Don't attach linker created section to --just-syms bfd
All sections on a --just-syms bfd are discarded from the output, so
attaching linker created sections to such a bfd results in errors.
In other cases, like the .note.GNU-stack check, it's wrong to have a
--just-syms object potentially affect the output.
bfd/
* elflink.c (_bfd_elf_link_create_dynstrtab): Don't make dynobj
a --just-syms bfd.
(_bfd_elf_size_group_sections): Skip --just-syms bfds.
(bfd_elf_size_dynamic_sections): Ignore .note.GNU-stack and
.preinit_array on --just-syms bfds.
(_bfd_elf_gc_mark_extra_sections): Skip --just-syms bfds.
(elf_gc_sweep, bfd_elf_parse_eh_frame_entries): Likewise.
(bfd_elf_gc_sections, bfd_elf_discard_info): Likewise.
ld/
* emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Skip
--just-syms bfds when looking for a place to attach .note.gnu.build-id
and .eh_frame_hdr sections. Delete dead code.
This commit is contained in:
Alan Modra
parent
cc75e0fdae
commit
57963c05b9
@ -1,3 +1,14 @@
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2017-06-26 Alan Modra <amodra@gmail.com>
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* elflink.c (_bfd_elf_link_create_dynstrtab): Don't make dynobj
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a --just-syms bfd.
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(_bfd_elf_size_group_sections): Skip --just-syms bfds.
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(bfd_elf_size_dynamic_sections): Ignore .note.GNU-stack and
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.preinit_array on --just-syms bfds.
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(_bfd_elf_gc_mark_extra_sections): Skip --just-syms bfds.
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(elf_gc_sweep, bfd_elf_parse_eh_frame_entries): Likewise.
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(bfd_elf_gc_sections, bfd_elf_discard_info): Likewise.
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2017-06-25 Sergei Trofimovich <slyfox@gentoo.org>
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* elf.c (find_link): Bounds check "hint".
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@ -218,9 +218,13 @@ _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info)
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if ((abfd->flags & (DYNAMIC | BFD_PLUGIN)) != 0)
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{
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bfd *ibfd;
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asection *s;
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for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
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if ((ibfd->flags
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& (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
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& (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0
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&& bfd_get_flavour (ibfd) == bfd_target_elf_flavour
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&& !((s = ibfd->sections) != NULL
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&& s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS))
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{
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abfd = ibfd;
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break;
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@ -5861,9 +5865,12 @@ bfd_boolean
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_bfd_elf_size_group_sections (struct bfd_link_info *info)
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{
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bfd *ibfd;
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asection *s;
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for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
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if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour
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&& (s = ibfd->sections) != NULL
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&& s->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
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&& !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr))
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return FALSE;
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return TRUE;
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@ -6511,6 +6518,10 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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if (inputobj->flags
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& (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED))
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continue;
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s = inputobj->sections;
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if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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s = bfd_get_section_by_name (inputobj, ".note.GNU-stack");
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if (s)
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{
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@ -6660,9 +6671,10 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
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bfd *sub;
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asection *o;
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for (sub = info->input_bfds; sub != NULL;
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sub = sub->link.next)
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if (bfd_get_flavour (sub) == bfd_target_elf_flavour)
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for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
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if (bfd_get_flavour (sub) == bfd_target_elf_flavour
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&& (o = sub->sections) != NULL
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&& o->sec_info_type != SEC_INFO_TYPE_JUST_SYMS)
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for (o = sub->sections; o != NULL; o = o->next)
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if (elf_section_data (o)->this_hdr.sh_type
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== SHT_PREINIT_ARRAY)
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@ -12911,6 +12923,9 @@ _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info,
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if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
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continue;
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isec = ibfd->sections;
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if (isec == NULL || isec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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/* Ensure all linker created sections are kept,
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see if any other section is already marked,
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@ -13016,6 +13031,9 @@ elf_gc_sweep (bfd *abfd, struct bfd_link_info *info)
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if (bfd_get_flavour (sub) != bfd_target_elf_flavour
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|| !(*bed->relocs_compatible) (sub->xvec, abfd->xvec))
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continue;
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o = sub->sections;
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if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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for (o = sub->sections; o != NULL; o = o->next)
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{
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@ -13253,6 +13271,9 @@ bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED,
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if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
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continue;
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sec = ibfd->sections;
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if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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if (!init_reloc_cookie (&cookie, info, ibfd))
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return FALSE;
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@ -13300,6 +13321,9 @@ bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
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asection *sec;
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struct elf_reloc_cookie cookie;
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sec = sub->sections;
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if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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sec = bfd_get_section_by_name (sub, ".eh_frame");
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while (sec && init_reloc_cookie_for_section (&cookie, info, sec))
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{
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@ -13336,6 +13360,10 @@ bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
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|| !(*bed->relocs_compatible) (sub->xvec, abfd->xvec))
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continue;
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o = sub->sections;
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if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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/* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
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Also treat note sections as a root, if the section is not part
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of a group. */
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@ -13840,9 +13868,13 @@ bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info)
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for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next)
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{
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const struct elf_backend_data *bed;
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asection *s;
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if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
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continue;
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s = abfd->sections;
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if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
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continue;
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bed = get_elf_backend_data (abfd);
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@ -1,3 +1,9 @@
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2017-06-26 Alan Modra <amodra@gmail.com>
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* emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Skip
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--just-syms bfds when looking for a place to attach .note.gnu.build-id
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and .eh_frame_hdr sections. Delete dead code.
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2017-06-24 Thomas Preud'homme <thomas.preudhomme@arm.com>
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* testsuite/ld-arm/arm-elf.exp (EABI attribute merging 11): New test.
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@ -1245,7 +1245,8 @@ gld${EMULATION_NAME}_after_open (void)
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for (abfd = link_info.input_bfds;
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abfd != (bfd *) NULL; abfd = abfd->link.next)
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if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
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&& bfd_count_sections (abfd) != 0)
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&& bfd_count_sections (abfd) != 0
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&& !((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
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break;
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/* PR 10555: If there are no ELF input files do not try to
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@ -1285,6 +1286,10 @@ gld${EMULATION_NAME}_after_open (void)
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for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
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{
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int type = 0;
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if (((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
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continue;
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for (s = abfd->sections; s && type < COMPACT_EH_HDR; s = s->next)
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{
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const char *name = bfd_get_section_name (abfd, s);
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@ -1323,9 +1328,6 @@ gld${EMULATION_NAME}_after_open (void)
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if (seen_type == COMPACT_EH_HDR)
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link_info.eh_frame_hdr_type = COMPACT_EH_HDR;
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if (bfd_count_sections (abfd) == 0)
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continue;
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}
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if (elfbfd)
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{
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