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32178cab | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, | |
4 | 2001, 2002 Free Software Foundation, Inc. | |
32178cab MS |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
32178cab MS |
24 | #include "inferior.h" |
25 | #include "target.h" | |
26 | #include "gdbarch.h" | |
705152c5 | 27 | #include "gdbcmd.h" |
4e052eda | 28 | #include "regcache.h" |
b59ff9d5 | 29 | #include "reggroups.h" |
61a0eb5b | 30 | #include "gdb_assert.h" |
b66d6d2e | 31 | #include "gdb_string.h" |
af030b9a | 32 | #include "gdbcmd.h" /* For maintenanceprintlist. */ |
32178cab MS |
33 | |
34 | /* | |
35 | * DATA STRUCTURE | |
36 | * | |
37 | * Here is the actual register cache. | |
38 | */ | |
39 | ||
3fadccb3 AC |
40 | /* Per-architecture object describing the layout of a register cache. |
41 | Computed once when the architecture is created */ | |
42 | ||
43 | struct gdbarch_data *regcache_descr_handle; | |
44 | ||
45 | struct regcache_descr | |
46 | { | |
47 | /* The architecture this descriptor belongs to. */ | |
48 | struct gdbarch *gdbarch; | |
49 | ||
50 | /* Is this a ``legacy'' register cache? Such caches reserve space | |
51 | for raw and pseudo registers and allow access to both. */ | |
52 | int legacy_p; | |
53 | ||
54 | /* The raw register cache. This should contain just [0 | |
55 | .. NUM_RAW_REGISTERS). However, for older targets, it contains | |
56 | space for the full [0 .. NUM_RAW_REGISTERS + | |
57 | NUM_PSEUDO_REGISTERS). */ | |
58 | int nr_raw_registers; | |
59 | long sizeof_raw_registers; | |
60 | long sizeof_raw_register_valid_p; | |
61 | ||
d138e37a AC |
62 | /* The cooked register space. Each cooked register in the range |
63 | [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw | |
64 | register. The remaining [NR_RAW_REGISTERS | |
65 | .. NR_COOKED_REGISTERS) (a.k.a. pseudo regiters) are mapped onto | |
66 | both raw registers and memory by the architecture methods | |
67 | gdbarch_register_read and gdbarch_register_write. */ | |
68 | int nr_cooked_registers; | |
067df2e5 AC |
69 | long sizeof_cooked_registers; |
70 | long sizeof_cooked_register_valid_p; | |
d138e37a AC |
71 | |
72 | /* Offset and size (in 8 bit bytes), of reach register in the | |
73 | register cache. All registers (including those in the range | |
74 | [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. | |
75 | Assigning all registers an offset makes it possible to keep | |
76 | legacy code, such as that found in read_register_bytes() and | |
77 | write_register_bytes() working. */ | |
3fadccb3 | 78 | long *register_offset; |
3fadccb3 | 79 | long *sizeof_register; |
3fadccb3 | 80 | |
bb425013 AC |
81 | /* Cached table containing the type of each register. */ |
82 | struct type **register_type; | |
3fadccb3 AC |
83 | }; |
84 | ||
b9362cc7 | 85 | static void |
bb425013 AC |
86 | init_legacy_regcache_descr (struct gdbarch *gdbarch, |
87 | struct regcache_descr *descr) | |
3fadccb3 AC |
88 | { |
89 | int i; | |
3fadccb3 AC |
90 | /* FIXME: cagney/2002-05-11: gdbarch_data() should take that |
91 | ``gdbarch'' as a parameter. */ | |
92 | gdb_assert (gdbarch != NULL); | |
93 | ||
3fadccb3 | 94 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
067df2e5 AC |
95 | in the register cache. Unfortunatly some architectures still |
96 | rely on this and the pseudo_register_write() method. */ | |
d138e37a | 97 | descr->nr_raw_registers = descr->nr_cooked_registers; |
067df2e5 AC |
98 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
99 | ||
100 | /* Compute the offset of each register. Legacy architectures define | |
101 | REGISTER_BYTE() so use that. */ | |
102 | /* FIXME: cagney/2002-11-07: Instead of using REGISTER_BYTE() this | |
103 | code should, as is done in init_regcache_descr(), compute the | |
104 | offets at runtime. This currently isn't possible as some ISAs | |
105 | define overlapping register regions - see the mess in | |
106 | read_register_bytes() and write_register_bytes() registers. */ | |
d138e37a AC |
107 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
108 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
d138e37a | 109 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 110 | { |
067df2e5 AC |
111 | /* FIXME: cagney/2001-12-04: This code shouldn't need to use |
112 | REGISTER_BYTE(). Unfortunatly, legacy code likes to lay the | |
113 | buffer out so that certain registers just happen to overlap. | |
114 | Ulgh! New targets use gdbarch's register read/write and | |
115 | entirely avoid this uglyness. */ | |
3fadccb3 AC |
116 | descr->register_offset[i] = REGISTER_BYTE (i); |
117 | descr->sizeof_register[i] = REGISTER_RAW_SIZE (i); | |
123a958e AC |
118 | gdb_assert (MAX_REGISTER_SIZE >= REGISTER_RAW_SIZE (i)); |
119 | gdb_assert (MAX_REGISTER_SIZE >= REGISTER_VIRTUAL_SIZE (i)); | |
3fadccb3 AC |
120 | } |
121 | ||
067df2e5 | 122 | /* Compute the real size of the register buffer. Start out by |
b8b527c5 AC |
123 | trusting DEPRECATED_REGISTER_BYTES, but then adjust it upwards |
124 | should that be found to not be sufficient. */ | |
125 | /* FIXME: cagney/2002-11-05: Instead of using the macro | |
126 | DEPRECATED_REGISTER_BYTES, this code should, as is done in | |
127 | init_regcache_descr(), compute the total number of register bytes | |
128 | using the accumulated offsets. */ | |
129 | descr->sizeof_cooked_registers = DEPRECATED_REGISTER_BYTES; /* OK */ | |
d138e37a | 130 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 AC |
131 | { |
132 | long regend; | |
133 | /* Keep extending the buffer so that there is always enough | |
134 | space for all registers. The comparison is necessary since | |
135 | legacy code is free to put registers in random places in the | |
136 | buffer separated by holes. Once REGISTER_BYTE() is killed | |
137 | this can be greatly simplified. */ | |
3fadccb3 | 138 | regend = descr->register_offset[i] + descr->sizeof_register[i]; |
067df2e5 AC |
139 | if (descr->sizeof_cooked_registers < regend) |
140 | descr->sizeof_cooked_registers = regend; | |
3fadccb3 | 141 | } |
067df2e5 AC |
142 | /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers |
143 | in the register cache. Unfortunatly some architectures still | |
144 | rely on this and the pseudo_register_write() method. */ | |
145 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
3fadccb3 AC |
146 | } |
147 | ||
148 | static void * | |
149 | init_regcache_descr (struct gdbarch *gdbarch) | |
150 | { | |
151 | int i; | |
152 | struct regcache_descr *descr; | |
153 | gdb_assert (gdbarch != NULL); | |
154 | ||
bb425013 AC |
155 | /* Create an initial, zero filled, table. */ |
156 | descr = XCALLOC (1, struct regcache_descr); | |
3fadccb3 | 157 | descr->gdbarch = gdbarch; |
3fadccb3 | 158 | |
d138e37a AC |
159 | /* Total size of the register space. The raw registers are mapped |
160 | directly onto the raw register cache while the pseudo's are | |
3fadccb3 | 161 | either mapped onto raw-registers or memory. */ |
d138e37a | 162 | descr->nr_cooked_registers = NUM_REGS + NUM_PSEUDO_REGS; |
067df2e5 | 163 | descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS; |
3fadccb3 | 164 | |
bb425013 AC |
165 | /* Fill in a table of register types. */ |
166 | descr->register_type = XCALLOC (descr->nr_cooked_registers, | |
167 | struct type *); | |
168 | for (i = 0; i < descr->nr_cooked_registers; i++) | |
169 | { | |
35cac7cf AC |
170 | if (gdbarch_register_type_p (gdbarch)) |
171 | { | |
172 | gdb_assert (!REGISTER_VIRTUAL_TYPE_P ()); /* OK */ | |
173 | descr->register_type[i] = gdbarch_register_type (gdbarch, i); | |
174 | } | |
175 | else | |
176 | descr->register_type[i] = REGISTER_VIRTUAL_TYPE (i); /* OK */ | |
bb425013 AC |
177 | } |
178 | ||
179 | /* If an old style architecture, fill in the remainder of the | |
180 | register cache descriptor using the register macros. */ | |
dadd712e AC |
181 | /* NOTE: cagney/2003-06-29: If either of REGISTER_BYTE or |
182 | REGISTER_RAW_SIZE are still present, things are most likely | |
183 | totally screwed. Ex: an architecture with raw register sizes | |
184 | smaller than what REGISTER_BYTE indicates; non monotonic | |
185 | REGISTER_BYTE values. For GDB 6 check for these nasty methods | |
186 | and fall back to legacy code when present. Sigh! */ | |
187 | if ((!gdbarch_pseudo_register_read_p (gdbarch) | |
188 | && !gdbarch_pseudo_register_write_p (gdbarch) | |
189 | && !gdbarch_register_type_p (gdbarch)) | |
190 | || REGISTER_BYTE_P () || REGISTER_RAW_SIZE_P ()) | |
bb425013 AC |
191 | { |
192 | descr->legacy_p = 1; | |
193 | init_legacy_regcache_descr (gdbarch, descr); | |
194 | return descr; | |
195 | } | |
196 | ||
3fadccb3 AC |
197 | /* Construct a strictly RAW register cache. Don't allow pseudo's |
198 | into the register cache. */ | |
199 | descr->nr_raw_registers = NUM_REGS; | |
53826de9 AC |
200 | |
201 | /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p | |
202 | array. This pretects GDB from erant code that accesses elements | |
203 | of the global register_valid_p[] array in the range [NUM_REGS | |
204 | .. NUM_REGS + NUM_PSEUDO_REGS). */ | |
067df2e5 | 205 | descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; |
3fadccb3 | 206 | |
067df2e5 | 207 | /* Lay out the register cache. |
3fadccb3 | 208 | |
bb425013 AC |
209 | NOTE: cagney/2002-05-22: Only register_type() is used when |
210 | constructing the register cache. It is assumed that the | |
211 | register's raw size, virtual size and type length are all the | |
212 | same. */ | |
3fadccb3 AC |
213 | |
214 | { | |
215 | long offset = 0; | |
d138e37a AC |
216 | descr->sizeof_register = XCALLOC (descr->nr_cooked_registers, long); |
217 | descr->register_offset = XCALLOC (descr->nr_cooked_registers, long); | |
d138e37a | 218 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 219 | { |
bb425013 | 220 | descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
3fadccb3 AC |
221 | descr->register_offset[i] = offset; |
222 | offset += descr->sizeof_register[i]; | |
123a958e | 223 | gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
3fadccb3 AC |
224 | } |
225 | /* Set the real size of the register cache buffer. */ | |
067df2e5 | 226 | descr->sizeof_cooked_registers = offset; |
3fadccb3 AC |
227 | } |
228 | ||
067df2e5 AC |
229 | /* FIXME: cagney/2002-05-22: Should only need to allocate space for |
230 | the raw registers. Unfortunatly some code still accesses the | |
231 | register array directly using the global registers[]. Until that | |
232 | code has been purged, play safe and over allocating the register | |
233 | buffer. Ulgh! */ | |
234 | descr->sizeof_raw_registers = descr->sizeof_cooked_registers; | |
235 | ||
46654a5b AC |
236 | /* Sanity check. Confirm that there is agreement between the |
237 | regcache and the target's redundant REGISTER_BYTE (new targets | |
238 | should not even be defining it). */ | |
d138e37a | 239 | for (i = 0; i < descr->nr_cooked_registers; i++) |
3fadccb3 | 240 | { |
46654a5b AC |
241 | if (REGISTER_BYTE_P ()) |
242 | gdb_assert (descr->register_offset[i] == REGISTER_BYTE (i)); | |
243 | #if 0 | |
3fadccb3 AC |
244 | gdb_assert (descr->sizeof_register[i] == REGISTER_RAW_SIZE (i)); |
245 | gdb_assert (descr->sizeof_register[i] == REGISTER_VIRTUAL_SIZE (i)); | |
46654a5b | 246 | #endif |
3fadccb3 | 247 | } |
b8b527c5 | 248 | /* gdb_assert (descr->sizeof_raw_registers == DEPRECATED_REGISTER_BYTES (i)); */ |
3fadccb3 AC |
249 | |
250 | return descr; | |
251 | } | |
252 | ||
253 | static struct regcache_descr * | |
254 | regcache_descr (struct gdbarch *gdbarch) | |
255 | { | |
256 | return gdbarch_data (gdbarch, regcache_descr_handle); | |
257 | } | |
258 | ||
259 | static void | |
260 | xfree_regcache_descr (struct gdbarch *gdbarch, void *ptr) | |
261 | { | |
262 | struct regcache_descr *descr = ptr; | |
263 | if (descr == NULL) | |
264 | return; | |
265 | xfree (descr->register_offset); | |
266 | xfree (descr->sizeof_register); | |
267 | descr->register_offset = NULL; | |
268 | descr->sizeof_register = NULL; | |
269 | xfree (descr); | |
270 | } | |
271 | ||
bb425013 AC |
272 | /* Utility functions returning useful register attributes stored in |
273 | the regcache descr. */ | |
274 | ||
275 | struct type * | |
276 | register_type (struct gdbarch *gdbarch, int regnum) | |
277 | { | |
278 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
279 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
280 | return descr->register_type[regnum]; | |
281 | } | |
282 | ||
0ed04cce AC |
283 | /* Utility functions returning useful register attributes stored in |
284 | the regcache descr. */ | |
285 | ||
08a617da AC |
286 | int |
287 | register_size (struct gdbarch *gdbarch, int regnum) | |
288 | { | |
289 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
290 | int size; | |
291 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); | |
292 | size = descr->sizeof_register[regnum]; | |
96a4ee76 AC |
293 | /* NB: The deprecated REGISTER_RAW_SIZE, if not provided, defaults |
294 | to the size of the register's type. */ | |
08a617da | 295 | gdb_assert (size == REGISTER_RAW_SIZE (regnum)); /* OK */ |
96a4ee76 AC |
296 | /* NB: Don't check the register's virtual size. It, in say the case |
297 | of the MIPS, may not match the raw size! */ | |
08a617da AC |
298 | return size; |
299 | } | |
300 | ||
3fadccb3 AC |
301 | /* The register cache for storing raw register values. */ |
302 | ||
303 | struct regcache | |
304 | { | |
305 | struct regcache_descr *descr; | |
51b1fe4e AC |
306 | /* The register buffers. A read-only register cache can hold the |
307 | full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write | |
308 | register cache can only hold [0 .. NUM_REGS). */ | |
309 | char *registers; | |
310 | char *register_valid_p; | |
2d28509a AC |
311 | /* Is this a read-only cache? A read-only cache is used for saving |
312 | the target's register state (e.g, across an inferior function | |
313 | call or just before forcing a function return). A read-only | |
314 | cache can only be updated via the methods regcache_dup() and | |
315 | regcache_cpy(). The actual contents are determined by the | |
316 | reggroup_save and reggroup_restore methods. */ | |
317 | int readonly_p; | |
3fadccb3 AC |
318 | }; |
319 | ||
320 | struct regcache * | |
321 | regcache_xmalloc (struct gdbarch *gdbarch) | |
322 | { | |
323 | struct regcache_descr *descr; | |
324 | struct regcache *regcache; | |
325 | gdb_assert (gdbarch != NULL); | |
326 | descr = regcache_descr (gdbarch); | |
327 | regcache = XMALLOC (struct regcache); | |
328 | regcache->descr = descr; | |
51b1fe4e | 329 | regcache->registers |
3fadccb3 | 330 | = XCALLOC (descr->sizeof_raw_registers, char); |
51b1fe4e | 331 | regcache->register_valid_p |
3fadccb3 | 332 | = XCALLOC (descr->sizeof_raw_register_valid_p, char); |
2d28509a | 333 | regcache->readonly_p = 1; |
3fadccb3 AC |
334 | return regcache; |
335 | } | |
336 | ||
337 | void | |
338 | regcache_xfree (struct regcache *regcache) | |
339 | { | |
340 | if (regcache == NULL) | |
341 | return; | |
51b1fe4e AC |
342 | xfree (regcache->registers); |
343 | xfree (regcache->register_valid_p); | |
3fadccb3 AC |
344 | xfree (regcache); |
345 | } | |
346 | ||
b9362cc7 | 347 | static void |
36160dc4 AC |
348 | do_regcache_xfree (void *data) |
349 | { | |
350 | regcache_xfree (data); | |
351 | } | |
352 | ||
353 | struct cleanup * | |
354 | make_cleanup_regcache_xfree (struct regcache *regcache) | |
355 | { | |
356 | return make_cleanup (do_regcache_xfree, regcache); | |
357 | } | |
358 | ||
51b1fe4e AC |
359 | /* Return a pointer to register REGNUM's buffer cache. */ |
360 | ||
361 | static char * | |
362 | register_buffer (struct regcache *regcache, int regnum) | |
363 | { | |
364 | return regcache->registers + regcache->descr->register_offset[regnum]; | |
365 | } | |
366 | ||
2d28509a | 367 | void |
5602984a AC |
368 | regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, |
369 | void *src) | |
2d28509a AC |
370 | { |
371 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 372 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 373 | int regnum; |
2d28509a | 374 | /* The DST should be `read-only', if it wasn't then the save would |
5602984a | 375 | end up trying to write the register values back out to the |
2d28509a | 376 | target. */ |
2d28509a AC |
377 | gdb_assert (dst->readonly_p); |
378 | /* Clear the dest. */ | |
379 | memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); | |
380 | memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); | |
381 | /* Copy over any registers (identified by their membership in the | |
5602984a AC |
382 | save_reggroup) and mark them as valid. The full [0 .. NUM_REGS + |
383 | NUM_PSEUDO_REGS) range is checked since some architectures need | |
384 | to save/restore `cooked' registers that live in memory. */ | |
2d28509a AC |
385 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) |
386 | { | |
387 | if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) | |
388 | { | |
5602984a AC |
389 | int valid = cooked_read (src, regnum, buf); |
390 | if (valid) | |
391 | { | |
392 | memcpy (register_buffer (dst, regnum), buf, | |
393 | register_size (gdbarch, regnum)); | |
394 | dst->register_valid_p[regnum] = 1; | |
395 | } | |
2d28509a AC |
396 | } |
397 | } | |
398 | } | |
399 | ||
400 | void | |
5602984a AC |
401 | regcache_restore (struct regcache *dst, |
402 | regcache_cooked_read_ftype *cooked_read, | |
403 | void *src) | |
2d28509a AC |
404 | { |
405 | struct gdbarch *gdbarch = dst->descr->gdbarch; | |
123a958e | 406 | char buf[MAX_REGISTER_SIZE]; |
2d28509a | 407 | int regnum; |
5602984a AC |
408 | /* The dst had better not be read-only. If it is, the `restore' |
409 | doesn't make much sense. */ | |
2d28509a | 410 | gdb_assert (!dst->readonly_p); |
2d28509a | 411 | /* Copy over any registers, being careful to only restore those that |
5602984a AC |
412 | were both saved and need to be restored. The full [0 .. NUM_REGS |
413 | + NUM_PSEUDO_REGS) range is checked since some architectures need | |
414 | to save/restore `cooked' registers that live in memory. */ | |
415 | for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) | |
2d28509a | 416 | { |
5602984a | 417 | if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
2d28509a | 418 | { |
5602984a AC |
419 | int valid = cooked_read (src, regnum, buf); |
420 | if (valid) | |
421 | regcache_cooked_write (dst, regnum, buf); | |
2d28509a AC |
422 | } |
423 | } | |
424 | } | |
425 | ||
5602984a AC |
426 | static int |
427 | do_cooked_read (void *src, int regnum, void *buf) | |
428 | { | |
429 | struct regcache *regcache = src; | |
6f4e5a41 | 430 | if (!regcache->register_valid_p[regnum] && regcache->readonly_p) |
5602984a AC |
431 | /* Don't even think about fetching a register from a read-only |
432 | cache when the register isn't yet valid. There isn't a target | |
433 | from which the register value can be fetched. */ | |
434 | return 0; | |
435 | regcache_cooked_read (regcache, regnum, buf); | |
436 | return 1; | |
437 | } | |
438 | ||
439 | ||
3fadccb3 AC |
440 | void |
441 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
442 | { | |
443 | int i; | |
444 | char *buf; | |
445 | gdb_assert (src != NULL && dst != NULL); | |
446 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
447 | gdb_assert (src != dst); | |
2d28509a AC |
448 | gdb_assert (src->readonly_p || dst->readonly_p); |
449 | if (!src->readonly_p) | |
5602984a | 450 | regcache_save (dst, do_cooked_read, src); |
2d28509a | 451 | else if (!dst->readonly_p) |
5602984a | 452 | regcache_restore (dst, do_cooked_read, src); |
2d28509a AC |
453 | else |
454 | regcache_cpy_no_passthrough (dst, src); | |
3fadccb3 AC |
455 | } |
456 | ||
457 | void | |
458 | regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) | |
459 | { | |
460 | int i; | |
461 | gdb_assert (src != NULL && dst != NULL); | |
462 | gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); | |
463 | /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough | |
464 | move of data into the current_regcache(). Doing this would be | |
465 | silly - it would mean that valid_p would be completly invalid. */ | |
466 | gdb_assert (dst != current_regcache); | |
51b1fe4e AC |
467 | memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); |
468 | memcpy (dst->register_valid_p, src->register_valid_p, | |
3fadccb3 AC |
469 | dst->descr->sizeof_raw_register_valid_p); |
470 | } | |
471 | ||
472 | struct regcache * | |
473 | regcache_dup (struct regcache *src) | |
474 | { | |
475 | struct regcache *newbuf; | |
476 | gdb_assert (current_regcache != NULL); | |
477 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
478 | regcache_cpy (newbuf, src); | |
479 | return newbuf; | |
480 | } | |
481 | ||
482 | struct regcache * | |
483 | regcache_dup_no_passthrough (struct regcache *src) | |
484 | { | |
485 | struct regcache *newbuf; | |
486 | gdb_assert (current_regcache != NULL); | |
487 | newbuf = regcache_xmalloc (src->descr->gdbarch); | |
488 | regcache_cpy_no_passthrough (newbuf, src); | |
489 | return newbuf; | |
490 | } | |
491 | ||
492 | int | |
493 | regcache_valid_p (struct regcache *regcache, int regnum) | |
494 | { | |
495 | gdb_assert (regcache != NULL); | |
496 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
51b1fe4e | 497 | return regcache->register_valid_p[regnum]; |
3fadccb3 AC |
498 | } |
499 | ||
3fadccb3 AC |
500 | char * |
501 | deprecated_grub_regcache_for_registers (struct regcache *regcache) | |
502 | { | |
51b1fe4e | 503 | return regcache->registers; |
3fadccb3 AC |
504 | } |
505 | ||
3fadccb3 AC |
506 | /* Global structure containing the current regcache. */ |
507 | /* FIXME: cagney/2002-05-11: The two global arrays registers[] and | |
8262ee23 | 508 | deprecated_register_valid[] currently point into this structure. */ |
3fadccb3 AC |
509 | struct regcache *current_regcache; |
510 | ||
5ebd2499 | 511 | /* NOTE: this is a write-through cache. There is no "dirty" bit for |
32178cab MS |
512 | recording if the register values have been changed (eg. by the |
513 | user). Therefore all registers must be written back to the | |
514 | target when appropriate. */ | |
515 | ||
516 | /* REGISTERS contains the cached register values (in target byte order). */ | |
517 | ||
524d7c18 | 518 | char *deprecated_registers; |
32178cab | 519 | |
8262ee23 | 520 | /* DEPRECATED_REGISTER_VALID is 0 if the register needs to be fetched, |
32178cab MS |
521 | 1 if it has been fetched, and |
522 | -1 if the register value was not available. | |
c97dcfc7 AC |
523 | |
524 | "Not available" indicates that the target is not not able to supply | |
525 | the register at this state. The register may become available at a | |
526 | later time (after the next resume). This often occures when GDB is | |
527 | manipulating a target that contains only a snapshot of the entire | |
528 | system being debugged - some of the registers in such a system may | |
529 | not have been saved. */ | |
32178cab | 530 | |
8262ee23 | 531 | signed char *deprecated_register_valid; |
32178cab | 532 | |
39f77062 | 533 | /* The thread/process associated with the current set of registers. */ |
32178cab | 534 | |
39f77062 | 535 | static ptid_t registers_ptid; |
32178cab MS |
536 | |
537 | /* | |
538 | * FUNCTIONS: | |
539 | */ | |
540 | ||
541 | /* REGISTER_CACHED() | |
542 | ||
543 | Returns 0 if the value is not in the cache (needs fetch). | |
544 | >0 if the value is in the cache. | |
545 | <0 if the value is permanently unavailable (don't ask again). */ | |
546 | ||
547 | int | |
548 | register_cached (int regnum) | |
549 | { | |
8262ee23 | 550 | return deprecated_register_valid[regnum]; |
32178cab MS |
551 | } |
552 | ||
7302a204 ND |
553 | /* Record that REGNUM's value is cached if STATE is >0, uncached but |
554 | fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */ | |
555 | ||
556 | void | |
557 | set_register_cached (int regnum, int state) | |
558 | { | |
53826de9 AC |
559 | gdb_assert (regnum >= 0); |
560 | gdb_assert (regnum < current_regcache->descr->nr_raw_registers); | |
51b1fe4e | 561 | current_regcache->register_valid_p[regnum] = state; |
7302a204 ND |
562 | } |
563 | ||
564 | /* Return whether register REGNUM is a real register. */ | |
565 | ||
566 | static int | |
567 | real_register (int regnum) | |
568 | { | |
569 | return regnum >= 0 && regnum < NUM_REGS; | |
570 | } | |
571 | ||
32178cab MS |
572 | /* Low level examining and depositing of registers. |
573 | ||
574 | The caller is responsible for making sure that the inferior is | |
575 | stopped before calling the fetching routines, or it will get | |
576 | garbage. (a change from GDB version 3, in which the caller got the | |
577 | value from the last stop). */ | |
578 | ||
579 | /* REGISTERS_CHANGED () | |
580 | ||
581 | Indicate that registers may have changed, so invalidate the cache. */ | |
582 | ||
583 | void | |
584 | registers_changed (void) | |
585 | { | |
586 | int i; | |
32178cab | 587 | |
39f77062 | 588 | registers_ptid = pid_to_ptid (-1); |
32178cab MS |
589 | |
590 | /* Force cleanup of any alloca areas if using C alloca instead of | |
591 | a builtin alloca. This particular call is used to clean up | |
592 | areas allocated by low level target code which may build up | |
593 | during lengthy interactions between gdb and the target before | |
594 | gdb gives control to the user (ie watchpoints). */ | |
595 | alloca (0); | |
596 | ||
53826de9 | 597 | for (i = 0; i < current_regcache->descr->nr_raw_registers; i++) |
7302a204 | 598 | set_register_cached (i, 0); |
32178cab MS |
599 | |
600 | if (registers_changed_hook) | |
601 | registers_changed_hook (); | |
602 | } | |
603 | ||
2b9e5f3f | 604 | /* DEPRECATED_REGISTERS_FETCHED () |
32178cab MS |
605 | |
606 | Indicate that all registers have been fetched, so mark them all valid. */ | |
607 | ||
31e9866e AC |
608 | /* NOTE: cagney/2001-12-04: This function does not set valid on the |
609 | pseudo-register range since pseudo registers are always supplied | |
610 | using supply_register(). */ | |
611 | /* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target | |
612 | code was blatting the registers[] array and then calling this. | |
613 | Since targets should only be using supply_register() the need for | |
614 | this function/hack is eliminated. */ | |
32178cab MS |
615 | |
616 | void | |
2b9e5f3f | 617 | deprecated_registers_fetched (void) |
32178cab MS |
618 | { |
619 | int i; | |
32178cab | 620 | |
a728f042 | 621 | for (i = 0; i < NUM_REGS; i++) |
7302a204 | 622 | set_register_cached (i, 1); |
fcdc5976 | 623 | /* Do not assume that the pseudo-regs have also been fetched. |
31e9866e | 624 | Fetching all real regs NEVER accounts for pseudo-regs. */ |
32178cab MS |
625 | } |
626 | ||
73937e03 AC |
627 | /* deprecated_read_register_bytes and deprecated_write_register_bytes |
628 | are generally a *BAD* idea. They are inefficient because they need | |
629 | to check for partial updates, which can only be done by scanning | |
630 | through all of the registers and seeing if the bytes that are being | |
631 | read/written fall inside of an invalid register. [The main reason | |
632 | this is necessary is that register sizes can vary, so a simple | |
633 | index won't suffice.] It is far better to call read_register_gen | |
634 | and write_register_gen if you want to get at the raw register | |
635 | contents, as it only takes a regnum as an argument, and therefore | |
636 | can't do a partial register update. | |
32178cab MS |
637 | |
638 | Prior to the recent fixes to check for partial updates, both read | |
73937e03 AC |
639 | and deprecated_write_register_bytes always checked to see if any |
640 | registers were stale, and then called target_fetch_registers (-1) | |
641 | to update the whole set. This caused really slowed things down for | |
642 | remote targets. */ | |
32178cab MS |
643 | |
644 | /* Copy INLEN bytes of consecutive data from registers | |
645 | starting with the INREGBYTE'th byte of register data | |
646 | into memory at MYADDR. */ | |
647 | ||
648 | void | |
73937e03 | 649 | deprecated_read_register_bytes (int in_start, char *in_buf, int in_len) |
32178cab | 650 | { |
61a0eb5b | 651 | int in_end = in_start + in_len; |
5ebd2499 | 652 | int regnum; |
d9d9c31f | 653 | char reg_buf[MAX_REGISTER_SIZE]; |
32178cab MS |
654 | |
655 | /* See if we are trying to read bytes from out-of-date registers. If so, | |
656 | update just those registers. */ | |
657 | ||
5ebd2499 | 658 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab | 659 | { |
61a0eb5b AC |
660 | int reg_start; |
661 | int reg_end; | |
662 | int reg_len; | |
663 | int start; | |
664 | int end; | |
665 | int byte; | |
32178cab | 666 | |
61a0eb5b AC |
667 | reg_start = REGISTER_BYTE (regnum); |
668 | reg_len = REGISTER_RAW_SIZE (regnum); | |
669 | reg_end = reg_start + reg_len; | |
32178cab | 670 | |
61a0eb5b | 671 | if (reg_end <= in_start || in_end <= reg_start) |
5ebd2499 | 672 | /* The range the user wants to read doesn't overlap with regnum. */ |
32178cab MS |
673 | continue; |
674 | ||
275f450c AC |
675 | if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0') |
676 | /* Force the cache to fetch the entire register. */ | |
4caf0990 | 677 | deprecated_read_register_gen (regnum, reg_buf); |
275f450c AC |
678 | else |
679 | /* Legacy note: even though this register is ``invalid'' we | |
680 | still need to return something. It would appear that some | |
681 | code relies on apparent gaps in the register array also | |
682 | being returned. */ | |
683 | /* FIXME: cagney/2001-08-18: This is just silly. It defeats | |
684 | the entire register read/write flow of control. Must | |
685 | resist temptation to return 0xdeadbeef. */ | |
524d7c18 | 686 | memcpy (reg_buf, &deprecated_registers[reg_start], reg_len); |
32178cab | 687 | |
61a0eb5b AC |
688 | /* Legacy note: This function, for some reason, allows a NULL |
689 | input buffer. If the buffer is NULL, the registers are still | |
690 | fetched, just the final transfer is skipped. */ | |
691 | if (in_buf == NULL) | |
692 | continue; | |
693 | ||
694 | /* start = max (reg_start, in_start) */ | |
695 | if (reg_start > in_start) | |
696 | start = reg_start; | |
697 | else | |
698 | start = in_start; | |
699 | ||
700 | /* end = min (reg_end, in_end) */ | |
701 | if (reg_end < in_end) | |
702 | end = reg_end; | |
703 | else | |
704 | end = in_end; | |
705 | ||
706 | /* Transfer just the bytes common to both IN_BUF and REG_BUF */ | |
707 | for (byte = start; byte < end; byte++) | |
165cd47f | 708 | { |
61a0eb5b | 709 | in_buf[byte - in_start] = reg_buf[byte - reg_start]; |
165cd47f | 710 | } |
32178cab | 711 | } |
32178cab MS |
712 | } |
713 | ||
5ebd2499 ND |
714 | /* Read register REGNUM into memory at MYADDR, which must be large |
715 | enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the | |
32178cab MS |
716 | register is known to be the size of a CORE_ADDR or smaller, |
717 | read_register can be used instead. */ | |
718 | ||
61a0eb5b AC |
719 | static void |
720 | legacy_read_register_gen (int regnum, char *myaddr) | |
32178cab | 721 | { |
61a0eb5b | 722 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
39f77062 | 723 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
724 | { |
725 | registers_changed (); | |
39f77062 | 726 | registers_ptid = inferior_ptid; |
32178cab MS |
727 | } |
728 | ||
7302a204 | 729 | if (!register_cached (regnum)) |
5c27f28a | 730 | target_fetch_registers (regnum); |
7302a204 | 731 | |
3fadccb3 | 732 | memcpy (myaddr, register_buffer (current_regcache, regnum), |
5ebd2499 | 733 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
734 | } |
735 | ||
61a0eb5b | 736 | void |
1aaa5f99 | 737 | regcache_raw_read (struct regcache *regcache, int regnum, void *buf) |
61a0eb5b | 738 | { |
3fadccb3 AC |
739 | gdb_assert (regcache != NULL && buf != NULL); |
740 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
741 | if (regcache->descr->legacy_p | |
2d28509a | 742 | && !regcache->readonly_p) |
3fadccb3 AC |
743 | { |
744 | gdb_assert (regcache == current_regcache); | |
745 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
746 | silently and very indirectly updates the regcache's regcache | |
8262ee23 | 747 | via the global deprecated_register_valid[]. */ |
3fadccb3 AC |
748 | legacy_read_register_gen (regnum, buf); |
749 | return; | |
750 | } | |
751 | /* Make certain that the register cache is up-to-date with respect | |
752 | to the current thread. This switching shouldn't be necessary | |
753 | only there is still only one target side register cache. Sigh! | |
754 | On the bright side, at least there is a regcache object. */ | |
2d28509a | 755 | if (!regcache->readonly_p) |
3fadccb3 AC |
756 | { |
757 | gdb_assert (regcache == current_regcache); | |
758 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
759 | { | |
760 | registers_changed (); | |
761 | registers_ptid = inferior_ptid; | |
762 | } | |
763 | if (!register_cached (regnum)) | |
5c27f28a | 764 | target_fetch_registers (regnum); |
3fadccb3 AC |
765 | } |
766 | /* Copy the value directly into the register cache. */ | |
51b1fe4e | 767 | memcpy (buf, register_buffer (regcache, regnum), |
3fadccb3 | 768 | regcache->descr->sizeof_register[regnum]); |
61a0eb5b AC |
769 | } |
770 | ||
28fc6740 AC |
771 | void |
772 | regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) | |
773 | { | |
774 | char *buf; | |
775 | gdb_assert (regcache != NULL); | |
776 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
777 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
778 | regcache_raw_read (regcache, regnum, buf); | |
779 | (*val) = extract_signed_integer (buf, | |
780 | regcache->descr->sizeof_register[regnum]); | |
781 | } | |
782 | ||
783 | void | |
784 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
785 | ULONGEST *val) | |
786 | { | |
787 | char *buf; | |
788 | gdb_assert (regcache != NULL); | |
789 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
790 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
791 | regcache_raw_read (regcache, regnum, buf); | |
792 | (*val) = extract_unsigned_integer (buf, | |
793 | regcache->descr->sizeof_register[regnum]); | |
794 | } | |
795 | ||
c00dcbe9 MK |
796 | void |
797 | regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) | |
798 | { | |
799 | void *buf; | |
800 | gdb_assert (regcache != NULL); | |
801 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
802 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
803 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
804 | regcache_raw_write (regcache, regnum, buf); | |
805 | } | |
806 | ||
807 | void | |
808 | regcache_raw_write_unsigned (struct regcache *regcache, int regnum, | |
809 | ULONGEST val) | |
810 | { | |
811 | void *buf; | |
812 | gdb_assert (regcache != NULL); | |
813 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); | |
814 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
815 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
816 | regcache_raw_write (regcache, regnum, buf); | |
817 | } | |
818 | ||
61a0eb5b | 819 | void |
4caf0990 | 820 | deprecated_read_register_gen (int regnum, char *buf) |
61a0eb5b | 821 | { |
3fadccb3 AC |
822 | gdb_assert (current_regcache != NULL); |
823 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
824 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
825 | { |
826 | legacy_read_register_gen (regnum, buf); | |
827 | return; | |
828 | } | |
68365089 AC |
829 | regcache_cooked_read (current_regcache, regnum, buf); |
830 | } | |
831 | ||
832 | void | |
29e1842b | 833 | regcache_cooked_read (struct regcache *regcache, int regnum, void *buf) |
68365089 | 834 | { |
d138e37a | 835 | gdb_assert (regnum >= 0); |
68365089 AC |
836 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
837 | if (regnum < regcache->descr->nr_raw_registers) | |
838 | regcache_raw_read (regcache, regnum, buf); | |
2d28509a AC |
839 | else if (regcache->readonly_p |
840 | && regnum < regcache->descr->nr_cooked_registers | |
841 | && regcache->register_valid_p[regnum]) | |
842 | /* Read-only register cache, perhaphs the cooked value was cached? */ | |
843 | memcpy (buf, register_buffer (regcache, regnum), | |
844 | regcache->descr->sizeof_register[regnum]); | |
d138e37a | 845 | else |
68365089 AC |
846 | gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, |
847 | regnum, buf); | |
61a0eb5b AC |
848 | } |
849 | ||
a378f419 AC |
850 | void |
851 | regcache_cooked_read_signed (struct regcache *regcache, int regnum, | |
852 | LONGEST *val) | |
853 | { | |
854 | char *buf; | |
855 | gdb_assert (regcache != NULL); | |
a66a9c23 | 856 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
857 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
858 | regcache_cooked_read (regcache, regnum, buf); | |
859 | (*val) = extract_signed_integer (buf, | |
860 | regcache->descr->sizeof_register[regnum]); | |
861 | } | |
862 | ||
863 | void | |
864 | regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, | |
865 | ULONGEST *val) | |
866 | { | |
867 | char *buf; | |
868 | gdb_assert (regcache != NULL); | |
a66a9c23 | 869 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers); |
a378f419 AC |
870 | buf = alloca (regcache->descr->sizeof_register[regnum]); |
871 | regcache_cooked_read (regcache, regnum, buf); | |
872 | (*val) = extract_unsigned_integer (buf, | |
873 | regcache->descr->sizeof_register[regnum]); | |
874 | } | |
875 | ||
a66a9c23 AC |
876 | void |
877 | regcache_cooked_write_signed (struct regcache *regcache, int regnum, | |
878 | LONGEST val) | |
879 | { | |
880 | void *buf; | |
881 | gdb_assert (regcache != NULL); | |
882 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
883 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
884 | store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
885 | regcache_cooked_write (regcache, regnum, buf); | |
886 | } | |
887 | ||
888 | void | |
889 | regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, | |
890 | ULONGEST val) | |
891 | { | |
892 | void *buf; | |
893 | gdb_assert (regcache != NULL); | |
894 | gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); | |
895 | buf = alloca (regcache->descr->sizeof_register[regnum]); | |
896 | store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val); | |
897 | regcache_cooked_write (regcache, regnum, buf); | |
898 | } | |
899 | ||
5ebd2499 ND |
900 | /* Write register REGNUM at MYADDR to the target. MYADDR points at |
901 | REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */ | |
32178cab | 902 | |
61a0eb5b | 903 | static void |
1aaa5f99 | 904 | legacy_write_register_gen (int regnum, const void *myaddr) |
32178cab MS |
905 | { |
906 | int size; | |
61a0eb5b | 907 | gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS)); |
32178cab MS |
908 | |
909 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
910 | change the registers array if something writes to this register. */ | |
5ebd2499 | 911 | if (CANNOT_STORE_REGISTER (regnum)) |
32178cab MS |
912 | return; |
913 | ||
39f77062 | 914 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
915 | { |
916 | registers_changed (); | |
39f77062 | 917 | registers_ptid = inferior_ptid; |
32178cab MS |
918 | } |
919 | ||
5ebd2499 | 920 | size = REGISTER_RAW_SIZE (regnum); |
32178cab | 921 | |
7302a204 | 922 | if (real_register (regnum)) |
1297a2f0 MS |
923 | { |
924 | /* If we have a valid copy of the register, and new value == old | |
925 | value, then don't bother doing the actual store. */ | |
926 | if (register_cached (regnum) | |
3fadccb3 AC |
927 | && (memcmp (register_buffer (current_regcache, regnum), myaddr, size) |
928 | == 0)) | |
1297a2f0 MS |
929 | return; |
930 | else | |
931 | target_prepare_to_store (); | |
932 | } | |
32178cab | 933 | |
3fadccb3 | 934 | memcpy (register_buffer (current_regcache, regnum), myaddr, size); |
32178cab | 935 | |
7302a204 | 936 | set_register_cached (regnum, 1); |
5c27f28a | 937 | target_store_registers (regnum); |
32178cab MS |
938 | } |
939 | ||
61a0eb5b | 940 | void |
1aaa5f99 | 941 | regcache_raw_write (struct regcache *regcache, int regnum, const void *buf) |
61a0eb5b | 942 | { |
3fadccb3 AC |
943 | gdb_assert (regcache != NULL && buf != NULL); |
944 | gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); | |
2d28509a | 945 | gdb_assert (!regcache->readonly_p); |
3fadccb3 | 946 | |
2d28509a | 947 | if (regcache->descr->legacy_p) |
3fadccb3 AC |
948 | { |
949 | /* For moment, just use underlying legacy code. Ulgh!!! This | |
950 | silently and very indirectly updates the regcache's buffers | |
8262ee23 | 951 | via the globals deprecated_register_valid[] and registers[]. */ |
3fadccb3 AC |
952 | gdb_assert (regcache == current_regcache); |
953 | legacy_write_register_gen (regnum, buf); | |
954 | return; | |
955 | } | |
956 | ||
957 | /* On the sparc, writing %g0 is a no-op, so we don't even want to | |
958 | change the registers array if something writes to this register. */ | |
959 | if (CANNOT_STORE_REGISTER (regnum)) | |
960 | return; | |
961 | ||
3fadccb3 AC |
962 | /* Make certain that the correct cache is selected. */ |
963 | gdb_assert (regcache == current_regcache); | |
964 | if (! ptid_equal (registers_ptid, inferior_ptid)) | |
965 | { | |
966 | registers_changed (); | |
967 | registers_ptid = inferior_ptid; | |
968 | } | |
969 | ||
970 | /* If we have a valid copy of the register, and new value == old | |
971 | value, then don't bother doing the actual store. */ | |
972 | if (regcache_valid_p (regcache, regnum) | |
973 | && (memcmp (register_buffer (regcache, regnum), buf, | |
974 | regcache->descr->sizeof_register[regnum]) == 0)) | |
975 | return; | |
976 | ||
977 | target_prepare_to_store (); | |
978 | memcpy (register_buffer (regcache, regnum), buf, | |
979 | regcache->descr->sizeof_register[regnum]); | |
51b1fe4e | 980 | regcache->register_valid_p[regnum] = 1; |
5c27f28a | 981 | target_store_registers (regnum); |
61a0eb5b AC |
982 | } |
983 | ||
984 | void | |
4caf0990 | 985 | deprecated_write_register_gen (int regnum, char *buf) |
61a0eb5b | 986 | { |
3fadccb3 AC |
987 | gdb_assert (current_regcache != NULL); |
988 | gdb_assert (current_regcache->descr->gdbarch == current_gdbarch); | |
989 | if (current_regcache->descr->legacy_p) | |
61a0eb5b AC |
990 | { |
991 | legacy_write_register_gen (regnum, buf); | |
992 | return; | |
993 | } | |
68365089 AC |
994 | regcache_cooked_write (current_regcache, regnum, buf); |
995 | } | |
996 | ||
997 | void | |
29e1842b | 998 | regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf) |
68365089 | 999 | { |
d138e37a | 1000 | gdb_assert (regnum >= 0); |
68365089 AC |
1001 | gdb_assert (regnum < regcache->descr->nr_cooked_registers); |
1002 | if (regnum < regcache->descr->nr_raw_registers) | |
1003 | regcache_raw_write (regcache, regnum, buf); | |
d138e37a | 1004 | else |
68365089 | 1005 | gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache, |
d8124050 | 1006 | regnum, buf); |
61a0eb5b AC |
1007 | } |
1008 | ||
32178cab MS |
1009 | /* Copy INLEN bytes of consecutive data from memory at MYADDR |
1010 | into registers starting with the MYREGSTART'th byte of register data. */ | |
1011 | ||
1012 | void | |
73937e03 | 1013 | deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen) |
32178cab MS |
1014 | { |
1015 | int myregend = myregstart + inlen; | |
5ebd2499 | 1016 | int regnum; |
32178cab MS |
1017 | |
1018 | target_prepare_to_store (); | |
1019 | ||
1020 | /* Scan through the registers updating any that are covered by the | |
1021 | range myregstart<=>myregend using write_register_gen, which does | |
1022 | nice things like handling threads, and avoiding updates when the | |
1023 | new and old contents are the same. */ | |
1024 | ||
5ebd2499 | 1025 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
32178cab MS |
1026 | { |
1027 | int regstart, regend; | |
1028 | ||
5ebd2499 ND |
1029 | regstart = REGISTER_BYTE (regnum); |
1030 | regend = regstart + REGISTER_RAW_SIZE (regnum); | |
32178cab MS |
1031 | |
1032 | /* Is this register completely outside the range the user is writing? */ | |
1033 | if (myregend <= regstart || regend <= myregstart) | |
1034 | /* do nothing */ ; | |
1035 | ||
1036 | /* Is this register completely within the range the user is writing? */ | |
1037 | else if (myregstart <= regstart && regend <= myregend) | |
4caf0990 | 1038 | deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart)); |
32178cab MS |
1039 | |
1040 | /* The register partially overlaps the range being written. */ | |
1041 | else | |
1042 | { | |
d9d9c31f | 1043 | char regbuf[MAX_REGISTER_SIZE]; |
32178cab MS |
1044 | /* What's the overlap between this register's bytes and |
1045 | those the caller wants to write? */ | |
1046 | int overlapstart = max (regstart, myregstart); | |
1047 | int overlapend = min (regend, myregend); | |
1048 | ||
1049 | /* We may be doing a partial update of an invalid register. | |
1050 | Update it from the target before scribbling on it. */ | |
4caf0990 | 1051 | deprecated_read_register_gen (regnum, regbuf); |
32178cab | 1052 | |
524d7c18 | 1053 | memcpy (&deprecated_registers[overlapstart], |
32178cab MS |
1054 | myaddr + (overlapstart - myregstart), |
1055 | overlapend - overlapstart); | |
1056 | ||
5c27f28a | 1057 | target_store_registers (regnum); |
32178cab MS |
1058 | } |
1059 | } | |
1060 | } | |
1061 | ||
06c0b04e AC |
1062 | /* Perform a partial register transfer using a read, modify, write |
1063 | operation. */ | |
1064 | ||
1065 | typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, | |
1066 | void *buf); | |
1067 | typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, | |
1068 | const void *buf); | |
1069 | ||
b9362cc7 | 1070 | static void |
06c0b04e AC |
1071 | regcache_xfer_part (struct regcache *regcache, int regnum, |
1072 | int offset, int len, void *in, const void *out, | |
1073 | regcache_read_ftype *read, regcache_write_ftype *write) | |
1074 | { | |
1075 | struct regcache_descr *descr = regcache->descr; | |
123a958e | 1076 | bfd_byte reg[MAX_REGISTER_SIZE]; |
06c0b04e AC |
1077 | gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); |
1078 | gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); | |
1079 | /* Something to do? */ | |
1080 | if (offset + len == 0) | |
1081 | return; | |
1082 | /* Read (when needed) ... */ | |
1083 | if (in != NULL | |
1084 | || offset > 0 | |
1085 | || offset + len < descr->sizeof_register[regnum]) | |
1086 | { | |
1087 | gdb_assert (read != NULL); | |
1088 | read (regcache, regnum, reg); | |
1089 | } | |
1090 | /* ... modify ... */ | |
1091 | if (in != NULL) | |
1092 | memcpy (in, reg + offset, len); | |
1093 | if (out != NULL) | |
1094 | memcpy (reg + offset, out, len); | |
1095 | /* ... write (when needed). */ | |
1096 | if (out != NULL) | |
1097 | { | |
1098 | gdb_assert (write != NULL); | |
1099 | write (regcache, regnum, reg); | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | void | |
1104 | regcache_raw_read_part (struct regcache *regcache, int regnum, | |
1105 | int offset, int len, void *buf) | |
1106 | { | |
1107 | struct regcache_descr *descr = regcache->descr; | |
1108 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1109 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1110 | regcache_raw_read, regcache_raw_write); | |
1111 | } | |
1112 | ||
1113 | void | |
1114 | regcache_raw_write_part (struct regcache *regcache, int regnum, | |
1115 | int offset, int len, const void *buf) | |
1116 | { | |
1117 | struct regcache_descr *descr = regcache->descr; | |
1118 | gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); | |
1119 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1120 | regcache_raw_read, regcache_raw_write); | |
1121 | } | |
1122 | ||
1123 | void | |
1124 | regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
1125 | int offset, int len, void *buf) | |
1126 | { | |
1127 | struct regcache_descr *descr = regcache->descr; | |
1128 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1129 | regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, | |
1130 | regcache_cooked_read, regcache_cooked_write); | |
1131 | } | |
1132 | ||
1133 | void | |
1134 | regcache_cooked_write_part (struct regcache *regcache, int regnum, | |
1135 | int offset, int len, const void *buf) | |
1136 | { | |
1137 | struct regcache_descr *descr = regcache->descr; | |
1138 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1139 | regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, | |
1140 | regcache_cooked_read, regcache_cooked_write); | |
1141 | } | |
32178cab | 1142 | |
d3b22ed5 AC |
1143 | /* Hack to keep code that view the register buffer as raw bytes |
1144 | working. */ | |
1145 | ||
1146 | int | |
1147 | register_offset_hack (struct gdbarch *gdbarch, int regnum) | |
1148 | { | |
1149 | struct regcache_descr *descr = regcache_descr (gdbarch); | |
1150 | gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); | |
1151 | return descr->register_offset[regnum]; | |
1152 | } | |
1153 | ||
5ebd2499 | 1154 | /* Return the contents of register REGNUM as an unsigned integer. */ |
32178cab | 1155 | |
173155e8 | 1156 | ULONGEST |
5ebd2499 | 1157 | read_register (int regnum) |
32178cab | 1158 | { |
61a0eb5b | 1159 | char *buf = alloca (REGISTER_RAW_SIZE (regnum)); |
4caf0990 | 1160 | deprecated_read_register_gen (regnum, buf); |
61a0eb5b | 1161 | return (extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum))); |
32178cab MS |
1162 | } |
1163 | ||
173155e8 | 1164 | ULONGEST |
39f77062 | 1165 | read_register_pid (int regnum, ptid_t ptid) |
32178cab | 1166 | { |
39f77062 | 1167 | ptid_t save_ptid; |
32178cab MS |
1168 | int save_pid; |
1169 | CORE_ADDR retval; | |
1170 | ||
39f77062 | 1171 | if (ptid_equal (ptid, inferior_ptid)) |
5ebd2499 | 1172 | return read_register (regnum); |
32178cab | 1173 | |
39f77062 | 1174 | save_ptid = inferior_ptid; |
32178cab | 1175 | |
39f77062 | 1176 | inferior_ptid = ptid; |
32178cab | 1177 | |
5ebd2499 | 1178 | retval = read_register (regnum); |
32178cab | 1179 | |
39f77062 | 1180 | inferior_ptid = save_ptid; |
32178cab MS |
1181 | |
1182 | return retval; | |
1183 | } | |
1184 | ||
5ebd2499 | 1185 | /* Store VALUE into the raw contents of register number REGNUM. */ |
32178cab MS |
1186 | |
1187 | void | |
5ebd2499 | 1188 | write_register (int regnum, LONGEST val) |
32178cab | 1189 | { |
61a0eb5b | 1190 | void *buf; |
32178cab | 1191 | int size; |
5ebd2499 | 1192 | size = REGISTER_RAW_SIZE (regnum); |
32178cab MS |
1193 | buf = alloca (size); |
1194 | store_signed_integer (buf, size, (LONGEST) val); | |
4caf0990 | 1195 | deprecated_write_register_gen (regnum, buf); |
32178cab MS |
1196 | } |
1197 | ||
1198 | void | |
39f77062 | 1199 | write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid) |
32178cab | 1200 | { |
39f77062 | 1201 | ptid_t save_ptid; |
32178cab | 1202 | |
39f77062 | 1203 | if (ptid_equal (ptid, inferior_ptid)) |
32178cab | 1204 | { |
5ebd2499 | 1205 | write_register (regnum, val); |
32178cab MS |
1206 | return; |
1207 | } | |
1208 | ||
39f77062 | 1209 | save_ptid = inferior_ptid; |
32178cab | 1210 | |
39f77062 | 1211 | inferior_ptid = ptid; |
32178cab | 1212 | |
5ebd2499 | 1213 | write_register (regnum, val); |
32178cab | 1214 | |
39f77062 | 1215 | inferior_ptid = save_ptid; |
32178cab MS |
1216 | } |
1217 | ||
1218 | /* SUPPLY_REGISTER() | |
1219 | ||
5ebd2499 | 1220 | Record that register REGNUM contains VAL. This is used when the |
32178cab MS |
1221 | value is obtained from the inferior or core dump, so there is no |
1222 | need to store the value there. | |
1223 | ||
1224 | If VAL is a NULL pointer, then it's probably an unsupported register. | |
5ebd2499 | 1225 | We just set its value to all zeros. We might want to record this |
32178cab MS |
1226 | fact, and report it to the users of read_register and friends. */ |
1227 | ||
1228 | void | |
1aaa5f99 | 1229 | supply_register (int regnum, const void *val) |
32178cab MS |
1230 | { |
1231 | #if 1 | |
39f77062 | 1232 | if (! ptid_equal (registers_ptid, inferior_ptid)) |
32178cab MS |
1233 | { |
1234 | registers_changed (); | |
39f77062 | 1235 | registers_ptid = inferior_ptid; |
32178cab MS |
1236 | } |
1237 | #endif | |
1238 | ||
7302a204 | 1239 | set_register_cached (regnum, 1); |
32178cab | 1240 | if (val) |
3fadccb3 | 1241 | memcpy (register_buffer (current_regcache, regnum), val, |
5ebd2499 | 1242 | REGISTER_RAW_SIZE (regnum)); |
32178cab | 1243 | else |
3fadccb3 | 1244 | memset (register_buffer (current_regcache, regnum), '\000', |
5ebd2499 | 1245 | REGISTER_RAW_SIZE (regnum)); |
32178cab MS |
1246 | |
1247 | /* On some architectures, e.g. HPPA, there are a few stray bits in | |
1248 | some registers, that the rest of the code would like to ignore. */ | |
1249 | ||
61a0eb5b AC |
1250 | /* NOTE: cagney/2001-03-16: The macro CLEAN_UP_REGISTER_VALUE is |
1251 | going to be deprecated. Instead architectures will leave the raw | |
1252 | register value as is and instead clean things up as they pass | |
d8124050 | 1253 | through the method gdbarch_pseudo_register_read() clean up the |
61a0eb5b AC |
1254 | values. */ |
1255 | ||
4ee3352d | 1256 | #ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE |
0b434a00 AC |
1257 | DEPRECATED_CLEAN_UP_REGISTER_VALUE \ |
1258 | (regnum, register_buffer (current_regcache, regnum)); | |
32178cab MS |
1259 | #endif |
1260 | } | |
1261 | ||
193cb69f AC |
1262 | void |
1263 | regcache_collect (int regnum, void *buf) | |
1264 | { | |
3fadccb3 AC |
1265 | memcpy (buf, register_buffer (current_regcache, regnum), |
1266 | REGISTER_RAW_SIZE (regnum)); | |
193cb69f AC |
1267 | } |
1268 | ||
1269 | ||
0ba6dca9 AC |
1270 | /* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special |
1271 | handling for registers PC, SP, and FP. */ | |
32178cab | 1272 | |
cde9ea48 AC |
1273 | /* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc(), |
1274 | read_sp(), and deprecated_read_fp(), will eventually be replaced by | |
1275 | per-frame methods. Instead of relying on the global INFERIOR_PTID, | |
1276 | they will use the contextual information provided by the FRAME. | |
1277 | These functions do not belong in the register cache. */ | |
32178cab | 1278 | |
cde9ea48 AC |
1279 | /* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(), |
1280 | write_pc_pid(), write_pc(), and deprecated_read_fp(), all need to | |
1281 | be replaced by something that does not rely on global state. But | |
1282 | what? */ | |
32178cab MS |
1283 | |
1284 | CORE_ADDR | |
39f77062 | 1285 | read_pc_pid (ptid_t ptid) |
32178cab | 1286 | { |
39f77062 | 1287 | ptid_t saved_inferior_ptid; |
32178cab MS |
1288 | CORE_ADDR pc_val; |
1289 | ||
39f77062 KB |
1290 | /* In case ptid != inferior_ptid. */ |
1291 | saved_inferior_ptid = inferior_ptid; | |
1292 | inferior_ptid = ptid; | |
32178cab | 1293 | |
cde9ea48 AC |
1294 | if (TARGET_READ_PC_P ()) |
1295 | pc_val = TARGET_READ_PC (ptid); | |
1296 | /* Else use per-frame method on get_current_frame. */ | |
1297 | else if (PC_REGNUM >= 0) | |
1298 | { | |
1299 | CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid); | |
1300 | CORE_ADDR pc_val = ADDR_BITS_REMOVE (raw_val); | |
1301 | return pc_val; | |
1302 | } | |
1303 | else | |
1304 | internal_error (__FILE__, __LINE__, "read_pc_pid: Unable to find PC"); | |
32178cab | 1305 | |
39f77062 | 1306 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1307 | return pc_val; |
1308 | } | |
1309 | ||
1310 | CORE_ADDR | |
1311 | read_pc (void) | |
1312 | { | |
39f77062 | 1313 | return read_pc_pid (inferior_ptid); |
32178cab MS |
1314 | } |
1315 | ||
32178cab | 1316 | void |
39f77062 | 1317 | generic_target_write_pc (CORE_ADDR pc, ptid_t ptid) |
32178cab MS |
1318 | { |
1319 | #ifdef PC_REGNUM | |
1320 | if (PC_REGNUM >= 0) | |
39f77062 | 1321 | write_register_pid (PC_REGNUM, pc, ptid); |
32178cab | 1322 | if (NPC_REGNUM >= 0) |
39f77062 | 1323 | write_register_pid (NPC_REGNUM, pc + 4, ptid); |
32178cab | 1324 | #else |
8e65ff28 AC |
1325 | internal_error (__FILE__, __LINE__, |
1326 | "generic_target_write_pc"); | |
32178cab MS |
1327 | #endif |
1328 | } | |
1329 | ||
1330 | void | |
39f77062 | 1331 | write_pc_pid (CORE_ADDR pc, ptid_t ptid) |
32178cab | 1332 | { |
39f77062 | 1333 | ptid_t saved_inferior_ptid; |
32178cab | 1334 | |
39f77062 KB |
1335 | /* In case ptid != inferior_ptid. */ |
1336 | saved_inferior_ptid = inferior_ptid; | |
1337 | inferior_ptid = ptid; | |
32178cab | 1338 | |
39f77062 | 1339 | TARGET_WRITE_PC (pc, ptid); |
32178cab | 1340 | |
39f77062 | 1341 | inferior_ptid = saved_inferior_ptid; |
32178cab MS |
1342 | } |
1343 | ||
1344 | void | |
1345 | write_pc (CORE_ADDR pc) | |
1346 | { | |
39f77062 | 1347 | write_pc_pid (pc, inferior_ptid); |
32178cab MS |
1348 | } |
1349 | ||
1350 | /* Cope with strage ways of getting to the stack and frame pointers */ | |
1351 | ||
32178cab MS |
1352 | CORE_ADDR |
1353 | read_sp (void) | |
1354 | { | |
bd1ce8ba AC |
1355 | if (TARGET_READ_SP_P ()) |
1356 | return TARGET_READ_SP (); | |
a9e5fdc2 AC |
1357 | else if (gdbarch_unwind_sp_p (current_gdbarch)) |
1358 | return get_frame_sp (get_current_frame ()); | |
bd1ce8ba | 1359 | else if (SP_REGNUM >= 0) |
a9e5fdc2 AC |
1360 | /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions |
1361 | about the architecture so put it at the end. */ | |
bd1ce8ba AC |
1362 | return read_register (SP_REGNUM); |
1363 | internal_error (__FILE__, __LINE__, "read_sp: Unable to find SP"); | |
32178cab MS |
1364 | } |
1365 | ||
32178cab | 1366 | void |
b46e02f6 | 1367 | deprecated_write_sp (CORE_ADDR val) |
32178cab | 1368 | { |
b46e02f6 AC |
1369 | gdb_assert (SP_REGNUM >= 0); |
1370 | write_register (SP_REGNUM, val); | |
32178cab MS |
1371 | } |
1372 | ||
32178cab | 1373 | CORE_ADDR |
0ba6dca9 | 1374 | deprecated_read_fp (void) |
32178cab | 1375 | { |
0ba6dca9 AC |
1376 | if (DEPRECATED_TARGET_READ_FP_P ()) |
1377 | return DEPRECATED_TARGET_READ_FP (); | |
1378 | else if (DEPRECATED_FP_REGNUM >= 0) | |
1379 | return read_register (DEPRECATED_FP_REGNUM); | |
1380 | else | |
1381 | internal_error (__FILE__, __LINE__, "deprecated_read_fp"); | |
32178cab MS |
1382 | } |
1383 | ||
705152c5 MS |
1384 | /* ARGSUSED */ |
1385 | static void | |
1386 | reg_flush_command (char *command, int from_tty) | |
1387 | { | |
1388 | /* Force-flush the register cache. */ | |
1389 | registers_changed (); | |
1390 | if (from_tty) | |
1391 | printf_filtered ("Register cache flushed.\n"); | |
1392 | } | |
1393 | ||
32178cab MS |
1394 | static void |
1395 | build_regcache (void) | |
3fadccb3 AC |
1396 | { |
1397 | current_regcache = regcache_xmalloc (current_gdbarch); | |
2d28509a | 1398 | current_regcache->readonly_p = 0; |
524d7c18 | 1399 | deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache); |
b923b08d | 1400 | deprecated_register_valid = current_regcache->register_valid_p; |
3fadccb3 AC |
1401 | } |
1402 | ||
af030b9a AC |
1403 | static void |
1404 | dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, | |
1405 | const unsigned char *buf, long len) | |
1406 | { | |
1407 | int i; | |
1408 | switch (endian) | |
1409 | { | |
1410 | case BFD_ENDIAN_BIG: | |
1411 | for (i = 0; i < len; i++) | |
1412 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1413 | break; | |
1414 | case BFD_ENDIAN_LITTLE: | |
1415 | for (i = len - 1; i >= 0; i--) | |
1416 | fprintf_unfiltered (file, "%02x", buf[i]); | |
1417 | break; | |
1418 | default: | |
1419 | internal_error (__FILE__, __LINE__, "Bad switch"); | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | enum regcache_dump_what | |
1424 | { | |
b59ff9d5 | 1425 | regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups |
af030b9a AC |
1426 | }; |
1427 | ||
1428 | static void | |
1429 | regcache_dump (struct regcache *regcache, struct ui_file *file, | |
1430 | enum regcache_dump_what what_to_dump) | |
1431 | { | |
1432 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); | |
b59ff9d5 AC |
1433 | struct gdbarch *gdbarch = regcache->descr->gdbarch; |
1434 | struct reggroup *const *groups = reggroups (gdbarch); | |
af030b9a AC |
1435 | int regnum; |
1436 | int footnote_nr = 0; | |
1437 | int footnote_register_size = 0; | |
1438 | int footnote_register_offset = 0; | |
1439 | int footnote_register_type_name_null = 0; | |
1440 | long register_offset = 0; | |
123a958e | 1441 | unsigned char buf[MAX_REGISTER_SIZE]; |
af030b9a AC |
1442 | |
1443 | #if 0 | |
1444 | fprintf_unfiltered (file, "legacy_p %d\n", regcache->descr->legacy_p); | |
1445 | fprintf_unfiltered (file, "nr_raw_registers %d\n", | |
1446 | regcache->descr->nr_raw_registers); | |
1447 | fprintf_unfiltered (file, "nr_cooked_registers %d\n", | |
1448 | regcache->descr->nr_cooked_registers); | |
1449 | fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", | |
1450 | regcache->descr->sizeof_raw_registers); | |
1451 | fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n", | |
1452 | regcache->descr->sizeof_raw_register_valid_p); | |
af030b9a AC |
1453 | fprintf_unfiltered (file, "NUM_REGS %d\n", NUM_REGS); |
1454 | fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS); | |
1455 | #endif | |
1456 | ||
1457 | gdb_assert (regcache->descr->nr_cooked_registers | |
1458 | == (NUM_REGS + NUM_PSEUDO_REGS)); | |
1459 | ||
1460 | for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++) | |
1461 | { | |
1462 | /* Name. */ | |
1463 | if (regnum < 0) | |
1464 | fprintf_unfiltered (file, " %-10s", "Name"); | |
1465 | else | |
1466 | { | |
1467 | const char *p = REGISTER_NAME (regnum); | |
1468 | if (p == NULL) | |
1469 | p = ""; | |
1470 | else if (p[0] == '\0') | |
1471 | p = "''"; | |
1472 | fprintf_unfiltered (file, " %-10s", p); | |
1473 | } | |
1474 | ||
1475 | /* Number. */ | |
1476 | if (regnum < 0) | |
1477 | fprintf_unfiltered (file, " %4s", "Nr"); | |
1478 | else | |
1479 | fprintf_unfiltered (file, " %4d", regnum); | |
1480 | ||
1481 | /* Relative number. */ | |
1482 | if (regnum < 0) | |
1483 | fprintf_unfiltered (file, " %4s", "Rel"); | |
1484 | else if (regnum < NUM_REGS) | |
1485 | fprintf_unfiltered (file, " %4d", regnum); | |
1486 | else | |
1487 | fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS)); | |
1488 | ||
1489 | /* Offset. */ | |
1490 | if (regnum < 0) | |
1491 | fprintf_unfiltered (file, " %6s ", "Offset"); | |
1492 | else | |
1493 | { | |
1494 | fprintf_unfiltered (file, " %6ld", | |
1495 | regcache->descr->register_offset[regnum]); | |
a7e3c2ad | 1496 | if (register_offset != regcache->descr->register_offset[regnum] |
d3b22ed5 AC |
1497 | || register_offset != REGISTER_BYTE (regnum) |
1498 | || (regnum > 0 | |
1499 | && (regcache->descr->register_offset[regnum] | |
1500 | != (regcache->descr->register_offset[regnum - 1] | |
1501 | + regcache->descr->sizeof_register[regnum - 1]))) | |
1502 | ) | |
af030b9a AC |
1503 | { |
1504 | if (!footnote_register_offset) | |
1505 | footnote_register_offset = ++footnote_nr; | |
1506 | fprintf_unfiltered (file, "*%d", footnote_register_offset); | |
1507 | } | |
1508 | else | |
1509 | fprintf_unfiltered (file, " "); | |
1510 | register_offset = (regcache->descr->register_offset[regnum] | |
1511 | + regcache->descr->sizeof_register[regnum]); | |
1512 | } | |
1513 | ||
1514 | /* Size. */ | |
1515 | if (regnum < 0) | |
1516 | fprintf_unfiltered (file, " %5s ", "Size"); | |
1517 | else | |
1518 | { | |
1519 | fprintf_unfiltered (file, " %5ld", | |
1520 | regcache->descr->sizeof_register[regnum]); | |
1521 | if ((regcache->descr->sizeof_register[regnum] | |
1522 | != REGISTER_RAW_SIZE (regnum)) | |
1523 | || (regcache->descr->sizeof_register[regnum] | |
1524 | != REGISTER_VIRTUAL_SIZE (regnum)) | |
1525 | || (regcache->descr->sizeof_register[regnum] | |
bb425013 AC |
1526 | != TYPE_LENGTH (register_type (regcache->descr->gdbarch, |
1527 | regnum))) | |
af030b9a AC |
1528 | ) |
1529 | { | |
1530 | if (!footnote_register_size) | |
1531 | footnote_register_size = ++footnote_nr; | |
1532 | fprintf_unfiltered (file, "*%d", footnote_register_size); | |
1533 | } | |
1534 | else | |
1535 | fprintf_unfiltered (file, " "); | |
1536 | } | |
1537 | ||
1538 | /* Type. */ | |
b59ff9d5 AC |
1539 | { |
1540 | const char *t; | |
1541 | if (regnum < 0) | |
1542 | t = "Type"; | |
1543 | else | |
1544 | { | |
1545 | static const char blt[] = "builtin_type"; | |
1546 | t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum)); | |
1547 | if (t == NULL) | |
1548 | { | |
1549 | char *n; | |
1550 | if (!footnote_register_type_name_null) | |
1551 | footnote_register_type_name_null = ++footnote_nr; | |
1552 | xasprintf (&n, "*%d", footnote_register_type_name_null); | |
1553 | make_cleanup (xfree, n); | |
1554 | t = n; | |
1555 | } | |
1556 | /* Chop a leading builtin_type. */ | |
1557 | if (strncmp (t, blt, strlen (blt)) == 0) | |
1558 | t += strlen (blt); | |
1559 | } | |
1560 | fprintf_unfiltered (file, " %-15s", t); | |
1561 | } | |
1562 | ||
1563 | /* Leading space always present. */ | |
1564 | fprintf_unfiltered (file, " "); | |
af030b9a AC |
1565 | |
1566 | /* Value, raw. */ | |
1567 | if (what_to_dump == regcache_dump_raw) | |
1568 | { | |
1569 | if (regnum < 0) | |
1570 | fprintf_unfiltered (file, "Raw value"); | |
1571 | else if (regnum >= regcache->descr->nr_raw_registers) | |
1572 | fprintf_unfiltered (file, "<cooked>"); | |
1573 | else if (!regcache_valid_p (regcache, regnum)) | |
1574 | fprintf_unfiltered (file, "<invalid>"); | |
1575 | else | |
1576 | { | |
1577 | regcache_raw_read (regcache, regnum, buf); | |
1578 | fprintf_unfiltered (file, "0x"); | |
1579 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1580 | REGISTER_RAW_SIZE (regnum)); | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | /* Value, cooked. */ | |
1585 | if (what_to_dump == regcache_dump_cooked) | |
1586 | { | |
1587 | if (regnum < 0) | |
1588 | fprintf_unfiltered (file, "Cooked value"); | |
1589 | else | |
1590 | { | |
1591 | regcache_cooked_read (regcache, regnum, buf); | |
1592 | fprintf_unfiltered (file, "0x"); | |
1593 | dump_endian_bytes (file, TARGET_BYTE_ORDER, buf, | |
1594 | REGISTER_VIRTUAL_SIZE (regnum)); | |
1595 | } | |
1596 | } | |
1597 | ||
b59ff9d5 AC |
1598 | /* Group members. */ |
1599 | if (what_to_dump == regcache_dump_groups) | |
1600 | { | |
1601 | if (regnum < 0) | |
1602 | fprintf_unfiltered (file, "Groups"); | |
1603 | else | |
1604 | { | |
1605 | int i; | |
1606 | const char *sep = ""; | |
1607 | for (i = 0; groups[i] != NULL; i++) | |
1608 | { | |
1609 | if (gdbarch_register_reggroup_p (gdbarch, regnum, groups[i])) | |
1610 | { | |
1611 | fprintf_unfiltered (file, "%s%s", sep, reggroup_name (groups[i])); | |
1612 | sep = ","; | |
1613 | } | |
1614 | } | |
1615 | } | |
1616 | } | |
1617 | ||
af030b9a AC |
1618 | fprintf_unfiltered (file, "\n"); |
1619 | } | |
1620 | ||
1621 | if (footnote_register_size) | |
1622 | fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", | |
1623 | footnote_register_size); | |
1624 | if (footnote_register_offset) | |
1625 | fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", | |
1626 | footnote_register_offset); | |
1627 | if (footnote_register_type_name_null) | |
1628 | fprintf_unfiltered (file, | |
1629 | "*%d: Register type's name NULL.\n", | |
1630 | footnote_register_type_name_null); | |
1631 | do_cleanups (cleanups); | |
1632 | } | |
1633 | ||
1634 | static void | |
1635 | regcache_print (char *args, enum regcache_dump_what what_to_dump) | |
1636 | { | |
1637 | if (args == NULL) | |
1638 | regcache_dump (current_regcache, gdb_stdout, what_to_dump); | |
1639 | else | |
1640 | { | |
1641 | struct ui_file *file = gdb_fopen (args, "w"); | |
1642 | if (file == NULL) | |
1643 | perror_with_name ("maintenance print architecture"); | |
1644 | regcache_dump (current_regcache, file, what_to_dump); | |
1645 | ui_file_delete (file); | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | static void | |
1650 | maintenance_print_registers (char *args, int from_tty) | |
1651 | { | |
1652 | regcache_print (args, regcache_dump_none); | |
1653 | } | |
1654 | ||
1655 | static void | |
1656 | maintenance_print_raw_registers (char *args, int from_tty) | |
1657 | { | |
1658 | regcache_print (args, regcache_dump_raw); | |
1659 | } | |
1660 | ||
1661 | static void | |
1662 | maintenance_print_cooked_registers (char *args, int from_tty) | |
1663 | { | |
1664 | regcache_print (args, regcache_dump_cooked); | |
1665 | } | |
1666 | ||
b59ff9d5 AC |
1667 | static void |
1668 | maintenance_print_register_groups (char *args, int from_tty) | |
1669 | { | |
1670 | regcache_print (args, regcache_dump_groups); | |
1671 | } | |
1672 | ||
b9362cc7 AC |
1673 | extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
1674 | ||
32178cab MS |
1675 | void |
1676 | _initialize_regcache (void) | |
1677 | { | |
3fadccb3 AC |
1678 | regcache_descr_handle = register_gdbarch_data (init_regcache_descr, |
1679 | xfree_regcache_descr); | |
1680 | REGISTER_GDBARCH_SWAP (current_regcache); | |
524d7c18 | 1681 | register_gdbarch_swap (&deprecated_registers, sizeof (deprecated_registers), NULL); |
8262ee23 | 1682 | register_gdbarch_swap (&deprecated_register_valid, sizeof (deprecated_register_valid), NULL); |
32178cab | 1683 | register_gdbarch_swap (NULL, 0, build_regcache); |
705152c5 MS |
1684 | |
1685 | add_com ("flushregs", class_maintenance, reg_flush_command, | |
1686 | "Force gdb to flush its register cache (maintainer command)"); | |
39f77062 KB |
1687 | |
1688 | /* Initialize the thread/process associated with the current set of | |
1689 | registers. For now, -1 is special, and means `no current process'. */ | |
1690 | registers_ptid = pid_to_ptid (-1); | |
af030b9a AC |
1691 | |
1692 | add_cmd ("registers", class_maintenance, | |
1693 | maintenance_print_registers, | |
1694 | "Print the internal register configuration.\ | |
1695 | Takes an optional file parameter.", | |
1696 | &maintenanceprintlist); | |
1697 | add_cmd ("raw-registers", class_maintenance, | |
1698 | maintenance_print_raw_registers, | |
1699 | "Print the internal register configuration including raw values.\ | |
1700 | Takes an optional file parameter.", | |
1701 | &maintenanceprintlist); | |
1702 | add_cmd ("cooked-registers", class_maintenance, | |
1703 | maintenance_print_cooked_registers, | |
1704 | "Print the internal register configuration including cooked values.\ | |
b59ff9d5 AC |
1705 | Takes an optional file parameter.", |
1706 | &maintenanceprintlist); | |
1707 | add_cmd ("register-groups", class_maintenance, | |
1708 | maintenance_print_register_groups, | |
1709 | "Print the internal register configuration including each register's group.\ | |
af030b9a AC |
1710 | Takes an optional file parameter.", |
1711 | &maintenanceprintlist); | |
1712 | ||
32178cab | 1713 | } |