db_command.c revision 1.28
1 /* $NetBSD: db_command.c,v 1.28 1999/03/24 05:51:20 mrg 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_ddb.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 #include <uvm/uvm_extern.h> 55 #include <uvm/uvm_ddb.h> 56 57 /* 58 * Exported global variables 59 */ 60 boolean_t db_cmd_loop_done; 61 label_t *db_recover; 62 63 /* 64 * if 'ed' style: 'dot' is set at start of last item printed, 65 * and '+' points to next line. 66 * Otherwise: 'dot' points to next item, '..' points to last. 67 */ 68 boolean_t db_ed_style = TRUE; 69 70 /* 71 * Utility routine - discard tokens through end-of-line. 72 */ 73 void 74 db_skip_to_eol() 75 { 76 int t; 77 do { 78 t = db_read_token(); 79 } while (t != tEOL); 80 } 81 82 /* 83 * Results of command search. 84 */ 85 #define CMD_UNIQUE 0 86 #define CMD_FOUND 1 87 #define CMD_NONE 2 88 #define CMD_AMBIGUOUS 3 89 #define CMD_HELP 4 90 91 /* 92 * Search for command prefix. 93 */ 94 int 95 db_cmd_search(name, table, cmdp) 96 char *name; 97 struct db_command *table; 98 struct db_command **cmdp; /* out */ 99 { 100 struct db_command *cmd; 101 int result = CMD_NONE; 102 103 for (cmd = table; cmd->name != 0; cmd++) { 104 register char *lp; 105 register char *rp; 106 register int c; 107 108 lp = name; 109 rp = cmd->name; 110 while ((c = *lp) == *rp) { 111 if (c == 0) { 112 /* complete match */ 113 *cmdp = cmd; 114 return (CMD_UNIQUE); 115 } 116 lp++; 117 rp++; 118 } 119 if (c == 0) { 120 /* end of name, not end of command - 121 partial match */ 122 if (result == CMD_FOUND) { 123 result = CMD_AMBIGUOUS; 124 /* but keep looking for a full match - 125 this lets us match single letters */ 126 } 127 else { 128 *cmdp = cmd; 129 result = CMD_FOUND; 130 } 131 } 132 } 133 if (result == CMD_NONE) { 134 /* check for 'help' */ 135 if (name[0] == 'h' && name[1] == 'e' 136 && name[2] == 'l' && name[3] == 'p') 137 result = CMD_HELP; 138 } 139 return (result); 140 } 141 142 void 143 db_cmd_list(table) 144 struct db_command *table; 145 { 146 register struct db_command *cmd; 147 148 for (cmd = table; cmd->name != 0; cmd++) { 149 db_printf("%-12s", cmd->name); 150 db_end_line(); 151 } 152 } 153 154 void 155 db_command(last_cmdp, cmd_table) 156 struct db_command **last_cmdp; /* IN_OUT */ 157 struct db_command *cmd_table; 158 { 159 struct db_command *cmd; 160 int t; 161 char modif[TOK_STRING_SIZE]; 162 db_expr_t addr, count; 163 boolean_t have_addr = FALSE; 164 int result; 165 166 t = db_read_token(); 167 if (t == tEOL) { 168 /* empty line repeats last command, at 'next' */ 169 cmd = *last_cmdp; 170 addr = (db_expr_t)db_next; 171 have_addr = FALSE; 172 count = 1; 173 modif[0] = '\0'; 174 } 175 else if (t == tEXCL) { 176 db_fncall(0, 0, 0, NULL); 177 return; 178 } 179 else if (t != tIDENT) { 180 db_printf("?\n"); 181 db_flush_lex(); 182 return; 183 } 184 else { 185 /* 186 * Search for command 187 */ 188 while (cmd_table) { 189 result = db_cmd_search(db_tok_string, 190 cmd_table, 191 &cmd); 192 switch (result) { 193 case CMD_NONE: 194 db_printf("No such command\n"); 195 db_flush_lex(); 196 return; 197 case CMD_AMBIGUOUS: 198 db_printf("Ambiguous\n"); 199 db_flush_lex(); 200 return; 201 case CMD_HELP: 202 db_cmd_list(cmd_table); 203 db_flush_lex(); 204 return; 205 default: 206 break; 207 } 208 if ((cmd_table = cmd->more) != 0) { 209 t = db_read_token(); 210 if (t != tIDENT) { 211 db_cmd_list(cmd_table); 212 db_flush_lex(); 213 return; 214 } 215 } 216 } 217 218 if ((cmd->flag & CS_OWN) == 0) { 219 /* 220 * Standard syntax: 221 * command [/modifier] [addr] [,count] 222 */ 223 t = db_read_token(); 224 if (t == tSLASH) { 225 t = db_read_token(); 226 if (t != tIDENT) { 227 db_printf("Bad modifier\n"); 228 db_flush_lex(); 229 return; 230 } 231 db_strcpy(modif, db_tok_string); 232 } 233 else { 234 db_unread_token(t); 235 modif[0] = '\0'; 236 } 237 238 if (db_expression(&addr)) { 239 db_dot = (db_addr_t) addr; 240 db_last_addr = db_dot; 241 have_addr = TRUE; 242 } 243 else { 244 addr = (db_expr_t) db_dot; 245 have_addr = FALSE; 246 } 247 t = db_read_token(); 248 if (t == tCOMMA) { 249 if (!db_expression(&count)) { 250 db_printf("Count missing\n"); 251 db_flush_lex(); 252 return; 253 } 254 } 255 else { 256 db_unread_token(t); 257 count = -1; 258 } 259 if ((cmd->flag & CS_MORE) == 0) { 260 db_skip_to_eol(); 261 } 262 } 263 } 264 *last_cmdp = cmd; 265 if (cmd != 0) { 266 /* 267 * Execute the command. 268 */ 269 (*cmd->fcn)(addr, have_addr, count, modif); 270 271 if (cmd->flag & CS_SET_DOT) { 272 /* 273 * If command changes dot, set dot to 274 * previous address displayed (if 'ed' style). 275 */ 276 if (db_ed_style) { 277 db_dot = db_prev; 278 } 279 else { 280 db_dot = db_next; 281 } 282 } 283 else { 284 /* 285 * If command does not change dot, 286 * set 'next' location to be the same. 287 */ 288 db_next = db_dot; 289 } 290 } 291 } 292 293 /*ARGSUSED*/ 294 void 295 db_map_print_cmd(addr, have_addr, count, modif) 296 db_expr_t addr; 297 int have_addr; 298 db_expr_t count; 299 char * modif; 300 { 301 boolean_t full = FALSE; 302 303 if (modif[0] == 'f') 304 full = TRUE; 305 306 uvm_map_printit((vm_map_t) addr, full, db_printf); 307 } 308 309 /*ARGSUSED*/ 310 void 311 db_object_print_cmd(addr, have_addr, count, modif) 312 db_expr_t addr; 313 int have_addr; 314 db_expr_t count; 315 char * modif; 316 { 317 boolean_t full = FALSE; 318 319 if (modif[0] == 'f') 320 full = TRUE; 321 322 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 323 } 324 325 /*ARGSUSED*/ 326 void 327 db_page_print_cmd(addr, have_addr, count, modif) 328 db_expr_t addr; 329 int have_addr; 330 db_expr_t count; 331 char * modif; 332 { 333 boolean_t full = FALSE; 334 335 if (modif[0] == 'f') 336 full = TRUE; 337 338 uvm_page_printit((struct vm_page *) addr, full, db_printf); 339 } 340 341 /* 342 * 'show' commands 343 */ 344 345 struct db_command db_show_all_cmds[] = { 346 { "procs", db_show_all_procs, 0, NULL }, 347 { "callout", db_show_callout, 0, NULL }, 348 { NULL, NULL, 0, NULL } 349 }; 350 351 struct db_command db_show_cmds[] = { 352 { "all", NULL, 0, db_show_all_cmds }, 353 { "registers", db_show_regs, 0, NULL }, 354 { "breaks", db_listbreak_cmd, 0, NULL }, 355 { "watches", db_listwatch_cmd, 0, NULL }, 356 { "map", db_map_print_cmd, 0, NULL }, 357 { "object", db_object_print_cmd, 0, NULL }, 358 { "page", db_page_print_cmd, 0, NULL }, 359 { NULL, NULL, 0, NULL, } 360 }; 361 362 struct db_command db_command_table[] = { 363 #ifdef DB_MACHINE_COMMANDS 364 /* this must be the first entry, if it exists */ 365 { "machine", NULL, 0, NULL}, 366 #endif 367 { "print", db_print_cmd, 0, NULL }, 368 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 369 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 370 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 371 { "set", db_set_cmd, CS_OWN, NULL }, 372 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 373 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 374 { "delete", db_delete_cmd, 0, NULL }, 375 { "d", db_delete_cmd, 0, NULL }, 376 { "break", db_breakpoint_cmd, 0, NULL }, 377 { "dwatch", db_deletewatch_cmd, 0, NULL }, 378 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 379 { "step", db_single_step_cmd, 0, NULL }, 380 { "s", db_single_step_cmd, 0, NULL }, 381 { "continue", db_continue_cmd, 0, NULL }, 382 { "c", db_continue_cmd, 0, NULL }, 383 { "until", db_trace_until_call_cmd,0, NULL }, 384 { "next", db_trace_until_matching_cmd,0, NULL }, 385 { "match", db_trace_until_matching_cmd,0, NULL }, 386 { "trace", db_stack_trace_cmd, 0, NULL }, 387 { "call", db_fncall, CS_OWN, NULL }, 388 { "ps", db_show_all_procs, 0, NULL }, 389 { "kill", db_kill_proc, CS_OWN, NULL }, 390 { "callout", db_show_callout, 0, NULL }, 391 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 392 { "show", NULL, 0, db_show_cmds }, 393 { NULL, NULL, 0, NULL } 394 }; 395 396 #ifdef DB_MACHINE_COMMANDS 397 398 /* this function should be called to install the machine dependent 399 commands. It should be called before the debugger is enabled */ 400 void db_machine_commands_install(ptr) 401 struct db_command *ptr; 402 { 403 db_command_table[0].more = ptr; 404 return; 405 } 406 407 #endif 408 409 struct db_command *db_last_command = 0; 410 411 void 412 db_help_cmd() 413 { 414 struct db_command *cmd = db_command_table; 415 416 while (cmd->name != 0) { 417 db_printf("%-12s", cmd->name); 418 db_end_line(); 419 cmd++; 420 } 421 } 422 423 void 424 db_command_loop() 425 { 426 label_t db_jmpbuf; 427 label_t *savejmp; 428 extern int db_output_line; 429 430 /* 431 * Initialize 'prev' and 'next' to dot. 432 */ 433 db_prev = db_dot; 434 db_next = db_dot; 435 436 db_cmd_loop_done = 0; 437 438 savejmp = db_recover; 439 db_recover = &db_jmpbuf; 440 (void) setjmp(&db_jmpbuf); 441 442 while (!db_cmd_loop_done) { 443 if (db_print_position() != 0) 444 db_printf("\n"); 445 db_output_line = 0; 446 447 db_printf("db> "); 448 (void) db_read_line(); 449 450 db_command(&db_last_command, db_command_table); 451 } 452 453 db_recover = savejmp; 454 } 455 456 void 457 db_error(s) 458 char *s; 459 { 460 if (s) 461 db_printf(s); 462 db_flush_lex(); 463 longjmp(db_recover); 464 } 465 466 467 /* 468 * Call random function: 469 * !expr(arg,arg,arg) 470 */ 471 /*ARGSUSED*/ 472 void 473 db_fncall(addr, have_addr, count, modif) 474 db_expr_t addr; 475 int have_addr; 476 db_expr_t count; 477 char * modif; 478 { 479 db_expr_t fn_addr; 480 #define MAXARGS 11 481 db_expr_t args[MAXARGS]; 482 int nargs = 0; 483 db_expr_t retval; 484 db_expr_t (*func) __P((db_expr_t, ...)); 485 int t; 486 487 if (!db_expression(&fn_addr)) { 488 db_printf("Bad function\n"); 489 db_flush_lex(); 490 return; 491 } 492 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 493 494 t = db_read_token(); 495 if (t == tLPAREN) { 496 if (db_expression(&args[0])) { 497 nargs++; 498 while ((t = db_read_token()) == tCOMMA) { 499 if (nargs == MAXARGS) { 500 db_printf("Too many arguments\n"); 501 db_flush_lex(); 502 return; 503 } 504 if (!db_expression(&args[nargs])) { 505 db_printf("Argument missing\n"); 506 db_flush_lex(); 507 return; 508 } 509 nargs++; 510 } 511 db_unread_token(t); 512 } 513 if (db_read_token() != tRPAREN) { 514 db_printf("?\n"); 515 db_flush_lex(); 516 return; 517 } 518 } 519 db_skip_to_eol(); 520 521 while (nargs < MAXARGS) { 522 args[nargs++] = 0; 523 } 524 525 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 526 args[5], args[6], args[7], args[8], args[9]); 527 db_printf("%#ln\n", retval); 528 } 529 530 void 531 db_reboot_cmd(addr, have_addr, count, modif) 532 db_expr_t addr; 533 int have_addr; 534 db_expr_t count; 535 char * modif; 536 { 537 db_expr_t bootflags; 538 539 /* Flags, default to RB_AUTOBOOT */ 540 if (!db_expression(&bootflags)) 541 bootflags = (db_expr_t)RB_AUTOBOOT; 542 if (db_read_token() != tEOL) { 543 db_error("?\n"); 544 /*NOTREACHED*/ 545 } 546 cpu_reboot((int)bootflags, NULL); 547 } 548
Indexes created Tue Sep 30 11:09:46 GMT 2025