db_command.c revision 1.84.4.2
1 /* $NetBSD: db_command.c,v 1.84.4.2 2006/05/11 23:28:04 elad 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 1.84.4.2 2006/05/11 23:28:04 elad 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(s) 233 const char *s; 234 { 235 236 if (s) 237 db_printf("%s", s); 238 db_flush_lex(); 239 longjmp(db_recover); 240 } 241 242 static void 243 db_execute_commandlist(const char *cmdlist) 244 { 245 const char *cmd = cmdlist; 246 const struct db_command *dummy = NULL; 247 248 while (*cmd != '\0') { 249 const char *ep = cmd; 250 251 while (*ep != '\0' && *ep != DB_LINE_SEP) { 252 ep++; 253 } 254 db_set_line(cmd, ep); 255 db_command(&dummy, db_command_table); 256 cmd = ep; 257 if (*cmd == DB_LINE_SEP) { 258 cmd++; 259 } 260 } 261 } 262 263 void 264 db_command_loop(void) 265 { 266 label_t db_jmpbuf; 267 label_t *savejmp; 268 269 /* 270 * Initialize 'prev' and 'next' to dot. 271 */ 272 db_prev = db_dot; 273 db_next = db_dot; 274 275 db_cmd_loop_done = 0; 276 277 savejmp = db_recover; 278 db_recover = &db_jmpbuf; 279 (void) setjmp(&db_jmpbuf); 280 281 db_execute_commandlist(db_cmd_on_enter); 282 283 while (!db_cmd_loop_done) { 284 if (db_print_position() != 0) 285 db_printf("\n"); 286 db_output_line = 0; 287 288 289 #ifdef MULTIPROCESSOR 290 db_printf("db{%ld}> ", (long)cpu_number()); 291 #else 292 db_printf("db> "); 293 #endif 294 (void) db_read_line(); 295 296 db_command(&db_last_command, db_command_table); 297 } 298 299 db_recover = savejmp; 300 } 301 302 /* 303 * Search for command prefix. 304 */ 305 static int 306 db_cmd_search(const char *name, const struct db_command *table, 307 const struct db_command **cmdp) 308 { 309 const struct db_command *cmd; 310 int result = CMD_NONE; 311 312 for (cmd = table; cmd->name != 0; cmd++) { 313 const char *lp; 314 const char *rp; 315 int c; 316 317 lp = name; 318 rp = cmd->name; 319 while ((c = *lp) == *rp) { 320 if (c == 0) { 321 /* complete match */ 322 *cmdp = cmd; 323 return (CMD_UNIQUE); 324 } 325 lp++; 326 rp++; 327 } 328 if (c == 0) { 329 /* end of name, not end of command - 330 partial match */ 331 if (result == CMD_FOUND) { 332 result = CMD_AMBIGUOUS; 333 /* but keep looking for a full match - 334 this lets us match single letters */ 335 } else { 336 *cmdp = cmd; 337 result = CMD_FOUND; 338 } 339 } 340 } 341 if (result == CMD_NONE) { 342 /* check for 'help' */ 343 if (name[0] == 'h' && name[1] == 'e' 344 && name[2] == 'l' && name[3] == 'p') 345 result = CMD_HELP; 346 } 347 return (result); 348 } 349 350 static void 351 db_cmd_list(const struct db_command *table) 352 { 353 int i, j, w, columns, lines, width=0, numcmds; 354 const char *p; 355 356 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 357 w = strlen(table[numcmds].name); 358 if (w > width) 359 width = w; 360 } 361 width = DB_NEXT_TAB(width); 362 363 columns = db_max_width / width; 364 if (columns == 0) 365 columns = 1; 366 lines = (numcmds + columns - 1) / columns; 367 for (i = 0; i < lines; i++) { 368 for (j = 0; j < columns; j++) { 369 p = table[j * lines + i].name; 370 if (p) 371 db_printf("%s", p); 372 if (j * lines + i + lines >= numcmds) { 373 db_putchar('\n'); 374 break; 375 } 376 if (p) { 377 w = strlen(p); 378 while (w < width) { 379 w = DB_NEXT_TAB(w); 380 db_putchar('\t'); 381 } 382 } 383 } 384 } 385 } 386 387 static void 388 db_command(const struct db_command **last_cmdp, 389 const struct db_command *cmd_table) 390 { 391 const struct db_command *cmd; 392 int t; 393 char modif[TOK_STRING_SIZE]; 394 db_expr_t addr, count; 395 boolean_t have_addr = FALSE; 396 int result; 397 398 cmd = NULL; /* XXX gcc */ 399 400 static db_expr_t last_count = 0; 401 402 t = db_read_token(); 403 if ((t == tEOL) || (t == tCOMMA)) { 404 /* 405 * An empty line repeats last command, at 'next'. 406 * Only a count repeats the last command with the new count. 407 */ 408 cmd = *last_cmdp; 409 addr = (db_expr_t)db_next; 410 if (t == tCOMMA) { 411 if (!db_expression(&count)) { 412 db_printf("Count missing\n"); 413 db_flush_lex(); 414 return; 415 } 416 } else 417 count = last_count; 418 have_addr = FALSE; 419 modif[0] = '\0'; 420 db_skip_to_eol(); 421 } else if (t == tEXCL) { 422 db_fncall(0, 0, 0, NULL); 423 return; 424 } else if (t != tIDENT) { 425 db_printf("?\n"); 426 db_flush_lex(); 427 return; 428 } else { 429 /* 430 * Search for command 431 */ 432 while (cmd_table) { 433 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 434 switch (result) { 435 case CMD_NONE: 436 db_printf("No such command\n"); 437 db_flush_lex(); 438 return; 439 case CMD_AMBIGUOUS: 440 db_printf("Ambiguous\n"); 441 db_flush_lex(); 442 return; 443 case CMD_HELP: 444 db_cmd_list(cmd_table); 445 db_flush_lex(); 446 return; 447 default: 448 break; 449 } 450 if ((cmd_table = cmd->more) != 0) { 451 t = db_read_token(); 452 if (t != tIDENT) { 453 db_cmd_list(cmd_table); 454 db_flush_lex(); 455 return; 456 } 457 } 458 } 459 460 if ((cmd->flag & CS_OWN) == 0) { 461 /* 462 * Standard syntax: 463 * command [/modifier] [addr] [,count] 464 */ 465 t = db_read_token(); 466 if (t == tSLASH) { 467 t = db_read_token(); 468 if (t != tIDENT) { 469 db_printf("Bad modifier\n"); 470 db_flush_lex(); 471 return; 472 } 473 strlcpy(modif, db_tok_string, sizeof(modif)); 474 } else { 475 db_unread_token(t); 476 modif[0] = '\0'; 477 } 478 479 if (db_expression(&addr)) { 480 db_dot = (db_addr_t) addr; 481 db_last_addr = db_dot; 482 have_addr = TRUE; 483 } else { 484 addr = (db_expr_t) db_dot; 485 have_addr = FALSE; 486 } 487 t = db_read_token(); 488 if (t == tCOMMA) { 489 if (!db_expression(&count)) { 490 db_printf("Count missing\n"); 491 db_flush_lex(); 492 return; 493 } 494 } else { 495 db_unread_token(t); 496 count = -1; 497 } 498 if ((cmd->flag & CS_MORE) == 0) { 499 db_skip_to_eol(); 500 } 501 } 502 } 503 *last_cmdp = cmd; 504 last_count = count; 505 if (cmd != 0) { 506 /* 507 * Execute the command. 508 */ 509 (*cmd->fcn)(addr, have_addr, count, modif); 510 511 if (cmd->flag & CS_SET_DOT) { 512 /* 513 * If command changes dot, set dot to 514 * previous address displayed (if 'ed' style). 515 */ 516 if (db_ed_style) 517 db_dot = db_prev; 518 else 519 db_dot = db_next; 520 } else { 521 /* 522 * If command does not change dot, 523 * set 'next' location to be the same. 524 */ 525 db_next = db_dot; 526 } 527 } 528 } 529 530 /*ARGSUSED*/ 531 static void 532 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 533 { 534 boolean_t full = FALSE; 535 536 if (modif[0] == 'f') 537 full = TRUE; 538 539 if (have_addr == FALSE) 540 addr = (db_expr_t)(intptr_t) kernel_map; 541 542 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 543 } 544 545 /*ARGSUSED*/ 546 static void 547 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 548 { 549 550 #ifdef MALLOC_DEBUG 551 if (!have_addr) 552 addr = 0; 553 554 debug_malloc_printit(db_printf, (vaddr_t) addr); 555 #else 556 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 557 #endif /* MALLOC_DEBUG */ 558 } 559 560 /*ARGSUSED*/ 561 static void 562 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 563 { 564 boolean_t full = FALSE; 565 566 if (modif[0] == 'f') 567 full = TRUE; 568 569 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 570 db_printf); 571 } 572 573 /*ARGSUSED*/ 574 static void 575 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 576 { 577 boolean_t full = FALSE; 578 579 if (modif[0] == 'f') 580 full = TRUE; 581 582 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 583 } 584 585 /*ARGSUSED*/ 586 static void 587 db_show_all_pages(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 588 { 589 590 uvm_page_printall(db_printf); 591 } 592 593 /*ARGSUSED*/ 594 static void 595 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 596 { 597 boolean_t full = FALSE; 598 599 if (modif[0] == 'f') 600 full = TRUE; 601 602 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 603 } 604 605 /*ARGSUSED*/ 606 static void 607 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 608 { 609 boolean_t full = FALSE; 610 611 if (modif[0] == 'f') 612 full = TRUE; 613 614 event_print(full, db_printf); 615 } 616 617 /*ARGSUSED*/ 618 static void 619 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 620 { 621 boolean_t full = FALSE; 622 623 if (modif[0] == 'f') 624 full = TRUE; 625 626 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 627 } 628 629 static void 630 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 631 { 632 boolean_t full = FALSE; 633 634 if (modif[0] == 'f') 635 full = TRUE; 636 637 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 638 } 639 640 /*ARGSUSED*/ 641 static void 642 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 643 const char *modif) 644 { 645 646 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf); 647 } 648 649 /*ARGSUSED*/ 650 static void 651 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 652 { 653 654 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 655 } 656 657 /*ARGSUSED*/ 658 static void 659 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 660 const char *modif) 661 { 662 663 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 664 } 665 666 /*ARGSUSED*/ 667 static void 668 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 669 { 670 671 uvmexp_print(db_printf); 672 } 673 674 /* 675 * Call random function: 676 * !expr(arg,arg,arg) 677 */ 678 /*ARGSUSED*/ 679 static void 680 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 681 { 682 db_expr_t fn_addr; 683 #define MAXARGS 11 684 db_expr_t args[MAXARGS]; 685 int nargs = 0; 686 db_expr_t retval; 687 db_expr_t (*func)(db_expr_t, ...); 688 int t; 689 690 if (!db_expression(&fn_addr)) { 691 db_printf("Bad function\n"); 692 db_flush_lex(); 693 return; 694 } 695 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 696 697 t = db_read_token(); 698 if (t == tLPAREN) { 699 if (db_expression(&args[0])) { 700 nargs++; 701 while ((t = db_read_token()) == tCOMMA) { 702 if (nargs == MAXARGS) { 703 db_printf("Too many arguments\n"); 704 db_flush_lex(); 705 return; 706 } 707 if (!db_expression(&args[nargs])) { 708 db_printf("Argument missing\n"); 709 db_flush_lex(); 710 return; 711 } 712 nargs++; 713 } 714 db_unread_token(t); 715 } 716 if (db_read_token() != tRPAREN) { 717 db_printf("?\n"); 718 db_flush_lex(); 719 return; 720 } 721 } 722 db_skip_to_eol(); 723 724 while (nargs < MAXARGS) { 725 args[nargs++] = 0; 726 } 727 728 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 729 args[5], args[6], args[7], args[8], args[9]); 730 db_printf("%s\n", db_num_to_str(retval)); 731 } 732 733 static void 734 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 735 { 736 db_expr_t bootflags; 737 738 /* Flags, default to RB_AUTOBOOT */ 739 if (!db_expression(&bootflags)) 740 bootflags = (db_expr_t)RB_AUTOBOOT; 741 if (db_read_token() != tEOL) { 742 db_error("?\n"); 743 /*NOTREACHED*/ 744 } 745 /* 746 * We are leaving DDB, never to return upward. 747 * Clear db_recover so that we can debug faults in functions 748 * called from cpu_reboot. 749 */ 750 db_recover = 0; 751 cpu_reboot((int)bootflags, NULL); 752 } 753 754 static void 755 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 756 { 757 int mode, t; 758 759 t = db_read_token(); 760 if (t == tSLASH) { 761 t = db_read_token(); 762 if (t != tIDENT) { 763 bad_modifier: 764 db_printf("Bad modifier\n"); 765 db_flush_lex(); 766 return; 767 } 768 if (!strcmp(db_tok_string, "F")) 769 mode = 'F'; 770 else 771 goto bad_modifier; 772 t = db_read_token(); 773 } else 774 mode = 0; 775 776 if (t == tIDENT) 777 db_sifting(db_tok_string, mode); 778 else { 779 db_printf("Bad argument (non-string)\n"); 780 db_flush_lex(); 781 } 782 } 783 784 static void 785 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 786 { 787 register const char *cp = modif; 788 register char c; 789 void (*pr)(const char *, ...); 790 791 pr = db_printf; 792 while ((c = *cp++) != 0) 793 if (c == 'l') 794 pr = printf; 795 796 if (count == -1) 797 count = 65535; 798 799 db_stack_trace_print(addr, have_addr, count, modif, pr); 800 } 801 802 static void 803 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 804 { 805 806 /* 807 * We are leaving DDB, never to return upward. 808 * Clear db_recover so that we can debug faults in functions 809 * called from cpu_reboot. 810 */ 811 db_recover = 0; 812 cpu_reboot(RB_DUMP, NULL); 813 } 814
Indexes created Tue Sep 30 11:09:46 GMT 2025