PR binutils/6483

        * objdump.c (dump_bfd): If the -g option found no STABS or IEEE
        debug information to display, try dumping DWARF information
        instead.
        * rddbg.c (read_debugging_info): Add a parameter to suppress the
        display of a warning message when no debug information is found.
        * budbg.h (read_debugging_info): Update prototype.
        * objcopy.c (copy_object): Continue to allow read_debugging_info
        to produce warning messages.
        * doc/binutils.texi (--debugging): Document new behaviour of the
        -g/--debugging option.

6 files changed, 34 insertions, 13 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 84d7ea1..4ba9c0a 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,17 @@
+2008-06-12  Nick Clifton  <nickc@redhat.com>
+
+	PR binutils/6483
+	* objdump.c (dump_bfd): If the -g option found no STABS or IEEE
+	debug information to display, try dumping DWARF information
+	instead.
+	* rddbg.c (read_debugging_info): Add a parameter to suppress the
+	display of a warning message when no debug information is found.
+	* budbg.h (read_debugging_info): Update prototype.
+	* objcopy.c (copy_object): Continue to allow read_debugging_info
+	to produce warning messages.
+	* doc/binutils.texi (--debugging): Document new behaviour of the
+	-g/--debugging option.
+
 2008-06-10  Ben Elliston  <bje@gnu.org>
 
 	* MAINTAINERS: Remove myself as m68k maintainer.
diff --git a/binutils/budbg.h b/binutils/budbg.h
index a8c99dd..cad6ac7 100644
--- a/binutils/budbg.h
+++ b/binutils/budbg.h
@@ -1,5 +1,5 @@
 /* budbg.c -- Interfaces to the generic debugging information routines.
-   Copyright 1995, 1996, 2002, 2003, 2007 Free Software Foundation, Inc.
+   Copyright 1995, 1996, 2002, 2003, 2007, 2008 Free Software Foundation, Inc.
    Written by Ian Lance Taylor <ian@cygnus.com>.
 
    This file is part of GNU Binutils.
@@ -26,7 +26,7 @@
 
 /* Routine used to read generic debugging information.  */
 
-extern void *read_debugging_info (bfd *, asymbol **, long);
+extern void *read_debugging_info (bfd *, asymbol **, long, bfd_boolean);
 
 /* Routine used to print generic debugging information.  */
 
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index d08c617..2ebf354 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -1693,11 +1693,11 @@ for more information on demangling.
 
 @item -g
 @itemx --debugging
-Display debugging information.  This attempts to parse debugging
-information stored in the file and print it out using a C like syntax.
-Only certain types of debugging information have been implemented.
-Some other types are supported by @command{readelf -w}.
-@xref{readelf}.
+Display debugging information.  This attempts to parse STABS and IEEE
+debugging format information stored in the file and print it out using
+a C like syntax.  If neither of these formats are found this option
+falls back on the @option{-W} option to print any DWARF information in
+the file.
 
 @item -e
 @itemx --debugging-tags
diff --git a/binutils/objcopy.c b/binutils/objcopy.c
index d44114a..49b022a 100644
--- a/binutils/objcopy.c
+++ b/binutils/objcopy.c
@@ -1674,7 +1674,7 @@ copy_object (bfd *ibfd, bfd *obfd)
      have been created, but before their contents are set.  */
   dhandle = NULL;
   if (convert_debugging)
-    dhandle = read_debugging_info (ibfd, isympp, symcount);
+    dhandle = read_debugging_info (ibfd, isympp, symcount, FALSE);
 
   if (strip_symbols == STRIP_DEBUG
       || strip_symbols == STRIP_ALL
diff --git a/binutils/objdump.c b/binutils/objdump.c
index 5a86250..d171d14 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -2937,7 +2937,7 @@ dump_bfd (bfd *abfd)
     {
       void *dhandle;
 
-      dhandle = read_debugging_info (abfd, syms, symcount);
+      dhandle = read_debugging_info (abfd, syms, symcount, TRUE);
       if (dhandle != NULL)
 	{
 	  if (!print_debugging_info (stdout, dhandle, abfd, syms,
@@ -2949,6 +2949,12 @@ dump_bfd (bfd *abfd)
 	      exit_status = 1;
 	    }
 	}
+      /* PR 6483: If there was no STABS or IEEE debug
+	 info in the file, try DWARF instead.  */
+      else if (! dump_dwarf_section_info)
+	{
+	  dump_dwarf (abfd);
+	}
     }
 
   if (syms)
diff --git a/binutils/rddbg.c b/binutils/rddbg.c
index 6d26fee..e21ed6f 100644
--- a/binutils/rddbg.c
+++ b/binutils/rddbg.c
@@ -1,5 +1,5 @@
 /* rddbg.c -- Read debugging information into a generic form.
-   Copyright 1995, 1996, 1997, 2000, 2002, 2003, 2005, 2007
+   Copyright 1995, 1996, 1997, 2000, 2002, 2003, 2005, 2007, 2008
    Free Software Foundation, Inc.
    Written by Ian Lance Taylor <ian@cygnus.com>.
 
@@ -45,7 +45,7 @@ static void free_saved_stabs (void);
    pointer.  */
 
 void *
-read_debugging_info (bfd *abfd, asymbol **syms, long symcount)
+read_debugging_info (bfd *abfd, asymbol **syms, long symcount, bfd_boolean no_messages)
 {
   void *dhandle;
   bfd_boolean found;
@@ -84,8 +84,9 @@ read_debugging_info (bfd *abfd, asymbol **syms, long symcount)
 
   if (! found)
     {
-      non_fatal (_("%s: no recognized debugging information"),
-		 bfd_get_filename (abfd));
+      if (! no_messages)
+	non_fatal (_("%s: no recognized debugging information"),
+		   bfd_get_filename (abfd));
       return NULL;
     }