+2002-06-23 Alan Modra <amodra@bigpond.net.au>
+
+ * elflink.h: Comment typo fixes.
+
+2002-06-23 H.J. Lu <hjl@gnu.org>
+
+ * elf-bfd.h (elf_link_loaded_list): New structure.
+ (elf_link_hash_table): Add "loaded".
+ * elf.c (_bfd_elf_link_hash_table_init): Initialize "loaded".
+ * elflink.h (elf_link_check_versioned_symbol): New function.
+ (elf_link_output_extsym): Call elf_link_check_versioned_symbol.
+
2002-06-19 Nick Clifton <nickc@cambridge.redhat.com>
* elflink.h (size_dynamic_sections): If the target does not
- support an ELF style has table, return true, indicating that
+ support an ELF style hash table, return true, indicating that
nothing needed to be done, rather than false, indicating that the
section's size could not be computed.
2002-06-17 Tom Rix <trix@redhat.com>
* elf32-d10v.c (elf_d10v_howto_table): Change R_D10V_10_PCREL_R,
- R_D10V_10_PCREL_L and R_D10V_18_PCREL to use
+ R_D10V_10_PCREL_L and R_D10V_18_PCREL to use
complain_overflow_bitfield.
2002-06-17 Alan Modra <amodra@bigpond.net.au>
* coffcode.h (coff_compute_section_file_positions): Add data
section to AIX loader alignment check.
- * coff-rs6000.c (_bfd_xcoff_mkobject): Set default text section
+ * coff-rs6000.c (_bfd_xcoff_mkobject): Set default text section
alignment to 4 bytes.
(_bfd_xcoff_copy_private_bfd_data): Use text and data alignment
power accessor macro.
}
}
+ if (is_elf_hash_table (info))
+ {
+ /* Add this bfd to the loaded list. */
+ struct elf_link_loaded_list *n;
+
+ n = ((struct elf_link_loaded_list *)
+ bfd_alloc (abfd, sizeof (struct elf_link_loaded_list)));
+ if (n == NULL)
+ goto error_return;
+ n->abfd = abfd;
+ n->next = hash_table->loaded;
+ hash_table->loaded = n;
+ }
+
return true;
error_return:
PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean elf_link_sec_merge_syms
PARAMS ((struct elf_link_hash_entry *, PTR));
+static boolean elf_link_check_versioned_symbol
+ PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static boolean elf_link_input_bfd
PARAMS ((struct elf_final_link_info *, bfd *));
static boolean elf_reloc_link_order
return true;
}
+/* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
+ allowing an unsatisfied unversioned symbol in the DSO to match a
+ versioned symbol that would normally require an explicit version. */
+
+static boolean
+elf_link_check_versioned_symbol (info, h)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+{
+ bfd *undef_bfd = h->root.u.undef.abfd;
+ struct elf_link_loaded_list *loaded;
+ Elf_External_Sym *buf;
+ Elf_External_Versym *extversym;
+
+ if ((undef_bfd->flags & DYNAMIC) == 0
+ || info->hash->creator->flavour != bfd_target_elf_flavour
+ || elf_dt_soname (h->root.u.undef.abfd) == NULL)
+ return false;
+
+ for (loaded = elf_hash_table (info)->loaded;
+ loaded != NULL;
+ loaded = loaded->next)
+ {
+ bfd *input;
+ Elf_Internal_Shdr *hdr;
+ bfd_size_type symcount;
+ bfd_size_type extsymcount;
+ bfd_size_type extsymoff;
+ Elf_Internal_Shdr *versymhdr;
+ Elf_External_Versym *ever;
+ Elf_External_Sym *esym;
+ Elf_External_Sym *esymend;
+ bfd_size_type count;
+ file_ptr pos;
+
+ input = loaded->abfd;
+
+ /* We check each DSO for a possible hidden versioned definition. */
+ if (input == undef_bfd
+ || (input->flags & DYNAMIC) == 0
+ || elf_dynversym (input) == 0)
+ continue;
+
+ hdr = &elf_tdata (input)->dynsymtab_hdr;
+
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ if (elf_bad_symtab (input))
+ {
+ extsymcount = symcount;
+ extsymoff = 0;
+ }
+ else
+ {
+ extsymcount = symcount - hdr->sh_info;
+ extsymoff = hdr->sh_info;
+ }
+
+ if (extsymcount == 0)
+ continue;
+
+ count = extsymcount * sizeof (Elf_External_Sym);
+ buf = (Elf_External_Sym *) bfd_malloc (count);
+ if (buf == NULL)
+ return false;
+
+ /* Read in the symbol table. */
+ pos = hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym);
+ if (bfd_seek (input, pos, SEEK_SET) != 0
+ || bfd_bread ((PTR) buf, count, input) != count)
+ goto error_ret;
+
+ /* Read in any version definitions. */
+ versymhdr = &elf_tdata (input)->dynversym_hdr;
+ extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size);
+ if (extversym == NULL)
+ goto error_ret;
+
+ if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0
+ || (bfd_bread ((PTR) extversym, versymhdr->sh_size, input)
+ != versymhdr->sh_size))
+ {
+ free (extversym);
+ error_ret:
+ free (buf);
+ return false;
+ }
+
+ ever = extversym + extsymoff;
+ esymend = buf + extsymcount;
+ for (esym = buf; esym < esymend; esym++, ever++)
+ {
+ const char *name;
+ Elf_Internal_Sym sym;
+ Elf_Internal_Versym iver;
+
+ elf_swap_symbol_in (input, esym, NULL, &sym);
+ if (ELF_ST_BIND (sym.st_info) == STB_LOCAL
+ || sym.st_shndx == SHN_UNDEF)
+ continue;
+
+ name = bfd_elf_string_from_elf_section (input,
+ hdr->sh_link,
+ sym.st_name);
+ if (strcmp (name, h->root.root.string) != 0)
+ continue;
+
+ _bfd_elf_swap_versym_in (input, ever, &iver);
+
+ if ((iver.vs_vers & VERSYM_HIDDEN) == 0)
+ {
+ /* If we have a non-hidden versioned sym, then it should
+ have provided a definition for the undefined sym. */
+ abort ();
+ }
+
+ if ((iver.vs_vers & VERSYM_VERSION) == 2)
+ {
+ /* This is the oldest (default) sym. We can use it. */
+ free (extversym);
+ free (buf);
+ return true;
+ }
+ }
+
+ free (extversym);
+ free (buf);
+ }
+
+ return false;
+}
+
/* Add an external symbol to the symbol table. This is called from
the hash table traversal routine. When generating a shared object,
we go through the symbol table twice. The first time we output
&& ! finfo->info->shared
&& h->root.type == bfd_link_hash_undefined
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0
+ && ! elf_link_check_versioned_symbol (finfo->info, h))
{
if (! ((*finfo->info->callbacks->undefined_symbol)
(finfo->info, h->root.root.string, h->root.u.undef.abfd,
sym.st_other ^= ELF_ST_VISIBILITY (sym.st_other);
/* If this symbol should be put in the .dynsym section, then put it
- there now. We have already know the symbol index. We also fill
- in the entry in the .hash section. */
+ there now. We already know the symbol index. We also fill in
+ the entry in the .hash section. */
if (h->dynindx != -1
&& elf_hash_table (finfo->info)->dynamic_sections_created)
{
}
/* Adjust the addend according to where the
- section winds up in the output section. */
+ section winds up in the output section. */
if (rela_normal)
irela->r_addend += sec->output_offset;
}
projects / external / binutils.git / commitdiff