return FALSE;
}
\f
+/* Initialize COOKIE for input bfd ABFD. */
+
+static bfd_boolean
+init_reloc_cookie (struct elf_reloc_cookie *cookie,
+ struct bfd_link_info *info, bfd *abfd)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ const struct elf_backend_data *bed;
+
+ bed = get_elf_backend_data (abfd);
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ cookie->abfd = abfd;
+ cookie->sym_hashes = elf_sym_hashes (abfd);
+ cookie->bad_symtab = elf_bad_symtab (abfd);
+ if (cookie->bad_symtab)
+ {
+ cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym;
+ cookie->extsymoff = 0;
+ }
+ else
+ {
+ cookie->locsymcount = symtab_hdr->sh_info;
+ cookie->extsymoff = symtab_hdr->sh_info;
+ }
+
+ if (bed->s->arch_size == 32)
+ cookie->r_sym_shift = 8;
+ else
+ cookie->r_sym_shift = 32;
+
+ cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (cookie->locsyms == NULL && cookie->locsymcount != 0)
+ {
+ cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ cookie->locsymcount, 0,
+ NULL, NULL, NULL);
+ if (cookie->locsyms == NULL)
+ {
+ info->callbacks->einfo (_("%P%X: can not read symbols: %E\n"));
+ return FALSE;
+ }
+ if (info->keep_memory)
+ symtab_hdr->contents = (bfd_byte *) cookie->locsyms;
+ }
+ return TRUE;
+}
+
+/* Free the memory allocated by init_reloc_cookie, if appropriate. */
+
+static void
+fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ if (cookie->locsyms != NULL
+ && symtab_hdr->contents != (unsigned char *) cookie->locsyms)
+ free (cookie->locsyms);
+}
+
+/* Initialize the relocation information in COOKIE for input section SEC
+ of input bfd ABFD. */
+
+static bfd_boolean
+init_reloc_cookie_rels (struct elf_reloc_cookie *cookie,
+ struct bfd_link_info *info, bfd *abfd,
+ asection *sec)
+{
+ const struct elf_backend_data *bed;
+
+ if (sec->reloc_count == 0)
+ {
+ cookie->rels = NULL;
+ cookie->relend = NULL;
+ }
+ else
+ {
+ bed = get_elf_backend_data (abfd);
+
+ cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
+ info->keep_memory);
+ if (cookie->rels == NULL)
+ return FALSE;
+ cookie->rel = cookie->rels;
+ cookie->relend = (cookie->rels
+ + sec->reloc_count * bed->s->int_rels_per_ext_rel);
+ }
+ cookie->rel = cookie->rels;
+ return TRUE;
+}
+
+/* Free the memory allocated by init_reloc_cookie_rels,
+ if appropriate. */
+
+static void
+fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie,
+ asection *sec)
+{
+ if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels)
+ free (cookie->rels);
+}
+
+/* Initialize the whole of COOKIE for input section SEC. */
+
+static bfd_boolean
+init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie,
+ struct bfd_link_info *info,
+ asection *sec)
+{
+ if (!init_reloc_cookie (cookie, info, sec->owner))
+ goto error1;
+ if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec))
+ goto error2;
+ return TRUE;
+
+ error2:
+ fini_reloc_cookie (cookie, sec->owner);
+ error1:
+ return FALSE;
+}
+
+/* Free the memory allocated by init_reloc_cookie_for_section,
+ if appropriate. */
+
+static void
+fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie,
+ asection *sec)
+{
+ fini_reloc_cookie_rels (cookie, sec);
+ fini_reloc_cookie (cookie, sec->owner);
+}
+\f
/* Garbage collect unused sections. */
/* Default gc_mark_hook. */
return NULL;
}
+/* COOKIE->rel describes a relocation against section SEC, which is
+ a section we've decided to keep. Return the section that contains
+ the relocation symbol, or NULL if no section contains it. */
+
+asection *
+_bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec,
+ elf_gc_mark_hook_fn gc_mark_hook,
+ struct elf_reloc_cookie *cookie)
+{
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+
+ r_symndx = cookie->rel->r_info >> cookie->r_sym_shift;
+ if (r_symndx == 0)
+ return NULL;
+
+ if (r_symndx >= cookie->locsymcount
+ || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL)
+ {
+ h = cookie->sym_hashes[r_symndx - cookie->extsymoff];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL);
+ }
+
+ return (*gc_mark_hook) (sec, info, cookie->rel, NULL,
+ &cookie->locsyms[r_symndx]);
+}
+
+/* COOKIE->rel describes a relocation against section SEC, which is
+ a section we've decided to keep. Mark the section that contains
+ the relocation symbol. IS_EH is true if the mark comes from
+ .eh_frame. */
+
+bfd_boolean
+_bfd_elf_gc_mark_reloc (struct bfd_link_info *info,
+ asection *sec,
+ elf_gc_mark_hook_fn gc_mark_hook,
+ struct elf_reloc_cookie *cookie,
+ bfd_boolean is_eh)
+{
+ asection *rsec;
+
+ rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie);
+ if (rsec && !rsec->gc_mark)
+ {
+ if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour)
+ rsec->gc_mark = 1;
+ else if (is_eh)
+ rsec->gc_mark_from_eh = 1;
+ else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook))
+ return FALSE;
+ }
+ return TRUE;
+}
+
/* The mark phase of garbage collection. For a given section, mark
it and any sections in this section's group, and all the sections
which define symbols to which it refers. */
is_eh = strcmp (sec->name, ".eh_frame") == 0;
if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0)
{
- Elf_Internal_Rela *relstart, *rel, *relend;
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- size_t nlocsyms;
- size_t extsymoff;
- bfd *input_bfd = sec->owner;
- const struct elf_backend_data *bed = get_elf_backend_data (input_bfd);
- Elf_Internal_Sym *isym = NULL;
- int r_sym_shift;
-
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (input_bfd);
-
- /* Read the local symbols. */
- if (elf_bad_symtab (input_bfd))
- {
- nlocsyms = symtab_hdr->sh_size / bed->s->sizeof_sym;
- extsymoff = 0;
- }
- else
- extsymoff = nlocsyms = symtab_hdr->sh_info;
-
- isym = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isym == NULL && nlocsyms != 0)
- {
- isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0,
- NULL, NULL, NULL);
- if (isym == NULL)
- return FALSE;
- }
+ struct elf_reloc_cookie cookie;
- /* Read the relocations. */
- relstart = _bfd_elf_link_read_relocs (input_bfd, sec, NULL, NULL,
- info->keep_memory);
- if (relstart == NULL)
- {
- ret = FALSE;
- goto out1;
- }
- relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel;
-
- if (bed->s->arch_size == 32)
- r_sym_shift = 8;
+ if (!init_reloc_cookie_for_section (&cookie, info, sec))
+ ret = FALSE;
else
- r_sym_shift = 32;
-
- for (rel = relstart; rel < relend; rel++)
- {
- unsigned long r_symndx;
- asection *rsec;
- struct elf_link_hash_entry *h;
-
- r_symndx = rel->r_info >> r_sym_shift;
- if (r_symndx == 0)
- continue;
-
- if (r_symndx >= nlocsyms
- || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL)
- {
- h = sym_hashes[r_symndx - extsymoff];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- rsec = (*gc_mark_hook) (sec, info, rel, h, NULL);
- }
- else
- {
- rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]);
- }
-
- if (rsec && !rsec->gc_mark)
- {
- if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour)
- rsec->gc_mark = 1;
- else if (is_eh)
- rsec->gc_mark_from_eh = 1;
- else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook))
- {
- ret = FALSE;
- goto out2;
- }
- }
- }
-
- out2:
- if (elf_section_data (sec)->relocs != relstart)
- free (relstart);
- out1:
- if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym)
{
- if (! info->keep_memory)
- free (isym);
- else
- symtab_hdr->contents = (unsigned char *) isym;
+ for (; cookie.rel < cookie.relend; cookie.rel++)
+ if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook,
+ &cookie, is_eh))
+ {
+ ret = FALSE;
+ break;
+ }
+ fini_reloc_cookie_for_section (&cookie, sec);
}
}
-
return ret;
}
{
struct elf_reloc_cookie cookie;
asection *stab, *eh;
- Elf_Internal_Shdr *symtab_hdr;
const struct elf_backend_data *bed;
bfd *abfd;
- unsigned int count;
bfd_boolean ret = FALSE;
if (info->traditional_format
&& bed->elf_backend_discard_info == NULL)
continue;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- cookie.abfd = abfd;
- cookie.sym_hashes = elf_sym_hashes (abfd);
- cookie.bad_symtab = elf_bad_symtab (abfd);
- if (cookie.bad_symtab)
- {
- cookie.locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym;
- cookie.extsymoff = 0;
- }
- else
- {
- cookie.locsymcount = symtab_hdr->sh_info;
- cookie.extsymoff = symtab_hdr->sh_info;
- }
-
- if (bed->s->arch_size == 32)
- cookie.r_sym_shift = 8;
- else
- cookie.r_sym_shift = 32;
-
- cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (cookie.locsyms == NULL && cookie.locsymcount != 0)
- {
- cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- cookie.locsymcount, 0,
- NULL, NULL, NULL);
- if (cookie.locsyms == NULL)
- {
- info->callbacks->einfo (_("%P%X: can not read symbols: %E\n"));
- return FALSE;
- }
- }
+ if (!init_reloc_cookie (&cookie, info, abfd))
+ return FALSE;
- if (stab != NULL)
+ if (stab != NULL
+ && stab->reloc_count > 0
+ && init_reloc_cookie_rels (&cookie, info, abfd, stab))
{
- cookie.rels = NULL;
- count = stab->reloc_count;
- if (count != 0)
- cookie.rels = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL,
- info->keep_memory);
- if (cookie.rels != NULL)
- {
- cookie.rel = cookie.rels;
- cookie.relend = cookie.rels;
- cookie.relend += count * bed->s->int_rels_per_ext_rel;
- if (_bfd_discard_section_stabs (abfd, stab,
- elf_section_data (stab)->sec_info,
- bfd_elf_reloc_symbol_deleted_p,
- &cookie))
- ret = TRUE;
- if (elf_section_data (stab)->relocs != cookie.rels)
- free (cookie.rels);
- }
+ if (_bfd_discard_section_stabs (abfd, stab,
+ elf_section_data (stab)->sec_info,
+ bfd_elf_reloc_symbol_deleted_p,
+ &cookie))
+ ret = TRUE;
+ fini_reloc_cookie_rels (&cookie, stab);
}
- if (eh != NULL)
+ if (eh != NULL
+ && init_reloc_cookie_rels (&cookie, info, abfd, eh))
{
- cookie.rels = NULL;
- count = eh->reloc_count;
- if (count != 0)
- cookie.rels = _bfd_elf_link_read_relocs (abfd, eh, NULL, NULL,
- info->keep_memory);
- cookie.rel = cookie.rels;
- cookie.relend = cookie.rels;
- if (cookie.rels != NULL)
- cookie.relend += count * bed->s->int_rels_per_ext_rel;
-
if (_bfd_elf_discard_section_eh_frame (abfd, info, eh,
bfd_elf_reloc_symbol_deleted_p,
&cookie))
ret = TRUE;
-
- if (cookie.rels != NULL
- && elf_section_data (eh)->relocs != cookie.rels)
- free (cookie.rels);
+ fini_reloc_cookie_rels (&cookie, eh);
}
if (bed->elf_backend_discard_info != NULL
&& (*bed->elf_backend_discard_info) (abfd, &cookie, info))
ret = TRUE;
- if (cookie.locsyms != NULL
- && symtab_hdr->contents != (unsigned char *) cookie.locsyms)
- {
- if (! info->keep_memory)
- free (cookie.locsyms);
- else
- symtab_hdr->contents = (unsigned char *) cookie.locsyms;
- }
+ fini_reloc_cookie (&cookie, abfd);
}
if (info->eh_frame_hdr
projects / external / binutils.git / commitdiff