Conditionalise the embedded relocs feature on the m68*-*-elf target

1 files changed, 117 insertions, 78 deletions

diff --git a/ld/emultempl/m68kelf.em b/ld/emultempl/m68kelf.em
index a5e0373..7185080 100644
--- a/ld/emultempl/m68kelf.em
+++ b/ld/emultempl/m68kelf.em
@@ -17,76 +17,91 @@
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
 
-# This file is sourced from elf32.em, and defines extra m68k ELF
-# specific routines.
-#
+# This file is sourced from elf32.em, and defines some extra routines for m68k
+# embedded systems using ELF and for some other systems using m68k ELF.  While
+# it is sourced from elf32.em for all m68k ELF configurations, here we include
+# only the features we want depending on the configuration.
+
+case ${target} in
+  m68*-*-elf)
+    echo "#define SUPPORT_EMBEDDED_RELOCS" >>e${EMULATION_NAME}.c
+    ;;
+esac
+
 cat >>e${EMULATION_NAME}.c <<EOF
 
-static void m68k_elf_after_open PARAMS((void));
+static void m68k_elf_after_open PARAMS ((void));
+#ifdef SUPPORT_EMBEDDED_RELOCS
 static void check_sections PARAMS ((bfd *, asection *, PTR));
+#endif
 static void m68k_elf_after_allocation PARAMS ((void));
 
-/* This function is run after all the input files have been opened.
-   We create a .emreloc section for each input file with a non zero
-   .data section.  The BFD backend will fill in these sections with
-   magic numbers which can be used to relocate the data section at run
-   time.  */
+/* This function is run after all the input files have been opened.  */
 
 static void
 m68k_elf_after_open ()
 {
-  bfd *abfd;
-
   /* Call the standard elf routine.  */
   gld${EMULATION_NAME}_after_open ();
 
-  if (! command_line.embedded_relocs
-      || link_info.relocateable)
-    return;
-
-  for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
+#ifdef SUPPORT_EMBEDDED_RELOCS
+  if (command_line.embedded_relocs
+      && (! link_info.relocateable))
     {
-      asection *datasec;
-
-      /* As first-order business, make sure that each input BFD is ELF. It
-         better be, as we are directly calling a ELF backend function.  */
-      if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
-	einfo ("%F%B: all input objects must be ELF for --embedded-relocs\n");
-
-      datasec = bfd_get_section_by_name (abfd, ".data");
-
-      /* Note that we assume that the reloc_count field has already
-         been set up.  We could call bfd_get_reloc_upper_bound, but
-         that returns the size of a memory buffer rather than a reloc
-         count.  We do not want to call bfd_canonicalize_reloc,
-         because although it would always work it would force us to
-         read in the relocs into BFD canonical form, which would waste
-         a significant amount of time and memory.  */
-      if (datasec != NULL && datasec->reloc_count > 0)
+      bfd *abfd;
+
+      /* In the embedded relocs mode we create a .emreloc section for each
+	 input file with a nonzero .data section.  The BFD backend will fill in
+	 these sections with magic numbers which can be used to relocate the
+	 data section at run time.  */
+      for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
 	{
-	  asection *relsec;
-
-	  relsec = bfd_make_section (abfd, ".emreloc");
-	  if (relsec == NULL
-	      || ! bfd_set_section_flags (abfd, relsec,
-					  (SEC_ALLOC
-					   | SEC_LOAD
-					   | SEC_HAS_CONTENTS
-					   | SEC_IN_MEMORY))
-	      || ! bfd_set_section_alignment (abfd, relsec, 2)
-	      || ! bfd_set_section_size (abfd, relsec,
-					 datasec->reloc_count * 12))
-	    einfo ("%F%B: can not create .emreloc section: %E\n");
+	  asection *datasec;
+
+	  /* As first-order business, make sure that each input BFD is either
+	     COFF or ELF.  We need to call a special BFD backend function to
+	     generate the embedded relocs, and we have such functions only for
+	     COFF and ELF.  */
+	  if (bfd_get_flavour (abfd) != bfd_target_coff_flavour
+	      && bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+	    einfo ("%F%B: all input objects must be COFF or ELF for --embedded-relocs\n");
+
+	  datasec = bfd_get_section_by_name (abfd, ".data");
+
+	  /* Note that we assume that the reloc_count field has already
+	     been set up.  We could call bfd_get_reloc_upper_bound, but
+	     that returns the size of a memory buffer rather than a reloc
+	     count.  We do not want to call bfd_canonicalize_reloc,
+	     because although it would always work it would force us to
+	     read in the relocs into BFD canonical form, which would waste
+	     a significant amount of time and memory.  */
+	  if (datasec != NULL && datasec->reloc_count > 0)
+	    {
+	      asection *relsec;
+
+	      relsec = bfd_make_section (abfd, ".emreloc");
+	      if (relsec == NULL
+		  || ! bfd_set_section_flags (abfd, relsec,
+					      (SEC_ALLOC
+					       | SEC_LOAD
+					       | SEC_HAS_CONTENTS
+					       | SEC_IN_MEMORY))
+		  || ! bfd_set_section_alignment (abfd, relsec, 2)
+		  || ! bfd_set_section_size (abfd, relsec,
+					     datasec->reloc_count * 12))
+		einfo ("%F%B: can not create .emreloc section: %E\n");
+	    }
+
+	  /* Double check that all other data sections are empty, as is
+	     required for embedded PIC code.  */
+	  bfd_map_over_sections (abfd, check_sections, (PTR) datasec);
 	}
-
-      /* Double check that all other data sections are empty, as is
-         required for embedded PIC code.  */
-      bfd_map_over_sections (abfd, check_sections, (PTR) datasec);
     }
+#endif /* SUPPORT_EMBEDDED_RELOCS */
 }
 
+#ifdef SUPPORT_EMBEDDED_RELOCS
 /* Check that of the data sections, only the .data section has
    relocs.  This is called via bfd_map_over_sections.  */
 
@@ -103,47 +118,71 @@ check_sections (abfd, sec, datasec)
 	   abfd, bfd_get_section_name (abfd, sec));
 }
 
+#endif /* SUPPORT_EMBEDDED_RELOCS */
+
 /* This function is called after the section sizes and offsets have
-   been set.  If we are generating embedded relocs, it calls a special
-   BFD backend routine to do the work.  */
+   been set.  */
 
 static void
 m68k_elf_after_allocation ()
 {
-  bfd *abfd;
-
   /* Call the standard elf routine.  */
   gld${EMULATION_NAME}_before_allocation ();
 
-  if (! command_line.embedded_relocs
-      || link_info.relocateable)
-    return;
-
-  for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
+#ifdef SUPPORT_EMBEDDED_RELOCS
+  if (command_line.embedded_relocs
+      && (! link_info.relocateable))
     {
-      asection *datasec, *relsec;
-      char *errmsg;
-
-      datasec = bfd_get_section_by_name (abfd, ".data");
-
-      if (datasec == NULL || datasec->reloc_count == 0)
-	continue;
-
-      relsec = bfd_get_section_by_name (abfd, ".emreloc");
-      ASSERT (relsec != NULL);
+      bfd *abfd;
 
-      if (! bfd_m68k_elf32_create_embedded_relocs (abfd, &link_info,
-						   datasec, relsec,
-						   &errmsg))
+      /* If we are generating embedded relocs, call a special BFD backend
+	 routine to do the work.  */
+      for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
 	{
-	  if (errmsg == NULL)
-	    einfo ("%B%X: can not create runtime reloc information: %E\n",
-		   abfd);
+	  asection *datasec, *relsec;
+	  char *errmsg;
+
+	  datasec = bfd_get_section_by_name (abfd, ".data");
+
+	  if (datasec == NULL || datasec->reloc_count == 0)
+	    continue;
+
+	  relsec = bfd_get_section_by_name (abfd, ".emreloc");
+	  ASSERT (relsec != NULL);
+
+	  if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
+	    {
+	      if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info,
+							  datasec, relsec,
+							  &errmsg))
+		{
+		  if (errmsg == NULL)
+		    einfo ("%B%X: can not create runtime reloc information: %E\n",
+			   abfd);
+		  else
+		    einfo ("%X%B: can not create runtime reloc information: %s\n",
+			   abfd, errmsg);
+		}
+	    }
+	  else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+	    {
+	      if (! bfd_m68k_elf32_create_embedded_relocs (abfd, &link_info,
+							   datasec, relsec,
+							   &errmsg))
+		{
+		  if (errmsg == NULL)
+		    einfo ("%B%X: can not create runtime reloc information: %E\n",
+			   abfd);
+		  else
+		    einfo ("%X%B: can not create runtime reloc information: %s\n",
+			   abfd, errmsg);
+		}
+	    }
 	  else
-	    einfo ("%X%B: can not create runtime reloc information: %s\n",
-		   abfd, errmsg);
+	    abort ();
 	}
     }
+#endif /* SUPPORT_EMBEDDED_RELOCS */
 }
 
 EOF