return elf_hash_table (info)->tls_sec->vma;
}
+/* Allocate space in .plt, .got and associated reloc sections for
+ dynamic relocs. */
+
+static bfd_boolean
+elf_x86_allocate_dynrelocs (struct elf_link_hash_entry *h,
+ void *inf)
+{
+ struct bfd_link_info *info;
+ struct elf_x86_link_hash_table *htab;
+ struct elf_x86_link_hash_entry *eh;
+ struct elf_dyn_relocs *p;
+ unsigned int plt_entry_size;
+ bfd_boolean resolved_to_zero;
+ const struct elf_backend_data *bed;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ eh = (struct elf_x86_link_hash_entry *) h;
+
+ info = (struct bfd_link_info *) inf;
+ bed = get_elf_backend_data (info->output_bfd);
+ htab = elf_x86_hash_table (info, bed->target_id);
+ if (htab == NULL)
+ return FALSE;
+
+ plt_entry_size = htab->plt.plt_entry_size;
+
+ resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
+
+ /* Clear the reference count of function pointer relocations if
+ symbol isn't a normal function. */
+ if (h->type != STT_FUNC)
+ eh->func_pointer_refcount = 0;
+
+ /* We can't use the GOT PLT if pointer equality is needed since
+ finish_dynamic_symbol won't clear symbol value and the dynamic
+ linker won't update the GOT slot. We will get into an infinite
+ loop at run-time. */
+ if (htab->plt_got != NULL
+ && h->type != STT_GNU_IFUNC
+ && !h->pointer_equality_needed
+ && h->plt.refcount > 0
+ && h->got.refcount > 0)
+ {
+ /* Don't use the regular PLT if there are both GOT and GOTPLT
+ reloctions. */
+ h->plt.offset = (bfd_vma) -1;
+
+ /* Use the GOT PLT. */
+ eh->plt_got.refcount = 1;
+ }
+
+ /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
+ here if it is defined and referenced in a non-shared object. */
+ if (h->type == STT_GNU_IFUNC
+ && h->def_regular)
+ {
+ if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
+ &htab->readonly_dynrelocs_against_ifunc,
+ plt_entry_size,
+ (htab->plt.has_plt0
+ * plt_entry_size),
+ htab->got_entry_size,
+ TRUE))
+ {
+ asection *s = htab->plt_second;
+ if (h->plt.offset != (bfd_vma) -1 && s != NULL)
+ {
+ /* Use the second PLT section if it is created. */
+ eh->plt_second.offset = s->size;
+
+ /* Make room for this entry in the second PLT section. */
+ s->size += htab->non_lazy_plt->plt_entry_size;
+ }
+
+ return TRUE;
+ }
+ else
+ return FALSE;
+ }
+ /* Don't create the PLT entry if there are only function pointer
+ relocations which can be resolved at run-time. */
+ else if (htab->elf.dynamic_sections_created
+ && (h->plt.refcount > eh->func_pointer_refcount
+ || eh->plt_got.refcount > 0))
+ {
+ bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
+
+ /* Clear the reference count of function pointer relocations
+ if PLT is used. */
+ eh->func_pointer_refcount = 0;
+
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local
+ && !resolved_to_zero
+ && h->root.type == bfd_link_hash_undefweak)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ if (bfd_link_pic (info)
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
+ {
+ asection *s = htab->elf.splt;
+ asection *second_s = htab->plt_second;
+ asection *got_s = htab->plt_got;
+
+ /* If this is the first .plt entry, make room for the special
+ first entry. The .plt section is used by prelink to undo
+ prelinking for dynamic relocations. */
+ if (s->size == 0)
+ s->size = htab->plt.has_plt0 * plt_entry_size;
+
+ if (use_plt_got)
+ eh->plt_got.offset = got_s->size;
+ else
+ {
+ h->plt.offset = s->size;
+ if (second_s)
+ eh->plt_second.offset = second_s->size;
+ }
+
+ /* If this symbol is not defined in a regular file, and we are
+ not generating a shared library, then set the symbol to this
+ location in the .plt. This is required to make function
+ pointers compare as equal between the normal executable and
+ the shared library. */
+ if (! bfd_link_pic (info)
+ && !h->def_regular)
+ {
+ if (use_plt_got)
+ {
+ /* We need to make a call to the entry of the GOT PLT
+ instead of regular PLT entry. */
+ h->root.u.def.section = got_s;
+ h->root.u.def.value = eh->plt_got.offset;
+ }
+ else
+ {
+ if (second_s)
+ {
+ /* We need to make a call to the entry of the
+ second PLT instead of regular PLT entry. */
+ h->root.u.def.section = second_s;
+ h->root.u.def.value = eh->plt_second.offset;
+ }
+ else
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = h->plt.offset;
+ }
+ }
+ }
+
+ /* Make room for this entry. */
+ if (use_plt_got)
+ got_s->size += htab->non_lazy_plt->plt_entry_size;
+ else
+ {
+ s->size += plt_entry_size;
+ if (second_s)
+ second_s->size += htab->non_lazy_plt->plt_entry_size;
+
+ /* We also need to make an entry in the .got.plt section,
+ which will be placed in the .got section by the linker
+ script. */
+ htab->elf.sgotplt->size += htab->got_entry_size;
+
+ /* There should be no PLT relocation against resolved
+ undefined weak symbol in executable. */
+ if (!resolved_to_zero)
+ {
+ /* We also need to make an entry in the .rel.plt
+ section. */
+ htab->elf.srelplt->size += htab->sizeof_reloc;
+ htab->elf.srelplt->reloc_count++;
+ }
+ }
+
+ if (htab->is_vxworks && !bfd_link_pic (info))
+ {
+ /* VxWorks has a second set of relocations for each PLT entry
+ in executables. They go in a separate relocation section,
+ which is processed by the kernel loader. */
+
+ /* There are two relocations for the initial PLT entry: an
+ R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
+ R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
+
+ asection *srelplt2 = htab->srelplt2;
+ if (h->plt.offset == plt_entry_size)
+ srelplt2->size += (htab->sizeof_reloc * 2);
+
+ /* There are two extra relocations for each subsequent PLT entry:
+ an R_386_32 relocation for the GOT entry, and an R_386_32
+ relocation for the PLT entry. */
+
+ srelplt2->size += (htab->sizeof_reloc * 2);
+ }
+ }
+ else
+ {
+ eh->plt_got.offset = (bfd_vma) -1;
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+ }
+ else
+ {
+ eh->plt_got.offset = (bfd_vma) -1;
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+
+ eh->tlsdesc_got = (bfd_vma) -1;
+
+ /* For i386, if R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the
+ binary, make it a R_386_TLS_LE_32 requiring no TLS entry. For
+ x86-64, if R_X86_64_GOTTPOFF symbol is now local to the binary,
+ make it a R_X86_64_TPOFF32 requiring no GOT entry. */
+ if (h->got.refcount > 0
+ && bfd_link_executable (info)
+ && h->dynindx == -1
+ && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
+ h->got.offset = (bfd_vma) -1;
+ else if (h->got.refcount > 0)
+ {
+ asection *s;
+ bfd_boolean dyn;
+ int tls_type = elf_x86_hash_entry (h)->tls_type;
+
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local
+ && !resolved_to_zero
+ && h->root.type == bfd_link_hash_undefweak)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ s = htab->elf.sgot;
+ if (GOT_TLS_GDESC_P (tls_type))
+ {
+ eh->tlsdesc_got = htab->elf.sgotplt->size
+ - elf_x86_compute_jump_table_size (htab);
+ htab->elf.sgotplt->size += 2 * htab->got_entry_size;
+ h->got.offset = (bfd_vma) -2;
+ }
+ if (! GOT_TLS_GDESC_P (tls_type)
+ || GOT_TLS_GD_P (tls_type))
+ {
+ h->got.offset = s->size;
+ s->size += htab->got_entry_size;
+ /* R_386_TLS_GD and R_X86_64_TLSGD need 2 consecutive GOT
+ slots. */
+ if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
+ s->size += htab->got_entry_size;
+ }
+ dyn = htab->elf.dynamic_sections_created;
+ /* R_386_TLS_IE_32 needs one dynamic relocation,
+ R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
+ (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
+ need two), R_386_TLS_GD and R_X86_64_TLSGD need one if local
+ symbol and two if global. No dynamic relocation against
+ resolved undefined weak symbol in executable. */
+ if (tls_type == GOT_TLS_IE_BOTH)
+ htab->elf.srelgot->size += 2 * htab->sizeof_reloc;
+ else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
+ || (tls_type & GOT_TLS_IE))
+ htab->elf.srelgot->size += htab->sizeof_reloc;
+ else if (GOT_TLS_GD_P (tls_type))
+ htab->elf.srelgot->size += 2 * htab->sizeof_reloc;
+ else if (! GOT_TLS_GDESC_P (tls_type)
+ && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+ && !resolved_to_zero)
+ || h->root.type != bfd_link_hash_undefweak)
+ && (bfd_link_pic (info)
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
+ htab->elf.srelgot->size += htab->sizeof_reloc;
+ if (GOT_TLS_GDESC_P (tls_type))
+ {
+ htab->elf.srelplt->size += htab->sizeof_reloc;
+ if (bed->target_id == X86_64_ELF_DATA)
+ htab->tlsdesc_plt = (bfd_vma) -1;
+ }
+ }
+ else
+ h->got.offset = (bfd_vma) -1;
+
+ if (eh->dyn_relocs == NULL)
+ return TRUE;
+
+ /* In the shared -Bsymbolic case, discard space allocated for
+ dynamic pc-relative relocs against symbols which turn out to be
+ defined in regular objects. For the normal shared case, discard
+ space for pc-relative relocs that have become local due to symbol
+ visibility changes. */
+
+ if (bfd_link_pic (info))
+ {
+ /* Relocs that use pc_count are those that appear on a call
+ insn, or certain REL relocs that can generated via assembly.
+ We want calls to protected symbols to resolve directly to the
+ function rather than going via the plt. If people want
+ function pointer comparisons to work as expected then they
+ should avoid writing weird assembly. */
+ if (SYMBOL_CALLS_LOCAL (info, h))
+ {
+ struct elf_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+
+ if (htab->is_vxworks)
+ {
+ struct elf_dyn_relocs **pp;
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+
+ /* Also discard relocs on undefined weak syms with non-default
+ visibility or in PIE. */
+ if (eh->dyn_relocs != NULL)
+ {
+ if (h->root.type == bfd_link_hash_undefweak)
+ {
+ /* Undefined weak symbol is never bound locally in shared
+ library. */
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ || resolved_to_zero)
+ {
+ if (bed->target_id == I386_ELF_DATA
+ && h->non_got_ref)
+ {
+ /* Keep dynamic non-GOT/non-PLT relocation so
+ that we can branch to 0 without PLT. */
+ struct elf_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ if (p->pc_count == 0)
+ *pp = p->next;
+ else
+ {
+ /* Remove non-R_386_PC32 relocation. */
+ p->count = p->pc_count;
+ pp = &p->next;
+ }
+
+ /* Make sure undefined weak symbols are output
+ as dynamic symbols in PIEs for dynamic non-GOT
+ non-PLT reloations. */
+ if (eh->dyn_relocs != NULL
+ && !bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+ else
+ eh->dyn_relocs = NULL;
+ }
+ else if (h->dynindx == -1
+ && !h->forced_local
+ && !bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+ else if (bfd_link_executable (info)
+ && (h->needs_copy || eh->needs_copy)
+ && h->def_dynamic
+ && !h->def_regular)
+ {
+ /* NB: needs_copy is set only for x86-64. For PIE,
+ discard space for pc-relative relocs against symbols
+ which turn out to need copy relocs. */
+ struct elf_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ if (p->pc_count != 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+ }
+ }
+ else if (ELIMINATE_COPY_RELOCS)
+ {
+ /* For the non-shared case, discard space for relocs against
+ symbols which turn out to need copy relocs or are not
+ dynamic. Keep dynamic relocations for run-time function
+ pointer initialization. */
+
+ if ((!h->non_got_ref
+ || eh->func_pointer_refcount > 0
+ || (h->root.type == bfd_link_hash_undefweak
+ && !resolved_to_zero))
+ && ((h->def_dynamic
+ && !h->def_regular)
+ || (htab->elf.dynamic_sections_created
+ && (h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined))))
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local
+ && !resolved_to_zero
+ && h->root.type == bfd_link_hash_undefweak
+ && ! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+
+ /* If that succeeded, we know we'll be keeping all the
+ relocs. */
+ if (h->dynindx != -1)
+ goto keep;
+ }
+
+ eh->dyn_relocs = NULL;
+ eh->func_pointer_refcount = 0;
+
+ keep: ;
+ }
+
+ /* Finally, allocate space. */
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *sreloc;
+
+ sreloc = elf_section_data (p->sec)->sreloc;
+
+ BFD_ASSERT (sreloc != NULL);
+ sreloc->size += p->count * htab->sizeof_reloc;
+ }
+
+ return TRUE;
+}
+
/* Find any dynamic relocs that apply to read-only sections. */
bfd_boolean
return TRUE;
}
+/* Allocate space in .plt, .got and associated reloc sections for
+ local dynamic relocs. */
+
+static bfd_boolean
+elf_x86_allocate_local_dynreloc (void **slot, void *inf)
+{
+ struct elf_link_hash_entry *h
+ = (struct elf_link_hash_entry *) *slot;
+
+ if (h->type != STT_GNU_IFUNC
+ || !h->def_regular
+ || !h->ref_regular
+ || !h->forced_local
+ || h->root.type != bfd_link_hash_defined)
+ abort ();
+
+ return elf_x86_allocate_dynrelocs (h, inf);
+}
+
/* Find and/or create a hash entry for local symbol. */
struct elf_link_hash_entry *
_bfd_elf_link_hash_table_free (obfd);
}
+static bfd_boolean
+elf_i386_is_reloc_section (const char *secname)
+{
+ return CONST_STRNEQ (secname, ".rel");
+}
+
+static bfd_boolean
+elf_x86_64_is_reloc_section (const char *secname)
+{
+ return CONST_STRNEQ (secname, ".rela");
+}
+
/* Create an x86 ELF linker hash table. */
struct bfd_link_hash_table *
return NULL;
}
-#ifdef BFD64
+ if (bed->target_id == X86_64_ELF_DATA)
+ {
+ ret->is_reloc_section = elf_x86_64_is_reloc_section;
+ ret->dt_reloc = DT_RELA;
+ ret->dt_reloc_sz = DT_RELASZ;
+ ret->dt_reloc_ent = DT_RELAENT;
+ ret->got_entry_size = 8;
+ ret->tls_get_addr = "__tls_get_addr";
+ }
if (ABI_64_P (abfd))
{
- ret->r_info = elf64_r_info;
- ret->r_sym = elf64_r_sym;
ret->sizeof_reloc = sizeof (Elf64_External_Rela);
- ret->got_entry_size = 8;
ret->pointer_r_type = R_X86_64_64;
ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
- ret->tls_get_addr = "__tls_get_addr";
}
else
-#endif
{
- ret->r_info = elf32_r_info;
- ret->r_sym = elf32_r_sym;
if (bed->target_id == X86_64_ELF_DATA)
{
ret->sizeof_reloc = sizeof (Elf32_External_Rela);
- ret->got_entry_size = 8;
ret->pointer_r_type = R_X86_64_32;
ret->dynamic_interpreter = ELFX32_DYNAMIC_INTERPRETER;
ret->dynamic_interpreter_size
= sizeof ELFX32_DYNAMIC_INTERPRETER;
- ret->tls_get_addr = "__tls_get_addr";
}
else
{
+ ret->is_reloc_section = elf_i386_is_reloc_section;
+ ret->dt_reloc = DT_REL;
+ ret->dt_reloc_sz = DT_RELSZ;
+ ret->dt_reloc_ent = DT_RELENT;
ret->sizeof_reloc = sizeof (Elf32_External_Rel);
ret->got_entry_size = 4;
ret->pointer_r_type = R_386_32;
ret->tls_get_addr = "___tls_get_addr";
}
}
+ ret->target_id = bed->target_id;
ret->loc_hash_table = htab_try_create (1024,
_bfd_x86_elf_local_htab_hash,
htab = elf_x86_hash_table (info, bed->target_id);
if (htab)
{
- struct elf_link_hash_entry *h
- = elf_link_hash_lookup (elf_hash_table (info),
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (info),
htab->tls_get_addr,
FALSE, FALSE, FALSE);
if (h != NULL)
- ((struct elf_x86_link_hash_entry *) h)->tls_get_addr = 1;
+ elf_x86_hash_entry (h)->tls_get_addr = 1;
+
+ /* "__ehdr_start" will be defined by linker as a hidden symbol
+ later if it is referenced and not defined. */
+ h = elf_link_hash_lookup (elf_hash_table (info),
+ "__ehdr_start",
+ FALSE, FALSE, FALSE);
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_new
+ || h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_common))
+ {
+ elf_x86_hash_entry (h)->local_ref = 2;
+ elf_x86_hash_entry (h)->linker_def = 1;
+ }
}
}
return _bfd_elf_link_check_relocs (abfd, info);
}
+/* Set the sizes of the dynamic sections. */
+
+bfd_boolean
+_bfd_x86_elf_size_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ struct elf_x86_link_hash_table *htab;
+ bfd *dynobj;
+ asection *s;
+ bfd_boolean relocs;
+ bfd *ibfd;
+ const struct elf_backend_data *bed
+ = get_elf_backend_data (output_bfd);
+
+ htab = elf_x86_hash_table (info, bed->target_id);
+ if (htab == NULL)
+ return FALSE;
+ dynobj = htab->elf.dynobj;
+ if (dynobj == NULL)
+ abort ();
+
+ /* Set up .got offsets for local syms, and space for local dynamic
+ relocs. */
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
+ {
+ bfd_signed_vma *local_got;
+ bfd_signed_vma *end_local_got;
+ char *local_tls_type;
+ bfd_vma *local_tlsdesc_gotent;
+ bfd_size_type locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+ asection *srel;
+
+ if (! is_x86_elf (ibfd, htab))
+ continue;
+
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ {
+ struct elf_dyn_relocs *p;
+
+ for (p = ((struct elf_dyn_relocs *)
+ elf_section_data (s)->local_dynrel);
+ p != NULL;
+ p = p->next)
+ {
+ if (!bfd_is_abs_section (p->sec)
+ && bfd_is_abs_section (p->sec->output_section))
+ {
+ /* Input section has been discarded, either because
+ it is a copy of a linkonce section or due to
+ linker script /DISCARD/, so we'll be discarding
+ the relocs too. */
+ }
+ else if (htab->is_vxworks
+ && strcmp (p->sec->output_section->name,
+ ".tls_vars") == 0)
+ {
+ /* Relocations in vxworks .tls_vars sections are
+ handled specially by the loader. */
+ }
+ else if (p->count != 0)
+ {
+ srel = elf_section_data (p->sec)->sreloc;
+ srel->size += p->count * htab->sizeof_reloc;
+ if ((p->sec->output_section->flags & SEC_READONLY) != 0
+ && (info->flags & DF_TEXTREL) == 0)
+ {
+ info->flags |= DF_TEXTREL;
+ if ((info->warn_shared_textrel && bfd_link_pic (info))
+ || info->error_textrel)
+ /* xgettext:c-format */
+ info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
+ p->sec->owner, p->sec);
+ }
+ }
+ }
+ }
+
+ local_got = elf_local_got_refcounts (ibfd);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_symtab_hdr (ibfd);
+ locsymcount = symtab_hdr->sh_info;
+ end_local_got = local_got + locsymcount;
+ local_tls_type = elf_x86_local_got_tls_type (ibfd);
+ local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
+ s = htab->elf.sgot;
+ srel = htab->elf.srelgot;
+ for (; local_got < end_local_got;
+ ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
+ {
+ *local_tlsdesc_gotent = (bfd_vma) -1;
+ if (*local_got > 0)
+ {
+ if (GOT_TLS_GDESC_P (*local_tls_type))
+ {
+ *local_tlsdesc_gotent = htab->elf.sgotplt->size
+ - elf_x86_compute_jump_table_size (htab);
+ htab->elf.sgotplt->size += 2 * htab->got_entry_size;
+ *local_got = (bfd_vma) -2;
+ }
+ if (! GOT_TLS_GDESC_P (*local_tls_type)
+ || GOT_TLS_GD_P (*local_tls_type))
+ {
+ *local_got = s->size;
+ s->size += htab->got_entry_size;
+ if (GOT_TLS_GD_P (*local_tls_type)
+ || *local_tls_type == GOT_TLS_IE_BOTH)
+ s->size += htab->got_entry_size;
+ }
+ if (bfd_link_pic (info)
+ || GOT_TLS_GD_ANY_P (*local_tls_type)
+ || (*local_tls_type & GOT_TLS_IE))
+ {
+ if (*local_tls_type == GOT_TLS_IE_BOTH)
+ srel->size += 2 * htab->sizeof_reloc;
+ else if (GOT_TLS_GD_P (*local_tls_type)
+ || ! GOT_TLS_GDESC_P (*local_tls_type))
+ srel->size += htab->sizeof_reloc;
+ if (GOT_TLS_GDESC_P (*local_tls_type))
+ {
+ htab->elf.srelplt->size += htab->sizeof_reloc;
+ if (bed->target_id == X86_64_ELF_DATA)
+ htab->tlsdesc_plt = (bfd_vma) -1;
+ }
+ }
+ }
+ else
+ *local_got = (bfd_vma) -1;
+ }
+ }
+
+ if (htab->tls_ld_or_ldm_got.refcount > 0)
+ {
+ /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
+ or R_X86_64_TLSLD relocs. */
+ htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
+ htab->elf.sgot->size += 2 * htab->got_entry_size;
+ htab->elf.srelgot->size += htab->sizeof_reloc;
+ }
+ else
+ htab->tls_ld_or_ldm_got.offset = -1;
+
+ /* Allocate global sym .plt and .got entries, and space for global
+ sym dynamic relocs. */
+ elf_link_hash_traverse (&htab->elf, elf_x86_allocate_dynrelocs,
+ info);
+
+ /* Allocate .plt and .got entries, and space for local symbols. */
+ htab_traverse (htab->loc_hash_table, elf_x86_allocate_local_dynreloc,
+ info);
+
+ /* For every jump slot reserved in the sgotplt, reloc_count is
+ incremented. However, when we reserve space for TLS descriptors,
+ it's not incremented, so in order to compute the space reserved
+ for them, it suffices to multiply the reloc count by the jump
+ slot size.
+
+ PR ld/13302: We start next_irelative_index at the end of .rela.plt
+ so that R_{386,X86_64}_IRELATIVE entries come last. */
+ if (htab->elf.srelplt)
+ {
+ htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
+ htab->sgotplt_jump_table_size
+ = elf_x86_compute_jump_table_size (htab);
+ htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
+ }
+ else if (htab->elf.irelplt)
+ htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
+
+ if (htab->tlsdesc_plt)
+ {
+ /* NB: tlsdesc_plt is set only for x86-64. If we're not using
+ lazy TLS relocations, don't generate the PLT and GOT entries
+ they require. */
+ if ((info->flags & DF_BIND_NOW))
+ htab->tlsdesc_plt = 0;
+ else
+ {
+ htab->tlsdesc_got = htab->elf.sgot->size;
+ htab->elf.sgot->size += htab->got_entry_size;
+ /* Reserve room for the initial entry.
+ FIXME: we could probably do away with it in this case. */
+ if (htab->elf.splt->size == 0)
+ htab->elf.splt->size = htab->plt.plt_entry_size;
+ htab->tlsdesc_plt = htab->elf.splt->size;
+ htab->elf.splt->size += htab->plt.plt_entry_size;
+ }
+ }
+
+ if (htab->elf.sgotplt)
+ {
+ /* Don't allocate .got.plt section if there are no GOT nor PLT
+ entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
+ if ((htab->elf.hgot == NULL
+ || !htab->elf.hgot->ref_regular_nonweak)
+ && (htab->elf.sgotplt->size == bed->got_header_size)
+ && (htab->elf.splt == NULL
+ || htab->elf.splt->size == 0)
+ && (htab->elf.sgot == NULL
+ || htab->elf.sgot->size == 0)
+ && (htab->elf.iplt == NULL
+ || htab->elf.iplt->size == 0)
+ && (htab->elf.igotplt == NULL
+ || htab->elf.igotplt->size == 0))
+ htab->elf.sgotplt->size = 0;
+ }
+
+ if (_bfd_elf_eh_frame_present (info))
+ {
+ if (htab->plt_eh_frame != NULL
+ && htab->elf.splt != NULL
+ && htab->elf.splt->size != 0
+ && !bfd_is_abs_section (htab->elf.splt->output_section))
+ htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
+
+ if (htab->plt_got_eh_frame != NULL
+ && htab->plt_got != NULL
+ && htab->plt_got->size != 0
+ && !bfd_is_abs_section (htab->plt_got->output_section))
+ htab->plt_got_eh_frame->size
+ = htab->non_lazy_plt->eh_frame_plt_size;
+
+ /* Unwind info for the second PLT and .plt.got sections are
+ identical. */
+ if (htab->plt_second_eh_frame != NULL
+ && htab->plt_second != NULL
+ && htab->plt_second->size != 0
+ && !bfd_is_abs_section (htab->plt_second->output_section))
+ htab->plt_second_eh_frame->size
+ = htab->non_lazy_plt->eh_frame_plt_size;
+ }
+
+ /* We now have determined the sizes of the various dynamic sections.
+ Allocate memory for them. */
+ relocs = FALSE;
+ for (s = dynobj->sections; s != NULL; s = s->next)
+ {
+ bfd_boolean strip_section = TRUE;
+
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
+ continue;
+
+ if (s == htab->elf.splt
+ || s == htab->elf.sgot)
+ {
+ /* Strip this section if we don't need it; see the
+ comment below. */
+ /* We'd like to strip these sections if they aren't needed, but if
+ we've exported dynamic symbols from them we must leave them.
+ It's too late to tell BFD to get rid of the symbols. */
+
+ if (htab->elf.hplt != NULL)
+ strip_section = FALSE;
+ }
+ else if (s == htab->elf.sgotplt
+ || s == htab->elf.iplt
+ || s == htab->elf.igotplt
+ || s == htab->plt_second
+ || s == htab->plt_got
+ || s == htab->plt_eh_frame
+ || s == htab->plt_got_eh_frame
+ || s == htab->plt_second_eh_frame
+ || s == htab->elf.sdynbss
+ || s == htab->elf.sdynrelro)
+ {
+ /* Strip these too. */
+ }
+ else if (htab->is_reloc_section (bfd_get_section_name (dynobj, s)))
+ {
+ if (s->size != 0
+ && s != htab->elf.srelplt
+ && s != htab->srelplt2)
+ relocs = TRUE;
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ if (s != htab->elf.srelplt)
+ s->reloc_count = 0;
+ }
+ else
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (s->size == 0)
+ {
+ /* If we don't need this section, strip it from the
+ output file. This is mostly to handle .rel.bss and
+ .rel.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ if (strip_section)
+ s->flags |= SEC_EXCLUDE;
+ continue;
+ }
+
+ if ((s->flags & SEC_HAS_CONTENTS) == 0)
+ continue;
+
+ /* Allocate memory for the section contents. We use bfd_zalloc
+ here in case unused entries are not reclaimed before the
+ section's contents are written out. This should not happen,
+ but this way if it does, we get a R_386_NONE or R_X86_64_NONE
+ reloc instead of garbage. */
+ s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
+
+ if (htab->plt_eh_frame != NULL
+ && htab->plt_eh_frame->contents != NULL)
+ {
+ memcpy (htab->plt_eh_frame->contents,
+ htab->plt.eh_frame_plt,
+ htab->plt_eh_frame->size);
+ bfd_put_32 (dynobj, htab->elf.splt->size,
+ htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
+ }
+
+ if (htab->plt_got_eh_frame != NULL
+ && htab->plt_got_eh_frame->contents != NULL)
+ {
+ memcpy (htab->plt_got_eh_frame->contents,
+ htab->non_lazy_plt->eh_frame_plt,
+ htab->plt_got_eh_frame->size);
+ bfd_put_32 (dynobj, htab->plt_got->size,
+ (htab->plt_got_eh_frame->contents
+ + PLT_FDE_LEN_OFFSET));
+ }
+
+ if (htab->plt_second_eh_frame != NULL
+ && htab->plt_second_eh_frame->contents != NULL)
+ {
+ memcpy (htab->plt_second_eh_frame->contents,
+ htab->non_lazy_plt->eh_frame_plt,
+ htab->plt_second_eh_frame->size);
+ bfd_put_32 (dynobj, htab->plt_second->size,
+ (htab->plt_second_eh_frame->contents
+ + PLT_FDE_LEN_OFFSET));
+ }
+
+ if (htab->elf.dynamic_sections_created)
+ {
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in elf_{i386,x86_64}_finish_dynamic_sections,
+ but we must add the entries now so that we get the correct
+ size for the .dynamic section. The DT_DEBUG entry is filled
+ in by the dynamic linker and used by the debugger. */
+#define add_dynamic_entry(TAG, VAL) \
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+
+ if (bfd_link_executable (info))
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
+
+ if (htab->elf.splt->size != 0)
+ {
+ /* DT_PLTGOT is used by prelink even if there is no PLT
+ relocation. */
+ if (!add_dynamic_entry (DT_PLTGOT, 0))
+ return FALSE;
+ }
+
+ if (htab->elf.srelplt->size != 0)
+ {
+ if (!add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, htab->dt_reloc)
+ || !add_dynamic_entry (DT_JMPREL, 0))
+ return FALSE;
+ }
+
+ if (htab->tlsdesc_plt
+ && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
+ || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
+ return FALSE;
+
+ if (relocs)
+ {
+ if (!add_dynamic_entry (htab->dt_reloc, 0)
+ || !add_dynamic_entry (htab->dt_reloc_sz, 0)
+ || !add_dynamic_entry (htab->dt_reloc_ent,
+ htab->sizeof_reloc))
+ return FALSE;
+
+ /* If any dynamic relocs apply to a read-only section,
+ then we need a DT_TEXTREL entry. */
+ if ((info->flags & DF_TEXTREL) == 0)
+ elf_link_hash_traverse (&htab->elf,
+ _bfd_x86_elf_readonly_dynrelocs,
+ info);
+
+ if ((info->flags & DF_TEXTREL) != 0)
+ {
+ if (htab->readonly_dynrelocs_against_ifunc)
+ {
+ info->callbacks->einfo
+ (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
+ }
+ }
+ if (htab->is_vxworks
+ && !elf_vxworks_add_dynamic_entries (output_bfd, info))
+ return FALSE;
+ }
+#undef add_dynamic_entry
+
+ return TRUE;
+}
+
bfd_boolean
_bfd_x86_elf_always_size_sections (bfd *output_bfd,
struct bfd_link_info *info)
_bfd_x86_elf_fixup_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h)
{
- if (h->dynindx != -1)
+ if (h->dynindx != -1
+ && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, elf_x86_hash_entry (h)))
{
- const struct elf_backend_data *bed
- = get_elf_backend_data (info->output_bfd);
- if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
- bed->target_id,
- elf_x86_hash_entry (h)->has_got_reloc,
- elf_x86_hash_entry (h)))
- {
- h->dynindx = -1;
- _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
- h->dynstr_index);
- }
+ h->dynindx = -1;
+ _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
+ h->dynstr_index);
}
return TRUE;
}
return _bfd_elf_adjust_dynamic_copy (info, h, s);
}
+/* Return TRUE if a symbol is referenced locally. It is similar to
+ SYMBOL_REFERENCES_LOCAL, but it also checks version script. It
+ works in check_relocs. */
+
+bfd_boolean
+_bfd_x86_elf_link_symbol_references_local (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
+{
+ struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h);
+ struct elf_x86_link_hash_table *htab
+ = (struct elf_x86_link_hash_table *) info->hash;
+
+ if (eh->local_ref > 1)
+ return TRUE;
+
+ if (eh->local_ref == 1)
+ return FALSE;
+
+ /* Unversioned symbols defined in regular objects can be forced local
+ by linker version script. A weak undefined symbol is forced local
+ if
+ 1. It has non-default visibility. Or
+ 2. When building executable, there is no dynamic linker. Or
+ 3. or "-z nodynamic-undefined-weak" is used.
+ */
+ if (SYMBOL_REFERENCES_LOCAL (info, h)
+ || (h->root.type == bfd_link_hash_undefweak
+ && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ || (bfd_link_executable (info)
+ && htab->interp == NULL)
+ || info->dynamic_undefined_weak == 0))
+ || ((h->def_regular || ELF_COMMON_DEF_P (h))
+ && h->versioned == unversioned
+ && info->version_info != NULL
+ && bfd_hide_sym_by_version (info->version_info,
+ h->root.root.string)))
+ {
+ eh->local_ref = 2;
+ return TRUE;
+ }
+
+ eh->local_ref = 1;
+ return FALSE;
+}
+
/* Return the section that should be marked against GC for a given
relocation. */
bfd *
_bfd_x86_elf_link_setup_gnu_properties
- (struct bfd_link_info *info,
- struct elf_x86_plt_layout_table *plt_layout)
+ (struct bfd_link_info *info, struct elf_x86_init_table *init_table)
{
bfd_boolean normal_target;
bfd_boolean lazy_plt;
pbfd = _bfd_elf_link_setup_gnu_properties (info);
- if (bfd_link_relocatable (info))
- return pbfd;
-
bed = get_elf_backend_data (info->output_bfd);
htab = elf_x86_hash_table (info, bed->target_id);
if (htab == NULL)
return pbfd;
- htab->is_vxworks = plt_layout->is_vxworks;
+ htab->is_vxworks = init_table->is_vxworks;
+ htab->r_info = init_table->r_info;
+ htab->r_sym = init_table->r_sym;
+
+ if (bfd_link_relocatable (info))
+ return pbfd;
use_ibt_plt = info->ibtplt || info->ibt;
if (!use_ibt_plt && pbfd != NULL)
still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
canonical function address. */
htab->plt.has_plt0 = 1;
- normal_target = plt_layout->normal_target;
+ normal_target = init_table->normal_target;
if (normal_target)
{
if (use_ibt_plt)
{
- htab->lazy_plt = plt_layout->lazy_ibt_plt;
- htab->non_lazy_plt = plt_layout->non_lazy_ibt_plt;
+ htab->lazy_plt = init_table->lazy_ibt_plt;
+ htab->non_lazy_plt = init_table->non_lazy_ibt_plt;
}
else
{
- htab->lazy_plt = plt_layout->lazy_plt;
- htab->non_lazy_plt = plt_layout->non_lazy_plt;
+ htab->lazy_plt = init_table->lazy_plt;
+ htab->non_lazy_plt = init_table->non_lazy_plt;
}
}
else
{
- htab->lazy_plt = plt_layout->lazy_plt;
+ htab->lazy_plt = init_table->lazy_plt;
htab->non_lazy_plt = NULL;
}
projects / deliverable / binutils-gdb.git / blobdiff