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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" |
5c9522b3 | 23 | #include "trace-root.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" |
8f468636 | 32 | #include "hw/cpu/cluster.h" |
1fddef4b | 33 | #endif |
67b915a5 | 34 | |
56aebc89 PB |
35 | #define MAX_PACKET_LENGTH 4096 |
36 | ||
1de7afc9 | 37 | #include "qemu/sockets.h" |
b3946626 | 38 | #include "sysemu/hw_accel.h" |
9c17d615 | 39 | #include "sysemu/kvm.h" |
cfe67cef | 40 | #include "exec/semihost.h" |
63c91552 | 41 | #include "exec/exec-all.h" |
ca587a8e | 42 | |
a3919386 JK |
43 | #ifdef CONFIG_USER_ONLY |
44 | #define GDB_ATTACHED "0" | |
45 | #else | |
46 | #define GDB_ATTACHED "1" | |
47 | #endif | |
48 | ||
f3659eee AF |
49 | static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, |
50 | uint8_t *buf, int len, bool is_write) | |
44520db1 | 51 | { |
f3659eee AF |
52 | CPUClass *cc = CPU_GET_CLASS(cpu); |
53 | ||
54 | if (cc->memory_rw_debug) { | |
55 | return cc->memory_rw_debug(cpu, addr, buf, len, is_write); | |
56 | } | |
57 | return cpu_memory_rw_debug(cpu, addr, buf, len, is_write); | |
44520db1 | 58 | } |
ca587a8e | 59 | |
d2a6c857 AB |
60 | /* Return the GDB index for a given vCPU state. |
61 | * | |
62 | * For user mode this is simply the thread id. In system mode GDB | |
63 | * numbers CPUs from 1 as 0 is reserved as an "any cpu" index. | |
64 | */ | |
65 | static inline int cpu_gdb_index(CPUState *cpu) | |
66 | { | |
67 | #if defined(CONFIG_USER_ONLY) | |
bd88c780 AB |
68 | TaskState *ts = (TaskState *) cpu->opaque; |
69 | return ts->ts_tid; | |
d2a6c857 AB |
70 | #else |
71 | return cpu->cpu_index + 1; | |
72 | #endif | |
73 | } | |
74 | ||
ca587a8e AJ |
75 | enum { |
76 | GDB_SIGNAL_0 = 0, | |
77 | GDB_SIGNAL_INT = 2, | |
425189a8 | 78 | GDB_SIGNAL_QUIT = 3, |
ca587a8e | 79 | GDB_SIGNAL_TRAP = 5, |
425189a8 JK |
80 | GDB_SIGNAL_ABRT = 6, |
81 | GDB_SIGNAL_ALRM = 14, | |
82 | GDB_SIGNAL_IO = 23, | |
83 | GDB_SIGNAL_XCPU = 24, | |
ca587a8e AJ |
84 | GDB_SIGNAL_UNKNOWN = 143 |
85 | }; | |
86 | ||
87 | #ifdef CONFIG_USER_ONLY | |
88 | ||
89 | /* Map target signal numbers to GDB protocol signal numbers and vice | |
90 | * versa. For user emulation's currently supported systems, we can | |
91 | * assume most signals are defined. | |
92 | */ | |
93 | ||
94 | static int gdb_signal_table[] = { | |
95 | 0, | |
96 | TARGET_SIGHUP, | |
97 | TARGET_SIGINT, | |
98 | TARGET_SIGQUIT, | |
99 | TARGET_SIGILL, | |
100 | TARGET_SIGTRAP, | |
101 | TARGET_SIGABRT, | |
102 | -1, /* SIGEMT */ | |
103 | TARGET_SIGFPE, | |
104 | TARGET_SIGKILL, | |
105 | TARGET_SIGBUS, | |
106 | TARGET_SIGSEGV, | |
107 | TARGET_SIGSYS, | |
108 | TARGET_SIGPIPE, | |
109 | TARGET_SIGALRM, | |
110 | TARGET_SIGTERM, | |
111 | TARGET_SIGURG, | |
112 | TARGET_SIGSTOP, | |
113 | TARGET_SIGTSTP, | |
114 | TARGET_SIGCONT, | |
115 | TARGET_SIGCHLD, | |
116 | TARGET_SIGTTIN, | |
117 | TARGET_SIGTTOU, | |
118 | TARGET_SIGIO, | |
119 | TARGET_SIGXCPU, | |
120 | TARGET_SIGXFSZ, | |
121 | TARGET_SIGVTALRM, | |
122 | TARGET_SIGPROF, | |
123 | TARGET_SIGWINCH, | |
124 | -1, /* SIGLOST */ | |
125 | TARGET_SIGUSR1, | |
126 | TARGET_SIGUSR2, | |
c72d5bf8 | 127 | #ifdef TARGET_SIGPWR |
ca587a8e | 128 | TARGET_SIGPWR, |
c72d5bf8 BS |
129 | #else |
130 | -1, | |
131 | #endif | |
ca587a8e AJ |
132 | -1, /* SIGPOLL */ |
133 | -1, | |
134 | -1, | |
135 | -1, | |
136 | -1, | |
137 | -1, | |
138 | -1, | |
139 | -1, | |
140 | -1, | |
141 | -1, | |
142 | -1, | |
143 | -1, | |
c72d5bf8 | 144 | #ifdef __SIGRTMIN |
ca587a8e AJ |
145 | __SIGRTMIN + 1, |
146 | __SIGRTMIN + 2, | |
147 | __SIGRTMIN + 3, | |
148 | __SIGRTMIN + 4, | |
149 | __SIGRTMIN + 5, | |
150 | __SIGRTMIN + 6, | |
151 | __SIGRTMIN + 7, | |
152 | __SIGRTMIN + 8, | |
153 | __SIGRTMIN + 9, | |
154 | __SIGRTMIN + 10, | |
155 | __SIGRTMIN + 11, | |
156 | __SIGRTMIN + 12, | |
157 | __SIGRTMIN + 13, | |
158 | __SIGRTMIN + 14, | |
159 | __SIGRTMIN + 15, | |
160 | __SIGRTMIN + 16, | |
161 | __SIGRTMIN + 17, | |
162 | __SIGRTMIN + 18, | |
163 | __SIGRTMIN + 19, | |
164 | __SIGRTMIN + 20, | |
165 | __SIGRTMIN + 21, | |
166 | __SIGRTMIN + 22, | |
167 | __SIGRTMIN + 23, | |
168 | __SIGRTMIN + 24, | |
169 | __SIGRTMIN + 25, | |
170 | __SIGRTMIN + 26, | |
171 | __SIGRTMIN + 27, | |
172 | __SIGRTMIN + 28, | |
173 | __SIGRTMIN + 29, | |
174 | __SIGRTMIN + 30, | |
175 | __SIGRTMIN + 31, | |
176 | -1, /* SIGCANCEL */ | |
177 | __SIGRTMIN, | |
178 | __SIGRTMIN + 32, | |
179 | __SIGRTMIN + 33, | |
180 | __SIGRTMIN + 34, | |
181 | __SIGRTMIN + 35, | |
182 | __SIGRTMIN + 36, | |
183 | __SIGRTMIN + 37, | |
184 | __SIGRTMIN + 38, | |
185 | __SIGRTMIN + 39, | |
186 | __SIGRTMIN + 40, | |
187 | __SIGRTMIN + 41, | |
188 | __SIGRTMIN + 42, | |
189 | __SIGRTMIN + 43, | |
190 | __SIGRTMIN + 44, | |
191 | __SIGRTMIN + 45, | |
192 | __SIGRTMIN + 46, | |
193 | __SIGRTMIN + 47, | |
194 | __SIGRTMIN + 48, | |
195 | __SIGRTMIN + 49, | |
196 | __SIGRTMIN + 50, | |
197 | __SIGRTMIN + 51, | |
198 | __SIGRTMIN + 52, | |
199 | __SIGRTMIN + 53, | |
200 | __SIGRTMIN + 54, | |
201 | __SIGRTMIN + 55, | |
202 | __SIGRTMIN + 56, | |
203 | __SIGRTMIN + 57, | |
204 | __SIGRTMIN + 58, | |
205 | __SIGRTMIN + 59, | |
206 | __SIGRTMIN + 60, | |
207 | __SIGRTMIN + 61, | |
208 | __SIGRTMIN + 62, | |
209 | __SIGRTMIN + 63, | |
210 | __SIGRTMIN + 64, | |
211 | __SIGRTMIN + 65, | |
212 | __SIGRTMIN + 66, | |
213 | __SIGRTMIN + 67, | |
214 | __SIGRTMIN + 68, | |
215 | __SIGRTMIN + 69, | |
216 | __SIGRTMIN + 70, | |
217 | __SIGRTMIN + 71, | |
218 | __SIGRTMIN + 72, | |
219 | __SIGRTMIN + 73, | |
220 | __SIGRTMIN + 74, | |
221 | __SIGRTMIN + 75, | |
222 | __SIGRTMIN + 76, | |
223 | __SIGRTMIN + 77, | |
224 | __SIGRTMIN + 78, | |
225 | __SIGRTMIN + 79, | |
226 | __SIGRTMIN + 80, | |
227 | __SIGRTMIN + 81, | |
228 | __SIGRTMIN + 82, | |
229 | __SIGRTMIN + 83, | |
230 | __SIGRTMIN + 84, | |
231 | __SIGRTMIN + 85, | |
232 | __SIGRTMIN + 86, | |
233 | __SIGRTMIN + 87, | |
234 | __SIGRTMIN + 88, | |
235 | __SIGRTMIN + 89, | |
236 | __SIGRTMIN + 90, | |
237 | __SIGRTMIN + 91, | |
238 | __SIGRTMIN + 92, | |
239 | __SIGRTMIN + 93, | |
240 | __SIGRTMIN + 94, | |
241 | __SIGRTMIN + 95, | |
242 | -1, /* SIGINFO */ | |
243 | -1, /* UNKNOWN */ | |
244 | -1, /* DEFAULT */ | |
245 | -1, | |
246 | -1, | |
247 | -1, | |
248 | -1, | |
249 | -1, | |
250 | -1 | |
c72d5bf8 | 251 | #endif |
ca587a8e | 252 | }; |
8f447cc7 | 253 | #else |
ca587a8e AJ |
254 | /* In system mode we only need SIGINT and SIGTRAP; other signals |
255 | are not yet supported. */ | |
256 | ||
257 | enum { | |
258 | TARGET_SIGINT = 2, | |
259 | TARGET_SIGTRAP = 5 | |
260 | }; | |
261 | ||
262 | static int gdb_signal_table[] = { | |
263 | -1, | |
264 | -1, | |
265 | TARGET_SIGINT, | |
266 | -1, | |
267 | -1, | |
268 | TARGET_SIGTRAP | |
269 | }; | |
270 | #endif | |
271 | ||
272 | #ifdef CONFIG_USER_ONLY | |
273 | static int target_signal_to_gdb (int sig) | |
274 | { | |
275 | int i; | |
276 | for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++) | |
277 | if (gdb_signal_table[i] == sig) | |
278 | return i; | |
279 | return GDB_SIGNAL_UNKNOWN; | |
280 | } | |
8f447cc7 | 281 | #endif |
b4608c04 | 282 | |
ca587a8e AJ |
283 | static int gdb_signal_to_target (int sig) |
284 | { | |
285 | if (sig < ARRAY_SIZE (gdb_signal_table)) | |
286 | return gdb_signal_table[sig]; | |
287 | else | |
288 | return -1; | |
289 | } | |
290 | ||
56aebc89 PB |
291 | typedef struct GDBRegisterState { |
292 | int base_reg; | |
293 | int num_regs; | |
294 | gdb_reg_cb get_reg; | |
295 | gdb_reg_cb set_reg; | |
296 | const char *xml; | |
297 | struct GDBRegisterState *next; | |
298 | } GDBRegisterState; | |
299 | ||
8f468636 LM |
300 | typedef struct GDBProcess { |
301 | uint32_t pid; | |
302 | bool attached; | |
303 | } GDBProcess; | |
304 | ||
858693c6 | 305 | enum RSState { |
36556b20 | 306 | RS_INACTIVE, |
858693c6 FB |
307 | RS_IDLE, |
308 | RS_GETLINE, | |
4bf43122 DG |
309 | RS_GETLINE_ESC, |
310 | RS_GETLINE_RLE, | |
858693c6 FB |
311 | RS_CHKSUM1, |
312 | RS_CHKSUM2, | |
313 | }; | |
858693c6 | 314 | typedef struct GDBState { |
2e0f2cfb AF |
315 | CPUState *c_cpu; /* current CPU for step/continue ops */ |
316 | CPUState *g_cpu; /* current CPU for other ops */ | |
52f34623 | 317 | CPUState *query_cpu; /* for q{f|s}ThreadInfo */ |
41625033 | 318 | enum RSState state; /* parsing state */ |
56aebc89 | 319 | char line_buf[MAX_PACKET_LENGTH]; |
858693c6 | 320 | int line_buf_index; |
4bf43122 DG |
321 | int line_sum; /* running checksum */ |
322 | int line_csum; /* checksum at the end of the packet */ | |
56aebc89 | 323 | uint8_t last_packet[MAX_PACKET_LENGTH + 4]; |
4046d913 | 324 | int last_packet_len; |
1f487ee9 | 325 | int signal; |
41625033 | 326 | #ifdef CONFIG_USER_ONLY |
4046d913 | 327 | int fd; |
41625033 | 328 | int running_state; |
4046d913 | 329 | #else |
32a6ebec | 330 | CharBackend chr; |
0ec7b3e7 | 331 | Chardev *mon_chr; |
41625033 | 332 | #endif |
8f468636 LM |
333 | bool multiprocess; |
334 | GDBProcess *processes; | |
335 | int process_num; | |
cdb432b2 MI |
336 | char syscall_buf[256]; |
337 | gdb_syscall_complete_cb current_syscall_cb; | |
858693c6 | 338 | } GDBState; |
b4608c04 | 339 | |
60897d36 EI |
340 | /* By default use no IRQs and no timers while single stepping so as to |
341 | * make single stepping like an ICE HW step. | |
342 | */ | |
343 | static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; | |
344 | ||
880a7578 AL |
345 | static GDBState *gdbserver_state; |
346 | ||
5b50e790 | 347 | bool gdb_has_xml; |
56aebc89 | 348 | |
1fddef4b | 349 | #ifdef CONFIG_USER_ONLY |
4046d913 PB |
350 | /* XXX: This is not thread safe. Do we care? */ |
351 | static int gdbserver_fd = -1; | |
352 | ||
858693c6 | 353 | static int get_char(GDBState *s) |
b4608c04 FB |
354 | { |
355 | uint8_t ch; | |
356 | int ret; | |
357 | ||
358 | for(;;) { | |
00aa0040 | 359 | ret = qemu_recv(s->fd, &ch, 1, 0); |
b4608c04 | 360 | if (ret < 0) { |
1f487ee9 EI |
361 | if (errno == ECONNRESET) |
362 | s->fd = -1; | |
5819e3e0 | 363 | if (errno != EINTR) |
b4608c04 FB |
364 | return -1; |
365 | } else if (ret == 0) { | |
1f487ee9 EI |
366 | close(s->fd); |
367 | s->fd = -1; | |
b4608c04 FB |
368 | return -1; |
369 | } else { | |
370 | break; | |
371 | } | |
372 | } | |
373 | return ch; | |
374 | } | |
4046d913 | 375 | #endif |
b4608c04 | 376 | |
654efcf3 | 377 | static enum { |
a2d1ebaf PB |
378 | GDB_SYS_UNKNOWN, |
379 | GDB_SYS_ENABLED, | |
380 | GDB_SYS_DISABLED, | |
381 | } gdb_syscall_mode; | |
382 | ||
a38bb079 | 383 | /* Decide if either remote gdb syscalls or native file IO should be used. */ |
a2d1ebaf PB |
384 | int use_gdb_syscalls(void) |
385 | { | |
cfe67cef LA |
386 | SemihostingTarget target = semihosting_get_target(); |
387 | if (target == SEMIHOSTING_TARGET_NATIVE) { | |
a38bb079 LI |
388 | /* -semihosting-config target=native */ |
389 | return false; | |
cfe67cef | 390 | } else if (target == SEMIHOSTING_TARGET_GDB) { |
a38bb079 LI |
391 | /* -semihosting-config target=gdb */ |
392 | return true; | |
393 | } | |
394 | ||
395 | /* -semihosting-config target=auto */ | |
396 | /* On the first call check if gdb is connected and remember. */ | |
a2d1ebaf | 397 | if (gdb_syscall_mode == GDB_SYS_UNKNOWN) { |
880a7578 AL |
398 | gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED |
399 | : GDB_SYS_DISABLED); | |
a2d1ebaf PB |
400 | } |
401 | return gdb_syscall_mode == GDB_SYS_ENABLED; | |
402 | } | |
403 | ||
ba70a624 EI |
404 | /* Resume execution. */ |
405 | static inline void gdb_continue(GDBState *s) | |
406 | { | |
5c9522b3 | 407 | |
ba70a624 EI |
408 | #ifdef CONFIG_USER_ONLY |
409 | s->running_state = 1; | |
5c9522b3 | 410 | trace_gdbstub_op_continue(); |
ba70a624 | 411 | #else |
26ac7a31 | 412 | if (!runstate_needs_reset()) { |
5c9522b3 | 413 | trace_gdbstub_op_continue(); |
87f25c12 PB |
414 | vm_start(); |
415 | } | |
ba70a624 EI |
416 | #endif |
417 | } | |
418 | ||
544177ad CI |
419 | /* |
420 | * Resume execution, per CPU actions. For user-mode emulation it's | |
421 | * equivalent to gdb_continue. | |
422 | */ | |
423 | static int gdb_continue_partial(GDBState *s, char *newstates) | |
424 | { | |
425 | CPUState *cpu; | |
426 | int res = 0; | |
427 | #ifdef CONFIG_USER_ONLY | |
428 | /* | |
429 | * This is not exactly accurate, but it's an improvement compared to the | |
430 | * previous situation, where only one CPU would be single-stepped. | |
431 | */ | |
432 | CPU_FOREACH(cpu) { | |
433 | if (newstates[cpu->cpu_index] == 's') { | |
5c9522b3 | 434 | trace_gdbstub_op_stepping(cpu->cpu_index); |
544177ad CI |
435 | cpu_single_step(cpu, sstep_flags); |
436 | } | |
437 | } | |
438 | s->running_state = 1; | |
439 | #else | |
440 | int flag = 0; | |
441 | ||
442 | if (!runstate_needs_reset()) { | |
443 | if (vm_prepare_start()) { | |
444 | return 0; | |
445 | } | |
446 | ||
447 | CPU_FOREACH(cpu) { | |
448 | switch (newstates[cpu->cpu_index]) { | |
449 | case 0: | |
450 | case 1: | |
451 | break; /* nothing to do here */ | |
452 | case 's': | |
5c9522b3 | 453 | trace_gdbstub_op_stepping(cpu->cpu_index); |
544177ad CI |
454 | cpu_single_step(cpu, sstep_flags); |
455 | cpu_resume(cpu); | |
456 | flag = 1; | |
457 | break; | |
458 | case 'c': | |
5c9522b3 | 459 | trace_gdbstub_op_continue_cpu(cpu->cpu_index); |
544177ad CI |
460 | cpu_resume(cpu); |
461 | flag = 1; | |
462 | break; | |
463 | default: | |
464 | res = -1; | |
465 | break; | |
466 | } | |
467 | } | |
468 | } | |
469 | if (flag) { | |
470 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); | |
471 | } | |
472 | #endif | |
473 | return res; | |
474 | } | |
475 | ||
858693c6 | 476 | static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
b4608c04 | 477 | { |
4046d913 | 478 | #ifdef CONFIG_USER_ONLY |
b4608c04 FB |
479 | int ret; |
480 | ||
481 | while (len > 0) { | |
8f447cc7 | 482 | ret = send(s->fd, buf, len, 0); |
b4608c04 | 483 | if (ret < 0) { |
5819e3e0 | 484 | if (errno != EINTR) |
b4608c04 FB |
485 | return; |
486 | } else { | |
487 | buf += ret; | |
488 | len -= ret; | |
489 | } | |
490 | } | |
4046d913 | 491 | #else |
6ab3fc32 DB |
492 | /* XXX this blocks entire thread. Rewrite to use |
493 | * qemu_chr_fe_write and background I/O callbacks */ | |
5345fdb4 | 494 | qemu_chr_fe_write_all(&s->chr, buf, len); |
4046d913 | 495 | #endif |
b4608c04 FB |
496 | } |
497 | ||
498 | static inline int fromhex(int v) | |
499 | { | |
500 | if (v >= '0' && v <= '9') | |
501 | return v - '0'; | |
502 | else if (v >= 'A' && v <= 'F') | |
503 | return v - 'A' + 10; | |
504 | else if (v >= 'a' && v <= 'f') | |
505 | return v - 'a' + 10; | |
506 | else | |
507 | return 0; | |
508 | } | |
509 | ||
510 | static inline int tohex(int v) | |
511 | { | |
512 | if (v < 10) | |
513 | return v + '0'; | |
514 | else | |
515 | return v - 10 + 'a'; | |
516 | } | |
517 | ||
9005774b | 518 | /* writes 2*len+1 bytes in buf */ |
b4608c04 FB |
519 | static void memtohex(char *buf, const uint8_t *mem, int len) |
520 | { | |
521 | int i, c; | |
522 | char *q; | |
523 | q = buf; | |
524 | for(i = 0; i < len; i++) { | |
525 | c = mem[i]; | |
526 | *q++ = tohex(c >> 4); | |
527 | *q++ = tohex(c & 0xf); | |
528 | } | |
529 | *q = '\0'; | |
530 | } | |
531 | ||
532 | static void hextomem(uint8_t *mem, const char *buf, int len) | |
533 | { | |
534 | int i; | |
535 | ||
536 | for(i = 0; i < len; i++) { | |
537 | mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); | |
538 | buf += 2; | |
539 | } | |
540 | } | |
541 | ||
5c9522b3 DG |
542 | static void hexdump(const char *buf, int len, |
543 | void (*trace_fn)(size_t ofs, char const *text)) | |
544 | { | |
545 | char line_buffer[3 * 16 + 4 + 16 + 1]; | |
546 | ||
547 | size_t i; | |
548 | for (i = 0; i < len || (i & 0xF); ++i) { | |
549 | size_t byte_ofs = i & 15; | |
550 | ||
551 | if (byte_ofs == 0) { | |
552 | memset(line_buffer, ' ', 3 * 16 + 4 + 16); | |
553 | line_buffer[3 * 16 + 4 + 16] = 0; | |
554 | } | |
555 | ||
556 | size_t col_group = (i >> 2) & 3; | |
557 | size_t hex_col = byte_ofs * 3 + col_group; | |
558 | size_t txt_col = 3 * 16 + 4 + byte_ofs; | |
559 | ||
560 | if (i < len) { | |
561 | char value = buf[i]; | |
562 | ||
563 | line_buffer[hex_col + 0] = tohex((value >> 4) & 0xF); | |
564 | line_buffer[hex_col + 1] = tohex((value >> 0) & 0xF); | |
565 | line_buffer[txt_col + 0] = (value >= ' ' && value < 127) | |
566 | ? value | |
567 | : '.'; | |
568 | } | |
569 | ||
570 | if (byte_ofs == 0xF) | |
571 | trace_fn(i & -16, line_buffer); | |
572 | } | |
573 | } | |
574 | ||
b4608c04 | 575 | /* return -1 if error, 0 if OK */ |
5c9522b3 | 576 | static int put_packet_binary(GDBState *s, const char *buf, int len, bool dump) |
b4608c04 | 577 | { |
56aebc89 | 578 | int csum, i; |
60fe76f3 | 579 | uint8_t *p; |
b4608c04 | 580 | |
5c9522b3 DG |
581 | if (dump && trace_event_get_state_backends(TRACE_GDBSTUB_IO_BINARYREPLY)) { |
582 | hexdump(buf, len, trace_gdbstub_io_binaryreply); | |
583 | } | |
584 | ||
b4608c04 | 585 | for(;;) { |
4046d913 PB |
586 | p = s->last_packet; |
587 | *(p++) = '$'; | |
4046d913 PB |
588 | memcpy(p, buf, len); |
589 | p += len; | |
b4608c04 FB |
590 | csum = 0; |
591 | for(i = 0; i < len; i++) { | |
592 | csum += buf[i]; | |
593 | } | |
4046d913 PB |
594 | *(p++) = '#'; |
595 | *(p++) = tohex((csum >> 4) & 0xf); | |
596 | *(p++) = tohex((csum) & 0xf); | |
b4608c04 | 597 | |
4046d913 | 598 | s->last_packet_len = p - s->last_packet; |
ffe8ab83 | 599 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
b4608c04 | 600 | |
4046d913 PB |
601 | #ifdef CONFIG_USER_ONLY |
602 | i = get_char(s); | |
603 | if (i < 0) | |
b4608c04 | 604 | return -1; |
4046d913 | 605 | if (i == '+') |
b4608c04 | 606 | break; |
4046d913 PB |
607 | #else |
608 | break; | |
609 | #endif | |
b4608c04 FB |
610 | } |
611 | return 0; | |
612 | } | |
613 | ||
56aebc89 PB |
614 | /* return -1 if error, 0 if OK */ |
615 | static int put_packet(GDBState *s, const char *buf) | |
616 | { | |
5c9522b3 | 617 | trace_gdbstub_io_reply(buf); |
79808573 | 618 | |
5c9522b3 | 619 | return put_packet_binary(s, buf, strlen(buf), false); |
56aebc89 PB |
620 | } |
621 | ||
56aebc89 PB |
622 | /* Encode data using the encoding for 'x' packets. */ |
623 | static int memtox(char *buf, const char *mem, int len) | |
624 | { | |
625 | char *p = buf; | |
626 | char c; | |
627 | ||
628 | while (len--) { | |
629 | c = *(mem++); | |
630 | switch (c) { | |
631 | case '#': case '$': case '*': case '}': | |
632 | *(p++) = '}'; | |
633 | *(p++) = c ^ 0x20; | |
634 | break; | |
635 | default: | |
636 | *(p++) = c; | |
637 | break; | |
638 | } | |
639 | } | |
640 | return p - buf; | |
641 | } | |
f1ccf904 | 642 | |
1a227336 LM |
643 | static uint32_t gdb_get_cpu_pid(const GDBState *s, CPUState *cpu) |
644 | { | |
645 | #ifndef CONFIG_USER_ONLY | |
646 | gchar *path, *name = NULL; | |
647 | Object *obj; | |
648 | CPUClusterState *cluster; | |
649 | uint32_t ret; | |
650 | ||
651 | path = object_get_canonical_path(OBJECT(cpu)); | |
652 | ||
653 | if (path == NULL) { | |
654 | /* Return the default process' PID */ | |
655 | ret = s->processes[s->process_num - 1].pid; | |
656 | goto out; | |
657 | } | |
658 | ||
659 | name = object_get_canonical_path_component(OBJECT(cpu)); | |
660 | assert(name != NULL); | |
661 | ||
662 | /* | |
663 | * Retrieve the CPU parent path by removing the last '/' and the CPU name | |
664 | * from the CPU canonical path. | |
665 | */ | |
666 | path[strlen(path) - strlen(name) - 1] = '\0'; | |
667 | ||
668 | obj = object_resolve_path_type(path, TYPE_CPU_CLUSTER, NULL); | |
669 | ||
670 | if (obj == NULL) { | |
671 | /* Return the default process' PID */ | |
672 | ret = s->processes[s->process_num - 1].pid; | |
673 | goto out; | |
674 | } | |
675 | ||
676 | cluster = CPU_CLUSTER(obj); | |
677 | ret = cluster->cluster_id + 1; | |
678 | ||
679 | out: | |
680 | g_free(name); | |
681 | g_free(path); | |
682 | ||
683 | return ret; | |
684 | ||
685 | #else | |
686 | /* TODO: In user mode, we should use the task state PID */ | |
687 | return s->processes[s->process_num - 1].pid; | |
688 | #endif | |
689 | } | |
690 | ||
7d8c87da LM |
691 | static GDBProcess *gdb_get_process(const GDBState *s, uint32_t pid) |
692 | { | |
693 | int i; | |
694 | ||
695 | if (!pid) { | |
696 | /* 0 means any process, we take the first one */ | |
697 | return &s->processes[0]; | |
698 | } | |
699 | ||
700 | for (i = 0; i < s->process_num; i++) { | |
701 | if (s->processes[i].pid == pid) { | |
702 | return &s->processes[i]; | |
703 | } | |
704 | } | |
705 | ||
706 | return NULL; | |
707 | } | |
708 | ||
709 | static GDBProcess *gdb_get_cpu_process(const GDBState *s, CPUState *cpu) | |
710 | { | |
711 | return gdb_get_process(s, gdb_get_cpu_pid(s, cpu)); | |
712 | } | |
713 | ||
714 | static CPUState *find_cpu(uint32_t thread_id) | |
715 | { | |
716 | CPUState *cpu; | |
717 | ||
718 | CPU_FOREACH(cpu) { | |
719 | if (cpu_gdb_index(cpu) == thread_id) { | |
720 | return cpu; | |
721 | } | |
722 | } | |
723 | ||
724 | return NULL; | |
725 | } | |
726 | ||
727 | static CPUState *gdb_get_cpu(const GDBState *s, uint32_t pid, uint32_t tid) | |
728 | { | |
729 | GDBProcess *process; | |
730 | CPUState *cpu; | |
731 | ||
732 | if (!tid) { | |
733 | /* 0 means any thread, we take the first one */ | |
734 | tid = 1; | |
735 | } | |
736 | ||
737 | cpu = find_cpu(tid); | |
738 | ||
739 | if (cpu == NULL) { | |
740 | return NULL; | |
741 | } | |
742 | ||
743 | process = gdb_get_cpu_process(s, cpu); | |
744 | ||
745 | if (process->pid != pid) { | |
746 | return NULL; | |
747 | } | |
748 | ||
749 | if (!process->attached) { | |
750 | return NULL; | |
751 | } | |
752 | ||
753 | return cpu; | |
754 | } | |
755 | ||
5b24c641 AF |
756 | static const char *get_feature_xml(const char *p, const char **newp, |
757 | CPUClass *cc) | |
56aebc89 | 758 | { |
56aebc89 PB |
759 | size_t len; |
760 | int i; | |
761 | const char *name; | |
762 | static char target_xml[1024]; | |
763 | ||
764 | len = 0; | |
765 | while (p[len] && p[len] != ':') | |
766 | len++; | |
767 | *newp = p + len; | |
768 | ||
769 | name = NULL; | |
770 | if (strncmp(p, "target.xml", len) == 0) { | |
771 | /* Generate the XML description for this CPU. */ | |
772 | if (!target_xml[0]) { | |
773 | GDBRegisterState *r; | |
eac8b355 | 774 | CPUState *cpu = first_cpu; |
56aebc89 | 775 | |
b3820e6c DH |
776 | pstrcat(target_xml, sizeof(target_xml), |
777 | "<?xml version=\"1.0\"?>" | |
778 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">" | |
779 | "<target>"); | |
780 | if (cc->gdb_arch_name) { | |
781 | gchar *arch = cc->gdb_arch_name(cpu); | |
782 | pstrcat(target_xml, sizeof(target_xml), "<architecture>"); | |
783 | pstrcat(target_xml, sizeof(target_xml), arch); | |
784 | pstrcat(target_xml, sizeof(target_xml), "</architecture>"); | |
785 | g_free(arch); | |
786 | } | |
787 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); | |
788 | pstrcat(target_xml, sizeof(target_xml), cc->gdb_core_xml_file); | |
789 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
eac8b355 | 790 | for (r = cpu->gdb_regs; r; r = r->next) { |
2dc766da BS |
791 | pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); |
792 | pstrcat(target_xml, sizeof(target_xml), r->xml); | |
793 | pstrcat(target_xml, sizeof(target_xml), "\"/>"); | |
56aebc89 | 794 | } |
2dc766da | 795 | pstrcat(target_xml, sizeof(target_xml), "</target>"); |
56aebc89 PB |
796 | } |
797 | return target_xml; | |
798 | } | |
200bf5b7 AB |
799 | if (cc->gdb_get_dynamic_xml) { |
800 | CPUState *cpu = first_cpu; | |
801 | char *xmlname = g_strndup(p, len); | |
802 | const char *xml = cc->gdb_get_dynamic_xml(cpu, xmlname); | |
803 | ||
804 | g_free(xmlname); | |
805 | if (xml) { | |
806 | return xml; | |
807 | } | |
808 | } | |
56aebc89 PB |
809 | for (i = 0; ; i++) { |
810 | name = xml_builtin[i][0]; | |
811 | if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) | |
812 | break; | |
813 | } | |
814 | return name ? xml_builtin[i][1] : NULL; | |
815 | } | |
f1ccf904 | 816 | |
385b9f0e | 817 | static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
56aebc89 | 818 | { |
a0e372f0 | 819 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 820 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 821 | GDBRegisterState *r; |
f1ccf904 | 822 | |
a0e372f0 | 823 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 824 | return cc->gdb_read_register(cpu, mem_buf, reg); |
a0e372f0 | 825 | } |
f1ccf904 | 826 | |
eac8b355 | 827 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
828 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
829 | return r->get_reg(env, mem_buf, reg - r->base_reg); | |
830 | } | |
831 | } | |
832 | return 0; | |
f1ccf904 TS |
833 | } |
834 | ||
385b9f0e | 835 | static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
f1ccf904 | 836 | { |
a0e372f0 | 837 | CPUClass *cc = CPU_GET_CLASS(cpu); |
385b9f0e | 838 | CPUArchState *env = cpu->env_ptr; |
56aebc89 | 839 | GDBRegisterState *r; |
f1ccf904 | 840 | |
a0e372f0 | 841 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 842 | return cc->gdb_write_register(cpu, mem_buf, reg); |
a0e372f0 | 843 | } |
56aebc89 | 844 | |
eac8b355 | 845 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
846 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
847 | return r->set_reg(env, mem_buf, reg - r->base_reg); | |
848 | } | |
849 | } | |
6da41eaf FB |
850 | return 0; |
851 | } | |
852 | ||
56aebc89 PB |
853 | /* Register a supplemental set of CPU registers. If g_pos is nonzero it |
854 | specifies the first register number and these registers are included in | |
855 | a standard "g" packet. Direction is relative to gdb, i.e. get_reg is | |
856 | gdb reading a CPU register, and set_reg is gdb modifying a CPU register. | |
857 | */ | |
858 | ||
22169d41 AF |
859 | void gdb_register_coprocessor(CPUState *cpu, |
860 | gdb_reg_cb get_reg, gdb_reg_cb set_reg, | |
861 | int num_regs, const char *xml, int g_pos) | |
6da41eaf | 862 | { |
56aebc89 PB |
863 | GDBRegisterState *s; |
864 | GDBRegisterState **p; | |
56aebc89 | 865 | |
eac8b355 | 866 | p = &cpu->gdb_regs; |
56aebc89 PB |
867 | while (*p) { |
868 | /* Check for duplicates. */ | |
869 | if (strcmp((*p)->xml, xml) == 0) | |
870 | return; | |
871 | p = &(*p)->next; | |
872 | } | |
9643c25f SW |
873 | |
874 | s = g_new0(GDBRegisterState, 1); | |
a0e372f0 | 875 | s->base_reg = cpu->gdb_num_regs; |
9643c25f SW |
876 | s->num_regs = num_regs; |
877 | s->get_reg = get_reg; | |
878 | s->set_reg = set_reg; | |
879 | s->xml = xml; | |
880 | ||
56aebc89 | 881 | /* Add to end of list. */ |
a0e372f0 | 882 | cpu->gdb_num_regs += num_regs; |
56aebc89 PB |
883 | *p = s; |
884 | if (g_pos) { | |
885 | if (g_pos != s->base_reg) { | |
7ae6c571 ZY |
886 | error_report("Error: Bad gdb register numbering for '%s', " |
887 | "expected %d got %d", xml, g_pos, s->base_reg); | |
35143f01 AF |
888 | } else { |
889 | cpu->gdb_num_g_regs = cpu->gdb_num_regs; | |
56aebc89 PB |
890 | } |
891 | } | |
6da41eaf FB |
892 | } |
893 | ||
a1d1bb31 | 894 | #ifndef CONFIG_USER_ONLY |
2472b6c0 PM |
895 | /* Translate GDB watchpoint type to a flags value for cpu_watchpoint_* */ |
896 | static inline int xlat_gdb_type(CPUState *cpu, int gdbtype) | |
897 | { | |
898 | static const int xlat[] = { | |
899 | [GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, | |
900 | [GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, | |
901 | [GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, | |
902 | }; | |
903 | ||
904 | CPUClass *cc = CPU_GET_CLASS(cpu); | |
905 | int cputype = xlat[gdbtype]; | |
906 | ||
907 | if (cc->gdb_stop_before_watchpoint) { | |
908 | cputype |= BP_STOP_BEFORE_ACCESS; | |
909 | } | |
910 | return cputype; | |
911 | } | |
a1d1bb31 AL |
912 | #endif |
913 | ||
880a7578 | 914 | static int gdb_breakpoint_insert(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 915 | { |
182735ef | 916 | CPUState *cpu; |
880a7578 AL |
917 | int err = 0; |
918 | ||
62278814 | 919 | if (kvm_enabled()) { |
2e0f2cfb | 920 | return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 921 | } |
e22a25c9 | 922 | |
a1d1bb31 AL |
923 | switch (type) { |
924 | case GDB_BREAKPOINT_SW: | |
925 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 926 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
927 | err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL); |
928 | if (err) { | |
880a7578 | 929 | break; |
b3310ab3 | 930 | } |
880a7578 AL |
931 | } |
932 | return err; | |
a1d1bb31 AL |
933 | #ifndef CONFIG_USER_ONLY |
934 | case GDB_WATCHPOINT_WRITE: | |
935 | case GDB_WATCHPOINT_READ: | |
936 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 937 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
938 | err = cpu_watchpoint_insert(cpu, addr, len, |
939 | xlat_gdb_type(cpu, type), NULL); | |
940 | if (err) { | |
880a7578 | 941 | break; |
2472b6c0 | 942 | } |
880a7578 AL |
943 | } |
944 | return err; | |
a1d1bb31 AL |
945 | #endif |
946 | default: | |
947 | return -ENOSYS; | |
948 | } | |
949 | } | |
950 | ||
880a7578 | 951 | static int gdb_breakpoint_remove(target_ulong addr, target_ulong len, int type) |
a1d1bb31 | 952 | { |
182735ef | 953 | CPUState *cpu; |
880a7578 AL |
954 | int err = 0; |
955 | ||
62278814 | 956 | if (kvm_enabled()) { |
2e0f2cfb | 957 | return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type); |
62278814 | 958 | } |
e22a25c9 | 959 | |
a1d1bb31 AL |
960 | switch (type) { |
961 | case GDB_BREAKPOINT_SW: | |
962 | case GDB_BREAKPOINT_HW: | |
bdc44640 | 963 | CPU_FOREACH(cpu) { |
b3310ab3 AF |
964 | err = cpu_breakpoint_remove(cpu, addr, BP_GDB); |
965 | if (err) { | |
880a7578 | 966 | break; |
b3310ab3 | 967 | } |
880a7578 AL |
968 | } |
969 | return err; | |
a1d1bb31 AL |
970 | #ifndef CONFIG_USER_ONLY |
971 | case GDB_WATCHPOINT_WRITE: | |
972 | case GDB_WATCHPOINT_READ: | |
973 | case GDB_WATCHPOINT_ACCESS: | |
bdc44640 | 974 | CPU_FOREACH(cpu) { |
2472b6c0 PM |
975 | err = cpu_watchpoint_remove(cpu, addr, len, |
976 | xlat_gdb_type(cpu, type)); | |
880a7578 AL |
977 | if (err) |
978 | break; | |
979 | } | |
980 | return err; | |
a1d1bb31 AL |
981 | #endif |
982 | default: | |
983 | return -ENOSYS; | |
984 | } | |
985 | } | |
986 | ||
880a7578 | 987 | static void gdb_breakpoint_remove_all(void) |
a1d1bb31 | 988 | { |
182735ef | 989 | CPUState *cpu; |
880a7578 | 990 | |
e22a25c9 | 991 | if (kvm_enabled()) { |
2e0f2cfb | 992 | kvm_remove_all_breakpoints(gdbserver_state->c_cpu); |
e22a25c9 AL |
993 | return; |
994 | } | |
995 | ||
bdc44640 | 996 | CPU_FOREACH(cpu) { |
b3310ab3 | 997 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 998 | #ifndef CONFIG_USER_ONLY |
75a34036 | 999 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
a1d1bb31 | 1000 | #endif |
880a7578 | 1001 | } |
a1d1bb31 AL |
1002 | } |
1003 | ||
fab9d284 AJ |
1004 | static void gdb_set_cpu_pc(GDBState *s, target_ulong pc) |
1005 | { | |
2e0f2cfb | 1006 | CPUState *cpu = s->c_cpu; |
f45748f1 AF |
1007 | |
1008 | cpu_synchronize_state(cpu); | |
4a2b24ed | 1009 | cpu_set_pc(cpu, pc); |
fab9d284 AJ |
1010 | } |
1011 | ||
1a227336 LM |
1012 | static char *gdb_fmt_thread_id(const GDBState *s, CPUState *cpu, |
1013 | char *buf, size_t buf_size) | |
1014 | { | |
1015 | if (s->multiprocess) { | |
1016 | snprintf(buf, buf_size, "p%02x.%02x", | |
1017 | gdb_get_cpu_pid(s, cpu), cpu_gdb_index(cpu)); | |
1018 | } else { | |
1019 | snprintf(buf, buf_size, "%02x", cpu_gdb_index(cpu)); | |
1020 | } | |
1021 | ||
1022 | return buf; | |
1023 | } | |
1024 | ||
7d8c87da LM |
1025 | typedef enum GDBThreadIdKind { |
1026 | GDB_ONE_THREAD = 0, | |
1027 | GDB_ALL_THREADS, /* One process, all threads */ | |
1028 | GDB_ALL_PROCESSES, | |
1029 | GDB_READ_THREAD_ERR | |
1030 | } GDBThreadIdKind; | |
1031 | ||
1032 | static GDBThreadIdKind read_thread_id(const char *buf, const char **end_buf, | |
1033 | uint32_t *pid, uint32_t *tid) | |
1034 | { | |
1035 | unsigned long p, t; | |
1036 | int ret; | |
1037 | ||
1038 | if (*buf == 'p') { | |
1039 | buf++; | |
1040 | ret = qemu_strtoul(buf, &buf, 16, &p); | |
1041 | ||
1042 | if (ret) { | |
1043 | return GDB_READ_THREAD_ERR; | |
1044 | } | |
1045 | ||
1046 | /* Skip '.' */ | |
1047 | buf++; | |
1048 | } else { | |
1049 | p = 1; | |
1050 | } | |
1051 | ||
1052 | ret = qemu_strtoul(buf, &buf, 16, &t); | |
1053 | ||
1054 | if (ret) { | |
1055 | return GDB_READ_THREAD_ERR; | |
1056 | } | |
1057 | ||
1058 | *end_buf = buf; | |
1059 | ||
1060 | if (p == -1) { | |
1061 | return GDB_ALL_PROCESSES; | |
1062 | } | |
1063 | ||
1064 | if (pid) { | |
1065 | *pid = p; | |
1066 | } | |
1067 | ||
1068 | if (t == -1) { | |
1069 | return GDB_ALL_THREADS; | |
1070 | } | |
1071 | ||
1072 | if (tid) { | |
1073 | *tid = t; | |
1074 | } | |
1075 | ||
1076 | return GDB_ONE_THREAD; | |
1077 | } | |
1078 | ||
4dabe747 JK |
1079 | static int is_query_packet(const char *p, const char *query, char separator) |
1080 | { | |
1081 | unsigned int query_len = strlen(query); | |
1082 | ||
1083 | return strncmp(p, query, query_len) == 0 && | |
1084 | (p[query_len] == '\0' || p[query_len] == separator); | |
1085 | } | |
1086 | ||
544177ad CI |
1087 | /** |
1088 | * gdb_handle_vcont - Parses and handles a vCont packet. | |
1089 | * returns -ENOTSUP if a command is unsupported, -EINVAL or -ERANGE if there is | |
1090 | * a format error, 0 on success. | |
1091 | */ | |
1092 | static int gdb_handle_vcont(GDBState *s, const char *p) | |
1093 | { | |
1094 | int res, idx, signal = 0; | |
1095 | char cur_action; | |
1096 | char *newstates; | |
1097 | unsigned long tmp; | |
1098 | CPUState *cpu; | |
1099 | #ifdef CONFIG_USER_ONLY | |
1100 | int max_cpus = 1; /* global variable max_cpus exists only in system mode */ | |
1101 | ||
1102 | CPU_FOREACH(cpu) { | |
1103 | max_cpus = max_cpus <= cpu->cpu_index ? cpu->cpu_index + 1 : max_cpus; | |
1104 | } | |
1105 | #endif | |
1106 | /* uninitialised CPUs stay 0 */ | |
1107 | newstates = g_new0(char, max_cpus); | |
1108 | ||
1109 | /* mark valid CPUs with 1 */ | |
1110 | CPU_FOREACH(cpu) { | |
1111 | newstates[cpu->cpu_index] = 1; | |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * res keeps track of what error we are returning, with -ENOTSUP meaning | |
1116 | * that the command is unknown or unsupported, thus returning an empty | |
1117 | * packet, while -EINVAL and -ERANGE cause an E22 packet, due to invalid, | |
1118 | * or incorrect parameters passed. | |
1119 | */ | |
1120 | res = 0; | |
1121 | while (*p) { | |
1122 | if (*p++ != ';') { | |
1123 | res = -ENOTSUP; | |
1124 | goto out; | |
1125 | } | |
1126 | ||
1127 | cur_action = *p++; | |
1128 | if (cur_action == 'C' || cur_action == 'S') { | |
95a5befc | 1129 | cur_action = qemu_tolower(cur_action); |
544177ad CI |
1130 | res = qemu_strtoul(p + 1, &p, 16, &tmp); |
1131 | if (res) { | |
1132 | goto out; | |
1133 | } | |
1134 | signal = gdb_signal_to_target(tmp); | |
1135 | } else if (cur_action != 'c' && cur_action != 's') { | |
1136 | /* unknown/invalid/unsupported command */ | |
1137 | res = -ENOTSUP; | |
1138 | goto out; | |
1139 | } | |
1140 | /* thread specification. special values: (none), -1 = all; 0 = any */ | |
1141 | if ((p[0] == ':' && p[1] == '-' && p[2] == '1') || (p[0] != ':')) { | |
1142 | if (*p == ':') { | |
1143 | p += 3; | |
1144 | } | |
1145 | for (idx = 0; idx < max_cpus; idx++) { | |
1146 | if (newstates[idx] == 1) { | |
1147 | newstates[idx] = cur_action; | |
1148 | } | |
1149 | } | |
1150 | } else if (*p == ':') { | |
1151 | p++; | |
1152 | res = qemu_strtoul(p, &p, 16, &tmp); | |
1153 | if (res) { | |
1154 | goto out; | |
1155 | } | |
5a6a1ad1 | 1156 | |
544177ad | 1157 | /* 0 means any thread, so we pick the first valid CPU */ |
5a6a1ad1 | 1158 | cpu = tmp ? find_cpu(tmp) : first_cpu; |
544177ad | 1159 | |
544177ad | 1160 | /* invalid CPU/thread specified */ |
5a6a1ad1 | 1161 | if (!cpu) { |
544177ad CI |
1162 | res = -EINVAL; |
1163 | goto out; | |
1164 | } | |
5a6a1ad1 | 1165 | |
544177ad CI |
1166 | /* only use if no previous match occourred */ |
1167 | if (newstates[cpu->cpu_index] == 1) { | |
1168 | newstates[cpu->cpu_index] = cur_action; | |
1169 | } | |
1170 | } | |
1171 | } | |
1172 | s->signal = signal; | |
1173 | gdb_continue_partial(s, newstates); | |
1174 | ||
1175 | out: | |
1176 | g_free(newstates); | |
1177 | ||
1178 | return res; | |
1179 | } | |
1180 | ||
880a7578 | 1181 | static int gdb_handle_packet(GDBState *s, const char *line_buf) |
b4608c04 | 1182 | { |
2e0f2cfb | 1183 | CPUState *cpu; |
5b24c641 | 1184 | CPUClass *cc; |
b4608c04 | 1185 | const char *p; |
1e9fa730 | 1186 | uint32_t thread; |
7d8c87da | 1187 | uint32_t pid, tid; |
1e9fa730 | 1188 | int ch, reg_size, type, res; |
56aebc89 | 1189 | uint8_t mem_buf[MAX_PACKET_LENGTH]; |
9005774b | 1190 | char buf[sizeof(mem_buf) + 1 /* trailing NUL */]; |
1a227336 | 1191 | char thread_id[16]; |
56aebc89 | 1192 | uint8_t *registers; |
9d9754a3 | 1193 | target_ulong addr, len; |
7d8c87da | 1194 | GDBThreadIdKind thread_kind; |
3b46e624 | 1195 | |
5c9522b3 | 1196 | trace_gdbstub_io_command(line_buf); |
118e2268 | 1197 | |
858693c6 FB |
1198 | p = line_buf; |
1199 | ch = *p++; | |
1200 | switch(ch) { | |
1201 | case '?': | |
1fddef4b | 1202 | /* TODO: Make this return the correct value for user-mode. */ |
1a227336 LM |
1203 | snprintf(buf, sizeof(buf), "T%02xthread:%s;", GDB_SIGNAL_TRAP, |
1204 | gdb_fmt_thread_id(s, s->c_cpu, thread_id, sizeof(thread_id))); | |
858693c6 | 1205 | put_packet(s, buf); |
7d03f82f EI |
1206 | /* Remove all the breakpoints when this query is issued, |
1207 | * because gdb is doing and initial connect and the state | |
1208 | * should be cleaned up. | |
1209 | */ | |
880a7578 | 1210 | gdb_breakpoint_remove_all(); |
858693c6 FB |
1211 | break; |
1212 | case 'c': | |
1213 | if (*p != '\0') { | |
9d9754a3 | 1214 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 1215 | gdb_set_cpu_pc(s, addr); |
858693c6 | 1216 | } |
ca587a8e | 1217 | s->signal = 0; |
ba70a624 | 1218 | gdb_continue(s); |
5c9522b3 | 1219 | return RS_IDLE; |
1f487ee9 | 1220 | case 'C': |
ca587a8e AJ |
1221 | s->signal = gdb_signal_to_target (strtoul(p, (char **)&p, 16)); |
1222 | if (s->signal == -1) | |
1223 | s->signal = 0; | |
1f487ee9 EI |
1224 | gdb_continue(s); |
1225 | return RS_IDLE; | |
dd32aa10 JK |
1226 | case 'v': |
1227 | if (strncmp(p, "Cont", 4) == 0) { | |
dd32aa10 JK |
1228 | p += 4; |
1229 | if (*p == '?') { | |
1230 | put_packet(s, "vCont;c;C;s;S"); | |
1231 | break; | |
1232 | } | |
544177ad CI |
1233 | |
1234 | res = gdb_handle_vcont(s, p); | |
1235 | ||
dd32aa10 | 1236 | if (res) { |
544177ad CI |
1237 | if ((res == -EINVAL) || (res == -ERANGE)) { |
1238 | put_packet(s, "E22"); | |
1239 | break; | |
dd32aa10 | 1240 | } |
544177ad | 1241 | goto unknown_command; |
dd32aa10 JK |
1242 | } |
1243 | break; | |
1244 | } else { | |
1245 | goto unknown_command; | |
1246 | } | |
7d03f82f EI |
1247 | case 'k': |
1248 | /* Kill the target */ | |
7ae6c571 | 1249 | error_report("QEMU: Terminated via GDBstub"); |
7d03f82f EI |
1250 | exit(0); |
1251 | case 'D': | |
1252 | /* Detach packet */ | |
880a7578 | 1253 | gdb_breakpoint_remove_all(); |
7ea06da3 | 1254 | gdb_syscall_mode = GDB_SYS_DISABLED; |
7d03f82f EI |
1255 | gdb_continue(s); |
1256 | put_packet(s, "OK"); | |
1257 | break; | |
858693c6 FB |
1258 | case 's': |
1259 | if (*p != '\0') { | |
8fac5803 | 1260 | addr = strtoull(p, (char **)&p, 16); |
fab9d284 | 1261 | gdb_set_cpu_pc(s, addr); |
858693c6 | 1262 | } |
2e0f2cfb | 1263 | cpu_single_step(s->c_cpu, sstep_flags); |
ba70a624 | 1264 | gdb_continue(s); |
5c9522b3 | 1265 | return RS_IDLE; |
a2d1ebaf PB |
1266 | case 'F': |
1267 | { | |
1268 | target_ulong ret; | |
1269 | target_ulong err; | |
1270 | ||
1271 | ret = strtoull(p, (char **)&p, 16); | |
1272 | if (*p == ',') { | |
1273 | p++; | |
1274 | err = strtoull(p, (char **)&p, 16); | |
1275 | } else { | |
1276 | err = 0; | |
1277 | } | |
1278 | if (*p == ',') | |
1279 | p++; | |
1280 | type = *p; | |
cdb432b2 | 1281 | if (s->current_syscall_cb) { |
2e0f2cfb | 1282 | s->current_syscall_cb(s->c_cpu, ret, err); |
cdb432b2 MI |
1283 | s->current_syscall_cb = NULL; |
1284 | } | |
a2d1ebaf PB |
1285 | if (type == 'C') { |
1286 | put_packet(s, "T02"); | |
1287 | } else { | |
ba70a624 | 1288 | gdb_continue(s); |
a2d1ebaf PB |
1289 | } |
1290 | } | |
1291 | break; | |
858693c6 | 1292 | case 'g': |
2e0f2cfb | 1293 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 1294 | len = 0; |
35143f01 | 1295 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs; addr++) { |
2e0f2cfb | 1296 | reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr); |
56aebc89 PB |
1297 | len += reg_size; |
1298 | } | |
1299 | memtohex(buf, mem_buf, len); | |
858693c6 FB |
1300 | put_packet(s, buf); |
1301 | break; | |
1302 | case 'G': | |
2e0f2cfb | 1303 | cpu_synchronize_state(s->g_cpu); |
56aebc89 | 1304 | registers = mem_buf; |
858693c6 FB |
1305 | len = strlen(p) / 2; |
1306 | hextomem((uint8_t *)registers, p, len); | |
35143f01 | 1307 | for (addr = 0; addr < s->g_cpu->gdb_num_g_regs && len > 0; addr++) { |
2e0f2cfb | 1308 | reg_size = gdb_write_register(s->g_cpu, registers, addr); |
56aebc89 PB |
1309 | len -= reg_size; |
1310 | registers += reg_size; | |
1311 | } | |
858693c6 FB |
1312 | put_packet(s, "OK"); |
1313 | break; | |
1314 | case 'm': | |
9d9754a3 | 1315 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1316 | if (*p == ',') |
1317 | p++; | |
9d9754a3 | 1318 | len = strtoull(p, NULL, 16); |
5accecb3 KW |
1319 | |
1320 | /* memtohex() doubles the required space */ | |
1321 | if (len > MAX_PACKET_LENGTH / 2) { | |
1322 | put_packet (s, "E22"); | |
1323 | break; | |
1324 | } | |
1325 | ||
2e0f2cfb | 1326 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, false) != 0) { |
6f970bd9 FB |
1327 | put_packet (s, "E14"); |
1328 | } else { | |
1329 | memtohex(buf, mem_buf, len); | |
1330 | put_packet(s, buf); | |
1331 | } | |
858693c6 FB |
1332 | break; |
1333 | case 'M': | |
9d9754a3 | 1334 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1335 | if (*p == ',') |
1336 | p++; | |
9d9754a3 | 1337 | len = strtoull(p, (char **)&p, 16); |
b328f873 | 1338 | if (*p == ':') |
858693c6 | 1339 | p++; |
5accecb3 KW |
1340 | |
1341 | /* hextomem() reads 2*len bytes */ | |
1342 | if (len > strlen(p) / 2) { | |
1343 | put_packet (s, "E22"); | |
1344 | break; | |
1345 | } | |
858693c6 | 1346 | hextomem(mem_buf, p, len); |
2e0f2cfb | 1347 | if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, |
f3659eee | 1348 | true) != 0) { |
905f20b1 | 1349 | put_packet(s, "E14"); |
44520db1 | 1350 | } else { |
858693c6 | 1351 | put_packet(s, "OK"); |
44520db1 | 1352 | } |
858693c6 | 1353 | break; |
56aebc89 PB |
1354 | case 'p': |
1355 | /* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable. | |
1356 | This works, but can be very slow. Anything new enough to | |
1357 | understand XML also knows how to use this properly. */ | |
1358 | if (!gdb_has_xml) | |
1359 | goto unknown_command; | |
1360 | addr = strtoull(p, (char **)&p, 16); | |
2e0f2cfb | 1361 | reg_size = gdb_read_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1362 | if (reg_size) { |
1363 | memtohex(buf, mem_buf, reg_size); | |
1364 | put_packet(s, buf); | |
1365 | } else { | |
1366 | put_packet(s, "E14"); | |
1367 | } | |
1368 | break; | |
1369 | case 'P': | |
1370 | if (!gdb_has_xml) | |
1371 | goto unknown_command; | |
1372 | addr = strtoull(p, (char **)&p, 16); | |
1373 | if (*p == '=') | |
1374 | p++; | |
1375 | reg_size = strlen(p) / 2; | |
1376 | hextomem(mem_buf, p, reg_size); | |
2e0f2cfb | 1377 | gdb_write_register(s->g_cpu, mem_buf, addr); |
56aebc89 PB |
1378 | put_packet(s, "OK"); |
1379 | break; | |
858693c6 | 1380 | case 'Z': |
858693c6 FB |
1381 | case 'z': |
1382 | type = strtoul(p, (char **)&p, 16); | |
1383 | if (*p == ',') | |
1384 | p++; | |
9d9754a3 | 1385 | addr = strtoull(p, (char **)&p, 16); |
858693c6 FB |
1386 | if (*p == ',') |
1387 | p++; | |
9d9754a3 | 1388 | len = strtoull(p, (char **)&p, 16); |
a1d1bb31 | 1389 | if (ch == 'Z') |
880a7578 | 1390 | res = gdb_breakpoint_insert(addr, len, type); |
a1d1bb31 | 1391 | else |
880a7578 | 1392 | res = gdb_breakpoint_remove(addr, len, type); |
a1d1bb31 AL |
1393 | if (res >= 0) |
1394 | put_packet(s, "OK"); | |
1395 | else if (res == -ENOSYS) | |
0f459d16 | 1396 | put_packet(s, ""); |
a1d1bb31 AL |
1397 | else |
1398 | put_packet(s, "E22"); | |
858693c6 | 1399 | break; |
880a7578 AL |
1400 | case 'H': |
1401 | type = *p++; | |
7d8c87da LM |
1402 | |
1403 | thread_kind = read_thread_id(p, &p, &pid, &tid); | |
1404 | if (thread_kind == GDB_READ_THREAD_ERR) { | |
1405 | put_packet(s, "E22"); | |
1406 | break; | |
1407 | } | |
1408 | ||
1409 | if (thread_kind != GDB_ONE_THREAD) { | |
880a7578 AL |
1410 | put_packet(s, "OK"); |
1411 | break; | |
1412 | } | |
7d8c87da | 1413 | cpu = gdb_get_cpu(s, pid, tid); |
2e0f2cfb | 1414 | if (cpu == NULL) { |
880a7578 AL |
1415 | put_packet(s, "E22"); |
1416 | break; | |
1417 | } | |
1418 | switch (type) { | |
1419 | case 'c': | |
2e0f2cfb | 1420 | s->c_cpu = cpu; |
880a7578 AL |
1421 | put_packet(s, "OK"); |
1422 | break; | |
1423 | case 'g': | |
2e0f2cfb | 1424 | s->g_cpu = cpu; |
880a7578 AL |
1425 | put_packet(s, "OK"); |
1426 | break; | |
1427 | default: | |
1428 | put_packet(s, "E22"); | |
1429 | break; | |
1430 | } | |
1431 | break; | |
1432 | case 'T': | |
7d8c87da LM |
1433 | thread_kind = read_thread_id(p, &p, &pid, &tid); |
1434 | if (thread_kind == GDB_READ_THREAD_ERR) { | |
1435 | put_packet(s, "E22"); | |
1436 | break; | |
1437 | } | |
1438 | cpu = gdb_get_cpu(s, pid, tid); | |
1e9fa730 | 1439 | |
2e0f2cfb | 1440 | if (cpu != NULL) { |
1e9fa730 NF |
1441 | put_packet(s, "OK"); |
1442 | } else { | |
880a7578 | 1443 | put_packet(s, "E22"); |
1e9fa730 | 1444 | } |
880a7578 | 1445 | break; |
978efd6a | 1446 | case 'q': |
60897d36 EI |
1447 | case 'Q': |
1448 | /* parse any 'q' packets here */ | |
1449 | if (!strcmp(p,"qemu.sstepbits")) { | |
1450 | /* Query Breakpoint bit definitions */ | |
363a37d5 BS |
1451 | snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
1452 | SSTEP_ENABLE, | |
1453 | SSTEP_NOIRQ, | |
1454 | SSTEP_NOTIMER); | |
60897d36 EI |
1455 | put_packet(s, buf); |
1456 | break; | |
4dabe747 | 1457 | } else if (is_query_packet(p, "qemu.sstep", '=')) { |
60897d36 EI |
1458 | /* Display or change the sstep_flags */ |
1459 | p += 10; | |
1460 | if (*p != '=') { | |
1461 | /* Display current setting */ | |
363a37d5 | 1462 | snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
60897d36 EI |
1463 | put_packet(s, buf); |
1464 | break; | |
1465 | } | |
1466 | p++; | |
1467 | type = strtoul(p, (char **)&p, 16); | |
1468 | sstep_flags = type; | |
1469 | put_packet(s, "OK"); | |
1470 | break; | |
880a7578 AL |
1471 | } else if (strcmp(p,"C") == 0) { |
1472 | /* "Current thread" remains vague in the spec, so always return | |
1473 | * the first CPU (gdb returns the first thread). */ | |
1474 | put_packet(s, "QC1"); | |
1475 | break; | |
1476 | } else if (strcmp(p,"fThreadInfo") == 0) { | |
52f34623 | 1477 | s->query_cpu = first_cpu; |
880a7578 AL |
1478 | goto report_cpuinfo; |
1479 | } else if (strcmp(p,"sThreadInfo") == 0) { | |
1480 | report_cpuinfo: | |
1481 | if (s->query_cpu) { | |
d2a6c857 | 1482 | snprintf(buf, sizeof(buf), "m%x", cpu_gdb_index(s->query_cpu)); |
880a7578 | 1483 | put_packet(s, buf); |
bdc44640 | 1484 | s->query_cpu = CPU_NEXT(s->query_cpu); |
880a7578 AL |
1485 | } else |
1486 | put_packet(s, "l"); | |
1487 | break; | |
1488 | } else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) { | |
1489 | thread = strtoull(p+16, (char **)&p, 16); | |
2e0f2cfb AF |
1490 | cpu = find_cpu(thread); |
1491 | if (cpu != NULL) { | |
cb446eca | 1492 | cpu_synchronize_state(cpu); |
5accecb3 KW |
1493 | /* memtohex() doubles the required space */ |
1494 | len = snprintf((char *)mem_buf, sizeof(buf) / 2, | |
55e5c285 | 1495 | "CPU#%d [%s]", cpu->cpu_index, |
259186a7 | 1496 | cpu->halted ? "halted " : "running"); |
5c9522b3 | 1497 | trace_gdbstub_op_extra_info((char *)mem_buf); |
1e9fa730 NF |
1498 | memtohex(buf, mem_buf, len); |
1499 | put_packet(s, buf); | |
1500 | } | |
880a7578 | 1501 | break; |
60897d36 | 1502 | } |
0b8a988c | 1503 | #ifdef CONFIG_USER_ONLY |
070949f3 | 1504 | else if (strcmp(p, "Offsets") == 0) { |
0429a971 | 1505 | TaskState *ts = s->c_cpu->opaque; |
978efd6a | 1506 | |
363a37d5 BS |
1507 | snprintf(buf, sizeof(buf), |
1508 | "Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx | |
1509 | ";Bss=" TARGET_ABI_FMT_lx, | |
1510 | ts->info->code_offset, | |
1511 | ts->info->data_offset, | |
1512 | ts->info->data_offset); | |
978efd6a PB |
1513 | put_packet(s, buf); |
1514 | break; | |
1515 | } | |
0b8a988c | 1516 | #else /* !CONFIG_USER_ONLY */ |
8a34a0fb AL |
1517 | else if (strncmp(p, "Rcmd,", 5) == 0) { |
1518 | int len = strlen(p + 5); | |
1519 | ||
1520 | if ((len % 2) != 0) { | |
1521 | put_packet(s, "E01"); | |
1522 | break; | |
1523 | } | |
8a34a0fb | 1524 | len = len / 2; |
5accecb3 | 1525 | hextomem(mem_buf, p + 5, len); |
8a34a0fb | 1526 | mem_buf[len++] = 0; |
fa5efccb | 1527 | qemu_chr_be_write(s->mon_chr, mem_buf, len); |
8a34a0fb AL |
1528 | put_packet(s, "OK"); |
1529 | break; | |
1530 | } | |
0b8a988c | 1531 | #endif /* !CONFIG_USER_ONLY */ |
4dabe747 | 1532 | if (is_query_packet(p, "Supported", ':')) { |
5b3715bf | 1533 | snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
5b24c641 AF |
1534 | cc = CPU_GET_CLASS(first_cpu); |
1535 | if (cc->gdb_core_xml_file != NULL) { | |
1536 | pstrcat(buf, sizeof(buf), ";qXfer:features:read+"); | |
1537 | } | |
56aebc89 PB |
1538 | put_packet(s, buf); |
1539 | break; | |
1540 | } | |
56aebc89 PB |
1541 | if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
1542 | const char *xml; | |
1543 | target_ulong total_len; | |
1544 | ||
5b24c641 AF |
1545 | cc = CPU_GET_CLASS(first_cpu); |
1546 | if (cc->gdb_core_xml_file == NULL) { | |
1547 | goto unknown_command; | |
1548 | } | |
1549 | ||
5b50e790 | 1550 | gdb_has_xml = true; |
56aebc89 | 1551 | p += 19; |
5b24c641 | 1552 | xml = get_feature_xml(p, &p, cc); |
56aebc89 | 1553 | if (!xml) { |
5b3715bf | 1554 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1555 | put_packet(s, buf); |
1556 | break; | |
1557 | } | |
1558 | ||
1559 | if (*p == ':') | |
1560 | p++; | |
1561 | addr = strtoul(p, (char **)&p, 16); | |
1562 | if (*p == ',') | |
1563 | p++; | |
1564 | len = strtoul(p, (char **)&p, 16); | |
1565 | ||
1566 | total_len = strlen(xml); | |
1567 | if (addr > total_len) { | |
5b3715bf | 1568 | snprintf(buf, sizeof(buf), "E00"); |
56aebc89 PB |
1569 | put_packet(s, buf); |
1570 | break; | |
1571 | } | |
1572 | if (len > (MAX_PACKET_LENGTH - 5) / 2) | |
1573 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
1574 | if (len < total_len - addr) { | |
1575 | buf[0] = 'm'; | |
1576 | len = memtox(buf + 1, xml + addr, len); | |
1577 | } else { | |
1578 | buf[0] = 'l'; | |
1579 | len = memtox(buf + 1, xml + addr, total_len - addr); | |
1580 | } | |
5c9522b3 | 1581 | put_packet_binary(s, buf, len + 1, true); |
56aebc89 PB |
1582 | break; |
1583 | } | |
a3919386 JK |
1584 | if (is_query_packet(p, "Attached", ':')) { |
1585 | put_packet(s, GDB_ATTACHED); | |
1586 | break; | |
1587 | } | |
56aebc89 PB |
1588 | /* Unrecognised 'q' command. */ |
1589 | goto unknown_command; | |
1590 | ||
858693c6 | 1591 | default: |
56aebc89 | 1592 | unknown_command: |
858693c6 FB |
1593 | /* put empty packet */ |
1594 | buf[0] = '\0'; | |
1595 | put_packet(s, buf); | |
1596 | break; | |
1597 | } | |
1598 | return RS_IDLE; | |
1599 | } | |
1600 | ||
64f6b346 | 1601 | void gdb_set_stop_cpu(CPUState *cpu) |
880a7578 | 1602 | { |
2e0f2cfb AF |
1603 | gdbserver_state->c_cpu = cpu; |
1604 | gdbserver_state->g_cpu = cpu; | |
880a7578 AL |
1605 | } |
1606 | ||
1fddef4b | 1607 | #ifndef CONFIG_USER_ONLY |
1dfb4dd9 | 1608 | static void gdb_vm_state_change(void *opaque, int running, RunState state) |
858693c6 | 1609 | { |
880a7578 | 1610 | GDBState *s = gdbserver_state; |
2e0f2cfb | 1611 | CPUState *cpu = s->c_cpu; |
858693c6 | 1612 | char buf[256]; |
d6fc1b39 | 1613 | const char *type; |
858693c6 FB |
1614 | int ret; |
1615 | ||
cdb432b2 MI |
1616 | if (running || s->state == RS_INACTIVE) { |
1617 | return; | |
1618 | } | |
1619 | /* Is there a GDB syscall waiting to be sent? */ | |
1620 | if (s->current_syscall_cb) { | |
1621 | put_packet(s, s->syscall_buf); | |
a2d1ebaf | 1622 | return; |
e07bbac5 | 1623 | } |
1dfb4dd9 | 1624 | switch (state) { |
0461d5a6 | 1625 | case RUN_STATE_DEBUG: |
ff4700b0 AF |
1626 | if (cpu->watchpoint_hit) { |
1627 | switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) { | |
a1d1bb31 | 1628 | case BP_MEM_READ: |
d6fc1b39 AL |
1629 | type = "r"; |
1630 | break; | |
a1d1bb31 | 1631 | case BP_MEM_ACCESS: |
d6fc1b39 AL |
1632 | type = "a"; |
1633 | break; | |
1634 | default: | |
1635 | type = ""; | |
1636 | break; | |
1637 | } | |
5c9522b3 DG |
1638 | trace_gdbstub_hit_watchpoint(type, cpu_gdb_index(cpu), |
1639 | (target_ulong)cpu->watchpoint_hit->vaddr); | |
880a7578 AL |
1640 | snprintf(buf, sizeof(buf), |
1641 | "T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";", | |
d2a6c857 | 1642 | GDB_SIGNAL_TRAP, cpu_gdb_index(cpu), type, |
ff4700b0 AF |
1643 | (target_ulong)cpu->watchpoint_hit->vaddr); |
1644 | cpu->watchpoint_hit = NULL; | |
425189a8 | 1645 | goto send_packet; |
5c9522b3 DG |
1646 | } else { |
1647 | trace_gdbstub_hit_break(); | |
6658ffb8 | 1648 | } |
bbd77c18 | 1649 | tb_flush(cpu); |
ca587a8e | 1650 | ret = GDB_SIGNAL_TRAP; |
425189a8 | 1651 | break; |
0461d5a6 | 1652 | case RUN_STATE_PAUSED: |
5c9522b3 | 1653 | trace_gdbstub_hit_paused(); |
9781e040 | 1654 | ret = GDB_SIGNAL_INT; |
425189a8 | 1655 | break; |
0461d5a6 | 1656 | case RUN_STATE_SHUTDOWN: |
5c9522b3 | 1657 | trace_gdbstub_hit_shutdown(); |
425189a8 JK |
1658 | ret = GDB_SIGNAL_QUIT; |
1659 | break; | |
0461d5a6 | 1660 | case RUN_STATE_IO_ERROR: |
5c9522b3 | 1661 | trace_gdbstub_hit_io_error(); |
425189a8 JK |
1662 | ret = GDB_SIGNAL_IO; |
1663 | break; | |
0461d5a6 | 1664 | case RUN_STATE_WATCHDOG: |
5c9522b3 | 1665 | trace_gdbstub_hit_watchdog(); |
425189a8 JK |
1666 | ret = GDB_SIGNAL_ALRM; |
1667 | break; | |
0461d5a6 | 1668 | case RUN_STATE_INTERNAL_ERROR: |
5c9522b3 | 1669 | trace_gdbstub_hit_internal_error(); |
425189a8 JK |
1670 | ret = GDB_SIGNAL_ABRT; |
1671 | break; | |
0461d5a6 LC |
1672 | case RUN_STATE_SAVE_VM: |
1673 | case RUN_STATE_RESTORE_VM: | |
425189a8 | 1674 | return; |
0461d5a6 | 1675 | case RUN_STATE_FINISH_MIGRATE: |
425189a8 JK |
1676 | ret = GDB_SIGNAL_XCPU; |
1677 | break; | |
1678 | default: | |
5c9522b3 | 1679 | trace_gdbstub_hit_unknown(state); |
425189a8 JK |
1680 | ret = GDB_SIGNAL_UNKNOWN; |
1681 | break; | |
bbeb7b5c | 1682 | } |
226d007d | 1683 | gdb_set_stop_cpu(cpu); |
d2a6c857 | 1684 | snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, cpu_gdb_index(cpu)); |
425189a8 JK |
1685 | |
1686 | send_packet: | |
858693c6 | 1687 | put_packet(s, buf); |
425189a8 JK |
1688 | |
1689 | /* disable single step if it was enabled */ | |
3825b28f | 1690 | cpu_single_step(cpu, 0); |
858693c6 | 1691 | } |
1fddef4b | 1692 | #endif |
858693c6 | 1693 | |
a2d1ebaf PB |
1694 | /* Send a gdb syscall request. |
1695 | This accepts limited printf-style format specifiers, specifically: | |
a87295e8 PB |
1696 | %x - target_ulong argument printed in hex. |
1697 | %lx - 64-bit argument printed in hex. | |
1698 | %s - string pointer (target_ulong) and length (int) pair. */ | |
19239b39 | 1699 | void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va) |
a2d1ebaf | 1700 | { |
a2d1ebaf | 1701 | char *p; |
cdb432b2 | 1702 | char *p_end; |
a2d1ebaf | 1703 | target_ulong addr; |
a87295e8 | 1704 | uint64_t i64; |
a2d1ebaf PB |
1705 | GDBState *s; |
1706 | ||
880a7578 | 1707 | s = gdbserver_state; |
a2d1ebaf PB |
1708 | if (!s) |
1709 | return; | |
cdb432b2 | 1710 | s->current_syscall_cb = cb; |
a2d1ebaf | 1711 | #ifndef CONFIG_USER_ONLY |
0461d5a6 | 1712 | vm_stop(RUN_STATE_DEBUG); |
a2d1ebaf | 1713 | #endif |
cdb432b2 MI |
1714 | p = s->syscall_buf; |
1715 | p_end = &s->syscall_buf[sizeof(s->syscall_buf)]; | |
a2d1ebaf PB |
1716 | *(p++) = 'F'; |
1717 | while (*fmt) { | |
1718 | if (*fmt == '%') { | |
1719 | fmt++; | |
1720 | switch (*fmt++) { | |
1721 | case 'x': | |
1722 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1723 | p += snprintf(p, p_end - p, TARGET_FMT_lx, addr); |
a2d1ebaf | 1724 | break; |
a87295e8 PB |
1725 | case 'l': |
1726 | if (*(fmt++) != 'x') | |
1727 | goto bad_format; | |
1728 | i64 = va_arg(va, uint64_t); | |
cdb432b2 | 1729 | p += snprintf(p, p_end - p, "%" PRIx64, i64); |
a87295e8 | 1730 | break; |
a2d1ebaf PB |
1731 | case 's': |
1732 | addr = va_arg(va, target_ulong); | |
cdb432b2 | 1733 | p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x", |
363a37d5 | 1734 | addr, va_arg(va, int)); |
a2d1ebaf PB |
1735 | break; |
1736 | default: | |
a87295e8 | 1737 | bad_format: |
7ae6c571 ZY |
1738 | error_report("gdbstub: Bad syscall format string '%s'", |
1739 | fmt - 1); | |
a2d1ebaf PB |
1740 | break; |
1741 | } | |
1742 | } else { | |
1743 | *(p++) = *(fmt++); | |
1744 | } | |
1745 | } | |
8a93e02a | 1746 | *p = 0; |
a2d1ebaf | 1747 | #ifdef CONFIG_USER_ONLY |
cdb432b2 | 1748 | put_packet(s, s->syscall_buf); |
4f710866 PM |
1749 | /* Return control to gdb for it to process the syscall request. |
1750 | * Since the protocol requires that gdb hands control back to us | |
1751 | * using a "here are the results" F packet, we don't need to check | |
1752 | * gdb_handlesig's return value (which is the signal to deliver if | |
1753 | * execution was resumed via a continue packet). | |
1754 | */ | |
2e0f2cfb | 1755 | gdb_handlesig(s->c_cpu, 0); |
a2d1ebaf | 1756 | #else |
cdb432b2 MI |
1757 | /* In this case wait to send the syscall packet until notification that |
1758 | the CPU has stopped. This must be done because if the packet is sent | |
1759 | now the reply from the syscall request could be received while the CPU | |
1760 | is still in the running state, which can cause packets to be dropped | |
1761 | and state transition 'T' packets to be sent while the syscall is still | |
1762 | being processed. */ | |
9102deda | 1763 | qemu_cpu_kick(s->c_cpu); |
a2d1ebaf PB |
1764 | #endif |
1765 | } | |
1766 | ||
19239b39 PM |
1767 | void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
1768 | { | |
1769 | va_list va; | |
1770 | ||
1771 | va_start(va, fmt); | |
1772 | gdb_do_syscallv(cb, fmt, va); | |
1773 | va_end(va); | |
1774 | } | |
1775 | ||
6a00d601 | 1776 | static void gdb_read_byte(GDBState *s, int ch) |
858693c6 | 1777 | { |
60fe76f3 | 1778 | uint8_t reply; |
858693c6 | 1779 | |
1fddef4b | 1780 | #ifndef CONFIG_USER_ONLY |
4046d913 PB |
1781 | if (s->last_packet_len) { |
1782 | /* Waiting for a response to the last packet. If we see the start | |
1783 | of a new command then abandon the previous response. */ | |
1784 | if (ch == '-') { | |
5c9522b3 | 1785 | trace_gdbstub_err_got_nack(); |
ffe8ab83 | 1786 | put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
118e2268 | 1787 | } else if (ch == '+') { |
5c9522b3 | 1788 | trace_gdbstub_io_got_ack(); |
118e2268 | 1789 | } else { |
5c9522b3 | 1790 | trace_gdbstub_io_got_unexpected((uint8_t)ch); |
4046d913 | 1791 | } |
118e2268 | 1792 | |
4046d913 PB |
1793 | if (ch == '+' || ch == '$') |
1794 | s->last_packet_len = 0; | |
1795 | if (ch != '$') | |
1796 | return; | |
1797 | } | |
1354869c | 1798 | if (runstate_is_running()) { |
858693c6 FB |
1799 | /* when the CPU is running, we cannot do anything except stop |
1800 | it when receiving a char */ | |
0461d5a6 | 1801 | vm_stop(RUN_STATE_PAUSED); |
5fafdf24 | 1802 | } else |
1fddef4b | 1803 | #endif |
41625033 | 1804 | { |
858693c6 FB |
1805 | switch(s->state) { |
1806 | case RS_IDLE: | |
1807 | if (ch == '$') { | |
4bf43122 | 1808 | /* start of command packet */ |
858693c6 | 1809 | s->line_buf_index = 0; |
4bf43122 | 1810 | s->line_sum = 0; |
858693c6 | 1811 | s->state = RS_GETLINE; |
4bf43122 | 1812 | } else { |
5c9522b3 | 1813 | trace_gdbstub_err_garbage((uint8_t)ch); |
c33a346e | 1814 | } |
b4608c04 | 1815 | break; |
858693c6 | 1816 | case RS_GETLINE: |
4bf43122 DG |
1817 | if (ch == '}') { |
1818 | /* start escape sequence */ | |
1819 | s->state = RS_GETLINE_ESC; | |
1820 | s->line_sum += ch; | |
1821 | } else if (ch == '*') { | |
1822 | /* start run length encoding sequence */ | |
1823 | s->state = RS_GETLINE_RLE; | |
1824 | s->line_sum += ch; | |
1825 | } else if (ch == '#') { | |
1826 | /* end of command, start of checksum*/ | |
1827 | s->state = RS_CHKSUM1; | |
1828 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { | |
5c9522b3 | 1829 | trace_gdbstub_err_overrun(); |
4bf43122 DG |
1830 | s->state = RS_IDLE; |
1831 | } else { | |
1832 | /* unescaped command character */ | |
1833 | s->line_buf[s->line_buf_index++] = ch; | |
1834 | s->line_sum += ch; | |
1835 | } | |
1836 | break; | |
1837 | case RS_GETLINE_ESC: | |
858693c6 | 1838 | if (ch == '#') { |
4bf43122 DG |
1839 | /* unexpected end of command in escape sequence */ |
1840 | s->state = RS_CHKSUM1; | |
858693c6 | 1841 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
4bf43122 | 1842 | /* command buffer overrun */ |
5c9522b3 | 1843 | trace_gdbstub_err_overrun(); |
858693c6 | 1844 | s->state = RS_IDLE; |
4c3a88a2 | 1845 | } else { |
4bf43122 DG |
1846 | /* parse escaped character and leave escape state */ |
1847 | s->line_buf[s->line_buf_index++] = ch ^ 0x20; | |
1848 | s->line_sum += ch; | |
1849 | s->state = RS_GETLINE; | |
1850 | } | |
1851 | break; | |
1852 | case RS_GETLINE_RLE: | |
1853 | if (ch < ' ') { | |
1854 | /* invalid RLE count encoding */ | |
5c9522b3 | 1855 | trace_gdbstub_err_invalid_repeat((uint8_t)ch); |
4bf43122 DG |
1856 | s->state = RS_GETLINE; |
1857 | } else { | |
1858 | /* decode repeat length */ | |
1859 | int repeat = (unsigned char)ch - ' ' + 3; | |
1860 | if (s->line_buf_index + repeat >= sizeof(s->line_buf) - 1) { | |
1861 | /* that many repeats would overrun the command buffer */ | |
5c9522b3 | 1862 | trace_gdbstub_err_overrun(); |
4bf43122 DG |
1863 | s->state = RS_IDLE; |
1864 | } else if (s->line_buf_index < 1) { | |
1865 | /* got a repeat but we have nothing to repeat */ | |
5c9522b3 | 1866 | trace_gdbstub_err_invalid_rle(); |
4bf43122 DG |
1867 | s->state = RS_GETLINE; |
1868 | } else { | |
1869 | /* repeat the last character */ | |
1870 | memset(s->line_buf + s->line_buf_index, | |
1871 | s->line_buf[s->line_buf_index - 1], repeat); | |
1872 | s->line_buf_index += repeat; | |
1873 | s->line_sum += ch; | |
1874 | s->state = RS_GETLINE; | |
1875 | } | |
4c3a88a2 FB |
1876 | } |
1877 | break; | |
858693c6 | 1878 | case RS_CHKSUM1: |
4bf43122 DG |
1879 | /* get high hex digit of checksum */ |
1880 | if (!isxdigit(ch)) { | |
5c9522b3 | 1881 | trace_gdbstub_err_checksum_invalid((uint8_t)ch); |
4bf43122 DG |
1882 | s->state = RS_GETLINE; |
1883 | break; | |
1884 | } | |
858693c6 FB |
1885 | s->line_buf[s->line_buf_index] = '\0'; |
1886 | s->line_csum = fromhex(ch) << 4; | |
1887 | s->state = RS_CHKSUM2; | |
1888 | break; | |
1889 | case RS_CHKSUM2: | |
4bf43122 DG |
1890 | /* get low hex digit of checksum */ |
1891 | if (!isxdigit(ch)) { | |
5c9522b3 | 1892 | trace_gdbstub_err_checksum_invalid((uint8_t)ch); |
4bf43122 DG |
1893 | s->state = RS_GETLINE; |
1894 | break; | |
858693c6 | 1895 | } |
4bf43122 DG |
1896 | s->line_csum |= fromhex(ch); |
1897 | ||
1898 | if (s->line_csum != (s->line_sum & 0xff)) { | |
5c9522b3 | 1899 | trace_gdbstub_err_checksum_incorrect(s->line_sum, s->line_csum); |
4bf43122 | 1900 | /* send NAK reply */ |
60fe76f3 TS |
1901 | reply = '-'; |
1902 | put_buffer(s, &reply, 1); | |
858693c6 | 1903 | s->state = RS_IDLE; |
4c3a88a2 | 1904 | } else { |
4bf43122 | 1905 | /* send ACK reply */ |
60fe76f3 TS |
1906 | reply = '+'; |
1907 | put_buffer(s, &reply, 1); | |
880a7578 | 1908 | s->state = gdb_handle_packet(s, s->line_buf); |
4c3a88a2 FB |
1909 | } |
1910 | break; | |
a2d1ebaf PB |
1911 | default: |
1912 | abort(); | |
858693c6 FB |
1913 | } |
1914 | } | |
1915 | } | |
1916 | ||
0e1c9c54 | 1917 | /* Tell the remote gdb that the process has exited. */ |
9349b4f9 | 1918 | void gdb_exit(CPUArchState *env, int code) |
0e1c9c54 PB |
1919 | { |
1920 | GDBState *s; | |
1921 | char buf[4]; | |
1922 | ||
1923 | s = gdbserver_state; | |
1924 | if (!s) { | |
1925 | return; | |
1926 | } | |
1927 | #ifdef CONFIG_USER_ONLY | |
1928 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1929 | return; | |
1930 | } | |
1931 | #endif | |
1932 | ||
5c9522b3 DG |
1933 | trace_gdbstub_op_exiting((uint8_t)code); |
1934 | ||
0e1c9c54 PB |
1935 | snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code); |
1936 | put_packet(s, buf); | |
e2af15b2 FC |
1937 | |
1938 | #ifndef CONFIG_USER_ONLY | |
1ce2610c | 1939 | qemu_chr_fe_deinit(&s->chr, true); |
e2af15b2 | 1940 | #endif |
0e1c9c54 PB |
1941 | } |
1942 | ||
8f468636 LM |
1943 | /* |
1944 | * Create the process that will contain all the "orphan" CPUs (that are not | |
1945 | * part of a CPU cluster). Note that if this process contains no CPUs, it won't | |
1946 | * be attachable and thus will be invisible to the user. | |
1947 | */ | |
1948 | static void create_default_process(GDBState *s) | |
1949 | { | |
1950 | GDBProcess *process; | |
1951 | int max_pid = 0; | |
1952 | ||
1953 | if (s->process_num) { | |
1954 | max_pid = s->processes[s->process_num - 1].pid; | |
1955 | } | |
1956 | ||
1957 | s->processes = g_renew(GDBProcess, s->processes, ++s->process_num); | |
1958 | process = &s->processes[s->process_num - 1]; | |
1959 | ||
1960 | /* We need an available PID slot for this process */ | |
1961 | assert(max_pid < UINT32_MAX); | |
1962 | ||
1963 | process->pid = max_pid + 1; | |
1964 | process->attached = false; | |
1965 | } | |
1966 | ||
1fddef4b FB |
1967 | #ifdef CONFIG_USER_ONLY |
1968 | int | |
db6b81d4 | 1969 | gdb_handlesig(CPUState *cpu, int sig) |
1fddef4b | 1970 | { |
5ca666c7 AF |
1971 | GDBState *s; |
1972 | char buf[256]; | |
1973 | int n; | |
1fddef4b | 1974 | |
5ca666c7 AF |
1975 | s = gdbserver_state; |
1976 | if (gdbserver_fd < 0 || s->fd < 0) { | |
1977 | return sig; | |
1978 | } | |
1fddef4b | 1979 | |
5ca666c7 | 1980 | /* disable single step if it was enabled */ |
3825b28f | 1981 | cpu_single_step(cpu, 0); |
bbd77c18 | 1982 | tb_flush(cpu); |
1fddef4b | 1983 | |
5ca666c7 AF |
1984 | if (sig != 0) { |
1985 | snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); | |
1986 | put_packet(s, buf); | |
1987 | } | |
1988 | /* put_packet() might have detected that the peer terminated the | |
1989 | connection. */ | |
1990 | if (s->fd < 0) { | |
1991 | return sig; | |
1992 | } | |
1fddef4b | 1993 | |
5ca666c7 AF |
1994 | sig = 0; |
1995 | s->state = RS_IDLE; | |
1996 | s->running_state = 0; | |
1997 | while (s->running_state == 0) { | |
1998 | n = read(s->fd, buf, 256); | |
1999 | if (n > 0) { | |
2000 | int i; | |
2001 | ||
2002 | for (i = 0; i < n; i++) { | |
2003 | gdb_read_byte(s, buf[i]); | |
2004 | } | |
5819e3e0 | 2005 | } else { |
5ca666c7 AF |
2006 | /* XXX: Connection closed. Should probably wait for another |
2007 | connection before continuing. */ | |
5819e3e0 PW |
2008 | if (n == 0) { |
2009 | close(s->fd); | |
2010 | } | |
2011 | s->fd = -1; | |
5ca666c7 | 2012 | return sig; |
1fddef4b | 2013 | } |
5ca666c7 AF |
2014 | } |
2015 | sig = s->signal; | |
2016 | s->signal = 0; | |
2017 | return sig; | |
1fddef4b | 2018 | } |
e9009676 | 2019 | |
ca587a8e | 2020 | /* Tell the remote gdb that the process has exited due to SIG. */ |
9349b4f9 | 2021 | void gdb_signalled(CPUArchState *env, int sig) |
ca587a8e | 2022 | { |
5ca666c7 AF |
2023 | GDBState *s; |
2024 | char buf[4]; | |
ca587a8e | 2025 | |
5ca666c7 AF |
2026 | s = gdbserver_state; |
2027 | if (gdbserver_fd < 0 || s->fd < 0) { | |
2028 | return; | |
2029 | } | |
ca587a8e | 2030 | |
5ca666c7 AF |
2031 | snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig)); |
2032 | put_packet(s, buf); | |
ca587a8e | 2033 | } |
1fddef4b | 2034 | |
2f652224 | 2035 | static bool gdb_accept(void) |
858693c6 FB |
2036 | { |
2037 | GDBState *s; | |
2038 | struct sockaddr_in sockaddr; | |
2039 | socklen_t len; | |
bf1c852a | 2040 | int fd; |
858693c6 FB |
2041 | |
2042 | for(;;) { | |
2043 | len = sizeof(sockaddr); | |
2044 | fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len); | |
2045 | if (fd < 0 && errno != EINTR) { | |
2046 | perror("accept"); | |
2f652224 | 2047 | return false; |
858693c6 | 2048 | } else if (fd >= 0) { |
f5bdd781 | 2049 | qemu_set_cloexec(fd); |
b4608c04 FB |
2050 | break; |
2051 | } | |
2052 | } | |
858693c6 FB |
2053 | |
2054 | /* set short latency */ | |
2f652224 PM |
2055 | if (socket_set_nodelay(fd)) { |
2056 | perror("setsockopt"); | |
ead75d84 | 2057 | close(fd); |
2f652224 PM |
2058 | return false; |
2059 | } | |
3b46e624 | 2060 | |
7267c094 | 2061 | s = g_malloc0(sizeof(GDBState)); |
2e0f2cfb AF |
2062 | s->c_cpu = first_cpu; |
2063 | s->g_cpu = first_cpu; | |
8f468636 | 2064 | create_default_process(s); |
858693c6 | 2065 | s->fd = fd; |
5b50e790 | 2066 | gdb_has_xml = false; |
858693c6 | 2067 | |
880a7578 | 2068 | gdbserver_state = s; |
2f652224 | 2069 | return true; |
858693c6 FB |
2070 | } |
2071 | ||
2072 | static int gdbserver_open(int port) | |
2073 | { | |
2074 | struct sockaddr_in sockaddr; | |
6669ca13 | 2075 | int fd, ret; |
858693c6 FB |
2076 | |
2077 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
2078 | if (fd < 0) { | |
2079 | perror("socket"); | |
2080 | return -1; | |
2081 | } | |
f5bdd781 | 2082 | qemu_set_cloexec(fd); |
858693c6 | 2083 | |
6669ca13 | 2084 | socket_set_fast_reuse(fd); |
858693c6 FB |
2085 | |
2086 | sockaddr.sin_family = AF_INET; | |
2087 | sockaddr.sin_port = htons(port); | |
2088 | sockaddr.sin_addr.s_addr = 0; | |
2089 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
2090 | if (ret < 0) { | |
2091 | perror("bind"); | |
bb16172c | 2092 | close(fd); |
858693c6 FB |
2093 | return -1; |
2094 | } | |
96165b9e | 2095 | ret = listen(fd, 1); |
858693c6 FB |
2096 | if (ret < 0) { |
2097 | perror("listen"); | |
bb16172c | 2098 | close(fd); |
858693c6 FB |
2099 | return -1; |
2100 | } | |
858693c6 FB |
2101 | return fd; |
2102 | } | |
2103 | ||
2104 | int gdbserver_start(int port) | |
2105 | { | |
2106 | gdbserver_fd = gdbserver_open(port); | |
2107 | if (gdbserver_fd < 0) | |
2108 | return -1; | |
2109 | /* accept connections */ | |
2f652224 PM |
2110 | if (!gdb_accept()) { |
2111 | close(gdbserver_fd); | |
2112 | gdbserver_fd = -1; | |
2113 | return -1; | |
2114 | } | |
4046d913 PB |
2115 | return 0; |
2116 | } | |
2b1319c8 AJ |
2117 | |
2118 | /* Disable gdb stub for child processes. */ | |
f7ec7f7b | 2119 | void gdbserver_fork(CPUState *cpu) |
2b1319c8 AJ |
2120 | { |
2121 | GDBState *s = gdbserver_state; | |
75a34036 AF |
2122 | |
2123 | if (gdbserver_fd < 0 || s->fd < 0) { | |
2124 | return; | |
2125 | } | |
2b1319c8 AJ |
2126 | close(s->fd); |
2127 | s->fd = -1; | |
b3310ab3 | 2128 | cpu_breakpoint_remove_all(cpu, BP_GDB); |
75a34036 | 2129 | cpu_watchpoint_remove_all(cpu, BP_GDB); |
2b1319c8 | 2130 | } |
1fddef4b | 2131 | #else |
aa1f17c1 | 2132 | static int gdb_chr_can_receive(void *opaque) |
4046d913 | 2133 | { |
56aebc89 PB |
2134 | /* We can handle an arbitrarily large amount of data. |
2135 | Pick the maximum packet size, which is as good as anything. */ | |
2136 | return MAX_PACKET_LENGTH; | |
4046d913 PB |
2137 | } |
2138 | ||
aa1f17c1 | 2139 | static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
4046d913 | 2140 | { |
4046d913 PB |
2141 | int i; |
2142 | ||
2143 | for (i = 0; i < size; i++) { | |
880a7578 | 2144 | gdb_read_byte(gdbserver_state, buf[i]); |
4046d913 PB |
2145 | } |
2146 | } | |
2147 | ||
2148 | static void gdb_chr_event(void *opaque, int event) | |
2149 | { | |
2150 | switch (event) { | |
b6b8df56 | 2151 | case CHR_EVENT_OPENED: |
0461d5a6 | 2152 | vm_stop(RUN_STATE_PAUSED); |
5b50e790 | 2153 | gdb_has_xml = false; |
4046d913 PB |
2154 | break; |
2155 | default: | |
2156 | break; | |
2157 | } | |
2158 | } | |
2159 | ||
8a34a0fb AL |
2160 | static void gdb_monitor_output(GDBState *s, const char *msg, int len) |
2161 | { | |
2162 | char buf[MAX_PACKET_LENGTH]; | |
2163 | ||
2164 | buf[0] = 'O'; | |
2165 | if (len > (MAX_PACKET_LENGTH/2) - 1) | |
2166 | len = (MAX_PACKET_LENGTH/2) - 1; | |
2167 | memtohex(buf + 1, (uint8_t *)msg, len); | |
2168 | put_packet(s, buf); | |
2169 | } | |
2170 | ||
0ec7b3e7 | 2171 | static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len) |
8a34a0fb AL |
2172 | { |
2173 | const char *p = (const char *)buf; | |
2174 | int max_sz; | |
2175 | ||
2176 | max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2; | |
2177 | for (;;) { | |
2178 | if (len <= max_sz) { | |
2179 | gdb_monitor_output(gdbserver_state, p, len); | |
2180 | break; | |
2181 | } | |
2182 | gdb_monitor_output(gdbserver_state, p, max_sz); | |
2183 | p += max_sz; | |
2184 | len -= max_sz; | |
2185 | } | |
2186 | return len; | |
2187 | } | |
2188 | ||
59030a8c AL |
2189 | #ifndef _WIN32 |
2190 | static void gdb_sigterm_handler(int signal) | |
2191 | { | |
1354869c | 2192 | if (runstate_is_running()) { |
0461d5a6 | 2193 | vm_stop(RUN_STATE_PAUSED); |
e07bbac5 | 2194 | } |
59030a8c AL |
2195 | } |
2196 | #endif | |
2197 | ||
777357d7 MAL |
2198 | static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend, |
2199 | bool *be_opened, Error **errp) | |
2200 | { | |
2201 | *be_opened = false; | |
2202 | } | |
2203 | ||
2204 | static void char_gdb_class_init(ObjectClass *oc, void *data) | |
2205 | { | |
2206 | ChardevClass *cc = CHARDEV_CLASS(oc); | |
2207 | ||
2208 | cc->internal = true; | |
2209 | cc->open = gdb_monitor_open; | |
2210 | cc->chr_write = gdb_monitor_write; | |
2211 | } | |
2212 | ||
2213 | #define TYPE_CHARDEV_GDB "chardev-gdb" | |
2214 | ||
2215 | static const TypeInfo char_gdb_type_info = { | |
2216 | .name = TYPE_CHARDEV_GDB, | |
2217 | .parent = TYPE_CHARDEV, | |
2218 | .class_init = char_gdb_class_init, | |
2219 | }; | |
2220 | ||
8f468636 LM |
2221 | static int find_cpu_clusters(Object *child, void *opaque) |
2222 | { | |
2223 | if (object_dynamic_cast(child, TYPE_CPU_CLUSTER)) { | |
2224 | GDBState *s = (GDBState *) opaque; | |
2225 | CPUClusterState *cluster = CPU_CLUSTER(child); | |
2226 | GDBProcess *process; | |
2227 | ||
2228 | s->processes = g_renew(GDBProcess, s->processes, ++s->process_num); | |
2229 | ||
2230 | process = &s->processes[s->process_num - 1]; | |
2231 | ||
2232 | /* | |
2233 | * GDB process IDs -1 and 0 are reserved. To avoid subtle errors at | |
2234 | * runtime, we enforce here that the machine does not use a cluster ID | |
2235 | * that would lead to PID 0. | |
2236 | */ | |
2237 | assert(cluster->cluster_id != UINT32_MAX); | |
2238 | process->pid = cluster->cluster_id + 1; | |
2239 | process->attached = false; | |
2240 | ||
2241 | return 0; | |
2242 | } | |
2243 | ||
2244 | return object_child_foreach(child, find_cpu_clusters, opaque); | |
2245 | } | |
2246 | ||
2247 | static int pid_order(const void *a, const void *b) | |
2248 | { | |
2249 | GDBProcess *pa = (GDBProcess *) a; | |
2250 | GDBProcess *pb = (GDBProcess *) b; | |
2251 | ||
2252 | if (pa->pid < pb->pid) { | |
2253 | return -1; | |
2254 | } else if (pa->pid > pb->pid) { | |
2255 | return 1; | |
2256 | } else { | |
2257 | return 0; | |
2258 | } | |
2259 | } | |
2260 | ||
2261 | static void create_processes(GDBState *s) | |
2262 | { | |
2263 | object_child_foreach(object_get_root(), find_cpu_clusters, s); | |
2264 | ||
2265 | if (s->processes) { | |
2266 | /* Sort by PID */ | |
2267 | qsort(s->processes, s->process_num, sizeof(s->processes[0]), pid_order); | |
2268 | } | |
2269 | ||
2270 | create_default_process(s); | |
2271 | } | |
2272 | ||
2273 | static void cleanup_processes(GDBState *s) | |
2274 | { | |
2275 | g_free(s->processes); | |
2276 | s->process_num = 0; | |
2277 | s->processes = NULL; | |
2278 | } | |
2279 | ||
59030a8c | 2280 | int gdbserver_start(const char *device) |
4046d913 | 2281 | { |
5c9522b3 DG |
2282 | trace_gdbstub_op_start(device); |
2283 | ||
4046d913 | 2284 | GDBState *s; |
59030a8c | 2285 | char gdbstub_device_name[128]; |
0ec7b3e7 MAL |
2286 | Chardev *chr = NULL; |
2287 | Chardev *mon_chr; | |
cfc3475a | 2288 | |
508b4ecc ZY |
2289 | if (!first_cpu) { |
2290 | error_report("gdbstub: meaningless to attach gdb to a " | |
2291 | "machine without any CPU."); | |
2292 | return -1; | |
2293 | } | |
2294 | ||
59030a8c AL |
2295 | if (!device) |
2296 | return -1; | |
2297 | if (strcmp(device, "none") != 0) { | |
2298 | if (strstart(device, "tcp:", NULL)) { | |
2299 | /* enforce required TCP attributes */ | |
2300 | snprintf(gdbstub_device_name, sizeof(gdbstub_device_name), | |
2301 | "%s,nowait,nodelay,server", device); | |
2302 | device = gdbstub_device_name; | |
36556b20 | 2303 | } |
59030a8c AL |
2304 | #ifndef _WIN32 |
2305 | else if (strcmp(device, "stdio") == 0) { | |
2306 | struct sigaction act; | |
4046d913 | 2307 | |
59030a8c AL |
2308 | memset(&act, 0, sizeof(act)); |
2309 | act.sa_handler = gdb_sigterm_handler; | |
2310 | sigaction(SIGINT, &act, NULL); | |
2311 | } | |
2312 | #endif | |
95e30b2a MAL |
2313 | /* |
2314 | * FIXME: it's a bit weird to allow using a mux chardev here | |
2315 | * and implicitly setup a monitor. We may want to break this. | |
2316 | */ | |
2317 | chr = qemu_chr_new_noreplay("gdb", device, true); | |
36556b20 AL |
2318 | if (!chr) |
2319 | return -1; | |
cfc3475a PB |
2320 | } |
2321 | ||
36556b20 AL |
2322 | s = gdbserver_state; |
2323 | if (!s) { | |
7267c094 | 2324 | s = g_malloc0(sizeof(GDBState)); |
36556b20 | 2325 | gdbserver_state = s; |
4046d913 | 2326 | |
36556b20 AL |
2327 | qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL); |
2328 | ||
2329 | /* Initialize a monitor terminal for gdb */ | |
777357d7 MAL |
2330 | mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB, |
2331 | NULL, &error_abort); | |
36556b20 AL |
2332 | monitor_init(mon_chr, 0); |
2333 | } else { | |
1ce2610c | 2334 | qemu_chr_fe_deinit(&s->chr, true); |
36556b20 | 2335 | mon_chr = s->mon_chr; |
8f468636 | 2336 | cleanup_processes(s); |
36556b20 | 2337 | memset(s, 0, sizeof(GDBState)); |
32a6ebec | 2338 | s->mon_chr = mon_chr; |
36556b20 | 2339 | } |
2e0f2cfb AF |
2340 | s->c_cpu = first_cpu; |
2341 | s->g_cpu = first_cpu; | |
8f468636 LM |
2342 | |
2343 | create_processes(s); | |
2344 | ||
32a6ebec MAL |
2345 | if (chr) { |
2346 | qemu_chr_fe_init(&s->chr, chr, &error_abort); | |
5345fdb4 | 2347 | qemu_chr_fe_set_handlers(&s->chr, gdb_chr_can_receive, gdb_chr_receive, |
81517ba3 | 2348 | gdb_chr_event, NULL, NULL, NULL, true); |
32a6ebec | 2349 | } |
36556b20 AL |
2350 | s->state = chr ? RS_IDLE : RS_INACTIVE; |
2351 | s->mon_chr = mon_chr; | |
cdb432b2 | 2352 | s->current_syscall_cb = NULL; |
8a34a0fb | 2353 | |
b4608c04 FB |
2354 | return 0; |
2355 | } | |
777357d7 | 2356 | |
1bb982b8 KF |
2357 | void gdbserver_cleanup(void) |
2358 | { | |
2359 | if (gdbserver_state) { | |
2360 | put_packet(gdbserver_state, "W00"); | |
2361 | } | |
2362 | } | |
2363 | ||
777357d7 MAL |
2364 | static void register_types(void) |
2365 | { | |
2366 | type_register_static(&char_gdb_type_info); | |
2367 | } | |
2368 | ||
2369 | type_init(register_types); | |
4046d913 | 2370 | #endif |