src/helper/command.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008, Duane Ellis                                       *
   9  *   openocd@duaneeellis.com                                               *
  10  *                                                                         *
  11  *   part of this file is taken from libcli (libcli.sourceforge.net)       *
  12  *   Copyright (C) David Parrish (david@dparrish.com)                      *
  13  *                                                                         *
  14  *   This program is free software; you can redistribute it and/or modify  *
  15  *   it under the terms of the GNU General Public License as published by  *
  16  *   the Free Software Foundation; either version 2 of the License, or     *
  17  *   (at your option) any later version.                                   *
  18  *                                                                         *
  19  *   This program is distributed in the hope that it will be useful,       *
  20  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  21  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  22  *   GNU General Public License for more details.                          *
  23  *                                                                         *
  24  *   You should have received a copy of the GNU General Public License     *
  25  *   along with this program; if not, write to the                         *
  26  *   Free Software Foundation, Inc.,                                       *
  27  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  28  ***************************************************************************/
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #if !BUILD_ECOSBOARD
  34 /* see Embedder-HOWTO.txt in Jim Tcl project hosted on BerliOS*/
  35 #define JIM_EMBEDDED
  36 #endif
  37
  38 // @todo the inclusion of target.h here is a layering violation
  39 #include "target.h"
  40 #include "command.h"
  41 #include "configuration.h"
  42 #include "log.h"
  43 #include "time_support.h"
  44 #include "jim-eventloop.h"
  45
  46
  47 int fast_and_dangerous = 0;
  48 Jim_Interp *interp = NULL;
  49
  50 int handle_sleep_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  51 int handle_fast_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  52
  53 int run_command(command_context_t *context, command_t *c, char *words[], int num_words);
  54
  55 static void tcl_output(void *privData, const char *file, int line, const char *function, const char *string)
  56 {
  57         Jim_Obj *tclOutput = (Jim_Obj *)privData;
  58
  59         Jim_AppendString(interp, tclOutput, string, strlen(string));
  60 }
  61
  62 extern command_context_t *global_cmd_ctx;
  63
  64 void script_debug(Jim_Interp *interp, const char *name, int argc, Jim_Obj *const *argv)
  65 {
  66         int i;
  67
  68         LOG_DEBUG("command - %s", name);
  69         for (i = 0; i < argc; i++) {
  70                 int len;
  71                 const char *w = Jim_GetString(argv[i], &len);
  72
  73                 /* end of line comment? */
  74                 if (*w == '#')
  75                         break;
  76
  77                 LOG_DEBUG("%s - argv[%d]=%s", name, i, w);
  78         }
  79 }
  80
  81 static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
  82 {
  83         /* the private data is stashed in the interp structure */
  84         command_t *c;
  85         command_context_t *context;
  86         int retval;
  87         int i;
  88         int nwords;
  89         char **words;
  90
  91         /* DANGER!!!! be careful what we invoke here, since interp->cmdPrivData might
  92          * get overwritten by running other Jim commands! Treat it as an
  93          * emphemeral global variable that is used in lieu of an argument
  94          * to the fn and fish it out manually.
  95          */
  96         c = interp->cmdPrivData;
  97         if (c == NULL)
  98         {
  99                 LOG_ERROR("BUG: interp->cmdPrivData == NULL");
 100                 return JIM_ERR;
 101         }
 102         target_call_timer_callbacks_now();
 103         LOG_USER_N("%s", ""); /* Keep GDB connection alive*/
 104
 105         script_debug(interp, c->name, argc, argv);
 106
 107         words = malloc(sizeof(char *) * argc);
 108         for (i = 0; i < argc; i++)
 109         {
 110                 int len;
 111                 const char *w = Jim_GetString(argv[i], &len);
 112                 if (*w=='#')
 113                 {
 114                         /* hit an end of line comment */
 115                         break;
 116                 }
 117                 words[i] = strdup(w);
 118                 if (words[i] == NULL)
 119                 {
 120                         int j;
 121                         for (j = 0; j < i; j++)
 122                                 free(words[j]);
 123                         free(words);
 124                         return JIM_ERR;
 125                 }
 126         }
 127         nwords = i;
 128
 129         /* grab the command context from the associated data */
 130         context = Jim_GetAssocData(interp, "context");
 131         if (context == NULL)
 132         {
 133                 /* Tcl can invoke commands directly instead of via command_run_line(). This would
 134                  * happen when the Jim Tcl interpreter is provided by eCos.
 135                  */
 136                 context = global_cmd_ctx;
 137         }
 138
 139         /* capture log output and return it */
 140         Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
 141         /* a garbage collect can happen, so we need a reference count to this object */
 142         Jim_IncrRefCount(tclOutput);
 143
 144         log_add_callback(tcl_output, tclOutput);
 145
 146         retval = run_command(context, c, words, nwords);
 147
 148         log_remove_callback(tcl_output, tclOutput);
 149
 150         /* We dump output into this local variable */
 151         Jim_SetResult(interp, tclOutput);
 152         Jim_DecrRefCount(interp, tclOutput);
 153
 154         for (i = 0; i < nwords; i++)
 155                 free(words[i]);
 156         free(words);
 157
 158         int *return_retval = Jim_GetAssocData(interp, "retval");
 159         if (return_retval != NULL)
 160         {
 161                 *return_retval = retval;
 162         }
 163
 164         return (retval == ERROR_OK)?JIM_OK:JIM_ERR;
 165 }
 166
 167 /* nice short description of source file */
 168 #define __THIS__FILE__ "command.c"
 169
 170 command_t* register_command(command_context_t *context, command_t *parent, char *name, int (*handler)(struct command_context_s *context, char* name, char** args, int argc), enum command_mode mode, char *help)
 171 {
 172         command_t *c, *p;
 173
 174         if (!context || !name)
 175                 return NULL;
 176
 177         c = malloc(sizeof(command_t));
 178
 179         c->name = strdup(name);
 180         c->parent = parent;
 181         c->children = NULL;
 182         c->handler = handler;
 183         c->mode = mode;
 184         if (!help)
 185                 help="";
 186         c->next = NULL;
 187
 188         /* place command in tree */
 189         if (parent)
 190         {
 191                 if (parent->children)
 192                 {
 193                         /* find last child */
 194                         for (p = parent->children; p && p->next; p = p->next);
 195                         if (p)
 196                                 p->next = c;
 197                 }
 198                 else
 199                 {
 200                         parent->children = c;
 201                 }
 202         }
 203         else
 204         {
 205                 if (context->commands)
 206                 {
 207                         /* find last command */
 208                         for (p = context->commands; p && p->next; p = p->next);
 209                         if (p)
 210                                 p->next = c;
 211                 }
 212                 else
 213                 {
 214                         context->commands = c;
 215                 }
 216         }
 217
 218         /* just a placeholder, no handler */
 219         if (c->handler == NULL)
 220                 return c;
 221
 222         /* If this is a two level command, e.g. "flash banks", then the
 223          * "unknown" proc in startup.tcl must redirect to  this command.
 224          *
 225          * "flash banks" is translated by "unknown" to "flash_banks"
 226          * if such a proc exists
 227          */
 228         /* Print help for command */
 229         const char *t1="";
 230         const char *t2="";
 231         const char *t3="";
 232         /* maximum of two levels :-) */
 233         if (c->parent != NULL)
 234         {
 235                 t1 = c->parent->name;
 236                 t2="_";
 237         }
 238         t3 = c->name;
 239         const char *full_name = alloc_printf("ocd_%s%s%s", t1, t2, t3);
 240         Jim_CreateCommand(interp, full_name, script_command, c, NULL);
 241         free((void *)full_name);
 242
 243         /* we now need to add an overrideable proc */
 244         const char *override_name = alloc_printf("proc %s%s%s {args} {if {[catch {eval ocd_%s%s%s $args}]==0} {return \"\"} else { return -code error }", t1, t2, t3, t1, t2, t3);
 245         Jim_Eval_Named(interp, override_name, __THIS__FILE__, __LINE__);
 246         free((void *)override_name);
 247
 248         /* accumulate help text in Tcl helptext list.  */
 249         Jim_Obj *helptext = Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
 250         if (Jim_IsShared(helptext))
 251                 helptext = Jim_DuplicateObj(interp, helptext);
 252         Jim_Obj *cmd_entry = Jim_NewListObj(interp, NULL, 0);
 253
 254         Jim_Obj *cmd_list = Jim_NewListObj(interp, NULL, 0);
 255
 256         /* maximum of two levels :-) */
 257         if (c->parent != NULL)
 258         {
 259                 Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->parent->name, -1));
 260         }
 261         Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->name, -1));
 262
 263         Jim_ListAppendElement(interp, cmd_entry, cmd_list);
 264         Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
 265         Jim_ListAppendElement(interp, helptext, cmd_entry);
 266         return c;
 267 }
 268
 269 int unregister_all_commands(command_context_t *context)
 270 {
 271         command_t *c, *c2;
 272
 273         if (context == NULL)
 274                 return ERROR_OK;
 275
 276         while (NULL != context->commands)
 277         {
 278                 c = context->commands;
 279
 280                 while (NULL != c->children)
 281                 {
 282                         c2 = c->children;
 283                         c->children = c->children->next;
 284                         free(c2->name);
 285                         c2->name = NULL;
 286                         free(c2);
 287                         c2 = NULL;
 288                 }
 289
 290                 context->commands = context->commands->next;
 291
 292                 free(c->name);
 293                 c->name = NULL;
 294                 free(c);
 295                 c = NULL;
 296         }
 297
 298         return ERROR_OK;
 299 }
 300
 301 int unregister_command(command_context_t *context, char *name)
 302 {
 303         command_t *c, *p = NULL, *c2;
 304
 305         if ((!context) || (!name))
 306                 return ERROR_INVALID_ARGUMENTS;
 307
 308         /* find command */
 309         c = context->commands;
 310
 311         while (NULL != c)
 312         {
 313                 if (strcmp(name, c->name) == 0)
 314                 {
 315                         /* unlink command */
 316                         if (p)
 317                         {
 318                                 p->next = c->next;
 319                         }
 320                         else
 321                         {
 322                                 /* first element in command list */
 323                                 context->commands = c->next;
 324                         }
 325
 326                         /* unregister children */
 327                         while (NULL != c->children)
 328                         {
 329                                 c2 = c->children;
 330                                 c->children = c->children->next;
 331                                 free(c2->name);
 332                                 c2->name = NULL;
 333                                 free(c2);
 334                                 c2 = NULL;
 335                         }
 336
 337                         /* delete command */
 338                         free(c->name);
 339                         c->name = NULL;
 340                         free(c);
 341                         c = NULL;
 342                         return ERROR_OK;
 343                 }
 344
 345                 /* remember the last command for unlinking */
 346                 p = c;
 347                 c = c->next;
 348         }
 349
 350         return ERROR_OK;
 351 }
 352
 353 void command_output_text(command_context_t *context, const char *data)
 354 {
 355         if (context && context->output_handler && data) {
 356                 context->output_handler(context, data);
 357         }
 358 }
 359
 360 void command_print_sameline(command_context_t *context, const char *format, ...)
 361 {
 362         char *string;
 363
 364         va_list ap;
 365         va_start(ap, format);
 366
 367         string = alloc_vprintf(format, ap);
 368         if (string != NULL)
 369         {
 370                 /* we want this collected in the log + we also want to pick it up as a tcl return
 371                  * value.
 372                  *
 373                  * The latter bit isn't precisely neat, but will do for now.
 374                  */
 375                 LOG_USER_N("%s", string);
 376                 /* We already printed it above */
 377                 /* command_output_text(context, string); */
 378                 free(string);
 379         }
 380
 381         va_end(ap);
 382 }
 383
 384 void command_print(command_context_t *context, const char *format, ...)
 385 {
 386         char *string;
 387
 388         va_list ap;
 389         va_start(ap, format);
 390
 391         string = alloc_vprintf(format, ap);
 392         if (string != NULL)
 393         {
 394                 strcat(string, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
 395                 /* we want this collected in the log + we also want to pick it up as a tcl return
 396                  * value.
 397                  *
 398                  * The latter bit isn't precisely neat, but will do for now.
 399                  */
 400                 LOG_USER_N("%s", string);
 401                 /* We already printed it above */
 402                 /* command_output_text(context, string); */
 403                 free(string);
 404         }
 405
 406         va_end(ap);
 407 }
 408
 409 int run_command(command_context_t *context, command_t *c, char *words[], int num_words)
 410 {
 411         int start_word = 0;
 412         if (!((context->mode == COMMAND_CONFIG) || (c->mode == COMMAND_ANY) || (c->mode == context->mode)))
 413         {
 414                 /* Config commands can not run after the config stage */
 415                 LOG_ERROR("Command '%s' only runs during configuration stage", c->name);
 416                 return ERROR_FAIL;
 417         }
 418
 419         int retval = c->handler(context, c->name, words + start_word + 1, num_words - start_word - 1);
 420         if (retval == ERROR_COMMAND_SYNTAX_ERROR)
 421         {
 422                 /* Print help for command */
 423                 const char *t1="";
 424                 const char *t2="";
 425                 const char *t3="";
 426                 /* maximum of two levels :-) */
 427                 if (c->parent != NULL)
 428                 {
 429                         t1 = c->parent->name;
 430                         t2=" ";
 431                 }
 432                 t3 = c->name;
 433                 command_run_linef(context, "help {%s%s%s}", t1, t2, t3);
 434         }
 435         else if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
 436         {
 437                 /* just fall through for a shutdown request */
 438         }
 439         else if (retval != ERROR_OK)
 440         {
 441                 /* we do not print out an error message because the command *should*
 442                  * have printed out an error
 443                  */
 444                 LOG_DEBUG("Command failed with error code %d", retval);
 445         }
 446
 447         return retval;
 448 }
 449
 450 int command_run_line(command_context_t *context, char *line)
 451 {
 452         /* all the parent commands have been registered with the interpreter
 453          * so, can just evaluate the line as a script and check for
 454          * results
 455          */
 456         /* run the line thru a script engine */
 457         int retval = ERROR_FAIL;
 458         int retcode;
 459         /* Beware! This code needs to be reentrant. It is also possible
 460          * for OpenOCD commands to be invoked directly from Tcl. This would
 461          * happen when the Jim Tcl interpreter is provided by eCos for
 462          * instance.
 463          */
 464         Jim_DeleteAssocData(interp, "context");
 465         retcode = Jim_SetAssocData(interp, "context", NULL, context);
 466         if (retcode == JIM_OK)
 467         {
 468                 /* associated the return value */
 469                 Jim_DeleteAssocData(interp, "retval");
 470                 retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
 471                 if (retcode == JIM_OK)
 472                 {
 473                         retcode = Jim_Eval_Named(interp, line, __THIS__FILE__, __LINE__);
 474
 475                         Jim_DeleteAssocData(interp, "retval");
 476                 }
 477                 Jim_DeleteAssocData(interp, "context");
 478         }
 479         if (retcode == JIM_ERR) {
 480                 if (retval != ERROR_COMMAND_CLOSE_CONNECTION)
 481                 {
 482                         /* We do not print the connection closed error message */
 483                         Jim_PrintErrorMessage(interp);
 484                 }
 485                 if (retval == ERROR_OK)
 486                 {
 487                         /* It wasn't a low level OpenOCD command that failed */
 488                         return ERROR_FAIL;
 489                 }
 490                 return retval;
 491         } else if (retcode == JIM_EXIT) {
 492                 /* ignore. */
 493                 /* exit(Jim_GetExitCode(interp)); */
 494         } else {
 495                 const char *result;
 496                 int reslen;
 497
 498                 result = Jim_GetString(Jim_GetResult(interp), &reslen);
 499                 if (reslen > 0)
 500                 {
 501                         int i;
 502                         char buff[256 + 1];
 503                         for (i = 0; i < reslen; i += 256)
 504                         {
 505                                 int chunk;
 506                                 chunk = reslen - i;
 507                                 if (chunk > 256)
 508                                         chunk = 256;
 509                                 strncpy(buff, result + i, chunk);
 510                                 buff[chunk] = 0;
 511                                 LOG_USER_N("%s", buff);
 512                         }
 513                         LOG_USER_N("%s", "\n");
 514                 }
 515                 retval = ERROR_OK;
 516         }
 517         return retval;
 518 }
 519
 520 int command_run_linef(command_context_t *context, const char *format, ...)
 521 {
 522         int retval = ERROR_FAIL;
 523         char *string;
 524         va_list ap;
 525         va_start(ap, format);
 526         string = alloc_vprintf(format, ap);
 527         if (string != NULL)
 528         {
 529                 retval = command_run_line(context, string);
 530         }
 531         va_end(ap);
 532         return retval;
 533 }
 534
 535 void command_set_output_handler(command_context_t* context, int (*output_handler)(struct command_context_s *context, const char* line), void *priv)
 536 {
 537         context->output_handler = output_handler;
 538         context->output_handler_priv = priv;
 539 }
 540
 541 command_context_t* copy_command_context(command_context_t* context)
 542 {
 543         command_context_t* copy_context = malloc(sizeof(command_context_t));
 544
 545         *copy_context = *context;
 546
 547         return copy_context;
 548 }
 549
 550 int command_done(command_context_t *context)
 551 {
 552         free(context);
 553         context = NULL;
 554
 555         return ERROR_OK;
 556 }
 557
 558 /* find full path to file */
 559 static int jim_find(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 560 {
 561         if (argc != 2)
 562                 return JIM_ERR;
 563         const char *file = Jim_GetString(argv[1], NULL);
 564         char *full_path = find_file(file);
 565         if (full_path == NULL)
 566                 return JIM_ERR;
 567         Jim_Obj *result = Jim_NewStringObj(interp, full_path, strlen(full_path));
 568         free(full_path);
 569
 570         Jim_SetResult(interp, result);
 571         return JIM_OK;
 572 }
 573
 574 static int jim_echo(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 575 {
 576         if (argc != 2)
 577                 return JIM_ERR;
 578         const char *str = Jim_GetString(argv[1], NULL);
 579         LOG_USER("%s", str);
 580         return JIM_OK;
 581 }
 582
 583 static size_t openocd_jim_fwrite(const void *_ptr, size_t size, size_t n, void *cookie)
 584 {
 585         size_t nbytes;
 586         const char *ptr;
 587         Jim_Interp *interp;
 588
 589         /* make it a char easier to read code */
 590         ptr = _ptr;
 591         interp = cookie;
 592         nbytes = size * n;
 593         if (ptr == NULL || interp == NULL || nbytes == 0) {
 594                 return 0;
 595         }
 596
 597         /* do we have to chunk it? */
 598         if (ptr[nbytes] == 0)
 599         {
 600                 /* no it is a C style string */
 601                 LOG_USER_N("%s", ptr);
 602                 return strlen(ptr);
 603         }
 604         /* GRR we must chunk - not null terminated */
 605         while (nbytes) {
 606                 char chunk[128 + 1];
 607                 int x;
 608
 609                 x = nbytes;
 610                 if (x > 128) {
 611                         x = 128;
 612                 }
 613                 /* copy it */
 614                 memcpy(chunk, ptr, x);
 615                 /* terminate it */
 616                 chunk[n] = 0;
 617                 /* output it */
 618                 LOG_USER_N("%s", chunk);
 619                 ptr += x;
 620                 nbytes -= x;
 621         }
 622
 623         return n;
 624 }
 625
 626 static size_t openocd_jim_fread(void *ptr, size_t size, size_t n, void *cookie)
 627 {
 628         /* TCL wants to read... tell him no */
 629         return 0;
 630 }
 631
 632 static int openocd_jim_vfprintf(void *cookie, const char *fmt, va_list ap)
 633 {
 634         char *cp;
 635         int n;
 636         Jim_Interp *interp;
 637
 638         n = -1;
 639         interp = cookie;
 640         if (interp == NULL)
 641                 return n;
 642
 643         cp = alloc_vprintf(fmt, ap);
 644         if (cp)
 645         {
 646                 LOG_USER_N("%s", cp);
 647                 n = strlen(cp);
 648                 free(cp);
 649         }
 650         return n;
 651 }
 652
 653 static int openocd_jim_fflush(void *cookie)
 654 {
 655         /* nothing to flush */
 656         return 0;
 657 }
 658
 659 static char* openocd_jim_fgets(char *s, int size, void *cookie)
 660 {
 661         /* not supported */
 662         errno = ENOTSUP;
 663         return NULL;
 664 }
 665
 666 static int jim_capture(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 667 {
 668         if (argc != 2)
 669                 return JIM_ERR;
 670         int retcode;
 671         const char *str = Jim_GetString(argv[1], NULL);
 672
 673         /* capture log output and return it */
 674         Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
 675         /* a garbage collect can happen, so we need a reference count to this object */
 676         Jim_IncrRefCount(tclOutput);
 677
 678         log_add_callback(tcl_output, tclOutput);
 679
 680         retcode = Jim_Eval_Named(interp, str, __THIS__FILE__, __LINE__);
 681
 682         log_remove_callback(tcl_output, tclOutput);
 683
 684         /* We dump output into this local variable */
 685         Jim_SetResult(interp, tclOutput);
 686         Jim_DecrRefCount(interp, tclOutput);
 687
 688         return retcode;
 689 }
 690
 691 command_context_t* command_init()
 692 {
 693         command_context_t* context = malloc(sizeof(command_context_t));
 694         extern const char startup_tcl[];
 695         const char *HostOs;
 696
 697         context->mode = COMMAND_EXEC;
 698         context->commands = NULL;
 699         context->current_target = 0;
 700         context->output_handler = NULL;
 701         context->output_handler_priv = NULL;
 702
 703 #if !BUILD_ECOSBOARD
 704         Jim_InitEmbedded();
 705         /* Create an interpreter */
 706         interp = Jim_CreateInterp();
 707         /* Add all the Jim core commands */
 708         Jim_RegisterCoreCommands(interp);
 709 #endif
 710
 711 #if defined(_MSC_VER)
 712         /* WinXX - is generic, the forward
 713          * looking problem is this:
 714          *
 715          *   "win32" or "win64"
 716          *
 717          * "winxx" is generic.
 718          */
 719         HostOs = "winxx";
 720 #elif defined(__LINUX__)
 721         HostOs = "linux";
 722 #elif defined(__DARWIN__)
 723         HostOs = "darwin";
 724 #elif defined(__CYGWIN__)
 725         HostOs = "cygwin";
 726 #elif defined(__MINGW32__)
 727         HostOs = "mingw32";
 728 #else
 729         HostOs = "other";
 730 #endif
 731         Jim_SetGlobalVariableStr(interp, "ocd_HOSTOS", Jim_NewStringObj(interp, HostOs , strlen(HostOs)));
 732
 733         Jim_CreateCommand(interp, "ocd_find", jim_find, NULL, NULL);
 734         Jim_CreateCommand(interp, "echo", jim_echo, NULL, NULL);
 735         Jim_CreateCommand(interp, "capture", jim_capture, NULL, NULL);
 736
 737         /* Set Jim's STDIO */
 738         interp->cookie_stdin = interp;
 739         interp->cookie_stdout = interp;
 740         interp->cookie_stderr = interp;
 741         interp->cb_fwrite = openocd_jim_fwrite;
 742         interp->cb_fread = openocd_jim_fread ;
 743         interp->cb_vfprintf = openocd_jim_vfprintf;
 744         interp->cb_fflush = openocd_jim_fflush;
 745         interp->cb_fgets = openocd_jim_fgets;
 746
 747 #if !BUILD_ECOSBOARD
 748         Jim_EventLoopOnLoad(interp);
 749 #endif
 750         if (Jim_Eval_Named(interp, startup_tcl, "embedded:startup.tcl",1) == JIM_ERR)
 751         {
 752                 LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD compile time)");
 753                 Jim_PrintErrorMessage(interp);
 754                 exit(-1);
 755         }
 756
 757         register_command(context, NULL, "sleep", handle_sleep_command,
 758                                          COMMAND_ANY, "<n> [busy] - sleep for n milliseconds. \"busy\" means busy wait");
 759
 760         register_command(context, NULL, "fast", handle_fast_command,
 761                                          COMMAND_ANY, "fast <enable/disable> - place at beginning of config files. Sets defaults to fast and dangerous.");
 762
 763         return context;
 764 }
 765
 766 int command_context_mode(command_context_t *cmd_ctx, enum command_mode mode)
 767 {
 768         if (!cmd_ctx)
 769                 return ERROR_INVALID_ARGUMENTS;
 770
 771         cmd_ctx->mode = mode;
 772         return ERROR_OK;
 773 }
 774
 775 /* sleep command sleeps for <n> miliseconds
 776  * this is useful in target startup scripts
 777  */
 778 int handle_sleep_command(struct command_context_s *cmd_ctx,
 779                 char *cmd, char **args, int argc)
 780 {
 781         bool busy = false;
 782         if (argc == 2)
 783         {
 784                 if (strcmp(args[1], "busy") == 0)
 785                         busy = true;
 786                 else
 787                         return ERROR_COMMAND_SYNTAX_ERROR;
 788         }
 789         else if (argc < 1 || argc > 2)
 790                 return ERROR_COMMAND_SYNTAX_ERROR;
 791
 792         unsigned long duration = 0;
 793         int retval = parse_ulong(args[0], &duration);
 794         if (ERROR_OK != retval)
 795                 return retval;
 796
 797         if (!busy)
 798         {
 799                 long long then = timeval_ms();
 800                 while (timeval_ms() - then < (long long)duration)
 801                 {
 802                         target_call_timer_callbacks_now();
 803                         usleep(1000);
 804                 }
 805         }
 806         else
 807                 busy_sleep(duration);
 808
 809         return ERROR_OK;
 810 }
 811
 812 int handle_fast_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 813 {
 814         if (argc != 1)
 815                 return ERROR_COMMAND_SYNTAX_ERROR;
 816
 817         fast_and_dangerous = strcmp("enable", args[0]) == 0;
 818
 819         return ERROR_OK;
 820 }
 821
 822 void process_jim_events(void)
 823 {
 824 #if !BUILD_ECOSBOARD
 825         static int recursion = 0;
 826
 827         if (!recursion)
 828         {
 829                 recursion++;
 830                 Jim_ProcessEvents (interp, JIM_ALL_EVENTS | JIM_DONT_WAIT);
 831                 recursion--;
 832         }
 833 #endif
 834 }
 835
 836 void register_jim(struct command_context_s *cmd_ctx, const char *name, int (*cmd)(Jim_Interp *interp, int argc, Jim_Obj *const *argv), const char *help)
 837 {
 838         Jim_CreateCommand(interp, name, cmd, NULL, NULL);
 839
 840         /* FIX!!! it would be prettier to invoke add_help_text...
 841          * accumulate help text in Tcl helptext list.  */
 842         Jim_Obj *helptext = Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
 843         if (Jim_IsShared(helptext))
 844                 helptext = Jim_DuplicateObj(interp, helptext);
 845
 846         Jim_Obj *cmd_entry = Jim_NewListObj(interp, NULL, 0);
 847
 848         Jim_Obj *cmd_list = Jim_NewListObj(interp, NULL, 0);
 849         Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, name, -1));
 850
 851         Jim_ListAppendElement(interp, cmd_entry, cmd_list);
 852         Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
 853         Jim_ListAppendElement(interp, helptext, cmd_entry);
 854 }
 855
 856 /* return global variable long value or 0 upon failure */
 857 long jim_global_long(const char *variable)
 858 {
 859         Jim_Obj *objPtr = Jim_GetGlobalVariableStr(interp, variable, JIM_ERRMSG);
 860         long t;
 861         if (Jim_GetLong(interp, objPtr, &t) == JIM_OK)
 862         {
 863                 return t;
 864         }
 865         return 0;
 866 }
 867
 868 #define DEFINE_PARSE_NUM_TYPE(name, type, func, min, max) \
 869         int parse##name(const char *str, type *ul) \
 870         { \
 871                 if (!*str) \
 872                 { \
 873                         LOG_ERROR("Invalid command argument"); \
 874                         return ERROR_COMMAND_ARGUMENT_INVALID; \
 875                 } \
 876                 char *end; \
 877                 *ul = func(str, &end, 0); \
 878                 if (*end) \
 879                 { \
 880                         LOG_ERROR("Invalid command argument"); \
 881                         return ERROR_COMMAND_ARGUMENT_INVALID; \
 882                 } \
 883                 if ((max == *ul) && (ERANGE == errno)) \
 884                 { \
 885                         LOG_ERROR("Argument overflow"); \
 886                         return ERROR_COMMAND_ARGUMENT_OVERFLOW; \
 887                 } \
 888                 if (min && (min == *ul) && (ERANGE == errno)) \
 889                 { \
 890                         LOG_ERROR("Argument underflow"); \
 891                         return ERROR_COMMAND_ARGUMENT_UNDERFLOW; \
 892                 } \
 893                 return ERROR_OK; \
 894         }
 895 DEFINE_PARSE_NUM_TYPE(_ulong, unsigned long , strtoul, 0, ULONG_MAX)
 896 DEFINE_PARSE_NUM_TYPE(_ullong, unsigned long long, strtoull, 0, ULLONG_MAX)
 897 DEFINE_PARSE_NUM_TYPE(_long, long , strtol, LONG_MIN, LONG_MAX)
 898 DEFINE_PARSE_NUM_TYPE(_llong, long long, strtoll, LLONG_MIN, LLONG_MAX)
 899
 900 #define DEFINE_PARSE_WRAPPER(name, type, min, max, functype, funcname) \
 901         int parse##name(const char *str, type *ul) \
 902         { \
 903                 functype n; \
 904                 int retval = parse##funcname(str, &n); \
 905                 if (ERROR_OK != retval) \
 906                         return retval; \
 907                 if (n > max) \
 908                         return ERROR_COMMAND_ARGUMENT_OVERFLOW; \
 909                 if (min) \
 910                         return ERROR_COMMAND_ARGUMENT_UNDERFLOW; \
 911                 *ul = n; \
 912                 return ERROR_OK; \
 913         }
 914
 915 #define DEFINE_PARSE_ULONG(name, type, min, max) \
 916         DEFINE_PARSE_WRAPPER(name, type, min, max, unsigned long, _ulong)
 917 DEFINE_PARSE_ULONG(_uint, unsigned, 0, UINT_MAX)
 918 DEFINE_PARSE_ULONG(_u32, uint32_t, 0, UINT32_MAX)
 919 DEFINE_PARSE_ULONG(_u16, uint16_t, 0, UINT16_MAX)
 920 DEFINE_PARSE_ULONG(_u8, uint8_t, 0, UINT8_MAX)
 921
 922 #define DEFINE_PARSE_LONG(name, type, min, max) \
 923         DEFINE_PARSE_WRAPPER(name, type, min, max, long, _long)
 924 DEFINE_PARSE_LONG(_int, int, n < INT_MIN, INT_MAX)
 925 DEFINE_PARSE_LONG(_s32, int32_t, n < INT32_MIN, INT32_MAX)
 926 DEFINE_PARSE_LONG(_s16, int16_t, n < INT16_MIN, INT16_MAX)
 927 DEFINE_PARSE_LONG(_s8, int8_t, n < INT8_MIN, INT8_MAX)