| 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 | /* Is this a ``legacy'' register cache? Such caches reserve space |
| 52 | for raw and pseudo registers and allow access to both. */ |
| 53 | int legacy_p; |
| 54 | |
| 55 | /* The raw register cache. Each raw (or hard) register is supplied |
| 56 | by the target interface. The raw cache should not contain |
| 57 | redundant information - if the PC is constructed from two |
| 58 | registers then those regigisters and not the PC lives in the raw |
| 59 | cache. */ |
| 60 | int nr_raw_registers; |
| 61 | long sizeof_raw_registers; |
| 62 | long sizeof_raw_register_valid_p; |
| 63 | |
| 64 | /* The cooked register space. Each cooked register in the range |
| 65 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw |
| 66 | register. The remaining [NR_RAW_REGISTERS |
| 67 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
| 68 | both raw registers and memory by the architecture methods |
| 69 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
| 70 | int nr_cooked_registers; |
| 71 | long sizeof_cooked_registers; |
| 72 | long sizeof_cooked_register_valid_p; |
| 73 | |
| 74 | /* Offset and size (in 8 bit bytes), of reach register in the |
| 75 | register cache. All registers (including those in the range |
| 76 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. |
| 77 | Assigning all registers an offset makes it possible to keep |
| 78 | legacy code, such as that found in read_register_bytes() and |
| 79 | write_register_bytes() working. */ |
| 80 | long *register_offset; |
| 81 | long *sizeof_register; |
| 82 | |
| 83 | /* Cached table containing the type of each register. */ |
| 84 | struct type **register_type; |
| 85 | }; |
| 86 | |
| 87 | static void |
| 88 | init_legacy_regcache_descr (struct gdbarch *gdbarch, |
| 89 | struct regcache_descr *descr) |
| 90 | { |
| 91 | int i; |
| 92 | /* FIXME: cagney/2002-05-11: gdbarch_data() should take that |
| 93 | ``gdbarch'' as a parameter. */ |
| 94 | gdb_assert (gdbarch != NULL); |
| 95 | |
| 96 | /* Compute the offset of each register. Legacy architectures define |
| 97 | DEPRECATED_REGISTER_BYTE() so use that. */ |
| 98 | /* FIXME: cagney/2002-11-07: Instead of using |
| 99 | DEPRECATED_REGISTER_BYTE() this code should, as is done in |
| 100 | init_regcache_descr(), compute the offets at runtime. This |
| 101 | currently isn't possible as some ISAs define overlapping register |
| 102 | regions - see the mess in read_register_bytes() and |
| 103 | write_register_bytes() registers. */ |
| 104 | descr->sizeof_register |
| 105 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 106 | descr->register_offset |
| 107 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 108 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 109 | { |
| 110 | /* FIXME: cagney/2001-12-04: This code shouldn't need to use |
| 111 | DEPRECATED_REGISTER_BYTE(). Unfortunately, legacy code likes |
| 112 | to lay the buffer out so that certain registers just happen |
| 113 | to overlap. Ulgh! New targets use gdbarch's register |
| 114 | read/write and entirely avoid this uglyness. */ |
| 115 | descr->register_offset[i] = DEPRECATED_REGISTER_BYTE (i); |
| 116 | descr->sizeof_register[i] = DEPRECATED_REGISTER_RAW_SIZE (i); |
| 117 | gdb_assert (MAX_REGISTER_SIZE >= DEPRECATED_REGISTER_RAW_SIZE (i)); |
| 118 | gdb_assert (MAX_REGISTER_SIZE >= DEPRECATED_REGISTER_VIRTUAL_SIZE (i)); |
| 119 | } |
| 120 | |
| 121 | /* Compute the real size of the register buffer. Start out by |
| 122 | trusting DEPRECATED_REGISTER_BYTES, but then adjust it upwards |
| 123 | should that be found to not be sufficient. */ |
| 124 | /* FIXME: cagney/2002-11-05: Instead of using the macro |
| 125 | DEPRECATED_REGISTER_BYTES, this code should, as is done in |
| 126 | init_regcache_descr(), compute the total number of register bytes |
| 127 | using the accumulated offsets. */ |
| 128 | descr->sizeof_cooked_registers = DEPRECATED_REGISTER_BYTES; /* OK */ |
| 129 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 130 | { |
| 131 | long regend; |
| 132 | /* Keep extending the buffer so that there is always enough |
| 133 | space for all registers. The comparison is necessary since |
| 134 | legacy code is free to put registers in random places in the |
| 135 | buffer separated by holes. Once DEPRECATED_REGISTER_BYTE() |
| 136 | is killed this can be greatly simplified. */ |
| 137 | regend = descr->register_offset[i] + descr->sizeof_register[i]; |
| 138 | if (descr->sizeof_cooked_registers < regend) |
| 139 | descr->sizeof_cooked_registers = regend; |
| 140 | } |
| 141 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
| 142 | in the register cache. Unfortunately some architectures still |
| 143 | rely on this and the pseudo_register_write() method. */ |
| 144 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; |
| 145 | } |
| 146 | |
| 147 | static void * |
| 148 | init_regcache_descr (struct gdbarch *gdbarch) |
| 149 | { |
| 150 | int i; |
| 151 | struct regcache_descr *descr; |
| 152 | gdb_assert (gdbarch != NULL); |
| 153 | |
| 154 | /* Create an initial, zero filled, table. */ |
| 155 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
| 156 | descr->gdbarch = gdbarch; |
| 157 | |
| 158 | /* Total size of the register space. The raw registers are mapped |
| 159 | directly onto the raw register cache while the pseudo's are |
| 160 | either mapped onto raw-registers or memory. */ |
| 161 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
| 162 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
| 163 | |
| 164 | /* Fill in a table of register types. */ |
| 165 | descr->register_type |
| 166 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *); |
| 167 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 168 | { |
| 169 | if (gdbarch_register_type_p (gdbarch)) |
| 170 | { |
| 171 | gdb_assert (!DEPRECATED_REGISTER_VIRTUAL_TYPE_P ()); /* OK */ |
| 172 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
| 173 | } |
| 174 | else |
| 175 | descr->register_type[i] = DEPRECATED_REGISTER_VIRTUAL_TYPE (i); /* OK */ |
| 176 | } |
| 177 | |
| 178 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
| 179 | into the register cache. */ |
| 180 | descr->nr_raw_registers = NUM_REGS; |
| 181 | |
| 182 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p |
| 183 | array. This pretects GDB from erant code that accesses elements |
| 184 | of the global register_valid_p[] array in the range [NUM_REGS |
| 185 | .. NUM_REGS + NUM_PSEUDO_REGS). */ |
| 186 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
| 187 | |
| 188 | /* If an old style architecture, fill in the remainder of the |
| 189 | register cache descriptor using the register macros. */ |
| 190 | /* NOTE: cagney/2003-06-29: If either of DEPRECATED_REGISTER_BYTE or |
| 191 | DEPRECATED_REGISTER_RAW_SIZE are still present, things are most likely |
| 192 | totally screwed. Ex: an architecture with raw register sizes |
| 193 | smaller than what DEPRECATED_REGISTER_BYTE indicates; non |
| 194 | monotonic DEPRECATED_REGISTER_BYTE values. For GDB 6 check for |
| 195 | these nasty methods and fall back to legacy code when present. |
| 196 | Sigh! */ |
| 197 | if ((!gdbarch_pseudo_register_read_p (gdbarch) |
| 198 | && !gdbarch_pseudo_register_write_p (gdbarch) |
| 199 | && !gdbarch_register_type_p (gdbarch)) |
| 200 | || DEPRECATED_REGISTER_BYTE_P () |
| 201 | || DEPRECATED_REGISTER_RAW_SIZE_P ()) |
| 202 | { |
| 203 | descr->legacy_p = 1; |
| 204 | init_legacy_regcache_descr (gdbarch, descr); |
| 205 | return descr; |
| 206 | } |
| 207 | |
| 208 | /* Lay out the register cache. |
| 209 | |
| 210 | NOTE: cagney/2002-05-22: Only register_type() is used when |
| 211 | constructing the register cache. It is assumed that the |
| 212 | register's raw size, virtual size and type length are all the |
| 213 | same. */ |
| 214 | |
| 215 | { |
| 216 | long offset = 0; |
| 217 | descr->sizeof_register |
| 218 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 219 | descr->register_offset |
| 220 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 221 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 222 | { |
| 223 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
| 224 | descr->register_offset[i] = offset; |
| 225 | offset += descr->sizeof_register[i]; |
| 226 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
| 227 | } |
| 228 | /* Set the real size of the register cache buffer. */ |
| 229 | descr->sizeof_cooked_registers = offset; |
| 230 | } |
| 231 | |
| 232 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
| 233 | the raw registers. Unfortunately some code still accesses the |
| 234 | register array directly using the global registers[]. Until that |
| 235 | code has been purged, play safe and over allocating the register |
| 236 | buffer. Ulgh! */ |
| 237 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; |
| 238 | |
| 239 | /* Sanity check. Confirm that there is agreement between the |
| 240 | regcache and the target's redundant DEPRECATED_REGISTER_BYTE (new |
| 241 | targets should not even be defining it). */ |
| 242 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 243 | { |
| 244 | if (DEPRECATED_REGISTER_BYTE_P ()) |
| 245 | gdb_assert (descr->register_offset[i] == DEPRECATED_REGISTER_BYTE (i)); |
| 246 | #if 0 |
| 247 | gdb_assert (descr->sizeof_register[i] == DEPRECATED_REGISTER_RAW_SIZE (i)); |
| 248 | gdb_assert (descr->sizeof_register[i] == DEPRECATED_REGISTER_VIRTUAL_SIZE (i)); |
| 249 | #endif |
| 250 | } |
| 251 | /* gdb_assert (descr->sizeof_raw_registers == DEPRECATED_REGISTER_BYTES (i)); */ |
| 252 | |
| 253 | return descr; |
| 254 | } |
| 255 | |
| 256 | static struct regcache_descr * |
| 257 | regcache_descr (struct gdbarch *gdbarch) |
| 258 | { |
| 259 | return gdbarch_data (gdbarch, regcache_descr_handle); |
| 260 | } |
| 261 | |
| 262 | /* Utility functions returning useful register attributes stored in |
| 263 | the regcache descr. */ |
| 264 | |
| 265 | struct type * |
| 266 | register_type (struct gdbarch *gdbarch, int regnum) |
| 267 | { |
| 268 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 269 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 270 | return descr->register_type[regnum]; |
| 271 | } |
| 272 | |
| 273 | /* Utility functions returning useful register attributes stored in |
| 274 | the regcache descr. */ |
| 275 | |
| 276 | int |
| 277 | register_size (struct gdbarch *gdbarch, int regnum) |
| 278 | { |
| 279 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 280 | int size; |
| 281 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 282 | size = descr->sizeof_register[regnum]; |
| 283 | /* NB: The deprecated DEPRECATED_REGISTER_RAW_SIZE, if not provided, defaults |
| 284 | to the size of the register's type. */ |
| 285 | gdb_assert (size == DEPRECATED_REGISTER_RAW_SIZE (regnum)); /* OK */ |
| 286 | /* NB: Don't check the register's virtual size. It, in say the case |
| 287 | of the MIPS, may not match the raw size! */ |
| 288 | return size; |
| 289 | } |
| 290 | |
| 291 | /* The register cache for storing raw register values. */ |
| 292 | |
| 293 | struct regcache |
| 294 | { |
| 295 | struct regcache_descr *descr; |
| 296 | /* The register buffers. A read-only register cache can hold the |
| 297 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write |
| 298 | register cache can only hold [0 .. NUM_REGS). */ |
| 299 | char *registers; |
| 300 | char *register_valid_p; |
| 301 | /* Is this a read-only cache? A read-only cache is used for saving |
| 302 | the target's register state (e.g, across an inferior function |
| 303 | call or just before forcing a function return). A read-only |
| 304 | cache can only be updated via the methods regcache_dup() and |
| 305 | regcache_cpy(). The actual contents are determined by the |
| 306 | reggroup_save and reggroup_restore methods. */ |
| 307 | int readonly_p; |
| 308 | }; |
| 309 | |
| 310 | struct regcache * |
| 311 | regcache_xmalloc (struct gdbarch *gdbarch) |
| 312 | { |
| 313 | struct regcache_descr *descr; |
| 314 | struct regcache *regcache; |
| 315 | gdb_assert (gdbarch != NULL); |
| 316 | descr = regcache_descr (gdbarch); |
| 317 | regcache = XMALLOC (struct regcache); |
| 318 | regcache->descr = descr; |
| 319 | regcache->registers |
| 320 | = XCALLOC (descr->sizeof_raw_registers, char); |
| 321 | regcache->register_valid_p |
| 322 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
| 323 | regcache->readonly_p = 1; |
| 324 | return regcache; |
| 325 | } |
| 326 | |
| 327 | void |
| 328 | regcache_xfree (struct regcache *regcache) |
| 329 | { |
| 330 | if (regcache == NULL) |
| 331 | return; |
| 332 | xfree (regcache->registers); |
| 333 | xfree (regcache->register_valid_p); |
| 334 | xfree (regcache); |
| 335 | } |
| 336 | |
| 337 | static void |
| 338 | do_regcache_xfree (void *data) |
| 339 | { |
| 340 | regcache_xfree (data); |
| 341 | } |
| 342 | |
| 343 | struct cleanup * |
| 344 | make_cleanup_regcache_xfree (struct regcache *regcache) |
| 345 | { |
| 346 | return make_cleanup (do_regcache_xfree, regcache); |
| 347 | } |
| 348 | |
| 349 | /* Return REGCACHE's architecture. */ |
| 350 | |
| 351 | struct gdbarch * |
| 352 | get_regcache_arch (const struct regcache *regcache) |
| 353 | { |
| 354 | return regcache->descr->gdbarch; |
| 355 | } |
| 356 | |
| 357 | /* Return a pointer to register REGNUM's buffer cache. */ |
| 358 | |
| 359 | static char * |
| 360 | register_buffer (const struct regcache *regcache, int regnum) |
| 361 | { |
| 362 | return regcache->registers + regcache->descr->register_offset[regnum]; |
| 363 | } |
| 364 | |
| 365 | void |
| 366 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
| 367 | void *src) |
| 368 | { |
| 369 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 370 | char buf[MAX_REGISTER_SIZE]; |
| 371 | int regnum; |
| 372 | /* The DST should be `read-only', if it wasn't then the save would |
| 373 | end up trying to write the register values back out to the |
| 374 | target. */ |
| 375 | gdb_assert (dst->readonly_p); |
| 376 | /* Clear the dest. */ |
| 377 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); |
| 378 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); |
| 379 | /* Copy over any registers (identified by their membership in the |
| 380 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
| 381 | NUM_PSEUDO_REGS) range is checked since some architectures need |
| 382 | to save/restore `cooked' registers that live in memory. */ |
| 383 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 384 | { |
| 385 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) |
| 386 | { |
| 387 | int valid = cooked_read (src, regnum, buf); |
| 388 | if (valid) |
| 389 | { |
| 390 | memcpy (register_buffer (dst, regnum), buf, |
| 391 | register_size (gdbarch, regnum)); |
| 392 | dst->register_valid_p[regnum] = 1; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | void |
| 399 | regcache_restore (struct regcache *dst, |
| 400 | regcache_cooked_read_ftype *cooked_read, |
| 401 | void *src) |
| 402 | { |
| 403 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 404 | char buf[MAX_REGISTER_SIZE]; |
| 405 | int regnum; |
| 406 | /* The dst had better not be read-only. If it is, the `restore' |
| 407 | doesn't make much sense. */ |
| 408 | gdb_assert (!dst->readonly_p); |
| 409 | /* Copy over any registers, being careful to only restore those that |
| 410 | were both saved and need to be restored. The full [0 .. NUM_REGS |
| 411 | + NUM_PSEUDO_REGS) range is checked since some architectures need |
| 412 | to save/restore `cooked' registers that live in memory. */ |
| 413 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 414 | { |
| 415 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
| 416 | { |
| 417 | int valid = cooked_read (src, regnum, buf); |
| 418 | if (valid) |
| 419 | regcache_cooked_write (dst, regnum, buf); |
| 420 | } |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | static int |
| 425 | do_cooked_read (void *src, int regnum, void *buf) |
| 426 | { |
| 427 | struct regcache *regcache = src; |
| 428 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
| 429 | /* Don't even think about fetching a register from a read-only |
| 430 | cache when the register isn't yet valid. There isn't a target |
| 431 | from which the register value can be fetched. */ |
| 432 | return 0; |
| 433 | regcache_cooked_read (regcache, regnum, buf); |
| 434 | return 1; |
| 435 | } |
| 436 | |
| 437 | |
| 438 | void |
| 439 | regcache_cpy (struct regcache *dst, struct regcache *src) |
| 440 | { |
| 441 | int i; |
| 442 | char *buf; |
| 443 | gdb_assert (src != NULL && dst != NULL); |
| 444 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 445 | gdb_assert (src != dst); |
| 446 | gdb_assert (src->readonly_p || dst->readonly_p); |
| 447 | if (!src->readonly_p) |
| 448 | regcache_save (dst, do_cooked_read, src); |
| 449 | else if (!dst->readonly_p) |
| 450 | regcache_restore (dst, do_cooked_read, src); |
| 451 | else |
| 452 | regcache_cpy_no_passthrough (dst, src); |
| 453 | } |
| 454 | |
| 455 | void |
| 456 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) |
| 457 | { |
| 458 | int i; |
| 459 | gdb_assert (src != NULL && dst != NULL); |
| 460 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 461 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough |
| 462 | move of data into the current_regcache(). Doing this would be |
| 463 | silly - it would mean that valid_p would be completely invalid. */ |
| 464 | gdb_assert (dst != current_regcache); |
| 465 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
| 466 | memcpy (dst->register_valid_p, src->register_valid_p, |
| 467 | dst->descr->sizeof_raw_register_valid_p); |
| 468 | } |
| 469 | |
| 470 | struct regcache * |
| 471 | regcache_dup (struct regcache *src) |
| 472 | { |
| 473 | struct regcache *newbuf; |
| 474 | gdb_assert (current_regcache != NULL); |
| 475 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 476 | regcache_cpy (newbuf, src); |
| 477 | return newbuf; |
| 478 | } |
| 479 | |
| 480 | struct regcache * |
| 481 | regcache_dup_no_passthrough (struct regcache *src) |
| 482 | { |
| 483 | struct regcache *newbuf; |
| 484 | gdb_assert (current_regcache != NULL); |
| 485 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 486 | regcache_cpy_no_passthrough (newbuf, src); |
| 487 | return newbuf; |
| 488 | } |
| 489 | |
| 490 | int |
| 491 | regcache_valid_p (struct regcache *regcache, int regnum) |
| 492 | { |
| 493 | gdb_assert (regcache != NULL); |
| 494 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 495 | return regcache->register_valid_p[regnum]; |
| 496 | } |
| 497 | |
| 498 | char * |
| 499 | deprecated_grub_regcache_for_registers (struct regcache *regcache) |
| 500 | { |
| 501 | return regcache->registers; |
| 502 | } |
| 503 | |
| 504 | /* Global structure containing the current regcache. */ |
| 505 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and |
| 506 | deprecated_register_valid[] currently point into this structure. */ |
| 507 | struct regcache *current_regcache; |
| 508 | |
| 509 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
| 510 | recording if the register values have been changed (eg. by the |
| 511 | user). Therefore all registers must be written back to the |
| 512 | target when appropriate. */ |
| 513 | |
| 514 | /* REGISTERS contains the cached register values (in target byte order). */ |
| 515 | |
| 516 | char *deprecated_registers; |
| 517 | |
| 518 | /* DEPRECATED_REGISTER_VALID is 0 if the register needs to be fetched, |
| 519 | 1 if it has been fetched, and |
| 520 | -1 if the register value was not available. |
| 521 | |
| 522 | "Not available" indicates that the target is not not able to supply |
| 523 | the register at this state. The register may become available at a |
| 524 | later time (after the next resume). This often occures when GDB is |
| 525 | manipulating a target that contains only a snapshot of the entire |
| 526 | system being debugged - some of the registers in such a system may |
| 527 | not have been saved. */ |
| 528 | |
| 529 | signed char *deprecated_register_valid; |
| 530 | |
| 531 | /* The thread/process associated with the current set of registers. */ |
| 532 | |
| 533 | static ptid_t registers_ptid; |
| 534 | |
| 535 | /* |
| 536 | * FUNCTIONS: |
| 537 | */ |
| 538 | |
| 539 | /* REGISTER_CACHED() |
| 540 | |
| 541 | Returns 0 if the value is not in the cache (needs fetch). |
| 542 | >0 if the value is in the cache. |
| 543 | <0 if the value is permanently unavailable (don't ask again). */ |
| 544 | |
| 545 | int |
| 546 | register_cached (int regnum) |
| 547 | { |
| 548 | return deprecated_register_valid[regnum]; |
| 549 | } |
| 550 | |
| 551 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
| 552 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ |
| 553 | |
| 554 | void |
| 555 | set_register_cached (int regnum, int state) |
| 556 | { |
| 557 | gdb_assert (regnum >= 0); |
| 558 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); |
| 559 | current_regcache->register_valid_p[regnum] = state; |
| 560 | } |
| 561 | |
| 562 | /* Return whether register REGNUM is a real register. */ |
| 563 | |
| 564 | static int |
| 565 | real_register (int regnum) |
| 566 | { |
| 567 | return regnum >= 0 && regnum < NUM_REGS; |
| 568 | } |
| 569 | |
| 570 | /* Observer for the target_changed event. */ |
| 571 | |
| 572 | void |
| 573 | regcache_observer_target_changed (struct target_ops *target) |
| 574 | { |
| 575 | registers_changed (); |
| 576 | } |
| 577 | |
| 578 | /* Low level examining and depositing of registers. |
| 579 | |
| 580 | The caller is responsible for making sure that the inferior is |
| 581 | stopped before calling the fetching routines, or it will get |
| 582 | garbage. (a change from GDB version 3, in which the caller got the |
| 583 | value from the last stop). */ |
| 584 | |
| 585 | /* REGISTERS_CHANGED () |
| 586 | |
| 587 | Indicate that registers may have changed, so invalidate the cache. */ |
| 588 | |
| 589 | void |
| 590 | registers_changed (void) |
| 591 | { |
| 592 | int i; |
| 593 | |
| 594 | registers_ptid = pid_to_ptid (-1); |
| 595 | |
| 596 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 597 | a builtin alloca. This particular call is used to clean up |
| 598 | areas allocated by low level target code which may build up |
| 599 | during lengthy interactions between gdb and the target before |
| 600 | gdb gives control to the user (ie watchpoints). */ |
| 601 | alloca (0); |
| 602 | |
| 603 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
| 604 | set_register_cached (i, 0); |
| 605 | |
| 606 | if (deprecated_registers_changed_hook) |
| 607 | deprecated_registers_changed_hook (); |
| 608 | } |
| 609 | |
| 610 | /* DEPRECATED_REGISTERS_FETCHED () |
| 611 | |
| 612 | Indicate that all registers have been fetched, so mark them all valid. */ |
| 613 | |
| 614 | /* NOTE: cagney/2001-12-04: This function does not set valid on the |
| 615 | pseudo-register range since pseudo registers are always supplied |
| 616 | using supply_register(). */ |
| 617 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target |
| 618 | code was blatting the registers[] array and then calling this. |
| 619 | Since targets should only be using supply_register() the need for |
| 620 | this function/hack is eliminated. */ |
| 621 | |
| 622 | void |
| 623 | deprecated_registers_fetched (void) |
| 624 | { |
| 625 | int i; |
| 626 | |
| 627 | for (i = 0; i < NUM_REGS; i++) |
| 628 | set_register_cached (i, 1); |
| 629 | /* Do not assume that the pseudo-regs have also been fetched. |
| 630 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
| 631 | } |
| 632 | |
| 633 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
| 634 | are generally a *BAD* idea. They are inefficient because they need |
| 635 | to check for partial updates, which can only be done by scanning |
| 636 | through all of the registers and seeing if the bytes that are being |
| 637 | read/written fall inside of an invalid register. [The main reason |
| 638 | this is necessary is that register sizes can vary, so a simple |
| 639 | index won't suffice.] It is far better to call read_register_gen |
| 640 | and write_register_gen if you want to get at the raw register |
| 641 | contents, as it only takes a regnum as an argument, and therefore |
| 642 | can't do a partial register update. |
| 643 | |
| 644 | Prior to the recent fixes to check for partial updates, both read |
| 645 | and deprecated_write_register_bytes always checked to see if any |
| 646 | registers were stale, and then called target_fetch_registers (-1) |
| 647 | to update the whole set. This caused really slowed things down for |
| 648 | remote targets. */ |
| 649 | |
| 650 | /* Copy INLEN bytes of consecutive data from registers |
| 651 | starting with the INREGBYTE'th byte of register data |
| 652 | into memory at MYADDR. */ |
| 653 | |
| 654 | void |
| 655 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
| 656 | { |
| 657 | int in_end = in_start + in_len; |
| 658 | int regnum; |
| 659 | char reg_buf[MAX_REGISTER_SIZE]; |
| 660 | |
| 661 | /* See if we are trying to read bytes from out-of-date registers. If so, |
| 662 | update just those registers. */ |
| 663 | |
| 664 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| 665 | { |
| 666 | int reg_start; |
| 667 | int reg_end; |
| 668 | int reg_len; |
| 669 | int start; |
| 670 | int end; |
| 671 | int byte; |
| 672 | |
| 673 | reg_start = DEPRECATED_REGISTER_BYTE (regnum); |
| 674 | reg_len = DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 675 | reg_end = reg_start + reg_len; |
| 676 | |
| 677 | if (reg_end <= in_start || in_end <= reg_start) |
| 678 | /* The range the user wants to read doesn't overlap with regnum. */ |
| 679 | continue; |
| 680 | |
| 681 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
| 682 | /* Force the cache to fetch the entire register. */ |
| 683 | deprecated_read_register_gen (regnum, reg_buf); |
| 684 | else |
| 685 | /* Legacy note: even though this register is ``invalid'' we |
| 686 | still need to return something. It would appear that some |
| 687 | code relies on apparent gaps in the register array also |
| 688 | being returned. */ |
| 689 | /* FIXME: cagney/2001-08-18: This is just silly. It defeats |
| 690 | the entire register read/write flow of control. Must |
| 691 | resist temptation to return 0xdeadbeef. */ |
| 692 | memcpy (reg_buf, &deprecated_registers[reg_start], reg_len); |
| 693 | |
| 694 | /* Legacy note: This function, for some reason, allows a NULL |
| 695 | input buffer. If the buffer is NULL, the registers are still |
| 696 | fetched, just the final transfer is skipped. */ |
| 697 | if (in_buf == NULL) |
| 698 | continue; |
| 699 | |
| 700 | /* start = max (reg_start, in_start) */ |
| 701 | if (reg_start > in_start) |
| 702 | start = reg_start; |
| 703 | else |
| 704 | start = in_start; |
| 705 | |
| 706 | /* end = min (reg_end, in_end) */ |
| 707 | if (reg_end < in_end) |
| 708 | end = reg_end; |
| 709 | else |
| 710 | end = in_end; |
| 711 | |
| 712 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ |
| 713 | for (byte = start; byte < end; byte++) |
| 714 | { |
| 715 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
| 716 | } |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | /* Read register REGNUM into memory at MYADDR, which must be large |
| 721 | enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the |
| 722 | register is known to be the size of a CORE_ADDR or smaller, |
| 723 | read_register can be used instead. */ |
| 724 | |
| 725 | static void |
| 726 | legacy_read_register_gen (int regnum, char *myaddr) |
| 727 | { |
| 728 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 729 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 730 | { |
| 731 | registers_changed (); |
| 732 | registers_ptid = inferior_ptid; |
| 733 | } |
| 734 | |
| 735 | if (!register_cached (regnum)) |
| 736 | target_fetch_registers (regnum); |
| 737 | |
| 738 | memcpy (myaddr, register_buffer (current_regcache, regnum), |
| 739 | DEPRECATED_REGISTER_RAW_SIZE (regnum)); |
| 740 | } |
| 741 | |
| 742 | void |
| 743 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
| 744 | { |
| 745 | gdb_assert (regcache != NULL && buf != NULL); |
| 746 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 747 | if (regcache->descr->legacy_p |
| 748 | && !regcache->readonly_p) |
| 749 | { |
| 750 | gdb_assert (regcache == current_regcache); |
| 751 | /* For moment, just use underlying legacy code. Ulgh!!! This |
| 752 | silently and very indirectly updates the regcache's regcache |
| 753 | via the global deprecated_register_valid[]. */ |
| 754 | legacy_read_register_gen (regnum, buf); |
| 755 | return; |
| 756 | } |
| 757 | /* Make certain that the register cache is up-to-date with respect |
| 758 | to the current thread. This switching shouldn't be necessary |
| 759 | only there is still only one target side register cache. Sigh! |
| 760 | On the bright side, at least there is a regcache object. */ |
| 761 | if (!regcache->readonly_p) |
| 762 | { |
| 763 | gdb_assert (regcache == current_regcache); |
| 764 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 765 | { |
| 766 | registers_changed (); |
| 767 | registers_ptid = inferior_ptid; |
| 768 | } |
| 769 | if (!register_cached (regnum)) |
| 770 | target_fetch_registers (regnum); |
| 771 | } |
| 772 | /* Copy the value directly into the register cache. */ |
| 773 | memcpy (buf, register_buffer (regcache, regnum), |
| 774 | regcache->descr->sizeof_register[regnum]); |
| 775 | } |
| 776 | |
| 777 | void |
| 778 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
| 779 | { |
| 780 | char *buf; |
| 781 | gdb_assert (regcache != NULL); |
| 782 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 783 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 784 | regcache_raw_read (regcache, regnum, buf); |
| 785 | (*val) = extract_signed_integer (buf, |
| 786 | regcache->descr->sizeof_register[regnum]); |
| 787 | } |
| 788 | |
| 789 | void |
| 790 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
| 791 | ULONGEST *val) |
| 792 | { |
| 793 | char *buf; |
| 794 | gdb_assert (regcache != NULL); |
| 795 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 796 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 797 | regcache_raw_read (regcache, regnum, buf); |
| 798 | (*val) = extract_unsigned_integer (buf, |
| 799 | regcache->descr->sizeof_register[regnum]); |
| 800 | } |
| 801 | |
| 802 | void |
| 803 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) |
| 804 | { |
| 805 | void *buf; |
| 806 | gdb_assert (regcache != NULL); |
| 807 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 808 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 809 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 810 | regcache_raw_write (regcache, regnum, buf); |
| 811 | } |
| 812 | |
| 813 | void |
| 814 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, |
| 815 | ULONGEST val) |
| 816 | { |
| 817 | void *buf; |
| 818 | gdb_assert (regcache != NULL); |
| 819 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 820 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 821 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 822 | regcache_raw_write (regcache, regnum, buf); |
| 823 | } |
| 824 | |
| 825 | void |
| 826 | deprecated_read_register_gen (int regnum, char *buf) |
| 827 | { |
| 828 | gdb_assert (current_regcache != NULL); |
| 829 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); |
| 830 | if (current_regcache->descr->legacy_p) |
| 831 | { |
| 832 | legacy_read_register_gen (regnum, buf); |
| 833 | return; |
| 834 | } |
| 835 | regcache_cooked_read (current_regcache, regnum, buf); |
| 836 | } |
| 837 | |
| 838 | void |
| 839 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
| 840 | { |
| 841 | gdb_assert (regnum >= 0); |
| 842 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 843 | if (regnum < regcache->descr->nr_raw_registers) |
| 844 | regcache_raw_read (regcache, regnum, buf); |
| 845 | else if (regcache->readonly_p |
| 846 | && regnum < regcache->descr->nr_cooked_registers |
| 847 | && regcache->register_valid_p[regnum]) |
| 848 | /* Read-only register cache, perhaphs the cooked value was cached? */ |
| 849 | memcpy (buf, register_buffer (regcache, regnum), |
| 850 | regcache->descr->sizeof_register[regnum]); |
| 851 | else |
| 852 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
| 853 | regnum, buf); |
| 854 | } |
| 855 | |
| 856 | void |
| 857 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
| 858 | LONGEST *val) |
| 859 | { |
| 860 | char *buf; |
| 861 | gdb_assert (regcache != NULL); |
| 862 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 863 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 864 | regcache_cooked_read (regcache, regnum, buf); |
| 865 | (*val) = extract_signed_integer (buf, |
| 866 | regcache->descr->sizeof_register[regnum]); |
| 867 | } |
| 868 | |
| 869 | void |
| 870 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
| 871 | ULONGEST *val) |
| 872 | { |
| 873 | char *buf; |
| 874 | gdb_assert (regcache != NULL); |
| 875 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 876 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 877 | regcache_cooked_read (regcache, regnum, buf); |
| 878 | (*val) = extract_unsigned_integer (buf, |
| 879 | regcache->descr->sizeof_register[regnum]); |
| 880 | } |
| 881 | |
| 882 | void |
| 883 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, |
| 884 | LONGEST val) |
| 885 | { |
| 886 | void *buf; |
| 887 | gdb_assert (regcache != NULL); |
| 888 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 889 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 890 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 891 | regcache_cooked_write (regcache, regnum, buf); |
| 892 | } |
| 893 | |
| 894 | void |
| 895 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, |
| 896 | ULONGEST val) |
| 897 | { |
| 898 | void *buf; |
| 899 | gdb_assert (regcache != NULL); |
| 900 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 901 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 902 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 903 | regcache_cooked_write (regcache, regnum, buf); |
| 904 | } |
| 905 | |
| 906 | /* Write register REGNUM at MYADDR to the target. MYADDR points at |
| 907 | REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */ |
| 908 | |
| 909 | static void |
| 910 | legacy_write_register_gen (int regnum, const void *myaddr) |
| 911 | { |
| 912 | int size; |
| 913 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 914 | |
| 915 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 916 | change the registers array if something writes to this register. */ |
| 917 | if (CANNOT_STORE_REGISTER (regnum)) |
| 918 | return; |
| 919 | |
| 920 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 921 | { |
| 922 | registers_changed (); |
| 923 | registers_ptid = inferior_ptid; |
| 924 | } |
| 925 | |
| 926 | size = DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 927 | |
| 928 | if (real_register (regnum)) |
| 929 | { |
| 930 | /* If we have a valid copy of the register, and new value == old |
| 931 | value, then don't bother doing the actual store. */ |
| 932 | if (register_cached (regnum) |
| 933 | && (memcmp (register_buffer (current_regcache, regnum), myaddr, size) |
| 934 | == 0)) |
| 935 | return; |
| 936 | else |
| 937 | target_prepare_to_store (); |
| 938 | } |
| 939 | |
| 940 | memcpy (register_buffer (current_regcache, regnum), myaddr, size); |
| 941 | |
| 942 | set_register_cached (regnum, 1); |
| 943 | target_store_registers (regnum); |
| 944 | } |
| 945 | |
| 946 | void |
| 947 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
| 948 | { |
| 949 | gdb_assert (regcache != NULL && buf != NULL); |
| 950 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 951 | gdb_assert (!regcache->readonly_p); |
| 952 | |
| 953 | if (regcache->descr->legacy_p) |
| 954 | { |
| 955 | /* For moment, just use underlying legacy code. Ulgh!!! This |
| 956 | silently and very indirectly updates the regcache's buffers |
| 957 | via the globals deprecated_register_valid[] and registers[]. */ |
| 958 | gdb_assert (regcache == current_regcache); |
| 959 | legacy_write_register_gen (regnum, buf); |
| 960 | return; |
| 961 | } |
| 962 | |
| 963 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 964 | change the registers array if something writes to this register. */ |
| 965 | if (CANNOT_STORE_REGISTER (regnum)) |
| 966 | return; |
| 967 | |
| 968 | /* Make certain that the correct cache is selected. */ |
| 969 | gdb_assert (regcache == current_regcache); |
| 970 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 971 | { |
| 972 | registers_changed (); |
| 973 | registers_ptid = inferior_ptid; |
| 974 | } |
| 975 | |
| 976 | /* If we have a valid copy of the register, and new value == old |
| 977 | value, then don't bother doing the actual store. */ |
| 978 | if (regcache_valid_p (regcache, regnum) |
| 979 | && (memcmp (register_buffer (regcache, regnum), buf, |
| 980 | regcache->descr->sizeof_register[regnum]) == 0)) |
| 981 | return; |
| 982 | |
| 983 | target_prepare_to_store (); |
| 984 | memcpy (register_buffer (regcache, regnum), buf, |
| 985 | regcache->descr->sizeof_register[regnum]); |
| 986 | regcache->register_valid_p[regnum] = 1; |
| 987 | target_store_registers (regnum); |
| 988 | } |
| 989 | |
| 990 | void |
| 991 | deprecated_write_register_gen (int regnum, char *buf) |
| 992 | { |
| 993 | gdb_assert (current_regcache != NULL); |
| 994 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); |
| 995 | if (current_regcache->descr->legacy_p) |
| 996 | { |
| 997 | legacy_write_register_gen (regnum, buf); |
| 998 | return; |
| 999 | } |
| 1000 | regcache_cooked_write (current_regcache, regnum, buf); |
| 1001 | } |
| 1002 | |
| 1003 | void |
| 1004 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
| 1005 | { |
| 1006 | gdb_assert (regnum >= 0); |
| 1007 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 1008 | if (regnum < regcache->descr->nr_raw_registers) |
| 1009 | regcache_raw_write (regcache, regnum, buf); |
| 1010 | else |
| 1011 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
| 1012 | regnum, buf); |
| 1013 | } |
| 1014 | |
| 1015 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
| 1016 | into registers starting with the MYREGSTART'th byte of register data. */ |
| 1017 | |
| 1018 | void |
| 1019 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
| 1020 | { |
| 1021 | int myregend = myregstart + inlen; |
| 1022 | int regnum; |
| 1023 | |
| 1024 | target_prepare_to_store (); |
| 1025 | |
| 1026 | /* Scan through the registers updating any that are covered by the |
| 1027 | range myregstart<=>myregend using write_register_gen, which does |
| 1028 | nice things like handling threads, and avoiding updates when the |
| 1029 | new and old contents are the same. */ |
| 1030 | |
| 1031 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| 1032 | { |
| 1033 | int regstart, regend; |
| 1034 | |
| 1035 | regstart = DEPRECATED_REGISTER_BYTE (regnum); |
| 1036 | regend = regstart + DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 1037 | |
| 1038 | /* Is this register completely outside the range the user is writing? */ |
| 1039 | if (myregend <= regstart || regend <= myregstart) |
| 1040 | /* do nothing */ ; |
| 1041 | |
| 1042 | /* Is this register completely within the range the user is writing? */ |
| 1043 | else if (myregstart <= regstart && regend <= myregend) |
| 1044 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
| 1045 | |
| 1046 | /* The register partially overlaps the range being written. */ |
| 1047 | else |
| 1048 | { |
| 1049 | char regbuf[MAX_REGISTER_SIZE]; |
| 1050 | /* What's the overlap between this register's bytes and |
| 1051 | those the caller wants to write? */ |
| 1052 | int overlapstart = max (regstart, myregstart); |
| 1053 | int overlapend = min (regend, myregend); |
| 1054 | |
| 1055 | /* We may be doing a partial update of an invalid register. |
| 1056 | Update it from the target before scribbling on it. */ |
| 1057 | deprecated_read_register_gen (regnum, regbuf); |
| 1058 | |
| 1059 | memcpy (&deprecated_registers[overlapstart], |
| 1060 | myaddr + (overlapstart - myregstart), |
| 1061 | overlapend - overlapstart); |
| 1062 | |
| 1063 | target_store_registers (regnum); |
| 1064 | } |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | /* Perform a partial register transfer using a read, modify, write |
| 1069 | operation. */ |
| 1070 | |
| 1071 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, |
| 1072 | void *buf); |
| 1073 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, |
| 1074 | const void *buf); |
| 1075 | |
| 1076 | static void |
| 1077 | regcache_xfer_part (struct regcache *regcache, int regnum, |
| 1078 | int offset, int len, void *in, const void *out, |
| 1079 | regcache_read_ftype *read, regcache_write_ftype *write) |
| 1080 | { |
| 1081 | struct regcache_descr *descr = regcache->descr; |
| 1082 | bfd_byte reg[MAX_REGISTER_SIZE]; |
| 1083 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
| 1084 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); |
| 1085 | /* Something to do? */ |
| 1086 | if (offset + len == 0) |
| 1087 | return; |
| 1088 | /* Read (when needed) ... */ |
| 1089 | if (in != NULL |
| 1090 | || offset > 0 |
| 1091 | || offset + len < descr->sizeof_register[regnum]) |
| 1092 | { |
| 1093 | gdb_assert (read != NULL); |
| 1094 | read (regcache, regnum, reg); |
| 1095 | } |
| 1096 | /* ... modify ... */ |
| 1097 | if (in != NULL) |
| 1098 | memcpy (in, reg + offset, len); |
| 1099 | if (out != NULL) |
| 1100 | memcpy (reg + offset, out, len); |
| 1101 | /* ... write (when needed). */ |
| 1102 | if (out != NULL) |
| 1103 | { |
| 1104 | gdb_assert (write != NULL); |
| 1105 | write (regcache, regnum, reg); |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | void |
| 1110 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
| 1111 | int offset, int len, void *buf) |
| 1112 | { |
| 1113 | struct regcache_descr *descr = regcache->descr; |
| 1114 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 1115 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 1116 | regcache_raw_read, regcache_raw_write); |
| 1117 | } |
| 1118 | |
| 1119 | void |
| 1120 | regcache_raw_write_part (struct regcache *regcache, int regnum, |
| 1121 | int offset, int len, const void *buf) |
| 1122 | { |
| 1123 | struct regcache_descr *descr = regcache->descr; |
| 1124 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 1125 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 1126 | regcache_raw_read, regcache_raw_write); |
| 1127 | } |
| 1128 | |
| 1129 | void |
| 1130 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
| 1131 | int offset, int len, void *buf) |
| 1132 | { |
| 1133 | struct regcache_descr *descr = regcache->descr; |
| 1134 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 1135 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 1136 | regcache_cooked_read, regcache_cooked_write); |
| 1137 | } |
| 1138 | |
| 1139 | void |
| 1140 | regcache_cooked_write_part (struct regcache *regcache, int regnum, |
| 1141 | int offset, int len, const void *buf) |
| 1142 | { |
| 1143 | struct regcache_descr *descr = regcache->descr; |
| 1144 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 1145 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 1146 | regcache_cooked_read, regcache_cooked_write); |
| 1147 | } |
| 1148 | |
| 1149 | /* Hack to keep code that view the register buffer as raw bytes |
| 1150 | working. */ |
| 1151 | |
| 1152 | int |
| 1153 | register_offset_hack (struct gdbarch *gdbarch, int regnum) |
| 1154 | { |
| 1155 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 1156 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 1157 | return descr->register_offset[regnum]; |
| 1158 | } |
| 1159 | |
| 1160 | /* Return the contents of register REGNUM as an unsigned integer. */ |
| 1161 | |
| 1162 | ULONGEST |
| 1163 | read_register (int regnum) |
| 1164 | { |
| 1165 | char *buf = alloca (DEPRECATED_REGISTER_RAW_SIZE (regnum)); |
| 1166 | deprecated_read_register_gen (regnum, buf); |
| 1167 | return (extract_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (regnum))); |
| 1168 | } |
| 1169 | |
| 1170 | ULONGEST |
| 1171 | read_register_pid (int regnum, ptid_t ptid) |
| 1172 | { |
| 1173 | ptid_t save_ptid; |
| 1174 | int save_pid; |
| 1175 | CORE_ADDR retval; |
| 1176 | |
| 1177 | if (ptid_equal (ptid, inferior_ptid)) |
| 1178 | return read_register (regnum); |
| 1179 | |
| 1180 | save_ptid = inferior_ptid; |
| 1181 | |
| 1182 | inferior_ptid = ptid; |
| 1183 | |
| 1184 | retval = read_register (regnum); |
| 1185 | |
| 1186 | inferior_ptid = save_ptid; |
| 1187 | |
| 1188 | return retval; |
| 1189 | } |
| 1190 | |
| 1191 | /* Store VALUE into the raw contents of register number REGNUM. */ |
| 1192 | |
| 1193 | void |
| 1194 | write_register (int regnum, LONGEST val) |
| 1195 | { |
| 1196 | void *buf; |
| 1197 | int size; |
| 1198 | size = DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 1199 | buf = alloca (size); |
| 1200 | store_signed_integer (buf, size, (LONGEST) val); |
| 1201 | deprecated_write_register_gen (regnum, buf); |
| 1202 | } |
| 1203 | |
| 1204 | void |
| 1205 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
| 1206 | { |
| 1207 | ptid_t save_ptid; |
| 1208 | |
| 1209 | if (ptid_equal (ptid, inferior_ptid)) |
| 1210 | { |
| 1211 | write_register (regnum, val); |
| 1212 | return; |
| 1213 | } |
| 1214 | |
| 1215 | save_ptid = inferior_ptid; |
| 1216 | |
| 1217 | inferior_ptid = ptid; |
| 1218 | |
| 1219 | write_register (regnum, val); |
| 1220 | |
| 1221 | inferior_ptid = save_ptid; |
| 1222 | } |
| 1223 | |
| 1224 | /* FIXME: kettenis/20030828: We should get rid of supply_register and |
| 1225 | regcache_collect in favour of regcache_raw_supply and |
| 1226 | regcache_raw_collect. */ |
| 1227 | |
| 1228 | /* SUPPLY_REGISTER() |
| 1229 | |
| 1230 | Record that register REGNUM contains VAL. This is used when the |
| 1231 | value is obtained from the inferior or core dump, so there is no |
| 1232 | need to store the value there. |
| 1233 | |
| 1234 | If VAL is a NULL pointer, then it's probably an unsupported register. |
| 1235 | We just set its value to all zeros. We might want to record this |
| 1236 | fact, and report it to the users of read_register and friends. */ |
| 1237 | |
| 1238 | void |
| 1239 | supply_register (int regnum, const void *val) |
| 1240 | { |
| 1241 | regcache_raw_supply (current_regcache, regnum, val); |
| 1242 | } |
| 1243 | |
| 1244 | void |
| 1245 | regcache_collect (int regnum, void *buf) |
| 1246 | { |
| 1247 | regcache_raw_collect (current_regcache, regnum, buf); |
| 1248 | } |
| 1249 | |
| 1250 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
| 1251 | |
| 1252 | void |
| 1253 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
| 1254 | { |
| 1255 | void *regbuf; |
| 1256 | size_t size; |
| 1257 | |
| 1258 | gdb_assert (regcache != NULL); |
| 1259 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 1260 | gdb_assert (!regcache->readonly_p); |
| 1261 | |
| 1262 | /* FIXME: kettenis/20030828: It shouldn't be necessary to handle |
| 1263 | CURRENT_REGCACHE specially here. */ |
| 1264 | if (regcache == current_regcache |
| 1265 | && !ptid_equal (registers_ptid, inferior_ptid)) |
| 1266 | { |
| 1267 | registers_changed (); |
| 1268 | registers_ptid = inferior_ptid; |
| 1269 | } |
| 1270 | |
| 1271 | regbuf = register_buffer (regcache, regnum); |
| 1272 | size = regcache->descr->sizeof_register[regnum]; |
| 1273 | |
| 1274 | if (buf) |
| 1275 | memcpy (regbuf, buf, size); |
| 1276 | else |
| 1277 | memset (regbuf, 0, size); |
| 1278 | |
| 1279 | /* Mark the register as cached. */ |
| 1280 | regcache->register_valid_p[regnum] = 1; |
| 1281 | } |
| 1282 | |
| 1283 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
| 1284 | |
| 1285 | void |
| 1286 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
| 1287 | { |
| 1288 | const void *regbuf; |
| 1289 | size_t size; |
| 1290 | |
| 1291 | gdb_assert (regcache != NULL && buf != NULL); |
| 1292 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 1293 | |
| 1294 | regbuf = register_buffer (regcache, regnum); |
| 1295 | size = regcache->descr->sizeof_register[regnum]; |
| 1296 | memcpy (buf, regbuf, size); |
| 1297 | } |
| 1298 | |
| 1299 | |
| 1300 | /* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special |
| 1301 | handling for registers PC, SP, and FP. */ |
| 1302 | |
| 1303 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc(), |
| 1304 | read_sp(), and deprecated_read_fp(), will eventually be replaced by |
| 1305 | per-frame methods. Instead of relying on the global INFERIOR_PTID, |
| 1306 | they will use the contextual information provided by the FRAME. |
| 1307 | These functions do not belong in the register cache. */ |
| 1308 | |
| 1309 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
| 1310 | write_pc_pid(), write_pc(), and deprecated_read_fp(), all need to |
| 1311 | be replaced by something that does not rely on global state. But |
| 1312 | what? */ |
| 1313 | |
| 1314 | CORE_ADDR |
| 1315 | read_pc_pid (ptid_t ptid) |
| 1316 | { |
| 1317 | ptid_t saved_inferior_ptid; |
| 1318 | CORE_ADDR pc_val; |
| 1319 | |
| 1320 | /* In case ptid != inferior_ptid. */ |
| 1321 | saved_inferior_ptid = inferior_ptid; |
| 1322 | inferior_ptid = ptid; |
| 1323 | |
| 1324 | if (TARGET_READ_PC_P ()) |
| 1325 | pc_val = TARGET_READ_PC (ptid); |
| 1326 | /* Else use per-frame method on get_current_frame. */ |
| 1327 | else if (PC_REGNUM >= 0) |
| 1328 | { |
| 1329 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); |
| 1330 | pc_val = ADDR_BITS_REMOVE (raw_val); |
| 1331 | } |
| 1332 | else |
| 1333 | internal_error (__FILE__, __LINE__, "read_pc_pid: Unable to find PC"); |
| 1334 | |
| 1335 | inferior_ptid = saved_inferior_ptid; |
| 1336 | return pc_val; |
| 1337 | } |
| 1338 | |
| 1339 | CORE_ADDR |
| 1340 | read_pc (void) |
| 1341 | { |
| 1342 | return read_pc_pid (inferior_ptid); |
| 1343 | } |
| 1344 | |
| 1345 | void |
| 1346 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
| 1347 | { |
| 1348 | if (PC_REGNUM >= 0) |
| 1349 | write_register_pid (PC_REGNUM, pc, ptid); |
| 1350 | else |
| 1351 | internal_error (__FILE__, __LINE__, |
| 1352 | "generic_target_write_pc"); |
| 1353 | } |
| 1354 | |
| 1355 | void |
| 1356 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
| 1357 | { |
| 1358 | ptid_t saved_inferior_ptid; |
| 1359 | |
| 1360 | /* In case ptid != inferior_ptid. */ |
| 1361 | saved_inferior_ptid = inferior_ptid; |
| 1362 | inferior_ptid = ptid; |
| 1363 | |
| 1364 | TARGET_WRITE_PC (pc, ptid); |
| 1365 | |
| 1366 | inferior_ptid = saved_inferior_ptid; |
| 1367 | } |
| 1368 | |
| 1369 | void |
| 1370 | write_pc (CORE_ADDR pc) |
| 1371 | { |
| 1372 | write_pc_pid (pc, inferior_ptid); |
| 1373 | } |
| 1374 | |
| 1375 | /* Cope with strage ways of getting to the stack and frame pointers */ |
| 1376 | |
| 1377 | CORE_ADDR |
| 1378 | read_sp (void) |
| 1379 | { |
| 1380 | if (TARGET_READ_SP_P ()) |
| 1381 | return TARGET_READ_SP (); |
| 1382 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
| 1383 | return get_frame_sp (get_current_frame ()); |
| 1384 | else if (SP_REGNUM >= 0) |
| 1385 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
| 1386 | about the architecture so put it at the end. */ |
| 1387 | return read_register (SP_REGNUM); |
| 1388 | internal_error (__FILE__, __LINE__, "read_sp: Unable to find SP"); |
| 1389 | } |
| 1390 | |
| 1391 | void |
| 1392 | deprecated_write_sp (CORE_ADDR val) |
| 1393 | { |
| 1394 | gdb_assert (SP_REGNUM >= 0); |
| 1395 | write_register (SP_REGNUM, val); |
| 1396 | } |
| 1397 | |
| 1398 | CORE_ADDR |
| 1399 | deprecated_read_fp (void) |
| 1400 | { |
| 1401 | if (DEPRECATED_TARGET_READ_FP_P ()) |
| 1402 | return DEPRECATED_TARGET_READ_FP (); |
| 1403 | else if (DEPRECATED_FP_REGNUM >= 0) |
| 1404 | return read_register (DEPRECATED_FP_REGNUM); |
| 1405 | else |
| 1406 | internal_error (__FILE__, __LINE__, "deprecated_read_fp"); |
| 1407 | } |
| 1408 | |
| 1409 | static void |
| 1410 | reg_flush_command (char *command, int from_tty) |
| 1411 | { |
| 1412 | /* Force-flush the register cache. */ |
| 1413 | registers_changed (); |
| 1414 | if (from_tty) |
| 1415 | printf_filtered ("Register cache flushed.\n"); |
| 1416 | } |
| 1417 | |
| 1418 | static void |
| 1419 | build_regcache (void) |
| 1420 | { |
| 1421 | current_regcache = regcache_xmalloc (current_gdbarch); |
| 1422 | current_regcache->readonly_p = 0; |
| 1423 | deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache); |
| 1424 | deprecated_register_valid = current_regcache->register_valid_p; |
| 1425 | } |
| 1426 | |
| 1427 | static void |
| 1428 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, |
| 1429 | const unsigned char *buf, long len) |
| 1430 | { |
| 1431 | int i; |
| 1432 | switch (endian) |
| 1433 | { |
| 1434 | case BFD_ENDIAN_BIG: |
| 1435 | for (i = 0; i < len; i++) |
| 1436 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 1437 | break; |
| 1438 | case BFD_ENDIAN_LITTLE: |
| 1439 | for (i = len - 1; i >= 0; i--) |
| 1440 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 1441 | break; |
| 1442 | default: |
| 1443 | internal_error (__FILE__, __LINE__, "Bad switch"); |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | enum regcache_dump_what |
| 1448 | { |
| 1449 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
| 1450 | }; |
| 1451 | |
| 1452 | static void |
| 1453 | regcache_dump (struct regcache *regcache, struct ui_file *file, |
| 1454 | enum regcache_dump_what what_to_dump) |
| 1455 | { |
| 1456 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 1457 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
| 1458 | int regnum; |
| 1459 | int footnote_nr = 0; |
| 1460 | int footnote_register_size = 0; |
| 1461 | int footnote_register_offset = 0; |
| 1462 | int footnote_register_type_name_null = 0; |
| 1463 | long register_offset = 0; |
| 1464 | unsigned char buf[MAX_REGISTER_SIZE]; |
| 1465 | |
| 1466 | #if 0 |
| 1467 | fprintf_unfiltered (file, "legacy_p %d\n", regcache->descr->legacy_p); |
| 1468 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
| 1469 | regcache->descr->nr_raw_registers); |
| 1470 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", |
| 1471 | regcache->descr->nr_cooked_registers); |
| 1472 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", |
| 1473 | regcache->descr->sizeof_raw_registers); |
| 1474 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", |
| 1475 | regcache->descr->sizeof_raw_register_valid_p); |
| 1476 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
| 1477 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); |
| 1478 | #endif |
| 1479 | |
| 1480 | gdb_assert (regcache->descr->nr_cooked_registers |
| 1481 | == (NUM_REGS + NUM_PSEUDO_REGS)); |
| 1482 | |
| 1483 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) |
| 1484 | { |
| 1485 | /* Name. */ |
| 1486 | if (regnum < 0) |
| 1487 | fprintf_unfiltered (file, " %-10s", "Name"); |
| 1488 | else |
| 1489 | { |
| 1490 | const char *p = REGISTER_NAME (regnum); |
| 1491 | if (p == NULL) |
| 1492 | p = ""; |
| 1493 | else if (p[0] == '\0') |
| 1494 | p = "''"; |
| 1495 | fprintf_unfiltered (file, " %-10s", p); |
| 1496 | } |
| 1497 | |
| 1498 | /* Number. */ |
| 1499 | if (regnum < 0) |
| 1500 | fprintf_unfiltered (file, " %4s", "Nr"); |
| 1501 | else |
| 1502 | fprintf_unfiltered (file, " %4d", regnum); |
| 1503 | |
| 1504 | /* Relative number. */ |
| 1505 | if (regnum < 0) |
| 1506 | fprintf_unfiltered (file, " %4s", "Rel"); |
| 1507 | else if (regnum < NUM_REGS) |
| 1508 | fprintf_unfiltered (file, " %4d", regnum); |
| 1509 | else |
| 1510 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); |
| 1511 | |
| 1512 | /* Offset. */ |
| 1513 | if (regnum < 0) |
| 1514 | fprintf_unfiltered (file, " %6s ", "Offset"); |
| 1515 | else |
| 1516 | { |
| 1517 | fprintf_unfiltered (file, " %6ld", |
| 1518 | regcache->descr->register_offset[regnum]); |
| 1519 | if (register_offset != regcache->descr->register_offset[regnum] |
| 1520 | || register_offset != DEPRECATED_REGISTER_BYTE (regnum) |
| 1521 | || (regnum > 0 |
| 1522 | && (regcache->descr->register_offset[regnum] |
| 1523 | != (regcache->descr->register_offset[regnum - 1] |
| 1524 | + regcache->descr->sizeof_register[regnum - 1]))) |
| 1525 | ) |
| 1526 | { |
| 1527 | if (!footnote_register_offset) |
| 1528 | footnote_register_offset = ++footnote_nr; |
| 1529 | fprintf_unfiltered (file, "*%d", footnote_register_offset); |
| 1530 | } |
| 1531 | else |
| 1532 | fprintf_unfiltered (file, " "); |
| 1533 | register_offset = (regcache->descr->register_offset[regnum] |
| 1534 | + regcache->descr->sizeof_register[regnum]); |
| 1535 | } |
| 1536 | |
| 1537 | /* Size. */ |
| 1538 | if (regnum < 0) |
| 1539 | fprintf_unfiltered (file, " %5s ", "Size"); |
| 1540 | else |
| 1541 | { |
| 1542 | fprintf_unfiltered (file, " %5ld", |
| 1543 | regcache->descr->sizeof_register[regnum]); |
| 1544 | if ((regcache->descr->sizeof_register[regnum] |
| 1545 | != DEPRECATED_REGISTER_RAW_SIZE (regnum)) |
| 1546 | || (regcache->descr->sizeof_register[regnum] |
| 1547 | != DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum)) |
| 1548 | || (regcache->descr->sizeof_register[regnum] |
| 1549 | != TYPE_LENGTH (register_type (regcache->descr->gdbarch, |
| 1550 | regnum))) |
| 1551 | ) |
| 1552 | { |
| 1553 | if (!footnote_register_size) |
| 1554 | footnote_register_size = ++footnote_nr; |
| 1555 | fprintf_unfiltered (file, "*%d", footnote_register_size); |
| 1556 | } |
| 1557 | else |
| 1558 | fprintf_unfiltered (file, " "); |
| 1559 | } |
| 1560 | |
| 1561 | /* Type. */ |
| 1562 | { |
| 1563 | const char *t; |
| 1564 | if (regnum < 0) |
| 1565 | t = "Type"; |
| 1566 | else |
| 1567 | { |
| 1568 | static const char blt[] = "builtin_type"; |
| 1569 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); |
| 1570 | if (t == NULL) |
| 1571 | { |
| 1572 | char *n; |
| 1573 | if (!footnote_register_type_name_null) |
| 1574 | footnote_register_type_name_null = ++footnote_nr; |
| 1575 | xasprintf (&n, "*%d", footnote_register_type_name_null); |
| 1576 | make_cleanup (xfree, n); |
| 1577 | t = n; |
| 1578 | } |
| 1579 | /* Chop a leading builtin_type. */ |
| 1580 | if (strncmp (t, blt, strlen (blt)) == 0) |
| 1581 | t += strlen (blt); |
| 1582 | } |
| 1583 | fprintf_unfiltered (file, " %-15s", t); |
| 1584 | } |
| 1585 | |
| 1586 | /* Leading space always present. */ |
| 1587 | fprintf_unfiltered (file, " "); |
| 1588 | |
| 1589 | /* Value, raw. */ |
| 1590 | if (what_to_dump == regcache_dump_raw) |
| 1591 | { |
| 1592 | if (regnum < 0) |
| 1593 | fprintf_unfiltered (file, "Raw value"); |
| 1594 | else if (regnum >= regcache->descr->nr_raw_registers) |
| 1595 | fprintf_unfiltered (file, "<cooked>"); |
| 1596 | else if (!regcache_valid_p (regcache, regnum)) |
| 1597 | fprintf_unfiltered (file, "<invalid>"); |
| 1598 | else |
| 1599 | { |
| 1600 | regcache_raw_read (regcache, regnum, buf); |
| 1601 | fprintf_unfiltered (file, "0x"); |
| 1602 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, |
| 1603 | DEPRECATED_REGISTER_RAW_SIZE (regnum)); |
| 1604 | } |
| 1605 | } |
| 1606 | |
| 1607 | /* Value, cooked. */ |
| 1608 | if (what_to_dump == regcache_dump_cooked) |
| 1609 | { |
| 1610 | if (regnum < 0) |
| 1611 | fprintf_unfiltered (file, "Cooked value"); |
| 1612 | else |
| 1613 | { |
| 1614 | regcache_cooked_read (regcache, regnum, buf); |
| 1615 | fprintf_unfiltered (file, "0x"); |
| 1616 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, |
| 1617 | DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum)); |
| 1618 | } |
| 1619 | } |
| 1620 | |
| 1621 | /* Group members. */ |
| 1622 | if (what_to_dump == regcache_dump_groups) |
| 1623 | { |
| 1624 | if (regnum < 0) |
| 1625 | fprintf_unfiltered (file, "Groups"); |
| 1626 | else |
| 1627 | { |
| 1628 | const char *sep = ""; |
| 1629 | struct reggroup *group; |
| 1630 | for (group = reggroup_next (gdbarch, NULL); |
| 1631 | group != NULL; |
| 1632 | group = reggroup_next (gdbarch, group)) |
| 1633 | { |
| 1634 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 1635 | { |
| 1636 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group)); |
| 1637 | sep = ","; |
| 1638 | } |
| 1639 | } |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | fprintf_unfiltered (file, "\n"); |
| 1644 | } |
| 1645 | |
| 1646 | if (footnote_register_size) |
| 1647 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", |
| 1648 | footnote_register_size); |
| 1649 | if (footnote_register_offset) |
| 1650 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", |
| 1651 | footnote_register_offset); |
| 1652 | if (footnote_register_type_name_null) |
| 1653 | fprintf_unfiltered (file, |
| 1654 | "*%d: Register type's name NULL.\n", |
| 1655 | footnote_register_type_name_null); |
| 1656 | do_cleanups (cleanups); |
| 1657 | } |
| 1658 | |
| 1659 | static void |
| 1660 | regcache_print (char *args, enum regcache_dump_what what_to_dump) |
| 1661 | { |
| 1662 | if (args == NULL) |
| 1663 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); |
| 1664 | else |
| 1665 | { |
| 1666 | struct ui_file *file = gdb_fopen (args, "w"); |
| 1667 | if (file == NULL) |
| 1668 | perror_with_name ("maintenance print architecture"); |
| 1669 | regcache_dump (current_regcache, file, what_to_dump); |
| 1670 | ui_file_delete (file); |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | static void |
| 1675 | maintenance_print_registers (char *args, int from_tty) |
| 1676 | { |
| 1677 | regcache_print (args, regcache_dump_none); |
| 1678 | } |
| 1679 | |
| 1680 | static void |
| 1681 | maintenance_print_raw_registers (char *args, int from_tty) |
| 1682 | { |
| 1683 | regcache_print (args, regcache_dump_raw); |
| 1684 | } |
| 1685 | |
| 1686 | static void |
| 1687 | maintenance_print_cooked_registers (char *args, int from_tty) |
| 1688 | { |
| 1689 | regcache_print (args, regcache_dump_cooked); |
| 1690 | } |
| 1691 | |
| 1692 | static void |
| 1693 | maintenance_print_register_groups (char *args, int from_tty) |
| 1694 | { |
| 1695 | regcache_print (args, regcache_dump_groups); |
| 1696 | } |
| 1697 | |
| 1698 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
| 1699 | |
| 1700 | void |
| 1701 | _initialize_regcache (void) |
| 1702 | { |
| 1703 | regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr); |
| 1704 | DEPRECATED_REGISTER_GDBARCH_SWAP (current_regcache); |
| 1705 | DEPRECATED_REGISTER_GDBARCH_SWAP (deprecated_registers); |
| 1706 | DEPRECATED_REGISTER_GDBARCH_SWAP (deprecated_register_valid); |
| 1707 | deprecated_register_gdbarch_swap (NULL, 0, build_regcache); |
| 1708 | |
| 1709 | observer_attach_target_changed (regcache_observer_target_changed); |
| 1710 | |
| 1711 | add_com ("flushregs", class_maintenance, reg_flush_command, |
| 1712 | "Force gdb to flush its register cache (maintainer command)"); |
| 1713 | |
| 1714 | /* Initialize the thread/process associated with the current set of |
| 1715 | registers. For now, -1 is special, and means `no current process'. */ |
| 1716 | registers_ptid = pid_to_ptid (-1); |
| 1717 | |
| 1718 | add_cmd ("registers", class_maintenance, |
| 1719 | maintenance_print_registers, |
| 1720 | "Print the internal register configuration.\ |
| 1721 | Takes an optional file parameter.", |
| 1722 | &maintenanceprintlist); |
| 1723 | add_cmd ("raw-registers", class_maintenance, |
| 1724 | maintenance_print_raw_registers, |
| 1725 | "Print the internal register configuration including raw values.\ |
| 1726 | Takes an optional file parameter.", |
| 1727 | &maintenanceprintlist); |
| 1728 | add_cmd ("cooked-registers", class_maintenance, |
| 1729 | maintenance_print_cooked_registers, |
| 1730 | "Print the internal register configuration including cooked values.\ |
| 1731 | Takes an optional file parameter.", |
| 1732 | &maintenanceprintlist); |
| 1733 | add_cmd ("register-groups", class_maintenance, |
| 1734 | maintenance_print_register_groups, |
| 1735 | "Print the internal register configuration including each register's group.\ |
| 1736 | Takes an optional file parameter.", |
| 1737 | &maintenanceprintlist); |
| 1738 | |
| 1739 | } |