PR 1150

* readelf.c (get_mips_symbol_other): New function.
  (get_symbol_other): New function.
  (process_symbol_table): Call get_symbol_other() to get a description of the
    st_other field if it contains more information than just the visibility.
* elfxx-mips.c (mips_elf_calculate_relocation): Ignore an undefined symbol if
    it is optional.
  (_bfd_mips_elf_merge_symbol_attribute): Make sure that the optional flag is
    merged as well as the visibility.
* elfxx-mips.h (_bfd_mips_elf_merge_symbol_attribute): Prototype.
  (elf_backend_merge_symbol_attribute): Define.
* mips.h (STO_OPTIONAL): Define.
  (ELF_MIPS_IS_OPTIONAL): Define.

bfd/ChangeLog

@@ -1,3 +1,13 @@
+2005-11-11  Nick Clifton  <nickc@redhat.com>
+
+	PR 1150
+	* elfxx-mips.c (mips_elf_calculate_relocation): Ignore an
+	undefined symbol if it is optional.
+	(_bfd_mips_elf_merge_symbol_attribute): Make sure that the
+	optional flag is merged as well as the visibility.
+	* elfxx-mips.h (_bfd_mips_elf_merge_symbol_attribute): Prototype.
+	(elf_backend_merge_symbol_attribute): Define.
+
 2005-11-08  Nathan Sidwell  <nathan@codesourcery.com>
 
 	Add ms2 support

bfd/elfxx-mips.c

@@ -3792,6 +3792,17 @@ mips_elf_calculate_relocation (bfd *abfd, bfd *input_bfd,
 	  BFD_ASSERT (bfd_get_section_by_name (abfd, ".dynamic") == NULL);
 	  symbol = 0;
 	}
+      else if (ELF_MIPS_IS_OPTIONAL (h->root.other))
+	{
+	  /* This is an optional symbol - an Irix specific extension to the
+	     ELF spec.  Ignore it for now.
+	     XXX - FIXME - there is more to the spec for OPTIONAL symbols
+	     than simply ignoring them, but we do not handle this for now.
+	     For information see the "64-bit ELF Object File Specification"
+	     which is available from here:
+	     http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf  */
+	  symbol = 0;
+	}
       else
 	{
 	  if (! ((*info->callbacks->undefined_symbol)
@@ -8867,8 +8878,7 @@ _bfd_elf_mips_get_relocated_section_contents
 		case bfd_reloc_undefined:
 		  if (!((*link_info->callbacks->undefined_symbol)
 			(link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
-			 input_bfd, input_section, (*parent)->address,
-			 TRUE)))
+			 input_bfd, input_section, (*parent)->address, TRUE)))
 		    goto error_return;
 		  break;
 		case bfd_reloc_dangerous:
@@ -9994,3 +10004,16 @@ const struct bfd_elf_special_section _bfd_mips_elf_special_sections[] =
   { ".ucode",  6,  0, SHT_MIPS_UCODE, 0 },
   { NULL,      0,  0, 0,              0 }
 };
+
+/* Ensure that the STO_OPTIONAL flag is copied into h->other,
+   even if this is not a defintion of the symbol.  */
+void
+_bfd_mips_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
+				      const Elf_Internal_Sym *isym,
+				      bfd_boolean definition,
+				      bfd_boolean dynamic ATTRIBUTE_UNUSED)
+{
+  if (! definition
+      && ELF_MIPS_IS_OPTIONAL (isym->st_other))
+    h->other |= STO_OPTIONAL;
+}

bfd/elfxx-mips.h

@@ -127,6 +127,8 @@ extern bfd_boolean _bfd_mips_relax_section
   (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
 extern bfd_vma _bfd_mips_elf_sign_extend
   (bfd_vma, int);
+extern void _bfd_mips_elf_merge_symbol_attribute
+  (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean);
 
 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
 
@@ -134,3 +136,4 @@ extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
   _bfd_mips_elf_name_local_section_symbols
 #define elf_backend_special_sections _bfd_mips_elf_special_sections
 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size
+#define elf_backend_merge_symbol_attribute  _bfd_mips_elf_merge_symbol_attribute

binutils/ChangeLog

@@ -1,3 +1,12 @@
+2005-11-11  Nick Clifton  <nickc@redhat.com>
+
+	PR 1150
+	* readelf.c (get_mips_symbol_other): New function.
+	(get_symbol_other): New function.
+	(process_symbol_table): Call get_symbol_other() to get a
+	description of the st_other field if it contains more information
+	than just the visibility.
+
 2005-11-07  Steve Ellcey  <sje@cup.hp.com>
 
 	* configure: Regenerate after modifying bfd/warning.m4.

binutils/readelf.c

@@ -6689,6 +6689,41 @@ get_symbol_visibility (unsigned int visibility)
     }
 }
 
+static const char *
+get_mips_symbol_other (unsigned int other)
+{
+  switch (other)
+    {
+    case STO_OPTIONAL:  return "OPTIONAL";
+    case STO_MIPS16:    return "MIPS16";
+    default:      	return NULL;
+    }
+}
+
+static const char *
+get_symbol_other (unsigned int other)
+{
+  const char * result = NULL;
+  static char buff [32];
+
+  if (other == 0)
+    return "";
+
+  switch (elf_header.e_machine)
+    {
+    case EM_MIPS:
+      result = get_mips_symbol_other (other);
+    default:
+      break;
+    }
+
+  if (result)
+    return result;
+
+  snprintf (buff, sizeof buff, _("<other>: %x"), other);
+  return buff;
+}
+
 static const char *
 get_symbol_index_type (unsigned int type)
 {
@@ -6851,6 +6886,11 @@ process_symbol_table (FILE *file)
 	      printf ("  %6s", get_symbol_type (ELF_ST_TYPE (psym->st_info)));
 	      printf (" %6s",  get_symbol_binding (ELF_ST_BIND (psym->st_info)));
 	      printf (" %3s",  get_symbol_visibility (ELF_ST_VISIBILITY (psym->st_other)));
+	      /* Check to see if any other bits in the st_other field are set.
+	         Note - displaying this information disrupts the layout of the
+	         table being generated, but for the moment this case is very rare.  */
+	      if (psym->st_other ^ ELF_ST_VISIBILITY (psym->st_other))
+		printf (" [%s] ", get_symbol_other (psym->st_other ^ ELF_ST_VISIBILITY (psym->st_other)));
 	      printf (" %3.3s ", get_symbol_index_type (psym->st_shndx));
 	      if (VALID_DYNAMIC_NAME (psym->st_name))
 		print_symbol (25, GET_DYNAMIC_NAME (psym->st_name));
@@ -6918,6 +6958,11 @@ process_symbol_table (FILE *file)
 	      printf (" %-7s", get_symbol_type (ELF_ST_TYPE (psym->st_info)));
 	      printf (" %-6s", get_symbol_binding (ELF_ST_BIND (psym->st_info)));
 	      printf (" %-3s", get_symbol_visibility (ELF_ST_VISIBILITY (psym->st_other)));
+	      /* Check to see if any other bits in the st_other field are set.
+	         Note - displaying this information disrupts the layout of the
+	         table being generated, but for the moment this case is very rare.  */
+	      if (psym->st_other ^ ELF_ST_VISIBILITY (psym->st_other))
+		printf (" [%s] ", get_symbol_other (psym->st_other ^ ELF_ST_VISIBILITY (psym->st_other)));
 	      printf (" %4s ", get_symbol_index_type (psym->st_shndx));
 	      print_symbol (25, psym->st_name < strtab_size
 			    ? strtab + psym->st_name : "<corrupt>");

include/elf/ChangeLog

@@ -1,3 +1,9 @@
+2005-11-11  Nick Clifton  <nickc@redhat.com>
+
+	PR 1150
+	* mips.h (STO_OPTIONAL): Define.
+	(ELF_MIPS_IS_OPTIONAL): Define.
+
 2005-09-30  Catherine Moore  <clm@cm00re.com>
 
 	* bfin.h: New file.

include/elf/mips.h

@@ -718,6 +718,13 @@ extern void bfd_mips_elf32_swap_reginfo_out
 
 /* This value is used for a mips16 .text symbol.  */
 #define STO_MIPS16		0xf0
+
+/* This bit is used on Irix to indicate a symbol whose definition
+   is optional - if, at final link time, it cannot be found, no
+   error message should be produced.  */
+#define STO_OPTIONAL		(1 << 2)
+/* A macro to examine the STO_OPTIONAL bit.  */
+#define ELF_MIPS_IS_OPTIONAL(other)	((other) & STO_OPTIONAL)
 
 /* The 64-bit MIPS ELF ABI uses an unusual reloc format.  Each
    relocation entry specifies up to three actual relocations, all at