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rtos: fix uninitialised variable warning
[openocd.git] / src / rtos / rtos.c
blobcdd37608ed446156ca409fd61405b8427b170ab3
1 /***************************************************************************
2 * Copyright (C) 2011 by Broadcom Corporation *
3 * Evan Hunter - ehunter@broadcom.com *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
19 ***************************************************************************/
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include "rtos.h"
26 #include "target/target.h"
27 #include "helper/log.h"
28 #include "helper/binarybuffer.h"
29 #include "server/gdb_server.h"
30
31 /* RTOSs */
32 extern struct rtos_type FreeRTOS_rtos;
33 extern struct rtos_type ThreadX_rtos;
34 extern struct rtos_type eCos_rtos;
35 extern struct rtos_type Linux_os;
36 extern struct rtos_type ChibiOS_rtos;
37 extern struct rtos_type embKernel_rtos;
38
39 static struct rtos_type *rtos_types[] = {
40 &ThreadX_rtos,
41 &FreeRTOS_rtos,
42 &eCos_rtos,
43 &Linux_os,
44 &ChibiOS_rtos,
45 &embKernel_rtos,
46 NULL
47 };
48
49 int rtos_thread_packet(struct connection *connection, char *packet, int packet_size);
50
51 int rtos_smp_init(struct target *target)
52 {
53 if (target->rtos->type->smp_init)
54 return target->rtos->type->smp_init(target);
55 return ERROR_TARGET_INIT_FAILED;
56 }
57
58 static int os_alloc(struct target *target, struct rtos_type *ostype)
59 {
60 struct rtos *os = target->rtos = calloc(1, sizeof(struct rtos));
61
62 if (!os)
63 return JIM_ERR;
64
65 os->type = ostype;
66 os->current_threadid = -1;
67 os->current_thread = 0;
68 os->symbols = NULL;
69 os->target = target;
70
71 /* RTOS drivers can override the packet handler in _create(). */
72 os->gdb_thread_packet = rtos_thread_packet;
73
74 return JIM_OK;
75 }
76
77 static void os_free(struct target *target)
78 {
79 if (!target->rtos)
80 return;
81
82 if (target->rtos->symbols)
83 free(target->rtos->symbols);
84
85 free(target->rtos);
86 target->rtos = NULL;
87 }
88
89 static int os_alloc_create(struct target *target, struct rtos_type *ostype)
90 {
91 int ret = os_alloc(target, ostype);
92
93 if (JIM_OK == ret) {
94 ret = target->rtos->type->create(target);
95 if (ret != JIM_OK)
96 os_free(target);
97 }
98
99 return ret;
100 }
101
102 int rtos_create(Jim_GetOptInfo *goi, struct target *target)
103 {
104 int x;
105 char *cp;
106 struct Jim_Obj *res;
107
108 if (!goi->isconfigure && goi->argc != 0) {
109 Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "NO PARAMS");
110 return JIM_ERR;
111 }
112
113 os_free(target);
114
115 Jim_GetOpt_String(goi, &cp, NULL);
116
117 if (0 == strcmp(cp, "auto")) {
118 /* Auto detect tries to look up all symbols for each RTOS,
119 * and runs the RTOS driver's _detect() function when GDB
120 * finds all symbols for any RTOS. See rtos_qsymbol(). */
121 target->rtos_auto_detect = true;
122
123 /* rtos_qsymbol() will iterate over all RTOSes. Allocate
124 * target->rtos here, and set it to the first RTOS type. */
125 return os_alloc(target, rtos_types[0]);
126 }
127
128 for (x = 0; rtos_types[x]; x++)
129 if (0 == strcmp(cp, rtos_types[x]->name))
130 return os_alloc_create(target, rtos_types[x]);
131
132 Jim_SetResultFormatted(goi->interp, "Unknown RTOS type %s, try one of: ", cp);
133 res = Jim_GetResult(goi->interp);
134 for (x = 0; rtos_types[x]; x++)
135 Jim_AppendStrings(goi->interp, res, rtos_types[x]->name, ", ", NULL);
136 Jim_AppendStrings(goi->interp, res, " or auto", NULL);
137
138 return JIM_ERR;
139 }
140
141 int gdb_thread_packet(struct connection *connection, char *packet, int packet_size)
142 {
143 struct target *target = get_target_from_connection(connection);
144 if (target->rtos == NULL)
145 return rtos_thread_packet(connection, packet, packet_size); /* thread not
146 *found*/
147 return target->rtos->gdb_thread_packet(connection, packet, packet_size);
148 }
149
150 static char *next_symbol(struct rtos *os, char *cur_symbol, uint64_t cur_addr)
151 {
152 symbol_table_elem_t *s;
153
154 if (!os->symbols)
155 os->type->get_symbol_list_to_lookup(&os->symbols);
156
157 if (!cur_symbol[0])
158 return os->symbols[0].symbol_name;
159
160 for (s = os->symbols; s->symbol_name; s++)
161 if (!strcmp(s->symbol_name, cur_symbol)) {
162 s->address = cur_addr;
163 s++;
164 return s->symbol_name;
165 }
166
167 return NULL;
168 }
169
170 /* rtos_qsymbol() processes and replies to all qSymbol packets from GDB.
171 *
172 * GDB sends a qSymbol:: packet (empty address, empty name) to notify
173 * that it can now answer qSymbol::hexcodedname queries, to look up symbols.
174 *
175 * If the qSymbol packet has no address that means GDB did not find the
176 * symbol, in which case auto-detect will move on to try the next RTOS.
177 *
178 * rtos_qsymbol() then calls the next_symbol() helper function, which
179 * iterates over symbol names for the current RTOS until it finds the
180 * symbol in the received GDB packet, and then returns the next entry
181 * in the list of symbols.
182 *
183 * If GDB replied about the last symbol for the RTOS and the RTOS was
184 * specified explicitly, then no further symbol lookup is done. When
185 * auto-detecting, the RTOS driver _detect() function must return success.
186 *
187 * rtos_qsymbol() returns 1 if an RTOS has been detected, or 0 otherwise.
188 */
189 int rtos_qsymbol(struct connection *connection, char *packet, int packet_size)
190 {
191 int rtos_detected = 0;
192 uint64_t addr = 0;
193 size_t reply_len;
194 char reply[GDB_BUFFER_SIZE], cur_sym[GDB_BUFFER_SIZE / 2] = "", *next_sym;
195 struct target *target = get_target_from_connection(connection);
196 struct rtos *os = target->rtos;
197
198 reply_len = sprintf(reply, "OK");
199
200 if (!os)
201 goto done;
202
203 /* Decode any symbol name in the packet*/
204 int len = unhexify(cur_sym, strchr(packet + 8, ':') + 1, strlen(strchr(packet + 8, ':') + 1));
205 cur_sym[len] = 0;
206
207 if ((strcmp(packet, "qSymbol::") != 0) && /* GDB is not offering symbol lookup for the first time */
208 (!sscanf(packet, "qSymbol:%" SCNx64 ":", &addr))) { /* GDB did not found an address for a symbol */
209 /* GDB could not find an address for the previous symbol */
210 if (!target->rtos_auto_detect) {
211 LOG_WARNING("RTOS %s not detected. (GDB could not find symbol \'%s\')", os->type->name, cur_sym);
212 goto done;
213 } else {
214 /* Autodetecting RTOS - try next RTOS */
215 if (!rtos_try_next(target)) {
216 LOG_WARNING("No RTOS could be auto-detected!");
217 goto done;
218 }
219
220 /* Next RTOS selected - invalidate current symbol */
221 cur_sym[0] = '\x00';
222 }
223 }
224 next_sym = next_symbol(os, cur_sym, addr);
225
226 if (!next_sym) {
227 /* No more symbols need looking up */
228
229 if (!target->rtos_auto_detect) {
230 rtos_detected = 1;
231 goto done;
232 }
233
234 if (os->type->detect_rtos(target)) {
235 LOG_INFO("Auto-detected RTOS: %s", os->type->name);
236 rtos_detected = 1;
237 goto done;
238 } else {
239 LOG_WARNING("No RTOS could be auto-detected!");
240 goto done;
241 }
242 }
243
244 if (8 + (strlen(next_sym) * 2) + 1 > sizeof(reply)) {
245 LOG_ERROR("ERROR: RTOS symbol '%s' name is too long for GDB!", next_sym);
246 goto done;
247 }
248
249 reply_len = snprintf(reply, sizeof(reply), "qSymbol:");
250 reply_len += hexify(reply + reply_len, next_sym, 0, sizeof(reply) - reply_len);
251
252 done:
253 gdb_put_packet(connection, reply, reply_len);
254 return rtos_detected;
255 }
256
257 int rtos_thread_packet(struct connection *connection, char *packet, int packet_size)
258 {
259 struct target *target = get_target_from_connection(connection);
260
261 if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
262 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL) &&
263 (target->rtos->thread_count != 0)) {
264 threadid_t threadid = 0;
265 int found = -1;
266 sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
267
268 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL)) {
269 int thread_num;
270 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
271 if (target->rtos->thread_details[thread_num].threadid == threadid) {
272 if (target->rtos->thread_details[thread_num].exists)
273 found = thread_num;
274 }
275 }
276 }
277 if (found == -1) {
278 gdb_put_packet(connection, "E01", 3); /* thread not found */
279 return ERROR_OK;
280 }
281
282 struct thread_detail *detail = &target->rtos->thread_details[found];
283
284 int str_size = 0;
285 if (detail->display_str != NULL)
286 str_size += strlen(detail->display_str);
287 if (detail->thread_name_str != NULL)
288 str_size += strlen(detail->thread_name_str);
289 if (detail->extra_info_str != NULL)
290 str_size += strlen(detail->extra_info_str);
291
292 char *tmp_str = (char *) malloc(str_size + 7);
293 char *tmp_str_ptr = tmp_str;
294
295 if (detail->display_str != NULL)
296 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->display_str);
297 if (detail->thread_name_str != NULL) {
298 if (tmp_str_ptr != tmp_str)
299 tmp_str_ptr += sprintf(tmp_str_ptr, " : ");
300 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->thread_name_str);
301 }
302 if (detail->extra_info_str != NULL) {
303 if (tmp_str_ptr != tmp_str)
304 tmp_str_ptr += sprintf(tmp_str_ptr, " : ");
305 tmp_str_ptr +=
306 sprintf(tmp_str_ptr, " : %s", detail->extra_info_str);
307 }
308
309 assert(strlen(tmp_str) ==
310 (size_t) (tmp_str_ptr - tmp_str));
311
312 char *hex_str = (char *) malloc(strlen(tmp_str) * 2 + 1);
313 int pkt_len = hexify(hex_str, tmp_str, 0, strlen(tmp_str) * 2 + 1);
314
315 gdb_put_packet(connection, hex_str, pkt_len);
316 free(hex_str);
317 free(tmp_str);
318 return ERROR_OK;
319
320 }
321 gdb_put_packet(connection, "", 0);
322 return ERROR_OK;
323 } else if (strncmp(packet, "qSymbol", 7) == 0) {
324 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
325 target->rtos_auto_detect = false;
326 target->rtos->type->create(target);
327 target->rtos->type->update_threads(target->rtos);
328 }
329 return ERROR_OK;
330 } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
331 int i;
332 if (target->rtos != NULL) {
333 if (target->rtos->thread_count == 0) {
334 gdb_put_packet(connection, "l", 1);
335 } else {
336 /*thread id are 16 char +1 for ',' */
337 char *out_str = (char *) malloc(17 * target->rtos->thread_count + 1);
338 char *tmp_str = out_str;
339 for (i = 0; i < target->rtos->thread_count; i++) {
340 tmp_str += sprintf(tmp_str, "%c%016" PRIx64, i == 0 ? 'm' : ',',
341 target->rtos->thread_details[i].threadid);
342 }
343 gdb_put_packet(connection, out_str, strlen(out_str));
344 free(out_str);
345 }
346 } else
347 gdb_put_packet(connection, "", 0);
348
349 return ERROR_OK;
350 } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
351 gdb_put_packet(connection, "l", 1);
352 return ERROR_OK;
353 } else if (strncmp(packet, "qAttached", 9) == 0) {
354 gdb_put_packet(connection, "1", 1);
355 return ERROR_OK;
356 } else if (strncmp(packet, "qOffsets", 8) == 0) {
357 char offsets[] = "Text=0;Data=0;Bss=0";
358 gdb_put_packet(connection, offsets, sizeof(offsets)-1);
359 return ERROR_OK;
360 } else if (strncmp(packet, "qCRC:", 5) == 0) {
361 /* make sure we check this before "qC" packet below
362 * otherwise it gets incorrectly handled */
363 return GDB_THREAD_PACKET_NOT_CONSUMED;
364 } else if (strncmp(packet, "qC", 2) == 0) {
365 if (target->rtos != NULL) {
366 char buffer[19];
367 int size;
368 size = snprintf(buffer, 19, "QC%016" PRIx64, target->rtos->current_thread);
369 gdb_put_packet(connection, buffer, size);
370 } else
371 gdb_put_packet(connection, "QC0", 3);
372 return ERROR_OK;
373 } else if (packet[0] == 'T') { /* Is thread alive? */
374 threadid_t threadid;
375 int found = -1;
376 sscanf(packet, "T%" SCNx64, &threadid);
377 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL)) {
378 int thread_num;
379 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
380 if (target->rtos->thread_details[thread_num].threadid == threadid) {
381 if (target->rtos->thread_details[thread_num].exists)
382 found = thread_num;
383 }
384 }
385 }
386 if (found != -1)
387 gdb_put_packet(connection, "OK", 2); /* thread alive */
388 else
389 gdb_put_packet(connection, "E01", 3); /* thread not found */
390 return ERROR_OK;
391 } else if (packet[0] == 'H') { /* Set current thread ( 'c' for step and continue, 'g' for
392 * all other operations ) */
393 if ((packet[1] == 'g') && (target->rtos != NULL))
394 sscanf(packet, "Hg%16" SCNx64, &target->rtos->current_threadid);
395 gdb_put_packet(connection, "OK", 2);
396 return ERROR_OK;
397 }
398
399 return GDB_THREAD_PACKET_NOT_CONSUMED;
400 }
401
402 int rtos_get_gdb_reg_list(struct connection *connection)
403 {
404 struct target *target = get_target_from_connection(connection);
405 int64_t current_threadid = target->rtos->current_threadid;
406 if ((target->rtos != NULL) && (current_threadid != -1) &&
407 (current_threadid != 0) &&
408 ((current_threadid != target->rtos->current_thread) ||
409 (target->smp))) { /* in smp several current thread are possible */
410 char *hex_reg_list;
411 target->rtos->type->get_thread_reg_list(target->rtos,
412 current_threadid,
413 &hex_reg_list);
414
415 if (hex_reg_list != NULL) {
416 gdb_put_packet(connection, hex_reg_list, strlen(hex_reg_list));
417 free(hex_reg_list);
418 return ERROR_OK;
419 }
420 }
421 return ERROR_FAIL;
422 }
423
424 int rtos_generic_stack_read(struct target *target,
425 const struct rtos_register_stacking *stacking,
426 int64_t stack_ptr,
427 char **hex_reg_list)
428 {
429 int list_size = 0;
430 char *tmp_str_ptr;
431 int64_t new_stack_ptr;
432 int i;
433 int retval;
434
435 if (stack_ptr == 0) {
436 LOG_ERROR("Error: null stack pointer in thread");
437 return -5;
438 }
439 /* Read the stack */
440 uint8_t *stack_data = (uint8_t *) malloc(stacking->stack_registers_size);
441 uint32_t address = stack_ptr;
442
443 if (stacking->stack_growth_direction == 1)
444 address -= stacking->stack_registers_size;
445 retval = target_read_buffer(target, address, stacking->stack_registers_size, stack_data);
446 if (retval != ERROR_OK) {
447 free(stack_data);
448 LOG_ERROR("Error reading stack frame from thread");
449 return retval;
450 }
451 #if 0
452 LOG_OUTPUT("Stack Data :");
453 for (i = 0; i < stacking->stack_registers_size; i++)
454 LOG_OUTPUT("%02X", stack_data[i]);
455 LOG_OUTPUT("\r\n");
456 #endif
457 for (i = 0; i < stacking->num_output_registers; i++)
458 list_size += stacking->register_offsets[i].width_bits/8;
459 *hex_reg_list = (char *)malloc(list_size*2 + 1);
460 tmp_str_ptr = *hex_reg_list;
461 new_stack_ptr = stack_ptr - stacking->stack_growth_direction *
462 stacking->stack_registers_size;
463 if (stacking->stack_alignment != 0) {
464 /* Align new stack pointer to x byte boundary */
465 new_stack_ptr =
466 (new_stack_ptr & (~((int64_t) stacking->stack_alignment - 1))) +
467 ((stacking->stack_growth_direction == -1) ? stacking->stack_alignment : 0);
468 }
469 for (i = 0; i < stacking->num_output_registers; i++) {
470 int j;
471 for (j = 0; j < stacking->register_offsets[i].width_bits/8; j++) {
472 if (stacking->register_offsets[i].offset == -1)
473 tmp_str_ptr += sprintf(tmp_str_ptr, "%02x", 0);
474 else if (stacking->register_offsets[i].offset == -2)
475 tmp_str_ptr += sprintf(tmp_str_ptr, "%02x",
476 ((uint8_t *)&new_stack_ptr)[j]);
477 else
478 tmp_str_ptr += sprintf(tmp_str_ptr, "%02x",
479 stack_data[stacking->register_offsets[i].offset + j]);
480 }
481 }
482 free(stack_data);
483 /* LOG_OUTPUT("Output register string: %s\r\n", *hex_reg_list); */
484 return ERROR_OK;
485 }
486
487 int rtos_try_next(struct target *target)
488 {
489 struct rtos *os = target->rtos;
490 struct rtos_type **type = rtos_types;
491
492 if (!os)
493 return 0;
494
495 while (*type && os->type != *type)
496 type++;
497
498 if (!*type || !*(++type))
499 return 0;
500
501 os->type = *type;
502 if (os->symbols) {
503 free(os->symbols);
504 os->symbols = NULL;
505 }
506
507 return 1;
508 }
509
510 int rtos_update_threads(struct target *target)
511 {
512 if ((target->rtos != NULL) && (target->rtos->type != NULL))
513 target->rtos->type->update_threads(target->rtos);
514 return ERROR_OK;
515 }
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