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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 | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
424163ea DJ |
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 | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
424163ea DJ |
21 | |
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
23181151 | 24 | #include "gdbcmd.h" |
123dc839 DJ |
25 | #include "gdbtypes.h" |
26 | #include "reggroups.h" | |
424163ea DJ |
27 | #include "target.h" |
28 | #include "target-descriptions.h" | |
29709017 | 29 | #include "vec.h" |
123dc839 | 30 | #include "xml-support.h" |
23181151 | 31 | #include "xml-tdesc.h" |
424163ea DJ |
32 | |
33 | #include "gdb_assert.h" | |
123dc839 DJ |
34 | #include "gdb_obstack.h" |
35 | #include "hashtab.h" | |
424163ea DJ |
36 | |
37 | /* Types. */ | |
38 | ||
29709017 DJ |
39 | typedef struct property |
40 | { | |
23181151 DJ |
41 | char *key; |
42 | char *value; | |
29709017 DJ |
43 | } property_s; |
44 | DEF_VEC_O(property_s); | |
45 | ||
123dc839 DJ |
46 | /* An individual register from a target description. */ |
47 | ||
48 | typedef struct tdesc_reg | |
49 | { | |
50 | /* The name of this register. In standard features, it may be | |
51 | recognized by the architecture support code, or it may be purely | |
52 | for the user. */ | |
53 | char *name; | |
54 | ||
55 | /* The register number used by this target to refer to this | |
56 | register. This is used for remote p/P packets and to determine | |
57 | the ordering of registers in the remote g/G packets. */ | |
58 | long target_regnum; | |
59 | ||
60 | /* If this flag is set, GDB should save and restore this register | |
61 | around calls to an inferior function. */ | |
62 | int save_restore; | |
63 | ||
64 | /* The name of the register group containing this register, or NULL | |
65 | if the group should be automatically determined from the | |
66 | register's type. If this is "general", "float", or "vector", the | |
67 | corresponding "info" command should display this register's | |
68 | value. It can be an arbitrary string, but should be limited to | |
69 | alphanumeric characters and internal hyphens. Currently other | |
70 | strings are ignored (treated as NULL). */ | |
71 | char *group; | |
72 | ||
73 | /* The size of the register, in bits. */ | |
74 | int bitsize; | |
75 | ||
76 | /* The type of the register. This string corresponds to either | |
77 | a named type from the target description or a predefined | |
78 | type from GDB. */ | |
79 | char *type; | |
80 | ||
81 | /* The target-described type corresponding to TYPE, if found. */ | |
82 | struct type *gdb_type; | |
83 | } *tdesc_reg_p; | |
84 | DEF_VEC_P(tdesc_reg_p); | |
85 | ||
86 | /* A named type from a target description. */ | |
87 | typedef struct type *type_p; | |
88 | DEF_VEC_P(type_p); | |
89 | ||
90 | /* A feature from a target description. Each feature is a collection | |
91 | of other elements, e.g. registers and types. */ | |
92 | ||
93 | typedef struct tdesc_feature | |
94 | { | |
95 | /* The name of this feature. It may be recognized by the architecture | |
96 | support code. */ | |
97 | char *name; | |
98 | ||
99 | /* The registers associated with this feature. */ | |
100 | VEC(tdesc_reg_p) *registers; | |
101 | ||
102 | /* The types associated with this feature. */ | |
103 | VEC(type_p) *types; | |
104 | } *tdesc_feature_p; | |
105 | DEF_VEC_P(tdesc_feature_p); | |
106 | ||
107 | /* A target description. */ | |
108 | ||
424163ea DJ |
109 | struct target_desc |
110 | { | |
23181151 DJ |
111 | /* The architecture reported by the target, if any. */ |
112 | const struct bfd_arch_info *arch; | |
113 | ||
29709017 DJ |
114 | /* Any architecture-specific properties specified by the target. */ |
115 | VEC(property_s) *properties; | |
123dc839 DJ |
116 | |
117 | /* The features associated with this target. */ | |
118 | VEC(tdesc_feature_p) *features; | |
119 | }; | |
120 | ||
121 | /* Per-architecture data associated with a target description. The | |
122 | target description may be shared by multiple architectures, but | |
123 | this data is private to one gdbarch. */ | |
124 | ||
125 | struct tdesc_arch_data | |
126 | { | |
127 | /* A list of registers, indexed by GDB's internal register number. | |
128 | During initialization of the gdbarch this list is used to store | |
129 | registers which the architecture assigns a fixed register number. | |
130 | Registers which are NULL in this array, or off the end, are | |
131 | treated as zero-sized and nameless (i.e. placeholders in the | |
132 | numbering). */ | |
133 | VEC(tdesc_reg_p) *registers; | |
134 | ||
135 | /* Functions which report the register name, type, and reggroups for | |
136 | pseudo-registers. */ | |
137 | gdbarch_register_name_ftype *pseudo_register_name; | |
138 | gdbarch_register_type_ftype *pseudo_register_type; | |
139 | gdbarch_register_reggroup_p_ftype *pseudo_register_reggroup_p; | |
424163ea DJ |
140 | }; |
141 | ||
142 | /* Global state. These variables are associated with the current | |
143 | target; if GDB adds support for multiple simultaneous targets, then | |
144 | these variables should become target-specific data. */ | |
145 | ||
146 | /* A flag indicating that a description has already been fetched from | |
147 | the current target, so it should not be queried again. */ | |
148 | ||
149 | static int target_desc_fetched; | |
150 | ||
151 | /* The description fetched from the current target, or NULL if the | |
152 | current target did not supply any description. Only valid when | |
153 | target_desc_fetched is set. Only the description initialization | |
154 | code should access this; normally, the description should be | |
155 | accessed through the gdbarch object. */ | |
156 | ||
157 | static const struct target_desc *current_target_desc; | |
158 | ||
23181151 DJ |
159 | /* Other global variables. */ |
160 | ||
161 | /* The filename to read a target description from. */ | |
162 | ||
163 | static char *target_description_filename; | |
164 | ||
123dc839 DJ |
165 | /* A handle for architecture-specific data associated with the |
166 | target description (see struct tdesc_arch_data). */ | |
167 | ||
168 | static struct gdbarch_data *tdesc_data; | |
169 | ||
424163ea DJ |
170 | /* Fetch the current target's description, and switch the current |
171 | architecture to one which incorporates that description. */ | |
172 | ||
173 | void | |
174 | target_find_description (void) | |
175 | { | |
176 | /* If we've already fetched a description from the target, don't do | |
177 | it again. This allows a target to fetch the description early, | |
178 | during its to_open or to_create_inferior, if it needs extra | |
179 | information about the target to initialize. */ | |
180 | if (target_desc_fetched) | |
181 | return; | |
182 | ||
183 | /* The current architecture should not have any target description | |
184 | specified. It should have been cleared, e.g. when we | |
185 | disconnected from the previous target. */ | |
186 | gdb_assert (gdbarch_target_desc (current_gdbarch) == NULL); | |
187 | ||
23181151 DJ |
188 | /* First try to fetch an XML description from the user-specified |
189 | file. */ | |
190 | current_target_desc = NULL; | |
191 | if (target_description_filename != NULL | |
192 | && *target_description_filename != '\0') | |
193 | current_target_desc | |
194 | = file_read_description_xml (target_description_filename); | |
195 | ||
196 | /* Next try to read the description from the current target using | |
197 | target objects. */ | |
198 | if (current_target_desc == NULL) | |
199 | current_target_desc = target_read_description_xml (¤t_target); | |
200 | ||
201 | /* If that failed try a target-specific hook. */ | |
202 | if (current_target_desc == NULL) | |
203 | current_target_desc = target_read_description (¤t_target); | |
424163ea DJ |
204 | |
205 | /* If a non-NULL description was returned, then update the current | |
206 | architecture. */ | |
207 | if (current_target_desc) | |
208 | { | |
209 | struct gdbarch_info info; | |
210 | ||
211 | gdbarch_info_init (&info); | |
212 | info.target_desc = current_target_desc; | |
213 | if (!gdbarch_update_p (info)) | |
123dc839 DJ |
214 | warning (_("Architecture rejected target-supplied description")); |
215 | else | |
216 | { | |
217 | struct tdesc_arch_data *data; | |
218 | ||
219 | data = gdbarch_data (current_gdbarch, tdesc_data); | |
220 | if (tdesc_has_registers (current_target_desc) | |
221 | && data->registers == NULL) | |
222 | warning (_("Target-supplied registers are not supported " | |
223 | "by the current architecture")); | |
224 | } | |
424163ea DJ |
225 | } |
226 | ||
227 | /* Now that we know this description is usable, record that we | |
228 | fetched it. */ | |
229 | target_desc_fetched = 1; | |
230 | } | |
231 | ||
232 | /* Discard any description fetched from the current target, and switch | |
233 | the current architecture to one with no target description. */ | |
234 | ||
235 | void | |
236 | target_clear_description (void) | |
237 | { | |
238 | struct gdbarch_info info; | |
239 | ||
240 | if (!target_desc_fetched) | |
241 | return; | |
242 | ||
243 | target_desc_fetched = 0; | |
244 | current_target_desc = NULL; | |
245 | ||
246 | gdbarch_info_init (&info); | |
247 | if (!gdbarch_update_p (info)) | |
248 | internal_error (__FILE__, __LINE__, | |
249 | _("Could not remove target-supplied description")); | |
250 | } | |
251 | ||
252 | /* Return the global current target description. This should only be | |
253 | used by gdbarch initialization code; most access should be through | |
254 | an existing gdbarch. */ | |
255 | ||
256 | const struct target_desc * | |
257 | target_current_description (void) | |
258 | { | |
259 | if (target_desc_fetched) | |
260 | return current_target_desc; | |
261 | ||
262 | return NULL; | |
263 | } | |
23181151 DJ |
264 | \f |
265 | ||
123dc839 | 266 | /* Direct accessors for target descriptions. */ |
424163ea | 267 | |
29709017 DJ |
268 | /* Return the string value of a property named KEY, or NULL if the |
269 | property was not specified. */ | |
270 | ||
271 | const char * | |
272 | tdesc_property (const struct target_desc *target_desc, const char *key) | |
273 | { | |
274 | struct property *prop; | |
275 | int ix; | |
276 | ||
277 | for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop); | |
278 | ix++) | |
279 | if (strcmp (prop->key, key) == 0) | |
280 | return prop->value; | |
281 | ||
282 | return NULL; | |
283 | } | |
284 | ||
23181151 DJ |
285 | /* Return the BFD architecture associated with this target |
286 | description, or NULL if no architecture was specified. */ | |
287 | ||
288 | const struct bfd_arch_info * | |
289 | tdesc_architecture (const struct target_desc *target_desc) | |
290 | { | |
291 | return target_desc->arch; | |
292 | } | |
293 | \f | |
294 | ||
123dc839 DJ |
295 | /* Return 1 if this target description includes any registers. */ |
296 | ||
297 | int | |
298 | tdesc_has_registers (const struct target_desc *target_desc) | |
299 | { | |
300 | int ix; | |
301 | struct tdesc_feature *feature; | |
302 | ||
303 | if (target_desc == NULL) | |
304 | return 0; | |
305 | ||
306 | for (ix = 0; | |
307 | VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature); | |
308 | ix++) | |
309 | if (! VEC_empty (tdesc_reg_p, feature->registers)) | |
310 | return 1; | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | /* Return the feature with the given name, if present, or NULL if | |
316 | the named feature is not found. */ | |
317 | ||
318 | const struct tdesc_feature * | |
319 | tdesc_find_feature (const struct target_desc *target_desc, | |
320 | const char *name) | |
321 | { | |
322 | int ix; | |
323 | struct tdesc_feature *feature; | |
324 | ||
325 | for (ix = 0; | |
326 | VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature); | |
327 | ix++) | |
328 | if (strcmp (feature->name, name) == 0) | |
329 | return feature; | |
330 | ||
331 | return NULL; | |
332 | } | |
333 | ||
334 | /* Return the name of FEATURE. */ | |
335 | ||
336 | const char * | |
337 | tdesc_feature_name (const struct tdesc_feature *feature) | |
338 | { | |
339 | return feature->name; | |
340 | } | |
341 | ||
342 | /* Return the type associated with ID in the context of FEATURE, or | |
343 | NULL if none. */ | |
344 | ||
345 | struct type * | |
346 | tdesc_named_type (const struct tdesc_feature *feature, const char *id) | |
347 | { | |
348 | int ix; | |
349 | struct type *gdb_type; | |
350 | ||
351 | /* First try target-defined types. */ | |
352 | for (ix = 0; VEC_iterate (type_p, feature->types, ix, gdb_type); ix++) | |
353 | if (strcmp (TYPE_NAME (gdb_type), id) == 0) | |
354 | return gdb_type; | |
355 | ||
356 | /* Next try some predefined types. Note that none of these types | |
357 | depend on the current architecture; some of the builtin_type_foo | |
358 | variables are swapped based on the architecture. */ | |
359 | if (strcmp (id, "int8") == 0) | |
360 | return builtin_type_int8; | |
361 | ||
362 | if (strcmp (id, "int16") == 0) | |
363 | return builtin_type_int16; | |
364 | ||
365 | if (strcmp (id, "int32") == 0) | |
366 | return builtin_type_int32; | |
367 | ||
368 | if (strcmp (id, "int64") == 0) | |
369 | return builtin_type_int64; | |
370 | ||
371 | if (strcmp (id, "uint8") == 0) | |
372 | return builtin_type_uint8; | |
373 | ||
374 | if (strcmp (id, "uint16") == 0) | |
375 | return builtin_type_uint16; | |
376 | ||
377 | if (strcmp (id, "uint32") == 0) | |
378 | return builtin_type_uint32; | |
379 | ||
380 | if (strcmp (id, "uint64") == 0) | |
381 | return builtin_type_uint64; | |
382 | ||
6e3bbd1a PB |
383 | if (strcmp (id, "ieee_single") == 0) |
384 | return builtin_type_ieee_single; | |
385 | ||
386 | if (strcmp (id, "ieee_double") == 0) | |
387 | return builtin_type_ieee_double; | |
388 | ||
123dc839 DJ |
389 | if (strcmp (id, "arm_fpa_ext") == 0) |
390 | return builtin_type_arm_ext; | |
391 | ||
392 | return NULL; | |
393 | } | |
394 | \f | |
395 | ||
396 | /* Support for registers from target descriptions. */ | |
397 | ||
398 | /* Construct the per-gdbarch data. */ | |
399 | ||
400 | static void * | |
401 | tdesc_data_init (struct obstack *obstack) | |
402 | { | |
403 | struct tdesc_arch_data *data; | |
404 | ||
405 | data = OBSTACK_ZALLOC (obstack, struct tdesc_arch_data); | |
406 | return data; | |
407 | } | |
408 | ||
409 | /* Similar, but for the temporary copy used during architecture | |
410 | initialization. */ | |
411 | ||
412 | struct tdesc_arch_data * | |
413 | tdesc_data_alloc (void) | |
414 | { | |
415 | return XZALLOC (struct tdesc_arch_data); | |
416 | } | |
417 | ||
418 | /* Free something allocated by tdesc_data_alloc, if it is not going | |
419 | to be used (for instance if it was unsuitable for the | |
420 | architecture). */ | |
421 | ||
422 | void | |
423 | tdesc_data_cleanup (void *data_untyped) | |
424 | { | |
425 | struct tdesc_arch_data *data = data_untyped; | |
426 | ||
427 | VEC_free (tdesc_reg_p, data->registers); | |
428 | xfree (data); | |
429 | } | |
430 | ||
431 | /* Search FEATURE for a register named NAME. */ | |
432 | ||
433 | int | |
434 | tdesc_numbered_register (const struct tdesc_feature *feature, | |
435 | struct tdesc_arch_data *data, | |
436 | int regno, const char *name) | |
437 | { | |
438 | int ixr; | |
439 | struct tdesc_reg *reg; | |
440 | ||
441 | for (ixr = 0; | |
442 | VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg); | |
443 | ixr++) | |
444 | if (strcasecmp (reg->name, name) == 0) | |
445 | { | |
446 | /* Make sure the vector includes a REGNO'th element. */ | |
447 | while (regno >= VEC_length (tdesc_reg_p, data->registers)) | |
448 | VEC_safe_push (tdesc_reg_p, data->registers, NULL); | |
449 | VEC_replace (tdesc_reg_p, data->registers, regno, reg); | |
450 | return 1; | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | /* Search FEATURE for a register whose name is in NAMES. */ | |
457 | ||
458 | int | |
459 | tdesc_numbered_register_choices (const struct tdesc_feature *feature, | |
460 | struct tdesc_arch_data *data, | |
461 | int regno, const char *const names[]) | |
462 | { | |
463 | int i; | |
464 | ||
465 | for (i = 0; names[i] != NULL; i++) | |
466 | if (tdesc_numbered_register (feature, data, regno, names[i])) | |
467 | return 1; | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | /* Look up a register by its GDB internal register number. */ | |
473 | ||
474 | static struct tdesc_reg * | |
475 | tdesc_find_register (struct gdbarch *gdbarch, int regno) | |
476 | { | |
477 | struct tdesc_reg *reg; | |
478 | struct tdesc_arch_data *data; | |
479 | ||
480 | data = gdbarch_data (gdbarch, tdesc_data); | |
481 | if (regno < VEC_length (tdesc_reg_p, data->registers)) | |
482 | return VEC_index (tdesc_reg_p, data->registers, regno); | |
483 | else | |
484 | return NULL; | |
485 | } | |
486 | ||
f8b73d13 DJ |
487 | /* Return the name of register REGNO, from the target description or |
488 | from an architecture-provided pseudo_register_name method. */ | |
489 | ||
490 | const char * | |
123dc839 DJ |
491 | tdesc_register_name (int regno) |
492 | { | |
493 | struct tdesc_reg *reg = tdesc_find_register (current_gdbarch, regno); | |
494 | int num_regs = gdbarch_num_regs (current_gdbarch); | |
495 | int num_pseudo_regs = gdbarch_num_pseudo_regs (current_gdbarch); | |
496 | ||
497 | if (reg != NULL) | |
498 | return reg->name; | |
499 | ||
500 | if (regno >= num_regs && regno < num_regs + num_pseudo_regs) | |
501 | { | |
502 | struct tdesc_arch_data *data = gdbarch_data (current_gdbarch, | |
503 | tdesc_data); | |
504 | gdb_assert (data->pseudo_register_name != NULL); | |
505 | return data->pseudo_register_name (regno); | |
506 | } | |
507 | ||
508 | return ""; | |
509 | } | |
510 | ||
511 | static struct type * | |
512 | tdesc_register_type (struct gdbarch *gdbarch, int regno) | |
513 | { | |
514 | struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno); | |
515 | int num_regs = gdbarch_num_regs (gdbarch); | |
516 | int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch); | |
517 | ||
518 | if (reg == NULL && regno >= num_regs && regno < num_regs + num_pseudo_regs) | |
519 | { | |
520 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
521 | gdb_assert (data->pseudo_register_type != NULL); | |
522 | return data->pseudo_register_type (gdbarch, regno); | |
523 | } | |
524 | ||
525 | if (reg == NULL) | |
526 | /* Return "int0_t", since "void" has a misleading size of one. */ | |
527 | return builtin_type_int0; | |
528 | ||
529 | /* First check for a predefined or target defined type. */ | |
530 | if (reg->gdb_type) | |
531 | return reg->gdb_type; | |
532 | ||
533 | /* Next try size-sensitive type shortcuts. */ | |
534 | if (strcmp (reg->type, "float") == 0) | |
535 | { | |
536 | if (reg->bitsize == gdbarch_float_bit (gdbarch)) | |
537 | return builtin_type_float; | |
538 | else if (reg->bitsize == gdbarch_double_bit (gdbarch)) | |
539 | return builtin_type_double; | |
540 | else if (reg->bitsize == gdbarch_long_double_bit (gdbarch)) | |
541 | return builtin_type_long_double; | |
542 | } | |
543 | else if (strcmp (reg->type, "int") == 0) | |
544 | { | |
545 | if (reg->bitsize == gdbarch_long_bit (gdbarch)) | |
546 | return builtin_type_long; | |
547 | else if (reg->bitsize == TARGET_CHAR_BIT) | |
548 | return builtin_type_char; | |
549 | else if (reg->bitsize == gdbarch_short_bit (gdbarch)) | |
550 | return builtin_type_short; | |
551 | else if (reg->bitsize == gdbarch_int_bit (gdbarch)) | |
552 | return builtin_type_int; | |
553 | else if (reg->bitsize == gdbarch_long_long_bit (gdbarch)) | |
554 | return builtin_type_long_long; | |
555 | else if (reg->bitsize == gdbarch_ptr_bit (gdbarch)) | |
556 | /* A bit desperate by this point... */ | |
557 | return builtin_type_void_data_ptr; | |
558 | } | |
d9cc5895 DJ |
559 | else if (strcmp (reg->type, "code_ptr") == 0) |
560 | return builtin_type_void_func_ptr; | |
561 | else if (strcmp (reg->type, "data_ptr") == 0) | |
562 | return builtin_type_void_data_ptr; | |
123dc839 DJ |
563 | else |
564 | internal_error (__FILE__, __LINE__, | |
565 | "Register \"%s\" has an unknown type \"%s\"", | |
566 | reg->name, reg->type); | |
567 | ||
568 | warning (_("Register \"%s\" has an unsupported size (%d bits)"), | |
569 | reg->name, reg->bitsize); | |
570 | return builtin_type_long; | |
571 | } | |
572 | ||
573 | static int | |
574 | tdesc_remote_register_number (struct gdbarch *gdbarch, int regno) | |
575 | { | |
576 | struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno); | |
577 | ||
578 | if (reg != NULL) | |
579 | return reg->target_regnum; | |
580 | else | |
581 | return -1; | |
582 | } | |
583 | ||
584 | /* Check whether REGNUM is a member of REGGROUP. Registers from the | |
585 | target description may be classified as general, float, or vector. | |
f8b73d13 DJ |
586 | Unlike a gdbarch register_reggroup_p method, this function will |
587 | return -1 if it does not know; the caller should handle registers | |
588 | with no specified group. | |
123dc839 DJ |
589 | |
590 | Arbitrary strings (other than "general", "float", and "vector") | |
591 | from the description are not used; they cause the register to be | |
592 | displayed in "info all-registers" but excluded from "info | |
593 | registers" et al. The names of containing features are also not | |
594 | used. This might be extended to display registers in some more | |
595 | useful groupings. | |
596 | ||
597 | The save-restore flag is also implemented here. */ | |
598 | ||
f8b73d13 DJ |
599 | int |
600 | tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno, | |
601 | struct reggroup *reggroup) | |
123dc839 | 602 | { |
123dc839 DJ |
603 | struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno); |
604 | ||
123dc839 DJ |
605 | if (reg != NULL && reg->group != NULL) |
606 | { | |
607 | int general_p = 0, float_p = 0, vector_p = 0; | |
608 | ||
609 | if (strcmp (reg->group, "general") == 0) | |
610 | general_p = 1; | |
611 | else if (strcmp (reg->group, "float") == 0) | |
612 | float_p = 1; | |
613 | else if (strcmp (reg->group, "vector") == 0) | |
614 | vector_p = 1; | |
615 | ||
616 | if (reggroup == float_reggroup) | |
617 | return float_p; | |
618 | ||
619 | if (reggroup == vector_reggroup) | |
620 | return vector_p; | |
621 | ||
622 | if (reggroup == general_reggroup) | |
623 | return general_p; | |
624 | } | |
625 | ||
626 | if (reg != NULL | |
627 | && (reggroup == save_reggroup || reggroup == restore_reggroup)) | |
628 | return reg->save_restore; | |
629 | ||
f8b73d13 DJ |
630 | return -1; |
631 | } | |
632 | ||
633 | /* Check whether REGNUM is a member of REGGROUP. Registers with no | |
634 | group specified go to the default reggroup function and are handled | |
635 | by type. */ | |
636 | ||
637 | static int | |
638 | tdesc_register_reggroup_p (struct gdbarch *gdbarch, int regno, | |
639 | struct reggroup *reggroup) | |
640 | { | |
641 | int num_regs = gdbarch_num_regs (gdbarch); | |
642 | int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch); | |
643 | int ret; | |
644 | ||
645 | if (regno >= num_regs && regno < num_regs + num_pseudo_regs) | |
646 | { | |
647 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
648 | gdb_assert (data->pseudo_register_reggroup_p != NULL); | |
649 | return data->pseudo_register_reggroup_p (gdbarch, regno, reggroup); | |
650 | } | |
651 | ||
652 | ret = tdesc_register_in_reggroup_p (gdbarch, regno, reggroup); | |
653 | if (ret != -1) | |
654 | return ret; | |
655 | ||
123dc839 DJ |
656 | return default_register_reggroup_p (gdbarch, regno, reggroup); |
657 | } | |
658 | ||
659 | /* Record architecture-specific functions to call for pseudo-register | |
660 | support. */ | |
661 | ||
662 | void | |
663 | set_tdesc_pseudo_register_name (struct gdbarch *gdbarch, | |
664 | gdbarch_register_name_ftype *pseudo_name) | |
665 | { | |
666 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
667 | ||
668 | data->pseudo_register_name = pseudo_name; | |
669 | } | |
670 | ||
671 | void | |
672 | set_tdesc_pseudo_register_type (struct gdbarch *gdbarch, | |
673 | gdbarch_register_type_ftype *pseudo_type) | |
674 | { | |
675 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
676 | ||
677 | data->pseudo_register_type = pseudo_type; | |
678 | } | |
679 | ||
680 | void | |
681 | set_tdesc_pseudo_register_reggroup_p | |
682 | (struct gdbarch *gdbarch, | |
683 | gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p) | |
684 | { | |
685 | struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data); | |
686 | ||
687 | data->pseudo_register_reggroup_p = pseudo_reggroup_p; | |
688 | } | |
689 | ||
690 | /* Update GDBARCH to use the target description for registers. */ | |
691 | ||
692 | void | |
693 | tdesc_use_registers (struct gdbarch *gdbarch, | |
694 | struct tdesc_arch_data *early_data) | |
695 | { | |
696 | int num_regs = gdbarch_num_regs (gdbarch); | |
697 | int i, ixf, ixr; | |
698 | const struct target_desc *target_desc; | |
699 | struct tdesc_feature *feature; | |
700 | struct tdesc_reg *reg; | |
701 | struct tdesc_arch_data *data; | |
702 | htab_t reg_hash; | |
703 | ||
704 | target_desc = gdbarch_target_desc (gdbarch); | |
705 | ||
706 | /* We can't use the description for registers if it doesn't describe | |
707 | any. This function should only be called after validating | |
708 | registers, so the caller should know that registers are | |
709 | included. */ | |
710 | gdb_assert (tdesc_has_registers (target_desc)); | |
711 | ||
712 | data = gdbarch_data (gdbarch, tdesc_data); | |
713 | data->registers = early_data->registers; | |
714 | xfree (early_data); | |
715 | ||
716 | /* Build up a set of all registers, so that we can assign register | |
717 | numbers where needed. The hash table expands as necessary, so | |
718 | the initial size is arbitrary. */ | |
719 | reg_hash = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL); | |
720 | for (ixf = 0; | |
721 | VEC_iterate (tdesc_feature_p, target_desc->features, ixf, feature); | |
722 | ixf++) | |
723 | for (ixr = 0; | |
724 | VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg); | |
725 | ixr++) | |
726 | { | |
727 | void **slot = htab_find_slot (reg_hash, reg, INSERT); | |
728 | ||
729 | *slot = reg; | |
730 | } | |
731 | ||
732 | /* Remove any registers which were assigned numbers by the | |
733 | architecture. */ | |
734 | for (ixr = 0; VEC_iterate (tdesc_reg_p, data->registers, ixr, reg); ixr++) | |
735 | if (reg) | |
736 | htab_remove_elt (reg_hash, reg); | |
737 | ||
738 | /* Assign numbers to the remaining registers and add them to the | |
f57d151a | 739 | list of registers. The new numbers are always above gdbarch_num_regs. |
123dc839 DJ |
740 | Iterate over the features, not the hash table, so that the order |
741 | matches that in the target description. */ | |
742 | ||
743 | gdb_assert (VEC_length (tdesc_reg_p, data->registers) <= num_regs); | |
744 | while (VEC_length (tdesc_reg_p, data->registers) < num_regs) | |
745 | VEC_safe_push (tdesc_reg_p, data->registers, NULL); | |
746 | for (ixf = 0; | |
747 | VEC_iterate (tdesc_feature_p, target_desc->features, ixf, feature); | |
748 | ixf++) | |
749 | for (ixr = 0; | |
750 | VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg); | |
751 | ixr++) | |
752 | if (htab_find (reg_hash, reg) != NULL) | |
753 | { | |
754 | VEC_safe_push (tdesc_reg_p, data->registers, reg); | |
755 | num_regs++; | |
756 | } | |
757 | ||
758 | htab_delete (reg_hash); | |
759 | ||
760 | /* Update the architecture. */ | |
761 | set_gdbarch_num_regs (gdbarch, num_regs); | |
762 | set_gdbarch_register_name (gdbarch, tdesc_register_name); | |
763 | set_gdbarch_register_type (gdbarch, tdesc_register_type); | |
764 | set_gdbarch_remote_register_number (gdbarch, | |
765 | tdesc_remote_register_number); | |
766 | set_gdbarch_register_reggroup_p (gdbarch, tdesc_register_reggroup_p); | |
767 | } | |
768 | \f | |
769 | ||
424163ea DJ |
770 | /* Methods for constructing a target description. */ |
771 | ||
123dc839 DJ |
772 | static void |
773 | tdesc_free_reg (struct tdesc_reg *reg) | |
774 | { | |
775 | xfree (reg->name); | |
776 | xfree (reg->type); | |
777 | xfree (reg->group); | |
778 | xfree (reg); | |
779 | } | |
780 | ||
781 | void | |
782 | tdesc_create_reg (struct tdesc_feature *feature, const char *name, | |
783 | int regnum, int save_restore, const char *group, | |
784 | int bitsize, const char *type) | |
785 | { | |
786 | struct tdesc_reg *reg = XZALLOC (struct tdesc_reg); | |
787 | ||
788 | reg->name = xstrdup (name); | |
789 | reg->target_regnum = regnum; | |
790 | reg->save_restore = save_restore; | |
791 | reg->group = group ? xstrdup (group) : NULL; | |
792 | reg->bitsize = bitsize; | |
c8c12293 | 793 | reg->type = type ? xstrdup (type) : xstrdup ("<unknown>"); |
123dc839 DJ |
794 | |
795 | /* If the register's type is target-defined, look it up now. We may not | |
796 | have easy access to the containing feature when we want it later. */ | |
797 | reg->gdb_type = tdesc_named_type (feature, reg->type); | |
798 | ||
799 | VEC_safe_push (tdesc_reg_p, feature->registers, reg); | |
800 | } | |
801 | ||
802 | static void | |
803 | tdesc_free_feature (struct tdesc_feature *feature) | |
804 | { | |
805 | struct tdesc_reg *reg; | |
806 | int ix; | |
807 | ||
808 | for (ix = 0; VEC_iterate (tdesc_reg_p, feature->registers, ix, reg); ix++) | |
809 | tdesc_free_reg (reg); | |
810 | VEC_free (tdesc_reg_p, feature->registers); | |
811 | ||
812 | /* There is no easy way to free xmalloc-allocated types, nor is | |
813 | there a way to allocate types on an obstack not associated with | |
814 | an objfile. Therefore we never free types. Since we only ever | |
815 | parse an identical XML document once, this memory leak is mostly | |
816 | contained. */ | |
817 | VEC_free (type_p, feature->types); | |
818 | ||
819 | xfree (feature->name); | |
820 | xfree (feature); | |
821 | } | |
822 | ||
823 | struct tdesc_feature * | |
824 | tdesc_create_feature (struct target_desc *tdesc, const char *name) | |
825 | { | |
826 | struct tdesc_feature *new_feature = XZALLOC (struct tdesc_feature); | |
827 | ||
828 | new_feature->name = xstrdup (name); | |
829 | ||
830 | VEC_safe_push (tdesc_feature_p, tdesc->features, new_feature); | |
831 | return new_feature; | |
832 | } | |
833 | ||
834 | void | |
835 | tdesc_record_type (struct tdesc_feature *feature, struct type *type) | |
836 | { | |
837 | /* The type's ID should be used as its TYPE_NAME. */ | |
838 | gdb_assert (TYPE_NAME (type) != NULL); | |
839 | ||
840 | VEC_safe_push (type_p, feature->types, type); | |
841 | } | |
842 | ||
424163ea DJ |
843 | struct target_desc * |
844 | allocate_target_description (void) | |
845 | { | |
846 | return XZALLOC (struct target_desc); | |
847 | } | |
29709017 | 848 | |
23181151 DJ |
849 | static void |
850 | free_target_description (void *arg) | |
851 | { | |
852 | struct target_desc *target_desc = arg; | |
123dc839 | 853 | struct tdesc_feature *feature; |
23181151 DJ |
854 | struct property *prop; |
855 | int ix; | |
856 | ||
123dc839 DJ |
857 | for (ix = 0; |
858 | VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature); | |
859 | ix++) | |
860 | tdesc_free_feature (feature); | |
861 | VEC_free (tdesc_feature_p, target_desc->features); | |
862 | ||
23181151 DJ |
863 | for (ix = 0; |
864 | VEC_iterate (property_s, target_desc->properties, ix, prop); | |
865 | ix++) | |
866 | { | |
867 | xfree (prop->key); | |
868 | xfree (prop->value); | |
869 | } | |
870 | VEC_free (property_s, target_desc->properties); | |
871 | ||
872 | xfree (target_desc); | |
873 | } | |
874 | ||
875 | struct cleanup * | |
876 | make_cleanup_free_target_description (struct target_desc *target_desc) | |
877 | { | |
878 | return make_cleanup (free_target_description, target_desc); | |
879 | } | |
880 | ||
29709017 DJ |
881 | void |
882 | set_tdesc_property (struct target_desc *target_desc, | |
883 | const char *key, const char *value) | |
884 | { | |
885 | struct property *prop, new_prop; | |
886 | int ix; | |
887 | ||
888 | gdb_assert (key != NULL && value != NULL); | |
889 | ||
890 | for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop); | |
891 | ix++) | |
892 | if (strcmp (prop->key, key) == 0) | |
893 | internal_error (__FILE__, __LINE__, | |
894 | _("Attempted to add duplicate property \"%s\""), key); | |
895 | ||
23181151 DJ |
896 | new_prop.key = xstrdup (key); |
897 | new_prop.value = xstrdup (value); | |
29709017 DJ |
898 | VEC_safe_push (property_s, target_desc->properties, &new_prop); |
899 | } | |
23181151 DJ |
900 | |
901 | void | |
902 | set_tdesc_architecture (struct target_desc *target_desc, | |
903 | const struct bfd_arch_info *arch) | |
904 | { | |
905 | target_desc->arch = arch; | |
906 | } | |
907 | \f | |
908 | ||
909 | static struct cmd_list_element *tdesc_set_cmdlist, *tdesc_show_cmdlist; | |
910 | static struct cmd_list_element *tdesc_unset_cmdlist; | |
911 | ||
912 | /* Helper functions for the CLI commands. */ | |
913 | ||
914 | static void | |
915 | set_tdesc_cmd (char *args, int from_tty) | |
916 | { | |
917 | help_list (tdesc_set_cmdlist, "set tdesc ", -1, gdb_stdout); | |
918 | } | |
919 | ||
920 | static void | |
921 | show_tdesc_cmd (char *args, int from_tty) | |
922 | { | |
923 | cmd_show_list (tdesc_show_cmdlist, from_tty, ""); | |
924 | } | |
925 | ||
926 | static void | |
927 | unset_tdesc_cmd (char *args, int from_tty) | |
928 | { | |
929 | help_list (tdesc_unset_cmdlist, "unset tdesc ", -1, gdb_stdout); | |
930 | } | |
931 | ||
932 | static void | |
933 | set_tdesc_filename_cmd (char *args, int from_tty, | |
934 | struct cmd_list_element *c) | |
935 | { | |
936 | target_clear_description (); | |
937 | target_find_description (); | |
938 | } | |
939 | ||
940 | static void | |
941 | show_tdesc_filename_cmd (struct ui_file *file, int from_tty, | |
942 | struct cmd_list_element *c, | |
943 | const char *value) | |
944 | { | |
945 | if (value != NULL && *value != '\0') | |
946 | printf_filtered (_("\ | |
947 | The target description will be read from \"%s\".\n"), | |
948 | value); | |
949 | else | |
950 | printf_filtered (_("\ | |
951 | The target description will be read from the target.\n")); | |
952 | } | |
953 | ||
954 | static void | |
955 | unset_tdesc_filename_cmd (char *args, int from_tty) | |
956 | { | |
957 | xfree (target_description_filename); | |
958 | target_description_filename = NULL; | |
959 | target_clear_description (); | |
960 | target_find_description (); | |
961 | } | |
962 | ||
963 | void | |
964 | _initialize_target_descriptions (void) | |
965 | { | |
123dc839 DJ |
966 | tdesc_data = gdbarch_data_register_pre_init (tdesc_data_init); |
967 | ||
23181151 DJ |
968 | add_prefix_cmd ("tdesc", class_maintenance, set_tdesc_cmd, _("\ |
969 | Set target description specific variables."), | |
970 | &tdesc_set_cmdlist, "set tdesc ", | |
971 | 0 /* allow-unknown */, &setlist); | |
972 | add_prefix_cmd ("tdesc", class_maintenance, show_tdesc_cmd, _("\ | |
973 | Show target description specific variables."), | |
974 | &tdesc_show_cmdlist, "show tdesc ", | |
975 | 0 /* allow-unknown */, &showlist); | |
976 | add_prefix_cmd ("tdesc", class_maintenance, unset_tdesc_cmd, _("\ | |
977 | Unset target description specific variables."), | |
978 | &tdesc_unset_cmdlist, "unset tdesc ", | |
979 | 0 /* allow-unknown */, &unsetlist); | |
980 | ||
981 | add_setshow_filename_cmd ("filename", class_obscure, | |
982 | &target_description_filename, | |
983 | _("\ | |
984 | Set the file to read for an XML target description"), _("\ | |
985 | Show the file to read for an XML target description"), _("\ | |
986 | When set, GDB will read the target description from a local\n\ | |
987 | file instead of querying the remote target."), | |
988 | set_tdesc_filename_cmd, | |
989 | show_tdesc_filename_cmd, | |
990 | &tdesc_set_cmdlist, &tdesc_show_cmdlist); | |
991 | ||
992 | add_cmd ("filename", class_obscure, unset_tdesc_filename_cmd, _("\ | |
993 | Unset the file to read for an XML target description. When unset,\n\ | |
994 | GDB will read the description from the target."), | |
995 | &tdesc_unset_cmdlist); | |
996 | } |