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Commit | Line | Data |
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b4608c04 FB |
1 | /* |
2 | * gdb server stub | |
5fafdf24 | 3 | * |
42a09596 AB |
4 | * This implements a subset of the remote protocol as described in: |
5 | * | |
6 | * https://sourceware.org/gdb/onlinedocs/gdb/Remote-Protocol.html | |
7 | * | |
3475187d | 8 | * Copyright (c) 2003-2005 Fabrice Bellard |
b4608c04 FB |
9 | * |
10 | * This library is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU Lesser General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This library is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public | |
8167ee88 | 21 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
42a09596 AB |
22 | * |
23 | * SPDX-License-Identifier: LGPL-2.0+ | |
b4608c04 | 24 | */ |
856dfd8a | 25 | |
d38ea87a | 26 | #include "qemu/osdep.h" |
856dfd8a | 27 | #include "qemu/ctype.h" |
f348b6d1 | 28 | #include "qemu/cutils.h" |
0b8fa32f | 29 | #include "qemu/module.h" |
cc37d98b | 30 | #include "qemu/error-report.h" |
842b42df | 31 | #include "trace.h" |
85b4fa0c | 32 | #include "exec/gdbstub.h" |
c566080c | 33 | #include "gdbstub/syscalls.h" |
f348b6d1 | 34 | #ifdef CONFIG_USER_ONLY |
d96bf49b | 35 | #include "gdbstub/user.h" |
1fddef4b | 36 | #else |
8f468636 | 37 | #include "hw/cpu/cluster.h" |
5cc8767d | 38 | #include "hw/boards.h" |
1fddef4b | 39 | #endif |
67b915a5 | 40 | |
b3946626 | 41 | #include "sysemu/hw_accel.h" |
54d31236 | 42 | #include "sysemu/runstate.h" |
5b5968c4 | 43 | #include "exec/replay-core.h" |
548c9609 | 44 | #include "exec/hwaddr.h" |
ca587a8e | 45 | |
ae7467b1 AB |
46 | #include "internals.h" |
47 | ||
56aebc89 PB |
48 | typedef struct GDBRegisterState { |
49 | int base_reg; | |
50 | int num_regs; | |
a010bdbe AB |
51 | gdb_get_reg_cb get_reg; |
52 | gdb_set_reg_cb set_reg; | |
56aebc89 PB |
53 | const char *xml; |
54 | struct GDBRegisterState *next; | |
55 | } GDBRegisterState; | |
56 | ||
b6fa2ec2 | 57 | GDBState gdbserver_state; |
8d98c445 | 58 | |
36e067b2 | 59 | void gdb_init_gdbserver_state(void) |
8d98c445 AB |
60 | { |
61 | g_assert(!gdbserver_state.init); | |
62 | memset(&gdbserver_state, 0, sizeof(GDBState)); | |
63 | gdbserver_state.init = true; | |
308f9e88 | 64 | gdbserver_state.str_buf = g_string_new(NULL); |
4a25f1b9 | 65 | gdbserver_state.mem_buf = g_byte_array_sized_new(MAX_PACKET_LENGTH); |
d116e813 | 66 | gdbserver_state.last_packet = g_byte_array_sized_new(MAX_PACKET_LENGTH + 4); |
ecd39d62 ML |
67 | |
68 | /* | |
3b7a9388 AB |
69 | * What single-step modes are supported is accelerator dependent. |
70 | * By default try to use no IRQs and no timers while single | |
71 | * stepping so as to make single stepping like a typical ICE HW step. | |
ecd39d62 | 72 | */ |
3b7a9388 | 73 | gdbserver_state.supported_sstep_flags = accel_supported_gdbstub_sstep_flags(); |
12bc5b4c ML |
74 | gdbserver_state.sstep_flags = SSTEP_ENABLE | SSTEP_NOIRQ | SSTEP_NOTIMER; |
75 | gdbserver_state.sstep_flags &= gdbserver_state.supported_sstep_flags; | |
8d98c445 AB |
76 | } |
77 | ||
9005774b | 78 | /* writes 2*len+1 bytes in buf */ |
36e067b2 | 79 | void gdb_memtohex(GString *buf, const uint8_t *mem, int len) |
b4608c04 FB |
80 | { |
81 | int i, c; | |
b4608c04 FB |
82 | for(i = 0; i < len; i++) { |
83 | c = mem[i]; | |
308f9e88 AB |
84 | g_string_append_c(buf, tohex(c >> 4)); |
85 | g_string_append_c(buf, tohex(c & 0xf)); | |
b4608c04 | 86 | } |
308f9e88 | 87 | g_string_append_c(buf, '\0'); |
b4608c04 FB |
88 | } |
89 | ||
36e067b2 | 90 | void gdb_hextomem(GByteArray *mem, const char *buf, int len) |
b4608c04 FB |
91 | { |
92 | int i; | |
93 | ||
94 | for(i = 0; i < len; i++) { | |
4a25f1b9 AB |
95 | guint8 byte = fromhex(buf[0]) << 4 | fromhex(buf[1]); |
96 | g_byte_array_append(mem, &byte, 1); | |
b4608c04 FB |
97 | buf += 2; |
98 | } | |
99 | } | |
100 | ||
5c9522b3 DG |
101 | static void hexdump(const char *buf, int len, |
102 | void (*trace_fn)(size_t ofs, char const *text)) | |
103 | { | |
104 | char line_buffer[3 * 16 + 4 + 16 + 1]; | |
105 | ||
106 | size_t i; | |
107 | for (i = 0; i < len || (i & 0xF); ++i) { | |
108 | size_t byte_ofs = i & 15; | |
109 | ||
110 | if (byte_ofs == 0) { | |
111 | memset(line_buffer, ' ', 3 * 16 + 4 + 16); | |
112 | line_buffer[3 * 16 + 4 + 16] = 0; | |
113 | } | |
114 | ||
115 | size_t col_group = (i >> 2) & 3; | |
116 | size_t hex_col = byte_ofs * 3 + col_group; | |
117 | size_t txt_col = 3 * 16 + 4 + byte_ofs; | |
118 | ||
119 | if (i < len) { | |
120 | char value = buf[i]; | |
121 | ||
122 | line_buffer[hex_col + 0] = tohex((value >> 4) & 0xF); | |
123 | line_buffer[hex_col + 1] = tohex((value >> 0) & 0xF); | |
124 | line_buffer[txt_col + 0] = (value >= ' ' && value < 127) | |
125 | ? value | |
126 | : '.'; | |
127 | } | |
128 | ||
129 | if (byte_ofs == 0xF) | |
130 | trace_fn(i & -16, line_buffer); | |
131 | } | |
132 | } | |
133 | ||
b4608c04 | 134 | /* return -1 if error, 0 if OK */ |
36e067b2 | 135 | int gdb_put_packet_binary(const char *buf, int len, bool dump) |
b4608c04 | 136 | { |
56aebc89 | 137 | int csum, i; |
d116e813 | 138 | uint8_t footer[3]; |
b4608c04 | 139 | |
5c9522b3 DG |
140 | if (dump && trace_event_get_state_backends(TRACE_GDBSTUB_IO_BINARYREPLY)) { |
141 | hexdump(buf, len, trace_gdbstub_io_binaryreply); | |
142 | } | |
143 | ||
b4608c04 | 144 | for(;;) { |
d116e813 DH |
145 | g_byte_array_set_size(gdbserver_state.last_packet, 0); |
146 | g_byte_array_append(gdbserver_state.last_packet, | |
147 | (const uint8_t *) "$", 1); | |
148 | g_byte_array_append(gdbserver_state.last_packet, | |
149 | (const uint8_t *) buf, len); | |
b4608c04 FB |
150 | csum = 0; |
151 | for(i = 0; i < len; i++) { | |
152 | csum += buf[i]; | |
153 | } | |
d116e813 DH |
154 | footer[0] = '#'; |
155 | footer[1] = tohex((csum >> 4) & 0xf); | |
156 | footer[2] = tohex((csum) & 0xf); | |
157 | g_byte_array_append(gdbserver_state.last_packet, footer, 3); | |
b4608c04 | 158 | |
36e067b2 | 159 | gdb_put_buffer(gdbserver_state.last_packet->data, |
d116e813 | 160 | gdbserver_state.last_packet->len); |
b4608c04 | 161 | |
a7e0f9bd | 162 | if (gdb_got_immediate_ack()) { |
b4608c04 | 163 | break; |
a7e0f9bd | 164 | } |
b4608c04 FB |
165 | } |
166 | return 0; | |
167 | } | |
168 | ||
56aebc89 | 169 | /* return -1 if error, 0 if OK */ |
36e067b2 | 170 | int gdb_put_packet(const char *buf) |
56aebc89 | 171 | { |
5c9522b3 | 172 | trace_gdbstub_io_reply(buf); |
79808573 | 173 | |
36e067b2 | 174 | return gdb_put_packet_binary(buf, strlen(buf), false); |
56aebc89 PB |
175 | } |
176 | ||
36e067b2 | 177 | void gdb_put_strbuf(void) |
308f9e88 | 178 | { |
36e067b2 | 179 | gdb_put_packet(gdbserver_state.str_buf->str); |
308f9e88 AB |
180 | } |
181 | ||
56aebc89 | 182 | /* Encode data using the encoding for 'x' packets. */ |
36e067b2 | 183 | void gdb_memtox(GString *buf, const char *mem, int len) |
56aebc89 | 184 | { |
56aebc89 PB |
185 | char c; |
186 | ||
187 | while (len--) { | |
188 | c = *(mem++); | |
189 | switch (c) { | |
190 | case '#': case '$': case '*': case '}': | |
308f9e88 AB |
191 | g_string_append_c(buf, '}'); |
192 | g_string_append_c(buf, c ^ 0x20); | |
56aebc89 PB |
193 | break; |
194 | default: | |
308f9e88 | 195 | g_string_append_c(buf, c); |
56aebc89 PB |
196 | break; |
197 | } | |
198 | } | |
56aebc89 | 199 | } |
f1ccf904 | 200 | |
a346af3e | 201 | static uint32_t gdb_get_cpu_pid(CPUState *cpu) |
1a227336 | 202 | { |
dc14a7a6 IL |
203 | #ifdef CONFIG_USER_ONLY |
204 | return getpid(); | |
205 | #else | |
46f5abc0 | 206 | if (cpu->cluster_index == UNASSIGNED_CLUSTER_INDEX) { |
1a227336 | 207 | /* Return the default process' PID */ |
a346af3e AB |
208 | int index = gdbserver_state.process_num - 1; |
209 | return gdbserver_state.processes[index].pid; | |
1a227336 | 210 | } |
46f5abc0 | 211 | return cpu->cluster_index + 1; |
dc14a7a6 | 212 | #endif |
1a227336 LM |
213 | } |
214 | ||
a3fcc111 | 215 | GDBProcess *gdb_get_process(uint32_t pid) |
7d8c87da LM |
216 | { |
217 | int i; | |
218 | ||
219 | if (!pid) { | |
220 | /* 0 means any process, we take the first one */ | |
a346af3e | 221 | return &gdbserver_state.processes[0]; |
7d8c87da LM |
222 | } |
223 | ||
a346af3e AB |
224 | for (i = 0; i < gdbserver_state.process_num; i++) { |
225 | if (gdbserver_state.processes[i].pid == pid) { | |
226 | return &gdbserver_state.processes[i]; | |
7d8c87da LM |
227 | } |
228 | } | |
229 | ||
230 | return NULL; | |
231 | } | |
232 | ||
a346af3e | 233 | static GDBProcess *gdb_get_cpu_process(CPUState *cpu) |
7d8c87da | 234 | { |
a346af3e | 235 | return gdb_get_process(gdb_get_cpu_pid(cpu)); |
7d8c87da LM |
236 | } |
237 | ||
238 | static CPUState *find_cpu(uint32_t thread_id) | |
239 | { | |
240 | CPUState *cpu; | |
241 | ||
242 | CPU_FOREACH(cpu) { | |
36e067b2 | 243 | if (gdb_get_cpu_index(cpu) == thread_id) { |
7d8c87da LM |
244 | return cpu; |
245 | } | |
246 | } | |
247 | ||
248 | return NULL; | |
249 | } | |
250 | ||
a3fcc111 | 251 | CPUState *gdb_get_first_cpu_in_process(GDBProcess *process) |
e40e5204 LM |
252 | { |
253 | CPUState *cpu; | |
254 | ||
255 | CPU_FOREACH(cpu) { | |
a346af3e | 256 | if (gdb_get_cpu_pid(cpu) == process->pid) { |
e40e5204 LM |
257 | return cpu; |
258 | } | |
259 | } | |
260 | ||
261 | return NULL; | |
262 | } | |
263 | ||
a346af3e | 264 | static CPUState *gdb_next_cpu_in_process(CPUState *cpu) |
e40e5204 | 265 | { |
a346af3e | 266 | uint32_t pid = gdb_get_cpu_pid(cpu); |
e40e5204 LM |
267 | cpu = CPU_NEXT(cpu); |
268 | ||
269 | while (cpu) { | |
a346af3e | 270 | if (gdb_get_cpu_pid(cpu) == pid) { |
e40e5204 LM |
271 | break; |
272 | } | |
273 | ||
274 | cpu = CPU_NEXT(cpu); | |
275 | } | |
276 | ||
277 | return cpu; | |
278 | } | |
279 | ||
e40e5204 | 280 | /* Return the cpu following @cpu, while ignoring unattached processes. */ |
a346af3e | 281 | static CPUState *gdb_next_attached_cpu(CPUState *cpu) |
e40e5204 LM |
282 | { |
283 | cpu = CPU_NEXT(cpu); | |
284 | ||
285 | while (cpu) { | |
a346af3e | 286 | if (gdb_get_cpu_process(cpu)->attached) { |
e40e5204 LM |
287 | break; |
288 | } | |
289 | ||
290 | cpu = CPU_NEXT(cpu); | |
291 | } | |
292 | ||
293 | return cpu; | |
294 | } | |
295 | ||
296 | /* Return the first attached cpu */ | |
36e067b2 | 297 | CPUState *gdb_first_attached_cpu(void) |
e40e5204 LM |
298 | { |
299 | CPUState *cpu = first_cpu; | |
a346af3e | 300 | GDBProcess *process = gdb_get_cpu_process(cpu); |
e40e5204 LM |
301 | |
302 | if (!process->attached) { | |
a346af3e | 303 | return gdb_next_attached_cpu(cpu); |
e40e5204 LM |
304 | } |
305 | ||
306 | return cpu; | |
307 | } | |
308 | ||
a346af3e | 309 | static CPUState *gdb_get_cpu(uint32_t pid, uint32_t tid) |
ab65eed3 LM |
310 | { |
311 | GDBProcess *process; | |
312 | CPUState *cpu; | |
313 | ||
314 | if (!pid && !tid) { | |
315 | /* 0 means any process/thread, we take the first attached one */ | |
a346af3e | 316 | return gdb_first_attached_cpu(); |
ab65eed3 LM |
317 | } else if (pid && !tid) { |
318 | /* any thread in a specific process */ | |
a346af3e | 319 | process = gdb_get_process(pid); |
ab65eed3 LM |
320 | |
321 | if (process == NULL) { | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | if (!process->attached) { | |
326 | return NULL; | |
327 | } | |
328 | ||
a3fcc111 | 329 | return gdb_get_first_cpu_in_process(process); |
ab65eed3 LM |
330 | } else { |
331 | /* a specific thread */ | |
332 | cpu = find_cpu(tid); | |
333 | ||
334 | if (cpu == NULL) { | |
335 | return NULL; | |
336 | } | |
337 | ||
a346af3e | 338 | process = gdb_get_cpu_process(cpu); |
ab65eed3 LM |
339 | |
340 | if (pid && process->pid != pid) { | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | if (!process->attached) { | |
345 | return NULL; | |
346 | } | |
347 | ||
348 | return cpu; | |
349 | } | |
350 | } | |
351 | ||
d0e5fa84 AB |
352 | bool gdb_has_xml(void) |
353 | { | |
354 | return !!gdb_get_cpu_process(gdbserver_state.g_cpu)->target_xml; | |
355 | } | |
356 | ||
a346af3e AB |
357 | static const char *get_feature_xml(const char *p, const char **newp, |
358 | GDBProcess *process) | |
56aebc89 | 359 | { |
a3fcc111 | 360 | CPUState *cpu = gdb_get_first_cpu_in_process(process); |
c145eeae | 361 | CPUClass *cc = CPU_GET_CLASS(cpu); |
56e534bd | 362 | size_t len; |
56aebc89 | 363 | |
56e534bd AB |
364 | /* |
365 | * qXfer:features:read:ANNEX:OFFSET,LENGTH' | |
366 | * ^p ^newp | |
367 | */ | |
368 | char *term = strchr(p, ':'); | |
369 | *newp = term + 1; | |
370 | len = term - p; | |
56aebc89 | 371 | |
56e534bd | 372 | /* Is it the main target xml? */ |
56aebc89 | 373 | if (strncmp(p, "target.xml", len) == 0) { |
56e534bd | 374 | if (!process->target_xml) { |
56aebc89 | 375 | GDBRegisterState *r; |
56e534bd AB |
376 | GString *xml = g_string_new("<?xml version=\"1.0\"?>"); |
377 | ||
378 | g_string_append(xml, | |
379 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">" | |
380 | "<target>"); | |
56aebc89 | 381 | |
b3820e6c | 382 | if (cc->gdb_arch_name) { |
56e534bd AB |
383 | g_autofree gchar *arch = cc->gdb_arch_name(cpu); |
384 | g_string_append_printf(xml, | |
385 | "<architecture>%s</architecture>", | |
386 | arch); | |
b3820e6c | 387 | } |
56e534bd AB |
388 | g_string_append(xml, "<xi:include href=\""); |
389 | g_string_append(xml, cc->gdb_core_xml_file); | |
390 | g_string_append(xml, "\"/>"); | |
eac8b355 | 391 | for (r = cpu->gdb_regs; r; r = r->next) { |
56e534bd AB |
392 | g_string_append(xml, "<xi:include href=\""); |
393 | g_string_append(xml, r->xml); | |
394 | g_string_append(xml, "\"/>"); | |
56aebc89 | 395 | } |
56e534bd AB |
396 | g_string_append(xml, "</target>"); |
397 | ||
398 | process->target_xml = g_string_free(xml, false); | |
56aebc89 | 399 | } |
5d1ab242 | 400 | return process->target_xml; |
56aebc89 | 401 | } |
56e534bd | 402 | /* Is it dynamically generated by the target? */ |
200bf5b7 | 403 | if (cc->gdb_get_dynamic_xml) { |
56e534bd | 404 | g_autofree char *xmlname = g_strndup(p, len); |
200bf5b7 | 405 | const char *xml = cc->gdb_get_dynamic_xml(cpu, xmlname); |
200bf5b7 AB |
406 | if (xml) { |
407 | return xml; | |
408 | } | |
409 | } | |
56e534bd | 410 | /* Is it one of the encoded gdb-xml/ files? */ |
956af7da AO |
411 | for (int i = 0; gdb_static_features[i].xmlname; i++) { |
412 | const char *name = gdb_static_features[i].xmlname; | |
56e534bd AB |
413 | if ((strncmp(name, p, len) == 0) && |
414 | strlen(name) == len) { | |
956af7da | 415 | return gdb_static_features[i].xml; |
56e534bd | 416 | } |
56aebc89 | 417 | } |
56e534bd AB |
418 | |
419 | /* failed */ | |
420 | return NULL; | |
56aebc89 | 421 | } |
f1ccf904 | 422 | |
a010bdbe | 423 | static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg) |
56aebc89 | 424 | { |
a0e372f0 | 425 | CPUClass *cc = CPU_GET_CLASS(cpu); |
b77af26e | 426 | CPUArchState *env = cpu_env(cpu); |
56aebc89 | 427 | GDBRegisterState *r; |
f1ccf904 | 428 | |
a0e372f0 | 429 | if (reg < cc->gdb_num_core_regs) { |
a010bdbe | 430 | return cc->gdb_read_register(cpu, buf, reg); |
a0e372f0 | 431 | } |
f1ccf904 | 432 | |
eac8b355 | 433 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 | 434 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
a010bdbe | 435 | return r->get_reg(env, buf, reg - r->base_reg); |
56aebc89 PB |
436 | } |
437 | } | |
438 | return 0; | |
f1ccf904 TS |
439 | } |
440 | ||
385b9f0e | 441 | static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
f1ccf904 | 442 | { |
a0e372f0 | 443 | CPUClass *cc = CPU_GET_CLASS(cpu); |
b77af26e | 444 | CPUArchState *env = cpu_env(cpu); |
56aebc89 | 445 | GDBRegisterState *r; |
f1ccf904 | 446 | |
a0e372f0 | 447 | if (reg < cc->gdb_num_core_regs) { |
5b50e790 | 448 | return cc->gdb_write_register(cpu, mem_buf, reg); |
a0e372f0 | 449 | } |
56aebc89 | 450 | |
eac8b355 | 451 | for (r = cpu->gdb_regs; r; r = r->next) { |
56aebc89 PB |
452 | if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { |
453 | return r->set_reg(env, mem_buf, reg - r->base_reg); | |
454 | } | |
455 | } | |
6da41eaf FB |
456 | return 0; |
457 | } | |
458 | ||
22169d41 | 459 | void gdb_register_coprocessor(CPUState *cpu, |
a010bdbe | 460 | gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg, |
22169d41 | 461 | int num_regs, const char *xml, int g_pos) |
6da41eaf | 462 | { |
56aebc89 PB |
463 | GDBRegisterState *s; |
464 | GDBRegisterState **p; | |
56aebc89 | 465 | |
eac8b355 | 466 | p = &cpu->gdb_regs; |
56aebc89 PB |
467 | while (*p) { |
468 | /* Check for duplicates. */ | |
469 | if (strcmp((*p)->xml, xml) == 0) | |
470 | return; | |
471 | p = &(*p)->next; | |
472 | } | |
9643c25f SW |
473 | |
474 | s = g_new0(GDBRegisterState, 1); | |
a0e372f0 | 475 | s->base_reg = cpu->gdb_num_regs; |
9643c25f SW |
476 | s->num_regs = num_regs; |
477 | s->get_reg = get_reg; | |
478 | s->set_reg = set_reg; | |
479 | s->xml = xml; | |
480 | ||
56aebc89 | 481 | /* Add to end of list. */ |
a0e372f0 | 482 | cpu->gdb_num_regs += num_regs; |
56aebc89 PB |
483 | *p = s; |
484 | if (g_pos) { | |
485 | if (g_pos != s->base_reg) { | |
7ae6c571 ZY |
486 | error_report("Error: Bad gdb register numbering for '%s', " |
487 | "expected %d got %d", xml, g_pos, s->base_reg); | |
35143f01 AF |
488 | } else { |
489 | cpu->gdb_num_g_regs = cpu->gdb_num_regs; | |
56aebc89 PB |
490 | } |
491 | } | |
6da41eaf FB |
492 | } |
493 | ||
a346af3e | 494 | static void gdb_process_breakpoint_remove_all(GDBProcess *p) |
546f3c67 | 495 | { |
a3fcc111 | 496 | CPUState *cpu = gdb_get_first_cpu_in_process(p); |
546f3c67 LM |
497 | |
498 | while (cpu) { | |
ae7467b1 | 499 | gdb_breakpoint_remove_all(cpu); |
a346af3e | 500 | cpu = gdb_next_cpu_in_process(cpu); |
546f3c67 LM |
501 | } |
502 | } | |
503 | ||
a1d1bb31 | 504 | |
b428ad12 | 505 | static void gdb_set_cpu_pc(vaddr pc) |
fab9d284 | 506 | { |
a346af3e | 507 | CPUState *cpu = gdbserver_state.c_cpu; |
f45748f1 AF |
508 | |
509 | cpu_synchronize_state(cpu); | |
4a2b24ed | 510 | cpu_set_pc(cpu, pc); |
fab9d284 AJ |
511 | } |
512 | ||
36e067b2 | 513 | void gdb_append_thread_id(CPUState *cpu, GString *buf) |
1a227336 | 514 | { |
a346af3e | 515 | if (gdbserver_state.multiprocess) { |
308f9e88 | 516 | g_string_append_printf(buf, "p%02x.%02x", |
36e067b2 | 517 | gdb_get_cpu_pid(cpu), gdb_get_cpu_index(cpu)); |
1a227336 | 518 | } else { |
36e067b2 | 519 | g_string_append_printf(buf, "%02x", gdb_get_cpu_index(cpu)); |
1a227336 | 520 | } |
1a227336 LM |
521 | } |
522 | ||
7d8c87da LM |
523 | static GDBThreadIdKind read_thread_id(const char *buf, const char **end_buf, |
524 | uint32_t *pid, uint32_t *tid) | |
525 | { | |
526 | unsigned long p, t; | |
527 | int ret; | |
528 | ||
529 | if (*buf == 'p') { | |
530 | buf++; | |
531 | ret = qemu_strtoul(buf, &buf, 16, &p); | |
532 | ||
533 | if (ret) { | |
534 | return GDB_READ_THREAD_ERR; | |
535 | } | |
536 | ||
537 | /* Skip '.' */ | |
538 | buf++; | |
539 | } else { | |
6c78de6e | 540 | p = 0; |
7d8c87da LM |
541 | } |
542 | ||
543 | ret = qemu_strtoul(buf, &buf, 16, &t); | |
544 | ||
545 | if (ret) { | |
546 | return GDB_READ_THREAD_ERR; | |
547 | } | |
548 | ||
549 | *end_buf = buf; | |
550 | ||
551 | if (p == -1) { | |
552 | return GDB_ALL_PROCESSES; | |
553 | } | |
554 | ||
555 | if (pid) { | |
556 | *pid = p; | |
557 | } | |
558 | ||
559 | if (t == -1) { | |
560 | return GDB_ALL_THREADS; | |
561 | } | |
562 | ||
563 | if (tid) { | |
564 | *tid = t; | |
565 | } | |
566 | ||
567 | return GDB_ONE_THREAD; | |
568 | } | |
569 | ||
544177ad CI |
570 | /** |
571 | * gdb_handle_vcont - Parses and handles a vCont packet. | |
572 | * returns -ENOTSUP if a command is unsupported, -EINVAL or -ERANGE if there is | |
573 | * a format error, 0 on success. | |
574 | */ | |
a346af3e | 575 | static int gdb_handle_vcont(const char *p) |
544177ad | 576 | { |
e40e5204 | 577 | int res, signal = 0; |
544177ad | 578 | char cur_action; |
544177ad | 579 | unsigned long tmp; |
e40e5204 LM |
580 | uint32_t pid, tid; |
581 | GDBProcess *process; | |
544177ad | 582 | CPUState *cpu; |
c99ef792 | 583 | GDBThreadIdKind kind; |
7ea0c33d | 584 | unsigned int max_cpus = gdb_get_max_cpus(); |
544177ad | 585 | /* uninitialised CPUs stay 0 */ |
2261b73c | 586 | g_autofree char *newstates = g_new0(char, max_cpus); |
544177ad CI |
587 | |
588 | /* mark valid CPUs with 1 */ | |
589 | CPU_FOREACH(cpu) { | |
590 | newstates[cpu->cpu_index] = 1; | |
591 | } | |
592 | ||
593 | /* | |
594 | * res keeps track of what error we are returning, with -ENOTSUP meaning | |
595 | * that the command is unknown or unsupported, thus returning an empty | |
596 | * packet, while -EINVAL and -ERANGE cause an E22 packet, due to invalid, | |
597 | * or incorrect parameters passed. | |
598 | */ | |
599 | res = 0; | |
761e3c10 MBB |
600 | |
601 | /* | |
602 | * target_count and last_target keep track of how many CPUs we are going to | |
603 | * step or resume, and a pointer to the state structure of one of them, | |
604 | * respectivelly | |
605 | */ | |
606 | int target_count = 0; | |
607 | CPUState *last_target = NULL; | |
608 | ||
544177ad CI |
609 | while (*p) { |
610 | if (*p++ != ';') { | |
2261b73c | 611 | return -ENOTSUP; |
544177ad CI |
612 | } |
613 | ||
614 | cur_action = *p++; | |
615 | if (cur_action == 'C' || cur_action == 'S') { | |
95a5befc | 616 | cur_action = qemu_tolower(cur_action); |
3ddd9036 | 617 | res = qemu_strtoul(p, &p, 16, &tmp); |
544177ad | 618 | if (res) { |
2261b73c | 619 | return res; |
544177ad CI |
620 | } |
621 | signal = gdb_signal_to_target(tmp); | |
622 | } else if (cur_action != 'c' && cur_action != 's') { | |
623 | /* unknown/invalid/unsupported command */ | |
2261b73c | 624 | return -ENOTSUP; |
544177ad | 625 | } |
e40e5204 | 626 | |
c99ef792 LM |
627 | if (*p == '\0' || *p == ';') { |
628 | /* | |
629 | * No thread specifier, action is on "all threads". The | |
630 | * specification is unclear regarding the process to act on. We | |
631 | * choose all processes. | |
632 | */ | |
633 | kind = GDB_ALL_PROCESSES; | |
634 | } else if (*p++ == ':') { | |
635 | kind = read_thread_id(p, &p, &pid, &tid); | |
636 | } else { | |
2261b73c | 637 | return -ENOTSUP; |
e40e5204 LM |
638 | } |
639 | ||
c99ef792 | 640 | switch (kind) { |
e40e5204 | 641 | case GDB_READ_THREAD_ERR: |
2261b73c | 642 | return -EINVAL; |
e40e5204 LM |
643 | |
644 | case GDB_ALL_PROCESSES: | |
a346af3e | 645 | cpu = gdb_first_attached_cpu(); |
e40e5204 LM |
646 | while (cpu) { |
647 | if (newstates[cpu->cpu_index] == 1) { | |
648 | newstates[cpu->cpu_index] = cur_action; | |
761e3c10 MBB |
649 | |
650 | target_count++; | |
651 | last_target = cpu; | |
544177ad | 652 | } |
e40e5204 | 653 | |
a346af3e | 654 | cpu = gdb_next_attached_cpu(cpu); |
544177ad | 655 | } |
e40e5204 LM |
656 | break; |
657 | ||
658 | case GDB_ALL_THREADS: | |
a346af3e | 659 | process = gdb_get_process(pid); |
e40e5204 LM |
660 | |
661 | if (!process->attached) { | |
2261b73c | 662 | return -EINVAL; |
544177ad | 663 | } |
5a6a1ad1 | 664 | |
a3fcc111 | 665 | cpu = gdb_get_first_cpu_in_process(process); |
e40e5204 LM |
666 | while (cpu) { |
667 | if (newstates[cpu->cpu_index] == 1) { | |
668 | newstates[cpu->cpu_index] = cur_action; | |
761e3c10 MBB |
669 | |
670 | target_count++; | |
671 | last_target = cpu; | |
e40e5204 LM |
672 | } |
673 | ||
a346af3e | 674 | cpu = gdb_next_cpu_in_process(cpu); |
e40e5204 LM |
675 | } |
676 | break; | |
677 | ||
678 | case GDB_ONE_THREAD: | |
a346af3e | 679 | cpu = gdb_get_cpu(pid, tid); |
544177ad | 680 | |
544177ad | 681 | /* invalid CPU/thread specified */ |
5a6a1ad1 | 682 | if (!cpu) { |
2261b73c | 683 | return -EINVAL; |
544177ad | 684 | } |
5a6a1ad1 | 685 | |
544177ad CI |
686 | /* only use if no previous match occourred */ |
687 | if (newstates[cpu->cpu_index] == 1) { | |
688 | newstates[cpu->cpu_index] = cur_action; | |
761e3c10 MBB |
689 | |
690 | target_count++; | |
691 | last_target = cpu; | |
544177ad | 692 | } |
e40e5204 | 693 | break; |
544177ad CI |
694 | } |
695 | } | |
2261b73c | 696 | |
761e3c10 MBB |
697 | /* |
698 | * if we're about to resume a specific set of CPUs/threads, make it so that | |
699 | * in case execution gets interrupted, we can send GDB a stop reply with a | |
700 | * correct value. it doesn't really matter which CPU we tell GDB the signal | |
701 | * happened in (VM pauses stop all of them anyway), so long as it is one of | |
702 | * the ones we resumed/single stepped here. | |
703 | */ | |
704 | if (target_count > 0) { | |
705 | gdbserver_state.c_cpu = last_target; | |
706 | } | |
707 | ||
a346af3e AB |
708 | gdbserver_state.signal = signal; |
709 | gdb_continue_partial(newstates); | |
544177ad CI |
710 | return res; |
711 | } | |
712 | ||
d14055dc JD |
713 | static const char *cmd_next_param(const char *param, const char delimiter) |
714 | { | |
715 | static const char all_delimiters[] = ",;:="; | |
716 | char curr_delimiters[2] = {0}; | |
717 | const char *delimiters; | |
718 | ||
719 | if (delimiter == '?') { | |
720 | delimiters = all_delimiters; | |
721 | } else if (delimiter == '0') { | |
722 | return strchr(param, '\0'); | |
723 | } else if (delimiter == '.' && *param) { | |
724 | return param + 1; | |
725 | } else { | |
726 | curr_delimiters[0] = delimiter; | |
727 | delimiters = curr_delimiters; | |
728 | } | |
729 | ||
730 | param += strcspn(param, delimiters); | |
731 | if (*param) { | |
732 | param++; | |
733 | } | |
734 | return param; | |
735 | } | |
736 | ||
737 | static int cmd_parse_params(const char *data, const char *schema, | |
26a16181 | 738 | GArray *params) |
d14055dc | 739 | { |
d14055dc JD |
740 | const char *curr_schema, *curr_data; |
741 | ||
26a16181 AB |
742 | g_assert(schema); |
743 | g_assert(params->len == 0); | |
d14055dc JD |
744 | |
745 | curr_schema = schema; | |
d14055dc JD |
746 | curr_data = data; |
747 | while (curr_schema[0] && curr_schema[1] && *curr_data) { | |
26a16181 AB |
748 | GdbCmdVariant this_param; |
749 | ||
d14055dc JD |
750 | switch (curr_schema[0]) { |
751 | case 'l': | |
752 | if (qemu_strtoul(curr_data, &curr_data, 16, | |
26a16181 | 753 | &this_param.val_ul)) { |
d14055dc JD |
754 | return -EINVAL; |
755 | } | |
d14055dc | 756 | curr_data = cmd_next_param(curr_data, curr_schema[1]); |
26a16181 | 757 | g_array_append_val(params, this_param); |
d14055dc JD |
758 | break; |
759 | case 'L': | |
760 | if (qemu_strtou64(curr_data, &curr_data, 16, | |
26a16181 | 761 | (uint64_t *)&this_param.val_ull)) { |
d14055dc JD |
762 | return -EINVAL; |
763 | } | |
d14055dc | 764 | curr_data = cmd_next_param(curr_data, curr_schema[1]); |
26a16181 | 765 | g_array_append_val(params, this_param); |
d14055dc JD |
766 | break; |
767 | case 's': | |
26a16181 | 768 | this_param.data = curr_data; |
d14055dc | 769 | curr_data = cmd_next_param(curr_data, curr_schema[1]); |
26a16181 | 770 | g_array_append_val(params, this_param); |
d14055dc JD |
771 | break; |
772 | case 'o': | |
26a16181 | 773 | this_param.opcode = *(uint8_t *)curr_data; |
d14055dc | 774 | curr_data = cmd_next_param(curr_data, curr_schema[1]); |
26a16181 | 775 | g_array_append_val(params, this_param); |
d14055dc JD |
776 | break; |
777 | case 't': | |
26a16181 | 778 | this_param.thread_id.kind = |
d14055dc | 779 | read_thread_id(curr_data, &curr_data, |
26a16181 AB |
780 | &this_param.thread_id.pid, |
781 | &this_param.thread_id.tid); | |
d14055dc | 782 | curr_data = cmd_next_param(curr_data, curr_schema[1]); |
26a16181 | 783 | g_array_append_val(params, this_param); |
d14055dc JD |
784 | break; |
785 | case '?': | |
786 | curr_data = cmd_next_param(curr_data, curr_schema[1]); | |
787 | break; | |
788 | default: | |
789 | return -EINVAL; | |
790 | } | |
791 | curr_schema += 2; | |
792 | } | |
793 | ||
d14055dc JD |
794 | return 0; |
795 | } | |
796 | ||
26a16181 | 797 | typedef void (*GdbCmdHandler)(GArray *params, void *user_ctx); |
d14055dc JD |
798 | |
799 | /* | |
800 | * cmd_startswith -> cmd is compared using startswith | |
801 | * | |
75837005 MTB |
802 | * allow_stop_reply -> true iff the gdbstub can respond to this command with a |
803 | * "stop reply" packet. The list of commands that accept such response is | |
804 | * defined at the GDB Remote Serial Protocol documentation. see: | |
805 | * https://sourceware.org/gdb/onlinedocs/gdb/Stop-Reply-Packets.html#Stop-Reply-Packets. | |
d14055dc JD |
806 | * |
807 | * schema definitions: | |
808 | * Each schema parameter entry consists of 2 chars, | |
809 | * the first char represents the parameter type handling | |
810 | * the second char represents the delimiter for the next parameter | |
811 | * | |
812 | * Currently supported schema types: | |
813 | * 'l' -> unsigned long (stored in .val_ul) | |
814 | * 'L' -> unsigned long long (stored in .val_ull) | |
815 | * 's' -> string (stored in .data) | |
816 | * 'o' -> single char (stored in .opcode) | |
817 | * 't' -> thread id (stored in .thread_id) | |
818 | * '?' -> skip according to delimiter | |
819 | * | |
820 | * Currently supported delimiters: | |
821 | * '?' -> Stop at any delimiter (",;:=\0") | |
822 | * '0' -> Stop at "\0" | |
823 | * '.' -> Skip 1 char unless reached "\0" | |
824 | * Any other value is treated as the delimiter value itself | |
825 | */ | |
826 | typedef struct GdbCmdParseEntry { | |
827 | GdbCmdHandler handler; | |
828 | const char *cmd; | |
829 | bool cmd_startswith; | |
830 | const char *schema; | |
75837005 | 831 | bool allow_stop_reply; |
d14055dc JD |
832 | } GdbCmdParseEntry; |
833 | ||
834 | static inline int startswith(const char *string, const char *pattern) | |
835 | { | |
836 | return !strncmp(string, pattern, strlen(pattern)); | |
837 | } | |
838 | ||
5b030993 | 839 | static int process_string_cmd(const char *data, |
d14055dc JD |
840 | const GdbCmdParseEntry *cmds, int num_cmds) |
841 | { | |
26a16181 AB |
842 | int i; |
843 | g_autoptr(GArray) params = g_array_new(false, true, sizeof(GdbCmdVariant)); | |
d14055dc JD |
844 | |
845 | if (!cmds) { | |
846 | return -1; | |
847 | } | |
848 | ||
849 | for (i = 0; i < num_cmds; i++) { | |
850 | const GdbCmdParseEntry *cmd = &cmds[i]; | |
851 | g_assert(cmd->handler && cmd->cmd); | |
852 | ||
853 | if ((cmd->cmd_startswith && !startswith(data, cmd->cmd)) || | |
854 | (!cmd->cmd_startswith && strcmp(cmd->cmd, data))) { | |
855 | continue; | |
856 | } | |
857 | ||
858 | if (cmd->schema) { | |
26a16181 AB |
859 | if (cmd_parse_params(&data[strlen(cmd->cmd)], |
860 | cmd->schema, params)) { | |
861 | return -1; | |
d14055dc | 862 | } |
d14055dc JD |
863 | } |
864 | ||
75837005 | 865 | gdbserver_state.allow_stop_reply = cmd->allow_stop_reply; |
5b030993 | 866 | cmd->handler(params, NULL); |
d14055dc JD |
867 | return 0; |
868 | } | |
869 | ||
870 | return -1; | |
871 | } | |
872 | ||
a346af3e | 873 | static void run_cmd_parser(const char *data, const GdbCmdParseEntry *cmd) |
3e2c1261 JD |
874 | { |
875 | if (!data) { | |
876 | return; | |
877 | } | |
878 | ||
308f9e88 | 879 | g_string_set_size(gdbserver_state.str_buf, 0); |
4a25f1b9 | 880 | g_byte_array_set_size(gdbserver_state.mem_buf, 0); |
308f9e88 | 881 | |
3e2c1261 JD |
882 | /* In case there was an error during the command parsing we must |
883 | * send a NULL packet to indicate the command is not supported */ | |
5b030993 | 884 | if (process_string_cmd(data, cmd, 1)) { |
36e067b2 | 885 | gdb_put_packet(""); |
3e2c1261 JD |
886 | } |
887 | } | |
888 | ||
26a16181 | 889 | static void handle_detach(GArray *params, void *user_ctx) |
3e2c1261 JD |
890 | { |
891 | GDBProcess *process; | |
3e2c1261 JD |
892 | uint32_t pid = 1; |
893 | ||
a346af3e | 894 | if (gdbserver_state.multiprocess) { |
26a16181 | 895 | if (!params->len) { |
36e067b2 | 896 | gdb_put_packet("E22"); |
3e2c1261 JD |
897 | return; |
898 | } | |
899 | ||
26a16181 | 900 | pid = get_param(params, 0)->val_ul; |
3e2c1261 JD |
901 | } |
902 | ||
a346af3e AB |
903 | process = gdb_get_process(pid); |
904 | gdb_process_breakpoint_remove_all(process); | |
3e2c1261 JD |
905 | process->attached = false; |
906 | ||
a346af3e AB |
907 | if (pid == gdb_get_cpu_pid(gdbserver_state.c_cpu)) { |
908 | gdbserver_state.c_cpu = gdb_first_attached_cpu(); | |
3e2c1261 JD |
909 | } |
910 | ||
a346af3e AB |
911 | if (pid == gdb_get_cpu_pid(gdbserver_state.g_cpu)) { |
912 | gdbserver_state.g_cpu = gdb_first_attached_cpu(); | |
3e2c1261 JD |
913 | } |
914 | ||
a346af3e | 915 | if (!gdbserver_state.c_cpu) { |
3e2c1261 | 916 | /* No more process attached */ |
c566080c | 917 | gdb_disable_syscalls(); |
a346af3e | 918 | gdb_continue(); |
3e2c1261 | 919 | } |
36e067b2 | 920 | gdb_put_packet("OK"); |
3e2c1261 JD |
921 | } |
922 | ||
26a16181 | 923 | static void handle_thread_alive(GArray *params, void *user_ctx) |
44ffded0 JD |
924 | { |
925 | CPUState *cpu; | |
926 | ||
26a16181 | 927 | if (!params->len) { |
36e067b2 | 928 | gdb_put_packet("E22"); |
44ffded0 JD |
929 | return; |
930 | } | |
931 | ||
26a16181 | 932 | if (get_param(params, 0)->thread_id.kind == GDB_READ_THREAD_ERR) { |
36e067b2 | 933 | gdb_put_packet("E22"); |
44ffded0 JD |
934 | return; |
935 | } | |
936 | ||
26a16181 AB |
937 | cpu = gdb_get_cpu(get_param(params, 0)->thread_id.pid, |
938 | get_param(params, 0)->thread_id.tid); | |
44ffded0 | 939 | if (!cpu) { |
36e067b2 | 940 | gdb_put_packet("E22"); |
44ffded0 JD |
941 | return; |
942 | } | |
943 | ||
36e067b2 | 944 | gdb_put_packet("OK"); |
44ffded0 JD |
945 | } |
946 | ||
26a16181 | 947 | static void handle_continue(GArray *params, void *user_ctx) |
4d6e3fe2 | 948 | { |
26a16181 AB |
949 | if (params->len) { |
950 | gdb_set_cpu_pc(get_param(params, 0)->val_ull); | |
4d6e3fe2 JD |
951 | } |
952 | ||
a346af3e AB |
953 | gdbserver_state.signal = 0; |
954 | gdb_continue(); | |
4d6e3fe2 JD |
955 | } |
956 | ||
26a16181 | 957 | static void handle_cont_with_sig(GArray *params, void *user_ctx) |
ccc47d5d JD |
958 | { |
959 | unsigned long signal = 0; | |
960 | ||
961 | /* | |
962 | * Note: C sig;[addr] is currently unsupported and we simply | |
963 | * omit the addr parameter | |
964 | */ | |
26a16181 AB |
965 | if (params->len) { |
966 | signal = get_param(params, 0)->val_ul; | |
ccc47d5d JD |
967 | } |
968 | ||
a346af3e AB |
969 | gdbserver_state.signal = gdb_signal_to_target(signal); |
970 | if (gdbserver_state.signal == -1) { | |
971 | gdbserver_state.signal = 0; | |
ccc47d5d | 972 | } |
a346af3e | 973 | gdb_continue(); |
ccc47d5d JD |
974 | } |
975 | ||
26a16181 | 976 | static void handle_set_thread(GArray *params, void *user_ctx) |
3a9651d6 JD |
977 | { |
978 | CPUState *cpu; | |
979 | ||
26a16181 | 980 | if (params->len != 2) { |
36e067b2 | 981 | gdb_put_packet("E22"); |
3a9651d6 JD |
982 | return; |
983 | } | |
984 | ||
26a16181 | 985 | if (get_param(params, 1)->thread_id.kind == GDB_READ_THREAD_ERR) { |
36e067b2 | 986 | gdb_put_packet("E22"); |
3a9651d6 JD |
987 | return; |
988 | } | |
989 | ||
26a16181 | 990 | if (get_param(params, 1)->thread_id.kind != GDB_ONE_THREAD) { |
36e067b2 | 991 | gdb_put_packet("OK"); |
3a9651d6 JD |
992 | return; |
993 | } | |
994 | ||
26a16181 AB |
995 | cpu = gdb_get_cpu(get_param(params, 1)->thread_id.pid, |
996 | get_param(params, 1)->thread_id.tid); | |
3a9651d6 | 997 | if (!cpu) { |
36e067b2 | 998 | gdb_put_packet("E22"); |
3a9651d6 JD |
999 | return; |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * Note: This command is deprecated and modern gdb's will be using the | |
1004 | * vCont command instead. | |
1005 | */ | |
26a16181 | 1006 | switch (get_param(params, 0)->opcode) { |
3a9651d6 | 1007 | case 'c': |
a346af3e | 1008 | gdbserver_state.c_cpu = cpu; |
36e067b2 | 1009 | gdb_put_packet("OK"); |
3a9651d6 JD |
1010 | break; |
1011 | case 'g': | |
a346af3e | 1012 | gdbserver_state.g_cpu = cpu; |
36e067b2 | 1013 | gdb_put_packet("OK"); |
3a9651d6 JD |
1014 | break; |
1015 | default: | |
36e067b2 | 1016 | gdb_put_packet("E22"); |
3a9651d6 JD |
1017 | break; |
1018 | } | |
1019 | } | |
1020 | ||
26a16181 | 1021 | static void handle_insert_bp(GArray *params, void *user_ctx) |
77f6ce50 JD |
1022 | { |
1023 | int res; | |
1024 | ||
26a16181 | 1025 | if (params->len != 3) { |
36e067b2 | 1026 | gdb_put_packet("E22"); |
77f6ce50 JD |
1027 | return; |
1028 | } | |
1029 | ||
ae7467b1 AB |
1030 | res = gdb_breakpoint_insert(gdbserver_state.c_cpu, |
1031 | get_param(params, 0)->val_ul, | |
26a16181 AB |
1032 | get_param(params, 1)->val_ull, |
1033 | get_param(params, 2)->val_ull); | |
77f6ce50 | 1034 | if (res >= 0) { |
36e067b2 | 1035 | gdb_put_packet("OK"); |
77f6ce50 JD |
1036 | return; |
1037 | } else if (res == -ENOSYS) { | |
36e067b2 | 1038 | gdb_put_packet(""); |
77f6ce50 JD |
1039 | return; |
1040 | } | |
1041 | ||
36e067b2 | 1042 | gdb_put_packet("E22"); |
77f6ce50 JD |
1043 | } |
1044 | ||
26a16181 | 1045 | static void handle_remove_bp(GArray *params, void *user_ctx) |
77f6ce50 JD |
1046 | { |
1047 | int res; | |
1048 | ||
26a16181 | 1049 | if (params->len != 3) { |
36e067b2 | 1050 | gdb_put_packet("E22"); |
77f6ce50 JD |
1051 | return; |
1052 | } | |
1053 | ||
ae7467b1 AB |
1054 | res = gdb_breakpoint_remove(gdbserver_state.c_cpu, |
1055 | get_param(params, 0)->val_ul, | |
26a16181 AB |
1056 | get_param(params, 1)->val_ull, |
1057 | get_param(params, 2)->val_ull); | |
77f6ce50 | 1058 | if (res >= 0) { |
36e067b2 | 1059 | gdb_put_packet("OK"); |
77f6ce50 JD |
1060 | return; |
1061 | } else if (res == -ENOSYS) { | |
36e067b2 | 1062 | gdb_put_packet(""); |
77f6ce50 JD |
1063 | return; |
1064 | } | |
1065 | ||
36e067b2 | 1066 | gdb_put_packet("E22"); |
77f6ce50 JD |
1067 | } |
1068 | ||
94b2a62b AB |
1069 | /* |
1070 | * handle_set/get_reg | |
1071 | * | |
1072 | * Older gdb are really dumb, and don't use 'G/g' if 'P/p' is available. | |
1073 | * This works, but can be very slow. Anything new enough to understand | |
1074 | * XML also knows how to use this properly. However to use this we | |
1075 | * need to define a local XML file as well as be talking to a | |
1076 | * reasonably modern gdb. Responding with an empty packet will cause | |
1077 | * the remote gdb to fallback to older methods. | |
1078 | */ | |
1079 | ||
26a16181 | 1080 | static void handle_set_reg(GArray *params, void *user_ctx) |
62b3320b JD |
1081 | { |
1082 | int reg_size; | |
1083 | ||
d0e5fa84 | 1084 | if (!gdb_get_cpu_process(gdbserver_state.g_cpu)->target_xml) { |
36e067b2 | 1085 | gdb_put_packet(""); |
62b3320b JD |
1086 | return; |
1087 | } | |
1088 | ||
26a16181 | 1089 | if (params->len != 2) { |
36e067b2 | 1090 | gdb_put_packet("E22"); |
62b3320b JD |
1091 | return; |
1092 | } | |
1093 | ||
26a16181 | 1094 | reg_size = strlen(get_param(params, 1)->data) / 2; |
36e067b2 | 1095 | gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 1)->data, reg_size); |
4a25f1b9 | 1096 | gdb_write_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf->data, |
26a16181 | 1097 | get_param(params, 0)->val_ull); |
36e067b2 | 1098 | gdb_put_packet("OK"); |
62b3320b JD |
1099 | } |
1100 | ||
26a16181 | 1101 | static void handle_get_reg(GArray *params, void *user_ctx) |
5d0e57bd JD |
1102 | { |
1103 | int reg_size; | |
1104 | ||
d0e5fa84 | 1105 | if (!gdb_get_cpu_process(gdbserver_state.g_cpu)->target_xml) { |
36e067b2 | 1106 | gdb_put_packet(""); |
5d0e57bd JD |
1107 | return; |
1108 | } | |
1109 | ||
26a16181 | 1110 | if (!params->len) { |
36e067b2 | 1111 | gdb_put_packet("E14"); |
5d0e57bd JD |
1112 | return; |
1113 | } | |
1114 | ||
4a25f1b9 | 1115 | reg_size = gdb_read_register(gdbserver_state.g_cpu, |
a010bdbe | 1116 | gdbserver_state.mem_buf, |
26a16181 | 1117 | get_param(params, 0)->val_ull); |
5d0e57bd | 1118 | if (!reg_size) { |
36e067b2 | 1119 | gdb_put_packet("E14"); |
5d0e57bd | 1120 | return; |
4a25f1b9 AB |
1121 | } else { |
1122 | g_byte_array_set_size(gdbserver_state.mem_buf, reg_size); | |
5d0e57bd JD |
1123 | } |
1124 | ||
36e067b2 AB |
1125 | gdb_memtohex(gdbserver_state.str_buf, |
1126 | gdbserver_state.mem_buf->data, reg_size); | |
1127 | gdb_put_strbuf(); | |
5d0e57bd JD |
1128 | } |
1129 | ||
26a16181 | 1130 | static void handle_write_mem(GArray *params, void *user_ctx) |
cc0ecc78 | 1131 | { |
26a16181 | 1132 | if (params->len != 3) { |
36e067b2 | 1133 | gdb_put_packet("E22"); |
cc0ecc78 JD |
1134 | return; |
1135 | } | |
1136 | ||
36e067b2 | 1137 | /* gdb_hextomem() reads 2*len bytes */ |
26a16181 AB |
1138 | if (get_param(params, 1)->val_ull > |
1139 | strlen(get_param(params, 2)->data) / 2) { | |
36e067b2 | 1140 | gdb_put_packet("E22"); |
cc0ecc78 JD |
1141 | return; |
1142 | } | |
1143 | ||
36e067b2 | 1144 | gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 2)->data, |
589a5867 AB |
1145 | get_param(params, 1)->val_ull); |
1146 | if (gdb_target_memory_rw_debug(gdbserver_state.g_cpu, | |
1147 | get_param(params, 0)->val_ull, | |
1148 | gdbserver_state.mem_buf->data, | |
1149 | gdbserver_state.mem_buf->len, true)) { | |
36e067b2 | 1150 | gdb_put_packet("E14"); |
cc0ecc78 JD |
1151 | return; |
1152 | } | |
1153 | ||
36e067b2 | 1154 | gdb_put_packet("OK"); |
cc0ecc78 JD |
1155 | } |
1156 | ||
26a16181 | 1157 | static void handle_read_mem(GArray *params, void *user_ctx) |
da92e236 | 1158 | { |
26a16181 | 1159 | if (params->len != 2) { |
36e067b2 | 1160 | gdb_put_packet("E22"); |
da92e236 JD |
1161 | return; |
1162 | } | |
1163 | ||
36e067b2 | 1164 | /* gdb_memtohex() doubles the required space */ |
26a16181 | 1165 | if (get_param(params, 1)->val_ull > MAX_PACKET_LENGTH / 2) { |
36e067b2 | 1166 | gdb_put_packet("E22"); |
da92e236 JD |
1167 | return; |
1168 | } | |
1169 | ||
26a16181 AB |
1170 | g_byte_array_set_size(gdbserver_state.mem_buf, |
1171 | get_param(params, 1)->val_ull); | |
4a25f1b9 | 1172 | |
589a5867 AB |
1173 | if (gdb_target_memory_rw_debug(gdbserver_state.g_cpu, |
1174 | get_param(params, 0)->val_ull, | |
1175 | gdbserver_state.mem_buf->data, | |
1176 | gdbserver_state.mem_buf->len, false)) { | |
36e067b2 | 1177 | gdb_put_packet("E14"); |
da92e236 JD |
1178 | return; |
1179 | } | |
1180 | ||
36e067b2 | 1181 | gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, |
4a25f1b9 | 1182 | gdbserver_state.mem_buf->len); |
36e067b2 | 1183 | gdb_put_strbuf(); |
da92e236 JD |
1184 | } |
1185 | ||
26a16181 | 1186 | static void handle_write_all_regs(GArray *params, void *user_ctx) |
287ca120 | 1187 | { |
379b42e8 AB |
1188 | int reg_id; |
1189 | size_t len; | |
287ca120 JD |
1190 | uint8_t *registers; |
1191 | int reg_size; | |
1192 | ||
26a16181 | 1193 | if (!params->len) { |
287ca120 JD |
1194 | return; |
1195 | } | |
1196 | ||
a346af3e | 1197 | cpu_synchronize_state(gdbserver_state.g_cpu); |
26a16181 | 1198 | len = strlen(get_param(params, 0)->data) / 2; |
36e067b2 | 1199 | gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len); |
4a25f1b9 | 1200 | registers = gdbserver_state.mem_buf->data; |
379b42e8 AB |
1201 | for (reg_id = 0; |
1202 | reg_id < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0; | |
1203 | reg_id++) { | |
1204 | reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, reg_id); | |
287ca120 JD |
1205 | len -= reg_size; |
1206 | registers += reg_size; | |
1207 | } | |
36e067b2 | 1208 | gdb_put_packet("OK"); |
287ca120 JD |
1209 | } |
1210 | ||
26a16181 | 1211 | static void handle_read_all_regs(GArray *params, void *user_ctx) |
397d1370 | 1212 | { |
379b42e8 AB |
1213 | int reg_id; |
1214 | size_t len; | |
397d1370 | 1215 | |
a346af3e | 1216 | cpu_synchronize_state(gdbserver_state.g_cpu); |
a010bdbe | 1217 | g_byte_array_set_size(gdbserver_state.mem_buf, 0); |
397d1370 | 1218 | len = 0; |
379b42e8 | 1219 | for (reg_id = 0; reg_id < gdbserver_state.g_cpu->gdb_num_g_regs; reg_id++) { |
4a25f1b9 | 1220 | len += gdb_read_register(gdbserver_state.g_cpu, |
a010bdbe | 1221 | gdbserver_state.mem_buf, |
379b42e8 | 1222 | reg_id); |
397d1370 | 1223 | } |
a010bdbe | 1224 | g_assert(len == gdbserver_state.mem_buf->len); |
397d1370 | 1225 | |
36e067b2 AB |
1226 | gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len); |
1227 | gdb_put_strbuf(); | |
397d1370 JD |
1228 | } |
1229 | ||
4b20fab1 | 1230 | |
26a16181 | 1231 | static void handle_step(GArray *params, void *user_ctx) |
933f80dd | 1232 | { |
26a16181 | 1233 | if (params->len) { |
b428ad12 | 1234 | gdb_set_cpu_pc(get_param(params, 0)->val_ull); |
933f80dd JD |
1235 | } |
1236 | ||
ecd39d62 | 1237 | cpu_single_step(gdbserver_state.c_cpu, gdbserver_state.sstep_flags); |
a346af3e | 1238 | gdb_continue(); |
933f80dd JD |
1239 | } |
1240 | ||
26a16181 | 1241 | static void handle_backward(GArray *params, void *user_ctx) |
fda8458b | 1242 | { |
505601d5 | 1243 | if (!gdb_can_reverse()) { |
36e067b2 | 1244 | gdb_put_packet("E22"); |
fda8458b | 1245 | } |
26a16181 AB |
1246 | if (params->len == 1) { |
1247 | switch (get_param(params, 0)->opcode) { | |
fda8458b PD |
1248 | case 's': |
1249 | if (replay_reverse_step()) { | |
1250 | gdb_continue(); | |
1251 | } else { | |
36e067b2 | 1252 | gdb_put_packet("E14"); |
fda8458b PD |
1253 | } |
1254 | return; | |
cda38259 PD |
1255 | case 'c': |
1256 | if (replay_reverse_continue()) { | |
1257 | gdb_continue(); | |
1258 | } else { | |
36e067b2 | 1259 | gdb_put_packet("E14"); |
cda38259 PD |
1260 | } |
1261 | return; | |
fda8458b PD |
1262 | } |
1263 | } | |
1264 | ||
1265 | /* Default invalid command */ | |
36e067b2 | 1266 | gdb_put_packet(""); |
fda8458b PD |
1267 | } |
1268 | ||
26a16181 | 1269 | static void handle_v_cont_query(GArray *params, void *user_ctx) |
8536ec02 | 1270 | { |
36e067b2 | 1271 | gdb_put_packet("vCont;c;C;s;S"); |
8536ec02 JD |
1272 | } |
1273 | ||
26a16181 | 1274 | static void handle_v_cont(GArray *params, void *user_ctx) |
8536ec02 JD |
1275 | { |
1276 | int res; | |
1277 | ||
26a16181 | 1278 | if (!params->len) { |
8536ec02 JD |
1279 | return; |
1280 | } | |
1281 | ||
26a16181 | 1282 | res = gdb_handle_vcont(get_param(params, 0)->data); |
8536ec02 | 1283 | if ((res == -EINVAL) || (res == -ERANGE)) { |
36e067b2 | 1284 | gdb_put_packet("E22"); |
8536ec02 | 1285 | } else if (res) { |
36e067b2 | 1286 | gdb_put_packet(""); |
8536ec02 JD |
1287 | } |
1288 | } | |
1289 | ||
26a16181 | 1290 | static void handle_v_attach(GArray *params, void *user_ctx) |
8536ec02 JD |
1291 | { |
1292 | GDBProcess *process; | |
1293 | CPUState *cpu; | |
8536ec02 | 1294 | |
308f9e88 | 1295 | g_string_assign(gdbserver_state.str_buf, "E22"); |
26a16181 | 1296 | if (!params->len) { |
8536ec02 JD |
1297 | goto cleanup; |
1298 | } | |
1299 | ||
26a16181 | 1300 | process = gdb_get_process(get_param(params, 0)->val_ul); |
8536ec02 JD |
1301 | if (!process) { |
1302 | goto cleanup; | |
1303 | } | |
1304 | ||
a3fcc111 | 1305 | cpu = gdb_get_first_cpu_in_process(process); |
8536ec02 JD |
1306 | if (!cpu) { |
1307 | goto cleanup; | |
1308 | } | |
1309 | ||
1310 | process->attached = true; | |
a346af3e AB |
1311 | gdbserver_state.g_cpu = cpu; |
1312 | gdbserver_state.c_cpu = cpu; | |
8536ec02 | 1313 | |
75837005 MTB |
1314 | if (gdbserver_state.allow_stop_reply) { |
1315 | g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP); | |
1316 | gdb_append_thread_id(cpu, gdbserver_state.str_buf); | |
1317 | g_string_append_c(gdbserver_state.str_buf, ';'); | |
1318 | gdbserver_state.allow_stop_reply = false; | |
8536ec02 | 1319 | cleanup: |
75837005 MTB |
1320 | gdb_put_strbuf(); |
1321 | } | |
8536ec02 JD |
1322 | } |
1323 | ||
26a16181 | 1324 | static void handle_v_kill(GArray *params, void *user_ctx) |
8536ec02 JD |
1325 | { |
1326 | /* Kill the target */ | |
36e067b2 | 1327 | gdb_put_packet("OK"); |
8536ec02 | 1328 | error_report("QEMU: Terminated via GDBstub"); |
b9e10c6c | 1329 | gdb_exit(0); |
8536ec02 JD |
1330 | exit(0); |
1331 | } | |
1332 | ||
305bea06 | 1333 | static const GdbCmdParseEntry gdb_v_commands_table[] = { |
8536ec02 JD |
1334 | /* Order is important if has same prefix */ |
1335 | { | |
1336 | .handler = handle_v_cont_query, | |
1337 | .cmd = "Cont?", | |
1338 | .cmd_startswith = 1 | |
1339 | }, | |
1340 | { | |
1341 | .handler = handle_v_cont, | |
1342 | .cmd = "Cont", | |
1343 | .cmd_startswith = 1, | |
75837005 | 1344 | .allow_stop_reply = true, |
8536ec02 JD |
1345 | .schema = "s0" |
1346 | }, | |
1347 | { | |
1348 | .handler = handle_v_attach, | |
1349 | .cmd = "Attach;", | |
1350 | .cmd_startswith = 1, | |
75837005 | 1351 | .allow_stop_reply = true, |
8536ec02 JD |
1352 | .schema = "l0" |
1353 | }, | |
1354 | { | |
1355 | .handler = handle_v_kill, | |
1356 | .cmd = "Kill;", | |
1357 | .cmd_startswith = 1 | |
1358 | }, | |
e282010b IL |
1359 | #ifdef CONFIG_USER_ONLY |
1360 | /* | |
1361 | * Host I/O Packets. See [1] for details. | |
1362 | * [1] https://sourceware.org/gdb/onlinedocs/gdb/Host-I_002fO-Packets.html | |
1363 | */ | |
1364 | { | |
1365 | .handler = gdb_handle_v_file_open, | |
1366 | .cmd = "File:open:", | |
1367 | .cmd_startswith = 1, | |
1368 | .schema = "s,L,L0" | |
1369 | }, | |
1370 | { | |
1371 | .handler = gdb_handle_v_file_close, | |
1372 | .cmd = "File:close:", | |
1373 | .cmd_startswith = 1, | |
1374 | .schema = "l0" | |
1375 | }, | |
1376 | { | |
1377 | .handler = gdb_handle_v_file_pread, | |
1378 | .cmd = "File:pread:", | |
1379 | .cmd_startswith = 1, | |
1380 | .schema = "l,L,L0" | |
1381 | }, | |
1382 | { | |
1383 | .handler = gdb_handle_v_file_readlink, | |
1384 | .cmd = "File:readlink:", | |
1385 | .cmd_startswith = 1, | |
1386 | .schema = "s0" | |
1387 | }, | |
1388 | #endif | |
8536ec02 JD |
1389 | }; |
1390 | ||
26a16181 | 1391 | static void handle_v_commands(GArray *params, void *user_ctx) |
8536ec02 | 1392 | { |
26a16181 | 1393 | if (!params->len) { |
8536ec02 JD |
1394 | return; |
1395 | } | |
1396 | ||
5b030993 | 1397 | if (process_string_cmd(get_param(params, 0)->data, |
8536ec02 JD |
1398 | gdb_v_commands_table, |
1399 | ARRAY_SIZE(gdb_v_commands_table))) { | |
36e067b2 | 1400 | gdb_put_packet(""); |
8536ec02 JD |
1401 | } |
1402 | } | |
1403 | ||
26a16181 | 1404 | static void handle_query_qemu_sstepbits(GArray *params, void *user_ctx) |
2704efad | 1405 | { |
ecd39d62 ML |
1406 | g_string_printf(gdbserver_state.str_buf, "ENABLE=%x", SSTEP_ENABLE); |
1407 | ||
1408 | if (gdbserver_state.supported_sstep_flags & SSTEP_NOIRQ) { | |
1409 | g_string_append_printf(gdbserver_state.str_buf, ",NOIRQ=%x", | |
1410 | SSTEP_NOIRQ); | |
1411 | } | |
1412 | ||
1413 | if (gdbserver_state.supported_sstep_flags & SSTEP_NOTIMER) { | |
1414 | g_string_append_printf(gdbserver_state.str_buf, ",NOTIMER=%x", | |
1415 | SSTEP_NOTIMER); | |
1416 | } | |
1417 | ||
36e067b2 | 1418 | gdb_put_strbuf(); |
2704efad JD |
1419 | } |
1420 | ||
26a16181 | 1421 | static void handle_set_qemu_sstep(GArray *params, void *user_ctx) |
2704efad | 1422 | { |
ecd39d62 ML |
1423 | int new_sstep_flags; |
1424 | ||
26a16181 | 1425 | if (!params->len) { |
2704efad JD |
1426 | return; |
1427 | } | |
1428 | ||
ecd39d62 ML |
1429 | new_sstep_flags = get_param(params, 0)->val_ul; |
1430 | ||
1431 | if (new_sstep_flags & ~gdbserver_state.supported_sstep_flags) { | |
36e067b2 | 1432 | gdb_put_packet("E22"); |
ecd39d62 ML |
1433 | return; |
1434 | } | |
1435 | ||
1436 | gdbserver_state.sstep_flags = new_sstep_flags; | |
36e067b2 | 1437 | gdb_put_packet("OK"); |
2704efad JD |
1438 | } |
1439 | ||
26a16181 | 1440 | static void handle_query_qemu_sstep(GArray *params, void *user_ctx) |
2704efad | 1441 | { |
ecd39d62 ML |
1442 | g_string_printf(gdbserver_state.str_buf, "0x%x", |
1443 | gdbserver_state.sstep_flags); | |
36e067b2 | 1444 | gdb_put_strbuf(); |
2704efad JD |
1445 | } |
1446 | ||
26a16181 | 1447 | static void handle_query_curr_tid(GArray *params, void *user_ctx) |
b4608c04 | 1448 | { |
2e0f2cfb | 1449 | CPUState *cpu; |
2704efad | 1450 | GDBProcess *process; |
2704efad JD |
1451 | |
1452 | /* | |
1453 | * "Current thread" remains vague in the spec, so always return | |
1454 | * the first thread of the current process (gdb returns the | |
1455 | * first thread). | |
1456 | */ | |
a346af3e | 1457 | process = gdb_get_cpu_process(gdbserver_state.g_cpu); |
a3fcc111 | 1458 | cpu = gdb_get_first_cpu_in_process(process); |
308f9e88 AB |
1459 | g_string_assign(gdbserver_state.str_buf, "QC"); |
1460 | gdb_append_thread_id(cpu, gdbserver_state.str_buf); | |
36e067b2 | 1461 | gdb_put_strbuf(); |
2704efad JD |
1462 | } |
1463 | ||
26a16181 | 1464 | static void handle_query_threads(GArray *params, void *user_ctx) |
2704efad | 1465 | { |
a346af3e | 1466 | if (!gdbserver_state.query_cpu) { |
36e067b2 | 1467 | gdb_put_packet("l"); |
2704efad JD |
1468 | return; |
1469 | } | |
1470 | ||
308f9e88 AB |
1471 | g_string_assign(gdbserver_state.str_buf, "m"); |
1472 | gdb_append_thread_id(gdbserver_state.query_cpu, gdbserver_state.str_buf); | |
36e067b2 | 1473 | gdb_put_strbuf(); |
a346af3e | 1474 | gdbserver_state.query_cpu = gdb_next_attached_cpu(gdbserver_state.query_cpu); |
2704efad JD |
1475 | } |
1476 | ||
26a16181 | 1477 | static void handle_query_first_threads(GArray *params, void *user_ctx) |
2704efad | 1478 | { |
a346af3e | 1479 | gdbserver_state.query_cpu = gdb_first_attached_cpu(); |
26a16181 | 1480 | handle_query_threads(params, user_ctx); |
2704efad JD |
1481 | } |
1482 | ||
26a16181 | 1483 | static void handle_query_thread_extra(GArray *params, void *user_ctx) |
2704efad | 1484 | { |
308f9e88 | 1485 | g_autoptr(GString) rs = g_string_new(NULL); |
2704efad | 1486 | CPUState *cpu; |
2704efad | 1487 | |
26a16181 AB |
1488 | if (!params->len || |
1489 | get_param(params, 0)->thread_id.kind == GDB_READ_THREAD_ERR) { | |
36e067b2 | 1490 | gdb_put_packet("E22"); |
2704efad JD |
1491 | return; |
1492 | } | |
1493 | ||
26a16181 AB |
1494 | cpu = gdb_get_cpu(get_param(params, 0)->thread_id.pid, |
1495 | get_param(params, 0)->thread_id.tid); | |
2704efad JD |
1496 | if (!cpu) { |
1497 | return; | |
1498 | } | |
1499 | ||
1500 | cpu_synchronize_state(cpu); | |
1501 | ||
a346af3e | 1502 | if (gdbserver_state.multiprocess && (gdbserver_state.process_num > 1)) { |
2704efad JD |
1503 | /* Print the CPU model and name in multiprocess mode */ |
1504 | ObjectClass *oc = object_get_class(OBJECT(cpu)); | |
1505 | const char *cpu_model = object_class_get_name(oc); | |
7a309cc9 | 1506 | const char *cpu_name = |
076b2fad | 1507 | object_get_canonical_path_component(OBJECT(cpu)); |
308f9e88 AB |
1508 | g_string_printf(rs, "%s %s [%s]", cpu_model, cpu_name, |
1509 | cpu->halted ? "halted " : "running"); | |
2704efad | 1510 | } else { |
308f9e88 | 1511 | g_string_printf(rs, "CPU#%d [%s]", cpu->cpu_index, |
2704efad JD |
1512 | cpu->halted ? "halted " : "running"); |
1513 | } | |
308f9e88 | 1514 | trace_gdbstub_op_extra_info(rs->str); |
36e067b2 AB |
1515 | gdb_memtohex(gdbserver_state.str_buf, (uint8_t *)rs->str, rs->len); |
1516 | gdb_put_strbuf(); | |
2704efad JD |
1517 | } |
1518 | ||
26a16181 | 1519 | static void handle_query_supported(GArray *params, void *user_ctx) |
2704efad JD |
1520 | { |
1521 | CPUClass *cc; | |
1522 | ||
308f9e88 | 1523 | g_string_printf(gdbserver_state.str_buf, "PacketSize=%x", MAX_PACKET_LENGTH); |
2704efad JD |
1524 | cc = CPU_GET_CLASS(first_cpu); |
1525 | if (cc->gdb_core_xml_file) { | |
308f9e88 | 1526 | g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+"); |
2704efad JD |
1527 | } |
1528 | ||
505601d5 | 1529 | if (gdb_can_reverse()) { |
cda38259 PD |
1530 | g_string_append(gdbserver_state.str_buf, |
1531 | ";ReverseStep+;ReverseContinue+"); | |
fda8458b PD |
1532 | } |
1533 | ||
e282010b IL |
1534 | #if defined(CONFIG_USER_ONLY) |
1535 | #if defined(CONFIG_LINUX) | |
51c623b0 LY |
1536 | if (gdbserver_state.c_cpu->opaque) { |
1537 | g_string_append(gdbserver_state.str_buf, ";qXfer:auxv:read+"); | |
1538 | } | |
1539 | #endif | |
e282010b IL |
1540 | g_string_append(gdbserver_state.str_buf, ";qXfer:exec-file:read+"); |
1541 | #endif | |
51c623b0 | 1542 | |
26a16181 AB |
1543 | if (params->len && |
1544 | strstr(get_param(params, 0)->data, "multiprocess+")) { | |
a346af3e | 1545 | gdbserver_state.multiprocess = true; |
2704efad JD |
1546 | } |
1547 | ||
3bc2609d | 1548 | g_string_append(gdbserver_state.str_buf, ";vContSupported+;multiprocess+"); |
36e067b2 | 1549 | gdb_put_strbuf(); |
2704efad JD |
1550 | } |
1551 | ||
26a16181 | 1552 | static void handle_query_xfer_features(GArray *params, void *user_ctx) |
2704efad | 1553 | { |
c145eeae | 1554 | GDBProcess *process; |
5b24c641 | 1555 | CPUClass *cc; |
2704efad JD |
1556 | unsigned long len, total_len, addr; |
1557 | const char *xml; | |
b4608c04 | 1558 | const char *p; |
2704efad | 1559 | |
26a16181 | 1560 | if (params->len < 3) { |
36e067b2 | 1561 | gdb_put_packet("E22"); |
2704efad JD |
1562 | return; |
1563 | } | |
1564 | ||
a346af3e AB |
1565 | process = gdb_get_cpu_process(gdbserver_state.g_cpu); |
1566 | cc = CPU_GET_CLASS(gdbserver_state.g_cpu); | |
2704efad | 1567 | if (!cc->gdb_core_xml_file) { |
36e067b2 | 1568 | gdb_put_packet(""); |
2704efad JD |
1569 | return; |
1570 | } | |
1571 | ||
26a16181 | 1572 | p = get_param(params, 0)->data; |
a346af3e | 1573 | xml = get_feature_xml(p, &p, process); |
2704efad | 1574 | if (!xml) { |
36e067b2 | 1575 | gdb_put_packet("E00"); |
2704efad JD |
1576 | return; |
1577 | } | |
1578 | ||
26a16181 AB |
1579 | addr = get_param(params, 1)->val_ul; |
1580 | len = get_param(params, 2)->val_ul; | |
2704efad JD |
1581 | total_len = strlen(xml); |
1582 | if (addr > total_len) { | |
36e067b2 | 1583 | gdb_put_packet("E00"); |
2704efad JD |
1584 | return; |
1585 | } | |
1586 | ||
1587 | if (len > (MAX_PACKET_LENGTH - 5) / 2) { | |
1588 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
1589 | } | |
1590 | ||
1591 | if (len < total_len - addr) { | |
308f9e88 | 1592 | g_string_assign(gdbserver_state.str_buf, "m"); |
36e067b2 | 1593 | gdb_memtox(gdbserver_state.str_buf, xml + addr, len); |
2704efad | 1594 | } else { |
308f9e88 | 1595 | g_string_assign(gdbserver_state.str_buf, "l"); |
36e067b2 | 1596 | gdb_memtox(gdbserver_state.str_buf, xml + addr, total_len - addr); |
2704efad JD |
1597 | } |
1598 | ||
36e067b2 | 1599 | gdb_put_packet_binary(gdbserver_state.str_buf->str, |
308f9e88 | 1600 | gdbserver_state.str_buf->len, true); |
2704efad JD |
1601 | } |
1602 | ||
26a16181 | 1603 | static void handle_query_qemu_supported(GArray *params, void *user_ctx) |
2704efad | 1604 | { |
308f9e88 | 1605 | g_string_printf(gdbserver_state.str_buf, "sstepbits;sstep"); |
ab4752ec | 1606 | #ifndef CONFIG_USER_ONLY |
308f9e88 | 1607 | g_string_append(gdbserver_state.str_buf, ";PhyMemMode"); |
ab4752ec | 1608 | #endif |
36e067b2 | 1609 | gdb_put_strbuf(); |
ab4752ec JD |
1610 | } |
1611 | ||
305bea06 | 1612 | static const GdbCmdParseEntry gdb_gen_query_set_common_table[] = { |
2704efad JD |
1613 | /* Order is important if has same prefix */ |
1614 | { | |
1615 | .handler = handle_query_qemu_sstepbits, | |
1616 | .cmd = "qemu.sstepbits", | |
1617 | }, | |
1618 | { | |
1619 | .handler = handle_query_qemu_sstep, | |
1620 | .cmd = "qemu.sstep", | |
1621 | }, | |
1622 | { | |
1623 | .handler = handle_set_qemu_sstep, | |
1624 | .cmd = "qemu.sstep=", | |
1625 | .cmd_startswith = 1, | |
1626 | .schema = "l0" | |
1627 | }, | |
1628 | }; | |
1629 | ||
305bea06 | 1630 | static const GdbCmdParseEntry gdb_gen_query_table[] = { |
2704efad JD |
1631 | { |
1632 | .handler = handle_query_curr_tid, | |
1633 | .cmd = "C", | |
1634 | }, | |
1635 | { | |
1636 | .handler = handle_query_threads, | |
1637 | .cmd = "sThreadInfo", | |
1638 | }, | |
1639 | { | |
1640 | .handler = handle_query_first_threads, | |
1641 | .cmd = "fThreadInfo", | |
1642 | }, | |
1643 | { | |
1644 | .handler = handle_query_thread_extra, | |
1645 | .cmd = "ThreadExtraInfo,", | |
1646 | .cmd_startswith = 1, | |
1647 | .schema = "t0" | |
1648 | }, | |
1649 | #ifdef CONFIG_USER_ONLY | |
1650 | { | |
d96bf49b | 1651 | .handler = gdb_handle_query_offsets, |
2704efad JD |
1652 | .cmd = "Offsets", |
1653 | }, | |
1654 | #else | |
1655 | { | |
b6fa2ec2 | 1656 | .handler = gdb_handle_query_rcmd, |
2704efad JD |
1657 | .cmd = "Rcmd,", |
1658 | .cmd_startswith = 1, | |
1659 | .schema = "s0" | |
1660 | }, | |
1661 | #endif | |
1662 | { | |
1663 | .handler = handle_query_supported, | |
1664 | .cmd = "Supported:", | |
1665 | .cmd_startswith = 1, | |
1666 | .schema = "s0" | |
1667 | }, | |
1668 | { | |
1669 | .handler = handle_query_supported, | |
1670 | .cmd = "Supported", | |
1671 | .schema = "s0" | |
1672 | }, | |
1673 | { | |
1674 | .handler = handle_query_xfer_features, | |
1675 | .cmd = "Xfer:features:read:", | |
1676 | .cmd_startswith = 1, | |
1677 | .schema = "s:l,l0" | |
1678 | }, | |
e282010b IL |
1679 | #if defined(CONFIG_USER_ONLY) |
1680 | #if defined(CONFIG_LINUX) | |
51c623b0 | 1681 | { |
d96bf49b | 1682 | .handler = gdb_handle_query_xfer_auxv, |
51c623b0 LY |
1683 | .cmd = "Xfer:auxv:read::", |
1684 | .cmd_startswith = 1, | |
1685 | .schema = "l,l0" | |
1686 | }, | |
e282010b IL |
1687 | #endif |
1688 | { | |
1689 | .handler = gdb_handle_query_xfer_exec_file, | |
1690 | .cmd = "Xfer:exec-file:read:", | |
1691 | .cmd_startswith = 1, | |
1692 | .schema = "l:l,l0" | |
1693 | }, | |
51c623b0 | 1694 | #endif |
2704efad | 1695 | { |
8a2025b3 | 1696 | .handler = gdb_handle_query_attached, |
2704efad JD |
1697 | .cmd = "Attached:", |
1698 | .cmd_startswith = 1 | |
1699 | }, | |
1700 | { | |
8a2025b3 | 1701 | .handler = gdb_handle_query_attached, |
2704efad JD |
1702 | .cmd = "Attached", |
1703 | }, | |
1704 | { | |
1705 | .handler = handle_query_qemu_supported, | |
1706 | .cmd = "qemu.Supported", | |
1707 | }, | |
ab4752ec JD |
1708 | #ifndef CONFIG_USER_ONLY |
1709 | { | |
589a5867 | 1710 | .handler = gdb_handle_query_qemu_phy_mem_mode, |
ab4752ec JD |
1711 | .cmd = "qemu.PhyMemMode", |
1712 | }, | |
1713 | #endif | |
2704efad JD |
1714 | }; |
1715 | ||
305bea06 | 1716 | static const GdbCmdParseEntry gdb_gen_set_table[] = { |
2704efad JD |
1717 | /* Order is important if has same prefix */ |
1718 | { | |
1719 | .handler = handle_set_qemu_sstep, | |
1720 | .cmd = "qemu.sstep:", | |
1721 | .cmd_startswith = 1, | |
1722 | .schema = "l0" | |
1723 | }, | |
ab4752ec JD |
1724 | #ifndef CONFIG_USER_ONLY |
1725 | { | |
589a5867 | 1726 | .handler = gdb_handle_set_qemu_phy_mem_mode, |
ab4752ec JD |
1727 | .cmd = "qemu.PhyMemMode:", |
1728 | .cmd_startswith = 1, | |
1729 | .schema = "l0" | |
1730 | }, | |
1731 | #endif | |
2704efad JD |
1732 | }; |
1733 | ||
26a16181 | 1734 | static void handle_gen_query(GArray *params, void *user_ctx) |
2704efad | 1735 | { |
26a16181 | 1736 | if (!params->len) { |
2704efad JD |
1737 | return; |
1738 | } | |
1739 | ||
5b030993 | 1740 | if (!process_string_cmd(get_param(params, 0)->data, |
2704efad JD |
1741 | gdb_gen_query_set_common_table, |
1742 | ARRAY_SIZE(gdb_gen_query_set_common_table))) { | |
1743 | return; | |
1744 | } | |
1745 | ||
5b030993 | 1746 | if (process_string_cmd(get_param(params, 0)->data, |
2704efad JD |
1747 | gdb_gen_query_table, |
1748 | ARRAY_SIZE(gdb_gen_query_table))) { | |
36e067b2 | 1749 | gdb_put_packet(""); |
2704efad JD |
1750 | } |
1751 | } | |
1752 | ||
26a16181 | 1753 | static void handle_gen_set(GArray *params, void *user_ctx) |
2704efad | 1754 | { |
26a16181 | 1755 | if (!params->len) { |
2704efad JD |
1756 | return; |
1757 | } | |
1758 | ||
5b030993 | 1759 | if (!process_string_cmd(get_param(params, 0)->data, |
2704efad JD |
1760 | gdb_gen_query_set_common_table, |
1761 | ARRAY_SIZE(gdb_gen_query_set_common_table))) { | |
1762 | return; | |
1763 | } | |
1764 | ||
5b030993 | 1765 | if (process_string_cmd(get_param(params, 0)->data, |
2704efad JD |
1766 | gdb_gen_set_table, |
1767 | ARRAY_SIZE(gdb_gen_set_table))) { | |
36e067b2 | 1768 | gdb_put_packet(""); |
2704efad JD |
1769 | } |
1770 | } | |
1771 | ||
26a16181 | 1772 | static void handle_target_halt(GArray *params, void *user_ctx) |
7009d579 | 1773 | { |
75837005 MTB |
1774 | if (gdbserver_state.allow_stop_reply) { |
1775 | g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP); | |
1776 | gdb_append_thread_id(gdbserver_state.c_cpu, gdbserver_state.str_buf); | |
1777 | g_string_append_c(gdbserver_state.str_buf, ';'); | |
1778 | gdb_put_strbuf(); | |
1779 | gdbserver_state.allow_stop_reply = false; | |
1780 | } | |
7009d579 JD |
1781 | /* |
1782 | * Remove all the breakpoints when this query is issued, | |
1783 | * because gdb is doing an initial connect and the state | |
1784 | * should be cleaned up. | |
1785 | */ | |
ae7467b1 | 1786 | gdb_breakpoint_remove_all(gdbserver_state.c_cpu); |
7009d579 JD |
1787 | } |
1788 | ||
a346af3e | 1789 | static int gdb_handle_packet(const char *line_buf) |
2704efad | 1790 | { |
3e2c1261 | 1791 | const GdbCmdParseEntry *cmd_parser = NULL; |
3b46e624 | 1792 | |
5c9522b3 | 1793 | trace_gdbstub_io_command(line_buf); |
118e2268 | 1794 | |
3f1cbac7 | 1795 | switch (line_buf[0]) { |
53fd6554 | 1796 | case '!': |
36e067b2 | 1797 | gdb_put_packet("OK"); |
53fd6554 | 1798 | break; |
858693c6 | 1799 | case '?': |
7009d579 JD |
1800 | { |
1801 | static const GdbCmdParseEntry target_halted_cmd_desc = { | |
1802 | .handler = handle_target_halt, | |
1803 | .cmd = "?", | |
75837005 MTB |
1804 | .cmd_startswith = 1, |
1805 | .allow_stop_reply = true, | |
7009d579 JD |
1806 | }; |
1807 | cmd_parser = &target_halted_cmd_desc; | |
1808 | } | |
858693c6 FB |
1809 | break; |
1810 | case 'c': | |
4d6e3fe2 JD |
1811 | { |
1812 | static const GdbCmdParseEntry continue_cmd_desc = { | |
1813 | .handler = handle_continue, | |
1814 | .cmd = "c", | |
1815 | .cmd_startswith = 1, | |
75837005 | 1816 | .allow_stop_reply = true, |
4d6e3fe2 JD |
1817 | .schema = "L0" |
1818 | }; | |
1819 | cmd_parser = &continue_cmd_desc; | |
858693c6 | 1820 | } |
4d6e3fe2 | 1821 | break; |
1f487ee9 | 1822 | case 'C': |
ccc47d5d JD |
1823 | { |
1824 | static const GdbCmdParseEntry cont_with_sig_cmd_desc = { | |
1825 | .handler = handle_cont_with_sig, | |
1826 | .cmd = "C", | |
1827 | .cmd_startswith = 1, | |
75837005 | 1828 | .allow_stop_reply = true, |
ccc47d5d JD |
1829 | .schema = "l0" |
1830 | }; | |
1831 | cmd_parser = &cont_with_sig_cmd_desc; | |
1832 | } | |
1833 | break; | |
dd32aa10 | 1834 | case 'v': |
8536ec02 JD |
1835 | { |
1836 | static const GdbCmdParseEntry v_cmd_desc = { | |
1837 | .handler = handle_v_commands, | |
1838 | .cmd = "v", | |
1839 | .cmd_startswith = 1, | |
1840 | .schema = "s0" | |
1841 | }; | |
1842 | cmd_parser = &v_cmd_desc; | |
dd32aa10 | 1843 | } |
8536ec02 | 1844 | break; |
7d03f82f EI |
1845 | case 'k': |
1846 | /* Kill the target */ | |
7ae6c571 | 1847 | error_report("QEMU: Terminated via GDBstub"); |
b9e10c6c | 1848 | gdb_exit(0); |
7d03f82f EI |
1849 | exit(0); |
1850 | case 'D': | |
3e2c1261 JD |
1851 | { |
1852 | static const GdbCmdParseEntry detach_cmd_desc = { | |
1853 | .handler = handle_detach, | |
1854 | .cmd = "D", | |
1855 | .cmd_startswith = 1, | |
1856 | .schema = "?.l0" | |
1857 | }; | |
1858 | cmd_parser = &detach_cmd_desc; | |
546f3c67 | 1859 | } |
7d03f82f | 1860 | break; |
858693c6 | 1861 | case 's': |
933f80dd JD |
1862 | { |
1863 | static const GdbCmdParseEntry step_cmd_desc = { | |
1864 | .handler = handle_step, | |
1865 | .cmd = "s", | |
1866 | .cmd_startswith = 1, | |
75837005 | 1867 | .allow_stop_reply = true, |
933f80dd JD |
1868 | .schema = "L0" |
1869 | }; | |
1870 | cmd_parser = &step_cmd_desc; | |
858693c6 | 1871 | } |
933f80dd | 1872 | break; |
fda8458b PD |
1873 | case 'b': |
1874 | { | |
1875 | static const GdbCmdParseEntry backward_cmd_desc = { | |
1876 | .handler = handle_backward, | |
1877 | .cmd = "b", | |
1878 | .cmd_startswith = 1, | |
3b72d681 | 1879 | .allow_stop_reply = true, |
fda8458b PD |
1880 | .schema = "o0" |
1881 | }; | |
1882 | cmd_parser = &backward_cmd_desc; | |
1883 | } | |
1884 | break; | |
a2d1ebaf PB |
1885 | case 'F': |
1886 | { | |
4b20fab1 | 1887 | static const GdbCmdParseEntry file_io_cmd_desc = { |
c566080c | 1888 | .handler = gdb_handle_file_io, |
4b20fab1 JD |
1889 | .cmd = "F", |
1890 | .cmd_startswith = 1, | |
1891 | .schema = "L,L,o0" | |
1892 | }; | |
1893 | cmd_parser = &file_io_cmd_desc; | |
a2d1ebaf PB |
1894 | } |
1895 | break; | |
858693c6 | 1896 | case 'g': |
397d1370 JD |
1897 | { |
1898 | static const GdbCmdParseEntry read_all_regs_cmd_desc = { | |
1899 | .handler = handle_read_all_regs, | |
1900 | .cmd = "g", | |
1901 | .cmd_startswith = 1 | |
1902 | }; | |
1903 | cmd_parser = &read_all_regs_cmd_desc; | |
56aebc89 | 1904 | } |
858693c6 FB |
1905 | break; |
1906 | case 'G': | |
287ca120 JD |
1907 | { |
1908 | static const GdbCmdParseEntry write_all_regs_cmd_desc = { | |
1909 | .handler = handle_write_all_regs, | |
1910 | .cmd = "G", | |
1911 | .cmd_startswith = 1, | |
1912 | .schema = "s0" | |
1913 | }; | |
1914 | cmd_parser = &write_all_regs_cmd_desc; | |
56aebc89 | 1915 | } |
858693c6 FB |
1916 | break; |
1917 | case 'm': | |
da92e236 JD |
1918 | { |
1919 | static const GdbCmdParseEntry read_mem_cmd_desc = { | |
1920 | .handler = handle_read_mem, | |
1921 | .cmd = "m", | |
1922 | .cmd_startswith = 1, | |
1923 | .schema = "L,L0" | |
1924 | }; | |
1925 | cmd_parser = &read_mem_cmd_desc; | |
6f970bd9 | 1926 | } |
858693c6 FB |
1927 | break; |
1928 | case 'M': | |
cc0ecc78 JD |
1929 | { |
1930 | static const GdbCmdParseEntry write_mem_cmd_desc = { | |
1931 | .handler = handle_write_mem, | |
1932 | .cmd = "M", | |
1933 | .cmd_startswith = 1, | |
1934 | .schema = "L,L:s0" | |
1935 | }; | |
1936 | cmd_parser = &write_mem_cmd_desc; | |
44520db1 | 1937 | } |
858693c6 | 1938 | break; |
56aebc89 | 1939 | case 'p': |
5d0e57bd JD |
1940 | { |
1941 | static const GdbCmdParseEntry get_reg_cmd_desc = { | |
1942 | .handler = handle_get_reg, | |
1943 | .cmd = "p", | |
1944 | .cmd_startswith = 1, | |
1945 | .schema = "L0" | |
1946 | }; | |
1947 | cmd_parser = &get_reg_cmd_desc; | |
56aebc89 PB |
1948 | } |
1949 | break; | |
1950 | case 'P': | |
62b3320b JD |
1951 | { |
1952 | static const GdbCmdParseEntry set_reg_cmd_desc = { | |
1953 | .handler = handle_set_reg, | |
1954 | .cmd = "P", | |
1955 | .cmd_startswith = 1, | |
1956 | .schema = "L?s0" | |
1957 | }; | |
1958 | cmd_parser = &set_reg_cmd_desc; | |
1959 | } | |
56aebc89 | 1960 | break; |
858693c6 | 1961 | case 'Z': |
77f6ce50 JD |
1962 | { |
1963 | static const GdbCmdParseEntry insert_bp_cmd_desc = { | |
1964 | .handler = handle_insert_bp, | |
1965 | .cmd = "Z", | |
1966 | .cmd_startswith = 1, | |
1967 | .schema = "l?L?L0" | |
1968 | }; | |
1969 | cmd_parser = &insert_bp_cmd_desc; | |
1970 | } | |
1971 | break; | |
858693c6 | 1972 | case 'z': |
77f6ce50 JD |
1973 | { |
1974 | static const GdbCmdParseEntry remove_bp_cmd_desc = { | |
1975 | .handler = handle_remove_bp, | |
1976 | .cmd = "z", | |
1977 | .cmd_startswith = 1, | |
1978 | .schema = "l?L?L0" | |
1979 | }; | |
1980 | cmd_parser = &remove_bp_cmd_desc; | |
1981 | } | |
858693c6 | 1982 | break; |
880a7578 | 1983 | case 'H': |
3a9651d6 JD |
1984 | { |
1985 | static const GdbCmdParseEntry set_thread_cmd_desc = { | |
1986 | .handler = handle_set_thread, | |
1987 | .cmd = "H", | |
1988 | .cmd_startswith = 1, | |
1989 | .schema = "o.t0" | |
1990 | }; | |
1991 | cmd_parser = &set_thread_cmd_desc; | |
880a7578 AL |
1992 | } |
1993 | break; | |
1994 | case 'T': | |
44ffded0 JD |
1995 | { |
1996 | static const GdbCmdParseEntry thread_alive_cmd_desc = { | |
1997 | .handler = handle_thread_alive, | |
1998 | .cmd = "T", | |
1999 | .cmd_startswith = 1, | |
2000 | .schema = "t0" | |
2001 | }; | |
2002 | cmd_parser = &thread_alive_cmd_desc; | |
1e9fa730 | 2003 | } |
880a7578 | 2004 | break; |
978efd6a | 2005 | case 'q': |
2704efad JD |
2006 | { |
2007 | static const GdbCmdParseEntry gen_query_cmd_desc = { | |
2008 | .handler = handle_gen_query, | |
2009 | .cmd = "q", | |
2010 | .cmd_startswith = 1, | |
2011 | .schema = "s0" | |
2012 | }; | |
2013 | cmd_parser = &gen_query_cmd_desc; | |
56aebc89 | 2014 | } |
2704efad JD |
2015 | break; |
2016 | case 'Q': | |
2017 | { | |
2018 | static const GdbCmdParseEntry gen_set_cmd_desc = { | |
2019 | .handler = handle_gen_set, | |
2020 | .cmd = "Q", | |
2021 | .cmd_startswith = 1, | |
2022 | .schema = "s0" | |
2023 | }; | |
2024 | cmd_parser = &gen_set_cmd_desc; | |
a3919386 | 2025 | } |
2704efad | 2026 | break; |
858693c6 | 2027 | default: |
858693c6 | 2028 | /* put empty packet */ |
36e067b2 | 2029 | gdb_put_packet(""); |
858693c6 FB |
2030 | break; |
2031 | } | |
3e2c1261 | 2032 | |
2bdec398 | 2033 | if (cmd_parser) { |
a346af3e | 2034 | run_cmd_parser(line_buf, cmd_parser); |
2bdec398 | 2035 | } |
3e2c1261 | 2036 | |
858693c6 FB |
2037 | return RS_IDLE; |
2038 | } | |
2039 | ||
64f6b346 | 2040 | void gdb_set_stop_cpu(CPUState *cpu) |
880a7578 | 2041 | { |
a346af3e | 2042 | GDBProcess *p = gdb_get_cpu_process(cpu); |
160d858d LM |
2043 | |
2044 | if (!p->attached) { | |
2045 | /* | |
2046 | * Having a stop CPU corresponding to a process that is not attached | |
2047 | * confuses GDB. So we ignore the request. | |
2048 | */ | |
2049 | return; | |
2050 | } | |
2051 | ||
8d98c445 AB |
2052 | gdbserver_state.c_cpu = cpu; |
2053 | gdbserver_state.g_cpu = cpu; | |
880a7578 AL |
2054 | } |
2055 | ||
36e067b2 | 2056 | void gdb_read_byte(uint8_t ch) |
858693c6 | 2057 | { |
60fe76f3 | 2058 | uint8_t reply; |
858693c6 | 2059 | |
75837005 | 2060 | gdbserver_state.allow_stop_reply = false; |
1fddef4b | 2061 | #ifndef CONFIG_USER_ONLY |
d116e813 | 2062 | if (gdbserver_state.last_packet->len) { |
4046d913 PB |
2063 | /* Waiting for a response to the last packet. If we see the start |
2064 | of a new command then abandon the previous response. */ | |
2065 | if (ch == '-') { | |
5c9522b3 | 2066 | trace_gdbstub_err_got_nack(); |
36e067b2 | 2067 | gdb_put_buffer(gdbserver_state.last_packet->data, |
d116e813 | 2068 | gdbserver_state.last_packet->len); |
118e2268 | 2069 | } else if (ch == '+') { |
5c9522b3 | 2070 | trace_gdbstub_io_got_ack(); |
118e2268 | 2071 | } else { |
33c846ef | 2072 | trace_gdbstub_io_got_unexpected(ch); |
4046d913 | 2073 | } |
118e2268 | 2074 | |
d116e813 DH |
2075 | if (ch == '+' || ch == '$') { |
2076 | g_byte_array_set_size(gdbserver_state.last_packet, 0); | |
2077 | } | |
4046d913 PB |
2078 | if (ch != '$') |
2079 | return; | |
2080 | } | |
1354869c | 2081 | if (runstate_is_running()) { |
108e8180 NP |
2082 | /* |
2083 | * When the CPU is running, we cannot do anything except stop | |
2084 | * it when receiving a char. This is expected on a Ctrl-C in the | |
2085 | * gdb client. Because we are in all-stop mode, gdb sends a | |
2086 | * 0x03 byte which is not a usual packet, so we handle it specially | |
2087 | * here, but it does expect a stop reply. | |
2088 | */ | |
2089 | if (ch != 0x03) { | |
3869eb7e AB |
2090 | trace_gdbstub_err_unexpected_runpkt(ch); |
2091 | } else { | |
2092 | gdbserver_state.allow_stop_reply = true; | |
108e8180 | 2093 | } |
0461d5a6 | 2094 | vm_stop(RUN_STATE_PAUSED); |
5fafdf24 | 2095 | } else |
1fddef4b | 2096 | #endif |
41625033 | 2097 | { |
a346af3e | 2098 | switch(gdbserver_state.state) { |
858693c6 FB |
2099 | case RS_IDLE: |
2100 | if (ch == '$') { | |
4bf43122 | 2101 | /* start of command packet */ |
a346af3e AB |
2102 | gdbserver_state.line_buf_index = 0; |
2103 | gdbserver_state.line_sum = 0; | |
2104 | gdbserver_state.state = RS_GETLINE; | |
f1b0f894 AB |
2105 | } else if (ch == '+') { |
2106 | /* | |
2107 | * do nothing, gdb may preemptively send out ACKs on | |
2108 | * initial connection | |
2109 | */ | |
4bf43122 | 2110 | } else { |
33c846ef | 2111 | trace_gdbstub_err_garbage(ch); |
c33a346e | 2112 | } |
b4608c04 | 2113 | break; |
858693c6 | 2114 | case RS_GETLINE: |
4bf43122 DG |
2115 | if (ch == '}') { |
2116 | /* start escape sequence */ | |
a346af3e AB |
2117 | gdbserver_state.state = RS_GETLINE_ESC; |
2118 | gdbserver_state.line_sum += ch; | |
4bf43122 DG |
2119 | } else if (ch == '*') { |
2120 | /* start run length encoding sequence */ | |
a346af3e AB |
2121 | gdbserver_state.state = RS_GETLINE_RLE; |
2122 | gdbserver_state.line_sum += ch; | |
4bf43122 DG |
2123 | } else if (ch == '#') { |
2124 | /* end of command, start of checksum*/ | |
a346af3e AB |
2125 | gdbserver_state.state = RS_CHKSUM1; |
2126 | } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) { | |
5c9522b3 | 2127 | trace_gdbstub_err_overrun(); |
a346af3e | 2128 | gdbserver_state.state = RS_IDLE; |
4bf43122 DG |
2129 | } else { |
2130 | /* unescaped command character */ | |
a346af3e AB |
2131 | gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch; |
2132 | gdbserver_state.line_sum += ch; | |
4bf43122 DG |
2133 | } |
2134 | break; | |
2135 | case RS_GETLINE_ESC: | |
858693c6 | 2136 | if (ch == '#') { |
4bf43122 | 2137 | /* unexpected end of command in escape sequence */ |
a346af3e AB |
2138 | gdbserver_state.state = RS_CHKSUM1; |
2139 | } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) { | |
4bf43122 | 2140 | /* command buffer overrun */ |
5c9522b3 | 2141 | trace_gdbstub_err_overrun(); |
a346af3e | 2142 | gdbserver_state.state = RS_IDLE; |
4c3a88a2 | 2143 | } else { |
4bf43122 | 2144 | /* parse escaped character and leave escape state */ |
a346af3e AB |
2145 | gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch ^ 0x20; |
2146 | gdbserver_state.line_sum += ch; | |
2147 | gdbserver_state.state = RS_GETLINE; | |
4bf43122 DG |
2148 | } |
2149 | break; | |
2150 | case RS_GETLINE_RLE: | |
046aba16 MA |
2151 | /* |
2152 | * Run-length encoding is explained in "Debugging with GDB / | |
2153 | * Appendix E GDB Remote Serial Protocol / Overview". | |
2154 | */ | |
2155 | if (ch < ' ' || ch == '#' || ch == '$' || ch > 126) { | |
4bf43122 | 2156 | /* invalid RLE count encoding */ |
33c846ef | 2157 | trace_gdbstub_err_invalid_repeat(ch); |
a346af3e | 2158 | gdbserver_state.state = RS_GETLINE; |
4bf43122 DG |
2159 | } else { |
2160 | /* decode repeat length */ | |
33c846ef | 2161 | int repeat = ch - ' ' + 3; |
a346af3e | 2162 | if (gdbserver_state.line_buf_index + repeat >= sizeof(gdbserver_state.line_buf) - 1) { |
4bf43122 | 2163 | /* that many repeats would overrun the command buffer */ |
5c9522b3 | 2164 | trace_gdbstub_err_overrun(); |
a346af3e AB |
2165 | gdbserver_state.state = RS_IDLE; |
2166 | } else if (gdbserver_state.line_buf_index < 1) { | |
4bf43122 | 2167 | /* got a repeat but we have nothing to repeat */ |
5c9522b3 | 2168 | trace_gdbstub_err_invalid_rle(); |
a346af3e | 2169 | gdbserver_state.state = RS_GETLINE; |
4bf43122 DG |
2170 | } else { |
2171 | /* repeat the last character */ | |
a346af3e AB |
2172 | memset(gdbserver_state.line_buf + gdbserver_state.line_buf_index, |
2173 | gdbserver_state.line_buf[gdbserver_state.line_buf_index - 1], repeat); | |
2174 | gdbserver_state.line_buf_index += repeat; | |
2175 | gdbserver_state.line_sum += ch; | |
2176 | gdbserver_state.state = RS_GETLINE; | |
4bf43122 | 2177 | } |
4c3a88a2 FB |
2178 | } |
2179 | break; | |
858693c6 | 2180 | case RS_CHKSUM1: |
4bf43122 DG |
2181 | /* get high hex digit of checksum */ |
2182 | if (!isxdigit(ch)) { | |
33c846ef | 2183 | trace_gdbstub_err_checksum_invalid(ch); |
a346af3e | 2184 | gdbserver_state.state = RS_GETLINE; |
4bf43122 DG |
2185 | break; |
2186 | } | |
a346af3e AB |
2187 | gdbserver_state.line_buf[gdbserver_state.line_buf_index] = '\0'; |
2188 | gdbserver_state.line_csum = fromhex(ch) << 4; | |
2189 | gdbserver_state.state = RS_CHKSUM2; | |
858693c6 FB |
2190 | break; |
2191 | case RS_CHKSUM2: | |
4bf43122 DG |
2192 | /* get low hex digit of checksum */ |
2193 | if (!isxdigit(ch)) { | |
33c846ef | 2194 | trace_gdbstub_err_checksum_invalid(ch); |
a346af3e | 2195 | gdbserver_state.state = RS_GETLINE; |
4bf43122 | 2196 | break; |
858693c6 | 2197 | } |
a346af3e | 2198 | gdbserver_state.line_csum |= fromhex(ch); |
4bf43122 | 2199 | |
a346af3e AB |
2200 | if (gdbserver_state.line_csum != (gdbserver_state.line_sum & 0xff)) { |
2201 | trace_gdbstub_err_checksum_incorrect(gdbserver_state.line_sum, gdbserver_state.line_csum); | |
4bf43122 | 2202 | /* send NAK reply */ |
60fe76f3 | 2203 | reply = '-'; |
36e067b2 | 2204 | gdb_put_buffer(&reply, 1); |
a346af3e | 2205 | gdbserver_state.state = RS_IDLE; |
4c3a88a2 | 2206 | } else { |
4bf43122 | 2207 | /* send ACK reply */ |
60fe76f3 | 2208 | reply = '+'; |
36e067b2 | 2209 | gdb_put_buffer(&reply, 1); |
a346af3e | 2210 | gdbserver_state.state = gdb_handle_packet(gdbserver_state.line_buf); |
4c3a88a2 FB |
2211 | } |
2212 | break; | |
a2d1ebaf PB |
2213 | default: |
2214 | abort(); | |
858693c6 FB |
2215 | } |
2216 | } | |
2217 | } | |
2218 | ||
8f468636 LM |
2219 | /* |
2220 | * Create the process that will contain all the "orphan" CPUs (that are not | |
2221 | * part of a CPU cluster). Note that if this process contains no CPUs, it won't | |
2222 | * be attachable and thus will be invisible to the user. | |
2223 | */ | |
36e067b2 | 2224 | void gdb_create_default_process(GDBState *s) |
8f468636 LM |
2225 | { |
2226 | GDBProcess *process; | |
dc14a7a6 | 2227 | int pid; |
8f468636 | 2228 | |
dc14a7a6 IL |
2229 | #ifdef CONFIG_USER_ONLY |
2230 | assert(gdbserver_state.process_num == 0); | |
2231 | pid = getpid(); | |
2232 | #else | |
a346af3e | 2233 | if (gdbserver_state.process_num) { |
dc14a7a6 IL |
2234 | pid = s->processes[s->process_num - 1].pid; |
2235 | } else { | |
2236 | pid = 0; | |
8f468636 | 2237 | } |
dc14a7a6 IL |
2238 | /* We need an available PID slot for this process */ |
2239 | assert(pid < UINT32_MAX); | |
2240 | pid++; | |
2241 | #endif | |
8f468636 LM |
2242 | |
2243 | s->processes = g_renew(GDBProcess, s->processes, ++s->process_num); | |
2244 | process = &s->processes[s->process_num - 1]; | |
dc14a7a6 | 2245 | process->pid = pid; |
8f468636 | 2246 | process->attached = false; |
56e534bd | 2247 | process->target_xml = NULL; |
8f468636 LM |
2248 | } |
2249 |