| 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 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 2 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, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "inferior.h" |
| 25 | #include "target.h" |
| 26 | #include "gdbarch.h" |
| 27 | #include "gdbcmd.h" |
| 28 | #include "regcache.h" |
| 29 | #include "reggroups.h" |
| 30 | #include "gdb_assert.h" |
| 31 | #include "gdb_string.h" |
| 32 | #include "gdbcmd.h" /* For maintenanceprintlist. */ |
| 33 | #include "observer.h" |
| 34 | |
| 35 | /* |
| 36 | * DATA STRUCTURE |
| 37 | * |
| 38 | * Here is the actual register cache. |
| 39 | */ |
| 40 | |
| 41 | /* Per-architecture object describing the layout of a register cache. |
| 42 | Computed once when the architecture is created */ |
| 43 | |
| 44 | struct gdbarch_data *regcache_descr_handle; |
| 45 | |
| 46 | struct regcache_descr |
| 47 | { |
| 48 | /* The architecture this descriptor belongs to. */ |
| 49 | struct gdbarch *gdbarch; |
| 50 | |
| 51 | /* The raw register cache. Each raw (or hard) register is supplied |
| 52 | by the target interface. The raw cache should not contain |
| 53 | redundant information - if the PC is constructed from two |
| 54 | registers then those registers and not the PC lives in the raw |
| 55 | cache. */ |
| 56 | int nr_raw_registers; |
| 57 | long sizeof_raw_registers; |
| 58 | long sizeof_raw_register_valid_p; |
| 59 | |
| 60 | /* The cooked register space. Each cooked register in the range |
| 61 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw |
| 62 | register. The remaining [NR_RAW_REGISTERS |
| 63 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
| 64 | both raw registers and memory by the architecture methods |
| 65 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
| 66 | int nr_cooked_registers; |
| 67 | long sizeof_cooked_registers; |
| 68 | long sizeof_cooked_register_valid_p; |
| 69 | |
| 70 | /* Offset and size (in 8 bit bytes), of reach register in the |
| 71 | register cache. All registers (including those in the range |
| 72 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. |
| 73 | Assigning all registers an offset makes it possible to keep |
| 74 | legacy code, such as that found in read_register_bytes() and |
| 75 | write_register_bytes() working. */ |
| 76 | long *register_offset; |
| 77 | long *sizeof_register; |
| 78 | |
| 79 | /* Cached table containing the type of each register. */ |
| 80 | struct type **register_type; |
| 81 | }; |
| 82 | |
| 83 | static void * |
| 84 | init_regcache_descr (struct gdbarch *gdbarch) |
| 85 | { |
| 86 | int i; |
| 87 | struct regcache_descr *descr; |
| 88 | gdb_assert (gdbarch != NULL); |
| 89 | |
| 90 | /* Create an initial, zero filled, table. */ |
| 91 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
| 92 | descr->gdbarch = gdbarch; |
| 93 | |
| 94 | /* Total size of the register space. The raw registers are mapped |
| 95 | directly onto the raw register cache while the pseudo's are |
| 96 | either mapped onto raw-registers or memory. */ |
| 97 | descr->nr_cooked_registers = gdbarch_num_regs (current_gdbarch) |
| 98 | + gdbarch_num_pseudo_regs (current_gdbarch); |
| 99 | descr->sizeof_cooked_register_valid_p = gdbarch_num_regs (current_gdbarch) |
| 100 | + gdbarch_num_pseudo_regs |
| 101 | (current_gdbarch); |
| 102 | |
| 103 | /* Fill in a table of register types. */ |
| 104 | descr->register_type |
| 105 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *); |
| 106 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 107 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
| 108 | |
| 109 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
| 110 | into the register cache. */ |
| 111 | descr->nr_raw_registers = gdbarch_num_regs (current_gdbarch); |
| 112 | |
| 113 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p |
| 114 | array. This pretects GDB from erant code that accesses elements |
| 115 | of the global register_valid_p[] array in the range |
| 116 | [gdbarch_num_regs .. gdbarch_num_regs + gdbarch_num_pseudo_regs). */ |
| 117 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
| 118 | |
| 119 | /* Lay out the register cache. |
| 120 | |
| 121 | NOTE: cagney/2002-05-22: Only register_type() is used when |
| 122 | constructing the register cache. It is assumed that the |
| 123 | register's raw size, virtual size and type length are all the |
| 124 | same. */ |
| 125 | |
| 126 | { |
| 127 | long offset = 0; |
| 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 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 167 | return descr->register_type[regnum]; |
| 168 | } |
| 169 | |
| 170 | /* Utility functions returning useful register attributes stored in |
| 171 | the regcache descr. */ |
| 172 | |
| 173 | int |
| 174 | register_size (struct gdbarch *gdbarch, int regnum) |
| 175 | { |
| 176 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 177 | int size; |
| 178 | gdb_assert (regnum >= 0 |
| 179 | && regnum < (gdbarch_num_regs (current_gdbarch) |
| 180 | + gdbarch_num_pseudo_regs (current_gdbarch))); |
| 181 | size = descr->sizeof_register[regnum]; |
| 182 | return size; |
| 183 | } |
| 184 | |
| 185 | /* The register cache for storing raw register values. */ |
| 186 | |
| 187 | struct regcache |
| 188 | { |
| 189 | struct regcache_descr *descr; |
| 190 | /* The register buffers. A read-only register cache can hold the |
| 191 | full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write |
| 192 | register cache can only hold [0 .. gdbarch_num_regs). */ |
| 193 | gdb_byte *registers; |
| 194 | /* Register cache status: |
| 195 | register_valid_p[REG] == 0 if REG value is not in the cache |
| 196 | > 0 if REG value is in the cache |
| 197 | < 0 if REG value is permanently unavailable */ |
| 198 | signed char *register_valid_p; |
| 199 | /* Is this a read-only cache? A read-only cache is used for saving |
| 200 | the target's register state (e.g, across an inferior function |
| 201 | call or just before forcing a function return). A read-only |
| 202 | cache can only be updated via the methods regcache_dup() and |
| 203 | regcache_cpy(). The actual contents are determined by the |
| 204 | reggroup_save and reggroup_restore methods. */ |
| 205 | int readonly_p; |
| 206 | /* If this is a read-write cache, which thread's registers is |
| 207 | it connected to? */ |
| 208 | ptid_t ptid; |
| 209 | }; |
| 210 | |
| 211 | struct regcache * |
| 212 | regcache_xmalloc (struct gdbarch *gdbarch) |
| 213 | { |
| 214 | struct regcache_descr *descr; |
| 215 | struct regcache *regcache; |
| 216 | gdb_assert (gdbarch != NULL); |
| 217 | descr = regcache_descr (gdbarch); |
| 218 | regcache = XMALLOC (struct regcache); |
| 219 | regcache->descr = descr; |
| 220 | regcache->registers |
| 221 | = XCALLOC (descr->sizeof_raw_registers, gdb_byte); |
| 222 | regcache->register_valid_p |
| 223 | = XCALLOC (descr->sizeof_raw_register_valid_p, gdb_byte); |
| 224 | regcache->readonly_p = 1; |
| 225 | regcache->ptid = minus_one_ptid; |
| 226 | return regcache; |
| 227 | } |
| 228 | |
| 229 | void |
| 230 | regcache_xfree (struct regcache *regcache) |
| 231 | { |
| 232 | if (regcache == NULL) |
| 233 | return; |
| 234 | xfree (regcache->registers); |
| 235 | xfree (regcache->register_valid_p); |
| 236 | xfree (regcache); |
| 237 | } |
| 238 | |
| 239 | static void |
| 240 | do_regcache_xfree (void *data) |
| 241 | { |
| 242 | regcache_xfree (data); |
| 243 | } |
| 244 | |
| 245 | struct cleanup * |
| 246 | make_cleanup_regcache_xfree (struct regcache *regcache) |
| 247 | { |
| 248 | return make_cleanup (do_regcache_xfree, regcache); |
| 249 | } |
| 250 | |
| 251 | /* Return REGCACHE's architecture. */ |
| 252 | |
| 253 | struct gdbarch * |
| 254 | get_regcache_arch (const struct regcache *regcache) |
| 255 | { |
| 256 | return regcache->descr->gdbarch; |
| 257 | } |
| 258 | |
| 259 | /* Return a pointer to register REGNUM's buffer cache. */ |
| 260 | |
| 261 | static gdb_byte * |
| 262 | register_buffer (const struct regcache *regcache, int regnum) |
| 263 | { |
| 264 | return regcache->registers + regcache->descr->register_offset[regnum]; |
| 265 | } |
| 266 | |
| 267 | void |
| 268 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
| 269 | void *src) |
| 270 | { |
| 271 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 272 | gdb_byte buf[MAX_REGISTER_SIZE]; |
| 273 | int regnum; |
| 274 | /* The DST should be `read-only', if it wasn't then the save would |
| 275 | end up trying to write the register values back out to the |
| 276 | target. */ |
| 277 | gdb_assert (dst->readonly_p); |
| 278 | /* Clear the dest. */ |
| 279 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); |
| 280 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); |
| 281 | /* Copy over any registers (identified by their membership in the |
| 282 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
| 283 | gdbarch_num_pseudo_regs) range is checked since some architectures need |
| 284 | to save/restore `cooked' registers that live in memory. */ |
| 285 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 286 | { |
| 287 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) |
| 288 | { |
| 289 | int valid = cooked_read (src, regnum, buf); |
| 290 | if (valid) |
| 291 | { |
| 292 | memcpy (register_buffer (dst, regnum), buf, |
| 293 | register_size (gdbarch, regnum)); |
| 294 | dst->register_valid_p[regnum] = 1; |
| 295 | } |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | void |
| 301 | regcache_restore (struct regcache *dst, |
| 302 | regcache_cooked_read_ftype *cooked_read, |
| 303 | void *cooked_read_context) |
| 304 | { |
| 305 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 306 | gdb_byte buf[MAX_REGISTER_SIZE]; |
| 307 | int regnum; |
| 308 | /* The dst had better not be read-only. If it is, the `restore' |
| 309 | doesn't make much sense. */ |
| 310 | gdb_assert (!dst->readonly_p); |
| 311 | /* Copy over any registers, being careful to only restore those that |
| 312 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
| 313 | + gdbarch_num_pseudo_regs) range is checked since some architectures need |
| 314 | to save/restore `cooked' registers that live in memory. */ |
| 315 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 316 | { |
| 317 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
| 318 | { |
| 319 | int valid = cooked_read (cooked_read_context, regnum, buf); |
| 320 | if (valid) |
| 321 | regcache_cooked_write (dst, regnum, buf); |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | static int |
| 327 | do_cooked_read (void *src, int regnum, gdb_byte *buf) |
| 328 | { |
| 329 | struct regcache *regcache = src; |
| 330 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
| 331 | /* Don't even think about fetching a register from a read-only |
| 332 | cache when the register isn't yet valid. There isn't a target |
| 333 | from which the register value can be fetched. */ |
| 334 | return 0; |
| 335 | regcache_cooked_read (regcache, regnum, buf); |
| 336 | return 1; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | void |
| 341 | regcache_cpy (struct regcache *dst, struct regcache *src) |
| 342 | { |
| 343 | int i; |
| 344 | gdb_byte *buf; |
| 345 | gdb_assert (src != NULL && dst != NULL); |
| 346 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 347 | gdb_assert (src != dst); |
| 348 | gdb_assert (src->readonly_p || dst->readonly_p); |
| 349 | if (!src->readonly_p) |
| 350 | regcache_save (dst, do_cooked_read, src); |
| 351 | else if (!dst->readonly_p) |
| 352 | regcache_restore (dst, do_cooked_read, src); |
| 353 | else |
| 354 | regcache_cpy_no_passthrough (dst, src); |
| 355 | } |
| 356 | |
| 357 | void |
| 358 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) |
| 359 | { |
| 360 | int i; |
| 361 | gdb_assert (src != NULL && dst != NULL); |
| 362 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 363 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough |
| 364 | move of data into the current regcache. Doing this would be |
| 365 | silly - it would mean that valid_p would be completely invalid. */ |
| 366 | gdb_assert (dst->readonly_p); |
| 367 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
| 368 | memcpy (dst->register_valid_p, src->register_valid_p, |
| 369 | dst->descr->sizeof_raw_register_valid_p); |
| 370 | } |
| 371 | |
| 372 | struct regcache * |
| 373 | regcache_dup (struct regcache *src) |
| 374 | { |
| 375 | struct regcache *newbuf; |
| 376 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 377 | regcache_cpy (newbuf, src); |
| 378 | return newbuf; |
| 379 | } |
| 380 | |
| 381 | struct regcache * |
| 382 | regcache_dup_no_passthrough (struct regcache *src) |
| 383 | { |
| 384 | struct regcache *newbuf; |
| 385 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 386 | regcache_cpy_no_passthrough (newbuf, src); |
| 387 | return newbuf; |
| 388 | } |
| 389 | |
| 390 | int |
| 391 | regcache_valid_p (const struct regcache *regcache, int regnum) |
| 392 | { |
| 393 | gdb_assert (regcache != NULL); |
| 394 | gdb_assert (regnum >= 0); |
| 395 | if (regcache->readonly_p) |
| 396 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 397 | else |
| 398 | gdb_assert (regnum < regcache->descr->nr_raw_registers); |
| 399 | |
| 400 | return regcache->register_valid_p[regnum]; |
| 401 | } |
| 402 | |
| 403 | void |
| 404 | regcache_invalidate (struct regcache *regcache, int regnum) |
| 405 | { |
| 406 | gdb_assert (regcache != NULL); |
| 407 | gdb_assert (regnum >= 0); |
| 408 | gdb_assert (!regcache->readonly_p); |
| 409 | gdb_assert (regnum < regcache->descr->nr_raw_registers); |
| 410 | regcache->register_valid_p[regnum] = 0; |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* Global structure containing the current regcache. */ |
| 415 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and |
| 416 | deprecated_register_valid[] currently point into this structure. */ |
| 417 | static struct regcache *current_regcache; |
| 418 | |
| 419 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
| 420 | recording if the register values have been changed (eg. by the |
| 421 | user). Therefore all registers must be written back to the |
| 422 | target when appropriate. */ |
| 423 | |
| 424 | struct regcache *get_thread_regcache (ptid_t ptid) |
| 425 | { |
| 426 | /* NOTE: uweigand/2007-05-05: We need to detect the thread's |
| 427 | current architecture at this point. */ |
| 428 | struct gdbarch *thread_gdbarch = current_gdbarch; |
| 429 | |
| 430 | if (current_regcache && ptid_equal (current_regcache->ptid, ptid) |
| 431 | && get_regcache_arch (current_regcache) == thread_gdbarch) |
| 432 | return current_regcache; |
| 433 | |
| 434 | if (current_regcache) |
| 435 | regcache_xfree (current_regcache); |
| 436 | |
| 437 | current_regcache = regcache_xmalloc (thread_gdbarch); |
| 438 | current_regcache->readonly_p = 0; |
| 439 | current_regcache->ptid = ptid; |
| 440 | |
| 441 | return current_regcache; |
| 442 | } |
| 443 | |
| 444 | struct regcache *get_current_regcache (void) |
| 445 | { |
| 446 | return get_thread_regcache (inferior_ptid); |
| 447 | } |
| 448 | |
| 449 | |
| 450 | /* Observer for the target_changed event. */ |
| 451 | |
| 452 | void |
| 453 | regcache_observer_target_changed (struct target_ops *target) |
| 454 | { |
| 455 | registers_changed (); |
| 456 | } |
| 457 | |
| 458 | /* Low level examining and depositing of registers. |
| 459 | |
| 460 | The caller is responsible for making sure that the inferior is |
| 461 | stopped before calling the fetching routines, or it will get |
| 462 | garbage. (a change from GDB version 3, in which the caller got the |
| 463 | value from the last stop). */ |
| 464 | |
| 465 | /* REGISTERS_CHANGED () |
| 466 | |
| 467 | Indicate that registers may have changed, so invalidate the cache. */ |
| 468 | |
| 469 | void |
| 470 | registers_changed (void) |
| 471 | { |
| 472 | int i; |
| 473 | |
| 474 | regcache_xfree (current_regcache); |
| 475 | current_regcache = NULL; |
| 476 | |
| 477 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 478 | a builtin alloca. This particular call is used to clean up |
| 479 | areas allocated by low level target code which may build up |
| 480 | during lengthy interactions between gdb and the target before |
| 481 | gdb gives control to the user (ie watchpoints). */ |
| 482 | alloca (0); |
| 483 | } |
| 484 | |
| 485 | |
| 486 | void |
| 487 | regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
| 488 | { |
| 489 | gdb_assert (regcache != NULL && buf != NULL); |
| 490 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 491 | /* Make certain that the register cache is up-to-date with respect |
| 492 | to the current thread. This switching shouldn't be necessary |
| 493 | only there is still only one target side register cache. Sigh! |
| 494 | On the bright side, at least there is a regcache object. */ |
| 495 | if (!regcache->readonly_p) |
| 496 | { |
| 497 | if (!regcache_valid_p (regcache, regnum)) |
| 498 | { |
| 499 | struct cleanup *old_chain = save_inferior_ptid (); |
| 500 | inferior_ptid = regcache->ptid; |
| 501 | target_fetch_registers (regcache, regnum); |
| 502 | do_cleanups (old_chain); |
| 503 | } |
| 504 | #if 0 |
| 505 | /* FIXME: cagney/2004-08-07: At present a number of targets |
| 506 | forget (or didn't know that they needed) to set this leading to |
| 507 | panics. Also is the problem that targets need to indicate |
| 508 | that a register is in one of the possible states: valid, |
| 509 | undefined, unknown. The last of which isn't yet |
| 510 | possible. */ |
| 511 | gdb_assert (regcache_valid_p (regcache, regnum)); |
| 512 | #endif |
| 513 | } |
| 514 | /* Copy the value directly into the register cache. */ |
| 515 | memcpy (buf, register_buffer (regcache, regnum), |
| 516 | regcache->descr->sizeof_register[regnum]); |
| 517 | } |
| 518 | |
| 519 | void |
| 520 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
| 521 | { |
| 522 | gdb_byte *buf; |
| 523 | gdb_assert (regcache != NULL); |
| 524 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 525 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 526 | regcache_raw_read (regcache, regnum, buf); |
| 527 | (*val) = extract_signed_integer (buf, |
| 528 | regcache->descr->sizeof_register[regnum]); |
| 529 | } |
| 530 | |
| 531 | void |
| 532 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
| 533 | ULONGEST *val) |
| 534 | { |
| 535 | gdb_byte *buf; |
| 536 | gdb_assert (regcache != NULL); |
| 537 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 538 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 539 | regcache_raw_read (regcache, regnum, buf); |
| 540 | (*val) = extract_unsigned_integer (buf, |
| 541 | regcache->descr->sizeof_register[regnum]); |
| 542 | } |
| 543 | |
| 544 | void |
| 545 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) |
| 546 | { |
| 547 | void *buf; |
| 548 | gdb_assert (regcache != NULL); |
| 549 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 550 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 551 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 552 | regcache_raw_write (regcache, regnum, buf); |
| 553 | } |
| 554 | |
| 555 | void |
| 556 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, |
| 557 | ULONGEST val) |
| 558 | { |
| 559 | void *buf; |
| 560 | gdb_assert (regcache != NULL); |
| 561 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 562 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 563 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 564 | regcache_raw_write (regcache, regnum, buf); |
| 565 | } |
| 566 | |
| 567 | void |
| 568 | regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
| 569 | { |
| 570 | gdb_assert (regnum >= 0); |
| 571 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 572 | if (regnum < regcache->descr->nr_raw_registers) |
| 573 | regcache_raw_read (regcache, regnum, buf); |
| 574 | else if (regcache->readonly_p |
| 575 | && regnum < regcache->descr->nr_cooked_registers |
| 576 | && regcache->register_valid_p[regnum]) |
| 577 | /* Read-only register cache, perhaps the cooked value was cached? */ |
| 578 | memcpy (buf, register_buffer (regcache, regnum), |
| 579 | regcache->descr->sizeof_register[regnum]); |
| 580 | else |
| 581 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
| 582 | regnum, buf); |
| 583 | } |
| 584 | |
| 585 | void |
| 586 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
| 587 | LONGEST *val) |
| 588 | { |
| 589 | gdb_byte *buf; |
| 590 | gdb_assert (regcache != NULL); |
| 591 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 592 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 593 | regcache_cooked_read (regcache, regnum, buf); |
| 594 | (*val) = extract_signed_integer (buf, |
| 595 | regcache->descr->sizeof_register[regnum]); |
| 596 | } |
| 597 | |
| 598 | void |
| 599 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
| 600 | ULONGEST *val) |
| 601 | { |
| 602 | gdb_byte *buf; |
| 603 | gdb_assert (regcache != NULL); |
| 604 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 605 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 606 | regcache_cooked_read (regcache, regnum, buf); |
| 607 | (*val) = extract_unsigned_integer (buf, |
| 608 | regcache->descr->sizeof_register[regnum]); |
| 609 | } |
| 610 | |
| 611 | void |
| 612 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, |
| 613 | LONGEST val) |
| 614 | { |
| 615 | void *buf; |
| 616 | gdb_assert (regcache != NULL); |
| 617 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 618 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 619 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 620 | regcache_cooked_write (regcache, regnum, buf); |
| 621 | } |
| 622 | |
| 623 | void |
| 624 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, |
| 625 | ULONGEST val) |
| 626 | { |
| 627 | void *buf; |
| 628 | gdb_assert (regcache != NULL); |
| 629 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 630 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 631 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 632 | regcache_cooked_write (regcache, regnum, buf); |
| 633 | } |
| 634 | |
| 635 | void |
| 636 | regcache_raw_write (struct regcache *regcache, int regnum, |
| 637 | const gdb_byte *buf) |
| 638 | { |
| 639 | struct cleanup *old_chain; |
| 640 | |
| 641 | gdb_assert (regcache != NULL && buf != NULL); |
| 642 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 643 | gdb_assert (!regcache->readonly_p); |
| 644 | |
| 645 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 646 | change the registers array if something writes to this register. */ |
| 647 | if (gdbarch_cannot_store_register (current_gdbarch, regnum)) |
| 648 | return; |
| 649 | |
| 650 | /* If we have a valid copy of the register, and new value == old |
| 651 | value, then don't bother doing the actual store. */ |
| 652 | if (regcache_valid_p (regcache, regnum) |
| 653 | && (memcmp (register_buffer (regcache, regnum), buf, |
| 654 | regcache->descr->sizeof_register[regnum]) == 0)) |
| 655 | return; |
| 656 | |
| 657 | old_chain = save_inferior_ptid (); |
| 658 | inferior_ptid = regcache->ptid; |
| 659 | |
| 660 | target_prepare_to_store (regcache); |
| 661 | memcpy (register_buffer (regcache, regnum), buf, |
| 662 | regcache->descr->sizeof_register[regnum]); |
| 663 | regcache->register_valid_p[regnum] = 1; |
| 664 | target_store_registers (regcache, regnum); |
| 665 | |
| 666 | do_cleanups (old_chain); |
| 667 | } |
| 668 | |
| 669 | void |
| 670 | regcache_cooked_write (struct regcache *regcache, int regnum, |
| 671 | const gdb_byte *buf) |
| 672 | { |
| 673 | gdb_assert (regnum >= 0); |
| 674 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 675 | if (regnum < regcache->descr->nr_raw_registers) |
| 676 | regcache_raw_write (regcache, regnum, buf); |
| 677 | else |
| 678 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
| 679 | regnum, buf); |
| 680 | } |
| 681 | |
| 682 | /* Perform a partial register transfer using a read, modify, write |
| 683 | operation. */ |
| 684 | |
| 685 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, |
| 686 | void *buf); |
| 687 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, |
| 688 | const void *buf); |
| 689 | |
| 690 | static void |
| 691 | regcache_xfer_part (struct regcache *regcache, int regnum, |
| 692 | int offset, int len, void *in, const void *out, |
| 693 | void (*read) (struct regcache *regcache, int regnum, |
| 694 | gdb_byte *buf), |
| 695 | void (*write) (struct regcache *regcache, int regnum, |
| 696 | const gdb_byte *buf)) |
| 697 | { |
| 698 | struct regcache_descr *descr = regcache->descr; |
| 699 | gdb_byte reg[MAX_REGISTER_SIZE]; |
| 700 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
| 701 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); |
| 702 | /* Something to do? */ |
| 703 | if (offset + len == 0) |
| 704 | return; |
| 705 | /* Read (when needed) ... */ |
| 706 | if (in != NULL |
| 707 | || offset > 0 |
| 708 | || offset + len < descr->sizeof_register[regnum]) |
| 709 | { |
| 710 | gdb_assert (read != NULL); |
| 711 | read (regcache, regnum, reg); |
| 712 | } |
| 713 | /* ... modify ... */ |
| 714 | if (in != NULL) |
| 715 | memcpy (in, reg + offset, len); |
| 716 | if (out != NULL) |
| 717 | memcpy (reg + offset, out, len); |
| 718 | /* ... write (when needed). */ |
| 719 | if (out != NULL) |
| 720 | { |
| 721 | gdb_assert (write != NULL); |
| 722 | write (regcache, regnum, reg); |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | void |
| 727 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
| 728 | int offset, int len, gdb_byte *buf) |
| 729 | { |
| 730 | struct regcache_descr *descr = regcache->descr; |
| 731 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 732 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 733 | regcache_raw_read, regcache_raw_write); |
| 734 | } |
| 735 | |
| 736 | void |
| 737 | regcache_raw_write_part (struct regcache *regcache, int regnum, |
| 738 | int offset, int len, const gdb_byte *buf) |
| 739 | { |
| 740 | struct regcache_descr *descr = regcache->descr; |
| 741 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 742 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 743 | regcache_raw_read, regcache_raw_write); |
| 744 | } |
| 745 | |
| 746 | void |
| 747 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
| 748 | int offset, int len, gdb_byte *buf) |
| 749 | { |
| 750 | struct regcache_descr *descr = regcache->descr; |
| 751 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 752 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 753 | regcache_cooked_read, regcache_cooked_write); |
| 754 | } |
| 755 | |
| 756 | void |
| 757 | regcache_cooked_write_part (struct regcache *regcache, int regnum, |
| 758 | int offset, int len, const gdb_byte *buf) |
| 759 | { |
| 760 | struct regcache_descr *descr = regcache->descr; |
| 761 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 762 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 763 | regcache_cooked_read, regcache_cooked_write); |
| 764 | } |
| 765 | |
| 766 | /* Hack to keep code that view the register buffer as raw bytes |
| 767 | working. */ |
| 768 | |
| 769 | int |
| 770 | register_offset_hack (struct gdbarch *gdbarch, int regnum) |
| 771 | { |
| 772 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 773 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 774 | return descr->register_offset[regnum]; |
| 775 | } |
| 776 | |
| 777 | |
| 778 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
| 779 | |
| 780 | void |
| 781 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
| 782 | { |
| 783 | void *regbuf; |
| 784 | size_t size; |
| 785 | |
| 786 | gdb_assert (regcache != NULL); |
| 787 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 788 | gdb_assert (!regcache->readonly_p); |
| 789 | |
| 790 | regbuf = register_buffer (regcache, regnum); |
| 791 | size = regcache->descr->sizeof_register[regnum]; |
| 792 | |
| 793 | if (buf) |
| 794 | memcpy (regbuf, buf, size); |
| 795 | else |
| 796 | memset (regbuf, 0, size); |
| 797 | |
| 798 | /* Mark the register as cached. */ |
| 799 | regcache->register_valid_p[regnum] = 1; |
| 800 | } |
| 801 | |
| 802 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
| 803 | |
| 804 | void |
| 805 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
| 806 | { |
| 807 | const void *regbuf; |
| 808 | size_t size; |
| 809 | |
| 810 | gdb_assert (regcache != NULL && buf != NULL); |
| 811 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 812 | |
| 813 | regbuf = register_buffer (regcache, regnum); |
| 814 | size = regcache->descr->sizeof_register[regnum]; |
| 815 | memcpy (buf, regbuf, size); |
| 816 | } |
| 817 | |
| 818 | |
| 819 | /* read_pc, write_pc, etc. Special handling for register PC. */ |
| 820 | |
| 821 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc() and |
| 822 | read_sp(), will eventually be replaced by per-frame methods. |
| 823 | Instead of relying on the global INFERIOR_PTID, they will use the |
| 824 | contextual information provided by the FRAME. These functions do |
| 825 | not belong in the register cache. */ |
| 826 | |
| 827 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
| 828 | write_pc_pid() and write_pc(), all need to be replaced by something |
| 829 | that does not rely on global state. But what? */ |
| 830 | |
| 831 | CORE_ADDR |
| 832 | read_pc_pid (ptid_t ptid) |
| 833 | { |
| 834 | struct regcache *regcache = get_thread_regcache (ptid); |
| 835 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 836 | |
| 837 | CORE_ADDR pc_val; |
| 838 | |
| 839 | if (gdbarch_read_pc_p (gdbarch)) |
| 840 | pc_val = gdbarch_read_pc (gdbarch, regcache); |
| 841 | /* Else use per-frame method on get_current_frame. */ |
| 842 | else if (gdbarch_pc_regnum (current_gdbarch) >= 0) |
| 843 | { |
| 844 | ULONGEST raw_val; |
| 845 | regcache_cooked_read_unsigned (regcache, |
| 846 | gdbarch_pc_regnum (current_gdbarch), |
| 847 | &raw_val); |
| 848 | pc_val = gdbarch_addr_bits_remove (current_gdbarch, raw_val); |
| 849 | } |
| 850 | else |
| 851 | internal_error (__FILE__, __LINE__, _("read_pc_pid: Unable to find PC")); |
| 852 | |
| 853 | return pc_val; |
| 854 | } |
| 855 | |
| 856 | CORE_ADDR |
| 857 | read_pc (void) |
| 858 | { |
| 859 | return read_pc_pid (inferior_ptid); |
| 860 | } |
| 861 | |
| 862 | void |
| 863 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
| 864 | { |
| 865 | struct regcache *regcache = get_thread_regcache (ptid); |
| 866 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 867 | |
| 868 | if (gdbarch_write_pc_p (gdbarch)) |
| 869 | gdbarch_write_pc (gdbarch, regcache, pc); |
| 870 | else if (gdbarch_pc_regnum (current_gdbarch) >= 0) |
| 871 | regcache_cooked_write_unsigned (regcache, |
| 872 | gdbarch_pc_regnum (current_gdbarch), pc); |
| 873 | else |
| 874 | internal_error (__FILE__, __LINE__, |
| 875 | _("write_pc_pid: Unable to update PC")); |
| 876 | } |
| 877 | |
| 878 | void |
| 879 | write_pc (CORE_ADDR pc) |
| 880 | { |
| 881 | write_pc_pid (pc, inferior_ptid); |
| 882 | } |
| 883 | |
| 884 | |
| 885 | static void |
| 886 | reg_flush_command (char *command, int from_tty) |
| 887 | { |
| 888 | /* Force-flush the register cache. */ |
| 889 | registers_changed (); |
| 890 | if (from_tty) |
| 891 | printf_filtered (_("Register cache flushed.\n")); |
| 892 | } |
| 893 | |
| 894 | static void |
| 895 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, |
| 896 | const unsigned char *buf, long len) |
| 897 | { |
| 898 | int i; |
| 899 | switch (endian) |
| 900 | { |
| 901 | case BFD_ENDIAN_BIG: |
| 902 | for (i = 0; i < len; i++) |
| 903 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 904 | break; |
| 905 | case BFD_ENDIAN_LITTLE: |
| 906 | for (i = len - 1; i >= 0; i--) |
| 907 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 908 | break; |
| 909 | default: |
| 910 | internal_error (__FILE__, __LINE__, _("Bad switch")); |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | enum regcache_dump_what |
| 915 | { |
| 916 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
| 917 | }; |
| 918 | |
| 919 | static void |
| 920 | regcache_dump (struct regcache *regcache, struct ui_file *file, |
| 921 | enum regcache_dump_what what_to_dump) |
| 922 | { |
| 923 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 924 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
| 925 | int regnum; |
| 926 | int footnote_nr = 0; |
| 927 | int footnote_register_size = 0; |
| 928 | int footnote_register_offset = 0; |
| 929 | int footnote_register_type_name_null = 0; |
| 930 | long register_offset = 0; |
| 931 | unsigned char buf[MAX_REGISTER_SIZE]; |
| 932 | |
| 933 | #if 0 |
| 934 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
| 935 | regcache->descr->nr_raw_registers); |
| 936 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", |
| 937 | regcache->descr->nr_cooked_registers); |
| 938 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", |
| 939 | regcache->descr->sizeof_raw_registers); |
| 940 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", |
| 941 | regcache->descr->sizeof_raw_register_valid_p); |
| 942 | fprintf_unfiltered (file, "gdbarch_num_regs %d\n", |
| 943 | gdbarch_num_regs (current_gdbarch)); |
| 944 | fprintf_unfiltered (file, "gdbarch_num_pseudo_regs %d\n", |
| 945 | gdbarch_num_pseudo_regs (current_gdbarch)); |
| 946 | #endif |
| 947 | |
| 948 | gdb_assert (regcache->descr->nr_cooked_registers |
| 949 | == (gdbarch_num_regs (current_gdbarch) |
| 950 | + gdbarch_num_pseudo_regs (current_gdbarch))); |
| 951 | |
| 952 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) |
| 953 | { |
| 954 | /* Name. */ |
| 955 | if (regnum < 0) |
| 956 | fprintf_unfiltered (file, " %-10s", "Name"); |
| 957 | else |
| 958 | { |
| 959 | const char *p = gdbarch_register_name (current_gdbarch, regnum); |
| 960 | if (p == NULL) |
| 961 | p = ""; |
| 962 | else if (p[0] == '\0') |
| 963 | p = "''"; |
| 964 | fprintf_unfiltered (file, " %-10s", p); |
| 965 | } |
| 966 | |
| 967 | /* Number. */ |
| 968 | if (regnum < 0) |
| 969 | fprintf_unfiltered (file, " %4s", "Nr"); |
| 970 | else |
| 971 | fprintf_unfiltered (file, " %4d", regnum); |
| 972 | |
| 973 | /* Relative number. */ |
| 974 | if (regnum < 0) |
| 975 | fprintf_unfiltered (file, " %4s", "Rel"); |
| 976 | else if (regnum < gdbarch_num_regs (current_gdbarch)) |
| 977 | fprintf_unfiltered (file, " %4d", regnum); |
| 978 | else |
| 979 | fprintf_unfiltered (file, " %4d", |
| 980 | (regnum - gdbarch_num_regs (current_gdbarch))); |
| 981 | |
| 982 | /* Offset. */ |
| 983 | if (regnum < 0) |
| 984 | fprintf_unfiltered (file, " %6s ", "Offset"); |
| 985 | else |
| 986 | { |
| 987 | fprintf_unfiltered (file, " %6ld", |
| 988 | regcache->descr->register_offset[regnum]); |
| 989 | if (register_offset != regcache->descr->register_offset[regnum] |
| 990 | || (regnum > 0 |
| 991 | && (regcache->descr->register_offset[regnum] |
| 992 | != (regcache->descr->register_offset[regnum - 1] |
| 993 | + regcache->descr->sizeof_register[regnum - 1]))) |
| 994 | ) |
| 995 | { |
| 996 | if (!footnote_register_offset) |
| 997 | footnote_register_offset = ++footnote_nr; |
| 998 | fprintf_unfiltered (file, "*%d", footnote_register_offset); |
| 999 | } |
| 1000 | else |
| 1001 | fprintf_unfiltered (file, " "); |
| 1002 | register_offset = (regcache->descr->register_offset[regnum] |
| 1003 | + regcache->descr->sizeof_register[regnum]); |
| 1004 | } |
| 1005 | |
| 1006 | /* Size. */ |
| 1007 | if (regnum < 0) |
| 1008 | fprintf_unfiltered (file, " %5s ", "Size"); |
| 1009 | else |
| 1010 | fprintf_unfiltered (file, " %5ld", |
| 1011 | regcache->descr->sizeof_register[regnum]); |
| 1012 | |
| 1013 | /* Type. */ |
| 1014 | { |
| 1015 | const char *t; |
| 1016 | if (regnum < 0) |
| 1017 | t = "Type"; |
| 1018 | else |
| 1019 | { |
| 1020 | static const char blt[] = "builtin_type"; |
| 1021 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); |
| 1022 | if (t == NULL) |
| 1023 | { |
| 1024 | char *n; |
| 1025 | if (!footnote_register_type_name_null) |
| 1026 | footnote_register_type_name_null = ++footnote_nr; |
| 1027 | n = xstrprintf ("*%d", footnote_register_type_name_null); |
| 1028 | make_cleanup (xfree, n); |
| 1029 | t = n; |
| 1030 | } |
| 1031 | /* Chop a leading builtin_type. */ |
| 1032 | if (strncmp (t, blt, strlen (blt)) == 0) |
| 1033 | t += strlen (blt); |
| 1034 | } |
| 1035 | fprintf_unfiltered (file, " %-15s", t); |
| 1036 | } |
| 1037 | |
| 1038 | /* Leading space always present. */ |
| 1039 | fprintf_unfiltered (file, " "); |
| 1040 | |
| 1041 | /* Value, raw. */ |
| 1042 | if (what_to_dump == regcache_dump_raw) |
| 1043 | { |
| 1044 | if (regnum < 0) |
| 1045 | fprintf_unfiltered (file, "Raw value"); |
| 1046 | else if (regnum >= regcache->descr->nr_raw_registers) |
| 1047 | fprintf_unfiltered (file, "<cooked>"); |
| 1048 | else if (!regcache_valid_p (regcache, regnum)) |
| 1049 | fprintf_unfiltered (file, "<invalid>"); |
| 1050 | else |
| 1051 | { |
| 1052 | regcache_raw_read (regcache, regnum, buf); |
| 1053 | fprintf_unfiltered (file, "0x"); |
| 1054 | dump_endian_bytes (file, |
| 1055 | gdbarch_byte_order (current_gdbarch), buf, |
| 1056 | regcache->descr->sizeof_register[regnum]); |
| 1057 | } |
| 1058 | } |
| 1059 | |
| 1060 | /* Value, cooked. */ |
| 1061 | if (what_to_dump == regcache_dump_cooked) |
| 1062 | { |
| 1063 | if (regnum < 0) |
| 1064 | fprintf_unfiltered (file, "Cooked value"); |
| 1065 | else |
| 1066 | { |
| 1067 | regcache_cooked_read (regcache, regnum, buf); |
| 1068 | fprintf_unfiltered (file, "0x"); |
| 1069 | dump_endian_bytes (file, |
| 1070 | gdbarch_byte_order (current_gdbarch), buf, |
| 1071 | regcache->descr->sizeof_register[regnum]); |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | /* Group members. */ |
| 1076 | if (what_to_dump == regcache_dump_groups) |
| 1077 | { |
| 1078 | if (regnum < 0) |
| 1079 | fprintf_unfiltered (file, "Groups"); |
| 1080 | else |
| 1081 | { |
| 1082 | const char *sep = ""; |
| 1083 | struct reggroup *group; |
| 1084 | for (group = reggroup_next (gdbarch, NULL); |
| 1085 | group != NULL; |
| 1086 | group = reggroup_next (gdbarch, group)) |
| 1087 | { |
| 1088 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 1089 | { |
| 1090 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group)); |
| 1091 | sep = ","; |
| 1092 | } |
| 1093 | } |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | fprintf_unfiltered (file, "\n"); |
| 1098 | } |
| 1099 | |
| 1100 | if (footnote_register_size) |
| 1101 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", |
| 1102 | footnote_register_size); |
| 1103 | if (footnote_register_offset) |
| 1104 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", |
| 1105 | footnote_register_offset); |
| 1106 | if (footnote_register_type_name_null) |
| 1107 | fprintf_unfiltered (file, |
| 1108 | "*%d: Register type's name NULL.\n", |
| 1109 | footnote_register_type_name_null); |
| 1110 | do_cleanups (cleanups); |
| 1111 | } |
| 1112 | |
| 1113 | static void |
| 1114 | regcache_print (char *args, enum regcache_dump_what what_to_dump) |
| 1115 | { |
| 1116 | if (args == NULL) |
| 1117 | regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump); |
| 1118 | else |
| 1119 | { |
| 1120 | struct ui_file *file = gdb_fopen (args, "w"); |
| 1121 | if (file == NULL) |
| 1122 | perror_with_name (_("maintenance print architecture")); |
| 1123 | regcache_dump (get_current_regcache (), file, what_to_dump); |
| 1124 | ui_file_delete (file); |
| 1125 | } |
| 1126 | } |
| 1127 | |
| 1128 | static void |
| 1129 | maintenance_print_registers (char *args, int from_tty) |
| 1130 | { |
| 1131 | regcache_print (args, regcache_dump_none); |
| 1132 | } |
| 1133 | |
| 1134 | static void |
| 1135 | maintenance_print_raw_registers (char *args, int from_tty) |
| 1136 | { |
| 1137 | regcache_print (args, regcache_dump_raw); |
| 1138 | } |
| 1139 | |
| 1140 | static void |
| 1141 | maintenance_print_cooked_registers (char *args, int from_tty) |
| 1142 | { |
| 1143 | regcache_print (args, regcache_dump_cooked); |
| 1144 | } |
| 1145 | |
| 1146 | static void |
| 1147 | maintenance_print_register_groups (char *args, int from_tty) |
| 1148 | { |
| 1149 | regcache_print (args, regcache_dump_groups); |
| 1150 | } |
| 1151 | |
| 1152 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
| 1153 | |
| 1154 | void |
| 1155 | _initialize_regcache (void) |
| 1156 | { |
| 1157 | regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr); |
| 1158 | |
| 1159 | observer_attach_target_changed (regcache_observer_target_changed); |
| 1160 | |
| 1161 | add_com ("flushregs", class_maintenance, reg_flush_command, |
| 1162 | _("Force gdb to flush its register cache (maintainer command)")); |
| 1163 | |
| 1164 | add_cmd ("registers", class_maintenance, maintenance_print_registers, _("\ |
| 1165 | Print the internal register configuration.\n\ |
| 1166 | Takes an optional file parameter."), &maintenanceprintlist); |
| 1167 | add_cmd ("raw-registers", class_maintenance, |
| 1168 | maintenance_print_raw_registers, _("\ |
| 1169 | Print the internal register configuration including raw values.\n\ |
| 1170 | Takes an optional file parameter."), &maintenanceprintlist); |
| 1171 | add_cmd ("cooked-registers", class_maintenance, |
| 1172 | maintenance_print_cooked_registers, _("\ |
| 1173 | Print the internal register configuration including cooked values.\n\ |
| 1174 | Takes an optional file parameter."), &maintenanceprintlist); |
| 1175 | add_cmd ("register-groups", class_maintenance, |
| 1176 | maintenance_print_register_groups, _("\ |
| 1177 | Print the internal register configuration including each register's group.\n\ |
| 1178 | Takes an optional file parameter."), |
| 1179 | &maintenanceprintlist); |
| 1180 | |
| 1181 | } |