/* XML target description support for GDB.
- Copyright (C) 2006
- Free Software Foundation, Inc.
+ Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
Contributed by CodeSourcery.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "target.h"
#include "target-descriptions.h"
#include "xml-support.h"
#include "xml-tdesc.h"
+#include "osabi.h"
#include "filenames.h"
#else /* HAVE_LIBEXPAT */
+/* A record of every XML description we have parsed. We never discard
+ old descriptions, because we never discard gdbarches. As long as we
+ have a gdbarch referencing this description, we want to have a copy
+ of it here, so that if we parse the same XML document again we can
+ return the same "struct target_desc *"; if they are not singletons,
+ then we will create unnecessary duplicate gdbarches. See
+ gdbarch_list_lookup_by_info. */
+
+struct tdesc_xml_cache
+{
+ const char *xml_document;
+ struct target_desc *tdesc;
+};
+typedef struct tdesc_xml_cache tdesc_xml_cache_s;
+DEF_VEC_O(tdesc_xml_cache_s);
+
+static VEC(tdesc_xml_cache_s) *xml_cache;
+
/* Callback data for target description parsing. */
struct tdesc_parsing_data
{
/* The target description we are building. */
struct target_desc *tdesc;
+
+ /* The target feature we are currently parsing, or last parsed. */
+ struct tdesc_feature *current_feature;
+
+ /* The register number to use for the next register we see, if
+ it does not have its own. This starts at zero. */
+ int next_regnum;
+
+ /* The union we are currently parsing, or last parsed. */
+ struct tdesc_type *current_union;
};
/* Handle the end of an <architecture> element and its value. */
set_tdesc_architecture (data->tdesc, arch);
}
+/* Handle the end of an <osabi> element and its value. */
+
+static void
+tdesc_end_osabi (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, const char *body_text)
+{
+ struct tdesc_parsing_data *data = user_data;
+ enum gdb_osabi osabi;
+
+ osabi = osabi_from_tdesc_string (body_text);
+ if (osabi == GDB_OSABI_UNKNOWN)
+ warning (_("Target description specified unknown osabi \"%s\""),
+ body_text);
+ else
+ set_tdesc_osabi (data->tdesc, osabi);
+}
+
+/* Handle the end of a <compatible> element and its value. */
+
+static void
+tdesc_end_compatible (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, const char *body_text)
+{
+ struct tdesc_parsing_data *data = user_data;
+ const struct bfd_arch_info *arch;
+
+ arch = bfd_scan_arch (body_text);
+ tdesc_add_compatible (data->tdesc, arch);
+}
+
+/* Handle the start of a <target> element. */
+
+static void
+tdesc_start_target (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct tdesc_parsing_data *data = user_data;
+ char *version = VEC_index (gdb_xml_value_s, attributes, 0)->value;
+
+ if (strcmp (version, "1.0") != 0)
+ gdb_xml_error (parser,
+ _("Target description has unsupported version \"%s\""),
+ version);
+}
+
+/* Handle the start of a <feature> element. */
+
+static void
+tdesc_start_feature (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct tdesc_parsing_data *data = user_data;
+ char *name = VEC_index (gdb_xml_value_s, attributes, 0)->value;
+
+ data->current_feature = tdesc_create_feature (data->tdesc, name);
+}
+
+/* Handle the start of a <reg> element. Fill in the optional
+ attributes and attach it to the containing feature. */
+
+static void
+tdesc_start_reg (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct tdesc_parsing_data *data = user_data;
+ struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes);
+ int ix = 0, length;
+ char *name, *group, *type;
+ int bitsize, regnum, save_restore;
+
+ length = VEC_length (gdb_xml_value_s, attributes);
+
+ name = attrs[ix++].value;
+ bitsize = * (ULONGEST *) attrs[ix++].value;
+
+ if (ix < length && strcmp (attrs[ix].name, "regnum") == 0)
+ regnum = * (ULONGEST *) attrs[ix++].value;
+ else
+ regnum = data->next_regnum;
+
+ if (ix < length && strcmp (attrs[ix].name, "type") == 0)
+ type = attrs[ix++].value;
+ else
+ type = "int";
+
+ if (ix < length && strcmp (attrs[ix].name, "group") == 0)
+ group = attrs[ix++].value;
+ else
+ group = NULL;
+
+ if (ix < length && strcmp (attrs[ix].name, "save-restore") == 0)
+ save_restore = * (ULONGEST *) attrs[ix++].value;
+ else
+ save_restore = 1;
+
+ if (strcmp (type, "int") != 0
+ && strcmp (type, "float") != 0
+ && tdesc_named_type (data->current_feature, type) == NULL)
+ gdb_xml_error (parser, _("Register \"%s\" has unknown type \"%s\""),
+ name, type);
+
+ tdesc_create_reg (data->current_feature, name, regnum, save_restore, group,
+ bitsize, type);
+
+ data->next_regnum = regnum + 1;
+}
+
+/* Handle the start of a <union> element. Initialize the type and
+ record it with the current feature. */
+
+static void
+tdesc_start_union (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct tdesc_parsing_data *data = user_data;
+ char *id = VEC_index (gdb_xml_value_s, attributes, 0)->value;
+
+ data->current_union = tdesc_create_union (data->current_feature, id);
+}
+
+/* Handle the start of a <field> element. Attach the field to the
+ current union. */
+
+static void
+tdesc_start_field (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct tdesc_parsing_data *data = user_data;
+ struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes);
+ struct tdesc_type *field_type;
+ char *field_name, *field_type_id;
+
+ field_name = attrs[0].value;
+ field_type_id = attrs[1].value;
+
+ field_type = tdesc_named_type (data->current_feature, field_type_id);
+ if (field_type == NULL)
+ gdb_xml_error (parser, _("Union field \"%s\" references undefined "
+ "type \"%s\""),
+ field_name, field_type_id);
+
+ tdesc_add_field (data->current_union, field_name, field_type);
+}
+
+/* Handle the start of a <vector> element. Initialize the type and
+ record it with the current feature. */
+
+static void
+tdesc_start_vector (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct tdesc_parsing_data *data = user_data;
+ struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes);
+ struct tdesc_type *field_type;
+ char *id, *field_type_id;
+ int count;
+
+ id = attrs[0].value;
+ field_type_id = attrs[1].value;
+ count = * (ULONGEST *) attrs[2].value;
+
+ field_type = tdesc_named_type (data->current_feature, field_type_id);
+ if (field_type == NULL)
+ gdb_xml_error (parser, _("Vector \"%s\" references undefined type \"%s\""),
+ id, field_type_id);
+
+ tdesc_create_vector (data->current_feature, id, field_type, count);
+}
+
/* The elements and attributes of an XML target description. */
-const struct gdb_xml_element target_children[] = {
+static const struct gdb_xml_attribute field_attributes[] = {
+ { "name", GDB_XML_AF_NONE, NULL, NULL },
+ { "type", GDB_XML_AF_NONE, NULL, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_element union_children[] = {
+ { "field", field_attributes, NULL, GDB_XML_EF_REPEATABLE,
+ tdesc_start_field, NULL },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_attribute reg_attributes[] = {
+ { "name", GDB_XML_AF_NONE, NULL, NULL },
+ { "bitsize", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
+ { "regnum", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
+ { "type", GDB_XML_AF_OPTIONAL, NULL, NULL },
+ { "group", GDB_XML_AF_OPTIONAL, NULL, NULL },
+ { "save-restore", GDB_XML_AF_OPTIONAL,
+ gdb_xml_parse_attr_enum, gdb_xml_enums_boolean },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_attribute union_attributes[] = {
+ { "id", GDB_XML_AF_NONE, NULL, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_attribute vector_attributes[] = {
+ { "id", GDB_XML_AF_NONE, NULL, NULL },
+ { "type", GDB_XML_AF_NONE, NULL, NULL },
+ { "count", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_attribute feature_attributes[] = {
+ { "name", GDB_XML_AF_NONE, NULL, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_element feature_children[] = {
+ { "reg", reg_attributes, NULL,
+ GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
+ tdesc_start_reg, NULL },
+ { "union", union_attributes, union_children,
+ GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
+ tdesc_start_union, NULL },
+ { "vector", vector_attributes, NULL,
+ GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
+ tdesc_start_vector, NULL },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_attribute target_attributes[] = {
+ { "version", GDB_XML_AF_NONE, NULL, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_element target_children[] = {
{ "architecture", NULL, NULL, GDB_XML_EF_OPTIONAL,
NULL, tdesc_end_arch },
+ { "osabi", NULL, NULL, GDB_XML_EF_OPTIONAL,
+ NULL, tdesc_end_osabi },
+ { "compatible", NULL, NULL, GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
+ NULL, tdesc_end_compatible },
+ { "feature", feature_attributes, feature_children,
+ GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
+ tdesc_start_feature, NULL },
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};
-const struct gdb_xml_element tdesc_elements[] = {
- { "target", NULL, target_children, GDB_XML_EF_NONE,
- NULL, NULL },
+static const struct gdb_xml_element tdesc_elements[] = {
+ { "target", target_attributes, target_children, GDB_XML_EF_NONE,
+ tdesc_start_target, NULL },
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};
struct cleanup *back_to, *result_cleanup;
struct gdb_xml_parser *parser;
struct tdesc_parsing_data data;
+ struct tdesc_xml_cache *cache;
char *expanded_text;
+ int ix;
/* Expand all XInclude directives. */
expanded_text = xml_process_xincludes (_("target description"),
warning (_("Could not load XML target description; ignoring"));
return NULL;
}
- back_to = make_cleanup (xfree, expanded_text);
+ /* Check for an exact match in the list of descriptions we have
+ previously parsed. strcmp is a slightly inefficient way to
+ do this; an SHA-1 checksum would work as well. */
+ for (ix = 0; VEC_iterate (tdesc_xml_cache_s, xml_cache, ix, cache); ix++)
+ if (strcmp (cache->xml_document, expanded_text) == 0)
+ {
+ xfree (expanded_text);
+ return cache->tdesc;
+ }
+
+ back_to = make_cleanup (null_cleanup, NULL);
parser = gdb_xml_create_parser_and_cleanup (_("target description"),
tdesc_elements, &data);
gdb_xml_use_dtd (parser, "gdb-target.dtd");
memset (&data, 0, sizeof (struct tdesc_parsing_data));
data.tdesc = allocate_target_description ();
result_cleanup = make_cleanup_free_target_description (data.tdesc);
+ make_cleanup (xfree, expanded_text);
if (gdb_xml_parse (parser, expanded_text) == 0)
{
/* Parsed successfully. */
+ struct tdesc_xml_cache new_cache;
+
+ new_cache.xml_document = expanded_text;
+ new_cache.tdesc = data.tdesc;
+ VEC_safe_push (tdesc_xml_cache_s, xml_cache, &new_cache);
discard_cleanups (result_cleanup);
do_cleanups (back_to);
return data.tdesc;
#endif /* HAVE_LIBEXPAT */
\f
-/* Close FILE. */
-
-static void
-do_cleanup_fclose (void *file)
-{
- fclose (file);
-}
-
/* Open FILENAME, read all its text into memory, close it, and return
the text. If something goes wrong, return NULL and warn. */
if (dirname && *dirname)
{
- char *fullname = concat (dirname, "/", filename, NULL);
+ char *fullname = concat (dirname, "/", filename, (char *) NULL);
if (fullname == NULL)
nomem (0);
file = fopen (fullname, FOPEN_RT);
if (file == NULL)
return NULL;
- back_to = make_cleanup (do_cleanup_fclose, file);
+ back_to = make_cleanup_fclose (file);
/* Read in the whole file, one chunk at a time. */
len = 4096;
struct target_desc *tdesc;
char *tdesc_str;
struct cleanup *back_to;
- const char *base;
char *dirname;
tdesc_str = fetch_xml_from_file (filename, NULL);
back_to = make_cleanup (xfree, tdesc_str);
- /* Simple, portable version of dirname that does not modify its
- argument. */
- base = lbasename (filename);
- while (base > filename && IS_DIR_SEPARATOR (base[-1]))
- --base;
- if (base > filename)
- {
- dirname = xmalloc (base - filename + 2);
- memcpy (dirname, filename, base - filename);
-
- /* On DOS based file systems, convert "d:foo" to "d:.", so that
- we create "d:./bar" later instead of the (different)
- "d:/bar". */
- if (base - filename == 2 && IS_ABSOLUTE_PATH (base)
- && !IS_DIR_SEPARATOR (filename[0]))
- dirname[base++ - filename] = '.';
-
- dirname[base - filename] = '\0';
- make_cleanup (xfree, dirname);
- }
- else
- dirname = NULL;
+ dirname = ldirname (filename);
+ if (dirname != NULL)
+ make_cleanup (xfree, dirname);
tdesc = tdesc_parse_xml (tdesc_str, fetch_xml_from_file, dirname);
do_cleanups (back_to);
projects / deliverable / binutils-gdb.git / blobdiff