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1.1 ! root 1: /* ! 2: * Mach Operating System ! 3: * Copyright (c) 1991,1990 Carnegie Mellon University ! 4: * All Rights Reserved. ! 5: * ! 6: * Permission to use, copy, modify and distribute this software and its ! 7: * documentation is hereby granted, provided that both the copyright ! 8: * notice and this permission notice appear in all copies of the ! 9: * software, derivative works or modified versions, and any portions ! 10: * thereof, and that both notices appear in supporting documentation. ! 11: * ! 12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS ! 13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR ! 14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. ! 15: * ! 16: * Carnegie Mellon requests users of this software to return to ! 17: * ! 18: * Software Distribution Coordinator or [email protected] ! 19: * School of Computer Science ! 20: * Carnegie Mellon University ! 21: * Pittsburgh PA 15213-3890 ! 22: * ! 23: * any improvements or extensions that they make and grant Carnegie the ! 24: * rights to redistribute these changes. ! 25: */ ! 26: /* ! 27: * HISTORY ! 28: * $Log: db_command.c,v $ ! 29: * Revision 1.1 1992/03/25 21:45:02 pace ! 30: * Initial revision ! 31: * ! 32: * Revision 2.6 91/02/05 17:06:10 mrt ! 33: * Changed to new Mach copyright ! 34: * [91/01/31 16:17:18 mrt] ! 35: * ! 36: * Revision 2.5 91/01/08 17:31:54 rpd ! 37: * Forward reference for db_fncall(); ! 38: * [91/01/04 12:35:17 rvb] ! 39: * ! 40: * Add call as a synonym for ! and match for next ! 41: * [91/01/04 12:14:48 rvb] ! 42: * ! 43: * Revision 2.4 90/11/07 16:49:15 rpd ! 44: * Added search. ! 45: * [90/11/06 rpd] ! 46: * ! 47: * Revision 2.3 90/10/25 14:43:45 rwd ! 48: * Changed db_fncall to print the result unsigned. ! 49: * [90/10/19 rpd] ! 50: * ! 51: * Added CS_MORE to db_watchpoint_cmd. ! 52: * [90/10/17 rpd] ! 53: * Added watchpoint commands: watch, dwatch, show watches. ! 54: * [90/10/16 rpd] ! 55: * ! 56: * Revision 2.2 90/08/27 21:50:10 dbg ! 57: * Remove 'listbreaks' - use 'show breaks' instead. Change 'show ! 58: * threads' to 'show all threads' to avoid clash with 'show thread'. ! 59: * Set 'dot' here from db_prev or db_next, depending on 'db_ed_style' ! 60: * flag and syntax table. ! 61: * [90/08/22 dbg] ! 62: * Reduce lint. ! 63: * [90/08/07 dbg] ! 64: * Created. ! 65: * [90/07/25 dbg] ! 66: * ! 67: */ ! 68: /* ! 69: * Author: David B. Golub, Carnegie Mellon University ! 70: * Date: 7/90 ! 71: */ ! 72: /* ! 73: * Command dispatcher. ! 74: */ ! 75: #include "param.h" ! 76: #include "proc.h" ! 77: #include <machine/db_machdep.h> /* type definitions */ ! 78: ! 79: #include <ddb/db_lex.h> ! 80: #include <ddb/db_output.h> ! 81: ! 82: #include <setjmp.h> ! 83: ! 84: /* ! 85: * Exported global variables ! 86: */ ! 87: boolean_t db_cmd_loop_done; ! 88: jmp_buf db_jmpbuf; ! 89: db_addr_t db_dot; ! 90: db_addr_t db_last_addr; ! 91: db_addr_t db_prev; ! 92: db_addr_t db_next; ! 93: ! 94: /* ! 95: * if 'ed' style: 'dot' is set at start of last item printed, ! 96: * and '+' points to next line. ! 97: * Otherwise: 'dot' points to next item, '..' points to last. ! 98: */ ! 99: boolean_t db_ed_style = TRUE; ! 100: ! 101: ! 102: /* ! 103: * Utility routine - discard tokens through end-of-line. ! 104: */ ! 105: void ! 106: db_skip_to_eol() ! 107: { ! 108: int t; ! 109: do { ! 110: t = db_read_token(); ! 111: } while (t != tEOL); ! 112: } ! 113: ! 114: /* ! 115: * Command table ! 116: */ ! 117: struct command { ! 118: char * name; /* command name */ ! 119: void (*fcn)(); /* function to call */ ! 120: int flag; /* extra info: */ ! 121: #define CS_OWN 0x1 /* non-standard syntax */ ! 122: #define CS_MORE 0x2 /* standard syntax, but may have other ! 123: words at end */ ! 124: #define CS_SET_DOT 0x100 /* set dot after command */ ! 125: struct command *more; /* another level of command */ ! 126: }; ! 127: ! 128: /* ! 129: * Results of command search. ! 130: */ ! 131: #define CMD_UNIQUE 0 ! 132: #define CMD_FOUND 1 ! 133: #define CMD_NONE 2 ! 134: #define CMD_AMBIGUOUS 3 ! 135: #define CMD_HELP 4 ! 136: ! 137: /* ! 138: * Search for command prefix. ! 139: */ ! 140: int ! 141: db_cmd_search(name, table, cmdp) ! 142: char * name; ! 143: struct command *table; ! 144: struct command **cmdp; /* out */ ! 145: { ! 146: struct command *cmd; ! 147: int result = CMD_NONE; ! 148: ! 149: for (cmd = table; cmd->name != 0; cmd++) { ! 150: register char *lp; ! 151: register char *rp; ! 152: register int c; ! 153: ! 154: lp = name; ! 155: rp = cmd->name; ! 156: while ((c = *lp) == *rp) { ! 157: if (c == 0) { ! 158: /* complete match */ ! 159: *cmdp = cmd; ! 160: return (CMD_UNIQUE); ! 161: } ! 162: lp++; ! 163: rp++; ! 164: } ! 165: if (c == 0) { ! 166: /* end of name, not end of command - ! 167: partial match */ ! 168: if (result == CMD_FOUND) { ! 169: result = CMD_AMBIGUOUS; ! 170: /* but keep looking for a full match - ! 171: this lets us match single letters */ ! 172: } ! 173: else { ! 174: *cmdp = cmd; ! 175: result = CMD_FOUND; ! 176: } ! 177: } ! 178: } ! 179: if (result == CMD_NONE) { ! 180: /* check for 'help' */ ! 181: if (name[0] == 'h' && name[1] == 'e' ! 182: && name[2] == 'l' && name[3] == 'p') ! 183: result = CMD_HELP; ! 184: } ! 185: return (result); ! 186: } ! 187: ! 188: void ! 189: db_cmd_list(table) ! 190: struct command *table; ! 191: { ! 192: register struct command *cmd; ! 193: ! 194: for (cmd = table; cmd->name != 0; cmd++) { ! 195: db_printf("%-12s", cmd->name); ! 196: db_end_line(); ! 197: } ! 198: } ! 199: ! 200: void ! 201: db_command(last_cmdp, cmd_table) ! 202: struct command **last_cmdp; /* IN_OUT */ ! 203: struct command *cmd_table; ! 204: { ! 205: struct command *cmd; ! 206: int t; ! 207: char modif[TOK_STRING_SIZE]; ! 208: db_expr_t addr, count; ! 209: boolean_t have_addr; ! 210: int result; ! 211: ! 212: t = db_read_token(); ! 213: if (t == tEOL) { ! 214: /* empty line repeats last command, at 'next' */ ! 215: cmd = *last_cmdp; ! 216: addr = (db_expr_t)db_next; ! 217: have_addr = FALSE; ! 218: count = 1; ! 219: modif[0] = '\0'; ! 220: } ! 221: else if (t == tEXCL) { ! 222: void db_fncall(); ! 223: db_fncall(); ! 224: return; ! 225: } ! 226: else if (t != tIDENT) { ! 227: db_printf("?\n"); ! 228: db_flush_lex(); ! 229: return; ! 230: } ! 231: else { ! 232: /* ! 233: * Search for command ! 234: */ ! 235: while (cmd_table) { ! 236: result = db_cmd_search(db_tok_string, ! 237: cmd_table, ! 238: &cmd); ! 239: switch (result) { ! 240: case CMD_NONE: ! 241: db_printf("No such command\n"); ! 242: db_flush_lex(); ! 243: return; ! 244: case CMD_AMBIGUOUS: ! 245: db_printf("Ambiguous\n"); ! 246: db_flush_lex(); ! 247: return; ! 248: case CMD_HELP: ! 249: db_cmd_list(cmd_table); ! 250: db_flush_lex(); ! 251: return; ! 252: default: ! 253: break; ! 254: } ! 255: if ((cmd_table = cmd->more) != 0) { ! 256: t = db_read_token(); ! 257: if (t != tIDENT) { ! 258: db_cmd_list(cmd_table); ! 259: db_flush_lex(); ! 260: return; ! 261: } ! 262: } ! 263: } ! 264: ! 265: if ((cmd->flag & CS_OWN) == 0) { ! 266: /* ! 267: * Standard syntax: ! 268: * command [/modifier] [addr] [,count] ! 269: */ ! 270: t = db_read_token(); ! 271: if (t == tSLASH) { ! 272: t = db_read_token(); ! 273: if (t != tIDENT) { ! 274: db_printf("Bad modifier\n"); ! 275: db_flush_lex(); ! 276: return; ! 277: } ! 278: db_strcpy(modif, db_tok_string); ! 279: } ! 280: else { ! 281: db_unread_token(t); ! 282: modif[0] = '\0'; ! 283: } ! 284: ! 285: if (db_expression(&addr)) { ! 286: db_dot = (db_addr_t) addr; ! 287: db_last_addr = db_dot; ! 288: have_addr = TRUE; ! 289: } ! 290: else { ! 291: addr = (db_expr_t) db_dot; ! 292: have_addr = FALSE; ! 293: } ! 294: t = db_read_token(); ! 295: if (t == tCOMMA) { ! 296: if (!db_expression(&count)) { ! 297: db_printf("Count missing\n"); ! 298: db_flush_lex(); ! 299: return; ! 300: } ! 301: } ! 302: else { ! 303: db_unread_token(t); ! 304: count = -1; ! 305: } ! 306: if ((cmd->flag & CS_MORE) == 0) { ! 307: db_skip_to_eol(); ! 308: } ! 309: } ! 310: } ! 311: *last_cmdp = cmd; ! 312: if (cmd != 0) { ! 313: /* ! 314: * Execute the command. ! 315: */ ! 316: (*cmd->fcn)(addr, have_addr, count, modif); ! 317: ! 318: if (cmd->flag & CS_SET_DOT) { ! 319: /* ! 320: * If command changes dot, set dot to ! 321: * previous address displayed (if 'ed' style). ! 322: */ ! 323: if (db_ed_style) { ! 324: db_dot = db_prev; ! 325: } ! 326: else { ! 327: db_dot = db_next; ! 328: } ! 329: } ! 330: else { ! 331: /* ! 332: * If command does not change dot, ! 333: * set 'next' location to be the same. ! 334: */ ! 335: db_next = db_dot; ! 336: } ! 337: } ! 338: } ! 339: ! 340: /* ! 341: * 'show' commands ! 342: */ ! 343: extern void db_listbreak_cmd(); ! 344: extern void db_listwatch_cmd(); ! 345: extern void db_show_regs(), db_show_one_thread(), db_show_all_threads(); ! 346: extern void vm_map_print(), vm_object_print(), vm_page_print(); ! 347: extern void ipc_port_print(); ! 348: void db_show_help(); ! 349: ! 350: struct command db_show_all_cmds[] = { ! 351: #if 0 ! 352: { "threads", db_show_all_threads,0, 0 }, ! 353: #endif ! 354: { (char *)0 } ! 355: }; ! 356: ! 357: struct command db_show_cmds[] = { ! 358: { "all", 0, 0, db_show_all_cmds }, ! 359: { "registers", db_show_regs, 0, 0 }, ! 360: { "breaks", db_listbreak_cmd, 0, 0 }, ! 361: { "watches", db_listwatch_cmd, 0, 0 }, ! 362: #if 0 ! 363: { "thread", db_show_one_thread, 0, 0 }, ! 364: #endif ! 365: { "map", vm_map_print, 0, 0 }, ! 366: { "object", vm_object_print, 0, 0 }, ! 367: #if 0 ! 368: { "page", vm_page_print, 0, 0 }, ! 369: #endif ! 370: #if 0 ! 371: { "port", ipc_port_print, 0, 0 }, ! 372: #endif ! 373: { (char *)0, } ! 374: }; ! 375: ! 376: extern void db_print_cmd(), db_examine_cmd(), db_set_cmd(); ! 377: extern void db_search_cmd(); ! 378: extern void db_write_cmd(); ! 379: extern void db_delete_cmd(), db_breakpoint_cmd(); ! 380: extern void db_deletewatch_cmd(), db_watchpoint_cmd(); ! 381: extern void db_single_step_cmd(), db_trace_until_call_cmd(), ! 382: db_trace_until_matching_cmd(), db_continue_cmd(); ! 383: extern void db_stack_trace_cmd(); ! 384: void db_help_cmd(); ! 385: void db_fncall(); ! 386: ! 387: struct command db_command_table[] = { ! 388: { "print", db_print_cmd, 0, 0 }, ! 389: { "examine", db_examine_cmd, CS_SET_DOT, 0 }, ! 390: { "x", db_examine_cmd, CS_SET_DOT, 0 }, ! 391: { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, ! 392: { "set", db_set_cmd, CS_OWN, 0 }, ! 393: { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, ! 394: { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, ! 395: { "delete", db_delete_cmd, 0, 0 }, ! 396: { "d", db_delete_cmd, 0, 0 }, ! 397: { "break", db_breakpoint_cmd, 0, 0 }, ! 398: { "dwatch", db_deletewatch_cmd, 0, 0 }, ! 399: { "watch", db_watchpoint_cmd, CS_MORE,0 }, ! 400: { "step", db_single_step_cmd, 0, 0 }, ! 401: { "s", db_single_step_cmd, 0, 0 }, ! 402: { "continue", db_continue_cmd, 0, 0 }, ! 403: { "c", db_continue_cmd, 0, 0 }, ! 404: { "until", db_trace_until_call_cmd,0, 0 }, ! 405: { "next", db_trace_until_matching_cmd,0, 0 }, ! 406: { "match", db_trace_until_matching_cmd,0, 0 }, ! 407: { "trace", db_stack_trace_cmd, 0, 0 }, ! 408: { "call", db_fncall, CS_OWN, 0 }, ! 409: { "show", 0, 0, db_show_cmds }, ! 410: { (char *)0, } ! 411: }; ! 412: ! 413: struct command *db_last_command = 0; ! 414: ! 415: void ! 416: db_help_cmd() ! 417: { ! 418: struct command *cmd = db_command_table; ! 419: ! 420: while (cmd->name != 0) { ! 421: db_printf("%-12s", cmd->name); ! 422: db_end_line(); ! 423: cmd++; ! 424: } ! 425: } ! 426: ! 427: void ! 428: db_command_loop() ! 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: while (!db_cmd_loop_done) { ! 438: ! 439: (void) setjmp(db_jmpbuf); ! 440: if (db_print_position() != 0) ! 441: db_printf("\n"); ! 442: ! 443: db_printf("db> "); ! 444: (void) db_read_line(); ! 445: ! 446: db_command(&db_last_command, db_command_table); ! 447: } ! 448: } ! 449: ! 450: void ! 451: db_error(s) ! 452: char *s; ! 453: { ! 454: if (s) ! 455: db_printf(s); ! 456: db_flush_lex(); ! 457: longjmp(db_jmpbuf, 1); ! 458: } ! 459: ! 460: ! 461: /* ! 462: * Call random function: ! 463: * !expr(arg,arg,arg) ! 464: */ ! 465: void ! 466: db_fncall() ! 467: { ! 468: db_expr_t fn_addr; ! 469: #define MAXARGS 11 ! 470: db_expr_t args[MAXARGS]; ! 471: int nargs = 0; ! 472: db_expr_t retval; ! 473: db_expr_t (*func)(); ! 474: int t; ! 475: ! 476: if (!db_expression(&fn_addr)) { ! 477: db_printf("Bad function\n"); ! 478: db_flush_lex(); ! 479: return; ! 480: } ! 481: func = (db_expr_t (*) ()) fn_addr; ! 482: ! 483: t = db_read_token(); ! 484: if (t == tLPAREN) { ! 485: if (db_expression(&args[0])) { ! 486: nargs++; ! 487: while ((t = db_read_token()) == tCOMMA) { ! 488: if (nargs == MAXARGS) { ! 489: db_printf("Too many arguments\n"); ! 490: db_flush_lex(); ! 491: return; ! 492: } ! 493: if (!db_expression(&args[nargs])) { ! 494: db_printf("Argument missing\n"); ! 495: db_flush_lex(); ! 496: return; ! 497: } ! 498: nargs++; ! 499: } ! 500: db_unread_token(t); ! 501: } ! 502: if (db_read_token() != tRPAREN) { ! 503: db_printf("?\n"); ! 504: db_flush_lex(); ! 505: return; ! 506: } ! 507: } ! 508: db_skip_to_eol(); ! 509: ! 510: while (nargs < MAXARGS) { ! 511: args[nargs++] = 0; ! 512: } ! 513: ! 514: retval = (*func)(args[0], args[1], args[2], args[3], args[4], ! 515: args[5], args[6], args[7], args[8], args[9] ); ! 516: db_printf("%#n\n", retval); ! 517: } ! 518: ! 519: int ! 520: strcmp(s1, s2) ! 521: register const char *s1, *s2; ! 522: { ! 523: while (*s1 == *s2++) ! 524: if (*s1++ == 0) ! 525: return (0); ! 526: return (*(unsigned char *)s1 - *(unsigned char *)--s2); ! 527: } ! 528: ! 529: ! 530: ! 531:
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