1 /* $OpenBSD: db_command.c,v 1.84 2018/09/18 18:36:27 anton 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 <uvm/uvm_ddb.h> 60 61 /* 62 * Exported global variables 63 */ 64 int db_cmd_loop_done; 65 label_t *db_recover; 66 67 /* 68 * if 'ed' style: 'dot' is set at start of last item printed, 69 * and '+' points to next line. 70 * Otherwise: 'dot' points to next item, '..' points to last. 71 */ 72 boolean_t db_ed_style = TRUE; 73 74 db_addr_t db_dot; /* current location */ 75 db_addr_t db_last_addr; /* last explicit address typed */ 76 db_addr_t db_prev; /* last address examined 77 or written */ 78 db_addr_t db_next; /* next address to be examined 79 or written */ 80 81 int db_cmd_search(char *, struct db_command *, struct db_command **); 82 void db_cmd_list(struct db_command *); 83 void db_ctf_pprint_cmd(db_expr_t, int, db_expr_t,char *); 84 void db_map_print_cmd(db_expr_t, int, db_expr_t, char *); 85 void db_buf_print_cmd(db_expr_t, int, db_expr_t, char *); 86 void db_malloc_print_cmd(db_expr_t, int, db_expr_t, char *); 87 void db_mbuf_print_cmd(db_expr_t, int, db_expr_t, char *); 88 void db_mount_print_cmd(db_expr_t, int, db_expr_t, char *); 89 void db_show_all_mounts(db_expr_t, int, db_expr_t, char *); 90 void db_show_all_vnodes(db_expr_t, int, db_expr_t, char *); 91 void db_show_all_bufs(db_expr_t, int, db_expr_t, char *); 92 void db_object_print_cmd(db_expr_t, int, db_expr_t, char *); 93 void db_page_print_cmd(db_expr_t, int, db_expr_t, char *); 94 void db_extent_print_cmd(db_expr_t, int, db_expr_t, char *); 95 void db_pool_print_cmd(db_expr_t, int, db_expr_t, char *); 96 void db_proc_print_cmd(db_expr_t, int, db_expr_t, char *); 97 void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, char *); 98 void db_vnode_print_cmd(db_expr_t, int, db_expr_t, char *); 99 void db_nfsreq_print_cmd(db_expr_t, int, db_expr_t, char *); 100 void db_nfsnode_print_cmd(db_expr_t, int, db_expr_t, char *); 101 void db_help_cmd(db_expr_t, int, db_expr_t, char *); 102 void db_fncall(db_expr_t, int, db_expr_t, char *); 103 void db_boot_sync_cmd(db_expr_t, int, db_expr_t, char *); 104 void db_boot_crash_cmd(db_expr_t, int, db_expr_t, char *); 105 void db_boot_dump_cmd(db_expr_t, int, db_expr_t, char *); 106 void db_boot_halt_cmd(db_expr_t, int, db_expr_t, char *); 107 void db_boot_reboot_cmd(db_expr_t, int, db_expr_t, char *); 108 void db_boot_poweroff_cmd(db_expr_t, int, db_expr_t, char *); 109 void db_stack_trace_cmd(db_expr_t, int, db_expr_t, char *); 110 void db_dmesg_cmd(db_expr_t, int, db_expr_t, char *); 111 void db_show_panic_cmd(db_expr_t, int, db_expr_t, char *); 112 void db_bcstats_print_cmd(db_expr_t, int, db_expr_t, char *); 113 void db_struct_offset_cmd(db_expr_t, int, db_expr_t, char *); 114 void db_ctf_show_struct(db_expr_t, int, db_expr_t, char *); 115 void db_show_regs(db_expr_t, boolean_t, db_expr_t, char *); 116 void db_write_cmd(db_expr_t, boolean_t, db_expr_t, char *); 117 void db_witness_display(db_expr_t, int, db_expr_t, char *); 118 void db_witness_list(db_expr_t, int, db_expr_t, char *); 119 void db_witness_list_all(db_expr_t, int, db_expr_t, char *); 120 121 122 /* 123 * Utility routine - discard tokens through end-of-line. 124 */ 125 void 126 db_skip_to_eol(void) 127 { 128 int t; 129 do { 130 t = db_read_token(); 131 } while (t != tEOL); 132 } 133 134 /* 135 * Results of command search. 136 */ 137 #define CMD_UNIQUE 0 138 #define CMD_FOUND 1 139 #define CMD_NONE 2 140 #define CMD_AMBIGUOUS 3 141 142 /* 143 * Search for command prefix. 144 */ 145 int 146 db_cmd_search(char *name, struct db_command *table, struct db_command **cmdp) 147 { 148 struct db_command *cmd; 149 int result = CMD_NONE; 150 151 for (cmd = table; cmd->name != 0; cmd++) { 152 char *lp; 153 char *rp; 154 int c; 155 156 lp = name; 157 rp = cmd->name; 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 - 169 partial match */ 170 if (result == CMD_FOUND) { 171 result = CMD_AMBIGUOUS; 172 /* but keep looking for a full match - 173 this lets us match single letters */ 174 } 175 else { 176 *cmdp = cmd; 177 result = CMD_FOUND; 178 } 179 } 180 } 181 return (result); 182 } 183 184 void 185 db_cmd_list(struct db_command *table) 186 { 187 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(struct db_command **last_cmdp, struct db_command *cmd_table) 197 { 198 struct db_command *cmd; 199 int t; 200 char modif[TOK_STRING_SIZE]; 201 db_expr_t addr, count; 202 boolean_t have_addr = FALSE; 203 int result; 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 = FALSE; 211 count = 1; 212 modif[0] = '\0'; 213 } 214 else if (t == tEXCL) { 215 db_fncall(0, 0, 0, NULL); 216 return; 217 } 218 else if (t != tIDENT) { 219 db_printf("?\n"); 220 db_flush_lex(); 221 return; 222 } 223 else { 224 /* 225 * Search for command 226 */ 227 while (cmd_table) { 228 result = db_cmd_search(db_tok_string, 229 cmd_table, 230 &cmd); 231 switch (result) { 232 case CMD_NONE: 233 db_printf("No such command\n"); 234 db_flush_lex(); 235 return; 236 case CMD_AMBIGUOUS: 237 db_printf("Ambiguous\n"); 238 db_flush_lex(); 239 return; 240 default: 241 break; 242 } 243 if ((cmd_table = cmd->more) != 0) { 244 t = db_read_token(); 245 if (t != tIDENT) { 246 db_cmd_list(cmd_table); 247 db_flush_lex(); 248 return; 249 } 250 } 251 } 252 253 if ((cmd->flag & CS_OWN) == 0) { 254 /* 255 * Standard syntax: 256 * command [/modifier] [addr] [,count] 257 */ 258 t = db_read_token(); 259 if (t == tSLASH) { 260 t = db_read_token(); 261 if (t != tIDENT) { 262 db_printf("Bad modifier\n"); 263 db_flush_lex(); 264 return; 265 } 266 db_strlcpy(modif, db_tok_string, sizeof(modif)); 267 } 268 else { 269 db_unread_token(t); 270 modif[0] = '\0'; 271 } 272 273 if (db_expression(&addr)) { 274 db_dot = (db_addr_t) addr; 275 db_last_addr = db_dot; 276 have_addr = TRUE; 277 } 278 else { 279 addr = (db_expr_t) db_dot; 280 have_addr = FALSE; 281 } 282 t = db_read_token(); 283 if (t == tCOMMA) { 284 if (!db_expression(&count)) { 285 db_printf("Count missing\n"); 286 db_flush_lex(); 287 return; 288 } 289 } 290 else { 291 db_unread_token(t); 292 count = -1; 293 } 294 if ((cmd->flag & CS_MORE) == 0) { 295 db_skip_to_eol(); 296 } 297 } 298 } 299 *last_cmdp = cmd; 300 if (cmd != 0) { 301 /* 302 * Execute the command. 303 */ 304 (*cmd->fcn)(addr, have_addr, count, modif); 305 306 if (cmd->flag & CS_SET_DOT) { 307 /* 308 * If command changes dot, set dot to 309 * previous address displayed (if 'ed' style). 310 */ 311 if (db_ed_style) { 312 db_dot = db_prev; 313 } 314 else { 315 db_dot = db_next; 316 } 317 } 318 else { 319 /* 320 * If command does not change dot, 321 * set 'next' location to be the same. 322 */ 323 db_next = db_dot; 324 } 325 } 326 } 327 328 /*ARGSUSED*/ 329 void 330 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 331 { 332 boolean_t full = FALSE; 333 334 if (modif[0] == 'f') 335 full = TRUE; 336 337 vfs_buf_print((void *) addr, full, db_printf); 338 } 339 340 /*ARGSUSED*/ 341 void 342 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 343 { 344 boolean_t full = FALSE; 345 346 if (modif[0] == 'f') 347 full = TRUE; 348 349 uvm_map_printit((struct vm_map *) addr, full, db_printf); 350 } 351 352 /*ARGSUSED*/ 353 void 354 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 355 { 356 malloc_printit(db_printf); 357 } 358 359 /*ARGSUSED*/ 360 void 361 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 362 { 363 m_print((void *)addr, db_printf); 364 } 365 366 /*ARGSUSED*/ 367 void 368 db_socket_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 369 { 370 so_print((void *)addr, db_printf); 371 } 372 373 /*ARGSUSED*/ 374 void 375 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 376 { 377 boolean_t full = FALSE; 378 379 if (modif[0] == 'f') 380 full = TRUE; 381 382 vfs_mount_print((struct mount *) addr, full, db_printf); 383 } 384 385 void 386 db_show_all_mounts(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 387 { 388 boolean_t full = FALSE; 389 struct mount *mp; 390 391 if (modif[0] == 'f') 392 full = TRUE; 393 394 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 395 db_printf("mountpoint %p\n", mp); 396 vfs_mount_print(mp, full, db_printf); 397 } 398 } 399 400 extern struct pool vnode_pool; 401 void 402 db_show_all_vnodes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 403 { 404 boolean_t full = FALSE; 405 406 if (modif[0] == 'f') 407 full = TRUE; 408 409 pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print); 410 } 411 412 extern struct pool bufpool; 413 void 414 db_show_all_bufs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 415 { 416 boolean_t full = FALSE; 417 418 if (modif[0] == 'f') 419 full = TRUE; 420 421 pool_walk(&bufpool, full, db_printf, vfs_buf_print); 422 } 423 424 /*ARGSUSED*/ 425 void 426 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 427 { 428 boolean_t full = FALSE; 429 430 if (modif[0] == 'f') 431 full = TRUE; 432 433 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 434 } 435 436 /*ARGSUSED*/ 437 void 438 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 439 { 440 boolean_t full = FALSE; 441 442 if (modif[0] == 'f') 443 full = TRUE; 444 445 uvm_page_printit((struct vm_page *) addr, full, db_printf); 446 } 447 448 /*ARGSUSED*/ 449 void 450 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 451 { 452 boolean_t full = FALSE; 453 454 if (modif[0] == 'f') 455 full = TRUE; 456 457 vfs_vnode_print((void *)addr, full, db_printf); 458 } 459 460 #ifdef NFSCLIENT 461 /*ARGSUSED*/ 462 void 463 db_nfsreq_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 464 char *modif) 465 { 466 boolean_t full = FALSE; 467 468 if (modif[0] == 'f') 469 full = TRUE; 470 471 nfs_request_print((void *)addr, full, db_printf); 472 } 473 474 /*ARGSUSED*/ 475 void 476 db_nfsnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 477 char *modif) 478 { 479 boolean_t full = FALSE; 480 481 if (modif[0] == 'f') 482 full = TRUE; 483 484 nfs_node_print((void *)addr, full, db_printf); 485 } 486 #endif 487 488 489 /*ARGSUSED*/ 490 void 491 db_show_panic_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 492 { 493 if (panicstr) 494 db_printf("%s\n", panicstr); 495 else if (faultstr) { 496 db_printf("kernel page fault\n"); 497 db_printf("%s\n", faultstr); 498 db_stack_trace_print(addr, have_addr, 1, modif, db_printf); 499 } 500 else 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 /*ARGSUSED*/ 529 void 530 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 531 { 532 uvmexp_print(db_printf); 533 } 534 535 void bcstats_print(int (*)(const char *, ...)); 536 537 /*ARGSUSED*/ 538 void 539 db_bcstats_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 540 { 541 bcstats_print(db_printf); 542 } 543 544 /* 545 * 'show' commands 546 */ 547 548 struct db_command db_show_all_cmds[] = { 549 { "procs", db_show_all_procs, 0, NULL }, 550 { "callout", db_show_callout, 0, NULL }, 551 { "pools", db_show_all_pools, 0, NULL }, 552 { "mounts", db_show_all_mounts, 0, NULL }, 553 { "vnodes", db_show_all_vnodes, 0, NULL }, 554 { "bufs", db_show_all_bufs, 0, NULL }, 555 #ifdef NFSCLIENT 556 { "nfsreqs", db_show_all_nfsreqs, 0, NULL }, 557 { "nfsnodes", db_show_all_nfsnodes, 0, NULL }, 558 #endif 559 #ifdef WITNESS 560 { "locks", db_witness_list_all, 0, NULL }, 561 #endif 562 { NULL, NULL, 0, NULL } 563 }; 564 565 struct db_command db_show_cmds[] = { 566 { "all", NULL, 0, db_show_all_cmds }, 567 { "bcstats", db_bcstats_print_cmd, 0, NULL }, 568 { "breaks", db_listbreak_cmd, 0, NULL }, 569 { "buf", db_buf_print_cmd, 0, NULL }, 570 { "extents", db_extent_print_cmd, 0, NULL }, 571 #ifdef WITNESS 572 { "locks", db_witness_list, 0, NULL }, 573 #endif 574 { "malloc", db_malloc_print_cmd, 0, NULL }, 575 { "map", db_map_print_cmd, 0, NULL }, 576 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 577 { "mount", db_mount_print_cmd, 0, NULL }, 578 #ifdef NFSCLIENT 579 { "nfsreq", db_nfsreq_print_cmd, 0, NULL }, 580 { "nfsnode", db_nfsnode_print_cmd, 0, NULL }, 581 #endif 582 { "object", db_object_print_cmd, 0, NULL }, 583 { "page", db_page_print_cmd, 0, NULL }, 584 { "panic", db_show_panic_cmd, 0, NULL }, 585 { "pool", db_pool_print_cmd, 0, NULL }, 586 { "proc", db_proc_print_cmd, 0, NULL }, 587 { "registers", db_show_regs, 0, NULL }, 588 { "socket", db_socket_print_cmd, 0, NULL }, 589 { "struct", db_ctf_show_struct, CS_OWN, NULL }, 590 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 591 { "vnode", db_vnode_print_cmd, 0, NULL }, 592 { "watches", db_listwatch_cmd, 0, NULL }, 593 #ifdef WITNESS 594 { "witness", db_witness_display, 0, NULL }, 595 #endif 596 { NULL, NULL, 0, NULL } 597 }; 598 599 struct db_command db_boot_cmds[] = { 600 { "sync", db_boot_sync_cmd, 0, 0 }, 601 { "crash", db_boot_crash_cmd, 0, 0 }, 602 { "dump", db_boot_dump_cmd, 0, 0 }, 603 { "halt", db_boot_halt_cmd, 0, 0 }, 604 { "reboot", db_boot_reboot_cmd, 0, 0 }, 605 { "poweroff", db_boot_poweroff_cmd, 0, 0 }, 606 { NULL, } 607 }; 608 609 struct db_command db_command_table[] = { 610 #ifdef DB_MACHINE_COMMANDS 611 /* this must be the first entry, if it exists */ 612 { "machine", NULL, 0, NULL}, 613 #endif 614 { "kill", db_kill_cmd, 0, NULL }, 615 { "print", db_print_cmd, 0, NULL }, 616 { "p", db_print_cmd, 0, NULL }, 617 { "pprint", db_ctf_pprint_cmd, CS_OWN, NULL }, 618 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 619 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 620 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 621 { "set", db_set_cmd, CS_OWN, NULL }, 622 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 623 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 624 { "delete", db_delete_cmd, 0, NULL }, 625 { "d", db_delete_cmd, 0, NULL }, 626 { "break", db_breakpoint_cmd, 0, NULL }, 627 { "dwatch", db_deletewatch_cmd, 0, NULL }, 628 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 629 { "step", db_single_step_cmd, 0, NULL }, 630 { "s", db_single_step_cmd, 0, NULL }, 631 { "continue", db_continue_cmd, 0, NULL }, 632 { "c", db_continue_cmd, 0, NULL }, 633 { "until", db_trace_until_call_cmd,0, NULL }, 634 { "next", db_trace_until_matching_cmd,0, NULL }, 635 { "match", db_trace_until_matching_cmd,0, NULL }, 636 { "trace", db_stack_trace_cmd, 0, NULL }, 637 { "bt", db_stack_trace_cmd, 0, NULL }, 638 { "call", db_fncall, CS_OWN, NULL }, 639 { "ps", db_show_all_procs, 0, NULL }, 640 { "callout", db_show_callout, 0, NULL }, 641 { "show", NULL, 0, db_show_cmds }, 642 { "boot", NULL, 0, db_boot_cmds }, 643 { "help", db_help_cmd, 0, NULL }, 644 { "hangman", db_hangman, 0, NULL }, 645 { "dmesg", db_dmesg_cmd, 0, NULL }, 646 { NULL, NULL, 0, NULL } 647 }; 648 649 #ifdef DB_MACHINE_COMMANDS 650 651 /* this function should be called to install the machine dependent 652 commands. It should be called before the debugger is enabled */ 653 void db_machine_commands_install(struct db_command *ptr) 654 { 655 db_command_table[0].more = ptr; 656 return; 657 } 658 659 #endif 660 661 struct db_command *db_last_command = NULL; 662 663 void 664 db_help_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 665 { 666 db_cmd_list(db_command_table); 667 } 668 669 void 670 db_command_loop(void) 671 { 672 label_t db_jmpbuf; 673 label_t *savejmp; 674 extern int db_output_line; 675 676 /* 677 * Initialize 'prev' and 'next' to dot. 678 */ 679 db_prev = db_dot; 680 db_next = db_dot; 681 682 db_cmd_loop_done = 0; 683 684 savejmp = db_recover; 685 db_recover = &db_jmpbuf; 686 (void) setjmp(&db_jmpbuf); 687 688 while (!db_cmd_loop_done) { 689 690 if (db_print_position() != 0) 691 db_printf("\n"); 692 db_output_line = 0; 693 694 #ifdef MULTIPROCESSOR 695 db_printf("ddb{%d}> ", CPU_INFO_UNIT(curcpu())); 696 #else 697 db_printf("ddb> "); 698 #endif 699 (void) db_read_line(); 700 701 db_command(&db_last_command, db_command_table); 702 } 703 704 db_recover = savejmp; 705 } 706 707 void 708 db_error(char *s) 709 { 710 if (s) 711 db_printf("%s", s); 712 db_flush_lex(); 713 if (db_recover != NULL) 714 longjmp(db_recover); 715 } 716 717 718 /* 719 * Call random function: 720 * !expr(arg,arg,arg) 721 */ 722 /*ARGSUSED*/ 723 void 724 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 725 { 726 db_expr_t fn_addr; 727 #define MAXARGS 11 728 db_expr_t args[MAXARGS]; 729 int nargs = 0; 730 db_expr_t retval; 731 db_expr_t (*func)(db_expr_t, ...); 732 int t; 733 char tmpfmt[28]; 734 735 if (!db_expression(&fn_addr)) { 736 db_printf("Bad function\n"); 737 db_flush_lex(); 738 return; 739 } 740 func = (db_expr_t (*)(db_expr_t, ...)) fn_addr; 741 742 t = db_read_token(); 743 if (t == tLPAREN) { 744 if (db_expression(&args[0])) { 745 nargs++; 746 while ((t = db_read_token()) == tCOMMA) { 747 if (nargs == MAXARGS) { 748 db_printf("Too many arguments\n"); 749 db_flush_lex(); 750 return; 751 } 752 if (!db_expression(&args[nargs])) { 753 db_printf("Argument missing\n"); 754 db_flush_lex(); 755 return; 756 } 757 nargs++; 758 } 759 db_unread_token(t); 760 } 761 if (db_read_token() != tRPAREN) { 762 db_printf("?\n"); 763 db_flush_lex(); 764 return; 765 } 766 } 767 db_skip_to_eol(); 768 769 while (nargs < MAXARGS) { 770 args[nargs++] = 0; 771 } 772 773 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 774 args[5], args[6], args[7], args[8], args[9]); 775 db_printf("%s\n", db_format(tmpfmt, sizeof tmpfmt, retval, 776 DB_FORMAT_N, 1, 0)); 777 } 778 779 void 780 db_reboot(int howto) 781 { 782 spl0(); 783 if (!curproc) 784 curproc = &proc0; 785 reboot(howto); 786 } 787 788 void 789 db_boot_sync_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 790 { 791 db_reboot(RB_AUTOBOOT | RB_TIMEBAD | RB_USERREQ); 792 } 793 794 void 795 db_boot_crash_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 796 { 797 db_reboot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD | RB_USERREQ); 798 } 799 800 void 801 db_boot_dump_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 802 { 803 db_reboot(RB_DUMP | RB_TIMEBAD | RB_USERREQ); 804 } 805 806 void 807 db_boot_halt_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 808 { 809 db_reboot(RB_NOSYNC | RB_HALT | RB_TIMEBAD | RB_USERREQ); 810 } 811 812 void 813 db_boot_reboot_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 814 { 815 db_reboot(RB_AUTOBOOT | RB_NOSYNC | RB_TIMEBAD | RB_USERREQ); 816 } 817 818 void 819 db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 820 { 821 db_reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ); 822 } 823 824 void 825 db_dmesg_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 826 { 827 int i, off; 828 char *p; 829 830 if (!msgbufp || msgbufp->msg_magic != MSG_MAGIC) 831 return; 832 off = msgbufp->msg_bufx; 833 if (off > msgbufp->msg_bufs) 834 off = 0; 835 for (i = 0, p = msgbufp->msg_bufc + off; 836 i < msgbufp->msg_bufs; i++, p++) { 837 if (p >= msgbufp->msg_bufc + msgbufp->msg_bufs) 838 p = msgbufp->msg_bufc; 839 if (*p != '\0') 840 db_putchar(*p); 841 } 842 db_putchar('\n'); 843 } 844 845 void 846 db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count, 847 char *modif) 848 { 849 db_stack_trace_print(addr, have_addr, count, modif, db_printf); 850 } 851 852 void 853 db_show_regs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 854 { 855 struct db_variable *regp; 856 db_expr_t value, offset; 857 char * name; 858 char tmpfmt[28]; 859 860 for (regp = db_regs; regp < db_eregs; regp++) { 861 db_read_variable(regp, &value); 862 db_printf("%-12s%s", regp->name, db_format(tmpfmt, sizeof tmpfmt, 863 (long)value, DB_FORMAT_N, 1, sizeof(long) * 3)); 864 db_find_xtrn_sym_and_offset((db_addr_t)value, &name, &offset); 865 if (name != 0 && offset <= db_maxoff && offset != value) { 866 db_printf("\t%s", name); 867 if (offset != 0) 868 db_printf("+%s", db_format(tmpfmt, sizeof tmpfmt, 869 (long)offset, DB_FORMAT_R, 1, 0)); 870 } 871 db_printf("\n"); 872 } 873 db_print_loc_and_inst(PC_REGS(&ddb_regs)); 874 } 875 876 /* 877 * Write to file. 878 */ 879 /*ARGSUSED*/ 880 void 881 db_write_cmd(db_expr_t address, boolean_t have_addr, db_expr_t count, 882 char *modif) 883 { 884 db_addr_t addr; 885 db_expr_t old_value; 886 db_expr_t new_value; 887 int size; 888 boolean_t wrote_one = FALSE; 889 char tmpfmt[28]; 890 891 addr = (db_addr_t) address; 892 893 switch (modif[0]) { 894 case 'b': 895 size = 1; 896 break; 897 case 'h': 898 size = 2; 899 break; 900 case 'l': 901 case '\0': 902 size = 4; 903 break; 904 #ifdef __LP64__ 905 case 'q': 906 size = 8; 907 break; 908 #endif 909 default: 910 size = -1; 911 db_error("Unknown size\n"); 912 /*NOTREACHED*/ 913 } 914 915 while (db_expression(&new_value)) { 916 old_value = db_get_value(addr, size, FALSE); 917 db_printsym(addr, DB_STGY_ANY, db_printf); 918 db_printf("\t\t%s\t", db_format(tmpfmt, sizeof tmpfmt, 919 old_value, DB_FORMAT_N, 0, 8)); 920 db_printf("=\t%s\n", db_format(tmpfmt, sizeof tmpfmt, 921 new_value, DB_FORMAT_N, 0, 8)); 922 db_put_value(addr, size, new_value); 923 addr += size; 924 925 wrote_one = TRUE; 926 } 927 928 if (!wrote_one) { 929 db_error("Nothing written.\n"); 930 /*NOTREACHED*/ 931 } 932 933 db_next = addr; 934 db_prev = addr - size; 935 936 db_skip_to_eol(); 937 } 938