See http://sources.redhat.com/ml/binutils/2004-08/msg00256.html

Date: Fri, 20 Aug 2004 21:13:43 -0400
From: Daniel Jacobowitz <drow at false dot org>
To: binutils at sources dot redhat dot com
Subject: Re: Handle SEC_LINK_DUPLICATES_SAME_CONTENTS for arm-linux
Message-ID: <20040821011342.GA30319@nevyn.them.org>
Mail-Followup-To: binutils at sources dot redhat dot com
References: <20040818145518.GA9774@nevyn.them.org> <20040819055040.GA11820@lucon.org> <20040819080034.GE21716@bubble.modra.org> <20040820173240.GA17678@nevyn.them.org> <20040821003737.GB16016@bubble.modra.org>
In-Reply-To: <20040821003737 dot GB16016 at bubble dot modra dot org>

On Sat, Aug 21, 2004 at 10:07:38AM +0930, Alan Modra wrote:
> On Fri, Aug 20, 2004 at 01:32:40PM -0400, Daniel Jacobowitz wrote:
> > Thanks.  How's this?
> 
> As you might have guessed from my rather slack review of your previous
> patch, I trust you enough to give the OK without proper review.  But
> since you asked...  :)

Checked in as so.

-- 
Daniel Jacobowitz

2004-08-20  Daniel Jacobowitz  <dan@debian.org>

	* elflink.c (_bfd_elf_section_already_linked): Handle
	SEC_LINK_DUPLICATES_SAME_CONTENTS.

Index: elflink.c
===================================================================
RCS file: /big/fsf/rsync/src-cvs/src/bfd/elflink.c,v
retrieving revision 1.97
diff -u -p -r1.97 elflink.c
--- binutils/bfd/elflink.c	18 Aug 2004 02:45:42 -0000	1.97
+++ binutils/bfd/elflink.c	21 Aug 2004 00:59:08 -0000
@@ -9366,6 +9366,36 @@ _bfd_elf_section_already_linked (bfd *ab
 		  (_("%B: duplicate section `%A' has different size\n"),
 		   abfd, sec);
 	      break;
+
+	    case SEC_LINK_DUPLICATES_SAME_CONTENTS:
+	      if (sec->size != l->sec->size)
+		(*_bfd_error_handler)
+		  (_("%B: duplicate section `%A' has different size\n"),
+		   abfd, sec);
+	      else if (sec->size != 0)
+		{
+		  bfd_byte *sec_contents, *l_sec_contents;
+
+		  if (!bfd_malloc_and_get_section (abfd, sec, &sec_contents))
+		    (*_bfd_error_handler)
+		      (_("%B: warning: could not read contents of section `%A'\n"),
+		       abfd, sec);
+		  else if (!bfd_malloc_and_get_section (l->sec->owner, l->sec,
+							&l_sec_contents))
+		    (*_bfd_error_handler)
+		      (_("%B: warning: could not read contents of section `%A'\n"),
+		       l->sec->owner, l->sec);
+		  else if (memcmp (sec_contents, l_sec_contents, sec->size) != 0)
+		    (*_bfd_error_handler)
+		      (_("%B: warning: duplicate section `%A' has different contents\n"),
+		       abfd, sec);
+
+		  if (sec_contents)
+		    free (sec_contents);
+		  if (l_sec_contents)
+		    free (l_sec_contents);
+		}
+	      break;
 	    }
 
 	  /* Set the output_section field so that lang_add_section