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. */ | |
e521e87e | 322 | std::forward_list<regcache *> regcache::current_regcache; |
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 | ||
e521e87e | 331 | for (const auto ®cache : regcache::current_regcache) |
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 | |
e521e87e | 339 | regcache::current_regcache.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 | { |
e521e87e | 420 | for (auto ®cache : regcache::current_regcache) |
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 | { |
e521e87e | 441 | for (auto oit = regcache::current_regcache.before_begin (), |
94bb8dfe | 442 | it = std::next (oit); |
e521e87e | 443 | it != regcache::current_regcache.end (); |
94bb8dfe | 444 | ) |
c2250ad1 | 445 | { |
5b6d1e4f PA |
446 | struct regcache *regcache = *it; |
447 | if ((target == nullptr || regcache->target () == target) | |
448 | && regcache->ptid ().matches (ptid)) | |
e66408ed | 449 | { |
5b6d1e4f | 450 | delete regcache; |
e521e87e | 451 | it = regcache::current_regcache.erase_after (oit); |
e66408ed | 452 | } |
94bb8dfe YQ |
453 | else |
454 | oit = it++; | |
c2250ad1 | 455 | } |
32178cab | 456 | |
5b6d1e4f PA |
457 | if ((target == nullptr || current_thread_target == target) |
458 | && current_thread_ptid.matches (ptid)) | |
041274d8 | 459 | { |
5b6d1e4f | 460 | current_thread_target = NULL; |
041274d8 PA |
461 | current_thread_ptid = null_ptid; |
462 | current_thread_arch = NULL; | |
463 | } | |
32178cab | 464 | |
5b6d1e4f PA |
465 | if ((target == nullptr || current_inferior ()->process_target () == target) |
466 | && inferior_ptid.matches (ptid)) | |
041274d8 PA |
467 | { |
468 | /* We just deleted the regcache of the current thread. Need to | |
469 | forget about any frames we have cached, too. */ | |
470 | reinit_frame_cache (); | |
471 | } | |
472 | } | |
c2250ad1 | 473 | |
00431a78 PA |
474 | /* See regcache.h. */ |
475 | ||
476 | void | |
477 | registers_changed_thread (thread_info *thread) | |
478 | { | |
5b6d1e4f | 479 | registers_changed_ptid (thread->inf->process_target (), thread->ptid); |
00431a78 PA |
480 | } |
481 | ||
041274d8 PA |
482 | void |
483 | registers_changed (void) | |
484 | { | |
5b6d1e4f | 485 | registers_changed_ptid (nullptr, minus_one_ptid); |
32178cab MS |
486 | } |
487 | ||
ef79d9a3 YQ |
488 | void |
489 | regcache::raw_update (int regnum) | |
490 | { | |
4e888c28 | 491 | assert_regnum (regnum); |
8e368124 | 492 | |
3fadccb3 AC |
493 | /* Make certain that the register cache is up-to-date with respect |
494 | to the current thread. This switching shouldn't be necessary | |
495 | only there is still only one target side register cache. Sigh! | |
496 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 497 | |
796bb026 | 498 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 499 | { |
ef79d9a3 | 500 | target_fetch_registers (this, regnum); |
788c8b10 PA |
501 | |
502 | /* A number of targets can't access the whole set of raw | |
503 | registers (because the debug API provides no means to get at | |
504 | them). */ | |
ef79d9a3 YQ |
505 | if (m_register_status[regnum] == REG_UNKNOWN) |
506 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 507 | } |
8e368124 AH |
508 | } |
509 | ||
ef79d9a3 | 510 | enum register_status |
849d0ba8 | 511 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
512 | { |
513 | gdb_assert (buf != NULL); | |
ef79d9a3 | 514 | raw_update (regnum); |
05d1431c | 515 | |
ef79d9a3 YQ |
516 | if (m_register_status[regnum] != REG_VALID) |
517 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 518 | else |
ef79d9a3 YQ |
519 | memcpy (buf, register_buffer (regnum), |
520 | m_descr->sizeof_register[regnum]); | |
05d1431c | 521 | |
aac0d564 | 522 | return m_register_status[regnum]; |
61a0eb5b AC |
523 | } |
524 | ||
05d1431c | 525 | enum register_status |
28fc6740 | 526 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
527 | { |
528 | gdb_assert (regcache != NULL); | |
6f98355c | 529 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
530 | } |
531 | ||
6f98355c | 532 | template<typename T, typename> |
ef79d9a3 | 533 | enum register_status |
849d0ba8 | 534 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 535 | { |
2d522557 | 536 | gdb_byte *buf; |
05d1431c | 537 | enum register_status status; |
123f5f96 | 538 | |
4e888c28 | 539 | assert_regnum (regnum); |
ef79d9a3 YQ |
540 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
541 | status = raw_read (regnum, buf); | |
05d1431c | 542 | if (status == REG_VALID) |
6f98355c YQ |
543 | *val = extract_integer<T> (buf, |
544 | m_descr->sizeof_register[regnum], | |
545 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
546 | else |
547 | *val = 0; | |
548 | return status; | |
28fc6740 AC |
549 | } |
550 | ||
05d1431c | 551 | enum register_status |
28fc6740 AC |
552 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
553 | ULONGEST *val) | |
ef79d9a3 YQ |
554 | { |
555 | gdb_assert (regcache != NULL); | |
6f98355c | 556 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
557 | } |
558 | ||
c00dcbe9 MK |
559 | void |
560 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
561 | { |
562 | gdb_assert (regcache != NULL); | |
6f98355c | 563 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
564 | } |
565 | ||
6f98355c | 566 | template<typename T, typename> |
ef79d9a3 | 567 | void |
6f98355c | 568 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 569 | { |
7c543f7b | 570 | gdb_byte *buf; |
123f5f96 | 571 | |
4e888c28 | 572 | assert_regnum (regnum); |
ef79d9a3 | 573 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
574 | store_integer (buf, m_descr->sizeof_register[regnum], |
575 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 576 | raw_write (regnum, buf); |
c00dcbe9 MK |
577 | } |
578 | ||
579 | void | |
580 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
581 | ULONGEST val) | |
ef79d9a3 YQ |
582 | { |
583 | gdb_assert (regcache != NULL); | |
6f98355c | 584 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
585 | } |
586 | ||
9fd15b2e YQ |
587 | LONGEST |
588 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
589 | { | |
590 | LONGEST value; | |
591 | enum register_status status; | |
592 | ||
593 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
594 | if (status == REG_UNAVAILABLE) | |
595 | throw_error (NOT_AVAILABLE_ERROR, | |
596 | _("Register %d is not available"), regnum); | |
597 | return value; | |
598 | } | |
599 | ||
ef79d9a3 | 600 | enum register_status |
849d0ba8 | 601 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 602 | { |
d138e37a | 603 | gdb_assert (regnum >= 0); |
ef79d9a3 | 604 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 605 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 606 | return raw_read (regnum, buf); |
849d0ba8 | 607 | else if (m_has_pseudo |
ef79d9a3 | 608 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 609 | { |
ef79d9a3 YQ |
610 | if (m_register_status[regnum] == REG_VALID) |
611 | memcpy (buf, register_buffer (regnum), | |
612 | m_descr->sizeof_register[regnum]); | |
05d1431c | 613 | else |
ef79d9a3 | 614 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 615 | |
aac0d564 | 616 | return m_register_status[regnum]; |
05d1431c | 617 | } |
ef79d9a3 | 618 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
619 | { |
620 | struct value *mark, *computed; | |
621 | enum register_status result = REG_VALID; | |
622 | ||
623 | mark = value_mark (); | |
624 | ||
ef79d9a3 YQ |
625 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
626 | this, regnum); | |
3543a589 TT |
627 | if (value_entirely_available (computed)) |
628 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 629 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
630 | else |
631 | { | |
ef79d9a3 | 632 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
633 | result = REG_UNAVAILABLE; |
634 | } | |
635 | ||
636 | value_free_to_mark (mark); | |
637 | ||
638 | return result; | |
639 | } | |
d138e37a | 640 | else |
ef79d9a3 | 641 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 642 | regnum, buf); |
61a0eb5b AC |
643 | } |
644 | ||
ef79d9a3 | 645 | struct value * |
849d0ba8 | 646 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
647 | { |
648 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 649 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 650 | |
d999647b | 651 | if (regnum < num_raw_registers () |
849d0ba8 | 652 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 653 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
654 | { |
655 | struct value *result; | |
656 | ||
ef79d9a3 | 657 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
658 | VALUE_LVAL (result) = lval_register; |
659 | VALUE_REGNUM (result) = regnum; | |
660 | ||
661 | /* It is more efficient in general to do this delegation in this | |
662 | direction than in the other one, even though the value-based | |
663 | API is preferred. */ | |
ef79d9a3 YQ |
664 | if (cooked_read (regnum, |
665 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
666 | mark_value_bytes_unavailable (result, 0, |
667 | TYPE_LENGTH (value_type (result))); | |
668 | ||
669 | return result; | |
670 | } | |
671 | else | |
ef79d9a3 YQ |
672 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
673 | this, regnum); | |
3543a589 TT |
674 | } |
675 | ||
05d1431c | 676 | enum register_status |
a378f419 AC |
677 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
678 | LONGEST *val) | |
ef79d9a3 YQ |
679 | { |
680 | gdb_assert (regcache != NULL); | |
6f98355c | 681 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
682 | } |
683 | ||
6f98355c | 684 | template<typename T, typename> |
ef79d9a3 | 685 | enum register_status |
849d0ba8 | 686 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 687 | { |
05d1431c | 688 | enum register_status status; |
2d522557 | 689 | gdb_byte *buf; |
123f5f96 | 690 | |
ef79d9a3 YQ |
691 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
692 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
693 | status = cooked_read (regnum, buf); | |
05d1431c | 694 | if (status == REG_VALID) |
6f98355c YQ |
695 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
696 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
697 | else |
698 | *val = 0; | |
699 | return status; | |
a378f419 AC |
700 | } |
701 | ||
05d1431c | 702 | enum register_status |
a378f419 AC |
703 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
704 | ULONGEST *val) | |
ef79d9a3 YQ |
705 | { |
706 | gdb_assert (regcache != NULL); | |
6f98355c | 707 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
708 | } |
709 | ||
a66a9c23 AC |
710 | void |
711 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
712 | LONGEST val) | |
ef79d9a3 YQ |
713 | { |
714 | gdb_assert (regcache != NULL); | |
6f98355c | 715 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
716 | } |
717 | ||
6f98355c | 718 | template<typename T, typename> |
ef79d9a3 | 719 | void |
6f98355c | 720 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 721 | { |
7c543f7b | 722 | gdb_byte *buf; |
123f5f96 | 723 | |
ef79d9a3 YQ |
724 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
725 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
726 | store_integer (buf, m_descr->sizeof_register[regnum], |
727 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 728 | cooked_write (regnum, buf); |
a66a9c23 AC |
729 | } |
730 | ||
731 | void | |
732 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
733 | ULONGEST val) | |
ef79d9a3 YQ |
734 | { |
735 | gdb_assert (regcache != NULL); | |
6f98355c | 736 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
737 | } |
738 | ||
ef79d9a3 YQ |
739 | void |
740 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 741 | { |
594f7785 | 742 | |
ef79d9a3 | 743 | gdb_assert (buf != NULL); |
4e888c28 | 744 | assert_regnum (regnum); |
3fadccb3 | 745 | |
3fadccb3 AC |
746 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
747 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 748 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
749 | return; |
750 | ||
3fadccb3 | 751 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 752 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
753 | if (get_register_status (regnum) == REG_VALID |
754 | && (memcmp (register_buffer (regnum), buf, | |
755 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
756 | return; |
757 | ||
ef79d9a3 | 758 | target_prepare_to_store (this); |
c8ec2f33 | 759 | raw_supply (regnum, buf); |
b94ade42 | 760 | |
b292235f TT |
761 | /* Invalidate the register after it is written, in case of a |
762 | failure. */ | |
311dc83a TT |
763 | auto invalidator |
764 | = make_scope_exit ([&] { this->invalidate (regnum); }); | |
b94ade42 | 765 | |
ef79d9a3 | 766 | target_store_registers (this, regnum); |
594f7785 | 767 | |
b292235f TT |
768 | /* The target did not throw an error so we can discard invalidating |
769 | the register. */ | |
770 | invalidator.release (); | |
61a0eb5b AC |
771 | } |
772 | ||
ef79d9a3 YQ |
773 | void |
774 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 775 | { |
d138e37a | 776 | gdb_assert (regnum >= 0); |
ef79d9a3 | 777 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 778 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 779 | raw_write (regnum, buf); |
d138e37a | 780 | else |
ef79d9a3 | 781 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 782 | regnum, buf); |
61a0eb5b AC |
783 | } |
784 | ||
33bab475 | 785 | /* See regcache.h. */ |
06c0b04e | 786 | |
ef79d9a3 | 787 | enum register_status |
33bab475 AH |
788 | readable_regcache::read_part (int regnum, int offset, int len, |
789 | gdb_byte *out, bool is_raw) | |
849d0ba8 | 790 | { |
33bab475 AH |
791 | int reg_size = register_size (arch (), regnum); |
792 | ||
793 | gdb_assert (out != NULL); | |
8e7767e3 AH |
794 | gdb_assert (offset >= 0 && offset <= reg_size); |
795 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
796 | |
797 | if (offset == 0 && len == 0) | |
798 | { | |
799 | /* Nothing to do. */ | |
800 | return REG_VALID; | |
801 | } | |
802 | ||
803 | if (offset == 0 && len == reg_size) | |
804 | { | |
805 | /* Read the full register. */ | |
806 | return (is_raw) ? raw_read (regnum, out) : cooked_read (regnum, out); | |
807 | } | |
849d0ba8 | 808 | |
849d0ba8 | 809 | enum register_status status; |
33bab475 | 810 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); |
849d0ba8 | 811 | |
33bab475 AH |
812 | /* Read full register to buffer. */ |
813 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
849d0ba8 YQ |
814 | if (status != REG_VALID) |
815 | return status; | |
816 | ||
33bab475 AH |
817 | /* Copy out. */ |
818 | memcpy (out, reg + offset, len); | |
849d0ba8 YQ |
819 | return REG_VALID; |
820 | } | |
821 | ||
33bab475 AH |
822 | /* See regcache.h. */ |
823 | ||
8e7767e3 AH |
824 | void |
825 | reg_buffer::raw_collect_part (int regnum, int offset, int len, | |
826 | gdb_byte *out) const | |
827 | { | |
828 | int reg_size = register_size (arch (), regnum); | |
829 | ||
830 | gdb_assert (out != nullptr); | |
831 | gdb_assert (offset >= 0 && offset <= reg_size); | |
832 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
833 | ||
834 | if (offset == 0 && len == 0) | |
835 | { | |
836 | /* Nothing to do. */ | |
837 | return; | |
838 | } | |
839 | ||
840 | if (offset == 0 && len == reg_size) | |
841 | { | |
842 | /* Collect the full register. */ | |
843 | return raw_collect (regnum, out); | |
844 | } | |
845 | ||
846 | /* Read to buffer, then write out. */ | |
847 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
848 | raw_collect (regnum, reg); | |
849 | memcpy (out, reg + offset, len); | |
850 | } | |
851 | ||
852 | /* See regcache.h. */ | |
853 | ||
849d0ba8 YQ |
854 | enum register_status |
855 | regcache::write_part (int regnum, int offset, int len, | |
33bab475 | 856 | const gdb_byte *in, bool is_raw) |
ef79d9a3 | 857 | { |
33bab475 | 858 | int reg_size = register_size (arch (), regnum); |
123f5f96 | 859 | |
33bab475 | 860 | gdb_assert (in != NULL); |
8e7767e3 AH |
861 | gdb_assert (offset >= 0 && offset <= reg_size); |
862 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
863 | |
864 | if (offset == 0 && len == 0) | |
06c0b04e | 865 | { |
33bab475 AH |
866 | /* Nothing to do. */ |
867 | return REG_VALID; | |
868 | } | |
05d1431c | 869 | |
33bab475 AH |
870 | if (offset == 0 && len == reg_size) |
871 | { | |
872 | /* Write the full register. */ | |
873 | (is_raw) ? raw_write (regnum, in) : cooked_write (regnum, in); | |
874 | return REG_VALID; | |
06c0b04e | 875 | } |
849d0ba8 | 876 | |
33bab475 AH |
877 | enum register_status status; |
878 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
05d1431c | 879 | |
33bab475 AH |
880 | /* Read existing register to buffer. */ |
881 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
882 | if (status != REG_VALID) | |
883 | return status; | |
884 | ||
885 | /* Update buffer, then write back to regcache. */ | |
886 | memcpy (reg + offset, in, len); | |
887 | is_raw ? raw_write (regnum, reg) : cooked_write (regnum, reg); | |
05d1431c | 888 | return REG_VALID; |
06c0b04e AC |
889 | } |
890 | ||
33bab475 AH |
891 | /* See regcache.h. */ |
892 | ||
8e7767e3 AH |
893 | void |
894 | reg_buffer::raw_supply_part (int regnum, int offset, int len, | |
895 | const gdb_byte *in) | |
896 | { | |
897 | int reg_size = register_size (arch (), regnum); | |
898 | ||
899 | gdb_assert (in != nullptr); | |
900 | gdb_assert (offset >= 0 && offset <= reg_size); | |
901 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
902 | ||
903 | if (offset == 0 && len == 0) | |
904 | { | |
905 | /* Nothing to do. */ | |
906 | return; | |
907 | } | |
908 | ||
909 | if (offset == 0 && len == reg_size) | |
910 | { | |
911 | /* Supply the full register. */ | |
912 | return raw_supply (regnum, in); | |
913 | } | |
914 | ||
915 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
916 | ||
917 | /* Read existing value to buffer. */ | |
918 | raw_collect (regnum, reg); | |
919 | ||
920 | /* Write to buffer, then write out. */ | |
921 | memcpy (reg + offset, in, len); | |
922 | raw_supply (regnum, reg); | |
923 | } | |
924 | ||
ef79d9a3 | 925 | enum register_status |
33bab475 AH |
926 | readable_regcache::raw_read_part (int regnum, int offset, int len, |
927 | gdb_byte *buf) | |
ef79d9a3 | 928 | { |
4e888c28 | 929 | assert_regnum (regnum); |
849d0ba8 | 930 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
931 | } |
932 | ||
4f0420fd | 933 | /* See regcache.h. */ |
123f5f96 | 934 | |
ef79d9a3 YQ |
935 | void |
936 | regcache::raw_write_part (int regnum, int offset, int len, | |
937 | const gdb_byte *buf) | |
938 | { | |
4e888c28 | 939 | assert_regnum (regnum); |
849d0ba8 | 940 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
941 | } |
942 | ||
33bab475 AH |
943 | /* See regcache.h. */ |
944 | ||
ef79d9a3 | 945 | enum register_status |
849d0ba8 YQ |
946 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
947 | gdb_byte *buf) | |
ef79d9a3 YQ |
948 | { |
949 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 950 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
951 | } |
952 | ||
33bab475 AH |
953 | /* See regcache.h. */ |
954 | ||
ef79d9a3 YQ |
955 | void |
956 | regcache::cooked_write_part (int regnum, int offset, int len, | |
957 | const gdb_byte *buf) | |
958 | { | |
959 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 960 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 961 | } |
32178cab | 962 | |
268a13a5 | 963 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 964 | |
ef79d9a3 | 965 | void |
9c861883 | 966 | reg_buffer::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
967 | { |
968 | void *regbuf; | |
969 | size_t size; | |
970 | ||
4e888c28 | 971 | assert_regnum (regnum); |
9a661b68 | 972 | |
ef79d9a3 YQ |
973 | regbuf = register_buffer (regnum); |
974 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
975 | |
976 | if (buf) | |
ee99023e PA |
977 | { |
978 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 979 | m_register_status[regnum] = REG_VALID; |
ee99023e | 980 | } |
9a661b68 | 981 | else |
ee99023e PA |
982 | { |
983 | /* This memset not strictly necessary, but better than garbage | |
984 | in case the register value manages to escape somewhere (due | |
985 | to a bug, no less). */ | |
986 | memset (regbuf, 0, size); | |
ef79d9a3 | 987 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 988 | } |
9a661b68 MK |
989 | } |
990 | ||
9c861883 | 991 | /* See regcache.h. */ |
b057297a AH |
992 | |
993 | void | |
9c861883 AH |
994 | reg_buffer::raw_supply_integer (int regnum, const gdb_byte *addr, |
995 | int addr_len, bool is_signed) | |
b057297a AH |
996 | { |
997 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
998 | gdb_byte *regbuf; | |
999 | size_t regsize; | |
1000 | ||
4e888c28 | 1001 | assert_regnum (regnum); |
b057297a AH |
1002 | |
1003 | regbuf = register_buffer (regnum); | |
1004 | regsize = m_descr->sizeof_register[regnum]; | |
1005 | ||
1006 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
1007 | byte_order); | |
1008 | m_register_status[regnum] = REG_VALID; | |
1009 | } | |
1010 | ||
9c861883 | 1011 | /* See regcache.h. */ |
f81fdd35 AH |
1012 | |
1013 | void | |
9c861883 | 1014 | reg_buffer::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1015 | { |
1016 | void *regbuf; | |
1017 | size_t size; | |
1018 | ||
4e888c28 | 1019 | assert_regnum (regnum); |
f81fdd35 AH |
1020 | |
1021 | regbuf = register_buffer (regnum); | |
1022 | size = m_descr->sizeof_register[regnum]; | |
1023 | ||
1024 | memset (regbuf, 0, size); | |
1025 | m_register_status[regnum] = REG_VALID; | |
1026 | } | |
1027 | ||
268a13a5 | 1028 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 1029 | |
ef79d9a3 | 1030 | void |
9c861883 | 1031 | reg_buffer::raw_collect (int regnum, void *buf) const |
9a661b68 MK |
1032 | { |
1033 | const void *regbuf; | |
1034 | size_t size; | |
1035 | ||
ef79d9a3 | 1036 | gdb_assert (buf != NULL); |
4e888c28 | 1037 | assert_regnum (regnum); |
9a661b68 | 1038 | |
ef79d9a3 YQ |
1039 | regbuf = register_buffer (regnum); |
1040 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1041 | memcpy (buf, regbuf, size); |
1042 | } | |
1043 | ||
9c861883 | 1044 | /* See regcache.h. */ |
b057297a AH |
1045 | |
1046 | void | |
9c861883 AH |
1047 | reg_buffer::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
1048 | bool is_signed) const | |
b057297a AH |
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 | ||
8e7767e3 AH |
1063 | /* See regcache.h. */ |
1064 | ||
1065 | void | |
1066 | regcache::transfer_regset_register (struct regcache *out_regcache, int regnum, | |
1067 | const gdb_byte *in_buf, gdb_byte *out_buf, | |
1068 | int slot_size, int offs) const | |
1069 | { | |
1070 | struct gdbarch *gdbarch = arch (); | |
1071 | int reg_size = std::min (register_size (gdbarch, regnum), slot_size); | |
1072 | ||
1073 | /* Use part versions and reg_size to prevent possible buffer overflows when | |
1074 | accessing the regcache. */ | |
1075 | ||
1076 | if (out_buf != nullptr) | |
1077 | { | |
1078 | raw_collect_part (regnum, 0, reg_size, out_buf + offs); | |
1079 | ||
1080 | /* Ensure any additional space is cleared. */ | |
1081 | if (slot_size > reg_size) | |
1082 | memset (out_buf + offs + reg_size, 0, slot_size - reg_size); | |
1083 | } | |
1084 | else if (in_buf != nullptr) | |
1085 | out_regcache->raw_supply_part (regnum, 0, reg_size, in_buf + offs); | |
1086 | else | |
1087 | { | |
1088 | /* Invalidate the register. */ | |
1089 | out_regcache->raw_supply (regnum, nullptr); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | /* See regcache.h. */ | |
9c861883 | 1094 | |
ef79d9a3 YQ |
1095 | void |
1096 | regcache::transfer_regset (const struct regset *regset, | |
1097 | struct regcache *out_regcache, | |
8e7767e3 AH |
1098 | int regnum, const gdb_byte *in_buf, |
1099 | gdb_byte *out_buf, size_t size) const | |
0b309272 AA |
1100 | { |
1101 | const struct regcache_map_entry *map; | |
1102 | int offs = 0, count; | |
1103 | ||
19ba03f4 SM |
1104 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1105 | (count = map->count) != 0; | |
1106 | map++) | |
0b309272 AA |
1107 | { |
1108 | int regno = map->regno; | |
1109 | int slot_size = map->size; | |
1110 | ||
1111 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1112 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1113 | |
1114 | if (regno == REGCACHE_MAP_SKIP | |
1115 | || (regnum != -1 | |
1116 | && (regnum < regno || regnum >= regno + count))) | |
1117 | offs += count * slot_size; | |
1118 | ||
1119 | else if (regnum == -1) | |
1120 | for (; count--; regno++, offs += slot_size) | |
1121 | { | |
1122 | if (offs + slot_size > size) | |
1123 | break; | |
1124 | ||
8e7767e3 AH |
1125 | transfer_regset_register (out_regcache, regno, in_buf, out_buf, |
1126 | slot_size, offs); | |
0b309272 AA |
1127 | } |
1128 | else | |
1129 | { | |
1130 | /* Transfer a single register and return. */ | |
1131 | offs += (regnum - regno) * slot_size; | |
1132 | if (offs + slot_size > size) | |
1133 | return; | |
1134 | ||
8e7767e3 AH |
1135 | transfer_regset_register (out_regcache, regnum, in_buf, out_buf, |
1136 | slot_size, offs); | |
0b309272 AA |
1137 | return; |
1138 | } | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1143 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1144 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1145 | ||
1146 | void | |
1147 | regcache_supply_regset (const struct regset *regset, | |
1148 | struct regcache *regcache, | |
1149 | int regnum, const void *buf, size_t size) | |
1150 | { | |
8e7767e3 | 1151 | regcache->supply_regset (regset, regnum, (const gdb_byte *) buf, size); |
ef79d9a3 YQ |
1152 | } |
1153 | ||
1154 | void | |
1155 | regcache::supply_regset (const struct regset *regset, | |
1156 | int regnum, const void *buf, size_t size) | |
1157 | { | |
8e7767e3 | 1158 | transfer_regset (regset, this, regnum, (const gdb_byte *) buf, nullptr, size); |
0b309272 AA |
1159 | } |
1160 | ||
1161 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1162 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1163 | REGSET. */ | |
1164 | ||
1165 | void | |
1166 | regcache_collect_regset (const struct regset *regset, | |
1167 | const struct regcache *regcache, | |
1168 | int regnum, void *buf, size_t size) | |
1169 | { | |
8e7767e3 | 1170 | regcache->collect_regset (regset, regnum, (gdb_byte *) buf, size); |
ef79d9a3 YQ |
1171 | } |
1172 | ||
1173 | void | |
1174 | regcache::collect_regset (const struct regset *regset, | |
1175 | int regnum, void *buf, size_t size) const | |
1176 | { | |
8e7767e3 | 1177 | transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size); |
0b309272 AA |
1178 | } |
1179 | ||
268a13a5 | 1180 | /* See gdbsupport/common-regcache.h. */ |
f868386e AH |
1181 | |
1182 | bool | |
1183 | reg_buffer::raw_compare (int regnum, const void *buf, int offset) const | |
1184 | { | |
1185 | gdb_assert (buf != NULL); | |
1186 | assert_regnum (regnum); | |
1187 | ||
1188 | const char *regbuf = (const char *) register_buffer (regnum); | |
1189 | size_t size = m_descr->sizeof_register[regnum]; | |
1190 | gdb_assert (size >= offset); | |
1191 | ||
1192 | return (memcmp (buf, regbuf + offset, size - offset) == 0); | |
1193 | } | |
193cb69f | 1194 | |
515630c5 | 1195 | /* Special handling for register PC. */ |
32178cab MS |
1196 | |
1197 | CORE_ADDR | |
515630c5 | 1198 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1199 | { |
ac7936df | 1200 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1201 | |
32178cab MS |
1202 | CORE_ADDR pc_val; |
1203 | ||
61a1198a UW |
1204 | if (gdbarch_read_pc_p (gdbarch)) |
1205 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1206 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1207 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1208 | { |
61a1198a | 1209 | ULONGEST raw_val; |
123f5f96 | 1210 | |
05d1431c PA |
1211 | if (regcache_cooked_read_unsigned (regcache, |
1212 | gdbarch_pc_regnum (gdbarch), | |
1213 | &raw_val) == REG_UNAVAILABLE) | |
1214 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1215 | ||
214e098a | 1216 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1217 | } |
1218 | else | |
515630c5 UW |
1219 | internal_error (__FILE__, __LINE__, |
1220 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1221 | return pc_val; |
1222 | } | |
1223 | ||
fc75c28b TBA |
1224 | /* See gdbsupport/common-regcache.h. */ |
1225 | ||
1226 | CORE_ADDR | |
1227 | regcache_read_pc_protected (regcache *regcache) | |
1228 | { | |
1229 | CORE_ADDR pc; | |
1230 | try | |
1231 | { | |
1232 | pc = regcache_read_pc (regcache); | |
1233 | } | |
1234 | catch (const gdb_exception_error &ex) | |
1235 | { | |
1236 | pc = 0; | |
1237 | } | |
1238 | ||
1239 | return pc; | |
1240 | } | |
1241 | ||
32178cab | 1242 | void |
515630c5 | 1243 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1244 | { |
ac7936df | 1245 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1246 | |
61a1198a UW |
1247 | if (gdbarch_write_pc_p (gdbarch)) |
1248 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1249 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1250 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1251 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1252 | else |
1253 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1254 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1255 | |
1256 | /* Writing the PC (for instance, from "load") invalidates the | |
1257 | current frame. */ | |
1258 | reinit_frame_cache (); | |
32178cab MS |
1259 | } |
1260 | ||
d999647b | 1261 | int |
31716595 | 1262 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1263 | { |
1264 | return gdbarch_num_regs (arch ()); | |
1265 | } | |
1266 | ||
ed771251 | 1267 | void |
ef79d9a3 | 1268 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1269 | { |
ef79d9a3 | 1270 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1271 | |
1272 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1273 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1274 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1275 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1276 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1277 | gdbarch_register_name (gdbarch, regno)); | |
1278 | else | |
1279 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1280 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1281 | { | |
1282 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1283 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1284 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1285 | |
1286 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1287 | for (int i = 0; i < size; i++) | |
1288 | { | |
1289 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1290 | } | |
1291 | if (size <= sizeof (LONGEST)) | |
1292 | { | |
1293 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1294 | ||
1295 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1296 | core_addr_to_string_nz (val), plongest (val)); | |
1297 | } | |
1298 | } | |
1299 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1300 | } | |
32178cab | 1301 | |
705152c5 | 1302 | static void |
0b39b52e | 1303 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1304 | { |
1305 | /* Force-flush the register cache. */ | |
1306 | registers_changed (); | |
1307 | if (from_tty) | |
a3f17187 | 1308 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1309 | } |
1310 | ||
4c74fe6b YQ |
1311 | void |
1312 | register_dump::dump (ui_file *file) | |
af030b9a | 1313 | { |
4c74fe6b YQ |
1314 | auto descr = regcache_descr (m_gdbarch); |
1315 | int regnum; | |
1316 | int footnote_nr = 0; | |
1317 | int footnote_register_offset = 0; | |
1318 | int footnote_register_type_name_null = 0; | |
1319 | long register_offset = 0; | |
af030b9a | 1320 | |
4c74fe6b | 1321 | gdb_assert (descr->nr_cooked_registers |
f6efe3f8 | 1322 | == gdbarch_num_cooked_regs (m_gdbarch)); |
af030b9a | 1323 | |
4c74fe6b YQ |
1324 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1325 | { | |
1326 | /* Name. */ | |
1327 | if (regnum < 0) | |
1328 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1329 | else | |
1330 | { | |
1331 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1332 | |
4c74fe6b YQ |
1333 | if (p == NULL) |
1334 | p = ""; | |
1335 | else if (p[0] == '\0') | |
1336 | p = "''"; | |
1337 | fprintf_unfiltered (file, " %-10s", p); | |
1338 | } | |
af030b9a | 1339 | |
4c74fe6b YQ |
1340 | /* Number. */ |
1341 | if (regnum < 0) | |
1342 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1343 | else | |
1344 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1345 | |
4c74fe6b YQ |
1346 | /* Relative number. */ |
1347 | if (regnum < 0) | |
1348 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1349 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1350 | fprintf_unfiltered (file, " %4d", regnum); | |
1351 | else | |
1352 | fprintf_unfiltered (file, " %4d", | |
1353 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1354 | |
4c74fe6b YQ |
1355 | /* Offset. */ |
1356 | if (regnum < 0) | |
1357 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1358 | else | |
af030b9a | 1359 | { |
4c74fe6b YQ |
1360 | fprintf_unfiltered (file, " %6ld", |
1361 | descr->register_offset[regnum]); | |
1362 | if (register_offset != descr->register_offset[regnum] | |
1363 | || (regnum > 0 | |
1364 | && (descr->register_offset[regnum] | |
1365 | != (descr->register_offset[regnum - 1] | |
1366 | + descr->sizeof_register[regnum - 1]))) | |
1367 | ) | |
af030b9a | 1368 | { |
4c74fe6b YQ |
1369 | if (!footnote_register_offset) |
1370 | footnote_register_offset = ++footnote_nr; | |
1371 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1372 | } |
4c74fe6b YQ |
1373 | else |
1374 | fprintf_unfiltered (file, " "); | |
1375 | register_offset = (descr->register_offset[regnum] | |
1376 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1377 | } |
1378 | ||
4c74fe6b YQ |
1379 | /* Size. */ |
1380 | if (regnum < 0) | |
1381 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1382 | else | |
1383 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1384 | |
4c74fe6b | 1385 | /* Type. */ |
f3384e66 | 1386 | { |
4c74fe6b YQ |
1387 | const char *t; |
1388 | std::string name_holder; | |
b59ff9d5 | 1389 | |
4c74fe6b YQ |
1390 | if (regnum < 0) |
1391 | t = "Type"; | |
215c69dc YQ |
1392 | else |
1393 | { | |
4c74fe6b | 1394 | static const char blt[] = "builtin_type"; |
123f5f96 | 1395 | |
7d93a1e0 | 1396 | t = register_type (m_gdbarch, regnum)->name (); |
4c74fe6b | 1397 | if (t == NULL) |
f3384e66 | 1398 | { |
4c74fe6b YQ |
1399 | if (!footnote_register_type_name_null) |
1400 | footnote_register_type_name_null = ++footnote_nr; | |
1401 | name_holder = string_printf ("*%d", | |
1402 | footnote_register_type_name_null); | |
1403 | t = name_holder.c_str (); | |
f3384e66 | 1404 | } |
4c74fe6b YQ |
1405 | /* Chop a leading builtin_type. */ |
1406 | if (startswith (t, blt)) | |
1407 | t += strlen (blt); | |
f3384e66 | 1408 | } |
4c74fe6b | 1409 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1410 | } |
f3384e66 | 1411 | |
4c74fe6b YQ |
1412 | /* Leading space always present. */ |
1413 | fprintf_unfiltered (file, " "); | |
af030b9a | 1414 | |
4c74fe6b | 1415 | dump_reg (file, regnum); |
ed4227b7 | 1416 | |
4c74fe6b | 1417 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1418 | } |
1419 | ||
4c74fe6b YQ |
1420 | if (footnote_register_offset) |
1421 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1422 | footnote_register_offset); | |
1423 | if (footnote_register_type_name_null) | |
1424 | fprintf_unfiltered (file, | |
1425 | "*%d: Register type's name NULL.\n", | |
1426 | footnote_register_type_name_null); | |
c21236dc PA |
1427 | } |
1428 | ||
8248946c | 1429 | #if GDB_SELF_TEST |
268a13a5 | 1430 | #include "gdbsupport/selftest.h" |
1b30aaa5 | 1431 | #include "selftest-arch.h" |
ec7a5fcb | 1432 | #include "target-float.h" |
8248946c YQ |
1433 | |
1434 | namespace selftests { | |
1435 | ||
e521e87e | 1436 | class regcache_access : public regcache |
8248946c | 1437 | { |
e521e87e YQ |
1438 | public: |
1439 | ||
1440 | /* Return the number of elements in current_regcache. */ | |
1441 | ||
1442 | static size_t | |
1443 | current_regcache_size () | |
1444 | { | |
1445 | return std::distance (regcache::current_regcache.begin (), | |
1446 | regcache::current_regcache.end ()); | |
1447 | } | |
1448 | }; | |
8248946c | 1449 | |
5b6d1e4f PA |
1450 | /* Wrapper around get_thread_arch_aspace_regcache that does some self checks. */ |
1451 | ||
1452 | static void | |
1453 | test_get_thread_arch_aspace_regcache (process_stratum_target *target, | |
1454 | ptid_t ptid, struct gdbarch *gdbarch, | |
1455 | address_space *aspace) | |
1456 | { | |
1457 | struct regcache *regcache | |
1458 | = get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace); | |
1459 | SELF_CHECK (regcache != NULL); | |
1460 | SELF_CHECK (regcache->target () == target); | |
1461 | SELF_CHECK (regcache->ptid () == ptid); | |
1462 | SELF_CHECK (regcache->aspace () == aspace); | |
1463 | } | |
1464 | ||
8248946c YQ |
1465 | static void |
1466 | current_regcache_test (void) | |
1467 | { | |
1468 | /* It is empty at the start. */ | |
e521e87e | 1469 | SELF_CHECK (regcache_access::current_regcache_size () == 0); |
8248946c YQ |
1470 | |
1471 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1472 | ||
5b6d1e4f PA |
1473 | test_target_ops test_target1; |
1474 | test_target_ops test_target2; | |
8248946c | 1475 | |
5b6d1e4f PA |
1476 | /* Get regcache from (target1,ptid1), a new regcache is added to |
1477 | current_regcache. */ | |
1478 | test_get_thread_arch_aspace_regcache (&test_target1, ptid1, | |
1479 | target_gdbarch (), | |
1480 | NULL); | |
e521e87e | 1481 | SELF_CHECK (regcache_access::current_regcache_size () == 1); |
8248946c | 1482 | |
5b6d1e4f | 1483 | /* Get regcache from (target1,ptid2), a new regcache is added to |
8248946c | 1484 | current_regcache. */ |
5b6d1e4f PA |
1485 | test_get_thread_arch_aspace_regcache (&test_target1, ptid2, |
1486 | target_gdbarch (), | |
1487 | NULL); | |
e521e87e | 1488 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c | 1489 | |
5b6d1e4f | 1490 | /* Get regcache from (target1,ptid3), a new regcache is added to |
8248946c | 1491 | current_regcache. */ |
5b6d1e4f PA |
1492 | test_get_thread_arch_aspace_regcache (&test_target1, ptid3, |
1493 | target_gdbarch (), | |
1494 | NULL); | |
e521e87e | 1495 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c | 1496 | |
5b6d1e4f | 1497 | /* Get regcache from (target1,ptid2) again, nothing is added to |
8248946c | 1498 | current_regcache. */ |
5b6d1e4f PA |
1499 | test_get_thread_arch_aspace_regcache (&test_target1, ptid2, |
1500 | target_gdbarch (), | |
1501 | NULL); | |
e521e87e | 1502 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c | 1503 | |
5b6d1e4f PA |
1504 | /* Get regcache from (target2,ptid2), a new regcache is added to |
1505 | current_regcache, since this time we're using a differen | |
1506 | target. */ | |
1507 | test_get_thread_arch_aspace_regcache (&test_target2, ptid2, | |
1508 | target_gdbarch (), | |
1509 | NULL); | |
1510 | SELF_CHECK (regcache_access::current_regcache_size () == 4); | |
1511 | ||
1512 | /* Mark that (target1,ptid2) changed. The regcache of (target1, | |
1513 | ptid2) should be removed from current_regcache. */ | |
1514 | registers_changed_ptid (&test_target1, ptid2); | |
1515 | SELF_CHECK (regcache_access::current_regcache_size () == 3); | |
1516 | ||
1517 | /* Get the regcache from (target2,ptid2) again, confirming the | |
1518 | registers_changed_ptid call above did not delete it. */ | |
1519 | test_get_thread_arch_aspace_regcache (&test_target2, ptid2, | |
1520 | target_gdbarch (), | |
1521 | NULL); | |
1522 | SELF_CHECK (regcache_access::current_regcache_size () == 3); | |
1523 | ||
1524 | /* Confirm that marking all regcaches of all targets as changed | |
1525 | clears current_regcache. */ | |
1526 | registers_changed_ptid (nullptr, minus_one_ptid); | |
1527 | SELF_CHECK (regcache_access::current_regcache_size () == 0); | |
8248946c YQ |
1528 | } |
1529 | ||
1b30aaa5 YQ |
1530 | class target_ops_no_register : public test_target_ops |
1531 | { | |
1532 | public: | |
1533 | target_ops_no_register () | |
1534 | : test_target_ops {} | |
f6ac5f3d | 1535 | {} |
1b30aaa5 YQ |
1536 | |
1537 | void reset () | |
1538 | { | |
1539 | fetch_registers_called = 0; | |
1540 | store_registers_called = 0; | |
1541 | xfer_partial_called = 0; | |
1542 | } | |
1543 | ||
f6ac5f3d PA |
1544 | void fetch_registers (regcache *regs, int regno) override; |
1545 | void store_registers (regcache *regs, int regno) override; | |
1546 | ||
1547 | enum target_xfer_status xfer_partial (enum target_object object, | |
1548 | const char *annex, gdb_byte *readbuf, | |
1549 | const gdb_byte *writebuf, | |
1550 | ULONGEST offset, ULONGEST len, | |
1551 | ULONGEST *xfered_len) override; | |
1552 | ||
1b30aaa5 YQ |
1553 | unsigned int fetch_registers_called = 0; |
1554 | unsigned int store_registers_called = 0; | |
1555 | unsigned int xfer_partial_called = 0; | |
1556 | }; | |
1557 | ||
f6ac5f3d PA |
1558 | void |
1559 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1560 | { |
1b30aaa5 YQ |
1561 | /* Mark register available. */ |
1562 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1563 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1564 | } |
1565 | ||
f6ac5f3d PA |
1566 | void |
1567 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1568 | { |
f6ac5f3d | 1569 | this->store_registers_called++; |
1b30aaa5 YQ |
1570 | } |
1571 | ||
f6ac5f3d PA |
1572 | enum target_xfer_status |
1573 | target_ops_no_register::xfer_partial (enum target_object object, | |
1574 | const char *annex, gdb_byte *readbuf, | |
1575 | const gdb_byte *writebuf, | |
1576 | ULONGEST offset, ULONGEST len, | |
1577 | ULONGEST *xfered_len) | |
1b30aaa5 | 1578 | { |
f6ac5f3d | 1579 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1580 | |
1581 | *xfered_len = len; | |
1582 | return TARGET_XFER_OK; | |
1583 | } | |
1584 | ||
1585 | class readwrite_regcache : public regcache | |
1586 | { | |
1587 | public: | |
5b6d1e4f PA |
1588 | readwrite_regcache (process_stratum_target *target, |
1589 | struct gdbarch *gdbarch) | |
1590 | : regcache (target, gdbarch, nullptr) | |
1b30aaa5 YQ |
1591 | {} |
1592 | }; | |
1593 | ||
1594 | /* Test regcache::cooked_read gets registers from raw registers and | |
1595 | memory instead of target to_{fetch,store}_registers. */ | |
1596 | ||
1597 | static void | |
1598 | cooked_read_test (struct gdbarch *gdbarch) | |
1599 | { | |
236ef034 | 1600 | scoped_mock_context<target_ops_no_register> mockctx (gdbarch); |
1b30aaa5 YQ |
1601 | |
1602 | /* Test that read one raw register from regcache_no_target will go | |
1603 | to the target layer. */ | |
1b30aaa5 YQ |
1604 | |
1605 | /* Find a raw register which size isn't zero. */ | |
b926417a TT |
1606 | int nonzero_regnum; |
1607 | for (nonzero_regnum = 0; | |
1608 | nonzero_regnum < gdbarch_num_regs (gdbarch); | |
1609 | nonzero_regnum++) | |
1b30aaa5 | 1610 | { |
b926417a | 1611 | if (register_size (gdbarch, nonzero_regnum) != 0) |
1b30aaa5 YQ |
1612 | break; |
1613 | } | |
1614 | ||
236ef034 | 1615 | readwrite_regcache readwrite (&mockctx.mock_target, gdbarch); |
b926417a | 1616 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, nonzero_regnum)); |
1b30aaa5 | 1617 | |
b926417a | 1618 | readwrite.raw_read (nonzero_regnum, buf.data ()); |
1b30aaa5 YQ |
1619 | |
1620 | /* raw_read calls target_fetch_registers. */ | |
236ef034 PA |
1621 | SELF_CHECK (mockctx.mock_target.fetch_registers_called > 0); |
1622 | mockctx.mock_target.reset (); | |
1b30aaa5 YQ |
1623 | |
1624 | /* Mark all raw registers valid, so the following raw registers | |
1625 | accesses won't go to target. */ | |
1626 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1627 | readwrite.raw_update (i); | |
1628 | ||
236ef034 | 1629 | mockctx.mock_target.reset (); |
1b30aaa5 YQ |
1630 | /* Then, read all raw and pseudo registers, and don't expect calling |
1631 | to_{fetch,store}_registers. */ | |
f6efe3f8 | 1632 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
1b30aaa5 YQ |
1633 | { |
1634 | if (register_size (gdbarch, regnum) == 0) | |
1635 | continue; | |
1636 | ||
b926417a | 1637 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
1b30aaa5 | 1638 | |
b926417a TT |
1639 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, |
1640 | inner_buf.data ())); | |
1b30aaa5 | 1641 | |
236ef034 PA |
1642 | SELF_CHECK (mockctx.mock_target.fetch_registers_called == 0); |
1643 | SELF_CHECK (mockctx.mock_target.store_registers_called == 0); | |
1644 | SELF_CHECK (mockctx.mock_target.xfer_partial_called == 0); | |
1b30aaa5 | 1645 | |
236ef034 | 1646 | mockctx.mock_target.reset (); |
1b30aaa5 | 1647 | } |
a63f2d2f | 1648 | |
215c69dc | 1649 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1650 | |
1651 | /* GDB may go to target layer to fetch all registers and memory for | |
1652 | readonly regcache. */ | |
236ef034 | 1653 | mockctx.mock_target.reset (); |
a63f2d2f | 1654 | |
f6efe3f8 | 1655 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
a63f2d2f | 1656 | { |
a63f2d2f YQ |
1657 | if (register_size (gdbarch, regnum) == 0) |
1658 | continue; | |
1659 | ||
b926417a | 1660 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
a63f2d2f | 1661 | enum register_status status = readonly.cooked_read (regnum, |
b926417a | 1662 | inner_buf.data ()); |
a63f2d2f YQ |
1663 | |
1664 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1665 | { | |
1666 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1667 | ||
1668 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1669 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1670 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1671 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1672 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1673 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 | 1674 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
bea556ab | 1675 | || bfd_arch == bfd_arch_riscv || bfd_arch == bfd_arch_csky) |
a63f2d2f YQ |
1676 | { |
1677 | /* Raw registers. If raw registers are not in save_reggroup, | |
1678 | their status are unknown. */ | |
1679 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1680 | SELF_CHECK (status == REG_VALID); | |
1681 | else | |
1682 | SELF_CHECK (status == REG_UNKNOWN); | |
1683 | } | |
1684 | else | |
1685 | SELF_CHECK (status == REG_VALID); | |
1686 | } | |
1687 | else | |
1688 | { | |
1689 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1690 | SELF_CHECK (status == REG_VALID); | |
1691 | else | |
1692 | { | |
1693 | /* If pseudo registers are not in save_reggroup, some of | |
1694 | them can be computed from saved raw registers, but some | |
1695 | of them are unknown. */ | |
1696 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1697 | ||
1698 | if (bfd_arch == bfd_arch_frv | |
1699 | || bfd_arch == bfd_arch_m32c | |
1700 | || bfd_arch == bfd_arch_mep | |
1701 | || bfd_arch == bfd_arch_sh) | |
1702 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1703 | else if (bfd_arch == bfd_arch_mips | |
1704 | || bfd_arch == bfd_arch_h8300) | |
1705 | SELF_CHECK (status == REG_UNKNOWN); | |
1706 | else | |
1707 | SELF_CHECK (status == REG_VALID); | |
1708 | } | |
1709 | } | |
1710 | ||
236ef034 PA |
1711 | SELF_CHECK (mockctx.mock_target.fetch_registers_called == 0); |
1712 | SELF_CHECK (mockctx.mock_target.store_registers_called == 0); | |
1713 | SELF_CHECK (mockctx.mock_target.xfer_partial_called == 0); | |
a63f2d2f | 1714 | |
236ef034 | 1715 | mockctx.mock_target.reset (); |
a63f2d2f | 1716 | } |
1b30aaa5 YQ |
1717 | } |
1718 | ||
ec7a5fcb YQ |
1719 | /* Test regcache::cooked_write by writing some expected contents to |
1720 | registers, and checking that contents read from registers and the | |
1721 | expected contents are the same. */ | |
1722 | ||
1723 | static void | |
1724 | cooked_write_test (struct gdbarch *gdbarch) | |
1725 | { | |
1726 | /* Error out if debugging something, because we're going to push the | |
1727 | test target, which would pop any existing target. */ | |
66b4deae | 1728 | if (current_top_target ()->stratum () >= process_stratum) |
ec7a5fcb YQ |
1729 | error (_("target already pushed")); |
1730 | ||
1731 | /* Create a mock environment. A process_stratum target pushed. */ | |
1732 | ||
1733 | target_ops_no_register mock_target; | |
1734 | ||
1735 | /* Push the process_stratum target so we can mock accessing | |
1736 | registers. */ | |
1737 | push_target (&mock_target); | |
1738 | ||
1739 | /* Pop it again on exit (return/exception). */ | |
1740 | struct on_exit | |
1741 | { | |
1742 | ~on_exit () | |
1743 | { | |
1744 | pop_all_targets_at_and_above (process_stratum); | |
1745 | } | |
1746 | } pop_targets; | |
1747 | ||
5b6d1e4f | 1748 | readwrite_regcache readwrite (&mock_target, gdbarch); |
ec7a5fcb | 1749 | |
f6efe3f8 | 1750 | const int num_regs = gdbarch_num_cooked_regs (gdbarch); |
ec7a5fcb YQ |
1751 | |
1752 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1753 | { | |
1754 | if (register_size (gdbarch, regnum) == 0 | |
1755 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1756 | continue; | |
1757 | ||
1758 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1759 | ||
abf516c6 UW |
1760 | if (bfd_arch == bfd_arch_sparc |
1761 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1762 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1763 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1764 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1765 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1766 | continue; |
1767 | ||
1768 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1769 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1770 | const auto type = register_type (gdbarch, regnum); | |
1771 | ||
78134374 SM |
1772 | if (type->code () == TYPE_CODE_FLT |
1773 | || type->code () == TYPE_CODE_DECFLOAT) | |
ec7a5fcb YQ |
1774 | { |
1775 | /* Generate valid float format. */ | |
1776 | target_float_from_string (expected.data (), type, "1.25"); | |
1777 | } | |
78134374 SM |
1778 | else if (type->code () == TYPE_CODE_INT |
1779 | || type->code () == TYPE_CODE_ARRAY | |
1780 | || type->code () == TYPE_CODE_PTR | |
1781 | || type->code () == TYPE_CODE_UNION | |
1782 | || type->code () == TYPE_CODE_STRUCT) | |
ec7a5fcb YQ |
1783 | { |
1784 | if (bfd_arch == bfd_arch_ia64 | |
1785 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1786 | && (bfd_arch == bfd_arch_xtensa | |
1787 | || bfd_arch == bfd_arch_bfin | |
1788 | || bfd_arch == bfd_arch_m32c | |
1789 | /* m68hc11 pseudo registers are in memory. */ | |
1790 | || bfd_arch == bfd_arch_m68hc11 | |
1791 | || bfd_arch == bfd_arch_m68hc12 | |
1792 | || bfd_arch == bfd_arch_s390)) | |
1793 | || (bfd_arch == bfd_arch_frv | |
1794 | /* FRV pseudo registers except iacc0. */ | |
1795 | && regnum > gdbarch_num_regs (gdbarch))) | |
1796 | { | |
1797 | /* Skip setting the expected values for some architecture | |
1798 | registers. */ | |
1799 | } | |
1800 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1801 | { | |
1802 | /* RL78_PC_REGNUM */ | |
1803 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1804 | expected[j] = j; | |
1805 | } | |
1806 | else | |
1807 | { | |
1808 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1809 | expected[j] = j; | |
1810 | } | |
1811 | } | |
78134374 | 1812 | else if (type->code () == TYPE_CODE_FLAGS) |
ec7a5fcb YQ |
1813 | { |
1814 | /* No idea how to test flags. */ | |
1815 | continue; | |
1816 | } | |
1817 | else | |
1818 | { | |
1819 | /* If we don't know how to create the expected value for the | |
1820 | this type, make it fail. */ | |
1821 | SELF_CHECK (0); | |
1822 | } | |
1823 | ||
1824 | readwrite.cooked_write (regnum, expected.data ()); | |
1825 | ||
1826 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1827 | SELF_CHECK (expected == buf); | |
1828 | } | |
1829 | } | |
1830 | ||
8248946c YQ |
1831 | } // namespace selftests |
1832 | #endif /* GDB_SELF_TEST */ | |
1833 | ||
6c265988 | 1834 | void _initialize_regcache (); |
32178cab | 1835 | void |
6c265988 | 1836 | _initialize_regcache () |
32178cab | 1837 | { |
3e43a32a MS |
1838 | regcache_descr_handle |
1839 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1840 | |
76727919 TT |
1841 | gdb::observers::target_changed.attach (regcache_observer_target_changed); |
1842 | gdb::observers::thread_ptid_changed.attach | |
1843 | (regcache::regcache_thread_ptid_changed); | |
f4c5303c | 1844 | |
705152c5 | 1845 | add_com ("flushregs", class_maintenance, reg_flush_command, |
590042fc | 1846 | _("Force gdb to flush its register cache (maintainer command).")); |
39f77062 | 1847 | |
8248946c | 1848 | #if GDB_SELF_TEST |
1526853e | 1849 | selftests::register_test ("current_regcache", selftests::current_regcache_test); |
1b30aaa5 YQ |
1850 | |
1851 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1852 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1853 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1854 | selftests::cooked_write_test); | |
8248946c | 1855 | #endif |
32178cab | 1856 | } |