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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
4a94e368 | 3 | Copyright (C) 1986-2022 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" |
888bdb2b | 32 | #include <unordered_map> |
50a5f187 | 33 | #include "cli/cli-cmds.h" |
32178cab MS |
34 | |
35 | /* | |
36 | * DATA STRUCTURE | |
37 | * | |
38 | * Here is the actual register cache. | |
39 | */ | |
40 | ||
3fadccb3 | 41 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 42 | Computed once when the architecture is created. */ |
3fadccb3 | 43 | |
3fadccb3 AC |
44 | struct regcache_descr |
45 | { | |
46 | /* The architecture this descriptor belongs to. */ | |
cb275538 | 47 | struct gdbarch *gdbarch = nullptr; |
3fadccb3 | 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. */ |
cb275538 | 54 | long sizeof_raw_registers = 0; |
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. */ |
cb275538 TT |
62 | int nr_cooked_registers = 0; |
63 | long sizeof_cooked_registers = 0; | |
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. */ | |
cb275538 TT |
69 | long *register_offset = nullptr; |
70 | long *sizeof_register = nullptr; | |
3fadccb3 | 71 | |
bb425013 | 72 | /* Cached table containing the type of each register. */ |
cb275538 | 73 | struct type **register_type = nullptr; |
3fadccb3 AC |
74 | }; |
75 | ||
cb275538 TT |
76 | static const registry<gdbarch>::key<struct regcache_descr> |
77 | regcache_descr_handle; | |
78 | ||
79 | static struct regcache_descr * | |
3fadccb3 AC |
80 | init_regcache_descr (struct gdbarch *gdbarch) |
81 | { | |
82 | int i; | |
83 | struct regcache_descr *descr; | |
84 | gdb_assert (gdbarch != NULL); | |
85 | ||
bb425013 | 86 | /* Create an initial, zero filled, table. */ |
cb275538 | 87 | descr = new struct regcache_descr; |
3fadccb3 | 88 | descr->gdbarch = gdbarch; |
3fadccb3 | 89 | |
d138e37a AC |
90 | /* Total size of the register space. The raw registers are mapped |
91 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 92 | either mapped onto raw-registers or memory. */ |
f6efe3f8 | 93 | descr->nr_cooked_registers = gdbarch_num_cooked_regs (gdbarch); |
3fadccb3 | 94 | |
bb425013 | 95 | /* Fill in a table of register types. */ |
116f06ea | 96 | descr->register_type |
3e43a32a MS |
97 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
98 | struct type *); | |
bb425013 | 99 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 100 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 101 | |
bb1db049 AC |
102 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
103 | into the register cache. */ | |
bb1db049 | 104 | |
067df2e5 | 105 | /* Lay out the register cache. |
3fadccb3 | 106 | |
78134374 | 107 | NOTE: cagney/2002-05-22: Only register_type () is used when |
bb425013 AC |
108 | constructing the register cache. It is assumed that the |
109 | register's raw size, virtual size and type length are all the | |
110 | same. */ | |
3fadccb3 AC |
111 | |
112 | { | |
113 | long offset = 0; | |
123f5f96 | 114 | |
116f06ea AC |
115 | descr->sizeof_register |
116 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
117 | descr->register_offset | |
118 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
d999647b | 119 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
99e42fd8 | 120 | { |
df86565b | 121 | descr->sizeof_register[i] = descr->register_type[i]->length (); |
99e42fd8 PA |
122 | descr->register_offset[i] = offset; |
123 | offset += descr->sizeof_register[i]; | |
99e42fd8 PA |
124 | } |
125 | /* Set the real size of the raw register cache buffer. */ | |
126 | descr->sizeof_raw_registers = offset; | |
127 | ||
128 | for (; i < descr->nr_cooked_registers; i++) | |
3fadccb3 | 129 | { |
df86565b | 130 | descr->sizeof_register[i] = descr->register_type[i]->length (); |
3fadccb3 AC |
131 | descr->register_offset[i] = offset; |
132 | offset += descr->sizeof_register[i]; | |
3fadccb3 | 133 | } |
99e42fd8 | 134 | /* Set the real size of the readonly register cache buffer. */ |
067df2e5 | 135 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
136 | } |
137 | ||
3fadccb3 AC |
138 | return descr; |
139 | } | |
140 | ||
141 | static struct regcache_descr * | |
142 | regcache_descr (struct gdbarch *gdbarch) | |
143 | { | |
cb275538 TT |
144 | struct regcache_descr *result = regcache_descr_handle.get (gdbarch); |
145 | if (result == nullptr) | |
146 | { | |
147 | result = init_regcache_descr (gdbarch); | |
148 | regcache_descr_handle.set (gdbarch, result); | |
149 | } | |
150 | ||
151 | return result; | |
3fadccb3 AC |
152 | } |
153 | ||
bb425013 AC |
154 | /* Utility functions returning useful register attributes stored in |
155 | the regcache descr. */ | |
156 | ||
157 | struct type * | |
158 | register_type (struct gdbarch *gdbarch, int regnum) | |
159 | { | |
160 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
123f5f96 | 161 | |
bb425013 AC |
162 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
163 | return descr->register_type[regnum]; | |
164 | } | |
165 | ||
0ed04cce AC |
166 | /* Utility functions returning useful register attributes stored in |
167 | the regcache descr. */ | |
168 | ||
08a617da AC |
169 | int |
170 | register_size (struct gdbarch *gdbarch, int regnum) | |
171 | { | |
172 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
173 | int size; | |
123f5f96 | 174 | |
f6efe3f8 | 175 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_cooked_regs (gdbarch)); |
08a617da | 176 | size = descr->sizeof_register[regnum]; |
08a617da AC |
177 | return size; |
178 | } | |
179 | ||
268a13a5 | 180 | /* See gdbsupport/common-regcache.h. */ |
8d689ee5 YQ |
181 | |
182 | int | |
183 | regcache_register_size (const struct regcache *regcache, int n) | |
184 | { | |
ac7936df | 185 | return register_size (regcache->arch (), n); |
8d689ee5 YQ |
186 | } |
187 | ||
31716595 YQ |
188 | reg_buffer::reg_buffer (gdbarch *gdbarch, bool has_pseudo) |
189 | : m_has_pseudo (has_pseudo) | |
3fadccb3 | 190 | { |
ef79d9a3 YQ |
191 | gdb_assert (gdbarch != NULL); |
192 | m_descr = regcache_descr (gdbarch); | |
4621115f | 193 | |
11bb5c41 SM |
194 | /* We don't zero-initialize the M_REGISTERS array, as the bytes it contains |
195 | aren't meaningful as long as the corresponding register status is not | |
196 | REG_VALID. */ | |
31716595 | 197 | if (has_pseudo) |
4621115f | 198 | { |
11bb5c41 | 199 | m_registers.reset (new gdb_byte[m_descr->sizeof_cooked_registers]); |
835dcf92 SM |
200 | m_register_status.reset |
201 | (new register_status[m_descr->nr_cooked_registers] ()); | |
4621115f YQ |
202 | } |
203 | else | |
204 | { | |
11bb5c41 | 205 | m_registers.reset (new gdb_byte[m_descr->sizeof_raw_registers]); |
835dcf92 SM |
206 | m_register_status.reset |
207 | (new register_status[gdbarch_num_regs (gdbarch)] ()); | |
4621115f | 208 | } |
31716595 YQ |
209 | } |
210 | ||
5b6d1e4f PA |
211 | regcache::regcache (process_stratum_target *target, gdbarch *gdbarch, |
212 | const address_space *aspace_) | |
796bb026 YQ |
213 | /* The register buffers. A read/write register cache can only hold |
214 | [0 .. gdbarch_num_regs). */ | |
5b6d1e4f | 215 | : detached_regcache (gdbarch, false), m_aspace (aspace_), m_target (target) |
31716595 | 216 | { |
ef79d9a3 YQ |
217 | m_ptid = minus_one_ptid; |
218 | } | |
4621115f | 219 | |
302abd6e SM |
220 | readonly_detached_regcache::readonly_detached_regcache (regcache &src) |
221 | : readonly_detached_regcache (src.arch (), | |
222 | [&src] (int regnum, gdb_byte *buf) | |
223 | { | |
224 | return src.cooked_read (regnum, buf); | |
225 | }) | |
daf6667d YQ |
226 | { |
227 | } | |
228 | ||
ef79d9a3 | 229 | gdbarch * |
31716595 | 230 | reg_buffer::arch () const |
ef79d9a3 YQ |
231 | { |
232 | return m_descr->gdbarch; | |
233 | } | |
3fadccb3 | 234 | |
51b1fe4e AC |
235 | /* Return a pointer to register REGNUM's buffer cache. */ |
236 | ||
ef79d9a3 | 237 | gdb_byte * |
31716595 | 238 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 239 | { |
835dcf92 | 240 | return m_registers.get () + m_descr->register_offset[regnum]; |
51b1fe4e AC |
241 | } |
242 | ||
ef79d9a3 | 243 | void |
302abd6e | 244 | reg_buffer::save (register_read_ftype cooked_read) |
ef79d9a3 YQ |
245 | { |
246 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 247 | int regnum; |
123f5f96 | 248 | |
daf6667d YQ |
249 | /* It should have pseudo registers. */ |
250 | gdb_assert (m_has_pseudo); | |
2d28509a | 251 | /* Clear the dest. */ |
835dcf92 SM |
252 | memset (m_registers.get (), 0, m_descr->sizeof_cooked_registers); |
253 | memset (m_register_status.get (), REG_UNKNOWN, m_descr->nr_cooked_registers); | |
2d28509a | 254 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
255 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
256 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 257 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 258 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
259 | { |
260 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
261 | { | |
50d6adef | 262 | gdb_byte *dst_buf = register_buffer (regnum); |
302abd6e | 263 | enum register_status status = cooked_read (regnum, dst_buf); |
123f5f96 | 264 | |
50d6adef AH |
265 | gdb_assert (status != REG_UNKNOWN); |
266 | ||
267 | if (status != REG_VALID) | |
268 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 269 | |
ef79d9a3 | 270 | m_register_status[regnum] = status; |
2d28509a AC |
271 | } |
272 | } | |
273 | } | |
274 | ||
ef79d9a3 | 275 | void |
daf6667d | 276 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 277 | { |
ef79d9a3 | 278 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 279 | int regnum; |
123f5f96 | 280 | |
fc5b8736 | 281 | gdb_assert (src != NULL); |
daf6667d | 282 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
283 | |
284 | gdb_assert (gdbarch == src->arch ()); | |
285 | ||
2d28509a | 286 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
287 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
288 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 289 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 290 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 291 | { |
5602984a | 292 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 293 | { |
ef79d9a3 YQ |
294 | if (src->m_register_status[regnum] == REG_VALID) |
295 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
296 | } |
297 | } | |
298 | } | |
299 | ||
268a13a5 | 300 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 301 | |
ef79d9a3 | 302 | enum register_status |
c8ec2f33 | 303 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 304 | { |
c8ec2f33 | 305 | assert_regnum (regnum); |
6ed7ea50 | 306 | |
aac0d564 | 307 | return m_register_status[regnum]; |
3fadccb3 AC |
308 | } |
309 | ||
ef79d9a3 | 310 | void |
9c861883 | 311 | reg_buffer::invalidate (int regnum) |
ef79d9a3 | 312 | { |
4e888c28 | 313 | assert_regnum (regnum); |
ef79d9a3 YQ |
314 | m_register_status[regnum] = REG_UNKNOWN; |
315 | } | |
9c5ea4d9 | 316 | |
4e888c28 | 317 | void |
31716595 | 318 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 319 | { |
31716595 YQ |
320 | gdb_assert (regnum >= 0); |
321 | if (m_has_pseudo) | |
322 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
323 | else | |
324 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
325 | } |
326 | ||
888bdb2b SM |
327 | /* Type to map a ptid to a list of regcaches (one thread may have multiple |
328 | regcaches, associated to different gdbarches). */ | |
329 | ||
330 | using ptid_regcache_map | |
331 | = std::unordered_multimap<ptid_t, regcache_up, hash_ptid>; | |
332 | ||
b70e516e | 333 | /* Type holding regcaches for a given pid. */ |
888bdb2b | 334 | |
b70e516e SM |
335 | using pid_ptid_regcache_map = std::unordered_map<int, ptid_regcache_map>; |
336 | ||
337 | /* Type holding regcaches for a given target. */ | |
338 | ||
339 | using target_pid_ptid_regcache_map | |
340 | = std::unordered_map<process_stratum_target *, pid_ptid_regcache_map>; | |
888bdb2b SM |
341 | |
342 | /* Global structure containing the existing regcaches. */ | |
3fadccb3 | 343 | |
5ebd2499 | 344 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
345 | recording if the register values have been changed (eg. by the |
346 | user). Therefore all registers must be written back to the | |
347 | target when appropriate. */ | |
b70e516e | 348 | static target_pid_ptid_regcache_map regcaches; |
c2250ad1 UW |
349 | |
350 | struct regcache * | |
5b6d1e4f | 351 | get_thread_arch_aspace_regcache (process_stratum_target *target, |
888bdb2b | 352 | ptid_t ptid, gdbarch *arch, |
e2d96639 | 353 | struct address_space *aspace) |
c2250ad1 | 354 | { |
5b6d1e4f PA |
355 | gdb_assert (target != nullptr); |
356 | ||
b70e516e SM |
357 | /* Find the map for this target. */ |
358 | pid_ptid_regcache_map &pid_ptid_regc_map = regcaches[target]; | |
359 | ||
360 | /* Find the map for this pid. */ | |
361 | ptid_regcache_map &ptid_regc_map = pid_ptid_regc_map[ptid.pid ()]; | |
594f7785 | 362 | |
888bdb2b SM |
363 | /* Check first if a regcache for this arch already exists. */ |
364 | auto range = ptid_regc_map.equal_range (ptid); | |
365 | for (auto it = range.first; it != range.second; ++it) | |
366 | { | |
367 | if (it->second->arch () == arch) | |
368 | return it->second.get (); | |
369 | } | |
594f7785 | 370 | |
888bdb2b SM |
371 | /* It does not exist, create it. */ |
372 | regcache *new_regcache = new regcache (target, arch, aspace); | |
ef79d9a3 | 373 | new_regcache->set_ptid (ptid); |
38f8aa06 TV |
374 | /* Work around a problem with g++ 4.8 (PR96537): Call the regcache_up |
375 | constructor explictly instead of implicitly. */ | |
376 | ptid_regc_map.insert (std::make_pair (ptid, regcache_up (new_regcache))); | |
e2d96639 | 377 | |
e2d96639 YQ |
378 | return new_regcache; |
379 | } | |
380 | ||
381 | struct regcache * | |
5b6d1e4f PA |
382 | get_thread_arch_regcache (process_stratum_target *target, ptid_t ptid, |
383 | struct gdbarch *gdbarch) | |
e2d96639 | 384 | { |
5b6d1e4f PA |
385 | scoped_restore_current_inferior restore_current_inferior; |
386 | set_current_inferior (find_inferior_ptid (target, ptid)); | |
ed4227b7 | 387 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 388 | |
5b6d1e4f | 389 | return get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace); |
594f7785 UW |
390 | } |
391 | ||
5b6d1e4f | 392 | static process_stratum_target *current_thread_target; |
c2250ad1 UW |
393 | static ptid_t current_thread_ptid; |
394 | static struct gdbarch *current_thread_arch; | |
395 | ||
396 | struct regcache * | |
5b6d1e4f | 397 | get_thread_regcache (process_stratum_target *target, ptid_t ptid) |
c2250ad1 | 398 | { |
5b6d1e4f PA |
399 | if (!current_thread_arch |
400 | || target != current_thread_target | |
401 | || current_thread_ptid != ptid) | |
c2250ad1 | 402 | { |
5b6d1e4f PA |
403 | gdb_assert (ptid != null_ptid); |
404 | ||
c2250ad1 | 405 | current_thread_ptid = ptid; |
5b6d1e4f PA |
406 | current_thread_target = target; |
407 | ||
408 | scoped_restore_current_inferior restore_current_inferior; | |
409 | set_current_inferior (find_inferior_ptid (target, ptid)); | |
c2250ad1 UW |
410 | current_thread_arch = target_thread_architecture (ptid); |
411 | } | |
412 | ||
5b6d1e4f | 413 | return get_thread_arch_regcache (target, ptid, current_thread_arch); |
c2250ad1 UW |
414 | } |
415 | ||
00431a78 PA |
416 | /* See regcache.h. */ |
417 | ||
418 | struct regcache * | |
419 | get_thread_regcache (thread_info *thread) | |
420 | { | |
5b6d1e4f PA |
421 | return get_thread_regcache (thread->inf->process_target (), |
422 | thread->ptid); | |
00431a78 PA |
423 | } |
424 | ||
c2250ad1 UW |
425 | struct regcache * |
426 | get_current_regcache (void) | |
594f7785 | 427 | { |
00431a78 | 428 | return get_thread_regcache (inferior_thread ()); |
594f7785 | 429 | } |
32178cab | 430 | |
268a13a5 | 431 | /* See gdbsupport/common-regcache.h. */ |
361c8ade GB |
432 | |
433 | struct regcache * | |
434 | get_thread_regcache_for_ptid (ptid_t ptid) | |
435 | { | |
5b6d1e4f PA |
436 | /* This function doesn't take a process_stratum_target parameter |
437 | because it's a gdbsupport/ routine implemented by both gdb and | |
438 | gdbserver. It always refers to a ptid of the current target. */ | |
439 | process_stratum_target *proc_target = current_inferior ()->process_target (); | |
440 | return get_thread_regcache (proc_target, ptid); | |
361c8ade | 441 | } |
32178cab | 442 | |
f4c5303c OF |
443 | /* Observer for the target_changed event. */ |
444 | ||
2c0b251b | 445 | static void |
f4c5303c OF |
446 | regcache_observer_target_changed (struct target_ops *target) |
447 | { | |
448 | registers_changed (); | |
449 | } | |
450 | ||
159ed7d9 SM |
451 | /* Update regcaches related to OLD_PTID to now use NEW_PTID. */ |
452 | static void | |
b161a60d SM |
453 | regcache_thread_ptid_changed (process_stratum_target *target, |
454 | ptid_t old_ptid, ptid_t new_ptid) | |
5231c1fd | 455 | { |
b70e516e SM |
456 | /* Look up map for target. */ |
457 | auto pid_ptid_regc_map_it = regcaches.find (target); | |
458 | if (pid_ptid_regc_map_it == regcaches.end ()) | |
459 | return; | |
888bdb2b | 460 | |
b70e516e SM |
461 | /* Look up map for pid. */ |
462 | pid_ptid_regcache_map &pid_ptid_regc_map = pid_ptid_regc_map_it->second; | |
463 | auto ptid_regc_map_it = pid_ptid_regc_map.find (old_ptid.pid ()); | |
464 | if (ptid_regc_map_it == pid_ptid_regc_map.end ()) | |
888bdb2b SM |
465 | return; |
466 | ||
b70e516e SM |
467 | /* Update all regcaches belonging to old_ptid. */ |
468 | ptid_regcache_map &ptid_regc_map = ptid_regc_map_it->second; | |
888bdb2b SM |
469 | auto range = ptid_regc_map.equal_range (old_ptid); |
470 | for (auto it = range.first; it != range.second;) | |
94bb8dfe | 471 | { |
888bdb2b SM |
472 | regcache_up rc = std::move (it->second); |
473 | rc->set_ptid (new_ptid); | |
474 | ||
475 | /* Remove old before inserting new, to avoid rehashing, | |
476 | which would invalidate iterators. */ | |
477 | it = ptid_regc_map.erase (it); | |
478 | ptid_regc_map.insert (std::make_pair (new_ptid, std::move (rc))); | |
94bb8dfe | 479 | } |
5231c1fd PA |
480 | } |
481 | ||
32178cab MS |
482 | /* Low level examining and depositing of registers. |
483 | ||
484 | The caller is responsible for making sure that the inferior is | |
485 | stopped before calling the fetching routines, or it will get | |
486 | garbage. (a change from GDB version 3, in which the caller got the | |
487 | value from the last stop). */ | |
488 | ||
489 | /* REGISTERS_CHANGED () | |
490 | ||
491 | Indicate that registers may have changed, so invalidate the cache. */ | |
492 | ||
493 | void | |
5b6d1e4f | 494 | registers_changed_ptid (process_stratum_target *target, ptid_t ptid) |
32178cab | 495 | { |
888bdb2b SM |
496 | if (target == nullptr) |
497 | { | |
498 | /* Since there can be ptid clashes between targets, it's not valid to | |
499 | pass a ptid without saying to which target it belongs. */ | |
500 | gdb_assert (ptid == minus_one_ptid); | |
501 | ||
502 | /* Delete all the regcaches of all targets. */ | |
503 | regcaches.clear (); | |
504 | } | |
b70e516e SM |
505 | else if (ptid.is_pid ()) |
506 | { | |
507 | /* Non-NULL target and pid ptid, delete all regcaches belonging | |
508 | to this (TARGET, PID). */ | |
509 | ||
510 | /* Look up map for target. */ | |
511 | auto pid_ptid_regc_map_it = regcaches.find (target); | |
512 | if (pid_ptid_regc_map_it != regcaches.end ()) | |
513 | { | |
514 | pid_ptid_regcache_map &pid_ptid_regc_map | |
515 | = pid_ptid_regc_map_it->second; | |
516 | ||
517 | pid_ptid_regc_map.erase (ptid.pid ()); | |
518 | } | |
519 | } | |
888bdb2b | 520 | else if (ptid != minus_one_ptid) |
c2250ad1 | 521 | { |
888bdb2b | 522 | /* Non-NULL target and non-minus_one_ptid, delete all regcaches belonging |
b70e516e SM |
523 | to this (TARGET, PTID). */ |
524 | ||
525 | /* Look up map for target. */ | |
526 | auto pid_ptid_regc_map_it = regcaches.find (target); | |
527 | if (pid_ptid_regc_map_it != regcaches.end ()) | |
e66408ed | 528 | { |
b70e516e SM |
529 | pid_ptid_regcache_map &pid_ptid_regc_map |
530 | = pid_ptid_regc_map_it->second; | |
531 | ||
532 | /* Look up map for pid. */ | |
533 | auto ptid_regc_map_it | |
534 | = pid_ptid_regc_map.find (ptid.pid ()); | |
535 | if (ptid_regc_map_it != pid_ptid_regc_map.end ()) | |
536 | { | |
537 | ptid_regcache_map &ptid_regc_map | |
538 | = ptid_regc_map_it->second; | |
539 | ||
540 | ptid_regc_map.erase (ptid); | |
541 | } | |
e66408ed | 542 | } |
888bdb2b SM |
543 | } |
544 | else | |
545 | { | |
546 | /* Non-NULL target and minus_one_ptid, delete all regcaches | |
547 | associated to this target. */ | |
548 | regcaches.erase (target); | |
c2250ad1 | 549 | } |
32178cab | 550 | |
5b6d1e4f PA |
551 | if ((target == nullptr || current_thread_target == target) |
552 | && current_thread_ptid.matches (ptid)) | |
041274d8 | 553 | { |
5b6d1e4f | 554 | current_thread_target = NULL; |
041274d8 PA |
555 | current_thread_ptid = null_ptid; |
556 | current_thread_arch = NULL; | |
557 | } | |
32178cab | 558 | |
5b6d1e4f PA |
559 | if ((target == nullptr || current_inferior ()->process_target () == target) |
560 | && inferior_ptid.matches (ptid)) | |
041274d8 PA |
561 | { |
562 | /* We just deleted the regcache of the current thread. Need to | |
563 | forget about any frames we have cached, too. */ | |
564 | reinit_frame_cache (); | |
565 | } | |
566 | } | |
c2250ad1 | 567 | |
00431a78 PA |
568 | /* See regcache.h. */ |
569 | ||
570 | void | |
571 | registers_changed_thread (thread_info *thread) | |
572 | { | |
5b6d1e4f | 573 | registers_changed_ptid (thread->inf->process_target (), thread->ptid); |
00431a78 PA |
574 | } |
575 | ||
041274d8 PA |
576 | void |
577 | registers_changed (void) | |
578 | { | |
5b6d1e4f | 579 | registers_changed_ptid (nullptr, minus_one_ptid); |
32178cab MS |
580 | } |
581 | ||
ef79d9a3 YQ |
582 | void |
583 | regcache::raw_update (int regnum) | |
584 | { | |
4e888c28 | 585 | assert_regnum (regnum); |
8e368124 | 586 | |
3fadccb3 AC |
587 | /* Make certain that the register cache is up-to-date with respect |
588 | to the current thread. This switching shouldn't be necessary | |
589 | only there is still only one target side register cache. Sigh! | |
590 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 591 | |
796bb026 | 592 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 593 | { |
ef79d9a3 | 594 | target_fetch_registers (this, regnum); |
788c8b10 PA |
595 | |
596 | /* A number of targets can't access the whole set of raw | |
597 | registers (because the debug API provides no means to get at | |
598 | them). */ | |
ef79d9a3 YQ |
599 | if (m_register_status[regnum] == REG_UNKNOWN) |
600 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 601 | } |
8e368124 AH |
602 | } |
603 | ||
ef79d9a3 | 604 | enum register_status |
849d0ba8 | 605 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
606 | { |
607 | gdb_assert (buf != NULL); | |
ef79d9a3 | 608 | raw_update (regnum); |
05d1431c | 609 | |
ef79d9a3 YQ |
610 | if (m_register_status[regnum] != REG_VALID) |
611 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 612 | else |
ef79d9a3 YQ |
613 | memcpy (buf, register_buffer (regnum), |
614 | m_descr->sizeof_register[regnum]); | |
05d1431c | 615 | |
aac0d564 | 616 | return m_register_status[regnum]; |
61a0eb5b AC |
617 | } |
618 | ||
05d1431c | 619 | enum register_status |
28fc6740 | 620 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
621 | { |
622 | gdb_assert (regcache != NULL); | |
6f98355c | 623 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
624 | } |
625 | ||
6f98355c | 626 | template<typename T, typename> |
ef79d9a3 | 627 | enum register_status |
849d0ba8 | 628 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 629 | { |
4e888c28 | 630 | assert_regnum (regnum); |
2a50938a SM |
631 | size_t len = m_descr->sizeof_register[regnum]; |
632 | gdb_byte *buf = (gdb_byte *) alloca (len); | |
633 | register_status status = raw_read (regnum, buf); | |
05d1431c | 634 | if (status == REG_VALID) |
2a50938a | 635 | *val = extract_integer<T> ({buf, len}, |
6f98355c | 636 | gdbarch_byte_order (m_descr->gdbarch)); |
05d1431c PA |
637 | else |
638 | *val = 0; | |
639 | return status; | |
28fc6740 AC |
640 | } |
641 | ||
05d1431c | 642 | enum register_status |
28fc6740 AC |
643 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
644 | ULONGEST *val) | |
ef79d9a3 YQ |
645 | { |
646 | gdb_assert (regcache != NULL); | |
6f98355c | 647 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
648 | } |
649 | ||
c00dcbe9 MK |
650 | void |
651 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
652 | { |
653 | gdb_assert (regcache != NULL); | |
6f98355c | 654 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
655 | } |
656 | ||
6f98355c | 657 | template<typename T, typename> |
ef79d9a3 | 658 | void |
6f98355c | 659 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 660 | { |
7c543f7b | 661 | gdb_byte *buf; |
123f5f96 | 662 | |
4e888c28 | 663 | assert_regnum (regnum); |
ef79d9a3 | 664 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
665 | store_integer (buf, m_descr->sizeof_register[regnum], |
666 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 667 | raw_write (regnum, buf); |
c00dcbe9 MK |
668 | } |
669 | ||
670 | void | |
671 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
672 | ULONGEST val) | |
ef79d9a3 YQ |
673 | { |
674 | gdb_assert (regcache != NULL); | |
6f98355c | 675 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
676 | } |
677 | ||
9fd15b2e YQ |
678 | LONGEST |
679 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
680 | { | |
681 | LONGEST value; | |
682 | enum register_status status; | |
683 | ||
684 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
685 | if (status == REG_UNAVAILABLE) | |
686 | throw_error (NOT_AVAILABLE_ERROR, | |
687 | _("Register %d is not available"), regnum); | |
688 | return value; | |
689 | } | |
690 | ||
ef79d9a3 | 691 | enum register_status |
849d0ba8 | 692 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 693 | { |
d138e37a | 694 | gdb_assert (regnum >= 0); |
ef79d9a3 | 695 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 696 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 697 | return raw_read (regnum, buf); |
849d0ba8 | 698 | else if (m_has_pseudo |
ef79d9a3 | 699 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 700 | { |
ef79d9a3 YQ |
701 | if (m_register_status[regnum] == REG_VALID) |
702 | memcpy (buf, register_buffer (regnum), | |
703 | m_descr->sizeof_register[regnum]); | |
05d1431c | 704 | else |
ef79d9a3 | 705 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 706 | |
aac0d564 | 707 | return m_register_status[regnum]; |
05d1431c | 708 | } |
ef79d9a3 | 709 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
710 | { |
711 | struct value *mark, *computed; | |
712 | enum register_status result = REG_VALID; | |
713 | ||
714 | mark = value_mark (); | |
715 | ||
ef79d9a3 YQ |
716 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
717 | this, regnum); | |
3543a589 | 718 | if (value_entirely_available (computed)) |
50888e42 | 719 | memcpy (buf, value_contents_raw (computed).data (), |
ef79d9a3 | 720 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
721 | else |
722 | { | |
ef79d9a3 | 723 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
724 | result = REG_UNAVAILABLE; |
725 | } | |
726 | ||
727 | value_free_to_mark (mark); | |
728 | ||
729 | return result; | |
730 | } | |
d138e37a | 731 | else |
ef79d9a3 | 732 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 733 | regnum, buf); |
61a0eb5b AC |
734 | } |
735 | ||
ef79d9a3 | 736 | struct value * |
849d0ba8 | 737 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
738 | { |
739 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 740 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 741 | |
d999647b | 742 | if (regnum < num_raw_registers () |
849d0ba8 | 743 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 744 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
745 | { |
746 | struct value *result; | |
747 | ||
ef79d9a3 | 748 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
749 | VALUE_LVAL (result) = lval_register; |
750 | VALUE_REGNUM (result) = regnum; | |
751 | ||
752 | /* It is more efficient in general to do this delegation in this | |
753 | direction than in the other one, even though the value-based | |
754 | API is preferred. */ | |
ef79d9a3 | 755 | if (cooked_read (regnum, |
50888e42 | 756 | value_contents_raw (result).data ()) == REG_UNAVAILABLE) |
3543a589 | 757 | mark_value_bytes_unavailable (result, 0, |
df86565b | 758 | value_type (result)->length ()); |
3543a589 TT |
759 | |
760 | return result; | |
761 | } | |
762 | else | |
ef79d9a3 YQ |
763 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
764 | this, regnum); | |
3543a589 TT |
765 | } |
766 | ||
05d1431c | 767 | enum register_status |
a378f419 AC |
768 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
769 | LONGEST *val) | |
ef79d9a3 YQ |
770 | { |
771 | gdb_assert (regcache != NULL); | |
6f98355c | 772 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
773 | } |
774 | ||
6f98355c | 775 | template<typename T, typename> |
ef79d9a3 | 776 | enum register_status |
849d0ba8 | 777 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 778 | { |
ef79d9a3 | 779 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
2a50938a SM |
780 | size_t len = m_descr->sizeof_register[regnum]; |
781 | gdb_byte *buf = (gdb_byte *) alloca (len); | |
782 | register_status status = cooked_read (regnum, buf); | |
05d1431c | 783 | if (status == REG_VALID) |
2a50938a | 784 | *val = extract_integer<T> ({buf, len}, |
6f98355c | 785 | gdbarch_byte_order (m_descr->gdbarch)); |
05d1431c PA |
786 | else |
787 | *val = 0; | |
788 | return status; | |
a378f419 AC |
789 | } |
790 | ||
05d1431c | 791 | enum register_status |
a378f419 AC |
792 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
793 | ULONGEST *val) | |
ef79d9a3 YQ |
794 | { |
795 | gdb_assert (regcache != NULL); | |
6f98355c | 796 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
797 | } |
798 | ||
a66a9c23 AC |
799 | void |
800 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
801 | LONGEST val) | |
ef79d9a3 YQ |
802 | { |
803 | gdb_assert (regcache != NULL); | |
6f98355c | 804 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
805 | } |
806 | ||
6f98355c | 807 | template<typename T, typename> |
ef79d9a3 | 808 | void |
6f98355c | 809 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 810 | { |
7c543f7b | 811 | gdb_byte *buf; |
123f5f96 | 812 | |
ef79d9a3 YQ |
813 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
814 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
815 | store_integer (buf, m_descr->sizeof_register[regnum], |
816 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 817 | cooked_write (regnum, buf); |
a66a9c23 AC |
818 | } |
819 | ||
820 | void | |
821 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
822 | ULONGEST val) | |
ef79d9a3 YQ |
823 | { |
824 | gdb_assert (regcache != NULL); | |
6f98355c | 825 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
826 | } |
827 | ||
ef79d9a3 YQ |
828 | void |
829 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 830 | { |
594f7785 | 831 | |
ef79d9a3 | 832 | gdb_assert (buf != NULL); |
4e888c28 | 833 | assert_regnum (regnum); |
3fadccb3 | 834 | |
3fadccb3 AC |
835 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
836 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 837 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
838 | return; |
839 | ||
3fadccb3 | 840 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 841 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
842 | if (get_register_status (regnum) == REG_VALID |
843 | && (memcmp (register_buffer (regnum), buf, | |
844 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
845 | return; |
846 | ||
ef79d9a3 | 847 | target_prepare_to_store (this); |
c8ec2f33 | 848 | raw_supply (regnum, buf); |
b94ade42 | 849 | |
b292235f TT |
850 | /* Invalidate the register after it is written, in case of a |
851 | failure. */ | |
311dc83a TT |
852 | auto invalidator |
853 | = make_scope_exit ([&] { this->invalidate (regnum); }); | |
b94ade42 | 854 | |
ef79d9a3 | 855 | target_store_registers (this, regnum); |
594f7785 | 856 | |
b292235f TT |
857 | /* The target did not throw an error so we can discard invalidating |
858 | the register. */ | |
859 | invalidator.release (); | |
61a0eb5b AC |
860 | } |
861 | ||
ef79d9a3 YQ |
862 | void |
863 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 864 | { |
d138e37a | 865 | gdb_assert (regnum >= 0); |
ef79d9a3 | 866 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 867 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 868 | raw_write (regnum, buf); |
d138e37a | 869 | else |
ef79d9a3 | 870 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 871 | regnum, buf); |
61a0eb5b AC |
872 | } |
873 | ||
33bab475 | 874 | /* See regcache.h. */ |
06c0b04e | 875 | |
ef79d9a3 | 876 | enum register_status |
33bab475 AH |
877 | readable_regcache::read_part (int regnum, int offset, int len, |
878 | gdb_byte *out, bool is_raw) | |
849d0ba8 | 879 | { |
33bab475 AH |
880 | int reg_size = register_size (arch (), regnum); |
881 | ||
882 | gdb_assert (out != NULL); | |
8e7767e3 AH |
883 | gdb_assert (offset >= 0 && offset <= reg_size); |
884 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
885 | |
886 | if (offset == 0 && len == 0) | |
887 | { | |
888 | /* Nothing to do. */ | |
889 | return REG_VALID; | |
890 | } | |
891 | ||
892 | if (offset == 0 && len == reg_size) | |
893 | { | |
894 | /* Read the full register. */ | |
895 | return (is_raw) ? raw_read (regnum, out) : cooked_read (regnum, out); | |
896 | } | |
849d0ba8 | 897 | |
849d0ba8 | 898 | enum register_status status; |
33bab475 | 899 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); |
849d0ba8 | 900 | |
33bab475 AH |
901 | /* Read full register to buffer. */ |
902 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
849d0ba8 YQ |
903 | if (status != REG_VALID) |
904 | return status; | |
905 | ||
33bab475 AH |
906 | /* Copy out. */ |
907 | memcpy (out, reg + offset, len); | |
849d0ba8 YQ |
908 | return REG_VALID; |
909 | } | |
910 | ||
33bab475 AH |
911 | /* See regcache.h. */ |
912 | ||
8e7767e3 AH |
913 | void |
914 | reg_buffer::raw_collect_part (int regnum, int offset, int len, | |
915 | gdb_byte *out) const | |
916 | { | |
917 | int reg_size = register_size (arch (), regnum); | |
918 | ||
919 | gdb_assert (out != nullptr); | |
920 | gdb_assert (offset >= 0 && offset <= reg_size); | |
921 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
922 | ||
923 | if (offset == 0 && len == 0) | |
924 | { | |
925 | /* Nothing to do. */ | |
926 | return; | |
927 | } | |
928 | ||
929 | if (offset == 0 && len == reg_size) | |
930 | { | |
931 | /* Collect the full register. */ | |
932 | return raw_collect (regnum, out); | |
933 | } | |
934 | ||
935 | /* Read to buffer, then write out. */ | |
936 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
937 | raw_collect (regnum, reg); | |
938 | memcpy (out, reg + offset, len); | |
939 | } | |
940 | ||
941 | /* See regcache.h. */ | |
942 | ||
849d0ba8 YQ |
943 | enum register_status |
944 | regcache::write_part (int regnum, int offset, int len, | |
33bab475 | 945 | const gdb_byte *in, bool is_raw) |
ef79d9a3 | 946 | { |
33bab475 | 947 | int reg_size = register_size (arch (), regnum); |
123f5f96 | 948 | |
33bab475 | 949 | gdb_assert (in != NULL); |
8e7767e3 AH |
950 | gdb_assert (offset >= 0 && offset <= reg_size); |
951 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
33bab475 AH |
952 | |
953 | if (offset == 0 && len == 0) | |
06c0b04e | 954 | { |
33bab475 AH |
955 | /* Nothing to do. */ |
956 | return REG_VALID; | |
957 | } | |
05d1431c | 958 | |
33bab475 AH |
959 | if (offset == 0 && len == reg_size) |
960 | { | |
961 | /* Write the full register. */ | |
962 | (is_raw) ? raw_write (regnum, in) : cooked_write (regnum, in); | |
963 | return REG_VALID; | |
06c0b04e | 964 | } |
849d0ba8 | 965 | |
33bab475 AH |
966 | enum register_status status; |
967 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
05d1431c | 968 | |
33bab475 AH |
969 | /* Read existing register to buffer. */ |
970 | status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg); | |
971 | if (status != REG_VALID) | |
972 | return status; | |
973 | ||
974 | /* Update buffer, then write back to regcache. */ | |
975 | memcpy (reg + offset, in, len); | |
976 | is_raw ? raw_write (regnum, reg) : cooked_write (regnum, reg); | |
05d1431c | 977 | return REG_VALID; |
06c0b04e AC |
978 | } |
979 | ||
33bab475 AH |
980 | /* See regcache.h. */ |
981 | ||
8e7767e3 AH |
982 | void |
983 | reg_buffer::raw_supply_part (int regnum, int offset, int len, | |
984 | const gdb_byte *in) | |
985 | { | |
986 | int reg_size = register_size (arch (), regnum); | |
987 | ||
988 | gdb_assert (in != nullptr); | |
989 | gdb_assert (offset >= 0 && offset <= reg_size); | |
990 | gdb_assert (len >= 0 && offset + len <= reg_size); | |
991 | ||
992 | if (offset == 0 && len == 0) | |
993 | { | |
994 | /* Nothing to do. */ | |
995 | return; | |
996 | } | |
997 | ||
998 | if (offset == 0 && len == reg_size) | |
999 | { | |
1000 | /* Supply the full register. */ | |
1001 | return raw_supply (regnum, in); | |
1002 | } | |
1003 | ||
1004 | gdb_byte *reg = (gdb_byte *) alloca (reg_size); | |
1005 | ||
1006 | /* Read existing value to buffer. */ | |
1007 | raw_collect (regnum, reg); | |
1008 | ||
1009 | /* Write to buffer, then write out. */ | |
1010 | memcpy (reg + offset, in, len); | |
1011 | raw_supply (regnum, reg); | |
1012 | } | |
1013 | ||
ef79d9a3 | 1014 | enum register_status |
33bab475 AH |
1015 | readable_regcache::raw_read_part (int regnum, int offset, int len, |
1016 | gdb_byte *buf) | |
ef79d9a3 | 1017 | { |
4e888c28 | 1018 | assert_regnum (regnum); |
849d0ba8 | 1019 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
1020 | } |
1021 | ||
4f0420fd | 1022 | /* See regcache.h. */ |
123f5f96 | 1023 | |
ef79d9a3 YQ |
1024 | void |
1025 | regcache::raw_write_part (int regnum, int offset, int len, | |
1026 | const gdb_byte *buf) | |
1027 | { | |
4e888c28 | 1028 | assert_regnum (regnum); |
849d0ba8 | 1029 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
1030 | } |
1031 | ||
33bab475 AH |
1032 | /* See regcache.h. */ |
1033 | ||
ef79d9a3 | 1034 | enum register_status |
849d0ba8 YQ |
1035 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
1036 | gdb_byte *buf) | |
ef79d9a3 YQ |
1037 | { |
1038 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 1039 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
1040 | } |
1041 | ||
33bab475 AH |
1042 | /* See regcache.h. */ |
1043 | ||
ef79d9a3 YQ |
1044 | void |
1045 | regcache::cooked_write_part (int regnum, int offset, int len, | |
1046 | const gdb_byte *buf) | |
1047 | { | |
1048 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 1049 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 1050 | } |
32178cab | 1051 | |
268a13a5 | 1052 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 1053 | |
ef79d9a3 | 1054 | void |
9c861883 | 1055 | reg_buffer::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
1056 | { |
1057 | void *regbuf; | |
1058 | size_t size; | |
1059 | ||
4e888c28 | 1060 | assert_regnum (regnum); |
9a661b68 | 1061 | |
ef79d9a3 YQ |
1062 | regbuf = register_buffer (regnum); |
1063 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1064 | |
1065 | if (buf) | |
ee99023e PA |
1066 | { |
1067 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 1068 | m_register_status[regnum] = REG_VALID; |
ee99023e | 1069 | } |
9a661b68 | 1070 | else |
ee99023e PA |
1071 | { |
1072 | /* This memset not strictly necessary, but better than garbage | |
1073 | in case the register value manages to escape somewhere (due | |
1074 | to a bug, no less). */ | |
1075 | memset (regbuf, 0, size); | |
ef79d9a3 | 1076 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 1077 | } |
9a661b68 MK |
1078 | } |
1079 | ||
9c861883 | 1080 | /* See regcache.h. */ |
b057297a AH |
1081 | |
1082 | void | |
9c861883 AH |
1083 | reg_buffer::raw_supply_integer (int regnum, const gdb_byte *addr, |
1084 | int addr_len, bool is_signed) | |
b057297a AH |
1085 | { |
1086 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1087 | gdb_byte *regbuf; | |
1088 | size_t regsize; | |
1089 | ||
4e888c28 | 1090 | assert_regnum (regnum); |
b057297a AH |
1091 | |
1092 | regbuf = register_buffer (regnum); | |
1093 | regsize = m_descr->sizeof_register[regnum]; | |
1094 | ||
1095 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
1096 | byte_order); | |
1097 | m_register_status[regnum] = REG_VALID; | |
1098 | } | |
1099 | ||
9c861883 | 1100 | /* See regcache.h. */ |
f81fdd35 AH |
1101 | |
1102 | void | |
9c861883 | 1103 | reg_buffer::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1104 | { |
1105 | void *regbuf; | |
1106 | size_t size; | |
1107 | ||
4e888c28 | 1108 | assert_regnum (regnum); |
f81fdd35 AH |
1109 | |
1110 | regbuf = register_buffer (regnum); | |
1111 | size = m_descr->sizeof_register[regnum]; | |
1112 | ||
1113 | memset (regbuf, 0, size); | |
1114 | m_register_status[regnum] = REG_VALID; | |
1115 | } | |
1116 | ||
268a13a5 | 1117 | /* See gdbsupport/common-regcache.h. */ |
9c861883 | 1118 | |
ef79d9a3 | 1119 | void |
9c861883 | 1120 | reg_buffer::raw_collect (int regnum, void *buf) const |
9a661b68 MK |
1121 | { |
1122 | const void *regbuf; | |
1123 | size_t size; | |
1124 | ||
ef79d9a3 | 1125 | gdb_assert (buf != NULL); |
4e888c28 | 1126 | assert_regnum (regnum); |
9a661b68 | 1127 | |
ef79d9a3 YQ |
1128 | regbuf = register_buffer (regnum); |
1129 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1130 | memcpy (buf, regbuf, size); |
1131 | } | |
1132 | ||
9c861883 | 1133 | /* See regcache.h. */ |
b057297a AH |
1134 | |
1135 | void | |
9c861883 AH |
1136 | reg_buffer::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
1137 | bool is_signed) const | |
b057297a AH |
1138 | { |
1139 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1140 | const gdb_byte *regbuf; | |
1141 | size_t regsize; | |
1142 | ||
4e888c28 | 1143 | assert_regnum (regnum); |
b057297a AH |
1144 | |
1145 | regbuf = register_buffer (regnum); | |
1146 | regsize = m_descr->sizeof_register[regnum]; | |
1147 | ||
1148 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
1149 | byte_order); | |
1150 | } | |
1151 | ||
8e7767e3 AH |
1152 | /* See regcache.h. */ |
1153 | ||
1154 | void | |
1155 | regcache::transfer_regset_register (struct regcache *out_regcache, int regnum, | |
1156 | const gdb_byte *in_buf, gdb_byte *out_buf, | |
1157 | int slot_size, int offs) const | |
1158 | { | |
1159 | struct gdbarch *gdbarch = arch (); | |
1160 | int reg_size = std::min (register_size (gdbarch, regnum), slot_size); | |
1161 | ||
1162 | /* Use part versions and reg_size to prevent possible buffer overflows when | |
1163 | accessing the regcache. */ | |
1164 | ||
1165 | if (out_buf != nullptr) | |
1166 | { | |
1167 | raw_collect_part (regnum, 0, reg_size, out_buf + offs); | |
1168 | ||
1169 | /* Ensure any additional space is cleared. */ | |
1170 | if (slot_size > reg_size) | |
1171 | memset (out_buf + offs + reg_size, 0, slot_size - reg_size); | |
1172 | } | |
1173 | else if (in_buf != nullptr) | |
b623bbc9 JB |
1174 | { |
1175 | /* Zero-extend the register value if the slot is smaller than the register. */ | |
1176 | if (slot_size < register_size (gdbarch, regnum)) | |
1177 | out_regcache->raw_supply_zeroed (regnum); | |
1178 | out_regcache->raw_supply_part (regnum, 0, reg_size, in_buf + offs); | |
1179 | } | |
8e7767e3 AH |
1180 | else |
1181 | { | |
1182 | /* Invalidate the register. */ | |
1183 | out_regcache->raw_supply (regnum, nullptr); | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | /* See regcache.h. */ | |
9c861883 | 1188 | |
ef79d9a3 YQ |
1189 | void |
1190 | regcache::transfer_regset (const struct regset *regset, | |
1191 | struct regcache *out_regcache, | |
8e7767e3 AH |
1192 | int regnum, const gdb_byte *in_buf, |
1193 | gdb_byte *out_buf, size_t size) const | |
0b309272 AA |
1194 | { |
1195 | const struct regcache_map_entry *map; | |
1196 | int offs = 0, count; | |
1197 | ||
19ba03f4 SM |
1198 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1199 | (count = map->count) != 0; | |
1200 | map++) | |
0b309272 AA |
1201 | { |
1202 | int regno = map->regno; | |
1203 | int slot_size = map->size; | |
1204 | ||
1205 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1206 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1207 | |
1208 | if (regno == REGCACHE_MAP_SKIP | |
1209 | || (regnum != -1 | |
1210 | && (regnum < regno || regnum >= regno + count))) | |
1211 | offs += count * slot_size; | |
1212 | ||
1213 | else if (regnum == -1) | |
1214 | for (; count--; regno++, offs += slot_size) | |
1215 | { | |
1216 | if (offs + slot_size > size) | |
1217 | break; | |
1218 | ||
8e7767e3 AH |
1219 | transfer_regset_register (out_regcache, regno, in_buf, out_buf, |
1220 | slot_size, offs); | |
0b309272 AA |
1221 | } |
1222 | else | |
1223 | { | |
1224 | /* Transfer a single register and return. */ | |
1225 | offs += (regnum - regno) * slot_size; | |
1226 | if (offs + slot_size > size) | |
1227 | return; | |
1228 | ||
8e7767e3 AH |
1229 | transfer_regset_register (out_regcache, regnum, in_buf, out_buf, |
1230 | slot_size, offs); | |
0b309272 AA |
1231 | return; |
1232 | } | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1237 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1238 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1239 | ||
1240 | void | |
1241 | regcache_supply_regset (const struct regset *regset, | |
1242 | struct regcache *regcache, | |
1243 | int regnum, const void *buf, size_t size) | |
1244 | { | |
8e7767e3 | 1245 | regcache->supply_regset (regset, regnum, (const gdb_byte *) buf, size); |
ef79d9a3 YQ |
1246 | } |
1247 | ||
1248 | void | |
1249 | regcache::supply_regset (const struct regset *regset, | |
1250 | int regnum, const void *buf, size_t size) | |
1251 | { | |
8e7767e3 | 1252 | transfer_regset (regset, this, regnum, (const gdb_byte *) buf, nullptr, size); |
0b309272 AA |
1253 | } |
1254 | ||
1255 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1256 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1257 | REGSET. */ | |
1258 | ||
1259 | void | |
1260 | regcache_collect_regset (const struct regset *regset, | |
1261 | const struct regcache *regcache, | |
1262 | int regnum, void *buf, size_t size) | |
1263 | { | |
8e7767e3 | 1264 | regcache->collect_regset (regset, regnum, (gdb_byte *) buf, size); |
ef79d9a3 YQ |
1265 | } |
1266 | ||
1267 | void | |
1268 | regcache::collect_regset (const struct regset *regset, | |
1269 | int regnum, void *buf, size_t size) const | |
1270 | { | |
8e7767e3 | 1271 | transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size); |
0b309272 AA |
1272 | } |
1273 | ||
30a696c5 JB |
1274 | /* See regcache.h */ |
1275 | ||
1276 | bool | |
1277 | regcache_map_supplies (const struct regcache_map_entry *map, int regnum, | |
1278 | struct gdbarch *gdbarch, size_t size) | |
1279 | { | |
1280 | int offs = 0, count; | |
1281 | ||
1282 | for (; (count = map->count) != 0; map++) | |
1283 | { | |
1284 | int regno = map->regno; | |
1285 | int slot_size = map->size; | |
1286 | ||
1287 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
1288 | slot_size = register_size (gdbarch, regno); | |
1289 | ||
1290 | if (regno != REGCACHE_MAP_SKIP && regnum >= regno | |
1291 | && regnum < regno + count) | |
1292 | return offs + (regnum - regno + 1) * slot_size <= size; | |
1293 | ||
1294 | offs += count * slot_size; | |
1295 | if (offs >= size) | |
1296 | return false; | |
1297 | } | |
1298 | return false; | |
1299 | } | |
1300 | ||
268a13a5 | 1301 | /* See gdbsupport/common-regcache.h. */ |
f868386e AH |
1302 | |
1303 | bool | |
1304 | reg_buffer::raw_compare (int regnum, const void *buf, int offset) const | |
1305 | { | |
1306 | gdb_assert (buf != NULL); | |
1307 | assert_regnum (regnum); | |
1308 | ||
1309 | const char *regbuf = (const char *) register_buffer (regnum); | |
1310 | size_t size = m_descr->sizeof_register[regnum]; | |
1311 | gdb_assert (size >= offset); | |
1312 | ||
1313 | return (memcmp (buf, regbuf + offset, size - offset) == 0); | |
1314 | } | |
193cb69f | 1315 | |
515630c5 | 1316 | /* Special handling for register PC. */ |
32178cab MS |
1317 | |
1318 | CORE_ADDR | |
515630c5 | 1319 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1320 | { |
ac7936df | 1321 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1322 | |
32178cab MS |
1323 | CORE_ADDR pc_val; |
1324 | ||
61a1198a UW |
1325 | if (gdbarch_read_pc_p (gdbarch)) |
1326 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1327 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1328 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1329 | { |
61a1198a | 1330 | ULONGEST raw_val; |
123f5f96 | 1331 | |
05d1431c PA |
1332 | if (regcache_cooked_read_unsigned (regcache, |
1333 | gdbarch_pc_regnum (gdbarch), | |
1334 | &raw_val) == REG_UNAVAILABLE) | |
1335 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1336 | ||
214e098a | 1337 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1338 | } |
1339 | else | |
515630c5 UW |
1340 | internal_error (__FILE__, __LINE__, |
1341 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1342 | return pc_val; |
1343 | } | |
1344 | ||
fc75c28b TBA |
1345 | /* See gdbsupport/common-regcache.h. */ |
1346 | ||
1347 | CORE_ADDR | |
1348 | regcache_read_pc_protected (regcache *regcache) | |
1349 | { | |
1350 | CORE_ADDR pc; | |
1351 | try | |
1352 | { | |
1353 | pc = regcache_read_pc (regcache); | |
1354 | } | |
1355 | catch (const gdb_exception_error &ex) | |
1356 | { | |
1357 | pc = 0; | |
1358 | } | |
1359 | ||
1360 | return pc; | |
1361 | } | |
1362 | ||
32178cab | 1363 | void |
515630c5 | 1364 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1365 | { |
ac7936df | 1366 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1367 | |
61a1198a UW |
1368 | if (gdbarch_write_pc_p (gdbarch)) |
1369 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1370 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1371 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1372 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1373 | else |
1374 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1375 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1376 | |
1377 | /* Writing the PC (for instance, from "load") invalidates the | |
1378 | current frame. */ | |
1379 | reinit_frame_cache (); | |
32178cab MS |
1380 | } |
1381 | ||
d999647b | 1382 | int |
31716595 | 1383 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1384 | { |
1385 | return gdbarch_num_regs (arch ()); | |
1386 | } | |
1387 | ||
ed771251 | 1388 | void |
ef79d9a3 | 1389 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1390 | { |
ef79d9a3 | 1391 | struct gdbarch *gdbarch = arch (); |
ed771251 | 1392 | |
6cb06a8c | 1393 | gdb_printf (gdb_stdlog, "%s ", func); |
ed771251 AH |
1394 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
1395 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1396 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
6cb06a8c TT |
1397 | gdb_printf (gdb_stdlog, "(%s)", |
1398 | gdbarch_register_name (gdbarch, regno)); | |
ed771251 | 1399 | else |
6cb06a8c | 1400 | gdb_printf (gdb_stdlog, "(%d)", regno); |
ed771251 AH |
1401 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
1402 | { | |
1403 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1404 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1405 | gdb_byte *buf = register_buffer (regno); |
ed771251 | 1406 | |
6cb06a8c | 1407 | gdb_printf (gdb_stdlog, " = "); |
ed771251 AH |
1408 | for (int i = 0; i < size; i++) |
1409 | { | |
6cb06a8c | 1410 | gdb_printf (gdb_stdlog, "%02x", buf[i]); |
ed771251 AH |
1411 | } |
1412 | if (size <= sizeof (LONGEST)) | |
1413 | { | |
1414 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1415 | ||
6cb06a8c TT |
1416 | gdb_printf (gdb_stdlog, " %s %s", |
1417 | core_addr_to_string_nz (val), plongest (val)); | |
ed771251 AH |
1418 | } |
1419 | } | |
6cb06a8c | 1420 | gdb_printf (gdb_stdlog, "\n"); |
ed771251 | 1421 | } |
32178cab | 1422 | |
50a5f187 AB |
1423 | /* Implement 'maint flush register-cache' command. */ |
1424 | ||
705152c5 | 1425 | static void |
0b39b52e | 1426 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1427 | { |
1428 | /* Force-flush the register cache. */ | |
1429 | registers_changed (); | |
1430 | if (from_tty) | |
6cb06a8c | 1431 | gdb_printf (_("Register cache flushed.\n")); |
705152c5 MS |
1432 | } |
1433 | ||
4c74fe6b YQ |
1434 | void |
1435 | register_dump::dump (ui_file *file) | |
af030b9a | 1436 | { |
4c74fe6b YQ |
1437 | auto descr = regcache_descr (m_gdbarch); |
1438 | int regnum; | |
1439 | int footnote_nr = 0; | |
1440 | int footnote_register_offset = 0; | |
1441 | int footnote_register_type_name_null = 0; | |
1442 | long register_offset = 0; | |
af030b9a | 1443 | |
4c74fe6b | 1444 | gdb_assert (descr->nr_cooked_registers |
f6efe3f8 | 1445 | == gdbarch_num_cooked_regs (m_gdbarch)); |
af030b9a | 1446 | |
4c74fe6b YQ |
1447 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1448 | { | |
1449 | /* Name. */ | |
1450 | if (regnum < 0) | |
6cb06a8c | 1451 | gdb_printf (file, " %-10s", "Name"); |
4c74fe6b YQ |
1452 | else |
1453 | { | |
1454 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1455 | |
4c74fe6b YQ |
1456 | if (p == NULL) |
1457 | p = ""; | |
1458 | else if (p[0] == '\0') | |
1459 | p = "''"; | |
6cb06a8c | 1460 | gdb_printf (file, " %-10s", p); |
4c74fe6b | 1461 | } |
af030b9a | 1462 | |
4c74fe6b YQ |
1463 | /* Number. */ |
1464 | if (regnum < 0) | |
6cb06a8c | 1465 | gdb_printf (file, " %4s", "Nr"); |
4c74fe6b | 1466 | else |
6cb06a8c | 1467 | gdb_printf (file, " %4d", regnum); |
af030b9a | 1468 | |
4c74fe6b YQ |
1469 | /* Relative number. */ |
1470 | if (regnum < 0) | |
6cb06a8c | 1471 | gdb_printf (file, " %4s", "Rel"); |
4c74fe6b | 1472 | else if (regnum < gdbarch_num_regs (m_gdbarch)) |
6cb06a8c | 1473 | gdb_printf (file, " %4d", regnum); |
4c74fe6b | 1474 | else |
6cb06a8c TT |
1475 | gdb_printf (file, " %4d", |
1476 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1477 | |
4c74fe6b YQ |
1478 | /* Offset. */ |
1479 | if (regnum < 0) | |
6cb06a8c | 1480 | gdb_printf (file, " %6s ", "Offset"); |
4c74fe6b | 1481 | else |
af030b9a | 1482 | { |
6cb06a8c TT |
1483 | gdb_printf (file, " %6ld", |
1484 | descr->register_offset[regnum]); | |
4c74fe6b YQ |
1485 | if (register_offset != descr->register_offset[regnum] |
1486 | || (regnum > 0 | |
1487 | && (descr->register_offset[regnum] | |
1488 | != (descr->register_offset[regnum - 1] | |
1489 | + descr->sizeof_register[regnum - 1]))) | |
1490 | ) | |
af030b9a | 1491 | { |
4c74fe6b YQ |
1492 | if (!footnote_register_offset) |
1493 | footnote_register_offset = ++footnote_nr; | |
6cb06a8c | 1494 | gdb_printf (file, "*%d", footnote_register_offset); |
af030b9a | 1495 | } |
4c74fe6b | 1496 | else |
6cb06a8c | 1497 | gdb_printf (file, " "); |
4c74fe6b YQ |
1498 | register_offset = (descr->register_offset[regnum] |
1499 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1500 | } |
1501 | ||
4c74fe6b YQ |
1502 | /* Size. */ |
1503 | if (regnum < 0) | |
6cb06a8c | 1504 | gdb_printf (file, " %5s ", "Size"); |
4c74fe6b | 1505 | else |
6cb06a8c | 1506 | gdb_printf (file, " %5ld", descr->sizeof_register[regnum]); |
f3384e66 | 1507 | |
4c74fe6b | 1508 | /* Type. */ |
f3384e66 | 1509 | { |
4c74fe6b YQ |
1510 | const char *t; |
1511 | std::string name_holder; | |
b59ff9d5 | 1512 | |
4c74fe6b YQ |
1513 | if (regnum < 0) |
1514 | t = "Type"; | |
215c69dc YQ |
1515 | else |
1516 | { | |
4c74fe6b | 1517 | static const char blt[] = "builtin_type"; |
123f5f96 | 1518 | |
7d93a1e0 | 1519 | t = register_type (m_gdbarch, regnum)->name (); |
4c74fe6b | 1520 | if (t == NULL) |
f3384e66 | 1521 | { |
4c74fe6b YQ |
1522 | if (!footnote_register_type_name_null) |
1523 | footnote_register_type_name_null = ++footnote_nr; | |
1524 | name_holder = string_printf ("*%d", | |
1525 | footnote_register_type_name_null); | |
1526 | t = name_holder.c_str (); | |
f3384e66 | 1527 | } |
4c74fe6b YQ |
1528 | /* Chop a leading builtin_type. */ |
1529 | if (startswith (t, blt)) | |
1530 | t += strlen (blt); | |
f3384e66 | 1531 | } |
6cb06a8c | 1532 | gdb_printf (file, " %-15s", t); |
f3384e66 | 1533 | } |
f3384e66 | 1534 | |
4c74fe6b | 1535 | /* Leading space always present. */ |
6cb06a8c | 1536 | gdb_printf (file, " "); |
af030b9a | 1537 | |
4c74fe6b | 1538 | dump_reg (file, regnum); |
ed4227b7 | 1539 | |
6cb06a8c | 1540 | gdb_printf (file, "\n"); |
ed4227b7 PA |
1541 | } |
1542 | ||
4c74fe6b | 1543 | if (footnote_register_offset) |
6cb06a8c TT |
1544 | gdb_printf (file, "*%d: Inconsistent register offsets.\n", |
1545 | footnote_register_offset); | |
4c74fe6b | 1546 | if (footnote_register_type_name_null) |
6cb06a8c TT |
1547 | gdb_printf (file, |
1548 | "*%d: Register type's name NULL.\n", | |
1549 | footnote_register_type_name_null); | |
c21236dc PA |
1550 | } |
1551 | ||
8248946c | 1552 | #if GDB_SELF_TEST |
268a13a5 | 1553 | #include "gdbsupport/selftest.h" |
1b30aaa5 | 1554 | #include "selftest-arch.h" |
ec7a5fcb | 1555 | #include "target-float.h" |
8248946c YQ |
1556 | |
1557 | namespace selftests { | |
1558 | ||
159ed7d9 SM |
1559 | static size_t |
1560 | regcaches_size () | |
8248946c | 1561 | { |
888bdb2b | 1562 | size_t size = 0; |
b70e516e SM |
1563 | |
1564 | for (auto pid_ptid_regc_map_it = regcaches.cbegin (); | |
1565 | pid_ptid_regc_map_it != regcaches.cend (); | |
1566 | ++pid_ptid_regc_map_it) | |
888bdb2b | 1567 | { |
b70e516e SM |
1568 | const pid_ptid_regcache_map &pid_ptid_regc_map |
1569 | = pid_ptid_regc_map_it->second; | |
1570 | ||
1571 | for (auto ptid_regc_map_it = pid_ptid_regc_map.cbegin (); | |
1572 | ptid_regc_map_it != pid_ptid_regc_map.cend (); | |
1573 | ++ptid_regc_map_it) | |
1574 | { | |
1575 | const ptid_regcache_map &ptid_regc_map | |
1576 | = ptid_regc_map_it->second; | |
1577 | ||
1578 | size += ptid_regc_map.size (); | |
1579 | } | |
888bdb2b SM |
1580 | } |
1581 | ||
1582 | return size; | |
159ed7d9 | 1583 | } |
8248946c | 1584 | |
cdd9148a SM |
1585 | /* Return the count of regcaches for (TARGET, PTID) in REGCACHES. */ |
1586 | ||
1587 | static int | |
1588 | regcache_count (process_stratum_target *target, ptid_t ptid) | |
1589 | { | |
b70e516e SM |
1590 | /* Look up map for target. */ |
1591 | auto pid_ptid_regc_map_it = regcaches.find (target); | |
1592 | if (pid_ptid_regc_map_it != regcaches.end ()) | |
cdd9148a | 1593 | { |
b70e516e | 1594 | pid_ptid_regcache_map &pid_ptid_regc_map = pid_ptid_regc_map_it->second; |
cdd9148a | 1595 | |
b70e516e SM |
1596 | /* Look map for pid. */ |
1597 | auto ptid_regc_map_it = pid_ptid_regc_map.find (ptid.pid ()); | |
1598 | if (ptid_regc_map_it != pid_ptid_regc_map.end ()) | |
1599 | { | |
1600 | ptid_regcache_map &ptid_regc_map = ptid_regc_map_it->second; | |
1601 | auto range = ptid_regc_map.equal_range (ptid); | |
1602 | ||
1603 | return std::distance (range.first, range.second); | |
1604 | } | |
cdd9148a SM |
1605 | } |
1606 | ||
1607 | return 0; | |
1608 | }; | |
1609 | ||
5b6d1e4f PA |
1610 | /* Wrapper around get_thread_arch_aspace_regcache that does some self checks. */ |
1611 | ||
1612 | static void | |
dd125343 SM |
1613 | get_thread_arch_aspace_regcache_and_check (process_stratum_target *target, |
1614 | ptid_t ptid) | |
5b6d1e4f | 1615 | { |
dd125343 SM |
1616 | /* We currently only test with a single gdbarch. Any gdbarch will do, so use |
1617 | the current inferior's gdbarch. Also use the current inferior's address | |
1618 | space. */ | |
1619 | gdbarch *arch = current_inferior ()->gdbarch; | |
1620 | address_space *aspace = current_inferior ()->aspace; | |
1621 | regcache *regcache | |
1622 | = get_thread_arch_aspace_regcache (target, ptid, arch, aspace); | |
1623 | ||
5b6d1e4f PA |
1624 | SELF_CHECK (regcache != NULL); |
1625 | SELF_CHECK (regcache->target () == target); | |
1626 | SELF_CHECK (regcache->ptid () == ptid); | |
dd125343 | 1627 | SELF_CHECK (regcache->arch () == arch); |
5b6d1e4f PA |
1628 | SELF_CHECK (regcache->aspace () == aspace); |
1629 | } | |
1630 | ||
cdd9148a SM |
1631 | /* The data that the regcaches selftests must hold onto for the duration of the |
1632 | test. */ | |
1633 | ||
1634 | struct regcache_test_data | |
8248946c | 1635 | { |
cdd9148a SM |
1636 | regcache_test_data () |
1637 | { | |
1638 | /* Ensure the regcaches container is empty at the start. */ | |
1639 | registers_changed (); | |
1640 | } | |
8248946c | 1641 | |
cdd9148a SM |
1642 | ~regcache_test_data () |
1643 | { | |
1644 | /* Make sure to leave the global regcaches container empty. */ | |
1645 | registers_changed (); | |
1646 | } | |
8248946c | 1647 | |
5b6d1e4f PA |
1648 | test_target_ops test_target1; |
1649 | test_target_ops test_target2; | |
cdd9148a SM |
1650 | }; |
1651 | ||
1652 | using regcache_test_data_up = std::unique_ptr<regcache_test_data>; | |
1653 | ||
1654 | /* Set up a few regcaches from two different targets, for use in | |
1655 | regcache-management tests. | |
1656 | ||
1657 | Return a pointer, because the `regcache_test_data` type is not moveable. */ | |
1658 | ||
1659 | static regcache_test_data_up | |
1660 | populate_regcaches_for_test () | |
1661 | { | |
1662 | regcache_test_data_up data (new regcache_test_data); | |
1663 | size_t expected_regcache_size = 0; | |
1664 | ||
1665 | SELF_CHECK (regcaches_size () == 0); | |
1666 | ||
1667 | /* Populate the regcache container with a few regcaches for the two test | |
1668 | targets. */ | |
1669 | for (int pid : { 1, 2 }) | |
1670 | { | |
1671 | for (long lwp : { 1, 2, 3 }) | |
1672 | { | |
1673 | get_thread_arch_aspace_regcache_and_check | |
1674 | (&data->test_target1, ptid_t (pid, lwp)); | |
1675 | expected_regcache_size++; | |
1676 | SELF_CHECK (regcaches_size () == expected_regcache_size); | |
1677 | ||
1678 | get_thread_arch_aspace_regcache_and_check | |
1679 | (&data->test_target2, ptid_t (pid, lwp)); | |
1680 | expected_regcache_size++; | |
1681 | SELF_CHECK (regcaches_size () == expected_regcache_size); | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | return data; | |
1686 | } | |
1687 | ||
1688 | static void | |
1689 | get_thread_arch_aspace_regcache_test () | |
1690 | { | |
1691 | /* populate_regcaches_for_test already tests most of the | |
1692 | get_thread_arch_aspace_regcache functionality. */ | |
1693 | regcache_test_data_up data = populate_regcaches_for_test (); | |
1694 | size_t regcaches_size_before = regcaches_size (); | |
1695 | ||
1696 | /* Test that getting an existing regcache doesn't create a new one. */ | |
1697 | get_thread_arch_aspace_regcache_and_check (&data->test_target1, ptid_t (2, 2)); | |
1698 | SELF_CHECK (regcaches_size () == regcaches_size_before); | |
1699 | } | |
1700 | ||
1701 | /* Test marking all regcaches of all targets as changed. */ | |
1702 | ||
1703 | static void | |
1704 | registers_changed_ptid_all_test () | |
1705 | { | |
1706 | regcache_test_data_up data = populate_regcaches_for_test (); | |
8248946c | 1707 | |
5b6d1e4f | 1708 | registers_changed_ptid (nullptr, minus_one_ptid); |
159ed7d9 | 1709 | SELF_CHECK (regcaches_size () == 0); |
cdd9148a | 1710 | } |
3ee93972 | 1711 | |
cdd9148a SM |
1712 | /* Test marking regcaches of a specific target as changed. */ |
1713 | ||
1714 | static void | |
1715 | registers_changed_ptid_target_test () | |
1716 | { | |
1717 | regcache_test_data_up data = populate_regcaches_for_test (); | |
1718 | ||
1719 | registers_changed_ptid (&data->test_target1, minus_one_ptid); | |
1720 | SELF_CHECK (regcaches_size () == 6); | |
1721 | ||
1722 | /* Check that we deleted the regcache for the right target. */ | |
1723 | SELF_CHECK (regcache_count (&data->test_target1, ptid_t (2, 2)) == 0); | |
1724 | SELF_CHECK (regcache_count (&data->test_target2, ptid_t (2, 2)) == 1); | |
1725 | } | |
1726 | ||
b70e516e SM |
1727 | /* Test marking regcaches of a specific (target, pid) as changed. */ |
1728 | ||
1729 | static void | |
1730 | registers_changed_ptid_target_pid_test () | |
1731 | { | |
1732 | regcache_test_data_up data = populate_regcaches_for_test (); | |
1733 | ||
1734 | registers_changed_ptid (&data->test_target1, ptid_t (2)); | |
1735 | SELF_CHECK (regcaches_size () == 9); | |
1736 | ||
1737 | /* Regcaches from target1 should not exist, while regcaches from target2 | |
1738 | should exist. */ | |
1739 | SELF_CHECK (regcache_count (&data->test_target1, ptid_t (2, 2)) == 0); | |
1740 | SELF_CHECK (regcache_count (&data->test_target2, ptid_t (2, 2)) == 1); | |
1741 | } | |
1742 | ||
cdd9148a SM |
1743 | /* Test marking regcaches of a specific (target, ptid) as changed. */ |
1744 | ||
1745 | static void | |
1746 | registers_changed_ptid_target_ptid_test () | |
1747 | { | |
1748 | regcache_test_data_up data = populate_regcaches_for_test (); | |
1749 | ||
1750 | registers_changed_ptid (&data->test_target1, ptid_t (2, 2)); | |
1751 | SELF_CHECK (regcaches_size () == 11); | |
1752 | ||
1753 | /* Check that we deleted the regcache for the right target. */ | |
1754 | SELF_CHECK (regcache_count (&data->test_target1, ptid_t (2, 2)) == 0); | |
1755 | SELF_CHECK (regcache_count (&data->test_target2, ptid_t (2, 2)) == 1); | |
8248946c YQ |
1756 | } |
1757 | ||
1b30aaa5 YQ |
1758 | class target_ops_no_register : public test_target_ops |
1759 | { | |
1760 | public: | |
1761 | target_ops_no_register () | |
1762 | : test_target_ops {} | |
f6ac5f3d | 1763 | {} |
1b30aaa5 YQ |
1764 | |
1765 | void reset () | |
1766 | { | |
1767 | fetch_registers_called = 0; | |
1768 | store_registers_called = 0; | |
1769 | xfer_partial_called = 0; | |
1770 | } | |
1771 | ||
f6ac5f3d PA |
1772 | void fetch_registers (regcache *regs, int regno) override; |
1773 | void store_registers (regcache *regs, int regno) override; | |
1774 | ||
1775 | enum target_xfer_status xfer_partial (enum target_object object, | |
1776 | const char *annex, gdb_byte *readbuf, | |
1777 | const gdb_byte *writebuf, | |
1778 | ULONGEST offset, ULONGEST len, | |
1779 | ULONGEST *xfered_len) override; | |
1780 | ||
1b30aaa5 YQ |
1781 | unsigned int fetch_registers_called = 0; |
1782 | unsigned int store_registers_called = 0; | |
1783 | unsigned int xfer_partial_called = 0; | |
1784 | }; | |
1785 | ||
f6ac5f3d PA |
1786 | void |
1787 | target_ops_no_register::fetch_registers (regcache *regs, int regno) | |
1b30aaa5 | 1788 | { |
1b30aaa5 YQ |
1789 | /* Mark register available. */ |
1790 | regs->raw_supply_zeroed (regno); | |
f6ac5f3d | 1791 | this->fetch_registers_called++; |
1b30aaa5 YQ |
1792 | } |
1793 | ||
f6ac5f3d PA |
1794 | void |
1795 | target_ops_no_register::store_registers (regcache *regs, int regno) | |
1b30aaa5 | 1796 | { |
f6ac5f3d | 1797 | this->store_registers_called++; |
1b30aaa5 YQ |
1798 | } |
1799 | ||
f6ac5f3d PA |
1800 | enum target_xfer_status |
1801 | target_ops_no_register::xfer_partial (enum target_object object, | |
1802 | const char *annex, gdb_byte *readbuf, | |
1803 | const gdb_byte *writebuf, | |
1804 | ULONGEST offset, ULONGEST len, | |
1805 | ULONGEST *xfered_len) | |
1b30aaa5 | 1806 | { |
f6ac5f3d | 1807 | this->xfer_partial_called++; |
1b30aaa5 YQ |
1808 | |
1809 | *xfered_len = len; | |
1810 | return TARGET_XFER_OK; | |
1811 | } | |
1812 | ||
1813 | class readwrite_regcache : public regcache | |
1814 | { | |
1815 | public: | |
5b6d1e4f PA |
1816 | readwrite_regcache (process_stratum_target *target, |
1817 | struct gdbarch *gdbarch) | |
1818 | : regcache (target, gdbarch, nullptr) | |
1b30aaa5 YQ |
1819 | {} |
1820 | }; | |
1821 | ||
c7220939 TV |
1822 | /* Return true if regcache::cooked_{read,write}_test should be skipped for |
1823 | GDBARCH. */ | |
1824 | ||
1825 | static bool | |
1826 | selftest_skiparch (struct gdbarch *gdbarch) | |
1827 | { | |
1828 | const char *name = gdbarch_bfd_arch_info (gdbarch)->printable_name; | |
1829 | ||
1830 | /* Avoid warning: | |
1831 | Running selftest regcache::cooked_{read,write}_test::m68hc11. | |
1832 | warning: No frame soft register found in the symbol table. | |
1833 | Stack backtrace will not work. | |
1834 | We could instead capture the output and then filter out the warning, but | |
1835 | that seems more trouble than it's worth. */ | |
1836 | return (strcmp (name, "m68hc11") == 0 | |
1837 | || strcmp (name, "m68hc12") == 0 | |
1838 | || strcmp (name, "m68hc12:HCS12") == 0); | |
1839 | } | |
1840 | ||
1b30aaa5 YQ |
1841 | /* Test regcache::cooked_read gets registers from raw registers and |
1842 | memory instead of target to_{fetch,store}_registers. */ | |
1843 | ||
1844 | static void | |
1845 | cooked_read_test (struct gdbarch *gdbarch) | |
1846 | { | |
c7220939 TV |
1847 | if (selftest_skiparch (gdbarch)) |
1848 | return; | |
1849 | ||
236ef034 | 1850 | scoped_mock_context<target_ops_no_register> mockctx (gdbarch); |
1b30aaa5 YQ |
1851 | |
1852 | /* Test that read one raw register from regcache_no_target will go | |
1853 | to the target layer. */ | |
1b30aaa5 YQ |
1854 | |
1855 | /* Find a raw register which size isn't zero. */ | |
b926417a TT |
1856 | int nonzero_regnum; |
1857 | for (nonzero_regnum = 0; | |
1858 | nonzero_regnum < gdbarch_num_regs (gdbarch); | |
1859 | nonzero_regnum++) | |
1b30aaa5 | 1860 | { |
b926417a | 1861 | if (register_size (gdbarch, nonzero_regnum) != 0) |
1b30aaa5 YQ |
1862 | break; |
1863 | } | |
1864 | ||
236ef034 | 1865 | readwrite_regcache readwrite (&mockctx.mock_target, gdbarch); |
b926417a | 1866 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, nonzero_regnum)); |
1b30aaa5 | 1867 | |
b926417a | 1868 | readwrite.raw_read (nonzero_regnum, buf.data ()); |
1b30aaa5 YQ |
1869 | |
1870 | /* raw_read calls target_fetch_registers. */ | |
236ef034 PA |
1871 | SELF_CHECK (mockctx.mock_target.fetch_registers_called > 0); |
1872 | mockctx.mock_target.reset (); | |
1b30aaa5 YQ |
1873 | |
1874 | /* Mark all raw registers valid, so the following raw registers | |
1875 | accesses won't go to target. */ | |
1876 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1877 | readwrite.raw_update (i); | |
1878 | ||
236ef034 | 1879 | mockctx.mock_target.reset (); |
1b30aaa5 YQ |
1880 | /* Then, read all raw and pseudo registers, and don't expect calling |
1881 | to_{fetch,store}_registers. */ | |
f6efe3f8 | 1882 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
1b30aaa5 YQ |
1883 | { |
1884 | if (register_size (gdbarch, regnum) == 0) | |
1885 | continue; | |
1886 | ||
b926417a | 1887 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
1b30aaa5 | 1888 | |
b926417a TT |
1889 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, |
1890 | inner_buf.data ())); | |
1b30aaa5 | 1891 | |
236ef034 PA |
1892 | SELF_CHECK (mockctx.mock_target.fetch_registers_called == 0); |
1893 | SELF_CHECK (mockctx.mock_target.store_registers_called == 0); | |
1894 | SELF_CHECK (mockctx.mock_target.xfer_partial_called == 0); | |
1b30aaa5 | 1895 | |
236ef034 | 1896 | mockctx.mock_target.reset (); |
1b30aaa5 | 1897 | } |
a63f2d2f | 1898 | |
215c69dc | 1899 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1900 | |
1901 | /* GDB may go to target layer to fetch all registers and memory for | |
1902 | readonly regcache. */ | |
236ef034 | 1903 | mockctx.mock_target.reset (); |
a63f2d2f | 1904 | |
f6efe3f8 | 1905 | for (int regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
a63f2d2f | 1906 | { |
a63f2d2f YQ |
1907 | if (register_size (gdbarch, regnum) == 0) |
1908 | continue; | |
1909 | ||
b926417a | 1910 | gdb::def_vector<gdb_byte> inner_buf (register_size (gdbarch, regnum)); |
a63f2d2f | 1911 | enum register_status status = readonly.cooked_read (regnum, |
b926417a | 1912 | inner_buf.data ()); |
a63f2d2f YQ |
1913 | |
1914 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1915 | { | |
1916 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1917 | ||
1918 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1919 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1920 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1921 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1922 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1923 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
ea005f31 | 1924 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score |
bea556ab | 1925 | || bfd_arch == bfd_arch_riscv || bfd_arch == bfd_arch_csky) |
a63f2d2f YQ |
1926 | { |
1927 | /* Raw registers. If raw registers are not in save_reggroup, | |
1928 | their status are unknown. */ | |
1929 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1930 | SELF_CHECK (status == REG_VALID); | |
1931 | else | |
1932 | SELF_CHECK (status == REG_UNKNOWN); | |
1933 | } | |
1934 | else | |
1935 | SELF_CHECK (status == REG_VALID); | |
1936 | } | |
1937 | else | |
1938 | { | |
1939 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
1940 | SELF_CHECK (status == REG_VALID); | |
1941 | else | |
1942 | { | |
1943 | /* If pseudo registers are not in save_reggroup, some of | |
1944 | them can be computed from saved raw registers, but some | |
1945 | of them are unknown. */ | |
1946 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1947 | ||
1948 | if (bfd_arch == bfd_arch_frv | |
1949 | || bfd_arch == bfd_arch_m32c | |
1950 | || bfd_arch == bfd_arch_mep | |
1951 | || bfd_arch == bfd_arch_sh) | |
1952 | SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN); | |
1953 | else if (bfd_arch == bfd_arch_mips | |
1954 | || bfd_arch == bfd_arch_h8300) | |
1955 | SELF_CHECK (status == REG_UNKNOWN); | |
1956 | else | |
1957 | SELF_CHECK (status == REG_VALID); | |
1958 | } | |
1959 | } | |
1960 | ||
236ef034 PA |
1961 | SELF_CHECK (mockctx.mock_target.fetch_registers_called == 0); |
1962 | SELF_CHECK (mockctx.mock_target.store_registers_called == 0); | |
1963 | SELF_CHECK (mockctx.mock_target.xfer_partial_called == 0); | |
a63f2d2f | 1964 | |
236ef034 | 1965 | mockctx.mock_target.reset (); |
a63f2d2f | 1966 | } |
1b30aaa5 YQ |
1967 | } |
1968 | ||
ec7a5fcb YQ |
1969 | /* Test regcache::cooked_write by writing some expected contents to |
1970 | registers, and checking that contents read from registers and the | |
1971 | expected contents are the same. */ | |
1972 | ||
1973 | static void | |
1974 | cooked_write_test (struct gdbarch *gdbarch) | |
1975 | { | |
c7220939 TV |
1976 | if (selftest_skiparch (gdbarch)) |
1977 | return; | |
1978 | ||
ec7a5fcb | 1979 | /* Create a mock environment. A process_stratum target pushed. */ |
d890c720 SM |
1980 | scoped_mock_context<target_ops_no_register> ctx (gdbarch); |
1981 | readwrite_regcache readwrite (&ctx.mock_target, gdbarch); | |
f6efe3f8 | 1982 | const int num_regs = gdbarch_num_cooked_regs (gdbarch); |
ec7a5fcb YQ |
1983 | |
1984 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1985 | { | |
1986 | if (register_size (gdbarch, regnum) == 0 | |
1987 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1988 | continue; | |
1989 | ||
1990 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1991 | ||
abf516c6 UW |
1992 | if (bfd_arch == bfd_arch_sparc |
1993 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1994 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1995 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1996 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1997 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
ec7a5fcb YQ |
1998 | continue; |
1999 | ||
2000 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
2001 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
2002 | const auto type = register_type (gdbarch, regnum); | |
2003 | ||
78134374 SM |
2004 | if (type->code () == TYPE_CODE_FLT |
2005 | || type->code () == TYPE_CODE_DECFLOAT) | |
ec7a5fcb YQ |
2006 | { |
2007 | /* Generate valid float format. */ | |
2008 | target_float_from_string (expected.data (), type, "1.25"); | |
2009 | } | |
78134374 SM |
2010 | else if (type->code () == TYPE_CODE_INT |
2011 | || type->code () == TYPE_CODE_ARRAY | |
2012 | || type->code () == TYPE_CODE_PTR | |
2013 | || type->code () == TYPE_CODE_UNION | |
2014 | || type->code () == TYPE_CODE_STRUCT) | |
ec7a5fcb YQ |
2015 | { |
2016 | if (bfd_arch == bfd_arch_ia64 | |
2017 | || (regnum >= gdbarch_num_regs (gdbarch) | |
2018 | && (bfd_arch == bfd_arch_xtensa | |
2019 | || bfd_arch == bfd_arch_bfin | |
2020 | || bfd_arch == bfd_arch_m32c | |
2021 | /* m68hc11 pseudo registers are in memory. */ | |
2022 | || bfd_arch == bfd_arch_m68hc11 | |
2023 | || bfd_arch == bfd_arch_m68hc12 | |
2024 | || bfd_arch == bfd_arch_s390)) | |
2025 | || (bfd_arch == bfd_arch_frv | |
2026 | /* FRV pseudo registers except iacc0. */ | |
2027 | && regnum > gdbarch_num_regs (gdbarch))) | |
2028 | { | |
2029 | /* Skip setting the expected values for some architecture | |
2030 | registers. */ | |
2031 | } | |
2032 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
2033 | { | |
2034 | /* RL78_PC_REGNUM */ | |
2035 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
2036 | expected[j] = j; | |
2037 | } | |
2038 | else | |
2039 | { | |
2040 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
2041 | expected[j] = j; | |
2042 | } | |
2043 | } | |
78134374 | 2044 | else if (type->code () == TYPE_CODE_FLAGS) |
ec7a5fcb YQ |
2045 | { |
2046 | /* No idea how to test flags. */ | |
2047 | continue; | |
2048 | } | |
2049 | else | |
2050 | { | |
2051 | /* If we don't know how to create the expected value for the | |
2052 | this type, make it fail. */ | |
2053 | SELF_CHECK (0); | |
2054 | } | |
2055 | ||
2056 | readwrite.cooked_write (regnum, expected.data ()); | |
2057 | ||
2058 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
2059 | SELF_CHECK (expected == buf); | |
2060 | } | |
2061 | } | |
2062 | ||
b161a60d SM |
2063 | /* Verify that when two threads with the same ptid exist (from two different |
2064 | targets) and one of them changes ptid, we only update the appropriate | |
2065 | regcaches. */ | |
2066 | ||
2067 | static void | |
2068 | regcache_thread_ptid_changed () | |
2069 | { | |
2070 | /* This test relies on the global regcache list to initially be empty. */ | |
2071 | registers_changed (); | |
2072 | ||
2073 | /* Any arch will do. */ | |
2074 | gdbarch *arch = current_inferior ()->gdbarch; | |
2075 | ||
2076 | /* Prepare two targets with one thread each, with the same ptid. */ | |
2077 | scoped_mock_context<test_target_ops> target1 (arch); | |
2078 | scoped_mock_context<test_target_ops> target2 (arch); | |
b161a60d SM |
2079 | |
2080 | ptid_t old_ptid (111, 222); | |
2081 | ptid_t new_ptid (111, 333); | |
2082 | ||
2083 | target1.mock_inferior.pid = old_ptid.pid (); | |
2084 | target1.mock_thread.ptid = old_ptid; | |
922cc93d SM |
2085 | target1.mock_inferior.ptid_thread_map.clear (); |
2086 | target1.mock_inferior.ptid_thread_map[old_ptid] = &target1.mock_thread; | |
2087 | ||
b161a60d SM |
2088 | target2.mock_inferior.pid = old_ptid.pid (); |
2089 | target2.mock_thread.ptid = old_ptid; | |
922cc93d SM |
2090 | target2.mock_inferior.ptid_thread_map.clear (); |
2091 | target2.mock_inferior.ptid_thread_map[old_ptid] = &target2.mock_thread; | |
b161a60d SM |
2092 | |
2093 | gdb_assert (regcaches.empty ()); | |
2094 | ||
2095 | /* Populate the regcaches container. */ | |
2096 | get_thread_arch_aspace_regcache (&target1.mock_target, old_ptid, arch, | |
2097 | nullptr); | |
2098 | get_thread_arch_aspace_regcache (&target2.mock_target, old_ptid, arch, | |
2099 | nullptr); | |
2100 | ||
888bdb2b SM |
2101 | gdb_assert (regcaches.size () == 2); |
2102 | gdb_assert (regcache_count (&target1.mock_target, old_ptid) == 1); | |
2103 | gdb_assert (regcache_count (&target1.mock_target, new_ptid) == 0); | |
2104 | gdb_assert (regcache_count (&target2.mock_target, old_ptid) == 1); | |
2105 | gdb_assert (regcache_count (&target2.mock_target, new_ptid) == 0); | |
b161a60d SM |
2106 | |
2107 | thread_change_ptid (&target1.mock_target, old_ptid, new_ptid); | |
2108 | ||
888bdb2b SM |
2109 | gdb_assert (regcaches.size () == 2); |
2110 | gdb_assert (regcache_count (&target1.mock_target, old_ptid) == 0); | |
2111 | gdb_assert (regcache_count (&target1.mock_target, new_ptid) == 1); | |
2112 | gdb_assert (regcache_count (&target2.mock_target, old_ptid) == 1); | |
2113 | gdb_assert (regcache_count (&target2.mock_target, new_ptid) == 0); | |
b161a60d SM |
2114 | |
2115 | /* Leave the regcache list empty. */ | |
2116 | registers_changed (); | |
2117 | gdb_assert (regcaches.empty ()); | |
2118 | } | |
2119 | ||
8248946c YQ |
2120 | } // namespace selftests |
2121 | #endif /* GDB_SELF_TEST */ | |
2122 | ||
6c265988 | 2123 | void _initialize_regcache (); |
32178cab | 2124 | void |
6c265988 | 2125 | _initialize_regcache () |
32178cab | 2126 | { |
50a5f187 AB |
2127 | struct cmd_list_element *c; |
2128 | ||
c90e7d63 SM |
2129 | gdb::observers::target_changed.attach (regcache_observer_target_changed, |
2130 | "regcache"); | |
2131 | gdb::observers::thread_ptid_changed.attach (regcache_thread_ptid_changed, | |
2132 | "regcache"); | |
f4c5303c | 2133 | |
3947f654 SM |
2134 | cmd_list_element *maintenance_flush_register_cache_cmd |
2135 | = add_cmd ("register-cache", class_maintenance, reg_flush_command, | |
2136 | _("Force gdb to flush its register and frame cache."), | |
2137 | &maintenanceflushlist); | |
2138 | c = add_com_alias ("flushregs", maintenance_flush_register_cache_cmd, | |
50a5f187 AB |
2139 | class_maintenance, 0); |
2140 | deprecate_cmd (c, "maintenance flush register-cache"); | |
39f77062 | 2141 | |
8248946c | 2142 | #if GDB_SELF_TEST |
cdd9148a | 2143 | selftests::register_test ("get_thread_arch_aspace_regcache", |
24b21115 | 2144 | selftests::get_thread_arch_aspace_regcache_test); |
cdd9148a SM |
2145 | selftests::register_test ("registers_changed_ptid_all", |
2146 | selftests::registers_changed_ptid_all_test); | |
b70e516e | 2147 | selftests::register_test ("registers_changed_ptid_target", |
24b21115 | 2148 | selftests::registers_changed_ptid_target_test); |
b70e516e | 2149 | selftests::register_test ("registers_changed_ptid_target_pid", |
24b21115 | 2150 | selftests::registers_changed_ptid_target_pid_test); |
cdd9148a SM |
2151 | selftests::register_test ("registers_changed_ptid_target_ptid", |
2152 | selftests::registers_changed_ptid_target_ptid_test); | |
1b30aaa5 YQ |
2153 | |
2154 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
2155 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
2156 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
2157 | selftests::cooked_write_test); | |
b161a60d SM |
2158 | selftests::register_test ("regcache_thread_ptid_changed", |
2159 | selftests::regcache_thread_ptid_changed); | |
8248946c | 2160 | #endif |
32178cab | 2161 | } |