| 1 | /* XML target description support for GDB. |
| 2 | |
| 3 | Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc. |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "target.h" |
| 24 | #include "target-descriptions.h" |
| 25 | #include "xml-support.h" |
| 26 | #include "xml-tdesc.h" |
| 27 | #include "osabi.h" |
| 28 | |
| 29 | #include "filenames.h" |
| 30 | |
| 31 | #include "gdb_assert.h" |
| 32 | |
| 33 | #if !defined(HAVE_LIBEXPAT) |
| 34 | |
| 35 | /* Parse DOCUMENT into a target description. Or don't, since we don't have |
| 36 | an XML parser. */ |
| 37 | |
| 38 | static struct target_desc * |
| 39 | tdesc_parse_xml (const char *document, xml_fetch_another fetcher, |
| 40 | void *fetcher_baton) |
| 41 | { |
| 42 | static int have_warned; |
| 43 | |
| 44 | if (!have_warned) |
| 45 | { |
| 46 | have_warned = 1; |
| 47 | warning (_("Can not parse XML target description; XML support was " |
| 48 | "disabled at compile time")); |
| 49 | } |
| 50 | |
| 51 | return NULL; |
| 52 | } |
| 53 | |
| 54 | #else /* HAVE_LIBEXPAT */ |
| 55 | |
| 56 | /* A record of every XML description we have parsed. We never discard |
| 57 | old descriptions, because we never discard gdbarches. As long as we |
| 58 | have a gdbarch referencing this description, we want to have a copy |
| 59 | of it here, so that if we parse the same XML document again we can |
| 60 | return the same "struct target_desc *"; if they are not singletons, |
| 61 | then we will create unnecessary duplicate gdbarches. See |
| 62 | gdbarch_list_lookup_by_info. */ |
| 63 | |
| 64 | struct tdesc_xml_cache |
| 65 | { |
| 66 | const char *xml_document; |
| 67 | struct target_desc *tdesc; |
| 68 | }; |
| 69 | typedef struct tdesc_xml_cache tdesc_xml_cache_s; |
| 70 | DEF_VEC_O(tdesc_xml_cache_s); |
| 71 | |
| 72 | static VEC(tdesc_xml_cache_s) *xml_cache; |
| 73 | |
| 74 | /* Callback data for target description parsing. */ |
| 75 | |
| 76 | struct tdesc_parsing_data |
| 77 | { |
| 78 | /* The target description we are building. */ |
| 79 | struct target_desc *tdesc; |
| 80 | |
| 81 | /* The target feature we are currently parsing, or last parsed. */ |
| 82 | struct tdesc_feature *current_feature; |
| 83 | |
| 84 | /* The register number to use for the next register we see, if |
| 85 | it does not have its own. This starts at zero. */ |
| 86 | int next_regnum; |
| 87 | |
| 88 | /* The union we are currently parsing, or last parsed. */ |
| 89 | struct tdesc_type *current_union; |
| 90 | }; |
| 91 | |
| 92 | /* Handle the end of an <architecture> element and its value. */ |
| 93 | |
| 94 | static void |
| 95 | tdesc_end_arch (struct gdb_xml_parser *parser, |
| 96 | const struct gdb_xml_element *element, |
| 97 | void *user_data, const char *body_text) |
| 98 | { |
| 99 | struct tdesc_parsing_data *data = user_data; |
| 100 | const struct bfd_arch_info *arch; |
| 101 | |
| 102 | arch = bfd_scan_arch (body_text); |
| 103 | if (arch == NULL) |
| 104 | gdb_xml_error (parser, _("Target description specified unknown " |
| 105 | "architecture \"%s\""), body_text); |
| 106 | set_tdesc_architecture (data->tdesc, arch); |
| 107 | } |
| 108 | |
| 109 | /* Handle the end of an <osabi> element and its value. */ |
| 110 | |
| 111 | static void |
| 112 | tdesc_end_osabi (struct gdb_xml_parser *parser, |
| 113 | const struct gdb_xml_element *element, |
| 114 | void *user_data, const char *body_text) |
| 115 | { |
| 116 | struct tdesc_parsing_data *data = user_data; |
| 117 | enum gdb_osabi osabi; |
| 118 | |
| 119 | osabi = osabi_from_tdesc_string (body_text); |
| 120 | if (osabi == GDB_OSABI_UNKNOWN) |
| 121 | warning (_("Target description specified unknown osabi \"%s\""), |
| 122 | body_text); |
| 123 | else |
| 124 | set_tdesc_osabi (data->tdesc, osabi); |
| 125 | } |
| 126 | |
| 127 | /* Handle the end of a <compatible> element and its value. */ |
| 128 | |
| 129 | static void |
| 130 | tdesc_end_compatible (struct gdb_xml_parser *parser, |
| 131 | const struct gdb_xml_element *element, |
| 132 | void *user_data, const char *body_text) |
| 133 | { |
| 134 | struct tdesc_parsing_data *data = user_data; |
| 135 | const struct bfd_arch_info *arch; |
| 136 | |
| 137 | arch = bfd_scan_arch (body_text); |
| 138 | tdesc_add_compatible (data->tdesc, arch); |
| 139 | } |
| 140 | |
| 141 | /* Handle the start of a <target> element. */ |
| 142 | |
| 143 | static void |
| 144 | tdesc_start_target (struct gdb_xml_parser *parser, |
| 145 | const struct gdb_xml_element *element, |
| 146 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 147 | { |
| 148 | struct tdesc_parsing_data *data = user_data; |
| 149 | char *version = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 150 | |
| 151 | if (strcmp (version, "1.0") != 0) |
| 152 | gdb_xml_error (parser, |
| 153 | _("Target description has unsupported version \"%s\""), |
| 154 | version); |
| 155 | } |
| 156 | |
| 157 | /* Handle the start of a <feature> element. */ |
| 158 | |
| 159 | static void |
| 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) |
| 163 | { |
| 164 | struct tdesc_parsing_data *data = user_data; |
| 165 | char *name = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 166 | |
| 167 | data->current_feature = tdesc_create_feature (data->tdesc, name); |
| 168 | } |
| 169 | |
| 170 | /* Handle the start of a <reg> element. Fill in the optional |
| 171 | attributes and attach it to the containing feature. */ |
| 172 | |
| 173 | static void |
| 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) |
| 177 | { |
| 178 | struct tdesc_parsing_data *data = user_data; |
| 179 | struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes); |
| 180 | int ix = 0, length; |
| 181 | char *name, *group, *type; |
| 182 | int bitsize, regnum, save_restore; |
| 183 | |
| 184 | length = VEC_length (gdb_xml_value_s, attributes); |
| 185 | |
| 186 | name = attrs[ix++].value; |
| 187 | bitsize = * (ULONGEST *) attrs[ix++].value; |
| 188 | |
| 189 | if (ix < length && strcmp (attrs[ix].name, "regnum") == 0) |
| 190 | regnum = * (ULONGEST *) attrs[ix++].value; |
| 191 | else |
| 192 | regnum = data->next_regnum; |
| 193 | |
| 194 | if (ix < length && strcmp (attrs[ix].name, "type") == 0) |
| 195 | type = attrs[ix++].value; |
| 196 | else |
| 197 | type = "int"; |
| 198 | |
| 199 | if (ix < length && strcmp (attrs[ix].name, "group") == 0) |
| 200 | group = attrs[ix++].value; |
| 201 | else |
| 202 | group = NULL; |
| 203 | |
| 204 | if (ix < length && strcmp (attrs[ix].name, "save-restore") == 0) |
| 205 | save_restore = * (ULONGEST *) attrs[ix++].value; |
| 206 | else |
| 207 | save_restore = 1; |
| 208 | |
| 209 | if (strcmp (type, "int") != 0 |
| 210 | && strcmp (type, "float") != 0 |
| 211 | && tdesc_named_type (data->current_feature, type) == NULL) |
| 212 | gdb_xml_error (parser, _("Register \"%s\" has unknown type \"%s\""), |
| 213 | name, type); |
| 214 | |
| 215 | tdesc_create_reg (data->current_feature, name, regnum, save_restore, group, |
| 216 | bitsize, type); |
| 217 | |
| 218 | data->next_regnum = regnum + 1; |
| 219 | } |
| 220 | |
| 221 | /* Handle the start of a <union> element. Initialize the type and |
| 222 | record it with the current feature. */ |
| 223 | |
| 224 | static void |
| 225 | tdesc_start_union (struct gdb_xml_parser *parser, |
| 226 | const struct gdb_xml_element *element, |
| 227 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 228 | { |
| 229 | struct tdesc_parsing_data *data = user_data; |
| 230 | char *id = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 231 | |
| 232 | data->current_union = tdesc_create_union (data->current_feature, id); |
| 233 | } |
| 234 | |
| 235 | /* Handle the start of a <field> element. Attach the field to the |
| 236 | current union. */ |
| 237 | |
| 238 | static void |
| 239 | tdesc_start_field (struct gdb_xml_parser *parser, |
| 240 | const struct gdb_xml_element *element, |
| 241 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 242 | { |
| 243 | struct tdesc_parsing_data *data = user_data; |
| 244 | struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes); |
| 245 | struct tdesc_type *field_type; |
| 246 | char *field_name, *field_type_id; |
| 247 | |
| 248 | field_name = attrs[0].value; |
| 249 | field_type_id = attrs[1].value; |
| 250 | |
| 251 | field_type = tdesc_named_type (data->current_feature, field_type_id); |
| 252 | if (field_type == NULL) |
| 253 | gdb_xml_error (parser, _("Union field \"%s\" references undefined " |
| 254 | "type \"%s\""), |
| 255 | field_name, field_type_id); |
| 256 | |
| 257 | tdesc_add_field (data->current_union, field_name, field_type); |
| 258 | } |
| 259 | |
| 260 | /* Handle the start of a <vector> element. Initialize the type and |
| 261 | record it with the current feature. */ |
| 262 | |
| 263 | static void |
| 264 | tdesc_start_vector (struct gdb_xml_parser *parser, |
| 265 | const struct gdb_xml_element *element, |
| 266 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 267 | { |
| 268 | struct tdesc_parsing_data *data = user_data; |
| 269 | struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes); |
| 270 | struct tdesc_type *field_type; |
| 271 | char *id, *field_type_id; |
| 272 | int count; |
| 273 | |
| 274 | id = attrs[0].value; |
| 275 | field_type_id = attrs[1].value; |
| 276 | count = * (ULONGEST *) attrs[2].value; |
| 277 | |
| 278 | field_type = tdesc_named_type (data->current_feature, field_type_id); |
| 279 | if (field_type == NULL) |
| 280 | gdb_xml_error (parser, _("Vector \"%s\" references undefined type \"%s\""), |
| 281 | id, field_type_id); |
| 282 | |
| 283 | tdesc_create_vector (data->current_feature, id, field_type, count); |
| 284 | } |
| 285 | |
| 286 | /* The elements and attributes of an XML target description. */ |
| 287 | |
| 288 | static const struct gdb_xml_attribute field_attributes[] = { |
| 289 | { "name", GDB_XML_AF_NONE, NULL, NULL }, |
| 290 | { "type", GDB_XML_AF_NONE, NULL, NULL }, |
| 291 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 292 | }; |
| 293 | |
| 294 | static const struct gdb_xml_element union_children[] = { |
| 295 | { "field", field_attributes, NULL, GDB_XML_EF_REPEATABLE, |
| 296 | tdesc_start_field, NULL }, |
| 297 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 298 | }; |
| 299 | |
| 300 | static const struct gdb_xml_attribute reg_attributes[] = { |
| 301 | { "name", GDB_XML_AF_NONE, NULL, NULL }, |
| 302 | { "bitsize", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| 303 | { "regnum", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL }, |
| 304 | { "type", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
| 305 | { "group", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
| 306 | { "save-restore", GDB_XML_AF_OPTIONAL, |
| 307 | gdb_xml_parse_attr_enum, gdb_xml_enums_boolean }, |
| 308 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 309 | }; |
| 310 | |
| 311 | static const struct gdb_xml_attribute union_attributes[] = { |
| 312 | { "id", GDB_XML_AF_NONE, NULL, NULL }, |
| 313 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 314 | }; |
| 315 | |
| 316 | static const struct gdb_xml_attribute vector_attributes[] = { |
| 317 | { "id", GDB_XML_AF_NONE, NULL, NULL }, |
| 318 | { "type", GDB_XML_AF_NONE, NULL, NULL }, |
| 319 | { "count", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| 320 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 321 | }; |
| 322 | |
| 323 | static const struct gdb_xml_attribute feature_attributes[] = { |
| 324 | { "name", GDB_XML_AF_NONE, NULL, NULL }, |
| 325 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 326 | }; |
| 327 | |
| 328 | static const struct gdb_xml_element feature_children[] = { |
| 329 | { "reg", reg_attributes, NULL, |
| 330 | GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE, |
| 331 | tdesc_start_reg, NULL }, |
| 332 | { "union", union_attributes, union_children, |
| 333 | GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE, |
| 334 | tdesc_start_union, NULL }, |
| 335 | { "vector", vector_attributes, NULL, |
| 336 | GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE, |
| 337 | tdesc_start_vector, NULL }, |
| 338 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 339 | }; |
| 340 | |
| 341 | static const struct gdb_xml_attribute target_attributes[] = { |
| 342 | { "version", GDB_XML_AF_NONE, NULL, NULL }, |
| 343 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 344 | }; |
| 345 | |
| 346 | static const struct gdb_xml_element target_children[] = { |
| 347 | { "architecture", NULL, NULL, GDB_XML_EF_OPTIONAL, |
| 348 | NULL, tdesc_end_arch }, |
| 349 | { "osabi", NULL, NULL, GDB_XML_EF_OPTIONAL, |
| 350 | NULL, tdesc_end_osabi }, |
| 351 | { "compatible", NULL, NULL, GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE, |
| 352 | NULL, tdesc_end_compatible }, |
| 353 | { "feature", feature_attributes, feature_children, |
| 354 | GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE, |
| 355 | tdesc_start_feature, NULL }, |
| 356 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 357 | }; |
| 358 | |
| 359 | static const struct gdb_xml_element tdesc_elements[] = { |
| 360 | { "target", target_attributes, target_children, GDB_XML_EF_NONE, |
| 361 | tdesc_start_target, NULL }, |
| 362 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 363 | }; |
| 364 | |
| 365 | /* Parse DOCUMENT into a target description and return it. */ |
| 366 | |
| 367 | static struct target_desc * |
| 368 | tdesc_parse_xml (const char *document, xml_fetch_another fetcher, |
| 369 | void *fetcher_baton) |
| 370 | { |
| 371 | struct cleanup *back_to, *result_cleanup; |
| 372 | struct gdb_xml_parser *parser; |
| 373 | struct tdesc_parsing_data data; |
| 374 | struct tdesc_xml_cache *cache; |
| 375 | char *expanded_text; |
| 376 | int ix; |
| 377 | |
| 378 | /* Expand all XInclude directives. */ |
| 379 | expanded_text = xml_process_xincludes (_("target description"), |
| 380 | document, fetcher, fetcher_baton, 0); |
| 381 | if (expanded_text == NULL) |
| 382 | { |
| 383 | warning (_("Could not load XML target description; ignoring")); |
| 384 | return NULL; |
| 385 | } |
| 386 | |
| 387 | /* Check for an exact match in the list of descriptions we have |
| 388 | previously parsed. strcmp is a slightly inefficient way to |
| 389 | do this; an SHA-1 checksum would work as well. */ |
| 390 | for (ix = 0; VEC_iterate (tdesc_xml_cache_s, xml_cache, ix, cache); ix++) |
| 391 | if (strcmp (cache->xml_document, expanded_text) == 0) |
| 392 | { |
| 393 | xfree (expanded_text); |
| 394 | return cache->tdesc; |
| 395 | } |
| 396 | |
| 397 | back_to = make_cleanup (null_cleanup, NULL); |
| 398 | parser = gdb_xml_create_parser_and_cleanup (_("target description"), |
| 399 | tdesc_elements, &data); |
| 400 | gdb_xml_use_dtd (parser, "gdb-target.dtd"); |
| 401 | |
| 402 | memset (&data, 0, sizeof (struct tdesc_parsing_data)); |
| 403 | data.tdesc = allocate_target_description (); |
| 404 | result_cleanup = make_cleanup_free_target_description (data.tdesc); |
| 405 | make_cleanup (xfree, expanded_text); |
| 406 | |
| 407 | if (gdb_xml_parse (parser, expanded_text) == 0) |
| 408 | { |
| 409 | /* Parsed successfully. */ |
| 410 | struct tdesc_xml_cache new_cache; |
| 411 | |
| 412 | new_cache.xml_document = expanded_text; |
| 413 | new_cache.tdesc = data.tdesc; |
| 414 | VEC_safe_push (tdesc_xml_cache_s, xml_cache, &new_cache); |
| 415 | discard_cleanups (result_cleanup); |
| 416 | do_cleanups (back_to); |
| 417 | return data.tdesc; |
| 418 | } |
| 419 | else |
| 420 | { |
| 421 | warning (_("Could not load XML target description; ignoring")); |
| 422 | do_cleanups (back_to); |
| 423 | return NULL; |
| 424 | } |
| 425 | } |
| 426 | #endif /* HAVE_LIBEXPAT */ |
| 427 | \f |
| 428 | |
| 429 | /* Open FILENAME, read all its text into memory, close it, and return |
| 430 | the text. If something goes wrong, return NULL and warn. */ |
| 431 | |
| 432 | static char * |
| 433 | fetch_xml_from_file (const char *filename, void *baton) |
| 434 | { |
| 435 | const char *dirname = baton; |
| 436 | FILE *file; |
| 437 | struct cleanup *back_to; |
| 438 | char *text; |
| 439 | size_t len, offset; |
| 440 | |
| 441 | if (dirname && *dirname) |
| 442 | { |
| 443 | char *fullname = concat (dirname, "/", filename, (char *) NULL); |
| 444 | if (fullname == NULL) |
| 445 | nomem (0); |
| 446 | file = fopen (fullname, FOPEN_RT); |
| 447 | xfree (fullname); |
| 448 | } |
| 449 | else |
| 450 | file = fopen (filename, FOPEN_RT); |
| 451 | |
| 452 | if (file == NULL) |
| 453 | return NULL; |
| 454 | |
| 455 | back_to = make_cleanup_fclose (file); |
| 456 | |
| 457 | /* Read in the whole file, one chunk at a time. */ |
| 458 | len = 4096; |
| 459 | offset = 0; |
| 460 | text = xmalloc (len); |
| 461 | make_cleanup (free_current_contents, &text); |
| 462 | while (1) |
| 463 | { |
| 464 | size_t bytes_read; |
| 465 | |
| 466 | /* Continue reading where the last read left off. Leave at least |
| 467 | one byte so that we can NUL-terminate the result. */ |
| 468 | bytes_read = fread (text + offset, 1, len - offset - 1, file); |
| 469 | if (ferror (file)) |
| 470 | { |
| 471 | warning (_("Read error from \"%s\""), filename); |
| 472 | do_cleanups (back_to); |
| 473 | return NULL; |
| 474 | } |
| 475 | |
| 476 | offset += bytes_read; |
| 477 | |
| 478 | if (feof (file)) |
| 479 | break; |
| 480 | |
| 481 | len = len * 2; |
| 482 | text = xrealloc (text, len); |
| 483 | } |
| 484 | |
| 485 | fclose (file); |
| 486 | discard_cleanups (back_to); |
| 487 | |
| 488 | text[offset] = '\0'; |
| 489 | return text; |
| 490 | } |
| 491 | |
| 492 | /* Read an XML target description from FILENAME. Parse it, and return |
| 493 | the parsed description. */ |
| 494 | |
| 495 | const struct target_desc * |
| 496 | file_read_description_xml (const char *filename) |
| 497 | { |
| 498 | struct target_desc *tdesc; |
| 499 | char *tdesc_str; |
| 500 | struct cleanup *back_to; |
| 501 | char *dirname; |
| 502 | |
| 503 | tdesc_str = fetch_xml_from_file (filename, NULL); |
| 504 | if (tdesc_str == NULL) |
| 505 | { |
| 506 | warning (_("Could not open \"%s\""), filename); |
| 507 | return NULL; |
| 508 | } |
| 509 | |
| 510 | back_to = make_cleanup (xfree, tdesc_str); |
| 511 | |
| 512 | dirname = ldirname (filename); |
| 513 | if (dirname != NULL) |
| 514 | make_cleanup (xfree, dirname); |
| 515 | |
| 516 | tdesc = tdesc_parse_xml (tdesc_str, fetch_xml_from_file, dirname); |
| 517 | do_cleanups (back_to); |
| 518 | |
| 519 | return tdesc; |
| 520 | } |
| 521 | |
| 522 | /* Read a string representation of available features from the target, |
| 523 | using TARGET_OBJECT_AVAILABLE_FEATURES. The returned string is |
| 524 | malloc allocated and NUL-terminated. NAME should be a non-NULL |
| 525 | string identifying the XML document we want; the top level document |
| 526 | is "target.xml". Other calls may be performed for the DTD or |
| 527 | for <xi:include>. */ |
| 528 | |
| 529 | static char * |
| 530 | fetch_available_features_from_target (const char *name, void *baton_) |
| 531 | { |
| 532 | struct target_ops *ops = baton_; |
| 533 | |
| 534 | /* Read this object as a string. This ensures that a NUL |
| 535 | terminator is added. */ |
| 536 | return target_read_stralloc (ops, |
| 537 | TARGET_OBJECT_AVAILABLE_FEATURES, |
| 538 | name); |
| 539 | } |
| 540 | \f |
| 541 | |
| 542 | /* Read an XML target description using OPS. Parse it, and return the |
| 543 | parsed description. */ |
| 544 | |
| 545 | const struct target_desc * |
| 546 | target_read_description_xml (struct target_ops *ops) |
| 547 | { |
| 548 | struct target_desc *tdesc; |
| 549 | char *tdesc_str; |
| 550 | struct cleanup *back_to; |
| 551 | |
| 552 | tdesc_str = fetch_available_features_from_target ("target.xml", ops); |
| 553 | if (tdesc_str == NULL) |
| 554 | return NULL; |
| 555 | |
| 556 | back_to = make_cleanup (xfree, tdesc_str); |
| 557 | tdesc = tdesc_parse_xml (tdesc_str, |
| 558 | fetch_available_features_from_target, |
| 559 | ops); |
| 560 | do_cleanups (back_to); |
| 561 | |
| 562 | return tdesc; |
| 563 | } |