PR 6844

[binutils-gdb.git] / bfd / aoutx.h

diff --git a/bfd/aoutx.h b/bfd/aoutx.h
index af7d45be3a7b10254f1426aad3ff3db106dfc8dc..b469b77c6263e38cb336541c8d31e43c16ca9b9a 100644 (file)
--- a/bfd/aoutx.h
+++ b/bfd/aoutx.h
@@ -1294,6 +1294,8 @@ aout_get_external_symbols (bfd *abfd)
       bfd_size_type amt;
 
       count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
+      if (count == 0)
+       return TRUE;            /* Nothing to do.  */
 
 #ifdef USE_MMAP
       if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
@@ -1306,7 +1308,7 @@ aout_get_external_symbols (bfd *abfd)
         later on.  If we put them on the objalloc it might not be
         possible to free them.  */
       syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE);
-      if (syms == NULL && count != 0)
+      if (syms == NULL)
        return FALSE;
 
       amt = exec_hdr (abfd)->a_syms;
@@ -2162,7 +2164,10 @@ NAME (aout, swap_ext_reloc_in) (bfd *abfd,
                >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
     }
 
-  cache_ptr->howto =  howto_table_ext + r_type;
+  if (r_type < TABLE_SIZE (howto_table_ext))
+    cache_ptr->howto = howto_table_ext + r_type;
+  else
+    cache_ptr->howto = NULL;
 
   /* Base relative relocs are always against the symbol table,
      regardless of the setting of r_extern.  r_extern just reflects
@@ -2230,9 +2235,14 @@ NAME (aout, swap_std_reloc_in) (bfd *abfd,
 
   howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
               + 16 * r_jmptable + 32 * r_relative);
-  BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
-  cache_ptr->howto =  howto_table_std + howto_idx;
-  BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
+  if (howto_idx < TABLE_SIZE (howto_table_std))
+    {
+      cache_ptr->howto = howto_table_std + howto_idx;
+      if (cache_ptr->howto->type == (unsigned int) -1)
+       cache_ptr->howto = NULL;
+    }
+  else
+    cache_ptr->howto = NULL;
 
   /* Base relative relocs are always against the symbol table,
      regardless of the setting of r_extern.  r_extern just reflects
@@ -2951,13 +2961,16 @@ aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
        return FALSE;
     }
 
+  if (sym_count == 0)
+    return TRUE;               /* Nothing to do.  */
+
   /* We keep a list of the linker hash table entries that correspond
      to particular symbols.  We could just look them up in the hash
      table, but keeping the list is more efficient.  Perhaps this
      should be conditional on info->keep_memory.  */
   amt = sym_count * sizeof (struct aout_link_hash_entry *);
   sym_hash = bfd_alloc (abfd, amt);
-  if (sym_hash == NULL && sym_count != 0)
+  if (sym_hash == NULL)
     return FALSE;
   obj_aout_sym_hashes (abfd) = sym_hash;
 
@@ -3963,11 +3976,21 @@ aout_link_input_section_std (struct aout_final_link_info *finfo,
 
        howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
                     + 16 * r_jmptable + 32 * r_relative);
-       BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
-       howto = howto_table_std + howto_idx;
+       if (howto_idx < TABLE_SIZE (howto_table_std))
+         howto = howto_table_std + howto_idx;
+       else
+         howto = NULL;
       }
 #endif
 
+      if (howto == NULL)
+       {
+         (*finfo->info->callbacks->einfo)
+           (_("%P: %B: unexpected relocation type\n"), input_bfd);
+         bfd_set_error (bfd_error_bad_value);
+         return FALSE;
+       }
+
       if (relocatable)
        {
          /* We are generating a relocatable output file, and must
@@ -4286,7 +4309,13 @@ aout_link_input_section_ext (struct aout_final_link_info *finfo,
 
       r_addend = GET_SWORD (input_bfd, rel->r_addend);
 
-      BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
+      if (r_type >= TABLE_SIZE (howto_table_ext))
+       {
+         (*finfo->info->callbacks->einfo)
+           (_("%P: %B: unexpected relocation type\n"), input_bfd);
+         bfd_set_error (bfd_error_bad_value);
+         return FALSE;
+       }
 
       if (relocatable)
        {
@@ -5557,22 +5586,19 @@ NAME (aout, final_link) (bfd *abfd,
     exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
 
   /* Write out the string table, unless there are no symbols.  */
+  if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
+    goto error_return;
   if (abfd->symcount > 0)
     {
-      if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
-         || ! emit_stringtab (abfd, aout_info.strtab))
+      if (!emit_stringtab (abfd, aout_info.strtab))
        goto error_return;
     }
-  else if (obj_textsec (abfd)->reloc_count == 0
-          && obj_datasec (abfd)->reloc_count == 0)
+  else
     {
-      bfd_byte b;
-      file_ptr pos;
+      bfd_byte b[BYTES_IN_WORD];
 
-      b = 0;
-      pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1;
-      if (bfd_seek (abfd, pos, SEEK_SET) != 0
-         || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
+      memset (b, 0, BYTES_IN_WORD);
+      if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
        goto error_return;
     }