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1.1 root 1: /*
2: * Mach Operating System
3: * Copyright (c) 1991 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 "AS IS"
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 Mellon
24: * the rights to redistribute these changes.
25: */
26: /*
27: * Author: David B. Golub, Carnegie Mellon University
28: * Date: 7/90
29: */
30:
31: #include "mach_kdb.h"
32: #if MACH_KDB
33:
34: /*
35: * Command dispatcher.
36: */
37: #include <cpus.h>
38: #include <norma_ipc.h>
39: #include <norma_vm.h>
40:
41: #include <mach/boolean.h>
42: #include <kern/strings.h>
43: #include <machine/db_machdep.h>
44:
45: #include <ddb/db_lex.h>
46: #include <ddb/db_output.h>
47: #include <ddb/db_command.h>
48: #include <ddb/db_task_thread.h>
49:
50: #include <machine/setjmp.h>
51: #include <kern/thread.h>
52: #include <ipc/ipc_pset.h> /* 4proto */
53: #include <ipc/ipc_port.h> /* 4proto */
54:
55:
56:
57: /*
58: * Exported global variables
59: */
60: boolean_t db_cmd_loop_done;
61: jmp_buf_t *db_recover = 0;
62: db_addr_t db_dot;
63: db_addr_t db_last_addr;
64: db_addr_t db_prev;
65: db_addr_t db_next;
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: boolean_t db_ed_style = TRUE;
73:
74: /*
75: * Results of command search.
76: */
77: #define CMD_UNIQUE 0
78: #define CMD_FOUND 1
79: #define CMD_NONE 2
80: #define CMD_AMBIGUOUS 3
81: #define CMD_HELP 4
82:
83: /*
84: * Search for command prefix.
85: */
86: int
87: db_cmd_search(name, table, cmdp)
88: char * name;
89: struct db_command *table;
90: struct db_command **cmdp; /* out */
91: {
92: struct db_command *cmd;
93: int result = CMD_NONE;
94:
95: for (cmd = table; cmd->name != 0; cmd++) {
96: register char *lp;
97: register char *rp;
98: register int c;
99:
100: lp = name;
101: rp = cmd->name;
102: while ((c = *lp) == *rp) {
103: if (c == 0) {
104: /* complete match */
105: *cmdp = cmd;
106: return (CMD_UNIQUE);
107: }
108: lp++;
109: rp++;
110: }
111: if (c == 0) {
112: /* end of name, not end of command -
113: partial match */
114: if (result == CMD_FOUND) {
115: result = CMD_AMBIGUOUS;
116: /* but keep looking for a full match -
117: this lets us match single letters */
118: }
119: else {
120: *cmdp = cmd;
121: result = CMD_FOUND;
122: }
123: }
124: }
125: if (result == CMD_NONE) {
126: /* check for 'help' */
127: if (!strncmp(name, "help", strlen(name)))
128: result = CMD_HELP;
129: }
130: return (result);
131: }
132:
133: void
134: db_cmd_list(table)
135: struct db_command *table;
136: {
137: register struct db_command *cmd;
138:
139: for (cmd = table; cmd->name != 0; cmd++) {
140: db_printf("%-12s", cmd->name);
141: db_end_line();
142: }
143: }
144:
145: void
146: db_command(last_cmdp, cmd_table)
147: struct db_command **last_cmdp; /* IN_OUT */
148: struct db_command *cmd_table;
149: {
150: struct db_command *cmd;
151: int t;
152: char modif[TOK_STRING_SIZE];
153: db_expr_t addr, count;
154: boolean_t have_addr = FALSE;
155: int result;
156:
157: t = db_read_token();
158: if (t == tEOL || t == tSEMI_COLON) {
159: /* empty line repeats last command, at 'next' */
160: cmd = *last_cmdp;
161: addr = (db_expr_t)db_next;
162: have_addr = FALSE;
163: count = 1;
164: modif[0] = '\0';
165: if (t == tSEMI_COLON)
166: db_unread_token(t);
167: }
168: else if (t == tEXCL) {
169: void db_fncall();
170: db_fncall();
171: return;
172: }
173: else if (t != tIDENT) {
174: db_printf("?\n");
175: db_flush_lex();
176: return;
177: }
178: else {
179: /*
180: * Search for command
181: */
182: while (cmd_table) {
183: result = db_cmd_search(db_tok_string,
184: cmd_table,
185: &cmd);
186: switch (result) {
187: case CMD_NONE:
188: if (db_exec_macro(db_tok_string) == 0)
189: return;
190: db_printf("No such command \"%s\"\n", db_tok_string);
191: db_flush_lex();
192: return;
193: case CMD_AMBIGUOUS:
194: db_printf("Ambiguous\n");
195: db_flush_lex();
196: return;
197: case CMD_HELP:
198: db_cmd_list(cmd_table);
199: db_flush_lex();
200: return;
201: default:
202: break;
203: }
204: if ((cmd_table = cmd->more) != 0) {
205: t = db_read_token();
206: if (t != tIDENT) {
207: db_cmd_list(cmd_table);
208: db_flush_lex();
209: return;
210: }
211: }
212: }
213:
214: if ((cmd->flag & CS_OWN) == 0) {
215: /*
216: * Standard syntax:
217: * command [/modifier] [addr] [,count]
218: */
219: t = db_read_token();
220: if (t == tSLASH) {
221: t = db_read_token();
222: if (t != tIDENT) {
223: db_printf("Bad modifier \"/%s\"\n", db_tok_string);
224: db_flush_lex();
225: return;
226: }
227: db_strcpy(modif, db_tok_string);
228: }
229: else {
230: db_unread_token(t);
231: modif[0] = '\0';
232: }
233:
234: if (db_expression(&addr)) {
235: db_dot = (db_addr_t) addr;
236: db_last_addr = db_dot;
237: have_addr = TRUE;
238: }
239: else {
240: addr = (db_expr_t) db_dot;
241: have_addr = FALSE;
242: }
243: t = db_read_token();
244: if (t == tCOMMA) {
245: if (!db_expression(&count)) {
246: db_printf("Count missing after ','\n");
247: db_flush_lex();
248: return;
249: }
250: }
251: else {
252: db_unread_token(t);
253: count = -1;
254: }
255: }
256: }
257: *last_cmdp = cmd;
258: if (cmd != 0) {
259: /*
260: * Execute the command.
261: */
262: (*cmd->fcn)(addr, have_addr, count, modif);
263:
264: if (cmd->flag & CS_SET_DOT) {
265: /*
266: * If command changes dot, set dot to
267: * previous address displayed (if 'ed' style).
268: */
269: if (db_ed_style) {
270: db_dot = db_prev;
271: }
272: else {
273: db_dot = db_next;
274: }
275: }
276: else {
277: /*
278: * If command does not change dot,
279: * set 'next' location to be the same.
280: */
281: db_next = db_dot;
282: }
283: }
284: }
285:
286: void
287: db_command_list(last_cmdp, cmd_table)
288: struct db_command **last_cmdp; /* IN_OUT */
289: struct db_command *cmd_table;
290: {
291: void db_skip_to_eol();
292:
293: do {
294: db_command(last_cmdp, cmd_table);
295: db_skip_to_eol();
296: } while (db_read_token() == tSEMI_COLON && db_cmd_loop_done == 0);
297: }
298:
299: /*
300: * 'show' commands
301: */
302: extern void db_listbreak_cmd();
303: extern void db_listwatch_cmd();
304: extern void db_show_regs(), db_show_one_thread(), db_show_one_task();
305: extern void db_show_all_threads();
306: extern void db_show_macro();
307: extern void vm_map_print(), vm_object_print(), vm_page_print();
308: extern void vm_map_copy_print();
309: extern void ipc_port_print(), ipc_pset_print(), db_show_all_slocks();
310: extern void ipc_kmsg_print(), ipc_msg_print();
311: extern void db_show_port_id();
312: void db_show_help();
313: #if NORMA_IPC
314: extern void netipc_packet_print(), netipc_pcs_print(), db_show_all_uids();
315: extern void db_show_all_proxies(), db_show_all_principals();
316: extern void db_show_all_uids_verbose();
317: #endif NORMA_IPC
318: #if NORMA_VM
319: extern void xmm_obj_print(), xmm_reply_print();
320: #endif NORMA_VM
321:
322: struct db_command db_show_all_cmds[] = {
323: { "threads", db_show_all_threads, 0, 0 },
324: { "slocks", db_show_all_slocks, 0, 0 },
325: #if NORMA_IPC
326: { "uids", db_show_all_uids, 0, 0 },
327: { "proxies", db_show_all_proxies, 0, 0 },
328: { "principals", db_show_all_principals, 0, 0 },
329: { "vuids", db_show_all_uids_verbose, 0, 0 },
330: #endif NORMA_IPC
331: { (char *)0 }
332: };
333:
334: struct db_command db_show_cmds[] = {
335: { "all", 0, 0, db_show_all_cmds },
336: { "registers", db_show_regs, 0, 0 },
337: { "breaks", db_listbreak_cmd, 0, 0 },
338: { "watches", db_listwatch_cmd, 0, 0 },
339: { "thread", db_show_one_thread, 0, 0 },
340: { "task", db_show_one_task, 0, 0 },
341: { "macro", db_show_macro, CS_OWN, 0 },
342: { "map", vm_map_print, 0, 0 },
343: { "object", vm_object_print, 0, 0 },
344: { "page", vm_page_print, 0, 0 },
345: { "copy", vm_map_copy_print, 0, 0 },
346: { "port", ipc_port_print, 0, 0 },
347: { "pset", ipc_pset_print, 0, 0 },
348: { "kmsg", ipc_kmsg_print, 0, 0 },
349: { "msg", ipc_msg_print, 0, 0 },
350: { "ipc_port", db_show_port_id, 0, 0 },
351: #if NORMA_IPC
352: { "packet", netipc_packet_print, 0, 0 },
353: { "pcs", netipc_pcs_print, 0, 0 },
354: #endif NORMA_IPC
355: #if NORMA_VM
356: { "xmm_obj", xmm_obj_print, 0, 0 },
357: { "xmm_reply", xmm_reply_print, 0, 0 },
358: #endif NORMA_VM
359: { (char *)0, }
360: };
361:
362: extern void db_print_cmd(), db_examine_cmd(), db_set_cmd();
363: extern void db_examine_forward(), db_examine_backward();
364: extern void db_search_cmd();
365: extern void db_write_cmd();
366: extern void db_delete_cmd(), db_breakpoint_cmd();
367: extern void db_deletewatch_cmd(), db_watchpoint_cmd();
368: extern void db_single_step_cmd(), db_trace_until_call_cmd(),
369: db_trace_until_matching_cmd(), db_continue_cmd();
370: extern void db_stack_trace_cmd(), db_cond_cmd();
371: void db_help_cmd();
372: void db_def_macro_cmd(), db_del_macro_cmd();
373: void db_fncall();
374: extern void db_reset_cpu();
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", 0, 0, 0},
380: #endif
381: { "print", db_print_cmd, CS_OWN, 0 },
382: { "examine", db_examine_cmd, CS_MORE|CS_SET_DOT, 0 },
383: { "x", db_examine_cmd, CS_MORE|CS_SET_DOT, 0 },
384: { "xf", db_examine_forward, CS_SET_DOT, 0 },
385: { "xb", db_examine_backward, CS_SET_DOT, 0 },
386: { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
387: { "set", db_set_cmd, CS_OWN, 0 },
388: { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
389: { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
390: { "delete", db_delete_cmd, CS_OWN, 0 },
391: { "d", db_delete_cmd, CS_OWN, 0 },
392: { "break", db_breakpoint_cmd, CS_MORE, 0 },
393: { "dwatch", db_deletewatch_cmd, CS_MORE, 0 },
394: { "watch", db_watchpoint_cmd, CS_MORE, 0 },
395: { "step", db_single_step_cmd, 0, 0 },
396: { "s", db_single_step_cmd, 0, 0 },
397: { "continue", db_continue_cmd, 0, 0 },
398: { "c", db_continue_cmd, 0, 0 },
399: { "until", db_trace_until_call_cmd,0, 0 },
400: { "next", db_trace_until_matching_cmd,0, 0 },
401: { "match", db_trace_until_matching_cmd,0, 0 },
402: { "trace", db_stack_trace_cmd, 0, 0 },
403: { "cond", db_cond_cmd, CS_OWN, 0 },
404: { "call", db_fncall, CS_OWN, 0 },
405: { "macro", db_def_macro_cmd, CS_OWN, 0 },
406: { "dmacro", db_del_macro_cmd, CS_OWN, 0 },
407: { "show", 0, 0, db_show_cmds },
408: { "reset", db_reset_cpu, 0, 0 },
409: { "reboot", db_reset_cpu, 0, 0 },
410: { (char *)0, }
411: };
412:
413: #ifdef DB_MACHINE_COMMANDS
414:
415: /* this function should be called to install the machine dependent
416: commands. It should be called before the debugger is enabled */
417: void db_machine_commands_install(ptr)
418: struct db_command *ptr;
419: {
420: db_command_table[0].more = ptr;
421: return;
422: }
423:
424: #endif
425:
426:
427: struct db_command *db_last_command = 0;
428:
429: void
430: db_help_cmd()
431: {
432: struct db_command *cmd = db_command_table;
433:
434: while (cmd->name != 0) {
435: db_printf("%-12s", cmd->name);
436: db_end_line();
437: cmd++;
438: }
439: }
440:
441: int (*ddb_display)();
442:
443: void
444: db_command_loop()
445: {
446: jmp_buf_t db_jmpbuf;
447: jmp_buf_t *prev = db_recover;
448: extern int db_output_line;
449: extern int db_macro_level;
450: #if NORMA_IPC
451: extern int _node_self; /* node_self() may not be callable yet */
452: #endif NORMA_IPC
453:
454: /*
455: * Initialize 'prev' and 'next' to dot.
456: */
457: db_prev = db_dot;
458: db_next = db_dot;
459:
460: if (ddb_display)
461: (*ddb_display)();
462:
463: db_cmd_loop_done = 0;
464: while (!db_cmd_loop_done) {
465: (void) _setjmp(db_recover = &db_jmpbuf);
466: db_macro_level = 0;
467: if (db_print_position() != 0)
468: db_printf("\n");
469: db_output_line = 0;
470: db_printf("db%s", (db_default_thread)? "t": "");
471: #if NORMA_IPC
472: db_printf("%d", _node_self);
473: #endif
474: #if NCPUS > 1
475: db_printf("{%d}", cpu_number());
476: #endif
477: db_printf("> ");
478:
479: (void) db_read_line("!!");
480: db_command_list(&db_last_command, db_command_table);
481: }
482:
483: db_recover = prev;
484: }
485:
486: boolean_t
487: db_exec_cmd_nest(cmd, size)
488: char *cmd;
489: int size;
490: {
491: struct db_lex_context lex_context;
492:
493: db_cmd_loop_done = 0;
494: if (cmd) {
495: db_save_lex_context(&lex_context);
496: db_switch_input(cmd, size /**OLD, &lex_context OLD**/);
497: }
498: db_command_list(&db_last_command, db_command_table);
499: if (cmd)
500: db_restore_lex_context(&lex_context);
501: return(db_cmd_loop_done == 0);
502: }
503:
504: #ifdef __GNUC__
505: extern __volatile__ void _longjmp();
506: #endif
507:
508: void db_error(s)
509: char *s;
510: {
511: extern int db_macro_level;
512:
513: db_macro_level = 0;
514: if (db_recover) {
515: if (s)
516: db_printf(s);
517: db_flush_lex();
518: _longjmp(db_recover, 1);
519: }
520: else
521: {
522: if (s)
523: db_printf(s);
524: panic("db_error");
525: }
526: }
527:
528: /*
529: * Call random function:
530: * !expr(arg,arg,arg)
531: */
532: void
533: db_fncall()
534: {
535: db_expr_t fn_addr;
536: #define MAXARGS 11
537: db_expr_t args[MAXARGS];
538: int nargs = 0;
539: db_expr_t retval;
540: db_expr_t (*func)();
541: int t;
542:
543: if (!db_expression(&fn_addr)) {
544: db_printf("Bad function \"%s\"\n", db_tok_string);
545: db_flush_lex();
546: return;
547: }
548: func = (db_expr_t (*) ()) fn_addr;
549:
550: t = db_read_token();
551: if (t == tLPAREN) {
552: if (db_expression(&args[0])) {
553: nargs++;
554: while ((t = db_read_token()) == tCOMMA) {
555: if (nargs == MAXARGS) {
556: db_printf("Too many arguments\n");
557: db_flush_lex();
558: return;
559: }
560: if (!db_expression(&args[nargs])) {
561: db_printf("Argument missing\n");
562: db_flush_lex();
563: return;
564: }
565: nargs++;
566: }
567: db_unread_token(t);
568: }
569: if (db_read_token() != tRPAREN) {
570: db_printf("?\n");
571: db_flush_lex();
572: return;
573: }
574: }
575: while (nargs < MAXARGS) {
576: args[nargs++] = 0;
577: }
578:
579: retval = (*func)(args[0], args[1], args[2], args[3], args[4],
580: args[5], args[6], args[7], args[8], args[9] );
581: db_printf(" %#N\n", retval);
582: }
583:
584: boolean_t
585: db_option(modif, option)
586: char *modif;
587: int option;
588: {
589: register char *p;
590:
591: for (p = modif; *p; p++)
592: if (*p == option)
593: return(TRUE);
594: return(FALSE);
595: }
596:
597: #endif MACH_KDB
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