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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 | */ |
d38ea87a | 19 | #include "qemu/osdep.h" |
da34e65c | 20 | #include "qapi/error.h" |
508b4ecc | 21 | #include "qemu/error-report.h" |
f348b6d1 | 22 | #include "qemu/cutils.h" |
33c11879 | 23 | #include "cpu.h" |
f348b6d1 | 24 | #ifdef CONFIG_USER_ONLY |
1fddef4b FB |
25 | #include "qemu.h" |
26 | #else | |
83c9089e | 27 | #include "monitor/monitor.h" |
8228e353 | 28 | #include "chardev/char.h" |
4d43a603 | 29 | #include "chardev/char-fe.h" |
9c17d615 | 30 | #include "sysemu/sysemu.h" |
022c62cb | 31 | #include "exec/gdbstub.h" |
1fddef4b | 32 | #endif |
67b915a5 | 33 | |
56aebc89 PB |
34 | #define MAX_PACKET_LENGTH 4096 |
35 | ||
1de7afc9 | 36 | #include "qemu/sockets.h" |
b3946626 | 37 | #include "sysemu/hw_accel.h" |
9c17d615 | 38 | #include "sysemu/kvm.h" |
cfe67cef | 39 | #include "exec/semihost.h" |
63c91552 | 40 | #include "exec/exec-all.h" |
ca587a8e | 41 | |
a3919386 JK |
42 | #ifdef CONFIG_USER_ONLY |
43 | #define GDB_ATTACHED "0" | |
44 | #else | |
45 | #define GDB_ATTACHED "1" | |
46 | #endif | |
47 | ||
f3659eee AF |
48 | static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, |
49 | uint8_t *buf, int len, bool is_write) | |
44520db1 | 50 | { |
f3659eee AF |
51 | CPUClass *cc = CPU_GET_CLASS(cpu); |
52 | ||
53 | if (cc->memory_rw_debug) { | |
54 | return cc->memory_rw_debug(cpu, addr, buf, len, is_write); | |
55 | } | |
56 | return cpu_memory_rw_debug(cpu, addr, buf, len, is_write); | |
44520db1 | 57 | } |
ca587a8e AJ |
58 | |
59 | enum { | |
60 | GDB_SIGNAL_0 = 0, | |
61 | GDB_SIGNAL_INT = 2, | |
425189a8 | 62 | GDB_SIGNAL_QUIT = 3, |
ca587a8e | 63 | GDB_SIGNAL_TRAP = 5, |
425189a8 JK |
64 | GDB_SIGNAL_ABRT = 6, |
65 | GDB_SIGNAL_ALRM = 14, | |
66 | GDB_SIGNAL_IO = 23, | |
67 | GDB_SIGNAL_XCPU = 24, | |
ca587a8e AJ |
68 | GDB_SIGNAL_UNKNOWN = 143 |
69 | }; | |
70 | ||
71 | #ifdef CONFIG_USER_ONLY | |
72 | ||
73 | /* Map target signal numbers to GDB protocol signal numbers and vice | |
74 | * versa. For user emulation's currently supported systems, we can | |
75 | * assume most signals are defined. | |
76 | */ | |
77 | ||
78 | static int gdb_signal_table[] = { | |
79 | 0, | |
80 | TARGET_SIGHUP, | |
81 | TARGET_SIGINT, | |
82 | TARGET_SIGQUIT, | |
83 | TARGET_SIGILL, | |
84 | TARGET_SIGTRAP, | |
85 | TARGET_SIGABRT, | |
86 | -1, /* SIGEMT */ | |
87 | TARGET_SIGFPE, | |
88 | TARGET_SIGKILL, | |
89 | TARGET_SIGBUS, | |
90 | TARGET_SIGSEGV, | |
91 | TARGET_SIGSYS, | |
92 | TARGET_SIGPIPE, | |
93 | TARGET_SIGALRM, | |
94 | TARGET_SIGTERM, | |
95 | TARGET_SIGURG, | |
96 | TARGET_SIGSTOP, | |
97 | TARGET_SIGTSTP, | |
98 | TARGET_SIGCONT, | |
99 | TARGET_SIGCHLD, | |
100 | TARGET_SIGTTIN, | |
101 | TARGET_SIGTTOU, | |
102 | TARGET_SIGIO, | |
103 | TARGET_SIGXCPU, | |
104 | TARGET_SIGXFSZ, | |
105 | TARGET_SIGVTALRM, | |
106 | TARGET_SIGPROF, | |
107 | TARGET_SIGWINCH, | |
108 | -1, /* SIGLOST */ | |
109 | TARGET_SIGUSR1, | |
110 | TARGET_SIGUSR2, | |
c72d5bf8 | 111 | #ifdef TARGET_SIGPWR |
ca587a8e | 112 | TARGET_SIGPWR, |
c72d5bf8 BS |
113 | #else |
114 | -1, | |
115 | #endif | |
ca587a8e AJ |
116 | -1, /* SIGPOLL */ |
117 | -1, | |
118 | -1, | |
119 | -1, | |
120 | -1, | |
121 | -1, | |
122 | -1, | |
123 | -1, | |
124 | -1, | |
125 | -1, | |
126 | -1, | |
127 | -1, | |
c72d5bf8 | 128 | #ifdef __SIGRTMIN |
ca587a8e AJ |
129 | __SIGRTMIN + 1, |
130 | __SIGRTMIN + 2, | |
131 | __SIGRTMIN + 3, | |
132 | __SIGRTMIN + 4, | |
133 | __SIGRTMIN + 5, | |
134 | __SIGRTMIN + 6, | |
135 | __SIGRTMIN + 7, | |
136 | __SIGRTMIN + 8, | |
137 | __SIGRTMIN + 9, | |
138 | __SIGRTMIN + 10, | |
139 | __SIGRTMIN + 11, | |
140 | __SIGRTMIN + 12, | |
141 | __SIGRTMIN + 13, | |
142 | __SIGRTMIN + 14, | |
143 | __SIGRTMIN + 15, | |
144 | __SIGRTMIN + 16, | |
145 | __SIGRTMIN + 17, | |
146 | __SIGRTMIN + 18, | |
147 | __SIGRTMIN + 19, | |
148 | __SIGRTMIN + 20, | |
149 | __SIGRTMIN + 21, | |
150 | __SIGRTMIN + 22, | |
151 | __SIGRTMIN + 23, | |
152 | __SIGRTMIN + 24, | |
153 | __SIGRTMIN + 25, | |
154 | __SIGRTMIN + 26, | |
155 | __SIGRTMIN + 27, | |
156 | __SIGRTMIN + 28, | |
157 | __SIGRTMIN + 29, | |
158 | __SIGRTMIN + 30, | |
159 | __SIGRTMIN + 31, | |
160 | -1, /* SIGCANCEL */ | |
161 | __SIGRTMIN, | |
162 | __SIGRTMIN + 32, | |
163 | __SIGRTMIN + 33, | |
164 | __SIGRTMIN + 34, | |
165 | __SIGRTMIN + 35, | |
166 | __SIGRTMIN + 36, | |
167 | __SIGRTMIN + 37, | |
168 | __SIGRTMIN + 38, | |
169 | __SIGRTMIN + 39, | |
170 | __SIGRTMIN + 40, | |
171 | __SIGRTMIN + 41, | |
172 | __SIGRTMIN + 42, | |
173 | __SIGRTMIN + 43, | |
174 | __SIGRTMIN + 44, | |
175 | __SIGRTMIN + 45, | |
176 | __SIGRTMIN + 46, | |
177 | __SIGRTMIN + 47, | |
178 | __SIGRTMIN + 48, | |
179 | __SIGRTMIN + 49, | |
180 | __SIGRTMIN + 50, | |
181 | __SIGRTMIN + 51, | |
182 | __SIGRTMIN + 52, | |
183 | __SIGRTMIN + 53, | |
184 | __SIGRTMIN + 54, | |
185 | __SIGRTMIN + 55, | |
186 | __SIGRTMIN + 56, | |
187 | __SIGRTMIN + 57, | |
188 | __SIGRTMIN + 58, | |
189 | __SIGRTMIN + 59, | |
190 | __SIGRTMIN + 60, | |
191 | __SIGRTMIN + 61, | |
192 | __SIGRTMIN + 62, | |
193 | __SIGRTMIN + 63, | |
194 | __SIGRTMIN + 64, | |
195 | __SIGRTMIN + 65, | |
196 | __SIGRTMIN + 66, | |
197 | __SIGRTMIN + 67, | |
198 | __SIGRTMIN + 68, | |
199 | __SIGRTMIN + 69, | |
200 | __SIGRTMIN + 70, | |
201 | __SIGRTMIN + 71, | |
202 | __SIGRTMIN + 72, | |
203 | __SIGRTMIN + 73, | |
204 | __SIGRTMIN + 74, | |
205 | __SIGRTMIN + 75, | |
206 | __SIGRTMIN + 76, | |
207 | __SIGRTMIN + 77, | |
208 | __SIGRTMIN + 78, | |
209 | __SIGRTMIN + 79, | |
210 | __SIGRTMIN + 80, | |
211 | __SIGRTMIN + 81, | |
212 | __SIGRTMIN + 82, | |
213 | __SIGRTMIN + 83, | |
214 | __SIGRTMIN + 84, | |
215 | __SIGRTMIN + 85, | |
216 | __SIGRTMIN + 86, | |
217 | __SIGRTMIN + 87, | |
218 | __SIGRTMIN + 88, | |
219 | __SIGRTMIN + 89, | |
220 | __SIGRTMIN + 90, | |
221 | __SIGRTMIN + 91, | |
222 | __SIGRTMIN + 92, | |
223 | __SIGRTMIN + 93, | |
224 | __SIGRTMIN + 94, | |
225 | __SIGRTMIN + 95, | |
226 | -1, /* SIGINFO */ | |
227 | -1, /* UNKNOWN */ | |
228 | -1, /* DEFAULT */ | |
229 | -1, | |
230 | -1, | |
231 | -1, | |
232 | -1, | |
233 | -1, | |
234 | -1 | |
c72d5bf8 | 235 | #endif |
ca587a8e | 236 | }; |
8f447cc7 | 237 | #else |
ca587a8e AJ |
238 | /* In system mode we only need SIGINT and SIGTRAP; other signals |
239 | are not yet supported. */ | |
240 | ||
241 | enum { | |
242 | TARGET_SIGINT = 2, | |
243 | TARGET_SIGTRAP = 5 | |
244 | }; | |
245 | ||
246 | static int gdb_signal_table[] = { | |
247 | -1, | |
248 | -1, | |
249 | TARGET_SIGINT, | |
250 | -1, | |
251 | -1, | |
252 | TARGET_SIGTRAP | |
253 | }; | |
254 | #endif | |
255 | ||
256 | #ifdef CONFIG_USER_ONLY | |
257 | static int target_signal_to_gdb (int sig) | |
258 | { | |
259 | int i; | |
260 | for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++) | |
261 | if (gdb_signal_table[i] == sig) | |
262 | return i; | |
263 | return GDB_SIGNAL_UNKNOWN; | |
264 | } | |
8f447cc7 | 265 | #endif |
b4608c04 | 266 | |
ca587a8e AJ |
267 | static int gdb_signal_to_target (int sig) |
268 | { | |
269 | if (sig < ARRAY_SIZE (gdb_signal_table)) | |
270 | return gdb_signal_table[sig]; | |
271 | else | |
272 | return -1; | |
273 | } | |
274 | ||
118e2268 AB |
275 | /* #define DEBUG_GDB */ |
276 | ||
277 | #ifdef DEBUG_GDB | |
278 | # define DEBUG_GDB_GATE 1 | |
279 | #else | |
280 | # define DEBUG_GDB_GATE 0 | |
281 | #endif | |
282 | ||
283 | #define gdb_debug(fmt, ...) do { \ | |
284 | if (DEBUG_GDB_GATE) { \ | |
285 | fprintf(stderr, "%s: " fmt, __func__, ## __VA_ARGS__); \ | |
286 | } \ | |
287 | } while (0) | |
288 | ||
b4608c04 | 289 | |
56aebc89 PB |
290 | typedef struct GDBRegisterState { |
291 | int base_reg; | |
292 | int num_regs; | |
293 | gdb_reg_cb get_reg; | |
294 | gdb_reg_cb set_reg; | |
295 | const char *xml; | |
296 | struct GDBRegisterState *next; | |
297 | } GDBRegisterState; | |
298 | ||
858693c6 | 299 | enum RSState { |
36556b20 | 300 | RS_INACTIVE, |
858693c6 FB |
301 | RS_IDLE, |
302 | RS_GETLINE, | |
4bf43122 DG |
303 | RS_GETLINE_ESC, |
304 | RS_GETLINE_RLE, | |
858693c6 FB |
305 | RS_CHKSUM1, |
306 | RS_CHKSUM2, | |
307 | }; | |
858693c6 | 308 | typedef struct GDBState { |
2e0f2cfb AF |
309 | CPUState *c_cpu; /* current CPU for step/continue ops */ |
310 | CPUState *g_cpu; /* current CPU for other ops */ | |
52f34623 | 311 | CPUState *query_cpu; /* for q{f|s}ThreadInfo */ |
41625033 | 312 | enum RSState state; /* parsing state */ |
56aebc89 | 313 | char line_buf[MAX_PACKET_LENGTH]; |
858693c6 | 314 | int line_buf_index; |
4bf43122 DG |
315 | int line_sum; /* running checksum */ |
316 | int line_csum; /* checksum at the end of the packet */ | |
56aebc89 | 317 | uint8_t last_packet[MAX_PACKET_LENGTH + 4]; |
4046d913 | 318 | int last_packet_len; |
1f487ee9 | 319 | int signal; |
41625033 | 320 | #ifdef CONFIG_USER_ONLY |
4046d913 | 321 | int fd; |
41625033 | 322 | int running_state; |
4046d913 | 323 | #else |
32a6ebec | 324 | CharBackend chr; |
0ec7b3e7 | 325 | Chardev *mon_chr; |
41625033 | 326 | #endif |
cdb432b2 MI |
327 | char syscall_buf[256]; |
328 | gdb_syscall_complete_cb current_syscall_cb; | |
858693c6 | 329 | } GDBState; |
b4608c04 | 330 | |
60897d36 EI |
331 | /* By default use no IRQs and no timers while single stepping so as to |
332 | * make single stepping like an ICE HW step. | |
333 | */ | |
334 | static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; | |
335 | ||
880a7578 AL |
336 | static GDBState *gdbserver_state; |
337 | ||
5b50e790 | 338 | bool gdb_has_xml; |
56aebc89 | 339 | |
1fddef4b | 340 | #ifdef CONFIG_USER_ONLY |
4046d913 PB |
341 | /* XXX: This is not thread safe. Do we care? */ |
342 | static int gdbserver_fd = -1; | |
343 | ||
858693c6 | 344 | static int get_char(GDBState *s) |
b4608c04 FB |
345 | { |
346 | uint8_t ch; | |
347 | int ret; | |
348 | ||
349 | for(;;) { | |
00aa0040 | 350 | ret = qemu_recv(s->fd, &ch, 1, 0); |
b4608c04 | 351 | if (ret < 0) { |
1f487ee9 EI |
352 | if (errno == ECONNRESET) |
353 | s->fd = -1; | |
5819e3e0 | 354 | if (errno != EINTR) |
b4608c04 FB |
355 | return -1; |
356 | } else if (ret == 0) { | |
1f487ee9 EI |
357 | close(s->fd); |
358 | s->fd = -1; | |
b4608c04 FB |
359 | return -1; |
360 | } else { | |
361 | break; | |
362 | } | |
363 | } | |
364 | return ch; | |
365 | } | |
4046d913 | 366 | #endif |
b4608c04 | 367 | |
654efcf3 | 368 | static enum { |
a2d1ebaf PB |
369 | GDB_SYS_UNKNOWN, |
370 | GDB_SYS_ENABLED, | |
371 | GDB_SYS_DISABLED, | |
372 | } gdb_syscall_mode; | |
373 | ||
a38bb079 | 374 | /* Decide if either remote gdb syscalls or native file IO should be used. */ |
a2d1ebaf PB |
375 | int use_gdb_syscalls(void) |
376 | { | |
cfe67cef LA |
377 | SemihostingTarget target = semihosting_get_target(); |
378 | if (target == SEMIHOSTING_TARGET_NATIVE) { | |
a38bb079 LI |
379 | /* -semihosting-config target=native */ |
380 | return false; | |
cfe67cef | 381 | } else if (target == SEMIHOSTING_TARGET_GDB) { |
a38bb079 LI |
382 | /* -semihosting-config target=gdb */ |
383 | return true; | |
384 | } | |
385 | ||
386 | /* -semihosting-config target=auto */ | |
387 | /* On the first call check if gdb is connected and remember. */ | |
a2d1ebaf | 388 | if (gdb_syscall_mode == GDB_SYS_UNKNOWN) { |
880a7578 AL |
389 | gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED |
390 | : GDB_SYS_DISABLED); | |
a2d1ebaf PB |
391 | } |
392 | return gdb_syscall_mode == GDB_SYS_ENABLED; | |
393 | } | |
394 | ||
ba70a624 EI |
395 | /* Resume execution. */ |
396 | static inline void gdb_continue(GDBState *s) | |
397 | { | |
398 | #ifdef CONFIG_USER_ONLY | |
399 | s->running_state = 1; | |
400 | #else | |
26ac7a31 | 401 | if (!runstate_needs_reset()) { |
87f25c12 PB |
402 | vm_start(); |
403 | } | |
ba70a624 EI |
404 | #endif |
405 | } | |
406 | ||
544177ad CI |
407 | /* |
408 | * Resume execution, per CPU actions. For user-mode emulation it's | |
409 | * equivalent to gdb_continue. | |
410 | */ | |
411 | static int gdb_continue_partial(GDBState *s, char *newstates) | |
412 | { | |
413 | CPUState *cpu; | |
414 | int res = 0; | |
415 | #ifdef CONFIG_USER_ONLY | |
416 | /* | |
417 | * This is not exactly accurate, but it's an improvement compared to the | |
418 | * previous situation, where only one CPU would be single-stepped. | |
419 | */ | |
420 | CPU_FOREACH(cpu) { | |
421 | if (newstates[cpu->cpu_index] == 's') { | |
422 | cpu_single_step(cpu, sstep_flags); | |
423 | } | |
424 | } | |
425 | s->running_state = 1; | |
426 | #else | |
427 | int flag = 0; | |
428 | ||
429 | if (!runstate_needs_reset()) { | |
430 | if (vm_prepare_start()) { | |
431 | return 0; | |
432 | } | |
433 | ||
434 | CPU_FOREACH(cpu) { | |
435 | switch (newstates[cpu->cpu_index]) { | |
436 | case 0: | |
437 | case 1: | |
438 | break; /* nothing to do here */ | |
439 | case 's': | |
440 | cpu_single_step(cpu, sstep_flags); | |
441 | cpu_resume(cpu); | |
442 | flag = 1; | |
443 | break; | |
444 | case 'c': | |
445 | cpu_resume(cpu); | |
446 | flag = 1; | |
447 | break; | |
448 | default: | |
449 | res = -1; | |
450 | break; | |
451 | } | |
452 | } | |
453 | } | |
454 | if (flag) { | |
455 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); | |
456 | } | |
457 | #endif | |
458 | return res; | |
459 | } | |
460 | ||
858693c6 | 461 | static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
b4608c04 | 462 | { |
4046d913 | 463 | #ifdef CONFIG_USER_ONLY |
b4608c04 FB |
464 | int ret; |
465 | ||
466 | while (len > 0) { | |
8f447cc7 | 467 | ret = send(s->fd, buf, len, 0); |
b4608c04 | 468 | if (ret < 0) { |
5819e3e0 | 469 | if (errno != EINTR) |
b4608c04 FB |
470 | return; |
471 | } else { | |
472 | buf += ret; | |
473 | len -= ret; | |
474 | } | |
475 | } | |
4046d913 | 476 | #else |
6ab3fc32 DB |
477 | /* XXX this blocks entire thread. Rewrite to use |
478 | * qemu_chr_fe_write and background I/O callbacks */ | |
5345fdb4 | 479 | qemu_chr_fe_write_all(&s->chr, buf, len); |
4046d913 | 480 | #endif |
b4608c04 FB |
481 | } |
482 | ||
483 | static inline int fromhex(int v) | |
484 | { | |
485 | if (v >= '0' && v <= '9') | |
486 | return v - '0'; | |
487 | else if (v >= 'A' && v <= 'F') | |
488 | return v - 'A' + 10; | |
489 | else if (v >= 'a' && v <= 'f') | |
490 | return v - 'a' + 10; | |
491 | else | |
492 | return 0; | |
493 | } | |
494 | ||
495 | static inline int tohex(int v) | |
496 | { | |
497 | if (v < 10) | |
498 | return v + '0'; | |
499 | else | |
500 | return v - 10 + 'a'; | |
501 | } | |
502 | ||
503 | static void memtohex(char *buf, const uint8_t *mem, int len) | |
504 | { | |
505 | int i, c; | |
506 | char *q; | |
507 | q = buf; | |
508 | for(i = 0; i < len; i++) { | |
509 | c = mem[i]; | |
510 | *q++ = tohex(c >> 4); | |
511 | *q++ = tohex(c & 0xf); | |
512 | } | |
513 | *q = '\0'; | |
514 | } | |
515 | ||
516 | static void hextomem(uint8_t *mem, const char *buf, int len) | |
517 | { | |
518 | int i; | |
519 | ||
520 | for(i = 0; i < len; i++) { | |
521 | mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); | |
522 | buf += 2; | |
523 | } | |
524 | } | |
525 | ||
b4608c04 | 526 | /* return -1 if error, 0 if OK */ |
56aebc89 | 527 | static int put_packet_binary(GDBState *s, const char *buf, int len) |
b4608c04 | 528 | { |
56aebc89 | 529 | int csum, i; |
60fe76f3 | 530 | uint8_t *p; |
b4608c04 | 531 | |
b4608c04 | 532 | for(;;) { |
4046d913 PB |
533 | p = s->last_packet; |
534 | *(p++) = '$'; | |
4046d913 PB |
535 | memcpy(p, buf, len); |
536 | p += len; | |
b4608c04 FB |
537 | csum = 0; |
538 | for(i = 0; i < len; i++) { | |
539 | csum += buf[i]; | |
540 | } | |
4046d913 PB |
541 | *(p++) = '#'; |
542 | *(p++) = tohex((csum >> 4) & 0xf); | |
543 | *(p++) = tohex((csum) & 0xf); | |
b4608c04 | 544 | |
4046d913 | 545 | s->last_packet_len = p - s->last_packet; |
ffe8ab83 | 546 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
b4608c04 | 547 | |
4046d913 PB |
548 | #ifdef CONFIG_USER_ONLY |
549 | i = get_char(s); | |
550 | if (i < 0) | |
b4608c04 | 551 | return -1; |
4046d913 | 552 | if (i == '+') |
b4608c04 | 553 | break; |
4046d913 PB |
554 | #else |
555 | break; | |
556 | #endif | |
b4608c04 FB |
557 | } |
558 | return 0; | |
559 | } | |
560 | ||
56aebc89 PB |
561 | /* return -1 if error, 0 if OK */ |
562 | static int put_packet(GDBState *s, const char *buf) | |
563 | { | |
118e2268 | 564 | gdb_debug("reply='%s'\n", buf); |
79808573 | 565 | |
56aebc89 PB |
566 | return put_packet_binary(s, buf, strlen(buf)); |
567 | } | |
568 | ||
56aebc89 PB |
569 | /* Encode data using the encoding for 'x' packets. */ |
570 | static int memtox(char *buf, const char *mem, int len) | |
571 | { | |
572 | char *p = buf; | |
573 | char c; | |
574 | ||
575 | while (len--) { | |
576 | c = *(mem++); | |
577 | switch (c) { | |
578 | case '#': case '$': case '*': case '}': | |
579 | *(p++) = '}'; | |
580 | *(p++) = c ^ 0x20; | |
581 | break; | |
582 | default: | |
583 | *(p++) = c; | |
584 | break; | |
585 | } | |
586 | } | |
587 | return p - buf; | |
588 | } | |
f1ccf904 | 589 | |
5b24c641 AF |
590 | static const char *get_feature_xml(const char *p, const char **newp, |
591 | CPUClass *cc) | |
56aebc89 | 592 | { |
56aebc89 PB |
593 | size_t len; |
594 | int i; | |
595 | const char *name; | |
596 | static char target_xml[1024]; | |
597 | ||
598 | len = 0; | |
599 | while (p[len] && p[len] != ':') | |
600 | len++; | |
601 | *newp = p + len; | |
602 | ||
603 | name = NULL; | |
604 | if (strncmp(p, "target.xml", len) == 0) { | |
605 | /* Generate the XML description for this CPU. */ | |
606 | if (!target_xml[0]) { | |
607 | GDBRegisterState *r; | |
eac8b355 | 608 | CPUState *cpu = first_cpu; |
56aebc89 | 609 | |
b3820e6c DH |
610 | pstrcat(target_xml, sizeof(target_xml), |
611 | "<?xml version=\"1.0\"?>" | |
612 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">" | |
613 | "<target>"); | |
614 | if (cc->gdb_arch_name) { | |
615 | gchar *arch = cc->gdb_arch_name(cpu); | |
616 | pstrcat(target_xml, sizeof(target_xml), "<architecture>"); | |
617 | pstrcat(target_xml, sizeof(target_xml), arch); | |
618 | pstrcat(target_xml, sizeof(target_xml), "</architecture>"); | |
619 | g_free(arch); | |
620 | } | |
621 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); | |
622 | pstrcat(target_xml, sizeof(target_xml), cc->gdb_core_xml_file); | |
623 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
eac8b355 | 624 | for (r = cpu->gdb_regs; r; r = r->next) { |
2dc766da BS |
625 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); |
626 | pstrcat(target_xml, sizeof(target_xml), r->xml); | |
627 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
56aebc89 | 628 | } |
2dc766da | 629 | pstrcat(target_xml, sizeof(target_xml), "</target>"); |
56aebc89 PB |
630 | } |
631 | return target_xml; | |
632 | } | |
633 | for (i = 0; ; i++) { | |
634 | name = xml_builtin[i][0]; | |
635 | if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) | |
636 | break; | |
637 | } | |
638 | return name ? xml_builtin[i][1] : NULL; | |
639 | } | |
f1ccf904 | 640 | |
385b9f0e | 641 | static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
56aebc89 | 642 | { |
a0e372f0 | 643 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 644 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 645 | GDBRegisterState *r; |
f1ccf904 | 646 | |
a0e372f0 | 647 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 648 | return cc->gdb_read_register(cpu, mem_buf, reg); |
a0e372f0 | 649 | } |
f1ccf904 | 650 | |
eac8b355 | 651 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
652 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
653 | return r->get_reg(env, mem_buf, reg - r->base_reg); | |
654 | } | |
655 | } | |
656 | return 0; | |
f1ccf904 TS |
657 | } |
658 | ||
385b9f0e | 659 | static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
f1ccf904 | 660 | { |
a0e372f0 | 661 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 662 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 663 | GDBRegisterState *r; |
f1ccf904 | 664 | |
a0e372f0 | 665 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 666 | return cc->gdb_write_register(cpu, mem_buf, reg); |
a0e372f0 | 667 | } |
56aebc89 | 668 | |
eac8b355 | 669 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
670 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
671 | return r->set_reg(env, mem_buf, reg - r->base_reg); | |
672 | } | |
673 | } | |
6da41eaf FB |
674 | return 0; |
675 | } | |
676 | ||
56aebc89 PB |
677 | /* Register a supplemental set of CPU registers. If g_pos is nonzero it |
678 | specifies the first register number and these registers are included in | |
679 | a standard "g" packet. Direction is relative to gdb, i.e. get_reg is | |
680 | gdb reading a CPU register, and set_reg is gdb modifying a CPU register. | |
681 | */ | |
682 | ||
22169d41 AF |
683 | void gdb_register_coprocessor(CPUState *cpu, |
684 | gdb_reg_cb get_reg, gdb_reg_cb set_reg, | |
685 | int num_regs, const char *xml, int g_pos) | |
6da41eaf | 686 | { |
56aebc89 PB |
687 | GDBRegisterState *s; |
688 | GDBRegisterState **p; | |
56aebc89 | 689 | |
eac8b355 | 690 | p = &cpu->gdb_regs; |
56aebc89 PB |
691 | while (*p) { |
692 | /* Check for duplicates. */ | |
693 | if (strcmp((*p)->xml, xml) == 0) | |
694 | return; | |
695 | p = &(*p)->next; | |
696 | } | |
9643c25f SW |
697 | |
698 | s = g_new0(GDBRegisterState, 1); | |
a0e372f0 | 699 | s->base_reg = cpu->gdb_num_regs; |
9643c25f SW |
700 | s->num_regs = num_regs; |
701 | s->get_reg = get_reg; | |
702 | s->set_reg = set_reg; | |
703 | s->xml = xml; | |
704 | ||
56aebc89 | 705 | /* Add to end of list. */ |
a0e372f0 | 706 | cpu->gdb_num_regs += num_regs; |
56aebc89 PB |
707 | *p = s; |
708 | if (g_pos) { | |
709 | if (g_pos != s->base_reg) { | |
7ae6c571 ZY |
710 | error_report("Error: Bad gdb register numbering for '%s', " |
711 | "expected %d got %d", xml, g_pos, s->base_reg); | |
35143f01 AF |
712 | } else { |
713 | cpu->gdb_num_g_regs = cpu->gdb_num_regs; | |
56aebc89 PB |
714 | } |
715 | } | |
6da41eaf FB |
716 | } |
717 | ||
a1d1bb31 | 718 | #ifndef CONFIG_USER_ONLY |
2472b6c0 PM |
719 | /* Translate GDB watchpoint type to a flags value for cpu_watchpoint_* */ |
720 | static inline int xlat_gdb_type(CPUState *cpu, int gdbtype) | |
721 | { | |
722 | static const int xlat[] = { | |
723 | [GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, | |
724 | [GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, | |
725 | [GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, | |
726 | }; | |
727 | ||
728 | CPUClass *cc = CPU_GET_CLASS(cpu); | |
729 | int cputype = xlat[gdbtype]; | |
730 | ||
731 | if (cc->gdb_stop_before_watchpoint) { | |
732 | cputype |= BP_STOP_BEFORE_ACCESS; | |
733 | } | |
734 | return cputype; | |
735 | } | |
a1d1bb31 AL |
736 | #endif |
737 | ||
880a7578 | 738 | static int gdb_breakpoint_insert(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 739 | { |
182735ef | 740 | CPUState *cpu; |
880a7578 AL |
741 | int err = 0; |
742 | ||
62278814 | 743 | if (kvm_enabled()) { |
2e0f2cfb | 744 | return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 745 | } |
e22a25c9 | 746 | |
a1d1bb31 AL |
747 | switch (type) { |
748 | case GDB_BREAKPOINT_SW: | |
749 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 750 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
751 | err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL); |
752 | if (err) { | |
880a7578 | 753 | break; |
b3310ab3 | 754 | } |
880a7578 AL |
755 | } |
756 | return err; | |
a1d1bb31 AL |
757 | #ifndef CONFIG_USER_ONLY |
758 | case GDB_WATCHPOINT_WRITE: | |
759 | case GDB_WATCHPOINT_READ: | |
760 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 761 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
762 | err = cpu_watchpoint_insert(cpu, addr, len, |
763 | xlat_gdb_type(cpu, type), NULL); | |
764 | if (err) { | |
880a7578 | 765 | break; |
2472b6c0 | 766 | } |
880a7578 AL |
767 | } |
768 | return err; | |
a1d1bb31 AL |
769 | #endif |
770 | default: | |
771 | return -ENOSYS; | |
772 | } | |
773 | } | |
774 | ||
880a7578 | 775 | static int gdb_breakpoint_remove(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 776 | { |
182735ef | 777 | CPUState *cpu; |
880a7578 AL |
778 | int err = 0; |
779 | ||
62278814 | 780 | if (kvm_enabled()) { |
2e0f2cfb | 781 | return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 782 | } |
e22a25c9 | 783 | |
a1d1bb31 AL |
784 | switch (type) { |
785 | case GDB_BREAKPOINT_SW: | |
786 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 787 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
788 | err = cpu_breakpoint_remove(cpu, addr, BP_GDB); |
789 | if (err) { | |
880a7578 | 790 | break; |
b3310ab3 | 791 | } |
880a7578 AL |
792 | } |
793 | return err; | |
a1d1bb31 AL |
794 | #ifndef CONFIG_USER_ONLY |
795 | case GDB_WATCHPOINT_WRITE: | |
796 | case GDB_WATCHPOINT_READ: | |
797 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 798 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
799 | err = cpu_watchpoint_remove(cpu, addr, len, |
800 | xlat_gdb_type(cpu, type)); | |
880a7578 AL |
801 | if (err) |
802 | break; | |
803 | } | |
804 | return err; | |
a1d1bb31 AL |
805 | #endif |
806 | default: | |
807 | return -ENOSYS; | |
808 | } | |
809 | } | |
810 | ||
880a7578 | 811 | static void gdb_breakpoint_remove_all(void) |
a1d1bb31 | 812 | { |
182735ef | 813 | CPUState *cpu; |
880a7578 | 814 | |
e22a25c9 | 815 | if (kvm_enabled()) { |
2e0f2cfb | 816 | kvm_remove_all_breakpoints(gdbserver_state->c_cpu); |
e22a25c9 AL |
817 | return; |
818 | } | |
819 | ||
bdc44640 | 820 | CPU_FOREACH(cpu) { |
b3310ab3 | 821 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 822 | #ifndef CONFIG_USER_ONLY |
75a34036 | 823 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 824 | #endif |
880a7578 | 825 | } |
a1d1bb31 AL |
826 | } |
827 | ||
fab9d284 AJ |
828 | static void gdb_set_cpu_pc(GDBState *s, target_ulong pc) |
829 | { | |
2e0f2cfb | 830 | CPUState *cpu = s->c_cpu; |
f45748f1 AF |
831 | |
832 | cpu_synchronize_state(cpu); | |
4a2b24ed | 833 | cpu_set_pc(cpu, pc); |
fab9d284 AJ |
834 | } |
835 | ||
2e0f2cfb | 836 | static CPUState *find_cpu(uint32_t thread_id) |
1e9fa730 | 837 | { |
0d34282f | 838 | CPUState *cpu; |
1e9fa730 | 839 | |
bdc44640 | 840 | CPU_FOREACH(cpu) { |
aa48dd93 | 841 | if (cpu_index(cpu) == thread_id) { |
2e0f2cfb | 842 | return cpu; |
aa48dd93 | 843 | } |
1e9fa730 | 844 | } |
aa48dd93 AF |
845 | |
846 | return NULL; | |
1e9fa730 NF |
847 | } |
848 | ||
4dabe747 JK |
849 | static int is_query_packet(const char *p, const char *query, char separator) |
850 | { | |
851 | unsigned int query_len = strlen(query); | |
852 | ||
853 | return strncmp(p, query, query_len) == 0 && | |
854 | (p[query_len] == '\0' || p[query_len] == separator); | |
855 | } | |
856 | ||
544177ad CI |
857 | /** |
858 | * gdb_handle_vcont - Parses and handles a vCont packet. | |
859 | * returns -ENOTSUP if a command is unsupported, -EINVAL or -ERANGE if there is | |
860 | * a format error, 0 on success. | |
861 | */ | |
862 | static int gdb_handle_vcont(GDBState *s, const char *p) | |
863 | { | |
864 | int res, idx, signal = 0; | |
865 | char cur_action; | |
866 | char *newstates; | |
867 | unsigned long tmp; | |
868 | CPUState *cpu; | |
869 | #ifdef CONFIG_USER_ONLY | |
870 | int max_cpus = 1; /* global variable max_cpus exists only in system mode */ | |
871 | ||
872 | CPU_FOREACH(cpu) { | |
873 | max_cpus = max_cpus <= cpu->cpu_index ? cpu->cpu_index + 1 : max_cpus; | |
874 | } | |
875 | #endif | |
876 | /* uninitialised CPUs stay 0 */ | |
877 | newstates = g_new0(char, max_cpus); | |
878 | ||
879 | /* mark valid CPUs with 1 */ | |
880 | CPU_FOREACH(cpu) { | |
881 | newstates[cpu->cpu_index] = 1; | |
882 | } | |
883 | ||
884 | /* | |
885 | * res keeps track of what error we are returning, with -ENOTSUP meaning | |
886 | * that the command is unknown or unsupported, thus returning an empty | |
887 | * packet, while -EINVAL and -ERANGE cause an E22 packet, due to invalid, | |
888 | * or incorrect parameters passed. | |
889 | */ | |
890 | res = 0; | |
891 | while (*p) { | |
892 | if (*p++ != ';') { | |
893 | res = -ENOTSUP; | |
894 | goto out; | |
895 | } | |
896 | ||
897 | cur_action = *p++; | |
898 | if (cur_action == 'C' || cur_action == 'S') { | |
899 | cur_action = tolower(cur_action); | |
900 | res = qemu_strtoul(p + 1, &p, 16, &tmp); | |
901 | if (res) { | |
902 | goto out; | |
903 | } | |
904 | signal = gdb_signal_to_target(tmp); | |
905 | } else if (cur_action != 'c' && cur_action != 's') { | |
906 | /* unknown/invalid/unsupported command */ | |
907 | res = -ENOTSUP; | |
908 | goto out; | |
909 | } | |
910 | /* thread specification. special values: (none), -1 = all; 0 = any */ | |
911 | if ((p[0] == ':' && p[1] == '-' && p[2] == '1') || (p[0] != ':')) { | |
912 | if (*p == ':') { | |
913 | p += 3; | |
914 | } | |
915 | for (idx = 0; idx < max_cpus; idx++) { | |
916 | if (newstates[idx] == 1) { | |
917 | newstates[idx] = cur_action; | |
918 | } | |
919 | } | |
920 | } else if (*p == ':') { | |
921 | p++; | |
922 | res = qemu_strtoul(p, &p, 16, &tmp); | |
923 | if (res) { | |
924 | goto out; | |
925 | } | |
926 | idx = tmp; | |
927 | /* 0 means any thread, so we pick the first valid CPU */ | |
928 | if (!idx) { | |
929 | idx = cpu_index(first_cpu); | |
930 | } | |
931 | ||
932 | /* | |
933 | * If we are in user mode, the thread specified is actually a | |
934 | * thread id, and not an index. We need to find the actual | |
935 | * CPU first, and only then we can use its index. | |
936 | */ | |
937 | cpu = find_cpu(idx); | |
938 | /* invalid CPU/thread specified */ | |
939 | if (!idx || !cpu) { | |
940 | res = -EINVAL; | |
941 | goto out; | |
942 | } | |
943 | /* only use if no previous match occourred */ | |
944 | if (newstates[cpu->cpu_index] == 1) { | |
945 | newstates[cpu->cpu_index] = cur_action; | |
946 | } | |
947 | } | |
948 | } | |
949 | s->signal = signal; | |
950 | gdb_continue_partial(s, newstates); | |
951 | ||
952 | out: | |
953 | g_free(newstates); | |
954 | ||
955 | return res; | |
956 | } | |
957 | ||
880a7578 | 958 | static int gdb_handle_packet(GDBState *s, const char *line_buf) |
b4608c04 | 959 | { |
2e0f2cfb | 960 | CPUState *cpu; |
5b24c641 | 961 | CPUClass *cc; |
b4608c04 | 962 | const char *p; |
1e9fa730 NF |
963 | uint32_t thread; |
964 | int ch, reg_size, type, res; | |
56aebc89 PB |
965 | char buf[MAX_PACKET_LENGTH]; |
966 | uint8_t mem_buf[MAX_PACKET_LENGTH]; | |
967 | uint8_t *registers; | |
9d9754a3 | 968 | target_ulong addr, len; |
3b46e624 | 969 | |
118e2268 AB |
970 | |
971 | gdb_debug("command='%s'\n", line_buf); | |
972 | ||
858693c6 FB |
973 | p = line_buf; |
974 | ch = *p++; | |
975 | switch(ch) { | |
976 | case '?': | |
1fddef4b | 977 | /* TODO: Make this return the correct value for user-mode. */ |
ca587a8e | 978 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", GDB_SIGNAL_TRAP, |
2e0f2cfb | 979 | cpu_index(s->c_cpu)); |
858693c6 | 980 | put_packet(s, buf); |
7d03f82f EI |
981 | /* Remove all the breakpoints when this query is issued, |
982 | * because gdb is doing and initial connect and the state | |
983 | * should be cleaned up. | |
984 | */ | |
880a7578 | 985 | gdb_breakpoint_remove_all(); |
858693c6 FB |
986 | break; |
987 | case 'c': | |
988 | if (*p != '\0') { | |
9d9754a3 | 989 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 990 | gdb_set_cpu_pc(s, addr); |
858693c6 | 991 | } |
ca587a8e | 992 | s->signal = 0; |
ba70a624 | 993 | gdb_continue(s); |
41625033 | 994 | return RS_IDLE; |
1f487ee9 | 995 | case 'C': |
ca587a8e AJ |
996 | s->signal = gdb_signal_to_target (strtoul(p, (char **)&p, 16)); |
997 | if (s->signal == -1) | |
998 | s->signal = 0; | |
1f487ee9 EI |
999 | gdb_continue(s); |
1000 | return RS_IDLE; | |
dd32aa10 JK |
1001 | case 'v': |
1002 | if (strncmp(p, "Cont", 4) == 0) { | |
dd32aa10 JK |
1003 | p += 4; |
1004 | if (*p == '?') { | |
1005 | put_packet(s, "vCont;c;C;s;S"); | |
1006 | break; | |
1007 | } | |
544177ad CI |
1008 | |
1009 | res = gdb_handle_vcont(s, p); | |
1010 | ||
dd32aa10 | 1011 | if (res) { |
544177ad CI |
1012 | if ((res == -EINVAL) || (res == -ERANGE)) { |
1013 | put_packet(s, "E22"); | |
1014 | break; | |
dd32aa10 | 1015 | } |
544177ad | 1016 | goto unknown_command; |
dd32aa10 JK |
1017 | } |
1018 | break; | |
1019 | } else { | |
1020 | goto unknown_command; | |
1021 | } | |
7d03f82f EI |
1022 | case 'k': |
1023 | /* Kill the target */ | |
7ae6c571 | 1024 | error_report("QEMU: Terminated via GDBstub"); |
7d03f82f EI |
1025 | exit(0); |
1026 | case 'D': | |
1027 | /* Detach packet */ | |
880a7578 | 1028 | gdb_breakpoint_remove_all(); |
7ea06da3 | 1029 | gdb_syscall_mode = GDB_SYS_DISABLED; |
7d03f82f EI |
1030 | gdb_continue(s); |
1031 | put_packet(s, "OK"); | |
1032 | break; | |
858693c6 FB |
1033 | case 's': |
1034 | if (*p != '\0') { | |
8fac5803 | 1035 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 1036 | gdb_set_cpu_pc(s, addr); |
858693c6 | 1037 | } |
2e0f2cfb | 1038 | cpu_single_step(s->c_cpu, sstep_flags); |
ba70a624 | 1039 | gdb_continue(s); |
41625033 | 1040 | return RS_IDLE; |
a2d1ebaf PB |
1041 | case 'F': |
1042 | { | |
1043 | target_ulong ret; | |
1044 | target_ulong err; | |
1045 | ||
1046 | ret = strtoull(p, (char **)&p, 16); | |
1047 | if (*p == ',') { | |
1048 | p++; | |
1049 | err = strtoull(p, (char **)&p, 16); | |
1050 | } else { | |
1051 | err = 0; | |
1052 | } | |
1053 | if (*p == ',') | |
1054 | p++; | |
1055 | type = *p; | |
cdb432b2 | 1056 | if (s->current_syscall_cb) { |
2e0f2cfb | 1057 | s->current_syscall_cb(s->c_cpu, ret, err); |
cdb432b2 MI |
1058 | s->current_syscall_cb = NULL; |
1059 | } | |
a2d1ebaf PB |
1060 | if (type == 'C') { |
1061 | put_packet(s, "T02"); | |
1062 | } else { | |
ba70a624 | 1063 | gdb_continue(s); |
a2d1ebaf PB |
1064 | } |
1065 | } | |
1066 | break; | |
858693c6 | 1067 | case 'g': |
2e0f2cfb | 1068 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 1069 | len = 0; |
35143f01 | 1070 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs; addr++) { |
2e0f2cfb | 1071 | reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr); |
56aebc89 PB |
1072 | len += reg_size; |
1073 | } | |
1074 | memtohex(buf, mem_buf, len); | |
858693c6 FB |
1075 | put_packet(s, buf); |
1076 | break; | |
1077 | case 'G': | |
2e0f2cfb | 1078 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 1079 | registers = mem_buf; |
858693c6 FB |
1080 | len = strlen(p) / 2; |
1081 | hextomem((uint8_t *)registers, p, len); | |
35143f01 | 1082 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs && len > 0; addr++) { |
2e0f2cfb | 1083 | reg_size = gdb_write_register(s->g_cpu, registers, addr); |
56aebc89 PB |
1084 | len -= reg_size; |
1085 | registers += reg_size; | |
1086 | } | |
858693c6 FB |
1087 | put_packet(s, "OK"); |
1088 | break; | |
1089 | case 'm': | |
9d9754a3 | 1090 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1091 | if (*p == ',') |
1092 | p++; | |
9d9754a3 | 1093 | len = strtoull(p, NULL, 16); |
5accecb3 KW |
1094 | |
1095 | /* memtohex() doubles the required space */ | |
1096 | if (len > MAX_PACKET_LENGTH / 2) { | |
1097 | put_packet (s, "E22"); | |
1098 | break; | |
1099 | } | |
1100 | ||
2e0f2cfb | 1101 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, false) != 0) { |
6f970bd9 FB |
1102 | put_packet (s, "E14"); |
1103 | } else { | |
1104 | memtohex(buf, mem_buf, len); | |
1105 | put_packet(s, buf); | |
1106 | } | |
858693c6 FB |
1107 | break; |
1108 | case 'M': | |
9d9754a3 | 1109 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1110 | if (*p == ',') |
1111 | p++; | |
9d9754a3 | 1112 | len = strtoull(p, (char **)&p, 16); |
b328f873 | 1113 | if (*p == ':') |
858693c6 | 1114 | p++; |
5accecb3 KW |
1115 | |
1116 | /* hextomem() reads 2*len bytes */ | |
1117 | if (len > strlen(p) / 2) { | |
1118 | put_packet (s, "E22"); | |
1119 | break; | |
1120 | } | |
858693c6 | 1121 | hextomem(mem_buf, p, len); |
2e0f2cfb | 1122 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, |
f3659eee | 1123 | true) != 0) { |
905f20b1 | 1124 | put_packet(s, "E14"); |
44520db1 | 1125 | } else { |
858693c6 | 1126 | put_packet(s, "OK"); |
44520db1 | 1127 | } |
858693c6 | 1128 | break; |
56aebc89 PB |
1129 | case 'p': |
1130 | /* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable. | |
1131 | This works, but can be very slow. Anything new enough to | |
1132 | understand XML also knows how to use this properly. */ | |
1133 | if (!gdb_has_xml) | |
1134 | goto unknown_command; | |
1135 | addr = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 1136 | reg_size = gdb_read_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1137 | if (reg_size) { |
1138 | memtohex(buf, mem_buf, reg_size); | |
1139 | put_packet(s, buf); | |
1140 | } else { | |
1141 | put_packet(s, "E14"); | |
1142 | } | |
1143 | break; | |
1144 | case 'P': | |
1145 | if (!gdb_has_xml) | |
1146 | goto unknown_command; | |
1147 | addr = strtoull(p, (char **)&p, 16); | |
1148 | if (*p == '=') | |
1149 | p++; | |
1150 | reg_size = strlen(p) / 2; | |
1151 | hextomem(mem_buf, p, reg_size); | |
2e0f2cfb | 1152 | gdb_write_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1153 | put_packet(s, "OK"); |
1154 | break; | |
858693c6 | 1155 | case 'Z': |
858693c6 FB |
1156 | case 'z': |
1157 | type = strtoul(p, (char **)&p, 16); | |
1158 | if (*p == ',') | |
1159 | p++; | |
9d9754a3 | 1160 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1161 | if (*p == ',') |
1162 | p++; | |
9d9754a3 | 1163 | len = strtoull(p, (char **)&p, 16); |
a1d1bb31 | 1164 | if (ch == 'Z') |
880a7578 | 1165 | res = gdb_breakpoint_insert(addr, len, type); |
a1d1bb31 | 1166 | else |
880a7578 | 1167 | res = gdb_breakpoint_remove(addr, len, type); |
a1d1bb31 AL |
1168 | if (res >= 0) |
1169 | put_packet(s, "OK"); | |
1170 | else if (res == -ENOSYS) | |
0f459d16 | 1171 | put_packet(s, ""); |
a1d1bb31 AL |
1172 | else |
1173 | put_packet(s, "E22"); | |
858693c6 | 1174 | break; |
880a7578 AL |
1175 | case 'H': |
1176 | type = *p++; | |
1177 | thread = strtoull(p, (char **)&p, 16); | |
1178 | if (thread == -1 || thread == 0) { | |
1179 | put_packet(s, "OK"); | |
1180 | break; | |
1181 | } | |
2e0f2cfb AF |
1182 | cpu = find_cpu(thread); |
1183 | if (cpu == NULL) { | |
880a7578 AL |
1184 | put_packet(s, "E22"); |
1185 | break; | |
1186 | } | |
1187 | switch (type) { | |
1188 | case 'c': | |
2e0f2cfb | 1189 | s->c_cpu = cpu; |
880a7578 AL |
1190 | put_packet(s, "OK"); |
1191 | break; | |
1192 | case 'g': | |
2e0f2cfb | 1193 | s->g_cpu = cpu; |
880a7578 AL |
1194 | put_packet(s, "OK"); |
1195 | break; | |
1196 | default: | |
1197 | put_packet(s, "E22"); | |
1198 | break; | |
1199 | } | |
1200 | break; | |
1201 | case 'T': | |
1202 | thread = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 1203 | cpu = find_cpu(thread); |
1e9fa730 | 1204 | |
2e0f2cfb | 1205 | if (cpu != NULL) { |
1e9fa730 NF |
1206 | put_packet(s, "OK"); |
1207 | } else { | |
880a7578 | 1208 | put_packet(s, "E22"); |
1e9fa730 | 1209 | } |
880a7578 | 1210 | break; |
978efd6a | 1211 | case 'q': |
60897d36 EI |
1212 | case 'Q': |
1213 | /* parse any 'q' packets here */ | |
1214 | if (!strcmp(p,"qemu.sstepbits")) { | |
1215 | /* Query Breakpoint bit definitions */ | |
363a37d5 BS |
1216 | snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
1217 | SSTEP_ENABLE, | |
1218 | SSTEP_NOIRQ, | |
1219 | SSTEP_NOTIMER); | |
60897d36 EI |
1220 | put_packet(s, buf); |
1221 | break; | |
4dabe747 | 1222 | } else if (is_query_packet(p, "qemu.sstep", '=')) { |
60897d36 EI |
1223 | /* Display or change the sstep_flags */ |
1224 | p += 10; | |
1225 | if (*p != '=') { | |
1226 | /* Display current setting */ | |
363a37d5 | 1227 | snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
60897d36 EI |
1228 | put_packet(s, buf); |
1229 | break; | |
1230 | } | |
1231 | p++; | |
1232 | type = strtoul(p, (char **)&p, 16); | |
1233 | sstep_flags = type; | |
1234 | put_packet(s, "OK"); | |
1235 | break; | |
880a7578 AL |
1236 | } else if (strcmp(p,"C") == 0) { |
1237 | /* "Current thread" remains vague in the spec, so always return | |
1238 | * the first CPU (gdb returns the first thread). */ | |
1239 | put_packet(s, "QC1"); | |
1240 | break; | |
1241 | } else if (strcmp(p,"fThreadInfo") == 0) { | |
52f34623 | 1242 | s->query_cpu = first_cpu; |
880a7578 AL |
1243 | goto report_cpuinfo; |
1244 | } else if (strcmp(p,"sThreadInfo") == 0) { | |
1245 | report_cpuinfo: | |
1246 | if (s->query_cpu) { | |
52f34623 | 1247 | snprintf(buf, sizeof(buf), "m%x", cpu_index(s->query_cpu)); |
880a7578 | 1248 | put_packet(s, buf); |
bdc44640 | 1249 | s->query_cpu = CPU_NEXT(s->query_cpu); |
880a7578 AL |
1250 | } else |
1251 | put_packet(s, "l"); | |
1252 | break; | |
1253 | } else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) { | |
1254 | thread = strtoull(p+16, (char **)&p, 16); | |
2e0f2cfb AF |
1255 | cpu = find_cpu(thread); |
1256 | if (cpu != NULL) { | |
cb446eca | 1257 | cpu_synchronize_state(cpu); |
5accecb3 KW |
1258 | /* memtohex() doubles the required space */ |
1259 | len = snprintf((char *)mem_buf, sizeof(buf) / 2, | |
55e5c285 | 1260 | "CPU#%d [%s]", cpu->cpu_index, |
259186a7 | 1261 | cpu->halted ? "halted " : "running"); |
1e9fa730 NF |
1262 | memtohex(buf, mem_buf, len); |
1263 | put_packet(s, buf); | |
1264 | } | |
880a7578 | 1265 | break; |
60897d36 | 1266 | } |
0b8a988c | 1267 | #ifdef CONFIG_USER_ONLY |
070949f3 | 1268 | else if (strcmp(p, "Offsets") == 0) { |
0429a971 | 1269 | TaskState *ts = s->c_cpu->opaque; |
978efd6a | 1270 | |
363a37d5 BS |
1271 | snprintf(buf, sizeof(buf), |
1272 | "Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx | |
1273 | ";Bss=" TARGET_ABI_FMT_lx, | |
1274 | ts->info->code_offset, | |
1275 | ts->info->data_offset, | |
1276 | ts->info->data_offset); | |
978efd6a PB |
1277 | put_packet(s, buf); |
1278 | break; | |
1279 | } | |
0b8a988c | 1280 | #else /* !CONFIG_USER_ONLY */ |
8a34a0fb AL |
1281 | else if (strncmp(p, "Rcmd,", 5) == 0) { |
1282 | int len = strlen(p + 5); | |
1283 | ||
1284 | if ((len % 2) != 0) { | |
1285 | put_packet(s, "E01"); | |
1286 | break; | |
1287 | } | |
8a34a0fb | 1288 | len = len / 2; |
5accecb3 | 1289 | hextomem(mem_buf, p + 5, len); |
8a34a0fb | 1290 | mem_buf[len++] = 0; |
fa5efccb | 1291 | qemu_chr_be_write(s->mon_chr, mem_buf, len); |
8a34a0fb AL |
1292 | put_packet(s, "OK"); |
1293 | break; | |
1294 | } | |
0b8a988c | 1295 | #endif /* !CONFIG_USER_ONLY */ |
4dabe747 | 1296 | if (is_query_packet(p, "Supported", ':')) { |
5b3715bf | 1297 | snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
5b24c641 AF |
1298 | cc = CPU_GET_CLASS(first_cpu); |
1299 | if (cc->gdb_core_xml_file != NULL) { | |
1300 | pstrcat(buf, sizeof(buf), ";qXfer:features:read+"); | |
1301 | } | |
56aebc89 PB |
1302 | put_packet(s, buf); |
1303 | break; | |
1304 | } | |
56aebc89 PB |
1305 | if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
1306 | const char *xml; | |
1307 | target_ulong total_len; | |
1308 | ||
5b24c641 AF |
1309 | cc = CPU_GET_CLASS(first_cpu); |
1310 | if (cc->gdb_core_xml_file == NULL) { | |
1311 | goto unknown_command; | |
1312 | } | |
1313 | ||
5b50e790 | 1314 | gdb_has_xml = true; |
56aebc89 | 1315 | p += 19; |
5b24c641 | 1316 | xml = get_feature_xml(p, &p, cc); |
56aebc89 | 1317 | if (!xml) { |
5b3715bf | 1318 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1319 | put_packet(s, buf); |
1320 | break; | |
1321 | } | |
1322 | ||
1323 | if (*p == ':') | |
1324 | p++; | |
1325 | addr = strtoul(p, (char **)&p, 16); | |
1326 | if (*p == ',') | |
1327 | p++; | |
1328 | len = strtoul(p, (char **)&p, 16); | |
1329 | ||
1330 | total_len = strlen(xml); | |
1331 | if (addr > total_len) { | |
5b3715bf | 1332 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1333 | put_packet(s, buf); |
1334 | break; | |
1335 | } | |
1336 | if (len > (MAX_PACKET_LENGTH - 5) / 2) | |
1337 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
1338 | if (len < total_len - addr) { | |
1339 | buf[0] = 'm'; | |
1340 | len = memtox(buf + 1, xml + addr, len); | |
1341 | } else { | |
1342 | buf[0] = 'l'; | |
1343 | len = memtox(buf + 1, xml + addr, total_len - addr); | |
1344 | } | |
1345 | put_packet_binary(s, buf, len + 1); | |
1346 | break; | |
1347 | } | |
a3919386 JK |
1348 | if (is_query_packet(p, "Attached", ':')) { |
1349 | put_packet(s, GDB_ATTACHED); | |
1350 | break; | |
1351 | } | |
56aebc89 PB |
1352 | /* Unrecognised 'q' command. */ |
1353 | goto unknown_command; | |
1354 | ||
858693c6 | 1355 | default: |
56aebc89 | 1356 | unknown_command: |
858693c6 FB |
1357 | /* put empty packet */ |
1358 | buf[0] = '\0'; | |
1359 | put_packet(s, buf); | |
1360 | break; | |
1361 | } | |
1362 | return RS_IDLE; | |
1363 | } | |
1364 | ||
64f6b346 | 1365 | void gdb_set_stop_cpu(CPUState *cpu) |
880a7578 | 1366 | { |
2e0f2cfb AF |
1367 | gdbserver_state->c_cpu = cpu; |
1368 | gdbserver_state->g_cpu = cpu; | |
880a7578 AL |
1369 | } |
1370 | ||
1fddef4b | 1371 | #ifndef CONFIG_USER_ONLY |
1dfb4dd9 | 1372 | static void gdb_vm_state_change(void *opaque, int running, RunState state) |
858693c6 | 1373 | { |
880a7578 | 1374 | GDBState *s = gdbserver_state; |
2e0f2cfb | 1375 | CPUState *cpu = s->c_cpu; |
858693c6 | 1376 | char buf[256]; |
d6fc1b39 | 1377 | const char *type; |
858693c6 FB |
1378 | int ret; |
1379 | ||
cdb432b2 MI |
1380 | if (running || s->state == RS_INACTIVE) { |
1381 | return; | |
1382 | } | |
1383 | /* Is there a GDB syscall waiting to be sent? */ | |
1384 | if (s->current_syscall_cb) { | |
1385 | put_packet(s, s->syscall_buf); | |
a2d1ebaf | 1386 | return; |
e07bbac5 | 1387 | } |
1dfb4dd9 | 1388 | switch (state) { |
0461d5a6 | 1389 | case RUN_STATE_DEBUG: |
ff4700b0 AF |
1390 | if (cpu->watchpoint_hit) { |
1391 | switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) { | |
a1d1bb31 | 1392 | case BP_MEM_READ: |
d6fc1b39 AL |
1393 | type = "r"; |
1394 | break; | |
a1d1bb31 | 1395 | case BP_MEM_ACCESS: |
d6fc1b39 AL |
1396 | type = "a"; |
1397 | break; | |
1398 | default: | |
1399 | type = ""; | |
1400 | break; | |
1401 | } | |
880a7578 AL |
1402 | snprintf(buf, sizeof(buf), |
1403 | "T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";", | |
0d34282f | 1404 | GDB_SIGNAL_TRAP, cpu_index(cpu), type, |
ff4700b0 AF |
1405 | (target_ulong)cpu->watchpoint_hit->vaddr); |
1406 | cpu->watchpoint_hit = NULL; | |
425189a8 | 1407 | goto send_packet; |
6658ffb8 | 1408 | } |
bbd77c18 | 1409 | tb_flush(cpu); |
ca587a8e | 1410 | ret = GDB_SIGNAL_TRAP; |
425189a8 | 1411 | break; |
0461d5a6 | 1412 | case RUN_STATE_PAUSED: |
9781e040 | 1413 | ret = GDB_SIGNAL_INT; |
425189a8 | 1414 | break; |
0461d5a6 | 1415 | case RUN_STATE_SHUTDOWN: |
425189a8 JK |
1416 | ret = GDB_SIGNAL_QUIT; |
1417 | break; | |
0461d5a6 | 1418 | case RUN_STATE_IO_ERROR: |
425189a8 JK |
1419 | ret = GDB_SIGNAL_IO; |
1420 | break; | |
0461d5a6 | 1421 | case RUN_STATE_WATCHDOG: |
425189a8 JK |
1422 | ret = GDB_SIGNAL_ALRM; |
1423 | break; | |
0461d5a6 | 1424 | case RUN_STATE_INTERNAL_ERROR: |
425189a8 JK |
1425 | ret = GDB_SIGNAL_ABRT; |
1426 | break; | |
0461d5a6 LC |
1427 | case RUN_STATE_SAVE_VM: |
1428 | case RUN_STATE_RESTORE_VM: | |
425189a8 | 1429 | return; |
0461d5a6 | 1430 | case RUN_STATE_FINISH_MIGRATE: |
425189a8 JK |
1431 | ret = GDB_SIGNAL_XCPU; |
1432 | break; | |
1433 | default: | |
1434 | ret = GDB_SIGNAL_UNKNOWN; | |
1435 | break; | |
bbeb7b5c | 1436 | } |
226d007d | 1437 | gdb_set_stop_cpu(cpu); |
0d34282f | 1438 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, cpu_index(cpu)); |
425189a8 JK |
1439 | |
1440 | send_packet: | |
858693c6 | 1441 | put_packet(s, buf); |
425189a8 JK |
1442 | |
1443 | /* disable single step if it was enabled */ | |
3825b28f | 1444 | cpu_single_step(cpu, 0); |
858693c6 | 1445 | } |
1fddef4b | 1446 | #endif |
858693c6 | 1447 | |
a2d1ebaf PB |
1448 | /* Send a gdb syscall request. |
1449 | This accepts limited printf-style format specifiers, specifically: | |
a87295e8 PB |
1450 | %x - target_ulong argument printed in hex. |
1451 | %lx - 64-bit argument printed in hex. | |
1452 | %s - string pointer (target_ulong) and length (int) pair. */ | |
19239b39 | 1453 | void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va) |
a2d1ebaf | 1454 | { |
a2d1ebaf | 1455 | char *p; |
cdb432b2 | 1456 | char *p_end; |
a2d1ebaf | 1457 | target_ulong addr; |
a87295e8 | 1458 | uint64_t i64; |
a2d1ebaf PB |
1459 | GDBState *s; |
1460 | ||
880a7578 | 1461 | s = gdbserver_state; |
a2d1ebaf PB |
1462 | if (!s) |
1463 | return; | |
cdb432b2 | 1464 | s->current_syscall_cb = cb; |
a2d1ebaf | 1465 | #ifndef CONFIG_USER_ONLY |
0461d5a6 | 1466 | vm_stop(RUN_STATE_DEBUG); |
a2d1ebaf | 1467 | #endif |
cdb432b2 MI |
1468 | p = s->syscall_buf; |
1469 | p_end = &s->syscall_buf[sizeof(s->syscall_buf)]; | |
a2d1ebaf PB |
1470 | *(p++) = 'F'; |
1471 | while (*fmt) { | |
1472 | if (*fmt == '%') { | |
1473 | fmt++; | |
1474 | switch (*fmt++) { | |
1475 | case 'x': | |
1476 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1477 | p += snprintf(p, p_end - p, TARGET_FMT_lx, addr); |
a2d1ebaf | 1478 | break; |
a87295e8 PB |
1479 | case 'l': |
1480 | if (*(fmt++) != 'x') | |
1481 | goto bad_format; | |
1482 | i64 = va_arg(va, uint64_t); | |
cdb432b2 | 1483 | p += snprintf(p, p_end - p, "%" PRIx64, i64); |
a87295e8 | 1484 | break; |
a2d1ebaf PB |
1485 | case 's': |
1486 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1487 | p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x", |
363a37d5 | 1488 | addr, va_arg(va, int)); |
a2d1ebaf PB |
1489 | break; |
1490 | default: | |
a87295e8 | 1491 | bad_format: |
7ae6c571 ZY |
1492 | error_report("gdbstub: Bad syscall format string '%s'", |
1493 | fmt - 1); | |
a2d1ebaf PB |
1494 | break; |
1495 | } | |
1496 | } else { | |
1497 | *(p++) = *(fmt++); | |
1498 | } | |
1499 | } | |
8a93e02a | 1500 | *p = 0; |
a2d1ebaf | 1501 | #ifdef CONFIG_USER_ONLY |
cdb432b2 | 1502 | put_packet(s, s->syscall_buf); |
2e0f2cfb | 1503 | gdb_handlesig(s->c_cpu, 0); |
a2d1ebaf | 1504 | #else |
cdb432b2 MI |
1505 | /* In this case wait to send the syscall packet until notification that |
1506 | the CPU has stopped. This must be done because if the packet is sent | |
1507 | now the reply from the syscall request could be received while the CPU | |
1508 | is still in the running state, which can cause packets to be dropped | |
1509 | and state transition 'T' packets to be sent while the syscall is still | |
1510 | being processed. */ | |
9102deda | 1511 | qemu_cpu_kick(s->c_cpu); |
a2d1ebaf PB |
1512 | #endif |
1513 | } | |
1514 | ||
19239b39 PM |
1515 | void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
1516 | { | |
1517 | va_list va; | |
1518 | ||
1519 | va_start(va, fmt); | |
1520 | gdb_do_syscallv(cb, fmt, va); | |
1521 | va_end(va); | |
1522 | } | |
1523 | ||
6a00d601 | 1524 | static void gdb_read_byte(GDBState *s, int ch) |
858693c6 | 1525 | { |
60fe76f3 | 1526 | uint8_t reply; |
858693c6 | 1527 | |
1fddef4b | 1528 | #ifndef CONFIG_USER_ONLY |
4046d913 PB |
1529 | if (s->last_packet_len) { |
1530 | /* Waiting for a response to the last packet. If we see the start | |
1531 | of a new command then abandon the previous response. */ | |
1532 | if (ch == '-') { | |
118e2268 | 1533 | gdb_debug("Got NACK, retransmitting\n"); |
ffe8ab83 | 1534 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
118e2268 AB |
1535 | } else if (ch == '+') { |
1536 | gdb_debug("Got ACK\n"); | |
1537 | } else { | |
1538 | gdb_debug("Got '%c' when expecting ACK/NACK\n", ch); | |
4046d913 | 1539 | } |
118e2268 | 1540 | |
4046d913 PB |
1541 | if (ch == '+' || ch == '$') |
1542 | s->last_packet_len = 0; | |
1543 | if (ch != '$') | |
1544 | return; | |
1545 | } | |
1354869c | 1546 | if (runstate_is_running()) { |
858693c6 FB |
1547 | /* when the CPU is running, we cannot do anything except stop |
1548 | it when receiving a char */ | |
0461d5a6 | 1549 | vm_stop(RUN_STATE_PAUSED); |
5fafdf24 | 1550 | } else |
1fddef4b | 1551 | #endif |
41625033 | 1552 | { |
858693c6 FB |
1553 | switch(s->state) { |
1554 | case RS_IDLE: | |
1555 | if (ch == '$') { | |
4bf43122 | 1556 | /* start of command packet */ |
858693c6 | 1557 | s->line_buf_index = 0; |
4bf43122 | 1558 | s->line_sum = 0; |
858693c6 | 1559 | s->state = RS_GETLINE; |
4bf43122 | 1560 | } else { |
118e2268 | 1561 | gdb_debug("received garbage between packets: 0x%x\n", ch); |
c33a346e | 1562 | } |
b4608c04 | 1563 | break; |
858693c6 | 1564 | case RS_GETLINE: |
4bf43122 DG |
1565 | if (ch == '}') { |
1566 | /* start escape sequence */ | |
1567 | s->state = RS_GETLINE_ESC; | |
1568 | s->line_sum += ch; | |
1569 | } else if (ch == '*') { | |
1570 | /* start run length encoding sequence */ | |
1571 | s->state = RS_GETLINE_RLE; | |
1572 | s->line_sum += ch; | |
1573 | } else if (ch == '#') { | |
1574 | /* end of command, start of checksum*/ | |
1575 | s->state = RS_CHKSUM1; | |
1576 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { | |
118e2268 | 1577 | gdb_debug("command buffer overrun, dropping command\n"); |
4bf43122 DG |
1578 | s->state = RS_IDLE; |
1579 | } else { | |
1580 | /* unescaped command character */ | |
1581 | s->line_buf[s->line_buf_index++] = ch; | |
1582 | s->line_sum += ch; | |
1583 | } | |
1584 | break; | |
1585 | case RS_GETLINE_ESC: | |
858693c6 | 1586 | if (ch == '#') { |
4bf43122 DG |
1587 | /* unexpected end of command in escape sequence */ |
1588 | s->state = RS_CHKSUM1; | |
858693c6 | 1589 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
4bf43122 | 1590 | /* command buffer overrun */ |
118e2268 | 1591 | gdb_debug("command buffer overrun, dropping command\n"); |
858693c6 | 1592 | s->state = RS_IDLE; |
4c3a88a2 | 1593 | } else { |
4bf43122 DG |
1594 | /* parse escaped character and leave escape state */ |
1595 | s->line_buf[s->line_buf_index++] = ch ^ 0x20; | |
1596 | s->line_sum += ch; | |
1597 | s->state = RS_GETLINE; | |
1598 | } | |
1599 | break; | |
1600 | case RS_GETLINE_RLE: | |
1601 | if (ch < ' ') { | |
1602 | /* invalid RLE count encoding */ | |
118e2268 | 1603 | gdb_debug("got invalid RLE count: 0x%x\n", ch); |
4bf43122 DG |
1604 | s->state = RS_GETLINE; |
1605 | } else { | |
1606 | /* decode repeat length */ | |
1607 | int repeat = (unsigned char)ch - ' ' + 3; | |
1608 | if (s->line_buf_index + repeat >= sizeof(s->line_buf) - 1) { | |
1609 | /* that many repeats would overrun the command buffer */ | |
118e2268 | 1610 | gdb_debug("command buffer overrun, dropping command\n"); |
4bf43122 DG |
1611 | s->state = RS_IDLE; |
1612 | } else if (s->line_buf_index < 1) { | |
1613 | /* got a repeat but we have nothing to repeat */ | |
118e2268 | 1614 | gdb_debug("got invalid RLE sequence\n"); |
4bf43122 DG |
1615 | s->state = RS_GETLINE; |
1616 | } else { | |
1617 | /* repeat the last character */ | |
1618 | memset(s->line_buf + s->line_buf_index, | |
1619 | s->line_buf[s->line_buf_index - 1], repeat); | |
1620 | s->line_buf_index += repeat; | |
1621 | s->line_sum += ch; | |
1622 | s->state = RS_GETLINE; | |
1623 | } | |
4c3a88a2 FB |
1624 | } |
1625 | break; | |
858693c6 | 1626 | case RS_CHKSUM1: |
4bf43122 DG |
1627 | /* get high hex digit of checksum */ |
1628 | if (!isxdigit(ch)) { | |
118e2268 | 1629 | gdb_debug("got invalid command checksum digit\n"); |
4bf43122 DG |
1630 | s->state = RS_GETLINE; |
1631 | break; | |
1632 | } | |
858693c6 FB |
1633 | s->line_buf[s->line_buf_index] = '\0'; |
1634 | s->line_csum = fromhex(ch) << 4; | |
1635 | s->state = RS_CHKSUM2; | |
1636 | break; | |
1637 | case RS_CHKSUM2: | |
4bf43122 DG |
1638 | /* get low hex digit of checksum */ |
1639 | if (!isxdigit(ch)) { | |
118e2268 | 1640 | gdb_debug("got invalid command checksum digit\n"); |
4bf43122 DG |
1641 | s->state = RS_GETLINE; |
1642 | break; | |
858693c6 | 1643 | } |
4bf43122 DG |
1644 | s->line_csum |= fromhex(ch); |
1645 | ||
1646 | if (s->line_csum != (s->line_sum & 0xff)) { | |
118e2268 | 1647 | gdb_debug("got command packet with incorrect checksum\n"); |
4bf43122 | 1648 | /* send NAK reply */ |
60fe76f3 TS |
1649 | reply = '-'; |
1650 | put_buffer(s, &reply, 1); | |
858693c6 | 1651 | s->state = RS_IDLE; |
4c3a88a2 | 1652 | } else { |
4bf43122 | 1653 | /* send ACK reply */ |
60fe76f3 TS |
1654 | reply = '+'; |
1655 | put_buffer(s, &reply, 1); | |
880a7578 | 1656 | s->state = gdb_handle_packet(s, s->line_buf); |
4c3a88a2 FB |
1657 | } |
1658 | break; | |
a2d1ebaf PB |
1659 | default: |
1660 | abort(); | |
858693c6 FB |
1661 | } |
1662 | } | |
1663 | } | |
1664 | ||
0e1c9c54 | 1665 | /* Tell the remote gdb that the process has exited. */ |
9349b4f9 | 1666 | void gdb_exit(CPUArchState *env, int code) |
0e1c9c54 PB |
1667 | { |
1668 | GDBState *s; | |
1669 | char buf[4]; | |
1670 | ||
1671 | s = gdbserver_state; | |
1672 | if (!s) { | |
1673 | return; | |
1674 | } | |
1675 | #ifdef CONFIG_USER_ONLY | |
1676 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1677 | return; | |
1678 | } | |
1679 | #endif | |
1680 | ||
1681 | snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code); | |
1682 | put_packet(s, buf); | |
e2af15b2 FC |
1683 | |
1684 | #ifndef CONFIG_USER_ONLY | |
1ce2610c | 1685 | qemu_chr_fe_deinit(&s->chr, true); |
e2af15b2 | 1686 | #endif |
0e1c9c54 PB |
1687 | } |
1688 | ||
1fddef4b FB |
1689 | #ifdef CONFIG_USER_ONLY |
1690 | int | |
db6b81d4 | 1691 | gdb_handlesig(CPUState *cpu, int sig) |
1fddef4b | 1692 | { |
5ca666c7 AF |
1693 | GDBState *s; |
1694 | char buf[256]; | |
1695 | int n; | |
1fddef4b | 1696 | |
5ca666c7 AF |
1697 | s = gdbserver_state; |
1698 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1699 | return sig; | |
1700 | } | |
1fddef4b | 1701 | |
5ca666c7 | 1702 | /* disable single step if it was enabled */ |
3825b28f | 1703 | cpu_single_step(cpu, 0); |
bbd77c18 | 1704 | tb_flush(cpu); |
1fddef4b | 1705 | |
5ca666c7 AF |
1706 | if (sig != 0) { |
1707 | snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); | |
1708 | put_packet(s, buf); | |
1709 | } | |
1710 | /* put_packet() might have detected that the peer terminated the | |
1711 | connection. */ | |
1712 | if (s->fd < 0) { | |
1713 | return sig; | |
1714 | } | |
1fddef4b | 1715 | |
5ca666c7 AF |
1716 | sig = 0; |
1717 | s->state = RS_IDLE; | |
1718 | s->running_state = 0; | |
1719 | while (s->running_state == 0) { | |
1720 | n = read(s->fd, buf, 256); | |
1721 | if (n > 0) { | |
1722 | int i; | |
1723 | ||
1724 | for (i = 0; i < n; i++) { | |
1725 | gdb_read_byte(s, buf[i]); | |
1726 | } | |
5819e3e0 | 1727 | } else { |
5ca666c7 AF |
1728 | /* XXX: Connection closed. Should probably wait for another |
1729 | connection before continuing. */ | |
5819e3e0 PW |
1730 | if (n == 0) { |
1731 | close(s->fd); | |
1732 | } | |
1733 | s->fd = -1; | |
5ca666c7 | 1734 | return sig; |
1fddef4b | 1735 | } |
5ca666c7 AF |
1736 | } |
1737 | sig = s->signal; | |
1738 | s->signal = 0; | |
1739 | return sig; | |
1fddef4b | 1740 | } |
e9009676 | 1741 | |
ca587a8e | 1742 | /* Tell the remote gdb that the process has exited due to SIG. */ |
9349b4f9 | 1743 | void gdb_signalled(CPUArchState *env, int sig) |
ca587a8e | 1744 | { |
5ca666c7 AF |
1745 | GDBState *s; |
1746 | char buf[4]; | |
ca587a8e | 1747 | |
5ca666c7 AF |
1748 | s = gdbserver_state; |
1749 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1750 | return; | |
1751 | } | |
ca587a8e | 1752 | |
5ca666c7 AF |
1753 | snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig)); |
1754 | put_packet(s, buf); | |
ca587a8e | 1755 | } |
1fddef4b | 1756 | |
880a7578 | 1757 | static void gdb_accept(void) |
858693c6 FB |
1758 | { |
1759 | GDBState *s; | |
1760 | struct sockaddr_in sockaddr; | |
1761 | socklen_t len; | |
bf1c852a | 1762 | int fd; |
858693c6 FB |
1763 | |
1764 | for(;;) { | |
1765 | len = sizeof(sockaddr); | |
1766 | fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len); | |
1767 | if (fd < 0 && errno != EINTR) { | |
1768 | perror("accept"); | |
1769 | return; | |
1770 | } else if (fd >= 0) { | |
40ff6d7e KW |
1771 | #ifndef _WIN32 |
1772 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
1773 | #endif | |
b4608c04 FB |
1774 | break; |
1775 | } | |
1776 | } | |
858693c6 FB |
1777 | |
1778 | /* set short latency */ | |
bf1c852a | 1779 | socket_set_nodelay(fd); |
3b46e624 | 1780 | |
7267c094 | 1781 | s = g_malloc0(sizeof(GDBState)); |
2e0f2cfb AF |
1782 | s->c_cpu = first_cpu; |
1783 | s->g_cpu = first_cpu; | |
858693c6 | 1784 | s->fd = fd; |
5b50e790 | 1785 | gdb_has_xml = false; |
858693c6 | 1786 | |
880a7578 | 1787 | gdbserver_state = s; |
858693c6 FB |
1788 | } |
1789 | ||
1790 | static int gdbserver_open(int port) | |
1791 | { | |
1792 | struct sockaddr_in sockaddr; | |
6669ca13 | 1793 | int fd, ret; |
858693c6 FB |
1794 | |
1795 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
1796 | if (fd < 0) { | |
1797 | perror("socket"); | |
1798 | return -1; | |
1799 | } | |
40ff6d7e KW |
1800 | #ifndef _WIN32 |
1801 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
1802 | #endif | |
858693c6 | 1803 | |
6669ca13 | 1804 | socket_set_fast_reuse(fd); |
858693c6 FB |
1805 | |
1806 | sockaddr.sin_family = AF_INET; | |
1807 | sockaddr.sin_port = htons(port); | |
1808 | sockaddr.sin_addr.s_addr = 0; | |
1809 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
1810 | if (ret < 0) { | |
1811 | perror("bind"); | |
bb16172c | 1812 | close(fd); |
858693c6 FB |
1813 | return -1; |
1814 | } | |
96165b9e | 1815 | ret = listen(fd, 1); |
858693c6 FB |
1816 | if (ret < 0) { |
1817 | perror("listen"); | |
bb16172c | 1818 | close(fd); |
858693c6 FB |
1819 | return -1; |
1820 | } | |
858693c6 FB |
1821 | return fd; |
1822 | } | |
1823 | ||
1824 | int gdbserver_start(int port) | |
1825 | { | |
1826 | gdbserver_fd = gdbserver_open(port); | |
1827 | if (gdbserver_fd < 0) | |
1828 | return -1; | |
1829 | /* accept connections */ | |
880a7578 | 1830 | gdb_accept(); |
4046d913 PB |
1831 | return 0; |
1832 | } | |
2b1319c8 AJ |
1833 | |
1834 | /* Disable gdb stub for child processes. */ | |
f7ec7f7b | 1835 | void gdbserver_fork(CPUState *cpu) |
2b1319c8 AJ |
1836 | { |
1837 | GDBState *s = gdbserver_state; | |
75a34036 AF |
1838 | |
1839 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1840 | return; | |
1841 | } | |
2b1319c8 AJ |
1842 | close(s->fd); |
1843 | s->fd = -1; | |
b3310ab3 | 1844 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
75a34036 | 1845 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
2b1319c8 | 1846 | } |
1fddef4b | 1847 | #else |
aa1f17c1 | 1848 | static int gdb_chr_can_receive(void *opaque) |
4046d913 | 1849 | { |
56aebc89 PB |
1850 | /* We can handle an arbitrarily large amount of data. |
1851 | Pick the maximum packet size, which is as good as anything. */ | |
1852 | return MAX_PACKET_LENGTH; | |
4046d913 PB |
1853 | } |
1854 | ||
aa1f17c1 | 1855 | static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
4046d913 | 1856 | { |
4046d913 PB |
1857 | int i; |
1858 | ||
1859 | for (i = 0; i < size; i++) { | |
880a7578 | 1860 | gdb_read_byte(gdbserver_state, buf[i]); |
4046d913 PB |
1861 | } |
1862 | } | |
1863 | ||
1864 | static void gdb_chr_event(void *opaque, int event) | |
1865 | { | |
1866 | switch (event) { | |
b6b8df56 | 1867 | case CHR_EVENT_OPENED: |
0461d5a6 | 1868 | vm_stop(RUN_STATE_PAUSED); |
5b50e790 | 1869 | gdb_has_xml = false; |
4046d913 PB |
1870 | break; |
1871 | default: | |
1872 | break; | |
1873 | } | |
1874 | } | |
1875 | ||
8a34a0fb AL |
1876 | static void gdb_monitor_output(GDBState *s, const char *msg, int len) |
1877 | { | |
1878 | char buf[MAX_PACKET_LENGTH]; | |
1879 | ||
1880 | buf[0] = 'O'; | |
1881 | if (len > (MAX_PACKET_LENGTH/2) - 1) | |
1882 | len = (MAX_PACKET_LENGTH/2) - 1; | |
1883 | memtohex(buf + 1, (uint8_t *)msg, len); | |
1884 | put_packet(s, buf); | |
1885 | } | |
1886 | ||
0ec7b3e7 | 1887 | static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len) |
8a34a0fb AL |
1888 | { |
1889 | const char *p = (const char *)buf; | |
1890 | int max_sz; | |
1891 | ||
1892 | max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2; | |
1893 | for (;;) { | |
1894 | if (len <= max_sz) { | |
1895 | gdb_monitor_output(gdbserver_state, p, len); | |
1896 | break; | |
1897 | } | |
1898 | gdb_monitor_output(gdbserver_state, p, max_sz); | |
1899 | p += max_sz; | |
1900 | len -= max_sz; | |
1901 | } | |
1902 | return len; | |
1903 | } | |
1904 | ||
59030a8c AL |
1905 | #ifndef _WIN32 |
1906 | static void gdb_sigterm_handler(int signal) | |
1907 | { | |
1354869c | 1908 | if (runstate_is_running()) { |
0461d5a6 | 1909 | vm_stop(RUN_STATE_PAUSED); |
e07bbac5 | 1910 | } |
59030a8c AL |
1911 | } |
1912 | #endif | |
1913 | ||
777357d7 MAL |
1914 | static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend, |
1915 | bool *be_opened, Error **errp) | |
1916 | { | |
1917 | *be_opened = false; | |
1918 | } | |
1919 | ||
1920 | static void char_gdb_class_init(ObjectClass *oc, void *data) | |
1921 | { | |
1922 | ChardevClass *cc = CHARDEV_CLASS(oc); | |
1923 | ||
1924 | cc->internal = true; | |
1925 | cc->open = gdb_monitor_open; | |
1926 | cc->chr_write = gdb_monitor_write; | |
1927 | } | |
1928 | ||
1929 | #define TYPE_CHARDEV_GDB "chardev-gdb" | |
1930 | ||
1931 | static const TypeInfo char_gdb_type_info = { | |
1932 | .name = TYPE_CHARDEV_GDB, | |
1933 | .parent = TYPE_CHARDEV, | |
1934 | .class_init = char_gdb_class_init, | |
1935 | }; | |
1936 | ||
59030a8c | 1937 | int gdbserver_start(const char *device) |
4046d913 PB |
1938 | { |
1939 | GDBState *s; | |
59030a8c | 1940 | char gdbstub_device_name[128]; |
0ec7b3e7 MAL |
1941 | Chardev *chr = NULL; |
1942 | Chardev *mon_chr; | |
cfc3475a | 1943 | |
508b4ecc ZY |
1944 | if (!first_cpu) { |
1945 | error_report("gdbstub: meaningless to attach gdb to a " | |
1946 | "machine without any CPU."); | |
1947 | return -1; | |
1948 | } | |
1949 | ||
59030a8c AL |
1950 | if (!device) |
1951 | return -1; | |
1952 | if (strcmp(device, "none") != 0) { | |
1953 | if (strstart(device, "tcp:", NULL)) { | |
1954 | /* enforce required TCP attributes */ | |
1955 | snprintf(gdbstub_device_name, sizeof(gdbstub_device_name), | |
1956 | "%s,nowait,nodelay,server", device); | |
1957 | device = gdbstub_device_name; | |
36556b20 | 1958 | } |
59030a8c AL |
1959 | #ifndef _WIN32 |
1960 | else if (strcmp(device, "stdio") == 0) { | |
1961 | struct sigaction act; | |
4046d913 | 1962 | |
59030a8c AL |
1963 | memset(&act, 0, sizeof(act)); |
1964 | act.sa_handler = gdb_sigterm_handler; | |
1965 | sigaction(SIGINT, &act, NULL); | |
1966 | } | |
1967 | #endif | |
b4948be9 | 1968 | chr = qemu_chr_new_noreplay("gdb", device); |
36556b20 AL |
1969 | if (!chr) |
1970 | return -1; | |
cfc3475a PB |
1971 | } |
1972 | ||
36556b20 AL |
1973 | s = gdbserver_state; |
1974 | if (!s) { | |
7267c094 | 1975 | s = g_malloc0(sizeof(GDBState)); |
36556b20 | 1976 | gdbserver_state = s; |
4046d913 | 1977 | |
36556b20 AL |
1978 | qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL); |
1979 | ||
1980 | /* Initialize a monitor terminal for gdb */ | |
777357d7 MAL |
1981 | mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB, |
1982 | NULL, &error_abort); | |
36556b20 AL |
1983 | monitor_init(mon_chr, 0); |
1984 | } else { | |
1ce2610c | 1985 | qemu_chr_fe_deinit(&s->chr, true); |
36556b20 AL |
1986 | mon_chr = s->mon_chr; |
1987 | memset(s, 0, sizeof(GDBState)); | |
32a6ebec | 1988 | s->mon_chr = mon_chr; |
36556b20 | 1989 | } |
2e0f2cfb AF |
1990 | s->c_cpu = first_cpu; |
1991 | s->g_cpu = first_cpu; | |
32a6ebec MAL |
1992 | if (chr) { |
1993 | qemu_chr_fe_init(&s->chr, chr, &error_abort); | |
5345fdb4 | 1994 | qemu_chr_fe_set_handlers(&s->chr, gdb_chr_can_receive, gdb_chr_receive, |
81517ba3 | 1995 | gdb_chr_event, NULL, NULL, NULL, true); |
32a6ebec | 1996 | } |
36556b20 AL |
1997 | s->state = chr ? RS_IDLE : RS_INACTIVE; |
1998 | s->mon_chr = mon_chr; | |
cdb432b2 | 1999 | s->current_syscall_cb = NULL; |
8a34a0fb | 2000 | |
b4608c04 FB |
2001 | return 0; |
2002 | } | |
777357d7 MAL |
2003 | |
2004 | static void register_types(void) | |
2005 | { | |
2006 | type_register_static(&char_gdb_type_info); | |
2007 | } | |
2008 | ||
2009 | type_init(register_types); | |
4046d913 | 2010 | #endif |