Commit | Line | Data |
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80629b1b | 1 | /* Memory attributes support, for GDB. |
14a5e767 AC |
2 | |
3 | Copyright 2001, 2002 Free Software Foundation, Inc. | |
80629b1b EZ |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
29e57380 C |
22 | #include "defs.h" |
23 | #include "command.h" | |
24 | #include "gdbcmd.h" | |
25 | #include "memattr.h" | |
26 | #include "target.h" | |
27 | #include "value.h" | |
28 | #include "language.h" | |
29 | #include "gdb_string.h" | |
30 | ||
29e57380 C |
31 | const struct mem_attrib default_mem_attrib = |
32 | { | |
33 | MEM_RW, /* mode */ | |
34 | MEM_WIDTH_UNSPECIFIED, | |
81a9a963 AC |
35 | 0, /* hwbreak */ |
36 | 0, /* cache */ | |
37 | 0 /* verify */ | |
29e57380 C |
38 | }; |
39 | ||
40 | static struct mem_region *mem_region_chain = NULL; | |
f4d650ec | 41 | static int mem_number = 0; |
29e57380 C |
42 | |
43 | static struct mem_region * | |
44 | create_mem_region (CORE_ADDR lo, CORE_ADDR hi, | |
45 | const struct mem_attrib *attrib) | |
46 | { | |
3172dc30 | 47 | struct mem_region *n, *new; |
29e57380 | 48 | |
b6d1a1d5 AC |
49 | /* lo == hi is a useless empty region */ |
50 | if (lo >= hi) | |
29e57380 | 51 | { |
b6d1a1d5 | 52 | printf_unfiltered ("invalid memory region: low >= high\n"); |
29e57380 C |
53 | return NULL; |
54 | } | |
55 | ||
56 | n = mem_region_chain; | |
57 | while (n) | |
58 | { | |
59 | /* overlapping node */ | |
b6d1a1d5 AC |
60 | if ((lo >= n->lo && lo < n->hi) || |
61 | (hi > n->lo && hi <= n->hi)) | |
29e57380 C |
62 | { |
63 | printf_unfiltered ("overlapping memory region\n"); | |
64 | return NULL; | |
65 | } | |
2ed3d0b5 | 66 | n = n->next; |
29e57380 C |
67 | } |
68 | ||
69 | new = xmalloc (sizeof (struct mem_region)); | |
70 | new->lo = lo; | |
71 | new->hi = hi; | |
72 | new->number = ++mem_number; | |
b5de0fa7 | 73 | new->enabled_p = 1; |
29e57380 C |
74 | new->attrib = *attrib; |
75 | ||
76 | /* link in new node */ | |
77 | new->next = mem_region_chain; | |
78 | mem_region_chain = new; | |
79 | ||
80 | return new; | |
81 | } | |
82 | ||
83 | static void | |
84 | delete_mem_region (struct mem_region *m) | |
85 | { | |
f4d650ec | 86 | xfree (m); |
29e57380 C |
87 | } |
88 | ||
89 | /* | |
90 | * Look up the memory region cooresponding to ADDR. | |
91 | */ | |
92 | struct mem_region * | |
93 | lookup_mem_region (CORE_ADDR addr) | |
94 | { | |
95 | static struct mem_region region; | |
96 | struct mem_region *m; | |
97 | CORE_ADDR lo; | |
98 | CORE_ADDR hi; | |
99 | ||
100 | /* First we initialize LO and HI so that they describe the entire | |
101 | memory space. As we process the memory region chain, they are | |
102 | redefined to describe the minimal region containing ADDR. LO | |
103 | and HI are used in the case where no memory region is defined | |
104 | that contains ADDR. If a memory region is disabled, it is | |
105 | treated as if it does not exist. */ | |
106 | ||
107 | lo = (CORE_ADDR) 0; | |
108 | hi = (CORE_ADDR) ~ 0; | |
109 | ||
110 | for (m = mem_region_chain; m; m = m->next) | |
111 | { | |
b5de0fa7 | 112 | if (m->enabled_p == 1) |
29e57380 C |
113 | { |
114 | if (addr >= m->lo && addr < m->hi) | |
115 | return m; | |
116 | ||
117 | if (addr >= m->hi && lo < m->hi) | |
118 | lo = m->hi; | |
119 | ||
120 | if (addr <= m->lo && hi > m->lo) | |
121 | hi = m->lo; | |
122 | } | |
123 | } | |
124 | ||
125 | /* Because no region was found, we must cons up one based on what | |
126 | was learned above. */ | |
127 | region.lo = lo; | |
128 | region.hi = hi; | |
129 | region.attrib = default_mem_attrib; | |
130 | return ®ion; | |
131 | } | |
132 | \f | |
133 | ||
134 | static void | |
135 | mem_command (char *args, int from_tty) | |
136 | { | |
137 | CORE_ADDR lo, hi; | |
138 | char *tok; | |
139 | struct mem_attrib attrib; | |
140 | ||
141 | if (!args) | |
142 | error_no_arg ("No mem"); | |
143 | ||
144 | tok = strtok (args, " \t"); | |
145 | if (!tok) | |
146 | error ("no lo address"); | |
147 | lo = parse_and_eval_address (tok); | |
148 | ||
149 | tok = strtok (NULL, " \t"); | |
150 | if (!tok) | |
151 | error ("no hi address"); | |
152 | hi = parse_and_eval_address (tok); | |
153 | ||
154 | attrib = default_mem_attrib; | |
155 | while ((tok = strtok (NULL, " \t")) != NULL) | |
156 | { | |
157 | if (strcmp (tok, "rw") == 0) | |
158 | attrib.mode = MEM_RW; | |
159 | else if (strcmp (tok, "ro") == 0) | |
160 | attrib.mode = MEM_RO; | |
161 | else if (strcmp (tok, "wo") == 0) | |
162 | attrib.mode = MEM_WO; | |
163 | ||
164 | else if (strcmp (tok, "8") == 0) | |
165 | attrib.width = MEM_WIDTH_8; | |
166 | else if (strcmp (tok, "16") == 0) | |
167 | { | |
168 | if ((lo % 2 != 0) || (hi % 2 != 0)) | |
169 | error ("region bounds not 16 bit aligned"); | |
170 | attrib.width = MEM_WIDTH_16; | |
171 | } | |
172 | else if (strcmp (tok, "32") == 0) | |
173 | { | |
174 | if ((lo % 4 != 0) || (hi % 4 != 0)) | |
175 | error ("region bounds not 32 bit aligned"); | |
176 | attrib.width = MEM_WIDTH_32; | |
177 | } | |
178 | else if (strcmp (tok, "64") == 0) | |
179 | { | |
180 | if ((lo % 8 != 0) || (hi % 8 != 0)) | |
181 | error ("region bounds not 64 bit aligned"); | |
182 | attrib.width = MEM_WIDTH_64; | |
183 | } | |
184 | ||
185 | #if 0 | |
186 | else if (strcmp (tok, "hwbreak") == 0) | |
81a9a963 | 187 | attrib.hwbreak = 1; |
29e57380 | 188 | else if (strcmp (tok, "swbreak") == 0) |
81a9a963 | 189 | attrib.hwbreak = 0; |
29e57380 C |
190 | #endif |
191 | ||
192 | else if (strcmp (tok, "cache") == 0) | |
81a9a963 | 193 | attrib.cache = 1; |
29e57380 | 194 | else if (strcmp (tok, "nocache") == 0) |
81a9a963 | 195 | attrib.cache = 0; |
29e57380 C |
196 | |
197 | #if 0 | |
198 | else if (strcmp (tok, "verify") == 0) | |
81a9a963 | 199 | attrib.verify = 1; |
29e57380 | 200 | else if (strcmp (tok, "noverify") == 0) |
81a9a963 | 201 | attrib.verify = 0; |
29e57380 C |
202 | #endif |
203 | ||
204 | else | |
205 | error ("unknown attribute: %s", tok); | |
206 | } | |
207 | ||
208 | create_mem_region (lo, hi, &attrib); | |
209 | } | |
210 | \f | |
211 | ||
212 | static void | |
213 | mem_info_command (char *args, int from_tty) | |
214 | { | |
215 | struct mem_region *m; | |
216 | struct mem_attrib *attrib; | |
217 | ||
218 | if (!mem_region_chain) | |
219 | { | |
220 | printf_unfiltered ("There are no memory regions defined.\n"); | |
221 | return; | |
222 | } | |
223 | ||
ab35b611 EZ |
224 | printf_filtered ("Num "); |
225 | printf_filtered ("Enb "); | |
226 | printf_filtered ("Low Addr "); | |
227 | if (TARGET_ADDR_BIT > 32) | |
228 | printf_filtered (" "); | |
229 | printf_filtered ("High Addr "); | |
230 | if (TARGET_ADDR_BIT > 32) | |
231 | printf_filtered (" "); | |
232 | printf_filtered ("Attrs "); | |
233 | printf_filtered ("\n"); | |
234 | ||
29e57380 C |
235 | for (m = mem_region_chain; m; m = m->next) |
236 | { | |
ab35b611 EZ |
237 | char *tmp; |
238 | printf_filtered ("%-3d %-3c\t", | |
29e57380 | 239 | m->number, |
b5de0fa7 | 240 | m->enabled_p ? 'y' : 'n'); |
ab35b611 | 241 | if (TARGET_ADDR_BIT <= 32) |
14a5e767 | 242 | tmp = local_hex_string_custom ((unsigned long) m->lo, "08l"); |
ab35b611 | 243 | else |
14a5e767 | 244 | tmp = local_hex_string_custom ((unsigned long) m->lo, "016l"); |
ab35b611 EZ |
245 | |
246 | printf_filtered ("%s ", tmp); | |
247 | ||
248 | if (TARGET_ADDR_BIT <= 32) | |
14a5e767 | 249 | tmp = local_hex_string_custom ((unsigned long) m->hi, "08l"); |
ab35b611 | 250 | else |
14a5e767 | 251 | tmp = local_hex_string_custom ((unsigned long) m->hi, "016l"); |
ab35b611 EZ |
252 | |
253 | printf_filtered ("%s ", tmp); | |
29e57380 C |
254 | |
255 | /* Print a token for each attribute. | |
256 | ||
257 | * FIXME: Should we output a comma after each token? It may | |
258 | * make it easier for users to read, but we'd lose the ability | |
259 | * to cut-and-paste the list of attributes when defining a new | |
260 | * region. Perhaps that is not important. | |
261 | * | |
262 | * FIXME: If more attributes are added to GDB, the output may | |
263 | * become cluttered and difficult for users to read. At that | |
264 | * time, we may want to consider printing tokens only if they | |
265 | * are different from the default attribute. */ | |
266 | ||
267 | attrib = &m->attrib; | |
268 | switch (attrib->mode) | |
269 | { | |
270 | case MEM_RW: | |
271 | printf_filtered ("rw "); | |
272 | break; | |
273 | case MEM_RO: | |
274 | printf_filtered ("ro "); | |
275 | break; | |
276 | case MEM_WO: | |
277 | printf_filtered ("wo "); | |
278 | break; | |
279 | } | |
280 | ||
281 | switch (attrib->width) | |
282 | { | |
283 | case MEM_WIDTH_8: | |
284 | printf_filtered ("8 "); | |
285 | break; | |
286 | case MEM_WIDTH_16: | |
287 | printf_filtered ("16 "); | |
288 | break; | |
289 | case MEM_WIDTH_32: | |
290 | printf_filtered ("32 "); | |
291 | break; | |
292 | case MEM_WIDTH_64: | |
293 | printf_filtered ("64 "); | |
294 | break; | |
295 | case MEM_WIDTH_UNSPECIFIED: | |
296 | break; | |
297 | } | |
298 | ||
299 | #if 0 | |
300 | if (attrib->hwbreak) | |
301 | printf_filtered ("hwbreak"); | |
302 | else | |
303 | printf_filtered ("swbreak"); | |
304 | #endif | |
305 | ||
306 | if (attrib->cache) | |
307 | printf_filtered ("cache "); | |
308 | else | |
309 | printf_filtered ("nocache "); | |
310 | ||
311 | #if 0 | |
312 | if (attrib->verify) | |
313 | printf_filtered ("verify "); | |
314 | else | |
315 | printf_filtered ("noverify "); | |
316 | #endif | |
317 | ||
318 | printf_filtered ("\n"); | |
319 | ||
320 | gdb_flush (gdb_stdout); | |
321 | } | |
322 | } | |
323 | \f | |
324 | ||
325 | /* Enable the memory region number NUM. */ | |
326 | ||
327 | static void | |
328 | mem_enable (int num) | |
329 | { | |
330 | struct mem_region *m; | |
331 | ||
332 | for (m = mem_region_chain; m; m = m->next) | |
333 | if (m->number == num) | |
334 | { | |
b5de0fa7 | 335 | m->enabled_p = 1; |
29e57380 C |
336 | return; |
337 | } | |
338 | printf_unfiltered ("No memory region number %d.\n", num); | |
339 | } | |
340 | ||
341 | static void | |
342 | mem_enable_command (char *args, int from_tty) | |
343 | { | |
344 | char *p = args; | |
345 | char *p1; | |
346 | int num; | |
347 | struct mem_region *m; | |
348 | ||
349 | dcache_invalidate (target_dcache); | |
350 | ||
351 | if (p == 0) | |
352 | { | |
353 | for (m = mem_region_chain; m; m = m->next) | |
b5de0fa7 | 354 | m->enabled_p = 1; |
29e57380 C |
355 | } |
356 | else | |
357 | while (*p) | |
358 | { | |
359 | p1 = p; | |
360 | while (*p1 >= '0' && *p1 <= '9') | |
361 | p1++; | |
362 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
363 | error ("Arguments must be memory region numbers."); | |
364 | ||
365 | num = atoi (p); | |
366 | mem_enable (num); | |
367 | ||
368 | p = p1; | |
369 | while (*p == ' ' || *p == '\t') | |
370 | p++; | |
371 | } | |
372 | } | |
373 | \f | |
374 | ||
375 | /* Disable the memory region number NUM. */ | |
376 | ||
377 | static void | |
378 | mem_disable (int num) | |
379 | { | |
380 | struct mem_region *m; | |
381 | ||
382 | for (m = mem_region_chain; m; m = m->next) | |
383 | if (m->number == num) | |
384 | { | |
b5de0fa7 | 385 | m->enabled_p = 0; |
29e57380 C |
386 | return; |
387 | } | |
388 | printf_unfiltered ("No memory region number %d.\n", num); | |
389 | } | |
390 | ||
391 | static void | |
392 | mem_disable_command (char *args, int from_tty) | |
393 | { | |
394 | char *p = args; | |
395 | char *p1; | |
396 | int num; | |
397 | struct mem_region *m; | |
398 | ||
399 | dcache_invalidate (target_dcache); | |
400 | ||
401 | if (p == 0) | |
402 | { | |
403 | for (m = mem_region_chain; m; m = m->next) | |
b5de0fa7 | 404 | m->enabled_p = 0; |
29e57380 C |
405 | } |
406 | else | |
407 | while (*p) | |
408 | { | |
409 | p1 = p; | |
410 | while (*p1 >= '0' && *p1 <= '9') | |
411 | p1++; | |
412 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
413 | error ("Arguments must be memory region numbers."); | |
414 | ||
415 | num = atoi (p); | |
416 | mem_disable (num); | |
417 | ||
418 | p = p1; | |
419 | while (*p == ' ' || *p == '\t') | |
420 | p++; | |
421 | } | |
422 | } | |
423 | ||
424 | /* Clear memory region list */ | |
425 | ||
426 | static void | |
427 | mem_clear (void) | |
428 | { | |
429 | struct mem_region *m; | |
430 | ||
431 | while ((m = mem_region_chain) != 0) | |
432 | { | |
433 | mem_region_chain = m->next; | |
434 | delete_mem_region (m); | |
435 | } | |
436 | } | |
437 | ||
438 | /* Delete the memory region number NUM. */ | |
439 | ||
440 | static void | |
441 | mem_delete (int num) | |
442 | { | |
443 | struct mem_region *m1, *m; | |
444 | ||
445 | if (!mem_region_chain) | |
446 | { | |
447 | printf_unfiltered ("No memory region number %d.\n", num); | |
448 | return; | |
449 | } | |
450 | ||
451 | if (mem_region_chain->number == num) | |
452 | { | |
453 | m1 = mem_region_chain; | |
454 | mem_region_chain = m1->next; | |
455 | delete_mem_region (m1); | |
456 | } | |
457 | else | |
458 | for (m = mem_region_chain; m->next; m = m->next) | |
459 | { | |
460 | if (m->next->number == num) | |
461 | { | |
462 | m1 = m->next; | |
463 | m->next = m1->next; | |
464 | delete_mem_region (m1); | |
465 | break; | |
466 | } | |
467 | } | |
468 | } | |
469 | ||
470 | static void | |
471 | mem_delete_command (char *args, int from_tty) | |
472 | { | |
473 | char *p = args; | |
474 | char *p1; | |
475 | int num; | |
476 | ||
477 | dcache_invalidate (target_dcache); | |
478 | ||
479 | if (p == 0) | |
480 | { | |
481 | if (query ("Delete all memory regions? ")) | |
482 | mem_clear (); | |
483 | dont_repeat (); | |
484 | return; | |
485 | } | |
486 | ||
487 | while (*p) | |
488 | { | |
489 | p1 = p; | |
490 | while (*p1 >= '0' && *p1 <= '9') | |
491 | p1++; | |
492 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
493 | error ("Arguments must be memory region numbers."); | |
494 | ||
495 | num = atoi (p); | |
496 | mem_delete (num); | |
497 | ||
498 | p = p1; | |
499 | while (*p == ' ' || *p == '\t') | |
500 | p++; | |
501 | } | |
502 | ||
503 | dont_repeat (); | |
504 | } | |
505 | \f | |
506 | void | |
507 | _initialize_mem () | |
508 | { | |
509 | add_com ("mem", class_vars, mem_command, | |
ab35b611 | 510 | "Define attributes for memory region.\n\ |
f9ba0717 MS |
511 | Usage: mem <lo addr> <hi addr> [<mode> <width> <cache>], \n\ |
512 | where <mode> may be rw (read/write), ro (read-only) or wo (write-only), \n\ | |
513 | <width> may be 8, 16, 32, or 64, and \n\ | |
514 | <cache> may be cache or nocache"); | |
29e57380 C |
515 | |
516 | add_cmd ("mem", class_vars, mem_enable_command, | |
517 | "Enable memory region.\n\ | |
518 | Arguments are the code numbers of the memory regions to enable.\n\ | |
ab35b611 | 519 | Usage: enable mem <code number>\n\ |
29e57380 C |
520 | Do \"info mem\" to see current list of code numbers.", &enablelist); |
521 | ||
522 | add_cmd ("mem", class_vars, mem_disable_command, | |
523 | "Disable memory region.\n\ | |
524 | Arguments are the code numbers of the memory regions to disable.\n\ | |
ab35b611 | 525 | Usage: disable mem <code number>\n\ |
29e57380 C |
526 | Do \"info mem\" to see current list of code numbers.", &disablelist); |
527 | ||
528 | add_cmd ("mem", class_vars, mem_delete_command, | |
529 | "Delete memory region.\n\ | |
530 | Arguments are the code numbers of the memory regions to delete.\n\ | |
ab35b611 | 531 | Usage: delete mem <code number>\n\ |
29e57380 C |
532 | Do \"info mem\" to see current list of code numbers.", &deletelist); |
533 | ||
534 | add_info ("mem", mem_info_command, | |
535 | "Memory region attributes"); | |
536 | } |