2007-03-13 H.J. Lu <hongjiu.lu@intel.com>

	PR binutils/3826
	* elf-bfd.h (elf_backend_data): Add elf_osabi.
	(_bfd_elf_set_osabi): New.

	* elf.c (_bfd_elf_set_osabi): New.

	* elf32-hppa.c (elf32_hppa_post_process_headers): Removed.
	(elf_backend_post_process_headers): Defined with
	_bfd_elf_set_osabi.
	(ELF_OSABI): Properly defined for each target.

	* elf32-i370.c (i370_elf_post_process_headers): Removed.
	(ELF_OSABI): Defined.
	(elf_backend_post_process_headers): Defined with
	_bfd_elf_set_osabi.

	* elf32-i386.c (ELF_OSABI): Defined to ELFOSABI_FREEBSD for
	freebsd.
	(elf_i386_post_process_headers): Set EI_OSABI with elf_osabi.

	* elf32-msp430.c (elf32_msp430_post_process_headers): Removed.
	(ELF_OSABI): Defined.
	(elf_backend_post_process_headers): Defined with
	_bfd_elf_set_osabi.

	* elf64-alpha.c (ELF_OSABI): Defined to ELFOSABI_FREEBSD for
	freebsd.
	(elf64_alpha_fbsd_post_process_headers): Set EI_OSABI with
	elf_osabi.

	* elf64-hppa.c (elf64_hppa_post_process_headers): Set EI_OSABI
	with elf_osabi.
	(ELF_OSABI): Properly defined for each target.
	(elf_backend_post_process_headers): Defined with
	_bfd_elf_set_osabi for Linux.

	* elf64-sparc.c (elf64_sparc_fbsd_post_process_headers): Removed.
	(ELF_OSABI): Defined to ELFOSABI_FREEBSD for freebsd.
	(elf_backend_post_process_headers): Defined with
	_bfd_elf_set_osabi.

	* elf64-x86-64.c (elf64_x86_64_fbsd_post_process_headers): Removed.
	(ELF_OSABI): Defined to ELFOSABI_FREEBSD for freebsd.
	(elf_backend_post_process_headers): Defined with
	_bfd_elf_set_osabi.

	* elfcode.h (elf_object_p): Match the ELFOSABI_NONE ELF target
	with any ELF target of the compatible machine for which we do not
	have a specific backend.

	* elfxx-ia64.c (elfNN_hpux_post_process_headers): Set EI_OSABI
	with elf_osabi.

	* elfxx-target.h (ELF_OSABI): Default to ELFOSABI_NONE.
	(elfNN_bed): Initialize elf_osabi with ELF_OSABI.

1 files changed, 45 insertions, 4 deletions

diff --git a/bfd/elfcode.h b/bfd/elfcode.h
index 04c2d914b0..3c295502df 100644
--- a/bfd/elfcode.h
+++ b/bfd/elfcode.h
@@ -500,6 +500,8 @@ elf_object_p (bfd *abfd)
   struct bfd_preserve preserve;
   asection *s;
   bfd_size_type amt;
+  const bfd_target *target;
+  const bfd_target * const *target_ptr;
 
   preserve.marker = NULL;
 
@@ -543,10 +545,12 @@ elf_object_p (bfd *abfd)
   if (!bfd_preserve_save (abfd, &preserve))
     goto got_no_match;
 
+  target = abfd->xvec;
+
   /* Allocate an instance of the elf_obj_tdata structure and hook it up to
      the tdata pointer in the bfd.  */
 
-  if (! (*abfd->xvec->_bfd_set_format[bfd_object]) (abfd))
+  if (! (*target->_bfd_set_format[bfd_object]) (abfd))
     goto got_no_match;
   preserve.marker = elf_tdata (abfd);
 
@@ -586,8 +590,6 @@ elf_object_p (bfd *abfd)
       && (ebd->elf_machine_alt2 == 0
 	  || i_ehdrp->e_machine != ebd->elf_machine_alt2))
     {
-      const bfd_target * const *target_ptr;
-
       if (ebd->elf_machine_code != EM_NONE)
 	goto got_wrong_format_error;
 
@@ -628,6 +630,45 @@ elf_object_p (bfd *abfd)
 	goto got_no_match;
     }
 
+  if (ebd->elf_machine_code != EM_NONE
+      && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi)
+    {
+      if (ebd->elf_osabi != ELFOSABI_NONE)
+	goto got_wrong_format_error;
+
+      /* This is an ELFOSABI_NONE ELF target.  Let it match any ELF
+	 target of the compatible machine for which we do not have a
+	 backend with matching ELFOSABI.  */
+      for (target_ptr = bfd_target_vector;
+	   *target_ptr != NULL;
+	   target_ptr++)
+	{
+	  const struct elf_backend_data *back;
+
+	  /* Skip this target and targets with incompatible byte
+	     order.  */
+	  if (*target_ptr == target
+	      || (*target_ptr)->flavour != bfd_target_elf_flavour
+	      || (*target_ptr)->byteorder != target->byteorder
+	      || ((*target_ptr)->header_byteorder
+		  != target->header_byteorder))
+	    continue;
+
+	  back = (const struct elf_backend_data *) (*target_ptr)->backend_data;
+	  if (back->elf_osabi == i_ehdrp->e_ident[EI_OSABI]
+	      && (back->elf_machine_code == i_ehdrp->e_machine
+		  || (back->elf_machine_alt1 != 0
+		      && back->elf_machine_alt1 == i_ehdrp->e_machine)
+		  || (back->elf_machine_alt2 != 0
+		      && back->elf_machine_alt2 == i_ehdrp->e_machine)))
+	    {
+	      /* target_ptr is an ELF backend which matches this
+		 object file, so reject the ELFOSABI_NONE ELF target.  */
+	      goto got_wrong_format_error;
+	    }
+	}
+    }
+
   if (i_ehdrp->e_shoff != 0)
     {
       bfd_signed_vma where = i_ehdrp->e_shoff;
@@ -848,7 +889,7 @@ elf_object_p (bfd *abfd)
     }
 
   bfd_preserve_finish (abfd, &preserve);
-  return abfd->xvec;
+  return target;
 
  got_wrong_format_error:
   /* There is way too much undoing of half-known state here.  The caller,