git.sur5r.net Git - openocd/blob - src/server/gdb_server.c

   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         {
 451                 free(connection->priv);
 452                 connection->priv = NULL;
 453         }
 454         else
 455         {
 456                 ERROR("BUG: connection->priv == NULL");
 457         }
 458
 459         target_unregister_event_callback(gdb_target_callback_event_handler, connection);
 460
 461         return ERROR_OK;
 462 }
 463
 464 void gdb_send_error(connection_t *connection, u8 the_error)
 465 {
 466         char err[4];
 467         snprintf(err, 4, "E%2.2X", the_error );
 468         gdb_put_packet(connection, err, 3);
 469 }
 470
 471 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 472 {
 473         char sig_reply[4];
 474         int signal;
 475
 476         signal = gdb_last_signal(target);
 477
 478         snprintf(sig_reply, 4, "S%2.2x", signal);
 479         gdb_put_packet(connection, sig_reply, 3);
 480
 481         return ERROR_OK;
 482 }
 483
 484 void gdb_str_to_target(target_t *target, char *str, char *tstr)
 485 {
 486         int str_len = strlen(str);
 487         int i;
 488
 489         if (str_len % 2)
 490         {
 491                 ERROR("BUG: gdb value with uneven number of characters encountered: %s", str);
 492                 exit(-1);
 493         }
 494
 495         if (target->endianness == TARGET_LITTLE_ENDIAN)
 496         {
 497                 for (i = 0; i < str_len; i+=2)
 498                 {
 499                         tstr[str_len - i - 1] = str[i + 1];
 500                         tstr[str_len - i - 2] = str[i];
 501                 }
 502         }
 503         else
 504         {
 505                 for (i = 0; i < str_len; i++)
 506                 {
 507                         tstr[i] = str[i];
 508                 }
 509         }
 510 }
 511
 512 void gdb_target_to_str(target_t *target, char *tstr, char *str)
 513 {
 514         int str_len = strlen(tstr);
 515         int i;
 516
 517         if (str_len % 2)
 518         {
 519                 ERROR("BUG: gdb value with uneven number of characters encountered");
 520                 exit(-1);
 521         }
 522
 523         if (target->endianness == TARGET_LITTLE_ENDIAN)
 524         {
 525                 for (i = 0; i < str_len; i+=2)
 526                 {
 527                         str[str_len - i - 1] = tstr[i + 1];
 528                         str[str_len - i - 2] = tstr[i];
 529                 }
 530         }
 531         else
 532         {
 533                 for (i = 0; i < str_len; i++)
 534                 {
 535                         str[i] = tstr[i];
 536                 }
 537         }
 538 }
 539
 540 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 541 {
 542         reg_t **reg_list;
 543         int reg_list_size;
 544         int retval;
 545         int reg_packet_size = 0;
 546         char *reg_packet;
 547         char *reg_packet_p;
 548         int i;
 549
 550         DEBUG("-");
 551
 552         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 553         {
 554                 switch (retval)
 555                 {
 556                         case ERROR_TARGET_NOT_HALTED:
 557                                 ERROR("gdb requested registers but we're not halted, dropping connection");
 558                                 return ERROR_SERVER_REMOTE_CLOSED;
 559                         default:
 560                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 561                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 562                                 exit(-1);
 563                 }
 564         }
 565
 566         for (i = 0; i < reg_list_size; i++)
 567         {
 568                 reg_packet_size += reg_list[i]->size;
 569         }
 570
 571         reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
 572         reg_packet_p = reg_packet;
 573
 574         for (i = 0; i < reg_list_size; i++)
 575         {
 576                 char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16);
 577                 DEBUG("hex_buf: %s", hex_buf);
 578                 gdb_str_to_target(target, hex_buf, reg_packet_p);
 579                 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
 580                 free(hex_buf);
 581         }
 582
 583         reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
 584         DEBUG("reg_packet: %s", reg_packet_p);
 585         free(reg_packet_p);
 586
 587         gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
 588         free(reg_packet);
 589
 590         free(reg_list);
 591
 592         return ERROR_OK;
 593 }
 594
 595 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 596 {
 597         int i;
 598         reg_t **reg_list;
 599         int reg_list_size;
 600         int retval;
 601         char *packet_p;
 602
 603         DEBUG("-");
 604
 605         /* skip command character */
 606         packet++;
 607         packet_size--;
 608
 609         if (packet_size % 2)
 610         {
 611                 WARNING("GDB set_registers packet with uneven characters received, dropping connection");
 612                 return ERROR_SERVER_REMOTE_CLOSED;
 613         }
 614
 615         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 616         {
 617                 switch (retval)
 618                 {
 619                         case ERROR_TARGET_NOT_HALTED:
 620                                 ERROR("gdb tried to registers but we're not halted, dropping connection");
 621                                 return ERROR_SERVER_REMOTE_CLOSED;
 622                         default:
 623                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 624                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 625                                 exit(-1);
 626                 }
 627         }
 628
 629         packet_p = packet;
 630         for (i = 0; i < reg_list_size; i++)
 631         {
 632                 u8 *bin_buf;
 633                 char *hex_buf;
 634                 reg_arch_type_t *arch_type;
 635
 636                 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
 637                 hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2);
 638                 gdb_target_to_str(target, packet_p, hex_buf);
 639
 640                 /* convert hex-string to binary buffer */
 641                 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
 642                 str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);
 643
 644                 /* get register arch_type, and call set method */
 645                 arch_type = register_get_arch_type(reg_list[i]->arch_type);
 646                 if (arch_type == NULL)
 647                 {
 648                         ERROR("BUG: encountered unregistered arch type");
 649                         exit(-1);
 650                 }
 651                 arch_type->set(reg_list[i], bin_buf);
 652
 653                 /* advance packet pointer */
 654                 packet_p += (CEIL(reg_list[i]->size, 8) * 2);
 655
 656                 free(bin_buf);
 657                 free(hex_buf);
 658         }
 659
 660         /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
 661         free(reg_list);
 662
 663         gdb_put_packet(connection, "OK", 2);
 664
 665         return ERROR_OK;
 666 }
 667
 668 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 669 {
 670         char *reg_packet;
 671         int reg_num = strtoul(packet + 1, NULL, 16);
 672         reg_t **reg_list;
 673         int reg_list_size;
 674         int retval;
 675         char *hex_buf;
 676
 677         DEBUG("-");
 678
 679         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 680         {
 681                 switch (retval)
 682                 {
 683                         case ERROR_TARGET_NOT_HALTED:
 684                                 ERROR("gdb requested registers but we're not halted, dropping connection");
 685                                 return ERROR_SERVER_REMOTE_CLOSED;
 686                         default:
 687                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 688                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 689                                 exit(-1);
 690                 }
 691         }
 692
 693         if (reg_list_size <= reg_num)
 694         {
 695                 ERROR("gdb requested a non-existing register");
 696                 exit(-1);
 697         }
 698
 699         reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
 700
 701         hex_buf = buf_to_str(reg_list[reg_num]->value, reg_list[reg_num]->size, 16);
 702
 703         gdb_str_to_target(target, hex_buf, reg_packet);
 704
 705         gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
 706
 707         free(reg_list);
 708         free(reg_packet);
 709         free(hex_buf);
 710
 711         return ERROR_OK;
 712 }
 713
 714 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 715 {
 716         char *separator;
 717         char *hex_buf;
 718         u8 *bin_buf;
 719         int reg_num = strtoul(packet + 1, &separator, 16);
 720         reg_t **reg_list;
 721         int reg_list_size;
 722         int retval;
 723         reg_arch_type_t *arch_type;
 724
 725         DEBUG("-");
 726
 727         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 728         {
 729                 switch (retval)
 730                 {
 731                         case ERROR_TARGET_NOT_HALTED:
 732                                 ERROR("gdb tried to set a register but we're not halted, dropping connection");
 733                                 return ERROR_SERVER_REMOTE_CLOSED;
 734                         default:
 735                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 736                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 737                                 exit(-1);
 738                 }
 739         }
 740
 741         if (reg_list_size < reg_num)
 742         {
 743                 ERROR("gdb requested a non-existing register");
 744                 return ERROR_SERVER_REMOTE_CLOSED;
 745         }
 746
 747         if (*separator != '=')
 748         {
 749                 ERROR("GDB 'set register packet', but no '=' following the register number");
 750                 return ERROR_SERVER_REMOTE_CLOSED;
 751         }
 752
 753         /* convert from GDB-string (target-endian) to hex-string (big-endian) */
 754         hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
 755         gdb_target_to_str(target, separator + 1, hex_buf);
 756
 757         /* convert hex-string to binary buffer */
 758         bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
 759         str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);
 760
 761         /* get register arch_type, and call set method */
 762         arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
 763         if (arch_type == NULL)
 764         {
 765                 ERROR("BUG: encountered unregistered arch type");
 766                 exit(-1);
 767         }
 768         arch_type->set(reg_list[reg_num], bin_buf);
 769
 770         gdb_put_packet(connection, "OK", 2);
 771
 772         free(bin_buf);
 773         free(hex_buf);
 774         free(reg_list);
 775
 776         return ERROR_OK;
 777 }
 778
 779 int gdb_memory_packet_error(connection_t *connection, int retval)
 780 {
 781         switch (retval)
 782         {
 783                 case ERROR_TARGET_NOT_HALTED:
 784                         ERROR("gdb tried to read memory but we're not halted, dropping connection");
 785                         return ERROR_SERVER_REMOTE_CLOSED;
 786                         break;
 787                 case ERROR_TARGET_DATA_ABORT:
 788                         gdb_send_error(connection, EIO);
 789                         break;
 790                 case ERROR_TARGET_TRANSLATION_FAULT:
 791                         gdb_send_error(connection, EFAULT);
 792                         break;
 793                 case ERROR_TARGET_UNALIGNED_ACCESS:
 794                         gdb_send_error(connection, EFAULT);
 795                         break;
 796                 default:
 797                         ERROR("BUG: unexpected error %i", retval);
 798                         exit(-1);
 799         }
 800
 801         return ERROR_OK;
 802 }
 803
 804 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 805 {
 806         char *separator;
 807         u32 addr = 0;
 808         u32 len = 0;
 809
 810         u8 *buffer;
 811         char *hex_buffer;
 812
 813         int i;
 814         int retval;
 815
 816         /* skip command character */
 817         packet++;
 818
 819         addr = strtoul(packet, &separator, 16);
 820
 821         if (*separator != ',')
 822         {
 823                 ERROR("incomplete read memory packet received, dropping connection");
 824                 return ERROR_SERVER_REMOTE_CLOSED;
 825         }
 826
 827         len = strtoul(separator+1, NULL, 16);
 828
 829         buffer = malloc(len);
 830
 831         DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 832
 833         switch (len)
 834         {
 835                 case 4:
 836                         if ((addr % 4) == 0)
 837                                 retval = target->type->read_memory(target, addr, 4, 1, buffer);
 838                         else
 839                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 840                         break;
 841                 case 2:
 842                         if ((addr % 2) == 0)
 843                                 retval = target->type->read_memory(target, addr, 2, 1, buffer);
 844                         else
 845                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 846                         break;
 847                 default:
 848                         if (((addr % 4) == 0) && ((len % 4) == 0))
 849                                 retval = target->type->read_memory(target, addr, 4, len / 4, buffer);
 850                         else
 851                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 852         }
 853
 854         if (retval == ERROR_OK)
 855         {
 856                 hex_buffer = malloc(len * 2 + 1);
 857
 858                 for (i=0; i<len; i++)
 859                         snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]);
 860
 861                 gdb_put_packet(connection, hex_buffer, len * 2);
 862
 863                 free(hex_buffer);
 864         }
 865         else
 866         {
 867                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
 868                         return retval;
 869         }
 870
 871         free(buffer);
 872
 873         return ERROR_OK;
 874 }
 875
 876 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 877 {
 878         char *separator;
 879         u32 addr = 0;
 880         u32 len = 0;
 881
 882         u8 *buffer;
 883
 884         int i;
 885         int retval;
 886
 887         /* skip command character */
 888         packet++;
 889
 890         addr = strtoul(packet, &separator, 16);
 891
 892         if (*separator != ',')
 893         {
 894                 ERROR("incomplete write memory packet received, dropping connection");
 895                 return ERROR_SERVER_REMOTE_CLOSED;
 896         }
 897
 898         len = strtoul(separator+1, &separator, 16);
 899
 900         if (*(separator++) != ':')
 901         {
 902                 ERROR("incomplete write memory packet received, dropping connection");
 903                 return ERROR_SERVER_REMOTE_CLOSED;
 904         }
 905
 906         buffer = malloc(len);
 907
 908         DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 909
 910         for (i=0; i<len; i++)
 911         {
 912                 u32 tmp;
 913                 sscanf(separator + 2*i, "%2x", &tmp);
 914                 buffer[i] = tmp;
 915         }
 916
 917         retval = ERROR_OK;
 918         switch (len)
 919         {
 920                 /* handle sized writes */
 921                 case 4:
 922                         if ((addr % 4) == 0)
 923                                 retval = target->type->write_memory(target, addr, 4, 1, buffer);
 924                         else
 925                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
 926                         break;
 927                 case 2:
 928                         if ((addr % 2) == 0)
 929                                 retval = target->type->write_memory(target, addr, 2, 1, buffer);
 930                         else
 931                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
 932                         break;
 933                 case 3:
 934                 case 1:
 935                         retval = target->type->write_memory(target, addr, 1, len, buffer);
 936                         break;
 937                         /* handle bulk writes */
 938                 default:
 939                         retval = target_write_buffer(target, addr, len, buffer);
 940                         break;
 941         }
 942
 943         if (retval == ERROR_OK)
 944         {
 945                 gdb_put_packet(connection, "OK", 2);
 946         }
 947         else
 948         {
 949                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
 950                         return retval;
 951         }
 952
 953         free(buffer);
 954
 955         return ERROR_OK;
 956 }
 957
 958 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 959 {
 960         char *separator;
 961         u32 addr = 0;
 962         u32 len = 0;
 963
 964         u8 *buffer;
 965         int retval;
 966
 967         /* skip command character */
 968         packet++;
 969
 970         addr = strtoul(packet, &separator, 16);
 971
 972         if (*separator != ',')
 973         {
 974                 ERROR("incomplete write memory binary packet received, dropping connection");
 975                 return ERROR_SERVER_REMOTE_CLOSED;
 976         }
 977
 978         len = strtoul(separator+1, &separator, 16);
 979
 980         if (*(separator++) != ':')
 981         {
 982                 ERROR("incomplete write memory binary packet received, dropping connection");
 983                 return ERROR_SERVER_REMOTE_CLOSED;
 984         }
 985
 986         retval = ERROR_OK;
 987         if( len ) {
 988
 989                 buffer = malloc(len);
 990
 991                 DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 992
 993                 memcpy( buffer, separator, len );
 994
 995                 switch (len)
 996                 {
 997                         case 4:
 998                                 if ((addr % 4) == 0)
 999                                         retval = target->type->write_memory(target, addr, 4, 1, buffer);
1000                                 else
1001                                         retval = target->type->write_memory(target, addr, 1, len, buffer);
1002                                 break;
1003                         case 2:
1004                                 if ((addr % 2) == 0)
1005                                         retval = target->type->write_memory(target, addr, 2, 1, buffer);
1006                                 else
1007                                         retval = target->type->write_memory(target, addr, 1, len, buffer);
1008                                 break;
1009                         case 3:
1010                         case 1:
1011                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
1012                                 break;
1013                         default:
1014                                 retval = target_write_buffer(target, addr, len, buffer);
1015                                 break;
1016                 }
1017
1018                 free(buffer);
1019         }
1020
1021         if (retval == ERROR_OK)
1022         {
1023                 gdb_put_packet(connection, "OK", 2);
1024         }
1025         else
1026         {
1027                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
1028                         return retval;
1029         }
1030
1031         return ERROR_OK;
1032 }
1033
1034 void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1035 {
1036         int current = 0;
1037         u32 address = 0x0;
1038
1039         DEBUG("-");
1040
1041         if (packet_size > 1)
1042         {
1043                 packet[packet_size] = 0;
1044                 address = strtoul(packet + 1, NULL, 16);
1045         }
1046         else
1047         {
1048                 current = 1;
1049         }
1050
1051         if (packet[0] == 'c')
1052         {
1053                 DEBUG("continue");
1054                 target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1055         }
1056         else if (packet[0] == 's')
1057         {
1058                 DEBUG("step");
1059                 target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
1060         }
1061 }
1062
1063 int gdb_bp_wp_packet_error(connection_t *connection, int retval)
1064 {
1065         switch (retval)
1066         {
1067                 case ERROR_TARGET_NOT_HALTED:
1068                         ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection");
1069                         return ERROR_SERVER_REMOTE_CLOSED;
1070                         break;
1071                 case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
1072                         gdb_send_error(connection, EBUSY);
1073                         break;
1074                 default:
1075                         ERROR("BUG: unexpected error %i", retval);
1076                         exit(-1);
1077         }
1078
1079         return ERROR_OK;
1080 }
1081
1082 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1083 {
1084         int type;
1085         enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1086         enum watchpoint_rw wp_type;
1087         u32 address;
1088         u32 size;
1089         char *separator;
1090         int retval;
1091
1092         DEBUG("-");
1093
1094         type = strtoul(packet + 1, &separator, 16);
1095
1096         if (type == 0)  /* memory breakpoint */
1097                 bp_type = BKPT_SOFT;
1098         else if (type == 1) /* hardware breakpoint */
1099                 bp_type = BKPT_HARD;
1100         else if (type == 2) /* write watchpoint */
1101                 wp_type = WPT_WRITE;
1102         else if (type == 3) /* read watchpoint */
1103                 wp_type = WPT_READ;
1104         else if (type == 4) /* access watchpoint */
1105                 wp_type = WPT_ACCESS;
1106
1107         if (*separator != ',')
1108         {
1109                 ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1110                 return ERROR_SERVER_REMOTE_CLOSED;
1111         }
1112
1113         address = strtoul(separator+1, &separator, 16);
1114
1115         if (*separator != ',')
1116         {
1117                 ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1118                 return ERROR_SERVER_REMOTE_CLOSED;
1119         }
1120
1121         size = strtoul(separator+1, &separator, 16);
1122
1123         switch (type)
1124         {
1125                 case 0:
1126                 case 1:
1127                         if (packet[0] == 'Z')
1128                         {
1129                                 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1130                                 {
1131                                         if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
1132                                                 return retval;
1133                                 }
1134                                 else
1135                                 {
1136                                         gdb_put_packet(connection, "OK", 2);
1137                                 }
1138                         }
1139                         else
1140                         {
1141                                 breakpoint_remove(target, address);
1142                                 gdb_put_packet(connection, "OK", 2);
1143                         }
1144                         break;
1145                 case 2:
1146                 case 3:
1147                 case 4:
1148                 {
1149                         if (packet[0] == 'Z')
1150                         {
1151                                 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1152                                 {
1153                                         if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
1154                                                 return retval;
1155                                 }
1156                                 else
1157                                 {
1158                                         gdb_put_packet(connection, "OK", 2);
1159                                 }
1160                         }
1161                         else
1162                         {
1163                                 watchpoint_remove(target, address);
1164                                 gdb_put_packet(connection, "OK", 2);
1165                         }
1166                         break;
1167                 }
1168                 default:
1169                         break;
1170         }
1171
1172         return ERROR_OK;
1173 }
1174
1175 int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1176 {
1177         command_context_t *cmd_ctx = connection->cmd_ctx;
1178
1179         if (strstr(packet, "qRcmd,"))
1180         {
1181                 if (packet_size > 6)
1182                 {
1183                         char *cmd;
1184                         int i;
1185                         cmd = malloc((packet_size - 6)/2 + 1);
1186                         for (i=0; i < (packet_size - 6)/2; i++)
1187                         {
1188                                 u32 tmp;
1189                                 sscanf(packet + 6 + 2*i, "%2x", &tmp);
1190                                 cmd[i] = tmp;
1191                         }
1192                         cmd[(packet_size - 6)/2] = 0x0;
1193                         command_run_line(cmd_ctx, cmd);
1194                         free(cmd);
1195                 }
1196                 gdb_put_packet(connection, "OK", 2);
1197                 return ERROR_OK;
1198         }
1199
1200         if (strstr(packet, "qCRC:"))
1201         {
1202                 if (packet_size > 5)
1203                 {
1204                         int retval;
1205                         u8 gdb_reply[9];
1206                         char *separator;
1207                         u32 checksum;
1208                         u32 addr = 0;
1209                         u32 len = 0;
1210
1211                         /* skip command character */
1212                         packet += 5;
1213
1214                         addr = strtoul(packet, &separator, 16);
1215
1216                         if (*separator != ',')
1217                         {
1218                                 ERROR("incomplete read memory packet received, dropping connection");
1219                                 return ERROR_SERVER_REMOTE_CLOSED;
1220                         }
1221
1222                         len = strtoul(separator+1, NULL, 16);
1223
1224                         retval = target_checksum_memory(target, addr, len, &checksum);
1225
1226                         if (retval == ERROR_OK)
1227                         {
1228                                 snprintf(gdb_reply, 9, "C%2.2x", checksum);
1229                                 gdb_put_packet(connection, gdb_reply, 9);
1230                         }
1231                         else
1232                         {
1233                                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
1234                                         return retval;
1235                         }
1236
1237                         return ERROR_OK;
1238                 }
1239         }
1240
1241         gdb_put_packet(connection, "", 0);
1242         return ERROR_OK;
1243 }
1244
1245 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1246 {
1247         gdb_connection_t *gdb_connection = connection->priv;
1248         gdb_service_t *gdb_service = connection->service->priv;
1249         int result;
1250
1251         if (strstr(packet, "vFlashErase:"))
1252         {
1253                 unsigned long addr;
1254                 unsigned long length;
1255                 char *parse = packet + 12;
1256                 if (*parse == '\0')
1257                 {
1258                         ERROR("incomplete vFlashErase packet received, dropping connection");
1259                         return ERROR_SERVER_REMOTE_CLOSED;
1260                 }
1261
1262                 addr = strtoul(parse, &parse, 16);
1263
1264                 if (*(parse++) != ',' || *parse == '\0')
1265                 {
1266                         ERROR("incomplete vFlashErase packet received, dropping connection");
1267                         return ERROR_SERVER_REMOTE_CLOSED;
1268                 }
1269
1270                 length = strtoul(parse, &parse, 16);
1271
1272                 if (*parse != '\0')
1273                 {
1274                         ERROR("incomplete vFlashErase packet received, dropping connection");
1275                         return ERROR_SERVER_REMOTE_CLOSED;
1276                 }
1277
1278                 /* perform erase */
1279                 if ((result = flash_erase(gdb_service->target, addr, length)) != ERROR_OK)
1280                 {
1281                         /* GDB doesn't evaluate the actual error number returned,
1282                          * treat a failed erase as an I/O error
1283                          */
1284                         gdb_send_error(connection, EIO);
1285                         ERROR("flash_erase returned %i", result);
1286                 }
1287                 else
1288                         gdb_put_packet(connection, "OK", 2);
1289
1290                 return ERROR_OK;
1291         }
1292
1293         if (strstr(packet, "vFlashWrite:"))
1294         {
1295                 unsigned long addr;
1296                 unsigned long length;
1297                 char *parse = packet + 12;
1298
1299                 if (*parse == '\0')
1300                 {
1301                         ERROR("incomplete vFlashErase packet received, dropping connection");
1302                         return ERROR_SERVER_REMOTE_CLOSED;
1303                 }
1304                 addr = strtoul(parse, &parse, 16);
1305                 if (*(parse++) != ':')
1306                 {
1307                         ERROR("incomplete vFlashErase packet received, dropping connection");
1308                         return ERROR_SERVER_REMOTE_CLOSED;
1309                 }
1310                 length = packet_size - (parse - packet);
1311
1312                 /* create a new image if there isn't already one */
1313                 if (gdb_connection->vflash_image == NULL)
1314                 {
1315                         gdb_connection->vflash_image = malloc(sizeof(image_t));
1316                         image_open(gdb_connection->vflash_image, "", "build");
1317                 }
1318
1319                 /* create new section with content from packet buffer */
1320                 image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse);
1321
1322                 gdb_put_packet(connection, "OK", 2);
1323
1324                 return ERROR_OK;
1325         }
1326
1327         if (!strcmp(packet, "vFlashDone"))
1328         {
1329                 u32 written;
1330                 char *error_str;
1331
1332                 /* process the flashing buffer */
1333                 if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL, 0)) != ERROR_OK)
1334                 {
1335                         if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1336                                 gdb_put_packet(connection, "E.memtype", 9);
1337                         else
1338                                 gdb_send_error(connection, EIO);
1339
1340                         if (error_str)
1341                         {
1342                                 ERROR("flash writing failed: %s", error_str);
1343                                 free(error_str);
1344                         }
1345                 }
1346                 else
1347                 {
1348                         DEBUG("wrote %u bytes from vFlash image to flash", written);
1349                         gdb_put_packet(connection, "OK", 2);
1350                 }
1351
1352                 image_close(gdb_connection->vflash_image);
1353                 free(gdb_connection->vflash_image);
1354                 gdb_connection->vflash_image = NULL;
1355
1356                 return ERROR_OK;
1357         }
1358
1359         gdb_put_packet(connection, "", 0);
1360         return ERROR_OK;
1361 }
1362
1363 int gdb_detach(connection_t *connection, target_t *target)
1364 {
1365         switch( detach_mode )
1366         {
1367                 case GDB_DETACH_RESUME:
1368                         target->type->resume(target, 1, 0, 1, 0);
1369                         break;
1370
1371                 case GDB_DETACH_RESET:
1372                         target_process_reset(connection->cmd_ctx);
1373                         break;
1374
1375                 case GDB_DETACH_HALT:
1376                         target->type->halt(target);
1377                         break;
1378
1379                 case GDB_DETACH_NOTHING:
1380                         break;
1381         }
1382
1383         gdb_put_packet(connection, "OK", 2);
1384
1385         return ERROR_OK;
1386 }
1387
1388 int gdb_input(connection_t *connection)
1389 {
1390         gdb_service_t *gdb_service = connection->service->priv;
1391         target_t *target = gdb_service->target;
1392         char packet[GDB_BUFFER_SIZE];
1393         int packet_size;
1394         int retval;
1395         gdb_connection_t *gdb_con = connection->priv;
1396
1397         /* drain input buffer */
1398         do
1399         {
1400                 packet_size = GDB_BUFFER_SIZE-1;
1401                 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
1402                 {
1403                         switch (retval)
1404                         {
1405                                 case ERROR_GDB_BUFFER_TOO_SMALL:
1406                                         ERROR("BUG: buffer supplied for gdb packet was too small");
1407                                         exit(-1);
1408                                 case ERROR_SERVER_REMOTE_CLOSED:
1409                                         return ERROR_SERVER_REMOTE_CLOSED;
1410                                 default:
1411                                         ERROR("BUG: unexpected error");
1412                                         exit(-1);
1413                         }
1414                 }
1415
1416                 /* terminate with zero */
1417                 packet[packet_size] = 0;
1418
1419                 DEBUG("received packet: '%s'", packet);
1420
1421                 if (packet_size > 0)
1422                 {
1423                         retval = ERROR_OK;
1424                         switch (packet[0])
1425                         {
1426                                 case 'H':
1427                                         /* Hct... -- set thread
1428                                          * we don't have threads, send empty reply */
1429                                         gdb_put_packet(connection, NULL, 0);
1430                                         break;
1431                                 case 'q':
1432                                         retval = gdb_query_packet(connection, target, packet, packet_size);
1433                                         break;
1434                                 case 'g':
1435                                         retval = gdb_get_registers_packet(connection, target, packet, packet_size);
1436                                         break;
1437                                 case 'G':
1438                                         retval = gdb_set_registers_packet(connection, target, packet, packet_size);
1439                                         break;
1440                                 case 'p':
1441                                         retval = gdb_get_register_packet(connection, target, packet, packet_size);
1442                                         break;
1443                                 case 'P':
1444                                         retval = gdb_set_register_packet(connection, target, packet, packet_size);
1445                                         break;
1446                                 case 'm':
1447                                         retval = gdb_read_memory_packet(connection, target, packet, packet_size);
1448                                         break;
1449                                 case 'M':
1450                                         retval = gdb_write_memory_packet(connection, target, packet, packet_size);
1451                                         break;
1452                                 case 'z':
1453                                 case 'Z':
1454                                         retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
1455                                         break;
1456                                 case '?':
1457                                         gdb_last_signal_packet(connection, target, packet, packet_size);
1458                                         break;
1459                                 case 'c':
1460                                 case 's':
1461                                         gdb_step_continue_packet(connection, target, packet, packet_size);
1462                                         break;
1463                                 case 'v':
1464                                         retval = gdb_v_packet(connection, target, packet, packet_size);
1465                                         break;
1466                                 case 'D':
1467                                         retval = gdb_detach(connection, target);
1468                                         break;
1469                                 case 'X':
1470                                         if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
1471                                                 return retval;
1472                                         break;
1473                                 case 'k':
1474                                         gdb_put_packet(connection, "OK", 2);
1475                                         return ERROR_SERVER_REMOTE_CLOSED;
1476                                 default:
1477                                         /* ignore unkown packets */
1478                                         DEBUG("ignoring 0x%2.2x packet", packet[0]);
1479                                         gdb_put_packet(connection, NULL, 0);
1480                                         break;
1481                         }
1482
1483                         /* if a packet handler returned an error, exit input loop */
1484                         if (retval != ERROR_OK)
1485                                 return retval;
1486                 }
1487
1488                 if (gdb_con->ctrl_c)
1489                 {
1490                         if (target->state == TARGET_RUNNING)
1491                         {
1492                                 target->type->halt(target);
1493                                 gdb_con->ctrl_c = 0;
1494                         }
1495                 }
1496
1497         } while (gdb_con->buf_cnt > 0);
1498
1499         return ERROR_OK;
1500 }
1501
1502 int gdb_init()
1503 {
1504         gdb_service_t *gdb_service;
1505         target_t *target = targets;
1506         int i = 0;
1507
1508         if (!target)
1509         {
1510                 WARNING("no gdb ports allocated as no target has been specified");
1511                 return ERROR_OK;
1512         }
1513
1514         if (gdb_port == 0)
1515         {
1516                 WARNING("no gdb port specified, using default port 3333");
1517                 gdb_port = 3333;
1518         }
1519
1520         while (target)
1521         {
1522                 char service_name[8];
1523
1524                 snprintf(service_name, 8, "gdb-%2.2i", i);
1525
1526                 gdb_service = malloc(sizeof(gdb_service_t));
1527                 gdb_service->target = target;
1528
1529                 add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
1530
1531                 DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);
1532
1533                 i++;
1534                 target = target->next;
1535         }
1536
1537         return ERROR_OK;
1538 }
1539
1540 /* daemon configuration command gdb_port */
1541 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1542 {
1543         if (argc == 0)
1544                 return ERROR_OK;
1545
1546         /* only if the port wasn't overwritten by cmdline */
1547         if (gdb_port == 0)
1548                 gdb_port = strtoul(args[0], NULL, 0);
1549
1550         return ERROR_OK;
1551 }
1552
1553 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1554 {
1555         if (argc == 1)
1556         {
1557                 if (strcmp(args[0], "resume") == 0)
1558                 {
1559                         detach_mode = GDB_DETACH_RESUME;
1560                         return ERROR_OK;
1561                 }
1562                 else if (strcmp(args[0], "reset") == 0)
1563                 {
1564                         detach_mode = GDB_DETACH_RESET;
1565                         return ERROR_OK;
1566                 }
1567                 else if (strcmp(args[0], "halt") == 0)
1568                 {
1569                         detach_mode = GDB_DETACH_HALT;
1570                         return ERROR_OK;
1571                 }
1572                 else if (strcmp(args[0], "nothing") == 0)
1573                 {
1574                         detach_mode = GDB_DETACH_NOTHING;
1575                         return ERROR_OK;
1576                 }
1577         }
1578
1579         WARNING("invalid gdb_detach configuration directive: %s", args[0]);
1580         return ERROR_OK;
1581 }
1582
1583 int gdb_register_commands(command_context_t *command_context)
1584 {
1585         register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
1586                         COMMAND_CONFIG, "");
1587         register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
1588                         COMMAND_CONFIG, "");
1589
1590         return ERROR_OK;
1591 }