* object.cc (Sized_relobj::do_layout): Don't get confused if

[deliverable/binutils-gdb.git] / gdb / printcmd.c

diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index dd66f1973f892ee3a74772d2f3f80793242c4349..88db08b01cef02e80944bd79e5f0aa7db0b0a2b3 100644 (file)
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -2,7 +2,7 @@
 
    Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
    1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-   2008, 2009 Free Software Foundation, Inc.
+   2008, 2009, 2010 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -49,6 +49,7 @@
 #include "solib.h"
 #include "parser-defs.h"
 #include "charset.h"
+#include "arch-utils.h"
 
 #ifdef TUI
 #include "tui/tui.h"           /* For tui_active et.al.   */
@@ -1606,6 +1607,20 @@ do_one_display (struct display *d)
   if (d->enabled_p == 0)
     return;
 
+  /* The expression carries the architecture that was used at parse time.
+     This is a problem if the expression depends on architecture features
+     (e.g. register numbers), and the current architecture is now different.
+     For example, a display statement like "display/i $pc" is expected to
+     display the PC register of the current architecture, not the arch at
+     the time the display command was given.  Therefore, we re-parse the
+     expression if the current architecture has changed.  */
+  if (d->exp != NULL && d->exp->gdbarch != get_current_arch ())
+    {
+      xfree (d->exp);
+      d->exp = NULL;
+      d->block = NULL;
+    }
+
   if (d->exp == NULL)
     {
       volatile struct gdb_exception ex;