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424163ea DJ |
1 | /* Target description support for GDB. |
2 | ||
6aba47ca | 3 | Copyright (C) 2006, 2007 Free Software Foundation, Inc. |
424163ea DJ |
4 | |
5 | Contributed by CodeSourcery. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
22 | Boston, MA 02110-1301, USA. */ | |
23 | ||
24 | #include "defs.h" | |
25 | #include "arch-utils.h" | |
23181151 | 26 | #include "gdbcmd.h" |
123dc839 DJ |
27 | #include "gdbtypes.h" |
28 | #include "reggroups.h" | |
424163ea DJ |
29 | #include "target.h" |
30 | #include "target-descriptions.h" | |
29709017 | 31 | #include "vec.h" |
123dc839 | 32 | #include "xml-support.h" |
23181151 | 33 | #include "xml-tdesc.h" |
424163ea DJ |
34 | |
35 | #include "gdb_assert.h" | |
123dc839 DJ |
36 | #include "gdb_obstack.h" |
37 | #include "hashtab.h" | |
424163ea DJ |
38 | |
39 | /* Types. */ | |
40 | ||
29709017 DJ |
41 | typedef struct property |
42 | { | |
23181151 DJ |
43 | char *key; |
44 | char *value; | |
29709017 DJ |
45 | } property_s; |
46 | DEF_VEC_O(property_s); | |
47 | ||
123dc839 DJ |
48 | /* An individual register from a target description. */ |
49 | ||
50 | typedef struct tdesc_reg | |
51 | { | |
52 | /* The name of this register. In standard features, it may be | |
53 | recognized by the architecture support code, or it may be purely | |
54 | for the user. */ | |
55 | char *name; | |
56 | ||
57 | /* The register number used by this target to refer to this | |
58 | register. This is used for remote p/P packets and to determine | |
59 | the ordering of registers in the remote g/G packets. */ | |
60 | long target_regnum; | |
61 | ||
62 | /* If this flag is set, GDB should save and restore this register | |
63 | around calls to an inferior function. */ | |
64 | int save_restore; | |
65 | ||
66 | /* The name of the register group containing this register, or NULL | |
67 | if the group should be automatically determined from the | |
68 | register's type. If this is "general", "float", or "vector", the | |
69 | corresponding "info" command should display this register's | |
70 | value. It can be an arbitrary string, but should be limited to | |
71 | alphanumeric characters and internal hyphens. Currently other | |
72 | strings are ignored (treated as NULL). */ | |
73 | char *group; | |
74 | ||
75 | /* The size of the register, in bits. */ | |
76 | int bitsize; | |
77 | ||
78 | /* The type of the register. This string corresponds to either | |
79 | a named type from the target description or a predefined | |
80 | type from GDB. */ | |
81 | char *type; | |
82 | ||
83 | /* The target-described type corresponding to TYPE, if found. */ | |
84 | struct type *gdb_type; | |
85 | } *tdesc_reg_p; | |
86 | DEF_VEC_P(tdesc_reg_p); | |
87 | ||
88 | /* A named type from a target description. */ | |
89 | typedef struct type *type_p; | |
90 | DEF_VEC_P(type_p); | |
91 | ||
92 | /* A feature from a target description. Each feature is a collection | |
93 | of other elements, e.g. registers and types. */ | |
94 | ||
95 | typedef struct tdesc_feature | |
96 | { | |
97 | /* The name of this feature. It may be recognized by the architecture | |
98 | support code. */ | |
99 | char *name; | |
100 | ||
101 | /* The registers associated with this feature. */ | |
102 | VEC(tdesc_reg_p) *registers; | |
103 | ||
104 | /* The types associated with this feature. */ | |
105 | VEC(type_p) *types; | |
106 | } *tdesc_feature_p; | |
107 | DEF_VEC_P(tdesc_feature_p); | |
108 | ||
109 | /* A target description. */ | |
110 | ||
424163ea DJ |
111 | struct target_desc |
112 | { | |
23181151 DJ |
113 | /* The architecture reported by the target, if any. */ |
114 | const struct bfd_arch_info *arch; | |
115 | ||
29709017 DJ |
116 | /* Any architecture-specific properties specified by the target. */ |
117 | VEC(property_s) *properties; | |
123dc839 DJ |
118 | |
119 | /* The features associated with this target. */ | |
120 | VEC(tdesc_feature_p) *features; | |
121 | }; | |
122 | ||
123 | /* Per-architecture data associated with a target description. The | |
124 | target description may be shared by multiple architectures, but | |
125 | this data is private to one gdbarch. */ | |
126 | ||
127 | struct tdesc_arch_data | |
128 | { | |
129 | /* A list of registers, indexed by GDB's internal register number. | |
130 | During initialization of the gdbarch this list is used to store | |
131 | registers which the architecture assigns a fixed register number. | |
132 | Registers which are NULL in this array, or off the end, are | |
133 | treated as zero-sized and nameless (i.e. placeholders in the | |
134 | numbering). */ | |
135 | VEC(tdesc_reg_p) *registers; | |
136 | ||
137 | /* Functions which report the register name, type, and reggroups for | |
138 | pseudo-registers. */ | |
139 | gdbarch_register_name_ftype *pseudo_register_name; | |
140 | gdbarch_register_type_ftype *pseudo_register_type; | |
141 | gdbarch_register_reggroup_p_ftype *pseudo_register_reggroup_p; | |
424163ea DJ |
142 | }; |
143 | ||
144 | /* Global state. These variables are associated with the current | |
145 | target; if GDB adds support for multiple simultaneous targets, then | |
146 | these variables should become target-specific data. */ | |
147 | ||
148 | /* A flag indicating that a description has already been fetched from | |
149 | the current target, so it should not be queried again. */ | |
150 | ||
151 | static int target_desc_fetched; | |
152 | ||
153 | /* The description fetched from the current target, or NULL if the | |
154 | current target did not supply any description. Only valid when | |
155 | target_desc_fetched is set. Only the description initialization | |
156 | code should access this; normally, the description should be | |
157 | accessed through the gdbarch object. */ | |
158 | ||
159 | static const struct target_desc *current_target_desc; | |
160 | ||
23181151 DJ |
161 | /* Other global variables. */ |
162 | ||
163 | /* The filename to read a target description from. */ | |
164 | ||
165 | static char *target_description_filename; | |
166 | ||
123dc839 DJ |
167 | /* A handle for architecture-specific data associated with the |
168 | target description (see struct tdesc_arch_data). */ | |
169 | ||
170 | static struct gdbarch_data *tdesc_data; | |
171 | ||
424163ea DJ |
172 | /* Fetch the current target's description, and switch the current |
173 | architecture to one which incorporates that description. */ | |
174 | ||
175 | void | |
176 | target_find_description (void) | |
177 | { | |
178 | /* If we've already fetched a description from the target, don't do | |
179 | it again. This allows a target to fetch the description early, | |
180 | during its to_open or to_create_inferior, if it needs extra | |
181 | information about the target to initialize. */ | |
182 | if (target_desc_fetched) | |
183 | return; | |
184 | ||
185 | /* The current architecture should not have any target description | |
186 | specified. It should have been cleared, e.g. when we | |
187 | disconnected from the previous target. */ | |
188 | gdb_assert (gdbarch_target_desc (current_gdbarch) == NULL); | |
189 | ||
23181151 DJ |
190 | /* First try to fetch an XML description from the user-specified |
191 | file. */ | |
192 | current_target_desc = NULL; | |
193 | if (target_description_filename != NULL | |
194 | && *target_description_filename != '\0') | |
195 | current_target_desc | |
196 | = file_read_description_xml (target_description_filename); | |
197 | ||
198 | /* Next try to read the description from the current target using | |
199 | target objects. */ | |
200 | if (current_target_desc == NULL) | |
201 | current_target_desc = target_read_description_xml (¤t_target); | |
202 | ||
203 | /* If that failed try a target-specific hook. */ | |
204 | if (current_target_desc == NULL) | |
205 | current_target_desc = target_read_description (¤t_target); | |
424163ea DJ |
206 | |
207 | /* If a non-NULL description was returned, then update the current | |
208 | architecture. */ | |
209 | if (current_target_desc) | |
210 | { | |
211 | struct gdbarch_info info; | |
212 | ||
213 | gdbarch_info_init (&info); | |
214 | info.target_desc = current_target_desc; | |
215 | if (!gdbarch_update_p (info)) | |
123dc839 DJ |
216 | warning (_("Architecture rejected target-supplied description")); |
217 | else | |
218 | { | |
219 | struct tdesc_arch_data *data; | |
220 | ||
221 | data = gdbarch_data (current_gdbarch, tdesc_data); | |
222 | if (tdesc_has_registers (current_target_desc) | |
223 | && data->registers == NULL) | |
224 | warning (_("Target-supplied registers are not supported " | |
225 | "by the current architecture")); | |
226 | } | |
424163ea DJ |
227 | } |
228 | ||
229 | /* Now that we know this description is usable, record that we | |
230 | fetched it. */ | |
231 | target_desc_fetched = 1; | |
232 | } | |
233 | ||
234 | /* Discard any description fetched from the current target, and switch | |
235 | the current architecture to one with no target description. */ | |
236 | ||
237 | void | |
238 | target_clear_description (void) | |
239 | { | |
240 | struct gdbarch_info info; | |
241 | ||
242 | if (!target_desc_fetched) | |
243 | return; | |
244 | ||
245 | target_desc_fetched = 0; | |
246 | current_target_desc = NULL; | |
247 | ||
248 | gdbarch_info_init (&info); | |
249 | if (!gdbarch_update_p (info)) | |
250 | internal_error (__FILE__, __LINE__, | |
251 | _("Could not remove target-supplied description")); | |
252 | } | |
253 | ||
254 | /* Return the global current target description. This should only be | |
255 | used by gdbarch initialization code; most access should be through | |
256 | an existing gdbarch. */ | |
257 | ||
258 | const struct target_desc * | |
259 | target_current_description (void) | |
260 | { | |
261 | if (target_desc_fetched) | |
262 | return current_target_desc; | |
263 | ||
264 | return NULL; | |
265 | } | |
23181151 DJ |
266 | \f |
267 | ||
123dc839 | 268 | /* Direct accessors for target descriptions. */ |
424163ea | 269 | |
29709017 DJ |
270 | /* Return the string value of a property named KEY, or NULL if the |
271 | property was not specified. */ | |
272 | ||
273 | const char * | |
274 | tdesc_property (const struct target_desc *target_desc, const char *key) | |
275 | { | |
276 | struct property *prop; | |
277 | int ix; | |
278 | ||
279 | for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop); | |
280 | ix++) | |
281 | if (strcmp (prop->key, key) == 0) | |
282 | return prop->value; | |
283 | ||
284 | return NULL; | |
285 | } | |
286 | ||
23181151 DJ |
287 | /* Return the BFD architecture associated with this target |
288 | description, or NULL if no architecture was specified. */ | |
289 | ||
290 | const struct bfd_arch_info * | |
291 | tdesc_architecture (const struct target_desc *target_desc) | |
292 | { | |
293 | return target_desc->arch; | |
294 | } | |
295 | \f | |
296 | ||
123dc839 DJ |
297 | /* Return 1 if this target description includes any registers. */ |
298 | ||
299 | int | |
300 | tdesc_has_registers (const struct target_desc *target_desc) | |
301 | { | |
302 | int ix; | |
303 | struct tdesc_feature *feature; | |
304 | ||
305 | if (target_desc == NULL) | |
306 | return 0; | |
307 | ||
308 | for (ix = 0; | |
309 | VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature); | |
310 | ix++) | |
311 | if (! VEC_empty (tdesc_reg_p, feature->registers)) | |
312 | return 1; | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | /* Return the feature with the given name, if present, or NULL if | |
318 | the named feature is not found. */ | |
319 | ||
320 | const struct tdesc_feature * | |
321 | tdesc_find_feature (const struct target_desc *target_desc, | |
322 | const char *name) | |
323 | { | |
324 | int ix; | |
325 | struct tdesc_feature *feature; | |
326 | ||
327 | for (ix = 0; | |
328 | VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature); | |
329 | ix++) | |
330 | if (strcmp (feature->name, name) == 0) | |
331 | return feature; | |
332 | ||
333 | return NULL; | |
334 | } | |
335 | ||
336 | /* Return the name of FEATURE. */ | |
337 | ||
338 | const char * | |
339 | tdesc_feature_name (const struct tdesc_feature *feature) | |
340 | { | |
341 | return feature->name; | |
342 | } | |
343 | ||
344 | /* Return the type associated with ID in the context of FEATURE, or | |
345 | NULL if none. */ | |
346 | ||
347 | struct type * | |
348 | tdesc_named_type (const struct tdesc_feature *feature, const char *id) | |
349 | { | |
350 | int ix; | |
351 | struct type *gdb_type; | |
352 | ||
353 | /* First try target-defined types. */ | |
354 | for (ix = 0; VEC_iterate (type_p, feature->types, ix, gdb_type); ix++) | |
355 | if (strcmp (TYPE_NAME (gdb_type), id) == 0) | |
356 | return gdb_type; | |
357 | ||
358 | /* Next try some predefined types. Note that none of these types | |
359 | depend on the current architecture; some of the builtin_type_foo | |
360 | variables are swapped based on the architecture. */ | |
361 | if (strcmp (id, "int8") == 0) | |
362 | return builtin_type_int8; | |
363 | ||
364 | if (strcmp (id, "int16") == 0) | |
365 | return builtin_type_int16; | |
366 | ||
367 | if (strcmp (id, "int32") == 0) | |
368 | return builtin_type_int32; | |
369 | ||
370 | if (strcmp (id, "int64") == 0) | |
371 | return builtin_type_int64; | |
372 | ||
373 | if (strcmp (id, "uint8") == 0) | |
374 | return builtin_type_uint8; | |
375 | ||
376 | if (strcmp (id, "uint16") == 0) | |
377 | return builtin_type_uint16; | |
378 | ||
379 | if (strcmp (id, "uint32") == 0) | |
380 | return builtin_type_uint32; | |
381 | ||
382 | if (strcmp (id, "uint64") == 0) | |
383 | return builtin_type_uint64; | |
384 | ||
6e3bbd1a PB |
385 | if (strcmp (id, "ieee_single") == 0) |
386 | return builtin_type_ieee_single; | |
387 | ||
388 | if (strcmp (id, "ieee_double") == 0) | |
389 | return builtin_type_ieee_double; | |
390 | ||
123dc839 DJ |
391 | if (strcmp (id, "arm_fpa_ext") == 0) |
392 | return builtin_type_arm_ext; | |
393 | ||
394 | return NULL; | |
395 | } | |
396 | \f | |
397 | ||
398 | /* Support for registers from target descriptions. */ | |
399 | ||
400 | /* Construct the per-gdbarch data. */ | |
401 | ||
402 | static void * | |
403 | tdesc_data_init (struct obstack *obstack) | |
404 | { | |
405 | struct tdesc_arch_data *data; | |
406 | ||
407 | data = OBSTACK_ZALLOC (obstack, struct tdesc_arch_data); | |
408 | return data; | |
409 | } | |
410 | ||
411 | /* Similar, but for the temporary copy used during architecture | |
412 | initialization. */ | |
413 | ||
414 | struct tdesc_arch_data * | |
415 | tdesc_data_alloc (void) | |
416 | { | |
417 | return XZALLOC (struct tdesc_arch_data); | |
418 | } | |
419 | ||
420 | /* Free something allocated by tdesc_data_alloc, if it is not going | |
421 | to be used (for instance if it was unsuitable for the | |
422 | architecture). */ | |
423 | ||
424 | void | |
425 | tdesc_data_cleanup (void *data_untyped) | |
426 | { | |
427 | struct tdesc_arch_data *data = data_untyped; | |
428 | ||
429 | VEC_free (tdesc_reg_p, data->registers); | |
430 | xfree (data); | |
431 | } | |
432 | ||
433 | /* Search FEATURE for a register named NAME. */ | |
434 | ||
435 | int | |
436 | tdesc_numbered_register (const struct tdesc_feature *feature, | |
437 | struct tdesc_arch_data *data, | |
438 | int regno, const char *name) | |
439 | { | |
440 | int ixr; | |
441 | struct tdesc_reg *reg; | |
442 | ||
443 | for (ixr = 0; | |
444 | VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg); | |
445 | ixr++) | |
446 | if (strcasecmp (reg->name, name) == 0) | |
447 | { | |
448 | /* Make sure the vector includes a REGNO'th element. */ | |
449 | while (regno >= VEC_length (tdesc_reg_p, data->registers)) | |
450 | VEC_safe_push (tdesc_reg_p, data->registers, NULL); | |
451 | VEC_replace (tdesc_reg_p, data->registers, regno, reg); | |
452 | return 1; | |
453 | } | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | /* Search FEATURE for a register whose name is in NAMES. */ | |
459 | ||
460 | int | |
461 | tdesc_numbered_register_choices (const struct tdesc_feature *feature, | |
462 | struct tdesc_arch_data *data, | |
463 | int regno, const char *const names[]) | |
464 | { | |
465 | int i; | |
466 | ||
467 | for (i = 0; names[i] != NULL; i++) | |
468 | if (tdesc_numbered_register (feature, data, regno, names[i])) | |
469 | return 1; | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | /* Look up a register by its GDB internal register number. */ | |
475 | ||
476 | static struct tdesc_reg * | |
477 | tdesc_find_register (struct gdbarch *gdbarch, int regno) | |
478 | { | |
479 | struct tdesc_reg *reg; | |
480 | struct tdesc_arch_data *data; | |
481 | ||
482 | data = gdbarch_data (gdbarch, tdesc_data); | |
483 | if (regno < VEC_length (tdesc_reg_p, data->registers)) | |
484 | return VEC_index (tdesc_reg_p, data->registers, regno); | |
485 | else | |
486 | return NULL; | |
487 | } | |
488 | ||
489 | static const char * | |
490 | tdesc_register_name (int regno) | |
491 | { | |
492 | struct tdesc_reg *reg = tdesc_find_register (current_gdbarch, regno); | |
493 | int num_regs = gdbarch_num_regs (current_gdbarch); | |
494 | int num_pseudo_regs = gdbarch_num_pseudo_regs (current_gdbarch); | |
495 | ||
496 | if (reg != NULL) | |
497 | return reg->name; | |
498 | ||
499 | if (regno >= num_regs && regno < num_regs + num_pseudo_regs) | |
500 | { | |
501 | struct tdesc_arch_data *data = gdbarch_data (current_gdbarch, | |
502 | tdesc_data); | |
503 | gdb_assert (data->pseudo_register_name != NULL); | |
504 | return data->pseudo_register_name (regno); | |
505 | } | |
506 | ||
507 | return ""; | |
508 | } | |
509 | ||
510 | static struct type * | |
511 | tdesc_register_type (struct gdbarch *gdbarch, int regno) | |
512 | { | |
513 | struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno); | |
514 | int num_regs = gdbarch_num_regs (gdbarch); | |
515 | int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch); | |
516 | ||
517 | if (reg == NULL && regno >= num_regs && regno < num_regs + num_pseudo_regs) | |
518 | { | |
519 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
520 | gdb_assert (data->pseudo_register_type != NULL); | |
521 | return data->pseudo_register_type (gdbarch, regno); | |
522 | } | |
523 | ||
524 | if (reg == NULL) | |
525 | /* Return "int0_t", since "void" has a misleading size of one. */ | |
526 | return builtin_type_int0; | |
527 | ||
528 | /* First check for a predefined or target defined type. */ | |
529 | if (reg->gdb_type) | |
530 | return reg->gdb_type; | |
531 | ||
532 | /* Next try size-sensitive type shortcuts. */ | |
533 | if (strcmp (reg->type, "float") == 0) | |
534 | { | |
535 | if (reg->bitsize == gdbarch_float_bit (gdbarch)) | |
536 | return builtin_type_float; | |
537 | else if (reg->bitsize == gdbarch_double_bit (gdbarch)) | |
538 | return builtin_type_double; | |
539 | else if (reg->bitsize == gdbarch_long_double_bit (gdbarch)) | |
540 | return builtin_type_long_double; | |
541 | } | |
542 | else if (strcmp (reg->type, "int") == 0) | |
543 | { | |
544 | if (reg->bitsize == gdbarch_long_bit (gdbarch)) | |
545 | return builtin_type_long; | |
546 | else if (reg->bitsize == TARGET_CHAR_BIT) | |
547 | return builtin_type_char; | |
548 | else if (reg->bitsize == gdbarch_short_bit (gdbarch)) | |
549 | return builtin_type_short; | |
550 | else if (reg->bitsize == gdbarch_int_bit (gdbarch)) | |
551 | return builtin_type_int; | |
552 | else if (reg->bitsize == gdbarch_long_long_bit (gdbarch)) | |
553 | return builtin_type_long_long; | |
554 | else if (reg->bitsize == gdbarch_ptr_bit (gdbarch)) | |
555 | /* A bit desperate by this point... */ | |
556 | return builtin_type_void_data_ptr; | |
557 | } | |
d9cc5895 DJ |
558 | else if (strcmp (reg->type, "code_ptr") == 0) |
559 | return builtin_type_void_func_ptr; | |
560 | else if (strcmp (reg->type, "data_ptr") == 0) | |
561 | return builtin_type_void_data_ptr; | |
123dc839 DJ |
562 | else |
563 | internal_error (__FILE__, __LINE__, | |
564 | "Register \"%s\" has an unknown type \"%s\"", | |
565 | reg->name, reg->type); | |
566 | ||
567 | warning (_("Register \"%s\" has an unsupported size (%d bits)"), | |
568 | reg->name, reg->bitsize); | |
569 | return builtin_type_long; | |
570 | } | |
571 | ||
572 | static int | |
573 | tdesc_remote_register_number (struct gdbarch *gdbarch, int regno) | |
574 | { | |
575 | struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno); | |
576 | ||
577 | if (reg != NULL) | |
578 | return reg->target_regnum; | |
579 | else | |
580 | return -1; | |
581 | } | |
582 | ||
583 | /* Check whether REGNUM is a member of REGGROUP. Registers from the | |
584 | target description may be classified as general, float, or vector. | |
585 | Registers with no group specified go to the default reggroup | |
586 | function and are handled by type. | |
587 | ||
588 | Arbitrary strings (other than "general", "float", and "vector") | |
589 | from the description are not used; they cause the register to be | |
590 | displayed in "info all-registers" but excluded from "info | |
591 | registers" et al. The names of containing features are also not | |
592 | used. This might be extended to display registers in some more | |
593 | useful groupings. | |
594 | ||
595 | The save-restore flag is also implemented here. */ | |
596 | ||
597 | static int | |
598 | tdesc_register_reggroup_p (struct gdbarch *gdbarch, int regno, | |
599 | struct reggroup *reggroup) | |
600 | { | |
601 | int num_regs = gdbarch_num_regs (gdbarch); | |
602 | int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch); | |
603 | struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno); | |
604 | ||
605 | if (reg == NULL && regno >= num_regs && regno < num_regs + num_pseudo_regs) | |
606 | { | |
607 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
608 | gdb_assert (data->pseudo_register_reggroup_p != NULL); | |
609 | return data->pseudo_register_reggroup_p (gdbarch, regno, reggroup); | |
610 | } | |
611 | ||
612 | if (reg != NULL && reg->group != NULL) | |
613 | { | |
614 | int general_p = 0, float_p = 0, vector_p = 0; | |
615 | ||
616 | if (strcmp (reg->group, "general") == 0) | |
617 | general_p = 1; | |
618 | else if (strcmp (reg->group, "float") == 0) | |
619 | float_p = 1; | |
620 | else if (strcmp (reg->group, "vector") == 0) | |
621 | vector_p = 1; | |
622 | ||
623 | if (reggroup == float_reggroup) | |
624 | return float_p; | |
625 | ||
626 | if (reggroup == vector_reggroup) | |
627 | return vector_p; | |
628 | ||
629 | if (reggroup == general_reggroup) | |
630 | return general_p; | |
631 | } | |
632 | ||
633 | if (reg != NULL | |
634 | && (reggroup == save_reggroup || reggroup == restore_reggroup)) | |
635 | return reg->save_restore; | |
636 | ||
637 | return default_register_reggroup_p (gdbarch, regno, reggroup); | |
638 | } | |
639 | ||
640 | /* Record architecture-specific functions to call for pseudo-register | |
641 | support. */ | |
642 | ||
643 | void | |
644 | set_tdesc_pseudo_register_name (struct gdbarch *gdbarch, | |
645 | gdbarch_register_name_ftype *pseudo_name) | |
646 | { | |
647 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
648 | ||
649 | data->pseudo_register_name = pseudo_name; | |
650 | } | |
651 | ||
652 | void | |
653 | set_tdesc_pseudo_register_type (struct gdbarch *gdbarch, | |
654 | gdbarch_register_type_ftype *pseudo_type) | |
655 | { | |
656 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
657 | ||
658 | data->pseudo_register_type = pseudo_type; | |
659 | } | |
660 | ||
661 | void | |
662 | set_tdesc_pseudo_register_reggroup_p | |
663 | (struct gdbarch *gdbarch, | |
664 | gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p) | |
665 | { | |
666 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
667 | ||
668 | data->pseudo_register_reggroup_p = pseudo_reggroup_p; | |
669 | } | |
670 | ||
671 | /* Update GDBARCH to use the target description for registers. */ | |
672 | ||
673 | void | |
674 | tdesc_use_registers (struct gdbarch *gdbarch, | |
675 | struct tdesc_arch_data *early_data) | |
676 | { | |
677 | int num_regs = gdbarch_num_regs (gdbarch); | |
678 | int i, ixf, ixr; | |
679 | const struct target_desc *target_desc; | |
680 | struct tdesc_feature *feature; | |
681 | struct tdesc_reg *reg; | |
682 | struct tdesc_arch_data *data; | |
683 | htab_t reg_hash; | |
684 | ||
685 | target_desc = gdbarch_target_desc (gdbarch); | |
686 | ||
687 | /* We can't use the description for registers if it doesn't describe | |
688 | any. This function should only be called after validating | |
689 | registers, so the caller should know that registers are | |
690 | included. */ | |
691 | gdb_assert (tdesc_has_registers (target_desc)); | |
692 | ||
693 | data = gdbarch_data (gdbarch, tdesc_data); | |
694 | data->registers = early_data->registers; | |
695 | xfree (early_data); | |
696 | ||
697 | /* Build up a set of all registers, so that we can assign register | |
698 | numbers where needed. The hash table expands as necessary, so | |
699 | the initial size is arbitrary. */ | |
700 | reg_hash = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL); | |
701 | for (ixf = 0; | |
702 | VEC_iterate (tdesc_feature_p, target_desc->features, ixf, feature); | |
703 | ixf++) | |
704 | for (ixr = 0; | |
705 | VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg); | |
706 | ixr++) | |
707 | { | |
708 | void **slot = htab_find_slot (reg_hash, reg, INSERT); | |
709 | ||
710 | *slot = reg; | |
711 | } | |
712 | ||
713 | /* Remove any registers which were assigned numbers by the | |
714 | architecture. */ | |
715 | for (ixr = 0; VEC_iterate (tdesc_reg_p, data->registers, ixr, reg); ixr++) | |
716 | if (reg) | |
717 | htab_remove_elt (reg_hash, reg); | |
718 | ||
719 | /* Assign numbers to the remaining registers and add them to the | |
720 | list of registers. The new numbers are always above NUM_REGS. | |
721 | Iterate over the features, not the hash table, so that the order | |
722 | matches that in the target description. */ | |
723 | ||
724 | gdb_assert (VEC_length (tdesc_reg_p, data->registers) <= num_regs); | |
725 | while (VEC_length (tdesc_reg_p, data->registers) < num_regs) | |
726 | VEC_safe_push (tdesc_reg_p, data->registers, NULL); | |
727 | for (ixf = 0; | |
728 | VEC_iterate (tdesc_feature_p, target_desc->features, ixf, feature); | |
729 | ixf++) | |
730 | for (ixr = 0; | |
731 | VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg); | |
732 | ixr++) | |
733 | if (htab_find (reg_hash, reg) != NULL) | |
734 | { | |
735 | VEC_safe_push (tdesc_reg_p, data->registers, reg); | |
736 | num_regs++; | |
737 | } | |
738 | ||
739 | htab_delete (reg_hash); | |
740 | ||
741 | /* Update the architecture. */ | |
742 | set_gdbarch_num_regs (gdbarch, num_regs); | |
743 | set_gdbarch_register_name (gdbarch, tdesc_register_name); | |
744 | set_gdbarch_register_type (gdbarch, tdesc_register_type); | |
745 | set_gdbarch_remote_register_number (gdbarch, | |
746 | tdesc_remote_register_number); | |
747 | set_gdbarch_register_reggroup_p (gdbarch, tdesc_register_reggroup_p); | |
748 | } | |
749 | \f | |
750 | ||
424163ea DJ |
751 | /* Methods for constructing a target description. */ |
752 | ||
123dc839 DJ |
753 | static void |
754 | tdesc_free_reg (struct tdesc_reg *reg) | |
755 | { | |
756 | xfree (reg->name); | |
757 | xfree (reg->type); | |
758 | xfree (reg->group); | |
759 | xfree (reg); | |
760 | } | |
761 | ||
762 | void | |
763 | tdesc_create_reg (struct tdesc_feature *feature, const char *name, | |
764 | int regnum, int save_restore, const char *group, | |
765 | int bitsize, const char *type) | |
766 | { | |
767 | struct tdesc_reg *reg = XZALLOC (struct tdesc_reg); | |
768 | ||
769 | reg->name = xstrdup (name); | |
770 | reg->target_regnum = regnum; | |
771 | reg->save_restore = save_restore; | |
772 | reg->group = group ? xstrdup (group) : NULL; | |
773 | reg->bitsize = bitsize; | |
774 | reg->type = type ? xstrdup (type) : NULL; | |
775 | ||
776 | /* If the register's type is target-defined, look it up now. We may not | |
777 | have easy access to the containing feature when we want it later. */ | |
778 | reg->gdb_type = tdesc_named_type (feature, reg->type); | |
779 | ||
780 | VEC_safe_push (tdesc_reg_p, feature->registers, reg); | |
781 | } | |
782 | ||
783 | static void | |
784 | tdesc_free_feature (struct tdesc_feature *feature) | |
785 | { | |
786 | struct tdesc_reg *reg; | |
787 | int ix; | |
788 | ||
789 | for (ix = 0; VEC_iterate (tdesc_reg_p, feature->registers, ix, reg); ix++) | |
790 | tdesc_free_reg (reg); | |
791 | VEC_free (tdesc_reg_p, feature->registers); | |
792 | ||
793 | /* There is no easy way to free xmalloc-allocated types, nor is | |
794 | there a way to allocate types on an obstack not associated with | |
795 | an objfile. Therefore we never free types. Since we only ever | |
796 | parse an identical XML document once, this memory leak is mostly | |
797 | contained. */ | |
798 | VEC_free (type_p, feature->types); | |
799 | ||
800 | xfree (feature->name); | |
801 | xfree (feature); | |
802 | } | |
803 | ||
804 | struct tdesc_feature * | |
805 | tdesc_create_feature (struct target_desc *tdesc, const char *name) | |
806 | { | |
807 | struct tdesc_feature *new_feature = XZALLOC (struct tdesc_feature); | |
808 | ||
809 | new_feature->name = xstrdup (name); | |
810 | ||
811 | VEC_safe_push (tdesc_feature_p, tdesc->features, new_feature); | |
812 | return new_feature; | |
813 | } | |
814 | ||
815 | void | |
816 | tdesc_record_type (struct tdesc_feature *feature, struct type *type) | |
817 | { | |
818 | /* The type's ID should be used as its TYPE_NAME. */ | |
819 | gdb_assert (TYPE_NAME (type) != NULL); | |
820 | ||
821 | VEC_safe_push (type_p, feature->types, type); | |
822 | } | |
823 | ||
424163ea DJ |
824 | struct target_desc * |
825 | allocate_target_description (void) | |
826 | { | |
827 | return XZALLOC (struct target_desc); | |
828 | } | |
29709017 | 829 | |
23181151 DJ |
830 | static void |
831 | free_target_description (void *arg) | |
832 | { | |
833 | struct target_desc *target_desc = arg; | |
123dc839 | 834 | struct tdesc_feature *feature; |
23181151 DJ |
835 | struct property *prop; |
836 | int ix; | |
837 | ||
123dc839 DJ |
838 | for (ix = 0; |
839 | VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature); | |
840 | ix++) | |
841 | tdesc_free_feature (feature); | |
842 | VEC_free (tdesc_feature_p, target_desc->features); | |
843 | ||
23181151 DJ |
844 | for (ix = 0; |
845 | VEC_iterate (property_s, target_desc->properties, ix, prop); | |
846 | ix++) | |
847 | { | |
848 | xfree (prop->key); | |
849 | xfree (prop->value); | |
850 | } | |
851 | VEC_free (property_s, target_desc->properties); | |
852 | ||
853 | xfree (target_desc); | |
854 | } | |
855 | ||
856 | struct cleanup * | |
857 | make_cleanup_free_target_description (struct target_desc *target_desc) | |
858 | { | |
859 | return make_cleanup (free_target_description, target_desc); | |
860 | } | |
861 | ||
29709017 DJ |
862 | void |
863 | set_tdesc_property (struct target_desc *target_desc, | |
864 | const char *key, const char *value) | |
865 | { | |
866 | struct property *prop, new_prop; | |
867 | int ix; | |
868 | ||
869 | gdb_assert (key != NULL && value != NULL); | |
870 | ||
871 | for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop); | |
872 | ix++) | |
873 | if (strcmp (prop->key, key) == 0) | |
874 | internal_error (__FILE__, __LINE__, | |
875 | _("Attempted to add duplicate property \"%s\""), key); | |
876 | ||
23181151 DJ |
877 | new_prop.key = xstrdup (key); |
878 | new_prop.value = xstrdup (value); | |
29709017 DJ |
879 | VEC_safe_push (property_s, target_desc->properties, &new_prop); |
880 | } | |
23181151 DJ |
881 | |
882 | void | |
883 | set_tdesc_architecture (struct target_desc *target_desc, | |
884 | const struct bfd_arch_info *arch) | |
885 | { | |
886 | target_desc->arch = arch; | |
887 | } | |
888 | \f | |
889 | ||
890 | static struct cmd_list_element *tdesc_set_cmdlist, *tdesc_show_cmdlist; | |
891 | static struct cmd_list_element *tdesc_unset_cmdlist; | |
892 | ||
893 | /* Helper functions for the CLI commands. */ | |
894 | ||
895 | static void | |
896 | set_tdesc_cmd (char *args, int from_tty) | |
897 | { | |
898 | help_list (tdesc_set_cmdlist, "set tdesc ", -1, gdb_stdout); | |
899 | } | |
900 | ||
901 | static void | |
902 | show_tdesc_cmd (char *args, int from_tty) | |
903 | { | |
904 | cmd_show_list (tdesc_show_cmdlist, from_tty, ""); | |
905 | } | |
906 | ||
907 | static void | |
908 | unset_tdesc_cmd (char *args, int from_tty) | |
909 | { | |
910 | help_list (tdesc_unset_cmdlist, "unset tdesc ", -1, gdb_stdout); | |
911 | } | |
912 | ||
913 | static void | |
914 | set_tdesc_filename_cmd (char *args, int from_tty, | |
915 | struct cmd_list_element *c) | |
916 | { | |
917 | target_clear_description (); | |
918 | target_find_description (); | |
919 | } | |
920 | ||
921 | static void | |
922 | show_tdesc_filename_cmd (struct ui_file *file, int from_tty, | |
923 | struct cmd_list_element *c, | |
924 | const char *value) | |
925 | { | |
926 | if (value != NULL && *value != '\0') | |
927 | printf_filtered (_("\ | |
928 | The target description will be read from \"%s\".\n"), | |
929 | value); | |
930 | else | |
931 | printf_filtered (_("\ | |
932 | The target description will be read from the target.\n")); | |
933 | } | |
934 | ||
935 | static void | |
936 | unset_tdesc_filename_cmd (char *args, int from_tty) | |
937 | { | |
938 | xfree (target_description_filename); | |
939 | target_description_filename = NULL; | |
940 | target_clear_description (); | |
941 | target_find_description (); | |
942 | } | |
943 | ||
944 | void | |
945 | _initialize_target_descriptions (void) | |
946 | { | |
123dc839 DJ |
947 | tdesc_data = gdbarch_data_register_pre_init (tdesc_data_init); |
948 | ||
23181151 DJ |
949 | add_prefix_cmd ("tdesc", class_maintenance, set_tdesc_cmd, _("\ |
950 | Set target description specific variables."), | |
951 | &tdesc_set_cmdlist, "set tdesc ", | |
952 | 0 /* allow-unknown */, &setlist); | |
953 | add_prefix_cmd ("tdesc", class_maintenance, show_tdesc_cmd, _("\ | |
954 | Show target description specific variables."), | |
955 | &tdesc_show_cmdlist, "show tdesc ", | |
956 | 0 /* allow-unknown */, &showlist); | |
957 | add_prefix_cmd ("tdesc", class_maintenance, unset_tdesc_cmd, _("\ | |
958 | Unset target description specific variables."), | |
959 | &tdesc_unset_cmdlist, "unset tdesc ", | |
960 | 0 /* allow-unknown */, &unsetlist); | |
961 | ||
962 | add_setshow_filename_cmd ("filename", class_obscure, | |
963 | &target_description_filename, | |
964 | _("\ | |
965 | Set the file to read for an XML target description"), _("\ | |
966 | Show the file to read for an XML target description"), _("\ | |
967 | When set, GDB will read the target description from a local\n\ | |
968 | file instead of querying the remote target."), | |
969 | set_tdesc_filename_cmd, | |
970 | show_tdesc_filename_cmd, | |
971 | &tdesc_set_cmdlist, &tdesc_show_cmdlist); | |
972 | ||
973 | add_cmd ("filename", class_obscure, unset_tdesc_filename_cmd, _("\ | |
974 | Unset the file to read for an XML target description. When unset,\n\ | |
975 | GDB will read the description from the target."), | |
976 | &tdesc_unset_cmdlist); | |
977 | } |