1 /* Routines for handling XML memory maps provided by target.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 #include "memory-map.h"
25 #include "gdb_assert.h"
26 #include "exceptions.h"
28 #include "gdb_string.h"
30 #if !defined(HAVE_LIBEXPAT)
33 parse_memory_map (const char *memory_map)
35 static int have_warned;
40 warning (_("Can not parse XML memory map; XML support was disabled "
47 #else /* HAVE_LIBEXPAT */
49 #include "xml-support.h"
51 #include "gdb_expat.h"
53 /* Internal parsing data passed to all Expat callbacks. */
54 struct memory_map_parsing_data
56 VEC(mem_region_s) **memory_map;
57 struct mem_region *currently_parsing;
59 const char *property_name;
64 free_memory_map_parsing_data (void *p_)
66 struct memory_map_parsing_data *p = p_;
68 xfree (p->character_data);
71 /* Callback called by Expat on start of element.
72 DATA_ is pointer to memory_map_parsing_data
73 NAME is the name of element
74 ATTRS is the zero-terminated array of attribute names and
77 This function handles the following elements:
78 - 'memory' -- creates a new memory region and initializes it
79 from attributes. Sets DATA_.currently_parsing to the new region.
80 - 'properties' -- sets DATA.capture_text. */
83 memory_map_start_element (void *data_, const XML_Char *name,
84 const XML_Char **attrs)
86 static const XML_Char *type_names[] = {"ram", "rom", "flash", 0};
87 static int type_values[] = { MEM_RW, MEM_RO, MEM_FLASH };
88 struct memory_map_parsing_data *data = data_;
89 struct gdb_exception ex;
91 TRY_CATCH (ex, RETURN_MASK_ERROR)
93 if (strcmp (name, "memory") == 0)
97 r = VEC_safe_push (mem_region_s, *data->memory_map, NULL);
100 r->lo = xml_get_integer_attribute (attrs, "start");
101 r->hi = r->lo + xml_get_integer_attribute (attrs, "length");
102 r->attrib.mode = xml_get_enum_value (attrs, "type", type_names,
104 r->attrib.blocksize = -1;
106 data->currently_parsing = r;
108 else if (strcmp (name, "property") == 0)
110 if (!data->currently_parsing)
111 throw_error (XML_PARSE_ERROR,
112 _("memory map: found 'property' element outside 'memory'"));
114 data->capture_text = 1;
116 data->property_name = xml_get_required_attribute (attrs, "name");
121 (ex.error, _("While parsing element %s:\n%s"), name, ex.message);
124 /* Callback called by Expat on start of element. DATA_ is a pointer
125 to our memory_map_parsing_data. NAME is the name of the element.
127 This function handles the following elements:
128 - 'property' -- check that the property name is 'blocksize' and
129 sets DATA->currently_parsing->attrib.blocksize
130 - 'memory' verifies that flash block size is set. */
133 memory_map_end_element (void *data_, const XML_Char *name)
135 struct memory_map_parsing_data *data = data_;
136 struct gdb_exception ex;
138 TRY_CATCH (ex, RETURN_MASK_ERROR)
140 if (strcmp (name, "property") == 0)
142 if (strcmp (data->property_name, "blocksize") == 0)
146 if (!data->character_data)
147 throw_error (XML_PARSE_ERROR,
148 _("Empty content of 'property' element"));
149 data->currently_parsing->attrib.blocksize
150 = strtoul (data->character_data, &end, 0);
152 throw_error (XML_PARSE_ERROR,
153 _("Invalid content of the 'blocksize' property"));
156 throw_error (XML_PARSE_ERROR,
157 _("Unknown memory region property: %s"), name);
159 data->capture_text = 0;
161 else if (strcmp (name, "memory") == 0)
163 if (data->currently_parsing->attrib.mode == MEM_FLASH
164 && data->currently_parsing->attrib.blocksize == -1)
165 throw_error (XML_PARSE_ERROR,
166 _("Flash block size is not set"));
168 data->currently_parsing = 0;
169 data->character_data = 0;
174 (ex.error, _("while parsing element %s: \n%s"), name, ex.message);
177 /* Callback called by expat for all character data blocks.
178 DATA_ is the pointer to memory_map_parsing_data.
179 S is the point to character data.
180 LEN is the length of data; the data is not zero-terminated.
182 If DATA_->CAPTURE_TEXT is 1, appends this block of characters
183 to DATA_->CHARACTER_DATA. */
185 memory_map_character_data (void *data_, const XML_Char *s,
188 struct memory_map_parsing_data *data = data_;
189 int current_size = 0;
191 if (!data->capture_text)
194 /* Expat interface does not guarantee that a single call to
195 a handler will be made. Actually, one call for each line
196 will be made, and character data can possibly span several
199 Take care to realloc the data if needed. */
200 if (!data->character_data)
201 data->character_data = xmalloc (len + 1);
204 current_size = strlen (data->character_data);
205 data->character_data = xrealloc (data->character_data,
206 current_size + len + 1);
209 memcpy (data->character_data + current_size, s, len);
210 data->character_data[current_size + len] = '\0';
214 clear_result (void *p)
216 VEC(mem_region_s) **result = p;
217 VEC_free (mem_region_s, *result);
222 parse_memory_map (const char *memory_map)
224 VEC(mem_region_s) *result = NULL;
225 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
226 struct cleanup *before_deleting_result;
227 struct cleanup *saved;
228 volatile struct gdb_exception ex;
231 struct memory_map_parsing_data data = {};
233 XML_Parser parser = XML_ParserCreateNS (NULL, '!');
237 make_cleanup_free_xml_parser (parser);
238 make_cleanup (free_memory_map_parsing_data, &data);
239 /* Note: 'clear_result' will zero 'result'. */
240 before_deleting_result = make_cleanup (clear_result, &result);
242 XML_SetElementHandler (parser, memory_map_start_element,
243 memory_map_end_element);
244 XML_SetCharacterDataHandler (parser, memory_map_character_data);
245 XML_SetUserData (parser, &data);
246 data.memory_map = &result;
248 TRY_CATCH (ex, RETURN_MASK_ERROR)
250 if (XML_Parse (parser, memory_map, strlen (memory_map), 1)
253 enum XML_Error err = XML_GetErrorCode (parser);
255 throw_error (XML_PARSE_ERROR, "%s", XML_ErrorString (err));
258 if (ex.reason != GDB_NO_ERROR)
260 if (ex.error == XML_PARSE_ERROR)
261 /* Just report it. */
262 warning (_("Could not parse XML memory map: %s"), ex.message);
264 throw_exception (ex);
267 /* Parsed successfully, don't need to delete the result. */
268 discard_cleanups (before_deleting_result);
271 do_cleanups (back_to);
275 #endif /* HAVE_LIBEXPAT */