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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001, |
7b6bb8da | 4 | 2002, 2004, 2007, 2008, 2009, 2010, 2011 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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
32178cab MS |
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 | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
32178cab MS |
20 | |
21 | #include "defs.h" | |
32178cab MS |
22 | #include "inferior.h" |
23 | #include "target.h" | |
24 | #include "gdbarch.h" | |
705152c5 | 25 | #include "gdbcmd.h" |
4e052eda | 26 | #include "regcache.h" |
b59ff9d5 | 27 | #include "reggroups.h" |
61a0eb5b | 28 | #include "gdb_assert.h" |
b66d6d2e | 29 | #include "gdb_string.h" |
af030b9a | 30 | #include "gdbcmd.h" /* For maintenanceprintlist. */ |
f4c5303c | 31 | #include "observer.h" |
32178cab MS |
32 | |
33 | /* | |
34 | * DATA STRUCTURE | |
35 | * | |
36 | * Here is the actual register cache. | |
37 | */ | |
38 | ||
3fadccb3 | 39 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 40 | Computed once when the architecture is created. */ |
3fadccb3 AC |
41 | |
42 | struct gdbarch_data *regcache_descr_handle; | |
43 | ||
44 | struct regcache_descr | |
45 | { | |
46 | /* The architecture this descriptor belongs to. */ | |
47 | struct gdbarch *gdbarch; | |
48 | ||
bb1db049 AC |
49 | /* The raw register cache. Each raw (or hard) register is supplied |
50 | by the target interface. The raw cache should not contain | |
51 | redundant information - if the PC is constructed from two | |
d2f0b918 | 52 | registers then those registers and not the PC lives in the raw |
bb1db049 | 53 | cache. */ |
3fadccb3 AC |
54 | int nr_raw_registers; |
55 | long sizeof_raw_registers; | |
56 | long sizeof_raw_register_valid_p; | |
57 | ||
d138e37a AC |
58 | /* The cooked register space. Each cooked register in the range |
59 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
60 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 61 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 62 | both raw registers and memory by the architecture methods |
02f60eae | 63 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 64 | int nr_cooked_registers; |
067df2e5 AC |
65 | long sizeof_cooked_registers; |
66 | long sizeof_cooked_register_valid_p; | |
d138e37a AC |
67 | |
68 | /* Offset and size (in 8 bit bytes), of reach register in the | |
69 | register cache. All registers (including those in the range | |
99e42fd8 PA |
70 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
71 | offset. */ | |
3fadccb3 | 72 | long *register_offset; |
3fadccb3 | 73 | long *sizeof_register; |
3fadccb3 | 74 | |
bb425013 AC |
75 | /* Cached table containing the type of each register. */ |
76 | struct type **register_type; | |
3fadccb3 AC |
77 | }; |
78 | ||
3fadccb3 AC |
79 | static void * |
80 | init_regcache_descr (struct gdbarch *gdbarch) | |
81 | { | |
82 | int i; | |
83 | struct regcache_descr *descr; | |
84 | gdb_assert (gdbarch != NULL); | |
85 | ||
bb425013 | 86 | /* Create an initial, zero filled, table. */ |
116f06ea | 87 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 88 | descr->gdbarch = gdbarch; |
3fadccb3 | 89 | |
d138e37a AC |
90 | /* Total size of the register space. The raw registers are mapped |
91 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 92 | either mapped onto raw-registers or memory. */ |
214e098a UW |
93 | descr->nr_cooked_registers = gdbarch_num_regs (gdbarch) |
94 | + gdbarch_num_pseudo_regs (gdbarch); | |
95 | descr->sizeof_cooked_register_valid_p = gdbarch_num_regs (gdbarch) | |
f57d151a | 96 | + gdbarch_num_pseudo_regs |
214e098a | 97 | (gdbarch); |
3fadccb3 | 98 | |
bb425013 | 99 | /* Fill in a table of register types. */ |
116f06ea | 100 | descr->register_type |
3e43a32a MS |
101 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
102 | struct type *); | |
bb425013 | 103 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 104 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 105 | |
bb1db049 AC |
106 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
107 | into the register cache. */ | |
214e098a | 108 | descr->nr_raw_registers = gdbarch_num_regs (gdbarch); |
99e42fd8 | 109 | descr->sizeof_raw_register_valid_p = gdbarch_num_regs (gdbarch); |
bb1db049 | 110 | |
067df2e5 | 111 | /* Lay out the register cache. |
3fadccb3 | 112 | |
bb425013 AC |
113 | NOTE: cagney/2002-05-22: Only register_type() is used when |
114 | constructing the register cache. It is assumed that the | |
115 | register's raw size, virtual size and type length are all the | |
116 | same. */ | |
3fadccb3 AC |
117 | |
118 | { | |
119 | long offset = 0; | |
123f5f96 | 120 | |
116f06ea AC |
121 | descr->sizeof_register |
122 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
123 | descr->register_offset | |
124 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
99e42fd8 PA |
125 | for (i = 0; i < descr->nr_raw_registers; i++) |
126 | { | |
127 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); | |
128 | descr->register_offset[i] = offset; | |
129 | offset += descr->sizeof_register[i]; | |
130 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); | |
131 | } | |
132 | /* Set the real size of the raw register cache buffer. */ | |
133 | descr->sizeof_raw_registers = offset; | |
134 | ||
135 | for (; i < descr->nr_cooked_registers; i++) | |
3fadccb3 | 136 | { |
bb425013 | 137 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
138 | descr->register_offset[i] = offset; |
139 | offset += descr->sizeof_register[i]; | |
123a958e | 140 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
3fadccb3 | 141 | } |
99e42fd8 | 142 | /* Set the real size of the readonly register cache buffer. */ |
067df2e5 | 143 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
144 | } |
145 | ||
3fadccb3 AC |
146 | return descr; |
147 | } | |
148 | ||
149 | static struct regcache_descr * | |
150 | regcache_descr (struct gdbarch *gdbarch) | |
151 | { | |
152 | return gdbarch_data (gdbarch, regcache_descr_handle); | |
153 | } | |
154 | ||
bb425013 AC |
155 | /* Utility functions returning useful register attributes stored in |
156 | the regcache descr. */ | |
157 | ||
158 | struct type * | |
159 | register_type (struct gdbarch *gdbarch, int regnum) | |
160 | { | |
161 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
123f5f96 | 162 | |
bb425013 AC |
163 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
164 | return descr->register_type[regnum]; | |
165 | } | |
166 | ||
0ed04cce AC |
167 | /* Utility functions returning useful register attributes stored in |
168 | the regcache descr. */ | |
169 | ||
08a617da AC |
170 | int |
171 | register_size (struct gdbarch *gdbarch, int regnum) | |
172 | { | |
173 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
174 | int size; | |
123f5f96 | 175 | |
f57d151a | 176 | gdb_assert (regnum >= 0 |
214e098a UW |
177 | && regnum < (gdbarch_num_regs (gdbarch) |
178 | + gdbarch_num_pseudo_regs (gdbarch))); | |
08a617da | 179 | size = descr->sizeof_register[regnum]; |
08a617da AC |
180 | return size; |
181 | } | |
182 | ||
3fadccb3 AC |
183 | /* The register cache for storing raw register values. */ |
184 | ||
185 | struct regcache | |
186 | { | |
187 | struct regcache_descr *descr; | |
6c95b8df PA |
188 | |
189 | /* The address space of this register cache (for registers where it | |
190 | makes sense, like PC or SP). */ | |
191 | struct address_space *aspace; | |
192 | ||
51b1fe4e | 193 | /* The register buffers. A read-only register cache can hold the |
f57d151a UW |
194 | full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write |
195 | register cache can only hold [0 .. gdbarch_num_regs). */ | |
2d522557 | 196 | gdb_byte *registers; |
b05e64e5 FR |
197 | /* Register cache status: |
198 | register_valid_p[REG] == 0 if REG value is not in the cache | |
199 | > 0 if REG value is in the cache | |
200 | < 0 if REG value is permanently unavailable */ | |
201 | signed char *register_valid_p; | |
2d28509a AC |
202 | /* Is this a read-only cache? A read-only cache is used for saving |
203 | the target's register state (e.g, across an inferior function | |
204 | call or just before forcing a function return). A read-only | |
205 | cache can only be updated via the methods regcache_dup() and | |
206 | regcache_cpy(). The actual contents are determined by the | |
207 | reggroup_save and reggroup_restore methods. */ | |
208 | int readonly_p; | |
594f7785 UW |
209 | /* If this is a read-write cache, which thread's registers is |
210 | it connected to? */ | |
211 | ptid_t ptid; | |
3fadccb3 AC |
212 | }; |
213 | ||
99e42fd8 PA |
214 | static struct regcache * |
215 | regcache_xmalloc_1 (struct gdbarch *gdbarch, struct address_space *aspace, | |
216 | int readonly_p) | |
3fadccb3 AC |
217 | { |
218 | struct regcache_descr *descr; | |
219 | struct regcache *regcache; | |
123f5f96 | 220 | |
3fadccb3 AC |
221 | gdb_assert (gdbarch != NULL); |
222 | descr = regcache_descr (gdbarch); | |
223 | regcache = XMALLOC (struct regcache); | |
224 | regcache->descr = descr; | |
99e42fd8 PA |
225 | regcache->readonly_p = readonly_p; |
226 | if (readonly_p) | |
227 | { | |
228 | regcache->registers | |
229 | = XCALLOC (descr->sizeof_cooked_registers, gdb_byte); | |
230 | regcache->register_valid_p | |
231 | = XCALLOC (descr->sizeof_cooked_register_valid_p, gdb_byte); | |
232 | } | |
233 | else | |
234 | { | |
235 | regcache->registers | |
236 | = XCALLOC (descr->sizeof_raw_registers, gdb_byte); | |
237 | regcache->register_valid_p | |
238 | = XCALLOC (descr->sizeof_raw_register_valid_p, gdb_byte); | |
239 | } | |
d37346f0 | 240 | regcache->aspace = aspace; |
594f7785 | 241 | regcache->ptid = minus_one_ptid; |
3fadccb3 AC |
242 | return regcache; |
243 | } | |
244 | ||
99e42fd8 PA |
245 | struct regcache * |
246 | regcache_xmalloc (struct gdbarch *gdbarch, struct address_space *aspace) | |
247 | { | |
248 | return regcache_xmalloc_1 (gdbarch, aspace, 1); | |
249 | } | |
250 | ||
3fadccb3 AC |
251 | void |
252 | regcache_xfree (struct regcache *regcache) | |
253 | { | |
254 | if (regcache == NULL) | |
255 | return; | |
51b1fe4e AC |
256 | xfree (regcache->registers); |
257 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
258 | xfree (regcache); |
259 | } | |
260 | ||
b9362cc7 | 261 | static void |
36160dc4 AC |
262 | do_regcache_xfree (void *data) |
263 | { | |
264 | regcache_xfree (data); | |
265 | } | |
266 | ||
267 | struct cleanup * | |
268 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
269 | { | |
270 | return make_cleanup (do_regcache_xfree, regcache); | |
271 | } | |
272 | ||
41d35cb0 MK |
273 | /* Return REGCACHE's architecture. */ |
274 | ||
275 | struct gdbarch * | |
276 | get_regcache_arch (const struct regcache *regcache) | |
277 | { | |
278 | return regcache->descr->gdbarch; | |
279 | } | |
280 | ||
6c95b8df PA |
281 | struct address_space * |
282 | get_regcache_aspace (const struct regcache *regcache) | |
283 | { | |
284 | return regcache->aspace; | |
285 | } | |
286 | ||
51b1fe4e AC |
287 | /* Return a pointer to register REGNUM's buffer cache. */ |
288 | ||
2d522557 | 289 | static gdb_byte * |
9a661b68 | 290 | register_buffer (const struct regcache *regcache, int regnum) |
51b1fe4e AC |
291 | { |
292 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
293 | } | |
294 | ||
2d28509a | 295 | void |
5602984a AC |
296 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
297 | void *src) | |
2d28509a AC |
298 | { |
299 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
2d522557 | 300 | gdb_byte buf[MAX_REGISTER_SIZE]; |
2d28509a | 301 | int regnum; |
123f5f96 | 302 | |
2d28509a | 303 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 304 | end up trying to write the register values back out to the |
2d28509a | 305 | target. */ |
2d28509a AC |
306 | gdb_assert (dst->readonly_p); |
307 | /* Clear the dest. */ | |
308 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
3e43a32a MS |
309 | memset (dst->register_valid_p, 0, |
310 | dst->descr->sizeof_cooked_register_valid_p); | |
2d28509a | 311 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
312 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
313 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 314 | to save/restore `cooked' registers that live in memory. */ |
2d28509a AC |
315 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
316 | { | |
317 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
318 | { | |
5602984a | 319 | int valid = cooked_read (src, regnum, buf); |
123f5f96 | 320 | |
5602984a AC |
321 | if (valid) |
322 | { | |
323 | memcpy (register_buffer (dst, regnum), buf, | |
324 | register_size (gdbarch, regnum)); | |
325 | dst->register_valid_p[regnum] = 1; | |
326 | } | |
2d28509a AC |
327 | } |
328 | } | |
329 | } | |
330 | ||
331 | void | |
5602984a AC |
332 | regcache_restore (struct regcache *dst, |
333 | regcache_cooked_read_ftype *cooked_read, | |
2d522557 | 334 | void *cooked_read_context) |
2d28509a AC |
335 | { |
336 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
2d522557 | 337 | gdb_byte buf[MAX_REGISTER_SIZE]; |
2d28509a | 338 | int regnum; |
123f5f96 | 339 | |
5602984a AC |
340 | /* The dst had better not be read-only. If it is, the `restore' |
341 | doesn't make much sense. */ | |
2d28509a | 342 | gdb_assert (!dst->readonly_p); |
2d28509a | 343 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
344 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
345 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a AC |
346 | to save/restore `cooked' registers that live in memory. */ |
347 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 348 | { |
5602984a | 349 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 350 | { |
2d522557 | 351 | int valid = cooked_read (cooked_read_context, regnum, buf); |
123f5f96 | 352 | |
5602984a AC |
353 | if (valid) |
354 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
355 | } |
356 | } | |
357 | } | |
358 | ||
5602984a | 359 | static int |
2d522557 | 360 | do_cooked_read (void *src, int regnum, gdb_byte *buf) |
5602984a AC |
361 | { |
362 | struct regcache *regcache = src; | |
123f5f96 | 363 | |
6f4e5a41 | 364 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
5602984a AC |
365 | /* Don't even think about fetching a register from a read-only |
366 | cache when the register isn't yet valid. There isn't a target | |
367 | from which the register value can be fetched. */ | |
368 | return 0; | |
369 | regcache_cooked_read (regcache, regnum, buf); | |
370 | return 1; | |
371 | } | |
372 | ||
373 | ||
3fadccb3 AC |
374 | void |
375 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
376 | { | |
3fadccb3 AC |
377 | gdb_assert (src != NULL && dst != NULL); |
378 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
379 | gdb_assert (src != dst); | |
2d28509a | 380 | gdb_assert (src->readonly_p || dst->readonly_p); |
6c95b8df | 381 | |
2d28509a | 382 | if (!src->readonly_p) |
5602984a | 383 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 384 | else if (!dst->readonly_p) |
5602984a | 385 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
386 | else |
387 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
388 | } |
389 | ||
390 | void | |
391 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
392 | { | |
3fadccb3 AC |
393 | gdb_assert (src != NULL && dst != NULL); |
394 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
395 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
594f7785 | 396 | move of data into the current regcache. Doing this would be |
9564ee9f | 397 | silly - it would mean that valid_p would be completely invalid. */ |
99e42fd8 | 398 | gdb_assert (dst->readonly_p && src->readonly_p); |
6c95b8df | 399 | |
99e42fd8 PA |
400 | memcpy (dst->registers, src->registers, |
401 | dst->descr->sizeof_cooked_registers); | |
51b1fe4e | 402 | memcpy (dst->register_valid_p, src->register_valid_p, |
99e42fd8 | 403 | dst->descr->sizeof_cooked_register_valid_p); |
3fadccb3 AC |
404 | } |
405 | ||
406 | struct regcache * | |
407 | regcache_dup (struct regcache *src) | |
408 | { | |
409 | struct regcache *newbuf; | |
123f5f96 | 410 | |
d37346f0 | 411 | newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src)); |
3fadccb3 AC |
412 | regcache_cpy (newbuf, src); |
413 | return newbuf; | |
414 | } | |
415 | ||
3fadccb3 | 416 | int |
6ed7ea50 | 417 | regcache_valid_p (const struct regcache *regcache, int regnum) |
3fadccb3 AC |
418 | { |
419 | gdb_assert (regcache != NULL); | |
6ed7ea50 UW |
420 | gdb_assert (regnum >= 0); |
421 | if (regcache->readonly_p) | |
422 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); | |
423 | else | |
424 | gdb_assert (regnum < regcache->descr->nr_raw_registers); | |
425 | ||
51b1fe4e | 426 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
427 | } |
428 | ||
9c5ea4d9 UW |
429 | void |
430 | regcache_invalidate (struct regcache *regcache, int regnum) | |
431 | { | |
432 | gdb_assert (regcache != NULL); | |
433 | gdb_assert (regnum >= 0); | |
434 | gdb_assert (!regcache->readonly_p); | |
435 | gdb_assert (regnum < regcache->descr->nr_raw_registers); | |
436 | regcache->register_valid_p[regnum] = 0; | |
437 | } | |
438 | ||
439 | ||
3fadccb3 | 440 | /* Global structure containing the current regcache. */ |
3fadccb3 | 441 | |
5ebd2499 | 442 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
443 | recording if the register values have been changed (eg. by the |
444 | user). Therefore all registers must be written back to the | |
445 | target when appropriate. */ | |
446 | ||
c2250ad1 | 447 | struct regcache_list |
594f7785 | 448 | { |
c2250ad1 UW |
449 | struct regcache *regcache; |
450 | struct regcache_list *next; | |
451 | }; | |
452 | ||
453 | static struct regcache_list *current_regcache; | |
454 | ||
455 | struct regcache * | |
456 | get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) | |
457 | { | |
458 | struct regcache_list *list; | |
459 | struct regcache *new_regcache; | |
594f7785 | 460 | |
c2250ad1 UW |
461 | for (list = current_regcache; list; list = list->next) |
462 | if (ptid_equal (list->regcache->ptid, ptid) | |
463 | && get_regcache_arch (list->regcache) == gdbarch) | |
464 | return list->regcache; | |
594f7785 | 465 | |
99e42fd8 PA |
466 | new_regcache = regcache_xmalloc_1 (gdbarch, |
467 | target_thread_address_space (ptid), 0); | |
c2250ad1 | 468 | new_regcache->ptid = ptid; |
6c95b8df | 469 | gdb_assert (new_regcache->aspace != NULL); |
594f7785 | 470 | |
c2250ad1 UW |
471 | list = xmalloc (sizeof (struct regcache_list)); |
472 | list->regcache = new_regcache; | |
473 | list->next = current_regcache; | |
474 | current_regcache = list; | |
594f7785 | 475 | |
c2250ad1 | 476 | return new_regcache; |
594f7785 UW |
477 | } |
478 | ||
c2250ad1 UW |
479 | static ptid_t current_thread_ptid; |
480 | static struct gdbarch *current_thread_arch; | |
481 | ||
482 | struct regcache * | |
483 | get_thread_regcache (ptid_t ptid) | |
484 | { | |
485 | if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid)) | |
486 | { | |
487 | current_thread_ptid = ptid; | |
488 | current_thread_arch = target_thread_architecture (ptid); | |
489 | } | |
490 | ||
491 | return get_thread_arch_regcache (ptid, current_thread_arch); | |
492 | } | |
493 | ||
494 | struct regcache * | |
495 | get_current_regcache (void) | |
594f7785 UW |
496 | { |
497 | return get_thread_regcache (inferior_ptid); | |
498 | } | |
32178cab | 499 | |
32178cab | 500 | |
f4c5303c OF |
501 | /* Observer for the target_changed event. */ |
502 | ||
2c0b251b | 503 | static void |
f4c5303c OF |
504 | regcache_observer_target_changed (struct target_ops *target) |
505 | { | |
506 | registers_changed (); | |
507 | } | |
508 | ||
5231c1fd PA |
509 | /* Update global variables old ptids to hold NEW_PTID if they were |
510 | holding OLD_PTID. */ | |
511 | static void | |
512 | regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) | |
513 | { | |
c2250ad1 UW |
514 | struct regcache_list *list; |
515 | ||
516 | for (list = current_regcache; list; list = list->next) | |
517 | if (ptid_equal (list->regcache->ptid, old_ptid)) | |
518 | list->regcache->ptid = new_ptid; | |
5231c1fd PA |
519 | } |
520 | ||
32178cab MS |
521 | /* Low level examining and depositing of registers. |
522 | ||
523 | The caller is responsible for making sure that the inferior is | |
524 | stopped before calling the fetching routines, or it will get | |
525 | garbage. (a change from GDB version 3, in which the caller got the | |
526 | value from the last stop). */ | |
527 | ||
528 | /* REGISTERS_CHANGED () | |
529 | ||
530 | Indicate that registers may have changed, so invalidate the cache. */ | |
531 | ||
532 | void | |
e66408ed | 533 | registers_changed_ptid (ptid_t ptid) |
32178cab | 534 | { |
e66408ed | 535 | struct regcache_list *list, **list_link; |
c2250ad1 | 536 | |
e66408ed PA |
537 | list = current_regcache; |
538 | list_link = ¤t_regcache; | |
539 | while (list) | |
c2250ad1 | 540 | { |
e66408ed PA |
541 | if (ptid_match (list->regcache->ptid, ptid)) |
542 | { | |
543 | struct regcache_list *dead = list; | |
544 | ||
545 | *list_link = list->next; | |
546 | regcache_xfree (list->regcache); | |
547 | list = *list_link; | |
548 | xfree (dead); | |
549 | continue; | |
550 | } | |
551 | ||
552 | list_link = &list->next; | |
553 | list = *list_link; | |
c2250ad1 | 554 | } |
32178cab | 555 | |
594f7785 | 556 | current_regcache = NULL; |
32178cab | 557 | |
c2250ad1 UW |
558 | current_thread_ptid = null_ptid; |
559 | current_thread_arch = NULL; | |
560 | ||
0df8b418 | 561 | /* Need to forget about any frames we have cached, too. */ |
a5d9d57d DJ |
562 | reinit_frame_cache (); |
563 | ||
32178cab MS |
564 | /* Force cleanup of any alloca areas if using C alloca instead of |
565 | a builtin alloca. This particular call is used to clean up | |
566 | areas allocated by low level target code which may build up | |
567 | during lengthy interactions between gdb and the target before | |
568 | gdb gives control to the user (ie watchpoints). */ | |
569 | alloca (0); | |
32178cab MS |
570 | } |
571 | ||
e66408ed PA |
572 | void |
573 | registers_changed (void) | |
574 | { | |
575 | registers_changed_ptid (minus_one_ptid); | |
576 | } | |
32178cab | 577 | |
61a0eb5b | 578 | void |
2d522557 | 579 | regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
61a0eb5b | 580 | { |
3fadccb3 AC |
581 | gdb_assert (regcache != NULL && buf != NULL); |
582 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
3fadccb3 AC |
583 | /* Make certain that the register cache is up-to-date with respect |
584 | to the current thread. This switching shouldn't be necessary | |
585 | only there is still only one target side register cache. Sigh! | |
586 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 587 | if (!regcache->readonly_p) |
3fadccb3 | 588 | { |
594f7785 | 589 | if (!regcache_valid_p (regcache, regnum)) |
3fadccb3 | 590 | { |
594f7785 | 591 | struct cleanup *old_chain = save_inferior_ptid (); |
123f5f96 | 592 | |
594f7785 UW |
593 | inferior_ptid = regcache->ptid; |
594 | target_fetch_registers (regcache, regnum); | |
595 | do_cleanups (old_chain); | |
3fadccb3 | 596 | } |
0a8146bf AC |
597 | #if 0 |
598 | /* FIXME: cagney/2004-08-07: At present a number of targets | |
04c663e3 DA |
599 | forget (or didn't know that they needed) to set this leading to |
600 | panics. Also is the problem that targets need to indicate | |
0a8146bf AC |
601 | that a register is in one of the possible states: valid, |
602 | undefined, unknown. The last of which isn't yet | |
603 | possible. */ | |
9c5ea4d9 | 604 | gdb_assert (regcache_valid_p (regcache, regnum)); |
0a8146bf | 605 | #endif |
3fadccb3 AC |
606 | } |
607 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 608 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 609 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
610 | } |
611 | ||
28fc6740 AC |
612 | void |
613 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
614 | { | |
2d522557 | 615 | gdb_byte *buf; |
123f5f96 | 616 | |
28fc6740 AC |
617 | gdb_assert (regcache != NULL); |
618 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
619 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
620 | regcache_raw_read (regcache, regnum, buf); | |
e17a4113 UW |
621 | (*val) = extract_signed_integer |
622 | (buf, regcache->descr->sizeof_register[regnum], | |
623 | gdbarch_byte_order (regcache->descr->gdbarch)); | |
28fc6740 AC |
624 | } |
625 | ||
626 | void | |
627 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
628 | ULONGEST *val) | |
629 | { | |
2d522557 | 630 | gdb_byte *buf; |
123f5f96 | 631 | |
28fc6740 AC |
632 | gdb_assert (regcache != NULL); |
633 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
634 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
635 | regcache_raw_read (regcache, regnum, buf); | |
e17a4113 UW |
636 | (*val) = extract_unsigned_integer |
637 | (buf, regcache->descr->sizeof_register[regnum], | |
638 | gdbarch_byte_order (regcache->descr->gdbarch)); | |
28fc6740 AC |
639 | } |
640 | ||
c00dcbe9 MK |
641 | void |
642 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
643 | { | |
644 | void *buf; | |
123f5f96 | 645 | |
c00dcbe9 MK |
646 | gdb_assert (regcache != NULL); |
647 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
648 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
e17a4113 UW |
649 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], |
650 | gdbarch_byte_order (regcache->descr->gdbarch), val); | |
c00dcbe9 MK |
651 | regcache_raw_write (regcache, regnum, buf); |
652 | } | |
653 | ||
654 | void | |
655 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
656 | ULONGEST val) | |
657 | { | |
658 | void *buf; | |
123f5f96 | 659 | |
c00dcbe9 MK |
660 | gdb_assert (regcache != NULL); |
661 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
662 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
e17a4113 UW |
663 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], |
664 | gdbarch_byte_order (regcache->descr->gdbarch), val); | |
c00dcbe9 MK |
665 | regcache_raw_write (regcache, regnum, buf); |
666 | } | |
667 | ||
68365089 | 668 | void |
2d522557 | 669 | regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
68365089 | 670 | { |
d138e37a | 671 | gdb_assert (regnum >= 0); |
68365089 AC |
672 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
673 | if (regnum < regcache->descr->nr_raw_registers) | |
674 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
675 | else if (regcache->readonly_p |
676 | && regnum < regcache->descr->nr_cooked_registers | |
677 | && regcache->register_valid_p[regnum]) | |
b2fa5097 | 678 | /* Read-only register cache, perhaps the cooked value was cached? */ |
2d28509a AC |
679 | memcpy (buf, register_buffer (regcache, regnum), |
680 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 681 | else |
68365089 AC |
682 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
683 | regnum, buf); | |
61a0eb5b AC |
684 | } |
685 | ||
a378f419 AC |
686 | void |
687 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
688 | LONGEST *val) | |
689 | { | |
2d522557 | 690 | gdb_byte *buf; |
123f5f96 | 691 | |
a378f419 | 692 | gdb_assert (regcache != NULL); |
a66a9c23 | 693 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
694 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
695 | regcache_cooked_read (regcache, regnum, buf); | |
e17a4113 UW |
696 | (*val) = extract_signed_integer |
697 | (buf, regcache->descr->sizeof_register[regnum], | |
698 | gdbarch_byte_order (regcache->descr->gdbarch)); | |
a378f419 AC |
699 | } |
700 | ||
701 | void | |
702 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
703 | ULONGEST *val) | |
704 | { | |
2d522557 | 705 | gdb_byte *buf; |
123f5f96 | 706 | |
a378f419 | 707 | gdb_assert (regcache != NULL); |
a66a9c23 | 708 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
709 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
710 | regcache_cooked_read (regcache, regnum, buf); | |
e17a4113 UW |
711 | (*val) = extract_unsigned_integer |
712 | (buf, regcache->descr->sizeof_register[regnum], | |
713 | gdbarch_byte_order (regcache->descr->gdbarch)); | |
a378f419 AC |
714 | } |
715 | ||
a66a9c23 AC |
716 | void |
717 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
718 | LONGEST val) | |
719 | { | |
720 | void *buf; | |
123f5f96 | 721 | |
a66a9c23 AC |
722 | gdb_assert (regcache != NULL); |
723 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
724 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
e17a4113 UW |
725 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], |
726 | gdbarch_byte_order (regcache->descr->gdbarch), val); | |
a66a9c23 AC |
727 | regcache_cooked_write (regcache, regnum, buf); |
728 | } | |
729 | ||
730 | void | |
731 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
732 | ULONGEST val) | |
733 | { | |
734 | void *buf; | |
123f5f96 | 735 | |
a66a9c23 AC |
736 | gdb_assert (regcache != NULL); |
737 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
738 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
e17a4113 UW |
739 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], |
740 | gdbarch_byte_order (regcache->descr->gdbarch), val); | |
a66a9c23 AC |
741 | regcache_cooked_write (regcache, regnum, buf); |
742 | } | |
743 | ||
61a0eb5b | 744 | void |
2d522557 AC |
745 | regcache_raw_write (struct regcache *regcache, int regnum, |
746 | const gdb_byte *buf) | |
61a0eb5b | 747 | { |
594f7785 UW |
748 | struct cleanup *old_chain; |
749 | ||
3fadccb3 AC |
750 | gdb_assert (regcache != NULL && buf != NULL); |
751 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 752 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 753 | |
3fadccb3 AC |
754 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
755 | change the registers array if something writes to this register. */ | |
214e098a | 756 | if (gdbarch_cannot_store_register (get_regcache_arch (regcache), regnum)) |
3fadccb3 AC |
757 | return; |
758 | ||
3fadccb3 | 759 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 760 | value, then don't bother doing the actual store. */ |
3fadccb3 AC |
761 | if (regcache_valid_p (regcache, regnum) |
762 | && (memcmp (register_buffer (regcache, regnum), buf, | |
763 | regcache->descr->sizeof_register[regnum]) == 0)) | |
764 | return; | |
765 | ||
594f7785 UW |
766 | old_chain = save_inferior_ptid (); |
767 | inferior_ptid = regcache->ptid; | |
768 | ||
316f2060 | 769 | target_prepare_to_store (regcache); |
3fadccb3 AC |
770 | memcpy (register_buffer (regcache, regnum), buf, |
771 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 772 | regcache->register_valid_p[regnum] = 1; |
56be3814 | 773 | target_store_registers (regcache, regnum); |
594f7785 UW |
774 | |
775 | do_cleanups (old_chain); | |
61a0eb5b AC |
776 | } |
777 | ||
68365089 | 778 | void |
2d522557 AC |
779 | regcache_cooked_write (struct regcache *regcache, int regnum, |
780 | const gdb_byte *buf) | |
68365089 | 781 | { |
d138e37a | 782 | gdb_assert (regnum >= 0); |
68365089 AC |
783 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
784 | if (regnum < regcache->descr->nr_raw_registers) | |
785 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 786 | else |
68365089 | 787 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 788 | regnum, buf); |
61a0eb5b AC |
789 | } |
790 | ||
06c0b04e AC |
791 | /* Perform a partial register transfer using a read, modify, write |
792 | operation. */ | |
793 | ||
794 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
795 | void *buf); | |
796 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
797 | const void *buf); | |
798 | ||
b9362cc7 | 799 | static void |
06c0b04e AC |
800 | regcache_xfer_part (struct regcache *regcache, int regnum, |
801 | int offset, int len, void *in, const void *out, | |
2d522557 AC |
802 | void (*read) (struct regcache *regcache, int regnum, |
803 | gdb_byte *buf), | |
804 | void (*write) (struct regcache *regcache, int regnum, | |
805 | const gdb_byte *buf)) | |
06c0b04e AC |
806 | { |
807 | struct regcache_descr *descr = regcache->descr; | |
fc1a4b47 | 808 | gdb_byte reg[MAX_REGISTER_SIZE]; |
123f5f96 | 809 | |
06c0b04e AC |
810 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
811 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
812 | /* Something to do? */ | |
813 | if (offset + len == 0) | |
814 | return; | |
0df8b418 | 815 | /* Read (when needed) ... */ |
06c0b04e AC |
816 | if (in != NULL |
817 | || offset > 0 | |
818 | || offset + len < descr->sizeof_register[regnum]) | |
819 | { | |
820 | gdb_assert (read != NULL); | |
821 | read (regcache, regnum, reg); | |
822 | } | |
0df8b418 | 823 | /* ... modify ... */ |
06c0b04e AC |
824 | if (in != NULL) |
825 | memcpy (in, reg + offset, len); | |
826 | if (out != NULL) | |
827 | memcpy (reg + offset, out, len); | |
828 | /* ... write (when needed). */ | |
829 | if (out != NULL) | |
830 | { | |
831 | gdb_assert (write != NULL); | |
832 | write (regcache, regnum, reg); | |
833 | } | |
834 | } | |
835 | ||
836 | void | |
837 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
2d522557 | 838 | int offset, int len, gdb_byte *buf) |
06c0b04e AC |
839 | { |
840 | struct regcache_descr *descr = regcache->descr; | |
123f5f96 | 841 | |
06c0b04e AC |
842 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
843 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
844 | regcache_raw_read, regcache_raw_write); | |
845 | } | |
846 | ||
847 | void | |
848 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 849 | int offset, int len, const gdb_byte *buf) |
06c0b04e AC |
850 | { |
851 | struct regcache_descr *descr = regcache->descr; | |
123f5f96 | 852 | |
06c0b04e AC |
853 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); |
854 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
855 | regcache_raw_read, regcache_raw_write); | |
856 | } | |
857 | ||
858 | void | |
859 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
2d522557 | 860 | int offset, int len, gdb_byte *buf) |
06c0b04e AC |
861 | { |
862 | struct regcache_descr *descr = regcache->descr; | |
123f5f96 | 863 | |
06c0b04e AC |
864 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
865 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
866 | regcache_cooked_read, regcache_cooked_write); | |
867 | } | |
868 | ||
869 | void | |
870 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 871 | int offset, int len, const gdb_byte *buf) |
06c0b04e AC |
872 | { |
873 | struct regcache_descr *descr = regcache->descr; | |
123f5f96 | 874 | |
06c0b04e AC |
875 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
876 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
877 | regcache_cooked_read, regcache_cooked_write); | |
878 | } | |
32178cab | 879 | |
a16d75cc | 880 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
9a661b68 MK |
881 | |
882 | void | |
6618125d | 883 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
9a661b68 MK |
884 | { |
885 | void *regbuf; | |
886 | size_t size; | |
887 | ||
a16d75cc | 888 | gdb_assert (regcache != NULL); |
9a661b68 MK |
889 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); |
890 | gdb_assert (!regcache->readonly_p); | |
891 | ||
9a661b68 MK |
892 | regbuf = register_buffer (regcache, regnum); |
893 | size = regcache->descr->sizeof_register[regnum]; | |
894 | ||
895 | if (buf) | |
896 | memcpy (regbuf, buf, size); | |
897 | else | |
898 | memset (regbuf, 0, size); | |
899 | ||
900 | /* Mark the register as cached. */ | |
901 | regcache->register_valid_p[regnum] = 1; | |
902 | } | |
903 | ||
904 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ | |
905 | ||
906 | void | |
6618125d | 907 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
9a661b68 MK |
908 | { |
909 | const void *regbuf; | |
910 | size_t size; | |
911 | ||
912 | gdb_assert (regcache != NULL && buf != NULL); | |
913 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
914 | ||
915 | regbuf = register_buffer (regcache, regnum); | |
916 | size = regcache->descr->sizeof_register[regnum]; | |
917 | memcpy (buf, regbuf, size); | |
918 | } | |
919 | ||
193cb69f | 920 | |
515630c5 | 921 | /* Special handling for register PC. */ |
32178cab MS |
922 | |
923 | CORE_ADDR | |
515630c5 | 924 | regcache_read_pc (struct regcache *regcache) |
32178cab | 925 | { |
61a1198a UW |
926 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
927 | ||
32178cab MS |
928 | CORE_ADDR pc_val; |
929 | ||
61a1198a UW |
930 | if (gdbarch_read_pc_p (gdbarch)) |
931 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 932 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 933 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 934 | { |
61a1198a | 935 | ULONGEST raw_val; |
123f5f96 | 936 | |
3e8c568d | 937 | regcache_cooked_read_unsigned (regcache, |
214e098a | 938 | gdbarch_pc_regnum (gdbarch), |
3e8c568d | 939 | &raw_val); |
214e098a | 940 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
941 | } |
942 | else | |
515630c5 UW |
943 | internal_error (__FILE__, __LINE__, |
944 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
945 | return pc_val; |
946 | } | |
947 | ||
32178cab | 948 | void |
515630c5 | 949 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 950 | { |
61a1198a UW |
951 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
952 | ||
61a1198a UW |
953 | if (gdbarch_write_pc_p (gdbarch)) |
954 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 955 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 956 | regcache_cooked_write_unsigned (regcache, |
214e098a | 957 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
958 | else |
959 | internal_error (__FILE__, __LINE__, | |
515630c5 | 960 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
961 | |
962 | /* Writing the PC (for instance, from "load") invalidates the | |
963 | current frame. */ | |
964 | reinit_frame_cache (); | |
32178cab MS |
965 | } |
966 | ||
32178cab | 967 | |
705152c5 MS |
968 | static void |
969 | reg_flush_command (char *command, int from_tty) | |
970 | { | |
971 | /* Force-flush the register cache. */ | |
972 | registers_changed (); | |
973 | if (from_tty) | |
a3f17187 | 974 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
975 | } |
976 | ||
af030b9a AC |
977 | static void |
978 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
979 | const unsigned char *buf, long len) | |
980 | { | |
981 | int i; | |
123f5f96 | 982 | |
af030b9a AC |
983 | switch (endian) |
984 | { | |
985 | case BFD_ENDIAN_BIG: | |
986 | for (i = 0; i < len; i++) | |
987 | fprintf_unfiltered (file, "%02x", buf[i]); | |
988 | break; | |
989 | case BFD_ENDIAN_LITTLE: | |
990 | for (i = len - 1; i >= 0; i--) | |
991 | fprintf_unfiltered (file, "%02x", buf[i]); | |
992 | break; | |
993 | default: | |
e2e0b3e5 | 994 | internal_error (__FILE__, __LINE__, _("Bad switch")); |
af030b9a AC |
995 | } |
996 | } | |
997 | ||
998 | enum regcache_dump_what | |
999 | { | |
3e43a32a MS |
1000 | regcache_dump_none, regcache_dump_raw, |
1001 | regcache_dump_cooked, regcache_dump_groups | |
af030b9a AC |
1002 | }; |
1003 | ||
1004 | static void | |
1005 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1006 | enum regcache_dump_what what_to_dump) | |
1007 | { | |
1008 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 | 1009 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
af030b9a AC |
1010 | int regnum; |
1011 | int footnote_nr = 0; | |
1012 | int footnote_register_size = 0; | |
1013 | int footnote_register_offset = 0; | |
1014 | int footnote_register_type_name_null = 0; | |
1015 | long register_offset = 0; | |
123a958e | 1016 | unsigned char buf[MAX_REGISTER_SIZE]; |
af030b9a AC |
1017 | |
1018 | #if 0 | |
af030b9a AC |
1019 | fprintf_unfiltered (file, "nr_raw_registers %d\n", |
1020 | regcache->descr->nr_raw_registers); | |
1021 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1022 | regcache->descr->nr_cooked_registers); | |
1023 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1024 | regcache->descr->sizeof_raw_registers); | |
1025 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1026 | regcache->descr->sizeof_raw_register_valid_p); | |
f57d151a | 1027 | fprintf_unfiltered (file, "gdbarch_num_regs %d\n", |
214e098a | 1028 | gdbarch_num_regs (gdbarch)); |
f57d151a | 1029 | fprintf_unfiltered (file, "gdbarch_num_pseudo_regs %d\n", |
214e098a | 1030 | gdbarch_num_pseudo_regs (gdbarch)); |
af030b9a AC |
1031 | #endif |
1032 | ||
1033 | gdb_assert (regcache->descr->nr_cooked_registers | |
214e098a UW |
1034 | == (gdbarch_num_regs (gdbarch) |
1035 | + gdbarch_num_pseudo_regs (gdbarch))); | |
af030b9a AC |
1036 | |
1037 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1038 | { | |
1039 | /* Name. */ | |
1040 | if (regnum < 0) | |
1041 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1042 | else | |
1043 | { | |
214e098a | 1044 | const char *p = gdbarch_register_name (gdbarch, regnum); |
123f5f96 | 1045 | |
af030b9a AC |
1046 | if (p == NULL) |
1047 | p = ""; | |
1048 | else if (p[0] == '\0') | |
1049 | p = "''"; | |
1050 | fprintf_unfiltered (file, " %-10s", p); | |
1051 | } | |
1052 | ||
1053 | /* Number. */ | |
1054 | if (regnum < 0) | |
1055 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1056 | else | |
1057 | fprintf_unfiltered (file, " %4d", regnum); | |
1058 | ||
1059 | /* Relative number. */ | |
1060 | if (regnum < 0) | |
1061 | fprintf_unfiltered (file, " %4s", "Rel"); | |
214e098a | 1062 | else if (regnum < gdbarch_num_regs (gdbarch)) |
af030b9a AC |
1063 | fprintf_unfiltered (file, " %4d", regnum); |
1064 | else | |
f57d151a | 1065 | fprintf_unfiltered (file, " %4d", |
214e098a | 1066 | (regnum - gdbarch_num_regs (gdbarch))); |
af030b9a AC |
1067 | |
1068 | /* Offset. */ | |
1069 | if (regnum < 0) | |
1070 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1071 | else | |
1072 | { | |
1073 | fprintf_unfiltered (file, " %6ld", | |
1074 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1075 | if (register_offset != regcache->descr->register_offset[regnum] |
d3b22ed5 AC |
1076 | || (regnum > 0 |
1077 | && (regcache->descr->register_offset[regnum] | |
1078 | != (regcache->descr->register_offset[regnum - 1] | |
1079 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1080 | ) | |
af030b9a AC |
1081 | { |
1082 | if (!footnote_register_offset) | |
1083 | footnote_register_offset = ++footnote_nr; | |
1084 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1085 | } | |
1086 | else | |
1087 | fprintf_unfiltered (file, " "); | |
1088 | register_offset = (regcache->descr->register_offset[regnum] | |
1089 | + regcache->descr->sizeof_register[regnum]); | |
1090 | } | |
1091 | ||
1092 | /* Size. */ | |
1093 | if (regnum < 0) | |
1094 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1095 | else | |
01e1877c AC |
1096 | fprintf_unfiltered (file, " %5ld", |
1097 | regcache->descr->sizeof_register[regnum]); | |
af030b9a AC |
1098 | |
1099 | /* Type. */ | |
b59ff9d5 AC |
1100 | { |
1101 | const char *t; | |
123f5f96 | 1102 | |
b59ff9d5 AC |
1103 | if (regnum < 0) |
1104 | t = "Type"; | |
1105 | else | |
1106 | { | |
1107 | static const char blt[] = "builtin_type"; | |
123f5f96 | 1108 | |
b59ff9d5 AC |
1109 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); |
1110 | if (t == NULL) | |
1111 | { | |
1112 | char *n; | |
123f5f96 | 1113 | |
b59ff9d5 AC |
1114 | if (!footnote_register_type_name_null) |
1115 | footnote_register_type_name_null = ++footnote_nr; | |
b435e160 | 1116 | n = xstrprintf ("*%d", footnote_register_type_name_null); |
b59ff9d5 AC |
1117 | make_cleanup (xfree, n); |
1118 | t = n; | |
1119 | } | |
1120 | /* Chop a leading builtin_type. */ | |
1121 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1122 | t += strlen (blt); | |
1123 | } | |
1124 | fprintf_unfiltered (file, " %-15s", t); | |
1125 | } | |
1126 | ||
1127 | /* Leading space always present. */ | |
1128 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1129 | |
1130 | /* Value, raw. */ | |
1131 | if (what_to_dump == regcache_dump_raw) | |
1132 | { | |
1133 | if (regnum < 0) | |
1134 | fprintf_unfiltered (file, "Raw value"); | |
1135 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1136 | fprintf_unfiltered (file, "<cooked>"); | |
1137 | else if (!regcache_valid_p (regcache, regnum)) | |
1138 | fprintf_unfiltered (file, "<invalid>"); | |
1139 | else | |
1140 | { | |
1141 | regcache_raw_read (regcache, regnum, buf); | |
1142 | fprintf_unfiltered (file, "0x"); | |
0d20ae72 | 1143 | dump_endian_bytes (file, |
214e098a | 1144 | gdbarch_byte_order (gdbarch), buf, |
01e1877c | 1145 | regcache->descr->sizeof_register[regnum]); |
af030b9a AC |
1146 | } |
1147 | } | |
1148 | ||
1149 | /* Value, cooked. */ | |
1150 | if (what_to_dump == regcache_dump_cooked) | |
1151 | { | |
1152 | if (regnum < 0) | |
1153 | fprintf_unfiltered (file, "Cooked value"); | |
1154 | else | |
1155 | { | |
1156 | regcache_cooked_read (regcache, regnum, buf); | |
1157 | fprintf_unfiltered (file, "0x"); | |
0d20ae72 | 1158 | dump_endian_bytes (file, |
214e098a | 1159 | gdbarch_byte_order (gdbarch), buf, |
01e1877c | 1160 | regcache->descr->sizeof_register[regnum]); |
af030b9a AC |
1161 | } |
1162 | } | |
1163 | ||
b59ff9d5 AC |
1164 | /* Group members. */ |
1165 | if (what_to_dump == regcache_dump_groups) | |
1166 | { | |
1167 | if (regnum < 0) | |
1168 | fprintf_unfiltered (file, "Groups"); | |
1169 | else | |
1170 | { | |
b59ff9d5 | 1171 | const char *sep = ""; |
6c7d17ba | 1172 | struct reggroup *group; |
123f5f96 | 1173 | |
6c7d17ba AC |
1174 | for (group = reggroup_next (gdbarch, NULL); |
1175 | group != NULL; | |
1176 | group = reggroup_next (gdbarch, group)) | |
b59ff9d5 | 1177 | { |
6c7d17ba | 1178 | if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
b59ff9d5 | 1179 | { |
3e43a32a MS |
1180 | fprintf_unfiltered (file, |
1181 | "%s%s", sep, reggroup_name (group)); | |
b59ff9d5 AC |
1182 | sep = ","; |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | } | |
1187 | ||
af030b9a AC |
1188 | fprintf_unfiltered (file, "\n"); |
1189 | } | |
1190 | ||
1191 | if (footnote_register_size) | |
1192 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1193 | footnote_register_size); | |
1194 | if (footnote_register_offset) | |
1195 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1196 | footnote_register_offset); | |
1197 | if (footnote_register_type_name_null) | |
1198 | fprintf_unfiltered (file, | |
1199 | "*%d: Register type's name NULL.\n", | |
1200 | footnote_register_type_name_null); | |
1201 | do_cleanups (cleanups); | |
1202 | } | |
1203 | ||
1204 | static void | |
1205 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1206 | { | |
1207 | if (args == NULL) | |
28c38f10 | 1208 | regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump); |
af030b9a AC |
1209 | else |
1210 | { | |
724b958c | 1211 | struct cleanup *cleanups; |
af030b9a | 1212 | struct ui_file *file = gdb_fopen (args, "w"); |
123f5f96 | 1213 | |
af030b9a | 1214 | if (file == NULL) |
e2e0b3e5 | 1215 | perror_with_name (_("maintenance print architecture")); |
724b958c | 1216 | cleanups = make_cleanup_ui_file_delete (file); |
28c38f10 | 1217 | regcache_dump (get_current_regcache (), file, what_to_dump); |
724b958c | 1218 | do_cleanups (cleanups); |
af030b9a AC |
1219 | } |
1220 | } | |
1221 | ||
1222 | static void | |
1223 | maintenance_print_registers (char *args, int from_tty) | |
1224 | { | |
1225 | regcache_print (args, regcache_dump_none); | |
1226 | } | |
1227 | ||
1228 | static void | |
1229 | maintenance_print_raw_registers (char *args, int from_tty) | |
1230 | { | |
1231 | regcache_print (args, regcache_dump_raw); | |
1232 | } | |
1233 | ||
1234 | static void | |
1235 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1236 | { | |
1237 | regcache_print (args, regcache_dump_cooked); | |
1238 | } | |
1239 | ||
b59ff9d5 AC |
1240 | static void |
1241 | maintenance_print_register_groups (char *args, int from_tty) | |
1242 | { | |
1243 | regcache_print (args, regcache_dump_groups); | |
1244 | } | |
1245 | ||
b9362cc7 AC |
1246 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
1247 | ||
32178cab MS |
1248 | void |
1249 | _initialize_regcache (void) | |
1250 | { | |
3e43a32a MS |
1251 | regcache_descr_handle |
1252 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1253 | |
f4c5303c | 1254 | observer_attach_target_changed (regcache_observer_target_changed); |
5231c1fd | 1255 | observer_attach_thread_ptid_changed (regcache_thread_ptid_changed); |
f4c5303c | 1256 | |
705152c5 | 1257 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1bedd215 | 1258 | _("Force gdb to flush its register cache (maintainer command)")); |
39f77062 | 1259 | |
3e43a32a MS |
1260 | add_cmd ("registers", class_maintenance, maintenance_print_registers, |
1261 | _("Print the internal register configuration.\n" | |
1262 | "Takes an optional file parameter."), &maintenanceprintlist); | |
af030b9a | 1263 | add_cmd ("raw-registers", class_maintenance, |
3e43a32a MS |
1264 | maintenance_print_raw_registers, |
1265 | _("Print the internal register configuration " | |
1266 | "including raw values.\n" | |
1267 | "Takes an optional file parameter."), &maintenanceprintlist); | |
af030b9a | 1268 | add_cmd ("cooked-registers", class_maintenance, |
3e43a32a MS |
1269 | maintenance_print_cooked_registers, |
1270 | _("Print the internal register configuration " | |
1271 | "including cooked values.\n" | |
1272 | "Takes an optional file parameter."), &maintenanceprintlist); | |
b59ff9d5 | 1273 | add_cmd ("register-groups", class_maintenance, |
3e43a32a MS |
1274 | maintenance_print_register_groups, |
1275 | _("Print the internal register configuration " | |
1276 | "including each register's group.\n" | |
1277 | "Takes an optional file parameter."), | |
af030b9a AC |
1278 | &maintenanceprintlist); |
1279 | ||
32178cab | 1280 | } |