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   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 Jim_Interp *interp = NULL;
  48
  49 static int run_command(struct command_context *context,
  50                 struct command *c, const char *words[], unsigned num_words);
  51
  52 static void tcl_output(void *privData, const char *file, unsigned line,
  53                 const char *function, const char *string)
  54 {
  55         Jim_Obj *tclOutput = (Jim_Obj *)privData;
  56         Jim_AppendString(interp, tclOutput, string, strlen(string));
  57 }
  58
  59 extern struct command_context *global_cmd_ctx;
  60
  61 void script_debug(Jim_Interp *interp, const char *name,
  62                 unsigned argc, Jim_Obj *const *argv)
  63 {
  64         LOG_DEBUG("command - %s", name);
  65         for (unsigned i = 0; i < argc; i++)
  66         {
  67                 int len;
  68                 const char *w = Jim_GetString(argv[i], &len);
  69
  70                 /* end of line comment? */
  71                 if (*w == '#')
  72                         break;
  73
  74                 LOG_DEBUG("%s - argv[%d]=%s", name, i, w);
  75         }
  76 }
  77
  78 static void script_command_args_free(const char **words, unsigned nwords)
  79 {
  80         for (unsigned i = 0; i < nwords; i++)
  81                 free((void *)words[i]);
  82         free(words);
  83 }
  84 static const char **script_command_args_alloc(
  85                 unsigned argc, Jim_Obj *const *argv, unsigned *nwords)
  86 {
  87         const char **words = malloc(argc * sizeof(char *));
  88         if (NULL == words)
  89                 return NULL;
  90
  91         unsigned i;
  92         for (i = 0; i < argc; i++)
  93         {
  94                 int len;
  95                 const char *w = Jim_GetString(argv[i], &len);
  96                 /* a comment may end the line early */
  97                 if (*w == '#')
  98                         break;
  99
 100                 words[i] = strdup(w);
 101                 if (words[i] == NULL)
 102                 {
 103                         script_command_args_free(words, i);
 104                         return NULL;
 105                 }
 106         }
 107         *nwords = i;
 108         return words;
 109 }
 110
 111 static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 112 {
 113         /* the private data is stashed in the interp structure */
 114         struct command *c;
 115         struct command_context *context;
 116         int retval;
 117
 118         /* DANGER!!!! be careful what we invoke here, since interp->cmdPrivData might
 119          * get overwritten by running other Jim commands! Treat it as an
 120          * emphemeral global variable that is used in lieu of an argument
 121          * to the fn and fish it out manually.
 122          */
 123         c = interp->cmdPrivData;
 124         if (c == NULL)
 125         {
 126                 LOG_ERROR("BUG: interp->cmdPrivData == NULL");
 127                 return JIM_ERR;
 128         }
 129         target_call_timer_callbacks_now();
 130         LOG_USER_N("%s", ""); /* Keep GDB connection alive*/
 131
 132         script_debug(interp, c->name, argc, argv);
 133
 134         unsigned nwords;
 135         const char **words = script_command_args_alloc(argc, argv, &nwords);
 136         if (NULL == words)
 137                 return JIM_ERR;
 138
 139         /* grab the command context from the associated data */
 140         context = Jim_GetAssocData(interp, "context");
 141         if (context == NULL)
 142         {
 143                 /* Tcl can invoke commands directly instead of via command_run_line(). This would
 144                  * happen when the Jim Tcl interpreter is provided by eCos.
 145                  */
 146                 context = global_cmd_ctx;
 147         }
 148
 149         /* capture log output and return it */
 150         Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
 151         /* a garbage collect can happen, so we need a reference count to this object */
 152         Jim_IncrRefCount(tclOutput);
 153
 154         log_add_callback(tcl_output, tclOutput);
 155
 156         retval = run_command(context, c, (const char **)words, nwords);
 157
 158         log_remove_callback(tcl_output, tclOutput);
 159
 160         /* We dump output into this local variable */
 161         Jim_SetResult(interp, tclOutput);
 162         Jim_DecrRefCount(interp, tclOutput);
 163
 164         script_command_args_free(words, nwords);
 165
 166         int *return_retval = Jim_GetAssocData(interp, "retval");
 167         if (return_retval != NULL)
 168         {
 169                 *return_retval = retval;
 170         }
 171
 172         return (retval == ERROR_OK)?JIM_OK:JIM_ERR;
 173 }
 174
 175 /* nice short description of source file */
 176 #define __THIS__FILE__ "command.c"
 177
 178 /**
 179  * Find a command by name from a list of commands.
 180  * @returns Returns the named command if it exists in the list.
 181  * Returns NULL otherwise.
 182  */
 183 static struct command *command_find(struct command *head, const char *name)
 184 {
 185         for (struct command *cc = head; cc; cc = cc->next)
 186         {
 187                 if (strcmp(cc->name, name) == 0)
 188                         return cc;
 189         }
 190         return NULL;
 191 }
 192
 193 /**
 194  * Add the command into the linked list, sorted by name.
 195  * @param head Address to head of command list pointer, which may be
 196  * updated if @c c gets inserted at the beginning of the list.
 197  * @param c The command to add to the list pointed to by @c head.
 198  */
 199 static void command_add_child(struct command **head, struct command *c)
 200 {
 201         assert(head);
 202         if (NULL == *head)
 203         {
 204                 *head = c;
 205                 return;
 206         }
 207
 208         while ((*head)->next && (strcmp(c->name, (*head)->name) > 0))
 209                 head = &(*head)->next;
 210
 211         if (strcmp(c->name, (*head)->name) > 0) {
 212                 c->next = (*head)->next;
 213                 (*head)->next = c;
 214         } else {
 215                 c->next = *head;
 216                 *head = c;
 217         }
 218 }
 219
 220 static struct command **command_list_for_parent(
 221                 struct command_context *cmd_ctx, struct command *parent)
 222 {
 223         return parent ? &parent->children : &cmd_ctx->commands;
 224 }
 225
 226 static struct command *command_new(struct command_context *cmd_ctx,
 227                 struct command *parent, const char *name,
 228                 command_handler_t handler, enum command_mode mode,
 229                 const char *help)
 230 {
 231         assert(name);
 232
 233         struct command *c = malloc(sizeof(struct command));
 234         memset(c, 0, sizeof(struct command));
 235
 236         c->name = strdup(name);
 237         if (help)
 238                 c->help = strdup(help);
 239         c->parent = parent;
 240         c->handler = handler;
 241         c->mode = mode;
 242
 243         command_add_child(command_list_for_parent(cmd_ctx, parent), c);
 244
 245         return c;
 246 }
 247 static void command_free(struct command *c)
 248 {
 249         /// @todo if command has a handler, unregister its jim command!
 250
 251         while (NULL != c->children)
 252         {
 253                 struct command *tmp = c->children;
 254                 c->children = tmp->next;
 255                 command_free(tmp);
 256         }
 257
 258         if (c->name)
 259                 free(c->name);
 260         if (c->help)
 261                 free((void*)c->help);
 262         free(c);
 263 }
 264
 265 struct command* register_command(struct command_context *context,
 266                 struct command *parent, const char *name,
 267                 command_handler_t handler, enum command_mode mode,
 268                 const char *help)
 269 {
 270         if (!context || !name)
 271                 return NULL;
 272
 273         struct command **head = command_list_for_parent(context, parent);
 274         struct command *c = command_find(*head, name);
 275         if (NULL != c)
 276         {
 277                 LOG_ERROR("command '%s' is already registered in '%s' context",
 278                                 name, parent ? parent->name : "<global>");
 279                 return c;
 280         }
 281
 282         c = command_new(context, parent, name, handler, mode, help);
 283         /* if allocation failed or it is a placeholder (no handler), we're done */
 284         if (NULL == c || NULL == c->handler)
 285                 return c;
 286
 287         const char *full_name = command_name(c, '_');
 288
 289         const char *ocd_name = alloc_printf("ocd_%s", full_name);
 290         Jim_CreateCommand(interp, ocd_name, script_command, c, NULL);
 291         free((void *)ocd_name);
 292
 293         /* we now need to add an overrideable proc */
 294         const char *override_name = alloc_printf("proc %s {args} {"
 295                         "if {[catch {eval ocd_%s $args}] == 0} "
 296                         "{return \"\"} else {return -code error}}",
 297                         full_name, full_name);
 298         Jim_Eval_Named(interp, override_name, __THIS__FILE__, __LINE__);
 299         free((void *)override_name);
 300
 301         free((void *)full_name);
 302
 303         return c;
 304 }
 305
 306 int unregister_all_commands(struct command_context *context,
 307                 struct command *parent)
 308 {
 309         if (context == NULL)
 310                 return ERROR_OK;
 311
 312         struct command **head = command_list_for_parent(context, parent);
 313         while (NULL != *head)
 314         {
 315                 struct command *tmp = *head;
 316                 *head = tmp->next;
 317                 command_free(tmp);
 318         }
 319
 320         return ERROR_OK;
 321 }
 322
 323 int unregister_command(struct command_context *context,
 324                 struct command *parent, const char *name)
 325 {
 326         if ((!context) || (!name))
 327                 return ERROR_INVALID_ARGUMENTS;
 328
 329         struct command *p = NULL;
 330         struct command **head = command_list_for_parent(context, parent);
 331         for (struct command *c = *head; NULL != c; p = c, c = c->next)
 332         {
 333                 if (strcmp(name, c->name) != 0)
 334                         continue;
 335
 336                 if (p)
 337                         p->next = c->next;
 338                 else
 339                         *head = c->next;
 340
 341                 command_free(c);
 342                 return ERROR_OK;
 343         }
 344
 345         return ERROR_OK;
 346 }
 347
 348 void command_output_text(struct command_context *context, const char *data)
 349 {
 350         if (context && context->output_handler && data) {
 351                 context->output_handler(context, data);
 352         }
 353 }
 354
 355 void command_print_sameline(struct command_context *context, const char *format, ...)
 356 {
 357         char *string;
 358
 359         va_list ap;
 360         va_start(ap, format);
 361
 362         string = alloc_vprintf(format, ap);
 363         if (string != NULL)
 364         {
 365                 /* we want this collected in the log + we also want to pick it up as a tcl return
 366                  * value.
 367                  *
 368                  * The latter bit isn't precisely neat, but will do for now.
 369                  */
 370                 LOG_USER_N("%s", string);
 371                 /* We already printed it above */
 372                 /* command_output_text(context, string); */
 373                 free(string);
 374         }
 375
 376         va_end(ap);
 377 }
 378
 379 void command_print(struct command_context *context, const char *format, ...)
 380 {
 381         char *string;
 382
 383         va_list ap;
 384         va_start(ap, format);
 385
 386         string = alloc_vprintf(format, ap);
 387         if (string != NULL)
 388         {
 389                 strcat(string, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
 390                 /* we want this collected in the log + we also want to pick it up as a tcl return
 391                  * value.
 392                  *
 393                  * The latter bit isn't precisely neat, but will do for now.
 394                  */
 395                 LOG_USER_N("%s", string);
 396                 /* We already printed it above */
 397                 /* command_output_text(context, string); */
 398                 free(string);
 399         }
 400
 401         va_end(ap);
 402 }
 403
 404 static char *__command_name(struct command *c, char delim, unsigned extra)
 405 {
 406         char *name;
 407         unsigned len = strlen(c->name);
 408         if (NULL == c->parent) {
 409                 // allocate enough for the name, child names, and '\0'
 410                 name = malloc(len + extra + 1);
 411                 strcpy(name, c->name);
 412         } else {
 413                 // parent's extra must include both the space and name
 414                 name = __command_name(c->parent, delim, 1 + len + extra);
 415                 char dstr[2] = { delim, 0 };
 416                 strcat(name, dstr);
 417                 strcat(name, c->name);
 418         }
 419         return name;
 420 }
 421 char *command_name(struct command *c, char delim)
 422 {
 423         return __command_name(c, delim, 0);
 424 }
 425
 426 static int run_command(struct command_context *context,
 427                 struct command *c, const char *words[], unsigned num_words)
 428 {
 429         if (!((context->mode == COMMAND_CONFIG) || (c->mode == COMMAND_ANY) || (c->mode == context->mode)))
 430         {
 431                 /* Config commands can not run after the config stage */
 432                 LOG_ERROR("Command '%s' only runs during configuration stage", c->name);
 433                 return ERROR_FAIL;
 434         }
 435
 436         struct command_invocation cmd = {
 437                         .ctx = context,
 438                         .name = c->name,
 439                         .argc = num_words - 1,
 440                         .argv = words + 1,
 441                 };
 442         int retval = c->handler(&cmd);
 443         if (retval == ERROR_COMMAND_SYNTAX_ERROR)
 444         {
 445                 /* Print help for command */
 446                 char *full_name = command_name(c, ' ');
 447                 if (NULL != full_name) {
 448                         command_run_linef(context, "help %s", full_name);
 449                         free(full_name);
 450                 } else
 451                         retval = -ENOMEM;
 452         }
 453         else if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
 454         {
 455                 /* just fall through for a shutdown request */
 456         }
 457         else if (retval != ERROR_OK)
 458         {
 459                 /* we do not print out an error message because the command *should*
 460                  * have printed out an error
 461                  */
 462                 LOG_DEBUG("Command failed with error code %d", retval);
 463         }
 464
 465         return retval;
 466 }
 467
 468 int command_run_line(struct command_context *context, char *line)
 469 {
 470         /* all the parent commands have been registered with the interpreter
 471          * so, can just evaluate the line as a script and check for
 472          * results
 473          */
 474         /* run the line thru a script engine */
 475         int retval = ERROR_FAIL;
 476         int retcode;
 477         /* Beware! This code needs to be reentrant. It is also possible
 478          * for OpenOCD commands to be invoked directly from Tcl. This would
 479          * happen when the Jim Tcl interpreter is provided by eCos for
 480          * instance.
 481          */
 482         Jim_DeleteAssocData(interp, "context");
 483         retcode = Jim_SetAssocData(interp, "context", NULL, context);
 484         if (retcode == JIM_OK)
 485         {
 486                 /* associated the return value */
 487                 Jim_DeleteAssocData(interp, "retval");
 488                 retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
 489                 if (retcode == JIM_OK)
 490                 {
 491                         retcode = Jim_Eval_Named(interp, line, __THIS__FILE__, __LINE__);
 492
 493                         Jim_DeleteAssocData(interp, "retval");
 494                 }
 495                 Jim_DeleteAssocData(interp, "context");
 496         }
 497         if (retcode == JIM_ERR) {
 498                 if (retval != ERROR_COMMAND_CLOSE_CONNECTION)
 499                 {
 500                         /* We do not print the connection closed error message */
 501                         Jim_PrintErrorMessage(interp);
 502                 }
 503                 if (retval == ERROR_OK)
 504                 {
 505                         /* It wasn't a low level OpenOCD command that failed */
 506                         return ERROR_FAIL;
 507                 }
 508                 return retval;
 509         } else if (retcode == JIM_EXIT) {
 510                 /* ignore. */
 511                 /* exit(Jim_GetExitCode(interp)); */
 512         } else {
 513                 const char *result;
 514                 int reslen;
 515
 516                 result = Jim_GetString(Jim_GetResult(interp), &reslen);
 517                 if (reslen > 0)
 518                 {
 519                         int i;
 520                         char buff[256 + 1];
 521                         for (i = 0; i < reslen; i += 256)
 522                         {
 523                                 int chunk;
 524                                 chunk = reslen - i;
 525                                 if (chunk > 256)
 526                                         chunk = 256;
 527                                 strncpy(buff, result + i, chunk);
 528                                 buff[chunk] = 0;
 529                                 LOG_USER_N("%s", buff);
 530                         }
 531                         LOG_USER_N("%s", "\n");
 532                 }
 533                 retval = ERROR_OK;
 534         }
 535         return retval;
 536 }
 537
 538 int command_run_linef(struct command_context *context, const char *format, ...)
 539 {
 540         int retval = ERROR_FAIL;
 541         char *string;
 542         va_list ap;
 543         va_start(ap, format);
 544         string = alloc_vprintf(format, ap);
 545         if (string != NULL)
 546         {
 547                 retval = command_run_line(context, string);
 548         }
 549         va_end(ap);
 550         return retval;
 551 }
 552
 553 void command_set_output_handler(struct command_context* context,
 554                 command_output_handler_t output_handler, void *priv)
 555 {
 556         context->output_handler = output_handler;
 557         context->output_handler_priv = priv;
 558 }
 559
 560 struct command_context* copy_command_context(struct command_context* context)
 561 {
 562         struct command_context* copy_context = malloc(sizeof(struct command_context));
 563
 564         *copy_context = *context;
 565
 566         return copy_context;
 567 }
 568
 569 int command_done(struct command_context *context)
 570 {
 571         free(context);
 572         context = NULL;
 573
 574         return ERROR_OK;
 575 }
 576
 577 /* find full path to file */
 578 static int jim_find(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 579 {
 580         if (argc != 2)
 581                 return JIM_ERR;
 582         const char *file = Jim_GetString(argv[1], NULL);
 583         char *full_path = find_file(file);
 584         if (full_path == NULL)
 585                 return JIM_ERR;
 586         Jim_Obj *result = Jim_NewStringObj(interp, full_path, strlen(full_path));
 587         free(full_path);
 588
 589         Jim_SetResult(interp, result);
 590         return JIM_OK;
 591 }
 592
 593 static int jim_echo(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 594 {
 595         if (argc != 2)
 596                 return JIM_ERR;
 597         const char *str = Jim_GetString(argv[1], NULL);
 598         LOG_USER("%s", str);
 599         return JIM_OK;
 600 }
 601
 602 static size_t openocd_jim_fwrite(const void *_ptr, size_t size, size_t n, void *cookie)
 603 {
 604         size_t nbytes;
 605         const char *ptr;
 606         Jim_Interp *interp;
 607
 608         /* make it a char easier to read code */
 609         ptr = _ptr;
 610         interp = cookie;
 611         nbytes = size * n;
 612         if (ptr == NULL || interp == NULL || nbytes == 0) {
 613                 return 0;
 614         }
 615
 616         /* do we have to chunk it? */
 617         if (ptr[nbytes] == 0)
 618         {
 619                 /* no it is a C style string */
 620                 LOG_USER_N("%s", ptr);
 621                 return strlen(ptr);
 622         }
 623         /* GRR we must chunk - not null terminated */
 624         while (nbytes) {
 625                 char chunk[128 + 1];
 626                 int x;
 627
 628                 x = nbytes;
 629                 if (x > 128) {
 630                         x = 128;
 631                 }
 632                 /* copy it */
 633                 memcpy(chunk, ptr, x);
 634                 /* terminate it */
 635                 chunk[n] = 0;
 636                 /* output it */
 637                 LOG_USER_N("%s", chunk);
 638                 ptr += x;
 639                 nbytes -= x;
 640         }
 641
 642         return n;
 643 }
 644
 645 static size_t openocd_jim_fread(void *ptr, size_t size, size_t n, void *cookie)
 646 {
 647         /* TCL wants to read... tell him no */
 648         return 0;
 649 }
 650
 651 static int openocd_jim_vfprintf(void *cookie, const char *fmt, va_list ap)
 652 {
 653         char *cp;
 654         int n;
 655         Jim_Interp *interp;
 656
 657         n = -1;
 658         interp = cookie;
 659         if (interp == NULL)
 660                 return n;
 661
 662         cp = alloc_vprintf(fmt, ap);
 663         if (cp)
 664         {
 665                 LOG_USER_N("%s", cp);
 666                 n = strlen(cp);
 667                 free(cp);
 668         }
 669         return n;
 670 }
 671
 672 static int openocd_jim_fflush(void *cookie)
 673 {
 674         /* nothing to flush */
 675         return 0;
 676 }
 677
 678 static char* openocd_jim_fgets(char *s, int size, void *cookie)
 679 {
 680         /* not supported */
 681         errno = ENOTSUP;
 682         return NULL;
 683 }
 684
 685 static int jim_capture(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 686 {
 687         if (argc != 2)
 688                 return JIM_ERR;
 689         int retcode;
 690         const char *str = Jim_GetString(argv[1], NULL);
 691
 692         /* capture log output and return it */
 693         Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
 694         /* a garbage collect can happen, so we need a reference count to this object */
 695         Jim_IncrRefCount(tclOutput);
 696
 697         log_add_callback(tcl_output, tclOutput);
 698
 699         retcode = Jim_Eval_Named(interp, str, __THIS__FILE__, __LINE__);
 700
 701         log_remove_callback(tcl_output, tclOutput);
 702
 703         /* We dump output into this local variable */
 704         Jim_SetResult(interp, tclOutput);
 705         Jim_DecrRefCount(interp, tclOutput);
 706
 707         return retcode;
 708 }
 709
 710 static COMMAND_HELPER(command_help_find, struct command *head,
 711                 struct command **out)
 712 {
 713         if (0 == CMD_ARGC)
 714                 return ERROR_INVALID_ARGUMENTS;
 715         *out = command_find(head, CMD_ARGV[0]);
 716         if (NULL == *out)
 717                 return ERROR_INVALID_ARGUMENTS;
 718         if (--CMD_ARGC == 0)
 719                 return ERROR_OK;
 720         CMD_ARGV++;
 721         return CALL_COMMAND_HANDLER(command_help_find, (*out)->children, out);
 722 }
 723
 724 static COMMAND_HELPER(command_help_show, struct command *c, unsigned n);
 725
 726 static COMMAND_HELPER(command_help_show_list, struct command *head, unsigned n)
 727 {
 728         for (struct command *c = head; NULL != c; c = c->next)
 729                 CALL_COMMAND_HANDLER(command_help_show, c, n);
 730         return ERROR_OK;
 731 }
 732 static COMMAND_HELPER(command_help_show, struct command *c, unsigned n)
 733 {
 734         command_run_linef(CMD_CTX, "cmd_help {%s} {%s} %d", command_name(c, ' '),
 735                         c->help ? : "no help available", n);
 736
 737         if (++n >= 2)
 738                 return ERROR_OK;
 739
 740         return CALL_COMMAND_HANDLER(command_help_show_list, c->children, n);
 741 }
 742 COMMAND_HANDLER(handle_help_command)
 743 {
 744         struct command *c = CMD_CTX->commands;
 745
 746         if (0 == CMD_ARGC)
 747                 return CALL_COMMAND_HANDLER(command_help_show_list, c, 0);
 748
 749         int retval = CALL_COMMAND_HANDLER(command_help_find, c, &c);
 750         if (ERROR_OK != retval)
 751                 return retval;
 752
 753         return CALL_COMMAND_HANDLER(command_help_show, c, 0);
 754 }
 755
 756
 757 int help_add_command(struct command_context *cmd_ctx, struct command *parent,
 758                 const char *cmd_name, const char *help_text)
 759 {
 760         struct command **head = command_list_for_parent(cmd_ctx, parent);
 761         struct command *nc = command_find(*head, cmd_name);
 762         if (NULL == nc)
 763         {
 764                 // add a new command with help text
 765                 nc = register_command(cmd_ctx, parent, cmd_name,
 766                                 NULL, COMMAND_ANY, help_text);
 767                 if (NULL == nc)
 768                 {
 769                         LOG_ERROR("failed to add '%s' help text", cmd_name);
 770                         return ERROR_FAIL;
 771                 }
 772                 LOG_DEBUG("added '%s' help text", cmd_name);
 773         }
 774         else
 775         {
 776                 bool replaced = false;
 777                 if (nc->help)
 778                 {
 779                         free((void *)nc->help);
 780                         replaced = true;
 781                 }
 782                 nc->help = strdup(help_text);
 783
 784                 if (replaced)
 785                         LOG_INFO("replaced existing '%s' help", cmd_name);
 786                 else
 787                         LOG_DEBUG("added '%s' help text", cmd_name);
 788         }
 789         return ERROR_OK;
 790 }
 791
 792 COMMAND_HANDLER(handle_help_add_command)
 793 {
 794         if (CMD_ARGC < 2)
 795         {
 796                 LOG_ERROR("%s: insufficient arguments", CMD_NAME);
 797                 return ERROR_INVALID_ARGUMENTS;
 798         }
 799
 800         // save help text and remove it from argument list
 801         const char *help_text = CMD_ARGV[--CMD_ARGC];
 802         // likewise for the leaf command name
 803         const char *cmd_name = CMD_ARGV[--CMD_ARGC];
 804
 805         struct command *c = NULL;
 806         if (CMD_ARGC > 0)
 807         {
 808                 c = CMD_CTX->commands;
 809                 int retval = CALL_COMMAND_HANDLER(command_help_find, c, &c);
 810                 if (ERROR_OK != retval)
 811                         return retval;
 812         }
 813         return help_add_command(CMD_CTX, c, cmd_name, help_text);
 814 }
 815
 816 /* sleep command sleeps for <n> miliseconds
 817  * this is useful in target startup scripts
 818  */
 819 COMMAND_HANDLER(handle_sleep_command)
 820 {
 821         bool busy = false;
 822         if (CMD_ARGC == 2)
 823         {
 824                 if (strcmp(CMD_ARGV[1], "busy") == 0)
 825                         busy = true;
 826                 else
 827                         return ERROR_COMMAND_SYNTAX_ERROR;
 828         }
 829         else if (CMD_ARGC < 1 || CMD_ARGC > 2)
 830                 return ERROR_COMMAND_SYNTAX_ERROR;
 831
 832         unsigned long duration = 0;
 833         int retval = parse_ulong(CMD_ARGV[0], &duration);
 834         if (ERROR_OK != retval)
 835                 return retval;
 836
 837         if (!busy)
 838         {
 839                 long long then = timeval_ms();
 840                 while (timeval_ms() - then < (long long)duration)
 841                 {
 842                         target_call_timer_callbacks_now();
 843                         usleep(1000);
 844                 }
 845         }
 846         else
 847                 busy_sleep(duration);
 848
 849         return ERROR_OK;
 850 }
 851
 852 struct command_context* command_init(const char *startup_tcl)
 853 {
 854         struct command_context* context = malloc(sizeof(struct command_context));
 855         const char *HostOs;
 856
 857         context->mode = COMMAND_EXEC;
 858         context->commands = NULL;
 859         context->current_target = 0;
 860         context->output_handler = NULL;
 861         context->output_handler_priv = NULL;
 862
 863 #if !BUILD_ECOSBOARD
 864         Jim_InitEmbedded();
 865         /* Create an interpreter */
 866         interp = Jim_CreateInterp();
 867         /* Add all the Jim core commands */
 868         Jim_RegisterCoreCommands(interp);
 869 #endif
 870
 871 #if defined(_MSC_VER)
 872         /* WinXX - is generic, the forward
 873          * looking problem is this:
 874          *
 875          *   "win32" or "win64"
 876          *
 877          * "winxx" is generic.
 878          */
 879         HostOs = "winxx";
 880 #elif defined(__linux__)
 881         HostOs = "linux";
 882 #elif defined(__DARWIN__)
 883         HostOs = "darwin";
 884 #elif defined(__CYGWIN__)
 885         HostOs = "cygwin";
 886 #elif defined(__MINGW32__)
 887         HostOs = "mingw32";
 888 #elif defined(__ECOS)
 889         HostOs = "ecos";
 890 #else
 891 #warn unrecognized host OS...
 892         HostOs = "other";
 893 #endif
 894         Jim_SetGlobalVariableStr(interp, "ocd_HOSTOS",
 895                         Jim_NewStringObj(interp, HostOs , strlen(HostOs)));
 896
 897         Jim_CreateCommand(interp, "ocd_find", jim_find, NULL, NULL);
 898         Jim_CreateCommand(interp, "echo", jim_echo, NULL, NULL);
 899         Jim_CreateCommand(interp, "capture", jim_capture, NULL, NULL);
 900
 901         /* Set Jim's STDIO */
 902         interp->cookie_stdin = interp;
 903         interp->cookie_stdout = interp;
 904         interp->cookie_stderr = interp;
 905         interp->cb_fwrite = openocd_jim_fwrite;
 906         interp->cb_fread = openocd_jim_fread ;
 907         interp->cb_vfprintf = openocd_jim_vfprintf;
 908         interp->cb_fflush = openocd_jim_fflush;
 909         interp->cb_fgets = openocd_jim_fgets;
 910
 911         COMMAND_REGISTER(context, NULL, "add_help_text",
 912                         handle_help_add_command, COMMAND_ANY,
 913                         "<command> [...] <help_text>] - "
 914                         "add new command help text");
 915
 916 #if !BUILD_ECOSBOARD
 917         Jim_EventLoopOnLoad(interp);
 918 #endif
 919         Jim_SetAssocData(interp, "context", NULL, context);
 920         if (Jim_Eval_Named(interp, startup_tcl, "embedded:startup.tcl",1) == JIM_ERR)
 921         {
 922                 LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD)");
 923                 Jim_PrintErrorMessage(interp);
 924                 exit(-1);
 925         }
 926         Jim_DeleteAssocData(interp, "context");
 927
 928         COMMAND_REGISTER(context, NULL, "sleep",
 929                         handle_sleep_command, COMMAND_ANY,
 930                         "<n> [busy] - sleep for n milliseconds. "
 931                         "\"busy\" means busy wait");
 932
 933         COMMAND_REGISTER(context, NULL, "help",
 934                         &handle_help_command, COMMAND_ANY,
 935                         "[<command_name> ...] - show built-in command help");
 936
 937         return context;
 938 }
 939
 940 int command_context_mode(struct command_context *cmd_ctx, enum command_mode mode)
 941 {
 942         if (!cmd_ctx)
 943                 return ERROR_INVALID_ARGUMENTS;
 944
 945         cmd_ctx->mode = mode;
 946         return ERROR_OK;
 947 }
 948
 949 void process_jim_events(void)
 950 {
 951 #if !BUILD_ECOSBOARD
 952         static int recursion = 0;
 953
 954         if (!recursion)
 955         {
 956                 recursion++;
 957                 Jim_ProcessEvents (interp, JIM_ALL_EVENTS | JIM_DONT_WAIT);
 958                 recursion--;
 959         }
 960 #endif
 961 }
 962
 963 void register_jim(struct command_context *cmd_ctx, const char *name,
 964                 Jim_CmdProc cmd, const char *help)
 965 {
 966         Jim_CreateCommand(interp, name, cmd, NULL, NULL);
 967
 968         Jim_Obj *cmd_list = Jim_NewListObj(interp, NULL, 0);
 969         Jim_ListAppendElement(interp, cmd_list,
 970                         Jim_NewStringObj(interp, name, -1));
 971
 972         help_add_command(cmd_ctx, NULL, name, help);
 973 }
 974
 975 #define DEFINE_PARSE_NUM_TYPE(name, type, func, min, max) \
 976         int parse##name(const char *str, type *ul) \
 977         { \
 978                 if (!*str) \
 979                 { \
 980                         LOG_ERROR("Invalid command argument"); \
 981                         return ERROR_COMMAND_ARGUMENT_INVALID; \
 982                 } \
 983                 char *end; \
 984                 *ul = func(str, &end, 0); \
 985                 if (*end) \
 986                 { \
 987                         LOG_ERROR("Invalid command argument"); \
 988                         return ERROR_COMMAND_ARGUMENT_INVALID; \
 989                 } \
 990                 if ((max == *ul) && (ERANGE == errno)) \
 991                 { \
 992                         LOG_ERROR("Argument overflow"); \
 993                         return ERROR_COMMAND_ARGUMENT_OVERFLOW; \
 994                 } \
 995                 if (min && (min == *ul) && (ERANGE == errno)) \
 996                 { \
 997                         LOG_ERROR("Argument underflow"); \
 998                         return ERROR_COMMAND_ARGUMENT_UNDERFLOW; \
 999                 } \
1000                 return ERROR_OK; \
1001         }
1002 DEFINE_PARSE_NUM_TYPE(_ulong, unsigned long , strtoul, 0, ULONG_MAX)
1003 DEFINE_PARSE_NUM_TYPE(_ullong, unsigned long long, strtoull, 0, ULLONG_MAX)
1004 DEFINE_PARSE_NUM_TYPE(_long, long , strtol, LONG_MIN, LONG_MAX)
1005 DEFINE_PARSE_NUM_TYPE(_llong, long long, strtoll, LLONG_MIN, LLONG_MAX)
1006
1007 #define DEFINE_PARSE_WRAPPER(name, type, min, max, functype, funcname) \
1008         int parse##name(const char *str, type *ul) \
1009         { \
1010                 functype n; \
1011                 int retval = parse##funcname(str, &n); \
1012                 if (ERROR_OK != retval) \
1013                         return retval; \
1014                 if (n > max) \
1015                         return ERROR_COMMAND_ARGUMENT_OVERFLOW; \
1016                 if (min) \
1017                         return ERROR_COMMAND_ARGUMENT_UNDERFLOW; \
1018                 *ul = n; \
1019                 return ERROR_OK; \
1020         }
1021
1022 #define DEFINE_PARSE_ULONG(name, type, min, max) \
1023         DEFINE_PARSE_WRAPPER(name, type, min, max, unsigned long, _ulong)
1024 DEFINE_PARSE_ULONG(_uint, unsigned, 0, UINT_MAX)
1025 DEFINE_PARSE_ULONG(_u32, uint32_t, 0, UINT32_MAX)
1026 DEFINE_PARSE_ULONG(_u16, uint16_t, 0, UINT16_MAX)
1027 DEFINE_PARSE_ULONG(_u8, uint8_t, 0, UINT8_MAX)
1028
1029 #define DEFINE_PARSE_LONG(name, type, min, max) \
1030         DEFINE_PARSE_WRAPPER(name, type, min, max, long, _long)
1031 DEFINE_PARSE_LONG(_int, int, n < INT_MIN, INT_MAX)
1032 DEFINE_PARSE_LONG(_s32, int32_t, n < INT32_MIN, INT32_MAX)
1033 DEFINE_PARSE_LONG(_s16, int16_t, n < INT16_MIN, INT16_MAX)
1034 DEFINE_PARSE_LONG(_s8, int8_t, n < INT8_MIN, INT8_MAX)
1035
1036 static int command_parse_bool(const char *in, bool *out,
1037                 const char *on, const char *off)
1038 {
1039         if (strcasecmp(in, on) == 0)
1040                 *out = true;
1041         else if (strcasecmp(in, off) == 0)
1042                 *out = false;
1043         else
1044                 return ERROR_COMMAND_SYNTAX_ERROR;
1045         return  ERROR_OK;
1046 }
1047
1048 int command_parse_bool_arg(const char *in, bool *out)
1049 {
1050         if (command_parse_bool(in, out, "on", "off") == ERROR_OK)
1051                 return ERROR_OK;
1052         if (command_parse_bool(in, out, "enable", "disable") == ERROR_OK)
1053                 return ERROR_OK;
1054         if (command_parse_bool(in, out, "true", "false") == ERROR_OK)
1055                 return ERROR_OK;
1056         if (command_parse_bool(in, out, "yes", "no") == ERROR_OK)
1057                 return ERROR_OK;
1058         if (command_parse_bool(in, out, "1", "0") == ERROR_OK)
1059                 return ERROR_OK;
1060         return ERROR_INVALID_ARGUMENTS;
1061 }
1062
1063 COMMAND_HELPER(handle_command_parse_bool, bool *out, const char *label)
1064 {
1065         switch (CMD_ARGC) {
1066         case 1: {
1067                 const char *in = CMD_ARGV[0];
1068                 if (command_parse_bool_arg(in, out) != ERROR_OK)
1069                 {
1070                         LOG_ERROR("%s: argument '%s' is not valid", CMD_NAME, in);
1071                         return ERROR_INVALID_ARGUMENTS;
1072                 }
1073                 // fall through
1074         }
1075         case 0:
1076                 LOG_INFO("%s is %s", label, *out ? "enabled" : "disabled");
1077                 break;
1078         default:
1079                 return ERROR_INVALID_ARGUMENTS;
1080         }
1081         return ERROR_OK;
1082 }