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authorDaniel Jacobowitz <dan@debian.org>2006-09-21 13:54:03 +0000
committerDaniel Jacobowitz <dan@debian.org>2006-09-21 13:54:03 +0000
commit0db1deea44f24680af47168d22114a3d3c91bd7f (patch)
treeeadf9391ef39e78b94b3cea7f2b098fdc44f7290 /gdb/memory-map.c
parentcdbf4cd48d4c74ddb4859dd2bb7dda31cbf465f1 (diff)
downloadgdb-0db1deea44f24680af47168d22114a3d3c91bd7f.tar.gz
gdb/
2006-09-21 Vladimir Prus <vladimir@codesourcery.com> Daniel Jacobowitz <dan@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> * Makefile.in (SFILES): Add memory-map.c and xml-support.c. (memory_map_h, xml_support_h): New. (target_h): Add vec_h dependency. (COMMON_OBS): Add memory-map.o and xml-support.o. (memory-map.o, xml-support.o): New rules. (remote.o): Update. * exceptions.h (enum errors): Add XML_PARSE_ERROR. * infcmd.c (run_command_1, attach_command): Call target_pre_inferior. * memattr.c (default_mem_attrib): Initialize blocksize. (target_mem_region_list, mem_use_target) (target_mem_regions_valid, mem_region_cmp, mem_region_init) (require_user_regions, require_target_regions) (invalidate_target_mem_regions): New. (create_mem_region): Use mem_region_init. (mem_clear): Move higher. (lookup_mem_region): Use require_target_regions. (mem_command): Implement "mem auto". (mem_info_command): Handle target-supplied regions and flash attributes. (mem_enable_command, mem_disable_command, mem_delete_command): Use require_user_regions. (_initialize_mem): Mention "mem auto" in help. * memattr.h (enum mem_access_mode): Add MEM_FLASH. (struct mem_attrib): Add blocksize. (invalidate_target_mem_regions, mem_region_init, mem_region_cmp): New prototypes. * remote.c: Include "memory-map.h". (PACKET_qXfer_memory_map): New enum value. (remote_protocol_features): Add qXfer:memory-map:read. (remote_xfer_partial): Handle memory maps. (remote_memory_map): New. (init_remote_ops, init_remote_async_ops): Set to_memory_map. (_initialize_remote): Register qXfer:memory-map:read. * target.c (update_current_target): Mention to_memory_map. (target_memory_map, target_pre_inferior): New. (target_preopen): Call target_pre_inferior. * target.h: Include "vec.h". (enum target_object): Add TARGET_OBJECT_MEMORY_MAP. (struct target_ops): Add to_memory_map. (target_memory_map, target_pre_inferior): New prototypes. * memory-map.c, memory-map.h, xml-support.c, xml-support.h: New files. gdb/doc/ 2006-09-21 Vladimir Prus <vladimir@codesourcery.com> Daniel Jacobowitz <dan@codesourcery.com> * gdb.texinfo (Memory Region Attributes): Mention target-supplied memory regions and "mem auto".
Diffstat (limited to 'gdb/memory-map.c')
-rw-r--r--gdb/memory-map.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/gdb/memory-map.c b/gdb/memory-map.c
new file mode 100644
index 00000000000..01171c10fd0
--- /dev/null
+++ b/gdb/memory-map.c
@@ -0,0 +1,273 @@
+/* Routines for handling XML memory maps provided by target.
+
+ Copyright (C) 2006
+ Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
+
+#include "defs.h"
+#include "memory-map.h"
+#include "gdb_assert.h"
+#include "exceptions.h"
+
+#include "gdb_string.h"
+
+#if !defined(HAVE_LIBEXPAT)
+
+VEC(mem_region_s) *
+parse_memory_map (const char *memory_map)
+{
+ static int have_warned;
+
+ if (!have_warned)
+ {
+ have_warned = 1;
+ warning (_("Can not parse XML memory map; XML support was disabled "
+ "at compile time"));
+ }
+
+ return NULL;
+}
+
+#else /* HAVE_LIBEXPAT */
+
+#include "xml-support.h"
+#include <expat.h>
+
+/* Internal parsing data passed to all Expat callbacks. */
+struct memory_map_parsing_data
+ {
+ VEC(mem_region_s) **memory_map;
+ struct mem_region *currently_parsing;
+ char *character_data;
+ const char *property_name;
+ int capture_text;
+ };
+
+static void
+free_memory_map_parsing_data (void *p_)
+{
+ struct memory_map_parsing_data *p = p_;
+
+ xfree (p->character_data);
+}
+
+/* Callback called by Expat on start of element.
+ DATA_ is pointer to memory_map_parsing_data
+ NAME is the name of element
+ ATTRS is the zero-terminated array of attribute names and
+ attribute values.
+
+ This function handles the following elements:
+ - 'memory' -- creates a new memory region and initializes it
+ from attributes. Sets DATA_.currently_parsing to the new region.
+ - 'properties' -- sets DATA.capture_text. */
+
+static void
+memory_map_start_element (void *data_, const XML_Char *name,
+ const XML_Char **attrs)
+{
+ static const XML_Char *type_names[] = {"ram", "rom", "flash", 0};
+ static int type_values[] = { MEM_RW, MEM_RO, MEM_FLASH };
+ struct memory_map_parsing_data *data = data_;
+ struct gdb_exception ex;
+
+ TRY_CATCH (ex, RETURN_MASK_ERROR)
+ {
+ if (strcmp (name, "memory") == 0)
+ {
+ struct mem_region *r;
+
+ r = VEC_safe_push (mem_region_s, *data->memory_map, NULL);
+ mem_region_init (r);
+
+ r->lo = xml_get_integer_attribute (attrs, "start");
+ r->hi = r->lo + xml_get_integer_attribute (attrs, "length");
+ r->attrib.mode = xml_get_enum_value (attrs, "type", type_names,
+ type_values);
+ r->attrib.blocksize = -1;
+
+ data->currently_parsing = r;
+ }
+ else if (strcmp (name, "property") == 0)
+ {
+ if (!data->currently_parsing)
+ throw_error (XML_PARSE_ERROR,
+ _("memory map: found 'property' element outside 'memory'"));
+
+ data->capture_text = 1;
+
+ data->property_name = xml_get_required_attribute (attrs, "name");
+ }
+ }
+ if (ex.reason < 0)
+ throw_error
+ (ex.error, _("While parsing element %s:\n%s"), name, ex.message);
+}
+
+/* Callback called by Expat on start of element. DATA_ is a pointer
+ to our memory_map_parsing_data. NAME is the name of the element.
+
+ This function handles the following elements:
+ - 'property' -- check that the property name is 'blocksize' and
+ sets DATA->currently_parsing->attrib.blocksize
+ - 'memory' verifies that flash block size is set. */
+
+static void
+memory_map_end_element (void *data_, const XML_Char *name)
+{
+ struct memory_map_parsing_data *data = data_;
+ struct gdb_exception ex;
+
+ TRY_CATCH (ex, RETURN_MASK_ERROR)
+ {
+ if (strcmp (name, "property") == 0)
+ {
+ if (strcmp (data->property_name, "blocksize") == 0)
+ {
+ if (!data->character_data)
+ throw_error (XML_PARSE_ERROR,
+ _("Empty content of 'property' element"));
+ char *end = NULL;
+ data->currently_parsing->attrib.blocksize
+ = strtoul (data->character_data, &end, 0);
+ if (*end != '\0')
+ throw_error (XML_PARSE_ERROR,
+ _("Invalid content of the 'blocksize' property"));
+ }
+ else
+ throw_error (XML_PARSE_ERROR,
+ _("Unknown memory region property: %s"), name);
+
+ data->capture_text = 0;
+ }
+ else if (strcmp (name, "memory") == 0)
+ {
+ if (data->currently_parsing->attrib.mode == MEM_FLASH
+ && data->currently_parsing->attrib.blocksize == -1)
+ throw_error (XML_PARSE_ERROR,
+ _("Flash block size is not set"));
+
+ data->currently_parsing = 0;
+ data->character_data = 0;
+ }
+ }
+ if (ex.reason < 0)
+ throw_error
+ (ex.error, _("while parsing element %s: \n%s"), name, ex.message);
+}
+
+/* Callback called by expat for all character data blocks.
+ DATA_ is the pointer to memory_map_parsing_data.
+ S is the point to character data.
+ LEN is the length of data; the data is not zero-terminated.
+
+ If DATA_->CAPTURE_TEXT is 1, appends this block of characters
+ to DATA_->CHARACTER_DATA. */
+static void
+memory_map_character_data (void *data_, const XML_Char *s,
+ int len)
+{
+ struct memory_map_parsing_data *data = data_;
+ int current_size = 0;
+
+ if (!data->capture_text)
+ return;
+
+ /* Expat interface does not guarantee that a single call to
+ a handler will be made. Actually, one call for each line
+ will be made, and character data can possibly span several
+ lines.
+
+ Take care to realloc the data if needed. */
+ if (!data->character_data)
+ data->character_data = xmalloc (len + 1);
+ else
+ {
+ current_size = strlen (data->character_data);
+ data->character_data = xrealloc (data->character_data,
+ current_size + len + 1);
+ }
+
+ memcpy (data->character_data + current_size, s, len);
+ data->character_data[current_size + len] = '\0';
+}
+
+static void
+clear_result (void *p)
+{
+ VEC(mem_region_s) **result = p;
+ VEC_free (mem_region_s, *result);
+ *result = NULL;
+}
+
+VEC(mem_region_s) *
+parse_memory_map (const char *memory_map)
+{
+ VEC(mem_region_s) *result = NULL;
+ struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
+ struct cleanup *before_deleting_result;
+ struct cleanup *saved;
+ volatile struct gdb_exception ex;
+ int ok = 0;
+
+ struct memory_map_parsing_data data = {};
+
+ XML_Parser parser = XML_ParserCreateNS (NULL, '!');
+ if (parser == NULL)
+ goto out;
+
+ make_cleanup_free_xml_parser (parser);
+ make_cleanup (free_memory_map_parsing_data, &data);
+ /* Note: 'clear_result' will zero 'result'. */
+ before_deleting_result = make_cleanup (clear_result, &result);
+
+ XML_SetElementHandler (parser, memory_map_start_element,
+ memory_map_end_element);
+ XML_SetCharacterDataHandler (parser, memory_map_character_data);
+ XML_SetUserData (parser, &data);
+ data.memory_map = &result;
+
+ TRY_CATCH (ex, RETURN_MASK_ERROR)
+ {
+ if (XML_Parse (parser, memory_map, strlen (memory_map), 1)
+ != XML_STATUS_OK)
+ {
+ enum XML_Error err = XML_GetErrorCode (parser);
+
+ throw_error (XML_PARSE_ERROR, "%s", XML_ErrorString (err));
+ }
+ }
+ if (ex.reason != GDB_NO_ERROR)
+ {
+ if (ex.error == XML_PARSE_ERROR)
+ /* Just report it. */
+ warning (_("Could not parse XML memory map: %s"), ex.message);
+ else
+ throw_exception (ex);
+ }
+ else
+ /* Parsed successfully, don't need to delete the result. */
+ discard_cleanups (before_deleting_result);
+
+ out:
+ do_cleanups (back_to);
+ return result;
+}
+
+#endif /* HAVE_LIBEXPAT */