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" |
32178cab | 25 | #include "gdbarch.h" |
705152c5 | 26 | #include "gdbcmd.h" |
4e052eda | 27 | #include "regcache.h" |
b59ff9d5 | 28 | #include "reggroups.h" |
76727919 | 29 | #include "observable.h" |
0b309272 | 30 | #include "regset.h" |
94bb8dfe | 31 | #include <forward_list> |
32178cab MS |
32 | |
33 | /* | |
34 | * DATA STRUCTURE | |
35 | * | |
36 | * Here is the actual register cache. | |
37 | */ | |
38 | ||
3fadccb3 | 39 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 40 | Computed once when the architecture is created. */ |
3fadccb3 AC |
41 | |
42 | struct gdbarch_data *regcache_descr_handle; | |
43 | ||
44 | struct regcache_descr | |
45 | { | |
46 | /* The architecture this descriptor belongs to. */ | |
47 | struct gdbarch *gdbarch; | |
48 | ||
bb1db049 AC |
49 | /* The raw register cache. Each raw (or hard) register is supplied |
50 | by the target interface. The raw cache should not contain | |
51 | redundant information - if the PC is constructed from two | |
d2f0b918 | 52 | registers then those registers and not the PC lives in the raw |
bb1db049 | 53 | cache. */ |
3fadccb3 | 54 | long sizeof_raw_registers; |
3fadccb3 | 55 | |
d138e37a AC |
56 | /* The cooked register space. Each cooked register in the range |
57 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
58 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 59 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 60 | both raw registers and memory by the architecture methods |
02f60eae | 61 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 62 | int nr_cooked_registers; |
067df2e5 | 63 | long sizeof_cooked_registers; |
d138e37a | 64 | |
86d31898 | 65 | /* Offset and size (in 8 bit bytes), of each register in the |
d138e37a | 66 | register cache. All registers (including those in the range |
99e42fd8 PA |
67 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
68 | offset. */ | |
3fadccb3 | 69 | long *register_offset; |
3fadccb3 | 70 | long *sizeof_register; |
3fadccb3 | 71 | |
bb425013 AC |
72 | /* Cached table containing the type of each register. */ |
73 | struct type **register_type; | |
3fadccb3 AC |
74 | }; |
75 | ||
3fadccb3 AC |
76 | static void * |
77 | init_regcache_descr (struct gdbarch *gdbarch) | |
78 | { | |
79 | int i; | |
80 | struct regcache_descr *descr; | |
81 | gdb_assert (gdbarch != NULL); | |
82 | ||
bb425013 | 83 | /* Create an initial, zero filled, table. */ |
116f06ea | 84 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 85 | descr->gdbarch = gdbarch; |
3fadccb3 | 86 | |
d138e37a AC |
87 | /* Total size of the register space. The raw registers are mapped |
88 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 89 | either mapped onto raw-registers or memory. */ |
f6efe3f8 | 90 | descr->nr_cooked_registers = gdbarch_num_cooked_regs (gdbarch); |
3fadccb3 | 91 | |
bb425013 | 92 | /* Fill in a table of register types. */ |
116f06ea | 93 | descr->register_type |
3e43a32a MS |
94 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
95 | struct type *); | |
bb425013 | 96 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 97 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 98 | |
bb1db049 AC |
99 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
100 | into the register cache. */ | |
bb1db049 | 101 | |
067df2e5 | 102 | /* Lay out the register cache. |
3fadccb3 | 103 | |
bb425013 AC |
104 | NOTE: cagney/2002-05-22: Only register_type() is used when |
105 | constructing the register cache. It is assumed that the | |
106 | register's raw size, virtual size and type length are all the | |
107 | same. */ | |
3fadccb3 AC |
108 | |
109 | { | |
110 | long offset = 0; | |
123f5f96 | 111 | |
116f06ea AC |
112 | descr->sizeof_register |
113 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
114 | descr->register_offset | |
115 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
d999647b | 116 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
99e42fd8 PA |
117 | { |
118 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); | |
119 | descr->register_offset[i] = offset; | |
120 | offset += descr->sizeof_register[i]; | |
99e42fd8 PA |
121 | } |
122 | /* Set the real size of the raw register cache buffer. */ | |
123 | descr->sizeof_raw_registers = offset; | |
124 | ||
125 | for (; i < descr->nr_cooked_registers; i++) | |
3fadccb3 | 126 | { |
bb425013 | 127 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
128 | descr->register_offset[i] = offset; |
129 | offset += descr->sizeof_register[i]; | |
3fadccb3 | 130 | } |
99e42fd8 | 131 | /* Set the real size of the readonly register cache buffer. */ |
067df2e5 | 132 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
133 | } |
134 | ||
3fadccb3 AC |
135 | return descr; |
136 | } | |
137 | ||
138 | static struct regcache_descr * | |
139 | regcache_descr (struct gdbarch *gdbarch) | |
140 | { | |
19ba03f4 SM |
141 | return (struct regcache_descr *) gdbarch_data (gdbarch, |
142 | regcache_descr_handle); | |
3fadccb3 AC |
143 | } |
144 | ||
bb425013 AC |
145 | /* Utility functions returning useful register attributes stored in |
146 | the regcache descr. */ | |
147 | ||
148 | struct type * | |
149 | register_type (struct gdbarch *gdbarch, int regnum) | |
150 | { | |
151 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
123f5f96 | 152 | |
bb425013 AC |
153 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
154 | return descr->register_type[regnum]; | |
155 | } | |
156 | ||
0ed04cce AC |
157 | /* Utility functions returning useful register attributes stored in |
158 | the regcache descr. */ | |
159 | ||
08a617da AC |
160 | int |
161 | register_size (struct gdbarch *gdbarch, int regnum) | |
162 | { | |
163 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
164 | int size; | |
123f5f96 | 165 | |
f6efe3f8 | 166 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_cooked_regs (gdbarch)); |
08a617da | 167 | size = descr->sizeof_register[regnum]; |
08a617da AC |
168 | return size; |
169 | } | |
170 | ||
268a13a5 | 171 | /* See gdbsupport/common-regcache.h. */ |
8d689ee5 YQ |
172 | |
173 | int | |
174 | regcache_register_size (const struct regcache *regcache, int n) | |
175 | { | |
ac7936df | 176 | return register_size (regcache->arch (), n); |
8d689ee5 YQ |
177 | } |
178 | ||
31716595 YQ |
179 | reg_buffer::reg_buffer (gdbarch *gdbarch, bool has_pseudo) |
180 | : m_has_pseudo (has_pseudo) | |
3fadccb3 | 181 | { |
ef79d9a3 YQ |
182 | gdb_assert (gdbarch != NULL); |
183 | m_descr = regcache_descr (gdbarch); | |
4621115f | 184 | |
31716595 | 185 | if (has_pseudo) |
4621115f | 186 | { |
835dcf92 SM |
187 | m_registers.reset (new gdb_byte[m_descr->sizeof_cooked_registers] ()); |
188 | m_register_status.reset | |
189 | (new register_status[m_descr->nr_cooked_registers] ()); | |
4621115f YQ |
190 | } |
191 | else | |
192 | { | |
835dcf92 SM |
193 | m_registers.reset (new gdb_byte[m_descr->sizeof_raw_registers] ()); |
194 | m_register_status.reset | |
195 | (new register_status[gdbarch_num_regs (gdbarch)] ()); | |
4621115f | 196 | } |
31716595 YQ |
197 | } |
198 | ||
5b6d1e4f PA |
199 | regcache::regcache (process_stratum_target *target, gdbarch *gdbarch, |
200 | const address_space *aspace_) | |
796bb026 YQ |
201 | /* The register buffers. A read/write register cache can only hold |
202 | [0 .. gdbarch_num_regs). */ | |
5b6d1e4f | 203 | : detached_regcache (gdbarch, false), m_aspace (aspace_), m_target (target) |
31716595 | 204 | { |
ef79d9a3 YQ |
205 | m_ptid = minus_one_ptid; |
206 | } | |
4621115f | 207 | |
302abd6e SM |
208 | readonly_detached_regcache::readonly_detached_regcache (regcache &src) |
209 | : readonly_detached_regcache (src.arch (), | |
210 | [&src] (int regnum, gdb_byte *buf) | |
211 | { | |
212 | return src.cooked_read (regnum, buf); | |
213 | }) | |
daf6667d YQ |
214 | { |
215 | } | |
216 | ||
ef79d9a3 | 217 | gdbarch * |
31716595 | 218 | reg_buffer::arch () const |
ef79d9a3 YQ |
219 | { |
220 | return m_descr->gdbarch; | |
221 | } | |
3fadccb3 | 222 | |
51b1fe4e AC |
223 | /* Return a pointer to register REGNUM's buffer cache. */ |
224 | ||
ef79d9a3 | 225 | gdb_byte * |
31716595 | 226 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 227 | { |
835dcf92 | 228 | return m_registers.get () + m_descr->register_offset[regnum]; |
51b1fe4e AC |
229 | } |
230 | ||
ef79d9a3 | 231 | void |
302abd6e | 232 | reg_buffer::save (register_read_ftype cooked_read) |
ef79d9a3 YQ |
233 | { |
234 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 235 | int regnum; |
123f5f96 | 236 | |
daf6667d YQ |
237 | /* It should have pseudo registers. */ |
238 | gdb_assert (m_has_pseudo); | |
2d28509a | 239 | /* Clear the dest. */ |
835dcf92 SM |
240 | memset (m_registers.get (), 0, m_descr->sizeof_cooked_registers); |
241 | memset (m_register_status.get (), REG_UNKNOWN, m_descr->nr_cooked_registers); | |
2d28509a | 242 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
243 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
244 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 245 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 246 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
247 | { |
248 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
249 | { | |
50d6adef | 250 | gdb_byte *dst_buf = register_buffer (regnum); |
302abd6e | 251 | enum register_status status = cooked_read (regnum, dst_buf); |
123f5f96 | 252 | |
50d6adef AH |
253 | gdb_assert (status != REG_UNKNOWN); |
254 | ||
255 | if (status != REG_VALID) | |
256 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 257 | |
ef79d9a3 | 258 | m_register_status[regnum] = status; |
2d28509a AC |
259 | } |
260 | } | |
261 | } | |
262 | ||
ef79d9a3 | 263 | void |
daf6667d | 264 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 265 | { |
ef79d9a3 | 266 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 267 | int regnum; |
123f5f96 | 268 | |
fc5b8736 | 269 | gdb_assert (src != NULL); |
daf6667d | 270 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
271 | |
272 | gdb_assert (gdbarch == src->arch ()); | |
273 | ||
2d28509a | 274 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
275 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
276 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 277 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 278 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 279 | { |
5602984a | 280 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 281 | { |
ef79d9a3 YQ |
282 | if (src->m_register_status[regnum] == REG_VALID) |
283 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
284 | } |
285 | } | |
286 | } | |
287 | ||
268a13a5 | 288 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 289 | |
ef79d9a3 | 290 | enum register_status |
c8ec2f33 | 291 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 292 | { |
c8ec2f33 | 293 | assert_regnum (regnum); |
6ed7ea50 | 294 | |
aac0d564 | 295 | return m_register_status[regnum]; |
3fadccb3 AC |
296 | } |
297 | ||
ef79d9a3 | 298 | void |
9c861883 | 299 | reg_buffer::invalidate (int regnum) |
ef79d9a3 | 300 | { |
4e888c28 | 301 | assert_regnum (regnum); |
ef79d9a3 YQ |
302 | m_register_status[regnum] = REG_UNKNOWN; |
303 | } | |
9c5ea4d9 | 304 | |
4e888c28 | 305 | void |
31716595 | 306 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 307 | { |
31716595 YQ |
308 | gdb_assert (regnum >= 0); |
309 | if (m_has_pseudo) | |
310 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
311 | else | |
312 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
313 | } |
314 | ||
3fadccb3 | 315 | /* Global structure containing the current regcache. */ |
3fadccb3 | 316 | |
5ebd2499 | 317 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
318 | recording if the register values have been changed (eg. by the |
319 | user). Therefore all registers must be written back to the | |
320 | target when appropriate. */ | |
e521e87e | 321 | std::forward_list<regcache *> regcache::current_regcache; |
c2250ad1 UW |
322 | |
323 | struct regcache * | |
5b6d1e4f PA |
324 | get_thread_arch_aspace_regcache (process_stratum_target *target, |
325 | ptid_t ptid, struct gdbarch *gdbarch, | |
e2d96639 | 326 | struct address_space *aspace) |
c2250ad1 | 327 | { |
5b6d1e4f PA |
328 | gdb_assert (target != nullptr); |
329 | ||
e521e87e | 330 | for (const auto ®cache : regcache::current_regcache) |
5b6d1e4f PA |
331 | if (regcache->target () == target |
332 | && regcache->ptid () == ptid | |
333 | && regcache->arch () == gdbarch) | |
94bb8dfe | 334 | return regcache; |
594f7785 | 335 | |
5b6d1e4f | 336 | regcache *new_regcache = new regcache (target, gdbarch, aspace); |
594f7785 | 337 | |
e521e87e | 338 | regcache::current_regcache.push_front (new_regcache); |
ef79d9a3 | 339 | new_regcache->set_ptid (ptid); |
e2d96639 | 340 | |
e2d96639 YQ |
341 | return new_regcache; |
342 | } | |
343 | ||
344 | struct regcache * | |
5b6d1e4f PA |
345 | get_thread_arch_regcache (process_stratum_target *target, ptid_t ptid, |
346 | struct gdbarch *gdbarch) | |
e2d96639 | 347 | { |
5b6d1e4f PA |
348 | scoped_restore_current_inferior restore_current_inferior; |
349 | set_current_inferior (find_inferior_ptid (target, ptid)); | |
ed4227b7 | 350 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 351 | |
5b6d1e4f | 352 | return get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace); |
594f7785 UW |
353 | } |
354 | ||
5b6d1e4f | 355 | static process_stratum_target *current_thread_target; |
c2250ad1 UW |
356 | static ptid_t current_thread_ptid; |
357 | static struct gdbarch *current_thread_arch; | |
358 | ||
359 | struct regcache * | |
5b6d1e4f | 360 | get_thread_regcache (process_stratum_target *target, ptid_t ptid) |
c2250ad1 | 361 | { |
5b6d1e4f PA |
362 | if (!current_thread_arch |
363 | || target != current_thread_target | |
364 | || current_thread_ptid != ptid) | |
c2250ad1 | 365 | { |
5b6d1e4f PA |
366 | gdb_assert (ptid != null_ptid); |
367 | ||
c2250ad1 | 368 | current_thread_ptid = ptid; |
5b6d1e4f PA |
369 | current_thread_target = target; |
370 | ||
371 | scoped_restore_current_inferior restore_current_inferior; | |
372 | set_current_inferior (find_inferior_ptid (target, ptid)); | |
c2250ad1 UW |
373 | current_thread_arch = target_thread_architecture (ptid); |
374 | } | |
375 | ||
5b6d1e4f | 376 | return get_thread_arch_regcache (target, ptid, current_thread_arch); |
c2250ad1 UW |
377 | } |
378 | ||
00431a78 PA |
379 | /* See regcache.h. */ |
380 | ||
381 | struct regcache * | |
382 | get_thread_regcache (thread_info *thread) | |
383 | { | |
5b6d1e4f PA |
384 | return get_thread_regcache (thread->inf->process_target (), |
385 | thread->ptid); | |
00431a78 PA |
386 | } |
387 | ||
c2250ad1 UW |
388 | struct regcache * |
389 | get_current_regcache (void) | |
594f7785 | 390 | { |
00431a78 | 391 | return get_thread_regcache (inferior_thread ()); |
594f7785 | 392 | } |
32178cab | 393 | |
268a13a5 | 394 | /* See gdbsupport/common-regcache.h. */ |
361c8ade GB |
395 | |
396 | struct regcache * | |
397 | get_thread_regcache_for_ptid (ptid_t ptid) | |
398 | { | |
5b6d1e4f PA |
399 | /* This function doesn't take a process_stratum_target parameter |
400 | because it's a gdbsupport/ routine implemented by both gdb and | |
401 | gdbserver. It always refers to a ptid of the current target. */ | |
402 | process_stratum_target *proc_target = current_inferior ()->process_target (); | |
403 | return get_thread_regcache (proc_target, ptid); | |
361c8ade | 404 | } |
32178cab | 405 | |
f4c5303c OF |
406 | /* Observer for the target_changed event. */ |
407 | ||
2c0b251b | 408 | static void |
f4c5303c OF |
409 | regcache_observer_target_changed (struct target_ops *target) |
410 | { | |
411 | registers_changed (); | |
412 | } | |
413 | ||
5231c1fd PA |
414 | /* Update global variables old ptids to hold NEW_PTID if they were |
415 | holding OLD_PTID. */ | |
e521e87e YQ |
416 | void |
417 | regcache::regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) | |
5231c1fd | 418 | { |
e521e87e | 419 | for (auto ®cache : regcache::current_regcache) |
94bb8dfe | 420 | { |
d7e15655 | 421 | if (regcache->ptid () == old_ptid) |
94bb8dfe YQ |
422 | regcache->set_ptid (new_ptid); |
423 | } | |
5231c1fd PA |
424 | } |
425 | ||
32178cab MS |
426 | /* Low level examining and depositing of registers. |
427 | ||
428 | The caller is responsible for making sure that the inferior is | |
429 | stopped before calling the fetching routines, or it will get | |
430 | garbage. (a change from GDB version 3, in which the caller got the | |
431 | value from the last stop). */ | |
432 | ||
433 | /* REGISTERS_CHANGED () | |
434 | ||
435 | Indicate that registers may have changed, so invalidate the cache. */ | |
436 | ||
437 | void | |
5b6d1e4f | 438 | registers_changed_ptid (process_stratum_target *target, ptid_t ptid) |
32178cab | 439 | { |
e521e87e | 440 | for (auto oit = regcache::current_regcache.before_begin (), |
94bb8dfe | 441 | it = std::next (oit); |
e521e87e | 442 | it != regcache::current_regcache.end (); |
94bb8dfe | 443 | ) |
c2250ad1 | 444 | { |
5b6d1e4f PA |
445 | struct regcache *regcache = *it; |
446 | if ((target == nullptr || regcache->target () == target) | |
447 | && regcache->ptid ().matches (ptid)) | |
e66408ed | 448 | { |
5b6d1e4f | 449 | delete regcache; |
e521e87e | 450 | it = regcache::current_regcache.erase_after (oit); |
e66408ed | 451 | } |
94bb8dfe YQ |
452 | else |
453 | oit = it++; | |
c2250ad1 | 454 | } |
32178cab | 455 | |
5b6d1e4f PA |
456 | if ((target == nullptr || current_thread_target == target) |
457 | && current_thread_ptid.matches (ptid)) | |
041274d8 | 458 | { |
5b6d1e4f | 459 | current_thread_target = NULL; |
041274d8 PA |
460 | current_thread_ptid = null_ptid; |
461 | current_thread_arch = NULL; | |
462 | } | |
32178cab | 463 | |
5b6d1e4f PA |
464 | if ((target == nullptr || current_inferior ()->process_target () == target) |
465 | && inferior_ptid.matches (ptid)) | |
041274d8 PA |
466 | { |
467 | /* We just deleted the regcache of the current thread. Need to | |
468 | forget about any frames we have cached, too. */ | |
469 | reinit_frame_cache (); | |
470 | } | |
471 | } | |
c2250ad1 | 472 | |
00431a78 PA |
473 | /* See regcache.h. */ |
474 | ||
475 | void | |
476 | registers_changed_thread (thread_info *thread) | |
477 | { | |
5b6d1e4f | 478 | registers_changed_ptid (thread->inf->process_target (), thread->ptid); |
00431a78 PA |
479 | } |
480 | ||
041274d8 PA |
481 | void |
482 | registers_changed (void) | |
483 | { | |
5b6d1e4f | 484 | registers_changed_ptid (nullptr, minus_one_ptid); |
32178cab MS |
485 | } |
486 | ||
ef79d9a3 YQ |
487 | void |
488 | regcache::raw_update (int regnum) | |
489 | { | |
4e888c28 | 490 | assert_regnum (regnum); |
8e368124 | 491 | |
3fadccb3 AC |
492 | /* Make certain that the register cache is up-to-date with respect |
493 | to the current thread. This switching shouldn't be necessary | |
494 | only there is still only one target side register cache. Sigh! | |
495 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 496 | |
796bb026 | 497 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 498 | { |
ef79d9a3 | 499 | target_fetch_registers (this, regnum); |
788c8b10 PA |
500 | |
501 | /* A number of targets can't access the whole set of raw | |
502 | registers (because the debug API provides no means to get at | |
503 | them). */ | |
ef79d9a3 YQ |
504 | if (m_register_status[regnum] == REG_UNKNOWN) |
505 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 506 | } |
8e368124 AH |
507 | } |
508 | ||
ef79d9a3 | 509 | enum register_status |
849d0ba8 | 510 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
511 | { |
512 | gdb_assert (buf != NULL); | |
ef79d9a3 | 513 | raw_update (regnum); |
05d1431c | 514 | |
ef79d9a3 YQ |
515 | if (m_register_status[regnum] != REG_VALID) |
516 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 517 | else |
ef79d9a3 YQ |
518 | memcpy (buf, register_buffer (regnum), |
519 | m_descr->sizeof_register[regnum]); | |
05d1431c | 520 | |
aac0d564 | 521 | return m_register_status[regnum]; |
61a0eb5b AC |
522 | } |
523 | ||
05d1431c | 524 | enum register_status |
28fc6740 | 525 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
526 | { |
527 | gdb_assert (regcache != NULL); | |
6f98355c | 528 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
529 | } |
530 | ||
6f98355c | 531 | template<typename T, typename> |
ef79d9a3 | 532 | enum register_status |
849d0ba8 | 533 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 534 | { |
2d522557 | 535 | gdb_byte *buf; |
05d1431c | 536 | enum register_status status; |
123f5f96 | 537 | |
4e888c28 | 538 | assert_regnum (regnum); |
ef79d9a3 YQ |
539 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
540 | status = raw_read (regnum, buf); | |
05d1431c | 541 | if (status == REG_VALID) |
6f98355c YQ |
542 | *val = extract_integer<T> (buf, |
543 | m_descr->sizeof_register[regnum], | |
544 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
545 | else |
546 | *val = 0; | |
547 | return status; | |
28fc6740 AC |
548 | } |
549 | ||
05d1431c | 550 | enum register_status |
28fc6740 AC |
551 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
552 | ULONGEST *val) | |
ef79d9a3 YQ |
553 | { |
554 | gdb_assert (regcache != NULL); | |
6f98355c | 555 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
556 | } |
557 | ||
c00dcbe9 MK |
558 | void |
559 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
560 | { |
561 | gdb_assert (regcache != NULL); | |
6f98355c | 562 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
563 | } |
564 | ||
6f98355c | 565 | template<typename T, typename> |
ef79d9a3 | 566 | void |
6f98355c | 567 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 568 | { |
7c543f7b | 569 | gdb_byte *buf; |
123f5f96 | 570 | |
4e888c28 | 571 | assert_regnum (regnum); |
ef79d9a3 | 572 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
573 | store_integer (buf, m_descr->sizeof_register[regnum], |
574 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 575 | raw_write (regnum, buf); |
c00dcbe9 MK |
576 | } |
577 | ||
578 | void | |
579 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
580 | ULONGEST val) | |
ef79d9a3 YQ |
581 | { |
582 | gdb_assert (regcache != NULL); | |
6f98355c | 583 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
584 | } |
585 | ||
9fd15b2e YQ |
586 | LONGEST |
587 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
588 | { | |
589 | LONGEST value; | |
590 | enum register_status status; | |
591 | ||
592 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
593 | if (status == REG_UNAVAILABLE) | |
594 | throw_error (NOT_AVAILABLE_ERROR, | |
595 | _("Register %d is not available"), regnum); | |
596 | return value; | |
597 | } | |
598 | ||
ef79d9a3 | 599 | enum register_status |
849d0ba8 | 600 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 601 | { |
d138e37a | 602 | gdb_assert (regnum >= 0); |
ef79d9a3 | 603 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 604 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 605 | return raw_read (regnum, buf); |
849d0ba8 | 606 | else if (m_has_pseudo |
ef79d9a3 | 607 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 608 | { |
ef79d9a3 YQ |
609 | if (m_register_status[regnum] == REG_VALID) |
610 | memcpy (buf, register_buffer (regnum), | |
611 | m_descr->sizeof_register[regnum]); | |
05d1431c | 612 | else |
ef79d9a3 | 613 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 614 | |
aac0d564 | 615 | return m_register_status[regnum]; |
05d1431c | 616 | } |
ef79d9a3 | 617 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
618 | { |
619 | struct value *mark, *computed; | |
620 | enum register_status result = REG_VALID; | |
621 | ||
622 | mark = value_mark (); | |
623 | ||
ef79d9a3 YQ |
624 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
625 | this, regnum); | |
3543a589 TT |
626 | if (value_entirely_available (computed)) |
627 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 628 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
629 | else |
630 | { | |
ef79d9a3 | 631 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
632 | result = REG_UNAVAILABLE; |
633 | } | |
634 | ||
635 | value_free_to_mark (mark); | |
636 | ||
637 | return result; | |
638 | } | |
d138e37a | 639 | else |
ef79d9a3 | 640 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 641 | regnum, buf); |
61a0eb5b AC |
642 | } |
643 | ||
ef79d9a3 | 644 | struct value * |
849d0ba8 | 645 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
646 | { |
647 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 648 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 649 | |
d999647b | 650 | if (regnum < num_raw_registers () |
849d0ba8 | 651 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 652 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
653 | { |
654 | struct value *result; | |
655 | ||
ef79d9a3 | 656 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
657 | VALUE_LVAL (result) = lval_register; |
658 | VALUE_REGNUM (result) = regnum; | |
659 | ||
660 | /* It is more efficient in general to do this delegation in this | |
661 | direction than in the other one, even though the value-based | |
662 | API is preferred. */ | |
ef79d9a3 YQ |
663 | if (cooked_read (regnum, |
664 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
665 | mark_value_bytes_unavailable (result, 0, |
666 | TYPE_LENGTH (value_type (result))); | |
667 | ||
668 | return result; | |
669 | } | |
670 | else | |
ef79d9a3 YQ |
671 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
672 | this, regnum); | |
3543a589 TT |
673 | } |
674 | ||
05d1431c | 675 | enum register_status |
a378f419 AC |
676 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
677 | LONGEST *val) | |
ef79d9a3 YQ |
678 | { |
679 | gdb_assert (regcache != NULL); | |
6f98355c | 680 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
681 | } |
682 | ||
6f98355c | 683 | template<typename T, typename> |
ef79d9a3 | 684 | enum register_status |
849d0ba8 | 685 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 686 | { |
05d1431c | 687 | enum register_status status; |
2d522557 | 688 | gdb_byte *buf; |
123f5f96 | 689 | |
ef79d9a3 YQ |
690 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
691 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
692 | status = cooked_read (regnum, buf); | |
05d1431c | 693 | if (status == REG_VALID) |
6f98355c YQ |
694 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
695 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
696 | else |
697 | *val = 0; | |
698 | return status; | |
a378f419 AC |
699 | } |
700 | ||
05d1431c | 701 | enum register_status |
a378f419 AC |
702 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
703 | ULONGEST *val) | |
ef79d9a3 YQ |
704 | { |
705 | gdb_assert (regcache != NULL); | |
6f98355c | 706 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
707 | } |
708 | ||
a66a9c23 AC |
709 | void |
710 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
711 | LONGEST val) | |
ef79d9a3 YQ |
712 | { |
713 | gdb_assert (regcache != NULL); | |
6f98355c | 714 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
715 | } |
716 | ||
6f98355c | 717 | template<typename T, typename> |
ef79d9a3 | 718 | void |
6f98355c | 719 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 720 | { |
7c543f7b | 721 | gdb_byte *buf; |
123f5f96 | 722 | |
ef79d9a3 YQ |
723 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
724 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
725 | store_integer (buf, m_descr->sizeof_register[regnum], |
726 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 727 | cooked_write (regnum, buf); |
a66a9c23 AC |
728 | } |
729 | ||
730 | void | |
731 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
732 | ULONGEST val) | |
ef79d9a3 YQ |
733 | { |
734 | gdb_assert (regcache != NULL); | |
6f98355c | 735 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
736 | } |
737 | ||
ef79d9a3 YQ |
738 | void |
739 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 740 | { |
594f7785 | 741 | |
ef79d9a3 | 742 | gdb_assert (buf != NULL); |
4e888c28 | 743 | assert_regnum (regnum); |
3fadccb3 | 744 | |
3fadccb3 AC |
745 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
746 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 747 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
748 | return; |
749 | ||
3fadccb3 | 750 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 751 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
752 | if (get_register_status (regnum) == REG_VALID |
753 | && (memcmp (register_buffer (regnum), buf, | |
754 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
755 | return; |
756 | ||
ef79d9a3 | 757 | target_prepare_to_store (this); |
c8ec2f33 | 758 | raw_supply (regnum, buf); |
b94ade42 | 759 | |
b292235f TT |
760 | /* Invalidate the register after it is written, in case of a |
761 | failure. */ | |
311dc83a TT |
762 | auto invalidator |
763 | = make_scope_exit ([&] { this->invalidate (regnum); }); | |
b94ade42 | 764 | |
ef79d9a3 | 765 | target_store_registers (this, regnum); |
594f7785 | 766 | |
b292235f TT |
767 | /* The target did not throw an error so we can discard invalidating |
768 | the register. */ | |
769 | invalidator.release (); | |
61a0eb5b AC |
770 | } |
771 | ||
ef79d9a3 YQ |
772 | void |
773 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 774 | { |
d138e37a | 775 | gdb_assert (regnum >= 0); |
ef79d9a3 | 776 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 777 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 778 | raw_write (regnum, buf); |
d138e37a | 779 | else |
ef79d9a3 | 780 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 781 | regnum, buf); |
61a0eb5b AC |
782 | } |
783 | ||
33bab475 | 784 | /* See regcache.h. */ |
06c0b04e | 785 | |
ef79d9a3 | 786 | enum register_status |
33bab475 AH |
787 | readable_regcache::read_part (int regnum, int offset, int len, |
788 | gdb_byte *out, bool is_raw) | |
849d0ba8 | 789 | { |
33bab475 AH |
790 | int reg_size = register_size (arch (), regnum); |
791 | ||
792 | gdb_assert (out != NULL); | |
8e7767e3 AH |
793 | gdb_assert (offset >= 0 && offset <= reg_size); |
794 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
795 | |
796 | if (offset == 0 && len == 0) | |
797 | { | |
798 | /* Nothing to do. */ | |
799 | return REG_VALID; | |
800 | } | |
801 | ||
802 | if (offset == 0 && len == reg_size) | |
803 | { | |
804 | /* Read the full register. */ | |
805 | return (is_raw) ? raw_read (regnum, out) : cooked_read (regnum, out); | |
806 | } | |
849d0ba8 | 807 | |
849d0ba8 | 808 | enum register_status status; |
33bab475 | 809 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); |
849d0ba8 | 810 | |
33bab475 AH |
811 | /* Read full register to buffer. */ |
812 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
849d0ba8 YQ |
813 | if (status != REG_VALID) |
814 | return status; | |
815 | ||
33bab475 AH |
816 | /* Copy out. */ |
817 | memcpy (out, reg + offset, len); | |
849d0ba8 YQ |
818 | return REG_VALID; |
819 | } | |
820 | ||
33bab475 AH |
821 | /* See regcache.h. */ |
822 | ||
8e7767e3 AH |
823 | void |
824 | reg_buffer::raw_collect_part (int regnum, int offset, int len, | |
825 | gdb_byte *out) const | |
826 | { | |
827 | int reg_size = register_size (arch (), regnum); | |
828 | ||
829 | gdb_assert (out != nullptr); | |
830 | gdb_assert (offset >= 0 && offset <= reg_size); | |
831 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
832 | ||
833 | if (offset == 0 && len == 0) | |
834 | { | |
835 | /* Nothing to do. */ | |
836 | return; | |
837 | } | |
838 | ||
839 | if (offset == 0 && len == reg_size) | |
840 | { | |
841 | /* Collect the full register. */ | |
842 | return raw_collect (regnum, out); | |
843 | } | |
844 | ||
845 | /* Read to buffer, then write out. */ | |
846 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
847 | raw_collect (regnum, reg); | |
848 | memcpy (out, reg + offset, len); | |
849 | } | |
850 | ||
851 | /* See regcache.h. */ | |
852 | ||
849d0ba8 YQ |
853 | enum register_status |
854 | regcache::write_part (int regnum, int offset, int len, | |
33bab475 | 855 | const gdb_byte *in, bool is_raw) |
ef79d9a3 | 856 | { |
33bab475 | 857 | int reg_size = register_size (arch (), regnum); |
123f5f96 | 858 | |
33bab475 | 859 | gdb_assert (in != NULL); |
8e7767e3 AH |
860 | gdb_assert (offset >= 0 && offset <= reg_size); |
861 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
862 | |
863 | if (offset == 0 && len == 0) | |
06c0b04e | 864 | { |
33bab475 AH |
865 | /* Nothing to do. */ |
866 | return REG_VALID; | |
867 | } | |
05d1431c | 868 | |
33bab475 AH |
869 | if (offset == 0 && len == reg_size) |
870 | { | |
871 | /* Write the full register. */ | |
872 | (is_raw) ? raw_write (regnum, in) : cooked_write (regnum, in); | |
873 | return REG_VALID; | |
06c0b04e | 874 | } |
849d0ba8 | 875 | |
33bab475 AH |
876 | enum register_status status; |
877 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
05d1431c | 878 | |
33bab475 AH |
879 | /* Read existing register to buffer. */ |
880 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
881 | if (status != REG_VALID) | |
882 | return status; | |
883 | ||
884 | /* Update buffer, then write back to regcache. */ | |
885 | memcpy (reg + offset, in, len); | |
886 | is_raw ? raw_write (regnum, reg) : cooked_write (regnum, reg); | |
05d1431c | 887 | return REG_VALID; |
06c0b04e AC |
888 | } |
889 | ||
33bab475 AH |
890 | /* See regcache.h. */ |
891 | ||
8e7767e3 AH |
892 | void |
893 | reg_buffer::raw_supply_part (int regnum, int offset, int len, | |
894 | const gdb_byte *in) | |
895 | { | |
896 | int reg_size = register_size (arch (), regnum); | |
897 | ||
898 | gdb_assert (in != nullptr); | |
899 | gdb_assert (offset >= 0 && offset <= reg_size); | |
900 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
901 | ||
902 | if (offset == 0 && len == 0) | |
903 | { | |
904 | /* Nothing to do. */ | |
905 | return; | |
906 | } | |
907 | ||
908 | if (offset == 0 && len == reg_size) | |
909 | { | |
910 | /* Supply the full register. */ | |
911 | return raw_supply (regnum, in); | |
912 | } | |
913 | ||
914 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
915 | ||
916 | /* Read existing value to buffer. */ | |
917 | raw_collect (regnum, reg); | |
918 | ||
919 | /* Write to buffer, then write out. */ | |
920 | memcpy (reg + offset, in, len); | |
921 | raw_supply (regnum, reg); | |
922 | } | |
923 | ||
ef79d9a3 | 924 | enum register_status |
33bab475 AH |
925 | readable_regcache::raw_read_part (int regnum, int offset, int len, |
926 | gdb_byte *buf) | |
ef79d9a3 | 927 | { |
4e888c28 | 928 | assert_regnum (regnum); |
849d0ba8 | 929 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
930 | } |
931 | ||
4f0420fd | 932 | /* See regcache.h. */ |
123f5f96 | 933 | |
ef79d9a3 YQ |
934 | void |
935 | regcache::raw_write_part (int regnum, int offset, int len, | |
936 | const gdb_byte *buf) | |
937 | { | |
4e888c28 | 938 | assert_regnum (regnum); |
849d0ba8 | 939 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
940 | } |
941 | ||
33bab475 AH |
942 | /* See regcache.h. */ |
943 | ||
ef79d9a3 | 944 | enum register_status |
849d0ba8 YQ |
945 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
946 | gdb_byte *buf) | |
ef79d9a3 YQ |
947 | { |
948 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 949 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
950 | } |
951 | ||
33bab475 AH |
952 | /* See regcache.h. */ |
953 | ||
ef79d9a3 YQ |
954 | void |
955 | regcache::cooked_write_part (int regnum, int offset, int len, | |
956 | const gdb_byte *buf) | |
957 | { | |
958 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 959 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 960 | } |
32178cab | 961 | |
268a13a5 | 962 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 963 | |
ef79d9a3 | 964 | void |
9c861883 | 965 | reg_buffer::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
966 | { |
967 | void *regbuf; | |
968 | size_t size; | |
969 | ||
4e888c28 | 970 | assert_regnum (regnum); |
9a661b68 | 971 | |
ef79d9a3 YQ |
972 | regbuf = register_buffer (regnum); |
973 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
974 | |
975 | if (buf) | |
ee99023e PA |
976 | { |
977 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 978 | m_register_status[regnum] = REG_VALID; |
ee99023e | 979 | } |
9a661b68 | 980 | else |
ee99023e PA |
981 | { |
982 | /* This memset not strictly necessary, but better than garbage | |
983 | in case the register value manages to escape somewhere (due | |
984 | to a bug, no less). */ | |
985 | memset (regbuf, 0, size); | |
ef79d9a3 | 986 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 987 | } |
9a661b68 MK |
988 | } |
989 | ||
9c861883 | 990 | /* See regcache.h. */ |
b057297a AH |
991 | |
992 | void | |
9c861883 AH |
993 | reg_buffer::raw_supply_integer (int regnum, const gdb_byte *addr, |
994 | int addr_len, bool is_signed) | |
b057297a AH |
995 | { |
996 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
997 | gdb_byte *regbuf; | |
998 | size_t regsize; | |
999 | ||
4e888c28 | 1000 | assert_regnum (regnum); |
b057297a AH |
1001 | |
1002 | regbuf = register_buffer (regnum); | |
1003 | regsize = m_descr->sizeof_register[regnum]; | |
1004 | ||
1005 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
1006 | byte_order); | |
1007 | m_register_status[regnum] = REG_VALID; | |
1008 | } | |
1009 | ||
9c861883 | 1010 | /* See regcache.h. */ |
f81fdd35 AH |
1011 | |
1012 | void | |
9c861883 | 1013 | reg_buffer::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1014 | { |
1015 | void *regbuf; | |
1016 | size_t size; | |
1017 | ||
4e888c28 | 1018 | assert_regnum (regnum); |
f81fdd35 AH |
1019 | |
1020 | regbuf = register_buffer (regnum); | |
1021 | size = m_descr->sizeof_register[regnum]; | |
1022 | ||
1023 | memset (regbuf, 0, size); | |
1024 | m_register_status[regnum] = REG_VALID; | |
1025 | } | |
1026 | ||
268a13a5 | 1027 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 1028 | |
ef79d9a3 | 1029 | void |
9c861883 | 1030 | reg_buffer::raw_collect (int regnum, void *buf) const |
9a661b68 MK |
1031 | { |
1032 | const void *regbuf; | |
1033 | size_t size; | |
1034 | ||
ef79d9a3 | 1035 | gdb_assert (buf != NULL); |
4e888c28 | 1036 | assert_regnum (regnum); |
9a661b68 | 1037 | |
ef79d9a3 YQ |
1038 | regbuf = register_buffer (regnum); |
1039 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1040 | memcpy (buf, regbuf, size); |
1041 | } | |
1042 | ||
9c861883 | 1043 | /* See regcache.h. */ |
b057297a AH |
1044 | |
1045 | void | |
9c861883 AH |
1046 | reg_buffer::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
1047 | bool is_signed) const | |
b057297a AH |
1048 | { |
1049 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1050 | const gdb_byte *regbuf; | |
1051 | size_t regsize; | |
1052 | ||
4e888c28 | 1053 | assert_regnum (regnum); |
b057297a AH |
1054 | |
1055 | regbuf = register_buffer (regnum); | |
1056 | regsize = m_descr->sizeof_register[regnum]; | |
1057 | ||
1058 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
1059 | byte_order); | |
1060 | } | |
1061 | ||
8e7767e3 AH |
1062 | /* See regcache.h. */ |
1063 | ||
1064 | void | |
1065 | regcache::transfer_regset_register (struct regcache *out_regcache, int regnum, | |
1066 | const gdb_byte *in_buf, gdb_byte *out_buf, | |
1067 | int slot_size, int offs) const | |
1068 | { | |
1069 | struct gdbarch *gdbarch = arch (); | |
1070 | int reg_size = std::min (register_size (gdbarch, regnum), slot_size); | |
1071 | ||
1072 | /* Use part versions and reg_size to prevent possible buffer overflows when | |
1073 | accessing the regcache. */ | |
1074 | ||
1075 | if (out_buf != nullptr) | |
1076 | { | |
1077 | raw_collect_part (regnum, 0, reg_size, out_buf + offs); | |
1078 | ||
1079 | /* Ensure any additional space is cleared. */ | |
1080 | if (slot_size > reg_size) | |
1081 | memset (out_buf + offs + reg_size, 0, slot_size - reg_size); | |
1082 | } | |
1083 | else if (in_buf != nullptr) | |
1084 | out_regcache->raw_supply_part (regnum, 0, reg_size, in_buf + offs); | |
1085 | else | |
1086 | { | |
1087 | /* Invalidate the register. */ | |
1088 | out_regcache->raw_supply (regnum, nullptr); | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | /* See regcache.h. */ | |
9c861883 | 1093 | |
ef79d9a3 YQ |
1094 | void |
1095 | regcache::transfer_regset (const struct regset *regset, | |
1096 | struct regcache *out_regcache, | |
8e7767e3 AH |
1097 | int regnum, const gdb_byte *in_buf, |
1098 | gdb_byte *out_buf, size_t size) const | |
0b309272 AA |
1099 | { |
1100 | const struct regcache_map_entry *map; | |
1101 | int offs = 0, count; | |
1102 | ||
19ba03f4 SM |
1103 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1104 | (count = map->count) != 0; | |
1105 | map++) | |
0b309272 AA |
1106 | { |
1107 | int regno = map->regno; | |
1108 | int slot_size = map->size; | |
1109 | ||
1110 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1111 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1112 | |
1113 | if (regno == REGCACHE_MAP_SKIP | |
1114 | || (regnum != -1 | |
1115 | && (regnum < regno || regnum >= regno + count))) | |
1116 | offs += count * slot_size; | |
1117 | ||
1118 | else if (regnum == -1) | |
1119 | for (; count--; regno++, offs += slot_size) | |
1120 | { | |
1121 | if (offs + slot_size > size) | |
1122 | break; | |
1123 | ||
8e7767e3 AH |
1124 | transfer_regset_register (out_regcache, regno, in_buf, out_buf, |
1125 | slot_size, offs); | |
0b309272 AA |
1126 | } |
1127 | else | |
1128 | { | |
1129 | /* Transfer a single register and return. */ | |
1130 | offs += (regnum - regno) * slot_size; | |
1131 | if (offs + slot_size > size) | |
1132 | return; | |
1133 | ||
8e7767e3 AH |
1134 | transfer_regset_register (out_regcache, regnum, in_buf, out_buf, |
1135 | slot_size, offs); | |
0b309272 AA |
1136 | return; |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1142 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1143 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1144 | ||
1145 | void | |
1146 | regcache_supply_regset (const struct regset *regset, | |
1147 | struct regcache *regcache, | |
1148 | int regnum, const void *buf, size_t size) | |
1149 | { | |
8e7767e3 | 1150 | regcache->supply_regset (regset, regnum, (const gdb_byte *) buf, size); |
ef79d9a3 YQ |
1151 | } |
1152 | ||
1153 | void | |
1154 | regcache::supply_regset (const struct regset *regset, | |
1155 | int regnum, const void *buf, size_t size) | |
1156 | { | |
8e7767e3 | 1157 | transfer_regset (regset, this, regnum, (const gdb_byte *) buf, nullptr, size); |
0b309272 AA |
1158 | } |
1159 | ||
1160 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1161 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1162 | REGSET. */ | |
1163 | ||
1164 | void | |
1165 | regcache_collect_regset (const struct regset *regset, | |
1166 | const struct regcache *regcache, | |
1167 | int regnum, void *buf, size_t size) | |
1168 | { | |
8e7767e3 | 1169 | regcache->collect_regset (regset, regnum, (gdb_byte *) buf, size); |
ef79d9a3 YQ |
1170 | } |
1171 | ||
1172 | void | |
1173 | regcache::collect_regset (const struct regset *regset, | |
1174 | int regnum, void *buf, size_t size) const | |
1175 | { | |
8e7767e3 | 1176 | transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size); |
0b309272 AA |
1177 | } |
1178 | ||
268a13a5 | 1179 | /* See gdbsupport/common-regcache.h. */ |
f868386e AH |
1180 | |
1181 | bool | |
1182 | reg_buffer::raw_compare (int regnum, const void *buf, int offset) const | |
1183 | { | |
1184 | gdb_assert (buf != NULL); | |
1185 | assert_regnum (regnum); | |
1186 | ||
1187 | const char *regbuf = (const char *) register_buffer (regnum); | |
1188 | size_t size = m_descr->sizeof_register[regnum]; | |
1189 | gdb_assert (size >= offset); | |
1190 | ||
1191 | return (memcmp (buf, regbuf + offset, size - offset) == 0); | |
1192 | } | |
193cb69f | 1193 | |
515630c5 | 1194 | /* Special handling for register PC. */ |
32178cab MS |
1195 | |
1196 | CORE_ADDR | |
515630c5 | 1197 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1198 | { |
ac7936df | 1199 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1200 | |
32178cab MS |
1201 | CORE_ADDR pc_val; |
1202 | ||
61a1198a UW |
1203 | if (gdbarch_read_pc_p (gdbarch)) |
1204 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1205 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1206 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1207 | { |
61a1198a | 1208 | ULONGEST raw_val; |
123f5f96 | 1209 | |
05d1431c PA |
1210 | if (regcache_cooked_read_unsigned (regcache, |
1211 | gdbarch_pc_regnum (gdbarch), | |
1212 | &raw_val) == REG_UNAVAILABLE) | |
1213 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1214 | ||
214e098a | 1215 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1216 | } |
1217 | else | |
515630c5 UW |
1218 | internal_error (__FILE__, __LINE__, |
1219 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1220 | return pc_val; |
1221 | } | |
1222 | ||
32178cab | 1223 | void |
515630c5 | 1224 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1225 | { |
ac7936df | 1226 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1227 | |
61a1198a UW |
1228 | if (gdbarch_write_pc_p (gdbarch)) |
1229 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1230 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1231 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1232 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1233 | else |
1234 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1235 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1236 | |
1237 | /* Writing the PC (for instance, from "load") invalidates the | |
1238 | current frame. */ | |
1239 | reinit_frame_cache (); | |
32178cab MS |
1240 | } |
1241 | ||
d999647b | 1242 | int |
31716595 | 1243 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1244 | { |
1245 | return gdbarch_num_regs (arch ()); | |
1246 | } | |
1247 | ||
ed771251 | 1248 | void |
ef79d9a3 | 1249 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1250 | { |
ef79d9a3 | 1251 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1252 | |
1253 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1254 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1255 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1256 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1257 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1258 | gdbarch_register_name (gdbarch, regno)); | |
1259 | else | |
1260 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1261 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1262 | { | |
1263 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1264 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1265 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1266 | |
1267 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1268 | for (int i = 0; i < size; i++) | |
1269 | { | |
1270 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1271 | } | |
1272 | if (size <= sizeof (LONGEST)) | |
1273 | { | |
1274 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1275 | ||
1276 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1277 | core_addr_to_string_nz (val), plongest (val)); | |
1278 | } | |
1279 | } | |
1280 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1281 | } | |
32178cab | 1282 | |
705152c5 | 1283 | static void |
0b39b52e | 1284 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1285 | { |
1286 | /* Force-flush the register cache. */ | |
1287 | registers_changed (); | |
1288 | if (from_tty) | |
a3f17187 | 1289 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1290 | } |
1291 | ||
4c74fe6b YQ |
1292 | void |
1293 | register_dump::dump (ui_file *file) | |
af030b9a | 1294 | { |
4c74fe6b YQ |
1295 | auto descr = regcache_descr (m_gdbarch); |
1296 | int regnum; | |
1297 | int footnote_nr = 0; | |
1298 | int footnote_register_offset = 0; | |
1299 | int footnote_register_type_name_null = 0; | |
1300 | long register_offset = 0; | |
af030b9a | 1301 | |
4c74fe6b | 1302 | gdb_assert (descr->nr_cooked_registers |
f6efe3f8 | 1303 | == gdbarch_num_cooked_regs (m_gdbarch)); |
af030b9a | 1304 | |
4c74fe6b YQ |
1305 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1306 | { | |
1307 | /* Name. */ | |
1308 | if (regnum < 0) | |
1309 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1310 | else | |
1311 | { | |
1312 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1313 | |
4c74fe6b YQ |
1314 | if (p == NULL) |
1315 | p = ""; | |
1316 | else if (p[0] == '\0') | |
1317 | p = "''"; | |
1318 | fprintf_unfiltered (file, " %-10s", p); | |
1319 | } | |
af030b9a | 1320 | |
4c74fe6b YQ |
1321 | /* Number. */ |
1322 | if (regnum < 0) | |
1323 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1324 | else | |
1325 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1326 | |
4c74fe6b YQ |
1327 | /* Relative number. */ |
1328 | if (regnum < 0) | |
1329 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1330 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1331 | fprintf_unfiltered (file, " %4d", regnum); | |
1332 | else | |
1333 | fprintf_unfiltered (file, " %4d", | |
1334 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1335 | |
4c74fe6b YQ |
1336 | /* Offset. */ |
1337 | if (regnum < 0) | |
1338 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1339 | else | |
af030b9a | 1340 | { |
4c74fe6b YQ |
1341 | fprintf_unfiltered (file, " %6ld", |
1342 | descr->register_offset[regnum]); | |
1343 | if (register_offset != descr->register_offset[regnum] | |
1344 | || (regnum > 0 | |
1345 | && (descr->register_offset[regnum] | |
1346 | != (descr->register_offset[regnum - 1] | |
1347 | + descr->sizeof_register[regnum - 1]))) | |
1348 | ) | |
af030b9a | 1349 | { |
4c74fe6b YQ |
1350 | if (!footnote_register_offset) |
1351 | footnote_register_offset = ++footnote_nr; | |
1352 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1353 | } |
4c74fe6b YQ |
1354 | else |
1355 | fprintf_unfiltered (file, " "); | |
1356 | register_offset = (descr->register_offset[regnum] | |
1357 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1358 | } |
1359 | ||
4c74fe6b YQ |
1360 | /* Size. */ |
1361 | if (regnum < 0) | |
1362 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1363 | else | |
1364 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1365 | |
4c74fe6b | 1366 | /* Type. */ |
f3384e66 | 1367 | { |
4c74fe6b YQ |
1368 | const char *t; |
1369 | std::string name_holder; | |
b59ff9d5 | 1370 | |
4c74fe6b YQ |
1371 | if (regnum < 0) |
1372 | t = "Type"; | |
215c69dc YQ |
1373 | else |
1374 | { | |
4c74fe6b | 1375 | static const char blt[] = "builtin_type"; |
123f5f96 | 1376 | |
4c74fe6b YQ |
1377 | t = TYPE_NAME (register_type (m_gdbarch, regnum)); |
1378 | if (t == NULL) | |
f3384e66 | 1379 | { |
4c74fe6b YQ |
1380 | if (!footnote_register_type_name_null) |
1381 | footnote_register_type_name_null = ++footnote_nr; | |
1382 | name_holder = string_printf ("*%d", | |
1383 | footnote_register_type_name_null); | |
1384 | t = name_holder.c_str (); | |
f3384e66 | 1385 | } |
4c74fe6b YQ |
1386 | /* Chop a leading builtin_type. */ |
1387 | if (startswith (t, blt)) | |
1388 | t += strlen (blt); | |
f3384e66 | 1389 | } |
4c74fe6b | 1390 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1391 | } |
f3384e66 | 1392 | |
4c74fe6b YQ |
1393 | /* Leading space always present. */ |
1394 | fprintf_unfiltered (file, " "); | |
af030b9a | 1395 | |
4c74fe6b | 1396 | dump_reg (file, regnum); |
ed4227b7 | 1397 | |
4c74fe6b | 1398 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1399 | } |
1400 | ||
4c74fe6b YQ |
1401 | if (footnote_register_offset) |
1402 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1403 | footnote_register_offset); | |
1404 | if (footnote_register_type_name_null) | |
1405 | fprintf_unfiltered (file, | |
1406 | "*%d: Register type's name NULL.\n", | |
1407 | footnote_register_type_name_null); | |
c21236dc PA |
1408 | } |
1409 | ||
8248946c | 1410 | #if GDB_SELF_TEST |
268a13a5 | 1411 | #include "gdbsupport/selftest.h" |
1b30aaa5 | 1412 | #include "selftest-arch.h" |
ec7a5fcb | 1413 | #include "target-float.h" |
8248946c YQ |
1414 | |
1415 | namespace selftests { | |
1416 | ||
e521e87e | 1417 | class regcache_access : public regcache |
8248946c | 1418 | { |
e521e87e YQ |
1419 | public: |
1420 | ||
1421 | /* Return the number of elements in current_regcache. */ | |
1422 | ||
1423 | static size_t | |
1424 | current_regcache_size () | |
1425 | { | |
1426 | return std::distance (regcache::current_regcache.begin (), | |
1427 | regcache::current_regcache.end ()); | |
1428 | } | |
1429 | }; | |
8248946c | 1430 | |
5b6d1e4f PA |
1431 | /* Wrapper around get_thread_arch_aspace_regcache that does some self checks. */ |
1432 | ||
1433 | static void | |
1434 | test_get_thread_arch_aspace_regcache (process_stratum_target *target, | |
1435 | ptid_t ptid, struct gdbarch *gdbarch, | |
1436 | address_space *aspace) | |
1437 | { | |
1438 | struct regcache *regcache | |
1439 | = get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace); | |
1440 | SELF_CHECK (regcache != NULL); | |
1441 | SELF_CHECK (regcache->target () == target); | |
1442 | SELF_CHECK (regcache->ptid () == ptid); | |
1443 | SELF_CHECK (regcache->aspace () == aspace); | |
1444 | } | |
1445 | ||
8248946c YQ |
1446 | static void |
1447 | current_regcache_test (void) | |
1448 | { | |
1449 | /* It is empty at the start. */ | |
e521e87e | 1450 | SELF_CHECK (regcache_access::current_regcache_size () == 0); |
8248946c YQ |
1451 | |
1452 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1453 | ||
5b6d1e4f PA |
1454 | test_target_ops test_target1; |
1455 | test_target_ops test_target2; | |
8248946c | 1456 | |
5b6d1e4f PA |
1457 | /* Get regcache from (target1,ptid1), a new regcache is added to |
1458 | current_regcache. */ | |
1459 | test_get_thread_arch_aspace_regcache (&test_target1, ptid1, | |
1460 | target_gdbarch (), | |
1461 | NULL); | |
e521e87e | 1462 | SELF_CHECK (regcache_access::current_regcache_size () == 1); |
8248946c | 1463 | |
5b6d1e4f | 1464 | /* Get regcache from (target1,ptid2), a new regcache is added to |
8248946c | 1465 | current_regcache. */ |
5b6d1e4f PA |
1466 | test_get_thread_arch_aspace_regcache (&test_target1, ptid2, |
1467 | target_gdbarch (), | |
1468 | NULL); | |
e521e87e | 1469 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c | 1470 | |
5b6d1e4f | 1471 | /* Get regcache from (target1,ptid3), a new regcache is added to |
8248946c | 1472 | current_regcache. */ |
5b6d1e4f PA |
1473 | test_get_thread_arch_aspace_regcache (&test_target1, ptid3, |
1474 | target_gdbarch (), | |
1475 | NULL); | |
e521e87e | 1476 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c | 1477 | |
5b6d1e4f | 1478 | /* Get regcache from (target1,ptid2) again, nothing is added to |
8248946c | 1479 | current_regcache. */ |
5b6d1e4f PA |
1480 | test_get_thread_arch_aspace_regcache (&test_target1, ptid2, |
1481 | target_gdbarch (), | |
1482 | NULL); | |
e521e87e | 1483 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c | 1484 | |
5b6d1e4f PA |
1485 | /* Get regcache from (target2,ptid2), a new regcache is added to |
1486 | current_regcache, since this time we're using a differen | |
1487 | target. */ | |
1488 | test_get_thread_arch_aspace_regcache (&test_target2, ptid2, | |
1489 | target_gdbarch (), | |
1490 | NULL); | |
1491 | SELF_CHECK (regcache_access::current_regcache_size () == 4); | |
1492 | ||
1493 | /* Mark that (target1,ptid2) changed. The regcache of (target1, | |
1494 | ptid2) should be removed from current_regcache. */ | |
1495 | registers_changed_ptid (&test_target1, ptid2); | |
1496 | SELF_CHECK (regcache_access::current_regcache_size () == 3); | |
1497 | ||
1498 | /* Get the regcache from (target2,ptid2) again, confirming the | |
1499 | registers_changed_ptid call above did not delete it. */ | |
1500 | test_get_thread_arch_aspace_regcache (&test_target2, ptid2, | |
1501 | target_gdbarch (), | |
1502 | NULL); | |
1503 | SELF_CHECK (regcache_access::current_regcache_size () == 3); | |
1504 | ||
1505 | /* Confirm that marking all regcaches of all targets as changed | |
1506 | clears current_regcache. */ | |
1507 | registers_changed_ptid (nullptr, minus_one_ptid); | |
1508 | SELF_CHECK (regcache_access::current_regcache_size () == 0); | |
8248946c YQ |
1509 | } |
1510 | ||
1b30aaa5 YQ |
1511 | class target_ops_no_register : public test_target_ops |
1512 | { | |
1513 | public: | |
1514 | target_ops_no_register () | |
1515 | : test_target_ops {} | |
f6ac5f3d | 1516 | {} |
1b30aaa5 YQ |
1517 | |
1518 | void reset () | |
1519 | { | |
1520 | fetch_registers_called = 0; | |
1521 | store_registers_called = 0; | |
1522 | xfer_partial_called = 0; | |
1523 | } | |
1524 | ||
f6ac5f3d PA |
1525 | void fetch_registers (regcache *regs, int regno) override; |
1526 | void store_registers (regcache *regs, int regno) override; | |
1527 | ||
1528 | enum target_xfer_status xfer_partial (enum target_object object, | |
1529 | const char *annex, gdb_byte *readbuf, | |
1530 | const gdb_byte *writebuf, | |
1531 | ULONGEST offset, ULONGEST len, | |
1532 | ULONGEST *xfered_len) override; | |
1533 | ||
1b30aaa5 YQ |
1534 | unsigned int fetch_registers_called = 0; |
1535 | unsigned int store_registers_called = 0; | |
1536 | unsigned int xfer_partial_called = 0; | |
1537 | }; | |
1538 | ||
f6ac5f3d PA |
1539 | void |
1540 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1541 | { |
1b30aaa5 YQ |
1542 | /* Mark register available. */ |
1543 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1544 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1545 | } |
1546 | ||
f6ac5f3d PA |
1547 | void |
1548 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1549 | { |
f6ac5f3d | 1550 | this->store_registers_called++; |
1b30aaa5 YQ |
1551 | } |
1552 | ||
f6ac5f3d PA |
1553 | enum target_xfer_status |
1554 | target_ops_no_register::xfer_partial (enum target_object object, | |
1555 | const char *annex, gdb_byte *readbuf, | |
1556 | const gdb_byte *writebuf, | |
1557 | ULONGEST offset, ULONGEST len, | |
1558 | ULONGEST *xfered_len) | |
1b30aaa5 | 1559 | { |
f6ac5f3d | 1560 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1561 | |
1562 | *xfered_len = len; | |
1563 | return TARGET_XFER_OK; | |
1564 | } | |
1565 | ||
1566 | class readwrite_regcache : public regcache | |
1567 | { | |
1568 | public: | |
5b6d1e4f PA |
1569 | readwrite_regcache (process_stratum_target *target, |
1570 | struct gdbarch *gdbarch) | |
1571 | : regcache (target, gdbarch, nullptr) | |
1b30aaa5 YQ |
1572 | {} |
1573 | }; | |
1574 | ||
1575 | /* Test regcache::cooked_read gets registers from raw registers and | |
1576 | memory instead of target to_{fetch,store}_registers. */ | |
1577 | ||
1578 | static void | |
1579 | cooked_read_test (struct gdbarch *gdbarch) | |
1580 | { | |
1581 | /* Error out if debugging something, because we're going to push the | |
1582 | test target, which would pop any existing target. */ | |
66b4deae | 1583 | if (current_top_target ()->stratum () >= process_stratum) |
1b30aaa5 YQ |
1584 | error (_("target already pushed")); |
1585 | ||
1586 | /* Create a mock environment. An inferior with a thread, with a | |
1587 | process_stratum target pushed. */ | |
1588 | ||
1589 | target_ops_no_register mock_target; | |
1590 | ptid_t mock_ptid (1, 1); | |
1591 | inferior mock_inferior (mock_ptid.pid ()); | |
1592 | address_space mock_aspace {}; | |
1593 | mock_inferior.gdbarch = gdbarch; | |
1594 | mock_inferior.aspace = &mock_aspace; | |
1595 | thread_info mock_thread (&mock_inferior, mock_ptid); | |
894ecaf4 | 1596 | mock_inferior.thread_list = &mock_thread; |
1b30aaa5 | 1597 | |
1b30aaa5 YQ |
1598 | /* Add the mock inferior to the inferior list so that look ups by |
1599 | target+ptid can find it. */ | |
1600 | scoped_restore restore_inferior_list | |
1601 | = make_scoped_restore (&inferior_list); | |
1602 | inferior_list = &mock_inferior; | |
1603 | ||
1604 | /* Switch to the mock inferior. */ | |
1605 | scoped_restore_current_inferior restore_current_inferior; | |
1606 | set_current_inferior (&mock_inferior); | |
1607 | ||
1608 | /* Push the process_stratum target so we can mock accessing | |
1609 | registers. */ | |
1610 | push_target (&mock_target); | |
1611 | ||
1612 | /* Pop it again on exit (return/exception). */ | |
1613 | struct on_exit | |
1614 | { | |
1615 | ~on_exit () | |
1616 | { | |
1617 | pop_all_targets_at_and_above (process_stratum); | |
1618 | } | |
1619 | } pop_targets; | |
1620 | ||
1621 | /* Switch to the mock thread. */ | |
1622 | scoped_restore restore_inferior_ptid | |
1623 | = make_scoped_restore (&inferior_ptid, mock_ptid); | |
1624 | ||
1625 | /* Test that read one raw register from regcache_no_target will go | |
1626 | to the target layer. */ | |
1b30aaa5 YQ |
1627 | |
1628 | /* Find a raw register which size isn't zero. */ | |
b926417a TT |
1629 | int nonzero_regnum; |
1630 | for (nonzero_regnum = 0; | |
1631 | nonzero_regnum < gdbarch_num_regs (gdbarch); | |
1632 | nonzero_regnum++) | |
1b30aaa5 | 1633 | { |
b926417a | 1634 | if (register_size (gdbarch, nonzero_regnum) != 0) |
1b30aaa5 YQ |
1635 | break; |
1636 | } | |
1637 | ||
5b6d1e4f | 1638 | readwrite_regcache readwrite (&mock_target, gdbarch); |
b926417a | 1639 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, nonzero_regnum)); |
1b30aaa5 | 1640 | |
b926417a | 1641 | readwrite.raw_read (nonzero_regnum, buf.data ()); |
1b30aaa5 YQ |
1642 | |
1643 | /* raw_read calls target_fetch_registers. */ | |
1644 | SELF_CHECK (mock_target.fetch_registers_called > 0); | |
1645 | mock_target.reset (); | |
1646 | ||
1647 | /* Mark all raw registers valid, so the following raw registers | |
1648 | accesses won't go to target. */ | |
1649 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1650 | readwrite.raw_update (i); | |
1651 | ||
1652 | mock_target.reset (); | |
1653 | /* Then, read all raw and pseudo registers, and don't expect calling | |
1654 | to_{fetch,store}_registers. */ | |
f6efe3f8 | 1655 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
1b30aaa5 YQ |
1656 | { |
1657 | if (register_size (gdbarch, regnum) == 0) | |
1658 | continue; | |
1659 | ||
b926417a | 1660 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
1b30aaa5 | 1661 | |
b926417a TT |
1662 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, |
1663 | inner_buf.data ())); | |
1b30aaa5 | 1664 | |
dc711524 YQ |
1665 | SELF_CHECK (mock_target.fetch_registers_called == 0); |
1666 | SELF_CHECK (mock_target.store_registers_called == 0); | |
abf516c6 | 1667 | SELF_CHECK (mock_target.xfer_partial_called == 0); |
1b30aaa5 YQ |
1668 | |
1669 | mock_target.reset (); | |
1670 | } | |
a63f2d2f | 1671 | |
215c69dc | 1672 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1673 | |
1674 | /* GDB may go to target layer to fetch all registers and memory for | |
1675 | readonly regcache. */ | |
1676 | mock_target.reset (); | |
1677 | ||
f6efe3f8 | 1678 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
a63f2d2f | 1679 | { |
a63f2d2f YQ |
1680 | if (register_size (gdbarch, regnum) == 0) |
1681 | continue; | |
1682 | ||
b926417a | 1683 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
a63f2d2f | 1684 | enum register_status status = readonly.cooked_read (regnum, |
b926417a | 1685 | inner_buf.data ()); |
a63f2d2f YQ |
1686 | |
1687 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1688 | { | |
1689 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1690 | ||
1691 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1692 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1693 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1694 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1695 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1696 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 | 1697 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
bea556ab | 1698 | || bfd_arch == bfd_arch_riscv || bfd_arch == bfd_arch_csky) |
a63f2d2f YQ |
1699 | { |
1700 | /* Raw registers. If raw registers are not in save_reggroup, | |
1701 | their status are unknown. */ | |
1702 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1703 | SELF_CHECK (status == REG_VALID); | |
1704 | else | |
1705 | SELF_CHECK (status == REG_UNKNOWN); | |
1706 | } | |
1707 | else | |
1708 | SELF_CHECK (status == REG_VALID); | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1713 | SELF_CHECK (status == REG_VALID); | |
1714 | else | |
1715 | { | |
1716 | /* If pseudo registers are not in save_reggroup, some of | |
1717 | them can be computed from saved raw registers, but some | |
1718 | of them are unknown. */ | |
1719 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1720 | ||
1721 | if (bfd_arch == bfd_arch_frv | |
1722 | || bfd_arch == bfd_arch_m32c | |
1723 | || bfd_arch == bfd_arch_mep | |
1724 | || bfd_arch == bfd_arch_sh) | |
1725 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1726 | else if (bfd_arch == bfd_arch_mips | |
1727 | || bfd_arch == bfd_arch_h8300) | |
1728 | SELF_CHECK (status == REG_UNKNOWN); | |
1729 | else | |
1730 | SELF_CHECK (status == REG_VALID); | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | SELF_CHECK (mock_target.fetch_registers_called == 0); | |
1735 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1736 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1737 | ||
1738 | mock_target.reset (); | |
1739 | } | |
1b30aaa5 YQ |
1740 | } |
1741 | ||
ec7a5fcb YQ |
1742 | /* Test regcache::cooked_write by writing some expected contents to |
1743 | registers, and checking that contents read from registers and the | |
1744 | expected contents are the same. */ | |
1745 | ||
1746 | static void | |
1747 | cooked_write_test (struct gdbarch *gdbarch) | |
1748 | { | |
1749 | /* Error out if debugging something, because we're going to push the | |
1750 | test target, which would pop any existing target. */ | |
66b4deae | 1751 | if (current_top_target ()->stratum () >= process_stratum) |
ec7a5fcb YQ |
1752 | error (_("target already pushed")); |
1753 | ||
1754 | /* Create a mock environment. A process_stratum target pushed. */ | |
1755 | ||
1756 | target_ops_no_register mock_target; | |
1757 | ||
1758 | /* Push the process_stratum target so we can mock accessing | |
1759 | registers. */ | |
1760 | push_target (&mock_target); | |
1761 | ||
1762 | /* Pop it again on exit (return/exception). */ | |
1763 | struct on_exit | |
1764 | { | |
1765 | ~on_exit () | |
1766 | { | |
1767 | pop_all_targets_at_and_above (process_stratum); | |
1768 | } | |
1769 | } pop_targets; | |
1770 | ||
5b6d1e4f | 1771 | readwrite_regcache readwrite (&mock_target, gdbarch); |
ec7a5fcb | 1772 | |
f6efe3f8 | 1773 | const int num_regs = gdbarch_num_cooked_regs (gdbarch); |
ec7a5fcb YQ |
1774 | |
1775 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1776 | { | |
1777 | if (register_size (gdbarch, regnum) == 0 | |
1778 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1779 | continue; | |
1780 | ||
1781 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1782 | ||
abf516c6 UW |
1783 | if (bfd_arch == bfd_arch_sparc |
1784 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1785 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1786 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1787 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1788 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1789 | continue; |
1790 | ||
1791 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1792 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1793 | const auto type = register_type (gdbarch, regnum); | |
1794 | ||
1795 | if (TYPE_CODE (type) == TYPE_CODE_FLT | |
1796 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
1797 | { | |
1798 | /* Generate valid float format. */ | |
1799 | target_float_from_string (expected.data (), type, "1.25"); | |
1800 | } | |
1801 | else if (TYPE_CODE (type) == TYPE_CODE_INT | |
1802 | || TYPE_CODE (type) == TYPE_CODE_ARRAY | |
1803 | || TYPE_CODE (type) == TYPE_CODE_PTR | |
1804 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
1805 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
1806 | { | |
1807 | if (bfd_arch == bfd_arch_ia64 | |
1808 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1809 | && (bfd_arch == bfd_arch_xtensa | |
1810 | || bfd_arch == bfd_arch_bfin | |
1811 | || bfd_arch == bfd_arch_m32c | |
1812 | /* m68hc11 pseudo registers are in memory. */ | |
1813 | || bfd_arch == bfd_arch_m68hc11 | |
1814 | || bfd_arch == bfd_arch_m68hc12 | |
1815 | || bfd_arch == bfd_arch_s390)) | |
1816 | || (bfd_arch == bfd_arch_frv | |
1817 | /* FRV pseudo registers except iacc0. */ | |
1818 | && regnum > gdbarch_num_regs (gdbarch))) | |
1819 | { | |
1820 | /* Skip setting the expected values for some architecture | |
1821 | registers. */ | |
1822 | } | |
1823 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1824 | { | |
1825 | /* RL78_PC_REGNUM */ | |
1826 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1827 | expected[j] = j; | |
1828 | } | |
1829 | else | |
1830 | { | |
1831 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1832 | expected[j] = j; | |
1833 | } | |
1834 | } | |
1835 | else if (TYPE_CODE (type) == TYPE_CODE_FLAGS) | |
1836 | { | |
1837 | /* No idea how to test flags. */ | |
1838 | continue; | |
1839 | } | |
1840 | else | |
1841 | { | |
1842 | /* If we don't know how to create the expected value for the | |
1843 | this type, make it fail. */ | |
1844 | SELF_CHECK (0); | |
1845 | } | |
1846 | ||
1847 | readwrite.cooked_write (regnum, expected.data ()); | |
1848 | ||
1849 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1850 | SELF_CHECK (expected == buf); | |
1851 | } | |
1852 | } | |
1853 | ||
8248946c YQ |
1854 | } // namespace selftests |
1855 | #endif /* GDB_SELF_TEST */ | |
1856 | ||
6c265988 | 1857 | void _initialize_regcache (); |
32178cab | 1858 | void |
6c265988 | 1859 | _initialize_regcache () |
32178cab | 1860 | { |
3e43a32a MS |
1861 | regcache_descr_handle |
1862 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1863 | |
76727919 TT |
1864 | gdb::observers::target_changed.attach (regcache_observer_target_changed); |
1865 | gdb::observers::thread_ptid_changed.attach | |
1866 | (regcache::regcache_thread_ptid_changed); | |
f4c5303c | 1867 | |
705152c5 | 1868 | add_com ("flushregs", class_maintenance, reg_flush_command, |
590042fc | 1869 | _("Force gdb to flush its register cache (maintainer command).")); |
39f77062 | 1870 | |
8248946c | 1871 | #if GDB_SELF_TEST |
1526853e | 1872 | selftests::register_test ("current_regcache", selftests::current_regcache_test); |
1b30aaa5 YQ |
1873 | |
1874 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1875 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1876 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1877 | selftests::cooked_write_test); | |
8248946c | 1878 | #endif |
32178cab | 1879 | } |