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* elflink.h (elf_link_input_bfd): Don't zero discarded link-once

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section sym values.  Instead replace any relocs against them with
	relocs against STN_UNDEF, which has a zero value.
This commit is contained in:
Alan Modra
2001-10-06 07:25:40 +00:00
parent fb9ceeac4e
commit 50b4d48631
2 changed files with 52 additions and 14 deletions
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4
bfd/ChangeLog
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@ -1,5 +1,9 @@
2001-10-06 Alan Modra <amodra@bigpond.net.au> 2001-10-06 Alan Modra <amodra@bigpond.net.au>
* elflink.h (elf_link_input_bfd): Don't zero discarded link-once
section sym values. Instead replace any relocs against them with
relocs against STN_UNDEF, which has a zero value.
* elf32-arc.c (elf_arc_howto_table): Set partial_inplace for all * elf32-arc.c (elf_arc_howto_table): Set partial_inplace for all
relocs. relocs.

62
bfd/elflink.h
View File

@ -5993,20 +5993,6 @@ elf_link_input_bfd (finfo, input_bfd)
if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
{ {
/* If this is a discarded link-once section symbol, set its
value to 0. We should really undefine it, and complain
if anything in the final link tries to use it, but
DWARF-based exception handling might have an entry in
.eh_frame to describe a routine in the linkonce section,
and it turns out to be hard to remove the .eh_frame entry
too. FIXME. */
if (isec != NULL
&& (bfd_get_section_flags (input_bfd, isec) & SEC_LINK_ONCE) != 0
&& bfd_is_abs_section (isec->output_section))
{
isym->st_value = 0;
}
/* We never output section symbols. Instead, we use the /* We never output section symbols. Instead, we use the
section symbol of the corresponding section in the output section symbol of the corresponding section in the output
file. */ file. */
@ -6130,6 +6116,54 @@ elf_link_input_bfd (finfo, input_bfd)
&& o->reloc_count > 0) && o->reloc_count > 0)
return false; return false;
#if BFD_VERSION_DATE < 20031005
{
Elf_Internal_Rela *rel, *relend;
/* Run through the relocs looking for any against section
symbols from removed link-once sections. Set any such
relocs to be against 0. We should really complain if
anything in the final link tries to use it, but
DWARF-based exception handling might have an entry in
.eh_frame to describe a routine in the linkonce section,
and it turns out to be hard to remove the .eh_frame entry
too. FIXME. */
rel = internal_relocs;
relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel;
for ( ; rel < relend; rel++)
{
unsigned long r_symndx = ELF_R_SYM (rel->r_info);
if (r_symndx < locsymcount
&& (!elf_bad_symtab (input_bfd)
|| finfo->sections[r_symndx] != NULL))
{
isym = finfo->internal_syms + r_symndx;
if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
{
asection *sec = finfo->sections[r_symndx];
if (sec != NULL
&& (sec->flags & SEC_LINK_ONCE) != 0
&& bfd_is_abs_section (sec->output_section))
{
long r_type = ELF_R_TYPE (rel->r_info);
rel->r_info = ELF_R_INFO (0, r_type);
#if BFD_VERSION_DATE > 20021005
(*finfo->info->callbacks->warning)
(finfo->info,
_("warning: relocation against removed section; zeroing"),
NULL, input_bfd, o, rel->r_offset);
#endif
}
}
}
}
}
#else
#error "This kludge ought to be fixed properly in gcc by now"
#endif
/* Relocate the section by invoking a back end routine. /* Relocate the section by invoking a back end routine.
The back end routine is responsible for adjusting the The back end routine is responsible for adjusting the