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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 AC |
2 | |
3 | Copyright 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 | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
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 | |
54 | registers then those regigisters and not the PC lives in the raw | |
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). */ | |
188 | char *registers; | |
189 | char *register_valid_p; | |
2d28509a AC |
190 | /* Is this a read-only cache? A read-only cache is used for saving |
191 | the target's register state (e.g, across an inferior function | |
192 | call or just before forcing a function return). A read-only | |
193 | cache can only be updated via the methods regcache_dup() and | |
194 | regcache_cpy(). The actual contents are determined by the | |
195 | reggroup_save and reggroup_restore methods. */ | |
196 | int readonly_p; | |
3fadccb3 AC |
197 | }; |
198 | ||
199 | struct regcache * | |
200 | regcache_xmalloc (struct gdbarch *gdbarch) | |
201 | { | |
202 | struct regcache_descr *descr; | |
203 | struct regcache *regcache; | |
204 | gdb_assert (gdbarch != NULL); | |
205 | descr = regcache_descr (gdbarch); | |
206 | regcache = XMALLOC (struct regcache); | |
207 | regcache->descr = descr; | |
51b1fe4e | 208 | regcache->registers |
3fadccb3 | 209 | = XCALLOC (descr->sizeof_raw_registers, char); |
51b1fe4e | 210 | regcache->register_valid_p |
3fadccb3 | 211 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
2d28509a | 212 | regcache->readonly_p = 1; |
3fadccb3 AC |
213 | return regcache; |
214 | } | |
215 | ||
216 | void | |
217 | regcache_xfree (struct regcache *regcache) | |
218 | { | |
219 | if (regcache == NULL) | |
220 | return; | |
51b1fe4e AC |
221 | xfree (regcache->registers); |
222 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
223 | xfree (regcache); |
224 | } | |
225 | ||
b9362cc7 | 226 | static void |
36160dc4 AC |
227 | do_regcache_xfree (void *data) |
228 | { | |
229 | regcache_xfree (data); | |
230 | } | |
231 | ||
232 | struct cleanup * | |
233 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
234 | { | |
235 | return make_cleanup (do_regcache_xfree, regcache); | |
236 | } | |
237 | ||
41d35cb0 MK |
238 | /* Return REGCACHE's architecture. */ |
239 | ||
240 | struct gdbarch * | |
241 | get_regcache_arch (const struct regcache *regcache) | |
242 | { | |
243 | return regcache->descr->gdbarch; | |
244 | } | |
245 | ||
51b1fe4e AC |
246 | /* Return a pointer to register REGNUM's buffer cache. */ |
247 | ||
248 | static char * | |
9a661b68 | 249 | register_buffer (const struct regcache *regcache, int regnum) |
51b1fe4e AC |
250 | { |
251 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
252 | } | |
253 | ||
2d28509a | 254 | void |
5602984a AC |
255 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
256 | void *src) | |
2d28509a AC |
257 | { |
258 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 259 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 260 | int regnum; |
2d28509a | 261 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 262 | end up trying to write the register values back out to the |
2d28509a | 263 | target. */ |
2d28509a AC |
264 | gdb_assert (dst->readonly_p); |
265 | /* Clear the dest. */ | |
266 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
267 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); | |
268 | /* Copy over any registers (identified by their membership in the | |
5602984a AC |
269 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
270 | NUM_PSEUDO_REGS) range is checked since some architectures need | |
271 | to save/restore `cooked' registers that live in memory. */ | |
2d28509a AC |
272 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
273 | { | |
274 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
275 | { | |
5602984a AC |
276 | int valid = cooked_read (src, regnum, buf); |
277 | if (valid) | |
278 | { | |
279 | memcpy (register_buffer (dst, regnum), buf, | |
280 | register_size (gdbarch, regnum)); | |
281 | dst->register_valid_p[regnum] = 1; | |
282 | } | |
2d28509a AC |
283 | } |
284 | } | |
285 | } | |
286 | ||
287 | void | |
5602984a AC |
288 | regcache_restore (struct regcache *dst, |
289 | regcache_cooked_read_ftype *cooked_read, | |
290 | void *src) | |
2d28509a AC |
291 | { |
292 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 293 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 294 | int regnum; |
5602984a AC |
295 | /* The dst had better not be read-only. If it is, the `restore' |
296 | doesn't make much sense. */ | |
2d28509a | 297 | gdb_assert (!dst->readonly_p); |
2d28509a | 298 | /* Copy over any registers, being careful to only restore those that |
5602984a AC |
299 | were both saved and need to be restored. The full [0 .. NUM_REGS |
300 | + NUM_PSEUDO_REGS) range is checked since some architectures need | |
301 | to save/restore `cooked' registers that live in memory. */ | |
302 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 303 | { |
5602984a | 304 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 305 | { |
5602984a AC |
306 | int valid = cooked_read (src, regnum, buf); |
307 | if (valid) | |
308 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
309 | } |
310 | } | |
311 | } | |
312 | ||
5602984a AC |
313 | static int |
314 | do_cooked_read (void *src, int regnum, void *buf) | |
315 | { | |
316 | struct regcache *regcache = src; | |
6f4e5a41 | 317 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
5602984a AC |
318 | /* Don't even think about fetching a register from a read-only |
319 | cache when the register isn't yet valid. There isn't a target | |
320 | from which the register value can be fetched. */ | |
321 | return 0; | |
322 | regcache_cooked_read (regcache, regnum, buf); | |
323 | return 1; | |
324 | } | |
325 | ||
326 | ||
3fadccb3 AC |
327 | void |
328 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
329 | { | |
330 | int i; | |
331 | char *buf; | |
332 | gdb_assert (src != NULL && dst != NULL); | |
333 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
334 | gdb_assert (src != dst); | |
2d28509a AC |
335 | gdb_assert (src->readonly_p || dst->readonly_p); |
336 | if (!src->readonly_p) | |
5602984a | 337 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 338 | else if (!dst->readonly_p) |
5602984a | 339 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
340 | else |
341 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
342 | } |
343 | ||
344 | void | |
345 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
346 | { | |
347 | int i; | |
348 | gdb_assert (src != NULL && dst != NULL); | |
349 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
350 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
351 | move of data into the current_regcache(). Doing this would be | |
9564ee9f | 352 | silly - it would mean that valid_p would be completely invalid. */ |
3fadccb3 | 353 | gdb_assert (dst != current_regcache); |
51b1fe4e AC |
354 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
355 | memcpy (dst->register_valid_p, src->register_valid_p, | |
3fadccb3 AC |
356 | dst->descr->sizeof_raw_register_valid_p); |
357 | } | |
358 | ||
359 | struct regcache * | |
360 | regcache_dup (struct regcache *src) | |
361 | { | |
362 | struct regcache *newbuf; | |
363 | gdb_assert (current_regcache != NULL); | |
364 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
365 | regcache_cpy (newbuf, src); | |
366 | return newbuf; | |
367 | } | |
368 | ||
369 | struct regcache * | |
370 | regcache_dup_no_passthrough (struct regcache *src) | |
371 | { | |
372 | struct regcache *newbuf; | |
373 | gdb_assert (current_regcache != NULL); | |
374 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
375 | regcache_cpy_no_passthrough (newbuf, src); | |
376 | return newbuf; | |
377 | } | |
378 | ||
379 | int | |
380 | regcache_valid_p (struct regcache *regcache, int regnum) | |
381 | { | |
382 | gdb_assert (regcache != NULL); | |
383 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
51b1fe4e | 384 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
385 | } |
386 | ||
3fadccb3 AC |
387 | char * |
388 | deprecated_grub_regcache_for_registers (struct regcache *regcache) | |
389 | { | |
51b1fe4e | 390 | return regcache->registers; |
3fadccb3 AC |
391 | } |
392 | ||
3fadccb3 AC |
393 | /* Global structure containing the current regcache. */ |
394 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and | |
8262ee23 | 395 | deprecated_register_valid[] currently point into this structure. */ |
3fadccb3 AC |
396 | struct regcache *current_regcache; |
397 | ||
5ebd2499 | 398 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
399 | recording if the register values have been changed (eg. by the |
400 | user). Therefore all registers must be written back to the | |
401 | target when appropriate. */ | |
402 | ||
39f77062 | 403 | /* The thread/process associated with the current set of registers. */ |
32178cab | 404 | |
39f77062 | 405 | static ptid_t registers_ptid; |
32178cab MS |
406 | |
407 | /* | |
408 | * FUNCTIONS: | |
409 | */ | |
410 | ||
411 | /* REGISTER_CACHED() | |
412 | ||
413 | Returns 0 if the value is not in the cache (needs fetch). | |
414 | >0 if the value is in the cache. | |
415 | <0 if the value is permanently unavailable (don't ask again). */ | |
416 | ||
417 | int | |
418 | register_cached (int regnum) | |
419 | { | |
8851ec7a | 420 | return current_regcache->register_valid_p[regnum]; |
32178cab MS |
421 | } |
422 | ||
7302a204 ND |
423 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
424 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ | |
425 | ||
426 | void | |
427 | set_register_cached (int regnum, int state) | |
428 | { | |
53826de9 AC |
429 | gdb_assert (regnum >= 0); |
430 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); | |
51b1fe4e | 431 | current_regcache->register_valid_p[regnum] = state; |
7302a204 ND |
432 | } |
433 | ||
f4c5303c OF |
434 | /* Observer for the target_changed event. */ |
435 | ||
436 | void | |
437 | regcache_observer_target_changed (struct target_ops *target) | |
438 | { | |
439 | registers_changed (); | |
440 | } | |
441 | ||
32178cab MS |
442 | /* Low level examining and depositing of registers. |
443 | ||
444 | The caller is responsible for making sure that the inferior is | |
445 | stopped before calling the fetching routines, or it will get | |
446 | garbage. (a change from GDB version 3, in which the caller got the | |
447 | value from the last stop). */ | |
448 | ||
449 | /* REGISTERS_CHANGED () | |
450 | ||
451 | Indicate that registers may have changed, so invalidate the cache. */ | |
452 | ||
453 | void | |
454 | registers_changed (void) | |
455 | { | |
456 | int i; | |
32178cab | 457 | |
39f77062 | 458 | registers_ptid = pid_to_ptid (-1); |
32178cab MS |
459 | |
460 | /* Force cleanup of any alloca areas if using C alloca instead of | |
461 | a builtin alloca. This particular call is used to clean up | |
462 | areas allocated by low level target code which may build up | |
463 | during lengthy interactions between gdb and the target before | |
464 | gdb gives control to the user (ie watchpoints). */ | |
465 | alloca (0); | |
466 | ||
53826de9 | 467 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
7302a204 | 468 | set_register_cached (i, 0); |
32178cab | 469 | |
9a4105ab AC |
470 | if (deprecated_registers_changed_hook) |
471 | deprecated_registers_changed_hook (); | |
32178cab MS |
472 | } |
473 | ||
2b9e5f3f | 474 | /* DEPRECATED_REGISTERS_FETCHED () |
32178cab MS |
475 | |
476 | Indicate that all registers have been fetched, so mark them all valid. */ | |
477 | ||
31e9866e AC |
478 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target |
479 | code was blatting the registers[] array and then calling this. | |
23a6d369 | 480 | Since targets should only be using regcache_raw_supply() the need for |
31e9866e | 481 | this function/hack is eliminated. */ |
32178cab MS |
482 | |
483 | void | |
2b9e5f3f | 484 | deprecated_registers_fetched (void) |
32178cab MS |
485 | { |
486 | int i; | |
32178cab | 487 | |
a728f042 | 488 | for (i = 0; i < NUM_REGS; i++) |
7302a204 | 489 | set_register_cached (i, 1); |
fcdc5976 | 490 | /* Do not assume that the pseudo-regs have also been fetched. |
31e9866e | 491 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
32178cab MS |
492 | } |
493 | ||
73937e03 AC |
494 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
495 | are generally a *BAD* idea. They are inefficient because they need | |
496 | to check for partial updates, which can only be done by scanning | |
497 | through all of the registers and seeing if the bytes that are being | |
498 | read/written fall inside of an invalid register. [The main reason | |
499 | this is necessary is that register sizes can vary, so a simple | |
500 | index won't suffice.] It is far better to call read_register_gen | |
501 | and write_register_gen if you want to get at the raw register | |
502 | contents, as it only takes a regnum as an argument, and therefore | |
503 | can't do a partial register update. | |
32178cab MS |
504 | |
505 | Prior to the recent fixes to check for partial updates, both read | |
73937e03 AC |
506 | and deprecated_write_register_bytes always checked to see if any |
507 | registers were stale, and then called target_fetch_registers (-1) | |
508 | to update the whole set. This caused really slowed things down for | |
509 | remote targets. */ | |
32178cab MS |
510 | |
511 | /* Copy INLEN bytes of consecutive data from registers | |
512 | starting with the INREGBYTE'th byte of register data | |
513 | into memory at MYADDR. */ | |
514 | ||
515 | void | |
73937e03 | 516 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
32178cab | 517 | { |
61a0eb5b | 518 | int in_end = in_start + in_len; |
5ebd2499 | 519 | int regnum; |
d9d9c31f | 520 | char reg_buf[MAX_REGISTER_SIZE]; |
32178cab MS |
521 | |
522 | /* See if we are trying to read bytes from out-of-date registers. If so, | |
523 | update just those registers. */ | |
524 | ||
5ebd2499 | 525 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab | 526 | { |
61a0eb5b AC |
527 | int reg_start; |
528 | int reg_end; | |
529 | int reg_len; | |
530 | int start; | |
531 | int end; | |
532 | int byte; | |
32178cab | 533 | |
62700349 | 534 | reg_start = DEPRECATED_REGISTER_BYTE (regnum); |
3acba339 | 535 | reg_len = register_size (current_gdbarch, regnum); |
61a0eb5b | 536 | reg_end = reg_start + reg_len; |
32178cab | 537 | |
61a0eb5b | 538 | if (reg_end <= in_start || in_end <= reg_start) |
5ebd2499 | 539 | /* The range the user wants to read doesn't overlap with regnum. */ |
32178cab MS |
540 | continue; |
541 | ||
275f450c AC |
542 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
543 | /* Force the cache to fetch the entire register. */ | |
4caf0990 | 544 | deprecated_read_register_gen (regnum, reg_buf); |
32178cab | 545 | |
61a0eb5b AC |
546 | /* Legacy note: This function, for some reason, allows a NULL |
547 | input buffer. If the buffer is NULL, the registers are still | |
548 | fetched, just the final transfer is skipped. */ | |
549 | if (in_buf == NULL) | |
550 | continue; | |
551 | ||
552 | /* start = max (reg_start, in_start) */ | |
553 | if (reg_start > in_start) | |
554 | start = reg_start; | |
555 | else | |
556 | start = in_start; | |
557 | ||
558 | /* end = min (reg_end, in_end) */ | |
559 | if (reg_end < in_end) | |
560 | end = reg_end; | |
561 | else | |
562 | end = in_end; | |
563 | ||
564 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ | |
565 | for (byte = start; byte < end; byte++) | |
165cd47f | 566 | { |
61a0eb5b | 567 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
165cd47f | 568 | } |
32178cab | 569 | } |
32178cab MS |
570 | } |
571 | ||
61a0eb5b | 572 | void |
1aaa5f99 | 573 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
61a0eb5b | 574 | { |
3fadccb3 AC |
575 | gdb_assert (regcache != NULL && buf != NULL); |
576 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
3fadccb3 AC |
577 | /* Make certain that the register cache is up-to-date with respect |
578 | to the current thread. This switching shouldn't be necessary | |
579 | only there is still only one target side register cache. Sigh! | |
580 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 581 | if (!regcache->readonly_p) |
3fadccb3 AC |
582 | { |
583 | gdb_assert (regcache == current_regcache); | |
584 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
585 | { | |
586 | registers_changed (); | |
587 | registers_ptid = inferior_ptid; | |
588 | } | |
589 | if (!register_cached (regnum)) | |
5c27f28a | 590 | target_fetch_registers (regnum); |
0a8146bf AC |
591 | #if 0 |
592 | /* FIXME: cagney/2004-08-07: At present a number of targets | |
04c663e3 DA |
593 | forget (or didn't know that they needed) to set this leading to |
594 | panics. Also is the problem that targets need to indicate | |
0a8146bf AC |
595 | that a register is in one of the possible states: valid, |
596 | undefined, unknown. The last of which isn't yet | |
597 | possible. */ | |
7ab3286f | 598 | gdb_assert (register_cached (regnum)); |
0a8146bf | 599 | #endif |
3fadccb3 AC |
600 | } |
601 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 602 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 603 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
604 | } |
605 | ||
28fc6740 AC |
606 | void |
607 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
608 | { | |
609 | char *buf; | |
610 | gdb_assert (regcache != NULL); | |
611 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
612 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
613 | regcache_raw_read (regcache, regnum, buf); | |
614 | (*val) = extract_signed_integer (buf, | |
615 | regcache->descr->sizeof_register[regnum]); | |
616 | } | |
617 | ||
618 | void | |
619 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
620 | ULONGEST *val) | |
621 | { | |
622 | char *buf; | |
623 | gdb_assert (regcache != NULL); | |
624 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
625 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
626 | regcache_raw_read (regcache, regnum, buf); | |
627 | (*val) = extract_unsigned_integer (buf, | |
628 | regcache->descr->sizeof_register[regnum]); | |
629 | } | |
630 | ||
c00dcbe9 MK |
631 | void |
632 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
633 | { | |
634 | void *buf; | |
635 | gdb_assert (regcache != NULL); | |
636 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
637 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
638 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
639 | regcache_raw_write (regcache, regnum, buf); | |
640 | } | |
641 | ||
642 | void | |
643 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
644 | ULONGEST val) | |
645 | { | |
646 | void *buf; | |
647 | gdb_assert (regcache != NULL); | |
648 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
649 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
650 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
651 | regcache_raw_write (regcache, regnum, buf); | |
652 | } | |
653 | ||
61a0eb5b | 654 | void |
4caf0990 | 655 | deprecated_read_register_gen (int regnum, char *buf) |
61a0eb5b | 656 | { |
3fadccb3 AC |
657 | gdb_assert (current_regcache != NULL); |
658 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
68365089 AC |
659 | regcache_cooked_read (current_regcache, regnum, buf); |
660 | } | |
661 | ||
662 | void | |
29e1842b | 663 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
68365089 | 664 | { |
d138e37a | 665 | gdb_assert (regnum >= 0); |
68365089 AC |
666 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
667 | if (regnum < regcache->descr->nr_raw_registers) | |
668 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
669 | else if (regcache->readonly_p |
670 | && regnum < regcache->descr->nr_cooked_registers | |
671 | && regcache->register_valid_p[regnum]) | |
b2fa5097 | 672 | /* Read-only register cache, perhaps the cooked value was cached? */ |
2d28509a AC |
673 | memcpy (buf, register_buffer (regcache, regnum), |
674 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 675 | else |
68365089 AC |
676 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
677 | regnum, buf); | |
61a0eb5b AC |
678 | } |
679 | ||
a378f419 AC |
680 | void |
681 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
682 | LONGEST *val) | |
683 | { | |
684 | char *buf; | |
685 | gdb_assert (regcache != NULL); | |
a66a9c23 | 686 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
687 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
688 | regcache_cooked_read (regcache, regnum, buf); | |
689 | (*val) = extract_signed_integer (buf, | |
690 | regcache->descr->sizeof_register[regnum]); | |
691 | } | |
692 | ||
693 | void | |
694 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
695 | ULONGEST *val) | |
696 | { | |
697 | char *buf; | |
698 | gdb_assert (regcache != NULL); | |
a66a9c23 | 699 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
700 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
701 | regcache_cooked_read (regcache, regnum, buf); | |
702 | (*val) = extract_unsigned_integer (buf, | |
703 | regcache->descr->sizeof_register[regnum]); | |
704 | } | |
705 | ||
a66a9c23 AC |
706 | void |
707 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
708 | LONGEST val) | |
709 | { | |
710 | void *buf; | |
711 | gdb_assert (regcache != NULL); | |
712 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
713 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
714 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
715 | regcache_cooked_write (regcache, regnum, buf); | |
716 | } | |
717 | ||
718 | void | |
719 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
720 | ULONGEST val) | |
721 | { | |
722 | void *buf; | |
723 | gdb_assert (regcache != NULL); | |
724 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
725 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
726 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
727 | regcache_cooked_write (regcache, regnum, buf); | |
728 | } | |
729 | ||
61a0eb5b | 730 | void |
1aaa5f99 | 731 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
61a0eb5b | 732 | { |
3fadccb3 AC |
733 | gdb_assert (regcache != NULL && buf != NULL); |
734 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 735 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 736 | |
3fadccb3 AC |
737 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
738 | change the registers array if something writes to this register. */ | |
739 | if (CANNOT_STORE_REGISTER (regnum)) | |
740 | return; | |
741 | ||
3fadccb3 AC |
742 | /* Make certain that the correct cache is selected. */ |
743 | gdb_assert (regcache == current_regcache); | |
744 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
745 | { | |
746 | registers_changed (); | |
747 | registers_ptid = inferior_ptid; | |
748 | } | |
749 | ||
750 | /* If we have a valid copy of the register, and new value == old | |
751 | value, then don't bother doing the actual store. */ | |
752 | if (regcache_valid_p (regcache, regnum) | |
753 | && (memcmp (register_buffer (regcache, regnum), buf, | |
754 | regcache->descr->sizeof_register[regnum]) == 0)) | |
755 | return; | |
756 | ||
757 | target_prepare_to_store (); | |
758 | memcpy (register_buffer (regcache, regnum), buf, | |
759 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 760 | regcache->register_valid_p[regnum] = 1; |
5c27f28a | 761 | target_store_registers (regnum); |
61a0eb5b AC |
762 | } |
763 | ||
764 | void | |
4caf0990 | 765 | deprecated_write_register_gen (int regnum, char *buf) |
61a0eb5b | 766 | { |
3fadccb3 AC |
767 | gdb_assert (current_regcache != NULL); |
768 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
68365089 AC |
769 | regcache_cooked_write (current_regcache, regnum, buf); |
770 | } | |
771 | ||
772 | void | |
29e1842b | 773 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
68365089 | 774 | { |
d138e37a | 775 | gdb_assert (regnum >= 0); |
68365089 AC |
776 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
777 | if (regnum < regcache->descr->nr_raw_registers) | |
778 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 779 | else |
68365089 | 780 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 781 | regnum, buf); |
61a0eb5b AC |
782 | } |
783 | ||
32178cab MS |
784 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
785 | into registers starting with the MYREGSTART'th byte of register data. */ | |
786 | ||
787 | void | |
73937e03 | 788 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
32178cab MS |
789 | { |
790 | int myregend = myregstart + inlen; | |
5ebd2499 | 791 | int regnum; |
32178cab MS |
792 | |
793 | target_prepare_to_store (); | |
794 | ||
795 | /* Scan through the registers updating any that are covered by the | |
796 | range myregstart<=>myregend using write_register_gen, which does | |
797 | nice things like handling threads, and avoiding updates when the | |
798 | new and old contents are the same. */ | |
799 | ||
5ebd2499 | 800 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab MS |
801 | { |
802 | int regstart, regend; | |
803 | ||
62700349 | 804 | regstart = DEPRECATED_REGISTER_BYTE (regnum); |
3acba339 | 805 | regend = regstart + register_size (current_gdbarch, regnum); |
32178cab MS |
806 | |
807 | /* Is this register completely outside the range the user is writing? */ | |
808 | if (myregend <= regstart || regend <= myregstart) | |
809 | /* do nothing */ ; | |
810 | ||
811 | /* Is this register completely within the range the user is writing? */ | |
812 | else if (myregstart <= regstart && regend <= myregend) | |
4caf0990 | 813 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
32178cab MS |
814 | |
815 | /* The register partially overlaps the range being written. */ | |
816 | else | |
817 | { | |
d9d9c31f | 818 | char regbuf[MAX_REGISTER_SIZE]; |
32178cab MS |
819 | /* What's the overlap between this register's bytes and |
820 | those the caller wants to write? */ | |
821 | int overlapstart = max (regstart, myregstart); | |
822 | int overlapend = min (regend, myregend); | |
823 | ||
824 | /* We may be doing a partial update of an invalid register. | |
825 | Update it from the target before scribbling on it. */ | |
4caf0990 | 826 | deprecated_read_register_gen (regnum, regbuf); |
32178cab | 827 | |
5c27f28a | 828 | target_store_registers (regnum); |
32178cab MS |
829 | } |
830 | } | |
831 | } | |
832 | ||
06c0b04e AC |
833 | /* Perform a partial register transfer using a read, modify, write |
834 | operation. */ | |
835 | ||
836 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
837 | void *buf); | |
838 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
839 | const void *buf); | |
840 | ||
b9362cc7 | 841 | static void |
06c0b04e AC |
842 | regcache_xfer_part (struct regcache *regcache, int regnum, |
843 | int offset, int len, void *in, const void *out, | |
844 | regcache_read_ftype *read, regcache_write_ftype *write) | |
845 | { | |
846 | struct regcache_descr *descr = regcache->descr; | |
123a958e | 847 | bfd_byte reg[MAX_REGISTER_SIZE]; |
06c0b04e AC |
848 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
849 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
850 | /* Something to do? */ | |
851 | if (offset + len == 0) | |
852 | return; | |
853 | /* Read (when needed) ... */ | |
854 | if (in != NULL | |
855 | || offset > 0 | |
856 | || offset + len < descr->sizeof_register[regnum]) | |
857 | { | |
858 | gdb_assert (read != NULL); | |
859 | read (regcache, regnum, reg); | |
860 | } | |
861 | /* ... modify ... */ | |
862 | if (in != NULL) | |
863 | memcpy (in, reg + offset, len); | |
864 | if (out != NULL) | |
865 | memcpy (reg + offset, out, len); | |
866 | /* ... write (when needed). */ | |
867 | if (out != NULL) | |
868 | { | |
869 | gdb_assert (write != NULL); | |
870 | write (regcache, regnum, reg); | |
871 | } | |
872 | } | |
873 | ||
874 | void | |
875 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
876 | int offset, int len, void *buf) | |
877 | { | |
878 | struct regcache_descr *descr = regcache->descr; | |
879 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
880 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
881 | regcache_raw_read, regcache_raw_write); | |
882 | } | |
883 | ||
884 | void | |
885 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
886 | int offset, int len, const void *buf) | |
887 | { | |
888 | struct regcache_descr *descr = regcache->descr; | |
889 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
890 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
891 | regcache_raw_read, regcache_raw_write); | |
892 | } | |
893 | ||
894 | void | |
895 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
896 | int offset, int len, void *buf) | |
897 | { | |
898 | struct regcache_descr *descr = regcache->descr; | |
899 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
900 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
901 | regcache_cooked_read, regcache_cooked_write); | |
902 | } | |
903 | ||
904 | void | |
905 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
906 | int offset, int len, const void *buf) | |
907 | { | |
908 | struct regcache_descr *descr = regcache->descr; | |
909 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
910 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
911 | regcache_cooked_read, regcache_cooked_write); | |
912 | } | |
32178cab | 913 | |
d3b22ed5 AC |
914 | /* Hack to keep code that view the register buffer as raw bytes |
915 | working. */ | |
916 | ||
917 | int | |
918 | register_offset_hack (struct gdbarch *gdbarch, int regnum) | |
919 | { | |
920 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
921 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
922 | return descr->register_offset[regnum]; | |
923 | } | |
924 | ||
f42accbe AC |
925 | /* Hack to keep code using register_bytes working. */ |
926 | ||
927 | int | |
928 | deprecated_register_bytes (void) | |
929 | { | |
930 | return current_regcache->descr->sizeof_raw_registers; | |
931 | } | |
932 | ||
5ebd2499 | 933 | /* Return the contents of register REGNUM as an unsigned integer. */ |
32178cab | 934 | |
173155e8 | 935 | ULONGEST |
5ebd2499 | 936 | read_register (int regnum) |
32178cab | 937 | { |
3acba339 | 938 | char *buf = alloca (register_size (current_gdbarch, regnum)); |
4caf0990 | 939 | deprecated_read_register_gen (regnum, buf); |
3acba339 | 940 | return (extract_unsigned_integer (buf, register_size (current_gdbarch, regnum))); |
32178cab MS |
941 | } |
942 | ||
173155e8 | 943 | ULONGEST |
39f77062 | 944 | read_register_pid (int regnum, ptid_t ptid) |
32178cab | 945 | { |
39f77062 | 946 | ptid_t save_ptid; |
32178cab MS |
947 | int save_pid; |
948 | CORE_ADDR retval; | |
949 | ||
39f77062 | 950 | if (ptid_equal (ptid, inferior_ptid)) |
5ebd2499 | 951 | return read_register (regnum); |
32178cab | 952 | |
39f77062 | 953 | save_ptid = inferior_ptid; |
32178cab | 954 | |
39f77062 | 955 | inferior_ptid = ptid; |
32178cab | 956 | |
5ebd2499 | 957 | retval = read_register (regnum); |
32178cab | 958 | |
39f77062 | 959 | inferior_ptid = save_ptid; |
32178cab MS |
960 | |
961 | return retval; | |
962 | } | |
963 | ||
5ebd2499 | 964 | /* Store VALUE into the raw contents of register number REGNUM. */ |
32178cab MS |
965 | |
966 | void | |
5ebd2499 | 967 | write_register (int regnum, LONGEST val) |
32178cab | 968 | { |
61a0eb5b | 969 | void *buf; |
32178cab | 970 | int size; |
3acba339 | 971 | size = register_size (current_gdbarch, regnum); |
32178cab MS |
972 | buf = alloca (size); |
973 | store_signed_integer (buf, size, (LONGEST) val); | |
4caf0990 | 974 | deprecated_write_register_gen (regnum, buf); |
32178cab MS |
975 | } |
976 | ||
977 | void | |
39f77062 | 978 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
32178cab | 979 | { |
39f77062 | 980 | ptid_t save_ptid; |
32178cab | 981 | |
39f77062 | 982 | if (ptid_equal (ptid, inferior_ptid)) |
32178cab | 983 | { |
5ebd2499 | 984 | write_register (regnum, val); |
32178cab MS |
985 | return; |
986 | } | |
987 | ||
39f77062 | 988 | save_ptid = inferior_ptid; |
32178cab | 989 | |
39f77062 | 990 | inferior_ptid = ptid; |
32178cab | 991 | |
5ebd2499 | 992 | write_register (regnum, val); |
32178cab | 993 | |
39f77062 | 994 | inferior_ptid = save_ptid; |
32178cab MS |
995 | } |
996 | ||
a16d75cc | 997 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
9a661b68 MK |
998 | |
999 | void | |
1000 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) | |
1001 | { | |
1002 | void *regbuf; | |
1003 | size_t size; | |
1004 | ||
a16d75cc | 1005 | gdb_assert (regcache != NULL); |
9a661b68 MK |
1006 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
1007 | gdb_assert (!regcache->readonly_p); | |
1008 | ||
1009 | /* FIXME: kettenis/20030828: It shouldn't be necessary to handle | |
1010 | CURRENT_REGCACHE specially here. */ | |
1011 | if (regcache == current_regcache | |
1012 | && !ptid_equal (registers_ptid, inferior_ptid)) | |
1013 | { | |
1014 | registers_changed (); | |
1015 | registers_ptid = inferior_ptid; | |
1016 | } | |
1017 | ||
1018 | regbuf = register_buffer (regcache, regnum); | |
1019 | size = regcache->descr->sizeof_register[regnum]; | |
1020 | ||
1021 | if (buf) | |
1022 | memcpy (regbuf, buf, size); | |
1023 | else | |
1024 | memset (regbuf, 0, size); | |
1025 | ||
1026 | /* Mark the register as cached. */ | |
1027 | regcache->register_valid_p[regnum] = 1; | |
1028 | } | |
1029 | ||
1030 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ | |
1031 | ||
1032 | void | |
1033 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) | |
1034 | { | |
1035 | const void *regbuf; | |
1036 | size_t size; | |
1037 | ||
1038 | gdb_assert (regcache != NULL && buf != NULL); | |
1039 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
1040 | ||
1041 | regbuf = register_buffer (regcache, regnum); | |
1042 | size = regcache->descr->sizeof_register[regnum]; | |
1043 | memcpy (buf, regbuf, size); | |
1044 | } | |
1045 | ||
193cb69f | 1046 | |
9c8dbfa9 AC |
1047 | /* read_pc, write_pc, read_sp, etc. Special handling for registers |
1048 | PC, SP, and FP. */ | |
32178cab | 1049 | |
9c8dbfa9 AC |
1050 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc() and |
1051 | read_sp(), will eventually be replaced by per-frame methods. | |
1052 | Instead of relying on the global INFERIOR_PTID, they will use the | |
1053 | contextual information provided by the FRAME. These functions do | |
1054 | not belong in the register cache. */ | |
32178cab | 1055 | |
cde9ea48 | 1056 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
9c8dbfa9 AC |
1057 | write_pc_pid() and write_pc(), all need to be replaced by something |
1058 | that does not rely on global state. But what? */ | |
32178cab MS |
1059 | |
1060 | CORE_ADDR | |
39f77062 | 1061 | read_pc_pid (ptid_t ptid) |
32178cab | 1062 | { |
39f77062 | 1063 | ptid_t saved_inferior_ptid; |
32178cab MS |
1064 | CORE_ADDR pc_val; |
1065 | ||
39f77062 KB |
1066 | /* In case ptid != inferior_ptid. */ |
1067 | saved_inferior_ptid = inferior_ptid; | |
1068 | inferior_ptid = ptid; | |
32178cab | 1069 | |
cde9ea48 AC |
1070 | if (TARGET_READ_PC_P ()) |
1071 | pc_val = TARGET_READ_PC (ptid); | |
1072 | /* Else use per-frame method on get_current_frame. */ | |
1073 | else if (PC_REGNUM >= 0) | |
1074 | { | |
1075 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); | |
6ba34a8d | 1076 | pc_val = ADDR_BITS_REMOVE (raw_val); |
cde9ea48 AC |
1077 | } |
1078 | else | |
e2e0b3e5 | 1079 | internal_error (__FILE__, __LINE__, _("read_pc_pid: Unable to find PC")); |
32178cab | 1080 | |
39f77062 | 1081 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1082 | return pc_val; |
1083 | } | |
1084 | ||
1085 | CORE_ADDR | |
1086 | read_pc (void) | |
1087 | { | |
39f77062 | 1088 | return read_pc_pid (inferior_ptid); |
32178cab MS |
1089 | } |
1090 | ||
32178cab | 1091 | void |
39f77062 | 1092 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1093 | { |
32178cab | 1094 | if (PC_REGNUM >= 0) |
39f77062 | 1095 | write_register_pid (PC_REGNUM, pc, ptid); |
afb18d0f AC |
1096 | else |
1097 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 1098 | _("generic_target_write_pc")); |
32178cab MS |
1099 | } |
1100 | ||
1101 | void | |
39f77062 | 1102 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1103 | { |
39f77062 | 1104 | ptid_t saved_inferior_ptid; |
32178cab | 1105 | |
39f77062 KB |
1106 | /* In case ptid != inferior_ptid. */ |
1107 | saved_inferior_ptid = inferior_ptid; | |
1108 | inferior_ptid = ptid; | |
32178cab | 1109 | |
39f77062 | 1110 | TARGET_WRITE_PC (pc, ptid); |
32178cab | 1111 | |
39f77062 | 1112 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1113 | } |
1114 | ||
1115 | void | |
1116 | write_pc (CORE_ADDR pc) | |
1117 | { | |
39f77062 | 1118 | write_pc_pid (pc, inferior_ptid); |
32178cab MS |
1119 | } |
1120 | ||
1121 | /* Cope with strage ways of getting to the stack and frame pointers */ | |
1122 | ||
32178cab MS |
1123 | CORE_ADDR |
1124 | read_sp (void) | |
1125 | { | |
bd1ce8ba AC |
1126 | if (TARGET_READ_SP_P ()) |
1127 | return TARGET_READ_SP (); | |
a9e5fdc2 AC |
1128 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
1129 | return get_frame_sp (get_current_frame ()); | |
bd1ce8ba | 1130 | else if (SP_REGNUM >= 0) |
a9e5fdc2 AC |
1131 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
1132 | about the architecture so put it at the end. */ | |
bd1ce8ba | 1133 | return read_register (SP_REGNUM); |
e2e0b3e5 | 1134 | internal_error (__FILE__, __LINE__, _("read_sp: Unable to find SP")); |
32178cab MS |
1135 | } |
1136 | ||
705152c5 MS |
1137 | static void |
1138 | reg_flush_command (char *command, int from_tty) | |
1139 | { | |
1140 | /* Force-flush the register cache. */ | |
1141 | registers_changed (); | |
1142 | if (from_tty) | |
a3f17187 | 1143 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1144 | } |
1145 | ||
32178cab MS |
1146 | static void |
1147 | build_regcache (void) | |
3fadccb3 AC |
1148 | { |
1149 | current_regcache = regcache_xmalloc (current_gdbarch); | |
2d28509a | 1150 | current_regcache->readonly_p = 0; |
3fadccb3 AC |
1151 | } |
1152 | ||
af030b9a AC |
1153 | static void |
1154 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
1155 | const unsigned char *buf, long len) | |
1156 | { | |
1157 | int i; | |
1158 | switch (endian) | |
1159 | { | |
1160 | case BFD_ENDIAN_BIG: | |
1161 | for (i = 0; i < len; i++) | |
1162 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1163 | break; | |
1164 | case BFD_ENDIAN_LITTLE: | |
1165 | for (i = len - 1; i >= 0; i--) | |
1166 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1167 | break; | |
1168 | default: | |
e2e0b3e5 | 1169 | internal_error (__FILE__, __LINE__, _("Bad switch")); |
af030b9a AC |
1170 | } |
1171 | } | |
1172 | ||
1173 | enum regcache_dump_what | |
1174 | { | |
b59ff9d5 | 1175 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
af030b9a AC |
1176 | }; |
1177 | ||
1178 | static void | |
1179 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1180 | enum regcache_dump_what what_to_dump) | |
1181 | { | |
1182 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 | 1183 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
af030b9a AC |
1184 | int regnum; |
1185 | int footnote_nr = 0; | |
1186 | int footnote_register_size = 0; | |
1187 | int footnote_register_offset = 0; | |
1188 | int footnote_register_type_name_null = 0; | |
1189 | long register_offset = 0; | |
123a958e | 1190 | unsigned char buf[MAX_REGISTER_SIZE]; |
af030b9a AC |
1191 | |
1192 | #if 0 | |
af030b9a AC |
1193 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
1194 | regcache->descr->nr_raw_registers); | |
1195 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1196 | regcache->descr->nr_cooked_registers); | |
1197 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1198 | regcache->descr->sizeof_raw_registers); | |
1199 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1200 | regcache->descr->sizeof_raw_register_valid_p); | |
af030b9a AC |
1201 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
1202 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); | |
1203 | #endif | |
1204 | ||
1205 | gdb_assert (regcache->descr->nr_cooked_registers | |
1206 | == (NUM_REGS + NUM_PSEUDO_REGS)); | |
1207 | ||
1208 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1209 | { | |
1210 | /* Name. */ | |
1211 | if (regnum < 0) | |
1212 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1213 | else | |
1214 | { | |
1215 | const char *p = REGISTER_NAME (regnum); | |
1216 | if (p == NULL) | |
1217 | p = ""; | |
1218 | else if (p[0] == '\0') | |
1219 | p = "''"; | |
1220 | fprintf_unfiltered (file, " %-10s", p); | |
1221 | } | |
1222 | ||
1223 | /* Number. */ | |
1224 | if (regnum < 0) | |
1225 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1226 | else | |
1227 | fprintf_unfiltered (file, " %4d", regnum); | |
1228 | ||
1229 | /* Relative number. */ | |
1230 | if (regnum < 0) | |
1231 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1232 | else if (regnum < NUM_REGS) | |
1233 | fprintf_unfiltered (file, " %4d", regnum); | |
1234 | else | |
1235 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); | |
1236 | ||
1237 | /* Offset. */ | |
1238 | if (regnum < 0) | |
1239 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1240 | else | |
1241 | { | |
1242 | fprintf_unfiltered (file, " %6ld", | |
1243 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1244 | if (register_offset != regcache->descr->register_offset[regnum] |
62700349 | 1245 | || register_offset != DEPRECATED_REGISTER_BYTE (regnum) |
d3b22ed5 AC |
1246 | || (regnum > 0 |
1247 | && (regcache->descr->register_offset[regnum] | |
1248 | != (regcache->descr->register_offset[regnum - 1] | |
1249 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1250 | ) | |
af030b9a AC |
1251 | { |
1252 | if (!footnote_register_offset) | |
1253 | footnote_register_offset = ++footnote_nr; | |
1254 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1255 | } | |
1256 | else | |
1257 | fprintf_unfiltered (file, " "); | |
1258 | register_offset = (regcache->descr->register_offset[regnum] | |
1259 | + regcache->descr->sizeof_register[regnum]); | |
1260 | } | |
1261 | ||
1262 | /* Size. */ | |
1263 | if (regnum < 0) | |
1264 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1265 | else | |
01e1877c AC |
1266 | fprintf_unfiltered (file, " %5ld", |
1267 | regcache->descr->sizeof_register[regnum]); | |
af030b9a AC |
1268 | |
1269 | /* Type. */ | |
b59ff9d5 AC |
1270 | { |
1271 | const char *t; | |
1272 | if (regnum < 0) | |
1273 | t = "Type"; | |
1274 | else | |
1275 | { | |
1276 | static const char blt[] = "builtin_type"; | |
1277 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); | |
1278 | if (t == NULL) | |
1279 | { | |
1280 | char *n; | |
1281 | if (!footnote_register_type_name_null) | |
1282 | footnote_register_type_name_null = ++footnote_nr; | |
b435e160 | 1283 | n = xstrprintf ("*%d", footnote_register_type_name_null); |
b59ff9d5 AC |
1284 | make_cleanup (xfree, n); |
1285 | t = n; | |
1286 | } | |
1287 | /* Chop a leading builtin_type. */ | |
1288 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1289 | t += strlen (blt); | |
1290 | } | |
1291 | fprintf_unfiltered (file, " %-15s", t); | |
1292 | } | |
1293 | ||
1294 | /* Leading space always present. */ | |
1295 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1296 | |
1297 | /* Value, raw. */ | |
1298 | if (what_to_dump == regcache_dump_raw) | |
1299 | { | |
1300 | if (regnum < 0) | |
1301 | fprintf_unfiltered (file, "Raw value"); | |
1302 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1303 | fprintf_unfiltered (file, "<cooked>"); | |
1304 | else if (!regcache_valid_p (regcache, regnum)) | |
1305 | fprintf_unfiltered (file, "<invalid>"); | |
1306 | else | |
1307 | { | |
1308 | regcache_raw_read (regcache, regnum, buf); | |
1309 | fprintf_unfiltered (file, "0x"); | |
1310 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
01e1877c | 1311 | regcache->descr->sizeof_register[regnum]); |
af030b9a AC |
1312 | } |
1313 | } | |
1314 | ||
1315 | /* Value, cooked. */ | |
1316 | if (what_to_dump == regcache_dump_cooked) | |
1317 | { | |
1318 | if (regnum < 0) | |
1319 | fprintf_unfiltered (file, "Cooked value"); | |
1320 | else | |
1321 | { | |
1322 | regcache_cooked_read (regcache, regnum, buf); | |
1323 | fprintf_unfiltered (file, "0x"); | |
1324 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
01e1877c | 1325 | regcache->descr->sizeof_register[regnum]); |
af030b9a AC |
1326 | } |
1327 | } | |
1328 | ||
b59ff9d5 AC |
1329 | /* Group members. */ |
1330 | if (what_to_dump == regcache_dump_groups) | |
1331 | { | |
1332 | if (regnum < 0) | |
1333 | fprintf_unfiltered (file, "Groups"); | |
1334 | else | |
1335 | { | |
b59ff9d5 | 1336 | const char *sep = ""; |
6c7d17ba AC |
1337 | struct reggroup *group; |
1338 | for (group = reggroup_next (gdbarch, NULL); | |
1339 | group != NULL; | |
1340 | group = reggroup_next (gdbarch, group)) | |
b59ff9d5 | 1341 | { |
6c7d17ba | 1342 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
b59ff9d5 | 1343 | { |
6c7d17ba | 1344 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group)); |
b59ff9d5 AC |
1345 | sep = ","; |
1346 | } | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | ||
af030b9a AC |
1351 | fprintf_unfiltered (file, "\n"); |
1352 | } | |
1353 | ||
1354 | if (footnote_register_size) | |
1355 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1356 | footnote_register_size); | |
1357 | if (footnote_register_offset) | |
1358 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1359 | footnote_register_offset); | |
1360 | if (footnote_register_type_name_null) | |
1361 | fprintf_unfiltered (file, | |
1362 | "*%d: Register type's name NULL.\n", | |
1363 | footnote_register_type_name_null); | |
1364 | do_cleanups (cleanups); | |
1365 | } | |
1366 | ||
1367 | static void | |
1368 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1369 | { | |
1370 | if (args == NULL) | |
1371 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); | |
1372 | else | |
1373 | { | |
1374 | struct ui_file *file = gdb_fopen (args, "w"); | |
1375 | if (file == NULL) | |
e2e0b3e5 | 1376 | perror_with_name (_("maintenance print architecture")); |
af030b9a AC |
1377 | regcache_dump (current_regcache, file, what_to_dump); |
1378 | ui_file_delete (file); | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | static void | |
1383 | maintenance_print_registers (char *args, int from_tty) | |
1384 | { | |
1385 | regcache_print (args, regcache_dump_none); | |
1386 | } | |
1387 | ||
1388 | static void | |
1389 | maintenance_print_raw_registers (char *args, int from_tty) | |
1390 | { | |
1391 | regcache_print (args, regcache_dump_raw); | |
1392 | } | |
1393 | ||
1394 | static void | |
1395 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1396 | { | |
1397 | regcache_print (args, regcache_dump_cooked); | |
1398 | } | |
1399 | ||
b59ff9d5 AC |
1400 | static void |
1401 | maintenance_print_register_groups (char *args, int from_tty) | |
1402 | { | |
1403 | regcache_print (args, regcache_dump_groups); | |
1404 | } | |
1405 | ||
b9362cc7 AC |
1406 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
1407 | ||
32178cab MS |
1408 | void |
1409 | _initialize_regcache (void) | |
1410 | { | |
030f20e1 | 1411 | regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr); |
046a4708 | 1412 | DEPRECATED_REGISTER_GDBARCH_SWAP (current_regcache); |
046a4708 | 1413 | deprecated_register_gdbarch_swap (NULL, 0, build_regcache); |
705152c5 | 1414 | |
f4c5303c OF |
1415 | observer_attach_target_changed (regcache_observer_target_changed); |
1416 | ||
705152c5 MS |
1417 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1418 | "Force gdb to flush its register cache (maintainer command)"); | |
39f77062 KB |
1419 | |
1420 | /* Initialize the thread/process associated with the current set of | |
1421 | registers. For now, -1 is special, and means `no current process'. */ | |
1422 | registers_ptid = pid_to_ptid (-1); | |
af030b9a AC |
1423 | |
1424 | add_cmd ("registers", class_maintenance, | |
1425 | maintenance_print_registers, | |
1426 | "Print the internal register configuration.\ | |
1427 | Takes an optional file parameter.", | |
1428 | &maintenanceprintlist); | |
1429 | add_cmd ("raw-registers", class_maintenance, | |
1430 | maintenance_print_raw_registers, | |
1431 | "Print the internal register configuration including raw values.\ | |
1432 | Takes an optional file parameter.", | |
1433 | &maintenanceprintlist); | |
1434 | add_cmd ("cooked-registers", class_maintenance, | |
1435 | maintenance_print_cooked_registers, | |
1436 | "Print the internal register configuration including cooked values.\ | |
b59ff9d5 AC |
1437 | Takes an optional file parameter.", |
1438 | &maintenanceprintlist); | |
1439 | add_cmd ("register-groups", class_maintenance, | |
1440 | maintenance_print_register_groups, | |
1441 | "Print the internal register configuration including each register's group.\ | |
af030b9a AC |
1442 | Takes an optional file parameter.", |
1443 | &maintenanceprintlist); | |
1444 | ||
32178cab | 1445 | } |