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PR23850, strip should not discard/move .rela.plt in executable 

strip/objcopy can't deal with alloc reloc sections, not .rela.dyn or
.rela.plt in a dynamic executable, or .rela.plt/.rela.iplt in a static
executable.  So, don't have BFD treat them as side-channel data
associated with the section they are relocating.

	PR 23850
	* elf.c (bfd_section_from_shdr): Treat SHF_ALLOC SHT_REL* sections
	in an executable or shared library as normal sections.
This commit is contained in:
Alan Modra 2018-11-02 11:47:07 +10:30
parent 3ba2ee38a6
commit a4bcd73371
2 changed files with 17 additions and 8 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2018-11-02 Alan Modra <amodra@gmail.com>
PR 23850
* elf.c (bfd_section_from_shdr): Treat SHF_ALLOC SHT_REL* sections
in an executable or shared library as normal sections.
2018-10-31 Renlin Li <renlin.li@arm.com>
* elfnn-aarch64.c (elfNN_aarch64_check_relocs): Don't create got

19
bfd/elf.c
View File

@ -2384,15 +2384,18 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
&& ! bfd_section_from_shdr (abfd, hdr->sh_link))
goto fail;
/* If this reloc section does not use the main symbol table we
don't treat it as a reloc section. BFD can't adequately
represent such a section, so at least for now, we don't
try. We just present it as a normal section. We also
can't use it as a reloc section if it points to the null
section, an invalid section, another reloc section, or its
sh_link points to the null section. */
if (hdr->sh_link != elf_onesymtab (abfd)
/* If this is an alloc section in an executable or shared
library, or the reloc section does not use the main symbol
table we don't treat it as a reloc section. BFD can't
adequately represent such a section, so at least for now,
we don't try. We just present it as a normal section. We
also can't use it as a reloc section if it points to the
null section, an invalid section, another reloc section, or
its sh_link points to the null section. */
if (((abfd->flags & (DYNAMIC | EXEC_P)) != 0
&& (hdr->sh_flags & SHF_ALLOC) != 0)
|| hdr->sh_link == SHN_UNDEF
|| hdr->sh_link != elf_onesymtab (abfd)
|| hdr->sh_info == SHN_UNDEF
|| hdr->sh_info >= num_sec
|| elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL