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gdb: use strncmp rather than strstr
[openocd.git] / src / rtos / linux.c
blob9c955972a8469b056e168d0c0883e947739a725f
1 /***************************************************************************
2 * Copyright (C) 2011 by STEricsson *
3 * Heythem Bouhaja heythem.bouhaja@stericsson.com : creation *
4 * Michel JAOUEN michel.jaouen@stericsson.com : adaptation to rtos *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the *
18 * Free Software Foundation, Inc., *
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
20 ***************************************************************************/
21
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #include <helper/time_support.h>
27 #include <jtag/jtag.h>
28 #include "target/target.h"
29 #include "target/target_type.h"
30 #include "helper/log.h"
31 #include "helper/types.h"
32 #include "rtos.h"
33 #include "rtos_standard_stackings.h"
34 #include <target/register.h>
35 #include "server/gdb_server.h"
36
37 #define LINUX_USER_KERNEL_BORDER 0xc0000000
38 #include "linux_header.h"
39 #define PHYS
40 #define MAX_THREADS 200
41 /* specific task */
42 struct linux_os {
43 char *name;
44 uint32_t init_task_addr;
45 int thread_count;
46 int threadid_count;
47 int preupdtate_threadid_count;
48 int nr_cpus;
49 int threads_lookup;
50 int threads_needs_update;
51 struct current_thread *current_threads;
52 struct threads *thread_list;
53 /* virt2phys parameter */
54 uint32_t phys_mask;
55 uint32_t phys_base;
56 };
57
58 struct current_thread {
59 int64_t threadid;
60 int32_t core_id;
61 #ifdef PID_CHECK
62 uint32_t pid;
63 #endif
64 uint32_t TS;
65 struct current_thread *next;
66 };
67
68 struct threads {
69 char name[17];
70 uint32_t base_addr; /* address to read magic */
71 uint32_t state; /* magic value : filled only at creation */
72 uint32_t pid; /* linux pid : id for identifying a thread */
73 uint32_t oncpu; /* content cpu number in current thread */
74 uint32_t asid; /* filled only at creation */
75 int64_t threadid;
76 int status; /* dead = 1 alive = 2 current = 3 alive and current */
77 /* value that should not change during the live of a thread ? */
78 uint32_t thread_info_addr; /* contain latest thread_info_addr computed */
79 /* retrieve from thread_info */
80 struct cpu_context *context;
81 struct threads *next;
82 };
83
84 struct cpu_context {
85 uint32_t R4;
86 uint32_t R5;
87 uint32_t R6;
88 uint32_t R7;
89 uint32_t R8;
90 uint32_t R9;
91 uint32_t IP;
92 uint32_t FP;
93 uint32_t SP;
94 uint32_t PC;
95 uint32_t preempt_count;
96 };
97 struct cpu_context *cpu_context_read(struct target *target, uint32_t base_addr,
98 uint32_t *info_addr);
99 static int insert_into_threadlist(struct target *target, struct threads *t);
100
101 static int linux_os_create(struct target *target);
102
103 static int linux_os_dummy_update(struct rtos *rtos)
104 {
105 /* update is done only when thread request come
106 * too many thread to do it on each stop */
107 return 0;
108 }
109
110 static int linux_compute_virt2phys(struct target *target, uint32_t address)
111 {
112 struct linux_os *linux_os = (struct linux_os *)
113 target->rtos->rtos_specific_params;
114 uint32_t pa = 0;
115 int retval = target->type->virt2phys(target, address, &pa);
116 if (retval != ERROR_OK) {
117 LOG_ERROR("Cannot compute linux virt2phys translation");
118 /* fixes default address */
119 linux_os->phys_base = 0;
120 return ERROR_FAIL;
121 }
122
123 linux_os->init_task_addr = address;
124 address = address & linux_os->phys_mask;
125 linux_os->phys_base = pa - address;
126 return ERROR_OK;
127 }
128
129 static int linux_read_memory(struct target *target,
130 uint32_t address, uint32_t size, uint32_t count,
131 uint8_t *buffer)
132 {
133 #ifdef PHYS
134 struct linux_os *linux_os = (struct linux_os *)
135 target->rtos->rtos_specific_params;
136 uint32_t pa = (address & linux_os->phys_mask) + linux_os->phys_base;
137 #endif
138 if (address < 0xc000000) {
139 LOG_ERROR("linux awareness : address in user space");
140 return ERROR_FAIL;
141 }
142 #ifdef PHYS
143 target->type->read_phys_memory(target, pa, size, count, buffer);
144 #endif
145 target->type->read_memory(target, address, size, count, buffer);
146 return ERROR_OK;
147 }
148
149 static char *reg_converter(char *buffer, void *reg, int size)
150 {
151 int i;
152
153 for (i = 0; i < size; i++)
154 buffer += sprintf(buffer, "%02x", ((uint8_t *) reg)[i]);
155
156 return buffer;
157 }
158
159 int fill_buffer(struct target *target, uint32_t addr, uint8_t *buffer)
160 {
161
162 if ((addr & 0xfffffffc) != addr)
163 LOG_INFO("unaligned address %x!!", addr);
164
165 int retval = linux_read_memory(target, addr, 4, 1, buffer);
166 return retval;
167
168 }
169
170 uint32_t get_buffer(struct target *target, const uint8_t *buffer)
171 {
172 uint32_t value = 0;
173 const uint8_t *value_ptr = buffer;
174 value = target_buffer_get_u32(target, value_ptr);
175 return value;
176 }
177
178 static int linux_os_thread_reg_list(struct rtos *rtos,
179 int64_t thread_id, char **hex_reg_list)
180 {
181 struct target *target = rtos->target;
182 struct linux_os *linux_os = (struct linux_os *)
183 target->rtos->rtos_specific_params;
184 int i = 0;
185 struct current_thread *tmp = linux_os->current_threads;
186 struct current_thread *next;
187 char *hex_string;
188 int found = 0;
189 int retval;
190 /* check if a current thread is requested */
191 next = tmp;
192
193 do {
194 if (next->threadid == thread_id)
195 found = 1;
196 else
197 next = next->next;
198 } while ((found == 0) && (next != tmp) && (next != NULL));
199
200 if (found == 1) {
201 /* search target to perfom the access */
202 struct reg **reg_list;
203 int reg_list_size, reg_packet_size = 0;
204 struct target_list *head;
205 head = target->head;
206 found = 0;
207 do {
208 if (head->target->coreid == next->core_id) {
209
210 target = head->target;
211 found = 1;
212 } else
213 head = head->next;
214
215 } while ((head != (struct target_list *)NULL) && (found == 0));
216
217 if (found == 0) {
218 LOG_ERROR
219 (
220 "current thread %" PRIx64 ": no target to perform access of core id %x",
221 thread_id,
222 next->core_id);
223 return ERROR_FAIL;
224 }
225
226 /*LOG_INFO("thread %lx current on core %x",thread_id,
227 * target->coreid);*/
228 retval =
229 target_get_gdb_reg_list(target, &reg_list, &reg_list_size);
230
231 if (retval != ERROR_OK)
232 return retval;
233
234 for (i = 0; i < reg_list_size; i++)
235 reg_packet_size += reg_list[i]->size;
236
237 *hex_reg_list = malloc(DIV_ROUND_UP(reg_packet_size, 8) * 2);
238
239 hex_string = *hex_reg_list;
240
241 for (i = 0; i < reg_list_size; i++) {
242 if (!reg_list[i]->valid)
243 reg_list[i]->type->get(reg_list[i]);
244
245 hex_string = reg_converter(hex_string,
246 reg_list[i]->value,
247 (reg_list[i]->size) / 8);
248 }
249
250 free(reg_list);
251
252 } else {
253 struct threads *temp = linux_os->thread_list;
254 *hex_reg_list = (char *)calloc(1, 500 * sizeof(char));
255 hex_string = *hex_reg_list;
256
257 for (i = 0; i < 16; i++)
258 hex_string += sprintf(hex_string, "%02x", 0);
259
260 while ((temp != NULL) &&
261 (temp->threadid != target->rtos->current_threadid))
262 temp = temp->next;
263
264 if (temp != NULL) {
265 if (temp->context == NULL)
266 temp->context = cpu_context_read(target,
267 temp->
268 base_addr,
269 &temp->
270 thread_info_addr);
271
272 hex_string =
273 reg_converter(hex_string, &temp->context->R4, 4);
274 hex_string =
275 reg_converter(hex_string, &temp->context->R5, 4);
276 hex_string =
277 reg_converter(hex_string, &temp->context->R6, 4);
278 hex_string =
279 reg_converter(hex_string, &temp->context->R7, 4);
280 hex_string =
281 reg_converter(hex_string, &temp->context->R8, 4);
282 hex_string =
283 reg_converter(hex_string, &temp->context->R9, 4);
284
285 for (i = 0; i < 4; i++) /*R10 = 0x0 */
286 hex_string += sprintf(hex_string, "%02x", 0);
287
288 hex_string =
289 reg_converter(hex_string, &temp->context->FP, 4);
290 hex_string =
291 reg_converter(hex_string, &temp->context->IP, 4);
292 hex_string =
293 reg_converter(hex_string, &temp->context->SP, 4);
294
295 for (i = 0; i < 4; i++)
296 hex_string += sprintf(hex_string, "%02x", 0);
297
298 hex_string =
299 reg_converter(hex_string, &temp->context->PC, 4);
300
301 for (i = 0; i < 100; i++) /*100 */
302 hex_string += sprintf(hex_string, "%02x", 0);
303
304 uint32_t cpsr = 0x00000000;
305 reg_converter(hex_string, &cpsr, 4);
306 }
307 }
308 return ERROR_OK;
309 }
310
311 static int linux_os_detect(struct target *target)
312 {
313 LOG_INFO("should no be called");
314 return 0;
315 }
316
317 static int linux_os_smp_init(struct target *target);
318 static int linux_os_clean(struct target *target);
319 #define INIT_TASK 0
320 static char *linux_symbol_list[] = {
321 "init_task",
322 NULL
323 };
324
325 static int linux_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
326 {
327 unsigned int i;
328 *symbol_list = (symbol_table_elem_t *)
329 malloc(sizeof(symbol_table_elem_t) * ARRAY_SIZE(linux_symbol_list));
330
331 for (i = 0; i < ARRAY_SIZE(linux_symbol_list); i++)
332 (*symbol_list)[i].symbol_name = linux_symbol_list[i];
333
334 return 0;
335 }
336
337 static char *linux_ps_command(struct target *target);
338
339 const struct rtos_type Linux_os = {
340 .name = "linux",
341 .detect_rtos = linux_os_detect,
342 .create = linux_os_create,
343 .smp_init = linux_os_smp_init,
344 .update_threads = linux_os_dummy_update,
345 .get_thread_reg_list = linux_os_thread_reg_list,
346 .get_symbol_list_to_lookup = linux_get_symbol_list_to_lookup,
347 .clean = linux_os_clean,
348 .ps_command = linux_ps_command,
349 };
350
351 static int linux_thread_packet(struct connection *connection, char *packet,
352 int packet_size);
353 static void linux_identify_current_threads(struct target *target);
354
355 #ifdef PID_CHECK
356 int fill_task_pid(struct target *target, struct threads *t)
357 {
358 uint32_t pid_addr = t->base_addr + PID;
359 uint8_t buffer[4];
360 int retval = fill_buffer(target, pid_addr, buffer);
361
362 if (retval == ERROR_OK) {
363 uint32_t val = get_buffer(target, buffer);
364 t->pid = val;
365 } else
366 LOG_ERROR("fill_task_pid: unable to read memory");
367
368 return retval;
369 }
370 #endif
371
372 int fill_task(struct target *target, struct threads *t)
373 {
374 int retval;
375 uint32_t pid_addr = t->base_addr + PID;
376 uint32_t mem_addr = t->base_addr + MEM;
377 uint32_t on_cpu = t->base_addr + ONCPU;
378 uint8_t *buffer = calloc(1, 4);
379 retval = fill_buffer(target, t->base_addr, buffer);
380
381 if (retval == ERROR_OK) {
382 uint32_t val = get_buffer(target, buffer);
383 t->state = val;
384 } else
385 LOG_ERROR("fill_task: unable to read memory");
386
387 retval = fill_buffer(target, pid_addr, buffer);
388
389 if (retval == ERROR_OK) {
390 uint32_t val = get_buffer(target, buffer);
391 t->pid = val;
392 } else
393 LOG_ERROR("fill task: unable to read memory");
394
395 retval = fill_buffer(target, on_cpu, buffer);
396
397 if (retval == ERROR_OK) {
398 uint32_t val = get_buffer(target, buffer);
399 t->oncpu = val;
400 } else
401 LOG_ERROR("fill task: unable to read memory");
402
403 retval = fill_buffer(target, mem_addr, buffer);
404
405 if (retval == ERROR_OK) {
406 uint32_t val = get_buffer(target, buffer);
407
408 if (val != 0) {
409 uint32_t asid_addr = val + MM_CTX;
410 retval = fill_buffer(target, asid_addr, buffer);
411
412 if (retval == ERROR_OK) {
413 val = get_buffer(target, buffer);
414 t->asid = val;
415 } else
416 LOG_ERROR
417 ("fill task: unable to read memory -- ASID");
418 } else
419 t->asid = 0;
420 } else
421 LOG_ERROR("fill task: unable to read memory");
422
423 free(buffer);
424
425 return retval;
426 }
427
428 int get_name(struct target *target, struct threads *t)
429 {
430 int retval;
431 uint32_t full_name[4];
432 uint32_t comm = t->base_addr + COMM;
433 int i;
434
435 for (i = 0; i < 17; i++)
436 t->name[i] = 0;
437
438 retval = linux_read_memory(target, comm, 4, 4, (uint8_t *) full_name);
439
440 if (retval != ERROR_OK) {
441 LOG_ERROR("get_name: unable to read memory\n");
442 return ERROR_FAIL;
443 }
444
445 uint32_t raw_name = target_buffer_get_u32(target,
446 (const uint8_t *)
447 &full_name[0]);
448 t->name[3] = raw_name >> 24;
449 t->name[2] = raw_name >> 16;
450 t->name[1] = raw_name >> 8;
451 t->name[0] = raw_name;
452 raw_name =
453 target_buffer_get_u32(target, (const uint8_t *)&full_name[1]);
454 t->name[7] = raw_name >> 24;
455 t->name[6] = raw_name >> 16;
456 t->name[5] = raw_name >> 8;
457 t->name[4] = raw_name;
458 raw_name =
459 target_buffer_get_u32(target, (const uint8_t *)&full_name[2]);
460 t->name[11] = raw_name >> 24;
461 t->name[10] = raw_name >> 16;
462 t->name[9] = raw_name >> 8;
463 t->name[8] = raw_name;
464 raw_name =
465 target_buffer_get_u32(target, (const uint8_t *)&full_name[3]);
466 t->name[15] = raw_name >> 24;
467 t->name[14] = raw_name >> 16;
468 t->name[13] = raw_name >> 8;
469 t->name[12] = raw_name;
470 return ERROR_OK;
471
472 }
473
474 int get_current(struct target *target, int create)
475 {
476 struct target_list *head;
477 head = target->head;
478 uint8_t *buf;
479 uint32_t val;
480 uint32_t ti_addr;
481 uint8_t *buffer = calloc(1, 4);
482 struct linux_os *linux_os = (struct linux_os *)
483 target->rtos->rtos_specific_params;
484 struct current_thread *ctt = linux_os->current_threads;
485
486 /* invalid current threads content */
487 while (ctt != NULL) {
488 ctt->threadid = -1;
489 ctt->TS = 0xdeadbeef;
490 ctt = ctt->next;
491 }
492
493 while (head != (struct target_list *)NULL) {
494 struct reg **reg_list;
495 int reg_list_size;
496 int retval;
497
498 if (target_get_gdb_reg_list(head->target, &reg_list,
499 &reg_list_size) != ERROR_OK) {
500 free(buffer);
501 return ERROR_TARGET_FAILURE;
502 }
503
504 if (!reg_list[13]->valid)
505 reg_list[13]->type->get(reg_list[13]);
506
507 buf = reg_list[13]->value;
508 val = get_buffer(target, buf);
509 ti_addr = (val & 0xffffe000);
510 uint32_t TS_addr = ti_addr + 0xc;
511 retval = fill_buffer(target, TS_addr, buffer);
512
513 if (retval == ERROR_OK) {
514 uint32_t TS = get_buffer(target, buffer);
515 uint32_t cpu, on_cpu = TS + ONCPU;
516 retval = fill_buffer(target, on_cpu, buffer);
517
518 if (retval == ERROR_OK) {
519 /*uint32_t cpu = get_buffer(target, buffer);*/
520 struct current_thread *ct =
521 linux_os->current_threads;
522 cpu = head->target->coreid;
523
524 while ((ct != NULL) && (ct->core_id != (int32_t) cpu))
525 ct = ct->next;
526
527 if ((ct != NULL) && (ct->TS == 0xdeadbeef))
528 ct->TS = TS;
529 else
530 LOG_ERROR
531 ("error in linux current thread update");
532
533 if (create) {
534 struct threads *t;
535 t = calloc(1, sizeof(struct threads));
536 t->base_addr = ct->TS;
537 fill_task(target, t);
538 get_name(target, t);
539 t->oncpu = cpu;
540 insert_into_threadlist(target, t);
541 t->status = 3;
542 t->thread_info_addr = 0xdeadbeef;
543 ct->threadid = t->threadid;
544 linux_os->thread_count++;
545 #ifdef PID_CHECK
546 ct->pid = t->pid;
547 #endif
548 /*LOG_INFO("Creation of current thread %s",t->name);*/
549 }
550 }
551 }
552
553 free(reg_list);
554 head = head->next;
555 }
556
557 free(buffer);
558
559 return ERROR_OK;
560 }
561
562 struct cpu_context *cpu_context_read(struct target *target, uint32_t base_addr,
563 uint32_t *thread_info_addr_old)
564 {
565 struct cpu_context *context = calloc(1, sizeof(struct cpu_context));
566 uint32_t preempt_count_addr = 0;
567 uint32_t registers[10];
568 uint8_t *buffer = calloc(1, 4);
569 uint32_t stack = base_addr + QAT;
570 uint32_t thread_info_addr = 0;
571 uint32_t thread_info_addr_update = 0;
572 int retval = ERROR_FAIL;
573 context->R4 = 0xdeadbeef;
574 context->R5 = 0xdeadbeef;
575 context->R6 = 0xdeadbeef;
576 context->R7 = 0xdeadbeef;
577 context->R8 = 0xdeadbeef;
578 context->R9 = 0xdeadbeef;
579 context->IP = 0xdeadbeef;
580 context->FP = 0xdeadbeef;
581 context->SP = 0xdeadbeef;
582 context->PC = 0xdeadbeef;
583 retry:
584
585 if (*thread_info_addr_old == 0xdeadbeef) {
586 retval = fill_buffer(target, stack, buffer);
587
588 if (retval == ERROR_OK)
589 thread_info_addr = get_buffer(target, buffer);
590 else
591 LOG_ERROR("cpu_context: unable to read memory");
592
593 thread_info_addr_update = thread_info_addr;
594 } else
595 thread_info_addr = *thread_info_addr_old;
596
597 preempt_count_addr = thread_info_addr + PREEMPT;
598 retval = fill_buffer(target, preempt_count_addr, buffer);
599
600 if (retval == ERROR_OK)
601 context->preempt_count = get_buffer(target, buffer);
602 else {
603 if (*thread_info_addr_old != 0xdeadbeef) {
604 LOG_ERROR
605 ("cpu_context: cannot read at thread_info_addr");
606
607 if (*thread_info_addr_old < LINUX_USER_KERNEL_BORDER)
608 LOG_INFO
609 ("cpu_context : thread_info_addr in userspace!!!");
610
611 *thread_info_addr_old = 0xdeadbeef;
612 goto retry;
613 }
614
615 LOG_ERROR("cpu_context: unable to read memory");
616 }
617
618 thread_info_addr += CPU_CONT;
619
620 retval = linux_read_memory(target, thread_info_addr, 4, 10,
621 (uint8_t *) registers);
622
623 if (retval != ERROR_OK) {
624 free(buffer);
625 LOG_ERROR("cpu_context: unable to read memory\n");
626 return context;
627 }
628
629 context->R4 =
630 target_buffer_get_u32(target, (const uint8_t *)&registers[0]);
631 context->R5 =
632 target_buffer_get_u32(target, (const uint8_t *)&registers[1]);
633 context->R6 =
634 target_buffer_get_u32(target, (const uint8_t *)&registers[2]);
635 context->R7 =
636 target_buffer_get_u32(target, (const uint8_t *)&registers[3]);
637 context->R8 =
638 target_buffer_get_u32(target, (const uint8_t *)&registers[4]);
639 context->R9 =
640 target_buffer_get_u32(target, (const uint8_t *)&registers[5]);
641 context->IP =
642 target_buffer_get_u32(target, (const uint8_t *)&registers[6]);
643 context->FP =
644 target_buffer_get_u32(target, (const uint8_t *)&registers[7]);
645 context->SP =
646 target_buffer_get_u32(target, (const uint8_t *)&registers[8]);
647 context->PC =
648 target_buffer_get_u32(target, (const uint8_t *)&registers[9]);
649
650 if (*thread_info_addr_old == 0xdeadbeef)
651 *thread_info_addr_old = thread_info_addr_update;
652
653 free(buffer);
654
655 return context;
656 }
657
658 uint32_t next_task(struct target *target, struct threads *t)
659 {
660 uint8_t *buffer = calloc(1, 4);
661 uint32_t next_addr = t->base_addr + NEXT;
662 int retval = fill_buffer(target, next_addr, buffer);
663
664 if (retval == ERROR_OK) {
665 uint32_t val = get_buffer(target, buffer);
666 val = val - NEXT;
667 free(buffer);
668 return val;
669 } else
670 LOG_ERROR("next task: unable to read memory");
671
672 free(buffer);
673
674 return 0;
675 }
676
677 struct current_thread *add_current_thread(struct current_thread *currents,
678 struct current_thread *ct)
679 {
680 ct->next = NULL;
681
682 if (currents == NULL) {
683 currents = ct;
684 return currents;
685 } else {
686 struct current_thread *temp = currents;
687
688 while (temp->next != NULL)
689 temp = temp->next;
690
691 temp->next = ct;
692 return currents;
693 }
694 }
695
696 struct threads *liste_del_task(struct threads *task_list, struct threads **t,
697 struct threads *prev)
698 {
699 LOG_INFO("del task %" PRId64, (*t)->threadid);
700 prev->next = (*t)->next;
701
702 if (prev == task_list)
703 task_list = prev;
704
705 /* free content of threads */
706 if ((*t)->context)
707 free((*t)->context);
708
709 free(*t);
710 *t = prev;
711 return task_list;
712 }
713
714 struct threads *liste_add_task(struct threads *task_list, struct threads *t,
715 struct threads **last)
716 {
717 t->next = NULL;
718
719 if (*last == NULL)
720 if (task_list == NULL) {
721 task_list = t;
722 return task_list;
723 } else {
724 struct threads *temp = task_list;
725
726 while (temp->next != NULL)
727 temp = temp->next;
728
729 temp->next = t;
730 *last = t;
731 return task_list;
732 } else {
733 (*last)->next = t;
734 *last = t;
735 return task_list;
736 }
737 }
738
739 #ifdef PID_CHECK
740 static int current_pid(struct linux_os *linux_os, uint32_t pid)
741 #else
742 static int current_base_addr(struct linux_os *linux_os, uint32_t base_addr)
743 #endif
744 {
745 struct current_thread *ct = linux_os->current_threads;
746 #ifdef PID_CHECK
747
748 while ((ct != NULL) && (ct->pid != pid))
749 #else
750 while ((ct != NULL) && (ct->TS != base_addr))
751 #endif
752 ct = ct->next;
753 #ifdef PID_CHECK
754 if ((ct != NULL) && (ct->pid == pid))
755 #else
756 if ((ct != NULL) && (ct->TS == base_addr))
757 #endif
758 return 1;
759
760 return 0;
761 }
762
763 int linux_get_tasks(struct target *target, int context)
764 {
765 int loop = 0;
766 int retval = 0;
767 struct linux_os *linux_os = (struct linux_os *)
768 target->rtos->rtos_specific_params;
769 linux_os->thread_list = NULL;
770 linux_os->thread_count = 0;
771
772 if (linux_os->init_task_addr == 0xdeadbeef) {
773 LOG_INFO("no init symbol\n");
774 return ERROR_FAIL;
775 }
776
777 int64_t start = timeval_ms();
778
779 struct threads *t = calloc(1, sizeof(struct threads));
780 struct threads *last = NULL;
781 t->base_addr = linux_os->init_task_addr;
782 /* retrieve the thread id , currently running in the different smp core */
783 get_current(target, 1);
784
785 while (((t->base_addr != linux_os->init_task_addr) &&
786 (t->base_addr != 0)) || (loop == 0)) {
787 loop++;
788 fill_task(target, t);
789 retval = get_name(target, t);
790
791 if (loop > MAX_THREADS) {
792 free(t);
793 LOG_INFO("more than %d threads !!", MAX_THREADS);
794 return ERROR_FAIL;
795 }
796
797 if (retval != ERROR_OK) {
798 free(t);
799 return ERROR_FAIL;
800 }
801
802 /* check that this thread is not one the current threads already
803 * created */
804 #ifdef PID_CHECK
805
806 if (!current_pid(linux_os, t->pid)) {
807 #else
808 if (!current_base_addr(linux_os, t->base_addr)) {
809 #endif
810 t->threadid = linux_os->threadid_count;
811 t->status = 1;
812 linux_os->threadid_count++;
813
814 linux_os->thread_list =
815 liste_add_task(linux_os->thread_list, t, &last);
816 /* no interest to fill the context if it is a current thread. */
817 linux_os->thread_count++;
818 t->thread_info_addr = 0xdeadbeef;
819
820 if (context)
821 t->context =
822 cpu_context_read(target, t->base_addr,
823 &t->thread_info_addr);
824 } else {
825 /*LOG_INFO("thread %s is a current thread already created",t->name); */
826 free(t);
827 }
828
829 uint32_t base_addr = next_task(target, t);
830 t = calloc(1, sizeof(struct threads));
831 t->base_addr = base_addr;
832 }
833
834 linux_os->threads_lookup = 1;
835 linux_os->threads_needs_update = 0;
836 linux_os->preupdtate_threadid_count = linux_os->threadid_count - 1;
837 /* check that all current threads have been identified */
838
839 LOG_INFO("complete time %" PRId64 ", thread mean %" PRId64 "\n",
840 (timeval_ms() - start),
841 (timeval_ms() - start) / linux_os->threadid_count);
842
843 LOG_INFO("threadid count %d", linux_os->threadid_count);
844 free(t);
845
846 return ERROR_OK;
847 }
848
849 static int clean_threadlist(struct target *target)
850 {
851 struct linux_os *linux_os = (struct linux_os *)
852 target->rtos->rtos_specific_params;
853 struct threads *old, *temp = linux_os->thread_list;
854
855 while (temp != NULL) {
856 old = temp;
857
858 if (temp->context)
859 free(temp->context);
860
861 temp = temp->next;
862 free(old);
863 }
864
865 return ERROR_OK;
866 }
867
868 static int linux_os_clean(struct target *target)
869 {
870 struct linux_os *os_linux = (struct linux_os *)
871 target->rtos->rtos_specific_params;
872 clean_threadlist(target);
873 os_linux->init_task_addr = 0xdeadbeef;
874 os_linux->name = "linux";
875 os_linux->thread_list = NULL;
876 os_linux->thread_count = 0;
877 os_linux->nr_cpus = 0;
878 os_linux->threads_lookup = 0;
879 os_linux->threads_needs_update = 0;
880 os_linux->threadid_count = 1;
881 return ERROR_OK;
882 }
883
884 static int insert_into_threadlist(struct target *target, struct threads *t)
885 {
886 struct linux_os *linux_os = (struct linux_os *)
887 target->rtos->rtos_specific_params;
888 struct threads *temp = linux_os->thread_list;
889 t->threadid = linux_os->threadid_count;
890 linux_os->threadid_count++;
891 t->status = 1;
892 t->next = NULL;
893
894 if (temp == NULL)
895 linux_os->thread_list = t;
896 else {
897 while (temp->next != NULL)
898 temp = temp->next;
899
900 t->next = NULL;
901 temp->next = t;
902 }
903
904 return ERROR_OK;
905 }
906
907 static void linux_identify_current_threads(struct target *target)
908 {
909 struct linux_os *linux_os = (struct linux_os *)
910 target->rtos->rtos_specific_params;
911 struct threads *thread_list = linux_os->thread_list;
912 struct current_thread *ct = linux_os->current_threads;
913 struct threads *t = NULL;
914
915 while ((ct != NULL)) {
916 if (ct->threadid == -1) {
917
918 /* un-identified thread */
919 int found = 0;
920 t = calloc(1, sizeof(struct threads));
921 t->base_addr = ct->TS;
922 #ifdef PID_CHECK
923
924 if (fill_task_pid(target, t) != ERROR_OK) {
925 error_handling:
926 free(t);
927 LOG_ERROR
928 ("linux identify_current_threads: unable to read pid");
929 return;
930 }
931 #endif
932
933 /* search in the list of threads if pid
934 already present */
935 while ((thread_list != NULL) && (found == 0)) {
936 #ifdef PID_CHECK
937 if (thread_list->pid == t->pid) {
938 #else
939 if (thread_list->base_addr == t->base_addr) {
940 #endif
941 free(t);
942 t = thread_list;
943 found = 1;
944 }
945 thread_list = thread_list->next;
946 }
947
948 if (!found) {
949 /* it is a new thread */
950 if (fill_task(target, t) != ERROR_OK)
951 goto error_handling;
952
953 get_name(target, t);
954 insert_into_threadlist(target, t);
955 t->thread_info_addr = 0xdeadbeef;
956 }
957
958 t->status = 3;
959 ct->threadid = t->threadid;
960 #ifdef PID_CHECK
961 ct->pid = t->pid;
962 #endif
963 linux_os->thread_count++;
964 #if 0
965 if (found == 0)
966 LOG_INFO("current thread core %x identified %s",
967 ct->core_id, t->name);
968 else
969 LOG_INFO("current thread core %x, reused %s",
970 ct->core_id, t->name);
971 #endif
972 }
973 #if 0
974 else {
975 struct threads tmp;
976 tmp.base_addr = ct->TS;
977 get_name(target, &tmp);
978 LOG_INFO("current thread core %x , already identified %s !!!",
979 ct->core_id, tmp.name);
980 }
981 #endif
982 ct = ct->next;
983 }
984
985 return;
986 #ifndef PID_CHECK
987 error_handling:
988 free(t);
989 LOG_ERROR("unable to read pid");
990 return;
991
992 #endif
993 }
994
995 static int linux_task_update(struct target *target, int context)
996 {
997 struct linux_os *linux_os = (struct linux_os *)
998 target->rtos->rtos_specific_params;
999 struct threads *thread_list = linux_os->thread_list;
1000 int retval;
1001 int loop = 0;
1002 linux_os->thread_count = 0;
1003
1004 /*thread_list = thread_list->next; skip init_task*/
1005 while (thread_list != NULL) {
1006 thread_list->status = 0; /*setting all tasks to dead state*/
1007
1008 if (thread_list->context) {
1009 free(thread_list->context);
1010 thread_list->context = NULL;
1011 }
1012
1013 thread_list = thread_list->next;
1014 }
1015
1016 int found = 0;
1017
1018 if (linux_os->init_task_addr == 0xdeadbeef) {
1019 LOG_INFO("no init symbol\n");
1020 return ERROR_FAIL;
1021 }
1022 int64_t start = timeval_ms();
1023 struct threads *t = calloc(1, sizeof(struct threads));
1024 uint32_t previous = 0xdeadbeef;
1025 t->base_addr = linux_os->init_task_addr;
1026 retval = get_current(target, 0);
1027 /*check that all current threads have been identified */
1028 linux_identify_current_threads(target);
1029
1030 while (((t->base_addr != linux_os->init_task_addr) &&
1031 (t->base_addr != previous)) || (loop == 0)) {
1032 /* for avoiding any permanent loop for any reason possibly due to
1033 * target */
1034 loop++;
1035 previous = t->base_addr;
1036 /* read only pid */
1037 #ifdef PID_CHECK
1038 retval = fill_task_pid(target, t);
1039 #endif
1040
1041 if (retval != ERROR_OK) {
1042 free(t);
1043 return ERROR_FAIL;
1044 }
1045
1046 thread_list = linux_os->thread_list;
1047
1048 while (thread_list != NULL) {
1049 #ifdef PID_CHECK
1050 if (t->pid == thread_list->pid) {
1051 #else
1052 if (t->base_addr == thread_list->base_addr) {
1053 #endif
1054 if (!thread_list->status) {
1055 #ifdef PID_CHECK
1056 if (t->base_addr != thread_list->base_addr)
1057 LOG_INFO("thread base_addr has changed !!");
1058 #endif
1059 /* this is not a current thread */
1060 thread_list->base_addr = t->base_addr;
1061 thread_list->status = 1;
1062
1063 /* we don 't update this field any more */
1064
1065 /*thread_list->state = t->state;
1066 thread_list->oncpu = t->oncpu;
1067 thread_list->asid = t->asid;
1068 */
1069 if (context)
1070 thread_list->context =
1071 cpu_context_read(target,
1072 thread_list->
1073 base_addr,
1074 &thread_list->
1075 thread_info_addr);
1076 } else {
1077 /* it is a current thread no need to read context */
1078 }
1079
1080 linux_os->thread_count++;
1081 found = 1;
1082 break;
1083 } else {
1084 found = 0;
1085 thread_list = thread_list->next;
1086 }
1087 }
1088
1089 if (found == 0) {
1090 uint32_t base_addr;
1091 fill_task(target, t);
1092 get_name(target, t);
1093 retval = insert_into_threadlist(target, t);
1094 t->thread_info_addr = 0xdeadbeef;
1095
1096 if (context)
1097 t->context =
1098 cpu_context_read(target, t->base_addr,
1099 &t->thread_info_addr);
1100
1101 base_addr = next_task(target, t);
1102 t = calloc(1, sizeof(struct threads));
1103 t->base_addr = base_addr;
1104 linux_os->thread_count++;
1105 } else
1106 t->base_addr = next_task(target, t);
1107 }
1108
1109 LOG_INFO("update thread done %" PRId64 ", mean%" PRId64 "\n",
1110 (timeval_ms() - start), (timeval_ms() - start) / loop);
1111 free(t);
1112 linux_os->threads_needs_update = 0;
1113 return ERROR_OK;
1114 }
1115
1116 int linux_gdb_thread_packet(struct target *target,
1117 struct connection *connection, char *packet,
1118 int packet_size)
1119 {
1120 int retval;
1121 struct linux_os *linux_os =
1122 (struct linux_os *)target->rtos->rtos_specific_params;
1123
1124 if (linux_os->init_task_addr == 0xdeadbeef) {
1125 /* it has not been initialized */
1126 LOG_INFO("received thread request without init task address");
1127 gdb_put_packet(connection, "l", 1);
1128 return ERROR_OK;
1129 }
1130
1131 retval = linux_get_tasks(target, 1);
1132
1133 if (retval != ERROR_OK)
1134 return ERROR_TARGET_FAILURE;
1135
1136 char *out_str = (char *)calloc(1, 350 * sizeof(int64_t));
1137 char *tmp_str = out_str;
1138 tmp_str += sprintf(tmp_str, "m");
1139 struct threads *temp = linux_os->thread_list;
1140 tmp_str += sprintf(tmp_str, "%016" PRIx64, temp->threadid);
1141 temp = temp->next;
1142
1143 while (temp != NULL) {
1144 tmp_str += sprintf(tmp_str, ",");
1145 tmp_str += sprintf(tmp_str, "%016" PRIx64, temp->threadid);
1146 temp = temp->next;
1147 }
1148
1149 gdb_put_packet(connection, out_str, strlen(out_str));
1150 return ERROR_OK;
1151 }
1152
1153 int linux_gdb_thread_update(struct target *target,
1154 struct connection *connection, char *packet,
1155 int packet_size)
1156 {
1157 int found = 0;
1158 struct linux_os *linux_os = (struct linux_os *)
1159 target->rtos->rtos_specific_params;
1160 struct threads *temp = linux_os->thread_list;
1161
1162 while (temp != NULL) {
1163 if (temp->threadid == linux_os->preupdtate_threadid_count + 1) {
1164 /*LOG_INFO("FOUND");*/
1165 found = 1;
1166 break;
1167 } else
1168 temp = temp->next;
1169 }
1170
1171 if (found == 1) {
1172 /*LOG_INFO("INTO GDB THREAD UPDATE FOUNDING START TASK");*/
1173 char *out_strr = (char *)calloc(1, 350 * sizeof(int64_t));
1174 char *tmp_strr = out_strr;
1175 tmp_strr += sprintf(tmp_strr, "m");
1176 /*LOG_INFO("CHAR MALLOC & M DONE");*/
1177 tmp_strr += sprintf(tmp_strr, "%016" PRIx64, temp->threadid);
1178
1179 temp = temp->next;
1180
1181 while (temp != NULL) {
1182 /*LOG_INFO("INTO GDB THREAD UPDATE WHILE");*/
1183 tmp_strr += sprintf(tmp_strr, ",");
1184 tmp_strr +=
1185 sprintf(tmp_strr, "%016" PRIx64, temp->threadid);
1186 temp = temp->next;
1187 }
1188
1189 /*tmp_str[0] = 0;*/
1190 gdb_put_packet(connection, out_strr, strlen(out_strr));
1191 linux_os->preupdtate_threadid_count =
1192 linux_os->threadid_count - 1;
1193 free(out_strr);
1194 } else
1195 gdb_put_packet(connection, "l", 1);
1196
1197 return ERROR_OK;
1198 }
1199
1200 int linux_thread_extra_info(struct target *target,
1201 struct connection *connection, char *packet,
1202 int packet_size)
1203 {
1204 int64_t threadid = 0;
1205 struct linux_os *linux_os = (struct linux_os *)
1206 target->rtos->rtos_specific_params;
1207 sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
1208 /*LOG_INFO("lookup extra info for thread %" SCNx64, threadid);*/
1209 struct threads *temp = linux_os->thread_list;
1210
1211 while (temp != NULL) {
1212 if (temp->threadid == threadid) {
1213 char *pid = " PID: ";
1214 char *pid_current = "*PID: ";
1215 char *name = "NAME: ";
1216 int str_size = strlen(pid) + strlen(name);
1217 char *tmp_str = (char *)calloc(1, str_size + 50);
1218 char *tmp_str_ptr = tmp_str;
1219
1220 /* discriminate cuurent task */
1221 if (temp->status == 3)
1222 tmp_str_ptr += sprintf(tmp_str_ptr, "%s",
1223 pid_current);
1224 else
1225 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", pid);
1226
1227 tmp_str_ptr +=
1228 sprintf(tmp_str_ptr, "%d", (int)temp->pid);
1229 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", " | ");
1230 sprintf(tmp_str_ptr, "%s", name);
1231 sprintf(tmp_str_ptr, "%s", temp->name);
1232 char *hex_str =
1233 (char *)calloc(1, strlen(tmp_str) * 2 + 1);
1234 str_to_hex(hex_str, tmp_str);
1235 gdb_put_packet(connection, hex_str, strlen(hex_str));
1236 free(hex_str);
1237 free(tmp_str);
1238 return ERROR_OK;
1239 }
1240
1241 temp = temp->next;
1242 }
1243
1244 LOG_INFO("thread not found");
1245 return ERROR_OK;
1246 }
1247
1248 int linux_gdb_T_packet(struct connection *connection,
1249 struct target *target, char *packet, int packet_size)
1250 {
1251 int64_t threadid;
1252 struct linux_os *linux_os = (struct linux_os *)
1253 target->rtos->rtos_specific_params;
1254 int retval = ERROR_OK;
1255 sscanf(packet, "T%" SCNx64, &threadid);
1256
1257 if (linux_os->threads_needs_update == 0) {
1258 struct threads *temp = linux_os->thread_list;
1259 struct threads *prev = linux_os->thread_list;
1260
1261 while (temp != NULL) {
1262 if (temp->threadid == threadid) {
1263 if (temp->status != 0) {
1264 gdb_put_packet(connection, "OK", 2);
1265 return ERROR_OK;
1266 } else {
1267 /* delete item in the list */
1268 linux_os->thread_list =
1269 liste_del_task(linux_os->
1270 thread_list, &temp,
1271 prev);
1272 linux_os->thread_count--;
1273 gdb_put_packet(connection, "E01", 3);
1274 return ERROR_OK;
1275 }
1276 }
1277
1278 /* for deletion */
1279 prev = temp;
1280 temp = temp->next;
1281 }
1282
1283 LOG_INFO("gdb requested status on non existing thread");
1284 gdb_put_packet(connection, "E01", 3);
1285 return ERROR_OK;
1286
1287 } else {
1288 retval = linux_task_update(target, 1);
1289 struct threads *temp = linux_os->thread_list;
1290
1291 while (temp != NULL) {
1292 if (temp->threadid == threadid) {
1293 if (temp->status == 1) {
1294 gdb_put_packet(connection, "OK", 2);
1295 return ERROR_OK;
1296 } else {
1297 gdb_put_packet(connection, "E01", 3);
1298 return ERROR_OK;
1299 }
1300 }
1301
1302 temp = temp->next;
1303 }
1304 }
1305
1306 return retval;
1307 }
1308
1309 int linux_gdb_h_packet(struct connection *connection,
1310 struct target *target, char *packet, int packet_size)
1311 {
1312 struct linux_os *linux_os = (struct linux_os *)
1313 target->rtos->rtos_specific_params;
1314 struct current_thread *ct = linux_os->current_threads;
1315
1316 /* select to display the current thread of the selected target */
1317 while ((ct != NULL) && (ct->core_id != target->coreid))
1318 ct = ct->next;
1319
1320 int64_t current_gdb_thread_rq;
1321
1322 if (linux_os->threads_lookup == 1) {
1323 if ((ct != NULL) && (ct->threadid == -1)) {
1324 ct = linux_os->current_threads;
1325
1326 while ((ct != NULL) && (ct->threadid == -1))
1327 ct = ct->next;
1328 }
1329
1330 if (ct == NULL) {
1331 /* no current thread can be identified
1332 * any way with smp */
1333 LOG_INFO("no current thread identified");
1334 /* attempt to display the name of the 2 threads identified with
1335 * get_current */
1336 struct threads t;
1337 ct = linux_os->current_threads;
1338
1339 while ((ct != NULL) && (ct->threadid == -1)) {
1340 t.base_addr = ct->TS;
1341 get_name(target, &t);
1342 LOG_INFO("name of unidentified thread %s",
1343 t.name);
1344 ct = ct->next;
1345 }
1346
1347 gdb_put_packet(connection, "OK", 2);
1348 return ERROR_OK;
1349 }
1350
1351 if (packet[1] == 'g') {
1352 sscanf(packet, "Hg%16" SCNx64, &current_gdb_thread_rq);
1353
1354 if (current_gdb_thread_rq == 0) {
1355 target->rtos->current_threadid = ct->threadid;
1356 gdb_put_packet(connection, "OK", 2);
1357 } else {
1358 target->rtos->current_threadid =
1359 current_gdb_thread_rq;
1360 gdb_put_packet(connection, "OK", 2);
1361 }
1362 } else if (packet[1] == 'c') {
1363 sscanf(packet, "Hc%16" SCNx64, &current_gdb_thread_rq);
1364
1365 if ((current_gdb_thread_rq == 0) ||
1366 (current_gdb_thread_rq == ct->threadid)) {
1367 target->rtos->current_threadid = ct->threadid;
1368 gdb_put_packet(connection, "OK", 2);
1369 } else
1370 gdb_put_packet(connection, "E01", 3);
1371 }
1372 } else
1373 gdb_put_packet(connection, "OK", 2);
1374
1375 return ERROR_OK;
1376 }
1377
1378 static int linux_thread_packet(struct connection *connection, char *packet,
1379 int packet_size)
1380 {
1381 int retval = ERROR_OK;
1382 struct current_thread *ct;
1383 struct target *target = get_target_from_connection(connection);
1384 struct linux_os *linux_os = (struct linux_os *)
1385 target->rtos->rtos_specific_params;
1386
1387 switch (packet[0]) {
1388 case 'T': /* Is thread alive?*/
1389
1390 linux_gdb_T_packet(connection, target, packet, packet_size);
1391 break;
1392 case 'H': /* Set current thread */
1393 /* ( 'c' for step and continue, 'g' for all other operations )*/
1394 /*LOG_INFO(" H packet received '%s'", packet);*/
1395 linux_gdb_h_packet(connection, target, packet, packet_size);
1396 break;
1397 case 'q':
1398
1399 if (strncmp(packet, "qSymbol", 7) == 0) {
1400 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
1401 linux_compute_virt2phys(target,
1402 target->rtos->
1403 symbols[INIT_TASK].
1404 address);
1405 }
1406
1407 break;
1408 } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
1409 if (linux_os->thread_list == NULL) {
1410 retval = linux_gdb_thread_packet(target,
1411 connection,
1412 packet,
1413 packet_size);
1414 break;
1415 } else {
1416 retval = linux_gdb_thread_update(target,
1417 connection,
1418 packet,
1419 packet_size);
1420 break;
1421 }
1422 } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
1423 gdb_put_packet(connection, "l", 1);
1424 break;
1425 } else if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
1426 linux_thread_extra_info(target, connection, packet,
1427 packet_size);
1428 break;
1429 } else {
1430 retval = GDB_THREAD_PACKET_NOT_CONSUMED;
1431 break;
1432 }
1433
1434 case 'Q':
1435 /* previously response was : thread not found
1436 * gdb_put_packet(connection, "E01", 3); */
1437 retval = GDB_THREAD_PACKET_NOT_CONSUMED;
1438 break;
1439 case 'c':
1440 case 's': {
1441 if (linux_os->threads_lookup == 1) {
1442 ct = linux_os->current_threads;
1443
1444 while ((ct != NULL) && (ct->core_id) != target->coreid)
1445 ct = ct->next;
1446
1447 if ((ct != NULL) && (ct->threadid == -1)) {
1448 ct = linux_os->current_threads;
1449
1450 while ((ct != NULL) && (ct->threadid == -1))
1451 ct = ct->next;
1452 }
1453
1454 if ((ct != NULL) && (ct->threadid !=
1455 target->rtos->
1456 current_threadid)
1457 && (target->rtos->current_threadid != -1))
1458 LOG_WARNING("WARNING! current GDB thread do not match" \
1459 "current thread running." \
1460 "Switch thread in GDB to threadid %d",
1461 (int)ct->threadid);
1462
1463 LOG_INFO("threads_needs_update = 1");
1464 linux_os->threads_needs_update = 1;
1465 }
1466 }
1467
1468 /* if a packet handler returned an error, exit input loop */
1469 if (retval != ERROR_OK)
1470 return retval;
1471 }
1472
1473 return retval;
1474 }
1475
1476 static int linux_os_smp_init(struct target *target)
1477 {
1478 struct target_list *head;
1479 /* keep only target->rtos */
1480 struct rtos *rtos = target->rtos;
1481 struct linux_os *os_linux =
1482 (struct linux_os *)rtos->rtos_specific_params;
1483 struct current_thread *ct;
1484 head = target->head;
1485
1486 while (head != (struct target_list *)NULL) {
1487 if (head->target->rtos != rtos) {
1488 struct linux_os *smp_os_linux =
1489 (struct linux_os *)head->target->rtos->
1490 rtos_specific_params;
1491 /* remap smp target on rtos */
1492 free(head->target->rtos);
1493 head->target->rtos = rtos;
1494 /* reuse allocated ct */
1495 ct = smp_os_linux->current_threads;
1496 ct->threadid = -1;
1497 ct->TS = 0xdeadbeef;
1498 ct->core_id = head->target->coreid;
1499 os_linux->current_threads =
1500 add_current_thread(os_linux->current_threads, ct);
1501 os_linux->nr_cpus++;
1502 free(smp_os_linux);
1503 }
1504
1505 head = head->next;
1506 }
1507
1508 return ERROR_OK;
1509 }
1510
1511 static int linux_os_create(struct target *target)
1512 {
1513 struct linux_os *os_linux = calloc(1, sizeof(struct linux_os));
1514 struct current_thread *ct = calloc(1, sizeof(struct current_thread));
1515 LOG_INFO("linux os creation\n");
1516 os_linux->init_task_addr = 0xdeadbeef;
1517 os_linux->name = "linux";
1518 os_linux->thread_list = NULL;
1519 os_linux->thread_count = 0;
1520 target->rtos->current_threadid = -1;
1521 os_linux->nr_cpus = 1;
1522 os_linux->threads_lookup = 0;
1523 os_linux->threads_needs_update = 0;
1524 os_linux->threadid_count = 1;
1525 os_linux->current_threads = NULL;
1526 target->rtos->rtos_specific_params = (void *)os_linux;
1527 ct->core_id = target->coreid;
1528 ct->threadid = -1;
1529 ct->TS = 0xdeadbeef;
1530 os_linux->current_threads =
1531 add_current_thread(os_linux->current_threads, ct);
1532 /* overload rtos thread default handler */
1533 target->rtos->gdb_thread_packet = linux_thread_packet;
1534 /* initialize a default virt 2 phys translation */
1535 os_linux->phys_mask = ~0xc0000000;
1536 os_linux->phys_base = 0x0;
1537 return JIM_OK;
1538 }
1539
1540 static char *linux_ps_command(struct target *target)
1541 {
1542 struct linux_os *linux_os = (struct linux_os *)
1543 target->rtos->rtos_specific_params;
1544 int retval = ERROR_OK;
1545 char *display;
1546
1547 if (linux_os->threads_lookup == 0)
1548 retval = linux_get_tasks(target, 1);
1549 else {
1550 if (linux_os->threads_needs_update != 0)
1551 retval = linux_task_update(target, 0);
1552 }
1553
1554 if (retval == ERROR_OK) {
1555 struct threads *temp = linux_os->thread_list;
1556 char *tmp;
1557 LOG_INFO("allocation for %d threads line",
1558 linux_os->thread_count);
1559 display = calloc((linux_os->thread_count + 2) * 80, 1);
1560
1561 if (!display)
1562 goto error;
1563
1564 tmp = display;
1565 tmp += sprintf(tmp, "PID\t\tCPU\t\tASID\t\tNAME\n");
1566 tmp += sprintf(tmp, "---\t\t---\t\t----\t\t----\n");
1567
1568 while (temp != NULL) {
1569 if (temp->status) {
1570 if (temp->context)
1571 tmp +=
1572 sprintf(tmp,
1573 "%d\t\t%d\t\t%x\t\t%s\n",
1574 (int)temp->pid, temp->oncpu,
1575 temp->asid, temp->name);
1576 else
1577 tmp +=
1578 sprintf(tmp,
1579 "%d\t\t%d\t\t%x\t\t%s\n",
1580 (int)temp->pid, temp->oncpu,
1581 temp->asid, temp->name);
1582 }
1583
1584 temp = temp->next;
1585 }
1586
1587 return display;
1588 }
1589
1590 error:
1591 display = calloc(40, 1);
1592 sprintf(display, "linux_ps_command failed\n");
1593 return display;
1594 }
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