1 /* $NetBSD: db_command.c,v 1.89 2006/09/05 21:56:44 uwe Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* 30 * Command dispatcher. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: db_command.c,v 1.89 2006/09/05 21:56:44 uwe Exp $"); 35 36 #include "opt_ddb.h" 37 #include "opt_kgdb.h" 38 #include "opt_inet.h" 39 #include "opt_ddbparam.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/reboot.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/namei.h> 48 #include <sys/pool.h> 49 #include <sys/proc.h> 50 #include <sys/vnode.h> 51 52 #include <machine/db_machdep.h> /* type definitions */ 53 54 #if defined(_KERNEL_OPT) 55 #include "opt_multiprocessor.h" 56 #endif 57 #ifdef MULTIPROCESSOR 58 #include <machine/cpu.h> 59 #endif 60 61 #include <ddb/db_lex.h> 62 #include <ddb/db_output.h> 63 #include <ddb/db_command.h> 64 #include <ddb/db_break.h> 65 #include <ddb/db_watch.h> 66 #include <ddb/db_run.h> 67 #include <ddb/db_variables.h> 68 #include <ddb/db_interface.h> 69 #include <ddb/db_sym.h> 70 #include <ddb/db_extern.h> 71 72 #include <uvm/uvm_extern.h> 73 #include <uvm/uvm_ddb.h> 74 75 #include "arp.h" 76 77 /* 78 * Results of command search. 79 */ 80 #define CMD_UNIQUE 0 81 #define CMD_FOUND 1 82 #define CMD_NONE 2 83 #define CMD_AMBIGUOUS 3 84 #define CMD_HELP 4 85 86 /* 87 * Exported global variables 88 */ 89 boolean_t db_cmd_loop_done; 90 label_t *db_recover; 91 db_addr_t db_dot; 92 db_addr_t db_last_addr; 93 db_addr_t db_prev; 94 db_addr_t db_next; 95 96 /* 97 * if 'ed' style: 'dot' is set at start of last item printed, 98 * and '+' points to next line. 99 * Otherwise: 'dot' points to next item, '..' points to last. 100 */ 101 static boolean_t db_ed_style = TRUE; 102 103 static void db_buf_print_cmd(db_expr_t, int, db_expr_t, const char *); 104 static void db_cmd_list(const struct db_command *); 105 static int db_cmd_search(const char *, const struct db_command *, 106 const struct db_command **); 107 static void db_command(const struct db_command **, 108 const struct db_command *); 109 static void db_event_print_cmd(db_expr_t, int, db_expr_t, const char *); 110 static void db_fncall(db_expr_t, int, db_expr_t, const char *); 111 static void db_malloc_print_cmd(db_expr_t, int, db_expr_t, const char *); 112 static void db_map_print_cmd(db_expr_t, int, db_expr_t, const char *); 113 static void db_namecache_print_cmd(db_expr_t, int, db_expr_t, const char *); 114 static void db_object_print_cmd(db_expr_t, int, db_expr_t, const char *); 115 static void db_page_print_cmd(db_expr_t, int, db_expr_t, const char *); 116 static void db_show_all_pages(db_expr_t, int, db_expr_t, const char *); 117 static void db_pool_print_cmd(db_expr_t, int, db_expr_t, const char *); 118 static void db_reboot_cmd(db_expr_t, int, db_expr_t, const char *); 119 static void db_sifting_cmd(db_expr_t, int, db_expr_t, const char *); 120 static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, const char *); 121 static void db_sync_cmd(db_expr_t, int, db_expr_t, const char *); 122 static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, const char *); 123 static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, const char *); 124 static void db_mount_print_cmd(db_expr_t, int, db_expr_t, const char *); 125 static void db_mbuf_print_cmd(db_expr_t, int, db_expr_t, const char *); 126 127 /* 128 * 'show' commands 129 */ 130 131 static const struct db_command db_show_all_cmds[] = { 132 { "callout", db_show_callout, 0, NULL }, 133 { "pages", db_show_all_pages, 0, NULL }, 134 { "procs", db_show_all_procs, 0, NULL }, 135 { "pools", db_show_all_pools, 0, NULL }, 136 { NULL, NULL, 0, NULL } 137 }; 138 139 static const struct db_command db_show_cmds[] = { 140 { "all", NULL, 0, db_show_all_cmds }, 141 #if defined(INET) && (NARP > 0) 142 { "arptab", db_show_arptab, 0, NULL }, 143 #endif 144 { "breaks", db_listbreak_cmd, 0, NULL }, 145 { "buf", db_buf_print_cmd, 0, NULL }, 146 { "event", db_event_print_cmd, 0, NULL }, 147 { "malloc", db_malloc_print_cmd, 0, NULL }, 148 { "map", db_map_print_cmd, 0, NULL }, 149 { "mount", db_mount_print_cmd, 0, NULL }, 150 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 151 { "ncache", db_namecache_print_cmd, 0, NULL }, 152 { "object", db_object_print_cmd, 0, NULL }, 153 { "page", db_page_print_cmd, 0, NULL }, 154 { "pool", db_pool_print_cmd, 0, NULL }, 155 { "registers", db_show_regs, 0, NULL }, 156 { "sched_qs", db_show_sched_qs, 0, NULL }, 157 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 158 { "vnode", db_vnode_print_cmd, 0, NULL }, 159 { "watches", db_listwatch_cmd, 0, NULL }, 160 { NULL, NULL, 0, NULL } 161 }; 162 163 /* arch/<arch>/<arch>/db_interface.c */ 164 #ifdef DB_MACHINE_COMMANDS 165 extern const struct db_command db_machine_command_table[]; 166 #endif 167 168 static const struct db_command db_command_table[] = { 169 { "b", db_breakpoint_cmd, 0, NULL }, 170 { "break", db_breakpoint_cmd, 0, NULL }, 171 { "bt", db_stack_trace_cmd, 0, NULL }, 172 { "c", db_continue_cmd, 0, NULL }, 173 { "call", db_fncall, CS_OWN, NULL }, 174 { "callout", db_show_callout, 0, NULL }, 175 { "continue", db_continue_cmd, 0, NULL }, 176 { "d", db_delete_cmd, 0, NULL }, 177 { "delete", db_delete_cmd, 0, NULL }, 178 { "dmesg", db_dmesg, 0, NULL }, 179 { "dwatch", db_deletewatch_cmd, 0, NULL }, 180 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 181 { "kill", db_kill_proc, CS_OWN, NULL }, 182 #ifdef KGDB 183 { "kgdb", db_kgdb_cmd, 0, NULL }, 184 #endif 185 #ifdef DB_MACHINE_COMMANDS 186 { "machine", NULL, 0, db_machine_command_table }, 187 #endif 188 { "match", db_trace_until_matching_cmd,0, NULL }, 189 { "next", db_trace_until_matching_cmd,0, NULL }, 190 { "p", db_print_cmd, 0, NULL }, 191 { "print", db_print_cmd, 0, NULL }, 192 { "ps", db_show_all_procs, 0, NULL }, 193 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 194 { "s", db_single_step_cmd, 0, NULL }, 195 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 196 { "set", db_set_cmd, CS_OWN, NULL }, 197 { "show", NULL, 0, db_show_cmds }, 198 { "sifting", db_sifting_cmd, CS_OWN, NULL }, 199 { "step", db_single_step_cmd, 0, NULL }, 200 { "sync", db_sync_cmd, CS_OWN, NULL }, 201 { "trace", db_stack_trace_cmd, 0, NULL }, 202 { "until", db_trace_until_call_cmd,0, NULL }, 203 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 204 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 205 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 206 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 207 { NULL, NULL, 0, NULL } 208 }; 209 210 static const struct db_command *db_last_command = NULL; 211 #if defined(DDB_COMMANDONENTER) 212 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 213 #else /* defined(DDB_COMMANDONENTER) */ 214 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 215 #endif /* defined(DDB_COMMANDONENTER) */ 216 #define DB_LINE_SEP ';' 217 218 /* 219 * Utility routine - discard tokens through end-of-line. 220 */ 221 void 222 db_skip_to_eol(void) 223 { 224 int t; 225 226 do { 227 t = db_read_token(); 228 } while (t != tEOL); 229 } 230 231 void 232 db_error(const char *s) 233 { 234 235 if (s) 236 db_printf("%s", s); 237 db_flush_lex(); 238 longjmp(db_recover); 239 } 240 241 static void 242 db_execute_commandlist(const char *cmdlist) 243 { 244 const char *cmd = cmdlist; 245 const struct db_command *dummy = NULL; 246 247 while (*cmd != '\0') { 248 const char *ep = cmd; 249 250 while (*ep != '\0' && *ep != DB_LINE_SEP) { 251 ep++; 252 } 253 db_set_line(cmd, ep); 254 db_command(&dummy, db_command_table); 255 cmd = ep; 256 if (*cmd == DB_LINE_SEP) { 257 cmd++; 258 } 259 } 260 } 261 262 void 263 db_command_loop(void) 264 { 265 label_t db_jmpbuf; 266 label_t *savejmp; 267 268 /* 269 * Initialize 'prev' and 'next' to dot. 270 */ 271 db_prev = db_dot; 272 db_next = db_dot; 273 274 db_cmd_loop_done = 0; 275 276 savejmp = db_recover; 277 db_recover = &db_jmpbuf; 278 (void) setjmp(&db_jmpbuf); 279 280 db_execute_commandlist(db_cmd_on_enter); 281 282 while (!db_cmd_loop_done) { 283 if (db_print_position() != 0) 284 db_printf("\n"); 285 db_output_line = 0; 286 287 288 #ifdef MULTIPROCESSOR 289 db_printf("db{%ld}> ", (long)cpu_number()); 290 #else 291 db_printf("db> "); 292 #endif 293 (void) db_read_line(); 294 295 db_command(&db_last_command, db_command_table); 296 } 297 298 db_recover = savejmp; 299 } 300 301 /* 302 * Search for command prefix. 303 */ 304 static int 305 db_cmd_search(const char *name, const struct db_command *table, 306 const struct db_command **cmdp) 307 { 308 const struct db_command *cmd; 309 int result = CMD_NONE; 310 311 for (cmd = table; cmd->name != 0; cmd++) { 312 const char *lp; 313 const char *rp; 314 int c; 315 316 lp = name; 317 rp = cmd->name; 318 while ((c = *lp) == *rp) { 319 if (c == 0) { 320 /* complete match */ 321 *cmdp = cmd; 322 return (CMD_UNIQUE); 323 } 324 lp++; 325 rp++; 326 } 327 if (c == 0) { 328 /* end of name, not end of command - 329 partial match */ 330 if (result == CMD_FOUND) { 331 result = CMD_AMBIGUOUS; 332 /* but keep looking for a full match - 333 this lets us match single letters */ 334 } else { 335 *cmdp = cmd; 336 result = CMD_FOUND; 337 } 338 } 339 } 340 if (result == CMD_NONE) { 341 /* check for 'help' */ 342 if (name[0] == 'h' && name[1] == 'e' 343 && name[2] == 'l' && name[3] == 'p') 344 result = CMD_HELP; 345 } 346 return (result); 347 } 348 349 static void 350 db_cmd_list(const struct db_command *table) 351 { 352 int i, j, w, columns, lines, width=0, numcmds; 353 const char *p; 354 355 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 356 w = strlen(table[numcmds].name); 357 if (w > width) 358 width = w; 359 } 360 width = DB_NEXT_TAB(width); 361 362 columns = db_max_width / width; 363 if (columns == 0) 364 columns = 1; 365 lines = (numcmds + columns - 1) / columns; 366 for (i = 0; i < lines; i++) { 367 for (j = 0; j < columns; j++) { 368 p = table[j * lines + i].name; 369 if (p) 370 db_printf("%s", p); 371 if (j * lines + i + lines >= numcmds) { 372 db_putchar('\n'); 373 break; 374 } 375 if (p) { 376 w = strlen(p); 377 while (w < width) { 378 w = DB_NEXT_TAB(w); 379 db_putchar('\t'); 380 } 381 } 382 } 383 } 384 } 385 386 static void 387 db_command(const struct db_command **last_cmdp, 388 const struct db_command *cmd_table) 389 { 390 const struct db_command *cmd; 391 int t; 392 char modif[TOK_STRING_SIZE]; 393 db_expr_t addr, count; 394 boolean_t have_addr = FALSE; 395 int result; 396 static db_expr_t last_count = 0; 397 398 cmd = NULL; /* XXX gcc */ 399 400 t = db_read_token(); 401 if ((t == tEOL) || (t == tCOMMA)) { 402 /* 403 * An empty line repeats last command, at 'next'. 404 * Only a count repeats the last command with the new count. 405 */ 406 cmd = *last_cmdp; 407 addr = (db_expr_t)db_next; 408 if (t == tCOMMA) { 409 if (!db_expression(&count)) { 410 db_printf("Count missing\n"); 411 db_flush_lex(); 412 return; 413 } 414 } else 415 count = last_count; 416 have_addr = FALSE; 417 modif[0] = '\0'; 418 db_skip_to_eol(); 419 } else if (t == tEXCL) { 420 db_fncall(0, 0, 0, NULL); 421 return; 422 } else if (t != tIDENT) { 423 db_printf("?\n"); 424 db_flush_lex(); 425 return; 426 } else { 427 /* 428 * Search for command 429 */ 430 while (cmd_table) { 431 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 432 switch (result) { 433 case CMD_NONE: 434 db_printf("No such command\n"); 435 db_flush_lex(); 436 return; 437 case CMD_AMBIGUOUS: 438 db_printf("Ambiguous\n"); 439 db_flush_lex(); 440 return; 441 case CMD_HELP: 442 db_cmd_list(cmd_table); 443 db_flush_lex(); 444 return; 445 default: 446 break; 447 } 448 if ((cmd_table = cmd->more) != 0) { 449 t = db_read_token(); 450 if (t != tIDENT) { 451 db_cmd_list(cmd_table); 452 db_flush_lex(); 453 return; 454 } 455 } 456 } 457 458 if ((cmd->flag & CS_OWN) == 0) { 459 /* 460 * Standard syntax: 461 * command [/modifier] [addr] [,count] 462 */ 463 t = db_read_token(); 464 if (t == tSLASH) { 465 t = db_read_token(); 466 if (t != tIDENT) { 467 db_printf("Bad modifier\n"); 468 db_flush_lex(); 469 return; 470 } 471 strlcpy(modif, db_tok_string, sizeof(modif)); 472 } else { 473 db_unread_token(t); 474 modif[0] = '\0'; 475 } 476 477 if (db_expression(&addr)) { 478 db_dot = (db_addr_t) addr; 479 db_last_addr = db_dot; 480 have_addr = TRUE; 481 } else { 482 addr = (db_expr_t) db_dot; 483 have_addr = FALSE; 484 } 485 t = db_read_token(); 486 if (t == tCOMMA) { 487 if (!db_expression(&count)) { 488 db_printf("Count missing\n"); 489 db_flush_lex(); 490 return; 491 } 492 } else { 493 db_unread_token(t); 494 count = -1; 495 } 496 if ((cmd->flag & CS_MORE) == 0) { 497 db_skip_to_eol(); 498 } 499 } 500 } 501 *last_cmdp = cmd; 502 last_count = count; 503 if (cmd != 0) { 504 /* 505 * Execute the command. 506 */ 507 (*cmd->fcn)(addr, have_addr, count, modif); 508 509 if (cmd->flag & CS_SET_DOT) { 510 /* 511 * If command changes dot, set dot to 512 * previous address displayed (if 'ed' style). 513 */ 514 if (db_ed_style) 515 db_dot = db_prev; 516 else 517 db_dot = db_next; 518 } else { 519 /* 520 * If command does not change dot, 521 * set 'next' location to be the same. 522 */ 523 db_next = db_dot; 524 } 525 } 526 } 527 528 /*ARGSUSED*/ 529 static void 530 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 531 { 532 boolean_t full = FALSE; 533 534 if (modif[0] == 'f') 535 full = TRUE; 536 537 if (have_addr == FALSE) 538 addr = (db_expr_t)(intptr_t) kernel_map; 539 540 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 541 } 542 543 /*ARGSUSED*/ 544 static void 545 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 546 { 547 548 #ifdef MALLOC_DEBUG 549 if (!have_addr) 550 addr = 0; 551 552 debug_malloc_printit(db_printf, (vaddr_t) addr); 553 #else 554 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 555 #endif /* MALLOC_DEBUG */ 556 } 557 558 /*ARGSUSED*/ 559 static void 560 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 561 { 562 boolean_t full = FALSE; 563 564 if (modif[0] == 'f') 565 full = TRUE; 566 567 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 568 db_printf); 569 } 570 571 /*ARGSUSED*/ 572 static void 573 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 574 { 575 boolean_t full = FALSE; 576 577 if (modif[0] == 'f') 578 full = TRUE; 579 580 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 581 } 582 583 /*ARGSUSED*/ 584 static void 585 db_show_all_pages(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 586 { 587 588 uvm_page_printall(db_printf); 589 } 590 591 /*ARGSUSED*/ 592 static void 593 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 594 { 595 boolean_t full = FALSE; 596 597 if (modif[0] == 'f') 598 full = TRUE; 599 600 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 601 } 602 603 /*ARGSUSED*/ 604 static void 605 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 606 { 607 boolean_t full = FALSE; 608 609 if (modif[0] == 'f') 610 full = TRUE; 611 612 event_print(full, db_printf); 613 } 614 615 /*ARGSUSED*/ 616 static void 617 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 618 { 619 boolean_t full = FALSE; 620 621 if (modif[0] == 'f') 622 full = TRUE; 623 624 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 625 } 626 627 static void 628 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 629 { 630 boolean_t full = FALSE; 631 632 if (modif[0] == 'f') 633 full = TRUE; 634 635 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 636 } 637 638 /*ARGSUSED*/ 639 static void 640 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 641 const char *modif) 642 { 643 644 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf); 645 } 646 647 /*ARGSUSED*/ 648 static void 649 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 650 { 651 652 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 653 } 654 655 /*ARGSUSED*/ 656 static void 657 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 658 const char *modif) 659 { 660 661 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 662 } 663 664 /*ARGSUSED*/ 665 static void 666 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 667 { 668 669 uvmexp_print(db_printf); 670 } 671 672 /* 673 * Call random function: 674 * !expr(arg,arg,arg) 675 */ 676 /*ARGSUSED*/ 677 static void 678 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 679 { 680 db_expr_t fn_addr; 681 #define MAXARGS 11 682 db_expr_t args[MAXARGS]; 683 int nargs = 0; 684 db_expr_t retval; 685 db_expr_t (*func)(db_expr_t, ...); 686 int t; 687 688 if (!db_expression(&fn_addr)) { 689 db_printf("Bad function\n"); 690 db_flush_lex(); 691 return; 692 } 693 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 694 695 t = db_read_token(); 696 if (t == tLPAREN) { 697 if (db_expression(&args[0])) { 698 nargs++; 699 while ((t = db_read_token()) == tCOMMA) { 700 if (nargs == MAXARGS) { 701 db_printf("Too many arguments\n"); 702 db_flush_lex(); 703 return; 704 } 705 if (!db_expression(&args[nargs])) { 706 db_printf("Argument missing\n"); 707 db_flush_lex(); 708 return; 709 } 710 nargs++; 711 } 712 db_unread_token(t); 713 } 714 if (db_read_token() != tRPAREN) { 715 db_printf("?\n"); 716 db_flush_lex(); 717 return; 718 } 719 } 720 db_skip_to_eol(); 721 722 while (nargs < MAXARGS) { 723 args[nargs++] = 0; 724 } 725 726 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 727 args[5], args[6], args[7], args[8], args[9]); 728 db_printf("%s\n", db_num_to_str(retval)); 729 } 730 731 static void 732 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 733 { 734 db_expr_t bootflags; 735 736 /* Flags, default to RB_AUTOBOOT */ 737 if (!db_expression(&bootflags)) 738 bootflags = (db_expr_t)RB_AUTOBOOT; 739 if (db_read_token() != tEOL) { 740 db_error("?\n"); 741 /*NOTREACHED*/ 742 } 743 /* 744 * We are leaving DDB, never to return upward. 745 * Clear db_recover so that we can debug faults in functions 746 * called from cpu_reboot. 747 */ 748 db_recover = 0; 749 cpu_reboot((int)bootflags, NULL); 750 } 751 752 static void 753 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 754 { 755 int mode, t; 756 757 t = db_read_token(); 758 if (t == tSLASH) { 759 t = db_read_token(); 760 if (t != tIDENT) { 761 bad_modifier: 762 db_printf("Bad modifier\n"); 763 db_flush_lex(); 764 return; 765 } 766 if (!strcmp(db_tok_string, "F")) 767 mode = 'F'; 768 else 769 goto bad_modifier; 770 t = db_read_token(); 771 } else 772 mode = 0; 773 774 if (t == tIDENT) 775 db_sifting(db_tok_string, mode); 776 else { 777 db_printf("Bad argument (non-string)\n"); 778 db_flush_lex(); 779 } 780 } 781 782 static void 783 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 784 { 785 register const char *cp = modif; 786 register char c; 787 void (*pr)(const char *, ...); 788 789 pr = db_printf; 790 while ((c = *cp++) != 0) 791 if (c == 'l') 792 pr = printf; 793 794 if (count == -1) 795 count = 65535; 796 797 db_stack_trace_print(addr, have_addr, count, modif, pr); 798 } 799 800 static void 801 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 802 { 803 804 /* 805 * We are leaving DDB, never to return upward. 806 * Clear db_recover so that we can debug faults in functions 807 * called from cpu_reboot. 808 */ 809 db_recover = 0; 810 cpu_reboot(RB_DUMP, NULL); 811 } 812