1 /* XML target description support for GDB.
3 Copyright (C) 2006-2017 Free Software Foundation, Inc.
5 Contributed by CodeSourcery.
7 This file is part of GDB.
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 3 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-descriptions.h"
25 #include "xml-support.h"
26 #include "xml-tdesc.h"
28 #include "filenames.h"
29 #include <unordered_map>
33 This is just to catch obviously wrong values. */
34 #define MAX_FIELD_SIZE 65536
35 #define MAX_FIELD_BITSIZE (MAX_FIELD_SIZE * TARGET_CHAR_BIT)
36 #define MAX_VECTOR_SIZE 65536
38 #if !defined(HAVE_LIBEXPAT)
40 /* Parse DOCUMENT into a target description. Or don't, since we don't have
43 static struct target_desc
*
44 tdesc_parse_xml (const char *document
, xml_fetch_another fetcher
,
47 static int have_warned
;
52 warning (_("Can not parse XML target description; XML support was "
53 "disabled at compile time"));
59 #else /* HAVE_LIBEXPAT */
61 /* A record of every XML description we have parsed. We never discard
62 old descriptions, because we never discard gdbarches. As long as we
63 have a gdbarch referencing this description, we want to have a copy
64 of it here, so that if we parse the same XML document again we can
65 return the same "struct target_desc *"; if they are not singletons,
66 then we will create unnecessary duplicate gdbarches. See
67 gdbarch_list_lookup_by_info. */
69 static std::unordered_map
<std::string
, target_desc
*> xml_cache
;
71 /* Callback data for target description parsing. */
73 struct tdesc_parsing_data
75 /* The target description we are building. */
76 struct target_desc
*tdesc
;
78 /* The target feature we are currently parsing, or last parsed. */
79 struct tdesc_feature
*current_feature
;
81 /* The register number to use for the next register we see, if
82 it does not have its own. This starts at zero. */
85 /* The struct or union we are currently parsing, or last parsed. */
86 struct tdesc_type
*current_type
;
88 /* The byte size of the current struct/flags type, if specified. Zero
89 if not specified. Flags values must specify a size. */
90 int current_type_size
;
93 /* Handle the end of an <architecture> element and its value. */
96 tdesc_end_arch (struct gdb_xml_parser
*parser
,
97 const struct gdb_xml_element
*element
,
98 void *user_data
, const char *body_text
)
100 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
101 const struct bfd_arch_info
*arch
;
103 arch
= bfd_scan_arch (body_text
);
105 gdb_xml_error (parser
, _("Target description specified unknown "
106 "architecture \"%s\""), body_text
);
107 set_tdesc_architecture (data
->tdesc
, arch
);
110 /* Handle the end of an <osabi> element and its value. */
113 tdesc_end_osabi (struct gdb_xml_parser
*parser
,
114 const struct gdb_xml_element
*element
,
115 void *user_data
, const char *body_text
)
117 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
118 enum gdb_osabi osabi
;
120 osabi
= osabi_from_tdesc_string (body_text
);
121 if (osabi
== GDB_OSABI_UNKNOWN
)
122 warning (_("Target description specified unknown osabi \"%s\""),
125 set_tdesc_osabi (data
->tdesc
, osabi
);
128 /* Handle the end of a <compatible> element and its value. */
131 tdesc_end_compatible (struct gdb_xml_parser
*parser
,
132 const struct gdb_xml_element
*element
,
133 void *user_data
, const char *body_text
)
135 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
136 const struct bfd_arch_info
*arch
;
138 arch
= bfd_scan_arch (body_text
);
139 tdesc_add_compatible (data
->tdesc
, arch
);
142 /* Handle the start of a <target> element. */
145 tdesc_start_target (struct gdb_xml_parser
*parser
,
146 const struct gdb_xml_element
*element
,
147 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
149 char *version
= (char *) xml_find_attribute (attributes
, "version")->value
;
151 if (strcmp (version
, "1.0") != 0)
152 gdb_xml_error (parser
,
153 _("Target description has unsupported version \"%s\""),
157 /* Handle the start of a <feature> element. */
160 tdesc_start_feature (struct gdb_xml_parser
*parser
,
161 const struct gdb_xml_element
*element
,
162 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
164 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
165 char *name
= (char *) xml_find_attribute (attributes
, "name")->value
;
167 data
->current_feature
= tdesc_create_feature (data
->tdesc
, name
);
170 /* Handle the start of a <reg> element. Fill in the optional
171 attributes and attach it to the containing feature. */
174 tdesc_start_reg (struct gdb_xml_parser
*parser
,
175 const struct gdb_xml_element
*element
,
176 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
178 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
179 struct gdb_xml_value
*attrs
= VEC_address (gdb_xml_value_s
, attributes
);
183 int bitsize
, regnum
, save_restore
;
185 length
= VEC_length (gdb_xml_value_s
, attributes
);
187 name
= (char *) attrs
[ix
++].value
;
188 bitsize
= * (ULONGEST
*) attrs
[ix
++].value
;
190 if (ix
< length
&& strcmp (attrs
[ix
].name
, "regnum") == 0)
191 regnum
= * (ULONGEST
*) attrs
[ix
++].value
;
193 regnum
= data
->next_regnum
;
195 if (ix
< length
&& strcmp (attrs
[ix
].name
, "type") == 0)
196 type
= (char *) attrs
[ix
++].value
;
200 if (ix
< length
&& strcmp (attrs
[ix
].name
, "group") == 0)
201 group
= (char *) attrs
[ix
++].value
;
205 if (ix
< length
&& strcmp (attrs
[ix
].name
, "save-restore") == 0)
206 save_restore
= * (ULONGEST
*) attrs
[ix
++].value
;
210 if (strcmp (type
, "int") != 0
211 && strcmp (type
, "float") != 0
212 && tdesc_named_type (data
->current_feature
, type
) == NULL
)
213 gdb_xml_error (parser
, _("Register \"%s\" has unknown type \"%s\""),
216 tdesc_create_reg (data
->current_feature
, name
, regnum
, save_restore
, group
,
219 data
->next_regnum
= regnum
+ 1;
222 /* Handle the start of a <union> element. Initialize the type and
223 record it with the current feature. */
226 tdesc_start_union (struct gdb_xml_parser
*parser
,
227 const struct gdb_xml_element
*element
,
228 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
230 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
231 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
;
233 data
->current_type
= tdesc_create_union (data
->current_feature
, id
);
234 data
->current_type_size
= 0;
237 /* Handle the start of a <struct> element. Initialize the type and
238 record it with the current feature. */
241 tdesc_start_struct (struct gdb_xml_parser
*parser
,
242 const struct gdb_xml_element
*element
,
243 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
245 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
246 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
;
247 struct tdesc_type
*type
;
248 struct gdb_xml_value
*attr
;
250 type
= tdesc_create_struct (data
->current_feature
, id
);
251 data
->current_type
= type
;
252 data
->current_type_size
= 0;
254 attr
= xml_find_attribute (attributes
, "size");
257 ULONGEST size
= * (ULONGEST
*) attr
->value
;
259 if (size
> MAX_FIELD_SIZE
)
261 gdb_xml_error (parser
,
262 _("Struct size %s is larger than maximum (%d)"),
263 pulongest (size
), MAX_FIELD_SIZE
);
265 tdesc_set_struct_size (type
, size
);
266 data
->current_type_size
= size
;
271 tdesc_start_flags (struct gdb_xml_parser
*parser
,
272 const struct gdb_xml_element
*element
,
273 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
275 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
276 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
;
277 ULONGEST size
= * (ULONGEST
*)
278 xml_find_attribute (attributes
, "size")->value
;
279 struct tdesc_type
*type
;
281 if (size
> MAX_FIELD_SIZE
)
283 gdb_xml_error (parser
,
284 _("Flags size %s is larger than maximum (%d)"),
285 pulongest (size
), MAX_FIELD_SIZE
);
287 type
= tdesc_create_flags (data
->current_feature
, id
, size
);
289 data
->current_type
= type
;
290 data
->current_type_size
= size
;
294 tdesc_start_enum (struct gdb_xml_parser
*parser
,
295 const struct gdb_xml_element
*element
,
296 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
298 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
299 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
;
300 int size
= * (ULONGEST
*)
301 xml_find_attribute (attributes
, "size")->value
;
302 struct tdesc_type
*type
;
304 if (size
> MAX_FIELD_SIZE
)
306 gdb_xml_error (parser
,
307 _("Enum size %s is larger than maximum (%d)"),
308 pulongest (size
), MAX_FIELD_SIZE
);
310 type
= tdesc_create_enum (data
->current_feature
, id
, size
);
312 data
->current_type
= type
;
313 data
->current_type_size
= 0;
316 /* Handle the start of a <field> element. Attach the field to the
317 current struct, union or flags. */
320 tdesc_start_field (struct gdb_xml_parser
*parser
,
321 const struct gdb_xml_element
*element
,
322 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
324 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
325 struct gdb_xml_value
*attr
;
326 struct tdesc_type
*field_type
;
327 char *field_name
, *field_type_id
;
330 field_name
= (char *) xml_find_attribute (attributes
, "name")->value
;
332 attr
= xml_find_attribute (attributes
, "type");
335 field_type_id
= (char *) attr
->value
;
336 field_type
= tdesc_named_type (data
->current_feature
, field_type_id
);
340 field_type_id
= NULL
;
344 attr
= xml_find_attribute (attributes
, "start");
347 ULONGEST ul_start
= * (ULONGEST
*) attr
->value
;
349 if (ul_start
> MAX_FIELD_BITSIZE
)
351 gdb_xml_error (parser
,
352 _("Field start %s is larger than maximum (%d)"),
353 pulongest (ul_start
), MAX_FIELD_BITSIZE
);
360 attr
= xml_find_attribute (attributes
, "end");
363 ULONGEST ul_end
= * (ULONGEST
*) attr
->value
;
365 if (ul_end
> MAX_FIELD_BITSIZE
)
367 gdb_xml_error (parser
,
368 _("Field end %s is larger than maximum (%d)"),
369 pulongest (ul_end
), MAX_FIELD_BITSIZE
);
378 struct tdesc_type
*t
= data
->current_type
;
380 /* Older versions of gdb can't handle elided end values.
381 Stick with that for now, to help ensure backward compatibility.
382 E.g., If a newer gdbserver is talking to an older gdb. */
384 gdb_xml_error (parser
, _("Missing end value"));
386 if (data
->current_type_size
== 0)
387 gdb_xml_error (parser
,
388 _("Bitfields must live in explicitly sized types"));
390 if (field_type_id
!= NULL
391 && strcmp (field_type_id
, "bool") == 0
394 gdb_xml_error (parser
,
395 _("Boolean fields must be one bit in size"));
399 gdb_xml_error (parser
,
400 _("Bitfield \"%s\" goes past "
401 "64 bits (unsupported)"),
404 /* Assume that the bit numbering in XML is "lsb-zero". Most
405 architectures other than PowerPC use this ordering. In the
406 future, we can add an XML tag to indicate "msb-zero" numbering. */
408 gdb_xml_error (parser
, _("Bitfield \"%s\" has start after end"),
410 if (end
>= data
->current_type_size
* TARGET_CHAR_BIT
)
411 gdb_xml_error (parser
, _("Bitfield \"%s\" does not fit in struct"),
414 if (field_type
!= NULL
)
415 tdesc_add_typed_bitfield (t
, field_name
, start
, end
, field_type
);
416 else if (start
== end
)
417 tdesc_add_flag (t
, start
, field_name
);
419 tdesc_add_bitfield (t
, field_name
, start
, end
);
421 else if (start
== -1 && end
!= -1)
422 gdb_xml_error (parser
, _("End specified but not start"));
423 else if (field_type_id
!= NULL
)
425 /* TDESC_TYPE_FLAGS values are explicitly sized, so the following test
426 catches adding non-bitfield types to flags as well. */
427 if (data
->current_type_size
!= 0)
428 gdb_xml_error (parser
,
429 _("Explicitly sized type cannot "
430 "contain non-bitfield \"%s\""),
433 if (field_type
== NULL
)
434 gdb_xml_error (parser
, _("Field \"%s\" references undefined "
436 field_name
, field_type_id
);
438 tdesc_add_field (data
->current_type
, field_name
, field_type
);
441 gdb_xml_error (parser
, _("Field \"%s\" has neither type nor bit position"),
445 /* Handle the start of an <evalue> element. Attach the value to the
449 tdesc_start_enum_value (struct gdb_xml_parser
*parser
,
450 const struct gdb_xml_element
*element
,
451 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
453 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
454 struct gdb_xml_value
*attr
;
459 field_name
= (char *) xml_find_attribute (attributes
, "name")->value
;
461 attr
= xml_find_attribute (attributes
, "value");
462 ul_value
= * (ULONGEST
*) attr
->value
;
463 if (ul_value
> INT_MAX
)
465 gdb_xml_error (parser
,
466 _("Enum value %s is larger than maximum (%d)"),
467 pulongest (ul_value
), INT_MAX
);
471 tdesc_add_enum_value (data
->current_type
, value
, field_name
);
474 /* Handle the start of a <vector> element. Initialize the type and
475 record it with the current feature. */
478 tdesc_start_vector (struct gdb_xml_parser
*parser
,
479 const struct gdb_xml_element
*element
,
480 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
482 struct tdesc_parsing_data
*data
= (struct tdesc_parsing_data
*) user_data
;
483 struct gdb_xml_value
*attrs
= VEC_address (gdb_xml_value_s
, attributes
);
484 struct tdesc_type
*field_type
;
485 char *id
, *field_type_id
;
488 id
= (char *) attrs
[0].value
;
489 field_type_id
= (char *) attrs
[1].value
;
490 count
= * (ULONGEST
*) attrs
[2].value
;
492 if (count
> MAX_VECTOR_SIZE
)
494 gdb_xml_error (parser
,
495 _("Vector size %s is larger than maximum (%d)"),
496 pulongest (count
), MAX_VECTOR_SIZE
);
499 field_type
= tdesc_named_type (data
->current_feature
, field_type_id
);
500 if (field_type
== NULL
)
501 gdb_xml_error (parser
, _("Vector \"%s\" references undefined type \"%s\""),
504 tdesc_create_vector (data
->current_feature
, id
, field_type
, count
);
507 /* The elements and attributes of an XML target description. */
509 static const struct gdb_xml_attribute field_attributes
[] = {
510 { "name", GDB_XML_AF_NONE
, NULL
, NULL
},
511 { "type", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
512 { "start", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
513 { "end", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
514 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
517 static const struct gdb_xml_attribute enum_value_attributes
[] = {
518 { "name", GDB_XML_AF_NONE
, NULL
, NULL
},
519 { "value", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
520 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
523 static const struct gdb_xml_element struct_union_children
[] = {
524 { "field", field_attributes
, NULL
, GDB_XML_EF_REPEATABLE
,
525 tdesc_start_field
, NULL
},
526 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
529 static const struct gdb_xml_element enum_children
[] = {
530 { "evalue", enum_value_attributes
, NULL
, GDB_XML_EF_REPEATABLE
,
531 tdesc_start_enum_value
, NULL
},
532 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
535 static const struct gdb_xml_attribute reg_attributes
[] = {
536 { "name", GDB_XML_AF_NONE
, NULL
, NULL
},
537 { "bitsize", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
538 { "regnum", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
539 { "type", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
540 { "group", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
541 { "save-restore", GDB_XML_AF_OPTIONAL
,
542 gdb_xml_parse_attr_enum
, gdb_xml_enums_boolean
},
543 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
546 static const struct gdb_xml_attribute struct_union_attributes
[] = {
547 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
548 { "size", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
549 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
552 static const struct gdb_xml_attribute flags_attributes
[] = {
553 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
554 { "size", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
555 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
558 static const struct gdb_xml_attribute enum_attributes
[] = {
559 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
560 { "size", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
561 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
564 static const struct gdb_xml_attribute vector_attributes
[] = {
565 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
566 { "type", GDB_XML_AF_NONE
, NULL
, NULL
},
567 { "count", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
568 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
571 static const struct gdb_xml_attribute feature_attributes
[] = {
572 { "name", GDB_XML_AF_NONE
, NULL
, NULL
},
573 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
576 static const struct gdb_xml_element feature_children
[] = {
577 { "reg", reg_attributes
, NULL
,
578 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
579 tdesc_start_reg
, NULL
},
580 { "struct", struct_union_attributes
, struct_union_children
,
581 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
582 tdesc_start_struct
, NULL
},
583 { "union", struct_union_attributes
, struct_union_children
,
584 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
585 tdesc_start_union
, NULL
},
586 { "flags", flags_attributes
, struct_union_children
,
587 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
588 tdesc_start_flags
, NULL
},
589 { "enum", enum_attributes
, enum_children
,
590 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
591 tdesc_start_enum
, NULL
},
592 { "vector", vector_attributes
, NULL
,
593 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
594 tdesc_start_vector
, NULL
},
595 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
598 static const struct gdb_xml_attribute target_attributes
[] = {
599 { "version", GDB_XML_AF_NONE
, NULL
, NULL
},
600 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
603 static const struct gdb_xml_element target_children
[] = {
604 { "architecture", NULL
, NULL
, GDB_XML_EF_OPTIONAL
,
605 NULL
, tdesc_end_arch
},
606 { "osabi", NULL
, NULL
, GDB_XML_EF_OPTIONAL
,
607 NULL
, tdesc_end_osabi
},
608 { "compatible", NULL
, NULL
, GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
609 NULL
, tdesc_end_compatible
},
610 { "feature", feature_attributes
, feature_children
,
611 GDB_XML_EF_OPTIONAL
| GDB_XML_EF_REPEATABLE
,
612 tdesc_start_feature
, NULL
},
613 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
616 static const struct gdb_xml_element tdesc_elements
[] = {
617 { "target", target_attributes
, target_children
, GDB_XML_EF_NONE
,
618 tdesc_start_target
, NULL
},
619 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
622 /* Parse DOCUMENT into a target description and return it. */
624 static struct target_desc
*
625 tdesc_parse_xml (const char *document
, xml_fetch_another fetcher
,
628 struct tdesc_parsing_data data
;
630 /* Expand all XInclude directives. */
631 std::string expanded_text
;
633 if (!xml_process_xincludes (expanded_text
,
634 _("target description"),
635 document
, fetcher
, fetcher_baton
, 0))
637 warning (_("Could not load XML target description; ignoring"));
641 /* Check for an exact match in the list of descriptions we have
642 previously parsed. */
643 const auto it
= xml_cache
.find (expanded_text
);
644 if (it
!= xml_cache
.end ())
647 memset (&data
, 0, sizeof (struct tdesc_parsing_data
));
648 data
.tdesc
= allocate_target_description ();
649 struct cleanup
*result_cleanup
650 = make_cleanup_free_target_description (data
.tdesc
);
652 if (gdb_xml_parse_quick (_("target description"), "gdb-target.dtd",
653 tdesc_elements
, expanded_text
.c_str (), &data
) == 0)
655 /* Parsed successfully. */
656 xml_cache
.emplace (std::move (expanded_text
), data
.tdesc
);
657 discard_cleanups (result_cleanup
);
662 warning (_("Could not load XML target description; ignoring"));
663 do_cleanups (result_cleanup
);
667 #endif /* HAVE_LIBEXPAT */
670 /* Read an XML target description from FILENAME. Parse it, and return
671 the parsed description. */
673 const struct target_desc
*
674 file_read_description_xml (const char *filename
)
676 gdb::unique_xmalloc_ptr
<char> tdesc_str
677 = xml_fetch_content_from_file (filename
, NULL
);
678 if (tdesc_str
== NULL
)
680 warning (_("Could not open \"%s\""), filename
);
684 return tdesc_parse_xml (tdesc_str
.get (), xml_fetch_content_from_file
,
685 (void *) ldirname (filename
).c_str ());
688 /* Read a string representation of available features from the target,
689 using TARGET_OBJECT_AVAILABLE_FEATURES. The returned string is
690 malloc allocated and NUL-terminated. NAME should be a non-NULL
691 string identifying the XML document we want; the top level document
692 is "target.xml". Other calls may be performed for the DTD or
695 static gdb::unique_xmalloc_ptr
<char>
696 fetch_available_features_from_target (const char *name
, void *baton_
)
698 struct target_ops
*ops
= (struct target_ops
*) baton_
;
700 /* Read this object as a string. This ensures that a NUL
701 terminator is added. */
702 return target_read_stralloc (ops
,
703 TARGET_OBJECT_AVAILABLE_FEATURES
,
708 /* Read an XML target description using OPS. Parse it, and return the
709 parsed description. */
711 const struct target_desc
*
712 target_read_description_xml (struct target_ops
*ops
)
714 gdb::unique_xmalloc_ptr
<char> tdesc_str
715 = fetch_available_features_from_target ("target.xml", ops
);
716 if (tdesc_str
== NULL
)
719 return tdesc_parse_xml (tdesc_str
.get (),
720 fetch_available_features_from_target
,
724 /* Fetches an XML target description using OPS, processing
725 includes, but not parsing it. Used to dump whole tdesc
726 as a single XML file. */
728 gdb::optional
<std::string
>
729 target_fetch_description_xml (struct target_ops
*ops
)
731 #if !defined(HAVE_LIBEXPAT)
732 static int have_warned
;
737 warning (_("Can not fetch XML target description; XML support was "
738 "disabled at compile time"));
743 struct target_desc
*tdesc
;
745 gdb::unique_xmalloc_ptr
<char>
746 tdesc_str
= fetch_available_features_from_target ("target.xml", ops
);
747 if (tdesc_str
== NULL
)
751 if (!xml_process_xincludes (output
,
752 _("target description"),
754 fetch_available_features_from_target
, ops
, 0))
756 warning (_("Could not load XML target description; ignoring"));