db_command.c revision 1.87
1 /* $NetBSD: db_command.c,v 1.87 2006/05/14 14:00:17 he 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 1.87 2006/05/14 14:00:17 he 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 static db_expr_t last_count = 0; 398 399 cmd = NULL; /* XXX gcc */ 400 401 t = db_read_token(); 402 if ((t == tEOL) || (t == tCOMMA)) { 403 /* 404 * An empty line repeats last command, at 'next'. 405 * Only a count repeats the last command with the new count. 406 */ 407 cmd = *last_cmdp; 408 addr = (db_expr_t)db_next; 409 if (t == tCOMMA) { 410 if (!db_expression(&count)) { 411 db_printf("Count missing\n"); 412 db_flush_lex(); 413 return; 414 } 415 } else 416 count = last_count; 417 have_addr = FALSE; 418 modif[0] = '\0'; 419 db_skip_to_eol(); 420 } else if (t == tEXCL) { 421 db_fncall(0, 0, 0, NULL); 422 return; 423 } else if (t != tIDENT) { 424 db_printf("?\n"); 425 db_flush_lex(); 426 return; 427 } else { 428 /* 429 * Search for command 430 */ 431 while (cmd_table) { 432 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 433 switch (result) { 434 case CMD_NONE: 435 db_printf("No such command\n"); 436 db_flush_lex(); 437 return; 438 case CMD_AMBIGUOUS: 439 db_printf("Ambiguous\n"); 440 db_flush_lex(); 441 return; 442 case CMD_HELP: 443 db_cmd_list(cmd_table); 444 db_flush_lex(); 445 return; 446 default: 447 break; 448 } 449 if ((cmd_table = cmd->more) != 0) { 450 t = db_read_token(); 451 if (t != tIDENT) { 452 db_cmd_list(cmd_table); 453 db_flush_lex(); 454 return; 455 } 456 } 457 } 458 459 if ((cmd->flag & CS_OWN) == 0) { 460 /* 461 * Standard syntax: 462 * command [/modifier] [addr] [,count] 463 */ 464 t = db_read_token(); 465 if (t == tSLASH) { 466 t = db_read_token(); 467 if (t != tIDENT) { 468 db_printf("Bad modifier\n"); 469 db_flush_lex(); 470 return; 471 } 472 strlcpy(modif, db_tok_string, sizeof(modif)); 473 } else { 474 db_unread_token(t); 475 modif[0] = '\0'; 476 } 477 478 if (db_expression(&addr)) { 479 db_dot = (db_addr_t) addr; 480 db_last_addr = db_dot; 481 have_addr = TRUE; 482 } else { 483 addr = (db_expr_t) db_dot; 484 have_addr = FALSE; 485 } 486 t = db_read_token(); 487 if (t == tCOMMA) { 488 if (!db_expression(&count)) { 489 db_printf("Count missing\n"); 490 db_flush_lex(); 491 return; 492 } 493 } else { 494 db_unread_token(t); 495 count = -1; 496 } 497 if ((cmd->flag & CS_MORE) == 0) { 498 db_skip_to_eol(); 499 } 500 } 501 } 502 *last_cmdp = cmd; 503 last_count = count; 504 if (cmd != 0) { 505 /* 506 * Execute the command. 507 */ 508 (*cmd->fcn)(addr, have_addr, count, modif); 509 510 if (cmd->flag & CS_SET_DOT) { 511 /* 512 * If command changes dot, set dot to 513 * previous address displayed (if 'ed' style). 514 */ 515 if (db_ed_style) 516 db_dot = db_prev; 517 else 518 db_dot = db_next; 519 } else { 520 /* 521 * If command does not change dot, 522 * set 'next' location to be the same. 523 */ 524 db_next = db_dot; 525 } 526 } 527 } 528 529 /*ARGSUSED*/ 530 static void 531 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 532 { 533 boolean_t full = FALSE; 534 535 if (modif[0] == 'f') 536 full = TRUE; 537 538 if (have_addr == FALSE) 539 addr = (db_expr_t)(intptr_t) kernel_map; 540 541 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 542 } 543 544 /*ARGSUSED*/ 545 static void 546 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 547 { 548 549 #ifdef MALLOC_DEBUG 550 if (!have_addr) 551 addr = 0; 552 553 debug_malloc_printit(db_printf, (vaddr_t) addr); 554 #else 555 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 556 #endif /* MALLOC_DEBUG */ 557 } 558 559 /*ARGSUSED*/ 560 static void 561 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 562 { 563 boolean_t full = FALSE; 564 565 if (modif[0] == 'f') 566 full = TRUE; 567 568 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 569 db_printf); 570 } 571 572 /*ARGSUSED*/ 573 static void 574 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 575 { 576 boolean_t full = FALSE; 577 578 if (modif[0] == 'f') 579 full = TRUE; 580 581 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 582 } 583 584 /*ARGSUSED*/ 585 static void 586 db_show_all_pages(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 587 { 588 589 uvm_page_printall(db_printf); 590 } 591 592 /*ARGSUSED*/ 593 static void 594 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 595 { 596 boolean_t full = FALSE; 597 598 if (modif[0] == 'f') 599 full = TRUE; 600 601 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 602 } 603 604 /*ARGSUSED*/ 605 static void 606 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 607 { 608 boolean_t full = FALSE; 609 610 if (modif[0] == 'f') 611 full = TRUE; 612 613 event_print(full, db_printf); 614 } 615 616 /*ARGSUSED*/ 617 static void 618 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 619 { 620 boolean_t full = FALSE; 621 622 if (modif[0] == 'f') 623 full = TRUE; 624 625 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 626 } 627 628 static void 629 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 630 { 631 boolean_t full = FALSE; 632 633 if (modif[0] == 'f') 634 full = TRUE; 635 636 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 637 } 638 639 /*ARGSUSED*/ 640 static void 641 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 642 const char *modif) 643 { 644 645 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf); 646 } 647 648 /*ARGSUSED*/ 649 static void 650 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 651 { 652 653 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 654 } 655 656 /*ARGSUSED*/ 657 static void 658 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 659 const char *modif) 660 { 661 662 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 663 } 664 665 /*ARGSUSED*/ 666 static void 667 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 668 { 669 670 uvmexp_print(db_printf); 671 } 672 673 /* 674 * Call random function: 675 * !expr(arg,arg,arg) 676 */ 677 /*ARGSUSED*/ 678 static void 679 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 680 { 681 db_expr_t fn_addr; 682 #define MAXARGS 11 683 db_expr_t args[MAXARGS]; 684 int nargs = 0; 685 db_expr_t retval; 686 db_expr_t (*func)(db_expr_t, ...); 687 int t; 688 689 if (!db_expression(&fn_addr)) { 690 db_printf("Bad function\n"); 691 db_flush_lex(); 692 return; 693 } 694 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 695 696 t = db_read_token(); 697 if (t == tLPAREN) { 698 if (db_expression(&args[0])) { 699 nargs++; 700 while ((t = db_read_token()) == tCOMMA) { 701 if (nargs == MAXARGS) { 702 db_printf("Too many arguments\n"); 703 db_flush_lex(); 704 return; 705 } 706 if (!db_expression(&args[nargs])) { 707 db_printf("Argument missing\n"); 708 db_flush_lex(); 709 return; 710 } 711 nargs++; 712 } 713 db_unread_token(t); 714 } 715 if (db_read_token() != tRPAREN) { 716 db_printf("?\n"); 717 db_flush_lex(); 718 return; 719 } 720 } 721 db_skip_to_eol(); 722 723 while (nargs < MAXARGS) { 724 args[nargs++] = 0; 725 } 726 727 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 728 args[5], args[6], args[7], args[8], args[9]); 729 db_printf("%s\n", db_num_to_str(retval)); 730 } 731 732 static void 733 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 734 { 735 db_expr_t bootflags; 736 737 /* Flags, default to RB_AUTOBOOT */ 738 if (!db_expression(&bootflags)) 739 bootflags = (db_expr_t)RB_AUTOBOOT; 740 if (db_read_token() != tEOL) { 741 db_error("?\n"); 742 /*NOTREACHED*/ 743 } 744 /* 745 * We are leaving DDB, never to return upward. 746 * Clear db_recover so that we can debug faults in functions 747 * called from cpu_reboot. 748 */ 749 db_recover = 0; 750 cpu_reboot((int)bootflags, NULL); 751 } 752 753 static void 754 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 755 { 756 int mode, t; 757 758 t = db_read_token(); 759 if (t == tSLASH) { 760 t = db_read_token(); 761 if (t != tIDENT) { 762 bad_modifier: 763 db_printf("Bad modifier\n"); 764 db_flush_lex(); 765 return; 766 } 767 if (!strcmp(db_tok_string, "F")) 768 mode = 'F'; 769 else 770 goto bad_modifier; 771 t = db_read_token(); 772 } else 773 mode = 0; 774 775 if (t == tIDENT) 776 db_sifting(db_tok_string, mode); 777 else { 778 db_printf("Bad argument (non-string)\n"); 779 db_flush_lex(); 780 } 781 } 782 783 static void 784 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 785 { 786 register const char *cp = modif; 787 register char c; 788 void (*pr)(const char *, ...); 789 790 pr = db_printf; 791 while ((c = *cp++) != 0) 792 if (c == 'l') 793 pr = printf; 794 795 if (count == -1) 796 count = 65535; 797 798 db_stack_trace_print(addr, have_addr, count, modif, pr); 799 } 800 801 static void 802 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 803 { 804 805 /* 806 * We are leaving DDB, never to return upward. 807 * Clear db_recover so that we can debug faults in functions 808 * called from cpu_reboot. 809 */ 810 db_recover = 0; 811 cpu_reboot(RB_DUMP, NULL); 812 } 813
Indexes created Sun Sep 21 20:09:37 GMT 2025