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* elf-eh-frame.c (_bfd_elf_discard_section_eh_frame): If new_size

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is 0, temporarily grow it to minimal CIE size.
	(_bfd_elf_write_section_eh_frame): If input .eh_frame section would
	end up empty, build a fake minimal CIE.
This commit is contained in:
Jakub Jelinek 2001-12-19 11:48:15 +00:00
parent 9d201f2ff1
commit a5eb27e6ff
2 changed files with 24 additions and 1 deletions
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7
bfd/ChangeLog
View file

@ -1,3 +1,10 @@
2001-12-19 Jakub Jelinek <jakub@redhat.com>
* elf-eh-frame.c (_bfd_elf_discard_section_eh_frame): If new_size
is 0, temporarily grow it to minimal CIE size.
(_bfd_elf_write_section_eh_frame): If input .eh_frame section would
end up empty, build a fake minimal CIE.
2001-12-19 Steve Ellcey <sje@cup.hp.com>
* config.bfd (bfd_elf32_ia64_hpux_big_vec): New vector for

18
bfd/elf-eh-frame.c
View file

@ -701,8 +701,12 @@ _bfd_elf_discard_section_eh_frame (abfd, info, sec, ehdrsec,
hdr_info->last_cie_offset = sec_info->entry[last_cie_ndx].new_offset;
}
/* Shrink the sec as needed. */
/* FIXME: Currently it is not possible to shrink sections to zero size at
this point, so build a fake minimal CIE. */
if (new_size == 0)
new_size = 16;
/* Shrink the sec as needed. */
sec->_cooked_size = new_size;
if (sec->_cooked_size == 0)
sec->flags |= SEC_EXCLUDE;
@ -1069,6 +1073,18 @@ _bfd_elf_write_section_eh_frame (abfd, sec, ehdrsec, contents)
p += sec_info->entry[i].size;
}
/* FIXME: Once _bfd_elf_discard_section_eh_frame will be able to
shrink sections to zero size, this won't be needed any more. */
if (p == contents && sec->_cooked_size == 16)
{
bfd_put_32 (abfd, 12, p); /* Fake CIE length */
bfd_put_32 (abfd, 0, p + 4); /* Fake CIE id */
p[8] = 1; /* Fake CIE version */
memset (p + 9, 0, 7); /* Fake CIE augmentation, 3xleb128
and 3xDW_CFA_nop as pad */
p += 16;
}
BFD_ASSERT ((bfd_size_type) (p - contents) == sec->_cooked_size);
return bfd_set_section_contents (abfd, sec->output_section,