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Commit | Line | Data |
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b4608c04 FB |
1 | /* |
2 | * gdb server stub | |
5fafdf24 | 3 | * |
3475187d | 4 | * Copyright (c) 2003-2005 Fabrice Bellard |
b4608c04 FB |
5 | * |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
8167ee88 | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
b4608c04 | 18 | */ |
978efd6a | 19 | #include "config.h" |
56aebc89 | 20 | #include "qemu-common.h" |
1fddef4b FB |
21 | #ifdef CONFIG_USER_ONLY |
22 | #include <stdlib.h> | |
23 | #include <stdio.h> | |
24 | #include <stdarg.h> | |
25 | #include <string.h> | |
26 | #include <errno.h> | |
27 | #include <unistd.h> | |
978efd6a | 28 | #include <fcntl.h> |
1fddef4b FB |
29 | |
30 | #include "qemu.h" | |
31 | #else | |
83c9089e | 32 | #include "monitor/monitor.h" |
dccfcd0e | 33 | #include "sysemu/char.h" |
9c17d615 | 34 | #include "sysemu/sysemu.h" |
022c62cb | 35 | #include "exec/gdbstub.h" |
1fddef4b | 36 | #endif |
67b915a5 | 37 | |
56aebc89 PB |
38 | #define MAX_PACKET_LENGTH 4096 |
39 | ||
2b41f10e | 40 | #include "cpu.h" |
1de7afc9 | 41 | #include "qemu/sockets.h" |
9c17d615 | 42 | #include "sysemu/kvm.h" |
cfe67cef | 43 | #include "exec/semihost.h" |
ca587a8e | 44 | |
a3919386 JK |
45 | #ifdef CONFIG_USER_ONLY |
46 | #define GDB_ATTACHED "0" | |
47 | #else | |
48 | #define GDB_ATTACHED "1" | |
49 | #endif | |
50 | ||
f3659eee AF |
51 | static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, |
52 | uint8_t *buf, int len, bool is_write) | |
44520db1 | 53 | { |
f3659eee AF |
54 | CPUClass *cc = CPU_GET_CLASS(cpu); |
55 | ||
56 | if (cc->memory_rw_debug) { | |
57 | return cc->memory_rw_debug(cpu, addr, buf, len, is_write); | |
58 | } | |
59 | return cpu_memory_rw_debug(cpu, addr, buf, len, is_write); | |
44520db1 | 60 | } |
ca587a8e AJ |
61 | |
62 | enum { | |
63 | GDB_SIGNAL_0 = 0, | |
64 | GDB_SIGNAL_INT = 2, | |
425189a8 | 65 | GDB_SIGNAL_QUIT = 3, |
ca587a8e | 66 | GDB_SIGNAL_TRAP = 5, |
425189a8 JK |
67 | GDB_SIGNAL_ABRT = 6, |
68 | GDB_SIGNAL_ALRM = 14, | |
69 | GDB_SIGNAL_IO = 23, | |
70 | GDB_SIGNAL_XCPU = 24, | |
ca587a8e AJ |
71 | GDB_SIGNAL_UNKNOWN = 143 |
72 | }; | |
73 | ||
74 | #ifdef CONFIG_USER_ONLY | |
75 | ||
76 | /* Map target signal numbers to GDB protocol signal numbers and vice | |
77 | * versa. For user emulation's currently supported systems, we can | |
78 | * assume most signals are defined. | |
79 | */ | |
80 | ||
81 | static int gdb_signal_table[] = { | |
82 | 0, | |
83 | TARGET_SIGHUP, | |
84 | TARGET_SIGINT, | |
85 | TARGET_SIGQUIT, | |
86 | TARGET_SIGILL, | |
87 | TARGET_SIGTRAP, | |
88 | TARGET_SIGABRT, | |
89 | -1, /* SIGEMT */ | |
90 | TARGET_SIGFPE, | |
91 | TARGET_SIGKILL, | |
92 | TARGET_SIGBUS, | |
93 | TARGET_SIGSEGV, | |
94 | TARGET_SIGSYS, | |
95 | TARGET_SIGPIPE, | |
96 | TARGET_SIGALRM, | |
97 | TARGET_SIGTERM, | |
98 | TARGET_SIGURG, | |
99 | TARGET_SIGSTOP, | |
100 | TARGET_SIGTSTP, | |
101 | TARGET_SIGCONT, | |
102 | TARGET_SIGCHLD, | |
103 | TARGET_SIGTTIN, | |
104 | TARGET_SIGTTOU, | |
105 | TARGET_SIGIO, | |
106 | TARGET_SIGXCPU, | |
107 | TARGET_SIGXFSZ, | |
108 | TARGET_SIGVTALRM, | |
109 | TARGET_SIGPROF, | |
110 | TARGET_SIGWINCH, | |
111 | -1, /* SIGLOST */ | |
112 | TARGET_SIGUSR1, | |
113 | TARGET_SIGUSR2, | |
c72d5bf8 | 114 | #ifdef TARGET_SIGPWR |
ca587a8e | 115 | TARGET_SIGPWR, |
c72d5bf8 BS |
116 | #else |
117 | -1, | |
118 | #endif | |
ca587a8e AJ |
119 | -1, /* SIGPOLL */ |
120 | -1, | |
121 | -1, | |
122 | -1, | |
123 | -1, | |
124 | -1, | |
125 | -1, | |
126 | -1, | |
127 | -1, | |
128 | -1, | |
129 | -1, | |
130 | -1, | |
c72d5bf8 | 131 | #ifdef __SIGRTMIN |
ca587a8e AJ |
132 | __SIGRTMIN + 1, |
133 | __SIGRTMIN + 2, | |
134 | __SIGRTMIN + 3, | |
135 | __SIGRTMIN + 4, | |
136 | __SIGRTMIN + 5, | |
137 | __SIGRTMIN + 6, | |
138 | __SIGRTMIN + 7, | |
139 | __SIGRTMIN + 8, | |
140 | __SIGRTMIN + 9, | |
141 | __SIGRTMIN + 10, | |
142 | __SIGRTMIN + 11, | |
143 | __SIGRTMIN + 12, | |
144 | __SIGRTMIN + 13, | |
145 | __SIGRTMIN + 14, | |
146 | __SIGRTMIN + 15, | |
147 | __SIGRTMIN + 16, | |
148 | __SIGRTMIN + 17, | |
149 | __SIGRTMIN + 18, | |
150 | __SIGRTMIN + 19, | |
151 | __SIGRTMIN + 20, | |
152 | __SIGRTMIN + 21, | |
153 | __SIGRTMIN + 22, | |
154 | __SIGRTMIN + 23, | |
155 | __SIGRTMIN + 24, | |
156 | __SIGRTMIN + 25, | |
157 | __SIGRTMIN + 26, | |
158 | __SIGRTMIN + 27, | |
159 | __SIGRTMIN + 28, | |
160 | __SIGRTMIN + 29, | |
161 | __SIGRTMIN + 30, | |
162 | __SIGRTMIN + 31, | |
163 | -1, /* SIGCANCEL */ | |
164 | __SIGRTMIN, | |
165 | __SIGRTMIN + 32, | |
166 | __SIGRTMIN + 33, | |
167 | __SIGRTMIN + 34, | |
168 | __SIGRTMIN + 35, | |
169 | __SIGRTMIN + 36, | |
170 | __SIGRTMIN + 37, | |
171 | __SIGRTMIN + 38, | |
172 | __SIGRTMIN + 39, | |
173 | __SIGRTMIN + 40, | |
174 | __SIGRTMIN + 41, | |
175 | __SIGRTMIN + 42, | |
176 | __SIGRTMIN + 43, | |
177 | __SIGRTMIN + 44, | |
178 | __SIGRTMIN + 45, | |
179 | __SIGRTMIN + 46, | |
180 | __SIGRTMIN + 47, | |
181 | __SIGRTMIN + 48, | |
182 | __SIGRTMIN + 49, | |
183 | __SIGRTMIN + 50, | |
184 | __SIGRTMIN + 51, | |
185 | __SIGRTMIN + 52, | |
186 | __SIGRTMIN + 53, | |
187 | __SIGRTMIN + 54, | |
188 | __SIGRTMIN + 55, | |
189 | __SIGRTMIN + 56, | |
190 | __SIGRTMIN + 57, | |
191 | __SIGRTMIN + 58, | |
192 | __SIGRTMIN + 59, | |
193 | __SIGRTMIN + 60, | |
194 | __SIGRTMIN + 61, | |
195 | __SIGRTMIN + 62, | |
196 | __SIGRTMIN + 63, | |
197 | __SIGRTMIN + 64, | |
198 | __SIGRTMIN + 65, | |
199 | __SIGRTMIN + 66, | |
200 | __SIGRTMIN + 67, | |
201 | __SIGRTMIN + 68, | |
202 | __SIGRTMIN + 69, | |
203 | __SIGRTMIN + 70, | |
204 | __SIGRTMIN + 71, | |
205 | __SIGRTMIN + 72, | |
206 | __SIGRTMIN + 73, | |
207 | __SIGRTMIN + 74, | |
208 | __SIGRTMIN + 75, | |
209 | __SIGRTMIN + 76, | |
210 | __SIGRTMIN + 77, | |
211 | __SIGRTMIN + 78, | |
212 | __SIGRTMIN + 79, | |
213 | __SIGRTMIN + 80, | |
214 | __SIGRTMIN + 81, | |
215 | __SIGRTMIN + 82, | |
216 | __SIGRTMIN + 83, | |
217 | __SIGRTMIN + 84, | |
218 | __SIGRTMIN + 85, | |
219 | __SIGRTMIN + 86, | |
220 | __SIGRTMIN + 87, | |
221 | __SIGRTMIN + 88, | |
222 | __SIGRTMIN + 89, | |
223 | __SIGRTMIN + 90, | |
224 | __SIGRTMIN + 91, | |
225 | __SIGRTMIN + 92, | |
226 | __SIGRTMIN + 93, | |
227 | __SIGRTMIN + 94, | |
228 | __SIGRTMIN + 95, | |
229 | -1, /* SIGINFO */ | |
230 | -1, /* UNKNOWN */ | |
231 | -1, /* DEFAULT */ | |
232 | -1, | |
233 | -1, | |
234 | -1, | |
235 | -1, | |
236 | -1, | |
237 | -1 | |
c72d5bf8 | 238 | #endif |
ca587a8e | 239 | }; |
8f447cc7 | 240 | #else |
ca587a8e AJ |
241 | /* In system mode we only need SIGINT and SIGTRAP; other signals |
242 | are not yet supported. */ | |
243 | ||
244 | enum { | |
245 | TARGET_SIGINT = 2, | |
246 | TARGET_SIGTRAP = 5 | |
247 | }; | |
248 | ||
249 | static int gdb_signal_table[] = { | |
250 | -1, | |
251 | -1, | |
252 | TARGET_SIGINT, | |
253 | -1, | |
254 | -1, | |
255 | TARGET_SIGTRAP | |
256 | }; | |
257 | #endif | |
258 | ||
259 | #ifdef CONFIG_USER_ONLY | |
260 | static int target_signal_to_gdb (int sig) | |
261 | { | |
262 | int i; | |
263 | for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++) | |
264 | if (gdb_signal_table[i] == sig) | |
265 | return i; | |
266 | return GDB_SIGNAL_UNKNOWN; | |
267 | } | |
8f447cc7 | 268 | #endif |
b4608c04 | 269 | |
ca587a8e AJ |
270 | static int gdb_signal_to_target (int sig) |
271 | { | |
272 | if (sig < ARRAY_SIZE (gdb_signal_table)) | |
273 | return gdb_signal_table[sig]; | |
274 | else | |
275 | return -1; | |
276 | } | |
277 | ||
4abe615b | 278 | //#define DEBUG_GDB |
b4608c04 | 279 | |
56aebc89 PB |
280 | typedef struct GDBRegisterState { |
281 | int base_reg; | |
282 | int num_regs; | |
283 | gdb_reg_cb get_reg; | |
284 | gdb_reg_cb set_reg; | |
285 | const char *xml; | |
286 | struct GDBRegisterState *next; | |
287 | } GDBRegisterState; | |
288 | ||
858693c6 | 289 | enum RSState { |
36556b20 | 290 | RS_INACTIVE, |
858693c6 FB |
291 | RS_IDLE, |
292 | RS_GETLINE, | |
293 | RS_CHKSUM1, | |
294 | RS_CHKSUM2, | |
295 | }; | |
858693c6 | 296 | typedef struct GDBState { |
2e0f2cfb AF |
297 | CPUState *c_cpu; /* current CPU for step/continue ops */ |
298 | CPUState *g_cpu; /* current CPU for other ops */ | |
52f34623 | 299 | CPUState *query_cpu; /* for q{f|s}ThreadInfo */ |
41625033 | 300 | enum RSState state; /* parsing state */ |
56aebc89 | 301 | char line_buf[MAX_PACKET_LENGTH]; |
858693c6 FB |
302 | int line_buf_index; |
303 | int line_csum; | |
56aebc89 | 304 | uint8_t last_packet[MAX_PACKET_LENGTH + 4]; |
4046d913 | 305 | int last_packet_len; |
1f487ee9 | 306 | int signal; |
41625033 | 307 | #ifdef CONFIG_USER_ONLY |
4046d913 | 308 | int fd; |
41625033 | 309 | int running_state; |
4046d913 PB |
310 | #else |
311 | CharDriverState *chr; | |
8a34a0fb | 312 | CharDriverState *mon_chr; |
41625033 | 313 | #endif |
cdb432b2 MI |
314 | char syscall_buf[256]; |
315 | gdb_syscall_complete_cb current_syscall_cb; | |
858693c6 | 316 | } GDBState; |
b4608c04 | 317 | |
60897d36 EI |
318 | /* By default use no IRQs and no timers while single stepping so as to |
319 | * make single stepping like an ICE HW step. | |
320 | */ | |
321 | static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; | |
322 | ||
880a7578 AL |
323 | static GDBState *gdbserver_state; |
324 | ||
5b50e790 | 325 | bool gdb_has_xml; |
56aebc89 | 326 | |
1fddef4b | 327 | #ifdef CONFIG_USER_ONLY |
4046d913 PB |
328 | /* XXX: This is not thread safe. Do we care? */ |
329 | static int gdbserver_fd = -1; | |
330 | ||
858693c6 | 331 | static int get_char(GDBState *s) |
b4608c04 FB |
332 | { |
333 | uint8_t ch; | |
334 | int ret; | |
335 | ||
336 | for(;;) { | |
00aa0040 | 337 | ret = qemu_recv(s->fd, &ch, 1, 0); |
b4608c04 | 338 | if (ret < 0) { |
1f487ee9 EI |
339 | if (errno == ECONNRESET) |
340 | s->fd = -1; | |
b4608c04 FB |
341 | if (errno != EINTR && errno != EAGAIN) |
342 | return -1; | |
343 | } else if (ret == 0) { | |
1f487ee9 EI |
344 | close(s->fd); |
345 | s->fd = -1; | |
b4608c04 FB |
346 | return -1; |
347 | } else { | |
348 | break; | |
349 | } | |
350 | } | |
351 | return ch; | |
352 | } | |
4046d913 | 353 | #endif |
b4608c04 | 354 | |
654efcf3 | 355 | static enum { |
a2d1ebaf PB |
356 | GDB_SYS_UNKNOWN, |
357 | GDB_SYS_ENABLED, | |
358 | GDB_SYS_DISABLED, | |
359 | } gdb_syscall_mode; | |
360 | ||
a38bb079 | 361 | /* Decide if either remote gdb syscalls or native file IO should be used. */ |
a2d1ebaf PB |
362 | int use_gdb_syscalls(void) |
363 | { | |
cfe67cef LA |
364 | SemihostingTarget target = semihosting_get_target(); |
365 | if (target == SEMIHOSTING_TARGET_NATIVE) { | |
a38bb079 LI |
366 | /* -semihosting-config target=native */ |
367 | return false; | |
cfe67cef | 368 | } else if (target == SEMIHOSTING_TARGET_GDB) { |
a38bb079 LI |
369 | /* -semihosting-config target=gdb */ |
370 | return true; | |
371 | } | |
372 | ||
373 | /* -semihosting-config target=auto */ | |
374 | /* On the first call check if gdb is connected and remember. */ | |
a2d1ebaf | 375 | if (gdb_syscall_mode == GDB_SYS_UNKNOWN) { |
880a7578 AL |
376 | gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED |
377 | : GDB_SYS_DISABLED); | |
a2d1ebaf PB |
378 | } |
379 | return gdb_syscall_mode == GDB_SYS_ENABLED; | |
380 | } | |
381 | ||
ba70a624 EI |
382 | /* Resume execution. */ |
383 | static inline void gdb_continue(GDBState *s) | |
384 | { | |
385 | #ifdef CONFIG_USER_ONLY | |
386 | s->running_state = 1; | |
387 | #else | |
26ac7a31 | 388 | if (!runstate_needs_reset()) { |
87f25c12 PB |
389 | vm_start(); |
390 | } | |
ba70a624 EI |
391 | #endif |
392 | } | |
393 | ||
858693c6 | 394 | static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
b4608c04 | 395 | { |
4046d913 | 396 | #ifdef CONFIG_USER_ONLY |
b4608c04 FB |
397 | int ret; |
398 | ||
399 | while (len > 0) { | |
8f447cc7 | 400 | ret = send(s->fd, buf, len, 0); |
b4608c04 FB |
401 | if (ret < 0) { |
402 | if (errno != EINTR && errno != EAGAIN) | |
403 | return; | |
404 | } else { | |
405 | buf += ret; | |
406 | len -= ret; | |
407 | } | |
408 | } | |
4046d913 | 409 | #else |
2cc6e0a1 | 410 | qemu_chr_fe_write(s->chr, buf, len); |
4046d913 | 411 | #endif |
b4608c04 FB |
412 | } |
413 | ||
414 | static inline int fromhex(int v) | |
415 | { | |
416 | if (v >= '0' && v <= '9') | |
417 | return v - '0'; | |
418 | else if (v >= 'A' && v <= 'F') | |
419 | return v - 'A' + 10; | |
420 | else if (v >= 'a' && v <= 'f') | |
421 | return v - 'a' + 10; | |
422 | else | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static inline int tohex(int v) | |
427 | { | |
428 | if (v < 10) | |
429 | return v + '0'; | |
430 | else | |
431 | return v - 10 + 'a'; | |
432 | } | |
433 | ||
434 | static void memtohex(char *buf, const uint8_t *mem, int len) | |
435 | { | |
436 | int i, c; | |
437 | char *q; | |
438 | q = buf; | |
439 | for(i = 0; i < len; i++) { | |
440 | c = mem[i]; | |
441 | *q++ = tohex(c >> 4); | |
442 | *q++ = tohex(c & 0xf); | |
443 | } | |
444 | *q = '\0'; | |
445 | } | |
446 | ||
447 | static void hextomem(uint8_t *mem, const char *buf, int len) | |
448 | { | |
449 | int i; | |
450 | ||
451 | for(i = 0; i < len; i++) { | |
452 | mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); | |
453 | buf += 2; | |
454 | } | |
455 | } | |
456 | ||
b4608c04 | 457 | /* return -1 if error, 0 if OK */ |
56aebc89 | 458 | static int put_packet_binary(GDBState *s, const char *buf, int len) |
b4608c04 | 459 | { |
56aebc89 | 460 | int csum, i; |
60fe76f3 | 461 | uint8_t *p; |
b4608c04 | 462 | |
b4608c04 | 463 | for(;;) { |
4046d913 PB |
464 | p = s->last_packet; |
465 | *(p++) = '$'; | |
4046d913 PB |
466 | memcpy(p, buf, len); |
467 | p += len; | |
b4608c04 FB |
468 | csum = 0; |
469 | for(i = 0; i < len; i++) { | |
470 | csum += buf[i]; | |
471 | } | |
4046d913 PB |
472 | *(p++) = '#'; |
473 | *(p++) = tohex((csum >> 4) & 0xf); | |
474 | *(p++) = tohex((csum) & 0xf); | |
b4608c04 | 475 | |
4046d913 | 476 | s->last_packet_len = p - s->last_packet; |
ffe8ab83 | 477 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
b4608c04 | 478 | |
4046d913 PB |
479 | #ifdef CONFIG_USER_ONLY |
480 | i = get_char(s); | |
481 | if (i < 0) | |
b4608c04 | 482 | return -1; |
4046d913 | 483 | if (i == '+') |
b4608c04 | 484 | break; |
4046d913 PB |
485 | #else |
486 | break; | |
487 | #endif | |
b4608c04 FB |
488 | } |
489 | return 0; | |
490 | } | |
491 | ||
56aebc89 PB |
492 | /* return -1 if error, 0 if OK */ |
493 | static int put_packet(GDBState *s, const char *buf) | |
494 | { | |
495 | #ifdef DEBUG_GDB | |
496 | printf("reply='%s'\n", buf); | |
497 | #endif | |
79808573 | 498 | |
56aebc89 PB |
499 | return put_packet_binary(s, buf, strlen(buf)); |
500 | } | |
501 | ||
56aebc89 PB |
502 | /* Encode data using the encoding for 'x' packets. */ |
503 | static int memtox(char *buf, const char *mem, int len) | |
504 | { | |
505 | char *p = buf; | |
506 | char c; | |
507 | ||
508 | while (len--) { | |
509 | c = *(mem++); | |
510 | switch (c) { | |
511 | case '#': case '$': case '*': case '}': | |
512 | *(p++) = '}'; | |
513 | *(p++) = c ^ 0x20; | |
514 | break; | |
515 | default: | |
516 | *(p++) = c; | |
517 | break; | |
518 | } | |
519 | } | |
520 | return p - buf; | |
521 | } | |
f1ccf904 | 522 | |
5b24c641 AF |
523 | static const char *get_feature_xml(const char *p, const char **newp, |
524 | CPUClass *cc) | |
56aebc89 | 525 | { |
56aebc89 PB |
526 | size_t len; |
527 | int i; | |
528 | const char *name; | |
529 | static char target_xml[1024]; | |
530 | ||
531 | len = 0; | |
532 | while (p[len] && p[len] != ':') | |
533 | len++; | |
534 | *newp = p + len; | |
535 | ||
536 | name = NULL; | |
537 | if (strncmp(p, "target.xml", len) == 0) { | |
538 | /* Generate the XML description for this CPU. */ | |
539 | if (!target_xml[0]) { | |
540 | GDBRegisterState *r; | |
eac8b355 | 541 | CPUState *cpu = first_cpu; |
56aebc89 | 542 | |
b3820e6c DH |
543 | pstrcat(target_xml, sizeof(target_xml), |
544 | "<?xml version=\"1.0\"?>" | |
545 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">" | |
546 | "<target>"); | |
547 | if (cc->gdb_arch_name) { | |
548 | gchar *arch = cc->gdb_arch_name(cpu); | |
549 | pstrcat(target_xml, sizeof(target_xml), "<architecture>"); | |
550 | pstrcat(target_xml, sizeof(target_xml), arch); | |
551 | pstrcat(target_xml, sizeof(target_xml), "</architecture>"); | |
552 | g_free(arch); | |
553 | } | |
554 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); | |
555 | pstrcat(target_xml, sizeof(target_xml), cc->gdb_core_xml_file); | |
556 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
eac8b355 | 557 | for (r = cpu->gdb_regs; r; r = r->next) { |
2dc766da BS |
558 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); |
559 | pstrcat(target_xml, sizeof(target_xml), r->xml); | |
560 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
56aebc89 | 561 | } |
2dc766da | 562 | pstrcat(target_xml, sizeof(target_xml), "</target>"); |
56aebc89 PB |
563 | } |
564 | return target_xml; | |
565 | } | |
566 | for (i = 0; ; i++) { | |
567 | name = xml_builtin[i][0]; | |
568 | if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) | |
569 | break; | |
570 | } | |
571 | return name ? xml_builtin[i][1] : NULL; | |
572 | } | |
f1ccf904 | 573 | |
385b9f0e | 574 | static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
56aebc89 | 575 | { |
a0e372f0 | 576 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 577 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 578 | GDBRegisterState *r; |
f1ccf904 | 579 | |
a0e372f0 | 580 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 581 | return cc->gdb_read_register(cpu, mem_buf, reg); |
a0e372f0 | 582 | } |
f1ccf904 | 583 | |
eac8b355 | 584 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
585 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
586 | return r->get_reg(env, mem_buf, reg - r->base_reg); | |
587 | } | |
588 | } | |
589 | return 0; | |
f1ccf904 TS |
590 | } |
591 | ||
385b9f0e | 592 | static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
f1ccf904 | 593 | { |
a0e372f0 | 594 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 595 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 596 | GDBRegisterState *r; |
f1ccf904 | 597 | |
a0e372f0 | 598 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 599 | return cc->gdb_write_register(cpu, mem_buf, reg); |
a0e372f0 | 600 | } |
56aebc89 | 601 | |
eac8b355 | 602 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
603 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
604 | return r->set_reg(env, mem_buf, reg - r->base_reg); | |
605 | } | |
606 | } | |
6da41eaf FB |
607 | return 0; |
608 | } | |
609 | ||
56aebc89 PB |
610 | /* Register a supplemental set of CPU registers. If g_pos is nonzero it |
611 | specifies the first register number and these registers are included in | |
612 | a standard "g" packet. Direction is relative to gdb, i.e. get_reg is | |
613 | gdb reading a CPU register, and set_reg is gdb modifying a CPU register. | |
614 | */ | |
615 | ||
22169d41 AF |
616 | void gdb_register_coprocessor(CPUState *cpu, |
617 | gdb_reg_cb get_reg, gdb_reg_cb set_reg, | |
618 | int num_regs, const char *xml, int g_pos) | |
6da41eaf | 619 | { |
56aebc89 PB |
620 | GDBRegisterState *s; |
621 | GDBRegisterState **p; | |
56aebc89 | 622 | |
eac8b355 | 623 | p = &cpu->gdb_regs; |
56aebc89 PB |
624 | while (*p) { |
625 | /* Check for duplicates. */ | |
626 | if (strcmp((*p)->xml, xml) == 0) | |
627 | return; | |
628 | p = &(*p)->next; | |
629 | } | |
9643c25f SW |
630 | |
631 | s = g_new0(GDBRegisterState, 1); | |
a0e372f0 | 632 | s->base_reg = cpu->gdb_num_regs; |
9643c25f SW |
633 | s->num_regs = num_regs; |
634 | s->get_reg = get_reg; | |
635 | s->set_reg = set_reg; | |
636 | s->xml = xml; | |
637 | ||
56aebc89 | 638 | /* Add to end of list. */ |
a0e372f0 | 639 | cpu->gdb_num_regs += num_regs; |
56aebc89 PB |
640 | *p = s; |
641 | if (g_pos) { | |
642 | if (g_pos != s->base_reg) { | |
643 | fprintf(stderr, "Error: Bad gdb register numbering for '%s'\n" | |
644 | "Expected %d got %d\n", xml, g_pos, s->base_reg); | |
35143f01 AF |
645 | } else { |
646 | cpu->gdb_num_g_regs = cpu->gdb_num_regs; | |
56aebc89 PB |
647 | } |
648 | } | |
6da41eaf FB |
649 | } |
650 | ||
a1d1bb31 | 651 | #ifndef CONFIG_USER_ONLY |
2472b6c0 PM |
652 | /* Translate GDB watchpoint type to a flags value for cpu_watchpoint_* */ |
653 | static inline int xlat_gdb_type(CPUState *cpu, int gdbtype) | |
654 | { | |
655 | static const int xlat[] = { | |
656 | [GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, | |
657 | [GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, | |
658 | [GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, | |
659 | }; | |
660 | ||
661 | CPUClass *cc = CPU_GET_CLASS(cpu); | |
662 | int cputype = xlat[gdbtype]; | |
663 | ||
664 | if (cc->gdb_stop_before_watchpoint) { | |
665 | cputype |= BP_STOP_BEFORE_ACCESS; | |
666 | } | |
667 | return cputype; | |
668 | } | |
a1d1bb31 AL |
669 | #endif |
670 | ||
880a7578 | 671 | static int gdb_breakpoint_insert(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 672 | { |
182735ef | 673 | CPUState *cpu; |
880a7578 AL |
674 | int err = 0; |
675 | ||
62278814 | 676 | if (kvm_enabled()) { |
2e0f2cfb | 677 | return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 678 | } |
e22a25c9 | 679 | |
a1d1bb31 AL |
680 | switch (type) { |
681 | case GDB_BREAKPOINT_SW: | |
682 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 683 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
684 | err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL); |
685 | if (err) { | |
880a7578 | 686 | break; |
b3310ab3 | 687 | } |
880a7578 AL |
688 | } |
689 | return err; | |
a1d1bb31 AL |
690 | #ifndef CONFIG_USER_ONLY |
691 | case GDB_WATCHPOINT_WRITE: | |
692 | case GDB_WATCHPOINT_READ: | |
693 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 694 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
695 | err = cpu_watchpoint_insert(cpu, addr, len, |
696 | xlat_gdb_type(cpu, type), NULL); | |
697 | if (err) { | |
880a7578 | 698 | break; |
2472b6c0 | 699 | } |
880a7578 AL |
700 | } |
701 | return err; | |
a1d1bb31 AL |
702 | #endif |
703 | default: | |
704 | return -ENOSYS; | |
705 | } | |
706 | } | |
707 | ||
880a7578 | 708 | static int gdb_breakpoint_remove(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 709 | { |
182735ef | 710 | CPUState *cpu; |
880a7578 AL |
711 | int err = 0; |
712 | ||
62278814 | 713 | if (kvm_enabled()) { |
2e0f2cfb | 714 | return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 715 | } |
e22a25c9 | 716 | |
a1d1bb31 AL |
717 | switch (type) { |
718 | case GDB_BREAKPOINT_SW: | |
719 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 720 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
721 | err = cpu_breakpoint_remove(cpu, addr, BP_GDB); |
722 | if (err) { | |
880a7578 | 723 | break; |
b3310ab3 | 724 | } |
880a7578 AL |
725 | } |
726 | return err; | |
a1d1bb31 AL |
727 | #ifndef CONFIG_USER_ONLY |
728 | case GDB_WATCHPOINT_WRITE: | |
729 | case GDB_WATCHPOINT_READ: | |
730 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 731 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
732 | err = cpu_watchpoint_remove(cpu, addr, len, |
733 | xlat_gdb_type(cpu, type)); | |
880a7578 AL |
734 | if (err) |
735 | break; | |
736 | } | |
737 | return err; | |
a1d1bb31 AL |
738 | #endif |
739 | default: | |
740 | return -ENOSYS; | |
741 | } | |
742 | } | |
743 | ||
880a7578 | 744 | static void gdb_breakpoint_remove_all(void) |
a1d1bb31 | 745 | { |
182735ef | 746 | CPUState *cpu; |
880a7578 | 747 | |
e22a25c9 | 748 | if (kvm_enabled()) { |
2e0f2cfb | 749 | kvm_remove_all_breakpoints(gdbserver_state->c_cpu); |
e22a25c9 AL |
750 | return; |
751 | } | |
752 | ||
bdc44640 | 753 | CPU_FOREACH(cpu) { |
b3310ab3 | 754 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 755 | #ifndef CONFIG_USER_ONLY |
75a34036 | 756 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 757 | #endif |
880a7578 | 758 | } |
a1d1bb31 AL |
759 | } |
760 | ||
fab9d284 AJ |
761 | static void gdb_set_cpu_pc(GDBState *s, target_ulong pc) |
762 | { | |
2e0f2cfb | 763 | CPUState *cpu = s->c_cpu; |
f45748f1 AF |
764 | |
765 | cpu_synchronize_state(cpu); | |
4a2b24ed | 766 | cpu_set_pc(cpu, pc); |
fab9d284 AJ |
767 | } |
768 | ||
2e0f2cfb | 769 | static CPUState *find_cpu(uint32_t thread_id) |
1e9fa730 | 770 | { |
0d34282f | 771 | CPUState *cpu; |
1e9fa730 | 772 | |
bdc44640 | 773 | CPU_FOREACH(cpu) { |
aa48dd93 | 774 | if (cpu_index(cpu) == thread_id) { |
2e0f2cfb | 775 | return cpu; |
aa48dd93 | 776 | } |
1e9fa730 | 777 | } |
aa48dd93 AF |
778 | |
779 | return NULL; | |
1e9fa730 NF |
780 | } |
781 | ||
4dabe747 JK |
782 | static int is_query_packet(const char *p, const char *query, char separator) |
783 | { | |
784 | unsigned int query_len = strlen(query); | |
785 | ||
786 | return strncmp(p, query, query_len) == 0 && | |
787 | (p[query_len] == '\0' || p[query_len] == separator); | |
788 | } | |
789 | ||
880a7578 | 790 | static int gdb_handle_packet(GDBState *s, const char *line_buf) |
b4608c04 | 791 | { |
2e0f2cfb | 792 | CPUState *cpu; |
5b24c641 | 793 | CPUClass *cc; |
b4608c04 | 794 | const char *p; |
1e9fa730 NF |
795 | uint32_t thread; |
796 | int ch, reg_size, type, res; | |
56aebc89 PB |
797 | char buf[MAX_PACKET_LENGTH]; |
798 | uint8_t mem_buf[MAX_PACKET_LENGTH]; | |
799 | uint8_t *registers; | |
9d9754a3 | 800 | target_ulong addr, len; |
3b46e624 | 801 | |
858693c6 FB |
802 | #ifdef DEBUG_GDB |
803 | printf("command='%s'\n", line_buf); | |
804 | #endif | |
805 | p = line_buf; | |
806 | ch = *p++; | |
807 | switch(ch) { | |
808 | case '?': | |
1fddef4b | 809 | /* TODO: Make this return the correct value for user-mode. */ |
ca587a8e | 810 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", GDB_SIGNAL_TRAP, |
2e0f2cfb | 811 | cpu_index(s->c_cpu)); |
858693c6 | 812 | put_packet(s, buf); |
7d03f82f EI |
813 | /* Remove all the breakpoints when this query is issued, |
814 | * because gdb is doing and initial connect and the state | |
815 | * should be cleaned up. | |
816 | */ | |
880a7578 | 817 | gdb_breakpoint_remove_all(); |
858693c6 FB |
818 | break; |
819 | case 'c': | |
820 | if (*p != '\0') { | |
9d9754a3 | 821 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 822 | gdb_set_cpu_pc(s, addr); |
858693c6 | 823 | } |
ca587a8e | 824 | s->signal = 0; |
ba70a624 | 825 | gdb_continue(s); |
41625033 | 826 | return RS_IDLE; |
1f487ee9 | 827 | case 'C': |
ca587a8e AJ |
828 | s->signal = gdb_signal_to_target (strtoul(p, (char **)&p, 16)); |
829 | if (s->signal == -1) | |
830 | s->signal = 0; | |
1f487ee9 EI |
831 | gdb_continue(s); |
832 | return RS_IDLE; | |
dd32aa10 JK |
833 | case 'v': |
834 | if (strncmp(p, "Cont", 4) == 0) { | |
835 | int res_signal, res_thread; | |
836 | ||
837 | p += 4; | |
838 | if (*p == '?') { | |
839 | put_packet(s, "vCont;c;C;s;S"); | |
840 | break; | |
841 | } | |
842 | res = 0; | |
843 | res_signal = 0; | |
844 | res_thread = 0; | |
845 | while (*p) { | |
846 | int action, signal; | |
847 | ||
848 | if (*p++ != ';') { | |
849 | res = 0; | |
850 | break; | |
851 | } | |
852 | action = *p++; | |
853 | signal = 0; | |
854 | if (action == 'C' || action == 'S') { | |
f17b0690 MS |
855 | signal = gdb_signal_to_target(strtoul(p, (char **)&p, 16)); |
856 | if (signal == -1) { | |
857 | signal = 0; | |
858 | } | |
dd32aa10 JK |
859 | } else if (action != 'c' && action != 's') { |
860 | res = 0; | |
861 | break; | |
862 | } | |
863 | thread = 0; | |
864 | if (*p == ':') { | |
865 | thread = strtoull(p+1, (char **)&p, 16); | |
866 | } | |
867 | action = tolower(action); | |
868 | if (res == 0 || (res == 'c' && action == 's')) { | |
869 | res = action; | |
870 | res_signal = signal; | |
871 | res_thread = thread; | |
872 | } | |
873 | } | |
874 | if (res) { | |
875 | if (res_thread != -1 && res_thread != 0) { | |
2e0f2cfb AF |
876 | cpu = find_cpu(res_thread); |
877 | if (cpu == NULL) { | |
dd32aa10 JK |
878 | put_packet(s, "E22"); |
879 | break; | |
880 | } | |
2e0f2cfb | 881 | s->c_cpu = cpu; |
dd32aa10 JK |
882 | } |
883 | if (res == 's') { | |
2e0f2cfb | 884 | cpu_single_step(s->c_cpu, sstep_flags); |
dd32aa10 JK |
885 | } |
886 | s->signal = res_signal; | |
887 | gdb_continue(s); | |
888 | return RS_IDLE; | |
889 | } | |
890 | break; | |
891 | } else { | |
892 | goto unknown_command; | |
893 | } | |
7d03f82f EI |
894 | case 'k': |
895 | /* Kill the target */ | |
896 | fprintf(stderr, "\nQEMU: Terminated via GDBstub\n"); | |
897 | exit(0); | |
898 | case 'D': | |
899 | /* Detach packet */ | |
880a7578 | 900 | gdb_breakpoint_remove_all(); |
7ea06da3 | 901 | gdb_syscall_mode = GDB_SYS_DISABLED; |
7d03f82f EI |
902 | gdb_continue(s); |
903 | put_packet(s, "OK"); | |
904 | break; | |
858693c6 FB |
905 | case 's': |
906 | if (*p != '\0') { | |
8fac5803 | 907 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 908 | gdb_set_cpu_pc(s, addr); |
858693c6 | 909 | } |
2e0f2cfb | 910 | cpu_single_step(s->c_cpu, sstep_flags); |
ba70a624 | 911 | gdb_continue(s); |
41625033 | 912 | return RS_IDLE; |
a2d1ebaf PB |
913 | case 'F': |
914 | { | |
915 | target_ulong ret; | |
916 | target_ulong err; | |
917 | ||
918 | ret = strtoull(p, (char **)&p, 16); | |
919 | if (*p == ',') { | |
920 | p++; | |
921 | err = strtoull(p, (char **)&p, 16); | |
922 | } else { | |
923 | err = 0; | |
924 | } | |
925 | if (*p == ',') | |
926 | p++; | |
927 | type = *p; | |
cdb432b2 | 928 | if (s->current_syscall_cb) { |
2e0f2cfb | 929 | s->current_syscall_cb(s->c_cpu, ret, err); |
cdb432b2 MI |
930 | s->current_syscall_cb = NULL; |
931 | } | |
a2d1ebaf PB |
932 | if (type == 'C') { |
933 | put_packet(s, "T02"); | |
934 | } else { | |
ba70a624 | 935 | gdb_continue(s); |
a2d1ebaf PB |
936 | } |
937 | } | |
938 | break; | |
858693c6 | 939 | case 'g': |
2e0f2cfb | 940 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 941 | len = 0; |
35143f01 | 942 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs; addr++) { |
2e0f2cfb | 943 | reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr); |
56aebc89 PB |
944 | len += reg_size; |
945 | } | |
946 | memtohex(buf, mem_buf, len); | |
858693c6 FB |
947 | put_packet(s, buf); |
948 | break; | |
949 | case 'G': | |
2e0f2cfb | 950 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 951 | registers = mem_buf; |
858693c6 FB |
952 | len = strlen(p) / 2; |
953 | hextomem((uint8_t *)registers, p, len); | |
35143f01 | 954 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs && len > 0; addr++) { |
2e0f2cfb | 955 | reg_size = gdb_write_register(s->g_cpu, registers, addr); |
56aebc89 PB |
956 | len -= reg_size; |
957 | registers += reg_size; | |
958 | } | |
858693c6 FB |
959 | put_packet(s, "OK"); |
960 | break; | |
961 | case 'm': | |
9d9754a3 | 962 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
963 | if (*p == ',') |
964 | p++; | |
9d9754a3 | 965 | len = strtoull(p, NULL, 16); |
5accecb3 KW |
966 | |
967 | /* memtohex() doubles the required space */ | |
968 | if (len > MAX_PACKET_LENGTH / 2) { | |
969 | put_packet (s, "E22"); | |
970 | break; | |
971 | } | |
972 | ||
2e0f2cfb | 973 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, false) != 0) { |
6f970bd9 FB |
974 | put_packet (s, "E14"); |
975 | } else { | |
976 | memtohex(buf, mem_buf, len); | |
977 | put_packet(s, buf); | |
978 | } | |
858693c6 FB |
979 | break; |
980 | case 'M': | |
9d9754a3 | 981 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
982 | if (*p == ',') |
983 | p++; | |
9d9754a3 | 984 | len = strtoull(p, (char **)&p, 16); |
b328f873 | 985 | if (*p == ':') |
858693c6 | 986 | p++; |
5accecb3 KW |
987 | |
988 | /* hextomem() reads 2*len bytes */ | |
989 | if (len > strlen(p) / 2) { | |
990 | put_packet (s, "E22"); | |
991 | break; | |
992 | } | |
858693c6 | 993 | hextomem(mem_buf, p, len); |
2e0f2cfb | 994 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, |
f3659eee | 995 | true) != 0) { |
905f20b1 | 996 | put_packet(s, "E14"); |
44520db1 | 997 | } else { |
858693c6 | 998 | put_packet(s, "OK"); |
44520db1 | 999 | } |
858693c6 | 1000 | break; |
56aebc89 PB |
1001 | case 'p': |
1002 | /* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable. | |
1003 | This works, but can be very slow. Anything new enough to | |
1004 | understand XML also knows how to use this properly. */ | |
1005 | if (!gdb_has_xml) | |
1006 | goto unknown_command; | |
1007 | addr = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 1008 | reg_size = gdb_read_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1009 | if (reg_size) { |
1010 | memtohex(buf, mem_buf, reg_size); | |
1011 | put_packet(s, buf); | |
1012 | } else { | |
1013 | put_packet(s, "E14"); | |
1014 | } | |
1015 | break; | |
1016 | case 'P': | |
1017 | if (!gdb_has_xml) | |
1018 | goto unknown_command; | |
1019 | addr = strtoull(p, (char **)&p, 16); | |
1020 | if (*p == '=') | |
1021 | p++; | |
1022 | reg_size = strlen(p) / 2; | |
1023 | hextomem(mem_buf, p, reg_size); | |
2e0f2cfb | 1024 | gdb_write_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1025 | put_packet(s, "OK"); |
1026 | break; | |
858693c6 | 1027 | case 'Z': |
858693c6 FB |
1028 | case 'z': |
1029 | type = strtoul(p, (char **)&p, 16); | |
1030 | if (*p == ',') | |
1031 | p++; | |
9d9754a3 | 1032 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1033 | if (*p == ',') |
1034 | p++; | |
9d9754a3 | 1035 | len = strtoull(p, (char **)&p, 16); |
a1d1bb31 | 1036 | if (ch == 'Z') |
880a7578 | 1037 | res = gdb_breakpoint_insert(addr, len, type); |
a1d1bb31 | 1038 | else |
880a7578 | 1039 | res = gdb_breakpoint_remove(addr, len, type); |
a1d1bb31 AL |
1040 | if (res >= 0) |
1041 | put_packet(s, "OK"); | |
1042 | else if (res == -ENOSYS) | |
0f459d16 | 1043 | put_packet(s, ""); |
a1d1bb31 AL |
1044 | else |
1045 | put_packet(s, "E22"); | |
858693c6 | 1046 | break; |
880a7578 AL |
1047 | case 'H': |
1048 | type = *p++; | |
1049 | thread = strtoull(p, (char **)&p, 16); | |
1050 | if (thread == -1 || thread == 0) { | |
1051 | put_packet(s, "OK"); | |
1052 | break; | |
1053 | } | |
2e0f2cfb AF |
1054 | cpu = find_cpu(thread); |
1055 | if (cpu == NULL) { | |
880a7578 AL |
1056 | put_packet(s, "E22"); |
1057 | break; | |
1058 | } | |
1059 | switch (type) { | |
1060 | case 'c': | |
2e0f2cfb | 1061 | s->c_cpu = cpu; |
880a7578 AL |
1062 | put_packet(s, "OK"); |
1063 | break; | |
1064 | case 'g': | |
2e0f2cfb | 1065 | s->g_cpu = cpu; |
880a7578 AL |
1066 | put_packet(s, "OK"); |
1067 | break; | |
1068 | default: | |
1069 | put_packet(s, "E22"); | |
1070 | break; | |
1071 | } | |
1072 | break; | |
1073 | case 'T': | |
1074 | thread = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 1075 | cpu = find_cpu(thread); |
1e9fa730 | 1076 | |
2e0f2cfb | 1077 | if (cpu != NULL) { |
1e9fa730 NF |
1078 | put_packet(s, "OK"); |
1079 | } else { | |
880a7578 | 1080 | put_packet(s, "E22"); |
1e9fa730 | 1081 | } |
880a7578 | 1082 | break; |
978efd6a | 1083 | case 'q': |
60897d36 EI |
1084 | case 'Q': |
1085 | /* parse any 'q' packets here */ | |
1086 | if (!strcmp(p,"qemu.sstepbits")) { | |
1087 | /* Query Breakpoint bit definitions */ | |
363a37d5 BS |
1088 | snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
1089 | SSTEP_ENABLE, | |
1090 | SSTEP_NOIRQ, | |
1091 | SSTEP_NOTIMER); | |
60897d36 EI |
1092 | put_packet(s, buf); |
1093 | break; | |
4dabe747 | 1094 | } else if (is_query_packet(p, "qemu.sstep", '=')) { |
60897d36 EI |
1095 | /* Display or change the sstep_flags */ |
1096 | p += 10; | |
1097 | if (*p != '=') { | |
1098 | /* Display current setting */ | |
363a37d5 | 1099 | snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
60897d36 EI |
1100 | put_packet(s, buf); |
1101 | break; | |
1102 | } | |
1103 | p++; | |
1104 | type = strtoul(p, (char **)&p, 16); | |
1105 | sstep_flags = type; | |
1106 | put_packet(s, "OK"); | |
1107 | break; | |
880a7578 AL |
1108 | } else if (strcmp(p,"C") == 0) { |
1109 | /* "Current thread" remains vague in the spec, so always return | |
1110 | * the first CPU (gdb returns the first thread). */ | |
1111 | put_packet(s, "QC1"); | |
1112 | break; | |
1113 | } else if (strcmp(p,"fThreadInfo") == 0) { | |
52f34623 | 1114 | s->query_cpu = first_cpu; |
880a7578 AL |
1115 | goto report_cpuinfo; |
1116 | } else if (strcmp(p,"sThreadInfo") == 0) { | |
1117 | report_cpuinfo: | |
1118 | if (s->query_cpu) { | |
52f34623 | 1119 | snprintf(buf, sizeof(buf), "m%x", cpu_index(s->query_cpu)); |
880a7578 | 1120 | put_packet(s, buf); |
bdc44640 | 1121 | s->query_cpu = CPU_NEXT(s->query_cpu); |
880a7578 AL |
1122 | } else |
1123 | put_packet(s, "l"); | |
1124 | break; | |
1125 | } else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) { | |
1126 | thread = strtoull(p+16, (char **)&p, 16); | |
2e0f2cfb AF |
1127 | cpu = find_cpu(thread); |
1128 | if (cpu != NULL) { | |
cb446eca | 1129 | cpu_synchronize_state(cpu); |
5accecb3 KW |
1130 | /* memtohex() doubles the required space */ |
1131 | len = snprintf((char *)mem_buf, sizeof(buf) / 2, | |
55e5c285 | 1132 | "CPU#%d [%s]", cpu->cpu_index, |
259186a7 | 1133 | cpu->halted ? "halted " : "running"); |
1e9fa730 NF |
1134 | memtohex(buf, mem_buf, len); |
1135 | put_packet(s, buf); | |
1136 | } | |
880a7578 | 1137 | break; |
60897d36 | 1138 | } |
0b8a988c | 1139 | #ifdef CONFIG_USER_ONLY |
070949f3 | 1140 | else if (strcmp(p, "Offsets") == 0) { |
0429a971 | 1141 | TaskState *ts = s->c_cpu->opaque; |
978efd6a | 1142 | |
363a37d5 BS |
1143 | snprintf(buf, sizeof(buf), |
1144 | "Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx | |
1145 | ";Bss=" TARGET_ABI_FMT_lx, | |
1146 | ts->info->code_offset, | |
1147 | ts->info->data_offset, | |
1148 | ts->info->data_offset); | |
978efd6a PB |
1149 | put_packet(s, buf); |
1150 | break; | |
1151 | } | |
0b8a988c | 1152 | #else /* !CONFIG_USER_ONLY */ |
8a34a0fb AL |
1153 | else if (strncmp(p, "Rcmd,", 5) == 0) { |
1154 | int len = strlen(p + 5); | |
1155 | ||
1156 | if ((len % 2) != 0) { | |
1157 | put_packet(s, "E01"); | |
1158 | break; | |
1159 | } | |
8a34a0fb | 1160 | len = len / 2; |
5accecb3 | 1161 | hextomem(mem_buf, p + 5, len); |
8a34a0fb | 1162 | mem_buf[len++] = 0; |
fa5efccb | 1163 | qemu_chr_be_write(s->mon_chr, mem_buf, len); |
8a34a0fb AL |
1164 | put_packet(s, "OK"); |
1165 | break; | |
1166 | } | |
0b8a988c | 1167 | #endif /* !CONFIG_USER_ONLY */ |
4dabe747 | 1168 | if (is_query_packet(p, "Supported", ':')) { |
5b3715bf | 1169 | snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
5b24c641 AF |
1170 | cc = CPU_GET_CLASS(first_cpu); |
1171 | if (cc->gdb_core_xml_file != NULL) { | |
1172 | pstrcat(buf, sizeof(buf), ";qXfer:features:read+"); | |
1173 | } | |
56aebc89 PB |
1174 | put_packet(s, buf); |
1175 | break; | |
1176 | } | |
56aebc89 PB |
1177 | if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
1178 | const char *xml; | |
1179 | target_ulong total_len; | |
1180 | ||
5b24c641 AF |
1181 | cc = CPU_GET_CLASS(first_cpu); |
1182 | if (cc->gdb_core_xml_file == NULL) { | |
1183 | goto unknown_command; | |
1184 | } | |
1185 | ||
5b50e790 | 1186 | gdb_has_xml = true; |
56aebc89 | 1187 | p += 19; |
5b24c641 | 1188 | xml = get_feature_xml(p, &p, cc); |
56aebc89 | 1189 | if (!xml) { |
5b3715bf | 1190 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1191 | put_packet(s, buf); |
1192 | break; | |
1193 | } | |
1194 | ||
1195 | if (*p == ':') | |
1196 | p++; | |
1197 | addr = strtoul(p, (char **)&p, 16); | |
1198 | if (*p == ',') | |
1199 | p++; | |
1200 | len = strtoul(p, (char **)&p, 16); | |
1201 | ||
1202 | total_len = strlen(xml); | |
1203 | if (addr > total_len) { | |
5b3715bf | 1204 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1205 | put_packet(s, buf); |
1206 | break; | |
1207 | } | |
1208 | if (len > (MAX_PACKET_LENGTH - 5) / 2) | |
1209 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
1210 | if (len < total_len - addr) { | |
1211 | buf[0] = 'm'; | |
1212 | len = memtox(buf + 1, xml + addr, len); | |
1213 | } else { | |
1214 | buf[0] = 'l'; | |
1215 | len = memtox(buf + 1, xml + addr, total_len - addr); | |
1216 | } | |
1217 | put_packet_binary(s, buf, len + 1); | |
1218 | break; | |
1219 | } | |
a3919386 JK |
1220 | if (is_query_packet(p, "Attached", ':')) { |
1221 | put_packet(s, GDB_ATTACHED); | |
1222 | break; | |
1223 | } | |
56aebc89 PB |
1224 | /* Unrecognised 'q' command. */ |
1225 | goto unknown_command; | |
1226 | ||
858693c6 | 1227 | default: |
56aebc89 | 1228 | unknown_command: |
858693c6 FB |
1229 | /* put empty packet */ |
1230 | buf[0] = '\0'; | |
1231 | put_packet(s, buf); | |
1232 | break; | |
1233 | } | |
1234 | return RS_IDLE; | |
1235 | } | |
1236 | ||
64f6b346 | 1237 | void gdb_set_stop_cpu(CPUState *cpu) |
880a7578 | 1238 | { |
2e0f2cfb AF |
1239 | gdbserver_state->c_cpu = cpu; |
1240 | gdbserver_state->g_cpu = cpu; | |
880a7578 AL |
1241 | } |
1242 | ||
1fddef4b | 1243 | #ifndef CONFIG_USER_ONLY |
1dfb4dd9 | 1244 | static void gdb_vm_state_change(void *opaque, int running, RunState state) |
858693c6 | 1245 | { |
880a7578 | 1246 | GDBState *s = gdbserver_state; |
2e0f2cfb | 1247 | CPUState *cpu = s->c_cpu; |
858693c6 | 1248 | char buf[256]; |
d6fc1b39 | 1249 | const char *type; |
858693c6 FB |
1250 | int ret; |
1251 | ||
cdb432b2 MI |
1252 | if (running || s->state == RS_INACTIVE) { |
1253 | return; | |
1254 | } | |
1255 | /* Is there a GDB syscall waiting to be sent? */ | |
1256 | if (s->current_syscall_cb) { | |
1257 | put_packet(s, s->syscall_buf); | |
a2d1ebaf | 1258 | return; |
e07bbac5 | 1259 | } |
1dfb4dd9 | 1260 | switch (state) { |
0461d5a6 | 1261 | case RUN_STATE_DEBUG: |
ff4700b0 AF |
1262 | if (cpu->watchpoint_hit) { |
1263 | switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) { | |
a1d1bb31 | 1264 | case BP_MEM_READ: |
d6fc1b39 AL |
1265 | type = "r"; |
1266 | break; | |
a1d1bb31 | 1267 | case BP_MEM_ACCESS: |
d6fc1b39 AL |
1268 | type = "a"; |
1269 | break; | |
1270 | default: | |
1271 | type = ""; | |
1272 | break; | |
1273 | } | |
880a7578 AL |
1274 | snprintf(buf, sizeof(buf), |
1275 | "T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";", | |
0d34282f | 1276 | GDB_SIGNAL_TRAP, cpu_index(cpu), type, |
ff4700b0 AF |
1277 | (target_ulong)cpu->watchpoint_hit->vaddr); |
1278 | cpu->watchpoint_hit = NULL; | |
425189a8 | 1279 | goto send_packet; |
6658ffb8 | 1280 | } |
bbd77c18 | 1281 | tb_flush(cpu); |
ca587a8e | 1282 | ret = GDB_SIGNAL_TRAP; |
425189a8 | 1283 | break; |
0461d5a6 | 1284 | case RUN_STATE_PAUSED: |
9781e040 | 1285 | ret = GDB_SIGNAL_INT; |
425189a8 | 1286 | break; |
0461d5a6 | 1287 | case RUN_STATE_SHUTDOWN: |
425189a8 JK |
1288 | ret = GDB_SIGNAL_QUIT; |
1289 | break; | |
0461d5a6 | 1290 | case RUN_STATE_IO_ERROR: |
425189a8 JK |
1291 | ret = GDB_SIGNAL_IO; |
1292 | break; | |
0461d5a6 | 1293 | case RUN_STATE_WATCHDOG: |
425189a8 JK |
1294 | ret = GDB_SIGNAL_ALRM; |
1295 | break; | |
0461d5a6 | 1296 | case RUN_STATE_INTERNAL_ERROR: |
425189a8 JK |
1297 | ret = GDB_SIGNAL_ABRT; |
1298 | break; | |
0461d5a6 LC |
1299 | case RUN_STATE_SAVE_VM: |
1300 | case RUN_STATE_RESTORE_VM: | |
425189a8 | 1301 | return; |
0461d5a6 | 1302 | case RUN_STATE_FINISH_MIGRATE: |
425189a8 JK |
1303 | ret = GDB_SIGNAL_XCPU; |
1304 | break; | |
1305 | default: | |
1306 | ret = GDB_SIGNAL_UNKNOWN; | |
1307 | break; | |
bbeb7b5c | 1308 | } |
226d007d | 1309 | gdb_set_stop_cpu(cpu); |
0d34282f | 1310 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, cpu_index(cpu)); |
425189a8 JK |
1311 | |
1312 | send_packet: | |
858693c6 | 1313 | put_packet(s, buf); |
425189a8 JK |
1314 | |
1315 | /* disable single step if it was enabled */ | |
3825b28f | 1316 | cpu_single_step(cpu, 0); |
858693c6 | 1317 | } |
1fddef4b | 1318 | #endif |
858693c6 | 1319 | |
a2d1ebaf PB |
1320 | /* Send a gdb syscall request. |
1321 | This accepts limited printf-style format specifiers, specifically: | |
a87295e8 PB |
1322 | %x - target_ulong argument printed in hex. |
1323 | %lx - 64-bit argument printed in hex. | |
1324 | %s - string pointer (target_ulong) and length (int) pair. */ | |
19239b39 | 1325 | void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va) |
a2d1ebaf | 1326 | { |
a2d1ebaf | 1327 | char *p; |
cdb432b2 | 1328 | char *p_end; |
a2d1ebaf | 1329 | target_ulong addr; |
a87295e8 | 1330 | uint64_t i64; |
a2d1ebaf PB |
1331 | GDBState *s; |
1332 | ||
880a7578 | 1333 | s = gdbserver_state; |
a2d1ebaf PB |
1334 | if (!s) |
1335 | return; | |
cdb432b2 | 1336 | s->current_syscall_cb = cb; |
a2d1ebaf | 1337 | #ifndef CONFIG_USER_ONLY |
0461d5a6 | 1338 | vm_stop(RUN_STATE_DEBUG); |
a2d1ebaf | 1339 | #endif |
cdb432b2 MI |
1340 | p = s->syscall_buf; |
1341 | p_end = &s->syscall_buf[sizeof(s->syscall_buf)]; | |
a2d1ebaf PB |
1342 | *(p++) = 'F'; |
1343 | while (*fmt) { | |
1344 | if (*fmt == '%') { | |
1345 | fmt++; | |
1346 | switch (*fmt++) { | |
1347 | case 'x': | |
1348 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1349 | p += snprintf(p, p_end - p, TARGET_FMT_lx, addr); |
a2d1ebaf | 1350 | break; |
a87295e8 PB |
1351 | case 'l': |
1352 | if (*(fmt++) != 'x') | |
1353 | goto bad_format; | |
1354 | i64 = va_arg(va, uint64_t); | |
cdb432b2 | 1355 | p += snprintf(p, p_end - p, "%" PRIx64, i64); |
a87295e8 | 1356 | break; |
a2d1ebaf PB |
1357 | case 's': |
1358 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1359 | p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x", |
363a37d5 | 1360 | addr, va_arg(va, int)); |
a2d1ebaf PB |
1361 | break; |
1362 | default: | |
a87295e8 | 1363 | bad_format: |
a2d1ebaf PB |
1364 | fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n", |
1365 | fmt - 1); | |
1366 | break; | |
1367 | } | |
1368 | } else { | |
1369 | *(p++) = *(fmt++); | |
1370 | } | |
1371 | } | |
8a93e02a | 1372 | *p = 0; |
a2d1ebaf | 1373 | #ifdef CONFIG_USER_ONLY |
cdb432b2 | 1374 | put_packet(s, s->syscall_buf); |
2e0f2cfb | 1375 | gdb_handlesig(s->c_cpu, 0); |
a2d1ebaf | 1376 | #else |
cdb432b2 MI |
1377 | /* In this case wait to send the syscall packet until notification that |
1378 | the CPU has stopped. This must be done because if the packet is sent | |
1379 | now the reply from the syscall request could be received while the CPU | |
1380 | is still in the running state, which can cause packets to be dropped | |
1381 | and state transition 'T' packets to be sent while the syscall is still | |
1382 | being processed. */ | |
9102deda | 1383 | qemu_cpu_kick(s->c_cpu); |
a2d1ebaf PB |
1384 | #endif |
1385 | } | |
1386 | ||
19239b39 PM |
1387 | void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
1388 | { | |
1389 | va_list va; | |
1390 | ||
1391 | va_start(va, fmt); | |
1392 | gdb_do_syscallv(cb, fmt, va); | |
1393 | va_end(va); | |
1394 | } | |
1395 | ||
6a00d601 | 1396 | static void gdb_read_byte(GDBState *s, int ch) |
858693c6 FB |
1397 | { |
1398 | int i, csum; | |
60fe76f3 | 1399 | uint8_t reply; |
858693c6 | 1400 | |
1fddef4b | 1401 | #ifndef CONFIG_USER_ONLY |
4046d913 PB |
1402 | if (s->last_packet_len) { |
1403 | /* Waiting for a response to the last packet. If we see the start | |
1404 | of a new command then abandon the previous response. */ | |
1405 | if (ch == '-') { | |
1406 | #ifdef DEBUG_GDB | |
1407 | printf("Got NACK, retransmitting\n"); | |
1408 | #endif | |
ffe8ab83 | 1409 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
4046d913 PB |
1410 | } |
1411 | #ifdef DEBUG_GDB | |
1412 | else if (ch == '+') | |
1413 | printf("Got ACK\n"); | |
1414 | else | |
1415 | printf("Got '%c' when expecting ACK/NACK\n", ch); | |
1416 | #endif | |
1417 | if (ch == '+' || ch == '$') | |
1418 | s->last_packet_len = 0; | |
1419 | if (ch != '$') | |
1420 | return; | |
1421 | } | |
1354869c | 1422 | if (runstate_is_running()) { |
858693c6 FB |
1423 | /* when the CPU is running, we cannot do anything except stop |
1424 | it when receiving a char */ | |
0461d5a6 | 1425 | vm_stop(RUN_STATE_PAUSED); |
5fafdf24 | 1426 | } else |
1fddef4b | 1427 | #endif |
41625033 | 1428 | { |
858693c6 FB |
1429 | switch(s->state) { |
1430 | case RS_IDLE: | |
1431 | if (ch == '$') { | |
1432 | s->line_buf_index = 0; | |
1433 | s->state = RS_GETLINE; | |
c33a346e | 1434 | } |
b4608c04 | 1435 | break; |
858693c6 FB |
1436 | case RS_GETLINE: |
1437 | if (ch == '#') { | |
1438 | s->state = RS_CHKSUM1; | |
1439 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { | |
1440 | s->state = RS_IDLE; | |
4c3a88a2 | 1441 | } else { |
858693c6 | 1442 | s->line_buf[s->line_buf_index++] = ch; |
4c3a88a2 FB |
1443 | } |
1444 | break; | |
858693c6 FB |
1445 | case RS_CHKSUM1: |
1446 | s->line_buf[s->line_buf_index] = '\0'; | |
1447 | s->line_csum = fromhex(ch) << 4; | |
1448 | s->state = RS_CHKSUM2; | |
1449 | break; | |
1450 | case RS_CHKSUM2: | |
1451 | s->line_csum |= fromhex(ch); | |
1452 | csum = 0; | |
1453 | for(i = 0; i < s->line_buf_index; i++) { | |
1454 | csum += s->line_buf[i]; | |
1455 | } | |
1456 | if (s->line_csum != (csum & 0xff)) { | |
60fe76f3 TS |
1457 | reply = '-'; |
1458 | put_buffer(s, &reply, 1); | |
858693c6 | 1459 | s->state = RS_IDLE; |
4c3a88a2 | 1460 | } else { |
60fe76f3 TS |
1461 | reply = '+'; |
1462 | put_buffer(s, &reply, 1); | |
880a7578 | 1463 | s->state = gdb_handle_packet(s, s->line_buf); |
4c3a88a2 FB |
1464 | } |
1465 | break; | |
a2d1ebaf PB |
1466 | default: |
1467 | abort(); | |
858693c6 FB |
1468 | } |
1469 | } | |
1470 | } | |
1471 | ||
0e1c9c54 | 1472 | /* Tell the remote gdb that the process has exited. */ |
9349b4f9 | 1473 | void gdb_exit(CPUArchState *env, int code) |
0e1c9c54 PB |
1474 | { |
1475 | GDBState *s; | |
1476 | char buf[4]; | |
1477 | ||
1478 | s = gdbserver_state; | |
1479 | if (!s) { | |
1480 | return; | |
1481 | } | |
1482 | #ifdef CONFIG_USER_ONLY | |
1483 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1484 | return; | |
1485 | } | |
3d0f4418 PB |
1486 | #else |
1487 | if (!s->chr) { | |
1488 | return; | |
1489 | } | |
0e1c9c54 PB |
1490 | #endif |
1491 | ||
1492 | snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code); | |
1493 | put_packet(s, buf); | |
e2af15b2 FC |
1494 | |
1495 | #ifndef CONFIG_USER_ONLY | |
3d0f4418 | 1496 | qemu_chr_delete(s->chr); |
e2af15b2 | 1497 | #endif |
0e1c9c54 PB |
1498 | } |
1499 | ||
1fddef4b | 1500 | #ifdef CONFIG_USER_ONLY |
ca587a8e AJ |
1501 | int |
1502 | gdb_queuesig (void) | |
1503 | { | |
1504 | GDBState *s; | |
1505 | ||
1506 | s = gdbserver_state; | |
1507 | ||
1508 | if (gdbserver_fd < 0 || s->fd < 0) | |
1509 | return 0; | |
1510 | else | |
1511 | return 1; | |
1512 | } | |
1513 | ||
1fddef4b | 1514 | int |
db6b81d4 | 1515 | gdb_handlesig(CPUState *cpu, int sig) |
1fddef4b | 1516 | { |
5ca666c7 AF |
1517 | GDBState *s; |
1518 | char buf[256]; | |
1519 | int n; | |
1fddef4b | 1520 | |
5ca666c7 AF |
1521 | s = gdbserver_state; |
1522 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1523 | return sig; | |
1524 | } | |
1fddef4b | 1525 | |
5ca666c7 | 1526 | /* disable single step if it was enabled */ |
3825b28f | 1527 | cpu_single_step(cpu, 0); |
bbd77c18 | 1528 | tb_flush(cpu); |
1fddef4b | 1529 | |
5ca666c7 AF |
1530 | if (sig != 0) { |
1531 | snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); | |
1532 | put_packet(s, buf); | |
1533 | } | |
1534 | /* put_packet() might have detected that the peer terminated the | |
1535 | connection. */ | |
1536 | if (s->fd < 0) { | |
1537 | return sig; | |
1538 | } | |
1fddef4b | 1539 | |
5ca666c7 AF |
1540 | sig = 0; |
1541 | s->state = RS_IDLE; | |
1542 | s->running_state = 0; | |
1543 | while (s->running_state == 0) { | |
1544 | n = read(s->fd, buf, 256); | |
1545 | if (n > 0) { | |
1546 | int i; | |
1547 | ||
1548 | for (i = 0; i < n; i++) { | |
1549 | gdb_read_byte(s, buf[i]); | |
1550 | } | |
1551 | } else if (n == 0 || errno != EAGAIN) { | |
1552 | /* XXX: Connection closed. Should probably wait for another | |
1553 | connection before continuing. */ | |
1554 | return sig; | |
1fddef4b | 1555 | } |
5ca666c7 AF |
1556 | } |
1557 | sig = s->signal; | |
1558 | s->signal = 0; | |
1559 | return sig; | |
1fddef4b | 1560 | } |
e9009676 | 1561 | |
ca587a8e | 1562 | /* Tell the remote gdb that the process has exited due to SIG. */ |
9349b4f9 | 1563 | void gdb_signalled(CPUArchState *env, int sig) |
ca587a8e | 1564 | { |
5ca666c7 AF |
1565 | GDBState *s; |
1566 | char buf[4]; | |
ca587a8e | 1567 | |
5ca666c7 AF |
1568 | s = gdbserver_state; |
1569 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1570 | return; | |
1571 | } | |
ca587a8e | 1572 | |
5ca666c7 AF |
1573 | snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig)); |
1574 | put_packet(s, buf); | |
ca587a8e | 1575 | } |
1fddef4b | 1576 | |
880a7578 | 1577 | static void gdb_accept(void) |
858693c6 FB |
1578 | { |
1579 | GDBState *s; | |
1580 | struct sockaddr_in sockaddr; | |
1581 | socklen_t len; | |
bf1c852a | 1582 | int fd; |
858693c6 FB |
1583 | |
1584 | for(;;) { | |
1585 | len = sizeof(sockaddr); | |
1586 | fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len); | |
1587 | if (fd < 0 && errno != EINTR) { | |
1588 | perror("accept"); | |
1589 | return; | |
1590 | } else if (fd >= 0) { | |
40ff6d7e KW |
1591 | #ifndef _WIN32 |
1592 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
1593 | #endif | |
b4608c04 FB |
1594 | break; |
1595 | } | |
1596 | } | |
858693c6 FB |
1597 | |
1598 | /* set short latency */ | |
bf1c852a | 1599 | socket_set_nodelay(fd); |
3b46e624 | 1600 | |
7267c094 | 1601 | s = g_malloc0(sizeof(GDBState)); |
2e0f2cfb AF |
1602 | s->c_cpu = first_cpu; |
1603 | s->g_cpu = first_cpu; | |
858693c6 | 1604 | s->fd = fd; |
5b50e790 | 1605 | gdb_has_xml = false; |
858693c6 | 1606 | |
880a7578 | 1607 | gdbserver_state = s; |
a2d1ebaf | 1608 | |
858693c6 | 1609 | fcntl(fd, F_SETFL, O_NONBLOCK); |
858693c6 FB |
1610 | } |
1611 | ||
1612 | static int gdbserver_open(int port) | |
1613 | { | |
1614 | struct sockaddr_in sockaddr; | |
6669ca13 | 1615 | int fd, ret; |
858693c6 FB |
1616 | |
1617 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
1618 | if (fd < 0) { | |
1619 | perror("socket"); | |
1620 | return -1; | |
1621 | } | |
40ff6d7e KW |
1622 | #ifndef _WIN32 |
1623 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
1624 | #endif | |
858693c6 | 1625 | |
6669ca13 | 1626 | socket_set_fast_reuse(fd); |
858693c6 FB |
1627 | |
1628 | sockaddr.sin_family = AF_INET; | |
1629 | sockaddr.sin_port = htons(port); | |
1630 | sockaddr.sin_addr.s_addr = 0; | |
1631 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
1632 | if (ret < 0) { | |
1633 | perror("bind"); | |
bb16172c | 1634 | close(fd); |
858693c6 FB |
1635 | return -1; |
1636 | } | |
1637 | ret = listen(fd, 0); | |
1638 | if (ret < 0) { | |
1639 | perror("listen"); | |
bb16172c | 1640 | close(fd); |
858693c6 FB |
1641 | return -1; |
1642 | } | |
858693c6 FB |
1643 | return fd; |
1644 | } | |
1645 | ||
1646 | int gdbserver_start(int port) | |
1647 | { | |
1648 | gdbserver_fd = gdbserver_open(port); | |
1649 | if (gdbserver_fd < 0) | |
1650 | return -1; | |
1651 | /* accept connections */ | |
880a7578 | 1652 | gdb_accept(); |
4046d913 PB |
1653 | return 0; |
1654 | } | |
2b1319c8 AJ |
1655 | |
1656 | /* Disable gdb stub for child processes. */ | |
f7ec7f7b | 1657 | void gdbserver_fork(CPUState *cpu) |
2b1319c8 AJ |
1658 | { |
1659 | GDBState *s = gdbserver_state; | |
75a34036 AF |
1660 | |
1661 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1662 | return; | |
1663 | } | |
2b1319c8 AJ |
1664 | close(s->fd); |
1665 | s->fd = -1; | |
b3310ab3 | 1666 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
75a34036 | 1667 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
2b1319c8 | 1668 | } |
1fddef4b | 1669 | #else |
aa1f17c1 | 1670 | static int gdb_chr_can_receive(void *opaque) |
4046d913 | 1671 | { |
56aebc89 PB |
1672 | /* We can handle an arbitrarily large amount of data. |
1673 | Pick the maximum packet size, which is as good as anything. */ | |
1674 | return MAX_PACKET_LENGTH; | |
4046d913 PB |
1675 | } |
1676 | ||
aa1f17c1 | 1677 | static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
4046d913 | 1678 | { |
4046d913 PB |
1679 | int i; |
1680 | ||
1681 | for (i = 0; i < size; i++) { | |
880a7578 | 1682 | gdb_read_byte(gdbserver_state, buf[i]); |
4046d913 PB |
1683 | } |
1684 | } | |
1685 | ||
1686 | static void gdb_chr_event(void *opaque, int event) | |
1687 | { | |
1688 | switch (event) { | |
b6b8df56 | 1689 | case CHR_EVENT_OPENED: |
0461d5a6 | 1690 | vm_stop(RUN_STATE_PAUSED); |
5b50e790 | 1691 | gdb_has_xml = false; |
4046d913 PB |
1692 | break; |
1693 | default: | |
1694 | break; | |
1695 | } | |
1696 | } | |
1697 | ||
8a34a0fb AL |
1698 | static void gdb_monitor_output(GDBState *s, const char *msg, int len) |
1699 | { | |
1700 | char buf[MAX_PACKET_LENGTH]; | |
1701 | ||
1702 | buf[0] = 'O'; | |
1703 | if (len > (MAX_PACKET_LENGTH/2) - 1) | |
1704 | len = (MAX_PACKET_LENGTH/2) - 1; | |
1705 | memtohex(buf + 1, (uint8_t *)msg, len); | |
1706 | put_packet(s, buf); | |
1707 | } | |
1708 | ||
1709 | static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len) | |
1710 | { | |
1711 | const char *p = (const char *)buf; | |
1712 | int max_sz; | |
1713 | ||
1714 | max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2; | |
1715 | for (;;) { | |
1716 | if (len <= max_sz) { | |
1717 | gdb_monitor_output(gdbserver_state, p, len); | |
1718 | break; | |
1719 | } | |
1720 | gdb_monitor_output(gdbserver_state, p, max_sz); | |
1721 | p += max_sz; | |
1722 | len -= max_sz; | |
1723 | } | |
1724 | return len; | |
1725 | } | |
1726 | ||
59030a8c AL |
1727 | #ifndef _WIN32 |
1728 | static void gdb_sigterm_handler(int signal) | |
1729 | { | |
1354869c | 1730 | if (runstate_is_running()) { |
0461d5a6 | 1731 | vm_stop(RUN_STATE_PAUSED); |
e07bbac5 | 1732 | } |
59030a8c AL |
1733 | } |
1734 | #endif | |
1735 | ||
1736 | int gdbserver_start(const char *device) | |
4046d913 PB |
1737 | { |
1738 | GDBState *s; | |
59030a8c | 1739 | char gdbstub_device_name[128]; |
36556b20 AL |
1740 | CharDriverState *chr = NULL; |
1741 | CharDriverState *mon_chr; | |
d0d7708b | 1742 | ChardevCommon common = { 0 }; |
cfc3475a | 1743 | |
59030a8c AL |
1744 | if (!device) |
1745 | return -1; | |
1746 | if (strcmp(device, "none") != 0) { | |
1747 | if (strstart(device, "tcp:", NULL)) { | |
1748 | /* enforce required TCP attributes */ | |
1749 | snprintf(gdbstub_device_name, sizeof(gdbstub_device_name), | |
1750 | "%s,nowait,nodelay,server", device); | |
1751 | device = gdbstub_device_name; | |
36556b20 | 1752 | } |
59030a8c AL |
1753 | #ifndef _WIN32 |
1754 | else if (strcmp(device, "stdio") == 0) { | |
1755 | struct sigaction act; | |
4046d913 | 1756 | |
59030a8c AL |
1757 | memset(&act, 0, sizeof(act)); |
1758 | act.sa_handler = gdb_sigterm_handler; | |
1759 | sigaction(SIGINT, &act, NULL); | |
1760 | } | |
1761 | #endif | |
27143a44 | 1762 | chr = qemu_chr_new("gdb", device, NULL); |
36556b20 AL |
1763 | if (!chr) |
1764 | return -1; | |
1765 | ||
456d6069 | 1766 | qemu_chr_fe_claim_no_fail(chr); |
36556b20 AL |
1767 | qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive, |
1768 | gdb_chr_event, NULL); | |
cfc3475a PB |
1769 | } |
1770 | ||
36556b20 AL |
1771 | s = gdbserver_state; |
1772 | if (!s) { | |
7267c094 | 1773 | s = g_malloc0(sizeof(GDBState)); |
36556b20 | 1774 | gdbserver_state = s; |
4046d913 | 1775 | |
36556b20 AL |
1776 | qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL); |
1777 | ||
1778 | /* Initialize a monitor terminal for gdb */ | |
d0d7708b | 1779 | mon_chr = qemu_chr_alloc(&common, &error_abort); |
36556b20 AL |
1780 | mon_chr->chr_write = gdb_monitor_write; |
1781 | monitor_init(mon_chr, 0); | |
1782 | } else { | |
1783 | if (s->chr) | |
70f24fb6 | 1784 | qemu_chr_delete(s->chr); |
36556b20 AL |
1785 | mon_chr = s->mon_chr; |
1786 | memset(s, 0, sizeof(GDBState)); | |
1787 | } | |
2e0f2cfb AF |
1788 | s->c_cpu = first_cpu; |
1789 | s->g_cpu = first_cpu; | |
4046d913 | 1790 | s->chr = chr; |
36556b20 AL |
1791 | s->state = chr ? RS_IDLE : RS_INACTIVE; |
1792 | s->mon_chr = mon_chr; | |
cdb432b2 | 1793 | s->current_syscall_cb = NULL; |
8a34a0fb | 1794 | |
b4608c04 FB |
1795 | return 0; |
1796 | } | |
4046d913 | 1797 | #endif |