/* Routines for handling XML memory maps provided by target.
- Copyright (C) 2006
- Free Software Foundation, Inc.
+ Copyright (C) 2006-2020 Free Software Foundation, Inc.
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 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 "memory-map.h"
-#include "gdb_assert.h"
-#include "exceptions.h"
-
-#include "gdb_string.h"
#if !defined(HAVE_LIBEXPAT)
-VEC(mem_region_s) *
+std::vector<mem_region>
parse_memory_map (const char *memory_map)
{
static int have_warned;
"at compile time"));
}
- return NULL;
+ return std::vector<mem_region> ();
}
#else /* HAVE_LIBEXPAT */
#include "xml-support.h"
-#include <expat.h>
-/* Internal parsing data passed to all Expat callbacks. */
+/* Internal parsing data passed to all XML callbacks. */
struct memory_map_parsing_data
- {
- VEC(mem_region_s) **memory_map;
- struct mem_region *currently_parsing;
- char *character_data;
- const char *property_name;
- int capture_text;
- };
-
-static void
-free_memory_map_parsing_data (void *p_)
{
- struct memory_map_parsing_data *p = p_;
+ memory_map_parsing_data (std::vector<mem_region> *memory_map_)
+ : memory_map (memory_map_)
+ {}
- xfree (p->character_data);
-}
+ std::vector<mem_region> *memory_map;
-/* Callback called by Expat on start of element.
- DATA_ is pointer to memory_map_parsing_data
- NAME is the name of element
- ATTRS is the zero-terminated array of attribute names and
- attribute values.
+ std::string property_name;
+};
- This function handles the following elements:
- - 'memory' -- creates a new memory region and initializes it
- from attributes. Sets DATA_.currently_parsing to the new region.
- - 'properties' -- sets DATA.capture_text. */
+/* Handle the start of a <memory> element. */
static void
-memory_map_start_element (void *data_, const XML_Char *name,
- const XML_Char **attrs)
+memory_map_start_memory (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
- static const XML_Char *type_names[] = {"ram", "rom", "flash", 0};
- static int type_values[] = { MEM_RW, MEM_RO, MEM_FLASH };
- struct memory_map_parsing_data *data = data_;
- struct gdb_exception ex;
-
- TRY_CATCH (ex, RETURN_MASK_ERROR)
- {
- if (strcmp (name, "memory") == 0)
- {
- struct mem_region *r;
-
- r = VEC_safe_push (mem_region_s, *data->memory_map, NULL);
- mem_region_init (r);
-
- r->lo = xml_get_integer_attribute (attrs, "start");
- r->hi = r->lo + xml_get_integer_attribute (attrs, "length");
- r->attrib.mode = xml_get_enum_value (attrs, "type", type_names,
- type_values);
- r->attrib.blocksize = -1;
-
- data->currently_parsing = r;
- }
- else if (strcmp (name, "property") == 0)
- {
- if (!data->currently_parsing)
- throw_error (XML_PARSE_ERROR,
- _("memory map: found 'property' element outside 'memory'"));
-
- data->capture_text = 1;
-
- data->property_name = xml_get_required_attribute (attrs, "name");
- }
- }
- if (ex.reason < 0)
- throw_error
- (ex.error, _("While parsing element %s:\n%s"), name, ex.message);
+ struct memory_map_parsing_data *data
+ = (struct memory_map_parsing_data *) user_data;
+ ULONGEST *start_p, *length_p, *type_p;
+
+ start_p
+ = (ULONGEST *) xml_find_attribute (attributes, "start")->value.get ();
+ length_p
+ = (ULONGEST *) xml_find_attribute (attributes, "length")->value.get ();
+ type_p
+ = (ULONGEST *) xml_find_attribute (attributes, "type")->value.get ();
+
+ data->memory_map->emplace_back (*start_p, *start_p + *length_p,
+ (enum mem_access_mode) *type_p);
}
-/* Callback called by Expat on start of element. DATA_ is a pointer
- to our memory_map_parsing_data. NAME is the name of the element.
-
- This function handles the following elements:
- - 'property' -- check that the property name is 'blocksize' and
- sets DATA->currently_parsing->attrib.blocksize
- - 'memory' verifies that flash block size is set. */
+/* Handle the end of a <memory> element. Verify that any necessary
+ children were present. */
static void
-memory_map_end_element (void *data_, const XML_Char *name)
+memory_map_end_memory (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, const char *body_text)
{
- struct memory_map_parsing_data *data = data_;
- struct gdb_exception ex;
+ struct memory_map_parsing_data *data
+ = (struct memory_map_parsing_data *) user_data;
+ const mem_region &r = data->memory_map->back ();
- TRY_CATCH (ex, RETURN_MASK_ERROR)
- {
- if (strcmp (name, "property") == 0)
- {
- if (strcmp (data->property_name, "blocksize") == 0)
- {
- if (!data->character_data)
- throw_error (XML_PARSE_ERROR,
- _("Empty content of 'property' element"));
- char *end = NULL;
- data->currently_parsing->attrib.blocksize
- = strtoul (data->character_data, &end, 0);
- if (*end != '\0')
- throw_error (XML_PARSE_ERROR,
- _("Invalid content of the 'blocksize' property"));
- }
- else
- throw_error (XML_PARSE_ERROR,
- _("Unknown memory region property: %s"), name);
-
- data->capture_text = 0;
- }
- else if (strcmp (name, "memory") == 0)
- {
- if (data->currently_parsing->attrib.mode == MEM_FLASH
- && data->currently_parsing->attrib.blocksize == -1)
- throw_error (XML_PARSE_ERROR,
- _("Flash block size is not set"));
-
- data->currently_parsing = 0;
- data->character_data = 0;
- }
- }
- if (ex.reason < 0)
- throw_error
- (ex.error, _("while parsing element %s: \n%s"), name, ex.message);
+ if (r.attrib.mode == MEM_FLASH && r.attrib.blocksize == -1)
+ gdb_xml_error (parser, _("Flash block size is not set"));
}
-/* Callback called by expat for all character data blocks.
- DATA_ is the pointer to memory_map_parsing_data.
- S is the point to character data.
- LEN is the length of data; the data is not zero-terminated.
+/* Handle the start of a <property> element by saving the name
+ attribute for later. */
- If DATA_->CAPTURE_TEXT is 1, appends this block of characters
- to DATA_->CHARACTER_DATA. */
static void
-memory_map_character_data (void *data_, const XML_Char *s,
- int len)
+memory_map_start_property (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
- struct memory_map_parsing_data *data = data_;
- int current_size = 0;
+ struct memory_map_parsing_data *data
+ = (struct memory_map_parsing_data *) user_data;
+ char *name;
- if (!data->capture_text)
- return;
-
- /* Expat interface does not guarantee that a single call to
- a handler will be made. Actually, one call for each line
- will be made, and character data can possibly span several
- lines.
-
- Take care to realloc the data if needed. */
- if (!data->character_data)
- data->character_data = xmalloc (len + 1);
- else
- {
- current_size = strlen (data->character_data);
- data->character_data = xrealloc (data->character_data,
- current_size + len + 1);
- }
-
- memcpy (data->character_data + current_size, s, len);
- data->character_data[current_size + len] = '\0';
+ name = (char *) xml_find_attribute (attributes, "name")->value.get ();
+ data->property_name.assign (name);
}
+/* Handle the end of a <property> element and its value. */
+
static void
-clear_result (void *p)
+memory_map_end_property (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, const char *body_text)
{
- VEC(mem_region_s) **result = p;
- VEC_free (mem_region_s, *result);
- *result = NULL;
+ struct memory_map_parsing_data *data
+ = (struct memory_map_parsing_data *) user_data;
+
+ if (data->property_name == "blocksize")
+ {
+ mem_region &r = data->memory_map->back ();
+
+ r.attrib.blocksize = gdb_xml_parse_ulongest (parser, body_text);
+ }
+ else
+ gdb_xml_debug (parser, _("Unknown property \"%s\""),
+ data->property_name.c_str ());
}
-VEC(mem_region_s) *
+/* The allowed elements and attributes for an XML memory map. */
+
+const struct gdb_xml_attribute property_attributes[] = {
+ { "name", GDB_XML_AF_NONE, NULL, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+const struct gdb_xml_element memory_children[] = {
+ { "property", property_attributes, NULL,
+ GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
+ memory_map_start_property, memory_map_end_property },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+const struct gdb_xml_enum memory_type_enum[] = {
+ { "ram", MEM_RW },
+ { "rom", MEM_RO },
+ { "flash", MEM_FLASH },
+ { NULL, 0 }
+};
+
+const struct gdb_xml_attribute memory_attributes[] = {
+ { "start", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
+ { "length", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
+ { "type", GDB_XML_AF_NONE, gdb_xml_parse_attr_enum, &memory_type_enum },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+const struct gdb_xml_element memory_map_children[] = {
+ { "memory", memory_attributes, memory_children, GDB_XML_EF_REPEATABLE,
+ memory_map_start_memory, memory_map_end_memory },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+const struct gdb_xml_element memory_map_elements[] = {
+ { "memory-map", NULL, memory_map_children, GDB_XML_EF_NONE,
+ NULL, NULL },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+std::vector<mem_region>
parse_memory_map (const char *memory_map)
{
- VEC(mem_region_s) *result = NULL;
- struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
- struct cleanup *before_deleting_result;
- struct cleanup *saved;
- volatile struct gdb_exception ex;
- int ok = 0;
-
- struct memory_map_parsing_data data = {};
-
- XML_Parser parser = XML_ParserCreateNS (NULL, '!');
- if (parser == NULL)
- goto out;
-
- make_cleanup_free_xml_parser (parser);
- make_cleanup (free_memory_map_parsing_data, &data);
- /* Note: 'clear_result' will zero 'result'. */
- before_deleting_result = make_cleanup (clear_result, &result);
-
- XML_SetElementHandler (parser, memory_map_start_element,
- memory_map_end_element);
- XML_SetCharacterDataHandler (parser, memory_map_character_data);
- XML_SetUserData (parser, &data);
- data.memory_map = &result;
-
- TRY_CATCH (ex, RETURN_MASK_ERROR)
- {
- if (XML_Parse (parser, memory_map, strlen (memory_map), 1)
- != XML_STATUS_OK)
- {
- enum XML_Error err = XML_GetErrorCode (parser);
+ std::vector<mem_region> ret;
+ memory_map_parsing_data data (&ret);
- throw_error (XML_PARSE_ERROR, "%s", XML_ErrorString (err));
- }
- }
- if (ex.reason != GDB_NO_ERROR)
+ if (gdb_xml_parse_quick (_("target memory map"), NULL, memory_map_elements,
+ memory_map, &data) == 0)
{
- if (ex.error == XML_PARSE_ERROR)
- /* Just report it. */
- warning (_("Could not parse XML memory map: %s"), ex.message);
- else
- throw_exception (ex);
+ /* Parsed successfully, keep the result. */
+ return ret;
}
- else
- /* Parsed successfully, don't need to delete the result. */
- discard_cleanups (before_deleting_result);
- out:
- do_cleanups (back_to);
- return result;
+ return std::vector<mem_region> ();
}
#endif /* HAVE_LIBEXPAT */
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