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Lack of SHF_GROUP sections result in ld segfault 

PR 20520
	* elf.c (_bfd_elf_setup_sections): Check that SHT_GROUP sections
	have corresponding SHF_GROUP sections.
	(bfd_elf_set_group_contents): Comment.
This commit is contained in:
Alan Modra 2016-08-27 09:43:42 +09:30
parent 8a9e8e72fe
commit 53720c495c
2 changed files with 26 additions and 4 deletions
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7
bfd/ChangeLog
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@ -1,3 +1,10 @@
2016-08-27 Alan Modra <amodra@gmail.com>
PR 20520
* elf.c (_bfd_elf_setup_sections): Check that SHT_GROUP sections
have corresponding SHF_GROUP sections.
(bfd_elf_set_group_contents): Comment.
2016-08-27 Alan Modra <amodra@gmail.com>
PR 20519

23
bfd/elf.c
View File

@ -834,6 +834,14 @@ _bfd_elf_setup_sections (bfd *abfd)
elf_linked_to_section (s) = linksec;
}
}
else if (this_hdr->sh_type == SHT_GROUP
&& elf_next_in_group (s) == NULL)
{
(*_bfd_error_handler)
(_("%B: SHT_GROUP section [index %d] has no SHF_GROUP sections"),
abfd, elf_section_data (s)->this_idx);
result = FALSE;
}
}
/* Process section groups. */
@ -3403,12 +3411,19 @@ bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
/* The ELF backend linker sets sh_info to -2 when the group
signature symbol is global, and thus the index can't be
set until all local symbols are output. */
asection *igroup = elf_sec_group (elf_next_in_group (sec));
struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
unsigned long symndx = sec_data->this_hdr.sh_info;
unsigned long extsymoff = 0;
asection *igroup;
struct bfd_elf_section_data *sec_data;
unsigned long symndx;
unsigned long extsymoff;
struct elf_link_hash_entry *h;
/* The point of this little dance to the first SHF_GROUP section
then back to the SHT_GROUP section is that this gets us to
the SHT_GROUP in the input object. */
igroup = elf_sec_group (elf_next_in_group (sec));
sec_data = elf_section_data (igroup);
symndx = sec_data->this_hdr.sh_info;
extsymoff = 0;
if (!elf_bad_symtab (igroup->owner))
{
Elf_Internal_Shdr *symtab_hdr;