1 /* $OpenBSD: db_command.c,v 1.94 2022/04/14 19:47:12 naddy 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_help_cmd(db_expr_t, int, db_expr_t, char *); 106 void db_fncall(db_expr_t, int, db_expr_t, char *); 107 void db_boot_sync_cmd(db_expr_t, int, db_expr_t, char *); 108 void db_boot_crash_cmd(db_expr_t, int, db_expr_t, char *); 109 void db_boot_dump_cmd(db_expr_t, int, db_expr_t, char *); 110 void db_boot_halt_cmd(db_expr_t, int, db_expr_t, char *); 111 void db_boot_reboot_cmd(db_expr_t, int, db_expr_t, char *); 112 void db_boot_poweroff_cmd(db_expr_t, int, db_expr_t, char *); 113 void db_stack_trace_cmd(db_expr_t, int, db_expr_t, char *); 114 void db_dmesg_cmd(db_expr_t, int, db_expr_t, char *); 115 void db_show_panic_cmd(db_expr_t, int, db_expr_t, char *); 116 void db_bcstats_print_cmd(db_expr_t, int, db_expr_t, char *); 117 void db_struct_offset_cmd(db_expr_t, int, db_expr_t, char *); 118 void db_ctf_show_struct(db_expr_t, int, db_expr_t, char *); 119 void db_show_regs(db_expr_t, int, db_expr_t, char *); 120 void db_write_cmd(db_expr_t, int, db_expr_t, char *); 121 void db_witness_display(db_expr_t, int, db_expr_t, char *); 122 void db_witness_list(db_expr_t, int, db_expr_t, char *); 123 void db_witness_list_all(db_expr_t, int, db_expr_t, char *); 124 125 126 /* 127 * Utility routine - discard tokens through end-of-line. 128 */ 129 void 130 db_skip_to_eol(void) 131 { 132 int t; 133 do { 134 t = db_read_token(); 135 } while (t != tEOL); 136 } 137 138 /* 139 * Results of command search. 140 */ 141 #define CMD_UNIQUE 0 142 #define CMD_FOUND 1 143 #define CMD_NONE 2 144 #define CMD_AMBIGUOUS 3 145 146 /* 147 * Search for command prefix. 148 */ 149 int 150 db_cmd_search(char *name, const struct db_command *table, 151 const struct db_command **cmdp) 152 { 153 const struct db_command *cmd; 154 int result = CMD_NONE; 155 156 for (cmd = table; cmd->name != 0; cmd++) { 157 char *lp = name, *rp = cmd->name; 158 int c; 159 160 while ((c = *lp) == *rp) { 161 if (c == 0) { 162 /* complete match */ 163 *cmdp = cmd; 164 return (CMD_UNIQUE); 165 } 166 lp++; 167 rp++; 168 } 169 if (c == 0) { 170 /* end of name, not end of command - partial match */ 171 if (result == CMD_FOUND) { 172 result = CMD_AMBIGUOUS; 173 /* but keep looking for a full match - 174 this lets us match single letters */ 175 } else { 176 *cmdp = cmd; 177 result = CMD_FOUND; 178 } 179 } 180 } 181 return (result); 182 } 183 184 void 185 db_cmd_list(const struct db_command *table) 186 { 187 const struct db_command *cmd; 188 189 for (cmd = table; cmd->name != 0; cmd++) { 190 db_printf("%-12s", cmd->name); 191 db_end_line(12); 192 } 193 } 194 195 void 196 db_command(const struct db_command **last_cmdp, 197 const struct db_command *cmd_table) 198 { 199 const struct db_command *cmd; 200 char modif[TOK_STRING_SIZE]; 201 db_expr_t addr, count; 202 int t, result, have_addr = 0; 203 204 t = db_read_token(); 205 if (t == tEOL) { 206 /* empty line repeats last command, at 'next' */ 207 cmd = *last_cmdp; 208 addr = (db_expr_t)db_next; 209 have_addr = 0; 210 count = 1; 211 modif[0] = '\0'; 212 } else if (t == tEXCL) { 213 db_fncall(0, 0, 0, NULL); 214 return; 215 } else if (t != tIDENT) { 216 db_printf("?\n"); 217 db_flush_lex(); 218 return; 219 } else { 220 /* Search for command */ 221 while (cmd_table) { 222 result = db_cmd_search(db_tok_string, 223 cmd_table, &cmd); 224 switch (result) { 225 case CMD_NONE: 226 db_printf("No such command\n"); 227 db_flush_lex(); 228 return; 229 case CMD_AMBIGUOUS: 230 db_printf("Ambiguous\n"); 231 db_flush_lex(); 232 return; 233 default: 234 break; 235 } 236 if ((cmd_table = cmd->more) != 0) { 237 t = db_read_token(); 238 if (t != tIDENT) { 239 db_cmd_list(cmd_table); 240 db_flush_lex(); 241 return; 242 } 243 } 244 } 245 246 if ((cmd->flag & CS_OWN) == 0) { 247 /* 248 * Standard syntax: 249 * command [/modifier] [addr] [,count] 250 */ 251 t = db_read_token(); 252 if (t == tSLASH) { 253 t = db_read_token(); 254 if (t != tIDENT) { 255 db_printf("Bad modifier\n"); 256 db_flush_lex(); 257 return; 258 } 259 db_strlcpy(modif, db_tok_string, sizeof(modif)); 260 } else { 261 db_unread_token(t); 262 modif[0] = '\0'; 263 } 264 265 if (db_expression(&addr)) { 266 db_dot = (vaddr_t) addr; 267 db_last_addr = db_dot; 268 have_addr = 1; 269 } else { 270 addr = (db_expr_t) db_dot; 271 have_addr = 0; 272 } 273 t = db_read_token(); 274 if (t == tCOMMA) { 275 if (!db_expression(&count)) { 276 db_printf("Count missing\n"); 277 db_flush_lex(); 278 return; 279 } 280 } else { 281 db_unread_token(t); 282 count = -1; 283 } 284 if ((cmd->flag & CS_MORE) == 0) 285 db_skip_to_eol(); 286 } 287 } 288 *last_cmdp = cmd; 289 if (cmd != 0) { 290 /* Execute the command. */ 291 (*cmd->fcn)(addr, have_addr, count, modif); 292 293 if (cmd->flag & CS_SET_DOT) { 294 /* 295 * If command changes dot, set dot to 296 * previous address displayed (if 'ed' style). 297 */ 298 if (db_ed_style) 299 db_dot = db_prev; 300 else 301 db_dot = db_next; 302 } 303 } else { 304 /* 305 * If command does not change dot, 306 * set 'next' location to be the same. 307 */ 308 db_next = db_dot; 309 } 310 } 311 312 /*ARGSUSED*/ 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 /*ARGSUSED*/ 325 void 326 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 327 { 328 int full = 0; 329 330 if (modif[0] == 'f') 331 full = 1; 332 333 uvm_map_printit((struct vm_map *) addr, full, db_printf); 334 } 335 336 /*ARGSUSED*/ 337 void 338 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 339 { 340 malloc_printit(db_printf); 341 } 342 343 /*ARGSUSED*/ 344 void 345 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 346 { 347 m_print((void *)addr, db_printf); 348 } 349 350 /*ARGSUSED*/ 351 void 352 db_socket_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 353 { 354 so_print((void *)addr, db_printf); 355 } 356 357 /*ARGSUSED*/ 358 void 359 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 360 { 361 int full = 0; 362 363 if (modif[0] == 'f') 364 full = 1; 365 366 vfs_mount_print((struct mount *) addr, full, db_printf); 367 } 368 369 void 370 db_show_all_mounts(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 371 { 372 int full = 0; 373 struct mount *mp; 374 375 if (modif[0] == 'f') 376 full = 1; 377 378 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 379 db_printf("mountpoint %p\n", mp); 380 vfs_mount_print(mp, full, db_printf); 381 } 382 } 383 384 extern struct pool vnode_pool; 385 void 386 db_show_all_vnodes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 387 { 388 int full = 0; 389 390 if (modif[0] == 'f') 391 full = 1; 392 393 pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print); 394 } 395 396 extern struct pool bufpool; 397 void 398 db_show_all_bufs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 399 { 400 int full = 0; 401 402 if (modif[0] == 'f') 403 full = 1; 404 405 pool_walk(&bufpool, full, db_printf, vfs_buf_print); 406 } 407 408 #ifdef IPSEC 409 void 410 db_show_all_tdbs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 411 { 412 int full = 0; 413 414 if (modif[0] == 'f') 415 full = 1; 416 417 pool_walk(&tdb_pool, full, db_printf, tdb_printit); 418 } 419 #endif 420 421 /*ARGSUSED*/ 422 void 423 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 424 { 425 int full = 0; 426 427 if (modif[0] == 'f') 428 full = 1; 429 430 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 431 } 432 433 /*ARGSUSED*/ 434 void 435 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 436 { 437 int full = 0; 438 439 if (modif[0] == 'f') 440 full = 1; 441 442 uvm_page_printit((struct vm_page *) addr, full, db_printf); 443 } 444 445 /*ARGSUSED*/ 446 void 447 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 448 { 449 int full = 0; 450 451 if (modif[0] == 'f') 452 full = 1; 453 454 vfs_vnode_print((void *)addr, full, db_printf); 455 } 456 457 #ifdef NFSCLIENT 458 /*ARGSUSED*/ 459 void 460 db_nfsreq_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 461 char *modif) 462 { 463 int full = 0; 464 465 if (modif[0] == 'f') 466 full = 1; 467 468 nfs_request_print((void *)addr, full, db_printf); 469 } 470 471 /*ARGSUSED*/ 472 void 473 db_nfsnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 474 char *modif) 475 { 476 int full = 0; 477 478 if (modif[0] == 'f') 479 full = 1; 480 481 nfs_node_print((void *)addr, full, db_printf); 482 } 483 #endif 484 485 486 /*ARGSUSED*/ 487 void 488 db_show_panic_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 489 { 490 struct cpu_info *ci; 491 char *prefix; 492 CPU_INFO_ITERATOR cii; 493 int panicked = 0; 494 495 CPU_INFO_FOREACH(cii, ci) { 496 if (ci->ci_panicbuf[0] != '\0') { 497 prefix = (panicstr == ci->ci_panicbuf) ? "*" : " "; 498 db_printf("%scpu%d: %s\n", 499 prefix, CPU_INFO_UNIT(ci), ci->ci_panicbuf); 500 panicked = 1; 501 } 502 } 503 if (!panicked) 504 db_printf("the kernel did not panic\n"); /* yet */ 505 } 506 507 /*ARGSUSED*/ 508 void 509 db_extent_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 510 { 511 extent_print_all(); 512 } 513 514 /*ARGSUSED*/ 515 void 516 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 517 { 518 pool_printit((struct pool *)addr, modif, db_printf); 519 } 520 521 /*ARGSUSED*/ 522 void 523 db_proc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 524 { 525 if (!have_addr) 526 addr = (db_expr_t)curproc; 527 528 proc_printit((struct proc *)addr, modif, db_printf); 529 } 530 531 #ifdef IPSEC 532 void 533 db_tdb_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 534 { 535 int full = 0; 536 537 if (modif[0] == 'f') 538 full = 1; 539 540 tdb_printit((void *)addr, full, db_printf); 541 } 542 #endif 543 544 /*ARGSUSED*/ 545 void 546 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 547 { 548 uvmexp_print(db_printf); 549 } 550 551 void bcstats_print(int (*)(const char *, ...)); 552 553 /*ARGSUSED*/ 554 void 555 db_bcstats_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 556 { 557 bcstats_print(db_printf); 558 } 559 560 /* 561 * 'show' commands 562 */ 563 564 const struct db_command db_show_all_cmds[] = { 565 { "procs", db_show_all_procs, 0, NULL }, 566 { "callout", db_show_callout, 0, NULL }, 567 { "pools", db_show_all_pools, 0, NULL }, 568 { "mounts", db_show_all_mounts, 0, NULL }, 569 { "vnodes", db_show_all_vnodes, 0, NULL }, 570 { "bufs", db_show_all_bufs, 0, NULL }, 571 #ifdef NFSCLIENT 572 { "nfsreqs", db_show_all_nfsreqs, 0, NULL }, 573 { "nfsnodes", db_show_all_nfsnodes, 0, NULL }, 574 #endif 575 #ifdef IPSEC 576 { "tdbs", db_show_all_tdbs, 0, NULL }, 577 #endif 578 #ifdef WITNESS 579 { "locks", db_witness_list_all, 0, NULL }, 580 #endif 581 { NULL, NULL, 0, NULL } 582 }; 583 584 const struct db_command db_show_cmds[] = { 585 { "all", NULL, 0, db_show_all_cmds }, 586 { "bcstats", db_bcstats_print_cmd, 0, NULL }, 587 { "breaks", db_listbreak_cmd, 0, NULL }, 588 { "buf", db_buf_print_cmd, 0, NULL }, 589 { "extents", db_extent_print_cmd, 0, NULL }, 590 #ifdef WITNESS 591 { "locks", db_witness_list, 0, NULL }, 592 #endif 593 { "malloc", db_malloc_print_cmd, 0, NULL }, 594 { "map", db_map_print_cmd, 0, NULL }, 595 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 596 { "mount", db_mount_print_cmd, 0, NULL }, 597 #ifdef NFSCLIENT 598 { "nfsreq", db_nfsreq_print_cmd, 0, NULL }, 599 { "nfsnode", db_nfsnode_print_cmd, 0, NULL }, 600 #endif 601 { "object", db_object_print_cmd, 0, NULL }, 602 { "page", db_page_print_cmd, 0, NULL }, 603 { "panic", db_show_panic_cmd, 0, NULL }, 604 { "pool", db_pool_print_cmd, 0, NULL }, 605 { "proc", db_proc_print_cmd, 0, NULL }, 606 { "registers", db_show_regs, 0, NULL }, 607 { "socket", db_socket_print_cmd, 0, NULL }, 608 { "struct", db_ctf_show_struct, CS_OWN, NULL }, 609 #ifdef IPSEC 610 { "tdb", db_tdb_print_cmd, 0, NULL }, 611 #endif 612 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 613 { "vnode", db_vnode_print_cmd, 0, NULL }, 614 { "watches", db_listwatch_cmd, 0, NULL }, 615 #ifdef WITNESS 616 { "witness", db_witness_display, 0, NULL }, 617 #endif 618 { NULL, NULL, 0, NULL } 619 }; 620 621 const struct db_command db_boot_cmds[] = { 622 { "sync", db_boot_sync_cmd, 0, 0 }, 623 { "crash", db_boot_crash_cmd, 0, 0 }, 624 { "dump", db_boot_dump_cmd, 0, 0 }, 625 { "halt", db_boot_halt_cmd, 0, 0 }, 626 { "reboot", db_boot_reboot_cmd, 0, 0 }, 627 { "poweroff", db_boot_poweroff_cmd, 0, 0 }, 628 { NULL, } 629 }; 630 631 const struct db_command db_command_table[] = { 632 #ifdef DB_MACHINE_COMMANDS 633 /* this must be the first entry, if it exists */ 634 { "machine", NULL, 0, db_machine_command_table }, 635 #endif 636 { "kill", db_kill_cmd, 0, NULL }, 637 { "print", db_print_cmd, 0, NULL }, 638 { "p", db_print_cmd, 0, NULL }, 639 { "pprint", db_ctf_pprint_cmd, CS_OWN, NULL }, 640 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 641 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 642 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 643 { "set", db_set_cmd, CS_OWN, NULL }, 644 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 645 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 646 { "delete", db_delete_cmd, 0, NULL }, 647 { "d", db_delete_cmd, 0, NULL }, 648 { "break", db_breakpoint_cmd, 0, NULL }, 649 { "dwatch", db_deletewatch_cmd, 0, NULL }, 650 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 651 { "step", db_single_step_cmd, 0, NULL }, 652 { "s", db_single_step_cmd, 0, NULL }, 653 { "continue", db_continue_cmd, 0, NULL }, 654 { "c", db_continue_cmd, 0, NULL }, 655 { "until", db_trace_until_call_cmd,0, NULL }, 656 { "next", db_trace_until_matching_cmd,0, NULL }, 657 { "match", db_trace_until_matching_cmd,0, NULL }, 658 { "trace", db_stack_trace_cmd, 0, NULL }, 659 { "bt", db_stack_trace_cmd, 0, NULL }, 660 { "call", db_fncall, CS_OWN, NULL }, 661 { "ps", db_show_all_procs, 0, NULL }, 662 { "callout", db_show_callout, 0, NULL }, 663 { "reboot", db_boot_reboot_cmd, 0, NULL }, 664 { "show", NULL, 0, db_show_cmds }, 665 { "boot", NULL, 0, db_boot_cmds }, 666 { "help", db_help_cmd, 0, NULL }, 667 { "hangman", db_hangman, 0, NULL }, 668 { "dmesg", db_dmesg_cmd, 0, NULL }, 669 { NULL, NULL, 0, NULL } 670 }; 671 672 const struct db_command *db_last_command = NULL; 673 674 void 675 db_help_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 676 { 677 db_cmd_list(db_command_table); 678 } 679 680 void 681 db_command_loop(void) 682 { 683 label_t db_jmpbuf; 684 label_t *savejmp; 685 extern int db_output_line; 686 687 /* 688 * Initialize 'prev' and 'next' to dot. 689 */ 690 db_prev = db_dot; 691 db_next = db_dot; 692 693 db_cmd_loop_done = 0; 694 695 savejmp = db_recover; 696 db_recover = &db_jmpbuf; 697 (void) setjmp(&db_jmpbuf); 698 699 while (!db_cmd_loop_done) { 700 701 if (db_print_position() != 0) 702 db_printf("\n"); 703 db_output_line = 0; 704 705 #ifdef MULTIPROCESSOR 706 db_printf("ddb{%d}> ", CPU_INFO_UNIT(curcpu())); 707 #else 708 db_printf("ddb> "); 709 #endif 710 (void) db_read_line(); 711 712 db_command(&db_last_command, db_command_table); 713 } 714 715 db_recover = savejmp; 716 } 717 718 void 719 db_error(char *s) 720 { 721 if (s) 722 db_printf("%s", s); 723 db_flush_lex(); 724 if (db_recover != NULL) 725 longjmp(db_recover); 726 } 727 728 729 /* 730 * Call random function: 731 * !expr(arg,arg,arg) 732 */ 733 /*ARGSUSED*/ 734 void 735 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 736 { 737 db_expr_t fn_addr; 738 #define MAXARGS 11 739 db_expr_t args[MAXARGS]; 740 int nargs = 0; 741 db_expr_t retval; 742 db_expr_t (*func)(db_expr_t, ...); 743 int t; 744 char tmpfmt[28]; 745 746 if (!db_expression(&fn_addr)) { 747 db_printf("Bad function\n"); 748 db_flush_lex(); 749 return; 750 } 751 func = (db_expr_t (*)(db_expr_t, ...)) fn_addr; 752 753 t = db_read_token(); 754 if (t == tLPAREN) { 755 if (db_expression(&args[0])) { 756 nargs++; 757 while ((t = db_read_token()) == tCOMMA) { 758 if (nargs == MAXARGS) { 759 db_printf("Too many arguments\n"); 760 db_flush_lex(); 761 return; 762 } 763 if (!db_expression(&args[nargs])) { 764 db_printf("Argument missing\n"); 765 db_flush_lex(); 766 return; 767 } 768 nargs++; 769 } 770 db_unread_token(t); 771 } 772 if (db_read_token() != tRPAREN) { 773 db_printf("?\n"); 774 db_flush_lex(); 775 return; 776 } 777 } 778 db_skip_to_eol(); 779 780 while (nargs < MAXARGS) 781 args[nargs++] = 0; 782 783 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 784 args[5], args[6], args[7], args[8], args[9]); 785 db_printf("%s\n", db_format(tmpfmt, sizeof tmpfmt, retval, 786 DB_FORMAT_N, 1, 0)); 787 } 788 789 void 790 db_reboot(int howto) 791 { 792 spl0(); 793 if (!curproc) 794 curproc = &proc0; 795 reboot(howto); 796 } 797 798 void 799 db_boot_sync_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 800 { 801 db_reboot(RB_AUTOBOOT | RB_TIMEBAD | RB_USERREQ); 802 } 803 804 void 805 db_boot_crash_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 806 { 807 db_reboot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD | RB_USERREQ); 808 } 809 810 void 811 db_boot_dump_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 812 { 813 db_reboot(RB_DUMP | RB_TIMEBAD | RB_USERREQ); 814 } 815 816 void 817 db_boot_halt_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 818 { 819 db_reboot(RB_NOSYNC | RB_HALT | RB_TIMEBAD | RB_USERREQ); 820 } 821 822 void 823 db_boot_reboot_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 824 { 825 boot(RB_RESET | RB_AUTOBOOT | RB_NOSYNC | RB_TIMEBAD | RB_USERREQ); 826 } 827 828 void 829 db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 830 { 831 db_reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ); 832 } 833 834 void 835 db_dmesg_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 836 { 837 int i, off; 838 char *p; 839 840 if (!msgbufp || msgbufp->msg_magic != MSG_MAGIC) 841 return; 842 off = msgbufp->msg_bufx; 843 if (off > msgbufp->msg_bufs) 844 off = 0; 845 for (i = 0, p = msgbufp->msg_bufc + off; 846 i < msgbufp->msg_bufs; i++, p++) { 847 if (p >= msgbufp->msg_bufc + msgbufp->msg_bufs) 848 p = msgbufp->msg_bufc; 849 if (*p != '\0') 850 db_putchar(*p); 851 } 852 db_putchar('\n'); 853 } 854 855 void 856 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 857 { 858 db_stack_trace_print(addr, have_addr, count, modif, db_printf); 859 } 860 861 void 862 db_show_regs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 863 { 864 struct db_variable *regp; 865 db_expr_t value, offset; 866 char * name; 867 char tmpfmt[28]; 868 869 for (regp = db_regs; regp < db_eregs; regp++) { 870 db_read_variable(regp, &value); 871 db_printf("%-12s%s", regp->name, 872 db_format(tmpfmt, sizeof tmpfmt, 873 (long)value, DB_FORMAT_N, 1, sizeof(long) * 3)); 874 db_find_xtrn_sym_and_offset((vaddr_t)value, &name, &offset); 875 if (name != 0 && offset <= db_maxoff && offset != value) { 876 db_printf("\t%s", name); 877 if (offset != 0) 878 db_printf("+%s", 879 db_format(tmpfmt, sizeof tmpfmt, 880 (long)offset, DB_FORMAT_R, 1, 0)); 881 } 882 db_printf("\n"); 883 } 884 db_print_loc_and_inst(PC_REGS(&ddb_regs)); 885 } 886 887 /* 888 * Write to file. 889 */ 890 /*ARGSUSED*/ 891 void 892 db_write_cmd(db_expr_t address, int have_addr, db_expr_t count, char *modif) 893 { 894 vaddr_t addr; 895 db_expr_t old_value; 896 db_expr_t new_value; 897 int size, wrote_one = 0; 898 char tmpfmt[28]; 899 900 addr = (vaddr_t) address; 901 902 switch (modif[0]) { 903 case 'b': 904 size = 1; 905 break; 906 case 'h': 907 size = 2; 908 break; 909 case 'l': 910 case '\0': 911 size = 4; 912 break; 913 #ifdef __LP64__ 914 case 'q': 915 size = 8; 916 break; 917 #endif 918 default: 919 size = -1; 920 db_error("Unknown size\n"); 921 /*NOTREACHED*/ 922 } 923 924 while (db_expression(&new_value)) { 925 old_value = db_get_value(addr, size, 0); 926 db_printsym(addr, DB_STGY_ANY, db_printf); 927 db_printf("\t\t%s\t", db_format(tmpfmt, sizeof tmpfmt, 928 old_value, DB_FORMAT_N, 0, 8)); 929 db_printf("=\t%s\n", db_format(tmpfmt, sizeof tmpfmt, 930 new_value, DB_FORMAT_N, 0, 8)); 931 db_put_value(addr, size, new_value); 932 addr += size; 933 934 wrote_one = 1; 935 } 936 937 if (!wrote_one) { 938 db_error("Nothing written.\n"); 939 /*NOTREACHED*/ 940 } 941 942 db_next = addr; 943 db_prev = addr - size; 944 945 db_skip_to_eol(); 946 } 947