| 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, |
| 4 | 2001, 2002, 2004 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., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, 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 regigisters 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 = NUM_REGS + NUM_PSEUDO_REGS; |
| 98 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
| 99 | |
| 100 | /* Fill in a table of register types. */ |
| 101 | descr->register_type |
| 102 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *); |
| 103 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 104 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
| 105 | |
| 106 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
| 107 | into the register cache. */ |
| 108 | descr->nr_raw_registers = NUM_REGS; |
| 109 | |
| 110 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p |
| 111 | array. This pretects GDB from erant code that accesses elements |
| 112 | of the global register_valid_p[] array in the range [NUM_REGS |
| 113 | .. NUM_REGS + NUM_PSEUDO_REGS). */ |
| 114 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
| 115 | |
| 116 | /* Lay out the register cache. |
| 117 | |
| 118 | NOTE: cagney/2002-05-22: Only register_type() is used when |
| 119 | constructing the register cache. It is assumed that the |
| 120 | register's raw size, virtual size and type length are all the |
| 121 | same. */ |
| 122 | |
| 123 | { |
| 124 | long offset = 0; |
| 125 | descr->sizeof_register |
| 126 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 127 | descr->register_offset |
| 128 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 129 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 130 | { |
| 131 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
| 132 | descr->register_offset[i] = offset; |
| 133 | offset += descr->sizeof_register[i]; |
| 134 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
| 135 | } |
| 136 | /* Set the real size of the register cache buffer. */ |
| 137 | descr->sizeof_cooked_registers = offset; |
| 138 | } |
| 139 | |
| 140 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
| 141 | the raw registers. Unfortunately some code still accesses the |
| 142 | register array directly using the global registers[]. Until that |
| 143 | code has been purged, play safe and over allocating the register |
| 144 | buffer. Ulgh! */ |
| 145 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; |
| 146 | |
| 147 | return descr; |
| 148 | } |
| 149 | |
| 150 | static struct regcache_descr * |
| 151 | regcache_descr (struct gdbarch *gdbarch) |
| 152 | { |
| 153 | return gdbarch_data (gdbarch, regcache_descr_handle); |
| 154 | } |
| 155 | |
| 156 | /* Utility functions returning useful register attributes stored in |
| 157 | the regcache descr. */ |
| 158 | |
| 159 | struct type * |
| 160 | register_type (struct gdbarch *gdbarch, int regnum) |
| 161 | { |
| 162 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 163 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 164 | return descr->register_type[regnum]; |
| 165 | } |
| 166 | |
| 167 | /* Utility functions returning useful register attributes stored in |
| 168 | the regcache descr. */ |
| 169 | |
| 170 | int |
| 171 | register_size (struct gdbarch *gdbarch, int regnum) |
| 172 | { |
| 173 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 174 | int size; |
| 175 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 176 | size = descr->sizeof_register[regnum]; |
| 177 | return size; |
| 178 | } |
| 179 | |
| 180 | /* The register cache for storing raw register values. */ |
| 181 | |
| 182 | struct regcache |
| 183 | { |
| 184 | struct regcache_descr *descr; |
| 185 | /* The register buffers. A read-only register cache can hold the |
| 186 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write |
| 187 | register cache can only hold [0 .. NUM_REGS). */ |
| 188 | char *registers; |
| 189 | char *register_valid_p; |
| 190 | /* Is this a read-only cache? A read-only cache is used for saving |
| 191 | the target's register state (e.g, across an inferior function |
| 192 | call or just before forcing a function return). A read-only |
| 193 | cache can only be updated via the methods regcache_dup() and |
| 194 | regcache_cpy(). The actual contents are determined by the |
| 195 | reggroup_save and reggroup_restore methods. */ |
| 196 | int readonly_p; |
| 197 | }; |
| 198 | |
| 199 | struct regcache * |
| 200 | regcache_xmalloc (struct gdbarch *gdbarch) |
| 201 | { |
| 202 | struct regcache_descr *descr; |
| 203 | struct regcache *regcache; |
| 204 | gdb_assert (gdbarch != NULL); |
| 205 | descr = regcache_descr (gdbarch); |
| 206 | regcache = XMALLOC (struct regcache); |
| 207 | regcache->descr = descr; |
| 208 | regcache->registers |
| 209 | = XCALLOC (descr->sizeof_raw_registers, char); |
| 210 | regcache->register_valid_p |
| 211 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
| 212 | regcache->readonly_p = 1; |
| 213 | return regcache; |
| 214 | } |
| 215 | |
| 216 | void |
| 217 | regcache_xfree (struct regcache *regcache) |
| 218 | { |
| 219 | if (regcache == NULL) |
| 220 | return; |
| 221 | xfree (regcache->registers); |
| 222 | xfree (regcache->register_valid_p); |
| 223 | xfree (regcache); |
| 224 | } |
| 225 | |
| 226 | static void |
| 227 | do_regcache_xfree (void *data) |
| 228 | { |
| 229 | regcache_xfree (data); |
| 230 | } |
| 231 | |
| 232 | struct cleanup * |
| 233 | make_cleanup_regcache_xfree (struct regcache *regcache) |
| 234 | { |
| 235 | return make_cleanup (do_regcache_xfree, regcache); |
| 236 | } |
| 237 | |
| 238 | /* Return REGCACHE's architecture. */ |
| 239 | |
| 240 | struct gdbarch * |
| 241 | get_regcache_arch (const struct regcache *regcache) |
| 242 | { |
| 243 | return regcache->descr->gdbarch; |
| 244 | } |
| 245 | |
| 246 | /* Return a pointer to register REGNUM's buffer cache. */ |
| 247 | |
| 248 | static char * |
| 249 | register_buffer (const struct regcache *regcache, int regnum) |
| 250 | { |
| 251 | return regcache->registers + regcache->descr->register_offset[regnum]; |
| 252 | } |
| 253 | |
| 254 | void |
| 255 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
| 256 | void *src) |
| 257 | { |
| 258 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 259 | char buf[MAX_REGISTER_SIZE]; |
| 260 | int regnum; |
| 261 | /* The DST should be `read-only', if it wasn't then the save would |
| 262 | end up trying to write the register values back out to the |
| 263 | target. */ |
| 264 | gdb_assert (dst->readonly_p); |
| 265 | /* Clear the dest. */ |
| 266 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); |
| 267 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); |
| 268 | /* Copy over any registers (identified by their membership in the |
| 269 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
| 270 | NUM_PSEUDO_REGS) range is checked since some architectures need |
| 271 | to save/restore `cooked' registers that live in memory. */ |
| 272 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 273 | { |
| 274 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) |
| 275 | { |
| 276 | int valid = cooked_read (src, regnum, buf); |
| 277 | if (valid) |
| 278 | { |
| 279 | memcpy (register_buffer (dst, regnum), buf, |
| 280 | register_size (gdbarch, regnum)); |
| 281 | dst->register_valid_p[regnum] = 1; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | void |
| 288 | regcache_restore (struct regcache *dst, |
| 289 | regcache_cooked_read_ftype *cooked_read, |
| 290 | void *src) |
| 291 | { |
| 292 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 293 | char buf[MAX_REGISTER_SIZE]; |
| 294 | int regnum; |
| 295 | /* The dst had better not be read-only. If it is, the `restore' |
| 296 | doesn't make much sense. */ |
| 297 | gdb_assert (!dst->readonly_p); |
| 298 | /* Copy over any registers, being careful to only restore those that |
| 299 | were both saved and need to be restored. The full [0 .. NUM_REGS |
| 300 | + 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, restore_reggroup)) |
| 305 | { |
| 306 | int valid = cooked_read (src, regnum, buf); |
| 307 | if (valid) |
| 308 | regcache_cooked_write (dst, regnum, buf); |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | static int |
| 314 | do_cooked_read (void *src, int regnum, void *buf) |
| 315 | { |
| 316 | struct regcache *regcache = src; |
| 317 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
| 318 | /* Don't even think about fetching a register from a read-only |
| 319 | cache when the register isn't yet valid. There isn't a target |
| 320 | from which the register value can be fetched. */ |
| 321 | return 0; |
| 322 | regcache_cooked_read (regcache, regnum, buf); |
| 323 | return 1; |
| 324 | } |
| 325 | |
| 326 | |
| 327 | void |
| 328 | regcache_cpy (struct regcache *dst, struct regcache *src) |
| 329 | { |
| 330 | int i; |
| 331 | char *buf; |
| 332 | gdb_assert (src != NULL && dst != NULL); |
| 333 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 334 | gdb_assert (src != dst); |
| 335 | gdb_assert (src->readonly_p || dst->readonly_p); |
| 336 | if (!src->readonly_p) |
| 337 | regcache_save (dst, do_cooked_read, src); |
| 338 | else if (!dst->readonly_p) |
| 339 | regcache_restore (dst, do_cooked_read, src); |
| 340 | else |
| 341 | regcache_cpy_no_passthrough (dst, src); |
| 342 | } |
| 343 | |
| 344 | void |
| 345 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) |
| 346 | { |
| 347 | int i; |
| 348 | gdb_assert (src != NULL && dst != NULL); |
| 349 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 350 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough |
| 351 | move of data into the current_regcache(). Doing this would be |
| 352 | silly - it would mean that valid_p would be completely invalid. */ |
| 353 | gdb_assert (dst != current_regcache); |
| 354 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
| 355 | memcpy (dst->register_valid_p, src->register_valid_p, |
| 356 | dst->descr->sizeof_raw_register_valid_p); |
| 357 | } |
| 358 | |
| 359 | struct regcache * |
| 360 | regcache_dup (struct regcache *src) |
| 361 | { |
| 362 | struct regcache *newbuf; |
| 363 | gdb_assert (current_regcache != NULL); |
| 364 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 365 | regcache_cpy (newbuf, src); |
| 366 | return newbuf; |
| 367 | } |
| 368 | |
| 369 | struct regcache * |
| 370 | regcache_dup_no_passthrough (struct regcache *src) |
| 371 | { |
| 372 | struct regcache *newbuf; |
| 373 | gdb_assert (current_regcache != NULL); |
| 374 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 375 | regcache_cpy_no_passthrough (newbuf, src); |
| 376 | return newbuf; |
| 377 | } |
| 378 | |
| 379 | int |
| 380 | regcache_valid_p (struct regcache *regcache, int regnum) |
| 381 | { |
| 382 | gdb_assert (regcache != NULL); |
| 383 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 384 | return regcache->register_valid_p[regnum]; |
| 385 | } |
| 386 | |
| 387 | char * |
| 388 | deprecated_grub_regcache_for_registers (struct regcache *regcache) |
| 389 | { |
| 390 | return regcache->registers; |
| 391 | } |
| 392 | |
| 393 | /* Global structure containing the current regcache. */ |
| 394 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and |
| 395 | deprecated_register_valid[] currently point into this structure. */ |
| 396 | struct regcache *current_regcache; |
| 397 | |
| 398 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
| 399 | recording if the register values have been changed (eg. by the |
| 400 | user). Therefore all registers must be written back to the |
| 401 | target when appropriate. */ |
| 402 | |
| 403 | /* The thread/process associated with the current set of registers. */ |
| 404 | |
| 405 | static ptid_t registers_ptid; |
| 406 | |
| 407 | /* |
| 408 | * FUNCTIONS: |
| 409 | */ |
| 410 | |
| 411 | /* REGISTER_CACHED() |
| 412 | |
| 413 | Returns 0 if the value is not in the cache (needs fetch). |
| 414 | >0 if the value is in the cache. |
| 415 | <0 if the value is permanently unavailable (don't ask again). */ |
| 416 | |
| 417 | int |
| 418 | register_cached (int regnum) |
| 419 | { |
| 420 | return current_regcache->register_valid_p[regnum]; |
| 421 | } |
| 422 | |
| 423 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
| 424 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ |
| 425 | |
| 426 | void |
| 427 | set_register_cached (int regnum, int state) |
| 428 | { |
| 429 | gdb_assert (regnum >= 0); |
| 430 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); |
| 431 | current_regcache->register_valid_p[regnum] = state; |
| 432 | } |
| 433 | |
| 434 | /* Observer for the target_changed event. */ |
| 435 | |
| 436 | void |
| 437 | regcache_observer_target_changed (struct target_ops *target) |
| 438 | { |
| 439 | registers_changed (); |
| 440 | } |
| 441 | |
| 442 | /* Low level examining and depositing of registers. |
| 443 | |
| 444 | The caller is responsible for making sure that the inferior is |
| 445 | stopped before calling the fetching routines, or it will get |
| 446 | garbage. (a change from GDB version 3, in which the caller got the |
| 447 | value from the last stop). */ |
| 448 | |
| 449 | /* REGISTERS_CHANGED () |
| 450 | |
| 451 | Indicate that registers may have changed, so invalidate the cache. */ |
| 452 | |
| 453 | void |
| 454 | registers_changed (void) |
| 455 | { |
| 456 | int i; |
| 457 | |
| 458 | registers_ptid = pid_to_ptid (-1); |
| 459 | |
| 460 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 461 | a builtin alloca. This particular call is used to clean up |
| 462 | areas allocated by low level target code which may build up |
| 463 | during lengthy interactions between gdb and the target before |
| 464 | gdb gives control to the user (ie watchpoints). */ |
| 465 | alloca (0); |
| 466 | |
| 467 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
| 468 | set_register_cached (i, 0); |
| 469 | |
| 470 | if (deprecated_registers_changed_hook) |
| 471 | deprecated_registers_changed_hook (); |
| 472 | } |
| 473 | |
| 474 | /* DEPRECATED_REGISTERS_FETCHED () |
| 475 | |
| 476 | Indicate that all registers have been fetched, so mark them all valid. */ |
| 477 | |
| 478 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target |
| 479 | code was blatting the registers[] array and then calling this. |
| 480 | Since targets should only be using regcache_raw_supply() the need for |
| 481 | this function/hack is eliminated. */ |
| 482 | |
| 483 | void |
| 484 | deprecated_registers_fetched (void) |
| 485 | { |
| 486 | int i; |
| 487 | |
| 488 | for (i = 0; i < NUM_REGS; i++) |
| 489 | set_register_cached (i, 1); |
| 490 | /* Do not assume that the pseudo-regs have also been fetched. |
| 491 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
| 492 | } |
| 493 | |
| 494 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
| 495 | are generally a *BAD* idea. They are inefficient because they need |
| 496 | to check for partial updates, which can only be done by scanning |
| 497 | through all of the registers and seeing if the bytes that are being |
| 498 | read/written fall inside of an invalid register. [The main reason |
| 499 | this is necessary is that register sizes can vary, so a simple |
| 500 | index won't suffice.] It is far better to call read_register_gen |
| 501 | and write_register_gen if you want to get at the raw register |
| 502 | contents, as it only takes a regnum as an argument, and therefore |
| 503 | can't do a partial register update. |
| 504 | |
| 505 | Prior to the recent fixes to check for partial updates, both read |
| 506 | and deprecated_write_register_bytes always checked to see if any |
| 507 | registers were stale, and then called target_fetch_registers (-1) |
| 508 | to update the whole set. This caused really slowed things down for |
| 509 | remote targets. */ |
| 510 | |
| 511 | /* Copy INLEN bytes of consecutive data from registers |
| 512 | starting with the INREGBYTE'th byte of register data |
| 513 | into memory at MYADDR. */ |
| 514 | |
| 515 | void |
| 516 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
| 517 | { |
| 518 | int in_end = in_start + in_len; |
| 519 | int regnum; |
| 520 | char reg_buf[MAX_REGISTER_SIZE]; |
| 521 | |
| 522 | /* See if we are trying to read bytes from out-of-date registers. If so, |
| 523 | update just those registers. */ |
| 524 | |
| 525 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| 526 | { |
| 527 | int reg_start; |
| 528 | int reg_end; |
| 529 | int reg_len; |
| 530 | int start; |
| 531 | int end; |
| 532 | int byte; |
| 533 | |
| 534 | reg_start = DEPRECATED_REGISTER_BYTE (regnum); |
| 535 | reg_len = register_size (current_gdbarch, regnum); |
| 536 | reg_end = reg_start + reg_len; |
| 537 | |
| 538 | if (reg_end <= in_start || in_end <= reg_start) |
| 539 | /* The range the user wants to read doesn't overlap with regnum. */ |
| 540 | continue; |
| 541 | |
| 542 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
| 543 | /* Force the cache to fetch the entire register. */ |
| 544 | deprecated_read_register_gen (regnum, reg_buf); |
| 545 | |
| 546 | /* Legacy note: This function, for some reason, allows a NULL |
| 547 | input buffer. If the buffer is NULL, the registers are still |
| 548 | fetched, just the final transfer is skipped. */ |
| 549 | if (in_buf == NULL) |
| 550 | continue; |
| 551 | |
| 552 | /* start = max (reg_start, in_start) */ |
| 553 | if (reg_start > in_start) |
| 554 | start = reg_start; |
| 555 | else |
| 556 | start = in_start; |
| 557 | |
| 558 | /* end = min (reg_end, in_end) */ |
| 559 | if (reg_end < in_end) |
| 560 | end = reg_end; |
| 561 | else |
| 562 | end = in_end; |
| 563 | |
| 564 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ |
| 565 | for (byte = start; byte < end; byte++) |
| 566 | { |
| 567 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
| 568 | } |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | void |
| 573 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
| 574 | { |
| 575 | gdb_assert (regcache != NULL && buf != NULL); |
| 576 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 577 | /* Make certain that the register cache is up-to-date with respect |
| 578 | to the current thread. This switching shouldn't be necessary |
| 579 | only there is still only one target side register cache. Sigh! |
| 580 | On the bright side, at least there is a regcache object. */ |
| 581 | if (!regcache->readonly_p) |
| 582 | { |
| 583 | gdb_assert (regcache == current_regcache); |
| 584 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 585 | { |
| 586 | registers_changed (); |
| 587 | registers_ptid = inferior_ptid; |
| 588 | } |
| 589 | if (!register_cached (regnum)) |
| 590 | target_fetch_registers (regnum); |
| 591 | #if 0 |
| 592 | /* FIXME: cagney/2004-08-07: At present a number of targets |
| 593 | forget (or didn't know that they needed) to set this leading to |
| 594 | panics. Also is the problem that targets need to indicate |
| 595 | that a register is in one of the possible states: valid, |
| 596 | undefined, unknown. The last of which isn't yet |
| 597 | possible. */ |
| 598 | gdb_assert (register_cached (regnum)); |
| 599 | #endif |
| 600 | } |
| 601 | /* Copy the value directly into the register cache. */ |
| 602 | memcpy (buf, register_buffer (regcache, regnum), |
| 603 | regcache->descr->sizeof_register[regnum]); |
| 604 | } |
| 605 | |
| 606 | void |
| 607 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
| 608 | { |
| 609 | char *buf; |
| 610 | gdb_assert (regcache != NULL); |
| 611 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 612 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 613 | regcache_raw_read (regcache, regnum, buf); |
| 614 | (*val) = extract_signed_integer (buf, |
| 615 | regcache->descr->sizeof_register[regnum]); |
| 616 | } |
| 617 | |
| 618 | void |
| 619 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
| 620 | ULONGEST *val) |
| 621 | { |
| 622 | char *buf; |
| 623 | gdb_assert (regcache != NULL); |
| 624 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 625 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 626 | regcache_raw_read (regcache, regnum, buf); |
| 627 | (*val) = extract_unsigned_integer (buf, |
| 628 | regcache->descr->sizeof_register[regnum]); |
| 629 | } |
| 630 | |
| 631 | void |
| 632 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) |
| 633 | { |
| 634 | void *buf; |
| 635 | gdb_assert (regcache != NULL); |
| 636 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 637 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 638 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 639 | regcache_raw_write (regcache, regnum, buf); |
| 640 | } |
| 641 | |
| 642 | void |
| 643 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, |
| 644 | ULONGEST val) |
| 645 | { |
| 646 | void *buf; |
| 647 | gdb_assert (regcache != NULL); |
| 648 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 649 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 650 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 651 | regcache_raw_write (regcache, regnum, buf); |
| 652 | } |
| 653 | |
| 654 | void |
| 655 | deprecated_read_register_gen (int regnum, char *buf) |
| 656 | { |
| 657 | gdb_assert (current_regcache != NULL); |
| 658 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); |
| 659 | regcache_cooked_read (current_regcache, regnum, buf); |
| 660 | } |
| 661 | |
| 662 | void |
| 663 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
| 664 | { |
| 665 | gdb_assert (regnum >= 0); |
| 666 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 667 | if (regnum < regcache->descr->nr_raw_registers) |
| 668 | regcache_raw_read (regcache, regnum, buf); |
| 669 | else if (regcache->readonly_p |
| 670 | && regnum < regcache->descr->nr_cooked_registers |
| 671 | && regcache->register_valid_p[regnum]) |
| 672 | /* Read-only register cache, perhaps the cooked value was cached? */ |
| 673 | memcpy (buf, register_buffer (regcache, regnum), |
| 674 | regcache->descr->sizeof_register[regnum]); |
| 675 | else |
| 676 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
| 677 | regnum, buf); |
| 678 | } |
| 679 | |
| 680 | void |
| 681 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
| 682 | LONGEST *val) |
| 683 | { |
| 684 | char *buf; |
| 685 | gdb_assert (regcache != NULL); |
| 686 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 687 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 688 | regcache_cooked_read (regcache, regnum, buf); |
| 689 | (*val) = extract_signed_integer (buf, |
| 690 | regcache->descr->sizeof_register[regnum]); |
| 691 | } |
| 692 | |
| 693 | void |
| 694 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
| 695 | ULONGEST *val) |
| 696 | { |
| 697 | char *buf; |
| 698 | gdb_assert (regcache != NULL); |
| 699 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 700 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 701 | regcache_cooked_read (regcache, regnum, buf); |
| 702 | (*val) = extract_unsigned_integer (buf, |
| 703 | regcache->descr->sizeof_register[regnum]); |
| 704 | } |
| 705 | |
| 706 | void |
| 707 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, |
| 708 | LONGEST val) |
| 709 | { |
| 710 | void *buf; |
| 711 | gdb_assert (regcache != NULL); |
| 712 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 713 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 714 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 715 | regcache_cooked_write (regcache, regnum, buf); |
| 716 | } |
| 717 | |
| 718 | void |
| 719 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, |
| 720 | ULONGEST val) |
| 721 | { |
| 722 | void *buf; |
| 723 | gdb_assert (regcache != NULL); |
| 724 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 725 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 726 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 727 | regcache_cooked_write (regcache, regnum, buf); |
| 728 | } |
| 729 | |
| 730 | void |
| 731 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
| 732 | { |
| 733 | gdb_assert (regcache != NULL && buf != NULL); |
| 734 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 735 | gdb_assert (!regcache->readonly_p); |
| 736 | |
| 737 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 738 | change the registers array if something writes to this register. */ |
| 739 | if (CANNOT_STORE_REGISTER (regnum)) |
| 740 | return; |
| 741 | |
| 742 | /* Make certain that the correct cache is selected. */ |
| 743 | gdb_assert (regcache == current_regcache); |
| 744 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 745 | { |
| 746 | registers_changed (); |
| 747 | registers_ptid = inferior_ptid; |
| 748 | } |
| 749 | |
| 750 | /* If we have a valid copy of the register, and new value == old |
| 751 | value, then don't bother doing the actual store. */ |
| 752 | if (regcache_valid_p (regcache, regnum) |
| 753 | && (memcmp (register_buffer (regcache, regnum), buf, |
| 754 | regcache->descr->sizeof_register[regnum]) == 0)) |
| 755 | return; |
| 756 | |
| 757 | target_prepare_to_store (); |
| 758 | memcpy (register_buffer (regcache, regnum), buf, |
| 759 | regcache->descr->sizeof_register[regnum]); |
| 760 | regcache->register_valid_p[regnum] = 1; |
| 761 | target_store_registers (regnum); |
| 762 | } |
| 763 | |
| 764 | void |
| 765 | deprecated_write_register_gen (int regnum, char *buf) |
| 766 | { |
| 767 | gdb_assert (current_regcache != NULL); |
| 768 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); |
| 769 | regcache_cooked_write (current_regcache, regnum, buf); |
| 770 | } |
| 771 | |
| 772 | void |
| 773 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
| 774 | { |
| 775 | gdb_assert (regnum >= 0); |
| 776 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 777 | if (regnum < regcache->descr->nr_raw_registers) |
| 778 | regcache_raw_write (regcache, regnum, buf); |
| 779 | else |
| 780 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
| 781 | regnum, buf); |
| 782 | } |
| 783 | |
| 784 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
| 785 | into registers starting with the MYREGSTART'th byte of register data. */ |
| 786 | |
| 787 | void |
| 788 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
| 789 | { |
| 790 | int myregend = myregstart + inlen; |
| 791 | int regnum; |
| 792 | |
| 793 | target_prepare_to_store (); |
| 794 | |
| 795 | /* Scan through the registers updating any that are covered by the |
| 796 | range myregstart<=>myregend using write_register_gen, which does |
| 797 | nice things like handling threads, and avoiding updates when the |
| 798 | new and old contents are the same. */ |
| 799 | |
| 800 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| 801 | { |
| 802 | int regstart, regend; |
| 803 | |
| 804 | regstart = DEPRECATED_REGISTER_BYTE (regnum); |
| 805 | regend = regstart + register_size (current_gdbarch, regnum); |
| 806 | |
| 807 | /* Is this register completely outside the range the user is writing? */ |
| 808 | if (myregend <= regstart || regend <= myregstart) |
| 809 | /* do nothing */ ; |
| 810 | |
| 811 | /* Is this register completely within the range the user is writing? */ |
| 812 | else if (myregstart <= regstart && regend <= myregend) |
| 813 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
| 814 | |
| 815 | /* The register partially overlaps the range being written. */ |
| 816 | else |
| 817 | { |
| 818 | char regbuf[MAX_REGISTER_SIZE]; |
| 819 | /* What's the overlap between this register's bytes and |
| 820 | those the caller wants to write? */ |
| 821 | int overlapstart = max (regstart, myregstart); |
| 822 | int overlapend = min (regend, myregend); |
| 823 | |
| 824 | /* We may be doing a partial update of an invalid register. |
| 825 | Update it from the target before scribbling on it. */ |
| 826 | deprecated_read_register_gen (regnum, regbuf); |
| 827 | |
| 828 | target_store_registers (regnum); |
| 829 | } |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | /* Perform a partial register transfer using a read, modify, write |
| 834 | operation. */ |
| 835 | |
| 836 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, |
| 837 | void *buf); |
| 838 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, |
| 839 | const void *buf); |
| 840 | |
| 841 | static void |
| 842 | regcache_xfer_part (struct regcache *regcache, int regnum, |
| 843 | int offset, int len, void *in, const void *out, |
| 844 | regcache_read_ftype *read, regcache_write_ftype *write) |
| 845 | { |
| 846 | struct regcache_descr *descr = regcache->descr; |
| 847 | bfd_byte reg[MAX_REGISTER_SIZE]; |
| 848 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
| 849 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); |
| 850 | /* Something to do? */ |
| 851 | if (offset + len == 0) |
| 852 | return; |
| 853 | /* Read (when needed) ... */ |
| 854 | if (in != NULL |
| 855 | || offset > 0 |
| 856 | || offset + len < descr->sizeof_register[regnum]) |
| 857 | { |
| 858 | gdb_assert (read != NULL); |
| 859 | read (regcache, regnum, reg); |
| 860 | } |
| 861 | /* ... modify ... */ |
| 862 | if (in != NULL) |
| 863 | memcpy (in, reg + offset, len); |
| 864 | if (out != NULL) |
| 865 | memcpy (reg + offset, out, len); |
| 866 | /* ... write (when needed). */ |
| 867 | if (out != NULL) |
| 868 | { |
| 869 | gdb_assert (write != NULL); |
| 870 | write (regcache, regnum, reg); |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | void |
| 875 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
| 876 | int offset, int len, void *buf) |
| 877 | { |
| 878 | struct regcache_descr *descr = regcache->descr; |
| 879 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 880 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 881 | regcache_raw_read, regcache_raw_write); |
| 882 | } |
| 883 | |
| 884 | void |
| 885 | regcache_raw_write_part (struct regcache *regcache, int regnum, |
| 886 | int offset, int len, const void *buf) |
| 887 | { |
| 888 | struct regcache_descr *descr = regcache->descr; |
| 889 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 890 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 891 | regcache_raw_read, regcache_raw_write); |
| 892 | } |
| 893 | |
| 894 | void |
| 895 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
| 896 | int offset, int len, void *buf) |
| 897 | { |
| 898 | struct regcache_descr *descr = regcache->descr; |
| 899 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 900 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 901 | regcache_cooked_read, regcache_cooked_write); |
| 902 | } |
| 903 | |
| 904 | void |
| 905 | regcache_cooked_write_part (struct regcache *regcache, int regnum, |
| 906 | int offset, int len, const void *buf) |
| 907 | { |
| 908 | struct regcache_descr *descr = regcache->descr; |
| 909 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 910 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 911 | regcache_cooked_read, regcache_cooked_write); |
| 912 | } |
| 913 | |
| 914 | /* Hack to keep code that view the register buffer as raw bytes |
| 915 | working. */ |
| 916 | |
| 917 | int |
| 918 | register_offset_hack (struct gdbarch *gdbarch, int regnum) |
| 919 | { |
| 920 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 921 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 922 | return descr->register_offset[regnum]; |
| 923 | } |
| 924 | |
| 925 | /* Hack to keep code using register_bytes working. */ |
| 926 | |
| 927 | int |
| 928 | deprecated_register_bytes (void) |
| 929 | { |
| 930 | return current_regcache->descr->sizeof_raw_registers; |
| 931 | } |
| 932 | |
| 933 | /* Return the contents of register REGNUM as an unsigned integer. */ |
| 934 | |
| 935 | ULONGEST |
| 936 | read_register (int regnum) |
| 937 | { |
| 938 | char *buf = alloca (register_size (current_gdbarch, regnum)); |
| 939 | deprecated_read_register_gen (regnum, buf); |
| 940 | return (extract_unsigned_integer (buf, register_size (current_gdbarch, regnum))); |
| 941 | } |
| 942 | |
| 943 | ULONGEST |
| 944 | read_register_pid (int regnum, ptid_t ptid) |
| 945 | { |
| 946 | ptid_t save_ptid; |
| 947 | int save_pid; |
| 948 | CORE_ADDR retval; |
| 949 | |
| 950 | if (ptid_equal (ptid, inferior_ptid)) |
| 951 | return read_register (regnum); |
| 952 | |
| 953 | save_ptid = inferior_ptid; |
| 954 | |
| 955 | inferior_ptid = ptid; |
| 956 | |
| 957 | retval = read_register (regnum); |
| 958 | |
| 959 | inferior_ptid = save_ptid; |
| 960 | |
| 961 | return retval; |
| 962 | } |
| 963 | |
| 964 | /* Store VALUE into the raw contents of register number REGNUM. */ |
| 965 | |
| 966 | void |
| 967 | write_register (int regnum, LONGEST val) |
| 968 | { |
| 969 | void *buf; |
| 970 | int size; |
| 971 | size = register_size (current_gdbarch, regnum); |
| 972 | buf = alloca (size); |
| 973 | store_signed_integer (buf, size, (LONGEST) val); |
| 974 | deprecated_write_register_gen (regnum, buf); |
| 975 | } |
| 976 | |
| 977 | void |
| 978 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
| 979 | { |
| 980 | ptid_t save_ptid; |
| 981 | |
| 982 | if (ptid_equal (ptid, inferior_ptid)) |
| 983 | { |
| 984 | write_register (regnum, val); |
| 985 | return; |
| 986 | } |
| 987 | |
| 988 | save_ptid = inferior_ptid; |
| 989 | |
| 990 | inferior_ptid = ptid; |
| 991 | |
| 992 | write_register (regnum, val); |
| 993 | |
| 994 | inferior_ptid = save_ptid; |
| 995 | } |
| 996 | |
| 997 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
| 998 | |
| 999 | void |
| 1000 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
| 1001 | { |
| 1002 | void *regbuf; |
| 1003 | size_t size; |
| 1004 | |
| 1005 | gdb_assert (regcache != NULL); |
| 1006 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 1007 | gdb_assert (!regcache->readonly_p); |
| 1008 | |
| 1009 | /* FIXME: kettenis/20030828: It shouldn't be necessary to handle |
| 1010 | CURRENT_REGCACHE specially here. */ |
| 1011 | if (regcache == current_regcache |
| 1012 | && !ptid_equal (registers_ptid, inferior_ptid)) |
| 1013 | { |
| 1014 | registers_changed (); |
| 1015 | registers_ptid = inferior_ptid; |
| 1016 | } |
| 1017 | |
| 1018 | regbuf = register_buffer (regcache, regnum); |
| 1019 | size = regcache->descr->sizeof_register[regnum]; |
| 1020 | |
| 1021 | if (buf) |
| 1022 | memcpy (regbuf, buf, size); |
| 1023 | else |
| 1024 | memset (regbuf, 0, size); |
| 1025 | |
| 1026 | /* Mark the register as cached. */ |
| 1027 | regcache->register_valid_p[regnum] = 1; |
| 1028 | } |
| 1029 | |
| 1030 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
| 1031 | |
| 1032 | void |
| 1033 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
| 1034 | { |
| 1035 | const void *regbuf; |
| 1036 | size_t size; |
| 1037 | |
| 1038 | gdb_assert (regcache != NULL && buf != NULL); |
| 1039 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 1040 | |
| 1041 | regbuf = register_buffer (regcache, regnum); |
| 1042 | size = regcache->descr->sizeof_register[regnum]; |
| 1043 | memcpy (buf, regbuf, size); |
| 1044 | } |
| 1045 | |
| 1046 | |
| 1047 | /* read_pc, write_pc, read_sp, etc. Special handling for registers |
| 1048 | PC, SP, and FP. */ |
| 1049 | |
| 1050 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc() and |
| 1051 | read_sp(), will eventually be replaced by per-frame methods. |
| 1052 | Instead of relying on the global INFERIOR_PTID, they will use the |
| 1053 | contextual information provided by the FRAME. These functions do |
| 1054 | not belong in the register cache. */ |
| 1055 | |
| 1056 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
| 1057 | write_pc_pid() and write_pc(), all need to be replaced by something |
| 1058 | that does not rely on global state. But what? */ |
| 1059 | |
| 1060 | CORE_ADDR |
| 1061 | read_pc_pid (ptid_t ptid) |
| 1062 | { |
| 1063 | ptid_t saved_inferior_ptid; |
| 1064 | CORE_ADDR pc_val; |
| 1065 | |
| 1066 | /* In case ptid != inferior_ptid. */ |
| 1067 | saved_inferior_ptid = inferior_ptid; |
| 1068 | inferior_ptid = ptid; |
| 1069 | |
| 1070 | if (TARGET_READ_PC_P ()) |
| 1071 | pc_val = TARGET_READ_PC (ptid); |
| 1072 | /* Else use per-frame method on get_current_frame. */ |
| 1073 | else if (PC_REGNUM >= 0) |
| 1074 | { |
| 1075 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); |
| 1076 | pc_val = ADDR_BITS_REMOVE (raw_val); |
| 1077 | } |
| 1078 | else |
| 1079 | internal_error (__FILE__, __LINE__, _("read_pc_pid: Unable to find PC")); |
| 1080 | |
| 1081 | inferior_ptid = saved_inferior_ptid; |
| 1082 | return pc_val; |
| 1083 | } |
| 1084 | |
| 1085 | CORE_ADDR |
| 1086 | read_pc (void) |
| 1087 | { |
| 1088 | return read_pc_pid (inferior_ptid); |
| 1089 | } |
| 1090 | |
| 1091 | void |
| 1092 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
| 1093 | { |
| 1094 | if (PC_REGNUM >= 0) |
| 1095 | write_register_pid (PC_REGNUM, pc, ptid); |
| 1096 | else |
| 1097 | internal_error (__FILE__, __LINE__, |
| 1098 | _("generic_target_write_pc")); |
| 1099 | } |
| 1100 | |
| 1101 | void |
| 1102 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
| 1103 | { |
| 1104 | ptid_t saved_inferior_ptid; |
| 1105 | |
| 1106 | /* In case ptid != inferior_ptid. */ |
| 1107 | saved_inferior_ptid = inferior_ptid; |
| 1108 | inferior_ptid = ptid; |
| 1109 | |
| 1110 | TARGET_WRITE_PC (pc, ptid); |
| 1111 | |
| 1112 | inferior_ptid = saved_inferior_ptid; |
| 1113 | } |
| 1114 | |
| 1115 | void |
| 1116 | write_pc (CORE_ADDR pc) |
| 1117 | { |
| 1118 | write_pc_pid (pc, inferior_ptid); |
| 1119 | } |
| 1120 | |
| 1121 | /* Cope with strage ways of getting to the stack and frame pointers */ |
| 1122 | |
| 1123 | CORE_ADDR |
| 1124 | read_sp (void) |
| 1125 | { |
| 1126 | if (TARGET_READ_SP_P ()) |
| 1127 | return TARGET_READ_SP (); |
| 1128 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
| 1129 | return get_frame_sp (get_current_frame ()); |
| 1130 | else if (SP_REGNUM >= 0) |
| 1131 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
| 1132 | about the architecture so put it at the end. */ |
| 1133 | return read_register (SP_REGNUM); |
| 1134 | internal_error (__FILE__, __LINE__, _("read_sp: Unable to find SP")); |
| 1135 | } |
| 1136 | |
| 1137 | static void |
| 1138 | reg_flush_command (char *command, int from_tty) |
| 1139 | { |
| 1140 | /* Force-flush the register cache. */ |
| 1141 | registers_changed (); |
| 1142 | if (from_tty) |
| 1143 | printf_filtered (_("Register cache flushed.\n")); |
| 1144 | } |
| 1145 | |
| 1146 | static void |
| 1147 | build_regcache (void) |
| 1148 | { |
| 1149 | current_regcache = regcache_xmalloc (current_gdbarch); |
| 1150 | current_regcache->readonly_p = 0; |
| 1151 | } |
| 1152 | |
| 1153 | static void |
| 1154 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, |
| 1155 | const unsigned char *buf, long len) |
| 1156 | { |
| 1157 | int i; |
| 1158 | switch (endian) |
| 1159 | { |
| 1160 | case BFD_ENDIAN_BIG: |
| 1161 | for (i = 0; i < len; i++) |
| 1162 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 1163 | break; |
| 1164 | case BFD_ENDIAN_LITTLE: |
| 1165 | for (i = len - 1; i >= 0; i--) |
| 1166 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 1167 | break; |
| 1168 | default: |
| 1169 | internal_error (__FILE__, __LINE__, _("Bad switch")); |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | enum regcache_dump_what |
| 1174 | { |
| 1175 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
| 1176 | }; |
| 1177 | |
| 1178 | static void |
| 1179 | regcache_dump (struct regcache *regcache, struct ui_file *file, |
| 1180 | enum regcache_dump_what what_to_dump) |
| 1181 | { |
| 1182 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 1183 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
| 1184 | int regnum; |
| 1185 | int footnote_nr = 0; |
| 1186 | int footnote_register_size = 0; |
| 1187 | int footnote_register_offset = 0; |
| 1188 | int footnote_register_type_name_null = 0; |
| 1189 | long register_offset = 0; |
| 1190 | unsigned char buf[MAX_REGISTER_SIZE]; |
| 1191 | |
| 1192 | #if 0 |
| 1193 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
| 1194 | regcache->descr->nr_raw_registers); |
| 1195 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", |
| 1196 | regcache->descr->nr_cooked_registers); |
| 1197 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", |
| 1198 | regcache->descr->sizeof_raw_registers); |
| 1199 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", |
| 1200 | regcache->descr->sizeof_raw_register_valid_p); |
| 1201 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
| 1202 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); |
| 1203 | #endif |
| 1204 | |
| 1205 | gdb_assert (regcache->descr->nr_cooked_registers |
| 1206 | == (NUM_REGS + NUM_PSEUDO_REGS)); |
| 1207 | |
| 1208 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) |
| 1209 | { |
| 1210 | /* Name. */ |
| 1211 | if (regnum < 0) |
| 1212 | fprintf_unfiltered (file, " %-10s", "Name"); |
| 1213 | else |
| 1214 | { |
| 1215 | const char *p = REGISTER_NAME (regnum); |
| 1216 | if (p == NULL) |
| 1217 | p = ""; |
| 1218 | else if (p[0] == '\0') |
| 1219 | p = "''"; |
| 1220 | fprintf_unfiltered (file, " %-10s", p); |
| 1221 | } |
| 1222 | |
| 1223 | /* Number. */ |
| 1224 | if (regnum < 0) |
| 1225 | fprintf_unfiltered (file, " %4s", "Nr"); |
| 1226 | else |
| 1227 | fprintf_unfiltered (file, " %4d", regnum); |
| 1228 | |
| 1229 | /* Relative number. */ |
| 1230 | if (regnum < 0) |
| 1231 | fprintf_unfiltered (file, " %4s", "Rel"); |
| 1232 | else if (regnum < NUM_REGS) |
| 1233 | fprintf_unfiltered (file, " %4d", regnum); |
| 1234 | else |
| 1235 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); |
| 1236 | |
| 1237 | /* Offset. */ |
| 1238 | if (regnum < 0) |
| 1239 | fprintf_unfiltered (file, " %6s ", "Offset"); |
| 1240 | else |
| 1241 | { |
| 1242 | fprintf_unfiltered (file, " %6ld", |
| 1243 | regcache->descr->register_offset[regnum]); |
| 1244 | if (register_offset != regcache->descr->register_offset[regnum] |
| 1245 | || register_offset != DEPRECATED_REGISTER_BYTE (regnum) |
| 1246 | || (regnum > 0 |
| 1247 | && (regcache->descr->register_offset[regnum] |
| 1248 | != (regcache->descr->register_offset[regnum - 1] |
| 1249 | + regcache->descr->sizeof_register[regnum - 1]))) |
| 1250 | ) |
| 1251 | { |
| 1252 | if (!footnote_register_offset) |
| 1253 | footnote_register_offset = ++footnote_nr; |
| 1254 | fprintf_unfiltered (file, "*%d", footnote_register_offset); |
| 1255 | } |
| 1256 | else |
| 1257 | fprintf_unfiltered (file, " "); |
| 1258 | register_offset = (regcache->descr->register_offset[regnum] |
| 1259 | + regcache->descr->sizeof_register[regnum]); |
| 1260 | } |
| 1261 | |
| 1262 | /* Size. */ |
| 1263 | if (regnum < 0) |
| 1264 | fprintf_unfiltered (file, " %5s ", "Size"); |
| 1265 | else |
| 1266 | fprintf_unfiltered (file, " %5ld", |
| 1267 | regcache->descr->sizeof_register[regnum]); |
| 1268 | |
| 1269 | /* Type. */ |
| 1270 | { |
| 1271 | const char *t; |
| 1272 | if (regnum < 0) |
| 1273 | t = "Type"; |
| 1274 | else |
| 1275 | { |
| 1276 | static const char blt[] = "builtin_type"; |
| 1277 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); |
| 1278 | if (t == NULL) |
| 1279 | { |
| 1280 | char *n; |
| 1281 | if (!footnote_register_type_name_null) |
| 1282 | footnote_register_type_name_null = ++footnote_nr; |
| 1283 | n = xstrprintf ("*%d", footnote_register_type_name_null); |
| 1284 | make_cleanup (xfree, n); |
| 1285 | t = n; |
| 1286 | } |
| 1287 | /* Chop a leading builtin_type. */ |
| 1288 | if (strncmp (t, blt, strlen (blt)) == 0) |
| 1289 | t += strlen (blt); |
| 1290 | } |
| 1291 | fprintf_unfiltered (file, " %-15s", t); |
| 1292 | } |
| 1293 | |
| 1294 | /* Leading space always present. */ |
| 1295 | fprintf_unfiltered (file, " "); |
| 1296 | |
| 1297 | /* Value, raw. */ |
| 1298 | if (what_to_dump == regcache_dump_raw) |
| 1299 | { |
| 1300 | if (regnum < 0) |
| 1301 | fprintf_unfiltered (file, "Raw value"); |
| 1302 | else if (regnum >= regcache->descr->nr_raw_registers) |
| 1303 | fprintf_unfiltered (file, "<cooked>"); |
| 1304 | else if (!regcache_valid_p (regcache, regnum)) |
| 1305 | fprintf_unfiltered (file, "<invalid>"); |
| 1306 | else |
| 1307 | { |
| 1308 | regcache_raw_read (regcache, regnum, buf); |
| 1309 | fprintf_unfiltered (file, "0x"); |
| 1310 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, |
| 1311 | regcache->descr->sizeof_register[regnum]); |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | /* Value, cooked. */ |
| 1316 | if (what_to_dump == regcache_dump_cooked) |
| 1317 | { |
| 1318 | if (regnum < 0) |
| 1319 | fprintf_unfiltered (file, "Cooked value"); |
| 1320 | else |
| 1321 | { |
| 1322 | regcache_cooked_read (regcache, regnum, buf); |
| 1323 | fprintf_unfiltered (file, "0x"); |
| 1324 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, |
| 1325 | regcache->descr->sizeof_register[regnum]); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | /* Group members. */ |
| 1330 | if (what_to_dump == regcache_dump_groups) |
| 1331 | { |
| 1332 | if (regnum < 0) |
| 1333 | fprintf_unfiltered (file, "Groups"); |
| 1334 | else |
| 1335 | { |
| 1336 | const char *sep = ""; |
| 1337 | struct reggroup *group; |
| 1338 | for (group = reggroup_next (gdbarch, NULL); |
| 1339 | group != NULL; |
| 1340 | group = reggroup_next (gdbarch, group)) |
| 1341 | { |
| 1342 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 1343 | { |
| 1344 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group)); |
| 1345 | sep = ","; |
| 1346 | } |
| 1347 | } |
| 1348 | } |
| 1349 | } |
| 1350 | |
| 1351 | fprintf_unfiltered (file, "\n"); |
| 1352 | } |
| 1353 | |
| 1354 | if (footnote_register_size) |
| 1355 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", |
| 1356 | footnote_register_size); |
| 1357 | if (footnote_register_offset) |
| 1358 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", |
| 1359 | footnote_register_offset); |
| 1360 | if (footnote_register_type_name_null) |
| 1361 | fprintf_unfiltered (file, |
| 1362 | "*%d: Register type's name NULL.\n", |
| 1363 | footnote_register_type_name_null); |
| 1364 | do_cleanups (cleanups); |
| 1365 | } |
| 1366 | |
| 1367 | static void |
| 1368 | regcache_print (char *args, enum regcache_dump_what what_to_dump) |
| 1369 | { |
| 1370 | if (args == NULL) |
| 1371 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); |
| 1372 | else |
| 1373 | { |
| 1374 | struct ui_file *file = gdb_fopen (args, "w"); |
| 1375 | if (file == NULL) |
| 1376 | perror_with_name (_("maintenance print architecture")); |
| 1377 | regcache_dump (current_regcache, file, what_to_dump); |
| 1378 | ui_file_delete (file); |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | static void |
| 1383 | maintenance_print_registers (char *args, int from_tty) |
| 1384 | { |
| 1385 | regcache_print (args, regcache_dump_none); |
| 1386 | } |
| 1387 | |
| 1388 | static void |
| 1389 | maintenance_print_raw_registers (char *args, int from_tty) |
| 1390 | { |
| 1391 | regcache_print (args, regcache_dump_raw); |
| 1392 | } |
| 1393 | |
| 1394 | static void |
| 1395 | maintenance_print_cooked_registers (char *args, int from_tty) |
| 1396 | { |
| 1397 | regcache_print (args, regcache_dump_cooked); |
| 1398 | } |
| 1399 | |
| 1400 | static void |
| 1401 | maintenance_print_register_groups (char *args, int from_tty) |
| 1402 | { |
| 1403 | regcache_print (args, regcache_dump_groups); |
| 1404 | } |
| 1405 | |
| 1406 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
| 1407 | |
| 1408 | void |
| 1409 | _initialize_regcache (void) |
| 1410 | { |
| 1411 | regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr); |
| 1412 | DEPRECATED_REGISTER_GDBARCH_SWAP (current_regcache); |
| 1413 | deprecated_register_gdbarch_swap (NULL, 0, build_regcache); |
| 1414 | |
| 1415 | observer_attach_target_changed (regcache_observer_target_changed); |
| 1416 | |
| 1417 | add_com ("flushregs", class_maintenance, reg_flush_command, |
| 1418 | _("Force gdb to flush its register cache (maintainer command)")); |
| 1419 | |
| 1420 | /* Initialize the thread/process associated with the current set of |
| 1421 | registers. For now, -1 is special, and means `no current process'. */ |
| 1422 | registers_ptid = pid_to_ptid (-1); |
| 1423 | |
| 1424 | add_cmd ("registers", class_maintenance, maintenance_print_registers, _("\ |
| 1425 | Print the internal register configuration.\n\ |
| 1426 | Takes an optional file parameter."), &maintenanceprintlist); |
| 1427 | add_cmd ("raw-registers", class_maintenance, |
| 1428 | maintenance_print_raw_registers, _("\ |
| 1429 | Print the internal register configuration including raw values.\n\ |
| 1430 | Takes an optional file parameter."), &maintenanceprintlist); |
| 1431 | add_cmd ("cooked-registers", class_maintenance, |
| 1432 | maintenance_print_cooked_registers, _("\ |
| 1433 | Print the internal register configuration including cooked values.\n\ |
| 1434 | Takes an optional file parameter."), &maintenanceprintlist); |
| 1435 | add_cmd ("register-groups", class_maintenance, |
| 1436 | maintenance_print_register_groups, _("\ |
| 1437 | Print the internal register configuration including each register's group.\n\ |
| 1438 | Takes an optional file parameter."), |
| 1439 | &maintenanceprintlist); |
| 1440 | |
| 1441 | } |