Commit | Line | Data |
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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
197e01b6 | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, |
9564ee9f | 4 | 2001, 2002, 2004 Free Software Foundation, Inc. |
32178cab MS |
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 | |
197e01b6 EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
32178cab MS |
22 | |
23 | #include "defs.h" | |
32178cab MS |
24 | #include "inferior.h" |
25 | #include "target.h" | |
26 | #include "gdbarch.h" | |
705152c5 | 27 | #include "gdbcmd.h" |
4e052eda | 28 | #include "regcache.h" |
b59ff9d5 | 29 | #include "reggroups.h" |
61a0eb5b | 30 | #include "gdb_assert.h" |
b66d6d2e | 31 | #include "gdb_string.h" |
af030b9a | 32 | #include "gdbcmd.h" /* For maintenanceprintlist. */ |
f4c5303c | 33 | #include "observer.h" |
32178cab MS |
34 | |
35 | /* | |
36 | * DATA STRUCTURE | |
37 | * | |
38 | * Here is the actual register cache. | |
39 | */ | |
40 | ||
3fadccb3 AC |
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 | ||
bb1db049 AC |
51 | /* The raw register cache. Each raw (or hard) register is supplied |
52 | by the target interface. The raw cache should not contain | |
53 | redundant information - if the PC is constructed from two | |
d2f0b918 | 54 | registers then those registers and not the PC lives in the raw |
bb1db049 | 55 | cache. */ |
3fadccb3 AC |
56 | int nr_raw_registers; |
57 | long sizeof_raw_registers; | |
58 | long sizeof_raw_register_valid_p; | |
59 | ||
d138e37a AC |
60 | /* The cooked register space. Each cooked register in the range |
61 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
62 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 63 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 64 | both raw registers and memory by the architecture methods |
02f60eae | 65 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 66 | int nr_cooked_registers; |
067df2e5 AC |
67 | long sizeof_cooked_registers; |
68 | long sizeof_cooked_register_valid_p; | |
d138e37a AC |
69 | |
70 | /* Offset and size (in 8 bit bytes), of reach register in the | |
71 | register cache. All registers (including those in the range | |
72 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. | |
73 | Assigning all registers an offset makes it possible to keep | |
74 | legacy code, such as that found in read_register_bytes() and | |
75 | write_register_bytes() working. */ | |
3fadccb3 | 76 | long *register_offset; |
3fadccb3 | 77 | long *sizeof_register; |
3fadccb3 | 78 | |
bb425013 AC |
79 | /* Cached table containing the type of each register. */ |
80 | struct type **register_type; | |
3fadccb3 AC |
81 | }; |
82 | ||
3fadccb3 AC |
83 | static void * |
84 | init_regcache_descr (struct gdbarch *gdbarch) | |
85 | { | |
86 | int i; | |
87 | struct regcache_descr *descr; | |
88 | gdb_assert (gdbarch != NULL); | |
89 | ||
bb425013 | 90 | /* Create an initial, zero filled, table. */ |
116f06ea | 91 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 92 | descr->gdbarch = gdbarch; |
3fadccb3 | 93 | |
d138e37a AC |
94 | /* Total size of the register space. The raw registers are mapped |
95 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 96 | either mapped onto raw-registers or memory. */ |
d138e37a | 97 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
067df2e5 | 98 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
3fadccb3 | 99 | |
bb425013 | 100 | /* Fill in a table of register types. */ |
116f06ea AC |
101 | descr->register_type |
102 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *); | |
bb425013 | 103 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 104 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 105 | |
bb1db049 AC |
106 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
107 | into the register cache. */ | |
108 | descr->nr_raw_registers = NUM_REGS; | |
109 | ||
110 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p | |
111 | array. This pretects GDB from erant code that accesses elements | |
112 | of the global register_valid_p[] array in the range [NUM_REGS | |
113 | .. NUM_REGS + NUM_PSEUDO_REGS). */ | |
114 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; | |
115 | ||
067df2e5 | 116 | /* Lay out the register cache. |
3fadccb3 | 117 | |
bb425013 AC |
118 | NOTE: cagney/2002-05-22: Only register_type() is used when |
119 | constructing the register cache. It is assumed that the | |
120 | register's raw size, virtual size and type length are all the | |
121 | same. */ | |
3fadccb3 AC |
122 | |
123 | { | |
124 | long offset = 0; | |
116f06ea AC |
125 | descr->sizeof_register |
126 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
127 | descr->register_offset | |
128 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
d138e37a | 129 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 130 | { |
bb425013 | 131 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
132 | descr->register_offset[i] = offset; |
133 | offset += descr->sizeof_register[i]; | |
123a958e | 134 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
3fadccb3 AC |
135 | } |
136 | /* Set the real size of the register cache buffer. */ | |
067df2e5 | 137 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
138 | } |
139 | ||
067df2e5 | 140 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
ce2826aa | 141 | the raw registers. Unfortunately some code still accesses the |
067df2e5 AC |
142 | register array directly using the global registers[]. Until that |
143 | code has been purged, play safe and over allocating the register | |
144 | buffer. Ulgh! */ | |
145 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
146 | ||
3fadccb3 AC |
147 | return descr; |
148 | } | |
149 | ||
150 | static struct regcache_descr * | |
151 | regcache_descr (struct gdbarch *gdbarch) | |
152 | { | |
153 | return gdbarch_data (gdbarch, regcache_descr_handle); | |
154 | } | |
155 | ||
bb425013 AC |
156 | /* Utility functions returning useful register attributes stored in |
157 | the regcache descr. */ | |
158 | ||
159 | struct type * | |
160 | register_type (struct gdbarch *gdbarch, int regnum) | |
161 | { | |
162 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
163 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
164 | return descr->register_type[regnum]; | |
165 | } | |
166 | ||
0ed04cce AC |
167 | /* Utility functions returning useful register attributes stored in |
168 | the regcache descr. */ | |
169 | ||
08a617da AC |
170 | int |
171 | register_size (struct gdbarch *gdbarch, int regnum) | |
172 | { | |
173 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
174 | int size; | |
175 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); | |
176 | size = descr->sizeof_register[regnum]; | |
08a617da AC |
177 | return size; |
178 | } | |
179 | ||
3fadccb3 AC |
180 | /* The register cache for storing raw register values. */ |
181 | ||
182 | struct regcache | |
183 | { | |
184 | struct regcache_descr *descr; | |
51b1fe4e AC |
185 | /* The register buffers. A read-only register cache can hold the |
186 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write | |
187 | register cache can only hold [0 .. NUM_REGS). */ | |
2d522557 | 188 | gdb_byte *registers; |
b05e64e5 FR |
189 | /* Register cache status: |
190 | register_valid_p[REG] == 0 if REG value is not in the cache | |
191 | > 0 if REG value is in the cache | |
192 | < 0 if REG value is permanently unavailable */ | |
193 | signed char *register_valid_p; | |
2d28509a AC |
194 | /* Is this a read-only cache? A read-only cache is used for saving |
195 | the target's register state (e.g, across an inferior function | |
196 | call or just before forcing a function return). A read-only | |
197 | cache can only be updated via the methods regcache_dup() and | |
198 | regcache_cpy(). The actual contents are determined by the | |
199 | reggroup_save and reggroup_restore methods. */ | |
200 | int readonly_p; | |
3fadccb3 AC |
201 | }; |
202 | ||
203 | struct regcache * | |
204 | regcache_xmalloc (struct gdbarch *gdbarch) | |
205 | { | |
206 | struct regcache_descr *descr; | |
207 | struct regcache *regcache; | |
208 | gdb_assert (gdbarch != NULL); | |
209 | descr = regcache_descr (gdbarch); | |
210 | regcache = XMALLOC (struct regcache); | |
211 | regcache->descr = descr; | |
51b1fe4e | 212 | regcache->registers |
2d522557 | 213 | = XCALLOC (descr->sizeof_raw_registers, gdb_byte); |
51b1fe4e | 214 | regcache->register_valid_p |
2d522557 | 215 | = XCALLOC (descr->sizeof_raw_register_valid_p, gdb_byte); |
2d28509a | 216 | regcache->readonly_p = 1; |
3fadccb3 AC |
217 | return regcache; |
218 | } | |
219 | ||
220 | void | |
221 | regcache_xfree (struct regcache *regcache) | |
222 | { | |
223 | if (regcache == NULL) | |
224 | return; | |
51b1fe4e AC |
225 | xfree (regcache->registers); |
226 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
227 | xfree (regcache); |
228 | } | |
229 | ||
b9362cc7 | 230 | static void |
36160dc4 AC |
231 | do_regcache_xfree (void *data) |
232 | { | |
233 | regcache_xfree (data); | |
234 | } | |
235 | ||
236 | struct cleanup * | |
237 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
238 | { | |
239 | return make_cleanup (do_regcache_xfree, regcache); | |
240 | } | |
241 | ||
41d35cb0 MK |
242 | /* Return REGCACHE's architecture. */ |
243 | ||
244 | struct gdbarch * | |
245 | get_regcache_arch (const struct regcache *regcache) | |
246 | { | |
247 | return regcache->descr->gdbarch; | |
248 | } | |
249 | ||
51b1fe4e AC |
250 | /* Return a pointer to register REGNUM's buffer cache. */ |
251 | ||
2d522557 | 252 | static gdb_byte * |
9a661b68 | 253 | register_buffer (const struct regcache *regcache, int regnum) |
51b1fe4e AC |
254 | { |
255 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
256 | } | |
257 | ||
2d28509a | 258 | void |
5602984a AC |
259 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
260 | void *src) | |
2d28509a AC |
261 | { |
262 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
2d522557 | 263 | gdb_byte buf[MAX_REGISTER_SIZE]; |
2d28509a | 264 | int regnum; |
2d28509a | 265 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 266 | end up trying to write the register values back out to the |
2d28509a | 267 | target. */ |
2d28509a AC |
268 | gdb_assert (dst->readonly_p); |
269 | /* Clear the dest. */ | |
270 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
271 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); | |
272 | /* Copy over any registers (identified by their membership in the | |
5602984a AC |
273 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
274 | NUM_PSEUDO_REGS) range is checked since some architectures need | |
275 | to save/restore `cooked' registers that live in memory. */ | |
2d28509a AC |
276 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
277 | { | |
278 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
279 | { | |
5602984a AC |
280 | int valid = cooked_read (src, regnum, buf); |
281 | if (valid) | |
282 | { | |
283 | memcpy (register_buffer (dst, regnum), buf, | |
284 | register_size (gdbarch, regnum)); | |
285 | dst->register_valid_p[regnum] = 1; | |
286 | } | |
2d28509a AC |
287 | } |
288 | } | |
289 | } | |
290 | ||
291 | void | |
5602984a AC |
292 | regcache_restore (struct regcache *dst, |
293 | regcache_cooked_read_ftype *cooked_read, | |
2d522557 | 294 | void *cooked_read_context) |
2d28509a AC |
295 | { |
296 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
2d522557 | 297 | gdb_byte buf[MAX_REGISTER_SIZE]; |
2d28509a | 298 | int regnum; |
5602984a AC |
299 | /* The dst had better not be read-only. If it is, the `restore' |
300 | doesn't make much sense. */ | |
2d28509a | 301 | gdb_assert (!dst->readonly_p); |
2d28509a | 302 | /* Copy over any registers, being careful to only restore those that |
5602984a AC |
303 | were both saved and need to be restored. The full [0 .. NUM_REGS |
304 | + NUM_PSEUDO_REGS) range is checked since some architectures need | |
305 | to save/restore `cooked' registers that live in memory. */ | |
306 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 307 | { |
5602984a | 308 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 309 | { |
2d522557 | 310 | int valid = cooked_read (cooked_read_context, regnum, buf); |
5602984a AC |
311 | if (valid) |
312 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
313 | } |
314 | } | |
315 | } | |
316 | ||
5602984a | 317 | static int |
2d522557 | 318 | do_cooked_read (void *src, int regnum, gdb_byte *buf) |
5602984a AC |
319 | { |
320 | struct regcache *regcache = src; | |
6f4e5a41 | 321 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
5602984a AC |
322 | /* Don't even think about fetching a register from a read-only |
323 | cache when the register isn't yet valid. There isn't a target | |
324 | from which the register value can be fetched. */ | |
325 | return 0; | |
326 | regcache_cooked_read (regcache, regnum, buf); | |
327 | return 1; | |
328 | } | |
329 | ||
330 | ||
3fadccb3 AC |
331 | void |
332 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
333 | { | |
334 | int i; | |
2d522557 | 335 | gdb_byte *buf; |
3fadccb3 AC |
336 | gdb_assert (src != NULL && dst != NULL); |
337 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
338 | gdb_assert (src != dst); | |
2d28509a AC |
339 | gdb_assert (src->readonly_p || dst->readonly_p); |
340 | if (!src->readonly_p) | |
5602984a | 341 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 342 | else if (!dst->readonly_p) |
5602984a | 343 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
344 | else |
345 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
346 | } |
347 | ||
348 | void | |
349 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
350 | { | |
351 | int i; | |
352 | gdb_assert (src != NULL && dst != NULL); | |
353 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
354 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
355 | move of data into the current_regcache(). Doing this would be | |
9564ee9f | 356 | silly - it would mean that valid_p would be completely invalid. */ |
3fadccb3 | 357 | gdb_assert (dst != current_regcache); |
51b1fe4e AC |
358 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
359 | memcpy (dst->register_valid_p, src->register_valid_p, | |
3fadccb3 AC |
360 | dst->descr->sizeof_raw_register_valid_p); |
361 | } | |
362 | ||
363 | struct regcache * | |
364 | regcache_dup (struct regcache *src) | |
365 | { | |
366 | struct regcache *newbuf; | |
367 | gdb_assert (current_regcache != NULL); | |
368 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
369 | regcache_cpy (newbuf, src); | |
370 | return newbuf; | |
371 | } | |
372 | ||
373 | struct regcache * | |
374 | regcache_dup_no_passthrough (struct regcache *src) | |
375 | { | |
376 | struct regcache *newbuf; | |
377 | gdb_assert (current_regcache != NULL); | |
378 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
379 | regcache_cpy_no_passthrough (newbuf, src); | |
380 | return newbuf; | |
381 | } | |
382 | ||
383 | int | |
384 | regcache_valid_p (struct regcache *regcache, int regnum) | |
385 | { | |
386 | gdb_assert (regcache != NULL); | |
387 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
51b1fe4e | 388 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
389 | } |
390 | ||
2d522557 | 391 | gdb_byte * |
3fadccb3 AC |
392 | deprecated_grub_regcache_for_registers (struct regcache *regcache) |
393 | { | |
51b1fe4e | 394 | return regcache->registers; |
3fadccb3 AC |
395 | } |
396 | ||
3fadccb3 AC |
397 | /* Global structure containing the current regcache. */ |
398 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and | |
8262ee23 | 399 | deprecated_register_valid[] currently point into this structure. */ |
3fadccb3 AC |
400 | struct regcache *current_regcache; |
401 | ||
5ebd2499 | 402 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
403 | recording if the register values have been changed (eg. by the |
404 | user). Therefore all registers must be written back to the | |
405 | target when appropriate. */ | |
406 | ||
39f77062 | 407 | /* The thread/process associated with the current set of registers. */ |
32178cab | 408 | |
39f77062 | 409 | static ptid_t registers_ptid; |
32178cab MS |
410 | |
411 | /* | |
412 | * FUNCTIONS: | |
413 | */ | |
414 | ||
415 | /* REGISTER_CACHED() | |
416 | ||
417 | Returns 0 if the value is not in the cache (needs fetch). | |
418 | >0 if the value is in the cache. | |
419 | <0 if the value is permanently unavailable (don't ask again). */ | |
420 | ||
421 | int | |
422 | register_cached (int regnum) | |
423 | { | |
8851ec7a | 424 | return current_regcache->register_valid_p[regnum]; |
32178cab MS |
425 | } |
426 | ||
7302a204 ND |
427 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
428 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ | |
429 | ||
430 | void | |
431 | set_register_cached (int regnum, int state) | |
432 | { | |
53826de9 AC |
433 | gdb_assert (regnum >= 0); |
434 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); | |
51b1fe4e | 435 | current_regcache->register_valid_p[regnum] = state; |
7302a204 ND |
436 | } |
437 | ||
f4c5303c OF |
438 | /* Observer for the target_changed event. */ |
439 | ||
440 | void | |
441 | regcache_observer_target_changed (struct target_ops *target) | |
442 | { | |
443 | registers_changed (); | |
444 | } | |
445 | ||
32178cab MS |
446 | /* Low level examining and depositing of registers. |
447 | ||
448 | The caller is responsible for making sure that the inferior is | |
449 | stopped before calling the fetching routines, or it will get | |
450 | garbage. (a change from GDB version 3, in which the caller got the | |
451 | value from the last stop). */ | |
452 | ||
453 | /* REGISTERS_CHANGED () | |
454 | ||
455 | Indicate that registers may have changed, so invalidate the cache. */ | |
456 | ||
457 | void | |
458 | registers_changed (void) | |
459 | { | |
460 | int i; | |
32178cab | 461 | |
39f77062 | 462 | registers_ptid = pid_to_ptid (-1); |
32178cab MS |
463 | |
464 | /* Force cleanup of any alloca areas if using C alloca instead of | |
465 | a builtin alloca. This particular call is used to clean up | |
466 | areas allocated by low level target code which may build up | |
467 | during lengthy interactions between gdb and the target before | |
468 | gdb gives control to the user (ie watchpoints). */ | |
469 | alloca (0); | |
470 | ||
53826de9 | 471 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
7302a204 | 472 | set_register_cached (i, 0); |
32178cab | 473 | |
9a4105ab AC |
474 | if (deprecated_registers_changed_hook) |
475 | deprecated_registers_changed_hook (); | |
32178cab MS |
476 | } |
477 | ||
2b9e5f3f | 478 | /* DEPRECATED_REGISTERS_FETCHED () |
32178cab MS |
479 | |
480 | Indicate that all registers have been fetched, so mark them all valid. */ | |
481 | ||
31e9866e AC |
482 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target |
483 | code was blatting the registers[] array and then calling this. | |
23a6d369 | 484 | Since targets should only be using regcache_raw_supply() the need for |
31e9866e | 485 | this function/hack is eliminated. */ |
32178cab MS |
486 | |
487 | void | |
2b9e5f3f | 488 | deprecated_registers_fetched (void) |
32178cab MS |
489 | { |
490 | int i; | |
32178cab | 491 | |
a728f042 | 492 | for (i = 0; i < NUM_REGS; i++) |
7302a204 | 493 | set_register_cached (i, 1); |
fcdc5976 | 494 | /* Do not assume that the pseudo-regs have also been fetched. |
31e9866e | 495 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
32178cab MS |
496 | } |
497 | ||
73937e03 AC |
498 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
499 | are generally a *BAD* idea. They are inefficient because they need | |
500 | to check for partial updates, which can only be done by scanning | |
501 | through all of the registers and seeing if the bytes that are being | |
502 | read/written fall inside of an invalid register. [The main reason | |
503 | this is necessary is that register sizes can vary, so a simple | |
504 | index won't suffice.] It is far better to call read_register_gen | |
505 | and write_register_gen if you want to get at the raw register | |
506 | contents, as it only takes a regnum as an argument, and therefore | |
507 | can't do a partial register update. | |
32178cab MS |
508 | |
509 | Prior to the recent fixes to check for partial updates, both read | |
73937e03 AC |
510 | and deprecated_write_register_bytes always checked to see if any |
511 | registers were stale, and then called target_fetch_registers (-1) | |
512 | to update the whole set. This caused really slowed things down for | |
513 | remote targets. */ | |
32178cab MS |
514 | |
515 | /* Copy INLEN bytes of consecutive data from registers | |
516 | starting with the INREGBYTE'th byte of register data | |
517 | into memory at MYADDR. */ | |
518 | ||
519 | void | |
2d522557 | 520 | deprecated_read_register_bytes (int in_start, gdb_byte *in_buf, int in_len) |
32178cab | 521 | { |
61a0eb5b | 522 | int in_end = in_start + in_len; |
5ebd2499 | 523 | int regnum; |
2d522557 | 524 | gdb_byte reg_buf[MAX_REGISTER_SIZE]; |
32178cab MS |
525 | |
526 | /* See if we are trying to read bytes from out-of-date registers. If so, | |
527 | update just those registers. */ | |
528 | ||
5ebd2499 | 529 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab | 530 | { |
61a0eb5b AC |
531 | int reg_start; |
532 | int reg_end; | |
533 | int reg_len; | |
534 | int start; | |
535 | int end; | |
536 | int byte; | |
32178cab | 537 | |
62700349 | 538 | reg_start = DEPRECATED_REGISTER_BYTE (regnum); |
3acba339 | 539 | reg_len = register_size (current_gdbarch, regnum); |
61a0eb5b | 540 | reg_end = reg_start + reg_len; |
32178cab | 541 | |
61a0eb5b | 542 | if (reg_end <= in_start || in_end <= reg_start) |
5ebd2499 | 543 | /* The range the user wants to read doesn't overlap with regnum. */ |
32178cab MS |
544 | continue; |
545 | ||
275f450c AC |
546 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
547 | /* Force the cache to fetch the entire register. */ | |
4caf0990 | 548 | deprecated_read_register_gen (regnum, reg_buf); |
32178cab | 549 | |
61a0eb5b AC |
550 | /* Legacy note: This function, for some reason, allows a NULL |
551 | input buffer. If the buffer is NULL, the registers are still | |
552 | fetched, just the final transfer is skipped. */ | |
553 | if (in_buf == NULL) | |
554 | continue; | |
555 | ||
556 | /* start = max (reg_start, in_start) */ | |
557 | if (reg_start > in_start) | |
558 | start = reg_start; | |
559 | else | |
560 | start = in_start; | |
561 | ||
562 | /* end = min (reg_end, in_end) */ | |
563 | if (reg_end < in_end) | |
564 | end = reg_end; | |
565 | else | |
566 | end = in_end; | |
567 | ||
568 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ | |
569 | for (byte = start; byte < end; byte++) | |
165cd47f | 570 | { |
61a0eb5b | 571 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
165cd47f | 572 | } |
32178cab | 573 | } |
32178cab MS |
574 | } |
575 | ||
61a0eb5b | 576 | void |
2d522557 | 577 | regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
61a0eb5b | 578 | { |
3fadccb3 AC |
579 | gdb_assert (regcache != NULL && buf != NULL); |
580 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
3fadccb3 AC |
581 | /* Make certain that the register cache is up-to-date with respect |
582 | to the current thread. This switching shouldn't be necessary | |
583 | only there is still only one target side register cache. Sigh! | |
584 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 585 | if (!regcache->readonly_p) |
3fadccb3 AC |
586 | { |
587 | gdb_assert (regcache == current_regcache); | |
588 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
589 | { | |
590 | registers_changed (); | |
591 | registers_ptid = inferior_ptid; | |
592 | } | |
593 | if (!register_cached (regnum)) | |
5c27f28a | 594 | target_fetch_registers (regnum); |
0a8146bf AC |
595 | #if 0 |
596 | /* FIXME: cagney/2004-08-07: At present a number of targets | |
04c663e3 DA |
597 | forget (or didn't know that they needed) to set this leading to |
598 | panics. Also is the problem that targets need to indicate | |
0a8146bf AC |
599 | that a register is in one of the possible states: valid, |
600 | undefined, unknown. The last of which isn't yet | |
601 | possible. */ | |
7ab3286f | 602 | gdb_assert (register_cached (regnum)); |
0a8146bf | 603 | #endif |
3fadccb3 AC |
604 | } |
605 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 606 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 607 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
608 | } |
609 | ||
28fc6740 AC |
610 | void |
611 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
612 | { | |
2d522557 | 613 | gdb_byte *buf; |
28fc6740 AC |
614 | gdb_assert (regcache != NULL); |
615 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
616 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
617 | regcache_raw_read (regcache, regnum, buf); | |
618 | (*val) = extract_signed_integer (buf, | |
619 | regcache->descr->sizeof_register[regnum]); | |
620 | } | |
621 | ||
622 | void | |
623 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
624 | ULONGEST *val) | |
625 | { | |
2d522557 | 626 | gdb_byte *buf; |
28fc6740 AC |
627 | gdb_assert (regcache != NULL); |
628 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
629 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
630 | regcache_raw_read (regcache, regnum, buf); | |
631 | (*val) = extract_unsigned_integer (buf, | |
632 | regcache->descr->sizeof_register[regnum]); | |
633 | } | |
634 | ||
c00dcbe9 MK |
635 | void |
636 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
637 | { | |
638 | void *buf; | |
639 | gdb_assert (regcache != NULL); | |
640 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
641 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
642 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
643 | regcache_raw_write (regcache, regnum, buf); | |
644 | } | |
645 | ||
646 | void | |
647 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
648 | ULONGEST val) | |
649 | { | |
650 | void *buf; | |
651 | gdb_assert (regcache != NULL); | |
652 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
653 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
654 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
655 | regcache_raw_write (regcache, regnum, buf); | |
656 | } | |
657 | ||
61a0eb5b | 658 | void |
2d522557 | 659 | deprecated_read_register_gen (int regnum, gdb_byte *buf) |
61a0eb5b | 660 | { |
3fadccb3 AC |
661 | gdb_assert (current_regcache != NULL); |
662 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
68365089 AC |
663 | regcache_cooked_read (current_regcache, regnum, buf); |
664 | } | |
665 | ||
666 | void | |
2d522557 | 667 | regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
68365089 | 668 | { |
d138e37a | 669 | gdb_assert (regnum >= 0); |
68365089 AC |
670 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
671 | if (regnum < regcache->descr->nr_raw_registers) | |
672 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
673 | else if (regcache->readonly_p |
674 | && regnum < regcache->descr->nr_cooked_registers | |
675 | && regcache->register_valid_p[regnum]) | |
b2fa5097 | 676 | /* Read-only register cache, perhaps the cooked value was cached? */ |
2d28509a AC |
677 | memcpy (buf, register_buffer (regcache, regnum), |
678 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 679 | else |
68365089 AC |
680 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
681 | regnum, buf); | |
61a0eb5b AC |
682 | } |
683 | ||
a378f419 AC |
684 | void |
685 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
686 | LONGEST *val) | |
687 | { | |
2d522557 | 688 | gdb_byte *buf; |
a378f419 | 689 | gdb_assert (regcache != NULL); |
a66a9c23 | 690 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
691 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
692 | regcache_cooked_read (regcache, regnum, buf); | |
693 | (*val) = extract_signed_integer (buf, | |
694 | regcache->descr->sizeof_register[regnum]); | |
695 | } | |
696 | ||
697 | void | |
698 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
699 | ULONGEST *val) | |
700 | { | |
2d522557 | 701 | gdb_byte *buf; |
a378f419 | 702 | gdb_assert (regcache != NULL); |
a66a9c23 | 703 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
704 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
705 | regcache_cooked_read (regcache, regnum, buf); | |
706 | (*val) = extract_unsigned_integer (buf, | |
707 | regcache->descr->sizeof_register[regnum]); | |
708 | } | |
709 | ||
a66a9c23 AC |
710 | void |
711 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
712 | LONGEST val) | |
713 | { | |
714 | void *buf; | |
715 | gdb_assert (regcache != NULL); | |
716 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
717 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
718 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
719 | regcache_cooked_write (regcache, regnum, buf); | |
720 | } | |
721 | ||
722 | void | |
723 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
724 | ULONGEST val) | |
725 | { | |
726 | void *buf; | |
727 | gdb_assert (regcache != NULL); | |
728 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
729 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
730 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
731 | regcache_cooked_write (regcache, regnum, buf); | |
732 | } | |
733 | ||
61a0eb5b | 734 | void |
2d522557 AC |
735 | regcache_raw_write (struct regcache *regcache, int regnum, |
736 | const gdb_byte *buf) | |
61a0eb5b | 737 | { |
3fadccb3 AC |
738 | gdb_assert (regcache != NULL && buf != NULL); |
739 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 740 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 741 | |
3fadccb3 AC |
742 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
743 | change the registers array if something writes to this register. */ | |
744 | if (CANNOT_STORE_REGISTER (regnum)) | |
745 | return; | |
746 | ||
3fadccb3 AC |
747 | /* Make certain that the correct cache is selected. */ |
748 | gdb_assert (regcache == current_regcache); | |
749 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
750 | { | |
751 | registers_changed (); | |
752 | registers_ptid = inferior_ptid; | |
753 | } | |
754 | ||
755 | /* If we have a valid copy of the register, and new value == old | |
756 | value, then don't bother doing the actual store. */ | |
757 | if (regcache_valid_p (regcache, regnum) | |
758 | && (memcmp (register_buffer (regcache, regnum), buf, | |
759 | regcache->descr->sizeof_register[regnum]) == 0)) | |
760 | return; | |
761 | ||
762 | target_prepare_to_store (); | |
763 | memcpy (register_buffer (regcache, regnum), buf, | |
764 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 765 | regcache->register_valid_p[regnum] = 1; |
5c27f28a | 766 | target_store_registers (regnum); |
61a0eb5b AC |
767 | } |
768 | ||
769 | void | |
2d522557 | 770 | deprecated_write_register_gen (int regnum, gdb_byte *buf) |
61a0eb5b | 771 | { |
3fadccb3 AC |
772 | gdb_assert (current_regcache != NULL); |
773 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
68365089 AC |
774 | regcache_cooked_write (current_regcache, regnum, buf); |
775 | } | |
776 | ||
777 | void | |
2d522557 AC |
778 | regcache_cooked_write (struct regcache *regcache, int regnum, |
779 | const gdb_byte *buf) | |
68365089 | 780 | { |
d138e37a | 781 | gdb_assert (regnum >= 0); |
68365089 AC |
782 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
783 | if (regnum < regcache->descr->nr_raw_registers) | |
784 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 785 | else |
68365089 | 786 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 787 | regnum, buf); |
61a0eb5b AC |
788 | } |
789 | ||
32178cab MS |
790 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
791 | into registers starting with the MYREGSTART'th byte of register data. */ | |
792 | ||
793 | void | |
2d522557 | 794 | deprecated_write_register_bytes (int myregstart, gdb_byte *myaddr, int inlen) |
32178cab MS |
795 | { |
796 | int myregend = myregstart + inlen; | |
5ebd2499 | 797 | int regnum; |
32178cab MS |
798 | |
799 | target_prepare_to_store (); | |
800 | ||
801 | /* Scan through the registers updating any that are covered by the | |
802 | range myregstart<=>myregend using write_register_gen, which does | |
803 | nice things like handling threads, and avoiding updates when the | |
804 | new and old contents are the same. */ | |
805 | ||
5ebd2499 | 806 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab MS |
807 | { |
808 | int regstart, regend; | |
809 | ||
62700349 | 810 | regstart = DEPRECATED_REGISTER_BYTE (regnum); |
3acba339 | 811 | regend = regstart + register_size (current_gdbarch, regnum); |
32178cab MS |
812 | |
813 | /* Is this register completely outside the range the user is writing? */ | |
814 | if (myregend <= regstart || regend <= myregstart) | |
815 | /* do nothing */ ; | |
816 | ||
817 | /* Is this register completely within the range the user is writing? */ | |
818 | else if (myregstart <= regstart && regend <= myregend) | |
4caf0990 | 819 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
32178cab MS |
820 | |
821 | /* The register partially overlaps the range being written. */ | |
822 | else | |
823 | { | |
2d522557 | 824 | gdb_byte regbuf[MAX_REGISTER_SIZE]; |
32178cab MS |
825 | /* What's the overlap between this register's bytes and |
826 | those the caller wants to write? */ | |
827 | int overlapstart = max (regstart, myregstart); | |
828 | int overlapend = min (regend, myregend); | |
829 | ||
830 | /* We may be doing a partial update of an invalid register. | |
831 | Update it from the target before scribbling on it. */ | |
4caf0990 | 832 | deprecated_read_register_gen (regnum, regbuf); |
32178cab | 833 | |
5c27f28a | 834 | target_store_registers (regnum); |
32178cab MS |
835 | } |
836 | } | |
837 | } | |
838 | ||
06c0b04e AC |
839 | /* Perform a partial register transfer using a read, modify, write |
840 | operation. */ | |
841 | ||
842 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
843 | void *buf); | |
844 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
845 | const void *buf); | |
846 | ||
b9362cc7 | 847 | static void |
06c0b04e AC |
848 | regcache_xfer_part (struct regcache *regcache, int regnum, |
849 | int offset, int len, void *in, const void *out, | |
2d522557 AC |
850 | void (*read) (struct regcache *regcache, int regnum, |
851 | gdb_byte *buf), | |
852 | void (*write) (struct regcache *regcache, int regnum, | |
853 | const gdb_byte *buf)) | |
06c0b04e AC |
854 | { |
855 | struct regcache_descr *descr = regcache->descr; | |
fc1a4b47 | 856 | gdb_byte reg[MAX_REGISTER_SIZE]; |
06c0b04e AC |
857 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
858 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
859 | /* Something to do? */ | |
860 | if (offset + len == 0) | |
861 | return; | |
862 | /* Read (when needed) ... */ | |
863 | if (in != NULL | |
864 | || offset > 0 | |
865 | || offset + len < descr->sizeof_register[regnum]) | |
866 | { | |
867 | gdb_assert (read != NULL); | |
868 | read (regcache, regnum, reg); | |
869 | } | |
870 | /* ... modify ... */ | |
871 | if (in != NULL) | |
872 | memcpy (in, reg + offset, len); | |
873 | if (out != NULL) | |
874 | memcpy (reg + offset, out, len); | |
875 | /* ... write (when needed). */ | |
876 | if (out != NULL) | |
877 | { | |
878 | gdb_assert (write != NULL); | |
879 | write (regcache, regnum, reg); | |
880 | } | |
881 | } | |
882 | ||
883 | void | |
884 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
2d522557 | 885 | int offset, int len, gdb_byte *buf) |
06c0b04e AC |
886 | { |
887 | struct regcache_descr *descr = regcache->descr; | |
888 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
889 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
890 | regcache_raw_read, regcache_raw_write); | |
891 | } | |
892 | ||
893 | void | |
894 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 895 | int offset, int len, const gdb_byte *buf) |
06c0b04e AC |
896 | { |
897 | struct regcache_descr *descr = regcache->descr; | |
898 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
899 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
900 | regcache_raw_read, regcache_raw_write); | |
901 | } | |
902 | ||
903 | void | |
904 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
2d522557 | 905 | int offset, int len, gdb_byte *buf) |
06c0b04e AC |
906 | { |
907 | struct regcache_descr *descr = regcache->descr; | |
908 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
909 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
910 | regcache_cooked_read, regcache_cooked_write); | |
911 | } | |
912 | ||
913 | void | |
914 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 915 | int offset, int len, const gdb_byte *buf) |
06c0b04e AC |
916 | { |
917 | struct regcache_descr *descr = regcache->descr; | |
918 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
919 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
920 | regcache_cooked_read, regcache_cooked_write); | |
921 | } | |
32178cab | 922 | |
d3b22ed5 AC |
923 | /* Hack to keep code that view the register buffer as raw bytes |
924 | working. */ | |
925 | ||
926 | int | |
927 | register_offset_hack (struct gdbarch *gdbarch, int regnum) | |
928 | { | |
929 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
930 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
931 | return descr->register_offset[regnum]; | |
932 | } | |
933 | ||
f42accbe AC |
934 | /* Hack to keep code using register_bytes working. */ |
935 | ||
936 | int | |
937 | deprecated_register_bytes (void) | |
938 | { | |
939 | return current_regcache->descr->sizeof_raw_registers; | |
940 | } | |
941 | ||
5ebd2499 | 942 | /* Return the contents of register REGNUM as an unsigned integer. */ |
32178cab | 943 | |
173155e8 | 944 | ULONGEST |
5ebd2499 | 945 | read_register (int regnum) |
32178cab | 946 | { |
2d522557 | 947 | gdb_byte *buf = alloca (register_size (current_gdbarch, regnum)); |
4caf0990 | 948 | deprecated_read_register_gen (regnum, buf); |
3acba339 | 949 | return (extract_unsigned_integer (buf, register_size (current_gdbarch, regnum))); |
32178cab MS |
950 | } |
951 | ||
173155e8 | 952 | ULONGEST |
39f77062 | 953 | read_register_pid (int regnum, ptid_t ptid) |
32178cab | 954 | { |
39f77062 | 955 | ptid_t save_ptid; |
32178cab MS |
956 | int save_pid; |
957 | CORE_ADDR retval; | |
958 | ||
39f77062 | 959 | if (ptid_equal (ptid, inferior_ptid)) |
5ebd2499 | 960 | return read_register (regnum); |
32178cab | 961 | |
39f77062 | 962 | save_ptid = inferior_ptid; |
32178cab | 963 | |
39f77062 | 964 | inferior_ptid = ptid; |
32178cab | 965 | |
5ebd2499 | 966 | retval = read_register (regnum); |
32178cab | 967 | |
39f77062 | 968 | inferior_ptid = save_ptid; |
32178cab MS |
969 | |
970 | return retval; | |
971 | } | |
972 | ||
5ebd2499 | 973 | /* Store VALUE into the raw contents of register number REGNUM. */ |
32178cab MS |
974 | |
975 | void | |
5ebd2499 | 976 | write_register (int regnum, LONGEST val) |
32178cab | 977 | { |
61a0eb5b | 978 | void *buf; |
32178cab | 979 | int size; |
3acba339 | 980 | size = register_size (current_gdbarch, regnum); |
32178cab MS |
981 | buf = alloca (size); |
982 | store_signed_integer (buf, size, (LONGEST) val); | |
4caf0990 | 983 | deprecated_write_register_gen (regnum, buf); |
32178cab MS |
984 | } |
985 | ||
986 | void | |
39f77062 | 987 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
32178cab | 988 | { |
39f77062 | 989 | ptid_t save_ptid; |
32178cab | 990 | |
39f77062 | 991 | if (ptid_equal (ptid, inferior_ptid)) |
32178cab | 992 | { |
5ebd2499 | 993 | write_register (regnum, val); |
32178cab MS |
994 | return; |
995 | } | |
996 | ||
39f77062 | 997 | save_ptid = inferior_ptid; |
32178cab | 998 | |
39f77062 | 999 | inferior_ptid = ptid; |
32178cab | 1000 | |
5ebd2499 | 1001 | write_register (regnum, val); |
32178cab | 1002 | |
39f77062 | 1003 | inferior_ptid = save_ptid; |
32178cab MS |
1004 | } |
1005 | ||
a16d75cc | 1006 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
9a661b68 MK |
1007 | |
1008 | void | |
6618125d | 1009 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
9a661b68 MK |
1010 | { |
1011 | void *regbuf; | |
1012 | size_t size; | |
1013 | ||
a16d75cc | 1014 | gdb_assert (regcache != NULL); |
9a661b68 MK |
1015 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
1016 | gdb_assert (!regcache->readonly_p); | |
1017 | ||
1018 | /* FIXME: kettenis/20030828: It shouldn't be necessary to handle | |
1019 | CURRENT_REGCACHE specially here. */ | |
1020 | if (regcache == current_regcache | |
1021 | && !ptid_equal (registers_ptid, inferior_ptid)) | |
1022 | { | |
1023 | registers_changed (); | |
1024 | registers_ptid = inferior_ptid; | |
1025 | } | |
1026 | ||
1027 | regbuf = register_buffer (regcache, regnum); | |
1028 | size = regcache->descr->sizeof_register[regnum]; | |
1029 | ||
1030 | if (buf) | |
1031 | memcpy (regbuf, buf, size); | |
1032 | else | |
1033 | memset (regbuf, 0, size); | |
1034 | ||
1035 | /* Mark the register as cached. */ | |
1036 | regcache->register_valid_p[regnum] = 1; | |
1037 | } | |
1038 | ||
1039 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ | |
1040 | ||
1041 | void | |
6618125d | 1042 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
9a661b68 MK |
1043 | { |
1044 | const void *regbuf; | |
1045 | size_t size; | |
1046 | ||
1047 | gdb_assert (regcache != NULL && buf != NULL); | |
1048 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
1049 | ||
1050 | regbuf = register_buffer (regcache, regnum); | |
1051 | size = regcache->descr->sizeof_register[regnum]; | |
1052 | memcpy (buf, regbuf, size); | |
1053 | } | |
1054 | ||
193cb69f | 1055 | |
9c8dbfa9 AC |
1056 | /* read_pc, write_pc, read_sp, etc. Special handling for registers |
1057 | PC, SP, and FP. */ | |
32178cab | 1058 | |
9c8dbfa9 AC |
1059 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc() and |
1060 | read_sp(), will eventually be replaced by per-frame methods. | |
1061 | Instead of relying on the global INFERIOR_PTID, they will use the | |
1062 | contextual information provided by the FRAME. These functions do | |
1063 | not belong in the register cache. */ | |
32178cab | 1064 | |
cde9ea48 | 1065 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
9c8dbfa9 AC |
1066 | write_pc_pid() and write_pc(), all need to be replaced by something |
1067 | that does not rely on global state. But what? */ | |
32178cab MS |
1068 | |
1069 | CORE_ADDR | |
39f77062 | 1070 | read_pc_pid (ptid_t ptid) |
32178cab | 1071 | { |
39f77062 | 1072 | ptid_t saved_inferior_ptid; |
32178cab MS |
1073 | CORE_ADDR pc_val; |
1074 | ||
39f77062 KB |
1075 | /* In case ptid != inferior_ptid. */ |
1076 | saved_inferior_ptid = inferior_ptid; | |
1077 | inferior_ptid = ptid; | |
32178cab | 1078 | |
cde9ea48 AC |
1079 | if (TARGET_READ_PC_P ()) |
1080 | pc_val = TARGET_READ_PC (ptid); | |
1081 | /* Else use per-frame method on get_current_frame. */ | |
1082 | else if (PC_REGNUM >= 0) | |
1083 | { | |
1084 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); | |
6ba34a8d | 1085 | pc_val = ADDR_BITS_REMOVE (raw_val); |
cde9ea48 AC |
1086 | } |
1087 | else | |
e2e0b3e5 | 1088 | internal_error (__FILE__, __LINE__, _("read_pc_pid: Unable to find PC")); |
32178cab | 1089 | |
39f77062 | 1090 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1091 | return pc_val; |
1092 | } | |
1093 | ||
1094 | CORE_ADDR | |
1095 | read_pc (void) | |
1096 | { | |
39f77062 | 1097 | return read_pc_pid (inferior_ptid); |
32178cab MS |
1098 | } |
1099 | ||
32178cab | 1100 | void |
39f77062 | 1101 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1102 | { |
32178cab | 1103 | if (PC_REGNUM >= 0) |
39f77062 | 1104 | write_register_pid (PC_REGNUM, pc, ptid); |
afb18d0f AC |
1105 | else |
1106 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 1107 | _("generic_target_write_pc")); |
32178cab MS |
1108 | } |
1109 | ||
1110 | void | |
39f77062 | 1111 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1112 | { |
39f77062 | 1113 | ptid_t saved_inferior_ptid; |
32178cab | 1114 | |
39f77062 KB |
1115 | /* In case ptid != inferior_ptid. */ |
1116 | saved_inferior_ptid = inferior_ptid; | |
1117 | inferior_ptid = ptid; | |
32178cab | 1118 | |
39f77062 | 1119 | TARGET_WRITE_PC (pc, ptid); |
32178cab | 1120 | |
39f77062 | 1121 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1122 | } |
1123 | ||
1124 | void | |
1125 | write_pc (CORE_ADDR pc) | |
1126 | { | |
39f77062 | 1127 | write_pc_pid (pc, inferior_ptid); |
32178cab MS |
1128 | } |
1129 | ||
1130 | /* Cope with strage ways of getting to the stack and frame pointers */ | |
1131 | ||
32178cab MS |
1132 | CORE_ADDR |
1133 | read_sp (void) | |
1134 | { | |
bd1ce8ba AC |
1135 | if (TARGET_READ_SP_P ()) |
1136 | return TARGET_READ_SP (); | |
a9e5fdc2 AC |
1137 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
1138 | return get_frame_sp (get_current_frame ()); | |
bd1ce8ba | 1139 | else if (SP_REGNUM >= 0) |
a9e5fdc2 AC |
1140 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
1141 | about the architecture so put it at the end. */ | |
bd1ce8ba | 1142 | return read_register (SP_REGNUM); |
e2e0b3e5 | 1143 | internal_error (__FILE__, __LINE__, _("read_sp: Unable to find SP")); |
32178cab MS |
1144 | } |
1145 | ||
705152c5 MS |
1146 | static void |
1147 | reg_flush_command (char *command, int from_tty) | |
1148 | { | |
1149 | /* Force-flush the register cache. */ | |
1150 | registers_changed (); | |
1151 | if (from_tty) | |
a3f17187 | 1152 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1153 | } |
1154 | ||
32178cab MS |
1155 | static void |
1156 | build_regcache (void) | |
3fadccb3 AC |
1157 | { |
1158 | current_regcache = regcache_xmalloc (current_gdbarch); | |
2d28509a | 1159 | current_regcache->readonly_p = 0; |
3fadccb3 AC |
1160 | } |
1161 | ||
af030b9a AC |
1162 | static void |
1163 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
1164 | const unsigned char *buf, long len) | |
1165 | { | |
1166 | int i; | |
1167 | switch (endian) | |
1168 | { | |
1169 | case BFD_ENDIAN_BIG: | |
1170 | for (i = 0; i < len; i++) | |
1171 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1172 | break; | |
1173 | case BFD_ENDIAN_LITTLE: | |
1174 | for (i = len - 1; i >= 0; i--) | |
1175 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1176 | break; | |
1177 | default: | |
e2e0b3e5 | 1178 | internal_error (__FILE__, __LINE__, _("Bad switch")); |
af030b9a AC |
1179 | } |
1180 | } | |
1181 | ||
1182 | enum regcache_dump_what | |
1183 | { | |
b59ff9d5 | 1184 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
af030b9a AC |
1185 | }; |
1186 | ||
1187 | static void | |
1188 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1189 | enum regcache_dump_what what_to_dump) | |
1190 | { | |
1191 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 | 1192 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
af030b9a AC |
1193 | int regnum; |
1194 | int footnote_nr = 0; | |
1195 | int footnote_register_size = 0; | |
1196 | int footnote_register_offset = 0; | |
1197 | int footnote_register_type_name_null = 0; | |
1198 | long register_offset = 0; | |
123a958e | 1199 | unsigned char buf[MAX_REGISTER_SIZE]; |
af030b9a AC |
1200 | |
1201 | #if 0 | |
af030b9a AC |
1202 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
1203 | regcache->descr->nr_raw_registers); | |
1204 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1205 | regcache->descr->nr_cooked_registers); | |
1206 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1207 | regcache->descr->sizeof_raw_registers); | |
1208 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1209 | regcache->descr->sizeof_raw_register_valid_p); | |
af030b9a AC |
1210 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
1211 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); | |
1212 | #endif | |
1213 | ||
1214 | gdb_assert (regcache->descr->nr_cooked_registers | |
1215 | == (NUM_REGS + NUM_PSEUDO_REGS)); | |
1216 | ||
1217 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1218 | { | |
1219 | /* Name. */ | |
1220 | if (regnum < 0) | |
1221 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1222 | else | |
1223 | { | |
1224 | const char *p = REGISTER_NAME (regnum); | |
1225 | if (p == NULL) | |
1226 | p = ""; | |
1227 | else if (p[0] == '\0') | |
1228 | p = "''"; | |
1229 | fprintf_unfiltered (file, " %-10s", p); | |
1230 | } | |
1231 | ||
1232 | /* Number. */ | |
1233 | if (regnum < 0) | |
1234 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1235 | else | |
1236 | fprintf_unfiltered (file, " %4d", regnum); | |
1237 | ||
1238 | /* Relative number. */ | |
1239 | if (regnum < 0) | |
1240 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1241 | else if (regnum < NUM_REGS) | |
1242 | fprintf_unfiltered (file, " %4d", regnum); | |
1243 | else | |
1244 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); | |
1245 | ||
1246 | /* Offset. */ | |
1247 | if (regnum < 0) | |
1248 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1249 | else | |
1250 | { | |
1251 | fprintf_unfiltered (file, " %6ld", | |
1252 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1253 | if (register_offset != regcache->descr->register_offset[regnum] |
62700349 | 1254 | || register_offset != DEPRECATED_REGISTER_BYTE (regnum) |
d3b22ed5 AC |
1255 | || (regnum > 0 |
1256 | && (regcache->descr->register_offset[regnum] | |
1257 | != (regcache->descr->register_offset[regnum - 1] | |
1258 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1259 | ) | |
af030b9a AC |
1260 | { |
1261 | if (!footnote_register_offset) | |
1262 | footnote_register_offset = ++footnote_nr; | |
1263 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1264 | } | |
1265 | else | |
1266 | fprintf_unfiltered (file, " "); | |
1267 | register_offset = (regcache->descr->register_offset[regnum] | |
1268 | + regcache->descr->sizeof_register[regnum]); | |
1269 | } | |
1270 | ||
1271 | /* Size. */ | |
1272 | if (regnum < 0) | |
1273 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1274 | else | |
01e1877c AC |
1275 | fprintf_unfiltered (file, " %5ld", |
1276 | regcache->descr->sizeof_register[regnum]); | |
af030b9a AC |
1277 | |
1278 | /* Type. */ | |
b59ff9d5 AC |
1279 | { |
1280 | const char *t; | |
1281 | if (regnum < 0) | |
1282 | t = "Type"; | |
1283 | else | |
1284 | { | |
1285 | static const char blt[] = "builtin_type"; | |
1286 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); | |
1287 | if (t == NULL) | |
1288 | { | |
1289 | char *n; | |
1290 | if (!footnote_register_type_name_null) | |
1291 | footnote_register_type_name_null = ++footnote_nr; | |
b435e160 | 1292 | n = xstrprintf ("*%d", footnote_register_type_name_null); |
b59ff9d5 AC |
1293 | make_cleanup (xfree, n); |
1294 | t = n; | |
1295 | } | |
1296 | /* Chop a leading builtin_type. */ | |
1297 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1298 | t += strlen (blt); | |
1299 | } | |
1300 | fprintf_unfiltered (file, " %-15s", t); | |
1301 | } | |
1302 | ||
1303 | /* Leading space always present. */ | |
1304 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1305 | |
1306 | /* Value, raw. */ | |
1307 | if (what_to_dump == regcache_dump_raw) | |
1308 | { | |
1309 | if (regnum < 0) | |
1310 | fprintf_unfiltered (file, "Raw value"); | |
1311 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1312 | fprintf_unfiltered (file, "<cooked>"); | |
1313 | else if (!regcache_valid_p (regcache, regnum)) | |
1314 | fprintf_unfiltered (file, "<invalid>"); | |
1315 | else | |
1316 | { | |
1317 | regcache_raw_read (regcache, regnum, buf); | |
1318 | fprintf_unfiltered (file, "0x"); | |
1319 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
01e1877c | 1320 | regcache->descr->sizeof_register[regnum]); |
af030b9a AC |
1321 | } |
1322 | } | |
1323 | ||
1324 | /* Value, cooked. */ | |
1325 | if (what_to_dump == regcache_dump_cooked) | |
1326 | { | |
1327 | if (regnum < 0) | |
1328 | fprintf_unfiltered (file, "Cooked value"); | |
1329 | else | |
1330 | { | |
1331 | regcache_cooked_read (regcache, regnum, buf); | |
1332 | fprintf_unfiltered (file, "0x"); | |
1333 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
01e1877c | 1334 | regcache->descr->sizeof_register[regnum]); |
af030b9a AC |
1335 | } |
1336 | } | |
1337 | ||
b59ff9d5 AC |
1338 | /* Group members. */ |
1339 | if (what_to_dump == regcache_dump_groups) | |
1340 | { | |
1341 | if (regnum < 0) | |
1342 | fprintf_unfiltered (file, "Groups"); | |
1343 | else | |
1344 | { | |
b59ff9d5 | 1345 | const char *sep = ""; |
6c7d17ba AC |
1346 | struct reggroup *group; |
1347 | for (group = reggroup_next (gdbarch, NULL); | |
1348 | group != NULL; | |
1349 | group = reggroup_next (gdbarch, group)) | |
b59ff9d5 | 1350 | { |
6c7d17ba | 1351 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
b59ff9d5 | 1352 | { |
6c7d17ba | 1353 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group)); |
b59ff9d5 AC |
1354 | sep = ","; |
1355 | } | |
1356 | } | |
1357 | } | |
1358 | } | |
1359 | ||
af030b9a AC |
1360 | fprintf_unfiltered (file, "\n"); |
1361 | } | |
1362 | ||
1363 | if (footnote_register_size) | |
1364 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1365 | footnote_register_size); | |
1366 | if (footnote_register_offset) | |
1367 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1368 | footnote_register_offset); | |
1369 | if (footnote_register_type_name_null) | |
1370 | fprintf_unfiltered (file, | |
1371 | "*%d: Register type's name NULL.\n", | |
1372 | footnote_register_type_name_null); | |
1373 | do_cleanups (cleanups); | |
1374 | } | |
1375 | ||
1376 | static void | |
1377 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1378 | { | |
1379 | if (args == NULL) | |
1380 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); | |
1381 | else | |
1382 | { | |
1383 | struct ui_file *file = gdb_fopen (args, "w"); | |
1384 | if (file == NULL) | |
e2e0b3e5 | 1385 | perror_with_name (_("maintenance print architecture")); |
af030b9a AC |
1386 | regcache_dump (current_regcache, file, what_to_dump); |
1387 | ui_file_delete (file); | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | static void | |
1392 | maintenance_print_registers (char *args, int from_tty) | |
1393 | { | |
1394 | regcache_print (args, regcache_dump_none); | |
1395 | } | |
1396 | ||
1397 | static void | |
1398 | maintenance_print_raw_registers (char *args, int from_tty) | |
1399 | { | |
1400 | regcache_print (args, regcache_dump_raw); | |
1401 | } | |
1402 | ||
1403 | static void | |
1404 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1405 | { | |
1406 | regcache_print (args, regcache_dump_cooked); | |
1407 | } | |
1408 | ||
b59ff9d5 AC |
1409 | static void |
1410 | maintenance_print_register_groups (char *args, int from_tty) | |
1411 | { | |
1412 | regcache_print (args, regcache_dump_groups); | |
1413 | } | |
1414 | ||
b9362cc7 AC |
1415 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
1416 | ||
32178cab MS |
1417 | void |
1418 | _initialize_regcache (void) | |
1419 | { | |
030f20e1 | 1420 | regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr); |
046a4708 | 1421 | DEPRECATED_REGISTER_GDBARCH_SWAP (current_regcache); |
046a4708 | 1422 | deprecated_register_gdbarch_swap (NULL, 0, build_regcache); |
705152c5 | 1423 | |
f4c5303c OF |
1424 | observer_attach_target_changed (regcache_observer_target_changed); |
1425 | ||
705152c5 | 1426 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1bedd215 | 1427 | _("Force gdb to flush its register cache (maintainer command)")); |
39f77062 KB |
1428 | |
1429 | /* Initialize the thread/process associated with the current set of | |
1430 | registers. For now, -1 is special, and means `no current process'. */ | |
1431 | registers_ptid = pid_to_ptid (-1); | |
af030b9a | 1432 | |
1a966eab AC |
1433 | add_cmd ("registers", class_maintenance, maintenance_print_registers, _("\ |
1434 | Print the internal register configuration.\n\ | |
1435 | Takes an optional file parameter."), &maintenanceprintlist); | |
af030b9a | 1436 | add_cmd ("raw-registers", class_maintenance, |
1a966eab AC |
1437 | maintenance_print_raw_registers, _("\ |
1438 | Print the internal register configuration including raw values.\n\ | |
1439 | Takes an optional file parameter."), &maintenanceprintlist); | |
af030b9a | 1440 | add_cmd ("cooked-registers", class_maintenance, |
1a966eab AC |
1441 | maintenance_print_cooked_registers, _("\ |
1442 | Print the internal register configuration including cooked values.\n\ | |
1443 | Takes an optional file parameter."), &maintenanceprintlist); | |
b59ff9d5 | 1444 | add_cmd ("register-groups", class_maintenance, |
1a966eab AC |
1445 | maintenance_print_register_groups, _("\ |
1446 | Print the internal register configuration including each register's group.\n\ | |
1447 | Takes an optional file parameter."), | |
af030b9a AC |
1448 | &maintenanceprintlist); |
1449 | ||
32178cab | 1450 | } |