1 /* $OpenBSD: db_command.c,v 1.91 2021/06/02 00:39:25 cheloha Exp $ */ 2 /* $NetBSD: db_command.c,v 1.20 1996/03/30 22:30:05 christos Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 */ 29 30 /* 31 * Command dispatcher. 32 */ 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/proc.h> 36 #include <sys/reboot.h> 37 #include <sys/extent.h> 38 #include <sys/pool.h> 39 #include <sys/msgbuf.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 43 #include <uvm/uvm_extern.h> 44 #include <machine/db_machdep.h> /* type definitions */ 45 46 #include <ddb/db_access.h> 47 #include <ddb/db_lex.h> 48 #include <ddb/db_output.h> 49 #include <ddb/db_command.h> 50 #include <ddb/db_break.h> 51 #include <ddb/db_watch.h> 52 #include <ddb/db_run.h> 53 #include <ddb/db_sym.h> 54 #include <ddb/db_var.h> 55 #include <ddb/db_variables.h> 56 #include <ddb/db_interface.h> 57 #include <ddb/db_extern.h> 58 59 #include <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 int db_ed_style = 1; 73 74 vaddr_t db_dot; /* current location */ 75 vaddr_t db_last_addr; /* last explicit address typed */ 76 vaddr_t db_prev; /* last address examined 77 or written */ 78 vaddr_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, int, db_expr_t, char *); 116 void db_write_cmd(db_expr_t, int, 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 = name, *rp = cmd->name; 153 int c; 154 155 while ((c = *lp) == *rp) { 156 if (c == 0) { 157 /* complete match */ 158 *cmdp = cmd; 159 return (CMD_UNIQUE); 160 } 161 lp++; 162 rp++; 163 } 164 if (c == 0) { 165 /* end of name, not end of command - partial match */ 166 if (result == CMD_FOUND) { 167 result = CMD_AMBIGUOUS; 168 /* but keep looking for a full match - 169 this lets us match single letters */ 170 } else { 171 *cmdp = cmd; 172 result = CMD_FOUND; 173 } 174 } 175 } 176 return (result); 177 } 178 179 void 180 db_cmd_list(struct db_command *table) 181 { 182 struct db_command *cmd; 183 184 for (cmd = table; cmd->name != 0; cmd++) { 185 db_printf("%-12s", cmd->name); 186 db_end_line(12); 187 } 188 } 189 190 void 191 db_command(struct db_command **last_cmdp, struct db_command *cmd_table) 192 { 193 struct db_command *cmd; 194 char modif[TOK_STRING_SIZE]; 195 db_expr_t addr, count; 196 int t, result, have_addr = 0; 197 198 t = db_read_token(); 199 if (t == tEOL) { 200 /* empty line repeats last command, at 'next' */ 201 cmd = *last_cmdp; 202 addr = (db_expr_t)db_next; 203 have_addr = 0; 204 count = 1; 205 modif[0] = '\0'; 206 } else if (t == tEXCL) { 207 db_fncall(0, 0, 0, NULL); 208 return; 209 } else if (t != tIDENT) { 210 db_printf("?\n"); 211 db_flush_lex(); 212 return; 213 } else { 214 /* Search for command */ 215 while (cmd_table) { 216 result = db_cmd_search(db_tok_string, 217 cmd_table, &cmd); 218 switch (result) { 219 case CMD_NONE: 220 db_printf("No such command\n"); 221 db_flush_lex(); 222 return; 223 case CMD_AMBIGUOUS: 224 db_printf("Ambiguous\n"); 225 db_flush_lex(); 226 return; 227 default: 228 break; 229 } 230 if ((cmd_table = cmd->more) != 0) { 231 t = db_read_token(); 232 if (t != tIDENT) { 233 db_cmd_list(cmd_table); 234 db_flush_lex(); 235 return; 236 } 237 } 238 } 239 240 if ((cmd->flag & CS_OWN) == 0) { 241 /* 242 * Standard syntax: 243 * command [/modifier] [addr] [,count] 244 */ 245 t = db_read_token(); 246 if (t == tSLASH) { 247 t = db_read_token(); 248 if (t != tIDENT) { 249 db_printf("Bad modifier\n"); 250 db_flush_lex(); 251 return; 252 } 253 db_strlcpy(modif, db_tok_string, sizeof(modif)); 254 } else { 255 db_unread_token(t); 256 modif[0] = '\0'; 257 } 258 259 if (db_expression(&addr)) { 260 db_dot = (vaddr_t) addr; 261 db_last_addr = db_dot; 262 have_addr = 1; 263 } else { 264 addr = (db_expr_t) db_dot; 265 have_addr = 0; 266 } 267 t = db_read_token(); 268 if (t == tCOMMA) { 269 if (!db_expression(&count)) { 270 db_printf("Count missing\n"); 271 db_flush_lex(); 272 return; 273 } 274 } else { 275 db_unread_token(t); 276 count = -1; 277 } 278 if ((cmd->flag & CS_MORE) == 0) 279 db_skip_to_eol(); 280 } 281 } 282 *last_cmdp = cmd; 283 if (cmd != 0) { 284 /* Execute the command. */ 285 (*cmd->fcn)(addr, have_addr, count, modif); 286 287 if (cmd->flag & CS_SET_DOT) { 288 /* 289 * If command changes dot, set dot to 290 * previous address displayed (if 'ed' style). 291 */ 292 if (db_ed_style) 293 db_dot = db_prev; 294 else 295 db_dot = db_next; 296 } 297 } else { 298 /* 299 * If command does not change dot, 300 * set 'next' location to be the same. 301 */ 302 db_next = db_dot; 303 } 304 } 305 306 /*ARGSUSED*/ 307 void 308 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 309 { 310 int full = 0; 311 312 if (modif[0] == 'f') 313 full = 1; 314 315 vfs_buf_print((void *) addr, full, db_printf); 316 } 317 318 /*ARGSUSED*/ 319 void 320 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 321 { 322 int full = 0; 323 324 if (modif[0] == 'f') 325 full = 1; 326 327 uvm_map_printit((struct vm_map *) addr, full, db_printf); 328 } 329 330 /*ARGSUSED*/ 331 void 332 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 333 { 334 malloc_printit(db_printf); 335 } 336 337 /*ARGSUSED*/ 338 void 339 db_mbuf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 340 { 341 m_print((void *)addr, db_printf); 342 } 343 344 /*ARGSUSED*/ 345 void 346 db_socket_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 347 { 348 so_print((void *)addr, db_printf); 349 } 350 351 /*ARGSUSED*/ 352 void 353 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 354 { 355 int full = 0; 356 357 if (modif[0] == 'f') 358 full = 1; 359 360 vfs_mount_print((struct mount *) addr, full, db_printf); 361 } 362 363 void 364 db_show_all_mounts(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 365 { 366 int full = 0; 367 struct mount *mp; 368 369 if (modif[0] == 'f') 370 full = 1; 371 372 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 373 db_printf("mountpoint %p\n", mp); 374 vfs_mount_print(mp, full, db_printf); 375 } 376 } 377 378 extern struct pool vnode_pool; 379 void 380 db_show_all_vnodes(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 381 { 382 int full = 0; 383 384 if (modif[0] == 'f') 385 full = 1; 386 387 pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print); 388 } 389 390 extern struct pool bufpool; 391 void 392 db_show_all_bufs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 393 { 394 int full = 0; 395 396 if (modif[0] == 'f') 397 full = 1; 398 399 pool_walk(&bufpool, full, db_printf, vfs_buf_print); 400 } 401 402 /*ARGSUSED*/ 403 void 404 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 405 { 406 int full = 0; 407 408 if (modif[0] == 'f') 409 full = 1; 410 411 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 412 } 413 414 /*ARGSUSED*/ 415 void 416 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 417 { 418 int full = 0; 419 420 if (modif[0] == 'f') 421 full = 1; 422 423 uvm_page_printit((struct vm_page *) addr, full, db_printf); 424 } 425 426 /*ARGSUSED*/ 427 void 428 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 429 { 430 int full = 0; 431 432 if (modif[0] == 'f') 433 full = 1; 434 435 vfs_vnode_print((void *)addr, full, db_printf); 436 } 437 438 #ifdef NFSCLIENT 439 /*ARGSUSED*/ 440 void 441 db_nfsreq_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 442 char *modif) 443 { 444 int full = 0; 445 446 if (modif[0] == 'f') 447 full = 1; 448 449 nfs_request_print((void *)addr, full, db_printf); 450 } 451 452 /*ARGSUSED*/ 453 void 454 db_nfsnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 455 char *modif) 456 { 457 int full = 0; 458 459 if (modif[0] == 'f') 460 full = 1; 461 462 nfs_node_print((void *)addr, full, db_printf); 463 } 464 #endif 465 466 467 /*ARGSUSED*/ 468 void 469 db_show_panic_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 470 { 471 struct cpu_info *ci; 472 char *prefix; 473 CPU_INFO_ITERATOR cii; 474 int panicked = 0; 475 476 CPU_INFO_FOREACH(cii, ci) { 477 if (ci->ci_panicbuf[0] != '\0') { 478 prefix = (panicstr == ci->ci_panicbuf) ? "*" : " "; 479 db_printf("%scpu%d: %s\n", 480 prefix, CPU_INFO_UNIT(ci), ci->ci_panicbuf); 481 panicked = 1; 482 } 483 } 484 if (!panicked) 485 db_printf("the kernel did not panic\n"); /* yet */ 486 } 487 488 /*ARGSUSED*/ 489 void 490 db_extent_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 491 { 492 extent_print_all(); 493 } 494 495 /*ARGSUSED*/ 496 void 497 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 498 { 499 pool_printit((struct pool *)addr, modif, db_printf); 500 } 501 502 /*ARGSUSED*/ 503 void 504 db_proc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 505 { 506 if (!have_addr) 507 addr = (db_expr_t)curproc; 508 509 proc_printit((struct proc *)addr, modif, db_printf); 510 } 511 512 /*ARGSUSED*/ 513 void 514 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 515 { 516 uvmexp_print(db_printf); 517 } 518 519 void bcstats_print(int (*)(const char *, ...)); 520 521 /*ARGSUSED*/ 522 void 523 db_bcstats_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 524 { 525 bcstats_print(db_printf); 526 } 527 528 /* 529 * 'show' commands 530 */ 531 532 struct db_command db_show_all_cmds[] = { 533 { "procs", db_show_all_procs, 0, NULL }, 534 { "callout", db_show_callout, 0, NULL }, 535 { "pools", db_show_all_pools, 0, NULL }, 536 { "mounts", db_show_all_mounts, 0, NULL }, 537 { "vnodes", db_show_all_vnodes, 0, NULL }, 538 { "bufs", db_show_all_bufs, 0, NULL }, 539 #ifdef NFSCLIENT 540 { "nfsreqs", db_show_all_nfsreqs, 0, NULL }, 541 { "nfsnodes", db_show_all_nfsnodes, 0, NULL }, 542 #endif 543 #ifdef WITNESS 544 { "locks", db_witness_list_all, 0, NULL }, 545 #endif 546 { NULL, NULL, 0, NULL } 547 }; 548 549 struct db_command db_show_cmds[] = { 550 { "all", NULL, 0, db_show_all_cmds }, 551 { "bcstats", db_bcstats_print_cmd, 0, NULL }, 552 { "breaks", db_listbreak_cmd, 0, NULL }, 553 { "buf", db_buf_print_cmd, 0, NULL }, 554 { "extents", db_extent_print_cmd, 0, NULL }, 555 #ifdef WITNESS 556 { "locks", db_witness_list, 0, NULL }, 557 #endif 558 { "malloc", db_malloc_print_cmd, 0, NULL }, 559 { "map", db_map_print_cmd, 0, NULL }, 560 { "mbuf", db_mbuf_print_cmd, 0, NULL }, 561 { "mount", db_mount_print_cmd, 0, NULL }, 562 #ifdef NFSCLIENT 563 { "nfsreq", db_nfsreq_print_cmd, 0, NULL }, 564 { "nfsnode", db_nfsnode_print_cmd, 0, NULL }, 565 #endif 566 { "object", db_object_print_cmd, 0, NULL }, 567 { "page", db_page_print_cmd, 0, NULL }, 568 { "panic", db_show_panic_cmd, 0, NULL }, 569 { "pool", db_pool_print_cmd, 0, NULL }, 570 { "proc", db_proc_print_cmd, 0, NULL }, 571 { "registers", db_show_regs, 0, NULL }, 572 { "socket", db_socket_print_cmd, 0, NULL }, 573 { "struct", db_ctf_show_struct, CS_OWN, NULL }, 574 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 575 { "vnode", db_vnode_print_cmd, 0, NULL }, 576 { "watches", db_listwatch_cmd, 0, NULL }, 577 #ifdef WITNESS 578 { "witness", db_witness_display, 0, NULL }, 579 #endif 580 { NULL, NULL, 0, NULL } 581 }; 582 583 struct db_command db_boot_cmds[] = { 584 { "sync", db_boot_sync_cmd, 0, 0 }, 585 { "crash", db_boot_crash_cmd, 0, 0 }, 586 { "dump", db_boot_dump_cmd, 0, 0 }, 587 { "halt", db_boot_halt_cmd, 0, 0 }, 588 { "reboot", db_boot_reboot_cmd, 0, 0 }, 589 { "poweroff", db_boot_poweroff_cmd, 0, 0 }, 590 { NULL, } 591 }; 592 593 struct db_command db_command_table[] = { 594 #ifdef DB_MACHINE_COMMANDS 595 /* this must be the first entry, if it exists */ 596 { "machine", NULL, 0, NULL}, 597 #endif 598 { "kill", db_kill_cmd, 0, NULL }, 599 { "print", db_print_cmd, 0, NULL }, 600 { "p", db_print_cmd, 0, NULL }, 601 { "pprint", db_ctf_pprint_cmd, CS_OWN, NULL }, 602 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 603 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 604 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 605 { "set", db_set_cmd, CS_OWN, NULL }, 606 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 607 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 608 { "delete", db_delete_cmd, 0, NULL }, 609 { "d", db_delete_cmd, 0, NULL }, 610 { "break", db_breakpoint_cmd, 0, NULL }, 611 { "dwatch", db_deletewatch_cmd, 0, NULL }, 612 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 613 { "step", db_single_step_cmd, 0, NULL }, 614 { "s", db_single_step_cmd, 0, NULL }, 615 { "continue", db_continue_cmd, 0, NULL }, 616 { "c", db_continue_cmd, 0, NULL }, 617 { "until", db_trace_until_call_cmd,0, NULL }, 618 { "next", db_trace_until_matching_cmd,0, NULL }, 619 { "match", db_trace_until_matching_cmd,0, NULL }, 620 { "trace", db_stack_trace_cmd, 0, NULL }, 621 { "bt", db_stack_trace_cmd, 0, NULL }, 622 { "call", db_fncall, CS_OWN, NULL }, 623 { "ps", db_show_all_procs, 0, NULL }, 624 { "callout", db_show_callout, 0, NULL }, 625 { "reboot", db_boot_reboot_cmd, 0, NULL }, 626 { "show", NULL, 0, db_show_cmds }, 627 { "boot", NULL, 0, db_boot_cmds }, 628 { "help", db_help_cmd, 0, NULL }, 629 { "hangman", db_hangman, 0, NULL }, 630 { "dmesg", db_dmesg_cmd, 0, NULL }, 631 { NULL, NULL, 0, NULL } 632 }; 633 634 #ifdef DB_MACHINE_COMMANDS 635 636 /* this function should be called to install the machine dependent 637 commands. It should be called before the debugger is enabled */ 638 void 639 db_machine_commands_install(struct db_command *ptr) 640 { 641 db_command_table[0].more = ptr; 642 } 643 644 #endif 645 646 struct db_command *db_last_command = NULL; 647 648 void 649 db_help_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 650 { 651 db_cmd_list(db_command_table); 652 } 653 654 void 655 db_command_loop(void) 656 { 657 label_t db_jmpbuf; 658 label_t *savejmp; 659 extern int db_output_line; 660 661 /* 662 * Initialize 'prev' and 'next' to dot. 663 */ 664 db_prev = db_dot; 665 db_next = db_dot; 666 667 db_cmd_loop_done = 0; 668 669 savejmp = db_recover; 670 db_recover = &db_jmpbuf; 671 (void) setjmp(&db_jmpbuf); 672 673 while (!db_cmd_loop_done) { 674 675 if (db_print_position() != 0) 676 db_printf("\n"); 677 db_output_line = 0; 678 679 #ifdef MULTIPROCESSOR 680 db_printf("ddb{%d}> ", CPU_INFO_UNIT(curcpu())); 681 #else 682 db_printf("ddb> "); 683 #endif 684 (void) db_read_line(); 685 686 db_command(&db_last_command, db_command_table); 687 } 688 689 db_recover = savejmp; 690 } 691 692 void 693 db_error(char *s) 694 { 695 if (s) 696 db_printf("%s", s); 697 db_flush_lex(); 698 if (db_recover != NULL) 699 longjmp(db_recover); 700 } 701 702 703 /* 704 * Call random function: 705 * !expr(arg,arg,arg) 706 */ 707 /*ARGSUSED*/ 708 void 709 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 710 { 711 db_expr_t fn_addr; 712 #define MAXARGS 11 713 db_expr_t args[MAXARGS]; 714 int nargs = 0; 715 db_expr_t retval; 716 db_expr_t (*func)(db_expr_t, ...); 717 int t; 718 char tmpfmt[28]; 719 720 if (!db_expression(&fn_addr)) { 721 db_printf("Bad function\n"); 722 db_flush_lex(); 723 return; 724 } 725 func = (db_expr_t (*)(db_expr_t, ...)) fn_addr; 726 727 t = db_read_token(); 728 if (t == tLPAREN) { 729 if (db_expression(&args[0])) { 730 nargs++; 731 while ((t = db_read_token()) == tCOMMA) { 732 if (nargs == MAXARGS) { 733 db_printf("Too many arguments\n"); 734 db_flush_lex(); 735 return; 736 } 737 if (!db_expression(&args[nargs])) { 738 db_printf("Argument missing\n"); 739 db_flush_lex(); 740 return; 741 } 742 nargs++; 743 } 744 db_unread_token(t); 745 } 746 if (db_read_token() != tRPAREN) { 747 db_printf("?\n"); 748 db_flush_lex(); 749 return; 750 } 751 } 752 db_skip_to_eol(); 753 754 while (nargs < MAXARGS) 755 args[nargs++] = 0; 756 757 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 758 args[5], args[6], args[7], args[8], args[9]); 759 db_printf("%s\n", db_format(tmpfmt, sizeof tmpfmt, retval, 760 DB_FORMAT_N, 1, 0)); 761 } 762 763 void 764 db_reboot(int howto) 765 { 766 spl0(); 767 if (!curproc) 768 curproc = &proc0; 769 reboot(howto); 770 } 771 772 void 773 db_boot_sync_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 774 { 775 db_reboot(RB_AUTOBOOT | RB_TIMEBAD | RB_USERREQ); 776 } 777 778 void 779 db_boot_crash_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 780 { 781 db_reboot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD | RB_USERREQ); 782 } 783 784 void 785 db_boot_dump_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 786 { 787 db_reboot(RB_DUMP | RB_TIMEBAD | RB_USERREQ); 788 } 789 790 void 791 db_boot_halt_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 792 { 793 db_reboot(RB_NOSYNC | RB_HALT | RB_TIMEBAD | RB_USERREQ); 794 } 795 796 void 797 db_boot_reboot_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 798 { 799 boot(RB_RESET | RB_AUTOBOOT | RB_NOSYNC | RB_TIMEBAD | RB_USERREQ); 800 } 801 802 void 803 db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 804 { 805 db_reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ); 806 } 807 808 void 809 db_dmesg_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif) 810 { 811 int i, off; 812 char *p; 813 814 if (!msgbufp || msgbufp->msg_magic != MSG_MAGIC) 815 return; 816 off = msgbufp->msg_bufx; 817 if (off > msgbufp->msg_bufs) 818 off = 0; 819 for (i = 0, p = msgbufp->msg_bufc + off; 820 i < msgbufp->msg_bufs; i++, p++) { 821 if (p >= msgbufp->msg_bufc + msgbufp->msg_bufs) 822 p = msgbufp->msg_bufc; 823 if (*p != '\0') 824 db_putchar(*p); 825 } 826 db_putchar('\n'); 827 } 828 829 void 830 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 831 { 832 db_stack_trace_print(addr, have_addr, count, modif, db_printf); 833 } 834 835 void 836 db_show_regs(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 837 { 838 struct db_variable *regp; 839 db_expr_t value, offset; 840 char * name; 841 char tmpfmt[28]; 842 843 for (regp = db_regs; regp < db_eregs; regp++) { 844 db_read_variable(regp, &value); 845 db_printf("%-12s%s", regp->name, 846 db_format(tmpfmt, sizeof tmpfmt, 847 (long)value, DB_FORMAT_N, 1, sizeof(long) * 3)); 848 db_find_xtrn_sym_and_offset((vaddr_t)value, &name, &offset); 849 if (name != 0 && offset <= db_maxoff && offset != value) { 850 db_printf("\t%s", name); 851 if (offset != 0) 852 db_printf("+%s", 853 db_format(tmpfmt, sizeof tmpfmt, 854 (long)offset, DB_FORMAT_R, 1, 0)); 855 } 856 db_printf("\n"); 857 } 858 db_print_loc_and_inst(PC_REGS(&ddb_regs)); 859 } 860 861 /* 862 * Write to file. 863 */ 864 /*ARGSUSED*/ 865 void 866 db_write_cmd(db_expr_t address, int have_addr, db_expr_t count, char *modif) 867 { 868 vaddr_t addr; 869 db_expr_t old_value; 870 db_expr_t new_value; 871 int size, wrote_one = 0; 872 char tmpfmt[28]; 873 874 addr = (vaddr_t) address; 875 876 switch (modif[0]) { 877 case 'b': 878 size = 1; 879 break; 880 case 'h': 881 size = 2; 882 break; 883 case 'l': 884 case '\0': 885 size = 4; 886 break; 887 #ifdef __LP64__ 888 case 'q': 889 size = 8; 890 break; 891 #endif 892 default: 893 size = -1; 894 db_error("Unknown size\n"); 895 /*NOTREACHED*/ 896 } 897 898 while (db_expression(&new_value)) { 899 old_value = db_get_value(addr, size, 0); 900 db_printsym(addr, DB_STGY_ANY, db_printf); 901 db_printf("\t\t%s\t", db_format(tmpfmt, sizeof tmpfmt, 902 old_value, DB_FORMAT_N, 0, 8)); 903 db_printf("=\t%s\n", db_format(tmpfmt, sizeof tmpfmt, 904 new_value, DB_FORMAT_N, 0, 8)); 905 db_put_value(addr, size, new_value); 906 addr += size; 907 908 wrote_one = 1; 909 } 910 911 if (!wrote_one) { 912 db_error("Nothing written.\n"); 913 /*NOTREACHED*/ 914 } 915 916 db_next = addr; 917 db_prev = addr - size; 918 919 db_skip_to_eol(); 920 } 921