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"
53 # define XML_STATUS_OK 1
54 # define XML_STATUS_ERROR 0
57 /* Internal parsing data passed to all Expat callbacks. */
58 struct memory_map_parsing_data
60 VEC(mem_region_s) **memory_map;
61 struct mem_region *currently_parsing;
63 const char *property_name;
68 free_memory_map_parsing_data (void *p_)
70 struct memory_map_parsing_data *p = p_;
72 xfree (p->character_data);
75 /* Callback called by Expat on start of element.
76 DATA_ is pointer to memory_map_parsing_data
77 NAME is the name of element
78 ATTRS is the zero-terminated array of attribute names and
81 This function handles the following elements:
82 - 'memory' -- creates a new memory region and initializes it
83 from attributes. Sets DATA_.currently_parsing to the new region.
84 - 'properties' -- sets DATA.capture_text. */
87 memory_map_start_element (void *data_, const XML_Char *name,
88 const XML_Char **attrs)
90 static const XML_Char *type_names[] = {"ram", "rom", "flash", 0};
91 static int type_values[] = { MEM_RW, MEM_RO, MEM_FLASH };
92 struct memory_map_parsing_data *data = data_;
93 struct gdb_exception ex;
95 TRY_CATCH (ex, RETURN_MASK_ERROR)
97 if (strcmp (name, "memory") == 0)
101 r = VEC_safe_push (mem_region_s, *data->memory_map, NULL);
104 r->lo = xml_get_integer_attribute (attrs, "start");
105 r->hi = r->lo + xml_get_integer_attribute (attrs, "length");
106 r->attrib.mode = xml_get_enum_value (attrs, "type", type_names,
108 r->attrib.blocksize = -1;
110 data->currently_parsing = r;
112 else if (strcmp (name, "property") == 0)
114 if (!data->currently_parsing)
115 throw_error (XML_PARSE_ERROR,
116 _("memory map: found 'property' element outside 'memory'"));
118 data->capture_text = 1;
120 data->property_name = xml_get_required_attribute (attrs, "name");
125 (ex.error, _("While parsing element %s:\n%s"), name, ex.message);
128 /* Callback called by Expat on start of element. DATA_ is a pointer
129 to our memory_map_parsing_data. NAME is the name of the element.
131 This function handles the following elements:
132 - 'property' -- check that the property name is 'blocksize' and
133 sets DATA->currently_parsing->attrib.blocksize
134 - 'memory' verifies that flash block size is set. */
137 memory_map_end_element (void *data_, const XML_Char *name)
139 struct memory_map_parsing_data *data = data_;
140 struct gdb_exception ex;
142 TRY_CATCH (ex, RETURN_MASK_ERROR)
144 if (strcmp (name, "property") == 0)
146 if (strcmp (data->property_name, "blocksize") == 0)
148 if (!data->character_data)
149 throw_error (XML_PARSE_ERROR,
150 _("Empty content of 'property' element"));
152 data->currently_parsing->attrib.blocksize
153 = strtoul (data->character_data, &end, 0);
155 throw_error (XML_PARSE_ERROR,
156 _("Invalid content of the 'blocksize' property"));
159 throw_error (XML_PARSE_ERROR,
160 _("Unknown memory region property: %s"), name);
162 data->capture_text = 0;
164 else if (strcmp (name, "memory") == 0)
166 if (data->currently_parsing->attrib.mode == MEM_FLASH
167 && data->currently_parsing->attrib.blocksize == -1)
168 throw_error (XML_PARSE_ERROR,
169 _("Flash block size is not set"));
171 data->currently_parsing = 0;
172 data->character_data = 0;
177 (ex.error, _("while parsing element %s: \n%s"), name, ex.message);
180 /* Callback called by expat for all character data blocks.
181 DATA_ is the pointer to memory_map_parsing_data.
182 S is the point to character data.
183 LEN is the length of data; the data is not zero-terminated.
185 If DATA_->CAPTURE_TEXT is 1, appends this block of characters
186 to DATA_->CHARACTER_DATA. */
188 memory_map_character_data (void *data_, const XML_Char *s,
191 struct memory_map_parsing_data *data = data_;
192 int current_size = 0;
194 if (!data->capture_text)
197 /* Expat interface does not guarantee that a single call to
198 a handler will be made. Actually, one call for each line
199 will be made, and character data can possibly span several
202 Take care to realloc the data if needed. */
203 if (!data->character_data)
204 data->character_data = xmalloc (len + 1);
207 current_size = strlen (data->character_data);
208 data->character_data = xrealloc (data->character_data,
209 current_size + len + 1);
212 memcpy (data->character_data + current_size, s, len);
213 data->character_data[current_size + len] = '\0';
217 clear_result (void *p)
219 VEC(mem_region_s) **result = p;
220 VEC_free (mem_region_s, *result);
225 parse_memory_map (const char *memory_map)
227 VEC(mem_region_s) *result = NULL;
228 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
229 struct cleanup *before_deleting_result;
230 struct cleanup *saved;
231 volatile struct gdb_exception ex;
234 struct memory_map_parsing_data data = {};
236 XML_Parser parser = XML_ParserCreateNS (NULL, '!');
240 make_cleanup_free_xml_parser (parser);
241 make_cleanup (free_memory_map_parsing_data, &data);
242 /* Note: 'clear_result' will zero 'result'. */
243 before_deleting_result = make_cleanup (clear_result, &result);
245 XML_SetElementHandler (parser, memory_map_start_element,
246 memory_map_end_element);
247 XML_SetCharacterDataHandler (parser, memory_map_character_data);
248 XML_SetUserData (parser, &data);
249 data.memory_map = &result;
251 TRY_CATCH (ex, RETURN_MASK_ERROR)
253 if (XML_Parse (parser, memory_map, strlen (memory_map), 1)
256 enum XML_Error err = XML_GetErrorCode (parser);
258 throw_error (XML_PARSE_ERROR, "%s", XML_ErrorString (err));
261 if (ex.reason != GDB_NO_ERROR)
263 if (ex.error == XML_PARSE_ERROR)
264 /* Just report it. */
265 warning (_("Could not parse XML memory map: %s"), ex.message);
267 throw_exception (ex);
270 /* Parsed successfully, don't need to delete the result. */
271 discard_cleanups (before_deleting_result);
274 do_cleanups (back_to);
278 #endif /* HAVE_LIBEXPAT */