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ia64: Check UNDEFWEAK_NO_DYNAMIC_RELOC 

Don't generate dynamic relocation against weak undefined symbol if it
is resolved to zero.  FIXME: UNDEFWEAK_NO_DYNAMIC_RELOC may need to be
checked in more places.

	PR ld/22269
	* elfnn-ia64.c (elfNN_ia64_check_relocs): Don't allocate
	dynamic relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(allocate_fptr): Don't allocate function pointer if
	UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(allocate_dynrel_entries): Don't allocate dynamic relocation
	if UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(set_got_entry): Don't set GOT entry if
	UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(set_pltoff_entry): Don't set PLTOFF entry if
	UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(elfNN_ia64_relocate_section): Don't install dynamic relocation
	UNDEFWEAK_NO_DYNAMIC_RELOC is true.
This commit is contained in:
H.J. Lu 2017-10-14 10:53:43 -07:00
parent ad95120309
commit db41f6eb52
2 changed files with 31 additions and 5 deletions
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16
bfd/ChangeLog
View File

@ -1,3 +1,19 @@
2017-10-14 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22269
* elfnn-ia64.c (elfNN_ia64_check_relocs): Don't allocate
dynamic relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true.
(allocate_fptr): Don't allocate function pointer if
UNDEFWEAK_NO_DYNAMIC_RELOC is true.
(allocate_dynrel_entries): Don't allocate dynamic relocation
if UNDEFWEAK_NO_DYNAMIC_RELOC is true.
(set_got_entry): Don't set GOT entry if
UNDEFWEAK_NO_DYNAMIC_RELOC is true.
(set_pltoff_entry): Don't set PLTOFF entry if
UNDEFWEAK_NO_DYNAMIC_RELOC is true.
(elfNN_ia64_relocate_section): Don't install dynamic relocation
UNDEFWEAK_NO_DYNAMIC_RELOC is true.
2017-10-14 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22269

20
bfd/elfnn-ia64.c
View File

@ -2190,6 +2190,9 @@ elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info,
else
h = NULL;
if (h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
continue;
/* We can only get preliminary data on whether a symbol is
locally or externally defined, as not all of the input files
have yet been processed. Do something with what we know, as
@ -2365,6 +2368,9 @@ elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info,
else
h = NULL;
if (h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
continue;
/* We can only get preliminary data on whether a symbol is
locally or externally defined, as not all of the input files
have yet been processed. Do something with what we know, as
@ -2717,7 +2723,8 @@ allocate_fptr (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data)
if (!bfd_link_executable (x->info)
&& (!h
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
&& !UNDEFWEAK_NO_DYNAMIC_RELOC (x->info, h))
|| (h->root.type != bfd_link_hash_undefweak
&& h->root.type != bfd_link_hash_undefined)))
{
@ -2846,8 +2853,8 @@ allocate_dynrel_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
shared = bfd_link_pic (x->info);
resolved_zero = (dyn_i->h
&& ELF_ST_VISIBILITY (dyn_i->h->other)
&& dyn_i->h->root.type == bfd_link_hash_undefweak);
&& UNDEFWEAK_NO_DYNAMIC_RELOC (x->info,
dyn_i->h));
/* Take care of the GOT and PLT relocations. */
@ -3319,7 +3326,8 @@ set_got_entry (bfd *abfd, struct bfd_link_info *info,
/* Install a dynamic relocation if needed. */
if (((bfd_link_pic (info)
&& (!dyn_i->h
|| ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
|| (ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
&& !UNDEFWEAK_NO_DYNAMIC_RELOC (info, dyn_i->h))
|| dyn_i->h->root.type != bfd_link_hash_undefweak)
&& dyn_r_type != R_IA64_DTPREL32LSB
&& dyn_r_type != R_IA64_DTPREL64LSB)
@ -3483,7 +3491,8 @@ set_pltoff_entry (bfd *abfd, struct bfd_link_info *info,
if (!is_plt
&& bfd_link_pic (info)
&& (!dyn_i->h
|| ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
|| (ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
&& !UNDEFWEAK_NO_DYNAMIC_RELOC (info, dyn_i->h))
|| dyn_i->h->root.type != bfd_link_hash_undefweak))
{
unsigned int dyn_r_type;
@ -3944,6 +3953,7 @@ elfNN_ia64_relocate_section (bfd *output_bfd,
case R_IA64_DIR64LSB:
/* Install a dynamic relocation for this reloc. */
if ((dynamic_symbol_p || bfd_link_pic (info))
&& !(h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
&& r_symndx != STN_UNDEF
&& (input_section->flags & SEC_ALLOC) != 0)
{