db_command.c revision 1.27
1 /* $NetBSD: db_command.c,v 1.27 1998/07/05 14:33:56 tron 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 #include "opt_uvm.h" 31 32 /* 33 * Command dispatcher. 34 */ 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/reboot.h> 38 #include <sys/proc.h> 39 40 #include <machine/db_machdep.h> /* type definitions */ 41 42 #include <ddb/db_lex.h> 43 #include <ddb/db_output.h> 44 #include <ddb/db_command.h> 45 #include <ddb/db_break.h> 46 #include <ddb/db_watch.h> 47 #include <ddb/db_run.h> 48 #include <ddb/db_variables.h> 49 #include <ddb/db_interface.h> 50 #include <ddb/db_sym.h> 51 #include <ddb/db_extern.h> 52 53 #include <vm/vm.h> 54 55 #if defined(UVM) 56 #include <uvm/uvm_extern.h> 57 #include <uvm/uvm_ddb.h> 58 #endif 59 60 /* 61 * Exported global variables 62 */ 63 boolean_t db_cmd_loop_done; 64 label_t *db_recover; 65 66 /* 67 * if 'ed' style: 'dot' is set at start of last item printed, 68 * and '+' points to next line. 69 * Otherwise: 'dot' points to next item, '..' points to last. 70 */ 71 boolean_t db_ed_style = TRUE; 72 73 /* 74 * Utility routine - discard tokens through end-of-line. 75 */ 76 void 77 db_skip_to_eol() 78 { 79 int t; 80 do { 81 t = db_read_token(); 82 } while (t != tEOL); 83 } 84 85 /* 86 * Results of command search. 87 */ 88 #define CMD_UNIQUE 0 89 #define CMD_FOUND 1 90 #define CMD_NONE 2 91 #define CMD_AMBIGUOUS 3 92 #define CMD_HELP 4 93 94 /* 95 * Search for command prefix. 96 */ 97 int 98 db_cmd_search(name, table, cmdp) 99 char *name; 100 struct db_command *table; 101 struct db_command **cmdp; /* out */ 102 { 103 struct db_command *cmd; 104 int result = CMD_NONE; 105 106 for (cmd = table; cmd->name != 0; cmd++) { 107 register char *lp; 108 register char *rp; 109 register int c; 110 111 lp = name; 112 rp = cmd->name; 113 while ((c = *lp) == *rp) { 114 if (c == 0) { 115 /* complete match */ 116 *cmdp = cmd; 117 return (CMD_UNIQUE); 118 } 119 lp++; 120 rp++; 121 } 122 if (c == 0) { 123 /* end of name, not end of command - 124 partial match */ 125 if (result == CMD_FOUND) { 126 result = CMD_AMBIGUOUS; 127 /* but keep looking for a full match - 128 this lets us match single letters */ 129 } 130 else { 131 *cmdp = cmd; 132 result = CMD_FOUND; 133 } 134 } 135 } 136 if (result == CMD_NONE) { 137 /* check for 'help' */ 138 if (name[0] == 'h' && name[1] == 'e' 139 && name[2] == 'l' && name[3] == 'p') 140 result = CMD_HELP; 141 } 142 return (result); 143 } 144 145 void 146 db_cmd_list(table) 147 struct db_command *table; 148 { 149 register struct db_command *cmd; 150 151 for (cmd = table; cmd->name != 0; cmd++) { 152 db_printf("%-12s", cmd->name); 153 db_end_line(); 154 } 155 } 156 157 void 158 db_command(last_cmdp, cmd_table) 159 struct db_command **last_cmdp; /* IN_OUT */ 160 struct db_command *cmd_table; 161 { 162 struct db_command *cmd; 163 int t; 164 char modif[TOK_STRING_SIZE]; 165 db_expr_t addr, count; 166 boolean_t have_addr = FALSE; 167 int result; 168 169 t = db_read_token(); 170 if (t == tEOL) { 171 /* empty line repeats last command, at 'next' */ 172 cmd = *last_cmdp; 173 addr = (db_expr_t)db_next; 174 have_addr = FALSE; 175 count = 1; 176 modif[0] = '\0'; 177 } 178 else if (t == tEXCL) { 179 db_fncall(0, 0, 0, NULL); 180 return; 181 } 182 else if (t != tIDENT) { 183 db_printf("?\n"); 184 db_flush_lex(); 185 return; 186 } 187 else { 188 /* 189 * Search for command 190 */ 191 while (cmd_table) { 192 result = db_cmd_search(db_tok_string, 193 cmd_table, 194 &cmd); 195 switch (result) { 196 case CMD_NONE: 197 db_printf("No such command\n"); 198 db_flush_lex(); 199 return; 200 case CMD_AMBIGUOUS: 201 db_printf("Ambiguous\n"); 202 db_flush_lex(); 203 return; 204 case CMD_HELP: 205 db_cmd_list(cmd_table); 206 db_flush_lex(); 207 return; 208 default: 209 break; 210 } 211 if ((cmd_table = cmd->more) != 0) { 212 t = db_read_token(); 213 if (t != tIDENT) { 214 db_cmd_list(cmd_table); 215 db_flush_lex(); 216 return; 217 } 218 } 219 } 220 221 if ((cmd->flag & CS_OWN) == 0) { 222 /* 223 * Standard syntax: 224 * command [/modifier] [addr] [,count] 225 */ 226 t = db_read_token(); 227 if (t == tSLASH) { 228 t = db_read_token(); 229 if (t != tIDENT) { 230 db_printf("Bad modifier\n"); 231 db_flush_lex(); 232 return; 233 } 234 db_strcpy(modif, db_tok_string); 235 } 236 else { 237 db_unread_token(t); 238 modif[0] = '\0'; 239 } 240 241 if (db_expression(&addr)) { 242 db_dot = (db_addr_t) addr; 243 db_last_addr = db_dot; 244 have_addr = TRUE; 245 } 246 else { 247 addr = (db_expr_t) db_dot; 248 have_addr = FALSE; 249 } 250 t = db_read_token(); 251 if (t == tCOMMA) { 252 if (!db_expression(&count)) { 253 db_printf("Count missing\n"); 254 db_flush_lex(); 255 return; 256 } 257 } 258 else { 259 db_unread_token(t); 260 count = -1; 261 } 262 if ((cmd->flag & CS_MORE) == 0) { 263 db_skip_to_eol(); 264 } 265 } 266 } 267 *last_cmdp = cmd; 268 if (cmd != 0) { 269 /* 270 * Execute the command. 271 */ 272 (*cmd->fcn)(addr, have_addr, count, modif); 273 274 if (cmd->flag & CS_SET_DOT) { 275 /* 276 * If command changes dot, set dot to 277 * previous address displayed (if 'ed' style). 278 */ 279 if (db_ed_style) { 280 db_dot = db_prev; 281 } 282 else { 283 db_dot = db_next; 284 } 285 } 286 else { 287 /* 288 * If command does not change dot, 289 * set 'next' location to be the same. 290 */ 291 db_next = db_dot; 292 } 293 } 294 } 295 296 /*ARGSUSED*/ 297 void 298 db_map_print_cmd(addr, have_addr, count, modif) 299 db_expr_t addr; 300 int have_addr; 301 db_expr_t count; 302 char * modif; 303 { 304 boolean_t full = FALSE; 305 306 if (modif[0] == 'f') 307 full = TRUE; 308 309 #if defined(UVM) 310 uvm_map_printit((vm_map_t) addr, full, db_printf); 311 #else 312 _vm_map_print((vm_map_t) addr, full, db_printf); 313 #endif 314 } 315 316 /*ARGSUSED*/ 317 void 318 db_object_print_cmd(addr, have_addr, count, modif) 319 db_expr_t addr; 320 int have_addr; 321 db_expr_t count; 322 char * modif; 323 { 324 boolean_t full = FALSE; 325 326 if (modif[0] == 'f') 327 full = TRUE; 328 329 #if defined(UVM) 330 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 331 #else 332 _vm_object_print((vm_object_t) addr, full, db_printf); 333 #endif 334 } 335 336 /*ARGSUSED*/ 337 void 338 db_page_print_cmd(addr, have_addr, count, modif) 339 db_expr_t addr; 340 int have_addr; 341 db_expr_t count; 342 char * modif; 343 { 344 boolean_t full = FALSE; 345 346 if (modif[0] == 'f') 347 full = TRUE; 348 349 #if defined(UVM) 350 uvm_page_printit((struct vm_page *) addr, full, db_printf); 351 #else 352 printf("only supported by UVM\n"); 353 #endif 354 } 355 356 /* 357 * 'show' commands 358 */ 359 360 struct db_command db_show_all_cmds[] = { 361 { "procs", db_show_all_procs, 0, NULL }, 362 { "callout", db_show_callout, 0, NULL }, 363 { NULL, NULL, 0, NULL } 364 }; 365 366 struct db_command db_show_cmds[] = { 367 { "all", NULL, 0, db_show_all_cmds }, 368 { "registers", db_show_regs, 0, NULL }, 369 { "breaks", db_listbreak_cmd, 0, NULL }, 370 { "watches", db_listwatch_cmd, 0, NULL }, 371 { "map", db_map_print_cmd, 0, NULL }, 372 { "object", db_object_print_cmd, 0, NULL }, 373 { "page", db_page_print_cmd, 0, NULL }, 374 { NULL, NULL, 0, NULL, } 375 }; 376 377 struct db_command db_command_table[] = { 378 #ifdef DB_MACHINE_COMMANDS 379 /* this must be the first entry, if it exists */ 380 { "machine", NULL, 0, NULL}, 381 #endif 382 { "print", db_print_cmd, 0, NULL }, 383 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 384 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 385 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 386 { "set", db_set_cmd, CS_OWN, NULL }, 387 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 388 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 389 { "delete", db_delete_cmd, 0, NULL }, 390 { "d", db_delete_cmd, 0, NULL }, 391 { "break", db_breakpoint_cmd, 0, NULL }, 392 { "dwatch", db_deletewatch_cmd, 0, NULL }, 393 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 394 { "step", db_single_step_cmd, 0, NULL }, 395 { "s", db_single_step_cmd, 0, NULL }, 396 { "continue", db_continue_cmd, 0, NULL }, 397 { "c", db_continue_cmd, 0, NULL }, 398 { "until", db_trace_until_call_cmd,0, NULL }, 399 { "next", db_trace_until_matching_cmd,0, NULL }, 400 { "match", db_trace_until_matching_cmd,0, NULL }, 401 { "trace", db_stack_trace_cmd, 0, NULL }, 402 { "call", db_fncall, CS_OWN, NULL }, 403 { "ps", db_show_all_procs, 0, NULL }, 404 { "kill", db_kill_proc, CS_OWN, NULL }, 405 { "callout", db_show_callout, 0, NULL }, 406 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 407 { "show", NULL, 0, db_show_cmds }, 408 { NULL, NULL, 0, NULL } 409 }; 410 411 #ifdef DB_MACHINE_COMMANDS 412 413 /* this function should be called to install the machine dependent 414 commands. It should be called before the debugger is enabled */ 415 void db_machine_commands_install(ptr) 416 struct db_command *ptr; 417 { 418 db_command_table[0].more = ptr; 419 return; 420 } 421 422 #endif 423 424 struct db_command *db_last_command = 0; 425 426 void 427 db_help_cmd() 428 { 429 struct db_command *cmd = db_command_table; 430 431 while (cmd->name != 0) { 432 db_printf("%-12s", cmd->name); 433 db_end_line(); 434 cmd++; 435 } 436 } 437 438 void 439 db_command_loop() 440 { 441 label_t db_jmpbuf; 442 label_t *savejmp; 443 extern int db_output_line; 444 445 /* 446 * Initialize 'prev' and 'next' to dot. 447 */ 448 db_prev = db_dot; 449 db_next = db_dot; 450 451 db_cmd_loop_done = 0; 452 453 savejmp = db_recover; 454 db_recover = &db_jmpbuf; 455 (void) setjmp(&db_jmpbuf); 456 457 while (!db_cmd_loop_done) { 458 if (db_print_position() != 0) 459 db_printf("\n"); 460 db_output_line = 0; 461 462 db_printf("db> "); 463 (void) db_read_line(); 464 465 db_command(&db_last_command, db_command_table); 466 } 467 468 db_recover = savejmp; 469 } 470 471 void 472 db_error(s) 473 char *s; 474 { 475 if (s) 476 db_printf(s); 477 db_flush_lex(); 478 longjmp(db_recover); 479 } 480 481 482 /* 483 * Call random function: 484 * !expr(arg,arg,arg) 485 */ 486 /*ARGSUSED*/ 487 void 488 db_fncall(addr, have_addr, count, modif) 489 db_expr_t addr; 490 int have_addr; 491 db_expr_t count; 492 char * modif; 493 { 494 db_expr_t fn_addr; 495 #define MAXARGS 11 496 db_expr_t args[MAXARGS]; 497 int nargs = 0; 498 db_expr_t retval; 499 db_expr_t (*func) __P((db_expr_t, ...)); 500 int t; 501 502 if (!db_expression(&fn_addr)) { 503 db_printf("Bad function\n"); 504 db_flush_lex(); 505 return; 506 } 507 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 508 509 t = db_read_token(); 510 if (t == tLPAREN) { 511 if (db_expression(&args[0])) { 512 nargs++; 513 while ((t = db_read_token()) == tCOMMA) { 514 if (nargs == MAXARGS) { 515 db_printf("Too many arguments\n"); 516 db_flush_lex(); 517 return; 518 } 519 if (!db_expression(&args[nargs])) { 520 db_printf("Argument missing\n"); 521 db_flush_lex(); 522 return; 523 } 524 nargs++; 525 } 526 db_unread_token(t); 527 } 528 if (db_read_token() != tRPAREN) { 529 db_printf("?\n"); 530 db_flush_lex(); 531 return; 532 } 533 } 534 db_skip_to_eol(); 535 536 while (nargs < MAXARGS) { 537 args[nargs++] = 0; 538 } 539 540 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 541 args[5], args[6], args[7], args[8], args[9]); 542 db_printf("%#ln\n", retval); 543 } 544 545 void 546 db_reboot_cmd(addr, have_addr, count, modif) 547 db_expr_t addr; 548 int have_addr; 549 db_expr_t count; 550 char * modif; 551 { 552 db_expr_t bootflags; 553 554 /* Flags, default to RB_AUTOBOOT */ 555 if (!db_expression(&bootflags)) 556 bootflags = (db_expr_t)RB_AUTOBOOT; 557 if (db_read_token() != tEOL) { 558 db_error("?\n"); 559 /*NOTREACHED*/ 560 } 561 cpu_reboot((int)bootflags, NULL); 562 } 563
Indexes created Tue Sep 30 07:10:03 GMT 2025