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04497f0b NW |
1 | /*- |
2 | * This code is derived from software copyrighted by the Free Software | |
3 | * Foundation. | |
4 | * | |
5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. | |
6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. | |
7 | */ | |
8 | ||
9 | #ifndef lint | |
10 | static char sccsid[] = "@(#)printcmd.c 6.5 (Berkeley) 5/8/91"; | |
11 | #endif /* not lint */ | |
12 | ||
13 | /* Print values for GNU debugger GDB. | |
14 | Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. | |
15 | ||
16 | This file is part of GDB. | |
17 | ||
18 | GDB is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 1, or (at your option) | |
21 | any later version. | |
22 | ||
23 | GDB is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with GDB; see the file COPYING. If not, write to | |
30 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
32 | #include <stdio.h> | |
33 | #include "defs.h" | |
34 | #include "param.h" | |
35 | #include "frame.h" | |
36 | #include "symtab.h" | |
37 | #include "value.h" | |
38 | #include "expression.h" | |
39 | ||
40 | struct format_data | |
41 | { | |
42 | int count; | |
43 | char format; | |
44 | char size; | |
45 | }; | |
46 | ||
47 | /* Last specified output format. */ | |
48 | ||
49 | static char last_format = 'x'; | |
50 | ||
51 | /* Last specified examination size. 'b', 'h', 'w' or `q'. */ | |
52 | ||
53 | static char last_size = 'w'; | |
54 | ||
55 | /* Default address to examine next. */ | |
56 | ||
57 | static CORE_ADDR next_address; | |
58 | ||
59 | /* Last address examined. */ | |
60 | ||
61 | static CORE_ADDR last_examine_address; | |
62 | ||
63 | /* Contents of last address examined. | |
64 | This is not valid past the end of the `x' command! */ | |
65 | ||
66 | static value last_examine_value; | |
67 | ||
68 | /* Number of auto-display expression currently being displayed. | |
69 | So that we can deleted it if we get an error or a signal within it. | |
70 | -1 when not doing one. */ | |
71 | ||
72 | int current_display_number; | |
73 | ||
74 | static void do_one_display (); | |
75 | ||
76 | void do_displays (); | |
77 | void print_address (); | |
78 | void print_floating (); | |
79 | void print_scalar_formatted (); | |
80 | void print_formatted_address (); | |
81 | ||
82 | \f | |
83 | /* Decode a format specification. *STRING_PTR should point to it. | |
84 | OFORMAT and OSIZE are used as defaults for the format and size | |
85 | if none are given in the format specification. | |
86 | If OSIZE is zero, then the size field of the returned value | |
87 | should be set only if a size is explicitly specified by the | |
88 | user. | |
89 | The structure returned describes all the data | |
90 | found in the specification. In addition, *STRING_PTR is advanced | |
91 | past the specification and past all whitespace following it. */ | |
92 | ||
93 | struct format_data | |
94 | decode_format (string_ptr, oformat, osize) | |
95 | char **string_ptr; | |
96 | char oformat; | |
97 | char osize; | |
98 | { | |
99 | struct format_data val; | |
100 | register char *p = *string_ptr; | |
101 | ||
102 | val.format = '?'; | |
103 | val.size = '?'; | |
104 | val.count = 1; | |
105 | ||
106 | if (*p >= '0' && *p <= '9') | |
107 | val.count = atoi (p); | |
108 | while (*p >= '0' && *p <= '9') p++; | |
109 | ||
110 | /* Now process size or format letters that follow. */ | |
111 | ||
112 | while (1) | |
113 | { | |
114 | if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') | |
115 | val.size = *p++; | |
116 | #ifdef LONG_LONG | |
117 | else if (*p == 'l') | |
118 | { | |
119 | val.size = 'g'; | |
120 | p++; | |
121 | } | |
122 | #endif | |
123 | else if ((*p >= 'a' && *p <= 'z') || (*p >= 'A' && *p <= 'Z')) | |
124 | val.format = *p++; | |
125 | else | |
126 | break; | |
127 | } | |
128 | ||
129 | #ifndef LONG_LONG | |
130 | /* Make sure 'g' size is not used on integer types. | |
131 | Well, actually, we can handle hex. */ | |
132 | if (val.size == 'g' && val.format != 'f' && val.format != 'x') | |
133 | val.size = 'w'; | |
134 | #endif | |
135 | ||
136 | while (*p == ' ' || *p == '\t') p++; | |
137 | *string_ptr = p; | |
138 | ||
139 | /* Set defaults for format and size if not specified. */ | |
140 | if (val.format == '?') | |
141 | { | |
142 | if (val.size == '?') | |
143 | { | |
144 | /* Neither has been specified. */ | |
145 | val.format = oformat; | |
146 | val.size = osize; | |
147 | } | |
148 | else | |
149 | /* If a size is specified, any format makes a reasonable | |
150 | default except 'i'. */ | |
151 | val.format = oformat == 'i' ? 'x' : oformat; | |
152 | } | |
153 | else if (val.size == '?') | |
154 | switch (val.format) | |
155 | { | |
156 | case 'a': | |
157 | case 's': | |
158 | case 'A': | |
159 | /* Addresses must be words. */ | |
160 | val.size = osize ? 'w' : osize; | |
161 | break; | |
162 | case 'f': | |
163 | /* Floating point has to be word or giantword. */ | |
164 | if (osize == 'w' || osize == 'g') | |
165 | val.size = osize; | |
166 | else | |
167 | /* Default it to giantword if the last used size is not | |
168 | appropriate. */ | |
169 | val.size = osize ? 'g' : osize; | |
170 | break; | |
171 | case 'c': | |
172 | /* Characters default to one byte. */ | |
173 | val.size = osize ? 'b' : osize; | |
174 | break; | |
175 | default: | |
176 | /* The default is the size most recently specified. */ | |
177 | val.size = osize; | |
178 | } | |
179 | ||
180 | return val; | |
181 | } | |
182 | \f | |
183 | /* Print value VAL on stdout according to FORMAT, a letter or 0. | |
184 | Do not end with a newline. | |
185 | 0 means print VAL according to its own type. | |
186 | SIZE is the letter for the size of datum being printed. | |
187 | This is used to pad hex numbers so they line up. */ | |
188 | ||
189 | static void | |
190 | print_formatted (val, format, size) | |
191 | register value val; | |
192 | register char format; | |
193 | char size; | |
194 | { | |
195 | int len = TYPE_LENGTH (VALUE_TYPE (val)); | |
196 | ||
197 | if (VALUE_LVAL (val) == lval_memory) | |
198 | next_address = VALUE_ADDRESS (val) + len; | |
199 | ||
200 | switch (format) | |
201 | { | |
202 | case 's': | |
203 | next_address = VALUE_ADDRESS (val) | |
204 | + value_print (value_addr (val), stdout, 0, Val_pretty_default); | |
205 | break; | |
206 | ||
207 | case 'i': | |
208 | next_address = VALUE_ADDRESS (val) | |
209 | + print_insn (VALUE_ADDRESS (val), stdout); | |
210 | break; | |
211 | ||
212 | default: | |
213 | if (format == 0 | |
214 | || TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_ARRAY | |
215 | || TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_STRUCT | |
216 | || TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_UNION | |
217 | || VALUE_REPEATED (val)) | |
218 | value_print (val, stdout, format, Val_pretty_default); | |
219 | else | |
220 | print_scalar_formatted (VALUE_CONTENTS (val), VALUE_TYPE (val), | |
221 | format, size, stdout); | |
222 | } | |
223 | } | |
224 | ||
225 | /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, | |
226 | according to letters FORMAT and SIZE on STREAM. | |
227 | FORMAT may not be zero. Formats s and i are not supported at this level. | |
228 | ||
229 | This is how the elements of an array or structure are printed | |
230 | with a format. */ | |
231 | ||
232 | void | |
233 | print_scalar_formatted (valaddr, type, format, size, stream) | |
234 | char *valaddr; | |
235 | struct type *type; | |
236 | char format; | |
237 | int size; | |
238 | FILE *stream; | |
239 | { | |
240 | LONGEST val_long; | |
241 | int len = TYPE_LENGTH (type); | |
242 | ||
243 | if (size == 'g' && sizeof (LONGEST) < 8 | |
244 | && format == 'x') | |
245 | { | |
246 | /* ok, we're going to have to get fancy here. Assumption: a | |
247 | long is four bytes. */ | |
248 | unsigned long v1, v2, tmp; | |
249 | ||
250 | v1 = unpack_long (builtin_type_long, valaddr); | |
251 | v2 = unpack_long (builtin_type_long, valaddr + 4); | |
252 | ||
253 | #ifdef BYTES_BIG_ENDIAN | |
254 | #else | |
255 | /* Little endian -- swap the two for printing */ | |
256 | tmp = v1; | |
257 | v1 = v2; | |
258 | v2 = tmp; | |
259 | #endif | |
260 | ||
261 | switch (format) | |
262 | { | |
263 | case 'x': | |
264 | fprintf_filtered (stream, "0x%08x%08x", v1, v2); | |
265 | break; | |
266 | default: | |
267 | error ("Output size \"g\" unimplemented for format \"%c\".", | |
268 | format); | |
269 | } | |
270 | return; | |
271 | } | |
272 | ||
273 | val_long = unpack_long (type, valaddr); | |
274 | ||
275 | /* If value is unsigned, truncate it in case negative. */ | |
276 | if (format != 'd') | |
277 | { | |
278 | if (len == sizeof (char)) | |
279 | val_long &= (1 << 8 * sizeof(char)) - 1; | |
280 | else if (len == sizeof (short)) | |
281 | val_long &= (1 << 8 * sizeof(short)) - 1; | |
282 | else if (len == sizeof (long)) | |
283 | val_long &= (unsigned long) - 1; | |
284 | } | |
285 | ||
286 | switch (format) | |
287 | { | |
288 | case 'x': | |
289 | #ifdef LONG_LONG | |
290 | if (!size) | |
291 | size = (len < sizeof (long long) ? 'w' : 'g'); | |
292 | switch (size) | |
293 | { | |
294 | case 'b': | |
295 | fprintf_filtered (stream, "0x%02llx", val_long); | |
296 | break; | |
297 | case 'h': | |
298 | fprintf_filtered (stream, "0x%04llx", val_long); | |
299 | break; | |
300 | case 0: /* no size specified, like in print */ | |
301 | case 'w': | |
302 | fprintf_filtered (stream, "0x%08llx", val_long); | |
303 | break; | |
304 | case 'g': | |
305 | fprintf_filtered (stream, "0x%016llx", val_long); | |
306 | break; | |
307 | default: | |
308 | error ("Undefined output size \"%c\".", size); | |
309 | } | |
310 | #else | |
311 | switch (size) | |
312 | { | |
313 | case 'b': | |
314 | fprintf_filtered (stream, "0x%02x", val_long); | |
315 | break; | |
316 | case 'h': | |
317 | fprintf_filtered (stream, "0x%04x", val_long); | |
318 | break; | |
319 | case 0: /* no size specified, like in print */ | |
320 | case 'w': | |
321 | fprintf_filtered (stream, "0x%08x", val_long); | |
322 | break; | |
323 | case 'g': | |
324 | fprintf_filtered (stream, "0x%o16x", val_long); | |
325 | break; | |
326 | default: | |
327 | error ("Undefined output size \"%c\".", size); | |
328 | } | |
329 | #endif /* not LONG_LONG */ | |
330 | break; | |
331 | ||
332 | case 'd': | |
333 | #ifdef LONG_LONG | |
334 | fprintf_filtered (stream, "%lld", val_long); | |
335 | #else | |
336 | fprintf_filtered (stream, "%d", val_long); | |
337 | #endif | |
338 | break; | |
339 | ||
340 | case 'u': | |
341 | #ifdef LONG_LONG | |
342 | fprintf_filtered (stream, "%llu", val_long); | |
343 | #else | |
344 | fprintf_filtered (stream, "%u", val_long); | |
345 | #endif | |
346 | break; | |
347 | ||
348 | case 'o': | |
349 | if (val_long) | |
350 | #ifdef LONG_LONG | |
351 | fprintf_filtered (stream, "0%llo", val_long); | |
352 | #else | |
353 | fprintf_filtered (stream, "0%o", val_long); | |
354 | #endif | |
355 | else | |
356 | fprintf_filtered (stream, "0"); | |
357 | break; | |
358 | ||
359 | case 'a': | |
360 | print_address ((CORE_ADDR) val_long, stream); | |
361 | break; | |
362 | ||
363 | case 'A': | |
364 | print_formatted_address ((CORE_ADDR) val_long, stream); | |
365 | break; | |
366 | ||
367 | case 'c': | |
368 | value_print (value_from_long (builtin_type_char, val_long), stream, 0, | |
369 | Val_pretty_default); | |
370 | break; | |
371 | ||
372 | case 'f': | |
373 | if (len == sizeof (float)) | |
374 | type = builtin_type_float; | |
375 | else if (len == sizeof (double)) | |
376 | type = builtin_type_double; | |
377 | print_floating(valaddr, type, stream); | |
378 | break; | |
379 | ||
380 | case 0: | |
381 | abort (); | |
382 | ||
383 | default: | |
384 | error ("Undefined output format \"%c\".", format); | |
385 | } | |
386 | } | |
387 | ||
388 | /* Print a floating point value of type TYPE, pointed to in GDB by VALADDR, | |
389 | on STREAM. */ | |
390 | ||
391 | void | |
392 | print_floating(valaddr, type, stream) | |
393 | char *valaddr; | |
394 | struct type *type; | |
395 | FILE *stream; | |
396 | { | |
397 | double doub; | |
398 | int inv; | |
399 | int len = TYPE_LENGTH (type); | |
400 | ||
401 | doub = unpack_double (type, valaddr, &inv); | |
402 | if (inv) | |
403 | fprintf_filtered (stream, "Invalid float value"); | |
404 | else if (doub != doub) | |
405 | { | |
406 | /* Surely it is an IEEE floating point NaN. */ | |
407 | ||
408 | long low, high, *arg = (long *)valaddr; /* ASSUMED 32 BITS */ | |
409 | int nonneg; | |
410 | ||
411 | if (len <= sizeof(float)) | |
412 | { | |
413 | /* It's single precision. */ | |
414 | low = *arg; | |
415 | nonneg = low >= 0; | |
416 | low &= 0x7fffff; | |
417 | high = 0; | |
418 | } | |
419 | else | |
420 | { | |
421 | /* It's double precision. | |
422 | Get the high and low words of the fraction. | |
423 | Distinguish big and little-endian machines. */ | |
424 | #ifdef WORDS_BIG_ENDIAN | |
425 | low = arg[1], high = arg[0]; | |
426 | #else | |
427 | low = arg[0], high = arg[1]; | |
428 | #endif | |
429 | nonneg = high >= 0; | |
430 | high &= 0xfffff; | |
431 | } | |
432 | if (high) | |
433 | fprintf_filtered (stream, "-NaN(0x%lx%.8lx)" + nonneg, high, low); | |
434 | else | |
435 | fprintf_filtered (stream, "-NaN(0x%lx)" + nonneg, low); | |
436 | } | |
437 | else | |
438 | fprintf_filtered (stream, len <= sizeof(float) ? "%.6g" : "%.17g", doub); | |
439 | } | |
440 | ||
441 | /* Specify default address for `x' command. | |
442 | `info lines' uses this. */ | |
443 | ||
444 | void | |
445 | set_next_address (addr) | |
446 | CORE_ADDR addr; | |
447 | { | |
448 | next_address = addr; | |
449 | ||
450 | /* Make address available to the user as $_. */ | |
451 | set_internalvar (lookup_internalvar ("_"), | |
452 | value_from_long (builtin_type_int, (LONGEST) addr)); | |
453 | } | |
454 | ||
455 | /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM. */ | |
456 | ||
457 | void | |
458 | print_address_symbolic (addr, stream) | |
459 | CORE_ADDR addr; | |
460 | FILE *stream; | |
461 | { | |
462 | register char *format; | |
463 | int name_location; | |
464 | register int i = find_pc_misc_function (addr); | |
465 | ||
466 | /* If nothing comes out, don't print anything symbolic. */ | |
467 | if (i < 0) return; | |
468 | name_location = misc_function_vector[i].address; | |
469 | ||
470 | if (addr - name_location) | |
471 | format = " <%s+%d>"; | |
472 | else | |
473 | format = " <%s>"; | |
474 | ||
475 | fprintf_filtered (stream, format, | |
476 | misc_function_vector[i].name, addr - name_location); | |
477 | } | |
478 | ||
479 | /* Print address ADDR symbolically on STREAM. | |
480 | First print it as a number. Then perhaps print | |
481 | <SYMBOL + OFFSET> after the number. */ | |
482 | ||
483 | void | |
484 | print_address (addr, stream) | |
485 | CORE_ADDR addr; | |
486 | FILE *stream; | |
487 | { | |
488 | fprintf_filtered (stream, "0x%x", addr); | |
489 | print_address_symbolic (addr, stream); | |
490 | } | |
491 | ||
492 | /* Like print_address but opnly prints symbolically. */ | |
493 | ||
494 | void | |
495 | print_formatted_address (addr, stream) | |
496 | CORE_ADDR addr; | |
497 | FILE *stream; | |
498 | { | |
499 | register int i = 0; | |
500 | register char *format; | |
501 | register struct symbol *fs; | |
502 | char *name; | |
503 | int name_location; | |
504 | ||
505 | i = find_pc_partial_function (addr, &name, &name_location); | |
506 | ||
507 | /* If nothing comes out, don't print anything symbolic. */ | |
508 | ||
509 | if (i == 0) | |
510 | fprintf_filtered (stream, "0x%x", addr); | |
511 | else if (addr - name_location) | |
512 | fprintf_filtered (stream, "%s+%d", name, addr - name_location); | |
513 | else | |
514 | fprintf_filtered (stream, "%s", name); | |
515 | } | |
516 | \f | |
517 | /* Examine data at address ADDR in format FMT. | |
518 | Fetch it from memory and print on stdout. */ | |
519 | ||
520 | static void | |
521 | do_examine (fmt, addr) | |
522 | struct format_data fmt; | |
523 | CORE_ADDR addr; | |
524 | { | |
525 | register char format = 0; | |
526 | register char size; | |
527 | register int count = 1; | |
528 | struct type *val_type; | |
529 | register int i; | |
530 | register int maxelts; | |
531 | ||
532 | format = fmt.format; | |
533 | size = fmt.size; | |
534 | count = fmt.count; | |
535 | next_address = addr; | |
536 | ||
537 | /* String or instruction format implies fetch single bytes | |
538 | regardless of the specified size. */ | |
539 | if (format == 's' || format == 'i') | |
540 | size = 'b'; | |
541 | ||
542 | if (size == 'b') | |
543 | val_type = builtin_type_char; | |
544 | else if (size == 'h') | |
545 | val_type = builtin_type_short; | |
546 | else if (size == 'w') | |
547 | val_type = builtin_type_long; | |
548 | else if (size == 'g') | |
549 | #ifndef LONG_LONG | |
550 | val_type = builtin_type_double; | |
551 | #else | |
552 | val_type = builtin_type_long_long; | |
553 | #endif | |
554 | ||
555 | maxelts = 8; | |
556 | if (size == 'w') | |
557 | maxelts = 4; | |
558 | if (size == 'g') | |
559 | maxelts = 2; | |
560 | if (format == 's' || format == 'i') | |
561 | maxelts = 1; | |
562 | ||
563 | /* Print as many objects as specified in COUNT, at most maxelts per line, | |
564 | with the address of the next one at the start of each line. */ | |
565 | ||
566 | while (count > 0) | |
567 | { | |
568 | print_address (next_address, stdout); | |
569 | printf_filtered (":"); | |
570 | for (i = maxelts; | |
571 | i > 0 && count > 0; | |
572 | i--, count--) | |
573 | { | |
574 | printf_filtered ("\t"); | |
575 | /* Note that print_formatted sets next_address for the next | |
576 | object. */ | |
577 | last_examine_address = next_address; | |
578 | last_examine_value = value_at (val_type, next_address); | |
579 | print_formatted (last_examine_value, format, size); | |
580 | } | |
581 | printf_filtered ("\n"); | |
582 | fflush (stdout); | |
583 | } | |
584 | } | |
585 | \f | |
586 | static void | |
587 | validate_format (fmt, cmdname) | |
588 | struct format_data fmt; | |
589 | char *cmdname; | |
590 | { | |
591 | if (fmt.size != 0) | |
592 | error ("Size letters are meaningless in \"%s\" command.", cmdname); | |
593 | if (fmt.count != 1) | |
594 | error ("Item count other than 1 is meaningless in \"%s\" command.", | |
595 | cmdname); | |
596 | if (fmt.format == 'i' || fmt.format == 's') | |
597 | error ("Format letter \"%c\" is meaningless in \"%s\" command.", | |
598 | fmt.format, cmdname); | |
599 | } | |
600 | ||
601 | static void | |
602 | print_command (exp) | |
603 | char *exp; | |
604 | { | |
605 | struct expression *expr; | |
606 | register struct cleanup *old_chain = 0; | |
607 | register char format = 0; | |
608 | register value val; | |
609 | struct format_data fmt; | |
610 | int histindex; | |
611 | int cleanup = 0; | |
612 | ||
613 | if (exp && *exp == '/') | |
614 | { | |
615 | exp++; | |
616 | fmt = decode_format (&exp, last_format, 0); | |
617 | validate_format (fmt, "print"); | |
618 | last_format = format = fmt.format; | |
619 | } | |
620 | ||
621 | if (exp && *exp) | |
622 | { | |
623 | expr = parse_c_expression (exp); | |
624 | old_chain = make_cleanup (free_current_contents, &expr); | |
625 | cleanup = 1; | |
626 | val = evaluate_expression (expr); | |
627 | } | |
628 | else | |
629 | val = access_value_history (0); | |
630 | ||
631 | histindex = record_latest_value (val); | |
632 | if (histindex >= 0) printf_filtered ("$%d = ", histindex); | |
633 | ||
634 | print_formatted (val, format, fmt.size); | |
635 | printf_filtered ("\n"); | |
636 | ||
637 | if (cleanup) | |
638 | do_cleanups (old_chain); | |
639 | } | |
640 | ||
641 | static void | |
642 | output_command (exp) | |
643 | char *exp; | |
644 | { | |
645 | struct expression *expr; | |
646 | register struct cleanup *old_chain; | |
647 | register char format = 0; | |
648 | register value val; | |
649 | struct format_data fmt; | |
650 | ||
651 | if (exp && *exp == '/') | |
652 | { | |
653 | exp++; | |
654 | fmt = decode_format (&exp, 0, 0); | |
655 | validate_format (fmt, "print"); | |
656 | format = fmt.format; | |
657 | } | |
658 | ||
659 | expr = parse_c_expression (exp); | |
660 | old_chain = make_cleanup (free_current_contents, &expr); | |
661 | ||
662 | val = evaluate_expression (expr); | |
663 | ||
664 | print_formatted (val, format, fmt.size); | |
665 | ||
666 | do_cleanups (old_chain); | |
667 | } | |
668 | ||
669 | static void | |
670 | set_command (exp) | |
671 | char *exp; | |
672 | { | |
673 | struct expression *expr = parse_c_expression (exp); | |
674 | register struct cleanup *old_chain | |
675 | = make_cleanup (free_current_contents, &expr); | |
676 | evaluate_expression (expr); | |
677 | do_cleanups (old_chain); | |
678 | } | |
679 | ||
680 | static void | |
681 | address_info (exp) | |
682 | char *exp; | |
683 | { | |
684 | register struct symbol *sym; | |
685 | register CORE_ADDR val; | |
686 | int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero | |
687 | if exp is a field of `this'. */ | |
688 | ||
689 | if (exp == 0) | |
690 | error ("Argument required."); | |
691 | ||
692 | sym = lookup_symbol (exp, get_selected_block (), VAR_NAMESPACE, | |
693 | &is_a_field_of_this); | |
694 | if (sym == 0) | |
695 | { | |
696 | register int i; | |
697 | ||
698 | if (is_a_field_of_this) | |
699 | { | |
700 | printf ("Symbol \"%s\" is a field of the local class variable `this'\n", exp); | |
701 | return; | |
702 | } | |
703 | ||
704 | for (i = 0; i < misc_function_count; i++) | |
705 | if (!strcmp (misc_function_vector[i].name, exp)) | |
706 | break; | |
707 | ||
708 | if (i < misc_function_count) | |
709 | printf ("Symbol \"%s\" is at 0x%x in a file compiled without -g.\n", | |
710 | exp, misc_function_vector[i].address); | |
711 | else | |
712 | error ("No symbol \"%s\" in current context.", exp); | |
713 | return; | |
714 | } | |
715 | ||
716 | printf ("Symbol \"%s\" is ", SYMBOL_NAME (sym)); | |
717 | val = SYMBOL_VALUE (sym); | |
718 | ||
719 | switch (SYMBOL_CLASS (sym)) | |
720 | { | |
721 | case LOC_CONST: | |
722 | case LOC_CONST_BYTES: | |
723 | printf ("constant"); | |
724 | break; | |
725 | ||
726 | case LOC_LABEL: | |
727 | printf ("a label at address 0x%x", val); | |
728 | break; | |
729 | ||
730 | case LOC_REGISTER: | |
731 | printf ("a variable in register %s", reg_names[val]); | |
732 | break; | |
733 | ||
734 | case LOC_STATIC: | |
735 | printf ("static at address 0x%x", val); | |
736 | break; | |
737 | ||
738 | case LOC_REGPARM: | |
739 | printf ("an argument in register %s", reg_names[val]); | |
740 | break; | |
741 | ||
742 | case LOC_ARG: | |
743 | printf ("an argument at offset %d", val); | |
744 | break; | |
745 | ||
746 | case LOC_LOCAL: | |
747 | printf ("a local variable at frame offset %d", val); | |
748 | break; | |
749 | ||
750 | case LOC_REF_ARG: | |
751 | printf ("a reference argument at offset %d", val); | |
752 | break; | |
753 | ||
754 | case LOC_TYPEDEF: | |
755 | printf ("a typedef"); | |
756 | break; | |
757 | ||
758 | case LOC_BLOCK: | |
759 | printf ("a function at address 0x%x", | |
760 | BLOCK_START (SYMBOL_BLOCK_VALUE (sym))); | |
761 | break; | |
762 | } | |
763 | printf (".\n"); | |
764 | } | |
765 | \f | |
766 | static void | |
767 | x_command (exp, from_tty) | |
768 | char *exp; | |
769 | int from_tty; | |
770 | { | |
771 | struct expression *expr; | |
772 | struct format_data fmt; | |
773 | struct cleanup *old_chain; | |
774 | struct value *val; | |
775 | ||
776 | fmt.format = last_format; | |
777 | fmt.size = last_size; | |
778 | fmt.count = 1; | |
779 | ||
780 | if (exp && *exp == '/') | |
781 | { | |
782 | exp++; | |
783 | fmt = decode_format (&exp, last_format, last_size); | |
784 | last_size = fmt.size; | |
785 | last_format = fmt.format; | |
786 | } | |
787 | ||
788 | /* If we have an expression, evaluate it and use it as the address. */ | |
789 | ||
790 | if (exp != 0 && *exp != 0) | |
791 | { | |
792 | expr = parse_c_expression (exp); | |
793 | /* Cause expression not to be there any more | |
794 | if this command is repeated with Newline. | |
795 | But don't clobber a user-defined command's definition. */ | |
796 | if (from_tty) | |
797 | *exp = 0; | |
798 | old_chain = make_cleanup (free_current_contents, &expr); | |
799 | val = evaluate_expression (expr); | |
800 | /* In rvalue contexts, such as this, functions are coerced into | |
801 | pointers to functions. This makes "x/i main" work. */ | |
802 | if (/* last_format == 'i' | |
803 | && */ TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_FUNC | |
804 | && VALUE_LVAL (val) == lval_memory) | |
805 | next_address = VALUE_ADDRESS (val); | |
806 | else | |
807 | next_address = (CORE_ADDR) value_as_long (val); | |
808 | do_cleanups (old_chain); | |
809 | } | |
810 | ||
811 | do_examine (fmt, next_address); | |
812 | ||
813 | /* Set a couple of internal variables if appropriate. */ | |
814 | if (last_examine_value) | |
815 | { | |
816 | /* Make last address examined available to the user as $_. */ | |
817 | set_internalvar (lookup_internalvar ("_"), | |
818 | value_from_long (builtin_type_int, | |
819 | (LONGEST) last_examine_address)); | |
820 | ||
821 | /* Make contents of last address examined available to the user as $__.*/ | |
822 | set_internalvar (lookup_internalvar ("__"), last_examine_value); | |
823 | } | |
824 | } | |
825 | \f | |
826 | /* Commands for printing types of things. */ | |
827 | ||
828 | static void | |
829 | whatis_command (exp) | |
830 | char *exp; | |
831 | { | |
832 | struct expression *expr; | |
833 | register value val; | |
834 | register struct cleanup *old_chain; | |
835 | ||
836 | if (exp) | |
837 | { | |
838 | expr = parse_c_expression (exp); | |
839 | old_chain = make_cleanup (free_current_contents, &expr); | |
840 | val = evaluate_type (expr); | |
841 | } | |
842 | else | |
843 | val = access_value_history (0); | |
844 | ||
845 | printf_filtered ("type = "); | |
846 | /* Most of the time users do not want to see all the fields | |
847 | in a structure. If they do they can use the "ptype" command. | |
848 | Hence the "-1" below. */ | |
849 | type_print (VALUE_TYPE (val), "", stdout, -1); | |
850 | printf_filtered ("\n"); | |
851 | ||
852 | if (exp) | |
853 | do_cleanups (old_chain); | |
854 | } | |
855 | ||
856 | static void | |
857 | ptype_command (typename) | |
858 | char *typename; | |
859 | { | |
860 | register char *p = typename; | |
861 | register int len; | |
862 | extern struct block *get_current_block (); | |
863 | register struct block *b | |
864 | = (have_inferior_p () || have_core_file_p ()) ? get_current_block () : 0; | |
865 | register struct type *type; | |
866 | ||
867 | if (typename == 0) | |
868 | error_no_arg ("type name"); | |
869 | ||
870 | while (*p && *p != ' ' && *p != '\t') p++; | |
871 | len = p - typename; | |
872 | while (*p == ' ' || *p == '\t') p++; | |
873 | ||
874 | if (len == 6 && !strncmp (typename, "struct", 6)) | |
875 | type = lookup_struct (p, b); | |
876 | else if (len == 5 && !strncmp (typename, "union", 5)) | |
877 | type = lookup_union (p, b); | |
878 | else if (len == 4 && !strncmp (typename, "enum", 4)) | |
879 | type = lookup_enum (p, b); | |
880 | else | |
881 | { | |
882 | type = lookup_typename (typename, b, 1); | |
883 | if (type == 0) | |
884 | { | |
885 | register struct symbol *sym | |
886 | = lookup_symbol (typename, b, STRUCT_NAMESPACE, 0); | |
887 | if (sym == 0) | |
888 | error ("No type named %s.", typename); | |
889 | printf_filtered ("No type named %s, but there is a ", | |
890 | typename); | |
891 | switch (TYPE_CODE (SYMBOL_TYPE (sym))) | |
892 | { | |
893 | case TYPE_CODE_STRUCT: | |
894 | printf_filtered ("struct"); | |
895 | break; | |
896 | ||
897 | case TYPE_CODE_UNION: | |
898 | printf_filtered ("union"); | |
899 | break; | |
900 | ||
901 | case TYPE_CODE_ENUM: | |
902 | printf_filtered ("enum"); | |
903 | } | |
904 | printf_filtered (" %s. Type \"help ptype\".\n", typename); | |
905 | type = SYMBOL_TYPE (sym); | |
906 | } | |
907 | } | |
908 | ||
909 | type_print (type, "", stdout, 1); | |
910 | printf_filtered ("\n"); | |
911 | } | |
912 | \f | |
913 | enum display_status {disabled, enabled}; | |
914 | ||
915 | struct display | |
916 | { | |
917 | /* Chain link to next auto-display item. */ | |
918 | struct display *next; | |
919 | /* Expression to be evaluated and displayed. */ | |
920 | struct expression *exp; | |
921 | /* Item number of this auto-display item. */ | |
922 | int number; | |
923 | /* Display format specified. */ | |
924 | struct format_data format; | |
925 | /* Innermost block required by this expression when evaluated */ | |
926 | struct block *block; | |
927 | /* Status of this display (enabled or disabled) */ | |
928 | enum display_status status; | |
929 | }; | |
930 | ||
931 | /* Chain of expressions whose values should be displayed | |
932 | automatically each time the program stops. */ | |
933 | ||
934 | static struct display *display_chain; | |
935 | ||
936 | static int display_number; | |
937 | ||
938 | /* Add an expression to the auto-display chain. | |
939 | Specify the expression. */ | |
940 | ||
941 | static void | |
942 | display_command (exp, from_tty) | |
943 | char *exp; | |
944 | int from_tty; | |
945 | { | |
946 | struct format_data fmt; | |
947 | register struct expression *expr; | |
948 | register struct display *new; | |
949 | extern struct block *innermost_block; | |
950 | ||
951 | if (exp == 0) | |
952 | { | |
953 | do_displays (); | |
954 | return; | |
955 | } | |
956 | ||
957 | if (*exp == '/') | |
958 | { | |
959 | exp++; | |
960 | fmt = decode_format (&exp, 0, 0); | |
961 | if (fmt.size && fmt.format == 0) | |
962 | fmt.format = 'x'; | |
963 | if (fmt.format == 'i' || fmt.format == 's') | |
964 | fmt.size = 'b'; | |
965 | } | |
966 | else | |
967 | { | |
968 | fmt.format = 0; | |
969 | fmt.size = 0; | |
970 | fmt.count = 0; | |
971 | } | |
972 | ||
973 | innermost_block = 0; | |
974 | expr = parse_c_expression (exp); | |
975 | ||
976 | new = (struct display *) xmalloc (sizeof (struct display)); | |
977 | ||
978 | new->exp = expr; | |
979 | new->block = innermost_block; | |
980 | new->next = display_chain; | |
981 | new->number = ++display_number; | |
982 | new->format = fmt; | |
983 | new->status = enabled; | |
984 | display_chain = new; | |
985 | ||
986 | if (from_tty && have_inferior_p ()) | |
987 | do_one_display (new); | |
988 | ||
989 | dont_repeat (); | |
990 | } | |
991 | ||
992 | static void | |
993 | free_display (d) | |
994 | struct display *d; | |
995 | { | |
996 | free (d->exp); | |
997 | free (d); | |
998 | } | |
999 | ||
1000 | /* Clear out the display_chain. | |
1001 | Done when new symtabs are loaded, since this invalidates | |
1002 | the types stored in many expressions. */ | |
1003 | ||
1004 | void | |
1005 | clear_displays () | |
1006 | { | |
1007 | register struct display *d; | |
1008 | ||
1009 | while (d = display_chain) | |
1010 | { | |
1011 | free (d->exp); | |
1012 | display_chain = d->next; | |
1013 | free (d); | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | /* Delete the auto-display number NUM. */ | |
1018 | ||
1019 | void | |
1020 | delete_display (num) | |
1021 | int num; | |
1022 | { | |
1023 | register struct display *d1, *d; | |
1024 | ||
1025 | if (!display_chain) | |
1026 | error ("No display number %d.", num); | |
1027 | ||
1028 | if (display_chain->number == num) | |
1029 | { | |
1030 | d1 = display_chain; | |
1031 | display_chain = d1->next; | |
1032 | free_display (d1); | |
1033 | } | |
1034 | else | |
1035 | for (d = display_chain; ; d = d->next) | |
1036 | { | |
1037 | if (d->next == 0) | |
1038 | error ("No display number %d.", num); | |
1039 | if (d->next->number == num) | |
1040 | { | |
1041 | d1 = d->next; | |
1042 | d->next = d1->next; | |
1043 | free_display (d1); | |
1044 | break; | |
1045 | } | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | /* Delete some values from the auto-display chain. | |
1050 | Specify the element numbers. */ | |
1051 | ||
1052 | static void | |
1053 | undisplay_command (args) | |
1054 | char *args; | |
1055 | { | |
1056 | register char *p = args; | |
1057 | register char *p1; | |
1058 | register int num; | |
1059 | register struct display *d, *d1; | |
1060 | ||
1061 | if (args == 0) | |
1062 | { | |
1063 | if (query ("Delete all auto-display expressions? ")) | |
1064 | clear_displays (); | |
1065 | dont_repeat (); | |
1066 | return; | |
1067 | } | |
1068 | ||
1069 | while (*p) | |
1070 | { | |
1071 | p1 = p; | |
1072 | while (*p1 >= '0' && *p1 <= '9') p1++; | |
1073 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
1074 | error ("Arguments must be display numbers."); | |
1075 | ||
1076 | num = atoi (p); | |
1077 | ||
1078 | delete_display (num); | |
1079 | ||
1080 | p = p1; | |
1081 | while (*p == ' ' || *p == '\t') p++; | |
1082 | } | |
1083 | dont_repeat (); | |
1084 | } | |
1085 | ||
1086 | /* Display a single auto-display. | |
1087 | Do nothing if the display cannot be printed in the current context, | |
1088 | or if the display is disabled. */ | |
1089 | ||
1090 | static void | |
1091 | do_one_display (d) | |
1092 | struct display *d; | |
1093 | { | |
1094 | int within_current_scope; | |
1095 | ||
1096 | if (d->status == disabled) | |
1097 | return; | |
1098 | ||
1099 | if (d->block) | |
1100 | within_current_scope = contained_in (get_selected_block (), d->block); | |
1101 | else | |
1102 | within_current_scope = 1; | |
1103 | if (!within_current_scope) | |
1104 | return; | |
1105 | ||
1106 | current_display_number = d->number; | |
1107 | ||
1108 | printf_filtered ("%d: ", d->number); | |
1109 | if (d->format.size) | |
1110 | { | |
1111 | printf_filtered ("x/"); | |
1112 | if (d->format.count != 1) | |
1113 | printf_filtered ("%d", d->format.count); | |
1114 | printf_filtered ("%c", d->format.format); | |
1115 | if (d->format.format != 'i' && d->format.format != 's') | |
1116 | printf_filtered ("%c", d->format.size); | |
1117 | printf_filtered (" "); | |
1118 | print_expression (d->exp, stdout); | |
1119 | if (d->format.count != 1) | |
1120 | printf_filtered ("\n"); | |
1121 | else | |
1122 | printf_filtered (" "); | |
1123 | do_examine (d->format, | |
1124 | (CORE_ADDR) value_as_long (evaluate_expression (d->exp))); | |
1125 | ||
1126 | } | |
1127 | else | |
1128 | { | |
1129 | if (d->format.format) | |
1130 | printf_filtered ("/%c ", d->format.format); | |
1131 | print_expression (d->exp, stdout); | |
1132 | printf_filtered (" = "); | |
1133 | print_formatted (evaluate_expression (d->exp), | |
1134 | d->format.format, d->format.size); | |
1135 | printf_filtered ("\n"); | |
1136 | } | |
1137 | ||
1138 | fflush (stdout); | |
1139 | current_display_number = -1; | |
1140 | } | |
1141 | ||
1142 | /* Display all of the values on the auto-display chain which can be | |
1143 | evaluated in the current scope. */ | |
1144 | ||
1145 | void | |
1146 | do_displays () | |
1147 | { | |
1148 | register struct display *d; | |
1149 | ||
1150 | for (d = display_chain; d; d = d->next) | |
1151 | do_one_display (d); | |
1152 | } | |
1153 | ||
1154 | /* Delete the auto-display which we were in the process of displaying. | |
1155 | This is done when there is an error or a signal. */ | |
1156 | ||
1157 | void | |
1158 | disable_display (num) | |
1159 | int num; | |
1160 | { | |
1161 | register struct display *d; | |
1162 | ||
1163 | for (d = display_chain; d; d = d->next) | |
1164 | if (d->number == num) | |
1165 | { | |
1166 | d->status = disabled; | |
1167 | return; | |
1168 | } | |
1169 | printf ("No display number %d.\n", num); | |
1170 | } | |
1171 | ||
1172 | void | |
1173 | disable_current_display () | |
1174 | { | |
1175 | if (current_display_number >= 0) | |
1176 | { | |
1177 | disable_display (current_display_number); | |
1178 | fprintf (stderr, "Disabling display %d to avoid infinite recursion.\n", | |
1179 | current_display_number); | |
1180 | } | |
1181 | current_display_number = -1; | |
1182 | } | |
1183 | ||
1184 | static void | |
1185 | display_info () | |
1186 | { | |
1187 | register struct display *d; | |
1188 | ||
1189 | if (!display_chain) | |
1190 | printf ("There are no auto-display expressions now.\n"); | |
1191 | else | |
1192 | printf_filtered ("Auto-display expressions now in effect:\n\ | |
1193 | Num Enb Expression\n"); | |
1194 | ||
1195 | for (d = display_chain; d; d = d->next) | |
1196 | { | |
1197 | printf_filtered ("%d: %c ", d->number, "ny"[(int)d->status]); | |
1198 | if (d->format.size) | |
1199 | printf_filtered ("/%d%c%c ", d->format.count, d->format.size, | |
1200 | d->format.format); | |
1201 | else if (d->format.format) | |
1202 | printf_filtered ("/%c ", d->format.format); | |
1203 | print_expression (d->exp, stdout); | |
1204 | if (d->block && !contained_in (get_selected_block (), d->block)) | |
1205 | printf_filtered (" (cannot be evaluated in the current context)"); | |
1206 | printf_filtered ("\n"); | |
1207 | fflush (stdout); | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | void | |
1212 | enable_display (args) | |
1213 | char *args; | |
1214 | { | |
1215 | register char *p = args; | |
1216 | register char *p1; | |
1217 | register int num; | |
1218 | register struct display *d; | |
1219 | ||
1220 | if (p == 0) | |
1221 | { | |
1222 | for (d = display_chain; d; d = d->next) | |
1223 | d->status = enabled; | |
1224 | } | |
1225 | else | |
1226 | while (*p) | |
1227 | { | |
1228 | p1 = p; | |
1229 | while (*p1 >= '0' && *p1 <= '9') | |
1230 | p1++; | |
1231 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
1232 | error ("Arguments must be display numbers."); | |
1233 | ||
1234 | num = atoi (p); | |
1235 | ||
1236 | for (d = display_chain; d; d = d->next) | |
1237 | if (d->number == num) | |
1238 | { | |
1239 | d->status = enabled; | |
1240 | goto win; | |
1241 | } | |
1242 | printf ("No display number %d.\n", num); | |
1243 | win: | |
1244 | p = p1; | |
1245 | while (*p == ' ' || *p == '\t') | |
1246 | p++; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | void | |
1251 | disable_display_command (args, from_tty) | |
1252 | char *args; | |
1253 | int from_tty; | |
1254 | { | |
1255 | register char *p = args; | |
1256 | register char *p1; | |
1257 | register int num; | |
1258 | register struct display *d; | |
1259 | ||
1260 | if (p == 0) | |
1261 | { | |
1262 | for (d = display_chain; d; d = d->next) | |
1263 | d->status = disabled; | |
1264 | } | |
1265 | else | |
1266 | while (*p) | |
1267 | { | |
1268 | p1 = p; | |
1269 | while (*p1 >= '0' && *p1 <= '9') | |
1270 | p1++; | |
1271 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
1272 | error ("Arguments must be display numbers."); | |
1273 | ||
1274 | num = atoi (p); | |
1275 | ||
1276 | disable_display (atoi (p)); | |
1277 | ||
1278 | p = p1; | |
1279 | while (*p == ' ' || *p == '\t') | |
1280 | p++; | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | \f | |
1285 | /* Print the value in stack frame FRAME of a variable | |
1286 | specified by a struct symbol. */ | |
1287 | ||
1288 | void | |
1289 | print_variable_value (var, frame, stream) | |
1290 | struct symbol *var; | |
1291 | FRAME frame; | |
1292 | FILE *stream; | |
1293 | { | |
1294 | value val = read_var_value (var, frame); | |
1295 | value_print (val, stream, 0, Val_pretty_default); | |
1296 | } | |
1297 | ||
1298 | static int | |
1299 | compare_ints (i, j) | |
1300 | int *i, *j; | |
1301 | { | |
1302 | return *i - *j; | |
1303 | } | |
1304 | ||
1305 | /* Print the arguments of a stack frame, given the function FUNC | |
1306 | running in that frame (as a symbol), the info on the frame, | |
1307 | and the number of args according to the stack frame (or -1 if unknown). */ | |
1308 | ||
1309 | static void print_frame_nameless_args (); | |
1310 | ||
1311 | void | |
1312 | print_frame_args (func, fi, num, stream) | |
1313 | struct symbol *func; | |
1314 | struct frame_info *fi; | |
1315 | int num; | |
1316 | FILE *stream; | |
1317 | { | |
1318 | struct block *b; | |
1319 | int nsyms = 0; | |
1320 | int first = 1; | |
1321 | register int i; | |
1322 | register int last_regparm = 0; | |
1323 | register struct symbol *lastsym, *sym, *nextsym; | |
1324 | register value val; | |
1325 | /* Offset of stack argument that is at the highest offset. | |
1326 | -1 if we haven't come to a stack argument yet. */ | |
1327 | CORE_ADDR highest_offset = (CORE_ADDR) -1; | |
1328 | register CORE_ADDR addr = FRAME_ARGS_ADDRESS (fi); | |
1329 | ||
1330 | if (func) | |
1331 | { | |
1332 | b = SYMBOL_BLOCK_VALUE (func); | |
1333 | nsyms = BLOCK_NSYMS (b); | |
1334 | } | |
1335 | ||
1336 | for (i = 0; i < nsyms; i++) | |
1337 | { | |
1338 | QUIT; | |
1339 | sym = BLOCK_SYM (b, i); | |
1340 | ||
1341 | if (SYMBOL_CLASS (sym) != LOC_REGPARM | |
1342 | && SYMBOL_CLASS (sym) != LOC_ARG | |
1343 | && SYMBOL_CLASS (sym) != LOC_REF_ARG) | |
1344 | continue; | |
1345 | ||
1346 | /* Print the next arg. */ | |
1347 | if (SYMBOL_CLASS (sym) == LOC_REGPARM) | |
1348 | val = value_from_register (SYMBOL_TYPE (sym), | |
1349 | SYMBOL_VALUE (sym), | |
1350 | FRAME_INFO_ID (fi)); | |
1351 | else | |
1352 | { | |
1353 | int current_offset = SYMBOL_VALUE (sym); | |
1354 | int arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1355 | ||
1356 | if (SYMBOL_CLASS (sym) == LOC_REF_ARG) | |
1357 | val = value_at (SYMBOL_TYPE (sym), | |
1358 | read_memory_integer (addr + current_offset, | |
1359 | sizeof (CORE_ADDR))); | |
1360 | else | |
1361 | val = value_at (SYMBOL_TYPE (sym), addr + current_offset); | |
1362 | ||
1363 | /* Round up address of next arg to multiple of size of int. */ | |
1364 | current_offset | |
1365 | = (((current_offset + sizeof (int) - 1) / sizeof (int)) | |
1366 | * sizeof (int)); | |
1367 | ||
1368 | /* If this is the highest offset seen yet, set highest_offset. */ | |
1369 | if (highest_offset == (CORE_ADDR)-1 | |
1370 | || ((current_offset | |
1371 | + (arg_size - sizeof (int) + 3) / (sizeof (int))) | |
1372 | > highest_offset)) | |
1373 | highest_offset = current_offset; | |
1374 | } | |
1375 | ||
1376 | if (! first) | |
1377 | fprintf_filtered (stream, ", "); | |
1378 | fputs_filtered (SYMBOL_NAME (sym), stream); | |
1379 | fputs_filtered ("=", stream); | |
1380 | ||
1381 | /* Nonzero if a LOC_ARG which is a struct is useless. */ | |
1382 | #if !defined (STRUCT_ARG_SYM_GARBAGE) | |
1383 | #define STRUCT_ARG_SYM_GARBAGE(gcc_p) 0 | |
1384 | #endif | |
1385 | ||
1386 | if (STRUCT_ARG_SYM_GARBAGE (b->gcc_compile_flag) | |
1387 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT | |
1388 | && SYMBOL_CLASS (sym) == LOC_ARG) | |
1389 | { | |
1390 | /* Try looking up that name. SunOS4 puts out a usable | |
1391 | symbol as a local variable (in addition to the one | |
1392 | for the arg). */ | |
1393 | struct symbol *sym2 = | |
1394 | lookup_symbol (SYMBOL_NAME (sym), b, VAR_NAMESPACE, 0); | |
1395 | ||
1396 | if (sym2 != NULL) | |
1397 | val = value_of_variable (sym2); | |
1398 | else | |
1399 | { | |
1400 | fputs_filtered ("?", stream); | |
1401 | first = 0; | |
1402 | continue; | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | value_print (val, stream, 0, Val_no_prettyprint); | |
1407 | first = 0; | |
1408 | } | |
1409 | ||
1410 | /* Don't print nameless args in situations where we don't know | |
1411 | enough about the stack to find them. */ | |
1412 | if (num != -1) | |
1413 | { | |
1414 | if (highest_offset != (CORE_ADDR) -1 | |
1415 | && num * sizeof (int) + FRAME_ARGS_SKIP > highest_offset) | |
1416 | print_frame_nameless_args (fi, addr, | |
1417 | highest_offset + sizeof (int), | |
1418 | num * sizeof (int) + FRAME_ARGS_SKIP, | |
1419 | stream); | |
1420 | else | |
1421 | print_frame_nameless_args (fi, addr, FRAME_ARGS_SKIP, | |
1422 | num * sizeof (int) + FRAME_ARGS_SKIP, | |
1423 | stream); | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | static void | |
1428 | print_frame_nameless_args (fi, argsaddr, start, end, stream) | |
1429 | struct frame_info *fi; | |
1430 | CORE_ADDR argsaddr; | |
1431 | int start; | |
1432 | int end; | |
1433 | FILE *stream; | |
1434 | { | |
1435 | extern void (*default_scalar_print)(); | |
1436 | LONGEST v; | |
1437 | int p = start; | |
1438 | char *s = ""; | |
1439 | ||
1440 | for (p = start; p < end; p += sizeof(int)) { | |
1441 | QUIT; | |
1442 | #if defined(NAMELESS_ARG) | |
1443 | v = NAMELESS_ARG(fi, (p - start) / sizeof(int)); | |
1444 | #else | |
1445 | v = read_memory_integer (argsaddr + p, sizeof (int)); | |
1446 | #endif | |
1447 | fprintf_filtered (stream, s); | |
1448 | s = ", "; | |
1449 | (*default_scalar_print) (stream, builtin_type_int, v); | |
1450 | } | |
1451 | } | |
1452 | \f | |
1453 | static void | |
1454 | printf_command (arg) | |
1455 | char *arg; | |
1456 | { | |
1457 | register char *f; | |
1458 | register char *s = arg; | |
1459 | char *string; | |
1460 | value *val_args; | |
1461 | int nargs = 0; | |
1462 | int allocated_args = 20; | |
1463 | char *arg_bytes; | |
1464 | ||
1465 | val_args = (value *) xmalloc (allocated_args * sizeof (value)); | |
1466 | ||
1467 | if (s == 0) | |
1468 | error_no_arg ("format-control string and values to print"); | |
1469 | ||
1470 | /* Skip white space before format string */ | |
1471 | while (*s == ' ' || *s == '\t') s++; | |
1472 | ||
1473 | /* A format string should follow, enveloped in double quotes */ | |
1474 | if (*s++ != '"') | |
1475 | error ("Bad format string, missing '\"'."); | |
1476 | ||
1477 | /* Parse the format-control string and copy it into the string STRING, | |
1478 | processing some kinds of escape sequence. */ | |
1479 | ||
1480 | f = string = (char *) alloca (strlen (s) + 1); | |
1481 | while (*s != '"') | |
1482 | { | |
1483 | int c = *s++; | |
1484 | switch (c) | |
1485 | { | |
1486 | case '\0': | |
1487 | error ("Bad format string, non-terminated '\"'."); | |
1488 | /* doesn't return */ | |
1489 | ||
1490 | case '\\': | |
1491 | switch (c = *s++) | |
1492 | { | |
1493 | case '\\': | |
1494 | *f++ = '\\'; | |
1495 | break; | |
1496 | case 'n': | |
1497 | *f++ = '\n'; | |
1498 | break; | |
1499 | case 't': | |
1500 | *f++ = '\t'; | |
1501 | break; | |
1502 | case 'r': | |
1503 | *f++ = '\r'; | |
1504 | break; | |
1505 | case '"': | |
1506 | *f++ = '"'; | |
1507 | break; | |
1508 | default: | |
1509 | /* ??? TODO: handle other escape sequences */ | |
1510 | error ("Unrecognized \\ escape character in format string."); | |
1511 | } | |
1512 | break; | |
1513 | ||
1514 | default: | |
1515 | *f++ = c; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | /* Skip over " and following space and comma. */ | |
1520 | s++; | |
1521 | *f++ = '\0'; | |
1522 | while (*s == ' ' || *s == '\t') s++; | |
1523 | ||
1524 | if (*s != ',' && *s != 0) | |
1525 | error ("Invalid argument syntax"); | |
1526 | ||
1527 | if (*s == ',') s++; | |
1528 | while (*s == ' ' || *s == '\t') s++; | |
1529 | ||
1530 | { | |
1531 | /* Now scan the string for %-specs and see what kinds of args they want. | |
1532 | argclass[I] classifies the %-specs so we can give vprintf something | |
1533 | of the right size. */ | |
1534 | ||
1535 | enum argclass {int_arg, string_arg, double_arg, long_long_arg}; | |
1536 | enum argclass *argclass; | |
1537 | int nargs_wanted; | |
1538 | int argindex; | |
1539 | int lcount; | |
1540 | int i; | |
1541 | ||
1542 | argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass); | |
1543 | nargs_wanted = 0; | |
1544 | f = string; | |
1545 | while (*f) | |
1546 | if (*f++ == '%') | |
1547 | { | |
1548 | lcount = 0; | |
1549 | while (index ("0123456789.hlL-+ #", *f)) | |
1550 | { | |
1551 | if (*f == 'l' || *f == 'L') | |
1552 | lcount++; | |
1553 | f++; | |
1554 | } | |
1555 | if (*f == 's') | |
1556 | argclass[nargs_wanted++] = string_arg; | |
1557 | else if (*f == 'e' || *f == 'f' || *f == 'g') | |
1558 | argclass[nargs_wanted++] = double_arg; | |
1559 | else if (lcount > 1) | |
1560 | argclass[nargs_wanted++] = long_long_arg; | |
1561 | else if (*f != '%') | |
1562 | argclass[nargs_wanted++] = int_arg; | |
1563 | f++; | |
1564 | } | |
1565 | ||
1566 | /* Now, parse all arguments and evaluate them. | |
1567 | Store the VALUEs in VAL_ARGS. */ | |
1568 | ||
1569 | while (*s != '\0') | |
1570 | { | |
1571 | char *s1; | |
1572 | if (nargs == allocated_args) | |
1573 | val_args = (value *) xrealloc (val_args, | |
1574 | (allocated_args *= 2) | |
1575 | * sizeof (value)); | |
1576 | s1 = s; | |
1577 | val_args[nargs] = parse_to_comma_and_eval (&s1); | |
1578 | ||
1579 | /* If format string wants a float, unchecked-convert the value to | |
1580 | floating point of the same size */ | |
1581 | ||
1582 | if (argclass[nargs] == double_arg) | |
1583 | { | |
1584 | if (TYPE_LENGTH (VALUE_TYPE (val_args[nargs])) == sizeof (float)) | |
1585 | VALUE_TYPE (val_args[nargs]) = builtin_type_float; | |
1586 | if (TYPE_LENGTH (VALUE_TYPE (val_args[nargs])) == sizeof (double)) | |
1587 | VALUE_TYPE (val_args[nargs]) = builtin_type_double; | |
1588 | } | |
1589 | nargs++; | |
1590 | s = s1; | |
1591 | if (*s == ',') | |
1592 | s++; | |
1593 | } | |
1594 | ||
1595 | if (nargs != nargs_wanted) | |
1596 | error ("Wrong number of arguments for specified format-string"); | |
1597 | ||
1598 | /* Now lay out an argument-list containing the arguments | |
1599 | as doubles, integers and C pointers. */ | |
1600 | ||
1601 | arg_bytes = (char *) alloca (sizeof (double) * nargs); | |
1602 | argindex = 0; | |
1603 | for (i = 0; i < nargs; i++) | |
1604 | { | |
1605 | if (argclass[i] == string_arg) | |
1606 | { | |
1607 | char *str; | |
1608 | int tem, j; | |
1609 | tem = value_as_long (val_args[i]); | |
1610 | ||
1611 | /* This is a %s argument. Find the length of the string. */ | |
1612 | for (j = 0; ; j++) | |
1613 | { | |
1614 | char c; | |
1615 | QUIT; | |
1616 | read_memory (tem + j, &c, 1); | |
1617 | if (c == 0) | |
1618 | break; | |
1619 | } | |
1620 | ||
1621 | /* Copy the string contents into a string inside GDB. */ | |
1622 | str = (char *) alloca (j + 1); | |
1623 | read_memory (tem, str, j); | |
1624 | str[j] = 0; | |
1625 | ||
1626 | /* Pass address of internal copy as the arg to vprintf. */ | |
1627 | *((int *) &arg_bytes[argindex]) = (int) str; | |
1628 | argindex += sizeof (int); | |
1629 | } | |
1630 | else if (VALUE_TYPE (val_args[i])->code == TYPE_CODE_FLT) | |
1631 | { | |
1632 | *((double *) &arg_bytes[argindex]) = value_as_double (val_args[i]); | |
1633 | argindex += sizeof (double); | |
1634 | } | |
1635 | else | |
1636 | #ifdef LONG_LONG | |
1637 | if (argclass[i] == long_long_arg) | |
1638 | { | |
1639 | *(long long *) &arg_bytes[argindex] = value_as_long (val_args[i]); | |
1640 | argindex += sizeof (long long); | |
1641 | } | |
1642 | else | |
1643 | #endif | |
1644 | { | |
1645 | *((int *) &arg_bytes[argindex]) = value_as_long (val_args[i]); | |
1646 | argindex += sizeof (int); | |
1647 | } | |
1648 | } | |
1649 | } | |
1650 | vprintf (string, arg_bytes); | |
1651 | } | |
1652 | \f | |
1653 | /* Helper function for asdump_command. Finds the bounds of a function | |
1654 | for a specified section of text. PC is an address within the | |
1655 | function which you want bounds for; *LOW and *HIGH are set to the | |
1656 | beginning (inclusive) and end (exclusive) of the function. This | |
1657 | function returns 1 on success and 0 on failure. */ | |
1658 | ||
1659 | static int | |
1660 | containing_function_bounds (pc, low, high) | |
1661 | CORE_ADDR pc, *low, *high; | |
1662 | { | |
1663 | int scan; | |
1664 | ||
1665 | if (!find_pc_partial_function (pc, 0, low)) | |
1666 | return 0; | |
1667 | ||
1668 | scan = *low; | |
1669 | do { | |
1670 | scan++; | |
1671 | if (!find_pc_partial_function (scan, 0, high)) | |
1672 | return 0; | |
1673 | } while (*low == *high); | |
1674 | ||
1675 | return 1; | |
1676 | } | |
1677 | ||
1678 | /* Dump a specified section of assembly code. With no command line | |
1679 | arguments, this command will dump the assembly code for the | |
1680 | function surrounding the pc value in the selected frame. With one | |
1681 | argument, it will dump the assembly code surrounding that pc value. | |
1682 | Two arguments are interpeted as bounds within which to dump | |
1683 | assembly. */ | |
1684 | ||
1685 | static void | |
1686 | disassemble_command (arg, from_tty) | |
1687 | char *arg; | |
1688 | int from_tty; | |
1689 | { | |
1690 | CORE_ADDR low, high; | |
1691 | CORE_ADDR pc; | |
1692 | char *space_index; | |
1693 | ||
1694 | if (!arg) | |
1695 | { | |
1696 | if (!selected_frame) | |
1697 | error ("No frame selected.\n"); | |
1698 | ||
1699 | pc = get_frame_pc (selected_frame); | |
1700 | if (!containing_function_bounds (pc, &low, &high)) | |
1701 | error ("No function contains pc specified by selected frame.\n"); | |
1702 | } | |
1703 | else if (!(space_index = (char *) index (arg, ' '))) | |
1704 | { | |
1705 | /* One argument. */ | |
1706 | pc = parse_and_eval_address (arg); | |
1707 | if (!containing_function_bounds (pc, &low, &high)) | |
1708 | error ("No function contains specified pc.\n"); | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | /* Two arguments. */ | |
1713 | *space_index = '\0'; | |
1714 | low = parse_and_eval_address (arg); | |
1715 | high = parse_and_eval_address (space_index + 1); | |
1716 | } | |
1717 | ||
1718 | printf_filtered ("Dump of assembler code "); | |
1719 | if (!space_index) | |
1720 | { | |
1721 | char *name; | |
1722 | find_pc_partial_function (pc, &name, 0); | |
1723 | printf_filtered ("for function %s:\n", name); | |
1724 | } | |
1725 | else | |
1726 | printf_filtered ("from 0x%x to 0x%x:\n", low, high); | |
1727 | ||
1728 | /* Dump the specified range. */ | |
1729 | for (pc = low; pc < high; ) | |
1730 | { | |
1731 | QUIT; | |
1732 | print_address (pc, stdout); | |
1733 | printf_filtered (":\t"); | |
1734 | pc += print_insn (pc, stdout); | |
1735 | printf_filtered ("\n"); | |
1736 | } | |
1737 | printf_filtered ("End of assembler dump.\n"); | |
1738 | fflush (stdout); | |
1739 | } | |
1740 | ||
1741 | \f | |
1742 | extern struct cmd_list_element *enablelist, *disablelist, *deletelist; | |
1743 | extern struct cmd_list_element *cmdlist, *setlist; | |
1744 | ||
1745 | void | |
1746 | _initialize_printcmd () | |
1747 | { | |
1748 | current_display_number = -1; | |
1749 | ||
1750 | add_info ("address", address_info, | |
1751 | "Describe where variable VAR is stored."); | |
1752 | ||
1753 | add_com ("x", class_vars, x_command, | |
1754 | "Examine memory: x/FMT ADDRESS.\n\ | |
1755 | ADDRESS is an expression for the memory address to examine.\n\ | |
1756 | FMT is a repeat count followed by a format letter and a size letter.\n\ | |
1757 | Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ | |
1758 | f(float), a(address), i(instruction), c(char) and s(string).\n\ | |
1759 | Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ | |
1760 | g is meaningful only with f, for type double.\n\ | |
1761 | The specified number of objects of the specified size are printed\n\ | |
1762 | according to the format.\n\n\ | |
1763 | Defaults for format and size letters are those previously used.\n\ | |
1764 | Default count is 1. Default address is following last thing printed\n\ | |
1765 | with this command or \"print\"."); | |
1766 | ||
1767 | add_com ("disassemble", class_vars, disassemble_command, | |
1768 | "Disassemble a specified section of memory.\n\ | |
1769 | Default is the function surrounding the pc of the selected frame.\n\ | |
1770 | With a single argument, the function surrounding that address is dumped.\n\ | |
1771 | Two arguments are taken as a range of memory to dump."); | |
1772 | ||
1773 | add_com ("ptype", class_vars, ptype_command, | |
1774 | "Print definition of type TYPE.\n\ | |
1775 | Argument may be a type name defined by typedef, or \"struct STRUCTNAME\"\n\ | |
1776 | or \"union UNIONNAME\" or \"enum ENUMNAME\".\n\ | |
1777 | The selected stack frame's lexical context is used to look up the name."); | |
1778 | ||
1779 | add_com ("whatis", class_vars, whatis_command, | |
1780 | "Print data type of expression EXP."); | |
1781 | ||
1782 | add_info ("display", display_info, | |
1783 | "Expressions to display when program stops, with code numbers."); | |
1784 | ||
1785 | add_cmd ("undisplay", class_vars, undisplay_command, | |
1786 | "Cancel some expressions to be displayed when program stops.\n\ | |
1787 | Arguments are the code numbers of the expressions to stop displaying.\n\ | |
1788 | No argument means cancel all automatic-display expressions.\n\ | |
1789 | \"delete display\" has the same effect as this command.\n\ | |
1790 | Do \"info display\" to see current list of code numbers.", | |
1791 | &cmdlist); | |
1792 | ||
1793 | add_com ("display", class_vars, display_command, | |
1794 | "Print value of expression EXP each time the program stops.\n\ | |
1795 | /FMT may be used before EXP as in the \"print\" command.\n\ | |
1796 | /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\ | |
1797 | as in the \"x\" command, and then EXP is used to get the address to examine\n\ | |
1798 | and examining is done as in the \"x\" command.\n\n\ | |
1799 | With no argument, display all currently requested auto-display expressions.\n\ | |
1800 | Use \"undisplay\" to cancel display requests previously made."); | |
1801 | ||
1802 | add_cmd ("display", class_vars, enable_display, | |
1803 | "Enable some expressions to be displayed when program stops.\n\ | |
1804 | Arguments are the code numbers of the expressions to resume displaying.\n\ | |
1805 | No argument means enable all automatic-display expressions.\n\ | |
1806 | Do \"info display\" to see current list of code numbers.", &enablelist); | |
1807 | ||
1808 | add_cmd ("display", class_vars, disable_display_command, | |
1809 | "Disable some expressions to be displayed when program stops.\n\ | |
1810 | Arguments are the code numbers of the expressions to stop displaying.\n\ | |
1811 | No argument means disable all automatic-display expressions.\n\ | |
1812 | Do \"info display\" to see current list of code numbers.", &disablelist); | |
1813 | ||
1814 | add_cmd ("display", class_vars, undisplay_command, | |
1815 | "Cancel some expressions to be displayed when program stops.\n\ | |
1816 | Arguments are the code numbers of the expressions to stop displaying.\n\ | |
1817 | No argument means cancel all automatic-display expressions.\n\ | |
1818 | Do \"info display\" to see current list of code numbers.", &deletelist); | |
1819 | ||
1820 | add_com ("printf", class_vars, printf_command, | |
1821 | "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\ | |
1822 | This is useful for formatted output in user-defined commands."); | |
1823 | add_com ("output", class_vars, output_command, | |
1824 | "Like \"print\" but don't put in value history and don't print newline.\n\ | |
1825 | This is useful in user-defined commands."); | |
1826 | ||
1827 | add_prefix_cmd ("set", class_vars, set_command, | |
1828 | "Perform an assignment VAR = EXP.\n\ | |
1829 | You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\ | |
1830 | (names starting with $), a register (a few standard names starting with $),\n\ | |
1831 | or an actual variable in the program being debugged. EXP is any expression.\n\ | |
1832 | Use \"set variable\" for variables with names identical to set subcommands.\n\ | |
1833 | \nWith a subcommand, this command modifies parts of the gdb environment", | |
1834 | &setlist, "set ", 1, &cmdlist); | |
1835 | ||
1836 | add_cmd ("variable", class_vars, set_command, | |
1837 | "Perform an assignment VAR = EXP.\n\ | |
1838 | You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\ | |
1839 | (names starting with $), a register (a few standard names starting with $),\n\ | |
1840 | or an actual variable in the program being debugged. EXP is any expression.\n\ | |
1841 | This may usually be abbreviated to simply \"set\".", | |
1842 | &setlist); | |
1843 | ||
1844 | add_com ("print", class_vars, print_command, | |
1845 | concat ("Print value of expression EXP.\n\ | |
1846 | Variables accessible are those of the lexical environment of the selected\n\ | |
1847 | stack frame, plus all those whose scope is global or an entire file.\n\ | |
1848 | \n\ | |
1849 | $NUM gets previous value number NUM. $ and $$ are the last two values.\n\ | |
1850 | $$NUM refers to NUM'th value back from the last one.\n\ | |
1851 | Names starting with $ refer to registers (with the values they would have\n\ | |
1852 | if the program were to return to the stack frame now selected, restoring\n\ | |
1853 | all registers saved by frames farther in) or else to debugger\n\ | |
1854 | \"convenience\" variables (any such name not a known register).\n\ | |
1855 | Use assignment expressions to give values to convenience variables.\n", | |
1856 | "\n\ | |
1857 | \{TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\ | |
1858 | @ is a binary operator for treating consecutive data objects\n\ | |
1859 | anywhere in memory as an array. FOO@NUM gives an array whose first\n\ | |
1860 | element is FOO, whose second element is stored in the space following\n\ | |
1861 | where FOO is stored, etc. FOO must be an expression whose value\n\ | |
1862 | resides in memory.\n", | |
1863 | "\n\ | |
1864 | EXP may be preceded with /FMT, where FMT is a format letter\n\ | |
1865 | but no count or size letter (see \"x\" command).")); | |
1866 | add_com_alias ("p", "print", class_vars, 1); | |
1867 | } |