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Use dynamic text relocs for protected vars 

Rather than reporting a link error on attempting to use dynbss for
protected vars, use dynamic text relocs.

	* elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Heed -z nocopyreloc.
	Use text relocs rather than giving an error on trying to use
	.dynbss for protected shared lib vars.
	* elf64-ppc.c (ppc64_elf_adjust_dynamic_symbol): Likewise.
This commit is contained in:
Alan Modra 2015-02-23 16:45:05 +10:30
parent e26e334457
commit a127494f2d
3 changed files with 41 additions and 0 deletions
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7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
2015-02-26 Alan Modra <amodra@gmail.com>
* elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Heed -z nocopyreloc.
Use text relocs rather than giving an error on trying to use
.dynbss for protected shared lib vars.
* elf64-ppc.c (ppc64_elf_adjust_dynamic_symbol): Likewise.
2015-02-25 Andrew Burgess <andrew.burgess@embecosm.com>
* elf32-avr.c (struct elf_avr_section_data): New structure.

17
bfd/elf32-ppc.c
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@ -5582,6 +5582,13 @@ ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
if (!h->non_got_ref)
return TRUE;
/* If -z nocopyreloc was given, we won't generate them either. */
if (info->nocopyreloc)
{
h->non_got_ref = 0;
return TRUE;
}
/* If we didn't find any dynamic relocs in read-only sections, then
we'll be keeping the dynamic relocs and avoiding the copy reloc.
We can't do this if there are any small data relocations. This
@ -5598,6 +5605,16 @@ ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
return TRUE;
}
/* Protected variables do not work with .dynbss. The copy in
.dynbss won't be used by the shared library with the protected
definition for the variable. Text relocations are preferable
to an incorrect program. */
if (h->protected_def)
{
h->non_got_ref = 0;
return TRUE;
}
/* We must allocate the symbol in our .dynbss section, which will
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic

17
bfd/elf64-ppc.c
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@ -7089,6 +7089,13 @@ ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
if (!h->def_dynamic || !h->ref_regular || h->def_regular)
return TRUE;
/* If -z nocopyreloc was given, don't generate them either. */
if (info->nocopyreloc)
{
h->non_got_ref = 0;
return TRUE;
}
/* If we didn't find any dynamic relocs in read-only sections, then
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
@ -7097,6 +7104,16 @@ ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
return TRUE;
}
/* Protected variables do not work with .dynbss. The copy in
.dynbss won't be used by the shared library with the protected
definition for the variable. Text relocations are preferable
to an incorrect program. */
if (h->protected_def)
{
h->non_got_ref = 0;
return TRUE;
}
if (h->plt.plist != NULL)
{
/* We should never get here, but unfortunately there are versions