| 1 | /* Memory attributes support, for GDB. |
| 2 | |
| 3 | Copyright (C) 2001, 2002 Free Software Foundation, Inc. |
| 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., 51 Franklin Street, Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 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 | |
| 31 | const struct mem_attrib default_mem_attrib = |
| 32 | { |
| 33 | MEM_RW, /* mode */ |
| 34 | MEM_WIDTH_UNSPECIFIED, |
| 35 | 0, /* hwbreak */ |
| 36 | 0, /* cache */ |
| 37 | 0 /* verify */ |
| 38 | }; |
| 39 | |
| 40 | static struct mem_region *mem_region_chain = NULL; |
| 41 | static int mem_number = 0; |
| 42 | |
| 43 | static struct mem_region * |
| 44 | create_mem_region (CORE_ADDR lo, CORE_ADDR hi, |
| 45 | const struct mem_attrib *attrib) |
| 46 | { |
| 47 | struct mem_region *n, *new; |
| 48 | |
| 49 | /* lo == hi is a useless empty region */ |
| 50 | if (lo >= hi && hi != 0) |
| 51 | { |
| 52 | printf_unfiltered (_("invalid memory region: low >= high\n")); |
| 53 | return NULL; |
| 54 | } |
| 55 | |
| 56 | n = mem_region_chain; |
| 57 | while (n) |
| 58 | { |
| 59 | /* overlapping node */ |
| 60 | if ((lo >= n->lo && (lo < n->hi || n->hi == 0)) |
| 61 | || (hi > n->lo && (hi <= n->hi || n->hi == 0)) |
| 62 | || (lo <= n->lo && (hi >= n->hi || hi == 0))) |
| 63 | { |
| 64 | printf_unfiltered (_("overlapping memory region\n")); |
| 65 | return NULL; |
| 66 | } |
| 67 | n = n->next; |
| 68 | } |
| 69 | |
| 70 | new = xmalloc (sizeof (struct mem_region)); |
| 71 | new->lo = lo; |
| 72 | new->hi = hi; |
| 73 | new->number = ++mem_number; |
| 74 | new->enabled_p = 1; |
| 75 | new->attrib = *attrib; |
| 76 | |
| 77 | /* link in new node */ |
| 78 | new->next = mem_region_chain; |
| 79 | mem_region_chain = new; |
| 80 | |
| 81 | return new; |
| 82 | } |
| 83 | |
| 84 | static void |
| 85 | delete_mem_region (struct mem_region *m) |
| 86 | { |
| 87 | xfree (m); |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * Look up the memory region cooresponding to ADDR. |
| 92 | */ |
| 93 | struct mem_region * |
| 94 | lookup_mem_region (CORE_ADDR addr) |
| 95 | { |
| 96 | static struct mem_region region; |
| 97 | struct mem_region *m; |
| 98 | CORE_ADDR lo; |
| 99 | CORE_ADDR hi; |
| 100 | |
| 101 | /* First we initialize LO and HI so that they describe the entire |
| 102 | memory space. As we process the memory region chain, they are |
| 103 | redefined to describe the minimal region containing ADDR. LO |
| 104 | and HI are used in the case where no memory region is defined |
| 105 | that contains ADDR. If a memory region is disabled, it is |
| 106 | treated as if it does not exist. */ |
| 107 | |
| 108 | lo = (CORE_ADDR) 0; |
| 109 | hi = (CORE_ADDR) ~ 0; |
| 110 | |
| 111 | for (m = mem_region_chain; m; m = m->next) |
| 112 | { |
| 113 | if (m->enabled_p == 1) |
| 114 | { |
| 115 | if (addr >= m->lo && (addr < m->hi || m->hi == 0)) |
| 116 | return m; |
| 117 | |
| 118 | if (addr >= m->hi && lo < m->hi) |
| 119 | lo = m->hi; |
| 120 | |
| 121 | if (addr <= m->lo && hi > m->lo) |
| 122 | hi = m->lo; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | /* Because no region was found, we must cons up one based on what |
| 127 | was learned above. */ |
| 128 | region.lo = lo; |
| 129 | region.hi = hi; |
| 130 | region.attrib = default_mem_attrib; |
| 131 | return ®ion; |
| 132 | } |
| 133 | \f |
| 134 | |
| 135 | static void |
| 136 | mem_command (char *args, int from_tty) |
| 137 | { |
| 138 | CORE_ADDR lo, hi; |
| 139 | char *tok; |
| 140 | struct mem_attrib attrib; |
| 141 | |
| 142 | if (!args) |
| 143 | error_no_arg (_("No mem")); |
| 144 | |
| 145 | tok = strtok (args, " \t"); |
| 146 | if (!tok) |
| 147 | error (_("no lo address")); |
| 148 | lo = parse_and_eval_address (tok); |
| 149 | |
| 150 | tok = strtok (NULL, " \t"); |
| 151 | if (!tok) |
| 152 | error (_("no hi address")); |
| 153 | hi = parse_and_eval_address (tok); |
| 154 | |
| 155 | attrib = default_mem_attrib; |
| 156 | while ((tok = strtok (NULL, " \t")) != NULL) |
| 157 | { |
| 158 | if (strcmp (tok, "rw") == 0) |
| 159 | attrib.mode = MEM_RW; |
| 160 | else if (strcmp (tok, "ro") == 0) |
| 161 | attrib.mode = MEM_RO; |
| 162 | else if (strcmp (tok, "wo") == 0) |
| 163 | attrib.mode = MEM_WO; |
| 164 | |
| 165 | else if (strcmp (tok, "8") == 0) |
| 166 | attrib.width = MEM_WIDTH_8; |
| 167 | else if (strcmp (tok, "16") == 0) |
| 168 | { |
| 169 | if ((lo % 2 != 0) || (hi % 2 != 0)) |
| 170 | error (_("region bounds not 16 bit aligned")); |
| 171 | attrib.width = MEM_WIDTH_16; |
| 172 | } |
| 173 | else if (strcmp (tok, "32") == 0) |
| 174 | { |
| 175 | if ((lo % 4 != 0) || (hi % 4 != 0)) |
| 176 | error (_("region bounds not 32 bit aligned")); |
| 177 | attrib.width = MEM_WIDTH_32; |
| 178 | } |
| 179 | else if (strcmp (tok, "64") == 0) |
| 180 | { |
| 181 | if ((lo % 8 != 0) || (hi % 8 != 0)) |
| 182 | error (_("region bounds not 64 bit aligned")); |
| 183 | attrib.width = MEM_WIDTH_64; |
| 184 | } |
| 185 | |
| 186 | #if 0 |
| 187 | else if (strcmp (tok, "hwbreak") == 0) |
| 188 | attrib.hwbreak = 1; |
| 189 | else if (strcmp (tok, "swbreak") == 0) |
| 190 | attrib.hwbreak = 0; |
| 191 | #endif |
| 192 | |
| 193 | else if (strcmp (tok, "cache") == 0) |
| 194 | attrib.cache = 1; |
| 195 | else if (strcmp (tok, "nocache") == 0) |
| 196 | attrib.cache = 0; |
| 197 | |
| 198 | #if 0 |
| 199 | else if (strcmp (tok, "verify") == 0) |
| 200 | attrib.verify = 1; |
| 201 | else if (strcmp (tok, "noverify") == 0) |
| 202 | attrib.verify = 0; |
| 203 | #endif |
| 204 | |
| 205 | else |
| 206 | error (_("unknown attribute: %s"), tok); |
| 207 | } |
| 208 | |
| 209 | create_mem_region (lo, hi, &attrib); |
| 210 | } |
| 211 | \f |
| 212 | |
| 213 | static void |
| 214 | mem_info_command (char *args, int from_tty) |
| 215 | { |
| 216 | struct mem_region *m; |
| 217 | struct mem_attrib *attrib; |
| 218 | |
| 219 | if (!mem_region_chain) |
| 220 | { |
| 221 | printf_unfiltered (_("There are no memory regions defined.\n")); |
| 222 | return; |
| 223 | } |
| 224 | |
| 225 | printf_filtered ("Num "); |
| 226 | printf_filtered ("Enb "); |
| 227 | printf_filtered ("Low Addr "); |
| 228 | if (TARGET_ADDR_BIT > 32) |
| 229 | printf_filtered (" "); |
| 230 | printf_filtered ("High Addr "); |
| 231 | if (TARGET_ADDR_BIT > 32) |
| 232 | printf_filtered (" "); |
| 233 | printf_filtered ("Attrs "); |
| 234 | printf_filtered ("\n"); |
| 235 | |
| 236 | for (m = mem_region_chain; m; m = m->next) |
| 237 | { |
| 238 | char *tmp; |
| 239 | printf_filtered ("%-3d %-3c\t", |
| 240 | m->number, |
| 241 | m->enabled_p ? 'y' : 'n'); |
| 242 | if (TARGET_ADDR_BIT <= 32) |
| 243 | tmp = hex_string_custom ((unsigned long) m->lo, 8); |
| 244 | else |
| 245 | tmp = hex_string_custom ((unsigned long) m->lo, 16); |
| 246 | |
| 247 | printf_filtered ("%s ", tmp); |
| 248 | |
| 249 | if (TARGET_ADDR_BIT <= 32) |
| 250 | { |
| 251 | if (m->hi == 0) |
| 252 | tmp = "0x100000000"; |
| 253 | else |
| 254 | tmp = hex_string_custom ((unsigned long) m->hi, 8); |
| 255 | } |
| 256 | else |
| 257 | { |
| 258 | if (m->hi == 0) |
| 259 | tmp = "0x10000000000000000"; |
| 260 | else |
| 261 | tmp = hex_string_custom ((unsigned long) m->hi, 16); |
| 262 | } |
| 263 | |
| 264 | printf_filtered ("%s ", tmp); |
| 265 | |
| 266 | /* Print a token for each attribute. |
| 267 | |
| 268 | * FIXME: Should we output a comma after each token? It may |
| 269 | * make it easier for users to read, but we'd lose the ability |
| 270 | * to cut-and-paste the list of attributes when defining a new |
| 271 | * region. Perhaps that is not important. |
| 272 | * |
| 273 | * FIXME: If more attributes are added to GDB, the output may |
| 274 | * become cluttered and difficult for users to read. At that |
| 275 | * time, we may want to consider printing tokens only if they |
| 276 | * are different from the default attribute. */ |
| 277 | |
| 278 | attrib = &m->attrib; |
| 279 | switch (attrib->mode) |
| 280 | { |
| 281 | case MEM_RW: |
| 282 | printf_filtered ("rw "); |
| 283 | break; |
| 284 | case MEM_RO: |
| 285 | printf_filtered ("ro "); |
| 286 | break; |
| 287 | case MEM_WO: |
| 288 | printf_filtered ("wo "); |
| 289 | break; |
| 290 | } |
| 291 | |
| 292 | switch (attrib->width) |
| 293 | { |
| 294 | case MEM_WIDTH_8: |
| 295 | printf_filtered ("8 "); |
| 296 | break; |
| 297 | case MEM_WIDTH_16: |
| 298 | printf_filtered ("16 "); |
| 299 | break; |
| 300 | case MEM_WIDTH_32: |
| 301 | printf_filtered ("32 "); |
| 302 | break; |
| 303 | case MEM_WIDTH_64: |
| 304 | printf_filtered ("64 "); |
| 305 | break; |
| 306 | case MEM_WIDTH_UNSPECIFIED: |
| 307 | break; |
| 308 | } |
| 309 | |
| 310 | #if 0 |
| 311 | if (attrib->hwbreak) |
| 312 | printf_filtered ("hwbreak"); |
| 313 | else |
| 314 | printf_filtered ("swbreak"); |
| 315 | #endif |
| 316 | |
| 317 | if (attrib->cache) |
| 318 | printf_filtered ("cache "); |
| 319 | else |
| 320 | printf_filtered ("nocache "); |
| 321 | |
| 322 | #if 0 |
| 323 | if (attrib->verify) |
| 324 | printf_filtered ("verify "); |
| 325 | else |
| 326 | printf_filtered ("noverify "); |
| 327 | #endif |
| 328 | |
| 329 | printf_filtered ("\n"); |
| 330 | |
| 331 | gdb_flush (gdb_stdout); |
| 332 | } |
| 333 | } |
| 334 | \f |
| 335 | |
| 336 | /* Enable the memory region number NUM. */ |
| 337 | |
| 338 | static void |
| 339 | mem_enable (int num) |
| 340 | { |
| 341 | struct mem_region *m; |
| 342 | |
| 343 | for (m = mem_region_chain; m; m = m->next) |
| 344 | if (m->number == num) |
| 345 | { |
| 346 | m->enabled_p = 1; |
| 347 | return; |
| 348 | } |
| 349 | printf_unfiltered (_("No memory region number %d.\n"), num); |
| 350 | } |
| 351 | |
| 352 | static void |
| 353 | mem_enable_command (char *args, int from_tty) |
| 354 | { |
| 355 | char *p = args; |
| 356 | char *p1; |
| 357 | int num; |
| 358 | struct mem_region *m; |
| 359 | |
| 360 | dcache_invalidate (target_dcache); |
| 361 | |
| 362 | if (p == 0) |
| 363 | { |
| 364 | for (m = mem_region_chain; m; m = m->next) |
| 365 | m->enabled_p = 1; |
| 366 | } |
| 367 | else |
| 368 | while (*p) |
| 369 | { |
| 370 | p1 = p; |
| 371 | while (*p1 >= '0' && *p1 <= '9') |
| 372 | p1++; |
| 373 | if (*p1 && *p1 != ' ' && *p1 != '\t') |
| 374 | error (_("Arguments must be memory region numbers.")); |
| 375 | |
| 376 | num = atoi (p); |
| 377 | mem_enable (num); |
| 378 | |
| 379 | p = p1; |
| 380 | while (*p == ' ' || *p == '\t') |
| 381 | p++; |
| 382 | } |
| 383 | } |
| 384 | \f |
| 385 | |
| 386 | /* Disable the memory region number NUM. */ |
| 387 | |
| 388 | static void |
| 389 | mem_disable (int num) |
| 390 | { |
| 391 | struct mem_region *m; |
| 392 | |
| 393 | for (m = mem_region_chain; m; m = m->next) |
| 394 | if (m->number == num) |
| 395 | { |
| 396 | m->enabled_p = 0; |
| 397 | return; |
| 398 | } |
| 399 | printf_unfiltered (_("No memory region number %d.\n"), num); |
| 400 | } |
| 401 | |
| 402 | static void |
| 403 | mem_disable_command (char *args, int from_tty) |
| 404 | { |
| 405 | char *p = args; |
| 406 | char *p1; |
| 407 | int num; |
| 408 | struct mem_region *m; |
| 409 | |
| 410 | dcache_invalidate (target_dcache); |
| 411 | |
| 412 | if (p == 0) |
| 413 | { |
| 414 | for (m = mem_region_chain; m; m = m->next) |
| 415 | m->enabled_p = 0; |
| 416 | } |
| 417 | else |
| 418 | while (*p) |
| 419 | { |
| 420 | p1 = p; |
| 421 | while (*p1 >= '0' && *p1 <= '9') |
| 422 | p1++; |
| 423 | if (*p1 && *p1 != ' ' && *p1 != '\t') |
| 424 | error (_("Arguments must be memory region numbers.")); |
| 425 | |
| 426 | num = atoi (p); |
| 427 | mem_disable (num); |
| 428 | |
| 429 | p = p1; |
| 430 | while (*p == ' ' || *p == '\t') |
| 431 | p++; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | /* Clear memory region list */ |
| 436 | |
| 437 | static void |
| 438 | mem_clear (void) |
| 439 | { |
| 440 | struct mem_region *m; |
| 441 | |
| 442 | while ((m = mem_region_chain) != 0) |
| 443 | { |
| 444 | mem_region_chain = m->next; |
| 445 | delete_mem_region (m); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | /* Delete the memory region number NUM. */ |
| 450 | |
| 451 | static void |
| 452 | mem_delete (int num) |
| 453 | { |
| 454 | struct mem_region *m1, *m; |
| 455 | |
| 456 | if (!mem_region_chain) |
| 457 | { |
| 458 | printf_unfiltered (_("No memory region number %d.\n"), num); |
| 459 | return; |
| 460 | } |
| 461 | |
| 462 | if (mem_region_chain->number == num) |
| 463 | { |
| 464 | m1 = mem_region_chain; |
| 465 | mem_region_chain = m1->next; |
| 466 | delete_mem_region (m1); |
| 467 | } |
| 468 | else |
| 469 | for (m = mem_region_chain; m->next; m = m->next) |
| 470 | { |
| 471 | if (m->next->number == num) |
| 472 | { |
| 473 | m1 = m->next; |
| 474 | m->next = m1->next; |
| 475 | delete_mem_region (m1); |
| 476 | break; |
| 477 | } |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | static void |
| 482 | mem_delete_command (char *args, int from_tty) |
| 483 | { |
| 484 | char *p = args; |
| 485 | char *p1; |
| 486 | int num; |
| 487 | |
| 488 | dcache_invalidate (target_dcache); |
| 489 | |
| 490 | if (p == 0) |
| 491 | { |
| 492 | if (query ("Delete all memory regions? ")) |
| 493 | mem_clear (); |
| 494 | dont_repeat (); |
| 495 | return; |
| 496 | } |
| 497 | |
| 498 | while (*p) |
| 499 | { |
| 500 | p1 = p; |
| 501 | while (*p1 >= '0' && *p1 <= '9') |
| 502 | p1++; |
| 503 | if (*p1 && *p1 != ' ' && *p1 != '\t') |
| 504 | error (_("Arguments must be memory region numbers.")); |
| 505 | |
| 506 | num = atoi (p); |
| 507 | mem_delete (num); |
| 508 | |
| 509 | p = p1; |
| 510 | while (*p == ' ' || *p == '\t') |
| 511 | p++; |
| 512 | } |
| 513 | |
| 514 | dont_repeat (); |
| 515 | } |
| 516 | \f |
| 517 | extern initialize_file_ftype _initialize_mem; /* -Wmissing-prototype */ |
| 518 | |
| 519 | void |
| 520 | _initialize_mem (void) |
| 521 | { |
| 522 | add_com ("mem", class_vars, mem_command, _("\ |
| 523 | Define attributes for memory region.\n\ |
| 524 | Usage: mem <lo addr> <hi addr> [<mode> <width> <cache>], \n\ |
| 525 | where <mode> may be rw (read/write), ro (read-only) or wo (write-only), \n\ |
| 526 | <width> may be 8, 16, 32, or 64, and \n\ |
| 527 | <cache> may be cache or nocache")); |
| 528 | |
| 529 | add_cmd ("mem", class_vars, mem_enable_command, _("\ |
| 530 | Enable memory region.\n\ |
| 531 | Arguments are the code numbers of the memory regions to enable.\n\ |
| 532 | Usage: enable mem <code number>\n\ |
| 533 | Do \"info mem\" to see current list of code numbers."), &enablelist); |
| 534 | |
| 535 | add_cmd ("mem", class_vars, mem_disable_command, _("\ |
| 536 | Disable memory region.\n\ |
| 537 | Arguments are the code numbers of the memory regions to disable.\n\ |
| 538 | Usage: disable mem <code number>\n\ |
| 539 | Do \"info mem\" to see current list of code numbers."), &disablelist); |
| 540 | |
| 541 | add_cmd ("mem", class_vars, mem_delete_command, _("\ |
| 542 | Delete memory region.\n\ |
| 543 | Arguments are the code numbers of the memory regions to delete.\n\ |
| 544 | Usage: delete mem <code number>\n\ |
| 545 | Do \"info mem\" to see current list of code numbers."), &deletelist); |
| 546 | |
| 547 | add_info ("mem", mem_info_command, |
| 548 | _("Memory region attributes")); |
| 549 | } |