db_command.c revision 1.84
1 /* $NetBSD: db_command.c,v 1.84 2006/02/19 18:52:29 bjh21 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 2006/02/19 18:52:29 bjh21 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 w = strlen(p); 377 while (w < width) { 378 w = DB_NEXT_TAB(w); 379 db_putchar('\t'); 380 } 381 } 382 } 383 } 384 385 static void 386 db_command(const struct db_command **last_cmdp, 387 const struct db_command *cmd_table) 388 { 389 const struct db_command *cmd; 390 int t; 391 char modif[TOK_STRING_SIZE]; 392 db_expr_t addr, count; 393 boolean_t have_addr = FALSE; 394 int result; 395 396 static db_expr_t last_count = 0; 397 398 t = db_read_token(); 399 if ((t == tEOL) || (t == tCOMMA)) { 400 /* 401 * An empty line repeats last command, at 'next'. 402 * Only a count repeats the last command with the new count. 403 */ 404 cmd = *last_cmdp; 405 addr = (db_expr_t)db_next; 406 if (t == tCOMMA) { 407 if (!db_expression(&count)) { 408 db_printf("Count missing\n"); 409 db_flush_lex(); 410 return; 411 } 412 } else 413 count = last_count; 414 have_addr = FALSE; 415 modif[0] = '\0'; 416 db_skip_to_eol(); 417 } else if (t == tEXCL) { 418 db_fncall(0, 0, 0, NULL); 419 return; 420 } else if (t != tIDENT) { 421 db_printf("?\n"); 422 db_flush_lex(); 423 return; 424 } else { 425 /* 426 * Search for command 427 */ 428 while (cmd_table) { 429 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 430 switch (result) { 431 case CMD_NONE: 432 db_printf("No such command\n"); 433 db_flush_lex(); 434 return; 435 case CMD_AMBIGUOUS: 436 db_printf("Ambiguous\n"); 437 db_flush_lex(); 438 return; 439 case CMD_HELP: 440 db_cmd_list(cmd_table); 441 db_flush_lex(); 442 return; 443 default: 444 break; 445 } 446 if ((cmd_table = cmd->more) != 0) { 447 t = db_read_token(); 448 if (t != tIDENT) { 449 db_cmd_list(cmd_table); 450 db_flush_lex(); 451 return; 452 } 453 } 454 } 455 456 if ((cmd->flag & CS_OWN) == 0) { 457 /* 458 * Standard syntax: 459 * command [/modifier] [addr] [,count] 460 */ 461 t = db_read_token(); 462 if (t == tSLASH) { 463 t = db_read_token(); 464 if (t != tIDENT) { 465 db_printf("Bad modifier\n"); 466 db_flush_lex(); 467 return; 468 } 469 strlcpy(modif, db_tok_string, sizeof(modif)); 470 } else { 471 db_unread_token(t); 472 modif[0] = '\0'; 473 } 474 475 if (db_expression(&addr)) { 476 db_dot = (db_addr_t) addr; 477 db_last_addr = db_dot; 478 have_addr = TRUE; 479 } else { 480 addr = (db_expr_t) db_dot; 481 have_addr = FALSE; 482 } 483 t = db_read_token(); 484 if (t == tCOMMA) { 485 if (!db_expression(&count)) { 486 db_printf("Count missing\n"); 487 db_flush_lex(); 488 return; 489 } 490 } else { 491 db_unread_token(t); 492 count = -1; 493 } 494 if ((cmd->flag & CS_MORE) == 0) { 495 db_skip_to_eol(); 496 } 497 } 498 } 499 *last_cmdp = cmd; 500 last_count = count; 501 if (cmd != 0) { 502 /* 503 * Execute the command. 504 */ 505 (*cmd->fcn)(addr, have_addr, count, modif); 506 507 if (cmd->flag & CS_SET_DOT) { 508 /* 509 * If command changes dot, set dot to 510 * previous address displayed (if 'ed' style). 511 */ 512 if (db_ed_style) 513 db_dot = db_prev; 514 else 515 db_dot = db_next; 516 } else { 517 /* 518 * If command does not change dot, 519 * set 'next' location to be the same. 520 */ 521 db_next = db_dot; 522 } 523 } 524 } 525 526 /*ARGSUSED*/ 527 static void 528 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 529 { 530 boolean_t full = FALSE; 531 532 if (modif[0] == 'f') 533 full = TRUE; 534 535 if (have_addr == FALSE) 536 addr = (db_expr_t)(intptr_t) kernel_map; 537 538 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 539 } 540 541 /*ARGSUSED*/ 542 static void 543 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 544 { 545 546 #ifdef MALLOC_DEBUG 547 if (!have_addr) 548 addr = 0; 549 550 debug_malloc_printit(db_printf, (vaddr_t) addr); 551 #else 552 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 553 #endif /* MALLOC_DEBUG */ 554 } 555 556 /*ARGSUSED*/ 557 static void 558 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 559 { 560 boolean_t full = FALSE; 561 562 if (modif[0] == 'f') 563 full = TRUE; 564 565 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 566 db_printf); 567 } 568 569 /*ARGSUSED*/ 570 static void 571 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 572 { 573 boolean_t full = FALSE; 574 575 if (modif[0] == 'f') 576 full = TRUE; 577 578 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 579 } 580 581 /*ARGSUSED*/ 582 static void 583 db_show_all_pages(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 584 { 585 586 uvm_page_printall(db_printf); 587 } 588 589 /*ARGSUSED*/ 590 static void 591 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 592 { 593 boolean_t full = FALSE; 594 595 if (modif[0] == 'f') 596 full = TRUE; 597 598 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 599 } 600 601 /*ARGSUSED*/ 602 static void 603 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 604 { 605 boolean_t full = FALSE; 606 607 if (modif[0] == 'f') 608 full = TRUE; 609 610 event_print(full, db_printf); 611 } 612 613 /*ARGSUSED*/ 614 static void 615 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 616 { 617 boolean_t full = FALSE; 618 619 if (modif[0] == 'f') 620 full = TRUE; 621 622 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 623 } 624 625 static void 626 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 627 { 628 boolean_t full = FALSE; 629 630 if (modif[0] == 'f') 631 full = TRUE; 632 633 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 634 } 635 636 /*ARGSUSED*/ 637 static void 638 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 639 const char *modif) 640 { 641 642 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf); 643 } 644 645 /*ARGSUSED*/ 646 static void 647 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 648 { 649 650 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 651 } 652 653 /*ARGSUSED*/ 654 static void 655 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 656 const char *modif) 657 { 658 659 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 660 } 661 662 /*ARGSUSED*/ 663 static void 664 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 665 { 666 667 uvmexp_print(db_printf); 668 } 669 670 /* 671 * Call random function: 672 * !expr(arg,arg,arg) 673 */ 674 /*ARGSUSED*/ 675 static void 676 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 677 { 678 db_expr_t fn_addr; 679 #define MAXARGS 11 680 db_expr_t args[MAXARGS]; 681 int nargs = 0; 682 db_expr_t retval; 683 db_expr_t (*func)(db_expr_t, ...); 684 int t; 685 686 if (!db_expression(&fn_addr)) { 687 db_printf("Bad function\n"); 688 db_flush_lex(); 689 return; 690 } 691 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 692 693 t = db_read_token(); 694 if (t == tLPAREN) { 695 if (db_expression(&args[0])) { 696 nargs++; 697 while ((t = db_read_token()) == tCOMMA) { 698 if (nargs == MAXARGS) { 699 db_printf("Too many arguments\n"); 700 db_flush_lex(); 701 return; 702 } 703 if (!db_expression(&args[nargs])) { 704 db_printf("Argument missing\n"); 705 db_flush_lex(); 706 return; 707 } 708 nargs++; 709 } 710 db_unread_token(t); 711 } 712 if (db_read_token() != tRPAREN) { 713 db_printf("?\n"); 714 db_flush_lex(); 715 return; 716 } 717 } 718 db_skip_to_eol(); 719 720 while (nargs < MAXARGS) { 721 args[nargs++] = 0; 722 } 723 724 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 725 args[5], args[6], args[7], args[8], args[9]); 726 db_printf("%s\n", db_num_to_str(retval)); 727 } 728 729 static void 730 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 731 { 732 db_expr_t bootflags; 733 734 /* Flags, default to RB_AUTOBOOT */ 735 if (!db_expression(&bootflags)) 736 bootflags = (db_expr_t)RB_AUTOBOOT; 737 if (db_read_token() != tEOL) { 738 db_error("?\n"); 739 /*NOTREACHED*/ 740 } 741 /* 742 * We are leaving DDB, never to return upward. 743 * Clear db_recover so that we can debug faults in functions 744 * called from cpu_reboot. 745 */ 746 db_recover = 0; 747 cpu_reboot((int)bootflags, NULL); 748 } 749 750 static void 751 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 752 { 753 int mode, t; 754 755 t = db_read_token(); 756 if (t == tSLASH) { 757 t = db_read_token(); 758 if (t != tIDENT) { 759 bad_modifier: 760 db_printf("Bad modifier\n"); 761 db_flush_lex(); 762 return; 763 } 764 if (!strcmp(db_tok_string, "F")) 765 mode = 'F'; 766 else 767 goto bad_modifier; 768 t = db_read_token(); 769 } else 770 mode = 0; 771 772 if (t == tIDENT) 773 db_sifting(db_tok_string, mode); 774 else { 775 db_printf("Bad argument (non-string)\n"); 776 db_flush_lex(); 777 } 778 } 779 780 static void 781 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 782 { 783 register const char *cp = modif; 784 register char c; 785 void (*pr)(const char *, ...); 786 787 pr = db_printf; 788 while ((c = *cp++) != 0) 789 if (c == 'l') 790 pr = printf; 791 792 if (count == -1) 793 count = 65535; 794 795 db_stack_trace_print(addr, have_addr, count, modif, pr); 796 } 797 798 static void 799 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 800 { 801 802 /* 803 * We are leaving DDB, never to return upward. 804 * Clear db_recover so that we can debug faults in functions 805 * called from cpu_reboot. 806 */ 807 db_recover = 0; 808 cpu_reboot(RB_DUMP, NULL); 809 } 810
Indexes created Sun Sep 21 14:09:52 GMT 2025