Fake up a multi-part packet. */
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if (! strncmp (&command[3], "a500005a", 8))
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strcpy (buffer, "KAL,01,1,f500005f;f500005f;");
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else
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strcpy (buffer, "KAL,02,0,a500005a;a500005a;de02869f;");
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#endif
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/* Empty response is an error. */
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if (strlen (buffer) == 0)
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{
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(*gdb_kod_display) ("Remote target did not recognize kernel object query command.\n");
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fail = 1;
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break;
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}
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/* If we don't get a `K' response then the buffer holds the
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target's error message. */
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if (buffer[0] != 'K')
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{
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(*gdb_kod_display) (buffer);
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fail = 1;
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break;
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}
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/* Make sure we get the response we expect. */
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if (strncmp (buffer, "KAL,", 4))
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{
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bad_packet ();
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fail = 1;
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break;
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}
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off += 4;
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/* Parse out the count. We expect to convert exactly two
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characters followed by a comma. */
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count = strtol (&buffer[off], &s_end, 16);
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if (s_end - &buffer[off] != 2 || buffer[off + 2] != ',')
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{
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bad_packet ();
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fail = 1;
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break;
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}
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off += 3;
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/* Parse out the `done' flag. */
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if ((buffer[off] != '0' && buffer[off] != '1')
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|| buffer[off + 1] != ',')
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{
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bad_packet ();
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fail = 1;
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break;
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}
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done = buffer[off] == '1';
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off += 2;
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/* Id of the last item; we might this to construct the next
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request. */
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prev_id = &buffer[off];
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if (strlen (prev_id) < 8 || buffer[off + 8] != ';')
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{
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bad_packet ();
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fail = 1;
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break;
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}
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buffer[off + 8] = '\0';
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off += 9;
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if (sync_len == 0)
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sync_ids = (char **) xmalloc (count * sizeof (char *));
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else
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sync_ids = (char **) xrealloc (sync_ids,
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(sync_len + count) * sizeof (char *));
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sync_len += count;
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for (i = 0; i < count; ++i)
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{
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if (strlen (&buffer[off]) < 8 || buffer[off + 8] != ';')
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{
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bad_packet ();
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fail = 1;
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break;
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}
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buffer[off + 8] = '\0';
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sync_ids[sync_next++] = xstrdup (&buffer[off]);
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off += 9;
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}
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if (buffer[off] != '\0')
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{
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bad_packet ();
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fail = 1;
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break;
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}
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}
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/* We've collected all the sync object IDs. Now query to get the
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specific information, and arrange to print this info. */
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if (! fail)
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{
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(*gdb_kod_display) ("Object ID\tObject Pointer\tThread ID\n");
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for (i = 0; i < sync_next; ++i)
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{
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int off = 0;
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int bufsiz = PBUFSIZ;
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/* For now assume a query can be accomplished in a single
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transaction. This is implied in the protocol document.
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See comments above, and the KOD protocol document, to
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understand the parsing of the return value. */
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strcpy (command, "aI,");
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strcat (command, sync_ids[i]);
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strcat (command, ";");
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#ifndef FAKE_PACKET
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(*gdb_kod_query) (command, buffer, &bufsiz);
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#else
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strcpy (buffer, "KAI,");
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strcat (buffer, sync_ids[i]);
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strcat (buffer, ",ffef00a0,cd00123d;");
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#endif
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if (strlen (buffer) == 0)
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{
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(*gdb_kod_display) ("Remote target did not recognize KOD command.\n");
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break;
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}
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if (strncmp (buffer, "KAI,", 4))
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{
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bad_packet ();
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break;
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}
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off += 4;
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if (strncmp (&buffer[off], sync_ids[i], 8)
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|| buffer[off + 8] != ',')
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{
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bad_packet ();
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break;
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}
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off += 9;
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/* Extract thread id and sync object pointer. */
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if (strlen (&buffer[off]) != 2 * 8 + 2
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|| buffer[off + 8] != ','
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|| buffer[off + 17] != ';')
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{
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bad_packet ();
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break;
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}
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buffer[off + 8] = '\0';
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buffer[off + 17] = '\0';
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/* Display the result. */
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(*gdb_kod_display) (sync_ids[i]);
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(*gdb_kod_display) ("\t");
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(*gdb_kod_display) (&buffer[off]);
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(*gdb_kod_display) ("\t");
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(*gdb_kod_display) (&buffer[off + 9]);
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(*gdb_kod_display) ("\n");
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}
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}
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/* Free memory. */
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for (i = 0; i < sync_next; ++i)
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free (sync_ids[i]);
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free (sync_ids);
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}
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