/* ELF linking support for BFD.
- Copyright (C) 1995-2016 Free Software Foundation, Inc.
+ Copyright (C) 1995-2017 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
struct elf_link_hash_table *htab = elf_hash_table (info);
/* This function may be called more than once. */
- s = bfd_get_linker_section (abfd, ".got");
- if (s != NULL)
+ if (htab->sgot != NULL)
return TRUE;
flags = bed->dynamic_sec_flags;
(SEC_ALLOC | SEC_LINKER_CREATED));
if (s == NULL)
return FALSE;
+ htab->sdynbss = s;
+
+ if (bed->want_dynrelro)
+ {
+ /* Similarly, but for symbols that were originally in read-only
+ sections. */
+ s = bfd_make_section_anyway_with_flags (abfd, ".data.rel.ro",
+ (SEC_ALLOC | SEC_READONLY
+ | SEC_HAS_CONTENTS
+ | SEC_LINKER_CREATED));
+ if (s == NULL)
+ return FALSE;
+ htab->sdynrelro = s;
+ }
/* The .rel[a].bss section holds copy relocs. This section is not
normally needed. We need to create it here, though, so that the
be needed, we can discard it later. We will never need this
section when generating a shared object, since they do not use
copy relocs. */
- if (! bfd_link_pic (info))
+ if (bfd_link_executable (info))
{
s = bfd_make_section_anyway_with_flags (abfd,
(bed->rela_plts_and_copies_p
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
return FALSE;
+ htab->srelbss = s;
+
+ if (bed->want_dynrelro)
+ {
+ s = (bfd_make_section_anyway_with_flags
+ (abfd, (bed->rela_plts_and_copies_p
+ ? ".rela.data.rel.ro" : ".rel.data.rel.ro"),
+ flags | SEC_READONLY));
+ if (s == NULL
+ || ! bfd_set_section_alignment (abfd, s,
+ bed->s->log_file_align))
+ return FALSE;
+ htab->sreldynrelro = s;
+ }
}
}
if (h == NULL)
return provide;
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
if (h->versioned == unknown)
{
/* Set versioned if symbol version is unknown. */
hv->root.u.i.link = (struct bfd_link_hash_entry *) h;
(*bed->elf_backend_copy_indirect_symbol) (info, h, hv);
break;
- case bfd_link_hash_warning:
- abort ();
- break;
+ default:
+ BFD_FAIL ();
+ return FALSE;
}
/* If this symbol is being provided by the linker script, and it is
&& !h->def_regular)
h->verinfo.verdef = NULL;
+ /* Make sure this symbol is not garbage collected. */
+ h->mark = 1;
+
h->def_regular = 1;
if (hidden)
&& (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0)
h->def_regular = 1;
+ /* If a weak undefined symbol has non-default visibility, we also
+ hide it from the dynamic linker. */
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak)
+ (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE);
+
+ /* A hidden versioned symbol in executable should be forced local if
+ it is is locally defined, not referenced by shared library and not
+ exported. */
+ else if (bfd_link_executable (eif->info)
+ && h->versioned == versioned_hidden
+ && !eif->info->export_dynamic
+ && !h->dynamic
+ && !h->ref_dynamic
+ && h->def_regular)
+ (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE);
+
/* If -Bsymbolic was used (which means to bind references to global
symbols to the definition within the shared object), and this
symbol was defined in a regular object, then it actually doesn't
need a PLT entry. Likewise, if the symbol has non-default
visibility. If the symbol has hidden or internal visibility, we
will force it local. */
- if (h->needs_plt
- && bfd_link_pic (eif->info)
- && is_elf_hash_table (eif->info->hash)
- && (SYMBOLIC_BIND (eif->info, h)
- || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
- && h->def_regular)
+ else if (h->needs_plt
+ && bfd_link_pic (eif->info)
+ && is_elf_hash_table (eif->info->hash)
+ && (SYMBOLIC_BIND (eif->info, h)
+ || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
+ && h->def_regular)
{
bfd_boolean force_local;
(*bed->elf_backend_hide_symbol) (eif->info, h, force_local);
}
- /* If a weak undefined symbol has non-default visibility, we also
- hide it from the dynamic linker. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak)
- (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE);
-
/* If this is a weak defined symbol in a dynamic object, and we know
the real definition in the dynamic object, copy interesting flags
over to the real definition. */
const char *soname = NULL;
char *audit = NULL;
struct bfd_link_needed_list *rpath = NULL, *runpath = NULL;
+ const Elf_Internal_Phdr *phdr;
int ret;
/* ld --just-symbols and dynamic objects don't mix very well.
*pn = rpath;
}
+ /* If we have a PT_GNU_RELRO program header, mark as read-only
+ all sections contained fully therein. This makes relro
+ shared library sections appear as they will at run-time. */
+ phdr = elf_tdata (abfd)->phdr + elf_elfheader (abfd)->e_phnum;
+ while (--phdr >= elf_tdata (abfd)->phdr)
+ if (phdr->p_type == PT_GNU_RELRO)
+ {
+ for (s = abfd->sections; s != NULL; s = s->next)
+ if ((s->flags & SEC_ALLOC) != 0
+ && s->vma >= phdr->p_vaddr
+ && s->vma + s->size <= phdr->p_vaddr + phdr->p_memsz)
+ s->flags |= SEC_READONLY;
+ break;
+ }
+
/* We do not want to include any of the sections in a dynamic
object in the output file. We hack by simply clobbering the
list of sections in the BFD. This could be handled more
return TRUE;
}
+/* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
+
+struct elf_gc_sweep_symbol_info
+{
+ struct bfd_link_info *info;
+ void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *,
+ bfd_boolean);
+};
+
+static bfd_boolean
+elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data)
+{
+ if (!h->mark
+ && (((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && !((h->def_regular || ELF_COMMON_DEF_P (h))
+ && h->root.u.def.section->gc_mark))
+ || h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ struct elf_gc_sweep_symbol_info *inf;
+
+ inf = (struct elf_gc_sweep_symbol_info *) data;
+ (*inf->hide_symbol) (inf->info, h, TRUE);
+ h->def_regular = 0;
+ h->ref_regular = 0;
+ h->ref_regular_nonweak = 0;
+ }
+
+ return TRUE;
+}
+
/* Set up the sizes and contents of the ELF dynamic sections. This is
called by the ELF linker emulation before_allocation routine. We
must set the sizes of the sections before the linker sets the
size_t soname_indx;
bfd *dynobj;
const struct elf_backend_data *bed;
- struct elf_info_failed asvinfo;
*sinterpptr = NULL;
if (!is_elf_hash_table (info->hash))
return TRUE;
- bed = get_elf_backend_data (output_bfd);
-
- /* Any syms created from now on start with -1 in
- got.refcount/offset and plt.refcount/offset. */
- elf_hash_table (info)->init_got_refcount
- = elf_hash_table (info)->init_got_offset;
- elf_hash_table (info)->init_plt_refcount
- = elf_hash_table (info)->init_plt_offset;
-
- if (bfd_link_relocatable (info)
- && !_bfd_elf_size_group_sections (info))
- return FALSE;
-
- /* The backend may have to create some sections regardless of whether
- we're dynamic or not. */
- if (bed->elf_backend_always_size_sections
- && ! (*bed->elf_backend_always_size_sections) (output_bfd, info))
- return FALSE;
-
- /* Determine any GNU_STACK segment requirements, after the backend
- has had a chance to set a default segment size. */
- if (info->execstack)
- elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X;
- else if (info->noexecstack)
- elf_stack_flags (output_bfd) = PF_R | PF_W;
- else
- {
- bfd *inputobj;
- asection *notesec = NULL;
- int exec = 0;
-
- for (inputobj = info->input_bfds;
- inputobj;
- inputobj = inputobj->link.next)
- {
- asection *s;
-
- if (inputobj->flags
- & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED))
- continue;
- s = bfd_get_section_by_name (inputobj, ".note.GNU-stack");
- if (s)
- {
- if (s->flags & SEC_CODE)
- exec = PF_X;
- notesec = s;
- }
- else if (bed->default_execstack)
- exec = PF_X;
- }
- if (notesec || info->stacksize > 0)
- elf_stack_flags (output_bfd) = PF_R | PF_W | exec;
- if (notesec && exec && bfd_link_relocatable (info)
- && notesec->output_section != bfd_abs_section_ptr)
- notesec->output_section->flags |= SEC_CODE;
- }
-
dynobj = elf_hash_table (info)->dynobj;
if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created)
{
- struct elf_info_failed eif;
- struct elf_link_hash_entry *h;
- asection *dynstr;
+ struct bfd_elf_version_tree *verdefs;
+ struct elf_info_failed asvinfo;
struct bfd_elf_version_tree *t;
struct bfd_elf_version_expr *d;
- asection *s;
+ struct elf_info_failed eif;
bfd_boolean all_defined;
-
- *sinterpptr = bfd_get_linker_section (dynobj, ".interp");
- BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp);
-
- if (soname != NULL)
- {
- soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- soname, TRUE);
- if (soname_indx == (size_t) -1
- || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx))
- return FALSE;
- }
-
- if (info->symbolic)
- {
- if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0))
- return FALSE;
- info->flags |= DF_SYMBOLIC;
- }
-
- if (rpath != NULL)
- {
- size_t indx;
- bfd_vma tag;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath,
- TRUE);
- if (indx == (size_t) -1)
- return FALSE;
-
- tag = info->new_dtags ? DT_RUNPATH : DT_RPATH;
- if (!_bfd_elf_add_dynamic_entry (info, tag, indx))
- return FALSE;
- }
-
- if (filter_shlib != NULL)
- {
- size_t indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- filter_shlib, TRUE);
- if (indx == (size_t) -1
- || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx))
- return FALSE;
- }
-
- if (auxiliary_filters != NULL)
- {
- const char * const *p;
-
- for (p = auxiliary_filters; *p != NULL; p++)
- {
- size_t indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- *p, TRUE);
- if (indx == (size_t) -1
- || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx))
- return FALSE;
- }
- }
-
- if (audit != NULL)
- {
- size_t indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit,
- TRUE);
- if (indx == (size_t) -1
- || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx))
- return FALSE;
- }
-
- if (depaudit != NULL)
- {
- size_t indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit,
- TRUE);
- if (indx == (size_t) -1
- || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx))
- return FALSE;
- }
+ asection *s;
eif.info = info;
eif.failed = FALSE;
}
}
- /* Find all symbols which were defined in a dynamic object and make
- the backend pick a reasonable value for them. */
- elf_link_hash_traverse (elf_hash_table (info),
- _bfd_elf_adjust_dynamic_symbol,
- &eif);
- if (eif.failed)
- return FALSE;
+ /* Set up the version definition section. */
+ s = bfd_get_linker_section (dynobj, ".gnu.version_d");
+ BFD_ASSERT (s != NULL);
- /* Add some entries to the .dynamic section. We fill in some of the
- values later, in bfd_elf_final_link, but we must add the entries
- now so that we know the final size of the .dynamic section. */
+ /* We may have created additional version definitions if we are
+ just linking a regular application. */
+ verdefs = info->version_info;
- /* If there are initialization and/or finalization functions to
- call then add the corresponding DT_INIT/DT_FINI entries. */
- h = (info->init_function
- ? elf_link_hash_lookup (elf_hash_table (info),
- info->init_function, FALSE,
- FALSE, FALSE)
- : NULL);
- if (h != NULL
- && (h->ref_regular
- || h->def_regular))
- {
- if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0))
- return FALSE;
- }
- h = (info->fini_function
- ? elf_link_hash_lookup (elf_hash_table (info),
- info->fini_function, FALSE,
- FALSE, FALSE)
- : NULL);
- if (h != NULL
- && (h->ref_regular
- || h->def_regular))
- {
- if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0))
- return FALSE;
- }
-
- s = bfd_get_section_by_name (output_bfd, ".preinit_array");
- if (s != NULL && s->linker_has_input)
- {
- /* DT_PREINIT_ARRAY is not allowed in shared library. */
- if (! bfd_link_executable (info))
- {
- bfd *sub;
- asection *o;
-
- for (sub = info->input_bfds; sub != NULL;
- sub = sub->link.next)
- if (bfd_get_flavour (sub) == bfd_target_elf_flavour)
- for (o = sub->sections; o != NULL; o = o->next)
- if (elf_section_data (o)->this_hdr.sh_type
- == SHT_PREINIT_ARRAY)
- {
- _bfd_error_handler
- (_("%B: .preinit_array section is not allowed in DSO"),
- sub);
- break;
- }
-
- bfd_set_error (bfd_error_nonrepresentable_section);
- return FALSE;
- }
-
- if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0))
- return FALSE;
- }
- s = bfd_get_section_by_name (output_bfd, ".init_array");
- if (s != NULL && s->linker_has_input)
- {
- if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0))
- return FALSE;
- }
- s = bfd_get_section_by_name (output_bfd, ".fini_array");
- if (s != NULL && s->linker_has_input)
- {
- if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0))
- return FALSE;
- }
-
- dynstr = bfd_get_linker_section (dynobj, ".dynstr");
- /* If .dynstr is excluded from the link, we don't want any of
- these tags. Strictly, we should be checking each section
- individually; This quick check covers for the case where
- someone does a /DISCARD/ : { *(*) }. */
- if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr)
- {
- bfd_size_type strsize;
-
- strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
- if ((info->emit_hash
- && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0))
- || (info->emit_gnu_hash
- && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0))
- || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize)
- || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT,
- bed->s->sizeof_sym))
- return FALSE;
- }
- }
-
- if (! _bfd_elf_maybe_strip_eh_frame_hdr (info))
- return FALSE;
-
- /* The backend must work out the sizes of all the other dynamic
- sections. */
- if (dynobj != NULL
- && bed->elf_backend_size_dynamic_sections != NULL
- && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
- return FALSE;
-
- if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created)
- {
- unsigned long section_sym_count;
- struct bfd_elf_version_tree *verdefs;
- asection *s;
-
- /* Set up the version definition section. */
- s = bfd_get_linker_section (dynobj, ".gnu.version_d");
- BFD_ASSERT (s != NULL);
-
- /* We may have created additional version definitions if we are
- just linking a regular application. */
- verdefs = info->version_info;
-
- /* Skip anonymous version tag. */
- if (verdefs != NULL && verdefs->vernum == 0)
- verdefs = verdefs->next;
-
- if (verdefs == NULL && !info->create_default_symver)
- s->flags |= SEC_EXCLUDE;
- else
+ /* Skip anonymous version tag. */
+ if (verdefs != NULL && verdefs->vernum == 0)
+ verdefs = verdefs->next;
+
+ if (verdefs == NULL && !info->create_default_symver)
+ s->flags |= SEC_EXCLUDE;
+ else
{
unsigned int cdefs;
bfd_size_type size;
- struct bfd_elf_version_tree *t;
bfd_byte *p;
Elf_Internal_Verdef def;
Elf_Internal_Verdaux defaux;
def.vd_aux = sizeof (Elf_External_Verdef);
def.vd_next = 0;
- /* If a basever node is next, it *must* be the last node in
- the chain, otherwise Verdef construction breaks. */
- if (t->next != NULL && t->next->vernum == 0)
- BFD_ASSERT (t->next->next == NULL);
+ /* If a basever node is next, it *must* be the last node in
+ the chain, otherwise Verdef construction breaks. */
+ if (t->next != NULL && t->next->vernum == 0)
+ BFD_ASSERT (t->next->next == NULL);
+
+ if (t->next != NULL && t->next->vernum != 0)
+ def.vd_next = (sizeof (Elf_External_Verdef)
+ + (cdeps + 1) * sizeof (Elf_External_Verdaux));
+
+ _bfd_elf_swap_verdef_out (output_bfd, &def,
+ (Elf_External_Verdef *) p);
+ p += sizeof (Elf_External_Verdef);
+
+ defaux.vda_name = h->dynstr_index;
+ _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
+ h->dynstr_index);
+ defaux.vda_next = 0;
+ if (t->deps != NULL)
+ defaux.vda_next = sizeof (Elf_External_Verdaux);
+ t->name_indx = defaux.vda_name;
+
+ _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
+ (Elf_External_Verdaux *) p);
+ p += sizeof (Elf_External_Verdaux);
+
+ for (n = t->deps; n != NULL; n = n->next)
+ {
+ if (n->version_needed == NULL)
+ {
+ /* This can happen if there was an error in the
+ version script. */
+ defaux.vda_name = 0;
+ }
+ else
+ {
+ defaux.vda_name = n->version_needed->name_indx;
+ _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
+ defaux.vda_name);
+ }
+ if (n->next == NULL)
+ defaux.vda_next = 0;
+ else
+ defaux.vda_next = sizeof (Elf_External_Verdaux);
+
+ _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
+ (Elf_External_Verdaux *) p);
+ p += sizeof (Elf_External_Verdaux);
+ }
+ }
+
+ elf_tdata (output_bfd)->cverdefs = cdefs;
+ }
+
+ /* Work out the size of the version reference section. */
+
+ s = bfd_get_linker_section (dynobj, ".gnu.version_r");
+ BFD_ASSERT (s != NULL);
+ {
+ struct elf_find_verdep_info sinfo;
+
+ sinfo.info = info;
+ sinfo.vers = elf_tdata (output_bfd)->cverdefs;
+ if (sinfo.vers == 0)
+ sinfo.vers = 1;
+ sinfo.failed = FALSE;
+
+ elf_link_hash_traverse (elf_hash_table (info),
+ _bfd_elf_link_find_version_dependencies,
+ &sinfo);
+ if (sinfo.failed)
+ return FALSE;
+
+ if (elf_tdata (output_bfd)->verref == NULL)
+ s->flags |= SEC_EXCLUDE;
+ else
+ {
+ Elf_Internal_Verneed *vn;
+ unsigned int size;
+ unsigned int crefs;
+ bfd_byte *p;
+
+ /* Build the version dependency section. */
+ size = 0;
+ crefs = 0;
+ for (vn = elf_tdata (output_bfd)->verref;
+ vn != NULL;
+ vn = vn->vn_nextref)
+ {
+ Elf_Internal_Vernaux *a;
+
+ size += sizeof (Elf_External_Verneed);
+ ++crefs;
+ for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ size += sizeof (Elf_External_Vernaux);
+ }
+
+ s->size = size;
+ s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+
+ p = s->contents;
+ for (vn = elf_tdata (output_bfd)->verref;
+ vn != NULL;
+ vn = vn->vn_nextref)
+ {
+ unsigned int caux;
+ Elf_Internal_Vernaux *a;
+ size_t indx;
+
+ caux = 0;
+ for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ ++caux;
+
+ vn->vn_version = VER_NEED_CURRENT;
+ vn->vn_cnt = caux;
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
+ elf_dt_name (vn->vn_bfd) != NULL
+ ? elf_dt_name (vn->vn_bfd)
+ : lbasename (vn->vn_bfd->filename),
+ FALSE);
+ if (indx == (size_t) -1)
+ return FALSE;
+ vn->vn_file = indx;
+ vn->vn_aux = sizeof (Elf_External_Verneed);
+ if (vn->vn_nextref == NULL)
+ vn->vn_next = 0;
+ else
+ vn->vn_next = (sizeof (Elf_External_Verneed)
+ + caux * sizeof (Elf_External_Vernaux));
+
+ _bfd_elf_swap_verneed_out (output_bfd, vn,
+ (Elf_External_Verneed *) p);
+ p += sizeof (Elf_External_Verneed);
+
+ for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ {
+ a->vna_hash = bfd_elf_hash (a->vna_nodename);
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
+ a->vna_nodename, FALSE);
+ if (indx == (size_t) -1)
+ return FALSE;
+ a->vna_name = indx;
+ if (a->vna_nextptr == NULL)
+ a->vna_next = 0;
+ else
+ a->vna_next = sizeof (Elf_External_Vernaux);
+
+ _bfd_elf_swap_vernaux_out (output_bfd, a,
+ (Elf_External_Vernaux *) p);
+ p += sizeof (Elf_External_Vernaux);
+ }
+ }
+
+ elf_tdata (output_bfd)->cverrefs = crefs;
+ }
+ }
+ }
+
+ bed = get_elf_backend_data (output_bfd);
+
+ if (info->gc_sections && bed->can_gc_sections)
+ {
+ struct elf_gc_sweep_symbol_info sweep_info;
+ unsigned long section_sym_count;
+
+ /* Remove the symbols that were in the swept sections from the
+ dynamic symbol table. GCFIXME: Anyone know how to get them
+ out of the static symbol table as well? */
+ sweep_info.info = info;
+ sweep_info.hide_symbol = bed->elf_backend_hide_symbol;
+ elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol,
+ &sweep_info);
+
+ _bfd_elf_link_renumber_dynsyms (output_bfd, info, §ion_sym_count);
+ }
+
+ /* Any syms created from now on start with -1 in
+ got.refcount/offset and plt.refcount/offset. */
+ elf_hash_table (info)->init_got_refcount
+ = elf_hash_table (info)->init_got_offset;
+ elf_hash_table (info)->init_plt_refcount
+ = elf_hash_table (info)->init_plt_offset;
+
+ if (bfd_link_relocatable (info)
+ && !_bfd_elf_size_group_sections (info))
+ return FALSE;
+
+ /* The backend may have to create some sections regardless of whether
+ we're dynamic or not. */
+ if (bed->elf_backend_always_size_sections
+ && ! (*bed->elf_backend_always_size_sections) (output_bfd, info))
+ return FALSE;
+
+ /* Determine any GNU_STACK segment requirements, after the backend
+ has had a chance to set a default segment size. */
+ if (info->execstack)
+ elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X;
+ else if (info->noexecstack)
+ elf_stack_flags (output_bfd) = PF_R | PF_W;
+ else
+ {
+ bfd *inputobj;
+ asection *notesec = NULL;
+ int exec = 0;
+
+ for (inputobj = info->input_bfds;
+ inputobj;
+ inputobj = inputobj->link.next)
+ {
+ asection *s;
+
+ if (inputobj->flags
+ & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED))
+ continue;
+ s = bfd_get_section_by_name (inputobj, ".note.GNU-stack");
+ if (s)
+ {
+ if (s->flags & SEC_CODE)
+ exec = PF_X;
+ notesec = s;
+ }
+ else if (bed->default_execstack)
+ exec = PF_X;
+ }
+ if (notesec || info->stacksize > 0)
+ elf_stack_flags (output_bfd) = PF_R | PF_W | exec;
+ if (notesec && exec && bfd_link_relocatable (info)
+ && notesec->output_section != bfd_abs_section_ptr)
+ notesec->output_section->flags |= SEC_CODE;
+ }
+
+ if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created)
+ {
+ struct elf_info_failed eif;
+ struct elf_link_hash_entry *h;
+ asection *dynstr;
+ asection *s;
+
+ *sinterpptr = bfd_get_linker_section (dynobj, ".interp");
+ BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp);
+
+ if (soname != NULL)
+ {
+ soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
+ soname, TRUE);
+ if (soname_indx == (size_t) -1
+ || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx))
+ return FALSE;
+ }
+
+ if (info->symbolic)
+ {
+ if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0))
+ return FALSE;
+ info->flags |= DF_SYMBOLIC;
+ }
+
+ if (rpath != NULL)
+ {
+ size_t indx;
+ bfd_vma tag;
+
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath,
+ TRUE);
+ if (indx == (size_t) -1)
+ return FALSE;
+
+ tag = info->new_dtags ? DT_RUNPATH : DT_RPATH;
+ if (!_bfd_elf_add_dynamic_entry (info, tag, indx))
+ return FALSE;
+ }
+
+ if (filter_shlib != NULL)
+ {
+ size_t indx;
+
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
+ filter_shlib, TRUE);
+ if (indx == (size_t) -1
+ || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx))
+ return FALSE;
+ }
+
+ if (auxiliary_filters != NULL)
+ {
+ const char * const *p;
+
+ for (p = auxiliary_filters; *p != NULL; p++)
+ {
+ size_t indx;
+
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
+ *p, TRUE);
+ if (indx == (size_t) -1
+ || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx))
+ return FALSE;
+ }
+ }
+
+ if (audit != NULL)
+ {
+ size_t indx;
+
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit,
+ TRUE);
+ if (indx == (size_t) -1
+ || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx))
+ return FALSE;
+ }
+
+ if (depaudit != NULL)
+ {
+ size_t indx;
+
+ indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit,
+ TRUE);
+ if (indx == (size_t) -1
+ || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx))
+ return FALSE;
+ }
+
+ eif.info = info;
+ eif.failed = FALSE;
+
+ /* Find all symbols which were defined in a dynamic object and make
+ the backend pick a reasonable value for them. */
+ elf_link_hash_traverse (elf_hash_table (info),
+ _bfd_elf_adjust_dynamic_symbol,
+ &eif);
+ if (eif.failed)
+ return FALSE;
+
+ /* Add some entries to the .dynamic section. We fill in some of the
+ values later, in bfd_elf_final_link, but we must add the entries
+ now so that we know the final size of the .dynamic section. */
+
+ /* If there are initialization and/or finalization functions to
+ call then add the corresponding DT_INIT/DT_FINI entries. */
+ h = (info->init_function
+ ? elf_link_hash_lookup (elf_hash_table (info),
+ info->init_function, FALSE,
+ FALSE, FALSE)
+ : NULL);
+ if (h != NULL
+ && (h->ref_regular
+ || h->def_regular))
+ {
+ if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0))
+ return FALSE;
+ }
+ h = (info->fini_function
+ ? elf_link_hash_lookup (elf_hash_table (info),
+ info->fini_function, FALSE,
+ FALSE, FALSE)
+ : NULL);
+ if (h != NULL
+ && (h->ref_regular
+ || h->def_regular))
+ {
+ if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0))
+ return FALSE;
+ }
+
+ s = bfd_get_section_by_name (output_bfd, ".preinit_array");
+ if (s != NULL && s->linker_has_input)
+ {
+ /* DT_PREINIT_ARRAY is not allowed in shared library. */
+ if (! bfd_link_executable (info))
+ {
+ bfd *sub;
+ asection *o;
+
+ for (sub = info->input_bfds; sub != NULL;
+ sub = sub->link.next)
+ if (bfd_get_flavour (sub) == bfd_target_elf_flavour)
+ for (o = sub->sections; o != NULL; o = o->next)
+ if (elf_section_data (o)->this_hdr.sh_type
+ == SHT_PREINIT_ARRAY)
+ {
+ _bfd_error_handler
+ (_("%B: .preinit_array section is not allowed in DSO"),
+ sub);
+ break;
+ }
+
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return FALSE;
+ }
- if (t->next != NULL && t->next->vernum != 0)
- def.vd_next = (sizeof (Elf_External_Verdef)
- + (cdeps + 1) * sizeof (Elf_External_Verdaux));
+ if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0)
+ || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0))
+ return FALSE;
+ }
+ s = bfd_get_section_by_name (output_bfd, ".init_array");
+ if (s != NULL && s->linker_has_input)
+ {
+ if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0)
+ || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0))
+ return FALSE;
+ }
+ s = bfd_get_section_by_name (output_bfd, ".fini_array");
+ if (s != NULL && s->linker_has_input)
+ {
+ if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0)
+ || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0))
+ return FALSE;
+ }
- _bfd_elf_swap_verdef_out (output_bfd, &def,
- (Elf_External_Verdef *) p);
- p += sizeof (Elf_External_Verdef);
+ dynstr = bfd_get_linker_section (dynobj, ".dynstr");
+ /* If .dynstr is excluded from the link, we don't want any of
+ these tags. Strictly, we should be checking each section
+ individually; This quick check covers for the case where
+ someone does a /DISCARD/ : { *(*) }. */
+ if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr)
+ {
+ bfd_size_type strsize;
- defaux.vda_name = h->dynstr_index;
- _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
- h->dynstr_index);
- defaux.vda_next = 0;
- if (t->deps != NULL)
- defaux.vda_next = sizeof (Elf_External_Verdaux);
- t->name_indx = defaux.vda_name;
+ strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
+ if ((info->emit_hash
+ && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0))
+ || (info->emit_gnu_hash
+ && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0))
+ || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0)
+ || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0)
+ || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize)
+ || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT,
+ bed->s->sizeof_sym))
+ return FALSE;
+ }
+ }
- _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
- (Elf_External_Verdaux *) p);
- p += sizeof (Elf_External_Verdaux);
+ if (! _bfd_elf_maybe_strip_eh_frame_hdr (info))
+ return FALSE;
- for (n = t->deps; n != NULL; n = n->next)
- {
- if (n->version_needed == NULL)
- {
- /* This can happen if there was an error in the
- version script. */
- defaux.vda_name = 0;
- }
- else
- {
- defaux.vda_name = n->version_needed->name_indx;
- _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
- defaux.vda_name);
- }
- if (n->next == NULL)
- defaux.vda_next = 0;
- else
- defaux.vda_next = sizeof (Elf_External_Verdaux);
+ /* The backend must work out the sizes of all the other dynamic
+ sections. */
+ if (dynobj != NULL
+ && bed->elf_backend_size_dynamic_sections != NULL
+ && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
+ return FALSE;
- _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
- (Elf_External_Verdaux *) p);
- p += sizeof (Elf_External_Verdaux);
- }
- }
+ if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created)
+ {
+ unsigned long section_sym_count;
+
+ if (elf_tdata (output_bfd)->cverdefs)
+ {
+ unsigned int crefs = elf_tdata (output_bfd)->cverdefs;
if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs))
+ || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, crefs))
return FALSE;
-
- elf_tdata (output_bfd)->cverdefs = cdefs;
}
if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS))
return FALSE;
}
- /* Work out the size of the version reference section. */
-
- s = bfd_get_linker_section (dynobj, ".gnu.version_r");
- BFD_ASSERT (s != NULL);
- {
- struct elf_find_verdep_info sinfo;
-
- sinfo.info = info;
- sinfo.vers = elf_tdata (output_bfd)->cverdefs;
- if (sinfo.vers == 0)
- sinfo.vers = 1;
- sinfo.failed = FALSE;
-
- elf_link_hash_traverse (elf_hash_table (info),
- _bfd_elf_link_find_version_dependencies,
- &sinfo);
- if (sinfo.failed)
- return FALSE;
-
- if (elf_tdata (output_bfd)->verref == NULL)
- s->flags |= SEC_EXCLUDE;
- else
- {
- Elf_Internal_Verneed *t;
- unsigned int size;
- unsigned int crefs;
- bfd_byte *p;
-
- /* Build the version dependency section. */
- size = 0;
- crefs = 0;
- for (t = elf_tdata (output_bfd)->verref;
- t != NULL;
- t = t->vn_nextref)
- {
- Elf_Internal_Vernaux *a;
-
- size += sizeof (Elf_External_Verneed);
- ++crefs;
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- size += sizeof (Elf_External_Vernaux);
- }
-
- s->size = size;
- s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size);
- if (s->contents == NULL)
- return FALSE;
-
- p = s->contents;
- for (t = elf_tdata (output_bfd)->verref;
- t != NULL;
- t = t->vn_nextref)
- {
- unsigned int caux;
- Elf_Internal_Vernaux *a;
- size_t indx;
-
- caux = 0;
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- ++caux;
-
- t->vn_version = VER_NEED_CURRENT;
- t->vn_cnt = caux;
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- elf_dt_name (t->vn_bfd) != NULL
- ? elf_dt_name (t->vn_bfd)
- : lbasename (t->vn_bfd->filename),
- FALSE);
- if (indx == (size_t) -1)
- return FALSE;
- t->vn_file = indx;
- t->vn_aux = sizeof (Elf_External_Verneed);
- if (t->vn_nextref == NULL)
- t->vn_next = 0;
- else
- t->vn_next = (sizeof (Elf_External_Verneed)
- + caux * sizeof (Elf_External_Vernaux));
-
- _bfd_elf_swap_verneed_out (output_bfd, t,
- (Elf_External_Verneed *) p);
- p += sizeof (Elf_External_Verneed);
-
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- {
- a->vna_hash = bfd_elf_hash (a->vna_nodename);
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- a->vna_nodename, FALSE);
- if (indx == (size_t) -1)
- return FALSE;
- a->vna_name = indx;
- if (a->vna_nextptr == NULL)
- a->vna_next = 0;
- else
- a->vna_next = sizeof (Elf_External_Vernaux);
-
- _bfd_elf_swap_vernaux_out (output_bfd, a,
- (Elf_External_Vernaux *) p);
- p += sizeof (Elf_External_Vernaux);
- }
- }
-
- if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0)
- || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs))
- return FALSE;
+ if (elf_tdata (output_bfd)->cverrefs)
+ {
+ unsigned int crefs = elf_tdata (output_bfd)->cverrefs;
- elf_tdata (output_bfd)->cverrefs = crefs;
- }
- }
+ if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0)
+ || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs))
+ return FALSE;
+ }
if ((elf_tdata (output_bfd)->cverrefs == 0
&& elf_tdata (output_bfd)->cverdefs == 0)
|| _bfd_elf_link_renumber_dynsyms (output_bfd, info,
§ion_sym_count) == 0)
{
+ asection *s;
+
s = bfd_get_linker_section (dynobj, ".gnu.version");
s->flags |= SEC_EXCLUDE;
}
struct elf_link_hash_table *htab;
/* Copy down any references that we may have already seen to the
- symbol which just became indirect if DIR isn't a hidden versioned
- symbol. */
+ symbol which just became indirect. */
if (dir->versioned != versioned_hidden)
- {
- dir->ref_dynamic |= ind->ref_dynamic;
- dir->ref_regular |= ind->ref_regular;
- dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
- dir->non_got_ref |= ind->non_got_ref;
- dir->needs_plt |= ind->needs_plt;
- dir->pointer_equality_needed |= ind->pointer_equality_needed;
- }
+ dir->ref_dynamic |= ind->ref_dynamic;
+ dir->ref_regular |= ind->ref_regular;
+ dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
+ dir->non_got_ref |= ind->non_got_ref;
+ dir->needs_plt |= ind->needs_plt;
+ dir->pointer_equality_needed |= ind->pointer_equality_needed;
if (ind->root.type != bfd_link_hash_indirect)
return;
long indx;
int ret;
unsigned int type;
- /* A symbol is bound locally if it is forced local or it is locally
- defined, hidden versioned, not referenced by shared library and
- not exported when linking executable. */
- bfd_boolean local_bind = (h->forced_local
- || (bfd_link_executable (flinfo->info)
- && !flinfo->info->export_dynamic
- && !h->dynamic
- && !h->ref_dynamic
- && h->def_regular
- && h->versioned == versioned_hidden));
if (h->root.type == bfd_link_hash_warning)
{
/* Decide whether to output this symbol in this pass. */
if (eoinfo->localsyms)
{
- if (!local_bind)
+ if (!h->forced_local)
return TRUE;
}
else
{
- if (local_bind)
+ if (h->forced_local)
return TRUE;
}
abort ();
}
- if (local_bind)
+ if (h->forced_local)
{
sym.st_info = ELF_ST_INFO (STB_LOCAL, type);
/* Turn off visibility on local symbol. */
/* Since there is no version information in the dynamic string,
if there is no version info in symbol version section, we will
have a run-time problem if not linking executable, referenced
- by shared library, not locally defined, or not bound locally.
- */
+ by shared library, or not bound locally. */
if (h->verinfo.verdef == NULL
- && !local_bind
&& (!bfd_link_executable (flinfo->info)
|| h->ref_dynamic
|| !h->def_regular))
asection *attr_section = NULL;
bfd_vma attr_size = 0;
const char *std_attrs_section;
+ struct elf_link_hash_table *htab = elf_hash_table (info);
- if (! is_elf_hash_table (info->hash))
+ if (!is_elf_hash_table (htab))
return FALSE;
if (bfd_link_pic (info))
abfd->flags |= DYNAMIC;
- dynamic = elf_hash_table (info)->dynamic_sections_created;
- dynobj = elf_hash_table (info)->dynobj;
+ dynamic = htab->dynamic_sections_created;
+ dynobj = htab->dynobj;
emit_relocs = (bfd_link_relocatable (info)
|| info->emitrelocations);
asection *sec;
sec = p->u.indirect.section;
- esdi = elf_section_data (sec);
/* Mark all sections which are to be included in the
link. This will normally be every section. We need
if (sec->flags & SEC_MERGE)
merged = TRUE;
- if (esdo->this_hdr.sh_type == SHT_REL
- || esdo->this_hdr.sh_type == SHT_RELA)
- /* Some backends use reloc_count in relocation sections
- to count particular types of relocs. Of course,
- reloc sections themselves can't have relocations. */
- reloc_count = 0;
- else if (emit_relocs)
- {
- reloc_count = sec->reloc_count;
- if (bed->elf_backend_count_additional_relocs)
- {
- int c;
- c = (*bed->elf_backend_count_additional_relocs) (sec);
- additional_reloc_count += c;
- }
- }
- else if (bed->elf_backend_count_relocs)
- reloc_count = (*bed->elf_backend_count_relocs) (info, sec);
-
if (sec->rawsize > max_contents_size)
max_contents_size = sec->rawsize;
if (sec->size > max_contents_size)
max_contents_size = sec->size;
- /* We are interested in just local symbols, not all
- symbols. */
if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
&& (sec->owner->flags & DYNAMIC) == 0)
{
size_t sym_count;
+ /* We are interested in just local symbols, not all
+ symbols. */
if (elf_bad_symtab (sec->owner))
sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
/ bed->s->sizeof_sym);
&& elf_symtab_shndx_list (sec->owner) != NULL)
max_sym_shndx_count = sym_count;
+ if (esdo->this_hdr.sh_type == SHT_REL
+ || esdo->this_hdr.sh_type == SHT_RELA)
+ /* Some backends use reloc_count in relocation sections
+ to count particular types of relocs. Of course,
+ reloc sections themselves can't have relocations. */
+ ;
+ else if (emit_relocs)
+ {
+ reloc_count = sec->reloc_count;
+ if (bed->elf_backend_count_additional_relocs)
+ {
+ int c;
+ c = (*bed->elf_backend_count_additional_relocs) (sec);
+ additional_reloc_count += c;
+ }
+ }
+ else if (bed->elf_backend_count_relocs)
+ reloc_count = (*bed->elf_backend_count_relocs) (info, sec);
+
+ esdi = elf_section_data (sec);
+
if ((sec->flags & SEC_RELOC) != 0)
{
size_t ext_size = 0;
}
if (! bfd_link_relocatable (info) && merged)
- elf_link_hash_traverse (elf_hash_table (info),
- _bfd_elf_link_sec_merge_syms, abfd);
+ elf_link_hash_traverse (htab, _bfd_elf_link_sec_merge_syms, abfd);
/* Figure out the file positions for everything but the symbol table
and the relocs. We set symcount to force assign_section_numbers
if (max_sym_count < 20)
max_sym_count = 20;
- elf_hash_table (info)->strtabsize = max_sym_count;
+ htab->strtabsize = max_sym_count;
amt = max_sym_count * sizeof (struct elf_sym_strtab);
- elf_hash_table (info)->strtab
- = (struct elf_sym_strtab *) bfd_malloc (amt);
- if (elf_hash_table (info)->strtab == NULL)
+ htab->strtab = (struct elf_sym_strtab *) bfd_malloc (amt);
+ if (htab->strtab == NULL)
goto error_return;
/* The real buffer will be allocated in elf_link_swap_symbols_out. */
flinfo.symshndxbuf
goto error_return;
}
- if (elf_hash_table (info)->tls_sec)
+ if (htab->tls_sec)
{
bfd_vma base, end = 0;
asection *sec;
- for (sec = elf_hash_table (info)->tls_sec;
+ for (sec = htab->tls_sec;
sec && (sec->flags & SEC_THREAD_LOCAL);
sec = sec->next)
{
}
end = sec->vma + size;
}
- base = elf_hash_table (info)->tls_sec->vma;
+ base = htab->tls_sec->vma;
/* Only align end of TLS section if static TLS doesn't have special
alignment requirements. */
if (bed->static_tls_alignment == 1)
- end = align_power (end,
- elf_hash_table (info)->tls_sec->alignment_power);
- elf_hash_table (info)->tls_size = end - base;
+ end = align_power (end, htab->tls_sec->alignment_power);
+ htab->tls_size = end - base;
}
/* Reorder SHF_LINK_ORDER sections. */
symtab_hdr->sh_info = bfd_get_symcount (abfd);
if (dynamic
- && elf_hash_table (info)->dynsym != NULL
- && (elf_hash_table (info)->dynsym->output_section
- != bfd_abs_section_ptr))
+ && htab->dynsym != NULL
+ && htab->dynsym->output_section != bfd_abs_section_ptr)
{
Elf_Internal_Sym sym;
- bfd_byte *dynsym = elf_hash_table (info)->dynsym->contents;
+ bfd_byte *dynsym = htab->dynsym->contents;
- o = elf_hash_table (info)->dynsym->output_section;
- elf_section_data (o)->this_hdr.sh_info
- = elf_hash_table (info)->local_dynsymcount + 1;
+ o = htab->dynsym->output_section;
+ elf_section_data (o)->this_hdr.sh_info = htab->local_dynsymcount + 1;
/* Write out the section symbols for the output sections. */
if (bfd_link_pic (info)
- || elf_hash_table (info)->is_relocatable_executable)
+ || htab->is_relocatable_executable)
{
asection *s;
}
/* Write out the local dynsyms. */
- if (elf_hash_table (info)->dynlocal)
+ if (htab->dynlocal)
{
struct elf_link_local_dynamic_entry *e;
- for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
+ for (e = htab->dynlocal; e ; e = e->next)
{
asection *s;
bfd_byte *dest;
Elf_Internal_Dyn dyn;
const char *name;
unsigned int type;
+ bfd_size_type sh_size;
+ bfd_vma sh_addr;
bed->s->swap_dyn_in (dynobj, dyncon, &dyn);
{
struct elf_link_hash_entry *h;
- h = elf_link_hash_lookup (elf_hash_table (info), name,
- FALSE, FALSE, TRUE);
+ h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE);
if (h != NULL
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak))
type = SHT_REL;
else
type = SHT_RELA;
- dyn.d_un.d_val = 0;
- dyn.d_un.d_ptr = 0;
+ sh_size = 0;
+ sh_addr = 0;
for (i = 1; i < elf_numsections (abfd); i++)
{
Elf_Internal_Shdr *hdr;
if (hdr->sh_type == type
&& (hdr->sh_flags & SHF_ALLOC) != 0)
{
- if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
- dyn.d_un.d_val += hdr->sh_size;
- else
- {
- if (dyn.d_un.d_ptr == 0
- || hdr->sh_addr < dyn.d_un.d_ptr)
- dyn.d_un.d_ptr = hdr->sh_addr;
- }
+ sh_size += hdr->sh_size;
+ if (sh_addr == 0
+ || sh_addr > hdr->sh_addr)
+ sh_addr = hdr->sh_addr;
}
}
+
+ if (bed->dtrel_excludes_plt && htab->srelplt != NULL)
+ {
+ /* Don't count procedure linkage table relocs in the
+ overall reloc count. */
+ sh_size -= htab->srelplt->size;
+ if (sh_size == 0)
+ /* If the size is zero, make the address zero too.
+ This is to avoid a glibc bug. If the backend
+ emits DT_RELA/DT_RELASZ even when DT_RELASZ is
+ zero, then we'll put DT_RELA at the end of
+ DT_JMPREL. glibc will interpret the end of
+ DT_RELA matching the end of DT_JMPREL as the
+ case where DT_RELA includes DT_JMPREL, and for
+ LD_BIND_NOW will decide that processing DT_RELA
+ will process the PLT relocs too. Net result:
+ No PLT relocs applied. */
+ sh_addr = 0;
+
+ /* If .rela.plt is the first .rela section, exclude
+ it from DT_RELA. */
+ else if (sh_addr == (htab->srelplt->output_section->vma
+ + htab->srelplt->output_offset))
+ sh_addr += htab->srelplt->size;
+ }
+
+ if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
+ dyn.d_un.d_val = sh_size;
+ else
+ dyn.d_un.d_ptr = sh_addr;
break;
}
bed->s->swap_dyn_out (dynobj, &dyn, dyncon);
created by _bfd_elf_link_create_dynamic_sections. */
continue;
}
- if (elf_hash_table (info)->stab_info.stabstr == o)
+ if (htab->stab_info.stabstr == o)
continue;
- if (elf_hash_table (info)->eh_info.hdr_sec == o)
+ if (htab->eh_info.hdr_sec == o)
continue;
if (strcmp (o->name, ".dynstr") != 0)
{
off = elf_section_data (o->output_section)->this_hdr.sh_offset;
if (bfd_seek (abfd, off, SEEK_SET) != 0
- || ! _bfd_elf_strtab_emit (abfd,
- elf_hash_table (info)->dynstr))
+ || !_bfd_elf_strtab_emit (abfd, htab->dynstr))
goto error_return;
}
}
}
/* If we have optimized stabs strings, output them. */
- if (elf_hash_table (info)->stab_info.stabstr != NULL)
+ if (htab->stab_info.stabstr != NULL)
{
- if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info))
+ if (!_bfd_write_stab_strings (abfd, &htab->stab_info))
goto error_return;
}
return TRUE;
}
-/* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
-
-struct elf_gc_sweep_symbol_info
-{
- struct bfd_link_info *info;
- void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *,
- bfd_boolean);
-};
-
-static bfd_boolean
-elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data)
-{
- if (!h->mark
- && (((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && !((h->def_regular || ELF_COMMON_DEF_P (h))
- && h->root.u.def.section->gc_mark))
- || h->root.type == bfd_link_hash_undefined
- || h->root.type == bfd_link_hash_undefweak))
- {
- struct elf_gc_sweep_symbol_info *inf;
-
- inf = (struct elf_gc_sweep_symbol_info *) data;
- (*inf->hide_symbol) (inf->info, h, TRUE);
- h->def_regular = 0;
- h->ref_regular = 0;
- h->ref_regular_nonweak = 0;
- }
-
- return TRUE;
-}
-
/* The sweep phase of garbage collection. Remove all garbage sections. */
typedef bfd_boolean (*gc_sweep_hook_fn)
bfd *sub;
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook;
- unsigned long section_sym_count;
- struct elf_gc_sweep_symbol_info sweep_info;
for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
{
if (info->print_gc_sections && o->size != 0)
/* xgettext:c-format */
- _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name);
+ _bfd_error_handler (_("Removing unused section '%s' in file '%B'"),
+ sub, o->name);
/* But we also have to update some of the relocation
info we collected before. */
}
}
- /* Remove the symbols that were in the swept sections from the dynamic
- symbol table. GCFIXME: Anyone know how to get them out of the
- static symbol table as well? */
- sweep_info.info = info;
- sweep_info.hide_symbol = bed->elf_backend_hide_symbol;
- elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol,
- &sweep_info);
-
- _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count);
return TRUE;
}
&& ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
&& (!bfd_link_executable (info)
+ || info->gc_keep_exported
|| info->export_dynamic
|| (h->dynamic
&& d != NULL
return FALSE;
/* Mark dynamically referenced symbols. */
- if (htab->dynamic_sections_created)
+ if (htab->dynamic_sections_created || info->gc_keep_exported)
elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info);
/* Grovel through relocs to find out who stays ... */