bfd:

	* elfxx-mips.c (mips_elf_merge_obj_attributes): New.
	(_bfd_mips_elf_merge_private_bfd_data): Call it.

binutils:
	* readelf.c (display_mips_gnu_attribute): New.
	(process_mips_specific): Call process_attributes.

include/elf:
	* mips.h (Tag_GNU_MIPS_ABI_FP): Define.

ld/testsuite:
	* ld-mips-elf/attr-gnu-4-0.s, ld-mips-elf/attr-gnu-4-00.d,
	ld-mips-elf/attr-gnu-4-01.d, ld-mips-elf/attr-gnu-4-02.d,
	ld-mips-elf/attr-gnu-4-03.d, ld-mips-elf/attr-gnu-4-1.s,
	ld-mips-elf/attr-gnu-4-10.d, ld-mips-elf/attr-gnu-4-11.d,
	ld-mips-elf/attr-gnu-4-12.d, ld-mips-elf/attr-gnu-4-13.d,
	ld-mips-elf/attr-gnu-4-14.d, ld-mips-elf/attr-gnu-4-2.s,
	ld-mips-elf/attr-gnu-4-20.d, ld-mips-elf/attr-gnu-4-21.d,
	ld-mips-elf/attr-gnu-4-22.d, ld-mips-elf/attr-gnu-4-23.d,
	ld-mips-elf/attr-gnu-4-3.s, ld-mips-elf/attr-gnu-4-30.d,
	ld-mips-elf/attr-gnu-4-31.d, ld-mips-elf/attr-gnu-4-32.d,
	ld-mips-elf/attr-gnu-4-33.d, ld-mips-elf/attr-gnu-4-4.s,
	ld-mips-elf/attr-gnu-4-41.d: New.
	* ld-mips-elf/mips-elf.exp: Run these new tests.

1 files changed, 109 insertions, 0 deletions

diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c
index dafd607..d368d41 100644
--- a/bfd/elfxx-mips.c
+++ b/bfd/elfxx-mips.c
@@ -10960,6 +10960,112 @@ mips_32bit_flags_p (flagword flags)
 }
 
 
+/* Merge object attributes from IBFD into OBFD.  Raise an error if
+   there are conflicting attributes.  */
+static bfd_boolean
+mips_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
+{
+  obj_attribute *in_attr;
+  obj_attribute *out_attr;
+
+  if (!elf_known_obj_attributes_proc (obfd)[0].i)
+    {
+      /* This is the first object.  Copy the attributes.  */
+      _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
+      /* Use the Tag_null value to indicate the attributes have been
+	 initialized.  */
+      elf_known_obj_attributes_proc (obfd)[0].i = 1;
+
+      return TRUE;
+    }
+
+  /* Check for conflicting Tag_GNU_MIPS_ABI_FP attributes and merge
+     non-conflicting ones.  */
+  in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
+  out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
+  if (in_attr[Tag_GNU_MIPS_ABI_FP].i != out_attr[Tag_GNU_MIPS_ABI_FP].i)
+    {
+      out_attr[Tag_GNU_MIPS_ABI_FP].type = 1;
+      if (out_attr[Tag_GNU_MIPS_ABI_FP].i == 0)
+	out_attr[Tag_GNU_MIPS_ABI_FP].i = in_attr[Tag_GNU_MIPS_ABI_FP].i;
+      else if (in_attr[Tag_GNU_MIPS_ABI_FP].i == 0)
+	;
+      else if (in_attr[Tag_GNU_MIPS_ABI_FP].i > 3)
+	_bfd_error_handler
+	  (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
+	   in_attr[Tag_GNU_MIPS_ABI_FP].i);
+      else if (out_attr[Tag_GNU_MIPS_ABI_FP].i > 3)
+	_bfd_error_handler
+	  (_("Warning: %B uses unknown floating point ABI %d"), obfd,
+	   out_attr[Tag_GNU_MIPS_ABI_FP].i);
+      else
+	switch (out_attr[Tag_GNU_MIPS_ABI_FP].i)
+	  {
+	  case 1:
+	    switch (in_attr[Tag_GNU_MIPS_ABI_FP].i)
+	      {
+	      case 2:
+		_bfd_error_handler
+		  (_("Warning: %B uses -msingle-float, %B uses -mdouble-float"),
+		   obfd, ibfd);
+
+	      case 3:
+		_bfd_error_handler
+		  (_("Warning: %B uses hard float, %B uses soft float"),
+		   obfd, ibfd);
+		break;
+
+	      default:
+		abort ();
+	      }
+	    break;
+
+	  case 2:
+	    switch (in_attr[Tag_GNU_MIPS_ABI_FP].i)
+	      {
+	      case 1:
+		_bfd_error_handler
+		  (_("Warning: %B uses -msingle-float, %B uses -mdouble-float"),
+		   ibfd, obfd);
+
+	      case 3:
+		_bfd_error_handler
+		  (_("Warning: %B uses hard float, %B uses soft float"),
+		   obfd, ibfd);
+		break;
+
+	      default:
+		abort ();
+	      }
+	    break;
+
+	  case 3:
+	    switch (in_attr[Tag_GNU_MIPS_ABI_FP].i)
+	      {
+	      case 1:
+	      case 2:
+		_bfd_error_handler
+		  (_("Warning: %B uses hard float, %B uses soft float"),
+		   ibfd, obfd);
+		break;
+
+	      default:
+		abort ();
+	      }
+	    break;
+
+	  default:
+	    abort ();
+	  }
+    }
+
+  /* Merge Tag_compatibility attributes and any common GNU ones.  */
+  _bfd_elf_merge_object_attributes (ibfd, obfd);
+
+  return TRUE;
+}
+
 /* Merge backend specific data from an object file to the output
    object file when linking.  */
 
@@ -10993,6 +11099,9 @@ _bfd_mips_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
       return FALSE;
     }
 
+  if (!mips_elf_merge_obj_attributes (ibfd, obfd))
+    return FALSE;
+
   new_flags = elf_elfheader (ibfd)->e_flags;
   elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER;
   old_flags = elf_elfheader (obfd)->e_flags;