Check if a symbol is hidden by linker script.
bfd/
2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
PR ld/12975
* bfd-in.h (bfd_elf_size_dynamic_sections): Remove pointer
to struct bfd_elf_version_tree.
* elflink.c (elf_info_failed): Remove verdefs.
(_bfd_elf_export_symbol): Updated.
_bfd_elf_link_assign_sym_version): Likewise.
(bfd_elf_size_dynamic_sections): Remove pointer to struct
bfd_elf_version_tree. Updated.
(bfd_elf_gc_mark_dynamic_ref_symbol): Check if a symbol is hidden
by linker script.
* linker.c (bfd_hide_sym_by_version): New.
* bfd-in2.h: Regenerated.
include/
2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
PR ld/12975
* bfdlink.h (bfd_link_info): Add version_info.
ld/
2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
PR ld/12975
* ldlang.c (lang_elf_version_info): Removed.
(lang_register_vers_node): Replace lang_elf_version_info with
link_info.version_info.
(lang_add_vers_depend): Likewise.
* pe-dll.c (process_def_file_and_drectve): Likewise.
* emultempl/solaris2.em (elf_solaris2_before_allocation): Likewise.
* ldlang.h (lang_elf_version_info): Removed.
* plugin.c (is_visible_from_outside): Check if symbol is hidden
by version script.
* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
Remove lang_elf_version_info.
ld/testsuite/
2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
PR ld/12975
* ld-elf/pr12975.d: New.
* ld-elf/pr12975.s: Likewise.
* ld-elf/pr12975.t: Likewise.
This commit is contained in:
H.J. Lu
parent
d0bc107f79
commit
fd91d41947
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@ -1,3 +1,21 @@
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2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/12975
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* bfd-in.h (bfd_elf_size_dynamic_sections): Remove pointer
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to struct bfd_elf_version_tree.
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* elflink.c (elf_info_failed): Remove verdefs.
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(_bfd_elf_export_symbol): Updated.
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_bfd_elf_link_assign_sym_version): Likewise.
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(bfd_elf_size_dynamic_sections): Remove pointer to struct
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bfd_elf_version_tree. Updated.
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(bfd_elf_gc_mark_dynamic_ref_symbol): Check if a symbol is hidden
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by linker script.
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* linker.c (bfd_hide_sym_by_version): New.
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* bfd-in2.h: Regenerated.
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2011-09-12 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/13178
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@ -645,8 +645,7 @@ extern bfd_boolean bfd_elf_get_bfd_needed_list
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(bfd *, struct bfd_link_needed_list **);
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extern bfd_boolean bfd_elf_size_dynamic_sections
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(bfd *, const char *, const char *, const char *, const char *, const char *,
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const char * const *, struct bfd_link_info *, struct bfd_section **,
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struct bfd_elf_version_tree *);
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const char * const *, struct bfd_link_info *, struct bfd_section **);
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extern bfd_boolean bfd_elf_size_dynsym_hash_dynstr
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(bfd *, struct bfd_link_info *);
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extern void bfd_elf_set_dt_needed_name
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@ -652,8 +652,7 @@ extern bfd_boolean bfd_elf_get_bfd_needed_list
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(bfd *, struct bfd_link_needed_list **);
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extern bfd_boolean bfd_elf_size_dynamic_sections
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(bfd *, const char *, const char *, const char *, const char *, const char *,
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const char * const *, struct bfd_link_info *, struct bfd_section **,
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struct bfd_elf_version_tree *);
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const char * const *, struct bfd_link_info *, struct bfd_section **);
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extern bfd_boolean bfd_elf_size_dynsym_hash_dynstr
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(bfd *, struct bfd_link_info *);
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extern void bfd_elf_set_dt_needed_name
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@ -6199,6 +6198,9 @@ struct bfd_elf_version_tree * bfd_find_version_for_sym
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(struct bfd_elf_version_tree *verdefs,
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const char *sym_name, bfd_boolean *hide);
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bfd_boolean bfd_hide_sym_by_version
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(struct bfd_elf_version_tree *verdefs, const char *sym_name);
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/* Extracted from simple.c. */
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bfd_byte *bfd_simple_get_relocated_section_contents
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(bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
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@ -36,7 +36,6 @@
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struct elf_info_failed
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{
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struct bfd_link_info *info;
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struct bfd_elf_version_tree *verdefs;
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bfd_boolean failed;
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};
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@ -1820,20 +1819,14 @@ _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data)
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return TRUE;
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if (h->dynindx == -1
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&& (h->def_regular
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|| h->ref_regular))
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&& (h->def_regular || h->ref_regular)
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&& ! bfd_hide_sym_by_version (eif->info->version_info,
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h->root.root.string))
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{
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bfd_boolean hide;
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if (eif->verdefs == NULL
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|| (bfd_find_version_for_sym (eif->verdefs, h->root.root.string, &hide)
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&& !hide))
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if (! bfd_elf_link_record_dynamic_symbol (eif->info, h))
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{
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if (! bfd_elf_link_record_dynamic_symbol (eif->info, h))
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{
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eif->failed = TRUE;
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return FALSE;
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}
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eif->failed = TRUE;
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return FALSE;
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}
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}
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@ -1981,7 +1974,7 @@ _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data)
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}
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/* Look for the version. If we find it, it is no longer weak. */
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for (t = sinfo->verdefs; t != NULL; t = t->next)
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for (t = sinfo->info->version_info; t != NULL; t = t->next)
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{
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if (strcmp (t->name, p) == 0)
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{
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@ -2050,9 +2043,12 @@ _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data)
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version_index = 1;
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/* Don't count anonymous version tag. */
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if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0)
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if (sinfo->info->version_info != NULL
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&& sinfo->info->version_info->vernum == 0)
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version_index = 0;
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for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next)
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for (pp = &sinfo->info->version_info;
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*pp != NULL;
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pp = &(*pp)->next)
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++version_index;
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t->vernum = version_index;
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@ -2078,12 +2074,13 @@ _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data)
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/* If we don't have a version for this symbol, see if we can find
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something. */
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if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL)
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if (h->verinfo.vertree == NULL && sinfo->info->version_info != NULL)
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{
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bfd_boolean hide;
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h->verinfo.vertree = bfd_find_version_for_sym (sinfo->verdefs,
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h->root.root.string, &hide);
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h->verinfo.vertree
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= bfd_find_version_for_sym (sinfo->info->version_info,
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h->root.root.string, &hide);
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if (h->verinfo.vertree != NULL && hide)
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(*bed->elf_backend_hide_symbol) (info, h, TRUE);
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}
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@ -5493,8 +5490,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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const char *depaudit,
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const char * const *auxiliary_filters,
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struct bfd_link_info *info,
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asection **sinterpptr,
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struct bfd_elf_version_tree *verdefs)
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asection **sinterpptr)
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{
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bfd_size_type soname_indx;
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bfd *dynobj;
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@ -5671,7 +5667,6 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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}
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eif.info = info;
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eif.verdefs = verdefs;
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eif.failed = FALSE;
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/* If we are supposed to export all symbols into the dynamic symbol
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@ -5687,7 +5682,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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}
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/* Make all global versions with definition. */
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for (t = verdefs; t != NULL; t = t->next)
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for (t = info->version_info; t != NULL; t = t->next)
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for (d = t->globals.list; d != NULL; d = d->next)
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if (!d->symver && d->literal)
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{
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@ -5740,7 +5735,6 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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/* Attach all the symbols to their version information. */
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asvinfo.info = info;
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asvinfo.verdefs = verdefs;
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asvinfo.failed = FALSE;
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elf_link_hash_traverse (elf_hash_table (info),
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@ -5753,7 +5747,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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{
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/* Check if all global versions have a definition. */
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all_defined = TRUE;
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for (t = verdefs; t != NULL; t = t->next)
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for (t = info->version_info; t != NULL; t = t->next)
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for (d = t->globals.list; d != NULL; d = d->next)
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if (d->literal && !d->symver && !d->script)
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{
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@ -5886,6 +5880,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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if (elf_hash_table (info)->dynamic_sections_created)
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{
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unsigned long section_sym_count;
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struct bfd_elf_version_tree *verdefs;
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asection *s;
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/* Set up the version definition section. */
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@ -5894,7 +5889,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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/* We may have created additional version definitions if we are
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just linking a regular application. */
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verdefs = asvinfo.verdefs;
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verdefs = info->version_info;
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/* Skip anonymous version tag. */
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if (verdefs != NULL && verdefs->vernum == 0)
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@ -11913,7 +11908,9 @@ bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf)
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|| (!info->executable
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&& h->def_regular
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&& ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
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&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN)))
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&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
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&& !bfd_hide_sym_by_version (info->version_info,
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h->root.root.string))))
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h->root.u.def.section->flags |= SEC_KEEP;
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return TRUE;
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23
bfd/linker.c
23
bfd/linker.c
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@ -3380,3 +3380,26 @@ bfd_find_version_for_sym (struct bfd_elf_version_tree *verdefs,
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return NULL;
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}
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/*
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FUNCTION
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bfd_hide_sym_by_version
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SYNOPSIS
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bfd_boolean bfd_hide_sym_by_version
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(struct bfd_elf_version_tree *verdefs, const char *sym_name);
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DESCRIPTION
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Search an elf version script tree for symbol versioning
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info for a given symbol. Return TRUE if the symbol is hidden.
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*/
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bfd_boolean
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bfd_hide_sym_by_version (struct bfd_elf_version_tree *verdefs,
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const char *sym_name)
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{
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bfd_boolean hidden = FALSE;
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bfd_find_version_for_sym (verdefs, sym_name, &hidden);
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return hidden;
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}
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@ -1,3 +1,8 @@
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2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/12975
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* bfdlink.h (bfd_link_info): Add version_info.
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2011-07-25 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
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* xregex.h (regoff_t): Define.
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@ -245,6 +245,7 @@ struct flag_info
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};
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struct bfd_elf_dynamic_list;
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struct bfd_elf_version_tree;
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/* This structure holds all the information needed to communicate
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between BFD and the linker when doing a link. */
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@ -496,6 +497,9 @@ struct bfd_link_info
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/* List of symbols should be dynamic. */
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struct bfd_elf_dynamic_list *dynamic_list;
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/* The version information. */
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struct bfd_elf_version_tree *version_info;
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};
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/* This structures holds a set of callback functions. These are called
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18
ld/ChangeLog
18
ld/ChangeLog
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@ -1,3 +1,21 @@
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2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/12975
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* ldlang.c (lang_elf_version_info): Removed.
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(lang_register_vers_node): Replace lang_elf_version_info with
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link_info.version_info.
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(lang_add_vers_depend): Likewise.
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* pe-dll.c (process_def_file_and_drectve): Likewise.
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* emultempl/solaris2.em (elf_solaris2_before_allocation): Likewise.
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* ldlang.h (lang_elf_version_info): Removed.
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* plugin.c (is_visible_from_outside): Check if symbol is hidden
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by version script.
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* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
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Remove lang_elf_version_info.
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2011-09-15 Dmitry Gorbachev <d.g.gorbachev@gmail.com>
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PR ld/13183
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@ -1535,7 +1535,7 @@ gld${EMULATION_NAME}_before_allocation (void)
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(link_info.output_bfd, command_line.soname, rpath,
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command_line.filter_shlib, audit, depaudit,
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(const char * const *) command_line.auxiliary_filters,
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&link_info, &sinterp, lang_elf_version_info)))
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&link_info, &sinterp)))
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einfo ("%P%F: failed to set dynamic section sizes: %E\n");
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${ELF_INTERPRETER_SET_DEFAULT}
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@ -76,7 +76,8 @@ elf_solaris2_before_allocation (void)
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/* Only do this if emitting a shared object and versioning is in place. */
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if (link_info.shared
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&& (lang_elf_version_info != NULL || link_info.create_default_symver))
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&& (link_info.version_info != NULL
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|| link_info.create_default_symver))
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{
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struct bfd_elf_version_expr *globals = NULL, *locals = NULL;
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struct bfd_elf_version_tree *basever;
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18
ld/ldlang.c
18
ld/ldlang.c
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@ -7458,10 +7458,6 @@ lang_leave_overlay (etree_type *lma_expr,
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/* Version handling. This is only useful for ELF. */
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/* This global variable holds the version tree that we build. */
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struct bfd_elf_version_tree *lang_elf_version_info;
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/* If PREV is NULL, return first version pattern matching particular symbol.
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If PREV is non-NULL, return first version pattern matching particular
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symbol after PREV (previously returned by lang_vers_match). */
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@ -7803,8 +7799,8 @@ lang_register_vers_node (const char *name,
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if (name == NULL)
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name = "";
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if ((name[0] == '\0' && lang_elf_version_info != NULL)
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|| (lang_elf_version_info && lang_elf_version_info->name[0] == '\0'))
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if (link_info.version_info != NULL
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&& (name[0] == '\0' || link_info.version_info->name[0] == '\0'))
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{
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einfo (_("%X%P: anonymous version tag cannot be combined"
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" with other version tags\n"));
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@ -7813,7 +7809,7 @@ lang_register_vers_node (const char *name,
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}
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/* Make sure this node has a unique name. */
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for (t = lang_elf_version_info; t != NULL; t = t->next)
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for (t = link_info.version_info; t != NULL; t = t->next)
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if (strcmp (t->name, name) == 0)
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einfo (_("%X%P: duplicate version tag `%s'\n"), name);
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@ -7825,7 +7821,7 @@ lang_register_vers_node (const char *name,
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for (e1 = version->globals.list; e1 != NULL; e1 = e1->next)
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{
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for (t = lang_elf_version_info; t != NULL; t = t->next)
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for (t = link_info.version_info; t != NULL; t = t->next)
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{
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struct bfd_elf_version_expr *e2;
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@ -7852,7 +7848,7 @@ lang_register_vers_node (const char *name,
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for (e1 = version->locals.list; e1 != NULL; e1 = e1->next)
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{
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for (t = lang_elf_version_info; t != NULL; t = t->next)
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for (t = link_info.version_info; t != NULL; t = t->next)
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{
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struct bfd_elf_version_expr *e2;
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@ -7888,7 +7884,7 @@ lang_register_vers_node (const char *name,
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else
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version->vernum = 0;
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for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next)
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for (pp = &link_info.version_info; *pp != NULL; pp = &(*pp)->next)
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;
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*pp = version;
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}
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@ -7904,7 +7900,7 @@ lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name)
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ret = (struct bfd_elf_version_deps *) xmalloc (sizeof *ret);
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ret->next = list;
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for (t = lang_elf_version_info; t != NULL; t = t->next)
|
||||
for (t = link_info.version_info; t != NULL; t = t->next)
|
||||
{
|
||||
if (strcmp (t->name, name) == 0)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -628,8 +628,6 @@ extern void lang_leave_overlay
|
|||
(etree_type *, int, fill_type *, const char *,
|
||||
lang_output_section_phdr_list *, const char *);
|
||||
|
||||
extern struct bfd_elf_version_tree *lang_elf_version_info;
|
||||
|
||||
extern struct bfd_elf_version_expr *lang_new_vers_pattern
|
||||
(struct bfd_elf_version_expr *, const char *, const char *, bfd_boolean);
|
||||
extern struct bfd_elf_version_tree *lang_new_vers_node
|
||||
|
|
|
|||
11
ld/pe-dll.c
11
ld/pe-dll.c
|
|
@ -718,13 +718,10 @@ process_def_file_and_drectve (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *
|
|||
bfd_boolean would_export = symbols[j]->section != &bfd_und_section
|
||||
&& ((symbols[j]->flags & BSF_GLOBAL)
|
||||
|| (symbols[j]->flags == 0));
|
||||
if (lang_elf_version_info && would_export)
|
||||
{
|
||||
bfd_boolean hide = 0;
|
||||
(void) bfd_find_version_for_sym (lang_elf_version_info,
|
||||
symbols[j]->name, &hide);
|
||||
would_export = !hide;
|
||||
}
|
||||
if (link_info.version_info && would_export)
|
||||
would_export
|
||||
= !bfd_hide_sym_by_version (link_info.version_info,
|
||||
symbols[j]->name);
|
||||
if (would_export)
|
||||
{
|
||||
const char *sn = symbols[j]->name;
|
||||
|
|
|
|||
|
|
@ -454,6 +454,10 @@ is_visible_from_outside (struct ld_plugin_symbol *lsym, asection *section,
|
|||
return TRUE;
|
||||
if (link_info.export_dynamic || link_info.shared)
|
||||
{
|
||||
/* Check if symbol is hidden by version script. */
|
||||
if (bfd_hide_sym_by_version (link_info.version_info,
|
||||
blhe->root.string))
|
||||
return FALSE;
|
||||
/* Only ELF symbols really have visibility. */
|
||||
if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -1,3 +1,10 @@
|
|||
2011-09-15 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
PR ld/12975
|
||||
* ld-elf/pr12975.d: New.
|
||||
* ld-elf/pr12975.s: Likewise.
|
||||
* ld-elf/pr12975.t: Likewise.
|
||||
|
||||
2011-09-12 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
PR ld/13178
|
||||
|
|
|
|||
|
|
@ -0,0 +1,10 @@
|
|||
#ld: --gc-sections -shared -version-script pr12975.t
|
||||
#readelf: -s --wide
|
||||
#notarget: arc-*-* d30v-*-* dlx-*-* i960-*-* or32-*-* pj*-*-*
|
||||
#notarget: hppa64-*-* i370-*-* i860-*-* ia64-*-* mep-*-* mn10200-*-*
|
||||
# generic linker targets don't support --gc-sections, nor do a bunch of others
|
||||
|
||||
#failif
|
||||
#...
|
||||
+[0-9]+: +[0-9a-f]+ +[0-9]+ +FUNC +LOCAL +DEFAULT +[1-9]+ bar
|
||||
#...
|
||||
|
|
@ -0,0 +1,10 @@
|
|||
.section .text.foo,"ax",%progbits
|
||||
.globl foo
|
||||
.type foo, %function
|
||||
foo:
|
||||
.byte 0
|
||||
.section .text.bar,"ax",%progbits
|
||||
.type bar, %function
|
||||
.globl bar
|
||||
bar:
|
||||
.byte 0
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
{
|
||||
global:
|
||||
foo;
|
||||
local:
|
||||
*;
|
||||
};
|
||||
Loading…
Reference in New Issue