gdb/memory-map.c

   1 /* Routines for handling XML memory maps provided by target.
   2
   3    Copyright (C) 2006-2018 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "memory-map.h"
  22
  23 #if !defined(HAVE_LIBEXPAT)
  24
  25 std::vector<mem_region>
  26 parse_memory_map (const char *memory_map)
  27 {
  28   static int have_warned;
  29
  30   if (!have_warned)
  31     {
  32       have_warned = 1;
  33       warning (_("Can not parse XML memory map; XML support was disabled "
  34                  "at compile time"));
  35     }
  36
  37   return std::vector<mem_region> ();
  38 }
  39
  40 #else /* HAVE_LIBEXPAT */
  41
  42 #include "xml-support.h"
  43
  44 /* Internal parsing data passed to all XML callbacks.  */
  45 struct memory_map_parsing_data
  46 {
  47   memory_map_parsing_data (std::vector<mem_region> *memory_map_)
  48   : memory_map (memory_map_)
  49   {}
  50
  51   std::vector<mem_region> *memory_map;
  52
  53   std::string property_name;
  54 };
  55
  56 /* Handle the start of a <memory> element.  */
  57
  58 static void
  59 memory_map_start_memory (struct gdb_xml_parser *parser,
  60                          const struct gdb_xml_element *element,
  61                          void *user_data, VEC(gdb_xml_value_s) *attributes)
  62 {
  63   struct memory_map_parsing_data *data
  64     = (struct memory_map_parsing_data *) user_data;
  65   ULONGEST *start_p, *length_p, *type_p;
  66
  67   start_p
  68     = (ULONGEST *) xml_find_attribute (attributes, "start")->value;
  69   length_p
  70     = (ULONGEST *) xml_find_attribute (attributes, "length")->value;
  71   type_p
  72     = (ULONGEST *) xml_find_attribute (attributes, "type")->value;
  73
  74   data->memory_map->emplace_back (*start_p, *start_p + *length_p,
  75                                   (enum mem_access_mode) *type_p);
  76 }
  77
  78 /* Handle the end of a <memory> element.  Verify that any necessary
  79    children were present.  */
  80
  81 static void
  82 memory_map_end_memory (struct gdb_xml_parser *parser,
  83                        const struct gdb_xml_element *element,
  84                        void *user_data, const char *body_text)
  85 {
  86   struct memory_map_parsing_data *data
  87     = (struct memory_map_parsing_data *) user_data;
  88   const mem_region &r = data->memory_map->back ();
  89
  90   if (r.attrib.mode == MEM_FLASH && r.attrib.blocksize == -1)
  91     gdb_xml_error (parser, _("Flash block size is not set"));
  92 }
  93
  94 /* Handle the start of a <property> element by saving the name
  95    attribute for later.  */
  96
  97 static void
  98 memory_map_start_property (struct gdb_xml_parser *parser,
  99                            const struct gdb_xml_element *element,
 100                            void *user_data, VEC(gdb_xml_value_s) *attributes)
 101 {
 102   struct memory_map_parsing_data *data
 103     = (struct memory_map_parsing_data *) user_data;
 104   char *name;
 105
 106   name = (char *) xml_find_attribute (attributes, "name")->value;
 107   data->property_name.assign (name);
 108 }
 109
 110 /* Handle the end of a <property> element and its value.  */
 111
 112 static void
 113 memory_map_end_property (struct gdb_xml_parser *parser,
 114                          const struct gdb_xml_element *element,
 115                          void *user_data, const char *body_text)
 116 {
 117   struct memory_map_parsing_data *data
 118     = (struct memory_map_parsing_data *) user_data;
 119
 120   if (data->property_name == "blocksize")
 121     {
 122       mem_region &r = data->memory_map->back ();
 123
 124       r.attrib.blocksize = gdb_xml_parse_ulongest (parser, body_text);
 125     }
 126   else
 127     gdb_xml_debug (parser, _("Unknown property \"%s\""),
 128                    data->property_name.c_str ());
 129 }
 130
 131 /* The allowed elements and attributes for an XML memory map.  */
 132
 133 const struct gdb_xml_attribute property_attributes[] = {
 134   { "name", GDB_XML_AF_NONE, NULL, NULL },
 135   { NULL, GDB_XML_AF_NONE, NULL, NULL }
 136 };
 137
 138 const struct gdb_xml_element memory_children[] = {
 139   { "property", property_attributes, NULL,
 140     GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
 141     memory_map_start_property, memory_map_end_property },
 142   { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
 143 };
 144
 145 const struct gdb_xml_enum memory_type_enum[] = {
 146   { "ram", MEM_RW },
 147   { "rom", MEM_RO },
 148   { "flash", MEM_FLASH },
 149   { NULL, 0 }
 150 };
 151
 152 const struct gdb_xml_attribute memory_attributes[] = {
 153   { "start", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
 154   { "length", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
 155   { "type", GDB_XML_AF_NONE, gdb_xml_parse_attr_enum, &memory_type_enum },
 156   { NULL, GDB_XML_AF_NONE, NULL, NULL }
 157 };
 158
 159 const struct gdb_xml_element memory_map_children[] = {
 160   { "memory", memory_attributes, memory_children, GDB_XML_EF_REPEATABLE,
 161     memory_map_start_memory, memory_map_end_memory },
 162   { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
 163 };
 164
 165 const struct gdb_xml_element memory_map_elements[] = {
 166   { "memory-map", NULL, memory_map_children, GDB_XML_EF_NONE,
 167     NULL, NULL },
 168   { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
 169 };
 170
 171 std::vector<mem_region>
 172 parse_memory_map (const char *memory_map)
 173 {
 174   std::vector<mem_region> ret;
 175   memory_map_parsing_data data (&ret);
 176
 177   if (gdb_xml_parse_quick (_("target memory map"), NULL, memory_map_elements,
 178                            memory_map, &data) == 0)
 179     {
 180       /* Parsed successfully, keep the result.  */
 181       return ret;
 182     }
 183
 184   return std::vector<mem_region> ();
 185 }
 186
 187 #endif /* HAVE_LIBEXPAT */