| 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001, |
| 4 | 2002, 2004, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "inferior.h" |
| 23 | #include "target.h" |
| 24 | #include "gdbarch.h" |
| 25 | #include "gdbcmd.h" |
| 26 | #include "regcache.h" |
| 27 | #include "reggroups.h" |
| 28 | #include "gdb_assert.h" |
| 29 | #include "gdb_string.h" |
| 30 | #include "gdbcmd.h" /* For maintenanceprintlist. */ |
| 31 | #include "observer.h" |
| 32 | |
| 33 | /* |
| 34 | * DATA STRUCTURE |
| 35 | * |
| 36 | * Here is the actual register cache. |
| 37 | */ |
| 38 | |
| 39 | /* Per-architecture object describing the layout of a register cache. |
| 40 | Computed once when the architecture is created. */ |
| 41 | |
| 42 | struct gdbarch_data *regcache_descr_handle; |
| 43 | |
| 44 | struct regcache_descr |
| 45 | { |
| 46 | /* The architecture this descriptor belongs to. */ |
| 47 | struct gdbarch *gdbarch; |
| 48 | |
| 49 | /* The raw register cache. Each raw (or hard) register is supplied |
| 50 | by the target interface. The raw cache should not contain |
| 51 | redundant information - if the PC is constructed from two |
| 52 | registers then those registers and not the PC lives in the raw |
| 53 | cache. */ |
| 54 | int nr_raw_registers; |
| 55 | long sizeof_raw_registers; |
| 56 | long sizeof_raw_register_valid_p; |
| 57 | |
| 58 | /* The cooked register space. Each cooked register in the range |
| 59 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw |
| 60 | register. The remaining [NR_RAW_REGISTERS |
| 61 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
| 62 | both raw registers and memory by the architecture methods |
| 63 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
| 64 | int nr_cooked_registers; |
| 65 | long sizeof_cooked_registers; |
| 66 | long sizeof_cooked_register_valid_p; |
| 67 | |
| 68 | /* Offset and size (in 8 bit bytes), of reach register in the |
| 69 | register cache. All registers (including those in the range |
| 70 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. |
| 71 | Assigning all registers an offset makes it possible to keep |
| 72 | legacy code, such as that found in read_register_bytes() and |
| 73 | write_register_bytes() working. */ |
| 74 | long *register_offset; |
| 75 | long *sizeof_register; |
| 76 | |
| 77 | /* Cached table containing the type of each register. */ |
| 78 | struct type **register_type; |
| 79 | }; |
| 80 | |
| 81 | static void * |
| 82 | init_regcache_descr (struct gdbarch *gdbarch) |
| 83 | { |
| 84 | int i; |
| 85 | struct regcache_descr *descr; |
| 86 | gdb_assert (gdbarch != NULL); |
| 87 | |
| 88 | /* Create an initial, zero filled, table. */ |
| 89 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
| 90 | descr->gdbarch = gdbarch; |
| 91 | |
| 92 | /* Total size of the register space. The raw registers are mapped |
| 93 | directly onto the raw register cache while the pseudo's are |
| 94 | either mapped onto raw-registers or memory. */ |
| 95 | descr->nr_cooked_registers = gdbarch_num_regs (gdbarch) |
| 96 | + gdbarch_num_pseudo_regs (gdbarch); |
| 97 | descr->sizeof_cooked_register_valid_p = gdbarch_num_regs (gdbarch) |
| 98 | + gdbarch_num_pseudo_regs |
| 99 | (gdbarch); |
| 100 | |
| 101 | /* Fill in a table of register types. */ |
| 102 | descr->register_type |
| 103 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
| 104 | struct type *); |
| 105 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 106 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
| 107 | |
| 108 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
| 109 | into the register cache. */ |
| 110 | descr->nr_raw_registers = gdbarch_num_regs (gdbarch); |
| 111 | |
| 112 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p |
| 113 | array. This pretects GDB from erant code that accesses elements |
| 114 | of the global register_valid_p[] array in the range |
| 115 | [gdbarch_num_regs .. gdbarch_num_regs + gdbarch_num_pseudo_regs). */ |
| 116 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
| 117 | |
| 118 | /* Lay out the register cache. |
| 119 | |
| 120 | NOTE: cagney/2002-05-22: Only register_type() is used when |
| 121 | constructing the register cache. It is assumed that the |
| 122 | register's raw size, virtual size and type length are all the |
| 123 | same. */ |
| 124 | |
| 125 | { |
| 126 | long offset = 0; |
| 127 | |
| 128 | descr->sizeof_register |
| 129 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 130 | descr->register_offset |
| 131 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 132 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 133 | { |
| 134 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
| 135 | descr->register_offset[i] = offset; |
| 136 | offset += descr->sizeof_register[i]; |
| 137 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
| 138 | } |
| 139 | /* Set the real size of the register cache buffer. */ |
| 140 | descr->sizeof_cooked_registers = offset; |
| 141 | } |
| 142 | |
| 143 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
| 144 | the raw registers. Unfortunately some code still accesses the |
| 145 | register array directly using the global registers[]. Until that |
| 146 | code has been purged, play safe and over allocating the register |
| 147 | buffer. Ulgh! */ |
| 148 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; |
| 149 | |
| 150 | return descr; |
| 151 | } |
| 152 | |
| 153 | static struct regcache_descr * |
| 154 | regcache_descr (struct gdbarch *gdbarch) |
| 155 | { |
| 156 | return gdbarch_data (gdbarch, regcache_descr_handle); |
| 157 | } |
| 158 | |
| 159 | /* Utility functions returning useful register attributes stored in |
| 160 | the regcache descr. */ |
| 161 | |
| 162 | struct type * |
| 163 | register_type (struct gdbarch *gdbarch, int regnum) |
| 164 | { |
| 165 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 166 | |
| 167 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 168 | return descr->register_type[regnum]; |
| 169 | } |
| 170 | |
| 171 | /* Utility functions returning useful register attributes stored in |
| 172 | the regcache descr. */ |
| 173 | |
| 174 | int |
| 175 | register_size (struct gdbarch *gdbarch, int regnum) |
| 176 | { |
| 177 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 178 | int size; |
| 179 | |
| 180 | gdb_assert (regnum >= 0 |
| 181 | && regnum < (gdbarch_num_regs (gdbarch) |
| 182 | + gdbarch_num_pseudo_regs (gdbarch))); |
| 183 | size = descr->sizeof_register[regnum]; |
| 184 | return size; |
| 185 | } |
| 186 | |
| 187 | /* The register cache for storing raw register values. */ |
| 188 | |
| 189 | struct regcache |
| 190 | { |
| 191 | struct regcache_descr *descr; |
| 192 | |
| 193 | /* The address space of this register cache (for registers where it |
| 194 | makes sense, like PC or SP). */ |
| 195 | struct address_space *aspace; |
| 196 | |
| 197 | /* The register buffers. A read-only register cache can hold the |
| 198 | full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write |
| 199 | register cache can only hold [0 .. gdbarch_num_regs). */ |
| 200 | gdb_byte *registers; |
| 201 | /* Register cache status: |
| 202 | register_valid_p[REG] == 0 if REG value is not in the cache |
| 203 | > 0 if REG value is in the cache |
| 204 | < 0 if REG value is permanently unavailable */ |
| 205 | signed char *register_valid_p; |
| 206 | /* Is this a read-only cache? A read-only cache is used for saving |
| 207 | the target's register state (e.g, across an inferior function |
| 208 | call or just before forcing a function return). A read-only |
| 209 | cache can only be updated via the methods regcache_dup() and |
| 210 | regcache_cpy(). The actual contents are determined by the |
| 211 | reggroup_save and reggroup_restore methods. */ |
| 212 | int readonly_p; |
| 213 | /* If this is a read-write cache, which thread's registers is |
| 214 | it connected to? */ |
| 215 | ptid_t ptid; |
| 216 | }; |
| 217 | |
| 218 | struct regcache * |
| 219 | regcache_xmalloc (struct gdbarch *gdbarch, struct address_space *aspace) |
| 220 | { |
| 221 | struct regcache_descr *descr; |
| 222 | struct regcache *regcache; |
| 223 | |
| 224 | gdb_assert (gdbarch != NULL); |
| 225 | descr = regcache_descr (gdbarch); |
| 226 | regcache = XMALLOC (struct regcache); |
| 227 | regcache->descr = descr; |
| 228 | regcache->registers |
| 229 | = XCALLOC (descr->sizeof_raw_registers, gdb_byte); |
| 230 | regcache->register_valid_p |
| 231 | = XCALLOC (descr->sizeof_raw_register_valid_p, gdb_byte); |
| 232 | regcache->aspace = aspace; |
| 233 | regcache->readonly_p = 1; |
| 234 | regcache->ptid = minus_one_ptid; |
| 235 | return regcache; |
| 236 | } |
| 237 | |
| 238 | void |
| 239 | regcache_xfree (struct regcache *regcache) |
| 240 | { |
| 241 | if (regcache == NULL) |
| 242 | return; |
| 243 | xfree (regcache->registers); |
| 244 | xfree (regcache->register_valid_p); |
| 245 | xfree (regcache); |
| 246 | } |
| 247 | |
| 248 | static void |
| 249 | do_regcache_xfree (void *data) |
| 250 | { |
| 251 | regcache_xfree (data); |
| 252 | } |
| 253 | |
| 254 | struct cleanup * |
| 255 | make_cleanup_regcache_xfree (struct regcache *regcache) |
| 256 | { |
| 257 | return make_cleanup (do_regcache_xfree, regcache); |
| 258 | } |
| 259 | |
| 260 | /* Return REGCACHE's architecture. */ |
| 261 | |
| 262 | struct gdbarch * |
| 263 | get_regcache_arch (const struct regcache *regcache) |
| 264 | { |
| 265 | return regcache->descr->gdbarch; |
| 266 | } |
| 267 | |
| 268 | struct address_space * |
| 269 | get_regcache_aspace (const struct regcache *regcache) |
| 270 | { |
| 271 | return regcache->aspace; |
| 272 | } |
| 273 | |
| 274 | /* Return a pointer to register REGNUM's buffer cache. */ |
| 275 | |
| 276 | static gdb_byte * |
| 277 | register_buffer (const struct regcache *regcache, int regnum) |
| 278 | { |
| 279 | return regcache->registers + regcache->descr->register_offset[regnum]; |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
| 284 | void *src) |
| 285 | { |
| 286 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 287 | gdb_byte buf[MAX_REGISTER_SIZE]; |
| 288 | int regnum; |
| 289 | |
| 290 | /* The DST should be `read-only', if it wasn't then the save would |
| 291 | end up trying to write the register values back out to the |
| 292 | target. */ |
| 293 | gdb_assert (dst->readonly_p); |
| 294 | /* Clear the dest. */ |
| 295 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); |
| 296 | memset (dst->register_valid_p, 0, |
| 297 | dst->descr->sizeof_cooked_register_valid_p); |
| 298 | /* Copy over any registers (identified by their membership in the |
| 299 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
| 300 | gdbarch_num_pseudo_regs) range is checked since some architectures need |
| 301 | to save/restore `cooked' registers that live in memory. */ |
| 302 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 303 | { |
| 304 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) |
| 305 | { |
| 306 | int valid = cooked_read (src, regnum, buf); |
| 307 | |
| 308 | if (valid) |
| 309 | { |
| 310 | memcpy (register_buffer (dst, regnum), buf, |
| 311 | register_size (gdbarch, regnum)); |
| 312 | dst->register_valid_p[regnum] = 1; |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | void |
| 319 | regcache_restore (struct regcache *dst, |
| 320 | regcache_cooked_read_ftype *cooked_read, |
| 321 | void *cooked_read_context) |
| 322 | { |
| 323 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 324 | gdb_byte buf[MAX_REGISTER_SIZE]; |
| 325 | int regnum; |
| 326 | |
| 327 | /* The dst had better not be read-only. If it is, the `restore' |
| 328 | doesn't make much sense. */ |
| 329 | gdb_assert (!dst->readonly_p); |
| 330 | /* Copy over any registers, being careful to only restore those that |
| 331 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
| 332 | + gdbarch_num_pseudo_regs) range is checked since some architectures need |
| 333 | to save/restore `cooked' registers that live in memory. */ |
| 334 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 335 | { |
| 336 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
| 337 | { |
| 338 | int valid = cooked_read (cooked_read_context, regnum, buf); |
| 339 | |
| 340 | if (valid) |
| 341 | regcache_cooked_write (dst, regnum, buf); |
| 342 | } |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | static int |
| 347 | do_cooked_read (void *src, int regnum, gdb_byte *buf) |
| 348 | { |
| 349 | struct regcache *regcache = src; |
| 350 | |
| 351 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
| 352 | /* Don't even think about fetching a register from a read-only |
| 353 | cache when the register isn't yet valid. There isn't a target |
| 354 | from which the register value can be fetched. */ |
| 355 | return 0; |
| 356 | regcache_cooked_read (regcache, regnum, buf); |
| 357 | return 1; |
| 358 | } |
| 359 | |
| 360 | |
| 361 | void |
| 362 | regcache_cpy (struct regcache *dst, struct regcache *src) |
| 363 | { |
| 364 | gdb_assert (src != NULL && dst != NULL); |
| 365 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 366 | gdb_assert (src != dst); |
| 367 | gdb_assert (src->readonly_p || dst->readonly_p); |
| 368 | |
| 369 | if (!src->readonly_p) |
| 370 | regcache_save (dst, do_cooked_read, src); |
| 371 | else if (!dst->readonly_p) |
| 372 | regcache_restore (dst, do_cooked_read, src); |
| 373 | else |
| 374 | regcache_cpy_no_passthrough (dst, src); |
| 375 | } |
| 376 | |
| 377 | void |
| 378 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) |
| 379 | { |
| 380 | gdb_assert (src != NULL && dst != NULL); |
| 381 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 382 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough |
| 383 | move of data into the current regcache. Doing this would be |
| 384 | silly - it would mean that valid_p would be completely invalid. */ |
| 385 | gdb_assert (dst->readonly_p); |
| 386 | |
| 387 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
| 388 | memcpy (dst->register_valid_p, src->register_valid_p, |
| 389 | dst->descr->sizeof_raw_register_valid_p); |
| 390 | } |
| 391 | |
| 392 | struct regcache * |
| 393 | regcache_dup (struct regcache *src) |
| 394 | { |
| 395 | struct regcache *newbuf; |
| 396 | |
| 397 | newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src)); |
| 398 | regcache_cpy (newbuf, src); |
| 399 | return newbuf; |
| 400 | } |
| 401 | |
| 402 | struct regcache * |
| 403 | regcache_dup_no_passthrough (struct regcache *src) |
| 404 | { |
| 405 | struct regcache *newbuf; |
| 406 | |
| 407 | newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src)); |
| 408 | regcache_cpy_no_passthrough (newbuf, src); |
| 409 | return newbuf; |
| 410 | } |
| 411 | |
| 412 | int |
| 413 | regcache_valid_p (const struct regcache *regcache, int regnum) |
| 414 | { |
| 415 | gdb_assert (regcache != NULL); |
| 416 | gdb_assert (regnum >= 0); |
| 417 | if (regcache->readonly_p) |
| 418 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 419 | else |
| 420 | gdb_assert (regnum < regcache->descr->nr_raw_registers); |
| 421 | |
| 422 | return regcache->register_valid_p[regnum]; |
| 423 | } |
| 424 | |
| 425 | void |
| 426 | regcache_invalidate (struct regcache *regcache, int regnum) |
| 427 | { |
| 428 | gdb_assert (regcache != NULL); |
| 429 | gdb_assert (regnum >= 0); |
| 430 | gdb_assert (!regcache->readonly_p); |
| 431 | gdb_assert (regnum < regcache->descr->nr_raw_registers); |
| 432 | regcache->register_valid_p[regnum] = 0; |
| 433 | } |
| 434 | |
| 435 | |
| 436 | /* Global structure containing the current regcache. */ |
| 437 | |
| 438 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
| 439 | recording if the register values have been changed (eg. by the |
| 440 | user). Therefore all registers must be written back to the |
| 441 | target when appropriate. */ |
| 442 | |
| 443 | struct regcache_list |
| 444 | { |
| 445 | struct regcache *regcache; |
| 446 | struct regcache_list *next; |
| 447 | }; |
| 448 | |
| 449 | static struct regcache_list *current_regcache; |
| 450 | |
| 451 | struct regcache * |
| 452 | get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) |
| 453 | { |
| 454 | struct regcache_list *list; |
| 455 | struct regcache *new_regcache; |
| 456 | |
| 457 | for (list = current_regcache; list; list = list->next) |
| 458 | if (ptid_equal (list->regcache->ptid, ptid) |
| 459 | && get_regcache_arch (list->regcache) == gdbarch) |
| 460 | return list->regcache; |
| 461 | |
| 462 | new_regcache = regcache_xmalloc (gdbarch, |
| 463 | target_thread_address_space (ptid)); |
| 464 | new_regcache->readonly_p = 0; |
| 465 | new_regcache->ptid = ptid; |
| 466 | gdb_assert (new_regcache->aspace != NULL); |
| 467 | |
| 468 | list = xmalloc (sizeof (struct regcache_list)); |
| 469 | list->regcache = new_regcache; |
| 470 | list->next = current_regcache; |
| 471 | current_regcache = list; |
| 472 | |
| 473 | return new_regcache; |
| 474 | } |
| 475 | |
| 476 | static ptid_t current_thread_ptid; |
| 477 | static struct gdbarch *current_thread_arch; |
| 478 | |
| 479 | struct regcache * |
| 480 | get_thread_regcache (ptid_t ptid) |
| 481 | { |
| 482 | if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid)) |
| 483 | { |
| 484 | current_thread_ptid = ptid; |
| 485 | current_thread_arch = target_thread_architecture (ptid); |
| 486 | } |
| 487 | |
| 488 | return get_thread_arch_regcache (ptid, current_thread_arch); |
| 489 | } |
| 490 | |
| 491 | struct regcache * |
| 492 | get_current_regcache (void) |
| 493 | { |
| 494 | return get_thread_regcache (inferior_ptid); |
| 495 | } |
| 496 | |
| 497 | |
| 498 | /* Observer for the target_changed event. */ |
| 499 | |
| 500 | static void |
| 501 | regcache_observer_target_changed (struct target_ops *target) |
| 502 | { |
| 503 | registers_changed (); |
| 504 | } |
| 505 | |
| 506 | /* Update global variables old ptids to hold NEW_PTID if they were |
| 507 | holding OLD_PTID. */ |
| 508 | static void |
| 509 | regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) |
| 510 | { |
| 511 | struct regcache_list *list; |
| 512 | |
| 513 | for (list = current_regcache; list; list = list->next) |
| 514 | if (ptid_equal (list->regcache->ptid, old_ptid)) |
| 515 | list->regcache->ptid = new_ptid; |
| 516 | } |
| 517 | |
| 518 | /* Low level examining and depositing of registers. |
| 519 | |
| 520 | The caller is responsible for making sure that the inferior is |
| 521 | stopped before calling the fetching routines, or it will get |
| 522 | garbage. (a change from GDB version 3, in which the caller got the |
| 523 | value from the last stop). */ |
| 524 | |
| 525 | /* REGISTERS_CHANGED () |
| 526 | |
| 527 | Indicate that registers may have changed, so invalidate the cache. */ |
| 528 | |
| 529 | void |
| 530 | registers_changed_ptid (ptid_t ptid) |
| 531 | { |
| 532 | struct regcache_list *list, **list_link; |
| 533 | |
| 534 | list = current_regcache; |
| 535 | list_link = ¤t_regcache; |
| 536 | while (list) |
| 537 | { |
| 538 | if (ptid_match (list->regcache->ptid, ptid)) |
| 539 | { |
| 540 | struct regcache_list *dead = list; |
| 541 | |
| 542 | *list_link = list->next; |
| 543 | regcache_xfree (list->regcache); |
| 544 | list = *list_link; |
| 545 | xfree (dead); |
| 546 | continue; |
| 547 | } |
| 548 | |
| 549 | list_link = &list->next; |
| 550 | list = *list_link; |
| 551 | } |
| 552 | |
| 553 | current_regcache = NULL; |
| 554 | |
| 555 | current_thread_ptid = null_ptid; |
| 556 | current_thread_arch = NULL; |
| 557 | |
| 558 | /* Need to forget about any frames we have cached, too. */ |
| 559 | reinit_frame_cache (); |
| 560 | |
| 561 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 562 | a builtin alloca. This particular call is used to clean up |
| 563 | areas allocated by low level target code which may build up |
| 564 | during lengthy interactions between gdb and the target before |
| 565 | gdb gives control to the user (ie watchpoints). */ |
| 566 | alloca (0); |
| 567 | } |
| 568 | |
| 569 | void |
| 570 | registers_changed (void) |
| 571 | { |
| 572 | registers_changed_ptid (minus_one_ptid); |
| 573 | } |
| 574 | |
| 575 | void |
| 576 | regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
| 577 | { |
| 578 | gdb_assert (regcache != NULL && buf != NULL); |
| 579 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 580 | /* Make certain that the register cache is up-to-date with respect |
| 581 | to the current thread. This switching shouldn't be necessary |
| 582 | only there is still only one target side register cache. Sigh! |
| 583 | On the bright side, at least there is a regcache object. */ |
| 584 | if (!regcache->readonly_p) |
| 585 | { |
| 586 | if (!regcache_valid_p (regcache, regnum)) |
| 587 | { |
| 588 | struct cleanup *old_chain = save_inferior_ptid (); |
| 589 | |
| 590 | inferior_ptid = regcache->ptid; |
| 591 | target_fetch_registers (regcache, regnum); |
| 592 | do_cleanups (old_chain); |
| 593 | } |
| 594 | #if 0 |
| 595 | /* FIXME: cagney/2004-08-07: At present a number of targets |
| 596 | forget (or didn't know that they needed) to set this leading to |
| 597 | panics. Also is the problem that targets need to indicate |
| 598 | that a register is in one of the possible states: valid, |
| 599 | undefined, unknown. The last of which isn't yet |
| 600 | possible. */ |
| 601 | gdb_assert (regcache_valid_p (regcache, regnum)); |
| 602 | #endif |
| 603 | } |
| 604 | /* Copy the value directly into the register cache. */ |
| 605 | memcpy (buf, register_buffer (regcache, regnum), |
| 606 | regcache->descr->sizeof_register[regnum]); |
| 607 | } |
| 608 | |
| 609 | void |
| 610 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
| 611 | { |
| 612 | gdb_byte *buf; |
| 613 | |
| 614 | gdb_assert (regcache != NULL); |
| 615 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 616 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 617 | regcache_raw_read (regcache, regnum, buf); |
| 618 | (*val) = extract_signed_integer |
| 619 | (buf, regcache->descr->sizeof_register[regnum], |
| 620 | gdbarch_byte_order (regcache->descr->gdbarch)); |
| 621 | } |
| 622 | |
| 623 | void |
| 624 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
| 625 | ULONGEST *val) |
| 626 | { |
| 627 | gdb_byte *buf; |
| 628 | |
| 629 | gdb_assert (regcache != NULL); |
| 630 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 631 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 632 | regcache_raw_read (regcache, regnum, buf); |
| 633 | (*val) = extract_unsigned_integer |
| 634 | (buf, regcache->descr->sizeof_register[regnum], |
| 635 | gdbarch_byte_order (regcache->descr->gdbarch)); |
| 636 | } |
| 637 | |
| 638 | void |
| 639 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) |
| 640 | { |
| 641 | void *buf; |
| 642 | |
| 643 | gdb_assert (regcache != NULL); |
| 644 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 645 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 646 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], |
| 647 | gdbarch_byte_order (regcache->descr->gdbarch), val); |
| 648 | regcache_raw_write (regcache, regnum, buf); |
| 649 | } |
| 650 | |
| 651 | void |
| 652 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, |
| 653 | ULONGEST val) |
| 654 | { |
| 655 | void *buf; |
| 656 | |
| 657 | gdb_assert (regcache != NULL); |
| 658 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 659 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 660 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], |
| 661 | gdbarch_byte_order (regcache->descr->gdbarch), val); |
| 662 | regcache_raw_write (regcache, regnum, buf); |
| 663 | } |
| 664 | |
| 665 | void |
| 666 | regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
| 667 | { |
| 668 | gdb_assert (regnum >= 0); |
| 669 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 670 | if (regnum < regcache->descr->nr_raw_registers) |
| 671 | regcache_raw_read (regcache, regnum, buf); |
| 672 | else if (regcache->readonly_p |
| 673 | && regnum < regcache->descr->nr_cooked_registers |
| 674 | && regcache->register_valid_p[regnum]) |
| 675 | /* Read-only register cache, perhaps the cooked value was cached? */ |
| 676 | memcpy (buf, register_buffer (regcache, regnum), |
| 677 | regcache->descr->sizeof_register[regnum]); |
| 678 | else |
| 679 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
| 680 | regnum, buf); |
| 681 | } |
| 682 | |
| 683 | void |
| 684 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
| 685 | LONGEST *val) |
| 686 | { |
| 687 | gdb_byte *buf; |
| 688 | |
| 689 | gdb_assert (regcache != NULL); |
| 690 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 691 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 692 | regcache_cooked_read (regcache, regnum, buf); |
| 693 | (*val) = extract_signed_integer |
| 694 | (buf, regcache->descr->sizeof_register[regnum], |
| 695 | gdbarch_byte_order (regcache->descr->gdbarch)); |
| 696 | } |
| 697 | |
| 698 | void |
| 699 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
| 700 | ULONGEST *val) |
| 701 | { |
| 702 | gdb_byte *buf; |
| 703 | |
| 704 | gdb_assert (regcache != NULL); |
| 705 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 706 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 707 | regcache_cooked_read (regcache, regnum, buf); |
| 708 | (*val) = extract_unsigned_integer |
| 709 | (buf, regcache->descr->sizeof_register[regnum], |
| 710 | gdbarch_byte_order (regcache->descr->gdbarch)); |
| 711 | } |
| 712 | |
| 713 | void |
| 714 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, |
| 715 | LONGEST val) |
| 716 | { |
| 717 | void *buf; |
| 718 | |
| 719 | gdb_assert (regcache != NULL); |
| 720 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 721 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 722 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], |
| 723 | gdbarch_byte_order (regcache->descr->gdbarch), val); |
| 724 | regcache_cooked_write (regcache, regnum, buf); |
| 725 | } |
| 726 | |
| 727 | void |
| 728 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, |
| 729 | ULONGEST val) |
| 730 | { |
| 731 | void *buf; |
| 732 | |
| 733 | gdb_assert (regcache != NULL); |
| 734 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 735 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 736 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], |
| 737 | gdbarch_byte_order (regcache->descr->gdbarch), val); |
| 738 | regcache_cooked_write (regcache, regnum, buf); |
| 739 | } |
| 740 | |
| 741 | void |
| 742 | regcache_raw_write (struct regcache *regcache, int regnum, |
| 743 | const gdb_byte *buf) |
| 744 | { |
| 745 | struct cleanup *old_chain; |
| 746 | |
| 747 | gdb_assert (regcache != NULL && buf != NULL); |
| 748 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 749 | gdb_assert (!regcache->readonly_p); |
| 750 | |
| 751 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 752 | change the registers array if something writes to this register. */ |
| 753 | if (gdbarch_cannot_store_register (get_regcache_arch (regcache), regnum)) |
| 754 | return; |
| 755 | |
| 756 | /* If we have a valid copy of the register, and new value == old |
| 757 | value, then don't bother doing the actual store. */ |
| 758 | if (regcache_valid_p (regcache, regnum) |
| 759 | && (memcmp (register_buffer (regcache, regnum), buf, |
| 760 | regcache->descr->sizeof_register[regnum]) == 0)) |
| 761 | return; |
| 762 | |
| 763 | old_chain = save_inferior_ptid (); |
| 764 | inferior_ptid = regcache->ptid; |
| 765 | |
| 766 | target_prepare_to_store (regcache); |
| 767 | memcpy (register_buffer (regcache, regnum), buf, |
| 768 | regcache->descr->sizeof_register[regnum]); |
| 769 | regcache->register_valid_p[regnum] = 1; |
| 770 | target_store_registers (regcache, regnum); |
| 771 | |
| 772 | do_cleanups (old_chain); |
| 773 | } |
| 774 | |
| 775 | void |
| 776 | regcache_cooked_write (struct regcache *regcache, int regnum, |
| 777 | const gdb_byte *buf) |
| 778 | { |
| 779 | gdb_assert (regnum >= 0); |
| 780 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 781 | if (regnum < regcache->descr->nr_raw_registers) |
| 782 | regcache_raw_write (regcache, regnum, buf); |
| 783 | else |
| 784 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
| 785 | regnum, buf); |
| 786 | } |
| 787 | |
| 788 | /* Perform a partial register transfer using a read, modify, write |
| 789 | operation. */ |
| 790 | |
| 791 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, |
| 792 | void *buf); |
| 793 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, |
| 794 | const void *buf); |
| 795 | |
| 796 | static void |
| 797 | regcache_xfer_part (struct regcache *regcache, int regnum, |
| 798 | int offset, int len, void *in, const void *out, |
| 799 | void (*read) (struct regcache *regcache, int regnum, |
| 800 | gdb_byte *buf), |
| 801 | void (*write) (struct regcache *regcache, int regnum, |
| 802 | const gdb_byte *buf)) |
| 803 | { |
| 804 | struct regcache_descr *descr = regcache->descr; |
| 805 | gdb_byte reg[MAX_REGISTER_SIZE]; |
| 806 | |
| 807 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
| 808 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); |
| 809 | /* Something to do? */ |
| 810 | if (offset + len == 0) |
| 811 | return; |
| 812 | /* Read (when needed) ... */ |
| 813 | if (in != NULL |
| 814 | || offset > 0 |
| 815 | || offset + len < descr->sizeof_register[regnum]) |
| 816 | { |
| 817 | gdb_assert (read != NULL); |
| 818 | read (regcache, regnum, reg); |
| 819 | } |
| 820 | /* ... modify ... */ |
| 821 | if (in != NULL) |
| 822 | memcpy (in, reg + offset, len); |
| 823 | if (out != NULL) |
| 824 | memcpy (reg + offset, out, len); |
| 825 | /* ... write (when needed). */ |
| 826 | if (out != NULL) |
| 827 | { |
| 828 | gdb_assert (write != NULL); |
| 829 | write (regcache, regnum, reg); |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | void |
| 834 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
| 835 | int offset, int len, gdb_byte *buf) |
| 836 | { |
| 837 | struct regcache_descr *descr = regcache->descr; |
| 838 | |
| 839 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 840 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 841 | regcache_raw_read, regcache_raw_write); |
| 842 | } |
| 843 | |
| 844 | void |
| 845 | regcache_raw_write_part (struct regcache *regcache, int regnum, |
| 846 | int offset, int len, const gdb_byte *buf) |
| 847 | { |
| 848 | struct regcache_descr *descr = regcache->descr; |
| 849 | |
| 850 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 851 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 852 | regcache_raw_read, regcache_raw_write); |
| 853 | } |
| 854 | |
| 855 | void |
| 856 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
| 857 | int offset, int len, gdb_byte *buf) |
| 858 | { |
| 859 | struct regcache_descr *descr = regcache->descr; |
| 860 | |
| 861 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 862 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 863 | regcache_cooked_read, regcache_cooked_write); |
| 864 | } |
| 865 | |
| 866 | void |
| 867 | regcache_cooked_write_part (struct regcache *regcache, int regnum, |
| 868 | int offset, int len, const gdb_byte *buf) |
| 869 | { |
| 870 | struct regcache_descr *descr = regcache->descr; |
| 871 | |
| 872 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 873 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 874 | regcache_cooked_read, regcache_cooked_write); |
| 875 | } |
| 876 | |
| 877 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
| 878 | |
| 879 | void |
| 880 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
| 881 | { |
| 882 | void *regbuf; |
| 883 | size_t size; |
| 884 | |
| 885 | gdb_assert (regcache != NULL); |
| 886 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 887 | gdb_assert (!regcache->readonly_p); |
| 888 | |
| 889 | regbuf = register_buffer (regcache, regnum); |
| 890 | size = regcache->descr->sizeof_register[regnum]; |
| 891 | |
| 892 | if (buf) |
| 893 | memcpy (regbuf, buf, size); |
| 894 | else |
| 895 | memset (regbuf, 0, size); |
| 896 | |
| 897 | /* Mark the register as cached. */ |
| 898 | regcache->register_valid_p[regnum] = 1; |
| 899 | } |
| 900 | |
| 901 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
| 902 | |
| 903 | void |
| 904 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
| 905 | { |
| 906 | const void *regbuf; |
| 907 | size_t size; |
| 908 | |
| 909 | gdb_assert (regcache != NULL && buf != NULL); |
| 910 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 911 | |
| 912 | regbuf = register_buffer (regcache, regnum); |
| 913 | size = regcache->descr->sizeof_register[regnum]; |
| 914 | memcpy (buf, regbuf, size); |
| 915 | } |
| 916 | |
| 917 | |
| 918 | /* Special handling for register PC. */ |
| 919 | |
| 920 | CORE_ADDR |
| 921 | regcache_read_pc (struct regcache *regcache) |
| 922 | { |
| 923 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 924 | |
| 925 | CORE_ADDR pc_val; |
| 926 | |
| 927 | if (gdbarch_read_pc_p (gdbarch)) |
| 928 | pc_val = gdbarch_read_pc (gdbarch, regcache); |
| 929 | /* Else use per-frame method on get_current_frame. */ |
| 930 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
| 931 | { |
| 932 | ULONGEST raw_val; |
| 933 | |
| 934 | regcache_cooked_read_unsigned (regcache, |
| 935 | gdbarch_pc_regnum (gdbarch), |
| 936 | &raw_val); |
| 937 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
| 938 | } |
| 939 | else |
| 940 | internal_error (__FILE__, __LINE__, |
| 941 | _("regcache_read_pc: Unable to find PC")); |
| 942 | return pc_val; |
| 943 | } |
| 944 | |
| 945 | void |
| 946 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
| 947 | { |
| 948 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 949 | |
| 950 | if (gdbarch_write_pc_p (gdbarch)) |
| 951 | gdbarch_write_pc (gdbarch, regcache, pc); |
| 952 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
| 953 | regcache_cooked_write_unsigned (regcache, |
| 954 | gdbarch_pc_regnum (gdbarch), pc); |
| 955 | else |
| 956 | internal_error (__FILE__, __LINE__, |
| 957 | _("regcache_write_pc: Unable to update PC")); |
| 958 | |
| 959 | /* Writing the PC (for instance, from "load") invalidates the |
| 960 | current frame. */ |
| 961 | reinit_frame_cache (); |
| 962 | } |
| 963 | |
| 964 | |
| 965 | static void |
| 966 | reg_flush_command (char *command, int from_tty) |
| 967 | { |
| 968 | /* Force-flush the register cache. */ |
| 969 | registers_changed (); |
| 970 | if (from_tty) |
| 971 | printf_filtered (_("Register cache flushed.\n")); |
| 972 | } |
| 973 | |
| 974 | static void |
| 975 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, |
| 976 | const unsigned char *buf, long len) |
| 977 | { |
| 978 | int i; |
| 979 | |
| 980 | switch (endian) |
| 981 | { |
| 982 | case BFD_ENDIAN_BIG: |
| 983 | for (i = 0; i < len; i++) |
| 984 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 985 | break; |
| 986 | case BFD_ENDIAN_LITTLE: |
| 987 | for (i = len - 1; i >= 0; i--) |
| 988 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 989 | break; |
| 990 | default: |
| 991 | internal_error (__FILE__, __LINE__, _("Bad switch")); |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | enum regcache_dump_what |
| 996 | { |
| 997 | regcache_dump_none, regcache_dump_raw, |
| 998 | regcache_dump_cooked, regcache_dump_groups |
| 999 | }; |
| 1000 | |
| 1001 | static void |
| 1002 | regcache_dump (struct regcache *regcache, struct ui_file *file, |
| 1003 | enum regcache_dump_what what_to_dump) |
| 1004 | { |
| 1005 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 1006 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
| 1007 | int regnum; |
| 1008 | int footnote_nr = 0; |
| 1009 | int footnote_register_size = 0; |
| 1010 | int footnote_register_offset = 0; |
| 1011 | int footnote_register_type_name_null = 0; |
| 1012 | long register_offset = 0; |
| 1013 | unsigned char buf[MAX_REGISTER_SIZE]; |
| 1014 | |
| 1015 | #if 0 |
| 1016 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
| 1017 | regcache->descr->nr_raw_registers); |
| 1018 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", |
| 1019 | regcache->descr->nr_cooked_registers); |
| 1020 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", |
| 1021 | regcache->descr->sizeof_raw_registers); |
| 1022 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", |
| 1023 | regcache->descr->sizeof_raw_register_valid_p); |
| 1024 | fprintf_unfiltered (file, "gdbarch_num_regs %d\n", |
| 1025 | gdbarch_num_regs (gdbarch)); |
| 1026 | fprintf_unfiltered (file, "gdbarch_num_pseudo_regs %d\n", |
| 1027 | gdbarch_num_pseudo_regs (gdbarch)); |
| 1028 | #endif |
| 1029 | |
| 1030 | gdb_assert (regcache->descr->nr_cooked_registers |
| 1031 | == (gdbarch_num_regs (gdbarch) |
| 1032 | + gdbarch_num_pseudo_regs (gdbarch))); |
| 1033 | |
| 1034 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) |
| 1035 | { |
| 1036 | /* Name. */ |
| 1037 | if (regnum < 0) |
| 1038 | fprintf_unfiltered (file, " %-10s", "Name"); |
| 1039 | else |
| 1040 | { |
| 1041 | const char *p = gdbarch_register_name (gdbarch, regnum); |
| 1042 | |
| 1043 | if (p == NULL) |
| 1044 | p = ""; |
| 1045 | else if (p[0] == '\0') |
| 1046 | p = "''"; |
| 1047 | fprintf_unfiltered (file, " %-10s", p); |
| 1048 | } |
| 1049 | |
| 1050 | /* Number. */ |
| 1051 | if (regnum < 0) |
| 1052 | fprintf_unfiltered (file, " %4s", "Nr"); |
| 1053 | else |
| 1054 | fprintf_unfiltered (file, " %4d", regnum); |
| 1055 | |
| 1056 | /* Relative number. */ |
| 1057 | if (regnum < 0) |
| 1058 | fprintf_unfiltered (file, " %4s", "Rel"); |
| 1059 | else if (regnum < gdbarch_num_regs (gdbarch)) |
| 1060 | fprintf_unfiltered (file, " %4d", regnum); |
| 1061 | else |
| 1062 | fprintf_unfiltered (file, " %4d", |
| 1063 | (regnum - gdbarch_num_regs (gdbarch))); |
| 1064 | |
| 1065 | /* Offset. */ |
| 1066 | if (regnum < 0) |
| 1067 | fprintf_unfiltered (file, " %6s ", "Offset"); |
| 1068 | else |
| 1069 | { |
| 1070 | fprintf_unfiltered (file, " %6ld", |
| 1071 | regcache->descr->register_offset[regnum]); |
| 1072 | if (register_offset != regcache->descr->register_offset[regnum] |
| 1073 | || (regnum > 0 |
| 1074 | && (regcache->descr->register_offset[regnum] |
| 1075 | != (regcache->descr->register_offset[regnum - 1] |
| 1076 | + regcache->descr->sizeof_register[regnum - 1]))) |
| 1077 | ) |
| 1078 | { |
| 1079 | if (!footnote_register_offset) |
| 1080 | footnote_register_offset = ++footnote_nr; |
| 1081 | fprintf_unfiltered (file, "*%d", footnote_register_offset); |
| 1082 | } |
| 1083 | else |
| 1084 | fprintf_unfiltered (file, " "); |
| 1085 | register_offset = (regcache->descr->register_offset[regnum] |
| 1086 | + regcache->descr->sizeof_register[regnum]); |
| 1087 | } |
| 1088 | |
| 1089 | /* Size. */ |
| 1090 | if (regnum < 0) |
| 1091 | fprintf_unfiltered (file, " %5s ", "Size"); |
| 1092 | else |
| 1093 | fprintf_unfiltered (file, " %5ld", |
| 1094 | regcache->descr->sizeof_register[regnum]); |
| 1095 | |
| 1096 | /* Type. */ |
| 1097 | { |
| 1098 | const char *t; |
| 1099 | |
| 1100 | if (regnum < 0) |
| 1101 | t = "Type"; |
| 1102 | else |
| 1103 | { |
| 1104 | static const char blt[] = "builtin_type"; |
| 1105 | |
| 1106 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); |
| 1107 | if (t == NULL) |
| 1108 | { |
| 1109 | char *n; |
| 1110 | |
| 1111 | if (!footnote_register_type_name_null) |
| 1112 | footnote_register_type_name_null = ++footnote_nr; |
| 1113 | n = xstrprintf ("*%d", footnote_register_type_name_null); |
| 1114 | make_cleanup (xfree, n); |
| 1115 | t = n; |
| 1116 | } |
| 1117 | /* Chop a leading builtin_type. */ |
| 1118 | if (strncmp (t, blt, strlen (blt)) == 0) |
| 1119 | t += strlen (blt); |
| 1120 | } |
| 1121 | fprintf_unfiltered (file, " %-15s", t); |
| 1122 | } |
| 1123 | |
| 1124 | /* Leading space always present. */ |
| 1125 | fprintf_unfiltered (file, " "); |
| 1126 | |
| 1127 | /* Value, raw. */ |
| 1128 | if (what_to_dump == regcache_dump_raw) |
| 1129 | { |
| 1130 | if (regnum < 0) |
| 1131 | fprintf_unfiltered (file, "Raw value"); |
| 1132 | else if (regnum >= regcache->descr->nr_raw_registers) |
| 1133 | fprintf_unfiltered (file, "<cooked>"); |
| 1134 | else if (!regcache_valid_p (regcache, regnum)) |
| 1135 | fprintf_unfiltered (file, "<invalid>"); |
| 1136 | else |
| 1137 | { |
| 1138 | regcache_raw_read (regcache, regnum, buf); |
| 1139 | fprintf_unfiltered (file, "0x"); |
| 1140 | dump_endian_bytes (file, |
| 1141 | gdbarch_byte_order (gdbarch), buf, |
| 1142 | regcache->descr->sizeof_register[regnum]); |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | /* Value, cooked. */ |
| 1147 | if (what_to_dump == regcache_dump_cooked) |
| 1148 | { |
| 1149 | if (regnum < 0) |
| 1150 | fprintf_unfiltered (file, "Cooked value"); |
| 1151 | else |
| 1152 | { |
| 1153 | regcache_cooked_read (regcache, regnum, buf); |
| 1154 | fprintf_unfiltered (file, "0x"); |
| 1155 | dump_endian_bytes (file, |
| 1156 | gdbarch_byte_order (gdbarch), buf, |
| 1157 | regcache->descr->sizeof_register[regnum]); |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | /* Group members. */ |
| 1162 | if (what_to_dump == regcache_dump_groups) |
| 1163 | { |
| 1164 | if (regnum < 0) |
| 1165 | fprintf_unfiltered (file, "Groups"); |
| 1166 | else |
| 1167 | { |
| 1168 | const char *sep = ""; |
| 1169 | struct reggroup *group; |
| 1170 | |
| 1171 | for (group = reggroup_next (gdbarch, NULL); |
| 1172 | group != NULL; |
| 1173 | group = reggroup_next (gdbarch, group)) |
| 1174 | { |
| 1175 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 1176 | { |
| 1177 | fprintf_unfiltered (file, |
| 1178 | "%s%s", sep, reggroup_name (group)); |
| 1179 | sep = ","; |
| 1180 | } |
| 1181 | } |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | fprintf_unfiltered (file, "\n"); |
| 1186 | } |
| 1187 | |
| 1188 | if (footnote_register_size) |
| 1189 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", |
| 1190 | footnote_register_size); |
| 1191 | if (footnote_register_offset) |
| 1192 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", |
| 1193 | footnote_register_offset); |
| 1194 | if (footnote_register_type_name_null) |
| 1195 | fprintf_unfiltered (file, |
| 1196 | "*%d: Register type's name NULL.\n", |
| 1197 | footnote_register_type_name_null); |
| 1198 | do_cleanups (cleanups); |
| 1199 | } |
| 1200 | |
| 1201 | static void |
| 1202 | regcache_print (char *args, enum regcache_dump_what what_to_dump) |
| 1203 | { |
| 1204 | if (args == NULL) |
| 1205 | regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump); |
| 1206 | else |
| 1207 | { |
| 1208 | struct cleanup *cleanups; |
| 1209 | struct ui_file *file = gdb_fopen (args, "w"); |
| 1210 | |
| 1211 | if (file == NULL) |
| 1212 | perror_with_name (_("maintenance print architecture")); |
| 1213 | cleanups = make_cleanup_ui_file_delete (file); |
| 1214 | regcache_dump (get_current_regcache (), file, what_to_dump); |
| 1215 | do_cleanups (cleanups); |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | static void |
| 1220 | maintenance_print_registers (char *args, int from_tty) |
| 1221 | { |
| 1222 | regcache_print (args, regcache_dump_none); |
| 1223 | } |
| 1224 | |
| 1225 | static void |
| 1226 | maintenance_print_raw_registers (char *args, int from_tty) |
| 1227 | { |
| 1228 | regcache_print (args, regcache_dump_raw); |
| 1229 | } |
| 1230 | |
| 1231 | static void |
| 1232 | maintenance_print_cooked_registers (char *args, int from_tty) |
| 1233 | { |
| 1234 | regcache_print (args, regcache_dump_cooked); |
| 1235 | } |
| 1236 | |
| 1237 | static void |
| 1238 | maintenance_print_register_groups (char *args, int from_tty) |
| 1239 | { |
| 1240 | regcache_print (args, regcache_dump_groups); |
| 1241 | } |
| 1242 | |
| 1243 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
| 1244 | |
| 1245 | void |
| 1246 | _initialize_regcache (void) |
| 1247 | { |
| 1248 | regcache_descr_handle |
| 1249 | = gdbarch_data_register_post_init (init_regcache_descr); |
| 1250 | |
| 1251 | observer_attach_target_changed (regcache_observer_target_changed); |
| 1252 | observer_attach_thread_ptid_changed (regcache_thread_ptid_changed); |
| 1253 | |
| 1254 | add_com ("flushregs", class_maintenance, reg_flush_command, |
| 1255 | _("Force gdb to flush its register cache (maintainer command)")); |
| 1256 | |
| 1257 | add_cmd ("registers", class_maintenance, maintenance_print_registers, |
| 1258 | _("Print the internal register configuration.\n" |
| 1259 | "Takes an optional file parameter."), &maintenanceprintlist); |
| 1260 | add_cmd ("raw-registers", class_maintenance, |
| 1261 | maintenance_print_raw_registers, |
| 1262 | _("Print the internal register configuration " |
| 1263 | "including raw values.\n" |
| 1264 | "Takes an optional file parameter."), &maintenanceprintlist); |
| 1265 | add_cmd ("cooked-registers", class_maintenance, |
| 1266 | maintenance_print_cooked_registers, |
| 1267 | _("Print the internal register configuration " |
| 1268 | "including cooked values.\n" |
| 1269 | "Takes an optional file parameter."), &maintenanceprintlist); |
| 1270 | add_cmd ("register-groups", class_maintenance, |
| 1271 | maintenance_print_register_groups, |
| 1272 | _("Print the internal register configuration " |
| 1273 | "including each register's group.\n" |
| 1274 | "Takes an optional file parameter."), |
| 1275 | &maintenanceprintlist); |
| 1276 | |
| 1277 | } |