[RFA] findvar.c: support LOC_BASEREG[_ARG] on Harvard archs

[Nick Duffek <nsd@redhat.com>]

Hi,

At the moment, GDB doesn't apply the necessary POINTER_TO_ADDRESS
translation to the base register value used for finding LOC_BASEREG and
LOC_BASEREG_ARG variables.

This patch applies that translation.  Okay to apply?

ChangeLog:

	* findvar.c (read_var_value): Filter LOC_BASEREG and
	LOC_BASEREG_ARG register values through POINTER_TO_ADDRESS.

Nick Duffek
<nsd@redhat.com>

[patch follows]

Index: gdb/findvar.c
===================================================================
diff -up gdb/findvar.c gdb/findvar.c
--- gdb/findvar.c	Mon Jul 16 12:41:21 2001
+++ gdb/findvar.c	Mon Jul 16 12:39:40 2001
@@ -612,9 +612,10 @@ addresses have not been bound by the dyn
     case LOC_BASEREG_ARG:
       {
 	char *buf = (char*) alloca (MAX_REGISTER_RAW_SIZE);
+	memset (buf, 0, MAX_REGISTER_RAW_SIZE);
 	get_saved_register (buf, NULL, NULL, frame, SYMBOL_BASEREG (var),
 			    NULL);
-	addr = extract_address (buf, REGISTER_RAW_SIZE (SYMBOL_BASEREG (var)));
+	addr = POINTER_TO_ADDRESS (builtin_type_void_data_ptr, buf);
 	addr += SYMBOL_VALUE (var);
 	break;
       }