Explicit locations: introduce address locations

This patch adds support for address locations, of the form "*ADDR".
[Support for address linespecs has been removed/replaced by this "new"
location type.] This patch also converts any existing address locations
from its previous linespec type.

gdb/ChangeLog:

	* breakpoint.c (create_thread_event_breakpoint, init_breakpoint_sal):
	Convert linespec to address location.
	* linespec.c (canonicalize_linespec): Do not handle address
	locations here.
	(convert_address_location_to_sals): New function; contents moved
	from ...
	(convert_linespc_to_sals): ... here.
	(parse_linespec): Remove address locations from linespec grammar.
	Remove handling of address locations.
	(linespec_lex_to_end): Remove handling of address linespecs.
	(event_location_to_sals): Handle ADDRESS_LOCATION.
	(linespec_expression_to_pc): Export.
	* linespec.h (linespec_expression_to_pc): Add declaration.
	* location.c (struct event_location.u) <address>: New member.
	(new_address_location, get_address_location): New functions.
	(copy_event_location, delete_event_location, event_location_to_string)
	(string_to_event_location, event_location_empty_p): Handle address
	locations.
	* location.h (enum event_location_type): Add ADDRESS_LOCATION.
	(new_address_location, get_address_location): Declare.
	* python/py-finishbreakpoint.c (bpfinishpy_init): Convert linespec
	to address location.
	* spu-tdep.c (spu_catch_start): Likewise.

1 files changed, 16 insertions, 1 deletions

diff --git a/gdb/location.h b/gdb/location.h
index d35fecb..7b9741b 100644
--- a/gdb/location.h
+++ b/gdb/location.h
@@ -28,7 +28,10 @@ struct event_location;
 enum event_location_type
 {
   /* A traditional linespec.  */
-  LINESPEC_LOCATION
+  LINESPEC_LOCATION,
+
+  /* An address in the inferior.  */
+  ADDRESS_LOCATION
 };
 
 /* Return the type of the given event location.  */
@@ -57,6 +60,18 @@ extern struct event_location *
 extern const char *
   get_linespec_location (const struct event_location *location);
 
+/* Create a new address location.  The return result is malloc'd
+   and should be freed with delete_event_location.  */
+
+extern struct event_location *
+  new_address_location (CORE_ADDR addr);
+
+/* Return the address location (a CORE_ADDR) of the given event_location
+   (which must be of type ADDRESS_LOCATION).  */
+
+extern CORE_ADDR
+  get_address_location (const struct event_location *location);
+
 /* Free an event location and any associated data.  */
 
 extern void delete_event_location (struct event_location *location);