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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 MS |
21 | #include "inferior.h" |
22 | #include "target.h" | |
23 | #include "gdbarch.h" | |
705152c5 | 24 | #include "gdbcmd.h" |
4e052eda | 25 | #include "regcache.h" |
b59ff9d5 | 26 | #include "reggroups.h" |
76727919 | 27 | #include "observable.h" |
0b309272 | 28 | #include "regset.h" |
94bb8dfe | 29 | #include <forward_list> |
32178cab MS |
30 | |
31 | /* | |
32 | * DATA STRUCTURE | |
33 | * | |
34 | * Here is the actual register cache. | |
35 | */ | |
36 | ||
3fadccb3 | 37 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 38 | Computed once when the architecture is created. */ |
3fadccb3 AC |
39 | |
40 | struct gdbarch_data *regcache_descr_handle; | |
41 | ||
42 | struct regcache_descr | |
43 | { | |
44 | /* The architecture this descriptor belongs to. */ | |
45 | struct gdbarch *gdbarch; | |
46 | ||
bb1db049 AC |
47 | /* The raw register cache. Each raw (or hard) register is supplied |
48 | by the target interface. The raw cache should not contain | |
49 | redundant information - if the PC is constructed from two | |
d2f0b918 | 50 | registers then those registers and not the PC lives in the raw |
bb1db049 | 51 | cache. */ |
3fadccb3 | 52 | long sizeof_raw_registers; |
3fadccb3 | 53 | |
d138e37a AC |
54 | /* The cooked register space. Each cooked register in the range |
55 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
56 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 57 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 58 | both raw registers and memory by the architecture methods |
02f60eae | 59 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 60 | int nr_cooked_registers; |
067df2e5 | 61 | long sizeof_cooked_registers; |
d138e37a | 62 | |
86d31898 | 63 | /* Offset and size (in 8 bit bytes), of each register in the |
d138e37a | 64 | register cache. All registers (including those in the range |
99e42fd8 PA |
65 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
66 | offset. */ | |
3fadccb3 | 67 | long *register_offset; |
3fadccb3 | 68 | long *sizeof_register; |
3fadccb3 | 69 | |
bb425013 AC |
70 | /* Cached table containing the type of each register. */ |
71 | struct type **register_type; | |
3fadccb3 AC |
72 | }; |
73 | ||
3fadccb3 AC |
74 | static void * |
75 | init_regcache_descr (struct gdbarch *gdbarch) | |
76 | { | |
77 | int i; | |
78 | struct regcache_descr *descr; | |
79 | gdb_assert (gdbarch != NULL); | |
80 | ||
bb425013 | 81 | /* Create an initial, zero filled, table. */ |
116f06ea | 82 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 83 | descr->gdbarch = gdbarch; |
3fadccb3 | 84 | |
d138e37a AC |
85 | /* Total size of the register space. The raw registers are mapped |
86 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 87 | either mapped onto raw-registers or memory. */ |
214e098a UW |
88 | descr->nr_cooked_registers = gdbarch_num_regs (gdbarch) |
89 | + gdbarch_num_pseudo_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 | |
f57d151a | 165 | gdb_assert (regnum >= 0 |
214e098a UW |
166 | && regnum < (gdbarch_num_regs (gdbarch) |
167 | + gdbarch_num_pseudo_regs (gdbarch))); | |
08a617da | 168 | size = descr->sizeof_register[regnum]; |
08a617da AC |
169 | return size; |
170 | } | |
171 | ||
8d689ee5 YQ |
172 | /* See common/common-regcache.h. */ |
173 | ||
174 | int | |
175 | regcache_register_size (const struct regcache *regcache, int n) | |
176 | { | |
ac7936df | 177 | return register_size (regcache->arch (), n); |
8d689ee5 YQ |
178 | } |
179 | ||
31716595 YQ |
180 | reg_buffer::reg_buffer (gdbarch *gdbarch, bool has_pseudo) |
181 | : m_has_pseudo (has_pseudo) | |
3fadccb3 | 182 | { |
ef79d9a3 YQ |
183 | gdb_assert (gdbarch != NULL); |
184 | m_descr = regcache_descr (gdbarch); | |
4621115f | 185 | |
31716595 | 186 | if (has_pseudo) |
4621115f | 187 | { |
835dcf92 SM |
188 | m_registers.reset (new gdb_byte[m_descr->sizeof_cooked_registers] ()); |
189 | m_register_status.reset | |
190 | (new register_status[m_descr->nr_cooked_registers] ()); | |
4621115f YQ |
191 | } |
192 | else | |
193 | { | |
835dcf92 SM |
194 | m_registers.reset (new gdb_byte[m_descr->sizeof_raw_registers] ()); |
195 | m_register_status.reset | |
196 | (new register_status[gdbarch_num_regs (gdbarch)] ()); | |
4621115f | 197 | } |
31716595 YQ |
198 | } |
199 | ||
796bb026 YQ |
200 | regcache::regcache (gdbarch *gdbarch, const address_space *aspace_) |
201 | /* The register buffers. A read/write register cache can only hold | |
202 | [0 .. gdbarch_num_regs). */ | |
203 | : detached_regcache (gdbarch, false), m_aspace (aspace_) | |
31716595 | 204 | { |
ef79d9a3 YQ |
205 | m_ptid = minus_one_ptid; |
206 | } | |
4621115f | 207 | |
302abd6e SM |
208 | readonly_detached_regcache::readonly_detached_regcache (regcache &src) |
209 | : readonly_detached_regcache (src.arch (), | |
210 | [&src] (int regnum, gdb_byte *buf) | |
211 | { | |
212 | return src.cooked_read (regnum, buf); | |
213 | }) | |
daf6667d YQ |
214 | { |
215 | } | |
216 | ||
ef79d9a3 | 217 | gdbarch * |
31716595 | 218 | reg_buffer::arch () const |
ef79d9a3 YQ |
219 | { |
220 | return m_descr->gdbarch; | |
221 | } | |
3fadccb3 | 222 | |
b292235f | 223 | /* Cleanup class for invalidating a register. */ |
b94ade42 | 224 | |
b292235f | 225 | class regcache_invalidator |
b94ade42 | 226 | { |
b292235f | 227 | public: |
b94ade42 | 228 | |
b292235f TT |
229 | regcache_invalidator (struct regcache *regcache, int regnum) |
230 | : m_regcache (regcache), | |
231 | m_regnum (regnum) | |
232 | { | |
233 | } | |
b94ade42 | 234 | |
b292235f TT |
235 | ~regcache_invalidator () |
236 | { | |
237 | if (m_regcache != nullptr) | |
6aa7d724 | 238 | m_regcache->invalidate (m_regnum); |
b292235f | 239 | } |
b94ade42 | 240 | |
b292235f | 241 | DISABLE_COPY_AND_ASSIGN (regcache_invalidator); |
b94ade42 | 242 | |
b292235f TT |
243 | void release () |
244 | { | |
245 | m_regcache = nullptr; | |
246 | } | |
247 | ||
248 | private: | |
249 | ||
250 | struct regcache *m_regcache; | |
251 | int m_regnum; | |
252 | }; | |
b94ade42 | 253 | |
51b1fe4e AC |
254 | /* Return a pointer to register REGNUM's buffer cache. */ |
255 | ||
ef79d9a3 | 256 | gdb_byte * |
31716595 | 257 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 258 | { |
835dcf92 | 259 | return m_registers.get () + m_descr->register_offset[regnum]; |
51b1fe4e AC |
260 | } |
261 | ||
ef79d9a3 | 262 | void |
302abd6e | 263 | reg_buffer::save (register_read_ftype cooked_read) |
ef79d9a3 YQ |
264 | { |
265 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 266 | int regnum; |
123f5f96 | 267 | |
daf6667d YQ |
268 | /* It should have pseudo registers. */ |
269 | gdb_assert (m_has_pseudo); | |
2d28509a | 270 | /* Clear the dest. */ |
835dcf92 SM |
271 | memset (m_registers.get (), 0, m_descr->sizeof_cooked_registers); |
272 | memset (m_register_status.get (), REG_UNKNOWN, m_descr->nr_cooked_registers); | |
2d28509a | 273 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
274 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
275 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 276 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 277 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
278 | { |
279 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
280 | { | |
50d6adef | 281 | gdb_byte *dst_buf = register_buffer (regnum); |
302abd6e | 282 | enum register_status status = cooked_read (regnum, dst_buf); |
123f5f96 | 283 | |
50d6adef AH |
284 | gdb_assert (status != REG_UNKNOWN); |
285 | ||
286 | if (status != REG_VALID) | |
287 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 288 | |
ef79d9a3 | 289 | m_register_status[regnum] = status; |
2d28509a AC |
290 | } |
291 | } | |
292 | } | |
293 | ||
ef79d9a3 | 294 | void |
daf6667d | 295 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 296 | { |
ef79d9a3 | 297 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 298 | int regnum; |
123f5f96 | 299 | |
fc5b8736 | 300 | gdb_assert (src != NULL); |
daf6667d | 301 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
302 | |
303 | gdb_assert (gdbarch == src->arch ()); | |
304 | ||
2d28509a | 305 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
306 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
307 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 308 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 309 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 310 | { |
5602984a | 311 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 312 | { |
ef79d9a3 YQ |
313 | if (src->m_register_status[regnum] == REG_VALID) |
314 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
315 | } |
316 | } | |
317 | } | |
318 | ||
9c861883 AH |
319 | /* See common/common-regcache.h. */ |
320 | ||
ef79d9a3 | 321 | enum register_status |
c8ec2f33 | 322 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 323 | { |
c8ec2f33 | 324 | assert_regnum (regnum); |
6ed7ea50 | 325 | |
aac0d564 | 326 | return m_register_status[regnum]; |
3fadccb3 AC |
327 | } |
328 | ||
ef79d9a3 | 329 | void |
9c861883 | 330 | reg_buffer::invalidate (int regnum) |
ef79d9a3 | 331 | { |
4e888c28 | 332 | assert_regnum (regnum); |
ef79d9a3 YQ |
333 | m_register_status[regnum] = REG_UNKNOWN; |
334 | } | |
9c5ea4d9 | 335 | |
4e888c28 | 336 | void |
31716595 | 337 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 338 | { |
31716595 YQ |
339 | gdb_assert (regnum >= 0); |
340 | if (m_has_pseudo) | |
341 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
342 | else | |
343 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
344 | } |
345 | ||
3fadccb3 | 346 | /* Global structure containing the current regcache. */ |
3fadccb3 | 347 | |
5ebd2499 | 348 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
349 | recording if the register values have been changed (eg. by the |
350 | user). Therefore all registers must be written back to the | |
351 | target when appropriate. */ | |
e521e87e | 352 | std::forward_list<regcache *> regcache::current_regcache; |
c2250ad1 UW |
353 | |
354 | struct regcache * | |
e2d96639 YQ |
355 | get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch, |
356 | struct address_space *aspace) | |
c2250ad1 | 357 | { |
e521e87e | 358 | for (const auto ®cache : regcache::current_regcache) |
94bb8dfe YQ |
359 | if (ptid_equal (regcache->ptid (), ptid) && regcache->arch () == gdbarch) |
360 | return regcache; | |
594f7785 | 361 | |
796bb026 | 362 | regcache *new_regcache = new regcache (gdbarch, aspace); |
594f7785 | 363 | |
e521e87e | 364 | regcache::current_regcache.push_front (new_regcache); |
ef79d9a3 | 365 | new_regcache->set_ptid (ptid); |
e2d96639 | 366 | |
e2d96639 YQ |
367 | return new_regcache; |
368 | } | |
369 | ||
370 | struct regcache * | |
371 | get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) | |
372 | { | |
ed4227b7 | 373 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 374 | |
e2d96639 | 375 | return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace); |
594f7785 UW |
376 | } |
377 | ||
c2250ad1 UW |
378 | static ptid_t current_thread_ptid; |
379 | static struct gdbarch *current_thread_arch; | |
380 | ||
381 | struct regcache * | |
382 | get_thread_regcache (ptid_t ptid) | |
383 | { | |
384 | if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid)) | |
385 | { | |
386 | current_thread_ptid = ptid; | |
387 | current_thread_arch = target_thread_architecture (ptid); | |
388 | } | |
389 | ||
390 | return get_thread_arch_regcache (ptid, current_thread_arch); | |
391 | } | |
392 | ||
393 | struct regcache * | |
394 | get_current_regcache (void) | |
594f7785 UW |
395 | { |
396 | return get_thread_regcache (inferior_ptid); | |
397 | } | |
32178cab | 398 | |
361c8ade GB |
399 | /* See common/common-regcache.h. */ |
400 | ||
401 | struct regcache * | |
402 | get_thread_regcache_for_ptid (ptid_t ptid) | |
403 | { | |
404 | return get_thread_regcache (ptid); | |
405 | } | |
32178cab | 406 | |
f4c5303c OF |
407 | /* Observer for the target_changed event. */ |
408 | ||
2c0b251b | 409 | static void |
f4c5303c OF |
410 | regcache_observer_target_changed (struct target_ops *target) |
411 | { | |
412 | registers_changed (); | |
413 | } | |
414 | ||
5231c1fd PA |
415 | /* Update global variables old ptids to hold NEW_PTID if they were |
416 | holding OLD_PTID. */ | |
e521e87e YQ |
417 | void |
418 | regcache::regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) | |
5231c1fd | 419 | { |
e521e87e | 420 | for (auto ®cache : regcache::current_regcache) |
94bb8dfe YQ |
421 | { |
422 | if (ptid_equal (regcache->ptid (), old_ptid)) | |
423 | regcache->set_ptid (new_ptid); | |
424 | } | |
5231c1fd PA |
425 | } |
426 | ||
32178cab MS |
427 | /* Low level examining and depositing of registers. |
428 | ||
429 | The caller is responsible for making sure that the inferior is | |
430 | stopped before calling the fetching routines, or it will get | |
431 | garbage. (a change from GDB version 3, in which the caller got the | |
432 | value from the last stop). */ | |
433 | ||
434 | /* REGISTERS_CHANGED () | |
435 | ||
436 | Indicate that registers may have changed, so invalidate the cache. */ | |
437 | ||
438 | void | |
e66408ed | 439 | registers_changed_ptid (ptid_t ptid) |
32178cab | 440 | { |
e521e87e | 441 | for (auto oit = regcache::current_regcache.before_begin (), |
94bb8dfe | 442 | it = std::next (oit); |
e521e87e | 443 | it != regcache::current_regcache.end (); |
94bb8dfe | 444 | ) |
c2250ad1 | 445 | { |
94bb8dfe | 446 | if (ptid_match ((*it)->ptid (), ptid)) |
e66408ed | 447 | { |
94bb8dfe | 448 | delete *it; |
e521e87e | 449 | it = regcache::current_regcache.erase_after (oit); |
e66408ed | 450 | } |
94bb8dfe YQ |
451 | else |
452 | oit = it++; | |
c2250ad1 | 453 | } |
32178cab | 454 | |
c34fd852 | 455 | if (ptid_match (current_thread_ptid, ptid)) |
041274d8 PA |
456 | { |
457 | current_thread_ptid = null_ptid; | |
458 | current_thread_arch = NULL; | |
459 | } | |
32178cab | 460 | |
c34fd852 | 461 | if (ptid_match (inferior_ptid, ptid)) |
041274d8 PA |
462 | { |
463 | /* We just deleted the regcache of the current thread. Need to | |
464 | forget about any frames we have cached, too. */ | |
465 | reinit_frame_cache (); | |
466 | } | |
467 | } | |
c2250ad1 | 468 | |
041274d8 PA |
469 | void |
470 | registers_changed (void) | |
471 | { | |
472 | registers_changed_ptid (minus_one_ptid); | |
a5d9d57d | 473 | |
32178cab MS |
474 | /* Force cleanup of any alloca areas if using C alloca instead of |
475 | a builtin alloca. This particular call is used to clean up | |
476 | areas allocated by low level target code which may build up | |
477 | during lengthy interactions between gdb and the target before | |
478 | gdb gives control to the user (ie watchpoints). */ | |
479 | alloca (0); | |
32178cab MS |
480 | } |
481 | ||
ef79d9a3 YQ |
482 | void |
483 | regcache::raw_update (int regnum) | |
484 | { | |
4e888c28 | 485 | assert_regnum (regnum); |
8e368124 | 486 | |
3fadccb3 AC |
487 | /* Make certain that the register cache is up-to-date with respect |
488 | to the current thread. This switching shouldn't be necessary | |
489 | only there is still only one target side register cache. Sigh! | |
490 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 491 | |
796bb026 | 492 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 493 | { |
ef79d9a3 | 494 | target_fetch_registers (this, regnum); |
788c8b10 PA |
495 | |
496 | /* A number of targets can't access the whole set of raw | |
497 | registers (because the debug API provides no means to get at | |
498 | them). */ | |
ef79d9a3 YQ |
499 | if (m_register_status[regnum] == REG_UNKNOWN) |
500 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 501 | } |
8e368124 AH |
502 | } |
503 | ||
ef79d9a3 | 504 | enum register_status |
849d0ba8 | 505 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
506 | { |
507 | gdb_assert (buf != NULL); | |
ef79d9a3 | 508 | raw_update (regnum); |
05d1431c | 509 | |
ef79d9a3 YQ |
510 | if (m_register_status[regnum] != REG_VALID) |
511 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 512 | else |
ef79d9a3 YQ |
513 | memcpy (buf, register_buffer (regnum), |
514 | m_descr->sizeof_register[regnum]); | |
05d1431c | 515 | |
aac0d564 | 516 | return m_register_status[regnum]; |
61a0eb5b AC |
517 | } |
518 | ||
05d1431c | 519 | enum register_status |
28fc6740 | 520 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
521 | { |
522 | gdb_assert (regcache != NULL); | |
6f98355c | 523 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
524 | } |
525 | ||
6f98355c | 526 | template<typename T, typename> |
ef79d9a3 | 527 | enum register_status |
849d0ba8 | 528 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 529 | { |
2d522557 | 530 | gdb_byte *buf; |
05d1431c | 531 | enum register_status status; |
123f5f96 | 532 | |
4e888c28 | 533 | assert_regnum (regnum); |
ef79d9a3 YQ |
534 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
535 | status = raw_read (regnum, buf); | |
05d1431c | 536 | if (status == REG_VALID) |
6f98355c YQ |
537 | *val = extract_integer<T> (buf, |
538 | m_descr->sizeof_register[regnum], | |
539 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
540 | else |
541 | *val = 0; | |
542 | return status; | |
28fc6740 AC |
543 | } |
544 | ||
05d1431c | 545 | enum register_status |
28fc6740 AC |
546 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
547 | ULONGEST *val) | |
ef79d9a3 YQ |
548 | { |
549 | gdb_assert (regcache != NULL); | |
6f98355c | 550 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
551 | } |
552 | ||
c00dcbe9 MK |
553 | void |
554 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
555 | { |
556 | gdb_assert (regcache != NULL); | |
6f98355c | 557 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
558 | } |
559 | ||
6f98355c | 560 | template<typename T, typename> |
ef79d9a3 | 561 | void |
6f98355c | 562 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 563 | { |
7c543f7b | 564 | gdb_byte *buf; |
123f5f96 | 565 | |
4e888c28 | 566 | assert_regnum (regnum); |
ef79d9a3 | 567 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
568 | store_integer (buf, m_descr->sizeof_register[regnum], |
569 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 570 | raw_write (regnum, buf); |
c00dcbe9 MK |
571 | } |
572 | ||
573 | void | |
574 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
575 | ULONGEST val) | |
ef79d9a3 YQ |
576 | { |
577 | gdb_assert (regcache != NULL); | |
6f98355c | 578 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
579 | } |
580 | ||
9fd15b2e YQ |
581 | LONGEST |
582 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
583 | { | |
584 | LONGEST value; | |
585 | enum register_status status; | |
586 | ||
587 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
588 | if (status == REG_UNAVAILABLE) | |
589 | throw_error (NOT_AVAILABLE_ERROR, | |
590 | _("Register %d is not available"), regnum); | |
591 | return value; | |
592 | } | |
593 | ||
ef79d9a3 | 594 | enum register_status |
849d0ba8 | 595 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 596 | { |
d138e37a | 597 | gdb_assert (regnum >= 0); |
ef79d9a3 | 598 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 599 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 600 | return raw_read (regnum, buf); |
849d0ba8 | 601 | else if (m_has_pseudo |
ef79d9a3 | 602 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 603 | { |
ef79d9a3 YQ |
604 | if (m_register_status[regnum] == REG_VALID) |
605 | memcpy (buf, register_buffer (regnum), | |
606 | m_descr->sizeof_register[regnum]); | |
05d1431c | 607 | else |
ef79d9a3 | 608 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 609 | |
aac0d564 | 610 | return m_register_status[regnum]; |
05d1431c | 611 | } |
ef79d9a3 | 612 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
613 | { |
614 | struct value *mark, *computed; | |
615 | enum register_status result = REG_VALID; | |
616 | ||
617 | mark = value_mark (); | |
618 | ||
ef79d9a3 YQ |
619 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
620 | this, regnum); | |
3543a589 TT |
621 | if (value_entirely_available (computed)) |
622 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 623 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
624 | else |
625 | { | |
ef79d9a3 | 626 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
627 | result = REG_UNAVAILABLE; |
628 | } | |
629 | ||
630 | value_free_to_mark (mark); | |
631 | ||
632 | return result; | |
633 | } | |
d138e37a | 634 | else |
ef79d9a3 | 635 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 636 | regnum, buf); |
61a0eb5b AC |
637 | } |
638 | ||
ef79d9a3 | 639 | struct value * |
849d0ba8 | 640 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
641 | { |
642 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 643 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 644 | |
d999647b | 645 | if (regnum < num_raw_registers () |
849d0ba8 | 646 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 647 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
648 | { |
649 | struct value *result; | |
650 | ||
ef79d9a3 | 651 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
652 | VALUE_LVAL (result) = lval_register; |
653 | VALUE_REGNUM (result) = regnum; | |
654 | ||
655 | /* It is more efficient in general to do this delegation in this | |
656 | direction than in the other one, even though the value-based | |
657 | API is preferred. */ | |
ef79d9a3 YQ |
658 | if (cooked_read (regnum, |
659 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
660 | mark_value_bytes_unavailable (result, 0, |
661 | TYPE_LENGTH (value_type (result))); | |
662 | ||
663 | return result; | |
664 | } | |
665 | else | |
ef79d9a3 YQ |
666 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
667 | this, regnum); | |
3543a589 TT |
668 | } |
669 | ||
05d1431c | 670 | enum register_status |
a378f419 AC |
671 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
672 | LONGEST *val) | |
ef79d9a3 YQ |
673 | { |
674 | gdb_assert (regcache != NULL); | |
6f98355c | 675 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
676 | } |
677 | ||
6f98355c | 678 | template<typename T, typename> |
ef79d9a3 | 679 | enum register_status |
849d0ba8 | 680 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 681 | { |
05d1431c | 682 | enum register_status status; |
2d522557 | 683 | gdb_byte *buf; |
123f5f96 | 684 | |
ef79d9a3 YQ |
685 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
686 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
687 | status = cooked_read (regnum, buf); | |
05d1431c | 688 | if (status == REG_VALID) |
6f98355c YQ |
689 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
690 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
691 | else |
692 | *val = 0; | |
693 | return status; | |
a378f419 AC |
694 | } |
695 | ||
05d1431c | 696 | enum register_status |
a378f419 AC |
697 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
698 | ULONGEST *val) | |
ef79d9a3 YQ |
699 | { |
700 | gdb_assert (regcache != NULL); | |
6f98355c | 701 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
702 | } |
703 | ||
a66a9c23 AC |
704 | void |
705 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
706 | LONGEST val) | |
ef79d9a3 YQ |
707 | { |
708 | gdb_assert (regcache != NULL); | |
6f98355c | 709 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
710 | } |
711 | ||
6f98355c | 712 | template<typename T, typename> |
ef79d9a3 | 713 | void |
6f98355c | 714 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 715 | { |
7c543f7b | 716 | gdb_byte *buf; |
123f5f96 | 717 | |
ef79d9a3 YQ |
718 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
719 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
720 | store_integer (buf, m_descr->sizeof_register[regnum], |
721 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 722 | cooked_write (regnum, buf); |
a66a9c23 AC |
723 | } |
724 | ||
725 | void | |
726 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
727 | ULONGEST val) | |
ef79d9a3 YQ |
728 | { |
729 | gdb_assert (regcache != NULL); | |
6f98355c | 730 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
731 | } |
732 | ||
ef79d9a3 YQ |
733 | void |
734 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 735 | { |
594f7785 | 736 | |
ef79d9a3 | 737 | gdb_assert (buf != NULL); |
4e888c28 | 738 | assert_regnum (regnum); |
3fadccb3 | 739 | |
3fadccb3 AC |
740 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
741 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 742 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
743 | return; |
744 | ||
3fadccb3 | 745 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 746 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
747 | if (get_register_status (regnum) == REG_VALID |
748 | && (memcmp (register_buffer (regnum), buf, | |
749 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
750 | return; |
751 | ||
ef79d9a3 | 752 | target_prepare_to_store (this); |
c8ec2f33 | 753 | raw_supply (regnum, buf); |
b94ade42 | 754 | |
b292235f TT |
755 | /* Invalidate the register after it is written, in case of a |
756 | failure. */ | |
757 | regcache_invalidator invalidator (this, regnum); | |
b94ade42 | 758 | |
ef79d9a3 | 759 | target_store_registers (this, regnum); |
594f7785 | 760 | |
b292235f TT |
761 | /* The target did not throw an error so we can discard invalidating |
762 | the register. */ | |
763 | invalidator.release (); | |
61a0eb5b AC |
764 | } |
765 | ||
ef79d9a3 YQ |
766 | void |
767 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 768 | { |
d138e37a | 769 | gdb_assert (regnum >= 0); |
ef79d9a3 | 770 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 771 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 772 | raw_write (regnum, buf); |
d138e37a | 773 | else |
ef79d9a3 | 774 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 775 | regnum, buf); |
61a0eb5b AC |
776 | } |
777 | ||
06c0b04e AC |
778 | /* Perform a partial register transfer using a read, modify, write |
779 | operation. */ | |
780 | ||
ef79d9a3 | 781 | enum register_status |
849d0ba8 YQ |
782 | readable_regcache::read_part (int regnum, int offset, int len, void *in, |
783 | bool is_raw) | |
784 | { | |
785 | struct gdbarch *gdbarch = arch (); | |
786 | gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); | |
787 | ||
788 | gdb_assert (in != NULL); | |
789 | gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); | |
790 | gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); | |
791 | /* Something to do? */ | |
792 | if (offset + len == 0) | |
793 | return REG_VALID; | |
794 | /* Read (when needed) ... */ | |
795 | enum register_status status; | |
796 | ||
797 | if (is_raw) | |
798 | status = raw_read (regnum, reg); | |
799 | else | |
800 | status = cooked_read (regnum, reg); | |
801 | if (status != REG_VALID) | |
802 | return status; | |
803 | ||
804 | /* ... modify ... */ | |
805 | memcpy (in, reg + offset, len); | |
806 | ||
807 | return REG_VALID; | |
808 | } | |
809 | ||
810 | enum register_status | |
811 | regcache::write_part (int regnum, int offset, int len, | |
d3037ba6 | 812 | const void *out, bool is_raw) |
ef79d9a3 YQ |
813 | { |
814 | struct gdbarch *gdbarch = arch (); | |
9890e433 | 815 | gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); |
123f5f96 | 816 | |
849d0ba8 | 817 | gdb_assert (out != NULL); |
ef79d9a3 YQ |
818 | gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); |
819 | gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); | |
06c0b04e AC |
820 | /* Something to do? */ |
821 | if (offset + len == 0) | |
05d1431c | 822 | return REG_VALID; |
0df8b418 | 823 | /* Read (when needed) ... */ |
849d0ba8 | 824 | if (offset > 0 |
ef79d9a3 | 825 | || offset + len < m_descr->sizeof_register[regnum]) |
06c0b04e | 826 | { |
05d1431c PA |
827 | enum register_status status; |
828 | ||
d3037ba6 YQ |
829 | if (is_raw) |
830 | status = raw_read (regnum, reg); | |
831 | else | |
832 | status = cooked_read (regnum, reg); | |
05d1431c PA |
833 | if (status != REG_VALID) |
834 | return status; | |
06c0b04e | 835 | } |
849d0ba8 YQ |
836 | |
837 | memcpy (reg + offset, out, len); | |
06c0b04e | 838 | /* ... write (when needed). */ |
849d0ba8 YQ |
839 | if (is_raw) |
840 | raw_write (regnum, reg); | |
841 | else | |
842 | cooked_write (regnum, reg); | |
05d1431c PA |
843 | |
844 | return REG_VALID; | |
06c0b04e AC |
845 | } |
846 | ||
ef79d9a3 | 847 | enum register_status |
849d0ba8 | 848 | readable_regcache::raw_read_part (int regnum, int offset, int len, gdb_byte *buf) |
ef79d9a3 | 849 | { |
4e888c28 | 850 | assert_regnum (regnum); |
849d0ba8 | 851 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
852 | } |
853 | ||
4f0420fd | 854 | /* See regcache.h. */ |
123f5f96 | 855 | |
ef79d9a3 YQ |
856 | void |
857 | regcache::raw_write_part (int regnum, int offset, int len, | |
858 | const gdb_byte *buf) | |
859 | { | |
4e888c28 | 860 | assert_regnum (regnum); |
849d0ba8 | 861 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
862 | } |
863 | ||
ef79d9a3 | 864 | enum register_status |
849d0ba8 YQ |
865 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
866 | gdb_byte *buf) | |
ef79d9a3 YQ |
867 | { |
868 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 869 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
870 | } |
871 | ||
ef79d9a3 YQ |
872 | void |
873 | regcache::cooked_write_part (int regnum, int offset, int len, | |
874 | const gdb_byte *buf) | |
875 | { | |
876 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 877 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 878 | } |
32178cab | 879 | |
9c861883 AH |
880 | /* See common/common-regcache.h. */ |
881 | ||
ef79d9a3 | 882 | void |
9c861883 | 883 | reg_buffer::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
884 | { |
885 | void *regbuf; | |
886 | size_t size; | |
887 | ||
4e888c28 | 888 | assert_regnum (regnum); |
9a661b68 | 889 | |
ef79d9a3 YQ |
890 | regbuf = register_buffer (regnum); |
891 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
892 | |
893 | if (buf) | |
ee99023e PA |
894 | { |
895 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 896 | m_register_status[regnum] = REG_VALID; |
ee99023e | 897 | } |
9a661b68 | 898 | else |
ee99023e PA |
899 | { |
900 | /* This memset not strictly necessary, but better than garbage | |
901 | in case the register value manages to escape somewhere (due | |
902 | to a bug, no less). */ | |
903 | memset (regbuf, 0, size); | |
ef79d9a3 | 904 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 905 | } |
9a661b68 MK |
906 | } |
907 | ||
9c861883 | 908 | /* See regcache.h. */ |
b057297a AH |
909 | |
910 | void | |
9c861883 AH |
911 | reg_buffer::raw_supply_integer (int regnum, const gdb_byte *addr, |
912 | int addr_len, bool is_signed) | |
b057297a AH |
913 | { |
914 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
915 | gdb_byte *regbuf; | |
916 | size_t regsize; | |
917 | ||
4e888c28 | 918 | assert_regnum (regnum); |
b057297a AH |
919 | |
920 | regbuf = register_buffer (regnum); | |
921 | regsize = m_descr->sizeof_register[regnum]; | |
922 | ||
923 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
924 | byte_order); | |
925 | m_register_status[regnum] = REG_VALID; | |
926 | } | |
927 | ||
9c861883 | 928 | /* See regcache.h. */ |
f81fdd35 AH |
929 | |
930 | void | |
9c861883 | 931 | reg_buffer::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
932 | { |
933 | void *regbuf; | |
934 | size_t size; | |
935 | ||
4e888c28 | 936 | assert_regnum (regnum); |
f81fdd35 AH |
937 | |
938 | regbuf = register_buffer (regnum); | |
939 | size = m_descr->sizeof_register[regnum]; | |
940 | ||
941 | memset (regbuf, 0, size); | |
942 | m_register_status[regnum] = REG_VALID; | |
943 | } | |
944 | ||
9c861883 AH |
945 | /* See common/common-regcache.h. */ |
946 | ||
ef79d9a3 | 947 | void |
9c861883 | 948 | reg_buffer::raw_collect (int regnum, void *buf) const |
9a661b68 MK |
949 | { |
950 | const void *regbuf; | |
951 | size_t size; | |
952 | ||
ef79d9a3 | 953 | gdb_assert (buf != NULL); |
4e888c28 | 954 | assert_regnum (regnum); |
9a661b68 | 955 | |
ef79d9a3 YQ |
956 | regbuf = register_buffer (regnum); |
957 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
958 | memcpy (buf, regbuf, size); |
959 | } | |
960 | ||
9c861883 | 961 | /* See regcache.h. */ |
b057297a AH |
962 | |
963 | void | |
9c861883 AH |
964 | reg_buffer::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
965 | bool is_signed) const | |
b057297a AH |
966 | { |
967 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
968 | const gdb_byte *regbuf; | |
969 | size_t regsize; | |
970 | ||
4e888c28 | 971 | assert_regnum (regnum); |
b057297a AH |
972 | |
973 | regbuf = register_buffer (regnum); | |
974 | regsize = m_descr->sizeof_register[regnum]; | |
975 | ||
976 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
977 | byte_order); | |
978 | } | |
979 | ||
9c861883 AH |
980 | /* Transfer a single or all registers belonging to a certain register |
981 | set to or from a buffer. This is the main worker function for | |
982 | regcache_supply_regset and regcache_collect_regset. */ | |
983 | ||
ef79d9a3 YQ |
984 | void |
985 | regcache::transfer_regset (const struct regset *regset, | |
986 | struct regcache *out_regcache, | |
987 | int regnum, const void *in_buf, | |
988 | void *out_buf, size_t size) const | |
0b309272 AA |
989 | { |
990 | const struct regcache_map_entry *map; | |
991 | int offs = 0, count; | |
992 | ||
19ba03f4 SM |
993 | for (map = (const struct regcache_map_entry *) regset->regmap; |
994 | (count = map->count) != 0; | |
995 | map++) | |
0b309272 AA |
996 | { |
997 | int regno = map->regno; | |
998 | int slot_size = map->size; | |
999 | ||
1000 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1001 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1002 | |
1003 | if (regno == REGCACHE_MAP_SKIP | |
1004 | || (regnum != -1 | |
1005 | && (regnum < regno || regnum >= regno + count))) | |
1006 | offs += count * slot_size; | |
1007 | ||
1008 | else if (regnum == -1) | |
1009 | for (; count--; regno++, offs += slot_size) | |
1010 | { | |
1011 | if (offs + slot_size > size) | |
1012 | break; | |
1013 | ||
1014 | if (out_buf) | |
ef79d9a3 | 1015 | raw_collect (regno, (gdb_byte *) out_buf + offs); |
0b309272 | 1016 | else |
ef79d9a3 YQ |
1017 | out_regcache->raw_supply (regno, in_buf |
1018 | ? (const gdb_byte *) in_buf + offs | |
1019 | : NULL); | |
0b309272 AA |
1020 | } |
1021 | else | |
1022 | { | |
1023 | /* Transfer a single register and return. */ | |
1024 | offs += (regnum - regno) * slot_size; | |
1025 | if (offs + slot_size > size) | |
1026 | return; | |
1027 | ||
1028 | if (out_buf) | |
ef79d9a3 | 1029 | raw_collect (regnum, (gdb_byte *) out_buf + offs); |
0b309272 | 1030 | else |
ef79d9a3 YQ |
1031 | out_regcache->raw_supply (regnum, in_buf |
1032 | ? (const gdb_byte *) in_buf + offs | |
1033 | : NULL); | |
0b309272 AA |
1034 | return; |
1035 | } | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1040 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1041 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1042 | ||
1043 | void | |
1044 | regcache_supply_regset (const struct regset *regset, | |
1045 | struct regcache *regcache, | |
1046 | int regnum, const void *buf, size_t size) | |
1047 | { | |
ef79d9a3 YQ |
1048 | regcache->supply_regset (regset, regnum, buf, size); |
1049 | } | |
1050 | ||
1051 | void | |
1052 | regcache::supply_regset (const struct regset *regset, | |
1053 | int regnum, const void *buf, size_t size) | |
1054 | { | |
1055 | transfer_regset (regset, this, regnum, buf, NULL, size); | |
0b309272 AA |
1056 | } |
1057 | ||
1058 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1059 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1060 | REGSET. */ | |
1061 | ||
1062 | void | |
1063 | regcache_collect_regset (const struct regset *regset, | |
1064 | const struct regcache *regcache, | |
1065 | int regnum, void *buf, size_t size) | |
1066 | { | |
ef79d9a3 YQ |
1067 | regcache->collect_regset (regset, regnum, buf, size); |
1068 | } | |
1069 | ||
1070 | void | |
1071 | regcache::collect_regset (const struct regset *regset, | |
1072 | int regnum, void *buf, size_t size) const | |
1073 | { | |
1074 | transfer_regset (regset, NULL, regnum, NULL, buf, size); | |
0b309272 AA |
1075 | } |
1076 | ||
f868386e AH |
1077 | /* See common/common-regcache.h. */ |
1078 | ||
1079 | bool | |
1080 | reg_buffer::raw_compare (int regnum, const void *buf, int offset) const | |
1081 | { | |
1082 | gdb_assert (buf != NULL); | |
1083 | assert_regnum (regnum); | |
1084 | ||
1085 | const char *regbuf = (const char *) register_buffer (regnum); | |
1086 | size_t size = m_descr->sizeof_register[regnum]; | |
1087 | gdb_assert (size >= offset); | |
1088 | ||
1089 | return (memcmp (buf, regbuf + offset, size - offset) == 0); | |
1090 | } | |
193cb69f | 1091 | |
515630c5 | 1092 | /* Special handling for register PC. */ |
32178cab MS |
1093 | |
1094 | CORE_ADDR | |
515630c5 | 1095 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1096 | { |
ac7936df | 1097 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1098 | |
32178cab MS |
1099 | CORE_ADDR pc_val; |
1100 | ||
61a1198a UW |
1101 | if (gdbarch_read_pc_p (gdbarch)) |
1102 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1103 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1104 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1105 | { |
61a1198a | 1106 | ULONGEST raw_val; |
123f5f96 | 1107 | |
05d1431c PA |
1108 | if (regcache_cooked_read_unsigned (regcache, |
1109 | gdbarch_pc_regnum (gdbarch), | |
1110 | &raw_val) == REG_UNAVAILABLE) | |
1111 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1112 | ||
214e098a | 1113 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1114 | } |
1115 | else | |
515630c5 UW |
1116 | internal_error (__FILE__, __LINE__, |
1117 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1118 | return pc_val; |
1119 | } | |
1120 | ||
32178cab | 1121 | void |
515630c5 | 1122 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1123 | { |
ac7936df | 1124 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1125 | |
61a1198a UW |
1126 | if (gdbarch_write_pc_p (gdbarch)) |
1127 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1128 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1129 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1130 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1131 | else |
1132 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1133 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1134 | |
1135 | /* Writing the PC (for instance, from "load") invalidates the | |
1136 | current frame. */ | |
1137 | reinit_frame_cache (); | |
32178cab MS |
1138 | } |
1139 | ||
d999647b | 1140 | int |
31716595 | 1141 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1142 | { |
1143 | return gdbarch_num_regs (arch ()); | |
1144 | } | |
1145 | ||
ed771251 | 1146 | void |
ef79d9a3 | 1147 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1148 | { |
ef79d9a3 | 1149 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1150 | |
1151 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1152 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1153 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1154 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1155 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1156 | gdbarch_register_name (gdbarch, regno)); | |
1157 | else | |
1158 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1159 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1160 | { | |
1161 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1162 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1163 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1164 | |
1165 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1166 | for (int i = 0; i < size; i++) | |
1167 | { | |
1168 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1169 | } | |
1170 | if (size <= sizeof (LONGEST)) | |
1171 | { | |
1172 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1173 | ||
1174 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1175 | core_addr_to_string_nz (val), plongest (val)); | |
1176 | } | |
1177 | } | |
1178 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1179 | } | |
32178cab | 1180 | |
705152c5 | 1181 | static void |
0b39b52e | 1182 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1183 | { |
1184 | /* Force-flush the register cache. */ | |
1185 | registers_changed (); | |
1186 | if (from_tty) | |
a3f17187 | 1187 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1188 | } |
1189 | ||
4c74fe6b YQ |
1190 | void |
1191 | register_dump::dump (ui_file *file) | |
af030b9a | 1192 | { |
4c74fe6b YQ |
1193 | auto descr = regcache_descr (m_gdbarch); |
1194 | int regnum; | |
1195 | int footnote_nr = 0; | |
1196 | int footnote_register_offset = 0; | |
1197 | int footnote_register_type_name_null = 0; | |
1198 | long register_offset = 0; | |
af030b9a | 1199 | |
4c74fe6b YQ |
1200 | gdb_assert (descr->nr_cooked_registers |
1201 | == (gdbarch_num_regs (m_gdbarch) | |
1202 | + gdbarch_num_pseudo_regs (m_gdbarch))); | |
af030b9a | 1203 | |
4c74fe6b YQ |
1204 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1205 | { | |
1206 | /* Name. */ | |
1207 | if (regnum < 0) | |
1208 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1209 | else | |
1210 | { | |
1211 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1212 | |
4c74fe6b YQ |
1213 | if (p == NULL) |
1214 | p = ""; | |
1215 | else if (p[0] == '\0') | |
1216 | p = "''"; | |
1217 | fprintf_unfiltered (file, " %-10s", p); | |
1218 | } | |
af030b9a | 1219 | |
4c74fe6b YQ |
1220 | /* Number. */ |
1221 | if (regnum < 0) | |
1222 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1223 | else | |
1224 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1225 | |
4c74fe6b YQ |
1226 | /* Relative number. */ |
1227 | if (regnum < 0) | |
1228 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1229 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1230 | fprintf_unfiltered (file, " %4d", regnum); | |
1231 | else | |
1232 | fprintf_unfiltered (file, " %4d", | |
1233 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1234 | |
4c74fe6b YQ |
1235 | /* Offset. */ |
1236 | if (regnum < 0) | |
1237 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1238 | else | |
af030b9a | 1239 | { |
4c74fe6b YQ |
1240 | fprintf_unfiltered (file, " %6ld", |
1241 | descr->register_offset[regnum]); | |
1242 | if (register_offset != descr->register_offset[regnum] | |
1243 | || (regnum > 0 | |
1244 | && (descr->register_offset[regnum] | |
1245 | != (descr->register_offset[regnum - 1] | |
1246 | + descr->sizeof_register[regnum - 1]))) | |
1247 | ) | |
af030b9a | 1248 | { |
4c74fe6b YQ |
1249 | if (!footnote_register_offset) |
1250 | footnote_register_offset = ++footnote_nr; | |
1251 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1252 | } |
4c74fe6b YQ |
1253 | else |
1254 | fprintf_unfiltered (file, " "); | |
1255 | register_offset = (descr->register_offset[regnum] | |
1256 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1257 | } |
1258 | ||
4c74fe6b YQ |
1259 | /* Size. */ |
1260 | if (regnum < 0) | |
1261 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1262 | else | |
1263 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1264 | |
4c74fe6b | 1265 | /* Type. */ |
f3384e66 | 1266 | { |
4c74fe6b YQ |
1267 | const char *t; |
1268 | std::string name_holder; | |
b59ff9d5 | 1269 | |
4c74fe6b YQ |
1270 | if (regnum < 0) |
1271 | t = "Type"; | |
215c69dc YQ |
1272 | else |
1273 | { | |
4c74fe6b | 1274 | static const char blt[] = "builtin_type"; |
123f5f96 | 1275 | |
4c74fe6b YQ |
1276 | t = TYPE_NAME (register_type (m_gdbarch, regnum)); |
1277 | if (t == NULL) | |
f3384e66 | 1278 | { |
4c74fe6b YQ |
1279 | if (!footnote_register_type_name_null) |
1280 | footnote_register_type_name_null = ++footnote_nr; | |
1281 | name_holder = string_printf ("*%d", | |
1282 | footnote_register_type_name_null); | |
1283 | t = name_holder.c_str (); | |
f3384e66 | 1284 | } |
4c74fe6b YQ |
1285 | /* Chop a leading builtin_type. */ |
1286 | if (startswith (t, blt)) | |
1287 | t += strlen (blt); | |
f3384e66 | 1288 | } |
4c74fe6b | 1289 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1290 | } |
f3384e66 | 1291 | |
4c74fe6b YQ |
1292 | /* Leading space always present. */ |
1293 | fprintf_unfiltered (file, " "); | |
af030b9a | 1294 | |
4c74fe6b | 1295 | dump_reg (file, regnum); |
ed4227b7 | 1296 | |
4c74fe6b | 1297 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1298 | } |
1299 | ||
4c74fe6b YQ |
1300 | if (footnote_register_offset) |
1301 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1302 | footnote_register_offset); | |
1303 | if (footnote_register_type_name_null) | |
1304 | fprintf_unfiltered (file, | |
1305 | "*%d: Register type's name NULL.\n", | |
1306 | footnote_register_type_name_null); | |
c21236dc PA |
1307 | } |
1308 | ||
8248946c YQ |
1309 | #if GDB_SELF_TEST |
1310 | #include "selftest.h" | |
1b30aaa5 YQ |
1311 | #include "selftest-arch.h" |
1312 | #include "gdbthread.h" | |
ec7a5fcb | 1313 | #include "target-float.h" |
8248946c YQ |
1314 | |
1315 | namespace selftests { | |
1316 | ||
e521e87e | 1317 | class regcache_access : public regcache |
8248946c | 1318 | { |
e521e87e YQ |
1319 | public: |
1320 | ||
1321 | /* Return the number of elements in current_regcache. */ | |
1322 | ||
1323 | static size_t | |
1324 | current_regcache_size () | |
1325 | { | |
1326 | return std::distance (regcache::current_regcache.begin (), | |
1327 | regcache::current_regcache.end ()); | |
1328 | } | |
1329 | }; | |
8248946c YQ |
1330 | |
1331 | static void | |
1332 | current_regcache_test (void) | |
1333 | { | |
1334 | /* It is empty at the start. */ | |
e521e87e | 1335 | SELF_CHECK (regcache_access::current_regcache_size () == 0); |
8248946c YQ |
1336 | |
1337 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1338 | ||
1339 | /* Get regcache from ptid1, a new regcache is added to | |
1340 | current_regcache. */ | |
1341 | regcache *regcache = get_thread_arch_aspace_regcache (ptid1, | |
1342 | target_gdbarch (), | |
1343 | NULL); | |
1344 | ||
1345 | SELF_CHECK (regcache != NULL); | |
1346 | SELF_CHECK (regcache->ptid () == ptid1); | |
e521e87e | 1347 | SELF_CHECK (regcache_access::current_regcache_size () == 1); |
8248946c YQ |
1348 | |
1349 | /* Get regcache from ptid2, a new regcache is added to | |
1350 | current_regcache. */ | |
1351 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1352 | target_gdbarch (), | |
1353 | NULL); | |
1354 | SELF_CHECK (regcache != NULL); | |
1355 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1356 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1357 | |
1358 | /* Get regcache from ptid3, a new regcache is added to | |
1359 | current_regcache. */ | |
1360 | regcache = get_thread_arch_aspace_regcache (ptid3, | |
1361 | target_gdbarch (), | |
1362 | NULL); | |
1363 | SELF_CHECK (regcache != NULL); | |
1364 | SELF_CHECK (regcache->ptid () == ptid3); | |
e521e87e | 1365 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1366 | |
1367 | /* Get regcache from ptid2 again, nothing is added to | |
1368 | current_regcache. */ | |
1369 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1370 | target_gdbarch (), | |
1371 | NULL); | |
1372 | SELF_CHECK (regcache != NULL); | |
1373 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1374 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1375 | |
1376 | /* Mark ptid2 is changed, so regcache of ptid2 should be removed from | |
1377 | current_regcache. */ | |
1378 | registers_changed_ptid (ptid2); | |
e521e87e | 1379 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1380 | } |
1381 | ||
1b30aaa5 YQ |
1382 | class target_ops_no_register : public test_target_ops |
1383 | { | |
1384 | public: | |
1385 | target_ops_no_register () | |
1386 | : test_target_ops {} | |
f6ac5f3d | 1387 | {} |
1b30aaa5 YQ |
1388 | |
1389 | void reset () | |
1390 | { | |
1391 | fetch_registers_called = 0; | |
1392 | store_registers_called = 0; | |
1393 | xfer_partial_called = 0; | |
1394 | } | |
1395 | ||
f6ac5f3d PA |
1396 | void fetch_registers (regcache *regs, int regno) override; |
1397 | void store_registers (regcache *regs, int regno) override; | |
1398 | ||
1399 | enum target_xfer_status xfer_partial (enum target_object object, | |
1400 | const char *annex, gdb_byte *readbuf, | |
1401 | const gdb_byte *writebuf, | |
1402 | ULONGEST offset, ULONGEST len, | |
1403 | ULONGEST *xfered_len) override; | |
1404 | ||
1b30aaa5 YQ |
1405 | unsigned int fetch_registers_called = 0; |
1406 | unsigned int store_registers_called = 0; | |
1407 | unsigned int xfer_partial_called = 0; | |
1408 | }; | |
1409 | ||
f6ac5f3d PA |
1410 | void |
1411 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1412 | { |
1b30aaa5 YQ |
1413 | /* Mark register available. */ |
1414 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1415 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1416 | } |
1417 | ||
f6ac5f3d PA |
1418 | void |
1419 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1420 | { |
f6ac5f3d | 1421 | this->store_registers_called++; |
1b30aaa5 YQ |
1422 | } |
1423 | ||
f6ac5f3d PA |
1424 | enum target_xfer_status |
1425 | target_ops_no_register::xfer_partial (enum target_object object, | |
1426 | const char *annex, gdb_byte *readbuf, | |
1427 | const gdb_byte *writebuf, | |
1428 | ULONGEST offset, ULONGEST len, | |
1429 | ULONGEST *xfered_len) | |
1b30aaa5 | 1430 | { |
f6ac5f3d | 1431 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1432 | |
1433 | *xfered_len = len; | |
1434 | return TARGET_XFER_OK; | |
1435 | } | |
1436 | ||
1437 | class readwrite_regcache : public regcache | |
1438 | { | |
1439 | public: | |
1440 | readwrite_regcache (struct gdbarch *gdbarch) | |
796bb026 | 1441 | : regcache (gdbarch, nullptr) |
1b30aaa5 YQ |
1442 | {} |
1443 | }; | |
1444 | ||
1445 | /* Test regcache::cooked_read gets registers from raw registers and | |
1446 | memory instead of target to_{fetch,store}_registers. */ | |
1447 | ||
1448 | static void | |
1449 | cooked_read_test (struct gdbarch *gdbarch) | |
1450 | { | |
1451 | /* Error out if debugging something, because we're going to push the | |
1452 | test target, which would pop any existing target. */ | |
8b88a78e | 1453 | if (current_top_target ()->to_stratum >= process_stratum) |
1b30aaa5 YQ |
1454 | error (_("target already pushed")); |
1455 | ||
1456 | /* Create a mock environment. An inferior with a thread, with a | |
1457 | process_stratum target pushed. */ | |
1458 | ||
1459 | target_ops_no_register mock_target; | |
1460 | ptid_t mock_ptid (1, 1); | |
1461 | inferior mock_inferior (mock_ptid.pid ()); | |
1462 | address_space mock_aspace {}; | |
1463 | mock_inferior.gdbarch = gdbarch; | |
1464 | mock_inferior.aspace = &mock_aspace; | |
1465 | thread_info mock_thread (&mock_inferior, mock_ptid); | |
1466 | ||
1467 | scoped_restore restore_thread_list | |
1468 | = make_scoped_restore (&thread_list, &mock_thread); | |
1469 | ||
1470 | /* Add the mock inferior to the inferior list so that look ups by | |
1471 | target+ptid can find it. */ | |
1472 | scoped_restore restore_inferior_list | |
1473 | = make_scoped_restore (&inferior_list); | |
1474 | inferior_list = &mock_inferior; | |
1475 | ||
1476 | /* Switch to the mock inferior. */ | |
1477 | scoped_restore_current_inferior restore_current_inferior; | |
1478 | set_current_inferior (&mock_inferior); | |
1479 | ||
1480 | /* Push the process_stratum target so we can mock accessing | |
1481 | registers. */ | |
1482 | push_target (&mock_target); | |
1483 | ||
1484 | /* Pop it again on exit (return/exception). */ | |
1485 | struct on_exit | |
1486 | { | |
1487 | ~on_exit () | |
1488 | { | |
1489 | pop_all_targets_at_and_above (process_stratum); | |
1490 | } | |
1491 | } pop_targets; | |
1492 | ||
1493 | /* Switch to the mock thread. */ | |
1494 | scoped_restore restore_inferior_ptid | |
1495 | = make_scoped_restore (&inferior_ptid, mock_ptid); | |
1496 | ||
1497 | /* Test that read one raw register from regcache_no_target will go | |
1498 | to the target layer. */ | |
1499 | int regnum; | |
1500 | ||
1501 | /* Find a raw register which size isn't zero. */ | |
1502 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) | |
1503 | { | |
1504 | if (register_size (gdbarch, regnum) != 0) | |
1505 | break; | |
1506 | } | |
1507 | ||
1508 | readwrite_regcache readwrite (gdbarch); | |
1509 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1510 | ||
1511 | readwrite.raw_read (regnum, buf.data ()); | |
1512 | ||
1513 | /* raw_read calls target_fetch_registers. */ | |
1514 | SELF_CHECK (mock_target.fetch_registers_called > 0); | |
1515 | mock_target.reset (); | |
1516 | ||
1517 | /* Mark all raw registers valid, so the following raw registers | |
1518 | accesses won't go to target. */ | |
1519 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1520 | readwrite.raw_update (i); | |
1521 | ||
1522 | mock_target.reset (); | |
1523 | /* Then, read all raw and pseudo registers, and don't expect calling | |
1524 | to_{fetch,store}_registers. */ | |
1525 | for (int regnum = 0; | |
1526 | regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); | |
1527 | regnum++) | |
1528 | { | |
1529 | if (register_size (gdbarch, regnum) == 0) | |
1530 | continue; | |
1531 | ||
1532 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1533 | ||
1534 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, buf.data ())); | |
1535 | ||
dc711524 YQ |
1536 | SELF_CHECK (mock_target.fetch_registers_called == 0); |
1537 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1b30aaa5 YQ |
1538 | |
1539 | /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */ | |
1540 | if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu) | |
1541 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1542 | ||
1543 | mock_target.reset (); | |
1544 | } | |
a63f2d2f | 1545 | |
215c69dc | 1546 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1547 | |
1548 | /* GDB may go to target layer to fetch all registers and memory for | |
1549 | readonly regcache. */ | |
1550 | mock_target.reset (); | |
1551 | ||
1552 | for (int regnum = 0; | |
1553 | regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); | |
1554 | regnum++) | |
1555 | { | |
a63f2d2f YQ |
1556 | if (register_size (gdbarch, regnum) == 0) |
1557 | continue; | |
1558 | ||
1559 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1560 | enum register_status status = readonly.cooked_read (regnum, | |
1561 | buf.data ()); | |
1562 | ||
1563 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1564 | { | |
1565 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1566 | ||
1567 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1568 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1569 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1570 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1571 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1572 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 AB |
1573 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
1574 | || bfd_arch == bfd_arch_riscv) | |
a63f2d2f YQ |
1575 | { |
1576 | /* Raw registers. If raw registers are not in save_reggroup, | |
1577 | their status are unknown. */ | |
1578 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1579 | SELF_CHECK (status == REG_VALID); | |
1580 | else | |
1581 | SELF_CHECK (status == REG_UNKNOWN); | |
1582 | } | |
1583 | else | |
1584 | SELF_CHECK (status == REG_VALID); | |
1585 | } | |
1586 | else | |
1587 | { | |
1588 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1589 | SELF_CHECK (status == REG_VALID); | |
1590 | else | |
1591 | { | |
1592 | /* If pseudo registers are not in save_reggroup, some of | |
1593 | them can be computed from saved raw registers, but some | |
1594 | of them are unknown. */ | |
1595 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1596 | ||
1597 | if (bfd_arch == bfd_arch_frv | |
1598 | || bfd_arch == bfd_arch_m32c | |
1599 | || bfd_arch == bfd_arch_mep | |
1600 | || bfd_arch == bfd_arch_sh) | |
1601 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1602 | else if (bfd_arch == bfd_arch_mips | |
1603 | || bfd_arch == bfd_arch_h8300) | |
1604 | SELF_CHECK (status == REG_UNKNOWN); | |
1605 | else | |
1606 | SELF_CHECK (status == REG_VALID); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | SELF_CHECK (mock_target.fetch_registers_called == 0); | |
1611 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1612 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1613 | ||
1614 | mock_target.reset (); | |
1615 | } | |
1b30aaa5 YQ |
1616 | } |
1617 | ||
ec7a5fcb YQ |
1618 | /* Test regcache::cooked_write by writing some expected contents to |
1619 | registers, and checking that contents read from registers and the | |
1620 | expected contents are the same. */ | |
1621 | ||
1622 | static void | |
1623 | cooked_write_test (struct gdbarch *gdbarch) | |
1624 | { | |
1625 | /* Error out if debugging something, because we're going to push the | |
1626 | test target, which would pop any existing target. */ | |
8b88a78e | 1627 | if (current_top_target ()->to_stratum >= process_stratum) |
ec7a5fcb YQ |
1628 | error (_("target already pushed")); |
1629 | ||
1630 | /* Create a mock environment. A process_stratum target pushed. */ | |
1631 | ||
1632 | target_ops_no_register mock_target; | |
1633 | ||
1634 | /* Push the process_stratum target so we can mock accessing | |
1635 | registers. */ | |
1636 | push_target (&mock_target); | |
1637 | ||
1638 | /* Pop it again on exit (return/exception). */ | |
1639 | struct on_exit | |
1640 | { | |
1641 | ~on_exit () | |
1642 | { | |
1643 | pop_all_targets_at_and_above (process_stratum); | |
1644 | } | |
1645 | } pop_targets; | |
1646 | ||
1647 | readwrite_regcache readwrite (gdbarch); | |
1648 | ||
1649 | const int num_regs = (gdbarch_num_regs (gdbarch) | |
1650 | + gdbarch_num_pseudo_regs (gdbarch)); | |
1651 | ||
1652 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1653 | { | |
1654 | if (register_size (gdbarch, regnum) == 0 | |
1655 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1656 | continue; | |
1657 | ||
1658 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1659 | ||
1660 | if ((bfd_arch == bfd_arch_sparc | |
1661 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1662 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1663 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1664 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1665 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1666 | || (bfd_arch == bfd_arch_spu |
1667 | /* SPU pseudo registers except SPU_SP_REGNUM are got by | |
1668 | TARGET_OBJECT_SPU. */ | |
1669 | && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130)) | |
1670 | continue; | |
1671 | ||
1672 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1673 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1674 | const auto type = register_type (gdbarch, regnum); | |
1675 | ||
1676 | if (TYPE_CODE (type) == TYPE_CODE_FLT | |
1677 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
1678 | { | |
1679 | /* Generate valid float format. */ | |
1680 | target_float_from_string (expected.data (), type, "1.25"); | |
1681 | } | |
1682 | else if (TYPE_CODE (type) == TYPE_CODE_INT | |
1683 | || TYPE_CODE (type) == TYPE_CODE_ARRAY | |
1684 | || TYPE_CODE (type) == TYPE_CODE_PTR | |
1685 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
1686 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
1687 | { | |
1688 | if (bfd_arch == bfd_arch_ia64 | |
1689 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1690 | && (bfd_arch == bfd_arch_xtensa | |
1691 | || bfd_arch == bfd_arch_bfin | |
1692 | || bfd_arch == bfd_arch_m32c | |
1693 | /* m68hc11 pseudo registers are in memory. */ | |
1694 | || bfd_arch == bfd_arch_m68hc11 | |
1695 | || bfd_arch == bfd_arch_m68hc12 | |
1696 | || bfd_arch == bfd_arch_s390)) | |
1697 | || (bfd_arch == bfd_arch_frv | |
1698 | /* FRV pseudo registers except iacc0. */ | |
1699 | && regnum > gdbarch_num_regs (gdbarch))) | |
1700 | { | |
1701 | /* Skip setting the expected values for some architecture | |
1702 | registers. */ | |
1703 | } | |
1704 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1705 | { | |
1706 | /* RL78_PC_REGNUM */ | |
1707 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1708 | expected[j] = j; | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1713 | expected[j] = j; | |
1714 | } | |
1715 | } | |
1716 | else if (TYPE_CODE (type) == TYPE_CODE_FLAGS) | |
1717 | { | |
1718 | /* No idea how to test flags. */ | |
1719 | continue; | |
1720 | } | |
1721 | else | |
1722 | { | |
1723 | /* If we don't know how to create the expected value for the | |
1724 | this type, make it fail. */ | |
1725 | SELF_CHECK (0); | |
1726 | } | |
1727 | ||
1728 | readwrite.cooked_write (regnum, expected.data ()); | |
1729 | ||
1730 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1731 | SELF_CHECK (expected == buf); | |
1732 | } | |
1733 | } | |
1734 | ||
8248946c YQ |
1735 | } // namespace selftests |
1736 | #endif /* GDB_SELF_TEST */ | |
1737 | ||
32178cab MS |
1738 | void |
1739 | _initialize_regcache (void) | |
1740 | { | |
3e43a32a MS |
1741 | regcache_descr_handle |
1742 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1743 | |
76727919 TT |
1744 | gdb::observers::target_changed.attach (regcache_observer_target_changed); |
1745 | gdb::observers::thread_ptid_changed.attach | |
1746 | (regcache::regcache_thread_ptid_changed); | |
f4c5303c | 1747 | |
705152c5 | 1748 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1bedd215 | 1749 | _("Force gdb to flush its register cache (maintainer command)")); |
39f77062 | 1750 | |
8248946c | 1751 | #if GDB_SELF_TEST |
1526853e | 1752 | selftests::register_test ("current_regcache", selftests::current_regcache_test); |
1b30aaa5 YQ |
1753 | |
1754 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1755 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1756 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1757 | selftests::cooked_write_test); | |
8248946c | 1758 | #endif |
32178cab | 1759 | } |