db_command.c revision 1.81
1 /* $NetBSD: db_command.c,v 1.81 2005/11/27 13:05:28 yamt 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 1.81 2005/11/27 13:05:28 yamt 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/namei.h> 47 #include <sys/pool.h> 48 #include <sys/proc.h> 49 #include <sys/vnode.h> 50 51 #include <machine/db_machdep.h> /* type definitions */ 52 53 #if defined(_KERNEL_OPT) 54 #include "opt_multiprocessor.h" 55 #endif 56 #ifdef MULTIPROCESSOR 57 #include <machine/cpu.h> 58 #endif 59 60 #include <ddb/db_lex.h> 61 #include <ddb/db_output.h> 62 #include <ddb/db_command.h> 63 #include <ddb/db_break.h> 64 #include <ddb/db_watch.h> 65 #include <ddb/db_run.h> 66 #include <ddb/db_variables.h> 67 #include <ddb/db_interface.h> 68 #include <ddb/db_sym.h> 69 #include <ddb/db_extern.h> 70 71 #include <uvm/uvm_extern.h> 72 #include <uvm/uvm_ddb.h> 73 74 #include "arp.h" 75 76 /* 77 * Results of command search. 78 */ 79 #define CMD_UNIQUE 0 80 #define CMD_FOUND 1 81 #define CMD_NONE 2 82 #define CMD_AMBIGUOUS 3 83 #define CMD_HELP 4 84 85 /* 86 * Exported global variables 87 */ 88 boolean_t db_cmd_loop_done; 89 label_t *db_recover; 90 db_addr_t db_dot; 91 db_addr_t db_last_addr; 92 db_addr_t db_prev; 93 db_addr_t db_next; 94 95 /* 96 * if 'ed' style: 'dot' is set at start of last item printed, 97 * and '+' points to next line. 98 * Otherwise: 'dot' points to next item, '..' points to last. 99 */ 100 static boolean_t db_ed_style = TRUE; 101 102 static void db_buf_print_cmd(db_expr_t, int, db_expr_t, const char *); 103 static void db_cmd_list(const struct db_command *); 104 static int db_cmd_search(const char *, const struct db_command *, 105 const struct db_command **); 106 static void db_command(const struct db_command **, 107 const struct db_command *); 108 static void db_event_print_cmd(db_expr_t, int, db_expr_t, const char *); 109 static void db_fncall(db_expr_t, int, db_expr_t, const char *); 110 static void db_malloc_print_cmd(db_expr_t, int, db_expr_t, const char *); 111 static void db_map_print_cmd(db_expr_t, int, db_expr_t, const char *); 112 static void db_namecache_print_cmd(db_expr_t, int, db_expr_t, const char *); 113 static void db_object_print_cmd(db_expr_t, int, db_expr_t, const char *); 114 static void db_page_print_cmd(db_expr_t, int, db_expr_t, const char *); 115 static void db_pool_print_cmd(db_expr_t, int, db_expr_t, const char *); 116 static void db_reboot_cmd(db_expr_t, int, db_expr_t, const char *); 117 static void db_sifting_cmd(db_expr_t, int, db_expr_t, const char *); 118 static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, const char *); 119 static void db_sync_cmd(db_expr_t, int, db_expr_t, const char *); 120 static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, const char *); 121 static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, const char *); 122 static void db_mount_print_cmd(db_expr_t, int, db_expr_t, const char *); 123 124 /* 125 * 'show' commands 126 */ 127 128 static const struct db_command db_show_all_cmds[] = { 129 { "callout", db_show_callout, 0, NULL }, 130 { "procs", db_show_all_procs, 0, NULL }, 131 { NULL, NULL, 0, NULL } 132 }; 133 134 static const struct db_command db_show_cmds[] = { 135 { "all", NULL, 0, db_show_all_cmds }, 136 #if defined(INET) && (NARP > 0) 137 { "arptab", db_show_arptab, 0, NULL }, 138 #endif 139 { "breaks", db_listbreak_cmd, 0, NULL }, 140 { "buf", db_buf_print_cmd, 0, NULL }, 141 { "event", db_event_print_cmd, 0, NULL }, 142 { "malloc", db_malloc_print_cmd, 0, NULL }, 143 { "map", db_map_print_cmd, 0, NULL }, 144 { "mount", db_mount_print_cmd, 0, NULL }, 145 { "ncache", db_namecache_print_cmd, 0, NULL }, 146 { "object", db_object_print_cmd, 0, NULL }, 147 { "page", db_page_print_cmd, 0, NULL }, 148 { "pool", db_pool_print_cmd, 0, NULL }, 149 { "registers", db_show_regs, 0, NULL }, 150 { "sched_qs", db_show_sched_qs, 0, NULL }, 151 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 152 { "vnode", db_vnode_print_cmd, 0, NULL }, 153 { "watches", db_listwatch_cmd, 0, NULL }, 154 { NULL, NULL, 0, NULL } 155 }; 156 157 /* arch/<arch>/<arch>/db_interface.c */ 158 #ifdef DB_MACHINE_COMMANDS 159 extern const struct db_command db_machine_command_table[]; 160 #endif 161 162 static const struct db_command db_command_table[] = { 163 { "b", db_breakpoint_cmd, 0, NULL }, 164 { "break", db_breakpoint_cmd, 0, NULL }, 165 { "bt", db_stack_trace_cmd, 0, NULL }, 166 { "c", db_continue_cmd, 0, NULL }, 167 { "call", db_fncall, CS_OWN, NULL }, 168 { "callout", db_show_callout, 0, NULL }, 169 { "continue", db_continue_cmd, 0, NULL }, 170 { "d", db_delete_cmd, 0, NULL }, 171 { "delete", db_delete_cmd, 0, NULL }, 172 { "dmesg", db_dmesg, 0, NULL }, 173 { "dwatch", db_deletewatch_cmd, 0, NULL }, 174 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 175 { "kill", db_kill_proc, CS_OWN, NULL }, 176 #ifdef KGDB 177 { "kgdb", db_kgdb_cmd, 0, NULL }, 178 #endif 179 #ifdef DB_MACHINE_COMMANDS 180 { "machine", NULL, 0, db_machine_command_table }, 181 #endif 182 { "match", db_trace_until_matching_cmd,0, NULL }, 183 { "next", db_trace_until_matching_cmd,0, NULL }, 184 { "p", db_print_cmd, 0, NULL }, 185 { "print", db_print_cmd, 0, NULL }, 186 { "ps", db_show_all_procs, 0, NULL }, 187 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 188 { "s", db_single_step_cmd, 0, NULL }, 189 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 190 { "set", db_set_cmd, CS_OWN, NULL }, 191 { "show", NULL, 0, db_show_cmds }, 192 { "sifting", db_sifting_cmd, CS_OWN, NULL }, 193 { "step", db_single_step_cmd, 0, NULL }, 194 { "sync", db_sync_cmd, CS_OWN, NULL }, 195 { "trace", db_stack_trace_cmd, 0, NULL }, 196 { "until", db_trace_until_call_cmd,0, NULL }, 197 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 198 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 199 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 200 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 201 { NULL, NULL, 0, NULL } 202 }; 203 204 static const struct db_command *db_last_command = NULL; 205 #if defined(DDB_COMMANDONENTER) 206 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 207 #else /* defined(DDB_COMMANDONENTER) */ 208 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 209 #endif /* defined(DDB_COMMANDONENTER) */ 210 #define DB_LINE_SEP ';' 211 212 /* 213 * Utility routine - discard tokens through end-of-line. 214 */ 215 void 216 db_skip_to_eol(void) 217 { 218 int t; 219 220 do { 221 t = db_read_token(); 222 } while (t != tEOL); 223 } 224 225 void 226 db_error(s) 227 const char *s; 228 { 229 230 if (s) 231 db_printf("%s", s); 232 db_flush_lex(); 233 longjmp(db_recover); 234 } 235 236 static void 237 db_execute_commandlist(const char *cmdlist) 238 { 239 const char *cmd = cmdlist; 240 const struct db_command *dummy = NULL; 241 242 while (*cmd != '\0') { 243 const char *ep = cmd; 244 245 while (*ep != '\0' && *ep != DB_LINE_SEP) { 246 ep++; 247 } 248 db_set_line(cmd, ep); 249 db_command(&dummy, db_command_table); 250 cmd = ep; 251 if (*cmd == DB_LINE_SEP) { 252 cmd++; 253 } 254 } 255 } 256 257 void 258 db_command_loop(void) 259 { 260 label_t db_jmpbuf; 261 label_t *savejmp; 262 263 /* 264 * Initialize 'prev' and 'next' to dot. 265 */ 266 db_prev = db_dot; 267 db_next = db_dot; 268 269 db_cmd_loop_done = 0; 270 271 savejmp = db_recover; 272 db_recover = &db_jmpbuf; 273 (void) setjmp(&db_jmpbuf); 274 275 db_execute_commandlist(db_cmd_on_enter); 276 277 while (!db_cmd_loop_done) { 278 if (db_print_position() != 0) 279 db_printf("\n"); 280 db_output_line = 0; 281 282 283 #ifdef MULTIPROCESSOR 284 db_printf("db{%ld}> ", (long)cpu_number()); 285 #else 286 db_printf("db> "); 287 #endif 288 (void) db_read_line(); 289 290 db_command(&db_last_command, db_command_table); 291 } 292 293 db_recover = savejmp; 294 } 295 296 /* 297 * Search for command prefix. 298 */ 299 static int 300 db_cmd_search(const char *name, const struct db_command *table, 301 const struct db_command **cmdp) 302 { 303 const struct db_command *cmd; 304 int result = CMD_NONE; 305 306 for (cmd = table; cmd->name != 0; cmd++) { 307 const char *lp; 308 const char *rp; 309 int c; 310 311 lp = name; 312 rp = cmd->name; 313 while ((c = *lp) == *rp) { 314 if (c == 0) { 315 /* complete match */ 316 *cmdp = cmd; 317 return (CMD_UNIQUE); 318 } 319 lp++; 320 rp++; 321 } 322 if (c == 0) { 323 /* end of name, not end of command - 324 partial match */ 325 if (result == CMD_FOUND) { 326 result = CMD_AMBIGUOUS; 327 /* but keep looking for a full match - 328 this lets us match single letters */ 329 } else { 330 *cmdp = cmd; 331 result = CMD_FOUND; 332 } 333 } 334 } 335 if (result == CMD_NONE) { 336 /* check for 'help' */ 337 if (name[0] == 'h' && name[1] == 'e' 338 && name[2] == 'l' && name[3] == 'p') 339 result = CMD_HELP; 340 } 341 return (result); 342 } 343 344 static void 345 db_cmd_list(const struct db_command *table) 346 { 347 int i, j, w, columns, lines, width=0, numcmds; 348 const char *p; 349 350 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 351 w = strlen(table[numcmds].name); 352 if (w > width) 353 width = w; 354 } 355 width = DB_NEXT_TAB(width); 356 357 columns = db_max_width / width; 358 if (columns == 0) 359 columns = 1; 360 lines = (numcmds + columns - 1) / columns; 361 for (i = 0; i < lines; i++) { 362 for (j = 0; j < columns; j++) { 363 p = table[j * lines + i].name; 364 if (p) 365 db_printf("%s", p); 366 if (j * lines + i + lines >= numcmds) { 367 db_putchar('\n'); 368 break; 369 } 370 w = strlen(p); 371 while (w < width) { 372 w = DB_NEXT_TAB(w); 373 db_putchar('\t'); 374 } 375 } 376 } 377 } 378 379 static void 380 db_command(const struct db_command **last_cmdp, 381 const struct db_command *cmd_table) 382 { 383 const struct db_command *cmd; 384 int t; 385 char modif[TOK_STRING_SIZE]; 386 db_expr_t addr, count; 387 boolean_t have_addr = FALSE; 388 int result; 389 390 static db_expr_t last_count = 0; 391 392 t = db_read_token(); 393 if ((t == tEOL) || (t == tCOMMA)) { 394 /* 395 * An empty line repeats last command, at 'next'. 396 * Only a count repeats the last command with the new count. 397 */ 398 cmd = *last_cmdp; 399 addr = (db_expr_t)db_next; 400 if (t == tCOMMA) { 401 if (!db_expression(&count)) { 402 db_printf("Count missing\n"); 403 db_flush_lex(); 404 return; 405 } 406 } else 407 count = last_count; 408 have_addr = FALSE; 409 modif[0] = '\0'; 410 db_skip_to_eol(); 411 } else if (t == tEXCL) { 412 db_fncall(0, 0, 0, NULL); 413 return; 414 } else if (t != tIDENT) { 415 db_printf("?\n"); 416 db_flush_lex(); 417 return; 418 } else { 419 /* 420 * Search for command 421 */ 422 while (cmd_table) { 423 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 424 switch (result) { 425 case CMD_NONE: 426 db_printf("No such command\n"); 427 db_flush_lex(); 428 return; 429 case CMD_AMBIGUOUS: 430 db_printf("Ambiguous\n"); 431 db_flush_lex(); 432 return; 433 case CMD_HELP: 434 db_cmd_list(cmd_table); 435 db_flush_lex(); 436 return; 437 default: 438 break; 439 } 440 if ((cmd_table = cmd->more) != 0) { 441 t = db_read_token(); 442 if (t != tIDENT) { 443 db_cmd_list(cmd_table); 444 db_flush_lex(); 445 return; 446 } 447 } 448 } 449 450 if ((cmd->flag & CS_OWN) == 0) { 451 /* 452 * Standard syntax: 453 * command [/modifier] [addr] [,count] 454 */ 455 t = db_read_token(); 456 if (t == tSLASH) { 457 t = db_read_token(); 458 if (t != tIDENT) { 459 db_printf("Bad modifier\n"); 460 db_flush_lex(); 461 return; 462 } 463 strlcpy(modif, db_tok_string, sizeof(modif)); 464 } else { 465 db_unread_token(t); 466 modif[0] = '\0'; 467 } 468 469 if (db_expression(&addr)) { 470 db_dot = (db_addr_t) addr; 471 db_last_addr = db_dot; 472 have_addr = TRUE; 473 } else { 474 addr = (db_expr_t) db_dot; 475 have_addr = FALSE; 476 } 477 t = db_read_token(); 478 if (t == tCOMMA) { 479 if (!db_expression(&count)) { 480 db_printf("Count missing\n"); 481 db_flush_lex(); 482 return; 483 } 484 } else { 485 db_unread_token(t); 486 count = -1; 487 } 488 if ((cmd->flag & CS_MORE) == 0) { 489 db_skip_to_eol(); 490 } 491 } 492 } 493 *last_cmdp = cmd; 494 last_count = count; 495 if (cmd != 0) { 496 /* 497 * Execute the command. 498 */ 499 (*cmd->fcn)(addr, have_addr, count, modif); 500 501 if (cmd->flag & CS_SET_DOT) { 502 /* 503 * If command changes dot, set dot to 504 * previous address displayed (if 'ed' style). 505 */ 506 if (db_ed_style) 507 db_dot = db_prev; 508 else 509 db_dot = db_next; 510 } else { 511 /* 512 * If command does not change dot, 513 * set 'next' location to be the same. 514 */ 515 db_next = db_dot; 516 } 517 } 518 } 519 520 /*ARGSUSED*/ 521 static void 522 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 523 { 524 boolean_t full = FALSE; 525 526 if (modif[0] == 'f') 527 full = TRUE; 528 529 if (have_addr == FALSE) 530 addr = (db_expr_t)(intptr_t) kernel_map; 531 532 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 533 } 534 535 /*ARGSUSED*/ 536 static void 537 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 538 { 539 540 #ifdef MALLOC_DEBUG 541 if (!have_addr) 542 addr = 0; 543 544 debug_malloc_printit(db_printf, (vaddr_t) addr); 545 #else 546 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 547 #endif /* MALLOC_DEBUG */ 548 } 549 550 /*ARGSUSED*/ 551 static void 552 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 553 { 554 boolean_t full = FALSE; 555 556 if (modif[0] == 'f') 557 full = TRUE; 558 559 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 560 db_printf); 561 } 562 563 /*ARGSUSED*/ 564 static void 565 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 566 { 567 boolean_t full = FALSE; 568 569 if (modif[0] == 'f') 570 full = TRUE; 571 572 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 573 } 574 575 /*ARGSUSED*/ 576 static void 577 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 578 { 579 boolean_t full = FALSE; 580 581 if (modif[0] == 'f') 582 full = TRUE; 583 584 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 585 } 586 587 /*ARGSUSED*/ 588 static void 589 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 590 { 591 boolean_t full = FALSE; 592 593 if (modif[0] == 'f') 594 full = TRUE; 595 596 event_print(full, db_printf); 597 } 598 599 /*ARGSUSED*/ 600 static void 601 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 602 { 603 boolean_t full = FALSE; 604 605 if (modif[0] == 'f') 606 full = TRUE; 607 608 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 609 } 610 611 static void 612 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 613 { 614 boolean_t full = FALSE; 615 616 if (modif[0] == 'f') 617 full = TRUE; 618 619 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 620 } 621 622 /*ARGSUSED*/ 623 static void 624 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 625 { 626 627 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 628 } 629 630 /*ARGSUSED*/ 631 static void 632 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 633 const char *modif) 634 { 635 636 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 637 } 638 639 /*ARGSUSED*/ 640 static void 641 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 642 { 643 644 uvmexp_print(db_printf); 645 } 646 647 /* 648 * Call random function: 649 * !expr(arg,arg,arg) 650 */ 651 /*ARGSUSED*/ 652 static void 653 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 654 { 655 db_expr_t fn_addr; 656 #define MAXARGS 11 657 db_expr_t args[MAXARGS]; 658 int nargs = 0; 659 db_expr_t retval; 660 db_expr_t (*func)(db_expr_t, ...); 661 int t; 662 663 if (!db_expression(&fn_addr)) { 664 db_printf("Bad function\n"); 665 db_flush_lex(); 666 return; 667 } 668 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 669 670 t = db_read_token(); 671 if (t == tLPAREN) { 672 if (db_expression(&args[0])) { 673 nargs++; 674 while ((t = db_read_token()) == tCOMMA) { 675 if (nargs == MAXARGS) { 676 db_printf("Too many arguments\n"); 677 db_flush_lex(); 678 return; 679 } 680 if (!db_expression(&args[nargs])) { 681 db_printf("Argument missing\n"); 682 db_flush_lex(); 683 return; 684 } 685 nargs++; 686 } 687 db_unread_token(t); 688 } 689 if (db_read_token() != tRPAREN) { 690 db_printf("?\n"); 691 db_flush_lex(); 692 return; 693 } 694 } 695 db_skip_to_eol(); 696 697 while (nargs < MAXARGS) { 698 args[nargs++] = 0; 699 } 700 701 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 702 args[5], args[6], args[7], args[8], args[9]); 703 db_printf("%s\n", db_num_to_str(retval)); 704 } 705 706 static void 707 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 708 { 709 db_expr_t bootflags; 710 711 /* Flags, default to RB_AUTOBOOT */ 712 if (!db_expression(&bootflags)) 713 bootflags = (db_expr_t)RB_AUTOBOOT; 714 if (db_read_token() != tEOL) { 715 db_error("?\n"); 716 /*NOTREACHED*/ 717 } 718 /* 719 * We are leaving DDB, never to return upward. 720 * Clear db_recover so that we can debug faults in functions 721 * called from cpu_reboot. 722 */ 723 db_recover = 0; 724 cpu_reboot((int)bootflags, NULL); 725 } 726 727 static void 728 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 729 { 730 int mode, t; 731 732 t = db_read_token(); 733 if (t == tSLASH) { 734 t = db_read_token(); 735 if (t != tIDENT) { 736 bad_modifier: 737 db_printf("Bad modifier\n"); 738 db_flush_lex(); 739 return; 740 } 741 if (!strcmp(db_tok_string, "F")) 742 mode = 'F'; 743 else 744 goto bad_modifier; 745 t = db_read_token(); 746 } else 747 mode = 0; 748 749 if (t == tIDENT) 750 db_sifting(db_tok_string, mode); 751 else { 752 db_printf("Bad argument (non-string)\n"); 753 db_flush_lex(); 754 } 755 } 756 757 static void 758 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 759 { 760 register const char *cp = modif; 761 register char c; 762 void (*pr)(const char *, ...); 763 764 pr = db_printf; 765 while ((c = *cp++) != 0) 766 if (c == 'l') 767 pr = printf; 768 769 if (count == -1) 770 count = 65535; 771 772 db_stack_trace_print(addr, have_addr, count, modif, pr); 773 } 774 775 static void 776 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 777 { 778 779 /* 780 * We are leaving DDB, never to return upward. 781 * Clear db_recover so that we can debug faults in functions 782 * called from cpu_reboot. 783 */ 784 db_recover = 0; 785 cpu_reboot(RB_DUMP, NULL); 786 } 787
Indexes created Sat Sep 20 22:09:52 GMT 2025