db_command.c revision 1.83
1 /* $NetBSD: db_command.c,v 1.83 2006/01/24 13:02:57 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 1.83 2006/01/24 13:02:57 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/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_pool_print_cmd(db_expr_t, int, db_expr_t, const char *); 117 static void db_reboot_cmd(db_expr_t, int, db_expr_t, const char *); 118 static void db_sifting_cmd(db_expr_t, int, db_expr_t, const char *); 119 static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, const char *); 120 static void db_sync_cmd(db_expr_t, int, db_expr_t, const char *); 121 static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, const char *); 122 static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, const char *); 123 static void db_mount_print_cmd(db_expr_t, int, db_expr_t, const char *); 124 static void db_mbuf_print_cmd(db_expr_t, int, db_expr_t, const char *); 125 126 /* 127 * 'show' commands 128 */ 129 130 static const struct db_command db_show_all_cmds[] = { 131 { "callout", db_show_callout, 0, NULL }, 132 { "procs", db_show_all_procs, 0, NULL }, 133 { "pools", db_show_all_pools, 0, NULL }, 134 { NULL, NULL, 0, NULL } 135 }; 136 137 static const struct db_command db_show_cmds[] = { 138 { "all", NULL, 0, db_show_all_cmds }, 139 #if defined(INET) && (NARP > 0) 140 { "arptab", db_show_arptab, 0, NULL }, 141 #endif 142 { "breaks", db_listbreak_cmd, 0, NULL }, 143 { "buf", db_buf_print_cmd, 0, NULL }, 144 { "event", db_event_print_cmd, 0, NULL }, 145 { "malloc", db_malloc_print_cmd, 0, NULL }, 146 { "map", db_map_print_cmd, 0, NULL }, 147 { "mount", db_mount_print_cmd, 0, NULL }, 148 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 149 { "ncache", db_namecache_print_cmd, 0, NULL }, 150 { "object", db_object_print_cmd, 0, NULL }, 151 { "page", db_page_print_cmd, 0, NULL }, 152 { "pool", db_pool_print_cmd, 0, NULL }, 153 { "registers", db_show_regs, 0, NULL }, 154 { "sched_qs", db_show_sched_qs, 0, NULL }, 155 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 156 { "vnode", db_vnode_print_cmd, 0, NULL }, 157 { "watches", db_listwatch_cmd, 0, NULL }, 158 { NULL, NULL, 0, NULL } 159 }; 160 161 /* arch/<arch>/<arch>/db_interface.c */ 162 #ifdef DB_MACHINE_COMMANDS 163 extern const struct db_command db_machine_command_table[]; 164 #endif 165 166 static const struct db_command db_command_table[] = { 167 { "b", db_breakpoint_cmd, 0, NULL }, 168 { "break", db_breakpoint_cmd, 0, NULL }, 169 { "bt", db_stack_trace_cmd, 0, NULL }, 170 { "c", db_continue_cmd, 0, NULL }, 171 { "call", db_fncall, CS_OWN, NULL }, 172 { "callout", db_show_callout, 0, NULL }, 173 { "continue", db_continue_cmd, 0, NULL }, 174 { "d", db_delete_cmd, 0, NULL }, 175 { "delete", db_delete_cmd, 0, NULL }, 176 { "dmesg", db_dmesg, 0, NULL }, 177 { "dwatch", db_deletewatch_cmd, 0, NULL }, 178 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 179 { "kill", db_kill_proc, CS_OWN, NULL }, 180 #ifdef KGDB 181 { "kgdb", db_kgdb_cmd, 0, NULL }, 182 #endif 183 #ifdef DB_MACHINE_COMMANDS 184 { "machine", NULL, 0, db_machine_command_table }, 185 #endif 186 { "match", db_trace_until_matching_cmd,0, NULL }, 187 { "next", db_trace_until_matching_cmd,0, NULL }, 188 { "p", db_print_cmd, 0, NULL }, 189 { "print", db_print_cmd, 0, NULL }, 190 { "ps", db_show_all_procs, 0, NULL }, 191 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 192 { "s", db_single_step_cmd, 0, NULL }, 193 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 194 { "set", db_set_cmd, CS_OWN, NULL }, 195 { "show", NULL, 0, db_show_cmds }, 196 { "sifting", db_sifting_cmd, CS_OWN, NULL }, 197 { "step", db_single_step_cmd, 0, NULL }, 198 { "sync", db_sync_cmd, CS_OWN, NULL }, 199 { "trace", db_stack_trace_cmd, 0, NULL }, 200 { "until", db_trace_until_call_cmd,0, NULL }, 201 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 202 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 203 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 204 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 205 { NULL, NULL, 0, NULL } 206 }; 207 208 static const struct db_command *db_last_command = NULL; 209 #if defined(DDB_COMMANDONENTER) 210 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 211 #else /* defined(DDB_COMMANDONENTER) */ 212 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 213 #endif /* defined(DDB_COMMANDONENTER) */ 214 #define DB_LINE_SEP ';' 215 216 /* 217 * Utility routine - discard tokens through end-of-line. 218 */ 219 void 220 db_skip_to_eol(void) 221 { 222 int t; 223 224 do { 225 t = db_read_token(); 226 } while (t != tEOL); 227 } 228 229 void 230 db_error(s) 231 const char *s; 232 { 233 234 if (s) 235 db_printf("%s", s); 236 db_flush_lex(); 237 longjmp(db_recover); 238 } 239 240 static void 241 db_execute_commandlist(const char *cmdlist) 242 { 243 const char *cmd = cmdlist; 244 const struct db_command *dummy = NULL; 245 246 while (*cmd != '\0') { 247 const char *ep = cmd; 248 249 while (*ep != '\0' && *ep != DB_LINE_SEP) { 250 ep++; 251 } 252 db_set_line(cmd, ep); 253 db_command(&dummy, db_command_table); 254 cmd = ep; 255 if (*cmd == DB_LINE_SEP) { 256 cmd++; 257 } 258 } 259 } 260 261 void 262 db_command_loop(void) 263 { 264 label_t db_jmpbuf; 265 label_t *savejmp; 266 267 /* 268 * Initialize 'prev' and 'next' to dot. 269 */ 270 db_prev = db_dot; 271 db_next = db_dot; 272 273 db_cmd_loop_done = 0; 274 275 savejmp = db_recover; 276 db_recover = &db_jmpbuf; 277 (void) setjmp(&db_jmpbuf); 278 279 db_execute_commandlist(db_cmd_on_enter); 280 281 while (!db_cmd_loop_done) { 282 if (db_print_position() != 0) 283 db_printf("\n"); 284 db_output_line = 0; 285 286 287 #ifdef MULTIPROCESSOR 288 db_printf("db{%ld}> ", (long)cpu_number()); 289 #else 290 db_printf("db> "); 291 #endif 292 (void) db_read_line(); 293 294 db_command(&db_last_command, db_command_table); 295 } 296 297 db_recover = savejmp; 298 } 299 300 /* 301 * Search for command prefix. 302 */ 303 static int 304 db_cmd_search(const char *name, const struct db_command *table, 305 const struct db_command **cmdp) 306 { 307 const struct db_command *cmd; 308 int result = CMD_NONE; 309 310 for (cmd = table; cmd->name != 0; cmd++) { 311 const char *lp; 312 const char *rp; 313 int c; 314 315 lp = name; 316 rp = cmd->name; 317 while ((c = *lp) == *rp) { 318 if (c == 0) { 319 /* complete match */ 320 *cmdp = cmd; 321 return (CMD_UNIQUE); 322 } 323 lp++; 324 rp++; 325 } 326 if (c == 0) { 327 /* end of name, not end of command - 328 partial match */ 329 if (result == CMD_FOUND) { 330 result = CMD_AMBIGUOUS; 331 /* but keep looking for a full match - 332 this lets us match single letters */ 333 } else { 334 *cmdp = cmd; 335 result = CMD_FOUND; 336 } 337 } 338 } 339 if (result == CMD_NONE) { 340 /* check for 'help' */ 341 if (name[0] == 'h' && name[1] == 'e' 342 && name[2] == 'l' && name[3] == 'p') 343 result = CMD_HELP; 344 } 345 return (result); 346 } 347 348 static void 349 db_cmd_list(const struct db_command *table) 350 { 351 int i, j, w, columns, lines, width=0, numcmds; 352 const char *p; 353 354 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 355 w = strlen(table[numcmds].name); 356 if (w > width) 357 width = w; 358 } 359 width = DB_NEXT_TAB(width); 360 361 columns = db_max_width / width; 362 if (columns == 0) 363 columns = 1; 364 lines = (numcmds + columns - 1) / columns; 365 for (i = 0; i < lines; i++) { 366 for (j = 0; j < columns; j++) { 367 p = table[j * lines + i].name; 368 if (p) 369 db_printf("%s", p); 370 if (j * lines + i + lines >= numcmds) { 371 db_putchar('\n'); 372 break; 373 } 374 w = strlen(p); 375 while (w < width) { 376 w = DB_NEXT_TAB(w); 377 db_putchar('\t'); 378 } 379 } 380 } 381 } 382 383 static void 384 db_command(const struct db_command **last_cmdp, 385 const struct db_command *cmd_table) 386 { 387 const struct db_command *cmd; 388 int t; 389 char modif[TOK_STRING_SIZE]; 390 db_expr_t addr, count; 391 boolean_t have_addr = FALSE; 392 int result; 393 394 static db_expr_t last_count = 0; 395 396 t = db_read_token(); 397 if ((t == tEOL) || (t == tCOMMA)) { 398 /* 399 * An empty line repeats last command, at 'next'. 400 * Only a count repeats the last command with the new count. 401 */ 402 cmd = *last_cmdp; 403 addr = (db_expr_t)db_next; 404 if (t == tCOMMA) { 405 if (!db_expression(&count)) { 406 db_printf("Count missing\n"); 407 db_flush_lex(); 408 return; 409 } 410 } else 411 count = last_count; 412 have_addr = FALSE; 413 modif[0] = '\0'; 414 db_skip_to_eol(); 415 } else if (t == tEXCL) { 416 db_fncall(0, 0, 0, NULL); 417 return; 418 } else if (t != tIDENT) { 419 db_printf("?\n"); 420 db_flush_lex(); 421 return; 422 } else { 423 /* 424 * Search for command 425 */ 426 while (cmd_table) { 427 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 428 switch (result) { 429 case CMD_NONE: 430 db_printf("No such command\n"); 431 db_flush_lex(); 432 return; 433 case CMD_AMBIGUOUS: 434 db_printf("Ambiguous\n"); 435 db_flush_lex(); 436 return; 437 case CMD_HELP: 438 db_cmd_list(cmd_table); 439 db_flush_lex(); 440 return; 441 default: 442 break; 443 } 444 if ((cmd_table = cmd->more) != 0) { 445 t = db_read_token(); 446 if (t != tIDENT) { 447 db_cmd_list(cmd_table); 448 db_flush_lex(); 449 return; 450 } 451 } 452 } 453 454 if ((cmd->flag & CS_OWN) == 0) { 455 /* 456 * Standard syntax: 457 * command [/modifier] [addr] [,count] 458 */ 459 t = db_read_token(); 460 if (t == tSLASH) { 461 t = db_read_token(); 462 if (t != tIDENT) { 463 db_printf("Bad modifier\n"); 464 db_flush_lex(); 465 return; 466 } 467 strlcpy(modif, db_tok_string, sizeof(modif)); 468 } else { 469 db_unread_token(t); 470 modif[0] = '\0'; 471 } 472 473 if (db_expression(&addr)) { 474 db_dot = (db_addr_t) addr; 475 db_last_addr = db_dot; 476 have_addr = TRUE; 477 } else { 478 addr = (db_expr_t) db_dot; 479 have_addr = FALSE; 480 } 481 t = db_read_token(); 482 if (t == tCOMMA) { 483 if (!db_expression(&count)) { 484 db_printf("Count missing\n"); 485 db_flush_lex(); 486 return; 487 } 488 } else { 489 db_unread_token(t); 490 count = -1; 491 } 492 if ((cmd->flag & CS_MORE) == 0) { 493 db_skip_to_eol(); 494 } 495 } 496 } 497 *last_cmdp = cmd; 498 last_count = count; 499 if (cmd != 0) { 500 /* 501 * Execute the command. 502 */ 503 (*cmd->fcn)(addr, have_addr, count, modif); 504 505 if (cmd->flag & CS_SET_DOT) { 506 /* 507 * If command changes dot, set dot to 508 * previous address displayed (if 'ed' style). 509 */ 510 if (db_ed_style) 511 db_dot = db_prev; 512 else 513 db_dot = db_next; 514 } else { 515 /* 516 * If command does not change dot, 517 * set 'next' location to be the same. 518 */ 519 db_next = db_dot; 520 } 521 } 522 } 523 524 /*ARGSUSED*/ 525 static void 526 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 527 { 528 boolean_t full = FALSE; 529 530 if (modif[0] == 'f') 531 full = TRUE; 532 533 if (have_addr == FALSE) 534 addr = (db_expr_t)(intptr_t) kernel_map; 535 536 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 537 } 538 539 /*ARGSUSED*/ 540 static void 541 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 542 { 543 544 #ifdef MALLOC_DEBUG 545 if (!have_addr) 546 addr = 0; 547 548 debug_malloc_printit(db_printf, (vaddr_t) addr); 549 #else 550 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 551 #endif /* MALLOC_DEBUG */ 552 } 553 554 /*ARGSUSED*/ 555 static void 556 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 557 { 558 boolean_t full = FALSE; 559 560 if (modif[0] == 'f') 561 full = TRUE; 562 563 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 564 db_printf); 565 } 566 567 /*ARGSUSED*/ 568 static void 569 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 570 { 571 boolean_t full = FALSE; 572 573 if (modif[0] == 'f') 574 full = TRUE; 575 576 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 577 } 578 579 /*ARGSUSED*/ 580 static void 581 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 582 { 583 boolean_t full = FALSE; 584 585 if (modif[0] == 'f') 586 full = TRUE; 587 588 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 589 } 590 591 /*ARGSUSED*/ 592 static void 593 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 594 { 595 boolean_t full = FALSE; 596 597 if (modif[0] == 'f') 598 full = TRUE; 599 600 event_print(full, db_printf); 601 } 602 603 /*ARGSUSED*/ 604 static void 605 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 606 { 607 boolean_t full = FALSE; 608 609 if (modif[0] == 'f') 610 full = TRUE; 611 612 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 613 } 614 615 static void 616 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 617 { 618 boolean_t full = FALSE; 619 620 if (modif[0] == 'f') 621 full = TRUE; 622 623 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 624 } 625 626 /*ARGSUSED*/ 627 static void 628 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 629 const char *modif) 630 { 631 632 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf); 633 } 634 635 /*ARGSUSED*/ 636 static void 637 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 638 { 639 640 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 641 } 642 643 /*ARGSUSED*/ 644 static void 645 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 646 const char *modif) 647 { 648 649 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 650 } 651 652 /*ARGSUSED*/ 653 static void 654 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 655 { 656 657 uvmexp_print(db_printf); 658 } 659 660 /* 661 * Call random function: 662 * !expr(arg,arg,arg) 663 */ 664 /*ARGSUSED*/ 665 static void 666 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 667 { 668 db_expr_t fn_addr; 669 #define MAXARGS 11 670 db_expr_t args[MAXARGS]; 671 int nargs = 0; 672 db_expr_t retval; 673 db_expr_t (*func)(db_expr_t, ...); 674 int t; 675 676 if (!db_expression(&fn_addr)) { 677 db_printf("Bad function\n"); 678 db_flush_lex(); 679 return; 680 } 681 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 682 683 t = db_read_token(); 684 if (t == tLPAREN) { 685 if (db_expression(&args[0])) { 686 nargs++; 687 while ((t = db_read_token()) == tCOMMA) { 688 if (nargs == MAXARGS) { 689 db_printf("Too many arguments\n"); 690 db_flush_lex(); 691 return; 692 } 693 if (!db_expression(&args[nargs])) { 694 db_printf("Argument missing\n"); 695 db_flush_lex(); 696 return; 697 } 698 nargs++; 699 } 700 db_unread_token(t); 701 } 702 if (db_read_token() != tRPAREN) { 703 db_printf("?\n"); 704 db_flush_lex(); 705 return; 706 } 707 } 708 db_skip_to_eol(); 709 710 while (nargs < MAXARGS) { 711 args[nargs++] = 0; 712 } 713 714 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 715 args[5], args[6], args[7], args[8], args[9]); 716 db_printf("%s\n", db_num_to_str(retval)); 717 } 718 719 static void 720 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 721 { 722 db_expr_t bootflags; 723 724 /* Flags, default to RB_AUTOBOOT */ 725 if (!db_expression(&bootflags)) 726 bootflags = (db_expr_t)RB_AUTOBOOT; 727 if (db_read_token() != tEOL) { 728 db_error("?\n"); 729 /*NOTREACHED*/ 730 } 731 /* 732 * We are leaving DDB, never to return upward. 733 * Clear db_recover so that we can debug faults in functions 734 * called from cpu_reboot. 735 */ 736 db_recover = 0; 737 cpu_reboot((int)bootflags, NULL); 738 } 739 740 static void 741 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 742 { 743 int mode, t; 744 745 t = db_read_token(); 746 if (t == tSLASH) { 747 t = db_read_token(); 748 if (t != tIDENT) { 749 bad_modifier: 750 db_printf("Bad modifier\n"); 751 db_flush_lex(); 752 return; 753 } 754 if (!strcmp(db_tok_string, "F")) 755 mode = 'F'; 756 else 757 goto bad_modifier; 758 t = db_read_token(); 759 } else 760 mode = 0; 761 762 if (t == tIDENT) 763 db_sifting(db_tok_string, mode); 764 else { 765 db_printf("Bad argument (non-string)\n"); 766 db_flush_lex(); 767 } 768 } 769 770 static void 771 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 772 { 773 register const char *cp = modif; 774 register char c; 775 void (*pr)(const char *, ...); 776 777 pr = db_printf; 778 while ((c = *cp++) != 0) 779 if (c == 'l') 780 pr = printf; 781 782 if (count == -1) 783 count = 65535; 784 785 db_stack_trace_print(addr, have_addr, count, modif, pr); 786 } 787 788 static void 789 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 790 { 791 792 /* 793 * We are leaving DDB, never to return upward. 794 * Clear db_recover so that we can debug faults in functions 795 * called from cpu_reboot. 796 */ 797 db_recover = 0; 798 cpu_reboot(RB_DUMP, NULL); 799 } 800
Indexes created Sat Sep 20 22:09:52 GMT 2025