Commit | Line | Data |
---|---|---|
32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
e2882c85 | 3 | Copyright (C) 1986-2018 Free Software Foundation, Inc. |
32178cab MS |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
32178cab MS |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
32178cab MS |
19 | |
20 | #include "defs.h" | |
32178cab MS |
21 | #include "inferior.h" |
22 | #include "target.h" | |
23 | #include "gdbarch.h" | |
705152c5 | 24 | #include "gdbcmd.h" |
4e052eda | 25 | #include "regcache.h" |
b59ff9d5 | 26 | #include "reggroups.h" |
f4c5303c | 27 | #include "observer.h" |
0b309272 | 28 | #include "regset.h" |
94bb8dfe | 29 | #include <forward_list> |
32178cab MS |
30 | |
31 | /* | |
32 | * DATA STRUCTURE | |
33 | * | |
34 | * Here is the actual register cache. | |
35 | */ | |
36 | ||
3fadccb3 | 37 | /* Per-architecture object describing the layout of a register cache. |
0df8b418 | 38 | Computed once when the architecture is created. */ |
3fadccb3 AC |
39 | |
40 | struct gdbarch_data *regcache_descr_handle; | |
41 | ||
42 | struct regcache_descr | |
43 | { | |
44 | /* The architecture this descriptor belongs to. */ | |
45 | struct gdbarch *gdbarch; | |
46 | ||
bb1db049 AC |
47 | /* The raw register cache. Each raw (or hard) register is supplied |
48 | by the target interface. The raw cache should not contain | |
49 | redundant information - if the PC is constructed from two | |
d2f0b918 | 50 | registers then those registers and not the PC lives in the raw |
bb1db049 | 51 | cache. */ |
3fadccb3 | 52 | long sizeof_raw_registers; |
3fadccb3 | 53 | |
d138e37a AC |
54 | /* The cooked register space. Each cooked register in the range |
55 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
56 | register. The remaining [NR_RAW_REGISTERS | |
02f60eae | 57 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
d138e37a | 58 | both raw registers and memory by the architecture methods |
02f60eae | 59 | gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
d138e37a | 60 | int nr_cooked_registers; |
067df2e5 | 61 | long sizeof_cooked_registers; |
d138e37a | 62 | |
86d31898 | 63 | /* Offset and size (in 8 bit bytes), of each register in the |
d138e37a | 64 | register cache. All registers (including those in the range |
99e42fd8 PA |
65 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
66 | offset. */ | |
3fadccb3 | 67 | long *register_offset; |
3fadccb3 | 68 | long *sizeof_register; |
3fadccb3 | 69 | |
bb425013 AC |
70 | /* Cached table containing the type of each register. */ |
71 | struct type **register_type; | |
3fadccb3 AC |
72 | }; |
73 | ||
3fadccb3 AC |
74 | static void * |
75 | init_regcache_descr (struct gdbarch *gdbarch) | |
76 | { | |
77 | int i; | |
78 | struct regcache_descr *descr; | |
79 | gdb_assert (gdbarch != NULL); | |
80 | ||
bb425013 | 81 | /* Create an initial, zero filled, table. */ |
116f06ea | 82 | descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
3fadccb3 | 83 | descr->gdbarch = gdbarch; |
3fadccb3 | 84 | |
d138e37a AC |
85 | /* Total size of the register space. The raw registers are mapped |
86 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 87 | either mapped onto raw-registers or memory. */ |
214e098a UW |
88 | descr->nr_cooked_registers = gdbarch_num_regs (gdbarch) |
89 | + gdbarch_num_pseudo_regs (gdbarch); | |
3fadccb3 | 90 | |
bb425013 | 91 | /* Fill in a table of register types. */ |
116f06ea | 92 | descr->register_type |
3e43a32a MS |
93 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
94 | struct type *); | |
bb425013 | 95 | for (i = 0; i < descr->nr_cooked_registers; i++) |
336a3131 | 96 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
bb425013 | 97 | |
bb1db049 AC |
98 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
99 | into the register cache. */ | |
bb1db049 | 100 | |
067df2e5 | 101 | /* Lay out the register cache. |
3fadccb3 | 102 | |
bb425013 AC |
103 | NOTE: cagney/2002-05-22: Only register_type() is used when |
104 | constructing the register cache. It is assumed that the | |
105 | register's raw size, virtual size and type length are all the | |
106 | same. */ | |
3fadccb3 AC |
107 | |
108 | { | |
109 | long offset = 0; | |
123f5f96 | 110 | |
116f06ea AC |
111 | descr->sizeof_register |
112 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
113 | descr->register_offset | |
114 | = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); | |
d999647b | 115 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
99e42fd8 PA |
116 | { |
117 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); | |
118 | descr->register_offset[i] = offset; | |
119 | offset += descr->sizeof_register[i]; | |
120 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); | |
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]; | |
123a958e | 130 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
3fadccb3 | 131 | } |
99e42fd8 | 132 | /* Set the real size of the readonly register cache buffer. */ |
067df2e5 | 133 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
134 | } |
135 | ||
3fadccb3 AC |
136 | return descr; |
137 | } | |
138 | ||
139 | static struct regcache_descr * | |
140 | regcache_descr (struct gdbarch *gdbarch) | |
141 | { | |
19ba03f4 SM |
142 | return (struct regcache_descr *) gdbarch_data (gdbarch, |
143 | regcache_descr_handle); | |
3fadccb3 AC |
144 | } |
145 | ||
bb425013 AC |
146 | /* Utility functions returning useful register attributes stored in |
147 | the regcache descr. */ | |
148 | ||
149 | struct type * | |
150 | register_type (struct gdbarch *gdbarch, int regnum) | |
151 | { | |
152 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
123f5f96 | 153 | |
bb425013 AC |
154 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
155 | return descr->register_type[regnum]; | |
156 | } | |
157 | ||
0ed04cce AC |
158 | /* Utility functions returning useful register attributes stored in |
159 | the regcache descr. */ | |
160 | ||
08a617da AC |
161 | int |
162 | register_size (struct gdbarch *gdbarch, int regnum) | |
163 | { | |
164 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
165 | int size; | |
123f5f96 | 166 | |
f57d151a | 167 | gdb_assert (regnum >= 0 |
214e098a UW |
168 | && regnum < (gdbarch_num_regs (gdbarch) |
169 | + gdbarch_num_pseudo_regs (gdbarch))); | |
08a617da | 170 | size = descr->sizeof_register[regnum]; |
08a617da AC |
171 | return size; |
172 | } | |
173 | ||
8d689ee5 YQ |
174 | /* See common/common-regcache.h. */ |
175 | ||
176 | int | |
177 | regcache_register_size (const struct regcache *regcache, int n) | |
178 | { | |
ac7936df | 179 | return register_size (regcache->arch (), n); |
8d689ee5 YQ |
180 | } |
181 | ||
31716595 YQ |
182 | reg_buffer::reg_buffer (gdbarch *gdbarch, bool has_pseudo) |
183 | : m_has_pseudo (has_pseudo) | |
3fadccb3 | 184 | { |
ef79d9a3 YQ |
185 | gdb_assert (gdbarch != NULL); |
186 | m_descr = regcache_descr (gdbarch); | |
4621115f | 187 | |
31716595 | 188 | if (has_pseudo) |
4621115f | 189 | { |
ef79d9a3 YQ |
190 | m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_cooked_registers); |
191 | m_register_status = XCNEWVEC (signed char, | |
6c5218df | 192 | m_descr->nr_cooked_registers); |
4621115f YQ |
193 | } |
194 | else | |
195 | { | |
ef79d9a3 | 196 | m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_raw_registers); |
d999647b | 197 | m_register_status = XCNEWVEC (signed char, gdbarch_num_regs (gdbarch)); |
4621115f | 198 | } |
31716595 YQ |
199 | } |
200 | ||
796bb026 YQ |
201 | regcache::regcache (gdbarch *gdbarch, const address_space *aspace_) |
202 | /* The register buffers. A read/write register cache can only hold | |
203 | [0 .. gdbarch_num_regs). */ | |
204 | : detached_regcache (gdbarch, false), m_aspace (aspace_) | |
31716595 | 205 | { |
ef79d9a3 YQ |
206 | m_ptid = minus_one_ptid; |
207 | } | |
4621115f | 208 | |
deb1fa3e YQ |
209 | static enum register_status |
210 | do_cooked_read (void *src, int regnum, gdb_byte *buf) | |
211 | { | |
212 | struct regcache *regcache = (struct regcache *) src; | |
213 | ||
214 | return regcache_cooked_read (regcache, regnum, buf); | |
215 | } | |
216 | ||
daf6667d YQ |
217 | readonly_detached_regcache::readonly_detached_regcache (const regcache &src) |
218 | : readonly_detached_regcache (src.arch (), do_cooked_read, (void *) &src) | |
219 | { | |
220 | } | |
221 | ||
ef79d9a3 | 222 | gdbarch * |
31716595 | 223 | reg_buffer::arch () const |
ef79d9a3 YQ |
224 | { |
225 | return m_descr->gdbarch; | |
226 | } | |
3fadccb3 | 227 | |
ddaaf0fb SM |
228 | /* See regcache.h. */ |
229 | ||
230 | ptid_t | |
231 | regcache_get_ptid (const struct regcache *regcache) | |
232 | { | |
ef79d9a3 | 233 | gdb_assert (!ptid_equal (regcache->ptid (), minus_one_ptid)); |
ddaaf0fb | 234 | |
ef79d9a3 | 235 | return regcache->ptid (); |
ddaaf0fb SM |
236 | } |
237 | ||
b292235f | 238 | /* Cleanup class for invalidating a register. */ |
b94ade42 | 239 | |
b292235f | 240 | class regcache_invalidator |
b94ade42 | 241 | { |
b292235f | 242 | public: |
b94ade42 | 243 | |
b292235f TT |
244 | regcache_invalidator (struct regcache *regcache, int regnum) |
245 | : m_regcache (regcache), | |
246 | m_regnum (regnum) | |
247 | { | |
248 | } | |
b94ade42 | 249 | |
b292235f TT |
250 | ~regcache_invalidator () |
251 | { | |
252 | if (m_regcache != nullptr) | |
253 | regcache_invalidate (m_regcache, m_regnum); | |
254 | } | |
b94ade42 | 255 | |
b292235f | 256 | DISABLE_COPY_AND_ASSIGN (regcache_invalidator); |
b94ade42 | 257 | |
b292235f TT |
258 | void release () |
259 | { | |
260 | m_regcache = nullptr; | |
261 | } | |
262 | ||
263 | private: | |
264 | ||
265 | struct regcache *m_regcache; | |
266 | int m_regnum; | |
267 | }; | |
b94ade42 | 268 | |
51b1fe4e AC |
269 | /* Return a pointer to register REGNUM's buffer cache. */ |
270 | ||
ef79d9a3 | 271 | gdb_byte * |
31716595 | 272 | reg_buffer::register_buffer (int regnum) const |
51b1fe4e | 273 | { |
ef79d9a3 | 274 | return m_registers + m_descr->register_offset[regnum]; |
51b1fe4e AC |
275 | } |
276 | ||
ef79d9a3 | 277 | void |
daf6667d YQ |
278 | reg_buffer::save (regcache_cooked_read_ftype *cooked_read, |
279 | void *src) | |
ef79d9a3 YQ |
280 | { |
281 | struct gdbarch *gdbarch = m_descr->gdbarch; | |
2d28509a | 282 | int regnum; |
123f5f96 | 283 | |
daf6667d YQ |
284 | /* It should have pseudo registers. */ |
285 | gdb_assert (m_has_pseudo); | |
2d28509a | 286 | /* Clear the dest. */ |
ef79d9a3 | 287 | memset (m_registers, 0, m_descr->sizeof_cooked_registers); |
6c5218df | 288 | memset (m_register_status, 0, m_descr->nr_cooked_registers); |
2d28509a | 289 | /* Copy over any registers (identified by their membership in the |
f57d151a UW |
290 | save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
291 | gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 292 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 293 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a AC |
294 | { |
295 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
296 | { | |
50d6adef AH |
297 | gdb_byte *dst_buf = register_buffer (regnum); |
298 | enum register_status status = cooked_read (src, regnum, dst_buf); | |
123f5f96 | 299 | |
50d6adef AH |
300 | gdb_assert (status != REG_UNKNOWN); |
301 | ||
302 | if (status != REG_VALID) | |
303 | memset (dst_buf, 0, register_size (gdbarch, regnum)); | |
05d1431c | 304 | |
ef79d9a3 | 305 | m_register_status[regnum] = status; |
2d28509a AC |
306 | } |
307 | } | |
308 | } | |
309 | ||
ef79d9a3 | 310 | void |
daf6667d | 311 | regcache::restore (readonly_detached_regcache *src) |
2d28509a | 312 | { |
ef79d9a3 | 313 | struct gdbarch *gdbarch = m_descr->gdbarch; |
2d28509a | 314 | int regnum; |
123f5f96 | 315 | |
fc5b8736 | 316 | gdb_assert (src != NULL); |
daf6667d | 317 | gdb_assert (src->m_has_pseudo); |
fc5b8736 YQ |
318 | |
319 | gdb_assert (gdbarch == src->arch ()); | |
320 | ||
2d28509a | 321 | /* Copy over any registers, being careful to only restore those that |
f57d151a UW |
322 | were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
323 | + gdbarch_num_pseudo_regs) range is checked since some architectures need | |
5602984a | 324 | to save/restore `cooked' registers that live in memory. */ |
ef79d9a3 | 325 | for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
2d28509a | 326 | { |
5602984a | 327 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 328 | { |
ef79d9a3 YQ |
329 | if (src->m_register_status[regnum] == REG_VALID) |
330 | cooked_write (regnum, src->register_buffer (regnum)); | |
2d28509a AC |
331 | } |
332 | } | |
333 | } | |
334 | ||
39181896 | 335 | enum register_status |
ee99023e | 336 | regcache_register_status (const struct regcache *regcache, int regnum) |
3fadccb3 AC |
337 | { |
338 | gdb_assert (regcache != NULL); | |
ef79d9a3 YQ |
339 | return regcache->get_register_status (regnum); |
340 | } | |
341 | ||
342 | enum register_status | |
c8ec2f33 | 343 | reg_buffer::get_register_status (int regnum) const |
ef79d9a3 | 344 | { |
c8ec2f33 | 345 | assert_regnum (regnum); |
6ed7ea50 | 346 | |
ef79d9a3 | 347 | return (enum register_status) m_register_status[regnum]; |
3fadccb3 AC |
348 | } |
349 | ||
9c5ea4d9 UW |
350 | void |
351 | regcache_invalidate (struct regcache *regcache, int regnum) | |
352 | { | |
353 | gdb_assert (regcache != NULL); | |
ef79d9a3 | 354 | regcache->invalidate (regnum); |
9c5ea4d9 UW |
355 | } |
356 | ||
ef79d9a3 | 357 | void |
796bb026 | 358 | detached_regcache::invalidate (int regnum) |
ef79d9a3 | 359 | { |
4e888c28 | 360 | assert_regnum (regnum); |
ef79d9a3 YQ |
361 | m_register_status[regnum] = REG_UNKNOWN; |
362 | } | |
9c5ea4d9 | 363 | |
4e888c28 | 364 | void |
31716595 | 365 | reg_buffer::assert_regnum (int regnum) const |
4e888c28 | 366 | { |
31716595 YQ |
367 | gdb_assert (regnum >= 0); |
368 | if (m_has_pseudo) | |
369 | gdb_assert (regnum < m_descr->nr_cooked_registers); | |
370 | else | |
371 | gdb_assert (regnum < gdbarch_num_regs (arch ())); | |
4e888c28 YQ |
372 | } |
373 | ||
3fadccb3 | 374 | /* Global structure containing the current regcache. */ |
3fadccb3 | 375 | |
5ebd2499 | 376 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
377 | recording if the register values have been changed (eg. by the |
378 | user). Therefore all registers must be written back to the | |
379 | target when appropriate. */ | |
e521e87e | 380 | std::forward_list<regcache *> regcache::current_regcache; |
c2250ad1 UW |
381 | |
382 | struct regcache * | |
e2d96639 YQ |
383 | get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch, |
384 | struct address_space *aspace) | |
c2250ad1 | 385 | { |
e521e87e | 386 | for (const auto ®cache : regcache::current_regcache) |
94bb8dfe YQ |
387 | if (ptid_equal (regcache->ptid (), ptid) && regcache->arch () == gdbarch) |
388 | return regcache; | |
594f7785 | 389 | |
796bb026 | 390 | regcache *new_regcache = new regcache (gdbarch, aspace); |
594f7785 | 391 | |
e521e87e | 392 | regcache::current_regcache.push_front (new_regcache); |
ef79d9a3 | 393 | new_regcache->set_ptid (ptid); |
e2d96639 | 394 | |
e2d96639 YQ |
395 | return new_regcache; |
396 | } | |
397 | ||
398 | struct regcache * | |
399 | get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) | |
400 | { | |
ed4227b7 | 401 | address_space *aspace = target_thread_address_space (ptid); |
b78974c3 | 402 | |
e2d96639 | 403 | return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace); |
594f7785 UW |
404 | } |
405 | ||
c2250ad1 UW |
406 | static ptid_t current_thread_ptid; |
407 | static struct gdbarch *current_thread_arch; | |
408 | ||
409 | struct regcache * | |
410 | get_thread_regcache (ptid_t ptid) | |
411 | { | |
412 | if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid)) | |
413 | { | |
414 | current_thread_ptid = ptid; | |
415 | current_thread_arch = target_thread_architecture (ptid); | |
416 | } | |
417 | ||
418 | return get_thread_arch_regcache (ptid, current_thread_arch); | |
419 | } | |
420 | ||
421 | struct regcache * | |
422 | get_current_regcache (void) | |
594f7785 UW |
423 | { |
424 | return get_thread_regcache (inferior_ptid); | |
425 | } | |
32178cab | 426 | |
361c8ade GB |
427 | /* See common/common-regcache.h. */ |
428 | ||
429 | struct regcache * | |
430 | get_thread_regcache_for_ptid (ptid_t ptid) | |
431 | { | |
432 | return get_thread_regcache (ptid); | |
433 | } | |
32178cab | 434 | |
f4c5303c OF |
435 | /* Observer for the target_changed event. */ |
436 | ||
2c0b251b | 437 | static void |
f4c5303c OF |
438 | regcache_observer_target_changed (struct target_ops *target) |
439 | { | |
440 | registers_changed (); | |
441 | } | |
442 | ||
5231c1fd PA |
443 | /* Update global variables old ptids to hold NEW_PTID if they were |
444 | holding OLD_PTID. */ | |
e521e87e YQ |
445 | void |
446 | regcache::regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) | |
5231c1fd | 447 | { |
e521e87e | 448 | for (auto ®cache : regcache::current_regcache) |
94bb8dfe YQ |
449 | { |
450 | if (ptid_equal (regcache->ptid (), old_ptid)) | |
451 | regcache->set_ptid (new_ptid); | |
452 | } | |
5231c1fd PA |
453 | } |
454 | ||
32178cab MS |
455 | /* Low level examining and depositing of registers. |
456 | ||
457 | The caller is responsible for making sure that the inferior is | |
458 | stopped before calling the fetching routines, or it will get | |
459 | garbage. (a change from GDB version 3, in which the caller got the | |
460 | value from the last stop). */ | |
461 | ||
462 | /* REGISTERS_CHANGED () | |
463 | ||
464 | Indicate that registers may have changed, so invalidate the cache. */ | |
465 | ||
466 | void | |
e66408ed | 467 | registers_changed_ptid (ptid_t ptid) |
32178cab | 468 | { |
e521e87e | 469 | for (auto oit = regcache::current_regcache.before_begin (), |
94bb8dfe | 470 | it = std::next (oit); |
e521e87e | 471 | it != regcache::current_regcache.end (); |
94bb8dfe | 472 | ) |
c2250ad1 | 473 | { |
94bb8dfe | 474 | if (ptid_match ((*it)->ptid (), ptid)) |
e66408ed | 475 | { |
94bb8dfe | 476 | delete *it; |
e521e87e | 477 | it = regcache::current_regcache.erase_after (oit); |
e66408ed | 478 | } |
94bb8dfe YQ |
479 | else |
480 | oit = it++; | |
c2250ad1 | 481 | } |
32178cab | 482 | |
c34fd852 | 483 | if (ptid_match (current_thread_ptid, ptid)) |
041274d8 PA |
484 | { |
485 | current_thread_ptid = null_ptid; | |
486 | current_thread_arch = NULL; | |
487 | } | |
32178cab | 488 | |
c34fd852 | 489 | if (ptid_match (inferior_ptid, ptid)) |
041274d8 PA |
490 | { |
491 | /* We just deleted the regcache of the current thread. Need to | |
492 | forget about any frames we have cached, too. */ | |
493 | reinit_frame_cache (); | |
494 | } | |
495 | } | |
c2250ad1 | 496 | |
041274d8 PA |
497 | void |
498 | registers_changed (void) | |
499 | { | |
500 | registers_changed_ptid (minus_one_ptid); | |
a5d9d57d | 501 | |
32178cab MS |
502 | /* Force cleanup of any alloca areas if using C alloca instead of |
503 | a builtin alloca. This particular call is used to clean up | |
504 | areas allocated by low level target code which may build up | |
505 | during lengthy interactions between gdb and the target before | |
506 | gdb gives control to the user (ie watchpoints). */ | |
507 | alloca (0); | |
32178cab MS |
508 | } |
509 | ||
8e368124 AH |
510 | void |
511 | regcache_raw_update (struct regcache *regcache, int regnum) | |
61a0eb5b | 512 | { |
8e368124 | 513 | gdb_assert (regcache != NULL); |
ef79d9a3 YQ |
514 | |
515 | regcache->raw_update (regnum); | |
516 | } | |
517 | ||
518 | void | |
519 | regcache::raw_update (int regnum) | |
520 | { | |
4e888c28 | 521 | assert_regnum (regnum); |
8e368124 | 522 | |
3fadccb3 AC |
523 | /* Make certain that the register cache is up-to-date with respect |
524 | to the current thread. This switching shouldn't be necessary | |
525 | only there is still only one target side register cache. Sigh! | |
526 | On the bright side, at least there is a regcache object. */ | |
8e368124 | 527 | |
796bb026 | 528 | if (get_register_status (regnum) == REG_UNKNOWN) |
3fadccb3 | 529 | { |
ef79d9a3 | 530 | target_fetch_registers (this, regnum); |
788c8b10 PA |
531 | |
532 | /* A number of targets can't access the whole set of raw | |
533 | registers (because the debug API provides no means to get at | |
534 | them). */ | |
ef79d9a3 YQ |
535 | if (m_register_status[regnum] == REG_UNKNOWN) |
536 | m_register_status[regnum] = REG_UNAVAILABLE; | |
3fadccb3 | 537 | } |
8e368124 AH |
538 | } |
539 | ||
540 | enum register_status | |
541 | regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf) | |
ef79d9a3 YQ |
542 | { |
543 | return regcache->raw_read (regnum, buf); | |
544 | } | |
545 | ||
546 | enum register_status | |
849d0ba8 | 547 | readable_regcache::raw_read (int regnum, gdb_byte *buf) |
8e368124 AH |
548 | { |
549 | gdb_assert (buf != NULL); | |
ef79d9a3 | 550 | raw_update (regnum); |
05d1431c | 551 | |
ef79d9a3 YQ |
552 | if (m_register_status[regnum] != REG_VALID) |
553 | memset (buf, 0, m_descr->sizeof_register[regnum]); | |
05d1431c | 554 | else |
ef79d9a3 YQ |
555 | memcpy (buf, register_buffer (regnum), |
556 | m_descr->sizeof_register[regnum]); | |
05d1431c | 557 | |
ef79d9a3 | 558 | return (enum register_status) m_register_status[regnum]; |
61a0eb5b AC |
559 | } |
560 | ||
05d1431c | 561 | enum register_status |
28fc6740 | 562 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
ef79d9a3 YQ |
563 | { |
564 | gdb_assert (regcache != NULL); | |
6f98355c | 565 | return regcache->raw_read (regnum, val); |
ef79d9a3 YQ |
566 | } |
567 | ||
6f98355c | 568 | template<typename T, typename> |
ef79d9a3 | 569 | enum register_status |
849d0ba8 | 570 | readable_regcache::raw_read (int regnum, T *val) |
28fc6740 | 571 | { |
2d522557 | 572 | gdb_byte *buf; |
05d1431c | 573 | enum register_status status; |
123f5f96 | 574 | |
4e888c28 | 575 | assert_regnum (regnum); |
ef79d9a3 YQ |
576 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
577 | status = raw_read (regnum, buf); | |
05d1431c | 578 | if (status == REG_VALID) |
6f98355c YQ |
579 | *val = extract_integer<T> (buf, |
580 | m_descr->sizeof_register[regnum], | |
581 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
582 | else |
583 | *val = 0; | |
584 | return status; | |
28fc6740 AC |
585 | } |
586 | ||
05d1431c | 587 | enum register_status |
28fc6740 AC |
588 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
589 | ULONGEST *val) | |
ef79d9a3 YQ |
590 | { |
591 | gdb_assert (regcache != NULL); | |
6f98355c | 592 | return regcache->raw_read (regnum, val); |
28fc6740 AC |
593 | } |
594 | ||
c00dcbe9 MK |
595 | void |
596 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
ef79d9a3 YQ |
597 | { |
598 | gdb_assert (regcache != NULL); | |
6f98355c | 599 | regcache->raw_write (regnum, val); |
ef79d9a3 YQ |
600 | } |
601 | ||
6f98355c | 602 | template<typename T, typename> |
ef79d9a3 | 603 | void |
6f98355c | 604 | regcache::raw_write (int regnum, T val) |
c00dcbe9 | 605 | { |
7c543f7b | 606 | gdb_byte *buf; |
123f5f96 | 607 | |
4e888c28 | 608 | assert_regnum (regnum); |
ef79d9a3 | 609 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
6f98355c YQ |
610 | store_integer (buf, m_descr->sizeof_register[regnum], |
611 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 612 | raw_write (regnum, buf); |
c00dcbe9 MK |
613 | } |
614 | ||
615 | void | |
616 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
617 | ULONGEST val) | |
ef79d9a3 YQ |
618 | { |
619 | gdb_assert (regcache != NULL); | |
6f98355c | 620 | regcache->raw_write (regnum, val); |
c00dcbe9 MK |
621 | } |
622 | ||
9fd15b2e YQ |
623 | LONGEST |
624 | regcache_raw_get_signed (struct regcache *regcache, int regnum) | |
625 | { | |
626 | LONGEST value; | |
627 | enum register_status status; | |
628 | ||
629 | status = regcache_raw_read_signed (regcache, regnum, &value); | |
630 | if (status == REG_UNAVAILABLE) | |
631 | throw_error (NOT_AVAILABLE_ERROR, | |
632 | _("Register %d is not available"), regnum); | |
633 | return value; | |
634 | } | |
635 | ||
05d1431c | 636 | enum register_status |
2d522557 | 637 | regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
ef79d9a3 YQ |
638 | { |
639 | return regcache->cooked_read (regnum, buf); | |
640 | } | |
641 | ||
642 | enum register_status | |
849d0ba8 | 643 | readable_regcache::cooked_read (int regnum, gdb_byte *buf) |
68365089 | 644 | { |
d138e37a | 645 | gdb_assert (regnum >= 0); |
ef79d9a3 | 646 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 647 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 648 | return raw_read (regnum, buf); |
849d0ba8 | 649 | else if (m_has_pseudo |
ef79d9a3 | 650 | && m_register_status[regnum] != REG_UNKNOWN) |
05d1431c | 651 | { |
ef79d9a3 YQ |
652 | if (m_register_status[regnum] == REG_VALID) |
653 | memcpy (buf, register_buffer (regnum), | |
654 | m_descr->sizeof_register[regnum]); | |
05d1431c | 655 | else |
ef79d9a3 | 656 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
05d1431c | 657 | |
ef79d9a3 | 658 | return (enum register_status) m_register_status[regnum]; |
05d1431c | 659 | } |
ef79d9a3 | 660 | else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
661 | { |
662 | struct value *mark, *computed; | |
663 | enum register_status result = REG_VALID; | |
664 | ||
665 | mark = value_mark (); | |
666 | ||
ef79d9a3 YQ |
667 | computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
668 | this, regnum); | |
3543a589 TT |
669 | if (value_entirely_available (computed)) |
670 | memcpy (buf, value_contents_raw (computed), | |
ef79d9a3 | 671 | m_descr->sizeof_register[regnum]); |
3543a589 TT |
672 | else |
673 | { | |
ef79d9a3 | 674 | memset (buf, 0, m_descr->sizeof_register[regnum]); |
3543a589 TT |
675 | result = REG_UNAVAILABLE; |
676 | } | |
677 | ||
678 | value_free_to_mark (mark); | |
679 | ||
680 | return result; | |
681 | } | |
d138e37a | 682 | else |
ef79d9a3 | 683 | return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
05d1431c | 684 | regnum, buf); |
61a0eb5b AC |
685 | } |
686 | ||
3543a589 TT |
687 | struct value * |
688 | regcache_cooked_read_value (struct regcache *regcache, int regnum) | |
ef79d9a3 YQ |
689 | { |
690 | return regcache->cooked_read_value (regnum); | |
691 | } | |
692 | ||
693 | struct value * | |
849d0ba8 | 694 | readable_regcache::cooked_read_value (int regnum) |
3543a589 TT |
695 | { |
696 | gdb_assert (regnum >= 0); | |
ef79d9a3 | 697 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
3543a589 | 698 | |
d999647b | 699 | if (regnum < num_raw_registers () |
849d0ba8 | 700 | || (m_has_pseudo && m_register_status[regnum] != REG_UNKNOWN) |
ef79d9a3 | 701 | || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
3543a589 TT |
702 | { |
703 | struct value *result; | |
704 | ||
ef79d9a3 | 705 | result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
3543a589 TT |
706 | VALUE_LVAL (result) = lval_register; |
707 | VALUE_REGNUM (result) = regnum; | |
708 | ||
709 | /* It is more efficient in general to do this delegation in this | |
710 | direction than in the other one, even though the value-based | |
711 | API is preferred. */ | |
ef79d9a3 YQ |
712 | if (cooked_read (regnum, |
713 | value_contents_raw (result)) == REG_UNAVAILABLE) | |
3543a589 TT |
714 | mark_value_bytes_unavailable (result, 0, |
715 | TYPE_LENGTH (value_type (result))); | |
716 | ||
717 | return result; | |
718 | } | |
719 | else | |
ef79d9a3 YQ |
720 | return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
721 | this, regnum); | |
3543a589 TT |
722 | } |
723 | ||
05d1431c | 724 | enum register_status |
a378f419 AC |
725 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
726 | LONGEST *val) | |
ef79d9a3 YQ |
727 | { |
728 | gdb_assert (regcache != NULL); | |
6f98355c | 729 | return regcache->cooked_read (regnum, val); |
ef79d9a3 YQ |
730 | } |
731 | ||
6f98355c | 732 | template<typename T, typename> |
ef79d9a3 | 733 | enum register_status |
849d0ba8 | 734 | readable_regcache::cooked_read (int regnum, T *val) |
a378f419 | 735 | { |
05d1431c | 736 | enum register_status status; |
2d522557 | 737 | gdb_byte *buf; |
123f5f96 | 738 | |
ef79d9a3 YQ |
739 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
740 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
741 | status = cooked_read (regnum, buf); | |
05d1431c | 742 | if (status == REG_VALID) |
6f98355c YQ |
743 | *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
744 | gdbarch_byte_order (m_descr->gdbarch)); | |
05d1431c PA |
745 | else |
746 | *val = 0; | |
747 | return status; | |
a378f419 AC |
748 | } |
749 | ||
05d1431c | 750 | enum register_status |
a378f419 AC |
751 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
752 | ULONGEST *val) | |
ef79d9a3 YQ |
753 | { |
754 | gdb_assert (regcache != NULL); | |
6f98355c | 755 | return regcache->cooked_read (regnum, val); |
a378f419 AC |
756 | } |
757 | ||
a66a9c23 AC |
758 | void |
759 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
760 | LONGEST val) | |
ef79d9a3 YQ |
761 | { |
762 | gdb_assert (regcache != NULL); | |
6f98355c | 763 | regcache->cooked_write (regnum, val); |
ef79d9a3 YQ |
764 | } |
765 | ||
6f98355c | 766 | template<typename T, typename> |
ef79d9a3 | 767 | void |
6f98355c | 768 | regcache::cooked_write (int regnum, T val) |
a66a9c23 | 769 | { |
7c543f7b | 770 | gdb_byte *buf; |
123f5f96 | 771 | |
ef79d9a3 YQ |
772 | gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
773 | buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); | |
6f98355c YQ |
774 | store_integer (buf, m_descr->sizeof_register[regnum], |
775 | gdbarch_byte_order (m_descr->gdbarch), val); | |
ef79d9a3 | 776 | cooked_write (regnum, buf); |
a66a9c23 AC |
777 | } |
778 | ||
779 | void | |
780 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
781 | ULONGEST val) | |
ef79d9a3 YQ |
782 | { |
783 | gdb_assert (regcache != NULL); | |
6f98355c | 784 | regcache->cooked_write (regnum, val); |
a66a9c23 AC |
785 | } |
786 | ||
61a0eb5b | 787 | void |
2d522557 AC |
788 | regcache_raw_write (struct regcache *regcache, int regnum, |
789 | const gdb_byte *buf) | |
ef79d9a3 YQ |
790 | { |
791 | gdb_assert (regcache != NULL && buf != NULL); | |
792 | regcache->raw_write (regnum, buf); | |
793 | } | |
794 | ||
795 | void | |
796 | regcache::raw_write (int regnum, const gdb_byte *buf) | |
61a0eb5b | 797 | { |
594f7785 | 798 | |
ef79d9a3 | 799 | gdb_assert (buf != NULL); |
4e888c28 | 800 | assert_regnum (regnum); |
3fadccb3 | 801 | |
3fadccb3 AC |
802 | /* On the sparc, writing %g0 is a no-op, so we don't even want to |
803 | change the registers array if something writes to this register. */ | |
ef79d9a3 | 804 | if (gdbarch_cannot_store_register (arch (), regnum)) |
3fadccb3 AC |
805 | return; |
806 | ||
3fadccb3 | 807 | /* If we have a valid copy of the register, and new value == old |
0df8b418 | 808 | value, then don't bother doing the actual store. */ |
ef79d9a3 YQ |
809 | if (get_register_status (regnum) == REG_VALID |
810 | && (memcmp (register_buffer (regnum), buf, | |
811 | m_descr->sizeof_register[regnum]) == 0)) | |
3fadccb3 AC |
812 | return; |
813 | ||
ef79d9a3 | 814 | target_prepare_to_store (this); |
c8ec2f33 | 815 | raw_supply (regnum, buf); |
b94ade42 | 816 | |
b292235f TT |
817 | /* Invalidate the register after it is written, in case of a |
818 | failure. */ | |
819 | regcache_invalidator invalidator (this, regnum); | |
b94ade42 | 820 | |
ef79d9a3 | 821 | target_store_registers (this, regnum); |
594f7785 | 822 | |
b292235f TT |
823 | /* The target did not throw an error so we can discard invalidating |
824 | the register. */ | |
825 | invalidator.release (); | |
61a0eb5b AC |
826 | } |
827 | ||
68365089 | 828 | void |
2d522557 AC |
829 | regcache_cooked_write (struct regcache *regcache, int regnum, |
830 | const gdb_byte *buf) | |
ef79d9a3 YQ |
831 | { |
832 | regcache->cooked_write (regnum, buf); | |
833 | } | |
834 | ||
835 | void | |
836 | regcache::cooked_write (int regnum, const gdb_byte *buf) | |
68365089 | 837 | { |
d138e37a | 838 | gdb_assert (regnum >= 0); |
ef79d9a3 | 839 | gdb_assert (regnum < m_descr->nr_cooked_registers); |
d999647b | 840 | if (regnum < num_raw_registers ()) |
ef79d9a3 | 841 | raw_write (regnum, buf); |
d138e37a | 842 | else |
ef79d9a3 | 843 | gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
d8124050 | 844 | regnum, buf); |
61a0eb5b AC |
845 | } |
846 | ||
06c0b04e AC |
847 | /* Perform a partial register transfer using a read, modify, write |
848 | operation. */ | |
849 | ||
850 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
851 | void *buf); | |
852 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
853 | const void *buf); | |
854 | ||
ef79d9a3 | 855 | enum register_status |
849d0ba8 YQ |
856 | readable_regcache::read_part (int regnum, int offset, int len, void *in, |
857 | bool is_raw) | |
858 | { | |
859 | struct gdbarch *gdbarch = arch (); | |
860 | gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); | |
861 | ||
862 | gdb_assert (in != NULL); | |
863 | gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); | |
864 | gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); | |
865 | /* Something to do? */ | |
866 | if (offset + len == 0) | |
867 | return REG_VALID; | |
868 | /* Read (when needed) ... */ | |
869 | enum register_status status; | |
870 | ||
871 | if (is_raw) | |
872 | status = raw_read (regnum, reg); | |
873 | else | |
874 | status = cooked_read (regnum, reg); | |
875 | if (status != REG_VALID) | |
876 | return status; | |
877 | ||
878 | /* ... modify ... */ | |
879 | memcpy (in, reg + offset, len); | |
880 | ||
881 | return REG_VALID; | |
882 | } | |
883 | ||
884 | enum register_status | |
885 | regcache::write_part (int regnum, int offset, int len, | |
d3037ba6 | 886 | const void *out, bool is_raw) |
ef79d9a3 YQ |
887 | { |
888 | struct gdbarch *gdbarch = arch (); | |
9890e433 | 889 | gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); |
123f5f96 | 890 | |
849d0ba8 | 891 | gdb_assert (out != NULL); |
ef79d9a3 YQ |
892 | gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); |
893 | gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); | |
06c0b04e AC |
894 | /* Something to do? */ |
895 | if (offset + len == 0) | |
05d1431c | 896 | return REG_VALID; |
0df8b418 | 897 | /* Read (when needed) ... */ |
849d0ba8 | 898 | if (offset > 0 |
ef79d9a3 | 899 | || offset + len < m_descr->sizeof_register[regnum]) |
06c0b04e | 900 | { |
05d1431c PA |
901 | enum register_status status; |
902 | ||
d3037ba6 YQ |
903 | if (is_raw) |
904 | status = raw_read (regnum, reg); | |
905 | else | |
906 | status = cooked_read (regnum, reg); | |
05d1431c PA |
907 | if (status != REG_VALID) |
908 | return status; | |
06c0b04e | 909 | } |
849d0ba8 YQ |
910 | |
911 | memcpy (reg + offset, out, len); | |
06c0b04e | 912 | /* ... write (when needed). */ |
849d0ba8 YQ |
913 | if (is_raw) |
914 | raw_write (regnum, reg); | |
915 | else | |
916 | cooked_write (regnum, reg); | |
05d1431c PA |
917 | |
918 | return REG_VALID; | |
06c0b04e AC |
919 | } |
920 | ||
05d1431c | 921 | enum register_status |
06c0b04e | 922 | regcache_raw_read_part (struct regcache *regcache, int regnum, |
2d522557 | 923 | int offset, int len, gdb_byte *buf) |
06c0b04e | 924 | { |
ef79d9a3 YQ |
925 | return regcache->raw_read_part (regnum, offset, len, buf); |
926 | } | |
123f5f96 | 927 | |
ef79d9a3 | 928 | enum register_status |
849d0ba8 | 929 | readable_regcache::raw_read_part (int regnum, int offset, int len, gdb_byte *buf) |
ef79d9a3 | 930 | { |
4e888c28 | 931 | assert_regnum (regnum); |
849d0ba8 | 932 | return read_part (regnum, offset, len, buf, true); |
06c0b04e AC |
933 | } |
934 | ||
935 | void | |
936 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 937 | int offset, int len, const gdb_byte *buf) |
06c0b04e | 938 | { |
ef79d9a3 YQ |
939 | regcache->raw_write_part (regnum, offset, len, buf); |
940 | } | |
123f5f96 | 941 | |
ef79d9a3 YQ |
942 | void |
943 | regcache::raw_write_part (int regnum, int offset, int len, | |
944 | const gdb_byte *buf) | |
945 | { | |
4e888c28 | 946 | assert_regnum (regnum); |
849d0ba8 | 947 | write_part (regnum, offset, len, buf, true); |
06c0b04e AC |
948 | } |
949 | ||
05d1431c | 950 | enum register_status |
06c0b04e | 951 | regcache_cooked_read_part (struct regcache *regcache, int regnum, |
2d522557 | 952 | int offset, int len, gdb_byte *buf) |
06c0b04e | 953 | { |
ef79d9a3 YQ |
954 | return regcache->cooked_read_part (regnum, offset, len, buf); |
955 | } | |
123f5f96 | 956 | |
ef79d9a3 YQ |
957 | |
958 | enum register_status | |
849d0ba8 YQ |
959 | readable_regcache::cooked_read_part (int regnum, int offset, int len, |
960 | gdb_byte *buf) | |
ef79d9a3 YQ |
961 | { |
962 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 963 | return read_part (regnum, offset, len, buf, false); |
06c0b04e AC |
964 | } |
965 | ||
966 | void | |
967 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
2d522557 | 968 | int offset, int len, const gdb_byte *buf) |
06c0b04e | 969 | { |
ef79d9a3 YQ |
970 | regcache->cooked_write_part (regnum, offset, len, buf); |
971 | } | |
123f5f96 | 972 | |
ef79d9a3 YQ |
973 | void |
974 | regcache::cooked_write_part (int regnum, int offset, int len, | |
975 | const gdb_byte *buf) | |
976 | { | |
977 | gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); | |
849d0ba8 | 978 | write_part (regnum, offset, len, buf, false); |
06c0b04e | 979 | } |
32178cab | 980 | |
a16d75cc | 981 | /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
9a661b68 MK |
982 | |
983 | void | |
6618125d | 984 | regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
ef79d9a3 YQ |
985 | { |
986 | gdb_assert (regcache != NULL); | |
987 | regcache->raw_supply (regnum, buf); | |
988 | } | |
989 | ||
990 | void | |
c8ec2f33 | 991 | detached_regcache::raw_supply (int regnum, const void *buf) |
9a661b68 MK |
992 | { |
993 | void *regbuf; | |
994 | size_t size; | |
995 | ||
4e888c28 | 996 | assert_regnum (regnum); |
9a661b68 | 997 | |
ef79d9a3 YQ |
998 | regbuf = register_buffer (regnum); |
999 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1000 | |
1001 | if (buf) | |
ee99023e PA |
1002 | { |
1003 | memcpy (regbuf, buf, size); | |
ef79d9a3 | 1004 | m_register_status[regnum] = REG_VALID; |
ee99023e | 1005 | } |
9a661b68 | 1006 | else |
ee99023e PA |
1007 | { |
1008 | /* This memset not strictly necessary, but better than garbage | |
1009 | in case the register value manages to escape somewhere (due | |
1010 | to a bug, no less). */ | |
1011 | memset (regbuf, 0, size); | |
ef79d9a3 | 1012 | m_register_status[regnum] = REG_UNAVAILABLE; |
ee99023e | 1013 | } |
9a661b68 MK |
1014 | } |
1015 | ||
b057297a AH |
1016 | /* Supply register REGNUM to REGCACHE. Value to supply is an integer stored at |
1017 | address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. If | |
1018 | the register size is greater than ADDR_LEN, then the integer will be sign or | |
1019 | zero extended. If the register size is smaller than the integer, then the | |
1020 | most significant bytes of the integer will be truncated. */ | |
1021 | ||
1022 | void | |
796bb026 YQ |
1023 | detached_regcache::raw_supply_integer (int regnum, const gdb_byte *addr, |
1024 | int addr_len, bool is_signed) | |
b057297a AH |
1025 | { |
1026 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1027 | gdb_byte *regbuf; | |
1028 | size_t regsize; | |
1029 | ||
4e888c28 | 1030 | assert_regnum (regnum); |
b057297a AH |
1031 | |
1032 | regbuf = register_buffer (regnum); | |
1033 | regsize = m_descr->sizeof_register[regnum]; | |
1034 | ||
1035 | copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, | |
1036 | byte_order); | |
1037 | m_register_status[regnum] = REG_VALID; | |
1038 | } | |
1039 | ||
f81fdd35 AH |
1040 | /* Supply register REGNUM with zeroed value to REGCACHE. This is not the same |
1041 | as calling raw_supply with NULL (which will set the state to | |
1042 | unavailable). */ | |
1043 | ||
1044 | void | |
796bb026 | 1045 | detached_regcache::raw_supply_zeroed (int regnum) |
f81fdd35 AH |
1046 | { |
1047 | void *regbuf; | |
1048 | size_t size; | |
1049 | ||
4e888c28 | 1050 | assert_regnum (regnum); |
f81fdd35 AH |
1051 | |
1052 | regbuf = register_buffer (regnum); | |
1053 | size = m_descr->sizeof_register[regnum]; | |
1054 | ||
1055 | memset (regbuf, 0, size); | |
1056 | m_register_status[regnum] = REG_VALID; | |
1057 | } | |
1058 | ||
9a661b68 MK |
1059 | /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
1060 | ||
1061 | void | |
6618125d | 1062 | regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
ef79d9a3 YQ |
1063 | { |
1064 | gdb_assert (regcache != NULL && buf != NULL); | |
1065 | regcache->raw_collect (regnum, buf); | |
1066 | } | |
1067 | ||
1068 | void | |
1069 | regcache::raw_collect (int regnum, void *buf) const | |
9a661b68 MK |
1070 | { |
1071 | const void *regbuf; | |
1072 | size_t size; | |
1073 | ||
ef79d9a3 | 1074 | gdb_assert (buf != NULL); |
4e888c28 | 1075 | assert_regnum (regnum); |
9a661b68 | 1076 | |
ef79d9a3 YQ |
1077 | regbuf = register_buffer (regnum); |
1078 | size = m_descr->sizeof_register[regnum]; | |
9a661b68 MK |
1079 | memcpy (buf, regbuf, size); |
1080 | } | |
1081 | ||
0b309272 AA |
1082 | /* Transfer a single or all registers belonging to a certain register |
1083 | set to or from a buffer. This is the main worker function for | |
1084 | regcache_supply_regset and regcache_collect_regset. */ | |
1085 | ||
b057297a AH |
1086 | /* Collect register REGNUM from REGCACHE. Store collected value as an integer |
1087 | at address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. | |
1088 | If ADDR_LEN is greater than the register size, then the integer will be sign | |
1089 | or zero extended. If ADDR_LEN is smaller than the register size, then the | |
1090 | most significant bytes of the integer will be truncated. */ | |
1091 | ||
1092 | void | |
1093 | regcache::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, | |
1094 | bool is_signed) const | |
1095 | { | |
1096 | enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); | |
1097 | const gdb_byte *regbuf; | |
1098 | size_t regsize; | |
1099 | ||
4e888c28 | 1100 | assert_regnum (regnum); |
b057297a AH |
1101 | |
1102 | regbuf = register_buffer (regnum); | |
1103 | regsize = m_descr->sizeof_register[regnum]; | |
1104 | ||
1105 | copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, | |
1106 | byte_order); | |
1107 | } | |
1108 | ||
ef79d9a3 YQ |
1109 | void |
1110 | regcache::transfer_regset (const struct regset *regset, | |
1111 | struct regcache *out_regcache, | |
1112 | int regnum, const void *in_buf, | |
1113 | void *out_buf, size_t size) const | |
0b309272 AA |
1114 | { |
1115 | const struct regcache_map_entry *map; | |
1116 | int offs = 0, count; | |
1117 | ||
19ba03f4 SM |
1118 | for (map = (const struct regcache_map_entry *) regset->regmap; |
1119 | (count = map->count) != 0; | |
1120 | map++) | |
0b309272 AA |
1121 | { |
1122 | int regno = map->regno; | |
1123 | int slot_size = map->size; | |
1124 | ||
1125 | if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) | |
ef79d9a3 | 1126 | slot_size = m_descr->sizeof_register[regno]; |
0b309272 AA |
1127 | |
1128 | if (regno == REGCACHE_MAP_SKIP | |
1129 | || (regnum != -1 | |
1130 | && (regnum < regno || regnum >= regno + count))) | |
1131 | offs += count * slot_size; | |
1132 | ||
1133 | else if (regnum == -1) | |
1134 | for (; count--; regno++, offs += slot_size) | |
1135 | { | |
1136 | if (offs + slot_size > size) | |
1137 | break; | |
1138 | ||
1139 | if (out_buf) | |
ef79d9a3 | 1140 | raw_collect (regno, (gdb_byte *) out_buf + offs); |
0b309272 | 1141 | else |
ef79d9a3 YQ |
1142 | out_regcache->raw_supply (regno, in_buf |
1143 | ? (const gdb_byte *) in_buf + offs | |
1144 | : NULL); | |
0b309272 AA |
1145 | } |
1146 | else | |
1147 | { | |
1148 | /* Transfer a single register and return. */ | |
1149 | offs += (regnum - regno) * slot_size; | |
1150 | if (offs + slot_size > size) | |
1151 | return; | |
1152 | ||
1153 | if (out_buf) | |
ef79d9a3 | 1154 | raw_collect (regnum, (gdb_byte *) out_buf + offs); |
0b309272 | 1155 | else |
ef79d9a3 YQ |
1156 | out_regcache->raw_supply (regnum, in_buf |
1157 | ? (const gdb_byte *) in_buf + offs | |
1158 | : NULL); | |
0b309272 AA |
1159 | return; |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | /* Supply register REGNUM from BUF to REGCACHE, using the register map | |
1165 | in REGSET. If REGNUM is -1, do this for all registers in REGSET. | |
1166 | If BUF is NULL, set the register(s) to "unavailable" status. */ | |
1167 | ||
1168 | void | |
1169 | regcache_supply_regset (const struct regset *regset, | |
1170 | struct regcache *regcache, | |
1171 | int regnum, const void *buf, size_t size) | |
1172 | { | |
ef79d9a3 YQ |
1173 | regcache->supply_regset (regset, regnum, buf, size); |
1174 | } | |
1175 | ||
1176 | void | |
1177 | regcache::supply_regset (const struct regset *regset, | |
1178 | int regnum, const void *buf, size_t size) | |
1179 | { | |
1180 | transfer_regset (regset, this, regnum, buf, NULL, size); | |
0b309272 AA |
1181 | } |
1182 | ||
1183 | /* Collect register REGNUM from REGCACHE to BUF, using the register | |
1184 | map in REGSET. If REGNUM is -1, do this for all registers in | |
1185 | REGSET. */ | |
1186 | ||
1187 | void | |
1188 | regcache_collect_regset (const struct regset *regset, | |
1189 | const struct regcache *regcache, | |
1190 | int regnum, void *buf, size_t size) | |
1191 | { | |
ef79d9a3 YQ |
1192 | regcache->collect_regset (regset, regnum, buf, size); |
1193 | } | |
1194 | ||
1195 | void | |
1196 | regcache::collect_regset (const struct regset *regset, | |
1197 | int regnum, void *buf, size_t size) const | |
1198 | { | |
1199 | transfer_regset (regset, NULL, regnum, NULL, buf, size); | |
0b309272 AA |
1200 | } |
1201 | ||
193cb69f | 1202 | |
515630c5 | 1203 | /* Special handling for register PC. */ |
32178cab MS |
1204 | |
1205 | CORE_ADDR | |
515630c5 | 1206 | regcache_read_pc (struct regcache *regcache) |
32178cab | 1207 | { |
ac7936df | 1208 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1209 | |
32178cab MS |
1210 | CORE_ADDR pc_val; |
1211 | ||
61a1198a UW |
1212 | if (gdbarch_read_pc_p (gdbarch)) |
1213 | pc_val = gdbarch_read_pc (gdbarch, regcache); | |
cde9ea48 | 1214 | /* Else use per-frame method on get_current_frame. */ |
214e098a | 1215 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
cde9ea48 | 1216 | { |
61a1198a | 1217 | ULONGEST raw_val; |
123f5f96 | 1218 | |
05d1431c PA |
1219 | if (regcache_cooked_read_unsigned (regcache, |
1220 | gdbarch_pc_regnum (gdbarch), | |
1221 | &raw_val) == REG_UNAVAILABLE) | |
1222 | throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); | |
1223 | ||
214e098a | 1224 | pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
cde9ea48 AC |
1225 | } |
1226 | else | |
515630c5 UW |
1227 | internal_error (__FILE__, __LINE__, |
1228 | _("regcache_read_pc: Unable to find PC")); | |
32178cab MS |
1229 | return pc_val; |
1230 | } | |
1231 | ||
32178cab | 1232 | void |
515630c5 | 1233 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
32178cab | 1234 | { |
ac7936df | 1235 | struct gdbarch *gdbarch = regcache->arch (); |
61a1198a | 1236 | |
61a1198a UW |
1237 | if (gdbarch_write_pc_p (gdbarch)) |
1238 | gdbarch_write_pc (gdbarch, regcache, pc); | |
214e098a | 1239 | else if (gdbarch_pc_regnum (gdbarch) >= 0) |
3e8c568d | 1240 | regcache_cooked_write_unsigned (regcache, |
214e098a | 1241 | gdbarch_pc_regnum (gdbarch), pc); |
61a1198a UW |
1242 | else |
1243 | internal_error (__FILE__, __LINE__, | |
515630c5 | 1244 | _("regcache_write_pc: Unable to update PC")); |
edb3359d DJ |
1245 | |
1246 | /* Writing the PC (for instance, from "load") invalidates the | |
1247 | current frame. */ | |
1248 | reinit_frame_cache (); | |
32178cab MS |
1249 | } |
1250 | ||
d999647b | 1251 | int |
31716595 | 1252 | reg_buffer::num_raw_registers () const |
d999647b YQ |
1253 | { |
1254 | return gdbarch_num_regs (arch ()); | |
1255 | } | |
1256 | ||
ed771251 | 1257 | void |
ef79d9a3 | 1258 | regcache::debug_print_register (const char *func, int regno) |
ed771251 | 1259 | { |
ef79d9a3 | 1260 | struct gdbarch *gdbarch = arch (); |
ed771251 AH |
1261 | |
1262 | fprintf_unfiltered (gdb_stdlog, "%s ", func); | |
1263 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) | |
1264 | && gdbarch_register_name (gdbarch, regno) != NULL | |
1265 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
1266 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
1267 | gdbarch_register_name (gdbarch, regno)); | |
1268 | else | |
1269 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
1270 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) | |
1271 | { | |
1272 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1273 | int size = register_size (gdbarch, regno); | |
ef79d9a3 | 1274 | gdb_byte *buf = register_buffer (regno); |
ed771251 AH |
1275 | |
1276 | fprintf_unfiltered (gdb_stdlog, " = "); | |
1277 | for (int i = 0; i < size; i++) | |
1278 | { | |
1279 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
1280 | } | |
1281 | if (size <= sizeof (LONGEST)) | |
1282 | { | |
1283 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); | |
1284 | ||
1285 | fprintf_unfiltered (gdb_stdlog, " %s %s", | |
1286 | core_addr_to_string_nz (val), plongest (val)); | |
1287 | } | |
1288 | } | |
1289 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1290 | } | |
32178cab | 1291 | |
705152c5 | 1292 | static void |
0b39b52e | 1293 | reg_flush_command (const char *command, int from_tty) |
705152c5 MS |
1294 | { |
1295 | /* Force-flush the register cache. */ | |
1296 | registers_changed (); | |
1297 | if (from_tty) | |
a3f17187 | 1298 | printf_filtered (_("Register cache flushed.\n")); |
705152c5 MS |
1299 | } |
1300 | ||
4c74fe6b YQ |
1301 | void |
1302 | register_dump::dump (ui_file *file) | |
af030b9a | 1303 | { |
4c74fe6b YQ |
1304 | auto descr = regcache_descr (m_gdbarch); |
1305 | int regnum; | |
1306 | int footnote_nr = 0; | |
1307 | int footnote_register_offset = 0; | |
1308 | int footnote_register_type_name_null = 0; | |
1309 | long register_offset = 0; | |
af030b9a | 1310 | |
4c74fe6b YQ |
1311 | gdb_assert (descr->nr_cooked_registers |
1312 | == (gdbarch_num_regs (m_gdbarch) | |
1313 | + gdbarch_num_pseudo_regs (m_gdbarch))); | |
af030b9a | 1314 | |
4c74fe6b YQ |
1315 | for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++) |
1316 | { | |
1317 | /* Name. */ | |
1318 | if (regnum < 0) | |
1319 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1320 | else | |
1321 | { | |
1322 | const char *p = gdbarch_register_name (m_gdbarch, regnum); | |
123f5f96 | 1323 | |
4c74fe6b YQ |
1324 | if (p == NULL) |
1325 | p = ""; | |
1326 | else if (p[0] == '\0') | |
1327 | p = "''"; | |
1328 | fprintf_unfiltered (file, " %-10s", p); | |
1329 | } | |
af030b9a | 1330 | |
4c74fe6b YQ |
1331 | /* Number. */ |
1332 | if (regnum < 0) | |
1333 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1334 | else | |
1335 | fprintf_unfiltered (file, " %4d", regnum); | |
af030b9a | 1336 | |
4c74fe6b YQ |
1337 | /* Relative number. */ |
1338 | if (regnum < 0) | |
1339 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1340 | else if (regnum < gdbarch_num_regs (m_gdbarch)) | |
1341 | fprintf_unfiltered (file, " %4d", regnum); | |
1342 | else | |
1343 | fprintf_unfiltered (file, " %4d", | |
1344 | (regnum - gdbarch_num_regs (m_gdbarch))); | |
af030b9a | 1345 | |
4c74fe6b YQ |
1346 | /* Offset. */ |
1347 | if (regnum < 0) | |
1348 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1349 | else | |
af030b9a | 1350 | { |
4c74fe6b YQ |
1351 | fprintf_unfiltered (file, " %6ld", |
1352 | descr->register_offset[regnum]); | |
1353 | if (register_offset != descr->register_offset[regnum] | |
1354 | || (regnum > 0 | |
1355 | && (descr->register_offset[regnum] | |
1356 | != (descr->register_offset[regnum - 1] | |
1357 | + descr->sizeof_register[regnum - 1]))) | |
1358 | ) | |
af030b9a | 1359 | { |
4c74fe6b YQ |
1360 | if (!footnote_register_offset) |
1361 | footnote_register_offset = ++footnote_nr; | |
1362 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
af030b9a | 1363 | } |
4c74fe6b YQ |
1364 | else |
1365 | fprintf_unfiltered (file, " "); | |
1366 | register_offset = (descr->register_offset[regnum] | |
1367 | + descr->sizeof_register[regnum]); | |
af030b9a AC |
1368 | } |
1369 | ||
4c74fe6b YQ |
1370 | /* Size. */ |
1371 | if (regnum < 0) | |
1372 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1373 | else | |
1374 | fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]); | |
f3384e66 | 1375 | |
4c74fe6b | 1376 | /* Type. */ |
f3384e66 | 1377 | { |
4c74fe6b YQ |
1378 | const char *t; |
1379 | std::string name_holder; | |
b59ff9d5 | 1380 | |
4c74fe6b YQ |
1381 | if (regnum < 0) |
1382 | t = "Type"; | |
215c69dc YQ |
1383 | else |
1384 | { | |
4c74fe6b | 1385 | static const char blt[] = "builtin_type"; |
123f5f96 | 1386 | |
4c74fe6b YQ |
1387 | t = TYPE_NAME (register_type (m_gdbarch, regnum)); |
1388 | if (t == NULL) | |
f3384e66 | 1389 | { |
4c74fe6b YQ |
1390 | if (!footnote_register_type_name_null) |
1391 | footnote_register_type_name_null = ++footnote_nr; | |
1392 | name_holder = string_printf ("*%d", | |
1393 | footnote_register_type_name_null); | |
1394 | t = name_holder.c_str (); | |
f3384e66 | 1395 | } |
4c74fe6b YQ |
1396 | /* Chop a leading builtin_type. */ |
1397 | if (startswith (t, blt)) | |
1398 | t += strlen (blt); | |
f3384e66 | 1399 | } |
4c74fe6b | 1400 | fprintf_unfiltered (file, " %-15s", t); |
f3384e66 | 1401 | } |
f3384e66 | 1402 | |
4c74fe6b YQ |
1403 | /* Leading space always present. */ |
1404 | fprintf_unfiltered (file, " "); | |
af030b9a | 1405 | |
4c74fe6b | 1406 | dump_reg (file, regnum); |
ed4227b7 | 1407 | |
4c74fe6b | 1408 | fprintf_unfiltered (file, "\n"); |
ed4227b7 PA |
1409 | } |
1410 | ||
4c74fe6b YQ |
1411 | if (footnote_register_offset) |
1412 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1413 | footnote_register_offset); | |
1414 | if (footnote_register_type_name_null) | |
1415 | fprintf_unfiltered (file, | |
1416 | "*%d: Register type's name NULL.\n", | |
1417 | footnote_register_type_name_null); | |
c21236dc PA |
1418 | } |
1419 | ||
8248946c YQ |
1420 | #if GDB_SELF_TEST |
1421 | #include "selftest.h" | |
1b30aaa5 YQ |
1422 | #include "selftest-arch.h" |
1423 | #include "gdbthread.h" | |
ec7a5fcb | 1424 | #include "target-float.h" |
8248946c YQ |
1425 | |
1426 | namespace selftests { | |
1427 | ||
e521e87e | 1428 | class regcache_access : public regcache |
8248946c | 1429 | { |
e521e87e YQ |
1430 | public: |
1431 | ||
1432 | /* Return the number of elements in current_regcache. */ | |
1433 | ||
1434 | static size_t | |
1435 | current_regcache_size () | |
1436 | { | |
1437 | return std::distance (regcache::current_regcache.begin (), | |
1438 | regcache::current_regcache.end ()); | |
1439 | } | |
1440 | }; | |
8248946c YQ |
1441 | |
1442 | static void | |
1443 | current_regcache_test (void) | |
1444 | { | |
1445 | /* It is empty at the start. */ | |
e521e87e | 1446 | SELF_CHECK (regcache_access::current_regcache_size () == 0); |
8248946c YQ |
1447 | |
1448 | ptid_t ptid1 (1), ptid2 (2), ptid3 (3); | |
1449 | ||
1450 | /* Get regcache from ptid1, a new regcache is added to | |
1451 | current_regcache. */ | |
1452 | regcache *regcache = get_thread_arch_aspace_regcache (ptid1, | |
1453 | target_gdbarch (), | |
1454 | NULL); | |
1455 | ||
1456 | SELF_CHECK (regcache != NULL); | |
1457 | SELF_CHECK (regcache->ptid () == ptid1); | |
e521e87e | 1458 | SELF_CHECK (regcache_access::current_regcache_size () == 1); |
8248946c YQ |
1459 | |
1460 | /* Get regcache from ptid2, a new regcache is added to | |
1461 | current_regcache. */ | |
1462 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1463 | target_gdbarch (), | |
1464 | NULL); | |
1465 | SELF_CHECK (regcache != NULL); | |
1466 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1467 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1468 | |
1469 | /* Get regcache from ptid3, a new regcache is added to | |
1470 | current_regcache. */ | |
1471 | regcache = get_thread_arch_aspace_regcache (ptid3, | |
1472 | target_gdbarch (), | |
1473 | NULL); | |
1474 | SELF_CHECK (regcache != NULL); | |
1475 | SELF_CHECK (regcache->ptid () == ptid3); | |
e521e87e | 1476 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1477 | |
1478 | /* Get regcache from ptid2 again, nothing is added to | |
1479 | current_regcache. */ | |
1480 | regcache = get_thread_arch_aspace_regcache (ptid2, | |
1481 | target_gdbarch (), | |
1482 | NULL); | |
1483 | SELF_CHECK (regcache != NULL); | |
1484 | SELF_CHECK (regcache->ptid () == ptid2); | |
e521e87e | 1485 | SELF_CHECK (regcache_access::current_regcache_size () == 3); |
8248946c YQ |
1486 | |
1487 | /* Mark ptid2 is changed, so regcache of ptid2 should be removed from | |
1488 | current_regcache. */ | |
1489 | registers_changed_ptid (ptid2); | |
e521e87e | 1490 | SELF_CHECK (regcache_access::current_regcache_size () == 2); |
8248946c YQ |
1491 | } |
1492 | ||
1b30aaa5 YQ |
1493 | static void test_target_fetch_registers (target_ops *self, regcache *regs, |
1494 | int regno); | |
1495 | static void test_target_store_registers (target_ops *self, regcache *regs, | |
1496 | int regno); | |
1497 | static enum target_xfer_status | |
1498 | test_target_xfer_partial (struct target_ops *ops, | |
1499 | enum target_object object, | |
1500 | const char *annex, gdb_byte *readbuf, | |
1501 | const gdb_byte *writebuf, | |
1502 | ULONGEST offset, ULONGEST len, | |
1503 | ULONGEST *xfered_len); | |
1504 | ||
1505 | class target_ops_no_register : public test_target_ops | |
1506 | { | |
1507 | public: | |
1508 | target_ops_no_register () | |
1509 | : test_target_ops {} | |
1510 | { | |
1511 | to_fetch_registers = test_target_fetch_registers; | |
1512 | to_store_registers = test_target_store_registers; | |
1513 | to_xfer_partial = test_target_xfer_partial; | |
1514 | ||
1515 | to_data = this; | |
1516 | } | |
1517 | ||
1518 | void reset () | |
1519 | { | |
1520 | fetch_registers_called = 0; | |
1521 | store_registers_called = 0; | |
1522 | xfer_partial_called = 0; | |
1523 | } | |
1524 | ||
1525 | unsigned int fetch_registers_called = 0; | |
1526 | unsigned int store_registers_called = 0; | |
1527 | unsigned int xfer_partial_called = 0; | |
1528 | }; | |
1529 | ||
1530 | static void | |
1531 | test_target_fetch_registers (target_ops *self, regcache *regs, int regno) | |
1532 | { | |
1533 | auto ops = static_cast<target_ops_no_register *> (self->to_data); | |
1534 | ||
1535 | /* Mark register available. */ | |
1536 | regs->raw_supply_zeroed (regno); | |
1537 | ops->fetch_registers_called++; | |
1538 | } | |
1539 | ||
1540 | static void | |
1541 | test_target_store_registers (target_ops *self, regcache *regs, int regno) | |
1542 | { | |
1543 | auto ops = static_cast<target_ops_no_register *> (self->to_data); | |
1544 | ||
1545 | ops->store_registers_called++; | |
1546 | } | |
1547 | ||
1548 | static enum target_xfer_status | |
1549 | test_target_xfer_partial (struct target_ops *self, enum target_object object, | |
1550 | const char *annex, gdb_byte *readbuf, | |
1551 | const gdb_byte *writebuf, | |
1552 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
1553 | { | |
1554 | auto ops = static_cast<target_ops_no_register *> (self->to_data); | |
1555 | ||
1556 | ops->xfer_partial_called++; | |
1557 | ||
1558 | *xfered_len = len; | |
1559 | return TARGET_XFER_OK; | |
1560 | } | |
1561 | ||
1562 | class readwrite_regcache : public regcache | |
1563 | { | |
1564 | public: | |
1565 | readwrite_regcache (struct gdbarch *gdbarch) | |
796bb026 | 1566 | : regcache (gdbarch, nullptr) |
1b30aaa5 YQ |
1567 | {} |
1568 | }; | |
1569 | ||
1570 | /* Test regcache::cooked_read gets registers from raw registers and | |
1571 | memory instead of target to_{fetch,store}_registers. */ | |
1572 | ||
1573 | static void | |
1574 | cooked_read_test (struct gdbarch *gdbarch) | |
1575 | { | |
1576 | /* Error out if debugging something, because we're going to push the | |
1577 | test target, which would pop any existing target. */ | |
1578 | if (current_target.to_stratum >= process_stratum) | |
1579 | error (_("target already pushed")); | |
1580 | ||
1581 | /* Create a mock environment. An inferior with a thread, with a | |
1582 | process_stratum target pushed. */ | |
1583 | ||
1584 | target_ops_no_register mock_target; | |
1585 | ptid_t mock_ptid (1, 1); | |
1586 | inferior mock_inferior (mock_ptid.pid ()); | |
1587 | address_space mock_aspace {}; | |
1588 | mock_inferior.gdbarch = gdbarch; | |
1589 | mock_inferior.aspace = &mock_aspace; | |
1590 | thread_info mock_thread (&mock_inferior, mock_ptid); | |
1591 | ||
1592 | scoped_restore restore_thread_list | |
1593 | = make_scoped_restore (&thread_list, &mock_thread); | |
1594 | ||
1595 | /* Add the mock inferior to the inferior list so that look ups by | |
1596 | target+ptid can find it. */ | |
1597 | scoped_restore restore_inferior_list | |
1598 | = make_scoped_restore (&inferior_list); | |
1599 | inferior_list = &mock_inferior; | |
1600 | ||
1601 | /* Switch to the mock inferior. */ | |
1602 | scoped_restore_current_inferior restore_current_inferior; | |
1603 | set_current_inferior (&mock_inferior); | |
1604 | ||
1605 | /* Push the process_stratum target so we can mock accessing | |
1606 | registers. */ | |
1607 | push_target (&mock_target); | |
1608 | ||
1609 | /* Pop it again on exit (return/exception). */ | |
1610 | struct on_exit | |
1611 | { | |
1612 | ~on_exit () | |
1613 | { | |
1614 | pop_all_targets_at_and_above (process_stratum); | |
1615 | } | |
1616 | } pop_targets; | |
1617 | ||
1618 | /* Switch to the mock thread. */ | |
1619 | scoped_restore restore_inferior_ptid | |
1620 | = make_scoped_restore (&inferior_ptid, mock_ptid); | |
1621 | ||
1622 | /* Test that read one raw register from regcache_no_target will go | |
1623 | to the target layer. */ | |
1624 | int regnum; | |
1625 | ||
1626 | /* Find a raw register which size isn't zero. */ | |
1627 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) | |
1628 | { | |
1629 | if (register_size (gdbarch, regnum) != 0) | |
1630 | break; | |
1631 | } | |
1632 | ||
1633 | readwrite_regcache readwrite (gdbarch); | |
1634 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1635 | ||
1636 | readwrite.raw_read (regnum, buf.data ()); | |
1637 | ||
1638 | /* raw_read calls target_fetch_registers. */ | |
1639 | SELF_CHECK (mock_target.fetch_registers_called > 0); | |
1640 | mock_target.reset (); | |
1641 | ||
1642 | /* Mark all raw registers valid, so the following raw registers | |
1643 | accesses won't go to target. */ | |
1644 | for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
1645 | readwrite.raw_update (i); | |
1646 | ||
1647 | mock_target.reset (); | |
1648 | /* Then, read all raw and pseudo registers, and don't expect calling | |
1649 | to_{fetch,store}_registers. */ | |
1650 | for (int regnum = 0; | |
1651 | regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); | |
1652 | regnum++) | |
1653 | { | |
1654 | if (register_size (gdbarch, regnum) == 0) | |
1655 | continue; | |
1656 | ||
1657 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1658 | ||
1659 | SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, buf.data ())); | |
1660 | ||
dc711524 YQ |
1661 | SELF_CHECK (mock_target.fetch_registers_called == 0); |
1662 | SELF_CHECK (mock_target.store_registers_called == 0); | |
1b30aaa5 YQ |
1663 | |
1664 | /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */ | |
1665 | if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu) | |
1666 | SELF_CHECK (mock_target.xfer_partial_called == 0); | |
1667 | ||
1668 | mock_target.reset (); | |
1669 | } | |
a63f2d2f | 1670 | |
215c69dc | 1671 | readonly_detached_regcache readonly (readwrite); |
a63f2d2f YQ |
1672 | |
1673 | /* GDB may go to target layer to fetch all registers and memory for | |
1674 | readonly regcache. */ | |
1675 | mock_target.reset (); | |
1676 | ||
1677 | for (int regnum = 0; | |
1678 | regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); | |
1679 | regnum++) | |
1680 | { | |
a63f2d2f YQ |
1681 | if (register_size (gdbarch, regnum) == 0) |
1682 | continue; | |
1683 | ||
1684 | gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum)); | |
1685 | enum register_status status = readonly.cooked_read (regnum, | |
1686 | buf.data ()); | |
1687 | ||
1688 | if (regnum < gdbarch_num_regs (gdbarch)) | |
1689 | { | |
1690 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1691 | ||
1692 | if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300 | |
1693 | || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh | |
1694 | || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850 | |
1695 | || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep | |
1696 | || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850 | |
1697 | || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300 | |
1698 | || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score) | |
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. */ | |
1751 | if (current_target.to_stratum >= process_stratum) | |
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 | ||
1771 | readwrite_regcache readwrite (gdbarch); | |
1772 | ||
1773 | const int num_regs = (gdbarch_num_regs (gdbarch) | |
1774 | + gdbarch_num_pseudo_regs (gdbarch)); | |
1775 | ||
1776 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
1777 | { | |
1778 | if (register_size (gdbarch, regnum) == 0 | |
1779 | || gdbarch_cannot_store_register (gdbarch, regnum)) | |
1780 | continue; | |
1781 | ||
1782 | auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch; | |
1783 | ||
1784 | if ((bfd_arch == bfd_arch_sparc | |
1785 | /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM, | |
1786 | SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */ | |
1787 | && gdbarch_ptr_bit (gdbarch) == 64 | |
1788 | && (regnum >= gdbarch_num_regs (gdbarch) | |
1789 | && regnum <= gdbarch_num_regs (gdbarch) + 4)) | |
1790 | || (bfd_arch == bfd_arch_sh | |
1791 | /* FPSCR_C_REGNUM in sh64 is hard to test. */ | |
1792 | && gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh5 | |
1793 | && regnum == 243) | |
1794 | || (bfd_arch == bfd_arch_spu | |
1795 | /* SPU pseudo registers except SPU_SP_REGNUM are got by | |
1796 | TARGET_OBJECT_SPU. */ | |
1797 | && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130)) | |
1798 | continue; | |
1799 | ||
1800 | std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0); | |
1801 | std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0); | |
1802 | const auto type = register_type (gdbarch, regnum); | |
1803 | ||
1804 | if (TYPE_CODE (type) == TYPE_CODE_FLT | |
1805 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
1806 | { | |
1807 | /* Generate valid float format. */ | |
1808 | target_float_from_string (expected.data (), type, "1.25"); | |
1809 | } | |
1810 | else if (TYPE_CODE (type) == TYPE_CODE_INT | |
1811 | || TYPE_CODE (type) == TYPE_CODE_ARRAY | |
1812 | || TYPE_CODE (type) == TYPE_CODE_PTR | |
1813 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
1814 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
1815 | { | |
1816 | if (bfd_arch == bfd_arch_ia64 | |
1817 | || (regnum >= gdbarch_num_regs (gdbarch) | |
1818 | && (bfd_arch == bfd_arch_xtensa | |
1819 | || bfd_arch == bfd_arch_bfin | |
1820 | || bfd_arch == bfd_arch_m32c | |
1821 | /* m68hc11 pseudo registers are in memory. */ | |
1822 | || bfd_arch == bfd_arch_m68hc11 | |
1823 | || bfd_arch == bfd_arch_m68hc12 | |
1824 | || bfd_arch == bfd_arch_s390)) | |
1825 | || (bfd_arch == bfd_arch_frv | |
1826 | /* FRV pseudo registers except iacc0. */ | |
1827 | && regnum > gdbarch_num_regs (gdbarch))) | |
1828 | { | |
1829 | /* Skip setting the expected values for some architecture | |
1830 | registers. */ | |
1831 | } | |
1832 | else if (bfd_arch == bfd_arch_rl78 && regnum == 40) | |
1833 | { | |
1834 | /* RL78_PC_REGNUM */ | |
1835 | for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++) | |
1836 | expected[j] = j; | |
1837 | } | |
1838 | else | |
1839 | { | |
1840 | for (auto j = 0; j < register_size (gdbarch, regnum); j++) | |
1841 | expected[j] = j; | |
1842 | } | |
1843 | } | |
1844 | else if (TYPE_CODE (type) == TYPE_CODE_FLAGS) | |
1845 | { | |
1846 | /* No idea how to test flags. */ | |
1847 | continue; | |
1848 | } | |
1849 | else | |
1850 | { | |
1851 | /* If we don't know how to create the expected value for the | |
1852 | this type, make it fail. */ | |
1853 | SELF_CHECK (0); | |
1854 | } | |
1855 | ||
1856 | readwrite.cooked_write (regnum, expected.data ()); | |
1857 | ||
1858 | SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID); | |
1859 | SELF_CHECK (expected == buf); | |
1860 | } | |
1861 | } | |
1862 | ||
8248946c YQ |
1863 | } // namespace selftests |
1864 | #endif /* GDB_SELF_TEST */ | |
1865 | ||
32178cab MS |
1866 | void |
1867 | _initialize_regcache (void) | |
1868 | { | |
3e43a32a MS |
1869 | regcache_descr_handle |
1870 | = gdbarch_data_register_post_init (init_regcache_descr); | |
705152c5 | 1871 | |
f4c5303c | 1872 | observer_attach_target_changed (regcache_observer_target_changed); |
e521e87e | 1873 | observer_attach_thread_ptid_changed (regcache::regcache_thread_ptid_changed); |
f4c5303c | 1874 | |
705152c5 | 1875 | add_com ("flushregs", class_maintenance, reg_flush_command, |
1bedd215 | 1876 | _("Force gdb to flush its register cache (maintainer command)")); |
39f77062 | 1877 | |
8248946c | 1878 | #if GDB_SELF_TEST |
1526853e | 1879 | selftests::register_test ("current_regcache", selftests::current_regcache_test); |
1b30aaa5 YQ |
1880 | |
1881 | selftests::register_test_foreach_arch ("regcache::cooked_read_test", | |
1882 | selftests::cooked_read_test); | |
ec7a5fcb YQ |
1883 | selftests::register_test_foreach_arch ("regcache::cooked_write_test", |
1884 | selftests::cooked_write_test); | |
8248946c | 1885 | #endif |
32178cab | 1886 | } |