1 /* $OpenBSD: db_command.c,v 1.98 2023/03/08 04:43:07 guenther 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 void 314 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 315 { 316 int full = 0; 317 318 if (modif[0] == 'f') 319 full = 1; 320 321 vfs_buf_print((void *) addr, full, db_printf); 322 } 323 324 void 325 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 326 { 327 int full = 0; 328 329 if (modif[0] == 'f') 330 full = 1; 331 332 uvm_map_printit((struct vm_map *) addr, full, db_printf); 333 } 334 335 void 336 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 337 { 338 malloc_printit(db_printf); 339 } 340 341 void 342 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 343 { 344 m_print((void *)addr, db_printf); 345 } 346 347 void 348 db_socket_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 349 { 350 so_print((void *)addr, db_printf); 351 } 352 353 void 354 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 355 { 356 int full = 0; 357 358 if (modif[0] == 'f') 359 full = 1; 360 361 vfs_mount_print((struct mount *) addr, full, db_printf); 362 } 363 364 void 365 db_show_all_mounts(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 366 { 367 int full = 0; 368 struct mount *mp; 369 370 if (modif[0] == 'f') 371 full = 1; 372 373 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 374 db_printf("mountpoint %p\n", mp); 375 vfs_mount_print(mp, full, db_printf); 376 } 377 } 378 379 extern struct pool vnode_pool; 380 void 381 db_show_all_vnodes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 382 { 383 int full = 0; 384 385 if (modif[0] == 'f') 386 full = 1; 387 388 pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print); 389 } 390 391 extern struct pool bufpool; 392 void 393 db_show_all_bufs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 394 { 395 int full = 0; 396 397 if (modif[0] == 'f') 398 full = 1; 399 400 pool_walk(&bufpool, full, db_printf, vfs_buf_print); 401 } 402 403 #ifdef IPSEC 404 void 405 db_show_all_tdbs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 406 { 407 int full = 0; 408 409 if (modif[0] == 'f') 410 full = 1; 411 412 pool_walk(&tdb_pool, full, db_printf, tdb_printit); 413 } 414 #endif 415 416 void 417 db_show_all_routes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 418 { 419 u_int rtableid = 0; 420 421 if (have_addr) 422 rtableid = addr; 423 if (count == -1) 424 count = 1; 425 426 while (count--) { 427 if (modif[0] != 'I') 428 db_show_rtable(AF_INET, rtableid); 429 if (modif[0] != 'i') 430 db_show_rtable(AF_INET6, rtableid); 431 rtableid++; 432 } 433 } 434 435 void 436 db_show_route(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 437 { 438 db_show_rtentry((void *)addr, NULL, -1); 439 } 440 441 void 442 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 443 { 444 int full = 0; 445 446 if (modif[0] == 'f') 447 full = 1; 448 449 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 450 } 451 452 void 453 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 454 { 455 int full = 0; 456 457 if (modif[0] == 'f') 458 full = 1; 459 460 uvm_page_printit((struct vm_page *) addr, full, db_printf); 461 } 462 463 void 464 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 465 { 466 int full = 0; 467 468 if (modif[0] == 'f') 469 full = 1; 470 471 vfs_vnode_print((void *)addr, full, db_printf); 472 } 473 474 #ifdef NFSCLIENT 475 void 476 db_nfsreq_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 477 char *modif) 478 { 479 int full = 0; 480 481 if (modif[0] == 'f') 482 full = 1; 483 484 nfs_request_print((void *)addr, full, db_printf); 485 } 486 487 void 488 db_nfsnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 489 char *modif) 490 { 491 int full = 0; 492 493 if (modif[0] == 'f') 494 full = 1; 495 496 nfs_node_print((void *)addr, full, db_printf); 497 } 498 #endif 499 500 void 501 db_swap_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 502 char *modif) 503 { 504 swap_print_all(db_printf); 505 } 506 507 void 508 db_show_panic_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 509 { 510 struct cpu_info *ci; 511 char *prefix; 512 CPU_INFO_ITERATOR cii; 513 int panicked = 0; 514 515 CPU_INFO_FOREACH(cii, ci) { 516 if (ci->ci_panicbuf[0] != '\0') { 517 prefix = (panicstr == ci->ci_panicbuf) ? "*" : " "; 518 db_printf("%scpu%d: %s\n", 519 prefix, CPU_INFO_UNIT(ci), ci->ci_panicbuf); 520 panicked = 1; 521 } 522 } 523 if (!panicked) 524 db_printf("the kernel did not panic\n"); /* yet */ 525 } 526 527 void 528 db_extent_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 529 { 530 extent_print_all(); 531 } 532 533 void 534 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 535 { 536 pool_printit((struct pool *)addr, modif, db_printf); 537 } 538 539 void 540 db_proc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 541 { 542 if (!have_addr) 543 addr = (db_expr_t)curproc; 544 545 proc_printit((struct proc *)addr, modif, db_printf); 546 } 547 548 #ifdef IPSEC 549 void 550 db_tdb_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 551 { 552 int full = 0; 553 554 if (modif[0] == 'f') 555 full = 1; 556 557 tdb_printit((void *)addr, full, db_printf); 558 } 559 #endif 560 561 void 562 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 563 { 564 uvmexp_print(db_printf); 565 } 566 567 void bcstats_print(int (*)(const char *, ...)); 568 569 void 570 db_bcstats_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 571 { 572 bcstats_print(db_printf); 573 } 574 575 /* 576 * 'show' commands 577 */ 578 579 const struct db_command db_show_all_cmds[] = { 580 { "procs", db_show_all_procs, 0, NULL }, 581 { "callout", db_show_callout, 0, NULL }, 582 #ifdef __HAVE_CLOCKINTR 583 { "clockintr", db_show_all_clockintr, 0, NULL }, 584 #endif 585 { "pools", db_show_all_pools, 0, NULL }, 586 { "mounts", db_show_all_mounts, 0, NULL }, 587 { "vnodes", db_show_all_vnodes, 0, NULL }, 588 { "bufs", db_show_all_bufs, 0, NULL }, 589 { "routes", db_show_all_routes, 0, NULL }, 590 #ifdef NFSCLIENT 591 { "nfsreqs", db_show_all_nfsreqs, 0, NULL }, 592 { "nfsnodes", db_show_all_nfsnodes, 0, NULL }, 593 #endif 594 #ifdef IPSEC 595 { "tdbs", db_show_all_tdbs, 0, NULL }, 596 #endif 597 #ifdef WITNESS 598 { "locks", db_witness_list_all, 0, NULL }, 599 #endif 600 { NULL, NULL, 0, NULL } 601 }; 602 603 const struct db_command db_show_cmds[] = { 604 { "all", NULL, 0, db_show_all_cmds }, 605 { "bcstats", db_bcstats_print_cmd, 0, NULL }, 606 { "breaks", db_listbreak_cmd, 0, NULL }, 607 { "buf", db_buf_print_cmd, 0, NULL }, 608 { "extents", db_extent_print_cmd, 0, NULL }, 609 #ifdef WITNESS 610 { "locks", db_witness_list, 0, NULL }, 611 #endif 612 { "malloc", db_malloc_print_cmd, 0, NULL }, 613 { "map", db_map_print_cmd, 0, NULL }, 614 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 615 { "mount", db_mount_print_cmd, 0, NULL }, 616 #ifdef NFSCLIENT 617 { "nfsreq", db_nfsreq_print_cmd, 0, NULL }, 618 { "nfsnode", db_nfsnode_print_cmd, 0, NULL }, 619 #endif 620 { "object", db_object_print_cmd, 0, NULL }, 621 { "page", db_page_print_cmd, 0, NULL }, 622 { "panic", db_show_panic_cmd, 0, NULL }, 623 { "pool", db_pool_print_cmd, 0, NULL }, 624 { "proc", db_proc_print_cmd, 0, NULL }, 625 { "registers", db_show_regs, 0, NULL }, 626 { "route", db_show_route, 0, NULL }, 627 { "socket", db_socket_print_cmd, 0, NULL }, 628 { "struct", db_ctf_show_struct, CS_OWN, NULL }, 629 { "swap", db_swap_print_cmd, 0, NULL }, 630 #ifdef IPSEC 631 { "tdb", db_tdb_print_cmd, 0, NULL }, 632 #endif 633 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 634 { "vnode", db_vnode_print_cmd, 0, NULL }, 635 { "watches", db_listwatch_cmd, 0, NULL }, 636 #ifdef WITNESS 637 { "witness", db_witness_display, 0, NULL }, 638 #endif 639 { NULL, NULL, 0, NULL } 640 }; 641 642 const struct db_command db_boot_cmds[] = { 643 { "sync", db_boot_sync_cmd, 0, 0 }, 644 { "crash", db_boot_crash_cmd, 0, 0 }, 645 { "dump", db_boot_dump_cmd, 0, 0 }, 646 { "halt", db_boot_halt_cmd, 0, 0 }, 647 { "reboot", db_boot_reboot_cmd, 0, 0 }, 648 { "poweroff", db_boot_poweroff_cmd, 0, 0 }, 649 { NULL, } 650 }; 651 652 const struct db_command db_command_table[] = { 653 #ifdef DB_MACHINE_COMMANDS 654 /* this must be the first entry, if it exists */ 655 { "machine", NULL, 0, db_machine_command_table }, 656 #endif 657 { "kill", db_kill_cmd, 0, NULL }, 658 { "print", db_print_cmd, 0, NULL }, 659 { "p", db_print_cmd, 0, NULL }, 660 { "pprint", db_ctf_pprint_cmd, CS_OWN, NULL }, 661 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 662 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 663 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 664 { "set", db_set_cmd, CS_OWN, NULL }, 665 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 666 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 667 { "delete", db_delete_cmd, 0, NULL }, 668 { "d", db_delete_cmd, 0, NULL }, 669 { "break", db_breakpoint_cmd, 0, NULL }, 670 { "dwatch", db_deletewatch_cmd, 0, NULL }, 671 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 672 { "step", db_single_step_cmd, 0, NULL }, 673 { "s", db_single_step_cmd, 0, NULL }, 674 { "continue", db_continue_cmd, 0, NULL }, 675 { "c", db_continue_cmd, 0, NULL }, 676 { "until", db_trace_until_call_cmd,0, NULL }, 677 { "next", db_trace_until_matching_cmd,0, NULL }, 678 { "match", db_trace_until_matching_cmd,0, NULL }, 679 { "trace", db_stack_trace_cmd, 0, NULL }, 680 { "bt", db_stack_trace_cmd, 0, NULL }, 681 { "call", db_fncall, CS_OWN, NULL }, 682 { "ps", db_show_all_procs, 0, NULL }, 683 { "callout", db_show_callout, 0, NULL }, 684 { "reboot", db_boot_reboot_cmd, 0, NULL }, 685 { "show", NULL, 0, db_show_cmds }, 686 { "boot", NULL, 0, db_boot_cmds }, 687 { "help", db_help_cmd, 0, NULL }, 688 { "hangman", db_hangman, 0, NULL }, 689 { "dmesg", db_dmesg_cmd, 0, NULL }, 690 { NULL, NULL, 0, NULL } 691 }; 692 693 const struct db_command *db_last_command = NULL; 694 695 void 696 db_help_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 697 { 698 db_cmd_list(db_command_table); 699 } 700 701 void 702 db_command_loop(void) 703 { 704 label_t db_jmpbuf; 705 label_t *savejmp; 706 extern int db_output_line; 707 708 /* 709 * Initialize 'prev' and 'next' to dot. 710 */ 711 db_prev = db_dot; 712 db_next = db_dot; 713 714 db_cmd_loop_done = 0; 715 716 savejmp = db_recover; 717 db_recover = &db_jmpbuf; 718 (void) setjmp(&db_jmpbuf); 719 720 while (!db_cmd_loop_done) { 721 722 if (db_print_position() != 0) 723 db_printf("\n"); 724 db_output_line = 0; 725 726 #ifdef MULTIPROCESSOR 727 db_printf("ddb{%d}> ", CPU_INFO_UNIT(curcpu())); 728 #else 729 db_printf("ddb> "); 730 #endif 731 (void) db_read_line(); 732 733 db_command(&db_last_command, db_command_table); 734 } 735 736 db_recover = savejmp; 737 } 738 739 void 740 db_error(char *s) 741 { 742 if (s) 743 db_printf("%s", s); 744 db_flush_lex(); 745 if (db_recover != NULL) 746 longjmp(db_recover); 747 } 748 749 750 /* 751 * Call random function: 752 * !expr(arg,arg,arg) 753 */ 754 void 755 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 756 { 757 db_expr_t fn_addr; 758 #define MAXARGS 11 759 db_expr_t args[MAXARGS]; 760 int nargs = 0; 761 db_expr_t retval; 762 db_expr_t (*func)(db_expr_t, ...); 763 int t; 764 char tmpfmt[28]; 765 766 if (!db_expression(&fn_addr)) { 767 db_printf("Bad function\n"); 768 db_flush_lex(); 769 return; 770 } 771 func = (db_expr_t (*)(db_expr_t, ...)) fn_addr; 772 773 t = db_read_token(); 774 if (t == tLPAREN) { 775 if (db_expression(&args[0])) { 776 nargs++; 777 while ((t = db_read_token()) == tCOMMA) { 778 if (nargs == MAXARGS) { 779 db_printf("Too many arguments\n"); 780 db_flush_lex(); 781 return; 782 } 783 if (!db_expression(&args[nargs])) { 784 db_printf("Argument missing\n"); 785 db_flush_lex(); 786 return; 787 } 788 nargs++; 789 } 790 db_unread_token(t); 791 } 792 if (db_read_token() != tRPAREN) { 793 db_printf("?\n"); 794 db_flush_lex(); 795 return; 796 } 797 } 798 db_skip_to_eol(); 799 800 while (nargs < MAXARGS) 801 args[nargs++] = 0; 802 803 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 804 args[5], args[6], args[7], args[8], args[9]); 805 db_printf("%s\n", db_format(tmpfmt, sizeof tmpfmt, retval, 806 DB_FORMAT_N, 1, 0)); 807 } 808 809 void 810 db_reboot(int howto) 811 { 812 spl0(); 813 if (!curproc) 814 curproc = &proc0; 815 reboot(howto); 816 } 817 818 void 819 db_boot_sync_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 820 { 821 db_reboot(RB_AUTOBOOT | RB_TIMEBAD | RB_USERREQ); 822 } 823 824 void 825 db_boot_crash_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 826 { 827 db_reboot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD | RB_USERREQ); 828 } 829 830 void 831 db_boot_dump_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 832 { 833 db_reboot(RB_DUMP | RB_TIMEBAD | RB_USERREQ); 834 } 835 836 void 837 db_boot_halt_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 838 { 839 db_reboot(RB_NOSYNC | RB_HALT | RB_TIMEBAD | RB_USERREQ); 840 } 841 842 void 843 db_boot_reboot_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 844 { 845 boot(RB_RESET | RB_AUTOBOOT | RB_NOSYNC | RB_TIMEBAD | RB_USERREQ); 846 } 847 848 void 849 db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 850 { 851 db_reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ); 852 } 853 854 void 855 db_dmesg_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 856 { 857 int i, off; 858 char *p; 859 860 if (!msgbufp || msgbufp->msg_magic != MSG_MAGIC) 861 return; 862 off = msgbufp->msg_bufx; 863 if (off > msgbufp->msg_bufs) 864 off = 0; 865 for (i = 0, p = msgbufp->msg_bufc + off; 866 i < msgbufp->msg_bufs; i++, p++) { 867 if (p >= msgbufp->msg_bufc + msgbufp->msg_bufs) 868 p = msgbufp->msg_bufc; 869 if (*p != '\0') 870 db_putchar(*p); 871 } 872 db_putchar('\n'); 873 } 874 875 void 876 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 877 { 878 db_stack_trace_print(addr, have_addr, count, modif, db_printf); 879 } 880 881 void 882 db_show_regs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 883 { 884 struct db_variable *regp; 885 db_expr_t value, offset; 886 char * name; 887 char tmpfmt[28]; 888 889 for (regp = db_regs; regp < db_eregs; regp++) { 890 db_read_variable(regp, &value); 891 db_printf("%-12s%s", regp->name, 892 db_format(tmpfmt, sizeof tmpfmt, 893 (long)value, DB_FORMAT_N, 1, sizeof(long) * 3)); 894 db_find_xtrn_sym_and_offset((vaddr_t)value, &name, &offset); 895 if (name != 0 && offset <= db_maxoff && offset != value) { 896 db_printf("\t%s", name); 897 if (offset != 0) 898 db_printf("+%s", 899 db_format(tmpfmt, sizeof tmpfmt, 900 (long)offset, DB_FORMAT_R, 1, 0)); 901 } 902 db_printf("\n"); 903 } 904 db_print_loc_and_inst(PC_REGS(&ddb_regs)); 905 } 906 907 /* 908 * Write to file. 909 */ 910 void 911 db_write_cmd(db_expr_t address, int have_addr, db_expr_t count, char *modif) 912 { 913 vaddr_t addr; 914 db_expr_t old_value; 915 db_expr_t new_value; 916 int size, wrote_one = 0; 917 char tmpfmt[28]; 918 919 addr = (vaddr_t) address; 920 921 switch (modif[0]) { 922 case 'b': 923 size = 1; 924 break; 925 case 'h': 926 size = 2; 927 break; 928 case 'l': 929 case '\0': 930 size = 4; 931 break; 932 #ifdef __LP64__ 933 case 'q': 934 size = 8; 935 break; 936 #endif 937 default: 938 size = -1; 939 db_error("Unknown size\n"); 940 /*NOTREACHED*/ 941 } 942 943 while (db_expression(&new_value)) { 944 old_value = db_get_value(addr, size, 0); 945 db_printsym(addr, DB_STGY_ANY, db_printf); 946 db_printf("\t\t%s\t", db_format(tmpfmt, sizeof tmpfmt, 947 old_value, DB_FORMAT_N, 0, 8)); 948 db_printf("=\t%s\n", db_format(tmpfmt, sizeof tmpfmt, 949 new_value, DB_FORMAT_N, 0, 8)); 950 db_put_value(addr, size, new_value); 951 addr += size; 952 953 wrote_one = 1; 954 } 955 956 if (!wrote_one) { 957 db_error("Nothing written.\n"); 958 /*NOTREACHED*/ 959 } 960 961 db_next = addr; 962 db_prev = addr - size; 963 964 db_skip_to_eol(); 965 } 966