osfmk/ddb/db_command.c

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58 /*
  59  *      Author: David B. Golub, Carnegie Mellon University
  60  *      Date:   7/90
  61  */
  62
  63 /*
  64  * Command dispatcher.
  65  */
  66 #include <norma_vm.h>
  67 #ifdef  AT386
  68 #include <norma_scsi.h>
  69 #endif  /* AT386 */
  70
  71 #include <mach/boolean.h>
  72 #include <string.h>
  73 #include <machine/db_machdep.h>
  74
  75 #if defined(__alpha)
  76 #  include <kdebug.h>
  77 #  if KDEBUG
  78 #    include <machine/kdebug.h>
  79 #  endif
  80 #endif /* defined(__alpha) */
  81
  82 #include <ddb/db_lex.h>
  83 #include <ddb/db_output.h>
  84 #include <ddb/db_break.h>
  85 #include <ddb/db_command.h>
  86 #include <ddb/db_cond.h>
  87 #include <ddb/db_examine.h>
  88 #include <ddb/db_expr.h>
  89 #include <ppc/db_low_trace.h>
  90 #include <ddb/db_macro.h>
  91 #include <ddb/db_print.h>
  92 #include <ddb/db_run.h>
  93 #include <ddb/db_task_thread.h>
  94 #include <ddb/db_variables.h>
  95 #include <ddb/db_watch.h>
  96 #include <ddb/db_write_cmd.h>
  97 #include <ddb/tr.h>
  98
  99 #include <machine/setjmp.h>
 100 #include <kern/thread.h>
 101
 102 #include <kern/misc_protos.h>
 103 #include <vm/vm_print.h>
 104 #include <ipc/ipc_print.h>
 105 #include <kern/kern_print.h>
 106 #include <machine/db_machdep.h>         /* For db_stack_trace_cmd(). */
 107 #include <kern/zalloc.h>        /* For db_show_one_zone, db_show_all_zones. */
 108 #include <kern/lock.h>                  /* For db_show_all_slocks(). */
 109
 110 #if     NORMA_VM
 111 #include <xmm/xmm_obj.h>
 112 #endif  /* NORMA_VM */
 113
 114 /*
 115  * Exported global variables
 116  */
 117 boolean_t       db_cmd_loop_done;
 118 jmp_buf_t       *db_recover = 0;
 119 db_addr_t       db_dot;
 120 db_addr_t       db_last_addr;
 121 db_addr_t       db_prev;
 122 db_addr_t       db_next;
 123
 124 /*
 125  * if 'ed' style: 'dot' is set at start of last item printed,
 126  * and '+' points to next line.
 127  * Otherwise: 'dot' points to next item, '..' points to last.
 128  */
 129 boolean_t       db_ed_style = TRUE;
 130
 131 /*
 132  * Results of command search.
 133  */
 134 #define CMD_UNIQUE      0
 135 #define CMD_FOUND       1
 136 #define CMD_NONE        2
 137 #define CMD_AMBIGUOUS   3
 138 #define CMD_HELP        4
 139
 140 /* Prototypes for functions local to this file.  XXX -- should be static!
 141  */
 142
 143 void db_command(
 144         struct db_command       **last_cmdp,    /* IN_OUT */
 145         db_expr_t               *last_countp,   /* IN_OUT */
 146         char                    *last_modifp,   /* IN_OUT */
 147         struct db_command       *cmd_table);
 148
 149 void db_help_cmd(void);
 150
 151 void db_output_prompt(void);
 152
 153 void db_fncall(void);
 154
 155 void db_cmd_list(struct db_command *table);
 156
 157 int db_cmd_search(
 158         char *                  name,
 159         struct db_command *     table,
 160         struct db_command **    cmdp);  /* out */
 161
 162 void db_command_list(
 163         struct db_command       **last_cmdp,    /* IN_OUT */
 164         db_expr_t               *last_countp,   /* IN_OUT */
 165         char                    *last_modifp,   /* IN_OUT */
 166         struct db_command       *cmd_table);
 167
 168 /*
 169  * Search for command prefix.
 170  */
 171 int
 172 db_cmd_search(
 173         char *                  name,
 174         struct db_command *     table,
 175         struct db_command **    cmdp)   /* out */
 176 {
 177         struct db_command       *cmd;
 178         int             result = CMD_NONE;
 179
 180         for (cmd = table; cmd->name != 0; cmd++) {
 181             register char *lp;
 182             register char *rp;
 183             register int  c;
 184
 185             lp = name;
 186             rp = cmd->name;
 187             while ((c = *lp) == *rp) {
 188                 if (c == 0) {
 189                     /* complete match */
 190                     *cmdp = cmd;
 191                     return (CMD_UNIQUE);
 192                 }
 193                 lp++;
 194                 rp++;
 195             }
 196             if (c == 0) {
 197                 /* end of name, not end of command -
 198                    partial match */
 199                 if (result == CMD_FOUND) {
 200                     result = CMD_AMBIGUOUS;
 201                     /* but keep looking for a full match -
 202                        this lets us match single letters */
 203                 }
 204                 else {
 205                     *cmdp = cmd;
 206                     result = CMD_FOUND;
 207                 }
 208             }
 209         }
 210         if (result == CMD_NONE) {
 211             /* check for 'help' */
 212             if (!strncmp(name, "help", strlen(name)))
 213                 result = CMD_HELP;
 214         }
 215         return (result);
 216 }
 217
 218 void
 219 db_cmd_list(struct db_command *table)
 220 {
 221         register struct db_command *new;
 222         register struct db_command *old;
 223         register struct db_command *cur;
 224         unsigned int l;
 225         unsigned int len;
 226
 227         len = 1;
 228         for (cur = table; cur->name != 0; cur++)
 229             if ((l = strlen(cur->name)) >= len)
 230                 len = l + 1;
 231
 232         old = (struct db_command *)0;
 233         for (;;) {
 234             new = (struct db_command *)0;
 235             for (cur = table; cur->name != 0; cur++)
 236                 if ((new == (struct db_command *)0 ||
 237                      strcmp(cur->name, new->name) < 0) &&
 238                     (old == (struct db_command *)0 ||
 239                      strcmp(cur->name, old->name) > 0))
 240                     new = cur;
 241             if (new == (struct db_command *)0)
 242                     return;
 243             db_reserve_output_position(len);
 244             db_printf("%-*s", len, new->name);
 245             old = new;
 246         }
 247 }
 248
 249 void
 250 db_command(
 251         struct db_command       **last_cmdp,    /* IN_OUT */
 252         db_expr_t               *last_countp,   /* IN_OUT */
 253         char                    *last_modifp,   /* IN_OUT */
 254         struct db_command       *cmd_table)
 255 {
 256         struct db_command       *cmd;
 257         int             t;
 258         char            modif[TOK_STRING_SIZE];
 259         char            *modifp = &modif[0];
 260         db_expr_t       addr, count;
 261         boolean_t       have_addr;
 262         int             result;
 263
 264         t = db_read_token();
 265         if (t == tEOL || t == tSEMI_COLON) {
 266             /* empty line repeats last command, at 'next' */
 267             cmd = *last_cmdp;
 268             count = *last_countp;
 269             modifp = last_modifp;
 270             addr = (db_expr_t)db_next;
 271             have_addr = FALSE;
 272             if (t == tSEMI_COLON)
 273                 db_unread_token(t);
 274         }
 275         else if (t == tEXCL) {
 276             db_fncall();
 277             return;
 278         }
 279         else if (t != tIDENT) {
 280             db_printf("?\n");
 281             db_flush_lex();
 282             return;
 283         }
 284         else {
 285             /*
 286              * Search for command
 287              */
 288             while (cmd_table) {
 289                 result = db_cmd_search(db_tok_string,
 290                                        cmd_table,
 291                                        &cmd);
 292                 switch (result) {
 293                     case CMD_NONE:
 294                         if (db_exec_macro(db_tok_string) == 0)
 295                             return;
 296                         db_printf("No such command \"%s\"\n", db_tok_string);
 297                         db_flush_lex();
 298                         return;
 299                     case CMD_AMBIGUOUS:
 300                         db_printf("Ambiguous\n");
 301                         db_flush_lex();
 302                         return;
 303                     case CMD_HELP:
 304                         db_cmd_list(cmd_table);
 305                         db_flush_lex();
 306                         return;
 307                     default:
 308                         break;
 309                 }
 310                 if ((cmd_table = cmd->more) != 0) {
 311                     t = db_read_token();
 312                     if (t != tIDENT) {
 313                         db_cmd_list(cmd_table);
 314                         db_flush_lex();
 315                         return;
 316                     }
 317                 }
 318             }
 319
 320             if ((cmd->flag & CS_OWN) == 0) {
 321                 /*
 322                  * Standard syntax:
 323                  * command [/modifier] [addr] [,count]
 324                  */
 325                 t = db_read_token();
 326                 if (t == tSLASH) {
 327                     t = db_read_token();
 328                     if (t != tIDENT) {
 329                         db_printf("Bad modifier \"/%s\"\n", db_tok_string);
 330                         db_flush_lex();
 331                         return;
 332                     }
 333                     strcpy(modif, db_tok_string);
 334                 }
 335                 else {
 336                     db_unread_token(t);
 337                     modif[0] = '\0';
 338                 }
 339
 340                 if (db_expression(&addr)) {
 341                     db_dot = (db_addr_t) addr;
 342                     db_last_addr = db_dot;
 343                     have_addr = TRUE;
 344                 }
 345                 else {
 346                     addr = (db_expr_t) db_dot;
 347                     have_addr = FALSE;
 348                 }
 349                 t = db_read_token();
 350                 if (t == tCOMMA) {
 351                     if (!db_expression(&count)) {
 352                         db_printf("Count missing after ','\n");
 353                         db_flush_lex();
 354                         return;
 355                     }
 356                 }
 357                 else {
 358                     db_unread_token(t);
 359                     count = -1;
 360                 }
 361             }
 362         }
 363         if (cmd != 0) {
 364             /*
 365              * Execute the command.
 366              */
 367             (*cmd->fcn)(addr, have_addr, count, modifp);
 368
 369             if (cmd->flag & CS_SET_DOT) {
 370                 /*
 371                  * If command changes dot, set dot to
 372                  * previous address displayed (if 'ed' style).
 373                  */
 374                 if (db_ed_style) {
 375                     db_dot = db_prev;
 376                 }
 377                 else {
 378                     db_dot = db_next;
 379                 }
 380             }
 381             else {
 382                 /*
 383                  * If command does not change dot,
 384                  * set 'next' location to be the same.
 385                  */
 386                 db_next = db_dot;
 387             }
 388         }
 389         *last_cmdp = cmd;
 390         *last_countp = count;
 391         strcpy(last_modifp, modifp);
 392 }
 393
 394 void
 395 db_command_list(
 396         struct db_command       **last_cmdp,    /* IN_OUT */
 397         db_expr_t               *last_countp,   /* IN_OUT */
 398         char                    *last_modifp,   /* IN_OUT */
 399         struct db_command       *cmd_table)
 400 {
 401         do {
 402             db_command(last_cmdp, last_countp, last_modifp, cmd_table);
 403             db_skip_to_eol();
 404         } while (db_read_token() == tSEMI_COLON && db_cmd_loop_done == 0);
 405 }
 406
 407
 408 extern void     db_system_stats(void);
 409
 410 struct db_command db_show_all_cmds[] = {
 411         { "acts",       db_show_all_acts,                       0,      0 },
 412         { "spaces",     db_show_all_spaces,                     0,      0 },
 413         { "tasks",      db_show_all_acts,                       0,      0 },
 414         /* temporary alias for sanity preservation */
 415         { "threads",    db_show_all_acts,                       0,      0 },
 416         { "zones",      db_show_all_zones,                      0,      0 },
 417         { "vmtask",     db_show_all_task_vm,                    0,      0 },
 418         { (char *)0 }
 419 };
 420
 421 /* XXX */
 422
 423 extern void             db_show_thread_log(void);
 424 extern void             db_show_one_lock(lock_t*);
 425 extern void             db_show_etap_log(db_expr_t, int, db_expr_t, char *);
 426
 427 struct db_command db_show_cmds[] = {
 428         { "all",        0,                              0,      db_show_all_cmds },
 429         { "registers",  db_show_regs,                   0,      0 },
 430         { "variables",  (db_func) db_show_variable,     CS_OWN, 0 },
 431         { "breaks",     (db_func) db_listbreak_cmd,     0,      0 },
 432         { "watches",    (db_func) db_listwatch_cmd,     0,      0 },
 433         { "task",       db_show_one_task,               0,      0 },
 434         { "act",        db_show_one_act,                0,      0 },
 435         { "shuttle",    db_show_shuttle,                0,      0 },
 436 #if 0
 437         { "thread",     db_show_one_thread,             0,      0 },
 438 #endif
 439         { "vmtask",     db_show_one_task_vm,            0,      0 },
 440         { "macro",      (db_func) db_show_macro,        CS_OWN, 0 },
 441         { "runq",       (db_func) db_show_runq,         0,      0 },
 442         { "map",        (db_func) vm_map_print,         0,      0 },
 443         { "object",     (db_func) vm_object_print,      0,      0 },
 444         { "page",       (db_func) vm_page_print,        0,      0 },
 445         { "copy",       (db_func) vm_map_copy_print,    0,      0 },
 446         { "port",       (db_func) ipc_port_print,       0,      0 },
 447         { "pset",       (db_func) ipc_pset_print,       0,      0 },
 448         { "kmsg",       (db_func) ipc_kmsg_print,       0,      0 },
 449         { "msg",        (db_func) ipc_msg_print,        0,      0 },
 450         { "ipc_port",   db_show_port_id,                0,      0 },
 451 #if     NORMA_VM
 452         { "xmm_obj",    (db_func) xmm_obj_print,        0,      0 },
 453         { "xmm_reply",  (db_func) xmm_reply_print,      0,      0 },
 454 #endif  /* NORMA_VM */
 455 #if     TRACE_BUFFER
 456         { "tr",         db_show_tr,                     0,      0 },
 457 #endif  /* TRACE_BUFFER */
 458         { "space",      db_show_one_space,              0,      0 },
 459         { "system",     (db_func) db_system_stats,      0,      0 },
 460         { "zone",       db_show_one_zone,               0,      0 },
 461         { "lock",       (db_func)db_show_one_lock,      0,      0 },
 462         { "mutex_lock", (db_func)db_show_one_mutex,     0,      0 },
 463         { "simple_lock", (db_func)db_show_one_simple_lock,      0,      0 },
 464         { "thread_log", (db_func)db_show_thread_log,    0,      0 },
 465         { "shuttle",    db_show_shuttle,                0,      0 },
 466         { (char *)0, }
 467 };
 468
 469 #define db_switch_cpu kdb_on
 470 extern void     db_switch_cpu(int);
 471
 472 struct db_command db_command_table[] = {
 473 #if DB_MACHINE_COMMANDS
 474
 475 /* this must be the first entry, if it exists */
 476         { "machine",    0,                              0,                      0 },
 477 #endif
 478         { "print",      (db_func) db_print_cmd,         CS_OWN,                 0 },
 479         { "examine",    db_examine_cmd,                 CS_MORE|CS_SET_DOT,     0 },
 480         { "x",          db_examine_cmd,                 CS_MORE|CS_SET_DOT,     0 },
 481         { "xf",         db_examine_forward,             CS_SET_DOT,             0 },
 482         { "xb",         db_examine_backward,            CS_SET_DOT,             0 },
 483         { "search",     (db_func) db_search_cmd,        CS_OWN|CS_SET_DOT,      0 },
 484         { "set",        (db_func) db_set_cmd,           CS_OWN,                 0 },
 485         { "write",      db_write_cmd,                   CS_MORE|CS_SET_DOT,     0 },
 486         { "w",          db_write_cmd,                   CS_MORE|CS_SET_DOT,     0 },
 487         { "delete",     (db_func) db_delete_cmd,        CS_OWN,                 0 },
 488         { "d",          (db_func) db_delete_cmd,        CS_OWN,                 0 },
 489         { "break",      db_breakpoint_cmd,              CS_MORE,                0 },
 490         { "dwatch",     db_deletewatch_cmd,             CS_MORE,                0 },
 491         { "watch",      db_watchpoint_cmd,              CS_MORE,                0 },
 492         { "step",       db_single_step_cmd,             0,                      0 },
 493         { "s",          db_single_step_cmd,             0,                      0 },
 494         { "continue",   db_continue_cmd,                0,                      0 },
 495         { "c",          db_continue_cmd,                0,                      0 },
 496         { "gdb",        db_continue_gdb,                0,                      0 },
 497         { "until",      db_trace_until_call_cmd,        0,                      0 },
 498
 499         /* As per request of DNoveck, CR1550, leave this disabled       */
 500 #if 0   /* until CR1440 is fixed, to avoid toe-stubbing                 */
 501         { "next",       db_trace_until_matching_cmd,    0,                      0 },
 502 #endif
 503         { "match",      db_trace_until_matching_cmd,    0       ,               0 },
 504         { "trace",      db_stack_trace_cmd,             0,                      0 },
 505         { "cond",       (db_func) db_cond_cmd,          CS_OWN,                 0 },
 506         { "call",       (db_func) db_fncall,            CS_OWN,                 0 },
 507         { "macro",      (db_func) db_def_macro_cmd,     CS_OWN,                 0 },
 508         { "dmacro",     (db_func) db_del_macro_cmd,     CS_OWN,                 0 },
 509         { "show",       0,                              0,                      db_show_cmds },
 510         { "cpu",        (db_func) db_switch_cpu,        0,                      0 },
 511         { "dr",         db_display_real,                CS_MORE|CS_SET_DOT,     0 },
 512         { "di",         db_display_iokit,               CS_MORE,                        0 },
 513         { "dk",         db_display_kmod,                CS_MORE,                        0 },
 514
 515         { "reboot",     (db_func) db_reboot,            0,                      0 },
 516 #if !defined(__ppc__)
 517         { "pm",         db_pmgr,                                CS_MORE,                        0 },
 518         { "na",         db_nap,                                 CS_MORE,                        0 },
 519         { "ms",         db_msr,                                 CS_MORE,                        0 },
 520         { "cp",         db_cpuid,                               CS_MORE,                        0 },
 521         { "da",         db_apic,                                CS_MORE,                        0 },
 522         { "ts",         db_test,                                CS_MORE,                        0 },
 523         { "dn",         db_intcnt,                              CS_MORE,                        0 },
 524         { "hp",         db_hpet,                                CS_MORE,                        0 },
 525         { "cf",         db_cfg,                                 CS_MORE,                        0 },
 526         { "dt",         db_dtimers,                             CS_MORE,                        0 },
 527 #endif
 528 #if defined(__ppc__)
 529         { "lt",         db_low_trace,                   CS_MORE|CS_SET_DOT,     0 },
 530         { "dl",         db_display_long,                CS_MORE|CS_SET_DOT,     0 },
 531         { "dc",         db_display_char,                CS_MORE|CS_SET_DOT,     0 },
 532         { "dv",         db_display_virtual,             CS_MORE|CS_SET_DOT,     0 },
 533         { "dm",         db_display_mappings,    CS_MORE|CS_SET_DOT,     0 },
 534         { "dh",         db_display_hash,                CS_MORE|CS_SET_DOT,     0 },
 535         { "dp",         db_display_pmap,                CS_MORE,                        0 },
 536         { "ds",         db_display_save,                CS_MORE|CS_SET_DOT,     0 },
 537         { "dx",         db_display_xregs,               CS_MORE|CS_SET_DOT,     0 },
 538         { "gs",         db_gsnoop,                              CS_MORE,                        0 },
 539         { "cm",         db_check_mappings,              CS_MORE,                        0 },
 540         { "cp",         db_check_pmaps,                 CS_MORE,                        0 },
 541 #endif
 542         { (char *)0, }
 543 };
 544
 545 /* this function should be called to install the machine dependent
 546    commands. It should be called before the debugger is enabled  */
 547 void db_machine_commands_install(struct db_command *ptr)
 548 {
 549   db_command_table[0].more = ptr;
 550   return;
 551 }
 552
 553
 554 struct db_command       *db_last_command = 0;
 555 db_expr_t               db_last_count = 0;
 556 char                    db_last_modifier[TOK_STRING_SIZE] = { '\0' };
 557
 558 void
 559 db_help_cmd(void)
 560 {
 561         struct db_command *cmd = db_command_table;
 562
 563         while (cmd->name != 0) {
 564             db_printf("%-12s", cmd->name);
 565             db_end_line();
 566             cmd++;
 567         }
 568 }
 569
 570 int     (*ddb_display)(void);
 571
 572 void
 573 db_command_loop(void)
 574 {
 575         jmp_buf_t db_jmpbuf;
 576         jmp_buf_t *prev = db_recover;
 577         extern int db_output_line;
 578         extern int db_macro_level;
 579         extern int db_indent;
 580
 581         /*
 582          * Initialize 'prev' and 'next' to dot.
 583          */
 584         db_prev = db_dot;
 585         db_next = db_dot;
 586
 587         if (ddb_display)
 588                 (*ddb_display)();
 589
 590         db_cmd_loop_done = 0;
 591         while (!db_cmd_loop_done) {
 592             (void) _setjmp(db_recover = &db_jmpbuf);
 593             db_macro_level = 0;
 594             if (db_print_position() != 0)
 595                 db_printf("\n");
 596             db_output_line = 0;
 597             db_indent = 0;
 598             db_reset_more();
 599             db_output_prompt();
 600
 601             (void) db_read_line("!!");
 602             db_command_list(&db_last_command, &db_last_count,
 603                             db_last_modifier, db_command_table);
 604         }
 605
 606         db_recover = prev;
 607 }
 608
 609 boolean_t
 610 db_exec_cmd_nest(
 611         const char      *cmd,
 612         int             size)
 613 {
 614         struct db_lex_context lex_context;
 615
 616         db_cmd_loop_done = 0;
 617         if (cmd) {
 618             db_save_lex_context(&lex_context);
 619             db_switch_input(cmd, size);
 620         }
 621         db_command_list(&db_last_command, &db_last_count,
 622                         db_last_modifier, db_command_table);
 623         if (cmd)
 624             db_restore_lex_context(&lex_context);
 625         return(db_cmd_loop_done == 0);
 626 }
 627
 628 void
 629 db_error(const char *s)
 630 {
 631         extern int db_macro_level;
 632
 633         db_macro_level = 0;
 634         if (db_recover) {
 635             if (s > (char *)1)
 636                 db_printf(s);
 637             db_flush_lex();
 638             _longjmp(db_recover, (s == (char *)1) ? 2 : 1);
 639         }
 640         else
 641         {
 642             if (s > (char *)1)
 643                 db_printf(s);
 644             panic("db_error");
 645         }
 646 }
 647
 648
 649 /*
 650  * Call random function:
 651  * !expr(arg,arg,arg)
 652  */
 653 void
 654 db_fncall(void)
 655 {
 656         db_expr_t       fn_addr;
 657 #define MAXARGS         11
 658         uint32_t        args[MAXARGS];
 659         db_expr_t argwork;
 660         int             nargs = 0;
 661         uint32_t        retval;
 662         uint32_t        (*func)(uint32_t, ...);
 663         int             t;
 664
 665         if (!db_expression(&fn_addr)) {
 666             db_printf("Bad function \"%s\"\n", db_tok_string);
 667             db_flush_lex();
 668             return;
 669         }
 670         func = (uint32_t (*) (uint32_t, ...)) fn_addr;
 671
 672         t = db_read_token();
 673         if (t == tLPAREN) {
 674             if (db_expression(&argwork)) {
 675                         args[nargs] = (uint32_t)argwork;
 676                         nargs++;
 677                         while ((t = db_read_token()) == tCOMMA) {
 678                                 if (nargs == MAXARGS) {
 679                                         db_printf("Too many arguments\n");
 680                                         db_flush_lex();
 681                                         return;
 682                                 }
 683                                 if (!db_expression(&argwork)) {
 684                                         db_printf("Argument missing\n");
 685                                         db_flush_lex();
 686                                         return;
 687                                 }
 688                                 args[nargs] = (uint32_t)argwork;
 689                                 nargs++;
 690                         }
 691                         db_unread_token(t);
 692             }
 693             if (db_read_token() != tRPAREN) {
 694                         db_printf("?\n");
 695                         db_flush_lex();
 696                         return;
 697             }
 698         }
 699         while (nargs < MAXARGS) {
 700             args[nargs++] = 0;
 701         }
 702
 703         retval = (*func)(args[0], args[1], args[2], args[3], args[4],
 704                          args[5], args[6], args[7], args[8], args[9] );
 705         db_printf(" %#n\n", retval);
 706 }
 707
 708 boolean_t
 709 db_option(
 710         const char      *modif,
 711         int             option)
 712 {
 713         register char *p;
 714
 715         for (p = modif; *p; p++)
 716             if (*p == option)
 717                 return(TRUE);
 718         return(FALSE);
 719 }