Commit | Line | Data |
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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
b811d2c2 | 3 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
32178cab MS |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
32178cab MS |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
32178cab MS |
19 | |
20 | #include "defs.h" | |
32178cab | 21 | #include "inferior.h" |
00431a78 | 22 | #include "gdbthread.h" |
32178cab | 23 | #include "target.h" |
c180496d | 24 | #include "test-target.h" |
236ef034 | 25 | #include "scoped-mock-context.h" |
32178cab | 26 | #include "gdbarch.h" |
705152c5 | 27 | #include "gdbcmd.h" |
4e052eda | 28 | #include "regcache.h" |
b59ff9d5 | 29 | #include "reggroups.h" |
76727919 | 30 | #include "observable.h" |
0b309272 | 31 | #include "regset.h" |
94bb8dfe | 32 | #include <forward_list> |
32178cab MS |
33 | |
34 | /* | |
35 | * DATA STRUCTURE | |
36 | * | |
37 | * Here is the actual register cache. | |
38 | */ | |
39 | ||
3fadccb3 | 40 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 41 | Computed once when the architecture is created. */ |
3fadccb3 AC |
42 | |
43 | struct gdbarch_data *regcache_descr_handle; | |
44 | ||
45 | struct regcache_descr | |
46 | { | |
47 | /* The architecture this descriptor belongs to. */ | |
48 | struct gdbarch *gdbarch; | |
49 | ||
bb1db049 AC |
50 | /* The raw register cache. Each raw (or hard) register is supplied |
51 | by the target interface. The raw cache should not contain | |
52 | redundant information - if the PC is constructed from two | |
d2f0b918 | 53 | registers then those registers and not the PC lives in the raw |
bb1db049 | 54 | cache. */ |
3fadccb3 | 55 | long sizeof_raw_registers; |
3fadccb3 | 56 | |
d138e37a AC |
57 | /* The cooked register space. Each cooked register in the range |
58 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
59 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 60 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 61 | both raw registers and memory by the architecture methods |
02f60eae | 62 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 63 | int nr_cooked_registers; |
067df2e5 | 64 | long sizeof_cooked_registers; |
d138e37a | 65 | |
86d31898 | 66 | /* Offset and size (in 8 bit bytes), of each register in the |
d138e37a | 67 | register cache. All registers (including those in the range |
99e42fd8 PA |
68 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
69 | offset. */ | |
3fadccb3 | 70 | long *register_offset; |
3fadccb3 | 71 | long *sizeof_register; |
3fadccb3 | 72 | |
bb425013 AC |
73 | /* Cached table containing the type of each register. */ |
74 | struct type **register_type; | |
3fadccb3 AC |
75 | }; |
76 | ||
3fadccb3 AC |
77 | static void * |
78 | init_regcache_descr (struct gdbarch *gdbarch) | |
79 | { | |
80 | int i; | |
81 | struct regcache_descr *descr; | |
82 | gdb_assert (gdbarch != NULL); | |
83 | ||
bb425013 | 84 | /* Create an initial, zero filled, table. */ |
116f06ea | 85 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 86 | descr->gdbarch = gdbarch; |
3fadccb3 | 87 | |
d138e37a AC |
88 | /* Total size of the register space. The raw registers are mapped |
89 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 90 | either mapped onto raw-registers or memory. */ |
f6efe3f8 | 91 | descr->nr_cooked_registers = gdbarch_num_cooked_regs (gdbarch); |
3fadccb3 | 92 | |
bb425013 | 93 | /* Fill in a table of register types. */ |
116f06ea | 94 | descr->register_type |
3e43a32a MS |
95 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
96 | struct type *); | |
bb425013 | 97 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 98 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 99 | |
bb1db049 AC |
100 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
101 | into the register cache. */ | |
bb1db049 | 102 | |
067df2e5 | 103 | /* Lay out the register cache. |
3fadccb3 | 104 | |
78134374 | 105 | NOTE: cagney/2002-05-22: Only register_type () is used when |
bb425013 AC |
106 | constructing the register cache. It is assumed that the |
107 | register's raw size, virtual size and type length are all the | |
108 | same. */ | |
3fadccb3 AC |
109 | |
110 | { | |
111 | long offset = 0; | |
123f5f96 | 112 | |
116f06ea AC |
113 | descr->sizeof_register |
114 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
115 | descr->register_offset | |
116 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
d999647b | 117 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
99e42fd8 PA |
118 | { |
119 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); | |
120 | descr->register_offset[i] = offset; | |
121 | offset += descr->sizeof_register[i]; | |
99e42fd8 PA |
122 | } |
123 | /* Set the real size of the raw register cache buffer. */ | |
124 | descr->sizeof_raw_registers = offset; | |
125 | ||
126 | for (; i < descr->nr_cooked_registers; i++) | |
3fadccb3 | 127 | { |
bb425013 | 128 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
129 | descr->register_offset[i] = offset; |
130 | offset += descr->sizeof_register[i]; | |
3fadccb3 | 131 | } |
99e42fd8 | 132 | /* Set the real size of the readonly register cache buffer. */ |
067df2e5 | 133 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
134 | } |
135 | ||
3fadccb3 AC |
136 | return descr; |
137 | } | |
138 | ||
139 | static struct regcache_descr * | |
140 | regcache_descr (struct gdbarch *gdbarch) | |
141 | { | |
19ba03f4 SM |
142 | return (struct regcache_descr *) gdbarch_data (gdbarch, |
143 | regcache_descr_handle); | |
3fadccb3 AC |
144 | } |
145 | ||
bb425013 AC |
146 | /* Utility functions returning useful register attributes stored in |
147 | the regcache descr. */ | |
148 | ||
149 | struct type * | |
150 | register_type (struct gdbarch *gdbarch, int regnum) | |
151 | { | |
152 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
123f5f96 | 153 | |
bb425013 AC |
154 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
155 | return descr->register_type[regnum]; | |
156 | } | |
157 | ||
0ed04cce AC |
158 | /* Utility functions returning useful register attributes stored in |
159 | the regcache descr. */ | |
160 | ||
08a617da AC |
161 | int |
162 | register_size (struct gdbarch *gdbarch, int regnum) | |
163 | { | |
164 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
165 | int size; | |
123f5f96 | 166 | |
f6efe3f8 | 167 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_cooked_regs (gdbarch)); |
08a617da | 168 | size = descr->sizeof_register[regnum]; |
08a617da AC |
169 | return size; |
170 | } | |
171 | ||
268a13a5 | 172 | /* See gdbsupport/common-regcache.h. */ |
8d689ee5 YQ |
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 | ||
5b6d1e4f PA |
200 | regcache::regcache (process_stratum_target *target, gdbarch *gdbarch, |
201 | const address_space *aspace_) | |
796bb026 YQ |
202 | /* The register buffers. A read/write register cache can only hold |
203 | [0 .. gdbarch_num_regs). */ | |
5b6d1e4f | 204 | : detached_regcache (gdbarch, false), m_aspace (aspace_), m_target (target) |
31716595 | 205 | { |
ef79d9a3 YQ |
206 | m_ptid = minus_one_ptid; |
207 | } | |
4621115f | 208 | |
302abd6e SM |
209 | readonly_detached_regcache::readonly_detached_regcache (regcache &src) |
210 | : readonly_detached_regcache (src.arch (), | |
211 | [&src] (int regnum, gdb_byte *buf) | |
212 | { | |
213 | return src.cooked_read (regnum, buf); | |
214 | }) | |
daf6667d YQ |
215 | { |
216 | } | |
217 | ||
ef79d9a3 | 218 | gdbarch * |
31716595 | 219 | reg_buffer::arch () const |
ef79d9a3 YQ |
220 | { |
221 | return m_descr->gdbarch; | |
222 | } | |
3fadccb3 | 223 | |
51b1fe4e AC |
224 | /* Return a pointer to register REGNUM's buffer cache. */ |
225 | ||
ef79d9a3 | 226 | gdb_byte * |
31716595 | 227 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 228 | { |
835dcf92 | 229 | return m_registers.get () + m_descr->register_offset[regnum]; |
51b1fe4e AC |
230 | } |
231 | ||
ef79d9a3 | 232 | void |
302abd6e | 233 | reg_buffer::save (register_read_ftype cooked_read) |
ef79d9a3 YQ |
234 | { |
235 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 236 | int regnum; |
123f5f96 | 237 | |
daf6667d YQ |
238 | /* It should have pseudo registers. */ |
239 | gdb_assert (m_has_pseudo); | |
2d28509a | 240 | /* Clear the dest. */ |
835dcf92 SM |
241 | memset (m_registers.get (), 0, m_descr->sizeof_cooked_registers); |
242 | memset (m_register_status.get (), REG_UNKNOWN, m_descr->nr_cooked_registers); | |
2d28509a | 243 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
244 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
245 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 246 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 247 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
248 | { |
249 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
250 | { | |
50d6adef | 251 | gdb_byte *dst_buf = register_buffer (regnum); |
302abd6e | 252 | enum register_status status = cooked_read (regnum, dst_buf); |
123f5f96 | 253 | |
50d6adef AH |
254 | gdb_assert (status != REG_UNKNOWN); |
255 | ||
256 | if (status != REG_VALID) | |
257 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 258 | |
ef79d9a3 | 259 | m_register_status[regnum] = status; |
2d28509a AC |
260 | } |
261 | } | |
262 | } | |
263 | ||
ef79d9a3 | 264 | void |
daf6667d | 265 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 266 | { |
ef79d9a3 | 267 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 268 | int regnum; |
123f5f96 | 269 | |
fc5b8736 | 270 | gdb_assert (src != NULL); |
daf6667d | 271 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
272 | |
273 | gdb_assert (gdbarch == src->arch ()); | |
274 | ||
2d28509a | 275 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
276 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
277 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 278 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 279 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 280 | { |
5602984a | 281 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 282 | { |
ef79d9a3 YQ |
283 | if (src->m_register_status[regnum] == REG_VALID) |
284 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
285 | } |
286 | } | |
287 | } | |
288 | ||
268a13a5 | 289 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 290 | |
ef79d9a3 | 291 | enum register_status |
c8ec2f33 | 292 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 293 | { |
c8ec2f33 | 294 | assert_regnum (regnum); |
6ed7ea50 | 295 | |
aac0d564 | 296 | return m_register_status[regnum]; |
3fadccb3 AC |
297 | } |
298 | ||
ef79d9a3 | 299 | void |
9c861883 | 300 | reg_buffer::invalidate (int regnum) |
ef79d9a3 | 301 | { |
4e888c28 | 302 | assert_regnum (regnum); |
ef79d9a3 YQ |
303 | m_register_status[regnum] = REG_UNKNOWN; |
304 | } | |
9c5ea4d9 | 305 | |
4e888c28 | 306 | void |
31716595 | 307 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 308 | { |
31716595 YQ |
309 | gdb_assert (regnum >= 0); |
310 | if (m_has_pseudo) | |
311 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
312 | else | |
313 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
314 | } |
315 | ||
3fadccb3 | 316 | /* Global structure containing the current regcache. */ |
3fadccb3 | 317 | |
5ebd2499 | 318 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
319 | recording if the register values have been changed (eg. by the |
320 | user). Therefore all registers must be written back to the | |
321 | target when appropriate. */ | |
174981ae | 322 | std::forward_list<regcache *> regcache::regcaches; |
c2250ad1 UW |
323 | |
324 | struct regcache * | |
5b6d1e4f PA |
325 | get_thread_arch_aspace_regcache (process_stratum_target *target, |
326 | ptid_t ptid, struct gdbarch *gdbarch, | |
e2d96639 | 327 | struct address_space *aspace) |
c2250ad1 | 328 | { |
5b6d1e4f PA |
329 | gdb_assert (target != nullptr); |
330 | ||
174981ae | 331 | for (const auto ®cache : regcache::regcaches) |
5b6d1e4f PA |
332 | if (regcache->target () == target |
333 | && regcache->ptid () == ptid | |
334 | && regcache->arch () == gdbarch) | |
94bb8dfe | 335 | return regcache; |
594f7785 | 336 | |
5b6d1e4f | 337 | regcache *new_regcache = new regcache (target, gdbarch, aspace); |
594f7785 | 338 | |
174981ae | 339 | regcache::regcaches.push_front (new_regcache); |
ef79d9a3 | 340 | new_regcache->set_ptid (ptid); |
e2d96639 | 341 | |
e2d96639 YQ |
342 | return new_regcache; |
343 | } | |
344 | ||
345 | struct regcache * | |
5b6d1e4f PA |
346 | get_thread_arch_regcache (process_stratum_target *target, ptid_t ptid, |
347 | struct gdbarch *gdbarch) | |
e2d96639 | 348 | { |
5b6d1e4f PA |
349 | scoped_restore_current_inferior restore_current_inferior; |
350 | set_current_inferior (find_inferior_ptid (target, ptid)); | |
ed4227b7 | 351 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 352 | |
5b6d1e4f | 353 | return get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace); |
594f7785 UW |
354 | } |
355 | ||
5b6d1e4f | 356 | static process_stratum_target *current_thread_target; |
c2250ad1 UW |
357 | static ptid_t current_thread_ptid; |
358 | static struct gdbarch *current_thread_arch; | |
359 | ||
360 | struct regcache * | |
5b6d1e4f | 361 | get_thread_regcache (process_stratum_target *target, ptid_t ptid) |
c2250ad1 | 362 | { |
5b6d1e4f PA |
363 | if (!current_thread_arch |
364 | || target != current_thread_target | |
365 | || current_thread_ptid != ptid) | |
c2250ad1 | 366 | { |
5b6d1e4f PA |
367 | gdb_assert (ptid != null_ptid); |
368 | ||
c2250ad1 | 369 | current_thread_ptid = ptid; |
5b6d1e4f PA |
370 | current_thread_target = target; |
371 | ||
372 | scoped_restore_current_inferior restore_current_inferior; | |
373 | set_current_inferior (find_inferior_ptid (target, ptid)); | |
c2250ad1 UW |
374 | current_thread_arch = target_thread_architecture (ptid); |
375 | } | |
376 | ||
5b6d1e4f | 377 | return get_thread_arch_regcache (target, ptid, current_thread_arch); |
c2250ad1 UW |
378 | } |
379 | ||
00431a78 PA |
380 | /* See regcache.h. */ |
381 | ||
382 | struct regcache * | |
383 | get_thread_regcache (thread_info *thread) | |
384 | { | |
5b6d1e4f PA |
385 | return get_thread_regcache (thread->inf->process_target (), |
386 | thread->ptid); | |
00431a78 PA |
387 | } |
388 | ||
c2250ad1 UW |
389 | struct regcache * |
390 | get_current_regcache (void) | |
594f7785 | 391 | { |
00431a78 | 392 | return get_thread_regcache (inferior_thread ()); |
594f7785 | 393 | } |
32178cab | 394 | |
268a13a5 | 395 | /* See gdbsupport/common-regcache.h. */ |
361c8ade GB |
396 | |
397 | struct regcache * | |
398 | get_thread_regcache_for_ptid (ptid_t ptid) | |
399 | { | |
5b6d1e4f PA |
400 | /* This function doesn't take a process_stratum_target parameter |
401 | because it's a gdbsupport/ routine implemented by both gdb and | |
402 | gdbserver. It always refers to a ptid of the current target. */ | |
403 | process_stratum_target *proc_target = current_inferior ()->process_target (); | |
404 | return get_thread_regcache (proc_target, ptid); | |
361c8ade | 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 | { |
174981ae | 420 | for (auto ®cache : regcache::regcaches) |
94bb8dfe | 421 | { |
d7e15655 | 422 | if (regcache->ptid () == old_ptid) |
94bb8dfe YQ |
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 | |
5b6d1e4f | 439 | registers_changed_ptid (process_stratum_target *target, ptid_t ptid) |
32178cab | 440 | { |
174981ae SM |
441 | for (auto oit = regcache::regcaches.before_begin (), it = std::next (oit); |
442 | it != regcache::regcaches.end (); ) | |
c2250ad1 | 443 | { |
5b6d1e4f PA |
444 | struct regcache *regcache = *it; |
445 | if ((target == nullptr || regcache->target () == target) | |
446 | && regcache->ptid ().matches (ptid)) | |
e66408ed | 447 | { |
5b6d1e4f | 448 | delete regcache; |
174981ae | 449 | it = regcache::regcaches.erase_after (oit); |
e66408ed | 450 | } |
94bb8dfe YQ |
451 | else |
452 | oit = it++; | |
c2250ad1 | 453 | } |
32178cab | 454 | |
5b6d1e4f PA |
455 | if ((target == nullptr || current_thread_target == target) |
456 | && current_thread_ptid.matches (ptid)) | |
041274d8 | 457 | { |
5b6d1e4f | 458 | current_thread_target = NULL; |
041274d8 PA |
459 | current_thread_ptid = null_ptid; |
460 | current_thread_arch = NULL; | |
461 | } | |
32178cab | 462 | |
5b6d1e4f PA |
463 | if ((target == nullptr || current_inferior ()->process_target () == target) |
464 | && inferior_ptid.matches (ptid)) | |
041274d8 PA |
465 | { |
466 | /* We just deleted the regcache of the current thread. Need to | |
467 | forget about any frames we have cached, too. */ | |
468 | reinit_frame_cache (); | |
469 | } | |
470 | } | |
c2250ad1 | 471 | |
00431a78 PA |
472 | /* See regcache.h. */ |
473 | ||
474 | void | |
475 | registers_changed_thread (thread_info *thread) | |
476 | { | |
5b6d1e4f | 477 | registers_changed_ptid (thread->inf->process_target (), thread->ptid); |
00431a78 PA |
478 | } |
479 | ||
041274d8 PA |
480 | void |
481 | registers_changed (void) | |
482 | { | |
5b6d1e4f | 483 | registers_changed_ptid (nullptr, minus_one_ptid); |
32178cab MS |
484 | } |
485 | ||
ef79d9a3 YQ |
486 | void |
487 | regcache::raw_update (int regnum) | |
488 | { | |
4e888c28 | 489 | assert_regnum (regnum); |
8e368124 | 490 | |
3fadccb3 AC |
491 | /* Make certain that the register cache is up-to-date with respect |
492 | to the current thread. This switching shouldn't be necessary | |
493 | only there is still only one target side register cache. Sigh! | |
494 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 495 | |
796bb026 | 496 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 497 | { |
ef79d9a3 | 498 | target_fetch_registers (this, regnum); |
788c8b10 PA |
499 | |
500 | /* A number of targets can't access the whole set of raw | |
501 | registers (because the debug API provides no means to get at | |
502 | them). */ | |
ef79d9a3 YQ |
503 | if (m_register_status[regnum] == REG_UNKNOWN) |
504 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 505 | } |
8e368124 AH |
506 | } |
507 | ||
ef79d9a3 | 508 | enum register_status |
849d0ba8 | 509 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
510 | { |
511 | gdb_assert (buf != NULL); | |
ef79d9a3 | 512 | raw_update (regnum); |
05d1431c | 513 | |
ef79d9a3 YQ |
514 | if (m_register_status[regnum] != REG_VALID) |
515 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 516 | else |
ef79d9a3 YQ |
517 | memcpy (buf, register_buffer (regnum), |
518 | m_descr->sizeof_register[regnum]); | |
05d1431c | 519 | |
aac0d564 | 520 | return m_register_status[regnum]; |
61a0eb5b AC |
521 | } |
522 | ||
05d1431c | 523 | enum register_status |
28fc6740 | 524 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
525 | { |
526 | gdb_assert (regcache != NULL); | |
6f98355c | 527 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
528 | } |
529 | ||
6f98355c | 530 | template<typename T, typename> |
ef79d9a3 | 531 | enum register_status |
849d0ba8 | 532 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 533 | { |
2d522557 | 534 | gdb_byte *buf; |
05d1431c | 535 | enum register_status status; |
123f5f96 | 536 | |
4e888c28 | 537 | assert_regnum (regnum); |
ef79d9a3 YQ |
538 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
539 | status = raw_read (regnum, buf); | |
05d1431c | 540 | if (status == REG_VALID) |
6f98355c YQ |
541 | *val = extract_integer<T> (buf, |
542 | m_descr->sizeof_register[regnum], | |
543 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
544 | else |
545 | *val = 0; | |
546 | return status; | |
28fc6740 AC |
547 | } |
548 | ||
05d1431c | 549 | enum register_status |
28fc6740 AC |
550 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
551 | ULONGEST *val) | |
ef79d9a3 YQ |
552 | { |
553 | gdb_assert (regcache != NULL); | |
6f98355c | 554 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
555 | } |
556 | ||
c00dcbe9 MK |
557 | void |
558 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
559 | { |
560 | gdb_assert (regcache != NULL); | |
6f98355c | 561 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
562 | } |
563 | ||
6f98355c | 564 | template<typename T, typename> |
ef79d9a3 | 565 | void |
6f98355c | 566 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 567 | { |
7c543f7b | 568 | gdb_byte *buf; |
123f5f96 | 569 | |
4e888c28 | 570 | assert_regnum (regnum); |
ef79d9a3 | 571 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
572 | store_integer (buf, m_descr->sizeof_register[regnum], |
573 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 574 | raw_write (regnum, buf); |
c00dcbe9 MK |
575 | } |
576 | ||
577 | void | |
578 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
579 | ULONGEST val) | |
ef79d9a3 YQ |
580 | { |
581 | gdb_assert (regcache != NULL); | |
6f98355c | 582 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
583 | } |
584 | ||
9fd15b2e YQ |
585 | LONGEST |
586 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
587 | { | |
588 | LONGEST value; | |
589 | enum register_status status; | |
590 | ||
591 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
592 | if (status == REG_UNAVAILABLE) | |
593 | throw_error (NOT_AVAILABLE_ERROR, | |
594 | _("Register %d is not available"), regnum); | |
595 | return value; | |
596 | } | |
597 | ||
ef79d9a3 | 598 | enum register_status |
849d0ba8 | 599 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 600 | { |
d138e37a | 601 | gdb_assert (regnum >= 0); |
ef79d9a3 | 602 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 603 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 604 | return raw_read (regnum, buf); |
849d0ba8 | 605 | else if (m_has_pseudo |
ef79d9a3 | 606 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 607 | { |
ef79d9a3 YQ |
608 | if (m_register_status[regnum] == REG_VALID) |
609 | memcpy (buf, register_buffer (regnum), | |
610 | m_descr->sizeof_register[regnum]); | |
05d1431c | 611 | else |
ef79d9a3 | 612 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 613 | |
aac0d564 | 614 | return m_register_status[regnum]; |
05d1431c | 615 | } |
ef79d9a3 | 616 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
617 | { |
618 | struct value *mark, *computed; | |
619 | enum register_status result = REG_VALID; | |
620 | ||
621 | mark = value_mark (); | |
622 | ||
ef79d9a3 YQ |
623 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
624 | this, regnum); | |
3543a589 TT |
625 | if (value_entirely_available (computed)) |
626 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 627 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
628 | else |
629 | { | |
ef79d9a3 | 630 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
631 | result = REG_UNAVAILABLE; |
632 | } | |
633 | ||
634 | value_free_to_mark (mark); | |
635 | ||
636 | return result; | |
637 | } | |
d138e37a | 638 | else |
ef79d9a3 | 639 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 640 | regnum, buf); |
61a0eb5b AC |
641 | } |
642 | ||
ef79d9a3 | 643 | struct value * |
849d0ba8 | 644 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
645 | { |
646 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 647 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 648 | |
d999647b | 649 | if (regnum < num_raw_registers () |
849d0ba8 | 650 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 651 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
652 | { |
653 | struct value *result; | |
654 | ||
ef79d9a3 | 655 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
656 | VALUE_LVAL (result) = lval_register; |
657 | VALUE_REGNUM (result) = regnum; | |
658 | ||
659 | /* It is more efficient in general to do this delegation in this | |
660 | direction than in the other one, even though the value-based | |
661 | API is preferred. */ | |
ef79d9a3 YQ |
662 | if (cooked_read (regnum, |
663 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
664 | mark_value_bytes_unavailable (result, 0, |
665 | TYPE_LENGTH (value_type (result))); | |
666 | ||
667 | return result; | |
668 | } | |
669 | else | |
ef79d9a3 YQ |
670 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
671 | this, regnum); | |
3543a589 TT |
672 | } |
673 | ||
05d1431c | 674 | enum register_status |
a378f419 AC |
675 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
676 | LONGEST *val) | |
ef79d9a3 YQ |
677 | { |
678 | gdb_assert (regcache != NULL); | |
6f98355c | 679 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
680 | } |
681 | ||
6f98355c | 682 | template<typename T, typename> |
ef79d9a3 | 683 | enum register_status |
849d0ba8 | 684 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 685 | { |
05d1431c | 686 | enum register_status status; |
2d522557 | 687 | gdb_byte *buf; |
123f5f96 | 688 | |
ef79d9a3 YQ |
689 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
690 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
691 | status = cooked_read (regnum, buf); | |
05d1431c | 692 | if (status == REG_VALID) |
6f98355c YQ |
693 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
694 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
695 | else |
696 | *val = 0; | |
697 | return status; | |
a378f419 AC |
698 | } |
699 | ||
05d1431c | 700 | enum register_status |
a378f419 AC |
701 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
702 | ULONGEST *val) | |
ef79d9a3 YQ |
703 | { |
704 | gdb_assert (regcache != NULL); | |
6f98355c | 705 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
706 | } |
707 | ||
a66a9c23 AC |
708 | void |
709 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
710 | LONGEST val) | |
ef79d9a3 YQ |
711 | { |
712 | gdb_assert (regcache != NULL); | |
6f98355c | 713 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
714 | } |
715 | ||
6f98355c | 716 | template<typename T, typename> |
ef79d9a3 | 717 | void |
6f98355c | 718 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 719 | { |
7c543f7b | 720 | gdb_byte *buf; |
123f5f96 | 721 | |
ef79d9a3 YQ |
722 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
723 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
724 | store_integer (buf, m_descr->sizeof_register[regnum], |
725 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 726 | cooked_write (regnum, buf); |
a66a9c23 AC |
727 | } |
728 | ||
729 | void | |
730 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
731 | ULONGEST val) | |
ef79d9a3 YQ |
732 | { |
733 | gdb_assert (regcache != NULL); | |
6f98355c | 734 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
735 | } |
736 | ||
ef79d9a3 YQ |
737 | void |
738 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 739 | { |
594f7785 | 740 | |
ef79d9a3 | 741 | gdb_assert (buf != NULL); |
4e888c28 | 742 | assert_regnum (regnum); |
3fadccb3 | 743 | |
3fadccb3 AC |
744 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
745 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 746 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
747 | return; |
748 | ||
3fadccb3 | 749 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 750 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
751 | if (get_register_status (regnum) == REG_VALID |
752 | && (memcmp (register_buffer (regnum), buf, | |
753 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
754 | return; |
755 | ||
ef79d9a3 | 756 | target_prepare_to_store (this); |
c8ec2f33 | 757 | raw_supply (regnum, buf); |
b94ade42 | 758 | |
b292235f TT |
759 | /* Invalidate the register after it is written, in case of a |
760 | failure. */ | |
311dc83a TT |
761 | auto invalidator |
762 | = make_scope_exit ([&] { this->invalidate (regnum); }); | |
b94ade42 | 763 | |
ef79d9a3 | 764 | target_store_registers (this, regnum); |
594f7785 | 765 | |
b292235f TT |
766 | /* The target did not throw an error so we can discard invalidating |
767 | the register. */ | |
768 | invalidator.release (); | |
61a0eb5b AC |
769 | } |
770 | ||
ef79d9a3 YQ |
771 | void |
772 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 773 | { |
d138e37a | 774 | gdb_assert (regnum >= 0); |
ef79d9a3 | 775 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 776 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 777 | raw_write (regnum, buf); |
d138e37a | 778 | else |
ef79d9a3 | 779 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 780 | regnum, buf); |
61a0eb5b AC |
781 | } |
782 | ||
33bab475 | 783 | /* See regcache.h. */ |
06c0b04e | 784 | |
ef79d9a3 | 785 | enum register_status |
33bab475 AH |
786 | readable_regcache::read_part (int regnum, int offset, int len, |
787 | gdb_byte *out, bool is_raw) | |
849d0ba8 | 788 | { |
33bab475 AH |
789 | int reg_size = register_size (arch (), regnum); |
790 | ||
791 | gdb_assert (out != NULL); | |
8e7767e3 AH |
792 | gdb_assert (offset >= 0 && offset <= reg_size); |
793 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
794 | |
795 | if (offset == 0 && len == 0) | |
796 | { | |
797 | /* Nothing to do. */ | |
798 | return REG_VALID; | |
799 | } | |
800 | ||
801 | if (offset == 0 && len == reg_size) | |
802 | { | |
803 | /* Read the full register. */ | |
804 | return (is_raw) ? raw_read (regnum, out) : cooked_read (regnum, out); | |
805 | } | |
849d0ba8 | 806 | |
849d0ba8 | 807 | enum register_status status; |
33bab475 | 808 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); |
849d0ba8 | 809 | |
33bab475 AH |
810 | /* Read full register to buffer. */ |
811 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
849d0ba8 YQ |
812 | if (status != REG_VALID) |
813 | return status; | |
814 | ||
33bab475 AH |
815 | /* Copy out. */ |
816 | memcpy (out, reg + offset, len); | |
849d0ba8 YQ |
817 | return REG_VALID; |
818 | } | |
819 | ||
33bab475 AH |
820 | /* See regcache.h. */ |
821 | ||
8e7767e3 AH |
822 | void |
823 | reg_buffer::raw_collect_part (int regnum, int offset, int len, | |
824 | gdb_byte *out) const | |
825 | { | |
826 | int reg_size = register_size (arch (), regnum); | |
827 | ||
828 | gdb_assert (out != nullptr); | |
829 | gdb_assert (offset >= 0 && offset <= reg_size); | |
830 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
831 | ||
832 | if (offset == 0 && len == 0) | |
833 | { | |
834 | /* Nothing to do. */ | |
835 | return; | |
836 | } | |
837 | ||
838 | if (offset == 0 && len == reg_size) | |
839 | { | |
840 | /* Collect the full register. */ | |
841 | return raw_collect (regnum, out); | |
842 | } | |
843 | ||
844 | /* Read to buffer, then write out. */ | |
845 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
846 | raw_collect (regnum, reg); | |
847 | memcpy (out, reg + offset, len); | |
848 | } | |
849 | ||
850 | /* See regcache.h. */ | |
851 | ||
849d0ba8 YQ |
852 | enum register_status |
853 | regcache::write_part (int regnum, int offset, int len, | |
33bab475 | 854 | const gdb_byte *in, bool is_raw) |
ef79d9a3 | 855 | { |
33bab475 | 856 | int reg_size = register_size (arch (), regnum); |
123f5f96 | 857 | |
33bab475 | 858 | gdb_assert (in != NULL); |
8e7767e3 AH |
859 | gdb_assert (offset >= 0 && offset <= reg_size); |
860 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
861 | |
862 | if (offset == 0 && len == 0) | |
06c0b04e | 863 | { |
33bab475 AH |
864 | /* Nothing to do. */ |
865 | return REG_VALID; | |
866 | } | |
05d1431c | 867 | |
33bab475 AH |
868 | if (offset == 0 && len == reg_size) |
869 | { | |
870 | /* Write the full register. */ | |
871 | (is_raw) ? raw_write (regnum, in) : cooked_write (regnum, in); | |
872 | return REG_VALID; | |
06c0b04e | 873 | } |
849d0ba8 | 874 | |
33bab475 AH |
875 | enum register_status status; |
876 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
05d1431c | 877 | |
33bab475 AH |
878 | /* Read existing register to buffer. */ |
879 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
880 | if (status != REG_VALID) | |
881 | return status; | |
882 | ||
883 | /* Update buffer, then write back to regcache. */ | |
884 | memcpy (reg + offset, in, len); | |
885 | is_raw ? raw_write (regnum, reg) : cooked_write (regnum, reg); | |
05d1431c | 886 | return REG_VALID; |
06c0b04e AC |
887 | } |
888 | ||
33bab475 AH |
889 | /* See regcache.h. */ |
890 | ||
8e7767e3 AH |
891 | void |
892 | reg_buffer::raw_supply_part (int regnum, int offset, int len, | |
893 | const gdb_byte *in) | |
894 | { | |
895 | int reg_size = register_size (arch (), regnum); | |
896 | ||
897 | gdb_assert (in != nullptr); | |
898 | gdb_assert (offset >= 0 && offset <= reg_size); | |
899 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
900 | ||
901 | if (offset == 0 && len == 0) | |
902 | { | |
903 | /* Nothing to do. */ | |
904 | return; | |
905 | } | |
906 | ||
907 | if (offset == 0 && len == reg_size) | |
908 | { | |
909 | /* Supply the full register. */ | |
910 | return raw_supply (regnum, in); | |
911 | } | |
912 | ||
913 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
914 | ||
915 | /* Read existing value to buffer. */ | |
916 | raw_collect (regnum, reg); | |
917 | ||
918 | /* Write to buffer, then write out. */ | |
919 | memcpy (reg + offset, in, len); | |
920 | raw_supply (regnum, reg); | |
921 | } | |
922 | ||
ef79d9a3 | 923 | enum register_status |
33bab475 AH |
924 | readable_regcache::raw_read_part (int regnum, int offset, int len, |
925 | gdb_byte *buf) | |
ef79d9a3 | 926 | { |
4e888c28 | 927 | assert_regnum (regnum); |
849d0ba8 | 928 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
929 | } |
930 | ||
4f0420fd | 931 | /* See regcache.h. */ |
123f5f96 | 932 | |
ef79d9a3 YQ |
933 | void |
934 | regcache::raw_write_part (int regnum, int offset, int len, | |
935 | const gdb_byte *buf) | |
936 | { | |
4e888c28 | 937 | assert_regnum (regnum); |
849d0ba8 | 938 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
939 | } |
940 | ||
33bab475 AH |
941 | /* See regcache.h. */ |
942 | ||
ef79d9a3 | 943 | enum register_status |
849d0ba8 YQ |
944 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
945 | gdb_byte *buf) | |
ef79d9a3 YQ |
946 | { |
947 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 948 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
949 | } |
950 | ||
33bab475 AH |
951 | /* See regcache.h. */ |
952 | ||
ef79d9a3 YQ |
953 | void |
954 | regcache::cooked_write_part (int regnum, int offset, int len, | |
955 | const gdb_byte *buf) | |
956 | { | |
957 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 958 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 959 | } |
32178cab | 960 | |
268a13a5 | 961 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 962 | |
ef79d9a3 | 963 | void |
9c861883 | 964 | reg_buffer::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
965 | { |
966 | void *regbuf; | |
967 | size_t size; | |
968 | ||
4e888c28 | 969 | assert_regnum (regnum); |
9a661b68 | 970 | |
ef79d9a3 YQ |
971 | regbuf = register_buffer (regnum); |
972 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
973 | |
974 | if (buf) | |
ee99023e PA |
975 | { |
976 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 977 | m_register_status[regnum] = REG_VALID; |
ee99023e | 978 | } |
9a661b68 | 979 | else |
ee99023e PA |
980 | { |
981 | /* This memset not strictly necessary, but better than garbage | |
982 | in case the register value manages to escape somewhere (due | |
983 | to a bug, no less). */ | |
984 | memset (regbuf, 0, size); | |
ef79d9a3 | 985 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 986 | } |
9a661b68 MK |
987 | } |
988 | ||
9c861883 | 989 | /* See regcache.h. */ |
b057297a AH |
990 | |
991 | void | |
9c861883 AH |
992 | reg_buffer::raw_supply_integer (int regnum, const gdb_byte *addr, |
993 | int addr_len, bool is_signed) | |
b057297a AH |
994 | { |
995 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
996 | gdb_byte *regbuf; | |
997 | size_t regsize; | |
998 | ||
4e888c28 | 999 | assert_regnum (regnum); |
b057297a AH |
1000 | |
1001 | regbuf = register_buffer (regnum); | |
1002 | regsize = m_descr->sizeof_register[regnum]; | |
1003 | ||
1004 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
1005 | byte_order); | |
1006 | m_register_status[regnum] = REG_VALID; | |
1007 | } | |
1008 | ||
9c861883 | 1009 | /* See regcache.h. */ |
f81fdd35 AH |
1010 | |
1011 | void | |
9c861883 | 1012 | reg_buffer::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1013 | { |
1014 | void *regbuf; | |
1015 | size_t size; | |
1016 | ||
4e888c28 | 1017 | assert_regnum (regnum); |
f81fdd35 AH |
1018 | |
1019 | regbuf = register_buffer (regnum); | |
1020 | size = m_descr->sizeof_register[regnum]; | |
1021 | ||
1022 | memset (regbuf, 0, size); | |
1023 | m_register_status[regnum] = REG_VALID; | |
1024 | } | |
1025 | ||
268a13a5 | 1026 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 1027 | |
ef79d9a3 | 1028 | void |
9c861883 | 1029 | reg_buffer::raw_collect (int regnum, void *buf) const |
9a661b68 MK |
1030 | { |
1031 | const void *regbuf; | |
1032 | size_t size; | |
1033 | ||
ef79d9a3 | 1034 | gdb_assert (buf != NULL); |
4e888c28 | 1035 | assert_regnum (regnum); |
9a661b68 | 1036 | |
ef79d9a3 YQ |
1037 | regbuf = register_buffer (regnum); |
1038 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1039 | memcpy (buf, regbuf, size); |
1040 | } | |
1041 | ||
9c861883 | 1042 | /* See regcache.h. */ |
b057297a AH |
1043 | |
1044 | void | |
9c861883 AH |
1045 | reg_buffer::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
1046 | bool is_signed) const | |
b057297a AH |
1047 | { |
1048 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1049 | const gdb_byte *regbuf; | |
1050 | size_t regsize; | |
1051 | ||
4e888c28 | 1052 | assert_regnum (regnum); |
b057297a AH |
1053 | |
1054 | regbuf = register_buffer (regnum); | |
1055 | regsize = m_descr->sizeof_register[regnum]; | |
1056 | ||
1057 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
1058 | byte_order); | |
1059 | } | |
1060 | ||
8e7767e3 AH |
1061 | /* See regcache.h. */ |
1062 | ||
1063 | void | |
1064 | regcache::transfer_regset_register (struct regcache *out_regcache, int regnum, | |
1065 | const gdb_byte *in_buf, gdb_byte *out_buf, | |
1066 | int slot_size, int offs) const | |
1067 | { | |
1068 | struct gdbarch *gdbarch = arch (); | |
1069 | int reg_size = std::min (register_size (gdbarch, regnum), slot_size); | |
1070 | ||
1071 | /* Use part versions and reg_size to prevent possible buffer overflows when | |
1072 | accessing the regcache. */ | |
1073 | ||
1074 | if (out_buf != nullptr) | |
1075 | { | |
1076 | raw_collect_part (regnum, 0, reg_size, out_buf + offs); | |
1077 | ||
1078 | /* Ensure any additional space is cleared. */ | |
1079 | if (slot_size > reg_size) | |
1080 | memset (out_buf + offs + reg_size, 0, slot_size - reg_size); | |
1081 | } | |
1082 | else if (in_buf != nullptr) | |
1083 | out_regcache->raw_supply_part (regnum, 0, reg_size, in_buf + offs); | |
1084 | else | |
1085 | { | |
1086 | /* Invalidate the register. */ | |
1087 | out_regcache->raw_supply (regnum, nullptr); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* See regcache.h. */ | |
9c861883 | 1092 | |
ef79d9a3 YQ |
1093 | void |
1094 | regcache::transfer_regset (const struct regset *regset, | |
1095 | struct regcache *out_regcache, | |
8e7767e3 AH |
1096 | int regnum, const gdb_byte *in_buf, |
1097 | gdb_byte *out_buf, size_t size) const | |
0b309272 AA |
1098 | { |
1099 | const struct regcache_map_entry *map; | |
1100 | int offs = 0, count; | |
1101 | ||
19ba03f4 SM |
1102 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1103 | (count = map->count) != 0; | |
1104 | map++) | |
0b309272 AA |
1105 | { |
1106 | int regno = map->regno; | |
1107 | int slot_size = map->size; | |
1108 | ||
1109 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1110 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1111 | |
1112 | if (regno == REGCACHE_MAP_SKIP | |
1113 | || (regnum != -1 | |
1114 | && (regnum < regno || regnum >= regno + count))) | |
1115 | offs += count * slot_size; | |
1116 | ||
1117 | else if (regnum == -1) | |
1118 | for (; count--; regno++, offs += slot_size) | |
1119 | { | |
1120 | if (offs + slot_size > size) | |
1121 | break; | |
1122 | ||
8e7767e3 AH |
1123 | transfer_regset_register (out_regcache, regno, in_buf, out_buf, |
1124 | slot_size, offs); | |
0b309272 AA |
1125 | } |
1126 | else | |
1127 | { | |
1128 | /* Transfer a single register and return. */ | |
1129 | offs += (regnum - regno) * slot_size; | |
1130 | if (offs + slot_size > size) | |
1131 | return; | |
1132 | ||
8e7767e3 AH |
1133 | transfer_regset_register (out_regcache, regnum, in_buf, out_buf, |
1134 | slot_size, offs); | |
0b309272 AA |
1135 | return; |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1141 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1142 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1143 | ||
1144 | void | |
1145 | regcache_supply_regset (const struct regset *regset, | |
1146 | struct regcache *regcache, | |
1147 | int regnum, const void *buf, size_t size) | |
1148 | { | |
8e7767e3 | 1149 | regcache->supply_regset (regset, regnum, (const gdb_byte *) buf, size); |
ef79d9a3 YQ |
1150 | } |
1151 | ||
1152 | void | |
1153 | regcache::supply_regset (const struct regset *regset, | |
1154 | int regnum, const void *buf, size_t size) | |
1155 | { | |
8e7767e3 | 1156 | transfer_regset (regset, this, regnum, (const gdb_byte *) buf, nullptr, size); |
0b309272 AA |
1157 | } |
1158 | ||
1159 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1160 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1161 | REGSET. */ | |
1162 | ||
1163 | void | |
1164 | regcache_collect_regset (const struct regset *regset, | |
1165 | const struct regcache *regcache, | |
1166 | int regnum, void *buf, size_t size) | |
1167 | { | |
8e7767e3 | 1168 | regcache->collect_regset (regset, regnum, (gdb_byte *) buf, size); |
ef79d9a3 YQ |
1169 | } |
1170 | ||
1171 | void | |
1172 | regcache::collect_regset (const struct regset *regset, | |
1173 | int regnum, void *buf, size_t size) const | |
1174 | { | |
8e7767e3 | 1175 | transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size); |
0b309272 AA |
1176 | } |
1177 | ||
268a13a5 | 1178 | /* See gdbsupport/common-regcache.h. */ |
f868386e AH |
1179 | |
1180 | bool | |
1181 | reg_buffer::raw_compare (int regnum, const void *buf, int offset) const | |
1182 | { | |
1183 | gdb_assert (buf != NULL); | |
1184 | assert_regnum (regnum); | |
1185 | ||
1186 | const char *regbuf = (const char *) register_buffer (regnum); | |
1187 | size_t size = m_descr->sizeof_register[regnum]; | |
1188 | gdb_assert (size >= offset); | |
1189 | ||
1190 | return (memcmp (buf, regbuf + offset, size - offset) == 0); | |
1191 | } | |
193cb69f | 1192 | |
515630c5 | 1193 | /* Special handling for register PC. */ |
32178cab MS |
1194 | |
1195 | CORE_ADDR | |
515630c5 | 1196 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1197 | { |
ac7936df | 1198 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1199 | |
32178cab MS |
1200 | CORE_ADDR pc_val; |
1201 | ||
61a1198a UW |
1202 | if (gdbarch_read_pc_p (gdbarch)) |
1203 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1204 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1205 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1206 | { |
61a1198a | 1207 | ULONGEST raw_val; |
123f5f96 | 1208 | |
05d1431c PA |
1209 | if (regcache_cooked_read_unsigned (regcache, |
1210 | gdbarch_pc_regnum (gdbarch), | |
1211 | &raw_val) == REG_UNAVAILABLE) | |
1212 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1213 | ||
214e098a | 1214 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1215 | } |
1216 | else | |
515630c5 UW |
1217 | internal_error (__FILE__, __LINE__, |
1218 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1219 | return pc_val; |
1220 | } | |
1221 | ||
fc75c28b TBA |
1222 | /* See gdbsupport/common-regcache.h. */ |
1223 | ||
1224 | CORE_ADDR | |
1225 | regcache_read_pc_protected (regcache *regcache) | |
1226 | { | |
1227 | CORE_ADDR pc; | |
1228 | try | |
1229 | { | |
1230 | pc = regcache_read_pc (regcache); | |
1231 | } | |
1232 | catch (const gdb_exception_error &ex) | |
1233 | { | |
1234 | pc = 0; | |
1235 | } | |
1236 | ||
1237 | return pc; | |
1238 | } | |
1239 | ||
32178cab | 1240 | void |
515630c5 | 1241 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1242 | { |
ac7936df | 1243 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1244 | |
61a1198a UW |
1245 | if (gdbarch_write_pc_p (gdbarch)) |
1246 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1247 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1248 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1249 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1250 | else |
1251 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1252 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1253 | |
1254 | /* Writing the PC (for instance, from "load") invalidates the | |
1255 | current frame. */ | |
1256 | reinit_frame_cache (); | |
32178cab MS |
1257 | } |
1258 | ||
d999647b | 1259 | int |
31716595 | 1260 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1261 | { |
1262 | return gdbarch_num_regs (arch ()); | |
1263 | } | |
1264 | ||
ed771251 | 1265 | void |
ef79d9a3 | 1266 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1267 | { |
ef79d9a3 | 1268 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1269 | |
1270 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1271 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1272 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1273 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1274 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1275 | gdbarch_register_name (gdbarch, regno)); | |
1276 | else | |
1277 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1278 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1279 | { | |
1280 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1281 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1282 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1283 | |
1284 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1285 | for (int i = 0; i < size; i++) | |
1286 | { | |
1287 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1288 | } | |
1289 | if (size <= sizeof (LONGEST)) | |
1290 | { | |
1291 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1292 | ||
1293 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1294 | core_addr_to_string_nz (val), plongest (val)); | |
1295 | } | |
1296 | } | |
1297 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1298 | } | |
32178cab | 1299 | |
705152c5 | 1300 | static void |
0b39b52e | 1301 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1302 | { |
1303 | /* Force-flush the register cache. */ | |
1304 | registers_changed (); | |
1305 | if (from_tty) | |
a3f17187 | 1306 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1307 | } |
1308 | ||
4c74fe6b YQ |
1309 | void |
1310 | register_dump::dump (ui_file *file) | |
af030b9a | 1311 | { |
4c74fe6b YQ |
1312 | auto descr = regcache_descr (m_gdbarch); |
1313 | int regnum; | |
1314 | int footnote_nr = 0; | |
1315 | int footnote_register_offset = 0; | |
1316 | int footnote_register_type_name_null = 0; | |
1317 | long register_offset = 0; | |
af030b9a | 1318 | |
4c74fe6b | 1319 | gdb_assert (descr->nr_cooked_registers |
f6efe3f8 | 1320 | == gdbarch_num_cooked_regs (m_gdbarch)); |
af030b9a | 1321 | |
4c74fe6b YQ |
1322 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1323 | { | |
1324 | /* Name. */ | |
1325 | if (regnum < 0) | |
1326 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1327 | else | |
1328 | { | |
1329 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1330 | |
4c74fe6b YQ |
1331 | if (p == NULL) |
1332 | p = ""; | |
1333 | else if (p[0] == '\0') | |
1334 | p = "''"; | |
1335 | fprintf_unfiltered (file, " %-10s", p); | |
1336 | } | |
af030b9a | 1337 | |
4c74fe6b YQ |
1338 | /* Number. */ |
1339 | if (regnum < 0) | |
1340 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1341 | else | |
1342 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1343 | |
4c74fe6b YQ |
1344 | /* Relative number. */ |
1345 | if (regnum < 0) | |
1346 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1347 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1348 | fprintf_unfiltered (file, " %4d", regnum); | |
1349 | else | |
1350 | fprintf_unfiltered (file, " %4d", | |
1351 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1352 | |
4c74fe6b YQ |
1353 | /* Offset. */ |
1354 | if (regnum < 0) | |
1355 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1356 | else | |
af030b9a | 1357 | { |
4c74fe6b YQ |
1358 | fprintf_unfiltered (file, " %6ld", |
1359 | descr->register_offset[regnum]); | |
1360 | if (register_offset != descr->register_offset[regnum] | |
1361 | || (regnum > 0 | |
1362 | && (descr->register_offset[regnum] | |
1363 | != (descr->register_offset[regnum - 1] | |
1364 | + descr->sizeof_register[regnum - 1]))) | |
1365 | ) | |
af030b9a | 1366 | { |
4c74fe6b YQ |
1367 | if (!footnote_register_offset) |
1368 | footnote_register_offset = ++footnote_nr; | |
1369 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1370 | } |
4c74fe6b YQ |
1371 | else |
1372 | fprintf_unfiltered (file, " "); | |
1373 | register_offset = (descr->register_offset[regnum] | |
1374 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1375 | } |
1376 | ||
4c74fe6b YQ |
1377 | /* Size. */ |
1378 | if (regnum < 0) | |
1379 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1380 | else | |
1381 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1382 | |
4c74fe6b | 1383 | /* Type. */ |
f3384e66 | 1384 | { |
4c74fe6b YQ |
1385 | const char *t; |
1386 | std::string name_holder; | |
b59ff9d5 | 1387 | |
4c74fe6b YQ |
1388 | if (regnum < 0) |
1389 | t = "Type"; | |
215c69dc YQ |
1390 | else |
1391 | { | |
4c74fe6b | 1392 | static const char blt[] = "builtin_type"; |
123f5f96 | 1393 | |
7d93a1e0 | 1394 | t = register_type (m_gdbarch, regnum)->name (); |
4c74fe6b | 1395 | if (t == NULL) |
f3384e66 | 1396 | { |
4c74fe6b YQ |
1397 | if (!footnote_register_type_name_null) |
1398 | footnote_register_type_name_null = ++footnote_nr; | |
1399 | name_holder = string_printf ("*%d", | |
1400 | footnote_register_type_name_null); | |
1401 | t = name_holder.c_str (); | |
f3384e66 | 1402 | } |
4c74fe6b YQ |
1403 | /* Chop a leading builtin_type. */ |
1404 | if (startswith (t, blt)) | |
1405 | t += strlen (blt); | |
f3384e66 | 1406 | } |
4c74fe6b | 1407 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1408 | } |
f3384e66 | 1409 | |
4c74fe6b YQ |
1410 | /* Leading space always present. */ |
1411 | fprintf_unfiltered (file, " "); | |
af030b9a | 1412 | |
4c74fe6b | 1413 | dump_reg (file, regnum); |
ed4227b7 | 1414 | |
4c74fe6b | 1415 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1416 | } |
1417 | ||
4c74fe6b YQ |
1418 | if (footnote_register_offset) |
1419 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1420 | footnote_register_offset); | |
1421 | if (footnote_register_type_name_null) | |
1422 | fprintf_unfiltered (file, | |
1423 | "*%d: Register type's name NULL.\n", | |
1424 | footnote_register_type_name_null); | |
c21236dc PA |
1425 | } |
1426 | ||
8248946c | 1427 | #if GDB_SELF_TEST |
268a13a5 | 1428 | #include "gdbsupport/selftest.h" |
1b30aaa5 | 1429 | #include "selftest-arch.h" |
ec7a5fcb | 1430 | #include "target-float.h" |
8248946c YQ |
1431 | |
1432 | namespace selftests { | |
1433 | ||
e521e87e | 1434 | class regcache_access : public regcache |
8248946c | 1435 | { |
e521e87e YQ |
1436 | public: |
1437 | ||
174981ae | 1438 | /* Return the number of elements in regcache::regcaches. */ |
e521e87e YQ |
1439 | |
1440 | static size_t | |
174981ae | 1441 | regcaches_size () |
e521e87e | 1442 | { |
174981ae SM |
1443 | return std::distance (regcache::regcaches.begin (), |
1444 | regcache::regcaches.end ()); | |
e521e87e YQ |
1445 | } |
1446 | }; | |
8248946c | 1447 | |
5b6d1e4f PA |
1448 | /* Wrapper around get_thread_arch_aspace_regcache that does some self checks. */ |
1449 | ||
1450 | static void | |
1451 | test_get_thread_arch_aspace_regcache (process_stratum_target *target, | |
1452 | ptid_t ptid, struct gdbarch *gdbarch, | |
1453 | address_space *aspace) | |
1454 | { | |
1455 | struct regcache *regcache | |
1456 | = get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace); | |
1457 | SELF_CHECK (regcache != NULL); | |
1458 | SELF_CHECK (regcache->target () == target); | |
1459 | SELF_CHECK (regcache->ptid () == ptid); | |
1460 | SELF_CHECK (regcache->aspace () == aspace); | |
1461 | } | |
1462 | ||
8248946c | 1463 | static void |
174981ae | 1464 | regcaches_test () |
8248946c YQ |
1465 | { |
1466 | /* It is empty at the start. */ | |
174981ae | 1467 | SELF_CHECK (regcache_access::regcaches_size () == 0); |
8248946c YQ |
1468 | |
1469 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1470 | ||
5b6d1e4f PA |
1471 | test_target_ops test_target1; |
1472 | test_target_ops test_target2; | |
8248946c | 1473 | |
5b6d1e4f | 1474 | /* Get regcache from (target1,ptid1), a new regcache is added to |
174981ae | 1475 | regcache::regcaches. */ |
5b6d1e4f PA |
1476 | test_get_thread_arch_aspace_regcache (&test_target1, ptid1, |
1477 | target_gdbarch (), | |
1478 | NULL); | |
174981ae | 1479 | SELF_CHECK (regcache_access::regcaches_size () == 1); |
8248946c | 1480 | |
5b6d1e4f | 1481 | /* Get regcache from (target1,ptid2), a new regcache is added to |
174981ae | 1482 | regcache::regcaches. */ |
5b6d1e4f PA |
1483 | test_get_thread_arch_aspace_regcache (&test_target1, ptid2, |
1484 | target_gdbarch (), | |
1485 | NULL); | |
174981ae | 1486 | SELF_CHECK (regcache_access::regcaches_size () == 2); |
8248946c | 1487 | |
5b6d1e4f | 1488 | /* Get regcache from (target1,ptid3), a new regcache is added to |
174981ae | 1489 | regcache::regcaches. */ |
5b6d1e4f PA |
1490 | test_get_thread_arch_aspace_regcache (&test_target1, ptid3, |
1491 | target_gdbarch (), | |
1492 | NULL); | |
174981ae | 1493 | SELF_CHECK (regcache_access::regcaches_size () == 3); |
8248946c | 1494 | |
5b6d1e4f | 1495 | /* Get regcache from (target1,ptid2) again, nothing is added to |
174981ae | 1496 | regcache::regcaches. */ |
5b6d1e4f PA |
1497 | test_get_thread_arch_aspace_regcache (&test_target1, ptid2, |
1498 | target_gdbarch (), | |
1499 | NULL); | |
174981ae | 1500 | SELF_CHECK (regcache_access::regcaches_size () == 3); |
8248946c | 1501 | |
5b6d1e4f | 1502 | /* Get regcache from (target2,ptid2), a new regcache is added to |
174981ae | 1503 | regcache::regcaches, since this time we're using a differen |
5b6d1e4f PA |
1504 | target. */ |
1505 | test_get_thread_arch_aspace_regcache (&test_target2, ptid2, | |
1506 | target_gdbarch (), | |
1507 | NULL); | |
174981ae | 1508 | SELF_CHECK (regcache_access::regcaches_size () == 4); |
5b6d1e4f PA |
1509 | |
1510 | /* Mark that (target1,ptid2) changed. The regcache of (target1, | |
174981ae | 1511 | ptid2) should be removed from regcache::regcaches. */ |
5b6d1e4f | 1512 | registers_changed_ptid (&test_target1, ptid2); |
174981ae | 1513 | SELF_CHECK (regcache_access::regcaches_size () == 3); |
5b6d1e4f PA |
1514 | |
1515 | /* Get the regcache from (target2,ptid2) again, confirming the | |
1516 | registers_changed_ptid call above did not delete it. */ | |
1517 | test_get_thread_arch_aspace_regcache (&test_target2, ptid2, | |
1518 | target_gdbarch (), | |
1519 | NULL); | |
174981ae | 1520 | SELF_CHECK (regcache_access::regcaches_size () == 3); |
5b6d1e4f PA |
1521 | |
1522 | /* Confirm that marking all regcaches of all targets as changed | |
174981ae | 1523 | clears regcache::regcaches. */ |
5b6d1e4f | 1524 | registers_changed_ptid (nullptr, minus_one_ptid); |
174981ae | 1525 | SELF_CHECK (regcache_access::regcaches_size () == 0); |
8248946c YQ |
1526 | } |
1527 | ||
1b30aaa5 YQ |
1528 | class target_ops_no_register : public test_target_ops |
1529 | { | |
1530 | public: | |
1531 | target_ops_no_register () | |
1532 | : test_target_ops {} | |
f6ac5f3d | 1533 | {} |
1b30aaa5 YQ |
1534 | |
1535 | void reset () | |
1536 | { | |
1537 | fetch_registers_called = 0; | |
1538 | store_registers_called = 0; | |
1539 | xfer_partial_called = 0; | |
1540 | } | |
1541 | ||
f6ac5f3d PA |
1542 | void fetch_registers (regcache *regs, int regno) override; |
1543 | void store_registers (regcache *regs, int regno) override; | |
1544 | ||
1545 | enum target_xfer_status xfer_partial (enum target_object object, | |
1546 | const char *annex, gdb_byte *readbuf, | |
1547 | const gdb_byte *writebuf, | |
1548 | ULONGEST offset, ULONGEST len, | |
1549 | ULONGEST *xfered_len) override; | |
1550 | ||
1b30aaa5 YQ |
1551 | unsigned int fetch_registers_called = 0; |
1552 | unsigned int store_registers_called = 0; | |
1553 | unsigned int xfer_partial_called = 0; | |
1554 | }; | |
1555 | ||
f6ac5f3d PA |
1556 | void |
1557 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1558 | { |
1b30aaa5 YQ |
1559 | /* Mark register available. */ |
1560 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1561 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1562 | } |
1563 | ||
f6ac5f3d PA |
1564 | void |
1565 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1566 | { |
f6ac5f3d | 1567 | this->store_registers_called++; |
1b30aaa5 YQ |
1568 | } |
1569 | ||
f6ac5f3d PA |
1570 | enum target_xfer_status |
1571 | target_ops_no_register::xfer_partial (enum target_object object, | |
1572 | const char *annex, gdb_byte *readbuf, | |
1573 | const gdb_byte *writebuf, | |
1574 | ULONGEST offset, ULONGEST len, | |
1575 | ULONGEST *xfered_len) | |
1b30aaa5 | 1576 | { |
f6ac5f3d | 1577 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1578 | |
1579 | *xfered_len = len; | |
1580 | return TARGET_XFER_OK; | |
1581 | } | |
1582 | ||
1583 | class readwrite_regcache : public regcache | |
1584 | { | |
1585 | public: | |
5b6d1e4f PA |
1586 | readwrite_regcache (process_stratum_target *target, |
1587 | struct gdbarch *gdbarch) | |
1588 | : regcache (target, gdbarch, nullptr) | |
1b30aaa5 YQ |
1589 | {} |
1590 | }; | |
1591 | ||
1592 | /* Test regcache::cooked_read gets registers from raw registers and | |
1593 | memory instead of target to_{fetch,store}_registers. */ | |
1594 | ||
1595 | static void | |
1596 | cooked_read_test (struct gdbarch *gdbarch) | |
1597 | { | |
236ef034 | 1598 | scoped_mock_context<target_ops_no_register> mockctx (gdbarch); |
1b30aaa5 YQ |
1599 | |
1600 | /* Test that read one raw register from regcache_no_target will go | |
1601 | to the target layer. */ | |
1b30aaa5 YQ |
1602 | |
1603 | /* Find a raw register which size isn't zero. */ | |
b926417a TT |
1604 | int nonzero_regnum; |
1605 | for (nonzero_regnum = 0; | |
1606 | nonzero_regnum < gdbarch_num_regs (gdbarch); | |
1607 | nonzero_regnum++) | |
1b30aaa5 | 1608 | { |
b926417a | 1609 | if (register_size (gdbarch, nonzero_regnum) != 0) |
1b30aaa5 YQ |
1610 | break; |
1611 | } | |
1612 | ||
236ef034 | 1613 | readwrite_regcache readwrite (&mockctx.mock_target, gdbarch); |
b926417a | 1614 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, nonzero_regnum)); |
1b30aaa5 | 1615 | |
b926417a | 1616 | readwrite.raw_read (nonzero_regnum, buf.data ()); |
1b30aaa5 YQ |
1617 | |
1618 | /* raw_read calls target_fetch_registers. */ | |
236ef034 PA |
1619 | SELF_CHECK (mockctx.mock_target.fetch_registers_called > 0); |
1620 | mockctx.mock_target.reset (); | |
1b30aaa5 YQ |
1621 | |
1622 | /* Mark all raw registers valid, so the following raw registers | |
1623 | accesses won't go to target. */ | |
1624 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1625 | readwrite.raw_update (i); | |
1626 | ||
236ef034 | 1627 | mockctx.mock_target.reset (); |
1b30aaa5 YQ |
1628 | /* Then, read all raw and pseudo registers, and don't expect calling |
1629 | to_{fetch,store}_registers. */ | |
f6efe3f8 | 1630 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
1b30aaa5 YQ |
1631 | { |
1632 | if (register_size (gdbarch, regnum) == 0) | |
1633 | continue; | |
1634 | ||
b926417a | 1635 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
1b30aaa5 | 1636 | |
b926417a TT |
1637 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, |
1638 | inner_buf.data ())); | |
1b30aaa5 | 1639 | |
236ef034 PA |
1640 | SELF_CHECK (mockctx.mock_target.fetch_registers_called == 0); |
1641 | SELF_CHECK (mockctx.mock_target.store_registers_called == 0); | |
1642 | SELF_CHECK (mockctx.mock_target.xfer_partial_called == 0); | |
1b30aaa5 | 1643 | |
236ef034 | 1644 | mockctx.mock_target.reset (); |
1b30aaa5 | 1645 | } |
a63f2d2f | 1646 | |
215c69dc | 1647 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1648 | |
1649 | /* GDB may go to target layer to fetch all registers and memory for | |
1650 | readonly regcache. */ | |
236ef034 | 1651 | mockctx.mock_target.reset (); |
a63f2d2f | 1652 | |
f6efe3f8 | 1653 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
a63f2d2f | 1654 | { |
a63f2d2f YQ |
1655 | if (register_size (gdbarch, regnum) == 0) |
1656 | continue; | |
1657 | ||
b926417a | 1658 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
a63f2d2f | 1659 | enum register_status status = readonly.cooked_read (regnum, |
b926417a | 1660 | inner_buf.data ()); |
a63f2d2f YQ |
1661 | |
1662 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1663 | { | |
1664 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1665 | ||
1666 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1667 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1668 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1669 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1670 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1671 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 | 1672 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
bea556ab | 1673 | || bfd_arch == bfd_arch_riscv || bfd_arch == bfd_arch_csky) |
a63f2d2f YQ |
1674 | { |
1675 | /* Raw registers. If raw registers are not in save_reggroup, | |
1676 | their status are unknown. */ | |
1677 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1678 | SELF_CHECK (status == REG_VALID); | |
1679 | else | |
1680 | SELF_CHECK (status == REG_UNKNOWN); | |
1681 | } | |
1682 | else | |
1683 | SELF_CHECK (status == REG_VALID); | |
1684 | } | |
1685 | else | |
1686 | { | |
1687 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1688 | SELF_CHECK (status == REG_VALID); | |
1689 | else | |
1690 | { | |
1691 | /* If pseudo registers are not in save_reggroup, some of | |
1692 | them can be computed from saved raw registers, but some | |
1693 | of them are unknown. */ | |
1694 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1695 | ||
1696 | if (bfd_arch == bfd_arch_frv | |
1697 | || bfd_arch == bfd_arch_m32c | |
1698 | || bfd_arch == bfd_arch_mep | |
1699 | || bfd_arch == bfd_arch_sh) | |
1700 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1701 | else if (bfd_arch == bfd_arch_mips | |
1702 | || bfd_arch == bfd_arch_h8300) | |
1703 | SELF_CHECK (status == REG_UNKNOWN); | |
1704 | else | |
1705 | SELF_CHECK (status == REG_VALID); | |
1706 | } | |
1707 | } | |
1708 | ||
236ef034 PA |
1709 | SELF_CHECK (mockctx.mock_target.fetch_registers_called == 0); |
1710 | SELF_CHECK (mockctx.mock_target.store_registers_called == 0); | |
1711 | SELF_CHECK (mockctx.mock_target.xfer_partial_called == 0); | |
a63f2d2f | 1712 | |
236ef034 | 1713 | mockctx.mock_target.reset (); |
a63f2d2f | 1714 | } |
1b30aaa5 YQ |
1715 | } |
1716 | ||
ec7a5fcb YQ |
1717 | /* Test regcache::cooked_write by writing some expected contents to |
1718 | registers, and checking that contents read from registers and the | |
1719 | expected contents are the same. */ | |
1720 | ||
1721 | static void | |
1722 | cooked_write_test (struct gdbarch *gdbarch) | |
1723 | { | |
1724 | /* Error out if debugging something, because we're going to push the | |
1725 | test target, which would pop any existing target. */ | |
66b4deae | 1726 | if (current_top_target ()->stratum () >= process_stratum) |
ec7a5fcb YQ |
1727 | error (_("target already pushed")); |
1728 | ||
1729 | /* Create a mock environment. A process_stratum target pushed. */ | |
1730 | ||
1731 | target_ops_no_register mock_target; | |
1732 | ||
1733 | /* Push the process_stratum target so we can mock accessing | |
1734 | registers. */ | |
1735 | push_target (&mock_target); | |
1736 | ||
1737 | /* Pop it again on exit (return/exception). */ | |
1738 | struct on_exit | |
1739 | { | |
1740 | ~on_exit () | |
1741 | { | |
1742 | pop_all_targets_at_and_above (process_stratum); | |
1743 | } | |
1744 | } pop_targets; | |
1745 | ||
5b6d1e4f | 1746 | readwrite_regcache readwrite (&mock_target, gdbarch); |
ec7a5fcb | 1747 | |
f6efe3f8 | 1748 | const int num_regs = gdbarch_num_cooked_regs (gdbarch); |
ec7a5fcb YQ |
1749 | |
1750 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1751 | { | |
1752 | if (register_size (gdbarch, regnum) == 0 | |
1753 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1754 | continue; | |
1755 | ||
1756 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1757 | ||
abf516c6 UW |
1758 | if (bfd_arch == bfd_arch_sparc |
1759 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1760 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1761 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1762 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1763 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1764 | continue; |
1765 | ||
1766 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1767 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1768 | const auto type = register_type (gdbarch, regnum); | |
1769 | ||
78134374 SM |
1770 | if (type->code () == TYPE_CODE_FLT |
1771 | || type->code () == TYPE_CODE_DECFLOAT) | |
ec7a5fcb YQ |
1772 | { |
1773 | /* Generate valid float format. */ | |
1774 | target_float_from_string (expected.data (), type, "1.25"); | |
1775 | } | |
78134374 SM |
1776 | else if (type->code () == TYPE_CODE_INT |
1777 | || type->code () == TYPE_CODE_ARRAY | |
1778 | || type->code () == TYPE_CODE_PTR | |
1779 | || type->code () == TYPE_CODE_UNION | |
1780 | || type->code () == TYPE_CODE_STRUCT) | |
ec7a5fcb YQ |
1781 | { |
1782 | if (bfd_arch == bfd_arch_ia64 | |
1783 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1784 | && (bfd_arch == bfd_arch_xtensa | |
1785 | || bfd_arch == bfd_arch_bfin | |
1786 | || bfd_arch == bfd_arch_m32c | |
1787 | /* m68hc11 pseudo registers are in memory. */ | |
1788 | || bfd_arch == bfd_arch_m68hc11 | |
1789 | || bfd_arch == bfd_arch_m68hc12 | |
1790 | || bfd_arch == bfd_arch_s390)) | |
1791 | || (bfd_arch == bfd_arch_frv | |
1792 | /* FRV pseudo registers except iacc0. */ | |
1793 | && regnum > gdbarch_num_regs (gdbarch))) | |
1794 | { | |
1795 | /* Skip setting the expected values for some architecture | |
1796 | registers. */ | |
1797 | } | |
1798 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1799 | { | |
1800 | /* RL78_PC_REGNUM */ | |
1801 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1802 | expected[j] = j; | |
1803 | } | |
1804 | else | |
1805 | { | |
1806 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1807 | expected[j] = j; | |
1808 | } | |
1809 | } | |
78134374 | 1810 | else if (type->code () == TYPE_CODE_FLAGS) |
ec7a5fcb YQ |
1811 | { |
1812 | /* No idea how to test flags. */ | |
1813 | continue; | |
1814 | } | |
1815 | else | |
1816 | { | |
1817 | /* If we don't know how to create the expected value for the | |
1818 | this type, make it fail. */ | |
1819 | SELF_CHECK (0); | |
1820 | } | |
1821 | ||
1822 | readwrite.cooked_write (regnum, expected.data ()); | |
1823 | ||
1824 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1825 | SELF_CHECK (expected == buf); | |
1826 | } | |
1827 | } | |
1828 | ||
8248946c YQ |
1829 | } // namespace selftests |
1830 | #endif /* GDB_SELF_TEST */ | |
1831 | ||
6c265988 | 1832 | void _initialize_regcache (); |
32178cab | 1833 | void |
6c265988 | 1834 | _initialize_regcache () |
32178cab | 1835 | { |
3e43a32a MS |
1836 | regcache_descr_handle |
1837 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1838 | |
76727919 TT |
1839 | gdb::observers::target_changed.attach (regcache_observer_target_changed); |
1840 | gdb::observers::thread_ptid_changed.attach | |
1841 | (regcache::regcache_thread_ptid_changed); | |
f4c5303c | 1842 | |
705152c5 | 1843 | add_com ("flushregs", class_maintenance, reg_flush_command, |
590042fc | 1844 | _("Force gdb to flush its register cache (maintainer command).")); |
39f77062 | 1845 | |
8248946c | 1846 | #if GDB_SELF_TEST |
174981ae | 1847 | selftests::register_test ("regcaches", selftests::regcaches_test); |
1b30aaa5 YQ |
1848 | |
1849 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1850 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1851 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1852 | selftests::cooked_write_test); | |
8248946c | 1853 | #endif |
32178cab | 1854 | } |