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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 | |
d138e37a AC |
81 | /* Useful constant. Largest of all the registers. */ |
82 | long max_register_size; | |
bb425013 AC |
83 | |
84 | /* Cached table containing the type of each register. */ | |
85 | struct type **register_type; | |
3fadccb3 AC |
86 | }; |
87 | ||
bb425013 AC |
88 | void |
89 | init_legacy_regcache_descr (struct gdbarch *gdbarch, | |
90 | struct regcache_descr *descr) | |
3fadccb3 AC |
91 | { |
92 | int i; | |
3fadccb3 AC |
93 | /* FIXME: cagney/2002-05-11: gdbarch_data() should take that |
94 | ``gdbarch'' as a parameter. */ | |
95 | gdb_assert (gdbarch != NULL); | |
96 | ||
3fadccb3 | 97 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
067df2e5 AC |
98 | in the register cache. Unfortunatly some architectures still |
99 | rely on this and the pseudo_register_write() method. */ | |
d138e37a | 100 | descr->nr_raw_registers = descr->nr_cooked_registers; |
067df2e5 AC |
101 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
102 | ||
103 | /* Compute the offset of each register. Legacy architectures define | |
104 | REGISTER_BYTE() so use that. */ | |
105 | /* FIXME: cagney/2002-11-07: Instead of using REGISTER_BYTE() this | |
106 | code should, as is done in init_regcache_descr(), compute the | |
107 | offets at runtime. This currently isn't possible as some ISAs | |
108 | define overlapping register regions - see the mess in | |
109 | read_register_bytes() and write_register_bytes() registers. */ | |
d138e37a AC |
110 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
111 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
3fadccb3 | 112 | descr->max_register_size = 0; |
d138e37a | 113 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 114 | { |
067df2e5 AC |
115 | /* FIXME: cagney/2001-12-04: This code shouldn't need to use |
116 | REGISTER_BYTE(). Unfortunatly, legacy code likes to lay the | |
117 | buffer out so that certain registers just happen to overlap. | |
118 | Ulgh! New targets use gdbarch's register read/write and | |
119 | entirely avoid this uglyness. */ | |
3fadccb3 AC |
120 | descr->register_offset[i] = REGISTER_BYTE (i); |
121 | descr->sizeof_register[i] = REGISTER_RAW_SIZE (i); | |
122 | if (descr->max_register_size < REGISTER_RAW_SIZE (i)) | |
123 | descr->max_register_size = REGISTER_RAW_SIZE (i); | |
0ed04cce AC |
124 | if (descr->max_register_size < REGISTER_VIRTUAL_SIZE (i)) |
125 | descr->max_register_size = REGISTER_VIRTUAL_SIZE (i); | |
3fadccb3 AC |
126 | } |
127 | ||
067df2e5 AC |
128 | /* Compute the real size of the register buffer. Start out by |
129 | trusting REGISTER_BYTES, but then adjust it upwards should that | |
130 | be found to not be sufficient. */ | |
131 | /* FIXME: cagney/2002-11-05: Instead of using REGISTER_BYTES, this | |
132 | code should, as is done in init_regcache_descr(), compute the | |
133 | total number of register bytes using the accumulated offsets. */ | |
134 | descr->sizeof_cooked_registers = REGISTER_BYTES; /* OK use. */ | |
d138e37a | 135 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 AC |
136 | { |
137 | long regend; | |
138 | /* Keep extending the buffer so that there is always enough | |
139 | space for all registers. The comparison is necessary since | |
140 | legacy code is free to put registers in random places in the | |
141 | buffer separated by holes. Once REGISTER_BYTE() is killed | |
142 | this can be greatly simplified. */ | |
3fadccb3 | 143 | regend = descr->register_offset[i] + descr->sizeof_register[i]; |
067df2e5 AC |
144 | if (descr->sizeof_cooked_registers < regend) |
145 | descr->sizeof_cooked_registers = regend; | |
3fadccb3 | 146 | } |
067df2e5 AC |
147 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
148 | in the register cache. Unfortunatly some architectures still | |
149 | rely on this and the pseudo_register_write() method. */ | |
150 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
3fadccb3 AC |
151 | } |
152 | ||
153 | static void * | |
154 | init_regcache_descr (struct gdbarch *gdbarch) | |
155 | { | |
156 | int i; | |
157 | struct regcache_descr *descr; | |
158 | gdb_assert (gdbarch != NULL); | |
159 | ||
bb425013 AC |
160 | /* Create an initial, zero filled, table. */ |
161 | descr = XCALLOC (1, struct regcache_descr); | |
3fadccb3 | 162 | descr->gdbarch = gdbarch; |
3fadccb3 | 163 | |
d138e37a AC |
164 | /* Total size of the register space. The raw registers are mapped |
165 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 166 | either mapped onto raw-registers or memory. */ |
d138e37a | 167 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
067df2e5 | 168 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
3fadccb3 | 169 | |
bb425013 AC |
170 | /* Fill in a table of register types. */ |
171 | descr->register_type = XCALLOC (descr->nr_cooked_registers, | |
172 | struct type *); | |
173 | for (i = 0; i < descr->nr_cooked_registers; i++) | |
174 | { | |
35cac7cf AC |
175 | if (gdbarch_register_type_p (gdbarch)) |
176 | { | |
177 | gdb_assert (!REGISTER_VIRTUAL_TYPE_P ()); /* OK */ | |
178 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); | |
179 | } | |
180 | else | |
181 | descr->register_type[i] = REGISTER_VIRTUAL_TYPE (i); /* OK */ | |
bb425013 AC |
182 | } |
183 | ||
184 | /* If an old style architecture, fill in the remainder of the | |
185 | register cache descriptor using the register macros. */ | |
186 | if (!gdbarch_pseudo_register_read_p (gdbarch) | |
35cac7cf AC |
187 | && !gdbarch_pseudo_register_write_p (gdbarch) |
188 | && !gdbarch_register_type_p (gdbarch)) | |
bb425013 | 189 | { |
46654a5b AC |
190 | /* NOTE: cagney/2003-05-02: Don't add a test for REGISTER_BYTE_P |
191 | to the above. Doing that would cause all the existing | |
192 | architectures to revert back to the legacy regcache | |
193 | mechanisms, and that is not a good thing. Instead just, | |
194 | later, check that the register cache's layout is consistent | |
195 | with REGISTER_BYTE. */ | |
bb425013 AC |
196 | descr->legacy_p = 1; |
197 | init_legacy_regcache_descr (gdbarch, descr); | |
198 | return descr; | |
199 | } | |
200 | ||
3fadccb3 AC |
201 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
202 | into the register cache. */ | |
203 | descr->nr_raw_registers = NUM_REGS; | |
53826de9 AC |
204 | |
205 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p | |
206 | array. This pretects GDB from erant code that accesses elements | |
207 | of the global register_valid_p[] array in the range [NUM_REGS | |
208 | .. NUM_REGS + NUM_PSEUDO_REGS). */ | |
067df2e5 | 209 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
3fadccb3 | 210 | |
067df2e5 | 211 | /* Lay out the register cache. |
3fadccb3 | 212 | |
bb425013 AC |
213 | NOTE: cagney/2002-05-22: Only register_type() is used when |
214 | constructing the register cache. It is assumed that the | |
215 | register's raw size, virtual size and type length are all the | |
216 | same. */ | |
3fadccb3 AC |
217 | |
218 | { | |
219 | long offset = 0; | |
d138e37a AC |
220 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
221 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
3fadccb3 | 222 | descr->max_register_size = 0; |
d138e37a | 223 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 224 | { |
bb425013 | 225 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
226 | descr->register_offset[i] = offset; |
227 | offset += descr->sizeof_register[i]; | |
228 | if (descr->max_register_size < descr->sizeof_register[i]) | |
229 | descr->max_register_size = descr->sizeof_register[i]; | |
230 | } | |
231 | /* Set the real size of the register cache buffer. */ | |
067df2e5 | 232 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
233 | } |
234 | ||
067df2e5 AC |
235 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
236 | the raw registers. Unfortunatly some code still accesses the | |
237 | register array directly using the global registers[]. Until that | |
238 | code has been purged, play safe and over allocating the register | |
239 | buffer. Ulgh! */ | |
240 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
241 | ||
46654a5b AC |
242 | /* Sanity check. Confirm that there is agreement between the |
243 | regcache and the target's redundant REGISTER_BYTE (new targets | |
244 | should not even be defining it). */ | |
d138e37a | 245 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 246 | { |
46654a5b AC |
247 | if (REGISTER_BYTE_P ()) |
248 | gdb_assert (descr->register_offset[i] == REGISTER_BYTE (i)); | |
249 | #if 0 | |
3fadccb3 AC |
250 | gdb_assert (descr->sizeof_register[i] == REGISTER_RAW_SIZE (i)); |
251 | gdb_assert (descr->sizeof_register[i] == REGISTER_VIRTUAL_SIZE (i)); | |
46654a5b | 252 | #endif |
3fadccb3 AC |
253 | } |
254 | /* gdb_assert (descr->sizeof_raw_registers == REGISTER_BYTES (i)); */ | |
3fadccb3 AC |
255 | |
256 | return descr; | |
257 | } | |
258 | ||
259 | static struct regcache_descr * | |
260 | regcache_descr (struct gdbarch *gdbarch) | |
261 | { | |
262 | return gdbarch_data (gdbarch, regcache_descr_handle); | |
263 | } | |
264 | ||
265 | static void | |
266 | xfree_regcache_descr (struct gdbarch *gdbarch, void *ptr) | |
267 | { | |
268 | struct regcache_descr *descr = ptr; | |
269 | if (descr == NULL) | |
270 | return; | |
271 | xfree (descr->register_offset); | |
272 | xfree (descr->sizeof_register); | |
273 | descr->register_offset = NULL; | |
274 | descr->sizeof_register = NULL; | |
275 | xfree (descr); | |
276 | } | |
277 | ||
bb425013 AC |
278 | /* Utility functions returning useful register attributes stored in |
279 | the regcache descr. */ | |
280 | ||
281 | struct type * | |
282 | register_type (struct gdbarch *gdbarch, int regnum) | |
283 | { | |
284 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
285 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
286 | return descr->register_type[regnum]; | |
287 | } | |
288 | ||
0ed04cce AC |
289 | /* Utility functions returning useful register attributes stored in |
290 | the regcache descr. */ | |
291 | ||
292 | int | |
293 | max_register_size (struct gdbarch *gdbarch) | |
294 | { | |
295 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
296 | return descr->max_register_size; | |
297 | } | |
298 | ||
a0ed5532 AC |
299 | int |
300 | legacy_max_register_raw_size (void) | |
301 | { | |
302 | if (DEPRECATED_MAX_REGISTER_RAW_SIZE_P ()) | |
303 | return DEPRECATED_MAX_REGISTER_RAW_SIZE; | |
304 | else | |
305 | return max_register_size (current_gdbarch); | |
306 | } | |
307 | ||
08a617da AC |
308 | int |
309 | register_size (struct gdbarch *gdbarch, int regnum) | |
310 | { | |
311 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
312 | int size; | |
313 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); | |
314 | size = descr->sizeof_register[regnum]; | |
315 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ | |
316 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ | |
317 | return size; | |
318 | } | |
319 | ||
3fadccb3 AC |
320 | /* The register cache for storing raw register values. */ |
321 | ||
322 | struct regcache | |
323 | { | |
324 | struct regcache_descr *descr; | |
51b1fe4e AC |
325 | /* The register buffers. A read-only register cache can hold the |
326 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write | |
327 | register cache can only hold [0 .. NUM_REGS). */ | |
328 | char *registers; | |
329 | char *register_valid_p; | |
2d28509a AC |
330 | /* Is this a read-only cache? A read-only cache is used for saving |
331 | the target's register state (e.g, across an inferior function | |
332 | call or just before forcing a function return). A read-only | |
333 | cache can only be updated via the methods regcache_dup() and | |
334 | regcache_cpy(). The actual contents are determined by the | |
335 | reggroup_save and reggroup_restore methods. */ | |
336 | int readonly_p; | |
3fadccb3 AC |
337 | }; |
338 | ||
339 | struct regcache * | |
340 | regcache_xmalloc (struct gdbarch *gdbarch) | |
341 | { | |
342 | struct regcache_descr *descr; | |
343 | struct regcache *regcache; | |
344 | gdb_assert (gdbarch != NULL); | |
345 | descr = regcache_descr (gdbarch); | |
346 | regcache = XMALLOC (struct regcache); | |
347 | regcache->descr = descr; | |
51b1fe4e | 348 | regcache->registers |
3fadccb3 | 349 | = XCALLOC (descr->sizeof_raw_registers, char); |
51b1fe4e | 350 | regcache->register_valid_p |
3fadccb3 | 351 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
2d28509a | 352 | regcache->readonly_p = 1; |
3fadccb3 AC |
353 | return regcache; |
354 | } | |
355 | ||
356 | void | |
357 | regcache_xfree (struct regcache *regcache) | |
358 | { | |
359 | if (regcache == NULL) | |
360 | return; | |
51b1fe4e AC |
361 | xfree (regcache->registers); |
362 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
363 | xfree (regcache); |
364 | } | |
365 | ||
36160dc4 AC |
366 | void |
367 | do_regcache_xfree (void *data) | |
368 | { | |
369 | regcache_xfree (data); | |
370 | } | |
371 | ||
372 | struct cleanup * | |
373 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
374 | { | |
375 | return make_cleanup (do_regcache_xfree, regcache); | |
376 | } | |
377 | ||
51b1fe4e AC |
378 | /* Return a pointer to register REGNUM's buffer cache. */ |
379 | ||
380 | static char * | |
381 | register_buffer (struct regcache *regcache, int regnum) | |
382 | { | |
383 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
384 | } | |
385 | ||
2d28509a | 386 | void |
5602984a AC |
387 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
388 | void *src) | |
2d28509a AC |
389 | { |
390 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
5602984a | 391 | void *buf = alloca (max_register_size (gdbarch)); |
2d28509a | 392 | int regnum; |
2d28509a | 393 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 394 | end up trying to write the register values back out to the |
2d28509a | 395 | target. */ |
2d28509a AC |
396 | gdb_assert (dst->readonly_p); |
397 | /* Clear the dest. */ | |
398 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
399 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); | |
400 | /* Copy over any registers (identified by their membership in the | |
5602984a AC |
401 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
402 | NUM_PSEUDO_REGS) range is checked since some architectures need | |
403 | to save/restore `cooked' registers that live in memory. */ | |
2d28509a AC |
404 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
405 | { | |
406 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
407 | { | |
5602984a AC |
408 | int valid = cooked_read (src, regnum, buf); |
409 | if (valid) | |
410 | { | |
411 | memcpy (register_buffer (dst, regnum), buf, | |
412 | register_size (gdbarch, regnum)); | |
413 | dst->register_valid_p[regnum] = 1; | |
414 | } | |
2d28509a AC |
415 | } |
416 | } | |
417 | } | |
418 | ||
419 | void | |
5602984a AC |
420 | regcache_restore (struct regcache *dst, |
421 | regcache_cooked_read_ftype *cooked_read, | |
422 | void *src) | |
2d28509a AC |
423 | { |
424 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
5602984a | 425 | void *buf = alloca (max_register_size (gdbarch)); |
2d28509a | 426 | int regnum; |
5602984a AC |
427 | /* The dst had better not be read-only. If it is, the `restore' |
428 | doesn't make much sense. */ | |
2d28509a | 429 | gdb_assert (!dst->readonly_p); |
2d28509a | 430 | /* Copy over any registers, being careful to only restore those that |
5602984a AC |
431 | were both saved and need to be restored. The full [0 .. NUM_REGS |
432 | + NUM_PSEUDO_REGS) range is checked since some architectures need | |
433 | to save/restore `cooked' registers that live in memory. */ | |
434 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 435 | { |
5602984a | 436 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 437 | { |
5602984a AC |
438 | int valid = cooked_read (src, regnum, buf); |
439 | if (valid) | |
440 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
441 | } |
442 | } | |
443 | } | |
444 | ||
5602984a AC |
445 | static int |
446 | do_cooked_read (void *src, int regnum, void *buf) | |
447 | { | |
448 | struct regcache *regcache = src; | |
449 | if (!regcache_valid_p (regcache, regnum) | |
450 | && regcache->readonly_p) | |
451 | /* Don't even think about fetching a register from a read-only | |
452 | cache when the register isn't yet valid. There isn't a target | |
453 | from which the register value can be fetched. */ | |
454 | return 0; | |
455 | regcache_cooked_read (regcache, regnum, buf); | |
456 | return 1; | |
457 | } | |
458 | ||
459 | ||
3fadccb3 AC |
460 | void |
461 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
462 | { | |
463 | int i; | |
464 | char *buf; | |
465 | gdb_assert (src != NULL && dst != NULL); | |
466 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
467 | gdb_assert (src != dst); | |
2d28509a AC |
468 | gdb_assert (src->readonly_p || dst->readonly_p); |
469 | if (!src->readonly_p) | |
5602984a | 470 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 471 | else if (!dst->readonly_p) |
5602984a | 472 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
473 | else |
474 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
475 | } |
476 | ||
477 | void | |
478 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
479 | { | |
480 | int i; | |
481 | gdb_assert (src != NULL && dst != NULL); | |
482 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
483 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
484 | move of data into the current_regcache(). Doing this would be | |
485 | silly - it would mean that valid_p would be completly invalid. */ | |
486 | gdb_assert (dst != current_regcache); | |
51b1fe4e AC |
487 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
488 | memcpy (dst->register_valid_p, src->register_valid_p, | |
3fadccb3 AC |
489 | dst->descr->sizeof_raw_register_valid_p); |
490 | } | |
491 | ||
492 | struct regcache * | |
493 | regcache_dup (struct regcache *src) | |
494 | { | |
495 | struct regcache *newbuf; | |
496 | gdb_assert (current_regcache != NULL); | |
497 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
498 | regcache_cpy (newbuf, src); | |
499 | return newbuf; | |
500 | } | |
501 | ||
502 | struct regcache * | |
503 | regcache_dup_no_passthrough (struct regcache *src) | |
504 | { | |
505 | struct regcache *newbuf; | |
506 | gdb_assert (current_regcache != NULL); | |
507 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
508 | regcache_cpy_no_passthrough (newbuf, src); | |
509 | return newbuf; | |
510 | } | |
511 | ||
512 | int | |
513 | regcache_valid_p (struct regcache *regcache, int regnum) | |
514 | { | |
515 | gdb_assert (regcache != NULL); | |
516 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
51b1fe4e | 517 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
518 | } |
519 | ||
3fadccb3 AC |
520 | char * |
521 | deprecated_grub_regcache_for_registers (struct regcache *regcache) | |
522 | { | |
51b1fe4e | 523 | return regcache->registers; |
3fadccb3 AC |
524 | } |
525 | ||
526 | char * | |
527 | deprecated_grub_regcache_for_register_valid (struct regcache *regcache) | |
528 | { | |
51b1fe4e | 529 | return regcache->register_valid_p; |
3fadccb3 AC |
530 | } |
531 | ||
532 | /* Global structure containing the current regcache. */ | |
533 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and | |
8262ee23 | 534 | deprecated_register_valid[] currently point into this structure. */ |
3fadccb3 AC |
535 | struct regcache *current_regcache; |
536 | ||
5ebd2499 | 537 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
538 | recording if the register values have been changed (eg. by the |
539 | user). Therefore all registers must be written back to the | |
540 | target when appropriate. */ | |
541 | ||
542 | /* REGISTERS contains the cached register values (in target byte order). */ | |
543 | ||
524d7c18 | 544 | char *deprecated_registers; |
32178cab | 545 | |
8262ee23 | 546 | /* DEPRECATED_REGISTER_VALID is 0 if the register needs to be fetched, |
32178cab MS |
547 | 1 if it has been fetched, and |
548 | -1 if the register value was not available. | |
c97dcfc7 AC |
549 | |
550 | "Not available" indicates that the target is not not able to supply | |
551 | the register at this state. The register may become available at a | |
552 | later time (after the next resume). This often occures when GDB is | |
553 | manipulating a target that contains only a snapshot of the entire | |
554 | system being debugged - some of the registers in such a system may | |
555 | not have been saved. */ | |
32178cab | 556 | |
8262ee23 | 557 | signed char *deprecated_register_valid; |
32178cab | 558 | |
39f77062 | 559 | /* The thread/process associated with the current set of registers. */ |
32178cab | 560 | |
39f77062 | 561 | static ptid_t registers_ptid; |
32178cab MS |
562 | |
563 | /* | |
564 | * FUNCTIONS: | |
565 | */ | |
566 | ||
567 | /* REGISTER_CACHED() | |
568 | ||
569 | Returns 0 if the value is not in the cache (needs fetch). | |
570 | >0 if the value is in the cache. | |
571 | <0 if the value is permanently unavailable (don't ask again). */ | |
572 | ||
573 | int | |
574 | register_cached (int regnum) | |
575 | { | |
8262ee23 | 576 | return deprecated_register_valid[regnum]; |
32178cab MS |
577 | } |
578 | ||
7302a204 ND |
579 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
580 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ | |
581 | ||
582 | void | |
583 | set_register_cached (int regnum, int state) | |
584 | { | |
53826de9 AC |
585 | gdb_assert (regnum >= 0); |
586 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); | |
51b1fe4e | 587 | current_regcache->register_valid_p[regnum] = state; |
7302a204 ND |
588 | } |
589 | ||
590 | /* Return whether register REGNUM is a real register. */ | |
591 | ||
592 | static int | |
593 | real_register (int regnum) | |
594 | { | |
595 | return regnum >= 0 && regnum < NUM_REGS; | |
596 | } | |
597 | ||
32178cab MS |
598 | /* Low level examining and depositing of registers. |
599 | ||
600 | The caller is responsible for making sure that the inferior is | |
601 | stopped before calling the fetching routines, or it will get | |
602 | garbage. (a change from GDB version 3, in which the caller got the | |
603 | value from the last stop). */ | |
604 | ||
605 | /* REGISTERS_CHANGED () | |
606 | ||
607 | Indicate that registers may have changed, so invalidate the cache. */ | |
608 | ||
609 | void | |
610 | registers_changed (void) | |
611 | { | |
612 | int i; | |
32178cab | 613 | |
39f77062 | 614 | registers_ptid = pid_to_ptid (-1); |
32178cab MS |
615 | |
616 | /* Force cleanup of any alloca areas if using C alloca instead of | |
617 | a builtin alloca. This particular call is used to clean up | |
618 | areas allocated by low level target code which may build up | |
619 | during lengthy interactions between gdb and the target before | |
620 | gdb gives control to the user (ie watchpoints). */ | |
621 | alloca (0); | |
622 | ||
53826de9 | 623 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
7302a204 | 624 | set_register_cached (i, 0); |
32178cab MS |
625 | |
626 | if (registers_changed_hook) | |
627 | registers_changed_hook (); | |
628 | } | |
629 | ||
2b9e5f3f | 630 | /* DEPRECATED_REGISTERS_FETCHED () |
32178cab MS |
631 | |
632 | Indicate that all registers have been fetched, so mark them all valid. */ | |
633 | ||
31e9866e AC |
634 | /* NOTE: cagney/2001-12-04: This function does not set valid on the |
635 | pseudo-register range since pseudo registers are always supplied | |
636 | using supply_register(). */ | |
637 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target | |
638 | code was blatting the registers[] array and then calling this. | |
639 | Since targets should only be using supply_register() the need for | |
640 | this function/hack is eliminated. */ | |
32178cab MS |
641 | |
642 | void | |
2b9e5f3f | 643 | deprecated_registers_fetched (void) |
32178cab MS |
644 | { |
645 | int i; | |
32178cab | 646 | |
a728f042 | 647 | for (i = 0; i < NUM_REGS; i++) |
7302a204 | 648 | set_register_cached (i, 1); |
fcdc5976 | 649 | /* Do not assume that the pseudo-regs have also been fetched. |
31e9866e | 650 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
32178cab MS |
651 | } |
652 | ||
73937e03 AC |
653 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
654 | are generally a *BAD* idea. They are inefficient because they need | |
655 | to check for partial updates, which can only be done by scanning | |
656 | through all of the registers and seeing if the bytes that are being | |
657 | read/written fall inside of an invalid register. [The main reason | |
658 | this is necessary is that register sizes can vary, so a simple | |
659 | index won't suffice.] It is far better to call read_register_gen | |
660 | and write_register_gen if you want to get at the raw register | |
661 | contents, as it only takes a regnum as an argument, and therefore | |
662 | can't do a partial register update. | |
32178cab MS |
663 | |
664 | Prior to the recent fixes to check for partial updates, both read | |
73937e03 AC |
665 | and deprecated_write_register_bytes always checked to see if any |
666 | registers were stale, and then called target_fetch_registers (-1) | |
667 | to update the whole set. This caused really slowed things down for | |
668 | remote targets. */ | |
32178cab MS |
669 | |
670 | /* Copy INLEN bytes of consecutive data from registers | |
671 | starting with the INREGBYTE'th byte of register data | |
672 | into memory at MYADDR. */ | |
673 | ||
674 | void | |
73937e03 | 675 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
32178cab | 676 | { |
61a0eb5b | 677 | int in_end = in_start + in_len; |
5ebd2499 | 678 | int regnum; |
61a0eb5b | 679 | char *reg_buf = alloca (MAX_REGISTER_RAW_SIZE); |
32178cab MS |
680 | |
681 | /* See if we are trying to read bytes from out-of-date registers. If so, | |
682 | update just those registers. */ | |
683 | ||
5ebd2499 | 684 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab | 685 | { |
61a0eb5b AC |
686 | int reg_start; |
687 | int reg_end; | |
688 | int reg_len; | |
689 | int start; | |
690 | int end; | |
691 | int byte; | |
32178cab | 692 | |
61a0eb5b AC |
693 | reg_start = REGISTER_BYTE (regnum); |
694 | reg_len = REGISTER_RAW_SIZE (regnum); | |
695 | reg_end = reg_start + reg_len; | |
32178cab | 696 | |
61a0eb5b | 697 | if (reg_end <= in_start || in_end <= reg_start) |
5ebd2499 | 698 | /* The range the user wants to read doesn't overlap with regnum. */ |
32178cab MS |
699 | continue; |
700 | ||
275f450c AC |
701 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
702 | /* Force the cache to fetch the entire register. */ | |
4caf0990 | 703 | deprecated_read_register_gen (regnum, reg_buf); |
275f450c AC |
704 | else |
705 | /* Legacy note: even though this register is ``invalid'' we | |
706 | still need to return something. It would appear that some | |
707 | code relies on apparent gaps in the register array also | |
708 | being returned. */ | |
709 | /* FIXME: cagney/2001-08-18: This is just silly. It defeats | |
710 | the entire register read/write flow of control. Must | |
711 | resist temptation to return 0xdeadbeef. */ | |
524d7c18 | 712 | memcpy (reg_buf, &deprecated_registers[reg_start], reg_len); |
32178cab | 713 | |
61a0eb5b AC |
714 | /* Legacy note: This function, for some reason, allows a NULL |
715 | input buffer. If the buffer is NULL, the registers are still | |
716 | fetched, just the final transfer is skipped. */ | |
717 | if (in_buf == NULL) | |
718 | continue; | |
719 | ||
720 | /* start = max (reg_start, in_start) */ | |
721 | if (reg_start > in_start) | |
722 | start = reg_start; | |
723 | else | |
724 | start = in_start; | |
725 | ||
726 | /* end = min (reg_end, in_end) */ | |
727 | if (reg_end < in_end) | |
728 | end = reg_end; | |
729 | else | |
730 | end = in_end; | |
731 | ||
732 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ | |
733 | for (byte = start; byte < end; byte++) | |
165cd47f | 734 | { |
61a0eb5b | 735 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
165cd47f | 736 | } |
32178cab | 737 | } |
32178cab MS |
738 | } |
739 | ||
5ebd2499 ND |
740 | /* Read register REGNUM into memory at MYADDR, which must be large |
741 | enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the | |
32178cab MS |
742 | register is known to be the size of a CORE_ADDR or smaller, |
743 | read_register can be used instead. */ | |
744 | ||
61a0eb5b AC |
745 | static void |
746 | legacy_read_register_gen (int regnum, char *myaddr) | |
32178cab | 747 | { |
61a0eb5b | 748 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
39f77062 | 749 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
750 | { |
751 | registers_changed (); | |
39f77062 | 752 | registers_ptid = inferior_ptid; |
32178cab MS |
753 | } |
754 | ||
7302a204 | 755 | if (!register_cached (regnum)) |
5c27f28a | 756 | target_fetch_registers (regnum); |
7302a204 | 757 | |
3fadccb3 | 758 | memcpy (myaddr, register_buffer (current_regcache, regnum), |
5ebd2499 | 759 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
760 | } |
761 | ||
61a0eb5b | 762 | void |
1aaa5f99 | 763 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
61a0eb5b | 764 | { |
3fadccb3 AC |
765 | gdb_assert (regcache != NULL && buf != NULL); |
766 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
767 | if (regcache->descr->legacy_p | |
2d28509a | 768 | && !regcache->readonly_p) |
3fadccb3 AC |
769 | { |
770 | gdb_assert (regcache == current_regcache); | |
771 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
772 | silently and very indirectly updates the regcache's regcache | |
8262ee23 | 773 | via the global deprecated_register_valid[]. */ |
3fadccb3 AC |
774 | legacy_read_register_gen (regnum, buf); |
775 | return; | |
776 | } | |
777 | /* Make certain that the register cache is up-to-date with respect | |
778 | to the current thread. This switching shouldn't be necessary | |
779 | only there is still only one target side register cache. Sigh! | |
780 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 781 | if (!regcache->readonly_p) |
3fadccb3 AC |
782 | { |
783 | gdb_assert (regcache == current_regcache); | |
784 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
785 | { | |
786 | registers_changed (); | |
787 | registers_ptid = inferior_ptid; | |
788 | } | |
789 | if (!register_cached (regnum)) | |
5c27f28a | 790 | target_fetch_registers (regnum); |
3fadccb3 AC |
791 | } |
792 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 793 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 794 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
795 | } |
796 | ||
28fc6740 AC |
797 | void |
798 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
799 | { | |
800 | char *buf; | |
801 | gdb_assert (regcache != NULL); | |
802 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
803 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
804 | regcache_raw_read (regcache, regnum, buf); | |
805 | (*val) = extract_signed_integer (buf, | |
806 | regcache->descr->sizeof_register[regnum]); | |
807 | } | |
808 | ||
809 | void | |
810 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
811 | ULONGEST *val) | |
812 | { | |
813 | char *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 | regcache_raw_read (regcache, regnum, buf); | |
818 | (*val) = extract_unsigned_integer (buf, | |
819 | regcache->descr->sizeof_register[regnum]); | |
820 | } | |
821 | ||
c00dcbe9 MK |
822 | void |
823 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
824 | { | |
825 | void *buf; | |
826 | gdb_assert (regcache != NULL); | |
827 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
828 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
829 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
830 | regcache_raw_write (regcache, regnum, buf); | |
831 | } | |
832 | ||
833 | void | |
834 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
835 | ULONGEST val) | |
836 | { | |
837 | void *buf; | |
838 | gdb_assert (regcache != NULL); | |
839 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
840 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
841 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
842 | regcache_raw_write (regcache, regnum, buf); | |
843 | } | |
844 | ||
61a0eb5b | 845 | void |
4caf0990 | 846 | deprecated_read_register_gen (int regnum, char *buf) |
61a0eb5b | 847 | { |
3fadccb3 AC |
848 | gdb_assert (current_regcache != NULL); |
849 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
850 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
851 | { |
852 | legacy_read_register_gen (regnum, buf); | |
853 | return; | |
854 | } | |
68365089 AC |
855 | regcache_cooked_read (current_regcache, regnum, buf); |
856 | } | |
857 | ||
858 | void | |
29e1842b | 859 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
68365089 | 860 | { |
d138e37a | 861 | gdb_assert (regnum >= 0); |
68365089 AC |
862 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
863 | if (regnum < regcache->descr->nr_raw_registers) | |
864 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
865 | else if (regcache->readonly_p |
866 | && regnum < regcache->descr->nr_cooked_registers | |
867 | && regcache->register_valid_p[regnum]) | |
868 | /* Read-only register cache, perhaphs the cooked value was cached? */ | |
869 | memcpy (buf, register_buffer (regcache, regnum), | |
870 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 871 | else |
68365089 AC |
872 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
873 | regnum, buf); | |
61a0eb5b AC |
874 | } |
875 | ||
a378f419 AC |
876 | void |
877 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
878 | LONGEST *val) | |
879 | { | |
880 | char *buf; | |
881 | gdb_assert (regcache != NULL); | |
a66a9c23 | 882 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
883 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
884 | regcache_cooked_read (regcache, regnum, buf); | |
885 | (*val) = extract_signed_integer (buf, | |
886 | regcache->descr->sizeof_register[regnum]); | |
887 | } | |
888 | ||
889 | void | |
890 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
891 | ULONGEST *val) | |
892 | { | |
893 | char *buf; | |
894 | gdb_assert (regcache != NULL); | |
a66a9c23 | 895 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
896 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
897 | regcache_cooked_read (regcache, regnum, buf); | |
898 | (*val) = extract_unsigned_integer (buf, | |
899 | regcache->descr->sizeof_register[regnum]); | |
900 | } | |
901 | ||
a66a9c23 AC |
902 | void |
903 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
904 | LONGEST val) | |
905 | { | |
906 | void *buf; | |
907 | gdb_assert (regcache != NULL); | |
908 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
909 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
910 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
911 | regcache_cooked_write (regcache, regnum, buf); | |
912 | } | |
913 | ||
914 | void | |
915 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
916 | ULONGEST val) | |
917 | { | |
918 | void *buf; | |
919 | gdb_assert (regcache != NULL); | |
920 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
921 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
922 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
923 | regcache_cooked_write (regcache, regnum, buf); | |
924 | } | |
925 | ||
5ebd2499 ND |
926 | /* Write register REGNUM at MYADDR to the target. MYADDR points at |
927 | REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */ | |
32178cab | 928 | |
61a0eb5b | 929 | static void |
1aaa5f99 | 930 | legacy_write_register_gen (int regnum, const void *myaddr) |
32178cab MS |
931 | { |
932 | int size; | |
61a0eb5b | 933 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
32178cab MS |
934 | |
935 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
936 | change the registers array if something writes to this register. */ | |
5ebd2499 | 937 | if (CANNOT_STORE_REGISTER (regnum)) |
32178cab MS |
938 | return; |
939 | ||
39f77062 | 940 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
941 | { |
942 | registers_changed (); | |
39f77062 | 943 | registers_ptid = inferior_ptid; |
32178cab MS |
944 | } |
945 | ||
5ebd2499 | 946 | size = REGISTER_RAW_SIZE (regnum); |
32178cab | 947 | |
7302a204 | 948 | if (real_register (regnum)) |
1297a2f0 MS |
949 | { |
950 | /* If we have a valid copy of the register, and new value == old | |
951 | value, then don't bother doing the actual store. */ | |
952 | if (register_cached (regnum) | |
3fadccb3 AC |
953 | && (memcmp (register_buffer (current_regcache, regnum), myaddr, size) |
954 | == 0)) | |
1297a2f0 MS |
955 | return; |
956 | else | |
957 | target_prepare_to_store (); | |
958 | } | |
32178cab | 959 | |
3fadccb3 | 960 | memcpy (register_buffer (current_regcache, regnum), myaddr, size); |
32178cab | 961 | |
7302a204 | 962 | set_register_cached (regnum, 1); |
5c27f28a | 963 | target_store_registers (regnum); |
32178cab MS |
964 | } |
965 | ||
61a0eb5b | 966 | void |
1aaa5f99 | 967 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
61a0eb5b | 968 | { |
3fadccb3 AC |
969 | gdb_assert (regcache != NULL && buf != NULL); |
970 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 971 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 972 | |
2d28509a | 973 | if (regcache->descr->legacy_p) |
3fadccb3 AC |
974 | { |
975 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
976 | silently and very indirectly updates the regcache's buffers | |
8262ee23 | 977 | via the globals deprecated_register_valid[] and registers[]. */ |
3fadccb3 AC |
978 | gdb_assert (regcache == current_regcache); |
979 | legacy_write_register_gen (regnum, buf); | |
980 | return; | |
981 | } | |
982 | ||
983 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
984 | change the registers array if something writes to this register. */ | |
985 | if (CANNOT_STORE_REGISTER (regnum)) | |
986 | return; | |
987 | ||
3fadccb3 AC |
988 | /* Make certain that the correct cache is selected. */ |
989 | gdb_assert (regcache == current_regcache); | |
990 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
991 | { | |
992 | registers_changed (); | |
993 | registers_ptid = inferior_ptid; | |
994 | } | |
995 | ||
996 | /* If we have a valid copy of the register, and new value == old | |
997 | value, then don't bother doing the actual store. */ | |
998 | if (regcache_valid_p (regcache, regnum) | |
999 | && (memcmp (register_buffer (regcache, regnum), buf, | |
1000 | regcache->descr->sizeof_register[regnum]) == 0)) | |
1001 | return; | |
1002 | ||
1003 | target_prepare_to_store (); | |
1004 | memcpy (register_buffer (regcache, regnum), buf, | |
1005 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 1006 | regcache->register_valid_p[regnum] = 1; |
5c27f28a | 1007 | target_store_registers (regnum); |
61a0eb5b AC |
1008 | } |
1009 | ||
1010 | void | |
4caf0990 | 1011 | deprecated_write_register_gen (int regnum, char *buf) |
61a0eb5b | 1012 | { |
3fadccb3 AC |
1013 | gdb_assert (current_regcache != NULL); |
1014 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
1015 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
1016 | { |
1017 | legacy_write_register_gen (regnum, buf); | |
1018 | return; | |
1019 | } | |
68365089 AC |
1020 | regcache_cooked_write (current_regcache, regnum, buf); |
1021 | } | |
1022 | ||
1023 | void | |
29e1842b | 1024 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
68365089 | 1025 | { |
d138e37a | 1026 | gdb_assert (regnum >= 0); |
68365089 AC |
1027 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
1028 | if (regnum < regcache->descr->nr_raw_registers) | |
1029 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 1030 | else |
68365089 | 1031 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 1032 | regnum, buf); |
61a0eb5b AC |
1033 | } |
1034 | ||
32178cab MS |
1035 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
1036 | into registers starting with the MYREGSTART'th byte of register data. */ | |
1037 | ||
1038 | void | |
73937e03 | 1039 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
32178cab MS |
1040 | { |
1041 | int myregend = myregstart + inlen; | |
5ebd2499 | 1042 | int regnum; |
32178cab MS |
1043 | |
1044 | target_prepare_to_store (); | |
1045 | ||
1046 | /* Scan through the registers updating any that are covered by the | |
1047 | range myregstart<=>myregend using write_register_gen, which does | |
1048 | nice things like handling threads, and avoiding updates when the | |
1049 | new and old contents are the same. */ | |
1050 | ||
5ebd2499 | 1051 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab MS |
1052 | { |
1053 | int regstart, regend; | |
1054 | ||
5ebd2499 ND |
1055 | regstart = REGISTER_BYTE (regnum); |
1056 | regend = regstart + REGISTER_RAW_SIZE (regnum); | |
32178cab MS |
1057 | |
1058 | /* Is this register completely outside the range the user is writing? */ | |
1059 | if (myregend <= regstart || regend <= myregstart) | |
1060 | /* do nothing */ ; | |
1061 | ||
1062 | /* Is this register completely within the range the user is writing? */ | |
1063 | else if (myregstart <= regstart && regend <= myregend) | |
4caf0990 | 1064 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
32178cab MS |
1065 | |
1066 | /* The register partially overlaps the range being written. */ | |
1067 | else | |
1068 | { | |
e6cbd02a | 1069 | char *regbuf = (char*) alloca (MAX_REGISTER_RAW_SIZE); |
32178cab MS |
1070 | /* What's the overlap between this register's bytes and |
1071 | those the caller wants to write? */ | |
1072 | int overlapstart = max (regstart, myregstart); | |
1073 | int overlapend = min (regend, myregend); | |
1074 | ||
1075 | /* We may be doing a partial update of an invalid register. | |
1076 | Update it from the target before scribbling on it. */ | |
4caf0990 | 1077 | deprecated_read_register_gen (regnum, regbuf); |
32178cab | 1078 | |
524d7c18 | 1079 | memcpy (&deprecated_registers[overlapstart], |
32178cab MS |
1080 | myaddr + (overlapstart - myregstart), |
1081 | overlapend - overlapstart); | |
1082 | ||
5c27f28a | 1083 | target_store_registers (regnum); |
32178cab MS |
1084 | } |
1085 | } | |
1086 | } | |
1087 | ||
06c0b04e AC |
1088 | /* Perform a partial register transfer using a read, modify, write |
1089 | operation. */ | |
1090 | ||
1091 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
1092 | void *buf); | |
1093 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
1094 | const void *buf); | |
1095 | ||
1096 | void | |
1097 | regcache_xfer_part (struct regcache *regcache, int regnum, | |
1098 | int offset, int len, void *in, const void *out, | |
1099 | regcache_read_ftype *read, regcache_write_ftype *write) | |
1100 | { | |
1101 | struct regcache_descr *descr = regcache->descr; | |
1102 | bfd_byte *reg = alloca (descr->max_register_size); | |
1103 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); | |
1104 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
1105 | /* Something to do? */ | |
1106 | if (offset + len == 0) | |
1107 | return; | |
1108 | /* Read (when needed) ... */ | |
1109 | if (in != NULL | |
1110 | || offset > 0 | |
1111 | || offset + len < descr->sizeof_register[regnum]) | |
1112 | { | |
1113 | gdb_assert (read != NULL); | |
1114 | read (regcache, regnum, reg); | |
1115 | } | |
1116 | /* ... modify ... */ | |
1117 | if (in != NULL) | |
1118 | memcpy (in, reg + offset, len); | |
1119 | if (out != NULL) | |
1120 | memcpy (reg + offset, out, len); | |
1121 | /* ... write (when needed). */ | |
1122 | if (out != NULL) | |
1123 | { | |
1124 | gdb_assert (write != NULL); | |
1125 | write (regcache, regnum, reg); | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | void | |
1130 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
1131 | int offset, int len, void *buf) | |
1132 | { | |
1133 | struct regcache_descr *descr = regcache->descr; | |
1134 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1135 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1136 | regcache_raw_read, regcache_raw_write); | |
1137 | } | |
1138 | ||
1139 | void | |
1140 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
1141 | int offset, int len, const void *buf) | |
1142 | { | |
1143 | struct regcache_descr *descr = regcache->descr; | |
1144 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1145 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1146 | regcache_raw_read, regcache_raw_write); | |
1147 | } | |
1148 | ||
1149 | void | |
1150 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
1151 | int offset, int len, void *buf) | |
1152 | { | |
1153 | struct regcache_descr *descr = regcache->descr; | |
1154 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1155 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1156 | regcache_cooked_read, regcache_cooked_write); | |
1157 | } | |
1158 | ||
1159 | void | |
1160 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
1161 | int offset, int len, const void *buf) | |
1162 | { | |
1163 | struct regcache_descr *descr = regcache->descr; | |
1164 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1165 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1166 | regcache_cooked_read, regcache_cooked_write); | |
1167 | } | |
32178cab | 1168 | |
d3b22ed5 AC |
1169 | /* Hack to keep code that view the register buffer as raw bytes |
1170 | working. */ | |
1171 | ||
1172 | int | |
1173 | register_offset_hack (struct gdbarch *gdbarch, int regnum) | |
1174 | { | |
1175 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
1176 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1177 | return descr->register_offset[regnum]; | |
1178 | } | |
1179 | ||
5ebd2499 | 1180 | /* Return the contents of register REGNUM as an unsigned integer. */ |
32178cab | 1181 | |
173155e8 | 1182 | ULONGEST |
5ebd2499 | 1183 | read_register (int regnum) |
32178cab | 1184 | { |
61a0eb5b | 1185 | char *buf = alloca (REGISTER_RAW_SIZE (regnum)); |
4caf0990 | 1186 | deprecated_read_register_gen (regnum, buf); |
61a0eb5b | 1187 | return (extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum))); |
32178cab MS |
1188 | } |
1189 | ||
173155e8 | 1190 | ULONGEST |
39f77062 | 1191 | read_register_pid (int regnum, ptid_t ptid) |
32178cab | 1192 | { |
39f77062 | 1193 | ptid_t save_ptid; |
32178cab MS |
1194 | int save_pid; |
1195 | CORE_ADDR retval; | |
1196 | ||
39f77062 | 1197 | if (ptid_equal (ptid, inferior_ptid)) |
5ebd2499 | 1198 | return read_register (regnum); |
32178cab | 1199 | |
39f77062 | 1200 | save_ptid = inferior_ptid; |
32178cab | 1201 | |
39f77062 | 1202 | inferior_ptid = ptid; |
32178cab | 1203 | |
5ebd2499 | 1204 | retval = read_register (regnum); |
32178cab | 1205 | |
39f77062 | 1206 | inferior_ptid = save_ptid; |
32178cab MS |
1207 | |
1208 | return retval; | |
1209 | } | |
1210 | ||
5ebd2499 | 1211 | /* Store VALUE into the raw contents of register number REGNUM. */ |
32178cab MS |
1212 | |
1213 | void | |
5ebd2499 | 1214 | write_register (int regnum, LONGEST val) |
32178cab | 1215 | { |
61a0eb5b | 1216 | void *buf; |
32178cab | 1217 | int size; |
5ebd2499 | 1218 | size = REGISTER_RAW_SIZE (regnum); |
32178cab MS |
1219 | buf = alloca (size); |
1220 | store_signed_integer (buf, size, (LONGEST) val); | |
4caf0990 | 1221 | deprecated_write_register_gen (regnum, buf); |
32178cab MS |
1222 | } |
1223 | ||
1224 | void | |
39f77062 | 1225 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
32178cab | 1226 | { |
39f77062 | 1227 | ptid_t save_ptid; |
32178cab | 1228 | |
39f77062 | 1229 | if (ptid_equal (ptid, inferior_ptid)) |
32178cab | 1230 | { |
5ebd2499 | 1231 | write_register (regnum, val); |
32178cab MS |
1232 | return; |
1233 | } | |
1234 | ||
39f77062 | 1235 | save_ptid = inferior_ptid; |
32178cab | 1236 | |
39f77062 | 1237 | inferior_ptid = ptid; |
32178cab | 1238 | |
5ebd2499 | 1239 | write_register (regnum, val); |
32178cab | 1240 | |
39f77062 | 1241 | inferior_ptid = save_ptid; |
32178cab MS |
1242 | } |
1243 | ||
1244 | /* SUPPLY_REGISTER() | |
1245 | ||
5ebd2499 | 1246 | Record that register REGNUM contains VAL. This is used when the |
32178cab MS |
1247 | value is obtained from the inferior or core dump, so there is no |
1248 | need to store the value there. | |
1249 | ||
1250 | If VAL is a NULL pointer, then it's probably an unsupported register. | |
5ebd2499 | 1251 | We just set its value to all zeros. We might want to record this |
32178cab MS |
1252 | fact, and report it to the users of read_register and friends. */ |
1253 | ||
1254 | void | |
1aaa5f99 | 1255 | supply_register (int regnum, const void *val) |
32178cab MS |
1256 | { |
1257 | #if 1 | |
39f77062 | 1258 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
1259 | { |
1260 | registers_changed (); | |
39f77062 | 1261 | registers_ptid = inferior_ptid; |
32178cab MS |
1262 | } |
1263 | #endif | |
1264 | ||
7302a204 | 1265 | set_register_cached (regnum, 1); |
32178cab | 1266 | if (val) |
3fadccb3 | 1267 | memcpy (register_buffer (current_regcache, regnum), val, |
5ebd2499 | 1268 | REGISTER_RAW_SIZE (regnum)); |
32178cab | 1269 | else |
3fadccb3 | 1270 | memset (register_buffer (current_regcache, regnum), '\000', |
5ebd2499 | 1271 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
1272 | |
1273 | /* On some architectures, e.g. HPPA, there are a few stray bits in | |
1274 | some registers, that the rest of the code would like to ignore. */ | |
1275 | ||
61a0eb5b AC |
1276 | /* NOTE: cagney/2001-03-16: The macro CLEAN_UP_REGISTER_VALUE is |
1277 | going to be deprecated. Instead architectures will leave the raw | |
1278 | register value as is and instead clean things up as they pass | |
d8124050 | 1279 | through the method gdbarch_pseudo_register_read() clean up the |
61a0eb5b AC |
1280 | values. */ |
1281 | ||
4ee3352d | 1282 | #ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE |
0b434a00 AC |
1283 | DEPRECATED_CLEAN_UP_REGISTER_VALUE \ |
1284 | (regnum, register_buffer (current_regcache, regnum)); | |
32178cab MS |
1285 | #endif |
1286 | } | |
1287 | ||
193cb69f AC |
1288 | void |
1289 | regcache_collect (int regnum, void *buf) | |
1290 | { | |
3fadccb3 AC |
1291 | memcpy (buf, register_buffer (current_regcache, regnum), |
1292 | REGISTER_RAW_SIZE (regnum)); | |
193cb69f AC |
1293 | } |
1294 | ||
1295 | ||
0ba6dca9 AC |
1296 | /* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special |
1297 | handling for registers PC, SP, and FP. */ | |
32178cab | 1298 | |
4e052eda AC |
1299 | /* NOTE: cagney/2001-02-18: The functions generic_target_read_pc(), |
1300 | read_pc_pid(), read_pc(), generic_target_write_pc(), | |
1301 | write_pc_pid(), write_pc(), generic_target_read_sp(), read_sp(), | |
0ba6dca9 AC |
1302 | generic_target_write_sp(), and deprecated_read_fp(), will |
1303 | eventually be moved out of the reg-cache into either frame.[hc] or | |
1304 | to the multi-arch framework. The are not part of the raw register | |
1305 | cache. */ | |
4e052eda | 1306 | |
32178cab MS |
1307 | /* This routine is getting awfully cluttered with #if's. It's probably |
1308 | time to turn this into READ_PC and define it in the tm.h file. | |
1309 | Ditto for write_pc. | |
1310 | ||
1311 | 1999-06-08: The following were re-written so that it assumes the | |
8e1a459b | 1312 | existence of a TARGET_READ_PC et.al. macro. A default generic |
32178cab MS |
1313 | version of that macro is made available where needed. |
1314 | ||
1315 | Since the ``TARGET_READ_PC'' et.al. macro is going to be controlled | |
1316 | by the multi-arch framework, it will eventually be possible to | |
1317 | eliminate the intermediate read_pc_pid(). The client would call | |
1318 | TARGET_READ_PC directly. (cagney). */ | |
1319 | ||
32178cab | 1320 | CORE_ADDR |
39f77062 | 1321 | generic_target_read_pc (ptid_t ptid) |
32178cab MS |
1322 | { |
1323 | #ifdef PC_REGNUM | |
1324 | if (PC_REGNUM >= 0) | |
1325 | { | |
39f77062 | 1326 | CORE_ADDR pc_val = ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, ptid)); |
32178cab MS |
1327 | return pc_val; |
1328 | } | |
1329 | #endif | |
8e65ff28 AC |
1330 | internal_error (__FILE__, __LINE__, |
1331 | "generic_target_read_pc"); | |
32178cab MS |
1332 | return 0; |
1333 | } | |
1334 | ||
1335 | CORE_ADDR | |
39f77062 | 1336 | read_pc_pid (ptid_t ptid) |
32178cab | 1337 | { |
39f77062 | 1338 | ptid_t saved_inferior_ptid; |
32178cab MS |
1339 | CORE_ADDR pc_val; |
1340 | ||
39f77062 KB |
1341 | /* In case ptid != inferior_ptid. */ |
1342 | saved_inferior_ptid = inferior_ptid; | |
1343 | inferior_ptid = ptid; | |
32178cab | 1344 | |
39f77062 | 1345 | pc_val = TARGET_READ_PC (ptid); |
32178cab | 1346 | |
39f77062 | 1347 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1348 | return pc_val; |
1349 | } | |
1350 | ||
1351 | CORE_ADDR | |
1352 | read_pc (void) | |
1353 | { | |
39f77062 | 1354 | return read_pc_pid (inferior_ptid); |
32178cab MS |
1355 | } |
1356 | ||
32178cab | 1357 | void |
39f77062 | 1358 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
32178cab MS |
1359 | { |
1360 | #ifdef PC_REGNUM | |
1361 | if (PC_REGNUM >= 0) | |
39f77062 | 1362 | write_register_pid (PC_REGNUM, pc, ptid); |
32178cab | 1363 | if (NPC_REGNUM >= 0) |
39f77062 | 1364 | write_register_pid (NPC_REGNUM, pc + 4, ptid); |
32178cab | 1365 | #else |
8e65ff28 AC |
1366 | internal_error (__FILE__, __LINE__, |
1367 | "generic_target_write_pc"); | |
32178cab MS |
1368 | #endif |
1369 | } | |
1370 | ||
1371 | void | |
39f77062 | 1372 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1373 | { |
39f77062 | 1374 | ptid_t saved_inferior_ptid; |
32178cab | 1375 | |
39f77062 KB |
1376 | /* In case ptid != inferior_ptid. */ |
1377 | saved_inferior_ptid = inferior_ptid; | |
1378 | inferior_ptid = ptid; | |
32178cab | 1379 | |
39f77062 | 1380 | TARGET_WRITE_PC (pc, ptid); |
32178cab | 1381 | |
39f77062 | 1382 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1383 | } |
1384 | ||
1385 | void | |
1386 | write_pc (CORE_ADDR pc) | |
1387 | { | |
39f77062 | 1388 | write_pc_pid (pc, inferior_ptid); |
32178cab MS |
1389 | } |
1390 | ||
1391 | /* Cope with strage ways of getting to the stack and frame pointers */ | |
1392 | ||
32178cab MS |
1393 | CORE_ADDR |
1394 | generic_target_read_sp (void) | |
1395 | { | |
1396 | #ifdef SP_REGNUM | |
1397 | if (SP_REGNUM >= 0) | |
1398 | return read_register (SP_REGNUM); | |
1399 | #endif | |
8e65ff28 AC |
1400 | internal_error (__FILE__, __LINE__, |
1401 | "generic_target_read_sp"); | |
32178cab MS |
1402 | } |
1403 | ||
1404 | CORE_ADDR | |
1405 | read_sp (void) | |
1406 | { | |
1407 | return TARGET_READ_SP (); | |
1408 | } | |
1409 | ||
32178cab MS |
1410 | void |
1411 | generic_target_write_sp (CORE_ADDR val) | |
1412 | { | |
1413 | #ifdef SP_REGNUM | |
1414 | if (SP_REGNUM >= 0) | |
1415 | { | |
1416 | write_register (SP_REGNUM, val); | |
1417 | return; | |
1418 | } | |
1419 | #endif | |
8e65ff28 AC |
1420 | internal_error (__FILE__, __LINE__, |
1421 | "generic_target_write_sp"); | |
32178cab MS |
1422 | } |
1423 | ||
32178cab | 1424 | CORE_ADDR |
0ba6dca9 | 1425 | deprecated_read_fp (void) |
32178cab | 1426 | { |
0ba6dca9 AC |
1427 | if (DEPRECATED_TARGET_READ_FP_P ()) |
1428 | return DEPRECATED_TARGET_READ_FP (); | |
1429 | else if (DEPRECATED_FP_REGNUM >= 0) | |
1430 | return read_register (DEPRECATED_FP_REGNUM); | |
1431 | else | |
1432 | internal_error (__FILE__, __LINE__, "deprecated_read_fp"); | |
32178cab MS |
1433 | } |
1434 | ||
705152c5 MS |
1435 | /* ARGSUSED */ |
1436 | static void | |
1437 | reg_flush_command (char *command, int from_tty) | |
1438 | { | |
1439 | /* Force-flush the register cache. */ | |
1440 | registers_changed (); | |
1441 | if (from_tty) | |
1442 | printf_filtered ("Register cache flushed.\n"); | |
1443 | } | |
1444 | ||
32178cab MS |
1445 | static void |
1446 | build_regcache (void) | |
3fadccb3 AC |
1447 | { |
1448 | current_regcache = regcache_xmalloc (current_gdbarch); | |
2d28509a | 1449 | current_regcache->readonly_p = 0; |
524d7c18 | 1450 | deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache); |
8262ee23 | 1451 | deprecated_register_valid = deprecated_grub_regcache_for_register_valid (current_regcache); |
3fadccb3 AC |
1452 | } |
1453 | ||
af030b9a AC |
1454 | static void |
1455 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
1456 | const unsigned char *buf, long len) | |
1457 | { | |
1458 | int i; | |
1459 | switch (endian) | |
1460 | { | |
1461 | case BFD_ENDIAN_BIG: | |
1462 | for (i = 0; i < len; i++) | |
1463 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1464 | break; | |
1465 | case BFD_ENDIAN_LITTLE: | |
1466 | for (i = len - 1; i >= 0; i--) | |
1467 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1468 | break; | |
1469 | default: | |
1470 | internal_error (__FILE__, __LINE__, "Bad switch"); | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | enum regcache_dump_what | |
1475 | { | |
b59ff9d5 | 1476 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
af030b9a AC |
1477 | }; |
1478 | ||
1479 | static void | |
1480 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1481 | enum regcache_dump_what what_to_dump) | |
1482 | { | |
1483 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 AC |
1484 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
1485 | struct reggroup *const *groups = reggroups (gdbarch); | |
af030b9a AC |
1486 | int regnum; |
1487 | int footnote_nr = 0; | |
1488 | int footnote_register_size = 0; | |
1489 | int footnote_register_offset = 0; | |
1490 | int footnote_register_type_name_null = 0; | |
1491 | long register_offset = 0; | |
1492 | unsigned char *buf = alloca (regcache->descr->max_register_size); | |
1493 | ||
1494 | #if 0 | |
1495 | fprintf_unfiltered (file, "legacy_p %d\n", regcache->descr->legacy_p); | |
1496 | fprintf_unfiltered (file, "nr_raw_registers %d\n", | |
1497 | regcache->descr->nr_raw_registers); | |
1498 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1499 | regcache->descr->nr_cooked_registers); | |
1500 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1501 | regcache->descr->sizeof_raw_registers); | |
1502 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1503 | regcache->descr->sizeof_raw_register_valid_p); | |
1504 | fprintf_unfiltered (file, "max_register_size %ld\n", | |
1505 | regcache->descr->max_register_size); | |
1506 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); | |
1507 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); | |
1508 | #endif | |
1509 | ||
1510 | gdb_assert (regcache->descr->nr_cooked_registers | |
1511 | == (NUM_REGS + NUM_PSEUDO_REGS)); | |
1512 | ||
1513 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1514 | { | |
1515 | /* Name. */ | |
1516 | if (regnum < 0) | |
1517 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1518 | else | |
1519 | { | |
1520 | const char *p = REGISTER_NAME (regnum); | |
1521 | if (p == NULL) | |
1522 | p = ""; | |
1523 | else if (p[0] == '\0') | |
1524 | p = "''"; | |
1525 | fprintf_unfiltered (file, " %-10s", p); | |
1526 | } | |
1527 | ||
1528 | /* Number. */ | |
1529 | if (regnum < 0) | |
1530 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1531 | else | |
1532 | fprintf_unfiltered (file, " %4d", regnum); | |
1533 | ||
1534 | /* Relative number. */ | |
1535 | if (regnum < 0) | |
1536 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1537 | else if (regnum < NUM_REGS) | |
1538 | fprintf_unfiltered (file, " %4d", regnum); | |
1539 | else | |
1540 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); | |
1541 | ||
1542 | /* Offset. */ | |
1543 | if (regnum < 0) | |
1544 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1545 | else | |
1546 | { | |
1547 | fprintf_unfiltered (file, " %6ld", | |
1548 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1549 | if (register_offset != regcache->descr->register_offset[regnum] |
d3b22ed5 AC |
1550 | || register_offset != REGISTER_BYTE (regnum) |
1551 | || (regnum > 0 | |
1552 | && (regcache->descr->register_offset[regnum] | |
1553 | != (regcache->descr->register_offset[regnum - 1] | |
1554 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1555 | ) | |
af030b9a AC |
1556 | { |
1557 | if (!footnote_register_offset) | |
1558 | footnote_register_offset = ++footnote_nr; | |
1559 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1560 | } | |
1561 | else | |
1562 | fprintf_unfiltered (file, " "); | |
1563 | register_offset = (regcache->descr->register_offset[regnum] | |
1564 | + regcache->descr->sizeof_register[regnum]); | |
1565 | } | |
1566 | ||
1567 | /* Size. */ | |
1568 | if (regnum < 0) | |
1569 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1570 | else | |
1571 | { | |
1572 | fprintf_unfiltered (file, " %5ld", | |
1573 | regcache->descr->sizeof_register[regnum]); | |
1574 | if ((regcache->descr->sizeof_register[regnum] | |
1575 | != REGISTER_RAW_SIZE (regnum)) | |
1576 | || (regcache->descr->sizeof_register[regnum] | |
1577 | != REGISTER_VIRTUAL_SIZE (regnum)) | |
1578 | || (regcache->descr->sizeof_register[regnum] | |
bb425013 AC |
1579 | != TYPE_LENGTH (register_type (regcache->descr->gdbarch, |
1580 | regnum))) | |
af030b9a AC |
1581 | ) |
1582 | { | |
1583 | if (!footnote_register_size) | |
1584 | footnote_register_size = ++footnote_nr; | |
1585 | fprintf_unfiltered (file, "*%d", footnote_register_size); | |
1586 | } | |
1587 | else | |
1588 | fprintf_unfiltered (file, " "); | |
1589 | } | |
1590 | ||
1591 | /* Type. */ | |
b59ff9d5 AC |
1592 | { |
1593 | const char *t; | |
1594 | if (regnum < 0) | |
1595 | t = "Type"; | |
1596 | else | |
1597 | { | |
1598 | static const char blt[] = "builtin_type"; | |
1599 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); | |
1600 | if (t == NULL) | |
1601 | { | |
1602 | char *n; | |
1603 | if (!footnote_register_type_name_null) | |
1604 | footnote_register_type_name_null = ++footnote_nr; | |
1605 | xasprintf (&n, "*%d", footnote_register_type_name_null); | |
1606 | make_cleanup (xfree, n); | |
1607 | t = n; | |
1608 | } | |
1609 | /* Chop a leading builtin_type. */ | |
1610 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1611 | t += strlen (blt); | |
1612 | } | |
1613 | fprintf_unfiltered (file, " %-15s", t); | |
1614 | } | |
1615 | ||
1616 | /* Leading space always present. */ | |
1617 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1618 | |
1619 | /* Value, raw. */ | |
1620 | if (what_to_dump == regcache_dump_raw) | |
1621 | { | |
1622 | if (regnum < 0) | |
1623 | fprintf_unfiltered (file, "Raw value"); | |
1624 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1625 | fprintf_unfiltered (file, "<cooked>"); | |
1626 | else if (!regcache_valid_p (regcache, regnum)) | |
1627 | fprintf_unfiltered (file, "<invalid>"); | |
1628 | else | |
1629 | { | |
1630 | regcache_raw_read (regcache, regnum, buf); | |
1631 | fprintf_unfiltered (file, "0x"); | |
1632 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1633 | REGISTER_RAW_SIZE (regnum)); | |
1634 | } | |
1635 | } | |
1636 | ||
1637 | /* Value, cooked. */ | |
1638 | if (what_to_dump == regcache_dump_cooked) | |
1639 | { | |
1640 | if (regnum < 0) | |
1641 | fprintf_unfiltered (file, "Cooked value"); | |
1642 | else | |
1643 | { | |
1644 | regcache_cooked_read (regcache, regnum, buf); | |
1645 | fprintf_unfiltered (file, "0x"); | |
1646 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1647 | REGISTER_VIRTUAL_SIZE (regnum)); | |
1648 | } | |
1649 | } | |
1650 | ||
b59ff9d5 AC |
1651 | /* Group members. */ |
1652 | if (what_to_dump == regcache_dump_groups) | |
1653 | { | |
1654 | if (regnum < 0) | |
1655 | fprintf_unfiltered (file, "Groups"); | |
1656 | else | |
1657 | { | |
1658 | int i; | |
1659 | const char *sep = ""; | |
1660 | for (i = 0; groups[i] != NULL; i++) | |
1661 | { | |
1662 | if (gdbarch_register_reggroup_p (gdbarch, regnum, groups[i])) | |
1663 | { | |
1664 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (groups[i])); | |
1665 | sep = ","; | |
1666 | } | |
1667 | } | |
1668 | } | |
1669 | } | |
1670 | ||
af030b9a AC |
1671 | fprintf_unfiltered (file, "\n"); |
1672 | } | |
1673 | ||
1674 | if (footnote_register_size) | |
1675 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1676 | footnote_register_size); | |
1677 | if (footnote_register_offset) | |
1678 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1679 | footnote_register_offset); | |
1680 | if (footnote_register_type_name_null) | |
1681 | fprintf_unfiltered (file, | |
1682 | "*%d: Register type's name NULL.\n", | |
1683 | footnote_register_type_name_null); | |
1684 | do_cleanups (cleanups); | |
1685 | } | |
1686 | ||
1687 | static void | |
1688 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1689 | { | |
1690 | if (args == NULL) | |
1691 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); | |
1692 | else | |
1693 | { | |
1694 | struct ui_file *file = gdb_fopen (args, "w"); | |
1695 | if (file == NULL) | |
1696 | perror_with_name ("maintenance print architecture"); | |
1697 | regcache_dump (current_regcache, file, what_to_dump); | |
1698 | ui_file_delete (file); | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | static void | |
1703 | maintenance_print_registers (char *args, int from_tty) | |
1704 | { | |
1705 | regcache_print (args, regcache_dump_none); | |
1706 | } | |
1707 | ||
1708 | static void | |
1709 | maintenance_print_raw_registers (char *args, int from_tty) | |
1710 | { | |
1711 | regcache_print (args, regcache_dump_raw); | |
1712 | } | |
1713 | ||
1714 | static void | |
1715 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1716 | { | |
1717 | regcache_print (args, regcache_dump_cooked); | |
1718 | } | |
1719 | ||
b59ff9d5 AC |
1720 | static void |
1721 | maintenance_print_register_groups (char *args, int from_tty) | |
1722 | { | |
1723 | regcache_print (args, regcache_dump_groups); | |
1724 | } | |
1725 | ||
32178cab MS |
1726 | void |
1727 | _initialize_regcache (void) | |
1728 | { | |
3fadccb3 AC |
1729 | regcache_descr_handle = register_gdbarch_data (init_regcache_descr, |
1730 | xfree_regcache_descr); | |
1731 | REGISTER_GDBARCH_SWAP (current_regcache); | |
524d7c18 | 1732 | register_gdbarch_swap (&deprecated_registers, sizeof (deprecated_registers), NULL); |
8262ee23 | 1733 | register_gdbarch_swap (&deprecated_register_valid, sizeof (deprecated_register_valid), NULL); |
32178cab | 1734 | register_gdbarch_swap (NULL, 0, build_regcache); |
705152c5 MS |
1735 | |
1736 | add_com ("flushregs", class_maintenance, reg_flush_command, | |
1737 | "Force gdb to flush its register cache (maintainer command)"); | |
39f77062 KB |
1738 | |
1739 | /* Initialize the thread/process associated with the current set of | |
1740 | registers. For now, -1 is special, and means `no current process'. */ | |
1741 | registers_ptid = pid_to_ptid (-1); | |
af030b9a AC |
1742 | |
1743 | add_cmd ("registers", class_maintenance, | |
1744 | maintenance_print_registers, | |
1745 | "Print the internal register configuration.\ | |
1746 | Takes an optional file parameter.", | |
1747 | &maintenanceprintlist); | |
1748 | add_cmd ("raw-registers", class_maintenance, | |
1749 | maintenance_print_raw_registers, | |
1750 | "Print the internal register configuration including raw values.\ | |
1751 | Takes an optional file parameter.", | |
1752 | &maintenanceprintlist); | |
1753 | add_cmd ("cooked-registers", class_maintenance, | |
1754 | maintenance_print_cooked_registers, | |
1755 | "Print the internal register configuration including cooked values.\ | |
b59ff9d5 AC |
1756 | Takes an optional file parameter.", |
1757 | &maintenanceprintlist); | |
1758 | add_cmd ("register-groups", class_maintenance, | |
1759 | maintenance_print_register_groups, | |
1760 | "Print the internal register configuration including each register's group.\ | |
af030b9a AC |
1761 | Takes an optional file parameter.", |
1762 | &maintenanceprintlist); | |
1763 | ||
32178cab | 1764 | } |