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Commit | Line | Data |
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b4608c04 FB |
1 | /* |
2 | * gdb server stub | |
5fafdf24 | 3 | * |
42a09596 AB |
4 | * This implements a subset of the remote protocol as described in: |
5 | * | |
6 | * https://sourceware.org/gdb/onlinedocs/gdb/Remote-Protocol.html | |
7 | * | |
3475187d | 8 | * Copyright (c) 2003-2005 Fabrice Bellard |
b4608c04 FB |
9 | * |
10 | * This library is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU Lesser General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This library is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public | |
8167ee88 | 21 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
42a09596 AB |
22 | * |
23 | * SPDX-License-Identifier: LGPL-2.0+ | |
b4608c04 | 24 | */ |
856dfd8a | 25 | |
d38ea87a | 26 | #include "qemu/osdep.h" |
a8d25326 | 27 | #include "qemu-common.h" |
da34e65c | 28 | #include "qapi/error.h" |
508b4ecc | 29 | #include "qemu/error-report.h" |
856dfd8a | 30 | #include "qemu/ctype.h" |
f348b6d1 | 31 | #include "qemu/cutils.h" |
0b8fa32f | 32 | #include "qemu/module.h" |
243af022 | 33 | #include "trace/trace-root.h" |
f348b6d1 | 34 | #ifdef CONFIG_USER_ONLY |
1fddef4b FB |
35 | #include "qemu.h" |
36 | #else | |
83c9089e | 37 | #include "monitor/monitor.h" |
8228e353 | 38 | #include "chardev/char.h" |
4d43a603 | 39 | #include "chardev/char-fe.h" |
9c17d615 | 40 | #include "sysemu/sysemu.h" |
022c62cb | 41 | #include "exec/gdbstub.h" |
8f468636 | 42 | #include "hw/cpu/cluster.h" |
5cc8767d | 43 | #include "hw/boards.h" |
1fddef4b | 44 | #endif |
67b915a5 | 45 | |
56aebc89 PB |
46 | #define MAX_PACKET_LENGTH 4096 |
47 | ||
1de7afc9 | 48 | #include "qemu/sockets.h" |
b3946626 | 49 | #include "sysemu/hw_accel.h" |
9c17d615 | 50 | #include "sysemu/kvm.h" |
54d31236 | 51 | #include "sysemu/runstate.h" |
6b5fe137 | 52 | #include "semihosting/semihost.h" |
63c91552 | 53 | #include "exec/exec-all.h" |
fda8458b | 54 | #include "sysemu/replay.h" |
ca587a8e | 55 | |
a3919386 JK |
56 | #ifdef CONFIG_USER_ONLY |
57 | #define GDB_ATTACHED "0" | |
58 | #else | |
59 | #define GDB_ATTACHED "1" | |
60 | #endif | |
61 | ||
ab4752ec JD |
62 | #ifndef CONFIG_USER_ONLY |
63 | static int phy_memory_mode; | |
64 | #endif | |
65 | ||
f3659eee AF |
66 | static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, |
67 | uint8_t *buf, int len, bool is_write) | |
44520db1 | 68 | { |
ab4752ec | 69 | CPUClass *cc; |
f3659eee | 70 | |
ab4752ec JD |
71 | #ifndef CONFIG_USER_ONLY |
72 | if (phy_memory_mode) { | |
73 | if (is_write) { | |
74 | cpu_physical_memory_write(addr, buf, len); | |
75 | } else { | |
76 | cpu_physical_memory_read(addr, buf, len); | |
77 | } | |
78 | return 0; | |
79 | } | |
80 | #endif | |
81 | ||
82 | cc = CPU_GET_CLASS(cpu); | |
f3659eee AF |
83 | if (cc->memory_rw_debug) { |
84 | return cc->memory_rw_debug(cpu, addr, buf, len, is_write); | |
85 | } | |
86 | return cpu_memory_rw_debug(cpu, addr, buf, len, is_write); | |
44520db1 | 87 | } |
ca587a8e | 88 | |
d2a6c857 AB |
89 | /* Return the GDB index for a given vCPU state. |
90 | * | |
91 | * For user mode this is simply the thread id. In system mode GDB | |
92 | * numbers CPUs from 1 as 0 is reserved as an "any cpu" index. | |
93 | */ | |
94 | static inline int cpu_gdb_index(CPUState *cpu) | |
95 | { | |
96 | #if defined(CONFIG_USER_ONLY) | |
bd88c780 AB |
97 | TaskState *ts = (TaskState *) cpu->opaque; |
98 | return ts->ts_tid; | |
d2a6c857 AB |
99 | #else |
100 | return cpu->cpu_index + 1; | |
101 | #endif | |
102 | } | |
103 | ||
ca587a8e AJ |
104 | enum { |
105 | GDB_SIGNAL_0 = 0, | |
106 | GDB_SIGNAL_INT = 2, | |
425189a8 | 107 | GDB_SIGNAL_QUIT = 3, |
ca587a8e | 108 | GDB_SIGNAL_TRAP = 5, |
425189a8 JK |
109 | GDB_SIGNAL_ABRT = 6, |
110 | GDB_SIGNAL_ALRM = 14, | |
111 | GDB_SIGNAL_IO = 23, | |
112 | GDB_SIGNAL_XCPU = 24, | |
ca587a8e AJ |
113 | GDB_SIGNAL_UNKNOWN = 143 |
114 | }; | |
115 | ||
116 | #ifdef CONFIG_USER_ONLY | |
117 | ||
118 | /* Map target signal numbers to GDB protocol signal numbers and vice | |
119 | * versa. For user emulation's currently supported systems, we can | |
120 | * assume most signals are defined. | |
121 | */ | |
122 | ||
123 | static int gdb_signal_table[] = { | |
124 | 0, | |
125 | TARGET_SIGHUP, | |
126 | TARGET_SIGINT, | |
127 | TARGET_SIGQUIT, | |
128 | TARGET_SIGILL, | |
129 | TARGET_SIGTRAP, | |
130 | TARGET_SIGABRT, | |
131 | -1, /* SIGEMT */ | |
132 | TARGET_SIGFPE, | |
133 | TARGET_SIGKILL, | |
134 | TARGET_SIGBUS, | |
135 | TARGET_SIGSEGV, | |
136 | TARGET_SIGSYS, | |
137 | TARGET_SIGPIPE, | |
138 | TARGET_SIGALRM, | |
139 | TARGET_SIGTERM, | |
140 | TARGET_SIGURG, | |
141 | TARGET_SIGSTOP, | |
142 | TARGET_SIGTSTP, | |
143 | TARGET_SIGCONT, | |
144 | TARGET_SIGCHLD, | |
145 | TARGET_SIGTTIN, | |
146 | TARGET_SIGTTOU, | |
147 | TARGET_SIGIO, | |
148 | TARGET_SIGXCPU, | |
149 | TARGET_SIGXFSZ, | |
150 | TARGET_SIGVTALRM, | |
151 | TARGET_SIGPROF, | |
152 | TARGET_SIGWINCH, | |
153 | -1, /* SIGLOST */ | |
154 | TARGET_SIGUSR1, | |
155 | TARGET_SIGUSR2, | |
c72d5bf8 | 156 | #ifdef TARGET_SIGPWR |
ca587a8e | 157 | TARGET_SIGPWR, |
c72d5bf8 BS |
158 | #else |
159 | -1, | |
160 | #endif | |
ca587a8e AJ |
161 | -1, /* SIGPOLL */ |
162 | -1, | |
163 | -1, | |
164 | -1, | |
165 | -1, | |
166 | -1, | |
167 | -1, | |
168 | -1, | |
169 | -1, | |
170 | -1, | |
171 | -1, | |
172 | -1, | |
c72d5bf8 | 173 | #ifdef __SIGRTMIN |
ca587a8e AJ |
174 | __SIGRTMIN + 1, |
175 | __SIGRTMIN + 2, | |
176 | __SIGRTMIN + 3, | |
177 | __SIGRTMIN + 4, | |
178 | __SIGRTMIN + 5, | |
179 | __SIGRTMIN + 6, | |
180 | __SIGRTMIN + 7, | |
181 | __SIGRTMIN + 8, | |
182 | __SIGRTMIN + 9, | |
183 | __SIGRTMIN + 10, | |
184 | __SIGRTMIN + 11, | |
185 | __SIGRTMIN + 12, | |
186 | __SIGRTMIN + 13, | |
187 | __SIGRTMIN + 14, | |
188 | __SIGRTMIN + 15, | |
189 | __SIGRTMIN + 16, | |
190 | __SIGRTMIN + 17, | |
191 | __SIGRTMIN + 18, | |
192 | __SIGRTMIN + 19, | |
193 | __SIGRTMIN + 20, | |
194 | __SIGRTMIN + 21, | |
195 | __SIGRTMIN + 22, | |
196 | __SIGRTMIN + 23, | |
197 | __SIGRTMIN + 24, | |
198 | __SIGRTMIN + 25, | |
199 | __SIGRTMIN + 26, | |
200 | __SIGRTMIN + 27, | |
201 | __SIGRTMIN + 28, | |
202 | __SIGRTMIN + 29, | |
203 | __SIGRTMIN + 30, | |
204 | __SIGRTMIN + 31, | |
205 | -1, /* SIGCANCEL */ | |
206 | __SIGRTMIN, | |
207 | __SIGRTMIN + 32, | |
208 | __SIGRTMIN + 33, | |
209 | __SIGRTMIN + 34, | |
210 | __SIGRTMIN + 35, | |
211 | __SIGRTMIN + 36, | |
212 | __SIGRTMIN + 37, | |
213 | __SIGRTMIN + 38, | |
214 | __SIGRTMIN + 39, | |
215 | __SIGRTMIN + 40, | |
216 | __SIGRTMIN + 41, | |
217 | __SIGRTMIN + 42, | |
218 | __SIGRTMIN + 43, | |
219 | __SIGRTMIN + 44, | |
220 | __SIGRTMIN + 45, | |
221 | __SIGRTMIN + 46, | |
222 | __SIGRTMIN + 47, | |
223 | __SIGRTMIN + 48, | |
224 | __SIGRTMIN + 49, | |
225 | __SIGRTMIN + 50, | |
226 | __SIGRTMIN + 51, | |
227 | __SIGRTMIN + 52, | |
228 | __SIGRTMIN + 53, | |
229 | __SIGRTMIN + 54, | |
230 | __SIGRTMIN + 55, | |
231 | __SIGRTMIN + 56, | |
232 | __SIGRTMIN + 57, | |
233 | __SIGRTMIN + 58, | |
234 | __SIGRTMIN + 59, | |
235 | __SIGRTMIN + 60, | |
236 | __SIGRTMIN + 61, | |
237 | __SIGRTMIN + 62, | |
238 | __SIGRTMIN + 63, | |
239 | __SIGRTMIN + 64, | |
240 | __SIGRTMIN + 65, | |
241 | __SIGRTMIN + 66, | |
242 | __SIGRTMIN + 67, | |
243 | __SIGRTMIN + 68, | |
244 | __SIGRTMIN + 69, | |
245 | __SIGRTMIN + 70, | |
246 | __SIGRTMIN + 71, | |
247 | __SIGRTMIN + 72, | |
248 | __SIGRTMIN + 73, | |
249 | __SIGRTMIN + 74, | |
250 | __SIGRTMIN + 75, | |
251 | __SIGRTMIN + 76, | |
252 | __SIGRTMIN + 77, | |
253 | __SIGRTMIN + 78, | |
254 | __SIGRTMIN + 79, | |
255 | __SIGRTMIN + 80, | |
256 | __SIGRTMIN + 81, | |
257 | __SIGRTMIN + 82, | |
258 | __SIGRTMIN + 83, | |
259 | __SIGRTMIN + 84, | |
260 | __SIGRTMIN + 85, | |
261 | __SIGRTMIN + 86, | |
262 | __SIGRTMIN + 87, | |
263 | __SIGRTMIN + 88, | |
264 | __SIGRTMIN + 89, | |
265 | __SIGRTMIN + 90, | |
266 | __SIGRTMIN + 91, | |
267 | __SIGRTMIN + 92, | |
268 | __SIGRTMIN + 93, | |
269 | __SIGRTMIN + 94, | |
270 | __SIGRTMIN + 95, | |
271 | -1, /* SIGINFO */ | |
272 | -1, /* UNKNOWN */ | |
273 | -1, /* DEFAULT */ | |
274 | -1, | |
275 | -1, | |
276 | -1, | |
277 | -1, | |
278 | -1, | |
279 | -1 | |
c72d5bf8 | 280 | #endif |
ca587a8e | 281 | }; |
8f447cc7 | 282 | #else |
ca587a8e AJ |
283 | /* In system mode we only need SIGINT and SIGTRAP; other signals |
284 | are not yet supported. */ | |
285 | ||
286 | enum { | |
287 | TARGET_SIGINT = 2, | |
288 | TARGET_SIGTRAP = 5 | |
289 | }; | |
290 | ||
291 | static int gdb_signal_table[] = { | |
292 | -1, | |
293 | -1, | |
294 | TARGET_SIGINT, | |
295 | -1, | |
296 | -1, | |
297 | TARGET_SIGTRAP | |
298 | }; | |
299 | #endif | |
300 | ||
301 | #ifdef CONFIG_USER_ONLY | |
302 | static int target_signal_to_gdb (int sig) | |
303 | { | |
304 | int i; | |
305 | for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++) | |
306 | if (gdb_signal_table[i] == sig) | |
307 | return i; | |
308 | return GDB_SIGNAL_UNKNOWN; | |
309 | } | |
8f447cc7 | 310 | #endif |
b4608c04 | 311 | |
ca587a8e AJ |
312 | static int gdb_signal_to_target (int sig) |
313 | { | |
314 | if (sig < ARRAY_SIZE (gdb_signal_table)) | |
315 | return gdb_signal_table[sig]; | |
316 | else | |
317 | return -1; | |
318 | } | |
319 | ||
56aebc89 PB |
320 | typedef struct GDBRegisterState { |
321 | int base_reg; | |
322 | int num_regs; | |
a010bdbe AB |
323 | gdb_get_reg_cb get_reg; |
324 | gdb_set_reg_cb set_reg; | |
56aebc89 PB |
325 | const char *xml; |
326 | struct GDBRegisterState *next; | |
327 | } GDBRegisterState; | |
328 | ||
8f468636 LM |
329 | typedef struct GDBProcess { |
330 | uint32_t pid; | |
331 | bool attached; | |
c145eeae LM |
332 | |
333 | char target_xml[1024]; | |
8f468636 LM |
334 | } GDBProcess; |
335 | ||
858693c6 | 336 | enum RSState { |
36556b20 | 337 | RS_INACTIVE, |
858693c6 FB |
338 | RS_IDLE, |
339 | RS_GETLINE, | |
4bf43122 DG |
340 | RS_GETLINE_ESC, |
341 | RS_GETLINE_RLE, | |
858693c6 FB |
342 | RS_CHKSUM1, |
343 | RS_CHKSUM2, | |
344 | }; | |
858693c6 | 345 | typedef struct GDBState { |
8d98c445 | 346 | bool init; /* have we been initialised? */ |
2e0f2cfb AF |
347 | CPUState *c_cpu; /* current CPU for step/continue ops */ |
348 | CPUState *g_cpu; /* current CPU for other ops */ | |
52f34623 | 349 | CPUState *query_cpu; /* for q{f|s}ThreadInfo */ |
41625033 | 350 | enum RSState state; /* parsing state */ |
56aebc89 | 351 | char line_buf[MAX_PACKET_LENGTH]; |
858693c6 | 352 | int line_buf_index; |
4bf43122 DG |
353 | int line_sum; /* running checksum */ |
354 | int line_csum; /* checksum at the end of the packet */ | |
d116e813 | 355 | GByteArray *last_packet; |
1f487ee9 | 356 | int signal; |
41625033 | 357 | #ifdef CONFIG_USER_ONLY |
4046d913 | 358 | int fd; |
fcedd920 | 359 | char *socket_path; |
41625033 | 360 | int running_state; |
4046d913 | 361 | #else |
32a6ebec | 362 | CharBackend chr; |
0ec7b3e7 | 363 | Chardev *mon_chr; |
41625033 | 364 | #endif |
8f468636 LM |
365 | bool multiprocess; |
366 | GDBProcess *processes; | |
367 | int process_num; | |
cdb432b2 MI |
368 | char syscall_buf[256]; |
369 | gdb_syscall_complete_cb current_syscall_cb; | |
308f9e88 | 370 | GString *str_buf; |
4a25f1b9 | 371 | GByteArray *mem_buf; |
858693c6 | 372 | } GDBState; |
b4608c04 | 373 | |
60897d36 EI |
374 | /* By default use no IRQs and no timers while single stepping so as to |
375 | * make single stepping like an ICE HW step. | |
376 | */ | |
377 | static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; | |
378 | ||
fda8458b PD |
379 | /* Retrieves flags for single step mode. */ |
380 | static int get_sstep_flags(void) | |
381 | { | |
382 | /* | |
383 | * In replay mode all events written into the log should be replayed. | |
384 | * That is why NOIRQ flag is removed in this mode. | |
385 | */ | |
386 | if (replay_mode != REPLAY_MODE_NONE) { | |
387 | return SSTEP_ENABLE; | |
388 | } else { | |
389 | return sstep_flags; | |
390 | } | |
391 | } | |
392 | ||
8d98c445 AB |
393 | static GDBState gdbserver_state; |
394 | ||
395 | static void init_gdbserver_state(void) | |
396 | { | |
397 | g_assert(!gdbserver_state.init); | |
398 | memset(&gdbserver_state, 0, sizeof(GDBState)); | |
399 | gdbserver_state.init = true; | |
308f9e88 | 400 | gdbserver_state.str_buf = g_string_new(NULL); |
4a25f1b9 | 401 | gdbserver_state.mem_buf = g_byte_array_sized_new(MAX_PACKET_LENGTH); |
d116e813 | 402 | gdbserver_state.last_packet = g_byte_array_sized_new(MAX_PACKET_LENGTH + 4); |
8d98c445 AB |
403 | } |
404 | ||
405 | #ifndef CONFIG_USER_ONLY | |
406 | static void reset_gdbserver_state(void) | |
407 | { | |
408 | g_free(gdbserver_state.processes); | |
409 | gdbserver_state.processes = NULL; | |
410 | gdbserver_state.process_num = 0; | |
411 | } | |
412 | #endif | |
880a7578 | 413 | |
5b50e790 | 414 | bool gdb_has_xml; |
56aebc89 | 415 | |
1fddef4b | 416 | #ifdef CONFIG_USER_ONLY |
4046d913 | 417 | |
a346af3e | 418 | static int get_char(void) |
b4608c04 FB |
419 | { |
420 | uint8_t ch; | |
421 | int ret; | |
422 | ||
423 | for(;;) { | |
a346af3e | 424 | ret = qemu_recv(gdbserver_state.fd, &ch, 1, 0); |
b4608c04 | 425 | if (ret < 0) { |
1f487ee9 | 426 | if (errno == ECONNRESET) |
a346af3e | 427 | gdbserver_state.fd = -1; |
5819e3e0 | 428 | if (errno != EINTR) |
b4608c04 FB |
429 | return -1; |
430 | } else if (ret == 0) { | |
a346af3e AB |
431 | close(gdbserver_state.fd); |
432 | gdbserver_state.fd = -1; | |
b4608c04 FB |
433 | return -1; |
434 | } else { | |
435 | break; | |
436 | } | |
437 | } | |
438 | return ch; | |
439 | } | |
4046d913 | 440 | #endif |
b4608c04 | 441 | |
654efcf3 | 442 | static enum { |
a2d1ebaf PB |
443 | GDB_SYS_UNKNOWN, |
444 | GDB_SYS_ENABLED, | |
445 | GDB_SYS_DISABLED, | |
446 | } gdb_syscall_mode; | |
447 | ||
a38bb079 | 448 | /* Decide if either remote gdb syscalls or native file IO should be used. */ |
a2d1ebaf PB |
449 | int use_gdb_syscalls(void) |
450 | { | |
cfe67cef LA |
451 | SemihostingTarget target = semihosting_get_target(); |
452 | if (target == SEMIHOSTING_TARGET_NATIVE) { | |
a38bb079 LI |
453 | /* -semihosting-config target=native */ |
454 | return false; | |
cfe67cef | 455 | } else if (target == SEMIHOSTING_TARGET_GDB) { |
a38bb079 LI |
456 | /* -semihosting-config target=gdb */ |
457 | return true; | |
458 | } | |
459 | ||
460 | /* -semihosting-config target=auto */ | |
461 | /* On the first call check if gdb is connected and remember. */ | |
a2d1ebaf | 462 | if (gdb_syscall_mode == GDB_SYS_UNKNOWN) { |
8d98c445 AB |
463 | gdb_syscall_mode = gdbserver_state.init ? |
464 | GDB_SYS_ENABLED : GDB_SYS_DISABLED; | |
a2d1ebaf PB |
465 | } |
466 | return gdb_syscall_mode == GDB_SYS_ENABLED; | |
467 | } | |
468 | ||
ba70a624 | 469 | /* Resume execution. */ |
a346af3e | 470 | static inline void gdb_continue(void) |
ba70a624 | 471 | { |
5c9522b3 | 472 | |
ba70a624 | 473 | #ifdef CONFIG_USER_ONLY |
a346af3e | 474 | gdbserver_state.running_state = 1; |
5c9522b3 | 475 | trace_gdbstub_op_continue(); |
ba70a624 | 476 | #else |
26ac7a31 | 477 | if (!runstate_needs_reset()) { |
5c9522b3 | 478 | trace_gdbstub_op_continue(); |
87f25c12 PB |
479 | vm_start(); |
480 | } | |
ba70a624 EI |
481 | #endif |
482 | } | |
483 | ||
544177ad CI |
484 | /* |
485 | * Resume execution, per CPU actions. For user-mode emulation it's | |
486 | * equivalent to gdb_continue. | |
487 | */ | |
a346af3e | 488 | static int gdb_continue_partial(char *newstates) |
544177ad CI |
489 | { |
490 | CPUState *cpu; | |
491 | int res = 0; | |
492 | #ifdef CONFIG_USER_ONLY | |
493 | /* | |
494 | * This is not exactly accurate, but it's an improvement compared to the | |
495 | * previous situation, where only one CPU would be single-stepped. | |
496 | */ | |
497 | CPU_FOREACH(cpu) { | |
498 | if (newstates[cpu->cpu_index] == 's') { | |
5c9522b3 | 499 | trace_gdbstub_op_stepping(cpu->cpu_index); |
544177ad CI |
500 | cpu_single_step(cpu, sstep_flags); |
501 | } | |
502 | } | |
a346af3e | 503 | gdbserver_state.running_state = 1; |
544177ad CI |
504 | #else |
505 | int flag = 0; | |
506 | ||
507 | if (!runstate_needs_reset()) { | |
508 | if (vm_prepare_start()) { | |
509 | return 0; | |
510 | } | |
511 | ||
512 | CPU_FOREACH(cpu) { | |
513 | switch (newstates[cpu->cpu_index]) { | |
514 | case 0: | |
515 | case 1: | |
516 | break; /* nothing to do here */ | |
517 | case 's': | |
5c9522b3 | 518 | trace_gdbstub_op_stepping(cpu->cpu_index); |
fda8458b | 519 | cpu_single_step(cpu, get_sstep_flags()); |
544177ad CI |
520 | cpu_resume(cpu); |
521 | flag = 1; | |
522 | break; | |
523 | case 'c': | |
5c9522b3 | 524 | trace_gdbstub_op_continue_cpu(cpu->cpu_index); |
544177ad CI |
525 | cpu_resume(cpu); |
526 | flag = 1; | |
527 | break; | |
528 | default: | |
529 | res = -1; | |
530 | break; | |
531 | } | |
532 | } | |
533 | } | |
534 | if (flag) { | |
535 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); | |
536 | } | |
537 | #endif | |
538 | return res; | |
539 | } | |
540 | ||
a346af3e | 541 | static void put_buffer(const uint8_t *buf, int len) |
b4608c04 | 542 | { |
4046d913 | 543 | #ifdef CONFIG_USER_ONLY |
b4608c04 FB |
544 | int ret; |
545 | ||
546 | while (len > 0) { | |
a346af3e | 547 | ret = send(gdbserver_state.fd, buf, len, 0); |
b4608c04 | 548 | if (ret < 0) { |
5819e3e0 | 549 | if (errno != EINTR) |
b4608c04 FB |
550 | return; |
551 | } else { | |
552 | buf += ret; | |
553 | len -= ret; | |
554 | } | |
555 | } | |
4046d913 | 556 | #else |
6ab3fc32 DB |
557 | /* XXX this blocks entire thread. Rewrite to use |
558 | * qemu_chr_fe_write and background I/O callbacks */ | |
a346af3e | 559 | qemu_chr_fe_write_all(&gdbserver_state.chr, buf, len); |
4046d913 | 560 | #endif |
b4608c04 FB |
561 | } |
562 | ||
563 | static inline int fromhex(int v) | |
564 | { | |
565 | if (v >= '0' && v <= '9') | |
566 | return v - '0'; | |
567 | else if (v >= 'A' && v <= 'F') | |
568 | return v - 'A' + 10; | |
569 | else if (v >= 'a' && v <= 'f') | |
570 | return v - 'a' + 10; | |
571 | else | |
572 | return 0; | |
573 | } | |
574 | ||
575 | static inline int tohex(int v) | |
576 | { | |
577 | if (v < 10) | |
578 | return v + '0'; | |
579 | else | |
580 | return v - 10 + 'a'; | |
581 | } | |
582 | ||
9005774b | 583 | /* writes 2*len+1 bytes in buf */ |
308f9e88 | 584 | static void memtohex(GString *buf, const uint8_t *mem, int len) |
b4608c04 FB |
585 | { |
586 | int i, c; | |
b4608c04 FB |
587 | for(i = 0; i < len; i++) { |
588 | c = mem[i]; | |
308f9e88 AB |
589 | g_string_append_c(buf, tohex(c >> 4)); |
590 | g_string_append_c(buf, tohex(c & 0xf)); | |
b4608c04 | 591 | } |
308f9e88 | 592 | g_string_append_c(buf, '\0'); |
b4608c04 FB |
593 | } |
594 | ||
4a25f1b9 | 595 | static void hextomem(GByteArray *mem, const char *buf, int len) |
b4608c04 FB |
596 | { |
597 | int i; | |
598 | ||
599 | for(i = 0; i < len; i++) { | |
4a25f1b9 AB |
600 | guint8 byte = fromhex(buf[0]) << 4 | fromhex(buf[1]); |
601 | g_byte_array_append(mem, &byte, 1); | |
b4608c04 FB |
602 | buf += 2; |
603 | } | |
604 | } | |
605 | ||
5c9522b3 DG |
606 | static void hexdump(const char *buf, int len, |
607 | void (*trace_fn)(size_t ofs, char const *text)) | |
608 | { | |
609 | char line_buffer[3 * 16 + 4 + 16 + 1]; | |
610 | ||
611 | size_t i; | |
612 | for (i = 0; i < len || (i & 0xF); ++i) { | |
613 | size_t byte_ofs = i & 15; | |
614 | ||
615 | if (byte_ofs == 0) { | |
616 | memset(line_buffer, ' ', 3 * 16 + 4 + 16); | |
617 | line_buffer[3 * 16 + 4 + 16] = 0; | |
618 | } | |
619 | ||
620 | size_t col_group = (i >> 2) & 3; | |
621 | size_t hex_col = byte_ofs * 3 + col_group; | |
622 | size_t txt_col = 3 * 16 + 4 + byte_ofs; | |
623 | ||
624 | if (i < len) { | |
625 | char value = buf[i]; | |
626 | ||
627 | line_buffer[hex_col + 0] = tohex((value >> 4) & 0xF); | |
628 | line_buffer[hex_col + 1] = tohex((value >> 0) & 0xF); | |
629 | line_buffer[txt_col + 0] = (value >= ' ' && value < 127) | |
630 | ? value | |
631 | : '.'; | |
632 | } | |
633 | ||
634 | if (byte_ofs == 0xF) | |
635 | trace_fn(i & -16, line_buffer); | |
636 | } | |
637 | } | |
638 | ||
b4608c04 | 639 | /* return -1 if error, 0 if OK */ |
a346af3e | 640 | static int put_packet_binary(const char *buf, int len, bool dump) |
b4608c04 | 641 | { |
56aebc89 | 642 | int csum, i; |
d116e813 | 643 | uint8_t footer[3]; |
b4608c04 | 644 | |
5c9522b3 DG |
645 | if (dump && trace_event_get_state_backends(TRACE_GDBSTUB_IO_BINARYREPLY)) { |
646 | hexdump(buf, len, trace_gdbstub_io_binaryreply); | |
647 | } | |
648 | ||
b4608c04 | 649 | for(;;) { |
d116e813 DH |
650 | g_byte_array_set_size(gdbserver_state.last_packet, 0); |
651 | g_byte_array_append(gdbserver_state.last_packet, | |
652 | (const uint8_t *) "$", 1); | |
653 | g_byte_array_append(gdbserver_state.last_packet, | |
654 | (const uint8_t *) buf, len); | |
b4608c04 FB |
655 | csum = 0; |
656 | for(i = 0; i < len; i++) { | |
657 | csum += buf[i]; | |
658 | } | |
d116e813 DH |
659 | footer[0] = '#'; |
660 | footer[1] = tohex((csum >> 4) & 0xf); | |
661 | footer[2] = tohex((csum) & 0xf); | |
662 | g_byte_array_append(gdbserver_state.last_packet, footer, 3); | |
b4608c04 | 663 | |
d116e813 DH |
664 | put_buffer(gdbserver_state.last_packet->data, |
665 | gdbserver_state.last_packet->len); | |
b4608c04 | 666 | |
4046d913 | 667 | #ifdef CONFIG_USER_ONLY |
a346af3e | 668 | i = get_char(); |
4046d913 | 669 | if (i < 0) |
b4608c04 | 670 | return -1; |
4046d913 | 671 | if (i == '+') |
b4608c04 | 672 | break; |
4046d913 PB |
673 | #else |
674 | break; | |
675 | #endif | |
b4608c04 FB |
676 | } |
677 | return 0; | |
678 | } | |
679 | ||
56aebc89 | 680 | /* return -1 if error, 0 if OK */ |
a346af3e | 681 | static int put_packet(const char *buf) |
56aebc89 | 682 | { |
5c9522b3 | 683 | trace_gdbstub_io_reply(buf); |
79808573 | 684 | |
a346af3e | 685 | return put_packet_binary(buf, strlen(buf), false); |
56aebc89 PB |
686 | } |
687 | ||
308f9e88 AB |
688 | static void put_strbuf(void) |
689 | { | |
690 | put_packet(gdbserver_state.str_buf->str); | |
691 | } | |
692 | ||
56aebc89 | 693 | /* Encode data using the encoding for 'x' packets. */ |
308f9e88 | 694 | static void memtox(GString *buf, const char *mem, int len) |
56aebc89 | 695 | { |
56aebc89 PB |
696 | char c; |
697 | ||
698 | while (len--) { | |
699 | c = *(mem++); | |
700 | switch (c) { | |
701 | case '#': case '$': case '*': case '}': | |
308f9e88 AB |
702 | g_string_append_c(buf, '}'); |
703 | g_string_append_c(buf, c ^ 0x20); | |
56aebc89 PB |
704 | break; |
705 | default: | |
308f9e88 | 706 | g_string_append_c(buf, c); |
56aebc89 PB |
707 | break; |
708 | } | |
709 | } | |
56aebc89 | 710 | } |
f1ccf904 | 711 | |
a346af3e | 712 | static uint32_t gdb_get_cpu_pid(CPUState *cpu) |
1a227336 | 713 | { |
46f5abc0 PM |
714 | /* TODO: In user mode, we should use the task state PID */ |
715 | if (cpu->cluster_index == UNASSIGNED_CLUSTER_INDEX) { | |
1a227336 | 716 | /* Return the default process' PID */ |
a346af3e AB |
717 | int index = gdbserver_state.process_num - 1; |
718 | return gdbserver_state.processes[index].pid; | |
1a227336 | 719 | } |
46f5abc0 | 720 | return cpu->cluster_index + 1; |
1a227336 LM |
721 | } |
722 | ||
a346af3e | 723 | static GDBProcess *gdb_get_process(uint32_t pid) |
7d8c87da LM |
724 | { |
725 | int i; | |
726 | ||
727 | if (!pid) { | |
728 | /* 0 means any process, we take the first one */ | |
a346af3e | 729 | return &gdbserver_state.processes[0]; |
7d8c87da LM |
730 | } |
731 | ||
a346af3e AB |
732 | for (i = 0; i < gdbserver_state.process_num; i++) { |
733 | if (gdbserver_state.processes[i].pid == pid) { | |
734 | return &gdbserver_state.processes[i]; | |
7d8c87da LM |
735 | } |
736 | } | |
737 | ||
738 | return NULL; | |
739 | } | |
740 | ||
a346af3e | 741 | static GDBProcess *gdb_get_cpu_process(CPUState *cpu) |
7d8c87da | 742 | { |
a346af3e | 743 | return gdb_get_process(gdb_get_cpu_pid(cpu)); |
7d8c87da LM |
744 | } |
745 | ||
746 | static CPUState *find_cpu(uint32_t thread_id) | |
747 | { | |
748 | CPUState *cpu; | |
749 | ||
750 | CPU_FOREACH(cpu) { | |
751 | if (cpu_gdb_index(cpu) == thread_id) { | |
752 | return cpu; | |
753 | } | |
754 | } | |
755 | ||
756 | return NULL; | |
757 | } | |
758 | ||
a346af3e | 759 | static CPUState *get_first_cpu_in_process(GDBProcess *process) |
e40e5204 LM |
760 | { |
761 | CPUState *cpu; | |
762 | ||
763 | CPU_FOREACH(cpu) { | |
a346af3e | 764 | if (gdb_get_cpu_pid(cpu) == process->pid) { |
e40e5204 LM |
765 | return cpu; |
766 | } | |
767 | } | |
768 | ||
769 | return NULL; | |
770 | } | |
771 | ||
a346af3e | 772 | static CPUState *gdb_next_cpu_in_process(CPUState *cpu) |
e40e5204 | 773 | { |
a346af3e | 774 | uint32_t pid = gdb_get_cpu_pid(cpu); |
e40e5204 LM |
775 | cpu = CPU_NEXT(cpu); |
776 | ||
777 | while (cpu) { | |
a346af3e | 778 | if (gdb_get_cpu_pid(cpu) == pid) { |
e40e5204 LM |
779 | break; |
780 | } | |
781 | ||
782 | cpu = CPU_NEXT(cpu); | |
783 | } | |
784 | ||
785 | return cpu; | |
786 | } | |
787 | ||
e40e5204 | 788 | /* Return the cpu following @cpu, while ignoring unattached processes. */ |
a346af3e | 789 | static CPUState *gdb_next_attached_cpu(CPUState *cpu) |
e40e5204 LM |
790 | { |
791 | cpu = CPU_NEXT(cpu); | |
792 | ||
793 | while (cpu) { | |
a346af3e | 794 | if (gdb_get_cpu_process(cpu)->attached) { |
e40e5204 LM |
795 | break; |
796 | } | |
797 | ||
798 | cpu = CPU_NEXT(cpu); | |
799 | } | |
800 | ||
801 | return cpu; | |
802 | } | |
803 | ||
804 | /* Return the first attached cpu */ | |
a346af3e | 805 | static CPUState *gdb_first_attached_cpu(void) |
e40e5204 LM |
806 | { |
807 | CPUState *cpu = first_cpu; | |
a346af3e | 808 | GDBProcess *process = gdb_get_cpu_process(cpu); |
e40e5204 LM |
809 | |
810 | if (!process->attached) { | |
a346af3e | 811 | return gdb_next_attached_cpu(cpu); |
e40e5204 LM |
812 | } |
813 | ||
814 | return cpu; | |
815 | } | |
816 | ||
a346af3e | 817 | static CPUState *gdb_get_cpu(uint32_t pid, uint32_t tid) |
ab65eed3 LM |
818 | { |
819 | GDBProcess *process; | |
820 | CPUState *cpu; | |
821 | ||
822 | if (!pid && !tid) { | |
823 | /* 0 means any process/thread, we take the first attached one */ | |
a346af3e | 824 | return gdb_first_attached_cpu(); |
ab65eed3 LM |
825 | } else if (pid && !tid) { |
826 | /* any thread in a specific process */ | |
a346af3e | 827 | process = gdb_get_process(pid); |
ab65eed3 LM |
828 | |
829 | if (process == NULL) { | |
830 | return NULL; | |
831 | } | |
832 | ||
833 | if (!process->attached) { | |
834 | return NULL; | |
835 | } | |
836 | ||
a346af3e | 837 | return get_first_cpu_in_process(process); |
ab65eed3 LM |
838 | } else { |
839 | /* a specific thread */ | |
840 | cpu = find_cpu(tid); | |
841 | ||
842 | if (cpu == NULL) { | |
843 | return NULL; | |
844 | } | |
845 | ||
a346af3e | 846 | process = gdb_get_cpu_process(cpu); |
ab65eed3 LM |
847 | |
848 | if (pid && process->pid != pid) { | |
849 | return NULL; | |
850 | } | |
851 | ||
852 | if (!process->attached) { | |
853 | return NULL; | |
854 | } | |
855 | ||
856 | return cpu; | |
857 | } | |
858 | } | |
859 | ||
a346af3e AB |
860 | static const char *get_feature_xml(const char *p, const char **newp, |
861 | GDBProcess *process) | |
56aebc89 | 862 | { |
56aebc89 PB |
863 | size_t len; |
864 | int i; | |
865 | const char *name; | |
a346af3e | 866 | CPUState *cpu = get_first_cpu_in_process(process); |
c145eeae | 867 | CPUClass *cc = CPU_GET_CLASS(cpu); |
56aebc89 PB |
868 | |
869 | len = 0; | |
870 | while (p[len] && p[len] != ':') | |
871 | len++; | |
872 | *newp = p + len; | |
873 | ||
874 | name = NULL; | |
875 | if (strncmp(p, "target.xml", len) == 0) { | |
c145eeae LM |
876 | char *buf = process->target_xml; |
877 | const size_t buf_sz = sizeof(process->target_xml); | |
878 | ||
56aebc89 | 879 | /* Generate the XML description for this CPU. */ |
c145eeae | 880 | if (!buf[0]) { |
56aebc89 PB |
881 | GDBRegisterState *r; |
882 | ||
c145eeae | 883 | pstrcat(buf, buf_sz, |
b3820e6c DH |
884 | "<?xml version=\"1.0\"?>" |
885 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">" | |
886 | "<target>"); | |
887 | if (cc->gdb_arch_name) { | |
888 | gchar *arch = cc->gdb_arch_name(cpu); | |
c145eeae LM |
889 | pstrcat(buf, buf_sz, "<architecture>"); |
890 | pstrcat(buf, buf_sz, arch); | |
891 | pstrcat(buf, buf_sz, "</architecture>"); | |
b3820e6c DH |
892 | g_free(arch); |
893 | } | |
c145eeae LM |
894 | pstrcat(buf, buf_sz, "<xi:include href=\""); |
895 | pstrcat(buf, buf_sz, cc->gdb_core_xml_file); | |
896 | pstrcat(buf, buf_sz, "\"/>"); | |
eac8b355 | 897 | for (r = cpu->gdb_regs; r; r = r->next) { |
c145eeae LM |
898 | pstrcat(buf, buf_sz, "<xi:include href=\""); |
899 | pstrcat(buf, buf_sz, r->xml); | |
900 | pstrcat(buf, buf_sz, "\"/>"); | |
56aebc89 | 901 | } |
c145eeae | 902 | pstrcat(buf, buf_sz, "</target>"); |
56aebc89 | 903 | } |
c145eeae | 904 | return buf; |
56aebc89 | 905 | } |
200bf5b7 | 906 | if (cc->gdb_get_dynamic_xml) { |
200bf5b7 AB |
907 | char *xmlname = g_strndup(p, len); |
908 | const char *xml = cc->gdb_get_dynamic_xml(cpu, xmlname); | |
909 | ||
910 | g_free(xmlname); | |
911 | if (xml) { | |
912 | return xml; | |
913 | } | |
914 | } | |
56aebc89 PB |
915 | for (i = 0; ; i++) { |
916 | name = xml_builtin[i][0]; | |
917 | if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) | |
918 | break; | |
919 | } | |
920 | return name ? xml_builtin[i][1] : NULL; | |
921 | } | |
f1ccf904 | 922 | |
a010bdbe | 923 | static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg) |
56aebc89 | 924 | { |
a0e372f0 | 925 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 926 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 927 | GDBRegisterState *r; |
f1ccf904 | 928 | |
a0e372f0 | 929 | if (reg < cc->gdb_num_core_regs) { |
a010bdbe | 930 | return cc->gdb_read_register(cpu, buf, reg); |
a0e372f0 | 931 | } |
f1ccf904 | 932 | |
eac8b355 | 933 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 | 934 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
a010bdbe | 935 | return r->get_reg(env, buf, reg - r->base_reg); |
56aebc89 PB |
936 | } |
937 | } | |
938 | return 0; | |
f1ccf904 TS |
939 | } |
940 | ||
385b9f0e | 941 | static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
f1ccf904 | 942 | { |
a0e372f0 | 943 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 944 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 945 | GDBRegisterState *r; |
f1ccf904 | 946 | |
a0e372f0 | 947 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 948 | return cc->gdb_write_register(cpu, mem_buf, reg); |
a0e372f0 | 949 | } |
56aebc89 | 950 | |
eac8b355 | 951 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
952 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
953 | return r->set_reg(env, mem_buf, reg - r->base_reg); | |
954 | } | |
955 | } | |
6da41eaf FB |
956 | return 0; |
957 | } | |
958 | ||
56aebc89 PB |
959 | /* Register a supplemental set of CPU registers. If g_pos is nonzero it |
960 | specifies the first register number and these registers are included in | |
961 | a standard "g" packet. Direction is relative to gdb, i.e. get_reg is | |
962 | gdb reading a CPU register, and set_reg is gdb modifying a CPU register. | |
963 | */ | |
964 | ||
22169d41 | 965 | void gdb_register_coprocessor(CPUState *cpu, |
a010bdbe | 966 | gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg, |
22169d41 | 967 | int num_regs, const char *xml, int g_pos) |
6da41eaf | 968 | { |
56aebc89 PB |
969 | GDBRegisterState *s; |
970 | GDBRegisterState **p; | |
56aebc89 | 971 | |
eac8b355 | 972 | p = &cpu->gdb_regs; |
56aebc89 PB |
973 | while (*p) { |
974 | /* Check for duplicates. */ | |
975 | if (strcmp((*p)->xml, xml) == 0) | |
976 | return; | |
977 | p = &(*p)->next; | |
978 | } | |
9643c25f SW |
979 | |
980 | s = g_new0(GDBRegisterState, 1); | |
a0e372f0 | 981 | s->base_reg = cpu->gdb_num_regs; |
9643c25f SW |
982 | s->num_regs = num_regs; |
983 | s->get_reg = get_reg; | |
984 | s->set_reg = set_reg; | |
985 | s->xml = xml; | |
986 | ||
56aebc89 | 987 | /* Add to end of list. */ |
a0e372f0 | 988 | cpu->gdb_num_regs += num_regs; |
56aebc89 PB |
989 | *p = s; |
990 | if (g_pos) { | |
991 | if (g_pos != s->base_reg) { | |
7ae6c571 ZY |
992 | error_report("Error: Bad gdb register numbering for '%s', " |
993 | "expected %d got %d", xml, g_pos, s->base_reg); | |
35143f01 AF |
994 | } else { |
995 | cpu->gdb_num_g_regs = cpu->gdb_num_regs; | |
56aebc89 PB |
996 | } |
997 | } | |
6da41eaf FB |
998 | } |
999 | ||
a1d1bb31 | 1000 | #ifndef CONFIG_USER_ONLY |
2472b6c0 PM |
1001 | /* Translate GDB watchpoint type to a flags value for cpu_watchpoint_* */ |
1002 | static inline int xlat_gdb_type(CPUState *cpu, int gdbtype) | |
1003 | { | |
1004 | static const int xlat[] = { | |
1005 | [GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, | |
1006 | [GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, | |
1007 | [GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, | |
1008 | }; | |
1009 | ||
1010 | CPUClass *cc = CPU_GET_CLASS(cpu); | |
1011 | int cputype = xlat[gdbtype]; | |
1012 | ||
1013 | if (cc->gdb_stop_before_watchpoint) { | |
1014 | cputype |= BP_STOP_BEFORE_ACCESS; | |
1015 | } | |
1016 | return cputype; | |
1017 | } | |
a1d1bb31 AL |
1018 | #endif |
1019 | ||
77f6ce50 | 1020 | static int gdb_breakpoint_insert(int type, target_ulong addr, target_ulong len) |
a1d1bb31 | 1021 | { |
182735ef | 1022 | CPUState *cpu; |
880a7578 AL |
1023 | int err = 0; |
1024 | ||
62278814 | 1025 | if (kvm_enabled()) { |
8d98c445 | 1026 | return kvm_insert_breakpoint(gdbserver_state.c_cpu, addr, len, type); |
62278814 | 1027 | } |
e22a25c9 | 1028 | |
a1d1bb31 AL |
1029 | switch (type) { |
1030 | case GDB_BREAKPOINT_SW: | |
1031 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 1032 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
1033 | err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL); |
1034 | if (err) { | |
880a7578 | 1035 | break; |
b3310ab3 | 1036 | } |
880a7578 AL |
1037 | } |
1038 | return err; | |
a1d1bb31 AL |
1039 | #ifndef CONFIG_USER_ONLY |
1040 | case GDB_WATCHPOINT_WRITE: | |
1041 | case GDB_WATCHPOINT_READ: | |
1042 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 1043 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
1044 | err = cpu_watchpoint_insert(cpu, addr, len, |
1045 | xlat_gdb_type(cpu, type), NULL); | |
1046 | if (err) { | |
880a7578 | 1047 | break; |
2472b6c0 | 1048 | } |
880a7578 AL |
1049 | } |
1050 | return err; | |
a1d1bb31 AL |
1051 | #endif |
1052 | default: | |
1053 | return -ENOSYS; | |
1054 | } | |
1055 | } | |
1056 | ||
77f6ce50 | 1057 | static int gdb_breakpoint_remove(int type, target_ulong addr, target_ulong len) |
a1d1bb31 | 1058 | { |
182735ef | 1059 | CPUState *cpu; |
880a7578 AL |
1060 | int err = 0; |
1061 | ||
62278814 | 1062 | if (kvm_enabled()) { |
8d98c445 | 1063 | return kvm_remove_breakpoint(gdbserver_state.c_cpu, addr, len, type); |
62278814 | 1064 | } |
e22a25c9 | 1065 | |
a1d1bb31 AL |
1066 | switch (type) { |
1067 | case GDB_BREAKPOINT_SW: | |
1068 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 1069 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
1070 | err = cpu_breakpoint_remove(cpu, addr, BP_GDB); |
1071 | if (err) { | |
880a7578 | 1072 | break; |
b3310ab3 | 1073 | } |
880a7578 AL |
1074 | } |
1075 | return err; | |
a1d1bb31 AL |
1076 | #ifndef CONFIG_USER_ONLY |
1077 | case GDB_WATCHPOINT_WRITE: | |
1078 | case GDB_WATCHPOINT_READ: | |
1079 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 1080 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
1081 | err = cpu_watchpoint_remove(cpu, addr, len, |
1082 | xlat_gdb_type(cpu, type)); | |
880a7578 AL |
1083 | if (err) |
1084 | break; | |
1085 | } | |
1086 | return err; | |
a1d1bb31 AL |
1087 | #endif |
1088 | default: | |
1089 | return -ENOSYS; | |
1090 | } | |
1091 | } | |
1092 | ||
546f3c67 LM |
1093 | static inline void gdb_cpu_breakpoint_remove_all(CPUState *cpu) |
1094 | { | |
1095 | cpu_breakpoint_remove_all(cpu, BP_GDB); | |
1096 | #ifndef CONFIG_USER_ONLY | |
1097 | cpu_watchpoint_remove_all(cpu, BP_GDB); | |
1098 | #endif | |
1099 | } | |
1100 | ||
a346af3e | 1101 | static void gdb_process_breakpoint_remove_all(GDBProcess *p) |
546f3c67 | 1102 | { |
a346af3e | 1103 | CPUState *cpu = get_first_cpu_in_process(p); |
546f3c67 LM |
1104 | |
1105 | while (cpu) { | |
1106 | gdb_cpu_breakpoint_remove_all(cpu); | |
a346af3e | 1107 | cpu = gdb_next_cpu_in_process(cpu); |
546f3c67 LM |
1108 | } |
1109 | } | |
1110 | ||
880a7578 | 1111 | static void gdb_breakpoint_remove_all(void) |
a1d1bb31 | 1112 | { |
182735ef | 1113 | CPUState *cpu; |
880a7578 | 1114 | |
e22a25c9 | 1115 | if (kvm_enabled()) { |
8d98c445 | 1116 | kvm_remove_all_breakpoints(gdbserver_state.c_cpu); |
e22a25c9 AL |
1117 | return; |
1118 | } | |
1119 | ||
bdc44640 | 1120 | CPU_FOREACH(cpu) { |
546f3c67 | 1121 | gdb_cpu_breakpoint_remove_all(cpu); |
880a7578 | 1122 | } |
a1d1bb31 AL |
1123 | } |
1124 | ||
a346af3e | 1125 | static void gdb_set_cpu_pc(target_ulong pc) |
fab9d284 | 1126 | { |
a346af3e | 1127 | CPUState *cpu = gdbserver_state.c_cpu; |
f45748f1 AF |
1128 | |
1129 | cpu_synchronize_state(cpu); | |
4a2b24ed | 1130 | cpu_set_pc(cpu, pc); |
fab9d284 AJ |
1131 | } |
1132 | ||
308f9e88 | 1133 | static void gdb_append_thread_id(CPUState *cpu, GString *buf) |
1a227336 | 1134 | { |
a346af3e | 1135 | if (gdbserver_state.multiprocess) { |
308f9e88 AB |
1136 | g_string_append_printf(buf, "p%02x.%02x", |
1137 | gdb_get_cpu_pid(cpu), cpu_gdb_index(cpu)); | |
1a227336 | 1138 | } else { |
308f9e88 | 1139 | g_string_append_printf(buf, "%02x", cpu_gdb_index(cpu)); |
1a227336 | 1140 | } |
1a227336 LM |
1141 | } |
1142 | ||
7d8c87da LM |
1143 | typedef enum GDBThreadIdKind { |
1144 | GDB_ONE_THREAD = 0, | |
1145 | GDB_ALL_THREADS, /* One process, all threads */ | |
1146 | GDB_ALL_PROCESSES, | |
1147 | GDB_READ_THREAD_ERR | |
1148 | } GDBThreadIdKind; | |
1149 | ||
1150 | static GDBThreadIdKind read_thread_id(const char *buf, const char **end_buf, | |
1151 | uint32_t *pid, uint32_t *tid) | |
1152 | { | |
1153 | unsigned long p, t; | |
1154 | int ret; | |
1155 | ||
1156 | if (*buf == 'p') { | |
1157 | buf++; | |
1158 | ret = qemu_strtoul(buf, &buf, 16, &p); | |
1159 | ||
1160 | if (ret) { | |
1161 | return GDB_READ_THREAD_ERR; | |
1162 | } | |
1163 | ||
1164 | /* Skip '.' */ | |
1165 | buf++; | |
1166 | } else { | |
1167 | p = 1; | |
1168 | } | |
1169 | ||
1170 | ret = qemu_strtoul(buf, &buf, 16, &t); | |
1171 | ||
1172 | if (ret) { | |
1173 | return GDB_READ_THREAD_ERR; | |
1174 | } | |
1175 | ||
1176 | *end_buf = buf; | |
1177 | ||
1178 | if (p == -1) { | |
1179 | return GDB_ALL_PROCESSES; | |
1180 | } | |
1181 | ||
1182 | if (pid) { | |
1183 | *pid = p; | |
1184 | } | |
1185 | ||
1186 | if (t == -1) { | |
1187 | return GDB_ALL_THREADS; | |
1188 | } | |
1189 | ||
1190 | if (tid) { | |
1191 | *tid = t; | |
1192 | } | |
1193 | ||
1194 | return GDB_ONE_THREAD; | |
1195 | } | |
1196 | ||
544177ad CI |
1197 | /** |
1198 | * gdb_handle_vcont - Parses and handles a vCont packet. | |
1199 | * returns -ENOTSUP if a command is unsupported, -EINVAL or -ERANGE if there is | |
1200 | * a format error, 0 on success. | |
1201 | */ | |
a346af3e | 1202 | static int gdb_handle_vcont(const char *p) |
544177ad | 1203 | { |
e40e5204 | 1204 | int res, signal = 0; |
544177ad CI |
1205 | char cur_action; |
1206 | char *newstates; | |
1207 | unsigned long tmp; | |
e40e5204 LM |
1208 | uint32_t pid, tid; |
1209 | GDBProcess *process; | |
544177ad | 1210 | CPUState *cpu; |
c99ef792 | 1211 | GDBThreadIdKind kind; |
544177ad CI |
1212 | #ifdef CONFIG_USER_ONLY |
1213 | int max_cpus = 1; /* global variable max_cpus exists only in system mode */ | |
1214 | ||
1215 | CPU_FOREACH(cpu) { | |
1216 | max_cpus = max_cpus <= cpu->cpu_index ? cpu->cpu_index + 1 : max_cpus; | |
1217 | } | |
5cc8767d LX |
1218 | #else |
1219 | MachineState *ms = MACHINE(qdev_get_machine()); | |
1220 | unsigned int max_cpus = ms->smp.max_cpus; | |
544177ad CI |
1221 | #endif |
1222 | /* uninitialised CPUs stay 0 */ | |
1223 | newstates = g_new0(char, max_cpus); | |
1224 | ||
1225 | /* mark valid CPUs with 1 */ | |
1226 | CPU_FOREACH(cpu) { | |
1227 | newstates[cpu->cpu_index] = 1; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * res keeps track of what error we are returning, with -ENOTSUP meaning | |
1232 | * that the command is unknown or unsupported, thus returning an empty | |
1233 | * packet, while -EINVAL and -ERANGE cause an E22 packet, due to invalid, | |
1234 | * or incorrect parameters passed. | |
1235 | */ | |
1236 | res = 0; | |
1237 | while (*p) { | |
1238 | if (*p++ != ';') { | |
1239 | res = -ENOTSUP; | |
1240 | goto out; | |
1241 | } | |
1242 | ||
1243 | cur_action = *p++; | |
1244 | if (cur_action == 'C' || cur_action == 'S') { | |
95a5befc | 1245 | cur_action = qemu_tolower(cur_action); |
3ddd9036 | 1246 | res = qemu_strtoul(p, &p, 16, &tmp); |
544177ad CI |
1247 | if (res) { |
1248 | goto out; | |
1249 | } | |
1250 | signal = gdb_signal_to_target(tmp); | |
1251 | } else if (cur_action != 'c' && cur_action != 's') { | |
1252 | /* unknown/invalid/unsupported command */ | |
1253 | res = -ENOTSUP; | |
1254 | goto out; | |
1255 | } | |
e40e5204 | 1256 | |
c99ef792 LM |
1257 | if (*p == '\0' || *p == ';') { |
1258 | /* | |
1259 | * No thread specifier, action is on "all threads". The | |
1260 | * specification is unclear regarding the process to act on. We | |
1261 | * choose all processes. | |
1262 | */ | |
1263 | kind = GDB_ALL_PROCESSES; | |
1264 | } else if (*p++ == ':') { | |
1265 | kind = read_thread_id(p, &p, &pid, &tid); | |
1266 | } else { | |
e40e5204 LM |
1267 | res = -ENOTSUP; |
1268 | goto out; | |
1269 | } | |
1270 | ||
c99ef792 | 1271 | switch (kind) { |
e40e5204 LM |
1272 | case GDB_READ_THREAD_ERR: |
1273 | res = -EINVAL; | |
1274 | goto out; | |
1275 | ||
1276 | case GDB_ALL_PROCESSES: | |
a346af3e | 1277 | cpu = gdb_first_attached_cpu(); |
e40e5204 LM |
1278 | while (cpu) { |
1279 | if (newstates[cpu->cpu_index] == 1) { | |
1280 | newstates[cpu->cpu_index] = cur_action; | |
544177ad | 1281 | } |
e40e5204 | 1282 | |
a346af3e | 1283 | cpu = gdb_next_attached_cpu(cpu); |
544177ad | 1284 | } |
e40e5204 LM |
1285 | break; |
1286 | ||
1287 | case GDB_ALL_THREADS: | |
a346af3e | 1288 | process = gdb_get_process(pid); |
e40e5204 LM |
1289 | |
1290 | if (!process->attached) { | |
1291 | res = -EINVAL; | |
544177ad CI |
1292 | goto out; |
1293 | } | |
5a6a1ad1 | 1294 | |
a346af3e | 1295 | cpu = get_first_cpu_in_process(process); |
e40e5204 LM |
1296 | while (cpu) { |
1297 | if (newstates[cpu->cpu_index] == 1) { | |
1298 | newstates[cpu->cpu_index] = cur_action; | |
1299 | } | |
1300 | ||
a346af3e | 1301 | cpu = gdb_next_cpu_in_process(cpu); |
e40e5204 LM |
1302 | } |
1303 | break; | |
1304 | ||
1305 | case GDB_ONE_THREAD: | |
a346af3e | 1306 | cpu = gdb_get_cpu(pid, tid); |
544177ad | 1307 | |
544177ad | 1308 | /* invalid CPU/thread specified */ |
5a6a1ad1 | 1309 | if (!cpu) { |
544177ad CI |
1310 | res = -EINVAL; |
1311 | goto out; | |
1312 | } | |
5a6a1ad1 | 1313 | |
544177ad CI |
1314 | /* only use if no previous match occourred */ |
1315 | if (newstates[cpu->cpu_index] == 1) { | |
1316 | newstates[cpu->cpu_index] = cur_action; | |
1317 | } | |
e40e5204 | 1318 | break; |
544177ad CI |
1319 | } |
1320 | } | |
a346af3e AB |
1321 | gdbserver_state.signal = signal; |
1322 | gdb_continue_partial(newstates); | |
544177ad CI |
1323 | |
1324 | out: | |
1325 | g_free(newstates); | |
1326 | ||
1327 | return res; | |
1328 | } | |
1329 | ||
d14055dc JD |
1330 | typedef union GdbCmdVariant { |
1331 | const char *data; | |
1332 | uint8_t opcode; | |
1333 | unsigned long val_ul; | |
1334 | unsigned long long val_ull; | |
1335 | struct { | |
1336 | GDBThreadIdKind kind; | |
1337 | uint32_t pid; | |
1338 | uint32_t tid; | |
1339 | } thread_id; | |
1340 | } GdbCmdVariant; | |
1341 | ||
1342 | static const char *cmd_next_param(const char *param, const char delimiter) | |
1343 | { | |
1344 | static const char all_delimiters[] = ",;:="; | |
1345 | char curr_delimiters[2] = {0}; | |
1346 | const char *delimiters; | |
1347 | ||
1348 | if (delimiter == '?') { | |
1349 | delimiters = all_delimiters; | |
1350 | } else if (delimiter == '0') { | |
1351 | return strchr(param, '\0'); | |
1352 | } else if (delimiter == '.' && *param) { | |
1353 | return param + 1; | |
1354 | } else { | |
1355 | curr_delimiters[0] = delimiter; | |
1356 | delimiters = curr_delimiters; | |
1357 | } | |
1358 | ||
1359 | param += strcspn(param, delimiters); | |
1360 | if (*param) { | |
1361 | param++; | |
1362 | } | |
1363 | return param; | |
1364 | } | |
1365 | ||
1366 | static int cmd_parse_params(const char *data, const char *schema, | |
1367 | GdbCmdVariant *params, int *num_params) | |
1368 | { | |
1369 | int curr_param; | |
1370 | const char *curr_schema, *curr_data; | |
1371 | ||
1372 | *num_params = 0; | |
1373 | ||
1374 | if (!schema) { | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | curr_schema = schema; | |
1379 | curr_param = 0; | |
1380 | curr_data = data; | |
1381 | while (curr_schema[0] && curr_schema[1] && *curr_data) { | |
1382 | switch (curr_schema[0]) { | |
1383 | case 'l': | |
1384 | if (qemu_strtoul(curr_data, &curr_data, 16, | |
1385 | ¶ms[curr_param].val_ul)) { | |
1386 | return -EINVAL; | |
1387 | } | |
1388 | curr_param++; | |
1389 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
1390 | break; | |
1391 | case 'L': | |
1392 | if (qemu_strtou64(curr_data, &curr_data, 16, | |
1393 | (uint64_t *)¶ms[curr_param].val_ull)) { | |
1394 | return -EINVAL; | |
1395 | } | |
1396 | curr_param++; | |
1397 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
1398 | break; | |
1399 | case 's': | |
1400 | params[curr_param].data = curr_data; | |
1401 | curr_param++; | |
1402 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
1403 | break; | |
1404 | case 'o': | |
1405 | params[curr_param].opcode = *(uint8_t *)curr_data; | |
1406 | curr_param++; | |
1407 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
1408 | break; | |
1409 | case 't': | |
1410 | params[curr_param].thread_id.kind = | |
1411 | read_thread_id(curr_data, &curr_data, | |
1412 | ¶ms[curr_param].thread_id.pid, | |
1413 | ¶ms[curr_param].thread_id.tid); | |
1414 | curr_param++; | |
1415 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
1416 | break; | |
1417 | case '?': | |
1418 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
1419 | break; | |
1420 | default: | |
1421 | return -EINVAL; | |
1422 | } | |
1423 | curr_schema += 2; | |
1424 | } | |
1425 | ||
1426 | *num_params = curr_param; | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | typedef struct GdbCmdContext { | |
d14055dc JD |
1431 | GdbCmdVariant *params; |
1432 | int num_params; | |
d14055dc JD |
1433 | } GdbCmdContext; |
1434 | ||
1435 | typedef void (*GdbCmdHandler)(GdbCmdContext *gdb_ctx, void *user_ctx); | |
1436 | ||
1437 | /* | |
1438 | * cmd_startswith -> cmd is compared using startswith | |
1439 | * | |
1440 | * | |
1441 | * schema definitions: | |
1442 | * Each schema parameter entry consists of 2 chars, | |
1443 | * the first char represents the parameter type handling | |
1444 | * the second char represents the delimiter for the next parameter | |
1445 | * | |
1446 | * Currently supported schema types: | |
1447 | * 'l' -> unsigned long (stored in .val_ul) | |
1448 | * 'L' -> unsigned long long (stored in .val_ull) | |
1449 | * 's' -> string (stored in .data) | |
1450 | * 'o' -> single char (stored in .opcode) | |
1451 | * 't' -> thread id (stored in .thread_id) | |
1452 | * '?' -> skip according to delimiter | |
1453 | * | |
1454 | * Currently supported delimiters: | |
1455 | * '?' -> Stop at any delimiter (",;:=\0") | |
1456 | * '0' -> Stop at "\0" | |
1457 | * '.' -> Skip 1 char unless reached "\0" | |
1458 | * Any other value is treated as the delimiter value itself | |
1459 | */ | |
1460 | typedef struct GdbCmdParseEntry { | |
1461 | GdbCmdHandler handler; | |
1462 | const char *cmd; | |
1463 | bool cmd_startswith; | |
1464 | const char *schema; | |
1465 | } GdbCmdParseEntry; | |
1466 | ||
1467 | static inline int startswith(const char *string, const char *pattern) | |
1468 | { | |
1469 | return !strncmp(string, pattern, strlen(pattern)); | |
1470 | } | |
1471 | ||
a346af3e | 1472 | static int process_string_cmd(void *user_ctx, const char *data, |
d14055dc JD |
1473 | const GdbCmdParseEntry *cmds, int num_cmds) |
1474 | { | |
1475 | int i, schema_len, max_num_params = 0; | |
1476 | GdbCmdContext gdb_ctx; | |
1477 | ||
1478 | if (!cmds) { | |
1479 | return -1; | |
1480 | } | |
1481 | ||
1482 | for (i = 0; i < num_cmds; i++) { | |
1483 | const GdbCmdParseEntry *cmd = &cmds[i]; | |
1484 | g_assert(cmd->handler && cmd->cmd); | |
1485 | ||
1486 | if ((cmd->cmd_startswith && !startswith(data, cmd->cmd)) || | |
1487 | (!cmd->cmd_startswith && strcmp(cmd->cmd, data))) { | |
1488 | continue; | |
1489 | } | |
1490 | ||
1491 | if (cmd->schema) { | |
1492 | schema_len = strlen(cmd->schema); | |
1493 | if (schema_len % 2) { | |
1494 | return -2; | |
1495 | } | |
1496 | ||
1497 | max_num_params = schema_len / 2; | |
1498 | } | |
1499 | ||
1500 | gdb_ctx.params = | |
1501 | (GdbCmdVariant *)alloca(sizeof(*gdb_ctx.params) * max_num_params); | |
1502 | memset(gdb_ctx.params, 0, sizeof(*gdb_ctx.params) * max_num_params); | |
1503 | ||
1504 | if (cmd_parse_params(&data[strlen(cmd->cmd)], cmd->schema, | |
1505 | gdb_ctx.params, &gdb_ctx.num_params)) { | |
1506 | return -1; | |
1507 | } | |
1508 | ||
d14055dc JD |
1509 | cmd->handler(&gdb_ctx, user_ctx); |
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | return -1; | |
1514 | } | |
1515 | ||
a346af3e | 1516 | static void run_cmd_parser(const char *data, const GdbCmdParseEntry *cmd) |
3e2c1261 JD |
1517 | { |
1518 | if (!data) { | |
1519 | return; | |
1520 | } | |
1521 | ||
308f9e88 | 1522 | g_string_set_size(gdbserver_state.str_buf, 0); |
4a25f1b9 | 1523 | g_byte_array_set_size(gdbserver_state.mem_buf, 0); |
308f9e88 | 1524 | |
3e2c1261 JD |
1525 | /* In case there was an error during the command parsing we must |
1526 | * send a NULL packet to indicate the command is not supported */ | |
a346af3e AB |
1527 | if (process_string_cmd(NULL, data, cmd, 1)) { |
1528 | put_packet(""); | |
3e2c1261 JD |
1529 | } |
1530 | } | |
1531 | ||
1532 | static void handle_detach(GdbCmdContext *gdb_ctx, void *user_ctx) | |
1533 | { | |
1534 | GDBProcess *process; | |
3e2c1261 JD |
1535 | uint32_t pid = 1; |
1536 | ||
a346af3e | 1537 | if (gdbserver_state.multiprocess) { |
3e2c1261 | 1538 | if (!gdb_ctx->num_params) { |
a346af3e | 1539 | put_packet("E22"); |
3e2c1261 JD |
1540 | return; |
1541 | } | |
1542 | ||
1543 | pid = gdb_ctx->params[0].val_ul; | |
1544 | } | |
1545 | ||
a346af3e AB |
1546 | process = gdb_get_process(pid); |
1547 | gdb_process_breakpoint_remove_all(process); | |
3e2c1261 JD |
1548 | process->attached = false; |
1549 | ||
a346af3e AB |
1550 | if (pid == gdb_get_cpu_pid(gdbserver_state.c_cpu)) { |
1551 | gdbserver_state.c_cpu = gdb_first_attached_cpu(); | |
3e2c1261 JD |
1552 | } |
1553 | ||
a346af3e AB |
1554 | if (pid == gdb_get_cpu_pid(gdbserver_state.g_cpu)) { |
1555 | gdbserver_state.g_cpu = gdb_first_attached_cpu(); | |
3e2c1261 JD |
1556 | } |
1557 | ||
a346af3e | 1558 | if (!gdbserver_state.c_cpu) { |
3e2c1261 JD |
1559 | /* No more process attached */ |
1560 | gdb_syscall_mode = GDB_SYS_DISABLED; | |
a346af3e | 1561 | gdb_continue(); |
3e2c1261 | 1562 | } |
a346af3e | 1563 | put_packet("OK"); |
3e2c1261 JD |
1564 | } |
1565 | ||
44ffded0 JD |
1566 | static void handle_thread_alive(GdbCmdContext *gdb_ctx, void *user_ctx) |
1567 | { | |
1568 | CPUState *cpu; | |
1569 | ||
1570 | if (!gdb_ctx->num_params) { | |
a346af3e | 1571 | put_packet("E22"); |
44ffded0 JD |
1572 | return; |
1573 | } | |
1574 | ||
1575 | if (gdb_ctx->params[0].thread_id.kind == GDB_READ_THREAD_ERR) { | |
a346af3e | 1576 | put_packet("E22"); |
44ffded0 JD |
1577 | return; |
1578 | } | |
1579 | ||
a346af3e | 1580 | cpu = gdb_get_cpu(gdb_ctx->params[0].thread_id.pid, |
44ffded0 JD |
1581 | gdb_ctx->params[0].thread_id.tid); |
1582 | if (!cpu) { | |
a346af3e | 1583 | put_packet("E22"); |
44ffded0 JD |
1584 | return; |
1585 | } | |
1586 | ||
a346af3e | 1587 | put_packet("OK"); |
44ffded0 JD |
1588 | } |
1589 | ||
4d6e3fe2 JD |
1590 | static void handle_continue(GdbCmdContext *gdb_ctx, void *user_ctx) |
1591 | { | |
1592 | if (gdb_ctx->num_params) { | |
a346af3e | 1593 | gdb_set_cpu_pc(gdb_ctx->params[0].val_ull); |
4d6e3fe2 JD |
1594 | } |
1595 | ||
a346af3e AB |
1596 | gdbserver_state.signal = 0; |
1597 | gdb_continue(); | |
4d6e3fe2 JD |
1598 | } |
1599 | ||
ccc47d5d JD |
1600 | static void handle_cont_with_sig(GdbCmdContext *gdb_ctx, void *user_ctx) |
1601 | { | |
1602 | unsigned long signal = 0; | |
1603 | ||
1604 | /* | |
1605 | * Note: C sig;[addr] is currently unsupported and we simply | |
1606 | * omit the addr parameter | |
1607 | */ | |
1608 | if (gdb_ctx->num_params) { | |
1609 | signal = gdb_ctx->params[0].val_ul; | |
1610 | } | |
1611 | ||
a346af3e AB |
1612 | gdbserver_state.signal = gdb_signal_to_target(signal); |
1613 | if (gdbserver_state.signal == -1) { | |
1614 | gdbserver_state.signal = 0; | |
ccc47d5d | 1615 | } |
a346af3e | 1616 | gdb_continue(); |
ccc47d5d JD |
1617 | } |
1618 | ||
3a9651d6 JD |
1619 | static void handle_set_thread(GdbCmdContext *gdb_ctx, void *user_ctx) |
1620 | { | |
1621 | CPUState *cpu; | |
1622 | ||
1623 | if (gdb_ctx->num_params != 2) { | |
a346af3e | 1624 | put_packet("E22"); |
3a9651d6 JD |
1625 | return; |
1626 | } | |
1627 | ||
1628 | if (gdb_ctx->params[1].thread_id.kind == GDB_READ_THREAD_ERR) { | |
a346af3e | 1629 | put_packet("E22"); |
3a9651d6 JD |
1630 | return; |
1631 | } | |
1632 | ||
1633 | if (gdb_ctx->params[1].thread_id.kind != GDB_ONE_THREAD) { | |
a346af3e | 1634 | put_packet("OK"); |
3a9651d6 JD |
1635 | return; |
1636 | } | |
1637 | ||
a346af3e | 1638 | cpu = gdb_get_cpu(gdb_ctx->params[1].thread_id.pid, |
3a9651d6 JD |
1639 | gdb_ctx->params[1].thread_id.tid); |
1640 | if (!cpu) { | |
a346af3e | 1641 | put_packet("E22"); |
3a9651d6 JD |
1642 | return; |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * Note: This command is deprecated and modern gdb's will be using the | |
1647 | * vCont command instead. | |
1648 | */ | |
1649 | switch (gdb_ctx->params[0].opcode) { | |
1650 | case 'c': | |
a346af3e AB |
1651 | gdbserver_state.c_cpu = cpu; |
1652 | put_packet("OK"); | |
3a9651d6 JD |
1653 | break; |
1654 | case 'g': | |
a346af3e AB |
1655 | gdbserver_state.g_cpu = cpu; |
1656 | put_packet("OK"); | |
3a9651d6 JD |
1657 | break; |
1658 | default: | |
a346af3e | 1659 | put_packet("E22"); |
3a9651d6 JD |
1660 | break; |
1661 | } | |
1662 | } | |
1663 | ||
77f6ce50 JD |
1664 | static void handle_insert_bp(GdbCmdContext *gdb_ctx, void *user_ctx) |
1665 | { | |
1666 | int res; | |
1667 | ||
1668 | if (gdb_ctx->num_params != 3) { | |
a346af3e | 1669 | put_packet("E22"); |
77f6ce50 JD |
1670 | return; |
1671 | } | |
1672 | ||
1673 | res = gdb_breakpoint_insert(gdb_ctx->params[0].val_ul, | |
1674 | gdb_ctx->params[1].val_ull, | |
1675 | gdb_ctx->params[2].val_ull); | |
1676 | if (res >= 0) { | |
a346af3e | 1677 | put_packet("OK"); |
77f6ce50 JD |
1678 | return; |
1679 | } else if (res == -ENOSYS) { | |
a346af3e | 1680 | put_packet(""); |
77f6ce50 JD |
1681 | return; |
1682 | } | |
1683 | ||
a346af3e | 1684 | put_packet("E22"); |
77f6ce50 JD |
1685 | } |
1686 | ||
1687 | static void handle_remove_bp(GdbCmdContext *gdb_ctx, void *user_ctx) | |
1688 | { | |
1689 | int res; | |
1690 | ||
1691 | if (gdb_ctx->num_params != 3) { | |
a346af3e | 1692 | put_packet("E22"); |
77f6ce50 JD |
1693 | return; |
1694 | } | |
1695 | ||
1696 | res = gdb_breakpoint_remove(gdb_ctx->params[0].val_ul, | |
1697 | gdb_ctx->params[1].val_ull, | |
1698 | gdb_ctx->params[2].val_ull); | |
1699 | if (res >= 0) { | |
a346af3e | 1700 | put_packet("OK"); |
77f6ce50 JD |
1701 | return; |
1702 | } else if (res == -ENOSYS) { | |
a346af3e | 1703 | put_packet(""); |
77f6ce50 JD |
1704 | return; |
1705 | } | |
1706 | ||
a346af3e | 1707 | put_packet("E22"); |
77f6ce50 JD |
1708 | } |
1709 | ||
94b2a62b AB |
1710 | /* |
1711 | * handle_set/get_reg | |
1712 | * | |
1713 | * Older gdb are really dumb, and don't use 'G/g' if 'P/p' is available. | |
1714 | * This works, but can be very slow. Anything new enough to understand | |
1715 | * XML also knows how to use this properly. However to use this we | |
1716 | * need to define a local XML file as well as be talking to a | |
1717 | * reasonably modern gdb. Responding with an empty packet will cause | |
1718 | * the remote gdb to fallback to older methods. | |
1719 | */ | |
1720 | ||
62b3320b JD |
1721 | static void handle_set_reg(GdbCmdContext *gdb_ctx, void *user_ctx) |
1722 | { | |
1723 | int reg_size; | |
1724 | ||
1725 | if (!gdb_has_xml) { | |
a346af3e | 1726 | put_packet(""); |
62b3320b JD |
1727 | return; |
1728 | } | |
1729 | ||
1730 | if (gdb_ctx->num_params != 2) { | |
a346af3e | 1731 | put_packet("E22"); |
62b3320b JD |
1732 | return; |
1733 | } | |
1734 | ||
1735 | reg_size = strlen(gdb_ctx->params[1].data) / 2; | |
4a25f1b9 AB |
1736 | hextomem(gdbserver_state.mem_buf, gdb_ctx->params[1].data, reg_size); |
1737 | gdb_write_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf->data, | |
62b3320b | 1738 | gdb_ctx->params[0].val_ull); |
a346af3e | 1739 | put_packet("OK"); |
62b3320b JD |
1740 | } |
1741 | ||
5d0e57bd JD |
1742 | static void handle_get_reg(GdbCmdContext *gdb_ctx, void *user_ctx) |
1743 | { | |
1744 | int reg_size; | |
1745 | ||
5d0e57bd | 1746 | if (!gdb_has_xml) { |
a346af3e | 1747 | put_packet(""); |
5d0e57bd JD |
1748 | return; |
1749 | } | |
1750 | ||
1751 | if (!gdb_ctx->num_params) { | |
a346af3e | 1752 | put_packet("E14"); |
5d0e57bd JD |
1753 | return; |
1754 | } | |
1755 | ||
4a25f1b9 | 1756 | reg_size = gdb_read_register(gdbserver_state.g_cpu, |
a010bdbe | 1757 | gdbserver_state.mem_buf, |
5d0e57bd JD |
1758 | gdb_ctx->params[0].val_ull); |
1759 | if (!reg_size) { | |
a346af3e | 1760 | put_packet("E14"); |
5d0e57bd | 1761 | return; |
4a25f1b9 AB |
1762 | } else { |
1763 | g_byte_array_set_size(gdbserver_state.mem_buf, reg_size); | |
5d0e57bd JD |
1764 | } |
1765 | ||
4a25f1b9 | 1766 | memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, reg_size); |
308f9e88 | 1767 | put_strbuf(); |
5d0e57bd JD |
1768 | } |
1769 | ||
cc0ecc78 JD |
1770 | static void handle_write_mem(GdbCmdContext *gdb_ctx, void *user_ctx) |
1771 | { | |
1772 | if (gdb_ctx->num_params != 3) { | |
a346af3e | 1773 | put_packet("E22"); |
cc0ecc78 JD |
1774 | return; |
1775 | } | |
1776 | ||
1777 | /* hextomem() reads 2*len bytes */ | |
1778 | if (gdb_ctx->params[1].val_ull > strlen(gdb_ctx->params[2].data) / 2) { | |
a346af3e | 1779 | put_packet("E22"); |
cc0ecc78 JD |
1780 | return; |
1781 | } | |
1782 | ||
4a25f1b9 | 1783 | hextomem(gdbserver_state.mem_buf, gdb_ctx->params[2].data, |
cc0ecc78 | 1784 | gdb_ctx->params[1].val_ull); |
a346af3e | 1785 | if (target_memory_rw_debug(gdbserver_state.g_cpu, gdb_ctx->params[0].val_ull, |
4a25f1b9 AB |
1786 | gdbserver_state.mem_buf->data, |
1787 | gdbserver_state.mem_buf->len, true)) { | |
a346af3e | 1788 | put_packet("E14"); |
cc0ecc78 JD |
1789 | return; |
1790 | } | |
1791 | ||
a346af3e | 1792 | put_packet("OK"); |
cc0ecc78 JD |
1793 | } |
1794 | ||
da92e236 JD |
1795 | static void handle_read_mem(GdbCmdContext *gdb_ctx, void *user_ctx) |
1796 | { | |
1797 | if (gdb_ctx->num_params != 2) { | |
a346af3e | 1798 | put_packet("E22"); |
da92e236 JD |
1799 | return; |
1800 | } | |
1801 | ||
1802 | /* memtohex() doubles the required space */ | |
1803 | if (gdb_ctx->params[1].val_ull > MAX_PACKET_LENGTH / 2) { | |
a346af3e | 1804 | put_packet("E22"); |
da92e236 JD |
1805 | return; |
1806 | } | |
1807 | ||
4a25f1b9 AB |
1808 | g_byte_array_set_size(gdbserver_state.mem_buf, gdb_ctx->params[1].val_ull); |
1809 | ||
a346af3e | 1810 | if (target_memory_rw_debug(gdbserver_state.g_cpu, gdb_ctx->params[0].val_ull, |
4a25f1b9 AB |
1811 | gdbserver_state.mem_buf->data, |
1812 | gdbserver_state.mem_buf->len, false)) { | |
a346af3e | 1813 | put_packet("E14"); |
da92e236 JD |
1814 | return; |
1815 | } | |
1816 | ||
4a25f1b9 AB |
1817 | memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, |
1818 | gdbserver_state.mem_buf->len); | |
308f9e88 | 1819 | put_strbuf(); |
da92e236 JD |
1820 | } |
1821 | ||
287ca120 JD |
1822 | static void handle_write_all_regs(GdbCmdContext *gdb_ctx, void *user_ctx) |
1823 | { | |
1824 | target_ulong addr, len; | |
1825 | uint8_t *registers; | |
1826 | int reg_size; | |
1827 | ||
1828 | if (!gdb_ctx->num_params) { | |
1829 | return; | |
1830 | } | |
1831 | ||
a346af3e | 1832 | cpu_synchronize_state(gdbserver_state.g_cpu); |
287ca120 | 1833 | len = strlen(gdb_ctx->params[0].data) / 2; |
4a25f1b9 AB |
1834 | hextomem(gdbserver_state.mem_buf, gdb_ctx->params[0].data, len); |
1835 | registers = gdbserver_state.mem_buf->data; | |
a346af3e | 1836 | for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0; |
287ca120 | 1837 | addr++) { |
a346af3e | 1838 | reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, addr); |
287ca120 JD |
1839 | len -= reg_size; |
1840 | registers += reg_size; | |
1841 | } | |
a346af3e | 1842 | put_packet("OK"); |
287ca120 JD |
1843 | } |
1844 | ||
397d1370 JD |
1845 | static void handle_read_all_regs(GdbCmdContext *gdb_ctx, void *user_ctx) |
1846 | { | |
1847 | target_ulong addr, len; | |
1848 | ||
a346af3e | 1849 | cpu_synchronize_state(gdbserver_state.g_cpu); |
a010bdbe | 1850 | g_byte_array_set_size(gdbserver_state.mem_buf, 0); |
397d1370 | 1851 | len = 0; |
a346af3e | 1852 | for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs; addr++) { |
4a25f1b9 | 1853 | len += gdb_read_register(gdbserver_state.g_cpu, |
a010bdbe | 1854 | gdbserver_state.mem_buf, |
397d1370 JD |
1855 | addr); |
1856 | } | |
a010bdbe | 1857 | g_assert(len == gdbserver_state.mem_buf->len); |
397d1370 | 1858 | |
4a25f1b9 | 1859 | memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len); |
308f9e88 | 1860 | put_strbuf(); |
397d1370 JD |
1861 | } |
1862 | ||
4b20fab1 JD |
1863 | static void handle_file_io(GdbCmdContext *gdb_ctx, void *user_ctx) |
1864 | { | |
a346af3e | 1865 | if (gdb_ctx->num_params >= 1 && gdbserver_state.current_syscall_cb) { |
4b20fab1 JD |
1866 | target_ulong ret, err; |
1867 | ||
1868 | ret = (target_ulong)gdb_ctx->params[0].val_ull; | |
c6ee9521 SL |
1869 | if (gdb_ctx->num_params >= 2) { |
1870 | err = (target_ulong)gdb_ctx->params[1].val_ull; | |
1871 | } else { | |
1872 | err = 0; | |
1873 | } | |
a346af3e AB |
1874 | gdbserver_state.current_syscall_cb(gdbserver_state.c_cpu, ret, err); |
1875 | gdbserver_state.current_syscall_cb = NULL; | |
4b20fab1 JD |
1876 | } |
1877 | ||
1878 | if (gdb_ctx->num_params >= 3 && gdb_ctx->params[2].opcode == (uint8_t)'C') { | |
a346af3e | 1879 | put_packet("T02"); |
4b20fab1 JD |
1880 | return; |
1881 | } | |
1882 | ||
a346af3e | 1883 | gdb_continue(); |
4b20fab1 JD |
1884 | } |
1885 | ||
933f80dd JD |
1886 | static void handle_step(GdbCmdContext *gdb_ctx, void *user_ctx) |
1887 | { | |
1888 | if (gdb_ctx->num_params) { | |
a346af3e | 1889 | gdb_set_cpu_pc((target_ulong)gdb_ctx->params[0].val_ull); |
933f80dd JD |
1890 | } |
1891 | ||
fda8458b | 1892 | cpu_single_step(gdbserver_state.c_cpu, get_sstep_flags()); |
a346af3e | 1893 | gdb_continue(); |
933f80dd JD |
1894 | } |
1895 | ||
fda8458b PD |
1896 | static void handle_backward(GdbCmdContext *gdb_ctx, void *user_ctx) |
1897 | { | |
1898 | if (replay_mode != REPLAY_MODE_PLAY) { | |
1899 | put_packet("E22"); | |
1900 | } | |
1901 | if (gdb_ctx->num_params == 1) { | |
1902 | switch (gdb_ctx->params[0].opcode) { | |
1903 | case 's': | |
1904 | if (replay_reverse_step()) { | |
1905 | gdb_continue(); | |
1906 | } else { | |
1907 | put_packet("E14"); | |
1908 | } | |
1909 | return; | |
cda38259 PD |
1910 | case 'c': |
1911 | if (replay_reverse_continue()) { | |
1912 | gdb_continue(); | |
1913 | } else { | |
1914 | put_packet("E14"); | |
1915 | } | |
1916 | return; | |
fda8458b PD |
1917 | } |
1918 | } | |
1919 | ||
1920 | /* Default invalid command */ | |
1921 | put_packet(""); | |
1922 | } | |
1923 | ||
8536ec02 JD |
1924 | static void handle_v_cont_query(GdbCmdContext *gdb_ctx, void *user_ctx) |
1925 | { | |
a346af3e | 1926 | put_packet("vCont;c;C;s;S"); |
8536ec02 JD |
1927 | } |
1928 | ||
1929 | static void handle_v_cont(GdbCmdContext *gdb_ctx, void *user_ctx) | |
1930 | { | |
1931 | int res; | |
1932 | ||
1933 | if (!gdb_ctx->num_params) { | |
1934 | return; | |
1935 | } | |
1936 | ||
a346af3e | 1937 | res = gdb_handle_vcont(gdb_ctx->params[0].data); |
8536ec02 | 1938 | if ((res == -EINVAL) || (res == -ERANGE)) { |
a346af3e | 1939 | put_packet("E22"); |
8536ec02 | 1940 | } else if (res) { |
a346af3e | 1941 | put_packet(""); |
8536ec02 JD |
1942 | } |
1943 | } | |
1944 | ||
1945 | static void handle_v_attach(GdbCmdContext *gdb_ctx, void *user_ctx) | |
1946 | { | |
1947 | GDBProcess *process; | |
1948 | CPUState *cpu; | |
8536ec02 | 1949 | |
308f9e88 | 1950 | g_string_assign(gdbserver_state.str_buf, "E22"); |
8536ec02 JD |
1951 | if (!gdb_ctx->num_params) { |
1952 | goto cleanup; | |
1953 | } | |
1954 | ||
a346af3e | 1955 | process = gdb_get_process(gdb_ctx->params[0].val_ul); |
8536ec02 JD |
1956 | if (!process) { |
1957 | goto cleanup; | |
1958 | } | |
1959 | ||
a346af3e | 1960 | cpu = get_first_cpu_in_process(process); |
8536ec02 JD |
1961 | if (!cpu) { |
1962 | goto cleanup; | |
1963 | } | |
1964 | ||
1965 | process->attached = true; | |
a346af3e AB |
1966 | gdbserver_state.g_cpu = cpu; |
1967 | gdbserver_state.c_cpu = cpu; | |
8536ec02 | 1968 | |
308f9e88 AB |
1969 | g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP); |
1970 | gdb_append_thread_id(cpu, gdbserver_state.str_buf); | |
1971 | g_string_append_c(gdbserver_state.str_buf, ';'); | |
8536ec02 | 1972 | cleanup: |
308f9e88 | 1973 | put_strbuf(); |
8536ec02 JD |
1974 | } |
1975 | ||
1976 | static void handle_v_kill(GdbCmdContext *gdb_ctx, void *user_ctx) | |
1977 | { | |
1978 | /* Kill the target */ | |
a346af3e | 1979 | put_packet("OK"); |
8536ec02 | 1980 | error_report("QEMU: Terminated via GDBstub"); |
b9e10c6c | 1981 | gdb_exit(0); |
8536ec02 JD |
1982 | exit(0); |
1983 | } | |
1984 | ||
1985 | static GdbCmdParseEntry gdb_v_commands_table[] = { | |
1986 | /* Order is important if has same prefix */ | |
1987 | { | |
1988 | .handler = handle_v_cont_query, | |
1989 | .cmd = "Cont?", | |
1990 | .cmd_startswith = 1 | |
1991 | }, | |
1992 | { | |
1993 | .handler = handle_v_cont, | |
1994 | .cmd = "Cont", | |
1995 | .cmd_startswith = 1, | |
1996 | .schema = "s0" | |
1997 | }, | |
1998 | { | |
1999 | .handler = handle_v_attach, | |
2000 | .cmd = "Attach;", | |
2001 | .cmd_startswith = 1, | |
2002 | .schema = "l0" | |
2003 | }, | |
2004 | { | |
2005 | .handler = handle_v_kill, | |
2006 | .cmd = "Kill;", | |
2007 | .cmd_startswith = 1 | |
2008 | }, | |
2009 | }; | |
2010 | ||
2011 | static void handle_v_commands(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2012 | { | |
2013 | if (!gdb_ctx->num_params) { | |
2014 | return; | |
2015 | } | |
2016 | ||
a346af3e | 2017 | if (process_string_cmd(NULL, gdb_ctx->params[0].data, |
8536ec02 JD |
2018 | gdb_v_commands_table, |
2019 | ARRAY_SIZE(gdb_v_commands_table))) { | |
a346af3e | 2020 | put_packet(""); |
8536ec02 JD |
2021 | } |
2022 | } | |
2023 | ||
2704efad JD |
2024 | static void handle_query_qemu_sstepbits(GdbCmdContext *gdb_ctx, void *user_ctx) |
2025 | { | |
308f9e88 AB |
2026 | g_string_printf(gdbserver_state.str_buf, "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
2027 | SSTEP_ENABLE, SSTEP_NOIRQ, SSTEP_NOTIMER); | |
2028 | put_strbuf(); | |
2704efad JD |
2029 | } |
2030 | ||
2031 | static void handle_set_qemu_sstep(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2032 | { | |
2033 | if (!gdb_ctx->num_params) { | |
2034 | return; | |
2035 | } | |
2036 | ||
2037 | sstep_flags = gdb_ctx->params[0].val_ul; | |
a346af3e | 2038 | put_packet("OK"); |
2704efad JD |
2039 | } |
2040 | ||
2041 | static void handle_query_qemu_sstep(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2042 | { | |
308f9e88 AB |
2043 | g_string_printf(gdbserver_state.str_buf, "0x%x", sstep_flags); |
2044 | put_strbuf(); | |
2704efad JD |
2045 | } |
2046 | ||
2047 | static void handle_query_curr_tid(GdbCmdContext *gdb_ctx, void *user_ctx) | |
b4608c04 | 2048 | { |
2e0f2cfb | 2049 | CPUState *cpu; |
2704efad | 2050 | GDBProcess *process; |
2704efad JD |
2051 | |
2052 | /* | |
2053 | * "Current thread" remains vague in the spec, so always return | |
2054 | * the first thread of the current process (gdb returns the | |
2055 | * first thread). | |
2056 | */ | |
a346af3e AB |
2057 | process = gdb_get_cpu_process(gdbserver_state.g_cpu); |
2058 | cpu = get_first_cpu_in_process(process); | |
308f9e88 AB |
2059 | g_string_assign(gdbserver_state.str_buf, "QC"); |
2060 | gdb_append_thread_id(cpu, gdbserver_state.str_buf); | |
2061 | put_strbuf(); | |
2704efad JD |
2062 | } |
2063 | ||
2064 | static void handle_query_threads(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2065 | { | |
a346af3e AB |
2066 | if (!gdbserver_state.query_cpu) { |
2067 | put_packet("l"); | |
2704efad JD |
2068 | return; |
2069 | } | |
2070 | ||
308f9e88 AB |
2071 | g_string_assign(gdbserver_state.str_buf, "m"); |
2072 | gdb_append_thread_id(gdbserver_state.query_cpu, gdbserver_state.str_buf); | |
2073 | put_strbuf(); | |
a346af3e | 2074 | gdbserver_state.query_cpu = gdb_next_attached_cpu(gdbserver_state.query_cpu); |
2704efad JD |
2075 | } |
2076 | ||
2077 | static void handle_query_first_threads(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2078 | { | |
a346af3e | 2079 | gdbserver_state.query_cpu = gdb_first_attached_cpu(); |
2704efad JD |
2080 | handle_query_threads(gdb_ctx, user_ctx); |
2081 | } | |
2082 | ||
2083 | static void handle_query_thread_extra(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2084 | { | |
308f9e88 | 2085 | g_autoptr(GString) rs = g_string_new(NULL); |
2704efad | 2086 | CPUState *cpu; |
2704efad JD |
2087 | |
2088 | if (!gdb_ctx->num_params || | |
2089 | gdb_ctx->params[0].thread_id.kind == GDB_READ_THREAD_ERR) { | |
a346af3e | 2090 | put_packet("E22"); |
2704efad JD |
2091 | return; |
2092 | } | |
2093 | ||
a346af3e | 2094 | cpu = gdb_get_cpu(gdb_ctx->params[0].thread_id.pid, |
2704efad JD |
2095 | gdb_ctx->params[0].thread_id.tid); |
2096 | if (!cpu) { | |
2097 | return; | |
2098 | } | |
2099 | ||
2100 | cpu_synchronize_state(cpu); | |
2101 | ||
a346af3e | 2102 | if (gdbserver_state.multiprocess && (gdbserver_state.process_num > 1)) { |
2704efad JD |
2103 | /* Print the CPU model and name in multiprocess mode */ |
2104 | ObjectClass *oc = object_get_class(OBJECT(cpu)); | |
2105 | const char *cpu_model = object_class_get_name(oc); | |
7a309cc9 | 2106 | const char *cpu_name = |
076b2fad | 2107 | object_get_canonical_path_component(OBJECT(cpu)); |
308f9e88 AB |
2108 | g_string_printf(rs, "%s %s [%s]", cpu_model, cpu_name, |
2109 | cpu->halted ? "halted " : "running"); | |
2704efad | 2110 | } else { |
308f9e88 | 2111 | g_string_printf(rs, "CPU#%d [%s]", cpu->cpu_index, |
2704efad JD |
2112 | cpu->halted ? "halted " : "running"); |
2113 | } | |
308f9e88 AB |
2114 | trace_gdbstub_op_extra_info(rs->str); |
2115 | memtohex(gdbserver_state.str_buf, (uint8_t *)rs->str, rs->len); | |
2116 | put_strbuf(); | |
2704efad JD |
2117 | } |
2118 | ||
2119 | #ifdef CONFIG_USER_ONLY | |
2120 | static void handle_query_offsets(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2121 | { | |
2122 | TaskState *ts; | |
2123 | ||
a346af3e | 2124 | ts = gdbserver_state.c_cpu->opaque; |
308f9e88 AB |
2125 | g_string_printf(gdbserver_state.str_buf, |
2126 | "Text=" TARGET_ABI_FMT_lx | |
2127 | ";Data=" TARGET_ABI_FMT_lx | |
2128 | ";Bss=" TARGET_ABI_FMT_lx, | |
2129 | ts->info->code_offset, | |
2130 | ts->info->data_offset, | |
2131 | ts->info->data_offset); | |
2132 | put_strbuf(); | |
2704efad JD |
2133 | } |
2134 | #else | |
2135 | static void handle_query_rcmd(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2136 | { | |
4a25f1b9 | 2137 | const guint8 zero = 0; |
2704efad JD |
2138 | int len; |
2139 | ||
2140 | if (!gdb_ctx->num_params) { | |
a346af3e | 2141 | put_packet("E22"); |
2704efad JD |
2142 | return; |
2143 | } | |
2144 | ||
2145 | len = strlen(gdb_ctx->params[0].data); | |
2146 | if (len % 2) { | |
a346af3e | 2147 | put_packet("E01"); |
2704efad JD |
2148 | return; |
2149 | } | |
2150 | ||
4a25f1b9 | 2151 | g_assert(gdbserver_state.mem_buf->len == 0); |
2704efad | 2152 | len = len / 2; |
4a25f1b9 AB |
2153 | hextomem(gdbserver_state.mem_buf, gdb_ctx->params[0].data, len); |
2154 | g_byte_array_append(gdbserver_state.mem_buf, &zero, 1); | |
2155 | qemu_chr_be_write(gdbserver_state.mon_chr, gdbserver_state.mem_buf->data, | |
2156 | gdbserver_state.mem_buf->len); | |
a346af3e | 2157 | put_packet("OK"); |
2704efad JD |
2158 | } |
2159 | #endif | |
2160 | ||
2161 | static void handle_query_supported(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2162 | { | |
2163 | CPUClass *cc; | |
2164 | ||
308f9e88 | 2165 | g_string_printf(gdbserver_state.str_buf, "PacketSize=%x", MAX_PACKET_LENGTH); |
2704efad JD |
2166 | cc = CPU_GET_CLASS(first_cpu); |
2167 | if (cc->gdb_core_xml_file) { | |
308f9e88 | 2168 | g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+"); |
2704efad JD |
2169 | } |
2170 | ||
fda8458b | 2171 | if (replay_mode == REPLAY_MODE_PLAY) { |
cda38259 PD |
2172 | g_string_append(gdbserver_state.str_buf, |
2173 | ";ReverseStep+;ReverseContinue+"); | |
fda8458b PD |
2174 | } |
2175 | ||
51c623b0 LY |
2176 | #ifdef CONFIG_USER_ONLY |
2177 | if (gdbserver_state.c_cpu->opaque) { | |
2178 | g_string_append(gdbserver_state.str_buf, ";qXfer:auxv:read+"); | |
2179 | } | |
2180 | #endif | |
2181 | ||
2704efad JD |
2182 | if (gdb_ctx->num_params && |
2183 | strstr(gdb_ctx->params[0].data, "multiprocess+")) { | |
a346af3e | 2184 | gdbserver_state.multiprocess = true; |
2704efad JD |
2185 | } |
2186 | ||
3bc2609d | 2187 | g_string_append(gdbserver_state.str_buf, ";vContSupported+;multiprocess+"); |
308f9e88 | 2188 | put_strbuf(); |
2704efad JD |
2189 | } |
2190 | ||
2191 | static void handle_query_xfer_features(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2192 | { | |
c145eeae | 2193 | GDBProcess *process; |
5b24c641 | 2194 | CPUClass *cc; |
2704efad JD |
2195 | unsigned long len, total_len, addr; |
2196 | const char *xml; | |
b4608c04 | 2197 | const char *p; |
2704efad JD |
2198 | |
2199 | if (gdb_ctx->num_params < 3) { | |
a346af3e | 2200 | put_packet("E22"); |
2704efad JD |
2201 | return; |
2202 | } | |
2203 | ||
a346af3e AB |
2204 | process = gdb_get_cpu_process(gdbserver_state.g_cpu); |
2205 | cc = CPU_GET_CLASS(gdbserver_state.g_cpu); | |
2704efad | 2206 | if (!cc->gdb_core_xml_file) { |
a346af3e | 2207 | put_packet(""); |
2704efad JD |
2208 | return; |
2209 | } | |
2210 | ||
2211 | gdb_has_xml = true; | |
2212 | p = gdb_ctx->params[0].data; | |
a346af3e | 2213 | xml = get_feature_xml(p, &p, process); |
2704efad | 2214 | if (!xml) { |
a346af3e | 2215 | put_packet("E00"); |
2704efad JD |
2216 | return; |
2217 | } | |
2218 | ||
2219 | addr = gdb_ctx->params[1].val_ul; | |
2220 | len = gdb_ctx->params[2].val_ul; | |
2221 | total_len = strlen(xml); | |
2222 | if (addr > total_len) { | |
a346af3e | 2223 | put_packet("E00"); |
2704efad JD |
2224 | return; |
2225 | } | |
2226 | ||
2227 | if (len > (MAX_PACKET_LENGTH - 5) / 2) { | |
2228 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
2229 | } | |
2230 | ||
2231 | if (len < total_len - addr) { | |
308f9e88 AB |
2232 | g_string_assign(gdbserver_state.str_buf, "m"); |
2233 | memtox(gdbserver_state.str_buf, xml + addr, len); | |
2704efad | 2234 | } else { |
308f9e88 AB |
2235 | g_string_assign(gdbserver_state.str_buf, "l"); |
2236 | memtox(gdbserver_state.str_buf, xml + addr, total_len - addr); | |
2704efad JD |
2237 | } |
2238 | ||
308f9e88 AB |
2239 | put_packet_binary(gdbserver_state.str_buf->str, |
2240 | gdbserver_state.str_buf->len, true); | |
2704efad JD |
2241 | } |
2242 | ||
51c623b0 LY |
2243 | #if defined(CONFIG_USER_ONLY) && defined(CONFIG_LINUX_USER) |
2244 | static void handle_query_xfer_auxv(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2245 | { | |
2246 | TaskState *ts; | |
2247 | unsigned long offset, len, saved_auxv, auxv_len; | |
51c623b0 LY |
2248 | |
2249 | if (gdb_ctx->num_params < 2) { | |
2250 | put_packet("E22"); | |
2251 | return; | |
2252 | } | |
2253 | ||
2254 | offset = gdb_ctx->params[0].val_ul; | |
2255 | len = gdb_ctx->params[1].val_ul; | |
2256 | ts = gdbserver_state.c_cpu->opaque; | |
2257 | saved_auxv = ts->info->saved_auxv; | |
2258 | auxv_len = ts->info->auxv_len; | |
6e3dd757 RH |
2259 | |
2260 | if (offset >= auxv_len) { | |
51c623b0 LY |
2261 | put_packet("E00"); |
2262 | return; | |
2263 | } | |
2264 | ||
2265 | if (len > (MAX_PACKET_LENGTH - 5) / 2) { | |
2266 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
2267 | } | |
2268 | ||
2269 | if (len < auxv_len - offset) { | |
2270 | g_string_assign(gdbserver_state.str_buf, "m"); | |
51c623b0 LY |
2271 | } else { |
2272 | g_string_assign(gdbserver_state.str_buf, "l"); | |
6e3dd757 RH |
2273 | len = auxv_len - offset; |
2274 | } | |
2275 | ||
2276 | g_byte_array_set_size(gdbserver_state.mem_buf, len); | |
2277 | if (target_memory_rw_debug(gdbserver_state.g_cpu, saved_auxv + offset, | |
2278 | gdbserver_state.mem_buf->data, len, false)) { | |
2279 | put_packet("E14"); | |
2280 | return; | |
51c623b0 LY |
2281 | } |
2282 | ||
6e3dd757 RH |
2283 | memtox(gdbserver_state.str_buf, |
2284 | (const char *)gdbserver_state.mem_buf->data, len); | |
51c623b0 LY |
2285 | put_packet_binary(gdbserver_state.str_buf->str, |
2286 | gdbserver_state.str_buf->len, true); | |
2287 | } | |
2288 | #endif | |
2289 | ||
2704efad JD |
2290 | static void handle_query_attached(GdbCmdContext *gdb_ctx, void *user_ctx) |
2291 | { | |
a346af3e | 2292 | put_packet(GDB_ATTACHED); |
2704efad JD |
2293 | } |
2294 | ||
2295 | static void handle_query_qemu_supported(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2296 | { | |
308f9e88 | 2297 | g_string_printf(gdbserver_state.str_buf, "sstepbits;sstep"); |
ab4752ec | 2298 | #ifndef CONFIG_USER_ONLY |
308f9e88 | 2299 | g_string_append(gdbserver_state.str_buf, ";PhyMemMode"); |
ab4752ec | 2300 | #endif |
308f9e88 | 2301 | put_strbuf(); |
ab4752ec JD |
2302 | } |
2303 | ||
2304 | #ifndef CONFIG_USER_ONLY | |
2305 | static void handle_query_qemu_phy_mem_mode(GdbCmdContext *gdb_ctx, | |
2306 | void *user_ctx) | |
2307 | { | |
308f9e88 AB |
2308 | g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode); |
2309 | put_strbuf(); | |
ab4752ec JD |
2310 | } |
2311 | ||
2312 | static void handle_set_qemu_phy_mem_mode(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2313 | { | |
2314 | if (!gdb_ctx->num_params) { | |
a346af3e | 2315 | put_packet("E22"); |
ab4752ec JD |
2316 | return; |
2317 | } | |
2318 | ||
2319 | if (!gdb_ctx->params[0].val_ul) { | |
2320 | phy_memory_mode = 0; | |
2321 | } else { | |
2322 | phy_memory_mode = 1; | |
2323 | } | |
a346af3e | 2324 | put_packet("OK"); |
2704efad | 2325 | } |
ab4752ec | 2326 | #endif |
2704efad JD |
2327 | |
2328 | static GdbCmdParseEntry gdb_gen_query_set_common_table[] = { | |
2329 | /* Order is important if has same prefix */ | |
2330 | { | |
2331 | .handler = handle_query_qemu_sstepbits, | |
2332 | .cmd = "qemu.sstepbits", | |
2333 | }, | |
2334 | { | |
2335 | .handler = handle_query_qemu_sstep, | |
2336 | .cmd = "qemu.sstep", | |
2337 | }, | |
2338 | { | |
2339 | .handler = handle_set_qemu_sstep, | |
2340 | .cmd = "qemu.sstep=", | |
2341 | .cmd_startswith = 1, | |
2342 | .schema = "l0" | |
2343 | }, | |
2344 | }; | |
2345 | ||
2346 | static GdbCmdParseEntry gdb_gen_query_table[] = { | |
2347 | { | |
2348 | .handler = handle_query_curr_tid, | |
2349 | .cmd = "C", | |
2350 | }, | |
2351 | { | |
2352 | .handler = handle_query_threads, | |
2353 | .cmd = "sThreadInfo", | |
2354 | }, | |
2355 | { | |
2356 | .handler = handle_query_first_threads, | |
2357 | .cmd = "fThreadInfo", | |
2358 | }, | |
2359 | { | |
2360 | .handler = handle_query_thread_extra, | |
2361 | .cmd = "ThreadExtraInfo,", | |
2362 | .cmd_startswith = 1, | |
2363 | .schema = "t0" | |
2364 | }, | |
2365 | #ifdef CONFIG_USER_ONLY | |
2366 | { | |
2367 | .handler = handle_query_offsets, | |
2368 | .cmd = "Offsets", | |
2369 | }, | |
2370 | #else | |
2371 | { | |
2372 | .handler = handle_query_rcmd, | |
2373 | .cmd = "Rcmd,", | |
2374 | .cmd_startswith = 1, | |
2375 | .schema = "s0" | |
2376 | }, | |
2377 | #endif | |
2378 | { | |
2379 | .handler = handle_query_supported, | |
2380 | .cmd = "Supported:", | |
2381 | .cmd_startswith = 1, | |
2382 | .schema = "s0" | |
2383 | }, | |
2384 | { | |
2385 | .handler = handle_query_supported, | |
2386 | .cmd = "Supported", | |
2387 | .schema = "s0" | |
2388 | }, | |
2389 | { | |
2390 | .handler = handle_query_xfer_features, | |
2391 | .cmd = "Xfer:features:read:", | |
2392 | .cmd_startswith = 1, | |
2393 | .schema = "s:l,l0" | |
2394 | }, | |
51c623b0 LY |
2395 | #if defined(CONFIG_USER_ONLY) && defined(CONFIG_LINUX_USER) |
2396 | { | |
2397 | .handler = handle_query_xfer_auxv, | |
2398 | .cmd = "Xfer:auxv:read::", | |
2399 | .cmd_startswith = 1, | |
2400 | .schema = "l,l0" | |
2401 | }, | |
2402 | #endif | |
2704efad JD |
2403 | { |
2404 | .handler = handle_query_attached, | |
2405 | .cmd = "Attached:", | |
2406 | .cmd_startswith = 1 | |
2407 | }, | |
2408 | { | |
2409 | .handler = handle_query_attached, | |
2410 | .cmd = "Attached", | |
2411 | }, | |
2412 | { | |
2413 | .handler = handle_query_qemu_supported, | |
2414 | .cmd = "qemu.Supported", | |
2415 | }, | |
ab4752ec JD |
2416 | #ifndef CONFIG_USER_ONLY |
2417 | { | |
2418 | .handler = handle_query_qemu_phy_mem_mode, | |
2419 | .cmd = "qemu.PhyMemMode", | |
2420 | }, | |
2421 | #endif | |
2704efad JD |
2422 | }; |
2423 | ||
2424 | static GdbCmdParseEntry gdb_gen_set_table[] = { | |
2425 | /* Order is important if has same prefix */ | |
2426 | { | |
2427 | .handler = handle_set_qemu_sstep, | |
2428 | .cmd = "qemu.sstep:", | |
2429 | .cmd_startswith = 1, | |
2430 | .schema = "l0" | |
2431 | }, | |
ab4752ec JD |
2432 | #ifndef CONFIG_USER_ONLY |
2433 | { | |
2434 | .handler = handle_set_qemu_phy_mem_mode, | |
2435 | .cmd = "qemu.PhyMemMode:", | |
2436 | .cmd_startswith = 1, | |
2437 | .schema = "l0" | |
2438 | }, | |
2439 | #endif | |
2704efad JD |
2440 | }; |
2441 | ||
2442 | static void handle_gen_query(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2443 | { | |
2444 | if (!gdb_ctx->num_params) { | |
2445 | return; | |
2446 | } | |
2447 | ||
a346af3e | 2448 | if (!process_string_cmd(NULL, gdb_ctx->params[0].data, |
2704efad JD |
2449 | gdb_gen_query_set_common_table, |
2450 | ARRAY_SIZE(gdb_gen_query_set_common_table))) { | |
2451 | return; | |
2452 | } | |
2453 | ||
a346af3e | 2454 | if (process_string_cmd(NULL, gdb_ctx->params[0].data, |
2704efad JD |
2455 | gdb_gen_query_table, |
2456 | ARRAY_SIZE(gdb_gen_query_table))) { | |
a346af3e | 2457 | put_packet(""); |
2704efad JD |
2458 | } |
2459 | } | |
2460 | ||
2461 | static void handle_gen_set(GdbCmdContext *gdb_ctx, void *user_ctx) | |
2462 | { | |
2463 | if (!gdb_ctx->num_params) { | |
2464 | return; | |
2465 | } | |
2466 | ||
a346af3e | 2467 | if (!process_string_cmd(NULL, gdb_ctx->params[0].data, |
2704efad JD |
2468 | gdb_gen_query_set_common_table, |
2469 | ARRAY_SIZE(gdb_gen_query_set_common_table))) { | |
2470 | return; | |
2471 | } | |
2472 | ||
a346af3e | 2473 | if (process_string_cmd(NULL, gdb_ctx->params[0].data, |
2704efad JD |
2474 | gdb_gen_set_table, |
2475 | ARRAY_SIZE(gdb_gen_set_table))) { | |
a346af3e | 2476 | put_packet(""); |
2704efad JD |
2477 | } |
2478 | } | |
2479 | ||
7009d579 JD |
2480 | static void handle_target_halt(GdbCmdContext *gdb_ctx, void *user_ctx) |
2481 | { | |
308f9e88 AB |
2482 | g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP); |
2483 | gdb_append_thread_id(gdbserver_state.c_cpu, gdbserver_state.str_buf); | |
2484 | g_string_append_c(gdbserver_state.str_buf, ';'); | |
2485 | put_strbuf(); | |
7009d579 JD |
2486 | /* |
2487 | * Remove all the breakpoints when this query is issued, | |
2488 | * because gdb is doing an initial connect and the state | |
2489 | * should be cleaned up. | |
2490 | */ | |
2491 | gdb_breakpoint_remove_all(); | |
2492 | } | |
2493 | ||
a346af3e | 2494 | static int gdb_handle_packet(const char *line_buf) |
2704efad | 2495 | { |
3e2c1261 | 2496 | const GdbCmdParseEntry *cmd_parser = NULL; |
3b46e624 | 2497 | |
5c9522b3 | 2498 | trace_gdbstub_io_command(line_buf); |
118e2268 | 2499 | |
3f1cbac7 | 2500 | switch (line_buf[0]) { |
53fd6554 | 2501 | case '!': |
a346af3e | 2502 | put_packet("OK"); |
53fd6554 | 2503 | break; |
858693c6 | 2504 | case '?': |
7009d579 JD |
2505 | { |
2506 | static const GdbCmdParseEntry target_halted_cmd_desc = { | |
2507 | .handler = handle_target_halt, | |
2508 | .cmd = "?", | |
2509 | .cmd_startswith = 1 | |
2510 | }; | |
2511 | cmd_parser = &target_halted_cmd_desc; | |
2512 | } | |
858693c6 FB |
2513 | break; |
2514 | case 'c': | |
4d6e3fe2 JD |
2515 | { |
2516 | static const GdbCmdParseEntry continue_cmd_desc = { | |
2517 | .handler = handle_continue, | |
2518 | .cmd = "c", | |
2519 | .cmd_startswith = 1, | |
2520 | .schema = "L0" | |
2521 | }; | |
2522 | cmd_parser = &continue_cmd_desc; | |
858693c6 | 2523 | } |
4d6e3fe2 | 2524 | break; |
1f487ee9 | 2525 | case 'C': |
ccc47d5d JD |
2526 | { |
2527 | static const GdbCmdParseEntry cont_with_sig_cmd_desc = { | |
2528 | .handler = handle_cont_with_sig, | |
2529 | .cmd = "C", | |
2530 | .cmd_startswith = 1, | |
2531 | .schema = "l0" | |
2532 | }; | |
2533 | cmd_parser = &cont_with_sig_cmd_desc; | |
2534 | } | |
2535 | break; | |
dd32aa10 | 2536 | case 'v': |
8536ec02 JD |
2537 | { |
2538 | static const GdbCmdParseEntry v_cmd_desc = { | |
2539 | .handler = handle_v_commands, | |
2540 | .cmd = "v", | |
2541 | .cmd_startswith = 1, | |
2542 | .schema = "s0" | |
2543 | }; | |
2544 | cmd_parser = &v_cmd_desc; | |
dd32aa10 | 2545 | } |
8536ec02 | 2546 | break; |
7d03f82f EI |
2547 | case 'k': |
2548 | /* Kill the target */ | |
7ae6c571 | 2549 | error_report("QEMU: Terminated via GDBstub"); |
b9e10c6c | 2550 | gdb_exit(0); |
7d03f82f EI |
2551 | exit(0); |
2552 | case 'D': | |
3e2c1261 JD |
2553 | { |
2554 | static const GdbCmdParseEntry detach_cmd_desc = { | |
2555 | .handler = handle_detach, | |
2556 | .cmd = "D", | |
2557 | .cmd_startswith = 1, | |
2558 | .schema = "?.l0" | |
2559 | }; | |
2560 | cmd_parser = &detach_cmd_desc; | |
546f3c67 | 2561 | } |
7d03f82f | 2562 | break; |
858693c6 | 2563 | case 's': |
933f80dd JD |
2564 | { |
2565 | static const GdbCmdParseEntry step_cmd_desc = { | |
2566 | .handler = handle_step, | |
2567 | .cmd = "s", | |
2568 | .cmd_startswith = 1, | |
2569 | .schema = "L0" | |
2570 | }; | |
2571 | cmd_parser = &step_cmd_desc; | |
858693c6 | 2572 | } |
933f80dd | 2573 | break; |
fda8458b PD |
2574 | case 'b': |
2575 | { | |
2576 | static const GdbCmdParseEntry backward_cmd_desc = { | |
2577 | .handler = handle_backward, | |
2578 | .cmd = "b", | |
2579 | .cmd_startswith = 1, | |
2580 | .schema = "o0" | |
2581 | }; | |
2582 | cmd_parser = &backward_cmd_desc; | |
2583 | } | |
2584 | break; | |
a2d1ebaf PB |
2585 | case 'F': |
2586 | { | |
4b20fab1 JD |
2587 | static const GdbCmdParseEntry file_io_cmd_desc = { |
2588 | .handler = handle_file_io, | |
2589 | .cmd = "F", | |
2590 | .cmd_startswith = 1, | |
2591 | .schema = "L,L,o0" | |
2592 | }; | |
2593 | cmd_parser = &file_io_cmd_desc; | |
a2d1ebaf PB |
2594 | } |
2595 | break; | |
858693c6 | 2596 | case 'g': |
397d1370 JD |
2597 | { |
2598 | static const GdbCmdParseEntry read_all_regs_cmd_desc = { | |
2599 | .handler = handle_read_all_regs, | |
2600 | .cmd = "g", | |
2601 | .cmd_startswith = 1 | |
2602 | }; | |
2603 | cmd_parser = &read_all_regs_cmd_desc; | |
56aebc89 | 2604 | } |
858693c6 FB |
2605 | break; |
2606 | case 'G': | |
287ca120 JD |
2607 | { |
2608 | static const GdbCmdParseEntry write_all_regs_cmd_desc = { | |
2609 | .handler = handle_write_all_regs, | |
2610 | .cmd = "G", | |
2611 | .cmd_startswith = 1, | |
2612 | .schema = "s0" | |
2613 | }; | |
2614 | cmd_parser = &write_all_regs_cmd_desc; | |
56aebc89 | 2615 | } |
858693c6 FB |
2616 | break; |
2617 | case 'm': | |
da92e236 JD |
2618 | { |
2619 | static const GdbCmdParseEntry read_mem_cmd_desc = { | |
2620 | .handler = handle_read_mem, | |
2621 | .cmd = "m", | |
2622 | .cmd_startswith = 1, | |
2623 | .schema = "L,L0" | |
2624 | }; | |
2625 | cmd_parser = &read_mem_cmd_desc; | |
6f970bd9 | 2626 | } |
858693c6 FB |
2627 | break; |
2628 | case 'M': | |
cc0ecc78 JD |
2629 | { |
2630 | static const GdbCmdParseEntry write_mem_cmd_desc = { | |
2631 | .handler = handle_write_mem, | |
2632 | .cmd = "M", | |
2633 | .cmd_startswith = 1, | |
2634 | .schema = "L,L:s0" | |
2635 | }; | |
2636 | cmd_parser = &write_mem_cmd_desc; | |
44520db1 | 2637 | } |
858693c6 | 2638 | break; |
56aebc89 | 2639 | case 'p': |
5d0e57bd JD |
2640 | { |
2641 | static const GdbCmdParseEntry get_reg_cmd_desc = { | |
2642 | .handler = handle_get_reg, | |
2643 | .cmd = "p", | |
2644 | .cmd_startswith = 1, | |
2645 | .schema = "L0" | |
2646 | }; | |
2647 | cmd_parser = &get_reg_cmd_desc; | |
56aebc89 PB |
2648 | } |
2649 | break; | |
2650 | case 'P': | |
62b3320b JD |
2651 | { |
2652 | static const GdbCmdParseEntry set_reg_cmd_desc = { | |
2653 | .handler = handle_set_reg, | |
2654 | .cmd = "P", | |
2655 | .cmd_startswith = 1, | |
2656 | .schema = "L?s0" | |
2657 | }; | |
2658 | cmd_parser = &set_reg_cmd_desc; | |
2659 | } | |
56aebc89 | 2660 | break; |
858693c6 | 2661 | case 'Z': |
77f6ce50 JD |
2662 | { |
2663 | static const GdbCmdParseEntry insert_bp_cmd_desc = { | |
2664 | .handler = handle_insert_bp, | |
2665 | .cmd = "Z", | |
2666 | .cmd_startswith = 1, | |
2667 | .schema = "l?L?L0" | |
2668 | }; | |
2669 | cmd_parser = &insert_bp_cmd_desc; | |
2670 | } | |
2671 | break; | |
858693c6 | 2672 | case 'z': |
77f6ce50 JD |
2673 | { |
2674 | static const GdbCmdParseEntry remove_bp_cmd_desc = { | |
2675 | .handler = handle_remove_bp, | |
2676 | .cmd = "z", | |
2677 | .cmd_startswith = 1, | |
2678 | .schema = "l?L?L0" | |
2679 | }; | |
2680 | cmd_parser = &remove_bp_cmd_desc; | |
2681 | } | |
858693c6 | 2682 | break; |
880a7578 | 2683 | case 'H': |
3a9651d6 JD |
2684 | { |
2685 | static const GdbCmdParseEntry set_thread_cmd_desc = { | |
2686 | .handler = handle_set_thread, | |
2687 | .cmd = "H", | |
2688 | .cmd_startswith = 1, | |
2689 | .schema = "o.t0" | |
2690 | }; | |
2691 | cmd_parser = &set_thread_cmd_desc; | |
880a7578 AL |
2692 | } |
2693 | break; | |
2694 | case 'T': | |
44ffded0 JD |
2695 | { |
2696 | static const GdbCmdParseEntry thread_alive_cmd_desc = { | |
2697 | .handler = handle_thread_alive, | |
2698 | .cmd = "T", | |
2699 | .cmd_startswith = 1, | |
2700 | .schema = "t0" | |
2701 | }; | |
2702 | cmd_parser = &thread_alive_cmd_desc; | |
1e9fa730 | 2703 | } |
880a7578 | 2704 | break; |
978efd6a | 2705 | case 'q': |
2704efad JD |
2706 | { |
2707 | static const GdbCmdParseEntry gen_query_cmd_desc = { | |
2708 | .handler = handle_gen_query, | |
2709 | .cmd = "q", | |
2710 | .cmd_startswith = 1, | |
2711 | .schema = "s0" | |
2712 | }; | |
2713 | cmd_parser = &gen_query_cmd_desc; | |
56aebc89 | 2714 | } |
2704efad JD |
2715 | break; |
2716 | case 'Q': | |
2717 | { | |
2718 | static const GdbCmdParseEntry gen_set_cmd_desc = { | |
2719 | .handler = handle_gen_set, | |
2720 | .cmd = "Q", | |
2721 | .cmd_startswith = 1, | |
2722 | .schema = "s0" | |
2723 | }; | |
2724 | cmd_parser = &gen_set_cmd_desc; | |
a3919386 | 2725 | } |
2704efad | 2726 | break; |
858693c6 | 2727 | default: |
858693c6 | 2728 | /* put empty packet */ |
a346af3e | 2729 | put_packet(""); |
858693c6 FB |
2730 | break; |
2731 | } | |
3e2c1261 | 2732 | |
2bdec398 | 2733 | if (cmd_parser) { |
a346af3e | 2734 | run_cmd_parser(line_buf, cmd_parser); |
2bdec398 | 2735 | } |
3e2c1261 | 2736 | |
858693c6 FB |
2737 | return RS_IDLE; |
2738 | } | |
2739 | ||
64f6b346 | 2740 | void gdb_set_stop_cpu(CPUState *cpu) |
880a7578 | 2741 | { |
a346af3e | 2742 | GDBProcess *p = gdb_get_cpu_process(cpu); |
160d858d LM |
2743 | |
2744 | if (!p->attached) { | |
2745 | /* | |
2746 | * Having a stop CPU corresponding to a process that is not attached | |
2747 | * confuses GDB. So we ignore the request. | |
2748 | */ | |
2749 | return; | |
2750 | } | |
2751 | ||
8d98c445 AB |
2752 | gdbserver_state.c_cpu = cpu; |
2753 | gdbserver_state.g_cpu = cpu; | |
880a7578 AL |
2754 | } |
2755 | ||
1fddef4b | 2756 | #ifndef CONFIG_USER_ONLY |
538f0497 | 2757 | static void gdb_vm_state_change(void *opaque, bool running, RunState state) |
858693c6 | 2758 | { |
a346af3e | 2759 | CPUState *cpu = gdbserver_state.c_cpu; |
308f9e88 AB |
2760 | g_autoptr(GString) buf = g_string_new(NULL); |
2761 | g_autoptr(GString) tid = g_string_new(NULL); | |
d6fc1b39 | 2762 | const char *type; |
858693c6 FB |
2763 | int ret; |
2764 | ||
a346af3e | 2765 | if (running || gdbserver_state.state == RS_INACTIVE) { |
cdb432b2 MI |
2766 | return; |
2767 | } | |
2768 | /* Is there a GDB syscall waiting to be sent? */ | |
a346af3e AB |
2769 | if (gdbserver_state.current_syscall_cb) { |
2770 | put_packet(gdbserver_state.syscall_buf); | |
a2d1ebaf | 2771 | return; |
e07bbac5 | 2772 | } |
95567c27 LM |
2773 | |
2774 | if (cpu == NULL) { | |
2775 | /* No process attached */ | |
2776 | return; | |
2777 | } | |
2778 | ||
308f9e88 | 2779 | gdb_append_thread_id(cpu, tid); |
95567c27 | 2780 | |
1dfb4dd9 | 2781 | switch (state) { |
0461d5a6 | 2782 | case RUN_STATE_DEBUG: |
ff4700b0 AF |
2783 | if (cpu->watchpoint_hit) { |
2784 | switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) { | |
a1d1bb31 | 2785 | case BP_MEM_READ: |
d6fc1b39 AL |
2786 | type = "r"; |
2787 | break; | |
a1d1bb31 | 2788 | case BP_MEM_ACCESS: |
d6fc1b39 AL |
2789 | type = "a"; |
2790 | break; | |
2791 | default: | |
2792 | type = ""; | |
2793 | break; | |
2794 | } | |
5c9522b3 DG |
2795 | trace_gdbstub_hit_watchpoint(type, cpu_gdb_index(cpu), |
2796 | (target_ulong)cpu->watchpoint_hit->vaddr); | |
308f9e88 AB |
2797 | g_string_printf(buf, "T%02xthread:%s;%swatch:" TARGET_FMT_lx ";", |
2798 | GDB_SIGNAL_TRAP, tid->str, type, | |
2799 | (target_ulong)cpu->watchpoint_hit->vaddr); | |
ff4700b0 | 2800 | cpu->watchpoint_hit = NULL; |
425189a8 | 2801 | goto send_packet; |
5c9522b3 DG |
2802 | } else { |
2803 | trace_gdbstub_hit_break(); | |
6658ffb8 | 2804 | } |
bbd77c18 | 2805 | tb_flush(cpu); |
ca587a8e | 2806 | ret = GDB_SIGNAL_TRAP; |
425189a8 | 2807 | break; |
0461d5a6 | 2808 | case RUN_STATE_PAUSED: |
5c9522b3 | 2809 | trace_gdbstub_hit_paused(); |
9781e040 | 2810 | ret = GDB_SIGNAL_INT; |
425189a8 | 2811 | break; |
0461d5a6 | 2812 | case RUN_STATE_SHUTDOWN: |
5c9522b3 | 2813 | trace_gdbstub_hit_shutdown(); |
425189a8 JK |
2814 | ret = GDB_SIGNAL_QUIT; |
2815 | break; | |
0461d5a6 | 2816 | case RUN_STATE_IO_ERROR: |
5c9522b3 | 2817 | trace_gdbstub_hit_io_error(); |
425189a8 JK |
2818 | ret = GDB_SIGNAL_IO; |
2819 | break; | |
0461d5a6 | 2820 | case RUN_STATE_WATCHDOG: |
5c9522b3 | 2821 | trace_gdbstub_hit_watchdog(); |
425189a8 JK |
2822 | ret = GDB_SIGNAL_ALRM; |
2823 | break; | |
0461d5a6 | 2824 | case RUN_STATE_INTERNAL_ERROR: |
5c9522b3 | 2825 | trace_gdbstub_hit_internal_error(); |
425189a8 JK |
2826 | ret = GDB_SIGNAL_ABRT; |
2827 | break; | |
0461d5a6 LC |
2828 | case RUN_STATE_SAVE_VM: |
2829 | case RUN_STATE_RESTORE_VM: | |
425189a8 | 2830 | return; |
0461d5a6 | 2831 | case RUN_STATE_FINISH_MIGRATE: |
425189a8 JK |
2832 | ret = GDB_SIGNAL_XCPU; |
2833 | break; | |
2834 | default: | |
5c9522b3 | 2835 | trace_gdbstub_hit_unknown(state); |
425189a8 JK |
2836 | ret = GDB_SIGNAL_UNKNOWN; |
2837 | break; | |
bbeb7b5c | 2838 | } |
226d007d | 2839 | gdb_set_stop_cpu(cpu); |
308f9e88 | 2840 | g_string_printf(buf, "T%02xthread:%s;", ret, tid->str); |
425189a8 JK |
2841 | |
2842 | send_packet: | |
308f9e88 | 2843 | put_packet(buf->str); |
425189a8 JK |
2844 | |
2845 | /* disable single step if it was enabled */ | |
3825b28f | 2846 | cpu_single_step(cpu, 0); |
858693c6 | 2847 | } |
1fddef4b | 2848 | #endif |
858693c6 | 2849 | |
a2d1ebaf PB |
2850 | /* Send a gdb syscall request. |
2851 | This accepts limited printf-style format specifiers, specifically: | |
a87295e8 PB |
2852 | %x - target_ulong argument printed in hex. |
2853 | %lx - 64-bit argument printed in hex. | |
2854 | %s - string pointer (target_ulong) and length (int) pair. */ | |
19239b39 | 2855 | void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va) |
a2d1ebaf | 2856 | { |
a2d1ebaf | 2857 | char *p; |
cdb432b2 | 2858 | char *p_end; |
a2d1ebaf | 2859 | target_ulong addr; |
a87295e8 | 2860 | uint64_t i64; |
a2d1ebaf | 2861 | |
a346af3e | 2862 | if (!gdbserver_state.init) { |
a2d1ebaf | 2863 | return; |
a346af3e | 2864 | } |
8d98c445 AB |
2865 | |
2866 | gdbserver_state.current_syscall_cb = cb; | |
a2d1ebaf | 2867 | #ifndef CONFIG_USER_ONLY |
0461d5a6 | 2868 | vm_stop(RUN_STATE_DEBUG); |
a2d1ebaf | 2869 | #endif |
8d98c445 AB |
2870 | p = &gdbserver_state.syscall_buf[0]; |
2871 | p_end = &gdbserver_state.syscall_buf[sizeof(gdbserver_state.syscall_buf)]; | |
a2d1ebaf PB |
2872 | *(p++) = 'F'; |
2873 | while (*fmt) { | |
2874 | if (*fmt == '%') { | |
2875 | fmt++; | |
2876 | switch (*fmt++) { | |
2877 | case 'x': | |
2878 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 2879 | p += snprintf(p, p_end - p, TARGET_FMT_lx, addr); |
a2d1ebaf | 2880 | break; |
a87295e8 PB |
2881 | case 'l': |
2882 | if (*(fmt++) != 'x') | |
2883 | goto bad_format; | |
2884 | i64 = va_arg(va, uint64_t); | |
cdb432b2 | 2885 | p += snprintf(p, p_end - p, "%" PRIx64, i64); |
a87295e8 | 2886 | break; |
a2d1ebaf PB |
2887 | case 's': |
2888 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 2889 | p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x", |
363a37d5 | 2890 | addr, va_arg(va, int)); |
a2d1ebaf PB |
2891 | break; |
2892 | default: | |
a87295e8 | 2893 | bad_format: |
7ae6c571 ZY |
2894 | error_report("gdbstub: Bad syscall format string '%s'", |
2895 | fmt - 1); | |
a2d1ebaf PB |
2896 | break; |
2897 | } | |
2898 | } else { | |
2899 | *(p++) = *(fmt++); | |
2900 | } | |
2901 | } | |
8a93e02a | 2902 | *p = 0; |
a2d1ebaf | 2903 | #ifdef CONFIG_USER_ONLY |
a346af3e | 2904 | put_packet(gdbserver_state.syscall_buf); |
4f710866 PM |
2905 | /* Return control to gdb for it to process the syscall request. |
2906 | * Since the protocol requires that gdb hands control back to us | |
2907 | * using a "here are the results" F packet, we don't need to check | |
2908 | * gdb_handlesig's return value (which is the signal to deliver if | |
2909 | * execution was resumed via a continue packet). | |
2910 | */ | |
8d98c445 | 2911 | gdb_handlesig(gdbserver_state.c_cpu, 0); |
a2d1ebaf | 2912 | #else |
cdb432b2 MI |
2913 | /* In this case wait to send the syscall packet until notification that |
2914 | the CPU has stopped. This must be done because if the packet is sent | |
2915 | now the reply from the syscall request could be received while the CPU | |
2916 | is still in the running state, which can cause packets to be dropped | |
2917 | and state transition 'T' packets to be sent while the syscall is still | |
2918 | being processed. */ | |
8d98c445 | 2919 | qemu_cpu_kick(gdbserver_state.c_cpu); |
a2d1ebaf PB |
2920 | #endif |
2921 | } | |
2922 | ||
19239b39 PM |
2923 | void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
2924 | { | |
2925 | va_list va; | |
2926 | ||
2927 | va_start(va, fmt); | |
2928 | gdb_do_syscallv(cb, fmt, va); | |
2929 | va_end(va); | |
2930 | } | |
2931 | ||
a346af3e | 2932 | static void gdb_read_byte(uint8_t ch) |
858693c6 | 2933 | { |
60fe76f3 | 2934 | uint8_t reply; |
858693c6 | 2935 | |
1fddef4b | 2936 | #ifndef CONFIG_USER_ONLY |
d116e813 | 2937 | if (gdbserver_state.last_packet->len) { |
4046d913 PB |
2938 | /* Waiting for a response to the last packet. If we see the start |
2939 | of a new command then abandon the previous response. */ | |
2940 | if (ch == '-') { | |
5c9522b3 | 2941 | trace_gdbstub_err_got_nack(); |
d116e813 DH |
2942 | put_buffer(gdbserver_state.last_packet->data, |
2943 | gdbserver_state.last_packet->len); | |
118e2268 | 2944 | } else if (ch == '+') { |
5c9522b3 | 2945 | trace_gdbstub_io_got_ack(); |
118e2268 | 2946 | } else { |
33c846ef | 2947 | trace_gdbstub_io_got_unexpected(ch); |
4046d913 | 2948 | } |
118e2268 | 2949 | |
d116e813 DH |
2950 | if (ch == '+' || ch == '$') { |
2951 | g_byte_array_set_size(gdbserver_state.last_packet, 0); | |
2952 | } | |
4046d913 PB |
2953 | if (ch != '$') |
2954 | return; | |
2955 | } | |
1354869c | 2956 | if (runstate_is_running()) { |
858693c6 FB |
2957 | /* when the CPU is running, we cannot do anything except stop |
2958 | it when receiving a char */ | |
0461d5a6 | 2959 | vm_stop(RUN_STATE_PAUSED); |
5fafdf24 | 2960 | } else |
1fddef4b | 2961 | #endif |
41625033 | 2962 | { |
a346af3e | 2963 | switch(gdbserver_state.state) { |
858693c6 FB |
2964 | case RS_IDLE: |
2965 | if (ch == '$') { | |
4bf43122 | 2966 | /* start of command packet */ |
a346af3e AB |
2967 | gdbserver_state.line_buf_index = 0; |
2968 | gdbserver_state.line_sum = 0; | |
2969 | gdbserver_state.state = RS_GETLINE; | |
4bf43122 | 2970 | } else { |
33c846ef | 2971 | trace_gdbstub_err_garbage(ch); |
c33a346e | 2972 | } |
b4608c04 | 2973 | break; |
858693c6 | 2974 | case RS_GETLINE: |
4bf43122 DG |
2975 | if (ch == '}') { |
2976 | /* start escape sequence */ | |
a346af3e AB |
2977 | gdbserver_state.state = RS_GETLINE_ESC; |
2978 | gdbserver_state.line_sum += ch; | |
4bf43122 DG |
2979 | } else if (ch == '*') { |
2980 | /* start run length encoding sequence */ | |
a346af3e AB |
2981 | gdbserver_state.state = RS_GETLINE_RLE; |
2982 | gdbserver_state.line_sum += ch; | |
4bf43122 DG |
2983 | } else if (ch == '#') { |
2984 | /* end of command, start of checksum*/ | |
a346af3e AB |
2985 | gdbserver_state.state = RS_CHKSUM1; |
2986 | } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) { | |
5c9522b3 | 2987 | trace_gdbstub_err_overrun(); |
a346af3e | 2988 | gdbserver_state.state = RS_IDLE; |
4bf43122 DG |
2989 | } else { |
2990 | /* unescaped command character */ | |
a346af3e AB |
2991 | gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch; |
2992 | gdbserver_state.line_sum += ch; | |
4bf43122 DG |
2993 | } |
2994 | break; | |
2995 | case RS_GETLINE_ESC: | |
858693c6 | 2996 | if (ch == '#') { |
4bf43122 | 2997 | /* unexpected end of command in escape sequence */ |
a346af3e AB |
2998 | gdbserver_state.state = RS_CHKSUM1; |
2999 | } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) { | |
4bf43122 | 3000 | /* command buffer overrun */ |
5c9522b3 | 3001 | trace_gdbstub_err_overrun(); |
a346af3e | 3002 | gdbserver_state.state = RS_IDLE; |
4c3a88a2 | 3003 | } else { |
4bf43122 | 3004 | /* parse escaped character and leave escape state */ |
a346af3e AB |
3005 | gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch ^ 0x20; |
3006 | gdbserver_state.line_sum += ch; | |
3007 | gdbserver_state.state = RS_GETLINE; | |
4bf43122 DG |
3008 | } |
3009 | break; | |
3010 | case RS_GETLINE_RLE: | |
046aba16 MA |
3011 | /* |
3012 | * Run-length encoding is explained in "Debugging with GDB / | |
3013 | * Appendix E GDB Remote Serial Protocol / Overview". | |
3014 | */ | |
3015 | if (ch < ' ' || ch == '#' || ch == '$' || ch > 126) { | |
4bf43122 | 3016 | /* invalid RLE count encoding */ |
33c846ef | 3017 | trace_gdbstub_err_invalid_repeat(ch); |
a346af3e | 3018 | gdbserver_state.state = RS_GETLINE; |
4bf43122 DG |
3019 | } else { |
3020 | /* decode repeat length */ | |
33c846ef | 3021 | int repeat = ch - ' ' + 3; |
a346af3e | 3022 | if (gdbserver_state.line_buf_index + repeat >= sizeof(gdbserver_state.line_buf) - 1) { |
4bf43122 | 3023 | /* that many repeats would overrun the command buffer */ |
5c9522b3 | 3024 | trace_gdbstub_err_overrun(); |
a346af3e AB |
3025 | gdbserver_state.state = RS_IDLE; |
3026 | } else if (gdbserver_state.line_buf_index < 1) { | |
4bf43122 | 3027 | /* got a repeat but we have nothing to repeat */ |
5c9522b3 | 3028 | trace_gdbstub_err_invalid_rle(); |
a346af3e | 3029 | gdbserver_state.state = RS_GETLINE; |
4bf43122 DG |
3030 | } else { |
3031 | /* repeat the last character */ | |
a346af3e AB |
3032 | memset(gdbserver_state.line_buf + gdbserver_state.line_buf_index, |
3033 | gdbserver_state.line_buf[gdbserver_state.line_buf_index - 1], repeat); | |
3034 | gdbserver_state.line_buf_index += repeat; | |
3035 | gdbserver_state.line_sum += ch; | |
3036 | gdbserver_state.state = RS_GETLINE; | |
4bf43122 | 3037 | } |
4c3a88a2 FB |
3038 | } |
3039 | break; | |
858693c6 | 3040 | case RS_CHKSUM1: |
4bf43122 DG |
3041 | /* get high hex digit of checksum */ |
3042 | if (!isxdigit(ch)) { | |
33c846ef | 3043 | trace_gdbstub_err_checksum_invalid(ch); |
a346af3e | 3044 | gdbserver_state.state = RS_GETLINE; |
4bf43122 DG |
3045 | break; |
3046 | } | |
a346af3e AB |
3047 | gdbserver_state.line_buf[gdbserver_state.line_buf_index] = '\0'; |
3048 | gdbserver_state.line_csum = fromhex(ch) << 4; | |
3049 | gdbserver_state.state = RS_CHKSUM2; | |
858693c6 FB |
3050 | break; |
3051 | case RS_CHKSUM2: | |
4bf43122 DG |
3052 | /* get low hex digit of checksum */ |
3053 | if (!isxdigit(ch)) { | |
33c846ef | 3054 | trace_gdbstub_err_checksum_invalid(ch); |
a346af3e | 3055 | gdbserver_state.state = RS_GETLINE; |
4bf43122 | 3056 | break; |
858693c6 | 3057 | } |
a346af3e | 3058 | gdbserver_state.line_csum |= fromhex(ch); |
4bf43122 | 3059 | |
a346af3e AB |
3060 | if (gdbserver_state.line_csum != (gdbserver_state.line_sum & 0xff)) { |
3061 | trace_gdbstub_err_checksum_incorrect(gdbserver_state.line_sum, gdbserver_state.line_csum); | |
4bf43122 | 3062 | /* send NAK reply */ |
60fe76f3 | 3063 | reply = '-'; |
a346af3e AB |
3064 | put_buffer(&reply, 1); |
3065 | gdbserver_state.state = RS_IDLE; | |
4c3a88a2 | 3066 | } else { |
4bf43122 | 3067 | /* send ACK reply */ |
60fe76f3 | 3068 | reply = '+'; |
a346af3e AB |
3069 | put_buffer(&reply, 1); |
3070 | gdbserver_state.state = gdb_handle_packet(gdbserver_state.line_buf); | |
4c3a88a2 FB |
3071 | } |
3072 | break; | |
a2d1ebaf PB |
3073 | default: |
3074 | abort(); | |
858693c6 FB |
3075 | } |
3076 | } | |
3077 | } | |
3078 | ||
0e1c9c54 | 3079 | /* Tell the remote gdb that the process has exited. */ |
ad9dcb20 | 3080 | void gdb_exit(int code) |
0e1c9c54 | 3081 | { |
0e1c9c54 PB |
3082 | char buf[4]; |
3083 | ||
8d98c445 | 3084 | if (!gdbserver_state.init) { |
0e1c9c54 PB |
3085 | return; |
3086 | } | |
3087 | #ifdef CONFIG_USER_ONLY | |
fcedd920 AB |
3088 | if (gdbserver_state.socket_path) { |
3089 | unlink(gdbserver_state.socket_path); | |
3090 | } | |
e0a1e208 | 3091 | if (gdbserver_state.fd < 0) { |
0e1c9c54 PB |
3092 | return; |
3093 | } | |
3094 | #endif | |
3095 | ||
5c9522b3 DG |
3096 | trace_gdbstub_op_exiting((uint8_t)code); |
3097 | ||
0e1c9c54 | 3098 | snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code); |
a346af3e | 3099 | put_packet(buf); |
e2af15b2 FC |
3100 | |
3101 | #ifndef CONFIG_USER_ONLY | |
8d98c445 | 3102 | qemu_chr_fe_deinit(&gdbserver_state.chr, true); |
e2af15b2 | 3103 | #endif |
0e1c9c54 PB |
3104 | } |
3105 | ||
8f468636 LM |
3106 | /* |
3107 | * Create the process that will contain all the "orphan" CPUs (that are not | |
3108 | * part of a CPU cluster). Note that if this process contains no CPUs, it won't | |
3109 | * be attachable and thus will be invisible to the user. | |
3110 | */ | |
3111 | static void create_default_process(GDBState *s) | |
3112 | { | |
3113 | GDBProcess *process; | |
3114 | int max_pid = 0; | |
3115 | ||
a346af3e | 3116 | if (gdbserver_state.process_num) { |
8f468636 LM |
3117 | max_pid = s->processes[s->process_num - 1].pid; |
3118 | } | |
3119 | ||
3120 | s->processes = g_renew(GDBProcess, s->processes, ++s->process_num); | |
3121 | process = &s->processes[s->process_num - 1]; | |
3122 | ||
3123 | /* We need an available PID slot for this process */ | |
3124 | assert(max_pid < UINT32_MAX); | |
3125 | ||
3126 | process->pid = max_pid + 1; | |
3127 | process->attached = false; | |
c145eeae | 3128 | process->target_xml[0] = '\0'; |
8f468636 LM |
3129 | } |
3130 | ||
1fddef4b FB |
3131 | #ifdef CONFIG_USER_ONLY |
3132 | int | |
db6b81d4 | 3133 | gdb_handlesig(CPUState *cpu, int sig) |
1fddef4b | 3134 | { |
5ca666c7 AF |
3135 | char buf[256]; |
3136 | int n; | |
1fddef4b | 3137 | |
e0a1e208 | 3138 | if (!gdbserver_state.init || gdbserver_state.fd < 0) { |
5ca666c7 AF |
3139 | return sig; |
3140 | } | |
1fddef4b | 3141 | |
5ca666c7 | 3142 | /* disable single step if it was enabled */ |
3825b28f | 3143 | cpu_single_step(cpu, 0); |
bbd77c18 | 3144 | tb_flush(cpu); |
1fddef4b | 3145 | |
5ca666c7 AF |
3146 | if (sig != 0) { |
3147 | snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); | |
a346af3e | 3148 | put_packet(buf); |
5ca666c7 AF |
3149 | } |
3150 | /* put_packet() might have detected that the peer terminated the | |
3151 | connection. */ | |
8d98c445 | 3152 | if (gdbserver_state.fd < 0) { |
5ca666c7 AF |
3153 | return sig; |
3154 | } | |
1fddef4b | 3155 | |
5ca666c7 | 3156 | sig = 0; |
8d98c445 AB |
3157 | gdbserver_state.state = RS_IDLE; |
3158 | gdbserver_state.running_state = 0; | |
3159 | while (gdbserver_state.running_state == 0) { | |
3160 | n = read(gdbserver_state.fd, buf, 256); | |
5ca666c7 AF |
3161 | if (n > 0) { |
3162 | int i; | |
3163 | ||
3164 | for (i = 0; i < n; i++) { | |
a346af3e | 3165 | gdb_read_byte(buf[i]); |
5ca666c7 | 3166 | } |
5819e3e0 | 3167 | } else { |
5ca666c7 AF |
3168 | /* XXX: Connection closed. Should probably wait for another |
3169 | connection before continuing. */ | |
5819e3e0 | 3170 | if (n == 0) { |
8d98c445 | 3171 | close(gdbserver_state.fd); |
5819e3e0 | 3172 | } |
8d98c445 | 3173 | gdbserver_state.fd = -1; |
5ca666c7 | 3174 | return sig; |
1fddef4b | 3175 | } |
5ca666c7 | 3176 | } |
8d98c445 AB |
3177 | sig = gdbserver_state.signal; |
3178 | gdbserver_state.signal = 0; | |
5ca666c7 | 3179 | return sig; |
1fddef4b | 3180 | } |
e9009676 | 3181 | |
ca587a8e | 3182 | /* Tell the remote gdb that the process has exited due to SIG. */ |
9349b4f9 | 3183 | void gdb_signalled(CPUArchState *env, int sig) |
ca587a8e | 3184 | { |
5ca666c7 | 3185 | char buf[4]; |
ca587a8e | 3186 | |
e0a1e208 | 3187 | if (!gdbserver_state.init || gdbserver_state.fd < 0) { |
5ca666c7 AF |
3188 | return; |
3189 | } | |
ca587a8e | 3190 | |
5ca666c7 | 3191 | snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig)); |
a346af3e | 3192 | put_packet(buf); |
ca587a8e | 3193 | } |
1fddef4b | 3194 | |
fcedd920 AB |
3195 | static void gdb_accept_init(int fd) |
3196 | { | |
3197 | init_gdbserver_state(); | |
3198 | create_default_process(&gdbserver_state); | |
3199 | gdbserver_state.processes[0].attached = true; | |
3200 | gdbserver_state.c_cpu = gdb_first_attached_cpu(); | |
3201 | gdbserver_state.g_cpu = gdbserver_state.c_cpu; | |
3202 | gdbserver_state.fd = fd; | |
3203 | gdb_has_xml = false; | |
3204 | } | |
3205 | ||
3206 | static bool gdb_accept_socket(int gdb_fd) | |
3207 | { | |
3208 | int fd; | |
3209 | ||
3210 | for(;;) { | |
3211 | fd = accept(gdb_fd, NULL, NULL); | |
3212 | if (fd < 0 && errno != EINTR) { | |
3213 | perror("accept socket"); | |
3214 | return false; | |
3215 | } else if (fd >= 0) { | |
3216 | qemu_set_cloexec(fd); | |
3217 | break; | |
3218 | } | |
3219 | } | |
3220 | ||
3221 | gdb_accept_init(fd); | |
3222 | return true; | |
3223 | } | |
3224 | ||
3225 | static int gdbserver_open_socket(const char *path) | |
3226 | { | |
3227 | struct sockaddr_un sockaddr; | |
3228 | int fd, ret; | |
3229 | ||
3230 | fd = socket(AF_UNIX, SOCK_STREAM, 0); | |
3231 | if (fd < 0) { | |
3232 | perror("create socket"); | |
3233 | return -1; | |
3234 | } | |
3235 | ||
3236 | sockaddr.sun_family = AF_UNIX; | |
3237 | pstrcpy(sockaddr.sun_path, sizeof(sockaddr.sun_path) - 1, path); | |
3238 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
3239 | if (ret < 0) { | |
3240 | perror("bind socket"); | |
3241 | close(fd); | |
3242 | return -1; | |
3243 | } | |
3244 | ret = listen(fd, 1); | |
3245 | if (ret < 0) { | |
3246 | perror("listen socket"); | |
3247 | close(fd); | |
3248 | return -1; | |
3249 | } | |
3250 | ||
3251 | return fd; | |
3252 | } | |
3253 | ||
3254 | static bool gdb_accept_tcp(int gdb_fd) | |
858693c6 | 3255 | { |
858693c6 FB |
3256 | struct sockaddr_in sockaddr; |
3257 | socklen_t len; | |
bf1c852a | 3258 | int fd; |
858693c6 FB |
3259 | |
3260 | for(;;) { | |
3261 | len = sizeof(sockaddr); | |
e0a1e208 | 3262 | fd = accept(gdb_fd, (struct sockaddr *)&sockaddr, &len); |
858693c6 FB |
3263 | if (fd < 0 && errno != EINTR) { |
3264 | perror("accept"); | |
2f652224 | 3265 | return false; |
858693c6 | 3266 | } else if (fd >= 0) { |
f5bdd781 | 3267 | qemu_set_cloexec(fd); |
b4608c04 FB |
3268 | break; |
3269 | } | |
3270 | } | |
858693c6 FB |
3271 | |
3272 | /* set short latency */ | |
2f652224 PM |
3273 | if (socket_set_nodelay(fd)) { |
3274 | perror("setsockopt"); | |
ead75d84 | 3275 | close(fd); |
2f652224 PM |
3276 | return false; |
3277 | } | |
3b46e624 | 3278 | |
fcedd920 | 3279 | gdb_accept_init(fd); |
2f652224 | 3280 | return true; |
858693c6 FB |
3281 | } |
3282 | ||
fcedd920 | 3283 | static int gdbserver_open_port(int port) |
858693c6 FB |
3284 | { |
3285 | struct sockaddr_in sockaddr; | |
6669ca13 | 3286 | int fd, ret; |
858693c6 FB |
3287 | |
3288 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
3289 | if (fd < 0) { | |
3290 | perror("socket"); | |
3291 | return -1; | |
3292 | } | |
f5bdd781 | 3293 | qemu_set_cloexec(fd); |
858693c6 | 3294 | |
6669ca13 | 3295 | socket_set_fast_reuse(fd); |
858693c6 FB |
3296 | |
3297 | sockaddr.sin_family = AF_INET; | |
3298 | sockaddr.sin_port = htons(port); | |
3299 | sockaddr.sin_addr.s_addr = 0; | |
3300 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
3301 | if (ret < 0) { | |
3302 | perror("bind"); | |
bb16172c | 3303 | close(fd); |
858693c6 FB |
3304 | return -1; |
3305 | } | |
96165b9e | 3306 | ret = listen(fd, 1); |
858693c6 FB |
3307 | if (ret < 0) { |
3308 | perror("listen"); | |
bb16172c | 3309 | close(fd); |
858693c6 FB |
3310 | return -1; |
3311 | } | |
fcedd920 | 3312 | |
858693c6 FB |
3313 | return fd; |
3314 | } | |
3315 | ||
fcedd920 | 3316 | int gdbserver_start(const char *port_or_path) |
858693c6 | 3317 | { |
fcedd920 AB |
3318 | int port = g_ascii_strtoull(port_or_path, NULL, 10); |
3319 | int gdb_fd; | |
3320 | ||
3321 | if (port > 0) { | |
3322 | gdb_fd = gdbserver_open_port(port); | |
3323 | } else { | |
3324 | gdb_fd = gdbserver_open_socket(port_or_path); | |
3325 | } | |
3326 | ||
e0a1e208 | 3327 | if (gdb_fd < 0) { |
858693c6 | 3328 | return -1; |
e0a1e208 | 3329 | } |
fcedd920 AB |
3330 | |
3331 | if (port > 0 && gdb_accept_tcp(gdb_fd)) { | |
3332 | return 0; | |
3333 | } else if (gdb_accept_socket(gdb_fd)) { | |
3334 | gdbserver_state.socket_path = g_strdup(port_or_path); | |
3335 | return 0; | |
2f652224 | 3336 | } |
fcedd920 AB |
3337 | |
3338 | /* gone wrong */ | |
3339 | close(gdb_fd); | |
3340 | return -1; | |
4046d913 | 3341 | } |
2b1319c8 AJ |
3342 | |
3343 | /* Disable gdb stub for child processes. */ | |
f7ec7f7b | 3344 | void gdbserver_fork(CPUState *cpu) |
2b1319c8 | 3345 | { |
e0a1e208 | 3346 | if (!gdbserver_state.init || gdbserver_state.fd < 0) { |
75a34036 AF |
3347 | return; |
3348 | } | |
8d98c445 AB |
3349 | close(gdbserver_state.fd); |
3350 | gdbserver_state.fd = -1; | |
b3310ab3 | 3351 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
75a34036 | 3352 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
2b1319c8 | 3353 | } |
1fddef4b | 3354 | #else |
aa1f17c1 | 3355 | static int gdb_chr_can_receive(void *opaque) |
4046d913 | 3356 | { |
56aebc89 PB |
3357 | /* We can handle an arbitrarily large amount of data. |
3358 | Pick the maximum packet size, which is as good as anything. */ | |
3359 | return MAX_PACKET_LENGTH; | |
4046d913 PB |
3360 | } |
3361 | ||
aa1f17c1 | 3362 | static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
4046d913 | 3363 | { |
4046d913 PB |
3364 | int i; |
3365 | ||
3366 | for (i = 0; i < size; i++) { | |
a346af3e | 3367 | gdb_read_byte(buf[i]); |
4046d913 PB |
3368 | } |
3369 | } | |
3370 | ||
083b266f | 3371 | static void gdb_chr_event(void *opaque, QEMUChrEvent event) |
4046d913 | 3372 | { |
970ed906 LM |
3373 | int i; |
3374 | GDBState *s = (GDBState *) opaque; | |
3375 | ||
4046d913 | 3376 | switch (event) { |
b6b8df56 | 3377 | case CHR_EVENT_OPENED: |
970ed906 LM |
3378 | /* Start with first process attached, others detached */ |
3379 | for (i = 0; i < s->process_num; i++) { | |
3380 | s->processes[i].attached = !i; | |
3381 | } | |
3382 | ||
a346af3e | 3383 | s->c_cpu = gdb_first_attached_cpu(); |
970ed906 LM |
3384 | s->g_cpu = s->c_cpu; |
3385 | ||
0461d5a6 | 3386 | vm_stop(RUN_STATE_PAUSED); |
56357d80 | 3387 | replay_gdb_attached(); |
5b50e790 | 3388 | gdb_has_xml = false; |
4046d913 PB |
3389 | break; |
3390 | default: | |
3391 | break; | |
3392 | } | |
3393 | } | |
3394 | ||
0ec7b3e7 | 3395 | static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len) |
8a34a0fb | 3396 | { |
d86b4672 DH |
3397 | g_autoptr(GString) hex_buf = g_string_new("O"); |
3398 | memtohex(hex_buf, buf, len); | |
3399 | put_packet(hex_buf->str); | |
8a34a0fb AL |
3400 | return len; |
3401 | } | |
3402 | ||
59030a8c AL |
3403 | #ifndef _WIN32 |
3404 | static void gdb_sigterm_handler(int signal) | |
3405 | { | |
1354869c | 3406 | if (runstate_is_running()) { |
0461d5a6 | 3407 | vm_stop(RUN_STATE_PAUSED); |
e07bbac5 | 3408 | } |
59030a8c AL |
3409 | } |
3410 | #endif | |
3411 | ||
777357d7 MAL |
3412 | static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend, |
3413 | bool *be_opened, Error **errp) | |
3414 | { | |
3415 | *be_opened = false; | |
3416 | } | |
3417 | ||
3418 | static void char_gdb_class_init(ObjectClass *oc, void *data) | |
3419 | { | |
3420 | ChardevClass *cc = CHARDEV_CLASS(oc); | |
3421 | ||
3422 | cc->internal = true; | |
3423 | cc->open = gdb_monitor_open; | |
3424 | cc->chr_write = gdb_monitor_write; | |
3425 | } | |
3426 | ||
3427 | #define TYPE_CHARDEV_GDB "chardev-gdb" | |
3428 | ||
3429 | static const TypeInfo char_gdb_type_info = { | |
3430 | .name = TYPE_CHARDEV_GDB, | |
3431 | .parent = TYPE_CHARDEV, | |
3432 | .class_init = char_gdb_class_init, | |
3433 | }; | |
3434 | ||
8f468636 LM |
3435 | static int find_cpu_clusters(Object *child, void *opaque) |
3436 | { | |
3437 | if (object_dynamic_cast(child, TYPE_CPU_CLUSTER)) { | |
3438 | GDBState *s = (GDBState *) opaque; | |
3439 | CPUClusterState *cluster = CPU_CLUSTER(child); | |
3440 | GDBProcess *process; | |
3441 | ||
3442 | s->processes = g_renew(GDBProcess, s->processes, ++s->process_num); | |
3443 | ||
3444 | process = &s->processes[s->process_num - 1]; | |
3445 | ||
3446 | /* | |
3447 | * GDB process IDs -1 and 0 are reserved. To avoid subtle errors at | |
3448 | * runtime, we enforce here that the machine does not use a cluster ID | |
3449 | * that would lead to PID 0. | |
3450 | */ | |
3451 | assert(cluster->cluster_id != UINT32_MAX); | |
3452 | process->pid = cluster->cluster_id + 1; | |
3453 | process->attached = false; | |
c145eeae | 3454 | process->target_xml[0] = '\0'; |
8f468636 LM |
3455 | |
3456 | return 0; | |
3457 | } | |
3458 | ||
3459 | return object_child_foreach(child, find_cpu_clusters, opaque); | |
3460 | } | |
3461 | ||
3462 | static int pid_order(const void *a, const void *b) | |
3463 | { | |
3464 | GDBProcess *pa = (GDBProcess *) a; | |
3465 | GDBProcess *pb = (GDBProcess *) b; | |
3466 | ||
3467 | if (pa->pid < pb->pid) { | |
3468 | return -1; | |
3469 | } else if (pa->pid > pb->pid) { | |
3470 | return 1; | |
3471 | } else { | |
3472 | return 0; | |
3473 | } | |
3474 | } | |
3475 | ||
3476 | static void create_processes(GDBState *s) | |
3477 | { | |
3478 | object_child_foreach(object_get_root(), find_cpu_clusters, s); | |
3479 | ||
a346af3e | 3480 | if (gdbserver_state.processes) { |
8f468636 | 3481 | /* Sort by PID */ |
a346af3e | 3482 | qsort(gdbserver_state.processes, gdbserver_state.process_num, sizeof(gdbserver_state.processes[0]), pid_order); |
8f468636 LM |
3483 | } |
3484 | ||
3485 | create_default_process(s); | |
3486 | } | |
3487 | ||
59030a8c | 3488 | int gdbserver_start(const char *device) |
4046d913 | 3489 | { |
5c9522b3 DG |
3490 | trace_gdbstub_op_start(device); |
3491 | ||
59030a8c | 3492 | char gdbstub_device_name[128]; |
0ec7b3e7 MAL |
3493 | Chardev *chr = NULL; |
3494 | Chardev *mon_chr; | |
cfc3475a | 3495 | |
508b4ecc ZY |
3496 | if (!first_cpu) { |
3497 | error_report("gdbstub: meaningless to attach gdb to a " | |
3498 | "machine without any CPU."); | |
3499 | return -1; | |
3500 | } | |
3501 | ||
59030a8c AL |
3502 | if (!device) |
3503 | return -1; | |
3504 | if (strcmp(device, "none") != 0) { | |
3505 | if (strstart(device, "tcp:", NULL)) { | |
3506 | /* enforce required TCP attributes */ | |
3507 | snprintf(gdbstub_device_name, sizeof(gdbstub_device_name), | |
a9b1315f | 3508 | "%s,wait=off,nodelay=on,server=on", device); |
59030a8c | 3509 | device = gdbstub_device_name; |
36556b20 | 3510 | } |
59030a8c AL |
3511 | #ifndef _WIN32 |
3512 | else if (strcmp(device, "stdio") == 0) { | |
3513 | struct sigaction act; | |
4046d913 | 3514 | |
59030a8c AL |
3515 | memset(&act, 0, sizeof(act)); |
3516 | act.sa_handler = gdb_sigterm_handler; | |
3517 | sigaction(SIGINT, &act, NULL); | |
3518 | } | |
3519 | #endif | |
95e30b2a MAL |
3520 | /* |
3521 | * FIXME: it's a bit weird to allow using a mux chardev here | |
3522 | * and implicitly setup a monitor. We may want to break this. | |
3523 | */ | |
4ad6f6cb | 3524 | chr = qemu_chr_new_noreplay("gdb", device, true, NULL); |
36556b20 AL |
3525 | if (!chr) |
3526 | return -1; | |
cfc3475a PB |
3527 | } |
3528 | ||
8d98c445 AB |
3529 | if (!gdbserver_state.init) { |
3530 | init_gdbserver_state(); | |
4046d913 | 3531 | |
36556b20 AL |
3532 | qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL); |
3533 | ||
3534 | /* Initialize a monitor terminal for gdb */ | |
777357d7 | 3535 | mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB, |
4ad6f6cb | 3536 | NULL, NULL, &error_abort); |
8e9119a8 | 3537 | monitor_init_hmp(mon_chr, false, &error_abort); |
36556b20 | 3538 | } else { |
8d98c445 AB |
3539 | qemu_chr_fe_deinit(&gdbserver_state.chr, true); |
3540 | mon_chr = gdbserver_state.mon_chr; | |
3541 | reset_gdbserver_state(); | |
36556b20 | 3542 | } |
8f468636 | 3543 | |
8d98c445 | 3544 | create_processes(&gdbserver_state); |
8f468636 | 3545 | |
32a6ebec | 3546 | if (chr) { |
8d98c445 AB |
3547 | qemu_chr_fe_init(&gdbserver_state.chr, chr, &error_abort); |
3548 | qemu_chr_fe_set_handlers(&gdbserver_state.chr, gdb_chr_can_receive, | |
3549 | gdb_chr_receive, gdb_chr_event, | |
3550 | NULL, &gdbserver_state, NULL, true); | |
32a6ebec | 3551 | } |
8d98c445 AB |
3552 | gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE; |
3553 | gdbserver_state.mon_chr = mon_chr; | |
3554 | gdbserver_state.current_syscall_cb = NULL; | |
8a34a0fb | 3555 | |
b4608c04 FB |
3556 | return 0; |
3557 | } | |
777357d7 MAL |
3558 | |
3559 | static void register_types(void) | |
3560 | { | |
3561 | type_register_static(&char_gdb_type_info); | |
3562 | } | |
3563 | ||
3564 | type_init(register_types); | |
4046d913 | 3565 | #endif |