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| author | Alan Modra <amodra@gmail.com> | 2017-11-04 13:41:29 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2017-11-05 09:37:33 +1030 |
| commit | f15d0b545b9e9dada8d1398163693f67792e9e79 (patch) | |
| tree | e5d754764e1f0a3e6139d8f2a3d9a72273170ccf /bfd/elf64-ppc.c | |
| parent | 98bbb1b86180324b278842d8d73c79cb5d76d349 (diff) | |
| download | gdb-f15d0b545b9e9dada8d1398163693f67792e9e79.zip gdb-f15d0b545b9e9dada8d1398163693f67792e9e79.tar.gz gdb-f15d0b545b9e9dada8d1398163693f67792e9e79.tar.bz2 | |
powerpc TLS in PIEs
This patch removes unnecessary GOT IE TLS relocations in PIEs. Useful
with --no-tls-optimize, or with an enormous TLS segment. With the
default --tls-optimize in effect IE code sequences will be edited to
LE under the same circumstances we can remove the GOT reloc.
* elf32-ppc.c (got_entries_needed, got_relocs_needed): New functions.
(allocate_dynrelocs, ppc_elf_size_dynamic_sections): Use them here.
(ppc_elf_relocate_section): Don't output a dynamic relocation
for IE GOT entries in an executable.
* elf64-ppc.c (allocate_got): Trim unnecessary TPREL relocs.
(ppc64_elf_size_dynamic_sections): Likewise.
(ppc64_elf_relocate_section): Likewise.
Diffstat (limited to 'bfd/elf64-ppc.c')
| -rw-r--r-- | bfd/elf64-ppc.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c index bd42af0..31cb2f2 100644 --- a/bfd/elf64-ppc.c +++ b/bfd/elf64-ppc.c @@ -9584,7 +9584,10 @@ allocate_got (struct elf_link_hash_entry *h, htab->elf.irelplt->size += rentsize; htab->got_reli_size += rentsize; } - else if ((bfd_link_pic (info) + else if (((bfd_link_pic (info) + && !((gent->tls_type & TLS_TPREL) != 0 + && bfd_link_executable (info) + && SYMBOL_REFERENCES_LOCAL (info, h))) || (htab->elf.dynamic_sections_created && h->dynindx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))) @@ -10072,7 +10075,9 @@ ppc64_elf_size_dynamic_sections (bfd *output_bfd, htab->elf.irelplt->size += rel_size; htab->got_reli_size += rel_size; } - else if (bfd_link_pic (info)) + else if (bfd_link_pic (info) + && !((ent->tls_type & TLS_TPREL) != 0 + && bfd_link_executable (info))) { asection *srel = ppc64_elf_tdata (ibfd)->relgot; srel->size += rel_size; @@ -14514,7 +14519,10 @@ ppc64_elf_relocate_section (bfd *output_bfd, && (h == NULL || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf) || (tls_type == (TLS_TLS | TLS_LD) - && !h->elf.def_dynamic)))) + && !h->elf.def_dynamic)) + && !(tls_type == (TLS_TLS | TLS_TPREL) + && bfd_link_executable (info) + && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))) relgot = ppc64_elf_tdata (ent->owner)->relgot; if (relgot != NULL) { |