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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 | { |
ef79d9a3 YQ |
188 | m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_cooked_registers); |
189 | m_register_status = XCNEWVEC (signed char, | |
6c5218df | 190 | m_descr->nr_cooked_registers); |
4621115f YQ |
191 | } |
192 | else | |
193 | { | |
ef79d9a3 | 194 | m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_raw_registers); |
d999647b | 195 | m_register_status = XCNEWVEC (signed char, gdbarch_num_regs (gdbarch)); |
4621115f | 196 | } |
31716595 YQ |
197 | } |
198 | ||
796bb026 YQ |
199 | regcache::regcache (gdbarch *gdbarch, const address_space *aspace_) |
200 | /* The register buffers. A read/write register cache can only hold | |
201 | [0 .. gdbarch_num_regs). */ | |
202 | : detached_regcache (gdbarch, false), m_aspace (aspace_) | |
31716595 | 203 | { |
ef79d9a3 YQ |
204 | m_ptid = minus_one_ptid; |
205 | } | |
4621115f | 206 | |
deb1fa3e YQ |
207 | static enum register_status |
208 | do_cooked_read (void *src, int regnum, gdb_byte *buf) | |
209 | { | |
210 | struct regcache *regcache = (struct regcache *) src; | |
211 | ||
212 | return regcache_cooked_read (regcache, regnum, buf); | |
213 | } | |
214 | ||
daf6667d YQ |
215 | readonly_detached_regcache::readonly_detached_regcache (const regcache &src) |
216 | : readonly_detached_regcache (src.arch (), do_cooked_read, (void *) &src) | |
217 | { | |
218 | } | |
219 | ||
ef79d9a3 | 220 | gdbarch * |
31716595 | 221 | reg_buffer::arch () const |
ef79d9a3 YQ |
222 | { |
223 | return m_descr->gdbarch; | |
224 | } | |
3fadccb3 | 225 | |
b292235f | 226 | /* Cleanup class for invalidating a register. */ |
b94ade42 | 227 | |
b292235f | 228 | class regcache_invalidator |
b94ade42 | 229 | { |
b292235f | 230 | public: |
b94ade42 | 231 | |
b292235f TT |
232 | regcache_invalidator (struct regcache *regcache, int regnum) |
233 | : m_regcache (regcache), | |
234 | m_regnum (regnum) | |
235 | { | |
236 | } | |
b94ade42 | 237 | |
b292235f TT |
238 | ~regcache_invalidator () |
239 | { | |
240 | if (m_regcache != nullptr) | |
241 | regcache_invalidate (m_regcache, m_regnum); | |
242 | } | |
b94ade42 | 243 | |
b292235f | 244 | DISABLE_COPY_AND_ASSIGN (regcache_invalidator); |
b94ade42 | 245 | |
b292235f TT |
246 | void release () |
247 | { | |
248 | m_regcache = nullptr; | |
249 | } | |
250 | ||
251 | private: | |
252 | ||
253 | struct regcache *m_regcache; | |
254 | int m_regnum; | |
255 | }; | |
b94ade42 | 256 | |
51b1fe4e AC |
257 | /* Return a pointer to register REGNUM's buffer cache. */ |
258 | ||
ef79d9a3 | 259 | gdb_byte * |
31716595 | 260 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 261 | { |
ef79d9a3 | 262 | return m_registers + m_descr->register_offset[regnum]; |
51b1fe4e AC |
263 | } |
264 | ||
ef79d9a3 | 265 | void |
daf6667d YQ |
266 | reg_buffer::save (regcache_cooked_read_ftype *cooked_read, |
267 | void *src) | |
ef79d9a3 YQ |
268 | { |
269 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 270 | int regnum; |
123f5f96 | 271 | |
daf6667d YQ |
272 | /* It should have pseudo registers. */ |
273 | gdb_assert (m_has_pseudo); | |
2d28509a | 274 | /* Clear the dest. */ |
ef79d9a3 | 275 | memset (m_registers, 0, m_descr->sizeof_cooked_registers); |
6c5218df | 276 | memset (m_register_status, 0, m_descr->nr_cooked_registers); |
2d28509a | 277 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
278 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
279 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 280 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 281 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
282 | { |
283 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
284 | { | |
50d6adef AH |
285 | gdb_byte *dst_buf = register_buffer (regnum); |
286 | enum register_status status = cooked_read (src, regnum, dst_buf); | |
123f5f96 | 287 | |
50d6adef AH |
288 | gdb_assert (status != REG_UNKNOWN); |
289 | ||
290 | if (status != REG_VALID) | |
291 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 292 | |
ef79d9a3 | 293 | m_register_status[regnum] = status; |
2d28509a AC |
294 | } |
295 | } | |
296 | } | |
297 | ||
ef79d9a3 | 298 | void |
daf6667d | 299 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 300 | { |
ef79d9a3 | 301 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 302 | int regnum; |
123f5f96 | 303 | |
fc5b8736 | 304 | gdb_assert (src != NULL); |
daf6667d | 305 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
306 | |
307 | gdb_assert (gdbarch == src->arch ()); | |
308 | ||
2d28509a | 309 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
310 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
311 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 312 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 313 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 314 | { |
5602984a | 315 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 316 | { |
ef79d9a3 YQ |
317 | if (src->m_register_status[regnum] == REG_VALID) |
318 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
319 | } |
320 | } | |
321 | } | |
322 | ||
ef79d9a3 | 323 | enum register_status |
c8ec2f33 | 324 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 325 | { |
c8ec2f33 | 326 | assert_regnum (regnum); |
6ed7ea50 | 327 | |
ef79d9a3 | 328 | return (enum register_status) m_register_status[regnum]; |
3fadccb3 AC |
329 | } |
330 | ||
9c5ea4d9 UW |
331 | void |
332 | regcache_invalidate (struct regcache *regcache, int regnum) | |
333 | { | |
334 | gdb_assert (regcache != NULL); | |
ef79d9a3 | 335 | regcache->invalidate (regnum); |
9c5ea4d9 UW |
336 | } |
337 | ||
ef79d9a3 | 338 | void |
796bb026 | 339 | detached_regcache::invalidate (int regnum) |
ef79d9a3 | 340 | { |
4e888c28 | 341 | assert_regnum (regnum); |
ef79d9a3 YQ |
342 | m_register_status[regnum] = REG_UNKNOWN; |
343 | } | |
9c5ea4d9 | 344 | |
4e888c28 | 345 | void |
31716595 | 346 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 347 | { |
31716595 YQ |
348 | gdb_assert (regnum >= 0); |
349 | if (m_has_pseudo) | |
350 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
351 | else | |
352 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
353 | } |
354 | ||
3fadccb3 | 355 | /* Global structure containing the current regcache. */ |
3fadccb3 | 356 | |
5ebd2499 | 357 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
358 | recording if the register values have been changed (eg. by the |
359 | user). Therefore all registers must be written back to the | |
360 | target when appropriate. */ | |
e521e87e | 361 | std::forward_list<regcache *> regcache::current_regcache; |
c2250ad1 UW |
362 | |
363 | struct regcache * | |
e2d96639 YQ |
364 | get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch, |
365 | struct address_space *aspace) | |
c2250ad1 | 366 | { |
e521e87e | 367 | for (const auto ®cache : regcache::current_regcache) |
94bb8dfe YQ |
368 | if (ptid_equal (regcache->ptid (), ptid) && regcache->arch () == gdbarch) |
369 | return regcache; | |
594f7785 | 370 | |
796bb026 | 371 | regcache *new_regcache = new regcache (gdbarch, aspace); |
594f7785 | 372 | |
e521e87e | 373 | regcache::current_regcache.push_front (new_regcache); |
ef79d9a3 | 374 | new_regcache->set_ptid (ptid); |
e2d96639 | 375 | |
e2d96639 YQ |
376 | return new_regcache; |
377 | } | |
378 | ||
379 | struct regcache * | |
380 | get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) | |
381 | { | |
ed4227b7 | 382 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 383 | |
e2d96639 | 384 | return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace); |
594f7785 UW |
385 | } |
386 | ||
c2250ad1 UW |
387 | static ptid_t current_thread_ptid; |
388 | static struct gdbarch *current_thread_arch; | |
389 | ||
390 | struct regcache * | |
391 | get_thread_regcache (ptid_t ptid) | |
392 | { | |
393 | if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid)) | |
394 | { | |
395 | current_thread_ptid = ptid; | |
396 | current_thread_arch = target_thread_architecture (ptid); | |
397 | } | |
398 | ||
399 | return get_thread_arch_regcache (ptid, current_thread_arch); | |
400 | } | |
401 | ||
402 | struct regcache * | |
403 | get_current_regcache (void) | |
594f7785 UW |
404 | { |
405 | return get_thread_regcache (inferior_ptid); | |
406 | } | |
32178cab | 407 | |
361c8ade GB |
408 | /* See common/common-regcache.h. */ |
409 | ||
410 | struct regcache * | |
411 | get_thread_regcache_for_ptid (ptid_t ptid) | |
412 | { | |
413 | return get_thread_regcache (ptid); | |
414 | } | |
32178cab | 415 | |
f4c5303c OF |
416 | /* Observer for the target_changed event. */ |
417 | ||
2c0b251b | 418 | static void |
f4c5303c OF |
419 | regcache_observer_target_changed (struct target_ops *target) |
420 | { | |
421 | registers_changed (); | |
422 | } | |
423 | ||
5231c1fd PA |
424 | /* Update global variables old ptids to hold NEW_PTID if they were |
425 | holding OLD_PTID. */ | |
e521e87e YQ |
426 | void |
427 | regcache::regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) | |
5231c1fd | 428 | { |
e521e87e | 429 | for (auto ®cache : regcache::current_regcache) |
94bb8dfe YQ |
430 | { |
431 | if (ptid_equal (regcache->ptid (), old_ptid)) | |
432 | regcache->set_ptid (new_ptid); | |
433 | } | |
5231c1fd PA |
434 | } |
435 | ||
32178cab MS |
436 | /* Low level examining and depositing of registers. |
437 | ||
438 | The caller is responsible for making sure that the inferior is | |
439 | stopped before calling the fetching routines, or it will get | |
440 | garbage. (a change from GDB version 3, in which the caller got the | |
441 | value from the last stop). */ | |
442 | ||
443 | /* REGISTERS_CHANGED () | |
444 | ||
445 | Indicate that registers may have changed, so invalidate the cache. */ | |
446 | ||
447 | void | |
e66408ed | 448 | registers_changed_ptid (ptid_t ptid) |
32178cab | 449 | { |
e521e87e | 450 | for (auto oit = regcache::current_regcache.before_begin (), |
94bb8dfe | 451 | it = std::next (oit); |
e521e87e | 452 | it != regcache::current_regcache.end (); |
94bb8dfe | 453 | ) |
c2250ad1 | 454 | { |
94bb8dfe | 455 | if (ptid_match ((*it)->ptid (), ptid)) |
e66408ed | 456 | { |
94bb8dfe | 457 | delete *it; |
e521e87e | 458 | it = regcache::current_regcache.erase_after (oit); |
e66408ed | 459 | } |
94bb8dfe YQ |
460 | else |
461 | oit = it++; | |
c2250ad1 | 462 | } |
32178cab | 463 | |
c34fd852 | 464 | if (ptid_match (current_thread_ptid, ptid)) |
041274d8 PA |
465 | { |
466 | current_thread_ptid = null_ptid; | |
467 | current_thread_arch = NULL; | |
468 | } | |
32178cab | 469 | |
c34fd852 | 470 | if (ptid_match (inferior_ptid, ptid)) |
041274d8 PA |
471 | { |
472 | /* We just deleted the regcache of the current thread. Need to | |
473 | forget about any frames we have cached, too. */ | |
474 | reinit_frame_cache (); | |
475 | } | |
476 | } | |
c2250ad1 | 477 | |
041274d8 PA |
478 | void |
479 | registers_changed (void) | |
480 | { | |
481 | registers_changed_ptid (minus_one_ptid); | |
a5d9d57d | 482 | |
32178cab MS |
483 | /* Force cleanup of any alloca areas if using C alloca instead of |
484 | a builtin alloca. This particular call is used to clean up | |
485 | areas allocated by low level target code which may build up | |
486 | during lengthy interactions between gdb and the target before | |
487 | gdb gives control to the user (ie watchpoints). */ | |
488 | alloca (0); | |
32178cab MS |
489 | } |
490 | ||
ef79d9a3 YQ |
491 | void |
492 | regcache::raw_update (int regnum) | |
493 | { | |
4e888c28 | 494 | assert_regnum (regnum); |
8e368124 | 495 | |
3fadccb3 AC |
496 | /* Make certain that the register cache is up-to-date with respect |
497 | to the current thread. This switching shouldn't be necessary | |
498 | only there is still only one target side register cache. Sigh! | |
499 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 500 | |
796bb026 | 501 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 502 | { |
ef79d9a3 | 503 | target_fetch_registers (this, regnum); |
788c8b10 PA |
504 | |
505 | /* A number of targets can't access the whole set of raw | |
506 | registers (because the debug API provides no means to get at | |
507 | them). */ | |
ef79d9a3 YQ |
508 | if (m_register_status[regnum] == REG_UNKNOWN) |
509 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 510 | } |
8e368124 AH |
511 | } |
512 | ||
ef79d9a3 | 513 | enum register_status |
849d0ba8 | 514 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
515 | { |
516 | gdb_assert (buf != NULL); | |
ef79d9a3 | 517 | raw_update (regnum); |
05d1431c | 518 | |
ef79d9a3 YQ |
519 | if (m_register_status[regnum] != REG_VALID) |
520 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 521 | else |
ef79d9a3 YQ |
522 | memcpy (buf, register_buffer (regnum), |
523 | m_descr->sizeof_register[regnum]); | |
05d1431c | 524 | |
ef79d9a3 | 525 | return (enum register_status) m_register_status[regnum]; |
61a0eb5b AC |
526 | } |
527 | ||
05d1431c | 528 | enum register_status |
28fc6740 | 529 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
530 | { |
531 | gdb_assert (regcache != NULL); | |
6f98355c | 532 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
533 | } |
534 | ||
6f98355c | 535 | template<typename T, typename> |
ef79d9a3 | 536 | enum register_status |
849d0ba8 | 537 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 538 | { |
2d522557 | 539 | gdb_byte *buf; |
05d1431c | 540 | enum register_status status; |
123f5f96 | 541 | |
4e888c28 | 542 | assert_regnum (regnum); |
ef79d9a3 YQ |
543 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
544 | status = raw_read (regnum, buf); | |
05d1431c | 545 | if (status == REG_VALID) |
6f98355c YQ |
546 | *val = extract_integer<T> (buf, |
547 | m_descr->sizeof_register[regnum], | |
548 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
549 | else |
550 | *val = 0; | |
551 | return status; | |
28fc6740 AC |
552 | } |
553 | ||
05d1431c | 554 | enum register_status |
28fc6740 AC |
555 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
556 | ULONGEST *val) | |
ef79d9a3 YQ |
557 | { |
558 | gdb_assert (regcache != NULL); | |
6f98355c | 559 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
560 | } |
561 | ||
c00dcbe9 MK |
562 | void |
563 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
564 | { |
565 | gdb_assert (regcache != NULL); | |
6f98355c | 566 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
567 | } |
568 | ||
6f98355c | 569 | template<typename T, typename> |
ef79d9a3 | 570 | void |
6f98355c | 571 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 572 | { |
7c543f7b | 573 | gdb_byte *buf; |
123f5f96 | 574 | |
4e888c28 | 575 | assert_regnum (regnum); |
ef79d9a3 | 576 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
577 | store_integer (buf, m_descr->sizeof_register[regnum], |
578 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 579 | raw_write (regnum, buf); |
c00dcbe9 MK |
580 | } |
581 | ||
582 | void | |
583 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
584 | ULONGEST val) | |
ef79d9a3 YQ |
585 | { |
586 | gdb_assert (regcache != NULL); | |
6f98355c | 587 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
588 | } |
589 | ||
9fd15b2e YQ |
590 | LONGEST |
591 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
592 | { | |
593 | LONGEST value; | |
594 | enum register_status status; | |
595 | ||
596 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
597 | if (status == REG_UNAVAILABLE) | |
598 | throw_error (NOT_AVAILABLE_ERROR, | |
599 | _("Register %d is not available"), regnum); | |
600 | return value; | |
601 | } | |
602 | ||
05d1431c | 603 | enum register_status |
2d522557 | 604 | regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
ef79d9a3 YQ |
605 | { |
606 | return regcache->cooked_read (regnum, buf); | |
607 | } | |
608 | ||
609 | enum register_status | |
849d0ba8 | 610 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 611 | { |
d138e37a | 612 | gdb_assert (regnum >= 0); |
ef79d9a3 | 613 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 614 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 615 | return raw_read (regnum, buf); |
849d0ba8 | 616 | else if (m_has_pseudo |
ef79d9a3 | 617 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 618 | { |
ef79d9a3 YQ |
619 | if (m_register_status[regnum] == REG_VALID) |
620 | memcpy (buf, register_buffer (regnum), | |
621 | m_descr->sizeof_register[regnum]); | |
05d1431c | 622 | else |
ef79d9a3 | 623 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 624 | |
ef79d9a3 | 625 | return (enum register_status) m_register_status[regnum]; |
05d1431c | 626 | } |
ef79d9a3 | 627 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
628 | { |
629 | struct value *mark, *computed; | |
630 | enum register_status result = REG_VALID; | |
631 | ||
632 | mark = value_mark (); | |
633 | ||
ef79d9a3 YQ |
634 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
635 | this, regnum); | |
3543a589 TT |
636 | if (value_entirely_available (computed)) |
637 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 638 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
639 | else |
640 | { | |
ef79d9a3 | 641 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
642 | result = REG_UNAVAILABLE; |
643 | } | |
644 | ||
645 | value_free_to_mark (mark); | |
646 | ||
647 | return result; | |
648 | } | |
d138e37a | 649 | else |
ef79d9a3 | 650 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 651 | regnum, buf); |
61a0eb5b AC |
652 | } |
653 | ||
3543a589 TT |
654 | struct value * |
655 | regcache_cooked_read_value (struct regcache *regcache, int regnum) | |
ef79d9a3 YQ |
656 | { |
657 | return regcache->cooked_read_value (regnum); | |
658 | } | |
659 | ||
660 | struct value * | |
849d0ba8 | 661 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
662 | { |
663 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 664 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 665 | |
d999647b | 666 | if (regnum < num_raw_registers () |
849d0ba8 | 667 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 668 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
669 | { |
670 | struct value *result; | |
671 | ||
ef79d9a3 | 672 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
673 | VALUE_LVAL (result) = lval_register; |
674 | VALUE_REGNUM (result) = regnum; | |
675 | ||
676 | /* It is more efficient in general to do this delegation in this | |
677 | direction than in the other one, even though the value-based | |
678 | API is preferred. */ | |
ef79d9a3 YQ |
679 | if (cooked_read (regnum, |
680 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
681 | mark_value_bytes_unavailable (result, 0, |
682 | TYPE_LENGTH (value_type (result))); | |
683 | ||
684 | return result; | |
685 | } | |
686 | else | |
ef79d9a3 YQ |
687 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
688 | this, regnum); | |
3543a589 TT |
689 | } |
690 | ||
05d1431c | 691 | enum register_status |
a378f419 AC |
692 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
693 | LONGEST *val) | |
ef79d9a3 YQ |
694 | { |
695 | gdb_assert (regcache != NULL); | |
6f98355c | 696 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
697 | } |
698 | ||
6f98355c | 699 | template<typename T, typename> |
ef79d9a3 | 700 | enum register_status |
849d0ba8 | 701 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 702 | { |
05d1431c | 703 | enum register_status status; |
2d522557 | 704 | gdb_byte *buf; |
123f5f96 | 705 | |
ef79d9a3 YQ |
706 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
707 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
708 | status = cooked_read (regnum, buf); | |
05d1431c | 709 | if (status == REG_VALID) |
6f98355c YQ |
710 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
711 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
712 | else |
713 | *val = 0; | |
714 | return status; | |
a378f419 AC |
715 | } |
716 | ||
05d1431c | 717 | enum register_status |
a378f419 AC |
718 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
719 | ULONGEST *val) | |
ef79d9a3 YQ |
720 | { |
721 | gdb_assert (regcache != NULL); | |
6f98355c | 722 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
723 | } |
724 | ||
a66a9c23 AC |
725 | void |
726 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
727 | LONGEST val) | |
ef79d9a3 YQ |
728 | { |
729 | gdb_assert (regcache != NULL); | |
6f98355c | 730 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
731 | } |
732 | ||
6f98355c | 733 | template<typename T, typename> |
ef79d9a3 | 734 | void |
6f98355c | 735 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 736 | { |
7c543f7b | 737 | gdb_byte *buf; |
123f5f96 | 738 | |
ef79d9a3 YQ |
739 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
740 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
741 | store_integer (buf, m_descr->sizeof_register[regnum], |
742 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 743 | cooked_write (regnum, buf); |
a66a9c23 AC |
744 | } |
745 | ||
746 | void | |
747 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
748 | ULONGEST val) | |
ef79d9a3 YQ |
749 | { |
750 | gdb_assert (regcache != NULL); | |
6f98355c | 751 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
752 | } |
753 | ||
ef79d9a3 YQ |
754 | void |
755 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 756 | { |
594f7785 | 757 | |
ef79d9a3 | 758 | gdb_assert (buf != NULL); |
4e888c28 | 759 | assert_regnum (regnum); |
3fadccb3 | 760 | |
3fadccb3 AC |
761 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
762 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 763 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
764 | return; |
765 | ||
3fadccb3 | 766 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 767 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
768 | if (get_register_status (regnum) == REG_VALID |
769 | && (memcmp (register_buffer (regnum), buf, | |
770 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
771 | return; |
772 | ||
ef79d9a3 | 773 | target_prepare_to_store (this); |
c8ec2f33 | 774 | raw_supply (regnum, buf); |
b94ade42 | 775 | |
b292235f TT |
776 | /* Invalidate the register after it is written, in case of a |
777 | failure. */ | |
778 | regcache_invalidator invalidator (this, regnum); | |
b94ade42 | 779 | |
ef79d9a3 | 780 | target_store_registers (this, regnum); |
594f7785 | 781 | |
b292235f TT |
782 | /* The target did not throw an error so we can discard invalidating |
783 | the register. */ | |
784 | invalidator.release (); | |
61a0eb5b AC |
785 | } |
786 | ||
68365089 | 787 | void |
2d522557 AC |
788 | regcache_cooked_write (struct regcache *regcache, int regnum, |
789 | const gdb_byte *buf) | |
ef79d9a3 YQ |
790 | { |
791 | regcache->cooked_write (regnum, buf); | |
792 | } | |
793 | ||
794 | void | |
795 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 796 | { |
d138e37a | 797 | gdb_assert (regnum >= 0); |
ef79d9a3 | 798 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 799 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 800 | raw_write (regnum, buf); |
d138e37a | 801 | else |
ef79d9a3 | 802 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 803 | regnum, buf); |
61a0eb5b AC |
804 | } |
805 | ||
06c0b04e AC |
806 | /* Perform a partial register transfer using a read, modify, write |
807 | operation. */ | |
808 | ||
ef79d9a3 | 809 | enum register_status |
849d0ba8 YQ |
810 | readable_regcache::read_part (int regnum, int offset, int len, void *in, |
811 | bool is_raw) | |
812 | { | |
813 | struct gdbarch *gdbarch = arch (); | |
814 | gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); | |
815 | ||
816 | gdb_assert (in != NULL); | |
817 | gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); | |
818 | gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); | |
819 | /* Something to do? */ | |
820 | if (offset + len == 0) | |
821 | return REG_VALID; | |
822 | /* Read (when needed) ... */ | |
823 | enum register_status status; | |
824 | ||
825 | if (is_raw) | |
826 | status = raw_read (regnum, reg); | |
827 | else | |
828 | status = cooked_read (regnum, reg); | |
829 | if (status != REG_VALID) | |
830 | return status; | |
831 | ||
832 | /* ... modify ... */ | |
833 | memcpy (in, reg + offset, len); | |
834 | ||
835 | return REG_VALID; | |
836 | } | |
837 | ||
838 | enum register_status | |
839 | regcache::write_part (int regnum, int offset, int len, | |
d3037ba6 | 840 | const void *out, bool is_raw) |
ef79d9a3 YQ |
841 | { |
842 | struct gdbarch *gdbarch = arch (); | |
9890e433 | 843 | gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); |
123f5f96 | 844 | |
849d0ba8 | 845 | gdb_assert (out != NULL); |
ef79d9a3 YQ |
846 | gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); |
847 | gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); | |
06c0b04e AC |
848 | /* Something to do? */ |
849 | if (offset + len == 0) | |
05d1431c | 850 | return REG_VALID; |
0df8b418 | 851 | /* Read (when needed) ... */ |
849d0ba8 | 852 | if (offset > 0 |
ef79d9a3 | 853 | || offset + len < m_descr->sizeof_register[regnum]) |
06c0b04e | 854 | { |
05d1431c PA |
855 | enum register_status status; |
856 | ||
d3037ba6 YQ |
857 | if (is_raw) |
858 | status = raw_read (regnum, reg); | |
859 | else | |
860 | status = cooked_read (regnum, reg); | |
05d1431c PA |
861 | if (status != REG_VALID) |
862 | return status; | |
06c0b04e | 863 | } |
849d0ba8 YQ |
864 | |
865 | memcpy (reg + offset, out, len); | |
06c0b04e | 866 | /* ... write (when needed). */ |
849d0ba8 YQ |
867 | if (is_raw) |
868 | raw_write (regnum, reg); | |
869 | else | |
870 | cooked_write (regnum, reg); | |
05d1431c PA |
871 | |
872 | return REG_VALID; | |
06c0b04e AC |
873 | } |
874 | ||
05d1431c | 875 | enum register_status |
06c0b04e | 876 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
2d522557 | 877 | int offset, int len, gdb_byte *buf) |
06c0b04e | 878 | { |
ef79d9a3 YQ |
879 | return regcache->raw_read_part (regnum, offset, len, buf); |
880 | } | |
123f5f96 | 881 | |
ef79d9a3 | 882 | enum register_status |
849d0ba8 | 883 | readable_regcache::raw_read_part (int regnum, int offset, int len, gdb_byte *buf) |
ef79d9a3 | 884 | { |
4e888c28 | 885 | assert_regnum (regnum); |
849d0ba8 | 886 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
887 | } |
888 | ||
889 | void | |
890 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 891 | int offset, int len, const gdb_byte *buf) |
06c0b04e | 892 | { |
ef79d9a3 YQ |
893 | regcache->raw_write_part (regnum, offset, len, buf); |
894 | } | |
123f5f96 | 895 | |
ef79d9a3 YQ |
896 | void |
897 | regcache::raw_write_part (int regnum, int offset, int len, | |
898 | const gdb_byte *buf) | |
899 | { | |
4e888c28 | 900 | assert_regnum (regnum); |
849d0ba8 | 901 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
902 | } |
903 | ||
05d1431c | 904 | enum register_status |
06c0b04e | 905 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
2d522557 | 906 | int offset, int len, gdb_byte *buf) |
06c0b04e | 907 | { |
ef79d9a3 YQ |
908 | return regcache->cooked_read_part (regnum, offset, len, buf); |
909 | } | |
123f5f96 | 910 | |
ef79d9a3 YQ |
911 | |
912 | enum register_status | |
849d0ba8 YQ |
913 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
914 | gdb_byte *buf) | |
ef79d9a3 YQ |
915 | { |
916 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 917 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
918 | } |
919 | ||
920 | void | |
921 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 922 | int offset, int len, const gdb_byte *buf) |
06c0b04e | 923 | { |
ef79d9a3 YQ |
924 | regcache->cooked_write_part (regnum, offset, len, buf); |
925 | } | |
123f5f96 | 926 | |
ef79d9a3 YQ |
927 | void |
928 | regcache::cooked_write_part (int regnum, int offset, int len, | |
929 | const gdb_byte *buf) | |
930 | { | |
931 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 932 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 933 | } |
32178cab | 934 | |
a16d75cc | 935 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
9a661b68 MK |
936 | |
937 | void | |
6618125d | 938 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
ef79d9a3 YQ |
939 | { |
940 | gdb_assert (regcache != NULL); | |
941 | regcache->raw_supply (regnum, buf); | |
942 | } | |
943 | ||
944 | void | |
c8ec2f33 | 945 | detached_regcache::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
946 | { |
947 | void *regbuf; | |
948 | size_t size; | |
949 | ||
4e888c28 | 950 | assert_regnum (regnum); |
9a661b68 | 951 | |
ef79d9a3 YQ |
952 | regbuf = register_buffer (regnum); |
953 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
954 | |
955 | if (buf) | |
ee99023e PA |
956 | { |
957 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 958 | m_register_status[regnum] = REG_VALID; |
ee99023e | 959 | } |
9a661b68 | 960 | else |
ee99023e PA |
961 | { |
962 | /* This memset not strictly necessary, but better than garbage | |
963 | in case the register value manages to escape somewhere (due | |
964 | to a bug, no less). */ | |
965 | memset (regbuf, 0, size); | |
ef79d9a3 | 966 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 967 | } |
9a661b68 MK |
968 | } |
969 | ||
b057297a AH |
970 | /* Supply register REGNUM to REGCACHE. Value to supply is an integer stored at |
971 | address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. If | |
972 | the register size is greater than ADDR_LEN, then the integer will be sign or | |
973 | zero extended. If the register size is smaller than the integer, then the | |
974 | most significant bytes of the integer will be truncated. */ | |
975 | ||
976 | void | |
796bb026 YQ |
977 | detached_regcache::raw_supply_integer (int regnum, const gdb_byte *addr, |
978 | int addr_len, bool is_signed) | |
b057297a AH |
979 | { |
980 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
981 | gdb_byte *regbuf; | |
982 | size_t regsize; | |
983 | ||
4e888c28 | 984 | assert_regnum (regnum); |
b057297a AH |
985 | |
986 | regbuf = register_buffer (regnum); | |
987 | regsize = m_descr->sizeof_register[regnum]; | |
988 | ||
989 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
990 | byte_order); | |
991 | m_register_status[regnum] = REG_VALID; | |
992 | } | |
993 | ||
f81fdd35 AH |
994 | /* Supply register REGNUM with zeroed value to REGCACHE. This is not the same |
995 | as calling raw_supply with NULL (which will set the state to | |
996 | unavailable). */ | |
997 | ||
998 | void | |
796bb026 | 999 | detached_regcache::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1000 | { |
1001 | void *regbuf; | |
1002 | size_t size; | |
1003 | ||
4e888c28 | 1004 | assert_regnum (regnum); |
f81fdd35 AH |
1005 | |
1006 | regbuf = register_buffer (regnum); | |
1007 | size = m_descr->sizeof_register[regnum]; | |
1008 | ||
1009 | memset (regbuf, 0, size); | |
1010 | m_register_status[regnum] = REG_VALID; | |
1011 | } | |
1012 | ||
9a661b68 MK |
1013 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
1014 | ||
1015 | void | |
6618125d | 1016 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
ef79d9a3 YQ |
1017 | { |
1018 | gdb_assert (regcache != NULL && buf != NULL); | |
1019 | regcache->raw_collect (regnum, buf); | |
1020 | } | |
1021 | ||
1022 | void | |
1023 | regcache::raw_collect (int regnum, void *buf) const | |
9a661b68 MK |
1024 | { |
1025 | const void *regbuf; | |
1026 | size_t size; | |
1027 | ||
ef79d9a3 | 1028 | gdb_assert (buf != NULL); |
4e888c28 | 1029 | assert_regnum (regnum); |
9a661b68 | 1030 | |
ef79d9a3 YQ |
1031 | regbuf = register_buffer (regnum); |
1032 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1033 | memcpy (buf, regbuf, size); |
1034 | } | |
1035 | ||
0b309272 AA |
1036 | /* Transfer a single or all registers belonging to a certain register |
1037 | set to or from a buffer. This is the main worker function for | |
1038 | regcache_supply_regset and regcache_collect_regset. */ | |
1039 | ||
b057297a AH |
1040 | /* Collect register REGNUM from REGCACHE. Store collected value as an integer |
1041 | at address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. | |
1042 | If ADDR_LEN is greater than the register size, then the integer will be sign | |
1043 | or zero extended. If ADDR_LEN is smaller than the register size, then the | |
1044 | most significant bytes of the integer will be truncated. */ | |
1045 | ||
1046 | void | |
1047 | regcache::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, | |
1048 | bool is_signed) const | |
1049 | { | |
1050 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1051 | const gdb_byte *regbuf; | |
1052 | size_t regsize; | |
1053 | ||
4e888c28 | 1054 | assert_regnum (regnum); |
b057297a AH |
1055 | |
1056 | regbuf = register_buffer (regnum); | |
1057 | regsize = m_descr->sizeof_register[regnum]; | |
1058 | ||
1059 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
1060 | byte_order); | |
1061 | } | |
1062 | ||
ef79d9a3 YQ |
1063 | void |
1064 | regcache::transfer_regset (const struct regset *regset, | |
1065 | struct regcache *out_regcache, | |
1066 | int regnum, const void *in_buf, | |
1067 | void *out_buf, size_t size) const | |
0b309272 AA |
1068 | { |
1069 | const struct regcache_map_entry *map; | |
1070 | int offs = 0, count; | |
1071 | ||
19ba03f4 SM |
1072 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1073 | (count = map->count) != 0; | |
1074 | map++) | |
0b309272 AA |
1075 | { |
1076 | int regno = map->regno; | |
1077 | int slot_size = map->size; | |
1078 | ||
1079 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1080 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1081 | |
1082 | if (regno == REGCACHE_MAP_SKIP | |
1083 | || (regnum != -1 | |
1084 | && (regnum < regno || regnum >= regno + count))) | |
1085 | offs += count * slot_size; | |
1086 | ||
1087 | else if (regnum == -1) | |
1088 | for (; count--; regno++, offs += slot_size) | |
1089 | { | |
1090 | if (offs + slot_size > size) | |
1091 | break; | |
1092 | ||
1093 | if (out_buf) | |
ef79d9a3 | 1094 | raw_collect (regno, (gdb_byte *) out_buf + offs); |
0b309272 | 1095 | else |
ef79d9a3 YQ |
1096 | out_regcache->raw_supply (regno, in_buf |
1097 | ? (const gdb_byte *) in_buf + offs | |
1098 | : NULL); | |
0b309272 AA |
1099 | } |
1100 | else | |
1101 | { | |
1102 | /* Transfer a single register and return. */ | |
1103 | offs += (regnum - regno) * slot_size; | |
1104 | if (offs + slot_size > size) | |
1105 | return; | |
1106 | ||
1107 | if (out_buf) | |
ef79d9a3 | 1108 | raw_collect (regnum, (gdb_byte *) out_buf + offs); |
0b309272 | 1109 | else |
ef79d9a3 YQ |
1110 | out_regcache->raw_supply (regnum, in_buf |
1111 | ? (const gdb_byte *) in_buf + offs | |
1112 | : NULL); | |
0b309272 AA |
1113 | return; |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1119 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1120 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1121 | ||
1122 | void | |
1123 | regcache_supply_regset (const struct regset *regset, | |
1124 | struct regcache *regcache, | |
1125 | int regnum, const void *buf, size_t size) | |
1126 | { | |
ef79d9a3 YQ |
1127 | regcache->supply_regset (regset, regnum, buf, size); |
1128 | } | |
1129 | ||
1130 | void | |
1131 | regcache::supply_regset (const struct regset *regset, | |
1132 | int regnum, const void *buf, size_t size) | |
1133 | { | |
1134 | transfer_regset (regset, this, regnum, buf, NULL, size); | |
0b309272 AA |
1135 | } |
1136 | ||
1137 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1138 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1139 | REGSET. */ | |
1140 | ||
1141 | void | |
1142 | regcache_collect_regset (const struct regset *regset, | |
1143 | const struct regcache *regcache, | |
1144 | int regnum, void *buf, size_t size) | |
1145 | { | |
ef79d9a3 YQ |
1146 | regcache->collect_regset (regset, regnum, buf, size); |
1147 | } | |
1148 | ||
1149 | void | |
1150 | regcache::collect_regset (const struct regset *regset, | |
1151 | int regnum, void *buf, size_t size) const | |
1152 | { | |
1153 | transfer_regset (regset, NULL, regnum, NULL, buf, size); | |
0b309272 AA |
1154 | } |
1155 | ||
193cb69f | 1156 | |
515630c5 | 1157 | /* Special handling for register PC. */ |
32178cab MS |
1158 | |
1159 | CORE_ADDR | |
515630c5 | 1160 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1161 | { |
ac7936df | 1162 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1163 | |
32178cab MS |
1164 | CORE_ADDR pc_val; |
1165 | ||
61a1198a UW |
1166 | if (gdbarch_read_pc_p (gdbarch)) |
1167 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1168 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1169 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1170 | { |
61a1198a | 1171 | ULONGEST raw_val; |
123f5f96 | 1172 | |
05d1431c PA |
1173 | if (regcache_cooked_read_unsigned (regcache, |
1174 | gdbarch_pc_regnum (gdbarch), | |
1175 | &raw_val) == REG_UNAVAILABLE) | |
1176 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1177 | ||
214e098a | 1178 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1179 | } |
1180 | else | |
515630c5 UW |
1181 | internal_error (__FILE__, __LINE__, |
1182 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1183 | return pc_val; |
1184 | } | |
1185 | ||
32178cab | 1186 | void |
515630c5 | 1187 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1188 | { |
ac7936df | 1189 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1190 | |
61a1198a UW |
1191 | if (gdbarch_write_pc_p (gdbarch)) |
1192 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1193 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1194 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1195 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1196 | else |
1197 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1198 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1199 | |
1200 | /* Writing the PC (for instance, from "load") invalidates the | |
1201 | current frame. */ | |
1202 | reinit_frame_cache (); | |
32178cab MS |
1203 | } |
1204 | ||
d999647b | 1205 | int |
31716595 | 1206 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1207 | { |
1208 | return gdbarch_num_regs (arch ()); | |
1209 | } | |
1210 | ||
ed771251 | 1211 | void |
ef79d9a3 | 1212 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1213 | { |
ef79d9a3 | 1214 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1215 | |
1216 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1217 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1218 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1219 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1220 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1221 | gdbarch_register_name (gdbarch, regno)); | |
1222 | else | |
1223 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1224 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1225 | { | |
1226 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1227 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1228 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1229 | |
1230 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1231 | for (int i = 0; i < size; i++) | |
1232 | { | |
1233 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1234 | } | |
1235 | if (size <= sizeof (LONGEST)) | |
1236 | { | |
1237 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1238 | ||
1239 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1240 | core_addr_to_string_nz (val), plongest (val)); | |
1241 | } | |
1242 | } | |
1243 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1244 | } | |
32178cab | 1245 | |
705152c5 | 1246 | static void |
0b39b52e | 1247 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1248 | { |
1249 | /* Force-flush the register cache. */ | |
1250 | registers_changed (); | |
1251 | if (from_tty) | |
a3f17187 | 1252 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1253 | } |
1254 | ||
4c74fe6b YQ |
1255 | void |
1256 | register_dump::dump (ui_file *file) | |
af030b9a | 1257 | { |
4c74fe6b YQ |
1258 | auto descr = regcache_descr (m_gdbarch); |
1259 | int regnum; | |
1260 | int footnote_nr = 0; | |
1261 | int footnote_register_offset = 0; | |
1262 | int footnote_register_type_name_null = 0; | |
1263 | long register_offset = 0; | |
af030b9a | 1264 | |
4c74fe6b YQ |
1265 | gdb_assert (descr->nr_cooked_registers |
1266 | == (gdbarch_num_regs (m_gdbarch) | |
1267 | + gdbarch_num_pseudo_regs (m_gdbarch))); | |
af030b9a | 1268 | |
4c74fe6b YQ |
1269 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1270 | { | |
1271 | /* Name. */ | |
1272 | if (regnum < 0) | |
1273 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1274 | else | |
1275 | { | |
1276 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1277 | |
4c74fe6b YQ |
1278 | if (p == NULL) |
1279 | p = ""; | |
1280 | else if (p[0] == '\0') | |
1281 | p = "''"; | |
1282 | fprintf_unfiltered (file, " %-10s", p); | |
1283 | } | |
af030b9a | 1284 | |
4c74fe6b YQ |
1285 | /* Number. */ |
1286 | if (regnum < 0) | |
1287 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1288 | else | |
1289 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1290 | |
4c74fe6b YQ |
1291 | /* Relative number. */ |
1292 | if (regnum < 0) | |
1293 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1294 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1295 | fprintf_unfiltered (file, " %4d", regnum); | |
1296 | else | |
1297 | fprintf_unfiltered (file, " %4d", | |
1298 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1299 | |
4c74fe6b YQ |
1300 | /* Offset. */ |
1301 | if (regnum < 0) | |
1302 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1303 | else | |
af030b9a | 1304 | { |
4c74fe6b YQ |
1305 | fprintf_unfiltered (file, " %6ld", |
1306 | descr->register_offset[regnum]); | |
1307 | if (register_offset != descr->register_offset[regnum] | |
1308 | || (regnum > 0 | |
1309 | && (descr->register_offset[regnum] | |
1310 | != (descr->register_offset[regnum - 1] | |
1311 | + descr->sizeof_register[regnum - 1]))) | |
1312 | ) | |
af030b9a | 1313 | { |
4c74fe6b YQ |
1314 | if (!footnote_register_offset) |
1315 | footnote_register_offset = ++footnote_nr; | |
1316 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1317 | } |
4c74fe6b YQ |
1318 | else |
1319 | fprintf_unfiltered (file, " "); | |
1320 | register_offset = (descr->register_offset[regnum] | |
1321 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1322 | } |
1323 | ||
4c74fe6b YQ |
1324 | /* Size. */ |
1325 | if (regnum < 0) | |
1326 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1327 | else | |
1328 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1329 | |
4c74fe6b | 1330 | /* Type. */ |
f3384e66 | 1331 | { |
4c74fe6b YQ |
1332 | const char *t; |
1333 | std::string name_holder; | |
b59ff9d5 | 1334 | |
4c74fe6b YQ |
1335 | if (regnum < 0) |
1336 | t = "Type"; | |
215c69dc YQ |
1337 | else |
1338 | { | |
4c74fe6b | 1339 | static const char blt[] = "builtin_type"; |
123f5f96 | 1340 | |
4c74fe6b YQ |
1341 | t = TYPE_NAME (register_type (m_gdbarch, regnum)); |
1342 | if (t == NULL) | |
f3384e66 | 1343 | { |
4c74fe6b YQ |
1344 | if (!footnote_register_type_name_null) |
1345 | footnote_register_type_name_null = ++footnote_nr; | |
1346 | name_holder = string_printf ("*%d", | |
1347 | footnote_register_type_name_null); | |
1348 | t = name_holder.c_str (); | |
f3384e66 | 1349 | } |
4c74fe6b YQ |
1350 | /* Chop a leading builtin_type. */ |
1351 | if (startswith (t, blt)) | |
1352 | t += strlen (blt); | |
f3384e66 | 1353 | } |
4c74fe6b | 1354 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1355 | } |
f3384e66 | 1356 | |
4c74fe6b YQ |
1357 | /* Leading space always present. */ |
1358 | fprintf_unfiltered (file, " "); | |
af030b9a | 1359 | |
4c74fe6b | 1360 | dump_reg (file, regnum); |
ed4227b7 | 1361 | |
4c74fe6b | 1362 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1363 | } |
1364 | ||
4c74fe6b YQ |
1365 | if (footnote_register_offset) |
1366 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1367 | footnote_register_offset); | |
1368 | if (footnote_register_type_name_null) | |
1369 | fprintf_unfiltered (file, | |
1370 | "*%d: Register type's name NULL.\n", | |
1371 | footnote_register_type_name_null); | |
c21236dc PA |
1372 | } |
1373 | ||
8248946c YQ |
1374 | #if GDB_SELF_TEST |
1375 | #include "selftest.h" | |
1b30aaa5 YQ |
1376 | #include "selftest-arch.h" |
1377 | #include "gdbthread.h" | |
ec7a5fcb | 1378 | #include "target-float.h" |
8248946c YQ |
1379 | |
1380 | namespace selftests { | |
1381 | ||
e521e87e | 1382 | class regcache_access : public regcache |
8248946c | 1383 | { |
e521e87e YQ |
1384 | public: |
1385 | ||
1386 | /* Return the number of elements in current_regcache. */ | |
1387 | ||
1388 | static size_t | |
1389 | current_regcache_size () | |
1390 | { | |
1391 | return std::distance (regcache::current_regcache.begin (), | |
1392 | regcache::current_regcache.end ()); | |
1393 | } | |
1394 | }; | |
8248946c YQ |
1395 | |
1396 | static void | |
1397 | current_regcache_test (void) | |
1398 | { | |
1399 | /* It is empty at the start. */ | |
e521e87e | 1400 | SELF_CHECK (regcache_access::current_regcache_size () == 0); |
8248946c YQ |
1401 | |
1402 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1403 | ||
1404 | /* Get regcache from ptid1, a new regcache is added to | |
1405 | current_regcache. */ | |
1406 | regcache *regcache = get_thread_arch_aspace_regcache (ptid1, | |
1407 | target_gdbarch (), | |
1408 | NULL); | |
1409 | ||
1410 | SELF_CHECK (regcache != NULL); | |
1411 | SELF_CHECK (regcache->ptid () == ptid1); | |
e521e87e | 1412 | SELF_CHECK (regcache_access::current_regcache_size () == 1); |
8248946c YQ |
1413 | |
1414 | /* Get regcache from ptid2, a new regcache is added to | |
1415 | current_regcache. */ | |
1416 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1417 | target_gdbarch (), | |
1418 | NULL); | |
1419 | SELF_CHECK (regcache != NULL); | |
1420 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1421 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1422 | |
1423 | /* Get regcache from ptid3, a new regcache is added to | |
1424 | current_regcache. */ | |
1425 | regcache = get_thread_arch_aspace_regcache (ptid3, | |
1426 | target_gdbarch (), | |
1427 | NULL); | |
1428 | SELF_CHECK (regcache != NULL); | |
1429 | SELF_CHECK (regcache->ptid () == ptid3); | |
e521e87e | 1430 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1431 | |
1432 | /* Get regcache from ptid2 again, nothing is added to | |
1433 | current_regcache. */ | |
1434 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1435 | target_gdbarch (), | |
1436 | NULL); | |
1437 | SELF_CHECK (regcache != NULL); | |
1438 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1439 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1440 | |
1441 | /* Mark ptid2 is changed, so regcache of ptid2 should be removed from | |
1442 | current_regcache. */ | |
1443 | registers_changed_ptid (ptid2); | |
e521e87e | 1444 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1445 | } |
1446 | ||
1b30aaa5 YQ |
1447 | class target_ops_no_register : public test_target_ops |
1448 | { | |
1449 | public: | |
1450 | target_ops_no_register () | |
1451 | : test_target_ops {} | |
f6ac5f3d | 1452 | {} |
1b30aaa5 YQ |
1453 | |
1454 | void reset () | |
1455 | { | |
1456 | fetch_registers_called = 0; | |
1457 | store_registers_called = 0; | |
1458 | xfer_partial_called = 0; | |
1459 | } | |
1460 | ||
f6ac5f3d PA |
1461 | void fetch_registers (regcache *regs, int regno) override; |
1462 | void store_registers (regcache *regs, int regno) override; | |
1463 | ||
1464 | enum target_xfer_status xfer_partial (enum target_object object, | |
1465 | const char *annex, gdb_byte *readbuf, | |
1466 | const gdb_byte *writebuf, | |
1467 | ULONGEST offset, ULONGEST len, | |
1468 | ULONGEST *xfered_len) override; | |
1469 | ||
1b30aaa5 YQ |
1470 | unsigned int fetch_registers_called = 0; |
1471 | unsigned int store_registers_called = 0; | |
1472 | unsigned int xfer_partial_called = 0; | |
1473 | }; | |
1474 | ||
f6ac5f3d PA |
1475 | void |
1476 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1477 | { |
1b30aaa5 YQ |
1478 | /* Mark register available. */ |
1479 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1480 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1481 | } |
1482 | ||
f6ac5f3d PA |
1483 | void |
1484 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1485 | { |
f6ac5f3d | 1486 | this->store_registers_called++; |
1b30aaa5 YQ |
1487 | } |
1488 | ||
f6ac5f3d PA |
1489 | enum target_xfer_status |
1490 | target_ops_no_register::xfer_partial (enum target_object object, | |
1491 | const char *annex, gdb_byte *readbuf, | |
1492 | const gdb_byte *writebuf, | |
1493 | ULONGEST offset, ULONGEST len, | |
1494 | ULONGEST *xfered_len) | |
1b30aaa5 | 1495 | { |
f6ac5f3d | 1496 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1497 | |
1498 | *xfered_len = len; | |
1499 | return TARGET_XFER_OK; | |
1500 | } | |
1501 | ||
1502 | class readwrite_regcache : public regcache | |
1503 | { | |
1504 | public: | |
1505 | readwrite_regcache (struct gdbarch *gdbarch) | |
796bb026 | 1506 | : regcache (gdbarch, nullptr) |
1b30aaa5 YQ |
1507 | {} |
1508 | }; | |
1509 | ||
1510 | /* Test regcache::cooked_read gets registers from raw registers and | |
1511 | memory instead of target to_{fetch,store}_registers. */ | |
1512 | ||
1513 | static void | |
1514 | cooked_read_test (struct gdbarch *gdbarch) | |
1515 | { | |
1516 | /* Error out if debugging something, because we're going to push the | |
1517 | test target, which would pop any existing target. */ | |
f6ac5f3d | 1518 | if (target_stack->to_stratum >= process_stratum) |
1b30aaa5 YQ |
1519 | error (_("target already pushed")); |
1520 | ||
1521 | /* Create a mock environment. An inferior with a thread, with a | |
1522 | process_stratum target pushed. */ | |
1523 | ||
1524 | target_ops_no_register mock_target; | |
1525 | ptid_t mock_ptid (1, 1); | |
1526 | inferior mock_inferior (mock_ptid.pid ()); | |
1527 | address_space mock_aspace {}; | |
1528 | mock_inferior.gdbarch = gdbarch; | |
1529 | mock_inferior.aspace = &mock_aspace; | |
1530 | thread_info mock_thread (&mock_inferior, mock_ptid); | |
1531 | ||
1532 | scoped_restore restore_thread_list | |
1533 | = make_scoped_restore (&thread_list, &mock_thread); | |
1534 | ||
1535 | /* Add the mock inferior to the inferior list so that look ups by | |
1536 | target+ptid can find it. */ | |
1537 | scoped_restore restore_inferior_list | |
1538 | = make_scoped_restore (&inferior_list); | |
1539 | inferior_list = &mock_inferior; | |
1540 | ||
1541 | /* Switch to the mock inferior. */ | |
1542 | scoped_restore_current_inferior restore_current_inferior; | |
1543 | set_current_inferior (&mock_inferior); | |
1544 | ||
1545 | /* Push the process_stratum target so we can mock accessing | |
1546 | registers. */ | |
1547 | push_target (&mock_target); | |
1548 | ||
1549 | /* Pop it again on exit (return/exception). */ | |
1550 | struct on_exit | |
1551 | { | |
1552 | ~on_exit () | |
1553 | { | |
1554 | pop_all_targets_at_and_above (process_stratum); | |
1555 | } | |
1556 | } pop_targets; | |
1557 | ||
1558 | /* Switch to the mock thread. */ | |
1559 | scoped_restore restore_inferior_ptid | |
1560 | = make_scoped_restore (&inferior_ptid, mock_ptid); | |
1561 | ||
1562 | /* Test that read one raw register from regcache_no_target will go | |
1563 | to the target layer. */ | |
1564 | int regnum; | |
1565 | ||
1566 | /* Find a raw register which size isn't zero. */ | |
1567 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) | |
1568 | { | |
1569 | if (register_size (gdbarch, regnum) != 0) | |
1570 | break; | |
1571 | } | |
1572 | ||
1573 | readwrite_regcache readwrite (gdbarch); | |
1574 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1575 | ||
1576 | readwrite.raw_read (regnum, buf.data ()); | |
1577 | ||
1578 | /* raw_read calls target_fetch_registers. */ | |
1579 | SELF_CHECK (mock_target.fetch_registers_called > 0); | |
1580 | mock_target.reset (); | |
1581 | ||
1582 | /* Mark all raw registers valid, so the following raw registers | |
1583 | accesses won't go to target. */ | |
1584 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1585 | readwrite.raw_update (i); | |
1586 | ||
1587 | mock_target.reset (); | |
1588 | /* Then, read all raw and pseudo registers, and don't expect calling | |
1589 | to_{fetch,store}_registers. */ | |
1590 | for (int regnum = 0; | |
1591 | regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); | |
1592 | regnum++) | |
1593 | { | |
1594 | if (register_size (gdbarch, regnum) == 0) | |
1595 | continue; | |
1596 | ||
1597 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1598 | ||
1599 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, buf.data ())); | |
1600 | ||
dc711524 YQ |
1601 | SELF_CHECK (mock_target.fetch_registers_called == 0); |
1602 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1b30aaa5 YQ |
1603 | |
1604 | /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */ | |
1605 | if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu) | |
1606 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1607 | ||
1608 | mock_target.reset (); | |
1609 | } | |
a63f2d2f | 1610 | |
215c69dc | 1611 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1612 | |
1613 | /* GDB may go to target layer to fetch all registers and memory for | |
1614 | readonly regcache. */ | |
1615 | mock_target.reset (); | |
1616 | ||
1617 | for (int regnum = 0; | |
1618 | regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); | |
1619 | regnum++) | |
1620 | { | |
a63f2d2f YQ |
1621 | if (register_size (gdbarch, regnum) == 0) |
1622 | continue; | |
1623 | ||
1624 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1625 | enum register_status status = readonly.cooked_read (regnum, | |
1626 | buf.data ()); | |
1627 | ||
1628 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1629 | { | |
1630 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1631 | ||
1632 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1633 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1634 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1635 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1636 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1637 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 AB |
1638 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
1639 | || bfd_arch == bfd_arch_riscv) | |
a63f2d2f YQ |
1640 | { |
1641 | /* Raw registers. If raw registers are not in save_reggroup, | |
1642 | their status are unknown. */ | |
1643 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1644 | SELF_CHECK (status == REG_VALID); | |
1645 | else | |
1646 | SELF_CHECK (status == REG_UNKNOWN); | |
1647 | } | |
1648 | else | |
1649 | SELF_CHECK (status == REG_VALID); | |
1650 | } | |
1651 | else | |
1652 | { | |
1653 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1654 | SELF_CHECK (status == REG_VALID); | |
1655 | else | |
1656 | { | |
1657 | /* If pseudo registers are not in save_reggroup, some of | |
1658 | them can be computed from saved raw registers, but some | |
1659 | of them are unknown. */ | |
1660 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1661 | ||
1662 | if (bfd_arch == bfd_arch_frv | |
1663 | || bfd_arch == bfd_arch_m32c | |
1664 | || bfd_arch == bfd_arch_mep | |
1665 | || bfd_arch == bfd_arch_sh) | |
1666 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1667 | else if (bfd_arch == bfd_arch_mips | |
1668 | || bfd_arch == bfd_arch_h8300) | |
1669 | SELF_CHECK (status == REG_UNKNOWN); | |
1670 | else | |
1671 | SELF_CHECK (status == REG_VALID); | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | SELF_CHECK (mock_target.fetch_registers_called == 0); | |
1676 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1677 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1678 | ||
1679 | mock_target.reset (); | |
1680 | } | |
1b30aaa5 YQ |
1681 | } |
1682 | ||
ec7a5fcb YQ |
1683 | /* Test regcache::cooked_write by writing some expected contents to |
1684 | registers, and checking that contents read from registers and the | |
1685 | expected contents are the same. */ | |
1686 | ||
1687 | static void | |
1688 | cooked_write_test (struct gdbarch *gdbarch) | |
1689 | { | |
1690 | /* Error out if debugging something, because we're going to push the | |
1691 | test target, which would pop any existing target. */ | |
f6ac5f3d | 1692 | if (target_stack->to_stratum >= process_stratum) |
ec7a5fcb YQ |
1693 | error (_("target already pushed")); |
1694 | ||
1695 | /* Create a mock environment. A process_stratum target pushed. */ | |
1696 | ||
1697 | target_ops_no_register mock_target; | |
1698 | ||
1699 | /* Push the process_stratum target so we can mock accessing | |
1700 | registers. */ | |
1701 | push_target (&mock_target); | |
1702 | ||
1703 | /* Pop it again on exit (return/exception). */ | |
1704 | struct on_exit | |
1705 | { | |
1706 | ~on_exit () | |
1707 | { | |
1708 | pop_all_targets_at_and_above (process_stratum); | |
1709 | } | |
1710 | } pop_targets; | |
1711 | ||
1712 | readwrite_regcache readwrite (gdbarch); | |
1713 | ||
1714 | const int num_regs = (gdbarch_num_regs (gdbarch) | |
1715 | + gdbarch_num_pseudo_regs (gdbarch)); | |
1716 | ||
1717 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1718 | { | |
1719 | if (register_size (gdbarch, regnum) == 0 | |
1720 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1721 | continue; | |
1722 | ||
1723 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1724 | ||
1725 | if ((bfd_arch == bfd_arch_sparc | |
1726 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1727 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1728 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1729 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1730 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1731 | || (bfd_arch == bfd_arch_spu |
1732 | /* SPU pseudo registers except SPU_SP_REGNUM are got by | |
1733 | TARGET_OBJECT_SPU. */ | |
1734 | && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130)) | |
1735 | continue; | |
1736 | ||
1737 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1738 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1739 | const auto type = register_type (gdbarch, regnum); | |
1740 | ||
1741 | if (TYPE_CODE (type) == TYPE_CODE_FLT | |
1742 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
1743 | { | |
1744 | /* Generate valid float format. */ | |
1745 | target_float_from_string (expected.data (), type, "1.25"); | |
1746 | } | |
1747 | else if (TYPE_CODE (type) == TYPE_CODE_INT | |
1748 | || TYPE_CODE (type) == TYPE_CODE_ARRAY | |
1749 | || TYPE_CODE (type) == TYPE_CODE_PTR | |
1750 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
1751 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
1752 | { | |
1753 | if (bfd_arch == bfd_arch_ia64 | |
1754 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1755 | && (bfd_arch == bfd_arch_xtensa | |
1756 | || bfd_arch == bfd_arch_bfin | |
1757 | || bfd_arch == bfd_arch_m32c | |
1758 | /* m68hc11 pseudo registers are in memory. */ | |
1759 | || bfd_arch == bfd_arch_m68hc11 | |
1760 | || bfd_arch == bfd_arch_m68hc12 | |
1761 | || bfd_arch == bfd_arch_s390)) | |
1762 | || (bfd_arch == bfd_arch_frv | |
1763 | /* FRV pseudo registers except iacc0. */ | |
1764 | && regnum > gdbarch_num_regs (gdbarch))) | |
1765 | { | |
1766 | /* Skip setting the expected values for some architecture | |
1767 | registers. */ | |
1768 | } | |
1769 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1770 | { | |
1771 | /* RL78_PC_REGNUM */ | |
1772 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1773 | expected[j] = j; | |
1774 | } | |
1775 | else | |
1776 | { | |
1777 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1778 | expected[j] = j; | |
1779 | } | |
1780 | } | |
1781 | else if (TYPE_CODE (type) == TYPE_CODE_FLAGS) | |
1782 | { | |
1783 | /* No idea how to test flags. */ | |
1784 | continue; | |
1785 | } | |
1786 | else | |
1787 | { | |
1788 | /* If we don't know how to create the expected value for the | |
1789 | this type, make it fail. */ | |
1790 | SELF_CHECK (0); | |
1791 | } | |
1792 | ||
1793 | readwrite.cooked_write (regnum, expected.data ()); | |
1794 | ||
1795 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1796 | SELF_CHECK (expected == buf); | |
1797 | } | |
1798 | } | |
1799 | ||
8248946c YQ |
1800 | } // namespace selftests |
1801 | #endif /* GDB_SELF_TEST */ | |
1802 | ||
32178cab MS |
1803 | void |
1804 | _initialize_regcache (void) | |
1805 | { | |
3e43a32a MS |
1806 | regcache_descr_handle |
1807 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1808 | |
76727919 TT |
1809 | gdb::observers::target_changed.attach (regcache_observer_target_changed); |
1810 | gdb::observers::thread_ptid_changed.attach | |
1811 | (regcache::regcache_thread_ptid_changed); | |
f4c5303c | 1812 | |
705152c5 | 1813 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1bedd215 | 1814 | _("Force gdb to flush its register cache (maintainer command)")); |
39f77062 | 1815 | |
8248946c | 1816 | #if GDB_SELF_TEST |
1526853e | 1817 | selftests::register_test ("current_regcache", selftests::current_regcache_test); |
1b30aaa5 YQ |
1818 | |
1819 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1820 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1821 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1822 | selftests::cooked_write_test); | |
8248946c | 1823 | #endif |
32178cab | 1824 | } |