Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_command.c
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1 /* $OpenBSD: db_command.c,v 1.97 2022/11/05 19:29:45 cheloha Exp $ */ 2 /* $NetBSD: db_command.c,v 1.20 1996/03/30 22:30:05 christos Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 */ 29 30 /* 31 * Command dispatcher. 32 */ 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/proc.h> 36 #include <sys/reboot.h> 37 #include <sys/extent.h> 38 #include <sys/pool.h> 39 #include <sys/msgbuf.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 43 #include <uvm/uvm_extern.h> 44 #include <machine/db_machdep.h> /* type definitions */ 45 46 #include <ddb/db_access.h> 47 #include <ddb/db_lex.h> 48 #include <ddb/db_output.h> 49 #include <ddb/db_command.h> 50 #include <ddb/db_break.h> 51 #include <ddb/db_watch.h> 52 #include <ddb/db_run.h> 53 #include <ddb/db_sym.h> 54 #include <ddb/db_var.h> 55 #include <ddb/db_variables.h> 56 #include <ddb/db_interface.h> 57 #include <ddb/db_extern.h> 58 59 #include <netinet/ip_ipsp.h> 60 #include <uvm/uvm_ddb.h> 61 62 /* 63 * Exported global variables 64 */ 65 int db_cmd_loop_done; 66 label_t *db_recover; 67 68 /* 69 * if 'ed' style: 'dot' is set at start of last item printed, 70 * and '+' points to next line. 71 * Otherwise: 'dot' points to next item, '..' points to last. 72 */ 73 int db_ed_style = 1; 74 75 vaddr_t db_dot; /* current location */ 76 vaddr_t db_last_addr; /* last explicit address typed */ 77 vaddr_t db_prev; /* last address examined 78 or written */ 79 vaddr_t db_next; /* next address to be examined 80 or written */ 81 82 int db_cmd_search(char *, const struct db_command *, 83 const struct db_command **); 84 void db_cmd_list(const struct db_command *); 85 void db_ctf_pprint_cmd(db_expr_t, int, db_expr_t,char *); 86 void db_map_print_cmd(db_expr_t, int, db_expr_t, char *); 87 void db_buf_print_cmd(db_expr_t, int, db_expr_t, char *); 88 void db_malloc_print_cmd(db_expr_t, int, db_expr_t, char *); 89 void db_mbuf_print_cmd(db_expr_t, int, db_expr_t, char *); 90 void db_mount_print_cmd(db_expr_t, int, db_expr_t, char *); 91 void db_show_all_mounts(db_expr_t, int, db_expr_t, char *); 92 void db_show_all_vnodes(db_expr_t, int, db_expr_t, char *); 93 void db_show_all_bufs(db_expr_t, int, db_expr_t, char *); 94 void db_show_all_tdbs(db_expr_t, int, db_expr_t, char *); 95 void db_object_print_cmd(db_expr_t, int, db_expr_t, char *); 96 void db_page_print_cmd(db_expr_t, int, db_expr_t, char *); 97 void db_extent_print_cmd(db_expr_t, int, db_expr_t, char *); 98 void db_pool_print_cmd(db_expr_t, int, db_expr_t, char *); 99 void db_proc_print_cmd(db_expr_t, int, db_expr_t, char *); 100 void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, char *); 101 void db_tdb_print_cmd(db_expr_t, int, db_expr_t, char *); 102 void db_vnode_print_cmd(db_expr_t, int, db_expr_t, char *); 103 void db_nfsreq_print_cmd(db_expr_t, int, db_expr_t, char *); 104 void db_nfsnode_print_cmd(db_expr_t, int, db_expr_t, char *); 105 void db_swap_print_cmd(db_expr_t, int, db_expr_t, char *); 106 void db_help_cmd(db_expr_t, int, db_expr_t, char *); 107 void db_fncall(db_expr_t, int, db_expr_t, char *); 108 void db_boot_sync_cmd(db_expr_t, int, db_expr_t, char *); 109 void db_boot_crash_cmd(db_expr_t, int, db_expr_t, char *); 110 void db_boot_dump_cmd(db_expr_t, int, db_expr_t, char *); 111 void db_boot_halt_cmd(db_expr_t, int, db_expr_t, char *); 112 void db_boot_reboot_cmd(db_expr_t, int, db_expr_t, char *); 113 void db_boot_poweroff_cmd(db_expr_t, int, db_expr_t, char *); 114 void db_stack_trace_cmd(db_expr_t, int, db_expr_t, char *); 115 void db_dmesg_cmd(db_expr_t, int, db_expr_t, char *); 116 void db_show_panic_cmd(db_expr_t, int, db_expr_t, char *); 117 void db_bcstats_print_cmd(db_expr_t, int, db_expr_t, char *); 118 void db_struct_offset_cmd(db_expr_t, int, db_expr_t, char *); 119 void db_ctf_show_struct(db_expr_t, int, db_expr_t, char *); 120 void db_show_regs(db_expr_t, int, db_expr_t, char *); 121 void db_write_cmd(db_expr_t, int, db_expr_t, char *); 122 void db_witness_display(db_expr_t, int, db_expr_t, char *); 123 void db_witness_list(db_expr_t, int, db_expr_t, char *); 124 void db_witness_list_all(db_expr_t, int, db_expr_t, char *); 125 126 127 /* 128 * Utility routine - discard tokens through end-of-line. 129 */ 130 void 131 db_skip_to_eol(void) 132 { 133 int t; 134 do { 135 t = db_read_token(); 136 } while (t != tEOL); 137 } 138 139 /* 140 * Results of command search. 141 */ 142 #define CMD_UNIQUE 0 143 #define CMD_FOUND 1 144 #define CMD_NONE 2 145 #define CMD_AMBIGUOUS 3 146 147 /* 148 * Search for command prefix. 149 */ 150 int 151 db_cmd_search(char *name, const struct db_command *table, 152 const struct db_command **cmdp) 153 { 154 const struct db_command *cmd; 155 int result = CMD_NONE; 156 157 for (cmd = table; cmd->name != 0; cmd++) { 158 char *lp = name, *rp = cmd->name; 159 int c; 160 161 while ((c = *lp) == *rp) { 162 if (c == 0) { 163 /* complete match */ 164 *cmdp = cmd; 165 return (CMD_UNIQUE); 166 } 167 lp++; 168 rp++; 169 } 170 if (c == 0) { 171 /* end of name, not end of command - partial match */ 172 if (result == CMD_FOUND) { 173 result = CMD_AMBIGUOUS; 174 /* but keep looking for a full match - 175 this lets us match single letters */ 176 } else { 177 *cmdp = cmd; 178 result = CMD_FOUND; 179 } 180 } 181 } 182 return (result); 183 } 184 185 void 186 db_cmd_list(const struct db_command *table) 187 { 188 const struct db_command *cmd; 189 190 for (cmd = table; cmd->name != 0; cmd++) { 191 db_printf("%-12s", cmd->name); 192 db_end_line(12); 193 } 194 } 195 196 void 197 db_command(const struct db_command **last_cmdp, 198 const struct db_command *cmd_table) 199 { 200 const struct db_command *cmd; 201 char modif[TOK_STRING_SIZE]; 202 db_expr_t addr, count; 203 int t, result, have_addr = 0; 204 205 t = db_read_token(); 206 if (t == tEOL) { 207 /* empty line repeats last command, at 'next' */ 208 cmd = *last_cmdp; 209 addr = (db_expr_t)db_next; 210 have_addr = 0; 211 count = 1; 212 modif[0] = '\0'; 213 } else if (t == tEXCL) { 214 db_fncall(0, 0, 0, NULL); 215 return; 216 } else if (t != tIDENT) { 217 db_printf("?\n"); 218 db_flush_lex(); 219 return; 220 } else { 221 /* Search for command */ 222 while (cmd_table) { 223 result = db_cmd_search(db_tok_string, 224 cmd_table, &cmd); 225 switch (result) { 226 case CMD_NONE: 227 db_printf("No such command\n"); 228 db_flush_lex(); 229 return; 230 case CMD_AMBIGUOUS: 231 db_printf("Ambiguous\n"); 232 db_flush_lex(); 233 return; 234 default: 235 break; 236 } 237 if ((cmd_table = cmd->more) != 0) { 238 t = db_read_token(); 239 if (t != tIDENT) { 240 db_cmd_list(cmd_table); 241 db_flush_lex(); 242 return; 243 } 244 } 245 } 246 247 if ((cmd->flag & CS_OWN) == 0) { 248 /* 249 * Standard syntax: 250 * command [/modifier] [addr] [,count] 251 */ 252 t = db_read_token(); 253 if (t == tSLASH) { 254 t = db_read_token(); 255 if (t != tIDENT) { 256 db_printf("Bad modifier\n"); 257 db_flush_lex(); 258 return; 259 } 260 db_strlcpy(modif, db_tok_string, sizeof(modif)); 261 } else { 262 db_unread_token(t); 263 modif[0] = '\0'; 264 } 265 266 if (db_expression(&addr)) { 267 db_dot = (vaddr_t) addr; 268 db_last_addr = db_dot; 269 have_addr = 1; 270 } else { 271 addr = (db_expr_t) db_dot; 272 have_addr = 0; 273 } 274 t = db_read_token(); 275 if (t == tCOMMA) { 276 if (!db_expression(&count)) { 277 db_printf("Count missing\n"); 278 db_flush_lex(); 279 return; 280 } 281 } else { 282 db_unread_token(t); 283 count = -1; 284 } 285 if ((cmd->flag & CS_MORE) == 0) 286 db_skip_to_eol(); 287 } 288 } 289 *last_cmdp = cmd; 290 if (cmd != 0) { 291 /* Execute the command. */ 292 (*cmd->fcn)(addr, have_addr, count, modif); 293 294 if (cmd->flag & CS_SET_DOT) { 295 /* 296 * If command changes dot, set dot to 297 * previous address displayed (if 'ed' style). 298 */ 299 if (db_ed_style) 300 db_dot = db_prev; 301 else 302 db_dot = db_next; 303 } 304 } else { 305 /* 306 * If command does not change dot, 307 * set 'next' location to be the same. 308 */ 309 db_next = db_dot; 310 } 311 } 312 313 /*ARGSUSED*/ 314 void 315 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 316 { 317 int full = 0; 318 319 if (modif[0] == 'f') 320 full = 1; 321 322 vfs_buf_print((void *) addr, full, db_printf); 323 } 324 325 /*ARGSUSED*/ 326 void 327 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 328 { 329 int full = 0; 330 331 if (modif[0] == 'f') 332 full = 1; 333 334 uvm_map_printit((struct vm_map *) addr, full, db_printf); 335 } 336 337 /*ARGSUSED*/ 338 void 339 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 340 { 341 malloc_printit(db_printf); 342 } 343 344 /*ARGSUSED*/ 345 void 346 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 347 { 348 m_print((void *)addr, db_printf); 349 } 350 351 /*ARGSUSED*/ 352 void 353 db_socket_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 354 { 355 so_print((void *)addr, db_printf); 356 } 357 358 /*ARGSUSED*/ 359 void 360 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 361 { 362 int full = 0; 363 364 if (modif[0] == 'f') 365 full = 1; 366 367 vfs_mount_print((struct mount *) addr, full, db_printf); 368 } 369 370 void 371 db_show_all_mounts(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 372 { 373 int full = 0; 374 struct mount *mp; 375 376 if (modif[0] == 'f') 377 full = 1; 378 379 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 380 db_printf("mountpoint %p\n", mp); 381 vfs_mount_print(mp, full, db_printf); 382 } 383 } 384 385 extern struct pool vnode_pool; 386 void 387 db_show_all_vnodes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 388 { 389 int full = 0; 390 391 if (modif[0] == 'f') 392 full = 1; 393 394 pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print); 395 } 396 397 extern struct pool bufpool; 398 void 399 db_show_all_bufs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 400 { 401 int full = 0; 402 403 if (modif[0] == 'f') 404 full = 1; 405 406 pool_walk(&bufpool, full, db_printf, vfs_buf_print); 407 } 408 409 #ifdef IPSEC 410 void 411 db_show_all_tdbs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 412 { 413 int full = 0; 414 415 if (modif[0] == 'f') 416 full = 1; 417 418 pool_walk(&tdb_pool, full, db_printf, tdb_printit); 419 } 420 #endif 421 422 void 423 db_show_all_routes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 424 { 425 u_int rtableid = 0; 426 427 if (have_addr) 428 rtableid = addr; 429 if (count == -1) 430 count = 1; 431 432 while (count--) { 433 if (modif[0] != 'I') 434 db_show_rtable(AF_INET, rtableid); 435 if (modif[0] != 'i') 436 db_show_rtable(AF_INET6, rtableid); 437 rtableid++; 438 } 439 } 440 441 void 442 db_show_route(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 443 { 444 db_show_rtentry((void *)addr, NULL, -1); 445 } 446 447 /*ARGSUSED*/ 448 void 449 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 450 { 451 int full = 0; 452 453 if (modif[0] == 'f') 454 full = 1; 455 456 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 457 } 458 459 /*ARGSUSED*/ 460 void 461 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 462 { 463 int full = 0; 464 465 if (modif[0] == 'f') 466 full = 1; 467 468 uvm_page_printit((struct vm_page *) addr, full, db_printf); 469 } 470 471 /*ARGSUSED*/ 472 void 473 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 474 { 475 int full = 0; 476 477 if (modif[0] == 'f') 478 full = 1; 479 480 vfs_vnode_print((void *)addr, full, db_printf); 481 } 482 483 #ifdef NFSCLIENT 484 /*ARGSUSED*/ 485 void 486 db_nfsreq_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 487 char *modif) 488 { 489 int full = 0; 490 491 if (modif[0] == 'f') 492 full = 1; 493 494 nfs_request_print((void *)addr, full, db_printf); 495 } 496 497 /*ARGSUSED*/ 498 void 499 db_nfsnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 500 char *modif) 501 { 502 int full = 0; 503 504 if (modif[0] == 'f') 505 full = 1; 506 507 nfs_node_print((void *)addr, full, db_printf); 508 } 509 #endif 510 511 /*ARGSUSED*/ 512 void 513 db_swap_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 514 char *modif) 515 { 516 swap_print_all(db_printf); 517 } 518 519 /*ARGSUSED*/ 520 void 521 db_show_panic_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 522 { 523 struct cpu_info *ci; 524 char *prefix; 525 CPU_INFO_ITERATOR cii; 526 int panicked = 0; 527 528 CPU_INFO_FOREACH(cii, ci) { 529 if (ci->ci_panicbuf[0] != '\0') { 530 prefix = (panicstr == ci->ci_panicbuf) ? "*" : " "; 531 db_printf("%scpu%d: %s\n", 532 prefix, CPU_INFO_UNIT(ci), ci->ci_panicbuf); 533 panicked = 1; 534 } 535 } 536 if (!panicked) 537 db_printf("the kernel did not panic\n"); /* yet */ 538 } 539 540 /*ARGSUSED*/ 541 void 542 db_extent_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 543 { 544 extent_print_all(); 545 } 546 547 /*ARGSUSED*/ 548 void 549 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 550 { 551 pool_printit((struct pool *)addr, modif, db_printf); 552 } 553 554 /*ARGSUSED*/ 555 void 556 db_proc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 557 { 558 if (!have_addr) 559 addr = (db_expr_t)curproc; 560 561 proc_printit((struct proc *)addr, modif, db_printf); 562 } 563 564 #ifdef IPSEC 565 void 566 db_tdb_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 567 { 568 int full = 0; 569 570 if (modif[0] == 'f') 571 full = 1; 572 573 tdb_printit((void *)addr, full, db_printf); 574 } 575 #endif 576 577 /*ARGSUSED*/ 578 void 579 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 580 { 581 uvmexp_print(db_printf); 582 } 583 584 void bcstats_print(int (*)(const char *, ...)); 585 586 /*ARGSUSED*/ 587 void 588 db_bcstats_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 589 { 590 bcstats_print(db_printf); 591 } 592 593 /* 594 * 'show' commands 595 */ 596 597 const struct db_command db_show_all_cmds[] = { 598 { "procs", db_show_all_procs, 0, NULL }, 599 { "callout", db_show_callout, 0, NULL }, 600 #ifdef __HAVE_CLOCKINTR 601 { "clockintr", db_show_all_clockintr, 0, NULL }, 602 #endif 603 { "pools", db_show_all_pools, 0, NULL }, 604 { "mounts", db_show_all_mounts, 0, NULL }, 605 { "vnodes", db_show_all_vnodes, 0, NULL }, 606 { "bufs", db_show_all_bufs, 0, NULL }, 607 { "routes", db_show_all_routes, 0, NULL }, 608 #ifdef NFSCLIENT 609 { "nfsreqs", db_show_all_nfsreqs, 0, NULL }, 610 { "nfsnodes", db_show_all_nfsnodes, 0, NULL }, 611 #endif 612 #ifdef IPSEC 613 { "tdbs", db_show_all_tdbs, 0, NULL }, 614 #endif 615 #ifdef WITNESS 616 { "locks", db_witness_list_all, 0, NULL }, 617 #endif 618 { NULL, NULL, 0, NULL } 619 }; 620 621 const struct db_command db_show_cmds[] = { 622 { "all", NULL, 0, db_show_all_cmds }, 623 { "bcstats", db_bcstats_print_cmd, 0, NULL }, 624 { "breaks", db_listbreak_cmd, 0, NULL }, 625 { "buf", db_buf_print_cmd, 0, NULL }, 626 { "extents", db_extent_print_cmd, 0, NULL }, 627 #ifdef WITNESS 628 { "locks", db_witness_list, 0, NULL }, 629 #endif 630 { "malloc", db_malloc_print_cmd, 0, NULL }, 631 { "map", db_map_print_cmd, 0, NULL }, 632 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 633 { "mount", db_mount_print_cmd, 0, NULL }, 634 #ifdef NFSCLIENT 635 { "nfsreq", db_nfsreq_print_cmd, 0, NULL }, 636 { "nfsnode", db_nfsnode_print_cmd, 0, NULL }, 637 #endif 638 { "object", db_object_print_cmd, 0, NULL }, 639 { "page", db_page_print_cmd, 0, NULL }, 640 { "panic", db_show_panic_cmd, 0, NULL }, 641 { "pool", db_pool_print_cmd, 0, NULL }, 642 { "proc", db_proc_print_cmd, 0, NULL }, 643 { "registers", db_show_regs, 0, NULL }, 644 { "route", db_show_route, 0, NULL }, 645 { "socket", db_socket_print_cmd, 0, NULL }, 646 { "struct", db_ctf_show_struct, CS_OWN, NULL }, 647 { "swap", db_swap_print_cmd, 0, NULL }, 648 #ifdef IPSEC 649 { "tdb", db_tdb_print_cmd, 0, NULL }, 650 #endif 651 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 652 { "vnode", db_vnode_print_cmd, 0, NULL }, 653 { "watches", db_listwatch_cmd, 0, NULL }, 654 #ifdef WITNESS 655 { "witness", db_witness_display, 0, NULL }, 656 #endif 657 { NULL, NULL, 0, NULL } 658 }; 659 660 const struct db_command db_boot_cmds[] = { 661 { "sync", db_boot_sync_cmd, 0, 0 }, 662 { "crash", db_boot_crash_cmd, 0, 0 }, 663 { "dump", db_boot_dump_cmd, 0, 0 }, 664 { "halt", db_boot_halt_cmd, 0, 0 }, 665 { "reboot", db_boot_reboot_cmd, 0, 0 }, 666 { "poweroff", db_boot_poweroff_cmd, 0, 0 }, 667 { NULL, } 668 }; 669 670 const struct db_command db_command_table[] = { 671 #ifdef DB_MACHINE_COMMANDS 672 /* this must be the first entry, if it exists */ 673 { "machine", NULL, 0, db_machine_command_table }, 674 #endif 675 { "kill", db_kill_cmd, 0, NULL }, 676 { "print", db_print_cmd, 0, NULL }, 677 { "p", db_print_cmd, 0, NULL }, 678 { "pprint", db_ctf_pprint_cmd, CS_OWN, NULL }, 679 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 680 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 681 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 682 { "set", db_set_cmd, CS_OWN, NULL }, 683 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 684 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 685 { "delete", db_delete_cmd, 0, NULL }, 686 { "d", db_delete_cmd, 0, NULL }, 687 { "break", db_breakpoint_cmd, 0, NULL }, 688 { "dwatch", db_deletewatch_cmd, 0, NULL }, 689 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 690 { "step", db_single_step_cmd, 0, NULL }, 691 { "s", db_single_step_cmd, 0, NULL }, 692 { "continue", db_continue_cmd, 0, NULL }, 693 { "c", db_continue_cmd, 0, NULL }, 694 { "until", db_trace_until_call_cmd,0, NULL }, 695 { "next", db_trace_until_matching_cmd,0, NULL }, 696 { "match", db_trace_until_matching_cmd,0, NULL }, 697 { "trace", db_stack_trace_cmd, 0, NULL }, 698 { "bt", db_stack_trace_cmd, 0, NULL }, 699 { "call", db_fncall, CS_OWN, NULL }, 700 { "ps", db_show_all_procs, 0, NULL }, 701 { "callout", db_show_callout, 0, NULL }, 702 { "reboot", db_boot_reboot_cmd, 0, NULL }, 703 { "show", NULL, 0, db_show_cmds }, 704 { "boot", NULL, 0, db_boot_cmds }, 705 { "help", db_help_cmd, 0, NULL }, 706 { "hangman", db_hangman, 0, NULL }, 707 { "dmesg", db_dmesg_cmd, 0, NULL }, 708 { NULL, NULL, 0, NULL } 709 }; 710 711 const struct db_command *db_last_command = NULL; 712 713 void 714 db_help_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 715 { 716 db_cmd_list(db_command_table); 717 } 718 719 void 720 db_command_loop(void) 721 { 722 label_t db_jmpbuf; 723 label_t *savejmp; 724 extern int db_output_line; 725 726 /* 727 * Initialize 'prev' and 'next' to dot. 728 */ 729 db_prev = db_dot; 730 db_next = db_dot; 731 732 db_cmd_loop_done = 0; 733 734 savejmp = db_recover; 735 db_recover = &db_jmpbuf; 736 (void) setjmp(&db_jmpbuf); 737 738 while (!db_cmd_loop_done) { 739 740 if (db_print_position() != 0) 741 db_printf("\n"); 742 db_output_line = 0; 743 744 #ifdef MULTIPROCESSOR 745 db_printf("ddb{%d}> ", CPU_INFO_UNIT(curcpu())); 746 #else 747 db_printf("ddb> "); 748 #endif 749 (void) db_read_line(); 750 751 db_command(&db_last_command, db_command_table); 752 } 753 754 db_recover = savejmp; 755 } 756 757 void 758 db_error(char *s) 759 { 760 if (s) 761 db_printf("%s", s); 762 db_flush_lex(); 763 if (db_recover != NULL) 764 longjmp(db_recover); 765 } 766 767 768 /* 769 * Call random function: 770 * !expr(arg,arg,arg) 771 */ 772 /*ARGSUSED*/ 773 void 774 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 775 { 776 db_expr_t fn_addr; 777 #define MAXARGS 11 778 db_expr_t args[MAXARGS]; 779 int nargs = 0; 780 db_expr_t retval; 781 db_expr_t (*func)(db_expr_t, ...); 782 int t; 783 char tmpfmt[28]; 784 785 if (!db_expression(&fn_addr)) { 786 db_printf("Bad function\n"); 787 db_flush_lex(); 788 return; 789 } 790 func = (db_expr_t (*)(db_expr_t, ...)) fn_addr; 791 792 t = db_read_token(); 793 if (t == tLPAREN) { 794 if (db_expression(&args[0])) { 795 nargs++; 796 while ((t = db_read_token()) == tCOMMA) { 797 if (nargs == MAXARGS) { 798 db_printf("Too many arguments\n"); 799 db_flush_lex(); 800 return; 801 } 802 if (!db_expression(&args[nargs])) { 803 db_printf("Argument missing\n"); 804 db_flush_lex(); 805 return; 806 } 807 nargs++; 808 } 809 db_unread_token(t); 810 } 811 if (db_read_token() != tRPAREN) { 812 db_printf("?\n"); 813 db_flush_lex(); 814 return; 815 } 816 } 817 db_skip_to_eol(); 818 819 while (nargs < MAXARGS) 820 args[nargs++] = 0; 821 822 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 823 args[5], args[6], args[7], args[8], args[9]); 824 db_printf("%s\n", db_format(tmpfmt, sizeof tmpfmt, retval, 825 DB_FORMAT_N, 1, 0)); 826 } 827 828 void 829 db_reboot(int howto) 830 { 831 spl0(); 832 if (!curproc) 833 curproc = &proc0; 834 reboot(howto); 835 } 836 837 void 838 db_boot_sync_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 839 { 840 db_reboot(RB_AUTOBOOT | RB_TIMEBAD | RB_USERREQ); 841 } 842 843 void 844 db_boot_crash_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 845 { 846 db_reboot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD | RB_USERREQ); 847 } 848 849 void 850 db_boot_dump_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 851 { 852 db_reboot(RB_DUMP | RB_TIMEBAD | RB_USERREQ); 853 } 854 855 void 856 db_boot_halt_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 857 { 858 db_reboot(RB_NOSYNC | RB_HALT | RB_TIMEBAD | RB_USERREQ); 859 } 860 861 void 862 db_boot_reboot_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 863 { 864 boot(RB_RESET | RB_AUTOBOOT | RB_NOSYNC | RB_TIMEBAD | RB_USERREQ); 865 } 866 867 void 868 db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 869 { 870 db_reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ); 871 } 872 873 void 874 db_dmesg_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 875 { 876 int i, off; 877 char *p; 878 879 if (!msgbufp || msgbufp->msg_magic != MSG_MAGIC) 880 return; 881 off = msgbufp->msg_bufx; 882 if (off > msgbufp->msg_bufs) 883 off = 0; 884 for (i = 0, p = msgbufp->msg_bufc + off; 885 i < msgbufp->msg_bufs; i++, p++) { 886 if (p >= msgbufp->msg_bufc + msgbufp->msg_bufs) 887 p = msgbufp->msg_bufc; 888 if (*p != '\0') 889 db_putchar(*p); 890 } 891 db_putchar('\n'); 892 } 893 894 void 895 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 896 { 897 db_stack_trace_print(addr, have_addr, count, modif, db_printf); 898 } 899 900 void 901 db_show_regs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 902 { 903 struct db_variable *regp; 904 db_expr_t value, offset; 905 char * name; 906 char tmpfmt[28]; 907 908 for (regp = db_regs; regp < db_eregs; regp++) { 909 db_read_variable(regp, &value); 910 db_printf("%-12s%s", regp->name, 911 db_format(tmpfmt, sizeof tmpfmt, 912 (long)value, DB_FORMAT_N, 1, sizeof(long) * 3)); 913 db_find_xtrn_sym_and_offset((vaddr_t)value, &name, &offset); 914 if (name != 0 && offset <= db_maxoff && offset != value) { 915 db_printf("\t%s", name); 916 if (offset != 0) 917 db_printf("+%s", 918 db_format(tmpfmt, sizeof tmpfmt, 919 (long)offset, DB_FORMAT_R, 1, 0)); 920 } 921 db_printf("\n"); 922 } 923 db_print_loc_and_inst(PC_REGS(&ddb_regs)); 924 } 925 926 /* 927 * Write to file. 928 */ 929 /*ARGSUSED*/ 930 void 931 db_write_cmd(db_expr_t address, int have_addr, db_expr_t count, char *modif) 932 { 933 vaddr_t addr; 934 db_expr_t old_value; 935 db_expr_t new_value; 936 int size, wrote_one = 0; 937 char tmpfmt[28]; 938 939 addr = (vaddr_t) address; 940 941 switch (modif[0]) { 942 case 'b': 943 size = 1; 944 break; 945 case 'h': 946 size = 2; 947 break; 948 case 'l': 949 case '\0': 950 size = 4; 951 break; 952 #ifdef __LP64__ 953 case 'q': 954 size = 8; 955 break; 956 #endif 957 default: 958 size = -1; 959 db_error("Unknown size\n"); 960 /*NOTREACHED*/ 961 } 962 963 while (db_expression(&new_value)) { 964 old_value = db_get_value(addr, size, 0); 965 db_printsym(addr, DB_STGY_ANY, db_printf); 966 db_printf("\t\t%s\t", db_format(tmpfmt, sizeof tmpfmt, 967 old_value, DB_FORMAT_N, 0, 8)); 968 db_printf("=\t%s\n", db_format(tmpfmt, sizeof tmpfmt, 969 new_value, DB_FORMAT_N, 0, 8)); 970 db_put_value(addr, size, new_value); 971 addr += size; 972 973 wrote_one = 1; 974 } 975 976 if (!wrote_one) { 977 db_error("Nothing written.\n"); 978 /*NOTREACHED*/ 979 } 980 981 db_next = addr; 982 db_prev = addr - size; 983 984 db_skip_to_eol(); 985 }
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