756 lines
23 KiB
C
756 lines
23 KiB
C
/* XML target description support for GDB.
|
||
|
||
Copyright (C) 2006-2018 Free Software Foundation, Inc.
|
||
|
||
Contributed by CodeSourcery.
|
||
|
||
This file is part of GDB.
|
||
|
||
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 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
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, 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"
|
||
#include <unordered_map>
|
||
#include <string>
|
||
|
||
/* Maximum sizes.
|
||
This is just to catch obviously wrong values. */
|
||
#define MAX_FIELD_SIZE 65536
|
||
#define MAX_FIELD_BITSIZE (MAX_FIELD_SIZE * TARGET_CHAR_BIT)
|
||
#define MAX_VECTOR_SIZE 65536
|
||
|
||
#if !defined(HAVE_LIBEXPAT)
|
||
|
||
/* Parse DOCUMENT into a target description. Or don't, since we don't have
|
||
an XML parser. */
|
||
|
||
static struct target_desc *
|
||
tdesc_parse_xml (const char *document, xml_fetch_another fetcher,
|
||
void *fetcher_baton)
|
||
{
|
||
static int have_warned;
|
||
|
||
if (!have_warned)
|
||
{
|
||
have_warned = 1;
|
||
warning (_("Can not parse XML target description; XML support was "
|
||
"disabled at compile time"));
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
#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. */
|
||
|
||
static std::unordered_map<std::string, target_desc *> 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 struct or union we are currently parsing, or last parsed. */
|
||
tdesc_type_with_fields *current_type;
|
||
|
||
/* The byte size of the current struct/flags type, if specified. Zero
|
||
if not specified. Flags values must specify a size. */
|
||
int current_type_size;
|
||
};
|
||
|
||
/* Handle the end of an <architecture> element and its value. */
|
||
|
||
static void
|
||
tdesc_end_arch (struct gdb_xml_parser *parser,
|
||
const struct gdb_xml_element *element,
|
||
void *user_data, const char *body_text)
|
||
{
|
||
struct tdesc_parsing_data *data = (struct tdesc_parsing_data *) user_data;
|
||
const struct bfd_arch_info *arch;
|
||
|
||
arch = bfd_scan_arch (body_text);
|
||
if (arch == NULL)
|
||
gdb_xml_error (parser, _("Target description specified unknown "
|
||
"architecture \"%s\""), body_text);
|
||
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 = (struct tdesc_parsing_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 = (struct tdesc_parsing_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)
|
||
{
|
||
char *version = (char *) xml_find_attribute (attributes, "version")->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 = (struct tdesc_parsing_data *) user_data;
|
||
char *name = (char *) xml_find_attribute (attributes, "name")->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 = (struct tdesc_parsing_data *) user_data;
|
||
struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes);
|
||
int ix = 0, length;
|
||
char *name, *group;
|
||
const char *type;
|
||
int bitsize, regnum, save_restore;
|
||
|
||
length = VEC_length (gdb_xml_value_s, attributes);
|
||
|
||
name = (char *) 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 = (char *) attrs[ix++].value;
|
||
else
|
||
type = "int";
|
||
|
||
if (ix < length && strcmp (attrs[ix].name, "group") == 0)
|
||
group = (char *) 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 = (struct tdesc_parsing_data *) user_data;
|
||
char *id = (char *) xml_find_attribute (attributes, "id")->value;
|
||
|
||
data->current_type = tdesc_create_union (data->current_feature, id);
|
||
data->current_type_size = 0;
|
||
}
|
||
|
||
/* Handle the start of a <struct> element. Initialize the type and
|
||
record it with the current feature. */
|
||
|
||
static void
|
||
tdesc_start_struct (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 = (struct tdesc_parsing_data *) user_data;
|
||
char *id = (char *) xml_find_attribute (attributes, "id")->value;
|
||
struct gdb_xml_value *attr;
|
||
|
||
tdesc_type_with_fields *type_with_fields
|
||
= tdesc_create_struct (data->current_feature, id);
|
||
data->current_type = type_with_fields;
|
||
data->current_type_size = 0;
|
||
|
||
attr = xml_find_attribute (attributes, "size");
|
||
if (attr != NULL)
|
||
{
|
||
ULONGEST size = * (ULONGEST *) attr->value;
|
||
|
||
if (size > MAX_FIELD_SIZE)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Struct size %s is larger than maximum (%d)"),
|
||
pulongest (size), MAX_FIELD_SIZE);
|
||
}
|
||
tdesc_set_struct_size (type_with_fields, size);
|
||
data->current_type_size = size;
|
||
}
|
||
}
|
||
|
||
static void
|
||
tdesc_start_flags (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 = (struct tdesc_parsing_data *) user_data;
|
||
char *id = (char *) xml_find_attribute (attributes, "id")->value;
|
||
ULONGEST size = * (ULONGEST *)
|
||
xml_find_attribute (attributes, "size")->value;
|
||
|
||
if (size > MAX_FIELD_SIZE)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Flags size %s is larger than maximum (%d)"),
|
||
pulongest (size), MAX_FIELD_SIZE);
|
||
}
|
||
|
||
data->current_type = tdesc_create_flags (data->current_feature, id, size);
|
||
data->current_type_size = size;
|
||
}
|
||
|
||
static void
|
||
tdesc_start_enum (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 = (struct tdesc_parsing_data *) user_data;
|
||
char *id = (char *) xml_find_attribute (attributes, "id")->value;
|
||
int size = * (ULONGEST *)
|
||
xml_find_attribute (attributes, "size")->value;
|
||
|
||
if (size > MAX_FIELD_SIZE)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Enum size %s is larger than maximum (%d)"),
|
||
pulongest (size), MAX_FIELD_SIZE);
|
||
}
|
||
|
||
data->current_type = tdesc_create_enum (data->current_feature, id, size);
|
||
data->current_type_size = 0;
|
||
}
|
||
|
||
/* Handle the start of a <field> element. Attach the field to the
|
||
current struct, union or flags. */
|
||
|
||
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 = (struct tdesc_parsing_data *) user_data;
|
||
struct gdb_xml_value *attr;
|
||
struct tdesc_type *field_type;
|
||
char *field_name, *field_type_id;
|
||
int start, end;
|
||
|
||
field_name = (char *) xml_find_attribute (attributes, "name")->value;
|
||
|
||
attr = xml_find_attribute (attributes, "type");
|
||
if (attr != NULL)
|
||
{
|
||
field_type_id = (char *) attr->value;
|
||
field_type = tdesc_named_type (data->current_feature, field_type_id);
|
||
}
|
||
else
|
||
{
|
||
field_type_id = NULL;
|
||
field_type = NULL;
|
||
}
|
||
|
||
attr = xml_find_attribute (attributes, "start");
|
||
if (attr != NULL)
|
||
{
|
||
ULONGEST ul_start = * (ULONGEST *) attr->value;
|
||
|
||
if (ul_start > MAX_FIELD_BITSIZE)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Field start %s is larger than maximum (%d)"),
|
||
pulongest (ul_start), MAX_FIELD_BITSIZE);
|
||
}
|
||
start = ul_start;
|
||
}
|
||
else
|
||
start = -1;
|
||
|
||
attr = xml_find_attribute (attributes, "end");
|
||
if (attr != NULL)
|
||
{
|
||
ULONGEST ul_end = * (ULONGEST *) attr->value;
|
||
|
||
if (ul_end > MAX_FIELD_BITSIZE)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Field end %s is larger than maximum (%d)"),
|
||
pulongest (ul_end), MAX_FIELD_BITSIZE);
|
||
}
|
||
end = ul_end;
|
||
}
|
||
else
|
||
end = -1;
|
||
|
||
if (start != -1)
|
||
{
|
||
tdesc_type_with_fields *t = data->current_type;
|
||
|
||
/* Older versions of gdb can't handle elided end values.
|
||
Stick with that for now, to help ensure backward compatibility.
|
||
E.g., If a newer gdbserver is talking to an older gdb. */
|
||
if (end == -1)
|
||
gdb_xml_error (parser, _("Missing end value"));
|
||
|
||
if (data->current_type_size == 0)
|
||
gdb_xml_error (parser,
|
||
_("Bitfields must live in explicitly sized types"));
|
||
|
||
if (field_type_id != NULL
|
||
&& strcmp (field_type_id, "bool") == 0
|
||
&& start != end)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Boolean fields must be one bit in size"));
|
||
}
|
||
|
||
if (end >= 64)
|
||
gdb_xml_error (parser,
|
||
_("Bitfield \"%s\" goes past "
|
||
"64 bits (unsupported)"),
|
||
field_name);
|
||
|
||
/* Assume that the bit numbering in XML is "lsb-zero". Most
|
||
architectures other than PowerPC use this ordering. In the
|
||
future, we can add an XML tag to indicate "msb-zero" numbering. */
|
||
if (start > end)
|
||
gdb_xml_error (parser, _("Bitfield \"%s\" has start after end"),
|
||
field_name);
|
||
if (end >= data->current_type_size * TARGET_CHAR_BIT)
|
||
gdb_xml_error (parser, _("Bitfield \"%s\" does not fit in struct"),
|
||
field_name);
|
||
|
||
if (field_type != NULL)
|
||
tdesc_add_typed_bitfield (t, field_name, start, end, field_type);
|
||
else if (start == end)
|
||
tdesc_add_flag (t, start, field_name);
|
||
else
|
||
tdesc_add_bitfield (t, field_name, start, end);
|
||
}
|
||
else if (start == -1 && end != -1)
|
||
gdb_xml_error (parser, _("End specified but not start"));
|
||
else if (field_type_id != NULL)
|
||
{
|
||
/* TDESC_TYPE_FLAGS values are explicitly sized, so the following test
|
||
catches adding non-bitfield types to flags as well. */
|
||
if (data->current_type_size != 0)
|
||
gdb_xml_error (parser,
|
||
_("Explicitly sized type cannot "
|
||
"contain non-bitfield \"%s\""),
|
||
field_name);
|
||
|
||
if (field_type == NULL)
|
||
gdb_xml_error (parser, _("Field \"%s\" references undefined "
|
||
"type \"%s\""),
|
||
field_name, field_type_id);
|
||
|
||
tdesc_add_field (data->current_type, field_name, field_type);
|
||
}
|
||
else
|
||
gdb_xml_error (parser, _("Field \"%s\" has neither type nor bit position"),
|
||
field_name);
|
||
}
|
||
|
||
/* Handle the start of an <evalue> element. Attach the value to the
|
||
current enum. */
|
||
|
||
static void
|
||
tdesc_start_enum_value (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 = (struct tdesc_parsing_data *) user_data;
|
||
struct gdb_xml_value *attr;
|
||
char *field_name;
|
||
ULONGEST ul_value;
|
||
int value;
|
||
|
||
field_name = (char *) xml_find_attribute (attributes, "name")->value;
|
||
|
||
attr = xml_find_attribute (attributes, "value");
|
||
ul_value = * (ULONGEST *) attr->value;
|
||
if (ul_value > INT_MAX)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Enum value %s is larger than maximum (%d)"),
|
||
pulongest (ul_value), INT_MAX);
|
||
}
|
||
value = ul_value;
|
||
|
||
tdesc_add_enum_value (data->current_type, value, field_name);
|
||
}
|
||
|
||
/* 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 = (struct tdesc_parsing_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;
|
||
ULONGEST count;
|
||
|
||
id = (char *) attrs[0].value;
|
||
field_type_id = (char *) attrs[1].value;
|
||
count = * (ULONGEST *) attrs[2].value;
|
||
|
||
if (count > MAX_VECTOR_SIZE)
|
||
{
|
||
gdb_xml_error (parser,
|
||
_("Vector size %s is larger than maximum (%d)"),
|
||
pulongest (count), MAX_VECTOR_SIZE);
|
||
}
|
||
|
||
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. */
|
||
|
||
static const struct gdb_xml_attribute field_attributes[] = {
|
||
{ "name", GDB_XML_AF_NONE, NULL, NULL },
|
||
{ "type", GDB_XML_AF_OPTIONAL, NULL, NULL },
|
||
{ "start", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
|
||
{ "end", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
|
||
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
||
};
|
||
|
||
static const struct gdb_xml_attribute enum_value_attributes[] = {
|
||
{ "name", GDB_XML_AF_NONE, NULL, NULL },
|
||
{ "value", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
|
||
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
||
};
|
||
|
||
static const struct gdb_xml_element struct_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_element enum_children[] = {
|
||
{ "evalue", enum_value_attributes, NULL, GDB_XML_EF_REPEATABLE,
|
||
tdesc_start_enum_value, 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 struct_union_attributes[] = {
|
||
{ "id", GDB_XML_AF_NONE, NULL, NULL },
|
||
{ "size", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL},
|
||
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
||
};
|
||
|
||
static const struct gdb_xml_attribute flags_attributes[] = {
|
||
{ "id", GDB_XML_AF_NONE, NULL, NULL },
|
||
{ "size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL},
|
||
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
||
};
|
||
|
||
static const struct gdb_xml_attribute enum_attributes[] = {
|
||
{ "id", GDB_XML_AF_NONE, NULL, NULL },
|
||
{ "size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, 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 },
|
||
{ "struct", struct_union_attributes, struct_union_children,
|
||
GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
|
||
tdesc_start_struct, NULL },
|
||
{ "union", struct_union_attributes, struct_union_children,
|
||
GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
|
||
tdesc_start_union, NULL },
|
||
{ "flags", flags_attributes, struct_union_children,
|
||
GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
|
||
tdesc_start_flags, NULL },
|
||
{ "enum", enum_attributes, enum_children,
|
||
GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
|
||
tdesc_start_enum, 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 }
|
||
};
|
||
|
||
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 }
|
||
};
|
||
|
||
/* Parse DOCUMENT into a target description and return it. */
|
||
|
||
static struct target_desc *
|
||
tdesc_parse_xml (const char *document, xml_fetch_another fetcher,
|
||
void *fetcher_baton)
|
||
{
|
||
struct tdesc_parsing_data data;
|
||
|
||
/* Expand all XInclude directives. */
|
||
std::string expanded_text;
|
||
|
||
if (!xml_process_xincludes (expanded_text,
|
||
_("target description"),
|
||
document, fetcher, fetcher_baton, 0))
|
||
{
|
||
warning (_("Could not load XML target description; ignoring"));
|
||
return NULL;
|
||
}
|
||
|
||
/* Check for an exact match in the list of descriptions we have
|
||
previously parsed. */
|
||
const auto it = xml_cache.find (expanded_text);
|
||
if (it != xml_cache.end ())
|
||
return it->second;
|
||
|
||
memset (&data, 0, sizeof (struct tdesc_parsing_data));
|
||
data.tdesc = allocate_target_description ();
|
||
struct cleanup *result_cleanup
|
||
= make_cleanup_free_target_description (data.tdesc);
|
||
|
||
if (gdb_xml_parse_quick (_("target description"), "gdb-target.dtd",
|
||
tdesc_elements, expanded_text.c_str (), &data) == 0)
|
||
{
|
||
/* Parsed successfully. */
|
||
xml_cache.emplace (std::move (expanded_text), data.tdesc);
|
||
discard_cleanups (result_cleanup);
|
||
return data.tdesc;
|
||
}
|
||
else
|
||
{
|
||
warning (_("Could not load XML target description; ignoring"));
|
||
do_cleanups (result_cleanup);
|
||
return NULL;
|
||
}
|
||
}
|
||
#endif /* HAVE_LIBEXPAT */
|
||
|
||
|
||
/* Read an XML target description from FILENAME. Parse it, and return
|
||
the parsed description. */
|
||
|
||
const struct target_desc *
|
||
file_read_description_xml (const char *filename)
|
||
{
|
||
gdb::unique_xmalloc_ptr<char> tdesc_str
|
||
= xml_fetch_content_from_file (filename, NULL);
|
||
if (tdesc_str == NULL)
|
||
{
|
||
warning (_("Could not open \"%s\""), filename);
|
||
return NULL;
|
||
}
|
||
|
||
return tdesc_parse_xml (tdesc_str.get (), xml_fetch_content_from_file,
|
||
(void *) ldirname (filename).c_str ());
|
||
}
|
||
|
||
/* Read a string representation of available features from the target,
|
||
using TARGET_OBJECT_AVAILABLE_FEATURES. The returned string is
|
||
malloc allocated and NUL-terminated. NAME should be a non-NULL
|
||
string identifying the XML document we want; the top level document
|
||
is "target.xml". Other calls may be performed for the DTD or
|
||
for <xi:include>. */
|
||
|
||
static gdb::unique_xmalloc_ptr<char>
|
||
fetch_available_features_from_target (const char *name, void *baton_)
|
||
{
|
||
struct target_ops *ops = (struct target_ops *) baton_;
|
||
|
||
/* Read this object as a string. This ensures that a NUL
|
||
terminator is added. */
|
||
return target_read_stralloc (ops,
|
||
TARGET_OBJECT_AVAILABLE_FEATURES,
|
||
name);
|
||
}
|
||
|
||
|
||
/* Read an XML target description using OPS. Parse it, and return the
|
||
parsed description. */
|
||
|
||
const struct target_desc *
|
||
target_read_description_xml (struct target_ops *ops)
|
||
{
|
||
gdb::unique_xmalloc_ptr<char> tdesc_str
|
||
= fetch_available_features_from_target ("target.xml", ops);
|
||
if (tdesc_str == NULL)
|
||
return NULL;
|
||
|
||
return tdesc_parse_xml (tdesc_str.get (),
|
||
fetch_available_features_from_target,
|
||
ops);
|
||
}
|
||
|
||
/* Fetches an XML target description using OPS, processing
|
||
includes, but not parsing it. Used to dump whole tdesc
|
||
as a single XML file. */
|
||
|
||
gdb::optional<std::string>
|
||
target_fetch_description_xml (struct target_ops *ops)
|
||
{
|
||
#if !defined(HAVE_LIBEXPAT)
|
||
static int have_warned;
|
||
|
||
if (!have_warned)
|
||
{
|
||
have_warned = 1;
|
||
warning (_("Can not fetch XML target description; XML support was "
|
||
"disabled at compile time"));
|
||
}
|
||
|
||
return {};
|
||
#else
|
||
gdb::unique_xmalloc_ptr<char>
|
||
tdesc_str = fetch_available_features_from_target ("target.xml", ops);
|
||
if (tdesc_str == NULL)
|
||
return {};
|
||
|
||
std::string output;
|
||
if (!xml_process_xincludes (output,
|
||
_("target description"),
|
||
tdesc_str.get (),
|
||
fetch_available_features_from_target, ops, 0))
|
||
{
|
||
warning (_("Could not load XML target description; ignoring"));
|
||
return {};
|
||
}
|
||
return output;
|
||
#endif
|
||
}
|