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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   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  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include "gdb_server.h"
  27
  28 #include "server.h"
  29 #include "log.h"
  30 #include "binarybuffer.h"
  31 #include "breakpoints.h"
  32 #include "flash.h"
  33 #include "target_request.h"
  34
  35 #define __USE_GNU
  36 #include <string.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39 #include <stdlib.h>
  40
  41 #if 0
  42 #define _DEBUG_GDB_IO_
  43 #endif
  44
  45 static unsigned short gdb_port;
  46
  47 enum gdb_detach_mode
  48 {
  49         GDB_DETACH_RESUME,
  50         GDB_DETACH_RESET,
  51         GDB_DETACH_HALT,
  52         GDB_DETACH_NOTHING
  53 };
  54
  55 enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
  56
  57 int gdb_last_signal(target_t *target)
  58 {
  59         switch (target->debug_reason)
  60         {
  61                 case DBG_REASON_DBGRQ:
  62                         return 0x2; /* SIGINT */
  63                 case DBG_REASON_BREAKPOINT:
  64                 case DBG_REASON_WATCHPOINT:
  65                 case DBG_REASON_WPTANDBKPT:
  66                         return 0x05; /* SIGTRAP */
  67                 case DBG_REASON_SINGLESTEP:
  68                         return 0x05; /* SIGTRAP */
  69                 case DBG_REASON_NOTHALTED:
  70                         return 0x0; /* no signal... shouldn't happen */
  71                 default:
  72                         ERROR("BUG: undefined debug reason");
  73                         exit(-1);
  74         }
  75 }
  76
  77 int gdb_get_char(connection_t *connection, int* next_char)
  78 {
  79         gdb_connection_t *gdb_con = connection->priv;
  80         char *debug_buffer;
  81
  82         if (gdb_con->buf_cnt-- > 0)
  83         {
  84                 *next_char = *(gdb_con->buf_p++);
  85                 if (gdb_con->buf_cnt > 0)
  86                         connection->input_pending = 1;
  87                 else
  88                         connection->input_pending = 0;
  89
  90 #ifdef _DEBUG_GDB_IO_
  91                 DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
  92 #endif
  93
  94                 return ERROR_OK;
  95         }
  96
  97         while ((gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0)
  98         {
  99                 if (gdb_con->buf_cnt == 0)
 100                         return ERROR_SERVER_REMOTE_CLOSED;
 101
 102 #ifdef _WIN32
 103                 errno = WSAGetLastError();
 104
 105                 switch(errno)
 106                 {
 107                         case WSAEWOULDBLOCK:
 108                                 usleep(1000);
 109                                 break;
 110                         case WSAECONNABORTED:
 111                                 return ERROR_SERVER_REMOTE_CLOSED;
 112                         default:
 113                                 ERROR("read: %d", errno);
 114                                 exit(-1);
 115                 }
 116 #else
 117                 switch(errno)
 118                 {
 119                         case EAGAIN:
 120                                 usleep(1000);
 121                                 break;
 122                         case ECONNABORTED:
 123                                 return ERROR_SERVER_REMOTE_CLOSED;
 124                         case ECONNRESET:
 125                                 return ERROR_SERVER_REMOTE_CLOSED;
 126                         default:
 127                                 ERROR("read: %s", strerror(errno));
 128                                 exit(-1);
 129                 }
 130 #endif
 131         }
 132
 133         debug_buffer = malloc(gdb_con->buf_cnt + 1);
 134         memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
 135         debug_buffer[gdb_con->buf_cnt] = 0;
 136         DEBUG("received '%s'", debug_buffer);
 137         free(debug_buffer);
 138
 139         gdb_con->buf_p = gdb_con->buffer;
 140         gdb_con->buf_cnt--;
 141         *next_char = *(gdb_con->buf_p++);
 142         if (gdb_con->buf_cnt > 0)
 143                 connection->input_pending = 1;
 144         else
 145                 connection->input_pending = 0;
 146 #ifdef _DEBUG_GDB_IO_
 147         DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
 148 #endif
 149
 150         return ERROR_OK;
 151 }
 152
 153 int gdb_putback_char(connection_t *connection, int last_char)
 154 {
 155         gdb_connection_t *gdb_con = connection->priv;
 156
 157         if (gdb_con->buf_p > gdb_con->buffer)
 158         {
 159                 *(--gdb_con->buf_p) = last_char;
 160                 gdb_con->buf_cnt++;
 161         }
 162         else
 163         {
 164                 ERROR("BUG: couldn't put character back");
 165         }
 166
 167         return ERROR_OK;
 168 }
 169
 170 int gdb_put_packet(connection_t *connection, char *buffer, int len)
 171 {
 172         int i;
 173         unsigned char my_checksum = 0;
 174         char checksum[3];
 175         char *debug_buffer;
 176         int reply;
 177         int retval;
 178         gdb_connection_t *gdb_con = connection->priv;
 179
 180         for (i = 0; i < len; i++)
 181                 my_checksum += buffer[i];
 182
 183         while (1)
 184         {
 185                 debug_buffer = malloc(len + 1);
 186                 memcpy(debug_buffer, buffer, len);
 187                 debug_buffer[len] = 0;
 188                 DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
 189                 free(debug_buffer);
 190
 191                 write_socket(connection->fd, "$", 1);
 192                 if (len > 0)
 193                         write_socket(connection->fd, buffer, len);
 194                 write_socket(connection->fd, "#", 1);
 195
 196                 snprintf(checksum, 3, "%2.2x", my_checksum);
 197
 198                 write_socket(connection->fd, checksum, 2);
 199
 200                 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 201                         return retval;
 202
 203                 if (reply == '+')
 204                         break;
 205                 else if (reply == '-')
 206                         WARNING("negative reply, retrying");
 207                 else if (reply == 0x3)
 208                 {
 209                         gdb_con->ctrl_c = 1;
 210                         if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 211                                 return retval;
 212                         if (reply == '+')
 213                                 break;
 214                         else if (reply == '-')
 215                                 WARNING("negative reply, retrying");
 216                         else
 217                         {
 218                                 ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
 219                                 return ERROR_SERVER_REMOTE_CLOSED;
 220                         }
 221                 }
 222                 else
 223                 {
 224                         ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
 225                         return ERROR_SERVER_REMOTE_CLOSED;
 226                 }
 227         }
 228
 229         return ERROR_OK;
 230 }
 231
 232 int gdb_get_packet(connection_t *connection, char *buffer, int *len)
 233 {
 234         int character;
 235         int count = 0;
 236         int retval;
 237         char checksum[3];
 238         unsigned char my_checksum = 0;
 239         gdb_connection_t *gdb_con = connection->priv;
 240
 241         while (1)
 242         {
 243                 do
 244                 {
 245                         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 246                                 return retval;
 247
 248                         DEBUG("character: '%c'", character);
 249
 250                         switch (character)
 251                         {
 252                                 case '$':
 253                                         break;
 254                                 case '+':
 255                                         WARNING("acknowledgment received, but no packet pending");
 256                                         break;
 257                                 case '-':
 258                                         WARNING("negative acknowledgment, but no packet pending");
 259                                         break;
 260                                 case 0x3:
 261                                         gdb_con->ctrl_c = 1;
 262                                         *len = 0;
 263                                         return ERROR_OK;
 264                                 default:
 265                                         WARNING("ignoring character 0x%x", character);
 266                                         break;
 267                         }
 268                 } while (character != '$');
 269
 270                 my_checksum = 0;
 271
 272                 do
 273                 {
 274                         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 275                                 return retval;
 276
 277                         if (character == '#') break;
 278
 279                         if (character == '}')
 280                         {
 281                                 /* data transmitted in binary mode (X packet)
 282                                  * uses 0x7d as escape character */
 283                                 my_checksum += character & 0xff;
 284                                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 285                                         return retval;
 286                                 my_checksum += character & 0xff;
 287                                 buffer[count++] = (character ^ 0x20) & 0xff;
 288                         }
 289                         else
 290                         {
 291                                 my_checksum += character & 0xff;
 292                                 buffer[count++] = character & 0xff;
 293                         }
 294
 295                         if (count > *len)
 296                         {
 297                                 ERROR("packet buffer too small");
 298                                 return ERROR_GDB_BUFFER_TOO_SMALL;
 299                         }
 300                 } while (1);
 301
 302                 *len = count;
 303
 304                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 305                         return retval;
 306                 checksum[0] = character;
 307                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 308                         return retval;
 309                 checksum[1] = character;
 310                 checksum[2] = 0;
 311
 312                 if (my_checksum == strtoul(checksum, NULL, 16))
 313                 {
 314                         write_socket(connection->fd, "+", 1);
 315                         break;
 316                 }
 317
 318                 WARNING("checksum error, requesting retransmission");
 319                 write_socket(connection->fd, "-", 1);
 320         }
 321
 322         return ERROR_OK;
 323 }
 324
 325 int gdb_output(struct command_context_s *context, char* line)
 326 {
 327         connection_t *connection = context->output_handler_priv;
 328         char *hex_buffer;
 329         int i, bin_size;
 330
 331         bin_size = strlen(line);
 332
 333         hex_buffer = malloc(bin_size*2 + 4);
 334
 335         hex_buffer[0] = 'O';
 336         for (i=0; i<bin_size; i++)
 337                 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
 338         hex_buffer[bin_size*2+1] = '0';
 339         hex_buffer[bin_size*2+2] = 'a';
 340         hex_buffer[bin_size*2+3] = 0x0;
 341
 342         gdb_put_packet(connection, hex_buffer, bin_size*2 + 3);
 343
 344         free(hex_buffer);
 345         return ERROR_OK;
 346 }
 347
 348 int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
 349 {
 350         connection_t *connection = priv;
 351         gdb_connection_t *gdb_connection = connection->priv;
 352         char sig_reply[4];
 353         int signal;
 354
 355         switch (event)
 356         {
 357                 case TARGET_EVENT_HALTED:
 358                         if (gdb_connection->frontend_state == TARGET_RUNNING)
 359                         {
 360                                 if (gdb_connection->ctrl_c)
 361                                 {
 362                                         signal = 0x2;
 363                                         gdb_connection->ctrl_c = 0;
 364                                 }
 365                                 else
 366                                 {
 367                                         signal = gdb_last_signal(target);
 368                                 }
 369
 370                                 snprintf(sig_reply, 4, "T%2.2x", signal);
 371                                 gdb_put_packet(connection, sig_reply, 3);
 372                                 gdb_connection->frontend_state = TARGET_HALTED;
 373                         }
 374                         break;
 375                 case TARGET_EVENT_RESUMED:
 376                         if (gdb_connection->frontend_state == TARGET_HALTED)
 377                         {
 378                                 gdb_connection->frontend_state = TARGET_RUNNING;
 379                         }
 380                         break;
 381                 default:
 382                         break;
 383         }
 384
 385         return ERROR_OK;
 386 }
 387
 388 int gdb_new_connection(connection_t *connection)
 389 {
 390         gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
 391         gdb_service_t *gdb_service = connection->service->priv;
 392         int retval;
 393         int initial_ack;
 394
 395         connection->priv = gdb_connection;
 396
 397         /* initialize gdb connection information */
 398         gdb_connection->buf_p = gdb_connection->buffer;
 399         gdb_connection->buf_cnt = 0;
 400         gdb_connection->ctrl_c = 0;
 401         gdb_connection->frontend_state = TARGET_HALTED;
 402         gdb_connection->vflash_image = NULL;
 403
 404         /* output goes through gdb connection */
 405         command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
 406
 407         /* register callback to be informed about target events */
 408         target_register_event_callback(gdb_target_callback_event_handler, connection);
 409
 410         /* a gdb session just attached, put the target in halt mode */
 411         if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) &&
 412                         (retval != ERROR_TARGET_ALREADY_HALTED))
 413         {
 414                 ERROR("error when trying to halt target");
 415                 exit(-1);
 416         }
 417
 418         while (gdb_service->target->state != TARGET_HALTED)
 419         {
 420                 gdb_service->target->type->poll(gdb_service->target);
 421         }
 422
 423         /* remove the initial ACK from the incoming buffer */
 424         if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
 425                 return retval;
 426
 427         if (initial_ack != '+')
 428                 gdb_putback_char(connection, initial_ack);
 429
 430         return ERROR_OK;
 431 }
 432
 433 int gdb_connection_closed(connection_t *connection)
 434 {
 435         gdb_service_t *gdb_service = connection->service->priv;
 436         gdb_connection_t *gdb_connection = connection->priv;
 437
 438         /* see if an image built with vFlash commands is left */
 439         if (gdb_connection->vflash_image)
 440         {
 441                 image_close(gdb_connection->vflash_image);
 442                 free(gdb_connection->vflash_image);
 443                 gdb_connection->vflash_image = NULL;
 444         }
 445
 446         /* if this connection registered a debug-message receiver delete it */
 447         delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
 448
 449         if (connection->priv)
 450                 free(connection->priv);
 451         else
 452                 ERROR("BUG: connection->priv == NULL");
 453
 454         target_unregister_event_callback(gdb_target_callback_event_handler, connection);
 455
 456         return ERROR_OK;
 457 }
 458
 459 void gdb_send_error(connection_t *connection, u8 the_error)
 460 {
 461         char err[4];
 462         snprintf(err, 4, "E%2.2X", the_error );
 463         gdb_put_packet(connection, err, 3);
 464 }
 465
 466 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 467 {
 468         char sig_reply[4];
 469         int signal;
 470
 471         signal = gdb_last_signal(target);
 472
 473         snprintf(sig_reply, 4, "S%2.2x", signal);
 474         gdb_put_packet(connection, sig_reply, 3);
 475
 476         return ERROR_OK;
 477 }
 478
 479 void gdb_str_to_target(target_t *target, char *str, char *tstr)
 480 {
 481         int str_len = strlen(str);
 482         int i;
 483
 484         if (str_len % 2)
 485         {
 486                 ERROR("BUG: gdb value with uneven number of characters encountered: %s", str);
 487                 exit(-1);
 488         }
 489
 490         if (target->endianness == TARGET_LITTLE_ENDIAN)
 491         {
 492                 for (i = 0; i < str_len; i+=2)
 493                 {
 494                         tstr[str_len - i - 1] = str[i + 1];
 495                         tstr[str_len - i - 2] = str[i];
 496                 }
 497         }
 498         else
 499         {
 500                 for (i = 0; i < str_len; i++)
 501                 {
 502                         tstr[i] = str[i];
 503                 }
 504         }
 505 }
 506
 507 void gdb_target_to_str(target_t *target, char *tstr, char *str)
 508 {
 509         int str_len = strlen(tstr);
 510         int i;
 511
 512         if (str_len % 2)
 513         {
 514                 ERROR("BUG: gdb value with uneven number of characters encountered");
 515                 exit(-1);
 516         }
 517
 518         if (target->endianness == TARGET_LITTLE_ENDIAN)
 519         {
 520                 for (i = 0; i < str_len; i+=2)
 521                 {
 522                         str[str_len - i - 1] = tstr[i + 1];
 523                         str[str_len - i - 2] = tstr[i];
 524                 }
 525         }
 526         else
 527         {
 528                 for (i = 0; i < str_len; i++)
 529                 {
 530                         str[i] = tstr[i];
 531                 }
 532         }
 533 }
 534
 535 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 536 {
 537         reg_t **reg_list;
 538         int reg_list_size;
 539         int retval;
 540         int reg_packet_size = 0;
 541         char *reg_packet;
 542         char *reg_packet_p;
 543         int i;
 544
 545         DEBUG("-");
 546
 547         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 548         {
 549                 switch (retval)
 550                 {
 551                         case ERROR_TARGET_NOT_HALTED:
 552                                 ERROR("gdb requested registers but we're not halted, dropping connection");
 553                                 return ERROR_SERVER_REMOTE_CLOSED;
 554                         default:
 555                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 556                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 557                                 exit(-1);
 558                 }
 559         }
 560
 561         for (i = 0; i < reg_list_size; i++)
 562         {
 563                 reg_packet_size += reg_list[i]->size;
 564         }
 565
 566         reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
 567         reg_packet_p = reg_packet;
 568
 569         for (i = 0; i < reg_list_size; i++)
 570         {
 571                 char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16);
 572                 DEBUG("hex_buf: %s", hex_buf);
 573                 gdb_str_to_target(target, hex_buf, reg_packet_p);
 574                 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
 575                 free(hex_buf);
 576         }
 577
 578         reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
 579         DEBUG("reg_packet: %s", reg_packet_p);
 580         free(reg_packet_p);
 581
 582         gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
 583         free(reg_packet);
 584
 585         free(reg_list);
 586
 587         return ERROR_OK;
 588 }
 589
 590 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 591 {
 592         int i;
 593         reg_t **reg_list;
 594         int reg_list_size;
 595         int retval;
 596         char *packet_p;
 597
 598         DEBUG("-");
 599
 600         /* skip command character */
 601         packet++;
 602         packet_size--;
 603
 604         if (packet_size % 2)
 605         {
 606                 WARNING("GDB set_registers packet with uneven characters received, dropping connection");
 607                 return ERROR_SERVER_REMOTE_CLOSED;
 608         }
 609
 610         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 611         {
 612                 switch (retval)
 613                 {
 614                         case ERROR_TARGET_NOT_HALTED:
 615                                 ERROR("gdb tried to registers but we're not halted, dropping connection");
 616                                 return ERROR_SERVER_REMOTE_CLOSED;
 617                         default:
 618                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 619                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 620                                 exit(-1);
 621                 }
 622         }
 623
 624         packet_p = packet;
 625         for (i = 0; i < reg_list_size; i++)
 626         {
 627                 u8 *bin_buf;
 628                 char *hex_buf;
 629                 reg_arch_type_t *arch_type;
 630
 631                 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
 632                 hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2);
 633                 gdb_target_to_str(target, packet_p, hex_buf);
 634
 635                 /* convert hex-string to binary buffer */
 636                 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
 637                 str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);
 638
 639                 /* get register arch_type, and call set method */
 640                 arch_type = register_get_arch_type(reg_list[i]->arch_type);
 641                 if (arch_type == NULL)
 642                 {
 643                         ERROR("BUG: encountered unregistered arch type");
 644                         exit(-1);
 645                 }
 646                 arch_type->set(reg_list[i], bin_buf);
 647
 648                 /* advance packet pointer */
 649                 packet_p += (CEIL(reg_list[i]->size, 8) * 2);
 650
 651                 free(bin_buf);
 652                 free(hex_buf);
 653         }
 654
 655         /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
 656         free(reg_list);
 657
 658         gdb_put_packet(connection, "OK", 2);
 659
 660         return ERROR_OK;
 661 }
 662
 663 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 664 {
 665         char *reg_packet;
 666         int reg_num = strtoul(packet + 1, NULL, 16);
 667         reg_t **reg_list;
 668         int reg_list_size;
 669         int retval;
 670         char *hex_buf;
 671
 672         DEBUG("-");
 673
 674         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 675         {
 676                 switch (retval)
 677                 {
 678                         case ERROR_TARGET_NOT_HALTED:
 679                                 ERROR("gdb requested registers but we're not halted, dropping connection");
 680                                 return ERROR_SERVER_REMOTE_CLOSED;
 681                         default:
 682                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 683                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 684                                 exit(-1);
 685                 }
 686         }
 687
 688         if (reg_list_size <= reg_num)
 689         {
 690                 ERROR("gdb requested a non-existing register");
 691                 exit(-1);
 692         }
 693
 694         reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
 695
 696         hex_buf = buf_to_str(reg_list[reg_num]->value, reg_list[reg_num]->size, 16);
 697
 698         gdb_str_to_target(target, hex_buf, reg_packet);
 699
 700         gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
 701
 702         free(reg_list);
 703         free(reg_packet);
 704         free(hex_buf);
 705
 706         return ERROR_OK;
 707 }
 708
 709 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 710 {
 711         char *separator;
 712         char *hex_buf;
 713         u8 *bin_buf;
 714         int reg_num = strtoul(packet + 1, &separator, 16);
 715         reg_t **reg_list;
 716         int reg_list_size;
 717         int retval;
 718         reg_arch_type_t *arch_type;
 719
 720         DEBUG("-");
 721
 722         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 723         {
 724                 switch (retval)
 725                 {
 726                         case ERROR_TARGET_NOT_HALTED:
 727                                 ERROR("gdb tried to set a register but we're not halted, dropping connection");
 728                                 return ERROR_SERVER_REMOTE_CLOSED;
 729                         default:
 730                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 731                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 732                                 exit(-1);
 733                 }
 734         }
 735
 736         if (reg_list_size < reg_num)
 737         {
 738                 ERROR("gdb requested a non-existing register");
 739                 return ERROR_SERVER_REMOTE_CLOSED;
 740         }
 741
 742         if (*separator != '=')
 743         {
 744                 ERROR("GDB 'set register packet', but no '=' following the register number");
 745                 return ERROR_SERVER_REMOTE_CLOSED;
 746         }
 747
 748         /* convert from GDB-string (target-endian) to hex-string (big-endian) */
 749         hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
 750         gdb_target_to_str(target, separator + 1, hex_buf);
 751
 752         /* convert hex-string to binary buffer */
 753         bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
 754         str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);
 755
 756         /* get register arch_type, and call set method */
 757         arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
 758         if (arch_type == NULL)
 759         {
 760                 ERROR("BUG: encountered unregistered arch type");
 761                 exit(-1);
 762         }
 763         arch_type->set(reg_list[reg_num], bin_buf);
 764
 765         gdb_put_packet(connection, "OK", 2);
 766
 767         free(bin_buf);
 768         free(hex_buf);
 769         free(reg_list);
 770
 771         return ERROR_OK;
 772 }
 773
 774 int gdb_memory_packet_error(connection_t *connection, int retval)
 775 {
 776         switch (retval)
 777         {
 778                 case ERROR_TARGET_NOT_HALTED:
 779                         ERROR("gdb tried to read memory but we're not halted, dropping connection");
 780                         return ERROR_SERVER_REMOTE_CLOSED;
 781                         break;
 782                 case ERROR_TARGET_DATA_ABORT:
 783                         gdb_send_error(connection, EIO);
 784                         break;
 785                 case ERROR_TARGET_TRANSLATION_FAULT:
 786                         gdb_send_error(connection, EFAULT);
 787                         break;
 788                 case ERROR_TARGET_UNALIGNED_ACCESS:
 789                         gdb_send_error(connection, EFAULT);
 790                         break;
 791                 default:
 792                         ERROR("BUG: unexpected error %i", retval);
 793                         exit(-1);
 794         }
 795
 796         return ERROR_OK;
 797 }
 798
 799 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 800 {
 801         char *separator;
 802         u32 addr = 0;
 803         u32 len = 0;
 804
 805         u8 *buffer;
 806         char *hex_buffer;
 807
 808         int i;
 809         int retval;
 810
 811         /* skip command character */
 812         packet++;
 813
 814         addr = strtoul(packet, &separator, 16);
 815
 816         if (*separator != ',')
 817         {
 818                 ERROR("incomplete read memory packet received, dropping connection");
 819                 return ERROR_SERVER_REMOTE_CLOSED;
 820         }
 821
 822         len = strtoul(separator+1, NULL, 16);
 823
 824         buffer = malloc(len);
 825
 826         DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 827
 828         switch (len)
 829         {
 830                 case 4:
 831                         if ((addr % 4) == 0)
 832                                 retval = target->type->read_memory(target, addr, 4, 1, buffer);
 833                         else
 834                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 835                         break;
 836                 case 2:
 837                         if ((addr % 2) == 0)
 838                                 retval = target->type->read_memory(target, addr, 2, 1, buffer);
 839                         else
 840                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 841                         break;
 842                 default:
 843                         if (((addr % 4) == 0) && ((len % 4) == 0))
 844                                 retval = target->type->read_memory(target, addr, 4, len / 4, buffer);
 845                         else
 846                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 847         }
 848
 849         if (retval == ERROR_OK)
 850         {
 851                 hex_buffer = malloc(len * 2 + 1);
 852
 853                 for (i=0; i<len; i++)
 854                         snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]);
 855
 856                 gdb_put_packet(connection, hex_buffer, len * 2);
 857
 858                 free(hex_buffer);
 859         }
 860         else
 861         {
 862                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
 863                         return retval;
 864         }
 865
 866         free(buffer);
 867
 868         return ERROR_OK;
 869 }
 870
 871 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 872 {
 873         char *separator;
 874         u32 addr = 0;
 875         u32 len = 0;
 876
 877         u8 *buffer;
 878
 879         int i;
 880         int retval;
 881
 882         /* skip command character */
 883         packet++;
 884
 885         addr = strtoul(packet, &separator, 16);
 886
 887         if (*separator != ',')
 888         {
 889                 ERROR("incomplete write memory packet received, dropping connection");
 890                 return ERROR_SERVER_REMOTE_CLOSED;
 891         }
 892
 893         len = strtoul(separator+1, &separator, 16);
 894
 895         if (*(separator++) != ':')
 896         {
 897                 ERROR("incomplete write memory packet received, dropping connection");
 898                 return ERROR_SERVER_REMOTE_CLOSED;
 899         }
 900
 901         buffer = malloc(len);
 902
 903         DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 904
 905         for (i=0; i<len; i++)
 906         {
 907                 u32 tmp;
 908                 sscanf(separator + 2*i, "%2x", &tmp);
 909                 buffer[i] = tmp;
 910         }
 911
 912         retval = ERROR_OK;
 913         switch (len)
 914         {
 915                 /* handle sized writes */
 916                 case 4:
 917                         if ((addr % 4) == 0)
 918                                 retval = target->type->write_memory(target, addr, 4, 1, buffer);
 919                         else
 920                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
 921                         break;
 922                 case 2:
 923                         if ((addr % 2) == 0)
 924                                 retval = target->type->write_memory(target, addr, 2, 1, buffer);
 925                         else
 926                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
 927                         break;
 928                 case 3:
 929                 case 1:
 930                         retval = target->type->write_memory(target, addr, 1, len, buffer);
 931                         break;
 932                         /* handle bulk writes */
 933                 default:
 934                         retval = target_write_buffer(target, addr, len, buffer);
 935                         break;
 936         }
 937
 938         if (retval == ERROR_OK)
 939         {
 940                 gdb_put_packet(connection, "OK", 2);
 941         }
 942         else
 943         {
 944                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
 945                         return retval;
 946         }
 947
 948         free(buffer);
 949
 950         return ERROR_OK;
 951 }
 952
 953 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 954 {
 955         char *separator;
 956         u32 addr = 0;
 957         u32 len = 0;
 958
 959         u8 *buffer;
 960         int retval;
 961
 962         /* skip command character */
 963         packet++;
 964
 965         addr = strtoul(packet, &separator, 16);
 966
 967         if (*separator != ',')
 968         {
 969                 ERROR("incomplete write memory binary packet received, dropping connection");
 970                 return ERROR_SERVER_REMOTE_CLOSED;
 971         }
 972
 973         len = strtoul(separator+1, &separator, 16);
 974
 975         if (*(separator++) != ':')
 976         {
 977                 ERROR("incomplete write memory binary packet received, dropping connection");
 978                 return ERROR_SERVER_REMOTE_CLOSED;
 979         }
 980
 981         retval = ERROR_OK;
 982         if( len ) {
 983
 984                 buffer = malloc(len);
 985
 986                 DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 987
 988                 memcpy( buffer, separator, len );
 989
 990                 switch (len)
 991                 {
 992                         case 4:
 993                                 if ((addr % 4) == 0)
 994                                         retval = target->type->write_memory(target, addr, 4, 1, buffer);
 995                                 else
 996                                         retval = target->type->write_memory(target, addr, 1, len, buffer);
 997                                 break;
 998                         case 2:
 999                                 if ((addr % 2) == 0)
1000                                         retval = target->type->write_memory(target, addr, 2, 1, buffer);
1001                                 else
1002                                         retval = target->type->write_memory(target, addr, 1, len, buffer);
1003                                 break;
1004                         case 3:
1005                         case 1:
1006                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
1007                                 break;
1008                         default:
1009                                 retval = target_write_buffer(target, addr, len, buffer);
1010                                 break;
1011                 }
1012
1013                 free(buffer);
1014         }
1015
1016         if (retval == ERROR_OK)
1017         {
1018                 gdb_put_packet(connection, "OK", 2);
1019         }
1020         else
1021         {
1022                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
1023                         return retval;
1024         }
1025
1026         return ERROR_OK;
1027 }
1028
1029 void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1030 {
1031         int current = 0;
1032         u32 address = 0x0;
1033
1034         DEBUG("-");
1035
1036         if (packet_size > 1)
1037         {
1038                 packet[packet_size] = 0;
1039                 address = strtoul(packet + 1, NULL, 16);
1040         }
1041         else
1042         {
1043                 current = 1;
1044         }
1045
1046         if (packet[0] == 'c')
1047         {
1048                 DEBUG("continue");
1049                 target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1050         }
1051         else if (packet[0] == 's')
1052         {
1053                 DEBUG("step");
1054                 target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
1055         }
1056 }
1057
1058 int gdb_bp_wp_packet_error(connection_t *connection, int retval)
1059 {
1060         switch (retval)
1061         {
1062                 case ERROR_TARGET_NOT_HALTED:
1063                         ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection");
1064                         return ERROR_SERVER_REMOTE_CLOSED;
1065                         break;
1066                 case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
1067                         gdb_send_error(connection, EBUSY);
1068                         break;
1069                 default:
1070                         ERROR("BUG: unexpected error %i", retval);
1071                         exit(-1);
1072         }
1073
1074         return ERROR_OK;
1075 }
1076
1077 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1078 {
1079         int type;
1080         enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1081         enum watchpoint_rw wp_type;
1082         u32 address;
1083         u32 size;
1084         char *separator;
1085         int retval;
1086
1087         DEBUG("-");
1088
1089         type = strtoul(packet + 1, &separator, 16);
1090
1091         if (type == 0)  /* memory breakpoint */
1092                 bp_type = BKPT_SOFT;
1093         else if (type == 1) /* hardware breakpoint */
1094                 bp_type = BKPT_HARD;
1095         else if (type == 2) /* write watchpoint */
1096                 wp_type = WPT_WRITE;
1097         else if (type == 3) /* read watchpoint */
1098                 wp_type = WPT_READ;
1099         else if (type == 4) /* access watchpoint */
1100                 wp_type = WPT_ACCESS;
1101
1102         if (*separator != ',')
1103         {
1104                 ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1105                 return ERROR_SERVER_REMOTE_CLOSED;
1106         }
1107
1108         address = strtoul(separator+1, &separator, 16);
1109
1110         if (*separator != ',')
1111         {
1112                 ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1113                 return ERROR_SERVER_REMOTE_CLOSED;
1114         }
1115
1116         size = strtoul(separator+1, &separator, 16);
1117
1118         switch (type)
1119         {
1120                 case 0:
1121                 case 1:
1122                         if (packet[0] == 'Z')
1123                         {
1124                                 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1125                                 {
1126                                         if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
1127                                                 return retval;
1128                                 }
1129                                 else
1130                                 {
1131                                         gdb_put_packet(connection, "OK", 2);
1132                                 }
1133                         }
1134                         else
1135                         {
1136                                 breakpoint_remove(target, address);
1137                                 gdb_put_packet(connection, "OK", 2);
1138                         }
1139                         break;
1140                 case 2:
1141                 case 3:
1142                 case 4:
1143                 {
1144                         if (packet[0] == 'Z')
1145                         {
1146                                 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1147                                 {
1148                                         if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
1149                                                 return retval;
1150                                 }
1151                                 else
1152                                 {
1153                                         gdb_put_packet(connection, "OK", 2);
1154                                 }
1155                         }
1156                         else
1157                         {
1158                                 watchpoint_remove(target, address);
1159                                 gdb_put_packet(connection, "OK", 2);
1160                         }
1161                         break;
1162                 }
1163                 default:
1164                         break;
1165         }
1166
1167         return ERROR_OK;
1168 }
1169
1170 void gdb_query_packet(connection_t *connection, char *packet, int packet_size)
1171 {
1172         command_context_t *cmd_ctx = connection->cmd_ctx;
1173
1174         if (strstr(packet, "qRcmd,"))
1175         {
1176                 if (packet_size > 6)
1177                 {
1178                         char *cmd;
1179                         int i;
1180                         cmd = malloc((packet_size - 6)/2 + 1);
1181                         for (i=0; i < (packet_size - 6)/2; i++)
1182                         {
1183                                 u32 tmp;
1184                                 sscanf(packet + 6 + 2*i, "%2x", &tmp);
1185                                 cmd[i] = tmp;
1186                         }
1187                         cmd[(packet_size - 6)/2] = 0x0;
1188                         command_run_line(cmd_ctx, cmd);
1189                         free(cmd);
1190                 }
1191                 gdb_put_packet(connection, "OK", 2);
1192                 return;
1193         }
1194
1195         gdb_put_packet(connection, "", 0);
1196 }
1197
1198 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1199 {
1200         gdb_connection_t *gdb_connection = connection->priv;
1201         gdb_service_t *gdb_service = connection->service->priv;
1202         int result;
1203
1204         if (strstr(packet, "vFlashErase:"))
1205         {
1206                 unsigned long addr;
1207                 unsigned long length;
1208                 char *parse = packet + 12;
1209                 if (*parse == '\0')
1210                 {
1211                         ERROR("incomplete vFlashErase packet received, dropping connection");
1212                         return ERROR_SERVER_REMOTE_CLOSED;
1213                 }
1214
1215                 addr = strtoul(parse, &parse, 16);
1216
1217                 if (*(parse++) != ',' || *parse == '\0')
1218                 {
1219                         ERROR("incomplete vFlashErase packet received, dropping connection");
1220                         return ERROR_SERVER_REMOTE_CLOSED;
1221                 }
1222
1223                 length = strtoul(parse, &parse, 16);
1224
1225                 if (*parse != '\0')
1226                 {
1227                         ERROR("incomplete vFlashErase packet received, dropping connection");
1228                         return ERROR_SERVER_REMOTE_CLOSED;
1229                 }
1230
1231                 /* perform erase */
1232                 if ((result = flash_erase(gdb_service->target, addr, length)) != ERROR_OK)
1233                 {
1234                         /* GDB doesn't evaluate the actual error number returned,
1235                          * treat a failed erase as an I/O error
1236                          */
1237                         gdb_send_error(connection, EIO);
1238                         ERROR("flash_erase returned %i", result);
1239                 }
1240                 else
1241                         gdb_put_packet(connection, "OK", 2);
1242
1243                 return ERROR_OK;
1244         }
1245
1246         if (strstr(packet, "vFlashWrite:"))
1247         {
1248                 unsigned long addr;
1249                 unsigned long length;
1250                 char *parse = packet + 12;
1251
1252                 if (*parse == '\0')
1253                 {
1254                         ERROR("incomplete vFlashErase packet received, dropping connection");
1255                         return ERROR_SERVER_REMOTE_CLOSED;
1256                 }
1257                 addr = strtoul(parse, &parse, 16);
1258                 if (*(parse++) != ':')
1259                 {
1260                         ERROR("incomplete vFlashErase packet received, dropping connection");
1261                         return ERROR_SERVER_REMOTE_CLOSED;
1262                 }
1263                 length = packet_size - (parse - packet);
1264
1265                 /* create a new image if there isn't already one */
1266                 if (gdb_connection->vflash_image == NULL)
1267                 {
1268                         gdb_connection->vflash_image = malloc(sizeof(image_t));
1269                         image_open(gdb_connection->vflash_image, "", "build");
1270                 }
1271
1272                 /* create new section with content from packet buffer */
1273                 image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse);
1274
1275                 gdb_put_packet(connection, "OK", 2);
1276
1277                 return ERROR_OK;
1278         }
1279
1280         if (!strcmp(packet, "vFlashDone"))
1281         {
1282                 u32 written;
1283                 char *error_str;
1284
1285                 /* process the flashing buffer */
1286                 if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL, 0)) != ERROR_OK)
1287                 {
1288                         if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1289                                 gdb_put_packet(connection, "E.memtype", 9);
1290                         else
1291                                 gdb_send_error(connection, EIO);
1292
1293                         if (error_str)
1294                         {
1295                                 ERROR("flash writing failed: %s", error_str);
1296                                 free(error_str);
1297                         }
1298                 }
1299                 else
1300                 {
1301                         DEBUG("wrote %u bytes from vFlash image to flash", written);
1302                         gdb_put_packet(connection, "OK", 2);
1303                 }
1304
1305                 image_close(gdb_connection->vflash_image);
1306                 free(gdb_connection->vflash_image);
1307                 gdb_connection->vflash_image = NULL;
1308
1309                 return ERROR_OK;
1310         }
1311
1312         gdb_put_packet(connection, "", 0);
1313         return ERROR_OK;
1314 }
1315
1316 int gdb_detach(connection_t *connection, target_t *target)
1317 {
1318         switch( detach_mode )
1319         {
1320                 case GDB_DETACH_RESUME:
1321                         target->type->resume(target, 1, 0, 1, 0);
1322                         break;
1323
1324                 case GDB_DETACH_RESET:
1325                         target_process_reset(connection->cmd_ctx);
1326                         break;
1327
1328                 case GDB_DETACH_HALT:
1329                         target->type->halt(target);
1330                         break;
1331
1332                 case GDB_DETACH_NOTHING:
1333                         break;
1334         }
1335
1336         gdb_put_packet(connection, "OK", 2);
1337
1338         return ERROR_OK;
1339 }
1340
1341 int gdb_input(connection_t *connection)
1342 {
1343         gdb_service_t *gdb_service = connection->service->priv;
1344         target_t *target = gdb_service->target;
1345         char packet[GDB_BUFFER_SIZE];
1346         int packet_size;
1347         int retval;
1348         gdb_connection_t *gdb_con = connection->priv;
1349
1350         /* drain input buffer */
1351         do
1352         {
1353                 packet_size = GDB_BUFFER_SIZE-1;
1354                 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
1355                 {
1356                         switch (retval)
1357                         {
1358                                 case ERROR_GDB_BUFFER_TOO_SMALL:
1359                                         ERROR("BUG: buffer supplied for gdb packet was too small");
1360                                         exit(-1);
1361                                 case ERROR_SERVER_REMOTE_CLOSED:
1362                                         return ERROR_SERVER_REMOTE_CLOSED;
1363                                 default:
1364                                         ERROR("BUG: unexpected error");
1365                                         exit(-1);
1366                         }
1367                 }
1368
1369                 /* terminate with zero */
1370                 packet[packet_size] = 0;
1371
1372                 DEBUG("recevied packet: '%s'", packet);
1373
1374                 if (packet_size > 0)
1375                 {
1376                         retval = ERROR_OK;
1377                         switch (packet[0])
1378                         {
1379                                 case 'H':
1380                                         /* Hct... -- set thread
1381                                          * we don't have threads, send empty reply */
1382                                         gdb_put_packet(connection, NULL, 0);
1383                                         break;
1384                                 case 'q':
1385                                         gdb_query_packet(connection, packet, packet_size);
1386                                         break;
1387                                 case 'g':
1388                                         retval = gdb_get_registers_packet(connection, target, packet, packet_size);
1389                                         break;
1390                                 case 'G':
1391                                         retval = gdb_set_registers_packet(connection, target, packet, packet_size);
1392                                         break;
1393                                 case 'p':
1394                                         retval = gdb_get_register_packet(connection, target, packet, packet_size);
1395                                         break;
1396                                 case 'P':
1397                                         retval = gdb_set_register_packet(connection, target, packet, packet_size);
1398                                         break;
1399                                 case 'm':
1400                                         retval = gdb_read_memory_packet(connection, target, packet, packet_size);
1401                                         break;
1402                                 case 'M':
1403                                         retval = gdb_write_memory_packet(connection, target, packet, packet_size);
1404                                         break;
1405                                 case 'z':
1406                                 case 'Z':
1407                                         retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
1408                                         break;
1409                                 case '?':
1410                                         gdb_last_signal_packet(connection, target, packet, packet_size);
1411                                         break;
1412                                 case 'c':
1413                                 case 's':
1414                                         gdb_step_continue_packet(connection, target, packet, packet_size);
1415                                         break;
1416                                 case 'v':
1417                                         retval = gdb_v_packet(connection, target, packet, packet_size);
1418                                         break;
1419                                 case 'D':
1420                                         retval = gdb_detach(connection, target);
1421                                         break;
1422                                 case 'X':
1423                                         if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
1424                                                 return retval;
1425                                         break;
1426                                 case 'k':
1427                                         gdb_put_packet(connection, "OK", 2);
1428                                         return ERROR_SERVER_REMOTE_CLOSED;
1429                                 default:
1430                                         /* ignore unkown packets */
1431                                         DEBUG("ignoring 0x%2.2x packet", packet[0]);
1432                                         gdb_put_packet(connection, NULL, 0);
1433                                         break;
1434                         }
1435
1436                         /* if a packet handler returned an error, exit input loop */
1437                         if (retval != ERROR_OK)
1438                                 return retval;
1439                 }
1440
1441                 if (gdb_con->ctrl_c)
1442                 {
1443                         if (target->state == TARGET_RUNNING)
1444                         {
1445                                 target->type->halt(target);
1446                                 gdb_con->ctrl_c = 0;
1447                         }
1448                 }
1449
1450         } while (gdb_con->buf_cnt > 0);
1451
1452         return ERROR_OK;
1453 }
1454
1455 int gdb_init()
1456 {
1457         gdb_service_t *gdb_service;
1458         target_t *target = targets;
1459         int i = 0;
1460
1461         if (!target)
1462         {
1463                 WARNING("no gdb ports allocated as no target has been specified");
1464                 return ERROR_OK;
1465         }
1466
1467         if (gdb_port == 0)
1468         {
1469                 WARNING("no gdb port specified, using default port 3333");
1470                 gdb_port = 3333;
1471         }
1472
1473         while (target)
1474         {
1475                 char service_name[8];
1476
1477                 snprintf(service_name, 8, "gdb-%2.2i", i);
1478
1479                 gdb_service = malloc(sizeof(gdb_service_t));
1480                 gdb_service->target = target;
1481
1482                 add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
1483
1484                 DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);
1485
1486                 i++;
1487                 target = target->next;
1488         }
1489
1490         return ERROR_OK;
1491 }
1492
1493 /* daemon configuration command gdb_port */
1494 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1495 {
1496         if (argc == 0)
1497                 return ERROR_OK;
1498
1499         /* only if the port wasn't overwritten by cmdline */
1500         if (gdb_port == 0)
1501                 gdb_port = strtoul(args[0], NULL, 0);
1502
1503         return ERROR_OK;
1504 }
1505
1506 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1507 {
1508         if (argc == 1)
1509         {
1510                 if (strcmp(args[0], "resume") == 0)
1511                 {
1512                         detach_mode = GDB_DETACH_RESUME;
1513                         return ERROR_OK;
1514                 }
1515                 else if (strcmp(args[0], "reset") == 0)
1516                 {
1517                         detach_mode = GDB_DETACH_RESET;
1518                         return ERROR_OK;
1519                 }
1520                 else if (strcmp(args[0], "halt") == 0)
1521                 {
1522                         detach_mode = GDB_DETACH_HALT;
1523                         return ERROR_OK;
1524                 }
1525                 else if (strcmp(args[0], "nothing") == 0)
1526                 {
1527                         detach_mode = GDB_DETACH_NOTHING;
1528                         return ERROR_OK;
1529                 }
1530         }
1531
1532         WARNING("invalid gdb_detach configuration directive: %s", args[0]);
1533         return ERROR_OK;
1534 }
1535
1536 int gdb_register_commands(command_context_t *command_context)
1537 {
1538         register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
1539                         COMMAND_CONFIG, "");
1540         register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
1541                         COMMAND_CONFIG, "");
1542
1543         return ERROR_OK;
1544 }