+2016-06-09 Alan Modra <amodra@gmail.com>
+
+ PR ld/20159
+ PR ld/16467
+ * elflink.c (_bfd_elf_merge_symbol): Revert PR16467 change.
+ (_bfd_elf_add_default_symbol): Don't indirect to/from defined
+ symbol given a version by a script different to the version
+ of the symbol being added.
+ (elf_link_add_object_symbols): Use _bfd_elf_strtab_save and
+ _bfd_elf_strtab_restore. Don't fudge dynstr references.
+ * elf-strtab.c (_bfd_elf_strtab_restore_size): Delete.
+ (struct strtab_save): New.
+ (_bfd_elf_strtab_save, _bfd_elf_strtab_restore): New functions.
+ * elf-bfd.h (_bfd_elf_strtab_restore_size): Delete.
+ (_bfd_elf_strtab_save, _bfd_elf_strtab_restore): Declare.
+
2016-05-20 H.J. Lu <hongjiu.lu@intel.com>
Backport from master
extern unsigned int _bfd_elf_strtab_refcount
(struct elf_strtab_hash *, bfd_size_type);
extern void _bfd_elf_strtab_clear_all_refs
- (struct elf_strtab_hash *tab);
-extern void _bfd_elf_strtab_restore_size
- (struct elf_strtab_hash *, bfd_size_type);
+ (struct elf_strtab_hash *);
+extern void *_bfd_elf_strtab_save
+ (struct elf_strtab_hash *);
+extern void _bfd_elf_strtab_restore
+ (struct elf_strtab_hash *, void *);
extern bfd_size_type _bfd_elf_strtab_size
(struct elf_strtab_hash *);
extern bfd_size_type _bfd_elf_strtab_offset
tab->array[idx]->refcount = 0;
}
-/* Downsizes strtab. Entries from IDX up to the current size are
- removed from the array. */
+/* Save strtab refcounts prior to adding --as-needed library. */
+
+struct strtab_save
+{
+ bfd_size_type size;
+ unsigned int refcount[1];
+};
+
+void *
+_bfd_elf_strtab_save (struct elf_strtab_hash *tab)
+{
+ struct strtab_save *save;
+ bfd_size_type idx, size;
+
+ size = sizeof (*save) + (tab->size - 1) * sizeof (save->refcount[0]);
+ save = bfd_malloc (size);
+ if (save == NULL)
+ return save;
+
+ save->size = tab->size;
+ for (idx = 1; idx < tab->size; idx++)
+ save->refcount[idx] = tab->array[idx]->refcount;
+ return save;
+}
+
+/* Restore strtab refcounts on finding --as-needed library not needed. */
+
void
-_bfd_elf_strtab_restore_size (struct elf_strtab_hash *tab, bfd_size_type idx)
+_bfd_elf_strtab_restore (struct elf_strtab_hash *tab, void *buf)
{
- bfd_size_type curr_size = tab->size;
+ bfd_size_type idx, curr_size = tab->size;
+ struct strtab_save *save = (struct strtab_save *) buf;
BFD_ASSERT (tab->sec_size == 0);
- BFD_ASSERT (idx <= curr_size);
- tab->size = idx;
+ BFD_ASSERT (save->size <= curr_size);
+ tab->size = save->size;
+ for (idx = 1; idx < save->size; ++idx)
+ tab->array[idx]->refcount = save->refcount[idx];
+
for (; idx < curr_size; ++idx)
{
/* We don't remove entries from the hash table, just set their
oldfunc = (h->type != STT_NOTYPE
&& bed->is_function_type (h->type));
- /* When we try to create a default indirect symbol from the dynamic
- definition with the default version, we skip it if its type and
- the type of existing regular definition mismatch. */
+ /* If creating a default indirect symbol ("foo" or "foo@") from a
+ dynamic versioned definition ("foo@@") skip doing so if there is
+ an existing regular definition with a different type. We don't
+ want, for example, a "time" variable in the executable overriding
+ a "time" function in a shared library. */
if (pold_alignment == NULL
&& newdyn
&& newdef
&& !olddyn
- && (((olddef || h->root.type == bfd_link_hash_common)
- && ELF_ST_TYPE (sym->st_info) != h->type
- && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE
- && h->type != STT_NOTYPE
- && !(newfunc && oldfunc))
- || (olddef
- && ((h->type == STT_GNU_IFUNC)
- != (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))))
+ && (olddef || h->root.type == bfd_link_hash_common)
+ && ELF_ST_TYPE (sym->st_info) != h->type
+ && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE
+ && h->type != STT_NOTYPE
+ && !(newfunc && oldfunc))
{
*skip = TRUE;
return TRUE;
if (skip)
goto nondefault;
+ if (hi->def_regular)
+ {
+ /* If the undecorated symbol will have a version added by a
+ script different to H, then don't indirect to/from the
+ undecorated symbol. This isn't ideal because we may not yet
+ have seen symbol versions, if given by a script on the
+ command line rather than via --version-script. */
+ if (hi->verinfo.vertree == NULL && info->version_info != NULL)
+ {
+ bfd_boolean hide;
+
+ hi->verinfo.vertree
+ = bfd_find_version_for_sym (info->version_info,
+ hi->root.root.string, &hide);
+ if (hi->verinfo.vertree != NULL && hide)
+ {
+ (*bed->elf_backend_hide_symbol) (info, hi, TRUE);
+ goto nondefault;
+ }
+ }
+ if (hi->verinfo.vertree != NULL
+ && strcmp (p + 1 + (p[1] == '@'), hi->verinfo.vertree->name) != 0)
+ goto nondefault;
+ }
+
if (! override)
{
/* Add the default symbol if not performing a relocatable link. */
void *old_ent;
struct bfd_link_hash_entry *old_undefs = NULL;
struct bfd_link_hash_entry *old_undefs_tail = NULL;
- long old_dynsymcount = 0;
- bfd_size_type old_dynstr_size = 0;
+ void *old_strtab = NULL;
size_t tabsize = 0;
asection *s;
bfd_boolean just_syms;
old_table = htab->root.table.table;
old_size = htab->root.table.size;
old_count = htab->root.table.count;
- old_dynsymcount = htab->dynsymcount;
- old_dynstr_size = _bfd_elf_strtab_size (htab->dynstr);
+ old_strtab = _bfd_elf_strtab_save (htab->dynstr);
+ if (old_strtab == NULL)
+ goto error_free_vers;
for (i = 0; i < htab->root.table.size; i++)
{
memcpy (htab->root.table.table, old_tab, tabsize);
htab->root.undefs = old_undefs;
htab->root.undefs_tail = old_undefs_tail;
- _bfd_elf_strtab_restore_size (htab->dynstr, old_dynstr_size);
+ _bfd_elf_strtab_restore (htab->dynstr, old_strtab);
+ free (old_strtab);
+ old_strtab = NULL;
for (i = 0; i < htab->root.table.size; i++)
{
struct bfd_hash_entry *p;
h = (struct elf_link_hash_entry *) p;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
- if (h->dynindx >= old_dynsymcount
- && h->dynstr_index < old_dynstr_size)
- _bfd_elf_strtab_delref (htab->dynstr, h->dynstr_index);
/* Preserve the maximum alignment and size for common
symbols even if this dynamic lib isn't on DT_NEEDED
error_free_vers:
if (old_tab != NULL)
free (old_tab);
+ if (old_strtab != NULL)
+ free (old_strtab);
if (nondeflt_vers != NULL)
free (nondeflt_vers);
if (extversym != NULL)
projects / thirdparty / binutils-gdb.git / commitdiff
