db_command.c revision 1.95
1 /* $NetBSD: db_command.c,v 1.95 2007/02/22 06:41:00 thorpej 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 (at) 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 1.95 2007/02/22 06:41:00 thorpej 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 #include <sys/lockdebug.h> 52 #include <sys/sleepq.h> 53 54 #include <machine/db_machdep.h> /* type definitions */ 55 56 #if defined(_KERNEL_OPT) 57 #include "opt_multiprocessor.h" 58 #endif 59 #ifdef MULTIPROCESSOR 60 #include <machine/cpu.h> 61 #endif 62 63 #include <ddb/db_lex.h> 64 #include <ddb/db_output.h> 65 #include <ddb/db_command.h> 66 #include <ddb/db_break.h> 67 #include <ddb/db_watch.h> 68 #include <ddb/db_run.h> 69 #include <ddb/db_variables.h> 70 #include <ddb/db_interface.h> 71 #include <ddb/db_sym.h> 72 #include <ddb/db_extern.h> 73 74 #include <uvm/uvm_extern.h> 75 #include <uvm/uvm_ddb.h> 76 77 #include "arp.h" 78 79 /* 80 * Results of command search. 81 */ 82 #define CMD_UNIQUE 0 83 #define CMD_FOUND 1 84 #define CMD_NONE 2 85 #define CMD_AMBIGUOUS 3 86 #define CMD_HELP 4 87 88 /* 89 * Exported global variables 90 */ 91 bool db_cmd_loop_done; 92 label_t *db_recover; 93 db_addr_t db_dot; 94 db_addr_t db_last_addr; 95 db_addr_t db_prev; 96 db_addr_t db_next; 97 98 /* 99 * if 'ed' style: 'dot' is set at start of last item printed, 100 * and '+' points to next line. 101 * Otherwise: 'dot' points to next item, '..' points to last. 102 */ 103 static bool db_ed_style = true; 104 105 static void db_buf_print_cmd(db_expr_t, bool, db_expr_t, const char *); 106 static void db_cmd_list(const struct db_command *); 107 static int db_cmd_search(const char *, const struct db_command *, 108 const struct db_command **); 109 static void db_command(const struct db_command **, 110 const struct db_command *); 111 static void db_event_print_cmd(db_expr_t, bool, db_expr_t, const char *); 112 static void db_fncall(db_expr_t, bool, db_expr_t, const char *); 113 static void db_malloc_print_cmd(db_expr_t, bool, db_expr_t, const char *); 114 static void db_map_print_cmd(db_expr_t, bool, db_expr_t, const char *); 115 static void db_namecache_print_cmd(db_expr_t, bool, db_expr_t, const char *); 116 static void db_object_print_cmd(db_expr_t, bool, db_expr_t, const char *); 117 static void db_page_print_cmd(db_expr_t, bool, db_expr_t, const char *); 118 static void db_show_all_pages(db_expr_t, bool, db_expr_t, const char *); 119 static void db_pool_print_cmd(db_expr_t, bool, db_expr_t, const char *); 120 static void db_reboot_cmd(db_expr_t, bool, db_expr_t, const char *); 121 static void db_sifting_cmd(db_expr_t, bool, db_expr_t, const char *); 122 static void db_stack_trace_cmd(db_expr_t, bool, db_expr_t, const char *); 123 static void db_sync_cmd(db_expr_t, bool, db_expr_t, const char *); 124 static void db_uvmexp_print_cmd(db_expr_t, bool, db_expr_t, const char *); 125 static void db_vnode_print_cmd(db_expr_t, bool, db_expr_t, const char *); 126 static void db_lock_print_cmd(db_expr_t, bool, db_expr_t, const char *); 127 static void db_mount_print_cmd(db_expr_t, bool, db_expr_t, const char *); 128 static void db_mbuf_print_cmd(db_expr_t, bool, db_expr_t, const char *); 129 130 /* 131 * 'show' commands 132 */ 133 134 static const struct db_command db_show_all_cmds[] = { 135 { "callout", db_show_callout, 0, NULL }, 136 { "pages", db_show_all_pages, 0, NULL }, 137 { "procs", db_show_all_procs, 0, NULL }, 138 { "pools", db_show_all_pools, 0, NULL }, 139 { NULL, NULL, 0, NULL } 140 }; 141 142 static const struct db_command db_show_cmds[] = { 143 { "all", NULL, 0, db_show_all_cmds }, 144 #if defined(INET) && (NARP > 0) 145 { "arptab", db_show_arptab, 0, NULL }, 146 #endif 147 { "breaks", db_listbreak_cmd, 0, NULL }, 148 { "buf", db_buf_print_cmd, 0, NULL }, 149 { "event", db_event_print_cmd, 0, NULL }, 150 { "lock", db_lock_print_cmd, 0, NULL }, 151 { "malloc", db_malloc_print_cmd, 0, NULL }, 152 { "map", db_map_print_cmd, 0, NULL }, 153 { "mount", db_mount_print_cmd, 0, NULL }, 154 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 155 { "ncache", db_namecache_print_cmd, 0, NULL }, 156 { "object", db_object_print_cmd, 0, NULL }, 157 { "page", db_page_print_cmd, 0, NULL }, 158 { "pool", db_pool_print_cmd, 0, NULL }, 159 { "registers", db_show_regs, 0, NULL }, 160 { "sched_qs", db_show_sched_qs, 0, NULL }, 161 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 162 { "vnode", db_vnode_print_cmd, 0, NULL }, 163 { "watches", db_listwatch_cmd, 0, NULL }, 164 { NULL, NULL, 0, NULL } 165 }; 166 167 /* arch/<arch>/<arch>/db_interface.c */ 168 #ifdef DB_MACHINE_COMMANDS 169 extern const struct db_command db_machine_command_table[]; 170 #endif 171 172 static const struct db_command db_command_table[] = { 173 { "b", db_breakpoint_cmd, 0, NULL }, 174 { "break", db_breakpoint_cmd, 0, NULL }, 175 { "bt", db_stack_trace_cmd, 0, NULL }, 176 { "c", db_continue_cmd, 0, NULL }, 177 { "call", db_fncall, CS_OWN, NULL }, 178 { "callout", db_show_callout, 0, NULL }, 179 { "continue", db_continue_cmd, 0, NULL }, 180 { "d", db_delete_cmd, 0, NULL }, 181 { "delete", db_delete_cmd, 0, NULL }, 182 { "dmesg", db_dmesg, 0, NULL }, 183 { "dwatch", db_deletewatch_cmd, 0, NULL }, 184 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 185 { "kill", db_kill_proc, CS_OWN, NULL }, 186 #ifdef KGDB 187 { "kgdb", db_kgdb_cmd, 0, NULL }, 188 #endif 189 #ifdef DB_MACHINE_COMMANDS 190 { "machine", NULL, 0, db_machine_command_table }, 191 #endif 192 { "match", db_trace_until_matching_cmd,0, NULL }, 193 { "next", db_trace_until_matching_cmd,0, NULL }, 194 { "p", db_print_cmd, 0, NULL }, 195 { "print", db_print_cmd, 0, NULL }, 196 { "ps", db_show_all_procs, 0, NULL }, 197 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 198 { "s", db_single_step_cmd, 0, NULL }, 199 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 200 { "set", db_set_cmd, CS_OWN, NULL }, 201 { "show", NULL, 0, db_show_cmds }, 202 { "sifting", db_sifting_cmd, CS_OWN, NULL }, 203 { "step", db_single_step_cmd, 0, NULL }, 204 { "sync", db_sync_cmd, CS_OWN, NULL }, 205 { "trace", db_stack_trace_cmd, 0, NULL }, 206 { "until", db_trace_until_call_cmd,0, NULL }, 207 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 208 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 209 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 210 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 211 { NULL, NULL, 0, NULL } 212 }; 213 214 static const struct db_command *db_last_command = NULL; 215 #if defined(DDB_COMMANDONENTER) 216 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 217 #else /* defined(DDB_COMMANDONENTER) */ 218 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 219 #endif /* defined(DDB_COMMANDONENTER) */ 220 #define DB_LINE_SEP ';' 221 222 /* 223 * Utility routine - discard tokens through end-of-line. 224 */ 225 void 226 db_skip_to_eol(void) 227 { 228 int t; 229 230 do { 231 t = db_read_token(); 232 } while (t != tEOL); 233 } 234 235 void 236 db_error(const char *s) 237 { 238 239 if (s) 240 db_printf("%s", s); 241 db_flush_lex(); 242 longjmp(db_recover); 243 } 244 245 static void 246 db_execute_commandlist(const char *cmdlist) 247 { 248 const char *cmd = cmdlist; 249 const struct db_command *dummy = NULL; 250 251 while (*cmd != '\0') { 252 const char *ep = cmd; 253 254 while (*ep != '\0' && *ep != DB_LINE_SEP) { 255 ep++; 256 } 257 db_set_line(cmd, ep); 258 db_command(&dummy, db_command_table); 259 cmd = ep; 260 if (*cmd == DB_LINE_SEP) { 261 cmd++; 262 } 263 } 264 } 265 266 void 267 db_command_loop(void) 268 { 269 label_t db_jmpbuf; 270 label_t *savejmp; 271 272 /* 273 * Initialize 'prev' and 'next' to dot. 274 */ 275 db_prev = db_dot; 276 db_next = db_dot; 277 278 db_cmd_loop_done = 0; 279 280 savejmp = db_recover; 281 db_recover = &db_jmpbuf; 282 (void) setjmp(&db_jmpbuf); 283 284 db_execute_commandlist(db_cmd_on_enter); 285 286 while (!db_cmd_loop_done) { 287 if (db_print_position() != 0) 288 db_printf("\n"); 289 db_output_line = 0; 290 291 292 #ifdef MULTIPROCESSOR 293 db_printf("db{%ld}> ", (long)cpu_number()); 294 #else 295 db_printf("db> "); 296 #endif 297 (void) db_read_line(); 298 299 db_command(&db_last_command, db_command_table); 300 } 301 302 db_recover = savejmp; 303 } 304 305 /* 306 * Search for command prefix. 307 */ 308 static int 309 db_cmd_search(const char *name, const struct db_command *table, 310 const struct db_command **cmdp) 311 { 312 const struct db_command *cmd; 313 int result = CMD_NONE; 314 315 for (cmd = table; cmd->name != 0; cmd++) { 316 const char *lp; 317 const char *rp; 318 int c; 319 320 lp = name; 321 rp = cmd->name; 322 while ((c = *lp) == *rp) { 323 if (c == 0) { 324 /* complete match */ 325 *cmdp = cmd; 326 return (CMD_UNIQUE); 327 } 328 lp++; 329 rp++; 330 } 331 if (c == 0) { 332 /* end of name, not end of command - 333 partial match */ 334 if (result == CMD_FOUND) { 335 result = CMD_AMBIGUOUS; 336 /* but keep looking for a full match - 337 this lets us match single letters */ 338 } else { 339 *cmdp = cmd; 340 result = CMD_FOUND; 341 } 342 } 343 } 344 if (result == CMD_NONE) { 345 /* check for 'help' */ 346 if (name[0] == 'h' && name[1] == 'e' 347 && name[2] == 'l' && name[3] == 'p') 348 result = CMD_HELP; 349 } 350 return (result); 351 } 352 353 static void 354 db_cmd_list(const struct db_command *table) 355 { 356 int i, j, w, columns, lines, width=0, numcmds; 357 const char *p; 358 359 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 360 w = strlen(table[numcmds].name); 361 if (w > width) 362 width = w; 363 } 364 width = DB_NEXT_TAB(width); 365 366 columns = db_max_width / width; 367 if (columns == 0) 368 columns = 1; 369 lines = (numcmds + columns - 1) / columns; 370 for (i = 0; i < lines; i++) { 371 for (j = 0; j < columns; j++) { 372 p = table[j * lines + i].name; 373 if (p) 374 db_printf("%s", p); 375 if (j * lines + i + lines >= numcmds) { 376 db_putchar('\n'); 377 break; 378 } 379 if (p) { 380 w = strlen(p); 381 while (w < width) { 382 w = DB_NEXT_TAB(w); 383 db_putchar('\t'); 384 } 385 } 386 } 387 } 388 } 389 390 static void 391 db_command(const struct db_command **last_cmdp, 392 const struct db_command *cmd_table) 393 { 394 const struct db_command *cmd; 395 int t; 396 char modif[TOK_STRING_SIZE]; 397 db_expr_t addr, count; 398 bool have_addr = false; 399 int result; 400 static db_expr_t last_count = 0; 401 402 cmd = NULL; /* XXX gcc */ 403 404 t = db_read_token(); 405 if ((t == tEOL) || (t == tCOMMA)) { 406 /* 407 * An empty line repeats last command, at 'next'. 408 * Only a count repeats the last command with the new count. 409 */ 410 cmd = *last_cmdp; 411 addr = (db_expr_t)db_next; 412 if (t == tCOMMA) { 413 if (!db_expression(&count)) { 414 db_printf("Count missing\n"); 415 db_flush_lex(); 416 return; 417 } 418 } else 419 count = last_count; 420 have_addr = false; 421 modif[0] = '\0'; 422 db_skip_to_eol(); 423 } else if (t == tEXCL) { 424 db_fncall(0, 0, 0, NULL); 425 return; 426 } else if (t != tIDENT) { 427 db_printf("?\n"); 428 db_flush_lex(); 429 return; 430 } else { 431 /* 432 * Search for command 433 */ 434 while (cmd_table) { 435 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 436 switch (result) { 437 case CMD_NONE: 438 db_printf("No such command\n"); 439 db_flush_lex(); 440 return; 441 case CMD_AMBIGUOUS: 442 db_printf("Ambiguous\n"); 443 db_flush_lex(); 444 return; 445 case CMD_HELP: 446 db_cmd_list(cmd_table); 447 db_flush_lex(); 448 return; 449 default: 450 break; 451 } 452 if ((cmd_table = cmd->more) != 0) { 453 t = db_read_token(); 454 if (t != tIDENT) { 455 db_cmd_list(cmd_table); 456 db_flush_lex(); 457 return; 458 } 459 } 460 } 461 462 if ((cmd->flag & CS_OWN) == 0) { 463 /* 464 * Standard syntax: 465 * command [/modifier] [addr] [,count] 466 */ 467 t = db_read_token(); 468 if (t == tSLASH) { 469 t = db_read_token(); 470 if (t != tIDENT) { 471 db_printf("Bad modifier\n"); 472 db_flush_lex(); 473 return; 474 } 475 strlcpy(modif, db_tok_string, sizeof(modif)); 476 } else { 477 db_unread_token(t); 478 modif[0] = '\0'; 479 } 480 481 if (db_expression(&addr)) { 482 db_dot = (db_addr_t) addr; 483 db_last_addr = db_dot; 484 have_addr = true; 485 } else { 486 addr = (db_expr_t) db_dot; 487 have_addr = false; 488 } 489 t = db_read_token(); 490 if (t == tCOMMA) { 491 if (!db_expression(&count)) { 492 db_printf("Count missing\n"); 493 db_flush_lex(); 494 return; 495 } 496 } else { 497 db_unread_token(t); 498 count = -1; 499 } 500 if ((cmd->flag & CS_MORE) == 0) { 501 db_skip_to_eol(); 502 } 503 } 504 } 505 *last_cmdp = cmd; 506 last_count = count; 507 if (cmd != 0) { 508 /* 509 * Execute the command. 510 */ 511 (*cmd->fcn)(addr, have_addr, count, modif); 512 513 if (cmd->flag & CS_SET_DOT) { 514 /* 515 * If command changes dot, set dot to 516 * previous address displayed (if 'ed' style). 517 */ 518 if (db_ed_style) 519 db_dot = db_prev; 520 else 521 db_dot = db_next; 522 } else { 523 /* 524 * If command does not change dot, 525 * set 'next' location to be the same. 526 */ 527 db_next = db_dot; 528 } 529 } 530 } 531 532 /*ARGSUSED*/ 533 static void 534 db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 535 const char *modif) 536 { 537 bool full = false; 538 539 if (modif[0] == 'f') 540 full = true; 541 542 if (have_addr == false) 543 addr = (db_expr_t)(intptr_t) kernel_map; 544 545 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 546 } 547 548 /*ARGSUSED*/ 549 static void 550 db_malloc_print_cmd(db_expr_t addr, bool have_addr, 551 db_expr_t count, const char *modif) 552 { 553 554 #ifdef MALLOC_DEBUG 555 if (!have_addr) 556 addr = 0; 557 558 debug_malloc_printit(db_printf, (vaddr_t) addr); 559 #else 560 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 561 #endif /* MALLOC_DEBUG */ 562 } 563 564 /*ARGSUSED*/ 565 static void 566 db_object_print_cmd(db_expr_t addr, bool have_addr, 567 db_expr_t count, const char *modif) 568 { 569 bool full = false; 570 571 if (modif[0] == 'f') 572 full = true; 573 574 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 575 db_printf); 576 } 577 578 /*ARGSUSED*/ 579 static void 580 db_page_print_cmd(db_expr_t addr, bool have_addr, 581 db_expr_t count, const char *modif) 582 { 583 bool full = false; 584 585 if (modif[0] == 'f') 586 full = true; 587 588 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 589 } 590 591 /*ARGSUSED*/ 592 static void 593 db_show_all_pages(db_expr_t addr, bool have_addr, 594 db_expr_t count, const char *modif) 595 { 596 597 uvm_page_printall(db_printf); 598 } 599 600 /*ARGSUSED*/ 601 static void 602 db_buf_print_cmd(db_expr_t addr, bool have_addr, 603 db_expr_t count, const char *modif) 604 { 605 bool full = false; 606 607 if (modif[0] == 'f') 608 full = true; 609 610 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 611 } 612 613 /*ARGSUSED*/ 614 static void 615 db_event_print_cmd(db_expr_t addr, bool have_addr, 616 db_expr_t count, const char *modif) 617 { 618 bool full = false; 619 620 if (modif[0] == 'f') 621 full = true; 622 623 event_print(full, db_printf); 624 } 625 626 /*ARGSUSED*/ 627 static void 628 db_vnode_print_cmd(db_expr_t addr, bool have_addr, 629 db_expr_t count, const char *modif) 630 { 631 bool full = false; 632 633 if (modif[0] == 'f') 634 full = true; 635 636 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 637 } 638 639 static void 640 db_mount_print_cmd(db_expr_t addr, bool have_addr, 641 db_expr_t count, const char *modif) 642 { 643 bool full = false; 644 645 if (modif[0] == 'f') 646 full = true; 647 648 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 649 } 650 651 /*ARGSUSED*/ 652 static void 653 db_mbuf_print_cmd(db_expr_t addr, bool have_addr, 654 db_expr_t count, const char *modif) 655 { 656 657 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf); 658 } 659 660 /*ARGSUSED*/ 661 static void 662 db_pool_print_cmd(db_expr_t addr, bool have_addr, 663 db_expr_t count, const char *modif) 664 { 665 666 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 667 } 668 669 /*ARGSUSED*/ 670 static void 671 db_namecache_print_cmd(db_expr_t addr, bool have_addr, 672 db_expr_t count, const char *modif) 673 { 674 675 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 676 } 677 678 /*ARGSUSED*/ 679 static void 680 db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, 681 db_expr_t count, const char *modif) 682 { 683 684 uvmexp_print(db_printf); 685 } 686 687 /*ARGSUSED*/ 688 static void 689 db_lock_print_cmd(db_expr_t addr, bool have_addr, 690 db_expr_t count, const char *modif) 691 { 692 693 lockdebug_lock_print((void *)addr, db_printf); 694 } 695 696 /* 697 * Call random function: 698 * !expr(arg,arg,arg) 699 */ 700 /*ARGSUSED*/ 701 static void 702 db_fncall(db_expr_t addr, bool have_addr, 703 db_expr_t count, const char *modif) 704 { 705 db_expr_t fn_addr; 706 #define MAXARGS 11 707 db_expr_t args[MAXARGS]; 708 int nargs = 0; 709 db_expr_t retval; 710 db_expr_t (*func)(db_expr_t, ...); 711 int t; 712 713 if (!db_expression(&fn_addr)) { 714 db_printf("Bad function\n"); 715 db_flush_lex(); 716 return; 717 } 718 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 719 720 t = db_read_token(); 721 if (t == tLPAREN) { 722 if (db_expression(&args[0])) { 723 nargs++; 724 while ((t = db_read_token()) == tCOMMA) { 725 if (nargs == MAXARGS) { 726 db_printf("Too many arguments\n"); 727 db_flush_lex(); 728 return; 729 } 730 if (!db_expression(&args[nargs])) { 731 db_printf("Argument missing\n"); 732 db_flush_lex(); 733 return; 734 } 735 nargs++; 736 } 737 db_unread_token(t); 738 } 739 if (db_read_token() != tRPAREN) { 740 db_printf("?\n"); 741 db_flush_lex(); 742 return; 743 } 744 } 745 db_skip_to_eol(); 746 747 while (nargs < MAXARGS) { 748 args[nargs++] = 0; 749 } 750 751 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 752 args[5], args[6], args[7], args[8], args[9]); 753 db_printf("%s\n", db_num_to_str(retval)); 754 } 755 756 static void 757 db_reboot_cmd(db_expr_t addr, bool have_addr, 758 db_expr_t count, const char *modif) 759 { 760 db_expr_t bootflags; 761 762 /* Flags, default to RB_AUTOBOOT */ 763 if (!db_expression(&bootflags)) 764 bootflags = (db_expr_t)RB_AUTOBOOT; 765 if (db_read_token() != tEOL) { 766 db_error("?\n"); 767 /*NOTREACHED*/ 768 } 769 /* 770 * We are leaving DDB, never to return upward. 771 * Clear db_recover so that we can debug faults in functions 772 * called from cpu_reboot. 773 */ 774 db_recover = 0; 775 cpu_reboot((int)bootflags, NULL); 776 } 777 778 static void 779 db_sifting_cmd(db_expr_t addr, bool have_addr, 780 db_expr_t count, const char *modif) 781 { 782 int mode, t; 783 784 t = db_read_token(); 785 if (t == tSLASH) { 786 t = db_read_token(); 787 if (t != tIDENT) { 788 bad_modifier: 789 db_printf("Bad modifier\n"); 790 db_flush_lex(); 791 return; 792 } 793 if (!strcmp(db_tok_string, "F")) 794 mode = 'F'; 795 else 796 goto bad_modifier; 797 t = db_read_token(); 798 } else 799 mode = 0; 800 801 if (t == tIDENT) 802 db_sifting(db_tok_string, mode); 803 else { 804 db_printf("Bad argument (non-string)\n"); 805 db_flush_lex(); 806 } 807 } 808 809 static void 810 db_stack_trace_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) 811 { 812 register const char *cp = modif; 813 register char c; 814 void (*pr)(const char *, ...); 815 816 pr = db_printf; 817 while ((c = *cp++) != 0) 818 if (c == 'l') 819 pr = printf; 820 821 if (count == -1) 822 count = 65535; 823 824 db_stack_trace_print(addr, have_addr, count, modif, pr); 825 } 826 827 static void 828 db_sync_cmd(db_expr_t addr, bool have_addr, 829 db_expr_t count, const char *modif) 830 { 831 832 /* 833 * We are leaving DDB, never to return upward. 834 * Clear db_recover so that we can debug faults in functions 835 * called from cpu_reboot. 836 */ 837 db_recover = 0; 838 cpu_reboot(RB_DUMP, NULL); 839 } 840
Indexes created Mon Sep 22 21:09:42 GMT 2025