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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" |
ca587a8e | 43 | |
f3659eee AF |
44 | static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, |
45 | uint8_t *buf, int len, bool is_write) | |
44520db1 | 46 | { |
f3659eee AF |
47 | CPUClass *cc = CPU_GET_CLASS(cpu); |
48 | ||
49 | if (cc->memory_rw_debug) { | |
50 | return cc->memory_rw_debug(cpu, addr, buf, len, is_write); | |
51 | } | |
52 | return cpu_memory_rw_debug(cpu, addr, buf, len, is_write); | |
44520db1 | 53 | } |
ca587a8e AJ |
54 | |
55 | enum { | |
56 | GDB_SIGNAL_0 = 0, | |
57 | GDB_SIGNAL_INT = 2, | |
425189a8 | 58 | GDB_SIGNAL_QUIT = 3, |
ca587a8e | 59 | GDB_SIGNAL_TRAP = 5, |
425189a8 JK |
60 | GDB_SIGNAL_ABRT = 6, |
61 | GDB_SIGNAL_ALRM = 14, | |
62 | GDB_SIGNAL_IO = 23, | |
63 | GDB_SIGNAL_XCPU = 24, | |
ca587a8e AJ |
64 | GDB_SIGNAL_UNKNOWN = 143 |
65 | }; | |
66 | ||
67 | #ifdef CONFIG_USER_ONLY | |
68 | ||
69 | /* Map target signal numbers to GDB protocol signal numbers and vice | |
70 | * versa. For user emulation's currently supported systems, we can | |
71 | * assume most signals are defined. | |
72 | */ | |
73 | ||
74 | static int gdb_signal_table[] = { | |
75 | 0, | |
76 | TARGET_SIGHUP, | |
77 | TARGET_SIGINT, | |
78 | TARGET_SIGQUIT, | |
79 | TARGET_SIGILL, | |
80 | TARGET_SIGTRAP, | |
81 | TARGET_SIGABRT, | |
82 | -1, /* SIGEMT */ | |
83 | TARGET_SIGFPE, | |
84 | TARGET_SIGKILL, | |
85 | TARGET_SIGBUS, | |
86 | TARGET_SIGSEGV, | |
87 | TARGET_SIGSYS, | |
88 | TARGET_SIGPIPE, | |
89 | TARGET_SIGALRM, | |
90 | TARGET_SIGTERM, | |
91 | TARGET_SIGURG, | |
92 | TARGET_SIGSTOP, | |
93 | TARGET_SIGTSTP, | |
94 | TARGET_SIGCONT, | |
95 | TARGET_SIGCHLD, | |
96 | TARGET_SIGTTIN, | |
97 | TARGET_SIGTTOU, | |
98 | TARGET_SIGIO, | |
99 | TARGET_SIGXCPU, | |
100 | TARGET_SIGXFSZ, | |
101 | TARGET_SIGVTALRM, | |
102 | TARGET_SIGPROF, | |
103 | TARGET_SIGWINCH, | |
104 | -1, /* SIGLOST */ | |
105 | TARGET_SIGUSR1, | |
106 | TARGET_SIGUSR2, | |
c72d5bf8 | 107 | #ifdef TARGET_SIGPWR |
ca587a8e | 108 | TARGET_SIGPWR, |
c72d5bf8 BS |
109 | #else |
110 | -1, | |
111 | #endif | |
ca587a8e AJ |
112 | -1, /* SIGPOLL */ |
113 | -1, | |
114 | -1, | |
115 | -1, | |
116 | -1, | |
117 | -1, | |
118 | -1, | |
119 | -1, | |
120 | -1, | |
121 | -1, | |
122 | -1, | |
123 | -1, | |
c72d5bf8 | 124 | #ifdef __SIGRTMIN |
ca587a8e AJ |
125 | __SIGRTMIN + 1, |
126 | __SIGRTMIN + 2, | |
127 | __SIGRTMIN + 3, | |
128 | __SIGRTMIN + 4, | |
129 | __SIGRTMIN + 5, | |
130 | __SIGRTMIN + 6, | |
131 | __SIGRTMIN + 7, | |
132 | __SIGRTMIN + 8, | |
133 | __SIGRTMIN + 9, | |
134 | __SIGRTMIN + 10, | |
135 | __SIGRTMIN + 11, | |
136 | __SIGRTMIN + 12, | |
137 | __SIGRTMIN + 13, | |
138 | __SIGRTMIN + 14, | |
139 | __SIGRTMIN + 15, | |
140 | __SIGRTMIN + 16, | |
141 | __SIGRTMIN + 17, | |
142 | __SIGRTMIN + 18, | |
143 | __SIGRTMIN + 19, | |
144 | __SIGRTMIN + 20, | |
145 | __SIGRTMIN + 21, | |
146 | __SIGRTMIN + 22, | |
147 | __SIGRTMIN + 23, | |
148 | __SIGRTMIN + 24, | |
149 | __SIGRTMIN + 25, | |
150 | __SIGRTMIN + 26, | |
151 | __SIGRTMIN + 27, | |
152 | __SIGRTMIN + 28, | |
153 | __SIGRTMIN + 29, | |
154 | __SIGRTMIN + 30, | |
155 | __SIGRTMIN + 31, | |
156 | -1, /* SIGCANCEL */ | |
157 | __SIGRTMIN, | |
158 | __SIGRTMIN + 32, | |
159 | __SIGRTMIN + 33, | |
160 | __SIGRTMIN + 34, | |
161 | __SIGRTMIN + 35, | |
162 | __SIGRTMIN + 36, | |
163 | __SIGRTMIN + 37, | |
164 | __SIGRTMIN + 38, | |
165 | __SIGRTMIN + 39, | |
166 | __SIGRTMIN + 40, | |
167 | __SIGRTMIN + 41, | |
168 | __SIGRTMIN + 42, | |
169 | __SIGRTMIN + 43, | |
170 | __SIGRTMIN + 44, | |
171 | __SIGRTMIN + 45, | |
172 | __SIGRTMIN + 46, | |
173 | __SIGRTMIN + 47, | |
174 | __SIGRTMIN + 48, | |
175 | __SIGRTMIN + 49, | |
176 | __SIGRTMIN + 50, | |
177 | __SIGRTMIN + 51, | |
178 | __SIGRTMIN + 52, | |
179 | __SIGRTMIN + 53, | |
180 | __SIGRTMIN + 54, | |
181 | __SIGRTMIN + 55, | |
182 | __SIGRTMIN + 56, | |
183 | __SIGRTMIN + 57, | |
184 | __SIGRTMIN + 58, | |
185 | __SIGRTMIN + 59, | |
186 | __SIGRTMIN + 60, | |
187 | __SIGRTMIN + 61, | |
188 | __SIGRTMIN + 62, | |
189 | __SIGRTMIN + 63, | |
190 | __SIGRTMIN + 64, | |
191 | __SIGRTMIN + 65, | |
192 | __SIGRTMIN + 66, | |
193 | __SIGRTMIN + 67, | |
194 | __SIGRTMIN + 68, | |
195 | __SIGRTMIN + 69, | |
196 | __SIGRTMIN + 70, | |
197 | __SIGRTMIN + 71, | |
198 | __SIGRTMIN + 72, | |
199 | __SIGRTMIN + 73, | |
200 | __SIGRTMIN + 74, | |
201 | __SIGRTMIN + 75, | |
202 | __SIGRTMIN + 76, | |
203 | __SIGRTMIN + 77, | |
204 | __SIGRTMIN + 78, | |
205 | __SIGRTMIN + 79, | |
206 | __SIGRTMIN + 80, | |
207 | __SIGRTMIN + 81, | |
208 | __SIGRTMIN + 82, | |
209 | __SIGRTMIN + 83, | |
210 | __SIGRTMIN + 84, | |
211 | __SIGRTMIN + 85, | |
212 | __SIGRTMIN + 86, | |
213 | __SIGRTMIN + 87, | |
214 | __SIGRTMIN + 88, | |
215 | __SIGRTMIN + 89, | |
216 | __SIGRTMIN + 90, | |
217 | __SIGRTMIN + 91, | |
218 | __SIGRTMIN + 92, | |
219 | __SIGRTMIN + 93, | |
220 | __SIGRTMIN + 94, | |
221 | __SIGRTMIN + 95, | |
222 | -1, /* SIGINFO */ | |
223 | -1, /* UNKNOWN */ | |
224 | -1, /* DEFAULT */ | |
225 | -1, | |
226 | -1, | |
227 | -1, | |
228 | -1, | |
229 | -1, | |
230 | -1 | |
c72d5bf8 | 231 | #endif |
ca587a8e | 232 | }; |
8f447cc7 | 233 | #else |
ca587a8e AJ |
234 | /* In system mode we only need SIGINT and SIGTRAP; other signals |
235 | are not yet supported. */ | |
236 | ||
237 | enum { | |
238 | TARGET_SIGINT = 2, | |
239 | TARGET_SIGTRAP = 5 | |
240 | }; | |
241 | ||
242 | static int gdb_signal_table[] = { | |
243 | -1, | |
244 | -1, | |
245 | TARGET_SIGINT, | |
246 | -1, | |
247 | -1, | |
248 | TARGET_SIGTRAP | |
249 | }; | |
250 | #endif | |
251 | ||
252 | #ifdef CONFIG_USER_ONLY | |
253 | static int target_signal_to_gdb (int sig) | |
254 | { | |
255 | int i; | |
256 | for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++) | |
257 | if (gdb_signal_table[i] == sig) | |
258 | return i; | |
259 | return GDB_SIGNAL_UNKNOWN; | |
260 | } | |
8f447cc7 | 261 | #endif |
b4608c04 | 262 | |
ca587a8e AJ |
263 | static int gdb_signal_to_target (int sig) |
264 | { | |
265 | if (sig < ARRAY_SIZE (gdb_signal_table)) | |
266 | return gdb_signal_table[sig]; | |
267 | else | |
268 | return -1; | |
269 | } | |
270 | ||
4abe615b | 271 | //#define DEBUG_GDB |
b4608c04 | 272 | |
56aebc89 PB |
273 | typedef struct GDBRegisterState { |
274 | int base_reg; | |
275 | int num_regs; | |
276 | gdb_reg_cb get_reg; | |
277 | gdb_reg_cb set_reg; | |
278 | const char *xml; | |
279 | struct GDBRegisterState *next; | |
280 | } GDBRegisterState; | |
281 | ||
858693c6 | 282 | enum RSState { |
36556b20 | 283 | RS_INACTIVE, |
858693c6 FB |
284 | RS_IDLE, |
285 | RS_GETLINE, | |
286 | RS_CHKSUM1, | |
287 | RS_CHKSUM2, | |
288 | }; | |
858693c6 | 289 | typedef struct GDBState { |
2e0f2cfb AF |
290 | CPUState *c_cpu; /* current CPU for step/continue ops */ |
291 | CPUState *g_cpu; /* current CPU for other ops */ | |
52f34623 | 292 | CPUState *query_cpu; /* for q{f|s}ThreadInfo */ |
41625033 | 293 | enum RSState state; /* parsing state */ |
56aebc89 | 294 | char line_buf[MAX_PACKET_LENGTH]; |
858693c6 FB |
295 | int line_buf_index; |
296 | int line_csum; | |
56aebc89 | 297 | uint8_t last_packet[MAX_PACKET_LENGTH + 4]; |
4046d913 | 298 | int last_packet_len; |
1f487ee9 | 299 | int signal; |
41625033 | 300 | #ifdef CONFIG_USER_ONLY |
4046d913 | 301 | int fd; |
41625033 | 302 | int running_state; |
4046d913 PB |
303 | #else |
304 | CharDriverState *chr; | |
8a34a0fb | 305 | CharDriverState *mon_chr; |
41625033 | 306 | #endif |
cdb432b2 MI |
307 | char syscall_buf[256]; |
308 | gdb_syscall_complete_cb current_syscall_cb; | |
858693c6 | 309 | } GDBState; |
b4608c04 | 310 | |
60897d36 EI |
311 | /* By default use no IRQs and no timers while single stepping so as to |
312 | * make single stepping like an ICE HW step. | |
313 | */ | |
314 | static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; | |
315 | ||
880a7578 AL |
316 | static GDBState *gdbserver_state; |
317 | ||
5b50e790 | 318 | bool gdb_has_xml; |
56aebc89 | 319 | |
a38bb079 LI |
320 | int semihosting_target = SEMIHOSTING_TARGET_AUTO; |
321 | ||
1fddef4b | 322 | #ifdef CONFIG_USER_ONLY |
4046d913 PB |
323 | /* XXX: This is not thread safe. Do we care? */ |
324 | static int gdbserver_fd = -1; | |
325 | ||
858693c6 | 326 | static int get_char(GDBState *s) |
b4608c04 FB |
327 | { |
328 | uint8_t ch; | |
329 | int ret; | |
330 | ||
331 | for(;;) { | |
00aa0040 | 332 | ret = qemu_recv(s->fd, &ch, 1, 0); |
b4608c04 | 333 | if (ret < 0) { |
1f487ee9 EI |
334 | if (errno == ECONNRESET) |
335 | s->fd = -1; | |
b4608c04 FB |
336 | if (errno != EINTR && errno != EAGAIN) |
337 | return -1; | |
338 | } else if (ret == 0) { | |
1f487ee9 EI |
339 | close(s->fd); |
340 | s->fd = -1; | |
b4608c04 FB |
341 | return -1; |
342 | } else { | |
343 | break; | |
344 | } | |
345 | } | |
346 | return ch; | |
347 | } | |
4046d913 | 348 | #endif |
b4608c04 | 349 | |
654efcf3 | 350 | static enum { |
a2d1ebaf PB |
351 | GDB_SYS_UNKNOWN, |
352 | GDB_SYS_ENABLED, | |
353 | GDB_SYS_DISABLED, | |
354 | } gdb_syscall_mode; | |
355 | ||
a38bb079 | 356 | /* Decide if either remote gdb syscalls or native file IO should be used. */ |
a2d1ebaf PB |
357 | int use_gdb_syscalls(void) |
358 | { | |
a38bb079 LI |
359 | if (semihosting_target == SEMIHOSTING_TARGET_NATIVE) { |
360 | /* -semihosting-config target=native */ | |
361 | return false; | |
362 | } else if (semihosting_target == SEMIHOSTING_TARGET_GDB) { | |
363 | /* -semihosting-config target=gdb */ | |
364 | return true; | |
365 | } | |
366 | ||
367 | /* -semihosting-config target=auto */ | |
368 | /* On the first call check if gdb is connected and remember. */ | |
a2d1ebaf | 369 | if (gdb_syscall_mode == GDB_SYS_UNKNOWN) { |
880a7578 AL |
370 | gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED |
371 | : GDB_SYS_DISABLED); | |
a2d1ebaf PB |
372 | } |
373 | return gdb_syscall_mode == GDB_SYS_ENABLED; | |
374 | } | |
375 | ||
ba70a624 EI |
376 | /* Resume execution. */ |
377 | static inline void gdb_continue(GDBState *s) | |
378 | { | |
379 | #ifdef CONFIG_USER_ONLY | |
380 | s->running_state = 1; | |
381 | #else | |
26ac7a31 | 382 | if (!runstate_needs_reset()) { |
87f25c12 PB |
383 | vm_start(); |
384 | } | |
ba70a624 EI |
385 | #endif |
386 | } | |
387 | ||
858693c6 | 388 | static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
b4608c04 | 389 | { |
4046d913 | 390 | #ifdef CONFIG_USER_ONLY |
b4608c04 FB |
391 | int ret; |
392 | ||
393 | while (len > 0) { | |
8f447cc7 | 394 | ret = send(s->fd, buf, len, 0); |
b4608c04 FB |
395 | if (ret < 0) { |
396 | if (errno != EINTR && errno != EAGAIN) | |
397 | return; | |
398 | } else { | |
399 | buf += ret; | |
400 | len -= ret; | |
401 | } | |
402 | } | |
4046d913 | 403 | #else |
2cc6e0a1 | 404 | qemu_chr_fe_write(s->chr, buf, len); |
4046d913 | 405 | #endif |
b4608c04 FB |
406 | } |
407 | ||
408 | static inline int fromhex(int v) | |
409 | { | |
410 | if (v >= '0' && v <= '9') | |
411 | return v - '0'; | |
412 | else if (v >= 'A' && v <= 'F') | |
413 | return v - 'A' + 10; | |
414 | else if (v >= 'a' && v <= 'f') | |
415 | return v - 'a' + 10; | |
416 | else | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static inline int tohex(int v) | |
421 | { | |
422 | if (v < 10) | |
423 | return v + '0'; | |
424 | else | |
425 | return v - 10 + 'a'; | |
426 | } | |
427 | ||
428 | static void memtohex(char *buf, const uint8_t *mem, int len) | |
429 | { | |
430 | int i, c; | |
431 | char *q; | |
432 | q = buf; | |
433 | for(i = 0; i < len; i++) { | |
434 | c = mem[i]; | |
435 | *q++ = tohex(c >> 4); | |
436 | *q++ = tohex(c & 0xf); | |
437 | } | |
438 | *q = '\0'; | |
439 | } | |
440 | ||
441 | static void hextomem(uint8_t *mem, const char *buf, int len) | |
442 | { | |
443 | int i; | |
444 | ||
445 | for(i = 0; i < len; i++) { | |
446 | mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); | |
447 | buf += 2; | |
448 | } | |
449 | } | |
450 | ||
b4608c04 | 451 | /* return -1 if error, 0 if OK */ |
56aebc89 | 452 | static int put_packet_binary(GDBState *s, const char *buf, int len) |
b4608c04 | 453 | { |
56aebc89 | 454 | int csum, i; |
60fe76f3 | 455 | uint8_t *p; |
b4608c04 | 456 | |
b4608c04 | 457 | for(;;) { |
4046d913 PB |
458 | p = s->last_packet; |
459 | *(p++) = '$'; | |
4046d913 PB |
460 | memcpy(p, buf, len); |
461 | p += len; | |
b4608c04 FB |
462 | csum = 0; |
463 | for(i = 0; i < len; i++) { | |
464 | csum += buf[i]; | |
465 | } | |
4046d913 PB |
466 | *(p++) = '#'; |
467 | *(p++) = tohex((csum >> 4) & 0xf); | |
468 | *(p++) = tohex((csum) & 0xf); | |
b4608c04 | 469 | |
4046d913 | 470 | s->last_packet_len = p - s->last_packet; |
ffe8ab83 | 471 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
b4608c04 | 472 | |
4046d913 PB |
473 | #ifdef CONFIG_USER_ONLY |
474 | i = get_char(s); | |
475 | if (i < 0) | |
b4608c04 | 476 | return -1; |
4046d913 | 477 | if (i == '+') |
b4608c04 | 478 | break; |
4046d913 PB |
479 | #else |
480 | break; | |
481 | #endif | |
b4608c04 FB |
482 | } |
483 | return 0; | |
484 | } | |
485 | ||
56aebc89 PB |
486 | /* return -1 if error, 0 if OK */ |
487 | static int put_packet(GDBState *s, const char *buf) | |
488 | { | |
489 | #ifdef DEBUG_GDB | |
490 | printf("reply='%s'\n", buf); | |
491 | #endif | |
79808573 | 492 | |
56aebc89 PB |
493 | return put_packet_binary(s, buf, strlen(buf)); |
494 | } | |
495 | ||
56aebc89 PB |
496 | /* Encode data using the encoding for 'x' packets. */ |
497 | static int memtox(char *buf, const char *mem, int len) | |
498 | { | |
499 | char *p = buf; | |
500 | char c; | |
501 | ||
502 | while (len--) { | |
503 | c = *(mem++); | |
504 | switch (c) { | |
505 | case '#': case '$': case '*': case '}': | |
506 | *(p++) = '}'; | |
507 | *(p++) = c ^ 0x20; | |
508 | break; | |
509 | default: | |
510 | *(p++) = c; | |
511 | break; | |
512 | } | |
513 | } | |
514 | return p - buf; | |
515 | } | |
f1ccf904 | 516 | |
5b24c641 AF |
517 | static const char *get_feature_xml(const char *p, const char **newp, |
518 | CPUClass *cc) | |
56aebc89 | 519 | { |
56aebc89 PB |
520 | size_t len; |
521 | int i; | |
522 | const char *name; | |
523 | static char target_xml[1024]; | |
524 | ||
525 | len = 0; | |
526 | while (p[len] && p[len] != ':') | |
527 | len++; | |
528 | *newp = p + len; | |
529 | ||
530 | name = NULL; | |
531 | if (strncmp(p, "target.xml", len) == 0) { | |
532 | /* Generate the XML description for this CPU. */ | |
533 | if (!target_xml[0]) { | |
534 | GDBRegisterState *r; | |
eac8b355 | 535 | CPUState *cpu = first_cpu; |
56aebc89 | 536 | |
5b3715bf BS |
537 | snprintf(target_xml, sizeof(target_xml), |
538 | "<?xml version=\"1.0\"?>" | |
539 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">" | |
540 | "<target>" | |
541 | "<xi:include href=\"%s\"/>", | |
5b24c641 | 542 | cc->gdb_core_xml_file); |
56aebc89 | 543 | |
eac8b355 | 544 | for (r = cpu->gdb_regs; r; r = r->next) { |
2dc766da BS |
545 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); |
546 | pstrcat(target_xml, sizeof(target_xml), r->xml); | |
547 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
56aebc89 | 548 | } |
2dc766da | 549 | pstrcat(target_xml, sizeof(target_xml), "</target>"); |
56aebc89 PB |
550 | } |
551 | return target_xml; | |
552 | } | |
553 | for (i = 0; ; i++) { | |
554 | name = xml_builtin[i][0]; | |
555 | if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) | |
556 | break; | |
557 | } | |
558 | return name ? xml_builtin[i][1] : NULL; | |
559 | } | |
f1ccf904 | 560 | |
385b9f0e | 561 | static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
56aebc89 | 562 | { |
a0e372f0 | 563 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 564 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 565 | GDBRegisterState *r; |
f1ccf904 | 566 | |
a0e372f0 | 567 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 568 | return cc->gdb_read_register(cpu, mem_buf, reg); |
a0e372f0 | 569 | } |
f1ccf904 | 570 | |
eac8b355 | 571 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
572 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
573 | return r->get_reg(env, mem_buf, reg - r->base_reg); | |
574 | } | |
575 | } | |
576 | return 0; | |
f1ccf904 TS |
577 | } |
578 | ||
385b9f0e | 579 | static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
f1ccf904 | 580 | { |
a0e372f0 | 581 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 582 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 583 | GDBRegisterState *r; |
f1ccf904 | 584 | |
a0e372f0 | 585 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 586 | return cc->gdb_write_register(cpu, mem_buf, reg); |
a0e372f0 | 587 | } |
56aebc89 | 588 | |
eac8b355 | 589 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
590 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
591 | return r->set_reg(env, mem_buf, reg - r->base_reg); | |
592 | } | |
593 | } | |
6da41eaf FB |
594 | return 0; |
595 | } | |
596 | ||
56aebc89 PB |
597 | /* Register a supplemental set of CPU registers. If g_pos is nonzero it |
598 | specifies the first register number and these registers are included in | |
599 | a standard "g" packet. Direction is relative to gdb, i.e. get_reg is | |
600 | gdb reading a CPU register, and set_reg is gdb modifying a CPU register. | |
601 | */ | |
602 | ||
22169d41 AF |
603 | void gdb_register_coprocessor(CPUState *cpu, |
604 | gdb_reg_cb get_reg, gdb_reg_cb set_reg, | |
605 | int num_regs, const char *xml, int g_pos) | |
6da41eaf | 606 | { |
56aebc89 PB |
607 | GDBRegisterState *s; |
608 | GDBRegisterState **p; | |
56aebc89 | 609 | |
eac8b355 | 610 | p = &cpu->gdb_regs; |
56aebc89 PB |
611 | while (*p) { |
612 | /* Check for duplicates. */ | |
613 | if (strcmp((*p)->xml, xml) == 0) | |
614 | return; | |
615 | p = &(*p)->next; | |
616 | } | |
9643c25f SW |
617 | |
618 | s = g_new0(GDBRegisterState, 1); | |
a0e372f0 | 619 | s->base_reg = cpu->gdb_num_regs; |
9643c25f SW |
620 | s->num_regs = num_regs; |
621 | s->get_reg = get_reg; | |
622 | s->set_reg = set_reg; | |
623 | s->xml = xml; | |
624 | ||
56aebc89 | 625 | /* Add to end of list. */ |
a0e372f0 | 626 | cpu->gdb_num_regs += num_regs; |
56aebc89 PB |
627 | *p = s; |
628 | if (g_pos) { | |
629 | if (g_pos != s->base_reg) { | |
630 | fprintf(stderr, "Error: Bad gdb register numbering for '%s'\n" | |
631 | "Expected %d got %d\n", xml, g_pos, s->base_reg); | |
35143f01 AF |
632 | } else { |
633 | cpu->gdb_num_g_regs = cpu->gdb_num_regs; | |
56aebc89 PB |
634 | } |
635 | } | |
6da41eaf FB |
636 | } |
637 | ||
a1d1bb31 | 638 | #ifndef CONFIG_USER_ONLY |
2472b6c0 PM |
639 | /* Translate GDB watchpoint type to a flags value for cpu_watchpoint_* */ |
640 | static inline int xlat_gdb_type(CPUState *cpu, int gdbtype) | |
641 | { | |
642 | static const int xlat[] = { | |
643 | [GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, | |
644 | [GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, | |
645 | [GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, | |
646 | }; | |
647 | ||
648 | CPUClass *cc = CPU_GET_CLASS(cpu); | |
649 | int cputype = xlat[gdbtype]; | |
650 | ||
651 | if (cc->gdb_stop_before_watchpoint) { | |
652 | cputype |= BP_STOP_BEFORE_ACCESS; | |
653 | } | |
654 | return cputype; | |
655 | } | |
a1d1bb31 AL |
656 | #endif |
657 | ||
880a7578 | 658 | static int gdb_breakpoint_insert(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 659 | { |
182735ef | 660 | CPUState *cpu; |
880a7578 AL |
661 | int err = 0; |
662 | ||
62278814 | 663 | if (kvm_enabled()) { |
2e0f2cfb | 664 | return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 665 | } |
e22a25c9 | 666 | |
a1d1bb31 AL |
667 | switch (type) { |
668 | case GDB_BREAKPOINT_SW: | |
669 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 670 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
671 | err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL); |
672 | if (err) { | |
880a7578 | 673 | break; |
b3310ab3 | 674 | } |
880a7578 AL |
675 | } |
676 | return err; | |
a1d1bb31 AL |
677 | #ifndef CONFIG_USER_ONLY |
678 | case GDB_WATCHPOINT_WRITE: | |
679 | case GDB_WATCHPOINT_READ: | |
680 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 681 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
682 | err = cpu_watchpoint_insert(cpu, addr, len, |
683 | xlat_gdb_type(cpu, type), NULL); | |
684 | if (err) { | |
880a7578 | 685 | break; |
2472b6c0 | 686 | } |
880a7578 AL |
687 | } |
688 | return err; | |
a1d1bb31 AL |
689 | #endif |
690 | default: | |
691 | return -ENOSYS; | |
692 | } | |
693 | } | |
694 | ||
880a7578 | 695 | static int gdb_breakpoint_remove(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 696 | { |
182735ef | 697 | CPUState *cpu; |
880a7578 AL |
698 | int err = 0; |
699 | ||
62278814 | 700 | if (kvm_enabled()) { |
2e0f2cfb | 701 | return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 702 | } |
e22a25c9 | 703 | |
a1d1bb31 AL |
704 | switch (type) { |
705 | case GDB_BREAKPOINT_SW: | |
706 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 707 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
708 | err = cpu_breakpoint_remove(cpu, addr, BP_GDB); |
709 | if (err) { | |
880a7578 | 710 | break; |
b3310ab3 | 711 | } |
880a7578 AL |
712 | } |
713 | return err; | |
a1d1bb31 AL |
714 | #ifndef CONFIG_USER_ONLY |
715 | case GDB_WATCHPOINT_WRITE: | |
716 | case GDB_WATCHPOINT_READ: | |
717 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 718 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
719 | err = cpu_watchpoint_remove(cpu, addr, len, |
720 | xlat_gdb_type(cpu, type)); | |
880a7578 AL |
721 | if (err) |
722 | break; | |
723 | } | |
724 | return err; | |
a1d1bb31 AL |
725 | #endif |
726 | default: | |
727 | return -ENOSYS; | |
728 | } | |
729 | } | |
730 | ||
880a7578 | 731 | static void gdb_breakpoint_remove_all(void) |
a1d1bb31 | 732 | { |
182735ef | 733 | CPUState *cpu; |
880a7578 | 734 | |
e22a25c9 | 735 | if (kvm_enabled()) { |
2e0f2cfb | 736 | kvm_remove_all_breakpoints(gdbserver_state->c_cpu); |
e22a25c9 AL |
737 | return; |
738 | } | |
739 | ||
bdc44640 | 740 | CPU_FOREACH(cpu) { |
b3310ab3 | 741 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 742 | #ifndef CONFIG_USER_ONLY |
75a34036 | 743 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 744 | #endif |
880a7578 | 745 | } |
a1d1bb31 AL |
746 | } |
747 | ||
fab9d284 AJ |
748 | static void gdb_set_cpu_pc(GDBState *s, target_ulong pc) |
749 | { | |
2e0f2cfb | 750 | CPUState *cpu = s->c_cpu; |
f45748f1 AF |
751 | CPUClass *cc = CPU_GET_CLASS(cpu); |
752 | ||
753 | cpu_synchronize_state(cpu); | |
754 | if (cc->set_pc) { | |
755 | cc->set_pc(cpu, pc); | |
ff1d1977 | 756 | } |
fab9d284 AJ |
757 | } |
758 | ||
2e0f2cfb | 759 | static CPUState *find_cpu(uint32_t thread_id) |
1e9fa730 | 760 | { |
0d34282f | 761 | CPUState *cpu; |
1e9fa730 | 762 | |
bdc44640 | 763 | CPU_FOREACH(cpu) { |
aa48dd93 | 764 | if (cpu_index(cpu) == thread_id) { |
2e0f2cfb | 765 | return cpu; |
aa48dd93 | 766 | } |
1e9fa730 | 767 | } |
aa48dd93 AF |
768 | |
769 | return NULL; | |
1e9fa730 NF |
770 | } |
771 | ||
4dabe747 JK |
772 | static int is_query_packet(const char *p, const char *query, char separator) |
773 | { | |
774 | unsigned int query_len = strlen(query); | |
775 | ||
776 | return strncmp(p, query, query_len) == 0 && | |
777 | (p[query_len] == '\0' || p[query_len] == separator); | |
778 | } | |
779 | ||
880a7578 | 780 | static int gdb_handle_packet(GDBState *s, const char *line_buf) |
b4608c04 | 781 | { |
2e0f2cfb | 782 | CPUState *cpu; |
5b24c641 | 783 | CPUClass *cc; |
b4608c04 | 784 | const char *p; |
1e9fa730 NF |
785 | uint32_t thread; |
786 | int ch, reg_size, type, res; | |
56aebc89 PB |
787 | char buf[MAX_PACKET_LENGTH]; |
788 | uint8_t mem_buf[MAX_PACKET_LENGTH]; | |
789 | uint8_t *registers; | |
9d9754a3 | 790 | target_ulong addr, len; |
3b46e624 | 791 | |
858693c6 FB |
792 | #ifdef DEBUG_GDB |
793 | printf("command='%s'\n", line_buf); | |
794 | #endif | |
795 | p = line_buf; | |
796 | ch = *p++; | |
797 | switch(ch) { | |
798 | case '?': | |
1fddef4b | 799 | /* TODO: Make this return the correct value for user-mode. */ |
ca587a8e | 800 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", GDB_SIGNAL_TRAP, |
2e0f2cfb | 801 | cpu_index(s->c_cpu)); |
858693c6 | 802 | put_packet(s, buf); |
7d03f82f EI |
803 | /* Remove all the breakpoints when this query is issued, |
804 | * because gdb is doing and initial connect and the state | |
805 | * should be cleaned up. | |
806 | */ | |
880a7578 | 807 | gdb_breakpoint_remove_all(); |
858693c6 FB |
808 | break; |
809 | case 'c': | |
810 | if (*p != '\0') { | |
9d9754a3 | 811 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 812 | gdb_set_cpu_pc(s, addr); |
858693c6 | 813 | } |
ca587a8e | 814 | s->signal = 0; |
ba70a624 | 815 | gdb_continue(s); |
41625033 | 816 | return RS_IDLE; |
1f487ee9 | 817 | case 'C': |
ca587a8e AJ |
818 | s->signal = gdb_signal_to_target (strtoul(p, (char **)&p, 16)); |
819 | if (s->signal == -1) | |
820 | s->signal = 0; | |
1f487ee9 EI |
821 | gdb_continue(s); |
822 | return RS_IDLE; | |
dd32aa10 JK |
823 | case 'v': |
824 | if (strncmp(p, "Cont", 4) == 0) { | |
825 | int res_signal, res_thread; | |
826 | ||
827 | p += 4; | |
828 | if (*p == '?') { | |
829 | put_packet(s, "vCont;c;C;s;S"); | |
830 | break; | |
831 | } | |
832 | res = 0; | |
833 | res_signal = 0; | |
834 | res_thread = 0; | |
835 | while (*p) { | |
836 | int action, signal; | |
837 | ||
838 | if (*p++ != ';') { | |
839 | res = 0; | |
840 | break; | |
841 | } | |
842 | action = *p++; | |
843 | signal = 0; | |
844 | if (action == 'C' || action == 'S') { | |
f17b0690 MS |
845 | signal = gdb_signal_to_target(strtoul(p, (char **)&p, 16)); |
846 | if (signal == -1) { | |
847 | signal = 0; | |
848 | } | |
dd32aa10 JK |
849 | } else if (action != 'c' && action != 's') { |
850 | res = 0; | |
851 | break; | |
852 | } | |
853 | thread = 0; | |
854 | if (*p == ':') { | |
855 | thread = strtoull(p+1, (char **)&p, 16); | |
856 | } | |
857 | action = tolower(action); | |
858 | if (res == 0 || (res == 'c' && action == 's')) { | |
859 | res = action; | |
860 | res_signal = signal; | |
861 | res_thread = thread; | |
862 | } | |
863 | } | |
864 | if (res) { | |
865 | if (res_thread != -1 && res_thread != 0) { | |
2e0f2cfb AF |
866 | cpu = find_cpu(res_thread); |
867 | if (cpu == NULL) { | |
dd32aa10 JK |
868 | put_packet(s, "E22"); |
869 | break; | |
870 | } | |
2e0f2cfb | 871 | s->c_cpu = cpu; |
dd32aa10 JK |
872 | } |
873 | if (res == 's') { | |
2e0f2cfb | 874 | cpu_single_step(s->c_cpu, sstep_flags); |
dd32aa10 JK |
875 | } |
876 | s->signal = res_signal; | |
877 | gdb_continue(s); | |
878 | return RS_IDLE; | |
879 | } | |
880 | break; | |
881 | } else { | |
882 | goto unknown_command; | |
883 | } | |
7d03f82f | 884 | case 'k': |
00e94dbc | 885 | #ifdef CONFIG_USER_ONLY |
7d03f82f EI |
886 | /* Kill the target */ |
887 | fprintf(stderr, "\nQEMU: Terminated via GDBstub\n"); | |
888 | exit(0); | |
00e94dbc | 889 | #endif |
7d03f82f EI |
890 | case 'D': |
891 | /* Detach packet */ | |
880a7578 | 892 | gdb_breakpoint_remove_all(); |
7ea06da3 | 893 | gdb_syscall_mode = GDB_SYS_DISABLED; |
7d03f82f EI |
894 | gdb_continue(s); |
895 | put_packet(s, "OK"); | |
896 | break; | |
858693c6 FB |
897 | case 's': |
898 | if (*p != '\0') { | |
8fac5803 | 899 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 900 | gdb_set_cpu_pc(s, addr); |
858693c6 | 901 | } |
2e0f2cfb | 902 | cpu_single_step(s->c_cpu, sstep_flags); |
ba70a624 | 903 | gdb_continue(s); |
41625033 | 904 | return RS_IDLE; |
a2d1ebaf PB |
905 | case 'F': |
906 | { | |
907 | target_ulong ret; | |
908 | target_ulong err; | |
909 | ||
910 | ret = strtoull(p, (char **)&p, 16); | |
911 | if (*p == ',') { | |
912 | p++; | |
913 | err = strtoull(p, (char **)&p, 16); | |
914 | } else { | |
915 | err = 0; | |
916 | } | |
917 | if (*p == ',') | |
918 | p++; | |
919 | type = *p; | |
cdb432b2 | 920 | if (s->current_syscall_cb) { |
2e0f2cfb | 921 | s->current_syscall_cb(s->c_cpu, ret, err); |
cdb432b2 MI |
922 | s->current_syscall_cb = NULL; |
923 | } | |
a2d1ebaf PB |
924 | if (type == 'C') { |
925 | put_packet(s, "T02"); | |
926 | } else { | |
ba70a624 | 927 | gdb_continue(s); |
a2d1ebaf PB |
928 | } |
929 | } | |
930 | break; | |
858693c6 | 931 | case 'g': |
2e0f2cfb | 932 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 933 | len = 0; |
35143f01 | 934 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs; addr++) { |
2e0f2cfb | 935 | reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr); |
56aebc89 PB |
936 | len += reg_size; |
937 | } | |
938 | memtohex(buf, mem_buf, len); | |
858693c6 FB |
939 | put_packet(s, buf); |
940 | break; | |
941 | case 'G': | |
2e0f2cfb | 942 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 943 | registers = mem_buf; |
858693c6 FB |
944 | len = strlen(p) / 2; |
945 | hextomem((uint8_t *)registers, p, len); | |
35143f01 | 946 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs && len > 0; addr++) { |
2e0f2cfb | 947 | reg_size = gdb_write_register(s->g_cpu, registers, addr); |
56aebc89 PB |
948 | len -= reg_size; |
949 | registers += reg_size; | |
950 | } | |
858693c6 FB |
951 | put_packet(s, "OK"); |
952 | break; | |
953 | case 'm': | |
9d9754a3 | 954 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
955 | if (*p == ',') |
956 | p++; | |
9d9754a3 | 957 | len = strtoull(p, NULL, 16); |
2e0f2cfb | 958 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, false) != 0) { |
6f970bd9 FB |
959 | put_packet (s, "E14"); |
960 | } else { | |
961 | memtohex(buf, mem_buf, len); | |
962 | put_packet(s, buf); | |
963 | } | |
858693c6 FB |
964 | break; |
965 | case 'M': | |
9d9754a3 | 966 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
967 | if (*p == ',') |
968 | p++; | |
9d9754a3 | 969 | len = strtoull(p, (char **)&p, 16); |
b328f873 | 970 | if (*p == ':') |
858693c6 FB |
971 | p++; |
972 | hextomem(mem_buf, p, len); | |
2e0f2cfb | 973 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, |
f3659eee | 974 | true) != 0) { |
905f20b1 | 975 | put_packet(s, "E14"); |
44520db1 | 976 | } else { |
858693c6 | 977 | put_packet(s, "OK"); |
44520db1 | 978 | } |
858693c6 | 979 | break; |
56aebc89 PB |
980 | case 'p': |
981 | /* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable. | |
982 | This works, but can be very slow. Anything new enough to | |
983 | understand XML also knows how to use this properly. */ | |
984 | if (!gdb_has_xml) | |
985 | goto unknown_command; | |
986 | addr = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 987 | reg_size = gdb_read_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
988 | if (reg_size) { |
989 | memtohex(buf, mem_buf, reg_size); | |
990 | put_packet(s, buf); | |
991 | } else { | |
992 | put_packet(s, "E14"); | |
993 | } | |
994 | break; | |
995 | case 'P': | |
996 | if (!gdb_has_xml) | |
997 | goto unknown_command; | |
998 | addr = strtoull(p, (char **)&p, 16); | |
999 | if (*p == '=') | |
1000 | p++; | |
1001 | reg_size = strlen(p) / 2; | |
1002 | hextomem(mem_buf, p, reg_size); | |
2e0f2cfb | 1003 | gdb_write_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1004 | put_packet(s, "OK"); |
1005 | break; | |
858693c6 | 1006 | case 'Z': |
858693c6 FB |
1007 | case 'z': |
1008 | type = strtoul(p, (char **)&p, 16); | |
1009 | if (*p == ',') | |
1010 | p++; | |
9d9754a3 | 1011 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1012 | if (*p == ',') |
1013 | p++; | |
9d9754a3 | 1014 | len = strtoull(p, (char **)&p, 16); |
a1d1bb31 | 1015 | if (ch == 'Z') |
880a7578 | 1016 | res = gdb_breakpoint_insert(addr, len, type); |
a1d1bb31 | 1017 | else |
880a7578 | 1018 | res = gdb_breakpoint_remove(addr, len, type); |
a1d1bb31 AL |
1019 | if (res >= 0) |
1020 | put_packet(s, "OK"); | |
1021 | else if (res == -ENOSYS) | |
0f459d16 | 1022 | put_packet(s, ""); |
a1d1bb31 AL |
1023 | else |
1024 | put_packet(s, "E22"); | |
858693c6 | 1025 | break; |
880a7578 AL |
1026 | case 'H': |
1027 | type = *p++; | |
1028 | thread = strtoull(p, (char **)&p, 16); | |
1029 | if (thread == -1 || thread == 0) { | |
1030 | put_packet(s, "OK"); | |
1031 | break; | |
1032 | } | |
2e0f2cfb AF |
1033 | cpu = find_cpu(thread); |
1034 | if (cpu == NULL) { | |
880a7578 AL |
1035 | put_packet(s, "E22"); |
1036 | break; | |
1037 | } | |
1038 | switch (type) { | |
1039 | case 'c': | |
2e0f2cfb | 1040 | s->c_cpu = cpu; |
880a7578 AL |
1041 | put_packet(s, "OK"); |
1042 | break; | |
1043 | case 'g': | |
2e0f2cfb | 1044 | s->g_cpu = cpu; |
880a7578 AL |
1045 | put_packet(s, "OK"); |
1046 | break; | |
1047 | default: | |
1048 | put_packet(s, "E22"); | |
1049 | break; | |
1050 | } | |
1051 | break; | |
1052 | case 'T': | |
1053 | thread = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 1054 | cpu = find_cpu(thread); |
1e9fa730 | 1055 | |
2e0f2cfb | 1056 | if (cpu != NULL) { |
1e9fa730 NF |
1057 | put_packet(s, "OK"); |
1058 | } else { | |
880a7578 | 1059 | put_packet(s, "E22"); |
1e9fa730 | 1060 | } |
880a7578 | 1061 | break; |
978efd6a | 1062 | case 'q': |
60897d36 EI |
1063 | case 'Q': |
1064 | /* parse any 'q' packets here */ | |
1065 | if (!strcmp(p,"qemu.sstepbits")) { | |
1066 | /* Query Breakpoint bit definitions */ | |
363a37d5 BS |
1067 | snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
1068 | SSTEP_ENABLE, | |
1069 | SSTEP_NOIRQ, | |
1070 | SSTEP_NOTIMER); | |
60897d36 EI |
1071 | put_packet(s, buf); |
1072 | break; | |
4dabe747 | 1073 | } else if (is_query_packet(p, "qemu.sstep", '=')) { |
60897d36 EI |
1074 | /* Display or change the sstep_flags */ |
1075 | p += 10; | |
1076 | if (*p != '=') { | |
1077 | /* Display current setting */ | |
363a37d5 | 1078 | snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
60897d36 EI |
1079 | put_packet(s, buf); |
1080 | break; | |
1081 | } | |
1082 | p++; | |
1083 | type = strtoul(p, (char **)&p, 16); | |
1084 | sstep_flags = type; | |
1085 | put_packet(s, "OK"); | |
1086 | break; | |
880a7578 AL |
1087 | } else if (strcmp(p,"C") == 0) { |
1088 | /* "Current thread" remains vague in the spec, so always return | |
1089 | * the first CPU (gdb returns the first thread). */ | |
1090 | put_packet(s, "QC1"); | |
1091 | break; | |
1092 | } else if (strcmp(p,"fThreadInfo") == 0) { | |
52f34623 | 1093 | s->query_cpu = first_cpu; |
880a7578 AL |
1094 | goto report_cpuinfo; |
1095 | } else if (strcmp(p,"sThreadInfo") == 0) { | |
1096 | report_cpuinfo: | |
1097 | if (s->query_cpu) { | |
52f34623 | 1098 | snprintf(buf, sizeof(buf), "m%x", cpu_index(s->query_cpu)); |
880a7578 | 1099 | put_packet(s, buf); |
bdc44640 | 1100 | s->query_cpu = CPU_NEXT(s->query_cpu); |
880a7578 AL |
1101 | } else |
1102 | put_packet(s, "l"); | |
1103 | break; | |
1104 | } else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) { | |
1105 | thread = strtoull(p+16, (char **)&p, 16); | |
2e0f2cfb AF |
1106 | cpu = find_cpu(thread); |
1107 | if (cpu != NULL) { | |
cb446eca | 1108 | cpu_synchronize_state(cpu); |
1e9fa730 | 1109 | len = snprintf((char *)mem_buf, sizeof(mem_buf), |
55e5c285 | 1110 | "CPU#%d [%s]", cpu->cpu_index, |
259186a7 | 1111 | cpu->halted ? "halted " : "running"); |
1e9fa730 NF |
1112 | memtohex(buf, mem_buf, len); |
1113 | put_packet(s, buf); | |
1114 | } | |
880a7578 | 1115 | break; |
60897d36 | 1116 | } |
0b8a988c | 1117 | #ifdef CONFIG_USER_ONLY |
070949f3 | 1118 | else if (strcmp(p, "Offsets") == 0) { |
0429a971 | 1119 | TaskState *ts = s->c_cpu->opaque; |
978efd6a | 1120 | |
363a37d5 BS |
1121 | snprintf(buf, sizeof(buf), |
1122 | "Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx | |
1123 | ";Bss=" TARGET_ABI_FMT_lx, | |
1124 | ts->info->code_offset, | |
1125 | ts->info->data_offset, | |
1126 | ts->info->data_offset); | |
978efd6a PB |
1127 | put_packet(s, buf); |
1128 | break; | |
1129 | } | |
0b8a988c | 1130 | #else /* !CONFIG_USER_ONLY */ |
8a34a0fb AL |
1131 | else if (strncmp(p, "Rcmd,", 5) == 0) { |
1132 | int len = strlen(p + 5); | |
1133 | ||
1134 | if ((len % 2) != 0) { | |
1135 | put_packet(s, "E01"); | |
1136 | break; | |
1137 | } | |
1138 | hextomem(mem_buf, p + 5, len); | |
1139 | len = len / 2; | |
1140 | mem_buf[len++] = 0; | |
fa5efccb | 1141 | qemu_chr_be_write(s->mon_chr, mem_buf, len); |
8a34a0fb AL |
1142 | put_packet(s, "OK"); |
1143 | break; | |
1144 | } | |
0b8a988c | 1145 | #endif /* !CONFIG_USER_ONLY */ |
4dabe747 | 1146 | if (is_query_packet(p, "Supported", ':')) { |
5b3715bf | 1147 | snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
5b24c641 AF |
1148 | cc = CPU_GET_CLASS(first_cpu); |
1149 | if (cc->gdb_core_xml_file != NULL) { | |
1150 | pstrcat(buf, sizeof(buf), ";qXfer:features:read+"); | |
1151 | } | |
56aebc89 PB |
1152 | put_packet(s, buf); |
1153 | break; | |
1154 | } | |
56aebc89 PB |
1155 | if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
1156 | const char *xml; | |
1157 | target_ulong total_len; | |
1158 | ||
5b24c641 AF |
1159 | cc = CPU_GET_CLASS(first_cpu); |
1160 | if (cc->gdb_core_xml_file == NULL) { | |
1161 | goto unknown_command; | |
1162 | } | |
1163 | ||
5b50e790 | 1164 | gdb_has_xml = true; |
56aebc89 | 1165 | p += 19; |
5b24c641 | 1166 | xml = get_feature_xml(p, &p, cc); |
56aebc89 | 1167 | if (!xml) { |
5b3715bf | 1168 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1169 | put_packet(s, buf); |
1170 | break; | |
1171 | } | |
1172 | ||
1173 | if (*p == ':') | |
1174 | p++; | |
1175 | addr = strtoul(p, (char **)&p, 16); | |
1176 | if (*p == ',') | |
1177 | p++; | |
1178 | len = strtoul(p, (char **)&p, 16); | |
1179 | ||
1180 | total_len = strlen(xml); | |
1181 | if (addr > total_len) { | |
5b3715bf | 1182 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1183 | put_packet(s, buf); |
1184 | break; | |
1185 | } | |
1186 | if (len > (MAX_PACKET_LENGTH - 5) / 2) | |
1187 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
1188 | if (len < total_len - addr) { | |
1189 | buf[0] = 'm'; | |
1190 | len = memtox(buf + 1, xml + addr, len); | |
1191 | } else { | |
1192 | buf[0] = 'l'; | |
1193 | len = memtox(buf + 1, xml + addr, total_len - addr); | |
1194 | } | |
1195 | put_packet_binary(s, buf, len + 1); | |
1196 | break; | |
1197 | } | |
56aebc89 PB |
1198 | /* Unrecognised 'q' command. */ |
1199 | goto unknown_command; | |
1200 | ||
858693c6 | 1201 | default: |
56aebc89 | 1202 | unknown_command: |
858693c6 FB |
1203 | /* put empty packet */ |
1204 | buf[0] = '\0'; | |
1205 | put_packet(s, buf); | |
1206 | break; | |
1207 | } | |
1208 | return RS_IDLE; | |
1209 | } | |
1210 | ||
64f6b346 | 1211 | void gdb_set_stop_cpu(CPUState *cpu) |
880a7578 | 1212 | { |
2e0f2cfb AF |
1213 | gdbserver_state->c_cpu = cpu; |
1214 | gdbserver_state->g_cpu = cpu; | |
880a7578 AL |
1215 | } |
1216 | ||
1fddef4b | 1217 | #ifndef CONFIG_USER_ONLY |
1dfb4dd9 | 1218 | static void gdb_vm_state_change(void *opaque, int running, RunState state) |
858693c6 | 1219 | { |
880a7578 | 1220 | GDBState *s = gdbserver_state; |
2e0f2cfb AF |
1221 | CPUArchState *env = s->c_cpu->env_ptr; |
1222 | CPUState *cpu = s->c_cpu; | |
858693c6 | 1223 | char buf[256]; |
d6fc1b39 | 1224 | const char *type; |
858693c6 FB |
1225 | int ret; |
1226 | ||
cdb432b2 MI |
1227 | if (running || s->state == RS_INACTIVE) { |
1228 | return; | |
1229 | } | |
1230 | /* Is there a GDB syscall waiting to be sent? */ | |
1231 | if (s->current_syscall_cb) { | |
1232 | put_packet(s, s->syscall_buf); | |
a2d1ebaf | 1233 | return; |
e07bbac5 | 1234 | } |
1dfb4dd9 | 1235 | switch (state) { |
0461d5a6 | 1236 | case RUN_STATE_DEBUG: |
ff4700b0 AF |
1237 | if (cpu->watchpoint_hit) { |
1238 | switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) { | |
a1d1bb31 | 1239 | case BP_MEM_READ: |
d6fc1b39 AL |
1240 | type = "r"; |
1241 | break; | |
a1d1bb31 | 1242 | case BP_MEM_ACCESS: |
d6fc1b39 AL |
1243 | type = "a"; |
1244 | break; | |
1245 | default: | |
1246 | type = ""; | |
1247 | break; | |
1248 | } | |
880a7578 AL |
1249 | snprintf(buf, sizeof(buf), |
1250 | "T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";", | |
0d34282f | 1251 | GDB_SIGNAL_TRAP, cpu_index(cpu), type, |
ff4700b0 AF |
1252 | (target_ulong)cpu->watchpoint_hit->vaddr); |
1253 | cpu->watchpoint_hit = NULL; | |
425189a8 | 1254 | goto send_packet; |
6658ffb8 | 1255 | } |
425189a8 | 1256 | tb_flush(env); |
ca587a8e | 1257 | ret = GDB_SIGNAL_TRAP; |
425189a8 | 1258 | break; |
0461d5a6 | 1259 | case RUN_STATE_PAUSED: |
9781e040 | 1260 | ret = GDB_SIGNAL_INT; |
425189a8 | 1261 | break; |
0461d5a6 | 1262 | case RUN_STATE_SHUTDOWN: |
425189a8 JK |
1263 | ret = GDB_SIGNAL_QUIT; |
1264 | break; | |
0461d5a6 | 1265 | case RUN_STATE_IO_ERROR: |
425189a8 JK |
1266 | ret = GDB_SIGNAL_IO; |
1267 | break; | |
0461d5a6 | 1268 | case RUN_STATE_WATCHDOG: |
425189a8 JK |
1269 | ret = GDB_SIGNAL_ALRM; |
1270 | break; | |
0461d5a6 | 1271 | case RUN_STATE_INTERNAL_ERROR: |
425189a8 JK |
1272 | ret = GDB_SIGNAL_ABRT; |
1273 | break; | |
0461d5a6 LC |
1274 | case RUN_STATE_SAVE_VM: |
1275 | case RUN_STATE_RESTORE_VM: | |
425189a8 | 1276 | return; |
0461d5a6 | 1277 | case RUN_STATE_FINISH_MIGRATE: |
425189a8 JK |
1278 | ret = GDB_SIGNAL_XCPU; |
1279 | break; | |
1280 | default: | |
1281 | ret = GDB_SIGNAL_UNKNOWN; | |
1282 | break; | |
bbeb7b5c | 1283 | } |
0d34282f | 1284 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, cpu_index(cpu)); |
425189a8 JK |
1285 | |
1286 | send_packet: | |
858693c6 | 1287 | put_packet(s, buf); |
425189a8 JK |
1288 | |
1289 | /* disable single step if it was enabled */ | |
3825b28f | 1290 | cpu_single_step(cpu, 0); |
858693c6 | 1291 | } |
1fddef4b | 1292 | #endif |
858693c6 | 1293 | |
a2d1ebaf PB |
1294 | /* Send a gdb syscall request. |
1295 | This accepts limited printf-style format specifiers, specifically: | |
a87295e8 PB |
1296 | %x - target_ulong argument printed in hex. |
1297 | %lx - 64-bit argument printed in hex. | |
1298 | %s - string pointer (target_ulong) and length (int) pair. */ | |
7ccfb2eb | 1299 | void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
a2d1ebaf PB |
1300 | { |
1301 | va_list va; | |
a2d1ebaf | 1302 | char *p; |
cdb432b2 | 1303 | char *p_end; |
a2d1ebaf | 1304 | target_ulong addr; |
a87295e8 | 1305 | uint64_t i64; |
a2d1ebaf PB |
1306 | GDBState *s; |
1307 | ||
880a7578 | 1308 | s = gdbserver_state; |
a2d1ebaf PB |
1309 | if (!s) |
1310 | return; | |
cdb432b2 | 1311 | s->current_syscall_cb = cb; |
a2d1ebaf | 1312 | #ifndef CONFIG_USER_ONLY |
0461d5a6 | 1313 | vm_stop(RUN_STATE_DEBUG); |
a2d1ebaf | 1314 | #endif |
a2d1ebaf | 1315 | va_start(va, fmt); |
cdb432b2 MI |
1316 | p = s->syscall_buf; |
1317 | p_end = &s->syscall_buf[sizeof(s->syscall_buf)]; | |
a2d1ebaf PB |
1318 | *(p++) = 'F'; |
1319 | while (*fmt) { | |
1320 | if (*fmt == '%') { | |
1321 | fmt++; | |
1322 | switch (*fmt++) { | |
1323 | case 'x': | |
1324 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1325 | p += snprintf(p, p_end - p, TARGET_FMT_lx, addr); |
a2d1ebaf | 1326 | break; |
a87295e8 PB |
1327 | case 'l': |
1328 | if (*(fmt++) != 'x') | |
1329 | goto bad_format; | |
1330 | i64 = va_arg(va, uint64_t); | |
cdb432b2 | 1331 | p += snprintf(p, p_end - p, "%" PRIx64, i64); |
a87295e8 | 1332 | break; |
a2d1ebaf PB |
1333 | case 's': |
1334 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1335 | p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x", |
363a37d5 | 1336 | addr, va_arg(va, int)); |
a2d1ebaf PB |
1337 | break; |
1338 | default: | |
a87295e8 | 1339 | bad_format: |
a2d1ebaf PB |
1340 | fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n", |
1341 | fmt - 1); | |
1342 | break; | |
1343 | } | |
1344 | } else { | |
1345 | *(p++) = *(fmt++); | |
1346 | } | |
1347 | } | |
8a93e02a | 1348 | *p = 0; |
a2d1ebaf | 1349 | va_end(va); |
a2d1ebaf | 1350 | #ifdef CONFIG_USER_ONLY |
cdb432b2 | 1351 | put_packet(s, s->syscall_buf); |
2e0f2cfb | 1352 | gdb_handlesig(s->c_cpu, 0); |
a2d1ebaf | 1353 | #else |
cdb432b2 MI |
1354 | /* In this case wait to send the syscall packet until notification that |
1355 | the CPU has stopped. This must be done because if the packet is sent | |
1356 | now the reply from the syscall request could be received while the CPU | |
1357 | is still in the running state, which can cause packets to be dropped | |
1358 | and state transition 'T' packets to be sent while the syscall is still | |
1359 | being processed. */ | |
2e0f2cfb | 1360 | cpu_exit(s->c_cpu); |
a2d1ebaf PB |
1361 | #endif |
1362 | } | |
1363 | ||
6a00d601 | 1364 | static void gdb_read_byte(GDBState *s, int ch) |
858693c6 FB |
1365 | { |
1366 | int i, csum; | |
60fe76f3 | 1367 | uint8_t reply; |
858693c6 | 1368 | |
1fddef4b | 1369 | #ifndef CONFIG_USER_ONLY |
4046d913 PB |
1370 | if (s->last_packet_len) { |
1371 | /* Waiting for a response to the last packet. If we see the start | |
1372 | of a new command then abandon the previous response. */ | |
1373 | if (ch == '-') { | |
1374 | #ifdef DEBUG_GDB | |
1375 | printf("Got NACK, retransmitting\n"); | |
1376 | #endif | |
ffe8ab83 | 1377 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
4046d913 PB |
1378 | } |
1379 | #ifdef DEBUG_GDB | |
1380 | else if (ch == '+') | |
1381 | printf("Got ACK\n"); | |
1382 | else | |
1383 | printf("Got '%c' when expecting ACK/NACK\n", ch); | |
1384 | #endif | |
1385 | if (ch == '+' || ch == '$') | |
1386 | s->last_packet_len = 0; | |
1387 | if (ch != '$') | |
1388 | return; | |
1389 | } | |
1354869c | 1390 | if (runstate_is_running()) { |
858693c6 FB |
1391 | /* when the CPU is running, we cannot do anything except stop |
1392 | it when receiving a char */ | |
0461d5a6 | 1393 | vm_stop(RUN_STATE_PAUSED); |
5fafdf24 | 1394 | } else |
1fddef4b | 1395 | #endif |
41625033 | 1396 | { |
858693c6 FB |
1397 | switch(s->state) { |
1398 | case RS_IDLE: | |
1399 | if (ch == '$') { | |
1400 | s->line_buf_index = 0; | |
1401 | s->state = RS_GETLINE; | |
c33a346e | 1402 | } |
b4608c04 | 1403 | break; |
858693c6 FB |
1404 | case RS_GETLINE: |
1405 | if (ch == '#') { | |
1406 | s->state = RS_CHKSUM1; | |
1407 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { | |
1408 | s->state = RS_IDLE; | |
4c3a88a2 | 1409 | } else { |
858693c6 | 1410 | s->line_buf[s->line_buf_index++] = ch; |
4c3a88a2 FB |
1411 | } |
1412 | break; | |
858693c6 FB |
1413 | case RS_CHKSUM1: |
1414 | s->line_buf[s->line_buf_index] = '\0'; | |
1415 | s->line_csum = fromhex(ch) << 4; | |
1416 | s->state = RS_CHKSUM2; | |
1417 | break; | |
1418 | case RS_CHKSUM2: | |
1419 | s->line_csum |= fromhex(ch); | |
1420 | csum = 0; | |
1421 | for(i = 0; i < s->line_buf_index; i++) { | |
1422 | csum += s->line_buf[i]; | |
1423 | } | |
1424 | if (s->line_csum != (csum & 0xff)) { | |
60fe76f3 TS |
1425 | reply = '-'; |
1426 | put_buffer(s, &reply, 1); | |
858693c6 | 1427 | s->state = RS_IDLE; |
4c3a88a2 | 1428 | } else { |
60fe76f3 TS |
1429 | reply = '+'; |
1430 | put_buffer(s, &reply, 1); | |
880a7578 | 1431 | s->state = gdb_handle_packet(s, s->line_buf); |
4c3a88a2 FB |
1432 | } |
1433 | break; | |
a2d1ebaf PB |
1434 | default: |
1435 | abort(); | |
858693c6 FB |
1436 | } |
1437 | } | |
1438 | } | |
1439 | ||
0e1c9c54 | 1440 | /* Tell the remote gdb that the process has exited. */ |
9349b4f9 | 1441 | void gdb_exit(CPUArchState *env, int code) |
0e1c9c54 PB |
1442 | { |
1443 | GDBState *s; | |
1444 | char buf[4]; | |
1445 | ||
1446 | s = gdbserver_state; | |
1447 | if (!s) { | |
1448 | return; | |
1449 | } | |
1450 | #ifdef CONFIG_USER_ONLY | |
1451 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1452 | return; | |
1453 | } | |
3d0f4418 PB |
1454 | #else |
1455 | if (!s->chr) { | |
1456 | return; | |
1457 | } | |
0e1c9c54 PB |
1458 | #endif |
1459 | ||
1460 | snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code); | |
1461 | put_packet(s, buf); | |
e2af15b2 FC |
1462 | |
1463 | #ifndef CONFIG_USER_ONLY | |
3d0f4418 | 1464 | qemu_chr_delete(s->chr); |
e2af15b2 | 1465 | #endif |
0e1c9c54 PB |
1466 | } |
1467 | ||
1fddef4b | 1468 | #ifdef CONFIG_USER_ONLY |
ca587a8e AJ |
1469 | int |
1470 | gdb_queuesig (void) | |
1471 | { | |
1472 | GDBState *s; | |
1473 | ||
1474 | s = gdbserver_state; | |
1475 | ||
1476 | if (gdbserver_fd < 0 || s->fd < 0) | |
1477 | return 0; | |
1478 | else | |
1479 | return 1; | |
1480 | } | |
1481 | ||
1fddef4b | 1482 | int |
db6b81d4 | 1483 | gdb_handlesig(CPUState *cpu, int sig) |
1fddef4b | 1484 | { |
db6b81d4 | 1485 | CPUArchState *env = cpu->env_ptr; |
5ca666c7 AF |
1486 | GDBState *s; |
1487 | char buf[256]; | |
1488 | int n; | |
1fddef4b | 1489 | |
5ca666c7 AF |
1490 | s = gdbserver_state; |
1491 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1492 | return sig; | |
1493 | } | |
1fddef4b | 1494 | |
5ca666c7 | 1495 | /* disable single step if it was enabled */ |
3825b28f | 1496 | cpu_single_step(cpu, 0); |
5ca666c7 | 1497 | tb_flush(env); |
1fddef4b | 1498 | |
5ca666c7 AF |
1499 | if (sig != 0) { |
1500 | snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); | |
1501 | put_packet(s, buf); | |
1502 | } | |
1503 | /* put_packet() might have detected that the peer terminated the | |
1504 | connection. */ | |
1505 | if (s->fd < 0) { | |
1506 | return sig; | |
1507 | } | |
1fddef4b | 1508 | |
5ca666c7 AF |
1509 | sig = 0; |
1510 | s->state = RS_IDLE; | |
1511 | s->running_state = 0; | |
1512 | while (s->running_state == 0) { | |
1513 | n = read(s->fd, buf, 256); | |
1514 | if (n > 0) { | |
1515 | int i; | |
1516 | ||
1517 | for (i = 0; i < n; i++) { | |
1518 | gdb_read_byte(s, buf[i]); | |
1519 | } | |
1520 | } else if (n == 0 || errno != EAGAIN) { | |
1521 | /* XXX: Connection closed. Should probably wait for another | |
1522 | connection before continuing. */ | |
1523 | return sig; | |
1fddef4b | 1524 | } |
5ca666c7 AF |
1525 | } |
1526 | sig = s->signal; | |
1527 | s->signal = 0; | |
1528 | return sig; | |
1fddef4b | 1529 | } |
e9009676 | 1530 | |
ca587a8e | 1531 | /* Tell the remote gdb that the process has exited due to SIG. */ |
9349b4f9 | 1532 | void gdb_signalled(CPUArchState *env, int sig) |
ca587a8e | 1533 | { |
5ca666c7 AF |
1534 | GDBState *s; |
1535 | char buf[4]; | |
ca587a8e | 1536 | |
5ca666c7 AF |
1537 | s = gdbserver_state; |
1538 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1539 | return; | |
1540 | } | |
ca587a8e | 1541 | |
5ca666c7 AF |
1542 | snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig)); |
1543 | put_packet(s, buf); | |
ca587a8e | 1544 | } |
1fddef4b | 1545 | |
880a7578 | 1546 | static void gdb_accept(void) |
858693c6 FB |
1547 | { |
1548 | GDBState *s; | |
1549 | struct sockaddr_in sockaddr; | |
1550 | socklen_t len; | |
bf1c852a | 1551 | int fd; |
858693c6 FB |
1552 | |
1553 | for(;;) { | |
1554 | len = sizeof(sockaddr); | |
1555 | fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len); | |
1556 | if (fd < 0 && errno != EINTR) { | |
1557 | perror("accept"); | |
1558 | return; | |
1559 | } else if (fd >= 0) { | |
40ff6d7e KW |
1560 | #ifndef _WIN32 |
1561 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
1562 | #endif | |
b4608c04 FB |
1563 | break; |
1564 | } | |
1565 | } | |
858693c6 FB |
1566 | |
1567 | /* set short latency */ | |
bf1c852a | 1568 | socket_set_nodelay(fd); |
3b46e624 | 1569 | |
7267c094 | 1570 | s = g_malloc0(sizeof(GDBState)); |
2e0f2cfb AF |
1571 | s->c_cpu = first_cpu; |
1572 | s->g_cpu = first_cpu; | |
858693c6 | 1573 | s->fd = fd; |
5b50e790 | 1574 | gdb_has_xml = false; |
858693c6 | 1575 | |
880a7578 | 1576 | gdbserver_state = s; |
a2d1ebaf | 1577 | |
858693c6 | 1578 | fcntl(fd, F_SETFL, O_NONBLOCK); |
858693c6 FB |
1579 | } |
1580 | ||
1581 | static int gdbserver_open(int port) | |
1582 | { | |
1583 | struct sockaddr_in sockaddr; | |
6669ca13 | 1584 | int fd, ret; |
858693c6 FB |
1585 | |
1586 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
1587 | if (fd < 0) { | |
1588 | perror("socket"); | |
1589 | return -1; | |
1590 | } | |
40ff6d7e KW |
1591 | #ifndef _WIN32 |
1592 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
1593 | #endif | |
858693c6 | 1594 | |
6669ca13 | 1595 | socket_set_fast_reuse(fd); |
858693c6 FB |
1596 | |
1597 | sockaddr.sin_family = AF_INET; | |
1598 | sockaddr.sin_port = htons(port); | |
1599 | sockaddr.sin_addr.s_addr = 0; | |
1600 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
1601 | if (ret < 0) { | |
1602 | perror("bind"); | |
bb16172c | 1603 | close(fd); |
858693c6 FB |
1604 | return -1; |
1605 | } | |
1606 | ret = listen(fd, 0); | |
1607 | if (ret < 0) { | |
1608 | perror("listen"); | |
bb16172c | 1609 | close(fd); |
858693c6 FB |
1610 | return -1; |
1611 | } | |
858693c6 FB |
1612 | return fd; |
1613 | } | |
1614 | ||
1615 | int gdbserver_start(int port) | |
1616 | { | |
1617 | gdbserver_fd = gdbserver_open(port); | |
1618 | if (gdbserver_fd < 0) | |
1619 | return -1; | |
1620 | /* accept connections */ | |
880a7578 | 1621 | gdb_accept(); |
4046d913 PB |
1622 | return 0; |
1623 | } | |
2b1319c8 AJ |
1624 | |
1625 | /* Disable gdb stub for child processes. */ | |
9349b4f9 | 1626 | void gdbserver_fork(CPUArchState *env) |
2b1319c8 | 1627 | { |
75a34036 | 1628 | CPUState *cpu = ENV_GET_CPU(env); |
2b1319c8 | 1629 | GDBState *s = gdbserver_state; |
75a34036 AF |
1630 | |
1631 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1632 | return; | |
1633 | } | |
2b1319c8 AJ |
1634 | close(s->fd); |
1635 | s->fd = -1; | |
b3310ab3 | 1636 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
75a34036 | 1637 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
2b1319c8 | 1638 | } |
1fddef4b | 1639 | #else |
aa1f17c1 | 1640 | static int gdb_chr_can_receive(void *opaque) |
4046d913 | 1641 | { |
56aebc89 PB |
1642 | /* We can handle an arbitrarily large amount of data. |
1643 | Pick the maximum packet size, which is as good as anything. */ | |
1644 | return MAX_PACKET_LENGTH; | |
4046d913 PB |
1645 | } |
1646 | ||
aa1f17c1 | 1647 | static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
4046d913 | 1648 | { |
4046d913 PB |
1649 | int i; |
1650 | ||
1651 | for (i = 0; i < size; i++) { | |
880a7578 | 1652 | gdb_read_byte(gdbserver_state, buf[i]); |
4046d913 PB |
1653 | } |
1654 | } | |
1655 | ||
1656 | static void gdb_chr_event(void *opaque, int event) | |
1657 | { | |
1658 | switch (event) { | |
b6b8df56 | 1659 | case CHR_EVENT_OPENED: |
0461d5a6 | 1660 | vm_stop(RUN_STATE_PAUSED); |
5b50e790 | 1661 | gdb_has_xml = false; |
4046d913 PB |
1662 | break; |
1663 | default: | |
1664 | break; | |
1665 | } | |
1666 | } | |
1667 | ||
8a34a0fb AL |
1668 | static void gdb_monitor_output(GDBState *s, const char *msg, int len) |
1669 | { | |
1670 | char buf[MAX_PACKET_LENGTH]; | |
1671 | ||
1672 | buf[0] = 'O'; | |
1673 | if (len > (MAX_PACKET_LENGTH/2) - 1) | |
1674 | len = (MAX_PACKET_LENGTH/2) - 1; | |
1675 | memtohex(buf + 1, (uint8_t *)msg, len); | |
1676 | put_packet(s, buf); | |
1677 | } | |
1678 | ||
1679 | static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len) | |
1680 | { | |
1681 | const char *p = (const char *)buf; | |
1682 | int max_sz; | |
1683 | ||
1684 | max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2; | |
1685 | for (;;) { | |
1686 | if (len <= max_sz) { | |
1687 | gdb_monitor_output(gdbserver_state, p, len); | |
1688 | break; | |
1689 | } | |
1690 | gdb_monitor_output(gdbserver_state, p, max_sz); | |
1691 | p += max_sz; | |
1692 | len -= max_sz; | |
1693 | } | |
1694 | return len; | |
1695 | } | |
1696 | ||
59030a8c AL |
1697 | #ifndef _WIN32 |
1698 | static void gdb_sigterm_handler(int signal) | |
1699 | { | |
1354869c | 1700 | if (runstate_is_running()) { |
0461d5a6 | 1701 | vm_stop(RUN_STATE_PAUSED); |
e07bbac5 | 1702 | } |
59030a8c AL |
1703 | } |
1704 | #endif | |
1705 | ||
1706 | int gdbserver_start(const char *device) | |
4046d913 PB |
1707 | { |
1708 | GDBState *s; | |
59030a8c | 1709 | char gdbstub_device_name[128]; |
36556b20 AL |
1710 | CharDriverState *chr = NULL; |
1711 | CharDriverState *mon_chr; | |
cfc3475a | 1712 | |
59030a8c AL |
1713 | if (!device) |
1714 | return -1; | |
1715 | if (strcmp(device, "none") != 0) { | |
1716 | if (strstart(device, "tcp:", NULL)) { | |
1717 | /* enforce required TCP attributes */ | |
1718 | snprintf(gdbstub_device_name, sizeof(gdbstub_device_name), | |
1719 | "%s,nowait,nodelay,server", device); | |
1720 | device = gdbstub_device_name; | |
36556b20 | 1721 | } |
59030a8c AL |
1722 | #ifndef _WIN32 |
1723 | else if (strcmp(device, "stdio") == 0) { | |
1724 | struct sigaction act; | |
4046d913 | 1725 | |
59030a8c AL |
1726 | memset(&act, 0, sizeof(act)); |
1727 | act.sa_handler = gdb_sigterm_handler; | |
1728 | sigaction(SIGINT, &act, NULL); | |
1729 | } | |
1730 | #endif | |
27143a44 | 1731 | chr = qemu_chr_new("gdb", device, NULL); |
36556b20 AL |
1732 | if (!chr) |
1733 | return -1; | |
1734 | ||
456d6069 | 1735 | qemu_chr_fe_claim_no_fail(chr); |
36556b20 AL |
1736 | qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive, |
1737 | gdb_chr_event, NULL); | |
cfc3475a PB |
1738 | } |
1739 | ||
36556b20 AL |
1740 | s = gdbserver_state; |
1741 | if (!s) { | |
7267c094 | 1742 | s = g_malloc0(sizeof(GDBState)); |
36556b20 | 1743 | gdbserver_state = s; |
4046d913 | 1744 | |
36556b20 AL |
1745 | qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL); |
1746 | ||
1747 | /* Initialize a monitor terminal for gdb */ | |
462efe9e | 1748 | mon_chr = qemu_chr_alloc(); |
36556b20 AL |
1749 | mon_chr->chr_write = gdb_monitor_write; |
1750 | monitor_init(mon_chr, 0); | |
1751 | } else { | |
1752 | if (s->chr) | |
70f24fb6 | 1753 | qemu_chr_delete(s->chr); |
36556b20 AL |
1754 | mon_chr = s->mon_chr; |
1755 | memset(s, 0, sizeof(GDBState)); | |
1756 | } | |
2e0f2cfb AF |
1757 | s->c_cpu = first_cpu; |
1758 | s->g_cpu = first_cpu; | |
4046d913 | 1759 | s->chr = chr; |
36556b20 AL |
1760 | s->state = chr ? RS_IDLE : RS_INACTIVE; |
1761 | s->mon_chr = mon_chr; | |
cdb432b2 | 1762 | s->current_syscall_cb = NULL; |
8a34a0fb | 1763 | |
b4608c04 FB |
1764 | return 0; |
1765 | } | |
4046d913 | 1766 | #endif |