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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, | |
4 | 2001, 2002 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. */ |
32178cab MS |
33 | |
34 | /* | |
35 | * DATA STRUCTURE | |
36 | * | |
37 | * Here is the actual register cache. | |
38 | */ | |
39 | ||
3fadccb3 AC |
40 | /* Per-architecture object describing the layout of a register cache. |
41 | Computed once when the architecture is created */ | |
42 | ||
43 | struct gdbarch_data *regcache_descr_handle; | |
44 | ||
45 | struct regcache_descr | |
46 | { | |
47 | /* The architecture this descriptor belongs to. */ | |
48 | struct gdbarch *gdbarch; | |
49 | ||
50 | /* Is this a ``legacy'' register cache? Such caches reserve space | |
51 | for raw and pseudo registers and allow access to both. */ | |
52 | int legacy_p; | |
53 | ||
54 | /* The raw register cache. This should contain just [0 | |
55 | .. NUM_RAW_REGISTERS). However, for older targets, it contains | |
56 | space for the full [0 .. NUM_RAW_REGISTERS + | |
57 | NUM_PSEUDO_REGISTERS). */ | |
58 | int nr_raw_registers; | |
59 | long sizeof_raw_registers; | |
60 | long sizeof_raw_register_valid_p; | |
61 | ||
d138e37a AC |
62 | /* The cooked register space. Each cooked register in the range |
63 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
64 | register. The remaining [NR_RAW_REGISTERS | |
65 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo regiters) are mapped onto | |
66 | both raw registers and memory by the architecture methods | |
67 | gdbarch_register_read and gdbarch_register_write. */ | |
68 | int nr_cooked_registers; | |
067df2e5 AC |
69 | long sizeof_cooked_registers; |
70 | long sizeof_cooked_register_valid_p; | |
d138e37a AC |
71 | |
72 | /* Offset and size (in 8 bit bytes), of reach register in the | |
73 | register cache. All registers (including those in the range | |
74 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. | |
75 | Assigning all registers an offset makes it possible to keep | |
76 | legacy code, such as that found in read_register_bytes() and | |
77 | write_register_bytes() working. */ | |
3fadccb3 | 78 | long *register_offset; |
3fadccb3 | 79 | long *sizeof_register; |
3fadccb3 | 80 | |
bb425013 AC |
81 | /* Cached table containing the type of each register. */ |
82 | struct type **register_type; | |
3fadccb3 AC |
83 | }; |
84 | ||
bb425013 AC |
85 | void |
86 | init_legacy_regcache_descr (struct gdbarch *gdbarch, | |
87 | struct regcache_descr *descr) | |
3fadccb3 AC |
88 | { |
89 | int i; | |
3fadccb3 AC |
90 | /* FIXME: cagney/2002-05-11: gdbarch_data() should take that |
91 | ``gdbarch'' as a parameter. */ | |
92 | gdb_assert (gdbarch != NULL); | |
93 | ||
3fadccb3 | 94 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
067df2e5 AC |
95 | in the register cache. Unfortunatly some architectures still |
96 | rely on this and the pseudo_register_write() method. */ | |
d138e37a | 97 | descr->nr_raw_registers = descr->nr_cooked_registers; |
067df2e5 AC |
98 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
99 | ||
100 | /* Compute the offset of each register. Legacy architectures define | |
101 | REGISTER_BYTE() so use that. */ | |
102 | /* FIXME: cagney/2002-11-07: Instead of using REGISTER_BYTE() this | |
103 | code should, as is done in init_regcache_descr(), compute the | |
104 | offets at runtime. This currently isn't possible as some ISAs | |
105 | define overlapping register regions - see the mess in | |
106 | read_register_bytes() and write_register_bytes() registers. */ | |
d138e37a AC |
107 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
108 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
d138e37a | 109 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 110 | { |
067df2e5 AC |
111 | /* FIXME: cagney/2001-12-04: This code shouldn't need to use |
112 | REGISTER_BYTE(). Unfortunatly, legacy code likes to lay the | |
113 | buffer out so that certain registers just happen to overlap. | |
114 | Ulgh! New targets use gdbarch's register read/write and | |
115 | entirely avoid this uglyness. */ | |
3fadccb3 AC |
116 | descr->register_offset[i] = REGISTER_BYTE (i); |
117 | descr->sizeof_register[i] = REGISTER_RAW_SIZE (i); | |
123a958e AC |
118 | gdb_assert (MAX_REGISTER_SIZE >= REGISTER_RAW_SIZE (i)); |
119 | gdb_assert (MAX_REGISTER_SIZE >= REGISTER_VIRTUAL_SIZE (i)); | |
3fadccb3 AC |
120 | } |
121 | ||
067df2e5 AC |
122 | /* Compute the real size of the register buffer. Start out by |
123 | trusting REGISTER_BYTES, but then adjust it upwards should that | |
124 | be found to not be sufficient. */ | |
125 | /* FIXME: cagney/2002-11-05: Instead of using REGISTER_BYTES, this | |
126 | code should, as is done in init_regcache_descr(), compute the | |
127 | total number of register bytes using the accumulated offsets. */ | |
128 | descr->sizeof_cooked_registers = REGISTER_BYTES; /* OK use. */ | |
d138e37a | 129 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 AC |
130 | { |
131 | long regend; | |
132 | /* Keep extending the buffer so that there is always enough | |
133 | space for all registers. The comparison is necessary since | |
134 | legacy code is free to put registers in random places in the | |
135 | buffer separated by holes. Once REGISTER_BYTE() is killed | |
136 | this can be greatly simplified. */ | |
3fadccb3 | 137 | regend = descr->register_offset[i] + descr->sizeof_register[i]; |
067df2e5 AC |
138 | if (descr->sizeof_cooked_registers < regend) |
139 | descr->sizeof_cooked_registers = regend; | |
3fadccb3 | 140 | } |
067df2e5 AC |
141 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
142 | in the register cache. Unfortunatly some architectures still | |
143 | rely on this and the pseudo_register_write() method. */ | |
144 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
3fadccb3 AC |
145 | } |
146 | ||
147 | static void * | |
148 | init_regcache_descr (struct gdbarch *gdbarch) | |
149 | { | |
150 | int i; | |
151 | struct regcache_descr *descr; | |
152 | gdb_assert (gdbarch != NULL); | |
153 | ||
bb425013 AC |
154 | /* Create an initial, zero filled, table. */ |
155 | descr = XCALLOC (1, struct regcache_descr); | |
3fadccb3 | 156 | descr->gdbarch = gdbarch; |
3fadccb3 | 157 | |
d138e37a AC |
158 | /* Total size of the register space. The raw registers are mapped |
159 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 160 | either mapped onto raw-registers or memory. */ |
d138e37a | 161 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
067df2e5 | 162 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
3fadccb3 | 163 | |
bb425013 AC |
164 | /* Fill in a table of register types. */ |
165 | descr->register_type = XCALLOC (descr->nr_cooked_registers, | |
166 | struct type *); | |
167 | for (i = 0; i < descr->nr_cooked_registers; i++) | |
168 | { | |
35cac7cf AC |
169 | if (gdbarch_register_type_p (gdbarch)) |
170 | { | |
171 | gdb_assert (!REGISTER_VIRTUAL_TYPE_P ()); /* OK */ | |
172 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); | |
173 | } | |
174 | else | |
175 | descr->register_type[i] = REGISTER_VIRTUAL_TYPE (i); /* OK */ | |
bb425013 AC |
176 | } |
177 | ||
178 | /* If an old style architecture, fill in the remainder of the | |
179 | register cache descriptor using the register macros. */ | |
180 | if (!gdbarch_pseudo_register_read_p (gdbarch) | |
35cac7cf AC |
181 | && !gdbarch_pseudo_register_write_p (gdbarch) |
182 | && !gdbarch_register_type_p (gdbarch)) | |
bb425013 | 183 | { |
46654a5b AC |
184 | /* NOTE: cagney/2003-05-02: Don't add a test for REGISTER_BYTE_P |
185 | to the above. Doing that would cause all the existing | |
186 | architectures to revert back to the legacy regcache | |
187 | mechanisms, and that is not a good thing. Instead just, | |
188 | later, check that the register cache's layout is consistent | |
189 | with REGISTER_BYTE. */ | |
bb425013 AC |
190 | descr->legacy_p = 1; |
191 | init_legacy_regcache_descr (gdbarch, descr); | |
192 | return descr; | |
193 | } | |
194 | ||
3fadccb3 AC |
195 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
196 | into the register cache. */ | |
197 | descr->nr_raw_registers = NUM_REGS; | |
53826de9 AC |
198 | |
199 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p | |
200 | array. This pretects GDB from erant code that accesses elements | |
201 | of the global register_valid_p[] array in the range [NUM_REGS | |
202 | .. NUM_REGS + NUM_PSEUDO_REGS). */ | |
067df2e5 | 203 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
3fadccb3 | 204 | |
067df2e5 | 205 | /* Lay out the register cache. |
3fadccb3 | 206 | |
bb425013 AC |
207 | NOTE: cagney/2002-05-22: Only register_type() is used when |
208 | constructing the register cache. It is assumed that the | |
209 | register's raw size, virtual size and type length are all the | |
210 | same. */ | |
3fadccb3 AC |
211 | |
212 | { | |
213 | long offset = 0; | |
d138e37a AC |
214 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
215 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
d138e37a | 216 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 217 | { |
bb425013 | 218 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
219 | descr->register_offset[i] = offset; |
220 | offset += descr->sizeof_register[i]; | |
123a958e | 221 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
3fadccb3 AC |
222 | } |
223 | /* Set the real size of the register cache buffer. */ | |
067df2e5 | 224 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
225 | } |
226 | ||
067df2e5 AC |
227 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
228 | the raw registers. Unfortunatly some code still accesses the | |
229 | register array directly using the global registers[]. Until that | |
230 | code has been purged, play safe and over allocating the register | |
231 | buffer. Ulgh! */ | |
232 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
233 | ||
46654a5b AC |
234 | /* Sanity check. Confirm that there is agreement between the |
235 | regcache and the target's redundant REGISTER_BYTE (new targets | |
236 | should not even be defining it). */ | |
d138e37a | 237 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 238 | { |
46654a5b AC |
239 | if (REGISTER_BYTE_P ()) |
240 | gdb_assert (descr->register_offset[i] == REGISTER_BYTE (i)); | |
241 | #if 0 | |
3fadccb3 AC |
242 | gdb_assert (descr->sizeof_register[i] == REGISTER_RAW_SIZE (i)); |
243 | gdb_assert (descr->sizeof_register[i] == REGISTER_VIRTUAL_SIZE (i)); | |
46654a5b | 244 | #endif |
3fadccb3 AC |
245 | } |
246 | /* gdb_assert (descr->sizeof_raw_registers == REGISTER_BYTES (i)); */ | |
3fadccb3 AC |
247 | |
248 | return descr; | |
249 | } | |
250 | ||
251 | static struct regcache_descr * | |
252 | regcache_descr (struct gdbarch *gdbarch) | |
253 | { | |
254 | return gdbarch_data (gdbarch, regcache_descr_handle); | |
255 | } | |
256 | ||
257 | static void | |
258 | xfree_regcache_descr (struct gdbarch *gdbarch, void *ptr) | |
259 | { | |
260 | struct regcache_descr *descr = ptr; | |
261 | if (descr == NULL) | |
262 | return; | |
263 | xfree (descr->register_offset); | |
264 | xfree (descr->sizeof_register); | |
265 | descr->register_offset = NULL; | |
266 | descr->sizeof_register = NULL; | |
267 | xfree (descr); | |
268 | } | |
269 | ||
bb425013 AC |
270 | /* Utility functions returning useful register attributes stored in |
271 | the regcache descr. */ | |
272 | ||
273 | struct type * | |
274 | register_type (struct gdbarch *gdbarch, int regnum) | |
275 | { | |
276 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
277 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
278 | return descr->register_type[regnum]; | |
279 | } | |
280 | ||
0ed04cce AC |
281 | /* Utility functions returning useful register attributes stored in |
282 | the regcache descr. */ | |
283 | ||
08a617da AC |
284 | int |
285 | register_size (struct gdbarch *gdbarch, int regnum) | |
286 | { | |
287 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
288 | int size; | |
289 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); | |
290 | size = descr->sizeof_register[regnum]; | |
291 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ | |
292 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ | |
293 | return size; | |
294 | } | |
295 | ||
3fadccb3 AC |
296 | /* The register cache for storing raw register values. */ |
297 | ||
298 | struct regcache | |
299 | { | |
300 | struct regcache_descr *descr; | |
51b1fe4e AC |
301 | /* The register buffers. A read-only register cache can hold the |
302 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write | |
303 | register cache can only hold [0 .. NUM_REGS). */ | |
304 | char *registers; | |
305 | char *register_valid_p; | |
2d28509a AC |
306 | /* Is this a read-only cache? A read-only cache is used for saving |
307 | the target's register state (e.g, across an inferior function | |
308 | call or just before forcing a function return). A read-only | |
309 | cache can only be updated via the methods regcache_dup() and | |
310 | regcache_cpy(). The actual contents are determined by the | |
311 | reggroup_save and reggroup_restore methods. */ | |
312 | int readonly_p; | |
3fadccb3 AC |
313 | }; |
314 | ||
315 | struct regcache * | |
316 | regcache_xmalloc (struct gdbarch *gdbarch) | |
317 | { | |
318 | struct regcache_descr *descr; | |
319 | struct regcache *regcache; | |
320 | gdb_assert (gdbarch != NULL); | |
321 | descr = regcache_descr (gdbarch); | |
322 | regcache = XMALLOC (struct regcache); | |
323 | regcache->descr = descr; | |
51b1fe4e | 324 | regcache->registers |
3fadccb3 | 325 | = XCALLOC (descr->sizeof_raw_registers, char); |
51b1fe4e | 326 | regcache->register_valid_p |
3fadccb3 | 327 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
2d28509a | 328 | regcache->readonly_p = 1; |
3fadccb3 AC |
329 | return regcache; |
330 | } | |
331 | ||
332 | void | |
333 | regcache_xfree (struct regcache *regcache) | |
334 | { | |
335 | if (regcache == NULL) | |
336 | return; | |
51b1fe4e AC |
337 | xfree (regcache->registers); |
338 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
339 | xfree (regcache); |
340 | } | |
341 | ||
36160dc4 AC |
342 | void |
343 | do_regcache_xfree (void *data) | |
344 | { | |
345 | regcache_xfree (data); | |
346 | } | |
347 | ||
348 | struct cleanup * | |
349 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
350 | { | |
351 | return make_cleanup (do_regcache_xfree, regcache); | |
352 | } | |
353 | ||
51b1fe4e AC |
354 | /* Return a pointer to register REGNUM's buffer cache. */ |
355 | ||
356 | static char * | |
357 | register_buffer (struct regcache *regcache, int regnum) | |
358 | { | |
359 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
360 | } | |
361 | ||
2d28509a | 362 | void |
5602984a AC |
363 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
364 | void *src) | |
2d28509a AC |
365 | { |
366 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 367 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 368 | int regnum; |
2d28509a | 369 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 370 | end up trying to write the register values back out to the |
2d28509a | 371 | target. */ |
2d28509a AC |
372 | gdb_assert (dst->readonly_p); |
373 | /* Clear the dest. */ | |
374 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
375 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); | |
376 | /* Copy over any registers (identified by their membership in the | |
5602984a AC |
377 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
378 | NUM_PSEUDO_REGS) range is checked since some architectures need | |
379 | to save/restore `cooked' registers that live in memory. */ | |
2d28509a AC |
380 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
381 | { | |
382 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
383 | { | |
5602984a AC |
384 | int valid = cooked_read (src, regnum, buf); |
385 | if (valid) | |
386 | { | |
387 | memcpy (register_buffer (dst, regnum), buf, | |
388 | register_size (gdbarch, regnum)); | |
389 | dst->register_valid_p[regnum] = 1; | |
390 | } | |
2d28509a AC |
391 | } |
392 | } | |
393 | } | |
394 | ||
395 | void | |
5602984a AC |
396 | regcache_restore (struct regcache *dst, |
397 | regcache_cooked_read_ftype *cooked_read, | |
398 | void *src) | |
2d28509a AC |
399 | { |
400 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 401 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 402 | int regnum; |
5602984a AC |
403 | /* The dst had better not be read-only. If it is, the `restore' |
404 | doesn't make much sense. */ | |
2d28509a | 405 | gdb_assert (!dst->readonly_p); |
2d28509a | 406 | /* Copy over any registers, being careful to only restore those that |
5602984a AC |
407 | were both saved and need to be restored. The full [0 .. NUM_REGS |
408 | + NUM_PSEUDO_REGS) range is checked since some architectures need | |
409 | to save/restore `cooked' registers that live in memory. */ | |
410 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 411 | { |
5602984a | 412 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 413 | { |
5602984a AC |
414 | int valid = cooked_read (src, regnum, buf); |
415 | if (valid) | |
416 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
417 | } |
418 | } | |
419 | } | |
420 | ||
5602984a AC |
421 | static int |
422 | do_cooked_read (void *src, int regnum, void *buf) | |
423 | { | |
424 | struct regcache *regcache = src; | |
425 | if (!regcache_valid_p (regcache, regnum) | |
426 | && regcache->readonly_p) | |
427 | /* Don't even think about fetching a register from a read-only | |
428 | cache when the register isn't yet valid. There isn't a target | |
429 | from which the register value can be fetched. */ | |
430 | return 0; | |
431 | regcache_cooked_read (regcache, regnum, buf); | |
432 | return 1; | |
433 | } | |
434 | ||
435 | ||
3fadccb3 AC |
436 | void |
437 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
438 | { | |
439 | int i; | |
440 | char *buf; | |
441 | gdb_assert (src != NULL && dst != NULL); | |
442 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
443 | gdb_assert (src != dst); | |
2d28509a AC |
444 | gdb_assert (src->readonly_p || dst->readonly_p); |
445 | if (!src->readonly_p) | |
5602984a | 446 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 447 | else if (!dst->readonly_p) |
5602984a | 448 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
449 | else |
450 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
451 | } |
452 | ||
453 | void | |
454 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
455 | { | |
456 | int i; | |
457 | gdb_assert (src != NULL && dst != NULL); | |
458 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
459 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
460 | move of data into the current_regcache(). Doing this would be | |
461 | silly - it would mean that valid_p would be completly invalid. */ | |
462 | gdb_assert (dst != current_regcache); | |
51b1fe4e AC |
463 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
464 | memcpy (dst->register_valid_p, src->register_valid_p, | |
3fadccb3 AC |
465 | dst->descr->sizeof_raw_register_valid_p); |
466 | } | |
467 | ||
468 | struct regcache * | |
469 | regcache_dup (struct regcache *src) | |
470 | { | |
471 | struct regcache *newbuf; | |
472 | gdb_assert (current_regcache != NULL); | |
473 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
474 | regcache_cpy (newbuf, src); | |
475 | return newbuf; | |
476 | } | |
477 | ||
478 | struct regcache * | |
479 | regcache_dup_no_passthrough (struct regcache *src) | |
480 | { | |
481 | struct regcache *newbuf; | |
482 | gdb_assert (current_regcache != NULL); | |
483 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
484 | regcache_cpy_no_passthrough (newbuf, src); | |
485 | return newbuf; | |
486 | } | |
487 | ||
488 | int | |
489 | regcache_valid_p (struct regcache *regcache, int regnum) | |
490 | { | |
491 | gdb_assert (regcache != NULL); | |
492 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
51b1fe4e | 493 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
494 | } |
495 | ||
3fadccb3 AC |
496 | char * |
497 | deprecated_grub_regcache_for_registers (struct regcache *regcache) | |
498 | { | |
51b1fe4e | 499 | return regcache->registers; |
3fadccb3 AC |
500 | } |
501 | ||
502 | char * | |
503 | deprecated_grub_regcache_for_register_valid (struct regcache *regcache) | |
504 | { | |
51b1fe4e | 505 | return regcache->register_valid_p; |
3fadccb3 AC |
506 | } |
507 | ||
508 | /* Global structure containing the current regcache. */ | |
509 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and | |
8262ee23 | 510 | deprecated_register_valid[] currently point into this structure. */ |
3fadccb3 AC |
511 | struct regcache *current_regcache; |
512 | ||
5ebd2499 | 513 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
514 | recording if the register values have been changed (eg. by the |
515 | user). Therefore all registers must be written back to the | |
516 | target when appropriate. */ | |
517 | ||
518 | /* REGISTERS contains the cached register values (in target byte order). */ | |
519 | ||
524d7c18 | 520 | char *deprecated_registers; |
32178cab | 521 | |
8262ee23 | 522 | /* DEPRECATED_REGISTER_VALID is 0 if the register needs to be fetched, |
32178cab MS |
523 | 1 if it has been fetched, and |
524 | -1 if the register value was not available. | |
c97dcfc7 AC |
525 | |
526 | "Not available" indicates that the target is not not able to supply | |
527 | the register at this state. The register may become available at a | |
528 | later time (after the next resume). This often occures when GDB is | |
529 | manipulating a target that contains only a snapshot of the entire | |
530 | system being debugged - some of the registers in such a system may | |
531 | not have been saved. */ | |
32178cab | 532 | |
8262ee23 | 533 | signed char *deprecated_register_valid; |
32178cab | 534 | |
39f77062 | 535 | /* The thread/process associated with the current set of registers. */ |
32178cab | 536 | |
39f77062 | 537 | static ptid_t registers_ptid; |
32178cab MS |
538 | |
539 | /* | |
540 | * FUNCTIONS: | |
541 | */ | |
542 | ||
543 | /* REGISTER_CACHED() | |
544 | ||
545 | Returns 0 if the value is not in the cache (needs fetch). | |
546 | >0 if the value is in the cache. | |
547 | <0 if the value is permanently unavailable (don't ask again). */ | |
548 | ||
549 | int | |
550 | register_cached (int regnum) | |
551 | { | |
8262ee23 | 552 | return deprecated_register_valid[regnum]; |
32178cab MS |
553 | } |
554 | ||
7302a204 ND |
555 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
556 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ | |
557 | ||
558 | void | |
559 | set_register_cached (int regnum, int state) | |
560 | { | |
53826de9 AC |
561 | gdb_assert (regnum >= 0); |
562 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); | |
51b1fe4e | 563 | current_regcache->register_valid_p[regnum] = state; |
7302a204 ND |
564 | } |
565 | ||
566 | /* Return whether register REGNUM is a real register. */ | |
567 | ||
568 | static int | |
569 | real_register (int regnum) | |
570 | { | |
571 | return regnum >= 0 && regnum < NUM_REGS; | |
572 | } | |
573 | ||
32178cab MS |
574 | /* Low level examining and depositing of registers. |
575 | ||
576 | The caller is responsible for making sure that the inferior is | |
577 | stopped before calling the fetching routines, or it will get | |
578 | garbage. (a change from GDB version 3, in which the caller got the | |
579 | value from the last stop). */ | |
580 | ||
581 | /* REGISTERS_CHANGED () | |
582 | ||
583 | Indicate that registers may have changed, so invalidate the cache. */ | |
584 | ||
585 | void | |
586 | registers_changed (void) | |
587 | { | |
588 | int i; | |
32178cab | 589 | |
39f77062 | 590 | registers_ptid = pid_to_ptid (-1); |
32178cab MS |
591 | |
592 | /* Force cleanup of any alloca areas if using C alloca instead of | |
593 | a builtin alloca. This particular call is used to clean up | |
594 | areas allocated by low level target code which may build up | |
595 | during lengthy interactions between gdb and the target before | |
596 | gdb gives control to the user (ie watchpoints). */ | |
597 | alloca (0); | |
598 | ||
53826de9 | 599 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
7302a204 | 600 | set_register_cached (i, 0); |
32178cab MS |
601 | |
602 | if (registers_changed_hook) | |
603 | registers_changed_hook (); | |
604 | } | |
605 | ||
2b9e5f3f | 606 | /* DEPRECATED_REGISTERS_FETCHED () |
32178cab MS |
607 | |
608 | Indicate that all registers have been fetched, so mark them all valid. */ | |
609 | ||
31e9866e AC |
610 | /* NOTE: cagney/2001-12-04: This function does not set valid on the |
611 | pseudo-register range since pseudo registers are always supplied | |
612 | using supply_register(). */ | |
613 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target | |
614 | code was blatting the registers[] array and then calling this. | |
615 | Since targets should only be using supply_register() the need for | |
616 | this function/hack is eliminated. */ | |
32178cab MS |
617 | |
618 | void | |
2b9e5f3f | 619 | deprecated_registers_fetched (void) |
32178cab MS |
620 | { |
621 | int i; | |
32178cab | 622 | |
a728f042 | 623 | for (i = 0; i < NUM_REGS; i++) |
7302a204 | 624 | set_register_cached (i, 1); |
fcdc5976 | 625 | /* Do not assume that the pseudo-regs have also been fetched. |
31e9866e | 626 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
32178cab MS |
627 | } |
628 | ||
73937e03 AC |
629 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
630 | are generally a *BAD* idea. They are inefficient because they need | |
631 | to check for partial updates, which can only be done by scanning | |
632 | through all of the registers and seeing if the bytes that are being | |
633 | read/written fall inside of an invalid register. [The main reason | |
634 | this is necessary is that register sizes can vary, so a simple | |
635 | index won't suffice.] It is far better to call read_register_gen | |
636 | and write_register_gen if you want to get at the raw register | |
637 | contents, as it only takes a regnum as an argument, and therefore | |
638 | can't do a partial register update. | |
32178cab MS |
639 | |
640 | Prior to the recent fixes to check for partial updates, both read | |
73937e03 AC |
641 | and deprecated_write_register_bytes always checked to see if any |
642 | registers were stale, and then called target_fetch_registers (-1) | |
643 | to update the whole set. This caused really slowed things down for | |
644 | remote targets. */ | |
32178cab MS |
645 | |
646 | /* Copy INLEN bytes of consecutive data from registers | |
647 | starting with the INREGBYTE'th byte of register data | |
648 | into memory at MYADDR. */ | |
649 | ||
650 | void | |
73937e03 | 651 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
32178cab | 652 | { |
61a0eb5b | 653 | int in_end = in_start + in_len; |
5ebd2499 | 654 | int regnum; |
d9d9c31f | 655 | char reg_buf[MAX_REGISTER_SIZE]; |
32178cab MS |
656 | |
657 | /* See if we are trying to read bytes from out-of-date registers. If so, | |
658 | update just those registers. */ | |
659 | ||
5ebd2499 | 660 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab | 661 | { |
61a0eb5b AC |
662 | int reg_start; |
663 | int reg_end; | |
664 | int reg_len; | |
665 | int start; | |
666 | int end; | |
667 | int byte; | |
32178cab | 668 | |
61a0eb5b AC |
669 | reg_start = REGISTER_BYTE (regnum); |
670 | reg_len = REGISTER_RAW_SIZE (regnum); | |
671 | reg_end = reg_start + reg_len; | |
32178cab | 672 | |
61a0eb5b | 673 | if (reg_end <= in_start || in_end <= reg_start) |
5ebd2499 | 674 | /* The range the user wants to read doesn't overlap with regnum. */ |
32178cab MS |
675 | continue; |
676 | ||
275f450c AC |
677 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
678 | /* Force the cache to fetch the entire register. */ | |
4caf0990 | 679 | deprecated_read_register_gen (regnum, reg_buf); |
275f450c AC |
680 | else |
681 | /* Legacy note: even though this register is ``invalid'' we | |
682 | still need to return something. It would appear that some | |
683 | code relies on apparent gaps in the register array also | |
684 | being returned. */ | |
685 | /* FIXME: cagney/2001-08-18: This is just silly. It defeats | |
686 | the entire register read/write flow of control. Must | |
687 | resist temptation to return 0xdeadbeef. */ | |
524d7c18 | 688 | memcpy (reg_buf, &deprecated_registers[reg_start], reg_len); |
32178cab | 689 | |
61a0eb5b AC |
690 | /* Legacy note: This function, for some reason, allows a NULL |
691 | input buffer. If the buffer is NULL, the registers are still | |
692 | fetched, just the final transfer is skipped. */ | |
693 | if (in_buf == NULL) | |
694 | continue; | |
695 | ||
696 | /* start = max (reg_start, in_start) */ | |
697 | if (reg_start > in_start) | |
698 | start = reg_start; | |
699 | else | |
700 | start = in_start; | |
701 | ||
702 | /* end = min (reg_end, in_end) */ | |
703 | if (reg_end < in_end) | |
704 | end = reg_end; | |
705 | else | |
706 | end = in_end; | |
707 | ||
708 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ | |
709 | for (byte = start; byte < end; byte++) | |
165cd47f | 710 | { |
61a0eb5b | 711 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
165cd47f | 712 | } |
32178cab | 713 | } |
32178cab MS |
714 | } |
715 | ||
5ebd2499 ND |
716 | /* Read register REGNUM into memory at MYADDR, which must be large |
717 | enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the | |
32178cab MS |
718 | register is known to be the size of a CORE_ADDR or smaller, |
719 | read_register can be used instead. */ | |
720 | ||
61a0eb5b AC |
721 | static void |
722 | legacy_read_register_gen (int regnum, char *myaddr) | |
32178cab | 723 | { |
61a0eb5b | 724 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
39f77062 | 725 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
726 | { |
727 | registers_changed (); | |
39f77062 | 728 | registers_ptid = inferior_ptid; |
32178cab MS |
729 | } |
730 | ||
7302a204 | 731 | if (!register_cached (regnum)) |
5c27f28a | 732 | target_fetch_registers (regnum); |
7302a204 | 733 | |
3fadccb3 | 734 | memcpy (myaddr, register_buffer (current_regcache, regnum), |
5ebd2499 | 735 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
736 | } |
737 | ||
61a0eb5b | 738 | void |
1aaa5f99 | 739 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
61a0eb5b | 740 | { |
3fadccb3 AC |
741 | gdb_assert (regcache != NULL && buf != NULL); |
742 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
743 | if (regcache->descr->legacy_p | |
2d28509a | 744 | && !regcache->readonly_p) |
3fadccb3 AC |
745 | { |
746 | gdb_assert (regcache == current_regcache); | |
747 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
748 | silently and very indirectly updates the regcache's regcache | |
8262ee23 | 749 | via the global deprecated_register_valid[]. */ |
3fadccb3 AC |
750 | legacy_read_register_gen (regnum, buf); |
751 | return; | |
752 | } | |
753 | /* Make certain that the register cache is up-to-date with respect | |
754 | to the current thread. This switching shouldn't be necessary | |
755 | only there is still only one target side register cache. Sigh! | |
756 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 757 | if (!regcache->readonly_p) |
3fadccb3 AC |
758 | { |
759 | gdb_assert (regcache == current_regcache); | |
760 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
761 | { | |
762 | registers_changed (); | |
763 | registers_ptid = inferior_ptid; | |
764 | } | |
765 | if (!register_cached (regnum)) | |
5c27f28a | 766 | target_fetch_registers (regnum); |
3fadccb3 AC |
767 | } |
768 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 769 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 770 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
771 | } |
772 | ||
28fc6740 AC |
773 | void |
774 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
775 | { | |
776 | char *buf; | |
777 | gdb_assert (regcache != NULL); | |
778 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
779 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
780 | regcache_raw_read (regcache, regnum, buf); | |
781 | (*val) = extract_signed_integer (buf, | |
782 | regcache->descr->sizeof_register[regnum]); | |
783 | } | |
784 | ||
785 | void | |
786 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
787 | ULONGEST *val) | |
788 | { | |
789 | char *buf; | |
790 | gdb_assert (regcache != NULL); | |
791 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
792 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
793 | regcache_raw_read (regcache, regnum, buf); | |
794 | (*val) = extract_unsigned_integer (buf, | |
795 | regcache->descr->sizeof_register[regnum]); | |
796 | } | |
797 | ||
c00dcbe9 MK |
798 | void |
799 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
800 | { | |
801 | void *buf; | |
802 | gdb_assert (regcache != NULL); | |
803 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
804 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
805 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
806 | regcache_raw_write (regcache, regnum, buf); | |
807 | } | |
808 | ||
809 | void | |
810 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
811 | ULONGEST val) | |
812 | { | |
813 | void *buf; | |
814 | gdb_assert (regcache != NULL); | |
815 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
816 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
817 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
818 | regcache_raw_write (regcache, regnum, buf); | |
819 | } | |
820 | ||
61a0eb5b | 821 | void |
4caf0990 | 822 | deprecated_read_register_gen (int regnum, char *buf) |
61a0eb5b | 823 | { |
3fadccb3 AC |
824 | gdb_assert (current_regcache != NULL); |
825 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
826 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
827 | { |
828 | legacy_read_register_gen (regnum, buf); | |
829 | return; | |
830 | } | |
68365089 AC |
831 | regcache_cooked_read (current_regcache, regnum, buf); |
832 | } | |
833 | ||
834 | void | |
29e1842b | 835 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
68365089 | 836 | { |
d138e37a | 837 | gdb_assert (regnum >= 0); |
68365089 AC |
838 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
839 | if (regnum < regcache->descr->nr_raw_registers) | |
840 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
841 | else if (regcache->readonly_p |
842 | && regnum < regcache->descr->nr_cooked_registers | |
843 | && regcache->register_valid_p[regnum]) | |
844 | /* Read-only register cache, perhaphs the cooked value was cached? */ | |
845 | memcpy (buf, register_buffer (regcache, regnum), | |
846 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 847 | else |
68365089 AC |
848 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
849 | regnum, buf); | |
61a0eb5b AC |
850 | } |
851 | ||
a378f419 AC |
852 | void |
853 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
854 | LONGEST *val) | |
855 | { | |
856 | char *buf; | |
857 | gdb_assert (regcache != NULL); | |
a66a9c23 | 858 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
859 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
860 | regcache_cooked_read (regcache, regnum, buf); | |
861 | (*val) = extract_signed_integer (buf, | |
862 | regcache->descr->sizeof_register[regnum]); | |
863 | } | |
864 | ||
865 | void | |
866 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
867 | ULONGEST *val) | |
868 | { | |
869 | char *buf; | |
870 | gdb_assert (regcache != NULL); | |
a66a9c23 | 871 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
872 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
873 | regcache_cooked_read (regcache, regnum, buf); | |
874 | (*val) = extract_unsigned_integer (buf, | |
875 | regcache->descr->sizeof_register[regnum]); | |
876 | } | |
877 | ||
a66a9c23 AC |
878 | void |
879 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
880 | LONGEST val) | |
881 | { | |
882 | void *buf; | |
883 | gdb_assert (regcache != NULL); | |
884 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
885 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
886 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
887 | regcache_cooked_write (regcache, regnum, buf); | |
888 | } | |
889 | ||
890 | void | |
891 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
892 | ULONGEST val) | |
893 | { | |
894 | void *buf; | |
895 | gdb_assert (regcache != NULL); | |
896 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
897 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
898 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
899 | regcache_cooked_write (regcache, regnum, buf); | |
900 | } | |
901 | ||
5ebd2499 ND |
902 | /* Write register REGNUM at MYADDR to the target. MYADDR points at |
903 | REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */ | |
32178cab | 904 | |
61a0eb5b | 905 | static void |
1aaa5f99 | 906 | legacy_write_register_gen (int regnum, const void *myaddr) |
32178cab MS |
907 | { |
908 | int size; | |
61a0eb5b | 909 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
32178cab MS |
910 | |
911 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
912 | change the registers array if something writes to this register. */ | |
5ebd2499 | 913 | if (CANNOT_STORE_REGISTER (regnum)) |
32178cab MS |
914 | return; |
915 | ||
39f77062 | 916 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
917 | { |
918 | registers_changed (); | |
39f77062 | 919 | registers_ptid = inferior_ptid; |
32178cab MS |
920 | } |
921 | ||
5ebd2499 | 922 | size = REGISTER_RAW_SIZE (regnum); |
32178cab | 923 | |
7302a204 | 924 | if (real_register (regnum)) |
1297a2f0 MS |
925 | { |
926 | /* If we have a valid copy of the register, and new value == old | |
927 | value, then don't bother doing the actual store. */ | |
928 | if (register_cached (regnum) | |
3fadccb3 AC |
929 | && (memcmp (register_buffer (current_regcache, regnum), myaddr, size) |
930 | == 0)) | |
1297a2f0 MS |
931 | return; |
932 | else | |
933 | target_prepare_to_store (); | |
934 | } | |
32178cab | 935 | |
3fadccb3 | 936 | memcpy (register_buffer (current_regcache, regnum), myaddr, size); |
32178cab | 937 | |
7302a204 | 938 | set_register_cached (regnum, 1); |
5c27f28a | 939 | target_store_registers (regnum); |
32178cab MS |
940 | } |
941 | ||
61a0eb5b | 942 | void |
1aaa5f99 | 943 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
61a0eb5b | 944 | { |
3fadccb3 AC |
945 | gdb_assert (regcache != NULL && buf != NULL); |
946 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 947 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 948 | |
2d28509a | 949 | if (regcache->descr->legacy_p) |
3fadccb3 AC |
950 | { |
951 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
952 | silently and very indirectly updates the regcache's buffers | |
8262ee23 | 953 | via the globals deprecated_register_valid[] and registers[]. */ |
3fadccb3 AC |
954 | gdb_assert (regcache == current_regcache); |
955 | legacy_write_register_gen (regnum, buf); | |
956 | return; | |
957 | } | |
958 | ||
959 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
960 | change the registers array if something writes to this register. */ | |
961 | if (CANNOT_STORE_REGISTER (regnum)) | |
962 | return; | |
963 | ||
3fadccb3 AC |
964 | /* Make certain that the correct cache is selected. */ |
965 | gdb_assert (regcache == current_regcache); | |
966 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
967 | { | |
968 | registers_changed (); | |
969 | registers_ptid = inferior_ptid; | |
970 | } | |
971 | ||
972 | /* If we have a valid copy of the register, and new value == old | |
973 | value, then don't bother doing the actual store. */ | |
974 | if (regcache_valid_p (regcache, regnum) | |
975 | && (memcmp (register_buffer (regcache, regnum), buf, | |
976 | regcache->descr->sizeof_register[regnum]) == 0)) | |
977 | return; | |
978 | ||
979 | target_prepare_to_store (); | |
980 | memcpy (register_buffer (regcache, regnum), buf, | |
981 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 982 | regcache->register_valid_p[regnum] = 1; |
5c27f28a | 983 | target_store_registers (regnum); |
61a0eb5b AC |
984 | } |
985 | ||
986 | void | |
4caf0990 | 987 | deprecated_write_register_gen (int regnum, char *buf) |
61a0eb5b | 988 | { |
3fadccb3 AC |
989 | gdb_assert (current_regcache != NULL); |
990 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
991 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
992 | { |
993 | legacy_write_register_gen (regnum, buf); | |
994 | return; | |
995 | } | |
68365089 AC |
996 | regcache_cooked_write (current_regcache, regnum, buf); |
997 | } | |
998 | ||
999 | void | |
29e1842b | 1000 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
68365089 | 1001 | { |
d138e37a | 1002 | gdb_assert (regnum >= 0); |
68365089 AC |
1003 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
1004 | if (regnum < regcache->descr->nr_raw_registers) | |
1005 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 1006 | else |
68365089 | 1007 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 1008 | regnum, buf); |
61a0eb5b AC |
1009 | } |
1010 | ||
32178cab MS |
1011 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
1012 | into registers starting with the MYREGSTART'th byte of register data. */ | |
1013 | ||
1014 | void | |
73937e03 | 1015 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
32178cab MS |
1016 | { |
1017 | int myregend = myregstart + inlen; | |
5ebd2499 | 1018 | int regnum; |
32178cab MS |
1019 | |
1020 | target_prepare_to_store (); | |
1021 | ||
1022 | /* Scan through the registers updating any that are covered by the | |
1023 | range myregstart<=>myregend using write_register_gen, which does | |
1024 | nice things like handling threads, and avoiding updates when the | |
1025 | new and old contents are the same. */ | |
1026 | ||
5ebd2499 | 1027 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab MS |
1028 | { |
1029 | int regstart, regend; | |
1030 | ||
5ebd2499 ND |
1031 | regstart = REGISTER_BYTE (regnum); |
1032 | regend = regstart + REGISTER_RAW_SIZE (regnum); | |
32178cab MS |
1033 | |
1034 | /* Is this register completely outside the range the user is writing? */ | |
1035 | if (myregend <= regstart || regend <= myregstart) | |
1036 | /* do nothing */ ; | |
1037 | ||
1038 | /* Is this register completely within the range the user is writing? */ | |
1039 | else if (myregstart <= regstart && regend <= myregend) | |
4caf0990 | 1040 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
32178cab MS |
1041 | |
1042 | /* The register partially overlaps the range being written. */ | |
1043 | else | |
1044 | { | |
d9d9c31f | 1045 | char regbuf[MAX_REGISTER_SIZE]; |
32178cab MS |
1046 | /* What's the overlap between this register's bytes and |
1047 | those the caller wants to write? */ | |
1048 | int overlapstart = max (regstart, myregstart); | |
1049 | int overlapend = min (regend, myregend); | |
1050 | ||
1051 | /* We may be doing a partial update of an invalid register. | |
1052 | Update it from the target before scribbling on it. */ | |
4caf0990 | 1053 | deprecated_read_register_gen (regnum, regbuf); |
32178cab | 1054 | |
524d7c18 | 1055 | memcpy (&deprecated_registers[overlapstart], |
32178cab MS |
1056 | myaddr + (overlapstart - myregstart), |
1057 | overlapend - overlapstart); | |
1058 | ||
5c27f28a | 1059 | target_store_registers (regnum); |
32178cab MS |
1060 | } |
1061 | } | |
1062 | } | |
1063 | ||
06c0b04e AC |
1064 | /* Perform a partial register transfer using a read, modify, write |
1065 | operation. */ | |
1066 | ||
1067 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
1068 | void *buf); | |
1069 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
1070 | const void *buf); | |
1071 | ||
1072 | void | |
1073 | regcache_xfer_part (struct regcache *regcache, int regnum, | |
1074 | int offset, int len, void *in, const void *out, | |
1075 | regcache_read_ftype *read, regcache_write_ftype *write) | |
1076 | { | |
1077 | struct regcache_descr *descr = regcache->descr; | |
123a958e | 1078 | bfd_byte reg[MAX_REGISTER_SIZE]; |
06c0b04e AC |
1079 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
1080 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
1081 | /* Something to do? */ | |
1082 | if (offset + len == 0) | |
1083 | return; | |
1084 | /* Read (when needed) ... */ | |
1085 | if (in != NULL | |
1086 | || offset > 0 | |
1087 | || offset + len < descr->sizeof_register[regnum]) | |
1088 | { | |
1089 | gdb_assert (read != NULL); | |
1090 | read (regcache, regnum, reg); | |
1091 | } | |
1092 | /* ... modify ... */ | |
1093 | if (in != NULL) | |
1094 | memcpy (in, reg + offset, len); | |
1095 | if (out != NULL) | |
1096 | memcpy (reg + offset, out, len); | |
1097 | /* ... write (when needed). */ | |
1098 | if (out != NULL) | |
1099 | { | |
1100 | gdb_assert (write != NULL); | |
1101 | write (regcache, regnum, reg); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | void | |
1106 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
1107 | int offset, int len, void *buf) | |
1108 | { | |
1109 | struct regcache_descr *descr = regcache->descr; | |
1110 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1111 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1112 | regcache_raw_read, regcache_raw_write); | |
1113 | } | |
1114 | ||
1115 | void | |
1116 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
1117 | int offset, int len, const void *buf) | |
1118 | { | |
1119 | struct regcache_descr *descr = regcache->descr; | |
1120 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1121 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1122 | regcache_raw_read, regcache_raw_write); | |
1123 | } | |
1124 | ||
1125 | void | |
1126 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
1127 | int offset, int len, void *buf) | |
1128 | { | |
1129 | struct regcache_descr *descr = regcache->descr; | |
1130 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1131 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1132 | regcache_cooked_read, regcache_cooked_write); | |
1133 | } | |
1134 | ||
1135 | void | |
1136 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
1137 | int offset, int len, const void *buf) | |
1138 | { | |
1139 | struct regcache_descr *descr = regcache->descr; | |
1140 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1141 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1142 | regcache_cooked_read, regcache_cooked_write); | |
1143 | } | |
32178cab | 1144 | |
d3b22ed5 AC |
1145 | /* Hack to keep code that view the register buffer as raw bytes |
1146 | working. */ | |
1147 | ||
1148 | int | |
1149 | register_offset_hack (struct gdbarch *gdbarch, int regnum) | |
1150 | { | |
1151 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
1152 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1153 | return descr->register_offset[regnum]; | |
1154 | } | |
1155 | ||
5ebd2499 | 1156 | /* Return the contents of register REGNUM as an unsigned integer. */ |
32178cab | 1157 | |
173155e8 | 1158 | ULONGEST |
5ebd2499 | 1159 | read_register (int regnum) |
32178cab | 1160 | { |
61a0eb5b | 1161 | char *buf = alloca (REGISTER_RAW_SIZE (regnum)); |
4caf0990 | 1162 | deprecated_read_register_gen (regnum, buf); |
61a0eb5b | 1163 | return (extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum))); |
32178cab MS |
1164 | } |
1165 | ||
173155e8 | 1166 | ULONGEST |
39f77062 | 1167 | read_register_pid (int regnum, ptid_t ptid) |
32178cab | 1168 | { |
39f77062 | 1169 | ptid_t save_ptid; |
32178cab MS |
1170 | int save_pid; |
1171 | CORE_ADDR retval; | |
1172 | ||
39f77062 | 1173 | if (ptid_equal (ptid, inferior_ptid)) |
5ebd2499 | 1174 | return read_register (regnum); |
32178cab | 1175 | |
39f77062 | 1176 | save_ptid = inferior_ptid; |
32178cab | 1177 | |
39f77062 | 1178 | inferior_ptid = ptid; |
32178cab | 1179 | |
5ebd2499 | 1180 | retval = read_register (regnum); |
32178cab | 1181 | |
39f77062 | 1182 | inferior_ptid = save_ptid; |
32178cab MS |
1183 | |
1184 | return retval; | |
1185 | } | |
1186 | ||
5ebd2499 | 1187 | /* Store VALUE into the raw contents of register number REGNUM. */ |
32178cab MS |
1188 | |
1189 | void | |
5ebd2499 | 1190 | write_register (int regnum, LONGEST val) |
32178cab | 1191 | { |
61a0eb5b | 1192 | void *buf; |
32178cab | 1193 | int size; |
5ebd2499 | 1194 | size = REGISTER_RAW_SIZE (regnum); |
32178cab MS |
1195 | buf = alloca (size); |
1196 | store_signed_integer (buf, size, (LONGEST) val); | |
4caf0990 | 1197 | deprecated_write_register_gen (regnum, buf); |
32178cab MS |
1198 | } |
1199 | ||
1200 | void | |
39f77062 | 1201 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
32178cab | 1202 | { |
39f77062 | 1203 | ptid_t save_ptid; |
32178cab | 1204 | |
39f77062 | 1205 | if (ptid_equal (ptid, inferior_ptid)) |
32178cab | 1206 | { |
5ebd2499 | 1207 | write_register (regnum, val); |
32178cab MS |
1208 | return; |
1209 | } | |
1210 | ||
39f77062 | 1211 | save_ptid = inferior_ptid; |
32178cab | 1212 | |
39f77062 | 1213 | inferior_ptid = ptid; |
32178cab | 1214 | |
5ebd2499 | 1215 | write_register (regnum, val); |
32178cab | 1216 | |
39f77062 | 1217 | inferior_ptid = save_ptid; |
32178cab MS |
1218 | } |
1219 | ||
1220 | /* SUPPLY_REGISTER() | |
1221 | ||
5ebd2499 | 1222 | Record that register REGNUM contains VAL. This is used when the |
32178cab MS |
1223 | value is obtained from the inferior or core dump, so there is no |
1224 | need to store the value there. | |
1225 | ||
1226 | If VAL is a NULL pointer, then it's probably an unsupported register. | |
5ebd2499 | 1227 | We just set its value to all zeros. We might want to record this |
32178cab MS |
1228 | fact, and report it to the users of read_register and friends. */ |
1229 | ||
1230 | void | |
1aaa5f99 | 1231 | supply_register (int regnum, const void *val) |
32178cab MS |
1232 | { |
1233 | #if 1 | |
39f77062 | 1234 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
1235 | { |
1236 | registers_changed (); | |
39f77062 | 1237 | registers_ptid = inferior_ptid; |
32178cab MS |
1238 | } |
1239 | #endif | |
1240 | ||
7302a204 | 1241 | set_register_cached (regnum, 1); |
32178cab | 1242 | if (val) |
3fadccb3 | 1243 | memcpy (register_buffer (current_regcache, regnum), val, |
5ebd2499 | 1244 | REGISTER_RAW_SIZE (regnum)); |
32178cab | 1245 | else |
3fadccb3 | 1246 | memset (register_buffer (current_regcache, regnum), '\000', |
5ebd2499 | 1247 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
1248 | |
1249 | /* On some architectures, e.g. HPPA, there are a few stray bits in | |
1250 | some registers, that the rest of the code would like to ignore. */ | |
1251 | ||
61a0eb5b AC |
1252 | /* NOTE: cagney/2001-03-16: The macro CLEAN_UP_REGISTER_VALUE is |
1253 | going to be deprecated. Instead architectures will leave the raw | |
1254 | register value as is and instead clean things up as they pass | |
d8124050 | 1255 | through the method gdbarch_pseudo_register_read() clean up the |
61a0eb5b AC |
1256 | values. */ |
1257 | ||
4ee3352d | 1258 | #ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE |
0b434a00 AC |
1259 | DEPRECATED_CLEAN_UP_REGISTER_VALUE \ |
1260 | (regnum, register_buffer (current_regcache, regnum)); | |
32178cab MS |
1261 | #endif |
1262 | } | |
1263 | ||
193cb69f AC |
1264 | void |
1265 | regcache_collect (int regnum, void *buf) | |
1266 | { | |
3fadccb3 AC |
1267 | memcpy (buf, register_buffer (current_regcache, regnum), |
1268 | REGISTER_RAW_SIZE (regnum)); | |
193cb69f AC |
1269 | } |
1270 | ||
1271 | ||
0ba6dca9 AC |
1272 | /* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special |
1273 | handling for registers PC, SP, and FP. */ | |
32178cab | 1274 | |
4e052eda AC |
1275 | /* NOTE: cagney/2001-02-18: The functions generic_target_read_pc(), |
1276 | read_pc_pid(), read_pc(), generic_target_write_pc(), | |
1277 | write_pc_pid(), write_pc(), generic_target_read_sp(), read_sp(), | |
0ba6dca9 AC |
1278 | generic_target_write_sp(), and deprecated_read_fp(), will |
1279 | eventually be moved out of the reg-cache into either frame.[hc] or | |
1280 | to the multi-arch framework. The are not part of the raw register | |
1281 | cache. */ | |
4e052eda | 1282 | |
32178cab MS |
1283 | /* This routine is getting awfully cluttered with #if's. It's probably |
1284 | time to turn this into READ_PC and define it in the tm.h file. | |
1285 | Ditto for write_pc. | |
1286 | ||
1287 | 1999-06-08: The following were re-written so that it assumes the | |
8e1a459b | 1288 | existence of a TARGET_READ_PC et.al. macro. A default generic |
32178cab MS |
1289 | version of that macro is made available where needed. |
1290 | ||
1291 | Since the ``TARGET_READ_PC'' et.al. macro is going to be controlled | |
1292 | by the multi-arch framework, it will eventually be possible to | |
1293 | eliminate the intermediate read_pc_pid(). The client would call | |
1294 | TARGET_READ_PC directly. (cagney). */ | |
1295 | ||
32178cab | 1296 | CORE_ADDR |
39f77062 | 1297 | generic_target_read_pc (ptid_t ptid) |
32178cab MS |
1298 | { |
1299 | #ifdef PC_REGNUM | |
1300 | if (PC_REGNUM >= 0) | |
1301 | { | |
39f77062 | 1302 | CORE_ADDR pc_val = ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, ptid)); |
32178cab MS |
1303 | return pc_val; |
1304 | } | |
1305 | #endif | |
8e65ff28 AC |
1306 | internal_error (__FILE__, __LINE__, |
1307 | "generic_target_read_pc"); | |
32178cab MS |
1308 | return 0; |
1309 | } | |
1310 | ||
1311 | CORE_ADDR | |
39f77062 | 1312 | read_pc_pid (ptid_t ptid) |
32178cab | 1313 | { |
39f77062 | 1314 | ptid_t saved_inferior_ptid; |
32178cab MS |
1315 | CORE_ADDR pc_val; |
1316 | ||
39f77062 KB |
1317 | /* In case ptid != inferior_ptid. */ |
1318 | saved_inferior_ptid = inferior_ptid; | |
1319 | inferior_ptid = ptid; | |
32178cab | 1320 | |
39f77062 | 1321 | pc_val = TARGET_READ_PC (ptid); |
32178cab | 1322 | |
39f77062 | 1323 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1324 | return pc_val; |
1325 | } | |
1326 | ||
1327 | CORE_ADDR | |
1328 | read_pc (void) | |
1329 | { | |
39f77062 | 1330 | return read_pc_pid (inferior_ptid); |
32178cab MS |
1331 | } |
1332 | ||
32178cab | 1333 | void |
39f77062 | 1334 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
32178cab MS |
1335 | { |
1336 | #ifdef PC_REGNUM | |
1337 | if (PC_REGNUM >= 0) | |
39f77062 | 1338 | write_register_pid (PC_REGNUM, pc, ptid); |
32178cab | 1339 | if (NPC_REGNUM >= 0) |
39f77062 | 1340 | write_register_pid (NPC_REGNUM, pc + 4, ptid); |
32178cab | 1341 | #else |
8e65ff28 AC |
1342 | internal_error (__FILE__, __LINE__, |
1343 | "generic_target_write_pc"); | |
32178cab MS |
1344 | #endif |
1345 | } | |
1346 | ||
1347 | void | |
39f77062 | 1348 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1349 | { |
39f77062 | 1350 | ptid_t saved_inferior_ptid; |
32178cab | 1351 | |
39f77062 KB |
1352 | /* In case ptid != inferior_ptid. */ |
1353 | saved_inferior_ptid = inferior_ptid; | |
1354 | inferior_ptid = ptid; | |
32178cab | 1355 | |
39f77062 | 1356 | TARGET_WRITE_PC (pc, ptid); |
32178cab | 1357 | |
39f77062 | 1358 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1359 | } |
1360 | ||
1361 | void | |
1362 | write_pc (CORE_ADDR pc) | |
1363 | { | |
39f77062 | 1364 | write_pc_pid (pc, inferior_ptid); |
32178cab MS |
1365 | } |
1366 | ||
1367 | /* Cope with strage ways of getting to the stack and frame pointers */ | |
1368 | ||
32178cab MS |
1369 | CORE_ADDR |
1370 | generic_target_read_sp (void) | |
1371 | { | |
1372 | #ifdef SP_REGNUM | |
1373 | if (SP_REGNUM >= 0) | |
1374 | return read_register (SP_REGNUM); | |
1375 | #endif | |
8e65ff28 AC |
1376 | internal_error (__FILE__, __LINE__, |
1377 | "generic_target_read_sp"); | |
32178cab MS |
1378 | } |
1379 | ||
1380 | CORE_ADDR | |
1381 | read_sp (void) | |
1382 | { | |
1383 | return TARGET_READ_SP (); | |
1384 | } | |
1385 | ||
32178cab MS |
1386 | void |
1387 | generic_target_write_sp (CORE_ADDR val) | |
1388 | { | |
1389 | #ifdef SP_REGNUM | |
1390 | if (SP_REGNUM >= 0) | |
1391 | { | |
1392 | write_register (SP_REGNUM, val); | |
1393 | return; | |
1394 | } | |
1395 | #endif | |
8e65ff28 AC |
1396 | internal_error (__FILE__, __LINE__, |
1397 | "generic_target_write_sp"); | |
32178cab MS |
1398 | } |
1399 | ||
32178cab | 1400 | CORE_ADDR |
0ba6dca9 | 1401 | deprecated_read_fp (void) |
32178cab | 1402 | { |
0ba6dca9 AC |
1403 | if (DEPRECATED_TARGET_READ_FP_P ()) |
1404 | return DEPRECATED_TARGET_READ_FP (); | |
1405 | else if (DEPRECATED_FP_REGNUM >= 0) | |
1406 | return read_register (DEPRECATED_FP_REGNUM); | |
1407 | else | |
1408 | internal_error (__FILE__, __LINE__, "deprecated_read_fp"); | |
32178cab MS |
1409 | } |
1410 | ||
705152c5 MS |
1411 | /* ARGSUSED */ |
1412 | static void | |
1413 | reg_flush_command (char *command, int from_tty) | |
1414 | { | |
1415 | /* Force-flush the register cache. */ | |
1416 | registers_changed (); | |
1417 | if (from_tty) | |
1418 | printf_filtered ("Register cache flushed.\n"); | |
1419 | } | |
1420 | ||
32178cab MS |
1421 | static void |
1422 | build_regcache (void) | |
3fadccb3 AC |
1423 | { |
1424 | current_regcache = regcache_xmalloc (current_gdbarch); | |
2d28509a | 1425 | current_regcache->readonly_p = 0; |
524d7c18 | 1426 | deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache); |
8262ee23 | 1427 | deprecated_register_valid = deprecated_grub_regcache_for_register_valid (current_regcache); |
3fadccb3 AC |
1428 | } |
1429 | ||
af030b9a AC |
1430 | static void |
1431 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
1432 | const unsigned char *buf, long len) | |
1433 | { | |
1434 | int i; | |
1435 | switch (endian) | |
1436 | { | |
1437 | case BFD_ENDIAN_BIG: | |
1438 | for (i = 0; i < len; i++) | |
1439 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1440 | break; | |
1441 | case BFD_ENDIAN_LITTLE: | |
1442 | for (i = len - 1; i >= 0; i--) | |
1443 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1444 | break; | |
1445 | default: | |
1446 | internal_error (__FILE__, __LINE__, "Bad switch"); | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | enum regcache_dump_what | |
1451 | { | |
b59ff9d5 | 1452 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
af030b9a AC |
1453 | }; |
1454 | ||
1455 | static void | |
1456 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1457 | enum regcache_dump_what what_to_dump) | |
1458 | { | |
1459 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 AC |
1460 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
1461 | struct reggroup *const *groups = reggroups (gdbarch); | |
af030b9a AC |
1462 | int regnum; |
1463 | int footnote_nr = 0; | |
1464 | int footnote_register_size = 0; | |
1465 | int footnote_register_offset = 0; | |
1466 | int footnote_register_type_name_null = 0; | |
1467 | long register_offset = 0; | |
123a958e | 1468 | unsigned char buf[MAX_REGISTER_SIZE]; |
af030b9a AC |
1469 | |
1470 | #if 0 | |
1471 | fprintf_unfiltered (file, "legacy_p %d\n", regcache->descr->legacy_p); | |
1472 | fprintf_unfiltered (file, "nr_raw_registers %d\n", | |
1473 | regcache->descr->nr_raw_registers); | |
1474 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1475 | regcache->descr->nr_cooked_registers); | |
1476 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1477 | regcache->descr->sizeof_raw_registers); | |
1478 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1479 | regcache->descr->sizeof_raw_register_valid_p); | |
af030b9a AC |
1480 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
1481 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); | |
1482 | #endif | |
1483 | ||
1484 | gdb_assert (regcache->descr->nr_cooked_registers | |
1485 | == (NUM_REGS + NUM_PSEUDO_REGS)); | |
1486 | ||
1487 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1488 | { | |
1489 | /* Name. */ | |
1490 | if (regnum < 0) | |
1491 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1492 | else | |
1493 | { | |
1494 | const char *p = REGISTER_NAME (regnum); | |
1495 | if (p == NULL) | |
1496 | p = ""; | |
1497 | else if (p[0] == '\0') | |
1498 | p = "''"; | |
1499 | fprintf_unfiltered (file, " %-10s", p); | |
1500 | } | |
1501 | ||
1502 | /* Number. */ | |
1503 | if (regnum < 0) | |
1504 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1505 | else | |
1506 | fprintf_unfiltered (file, " %4d", regnum); | |
1507 | ||
1508 | /* Relative number. */ | |
1509 | if (regnum < 0) | |
1510 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1511 | else if (regnum < NUM_REGS) | |
1512 | fprintf_unfiltered (file, " %4d", regnum); | |
1513 | else | |
1514 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); | |
1515 | ||
1516 | /* Offset. */ | |
1517 | if (regnum < 0) | |
1518 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1519 | else | |
1520 | { | |
1521 | fprintf_unfiltered (file, " %6ld", | |
1522 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1523 | if (register_offset != regcache->descr->register_offset[regnum] |
d3b22ed5 AC |
1524 | || register_offset != REGISTER_BYTE (regnum) |
1525 | || (regnum > 0 | |
1526 | && (regcache->descr->register_offset[regnum] | |
1527 | != (regcache->descr->register_offset[regnum - 1] | |
1528 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1529 | ) | |
af030b9a AC |
1530 | { |
1531 | if (!footnote_register_offset) | |
1532 | footnote_register_offset = ++footnote_nr; | |
1533 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1534 | } | |
1535 | else | |
1536 | fprintf_unfiltered (file, " "); | |
1537 | register_offset = (regcache->descr->register_offset[regnum] | |
1538 | + regcache->descr->sizeof_register[regnum]); | |
1539 | } | |
1540 | ||
1541 | /* Size. */ | |
1542 | if (regnum < 0) | |
1543 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1544 | else | |
1545 | { | |
1546 | fprintf_unfiltered (file, " %5ld", | |
1547 | regcache->descr->sizeof_register[regnum]); | |
1548 | if ((regcache->descr->sizeof_register[regnum] | |
1549 | != REGISTER_RAW_SIZE (regnum)) | |
1550 | || (regcache->descr->sizeof_register[regnum] | |
1551 | != REGISTER_VIRTUAL_SIZE (regnum)) | |
1552 | || (regcache->descr->sizeof_register[regnum] | |
bb425013 AC |
1553 | != TYPE_LENGTH (register_type (regcache->descr->gdbarch, |
1554 | regnum))) | |
af030b9a AC |
1555 | ) |
1556 | { | |
1557 | if (!footnote_register_size) | |
1558 | footnote_register_size = ++footnote_nr; | |
1559 | fprintf_unfiltered (file, "*%d", footnote_register_size); | |
1560 | } | |
1561 | else | |
1562 | fprintf_unfiltered (file, " "); | |
1563 | } | |
1564 | ||
1565 | /* Type. */ | |
b59ff9d5 AC |
1566 | { |
1567 | const char *t; | |
1568 | if (regnum < 0) | |
1569 | t = "Type"; | |
1570 | else | |
1571 | { | |
1572 | static const char blt[] = "builtin_type"; | |
1573 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); | |
1574 | if (t == NULL) | |
1575 | { | |
1576 | char *n; | |
1577 | if (!footnote_register_type_name_null) | |
1578 | footnote_register_type_name_null = ++footnote_nr; | |
1579 | xasprintf (&n, "*%d", footnote_register_type_name_null); | |
1580 | make_cleanup (xfree, n); | |
1581 | t = n; | |
1582 | } | |
1583 | /* Chop a leading builtin_type. */ | |
1584 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1585 | t += strlen (blt); | |
1586 | } | |
1587 | fprintf_unfiltered (file, " %-15s", t); | |
1588 | } | |
1589 | ||
1590 | /* Leading space always present. */ | |
1591 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1592 | |
1593 | /* Value, raw. */ | |
1594 | if (what_to_dump == regcache_dump_raw) | |
1595 | { | |
1596 | if (regnum < 0) | |
1597 | fprintf_unfiltered (file, "Raw value"); | |
1598 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1599 | fprintf_unfiltered (file, "<cooked>"); | |
1600 | else if (!regcache_valid_p (regcache, regnum)) | |
1601 | fprintf_unfiltered (file, "<invalid>"); | |
1602 | else | |
1603 | { | |
1604 | regcache_raw_read (regcache, regnum, buf); | |
1605 | fprintf_unfiltered (file, "0x"); | |
1606 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1607 | REGISTER_RAW_SIZE (regnum)); | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | /* Value, cooked. */ | |
1612 | if (what_to_dump == regcache_dump_cooked) | |
1613 | { | |
1614 | if (regnum < 0) | |
1615 | fprintf_unfiltered (file, "Cooked value"); | |
1616 | else | |
1617 | { | |
1618 | regcache_cooked_read (regcache, regnum, buf); | |
1619 | fprintf_unfiltered (file, "0x"); | |
1620 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1621 | REGISTER_VIRTUAL_SIZE (regnum)); | |
1622 | } | |
1623 | } | |
1624 | ||
b59ff9d5 AC |
1625 | /* Group members. */ |
1626 | if (what_to_dump == regcache_dump_groups) | |
1627 | { | |
1628 | if (regnum < 0) | |
1629 | fprintf_unfiltered (file, "Groups"); | |
1630 | else | |
1631 | { | |
1632 | int i; | |
1633 | const char *sep = ""; | |
1634 | for (i = 0; groups[i] != NULL; i++) | |
1635 | { | |
1636 | if (gdbarch_register_reggroup_p (gdbarch, regnum, groups[i])) | |
1637 | { | |
1638 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (groups[i])); | |
1639 | sep = ","; | |
1640 | } | |
1641 | } | |
1642 | } | |
1643 | } | |
1644 | ||
af030b9a AC |
1645 | fprintf_unfiltered (file, "\n"); |
1646 | } | |
1647 | ||
1648 | if (footnote_register_size) | |
1649 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1650 | footnote_register_size); | |
1651 | if (footnote_register_offset) | |
1652 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1653 | footnote_register_offset); | |
1654 | if (footnote_register_type_name_null) | |
1655 | fprintf_unfiltered (file, | |
1656 | "*%d: Register type's name NULL.\n", | |
1657 | footnote_register_type_name_null); | |
1658 | do_cleanups (cleanups); | |
1659 | } | |
1660 | ||
1661 | static void | |
1662 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1663 | { | |
1664 | if (args == NULL) | |
1665 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); | |
1666 | else | |
1667 | { | |
1668 | struct ui_file *file = gdb_fopen (args, "w"); | |
1669 | if (file == NULL) | |
1670 | perror_with_name ("maintenance print architecture"); | |
1671 | regcache_dump (current_regcache, file, what_to_dump); | |
1672 | ui_file_delete (file); | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | static void | |
1677 | maintenance_print_registers (char *args, int from_tty) | |
1678 | { | |
1679 | regcache_print (args, regcache_dump_none); | |
1680 | } | |
1681 | ||
1682 | static void | |
1683 | maintenance_print_raw_registers (char *args, int from_tty) | |
1684 | { | |
1685 | regcache_print (args, regcache_dump_raw); | |
1686 | } | |
1687 | ||
1688 | static void | |
1689 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1690 | { | |
1691 | regcache_print (args, regcache_dump_cooked); | |
1692 | } | |
1693 | ||
b59ff9d5 AC |
1694 | static void |
1695 | maintenance_print_register_groups (char *args, int from_tty) | |
1696 | { | |
1697 | regcache_print (args, regcache_dump_groups); | |
1698 | } | |
1699 | ||
32178cab MS |
1700 | void |
1701 | _initialize_regcache (void) | |
1702 | { | |
3fadccb3 AC |
1703 | regcache_descr_handle = register_gdbarch_data (init_regcache_descr, |
1704 | xfree_regcache_descr); | |
1705 | REGISTER_GDBARCH_SWAP (current_regcache); | |
524d7c18 | 1706 | register_gdbarch_swap (&deprecated_registers, sizeof (deprecated_registers), NULL); |
8262ee23 | 1707 | register_gdbarch_swap (&deprecated_register_valid, sizeof (deprecated_register_valid), NULL); |
32178cab | 1708 | register_gdbarch_swap (NULL, 0, build_regcache); |
705152c5 MS |
1709 | |
1710 | add_com ("flushregs", class_maintenance, reg_flush_command, | |
1711 | "Force gdb to flush its register cache (maintainer command)"); | |
39f77062 KB |
1712 | |
1713 | /* Initialize the thread/process associated with the current set of | |
1714 | registers. For now, -1 is special, and means `no current process'. */ | |
1715 | registers_ptid = pid_to_ptid (-1); | |
af030b9a AC |
1716 | |
1717 | add_cmd ("registers", class_maintenance, | |
1718 | maintenance_print_registers, | |
1719 | "Print the internal register configuration.\ | |
1720 | Takes an optional file parameter.", | |
1721 | &maintenanceprintlist); | |
1722 | add_cmd ("raw-registers", class_maintenance, | |
1723 | maintenance_print_raw_registers, | |
1724 | "Print the internal register configuration including raw values.\ | |
1725 | Takes an optional file parameter.", | |
1726 | &maintenanceprintlist); | |
1727 | add_cmd ("cooked-registers", class_maintenance, | |
1728 | maintenance_print_cooked_registers, | |
1729 | "Print the internal register configuration including cooked values.\ | |
b59ff9d5 AC |
1730 | Takes an optional file parameter.", |
1731 | &maintenanceprintlist); | |
1732 | add_cmd ("register-groups", class_maintenance, | |
1733 | maintenance_print_register_groups, | |
1734 | "Print the internal register configuration including each register's group.\ | |
af030b9a AC |
1735 | Takes an optional file parameter.", |
1736 | &maintenanceprintlist); | |
1737 | ||
32178cab | 1738 | } |