| 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 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 | |
| 34 | /* |
| 35 | * DATA STRUCTURE |
| 36 | * |
| 37 | * Here is the actual register cache. |
| 38 | */ |
| 39 | |
| 40 | /* Per-architecture object describing the layout of a register cache. |
| 41 | Computed once when the architecture is created */ |
| 42 | |
| 43 | struct gdbarch_data *regcache_descr_handle; |
| 44 | |
| 45 | struct regcache_descr |
| 46 | { |
| 47 | /* The architecture this descriptor belongs to. */ |
| 48 | struct gdbarch *gdbarch; |
| 49 | |
| 50 | /* Is this a ``legacy'' register cache? Such caches reserve space |
| 51 | for raw and pseudo registers and allow access to both. */ |
| 52 | int legacy_p; |
| 53 | |
| 54 | /* The raw register cache. Each raw (or hard) register is supplied |
| 55 | by the target interface. The raw cache should not contain |
| 56 | redundant information - if the PC is constructed from two |
| 57 | registers then those regigisters and not the PC lives in the raw |
| 58 | cache. */ |
| 59 | int nr_raw_registers; |
| 60 | long sizeof_raw_registers; |
| 61 | long sizeof_raw_register_valid_p; |
| 62 | |
| 63 | /* The cooked register space. Each cooked register in the range |
| 64 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw |
| 65 | register. The remaining [NR_RAW_REGISTERS |
| 66 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo regiters) are mapped onto |
| 67 | both raw registers and memory by the architecture methods |
| 68 | gdbarch_register_read and gdbarch_register_write. */ |
| 69 | int nr_cooked_registers; |
| 70 | long sizeof_cooked_registers; |
| 71 | long sizeof_cooked_register_valid_p; |
| 72 | |
| 73 | /* Offset and size (in 8 bit bytes), of reach register in the |
| 74 | register cache. All registers (including those in the range |
| 75 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. |
| 76 | Assigning all registers an offset makes it possible to keep |
| 77 | legacy code, such as that found in read_register_bytes() and |
| 78 | write_register_bytes() working. */ |
| 79 | long *register_offset; |
| 80 | long *sizeof_register; |
| 81 | |
| 82 | /* Cached table containing the type of each register. */ |
| 83 | struct type **register_type; |
| 84 | }; |
| 85 | |
| 86 | static void |
| 87 | init_legacy_regcache_descr (struct gdbarch *gdbarch, |
| 88 | struct regcache_descr *descr) |
| 89 | { |
| 90 | int i; |
| 91 | /* FIXME: cagney/2002-05-11: gdbarch_data() should take that |
| 92 | ``gdbarch'' as a parameter. */ |
| 93 | gdb_assert (gdbarch != NULL); |
| 94 | |
| 95 | /* Compute the offset of each register. Legacy architectures define |
| 96 | DEPRECATED_REGISTER_BYTE() so use that. */ |
| 97 | /* FIXME: cagney/2002-11-07: Instead of using |
| 98 | DEPRECATED_REGISTER_BYTE() this code should, as is done in |
| 99 | init_regcache_descr(), compute the offets at runtime. This |
| 100 | currently isn't possible as some ISAs define overlapping register |
| 101 | regions - see the mess in read_register_bytes() and |
| 102 | write_register_bytes() registers. */ |
| 103 | descr->sizeof_register |
| 104 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 105 | descr->register_offset |
| 106 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 107 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 108 | { |
| 109 | /* FIXME: cagney/2001-12-04: This code shouldn't need to use |
| 110 | DEPRECATED_REGISTER_BYTE(). Unfortunately, legacy code likes |
| 111 | to lay the buffer out so that certain registers just happen |
| 112 | to overlap. Ulgh! New targets use gdbarch's register |
| 113 | read/write and entirely avoid this uglyness. */ |
| 114 | descr->register_offset[i] = DEPRECATED_REGISTER_BYTE (i); |
| 115 | descr->sizeof_register[i] = DEPRECATED_REGISTER_RAW_SIZE (i); |
| 116 | gdb_assert (MAX_REGISTER_SIZE >= DEPRECATED_REGISTER_RAW_SIZE (i)); |
| 117 | gdb_assert (MAX_REGISTER_SIZE >= DEPRECATED_REGISTER_VIRTUAL_SIZE (i)); |
| 118 | } |
| 119 | |
| 120 | /* Compute the real size of the register buffer. Start out by |
| 121 | trusting DEPRECATED_REGISTER_BYTES, but then adjust it upwards |
| 122 | should that be found to not be sufficient. */ |
| 123 | /* FIXME: cagney/2002-11-05: Instead of using the macro |
| 124 | DEPRECATED_REGISTER_BYTES, this code should, as is done in |
| 125 | init_regcache_descr(), compute the total number of register bytes |
| 126 | using the accumulated offsets. */ |
| 127 | descr->sizeof_cooked_registers = DEPRECATED_REGISTER_BYTES; /* OK */ |
| 128 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 129 | { |
| 130 | long regend; |
| 131 | /* Keep extending the buffer so that there is always enough |
| 132 | space for all registers. The comparison is necessary since |
| 133 | legacy code is free to put registers in random places in the |
| 134 | buffer separated by holes. Once DEPRECATED_REGISTER_BYTE() |
| 135 | is killed this can be greatly simplified. */ |
| 136 | regend = descr->register_offset[i] + descr->sizeof_register[i]; |
| 137 | if (descr->sizeof_cooked_registers < regend) |
| 138 | descr->sizeof_cooked_registers = regend; |
| 139 | } |
| 140 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
| 141 | in the register cache. Unfortunately some architectures still |
| 142 | rely on this and the pseudo_register_write() method. */ |
| 143 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; |
| 144 | } |
| 145 | |
| 146 | static void * |
| 147 | init_regcache_descr (struct gdbarch *gdbarch) |
| 148 | { |
| 149 | int i; |
| 150 | struct regcache_descr *descr; |
| 151 | gdb_assert (gdbarch != NULL); |
| 152 | |
| 153 | /* Create an initial, zero filled, table. */ |
| 154 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
| 155 | descr->gdbarch = gdbarch; |
| 156 | |
| 157 | /* Total size of the register space. The raw registers are mapped |
| 158 | directly onto the raw register cache while the pseudo's are |
| 159 | either mapped onto raw-registers or memory. */ |
| 160 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
| 161 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
| 162 | |
| 163 | /* Fill in a table of register types. */ |
| 164 | descr->register_type |
| 165 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *); |
| 166 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 167 | { |
| 168 | if (gdbarch_register_type_p (gdbarch)) |
| 169 | { |
| 170 | gdb_assert (!DEPRECATED_REGISTER_VIRTUAL_TYPE_P ()); /* OK */ |
| 171 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
| 172 | } |
| 173 | else |
| 174 | descr->register_type[i] = DEPRECATED_REGISTER_VIRTUAL_TYPE (i); /* OK */ |
| 175 | } |
| 176 | |
| 177 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
| 178 | into the register cache. */ |
| 179 | descr->nr_raw_registers = NUM_REGS; |
| 180 | |
| 181 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p |
| 182 | array. This pretects GDB from erant code that accesses elements |
| 183 | of the global register_valid_p[] array in the range [NUM_REGS |
| 184 | .. NUM_REGS + NUM_PSEUDO_REGS). */ |
| 185 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
| 186 | |
| 187 | /* If an old style architecture, fill in the remainder of the |
| 188 | register cache descriptor using the register macros. */ |
| 189 | /* NOTE: cagney/2003-06-29: If either of DEPRECATED_REGISTER_BYTE or |
| 190 | DEPRECATED_REGISTER_RAW_SIZE are still present, things are most likely |
| 191 | totally screwed. Ex: an architecture with raw register sizes |
| 192 | smaller than what DEPRECATED_REGISTER_BYTE indicates; non |
| 193 | monotonic DEPRECATED_REGISTER_BYTE values. For GDB 6 check for |
| 194 | these nasty methods and fall back to legacy code when present. |
| 195 | Sigh! */ |
| 196 | if ((!gdbarch_pseudo_register_read_p (gdbarch) |
| 197 | && !gdbarch_pseudo_register_write_p (gdbarch) |
| 198 | && !gdbarch_register_type_p (gdbarch)) |
| 199 | || DEPRECATED_REGISTER_BYTE_P () |
| 200 | || DEPRECATED_REGISTER_RAW_SIZE_P ()) |
| 201 | { |
| 202 | descr->legacy_p = 1; |
| 203 | init_legacy_regcache_descr (gdbarch, descr); |
| 204 | return descr; |
| 205 | } |
| 206 | |
| 207 | /* Lay out the register cache. |
| 208 | |
| 209 | NOTE: cagney/2002-05-22: Only register_type() is used when |
| 210 | constructing the register cache. It is assumed that the |
| 211 | register's raw size, virtual size and type length are all the |
| 212 | same. */ |
| 213 | |
| 214 | { |
| 215 | long offset = 0; |
| 216 | descr->sizeof_register |
| 217 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 218 | descr->register_offset |
| 219 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| 220 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 221 | { |
| 222 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
| 223 | descr->register_offset[i] = offset; |
| 224 | offset += descr->sizeof_register[i]; |
| 225 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
| 226 | } |
| 227 | /* Set the real size of the register cache buffer. */ |
| 228 | descr->sizeof_cooked_registers = offset; |
| 229 | } |
| 230 | |
| 231 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
| 232 | the raw registers. Unfortunately some code still accesses the |
| 233 | register array directly using the global registers[]. Until that |
| 234 | code has been purged, play safe and over allocating the register |
| 235 | buffer. Ulgh! */ |
| 236 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; |
| 237 | |
| 238 | /* Sanity check. Confirm that there is agreement between the |
| 239 | regcache and the target's redundant DEPRECATED_REGISTER_BYTE (new |
| 240 | targets should not even be defining it). */ |
| 241 | for (i = 0; i < descr->nr_cooked_registers; i++) |
| 242 | { |
| 243 | if (DEPRECATED_REGISTER_BYTE_P ()) |
| 244 | gdb_assert (descr->register_offset[i] == DEPRECATED_REGISTER_BYTE (i)); |
| 245 | #if 0 |
| 246 | gdb_assert (descr->sizeof_register[i] == DEPRECATED_REGISTER_RAW_SIZE (i)); |
| 247 | gdb_assert (descr->sizeof_register[i] == DEPRECATED_REGISTER_VIRTUAL_SIZE (i)); |
| 248 | #endif |
| 249 | } |
| 250 | /* gdb_assert (descr->sizeof_raw_registers == DEPRECATED_REGISTER_BYTES (i)); */ |
| 251 | |
| 252 | return descr; |
| 253 | } |
| 254 | |
| 255 | static struct regcache_descr * |
| 256 | regcache_descr (struct gdbarch *gdbarch) |
| 257 | { |
| 258 | return gdbarch_data (gdbarch, regcache_descr_handle); |
| 259 | } |
| 260 | |
| 261 | /* Utility functions returning useful register attributes stored in |
| 262 | the regcache descr. */ |
| 263 | |
| 264 | struct type * |
| 265 | register_type (struct gdbarch *gdbarch, int regnum) |
| 266 | { |
| 267 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 268 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 269 | return descr->register_type[regnum]; |
| 270 | } |
| 271 | |
| 272 | /* Utility functions returning useful register attributes stored in |
| 273 | the regcache descr. */ |
| 274 | |
| 275 | int |
| 276 | register_size (struct gdbarch *gdbarch, int regnum) |
| 277 | { |
| 278 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 279 | int size; |
| 280 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 281 | size = descr->sizeof_register[regnum]; |
| 282 | /* NB: The deprecated DEPRECATED_REGISTER_RAW_SIZE, if not provided, defaults |
| 283 | to the size of the register's type. */ |
| 284 | gdb_assert (size == DEPRECATED_REGISTER_RAW_SIZE (regnum)); /* OK */ |
| 285 | /* NB: Don't check the register's virtual size. It, in say the case |
| 286 | of the MIPS, may not match the raw size! */ |
| 287 | return size; |
| 288 | } |
| 289 | |
| 290 | /* The register cache for storing raw register values. */ |
| 291 | |
| 292 | struct regcache |
| 293 | { |
| 294 | struct regcache_descr *descr; |
| 295 | /* The register buffers. A read-only register cache can hold the |
| 296 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write |
| 297 | register cache can only hold [0 .. NUM_REGS). */ |
| 298 | char *registers; |
| 299 | char *register_valid_p; |
| 300 | /* Is this a read-only cache? A read-only cache is used for saving |
| 301 | the target's register state (e.g, across an inferior function |
| 302 | call or just before forcing a function return). A read-only |
| 303 | cache can only be updated via the methods regcache_dup() and |
| 304 | regcache_cpy(). The actual contents are determined by the |
| 305 | reggroup_save and reggroup_restore methods. */ |
| 306 | int readonly_p; |
| 307 | }; |
| 308 | |
| 309 | struct regcache * |
| 310 | regcache_xmalloc (struct gdbarch *gdbarch) |
| 311 | { |
| 312 | struct regcache_descr *descr; |
| 313 | struct regcache *regcache; |
| 314 | gdb_assert (gdbarch != NULL); |
| 315 | descr = regcache_descr (gdbarch); |
| 316 | regcache = XMALLOC (struct regcache); |
| 317 | regcache->descr = descr; |
| 318 | regcache->registers |
| 319 | = XCALLOC (descr->sizeof_raw_registers, char); |
| 320 | regcache->register_valid_p |
| 321 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
| 322 | regcache->readonly_p = 1; |
| 323 | return regcache; |
| 324 | } |
| 325 | |
| 326 | void |
| 327 | regcache_xfree (struct regcache *regcache) |
| 328 | { |
| 329 | if (regcache == NULL) |
| 330 | return; |
| 331 | xfree (regcache->registers); |
| 332 | xfree (regcache->register_valid_p); |
| 333 | xfree (regcache); |
| 334 | } |
| 335 | |
| 336 | static void |
| 337 | do_regcache_xfree (void *data) |
| 338 | { |
| 339 | regcache_xfree (data); |
| 340 | } |
| 341 | |
| 342 | struct cleanup * |
| 343 | make_cleanup_regcache_xfree (struct regcache *regcache) |
| 344 | { |
| 345 | return make_cleanup (do_regcache_xfree, regcache); |
| 346 | } |
| 347 | |
| 348 | /* Return REGCACHE's architecture. */ |
| 349 | |
| 350 | struct gdbarch * |
| 351 | get_regcache_arch (const struct regcache *regcache) |
| 352 | { |
| 353 | return regcache->descr->gdbarch; |
| 354 | } |
| 355 | |
| 356 | /* Return a pointer to register REGNUM's buffer cache. */ |
| 357 | |
| 358 | static char * |
| 359 | register_buffer (const struct regcache *regcache, int regnum) |
| 360 | { |
| 361 | return regcache->registers + regcache->descr->register_offset[regnum]; |
| 362 | } |
| 363 | |
| 364 | void |
| 365 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
| 366 | void *src) |
| 367 | { |
| 368 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 369 | char buf[MAX_REGISTER_SIZE]; |
| 370 | int regnum; |
| 371 | /* The DST should be `read-only', if it wasn't then the save would |
| 372 | end up trying to write the register values back out to the |
| 373 | target. */ |
| 374 | gdb_assert (dst->readonly_p); |
| 375 | /* Clear the dest. */ |
| 376 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); |
| 377 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); |
| 378 | /* Copy over any registers (identified by their membership in the |
| 379 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
| 380 | NUM_PSEUDO_REGS) range is checked since some architectures need |
| 381 | to save/restore `cooked' registers that live in memory. */ |
| 382 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 383 | { |
| 384 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) |
| 385 | { |
| 386 | int valid = cooked_read (src, regnum, buf); |
| 387 | if (valid) |
| 388 | { |
| 389 | memcpy (register_buffer (dst, regnum), buf, |
| 390 | register_size (gdbarch, regnum)); |
| 391 | dst->register_valid_p[regnum] = 1; |
| 392 | } |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | void |
| 398 | regcache_restore (struct regcache *dst, |
| 399 | regcache_cooked_read_ftype *cooked_read, |
| 400 | void *src) |
| 401 | { |
| 402 | struct gdbarch *gdbarch = dst->descr->gdbarch; |
| 403 | char buf[MAX_REGISTER_SIZE]; |
| 404 | int regnum; |
| 405 | /* The dst had better not be read-only. If it is, the `restore' |
| 406 | doesn't make much sense. */ |
| 407 | gdb_assert (!dst->readonly_p); |
| 408 | /* Copy over any registers, being careful to only restore those that |
| 409 | were both saved and need to be restored. The full [0 .. NUM_REGS |
| 410 | + NUM_PSEUDO_REGS) range is checked since some architectures need |
| 411 | to save/restore `cooked' registers that live in memory. */ |
| 412 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
| 413 | { |
| 414 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
| 415 | { |
| 416 | int valid = cooked_read (src, regnum, buf); |
| 417 | if (valid) |
| 418 | regcache_cooked_write (dst, regnum, buf); |
| 419 | } |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | static int |
| 424 | do_cooked_read (void *src, int regnum, void *buf) |
| 425 | { |
| 426 | struct regcache *regcache = src; |
| 427 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
| 428 | /* Don't even think about fetching a register from a read-only |
| 429 | cache when the register isn't yet valid. There isn't a target |
| 430 | from which the register value can be fetched. */ |
| 431 | return 0; |
| 432 | regcache_cooked_read (regcache, regnum, buf); |
| 433 | return 1; |
| 434 | } |
| 435 | |
| 436 | |
| 437 | void |
| 438 | regcache_cpy (struct regcache *dst, struct regcache *src) |
| 439 | { |
| 440 | int i; |
| 441 | char *buf; |
| 442 | gdb_assert (src != NULL && dst != NULL); |
| 443 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 444 | gdb_assert (src != dst); |
| 445 | gdb_assert (src->readonly_p || dst->readonly_p); |
| 446 | if (!src->readonly_p) |
| 447 | regcache_save (dst, do_cooked_read, src); |
| 448 | else if (!dst->readonly_p) |
| 449 | regcache_restore (dst, do_cooked_read, src); |
| 450 | else |
| 451 | regcache_cpy_no_passthrough (dst, src); |
| 452 | } |
| 453 | |
| 454 | void |
| 455 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) |
| 456 | { |
| 457 | int i; |
| 458 | gdb_assert (src != NULL && dst != NULL); |
| 459 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); |
| 460 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough |
| 461 | move of data into the current_regcache(). Doing this would be |
| 462 | silly - it would mean that valid_p would be completly invalid. */ |
| 463 | gdb_assert (dst != current_regcache); |
| 464 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
| 465 | memcpy (dst->register_valid_p, src->register_valid_p, |
| 466 | dst->descr->sizeof_raw_register_valid_p); |
| 467 | } |
| 468 | |
| 469 | struct regcache * |
| 470 | regcache_dup (struct regcache *src) |
| 471 | { |
| 472 | struct regcache *newbuf; |
| 473 | gdb_assert (current_regcache != NULL); |
| 474 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 475 | regcache_cpy (newbuf, src); |
| 476 | return newbuf; |
| 477 | } |
| 478 | |
| 479 | struct regcache * |
| 480 | regcache_dup_no_passthrough (struct regcache *src) |
| 481 | { |
| 482 | struct regcache *newbuf; |
| 483 | gdb_assert (current_regcache != NULL); |
| 484 | newbuf = regcache_xmalloc (src->descr->gdbarch); |
| 485 | regcache_cpy_no_passthrough (newbuf, src); |
| 486 | return newbuf; |
| 487 | } |
| 488 | |
| 489 | int |
| 490 | regcache_valid_p (struct regcache *regcache, int regnum) |
| 491 | { |
| 492 | gdb_assert (regcache != NULL); |
| 493 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 494 | return regcache->register_valid_p[regnum]; |
| 495 | } |
| 496 | |
| 497 | char * |
| 498 | deprecated_grub_regcache_for_registers (struct regcache *regcache) |
| 499 | { |
| 500 | return regcache->registers; |
| 501 | } |
| 502 | |
| 503 | /* Global structure containing the current regcache. */ |
| 504 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and |
| 505 | deprecated_register_valid[] currently point into this structure. */ |
| 506 | struct regcache *current_regcache; |
| 507 | |
| 508 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
| 509 | recording if the register values have been changed (eg. by the |
| 510 | user). Therefore all registers must be written back to the |
| 511 | target when appropriate. */ |
| 512 | |
| 513 | /* REGISTERS contains the cached register values (in target byte order). */ |
| 514 | |
| 515 | char *deprecated_registers; |
| 516 | |
| 517 | /* DEPRECATED_REGISTER_VALID is 0 if the register needs to be fetched, |
| 518 | 1 if it has been fetched, and |
| 519 | -1 if the register value was not available. |
| 520 | |
| 521 | "Not available" indicates that the target is not not able to supply |
| 522 | the register at this state. The register may become available at a |
| 523 | later time (after the next resume). This often occures when GDB is |
| 524 | manipulating a target that contains only a snapshot of the entire |
| 525 | system being debugged - some of the registers in such a system may |
| 526 | not have been saved. */ |
| 527 | |
| 528 | signed char *deprecated_register_valid; |
| 529 | |
| 530 | /* The thread/process associated with the current set of registers. */ |
| 531 | |
| 532 | static ptid_t registers_ptid; |
| 533 | |
| 534 | /* |
| 535 | * FUNCTIONS: |
| 536 | */ |
| 537 | |
| 538 | /* REGISTER_CACHED() |
| 539 | |
| 540 | Returns 0 if the value is not in the cache (needs fetch). |
| 541 | >0 if the value is in the cache. |
| 542 | <0 if the value is permanently unavailable (don't ask again). */ |
| 543 | |
| 544 | int |
| 545 | register_cached (int regnum) |
| 546 | { |
| 547 | return deprecated_register_valid[regnum]; |
| 548 | } |
| 549 | |
| 550 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
| 551 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ |
| 552 | |
| 553 | void |
| 554 | set_register_cached (int regnum, int state) |
| 555 | { |
| 556 | gdb_assert (regnum >= 0); |
| 557 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); |
| 558 | current_regcache->register_valid_p[regnum] = state; |
| 559 | } |
| 560 | |
| 561 | /* Return whether register REGNUM is a real register. */ |
| 562 | |
| 563 | static int |
| 564 | real_register (int regnum) |
| 565 | { |
| 566 | return regnum >= 0 && regnum < NUM_REGS; |
| 567 | } |
| 568 | |
| 569 | /* Low level examining and depositing of registers. |
| 570 | |
| 571 | The caller is responsible for making sure that the inferior is |
| 572 | stopped before calling the fetching routines, or it will get |
| 573 | garbage. (a change from GDB version 3, in which the caller got the |
| 574 | value from the last stop). */ |
| 575 | |
| 576 | /* REGISTERS_CHANGED () |
| 577 | |
| 578 | Indicate that registers may have changed, so invalidate the cache. */ |
| 579 | |
| 580 | void |
| 581 | registers_changed (void) |
| 582 | { |
| 583 | int i; |
| 584 | |
| 585 | registers_ptid = pid_to_ptid (-1); |
| 586 | |
| 587 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 588 | a builtin alloca. This particular call is used to clean up |
| 589 | areas allocated by low level target code which may build up |
| 590 | during lengthy interactions between gdb and the target before |
| 591 | gdb gives control to the user (ie watchpoints). */ |
| 592 | alloca (0); |
| 593 | |
| 594 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
| 595 | set_register_cached (i, 0); |
| 596 | |
| 597 | if (registers_changed_hook) |
| 598 | registers_changed_hook (); |
| 599 | } |
| 600 | |
| 601 | /* DEPRECATED_REGISTERS_FETCHED () |
| 602 | |
| 603 | Indicate that all registers have been fetched, so mark them all valid. */ |
| 604 | |
| 605 | /* NOTE: cagney/2001-12-04: This function does not set valid on the |
| 606 | pseudo-register range since pseudo registers are always supplied |
| 607 | using supply_register(). */ |
| 608 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target |
| 609 | code was blatting the registers[] array and then calling this. |
| 610 | Since targets should only be using supply_register() the need for |
| 611 | this function/hack is eliminated. */ |
| 612 | |
| 613 | void |
| 614 | deprecated_registers_fetched (void) |
| 615 | { |
| 616 | int i; |
| 617 | |
| 618 | for (i = 0; i < NUM_REGS; i++) |
| 619 | set_register_cached (i, 1); |
| 620 | /* Do not assume that the pseudo-regs have also been fetched. |
| 621 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
| 622 | } |
| 623 | |
| 624 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
| 625 | are generally a *BAD* idea. They are inefficient because they need |
| 626 | to check for partial updates, which can only be done by scanning |
| 627 | through all of the registers and seeing if the bytes that are being |
| 628 | read/written fall inside of an invalid register. [The main reason |
| 629 | this is necessary is that register sizes can vary, so a simple |
| 630 | index won't suffice.] It is far better to call read_register_gen |
| 631 | and write_register_gen if you want to get at the raw register |
| 632 | contents, as it only takes a regnum as an argument, and therefore |
| 633 | can't do a partial register update. |
| 634 | |
| 635 | Prior to the recent fixes to check for partial updates, both read |
| 636 | and deprecated_write_register_bytes always checked to see if any |
| 637 | registers were stale, and then called target_fetch_registers (-1) |
| 638 | to update the whole set. This caused really slowed things down for |
| 639 | remote targets. */ |
| 640 | |
| 641 | /* Copy INLEN bytes of consecutive data from registers |
| 642 | starting with the INREGBYTE'th byte of register data |
| 643 | into memory at MYADDR. */ |
| 644 | |
| 645 | void |
| 646 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
| 647 | { |
| 648 | int in_end = in_start + in_len; |
| 649 | int regnum; |
| 650 | char reg_buf[MAX_REGISTER_SIZE]; |
| 651 | |
| 652 | /* See if we are trying to read bytes from out-of-date registers. If so, |
| 653 | update just those registers. */ |
| 654 | |
| 655 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| 656 | { |
| 657 | int reg_start; |
| 658 | int reg_end; |
| 659 | int reg_len; |
| 660 | int start; |
| 661 | int end; |
| 662 | int byte; |
| 663 | |
| 664 | reg_start = DEPRECATED_REGISTER_BYTE (regnum); |
| 665 | reg_len = DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 666 | reg_end = reg_start + reg_len; |
| 667 | |
| 668 | if (reg_end <= in_start || in_end <= reg_start) |
| 669 | /* The range the user wants to read doesn't overlap with regnum. */ |
| 670 | continue; |
| 671 | |
| 672 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
| 673 | /* Force the cache to fetch the entire register. */ |
| 674 | deprecated_read_register_gen (regnum, reg_buf); |
| 675 | else |
| 676 | /* Legacy note: even though this register is ``invalid'' we |
| 677 | still need to return something. It would appear that some |
| 678 | code relies on apparent gaps in the register array also |
| 679 | being returned. */ |
| 680 | /* FIXME: cagney/2001-08-18: This is just silly. It defeats |
| 681 | the entire register read/write flow of control. Must |
| 682 | resist temptation to return 0xdeadbeef. */ |
| 683 | memcpy (reg_buf, &deprecated_registers[reg_start], reg_len); |
| 684 | |
| 685 | /* Legacy note: This function, for some reason, allows a NULL |
| 686 | input buffer. If the buffer is NULL, the registers are still |
| 687 | fetched, just the final transfer is skipped. */ |
| 688 | if (in_buf == NULL) |
| 689 | continue; |
| 690 | |
| 691 | /* start = max (reg_start, in_start) */ |
| 692 | if (reg_start > in_start) |
| 693 | start = reg_start; |
| 694 | else |
| 695 | start = in_start; |
| 696 | |
| 697 | /* end = min (reg_end, in_end) */ |
| 698 | if (reg_end < in_end) |
| 699 | end = reg_end; |
| 700 | else |
| 701 | end = in_end; |
| 702 | |
| 703 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ |
| 704 | for (byte = start; byte < end; byte++) |
| 705 | { |
| 706 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
| 707 | } |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | /* Read register REGNUM into memory at MYADDR, which must be large |
| 712 | enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the |
| 713 | register is known to be the size of a CORE_ADDR or smaller, |
| 714 | read_register can be used instead. */ |
| 715 | |
| 716 | static void |
| 717 | legacy_read_register_gen (int regnum, char *myaddr) |
| 718 | { |
| 719 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 720 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 721 | { |
| 722 | registers_changed (); |
| 723 | registers_ptid = inferior_ptid; |
| 724 | } |
| 725 | |
| 726 | if (!register_cached (regnum)) |
| 727 | target_fetch_registers (regnum); |
| 728 | |
| 729 | memcpy (myaddr, register_buffer (current_regcache, regnum), |
| 730 | DEPRECATED_REGISTER_RAW_SIZE (regnum)); |
| 731 | } |
| 732 | |
| 733 | void |
| 734 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
| 735 | { |
| 736 | gdb_assert (regcache != NULL && buf != NULL); |
| 737 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 738 | if (regcache->descr->legacy_p |
| 739 | && !regcache->readonly_p) |
| 740 | { |
| 741 | gdb_assert (regcache == current_regcache); |
| 742 | /* For moment, just use underlying legacy code. Ulgh!!! This |
| 743 | silently and very indirectly updates the regcache's regcache |
| 744 | via the global deprecated_register_valid[]. */ |
| 745 | legacy_read_register_gen (regnum, buf); |
| 746 | return; |
| 747 | } |
| 748 | /* Make certain that the register cache is up-to-date with respect |
| 749 | to the current thread. This switching shouldn't be necessary |
| 750 | only there is still only one target side register cache. Sigh! |
| 751 | On the bright side, at least there is a regcache object. */ |
| 752 | if (!regcache->readonly_p) |
| 753 | { |
| 754 | gdb_assert (regcache == current_regcache); |
| 755 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 756 | { |
| 757 | registers_changed (); |
| 758 | registers_ptid = inferior_ptid; |
| 759 | } |
| 760 | if (!register_cached (regnum)) |
| 761 | target_fetch_registers (regnum); |
| 762 | } |
| 763 | /* Copy the value directly into the register cache. */ |
| 764 | memcpy (buf, register_buffer (regcache, regnum), |
| 765 | regcache->descr->sizeof_register[regnum]); |
| 766 | } |
| 767 | |
| 768 | void |
| 769 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
| 770 | { |
| 771 | char *buf; |
| 772 | gdb_assert (regcache != NULL); |
| 773 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 774 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 775 | regcache_raw_read (regcache, regnum, buf); |
| 776 | (*val) = extract_signed_integer (buf, |
| 777 | regcache->descr->sizeof_register[regnum]); |
| 778 | } |
| 779 | |
| 780 | void |
| 781 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
| 782 | ULONGEST *val) |
| 783 | { |
| 784 | char *buf; |
| 785 | gdb_assert (regcache != NULL); |
| 786 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 787 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 788 | regcache_raw_read (regcache, regnum, buf); |
| 789 | (*val) = extract_unsigned_integer (buf, |
| 790 | regcache->descr->sizeof_register[regnum]); |
| 791 | } |
| 792 | |
| 793 | void |
| 794 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) |
| 795 | { |
| 796 | void *buf; |
| 797 | gdb_assert (regcache != NULL); |
| 798 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 799 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 800 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 801 | regcache_raw_write (regcache, regnum, buf); |
| 802 | } |
| 803 | |
| 804 | void |
| 805 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, |
| 806 | ULONGEST val) |
| 807 | { |
| 808 | void *buf; |
| 809 | gdb_assert (regcache != NULL); |
| 810 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); |
| 811 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 812 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 813 | regcache_raw_write (regcache, regnum, buf); |
| 814 | } |
| 815 | |
| 816 | void |
| 817 | deprecated_read_register_gen (int regnum, char *buf) |
| 818 | { |
| 819 | gdb_assert (current_regcache != NULL); |
| 820 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); |
| 821 | if (current_regcache->descr->legacy_p) |
| 822 | { |
| 823 | legacy_read_register_gen (regnum, buf); |
| 824 | return; |
| 825 | } |
| 826 | regcache_cooked_read (current_regcache, regnum, buf); |
| 827 | } |
| 828 | |
| 829 | void |
| 830 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
| 831 | { |
| 832 | gdb_assert (regnum >= 0); |
| 833 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 834 | if (regnum < regcache->descr->nr_raw_registers) |
| 835 | regcache_raw_read (regcache, regnum, buf); |
| 836 | else if (regcache->readonly_p |
| 837 | && regnum < regcache->descr->nr_cooked_registers |
| 838 | && regcache->register_valid_p[regnum]) |
| 839 | /* Read-only register cache, perhaphs the cooked value was cached? */ |
| 840 | memcpy (buf, register_buffer (regcache, regnum), |
| 841 | regcache->descr->sizeof_register[regnum]); |
| 842 | else |
| 843 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
| 844 | regnum, buf); |
| 845 | } |
| 846 | |
| 847 | void |
| 848 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
| 849 | LONGEST *val) |
| 850 | { |
| 851 | char *buf; |
| 852 | gdb_assert (regcache != NULL); |
| 853 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 854 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 855 | regcache_cooked_read (regcache, regnum, buf); |
| 856 | (*val) = extract_signed_integer (buf, |
| 857 | regcache->descr->sizeof_register[regnum]); |
| 858 | } |
| 859 | |
| 860 | void |
| 861 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
| 862 | ULONGEST *val) |
| 863 | { |
| 864 | char *buf; |
| 865 | gdb_assert (regcache != NULL); |
| 866 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
| 867 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 868 | regcache_cooked_read (regcache, regnum, buf); |
| 869 | (*val) = extract_unsigned_integer (buf, |
| 870 | regcache->descr->sizeof_register[regnum]); |
| 871 | } |
| 872 | |
| 873 | void |
| 874 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, |
| 875 | LONGEST val) |
| 876 | { |
| 877 | void *buf; |
| 878 | gdb_assert (regcache != NULL); |
| 879 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 880 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 881 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 882 | regcache_cooked_write (regcache, regnum, buf); |
| 883 | } |
| 884 | |
| 885 | void |
| 886 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, |
| 887 | ULONGEST val) |
| 888 | { |
| 889 | void *buf; |
| 890 | gdb_assert (regcache != NULL); |
| 891 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); |
| 892 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
| 893 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); |
| 894 | regcache_cooked_write (regcache, regnum, buf); |
| 895 | } |
| 896 | |
| 897 | /* Write register REGNUM at MYADDR to the target. MYADDR points at |
| 898 | REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */ |
| 899 | |
| 900 | static void |
| 901 | legacy_write_register_gen (int regnum, const void *myaddr) |
| 902 | { |
| 903 | int size; |
| 904 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
| 905 | |
| 906 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 907 | change the registers array if something writes to this register. */ |
| 908 | if (CANNOT_STORE_REGISTER (regnum)) |
| 909 | return; |
| 910 | |
| 911 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 912 | { |
| 913 | registers_changed (); |
| 914 | registers_ptid = inferior_ptid; |
| 915 | } |
| 916 | |
| 917 | size = DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 918 | |
| 919 | if (real_register (regnum)) |
| 920 | { |
| 921 | /* If we have a valid copy of the register, and new value == old |
| 922 | value, then don't bother doing the actual store. */ |
| 923 | if (register_cached (regnum) |
| 924 | && (memcmp (register_buffer (current_regcache, regnum), myaddr, size) |
| 925 | == 0)) |
| 926 | return; |
| 927 | else |
| 928 | target_prepare_to_store (); |
| 929 | } |
| 930 | |
| 931 | memcpy (register_buffer (current_regcache, regnum), myaddr, size); |
| 932 | |
| 933 | set_register_cached (regnum, 1); |
| 934 | target_store_registers (regnum); |
| 935 | } |
| 936 | |
| 937 | void |
| 938 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
| 939 | { |
| 940 | gdb_assert (regcache != NULL && buf != NULL); |
| 941 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 942 | gdb_assert (!regcache->readonly_p); |
| 943 | |
| 944 | if (regcache->descr->legacy_p) |
| 945 | { |
| 946 | /* For moment, just use underlying legacy code. Ulgh!!! This |
| 947 | silently and very indirectly updates the regcache's buffers |
| 948 | via the globals deprecated_register_valid[] and registers[]. */ |
| 949 | gdb_assert (regcache == current_regcache); |
| 950 | legacy_write_register_gen (regnum, buf); |
| 951 | return; |
| 952 | } |
| 953 | |
| 954 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| 955 | change the registers array if something writes to this register. */ |
| 956 | if (CANNOT_STORE_REGISTER (regnum)) |
| 957 | return; |
| 958 | |
| 959 | /* Make certain that the correct cache is selected. */ |
| 960 | gdb_assert (regcache == current_regcache); |
| 961 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
| 962 | { |
| 963 | registers_changed (); |
| 964 | registers_ptid = inferior_ptid; |
| 965 | } |
| 966 | |
| 967 | /* If we have a valid copy of the register, and new value == old |
| 968 | value, then don't bother doing the actual store. */ |
| 969 | if (regcache_valid_p (regcache, regnum) |
| 970 | && (memcmp (register_buffer (regcache, regnum), buf, |
| 971 | regcache->descr->sizeof_register[regnum]) == 0)) |
| 972 | return; |
| 973 | |
| 974 | target_prepare_to_store (); |
| 975 | memcpy (register_buffer (regcache, regnum), buf, |
| 976 | regcache->descr->sizeof_register[regnum]); |
| 977 | regcache->register_valid_p[regnum] = 1; |
| 978 | target_store_registers (regnum); |
| 979 | } |
| 980 | |
| 981 | void |
| 982 | deprecated_write_register_gen (int regnum, char *buf) |
| 983 | { |
| 984 | gdb_assert (current_regcache != NULL); |
| 985 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); |
| 986 | if (current_regcache->descr->legacy_p) |
| 987 | { |
| 988 | legacy_write_register_gen (regnum, buf); |
| 989 | return; |
| 990 | } |
| 991 | regcache_cooked_write (current_regcache, regnum, buf); |
| 992 | } |
| 993 | |
| 994 | void |
| 995 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
| 996 | { |
| 997 | gdb_assert (regnum >= 0); |
| 998 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
| 999 | if (regnum < regcache->descr->nr_raw_registers) |
| 1000 | regcache_raw_write (regcache, regnum, buf); |
| 1001 | else |
| 1002 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
| 1003 | regnum, buf); |
| 1004 | } |
| 1005 | |
| 1006 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
| 1007 | into registers starting with the MYREGSTART'th byte of register data. */ |
| 1008 | |
| 1009 | void |
| 1010 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
| 1011 | { |
| 1012 | int myregend = myregstart + inlen; |
| 1013 | int regnum; |
| 1014 | |
| 1015 | target_prepare_to_store (); |
| 1016 | |
| 1017 | /* Scan through the registers updating any that are covered by the |
| 1018 | range myregstart<=>myregend using write_register_gen, which does |
| 1019 | nice things like handling threads, and avoiding updates when the |
| 1020 | new and old contents are the same. */ |
| 1021 | |
| 1022 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| 1023 | { |
| 1024 | int regstart, regend; |
| 1025 | |
| 1026 | regstart = DEPRECATED_REGISTER_BYTE (regnum); |
| 1027 | regend = regstart + DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 1028 | |
| 1029 | /* Is this register completely outside the range the user is writing? */ |
| 1030 | if (myregend <= regstart || regend <= myregstart) |
| 1031 | /* do nothing */ ; |
| 1032 | |
| 1033 | /* Is this register completely within the range the user is writing? */ |
| 1034 | else if (myregstart <= regstart && regend <= myregend) |
| 1035 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
| 1036 | |
| 1037 | /* The register partially overlaps the range being written. */ |
| 1038 | else |
| 1039 | { |
| 1040 | char regbuf[MAX_REGISTER_SIZE]; |
| 1041 | /* What's the overlap between this register's bytes and |
| 1042 | those the caller wants to write? */ |
| 1043 | int overlapstart = max (regstart, myregstart); |
| 1044 | int overlapend = min (regend, myregend); |
| 1045 | |
| 1046 | /* We may be doing a partial update of an invalid register. |
| 1047 | Update it from the target before scribbling on it. */ |
| 1048 | deprecated_read_register_gen (regnum, regbuf); |
| 1049 | |
| 1050 | memcpy (&deprecated_registers[overlapstart], |
| 1051 | myaddr + (overlapstart - myregstart), |
| 1052 | overlapend - overlapstart); |
| 1053 | |
| 1054 | target_store_registers (regnum); |
| 1055 | } |
| 1056 | } |
| 1057 | } |
| 1058 | |
| 1059 | /* Perform a partial register transfer using a read, modify, write |
| 1060 | operation. */ |
| 1061 | |
| 1062 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, |
| 1063 | void *buf); |
| 1064 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, |
| 1065 | const void *buf); |
| 1066 | |
| 1067 | static void |
| 1068 | regcache_xfer_part (struct regcache *regcache, int regnum, |
| 1069 | int offset, int len, void *in, const void *out, |
| 1070 | regcache_read_ftype *read, regcache_write_ftype *write) |
| 1071 | { |
| 1072 | struct regcache_descr *descr = regcache->descr; |
| 1073 | bfd_byte reg[MAX_REGISTER_SIZE]; |
| 1074 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
| 1075 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); |
| 1076 | /* Something to do? */ |
| 1077 | if (offset + len == 0) |
| 1078 | return; |
| 1079 | /* Read (when needed) ... */ |
| 1080 | if (in != NULL |
| 1081 | || offset > 0 |
| 1082 | || offset + len < descr->sizeof_register[regnum]) |
| 1083 | { |
| 1084 | gdb_assert (read != NULL); |
| 1085 | read (regcache, regnum, reg); |
| 1086 | } |
| 1087 | /* ... modify ... */ |
| 1088 | if (in != NULL) |
| 1089 | memcpy (in, reg + offset, len); |
| 1090 | if (out != NULL) |
| 1091 | memcpy (reg + offset, out, len); |
| 1092 | /* ... write (when needed). */ |
| 1093 | if (out != NULL) |
| 1094 | { |
| 1095 | gdb_assert (write != NULL); |
| 1096 | write (regcache, regnum, reg); |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | void |
| 1101 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
| 1102 | int offset, int len, void *buf) |
| 1103 | { |
| 1104 | struct regcache_descr *descr = regcache->descr; |
| 1105 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 1106 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 1107 | regcache_raw_read, regcache_raw_write); |
| 1108 | } |
| 1109 | |
| 1110 | void |
| 1111 | regcache_raw_write_part (struct regcache *regcache, int regnum, |
| 1112 | int offset, int len, const void *buf) |
| 1113 | { |
| 1114 | struct regcache_descr *descr = regcache->descr; |
| 1115 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
| 1116 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 1117 | regcache_raw_read, regcache_raw_write); |
| 1118 | } |
| 1119 | |
| 1120 | void |
| 1121 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
| 1122 | int offset, int len, void *buf) |
| 1123 | { |
| 1124 | struct regcache_descr *descr = regcache->descr; |
| 1125 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 1126 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, |
| 1127 | regcache_cooked_read, regcache_cooked_write); |
| 1128 | } |
| 1129 | |
| 1130 | void |
| 1131 | regcache_cooked_write_part (struct regcache *regcache, int regnum, |
| 1132 | int offset, int len, const void *buf) |
| 1133 | { |
| 1134 | struct regcache_descr *descr = regcache->descr; |
| 1135 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 1136 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, |
| 1137 | regcache_cooked_read, regcache_cooked_write); |
| 1138 | } |
| 1139 | |
| 1140 | /* Hack to keep code that view the register buffer as raw bytes |
| 1141 | working. */ |
| 1142 | |
| 1143 | int |
| 1144 | register_offset_hack (struct gdbarch *gdbarch, int regnum) |
| 1145 | { |
| 1146 | struct regcache_descr *descr = regcache_descr (gdbarch); |
| 1147 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| 1148 | return descr->register_offset[regnum]; |
| 1149 | } |
| 1150 | |
| 1151 | /* Return the contents of register REGNUM as an unsigned integer. */ |
| 1152 | |
| 1153 | ULONGEST |
| 1154 | read_register (int regnum) |
| 1155 | { |
| 1156 | char *buf = alloca (DEPRECATED_REGISTER_RAW_SIZE (regnum)); |
| 1157 | deprecated_read_register_gen (regnum, buf); |
| 1158 | return (extract_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (regnum))); |
| 1159 | } |
| 1160 | |
| 1161 | ULONGEST |
| 1162 | read_register_pid (int regnum, ptid_t ptid) |
| 1163 | { |
| 1164 | ptid_t save_ptid; |
| 1165 | int save_pid; |
| 1166 | CORE_ADDR retval; |
| 1167 | |
| 1168 | if (ptid_equal (ptid, inferior_ptid)) |
| 1169 | return read_register (regnum); |
| 1170 | |
| 1171 | save_ptid = inferior_ptid; |
| 1172 | |
| 1173 | inferior_ptid = ptid; |
| 1174 | |
| 1175 | retval = read_register (regnum); |
| 1176 | |
| 1177 | inferior_ptid = save_ptid; |
| 1178 | |
| 1179 | return retval; |
| 1180 | } |
| 1181 | |
| 1182 | /* Store VALUE into the raw contents of register number REGNUM. */ |
| 1183 | |
| 1184 | void |
| 1185 | write_register (int regnum, LONGEST val) |
| 1186 | { |
| 1187 | void *buf; |
| 1188 | int size; |
| 1189 | size = DEPRECATED_REGISTER_RAW_SIZE (regnum); |
| 1190 | buf = alloca (size); |
| 1191 | store_signed_integer (buf, size, (LONGEST) val); |
| 1192 | deprecated_write_register_gen (regnum, buf); |
| 1193 | } |
| 1194 | |
| 1195 | void |
| 1196 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
| 1197 | { |
| 1198 | ptid_t save_ptid; |
| 1199 | |
| 1200 | if (ptid_equal (ptid, inferior_ptid)) |
| 1201 | { |
| 1202 | write_register (regnum, val); |
| 1203 | return; |
| 1204 | } |
| 1205 | |
| 1206 | save_ptid = inferior_ptid; |
| 1207 | |
| 1208 | inferior_ptid = ptid; |
| 1209 | |
| 1210 | write_register (regnum, val); |
| 1211 | |
| 1212 | inferior_ptid = save_ptid; |
| 1213 | } |
| 1214 | |
| 1215 | /* FIXME: kettenis/20030828: We should get rid of supply_register and |
| 1216 | regcache_collect in favour of regcache_raw_supply and |
| 1217 | regcache_raw_collect. */ |
| 1218 | |
| 1219 | /* SUPPLY_REGISTER() |
| 1220 | |
| 1221 | Record that register REGNUM contains VAL. This is used when the |
| 1222 | value is obtained from the inferior or core dump, so there is no |
| 1223 | need to store the value there. |
| 1224 | |
| 1225 | If VAL is a NULL pointer, then it's probably an unsupported register. |
| 1226 | We just set its value to all zeros. We might want to record this |
| 1227 | fact, and report it to the users of read_register and friends. */ |
| 1228 | |
| 1229 | void |
| 1230 | supply_register (int regnum, const void *val) |
| 1231 | { |
| 1232 | regcache_raw_supply (current_regcache, regnum, val); |
| 1233 | |
| 1234 | /* On some architectures, e.g. HPPA, there are a few stray bits in |
| 1235 | some registers, that the rest of the code would like to ignore. */ |
| 1236 | |
| 1237 | /* NOTE: cagney/2001-03-16: The macro CLEAN_UP_REGISTER_VALUE is |
| 1238 | going to be deprecated. Instead architectures will leave the raw |
| 1239 | register value as is and instead clean things up as they pass |
| 1240 | through the method gdbarch_pseudo_register_read() clean up the |
| 1241 | values. */ |
| 1242 | |
| 1243 | #ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE |
| 1244 | DEPRECATED_CLEAN_UP_REGISTER_VALUE \ |
| 1245 | (regnum, register_buffer (current_regcache, regnum)); |
| 1246 | #endif |
| 1247 | } |
| 1248 | |
| 1249 | void |
| 1250 | regcache_collect (int regnum, void *buf) |
| 1251 | { |
| 1252 | regcache_raw_collect (current_regcache, regnum, buf); |
| 1253 | } |
| 1254 | |
| 1255 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
| 1256 | |
| 1257 | void |
| 1258 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
| 1259 | { |
| 1260 | void *regbuf; |
| 1261 | size_t size; |
| 1262 | |
| 1263 | gdb_assert (regcache != NULL); |
| 1264 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 1265 | gdb_assert (!regcache->readonly_p); |
| 1266 | |
| 1267 | /* FIXME: kettenis/20030828: It shouldn't be necessary to handle |
| 1268 | CURRENT_REGCACHE specially here. */ |
| 1269 | if (regcache == current_regcache |
| 1270 | && !ptid_equal (registers_ptid, inferior_ptid)) |
| 1271 | { |
| 1272 | registers_changed (); |
| 1273 | registers_ptid = inferior_ptid; |
| 1274 | } |
| 1275 | |
| 1276 | regbuf = register_buffer (regcache, regnum); |
| 1277 | size = regcache->descr->sizeof_register[regnum]; |
| 1278 | |
| 1279 | if (buf) |
| 1280 | memcpy (regbuf, buf, size); |
| 1281 | else |
| 1282 | memset (regbuf, 0, size); |
| 1283 | |
| 1284 | /* Mark the register as cached. */ |
| 1285 | regcache->register_valid_p[regnum] = 1; |
| 1286 | } |
| 1287 | |
| 1288 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
| 1289 | |
| 1290 | void |
| 1291 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
| 1292 | { |
| 1293 | const void *regbuf; |
| 1294 | size_t size; |
| 1295 | |
| 1296 | gdb_assert (regcache != NULL && buf != NULL); |
| 1297 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
| 1298 | |
| 1299 | regbuf = register_buffer (regcache, regnum); |
| 1300 | size = regcache->descr->sizeof_register[regnum]; |
| 1301 | memcpy (buf, regbuf, size); |
| 1302 | } |
| 1303 | |
| 1304 | |
| 1305 | /* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special |
| 1306 | handling for registers PC, SP, and FP. */ |
| 1307 | |
| 1308 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc(), |
| 1309 | read_sp(), and deprecated_read_fp(), will eventually be replaced by |
| 1310 | per-frame methods. Instead of relying on the global INFERIOR_PTID, |
| 1311 | they will use the contextual information provided by the FRAME. |
| 1312 | These functions do not belong in the register cache. */ |
| 1313 | |
| 1314 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
| 1315 | write_pc_pid(), write_pc(), and deprecated_read_fp(), all need to |
| 1316 | be replaced by something that does not rely on global state. But |
| 1317 | what? */ |
| 1318 | |
| 1319 | CORE_ADDR |
| 1320 | read_pc_pid (ptid_t ptid) |
| 1321 | { |
| 1322 | ptid_t saved_inferior_ptid; |
| 1323 | CORE_ADDR pc_val; |
| 1324 | |
| 1325 | /* In case ptid != inferior_ptid. */ |
| 1326 | saved_inferior_ptid = inferior_ptid; |
| 1327 | inferior_ptid = ptid; |
| 1328 | |
| 1329 | if (TARGET_READ_PC_P ()) |
| 1330 | pc_val = TARGET_READ_PC (ptid); |
| 1331 | /* Else use per-frame method on get_current_frame. */ |
| 1332 | else if (PC_REGNUM >= 0) |
| 1333 | { |
| 1334 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); |
| 1335 | CORE_ADDR pc_val = ADDR_BITS_REMOVE (raw_val); |
| 1336 | return pc_val; |
| 1337 | } |
| 1338 | else |
| 1339 | internal_error (__FILE__, __LINE__, "read_pc_pid: Unable to find PC"); |
| 1340 | |
| 1341 | inferior_ptid = saved_inferior_ptid; |
| 1342 | return pc_val; |
| 1343 | } |
| 1344 | |
| 1345 | CORE_ADDR |
| 1346 | read_pc (void) |
| 1347 | { |
| 1348 | return read_pc_pid (inferior_ptid); |
| 1349 | } |
| 1350 | |
| 1351 | void |
| 1352 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
| 1353 | { |
| 1354 | #ifdef PC_REGNUM |
| 1355 | if (PC_REGNUM >= 0) |
| 1356 | write_register_pid (PC_REGNUM, pc, ptid); |
| 1357 | if (DEPRECATED_NPC_REGNUM >= 0) |
| 1358 | write_register_pid (DEPRECATED_NPC_REGNUM, pc + 4, ptid); |
| 1359 | #else |
| 1360 | internal_error (__FILE__, __LINE__, |
| 1361 | "generic_target_write_pc"); |
| 1362 | #endif |
| 1363 | } |
| 1364 | |
| 1365 | void |
| 1366 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
| 1367 | { |
| 1368 | ptid_t saved_inferior_ptid; |
| 1369 | |
| 1370 | /* In case ptid != inferior_ptid. */ |
| 1371 | saved_inferior_ptid = inferior_ptid; |
| 1372 | inferior_ptid = ptid; |
| 1373 | |
| 1374 | TARGET_WRITE_PC (pc, ptid); |
| 1375 | |
| 1376 | inferior_ptid = saved_inferior_ptid; |
| 1377 | } |
| 1378 | |
| 1379 | void |
| 1380 | write_pc (CORE_ADDR pc) |
| 1381 | { |
| 1382 | write_pc_pid (pc, inferior_ptid); |
| 1383 | } |
| 1384 | |
| 1385 | /* Cope with strage ways of getting to the stack and frame pointers */ |
| 1386 | |
| 1387 | CORE_ADDR |
| 1388 | read_sp (void) |
| 1389 | { |
| 1390 | if (TARGET_READ_SP_P ()) |
| 1391 | return TARGET_READ_SP (); |
| 1392 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
| 1393 | return get_frame_sp (get_current_frame ()); |
| 1394 | else if (SP_REGNUM >= 0) |
| 1395 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
| 1396 | about the architecture so put it at the end. */ |
| 1397 | return read_register (SP_REGNUM); |
| 1398 | internal_error (__FILE__, __LINE__, "read_sp: Unable to find SP"); |
| 1399 | } |
| 1400 | |
| 1401 | void |
| 1402 | deprecated_write_sp (CORE_ADDR val) |
| 1403 | { |
| 1404 | gdb_assert (SP_REGNUM >= 0); |
| 1405 | write_register (SP_REGNUM, val); |
| 1406 | } |
| 1407 | |
| 1408 | CORE_ADDR |
| 1409 | deprecated_read_fp (void) |
| 1410 | { |
| 1411 | if (DEPRECATED_TARGET_READ_FP_P ()) |
| 1412 | return DEPRECATED_TARGET_READ_FP (); |
| 1413 | else if (DEPRECATED_FP_REGNUM >= 0) |
| 1414 | return read_register (DEPRECATED_FP_REGNUM); |
| 1415 | else |
| 1416 | internal_error (__FILE__, __LINE__, "deprecated_read_fp"); |
| 1417 | } |
| 1418 | |
| 1419 | static void |
| 1420 | reg_flush_command (char *command, int from_tty) |
| 1421 | { |
| 1422 | /* Force-flush the register cache. */ |
| 1423 | registers_changed (); |
| 1424 | if (from_tty) |
| 1425 | printf_filtered ("Register cache flushed.\n"); |
| 1426 | } |
| 1427 | |
| 1428 | static void |
| 1429 | build_regcache (void) |
| 1430 | { |
| 1431 | current_regcache = regcache_xmalloc (current_gdbarch); |
| 1432 | current_regcache->readonly_p = 0; |
| 1433 | deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache); |
| 1434 | deprecated_register_valid = current_regcache->register_valid_p; |
| 1435 | } |
| 1436 | |
| 1437 | static void |
| 1438 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, |
| 1439 | const unsigned char *buf, long len) |
| 1440 | { |
| 1441 | int i; |
| 1442 | switch (endian) |
| 1443 | { |
| 1444 | case BFD_ENDIAN_BIG: |
| 1445 | for (i = 0; i < len; i++) |
| 1446 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 1447 | break; |
| 1448 | case BFD_ENDIAN_LITTLE: |
| 1449 | for (i = len - 1; i >= 0; i--) |
| 1450 | fprintf_unfiltered (file, "%02x", buf[i]); |
| 1451 | break; |
| 1452 | default: |
| 1453 | internal_error (__FILE__, __LINE__, "Bad switch"); |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | enum regcache_dump_what |
| 1458 | { |
| 1459 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
| 1460 | }; |
| 1461 | |
| 1462 | static void |
| 1463 | regcache_dump (struct regcache *regcache, struct ui_file *file, |
| 1464 | enum regcache_dump_what what_to_dump) |
| 1465 | { |
| 1466 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 1467 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
| 1468 | int regnum; |
| 1469 | int footnote_nr = 0; |
| 1470 | int footnote_register_size = 0; |
| 1471 | int footnote_register_offset = 0; |
| 1472 | int footnote_register_type_name_null = 0; |
| 1473 | long register_offset = 0; |
| 1474 | unsigned char buf[MAX_REGISTER_SIZE]; |
| 1475 | |
| 1476 | #if 0 |
| 1477 | fprintf_unfiltered (file, "legacy_p %d\n", regcache->descr->legacy_p); |
| 1478 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
| 1479 | regcache->descr->nr_raw_registers); |
| 1480 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", |
| 1481 | regcache->descr->nr_cooked_registers); |
| 1482 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", |
| 1483 | regcache->descr->sizeof_raw_registers); |
| 1484 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", |
| 1485 | regcache->descr->sizeof_raw_register_valid_p); |
| 1486 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
| 1487 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); |
| 1488 | #endif |
| 1489 | |
| 1490 | gdb_assert (regcache->descr->nr_cooked_registers |
| 1491 | == (NUM_REGS + NUM_PSEUDO_REGS)); |
| 1492 | |
| 1493 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) |
| 1494 | { |
| 1495 | /* Name. */ |
| 1496 | if (regnum < 0) |
| 1497 | fprintf_unfiltered (file, " %-10s", "Name"); |
| 1498 | else |
| 1499 | { |
| 1500 | const char *p = REGISTER_NAME (regnum); |
| 1501 | if (p == NULL) |
| 1502 | p = ""; |
| 1503 | else if (p[0] == '\0') |
| 1504 | p = "''"; |
| 1505 | fprintf_unfiltered (file, " %-10s", p); |
| 1506 | } |
| 1507 | |
| 1508 | /* Number. */ |
| 1509 | if (regnum < 0) |
| 1510 | fprintf_unfiltered (file, " %4s", "Nr"); |
| 1511 | else |
| 1512 | fprintf_unfiltered (file, " %4d", regnum); |
| 1513 | |
| 1514 | /* Relative number. */ |
| 1515 | if (regnum < 0) |
| 1516 | fprintf_unfiltered (file, " %4s", "Rel"); |
| 1517 | else if (regnum < NUM_REGS) |
| 1518 | fprintf_unfiltered (file, " %4d", regnum); |
| 1519 | else |
| 1520 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); |
| 1521 | |
| 1522 | /* Offset. */ |
| 1523 | if (regnum < 0) |
| 1524 | fprintf_unfiltered (file, " %6s ", "Offset"); |
| 1525 | else |
| 1526 | { |
| 1527 | fprintf_unfiltered (file, " %6ld", |
| 1528 | regcache->descr->register_offset[regnum]); |
| 1529 | if (register_offset != regcache->descr->register_offset[regnum] |
| 1530 | || register_offset != DEPRECATED_REGISTER_BYTE (regnum) |
| 1531 | || (regnum > 0 |
| 1532 | && (regcache->descr->register_offset[regnum] |
| 1533 | != (regcache->descr->register_offset[regnum - 1] |
| 1534 | + regcache->descr->sizeof_register[regnum - 1]))) |
| 1535 | ) |
| 1536 | { |
| 1537 | if (!footnote_register_offset) |
| 1538 | footnote_register_offset = ++footnote_nr; |
| 1539 | fprintf_unfiltered (file, "*%d", footnote_register_offset); |
| 1540 | } |
| 1541 | else |
| 1542 | fprintf_unfiltered (file, " "); |
| 1543 | register_offset = (regcache->descr->register_offset[regnum] |
| 1544 | + regcache->descr->sizeof_register[regnum]); |
| 1545 | } |
| 1546 | |
| 1547 | /* Size. */ |
| 1548 | if (regnum < 0) |
| 1549 | fprintf_unfiltered (file, " %5s ", "Size"); |
| 1550 | else |
| 1551 | { |
| 1552 | fprintf_unfiltered (file, " %5ld", |
| 1553 | regcache->descr->sizeof_register[regnum]); |
| 1554 | if ((regcache->descr->sizeof_register[regnum] |
| 1555 | != DEPRECATED_REGISTER_RAW_SIZE (regnum)) |
| 1556 | || (regcache->descr->sizeof_register[regnum] |
| 1557 | != DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum)) |
| 1558 | || (regcache->descr->sizeof_register[regnum] |
| 1559 | != TYPE_LENGTH (register_type (regcache->descr->gdbarch, |
| 1560 | regnum))) |
| 1561 | ) |
| 1562 | { |
| 1563 | if (!footnote_register_size) |
| 1564 | footnote_register_size = ++footnote_nr; |
| 1565 | fprintf_unfiltered (file, "*%d", footnote_register_size); |
| 1566 | } |
| 1567 | else |
| 1568 | fprintf_unfiltered (file, " "); |
| 1569 | } |
| 1570 | |
| 1571 | /* Type. */ |
| 1572 | { |
| 1573 | const char *t; |
| 1574 | if (regnum < 0) |
| 1575 | t = "Type"; |
| 1576 | else |
| 1577 | { |
| 1578 | static const char blt[] = "builtin_type"; |
| 1579 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); |
| 1580 | if (t == NULL) |
| 1581 | { |
| 1582 | char *n; |
| 1583 | if (!footnote_register_type_name_null) |
| 1584 | footnote_register_type_name_null = ++footnote_nr; |
| 1585 | xasprintf (&n, "*%d", footnote_register_type_name_null); |
| 1586 | make_cleanup (xfree, n); |
| 1587 | t = n; |
| 1588 | } |
| 1589 | /* Chop a leading builtin_type. */ |
| 1590 | if (strncmp (t, blt, strlen (blt)) == 0) |
| 1591 | t += strlen (blt); |
| 1592 | } |
| 1593 | fprintf_unfiltered (file, " %-15s", t); |
| 1594 | } |
| 1595 | |
| 1596 | /* Leading space always present. */ |
| 1597 | fprintf_unfiltered (file, " "); |
| 1598 | |
| 1599 | /* Value, raw. */ |
| 1600 | if (what_to_dump == regcache_dump_raw) |
| 1601 | { |
| 1602 | if (regnum < 0) |
| 1603 | fprintf_unfiltered (file, "Raw value"); |
| 1604 | else if (regnum >= regcache->descr->nr_raw_registers) |
| 1605 | fprintf_unfiltered (file, "<cooked>"); |
| 1606 | else if (!regcache_valid_p (regcache, regnum)) |
| 1607 | fprintf_unfiltered (file, "<invalid>"); |
| 1608 | else |
| 1609 | { |
| 1610 | regcache_raw_read (regcache, regnum, buf); |
| 1611 | fprintf_unfiltered (file, "0x"); |
| 1612 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, |
| 1613 | DEPRECATED_REGISTER_RAW_SIZE (regnum)); |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | /* Value, cooked. */ |
| 1618 | if (what_to_dump == regcache_dump_cooked) |
| 1619 | { |
| 1620 | if (regnum < 0) |
| 1621 | fprintf_unfiltered (file, "Cooked value"); |
| 1622 | else |
| 1623 | { |
| 1624 | regcache_cooked_read (regcache, regnum, buf); |
| 1625 | fprintf_unfiltered (file, "0x"); |
| 1626 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, |
| 1627 | DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum)); |
| 1628 | } |
| 1629 | } |
| 1630 | |
| 1631 | /* Group members. */ |
| 1632 | if (what_to_dump == regcache_dump_groups) |
| 1633 | { |
| 1634 | if (regnum < 0) |
| 1635 | fprintf_unfiltered (file, "Groups"); |
| 1636 | else |
| 1637 | { |
| 1638 | const char *sep = ""; |
| 1639 | struct reggroup *group; |
| 1640 | for (group = reggroup_next (gdbarch, NULL); |
| 1641 | group != NULL; |
| 1642 | group = reggroup_next (gdbarch, group)) |
| 1643 | { |
| 1644 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 1645 | { |
| 1646 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group)); |
| 1647 | sep = ","; |
| 1648 | } |
| 1649 | } |
| 1650 | } |
| 1651 | } |
| 1652 | |
| 1653 | fprintf_unfiltered (file, "\n"); |
| 1654 | } |
| 1655 | |
| 1656 | if (footnote_register_size) |
| 1657 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", |
| 1658 | footnote_register_size); |
| 1659 | if (footnote_register_offset) |
| 1660 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", |
| 1661 | footnote_register_offset); |
| 1662 | if (footnote_register_type_name_null) |
| 1663 | fprintf_unfiltered (file, |
| 1664 | "*%d: Register type's name NULL.\n", |
| 1665 | footnote_register_type_name_null); |
| 1666 | do_cleanups (cleanups); |
| 1667 | } |
| 1668 | |
| 1669 | static void |
| 1670 | regcache_print (char *args, enum regcache_dump_what what_to_dump) |
| 1671 | { |
| 1672 | if (args == NULL) |
| 1673 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); |
| 1674 | else |
| 1675 | { |
| 1676 | struct ui_file *file = gdb_fopen (args, "w"); |
| 1677 | if (file == NULL) |
| 1678 | perror_with_name ("maintenance print architecture"); |
| 1679 | regcache_dump (current_regcache, file, what_to_dump); |
| 1680 | ui_file_delete (file); |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | static void |
| 1685 | maintenance_print_registers (char *args, int from_tty) |
| 1686 | { |
| 1687 | regcache_print (args, regcache_dump_none); |
| 1688 | } |
| 1689 | |
| 1690 | static void |
| 1691 | maintenance_print_raw_registers (char *args, int from_tty) |
| 1692 | { |
| 1693 | regcache_print (args, regcache_dump_raw); |
| 1694 | } |
| 1695 | |
| 1696 | static void |
| 1697 | maintenance_print_cooked_registers (char *args, int from_tty) |
| 1698 | { |
| 1699 | regcache_print (args, regcache_dump_cooked); |
| 1700 | } |
| 1701 | |
| 1702 | static void |
| 1703 | maintenance_print_register_groups (char *args, int from_tty) |
| 1704 | { |
| 1705 | regcache_print (args, regcache_dump_groups); |
| 1706 | } |
| 1707 | |
| 1708 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
| 1709 | |
| 1710 | void |
| 1711 | _initialize_regcache (void) |
| 1712 | { |
| 1713 | regcache_descr_handle = register_gdbarch_data (init_regcache_descr); |
| 1714 | REGISTER_GDBARCH_SWAP (current_regcache); |
| 1715 | register_gdbarch_swap (&deprecated_registers, sizeof (deprecated_registers), NULL); |
| 1716 | register_gdbarch_swap (&deprecated_register_valid, sizeof (deprecated_register_valid), NULL); |
| 1717 | register_gdbarch_swap (NULL, 0, build_regcache); |
| 1718 | |
| 1719 | add_com ("flushregs", class_maintenance, reg_flush_command, |
| 1720 | "Force gdb to flush its register cache (maintainer command)"); |
| 1721 | |
| 1722 | /* Initialize the thread/process associated with the current set of |
| 1723 | registers. For now, -1 is special, and means `no current process'. */ |
| 1724 | registers_ptid = pid_to_ptid (-1); |
| 1725 | |
| 1726 | add_cmd ("registers", class_maintenance, |
| 1727 | maintenance_print_registers, |
| 1728 | "Print the internal register configuration.\ |
| 1729 | Takes an optional file parameter.", |
| 1730 | &maintenanceprintlist); |
| 1731 | add_cmd ("raw-registers", class_maintenance, |
| 1732 | maintenance_print_raw_registers, |
| 1733 | "Print the internal register configuration including raw values.\ |
| 1734 | Takes an optional file parameter.", |
| 1735 | &maintenanceprintlist); |
| 1736 | add_cmd ("cooked-registers", class_maintenance, |
| 1737 | maintenance_print_cooked_registers, |
| 1738 | "Print the internal register configuration including cooked values.\ |
| 1739 | Takes an optional file parameter.", |
| 1740 | &maintenanceprintlist); |
| 1741 | add_cmd ("register-groups", class_maintenance, |
| 1742 | maintenance_print_register_groups, |
| 1743 | "Print the internal register configuration including each register's group.\ |
| 1744 | Takes an optional file parameter.", |
| 1745 | &maintenanceprintlist); |
| 1746 | |
| 1747 | } |