dynobj = elf_hash_table (eif->info)->dynobj;
bed = get_elf_backend_data (dynobj);
-
- if (h->type == STT_GNU_IFUNC
- && (bed->elf_osabi == ELFOSABI_LINUX
- /* GNU/Linux is still using the default value 0. */
- || bed->elf_osabi == ELFOSABI_NONE))
- h->needs_plt = 1;
-
if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h))
{
eif->failed = TRUE;
h->type = ELF_ST_TYPE (isym->st_info);
}
+ /* STT_GNU_IFUNC symbol must go through PLT. */
+ if (h->type == STT_GNU_IFUNC)
+ h->needs_plt = 1;
+
/* Merge st_other field. */
elf_merge_st_other (abfd, h, isym, definition, dynamic);
struct elf_link_hash_entry *h,
bfd_boolean force_local)
{
- h->plt = elf_hash_table (info)->init_plt_offset;
- h->needs_plt = 0;
+ /* STT_GNU_IFUNC symbol must go through PLT. */
+ if (h->type != STT_GNU_IFUNC)
+ {
+ h->plt = elf_hash_table (info)->init_plt_offset;
+ h->needs_plt = 0;
+ }
if (force_local)
{
h->forced_local = 1;
/* Give the processor backend a chance to tweak the symbol value,
and also to finish up anything that needs to be done for this
symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
- forced local syms when non-shared is due to a historical quirk. */
- if ((h->dynindx != -1
- || h->forced_local)
- && ((finfo->info->shared
- && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- || h->root.type != bfd_link_hash_undefweak))
- || !h->forced_local)
- && elf_hash_table (finfo->info)->dynamic_sections_created)
+ forced local syms when non-shared is due to a historical quirk.
+ STT_GNU_IFUNC symbol must go through PLT. */
+ if ((h->type == STT_GNU_IFUNC
+ && h->ref_regular
+ && !finfo->info->relocatable)
+ || ((h->dynindx != -1
+ || h->forced_local)
+ && ((finfo->info->shared
+ && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+ || h->root.type != bfd_link_hash_undefweak))
+ || !h->forced_local)
+ && elf_hash_table (finfo->info)->dynamic_sections_created))
{
if (! ((*bed->elf_backend_finish_dynamic_symbol)
(finfo->output_bfd, finfo->info, h, &sym)))
return reloc_sec;
}
-/* Returns the name of the ifunc using dynamic reloc section associated with SEC. */
-#define IFUNC_INFIX ".ifunc"
+/* Create sections needed by STT_GNU_IFUNC symbol for static
+ executables. */
-static const char *
-get_ifunc_reloc_section_name (bfd * abfd,
- asection * sec)
+bfd_boolean
+_bfd_elf_create_static_ifunc_sections (bfd *abfd,
+ struct bfd_link_info *info)
{
- const char * dot;
- char * name;
- const char * base_name;
- unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
- unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
-
- base_name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
- if (base_name == NULL)
- return NULL;
-
- dot = strchr (base_name + 1, '.');
- name = bfd_alloc (abfd, strlen (base_name) + strlen (IFUNC_INFIX) + 1);
- sprintf (name, "%.*s%s%s", (int)(dot - base_name), base_name, IFUNC_INFIX, dot);
+ flagword flags, pltflags;
+ int ptralign;
+ asection *s;
+ const struct elf_backend_data *bed;
- return name;
-}
+ /* Should never be called for shared library. */
+ BFD_ASSERT (!info->shared);
-/* Like _bfd_elf_make_dynamic_reloc_section but it creates a
- section for holding relocs against symbols with the STT_GNU_IFUNC
- type. The section is attached to the OWNER bfd but it is created
- with a name based on SEC from ABFD. */
+ /* This function may be called more than once. */
+ s = bfd_get_section_by_name (abfd, ".iplt");
+ if (s != NULL)
+ return TRUE;
-asection *
-_bfd_elf_make_ifunc_reloc_section (bfd * abfd,
- asection * sec,
- bfd * owner,
- unsigned int align)
-{
- asection * reloc_sec = elf_section_data (sec)->indirect_relocs;
+ bed = get_elf_backend_data (abfd);
- if (reloc_sec == NULL)
- {
- const char * name = get_ifunc_reloc_section_name (abfd, sec);
+ /* We need to create .iplt, .rel[a].iplt, .igot, .igot.plt, */
+ flags = bed->dynamic_sec_flags;
- if (name == NULL)
- return NULL;
+ pltflags = flags;
+ if (bed->plt_not_loaded)
+ /* We do not clear SEC_ALLOC here because we still want the OS to
+ allocate space for the section; it's just that there's nothing
+ to read in from the object file. */
+ pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
+ else
+ pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD;
+ if (bed->plt_readonly)
+ pltflags |= SEC_READONLY;
- reloc_sec = bfd_get_section_by_name (owner, name);
+ s = bfd_make_section_with_flags (abfd, ".iplt", pltflags);
+ if (s == NULL
+ || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
+ return FALSE;
- if (reloc_sec == NULL)
- {
- flagword flags;
+ s = bfd_make_section_with_flags (abfd,
+ (bed->rela_plts_and_copies_p
+ ? ".rela.iplt" : ".rel.iplt"),
+ flags | SEC_READONLY);
+ if (s == NULL
+ || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
+ return FALSE;
- flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- if ((sec->flags & SEC_ALLOC) != 0)
- flags |= SEC_ALLOC | SEC_LOAD;
+ switch (bed->s->arch_size)
+ {
+ case 32:
+ ptralign = 2;
+ break;
- reloc_sec = bfd_make_section_with_flags (owner, name, flags);
-
- if (reloc_sec != NULL
- && ! bfd_set_section_alignment (owner, reloc_sec, align))
- reloc_sec = NULL;
- }
+ case 64:
+ ptralign = 3;
+ break;
- elf_section_data (sec)->indirect_relocs = reloc_sec;
+ default:
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
}
- return reloc_sec;
-}
-
-/* Returns true if the hash entry refers to a symbol marked for
- indirect handling during reloc processing. */
-
-bfd_boolean
-_bfd_elf_is_ifunc_symbol (bfd *abfd, struct elf_link_hash_entry *h)
-{
- const struct elf_backend_data * bed;
-
- if (abfd == NULL || h == NULL)
- return FALSE;
+ /* We don't need the .igot section if we have the .igot.plt
+ section. */
- bed = get_elf_backend_data (abfd);
+ if (bed->want_got_plt)
+ {
+ s = bfd_make_section_with_flags (abfd, ".igot.plt", flags);
+ if (s == NULL
+ || !bfd_set_section_alignment (abfd, s, ptralign))
+ return FALSE;
+ }
+ else
+ {
+ s = bfd_make_section_with_flags (abfd, ".igot", flags);
+ if (s == NULL
+ || !bfd_set_section_alignment (abfd, s, ptralign))
+ return FALSE;
+ }
- /* GNU/Linux is still using the default value ELFOSABI_NONE. */
- return (h->type == STT_GNU_IFUNC
- && (bed->elf_osabi == ELFOSABI_LINUX
- || bed->elf_osabi == ELFOSABI_NONE));
+ return TRUE;
}
projects / binutils-gdb.git / commitdiff