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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
e2882c85 | 3 | Copyright (C) 1986-2018 Free Software Foundation, Inc. |
32178cab MS |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
32178cab MS |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
32178cab MS |
19 | |
20 | #include "defs.h" | |
32178cab | 21 | #include "inferior.h" |
00431a78 | 22 | #include "gdbthread.h" |
32178cab MS |
23 | #include "target.h" |
24 | #include "gdbarch.h" | |
705152c5 | 25 | #include "gdbcmd.h" |
4e052eda | 26 | #include "regcache.h" |
b59ff9d5 | 27 | #include "reggroups.h" |
76727919 | 28 | #include "observable.h" |
0b309272 | 29 | #include "regset.h" |
94bb8dfe | 30 | #include <forward_list> |
32178cab MS |
31 | |
32 | /* | |
33 | * DATA STRUCTURE | |
34 | * | |
35 | * Here is the actual register cache. | |
36 | */ | |
37 | ||
3fadccb3 | 38 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 39 | Computed once when the architecture is created. */ |
3fadccb3 AC |
40 | |
41 | struct gdbarch_data *regcache_descr_handle; | |
42 | ||
43 | struct regcache_descr | |
44 | { | |
45 | /* The architecture this descriptor belongs to. */ | |
46 | struct gdbarch *gdbarch; | |
47 | ||
bb1db049 AC |
48 | /* The raw register cache. Each raw (or hard) register is supplied |
49 | by the target interface. The raw cache should not contain | |
50 | redundant information - if the PC is constructed from two | |
d2f0b918 | 51 | registers then those registers and not the PC lives in the raw |
bb1db049 | 52 | cache. */ |
3fadccb3 | 53 | long sizeof_raw_registers; |
3fadccb3 | 54 | |
d138e37a AC |
55 | /* The cooked register space. Each cooked register in the range |
56 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
57 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 58 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 59 | both raw registers and memory by the architecture methods |
02f60eae | 60 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 61 | int nr_cooked_registers; |
067df2e5 | 62 | long sizeof_cooked_registers; |
d138e37a | 63 | |
86d31898 | 64 | /* Offset and size (in 8 bit bytes), of each register in the |
d138e37a | 65 | register cache. All registers (including those in the range |
99e42fd8 PA |
66 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
67 | offset. */ | |
3fadccb3 | 68 | long *register_offset; |
3fadccb3 | 69 | long *sizeof_register; |
3fadccb3 | 70 | |
bb425013 AC |
71 | /* Cached table containing the type of each register. */ |
72 | struct type **register_type; | |
3fadccb3 AC |
73 | }; |
74 | ||
3fadccb3 AC |
75 | static void * |
76 | init_regcache_descr (struct gdbarch *gdbarch) | |
77 | { | |
78 | int i; | |
79 | struct regcache_descr *descr; | |
80 | gdb_assert (gdbarch != NULL); | |
81 | ||
bb425013 | 82 | /* Create an initial, zero filled, table. */ |
116f06ea | 83 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 84 | descr->gdbarch = gdbarch; |
3fadccb3 | 85 | |
d138e37a AC |
86 | /* Total size of the register space. The raw registers are mapped |
87 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 88 | either mapped onto raw-registers or memory. */ |
f6efe3f8 | 89 | descr->nr_cooked_registers = gdbarch_num_cooked_regs (gdbarch); |
3fadccb3 | 90 | |
bb425013 | 91 | /* Fill in a table of register types. */ |
116f06ea | 92 | descr->register_type |
3e43a32a MS |
93 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
94 | struct type *); | |
bb425013 | 95 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 96 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 97 | |
bb1db049 AC |
98 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
99 | into the register cache. */ | |
bb1db049 | 100 | |
067df2e5 | 101 | /* Lay out the register cache. |
3fadccb3 | 102 | |
bb425013 AC |
103 | NOTE: cagney/2002-05-22: Only register_type() is used when |
104 | constructing the register cache. It is assumed that the | |
105 | register's raw size, virtual size and type length are all the | |
106 | same. */ | |
3fadccb3 AC |
107 | |
108 | { | |
109 | long offset = 0; | |
123f5f96 | 110 | |
116f06ea AC |
111 | descr->sizeof_register |
112 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
113 | descr->register_offset | |
114 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
d999647b | 115 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
99e42fd8 PA |
116 | { |
117 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); | |
118 | descr->register_offset[i] = offset; | |
119 | offset += descr->sizeof_register[i]; | |
99e42fd8 PA |
120 | } |
121 | /* Set the real size of the raw register cache buffer. */ | |
122 | descr->sizeof_raw_registers = offset; | |
123 | ||
124 | for (; i < descr->nr_cooked_registers; i++) | |
3fadccb3 | 125 | { |
bb425013 | 126 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
127 | descr->register_offset[i] = offset; |
128 | offset += descr->sizeof_register[i]; | |
3fadccb3 | 129 | } |
99e42fd8 | 130 | /* Set the real size of the readonly register cache buffer. */ |
067df2e5 | 131 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
132 | } |
133 | ||
3fadccb3 AC |
134 | return descr; |
135 | } | |
136 | ||
137 | static struct regcache_descr * | |
138 | regcache_descr (struct gdbarch *gdbarch) | |
139 | { | |
19ba03f4 SM |
140 | return (struct regcache_descr *) gdbarch_data (gdbarch, |
141 | regcache_descr_handle); | |
3fadccb3 AC |
142 | } |
143 | ||
bb425013 AC |
144 | /* Utility functions returning useful register attributes stored in |
145 | the regcache descr. */ | |
146 | ||
147 | struct type * | |
148 | register_type (struct gdbarch *gdbarch, int regnum) | |
149 | { | |
150 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
123f5f96 | 151 | |
bb425013 AC |
152 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
153 | return descr->register_type[regnum]; | |
154 | } | |
155 | ||
0ed04cce AC |
156 | /* Utility functions returning useful register attributes stored in |
157 | the regcache descr. */ | |
158 | ||
08a617da AC |
159 | int |
160 | register_size (struct gdbarch *gdbarch, int regnum) | |
161 | { | |
162 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
163 | int size; | |
123f5f96 | 164 | |
f6efe3f8 | 165 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_cooked_regs (gdbarch)); |
08a617da | 166 | size = descr->sizeof_register[regnum]; |
08a617da AC |
167 | return size; |
168 | } | |
169 | ||
8d689ee5 YQ |
170 | /* See common/common-regcache.h. */ |
171 | ||
172 | int | |
173 | regcache_register_size (const struct regcache *regcache, int n) | |
174 | { | |
ac7936df | 175 | return register_size (regcache->arch (), n); |
8d689ee5 YQ |
176 | } |
177 | ||
31716595 YQ |
178 | reg_buffer::reg_buffer (gdbarch *gdbarch, bool has_pseudo) |
179 | : m_has_pseudo (has_pseudo) | |
3fadccb3 | 180 | { |
ef79d9a3 YQ |
181 | gdb_assert (gdbarch != NULL); |
182 | m_descr = regcache_descr (gdbarch); | |
4621115f | 183 | |
31716595 | 184 | if (has_pseudo) |
4621115f | 185 | { |
835dcf92 SM |
186 | m_registers.reset (new gdb_byte[m_descr->sizeof_cooked_registers] ()); |
187 | m_register_status.reset | |
188 | (new register_status[m_descr->nr_cooked_registers] ()); | |
4621115f YQ |
189 | } |
190 | else | |
191 | { | |
835dcf92 SM |
192 | m_registers.reset (new gdb_byte[m_descr->sizeof_raw_registers] ()); |
193 | m_register_status.reset | |
194 | (new register_status[gdbarch_num_regs (gdbarch)] ()); | |
4621115f | 195 | } |
31716595 YQ |
196 | } |
197 | ||
796bb026 YQ |
198 | regcache::regcache (gdbarch *gdbarch, const address_space *aspace_) |
199 | /* The register buffers. A read/write register cache can only hold | |
200 | [0 .. gdbarch_num_regs). */ | |
201 | : detached_regcache (gdbarch, false), m_aspace (aspace_) | |
31716595 | 202 | { |
ef79d9a3 YQ |
203 | m_ptid = minus_one_ptid; |
204 | } | |
4621115f | 205 | |
302abd6e SM |
206 | readonly_detached_regcache::readonly_detached_regcache (regcache &src) |
207 | : readonly_detached_regcache (src.arch (), | |
208 | [&src] (int regnum, gdb_byte *buf) | |
209 | { | |
210 | return src.cooked_read (regnum, buf); | |
211 | }) | |
daf6667d YQ |
212 | { |
213 | } | |
214 | ||
ef79d9a3 | 215 | gdbarch * |
31716595 | 216 | reg_buffer::arch () const |
ef79d9a3 YQ |
217 | { |
218 | return m_descr->gdbarch; | |
219 | } | |
3fadccb3 | 220 | |
b292235f | 221 | /* Cleanup class for invalidating a register. */ |
b94ade42 | 222 | |
b292235f | 223 | class regcache_invalidator |
b94ade42 | 224 | { |
b292235f | 225 | public: |
b94ade42 | 226 | |
b292235f TT |
227 | regcache_invalidator (struct regcache *regcache, int regnum) |
228 | : m_regcache (regcache), | |
229 | m_regnum (regnum) | |
230 | { | |
231 | } | |
b94ade42 | 232 | |
b292235f TT |
233 | ~regcache_invalidator () |
234 | { | |
235 | if (m_regcache != nullptr) | |
6aa7d724 | 236 | m_regcache->invalidate (m_regnum); |
b292235f | 237 | } |
b94ade42 | 238 | |
b292235f | 239 | DISABLE_COPY_AND_ASSIGN (regcache_invalidator); |
b94ade42 | 240 | |
b292235f TT |
241 | void release () |
242 | { | |
243 | m_regcache = nullptr; | |
244 | } | |
245 | ||
246 | private: | |
247 | ||
248 | struct regcache *m_regcache; | |
249 | int m_regnum; | |
250 | }; | |
b94ade42 | 251 | |
51b1fe4e AC |
252 | /* Return a pointer to register REGNUM's buffer cache. */ |
253 | ||
ef79d9a3 | 254 | gdb_byte * |
31716595 | 255 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 256 | { |
835dcf92 | 257 | return m_registers.get () + m_descr->register_offset[regnum]; |
51b1fe4e AC |
258 | } |
259 | ||
ef79d9a3 | 260 | void |
302abd6e | 261 | reg_buffer::save (register_read_ftype cooked_read) |
ef79d9a3 YQ |
262 | { |
263 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 264 | int regnum; |
123f5f96 | 265 | |
daf6667d YQ |
266 | /* It should have pseudo registers. */ |
267 | gdb_assert (m_has_pseudo); | |
2d28509a | 268 | /* Clear the dest. */ |
835dcf92 SM |
269 | memset (m_registers.get (), 0, m_descr->sizeof_cooked_registers); |
270 | memset (m_register_status.get (), REG_UNKNOWN, m_descr->nr_cooked_registers); | |
2d28509a | 271 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
272 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
273 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 274 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 275 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
276 | { |
277 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
278 | { | |
50d6adef | 279 | gdb_byte *dst_buf = register_buffer (regnum); |
302abd6e | 280 | enum register_status status = cooked_read (regnum, dst_buf); |
123f5f96 | 281 | |
50d6adef AH |
282 | gdb_assert (status != REG_UNKNOWN); |
283 | ||
284 | if (status != REG_VALID) | |
285 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 286 | |
ef79d9a3 | 287 | m_register_status[regnum] = status; |
2d28509a AC |
288 | } |
289 | } | |
290 | } | |
291 | ||
ef79d9a3 | 292 | void |
daf6667d | 293 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 294 | { |
ef79d9a3 | 295 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 296 | int regnum; |
123f5f96 | 297 | |
fc5b8736 | 298 | gdb_assert (src != NULL); |
daf6667d | 299 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
300 | |
301 | gdb_assert (gdbarch == src->arch ()); | |
302 | ||
2d28509a | 303 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
304 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
305 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 306 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 307 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 308 | { |
5602984a | 309 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 310 | { |
ef79d9a3 YQ |
311 | if (src->m_register_status[regnum] == REG_VALID) |
312 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
313 | } |
314 | } | |
315 | } | |
316 | ||
9c861883 AH |
317 | /* See common/common-regcache.h. */ |
318 | ||
ef79d9a3 | 319 | enum register_status |
c8ec2f33 | 320 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 321 | { |
c8ec2f33 | 322 | assert_regnum (regnum); |
6ed7ea50 | 323 | |
aac0d564 | 324 | return m_register_status[regnum]; |
3fadccb3 AC |
325 | } |
326 | ||
ef79d9a3 | 327 | void |
9c861883 | 328 | reg_buffer::invalidate (int regnum) |
ef79d9a3 | 329 | { |
4e888c28 | 330 | assert_regnum (regnum); |
ef79d9a3 YQ |
331 | m_register_status[regnum] = REG_UNKNOWN; |
332 | } | |
9c5ea4d9 | 333 | |
4e888c28 | 334 | void |
31716595 | 335 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 336 | { |
31716595 YQ |
337 | gdb_assert (regnum >= 0); |
338 | if (m_has_pseudo) | |
339 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
340 | else | |
341 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
342 | } |
343 | ||
3fadccb3 | 344 | /* Global structure containing the current regcache. */ |
3fadccb3 | 345 | |
5ebd2499 | 346 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
347 | recording if the register values have been changed (eg. by the |
348 | user). Therefore all registers must be written back to the | |
349 | target when appropriate. */ | |
e521e87e | 350 | std::forward_list<regcache *> regcache::current_regcache; |
c2250ad1 UW |
351 | |
352 | struct regcache * | |
e2d96639 YQ |
353 | get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch, |
354 | struct address_space *aspace) | |
c2250ad1 | 355 | { |
e521e87e | 356 | for (const auto ®cache : regcache::current_regcache) |
d7e15655 | 357 | if (regcache->ptid () == ptid && regcache->arch () == gdbarch) |
94bb8dfe | 358 | return regcache; |
594f7785 | 359 | |
796bb026 | 360 | regcache *new_regcache = new regcache (gdbarch, aspace); |
594f7785 | 361 | |
e521e87e | 362 | regcache::current_regcache.push_front (new_regcache); |
ef79d9a3 | 363 | new_regcache->set_ptid (ptid); |
e2d96639 | 364 | |
e2d96639 YQ |
365 | return new_regcache; |
366 | } | |
367 | ||
368 | struct regcache * | |
369 | get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) | |
370 | { | |
ed4227b7 | 371 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 372 | |
e2d96639 | 373 | return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace); |
594f7785 UW |
374 | } |
375 | ||
c2250ad1 UW |
376 | static ptid_t current_thread_ptid; |
377 | static struct gdbarch *current_thread_arch; | |
378 | ||
379 | struct regcache * | |
380 | get_thread_regcache (ptid_t ptid) | |
381 | { | |
d7e15655 | 382 | if (!current_thread_arch || current_thread_ptid != ptid) |
c2250ad1 UW |
383 | { |
384 | current_thread_ptid = ptid; | |
385 | current_thread_arch = target_thread_architecture (ptid); | |
386 | } | |
387 | ||
388 | return get_thread_arch_regcache (ptid, current_thread_arch); | |
389 | } | |
390 | ||
00431a78 PA |
391 | /* See regcache.h. */ |
392 | ||
393 | struct regcache * | |
394 | get_thread_regcache (thread_info *thread) | |
395 | { | |
396 | return get_thread_regcache (thread->ptid); | |
397 | } | |
398 | ||
c2250ad1 UW |
399 | struct regcache * |
400 | get_current_regcache (void) | |
594f7785 | 401 | { |
00431a78 | 402 | return get_thread_regcache (inferior_thread ()); |
594f7785 | 403 | } |
32178cab | 404 | |
361c8ade GB |
405 | /* See common/common-regcache.h. */ |
406 | ||
407 | struct regcache * | |
408 | get_thread_regcache_for_ptid (ptid_t ptid) | |
409 | { | |
410 | return get_thread_regcache (ptid); | |
411 | } | |
32178cab | 412 | |
f4c5303c OF |
413 | /* Observer for the target_changed event. */ |
414 | ||
2c0b251b | 415 | static void |
f4c5303c OF |
416 | regcache_observer_target_changed (struct target_ops *target) |
417 | { | |
418 | registers_changed (); | |
419 | } | |
420 | ||
5231c1fd PA |
421 | /* Update global variables old ptids to hold NEW_PTID if they were |
422 | holding OLD_PTID. */ | |
e521e87e YQ |
423 | void |
424 | regcache::regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) | |
5231c1fd | 425 | { |
e521e87e | 426 | for (auto ®cache : regcache::current_regcache) |
94bb8dfe | 427 | { |
d7e15655 | 428 | if (regcache->ptid () == old_ptid) |
94bb8dfe YQ |
429 | regcache->set_ptid (new_ptid); |
430 | } | |
5231c1fd PA |
431 | } |
432 | ||
32178cab MS |
433 | /* Low level examining and depositing of registers. |
434 | ||
435 | The caller is responsible for making sure that the inferior is | |
436 | stopped before calling the fetching routines, or it will get | |
437 | garbage. (a change from GDB version 3, in which the caller got the | |
438 | value from the last stop). */ | |
439 | ||
440 | /* REGISTERS_CHANGED () | |
441 | ||
442 | Indicate that registers may have changed, so invalidate the cache. */ | |
443 | ||
444 | void | |
e66408ed | 445 | registers_changed_ptid (ptid_t ptid) |
32178cab | 446 | { |
e521e87e | 447 | for (auto oit = regcache::current_regcache.before_begin (), |
94bb8dfe | 448 | it = std::next (oit); |
e521e87e | 449 | it != regcache::current_regcache.end (); |
94bb8dfe | 450 | ) |
c2250ad1 | 451 | { |
26a57c92 | 452 | if ((*it)->ptid ().matches (ptid)) |
e66408ed | 453 | { |
94bb8dfe | 454 | delete *it; |
e521e87e | 455 | it = regcache::current_regcache.erase_after (oit); |
e66408ed | 456 | } |
94bb8dfe YQ |
457 | else |
458 | oit = it++; | |
c2250ad1 | 459 | } |
32178cab | 460 | |
26a57c92 | 461 | if (current_thread_ptid.matches (ptid)) |
041274d8 PA |
462 | { |
463 | current_thread_ptid = null_ptid; | |
464 | current_thread_arch = NULL; | |
465 | } | |
32178cab | 466 | |
26a57c92 | 467 | if (inferior_ptid.matches (ptid)) |
041274d8 PA |
468 | { |
469 | /* We just deleted the regcache of the current thread. Need to | |
470 | forget about any frames we have cached, too. */ | |
471 | reinit_frame_cache (); | |
472 | } | |
473 | } | |
c2250ad1 | 474 | |
00431a78 PA |
475 | /* See regcache.h. */ |
476 | ||
477 | void | |
478 | registers_changed_thread (thread_info *thread) | |
479 | { | |
480 | registers_changed_ptid (thread->ptid); | |
481 | } | |
482 | ||
041274d8 PA |
483 | void |
484 | registers_changed (void) | |
485 | { | |
486 | registers_changed_ptid (minus_one_ptid); | |
a5d9d57d | 487 | |
32178cab MS |
488 | /* Force cleanup of any alloca areas if using C alloca instead of |
489 | a builtin alloca. This particular call is used to clean up | |
490 | areas allocated by low level target code which may build up | |
491 | during lengthy interactions between gdb and the target before | |
492 | gdb gives control to the user (ie watchpoints). */ | |
493 | alloca (0); | |
32178cab MS |
494 | } |
495 | ||
ef79d9a3 YQ |
496 | void |
497 | regcache::raw_update (int regnum) | |
498 | { | |
4e888c28 | 499 | assert_regnum (regnum); |
8e368124 | 500 | |
3fadccb3 AC |
501 | /* Make certain that the register cache is up-to-date with respect |
502 | to the current thread. This switching shouldn't be necessary | |
503 | only there is still only one target side register cache. Sigh! | |
504 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 505 | |
796bb026 | 506 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 507 | { |
ef79d9a3 | 508 | target_fetch_registers (this, regnum); |
788c8b10 PA |
509 | |
510 | /* A number of targets can't access the whole set of raw | |
511 | registers (because the debug API provides no means to get at | |
512 | them). */ | |
ef79d9a3 YQ |
513 | if (m_register_status[regnum] == REG_UNKNOWN) |
514 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 515 | } |
8e368124 AH |
516 | } |
517 | ||
ef79d9a3 | 518 | enum register_status |
849d0ba8 | 519 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
520 | { |
521 | gdb_assert (buf != NULL); | |
ef79d9a3 | 522 | raw_update (regnum); |
05d1431c | 523 | |
ef79d9a3 YQ |
524 | if (m_register_status[regnum] != REG_VALID) |
525 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 526 | else |
ef79d9a3 YQ |
527 | memcpy (buf, register_buffer (regnum), |
528 | m_descr->sizeof_register[regnum]); | |
05d1431c | 529 | |
aac0d564 | 530 | return m_register_status[regnum]; |
61a0eb5b AC |
531 | } |
532 | ||
05d1431c | 533 | enum register_status |
28fc6740 | 534 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
535 | { |
536 | gdb_assert (regcache != NULL); | |
6f98355c | 537 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
538 | } |
539 | ||
6f98355c | 540 | template<typename T, typename> |
ef79d9a3 | 541 | enum register_status |
849d0ba8 | 542 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 543 | { |
2d522557 | 544 | gdb_byte *buf; |
05d1431c | 545 | enum register_status status; |
123f5f96 | 546 | |
4e888c28 | 547 | assert_regnum (regnum); |
ef79d9a3 YQ |
548 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
549 | status = raw_read (regnum, buf); | |
05d1431c | 550 | if (status == REG_VALID) |
6f98355c YQ |
551 | *val = extract_integer<T> (buf, |
552 | m_descr->sizeof_register[regnum], | |
553 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
554 | else |
555 | *val = 0; | |
556 | return status; | |
28fc6740 AC |
557 | } |
558 | ||
05d1431c | 559 | enum register_status |
28fc6740 AC |
560 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
561 | ULONGEST *val) | |
ef79d9a3 YQ |
562 | { |
563 | gdb_assert (regcache != NULL); | |
6f98355c | 564 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
565 | } |
566 | ||
c00dcbe9 MK |
567 | void |
568 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
569 | { |
570 | gdb_assert (regcache != NULL); | |
6f98355c | 571 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
572 | } |
573 | ||
6f98355c | 574 | template<typename T, typename> |
ef79d9a3 | 575 | void |
6f98355c | 576 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 577 | { |
7c543f7b | 578 | gdb_byte *buf; |
123f5f96 | 579 | |
4e888c28 | 580 | assert_regnum (regnum); |
ef79d9a3 | 581 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
582 | store_integer (buf, m_descr->sizeof_register[regnum], |
583 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 584 | raw_write (regnum, buf); |
c00dcbe9 MK |
585 | } |
586 | ||
587 | void | |
588 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
589 | ULONGEST val) | |
ef79d9a3 YQ |
590 | { |
591 | gdb_assert (regcache != NULL); | |
6f98355c | 592 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
593 | } |
594 | ||
9fd15b2e YQ |
595 | LONGEST |
596 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
597 | { | |
598 | LONGEST value; | |
599 | enum register_status status; | |
600 | ||
601 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
602 | if (status == REG_UNAVAILABLE) | |
603 | throw_error (NOT_AVAILABLE_ERROR, | |
604 | _("Register %d is not available"), regnum); | |
605 | return value; | |
606 | } | |
607 | ||
ef79d9a3 | 608 | enum register_status |
849d0ba8 | 609 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 610 | { |
d138e37a | 611 | gdb_assert (regnum >= 0); |
ef79d9a3 | 612 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 613 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 614 | return raw_read (regnum, buf); |
849d0ba8 | 615 | else if (m_has_pseudo |
ef79d9a3 | 616 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 617 | { |
ef79d9a3 YQ |
618 | if (m_register_status[regnum] == REG_VALID) |
619 | memcpy (buf, register_buffer (regnum), | |
620 | m_descr->sizeof_register[regnum]); | |
05d1431c | 621 | else |
ef79d9a3 | 622 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 623 | |
aac0d564 | 624 | return m_register_status[regnum]; |
05d1431c | 625 | } |
ef79d9a3 | 626 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
627 | { |
628 | struct value *mark, *computed; | |
629 | enum register_status result = REG_VALID; | |
630 | ||
631 | mark = value_mark (); | |
632 | ||
ef79d9a3 YQ |
633 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
634 | this, regnum); | |
3543a589 TT |
635 | if (value_entirely_available (computed)) |
636 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 637 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
638 | else |
639 | { | |
ef79d9a3 | 640 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
641 | result = REG_UNAVAILABLE; |
642 | } | |
643 | ||
644 | value_free_to_mark (mark); | |
645 | ||
646 | return result; | |
647 | } | |
d138e37a | 648 | else |
ef79d9a3 | 649 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 650 | regnum, buf); |
61a0eb5b AC |
651 | } |
652 | ||
ef79d9a3 | 653 | struct value * |
849d0ba8 | 654 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
655 | { |
656 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 657 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 658 | |
d999647b | 659 | if (regnum < num_raw_registers () |
849d0ba8 | 660 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 661 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
662 | { |
663 | struct value *result; | |
664 | ||
ef79d9a3 | 665 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
666 | VALUE_LVAL (result) = lval_register; |
667 | VALUE_REGNUM (result) = regnum; | |
668 | ||
669 | /* It is more efficient in general to do this delegation in this | |
670 | direction than in the other one, even though the value-based | |
671 | API is preferred. */ | |
ef79d9a3 YQ |
672 | if (cooked_read (regnum, |
673 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
674 | mark_value_bytes_unavailable (result, 0, |
675 | TYPE_LENGTH (value_type (result))); | |
676 | ||
677 | return result; | |
678 | } | |
679 | else | |
ef79d9a3 YQ |
680 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
681 | this, regnum); | |
3543a589 TT |
682 | } |
683 | ||
05d1431c | 684 | enum register_status |
a378f419 AC |
685 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
686 | LONGEST *val) | |
ef79d9a3 YQ |
687 | { |
688 | gdb_assert (regcache != NULL); | |
6f98355c | 689 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
690 | } |
691 | ||
6f98355c | 692 | template<typename T, typename> |
ef79d9a3 | 693 | enum register_status |
849d0ba8 | 694 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 695 | { |
05d1431c | 696 | enum register_status status; |
2d522557 | 697 | gdb_byte *buf; |
123f5f96 | 698 | |
ef79d9a3 YQ |
699 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
700 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
701 | status = cooked_read (regnum, buf); | |
05d1431c | 702 | if (status == REG_VALID) |
6f98355c YQ |
703 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
704 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
705 | else |
706 | *val = 0; | |
707 | return status; | |
a378f419 AC |
708 | } |
709 | ||
05d1431c | 710 | enum register_status |
a378f419 AC |
711 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
712 | ULONGEST *val) | |
ef79d9a3 YQ |
713 | { |
714 | gdb_assert (regcache != NULL); | |
6f98355c | 715 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
716 | } |
717 | ||
a66a9c23 AC |
718 | void |
719 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
720 | LONGEST val) | |
ef79d9a3 YQ |
721 | { |
722 | gdb_assert (regcache != NULL); | |
6f98355c | 723 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
724 | } |
725 | ||
6f98355c | 726 | template<typename T, typename> |
ef79d9a3 | 727 | void |
6f98355c | 728 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 729 | { |
7c543f7b | 730 | gdb_byte *buf; |
123f5f96 | 731 | |
ef79d9a3 YQ |
732 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
733 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
734 | store_integer (buf, m_descr->sizeof_register[regnum], |
735 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 736 | cooked_write (regnum, buf); |
a66a9c23 AC |
737 | } |
738 | ||
739 | void | |
740 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
741 | ULONGEST val) | |
ef79d9a3 YQ |
742 | { |
743 | gdb_assert (regcache != NULL); | |
6f98355c | 744 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
745 | } |
746 | ||
ef79d9a3 YQ |
747 | void |
748 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 749 | { |
594f7785 | 750 | |
ef79d9a3 | 751 | gdb_assert (buf != NULL); |
4e888c28 | 752 | assert_regnum (regnum); |
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. */ | |
ef79d9a3 | 756 | if (gdbarch_cannot_store_register (arch (), 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. */ |
ef79d9a3 YQ |
761 | if (get_register_status (regnum) == REG_VALID |
762 | && (memcmp (register_buffer (regnum), buf, | |
763 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
764 | return; |
765 | ||
ef79d9a3 | 766 | target_prepare_to_store (this); |
c8ec2f33 | 767 | raw_supply (regnum, buf); |
b94ade42 | 768 | |
b292235f TT |
769 | /* Invalidate the register after it is written, in case of a |
770 | failure. */ | |
771 | regcache_invalidator invalidator (this, regnum); | |
b94ade42 | 772 | |
ef79d9a3 | 773 | target_store_registers (this, regnum); |
594f7785 | 774 | |
b292235f TT |
775 | /* The target did not throw an error so we can discard invalidating |
776 | the register. */ | |
777 | invalidator.release (); | |
61a0eb5b AC |
778 | } |
779 | ||
ef79d9a3 YQ |
780 | void |
781 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 782 | { |
d138e37a | 783 | gdb_assert (regnum >= 0); |
ef79d9a3 | 784 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 785 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 786 | raw_write (regnum, buf); |
d138e37a | 787 | else |
ef79d9a3 | 788 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 789 | regnum, buf); |
61a0eb5b AC |
790 | } |
791 | ||
33bab475 | 792 | /* See regcache.h. */ |
06c0b04e | 793 | |
ef79d9a3 | 794 | enum register_status |
33bab475 AH |
795 | readable_regcache::read_part (int regnum, int offset, int len, |
796 | gdb_byte *out, bool is_raw) | |
849d0ba8 | 797 | { |
33bab475 AH |
798 | int reg_size = register_size (arch (), regnum); |
799 | ||
800 | gdb_assert (out != NULL); | |
8e7767e3 AH |
801 | gdb_assert (offset >= 0 && offset <= reg_size); |
802 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
803 | |
804 | if (offset == 0 && len == 0) | |
805 | { | |
806 | /* Nothing to do. */ | |
807 | return REG_VALID; | |
808 | } | |
809 | ||
810 | if (offset == 0 && len == reg_size) | |
811 | { | |
812 | /* Read the full register. */ | |
813 | return (is_raw) ? raw_read (regnum, out) : cooked_read (regnum, out); | |
814 | } | |
849d0ba8 | 815 | |
849d0ba8 | 816 | enum register_status status; |
33bab475 | 817 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); |
849d0ba8 | 818 | |
33bab475 AH |
819 | /* Read full register to buffer. */ |
820 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
849d0ba8 YQ |
821 | if (status != REG_VALID) |
822 | return status; | |
823 | ||
33bab475 AH |
824 | /* Copy out. */ |
825 | memcpy (out, reg + offset, len); | |
849d0ba8 YQ |
826 | return REG_VALID; |
827 | } | |
828 | ||
33bab475 AH |
829 | /* See regcache.h. */ |
830 | ||
8e7767e3 AH |
831 | void |
832 | reg_buffer::raw_collect_part (int regnum, int offset, int len, | |
833 | gdb_byte *out) const | |
834 | { | |
835 | int reg_size = register_size (arch (), regnum); | |
836 | ||
837 | gdb_assert (out != nullptr); | |
838 | gdb_assert (offset >= 0 && offset <= reg_size); | |
839 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
840 | ||
841 | if (offset == 0 && len == 0) | |
842 | { | |
843 | /* Nothing to do. */ | |
844 | return; | |
845 | } | |
846 | ||
847 | if (offset == 0 && len == reg_size) | |
848 | { | |
849 | /* Collect the full register. */ | |
850 | return raw_collect (regnum, out); | |
851 | } | |
852 | ||
853 | /* Read to buffer, then write out. */ | |
854 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
855 | raw_collect (regnum, reg); | |
856 | memcpy (out, reg + offset, len); | |
857 | } | |
858 | ||
859 | /* See regcache.h. */ | |
860 | ||
849d0ba8 YQ |
861 | enum register_status |
862 | regcache::write_part (int regnum, int offset, int len, | |
33bab475 | 863 | const gdb_byte *in, bool is_raw) |
ef79d9a3 | 864 | { |
33bab475 | 865 | int reg_size = register_size (arch (), regnum); |
123f5f96 | 866 | |
33bab475 | 867 | gdb_assert (in != NULL); |
8e7767e3 AH |
868 | gdb_assert (offset >= 0 && offset <= reg_size); |
869 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
870 | |
871 | if (offset == 0 && len == 0) | |
06c0b04e | 872 | { |
33bab475 AH |
873 | /* Nothing to do. */ |
874 | return REG_VALID; | |
875 | } | |
05d1431c | 876 | |
33bab475 AH |
877 | if (offset == 0 && len == reg_size) |
878 | { | |
879 | /* Write the full register. */ | |
880 | (is_raw) ? raw_write (regnum, in) : cooked_write (regnum, in); | |
881 | return REG_VALID; | |
06c0b04e | 882 | } |
849d0ba8 | 883 | |
33bab475 AH |
884 | enum register_status status; |
885 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
05d1431c | 886 | |
33bab475 AH |
887 | /* Read existing register to buffer. */ |
888 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
889 | if (status != REG_VALID) | |
890 | return status; | |
891 | ||
892 | /* Update buffer, then write back to regcache. */ | |
893 | memcpy (reg + offset, in, len); | |
894 | is_raw ? raw_write (regnum, reg) : cooked_write (regnum, reg); | |
05d1431c | 895 | return REG_VALID; |
06c0b04e AC |
896 | } |
897 | ||
33bab475 AH |
898 | /* See regcache.h. */ |
899 | ||
8e7767e3 AH |
900 | void |
901 | reg_buffer::raw_supply_part (int regnum, int offset, int len, | |
902 | const gdb_byte *in) | |
903 | { | |
904 | int reg_size = register_size (arch (), regnum); | |
905 | ||
906 | gdb_assert (in != nullptr); | |
907 | gdb_assert (offset >= 0 && offset <= reg_size); | |
908 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
909 | ||
910 | if (offset == 0 && len == 0) | |
911 | { | |
912 | /* Nothing to do. */ | |
913 | return; | |
914 | } | |
915 | ||
916 | if (offset == 0 && len == reg_size) | |
917 | { | |
918 | /* Supply the full register. */ | |
919 | return raw_supply (regnum, in); | |
920 | } | |
921 | ||
922 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
923 | ||
924 | /* Read existing value to buffer. */ | |
925 | raw_collect (regnum, reg); | |
926 | ||
927 | /* Write to buffer, then write out. */ | |
928 | memcpy (reg + offset, in, len); | |
929 | raw_supply (regnum, reg); | |
930 | } | |
931 | ||
ef79d9a3 | 932 | enum register_status |
33bab475 AH |
933 | readable_regcache::raw_read_part (int regnum, int offset, int len, |
934 | gdb_byte *buf) | |
ef79d9a3 | 935 | { |
4e888c28 | 936 | assert_regnum (regnum); |
849d0ba8 | 937 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
938 | } |
939 | ||
4f0420fd | 940 | /* See regcache.h. */ |
123f5f96 | 941 | |
ef79d9a3 YQ |
942 | void |
943 | regcache::raw_write_part (int regnum, int offset, int len, | |
944 | const gdb_byte *buf) | |
945 | { | |
4e888c28 | 946 | assert_regnum (regnum); |
849d0ba8 | 947 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
948 | } |
949 | ||
33bab475 AH |
950 | /* See regcache.h. */ |
951 | ||
ef79d9a3 | 952 | enum register_status |
849d0ba8 YQ |
953 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
954 | gdb_byte *buf) | |
ef79d9a3 YQ |
955 | { |
956 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 957 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
958 | } |
959 | ||
33bab475 AH |
960 | /* See regcache.h. */ |
961 | ||
ef79d9a3 YQ |
962 | void |
963 | regcache::cooked_write_part (int regnum, int offset, int len, | |
964 | const gdb_byte *buf) | |
965 | { | |
966 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 967 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 968 | } |
32178cab | 969 | |
9c861883 AH |
970 | /* See common/common-regcache.h. */ |
971 | ||
ef79d9a3 | 972 | void |
9c861883 | 973 | reg_buffer::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
974 | { |
975 | void *regbuf; | |
976 | size_t size; | |
977 | ||
4e888c28 | 978 | assert_regnum (regnum); |
9a661b68 | 979 | |
ef79d9a3 YQ |
980 | regbuf = register_buffer (regnum); |
981 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
982 | |
983 | if (buf) | |
ee99023e PA |
984 | { |
985 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 986 | m_register_status[regnum] = REG_VALID; |
ee99023e | 987 | } |
9a661b68 | 988 | else |
ee99023e PA |
989 | { |
990 | /* This memset not strictly necessary, but better than garbage | |
991 | in case the register value manages to escape somewhere (due | |
992 | to a bug, no less). */ | |
993 | memset (regbuf, 0, size); | |
ef79d9a3 | 994 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 995 | } |
9a661b68 MK |
996 | } |
997 | ||
9c861883 | 998 | /* See regcache.h. */ |
b057297a AH |
999 | |
1000 | void | |
9c861883 AH |
1001 | reg_buffer::raw_supply_integer (int regnum, const gdb_byte *addr, |
1002 | int addr_len, bool is_signed) | |
b057297a AH |
1003 | { |
1004 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1005 | gdb_byte *regbuf; | |
1006 | size_t regsize; | |
1007 | ||
4e888c28 | 1008 | assert_regnum (regnum); |
b057297a AH |
1009 | |
1010 | regbuf = register_buffer (regnum); | |
1011 | regsize = m_descr->sizeof_register[regnum]; | |
1012 | ||
1013 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
1014 | byte_order); | |
1015 | m_register_status[regnum] = REG_VALID; | |
1016 | } | |
1017 | ||
9c861883 | 1018 | /* See regcache.h. */ |
f81fdd35 AH |
1019 | |
1020 | void | |
9c861883 | 1021 | reg_buffer::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1022 | { |
1023 | void *regbuf; | |
1024 | size_t size; | |
1025 | ||
4e888c28 | 1026 | assert_regnum (regnum); |
f81fdd35 AH |
1027 | |
1028 | regbuf = register_buffer (regnum); | |
1029 | size = m_descr->sizeof_register[regnum]; | |
1030 | ||
1031 | memset (regbuf, 0, size); | |
1032 | m_register_status[regnum] = REG_VALID; | |
1033 | } | |
1034 | ||
9c861883 AH |
1035 | /* See common/common-regcache.h. */ |
1036 | ||
ef79d9a3 | 1037 | void |
9c861883 | 1038 | reg_buffer::raw_collect (int regnum, void *buf) const |
9a661b68 MK |
1039 | { |
1040 | const void *regbuf; | |
1041 | size_t size; | |
1042 | ||
ef79d9a3 | 1043 | gdb_assert (buf != NULL); |
4e888c28 | 1044 | assert_regnum (regnum); |
9a661b68 | 1045 | |
ef79d9a3 YQ |
1046 | regbuf = register_buffer (regnum); |
1047 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1048 | memcpy (buf, regbuf, size); |
1049 | } | |
1050 | ||
9c861883 | 1051 | /* See regcache.h. */ |
b057297a AH |
1052 | |
1053 | void | |
9c861883 AH |
1054 | reg_buffer::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
1055 | bool is_signed) const | |
b057297a AH |
1056 | { |
1057 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1058 | const gdb_byte *regbuf; | |
1059 | size_t regsize; | |
1060 | ||
4e888c28 | 1061 | assert_regnum (regnum); |
b057297a AH |
1062 | |
1063 | regbuf = register_buffer (regnum); | |
1064 | regsize = m_descr->sizeof_register[regnum]; | |
1065 | ||
1066 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
1067 | byte_order); | |
1068 | } | |
1069 | ||
8e7767e3 AH |
1070 | /* See regcache.h. */ |
1071 | ||
1072 | void | |
1073 | regcache::transfer_regset_register (struct regcache *out_regcache, int regnum, | |
1074 | const gdb_byte *in_buf, gdb_byte *out_buf, | |
1075 | int slot_size, int offs) const | |
1076 | { | |
1077 | struct gdbarch *gdbarch = arch (); | |
1078 | int reg_size = std::min (register_size (gdbarch, regnum), slot_size); | |
1079 | ||
1080 | /* Use part versions and reg_size to prevent possible buffer overflows when | |
1081 | accessing the regcache. */ | |
1082 | ||
1083 | if (out_buf != nullptr) | |
1084 | { | |
1085 | raw_collect_part (regnum, 0, reg_size, out_buf + offs); | |
1086 | ||
1087 | /* Ensure any additional space is cleared. */ | |
1088 | if (slot_size > reg_size) | |
1089 | memset (out_buf + offs + reg_size, 0, slot_size - reg_size); | |
1090 | } | |
1091 | else if (in_buf != nullptr) | |
1092 | out_regcache->raw_supply_part (regnum, 0, reg_size, in_buf + offs); | |
1093 | else | |
1094 | { | |
1095 | /* Invalidate the register. */ | |
1096 | out_regcache->raw_supply (regnum, nullptr); | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | /* See regcache.h. */ | |
9c861883 | 1101 | |
ef79d9a3 YQ |
1102 | void |
1103 | regcache::transfer_regset (const struct regset *regset, | |
1104 | struct regcache *out_regcache, | |
8e7767e3 AH |
1105 | int regnum, const gdb_byte *in_buf, |
1106 | gdb_byte *out_buf, size_t size) const | |
0b309272 AA |
1107 | { |
1108 | const struct regcache_map_entry *map; | |
1109 | int offs = 0, count; | |
1110 | ||
19ba03f4 SM |
1111 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1112 | (count = map->count) != 0; | |
1113 | map++) | |
0b309272 AA |
1114 | { |
1115 | int regno = map->regno; | |
1116 | int slot_size = map->size; | |
1117 | ||
1118 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1119 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1120 | |
1121 | if (regno == REGCACHE_MAP_SKIP | |
1122 | || (regnum != -1 | |
1123 | && (regnum < regno || regnum >= regno + count))) | |
1124 | offs += count * slot_size; | |
1125 | ||
1126 | else if (regnum == -1) | |
1127 | for (; count--; regno++, offs += slot_size) | |
1128 | { | |
1129 | if (offs + slot_size > size) | |
1130 | break; | |
1131 | ||
8e7767e3 AH |
1132 | transfer_regset_register (out_regcache, regno, in_buf, out_buf, |
1133 | slot_size, offs); | |
0b309272 AA |
1134 | } |
1135 | else | |
1136 | { | |
1137 | /* Transfer a single register and return. */ | |
1138 | offs += (regnum - regno) * slot_size; | |
1139 | if (offs + slot_size > size) | |
1140 | return; | |
1141 | ||
8e7767e3 AH |
1142 | transfer_regset_register (out_regcache, regnum, in_buf, out_buf, |
1143 | slot_size, offs); | |
0b309272 AA |
1144 | return; |
1145 | } | |
1146 | } | |
1147 | } | |
1148 | ||
1149 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1150 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1151 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1152 | ||
1153 | void | |
1154 | regcache_supply_regset (const struct regset *regset, | |
1155 | struct regcache *regcache, | |
1156 | int regnum, const void *buf, size_t size) | |
1157 | { | |
8e7767e3 | 1158 | regcache->supply_regset (regset, regnum, (const gdb_byte *) buf, size); |
ef79d9a3 YQ |
1159 | } |
1160 | ||
1161 | void | |
1162 | regcache::supply_regset (const struct regset *regset, | |
1163 | int regnum, const void *buf, size_t size) | |
1164 | { | |
8e7767e3 | 1165 | transfer_regset (regset, this, regnum, (const gdb_byte *) buf, nullptr, size); |
0b309272 AA |
1166 | } |
1167 | ||
1168 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1169 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1170 | REGSET. */ | |
1171 | ||
1172 | void | |
1173 | regcache_collect_regset (const struct regset *regset, | |
1174 | const struct regcache *regcache, | |
1175 | int regnum, void *buf, size_t size) | |
1176 | { | |
8e7767e3 | 1177 | regcache->collect_regset (regset, regnum, (gdb_byte *) buf, size); |
ef79d9a3 YQ |
1178 | } |
1179 | ||
1180 | void | |
1181 | regcache::collect_regset (const struct regset *regset, | |
1182 | int regnum, void *buf, size_t size) const | |
1183 | { | |
8e7767e3 | 1184 | transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size); |
0b309272 AA |
1185 | } |
1186 | ||
f868386e AH |
1187 | /* See common/common-regcache.h. */ |
1188 | ||
1189 | bool | |
1190 | reg_buffer::raw_compare (int regnum, const void *buf, int offset) const | |
1191 | { | |
1192 | gdb_assert (buf != NULL); | |
1193 | assert_regnum (regnum); | |
1194 | ||
1195 | const char *regbuf = (const char *) register_buffer (regnum); | |
1196 | size_t size = m_descr->sizeof_register[regnum]; | |
1197 | gdb_assert (size >= offset); | |
1198 | ||
1199 | return (memcmp (buf, regbuf + offset, size - offset) == 0); | |
1200 | } | |
193cb69f | 1201 | |
515630c5 | 1202 | /* Special handling for register PC. */ |
32178cab MS |
1203 | |
1204 | CORE_ADDR | |
515630c5 | 1205 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1206 | { |
ac7936df | 1207 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1208 | |
32178cab MS |
1209 | CORE_ADDR pc_val; |
1210 | ||
61a1198a UW |
1211 | if (gdbarch_read_pc_p (gdbarch)) |
1212 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1213 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1214 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1215 | { |
61a1198a | 1216 | ULONGEST raw_val; |
123f5f96 | 1217 | |
05d1431c PA |
1218 | if (regcache_cooked_read_unsigned (regcache, |
1219 | gdbarch_pc_regnum (gdbarch), | |
1220 | &raw_val) == REG_UNAVAILABLE) | |
1221 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1222 | ||
214e098a | 1223 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1224 | } |
1225 | else | |
515630c5 UW |
1226 | internal_error (__FILE__, __LINE__, |
1227 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1228 | return pc_val; |
1229 | } | |
1230 | ||
32178cab | 1231 | void |
515630c5 | 1232 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1233 | { |
ac7936df | 1234 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1235 | |
61a1198a UW |
1236 | if (gdbarch_write_pc_p (gdbarch)) |
1237 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1238 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1239 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1240 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1241 | else |
1242 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1243 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1244 | |
1245 | /* Writing the PC (for instance, from "load") invalidates the | |
1246 | current frame. */ | |
1247 | reinit_frame_cache (); | |
32178cab MS |
1248 | } |
1249 | ||
d999647b | 1250 | int |
31716595 | 1251 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1252 | { |
1253 | return gdbarch_num_regs (arch ()); | |
1254 | } | |
1255 | ||
ed771251 | 1256 | void |
ef79d9a3 | 1257 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1258 | { |
ef79d9a3 | 1259 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1260 | |
1261 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1262 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1263 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1264 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1265 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1266 | gdbarch_register_name (gdbarch, regno)); | |
1267 | else | |
1268 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1269 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1270 | { | |
1271 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1272 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1273 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1274 | |
1275 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1276 | for (int i = 0; i < size; i++) | |
1277 | { | |
1278 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1279 | } | |
1280 | if (size <= sizeof (LONGEST)) | |
1281 | { | |
1282 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1283 | ||
1284 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1285 | core_addr_to_string_nz (val), plongest (val)); | |
1286 | } | |
1287 | } | |
1288 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1289 | } | |
32178cab | 1290 | |
705152c5 | 1291 | static void |
0b39b52e | 1292 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1293 | { |
1294 | /* Force-flush the register cache. */ | |
1295 | registers_changed (); | |
1296 | if (from_tty) | |
a3f17187 | 1297 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1298 | } |
1299 | ||
4c74fe6b YQ |
1300 | void |
1301 | register_dump::dump (ui_file *file) | |
af030b9a | 1302 | { |
4c74fe6b YQ |
1303 | auto descr = regcache_descr (m_gdbarch); |
1304 | int regnum; | |
1305 | int footnote_nr = 0; | |
1306 | int footnote_register_offset = 0; | |
1307 | int footnote_register_type_name_null = 0; | |
1308 | long register_offset = 0; | |
af030b9a | 1309 | |
4c74fe6b | 1310 | gdb_assert (descr->nr_cooked_registers |
f6efe3f8 | 1311 | == gdbarch_num_cooked_regs (m_gdbarch)); |
af030b9a | 1312 | |
4c74fe6b YQ |
1313 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1314 | { | |
1315 | /* Name. */ | |
1316 | if (regnum < 0) | |
1317 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1318 | else | |
1319 | { | |
1320 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1321 | |
4c74fe6b YQ |
1322 | if (p == NULL) |
1323 | p = ""; | |
1324 | else if (p[0] == '\0') | |
1325 | p = "''"; | |
1326 | fprintf_unfiltered (file, " %-10s", p); | |
1327 | } | |
af030b9a | 1328 | |
4c74fe6b YQ |
1329 | /* Number. */ |
1330 | if (regnum < 0) | |
1331 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1332 | else | |
1333 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1334 | |
4c74fe6b YQ |
1335 | /* Relative number. */ |
1336 | if (regnum < 0) | |
1337 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1338 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1339 | fprintf_unfiltered (file, " %4d", regnum); | |
1340 | else | |
1341 | fprintf_unfiltered (file, " %4d", | |
1342 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1343 | |
4c74fe6b YQ |
1344 | /* Offset. */ |
1345 | if (regnum < 0) | |
1346 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1347 | else | |
af030b9a | 1348 | { |
4c74fe6b YQ |
1349 | fprintf_unfiltered (file, " %6ld", |
1350 | descr->register_offset[regnum]); | |
1351 | if (register_offset != descr->register_offset[regnum] | |
1352 | || (regnum > 0 | |
1353 | && (descr->register_offset[regnum] | |
1354 | != (descr->register_offset[regnum - 1] | |
1355 | + descr->sizeof_register[regnum - 1]))) | |
1356 | ) | |
af030b9a | 1357 | { |
4c74fe6b YQ |
1358 | if (!footnote_register_offset) |
1359 | footnote_register_offset = ++footnote_nr; | |
1360 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1361 | } |
4c74fe6b YQ |
1362 | else |
1363 | fprintf_unfiltered (file, " "); | |
1364 | register_offset = (descr->register_offset[regnum] | |
1365 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1366 | } |
1367 | ||
4c74fe6b YQ |
1368 | /* Size. */ |
1369 | if (regnum < 0) | |
1370 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1371 | else | |
1372 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1373 | |
4c74fe6b | 1374 | /* Type. */ |
f3384e66 | 1375 | { |
4c74fe6b YQ |
1376 | const char *t; |
1377 | std::string name_holder; | |
b59ff9d5 | 1378 | |
4c74fe6b YQ |
1379 | if (regnum < 0) |
1380 | t = "Type"; | |
215c69dc YQ |
1381 | else |
1382 | { | |
4c74fe6b | 1383 | static const char blt[] = "builtin_type"; |
123f5f96 | 1384 | |
4c74fe6b YQ |
1385 | t = TYPE_NAME (register_type (m_gdbarch, regnum)); |
1386 | if (t == NULL) | |
f3384e66 | 1387 | { |
4c74fe6b YQ |
1388 | if (!footnote_register_type_name_null) |
1389 | footnote_register_type_name_null = ++footnote_nr; | |
1390 | name_holder = string_printf ("*%d", | |
1391 | footnote_register_type_name_null); | |
1392 | t = name_holder.c_str (); | |
f3384e66 | 1393 | } |
4c74fe6b YQ |
1394 | /* Chop a leading builtin_type. */ |
1395 | if (startswith (t, blt)) | |
1396 | t += strlen (blt); | |
f3384e66 | 1397 | } |
4c74fe6b | 1398 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1399 | } |
f3384e66 | 1400 | |
4c74fe6b YQ |
1401 | /* Leading space always present. */ |
1402 | fprintf_unfiltered (file, " "); | |
af030b9a | 1403 | |
4c74fe6b | 1404 | dump_reg (file, regnum); |
ed4227b7 | 1405 | |
4c74fe6b | 1406 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1407 | } |
1408 | ||
4c74fe6b YQ |
1409 | if (footnote_register_offset) |
1410 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1411 | footnote_register_offset); | |
1412 | if (footnote_register_type_name_null) | |
1413 | fprintf_unfiltered (file, | |
1414 | "*%d: Register type's name NULL.\n", | |
1415 | footnote_register_type_name_null); | |
c21236dc PA |
1416 | } |
1417 | ||
8248946c YQ |
1418 | #if GDB_SELF_TEST |
1419 | #include "selftest.h" | |
1b30aaa5 YQ |
1420 | #include "selftest-arch.h" |
1421 | #include "gdbthread.h" | |
ec7a5fcb | 1422 | #include "target-float.h" |
8248946c YQ |
1423 | |
1424 | namespace selftests { | |
1425 | ||
e521e87e | 1426 | class regcache_access : public regcache |
8248946c | 1427 | { |
e521e87e YQ |
1428 | public: |
1429 | ||
1430 | /* Return the number of elements in current_regcache. */ | |
1431 | ||
1432 | static size_t | |
1433 | current_regcache_size () | |
1434 | { | |
1435 | return std::distance (regcache::current_regcache.begin (), | |
1436 | regcache::current_regcache.end ()); | |
1437 | } | |
1438 | }; | |
8248946c YQ |
1439 | |
1440 | static void | |
1441 | current_regcache_test (void) | |
1442 | { | |
1443 | /* It is empty at the start. */ | |
e521e87e | 1444 | SELF_CHECK (regcache_access::current_regcache_size () == 0); |
8248946c YQ |
1445 | |
1446 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1447 | ||
1448 | /* Get regcache from ptid1, a new regcache is added to | |
1449 | current_regcache. */ | |
1450 | regcache *regcache = get_thread_arch_aspace_regcache (ptid1, | |
1451 | target_gdbarch (), | |
1452 | NULL); | |
1453 | ||
1454 | SELF_CHECK (regcache != NULL); | |
1455 | SELF_CHECK (regcache->ptid () == ptid1); | |
e521e87e | 1456 | SELF_CHECK (regcache_access::current_regcache_size () == 1); |
8248946c YQ |
1457 | |
1458 | /* Get regcache from ptid2, a new regcache is added to | |
1459 | current_regcache. */ | |
1460 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1461 | target_gdbarch (), | |
1462 | NULL); | |
1463 | SELF_CHECK (regcache != NULL); | |
1464 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1465 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1466 | |
1467 | /* Get regcache from ptid3, a new regcache is added to | |
1468 | current_regcache. */ | |
1469 | regcache = get_thread_arch_aspace_regcache (ptid3, | |
1470 | target_gdbarch (), | |
1471 | NULL); | |
1472 | SELF_CHECK (regcache != NULL); | |
1473 | SELF_CHECK (regcache->ptid () == ptid3); | |
e521e87e | 1474 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1475 | |
1476 | /* Get regcache from ptid2 again, nothing is added to | |
1477 | current_regcache. */ | |
1478 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1479 | target_gdbarch (), | |
1480 | NULL); | |
1481 | SELF_CHECK (regcache != NULL); | |
1482 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1483 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1484 | |
1485 | /* Mark ptid2 is changed, so regcache of ptid2 should be removed from | |
1486 | current_regcache. */ | |
1487 | registers_changed_ptid (ptid2); | |
e521e87e | 1488 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1489 | } |
1490 | ||
1b30aaa5 YQ |
1491 | class target_ops_no_register : public test_target_ops |
1492 | { | |
1493 | public: | |
1494 | target_ops_no_register () | |
1495 | : test_target_ops {} | |
f6ac5f3d | 1496 | {} |
1b30aaa5 YQ |
1497 | |
1498 | void reset () | |
1499 | { | |
1500 | fetch_registers_called = 0; | |
1501 | store_registers_called = 0; | |
1502 | xfer_partial_called = 0; | |
1503 | } | |
1504 | ||
f6ac5f3d PA |
1505 | void fetch_registers (regcache *regs, int regno) override; |
1506 | void store_registers (regcache *regs, int regno) override; | |
1507 | ||
1508 | enum target_xfer_status xfer_partial (enum target_object object, | |
1509 | const char *annex, gdb_byte *readbuf, | |
1510 | const gdb_byte *writebuf, | |
1511 | ULONGEST offset, ULONGEST len, | |
1512 | ULONGEST *xfered_len) override; | |
1513 | ||
1b30aaa5 YQ |
1514 | unsigned int fetch_registers_called = 0; |
1515 | unsigned int store_registers_called = 0; | |
1516 | unsigned int xfer_partial_called = 0; | |
1517 | }; | |
1518 | ||
f6ac5f3d PA |
1519 | void |
1520 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1521 | { |
1b30aaa5 YQ |
1522 | /* Mark register available. */ |
1523 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1524 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1525 | } |
1526 | ||
f6ac5f3d PA |
1527 | void |
1528 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1529 | { |
f6ac5f3d | 1530 | this->store_registers_called++; |
1b30aaa5 YQ |
1531 | } |
1532 | ||
f6ac5f3d PA |
1533 | enum target_xfer_status |
1534 | target_ops_no_register::xfer_partial (enum target_object object, | |
1535 | const char *annex, gdb_byte *readbuf, | |
1536 | const gdb_byte *writebuf, | |
1537 | ULONGEST offset, ULONGEST len, | |
1538 | ULONGEST *xfered_len) | |
1b30aaa5 | 1539 | { |
f6ac5f3d | 1540 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1541 | |
1542 | *xfered_len = len; | |
1543 | return TARGET_XFER_OK; | |
1544 | } | |
1545 | ||
1546 | class readwrite_regcache : public regcache | |
1547 | { | |
1548 | public: | |
1549 | readwrite_regcache (struct gdbarch *gdbarch) | |
796bb026 | 1550 | : regcache (gdbarch, nullptr) |
1b30aaa5 YQ |
1551 | {} |
1552 | }; | |
1553 | ||
1554 | /* Test regcache::cooked_read gets registers from raw registers and | |
1555 | memory instead of target to_{fetch,store}_registers. */ | |
1556 | ||
1557 | static void | |
1558 | cooked_read_test (struct gdbarch *gdbarch) | |
1559 | { | |
1560 | /* Error out if debugging something, because we're going to push the | |
1561 | test target, which would pop any existing target. */ | |
8b88a78e | 1562 | if (current_top_target ()->to_stratum >= process_stratum) |
1b30aaa5 YQ |
1563 | error (_("target already pushed")); |
1564 | ||
1565 | /* Create a mock environment. An inferior with a thread, with a | |
1566 | process_stratum target pushed. */ | |
1567 | ||
1568 | target_ops_no_register mock_target; | |
1569 | ptid_t mock_ptid (1, 1); | |
1570 | inferior mock_inferior (mock_ptid.pid ()); | |
1571 | address_space mock_aspace {}; | |
1572 | mock_inferior.gdbarch = gdbarch; | |
1573 | mock_inferior.aspace = &mock_aspace; | |
1574 | thread_info mock_thread (&mock_inferior, mock_ptid); | |
1575 | ||
1576 | scoped_restore restore_thread_list | |
1577 | = make_scoped_restore (&thread_list, &mock_thread); | |
1578 | ||
1579 | /* Add the mock inferior to the inferior list so that look ups by | |
1580 | target+ptid can find it. */ | |
1581 | scoped_restore restore_inferior_list | |
1582 | = make_scoped_restore (&inferior_list); | |
1583 | inferior_list = &mock_inferior; | |
1584 | ||
1585 | /* Switch to the mock inferior. */ | |
1586 | scoped_restore_current_inferior restore_current_inferior; | |
1587 | set_current_inferior (&mock_inferior); | |
1588 | ||
1589 | /* Push the process_stratum target so we can mock accessing | |
1590 | registers. */ | |
1591 | push_target (&mock_target); | |
1592 | ||
1593 | /* Pop it again on exit (return/exception). */ | |
1594 | struct on_exit | |
1595 | { | |
1596 | ~on_exit () | |
1597 | { | |
1598 | pop_all_targets_at_and_above (process_stratum); | |
1599 | } | |
1600 | } pop_targets; | |
1601 | ||
1602 | /* Switch to the mock thread. */ | |
1603 | scoped_restore restore_inferior_ptid | |
1604 | = make_scoped_restore (&inferior_ptid, mock_ptid); | |
1605 | ||
1606 | /* Test that read one raw register from regcache_no_target will go | |
1607 | to the target layer. */ | |
1b30aaa5 YQ |
1608 | |
1609 | /* Find a raw register which size isn't zero. */ | |
b926417a TT |
1610 | int nonzero_regnum; |
1611 | for (nonzero_regnum = 0; | |
1612 | nonzero_regnum < gdbarch_num_regs (gdbarch); | |
1613 | nonzero_regnum++) | |
1b30aaa5 | 1614 | { |
b926417a | 1615 | if (register_size (gdbarch, nonzero_regnum) != 0) |
1b30aaa5 YQ |
1616 | break; |
1617 | } | |
1618 | ||
1619 | readwrite_regcache readwrite (gdbarch); | |
b926417a | 1620 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, nonzero_regnum)); |
1b30aaa5 | 1621 | |
b926417a | 1622 | readwrite.raw_read (nonzero_regnum, buf.data ()); |
1b30aaa5 YQ |
1623 | |
1624 | /* raw_read calls target_fetch_registers. */ | |
1625 | SELF_CHECK (mock_target.fetch_registers_called > 0); | |
1626 | mock_target.reset (); | |
1627 | ||
1628 | /* Mark all raw registers valid, so the following raw registers | |
1629 | accesses won't go to target. */ | |
1630 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1631 | readwrite.raw_update (i); | |
1632 | ||
1633 | mock_target.reset (); | |
1634 | /* Then, read all raw and pseudo registers, and don't expect calling | |
1635 | to_{fetch,store}_registers. */ | |
f6efe3f8 | 1636 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
1b30aaa5 YQ |
1637 | { |
1638 | if (register_size (gdbarch, regnum) == 0) | |
1639 | continue; | |
1640 | ||
b926417a | 1641 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
1b30aaa5 | 1642 | |
b926417a TT |
1643 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, |
1644 | inner_buf.data ())); | |
1b30aaa5 | 1645 | |
dc711524 YQ |
1646 | SELF_CHECK (mock_target.fetch_registers_called == 0); |
1647 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1b30aaa5 YQ |
1648 | |
1649 | /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */ | |
1650 | if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu) | |
1651 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1652 | ||
1653 | mock_target.reset (); | |
1654 | } | |
a63f2d2f | 1655 | |
215c69dc | 1656 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1657 | |
1658 | /* GDB may go to target layer to fetch all registers and memory for | |
1659 | readonly regcache. */ | |
1660 | mock_target.reset (); | |
1661 | ||
f6efe3f8 | 1662 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
a63f2d2f | 1663 | { |
a63f2d2f YQ |
1664 | if (register_size (gdbarch, regnum) == 0) |
1665 | continue; | |
1666 | ||
b926417a | 1667 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
a63f2d2f | 1668 | enum register_status status = readonly.cooked_read (regnum, |
b926417a | 1669 | inner_buf.data ()); |
a63f2d2f YQ |
1670 | |
1671 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1672 | { | |
1673 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1674 | ||
1675 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1676 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1677 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1678 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1679 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1680 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 | 1681 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
bea556ab | 1682 | || bfd_arch == bfd_arch_riscv || bfd_arch == bfd_arch_csky) |
a63f2d2f YQ |
1683 | { |
1684 | /* Raw registers. If raw registers are not in save_reggroup, | |
1685 | their status are unknown. */ | |
1686 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1687 | SELF_CHECK (status == REG_VALID); | |
1688 | else | |
1689 | SELF_CHECK (status == REG_UNKNOWN); | |
1690 | } | |
1691 | else | |
1692 | SELF_CHECK (status == REG_VALID); | |
1693 | } | |
1694 | else | |
1695 | { | |
1696 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1697 | SELF_CHECK (status == REG_VALID); | |
1698 | else | |
1699 | { | |
1700 | /* If pseudo registers are not in save_reggroup, some of | |
1701 | them can be computed from saved raw registers, but some | |
1702 | of them are unknown. */ | |
1703 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1704 | ||
1705 | if (bfd_arch == bfd_arch_frv | |
1706 | || bfd_arch == bfd_arch_m32c | |
1707 | || bfd_arch == bfd_arch_mep | |
1708 | || bfd_arch == bfd_arch_sh) | |
1709 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1710 | else if (bfd_arch == bfd_arch_mips | |
1711 | || bfd_arch == bfd_arch_h8300) | |
1712 | SELF_CHECK (status == REG_UNKNOWN); | |
1713 | else | |
1714 | SELF_CHECK (status == REG_VALID); | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | SELF_CHECK (mock_target.fetch_registers_called == 0); | |
1719 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1720 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1721 | ||
1722 | mock_target.reset (); | |
1723 | } | |
1b30aaa5 YQ |
1724 | } |
1725 | ||
ec7a5fcb YQ |
1726 | /* Test regcache::cooked_write by writing some expected contents to |
1727 | registers, and checking that contents read from registers and the | |
1728 | expected contents are the same. */ | |
1729 | ||
1730 | static void | |
1731 | cooked_write_test (struct gdbarch *gdbarch) | |
1732 | { | |
1733 | /* Error out if debugging something, because we're going to push the | |
1734 | test target, which would pop any existing target. */ | |
8b88a78e | 1735 | if (current_top_target ()->to_stratum >= process_stratum) |
ec7a5fcb YQ |
1736 | error (_("target already pushed")); |
1737 | ||
1738 | /* Create a mock environment. A process_stratum target pushed. */ | |
1739 | ||
1740 | target_ops_no_register mock_target; | |
1741 | ||
1742 | /* Push the process_stratum target so we can mock accessing | |
1743 | registers. */ | |
1744 | push_target (&mock_target); | |
1745 | ||
1746 | /* Pop it again on exit (return/exception). */ | |
1747 | struct on_exit | |
1748 | { | |
1749 | ~on_exit () | |
1750 | { | |
1751 | pop_all_targets_at_and_above (process_stratum); | |
1752 | } | |
1753 | } pop_targets; | |
1754 | ||
1755 | readwrite_regcache readwrite (gdbarch); | |
1756 | ||
f6efe3f8 | 1757 | const int num_regs = gdbarch_num_cooked_regs (gdbarch); |
ec7a5fcb YQ |
1758 | |
1759 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1760 | { | |
1761 | if (register_size (gdbarch, regnum) == 0 | |
1762 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1763 | continue; | |
1764 | ||
1765 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1766 | ||
1767 | if ((bfd_arch == bfd_arch_sparc | |
1768 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1769 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1770 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1771 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1772 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1773 | || (bfd_arch == bfd_arch_spu |
1774 | /* SPU pseudo registers except SPU_SP_REGNUM are got by | |
1775 | TARGET_OBJECT_SPU. */ | |
1776 | && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130)) | |
1777 | continue; | |
1778 | ||
1779 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1780 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1781 | const auto type = register_type (gdbarch, regnum); | |
1782 | ||
1783 | if (TYPE_CODE (type) == TYPE_CODE_FLT | |
1784 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
1785 | { | |
1786 | /* Generate valid float format. */ | |
1787 | target_float_from_string (expected.data (), type, "1.25"); | |
1788 | } | |
1789 | else if (TYPE_CODE (type) == TYPE_CODE_INT | |
1790 | || TYPE_CODE (type) == TYPE_CODE_ARRAY | |
1791 | || TYPE_CODE (type) == TYPE_CODE_PTR | |
1792 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
1793 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
1794 | { | |
1795 | if (bfd_arch == bfd_arch_ia64 | |
1796 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1797 | && (bfd_arch == bfd_arch_xtensa | |
1798 | || bfd_arch == bfd_arch_bfin | |
1799 | || bfd_arch == bfd_arch_m32c | |
1800 | /* m68hc11 pseudo registers are in memory. */ | |
1801 | || bfd_arch == bfd_arch_m68hc11 | |
1802 | || bfd_arch == bfd_arch_m68hc12 | |
1803 | || bfd_arch == bfd_arch_s390)) | |
1804 | || (bfd_arch == bfd_arch_frv | |
1805 | /* FRV pseudo registers except iacc0. */ | |
1806 | && regnum > gdbarch_num_regs (gdbarch))) | |
1807 | { | |
1808 | /* Skip setting the expected values for some architecture | |
1809 | registers. */ | |
1810 | } | |
1811 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1812 | { | |
1813 | /* RL78_PC_REGNUM */ | |
1814 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1815 | expected[j] = j; | |
1816 | } | |
1817 | else | |
1818 | { | |
1819 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1820 | expected[j] = j; | |
1821 | } | |
1822 | } | |
1823 | else if (TYPE_CODE (type) == TYPE_CODE_FLAGS) | |
1824 | { | |
1825 | /* No idea how to test flags. */ | |
1826 | continue; | |
1827 | } | |
1828 | else | |
1829 | { | |
1830 | /* If we don't know how to create the expected value for the | |
1831 | this type, make it fail. */ | |
1832 | SELF_CHECK (0); | |
1833 | } | |
1834 | ||
1835 | readwrite.cooked_write (regnum, expected.data ()); | |
1836 | ||
1837 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1838 | SELF_CHECK (expected == buf); | |
1839 | } | |
1840 | } | |
1841 | ||
8248946c YQ |
1842 | } // namespace selftests |
1843 | #endif /* GDB_SELF_TEST */ | |
1844 | ||
32178cab MS |
1845 | void |
1846 | _initialize_regcache (void) | |
1847 | { | |
3e43a32a MS |
1848 | regcache_descr_handle |
1849 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1850 | |
76727919 TT |
1851 | gdb::observers::target_changed.attach (regcache_observer_target_changed); |
1852 | gdb::observers::thread_ptid_changed.attach | |
1853 | (regcache::regcache_thread_ptid_changed); | |
f4c5303c | 1854 | |
705152c5 | 1855 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1bedd215 | 1856 | _("Force gdb to flush its register cache (maintainer command)")); |
39f77062 | 1857 | |
8248946c | 1858 | #if GDB_SELF_TEST |
1526853e | 1859 | selftests::register_test ("current_regcache", selftests::current_regcache_test); |
1b30aaa5 YQ |
1860 | |
1861 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1862 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1863 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1864 | selftests::cooked_write_test); | |
8248946c | 1865 | #endif |
32178cab | 1866 | } |