1/*
2 * Copyright 2015 LabWare
3 * Copyright 2014 Google, Inc.
4 * Copyright (c) 2002-2005 The Regents of The University of Michigan
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met: redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer;
11 * redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution;
14 * neither the name of the copyright holders nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Authors: Nathan Binkert
31 * Boris Shingarov
32 */
33
34/*
35 * Copyright (c) 1990, 1993 The Regents of the University of California
36 * All rights reserved
37 *
38 * This software was developed by the Computer Systems Engineering group
39 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
40 * contributed to Berkeley.
41 *
42 * All advertising materials mentioning features or use of this software
43 * must display the following acknowledgement:
44 * This product includes software developed by the University of
45 * California, Lawrence Berkeley Laboratories.
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 * 1. Redistributions of source code must retain the above copyright
51 * notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. All advertising materials mentioning features or use of this software
56 * must display the following acknowledgement:
57 * This product includes software developed by the University of
58 * California, Berkeley and its contributors.
59 * 4. Neither the name of the University nor the names of its contributors
60 * may be used to endorse or promote products derived from this software
61 * without specific prior written permission.
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 * SUCH DAMAGE.
74 *
75 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
76 */
77
78/*-
79 * Copyright (c) 2001 The NetBSD Foundation, Inc.
80 * All rights reserved.
81 *
82 * This code is derived from software contributed to The NetBSD Foundation
83 * by Jason R. Thorpe.
84 *
85 * Redistribution and use in source and binary forms, with or without
86 * modification, are permitted provided that the following conditions
87 * are met:
88 * 1. Redistributions of source code must retain the above copyright
89 * notice, this list of conditions and the following disclaimer.
90 * 2. Redistributions in binary form must reproduce the above copyright
91 * notice, this list of conditions and the following disclaimer in the
92 * documentation and/or other materials provided with the distribution.
93 * 3. All advertising materials mentioning features or use of this software
94 * must display the following acknowledgement:
95 * This product includes software developed by the NetBSD
96 * Foundation, Inc. and its contributors.
97 * 4. Neither the name of The NetBSD Foundation nor the names of its
98 * contributors may be used to endorse or promote products derived
99 * from this software without specific prior written permission.
100 *
101 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
102 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
103 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
104 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
105 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
106 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
107 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
108 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
109 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
110 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
111 * POSSIBILITY OF SUCH DAMAGE.
112 */
113
114/*
115 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
116 *
117 * Taken from NetBSD
118 *
119 * "Stub" to allow remote cpu to debug over a serial line using gdb.
120 */
121
122#include "base/remote_gdb.hh"
123
124#include <sys/signal.h>
125#include <unistd.h>
126
127#include <csignal>
| 1/*
2 * Copyright 2015 LabWare
3 * Copyright 2014 Google, Inc.
4 * Copyright (c) 2002-2005 The Regents of The University of Michigan
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met: redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer;
11 * redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution;
14 * neither the name of the copyright holders nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Authors: Nathan Binkert
31 * Boris Shingarov
32 */
33
34/*
35 * Copyright (c) 1990, 1993 The Regents of the University of California
36 * All rights reserved
37 *
38 * This software was developed by the Computer Systems Engineering group
39 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
40 * contributed to Berkeley.
41 *
42 * All advertising materials mentioning features or use of this software
43 * must display the following acknowledgement:
44 * This product includes software developed by the University of
45 * California, Lawrence Berkeley Laboratories.
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 * 1. Redistributions of source code must retain the above copyright
51 * notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. All advertising materials mentioning features or use of this software
56 * must display the following acknowledgement:
57 * This product includes software developed by the University of
58 * California, Berkeley and its contributors.
59 * 4. Neither the name of the University nor the names of its contributors
60 * may be used to endorse or promote products derived from this software
61 * without specific prior written permission.
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 * SUCH DAMAGE.
74 *
75 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
76 */
77
78/*-
79 * Copyright (c) 2001 The NetBSD Foundation, Inc.
80 * All rights reserved.
81 *
82 * This code is derived from software contributed to The NetBSD Foundation
83 * by Jason R. Thorpe.
84 *
85 * Redistribution and use in source and binary forms, with or without
86 * modification, are permitted provided that the following conditions
87 * are met:
88 * 1. Redistributions of source code must retain the above copyright
89 * notice, this list of conditions and the following disclaimer.
90 * 2. Redistributions in binary form must reproduce the above copyright
91 * notice, this list of conditions and the following disclaimer in the
92 * documentation and/or other materials provided with the distribution.
93 * 3. All advertising materials mentioning features or use of this software
94 * must display the following acknowledgement:
95 * This product includes software developed by the NetBSD
96 * Foundation, Inc. and its contributors.
97 * 4. Neither the name of The NetBSD Foundation nor the names of its
98 * contributors may be used to endorse or promote products derived
99 * from this software without specific prior written permission.
100 *
101 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
102 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
103 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
104 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
105 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
106 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
107 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
108 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
109 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
110 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
111 * POSSIBILITY OF SUCH DAMAGE.
112 */
113
114/*
115 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
116 *
117 * Taken from NetBSD
118 *
119 * "Stub" to allow remote cpu to debug over a serial line using gdb.
120 */
121
122#include "base/remote_gdb.hh"
123
124#include <sys/signal.h>
125#include <unistd.h>
126
127#include <csignal>
|
| 128#include <cstdint>
|
128#include <cstdio>
129#include <string>
130
131#include "arch/vtophys.hh"
132#include "base/intmath.hh"
133#include "base/socket.hh"
134#include "base/trace.hh"
135#include "config/the_isa.hh"
136#include "cpu/base.hh"
137#include "cpu/static_inst.hh"
138#include "cpu/thread_context.hh"
139#include "debug/GDBAll.hh"
140#include "mem/fs_translating_port_proxy.hh"
141#include "mem/port.hh"
142#include "mem/se_translating_port_proxy.hh"
143#include "sim/full_system.hh"
144#include "sim/system.hh"
145
146using namespace std;
147using namespace TheISA;
148
149#ifndef NDEBUG
150vector<BaseRemoteGDB *> debuggers;
151
152void
153debugger()
154{
155 static int current_debugger = -1;
156 if (current_debugger >= 0 && current_debugger < (int)debuggers.size()) {
157 BaseRemoteGDB *gdb = debuggers[current_debugger];
158 if (!gdb->isattached())
159 gdb->listener->accept();
160 if (gdb->isattached())
161 gdb->trap(SIGILL);
162 }
163}
164#endif
165
166///////////////////////////////////////////////////////////
167//
168//
169//
170
171GDBListener::InputEvent::InputEvent(GDBListener *l, int fd, int e)
172 : PollEvent(fd, e), listener(l)
173{}
174
175void
176GDBListener::InputEvent::process(int revent)
177{
178 listener->accept();
179}
180
181GDBListener::GDBListener(BaseRemoteGDB *g, int p)
182 : inputEvent(NULL), gdb(g), port(p)
183{
184 assert(!gdb->listener);
185 gdb->listener = this;
186}
187
188GDBListener::~GDBListener()
189{
190 if (inputEvent)
191 delete inputEvent;
192}
193
194string
195GDBListener::name()
196{
197 return gdb->name() + ".listener";
198}
199
200void
201GDBListener::listen()
202{
203 if (ListenSocket::allDisabled()) {
204 warn_once("Sockets disabled, not accepting gdb connections");
205 return;
206 }
207
208 while (!listener.listen(port, true)) {
209 DPRINTF(GDBMisc, "Can't bind port %d\n", port);
210 port++;
211 }
212
213 inputEvent = new InputEvent(this, listener.getfd(), POLLIN);
214 pollQueue.schedule(inputEvent);
215
216#ifndef NDEBUG
217 gdb->number = debuggers.size();
218 debuggers.push_back(gdb);
219#endif
220
221#ifndef NDEBUG
222 ccprintf(cerr, "%d: %s: listening for remote gdb #%d on port %d\n",
223 curTick(), name(), gdb->number, port);
224#else
225 ccprintf(cerr, "%d: %s: listening for remote gdb on port %d\n",
226 curTick(), name(), port);
227#endif
228}
229
230void
231GDBListener::accept()
232{
233 if (!listener.islistening())
234 panic("GDBListener::accept(): cannot accept if we're not listening!");
235
236 int sfd = listener.accept(true);
237
238 if (sfd != -1) {
239 if (gdb->isattached())
240 close(sfd);
241 else
242 gdb->attach(sfd);
243 }
244}
245
246BaseRemoteGDB::InputEvent::InputEvent(BaseRemoteGDB *g, int fd, int e)
247 : PollEvent(fd, e), gdb(g)
248{}
249
250void
251BaseRemoteGDB::InputEvent::process(int revent)
252{
253 if (gdb->trapEvent.scheduled()) {
254 warn("GDB trap event has already been scheduled! "
255 "Ignoring this input event.");
256 return;
257 }
258
259 if (revent & POLLIN) {
260 gdb->trapEvent.type(SIGILL);
261 gdb->scheduleInstCommitEvent(&gdb->trapEvent, 0);
262 } else if (revent & POLLNVAL) {
263 gdb->descheduleInstCommitEvent(&gdb->trapEvent);
264 gdb->detach();
265 }
266}
267
268void
269BaseRemoteGDB::TrapEvent::process()
270{
271 gdb->trap(_type);
272}
273
274void
275BaseRemoteGDB::SingleStepEvent::process()
276{
277 if (!gdb->singleStepEvent.scheduled())
278 gdb->scheduleInstCommitEvent(&gdb->singleStepEvent, 1);
279 gdb->trap(SIGTRAP);
280}
281
282BaseRemoteGDB::BaseRemoteGDB(System *_system, ThreadContext *c) :
283 inputEvent(NULL), trapEvent(this), listener(NULL),
284 number(-1), fd(-1), active(false), attached(false), system(_system),
285 context(c), singleStepEvent(this)
286{
287}
288
289BaseRemoteGDB::~BaseRemoteGDB()
290{
291 if (inputEvent)
292 delete inputEvent;
293}
294
295string
296BaseRemoteGDB::name()
297{
298 return system->name() + ".remote_gdb";
299}
300
301bool
302BaseRemoteGDB::isattached()
303{ return attached; }
304
305void
306BaseRemoteGDB::attach(int f)
307{
308 fd = f;
309
310 inputEvent = new InputEvent(this, fd, POLLIN);
311 pollQueue.schedule(inputEvent);
312
313 attached = true;
314 DPRINTFN("remote gdb attached\n");
315}
316
317void
318BaseRemoteGDB::detach()
319{
320 attached = false;
321 close(fd);
322 fd = -1;
323
324 pollQueue.remove(inputEvent);
325 DPRINTFN("remote gdb detached\n");
326}
327
328const char *
329BaseRemoteGDB::gdb_command(char cmd)
330{
331 switch (cmd) {
332 case GDBSignal: return "KGDB_SIGNAL";
333 case GDBSetBaud: return "KGDB_SET_BAUD";
334 case GDBSetBreak: return "KGDB_SET_BREAK";
335 case GDBCont: return "KGDB_CONT";
336 case GDBAsyncCont: return "KGDB_ASYNC_CONT";
337 case GDBDebug: return "KGDB_DEBUG";
338 case GDBDetach: return "KGDB_DETACH";
339 case GDBRegR: return "KGDB_REG_R";
340 case GDBRegW: return "KGDB_REG_W";
341 case GDBSetThread: return "KGDB_SET_THREAD";
342 case GDBCycleStep: return "KGDB_CYCLE_STEP";
343 case GDBSigCycleStep: return "KGDB_SIG_CYCLE_STEP";
344 case GDBKill: return "KGDB_KILL";
345 case GDBMemW: return "KGDB_MEM_W";
346 case GDBMemR: return "KGDB_MEM_R";
347 case GDBSetReg: return "KGDB_SET_REG";
348 case GDBReadReg: return "KGDB_READ_REG";
349 case GDBQueryVar: return "KGDB_QUERY_VAR";
350 case GDBSetVar: return "KGDB_SET_VAR";
351 case GDBReset: return "KGDB_RESET";
352 case GDBStep: return "KGDB_STEP";
353 case GDBAsyncStep: return "KGDB_ASYNC_STEP";
354 case GDBThreadAlive: return "KGDB_THREAD_ALIVE";
355 case GDBTargetExit: return "KGDB_TARGET_EXIT";
356 case GDBBinaryDload: return "KGDB_BINARY_DLOAD";
357 case GDBClrHwBkpt: return "KGDB_CLR_HW_BKPT";
358 case GDBSetHwBkpt: return "KGDB_SET_HW_BKPT";
359 case GDBStart: return "KGDB_START";
360 case GDBEnd: return "KGDB_END";
361 case GDBGoodP: return "KGDB_GOODP";
362 case GDBBadP: return "KGDB_BADP";
363 default: return "KGDB_UNKNOWN";
364 }
365}
366
367/////////////////////////
368//
369//
370
| 129#include <cstdio>
130#include <string>
131
132#include "arch/vtophys.hh"
133#include "base/intmath.hh"
134#include "base/socket.hh"
135#include "base/trace.hh"
136#include "config/the_isa.hh"
137#include "cpu/base.hh"
138#include "cpu/static_inst.hh"
139#include "cpu/thread_context.hh"
140#include "debug/GDBAll.hh"
141#include "mem/fs_translating_port_proxy.hh"
142#include "mem/port.hh"
143#include "mem/se_translating_port_proxy.hh"
144#include "sim/full_system.hh"
145#include "sim/system.hh"
146
147using namespace std;
148using namespace TheISA;
149
150#ifndef NDEBUG
151vector<BaseRemoteGDB *> debuggers;
152
153void
154debugger()
155{
156 static int current_debugger = -1;
157 if (current_debugger >= 0 && current_debugger < (int)debuggers.size()) {
158 BaseRemoteGDB *gdb = debuggers[current_debugger];
159 if (!gdb->isattached())
160 gdb->listener->accept();
161 if (gdb->isattached())
162 gdb->trap(SIGILL);
163 }
164}
165#endif
166
167///////////////////////////////////////////////////////////
168//
169//
170//
171
172GDBListener::InputEvent::InputEvent(GDBListener *l, int fd, int e)
173 : PollEvent(fd, e), listener(l)
174{}
175
176void
177GDBListener::InputEvent::process(int revent)
178{
179 listener->accept();
180}
181
182GDBListener::GDBListener(BaseRemoteGDB *g, int p)
183 : inputEvent(NULL), gdb(g), port(p)
184{
185 assert(!gdb->listener);
186 gdb->listener = this;
187}
188
189GDBListener::~GDBListener()
190{
191 if (inputEvent)
192 delete inputEvent;
193}
194
195string
196GDBListener::name()
197{
198 return gdb->name() + ".listener";
199}
200
201void
202GDBListener::listen()
203{
204 if (ListenSocket::allDisabled()) {
205 warn_once("Sockets disabled, not accepting gdb connections");
206 return;
207 }
208
209 while (!listener.listen(port, true)) {
210 DPRINTF(GDBMisc, "Can't bind port %d\n", port);
211 port++;
212 }
213
214 inputEvent = new InputEvent(this, listener.getfd(), POLLIN);
215 pollQueue.schedule(inputEvent);
216
217#ifndef NDEBUG
218 gdb->number = debuggers.size();
219 debuggers.push_back(gdb);
220#endif
221
222#ifndef NDEBUG
223 ccprintf(cerr, "%d: %s: listening for remote gdb #%d on port %d\n",
224 curTick(), name(), gdb->number, port);
225#else
226 ccprintf(cerr, "%d: %s: listening for remote gdb on port %d\n",
227 curTick(), name(), port);
228#endif
229}
230
231void
232GDBListener::accept()
233{
234 if (!listener.islistening())
235 panic("GDBListener::accept(): cannot accept if we're not listening!");
236
237 int sfd = listener.accept(true);
238
239 if (sfd != -1) {
240 if (gdb->isattached())
241 close(sfd);
242 else
243 gdb->attach(sfd);
244 }
245}
246
247BaseRemoteGDB::InputEvent::InputEvent(BaseRemoteGDB *g, int fd, int e)
248 : PollEvent(fd, e), gdb(g)
249{}
250
251void
252BaseRemoteGDB::InputEvent::process(int revent)
253{
254 if (gdb->trapEvent.scheduled()) {
255 warn("GDB trap event has already been scheduled! "
256 "Ignoring this input event.");
257 return;
258 }
259
260 if (revent & POLLIN) {
261 gdb->trapEvent.type(SIGILL);
262 gdb->scheduleInstCommitEvent(&gdb->trapEvent, 0);
263 } else if (revent & POLLNVAL) {
264 gdb->descheduleInstCommitEvent(&gdb->trapEvent);
265 gdb->detach();
266 }
267}
268
269void
270BaseRemoteGDB::TrapEvent::process()
271{
272 gdb->trap(_type);
273}
274
275void
276BaseRemoteGDB::SingleStepEvent::process()
277{
278 if (!gdb->singleStepEvent.scheduled())
279 gdb->scheduleInstCommitEvent(&gdb->singleStepEvent, 1);
280 gdb->trap(SIGTRAP);
281}
282
283BaseRemoteGDB::BaseRemoteGDB(System *_system, ThreadContext *c) :
284 inputEvent(NULL), trapEvent(this), listener(NULL),
285 number(-1), fd(-1), active(false), attached(false), system(_system),
286 context(c), singleStepEvent(this)
287{
288}
289
290BaseRemoteGDB::~BaseRemoteGDB()
291{
292 if (inputEvent)
293 delete inputEvent;
294}
295
296string
297BaseRemoteGDB::name()
298{
299 return system->name() + ".remote_gdb";
300}
301
302bool
303BaseRemoteGDB::isattached()
304{ return attached; }
305
306void
307BaseRemoteGDB::attach(int f)
308{
309 fd = f;
310
311 inputEvent = new InputEvent(this, fd, POLLIN);
312 pollQueue.schedule(inputEvent);
313
314 attached = true;
315 DPRINTFN("remote gdb attached\n");
316}
317
318void
319BaseRemoteGDB::detach()
320{
321 attached = false;
322 close(fd);
323 fd = -1;
324
325 pollQueue.remove(inputEvent);
326 DPRINTFN("remote gdb detached\n");
327}
328
329const char *
330BaseRemoteGDB::gdb_command(char cmd)
331{
332 switch (cmd) {
333 case GDBSignal: return "KGDB_SIGNAL";
334 case GDBSetBaud: return "KGDB_SET_BAUD";
335 case GDBSetBreak: return "KGDB_SET_BREAK";
336 case GDBCont: return "KGDB_CONT";
337 case GDBAsyncCont: return "KGDB_ASYNC_CONT";
338 case GDBDebug: return "KGDB_DEBUG";
339 case GDBDetach: return "KGDB_DETACH";
340 case GDBRegR: return "KGDB_REG_R";
341 case GDBRegW: return "KGDB_REG_W";
342 case GDBSetThread: return "KGDB_SET_THREAD";
343 case GDBCycleStep: return "KGDB_CYCLE_STEP";
344 case GDBSigCycleStep: return "KGDB_SIG_CYCLE_STEP";
345 case GDBKill: return "KGDB_KILL";
346 case GDBMemW: return "KGDB_MEM_W";
347 case GDBMemR: return "KGDB_MEM_R";
348 case GDBSetReg: return "KGDB_SET_REG";
349 case GDBReadReg: return "KGDB_READ_REG";
350 case GDBQueryVar: return "KGDB_QUERY_VAR";
351 case GDBSetVar: return "KGDB_SET_VAR";
352 case GDBReset: return "KGDB_RESET";
353 case GDBStep: return "KGDB_STEP";
354 case GDBAsyncStep: return "KGDB_ASYNC_STEP";
355 case GDBThreadAlive: return "KGDB_THREAD_ALIVE";
356 case GDBTargetExit: return "KGDB_TARGET_EXIT";
357 case GDBBinaryDload: return "KGDB_BINARY_DLOAD";
358 case GDBClrHwBkpt: return "KGDB_CLR_HW_BKPT";
359 case GDBSetHwBkpt: return "KGDB_SET_HW_BKPT";
360 case GDBStart: return "KGDB_START";
361 case GDBEnd: return "KGDB_END";
362 case GDBGoodP: return "KGDB_GOODP";
363 case GDBBadP: return "KGDB_BADP";
364 default: return "KGDB_UNKNOWN";
365 }
366}
367
368/////////////////////////
369//
370//
371
|
371uint8_t
372BaseRemoteGDB::getbyte()
| 372bool
373BaseRemoteGDB::getbyte(uint8_t &b)
|
373{
| 374{
|
374 uint8_t b;
375 if (::read(fd, &b, 1) != 1)
376 warn("could not read byte from debugger");
377 return b;
| 375 if (::read(fd, &b, sizeof(b)) == sizeof(b)) {
376 return true;
377 } else {
378 warn("Couldn't read data from debugger, detaching.");
379 detach();
380 return false;
381 }
|
378}
379
| 382}
383
|
380void
| 384bool
|
381BaseRemoteGDB::putbyte(uint8_t b)
382{
| 385BaseRemoteGDB::putbyte(uint8_t b)
386{
|
383 if (::write(fd, &b, 1) != 1)
384 warn("could not write byte to debugger");
| 387 if (::write(fd, &b, sizeof(b)) == sizeof(b)) {
388 return true;
389 } else {
390 warn("Couldn't write data to the debugger, detaching.");
391 detach();
392 return false;
393 }
|
385}
386
387// Send a packet to gdb
| 394}
395
396// Send a packet to gdb
|
388void
| 397ssize_t
|
389BaseRemoteGDB::send(const char *bp)
390{
391 const char *p;
392 uint8_t csum, c;
393
394 DPRINTF(GDBSend, "send: %s\n", bp);
395
396 do {
397 p = bp;
398 //Start sending a packet
| 398BaseRemoteGDB::send(const char *bp)
399{
400 const char *p;
401 uint8_t csum, c;
402
403 DPRINTF(GDBSend, "send: %s\n", bp);
404
405 do {
406 p = bp;
407 //Start sending a packet
|
399 putbyte(GDBStart);
| 408 if (!putbyte(GDBStart))
409 return -1;
|
400 //Send the contents, and also keep a check sum.
401 for (csum = 0; (c = *p); p++) {
| 410 //Send the contents, and also keep a check sum.
411 for (csum = 0; (c = *p); p++) {
|
402 putbyte(c);
| 412 if (!putbyte(c))
413 return -1;
|
403 csum += c;
404 }
| 414 csum += c;
415 }
|
405 //Send the ending character.
406 putbyte(GDBEnd);
407 //Sent the checksum.
408 putbyte(i2digit(csum >> 4));
409 putbyte(i2digit(csum));
410 //Try transmitting over and over again until the other end doesn't send an
411 //error back.
412 } while ((c = getbyte() & 0x7f) == GDBBadP);
| 416 if (//Send the ending character.
417 !putbyte(GDBEnd) ||
418 //Sent the checksum.
419 !putbyte(i2digit(csum >> 4)) ||
420 !putbyte(i2digit(csum))) {
421 return -1;
422 }
423 //Try transmitting over and over again until the other end doesn't
424 //send an error back.
425 if (!getbyte(c))
426 return -1;
427 } while ((c & 0x7f) == GDBBadP);
428 return 0;
|
413}
414
415// Receive a packet from gdb
416int
417BaseRemoteGDB::recv(char *bp, int maxlen)
418{
419 char *p;
| 429}
430
431// Receive a packet from gdb
432int
433BaseRemoteGDB::recv(char *bp, int maxlen)
434{
435 char *p;
|
420 int c, csum;
| 436 uint8_t c;
437 int csum;
|
421 int len;
422
423 do {
424 p = bp;
425 csum = len = 0;
426 //Find the beginning of a packet
| 438 int len;
439
440 do {
441 p = bp;
442 csum = len = 0;
443 //Find the beginning of a packet
|
427 while ((c = getbyte()) != GDBStart)
428 ;
| 444 do {
445 if (!getbyte(c))
446 return -1;
447 } while (c != GDBStart);
|
429
430 //Read until you find the end of the data in the packet, and keep
431 //track of the check sum.
| 448
449 //Read until you find the end of the data in the packet, and keep
450 //track of the check sum.
|
432 while ((c = getbyte()) != GDBEnd && len < maxlen) {
| 451 while (len < maxlen) {
452 if (!getbyte(c))
453 return -1;
454 if (c == GDBEnd)
455 break;
|
433 c &= 0x7f;
434 csum += c;
435 *p++ = c;
436 len++;
437 }
438
439 //Mask the check sum, and terminate the command string.
440 csum &= 0xff;
441 *p = '\0';
442
443 //If the command was too long, report an error.
444 if (len >= maxlen) {
| 456 c &= 0x7f;
457 csum += c;
458 *p++ = c;
459 len++;
460 }
461
462 //Mask the check sum, and terminate the command string.
463 csum &= 0xff;
464 *p = '\0';
465
466 //If the command was too long, report an error.
467 if (len >= maxlen) {
|
445 putbyte(GDBBadP);
| 468 if (!putbyte(GDBBadP))
469 return -1;
|
446 continue;
447 }
448
449 //Bring in the checksum. If the check sum matches, csum will be 0.
| 470 continue;
471 }
472
473 //Bring in the checksum. If the check sum matches, csum will be 0.
|
450 csum -= digit2i(getbyte()) * 16;
451 csum -= digit2i(getbyte());
| 474 uint8_t csum1, csum2;
475 if (!getbyte(csum1) || !getbyte(csum2))
476 return -1;
477 csum -= digit2i(csum1) * 16;
478 csum -= digit2i(csum2);
|
452
453 //If the check sum was correct
454 if (csum == 0) {
455 //Report that the packet was received correctly
| 479
480 //If the check sum was correct
481 if (csum == 0) {
482 //Report that the packet was received correctly
|
456 putbyte(GDBGoodP);
| 483 if (!putbyte(GDBGoodP))
484 return -1;
|
457 // Sequence present?
458 if (bp[2] == ':') {
| 485 // Sequence present?
486 if (bp[2] == ':') {
|
459 putbyte(bp[0]);
460 putbyte(bp[1]);
| 487 if (!putbyte(bp[0]) || !putbyte(bp[1]))
488 return -1;
|
461 len -= 3;
462 memcpy(bp, bp+3, len);
463 }
464 break;
465 }
466 //Otherwise, report that there was a mistake.
| 489 len -= 3;
490 memcpy(bp, bp+3, len);
491 }
492 break;
493 }
494 //Otherwise, report that there was a mistake.
|
467 putbyte(GDBBadP);
| 495 if (!putbyte(GDBBadP))
496 return -1;
|
468 } while (1);
469
470 DPRINTF(GDBRecv, "recv: %s: %s\n", gdb_command(*bp), bp);
471
472 return (len);
473}
474
475// Read bytes from kernel address space for debugger.
476bool
477BaseRemoteGDB::read(Addr vaddr, size_t size, char *data)
478{
479 static Addr lastaddr = 0;
480 static size_t lastsize = 0;
481
482 if (vaddr < 10) {
483 DPRINTF(GDBRead, "read: reading memory location zero!\n");
484 vaddr = lastaddr + lastsize;
485 }
486
487 DPRINTF(GDBRead, "read: addr=%#x, size=%d", vaddr, size);
488
489 if (FullSystem) {
490 FSTranslatingPortProxy &proxy = context->getVirtProxy();
491 proxy.readBlob(vaddr, (uint8_t*)data, size);
492 } else {
493 SETranslatingPortProxy &proxy = context->getMemProxy();
494 proxy.readBlob(vaddr, (uint8_t*)data, size);
495 }
496
497#if TRACING_ON
498 if (DTRACE(GDBRead)) {
499 if (DTRACE(GDBExtra)) {
500 char buf[1024];
501 mem2hex(buf, data, size);
502 DPRINTFNR(": %s\n", buf);
503 } else
504 DPRINTFNR("\n");
505 }
506#endif
507
508 return true;
509}
510
511// Write bytes to kernel address space for debugger.
512bool
513BaseRemoteGDB::write(Addr vaddr, size_t size, const char *data)
514{
515 static Addr lastaddr = 0;
516 static size_t lastsize = 0;
517
518 if (vaddr < 10) {
519 DPRINTF(GDBWrite, "write: writing memory location zero!\n");
520 vaddr = lastaddr + lastsize;
521 }
522
523 if (DTRACE(GDBWrite)) {
524 DPRINTFN("write: addr=%#x, size=%d", vaddr, size);
525 if (DTRACE(GDBExtra)) {
526 char buf[1024];
527 mem2hex(buf, data, size);
528 DPRINTFNR(": %s\n", buf);
529 } else
530 DPRINTFNR("\n");
531 }
532 if (FullSystem) {
533 FSTranslatingPortProxy &proxy = context->getVirtProxy();
534 proxy.writeBlob(vaddr, (uint8_t*)data, size);
535 } else {
536 SETranslatingPortProxy &proxy = context->getMemProxy();
537 proxy.writeBlob(vaddr, (uint8_t*)data, size);
538 }
539
540 return true;
541}
542
543void
544BaseRemoteGDB::clearSingleStep()
545{
546 descheduleInstCommitEvent(&singleStepEvent);
547}
548
549void
550BaseRemoteGDB::setSingleStep()
551{
552 if (!singleStepEvent.scheduled())
553 scheduleInstCommitEvent(&singleStepEvent, 1);
554}
555
556PCEventQueue *BaseRemoteGDB::getPcEventQueue()
557{
558 return &system->pcEventQueue;
559}
560
561EventQueue *
562BaseRemoteGDB::getComInstEventQueue()
563{
564 BaseCPU *cpu = context->getCpuPtr();
565 return cpu->comInstEventQueue[context->threadId()];
566}
567
568void
569BaseRemoteGDB::scheduleInstCommitEvent(Event *ev, int delta)
570{
571 EventQueue *eq = getComInstEventQueue();
572 // Here "ticks" aren't simulator ticks which measure time, they're
573 // instructions committed by the CPU.
574 eq->schedule(ev, eq->getCurTick() + delta);
575}
576
577void
578BaseRemoteGDB::descheduleInstCommitEvent(Event *ev)
579{
580 if (ev->scheduled())
581 getComInstEventQueue()->deschedule(ev);
582}
583
584bool
585BaseRemoteGDB::checkBpLen(size_t len)
586{
587 return len == sizeof(MachInst);
588}
589
590BaseRemoteGDB::HardBreakpoint::HardBreakpoint(BaseRemoteGDB *_gdb, Addr pc)
591 : PCEvent(_gdb->getPcEventQueue(), "HardBreakpoint Event", pc),
592 gdb(_gdb), refcount(0)
593{
594 DPRINTF(GDBMisc, "creating hardware breakpoint at %#x\n", evpc);
595}
596
597void
598BaseRemoteGDB::HardBreakpoint::process(ThreadContext *tc)
599{
600 DPRINTF(GDBMisc, "handling hardware breakpoint at %#x\n", pc());
601
602 if (tc == gdb->context)
603 gdb->trap(SIGTRAP);
604}
605
606bool
607BaseRemoteGDB::insertSoftBreak(Addr addr, size_t len)
608{
609 if (!checkBpLen(len))
610 panic("invalid length\n");
611
612 return insertHardBreak(addr, len);
613}
614
615bool
616BaseRemoteGDB::removeSoftBreak(Addr addr, size_t len)
617{
618 if (!checkBpLen(len))
619 panic("invalid length\n");
620
621 return removeHardBreak(addr, len);
622}
623
624bool
625BaseRemoteGDB::insertHardBreak(Addr addr, size_t len)
626{
627 if (!checkBpLen(len))
628 panic("invalid length\n");
629
630 DPRINTF(GDBMisc, "inserting hardware breakpoint at %#x\n", addr);
631
632 HardBreakpoint *&bkpt = hardBreakMap[addr];
633 if (bkpt == 0)
634 bkpt = new HardBreakpoint(this, addr);
635
636 bkpt->refcount++;
637
638 return true;
639}
640
641bool
642BaseRemoteGDB::removeHardBreak(Addr addr, size_t len)
643{
644 if (!checkBpLen(len))
645 panic("invalid length\n");
646
647 DPRINTF(GDBMisc, "removing hardware breakpoint at %#x\n", addr);
648
649 break_iter_t i = hardBreakMap.find(addr);
650 if (i == hardBreakMap.end())
651 return false;
652
653 HardBreakpoint *hbp = (*i).second;
654 if (--hbp->refcount == 0) {
655 delete hbp;
656 hardBreakMap.erase(i);
657 }
658
659 return true;
660}
661
662void
663BaseRemoteGDB::setTempBreakpoint(Addr bkpt)
664{
665 DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", bkpt);
666 insertHardBreak(bkpt, sizeof(TheISA::MachInst));
667}
668
669void
670BaseRemoteGDB::clearTempBreakpoint(Addr &bkpt)
671{
672 DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", bkpt);
673 removeHardBreak(bkpt, sizeof(TheISA::MachInst));
674 bkpt = 0;
675}
676
677const char *
678BaseRemoteGDB::break_type(char c)
679{
680 switch(c) {
681 case '0': return "software breakpoint";
682 case '1': return "hardware breakpoint";
683 case '2': return "write watchpoint";
684 case '3': return "read watchpoint";
685 case '4': return "access watchpoint";
686 default: return "unknown breakpoint/watchpoint";
687 }
688}
689
690// This function does all command processing for interfacing to a
691// remote gdb. Note that the error codes are ignored by gdb at
692// present, but might eventually become meaningful. (XXX) It might
693// makes sense to use POSIX errno values, because that is what the
694// gdb/remote.c functions want to return.
695bool
696BaseRemoteGDB::trap(int type)
697{
698 uint64_t val;
699 size_t datalen, len;
700 char data[GDBPacketBufLen + 1];
| 497 } while (1);
498
499 DPRINTF(GDBRecv, "recv: %s: %s\n", gdb_command(*bp), bp);
500
501 return (len);
502}
503
504// Read bytes from kernel address space for debugger.
505bool
506BaseRemoteGDB::read(Addr vaddr, size_t size, char *data)
507{
508 static Addr lastaddr = 0;
509 static size_t lastsize = 0;
510
511 if (vaddr < 10) {
512 DPRINTF(GDBRead, "read: reading memory location zero!\n");
513 vaddr = lastaddr + lastsize;
514 }
515
516 DPRINTF(GDBRead, "read: addr=%#x, size=%d", vaddr, size);
517
518 if (FullSystem) {
519 FSTranslatingPortProxy &proxy = context->getVirtProxy();
520 proxy.readBlob(vaddr, (uint8_t*)data, size);
521 } else {
522 SETranslatingPortProxy &proxy = context->getMemProxy();
523 proxy.readBlob(vaddr, (uint8_t*)data, size);
524 }
525
526#if TRACING_ON
527 if (DTRACE(GDBRead)) {
528 if (DTRACE(GDBExtra)) {
529 char buf[1024];
530 mem2hex(buf, data, size);
531 DPRINTFNR(": %s\n", buf);
532 } else
533 DPRINTFNR("\n");
534 }
535#endif
536
537 return true;
538}
539
540// Write bytes to kernel address space for debugger.
541bool
542BaseRemoteGDB::write(Addr vaddr, size_t size, const char *data)
543{
544 static Addr lastaddr = 0;
545 static size_t lastsize = 0;
546
547 if (vaddr < 10) {
548 DPRINTF(GDBWrite, "write: writing memory location zero!\n");
549 vaddr = lastaddr + lastsize;
550 }
551
552 if (DTRACE(GDBWrite)) {
553 DPRINTFN("write: addr=%#x, size=%d", vaddr, size);
554 if (DTRACE(GDBExtra)) {
555 char buf[1024];
556 mem2hex(buf, data, size);
557 DPRINTFNR(": %s\n", buf);
558 } else
559 DPRINTFNR("\n");
560 }
561 if (FullSystem) {
562 FSTranslatingPortProxy &proxy = context->getVirtProxy();
563 proxy.writeBlob(vaddr, (uint8_t*)data, size);
564 } else {
565 SETranslatingPortProxy &proxy = context->getMemProxy();
566 proxy.writeBlob(vaddr, (uint8_t*)data, size);
567 }
568
569 return true;
570}
571
572void
573BaseRemoteGDB::clearSingleStep()
574{
575 descheduleInstCommitEvent(&singleStepEvent);
576}
577
578void
579BaseRemoteGDB::setSingleStep()
580{
581 if (!singleStepEvent.scheduled())
582 scheduleInstCommitEvent(&singleStepEvent, 1);
583}
584
585PCEventQueue *BaseRemoteGDB::getPcEventQueue()
586{
587 return &system->pcEventQueue;
588}
589
590EventQueue *
591BaseRemoteGDB::getComInstEventQueue()
592{
593 BaseCPU *cpu = context->getCpuPtr();
594 return cpu->comInstEventQueue[context->threadId()];
595}
596
597void
598BaseRemoteGDB::scheduleInstCommitEvent(Event *ev, int delta)
599{
600 EventQueue *eq = getComInstEventQueue();
601 // Here "ticks" aren't simulator ticks which measure time, they're
602 // instructions committed by the CPU.
603 eq->schedule(ev, eq->getCurTick() + delta);
604}
605
606void
607BaseRemoteGDB::descheduleInstCommitEvent(Event *ev)
608{
609 if (ev->scheduled())
610 getComInstEventQueue()->deschedule(ev);
611}
612
613bool
614BaseRemoteGDB::checkBpLen(size_t len)
615{
616 return len == sizeof(MachInst);
617}
618
619BaseRemoteGDB::HardBreakpoint::HardBreakpoint(BaseRemoteGDB *_gdb, Addr pc)
620 : PCEvent(_gdb->getPcEventQueue(), "HardBreakpoint Event", pc),
621 gdb(_gdb), refcount(0)
622{
623 DPRINTF(GDBMisc, "creating hardware breakpoint at %#x\n", evpc);
624}
625
626void
627BaseRemoteGDB::HardBreakpoint::process(ThreadContext *tc)
628{
629 DPRINTF(GDBMisc, "handling hardware breakpoint at %#x\n", pc());
630
631 if (tc == gdb->context)
632 gdb->trap(SIGTRAP);
633}
634
635bool
636BaseRemoteGDB::insertSoftBreak(Addr addr, size_t len)
637{
638 if (!checkBpLen(len))
639 panic("invalid length\n");
640
641 return insertHardBreak(addr, len);
642}
643
644bool
645BaseRemoteGDB::removeSoftBreak(Addr addr, size_t len)
646{
647 if (!checkBpLen(len))
648 panic("invalid length\n");
649
650 return removeHardBreak(addr, len);
651}
652
653bool
654BaseRemoteGDB::insertHardBreak(Addr addr, size_t len)
655{
656 if (!checkBpLen(len))
657 panic("invalid length\n");
658
659 DPRINTF(GDBMisc, "inserting hardware breakpoint at %#x\n", addr);
660
661 HardBreakpoint *&bkpt = hardBreakMap[addr];
662 if (bkpt == 0)
663 bkpt = new HardBreakpoint(this, addr);
664
665 bkpt->refcount++;
666
667 return true;
668}
669
670bool
671BaseRemoteGDB::removeHardBreak(Addr addr, size_t len)
672{
673 if (!checkBpLen(len))
674 panic("invalid length\n");
675
676 DPRINTF(GDBMisc, "removing hardware breakpoint at %#x\n", addr);
677
678 break_iter_t i = hardBreakMap.find(addr);
679 if (i == hardBreakMap.end())
680 return false;
681
682 HardBreakpoint *hbp = (*i).second;
683 if (--hbp->refcount == 0) {
684 delete hbp;
685 hardBreakMap.erase(i);
686 }
687
688 return true;
689}
690
691void
692BaseRemoteGDB::setTempBreakpoint(Addr bkpt)
693{
694 DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", bkpt);
695 insertHardBreak(bkpt, sizeof(TheISA::MachInst));
696}
697
698void
699BaseRemoteGDB::clearTempBreakpoint(Addr &bkpt)
700{
701 DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", bkpt);
702 removeHardBreak(bkpt, sizeof(TheISA::MachInst));
703 bkpt = 0;
704}
705
706const char *
707BaseRemoteGDB::break_type(char c)
708{
709 switch(c) {
710 case '0': return "software breakpoint";
711 case '1': return "hardware breakpoint";
712 case '2': return "write watchpoint";
713 case '3': return "read watchpoint";
714 case '4': return "access watchpoint";
715 default: return "unknown breakpoint/watchpoint";
716 }
717}
718
719// This function does all command processing for interfacing to a
720// remote gdb. Note that the error codes are ignored by gdb at
721// present, but might eventually become meaningful. (XXX) It might
722// makes sense to use POSIX errno values, because that is what the
723// gdb/remote.c functions want to return.
724bool
725BaseRemoteGDB::trap(int type)
726{
727 uint64_t val;
728 size_t datalen, len;
729 char data[GDBPacketBufLen + 1];
|
701 char *buffer;
| |
702 size_t bufferSize;
703 const char *p;
704 char command, subcmd;
705 string var;
706 bool ret;
707
708 if (!attached)
709 return false;
710
711 unique_ptr<BaseRemoteGDB::BaseGdbRegCache> regCache(gdbRegs());
712
713 bufferSize = regCache->size() * 2 + 256;
| 730 size_t bufferSize;
731 const char *p;
732 char command, subcmd;
733 string var;
734 bool ret;
735
736 if (!attached)
737 return false;
738
739 unique_ptr<BaseRemoteGDB::BaseGdbRegCache> regCache(gdbRegs());
740
741 bufferSize = regCache->size() * 2 + 256;
|
714 buffer = (char*)malloc(bufferSize);
| 742 unique_ptr<char[]> buffer_mem(new char[bufferSize]);
743 char *buffer = buffer_mem.get();
|
715
716 DPRINTF(GDBMisc, "trap: PC=%s\n", context->pcState());
717
718 clearSingleStep();
719
720 /*
721 * The first entry to this function is normally through
722 * a breakpoint trap in kgdb_connect(), in which case we
723 * must advance past the breakpoint because gdb will not.
724 *
725 * On the first entry here, we expect that gdb is not yet
726 * listening to us, so just enter the interaction loop.
727 * After the debugger is "active" (connected) it will be
728 * waiting for a "signaled" message from us.
729 */
730 if (!active) {
731 active = true;
732 } else {
733 // Tell remote host that an exception has occurred.
734 snprintf(buffer, bufferSize, "S%02x", type);
| 744
745 DPRINTF(GDBMisc, "trap: PC=%s\n", context->pcState());
746
747 clearSingleStep();
748
749 /*
750 * The first entry to this function is normally through
751 * a breakpoint trap in kgdb_connect(), in which case we
752 * must advance past the breakpoint because gdb will not.
753 *
754 * On the first entry here, we expect that gdb is not yet
755 * listening to us, so just enter the interaction loop.
756 * After the debugger is "active" (connected) it will be
757 * waiting for a "signaled" message from us.
758 */
759 if (!active) {
760 active = true;
761 } else {
762 // Tell remote host that an exception has occurred.
763 snprintf(buffer, bufferSize, "S%02x", type);
|
735 send(buffer);
| 764 if (send(buffer) < 0)
765 return true;
|
736 }
737
738 // Stick frame regs into our reg cache.
739 regCache->getRegs(context);
740
741 for (;;) {
| 766 }
767
768 // Stick frame regs into our reg cache.
769 regCache->getRegs(context);
770
771 for (;;) {
|
742 datalen = recv(data, sizeof(data));
| 772 int recved = recv(data, sizeof(data));
773 if (recved < 0)
774 return true;
775 datalen = recved;
|
743 data[sizeof(data) - 1] = 0; // Sentinel
744 command = data[0];
745 subcmd = 0;
746 p = data + 1;
747 switch (command) {
748
749 case GDBSignal:
750 // if this command came from a running gdb, answer it --
751 // the other guy has no way of knowing if we're in or out
752 // of this loop when he issues a "remote-signal".
753 snprintf(buffer, bufferSize,
754 "S%02x", type);
| 776 data[sizeof(data) - 1] = 0; // Sentinel
777 command = data[0];
778 subcmd = 0;
779 p = data + 1;
780 switch (command) {
781
782 case GDBSignal:
783 // if this command came from a running gdb, answer it --
784 // the other guy has no way of knowing if we're in or out
785 // of this loop when he issues a "remote-signal".
786 snprintf(buffer, bufferSize,
787 "S%02x", type);
|
755 send(buffer);
| 788 if (send(buffer) < 0)
789 return true;
|
756 continue;
757
758 case GDBRegR:
759 if (2 * regCache->size() > bufferSize)
760 panic("buffer too small");
761
762 mem2hex(buffer, regCache->data(), regCache->size());
| 790 continue;
791
792 case GDBRegR:
793 if (2 * regCache->size() > bufferSize)
794 panic("buffer too small");
795
796 mem2hex(buffer, regCache->data(), regCache->size());
|
763 send(buffer);
| 797 if (send(buffer) < 0)
798 return true;
|
764 continue;
765
766 case GDBRegW:
767 p = hex2mem(regCache->data(), p, regCache->size());
| 799 continue;
800
801 case GDBRegW:
802 p = hex2mem(regCache->data(), p, regCache->size());
|
768 if (p == NULL || *p != '\0')
769 send("E01");
770 else {
| 803 if (p == NULL || *p != '\0') {
804 if (send("E01") < 0)
805 return true;
806 } else {
|
771 regCache->setRegs(context);
| 807 regCache->setRegs(context);
|
772 send("OK");
| 808 if (send("OK") < 0)
809 return true;
|
773 }
774 continue;
775
776 case GDBMemR:
777 val = hex2i(&p);
778 if (*p++ != ',') {
| 810 }
811 continue;
812
813 case GDBMemR:
814 val = hex2i(&p);
815 if (*p++ != ',') {
|
779 send("E02");
| 816 if (send("E02") < 0)
817 return true;
|
780 continue;
781 }
782 len = hex2i(&p);
783 if (*p != '\0') {
| 818 continue;
819 }
820 len = hex2i(&p);
821 if (*p != '\0') {
|
784 send("E03");
| 822 if (send("E03") < 0)
823 return true;
|
785 continue;
786 }
787 if (len > bufferSize) {
| 824 continue;
825 }
826 if (len > bufferSize) {
|
788 send("E04");
| 827 if (send("E04") < 0)
828 return true;
|
789 continue;
790 }
791 if (!acc(val, len)) {
| 829 continue;
830 }
831 if (!acc(val, len)) {
|
792 send("E05");
| 832 if (send("E05") < 0)
833 return true;
|
793 continue;
794 }
795
796 if (read(val, (size_t)len, buffer)) {
797 // variable length array would be nice, but C++ doesn't
798 // officially support those...
799 char *temp = new char[2*len+1];
800 mem2hex(temp, buffer, len);
| 834 continue;
835 }
836
837 if (read(val, (size_t)len, buffer)) {
838 // variable length array would be nice, but C++ doesn't
839 // officially support those...
840 char *temp = new char[2*len+1];
841 mem2hex(temp, buffer, len);
|
801 send(temp);
| 842 if (send(temp) < 0) {
843 delete [] temp;
844 return true;
845 }
|
802 delete [] temp;
803 } else {
| 846 delete [] temp;
847 } else {
|
804 send("E05");
| 848 if (send("E05") < 0)
849 return true;
|
805 }
806 continue;
807
808 case GDBMemW:
809 val = hex2i(&p);
810 if (*p++ != ',') {
| 850 }
851 continue;
852
853 case GDBMemW:
854 val = hex2i(&p);
855 if (*p++ != ',') {
|
811 send("E06");
| 856 if (send("E06") < 0)
857 return true;
|
812 continue;
813 }
814 len = hex2i(&p);
815 if (*p++ != ':') {
| 858 continue;
859 }
860 len = hex2i(&p);
861 if (*p++ != ':') {
|
816 send("E07");
| 862 if (send("E07") < 0)
863 return true;
|
817 continue;
818 }
819 if (len > datalen - (p - data)) {
| 864 continue;
865 }
866 if (len > datalen - (p - data)) {
|
820 send("E08");
| 867 if (send("E08") < 0)
868 return true;
|
821 continue;
822 }
823 p = hex2mem(buffer, p, bufferSize);
824 if (p == NULL) {
| 869 continue;
870 }
871 p = hex2mem(buffer, p, bufferSize);
872 if (p == NULL) {
|
825 send("E09");
| 873 if (send("E09") < 0)
874 return true;
|
826 continue;
827 }
828 if (!acc(val, len)) {
| 875 continue;
876 }
877 if (!acc(val, len)) {
|
829 send("E0A");
| 878 if (send("E0A") < 0)
879 return true;
|
830 continue;
831 }
| 880 continue;
881 }
|
832 if (write(val, (size_t)len, buffer))
833 send("OK");
834 else
835 send("E0B");
| 882 if (write(val, (size_t)len, buffer)) {
883 if (send("OK") < 0)
884 return true;
885 } else {
886 if (send("E0B") < 0)
887 return true;
888 }
|
836 continue;
837
838 case GDBSetThread:
839 subcmd = *p++;
840 val = hex2i(&p);
| 889 continue;
890
891 case GDBSetThread:
892 subcmd = *p++;
893 val = hex2i(&p);
|
841 if (val == 0)
842 send("OK");
843 else
844 send("E01");
| 894 if (val == 0) {
895 if (send("OK") < 0)
896 return true;
897 } else {
898 if (send("E01") < 0)
899 return true;
900 }
|
845 continue;
846
847 case GDBDetach:
848 case GDBKill:
849 active = false;
850 clearSingleStep();
851 detach();
| 901 continue;
902
903 case GDBDetach:
904 case GDBKill:
905 active = false;
906 clearSingleStep();
907 detach();
|
852 goto out;
| 908 return true;
|
853
854 case GDBAsyncCont:
855 subcmd = hex2i(&p);
856 if (*p++ == ';') {
857 val = hex2i(&p);
858 context->pcState(val);
859 }
860 clearSingleStep();
| 909
910 case GDBAsyncCont:
911 subcmd = hex2i(&p);
912 if (*p++ == ';') {
913 val = hex2i(&p);
914 context->pcState(val);
915 }
916 clearSingleStep();
|
861 goto out;
| 917 return true;
|
862
863 case GDBCont:
864 if (p - data < (ptrdiff_t)datalen) {
865 val = hex2i(&p);
866 context->pcState(val);
867 }
868 clearSingleStep();
| 918
919 case GDBCont:
920 if (p - data < (ptrdiff_t)datalen) {
921 val = hex2i(&p);
922 context->pcState(val);
923 }
924 clearSingleStep();
|
869 goto out;
| 925 return true;
|
870
871 case GDBAsyncStep:
872 subcmd = hex2i(&p);
873 if (*p++ == ';') {
874 val = hex2i(&p);
875 context->pcState(val);
876 }
877 setSingleStep();
| 926
927 case GDBAsyncStep:
928 subcmd = hex2i(&p);
929 if (*p++ == ';') {
930 val = hex2i(&p);
931 context->pcState(val);
932 }
933 setSingleStep();
|
878 goto out;
| 934 return true;
|
879
880 case GDBStep:
881 if (p - data < (ptrdiff_t)datalen) {
882 val = hex2i(&p);
883 context->pcState(val);
884 }
885 setSingleStep();
| 935
936 case GDBStep:
937 if (p - data < (ptrdiff_t)datalen) {
938 val = hex2i(&p);
939 context->pcState(val);
940 }
941 setSingleStep();
|
886 goto out;
| 942 return true;
|
887
888 case GDBClrHwBkpt:
889 subcmd = *p++;
| 943
944 case GDBClrHwBkpt:
945 subcmd = *p++;
|
890 if (*p++ != ',') send("E0D");
| 946 if (*p++ != ',' && send("E0D") < 0)
947 return true;
|
891 val = hex2i(&p);
| 948 val = hex2i(&p);
|
892 if (*p++ != ',') send("E0D");
| 949 if (*p++ != ',' && send("E0D") < 0)
950 return true;
|
893 len = hex2i(&p);
894
895 DPRINTF(GDBMisc, "clear %s, addr=%#x, len=%d\n",
896 break_type(subcmd), val, len);
897
898 ret = false;
899
900 switch (subcmd) {
901 case '0': // software breakpoint
902 ret = removeSoftBreak(val, len);
903 break;
904
905 case '1': // hardware breakpoint
906 ret = removeHardBreak(val, len);
907 break;
908
909 case '2': // write watchpoint
910 case '3': // read watchpoint
911 case '4': // access watchpoint
912 default: // unknown
| 951 len = hex2i(&p);
952
953 DPRINTF(GDBMisc, "clear %s, addr=%#x, len=%d\n",
954 break_type(subcmd), val, len);
955
956 ret = false;
957
958 switch (subcmd) {
959 case '0': // software breakpoint
960 ret = removeSoftBreak(val, len);
961 break;
962
963 case '1': // hardware breakpoint
964 ret = removeHardBreak(val, len);
965 break;
966
967 case '2': // write watchpoint
968 case '3': // read watchpoint
969 case '4': // access watchpoint
970 default: // unknown
|
913 send("");
| 971 if (send("") < 0)
972 return true;
|
914 break;
915 }
916
| 973 break;
974 }
975
|
917 send(ret ? "OK" : "E0C");
| 976 if (send(ret ? "OK" : "E0C") < 0)
977 return true;
|
918 continue;
919
920 case GDBSetHwBkpt:
921 subcmd = *p++;
| 978 continue;
979
980 case GDBSetHwBkpt:
981 subcmd = *p++;
|
922 if (*p++ != ',') send("E0D");
| 982 if (*p++ != ',' && send("E0D") < 0)
983 return true;
|
923 val = hex2i(&p);
| 984 val = hex2i(&p);
|
924 if (*p++ != ',') send("E0D");
| 985 if (*p++ != ',' && send("E0D") < 0)
986 return true;
|
925 len = hex2i(&p);
926
927 DPRINTF(GDBMisc, "set %s, addr=%#x, len=%d\n",
928 break_type(subcmd), val, len);
929
930 ret = false;
931
932 switch (subcmd) {
933 case '0': // software breakpoint
934 ret = insertSoftBreak(val, len);
935 break;
936
937 case '1': // hardware breakpoint
938 ret = insertHardBreak(val, len);
939 break;
940
941 case '2': // write watchpoint
942 case '3': // read watchpoint
943 case '4': // access watchpoint
944 default: // unknown
| 987 len = hex2i(&p);
988
989 DPRINTF(GDBMisc, "set %s, addr=%#x, len=%d\n",
990 break_type(subcmd), val, len);
991
992 ret = false;
993
994 switch (subcmd) {
995 case '0': // software breakpoint
996 ret = insertSoftBreak(val, len);
997 break;
998
999 case '1': // hardware breakpoint
1000 ret = insertHardBreak(val, len);
1001 break;
1002
1003 case '2': // write watchpoint
1004 case '3': // read watchpoint
1005 case '4': // access watchpoint
1006 default: // unknown
|
945 send("");
| 1007 if (send("") < 0)
1008 return true;
|
946 break;
947 }
948
| 1009 break;
1010 }
1011
|
949 send(ret ? "OK" : "E0C");
| 1012 if (send(ret ? "OK" : "E0C") < 0)
1013 return true;
|
950 continue;
951
952 case GDBQueryVar:
953 var = string(p, datalen - 1);
| 1014 continue;
1015
1016 case GDBQueryVar:
1017 var = string(p, datalen - 1);
|
954 if (var == "C")
955 send("QC0");
956 else
957 send("");
| 1018 if (var == "C") {
1019 if (send("QC0") < 0)
1020 return true;
1021 } else {
1022 if (send("") < 0)
1023 return true;
1024 }
|
958 continue;
959
960 case GDBSetBaud:
961 case GDBSetBreak:
962 case GDBDebug:
963 case GDBCycleStep:
964 case GDBSigCycleStep:
965 case GDBReadReg:
966 case GDBSetVar:
967 case GDBReset:
968 case GDBThreadAlive:
969 case GDBTargetExit:
970 case GDBBinaryDload:
971 // Unsupported command
972 DPRINTF(GDBMisc, "Unsupported command: %s\n",
973 gdb_command(command));
974 DDUMP(GDBMisc, (uint8_t *)data, datalen);
| 1025 continue;
1026
1027 case GDBSetBaud:
1028 case GDBSetBreak:
1029 case GDBDebug:
1030 case GDBCycleStep:
1031 case GDBSigCycleStep:
1032 case GDBReadReg:
1033 case GDBSetVar:
1034 case GDBReset:
1035 case GDBThreadAlive:
1036 case GDBTargetExit:
1037 case GDBBinaryDload:
1038 // Unsupported command
1039 DPRINTF(GDBMisc, "Unsupported command: %s\n",
1040 gdb_command(command));
1041 DDUMP(GDBMisc, (uint8_t *)data, datalen);
|
975 send("");
| 1042 if (send("") < 0)
1043 return true;
|
976 continue;
977
978 default:
979 // Unknown command.
980 DPRINTF(GDBMisc, "Unknown command: %c(%#x)\n",
981 command, command);
| 1044 continue;
1045
1046 default:
1047 // Unknown command.
1048 DPRINTF(GDBMisc, "Unknown command: %c(%#x)\n",
1049 command, command);
|
982 send("");
| 1050 if (send("") < 0)
1051 return true;
|
983 continue;
984
985
986 }
987 }
988
| 1052 continue;
1053
1054
1055 }
1056 }
1057
|
989 out:
990 free(buffer);
| |
991 return true;
992}
993
994// Convert a hex digit into an integer.
995// This returns -1 if the argument passed is no valid hex digit.
996int
997BaseRemoteGDB::digit2i(char c)
998{
999 if (c >= '0' && c <= '9')
1000 return (c - '0');
1001 else if (c >= 'a' && c <= 'f')
1002 return (c - 'a' + 10);
1003 else if (c >= 'A' && c <= 'F')
1004
1005 return (c - 'A' + 10);
1006 else
1007 return (-1);
1008}
1009
1010// Convert the low 4 bits of an integer into an hex digit.
1011char
1012BaseRemoteGDB::i2digit(int n)
1013{
1014 return ("0123456789abcdef"[n & 0x0f]);
1015}
1016
1017// Convert a byte array into an hex string.
1018void
1019BaseRemoteGDB::mem2hex(char *vdst, const char *vsrc, int len)
1020{
1021 char *dst = vdst;
1022 const char *src = vsrc;
1023
1024 while (len--) {
1025 *dst++ = i2digit(*src >> 4);
1026 *dst++ = i2digit(*src++);
1027 }
1028 *dst = '\0';
1029}
1030
1031// Convert an hex string into a byte array.
1032// This returns a pointer to the character following the last valid
1033// hex digit. If the string ends in the middle of a byte, NULL is
1034// returned.
1035const char *
1036BaseRemoteGDB::hex2mem(char *vdst, const char *src, int maxlen)
1037{
1038 char *dst = vdst;
1039 int msb, lsb;
1040
1041 while (*src && maxlen--) {
1042 msb = digit2i(*src++);
1043 if (msb < 0)
1044 return (src - 1);
1045 lsb = digit2i(*src++);
1046 if (lsb < 0)
1047 return (NULL);
1048 *dst++ = (msb << 4) | lsb;
1049 }
1050 return (src);
1051}
1052
1053// Convert an hex string into an integer.
1054// This returns a pointer to the character following the last valid
1055// hex digit.
1056Addr
1057BaseRemoteGDB::hex2i(const char **srcp)
1058{
1059 const char *src = *srcp;
1060 Addr r = 0;
1061 int nibble;
1062
1063 while ((nibble = digit2i(*src)) >= 0) {
1064 r *= 16;
1065 r += nibble;
1066 src++;
1067 }
1068 *srcp = src;
1069 return (r);
1070}
1071
| 1058 return true;
1059}
1060
1061// Convert a hex digit into an integer.
1062// This returns -1 if the argument passed is no valid hex digit.
1063int
1064BaseRemoteGDB::digit2i(char c)
1065{
1066 if (c >= '0' && c <= '9')
1067 return (c - '0');
1068 else if (c >= 'a' && c <= 'f')
1069 return (c - 'a' + 10);
1070 else if (c >= 'A' && c <= 'F')
1071
1072 return (c - 'A' + 10);
1073 else
1074 return (-1);
1075}
1076
1077// Convert the low 4 bits of an integer into an hex digit.
1078char
1079BaseRemoteGDB::i2digit(int n)
1080{
1081 return ("0123456789abcdef"[n & 0x0f]);
1082}
1083
1084// Convert a byte array into an hex string.
1085void
1086BaseRemoteGDB::mem2hex(char *vdst, const char *vsrc, int len)
1087{
1088 char *dst = vdst;
1089 const char *src = vsrc;
1090
1091 while (len--) {
1092 *dst++ = i2digit(*src >> 4);
1093 *dst++ = i2digit(*src++);
1094 }
1095 *dst = '\0';
1096}
1097
1098// Convert an hex string into a byte array.
1099// This returns a pointer to the character following the last valid
1100// hex digit. If the string ends in the middle of a byte, NULL is
1101// returned.
1102const char *
1103BaseRemoteGDB::hex2mem(char *vdst, const char *src, int maxlen)
1104{
1105 char *dst = vdst;
1106 int msb, lsb;
1107
1108 while (*src && maxlen--) {
1109 msb = digit2i(*src++);
1110 if (msb < 0)
1111 return (src - 1);
1112 lsb = digit2i(*src++);
1113 if (lsb < 0)
1114 return (NULL);
1115 *dst++ = (msb << 4) | lsb;
1116 }
1117 return (src);
1118}
1119
1120// Convert an hex string into an integer.
1121// This returns a pointer to the character following the last valid
1122// hex digit.
1123Addr
1124BaseRemoteGDB::hex2i(const char **srcp)
1125{
1126 const char *src = *srcp;
1127 Addr r = 0;
1128 int nibble;
1129
1130 while ((nibble = digit2i(*src)) >= 0) {
1131 r *= 16;
1132 r += nibble;
1133 src++;
1134 }
1135 *srcp = src;
1136 return (r);
1137}
1138
|