1 /* $OpenBSD: db_command.c,v 1.92 2021/11/16 13:53:14 bluhm 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 *, struct db_command *, struct db_command **); 83 void db_cmd_list(struct db_command *); 84 void db_ctf_pprint_cmd(db_expr_t, int, db_expr_t,char *); 85 void db_map_print_cmd(db_expr_t, int, db_expr_t, char *); 86 void db_buf_print_cmd(db_expr_t, int, db_expr_t, char *); 87 void db_malloc_print_cmd(db_expr_t, int, db_expr_t, char *); 88 void db_mbuf_print_cmd(db_expr_t, int, db_expr_t, char *); 89 void db_mount_print_cmd(db_expr_t, int, db_expr_t, char *); 90 void db_show_all_mounts(db_expr_t, int, db_expr_t, char *); 91 void db_show_all_vnodes(db_expr_t, int, db_expr_t, char *); 92 void db_show_all_bufs(db_expr_t, int, db_expr_t, char *); 93 void db_show_all_tdbs(db_expr_t, int, db_expr_t, char *); 94 void db_object_print_cmd(db_expr_t, int, db_expr_t, char *); 95 void db_page_print_cmd(db_expr_t, int, db_expr_t, char *); 96 void db_extent_print_cmd(db_expr_t, int, db_expr_t, char *); 97 void db_pool_print_cmd(db_expr_t, int, db_expr_t, char *); 98 void db_proc_print_cmd(db_expr_t, int, db_expr_t, char *); 99 void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, char *); 100 void db_tdb_print_cmd(db_expr_t, int, db_expr_t, char *); 101 void db_vnode_print_cmd(db_expr_t, int, db_expr_t, char *); 102 void db_nfsreq_print_cmd(db_expr_t, int, db_expr_t, char *); 103 void db_nfsnode_print_cmd(db_expr_t, int, db_expr_t, char *); 104 void db_help_cmd(db_expr_t, int, db_expr_t, char *); 105 void db_fncall(db_expr_t, int, db_expr_t, char *); 106 void db_boot_sync_cmd(db_expr_t, int, db_expr_t, char *); 107 void db_boot_crash_cmd(db_expr_t, int, db_expr_t, char *); 108 void db_boot_dump_cmd(db_expr_t, int, db_expr_t, char *); 109 void db_boot_halt_cmd(db_expr_t, int, db_expr_t, char *); 110 void db_boot_reboot_cmd(db_expr_t, int, db_expr_t, char *); 111 void db_boot_poweroff_cmd(db_expr_t, int, db_expr_t, char *); 112 void db_stack_trace_cmd(db_expr_t, int, db_expr_t, char *); 113 void db_dmesg_cmd(db_expr_t, int, db_expr_t, char *); 114 void db_show_panic_cmd(db_expr_t, int, db_expr_t, char *); 115 void db_bcstats_print_cmd(db_expr_t, int, db_expr_t, char *); 116 void db_struct_offset_cmd(db_expr_t, int, db_expr_t, char *); 117 void db_ctf_show_struct(db_expr_t, int, db_expr_t, char *); 118 void db_show_regs(db_expr_t, int, db_expr_t, char *); 119 void db_write_cmd(db_expr_t, int, db_expr_t, char *); 120 void db_witness_display(db_expr_t, int, db_expr_t, char *); 121 void db_witness_list(db_expr_t, int, db_expr_t, char *); 122 void db_witness_list_all(db_expr_t, int, db_expr_t, char *); 123 124 125 /* 126 * Utility routine - discard tokens through end-of-line. 127 */ 128 void 129 db_skip_to_eol(void) 130 { 131 int t; 132 do { 133 t = db_read_token(); 134 } while (t != tEOL); 135 } 136 137 /* 138 * Results of command search. 139 */ 140 #define CMD_UNIQUE 0 141 #define CMD_FOUND 1 142 #define CMD_NONE 2 143 #define CMD_AMBIGUOUS 3 144 145 /* 146 * Search for command prefix. 147 */ 148 int 149 db_cmd_search(char *name, struct db_command *table, struct db_command **cmdp) 150 { 151 struct db_command *cmd; 152 int result = CMD_NONE; 153 154 for (cmd = table; cmd->name != 0; cmd++) { 155 char *lp = name, *rp = cmd->name; 156 int c; 157 158 while ((c = *lp) == *rp) { 159 if (c == 0) { 160 /* complete match */ 161 *cmdp = cmd; 162 return (CMD_UNIQUE); 163 } 164 lp++; 165 rp++; 166 } 167 if (c == 0) { 168 /* end of name, not end of command - partial match */ 169 if (result == CMD_FOUND) { 170 result = CMD_AMBIGUOUS; 171 /* but keep looking for a full match - 172 this lets us match single letters */ 173 } else { 174 *cmdp = cmd; 175 result = CMD_FOUND; 176 } 177 } 178 } 179 return (result); 180 } 181 182 void 183 db_cmd_list(struct db_command *table) 184 { 185 struct db_command *cmd; 186 187 for (cmd = table; cmd->name != 0; cmd++) { 188 db_printf("%-12s", cmd->name); 189 db_end_line(12); 190 } 191 } 192 193 void 194 db_command(struct db_command **last_cmdp, struct db_command *cmd_table) 195 { 196 struct db_command *cmd; 197 char modif[TOK_STRING_SIZE]; 198 db_expr_t addr, count; 199 int t, result, have_addr = 0; 200 201 t = db_read_token(); 202 if (t == tEOL) { 203 /* empty line repeats last command, at 'next' */ 204 cmd = *last_cmdp; 205 addr = (db_expr_t)db_next; 206 have_addr = 0; 207 count = 1; 208 modif[0] = '\0'; 209 } else if (t == tEXCL) { 210 db_fncall(0, 0, 0, NULL); 211 return; 212 } else if (t != tIDENT) { 213 db_printf("?\n"); 214 db_flush_lex(); 215 return; 216 } else { 217 /* Search for command */ 218 while (cmd_table) { 219 result = db_cmd_search(db_tok_string, 220 cmd_table, &cmd); 221 switch (result) { 222 case CMD_NONE: 223 db_printf("No such command\n"); 224 db_flush_lex(); 225 return; 226 case CMD_AMBIGUOUS: 227 db_printf("Ambiguous\n"); 228 db_flush_lex(); 229 return; 230 default: 231 break; 232 } 233 if ((cmd_table = cmd->more) != 0) { 234 t = db_read_token(); 235 if (t != tIDENT) { 236 db_cmd_list(cmd_table); 237 db_flush_lex(); 238 return; 239 } 240 } 241 } 242 243 if ((cmd->flag & CS_OWN) == 0) { 244 /* 245 * Standard syntax: 246 * command [/modifier] [addr] [,count] 247 */ 248 t = db_read_token(); 249 if (t == tSLASH) { 250 t = db_read_token(); 251 if (t != tIDENT) { 252 db_printf("Bad modifier\n"); 253 db_flush_lex(); 254 return; 255 } 256 db_strlcpy(modif, db_tok_string, sizeof(modif)); 257 } else { 258 db_unread_token(t); 259 modif[0] = '\0'; 260 } 261 262 if (db_expression(&addr)) { 263 db_dot = (vaddr_t) addr; 264 db_last_addr = db_dot; 265 have_addr = 1; 266 } else { 267 addr = (db_expr_t) db_dot; 268 have_addr = 0; 269 } 270 t = db_read_token(); 271 if (t == tCOMMA) { 272 if (!db_expression(&count)) { 273 db_printf("Count missing\n"); 274 db_flush_lex(); 275 return; 276 } 277 } else { 278 db_unread_token(t); 279 count = -1; 280 } 281 if ((cmd->flag & CS_MORE) == 0) 282 db_skip_to_eol(); 283 } 284 } 285 *last_cmdp = cmd; 286 if (cmd != 0) { 287 /* Execute the command. */ 288 (*cmd->fcn)(addr, have_addr, count, modif); 289 290 if (cmd->flag & CS_SET_DOT) { 291 /* 292 * If command changes dot, set dot to 293 * previous address displayed (if 'ed' style). 294 */ 295 if (db_ed_style) 296 db_dot = db_prev; 297 else 298 db_dot = db_next; 299 } 300 } else { 301 /* 302 * If command does not change dot, 303 * set 'next' location to be the same. 304 */ 305 db_next = db_dot; 306 } 307 } 308 309 /*ARGSUSED*/ 310 void 311 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 312 { 313 int full = 0; 314 315 if (modif[0] == 'f') 316 full = 1; 317 318 vfs_buf_print((void *) addr, full, db_printf); 319 } 320 321 /*ARGSUSED*/ 322 void 323 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 324 { 325 int full = 0; 326 327 if (modif[0] == 'f') 328 full = 1; 329 330 uvm_map_printit((struct vm_map *) addr, full, db_printf); 331 } 332 333 /*ARGSUSED*/ 334 void 335 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 336 { 337 malloc_printit(db_printf); 338 } 339 340 /*ARGSUSED*/ 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 /*ARGSUSED*/ 348 void 349 db_socket_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 350 { 351 so_print((void *)addr, db_printf); 352 } 353 354 /*ARGSUSED*/ 355 void 356 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 357 { 358 int full = 0; 359 360 if (modif[0] == 'f') 361 full = 1; 362 363 vfs_mount_print((struct mount *) addr, full, db_printf); 364 } 365 366 void 367 db_show_all_mounts(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 368 { 369 int full = 0; 370 struct mount *mp; 371 372 if (modif[0] == 'f') 373 full = 1; 374 375 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 376 db_printf("mountpoint %p\n", mp); 377 vfs_mount_print(mp, full, db_printf); 378 } 379 } 380 381 extern struct pool vnode_pool; 382 void 383 db_show_all_vnodes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 384 { 385 int full = 0; 386 387 if (modif[0] == 'f') 388 full = 1; 389 390 pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print); 391 } 392 393 extern struct pool bufpool; 394 void 395 db_show_all_bufs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 396 { 397 int full = 0; 398 399 if (modif[0] == 'f') 400 full = 1; 401 402 pool_walk(&bufpool, full, db_printf, vfs_buf_print); 403 } 404 405 #ifdef IPSEC 406 void 407 db_show_all_tdbs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 408 { 409 int full = 0; 410 411 if (modif[0] == 'f') 412 full = 1; 413 414 pool_walk(&tdb_pool, full, db_printf, tdb_printit); 415 } 416 #endif 417 418 /*ARGSUSED*/ 419 void 420 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 421 { 422 int full = 0; 423 424 if (modif[0] == 'f') 425 full = 1; 426 427 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 428 } 429 430 /*ARGSUSED*/ 431 void 432 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 433 { 434 int full = 0; 435 436 if (modif[0] == 'f') 437 full = 1; 438 439 uvm_page_printit((struct vm_page *) addr, full, db_printf); 440 } 441 442 /*ARGSUSED*/ 443 void 444 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 445 { 446 int full = 0; 447 448 if (modif[0] == 'f') 449 full = 1; 450 451 vfs_vnode_print((void *)addr, full, db_printf); 452 } 453 454 #ifdef NFSCLIENT 455 /*ARGSUSED*/ 456 void 457 db_nfsreq_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 458 char *modif) 459 { 460 int full = 0; 461 462 if (modif[0] == 'f') 463 full = 1; 464 465 nfs_request_print((void *)addr, full, db_printf); 466 } 467 468 /*ARGSUSED*/ 469 void 470 db_nfsnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 471 char *modif) 472 { 473 int full = 0; 474 475 if (modif[0] == 'f') 476 full = 1; 477 478 nfs_node_print((void *)addr, full, db_printf); 479 } 480 #endif 481 482 483 /*ARGSUSED*/ 484 void 485 db_show_panic_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 486 { 487 struct cpu_info *ci; 488 char *prefix; 489 CPU_INFO_ITERATOR cii; 490 int panicked = 0; 491 492 CPU_INFO_FOREACH(cii, ci) { 493 if (ci->ci_panicbuf[0] != '\0') { 494 prefix = (panicstr == ci->ci_panicbuf) ? "*" : " "; 495 db_printf("%scpu%d: %s\n", 496 prefix, CPU_INFO_UNIT(ci), ci->ci_panicbuf); 497 panicked = 1; 498 } 499 } 500 if (!panicked) 501 db_printf("the kernel did not panic\n"); /* yet */ 502 } 503 504 /*ARGSUSED*/ 505 void 506 db_extent_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 507 { 508 extent_print_all(); 509 } 510 511 /*ARGSUSED*/ 512 void 513 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 514 { 515 pool_printit((struct pool *)addr, modif, db_printf); 516 } 517 518 /*ARGSUSED*/ 519 void 520 db_proc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 521 { 522 if (!have_addr) 523 addr = (db_expr_t)curproc; 524 525 proc_printit((struct proc *)addr, modif, db_printf); 526 } 527 528 #ifdef IPSEC 529 void 530 db_tdb_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 531 { 532 int full = 0; 533 534 if (modif[0] == 'f') 535 full = 1; 536 537 tdb_printit((void *)addr, full, db_printf); 538 } 539 #endif 540 541 /*ARGSUSED*/ 542 void 543 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 544 { 545 uvmexp_print(db_printf); 546 } 547 548 void bcstats_print(int (*)(const char *, ...)); 549 550 /*ARGSUSED*/ 551 void 552 db_bcstats_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 553 { 554 bcstats_print(db_printf); 555 } 556 557 /* 558 * 'show' commands 559 */ 560 561 struct db_command db_show_all_cmds[] = { 562 { "procs", db_show_all_procs, 0, NULL }, 563 { "callout", db_show_callout, 0, NULL }, 564 { "pools", db_show_all_pools, 0, NULL }, 565 { "mounts", db_show_all_mounts, 0, NULL }, 566 { "vnodes", db_show_all_vnodes, 0, NULL }, 567 { "bufs", db_show_all_bufs, 0, NULL }, 568 #ifdef NFSCLIENT 569 { "nfsreqs", db_show_all_nfsreqs, 0, NULL }, 570 { "nfsnodes", db_show_all_nfsnodes, 0, NULL }, 571 #endif 572 #ifdef IPSEC 573 { "tdbs", db_show_all_tdbs, 0, NULL }, 574 #endif 575 #ifdef WITNESS 576 { "locks", db_witness_list_all, 0, NULL }, 577 #endif 578 { NULL, NULL, 0, NULL } 579 }; 580 581 struct db_command db_show_cmds[] = { 582 { "all", NULL, 0, db_show_all_cmds }, 583 { "bcstats", db_bcstats_print_cmd, 0, NULL }, 584 { "breaks", db_listbreak_cmd, 0, NULL }, 585 { "buf", db_buf_print_cmd, 0, NULL }, 586 { "extents", db_extent_print_cmd, 0, NULL }, 587 #ifdef WITNESS 588 { "locks", db_witness_list, 0, NULL }, 589 #endif 590 { "malloc", db_malloc_print_cmd, 0, NULL }, 591 { "map", db_map_print_cmd, 0, NULL }, 592 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 593 { "mount", db_mount_print_cmd, 0, NULL }, 594 #ifdef NFSCLIENT 595 { "nfsreq", db_nfsreq_print_cmd, 0, NULL }, 596 { "nfsnode", db_nfsnode_print_cmd, 0, NULL }, 597 #endif 598 { "object", db_object_print_cmd, 0, NULL }, 599 { "page", db_page_print_cmd, 0, NULL }, 600 { "panic", db_show_panic_cmd, 0, NULL }, 601 { "pool", db_pool_print_cmd, 0, NULL }, 602 { "proc", db_proc_print_cmd, 0, NULL }, 603 { "registers", db_show_regs, 0, NULL }, 604 { "socket", db_socket_print_cmd, 0, NULL }, 605 { "struct", db_ctf_show_struct, CS_OWN, NULL }, 606 #ifdef IPSEC 607 { "tdb", db_tdb_print_cmd, 0, NULL }, 608 #endif 609 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 610 { "vnode", db_vnode_print_cmd, 0, NULL }, 611 { "watches", db_listwatch_cmd, 0, NULL }, 612 #ifdef WITNESS 613 { "witness", db_witness_display, 0, NULL }, 614 #endif 615 { NULL, NULL, 0, NULL } 616 }; 617 618 struct db_command db_boot_cmds[] = { 619 { "sync", db_boot_sync_cmd, 0, 0 }, 620 { "crash", db_boot_crash_cmd, 0, 0 }, 621 { "dump", db_boot_dump_cmd, 0, 0 }, 622 { "halt", db_boot_halt_cmd, 0, 0 }, 623 { "reboot", db_boot_reboot_cmd, 0, 0 }, 624 { "poweroff", db_boot_poweroff_cmd, 0, 0 }, 625 { NULL, } 626 }; 627 628 struct db_command db_command_table[] = { 629 #ifdef DB_MACHINE_COMMANDS 630 /* this must be the first entry, if it exists */ 631 { "machine", NULL, 0, NULL}, 632 #endif 633 { "kill", db_kill_cmd, 0, NULL }, 634 { "print", db_print_cmd, 0, NULL }, 635 { "p", db_print_cmd, 0, NULL }, 636 { "pprint", db_ctf_pprint_cmd, CS_OWN, NULL }, 637 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 638 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 639 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 640 { "set", db_set_cmd, CS_OWN, NULL }, 641 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 642 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 643 { "delete", db_delete_cmd, 0, NULL }, 644 { "d", db_delete_cmd, 0, NULL }, 645 { "break", db_breakpoint_cmd, 0, NULL }, 646 { "dwatch", db_deletewatch_cmd, 0, NULL }, 647 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 648 { "step", db_single_step_cmd, 0, NULL }, 649 { "s", db_single_step_cmd, 0, NULL }, 650 { "continue", db_continue_cmd, 0, NULL }, 651 { "c", db_continue_cmd, 0, NULL }, 652 { "until", db_trace_until_call_cmd,0, NULL }, 653 { "next", db_trace_until_matching_cmd,0, NULL }, 654 { "match", db_trace_until_matching_cmd,0, NULL }, 655 { "trace", db_stack_trace_cmd, 0, NULL }, 656 { "bt", db_stack_trace_cmd, 0, NULL }, 657 { "call", db_fncall, CS_OWN, NULL }, 658 { "ps", db_show_all_procs, 0, NULL }, 659 { "callout", db_show_callout, 0, NULL }, 660 { "reboot", db_boot_reboot_cmd, 0, NULL }, 661 { "show", NULL, 0, db_show_cmds }, 662 { "boot", NULL, 0, db_boot_cmds }, 663 { "help", db_help_cmd, 0, NULL }, 664 { "hangman", db_hangman, 0, NULL }, 665 { "dmesg", db_dmesg_cmd, 0, NULL }, 666 { NULL, NULL, 0, NULL } 667 }; 668 669 #ifdef DB_MACHINE_COMMANDS 670 671 /* this function should be called to install the machine dependent 672 commands. It should be called before the debugger is enabled */ 673 void 674 db_machine_commands_install(struct db_command *ptr) 675 { 676 db_command_table[0].more = ptr; 677 } 678 679 #endif 680 681 struct db_command *db_last_command = NULL; 682 683 void 684 db_help_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 685 { 686 db_cmd_list(db_command_table); 687 } 688 689 void 690 db_command_loop(void) 691 { 692 label_t db_jmpbuf; 693 label_t *savejmp; 694 extern int db_output_line; 695 696 /* 697 * Initialize 'prev' and 'next' to dot. 698 */ 699 db_prev = db_dot; 700 db_next = db_dot; 701 702 db_cmd_loop_done = 0; 703 704 savejmp = db_recover; 705 db_recover = &db_jmpbuf; 706 (void) setjmp(&db_jmpbuf); 707 708 while (!db_cmd_loop_done) { 709 710 if (db_print_position() != 0) 711 db_printf("\n"); 712 db_output_line = 0; 713 714 #ifdef MULTIPROCESSOR 715 db_printf("ddb{%d}> ", CPU_INFO_UNIT(curcpu())); 716 #else 717 db_printf("ddb> "); 718 #endif 719 (void) db_read_line(); 720 721 db_command(&db_last_command, db_command_table); 722 } 723 724 db_recover = savejmp; 725 } 726 727 void 728 db_error(char *s) 729 { 730 if (s) 731 db_printf("%s", s); 732 db_flush_lex(); 733 if (db_recover != NULL) 734 longjmp(db_recover); 735 } 736 737 738 /* 739 * Call random function: 740 * !expr(arg,arg,arg) 741 */ 742 /*ARGSUSED*/ 743 void 744 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 745 { 746 db_expr_t fn_addr; 747 #define MAXARGS 11 748 db_expr_t args[MAXARGS]; 749 int nargs = 0; 750 db_expr_t retval; 751 db_expr_t (*func)(db_expr_t, ...); 752 int t; 753 char tmpfmt[28]; 754 755 if (!db_expression(&fn_addr)) { 756 db_printf("Bad function\n"); 757 db_flush_lex(); 758 return; 759 } 760 func = (db_expr_t (*)(db_expr_t, ...)) fn_addr; 761 762 t = db_read_token(); 763 if (t == tLPAREN) { 764 if (db_expression(&args[0])) { 765 nargs++; 766 while ((t = db_read_token()) == tCOMMA) { 767 if (nargs == MAXARGS) { 768 db_printf("Too many arguments\n"); 769 db_flush_lex(); 770 return; 771 } 772 if (!db_expression(&args[nargs])) { 773 db_printf("Argument missing\n"); 774 db_flush_lex(); 775 return; 776 } 777 nargs++; 778 } 779 db_unread_token(t); 780 } 781 if (db_read_token() != tRPAREN) { 782 db_printf("?\n"); 783 db_flush_lex(); 784 return; 785 } 786 } 787 db_skip_to_eol(); 788 789 while (nargs < MAXARGS) 790 args[nargs++] = 0; 791 792 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 793 args[5], args[6], args[7], args[8], args[9]); 794 db_printf("%s\n", db_format(tmpfmt, sizeof tmpfmt, retval, 795 DB_FORMAT_N, 1, 0)); 796 } 797 798 void 799 db_reboot(int howto) 800 { 801 spl0(); 802 if (!curproc) 803 curproc = &proc0; 804 reboot(howto); 805 } 806 807 void 808 db_boot_sync_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 809 { 810 db_reboot(RB_AUTOBOOT | RB_TIMEBAD | RB_USERREQ); 811 } 812 813 void 814 db_boot_crash_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 815 { 816 db_reboot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD | RB_USERREQ); 817 } 818 819 void 820 db_boot_dump_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 821 { 822 db_reboot(RB_DUMP | RB_TIMEBAD | RB_USERREQ); 823 } 824 825 void 826 db_boot_halt_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 827 { 828 db_reboot(RB_NOSYNC | RB_HALT | RB_TIMEBAD | RB_USERREQ); 829 } 830 831 void 832 db_boot_reboot_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 833 { 834 boot(RB_RESET | RB_AUTOBOOT | RB_NOSYNC | RB_TIMEBAD | RB_USERREQ); 835 } 836 837 void 838 db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 839 { 840 db_reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ); 841 } 842 843 void 844 db_dmesg_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 845 { 846 int i, off; 847 char *p; 848 849 if (!msgbufp || msgbufp->msg_magic != MSG_MAGIC) 850 return; 851 off = msgbufp->msg_bufx; 852 if (off > msgbufp->msg_bufs) 853 off = 0; 854 for (i = 0, p = msgbufp->msg_bufc + off; 855 i < msgbufp->msg_bufs; i++, p++) { 856 if (p >= msgbufp->msg_bufc + msgbufp->msg_bufs) 857 p = msgbufp->msg_bufc; 858 if (*p != '\0') 859 db_putchar(*p); 860 } 861 db_putchar('\n'); 862 } 863 864 void 865 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 866 { 867 db_stack_trace_print(addr, have_addr, count, modif, db_printf); 868 } 869 870 void 871 db_show_regs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 872 { 873 struct db_variable *regp; 874 db_expr_t value, offset; 875 char * name; 876 char tmpfmt[28]; 877 878 for (regp = db_regs; regp < db_eregs; regp++) { 879 db_read_variable(regp, &value); 880 db_printf("%-12s%s", regp->name, 881 db_format(tmpfmt, sizeof tmpfmt, 882 (long)value, DB_FORMAT_N, 1, sizeof(long) * 3)); 883 db_find_xtrn_sym_and_offset((vaddr_t)value, &name, &offset); 884 if (name != 0 && offset <= db_maxoff && offset != value) { 885 db_printf("\t%s", name); 886 if (offset != 0) 887 db_printf("+%s", 888 db_format(tmpfmt, sizeof tmpfmt, 889 (long)offset, DB_FORMAT_R, 1, 0)); 890 } 891 db_printf("\n"); 892 } 893 db_print_loc_and_inst(PC_REGS(&ddb_regs)); 894 } 895 896 /* 897 * Write to file. 898 */ 899 /*ARGSUSED*/ 900 void 901 db_write_cmd(db_expr_t address, int have_addr, db_expr_t count, char *modif) 902 { 903 vaddr_t addr; 904 db_expr_t old_value; 905 db_expr_t new_value; 906 int size, wrote_one = 0; 907 char tmpfmt[28]; 908 909 addr = (vaddr_t) address; 910 911 switch (modif[0]) { 912 case 'b': 913 size = 1; 914 break; 915 case 'h': 916 size = 2; 917 break; 918 case 'l': 919 case '\0': 920 size = 4; 921 break; 922 #ifdef __LP64__ 923 case 'q': 924 size = 8; 925 break; 926 #endif 927 default: 928 size = -1; 929 db_error("Unknown size\n"); 930 /*NOTREACHED*/ 931 } 932 933 while (db_expression(&new_value)) { 934 old_value = db_get_value(addr, size, 0); 935 db_printsym(addr, DB_STGY_ANY, db_printf); 936 db_printf("\t\t%s\t", db_format(tmpfmt, sizeof tmpfmt, 937 old_value, DB_FORMAT_N, 0, 8)); 938 db_printf("=\t%s\n", db_format(tmpfmt, sizeof tmpfmt, 939 new_value, DB_FORMAT_N, 0, 8)); 940 db_put_value(addr, size, new_value); 941 addr += size; 942 943 wrote_one = 1; 944 } 945 946 if (!wrote_one) { 947 db_error("Nothing written.\n"); 948 /*NOTREACHED*/ 949 } 950 951 db_next = addr; 952 db_prev = addr - size; 953 954 db_skip_to_eol(); 955 } 956