svn commit: r214355 - in projects/binutils-2.17/contrib/binutils: bfd ld

[Dimitry Andric]

Author: dim
Date: Mon Oct 25 19:43:22 2010
New Revision: 214355
URL: http://svn.freebsd.org/changeset/base/214355

Log:
  Apply commit f6c8fecc6fe3d5532691867a7f27820bb1c426a9 from upstream
  (still under GPLv2 at that time):
  
  Author: H.J. Lu <hjl at lucon.org>
  Date:   Wed Sep 27 04:18:16 2006 +0000
  
  PR ld/3223
  PR ld/3267
  * bfd/elf.c (assign_file_positions_for_non_load_sections): Don't warn
    zero size allocated sections.
  * ld/ldlang.h (lang_output_section_statement_type): Add
    section_relative_symbol.
  * ld/ldlang.c (strip_excluded_output_sections): Don't strip a section
    with a symbol relative to it.
    (lang_size_sections_1): Mark if an output section has a symbol symbol
    relative to it.
  
  This prevents warnings like the following during stripping of debug info
  from kernel modules on i386:
  
  ===> zlib (all)
  ...
  objcopy --only-keep-debug zlib.ko.debug zlib.ko.symbols
  objcopy --strip-debug --add-gnu-debuglink=zlib.ko.symbols zlib.ko.debug zlib.ko
  BFD: zlib.ko: warning: allocated section `.plt' not in segment
  BFD: zlib.ko: warning: allocated section `.got' not in segment

Modified:
  projects/binutils-2.17/contrib/binutils/bfd/elf.c
  projects/binutils-2.17/contrib/binutils/ld/ldlang.c
  projects/binutils-2.17/contrib/binutils/ld/ldlang.h

Modified: projects/binutils-2.17/contrib/binutils/bfd/elf.c
==============================================================================
--- projects/binutils-2.17/contrib/binutils/bfd/elf.c	Mon Oct 25 19:33:45 2010	(r214354)
+++ projects/binutils-2.17/contrib/binutils/bfd/elf.c	Mon Oct 25 19:43:22 2010	(r214355)
@@ -4787,12 +4787,13 @@ assign_file_positions_except_relocs (bfd
 	    hdr->sh_offset = hdr->bfd_section->filepos;
 	  else if ((hdr->sh_flags & SHF_ALLOC) != 0)
 	    {
-	      ((*_bfd_error_handler)
-	       (_("%B: warning: allocated section `%s' not in segment"),
-		abfd,
-		(hdr->bfd_section == NULL
-		 ? "*unknown*"
-		 : hdr->bfd_section->name)));
+	      if (hdr->sh_size != 0)
+		((*_bfd_error_handler)
+		 (_("%B: warning: allocated section `%s' not in segment"),
+		    abfd,
+		    (hdr->bfd_section == NULL
+		     ? "*unknown*" 
+		     : hdr->bfd_section->name)));
 	      if ((abfd->flags & D_PAGED) != 0)
 		off += vma_page_aligned_bias (hdr->sh_addr, off,
 					      bed->maxpagesize);

Modified: projects/binutils-2.17/contrib/binutils/ld/ldlang.c
==============================================================================
--- projects/binutils-2.17/contrib/binutils/ld/ldlang.c	Mon Oct 25 19:33:45 2010	(r214354)
+++ projects/binutils-2.17/contrib/binutils/ld/ldlang.c	Mon Oct 25 19:43:22 2010	(r214355)
@@ -3244,6 +3244,7 @@ strip_excluded_output_sections (void)
 	continue;
 
       exclude = (output_section->rawsize == 0
+		 && !os->section_relative_symbol
 		 && (output_section->flags & SEC_KEEP) == 0
 		 && !bfd_section_removed_from_list (output_bfd,
 						    output_section));
@@ -4442,11 +4443,19 @@ lang_size_sections_1
 	case lang_assignment_statement_enum:
 	  {
 	    bfd_vma newdot = dot;
+	    etree_type *tree = s->assignment_statement.exp;
 
-	    exp_fold_tree (s->assignment_statement.exp,
+	    exp_fold_tree (tree,
 			   output_section_statement->bfd_section,
 			   &newdot);
 
+	    /* This symbol is relative to this section.  */
+	    if ((tree->type.node_class == etree_provided 
+		 || tree->type.node_class == etree_assign)
+		&& (tree->assign.dst [0] != '.'
+		    || tree->assign.dst [1] != '\0'))
+	      output_section_statement->section_relative_symbol = 1;
+
 	    if (!output_section_statement->ignored)
 	      {
 		if (output_section_statement == abs_output_section)

Modified: projects/binutils-2.17/contrib/binutils/ld/ldlang.h
==============================================================================
--- projects/binutils-2.17/contrib/binutils/ld/ldlang.h	Mon Oct 25 19:33:45 2010	(r214354)
+++ projects/binutils-2.17/contrib/binutils/ld/ldlang.h	Mon Oct 25 19:43:22 2010	(r214355)
@@ -155,7 +155,10 @@ typedef struct lang_output_section_state
   enum section_type sectype;
   unsigned int processed : 1;
   unsigned int all_input_readonly : 1;
+  /* If this section should be ignored.  */
   unsigned int ignored : 1; 
+  /* If there is a symbol relative to this section.  */
+  unsigned int section_relative_symbol : 1; 
 } lang_output_section_statement_type;
 
 typedef struct