db_command.c revision 1.26
1 /* $NetBSD: db_command.c,v 1.26 1998/07/04 22:18:48 jonathan Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 #include "opt_uvm.h" 30 31 /* 32 * Command dispatcher. 33 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/reboot.h> 37 #include <sys/proc.h> 38 39 #include <machine/db_machdep.h> /* type definitions */ 40 41 #include <ddb/db_lex.h> 42 #include <ddb/db_output.h> 43 #include <ddb/db_command.h> 44 #include <ddb/db_break.h> 45 #include <ddb/db_watch.h> 46 #include <ddb/db_run.h> 47 #include <ddb/db_variables.h> 48 #include <ddb/db_interface.h> 49 #include <ddb/db_sym.h> 50 #include <ddb/db_extern.h> 51 52 #include <vm/vm.h> 53 54 #if defined(UVM) 55 #include <uvm/uvm_extern.h> 56 #include <uvm/uvm_ddb.h> 57 #endif 58 59 /* 60 * Exported global variables 61 */ 62 boolean_t db_cmd_loop_done; 63 label_t *db_recover; 64 65 /* 66 * if 'ed' style: 'dot' is set at start of last item printed, 67 * and '+' points to next line. 68 * Otherwise: 'dot' points to next item, '..' points to last. 69 */ 70 boolean_t db_ed_style = TRUE; 71 72 /* 73 * Utility routine - discard tokens through end-of-line. 74 */ 75 void 76 db_skip_to_eol() 77 { 78 int t; 79 do { 80 t = db_read_token(); 81 } while (t != tEOL); 82 } 83 84 /* 85 * Results of command search. 86 */ 87 #define CMD_UNIQUE 0 88 #define CMD_FOUND 1 89 #define CMD_NONE 2 90 #define CMD_AMBIGUOUS 3 91 #define CMD_HELP 4 92 93 /* 94 * Search for command prefix. 95 */ 96 int 97 db_cmd_search(name, table, cmdp) 98 char *name; 99 struct db_command *table; 100 struct db_command **cmdp; /* out */ 101 { 102 struct db_command *cmd; 103 int result = CMD_NONE; 104 105 for (cmd = table; cmd->name != 0; cmd++) { 106 register char *lp; 107 register char *rp; 108 register int c; 109 110 lp = name; 111 rp = cmd->name; 112 while ((c = *lp) == *rp) { 113 if (c == 0) { 114 /* complete match */ 115 *cmdp = cmd; 116 return (CMD_UNIQUE); 117 } 118 lp++; 119 rp++; 120 } 121 if (c == 0) { 122 /* end of name, not end of command - 123 partial match */ 124 if (result == CMD_FOUND) { 125 result = CMD_AMBIGUOUS; 126 /* but keep looking for a full match - 127 this lets us match single letters */ 128 } 129 else { 130 *cmdp = cmd; 131 result = CMD_FOUND; 132 } 133 } 134 } 135 if (result == CMD_NONE) { 136 /* check for 'help' */ 137 if (name[0] == 'h' && name[1] == 'e' 138 && name[2] == 'l' && name[3] == 'p') 139 result = CMD_HELP; 140 } 141 return (result); 142 } 143 144 void 145 db_cmd_list(table) 146 struct db_command *table; 147 { 148 register struct db_command *cmd; 149 150 for (cmd = table; cmd->name != 0; cmd++) { 151 db_printf("%-12s", cmd->name); 152 db_end_line(); 153 } 154 } 155 156 void 157 db_command(last_cmdp, cmd_table) 158 struct db_command **last_cmdp; /* IN_OUT */ 159 struct db_command *cmd_table; 160 { 161 struct db_command *cmd; 162 int t; 163 char modif[TOK_STRING_SIZE]; 164 db_expr_t addr, count; 165 boolean_t have_addr = FALSE; 166 int result; 167 168 t = db_read_token(); 169 if (t == tEOL) { 170 /* empty line repeats last command, at 'next' */ 171 cmd = *last_cmdp; 172 addr = (db_expr_t)db_next; 173 have_addr = FALSE; 174 count = 1; 175 modif[0] = '\0'; 176 } 177 else if (t == tEXCL) { 178 db_fncall(0, 0, 0, NULL); 179 return; 180 } 181 else if (t != tIDENT) { 182 db_printf("?\n"); 183 db_flush_lex(); 184 return; 185 } 186 else { 187 /* 188 * Search for command 189 */ 190 while (cmd_table) { 191 result = db_cmd_search(db_tok_string, 192 cmd_table, 193 &cmd); 194 switch (result) { 195 case CMD_NONE: 196 db_printf("No such command\n"); 197 db_flush_lex(); 198 return; 199 case CMD_AMBIGUOUS: 200 db_printf("Ambiguous\n"); 201 db_flush_lex(); 202 return; 203 case CMD_HELP: 204 db_cmd_list(cmd_table); 205 db_flush_lex(); 206 return; 207 default: 208 break; 209 } 210 if ((cmd_table = cmd->more) != 0) { 211 t = db_read_token(); 212 if (t != tIDENT) { 213 db_cmd_list(cmd_table); 214 db_flush_lex(); 215 return; 216 } 217 } 218 } 219 220 if ((cmd->flag & CS_OWN) == 0) { 221 /* 222 * Standard syntax: 223 * command [/modifier] [addr] [,count] 224 */ 225 t = db_read_token(); 226 if (t == tSLASH) { 227 t = db_read_token(); 228 if (t != tIDENT) { 229 db_printf("Bad modifier\n"); 230 db_flush_lex(); 231 return; 232 } 233 db_strcpy(modif, db_tok_string); 234 } 235 else { 236 db_unread_token(t); 237 modif[0] = '\0'; 238 } 239 240 if (db_expression(&addr)) { 241 db_dot = (db_addr_t) addr; 242 db_last_addr = db_dot; 243 have_addr = TRUE; 244 } 245 else { 246 addr = (db_expr_t) db_dot; 247 have_addr = FALSE; 248 } 249 t = db_read_token(); 250 if (t == tCOMMA) { 251 if (!db_expression(&count)) { 252 db_printf("Count missing\n"); 253 db_flush_lex(); 254 return; 255 } 256 } 257 else { 258 db_unread_token(t); 259 count = -1; 260 } 261 if ((cmd->flag & CS_MORE) == 0) { 262 db_skip_to_eol(); 263 } 264 } 265 } 266 *last_cmdp = cmd; 267 if (cmd != 0) { 268 /* 269 * Execute the command. 270 */ 271 (*cmd->fcn)(addr, have_addr, count, modif); 272 273 if (cmd->flag & CS_SET_DOT) { 274 /* 275 * If command changes dot, set dot to 276 * previous address displayed (if 'ed' style). 277 */ 278 if (db_ed_style) { 279 db_dot = db_prev; 280 } 281 else { 282 db_dot = db_next; 283 } 284 } 285 else { 286 /* 287 * If command does not change dot, 288 * set 'next' location to be the same. 289 */ 290 db_next = db_dot; 291 } 292 } 293 } 294 295 /*ARGSUSED*/ 296 void 297 db_map_print_cmd(addr, have_addr, count, modif) 298 db_expr_t addr; 299 int have_addr; 300 db_expr_t count; 301 char * modif; 302 { 303 boolean_t full = FALSE; 304 305 if (modif[0] == 'f') 306 full = TRUE; 307 308 #if defined(UVM) 309 uvm_map_printit((vm_map_t) addr, full, db_printf); 310 #else 311 _vm_map_print((vm_map_t) addr, full, db_printf); 312 #endif 313 } 314 315 /*ARGSUSED*/ 316 void 317 db_object_print_cmd(addr, have_addr, count, modif) 318 db_expr_t addr; 319 int have_addr; 320 db_expr_t count; 321 char * modif; 322 { 323 boolean_t full = FALSE; 324 325 if (modif[0] == 'f') 326 full = TRUE; 327 328 #if defined(UVM) 329 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 330 #else 331 _vm_object_print((vm_object_t) addr, full, db_printf); 332 #endif 333 } 334 335 /*ARGSUSED*/ 336 void 337 db_page_print_cmd(addr, have_addr, count, modif) 338 db_expr_t addr; 339 int have_addr; 340 db_expr_t count; 341 char * modif; 342 { 343 boolean_t full = FALSE; 344 345 if (modif[0] == 'f') 346 full = TRUE; 347 348 #if defined(UVM) 349 uvm_page_printit((struct vm_page *) addr, full, db_printf); 350 #else 351 printf("only supported by UVM\n"); 352 #endif 353 } 354 355 /* 356 * 'show' commands 357 */ 358 359 struct db_command db_show_all_cmds[] = { 360 { "procs", db_show_all_procs, 0, NULL }, 361 { "callout", db_show_callout, 0, NULL }, 362 { NULL, NULL, 0, NULL } 363 }; 364 365 struct db_command db_show_cmds[] = { 366 { "all", NULL, 0, db_show_all_cmds }, 367 { "registers", db_show_regs, 0, NULL }, 368 { "breaks", db_listbreak_cmd, 0, NULL }, 369 { "watches", db_listwatch_cmd, 0, NULL }, 370 { "map", db_map_print_cmd, 0, NULL }, 371 { "object", db_object_print_cmd, 0, NULL }, 372 { "page", db_page_print_cmd, 0, NULL }, 373 { NULL, NULL, 0, NULL, } 374 }; 375 376 struct db_command db_command_table[] = { 377 #ifdef DB_MACHINE_COMMANDS 378 /* this must be the first entry, if it exists */ 379 { "machine", NULL, 0, NULL}, 380 #endif 381 { "print", db_print_cmd, 0, NULL }, 382 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 383 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 384 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 385 { "set", db_set_cmd, CS_OWN, NULL }, 386 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 387 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 388 { "delete", db_delete_cmd, 0, NULL }, 389 { "d", db_delete_cmd, 0, NULL }, 390 { "break", db_breakpoint_cmd, 0, NULL }, 391 { "dwatch", db_deletewatch_cmd, 0, NULL }, 392 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 393 { "step", db_single_step_cmd, 0, NULL }, 394 { "s", db_single_step_cmd, 0, NULL }, 395 { "continue", db_continue_cmd, 0, NULL }, 396 { "c", db_continue_cmd, 0, NULL }, 397 { "until", db_trace_until_call_cmd,0, NULL }, 398 { "next", db_trace_until_matching_cmd,0, NULL }, 399 { "match", db_trace_until_matching_cmd,0, NULL }, 400 { "trace", db_stack_trace_cmd, 0, NULL }, 401 { "call", db_fncall, CS_OWN, NULL }, 402 { "ps", db_show_all_procs, 0, NULL }, 403 { "kill", db_kill_proc, CS_OWN, NULL }, 404 { "callout", db_show_callout, 0, NULL }, 405 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 406 { "show", NULL, 0, db_show_cmds }, 407 { NULL, NULL, 0, NULL } 408 }; 409 410 #ifdef DB_MACHINE_COMMANDS 411 412 /* this function should be called to install the machine dependent 413 commands. It should be called before the debugger is enabled */ 414 void db_machine_commands_install(ptr) 415 struct db_command *ptr; 416 { 417 db_command_table[0].more = ptr; 418 return; 419 } 420 421 #endif 422 423 struct db_command *db_last_command = 0; 424 425 void 426 db_help_cmd() 427 { 428 struct db_command *cmd = db_command_table; 429 430 while (cmd->name != 0) { 431 db_printf("%-12s", cmd->name); 432 db_end_line(); 433 cmd++; 434 } 435 } 436 437 void 438 db_command_loop() 439 { 440 label_t db_jmpbuf; 441 label_t *savejmp; 442 extern int db_output_line; 443 444 /* 445 * Initialize 'prev' and 'next' to dot. 446 */ 447 db_prev = db_dot; 448 db_next = db_dot; 449 450 db_cmd_loop_done = 0; 451 452 savejmp = db_recover; 453 db_recover = &db_jmpbuf; 454 (void) setjmp(&db_jmpbuf); 455 456 while (!db_cmd_loop_done) { 457 if (db_print_position() != 0) 458 db_printf("\n"); 459 db_output_line = 0; 460 461 db_printf("db> "); 462 (void) db_read_line(); 463 464 db_command(&db_last_command, db_command_table); 465 } 466 467 db_recover = savejmp; 468 } 469 470 void 471 db_error(s) 472 char *s; 473 { 474 if (s) 475 db_printf(s); 476 db_flush_lex(); 477 longjmp(db_recover); 478 } 479 480 481 /* 482 * Call random function: 483 * !expr(arg,arg,arg) 484 */ 485 /*ARGSUSED*/ 486 void 487 db_fncall(addr, have_addr, count, modif) 488 db_expr_t addr; 489 int have_addr; 490 db_expr_t count; 491 char * modif; 492 { 493 db_expr_t fn_addr; 494 #define MAXARGS 11 495 db_expr_t args[MAXARGS]; 496 int nargs = 0; 497 db_expr_t retval; 498 db_expr_t (*func) __P((db_expr_t, ...)); 499 int t; 500 501 if (!db_expression(&fn_addr)) { 502 db_printf("Bad function\n"); 503 db_flush_lex(); 504 return; 505 } 506 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 507 508 t = db_read_token(); 509 if (t == tLPAREN) { 510 if (db_expression(&args[0])) { 511 nargs++; 512 while ((t = db_read_token()) == tCOMMA) { 513 if (nargs == MAXARGS) { 514 db_printf("Too many arguments\n"); 515 db_flush_lex(); 516 return; 517 } 518 if (!db_expression(&args[nargs])) { 519 db_printf("Argument missing\n"); 520 db_flush_lex(); 521 return; 522 } 523 nargs++; 524 } 525 db_unread_token(t); 526 } 527 if (db_read_token() != tRPAREN) { 528 db_printf("?\n"); 529 db_flush_lex(); 530 return; 531 } 532 } 533 db_skip_to_eol(); 534 535 while (nargs < MAXARGS) { 536 args[nargs++] = 0; 537 } 538 539 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 540 args[5], args[6], args[7], args[8], args[9]); 541 db_printf("%#ln\n", retval); 542 } 543 544 void 545 db_reboot_cmd(addr, have_addr, count, modif) 546 db_expr_t addr; 547 int have_addr; 548 db_expr_t count; 549 char * modif; 550 { 551 db_expr_t bootflags; 552 553 /* Flags, default to RB_AUTOBOOT */ 554 if (!db_expression(&bootflags)) 555 bootflags = (db_expr_t)RB_AUTOBOOT; 556 if (db_read_token() != tEOL) { 557 db_error("?\n"); 558 /*NOTREACHED*/ 559 } 560 cpu_reboot((int)bootflags, NULL); 561 } 562
Indexes created Mon Sep 22 21:09:42 GMT 2025