205 lines
5.9 KiB
C
205 lines
5.9 KiB
C
/* Routines for handling XML memory maps provided by target.
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Copyright (C) 2006
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "memory-map.h"
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#include "gdb_assert.h"
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#include "exceptions.h"
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#include "gdb_string.h"
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#if !defined(HAVE_LIBEXPAT)
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VEC(mem_region_s) *
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parse_memory_map (const char *memory_map)
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{
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static int have_warned;
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if (!have_warned)
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{
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have_warned = 1;
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warning (_("Can not parse XML memory map; XML support was disabled "
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"at compile time"));
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}
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return NULL;
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}
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#else /* HAVE_LIBEXPAT */
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#include "xml-support.h"
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/* Internal parsing data passed to all XML callbacks. */
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struct memory_map_parsing_data
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{
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VEC(mem_region_s) **memory_map;
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char property_name[32];
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};
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/* Handle the start of a <memory> element. */
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static void
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memory_map_start_memory (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC(gdb_xml_value_s) *attributes)
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{
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struct memory_map_parsing_data *data = user_data;
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struct mem_region *r = VEC_safe_push (mem_region_s, *data->memory_map, NULL);
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ULONGEST *start_p, *length_p, *type_p;
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start_p = VEC_index (gdb_xml_value_s, attributes, 0)->value;
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length_p = VEC_index (gdb_xml_value_s, attributes, 1)->value;
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type_p = VEC_index (gdb_xml_value_s, attributes, 2)->value;
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mem_region_init (r);
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r->lo = *start_p;
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r->hi = r->lo + *length_p;
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r->attrib.mode = *type_p;
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r->attrib.blocksize = -1;
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}
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/* Handle the end of a <memory> element. Verify that any necessary
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children were present. */
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static void
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memory_map_end_memory (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, const char *body_text)
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{
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struct memory_map_parsing_data *data = user_data;
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struct mem_region *r = VEC_last (mem_region_s, *data->memory_map);
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if (r->attrib.mode == MEM_FLASH && r->attrib.blocksize == -1)
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gdb_xml_error (parser, _("Flash block size is not set"));
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}
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/* Handle the start of a <property> element by saving the name
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attribute for later. */
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static void
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memory_map_start_property (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC(gdb_xml_value_s) *attributes)
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{
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struct memory_map_parsing_data *data = user_data;
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char *name;
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name = VEC_index (gdb_xml_value_s, attributes, 0)->value;
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snprintf (data->property_name, sizeof (data->property_name), "%s", name);
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}
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/* Handle the end of a <property> element and its value. */
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static void
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memory_map_end_property (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, const char *body_text)
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{
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struct memory_map_parsing_data *data = user_data;
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char *name = data->property_name;
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if (strcmp (name, "blocksize") == 0)
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{
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struct mem_region *r = VEC_last (mem_region_s, *data->memory_map);
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r->attrib.blocksize = gdb_xml_parse_ulongest (parser, body_text);
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}
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else
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gdb_xml_debug (parser, _("Unknown property \"%s\""), name);
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}
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/* Discard the constructed memory map (if an error occurs). */
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static void
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clear_result (void *p)
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{
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VEC(mem_region_s) **result = p;
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VEC_free (mem_region_s, *result);
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*result = NULL;
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}
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/* The allowed elements and attributes for an XML memory map. */
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const struct gdb_xml_attribute property_attributes[] = {
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{ "name", GDB_XML_AF_NONE, NULL, NULL },
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{ NULL, GDB_XML_AF_NONE, NULL, NULL }
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};
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const struct gdb_xml_element memory_children[] = {
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{ "property", property_attributes, NULL,
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GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
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memory_map_start_property, memory_map_end_property },
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{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
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};
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const struct gdb_xml_enum memory_type_enum[] = {
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{ "ram", MEM_RW },
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{ "rom", MEM_RO },
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{ "flash", MEM_FLASH },
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{ NULL, 0 }
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};
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const struct gdb_xml_attribute memory_attributes[] = {
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{ "start", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
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{ "length", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
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{ "type", GDB_XML_AF_NONE, gdb_xml_parse_attr_enum, &memory_type_enum },
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{ NULL, GDB_XML_AF_NONE, NULL, NULL }
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};
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const struct gdb_xml_element memory_map_children[] = {
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{ "memory", memory_attributes, memory_children, GDB_XML_EF_REPEATABLE,
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memory_map_start_memory, memory_map_end_memory },
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{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
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};
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const struct gdb_xml_element memory_map_elements[] = {
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{ "memory-map", NULL, memory_map_children, GDB_XML_EF_NONE,
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NULL, NULL },
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{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
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};
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VEC(mem_region_s) *
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parse_memory_map (const char *memory_map)
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{
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struct gdb_xml_parser *parser;
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VEC(mem_region_s) *result = NULL;
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struct cleanup *before_deleting_result, *back_to;
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struct memory_map_parsing_data data = {};
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back_to = make_cleanup (null_cleanup, NULL);
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parser = gdb_xml_create_parser_and_cleanup (_("target memory map"),
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memory_map_elements, &data);
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/* Note: 'clear_result' will zero 'result'. */
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before_deleting_result = make_cleanup (clear_result, &result);
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data.memory_map = &result;
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if (gdb_xml_parse (parser, memory_map) == 0)
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/* Parsed successfully, don't need to delete the result. */
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discard_cleanups (before_deleting_result);
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do_cleanups (back_to);
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return result;
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}
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#endif /* HAVE_LIBEXPAT */
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