| 1 | /* Routines for handling XML memory maps provided by target. |
| 2 | |
| 3 | Copyright (C) 2006, 2007 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 2 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, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "memory-map.h" |
| 24 | #include "gdb_assert.h" |
| 25 | #include "exceptions.h" |
| 26 | |
| 27 | #include "gdb_string.h" |
| 28 | |
| 29 | #if !defined(HAVE_LIBEXPAT) |
| 30 | |
| 31 | VEC(mem_region_s) * |
| 32 | parse_memory_map (const char *memory_map) |
| 33 | { |
| 34 | static int have_warned; |
| 35 | |
| 36 | if (!have_warned) |
| 37 | { |
| 38 | have_warned = 1; |
| 39 | warning (_("Can not parse XML memory map; XML support was disabled " |
| 40 | "at compile time")); |
| 41 | } |
| 42 | |
| 43 | return NULL; |
| 44 | } |
| 45 | |
| 46 | #else /* HAVE_LIBEXPAT */ |
| 47 | |
| 48 | #include "xml-support.h" |
| 49 | |
| 50 | /* Internal parsing data passed to all XML callbacks. */ |
| 51 | struct memory_map_parsing_data |
| 52 | { |
| 53 | VEC(mem_region_s) **memory_map; |
| 54 | char property_name[32]; |
| 55 | }; |
| 56 | |
| 57 | /* Handle the start of a <memory> element. */ |
| 58 | |
| 59 | static void |
| 60 | memory_map_start_memory (struct gdb_xml_parser *parser, |
| 61 | const struct gdb_xml_element *element, |
| 62 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 63 | { |
| 64 | struct memory_map_parsing_data *data = user_data; |
| 65 | struct mem_region *r = VEC_safe_push (mem_region_s, *data->memory_map, NULL); |
| 66 | ULONGEST *start_p, *length_p, *type_p; |
| 67 | |
| 68 | start_p = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 69 | length_p = VEC_index (gdb_xml_value_s, attributes, 1)->value; |
| 70 | type_p = VEC_index (gdb_xml_value_s, attributes, 2)->value; |
| 71 | |
| 72 | mem_region_init (r); |
| 73 | r->lo = *start_p; |
| 74 | r->hi = r->lo + *length_p; |
| 75 | r->attrib.mode = *type_p; |
| 76 | r->attrib.blocksize = -1; |
| 77 | } |
| 78 | |
| 79 | /* Handle the end of a <memory> element. Verify that any necessary |
| 80 | children were present. */ |
| 81 | |
| 82 | static void |
| 83 | memory_map_end_memory (struct gdb_xml_parser *parser, |
| 84 | const struct gdb_xml_element *element, |
| 85 | void *user_data, const char *body_text) |
| 86 | { |
| 87 | struct memory_map_parsing_data *data = user_data; |
| 88 | struct mem_region *r = VEC_last (mem_region_s, *data->memory_map); |
| 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 = user_data; |
| 103 | char *name; |
| 104 | |
| 105 | name = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 106 | snprintf (data->property_name, sizeof (data->property_name), "%s", name); |
| 107 | } |
| 108 | |
| 109 | /* Handle the end of a <property> element and its value. */ |
| 110 | |
| 111 | static void |
| 112 | memory_map_end_property (struct gdb_xml_parser *parser, |
| 113 | const struct gdb_xml_element *element, |
| 114 | void *user_data, const char *body_text) |
| 115 | { |
| 116 | struct memory_map_parsing_data *data = user_data; |
| 117 | char *name = data->property_name; |
| 118 | |
| 119 | if (strcmp (name, "blocksize") == 0) |
| 120 | { |
| 121 | struct mem_region *r = VEC_last (mem_region_s, *data->memory_map); |
| 122 | |
| 123 | r->attrib.blocksize = gdb_xml_parse_ulongest (parser, body_text); |
| 124 | } |
| 125 | else |
| 126 | gdb_xml_debug (parser, _("Unknown property \"%s\""), name); |
| 127 | } |
| 128 | |
| 129 | /* Discard the constructed memory map (if an error occurs). */ |
| 130 | |
| 131 | static void |
| 132 | clear_result (void *p) |
| 133 | { |
| 134 | VEC(mem_region_s) **result = p; |
| 135 | VEC_free (mem_region_s, *result); |
| 136 | *result = NULL; |
| 137 | } |
| 138 | |
| 139 | /* The allowed elements and attributes for an XML memory map. */ |
| 140 | |
| 141 | const struct gdb_xml_attribute property_attributes[] = { |
| 142 | { "name", GDB_XML_AF_NONE, NULL, NULL }, |
| 143 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 144 | }; |
| 145 | |
| 146 | const struct gdb_xml_element memory_children[] = { |
| 147 | { "property", property_attributes, NULL, |
| 148 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, |
| 149 | memory_map_start_property, memory_map_end_property }, |
| 150 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 151 | }; |
| 152 | |
| 153 | const struct gdb_xml_enum memory_type_enum[] = { |
| 154 | { "ram", MEM_RW }, |
| 155 | { "rom", MEM_RO }, |
| 156 | { "flash", MEM_FLASH }, |
| 157 | { NULL, 0 } |
| 158 | }; |
| 159 | |
| 160 | const struct gdb_xml_attribute memory_attributes[] = { |
| 161 | { "start", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| 162 | { "length", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| 163 | { "type", GDB_XML_AF_NONE, gdb_xml_parse_attr_enum, &memory_type_enum }, |
| 164 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 165 | }; |
| 166 | |
| 167 | const struct gdb_xml_element memory_map_children[] = { |
| 168 | { "memory", memory_attributes, memory_children, GDB_XML_EF_REPEATABLE, |
| 169 | memory_map_start_memory, memory_map_end_memory }, |
| 170 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 171 | }; |
| 172 | |
| 173 | const struct gdb_xml_element memory_map_elements[] = { |
| 174 | { "memory-map", NULL, memory_map_children, GDB_XML_EF_NONE, |
| 175 | NULL, NULL }, |
| 176 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 177 | }; |
| 178 | |
| 179 | VEC(mem_region_s) * |
| 180 | parse_memory_map (const char *memory_map) |
| 181 | { |
| 182 | struct gdb_xml_parser *parser; |
| 183 | VEC(mem_region_s) *result = NULL; |
| 184 | struct cleanup *before_deleting_result, *back_to; |
| 185 | struct memory_map_parsing_data data = {}; |
| 186 | |
| 187 | back_to = make_cleanup (null_cleanup, NULL); |
| 188 | parser = gdb_xml_create_parser_and_cleanup (_("target memory map"), |
| 189 | memory_map_elements, &data); |
| 190 | |
| 191 | /* Note: 'clear_result' will zero 'result'. */ |
| 192 | before_deleting_result = make_cleanup (clear_result, &result); |
| 193 | data.memory_map = &result; |
| 194 | |
| 195 | if (gdb_xml_parse (parser, memory_map) == 0) |
| 196 | /* Parsed successfully, don't need to delete the result. */ |
| 197 | discard_cleanups (before_deleting_result); |
| 198 | |
| 199 | do_cleanups (back_to); |
| 200 | return result; |
| 201 | } |
| 202 | |
| 203 | #endif /* HAVE_LIBEXPAT */ |