Commit | Line | Data |
---|---|---|
15637ed4 RG |
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 Software.Distribution@CS.CMU.EDU | |
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. | |
15637ed4 | 25 | * |
eb693d65 | 26 | * $Id: db_command.c,v 1.3 1993/11/25 01:30:04 wollman Exp $ |
15637ed4 | 27 | */ |
cbeffc91 | 28 | |
15637ed4 RG |
29 | /* |
30 | * Author: David B. Golub, Carnegie Mellon University | |
31 | * Date: 7/90 | |
32 | */ | |
cbeffc91 | 33 | |
15637ed4 RG |
34 | /* |
35 | * Command dispatcher. | |
36 | */ | |
37 | #include "param.h" | |
4c45483e | 38 | #include "systm.h" |
15637ed4 | 39 | #include "proc.h" |
4c45483e | 40 | #include "ddb/ddb.h" |
15637ed4 RG |
41 | |
42 | #include <ddb/db_lex.h> | |
43 | #include <ddb/db_output.h> | |
44 | ||
45 | #include <setjmp.h> | |
46 | ||
47 | /* | |
48 | * Exported global variables | |
49 | */ | |
50 | boolean_t db_cmd_loop_done; | |
51 | jmp_buf db_jmpbuf; | |
52 | db_addr_t db_dot; | |
53 | db_addr_t db_last_addr; | |
54 | db_addr_t db_prev; | |
55 | db_addr_t db_next; | |
56 | ||
57 | /* | |
58 | * if 'ed' style: 'dot' is set at start of last item printed, | |
59 | * and '+' points to next line. | |
60 | * Otherwise: 'dot' points to next item, '..' points to last. | |
61 | */ | |
62 | boolean_t db_ed_style = TRUE; | |
63 | ||
64 | ||
65 | /* | |
66 | * Utility routine - discard tokens through end-of-line. | |
67 | */ | |
68 | void | |
69 | db_skip_to_eol() | |
70 | { | |
71 | int t; | |
72 | do { | |
73 | t = db_read_token(); | |
74 | } while (t != tEOL); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Command table | |
79 | */ | |
80 | struct command { | |
81 | char * name; /* command name */ | |
82 | void (*fcn)(); /* function to call */ | |
83 | int flag; /* extra info: */ | |
84 | #define CS_OWN 0x1 /* non-standard syntax */ | |
85 | #define CS_MORE 0x2 /* standard syntax, but may have other | |
86 | words at end */ | |
87 | #define CS_SET_DOT 0x100 /* set dot after command */ | |
88 | struct command *more; /* another level of command */ | |
89 | }; | |
90 | ||
91 | /* | |
92 | * Results of command search. | |
93 | */ | |
94 | #define CMD_UNIQUE 0 | |
95 | #define CMD_FOUND 1 | |
96 | #define CMD_NONE 2 | |
97 | #define CMD_AMBIGUOUS 3 | |
98 | #define CMD_HELP 4 | |
99 | ||
100 | /* | |
101 | * Search for command prefix. | |
102 | */ | |
103 | int | |
104 | db_cmd_search(name, table, cmdp) | |
105 | char * name; | |
106 | struct command *table; | |
107 | struct command **cmdp; /* out */ | |
108 | { | |
109 | struct command *cmd; | |
110 | int result = CMD_NONE; | |
111 | ||
112 | for (cmd = table; cmd->name != 0; cmd++) { | |
113 | register char *lp; | |
114 | register char *rp; | |
115 | register int c; | |
116 | ||
117 | lp = name; | |
118 | rp = cmd->name; | |
119 | while ((c = *lp) == *rp) { | |
120 | if (c == 0) { | |
121 | /* complete match */ | |
122 | *cmdp = cmd; | |
123 | return (CMD_UNIQUE); | |
124 | } | |
125 | lp++; | |
126 | rp++; | |
127 | } | |
128 | if (c == 0) { | |
129 | /* end of name, not end of command - | |
130 | partial match */ | |
131 | if (result == CMD_FOUND) { | |
132 | result = CMD_AMBIGUOUS; | |
133 | /* but keep looking for a full match - | |
134 | this lets us match single letters */ | |
135 | } | |
136 | else { | |
137 | *cmdp = cmd; | |
138 | result = CMD_FOUND; | |
139 | } | |
140 | } | |
141 | } | |
142 | if (result == CMD_NONE) { | |
143 | /* check for 'help' */ | |
144 | if (name[0] == 'h' && name[1] == 'e' | |
145 | && name[2] == 'l' && name[3] == 'p') | |
146 | result = CMD_HELP; | |
147 | } | |
148 | return (result); | |
149 | } | |
150 | ||
151 | void | |
152 | db_cmd_list(table) | |
153 | struct command *table; | |
154 | { | |
155 | register struct command *cmd; | |
156 | ||
157 | for (cmd = table; cmd->name != 0; cmd++) { | |
158 | db_printf("%-12s", cmd->name); | |
159 | db_end_line(); | |
160 | } | |
161 | } | |
162 | ||
163 | void | |
164 | db_command(last_cmdp, cmd_table) | |
165 | struct command **last_cmdp; /* IN_OUT */ | |
166 | struct command *cmd_table; | |
167 | { | |
168 | struct command *cmd; | |
169 | int t; | |
170 | char modif[TOK_STRING_SIZE]; | |
171 | db_expr_t addr, count; | |
4c45483e | 172 | boolean_t have_addr = FALSE; |
15637ed4 RG |
173 | int result; |
174 | ||
175 | t = db_read_token(); | |
176 | if (t == tEOL) { | |
177 | /* empty line repeats last command, at 'next' */ | |
178 | cmd = *last_cmdp; | |
179 | addr = (db_expr_t)db_next; | |
180 | have_addr = FALSE; | |
181 | count = 1; | |
182 | modif[0] = '\0'; | |
183 | } | |
184 | else if (t == tEXCL) { | |
185 | void db_fncall(); | |
186 | db_fncall(); | |
187 | return; | |
188 | } | |
189 | else if (t != tIDENT) { | |
190 | db_printf("?\n"); | |
191 | db_flush_lex(); | |
192 | return; | |
193 | } | |
194 | else { | |
195 | /* | |
196 | * Search for command | |
197 | */ | |
198 | while (cmd_table) { | |
199 | result = db_cmd_search(db_tok_string, | |
200 | cmd_table, | |
201 | &cmd); | |
202 | switch (result) { | |
203 | case CMD_NONE: | |
204 | db_printf("No such command\n"); | |
205 | db_flush_lex(); | |
206 | return; | |
207 | case CMD_AMBIGUOUS: | |
208 | db_printf("Ambiguous\n"); | |
209 | db_flush_lex(); | |
210 | return; | |
211 | case CMD_HELP: | |
212 | db_cmd_list(cmd_table); | |
213 | db_flush_lex(); | |
214 | return; | |
215 | default: | |
216 | break; | |
217 | } | |
218 | if ((cmd_table = cmd->more) != 0) { | |
219 | t = db_read_token(); | |
220 | if (t != tIDENT) { | |
221 | db_cmd_list(cmd_table); | |
222 | db_flush_lex(); | |
223 | return; | |
224 | } | |
225 | } | |
226 | } | |
227 | ||
228 | if ((cmd->flag & CS_OWN) == 0) { | |
229 | /* | |
230 | * Standard syntax: | |
231 | * command [/modifier] [addr] [,count] | |
232 | */ | |
233 | t = db_read_token(); | |
234 | if (t == tSLASH) { | |
235 | t = db_read_token(); | |
236 | if (t != tIDENT) { | |
237 | db_printf("Bad modifier\n"); | |
238 | db_flush_lex(); | |
239 | return; | |
240 | } | |
241 | db_strcpy(modif, db_tok_string); | |
242 | } | |
243 | else { | |
244 | db_unread_token(t); | |
245 | modif[0] = '\0'; | |
246 | } | |
247 | ||
248 | if (db_expression(&addr)) { | |
249 | db_dot = (db_addr_t) addr; | |
250 | db_last_addr = db_dot; | |
251 | have_addr = TRUE; | |
252 | } | |
253 | else { | |
254 | addr = (db_expr_t) db_dot; | |
255 | have_addr = FALSE; | |
256 | } | |
257 | t = db_read_token(); | |
258 | if (t == tCOMMA) { | |
259 | if (!db_expression(&count)) { | |
260 | db_printf("Count missing\n"); | |
261 | db_flush_lex(); | |
262 | return; | |
263 | } | |
264 | } | |
265 | else { | |
266 | db_unread_token(t); | |
267 | count = -1; | |
268 | } | |
269 | if ((cmd->flag & CS_MORE) == 0) { | |
270 | db_skip_to_eol(); | |
271 | } | |
272 | } | |
273 | } | |
274 | *last_cmdp = cmd; | |
275 | if (cmd != 0) { | |
276 | /* | |
277 | * Execute the command. | |
278 | */ | |
279 | (*cmd->fcn)(addr, have_addr, count, modif); | |
280 | ||
281 | if (cmd->flag & CS_SET_DOT) { | |
282 | /* | |
283 | * If command changes dot, set dot to | |
284 | * previous address displayed (if 'ed' style). | |
285 | */ | |
286 | if (db_ed_style) { | |
287 | db_dot = db_prev; | |
288 | } | |
289 | else { | |
290 | db_dot = db_next; | |
291 | } | |
292 | } | |
293 | else { | |
294 | /* | |
295 | * If command does not change dot, | |
296 | * set 'next' location to be the same. | |
297 | */ | |
298 | db_next = db_dot; | |
299 | } | |
300 | } | |
301 | } | |
302 | ||
303 | /* | |
304 | * 'show' commands | |
305 | */ | |
306 | extern void db_listbreak_cmd(); | |
307 | extern void db_listwatch_cmd(); | |
308 | extern void db_show_regs(), db_show_one_thread(), db_show_all_threads(); | |
309 | extern void vm_map_print(), vm_object_print(), vm_page_print(); | |
eb693d65 | 310 | extern void db_ps(); |
15637ed4 RG |
311 | extern void ipc_port_print(); |
312 | void db_show_help(); | |
313 | ||
314 | struct command db_show_all_cmds[] = { | |
315 | #if 0 | |
eb693d65 | 316 | { "threads", db_show_all_threads, 0, 0 }, |
15637ed4 | 317 | #endif |
eb693d65 | 318 | { "procs", db_ps, 0, 0 }, |
15637ed4 RG |
319 | { (char *)0 } |
320 | }; | |
321 | ||
322 | struct command db_show_cmds[] = { | |
323 | { "all", 0, 0, db_show_all_cmds }, | |
324 | { "registers", db_show_regs, 0, 0 }, | |
325 | { "breaks", db_listbreak_cmd, 0, 0 }, | |
326 | { "watches", db_listwatch_cmd, 0, 0 }, | |
327 | #if 0 | |
328 | { "thread", db_show_one_thread, 0, 0 }, | |
329 | #endif | |
330 | { "map", vm_map_print, 0, 0 }, | |
331 | { "object", vm_object_print, 0, 0 }, | |
332 | #if 0 | |
333 | { "page", vm_page_print, 0, 0 }, | |
334 | #endif | |
335 | #if 0 | |
336 | { "port", ipc_port_print, 0, 0 }, | |
337 | #endif | |
338 | { (char *)0, } | |
339 | }; | |
340 | ||
341 | extern void db_print_cmd(), db_examine_cmd(), db_set_cmd(); | |
342 | extern void db_search_cmd(); | |
343 | extern void db_write_cmd(); | |
344 | extern void db_delete_cmd(), db_breakpoint_cmd(); | |
345 | extern void db_deletewatch_cmd(), db_watchpoint_cmd(); | |
346 | extern void db_single_step_cmd(), db_trace_until_call_cmd(), | |
347 | db_trace_until_matching_cmd(), db_continue_cmd(); | |
348 | extern void db_stack_trace_cmd(); | |
349 | void db_help_cmd(); | |
350 | void db_fncall(); | |
351 | ||
352 | struct command db_command_table[] = { | |
353 | { "print", db_print_cmd, 0, 0 }, | |
354 | { "examine", db_examine_cmd, CS_SET_DOT, 0 }, | |
355 | { "x", db_examine_cmd, CS_SET_DOT, 0 }, | |
356 | { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, | |
357 | { "set", db_set_cmd, CS_OWN, 0 }, | |
358 | { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, | |
359 | { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, | |
360 | { "delete", db_delete_cmd, 0, 0 }, | |
361 | { "d", db_delete_cmd, 0, 0 }, | |
362 | { "break", db_breakpoint_cmd, 0, 0 }, | |
363 | { "dwatch", db_deletewatch_cmd, 0, 0 }, | |
364 | { "watch", db_watchpoint_cmd, CS_MORE,0 }, | |
365 | { "step", db_single_step_cmd, 0, 0 }, | |
366 | { "s", db_single_step_cmd, 0, 0 }, | |
367 | { "continue", db_continue_cmd, 0, 0 }, | |
368 | { "c", db_continue_cmd, 0, 0 }, | |
369 | { "until", db_trace_until_call_cmd,0, 0 }, | |
370 | { "next", db_trace_until_matching_cmd,0, 0 }, | |
371 | { "match", db_trace_until_matching_cmd,0, 0 }, | |
372 | { "trace", db_stack_trace_cmd, 0, 0 }, | |
373 | { "call", db_fncall, CS_OWN, 0 }, | |
374 | { "show", 0, 0, db_show_cmds }, | |
eb693d65 | 375 | { "ps", db_ps, 0, 0 }, |
15637ed4 RG |
376 | { (char *)0, } |
377 | }; | |
378 | ||
379 | struct command *db_last_command = 0; | |
380 | ||
381 | void | |
382 | db_help_cmd() | |
383 | { | |
384 | struct command *cmd = db_command_table; | |
385 | ||
386 | while (cmd->name != 0) { | |
387 | db_printf("%-12s", cmd->name); | |
388 | db_end_line(); | |
389 | cmd++; | |
390 | } | |
391 | } | |
392 | ||
393 | void | |
394 | db_command_loop() | |
395 | { | |
396 | /* | |
397 | * Initialize 'prev' and 'next' to dot. | |
398 | */ | |
399 | db_prev = db_dot; | |
400 | db_next = db_dot; | |
401 | ||
402 | db_cmd_loop_done = 0; | |
403 | while (!db_cmd_loop_done) { | |
404 | ||
405 | (void) setjmp(db_jmpbuf); | |
406 | if (db_print_position() != 0) | |
407 | db_printf("\n"); | |
408 | ||
409 | db_printf("db> "); | |
410 | (void) db_read_line(); | |
411 | ||
412 | db_command(&db_last_command, db_command_table); | |
413 | } | |
414 | } | |
415 | ||
416 | void | |
417 | db_error(s) | |
418 | char *s; | |
419 | { | |
420 | if (s) | |
421 | db_printf(s); | |
422 | db_flush_lex(); | |
423 | longjmp(db_jmpbuf, 1); | |
424 | } | |
425 | ||
426 | ||
427 | /* | |
428 | * Call random function: | |
429 | * !expr(arg,arg,arg) | |
430 | */ | |
431 | void | |
432 | db_fncall() | |
433 | { | |
434 | db_expr_t fn_addr; | |
435 | #define MAXARGS 11 | |
436 | db_expr_t args[MAXARGS]; | |
437 | int nargs = 0; | |
438 | db_expr_t retval; | |
439 | db_expr_t (*func)(); | |
440 | int t; | |
441 | ||
442 | if (!db_expression(&fn_addr)) { | |
443 | db_printf("Bad function\n"); | |
444 | db_flush_lex(); | |
445 | return; | |
446 | } | |
447 | func = (db_expr_t (*) ()) fn_addr; | |
448 | ||
449 | t = db_read_token(); | |
450 | if (t == tLPAREN) { | |
451 | if (db_expression(&args[0])) { | |
452 | nargs++; | |
453 | while ((t = db_read_token()) == tCOMMA) { | |
454 | if (nargs == MAXARGS) { | |
455 | db_printf("Too many arguments\n"); | |
456 | db_flush_lex(); | |
457 | return; | |
458 | } | |
459 | if (!db_expression(&args[nargs])) { | |
460 | db_printf("Argument missing\n"); | |
461 | db_flush_lex(); | |
462 | return; | |
463 | } | |
464 | nargs++; | |
465 | } | |
466 | db_unread_token(t); | |
467 | } | |
468 | if (db_read_token() != tRPAREN) { | |
469 | db_printf("?\n"); | |
470 | db_flush_lex(); | |
471 | return; | |
472 | } | |
473 | } | |
474 | db_skip_to_eol(); | |
475 | ||
476 | while (nargs < MAXARGS) { | |
477 | args[nargs++] = 0; | |
478 | } | |
479 | ||
480 | retval = (*func)(args[0], args[1], args[2], args[3], args[4], | |
481 | args[5], args[6], args[7], args[8], args[9] ); | |
482 | db_printf("%#n\n", retval); | |
483 | } |