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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 | ||
b9362cc7 | 85 | static void |
bb425013 AC |
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 | 122 | /* Compute the real size of the register buffer. Start out by |
b8b527c5 AC |
123 | trusting DEPRECATED_REGISTER_BYTES, but then adjust it upwards |
124 | should that be found to not be sufficient. */ | |
125 | /* FIXME: cagney/2002-11-05: Instead of using the macro | |
126 | DEPRECATED_REGISTER_BYTES, this code should, as is done in | |
127 | init_regcache_descr(), compute the total number of register bytes | |
128 | using the accumulated offsets. */ | |
129 | descr->sizeof_cooked_registers = DEPRECATED_REGISTER_BYTES; /* OK */ | |
d138e37a | 130 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 AC |
131 | { |
132 | long regend; | |
133 | /* Keep extending the buffer so that there is always enough | |
134 | space for all registers. The comparison is necessary since | |
135 | legacy code is free to put registers in random places in the | |
136 | buffer separated by holes. Once REGISTER_BYTE() is killed | |
137 | this can be greatly simplified. */ | |
3fadccb3 | 138 | regend = descr->register_offset[i] + descr->sizeof_register[i]; |
067df2e5 AC |
139 | if (descr->sizeof_cooked_registers < regend) |
140 | descr->sizeof_cooked_registers = regend; | |
3fadccb3 | 141 | } |
067df2e5 AC |
142 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
143 | in the register cache. Unfortunatly some architectures still | |
144 | rely on this and the pseudo_register_write() method. */ | |
145 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
3fadccb3 AC |
146 | } |
147 | ||
148 | static void * | |
149 | init_regcache_descr (struct gdbarch *gdbarch) | |
150 | { | |
151 | int i; | |
152 | struct regcache_descr *descr; | |
153 | gdb_assert (gdbarch != NULL); | |
154 | ||
bb425013 AC |
155 | /* Create an initial, zero filled, table. */ |
156 | descr = XCALLOC (1, struct regcache_descr); | |
3fadccb3 | 157 | descr->gdbarch = gdbarch; |
3fadccb3 | 158 | |
d138e37a AC |
159 | /* Total size of the register space. The raw registers are mapped |
160 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 161 | either mapped onto raw-registers or memory. */ |
d138e37a | 162 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
067df2e5 | 163 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
3fadccb3 | 164 | |
bb425013 AC |
165 | /* Fill in a table of register types. */ |
166 | descr->register_type = XCALLOC (descr->nr_cooked_registers, | |
167 | struct type *); | |
168 | for (i = 0; i < descr->nr_cooked_registers; i++) | |
169 | { | |
35cac7cf AC |
170 | if (gdbarch_register_type_p (gdbarch)) |
171 | { | |
172 | gdb_assert (!REGISTER_VIRTUAL_TYPE_P ()); /* OK */ | |
173 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); | |
174 | } | |
175 | else | |
176 | descr->register_type[i] = REGISTER_VIRTUAL_TYPE (i); /* OK */ | |
bb425013 AC |
177 | } |
178 | ||
179 | /* If an old style architecture, fill in the remainder of the | |
180 | register cache descriptor using the register macros. */ | |
181 | if (!gdbarch_pseudo_register_read_p (gdbarch) | |
35cac7cf AC |
182 | && !gdbarch_pseudo_register_write_p (gdbarch) |
183 | && !gdbarch_register_type_p (gdbarch)) | |
bb425013 | 184 | { |
46654a5b AC |
185 | /* NOTE: cagney/2003-05-02: Don't add a test for REGISTER_BYTE_P |
186 | to the above. Doing that would cause all the existing | |
187 | architectures to revert back to the legacy regcache | |
188 | mechanisms, and that is not a good thing. Instead just, | |
189 | later, check that the register cache's layout is consistent | |
190 | with REGISTER_BYTE. */ | |
bb425013 AC |
191 | descr->legacy_p = 1; |
192 | init_legacy_regcache_descr (gdbarch, descr); | |
193 | return descr; | |
194 | } | |
195 | ||
3fadccb3 AC |
196 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
197 | into the register cache. */ | |
198 | descr->nr_raw_registers = NUM_REGS; | |
53826de9 AC |
199 | |
200 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p | |
201 | array. This pretects GDB from erant code that accesses elements | |
202 | of the global register_valid_p[] array in the range [NUM_REGS | |
203 | .. NUM_REGS + NUM_PSEUDO_REGS). */ | |
067df2e5 | 204 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
3fadccb3 | 205 | |
067df2e5 | 206 | /* Lay out the register cache. |
3fadccb3 | 207 | |
bb425013 AC |
208 | NOTE: cagney/2002-05-22: Only register_type() is used when |
209 | constructing the register cache. It is assumed that the | |
210 | register's raw size, virtual size and type length are all the | |
211 | same. */ | |
3fadccb3 AC |
212 | |
213 | { | |
214 | long offset = 0; | |
d138e37a AC |
215 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
216 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
d138e37a | 217 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 218 | { |
bb425013 | 219 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
220 | descr->register_offset[i] = offset; |
221 | offset += descr->sizeof_register[i]; | |
123a958e | 222 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
3fadccb3 AC |
223 | } |
224 | /* Set the real size of the register cache buffer. */ | |
067df2e5 | 225 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
226 | } |
227 | ||
067df2e5 AC |
228 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
229 | the raw registers. Unfortunatly some code still accesses the | |
230 | register array directly using the global registers[]. Until that | |
231 | code has been purged, play safe and over allocating the register | |
232 | buffer. Ulgh! */ | |
233 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
234 | ||
46654a5b AC |
235 | /* Sanity check. Confirm that there is agreement between the |
236 | regcache and the target's redundant REGISTER_BYTE (new targets | |
237 | should not even be defining it). */ | |
d138e37a | 238 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 239 | { |
46654a5b AC |
240 | if (REGISTER_BYTE_P ()) |
241 | gdb_assert (descr->register_offset[i] == REGISTER_BYTE (i)); | |
242 | #if 0 | |
3fadccb3 AC |
243 | gdb_assert (descr->sizeof_register[i] == REGISTER_RAW_SIZE (i)); |
244 | gdb_assert (descr->sizeof_register[i] == REGISTER_VIRTUAL_SIZE (i)); | |
46654a5b | 245 | #endif |
3fadccb3 | 246 | } |
b8b527c5 | 247 | /* gdb_assert (descr->sizeof_raw_registers == DEPRECATED_REGISTER_BYTES (i)); */ |
3fadccb3 AC |
248 | |
249 | return descr; | |
250 | } | |
251 | ||
252 | static struct regcache_descr * | |
253 | regcache_descr (struct gdbarch *gdbarch) | |
254 | { | |
255 | return gdbarch_data (gdbarch, regcache_descr_handle); | |
256 | } | |
257 | ||
258 | static void | |
259 | xfree_regcache_descr (struct gdbarch *gdbarch, void *ptr) | |
260 | { | |
261 | struct regcache_descr *descr = ptr; | |
262 | if (descr == NULL) | |
263 | return; | |
264 | xfree (descr->register_offset); | |
265 | xfree (descr->sizeof_register); | |
266 | descr->register_offset = NULL; | |
267 | descr->sizeof_register = NULL; | |
268 | xfree (descr); | |
269 | } | |
270 | ||
bb425013 AC |
271 | /* Utility functions returning useful register attributes stored in |
272 | the regcache descr. */ | |
273 | ||
274 | struct type * | |
275 | register_type (struct gdbarch *gdbarch, int regnum) | |
276 | { | |
277 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
278 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
279 | return descr->register_type[regnum]; | |
280 | } | |
281 | ||
0ed04cce AC |
282 | /* Utility functions returning useful register attributes stored in |
283 | the regcache descr. */ | |
284 | ||
08a617da AC |
285 | int |
286 | register_size (struct gdbarch *gdbarch, int regnum) | |
287 | { | |
288 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
289 | int size; | |
290 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); | |
291 | size = descr->sizeof_register[regnum]; | |
292 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ | |
293 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ | |
294 | return size; | |
295 | } | |
296 | ||
3fadccb3 AC |
297 | /* The register cache for storing raw register values. */ |
298 | ||
299 | struct regcache | |
300 | { | |
301 | struct regcache_descr *descr; | |
51b1fe4e AC |
302 | /* The register buffers. A read-only register cache can hold the |
303 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write | |
304 | register cache can only hold [0 .. NUM_REGS). */ | |
305 | char *registers; | |
306 | char *register_valid_p; | |
2d28509a AC |
307 | /* Is this a read-only cache? A read-only cache is used for saving |
308 | the target's register state (e.g, across an inferior function | |
309 | call or just before forcing a function return). A read-only | |
310 | cache can only be updated via the methods regcache_dup() and | |
311 | regcache_cpy(). The actual contents are determined by the | |
312 | reggroup_save and reggroup_restore methods. */ | |
313 | int readonly_p; | |
3fadccb3 AC |
314 | }; |
315 | ||
316 | struct regcache * | |
317 | regcache_xmalloc (struct gdbarch *gdbarch) | |
318 | { | |
319 | struct regcache_descr *descr; | |
320 | struct regcache *regcache; | |
321 | gdb_assert (gdbarch != NULL); | |
322 | descr = regcache_descr (gdbarch); | |
323 | regcache = XMALLOC (struct regcache); | |
324 | regcache->descr = descr; | |
51b1fe4e | 325 | regcache->registers |
3fadccb3 | 326 | = XCALLOC (descr->sizeof_raw_registers, char); |
51b1fe4e | 327 | regcache->register_valid_p |
3fadccb3 | 328 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
2d28509a | 329 | regcache->readonly_p = 1; |
3fadccb3 AC |
330 | return regcache; |
331 | } | |
332 | ||
333 | void | |
334 | regcache_xfree (struct regcache *regcache) | |
335 | { | |
336 | if (regcache == NULL) | |
337 | return; | |
51b1fe4e AC |
338 | xfree (regcache->registers); |
339 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
340 | xfree (regcache); |
341 | } | |
342 | ||
b9362cc7 | 343 | static void |
36160dc4 AC |
344 | do_regcache_xfree (void *data) |
345 | { | |
346 | regcache_xfree (data); | |
347 | } | |
348 | ||
349 | struct cleanup * | |
350 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
351 | { | |
352 | return make_cleanup (do_regcache_xfree, regcache); | |
353 | } | |
354 | ||
51b1fe4e AC |
355 | /* Return a pointer to register REGNUM's buffer cache. */ |
356 | ||
357 | static char * | |
358 | register_buffer (struct regcache *regcache, int regnum) | |
359 | { | |
360 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
361 | } | |
362 | ||
2d28509a | 363 | void |
5602984a AC |
364 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
365 | void *src) | |
2d28509a AC |
366 | { |
367 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 368 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 369 | int regnum; |
2d28509a | 370 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 371 | end up trying to write the register values back out to the |
2d28509a | 372 | target. */ |
2d28509a AC |
373 | gdb_assert (dst->readonly_p); |
374 | /* Clear the dest. */ | |
375 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
376 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); | |
377 | /* Copy over any registers (identified by their membership in the | |
5602984a AC |
378 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
379 | NUM_PSEUDO_REGS) range is checked since some architectures need | |
380 | to save/restore `cooked' registers that live in memory. */ | |
2d28509a AC |
381 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
382 | { | |
383 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
384 | { | |
5602984a AC |
385 | int valid = cooked_read (src, regnum, buf); |
386 | if (valid) | |
387 | { | |
388 | memcpy (register_buffer (dst, regnum), buf, | |
389 | register_size (gdbarch, regnum)); | |
390 | dst->register_valid_p[regnum] = 1; | |
391 | } | |
2d28509a AC |
392 | } |
393 | } | |
394 | } | |
395 | ||
396 | void | |
5602984a AC |
397 | regcache_restore (struct regcache *dst, |
398 | regcache_cooked_read_ftype *cooked_read, | |
399 | void *src) | |
2d28509a AC |
400 | { |
401 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 402 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 403 | int regnum; |
5602984a AC |
404 | /* The dst had better not be read-only. If it is, the `restore' |
405 | doesn't make much sense. */ | |
2d28509a | 406 | gdb_assert (!dst->readonly_p); |
2d28509a | 407 | /* Copy over any registers, being careful to only restore those that |
5602984a AC |
408 | were both saved and need to be restored. The full [0 .. NUM_REGS |
409 | + NUM_PSEUDO_REGS) range is checked since some architectures need | |
410 | to save/restore `cooked' registers that live in memory. */ | |
411 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 412 | { |
5602984a | 413 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 414 | { |
5602984a AC |
415 | int valid = cooked_read (src, regnum, buf); |
416 | if (valid) | |
417 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
418 | } |
419 | } | |
420 | } | |
421 | ||
5602984a AC |
422 | static int |
423 | do_cooked_read (void *src, int regnum, void *buf) | |
424 | { | |
425 | struct regcache *regcache = src; | |
426 | if (!regcache_valid_p (regcache, regnum) | |
427 | && regcache->readonly_p) | |
428 | /* Don't even think about fetching a register from a read-only | |
429 | cache when the register isn't yet valid. There isn't a target | |
430 | from which the register value can be fetched. */ | |
431 | return 0; | |
432 | regcache_cooked_read (regcache, regnum, buf); | |
433 | return 1; | |
434 | } | |
435 | ||
436 | ||
3fadccb3 AC |
437 | void |
438 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
439 | { | |
440 | int i; | |
441 | char *buf; | |
442 | gdb_assert (src != NULL && dst != NULL); | |
443 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
444 | gdb_assert (src != dst); | |
2d28509a AC |
445 | gdb_assert (src->readonly_p || dst->readonly_p); |
446 | if (!src->readonly_p) | |
5602984a | 447 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 448 | else if (!dst->readonly_p) |
5602984a | 449 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
450 | else |
451 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
452 | } |
453 | ||
454 | void | |
455 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
456 | { | |
457 | int i; | |
458 | gdb_assert (src != NULL && dst != NULL); | |
459 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
460 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
461 | move of data into the current_regcache(). Doing this would be | |
462 | silly - it would mean that valid_p would be completly invalid. */ | |
463 | gdb_assert (dst != current_regcache); | |
51b1fe4e AC |
464 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
465 | memcpy (dst->register_valid_p, src->register_valid_p, | |
3fadccb3 AC |
466 | dst->descr->sizeof_raw_register_valid_p); |
467 | } | |
468 | ||
469 | struct regcache * | |
470 | regcache_dup (struct regcache *src) | |
471 | { | |
472 | struct regcache *newbuf; | |
473 | gdb_assert (current_regcache != NULL); | |
474 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
475 | regcache_cpy (newbuf, src); | |
476 | return newbuf; | |
477 | } | |
478 | ||
479 | struct regcache * | |
480 | regcache_dup_no_passthrough (struct regcache *src) | |
481 | { | |
482 | struct regcache *newbuf; | |
483 | gdb_assert (current_regcache != NULL); | |
484 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
485 | regcache_cpy_no_passthrough (newbuf, src); | |
486 | return newbuf; | |
487 | } | |
488 | ||
489 | int | |
490 | regcache_valid_p (struct regcache *regcache, int regnum) | |
491 | { | |
492 | gdb_assert (regcache != NULL); | |
493 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
51b1fe4e | 494 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
495 | } |
496 | ||
3fadccb3 AC |
497 | char * |
498 | deprecated_grub_regcache_for_registers (struct regcache *regcache) | |
499 | { | |
51b1fe4e | 500 | return regcache->registers; |
3fadccb3 AC |
501 | } |
502 | ||
3fadccb3 AC |
503 | /* Global structure containing the current regcache. */ |
504 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and | |
8262ee23 | 505 | deprecated_register_valid[] currently point into this structure. */ |
3fadccb3 AC |
506 | struct regcache *current_regcache; |
507 | ||
5ebd2499 | 508 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
509 | recording if the register values have been changed (eg. by the |
510 | user). Therefore all registers must be written back to the | |
511 | target when appropriate. */ | |
512 | ||
513 | /* REGISTERS contains the cached register values (in target byte order). */ | |
514 | ||
524d7c18 | 515 | char *deprecated_registers; |
32178cab | 516 | |
8262ee23 | 517 | /* DEPRECATED_REGISTER_VALID is 0 if the register needs to be fetched, |
32178cab MS |
518 | 1 if it has been fetched, and |
519 | -1 if the register value was not available. | |
c97dcfc7 AC |
520 | |
521 | "Not available" indicates that the target is not not able to supply | |
522 | the register at this state. The register may become available at a | |
523 | later time (after the next resume). This often occures when GDB is | |
524 | manipulating a target that contains only a snapshot of the entire | |
525 | system being debugged - some of the registers in such a system may | |
526 | not have been saved. */ | |
32178cab | 527 | |
8262ee23 | 528 | signed char *deprecated_register_valid; |
32178cab | 529 | |
39f77062 | 530 | /* The thread/process associated with the current set of registers. */ |
32178cab | 531 | |
39f77062 | 532 | static ptid_t registers_ptid; |
32178cab MS |
533 | |
534 | /* | |
535 | * FUNCTIONS: | |
536 | */ | |
537 | ||
538 | /* REGISTER_CACHED() | |
539 | ||
540 | Returns 0 if the value is not in the cache (needs fetch). | |
541 | >0 if the value is in the cache. | |
542 | <0 if the value is permanently unavailable (don't ask again). */ | |
543 | ||
544 | int | |
545 | register_cached (int regnum) | |
546 | { | |
8262ee23 | 547 | return deprecated_register_valid[regnum]; |
32178cab MS |
548 | } |
549 | ||
7302a204 ND |
550 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
551 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ | |
552 | ||
553 | void | |
554 | set_register_cached (int regnum, int state) | |
555 | { | |
53826de9 AC |
556 | gdb_assert (regnum >= 0); |
557 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); | |
51b1fe4e | 558 | current_regcache->register_valid_p[regnum] = state; |
7302a204 ND |
559 | } |
560 | ||
561 | /* Return whether register REGNUM is a real register. */ | |
562 | ||
563 | static int | |
564 | real_register (int regnum) | |
565 | { | |
566 | return regnum >= 0 && regnum < NUM_REGS; | |
567 | } | |
568 | ||
32178cab MS |
569 | /* Low level examining and depositing of registers. |
570 | ||
571 | The caller is responsible for making sure that the inferior is | |
572 | stopped before calling the fetching routines, or it will get | |
573 | garbage. (a change from GDB version 3, in which the caller got the | |
574 | value from the last stop). */ | |
575 | ||
576 | /* REGISTERS_CHANGED () | |
577 | ||
578 | Indicate that registers may have changed, so invalidate the cache. */ | |
579 | ||
580 | void | |
581 | registers_changed (void) | |
582 | { | |
583 | int i; | |
32178cab | 584 | |
39f77062 | 585 | registers_ptid = pid_to_ptid (-1); |
32178cab MS |
586 | |
587 | /* Force cleanup of any alloca areas if using C alloca instead of | |
588 | a builtin alloca. This particular call is used to clean up | |
589 | areas allocated by low level target code which may build up | |
590 | during lengthy interactions between gdb and the target before | |
591 | gdb gives control to the user (ie watchpoints). */ | |
592 | alloca (0); | |
593 | ||
53826de9 | 594 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
7302a204 | 595 | set_register_cached (i, 0); |
32178cab MS |
596 | |
597 | if (registers_changed_hook) | |
598 | registers_changed_hook (); | |
599 | } | |
600 | ||
2b9e5f3f | 601 | /* DEPRECATED_REGISTERS_FETCHED () |
32178cab MS |
602 | |
603 | Indicate that all registers have been fetched, so mark them all valid. */ | |
604 | ||
31e9866e AC |
605 | /* NOTE: cagney/2001-12-04: This function does not set valid on the |
606 | pseudo-register range since pseudo registers are always supplied | |
607 | using supply_register(). */ | |
608 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target | |
609 | code was blatting the registers[] array and then calling this. | |
610 | Since targets should only be using supply_register() the need for | |
611 | this function/hack is eliminated. */ | |
32178cab MS |
612 | |
613 | void | |
2b9e5f3f | 614 | deprecated_registers_fetched (void) |
32178cab MS |
615 | { |
616 | int i; | |
32178cab | 617 | |
a728f042 | 618 | for (i = 0; i < NUM_REGS; i++) |
7302a204 | 619 | set_register_cached (i, 1); |
fcdc5976 | 620 | /* Do not assume that the pseudo-regs have also been fetched. |
31e9866e | 621 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
32178cab MS |
622 | } |
623 | ||
73937e03 AC |
624 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
625 | are generally a *BAD* idea. They are inefficient because they need | |
626 | to check for partial updates, which can only be done by scanning | |
627 | through all of the registers and seeing if the bytes that are being | |
628 | read/written fall inside of an invalid register. [The main reason | |
629 | this is necessary is that register sizes can vary, so a simple | |
630 | index won't suffice.] It is far better to call read_register_gen | |
631 | and write_register_gen if you want to get at the raw register | |
632 | contents, as it only takes a regnum as an argument, and therefore | |
633 | can't do a partial register update. | |
32178cab MS |
634 | |
635 | Prior to the recent fixes to check for partial updates, both read | |
73937e03 AC |
636 | and deprecated_write_register_bytes always checked to see if any |
637 | registers were stale, and then called target_fetch_registers (-1) | |
638 | to update the whole set. This caused really slowed things down for | |
639 | remote targets. */ | |
32178cab MS |
640 | |
641 | /* Copy INLEN bytes of consecutive data from registers | |
642 | starting with the INREGBYTE'th byte of register data | |
643 | into memory at MYADDR. */ | |
644 | ||
645 | void | |
73937e03 | 646 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
32178cab | 647 | { |
61a0eb5b | 648 | int in_end = in_start + in_len; |
5ebd2499 | 649 | int regnum; |
d9d9c31f | 650 | char reg_buf[MAX_REGISTER_SIZE]; |
32178cab MS |
651 | |
652 | /* See if we are trying to read bytes from out-of-date registers. If so, | |
653 | update just those registers. */ | |
654 | ||
5ebd2499 | 655 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab | 656 | { |
61a0eb5b AC |
657 | int reg_start; |
658 | int reg_end; | |
659 | int reg_len; | |
660 | int start; | |
661 | int end; | |
662 | int byte; | |
32178cab | 663 | |
61a0eb5b AC |
664 | reg_start = REGISTER_BYTE (regnum); |
665 | reg_len = REGISTER_RAW_SIZE (regnum); | |
666 | reg_end = reg_start + reg_len; | |
32178cab | 667 | |
61a0eb5b | 668 | if (reg_end <= in_start || in_end <= reg_start) |
5ebd2499 | 669 | /* The range the user wants to read doesn't overlap with regnum. */ |
32178cab MS |
670 | continue; |
671 | ||
275f450c AC |
672 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
673 | /* Force the cache to fetch the entire register. */ | |
4caf0990 | 674 | deprecated_read_register_gen (regnum, reg_buf); |
275f450c AC |
675 | else |
676 | /* Legacy note: even though this register is ``invalid'' we | |
677 | still need to return something. It would appear that some | |
678 | code relies on apparent gaps in the register array also | |
679 | being returned. */ | |
680 | /* FIXME: cagney/2001-08-18: This is just silly. It defeats | |
681 | the entire register read/write flow of control. Must | |
682 | resist temptation to return 0xdeadbeef. */ | |
524d7c18 | 683 | memcpy (reg_buf, &deprecated_registers[reg_start], reg_len); |
32178cab | 684 | |
61a0eb5b AC |
685 | /* Legacy note: This function, for some reason, allows a NULL |
686 | input buffer. If the buffer is NULL, the registers are still | |
687 | fetched, just the final transfer is skipped. */ | |
688 | if (in_buf == NULL) | |
689 | continue; | |
690 | ||
691 | /* start = max (reg_start, in_start) */ | |
692 | if (reg_start > in_start) | |
693 | start = reg_start; | |
694 | else | |
695 | start = in_start; | |
696 | ||
697 | /* end = min (reg_end, in_end) */ | |
698 | if (reg_end < in_end) | |
699 | end = reg_end; | |
700 | else | |
701 | end = in_end; | |
702 | ||
703 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ | |
704 | for (byte = start; byte < end; byte++) | |
165cd47f | 705 | { |
61a0eb5b | 706 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
165cd47f | 707 | } |
32178cab | 708 | } |
32178cab MS |
709 | } |
710 | ||
5ebd2499 ND |
711 | /* Read register REGNUM into memory at MYADDR, which must be large |
712 | enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the | |
32178cab MS |
713 | register is known to be the size of a CORE_ADDR or smaller, |
714 | read_register can be used instead. */ | |
715 | ||
61a0eb5b AC |
716 | static void |
717 | legacy_read_register_gen (int regnum, char *myaddr) | |
32178cab | 718 | { |
61a0eb5b | 719 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
39f77062 | 720 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
721 | { |
722 | registers_changed (); | |
39f77062 | 723 | registers_ptid = inferior_ptid; |
32178cab MS |
724 | } |
725 | ||
7302a204 | 726 | if (!register_cached (regnum)) |
5c27f28a | 727 | target_fetch_registers (regnum); |
7302a204 | 728 | |
3fadccb3 | 729 | memcpy (myaddr, register_buffer (current_regcache, regnum), |
5ebd2499 | 730 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
731 | } |
732 | ||
61a0eb5b | 733 | void |
1aaa5f99 | 734 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
61a0eb5b | 735 | { |
3fadccb3 AC |
736 | gdb_assert (regcache != NULL && buf != NULL); |
737 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
738 | if (regcache->descr->legacy_p | |
2d28509a | 739 | && !regcache->readonly_p) |
3fadccb3 AC |
740 | { |
741 | gdb_assert (regcache == current_regcache); | |
742 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
743 | silently and very indirectly updates the regcache's regcache | |
8262ee23 | 744 | via the global deprecated_register_valid[]. */ |
3fadccb3 AC |
745 | legacy_read_register_gen (regnum, buf); |
746 | return; | |
747 | } | |
748 | /* Make certain that the register cache is up-to-date with respect | |
749 | to the current thread. This switching shouldn't be necessary | |
750 | only there is still only one target side register cache. Sigh! | |
751 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 752 | if (!regcache->readonly_p) |
3fadccb3 AC |
753 | { |
754 | gdb_assert (regcache == current_regcache); | |
755 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
756 | { | |
757 | registers_changed (); | |
758 | registers_ptid = inferior_ptid; | |
759 | } | |
760 | if (!register_cached (regnum)) | |
5c27f28a | 761 | target_fetch_registers (regnum); |
3fadccb3 AC |
762 | } |
763 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 764 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 765 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
766 | } |
767 | ||
28fc6740 AC |
768 | void |
769 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
770 | { | |
771 | char *buf; | |
772 | gdb_assert (regcache != NULL); | |
773 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
774 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
775 | regcache_raw_read (regcache, regnum, buf); | |
776 | (*val) = extract_signed_integer (buf, | |
777 | regcache->descr->sizeof_register[regnum]); | |
778 | } | |
779 | ||
780 | void | |
781 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
782 | ULONGEST *val) | |
783 | { | |
784 | char *buf; | |
785 | gdb_assert (regcache != NULL); | |
786 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
787 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
788 | regcache_raw_read (regcache, regnum, buf); | |
789 | (*val) = extract_unsigned_integer (buf, | |
790 | regcache->descr->sizeof_register[regnum]); | |
791 | } | |
792 | ||
c00dcbe9 MK |
793 | void |
794 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
795 | { | |
796 | void *buf; | |
797 | gdb_assert (regcache != NULL); | |
798 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
799 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
800 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
801 | regcache_raw_write (regcache, regnum, buf); | |
802 | } | |
803 | ||
804 | void | |
805 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
806 | ULONGEST val) | |
807 | { | |
808 | void *buf; | |
809 | gdb_assert (regcache != NULL); | |
810 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
811 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
812 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
813 | regcache_raw_write (regcache, regnum, buf); | |
814 | } | |
815 | ||
61a0eb5b | 816 | void |
4caf0990 | 817 | deprecated_read_register_gen (int regnum, char *buf) |
61a0eb5b | 818 | { |
3fadccb3 AC |
819 | gdb_assert (current_regcache != NULL); |
820 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
821 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
822 | { |
823 | legacy_read_register_gen (regnum, buf); | |
824 | return; | |
825 | } | |
68365089 AC |
826 | regcache_cooked_read (current_regcache, regnum, buf); |
827 | } | |
828 | ||
829 | void | |
29e1842b | 830 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
68365089 | 831 | { |
d138e37a | 832 | gdb_assert (regnum >= 0); |
68365089 AC |
833 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
834 | if (regnum < regcache->descr->nr_raw_registers) | |
835 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
836 | else if (regcache->readonly_p |
837 | && regnum < regcache->descr->nr_cooked_registers | |
838 | && regcache->register_valid_p[regnum]) | |
839 | /* Read-only register cache, perhaphs the cooked value was cached? */ | |
840 | memcpy (buf, register_buffer (regcache, regnum), | |
841 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 842 | else |
68365089 AC |
843 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
844 | regnum, buf); | |
61a0eb5b AC |
845 | } |
846 | ||
a378f419 AC |
847 | void |
848 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
849 | LONGEST *val) | |
850 | { | |
851 | char *buf; | |
852 | gdb_assert (regcache != NULL); | |
a66a9c23 | 853 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
854 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
855 | regcache_cooked_read (regcache, regnum, buf); | |
856 | (*val) = extract_signed_integer (buf, | |
857 | regcache->descr->sizeof_register[regnum]); | |
858 | } | |
859 | ||
860 | void | |
861 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
862 | ULONGEST *val) | |
863 | { | |
864 | char *buf; | |
865 | gdb_assert (regcache != NULL); | |
a66a9c23 | 866 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
867 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
868 | regcache_cooked_read (regcache, regnum, buf); | |
869 | (*val) = extract_unsigned_integer (buf, | |
870 | regcache->descr->sizeof_register[regnum]); | |
871 | } | |
872 | ||
a66a9c23 AC |
873 | void |
874 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
875 | LONGEST val) | |
876 | { | |
877 | void *buf; | |
878 | gdb_assert (regcache != NULL); | |
879 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
880 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
881 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
882 | regcache_cooked_write (regcache, regnum, buf); | |
883 | } | |
884 | ||
885 | void | |
886 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
887 | ULONGEST val) | |
888 | { | |
889 | void *buf; | |
890 | gdb_assert (regcache != NULL); | |
891 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
892 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
893 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
894 | regcache_cooked_write (regcache, regnum, buf); | |
895 | } | |
896 | ||
5ebd2499 ND |
897 | /* Write register REGNUM at MYADDR to the target. MYADDR points at |
898 | REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */ | |
32178cab | 899 | |
61a0eb5b | 900 | static void |
1aaa5f99 | 901 | legacy_write_register_gen (int regnum, const void *myaddr) |
32178cab MS |
902 | { |
903 | int size; | |
61a0eb5b | 904 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
32178cab MS |
905 | |
906 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
907 | change the registers array if something writes to this register. */ | |
5ebd2499 | 908 | if (CANNOT_STORE_REGISTER (regnum)) |
32178cab MS |
909 | return; |
910 | ||
39f77062 | 911 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
912 | { |
913 | registers_changed (); | |
39f77062 | 914 | registers_ptid = inferior_ptid; |
32178cab MS |
915 | } |
916 | ||
5ebd2499 | 917 | size = REGISTER_RAW_SIZE (regnum); |
32178cab | 918 | |
7302a204 | 919 | if (real_register (regnum)) |
1297a2f0 MS |
920 | { |
921 | /* If we have a valid copy of the register, and new value == old | |
922 | value, then don't bother doing the actual store. */ | |
923 | if (register_cached (regnum) | |
3fadccb3 AC |
924 | && (memcmp (register_buffer (current_regcache, regnum), myaddr, size) |
925 | == 0)) | |
1297a2f0 MS |
926 | return; |
927 | else | |
928 | target_prepare_to_store (); | |
929 | } | |
32178cab | 930 | |
3fadccb3 | 931 | memcpy (register_buffer (current_regcache, regnum), myaddr, size); |
32178cab | 932 | |
7302a204 | 933 | set_register_cached (regnum, 1); |
5c27f28a | 934 | target_store_registers (regnum); |
32178cab MS |
935 | } |
936 | ||
61a0eb5b | 937 | void |
1aaa5f99 | 938 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
61a0eb5b | 939 | { |
3fadccb3 AC |
940 | gdb_assert (regcache != NULL && buf != NULL); |
941 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 942 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 943 | |
2d28509a | 944 | if (regcache->descr->legacy_p) |
3fadccb3 AC |
945 | { |
946 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
947 | silently and very indirectly updates the regcache's buffers | |
8262ee23 | 948 | via the globals deprecated_register_valid[] and registers[]. */ |
3fadccb3 AC |
949 | gdb_assert (regcache == current_regcache); |
950 | legacy_write_register_gen (regnum, buf); | |
951 | return; | |
952 | } | |
953 | ||
954 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
955 | change the registers array if something writes to this register. */ | |
956 | if (CANNOT_STORE_REGISTER (regnum)) | |
957 | return; | |
958 | ||
3fadccb3 AC |
959 | /* Make certain that the correct cache is selected. */ |
960 | gdb_assert (regcache == current_regcache); | |
961 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
962 | { | |
963 | registers_changed (); | |
964 | registers_ptid = inferior_ptid; | |
965 | } | |
966 | ||
967 | /* If we have a valid copy of the register, and new value == old | |
968 | value, then don't bother doing the actual store. */ | |
969 | if (regcache_valid_p (regcache, regnum) | |
970 | && (memcmp (register_buffer (regcache, regnum), buf, | |
971 | regcache->descr->sizeof_register[regnum]) == 0)) | |
972 | return; | |
973 | ||
974 | target_prepare_to_store (); | |
975 | memcpy (register_buffer (regcache, regnum), buf, | |
976 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 977 | regcache->register_valid_p[regnum] = 1; |
5c27f28a | 978 | target_store_registers (regnum); |
61a0eb5b AC |
979 | } |
980 | ||
981 | void | |
4caf0990 | 982 | deprecated_write_register_gen (int regnum, char *buf) |
61a0eb5b | 983 | { |
3fadccb3 AC |
984 | gdb_assert (current_regcache != NULL); |
985 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
986 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
987 | { |
988 | legacy_write_register_gen (regnum, buf); | |
989 | return; | |
990 | } | |
68365089 AC |
991 | regcache_cooked_write (current_regcache, regnum, buf); |
992 | } | |
993 | ||
994 | void | |
29e1842b | 995 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
68365089 | 996 | { |
d138e37a | 997 | gdb_assert (regnum >= 0); |
68365089 AC |
998 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
999 | if (regnum < regcache->descr->nr_raw_registers) | |
1000 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 1001 | else |
68365089 | 1002 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 1003 | regnum, buf); |
61a0eb5b AC |
1004 | } |
1005 | ||
32178cab MS |
1006 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
1007 | into registers starting with the MYREGSTART'th byte of register data. */ | |
1008 | ||
1009 | void | |
73937e03 | 1010 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
32178cab MS |
1011 | { |
1012 | int myregend = myregstart + inlen; | |
5ebd2499 | 1013 | int regnum; |
32178cab MS |
1014 | |
1015 | target_prepare_to_store (); | |
1016 | ||
1017 | /* Scan through the registers updating any that are covered by the | |
1018 | range myregstart<=>myregend using write_register_gen, which does | |
1019 | nice things like handling threads, and avoiding updates when the | |
1020 | new and old contents are the same. */ | |
1021 | ||
5ebd2499 | 1022 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab MS |
1023 | { |
1024 | int regstart, regend; | |
1025 | ||
5ebd2499 ND |
1026 | regstart = REGISTER_BYTE (regnum); |
1027 | regend = regstart + REGISTER_RAW_SIZE (regnum); | |
32178cab MS |
1028 | |
1029 | /* Is this register completely outside the range the user is writing? */ | |
1030 | if (myregend <= regstart || regend <= myregstart) | |
1031 | /* do nothing */ ; | |
1032 | ||
1033 | /* Is this register completely within the range the user is writing? */ | |
1034 | else if (myregstart <= regstart && regend <= myregend) | |
4caf0990 | 1035 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
32178cab MS |
1036 | |
1037 | /* The register partially overlaps the range being written. */ | |
1038 | else | |
1039 | { | |
d9d9c31f | 1040 | char regbuf[MAX_REGISTER_SIZE]; |
32178cab MS |
1041 | /* What's the overlap between this register's bytes and |
1042 | those the caller wants to write? */ | |
1043 | int overlapstart = max (regstart, myregstart); | |
1044 | int overlapend = min (regend, myregend); | |
1045 | ||
1046 | /* We may be doing a partial update of an invalid register. | |
1047 | Update it from the target before scribbling on it. */ | |
4caf0990 | 1048 | deprecated_read_register_gen (regnum, regbuf); |
32178cab | 1049 | |
524d7c18 | 1050 | memcpy (&deprecated_registers[overlapstart], |
32178cab MS |
1051 | myaddr + (overlapstart - myregstart), |
1052 | overlapend - overlapstart); | |
1053 | ||
5c27f28a | 1054 | target_store_registers (regnum); |
32178cab MS |
1055 | } |
1056 | } | |
1057 | } | |
1058 | ||
06c0b04e AC |
1059 | /* Perform a partial register transfer using a read, modify, write |
1060 | operation. */ | |
1061 | ||
1062 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
1063 | void *buf); | |
1064 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
1065 | const void *buf); | |
1066 | ||
b9362cc7 | 1067 | static void |
06c0b04e AC |
1068 | regcache_xfer_part (struct regcache *regcache, int regnum, |
1069 | int offset, int len, void *in, const void *out, | |
1070 | regcache_read_ftype *read, regcache_write_ftype *write) | |
1071 | { | |
1072 | struct regcache_descr *descr = regcache->descr; | |
123a958e | 1073 | bfd_byte reg[MAX_REGISTER_SIZE]; |
06c0b04e AC |
1074 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
1075 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
1076 | /* Something to do? */ | |
1077 | if (offset + len == 0) | |
1078 | return; | |
1079 | /* Read (when needed) ... */ | |
1080 | if (in != NULL | |
1081 | || offset > 0 | |
1082 | || offset + len < descr->sizeof_register[regnum]) | |
1083 | { | |
1084 | gdb_assert (read != NULL); | |
1085 | read (regcache, regnum, reg); | |
1086 | } | |
1087 | /* ... modify ... */ | |
1088 | if (in != NULL) | |
1089 | memcpy (in, reg + offset, len); | |
1090 | if (out != NULL) | |
1091 | memcpy (reg + offset, out, len); | |
1092 | /* ... write (when needed). */ | |
1093 | if (out != NULL) | |
1094 | { | |
1095 | gdb_assert (write != NULL); | |
1096 | write (regcache, regnum, reg); | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | void | |
1101 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
1102 | int offset, int len, void *buf) | |
1103 | { | |
1104 | struct regcache_descr *descr = regcache->descr; | |
1105 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1106 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1107 | regcache_raw_read, regcache_raw_write); | |
1108 | } | |
1109 | ||
1110 | void | |
1111 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
1112 | int offset, int len, const void *buf) | |
1113 | { | |
1114 | struct regcache_descr *descr = regcache->descr; | |
1115 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1116 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1117 | regcache_raw_read, regcache_raw_write); | |
1118 | } | |
1119 | ||
1120 | void | |
1121 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
1122 | int offset, int len, void *buf) | |
1123 | { | |
1124 | struct regcache_descr *descr = regcache->descr; | |
1125 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1126 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1127 | regcache_cooked_read, regcache_cooked_write); | |
1128 | } | |
1129 | ||
1130 | void | |
1131 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
1132 | int offset, int len, const void *buf) | |
1133 | { | |
1134 | struct regcache_descr *descr = regcache->descr; | |
1135 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1136 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1137 | regcache_cooked_read, regcache_cooked_write); | |
1138 | } | |
32178cab | 1139 | |
d3b22ed5 AC |
1140 | /* Hack to keep code that view the register buffer as raw bytes |
1141 | working. */ | |
1142 | ||
1143 | int | |
1144 | register_offset_hack (struct gdbarch *gdbarch, int regnum) | |
1145 | { | |
1146 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
1147 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1148 | return descr->register_offset[regnum]; | |
1149 | } | |
1150 | ||
5ebd2499 | 1151 | /* Return the contents of register REGNUM as an unsigned integer. */ |
32178cab | 1152 | |
173155e8 | 1153 | ULONGEST |
5ebd2499 | 1154 | read_register (int regnum) |
32178cab | 1155 | { |
61a0eb5b | 1156 | char *buf = alloca (REGISTER_RAW_SIZE (regnum)); |
4caf0990 | 1157 | deprecated_read_register_gen (regnum, buf); |
61a0eb5b | 1158 | return (extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum))); |
32178cab MS |
1159 | } |
1160 | ||
173155e8 | 1161 | ULONGEST |
39f77062 | 1162 | read_register_pid (int regnum, ptid_t ptid) |
32178cab | 1163 | { |
39f77062 | 1164 | ptid_t save_ptid; |
32178cab MS |
1165 | int save_pid; |
1166 | CORE_ADDR retval; | |
1167 | ||
39f77062 | 1168 | if (ptid_equal (ptid, inferior_ptid)) |
5ebd2499 | 1169 | return read_register (regnum); |
32178cab | 1170 | |
39f77062 | 1171 | save_ptid = inferior_ptid; |
32178cab | 1172 | |
39f77062 | 1173 | inferior_ptid = ptid; |
32178cab | 1174 | |
5ebd2499 | 1175 | retval = read_register (regnum); |
32178cab | 1176 | |
39f77062 | 1177 | inferior_ptid = save_ptid; |
32178cab MS |
1178 | |
1179 | return retval; | |
1180 | } | |
1181 | ||
5ebd2499 | 1182 | /* Store VALUE into the raw contents of register number REGNUM. */ |
32178cab MS |
1183 | |
1184 | void | |
5ebd2499 | 1185 | write_register (int regnum, LONGEST val) |
32178cab | 1186 | { |
61a0eb5b | 1187 | void *buf; |
32178cab | 1188 | int size; |
5ebd2499 | 1189 | size = REGISTER_RAW_SIZE (regnum); |
32178cab MS |
1190 | buf = alloca (size); |
1191 | store_signed_integer (buf, size, (LONGEST) val); | |
4caf0990 | 1192 | deprecated_write_register_gen (regnum, buf); |
32178cab MS |
1193 | } |
1194 | ||
1195 | void | |
39f77062 | 1196 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
32178cab | 1197 | { |
39f77062 | 1198 | ptid_t save_ptid; |
32178cab | 1199 | |
39f77062 | 1200 | if (ptid_equal (ptid, inferior_ptid)) |
32178cab | 1201 | { |
5ebd2499 | 1202 | write_register (regnum, val); |
32178cab MS |
1203 | return; |
1204 | } | |
1205 | ||
39f77062 | 1206 | save_ptid = inferior_ptid; |
32178cab | 1207 | |
39f77062 | 1208 | inferior_ptid = ptid; |
32178cab | 1209 | |
5ebd2499 | 1210 | write_register (regnum, val); |
32178cab | 1211 | |
39f77062 | 1212 | inferior_ptid = save_ptid; |
32178cab MS |
1213 | } |
1214 | ||
1215 | /* SUPPLY_REGISTER() | |
1216 | ||
5ebd2499 | 1217 | Record that register REGNUM contains VAL. This is used when the |
32178cab MS |
1218 | value is obtained from the inferior or core dump, so there is no |
1219 | need to store the value there. | |
1220 | ||
1221 | If VAL is a NULL pointer, then it's probably an unsupported register. | |
5ebd2499 | 1222 | We just set its value to all zeros. We might want to record this |
32178cab MS |
1223 | fact, and report it to the users of read_register and friends. */ |
1224 | ||
1225 | void | |
1aaa5f99 | 1226 | supply_register (int regnum, const void *val) |
32178cab MS |
1227 | { |
1228 | #if 1 | |
39f77062 | 1229 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
1230 | { |
1231 | registers_changed (); | |
39f77062 | 1232 | registers_ptid = inferior_ptid; |
32178cab MS |
1233 | } |
1234 | #endif | |
1235 | ||
7302a204 | 1236 | set_register_cached (regnum, 1); |
32178cab | 1237 | if (val) |
3fadccb3 | 1238 | memcpy (register_buffer (current_regcache, regnum), val, |
5ebd2499 | 1239 | REGISTER_RAW_SIZE (regnum)); |
32178cab | 1240 | else |
3fadccb3 | 1241 | memset (register_buffer (current_regcache, regnum), '\000', |
5ebd2499 | 1242 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
1243 | |
1244 | /* On some architectures, e.g. HPPA, there are a few stray bits in | |
1245 | some registers, that the rest of the code would like to ignore. */ | |
1246 | ||
61a0eb5b AC |
1247 | /* NOTE: cagney/2001-03-16: The macro CLEAN_UP_REGISTER_VALUE is |
1248 | going to be deprecated. Instead architectures will leave the raw | |
1249 | register value as is and instead clean things up as they pass | |
d8124050 | 1250 | through the method gdbarch_pseudo_register_read() clean up the |
61a0eb5b AC |
1251 | values. */ |
1252 | ||
4ee3352d | 1253 | #ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE |
0b434a00 AC |
1254 | DEPRECATED_CLEAN_UP_REGISTER_VALUE \ |
1255 | (regnum, register_buffer (current_regcache, regnum)); | |
32178cab MS |
1256 | #endif |
1257 | } | |
1258 | ||
193cb69f AC |
1259 | void |
1260 | regcache_collect (int regnum, void *buf) | |
1261 | { | |
3fadccb3 AC |
1262 | memcpy (buf, register_buffer (current_regcache, regnum), |
1263 | REGISTER_RAW_SIZE (regnum)); | |
193cb69f AC |
1264 | } |
1265 | ||
1266 | ||
0ba6dca9 AC |
1267 | /* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special |
1268 | handling for registers PC, SP, and FP. */ | |
32178cab | 1269 | |
cde9ea48 AC |
1270 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc(), |
1271 | read_sp(), and deprecated_read_fp(), will eventually be replaced by | |
1272 | per-frame methods. Instead of relying on the global INFERIOR_PTID, | |
1273 | they will use the contextual information provided by the FRAME. | |
1274 | These functions do not belong in the register cache. */ | |
32178cab | 1275 | |
cde9ea48 AC |
1276 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
1277 | write_pc_pid(), write_pc(), and deprecated_read_fp(), all need to | |
1278 | be replaced by something that does not rely on global state. But | |
1279 | what? */ | |
32178cab MS |
1280 | |
1281 | CORE_ADDR | |
39f77062 | 1282 | read_pc_pid (ptid_t ptid) |
32178cab | 1283 | { |
39f77062 | 1284 | ptid_t saved_inferior_ptid; |
32178cab MS |
1285 | CORE_ADDR pc_val; |
1286 | ||
39f77062 KB |
1287 | /* In case ptid != inferior_ptid. */ |
1288 | saved_inferior_ptid = inferior_ptid; | |
1289 | inferior_ptid = ptid; | |
32178cab | 1290 | |
cde9ea48 AC |
1291 | if (TARGET_READ_PC_P ()) |
1292 | pc_val = TARGET_READ_PC (ptid); | |
1293 | /* Else use per-frame method on get_current_frame. */ | |
1294 | else if (PC_REGNUM >= 0) | |
1295 | { | |
1296 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); | |
1297 | CORE_ADDR pc_val = ADDR_BITS_REMOVE (raw_val); | |
1298 | return pc_val; | |
1299 | } | |
1300 | else | |
1301 | internal_error (__FILE__, __LINE__, "read_pc_pid: Unable to find PC"); | |
32178cab | 1302 | |
39f77062 | 1303 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1304 | return pc_val; |
1305 | } | |
1306 | ||
1307 | CORE_ADDR | |
1308 | read_pc (void) | |
1309 | { | |
39f77062 | 1310 | return read_pc_pid (inferior_ptid); |
32178cab MS |
1311 | } |
1312 | ||
32178cab | 1313 | void |
39f77062 | 1314 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
32178cab MS |
1315 | { |
1316 | #ifdef PC_REGNUM | |
1317 | if (PC_REGNUM >= 0) | |
39f77062 | 1318 | write_register_pid (PC_REGNUM, pc, ptid); |
32178cab | 1319 | if (NPC_REGNUM >= 0) |
39f77062 | 1320 | write_register_pid (NPC_REGNUM, pc + 4, ptid); |
32178cab | 1321 | #else |
8e65ff28 AC |
1322 | internal_error (__FILE__, __LINE__, |
1323 | "generic_target_write_pc"); | |
32178cab MS |
1324 | #endif |
1325 | } | |
1326 | ||
1327 | void | |
39f77062 | 1328 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1329 | { |
39f77062 | 1330 | ptid_t saved_inferior_ptid; |
32178cab | 1331 | |
39f77062 KB |
1332 | /* In case ptid != inferior_ptid. */ |
1333 | saved_inferior_ptid = inferior_ptid; | |
1334 | inferior_ptid = ptid; | |
32178cab | 1335 | |
39f77062 | 1336 | TARGET_WRITE_PC (pc, ptid); |
32178cab | 1337 | |
39f77062 | 1338 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1339 | } |
1340 | ||
1341 | void | |
1342 | write_pc (CORE_ADDR pc) | |
1343 | { | |
39f77062 | 1344 | write_pc_pid (pc, inferior_ptid); |
32178cab MS |
1345 | } |
1346 | ||
1347 | /* Cope with strage ways of getting to the stack and frame pointers */ | |
1348 | ||
32178cab MS |
1349 | CORE_ADDR |
1350 | read_sp (void) | |
1351 | { | |
bd1ce8ba AC |
1352 | if (TARGET_READ_SP_P ()) |
1353 | return TARGET_READ_SP (); | |
a9e5fdc2 AC |
1354 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
1355 | return get_frame_sp (get_current_frame ()); | |
bd1ce8ba | 1356 | else if (SP_REGNUM >= 0) |
a9e5fdc2 AC |
1357 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
1358 | about the architecture so put it at the end. */ | |
bd1ce8ba AC |
1359 | return read_register (SP_REGNUM); |
1360 | internal_error (__FILE__, __LINE__, "read_sp: Unable to find SP"); | |
32178cab MS |
1361 | } |
1362 | ||
32178cab | 1363 | void |
b46e02f6 | 1364 | deprecated_write_sp (CORE_ADDR val) |
32178cab | 1365 | { |
b46e02f6 AC |
1366 | gdb_assert (SP_REGNUM >= 0); |
1367 | write_register (SP_REGNUM, val); | |
32178cab MS |
1368 | } |
1369 | ||
32178cab | 1370 | CORE_ADDR |
0ba6dca9 | 1371 | deprecated_read_fp (void) |
32178cab | 1372 | { |
0ba6dca9 AC |
1373 | if (DEPRECATED_TARGET_READ_FP_P ()) |
1374 | return DEPRECATED_TARGET_READ_FP (); | |
1375 | else if (DEPRECATED_FP_REGNUM >= 0) | |
1376 | return read_register (DEPRECATED_FP_REGNUM); | |
1377 | else | |
1378 | internal_error (__FILE__, __LINE__, "deprecated_read_fp"); | |
32178cab MS |
1379 | } |
1380 | ||
705152c5 MS |
1381 | /* ARGSUSED */ |
1382 | static void | |
1383 | reg_flush_command (char *command, int from_tty) | |
1384 | { | |
1385 | /* Force-flush the register cache. */ | |
1386 | registers_changed (); | |
1387 | if (from_tty) | |
1388 | printf_filtered ("Register cache flushed.\n"); | |
1389 | } | |
1390 | ||
32178cab MS |
1391 | static void |
1392 | build_regcache (void) | |
3fadccb3 AC |
1393 | { |
1394 | current_regcache = regcache_xmalloc (current_gdbarch); | |
2d28509a | 1395 | current_regcache->readonly_p = 0; |
524d7c18 | 1396 | deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache); |
b923b08d | 1397 | deprecated_register_valid = current_regcache->register_valid_p; |
3fadccb3 AC |
1398 | } |
1399 | ||
af030b9a AC |
1400 | static void |
1401 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
1402 | const unsigned char *buf, long len) | |
1403 | { | |
1404 | int i; | |
1405 | switch (endian) | |
1406 | { | |
1407 | case BFD_ENDIAN_BIG: | |
1408 | for (i = 0; i < len; i++) | |
1409 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1410 | break; | |
1411 | case BFD_ENDIAN_LITTLE: | |
1412 | for (i = len - 1; i >= 0; i--) | |
1413 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1414 | break; | |
1415 | default: | |
1416 | internal_error (__FILE__, __LINE__, "Bad switch"); | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | enum regcache_dump_what | |
1421 | { | |
b59ff9d5 | 1422 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
af030b9a AC |
1423 | }; |
1424 | ||
1425 | static void | |
1426 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1427 | enum regcache_dump_what what_to_dump) | |
1428 | { | |
1429 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 AC |
1430 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
1431 | struct reggroup *const *groups = reggroups (gdbarch); | |
af030b9a AC |
1432 | int regnum; |
1433 | int footnote_nr = 0; | |
1434 | int footnote_register_size = 0; | |
1435 | int footnote_register_offset = 0; | |
1436 | int footnote_register_type_name_null = 0; | |
1437 | long register_offset = 0; | |
123a958e | 1438 | unsigned char buf[MAX_REGISTER_SIZE]; |
af030b9a AC |
1439 | |
1440 | #if 0 | |
1441 | fprintf_unfiltered (file, "legacy_p %d\n", regcache->descr->legacy_p); | |
1442 | fprintf_unfiltered (file, "nr_raw_registers %d\n", | |
1443 | regcache->descr->nr_raw_registers); | |
1444 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1445 | regcache->descr->nr_cooked_registers); | |
1446 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1447 | regcache->descr->sizeof_raw_registers); | |
1448 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1449 | regcache->descr->sizeof_raw_register_valid_p); | |
af030b9a AC |
1450 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
1451 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); | |
1452 | #endif | |
1453 | ||
1454 | gdb_assert (regcache->descr->nr_cooked_registers | |
1455 | == (NUM_REGS + NUM_PSEUDO_REGS)); | |
1456 | ||
1457 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1458 | { | |
1459 | /* Name. */ | |
1460 | if (regnum < 0) | |
1461 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1462 | else | |
1463 | { | |
1464 | const char *p = REGISTER_NAME (regnum); | |
1465 | if (p == NULL) | |
1466 | p = ""; | |
1467 | else if (p[0] == '\0') | |
1468 | p = "''"; | |
1469 | fprintf_unfiltered (file, " %-10s", p); | |
1470 | } | |
1471 | ||
1472 | /* Number. */ | |
1473 | if (regnum < 0) | |
1474 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1475 | else | |
1476 | fprintf_unfiltered (file, " %4d", regnum); | |
1477 | ||
1478 | /* Relative number. */ | |
1479 | if (regnum < 0) | |
1480 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1481 | else if (regnum < NUM_REGS) | |
1482 | fprintf_unfiltered (file, " %4d", regnum); | |
1483 | else | |
1484 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); | |
1485 | ||
1486 | /* Offset. */ | |
1487 | if (regnum < 0) | |
1488 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1489 | else | |
1490 | { | |
1491 | fprintf_unfiltered (file, " %6ld", | |
1492 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1493 | if (register_offset != regcache->descr->register_offset[regnum] |
d3b22ed5 AC |
1494 | || register_offset != REGISTER_BYTE (regnum) |
1495 | || (regnum > 0 | |
1496 | && (regcache->descr->register_offset[regnum] | |
1497 | != (regcache->descr->register_offset[regnum - 1] | |
1498 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1499 | ) | |
af030b9a AC |
1500 | { |
1501 | if (!footnote_register_offset) | |
1502 | footnote_register_offset = ++footnote_nr; | |
1503 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1504 | } | |
1505 | else | |
1506 | fprintf_unfiltered (file, " "); | |
1507 | register_offset = (regcache->descr->register_offset[regnum] | |
1508 | + regcache->descr->sizeof_register[regnum]); | |
1509 | } | |
1510 | ||
1511 | /* Size. */ | |
1512 | if (regnum < 0) | |
1513 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1514 | else | |
1515 | { | |
1516 | fprintf_unfiltered (file, " %5ld", | |
1517 | regcache->descr->sizeof_register[regnum]); | |
1518 | if ((regcache->descr->sizeof_register[regnum] | |
1519 | != REGISTER_RAW_SIZE (regnum)) | |
1520 | || (regcache->descr->sizeof_register[regnum] | |
1521 | != REGISTER_VIRTUAL_SIZE (regnum)) | |
1522 | || (regcache->descr->sizeof_register[regnum] | |
bb425013 AC |
1523 | != TYPE_LENGTH (register_type (regcache->descr->gdbarch, |
1524 | regnum))) | |
af030b9a AC |
1525 | ) |
1526 | { | |
1527 | if (!footnote_register_size) | |
1528 | footnote_register_size = ++footnote_nr; | |
1529 | fprintf_unfiltered (file, "*%d", footnote_register_size); | |
1530 | } | |
1531 | else | |
1532 | fprintf_unfiltered (file, " "); | |
1533 | } | |
1534 | ||
1535 | /* Type. */ | |
b59ff9d5 AC |
1536 | { |
1537 | const char *t; | |
1538 | if (regnum < 0) | |
1539 | t = "Type"; | |
1540 | else | |
1541 | { | |
1542 | static const char blt[] = "builtin_type"; | |
1543 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); | |
1544 | if (t == NULL) | |
1545 | { | |
1546 | char *n; | |
1547 | if (!footnote_register_type_name_null) | |
1548 | footnote_register_type_name_null = ++footnote_nr; | |
1549 | xasprintf (&n, "*%d", footnote_register_type_name_null); | |
1550 | make_cleanup (xfree, n); | |
1551 | t = n; | |
1552 | } | |
1553 | /* Chop a leading builtin_type. */ | |
1554 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1555 | t += strlen (blt); | |
1556 | } | |
1557 | fprintf_unfiltered (file, " %-15s", t); | |
1558 | } | |
1559 | ||
1560 | /* Leading space always present. */ | |
1561 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1562 | |
1563 | /* Value, raw. */ | |
1564 | if (what_to_dump == regcache_dump_raw) | |
1565 | { | |
1566 | if (regnum < 0) | |
1567 | fprintf_unfiltered (file, "Raw value"); | |
1568 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1569 | fprintf_unfiltered (file, "<cooked>"); | |
1570 | else if (!regcache_valid_p (regcache, regnum)) | |
1571 | fprintf_unfiltered (file, "<invalid>"); | |
1572 | else | |
1573 | { | |
1574 | regcache_raw_read (regcache, regnum, buf); | |
1575 | fprintf_unfiltered (file, "0x"); | |
1576 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1577 | REGISTER_RAW_SIZE (regnum)); | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | /* Value, cooked. */ | |
1582 | if (what_to_dump == regcache_dump_cooked) | |
1583 | { | |
1584 | if (regnum < 0) | |
1585 | fprintf_unfiltered (file, "Cooked value"); | |
1586 | else | |
1587 | { | |
1588 | regcache_cooked_read (regcache, regnum, buf); | |
1589 | fprintf_unfiltered (file, "0x"); | |
1590 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1591 | REGISTER_VIRTUAL_SIZE (regnum)); | |
1592 | } | |
1593 | } | |
1594 | ||
b59ff9d5 AC |
1595 | /* Group members. */ |
1596 | if (what_to_dump == regcache_dump_groups) | |
1597 | { | |
1598 | if (regnum < 0) | |
1599 | fprintf_unfiltered (file, "Groups"); | |
1600 | else | |
1601 | { | |
1602 | int i; | |
1603 | const char *sep = ""; | |
1604 | for (i = 0; groups[i] != NULL; i++) | |
1605 | { | |
1606 | if (gdbarch_register_reggroup_p (gdbarch, regnum, groups[i])) | |
1607 | { | |
1608 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (groups[i])); | |
1609 | sep = ","; | |
1610 | } | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
af030b9a AC |
1615 | fprintf_unfiltered (file, "\n"); |
1616 | } | |
1617 | ||
1618 | if (footnote_register_size) | |
1619 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1620 | footnote_register_size); | |
1621 | if (footnote_register_offset) | |
1622 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1623 | footnote_register_offset); | |
1624 | if (footnote_register_type_name_null) | |
1625 | fprintf_unfiltered (file, | |
1626 | "*%d: Register type's name NULL.\n", | |
1627 | footnote_register_type_name_null); | |
1628 | do_cleanups (cleanups); | |
1629 | } | |
1630 | ||
1631 | static void | |
1632 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1633 | { | |
1634 | if (args == NULL) | |
1635 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); | |
1636 | else | |
1637 | { | |
1638 | struct ui_file *file = gdb_fopen (args, "w"); | |
1639 | if (file == NULL) | |
1640 | perror_with_name ("maintenance print architecture"); | |
1641 | regcache_dump (current_regcache, file, what_to_dump); | |
1642 | ui_file_delete (file); | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | static void | |
1647 | maintenance_print_registers (char *args, int from_tty) | |
1648 | { | |
1649 | regcache_print (args, regcache_dump_none); | |
1650 | } | |
1651 | ||
1652 | static void | |
1653 | maintenance_print_raw_registers (char *args, int from_tty) | |
1654 | { | |
1655 | regcache_print (args, regcache_dump_raw); | |
1656 | } | |
1657 | ||
1658 | static void | |
1659 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1660 | { | |
1661 | regcache_print (args, regcache_dump_cooked); | |
1662 | } | |
1663 | ||
b59ff9d5 AC |
1664 | static void |
1665 | maintenance_print_register_groups (char *args, int from_tty) | |
1666 | { | |
1667 | regcache_print (args, regcache_dump_groups); | |
1668 | } | |
1669 | ||
b9362cc7 AC |
1670 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
1671 | ||
32178cab MS |
1672 | void |
1673 | _initialize_regcache (void) | |
1674 | { | |
3fadccb3 AC |
1675 | regcache_descr_handle = register_gdbarch_data (init_regcache_descr, |
1676 | xfree_regcache_descr); | |
1677 | REGISTER_GDBARCH_SWAP (current_regcache); | |
524d7c18 | 1678 | register_gdbarch_swap (&deprecated_registers, sizeof (deprecated_registers), NULL); |
8262ee23 | 1679 | register_gdbarch_swap (&deprecated_register_valid, sizeof (deprecated_register_valid), NULL); |
32178cab | 1680 | register_gdbarch_swap (NULL, 0, build_regcache); |
705152c5 MS |
1681 | |
1682 | add_com ("flushregs", class_maintenance, reg_flush_command, | |
1683 | "Force gdb to flush its register cache (maintainer command)"); | |
39f77062 KB |
1684 | |
1685 | /* Initialize the thread/process associated with the current set of | |
1686 | registers. For now, -1 is special, and means `no current process'. */ | |
1687 | registers_ptid = pid_to_ptid (-1); | |
af030b9a AC |
1688 | |
1689 | add_cmd ("registers", class_maintenance, | |
1690 | maintenance_print_registers, | |
1691 | "Print the internal register configuration.\ | |
1692 | Takes an optional file parameter.", | |
1693 | &maintenanceprintlist); | |
1694 | add_cmd ("raw-registers", class_maintenance, | |
1695 | maintenance_print_raw_registers, | |
1696 | "Print the internal register configuration including raw values.\ | |
1697 | Takes an optional file parameter.", | |
1698 | &maintenanceprintlist); | |
1699 | add_cmd ("cooked-registers", class_maintenance, | |
1700 | maintenance_print_cooked_registers, | |
1701 | "Print the internal register configuration including cooked values.\ | |
b59ff9d5 AC |
1702 | Takes an optional file parameter.", |
1703 | &maintenanceprintlist); | |
1704 | add_cmd ("register-groups", class_maintenance, | |
1705 | maintenance_print_register_groups, | |
1706 | "Print the internal register configuration including each register's group.\ | |
af030b9a AC |
1707 | Takes an optional file parameter.", |
1708 | &maintenanceprintlist); | |
1709 | ||
32178cab | 1710 | } |